Merge pull request #3 from gedoor/master

up

app/build.gradle

@@ -37,6 +37,7 @@ android {
         versionName version
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         project.ext.set("archivesBaseName", name + "_" + version)
+        multiDexEnabled true
     }
     buildTypes {
         release {
@@ -98,7 +99,7 @@ dependencies {
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
     implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.0.0'
     implementation 'androidx.viewpager2:viewpager2:1.0.0'
-    implementation 'com.google.android.material:material:1.2.0-alpha02'
+    implementation 'com.google.android.material:material:1.2.0-alpha03'
     implementation 'com.google.android:flexbox:1.1.0'
 
     //lifecycle
@@ -107,12 +108,12 @@ dependencies {
     implementation "androidx.lifecycle:lifecycle-common-java8:$lifecycle_version"
 
     //room
-    def room_version = '2.2.2'
+    def room_version = '2.2.3'
     implementation "androidx.room:room-runtime:$room_version"
     kapt "androidx.room:room-compiler:$room_version"
 
     //paging
-    implementation 'androidx.paging:paging-runtime:2.1.0'
+    implementation 'androidx.paging:paging-runtime:2.1.1'
 
     //anko
     def anko_version = '0.10.8'

app/src/main/assets/updateLog.md

@@ -4,8 +4,36 @@
 * 先在旧版阅读(2.x)中进行备份，然后在新版阅读(3.x)【我的】->【备份与恢复】，选择【导入旧版本数据】，提示存储权限，选择允许即可导入成功。
 * 注意：由于安卓10更改了权限策略，还需要给「允许安装其他应用」的权限才能导入源。MIUI11也需要此权限。
 
+**2020/01/03**
+* 适配Android 10 权限
+* 导入旧版本配置不在需要存储权限
+* 选择字体不在需要存储权限
+
+**2019/12/30**
+* 修改书源调试
+  - 调试搜索>>输入关键字，如：`系统`
+  - 调试发现>>输入发现URL，如：`月票榜::https://www.qidian.com/rank/yuepiao?page={{page}}`
+  - 调试详情页>>输入详情页URL，如：`https://m.qidian.com/book/1015609210`
+  - 调试目录页>>输入目录页URL，如：`++https://www.zhaishuyuan.com/read/30394`
+  - 调试正文页>>输入正文页URL，如：`--https://www.zhaishuyuan.com/chapter/30394/20940996`
+  
+* 修改订阅中自动添加style的情景
+  订阅源的内容规则中存在`<style>`或`style=`时，直接显示内容规则的原始内容,否则会在前面加以下内容
+  ```
+  <style>
+  	img{max-width:100% !important; width:auto; height:auto;}
+  	video{object-fit:fill; max-width:100% !important; width:auto; height:auto;}
+  	body{word-wrap:break-word; height:auto;max-width: 100%; width:auto;}
+  </style>
+  ```
+
+**2019/12/28**
+* 添加下载界面
+* 添加分组备份
+
 **2019/12/23**
 * 修复每次打开翻页模式恢复默认的bug
+* 修复m3u8报错问题
 
 **2019/12/22**
 * 更新音频播放界面

app/src/main/java/io/legado/app/constant/Bus.kt

@@ -18,4 +18,6 @@ object Bus {
     const val AUDIO_SIZE = "audioSize"
     const val AUDIO_SPEED = "audioSpeed"
     const val SHOW_RSS = "showRss"
+    const val WEB_SERVICE_STOP = "webServiceStop"
+    const val UP_DOWNLOAD = "upDownload"
 }

app/src/main/java/io/legado/app/constant/PreferKey.kt

@@ -15,4 +15,7 @@ object PreferKey {
     const val cleanCache = "cleanCache"
     const val lastGroup = "lastGroup"
     const val pageAnim = "pageAnim"
+    const val readBookFont = "readBookFont"
+    const val fontFolder = "fontFolder"
+    const val backupPath = "backupUri"
 }

app/src/main/java/io/legado/app/data/dao/BookDao.kt

@@ -17,6 +17,9 @@ interface BookDao {
     @Query("SELECT * FROM books WHERE origin = '${BookType.local}' order by durChapterTime desc")
     fun observeLocal(): LiveData<List<Book>>
 
+    @Query("SELECT * FROM books WHERE origin <> '${BookType.local}' and type = 0 order by durChapterTime desc")
+    fun observeDownload(): LiveData<List<Book>>
+
     @Query("SELECT * FROM books WHERE `group` = :group")
     fun observeByGroup(group: Int): LiveData<List<Book>>
 

app/src/main/java/io/legado/app/data/dao/BookGroupDao.kt

@@ -16,6 +16,9 @@ interface BookGroupDao {
     @get:Query("SELECT MAX(groupId) FROM book_groups")
     val maxId: Int
 
+    @Query("SELECT * FROM book_groups ORDER BY `order`")
+    fun all(): List<BookGroup>
+
     @Insert(onConflict = OnConflictStrategy.REPLACE)
     fun insert(vararg bookGroup: BookGroup)
 

app/src/main/java/io/legado/app/help/BookHelp.kt

@@ -35,13 +35,24 @@ object BookHelp {
         FileHelp.getFolder(getBookCachePath())
     }
 
+    @Synchronized
     fun saveContent(book: Book, bookChapter: BookChapter, content: String) {
         if (content.isEmpty()) return
+        FileHelp.getFolder(getBookFolder(book)).listFiles()?.forEach {
+            if (it.name.startsWith(String.format("%05d", bookChapter.index))) {
+                it.delete()
+                return@forEach
+            }
+        }
         val filePath = getChapterPath(book, bookChapter)
         val file = FileHelp.getFile(filePath)
         file.writeText(content)
     }
 
+    fun getChapterCount(book: Book): Int {
+        return FileHelp.getFolder(getBookFolder(book)).list()?.size ?: 0
+    }
+
     fun hasContent(book: Book, bookChapter: BookChapter): Boolean {
         val filePath = getChapterPath(book, bookChapter)
         runCatching {
@@ -74,11 +85,15 @@ object BookHelp {
         }
     }
 
-    private fun getChapterPath(book: Book, bookChapter: BookChapter): String {
+    private fun getBookFolder(book: Book): String {
         val bookFolder = formatFolderName(book.name + book.bookUrl)
+        return "${getBookCachePath()}${File.separator}$bookFolder"
+    }
+
+    private fun getChapterPath(book: Book, bookChapter: BookChapter): String {
         val chapterFile =
             String.format("%05d-%s", bookChapter.index, MD5Utils.md5Encode(bookChapter.title))
-        return "${getBookCachePath()}${File.separator}$bookFolder${File.separator}$chapterFile.nb"
+        return "${getBookFolder(book)}${File.separator}$chapterFile.nb"
     }
 
     private fun formatFolderName(folderName: String): String {

app/src/main/java/io/legado/app/help/storage/Backup.kt

@@ -1,9 +1,13 @@
 package io.legado.app.help.storage
 
+import android.content.Context
+import android.net.Uri
+import androidx.documentfile.provider.DocumentFile
 import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.help.FileHelp
 import io.legado.app.help.ReadBookConfig
+import io.legado.app.utils.DocumentUtils
 import io.legado.app.utils.FileUtils
 import io.legado.app.utils.GSON
 import org.jetbrains.anko.defaultSharedPreferences
@@ -27,8 +31,52 @@ object Backup {
         legadoPath + File.separator + "Export"
     }
 
-    private fun pbackup(path :String = legadoPath){
+    fun backup(context: Context, uri: Uri) {
+        DocumentFile.fromTreeUri(context, uri)?.listFiles()?.forEach { doc ->
+            when (doc.name) {
+                "bookshelf.json" -> App.db.bookDao().allBooks.let {
+                    if (it.isNotEmpty()) {
+                        val json = GSON.toJson(it)
+                        DocumentUtils.writeText(context, json, doc.uri)
+                    }
+                }
+                "bookGroup.json" -> App.db.bookGroupDao().all().let {
+                    if (it.isNotEmpty()) {
+                        val json = GSON.toJson(it)
+                        DocumentUtils.writeText(context, json, doc.uri)
+                    }
+                }
+                "bookSource.json" -> App.db.bookSourceDao().all.let {
+                    if (it.isNotEmpty()) {
+                        val json = GSON.toJson(it)
+                        DocumentUtils.writeText(context, json, doc.uri)
+                    }
+                }
+                "rssSource.json" -> App.db.rssSourceDao().all.let {
+                    if (it.isNotEmpty()) {
+                        val json = GSON.toJson(it)
+                        DocumentUtils.writeText(context, json, doc.uri)
+                    }
+                }
+                "replaceRule.json" -> App.db.replaceRuleDao().all.let {
+                    if (it.isNotEmpty()) {
+                        val json = GSON.toJson(it)
+                        DocumentUtils.writeText(context, json, doc.uri)
+                    }
+                }
+                ReadBookConfig.readConfigFileName -> GSON.toJson(ReadBookConfig.configList)?.let {
+                    DocumentUtils.writeText(context, it, doc.uri)
+                }
+                "config.xml" -> {
+
+                }
+            }
+        }
+    }
+
+    private fun pBackup(path: String = legadoPath) {
         backupBookshelf(path)
+        backupBookGroup(path)
         backupBookSource(path)
         backupRssSource(path)
         backupReplaceRule(path)
@@ -39,7 +87,7 @@ object Backup {
 
     fun backup() {
         doAsync {
-            pbackup()
+            pBackup()
             uiThread {
                 App.INSTANCE.toast(R.string.backup_success)
             }
@@ -48,7 +96,7 @@ object Backup {
 
     fun autoBackup() {
         doAsync {
-            pbackup()
+            pBackup()
         }
     }
 
@@ -56,13 +104,22 @@ object Backup {
         App.db.bookDao().allBooks.let {
             if (it.isNotEmpty()) {
                 val json = GSON.toJson(it)
-
                 val file = FileHelp.getFile(path + File.separator + "bookshelf.json")
                 file.writeText(json)
             }
         }
     }
 
+    private fun backupBookGroup(path: String) {
+        App.db.bookGroupDao().all().let {
+            if (it.isNotEmpty()) {
+                val json = GSON.toJson(it)
+                val file = FileHelp.getFile(path + File.separator + "bookGroup.json")
+                file.writeText(json)
+            }
+        }
+    }
+
     private fun backupBookSource(path: String) {
         App.db.bookSourceDao().all.let {
             if (it.isNotEmpty()) {

app/src/main/java/io/legado/app/help/storage/OldRule.kt

@@ -205,4 +205,5 @@ object OldRule {
         return GSON.toJson(map)
     }
 
+
 }

app/src/main/java/io/legado/app/help/storage/Restore.kt

@@ -9,10 +9,7 @@ import com.jayway.jsonpath.ParseContext
 import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.constant.AppConst
-import io.legado.app.data.entities.Book
+import io.legado.app.data.entities.*
-import io.legado.app.data.entities.BookSource
-import io.legado.app.data.entities.ReplaceRule
-import io.legado.app.data.entities.RssSource
 import io.legado.app.help.FileHelp
 import io.legado.app.help.ReadBookConfig
 import io.legado.app.utils.*
@@ -47,6 +44,15 @@ object Restore {
             } catch (e: Exception) {
                 e.printStackTrace()
             }
+            try {
+                val file = FileHelp.getFile(path + File.separator + "bookGroup.json")
+                val json = file.readText()
+                GSON.fromJsonArray<BookGroup>(json)?.let {
+                    App.db.bookGroupDao().insert(*it.toTypedArray())
+                }
+            } catch (e: Exception) {
+                e.printStackTrace()
+            }
             try {
                 val file = FileHelp.getFile(path + File.separator + "bookSource.json")
                 val json = file.readText()
@@ -105,47 +111,12 @@ object Restore {
     fun importYueDuData(context: Context) {
         GlobalScope.launch(IO) {
             try {// 导入书架
-                val shelfFile = FileHelp.getFile(Backup.defaultPath + File.separator + "myBookShelf.json")
+                val shelfFile =
-                val books = mutableListOf<Book>()
+                    FileHelp.getFile(Backup.defaultPath + File.separator + "myBookShelf.json")
-                val items: List<Map<String, Any>> = jsonPath.parse(shelfFile.readText()).read("$")
+                val json = shelfFile.readText()
-                val existingBooks = App.db.bookDao().allBookUrls.toSet()
+                val importCount = importOldBookshelf(json)
-                for (item in items) {
-                    val jsonItem = jsonPath.parse(item)
-                    val book = Book()
-                    book.bookUrl = jsonItem.readString("$.noteUrl") ?: ""
-                    if (book.bookUrl.isBlank()) continue
-                    book.name = jsonItem.readString("$.bookInfoBean.name") ?: ""
-                    if (book.bookUrl in existingBooks) {
-                        Log.d(AppConst.APP_TAG, "Found existing book: ${book.name}")
-                        continue
-                    }
-                    book.origin = jsonItem.readString("$.tag") ?: ""
-                    book.originName = jsonItem.readString("$.bookInfoBean.origin") ?: ""
-                    book.author = jsonItem.readString("$.bookInfoBean.author") ?: ""
-                    book.type =
-                        if (jsonItem.readString("$.bookInfoBean.bookSourceType") == "AUDIO") 1 else 0
-                    book.tocUrl = jsonItem.readString("$.bookInfoBean.chapterUrl") ?: book.bookUrl
-                    book.coverUrl = jsonItem.readString("$.bookInfoBean.coverUrl")
-                    book.customCoverUrl = jsonItem.readString("$.customCoverPath")
-                    book.lastCheckTime = jsonItem.readLong("$.bookInfoBean.finalRefreshData") ?: 0
-                    book.canUpdate = jsonItem.readBool("$.allowUpdate") == true
-                    book.totalChapterNum = jsonItem.readInt("$.chapterListSize") ?: 0
-                    book.durChapterIndex = jsonItem.readInt("$.durChapter") ?: 0
-                    book.durChapterTitle = jsonItem.readString("$.durChapterName")
-                    book.durChapterPos = jsonItem.readInt("$.durChapterPage") ?: 0
-                    book.durChapterTime = jsonItem.readLong("$.finalDate") ?: 0
-                    book.group = jsonItem.readInt("$.group") ?: 0
-                    book.intro = jsonItem.readString("$.bookInfoBean.introduce")
-                    book.latestChapterTitle = jsonItem.readString("$.lastChapterName")
-                    book.lastCheckCount = jsonItem.readInt("$.newChapters") ?: 0
-                    book.order = jsonItem.readInt("$.serialNumber") ?: 0
-                    book.useReplaceRule = jsonItem.readBool("$.useReplaceRule") == true
-                    book.variable = jsonItem.readString("$.variable")
-                    books.add(book)
-                }
-                App.db.bookDao().insert(*books.toTypedArray())
                 withContext(Main) {
-                    context.toast("成功导入书籍${books.size}")
+                    context.toast("成功导入书籍${importCount}")
                 }
             } catch (e: Exception) {
                 withContext(Main) {
@@ -156,17 +127,10 @@ object Restore {
             try {// Book source
                 val sourceFile =
                     FileHelp.getFile(Backup.defaultPath + File.separator + "myBookSource.json")
-                val bookSources = mutableListOf<BookSource>()
+                val json = sourceFile.readText()
-                val items: List<Map<String, Any>> = jsonPath.parse(sourceFile.readText()).read("$")
+                val importCount = importOldSource(json)
-                for (item in items) {
-                    val jsonItem = jsonPath.parse(item)
-                    OldRule.jsonToBookSource(jsonItem.jsonString())?.let {
-                        bookSources.add(it)
-                    }
-                }
-                App.db.bookSourceDao().insert(*bookSources.toTypedArray())
                 withContext(Main) {
-                    context.toast("成功导入书源${bookSources.size}")
+                    context.toast("成功导入书源${importCount}")
                 }
             } catch (e: Exception) {
                 withContext(Main) {
@@ -177,26 +141,10 @@ object Restore {
             try {// Replace rules
                 val ruleFile =
                     FileHelp.getFile(Backup.defaultPath + File.separator + "myBookReplaceRule.json")
-                val replaceRules = mutableListOf<ReplaceRule>()
+                val json = ruleFile.readText()
-                val items: List<Map<String, Any>> = jsonPath.parse(ruleFile.readText()).read("$")
+                val importCount = importOldReplaceRule(json)
-                val existingRules = App.db.replaceRuleDao().all.map { it.pattern }.toSet()
-                for ((index: Int, item: Map<String, Any>) in items.withIndex()) {
-                    val jsonItem = jsonPath.parse(item)
-                    val rule = ReplaceRule()
-                    rule.id = jsonItem.readLong("$.id") ?: System.currentTimeMillis().plus(index)
-                    rule.pattern = jsonItem.readString("$.regex") ?: ""
-                    if (rule.pattern.isEmpty() || rule.pattern in existingRules) continue
-                    rule.name = jsonItem.readString("$.replaceSummary") ?: ""
-                    rule.replacement = jsonItem.readString("$.replacement") ?: ""
-                    rule.isRegex = jsonItem.readBool("$.isRegex") == true
-                    rule.scope = jsonItem.readString("$.useTo")
-                    rule.isEnabled = jsonItem.readBool("$.enable") == true
-                    rule.order = jsonItem.readInt("$.serialNumber") ?: index
-                    replaceRules.add(rule)
-                }
-                App.db.replaceRuleDao().insert(*replaceRules.toTypedArray())
                 withContext(Main) {
-                    context.toast("成功导入替换规则${replaceRules.size}")
+                    context.toast("成功导入替换规则${importCount}")
                 }
             } catch (e: Exception) {
                 withContext(Main) {
@@ -205,4 +153,81 @@ object Restore {
             }
         }
     }
+
+    fun importOldBookshelf(json: String): Int {
+        val books = mutableListOf<Book>()
+        val items: List<Map<String, Any>> = jsonPath.parse(json).read("$")
+        val existingBooks = App.db.bookDao().allBookUrls.toSet()
+        for (item in items) {
+            val jsonItem = jsonPath.parse(item)
+            val book = Book()
+            book.bookUrl = jsonItem.readString("$.noteUrl") ?: ""
+            if (book.bookUrl.isBlank()) continue
+            book.name = jsonItem.readString("$.bookInfoBean.name") ?: ""
+            if (book.bookUrl in existingBooks) {
+                Log.d(AppConst.APP_TAG, "Found existing book: ${book.name}")
+                continue
+            }
+            book.origin = jsonItem.readString("$.tag") ?: ""
+            book.originName = jsonItem.readString("$.bookInfoBean.origin") ?: ""
+            book.author = jsonItem.readString("$.bookInfoBean.author") ?: ""
+            book.type =
+                if (jsonItem.readString("$.bookInfoBean.bookSourceType") == "AUDIO") 1 else 0
+            book.tocUrl = jsonItem.readString("$.bookInfoBean.chapterUrl") ?: book.bookUrl
+            book.coverUrl = jsonItem.readString("$.bookInfoBean.coverUrl")
+            book.customCoverUrl = jsonItem.readString("$.customCoverPath")
+            book.lastCheckTime = jsonItem.readLong("$.bookInfoBean.finalRefreshData") ?: 0
+            book.canUpdate = jsonItem.readBool("$.allowUpdate") == true
+            book.totalChapterNum = jsonItem.readInt("$.chapterListSize") ?: 0
+            book.durChapterIndex = jsonItem.readInt("$.durChapter") ?: 0
+            book.durChapterTitle = jsonItem.readString("$.durChapterName")
+            book.durChapterPos = jsonItem.readInt("$.durChapterPage") ?: 0
+            book.durChapterTime = jsonItem.readLong("$.finalDate") ?: 0
+            book.group = jsonItem.readInt("$.group") ?: 0
+            book.intro = jsonItem.readString("$.bookInfoBean.introduce")
+            book.latestChapterTitle = jsonItem.readString("$.lastChapterName")
+            book.lastCheckCount = jsonItem.readInt("$.newChapters") ?: 0
+            book.order = jsonItem.readInt("$.serialNumber") ?: 0
+            book.useReplaceRule = jsonItem.readBool("$.useReplaceRule") == true
+            book.variable = jsonItem.readString("$.variable")
+            books.add(book)
+        }
+        App.db.bookDao().insert(*books.toTypedArray())
+        return books.size
+    }
+
+    fun importOldSource(json: String): Int {
+        val bookSources = mutableListOf<BookSource>()
+        val items: List<Map<String, Any>> = jsonPath.parse(json).read("$")
+        for (item in items) {
+            val jsonItem = jsonPath.parse(item)
+            OldRule.jsonToBookSource(jsonItem.jsonString())?.let {
+                bookSources.add(it)
+            }
+        }
+        App.db.bookSourceDao().insert(*bookSources.toTypedArray())
+        return bookSources.size
+    }
+
+    fun importOldReplaceRule(json: String): Int {
+        val replaceRules = mutableListOf<ReplaceRule>()
+        val items: List<Map<String, Any>> = jsonPath.parse(json).read("$")
+        val existingRules = App.db.replaceRuleDao().all.map { it.pattern }.toSet()
+        for ((index: Int, item: Map<String, Any>) in items.withIndex()) {
+            val jsonItem = jsonPath.parse(item)
+            val rule = ReplaceRule()
+            rule.id = jsonItem.readLong("$.id") ?: System.currentTimeMillis().plus(index)
+            rule.pattern = jsonItem.readString("$.regex") ?: ""
+            if (rule.pattern.isEmpty() || rule.pattern in existingRules) continue
+            rule.name = jsonItem.readString("$.replaceSummary") ?: ""
+            rule.replacement = jsonItem.readString("$.replacement") ?: ""
+            rule.isRegex = jsonItem.readBool("$.isRegex") == true
+            rule.scope = jsonItem.readString("$.useTo")
+            rule.isEnabled = jsonItem.readBool("$.enable") == true
+            rule.order = jsonItem.readInt("$.serialNumber") ?: index
+            replaceRules.add(rule)
+        }
+        App.db.replaceRuleDao().insert(*replaceRules.toTypedArray())
+        return replaceRules.size
+    }
 }

app/src/main/java/io/legado/app/model/Debug.kt

@@ -111,6 +111,24 @@ object Debug {
                 log(webBook.sourceUrl, "⇒开始访问发现页:$url")
                 exploreDebug(webBook, url)
             }
+            key.startsWith("++")-> {
+                val url = key.substring(2)
+                val book = Book()
+                book.origin = webBook.sourceUrl
+                book.tocUrl = url
+                log(webBook.sourceUrl, "⇒开始访目录页:$url")
+                tocDebug(webBook, book)
+            }
+            key.startsWith("--")-> {
+                val url = key.substring(2)
+                val book = Book()
+                book.origin = webBook.sourceUrl
+                log(webBook.sourceUrl, "⇒开始访正文页:$url")
+                val chapter = BookChapter()
+                chapter.title = "调试"
+                chapter.url = url
+                contentDebug(webBook, book, chapter, null)
+            }
             else -> {
                 log(webBook.sourceUrl, "⇒开始搜索关键字:$key")
                 searchDebug(webBook, key)

app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeByRegex.kt

@@ -16,7 +16,7 @@ object AnalyzeByRegex {
             // 新建容器
             val info = arrayListOf<String>()
             for (groupIndex in 0..resM.groupCount()) {
-                info.add(resM.group(groupIndex))
+                info.add(resM.group(groupIndex)!!)
             }
             info
         } else {
@@ -43,7 +43,7 @@ object AnalyzeByRegex {
                 // 新建容器
                 val info = arrayListOf<String>()
                 for (groupIndex in 0..resM.groupCount()) {
-                    info.add(resM.group(groupIndex))
+                    info.add(resM.group(groupIndex)!!)
                 }
                 books.add(info)
             } while (resM.find())

app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeRule.kt

@@ -320,7 +320,7 @@ class AnalyzeRule(var book: BaseBook? = null) : JsExtensions {
                 val pattern = Pattern.compile(rule.replaceRegex)
                 val matcher = pattern.matcher(vResult)
                 if (matcher.find()) {
-                    matcher.group(0).replaceFirst(rule.replaceRegex.toRegex(), rule.replacement)
+                    matcher.group(0)!!.replaceFirst(rule.replaceRegex.toRegex(), rule.replacement)
                 } else {
                     ""
                 }
@@ -614,7 +614,7 @@ class AnalyzeRule(var book: BaseBook? = null) : JsExtensions {
         val pattern = Pattern.compile("(第)(.+?)(章)")
         val matcher = pattern.matcher(s)
         return if (matcher.find()) {
-            matcher.group(1) + StringUtils.stringToInt(matcher.group(2)) + matcher.group(3)
+            matcher.group(1)!! + StringUtils.stringToInt(matcher.group(2)) + matcher.group(3)
         } else {
             s
         }

app/src/main/java/io/legado/app/model/analyzeRule/AnalyzeUrl.kt

@@ -117,7 +117,7 @@ class AnalyzeUrl(
         page?.let {
             val matcher = pagePattern.matcher(ruleUrl)
             while (matcher.find()) {
-                val pages = matcher.group(1).split(",")
+                val pages = matcher.group(1)!!.split(",")
                 ruleUrl = if (page <= pages.size) {
                     ruleUrl.replace(matcher.group(), pages[page - 1].trim { it <= ' ' })
                 } else {

app/src/main/java/io/legado/app/model/rss/RssParser.kt

@@ -122,9 +122,9 @@ object RssParser {
         if (matcherImg.find()) {
             val imgTag = matcherImg.group(1)
             val patternLink = "src\\s*=\\s*\"(.+?)\"".toPattern()
-            val matcherLink = patternLink.matcher(imgTag)
+            val matcherLink = patternLink.matcher(imgTag!!)
             if (matcherLink.find()) {
-                url = matcherLink.group(1).trim()
+                url = matcherLink.group(1)!!.trim()
             }
         }
         return url

app/src/main/java/io/legado/app/service/AudioPlayService.kt

@@ -26,6 +26,7 @@ import io.legado.app.data.entities.BookChapter
 import io.legado.app.help.BookHelp
 import io.legado.app.help.IntentHelp
 import io.legado.app.help.MediaHelp
+import io.legado.app.model.analyzeRule.AnalyzeUrl
 import io.legado.app.receiver.MediaButtonReceiver
 import io.legado.app.service.help.AudioPlay
 import io.legado.app.ui.audio.AudioPlayActivity
@@ -121,8 +122,10 @@ class AudioPlayService : BaseService(),
                 AudioPlay.status = Status.PLAY
                 postEvent(Bus.AUDIO_STATE, Status.PLAY)
                 mediaPlayer.reset()
-                val uri = Uri.parse(url)
+                val analyzeUrl =
-                mediaPlayer.setDataSource(this, uri, AudioPlay.headers())
+                    AnalyzeUrl(url, headerMapF = AudioPlay.headers(), useWebView = true)
+                val uri = Uri.parse(analyzeUrl.url)
+                mediaPlayer.setDataSource(this, uri, analyzeUrl.headerMap)
                 mediaPlayer.prepareAsync()
             } catch (e: Exception) {
                 launch {
@@ -134,14 +137,18 @@ class AudioPlayService : BaseService(),
     }
 
     private fun pause(pause: Boolean) {
-        AudioPlayService.pause = pause
+        if (url.contains(".m3u8", false)) {
-        handler.removeCallbacks(mpRunnable)
+            stopSelf()
-        position = mediaPlayer.currentPosition
+        } else {
-        mediaPlayer.pause()
+            AudioPlayService.pause = pause
-        upMediaSessionPlaybackState(PlaybackStateCompat.STATE_PAUSED)
+            handler.removeCallbacks(mpRunnable)
-        AudioPlay.status = Status.PAUSE
+            position = mediaPlayer.currentPosition
-        postEvent(Bus.AUDIO_STATE, Status.PAUSE)
+            mediaPlayer.pause()
-        upNotification()
+            upMediaSessionPlaybackState(PlaybackStateCompat.STATE_PAUSED)
+            AudioPlay.status = Status.PAUSE
+            postEvent(Bus.AUDIO_STATE, Status.PAUSE)
+            upNotification()
+        }
     }
 
     private fun resume() {
@@ -182,26 +189,24 @@ class AudioPlayService : BaseService(),
      */
     override fun onPrepared(mp: MediaPlayer?) {
         if (pause) return
-        mp?.let {
+        mediaPlayer.start()
-            mp.start()
+        mediaPlayer.seekTo(position)
-            mp.seekTo(position)
+        postEvent(Bus.AUDIO_SIZE, mediaPlayer.duration)
-            postEvent(Bus.AUDIO_SIZE, mp.duration)
+        bookChapter?.let {
-            bookChapter?.let {
+            it.end = mediaPlayer.duration.toLong()
-                it.end = mp.duration.toLong()
-            }
-            handler.removeCallbacks(mpRunnable)
-            handler.post(mpRunnable)
         }
+        handler.removeCallbacks(mpRunnable)
+        handler.post(mpRunnable)
     }
 
     /**
      * 播放出错
      */
     override fun onError(mp: MediaPlayer?, what: Int, extra: Int): Boolean {
-        AudioPlay.status = Status.STOP
+        if (!mediaPlayer.isPlaying) {
-        postEvent(Bus.AUDIO_STATE, Status.STOP)
+            AudioPlay.status = Status.STOP
-        launch {
+            postEvent(Bus.AUDIO_STATE, Status.STOP)
-            toast("error: $what $extra $url")
+            launch { toast("error: $what $extra $url") }
         }
         return true
     }

app/src/main/java/io/legado/app/service/DownloadService.kt

@@ -1,16 +1,19 @@
 package io.legado.app.service
 
 import android.content.Intent
+import android.os.Handler
 import androidx.core.app.NotificationCompat
 import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.base.BaseService
 import io.legado.app.constant.Action
 import io.legado.app.constant.AppConst
+import io.legado.app.constant.Bus
 import io.legado.app.help.BookHelp
 import io.legado.app.help.IntentHelp
 import io.legado.app.help.coroutine.Coroutine
 import io.legado.app.model.WebBook
+import io.legado.app.utils.postEvent
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.asCoroutineDispatcher
 import java.util.concurrent.Executors
@@ -18,10 +21,26 @@ import java.util.concurrent.Executors
 class DownloadService : BaseService() {
     private var searchPool = Executors.newFixedThreadPool(16).asCoroutineDispatcher()
     private var tasks: ArrayList<Coroutine<*>> = arrayListOf()
+    private val handler = Handler()
+    private var runnable: Runnable = Runnable { upDownload() }
+    private var notificationContent = "正在启动下载"
+    private val notificationBuilder by lazy {
+        val builder = NotificationCompat.Builder(this, AppConst.channelIdDownload)
+            .setSmallIcon(R.drawable.ic_download)
+            .setOngoing(true)
+            .setContentTitle(getString(R.string.download_offline))
+        builder.addAction(
+            R.drawable.ic_stop_black_24dp,
+            getString(R.string.cancel),
+            IntentHelp.servicePendingIntent<DownloadService>(this, Action.stop)
+        )
+        builder.setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
+    }
 
     override fun onCreate() {
         super.onCreate()
-        updateNotification("正在启动下载")
+        updateNotification(notificationContent)
+        handler.postDelayed(runnable, 1000)
     }
 
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
@@ -32,7 +51,7 @@ class DownloadService : BaseService() {
                     intent.getIntExtra("start", 0),
                     intent.getIntExtra("end", 0)
                 )
-                Action.stop -> stopSelf()
+                Action.stop -> stopDownload()
             }
         }
         return super.onStartCommand(intent, flags, startId)
@@ -41,7 +60,9 @@ class DownloadService : BaseService() {
     override fun onDestroy() {
         tasks.clear()
         searchPool.close()
+        handler.removeCallbacks(runnable)
         super.onDestroy()
+        postEvent(Bus.UP_DOWNLOAD, false)
     }
 
     private fun download(bookUrl: String?, start: Int, end: Int) {
@@ -55,7 +76,7 @@ class DownloadService : BaseService() {
                     if (!BookHelp.hasContent(book, chapter)) {
                         webBook.getContent(book, chapter, scope = this, context = searchPool)
                             .onStart {
-                                updateNotification(chapter.title)
+                                notificationContent = chapter.title
                             }
                             .onSuccess(IO) { content ->
                                 content?.let {
@@ -75,21 +96,24 @@ class DownloadService : BaseService() {
         }
     }
 
+    private fun stopDownload() {
+        tasks.clear()
+        stopSelf()
+    }
+
+    private fun upDownload() {
+        updateNotification(notificationContent)
+        postEvent(Bus.UP_DOWNLOAD, true)
+        handler.removeCallbacks(runnable)
+        handler.postDelayed(runnable, 1000)
+    }
+
     /**
      * 更新通知
      */
     private fun updateNotification(content: String) {
-        val builder = NotificationCompat.Builder(this, AppConst.channelIdDownload)
+        val builder = notificationBuilder
-            .setSmallIcon(R.drawable.ic_download)
+        builder.setContentText(content)
-            .setOngoing(true)
-            .setContentTitle(getString(R.string.download_offline))
-            .setContentText(content)
-        builder.addAction(
-            R.drawable.ic_stop_black_24dp,
-            getString(R.string.cancel),
-            IntentHelp.servicePendingIntent<DownloadService>(this, Action.stop)
-        )
-        builder.setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
         val notification = builder.build()
         startForeground(AppConst.notificationIdDownload, notification)
     }

app/src/main/java/io/legado/app/service/TTSReadAloudService.kt

@@ -45,16 +45,10 @@ class TTSReadAloudService : BaseReadAloudService(), TextToSpeech.OnInitListener
     override fun onInit(status: Int) {
         launch {
             if (status == TextToSpeech.SUCCESS) {
-                val result = textToSpeech?.setLanguage(Locale.CHINA)
+                textToSpeech?.language = Locale.CHINA
-                if (result == TextToSpeech.LANG_MISSING_DATA || result == TextToSpeech.LANG_NOT_SUPPORTED) {
+                textToSpeech?.setOnUtteranceProgressListener(TTSUtteranceListener())
-                    toast(R.string.tts_fix)
+                ttsIsSuccess = true
-                    IntentHelp.toTTSSetting(this@TTSReadAloudService)
+                play()
-                    stopSelf()
-                } else {
-                    textToSpeech?.setOnUtteranceProgressListener(TTSUtteranceListener())
-                    ttsIsSuccess = true
-                    play()
-                }
             } else {
                 toast(R.string.tts_init_failed)
             }

app/src/main/java/io/legado/app/service/WebService.kt

@@ -8,9 +8,11 @@ import io.legado.app.R
 import io.legado.app.base.BaseService
 import io.legado.app.constant.Action
 import io.legado.app.constant.AppConst
+import io.legado.app.constant.Bus
 import io.legado.app.help.IntentHelp
 import io.legado.app.utils.NetworkUtils
 import io.legado.app.utils.getPrefInt
+import io.legado.app.utils.postEvent
 import io.legado.app.web.HttpServer
 import io.legado.app.web.WebSocketServer
 import kotlinx.coroutines.launch
@@ -54,6 +56,7 @@ class WebService : BaseService() {
         if (webSocketServer?.isAlive == true) {
             webSocketServer?.stop()
         }
+        postEvent(Bus.WEB_SERVICE_STOP, true)
     }
 
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {

app/src/main/java/io/legado/app/ui/about/DonateActivity.kt

@@ -34,10 +34,10 @@ class DonateActivity : BaseActivity(R.layout.activity_donate) {
                 toast(R.string.copy_complete)
             }
         }
-        vw_zfb_hb.setOnClickListener { openActionViewIntent("https://gedoor.github.io/MyBookshelf/zfbhbrwm.png") }
+        vw_zfb_hb.setOnClickListener { openActionViewIntent("https://gitee.com/gekunfei/Donate/raw/master/zfbhbrwm.png") }
-        vw_zfb_rwm.setOnClickListener { openActionViewIntent("https://gedoor.github.io/MyBookshelf/zfbskrwm.jpg") }
+        vw_zfb_rwm.setOnClickListener { openActionViewIntent("https://gitee.com/gekunfei/Donate/raw/master/zfbskrwm.jpg") }
-        vw_wx_rwm.setOnClickListener { openActionViewIntent("https://gedoor.github.io/MyBookshelf/wxskrwm.jpg") }
+        vw_wx_rwm.setOnClickListener { openActionViewIntent("https://gitee.com/gekunfei/Donate/raw/master/wxskrwm.jpg") }
-        vw_qq_rwm.setOnClickListener { openActionViewIntent("https://gedoor.github.io/MyBookshelf/qqskrwm.jpg") }
+        vw_qq_rwm.setOnClickListener { openActionViewIntent("https://gitee.com/gekunfei/Donate/raw/master/qqskrwm.jpg") }
         vw_zfb_hb_ssm.setOnClickListener { getZfbHb(this) }
     }
 
@@ -75,9 +75,12 @@ class DonateActivity : BaseActivity(R.layout.activity_donate) {
 
     private fun aliDonate(context: Context) {
         try {
-            val qrCode = URLEncoder.encode("tsx06677nwdk3javroq4ef0", "utf-8")
+            val qrCode = URLEncoder.encode(
+                "https://qr.alipay.com/tsx06677nwdk3javroq4ef0?_s=Dweb-other",
+                "utf-8"
+            )
             val aliPayQr =
-                "alipayqr://platformapi/startapp?saId=10000007&qrcode=https://qr.alipay.com/$qrCode"
+                "alipayqr://platformapi/startapp?saId=10000007&qrcode=$qrCode&_t=${System.currentTimeMillis()}"
             val intent = Intent(Intent.ACTION_VIEW, Uri.parse(aliPayQr))
             context.startActivity(intent)
         } catch (e: Exception) {

app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt

@@ -16,6 +16,7 @@ import com.jaredrummler.android.colorpicker.ColorPickerDialogListener
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.Bus
+import io.legado.app.constant.PreferKey
 import io.legado.app.constant.Status
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
@@ -203,6 +204,9 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
         return super.dispatchKeyEvent(event)
     }
 
+    /**
+     * 按键事件
+     */
     override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean {
         when (keyCode) {
             KeyEvent.KEYCODE_VOLUME_UP -> {
@@ -217,11 +221,27 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
             }
             KeyEvent.KEYCODE_SPACE -> {
                 page_view.moveToNextPage()
+                return true
+            }
+            getPrefInt(PreferKey.prevKey) -> {
+                if (keyCode != KeyEvent.KEYCODE_UNKNOWN) {
+                    page_view.moveToPrevPage()
+                    return true
+                }
+            }
+            getPrefInt(PreferKey.nextKey) -> {
+                if (keyCode != KeyEvent.KEYCODE_UNKNOWN) {
+                    page_view.moveToNextPage()
+                    return true
+                }
             }
         }
         return super.onKeyDown(keyCode, event)
     }
 
+    /**
+     * 长按事件
+     */
     override fun onKeyLongPress(keyCode: Int, event: KeyEvent?): Boolean {
         when (keyCode) {
             KeyEvent.KEYCODE_BACK -> {
@@ -232,6 +252,9 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
         return super.onKeyLongPress(keyCode, event)
     }
 
+    /**
+     * 松开按键事件
+     */
     override fun onKeyUp(keyCode: Int, event: KeyEvent?): Boolean {
         when (keyCode) {
             KeyEvent.KEYCODE_VOLUME_UP, KeyEvent.KEYCODE_VOLUME_DOWN -> {
@@ -257,6 +280,9 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
         return super.onKeyUp(keyCode, event)
     }
 
+    /**
+     * 音量键翻页
+     */
     private fun volumeKeyPage(direction: PageDelegate.Direction): Boolean {
         if (!read_menu.isVisible) {
             if (getPrefBoolean("volumeKeyPage", true)) {

app/src/main/java/io/legado/app/ui/book/read/config/ReadStyleDialog.kt

@@ -27,7 +27,7 @@ import org.jetbrains.anko.sdk27.listeners.onCheckedChange
 import org.jetbrains.anko.sdk27.listeners.onClick
 import org.jetbrains.anko.sdk27.listeners.onLongClick
 
-class ReadStyleDialog : DialogFragment() {
+class ReadStyleDialog : DialogFragment(), FontSelectDialog.CallBack {
 
     override fun onStart() {
         super.onStart()
@@ -86,17 +86,7 @@ class ReadStyleDialog : DialogFragment() {
             postEvent(Bus.UP_CONFIG, false)
         }
         tv_text_font.onClick {
-            FontSelectDialog(requireContext()).apply {
+            FontSelectDialog().show(childFragmentManager, "fontSelectDialog")
-                curPath = requireContext().getPrefString("readBookFont")
-                defaultFont = {
-                    requireContext().putPrefString("readBookFont", "")
-                    postEvent(Bus.UP_CONFIG, true)
-                }
-                selectFile = {
-                    requireContext().putPrefString("readBookFont", it)
-                    postEvent(Bus.UP_CONFIG, true)
-                }
-            }.show()
         }
         tv_text_indent.onClick {
             selector(
@@ -270,4 +260,12 @@ class ReadStyleDialog : DialogFragment() {
             else -> bg0.borderColor = requireContext().accentColor
         }
     }
+
+    override val curFontPath: String
+        get() = requireContext().getPrefString(PreferKey.readBookFont) ?: ""
+
+    override fun selectFile(path: String) {
+        requireContext().putPrefString(PreferKey.readBookFont, path)
+        postEvent(Bus.UP_CONFIG, true)
+    }
 }

app/src/main/java/io/legado/app/ui/book/read/page/ContentView.kt

@@ -81,7 +81,7 @@ class ContentView : FrameLayout {
                 tv_bottom_right.setTextColor(it)
             }
         }
-        context.getPrefString("readBookFont")?.let {
+        context.getPrefString(PreferKey.readBookFont)?.let {
             if (it.isNotEmpty()) {
                 content_text_view.typeface = Typeface.createFromFile(it)
             } else {

app/src/main/java/io/legado/app/ui/book/read/page/PageView.kt

@@ -9,7 +9,6 @@ import android.widget.FrameLayout
 import io.legado.app.constant.PreferKey
 import io.legado.app.help.ReadBookConfig
 import io.legado.app.service.help.ReadBook
-import io.legado.app.ui.book.read.page.curl.CurlView
 import io.legado.app.ui.book.read.page.delegate.*
 import io.legado.app.utils.activity
 import io.legado.app.utils.getPrefInt
@@ -26,7 +25,6 @@ class PageView(context: Context, attrs: AttributeSet) :
     var prevPage: ContentView? = null
     var curPage: ContentView? = null
     var nextPage: ContentView? = null
-    var curlView: CurlView? = null
 
     init {
         callBack = activity as? CallBack
@@ -91,10 +89,6 @@ class PageView(context: Context, attrs: AttributeSet) :
     }
 
     fun upPageAnim(pageAnim: Int) {
-        if (curlView != null) {
-            removeView(curlView)
-            curlView = null
-        }
         pageDelegate = null
         pageDelegate = when (pageAnim) {
             0 -> CoverPageDelegate(this)

app/src/main/java/io/legado/app/ui/book/read/page/curl/CurlMesh.java

@@ -1,954 +0,0 @@
-package io.legado.app.ui.book.read.page.curl;
-
-import android.graphics.Bitmap;
-import android.graphics.Color;
-import android.graphics.PointF;
-import android.graphics.RectF;
-import android.opengl.GLUtils;
-
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-import java.nio.FloatBuffer;
-
-import javax.microedition.khronos.opengles.GL10;
-
-/**
- * Class implementing actual curl/page rendering.
- *
- * @author harism
- */
-public class CurlMesh {
-
-    // Flag for rendering some lines used for developing. Shows
-    // curl position and one for the direction from the
-    // position given. Comes handy once playing around with different
-    // ways for following pointer.
-    private static final boolean DRAW_CURL_POSITION = false;
-    // Flag for drawing polygon outlines. Using this flag crashes on emulator
-    // due to reason unknown to me. Leaving it here anyway as seeing polygon
-    // outlines gives good insight how original rectangle is divided.
-    private static final boolean DRAW_POLYGON_OUTLINES = false;
-    // Flag for enabling shadow rendering.
-    private static final boolean DRAW_SHADOW = true;
-    // Flag for texture rendering. While this is likely something you
-    // don't want to do it's been used for development purposes as texture
-    // rendering is rather slow on emulator.
-    private static final boolean DRAW_TEXTURE = true;
-
-    // Colors for shadow. Inner one is the color drawn next to surface where
-    // shadowed area starts and outer one is color shadow ends to.
-    private static final float[] SHADOW_INNER_COLOR = {0f, 0f, 0f, .5f};
-    private static final float[] SHADOW_OUTER_COLOR = {0f, 0f, 0f, .0f};
-
-    // Let's avoid using 'new' as much as possible. Meaning we introduce arrays
-    // once here and reuse them on runtime. Doesn't really have very much effect
-    // but avoids some garbage collections from happening.
-    private Array<ShadowVertex> mArrDropShadowVertices;
-    private Array<Vertex> mArrIntersections;
-    private Array<Vertex> mArrOutputVertices;
-    private Array<Vertex> mArrRotatedVertices;
-    private Array<Double> mArrScanLines;
-    private Array<ShadowVertex> mArrSelfShadowVertices;
-    private Array<ShadowVertex> mArrTempShadowVertices;
-    private Array<Vertex> mArrTempVertices;
-
-    // Buffers for feeding rasterizer.
-    private FloatBuffer mBufColors;
-    private FloatBuffer mBufCurlPositionLines;
-    private FloatBuffer mBufShadowColors;
-    private FloatBuffer mBufShadowVertices;
-    private FloatBuffer mBufTexCoords;
-    private FloatBuffer mBufVertices;
-
-    private int mCurlPositionLinesCount;
-    private int mDropShadowCount;
-
-    // Boolean for 'flipping' texture sideways.
-    private boolean mFlipTexture = false;
-    // Maximum number of split lines used for creating a curl.
-    private int mMaxCurlSplits;
-
-    // Bounding rectangle for this mesh. mRectagle[0] = top-left corner,
-    // mRectangle[1] = bottom-left, mRectangle[2] = top-right and mRectangle[3]
-    // bottom-right.
-    private final Vertex[] mRectangle = new Vertex[4];
-    private int mSelfShadowCount;
-
-    private boolean mTextureBack = false;
-    // Texture ids and other variables.
-    private int[] mTextureIds = null;
-    private final CurlPage mTexturePage = new CurlPage();
-    private final RectF mTextureRectBack = new RectF();
-    private final RectF mTextureRectFront = new RectF();
-
-    private int mVerticesCountBack;
-    private int mVerticesCountFront;
-
-    /**
-     * Constructor for mesh object.
-     *
-     * @param maxCurlSplits Maximum number curl can be divided into. The bigger the value
-     *                      the smoother curl will be. With the cost of having more
-     *                      polygons for drawing.
-     */
-    public CurlMesh(int maxCurlSplits) {
-        // There really is no use for 0 splits.
-        mMaxCurlSplits = maxCurlSplits < 1 ? 1 : maxCurlSplits;
-
-        mArrScanLines = new Array<>(maxCurlSplits + 2);
-        mArrOutputVertices = new Array<>(7);
-        mArrRotatedVertices = new Array<>(4);
-        mArrIntersections = new Array<>(2);
-        mArrTempVertices = new Array<>(7 + 4);
-        for (int i = 0; i < 7 + 4; ++i) {
-            mArrTempVertices.add(new Vertex());
-        }
-
-        if (DRAW_SHADOW) {
-            mArrSelfShadowVertices = new Array<>(
-                    (mMaxCurlSplits + 2) * 2);
-            mArrDropShadowVertices = new Array<>(
-                    (mMaxCurlSplits + 2) * 2);
-            mArrTempShadowVertices = new Array<>(
-                    (mMaxCurlSplits + 2) * 2);
-            for (int i = 0; i < (mMaxCurlSplits + 2) * 2; ++i) {
-                mArrTempShadowVertices.add(new ShadowVertex());
-            }
-        }
-
-        // Rectangle consists of 4 vertices. Index 0 = top-left, index 1 =
-        // bottom-left, index 2 = top-right and index 3 = bottom-right.
-        for (int i = 0; i < 4; ++i) {
-            mRectangle[i] = new Vertex();
-        }
-        // Set up shadow penumbra direction to each vertex. We do fake 'self
-        // shadow' calculations based on this information.
-        mRectangle[0].mPenumbraX = mRectangle[1].mPenumbraX = mRectangle[1].mPenumbraY = mRectangle[3].mPenumbraY = -1;
-        mRectangle[0].mPenumbraY = mRectangle[2].mPenumbraX = mRectangle[2].mPenumbraY = mRectangle[3].mPenumbraX = 1;
-
-        if (DRAW_CURL_POSITION) {
-            mCurlPositionLinesCount = 3;
-            ByteBuffer hvbb = ByteBuffer
-                    .allocateDirect(mCurlPositionLinesCount * 2 * 2 * 4);
-            hvbb.order(ByteOrder.nativeOrder());
-            mBufCurlPositionLines = hvbb.asFloatBuffer();
-            mBufCurlPositionLines.position(0);
-        }
-
-        // There are 4 vertices from bounding rect, max 2 from adding split line
-        // to two corners and curl consists of max mMaxCurlSplits lines each
-        // outputting 2 vertices.
-        int maxVerticesCount = 4 + 2 + (2 * mMaxCurlSplits);
-        ByteBuffer vbb = ByteBuffer.allocateDirect(maxVerticesCount * 3 * 4);
-        vbb.order(ByteOrder.nativeOrder());
-        mBufVertices = vbb.asFloatBuffer();
-        mBufVertices.position(0);
-
-        if (DRAW_TEXTURE) {
-            ByteBuffer tbb = ByteBuffer
-                    .allocateDirect(maxVerticesCount * 2 * 4);
-            tbb.order(ByteOrder.nativeOrder());
-            mBufTexCoords = tbb.asFloatBuffer();
-            mBufTexCoords.position(0);
-        }
-
-        ByteBuffer cbb = ByteBuffer.allocateDirect(maxVerticesCount * 4 * 4);
-        cbb.order(ByteOrder.nativeOrder());
-        mBufColors = cbb.asFloatBuffer();
-        mBufColors.position(0);
-
-        if (DRAW_SHADOW) {
-            int maxShadowVerticesCount = (mMaxCurlSplits + 2) * 2 * 2;
-            ByteBuffer scbb = ByteBuffer
-                    .allocateDirect(maxShadowVerticesCount * 4 * 4);
-            scbb.order(ByteOrder.nativeOrder());
-            mBufShadowColors = scbb.asFloatBuffer();
-            mBufShadowColors.position(0);
-
-            ByteBuffer sibb = ByteBuffer
-                    .allocateDirect(maxShadowVerticesCount * 3 * 4);
-            sibb.order(ByteOrder.nativeOrder());
-            mBufShadowVertices = sibb.asFloatBuffer();
-            mBufShadowVertices.position(0);
-
-            mDropShadowCount = mSelfShadowCount = 0;
-        }
-    }
-
-    /**
-     * Adds vertex to buffers.
-     */
-    private void addVertex(Vertex vertex) {
-        mBufVertices.put((float) vertex.mPosX);
-        mBufVertices.put((float) vertex.mPosY);
-        mBufVertices.put((float) vertex.mPosZ);
-        mBufColors.put(vertex.mColorFactor * Color.red(vertex.mColor) / 255f);
-        mBufColors.put(vertex.mColorFactor * Color.green(vertex.mColor) / 255f);
-        mBufColors.put(vertex.mColorFactor * Color.blue(vertex.mColor) / 255f);
-        mBufColors.put(Color.alpha(vertex.mColor) / 255f);
-        if (DRAW_TEXTURE) {
-            mBufTexCoords.put((float) vertex.mTexX);
-            mBufTexCoords.put((float) vertex.mTexY);
-        }
-    }
-
-    /**
-     * Sets curl for this mesh.
-     *
-     * @param curlPos Position for curl 'center'. Can be any point on line collinear
-     *                to curl.
-     * @param curlDir Curl direction, should be normalized.
-     * @param radius  Radius of curl.
-     */
-    public synchronized void curl(PointF curlPos, PointF curlDir, double radius) {
-
-        // First add some 'helper' lines used for development.
-        if (DRAW_CURL_POSITION) {
-            mBufCurlPositionLines.position(0);
-
-            mBufCurlPositionLines.put(curlPos.x);
-            mBufCurlPositionLines.put(curlPos.y - 1.0f);
-            mBufCurlPositionLines.put(curlPos.x);
-            mBufCurlPositionLines.put(curlPos.y + 1.0f);
-            mBufCurlPositionLines.put(curlPos.x - 1.0f);
-            mBufCurlPositionLines.put(curlPos.y);
-            mBufCurlPositionLines.put(curlPos.x + 1.0f);
-            mBufCurlPositionLines.put(curlPos.y);
-
-            mBufCurlPositionLines.put(curlPos.x);
-            mBufCurlPositionLines.put(curlPos.y);
-            mBufCurlPositionLines.put(curlPos.x + curlDir.x * 2);
-            mBufCurlPositionLines.put(curlPos.y + curlDir.y * 2);
-
-            mBufCurlPositionLines.position(0);
-        }
-
-        // Actual 'curl' implementation starts here.
-        mBufVertices.position(0);
-        mBufColors.position(0);
-        if (DRAW_TEXTURE) {
-            mBufTexCoords.position(0);
-        }
-
-        // Calculate curl angle from direction.
-        double curlAngle = Math.acos(curlDir.x);
-        curlAngle = curlDir.y > 0 ? -curlAngle : curlAngle;
-
-        // Initiate rotated rectangle which's is translated to curlPos and
-        // rotated so that curl direction heads to right (1,0). Vertices are
-        // ordered in ascending order based on x -coordinate at the same time.
-        // And using y -coordinate in very rare case in which two vertices have
-        // same x -coordinate.
-        mArrTempVertices.addAll(mArrRotatedVertices);
-        mArrRotatedVertices.clear();
-        for (int i = 0; i < 4; ++i) {
-            Vertex v = mArrTempVertices.remove(0);
-            v.set(mRectangle[i]);
-            v.translate(-curlPos.x, -curlPos.y);
-            v.rotateZ(-curlAngle);
-            int j = 0;
-            for (; j < mArrRotatedVertices.size(); ++j) {
-                Vertex v2 = mArrRotatedVertices.get(j);
-                if (v.mPosX > v2.mPosX) {
-                    break;
-                }
-                if (v.mPosX == v2.mPosX && v.mPosY > v2.mPosY) {
-                    break;
-                }
-            }
-            mArrRotatedVertices.add(j, v);
-        }
-
-        // Rotated rectangle lines/vertex indices. We need to find bounding
-        // lines for rotated rectangle. After sorting vertices according to
-        // their x -coordinate we don't have to worry about vertices at indices
-        // 0 and 1. But due to inaccuracy it's possible vertex 3 is not the
-        // opposing corner from vertex 0. So we are calculating distance from
-        // vertex 0 to vertices 2 and 3 - and altering line indices if needed.
-        // Also vertices/lines are given in an order first one has x -coordinate
-        // at least the latter one. This property is used in getIntersections to
-        // see if there is an intersection.
-        int[][] lines = {{0, 1}, {0, 2}, {1, 3}, {2, 3}};
-        {
-            // TODO: There really has to be more 'easier' way of doing this -
-            // not including extensive use of sqrt.
-            Vertex v0 = mArrRotatedVertices.get(0);
-            Vertex v2 = mArrRotatedVertices.get(2);
-            Vertex v3 = mArrRotatedVertices.get(3);
-            double dist2 = Math.sqrt((v0.mPosX - v2.mPosX)
-                    * (v0.mPosX - v2.mPosX) + (v0.mPosY - v2.mPosY)
-                    * (v0.mPosY - v2.mPosY));
-            double dist3 = Math.sqrt((v0.mPosX - v3.mPosX)
-                    * (v0.mPosX - v3.mPosX) + (v0.mPosY - v3.mPosY)
-                    * (v0.mPosY - v3.mPosY));
-            if (dist2 > dist3) {
-                lines[1][1] = 3;
-                lines[2][1] = 2;
-            }
-        }
-
-        mVerticesCountFront = mVerticesCountBack = 0;
-
-        if (DRAW_SHADOW) {
-            mArrTempShadowVertices.addAll(mArrDropShadowVertices);
-            mArrTempShadowVertices.addAll(mArrSelfShadowVertices);
-            mArrDropShadowVertices.clear();
-            mArrSelfShadowVertices.clear();
-        }
-
-        // Length of 'curl' curve.
-        double curlLength = Math.PI * radius;
-        // Calculate scan lines.
-        // TODO: Revisit this code one day. There is room for optimization here.
-        mArrScanLines.clear();
-        if (mMaxCurlSplits > 0) {
-            mArrScanLines.add((double) 0);
-        }
-        for (int i = 1; i < mMaxCurlSplits; ++i) {
-            mArrScanLines.add((-curlLength * i) / (mMaxCurlSplits - 1));
-        }
-        // As mRotatedVertices is ordered regarding x -coordinate, adding
-        // this scan line produces scan area picking up vertices which are
-        // rotated completely. One could say 'until infinity'.
-        mArrScanLines.add(mArrRotatedVertices.get(3).mPosX - 1);
-
-        // Start from right most vertex. Pretty much the same as first scan area
-        // is starting from 'infinity'.
-        double scanXmax = mArrRotatedVertices.get(0).mPosX + 1;
-
-        for (int i = 0; i < mArrScanLines.size(); ++i) {
-            // Once we have scanXmin and scanXmax we have a scan area to start
-            // working with.
-            double scanXmin = mArrScanLines.get(i);
-            // First iterate 'original' rectangle vertices within scan area.
-            for (int j = 0; j < mArrRotatedVertices.size(); ++j) {
-                Vertex v = mArrRotatedVertices.get(j);
-                // Test if vertex lies within this scan area.
-                // TODO: Frankly speaking, can't remember why equality check was
-                // added to both ends. Guessing it was somehow related to case
-                // where radius=0f, which, given current implementation, could
-                // be handled much more effectively anyway.
-                if (v.mPosX >= scanXmin && v.mPosX <= scanXmax) {
-                    // Pop out a vertex from temp vertices.
-                    Vertex n = mArrTempVertices.remove(0);
-                    n.set(v);
-                    // This is done solely for triangulation reasons. Given a
-                    // rotated rectangle it has max 2 vertices having
-                    // intersection.
-                    Array<Vertex> intersections = getIntersections(
-                            mArrRotatedVertices, lines, n.mPosX);
-                    // In a sense one could say we're adding vertices always in
-                    // two, positioned at the ends of intersecting line. And for
-                    // triangulation to work properly they are added based on y
-                    // -coordinate. And this if-else is doing it for us.
-                    if (intersections.size() == 1
-                            && intersections.get(0).mPosY > v.mPosY) {
-                        // In case intersecting vertex is higher add it first.
-                        mArrOutputVertices.addAll(intersections);
-                        mArrOutputVertices.add(n);
-                    } else if (intersections.size() <= 1) {
-                        // Otherwise add original vertex first.
-                        mArrOutputVertices.add(n);
-                        mArrOutputVertices.addAll(intersections);
-                    } else {
-                        // There should never be more than 1 intersecting
-                        // vertex. But if it happens as a fallback simply skip
-                        // everything.
-                        mArrTempVertices.add(n);
-                        mArrTempVertices.addAll(intersections);
-                    }
-                }
-            }
-
-            // Search for scan line intersections.
-            Array<Vertex> intersections = getIntersections(mArrRotatedVertices,
-                    lines, scanXmin);
-
-            // We expect to get 0 or 2 vertices. In rare cases there's only one
-            // but in general given a scan line intersecting rectangle there
-            // should be 2 intersecting vertices.
-            if (intersections.size() == 2) {
-                // There were two intersections, add them based on y
-                // -coordinate, higher first, lower last.
-                Vertex v1 = intersections.get(0);
-                Vertex v2 = intersections.get(1);
-                if (v1.mPosY < v2.mPosY) {
-                    mArrOutputVertices.add(v2);
-                    mArrOutputVertices.add(v1);
-                } else {
-                    mArrOutputVertices.addAll(intersections);
-                }
-            } else if (intersections.size() != 0) {
-                // This happens in a case in which there is a original vertex
-                // exactly at scan line or something went very much wrong if
-                // there are 3+ vertices. What ever the reason just return the
-                // vertices to temp vertices for later use. In former case it
-                // was handled already earlier once iterating through
-                // mRotatedVertices, in latter case it's better to avoid doing
-                // anything with them.
-                mArrTempVertices.addAll(intersections);
-            }
-
-            // Add vertices found during this iteration to vertex etc buffers.
-            while (mArrOutputVertices.size() > 0) {
-                Vertex v = mArrOutputVertices.remove(0);
-                mArrTempVertices.add(v);
-
-                // Local texture front-facing flag.
-                boolean textureFront;
-
-                // Untouched vertices.
-                if (i == 0) {
-                    textureFront = true;
-                    mVerticesCountFront++;
-                }
-                // 'Completely' rotated vertices.
-                else if (i == mArrScanLines.size() - 1 || curlLength == 0) {
-                    v.mPosX = -(curlLength + v.mPosX);
-                    v.mPosZ = 2 * radius;
-                    v.mPenumbraX = -v.mPenumbraX;
-
-                    textureFront = false;
-                    mVerticesCountBack++;
-                }
-                // Vertex lies within 'curl'.
-                else {
-                    // Even though it's not obvious from the if-else clause,
-                    // here v.mPosX is between [-curlLength, 0]. And we can do
-                    // calculations around a half cylinder.
-                    double rotY = Math.PI * (v.mPosX / curlLength);
-                    v.mPosX = radius * Math.sin(rotY);
-                    v.mPosZ = radius - (radius * Math.cos(rotY));
-                    v.mPenumbraX *= Math.cos(rotY);
-                    // Map color multiplier to [.1f, 1f] range.
-                    v.mColorFactor = (float) (.1f + .9f * Math.sqrt(Math
-                            .sin(rotY) + 1));
-
-                    if (v.mPosZ >= radius) {
-                        textureFront = false;
-                        mVerticesCountBack++;
-                    } else {
-                        textureFront = true;
-                        mVerticesCountFront++;
-                    }
-                }
-
-                // We use local textureFront for flipping backside texture
-                // locally. Plus additionally if mesh is in flip texture mode,
-                // we'll make the procedure "backwards". Also, until this point,
-                // texture coordinates are within [0, 1] range so we'll adjust
-                // them to final texture coordinates too.
-                if (textureFront != mFlipTexture) {
-                    v.mTexX *= mTextureRectFront.right;
-                    v.mTexY *= mTextureRectFront.bottom;
-                    v.mColor = mTexturePage.getColor(CurlPage.SIDE_FRONT);
-                } else {
-                    v.mTexX *= mTextureRectBack.right;
-                    v.mTexY *= mTextureRectBack.bottom;
-                    v.mColor = mTexturePage.getColor(CurlPage.SIDE_BACK);
-                }
-
-                // Move vertex back to 'world' coordinates.
-                v.rotateZ(curlAngle);
-                v.translate(curlPos.x, curlPos.y);
-                addVertex(v);
-
-                // Drop shadow is cast 'behind' the curl.
-                if (DRAW_SHADOW && v.mPosZ > 0 && v.mPosZ <= radius) {
-                    ShadowVertex sv = mArrTempShadowVertices.remove(0);
-                    sv.mPosX = v.mPosX;
-                    sv.mPosY = v.mPosY;
-                    sv.mPosZ = v.mPosZ;
-                    sv.mPenumbraX = (v.mPosZ / 2) * -curlDir.x;
-                    sv.mPenumbraY = (v.mPosZ / 2) * -curlDir.y;
-                    sv.mPenumbraColor = v.mPosZ / radius;
-                    int idx = (mArrDropShadowVertices.size() + 1) / 2;
-                    mArrDropShadowVertices.add(idx, sv);
-                }
-                // Self shadow is cast partly over mesh.
-                if (DRAW_SHADOW && v.mPosZ > radius) {
-                    ShadowVertex sv = mArrTempShadowVertices.remove(0);
-                    sv.mPosX = v.mPosX;
-                    sv.mPosY = v.mPosY;
-                    sv.mPosZ = v.mPosZ;
-                    sv.mPenumbraX = ((v.mPosZ - radius) / 3) * v.mPenumbraX;
-                    sv.mPenumbraY = ((v.mPosZ - radius) / 3) * v.mPenumbraY;
-                    sv.mPenumbraColor = (v.mPosZ - radius) / (2 * radius);
-                    int idx = (mArrSelfShadowVertices.size() + 1) / 2;
-                    mArrSelfShadowVertices.add(idx, sv);
-                }
-            }
-
-            // Switch scanXmin as scanXmax for next iteration.
-            scanXmax = scanXmin;
-        }
-
-        mBufVertices.position(0);
-        mBufColors.position(0);
-        if (DRAW_TEXTURE) {
-            mBufTexCoords.position(0);
-        }
-
-        // Add shadow Vertices.
-        if (DRAW_SHADOW) {
-            mBufShadowColors.position(0);
-            mBufShadowVertices.position(0);
-            mDropShadowCount = 0;
-
-            for (int i = 0; i < mArrDropShadowVertices.size(); ++i) {
-                ShadowVertex sv = mArrDropShadowVertices.get(i);
-                mBufShadowVertices.put((float) sv.mPosX);
-                mBufShadowVertices.put((float) sv.mPosY);
-                mBufShadowVertices.put((float) sv.mPosZ);
-                mBufShadowVertices.put((float) (sv.mPosX + sv.mPenumbraX));
-                mBufShadowVertices.put((float) (sv.mPosY + sv.mPenumbraY));
-                mBufShadowVertices.put((float) sv.mPosZ);
-                for (int j = 0; j < 4; ++j) {
-                    double color = SHADOW_OUTER_COLOR[j]
-                            + (SHADOW_INNER_COLOR[j] - SHADOW_OUTER_COLOR[j])
-                            * sv.mPenumbraColor;
-                    mBufShadowColors.put((float) color);
-                }
-                mBufShadowColors.put(SHADOW_OUTER_COLOR);
-                mDropShadowCount += 2;
-            }
-            mSelfShadowCount = 0;
-            for (int i = 0; i < mArrSelfShadowVertices.size(); ++i) {
-                ShadowVertex sv = mArrSelfShadowVertices.get(i);
-                mBufShadowVertices.put((float) sv.mPosX);
-                mBufShadowVertices.put((float) sv.mPosY);
-                mBufShadowVertices.put((float) sv.mPosZ);
-                mBufShadowVertices.put((float) (sv.mPosX + sv.mPenumbraX));
-                mBufShadowVertices.put((float) (sv.mPosY + sv.mPenumbraY));
-                mBufShadowVertices.put((float) sv.mPosZ);
-                for (int j = 0; j < 4; ++j) {
-                    double color = SHADOW_OUTER_COLOR[j]
-                            + (SHADOW_INNER_COLOR[j] - SHADOW_OUTER_COLOR[j])
-                            * sv.mPenumbraColor;
-                    mBufShadowColors.put((float) color);
-                }
-                mBufShadowColors.put(SHADOW_OUTER_COLOR);
-                mSelfShadowCount += 2;
-            }
-            mBufShadowColors.position(0);
-            mBufShadowVertices.position(0);
-        }
-    }
-
-    /**
-     * Calculates intersections for given scan line.
-     */
-    private Array<Vertex> getIntersections(Array<Vertex> vertices,
-                                           int[][] lineIndices, double scanX) {
-        mArrIntersections.clear();
-        // Iterate through rectangle lines each re-presented as a pair of
-        // vertices.
-        for (int[] lineIndex : lineIndices) {
-            Vertex v1 = vertices.get(lineIndex[0]);
-            Vertex v2 = vertices.get(lineIndex[1]);
-            // Here we expect that v1.mPosX >= v2.mPosX and wont do intersection
-            // test the opposite way.
-            if (v1.mPosX > scanX && v2.mPosX < scanX) {
-                // There is an intersection, calculate coefficient telling 'how
-                // far' scanX is from v2.
-                double c = (scanX - v2.mPosX) / (v1.mPosX - v2.mPosX);
-                Vertex n = mArrTempVertices.remove(0);
-                n.set(v2);
-                n.mPosX = scanX;
-                n.mPosY += (v1.mPosY - v2.mPosY) * c;
-                if (DRAW_TEXTURE) {
-                    n.mTexX += (v1.mTexX - v2.mTexX) * c;
-                    n.mTexY += (v1.mTexY - v2.mTexY) * c;
-                }
-                if (DRAW_SHADOW) {
-                    n.mPenumbraX += (v1.mPenumbraX - v2.mPenumbraX) * c;
-                    n.mPenumbraY += (v1.mPenumbraY - v2.mPenumbraY) * c;
-                }
-                mArrIntersections.add(n);
-            }
-        }
-        return mArrIntersections;
-    }
-
-    /**
-     * Getter for textures page for this mesh.
-     */
-    public synchronized CurlPage getTexturePage() {
-        return mTexturePage;
-    }
-
-    /**
-     * Renders our page curl mesh.
-     */
-    public synchronized void onDrawFrame(GL10 gl) {
-        // First allocate texture if there is not one yet.
-        if (DRAW_TEXTURE && mTextureIds == null) {
-            // Generate texture.
-            mTextureIds = new int[2];
-            gl.glGenTextures(2, mTextureIds, 0);
-            for (int textureId : mTextureIds) {
-                // Set texture attributes.
-                gl.glBindTexture(GL10.GL_TEXTURE_2D, textureId);
-                gl.glTexParameterf(GL10.GL_TEXTURE_2D,
-                        GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_NEAREST);
-                gl.glTexParameterf(GL10.GL_TEXTURE_2D,
-                        GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_NEAREST);
-                gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S,
-                        GL10.GL_CLAMP_TO_EDGE);
-                gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T,
-                        GL10.GL_CLAMP_TO_EDGE);
-            }
-        }
-
-        if (DRAW_TEXTURE && mTexturePage.getTexturesChanged()) {
-            gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureIds[0]);
-            Bitmap texture = mTexturePage.getTexture(mTextureRectFront,
-                    CurlPage.SIDE_FRONT);
-            GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, texture, 0);
-            texture.recycle();
-
-            mTextureBack = mTexturePage.hasBackTexture();
-            if (mTextureBack) {
-                gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureIds[1]);
-                texture = mTexturePage.getTexture(mTextureRectBack,
-                        CurlPage.SIDE_BACK);
-                GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, texture, 0);
-                texture.recycle();
-            } else {
-                mTextureRectBack.set(mTextureRectFront);
-            }
-
-            mTexturePage.recycle();
-            reset();
-        }
-
-        // Some 'global' settings.
-        gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
-
-        // TODO: Drop shadow drawing is done temporarily here to hide some
-        // problems with its calculation.
-        if (DRAW_SHADOW) {
-            gl.glDisable(GL10.GL_TEXTURE_2D);
-            gl.glEnable(GL10.GL_BLEND);
-            gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
-            gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
-            gl.glColorPointer(4, GL10.GL_FLOAT, 0, mBufShadowColors);
-            gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mBufShadowVertices);
-            gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, mDropShadowCount);
-            gl.glDisableClientState(GL10.GL_COLOR_ARRAY);
-            gl.glDisable(GL10.GL_BLEND);
-        }
-
-        if (DRAW_TEXTURE) {
-            gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
-            gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, mBufTexCoords);
-        }
-        gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mBufVertices);
-        // Enable color array.
-        gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
-        gl.glColorPointer(4, GL10.GL_FLOAT, 0, mBufColors);
-
-        // Draw front facing blank vertices.
-        gl.glDisable(GL10.GL_TEXTURE_2D);
-        gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, mVerticesCountFront);
-
-        // Draw front facing texture.
-        if (DRAW_TEXTURE) {
-            gl.glEnable(GL10.GL_BLEND);
-            gl.glEnable(GL10.GL_TEXTURE_2D);
-
-            if (!mFlipTexture || !mTextureBack) {
-                gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureIds[0]);
-            } else {
-                gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureIds[1]);
-            }
-
-            gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
-            gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, mVerticesCountFront);
-
-            gl.glDisable(GL10.GL_BLEND);
-            gl.glDisable(GL10.GL_TEXTURE_2D);
-        }
-
-        int backStartIdx = Math.max(0, mVerticesCountFront - 2);
-        int backCount = mVerticesCountFront + mVerticesCountBack - backStartIdx;
-
-        // Draw back facing blank vertices.
-        gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, backStartIdx, backCount);
-
-        // Draw back facing texture.
-        if (DRAW_TEXTURE) {
-            gl.glEnable(GL10.GL_BLEND);
-            gl.glEnable(GL10.GL_TEXTURE_2D);
-
-            if (mFlipTexture || !mTextureBack) {
-                gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureIds[0]);
-            } else {
-                gl.glBindTexture(GL10.GL_TEXTURE_2D, mTextureIds[1]);
-            }
-
-            gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
-            gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, backStartIdx, backCount);
-
-            gl.glDisable(GL10.GL_BLEND);
-            gl.glDisable(GL10.GL_TEXTURE_2D);
-        }
-
-        // Disable textures and color array.
-        gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
-        gl.glDisableClientState(GL10.GL_COLOR_ARRAY);
-
-        if (DRAW_POLYGON_OUTLINES) {
-            gl.glEnable(GL10.GL_BLEND);
-            gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
-            gl.glLineWidth(1.0f);
-            gl.glColor4f(0.5f, 0.5f, 1.0f, 1.0f);
-            gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mBufVertices);
-            gl.glDrawArrays(GL10.GL_LINE_STRIP, 0, mVerticesCountFront);
-            gl.glDisable(GL10.GL_BLEND);
-        }
-
-        if (DRAW_CURL_POSITION) {
-            gl.glEnable(GL10.GL_BLEND);
-            gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
-            gl.glLineWidth(1.0f);
-            gl.glColor4f(1.0f, 0.5f, 0.5f, 1.0f);
-            gl.glVertexPointer(2, GL10.GL_FLOAT, 0, mBufCurlPositionLines);
-            gl.glDrawArrays(GL10.GL_LINES, 0, mCurlPositionLinesCount * 2);
-            gl.glDisable(GL10.GL_BLEND);
-        }
-
-        if (DRAW_SHADOW) {
-            gl.glEnable(GL10.GL_BLEND);
-            gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
-            gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
-            gl.glColorPointer(4, GL10.GL_FLOAT, 0, mBufShadowColors);
-            gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mBufShadowVertices);
-            gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, mDropShadowCount,
-                    mSelfShadowCount);
-            gl.glDisableClientState(GL10.GL_COLOR_ARRAY);
-            gl.glDisable(GL10.GL_BLEND);
-        }
-
-        gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
-    }
-
-    /**
-     * Resets mesh to 'initial' state. Meaning this mesh will draw a plain
-     * textured rectangle after call to this method.
-     */
-    public synchronized void reset() {
-        mBufVertices.position(0);
-        mBufColors.position(0);
-        if (DRAW_TEXTURE) {
-            mBufTexCoords.position(0);
-        }
-        for (int i = 0; i < 4; ++i) {
-            Vertex tmp = mArrTempVertices.get(0);
-            tmp.set(mRectangle[i]);
-
-            if (mFlipTexture) {
-                tmp.mTexX *= mTextureRectBack.right;
-                tmp.mTexY *= mTextureRectBack.bottom;
-                tmp.mColor = mTexturePage.getColor(CurlPage.SIDE_BACK);
-            } else {
-                tmp.mTexX *= mTextureRectFront.right;
-                tmp.mTexY *= mTextureRectFront.bottom;
-                tmp.mColor = mTexturePage.getColor(CurlPage.SIDE_FRONT);
-            }
-
-            addVertex(tmp);
-        }
-        mVerticesCountFront = 4;
-        mVerticesCountBack = 0;
-        mBufVertices.position(0);
-        mBufColors.position(0);
-        if (DRAW_TEXTURE) {
-            mBufTexCoords.position(0);
-        }
-
-        mDropShadowCount = mSelfShadowCount = 0;
-    }
-
-    /**
-     * Resets allocated texture id forcing creation of new one. After calling
-     * this method you most likely want to set bitmap too as it's lost. This
-     * method should be called only once e.g GL context is re-created as this
-     * method does not release previous texture id, only makes sure new one is
-     * requested on next render.
-     */
-    public synchronized void resetTexture() {
-        mTextureIds = null;
-    }
-
-    /**
-     * If true, flips texture sideways.
-     */
-    public synchronized void setFlipTexture(boolean flipTexture) {
-        mFlipTexture = flipTexture;
-        if (flipTexture) {
-            setTexCoords(1f, 0f, 0f, 1f);
-        } else {
-            setTexCoords(0f, 0f, 1f, 1f);
-        }
-    }
-
-    /**
-     * Update mesh bounds.
-     */
-    public void setRect(RectF r) {
-        mRectangle[0].mPosX = r.left;
-        mRectangle[0].mPosY = r.top;
-        mRectangle[1].mPosX = r.left;
-        mRectangle[1].mPosY = r.bottom;
-        mRectangle[2].mPosX = r.right;
-        mRectangle[2].mPosY = r.top;
-        mRectangle[3].mPosX = r.right;
-        mRectangle[3].mPosY = r.bottom;
-    }
-
-    /**
-     * Sets texture coordinates to mRectangle vertices.
-     */
-    private synchronized void setTexCoords(float left, float top, float right,
-                                           float bottom) {
-        mRectangle[0].mTexX = left;
-        mRectangle[0].mTexY = top;
-        mRectangle[1].mTexX = left;
-        mRectangle[1].mTexY = bottom;
-        mRectangle[2].mTexX = right;
-        mRectangle[2].mTexY = top;
-        mRectangle[3].mTexX = right;
-        mRectangle[3].mTexY = bottom;
-    }
-
-    /**
-     * Simple fixed size array implementation.
-     */
-    private class Array<T> {
-        private Object[] mArray;
-        private int mCapacity;
-        private int mSize;
-
-        Array(int capacity) {
-            mCapacity = capacity;
-            mArray = new Object[capacity];
-        }
-
-        public void add(int index, T item) {
-            if (index < 0 || index > mSize || mSize >= mCapacity) {
-                throw new IndexOutOfBoundsException();
-            }
-            System.arraycopy(mArray, index, mArray, index + 1, mSize - index);
-            mArray[index] = item;
-            ++mSize;
-        }
-
-        public void add(T item) {
-            if (mSize >= mCapacity) {
-                throw new IndexOutOfBoundsException();
-            }
-            mArray[mSize++] = item;
-        }
-
-        public void addAll(Array<T> array) {
-            if (mSize + array.size() > mCapacity) {
-                throw new IndexOutOfBoundsException();
-            }
-            for (int i = 0; i < array.size(); ++i) {
-                mArray[mSize++] = array.get(i);
-            }
-        }
-
-        public void clear() {
-            mSize = 0;
-        }
-
-        @SuppressWarnings("unchecked")
-        public T get(int index) {
-            if (index < 0 || index >= mSize) {
-                throw new IndexOutOfBoundsException();
-            }
-            return (T) mArray[index];
-        }
-
-        @SuppressWarnings("unchecked")
-        public T remove(int index) {
-            if (index < 0 || index >= mSize) {
-                throw new IndexOutOfBoundsException();
-            }
-            T item = (T) mArray[index];
-            if (mSize - 1 - index >= 0)
-                System.arraycopy(mArray, index + 1, mArray, index, mSize - 1 - index);
-            --mSize;
-            return item;
-        }
-
-        public int size() {
-            return mSize;
-        }
-
-    }
-
-    /**
-     * Holder for shadow vertex information.
-     */
-    private class ShadowVertex {
-        double mPenumbraColor;
-        double mPenumbraX;
-        double mPenumbraY;
-        double mPosX;
-        double mPosY;
-        double mPosZ;
-    }
-
-    /**
-     * Holder for vertex information.
-     */
-    private class Vertex {
-        int mColor;
-        float mColorFactor;
-        double mPenumbraX;
-        double mPenumbraY;
-        double mPosX;
-        double mPosY;
-        double mPosZ;
-        double mTexX;
-        double mTexY;
-
-        Vertex() {
-            mPosX = mPosY = mPosZ = mTexX = mTexY = 0;
-            mColorFactor = 1.0f;
-        }
-
-        void rotateZ(double theta) {
-            double cos = Math.cos(theta);
-            double sin = Math.sin(theta);
-            double x = mPosX * cos + mPosY * sin;
-            double y = mPosX * -sin + mPosY * cos;
-            mPosX = x;
-            mPosY = y;
-            double px = mPenumbraX * cos + mPenumbraY * sin;
-            double py = mPenumbraX * -sin + mPenumbraY * cos;
-            mPenumbraX = px;
-            mPenumbraY = py;
-        }
-
-        public void set(Vertex vertex) {
-            mPosX = vertex.mPosX;
-            mPosY = vertex.mPosY;
-            mPosZ = vertex.mPosZ;
-            mTexX = vertex.mTexX;
-            mTexY = vertex.mTexY;
-            mPenumbraX = vertex.mPenumbraX;
-            mPenumbraY = vertex.mPenumbraY;
-            mColor = vertex.mColor;
-            mColorFactor = vertex.mColorFactor;
-        }
-
-        public void translate(double dx, double dy) {
-            mPosX += dx;
-            mPosY += dy;
-        }
-    }
-}

app/src/main/java/io/legado/app/ui/book/read/page/curl/CurlPage.kt

@@ -1,191 +0,0 @@
-package io.legado.app.ui.book.read.page.curl
-
-import android.graphics.Bitmap
-import android.graphics.Canvas
-import android.graphics.Color
-import android.graphics.RectF
-
-/**
- * Storage class for page textures, blend colors and possibly some other values
- * in the future.
- *
- * @author harism
- */
-class CurlPage {
-
-    private var mColorBack: Int = 0
-    private var mColorFront: Int = 0
-    private var mTextureBack: Bitmap? = null
-    private var mTextureFront: Bitmap? = null
-    /**
-     * Returns true if textures have changed.
-     */
-    var texturesChanged: Boolean = false
-        private set
-
-    /**
-     * Default constructor.
-     */
-    init {
-        reset()
-    }
-
-    /**
-     * Getter for color.
-     */
-    fun getColor(side: Int): Int {
-        return when (side) {
-            SIDE_FRONT -> mColorFront
-            else -> mColorBack
-        }
-    }
-
-    /**
-     * Calculates the next highest power of two for a given integer.
-     */
-    private fun getNextHighestPO2(n: Int): Int {
-        var n1 = n
-        n1 -= 1
-        n1 = n1 or (n1 shr 1)
-        n1 = n1 or (n1 shr 2)
-        n1 = n1 or (n1 shr 4)
-        n1 = n1 or (n1 shr 8)
-        n1 = n1 or (n1 shr 16)
-        n1 = n1 or (n1 shr 32)
-        return n1 + 1
-    }
-
-    /**
-     * Generates nearest power of two sized Bitmap for give Bitmap. Returns this
-     * new Bitmap using default return statement + original texture coordinates
-     * are stored into RectF.
-     */
-    private fun getTexture(bitmap: Bitmap, textureRect: RectF): Bitmap {
-        // Bitmap original size.
-        val w = bitmap.width
-        val h = bitmap.height
-        // Bitmap size expanded to next power of two. This is done due to
-        // the requirement on many devices, texture width and height should
-        // be power of two.
-        val newW = getNextHighestPO2(w)
-        val newH = getNextHighestPO2(h)
-
-        // TODO: Is there another way to create a bigger Bitmap and copy
-        // original Bitmap to it more efficiently? Immutable bitmap anyone?
-        val bitmapTex = Bitmap.createBitmap(newW, newH, bitmap.config)
-        val c = Canvas(bitmapTex)
-        c.drawBitmap(bitmap, 0f, 0f, null)
-
-        // Calculate final texture coordinates.
-        val texX = w.toFloat() / newW
-        val texY = h.toFloat() / newH
-        textureRect.set(0f, 0f, texX, texY)
-
-        return bitmapTex
-    }
-
-    /**
-     * Getter for textures. Creates Bitmap sized to nearest power of two, copies
-     * original Bitmap into it and returns it. RectF given as parameter is
-     * filled with actual texture coordinates in this new upscaled texture
-     * Bitmap.
-     */
-    fun getTexture(textureRect: RectF, side: Int): Bitmap {
-        return when (side) {
-            SIDE_FRONT -> getTexture(mTextureFront!!, textureRect)
-            else -> getTexture(mTextureBack!!, textureRect)
-        }
-    }
-
-    /**
-     * Returns true if back siding texture exists and it differs from front
-     * facing one.
-     */
-    fun hasBackTexture(): Boolean {
-        return mTextureFront != mTextureBack
-    }
-
-    /**
-     * Recycles and frees underlying Bitmaps.
-     */
-    fun recycle() {
-        if (mTextureFront != null) {
-            mTextureFront!!.recycle()
-        }
-        mTextureFront = Bitmap.createBitmap(1, 1, Bitmap.Config.RGB_565)
-        mTextureFront!!.eraseColor(mColorFront)
-        if (mTextureBack != null) {
-            mTextureBack!!.recycle()
-        }
-        mTextureBack = Bitmap.createBitmap(1, 1, Bitmap.Config.RGB_565)
-        mTextureBack!!.eraseColor(mColorBack)
-        texturesChanged = false
-    }
-
-    /**
-     * Resets this CurlPage into its initial state.
-     */
-    fun reset() {
-        mColorBack = Color.WHITE
-        mColorFront = Color.WHITE
-        recycle()
-    }
-
-    /**
-     * Setter blend color.
-     */
-    fun setColor(color: Int, side: Int) {
-        when (side) {
-            SIDE_FRONT -> mColorFront = color
-            SIDE_BACK -> mColorBack = color
-            else -> {
-                mColorBack = color
-                mColorFront = mColorBack
-            }
-        }
-    }
-
-    /**
-     * Setter for textures.
-     */
-    fun setTexture(texture: Bitmap?, side: Int) {
-        var texture1 = texture
-        if (texture1 == null) {
-            texture1 = Bitmap.createBitmap(1, 1, Bitmap.Config.RGB_565)
-            if (side == SIDE_BACK) {
-                texture1!!.eraseColor(mColorBack)
-            } else {
-                texture1!!.eraseColor(mColorFront)
-            }
-        }
-        when (side) {
-            SIDE_FRONT -> {
-                if (mTextureFront != null)
-                    mTextureFront!!.recycle()
-                mTextureFront = texture1
-            }
-            SIDE_BACK -> {
-                if (mTextureBack != null)
-                    mTextureBack!!.recycle()
-                mTextureBack = texture1
-            }
-            SIDE_BOTH -> {
-                if (mTextureFront != null)
-                    mTextureFront!!.recycle()
-                if (mTextureBack != null)
-                    mTextureBack!!.recycle()
-                mTextureBack = texture1
-                mTextureFront = mTextureBack
-            }
-        }
-        texturesChanged = true
-    }
-
-    companion object {
-
-        const val SIDE_BACK = 2
-        const val SIDE_BOTH = 3
-        const val SIDE_FRONT = 1
-    }
-
-}

app/src/main/java/io/legado/app/ui/book/read/page/curl/CurlRenderer.kt

@@ -1,221 +0,0 @@
-package io.legado.app.ui.book.read.page.curl
-
-import android.graphics.Color
-import android.graphics.PointF
-import android.graphics.RectF
-import android.opengl.GLSurfaceView
-import android.opengl.GLU
-import java.util.*
-import javax.microedition.khronos.egl.EGLConfig
-import javax.microedition.khronos.opengles.GL10
-
-/**
- * Actual renderer class.
- *
- * @author harism
- */
-class CurlRenderer(private val mObserver: Observer) : GLSurfaceView.Renderer {
-    // Background fill color.
-    private var mBackgroundColor: Int = 0
-    // Curl meshes used for static and dynamic rendering.
-    private val mCurlMeshes: Vector<CurlMesh> = Vector()
-    private val mMargins = RectF()
-    // Page rectangles.
-    private val mPageRectLeft: RectF = RectF()
-    private val mPageRectRight: RectF = RectF()
-    // View mode.
-    private var mViewMode = SHOW_ONE_PAGE
-    // Screen size.
-    private var mViewportWidth: Int = 0
-    private var mViewportHeight: Int = 0
-    // Rect for render area.
-    private val mViewRect = RectF()
-
-    /**
-     * Adds CurlMesh to this renderer.
-     */
-    @Synchronized
-    fun addCurlMesh(mesh: CurlMesh) {
-        removeCurlMesh(mesh)
-        mCurlMeshes.add(mesh)
-    }
-
-    /**
-     * Returns rect reserved for left or right page. Value page should be
-     * PAGE_LEFT or PAGE_RIGHT.
-     */
-    fun getPageRect(page: Int): RectF? {
-        if (page == PAGE_LEFT) {
-            return mPageRectLeft
-        } else if (page == PAGE_RIGHT) {
-            return mPageRectRight
-        }
-        return null
-    }
-
-    @Synchronized
-    override fun onDrawFrame(gl: GL10) {
-
-        mObserver.onDrawFrame()
-
-        gl.glClearColor(
-            Color.red(mBackgroundColor) / 255f,
-            Color.green(mBackgroundColor) / 255f,
-            Color.blue(mBackgroundColor) / 255f,
-            Color.alpha(mBackgroundColor) / 255f
-        )
-        gl.glClear(GL10.GL_COLOR_BUFFER_BIT)
-        gl.glLoadIdentity()
-
-        if (!mObserver.canDraw) {
-            return
-        }
-
-        for (i in mCurlMeshes.indices) {
-            mCurlMeshes[i].onDrawFrame(gl)
-        }
-    }
-
-    override fun onSurfaceChanged(gl: GL10, width: Int, height: Int) {
-        gl.glViewport(0, 0, width, height)
-        mViewportWidth = width
-        mViewportHeight = height
-
-        val ratio = width.toFloat() / height
-        mViewRect.top = 1.0f
-        mViewRect.bottom = -1.0f
-        mViewRect.left = -ratio
-        mViewRect.right = ratio
-        updatePageRect()
-
-        gl.glMatrixMode(GL10.GL_PROJECTION)
-        gl.glLoadIdentity()
-        GLU.gluOrtho2D(
-            gl, mViewRect.left, mViewRect.right,
-            mViewRect.bottom, mViewRect.top
-        )
-
-        gl.glMatrixMode(GL10.GL_MODELVIEW)
-        gl.glLoadIdentity()
-    }
-
-    override fun onSurfaceCreated(gl: GL10, config: EGLConfig) {
-        gl.glClearColor(0f, 0f, 0f, 1f)
-        gl.glShadeModel(GL10.GL_SMOOTH)
-        gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_NICEST)
-        gl.glHint(GL10.GL_LINE_SMOOTH_HINT, GL10.GL_NICEST)
-        gl.glHint(GL10.GL_POLYGON_SMOOTH_HINT, GL10.GL_NICEST)
-        gl.glEnable(GL10.GL_LINE_SMOOTH)
-        gl.glDisable(GL10.GL_DEPTH_TEST)
-        gl.glDisable(GL10.GL_CULL_FACE)
-
-        mObserver.onSurfaceCreated()
-    }
-
-    /**
-     * Removes CurlMesh from this renderer.
-     */
-    @Synchronized
-    fun removeCurlMesh(mesh: CurlMesh) {
-        mCurlMeshes.remove(mesh)
-    }
-
-    /**
-     * Sets visible page count to one or two. Should be either SHOW_ONE_PAGE or
-     * SHOW_TWO_PAGES.
-     */
-    @Synchronized
-    fun setViewMode(viewMode: Int) {
-        if (viewMode == SHOW_ONE_PAGE) {
-            mViewMode = viewMode
-            updatePageRect()
-        } else if (viewMode == SHOW_TWO_PAGES) {
-            mViewMode = viewMode
-            updatePageRect()
-        }
-    }
-
-    /**
-     * Translates screen coordinates into view coordinates.
-     */
-    fun translate(pt: PointF) {
-        pt.x = mViewRect.left + mViewRect.width() * pt.x / mViewportWidth
-        pt.y = mViewRect.top - -mViewRect.height() * pt.y / mViewportHeight
-    }
-
-    /**
-     * Recalculates page rectangles.
-     */
-    private fun updatePageRect() {
-        if (mViewRect.width() == 0f || mViewRect.height() == 0f) {
-            return
-        } else if (mViewMode == SHOW_ONE_PAGE) {
-            mPageRectRight.set(mViewRect)
-            mPageRectRight.left += mViewRect.width() * mMargins.left
-            mPageRectRight.right -= mViewRect.width() * mMargins.right
-            mPageRectRight.top += mViewRect.height() * mMargins.top
-            mPageRectRight.bottom -= mViewRect.height() * mMargins.bottom
-
-            mPageRectLeft.set(mPageRectRight)
-            mPageRectLeft.offset(-mPageRectRight.width(), 0f)
-
-            val bitmapW = (mPageRectRight.width() * mViewportWidth / mViewRect
-                .width()).toInt()
-            val bitmapH = (mPageRectRight.height() * mViewportHeight / mViewRect
-                .height()).toInt()
-            mObserver.onPageSizeChanged(bitmapW, bitmapH)
-        } else if (mViewMode == SHOW_TWO_PAGES) {
-            mPageRectRight.set(mViewRect)
-            mPageRectRight.left += mViewRect.width() * mMargins.left
-            mPageRectRight.right -= mViewRect.width() * mMargins.right
-            mPageRectRight.top += mViewRect.height() * mMargins.top
-            mPageRectRight.bottom -= mViewRect.height() * mMargins.bottom
-
-            mPageRectLeft.set(mPageRectRight)
-            mPageRectLeft.right = (mPageRectLeft.right + mPageRectLeft.left) / 2
-            mPageRectRight.left = mPageRectLeft.right
-
-            val bitmapW = (mPageRectRight.width() * mViewportWidth / mViewRect
-                .width()).toInt()
-            val bitmapH = (mPageRectRight.height() * mViewportHeight / mViewRect
-                .height()).toInt()
-            mObserver.onPageSizeChanged(bitmapW, bitmapH)
-        }
-    }
-
-    /**
-     * Observer for waiting render engine/state updates.
-     */
-    interface Observer {
-        /**
-         * Called from onDrawFrame called before rendering is started. This is
-         * intended to be used for animation purposes.
-         */
-        fun onDrawFrame()
-
-        /**
-         * Called once page size is changed. Width and height tell the page size
-         * in pixels making it possible to update textures accordingly.
-         */
-        fun onPageSizeChanged(width: Int, height: Int)
-
-        /**
-         * Called from onSurfaceCreated to enable texture re-initialization etc
-         * what needs to be done when this happens.
-         */
-        fun onSurfaceCreated()
-
-        var canDraw: Boolean
-    }
-
-    companion object {
-
-        // Constant for requesting left page rect.
-        const val PAGE_LEFT = 1
-        // Constant for requesting right page rect.
-        const val PAGE_RIGHT = 2
-        // Constants for changing view mode.
-        const val SHOW_ONE_PAGE = 1
-        const val SHOW_TWO_PAGES = 2
-    }
-}

app/src/main/java/io/legado/app/ui/book/read/page/curl/CurlView.kt

@@ -1,769 +0,0 @@
-package io.legado.app.ui.book.read.page.curl
-
-import android.content.Context
-import android.graphics.PixelFormat
-import android.graphics.PointF
-import android.opengl.GLSurfaceView
-import android.util.AttributeSet
-import android.view.MotionEvent
-import android.view.View
-import kotlin.math.max
-import kotlin.math.min
-import kotlin.math.sin
-import kotlin.math.sqrt
-
-/**
- * OpenGL ES View.
- *
- * @author harism
- */
-class CurlView : GLSurfaceView, View.OnTouchListener, CurlRenderer.Observer {
-    var callBack: CallBack? = null
-    private var mAllowLastPageCurl = true
-
-    private var mAnimate = false
-    private val mAnimationDurationTime: Long = 300
-    private val mAnimationSource = PointF()
-    private var mAnimationStartTime: Long = 0
-    private val mAnimationTarget = PointF()
-    private var mAnimationTargetEvent: Int = 0
-
-    private val mCurlDir = PointF()
-
-    private val mCurlPos = PointF()
-    private var mCurlState = CURL_NONE
-    // Current bitmap index. This is always showed as front of right page.
-    private var mCurrentIndex = 0
-
-    // Start position for dragging.
-    private val mDragStartPos = PointF()
-
-    private var mEnableTouchPressure = false
-    // Bitmap size. These are updated from renderer once it's initialized.
-    private var mPageBitmapHeight = -1
-
-    private var mPageBitmapWidth = -1
-    // Page meshes. Left and right meshes are 'static' while curl is used to
-    // show page flipping.
-    private var mPageCurl: CurlMesh
-    private var mPageLeft: CurlMesh
-    private var mPageRight: CurlMesh
-
-    private val mPointerPos = PointerPosition()
-
-    private var mRenderer: CurlRenderer = CurlRenderer(this)
-    private var mRenderLeftPage = true
-    private var mSizeChangedObserver: SizeChangedObserver? = null
-
-    // One page is the default.
-    private var mViewMode = SHOW_ONE_PAGE
-
-    var mPageProvider: PageProvider? = null
-        set(value) {
-            field = value
-            mCurrentIndex = 0
-            updatePages()
-            requestRender()
-        }
-
-    /**
-     * Get current page index. Page indices are zero based values presenting
-     * page being shown on right side of the book.
-     */
-    /**
-     * Set current page index. Page indices are zero based values presenting
-     * page being shown on right side of the book. E.g if you set value to 4;
-     * right side front facing bitmap will be with index 4, back facing 5 and
-     * for left side page index 3 is front facing, and index 2 back facing (once
-     * page is on left side it's flipped over).
-     *
-     *
-     * Current index is rounded to closest value divisible with 2.
-     */
-    var currentIndex: Int
-        get() = mCurrentIndex
-        set(index) {
-            mCurrentIndex = if (mPageProvider == null || index < 0) {
-                0
-            } else {
-                if (mAllowLastPageCurl) {
-                    min(index, mPageProvider!!.pageCount)
-                } else {
-                    min(index, mPageProvider!!.pageCount - 1)
-                }
-            }
-            updatePages()
-            requestRender()
-        }
-
-    /**
-     * Default constructor.
-     */
-    constructor(ctx: Context) : super(ctx)
-
-    /**
-     * Default constructor.
-     */
-    constructor(ctx: Context, attrs: AttributeSet) : super(ctx, attrs)
-
-    /**
-     * Default constructor.
-     */
-    constructor(ctx: Context, attrs: AttributeSet, defStyle: Int) : this(ctx, attrs)
-
-    /**
-     * Initialize method.
-     */
-    init {
-        setEGLConfigChooser(8, 8, 8, 8, 16, 0)
-        holder.setFormat(PixelFormat.TRANSLUCENT)
-        setZOrderOnTop(true)
-
-        setRenderer(mRenderer)
-        renderMode = RENDERMODE_WHEN_DIRTY
-        setOnTouchListener(this)
-
-        // Even though left and right pages are static we have to allocate room
-        // for curl on them too as we are switching meshes. Another way would be
-        // to swap texture ids only.
-        mPageLeft = CurlMesh(10)
-        mPageRight = CurlMesh(10)
-        mPageCurl = CurlMesh(10)
-        mPageLeft.setFlipTexture(true)
-        mPageRight.setFlipTexture(false)
-    }
-
-    override var canDraw: Boolean = false
-
-    override fun onDrawFrame() {
-        // We are not animating.
-        if (!mAnimate) {
-            return
-        }
-
-        val currentTime = System.currentTimeMillis()
-        // If animation is done.
-        if (currentTime >= mAnimationStartTime + mAnimationDurationTime) {
-            if (mAnimationTargetEvent == SET_CURL_TO_RIGHT) {
-                // Switch curled page to right.
-                val right = mPageCurl
-                val curl = mPageRight
-                right.setRect(mRenderer.getPageRect(CurlRenderer.PAGE_RIGHT)!!)
-                right.setFlipTexture(false)
-                right.reset()
-                mRenderer.removeCurlMesh(curl)
-                mPageCurl = curl
-                mPageRight = right
-                // If we were curling left page update current index.
-                if (mCurlState == CURL_LEFT) {
-                    --mCurrentIndex
-                    callBack?.pageChange(-1)
-                }
-                canDraw = false
-            } else if (mAnimationTargetEvent == SET_CURL_TO_LEFT) {
-                // Switch curled page to left.
-                val left = mPageCurl
-                val curl = mPageLeft
-                left.setRect(mRenderer.getPageRect(CurlRenderer.PAGE_LEFT)!!)
-                left.setFlipTexture(true)
-                left.reset()
-                mRenderer.removeCurlMesh(curl)
-                if (!mRenderLeftPage) {
-                    mRenderer.removeCurlMesh(left)
-                }
-                mPageCurl = curl
-                mPageLeft = left
-                // If we were curling right page update current index.
-                if (mCurlState == CURL_RIGHT) {
-                    ++mCurrentIndex
-                    callBack?.pageChange(1)
-                }
-                canDraw = false
-            }
-            mCurlState = CURL_NONE
-            mAnimate = false
-            requestRender()
-        } else {
-            mPointerPos.mPos.set(mAnimationSource)
-            var t = 1f - (currentTime - mAnimationStartTime).toFloat() / mAnimationDurationTime
-            t = 1f - t * t * t * (3 - 2 * t)
-            mPointerPos.mPos.x += (mAnimationTarget.x - mAnimationSource.x) * t
-            mPointerPos.mPos.y += (mAnimationTarget.y - mAnimationSource.y) * t
-            updateCurlPos(mPointerPos)
-        }
-    }
-
-
-    override fun onPageSizeChanged(width: Int, height: Int) {
-        mPageBitmapWidth = width
-        mPageBitmapHeight = height
-        updatePages()
-        requestRender()
-    }
-
-    public override fun onSizeChanged(w: Int, h: Int, ow: Int, oh: Int) {
-        super.onSizeChanged(w, h, ow, oh)
-        requestRender()
-        if (mSizeChangedObserver != null) {
-            mSizeChangedObserver!!.onSizeChanged(w, h)
-        }
-    }
-
-    override fun onSurfaceCreated() {
-        // In case surface is recreated, let page meshes drop allocated texture
-        // ids and ask for new ones. There's no need to set textures here as
-        // onPageSizeChanged should be called later on.
-        mPageLeft.resetTexture()
-        mPageRight.resetTexture()
-        mPageCurl.resetTexture()
-    }
-
-    override fun onTouch(view: View, me: MotionEvent): Boolean {
-        // No dragging during animation at the moment.
-        if (mAnimate || mPageProvider == null) {
-            return false
-        }
-
-        // We need page rects quite extensively so get them for later use.
-        val rightRect = mRenderer.getPageRect(CurlRenderer.PAGE_RIGHT)
-        val leftRect = mRenderer.getPageRect(CurlRenderer.PAGE_LEFT)
-
-        // Store pointer position.
-        mPointerPos.mPos.set(me.x, me.y)
-        mRenderer.translate(mPointerPos.mPos)
-        if (mEnableTouchPressure) {
-            mPointerPos.mPressure = me.pressure
-        } else {
-            mPointerPos.mPressure = 0.8f
-        }
-
-        when (me.action) {
-            MotionEvent.ACTION_DOWN -> {
-                run {
-
-                    // Once we receive pointer down event its position is mapped to
-                    // right or left edge of page and that'll be the position from where
-                    // user is holding the paper to make curl happen.
-                    mDragStartPos.set(mPointerPos.mPos)
-
-                    // First we make sure it's not over or below page. Pages are
-                    // supposed to be same height so it really doesn't matter do we use
-                    // left or right one.
-                    if (mDragStartPos.y > rightRect!!.top) {
-                        mDragStartPos.y = rightRect.top
-                    } else if (mDragStartPos.y < rightRect.bottom) {
-                        mDragStartPos.y = rightRect.bottom
-                    }
-
-                    // Then we have to make decisions for the user whether curl is going
-                    // to happen from left or right, and on which page.
-                    if (mViewMode == SHOW_TWO_PAGES) {
-                        // If we have an open book and pointer is on the left from right
-                        // page we'll mark drag position to left edge of left page.
-                        // Additionally checking mCurrentIndex is higher than zero tells
-                        // us there is a visible page at all.
-                        if (mDragStartPos.x < rightRect.left && mCurrentIndex > 0) {
-                            mDragStartPos.x = leftRect!!.left
-                            startCurl(CURL_LEFT)
-                        } else if (mDragStartPos.x >= rightRect.left && mCurrentIndex < mPageProvider!!.pageCount) {
-                            mDragStartPos.x = rightRect.right
-                            if (!mAllowLastPageCurl && mCurrentIndex >= mPageProvider!!.pageCount - 1) {
-                                return false
-                            }
-                            startCurl(CURL_RIGHT)
-                        }// Otherwise check pointer is on right page's side.
-                    } else if (mViewMode == SHOW_ONE_PAGE) {
-                        val halfX = (rightRect.right + rightRect.left) / 2
-                        if (mDragStartPos.x < halfX && mCurrentIndex > 0) {
-                            mDragStartPos.x = rightRect.left
-                            startCurl(CURL_LEFT)
-                        } else if (mDragStartPos.x >= halfX && mCurrentIndex < mPageProvider!!.pageCount) {
-                            mDragStartPos.x = rightRect.right
-                            if (!mAllowLastPageCurl && mCurrentIndex >= mPageProvider!!.pageCount - 1) {
-                                return false
-                            }
-                            startCurl(CURL_RIGHT)
-                        }
-                    }
-                    // If we have are in curl state, let this case clause flow through
-                    // to next one. We have pointer position and drag position defined
-                    // and this will create first render request given these points.
-                    if (mCurlState == CURL_NONE) {
-                        return false
-                    }
-                }
-                updateCurlPos(mPointerPos)
-            }
-            MotionEvent.ACTION_MOVE -> {
-                updateCurlPos(mPointerPos)
-            }
-            MotionEvent.ACTION_CANCEL, MotionEvent.ACTION_UP -> {
-                if (mCurlState == CURL_LEFT || mCurlState == CURL_RIGHT) {
-                    // Animation source is the point from where animation starts.
-                    // Also it's handled in a way we actually simulate touch events
-                    // meaning the output is exactly the same as if user drags the
-                    // page to other side. While not producing the best looking
-                    // result (which is easier done by altering curl position and/or
-                    // direction directly), this is done in a hope it made code a
-                    // bit more readable and easier to maintain.
-                    mAnimationSource.set(mPointerPos.mPos)
-                    mAnimationStartTime = System.currentTimeMillis()
-
-                    // Given the explanation, here we decide whether to simulate
-                    // drag to left or right end.
-                    if (mViewMode == SHOW_ONE_PAGE && mPointerPos.mPos.x > (rightRect!!.left + rightRect.right) / 2 || mViewMode == SHOW_TWO_PAGES && mPointerPos.mPos.x > rightRect!!.left) {
-                        // On right side target is always right page's right border.
-                        mAnimationTarget.set(mDragStartPos)
-                        mAnimationTarget.x = mRenderer
-                            .getPageRect(CurlRenderer.PAGE_RIGHT)!!.right
-                        mAnimationTargetEvent = SET_CURL_TO_RIGHT
-                    } else {
-                        // On left side target depends on visible pages.
-                        mAnimationTarget.set(mDragStartPos)
-                        if (mCurlState == CURL_RIGHT || mViewMode == SHOW_TWO_PAGES) {
-                            mAnimationTarget.x = leftRect!!.left
-                        } else {
-                            mAnimationTarget.x = rightRect!!.left
-                        }
-                        mAnimationTargetEvent = SET_CURL_TO_LEFT
-                    }
-                    mAnimate = true
-                    requestRender()
-                }
-            }
-        }
-
-        return true
-    }
-
-    /**
-     * Allow the last page to curl.
-     */
-    fun setAllowLastPageCurl(allowLastPageCurl: Boolean) {
-        mAllowLastPageCurl = allowLastPageCurl
-    }
-
-    /**
-     * Sets mPageCurl curl position.
-     */
-    private fun setCurlPos(curlPos: PointF, curlDir: PointF, radius: Double) {
-
-        // First reposition curl so that page doesn't 'rip off' from book.
-        if (mCurlState == CURL_RIGHT || mCurlState == CURL_LEFT && mViewMode == SHOW_ONE_PAGE) {
-            val pageRect = mRenderer.getPageRect(CurlRenderer.PAGE_RIGHT)
-            if (curlPos.x >= pageRect!!.right) {
-                mPageCurl.reset()
-                requestRender()
-                return
-            }
-            if (curlPos.x < pageRect.left) {
-                curlPos.x = pageRect.left
-            }
-            if (curlDir.y != 0f) {
-                val diffX = curlPos.x - pageRect.left
-                val leftY = curlPos.y + diffX * curlDir.x / curlDir.y
-                if (curlDir.y < 0 && leftY < pageRect.top) {
-                    curlDir.x = curlPos.y - pageRect.top
-                    curlDir.y = pageRect.left - curlPos.x
-                } else if (curlDir.y > 0 && leftY > pageRect.bottom) {
-                    curlDir.x = pageRect.bottom - curlPos.y
-                    curlDir.y = curlPos.x - pageRect.left
-                }
-            }
-        } else if (mCurlState == CURL_LEFT) {
-            val pageRect = mRenderer.getPageRect(CurlRenderer.PAGE_LEFT)
-            if (curlPos.x <= pageRect!!.left) {
-                mPageCurl.reset()
-                requestRender()
-                return
-            }
-            if (curlPos.x > pageRect.right) {
-                curlPos.x = pageRect.right
-            }
-            if (curlDir.y != 0f) {
-                val diffX = curlPos.x - pageRect.right
-                val rightY = curlPos.y + diffX * curlDir.x / curlDir.y
-                if (curlDir.y < 0 && rightY < pageRect.top) {
-                    curlDir.x = pageRect.top - curlPos.y
-                    curlDir.y = curlPos.x - pageRect.right
-                } else if (curlDir.y > 0 && rightY > pageRect.bottom) {
-                    curlDir.x = curlPos.y - pageRect.bottom
-                    curlDir.y = pageRect.right - curlPos.x
-                }
-            }
-        }
-
-        // Finally normalize direction vector and do rendering.
-        val dist = sqrt((curlDir.x * curlDir.x + curlDir.y * curlDir.y).toDouble())
-        if (dist != 0.0) {
-            curlDir.x /= dist.toFloat()
-            curlDir.y /= dist.toFloat()
-            mPageCurl.curl(curlPos, curlDir, radius)
-        } else {
-            mPageCurl.reset()
-        }
-
-        requestRender()
-    }
-
-    /**
-     * If set to true, touch event pressure information is used to adjust curl
-     * radius. The more you press, the flatter the curl becomes. This is
-     * somewhat experimental and results may vary significantly between devices.
-     * On emulator pressure information seems to be flat 1.0f which is maximum
-     * value and therefore not very much of use.
-     */
-    fun setEnableTouchPressure(enableTouchPressure: Boolean) {
-        mEnableTouchPressure = enableTouchPressure
-    }
-
-    /**
-     * Setter for whether left side page is rendered. This is useful mostly for
-     * situations where right (main) page is aligned to left side of screen and
-     * left page is not visible anyway.
-     */
-    fun setRenderLeftPage(renderLeftPage: Boolean) {
-        mRenderLeftPage = renderLeftPage
-    }
-
-    /**
-     * Sets SizeChangedObserver for this View. Call back method is called from
-     * this View's onSizeChanged method.
-     */
-    fun setSizeChangedObserver(observer: SizeChangedObserver) {
-        mSizeChangedObserver = observer
-    }
-
-    /**
-     * Sets view mode. Value can be either SHOW_ONE_PAGE or SHOW_TWO_PAGES. In
-     * former case right page is made size of display, and in latter case two
-     * pages are laid on visible area.
-     */
-    fun setViewMode(viewMode: Int) {
-        when (viewMode) {
-            SHOW_ONE_PAGE -> {
-                mViewMode = viewMode
-                mPageLeft.setFlipTexture(true)
-                mRenderer.setViewMode(CurlRenderer.SHOW_ONE_PAGE)
-            }
-            SHOW_TWO_PAGES -> {
-                mViewMode = viewMode
-                mPageLeft.setFlipTexture(false)
-                mRenderer.setViewMode(CurlRenderer.SHOW_TWO_PAGES)
-            }
-        }
-    }
-
-    /**
-     * Switches meshes and loads new bitmaps if available. Updated to support 2
-     * pages in landscape
-     */
-    private fun startCurl(page: Int) {
-        when (page) {
-
-            // Once right side page is curled, first right page is assigned into
-            // curled page. And if there are more bitmaps available new bitmap is
-            // loaded into right side mesh.
-            CURL_RIGHT -> {
-                // Remove meshes from renderer.
-                mRenderer.removeCurlMesh(mPageLeft)
-                mRenderer.removeCurlMesh(mPageRight)
-                mRenderer.removeCurlMesh(mPageCurl)
-
-                // We are curling right page.
-                val curl = mPageRight
-                mPageRight = mPageCurl
-                mPageCurl = curl
-
-                if (mCurrentIndex > 0) {
-                    mPageLeft.setFlipTexture(true)
-                    mPageLeft.setRect(mRenderer.getPageRect(CurlRenderer.PAGE_LEFT)!!)
-                    mPageLeft.reset()
-                    if (mRenderLeftPage) {
-                        mRenderer.addCurlMesh(mPageLeft)
-                    }
-                }
-                if (mCurrentIndex < mPageProvider!!.pageCount - 1) {
-                    updatePage(mPageRight.texturePage, mCurrentIndex + 1)
-                    mPageRight.setRect(
-                        mRenderer.getPageRect(CurlRenderer.PAGE_RIGHT)!!
-                    )
-                    mPageRight.setFlipTexture(false)
-                    mPageRight.reset()
-                    mRenderer.addCurlMesh(mPageRight)
-                }
-
-                // Add curled page to renderer.
-                mPageCurl.setRect(mRenderer.getPageRect(CurlRenderer.PAGE_RIGHT)!!)
-                mPageCurl.setFlipTexture(false)
-                mPageCurl.reset()
-                mRenderer.addCurlMesh(mPageCurl)
-
-                mCurlState = CURL_RIGHT
-            }
-
-            // On left side curl, left page is assigned to curled page. And if
-            // there are more bitmaps available before currentIndex, new bitmap
-            // is loaded into left page.
-            CURL_LEFT -> {
-                // Remove meshes from renderer.
-                mRenderer.removeCurlMesh(mPageLeft)
-                mRenderer.removeCurlMesh(mPageRight)
-                mRenderer.removeCurlMesh(mPageCurl)
-
-                // We are curling left page.
-                val curl = mPageLeft
-                mPageLeft = mPageCurl
-                mPageCurl = curl
-
-                if (mCurrentIndex > 1) {
-                    updatePage(mPageLeft.texturePage, mCurrentIndex - 2)
-                    mPageLeft.setFlipTexture(true)
-                    mPageLeft
-                        .setRect(mRenderer.getPageRect(CurlRenderer.PAGE_LEFT)!!)
-                    mPageLeft.reset()
-                    if (mRenderLeftPage) {
-                        mRenderer.addCurlMesh(mPageLeft)
-                    }
-                }
-
-                // If there is something to show on right page add it to renderer.
-                if (mCurrentIndex < mPageProvider!!.pageCount) {
-                    mPageRight.setFlipTexture(false)
-                    mPageRight.setRect(
-                        mRenderer.getPageRect(CurlRenderer.PAGE_RIGHT)!!
-                    )
-                    mPageRight.reset()
-                    mRenderer.addCurlMesh(mPageRight)
-                }
-
-                // How dragging previous page happens depends on view mode.
-                if (mViewMode == SHOW_ONE_PAGE || mCurlState == CURL_LEFT && mViewMode == SHOW_TWO_PAGES) {
-                    mPageCurl.setRect(
-                        mRenderer.getPageRect(CurlRenderer.PAGE_RIGHT)!!
-                    )
-                    mPageCurl.setFlipTexture(false)
-                } else {
-                    mPageCurl.setRect(mRenderer.getPageRect(CurlRenderer.PAGE_LEFT)!!)
-                    mPageCurl.setFlipTexture(true)
-                }
-                mPageCurl.reset()
-                mRenderer.addCurlMesh(mPageCurl)
-
-                mCurlState = CURL_LEFT
-            }
-        }
-    }
-
-    /**
-     * Updates curl position.
-     */
-    private fun updateCurlPos(pointerPos: PointerPosition) {
-
-        // Default curl radius.
-        var radius = (mRenderer.getPageRect(CURL_RIGHT)!!.width() / 3).toDouble()
-        // TODO: This is not an optimal solution. Based on feedback received so
-        // far; pressure is not very accurate, it may be better not to map
-        // coefficient to range [0f, 1f] but something like [.2f, 1f] instead.
-        // Leaving it as is until get my hands on a real device. On emulator
-        // this doesn't work anyway.
-        radius *= max(1f - pointerPos.mPressure, 0f).toDouble()
-        // NOTE: Here we set pointerPos to mCurlPos. It might be a bit confusing
-        // later to see e.g "mCurlPos.x - mDragStartPos.x" used. But it's
-        // actually pointerPos we are doing calculations against. Why? Simply to
-        // optimize code a bit with the cost of making it unreadable. Otherwise
-        // we had to this in both of the next if-else branches.
-        mCurlPos.set(pointerPos.mPos)
-
-        // If curl happens on right page, or on left page on two page mode,
-        // we'll calculate curl position from pointerPos.
-        if (mCurlState == CURL_RIGHT || mCurlState == CURL_LEFT && mViewMode == SHOW_TWO_PAGES) {
-
-            mCurlDir.x = mCurlPos.x - mDragStartPos.x
-            mCurlDir.y = mCurlPos.y - mDragStartPos.y
-            val dist =
-                sqrt((mCurlDir.x * mCurlDir.x + mCurlDir.y * mCurlDir.y).toDouble()).toFloat()
-
-            // Adjust curl radius so that if page is dragged far enough on
-            // opposite side, radius gets closer to zero.
-            val pageWidth = mRenderer.getPageRect(CurlRenderer.PAGE_RIGHT)!!
-                .width()
-            var curlLen = radius * Math.PI
-            if (dist > pageWidth * 2 - curlLen) {
-                curlLen = max(pageWidth * 2 - dist, 0f).toDouble()
-                radius = curlLen / Math.PI
-            }
-
-            // Actual curl position calculation.
-            if (dist >= curlLen) {
-                val translate = (dist - curlLen) / 2
-                if (mViewMode == SHOW_TWO_PAGES) {
-                    mCurlPos.x -= (mCurlDir.x * translate / dist).toFloat()
-                } else {
-                    val pageLeftX = mRenderer
-                        .getPageRect(CurlRenderer.PAGE_RIGHT)!!.left
-                    radius = max(
-                        min((mCurlPos.x - pageLeftX).toDouble(), radius),
-                        0.0
-                    )
-                }
-                mCurlPos.y -= (mCurlDir.y * translate / dist).toFloat()
-            } else {
-                val angle = Math.PI * sqrt(dist / curlLen)
-                val translate = radius * sin(angle)
-                mCurlPos.x += (mCurlDir.x * translate / dist).toFloat()
-                mCurlPos.y += (mCurlDir.y * translate / dist).toFloat()
-            }
-        } else if (mCurlState == CURL_LEFT) {
-
-            // Adjust radius regarding how close to page edge we are.
-            val pageLeftX = mRenderer.getPageRect(CurlRenderer.PAGE_RIGHT)!!.left
-            radius = max(min((mCurlPos.x - pageLeftX).toDouble(), radius), 0.0)
-
-            val pageRightX = mRenderer.getPageRect(CurlRenderer.PAGE_RIGHT)!!.right
-            mCurlPos.x -= min((pageRightX - mCurlPos.x).toDouble(), radius).toFloat()
-            mCurlDir.x = mCurlPos.x + mDragStartPos.x
-            mCurlDir.y = mCurlPos.y - mDragStartPos.y
-        }// Otherwise we'll let curl follow pointer position.
-
-        setCurlPos(mCurlPos, mCurlDir, radius)
-    }
-
-    /**
-     * Updates given CurlPage via PageProvider for page located at index.
-     */
-    private fun updatePage(page: CurlPage, index: Int) {
-        // First reset page to initial state.
-        page.reset()
-        // Ask page provider to fill it up with bitmaps and colors.
-        mPageProvider!!.updatePage(
-            page, mPageBitmapWidth, mPageBitmapHeight,
-            index
-        )
-    }
-
-    /**
-     * Updates bitmaps for page meshes.
-     */
-    fun updatePages() {
-        if (mPageProvider == null || mPageBitmapWidth <= 0
-            || mPageBitmapHeight <= 0
-        ) {
-            return
-        }
-
-        // Remove meshes from renderer.
-        mRenderer.removeCurlMesh(mPageLeft)
-        mRenderer.removeCurlMesh(mPageRight)
-        mRenderer.removeCurlMesh(mPageCurl)
-
-        var leftIdx = mCurrentIndex - 1
-        var rightIdx = mCurrentIndex
-        var curlIdx = -1
-        if (mCurlState == CURL_LEFT) {
-            curlIdx = leftIdx
-            --leftIdx
-        } else if (mCurlState == CURL_RIGHT) {
-            curlIdx = rightIdx
-            ++rightIdx
-        }
-
-        if (rightIdx >= 0 && rightIdx < mPageProvider!!.pageCount) {
-            updatePage(mPageRight.texturePage, rightIdx)
-            mPageRight.setFlipTexture(false)
-            mPageRight.setRect(mRenderer.getPageRect(CurlRenderer.PAGE_RIGHT)!!)
-            mPageRight.reset()
-            mRenderer.addCurlMesh(mPageRight)
-        }
-        if (leftIdx >= 0 && leftIdx < mPageProvider!!.pageCount) {
-            updatePage(mPageLeft.texturePage, leftIdx)
-            mPageLeft.setFlipTexture(true)
-            mPageLeft.setRect(mRenderer.getPageRect(CurlRenderer.PAGE_LEFT)!!)
-            mPageLeft.reset()
-            if (mRenderLeftPage) {
-                mRenderer.addCurlMesh(mPageLeft)
-            }
-        }
-        if (curlIdx >= 0 && curlIdx < mPageProvider!!.pageCount) {
-            updatePage(mPageCurl.texturePage, curlIdx)
-
-            if (mCurlState == CURL_RIGHT) {
-                mPageCurl.setFlipTexture(true)
-                mPageCurl.setRect(
-                    mRenderer.getPageRect(CurlRenderer.PAGE_RIGHT)!!
-                )
-            } else {
-                mPageCurl.setFlipTexture(false)
-                mPageCurl
-                    .setRect(mRenderer.getPageRect(CurlRenderer.PAGE_LEFT)!!)
-            }
-
-            mPageCurl.reset()
-            mRenderer.addCurlMesh(mPageCurl)
-        }
-    }
-
-    /**
-     * Provider for feeding 'book' with bitmaps which are used for rendering
-     * pages.
-     */
-    interface PageProvider {
-
-        /**
-         * Return number of pages available.
-         */
-        val pageCount: Int
-
-        /**
-         * Called once new bitmaps/textures are needed. Width and height are in
-         * pixels telling the size it will be drawn on screen and following them
-         * ensures that aspect ratio remains. But it's possible to return bitmap
-         * of any size though. You should use provided CurlPage for storing page
-         * information for requested page number.<br></br>
-         * <br></br>
-         * Index is a number between 0 and getBitmapCount() - 1.
-         */
-        fun updatePage(page: CurlPage, width: Int, height: Int, index: Int)
-    }
-
-    /**
-     * Simple holder for pointer position.
-     */
-    private inner class PointerPosition {
-        internal var mPos = PointF()
-        internal var mPressure: Float = 0.toFloat()
-    }
-
-    /**
-     * Observer interface for handling CurlView size changes.
-     */
-    interface SizeChangedObserver {
-
-        /**
-         * Called once CurlView size changes.
-         */
-        fun onSizeChanged(width: Int, height: Int)
-    }
-
-    interface CallBack {
-        fun pageChange(change: Int)
-    }
-
-    companion object {
-
-        // Curl state. We are flipping none, left or right page.
-        private const val CURL_LEFT = 1
-        private const val CURL_NONE = 0
-        private const val CURL_RIGHT = 2
-
-        // Constants for mAnimationTargetEvent.
-        private const val SET_CURL_TO_LEFT = 1
-        private const val SET_CURL_TO_RIGHT = 2
-
-        // Shows one page at the center of view.
-        const val SHOW_ONE_PAGE = 1
-        // Shows two pages side by side.
-        const val SHOW_TWO_PAGES = 2
-    }
-
-}

app/src/main/java/io/legado/app/ui/book/read/page/delegate/HorizontalPageDelegate.kt

@@ -39,11 +39,7 @@ abstract class HorizontalPageDelegate(pageView: PageView) : PageDelegate(pageVie
             }
         }
         if (isMoved) {
-            isCancel = if (pageView.isScrollDelegate) {
+            isCancel = if (direction == Direction.NEXT) distanceX < 0 else distanceX > 0
-                if (direction == Direction.NEXT) distanceY < 0 else distanceY > 0
-            } else {
-                if (direction == Direction.NEXT) distanceX < 0 else distanceX > 0
-            }
             isRunning = true
             //设置触摸点
             setTouchPoint(e2.x, e2.y)

app/src/main/java/io/legado/app/ui/book/read/page/delegate/PageDelegate.kt

@@ -69,7 +69,7 @@ abstract class PageDelegate(protected val pageView: PageView) {
     var isRunning = false
     var isStarted = false
 
-    protected fun setStartPoint(x: Float, y: Float, invalidate: Boolean = true) {
+    open fun setStartPoint(x: Float, y: Float, invalidate: Boolean = true) {
         startX = x
         startY = y
 
@@ -78,7 +78,7 @@ abstract class PageDelegate(protected val pageView: PageView) {
         }
     }
 
-    protected fun setTouchPoint(x: Float, y: Float, invalidate: Boolean = true) {
+    open fun setTouchPoint(x: Float, y: Float, invalidate: Boolean = true) {
         touchX = x
         touchY = y
 

app/src/main/java/io/legado/app/ui/book/read/page/delegate/ScrollPageDelegate.kt

@@ -109,11 +109,7 @@ class ScrollPageDelegate(pageView: PageView) : PageDelegate(pageView) {
             curPage?.dispatchTouchEvent(e2)
         }
         if (isMoved) {
-            isCancel = if (pageView.isScrollDelegate) {
+            isCancel = if (direction == Direction.NEXT) distanceY < 0 else distanceY > 0
-                if (direction == Direction.NEXT) distanceY < 0 else distanceY > 0
-            } else {
-                if (direction == Direction.NEXT) distanceX < 0 else distanceX > 0
-            }
             isRunning = true
             //设置触摸点
             setTouchPoint(e2.x, e2.y)

app/src/main/java/io/legado/app/ui/book/read/page/delegate/SimulationPageDelegate.kt

@@ -1,126 +1,526 @@
 package io.legado.app.ui.book.read.page.delegate
 
-import android.graphics.Canvas
+import android.graphics.*
-import android.view.MotionEvent
+import android.graphics.drawable.GradientDrawable
+import android.os.Build
 import io.legado.app.ui.book.read.page.PageView
-import io.legado.app.ui.book.read.page.curl.CurlPage
+import kotlin.math.*
-import io.legado.app.ui.book.read.page.curl.CurlView
-import io.legado.app.utils.screenshot
-import kotlin.math.abs
 
-class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageView),
+class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageView) {
-    CurlView.CallBack {
 
-    var curlView: CurlView? = null
+    private var mCornerX = 1 // 拖拽点对应的页脚
+
+    private var mCornerY = 1
+    private val mPath0: Path = Path()
+    private val mPath1: Path = Path()
+    // 贝塞尔曲线起始点
+    private val mBezierStart1 = PointF()
+    // 贝塞尔曲线控制点
+    private val mBezierControl1 = PointF()
+    // 贝塞尔曲线顶点
+    private val mBezierVertex1 = PointF()
+    // 贝塞尔曲线结束点
+    private var mBezierEnd1 = PointF()
+
+    // 另一条贝塞尔曲线
+    private val mBezierStart2 = PointF()
+
+    private val mBezierControl2 = PointF()
+    private val mBezierVertex2 = PointF()
+    private var mBezierEnd2 = PointF()
+
+    private var mMiddleX = 0f
+    private var mMiddleY = 0f
+    private var mDegrees = 0f
+    private var mTouchToCornerDis = 0f
+    private var mColorMatrixFilter: ColorMatrixColorFilter? = null
+    private val mMatrix: Matrix = Matrix()
+    private val mMatrixArray = floatArrayOf(0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f, 1.0f)
+
+    // 是否属于右上左下
+    private var mIsRT_LB = false
+    private var mMaxLength = 0f
+    // 背面颜色组
+    private var mBackShadowColors: IntArray? = null
+    // 前面颜色组
+    private var mFrontShadowColors: IntArray? = null
+    // 有阴影的GradientDrawable
+    private var mBackShadowDrawableLR: GradientDrawable? = null
+    private var mBackShadowDrawableRL: GradientDrawable? = null
+    private var mFolderShadowDrawableLR: GradientDrawable? = null
+    private var mFolderShadowDrawableRL: GradientDrawable? = null
+
+    private var mFrontShadowDrawableHBT: GradientDrawable? = null
+    private var mFrontShadowDrawableHTB: GradientDrawable? = null
+    private var mFrontShadowDrawableVLR: GradientDrawable? = null
+    private var mFrontShadowDrawableVRL: GradientDrawable? = null
+
+    private val mPaint: Paint = Paint()
 
     init {
-        pageView.curlView ?: let {
+        mMaxLength = hypot(pageView.width.toDouble(), pageView.height.toDouble()).toFloat()
-            curlView = CurlView(pageView.context)
+        mPaint.style = Paint.Style.FILL
-            pageView.curlView = curlView
+        //设置颜色数组
-            pageView.addView(curlView)
+        createDrawable()
-            curlView?.mPageProvider = PageProvider()
+        val cm = ColorMatrix()
-            curlView?.setSizeChangedObserver(SizeChangedObserver())
+        val array = floatArrayOf(
-            curlView?.callBack = this
+            1f, 0f, 0f, 0f, 0f, 0f, 1f, 0f, 0f, 0f,
-        }
+            0f, 0f, 1f, 0f, 0f, 0f, 0f, 0f, 1f, 0f
+        )
+        cm.set(array)
+        mColorMatrixFilter = ColorMatrixColorFilter(cm)
     }
 
-    override fun onTouch(event: MotionEvent): Boolean {
+    override fun setStartPoint(x: Float, y: Float, invalidate: Boolean) {
-        when (event.action) {
+        super.setStartPoint(x, y, invalidate)
-            MotionEvent.ACTION_DOWN -> {
+        calcCornerXY(x, y)
-                curlView?.currentIndex = 1
+    }
-            }
+
+    override fun setTouchPoint(x: Float, y: Float, invalidate: Boolean) {
+        super.setTouchPoint(x, y, invalidate)
+        //触摸y中间位置吧y变成屏幕高度
+        //触摸y中间位置吧y变成屏幕高度
+        if (startY > pageView.height / 3.0
+            && startY < pageView.height * 2 / 3.0
+            || direction == Direction.PREV
+        ) {
+            touchY = pageView.height.toFloat()
+        }
+
+        if (startY > pageView.height / 3.0
+            && startY < pageView.height / 2.0
+            && direction == Direction.NEXT
+        ) {
+            touchY = 1f
         }
-        curlView?.dispatchTouchEvent(event)
-        return super.onTouch(event)
     }
 
     override fun onScrollStart() {
-    }
+        val distanceX: Float
+        when (direction) {
+            Direction.NEXT -> distanceX =
+                if (isCancel) {
+                    var dis = viewWidth - startX + touchX
+                    if (dis > viewWidth) {
+                        dis = viewWidth.toFloat()
+                    }
+                    viewWidth - dis
+                } else {
+                    -(touchX + (viewWidth - startX))
+                }
+            else -> distanceX =
+                if (isCancel) {
+                    -(touchX - startX)
+                } else {
+                    viewWidth - (touchX - startX)
+                }
+        }
 
-    override fun onDraw(canvas: Canvas) {
+        startScroll(touchX.toInt(), 0, distanceX.toInt(), 0)
     }
 
     override fun onScrollStop() {
+        curPage?.x = 0.toFloat()
+        if (!isCancel) {
+            pageView.fillPage(direction)
+        }
     }
 
-    override fun onScroll(
+    override fun onDraw(canvas: Canvas) {
-        e1: MotionEvent,
+        bitmap?.let {
-        e2: MotionEvent,
+            if (direction === Direction.NEXT) {
-        distanceX: Float,
+                calcPoints()
-        distanceY: Float
+                drawCurrentPageArea(canvas, it, mPath0) //绘制翻页时的正面页
-    ): Boolean {
+                drawNextPageAreaAndShadow(canvas, it)
-        if (!isMoved) {
+                drawCurrentPageShadow(canvas)
-            val event = e1.toAction(MotionEvent.ACTION_UP)
+                drawCurrentBackArea(canvas, it)
-            curPage?.dispatchTouchEvent(event)
+            } else {
-            event.recycle()
+                calcPoints()
-            if (abs(distanceX) > abs(distanceY)) {
+                drawCurrentPageArea(canvas, it, mPath0)
-                if (distanceX < 0) {
+                drawNextPageAreaAndShadow(canvas, it)
-                    //如果上一页不存在
+                drawCurrentPageShadow(canvas)
-                    if (!hasPrev()) {
+                drawCurrentBackArea(canvas, it)
-                        noNext = true
-                        return true
-                    }
-                    //上一页截图
-                    bitmap = prevPage?.screenshot()
-                } else {
-                    //如果不存在表示没有下一页了
-                    if (!hasNext()) {
-                        noNext = true
-                        return true
-                    }
-                    //下一页截图
-                    bitmap = nextPage?.screenshot()
-                }
-                isMoved = true
             }
         }
-        if (isMoved) {
+    }
-            curlView?.canDraw = true
+
-            isCancel = if (pageView.isScrollDelegate) {
+    /**
-                if (direction == Direction.NEXT) distanceY < 0 else distanceY > 0
+     * 创建阴影的GradientDrawable
+     */
+    private fun createDrawable() {
+        val color = intArrayOf(0x333333, -0x4fcccccd)
+        mFolderShadowDrawableRL = GradientDrawable(
+            GradientDrawable.Orientation.RIGHT_LEFT, color
+        ).apply { gradientType = GradientDrawable.LINEAR_GRADIENT }
+        mFolderShadowDrawableLR = GradientDrawable(
+            GradientDrawable.Orientation.LEFT_RIGHT, color
+        ).apply { gradientType = GradientDrawable.LINEAR_GRADIENT }
+        mBackShadowColors = intArrayOf(-0xeeeeef, 0x111111)
+        mBackShadowDrawableRL = GradientDrawable(
+            GradientDrawable.Orientation.RIGHT_LEFT, mBackShadowColors
+        ).apply { gradientType = GradientDrawable.LINEAR_GRADIENT }
+        mBackShadowDrawableLR = GradientDrawable(
+            GradientDrawable.Orientation.LEFT_RIGHT, mBackShadowColors
+        ).apply { gradientType = GradientDrawable.LINEAR_GRADIENT }
+        mFrontShadowColors = intArrayOf(-0x7feeeeef, 0x111111)
+        mFrontShadowDrawableVLR = GradientDrawable(
+            GradientDrawable.Orientation.LEFT_RIGHT, mFrontShadowColors
+        ).apply { gradientType = GradientDrawable.LINEAR_GRADIENT }
+        mFrontShadowDrawableVRL = GradientDrawable(
+            GradientDrawable.Orientation.RIGHT_LEFT, mFrontShadowColors
+        ).apply { gradientType = GradientDrawable.LINEAR_GRADIENT }
+        mFrontShadowDrawableHTB = GradientDrawable(
+            GradientDrawable.Orientation.TOP_BOTTOM, mFrontShadowColors
+        ).apply { gradientType = GradientDrawable.LINEAR_GRADIENT }
+        mFrontShadowDrawableHBT = GradientDrawable(
+            GradientDrawable.Orientation.BOTTOM_TOP, mFrontShadowColors
+        ).apply { gradientType = GradientDrawable.LINEAR_GRADIENT }
+    }
+
+    /**
+     * 绘制翻起页背面
+     */
+    private fun drawCurrentBackArea(
+        canvas: Canvas,
+        bitmap: Bitmap
+    ) {
+        val i = (mBezierStart1.x + mBezierControl1.x).toInt() / 2
+        val f1 = abs(i - mBezierControl1.x)
+        val i1 = (mBezierStart2.y + mBezierControl2.y).toInt() / 2
+        val f2 = abs(i1 - mBezierControl2.y)
+        val f3 = min(f1, f2)
+        mPath1.reset()
+        mPath1.moveTo(mBezierVertex2.x, mBezierVertex2.y)
+        mPath1.lineTo(mBezierVertex1.x, mBezierVertex1.y)
+        mPath1.lineTo(mBezierEnd1.x, mBezierEnd1.y)
+        mPath1.lineTo(touchX, touchY)
+        mPath1.lineTo(mBezierEnd2.x, mBezierEnd2.y)
+        mPath1.close()
+        val mFolderShadowDrawable: GradientDrawable
+        val left: Int
+        val right: Int
+        if (mIsRT_LB) {
+            left = (mBezierStart1.x - 1).toInt()
+            right = (mBezierStart1.x + f3 + 1).toInt()
+            mFolderShadowDrawable = mFolderShadowDrawableLR!!
+        } else {
+            left = (mBezierStart1.x - f3 - 1).toInt()
+            right = (mBezierStart1.x + 1).toInt()
+            mFolderShadowDrawable = mFolderShadowDrawableRL!!
+        }
+        canvas.save()
+        try {
+            canvas.clipPath(mPath0)
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                canvas.clipPath(mPath1)
             } else {
-                if (direction == Direction.NEXT) distanceX < 0 else distanceX > 0
+                canvas.clipPath(mPath1, Region.Op.INTERSECT)
             }
-            isRunning = true
+        } catch (ignored: Exception) {
-            //设置触摸点
-            setTouchPoint(e2.x, e2.y)
         }
-        return isMoved
+        mPaint.colorFilter = mColorMatrixFilter
+        val dis = hypot(
+            mCornerX - mBezierControl1.x.toDouble(),
+            mBezierControl2.y - mCornerY.toDouble()
+        ).toFloat()
+        val f8 = (mCornerX - mBezierControl1.x) / dis
+        val f9 = (mBezierControl2.y - mCornerY) / dis
+        mMatrixArray[0] = 1 - 2 * f9 * f9
+        mMatrixArray[1] = 2 * f8 * f9
+        mMatrixArray[3] = mMatrixArray[1]
+        mMatrixArray[4] = 1 - 2 * f8 * f8
+        mMatrix.reset()
+        mMatrix.setValues(mMatrixArray)
+        mMatrix.preTranslate(-mBezierControl1.x, -mBezierControl1.y)
+        mMatrix.postTranslate(mBezierControl1.x, mBezierControl1.y)
+        canvas.drawBitmap(bitmap, mMatrix, mPaint)
+        mPaint.colorFilter = null
+        canvas.rotate(mDegrees, mBezierStart1.x, mBezierStart1.y)
+        mFolderShadowDrawable.setBounds(
+            left, mBezierStart1.y.toInt(), right,
+            (mBezierStart1.y + mMaxLength).toInt()
+        )
+        mFolderShadowDrawable.draw(canvas)
+        canvas.restore()
     }
 
-    override fun onPageUp() {
+    /**
-        curlView?.updatePages()
+     * 绘制翻起页的阴影
-        curlView?.requestRender()
+     */
+    private fun drawCurrentPageShadow(canvas: Canvas) {
+        val degree: Double = if (mIsRT_LB) {
+            (Math.PI / 4 - atan2(mBezierControl1.y - touchX, touchY - mBezierControl1.x))
+        } else {
+            (Math.PI / 4 - atan2(touchY - mBezierControl1.y, touchX - mBezierControl1.x))
+        }
+        // 翻起页阴影顶点与touch点的距离
+        val d1 = 25.toFloat() * 1.414 * cos(degree)
+        val d2 = 25.toFloat() * 1.414 * sin(degree)
+        val x = (touchX + d1).toFloat()
+        val y: Float
+        y = if (mIsRT_LB) {
+            (touchY + d2).toFloat()
+        } else {
+            (touchY - d2).toFloat()
+        }
+        mPath1.reset()
+        mPath1.moveTo(x, y)
+        mPath1.lineTo(touchX, touchY)
+        mPath1.lineTo(mBezierControl1.x, mBezierControl1.y)
+        mPath1.lineTo(mBezierStart1.x, mBezierStart1.y)
+        mPath1.close()
+        canvas.save()
+        try {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                canvas.clipOutPath(mPath0)
+            } else {
+                canvas.clipPath(mPath0, Region.Op.XOR)
+            }
+            canvas.clipPath(mPath1, Region.Op.INTERSECT)
+        } catch (ignored: java.lang.Exception) {
+        }
+        var leftX: Int
+        var rightX: Int
+        var mCurrentPageShadow: GradientDrawable
+        if (mIsRT_LB) {
+            leftX = mBezierControl1.x.toInt()
+            rightX = mBezierControl1.x.toInt() + 25
+            mCurrentPageShadow = mFrontShadowDrawableVLR!!
+        } else {
+            leftX = (mBezierControl1.x - 25).toInt()
+            rightX = mBezierControl1.x.toInt() + 1
+            mCurrentPageShadow = mFrontShadowDrawableVRL!!
+        }
+        var rotateDegrees: Float =
+            Math.toDegrees(atan2(touchX - mBezierControl1.x, mBezierControl1.y - touchY).toDouble())
+                .toFloat()
+        canvas.rotate(rotateDegrees, mBezierControl1.x, mBezierControl1.y)
+        mCurrentPageShadow.setBounds(
+            leftX,
+            (mBezierControl1.y - mMaxLength).toInt(), rightX,
+            mBezierControl1.y.toInt()
+        )
+        mCurrentPageShadow.draw(canvas)
+        canvas.restore()
+        mPath1.reset()
+        mPath1.moveTo(x, y)
+        mPath1.lineTo(touchX, touchY)
+        mPath1.lineTo(mBezierControl2.x, mBezierControl2.y)
+        mPath1.lineTo(mBezierStart2.x, mBezierStart2.y)
+        mPath1.close()
+        canvas.save()
+        try {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                canvas.clipOutPath(mPath0)
+            } else {
+                canvas.clipPath(mPath0, Region.Op.XOR)
+            }
+            canvas.clipPath(mPath1)
+        } catch (ignored: java.lang.Exception) {
+        }
+        if (mIsRT_LB) {
+            leftX = mBezierControl2.y.toInt()
+            rightX = (mBezierControl2.y + 25).toInt()
+            mCurrentPageShadow = mFrontShadowDrawableHTB!!
+        } else {
+            leftX = (mBezierControl2.y - 25).toInt()
+            rightX = (mBezierControl2.y + 1).toInt()
+            mCurrentPageShadow = mFrontShadowDrawableHBT!!
+        }
+        rotateDegrees = Math.toDegrees(
+            atan2(mBezierControl2.y - touchY, mBezierControl2.x - touchX).toDouble()
+        ).toFloat()
+        canvas.rotate(rotateDegrees, mBezierControl2.x, mBezierControl2.y)
+        val temp: Float =
+            if (mBezierControl2.y < 0) mBezierControl2.y - pageView.height else mBezierControl2.y
+        val hmg = hypot(mBezierControl2.x.toDouble(), temp.toDouble()).toInt()
+        if (hmg > mMaxLength) mCurrentPageShadow
+            .setBounds(
+                (mBezierControl2.x - 25).toInt() - hmg, leftX,
+                (mBezierControl2.x + mMaxLength).toInt() - hmg,
+                rightX
+            ) else mCurrentPageShadow.setBounds(
+            (mBezierControl2.x - mMaxLength).toInt(), leftX,
+            mBezierControl2.x.toInt(), rightX
+        )
+        mCurrentPageShadow.draw(canvas)
+        canvas.restore()
     }
 
-    override fun pageChange(change: Int) {
+    private fun drawNextPageAreaAndShadow(
-        pageView.post {
+        canvas: Canvas,
-            if (change > 0) {
+        bitmap: Bitmap
-                pageView.moveToNextPage()
+    ) {
+        mPath1.reset()
+        mPath1.moveTo(mBezierStart1.x, mBezierStart1.y)
+        mPath1.lineTo(mBezierVertex1.x, mBezierVertex1.y)
+        mPath1.lineTo(mBezierVertex2.x, mBezierVertex2.y)
+        mPath1.lineTo(mBezierStart2.x, mBezierStart2.y)
+        mPath1.lineTo(mCornerX.toFloat(), mCornerY.toFloat())
+        mPath1.close()
+        mDegrees = Math.toDegrees(
+            atan2(
+                (mBezierControl1.x - mCornerX).toDouble(),
+                mBezierControl2.y - mCornerY.toDouble()
+            )
+        ).toFloat()
+        val leftX: Int
+        val rightY: Int
+        val mBackShadowDrawable: GradientDrawable
+        if (mIsRT_LB) { //左下及右上
+            leftX = mBezierStart1.x.toInt()
+            rightY = (mBezierStart1.x + mTouchToCornerDis / 4).toInt()
+            mBackShadowDrawable = mBackShadowDrawableLR!!
+        } else {
+            leftX = (mBezierStart1.x - mTouchToCornerDis / 4).toInt()
+            rightY = mBezierStart1.x.toInt()
+            mBackShadowDrawable = mBackShadowDrawableRL!!
+        }
+        canvas.save()
+        try {
+            canvas.clipPath(mPath0)
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                canvas.clipPath(mPath1)
             } else {
-                pageView.moveToPrevPage()
+                canvas.clipPath(mPath1, Region.Op.INTERSECT)
             }
+            //canvas.clipPath(mPath1, Region.Op.INTERSECT);
+        } catch (ignored: java.lang.Exception) {
         }
+        canvas.drawBitmap(bitmap, 0f, 0f, null)
+        canvas.rotate(mDegrees, mBezierStart1.x, mBezierStart1.y)
+        mBackShadowDrawable.setBounds(
+            leftX, mBezierStart1.y.toInt(), rightY,
+            (mMaxLength + mBezierStart1.y).toInt()
+        ) //左上及右下角的xy坐标值,构成一个矩形
+        mBackShadowDrawable.draw(canvas)
+        canvas.restore()
     }
 
-    private inner class PageProvider : CurlView.PageProvider {
+    private fun drawCurrentPageArea(
+        canvas: Canvas,
+        bitmap: Bitmap,
+        path: Path
+    ) {
+        mPath0.reset()
+        mPath0.moveTo(mBezierStart1.x, mBezierStart1.y)
+        mPath0.quadTo(
+            mBezierControl1.x, mBezierControl1.y, mBezierEnd1.x,
+            mBezierEnd1.y
+        )
+        mPath0.lineTo(touchX, touchY)
+        mPath0.lineTo(mBezierEnd2.x, mBezierEnd2.y)
+        mPath0.quadTo(
+            mBezierControl2.x, mBezierControl2.y, mBezierStart2.x,
+            mBezierStart2.y
+        )
+        mPath0.lineTo(mCornerX.toFloat(), mCornerY.toFloat())
+        mPath0.close()
+        canvas.save()
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            canvas.clipOutPath(path)
+        } else {
+            canvas.clipPath(path, Region.Op.XOR)
+        }
+        canvas.drawBitmap(bitmap, 0f, 0f, null)
+        try {
+            canvas.restore()
+        } catch (e: java.lang.Exception) {
+            e.printStackTrace()
+        }
+    }
 
-        override val pageCount: Int
+    /**
-            get() = 3
+     * 计算拖拽点对应的拖拽脚
+     */
+    private fun calcCornerXY(x: Float, y: Float) {
+        mCornerX = if (x <= pageView.width / 2.0) {
+            0
+        } else {
+            pageView.width
+        }
+        mCornerY = if (y <= pageView.height / 2.0) {
+            0
+        } else {
+            pageView.height
+        }
+        mIsRT_LB = (mCornerX == 0 && mCornerY == pageView.height
+                || mCornerX == pageView.width && mCornerY == 0)
+    }
 
-        override fun updatePage(page: CurlPage, width: Int, height: Int, index: Int) {
+    private fun calcPoints() {
-            when (index) {
+        mMiddleX = (touchX + mCornerX) / 2
-                0 -> page.setTexture(prevPage?.screenshot(), CurlPage.SIDE_BOTH)
+        mMiddleY = (touchY + mCornerY) / 2
-                1 -> page.setTexture(curPage?.screenshot(), CurlPage.SIDE_BOTH)
+        mBezierControl1.x =
-                2 -> page.setTexture(nextPage?.screenshot(), CurlPage.SIDE_BOTH)
+            mMiddleX - (mCornerY - mMiddleY) * (mCornerY - mMiddleY) / (mCornerX - mMiddleX)
+        mBezierControl1.y = mCornerY.toFloat()
+        mBezierControl2.x = mCornerX.toFloat()
+        val f4 = mCornerY - mMiddleY
+        if (f4 == 0f) {
+            mBezierControl2.y = mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / 0.1f
+        } else {
+            mBezierControl2.y =
+                mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / (mCornerY - mMiddleY)
+        }
+        mBezierStart1.x = mBezierControl1.x - (mCornerX - mBezierControl1.x) / 2
+        mBezierStart1.y = mCornerY.toFloat()
+        // 当mBezierStart1.x < 0或者mBezierStart1.x > 480时
+        // 如果继续翻页，会出现BUG故在此限制
+        if (touchX > 0 && touchX < pageView.width) {
+            if (mBezierStart1.x < 0 || mBezierStart1.x > pageView.width) {
+                if (mBezierStart1.x < 0) mBezierStart1.x = pageView.width - mBezierStart1.x
+                val f1: Float = abs(mCornerX - touchX)
+                val f2: Float = pageView.width * f1 / mBezierStart1.x
+                touchX = abs(mCornerX - f2)
+                val f3: Float = abs(mCornerX - touchX) * abs(mCornerY - touchX) / f1
+                touchX = abs(mCornerY - f3)
+                mMiddleX = (touchX + mCornerX) / 2
+                mMiddleY = (touchY + mCornerY) / 2
+                mBezierControl1.x =
+                    mMiddleX - (mCornerY - mMiddleY) * (mCornerY - mMiddleY) / (mCornerX - mMiddleX)
+                mBezierControl1.y = mCornerY.toFloat()
+                mBezierControl2.x = mCornerX.toFloat()
+                val f5 = mCornerY - mMiddleY
+                if (f5 == 0f) {
+                    mBezierControl2.y =
+                        mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / 0.1f
+                } else {
+                    mBezierControl2.y =
+                        mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / (mCornerY - mMiddleY)
+                }
+                mBezierStart1.x = (mBezierControl1.x
+                        - (mCornerX - mBezierControl1.x) / 2)
             }
         }
+        mBezierStart2.x = mCornerX.toFloat()
+        mBezierStart2.y = mBezierControl2.y - (mCornerY - mBezierControl2.y) / 2
+        mTouchToCornerDis = hypot(touchX - mCornerX, touchY - mCornerY)
+        mBezierEnd1 = getCross(
+            PointF(touchX, touchY), mBezierControl1, mBezierStart1,
+            mBezierStart2
+        )
+        mBezierEnd2 = getCross(
+            PointF(touchX, touchY), mBezierControl2, mBezierStart1,
+            mBezierStart2
+        )
+        mBezierVertex1.x = (mBezierStart1.x + 2 * mBezierControl1.x + mBezierEnd1.x) / 4
+        mBezierVertex1.y = (2 * mBezierControl1.y + mBezierStart1.y + mBezierEnd1.y) / 4
+        mBezierVertex2.x = (mBezierStart2.x + 2 * mBezierControl2.x + mBezierEnd2.x) / 4
+        mBezierVertex2.y = (2 * mBezierControl2.y + mBezierStart2.y + mBezierEnd2.y) / 4
     }
 
-    // 定义书籍尺寸的变化监听器
+    /**
-    private inner class SizeChangedObserver : CurlView.SizeChangedObserver {
+     * 求解直线P1P2和直线P3P4的交点坐标
-        override fun onSizeChanged(width: Int, height: Int) {
+     */
-            curlView?.setViewMode(CurlView.SHOW_ONE_PAGE)
+    private fun getCross(P1: PointF, P2: PointF, P3: PointF, P4: PointF): PointF {
-        }
+        val crossP = PointF()
+        // 二元函数通式： y=ax+b
+        val a1 = (P2.y - P1.y) / (P2.x - P1.x)
+        val b1 = (P1.x * P2.y - P2.x * P1.y) / (P1.x - P2.x)
+        val a2 = (P4.y - P3.y) / (P4.x - P3.x)
+        val b2 = (P3.x * P4.y - P4.x * P3.y) / (P3.x - P4.x)
+        crossP.x = (b2 - b1) / (a1 - a2)
+        crossP.y = a1 * crossP.x + b1
+        return crossP
     }
 }

app/src/main/java/io/legado/app/ui/book/source/edit/BookSourceEditActivity.kt

@@ -91,7 +91,7 @@ class BookSourceEditActivity :
                 GSON.toJson(getSource())?.let { sourceStr ->
                     try {
                         val textIntent = Intent(Intent.ACTION_SEND)
-                        textIntent.setType("text/plain")
+                        textIntent.type = "text/plain"
                         textIntent.putExtra(Intent.EXTRA_TEXT, sourceStr)
                         startActivity(Intent.createChooser(textIntent, "Source Share"))
                     } catch (e: Exception) {

app/src/main/java/io/legado/app/ui/book/source/manage/BookSourceViewModel.kt

@@ -149,9 +149,11 @@ class BookSourceViewModel(application: Application) : BaseViewModel(application)
                 importSource(file.readText(), finally)
             } else {
                 withContext(Dispatchers.Main) {
-                    finally("文件无法打开")
+                    finally("打开文件出错")
                 }
             }
+        }.onError {
+            finally(it.localizedMessage ?: "打开文件出错")
         }
     }
 
@@ -194,7 +196,7 @@ class BookSourceViewModel(application: Application) : BaseViewModel(application)
                 else -> "格式不对"
             }
         }.onError {
-            finally(it.localizedMessage)
+            finally(it.localizedMessage ?: "")
         }.onSuccess {
             finally(it ?: "导入完成")
         }

app/src/main/java/io/legado/app/ui/chapterlist/ChapterListFragment.kt

@@ -13,6 +13,7 @@ import io.legado.app.R
 import io.legado.app.base.VMBaseFragment
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
+import io.legado.app.lib.theme.backgroundColor
 import io.legado.app.utils.getViewModelOfActivity
 import kotlinx.android.synthetic.main.fragment_chapter_list.*
 import org.jetbrains.anko.sdk27.listeners.onClick
@@ -58,6 +59,7 @@ class ChapterListFragment : VMBaseFragment<ChapterListViewModel>(R.layout.fragme
     }
 
     private fun initView() {
+        ll_chapter_base_info.setBackgroundColor(backgroundColor)
         iv_chapter_top.onClick { recycler_view.scrollToPosition(0) }
         iv_chapter_bottom.onClick {
             if (adapter.itemCount > 0) {

app/src/main/java/io/legado/app/ui/config/WebDavConfigFragment.kt

@@ -1,9 +1,13 @@
 package io.legado.app.ui.config
 
+import android.app.Activity.RESULT_OK
+import android.content.Intent
+import android.net.Uri
 import android.os.Build
 import android.os.Bundle
 import android.text.InputType
 import android.view.View
+import androidx.documentfile.provider.DocumentFile
 import androidx.preference.EditTextPreference
 import androidx.preference.ListPreference
 import androidx.preference.Preference
@@ -20,13 +24,26 @@ import io.legado.app.lib.dialogs.noButton
 import io.legado.app.lib.dialogs.yesButton
 import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.accentColor
+import io.legado.app.utils.DocumentUtils
 import io.legado.app.utils.LogUtils
 import io.legado.app.utils.applyTint
 import io.legado.app.utils.getPrefString
+import kotlinx.coroutines.*
+import kotlinx.coroutines.Dispatchers.IO
+import org.jetbrains.anko.toast
+import kotlin.coroutines.CoroutineContext
 
-class WebDavConfigFragment : PreferenceFragmentCompat(), Preference.OnPreferenceChangeListener {
+class WebDavConfigFragment : PreferenceFragmentCompat(),
+    Preference.OnPreferenceChangeListener,
+    CoroutineScope {
+    lateinit var job: Job
+    private val oldDataRequestCode = 23156
+
+    override val coroutineContext: CoroutineContext
+        get() = job + Dispatchers.Main
 
     override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        job = Job()
         fun bindPreferenceSummaryToValue(preference: Preference?) {
             preference?.apply {
                 onPreferenceChangeListener = this@WebDavConfigFragment
@@ -64,6 +81,11 @@ class WebDavConfigFragment : PreferenceFragmentCompat(), Preference.OnPreference
         ATH.applyEdgeEffectColor(listView)
     }
 
+    override fun onDestroy() {
+        super.onDestroy()
+        job.cancel()
+    }
+
     override fun onPreferenceChange(preference: Preference?, newValue: Any?): Boolean {
         when {
             preference?.key == "web_dav_password" -> if (newValue == null) {
@@ -105,7 +127,18 @@ class WebDavConfigFragment : PreferenceFragmentCompat(), Preference.OnPreference
                     WebDavHelp.showRestoreDialog(requireContext())
                 }
                 .request()
-            "import_old" -> needInstallApps {
+            "import_old" -> importOldData()
+        }
+        return super.onPreferenceTreeClick(preference)
+    }
+
+    private fun importOldData() {
+        try {
+            val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE)
+            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+            startActivityForResult(intent, oldDataRequestCode)
+        } catch (e: Exception) {
+            needInstallApps {
                 alert(title = "导入") {
                     message = "是否导入旧版本数据"
                     yesButton {
@@ -122,12 +155,59 @@ class WebDavConfigFragment : PreferenceFragmentCompat(), Preference.OnPreference
                 }.show().applyTint()
             }
         }
-        return super.onPreferenceTreeClick(preference)
+    }
+
+    private fun importOldData(uri: Uri) {
+        launch(IO) {
+            DocumentFile.fromTreeUri(requireContext(), uri)?.listFiles()?.forEach {
+                when (it.name) {
+                    "myBookShelf.json" ->
+                        try {
+                            DocumentUtils.readText(requireContext(), it.uri)?.let { json ->
+                                val importCount = Restore.importOldBookshelf(json)
+                                withContext(Dispatchers.Main) {
+                                    requireContext().toast("成功导入书籍${importCount}")
+                                }
+                            }
+                        } catch (e: java.lang.Exception) {
+                            withContext(Dispatchers.Main) {
+                                requireContext().toast("导入书籍失败\n${e.localizedMessage}")
+                            }
+                        }
+                    "myBookSource.json" ->
+                        try {
+                            DocumentUtils.readText(requireContext(), it.uri)?.let { json ->
+                                val importCount = Restore.importOldSource(json)
+                                withContext(Dispatchers.Main) {
+                                    requireContext().toast("成功导入书源${importCount}")
+                                }
+                            }
+                        } catch (e: Exception) {
+                            withContext(Dispatchers.Main) {
+                                requireContext().toast("导入源失败\n${e.localizedMessage}")
+                            }
+                        }
+                    "myBookReplaceRule.json" ->
+                        try {
+                            DocumentUtils.readText(requireContext(), it.uri)?.let { json ->
+                                val importCount = Restore.importOldReplaceRule(json)
+                                withContext(Dispatchers.Main) {
+                                    requireContext().toast("成功导入替换规则${importCount}")
+                                }
+                            }
+                        } catch (e: Exception) {
+                            withContext(Dispatchers.Main) {
+                                requireContext().toast("导入替换规则失败\n${e.localizedMessage}")
+                            }
+                        }
+                }
+            }
+        }
     }
 
     private fun needInstallApps(callback: () -> Unit) {
 
-        fun canRequestPackageInstalls() :Boolean {
+        fun canRequestPackageInstalls(): Boolean {
             if (Build.VERSION.SDK_INT > Build.VERSION_CODES.P) {
                 return requireContext().packageManager.canRequestPackageInstalls()
             }
@@ -143,8 +223,19 @@ class WebDavConfigFragment : PreferenceFragmentCompat(), Preference.OnPreference
                 }
             }.show().applyTint()
         } else {
-            LogUtils.d("xxx","import old")
+            LogUtils.d("xxx", "import old")
             callback()
         }
     }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        when (requestCode) {
+            oldDataRequestCode ->
+                if (resultCode == RESULT_OK) data?.data?.let { uri ->
+                    importOldData(uri)
+                }
+
+        }
+    }
 }

app/src/main/java/io/legado/app/ui/download/DownloadActivity.kt

@@ -1,25 +1,57 @@
 package io.legado.app.ui.download
 
 import android.os.Bundle
+import android.view.Menu
+import android.view.MenuItem
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.Observer
 import androidx.recyclerview.widget.LinearLayoutManager
+import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.base.BaseActivity
+import io.legado.app.constant.Bus
 import io.legado.app.data.entities.Book
+import io.legado.app.service.help.Download
+import io.legado.app.utils.applyTint
+import io.legado.app.utils.observeEvent
 import kotlinx.android.synthetic.main.activity_download.*
+import kotlinx.coroutines.Dispatchers.IO
+import kotlinx.coroutines.launch
 
 
 class DownloadActivity : BaseActivity(R.layout.activity_download) {
 
     lateinit var adapter: DownloadAdapter
     private var bookshelfLiveData: LiveData<List<Book>>? = null
+    private var menu: Menu? = null
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
         initRecyclerView()
         initLiveData()
     }
 
+    override fun onCompatCreateOptionsMenu(menu: Menu): Boolean {
+        menuInflater.inflate(R.menu.download, menu)
+        this.menu = menu
+        return super.onCompatCreateOptionsMenu(menu)
+    }
+
+    override fun onCompatOptionsItemSelected(item: MenuItem): Boolean {
+        when (item.itemId) {
+            R.id.menu_download -> launch(IO) {
+                App.db.bookDao().webBooks.forEach { book ->
+                    Download.start(
+                        this@DownloadActivity,
+                        book.bookUrl,
+                        book.durChapterIndex,
+                        book.totalChapterNum
+                    )
+                }
+            }
+        }
+        return super.onCompatOptionsItemSelected(item)
+    }
+
     private fun initRecyclerView() {
         recycler_view.layoutManager = LinearLayoutManager(this)
         adapter = DownloadAdapter(this)
@@ -28,8 +60,22 @@ class DownloadActivity : BaseActivity(R.layout.activity_download) {
 
     private fun initLiveData() {
         bookshelfLiveData?.removeObservers(this)
+        bookshelfLiveData = App.db.bookDao().observeDownload()
         bookshelfLiveData?.observe(this, Observer {
             adapter.setItems(it)
         })
     }
+
+    override fun observeLiveBus() {
+        observeEvent<Boolean>(Bus.UP_DOWNLOAD) {
+            if (it) {
+                menu?.findItem(R.id.menu_download)?.setIcon(R.drawable.ic_stop_black_24dp)
+                menu?.applyTint(this)
+                adapter.notifyItemRangeChanged(0, adapter.itemCount, true)
+            } else {
+                menu?.findItem(R.id.menu_download)?.setIcon(R.drawable.ic_play_24dp)
+                menu?.applyTint(this)
+            }
+        }
+    }
 }

app/src/main/java/io/legado/app/ui/download/DownloadAdapter.kt

@@ -1,18 +1,36 @@
 package io.legado.app.ui.download
 
 import android.content.Context
+import android.view.View
 import io.legado.app.R
 import io.legado.app.base.adapter.ItemViewHolder
 import io.legado.app.base.adapter.SimpleRecyclerAdapter
 import io.legado.app.data.entities.Book
+import io.legado.app.help.BookHelp
+import kotlinx.android.synthetic.main.item_download.view.*
 
 
 class DownloadAdapter(context: Context) :
     SimpleRecyclerAdapter<Book>(context, R.layout.item_download) {
 
-
     override fun convert(holder: ItemViewHolder, item: Book, payloads: MutableList<Any>) {
+        with(holder.itemView) {
+            if (payloads.isEmpty()) {
+                tv_name.text = item.name
+                tv_author.text = item.author
+                upDownloadCount(this, item)
+            } else {
+                upDownloadCount(this, item)
+            }
+        }
+    }
 
+    private fun upDownloadCount(view: View, book: Book) {
+        view.tv_download.text = context.getString(
+            R.string.download_count,
+            BookHelp.getChapterCount(book),
+            book.totalChapterNum
+        )
     }
 
 }

app/src/main/java/io/legado/app/ui/main/MainActivity.kt

@@ -1,8 +1,12 @@
 package io.legado.app.ui.main
 
+import android.app.Activity
+import android.content.Intent
+import android.net.Uri
 import android.os.Bundle
 import android.view.KeyEvent
 import android.view.MenuItem
+import androidx.documentfile.provider.DocumentFile
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentManager
 import androidx.fragment.app.FragmentStatePagerAdapter
@@ -13,7 +17,12 @@ import io.legado.app.BuildConfig
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.Bus
+import io.legado.app.constant.PreferKey
+import io.legado.app.help.permission.Permissions
+import io.legado.app.help.permission.PermissionsCompat
 import io.legado.app.help.storage.Backup
+import io.legado.app.help.storage.Restore
+import io.legado.app.help.storage.WebDavHelp
 import io.legado.app.lib.theme.ATH
 import io.legado.app.service.BaseReadAloudService
 import io.legado.app.service.help.ReadAloud
@@ -28,7 +37,8 @@ import kotlinx.android.synthetic.main.activity_main.*
 class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
     BottomNavigationView.OnNavigationItemSelectedListener,
     ViewPager.OnPageChangeListener by ViewPager.SimpleOnPageChangeListener() {
-
+    private val backupSelectRequestCode = 4567489
+    private val restoreSelectRequestCode = 654872
     override val viewModel: MainViewModel
         get() = getViewModel(MainViewModel::class.java)
 
@@ -137,6 +147,86 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
         }
     }
 
+    fun backup() {
+        val backupPath = getPrefString(PreferKey.backupPath)
+        if (backupPath?.isEmpty() == true) {
+            selectBackupFolder()
+        } else {
+            val uri = Uri.parse(backupPath)
+            val doc = DocumentFile.fromTreeUri(this, uri)
+            if (doc?.canWrite() == true) {
+                Backup.backup(this, uri)
+            } else {
+                selectBackupFolder()
+            }
+        }
+    }
+
+    fun restore() {
+        PermissionsCompat.Builder(this)
+            .addPermissions(*Permissions.Group.STORAGE)
+            .rationale(R.string.tip_perm_request_storage)
+            .onGranted { WebDavHelp.showRestoreDialog(this) }
+            .request()
+    }
+
+    fun restore(uri: Uri) {
+
+    }
+
+    private fun selectBackupFolder() {
+        try {
+            val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE)
+            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+            startActivityForResult(intent, backupSelectRequestCode)
+        } catch (e: java.lang.Exception) {
+            PermissionsCompat.Builder(this)
+                .addPermissions(*Permissions.Group.STORAGE)
+                .rationale(R.string.tip_perm_request_storage)
+                .onGranted { Backup.backup() }
+                .request()
+        }
+    }
+
+    private fun selectRestoreFolder() {
+        try {
+            val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE)
+            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+            startActivityForResult(intent, restoreSelectRequestCode)
+        } catch (e: java.lang.Exception) {
+            PermissionsCompat.Builder(this)
+                .addPermissions(*Permissions.Group.STORAGE)
+                .rationale(R.string.tip_perm_request_storage)
+                .onGranted { Restore.restore() }
+                .request()
+        }
+    }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        when (requestCode) {
+            backupSelectRequestCode -> if (resultCode == Activity.RESULT_OK) {
+                data?.data?.let { uri ->
+                    contentResolver.takePersistableUriPermission(
+                        uri,
+                        Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
+                    )
+                    putPrefString(PreferKey.backupPath, uri.toString())
+                    Backup.backup(this, uri)
+                }
+            }
+            restoreSelectRequestCode -> if (resultCode == Activity.RESULT_OK) {
+                data?.data?.let { uri ->
+                    contentResolver.takePersistableUriPermission(
+                        uri,
+                        Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
+                    )
+                    putPrefString(PreferKey.backupPath, uri.toString())
+                }
+            }
+        }
+    }
+
     private inner class TabFragmentPageAdapter internal constructor(fm: FragmentManager) :
         FragmentStatePagerAdapter(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT) {
 
@@ -154,4 +244,3 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
 
     }
 }
-

app/src/main/java/io/legado/app/ui/main/MainViewModel.kt

@@ -4,7 +4,14 @@ import android.app.Application
 import io.legado.app.App
 import io.legado.app.base.BaseViewModel
 import io.legado.app.constant.Bus
+import io.legado.app.data.api.IHttpGetApi
+import io.legado.app.data.entities.RssSource
+import io.legado.app.help.http.HttpHelper
+import io.legado.app.help.storage.Restore
 import io.legado.app.model.WebBook
+import io.legado.app.utils.GSON
+import io.legado.app.utils.NetworkUtils
+import io.legado.app.utils.fromJsonObject
 import io.legado.app.utils.postEvent
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.delay
@@ -48,4 +55,24 @@ class MainViewModel(application: Application) : BaseViewModel(application) {
         }
     }
 
+    fun initRss() {
+        execute {
+            val url = "https://gitee.com/alanskycn/yuedu/raw/master/JS/RSS/rssSource"
+            NetworkUtils.getBaseUrl(url)?.let {
+                val response =
+                    HttpHelper.getApiService<IHttpGetApi>(it).getAsync(url, mapOf()).await()
+                response.body()?.let { body ->
+                    val sources = mutableListOf<RssSource>()
+                    val items: List<Map<String, Any>> = Restore.jsonPath.parse(body).read("$")
+                    for (item in items) {
+                        val jsonItem = Restore.jsonPath.parse(item)
+                        GSON.fromJsonObject<RssSource>(jsonItem.jsonString())?.let { source ->
+                            sources.add(source)
+                        }
+                    }
+                    App.db.rssSourceDao().insert(*sources.toTypedArray())
+                }
+            }
+        }
+    }
 }

app/src/main/java/io/legado/app/ui/main/bookshelf/BookshelfFragment.kt

@@ -19,6 +19,7 @@ import io.legado.app.lib.dialogs.selector
 import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.accentColor
 import io.legado.app.ui.book.search.SearchActivity
+import io.legado.app.ui.download.DownloadActivity
 import io.legado.app.utils.getPrefBoolean
 import io.legado.app.utils.getViewModel
 import io.legado.app.utils.putPrefInt
@@ -62,7 +63,7 @@ class BookshelfFragment : VMBaseFragment<BookshelfViewModel>(R.layout.fragment_b
             }
             R.id.menu_arrange_bookshelf -> {
             }
-            R.id.menu_download_all -> viewModel.downloadAll()
+            R.id.menu_download -> startActivity<DownloadActivity>()
         }
     }
 

app/src/main/java/io/legado/app/ui/main/bookshelf/BookshelfViewModel.kt

@@ -4,7 +4,6 @@ import android.app.Application
 import io.legado.app.App
 import io.legado.app.base.BaseViewModel
 import io.legado.app.data.entities.BookGroup
-import io.legado.app.service.help.Download
 
 class BookshelfViewModel(application: Application) : BaseViewModel(application) {
 
@@ -33,11 +32,4 @@ class BookshelfViewModel(application: Application) : BaseViewModel(application)
         }
     }
 
-    fun downloadAll() {
-        execute {
-            App.db.bookDao().webBooks.forEach { book ->
-                Download.start(context, book.bookUrl, book.durChapterIndex, book.totalChapterNum)
-            }
-        }
-    }
 }

app/src/main/java/io/legado/app/ui/main/explore/ExploreAdapter.kt

@@ -9,7 +9,6 @@ import io.legado.app.base.adapter.ItemViewHolder
 import io.legado.app.base.adapter.SimpleRecyclerAdapter
 import io.legado.app.data.entities.BookSource
 import io.legado.app.help.coroutine.Coroutine
-import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.accentColor
 import io.legado.app.utils.ACache
 import io.legado.app.utils.gone
@@ -29,7 +28,6 @@ class ExploreAdapter(context: Context, private val scope: CoroutineScope, val ca
     override fun convert(holder: ItemViewHolder, item: BookSource, payloads: MutableList<Any>) {
         with(holder.itemView) {
             if (payloads.isEmpty()) {
-                ATH.applyBackgroundTint(ll_title)
                 tv_name.text = item.bookSourceName
                 ll_title.onClick {
                     val oldEx = exIndex

app/src/main/java/io/legado/app/ui/main/my/MyFragment.kt

@@ -7,14 +7,12 @@ import android.view.MenuItem
 import android.view.View
 import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
+import androidx.preference.SwitchPreference
 import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.base.BaseFragment
+import io.legado.app.constant.Bus
 import io.legado.app.help.BookHelp
-import io.legado.app.help.permission.Permissions
-import io.legado.app.help.permission.PermissionsCompat
-import io.legado.app.help.storage.Backup
-import io.legado.app.help.storage.WebDavHelp
 import io.legado.app.lib.theme.ATH
 import io.legado.app.service.WebService
 import io.legado.app.ui.about.AboutActivity
@@ -22,11 +20,9 @@ import io.legado.app.ui.about.DonateActivity
 import io.legado.app.ui.book.source.manage.BookSourceActivity
 import io.legado.app.ui.config.ConfigActivity
 import io.legado.app.ui.config.ConfigViewModel
+import io.legado.app.ui.main.MainActivity
 import io.legado.app.ui.replacerule.ReplaceRuleActivity
-import io.legado.app.utils.LogUtils
+import io.legado.app.utils.*
-import io.legado.app.utils.getPrefBoolean
-import io.legado.app.utils.startActivity
-import io.legado.app.utils.toast
 import kotlinx.android.synthetic.main.view_title_bar.*
 import org.jetbrains.anko.startActivity
 
@@ -47,16 +43,14 @@ class MyFragment : BaseFragment(R.layout.fragment_my_config) {
     override fun onCompatOptionsItemSelected(item: MenuItem) {
         when (item.itemId) {
             R.id.menu_help -> startActivity<AboutActivity>()
-            R.id.menu_backup -> PermissionsCompat.Builder(this)
+            R.id.menu_backup -> {
-                .addPermissions(*Permissions.Group.STORAGE)
+                val activity = activity as? MainActivity
-                .rationale(R.string.tip_perm_request_storage)
+                activity?.backup()
-                .onGranted { Backup.backup() }
+            }
-                .request()
+            R.id.menu_restore -> {
-            R.id.menu_restore -> PermissionsCompat.Builder(this)
+                val activity = activity as? MainActivity
-                .addPermissions(*Permissions.Group.STORAGE)
+                activity?.restore()
-                .rationale(R.string.tip_perm_request_storage)
+            }
-                .onGranted { WebDavHelp.showRestoreDialog(requireContext()) }
-                .request()
         }
     }
 
@@ -64,7 +58,17 @@ class MyFragment : BaseFragment(R.layout.fragment_my_config) {
         SharedPreferences.OnSharedPreferenceChangeListener {
 
         override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+            if (WebService.isRun) {
+                putPrefBoolean("webService", true)
+            } else {
+                putPrefBoolean("webService", false)
+            }
             addPreferencesFromResource(R.xml.pref_main)
+            observeEvent<Boolean>(Bus.WEB_SERVICE_STOP) {
+                findPreference<SwitchPreference>("webService")?.let {
+                    it.isChecked = false
+                }
+            }
         }
 
         override fun onViewCreated(view: View, savedInstanceState: Bundle?) {

app/src/main/java/io/legado/app/ui/main/rss/RssFragment.kt

@@ -11,8 +11,10 @@ import io.legado.app.R
 import io.legado.app.base.BaseFragment
 import io.legado.app.data.entities.RssSource
 import io.legado.app.lib.theme.ATH
+import io.legado.app.ui.main.MainViewModel
 import io.legado.app.ui.rss.article.RssArticlesActivity
 import io.legado.app.ui.rss.source.manage.RssSourceActivity
+import io.legado.app.utils.getViewModelOfActivity
 import io.legado.app.utils.startActivity
 import kotlinx.android.synthetic.main.fragment_rss.*
 import kotlinx.android.synthetic.main.view_title_bar.*
@@ -50,6 +52,9 @@ class RssFragment : BaseFragment(R.layout.fragment_rss),
 
     private fun initData() {
         App.db.rssSourceDao().liveEnabled().observe(viewLifecycleOwner, Observer {
+            if (it.isEmpty()) {
+                getViewModelOfActivity(MainViewModel::class.java).initRss()
+            }
             adapter.setItems(it)
         })
     }

app/src/main/java/io/legado/app/ui/rss/read/ReadRssActivity.kt

@@ -1,6 +1,7 @@
 package io.legado.app.ui.rss.read
 
 import android.annotation.SuppressLint
+import android.content.Intent
 import android.os.Bundle
 import android.view.KeyEvent
 import android.view.Menu
@@ -15,6 +16,7 @@ import io.legado.app.lib.theme.primaryTextColor
 import io.legado.app.utils.NetworkUtils
 import io.legado.app.utils.getViewModel
 import kotlinx.android.synthetic.main.activity_rss_read.*
+import org.jetbrains.anko.toast
 
 class ReadRssActivity : VMBaseActivity<ReadRssViewModel>(R.layout.activity_rss_read),
     ReadRssViewModel.CallBack {
@@ -42,6 +44,9 @@ class ReadRssActivity : VMBaseActivity<ReadRssViewModel>(R.layout.activity_rss_r
     override fun onCompatOptionsItemSelected(item: MenuItem): Boolean {
         when (item.itemId) {
             R.id.menu_rss_star -> viewModel.star()
+            R.id.menu_share_it -> viewModel.rssArticle?.let {
+                shareText("链接分享", it.link)
+            }
         }
         return super.onCompatOptionsItemSelected(item)
     }
@@ -115,4 +120,15 @@ class ReadRssActivity : VMBaseActivity<ReadRssViewModel>(R.layout.activity_rss_r
         }
         return super.onKeyUp(keyCode, event)
     }
+
+    private fun shareText(title: String, text: String) {
+        try {
+            val textIntent = Intent(Intent.ACTION_SEND)
+            textIntent.type = "text/plain"
+            textIntent.putExtra(Intent.EXTRA_TEXT, text)
+            startActivity(Intent.createChooser(textIntent, title))
+        } catch (e: Exception) {
+            toast(R.string.can_not_share)
+        }
+    }
 }

app/src/main/java/io/legado/app/ui/rss/read/ReadRssViewModel.kt

@@ -78,16 +78,17 @@ class ReadRssViewModel(application: Application) : BaseViewModel(application) {
     }
 
     fun clHtml(content: String): String {
-        return """
+        return if (content.contains("<style>|style=".toRegex())) {
-            <html>
+            content
-            <head>
+        } else {
-                <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
+            """
-                <style>img{max-width:100% !important; width:auto; height:auto;}</style>
+                <style>
-            </head>
+                    img{max-width:100% !important; width:auto; height:auto;}
-            <body style:"height:auto;max-width: 100%; width:auto;">
+                    video{object-fit:fill; max-width:100% !important; width:auto; height:auto;}
-                $content
+                    body{word-wrap:break-word; height:auto;max-width: 100%; width:auto;}
-            </body></html>
+                </style>$content
-        """
+             """
+        }
     }
 
     interface CallBack {

app/src/main/java/io/legado/app/ui/rss/source/manage/RssSourceViewModel.kt

@@ -60,19 +60,20 @@ class RssSourceViewModel(application: Application) : BaseViewModel(application)
         }
     }
 
-   fun exportSelection(ids: LinkedHashSet<String>) {
+    fun exportSelection(ids: LinkedHashSet<String>) {
-       execute {
+        execute {
-               App.db.rssSourceDao().getRssSources(*ids.toTypedArray()).let {
+            App.db.rssSourceDao().getRssSources(*ids.toTypedArray()).let {
-               val json = GSON.toJson(it)
+                val json = GSON.toJson(it)
-               val file = FileHelp.getFile(Backup.exportPath + File.separator + "exportRssSource.json")
+                val file =
-               file.writeText(json)
+                    FileHelp.getFile(Backup.exportPath + File.separator + "exportRssSource.json")
-           }
+                file.writeText(json)
-       }.onSuccess {
+            }
-           context.toast("成功导出至\n${Backup.exportPath}")
+        }.onSuccess {
-       }.onError {
+            context.toast("成功导出至\n${Backup.exportPath}")
-           context.toast("导出失败\n${it.localizedMessage}")
+        }.onError {
-       }
+            context.toast("导出失败\n${it.localizedMessage}")
-   }
+        }
+    }
 
     fun addGroup(group: String) {
         execute {
@@ -165,7 +166,7 @@ class RssSourceViewModel(application: Application) : BaseViewModel(application)
                 else -> "格式不对"
             }
         }.onError {
-            finally(it.localizedMessage)
+            finally(it.localizedMessage ?: "")
         }.onSuccess {
             finally(it ?: "导入完成")
         }

app/src/main/java/io/legado/app/ui/widget/font/FontSelectDialog.kt

@@ -1,86 +1,221 @@
 package io.legado.app.ui.widget.font
 
 import android.annotation.SuppressLint
-import android.content.Context
+import android.app.Activity.RESULT_OK
+import android.content.Intent
+import android.net.Uri
+import android.os.Bundle
 import android.os.Environment
+import android.util.DisplayMetrics
 import android.view.LayoutInflater
+import android.view.MenuItem
 import android.view.View
-import androidx.appcompat.app.AlertDialog
+import android.view.ViewGroup
+import androidx.appcompat.widget.Toolbar
+import androidx.documentfile.provider.DocumentFile
+import androidx.fragment.app.DialogFragment
 import androidx.recyclerview.widget.LinearLayoutManager
+import io.legado.app.App
 import io.legado.app.R
-import io.legado.app.lib.dialogs.AlertBuilder
+import io.legado.app.constant.PreferKey
-import io.legado.app.lib.dialogs.alert
+import io.legado.app.help.FileHelp
-import io.legado.app.utils.applyTint
+import io.legado.app.help.permission.Permissions
-import io.legado.app.utils.invisible
+import io.legado.app.help.permission.PermissionsCompat
-import io.legado.app.utils.visible
+import io.legado.app.utils.DocumentUtils
-import kotlinx.android.synthetic.main.dialog_font_select.view.*
+import io.legado.app.utils.getPrefString
+import io.legado.app.utils.putPrefString
+import io.legado.app.utils.toast
+import kotlinx.android.synthetic.main.dialog_font_select.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers.IO
+import kotlinx.coroutines.Dispatchers.Main
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import java.io.File
+import kotlin.coroutines.CoroutineContext
 
-class FontSelectDialog(context: Context) : FontAdapter.CallBack {
+class FontSelectDialog : DialogFragment(),
-
+    Toolbar.OnMenuItemClickListener,
-    private val defaultFolder =
+    CoroutineScope,
-        Environment.getExternalStorageDirectory().absolutePath + File.separator + "Fonts"
+    FontAdapter.CallBack {
+    lateinit var job: Job
+    private val fontFolderRequestCode = 35485
     private lateinit var adapter: FontAdapter
-    private var builder: AlertBuilder<AlertDialog>
+    private val fontFolder =
-    private var dialog: AlertDialog? = null
+        App.INSTANCE.filesDir.absolutePath + File.separator + "Fonts" + File.separator
-    @SuppressLint("InflateParams")
+    override val coroutineContext: CoroutineContext
-    private var view: View = LayoutInflater.from(context).inflate(R.layout.dialog_font_select, null)
+        get() = job + Main
-    var curPath: String? = null
-    var fontFolder: String? = null
-    var defaultFont: (() -> Unit)? = null
-    var selectFile: ((path: String) -> Unit)? = null
 
-    init {
+    override fun onStart() {
-        builder = context.alert(title = context.getString(R.string.select_font)) {
+        super.onStart()
-            customView = view
+        val dm = DisplayMetrics()
-            positiveButton(R.string.default_font) { defaultFont?.invoke() }
+        activity?.windowManager?.defaultDisplay?.getMetrics(dm)
-            negativeButton(R.string.cancel)
+        dialog?.window?.setLayout((dm.widthPixels * 0.9).toInt(), (dm.heightPixels * 0.9).toInt())
-        }
-        initData()
     }
 
-    fun show() {
+    override fun onCreateView(
-        dialog = builder.show().applyTint()
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        job = Job()
+        return inflater.inflate(R.layout.dialog_font_select, container)
     }
 
-    private fun initData() = with(view) {
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
-        adapter = FontAdapter(context, this@FontSelectDialog)
+        super.onViewCreated(view, savedInstanceState)
+        tool_bar.setTitle(R.string.select_font)
+        tool_bar.inflateMenu(R.menu.font_select)
+        tool_bar.setOnMenuItemClickListener(this)
+        adapter = FontAdapter(requireContext(), this)
         recycler_view.layoutManager = LinearLayoutManager(context)
         recycler_view.adapter = adapter
-        val files = getFontFiles()
+
-        if (files.isNullOrEmpty()) {
+        val fontPath = getPrefString(PreferKey.fontFolder)
-            tv_no_data.visible()
+        if (fontPath.isNullOrEmpty()) {
+            openFolder()
         } else {
-            tv_no_data.invisible()
+            val uri = Uri.parse(fontPath)
-            adapter.setItems(files.toList())
+            if (DocumentFile.fromTreeUri(requireContext(), uri)?.canRead() == true) {
+                getFontFiles(uri)
+            } else {
+                openFolder()
+            }
+        }
+    }
+
+    override fun onMenuItemClick(item: MenuItem?): Boolean {
+        when (item?.itemId) {
+            R.id.menu_default -> {
+                val pf = parentFragment
+                if (pf is CallBack) {
+                    if ("" != pf.curFontPath) {
+                        pf.selectFile("")
+                    }
+                }
+                val activity = activity
+                if (activity is CallBack) {
+                    if ("" != activity.curFontPath) {
+                        activity.selectFile("")
+                    }
+                }
+                dismiss()
+            }
+            R.id.menu_other -> {
+                openFolder()
+            }
+        }
+        return true
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        job.cancel()
+    }
+
+    private fun openFolder() {
+        try {
+            val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE)
+            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+            startActivityForResult(intent, fontFolderRequestCode)
+        } catch (e: java.lang.Exception) {
+            PermissionsCompat.Builder(this)
+                .addPermissions(*Permissions.Group.STORAGE)
+                .rationale(R.string.tip_perm_request_storage)
+                .onGranted { getFontFilesOld() }
+                .request()
         }
     }
 
     @SuppressLint("DefaultLocale")
-    private fun getFontFiles(): Array<File>? {
+    private fun getFontFiles(uri: Uri) {
-        val path = if (fontFolder.isNullOrEmpty()) {
+        launch(IO) {
-            defaultFolder
+            DocumentFile.fromTreeUri(requireContext(), uri)?.listFiles()?.forEach { file ->
-        } else fontFolder
+                if (file.name?.toLowerCase()?.matches(".*\\.[ot]tf".toRegex()) == true) {
-        return try {
+                    DocumentUtils.readBytes(App.INSTANCE, file.uri)?.let {
-            val file = File(path)
+                        FileHelp.getFile(fontFolder + file.name).writeBytes(it)
+                    }
+                }
+            }
+            try {
+                val file = File(fontFolder)
+                file.listFiles { pathName ->
+                    pathName.name.toLowerCase().matches(".*\\.[ot]tf".toRegex())
+                }?.let {
+                    withContext(Main) {
+                        adapter.setItems(it.toList())
+                    }
+                }
+            } catch (e: Exception) {
+                toast(e.localizedMessage ?: "")
+            }
+        }
+    }
+
+    @SuppressLint("DefaultLocale")
+    private fun getFontFilesOld() {
+        try {
+            val file =
+                File(Environment.getExternalStorageDirectory().absolutePath + File.separator + "Fonts")
             file.listFiles { pathName ->
                 pathName.name.toLowerCase().matches(".*\\.[ot]tf".toRegex())
+            }?.let {
+                adapter.setItems(it.toList())
             }
         } catch (e: Exception) {
-            null
+            toast(e.localizedMessage ?: "")
         }
     }
 
     override fun onClick(file: File) {
         file.absolutePath.let {
-            if (it != curPath) {
+            val pf = parentFragment
-                selectFile?.invoke(it)
+            if (pf is CallBack) {
-                dialog?.dismiss()
+                if (it != pf.curFontPath) {
+                    pf.selectFile(it)
+                }
+            }
+            val activity = activity
+            if (activity is CallBack) {
+                if (it != activity.curFontPath) {
+                    activity.selectFile(it)
+                }
             }
         }
+        dialog?.dismiss()
     }
 
     override fun curFilePath(): String {
-        return curPath ?: ""
+        val pf = parentFragment
+        if (pf is CallBack) {
+            return pf.curFontPath
+        }
+        val activity = activity
+        if (activity is CallBack) {
+            return activity.curFontPath
+        }
+        return ""
+    }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+        when (requestCode) {
+            fontFolderRequestCode -> if (resultCode == RESULT_OK) {
+                data?.data?.let { uri ->
+                    putPrefString(PreferKey.fontFolder, uri.toString())
+                    context?.contentResolver?.takePersistableUriPermission(
+                        uri,
+                        Intent.FLAG_GRANT_READ_URI_PERMISSION
+                    )
+                    getFontFiles(uri)
+                }
+            }
+        }
+    }
+
+    interface CallBack {
+        fun selectFile(path: String)
+        val curFontPath: String
     }
 }

app/src/main/java/io/legado/app/utils/DocumentUtils.kt

@@ -0,0 +1,52 @@
+package io.legado.app.utils
+
+import android.content.Context
+import android.net.Uri
+
+object DocumentUtils {
+
+    @JvmStatic
+    fun writeText(context: Context, data: String, fileUri: Uri): Boolean {
+        return writeBytes(context, data.toByteArray(), fileUri)
+    }
+
+    @JvmStatic
+    fun writeBytes(context: Context, data: ByteArray, fileUri: Uri): Boolean {
+        try {
+            context.contentResolver.openOutputStream(fileUri)?.let {
+                it.write(data)
+                it.close()
+                return true
+            }
+        } catch (e: java.lang.Exception) {
+            e.printStackTrace()
+        }
+        return false
+    }
+
+    @JvmStatic
+    fun readText(context: Context, uri: Uri): String? {
+        readBytes(context, uri)?.let {
+            return String(it)
+        }
+        return null
+    }
+
+    @JvmStatic
+    fun readBytes(context: Context, uri: Uri): ByteArray? {
+        try {
+            context.contentResolver.openInputStream(uri)?.let {
+                val len: Int = it.available()
+                val buffer = ByteArray(len)
+                it.read(buffer)
+                it.close()
+                return buffer
+            }
+        } catch (e: Exception) {
+            e.printStackTrace()
+        }
+        return null
+    }
+
+
+}

app/src/main/res/drawable/bg_shadow_bottom.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <!--实现应用背景颜色渐变-->
+    <gradient
+        android:startColor="#17000000"
+        android:endColor="#00000000"
+        android:angle="90" />
+</shape>

app/src/main/res/drawable/bg_shadow_bottom_night.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <!--实现应用背景颜色渐变-->
+    <gradient
+        android:startColor="#17FFFFFF"
+        android:endColor="#00FFFFFF"
+        android:angle="90" />
+</shape>

app/src/main/res/drawable/bg_shadow_top.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <!--实现应用背景颜色渐变-->
+    <gradient
+        android:startColor="#17000000"
+        android:endColor="#00000000"
+        android:angle="270" />
+</shape>

app/src/main/res/drawable/bg_shadow_top_night.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <!--实现应用背景颜色渐变-->
+    <gradient
+        android:startColor="#17FFFFFF"
+        android:endColor="#00FFFFFF"
+        android:angle="270" />
+</shape>

app/src/main/res/drawable/side_nav_bar.xml

@@ -1,9 +0,0 @@
-<shape xmlns:android="http://schemas.android.com/apk/res/android"
-    android:shape="rectangle">
-    <gradient
-        android:angle="135"
-        android:centerColor="#009688"
-        android:endColor="#00695C"
-        android:startColor="#4DB6AC"
-        android:type="linear" />
-</shape>

app/src/main/res/layout/dialog_font_select.xml

@@ -1,20 +1,18 @@
 <?xml version="1.0" encoding="utf-8"?>
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="vertical"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:padding="16dp">
 
-    <androidx.recyclerview.widget.RecyclerView
+    <androidx.appcompat.widget.Toolbar
-        android:id="@+id/recycler_view"
+        android:id="@+id/tool_bar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content" />
 
-    <TextView
+    <androidx.recyclerview.widget.RecyclerView
-        android:id="@+id/tv_no_data"
+        android:id="@+id/recycler_view"
         android:layout_width="match_parent"
-        android:layout_height="wrap_content"
+        android:layout_height="match_parent" />
-        android:padding="16dp"
-        android:text="@string/fonts_folder" />
 
-</FrameLayout>
+</LinearLayout>

app/src/main/res/layout/item_download.xml

@@ -2,6 +2,22 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="vertical"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="wrap_content"
+    android:padding="16dp">
+
+    <TextView
+        android:id="@+id/tv_name"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+
+    <TextView
+        android:id="@+id/tv_author"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
+
+    <TextView
+        android:id="@+id/tv_download"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content" />
 
 </LinearLayout>

app/src/main/res/layout/item_find_book.xml

@@ -18,11 +18,9 @@
         android:paddingTop="6dp"
         android:paddingBottom="6dp"
         android:layout_margin="4dp"
-        android:background="@color/background"
+        android:background="@color/btn_bg_press"
-        android:elevation="3dp"
         android:orientation="horizontal"
-        android:gravity="center_vertical"
+        android:gravity="center_vertical">
-        tools:ignore="UseCompoundDrawables">
 
         <TextView
             android:id="@+id/tv_name"

app/src/main/res/menu/download.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item
+        android:id="@+id/menu_download"
+        android:title="@string/action_download"
+        android:icon="@drawable/ic_play_24dp"
+        app:showAsAction="ifRoom" />
+
+</menu>

app/src/main/res/menu/font_select.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item
+        android:id="@+id/menu_default"
+        android:title="@string/default_font"
+        app:showAsAction="ifRoom" />
+
+    <item
+        android:id="@+id/menu_other"
+        android:title="@string/other_folder"
+        app:showAsAction="never" />
+
+</menu>

app/src/main/res/menu/main_bookshelf.xml

@@ -21,9 +21,9 @@
         app:showAsAction="never" />
 
     <item
-        android:id="@+id/menu_download_all"
+        android:id="@+id/menu_download"
         android:icon="@drawable/ic_download_line"
-        android:title="@string/download_all"
+        android:title="@string/download_offline"
         app:showAsAction="never" />
 
     <item

app/src/main/res/menu/rss_read.xml

@@ -8,4 +8,10 @@
         android:icon="@drawable/ic_star_border"
         app:showAsAction="always" />
 
+    <item
+        android:id="@+id/menu_share_it"
+        android:title="@string/share"
+        android:icon="@drawable/ic_menu_share"
+        app:showAsAction="ifRoom" />
+
 </menu>

app/src/main/res/values-night/colors.xml

@@ -13,9 +13,11 @@
     <color name="transparent30">#30ffffff</color>
 
     <color name="bg_divider_line">#363636</color>
-    <color name="btn_bg_press">#804D4D4D</color>
+
-    <color name="btn_bg_press_2">#80686868</color>
+    <color name="btn_bg_press">#634D4D4D</color>
-    <color name="btn_bg_press_tp">#80C7C7C7</color>
+    <color name="btn_bg_press_2">#63686868</color>
+    <color name="btn_bg_press_tp">#63C7C7C7</color>
+
     <color name="darker_gray">#66666666</color>
 
     <color name="tv_btn_normal_black">#737373</color>

app/src/main/res/values/colors.xml

@@ -23,9 +23,9 @@
 
     <color name="highlight">#d3321b</color>
 
-    <color name="btn_bg_press">#80ACACAC</color>
+    <color name="btn_bg_press">#63ACACAC</color>
-    <color name="btn_bg_press_2">#80858585</color>
+    <color name="btn_bg_press_2">#63858585</color>
-    <color name="btn_bg_press_tp">#802C2C2C</color>
+    <color name="btn_bg_press_tp">#632C2C2C</color>
 
     <color name="tv_btn_normal_black">#737373</color>
     <color name="tv_btn_press_black">#adadad</color>

app/src/main/res/values/strings.xml

@@ -45,7 +45,7 @@
     <string name="receiving_shared_label">阅读·搜索</string>
     <string name="bookshelf_empty">书架还空着，先去添加吧！</string>
     <string name="action_search">搜索</string>
-    <string name="action_download">下载任务</string>
+    <string name="action_download">下载</string>
     <string name="layout_list">列表视图</string>
     <string name="layout_grid3">网格视图三列</string>
     <string name="layout_grid4">网格视图四列</string>
@@ -96,6 +96,7 @@
     <string name="pt_auto_download">自动下载最新章节</string>
     <string name="ps_auto_download">更新书籍时自动下载最新章节</string>
     <string name="backup_restore">备份与恢复</string>
+    <string name="web_dav_set">WebDav设置</string>
     <string name="web_dav_set_import_old">WebDav设置/导入旧版本数据</string>
     <string name="backup">备份</string>
     <string name="restore">恢复</string>
@@ -208,6 +209,7 @@
     <string name="download_start">开始下载</string>
     <string name="download_cancel">取消下载</string>
     <string name="no_download">暂无任务</string>
+    <string name="download_count">已下载 %d/%d</string>
     <string name="import_select_book">导入选择书籍</string>
     <string name="update_search_threads_num">更新和搜索线程数,如感觉卡顿请减小线程数,量力而行</string>
     <string name="change_icon">切换图标</string>
@@ -576,5 +578,6 @@
     <string name="no_group">未分组</string>
     <string name="prev_sentence">上一句</string>
     <string name="next_sentence">下一句</string>
+    <string name="other_folder">其它目录</string>
 
 </resources>

app/src/main/res/xml/pref_config_web_dav.xml

@@ -2,23 +2,29 @@
 <androidx.preference.PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
 
-    <androidx.preference.EditTextPreference
+    <io.legado.app.lib.theme.prefs.ATEPreferenceCategory
-        android:key="web_dav_url"
+        android:title="@string/web_dav_set"
-        android:title="WebDav 服务器地址"
+        app:iconSpaceReserved="false">
-        android:summary="@string/web_dav_url_s"
+
-        app:iconSpaceReserved="false" />
+        <androidx.preference.EditTextPreference
-
+            android:key="web_dav_url"
-    <androidx.preference.EditTextPreference
+            android:title="WebDav 服务器地址"
-        android:key="web_dav_account"
+            android:summary="@string/web_dav_url_s"
-        android:title="WebDav 账号"
+            app:iconSpaceReserved="false" />
-        android:summary="@string/web_dav_account_s"
+
-        app:iconSpaceReserved="false" />
+        <androidx.preference.EditTextPreference
-
+            android:key="web_dav_account"
-    <androidx.preference.EditTextPreference
+            android:title="WebDav 账号"
-        android:key="web_dav_password"
+            android:summary="@string/web_dav_account_s"
-        android:title="WebDav 密码"
+            app:iconSpaceReserved="false" />
-        android:summary="@string/web_dav_pw_s"
+
-        app:iconSpaceReserved="false" />
+        <androidx.preference.EditTextPreference
+            android:key="web_dav_password"
+            android:title="WebDav 密码"
+            android:summary="@string/web_dav_pw_s"
+            app:iconSpaceReserved="false" />
+
+    </io.legado.app.lib.theme.prefs.ATEPreferenceCategory>
 
     <io.legado.app.lib.theme.prefs.ATEPreferenceCategory app:iconSpaceReserved="false">