up

app/src/main/java/io/legado/app/ui/widget/page/TextPageFactory.kt

@@ -39,7 +39,9 @@ class TextPageFactory private constructor(dataSource: DataSource) :
 
     override fun moveToNext(): Boolean = dataSource.pageIndex().let { index ->
         return if (hasNext()) {
-            if (dataSource.getCurrentChapter()?.isLastIndex(index) == true) {
+            if (dataSource.getCurrentChapter()?.isLastIndex(index) == true
+                || dataSource.isScrollDelegate()
+            ) {
                 dataSource.moveToNextChapter()
             } else {
                 dataSource.setPageIndex(index.plus(1))
@@ -51,10 +53,10 @@ class TextPageFactory private constructor(dataSource: DataSource) :
 
     override fun moveToPrevious(): Boolean = dataSource.pageIndex().let { index ->
         return if (hasPrev()) {
-            if (index > 0) {
-                dataSource.setPageIndex(index.minus(1))
-            } else {
+            if (index <= 0 || dataSource.isScrollDelegate()) {
                 dataSource.moveToPrevChapter()
+            } else {
+                dataSource.setPageIndex(index.minus(1))
             }
             true
         } else

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

@@ -176,7 +176,7 @@ abstract class PageDelegate(protected val pageView: PageView) {
     /**
      * 触摸事件处理
      */
-    fun onTouch(event: MotionEvent): Boolean {
+    open fun onTouch(event: MotionEvent): Boolean {
         if (isStarted) return false
         if (curPage?.isTextSelected() == true) {
             curPage?.dispatchTouchEvent(event)
@@ -278,8 +278,35 @@ abstract class PageDelegate(protected val pageView: PageView) {
             if (pageView.isScrollDelegate()) {
                 //传递触摸事件到textView
                 curPage?.dispatchTouchEvent(e2)
+                if (!isMoved && abs(distanceX) < abs(distanceY)) {
+                    if (distanceY < 0) {
+                        //上一页的参数配置
+                        direction = Direction.PREV
+                        //判断是否上一页存在
+                        val hasPrev = pageView.hasPrev()
+                        //如果上一页不存在
+                        if (!hasPrev) {
+                            noNext = true
+                            return true
                         }
-            if (!isMoved && abs(distanceX) > abs(distanceY)) {
+                        //上一页截图
+                        bitmap = prevPage?.screenshot()
+                    } else {
+                        //进行下一页的配置
+                        direction = Direction.NEXT
+                        //判断是否下一页存在
+                        val hasNext = pageView.hasNext()
+                        //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
+                }
+            } else if (!isMoved && abs(distanceX) > abs(distanceY)) {
                 if (distanceX < 0) {
                     //上一页的参数配置
                     direction = Direction.PREV
@@ -308,7 +335,11 @@ abstract class PageDelegate(protected val pageView: PageView) {
                 isMoved = true
             }
             if (isMoved) {
-                isCancel = if (direction == Direction.NEXT) distanceX < 0 else distanceX > 0
+                isCancel = if (pageView.isScrollDelegate()) {
+                    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/widget/page/delegate/ScrollPageDelegate.kt

@@ -1,21 +1,78 @@
 package io.legado.app.ui.widget.page.delegate
 
 import android.graphics.Canvas
+import android.graphics.Matrix
+import android.view.MotionEvent
 import io.legado.app.ui.widget.page.PageView
 
 class ScrollPageDelegate(pageView: PageView) : PageDelegate(pageView) {
+    private var atTop: Boolean = false
+    private var atBottom: Boolean = false
+    private val bitmapMatrix = Matrix()
+
+    override fun onTouch(event: MotionEvent): Boolean {
+        if (event.action == MotionEvent.ACTION_DOWN) {
+            curPage?.contentTextView()?.let {
+                atTop = it.atTop()
+                atBottom = it.atBottom()
+            }
+        }
+        return super.onTouch(event)
+    }
 
     override fun onScrollStart() {
+        if (!atTop && !atBottom) {
+            stopScroll()
+            return
+        }
+        val distanceY: Float
+        when (direction) {
+            Direction.NEXT -> if (isCancel) {
+                var dis = viewHeight - startY + touchY
+                if (dis > viewHeight) {
+                    dis = viewHeight.toFloat()
+                }
+                distanceY = viewHeight - dis
+            } else {
+                distanceY = -(touchY + (viewHeight - startY))
+            }
+            else -> distanceY = if (isCancel) {
+                -(touchY - startY)
+            } else {
+                viewWidth - (touchY - startY)
+            }
+        }
 
+        startScroll(0, touchY.toInt(), 0, distanceY.toInt())
     }
 
     override fun onDraw(canvas: Canvas) {
+        if (atTop || atBottom) {
+            val offsetY = touchY - startY
 
+            if ((direction == Direction.NEXT && offsetY > 0)
+                || (direction == Direction.PREV && offsetY < 0)
+            ) return
+
+            val distanceY = if (offsetY > 0) offsetY - viewHeight else offsetY + viewHeight
+            if (atTop && direction == Direction.PREV) {
+                bitmap?.let {
+                    bitmapMatrix.setTranslate(0.toFloat(), distanceY)
+                    canvas.drawBitmap(it, bitmapMatrix, null)
+                }
+            } else if (atBottom && direction == Direction.NEXT) {
+                bitmap?.let {
+                    bitmapMatrix.setTranslate(0.toFloat(), distanceY)
+                    canvas.drawBitmap(it, bitmapMatrix, null)
+                }
+            }
+        }
     }
 
     override fun onScrollStop() {
-
+        if (!isCancel) {
+            pageView.fillPage(direction)
+        }
     }
-
 
 }