From 0b7e210051da8dc2d0a95020b791cd7dfb9c3c4d Mon Sep 17 00:00:00 2001
From: kunfei <gekunfei@live.com>
Date: Mon, 21 Oct 2019 10:13:55 +0800
Subject: [PATCH] up

---
 .../page/delegate/HorizontalPageDelegate.kt   |  3 --
 .../ui/widget/page/delegate/PageDelegate.kt   | 32 +++++++++++++++++--
 2 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/app/src/main/java/io/legado/app/ui/widget/page/delegate/HorizontalPageDelegate.kt b/app/src/main/java/io/legado/app/ui/widget/page/delegate/HorizontalPageDelegate.kt
index 1f0e377a2..1f2b3fa42 100644
--- a/app/src/main/java/io/legado/app/ui/widget/page/delegate/HorizontalPageDelegate.kt
+++ b/app/src/main/java/io/legado/app/ui/widget/page/delegate/HorizontalPageDelegate.kt
@@ -3,7 +3,6 @@ package io.legado.app.ui.widget.page.delegate
 import android.view.MotionEvent
 import io.legado.app.ui.widget.page.PageView
 import io.legado.app.utils.screenshot
-import io.legado.app.utils.snackbar
 import kotlin.math.abs
 
 abstract class HorizontalPageDelegate(pageView: PageView) : PageDelegate(pageView) {
@@ -23,7 +22,6 @@ abstract class HorizontalPageDelegate(pageView: PageView) : PageDelegate(pageVie
                     //如果上一页不存在
                     if (!hasPrev()) {
                         noNext = true
-                        pageView.snackbar("没有上一页")
                         return true
                     }
                     //上一页截图
@@ -32,7 +30,6 @@ abstract class HorizontalPageDelegate(pageView: PageView) : PageDelegate(pageVie
                     //如果不存在表示没有下一页了
                     if (!hasNext()) {
                         noNext = true
-                        pageView.snackbar("没有下一页")
                         return true
                     }
                     //下一页截图
diff --git a/app/src/main/java/io/legado/app/ui/widget/page/delegate/PageDelegate.kt b/app/src/main/java/io/legado/app/ui/widget/page/delegate/PageDelegate.kt
index b70a1ac6d..d094e4a82 100644
--- a/app/src/main/java/io/legado/app/ui/widget/page/delegate/PageDelegate.kt
+++ b/app/src/main/java/io/legado/app/ui/widget/page/delegate/PageDelegate.kt
@@ -8,9 +8,11 @@ import android.view.MotionEvent
 import android.widget.Scroller
 import androidx.annotation.CallSuper
 import androidx.interpolator.view.animation.FastOutLinearInInterpolator
+import com.google.android.material.snackbar.Snackbar
 import io.legado.app.ui.widget.page.ContentView
 import io.legado.app.ui.widget.page.PageView
 import io.legado.app.utils.screenshot
+import io.legado.app.utils.snackbar
 import kotlin.math.abs
 
 abstract class PageDelegate(protected val pageView: PageView) {
@@ -42,6 +44,8 @@ abstract class PageDelegate(protected val pageView: PageView) {
     protected var atTop: Boolean = false
     protected var atBottom: Boolean = false
 
+    private var snackbar: Snackbar? = null
+
     private val scroller: Scroller by lazy {
         Scroller(
             pageView.context,
@@ -285,12 +289,36 @@ abstract class PageDelegate(protected val pageView: PageView) {
     fun hasPrev(): Boolean {
         //上一页的参数配置
         direction = Direction.PREV
-        return pageView.pageFactory?.hasPrev() == true
+        val hasPrev = pageView.pageFactory?.hasPrev() == true
+        if (!hasPrev) {
+            snackbar ?: let {
+                snackbar = pageView.snackbar("没有上一页")
+            }
+            snackbar?.let {
+                if (!it.isShown) {
+                    it.setText("没有上一页")
+                    it.show()
+                }
+            }
+        }
+        return hasPrev
     }
 
     fun hasNext(): Boolean {
         //进行下一页的配置
         direction = Direction.NEXT
-        return pageView.pageFactory?.hasNext() == true
+        val hasNext = pageView.pageFactory?.hasNext() == true
+        if (!hasNext) {
+            snackbar ?: let {
+                snackbar = pageView.snackbar("没有下一页")
+            }
+            snackbar?.let {
+                if (!it.isShown) {
+                    it.setText("没有下一页")
+                    it.show()
+                }
+            }
+        }
+        return hasNext
     }
 }
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