正文图片添加长按缩放

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

@@ -16,6 +16,7 @@ import io.legado.app.ui.book.read.page.entities.TextLine
 import io.legado.app.ui.book.read.page.entities.TextPage
 import io.legado.app.ui.book.read.page.provider.ChapterProvider
 import io.legado.app.ui.book.read.page.provider.ImageProvider
+import io.legado.app.ui.widget.dialog.PhotoDialog
 import io.legado.app.utils.activity
 import io.legado.app.utils.getCompatColor
 import io.legado.app.utils.getPrefBoolean
@@ -213,74 +214,61 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
     ) {
         if (!selectAble) return
         if (!visibleRect.contains(x, y)) return
-        var relativeOffset = relativeOffset(0)
+        var relativeOffset: Float
-        for ((lineIndex, textLine) in textPage.textLines.withIndex()) {
+        for (relativePos in 0..2) {
+            relativeOffset = relativeOffset(relativePos)
+            if (relativePos > 0) {
+                //滚动翻页
+                if (!ReadBookConfig.isScroll) return
+                if (relativeOffset >= ChapterProvider.visibleHeight) return
+            }
+            val page = relativePage(relativePos)
+            for ((lineIndex, textLine) in page.textLines.withIndex()) {
                 if (y > textLine.lineTop + relativeOffset && y < textLine.lineBottom + relativeOffset) {
                     for ((charIndex, textChar) in textLine.textChars.withIndex()) {
                         if (x > textChar.start && x < textChar.end) {
-                        textChar.selected = true
+                            initSelect(
-                        invalidate()
+                                page.chapterIndex,
-                        selectStart[0] = 0
+                                relativePos,
-                        selectStart[1] = lineIndex
+                                textLine,
-                        selectStart[2] = charIndex
+                                textChar,
-                        selectEnd[0] = 0
+                                lineIndex,
-                        selectEnd[1] = lineIndex
+                                charIndex,
-                        selectEnd[2] = charIndex
+                                relativeOffset,
-                        upSelectedStart(
+                                select
-                            textChar.start,
-                            textLine.lineBottom + relativeOffset,
-                            textLine.lineTop + relativeOffset
                             )
-                        upSelectedEnd(textChar.end, textLine.lineBottom + relativeOffset)
-                        select(0, lineIndex, charIndex)
                             return
                         }
                     }
                     return
                 }
             }
-        if (!ReadBookConfig.isScroll) return
+
-        //滚动翻页
-        relativeOffset = relativeOffset(1)
-        if (relativeOffset >= ChapterProvider.visibleHeight) return
-        val nextPage = relativePage(1)
-        for ((lineIndex, textLine) in nextPage.textLines.withIndex()) {
-            if (y > textLine.lineTop + relativeOffset && y < textLine.lineBottom + relativeOffset) {
-                for ((charIndex, textChar) in textLine.textChars.withIndex()) {
-                    if (x > textChar.start && x < textChar.end) {
-                        textChar.selected = true
-                        invalidate()
-                        selectStart[0] = 1
-                        selectStart[1] = lineIndex
-                        selectStart[2] = charIndex
-                        selectEnd[0] = 1
-                        selectEnd[1] = lineIndex
-                        selectEnd[2] = charIndex
-                        upSelectedStart(
-                            textChar.start,
-                            textLine.lineBottom + relativeOffset,
-                            textLine.lineTop + relativeOffset
-                        )
-                        upSelectedEnd(textChar.end, textLine.lineBottom + relativeOffset)
-                        select(1, lineIndex, charIndex)
-                        return
-                    }
         }
-                return
+
     }
+
+    private fun initSelect(
+        chapterIndex: Int,
+        relativePage: Int,
+        textLine: TextLine,
+        textChar: TextChar,
+        lineIndex: Int,
+        charIndex: Int,
+        relativeOffset: Float,
+        select: (relativePage: Int, lineIndex: Int, charIndex: Int) -> Unit
+    ) {
+        if (textChar.isImage) {
+            activity?.supportFragmentManager?.let {
+                PhotoDialog.show(it, chapterIndex, textChar.charData)
             }
-        relativeOffset = relativeOffset(2)
+        } else {
-        if (relativeOffset >= ChapterProvider.visibleHeight) return
-        for ((lineIndex, textLine) in relativePage(2).textLines.withIndex()) {
-            if (y > textLine.lineTop + relativeOffset && y < textLine.lineBottom + relativeOffset) {
-                for ((charIndex, textChar) in textLine.textChars.withIndex()) {
-                    if (x > textChar.start && x < textChar.end) {
             textChar.selected = true
             invalidate()
-                        selectStart[0] = 2
+            selectStart[0] = relativePage
             selectStart[1] = lineIndex
             selectStart[2] = charIndex
-                        selectEnd[0] = 2
+            selectEnd[0] = relativePage
             selectEnd[1] = lineIndex
             selectEnd[2] = charIndex
             upSelectedStart(
@@ -289,12 +277,7 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
                 textLine.lineTop + relativeOffset
             )
             upSelectedEnd(textChar.end, textLine.lineBottom + relativeOffset)
-                        select(2, lineIndex, charIndex)
+            select(relativePage, lineIndex, charIndex)
-                        return
-                    }
-                }
-                return
-            }
         }
     }
 

app/src/main/java/io/legado/app/ui/widget/dialog/PhotoDialog.kt

@@ -0,0 +1,68 @@
+package io.legado.app.ui.widget.dialog
+
+import android.os.Bundle
+import android.util.DisplayMetrics
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.FragmentManager
+import io.legado.app.R
+import io.legado.app.base.BaseDialogFragment
+import io.legado.app.service.help.ReadBook
+import io.legado.app.ui.book.read.page.provider.ImageProvider
+import kotlinx.android.synthetic.main.dialog_photo_view.*
+
+
+class PhotoDialog : BaseDialogFragment() {
+
+    companion object {
+
+        fun show(
+            fragmentManager: FragmentManager,
+            chapterIndex: Int,
+            src: String
+        ) {
+            PhotoDialog().apply {
+                val bundle = Bundle()
+                bundle.putInt("chapterIndex", chapterIndex)
+                bundle.putString("src", src)
+                arguments = bundle
+            }.show(fragmentManager, "photoDialog")
+        }
+
+    }
+
+    override fun onStart() {
+        super.onStart()
+        val dm = DisplayMetrics()
+        activity?.windowManager?.defaultDisplay?.getMetrics(dm)
+        dialog?.window?.setLayout(
+            ViewGroup.LayoutParams.MATCH_PARENT,
+            ViewGroup.LayoutParams.MATCH_PARENT
+        )
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.dialog_photo_view, container)
+    }
+
+    override fun onFragmentCreated(view: View, savedInstanceState: Bundle?) {
+        arguments?.let {
+            val chapterIndex = it.getInt("chapterIndex")
+            val src = it.getString("src")
+            ReadBook.book?.let { book ->
+                src?.let {
+                    ImageProvider.getImage(book, chapterIndex, src)?.let { bitmap ->
+                        photo_view.setImageBitmap(bitmap)
+                    }
+                }
+            }
+        }
+
+    }
+
+}

app/src/main/java/io/legado/app/ui/widget/image/photo/Info.kt

@@ -0,0 +1,48 @@
+package io.legado.app.ui.widget.image.photo
+
+import android.graphics.PointF
+
+import android.graphics.RectF
+import android.widget.ImageView
+
+
+class Info(
+    rect: RectF,
+    img: RectF,
+    widget: RectF,
+    base: RectF,
+    screenCenter: PointF,
+    scale: Float,
+    degrees: Float,
+    scaleType: ImageView.ScaleType?
+) {
+    // 内部图片在整个手机界面的位置
+    var mRect = RectF()
+
+    // 控件在窗口的位置
+    var mImgRect = RectF()
+
+    var mWidgetRect = RectF()
+
+    var mBaseRect = RectF()
+
+    var mScreenCenter = PointF()
+
+    var mScale = 0f
+
+    var mDegrees = 0f
+
+    var mScaleType: ImageView.ScaleType? = null
+
+    init {
+        mRect.set(rect)
+        mImgRect.set(img)
+        mWidgetRect.set(widget)
+        mScale = scale
+        mScaleType = scaleType
+        mDegrees = degrees
+        mBaseRect.set(base)
+        mScreenCenter.set(screenCenter)
+    }
+
+}

app/src/main/java/io/legado/app/ui/widget/image/photo/RotateGestureDetector.kt

@@ -0,0 +1,56 @@
+package io.legado.app.ui.widget.image.photo
+
+import android.view.MotionEvent
+import kotlin.math.abs
+import kotlin.math.atan
+
+class RotateGestureDetector(l: OnRotateListener) {
+
+    private val MAX_DEGREES_STEP = 120
+
+    private val mListener: OnRotateListener? = null
+
+    private var mPrevSlope = 0f
+    private var mCurrSlope = 0f
+
+    private val x1 = 0f
+    private val y1 = 0f
+    private val x2 = 0f
+    private val y2 = 0f
+
+    fun onTouchEvent(event: MotionEvent) {
+
+        when (event.actionMasked) {
+            MotionEvent.ACTION_POINTER_DOWN,
+            MotionEvent.ACTION_POINTER_UP -> {
+                if (event.pointerCount == 2) mPrevSlope = caculateSlope(event)
+            }
+            MotionEvent.ACTION_MOVE -> if (event.pointerCount > 1) {
+                mCurrSlope = caculateSlope(event)
+
+                val currDegrees = Math.toDegrees(atan(mCurrSlope.toDouble()));
+                val prevDegrees = Math.toDegrees(atan(mPrevSlope.toDouble()));
+
+                val deltaSlope = currDegrees - prevDegrees;
+
+                if (abs(deltaSlope) <= MAX_DEGREES_STEP) {
+                    mListener?.onRotate(deltaSlope.toFloat(), (x2 + x1) / 2, (y2 + y1) / 2);
+                }
+                mPrevSlope = mCurrSlope;
+            }
+        }
+
+    }
+
+    private fun caculateSlope(event: MotionEvent): Float {
+        val x1 = event.getX(0);
+        val y1 = event.getY(0);
+        val x2 = event.getX(1);
+        val y2 = event.getY(1);
+        return (y2 - y1) / (x2 - x1);
+    }
+}
+
+interface OnRotateListener {
+    fun onRotate(degrees: Float, focusX: Float, focusY: Float)
+}

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

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/background">
+
+    <io.legado.app.ui.widget.image.PhotoView
+        android:id="@+id/photo_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:scaleType="centerInside" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
+
+