Merge pull request #18 from gedoor/master

get update

app/src/main/assets/updateLog.md

@@ -2,6 +2,9 @@
 * 旧版数据导入教程：
 * 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】。
 
+**2020/02/25**
+* 优化文本选择和滚动,感觉很完美了
+
 **2020/02/24**
 * 滚动暂时可以滚了,先这样吧,头大
 * 紧急修复朗读报错的bug

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

@@ -14,19 +14,19 @@ interface BookSourceDao {
     @Query("select * from book_sources where bookSourceName like :searchKey or bookSourceGroup like :searchKey or bookSourceUrl like :searchKey order by customOrder asc")
     fun liveDataSearch(searchKey: String = ""): LiveData<List<BookSource>>
 
-    @Query("select * from book_sources where enabled = 1 and enabledExplore = 1 and exploreUrl is not null and exploreUrl <> '' order by customOrder asc")
+    @Query("select * from book_sources where enabledExplore = 1 and trim(exploreUrl) <> '' order by customOrder asc")
     fun liveExplore(): LiveData<List<BookSource>>
 
-    @Query("select * from book_sources where enabled = 1 and enabledExplore = 1 and exploreUrl is not null and exploreUrl <> '' and (bookSourceGroup like :key or bookSourceName like :key) order by customOrder asc")
+    @Query("select * from book_sources where enabledExplore = 1 and trim(exploreUrl) <> '' and (bookSourceGroup like :key or bookSourceName like :key) order by customOrder asc")
     fun liveExplore(key: String): LiveData<List<BookSource>>
 
-    @Query("select bookSourceGroup from book_sources where bookSourceGroup is not null and bookSourceGroup <> ''")
+    @Query("select bookSourceGroup from book_sources where trim(bookSourceGroup) <> ''")
     fun liveGroup(): LiveData<List<String>>
 
-    @Query("select bookSourceGroup from book_sources where enabled = 1 and bookSourceGroup is not null and bookSourceGroup <> ''")
+    @Query("select bookSourceGroup from book_sources where enabled = 1 and trim(bookSourceGroup) <> ''")
     fun liveGroupEnabled(): LiveData<List<String>>
 
-    @Query("select bookSourceGroup from book_sources where enabled = 1 and enabledExplore = 1 and exploreUrl is not null and exploreUrl <> '' and bookSourceGroup is not null and bookSourceGroup <> ''")
+    @Query("select bookSourceGroup from book_sources where enabledExplore = 1 and trim(exploreUrl) <> '' and trim(bookSourceGroup) <> ''")
     fun liveGroupExplore(): LiveData<List<String>>
 
     @Query("select distinct  enabled from book_sources where bookSourceName like :searchKey or bookSourceGroup like :searchKey or bookSourceUrl like :searchKey")
@@ -41,7 +41,7 @@ interface BookSourceDao {
     @Query("select * from book_sources where enabled = 1 and bookSourceGroup like '%' || :group || '%'")
     fun getEnabledByGroup(group: String): List<BookSource>
 
-    @get:Query("select * from book_sources where bookUrlPattern is not null || bookUrlPattern <> ''")
+    @get:Query("select * from book_sources where trim(bookUrlPattern) <> ''")
     val hasBookUrlPattern: List<BookSource>
 
     @get:Query("select * from book_sources where bookSourceGroup is null or bookSourceGroup = ''")

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

@@ -28,7 +28,7 @@ interface RssSourceDao {
     @Query("SELECT * FROM rssSources where enabled = 1 order by customOrder")
     fun liveEnabled(): LiveData<List<RssSource>>
 
-    @Query("select sourceGroup from rssSources where sourceGroup is not null and sourceGroup <> ''")
+    @Query("select sourceGroup from rssSources where trim(sourceGroup) <> ''")
     fun liveGroup(): LiveData<List<String>>
 
     @get:Query("select min(customOrder) from rssSources")

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

@@ -8,7 +8,6 @@ import android.os.Bundle
 import android.os.Handler
 import android.view.*
 import android.view.ViewGroup.LayoutParams.WRAP_CONTENT
-import androidx.appcompat.view.menu.MenuItemImpl
 import androidx.core.view.get
 import androidx.core.view.isVisible
 import androidx.core.view.size
@@ -403,8 +402,8 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
     /**
      * 文本选择菜单操作
      */
-    override fun onMenuItemSelected(item: MenuItemImpl): Boolean {
-        when (item.itemId) {
+    override fun onMenuItemSelected(itemId: Int): Boolean {
+        when (itemId) {
             R.id.menu_replace -> {
                 ReplaceEditDialog.show(supportFragmentManager, pattern = selectedText)
                 return true

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

@@ -27,7 +27,7 @@ import kotlinx.android.synthetic.main.popup_action_menu.view.*
 import org.jetbrains.anko.sdk27.listeners.onClick
 import org.jetbrains.anko.toast
 
-
+@SuppressLint("RestrictedApi")
 class TextActionMenu(private val context: Context, private val callBack: CallBack) :
     PopupWindow(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT) {
 
@@ -70,7 +70,7 @@ class TextActionMenu(private val context: Context, private val callBack: CallBac
         override fun registerListener(holder: ItemViewHolder) {
             holder.itemView.onClick {
                 getItem(holder.layoutPosition)?.let {
-                    if (!callBack.onMenuItemSelected(it)) {
+                    if (!callBack.onMenuItemSelected(it.itemId)) {
                         onMenuItemSelected(it)
                     }
                 }
@@ -150,7 +150,7 @@ class TextActionMenu(private val context: Context, private val callBack: CallBac
     interface CallBack {
         val selectedText: String
 
-        fun onMenuItemSelected(item: MenuItemImpl): Boolean
+        fun onMenuItemSelected(itemId: Int): Boolean
 
         fun onMenuActionFinally()
     }

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

@@ -10,6 +10,7 @@ import io.legado.app.R
 import io.legado.app.constant.EventBus
 import io.legado.app.help.ReadBookConfig
 import io.legado.app.ui.book.read.Help
+import io.legado.app.utils.dp
 import io.legado.app.utils.postEvent
 import io.legado.app.utils.visible
 import kotlinx.android.synthetic.main.dialog_read_padding.*
@@ -51,13 +52,20 @@ class PaddingConfigDialog : DialogFragment() {
     }
 
     private fun initData() = with(ReadBookConfig) {
+        if (hideStatusBar) {
+            tv_header_padding.visible()
+            dsb_header_padding_top.visible()
+            dsb_header_padding_bottom.visible()
+            dsb_header_padding_left.visible()
+            dsb_header_padding_right.visible()
+            tv_body_padding.setPadding(0, 10.dp, 0, 10.dp)
+        }
         //正文
         dsb_padding_top.progress = paddingTop
         dsb_padding_bottom.progress = paddingBottom
         dsb_padding_left.progress = paddingLeft
         dsb_padding_right.progress = paddingRight
         //页眉
-        tv_header_padding.visible(hideStatusBar)
         dsb_header_padding_top.progress = headerPaddingTop
         dsb_header_padding_bottom.progress = headerPaddingBottom
         dsb_header_padding_left.progress = headerPaddingLeft

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

@@ -23,10 +23,12 @@ import io.legado.app.utils.removePref
 object ChapterProvider {
     var viewWidth = 0
     var viewHeight = 0
-    var visibleWidth = 0
-    var visibleHeight = 0
     var paddingLeft = 0
     var paddingTop = 0
+    var visibleWidth = 0
+    var visibleHeight = 0
+    var visibleRight = 0
+    var visibleBottom = 0
     private var lineSpacingExtra = 0f
     private var paragraphSpacing = 0
     var typeface: Typeface = Typeface.SANS_SERIF
@@ -342,6 +344,8 @@ object ChapterProvider {
         paddingTop = ReadBookConfig.paddingTop.dp
         visibleWidth = viewWidth - paddingLeft - ReadBookConfig.paddingRight.dp
         visibleHeight = viewHeight - paddingTop - ReadBookConfig.paddingBottom.dp
+        visibleRight = paddingLeft + visibleWidth
+        visibleBottom = paddingTop + visibleHeight
     }
 
 }

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

@@ -3,6 +3,7 @@ package io.legado.app.ui.book.read.page
 import android.content.Context
 import android.graphics.Canvas
 import android.graphics.Paint
+import android.graphics.RectF
 import android.util.AttributeSet
 import android.view.View
 import io.legado.app.R
@@ -26,16 +27,14 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
         }
     }
     private var callBack: CallBack
-    private var selectLineStart = 0
-    private var selectCharStart = 0
-    private var selectLineEnd = 0
-    private var selectCharEnd = 0
+    private val visibleRect = RectF()
+    private val selectStart = arrayOf(0, 0, 0)
+    private val selectEnd = arrayOf(0, 0, 0)
     private var textPage: TextPage = TextPage()
     //滚动参数
     private val pageFactory: TextPageFactory get() = callBack.pageFactory
     private val maxScrollOffset = 100f
     private var pageOffset = 0f
-    private var linePos = 0
 
     init {
         callBack = activity as CallBack
@@ -53,38 +52,30 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
         ChapterProvider.viewWidth = w
         ChapterProvider.viewHeight = h
         ChapterProvider.upSize()
+        visibleRect.set(
+            ChapterProvider.paddingLeft.toFloat(),
+            ChapterProvider.paddingTop.toFloat(),
+            ChapterProvider.visibleRight.toFloat(),
+            ChapterProvider.visibleBottom.toFloat()
+        )
         textPage.format()
     }
 
     override fun onDraw(canvas: Canvas) {
         super.onDraw(canvas)
-        if (ReadBookConfig.isScroll) {
-            drawScrollPage(canvas)
-        } else {
-            drawHorizontalPage(canvas)
-        }
-    }
-
-    private fun drawHorizontalPage(canvas: Canvas) {
-        textPage.textLines.forEach { textLine ->
-            drawChars(
-                canvas,
-                textLine.textChars,
-                textLine.lineTop,
-                textLine.lineBase,
-                textLine.lineBottom,
-                textLine.isTitle,
-                textLine.isReadAloud
-            )
-        }
+        canvas.clipRect(visibleRect)
+        drawPage(canvas)
     }
 
-    private fun drawScrollPage(canvas: Canvas) {
-        val mPageOffset = pageOffset
+    /**
+     * 绘制页面
+     */
+    private fun drawPage(canvas: Canvas) {
+        var relativeOffset = relativeOffset(0)
         textPage.textLines.forEach { textLine ->
-            val lineTop = textLine.lineTop + mPageOffset
-            val lineBase = textLine.lineBase + mPageOffset
-            val lineBottom = textLine.lineBottom + mPageOffset
+            val lineTop = textLine.lineTop + relativeOffset
+            val lineBase = textLine.lineBase + relativeOffset
+            val lineBottom = textLine.lineBottom + relativeOffset
             drawChars(
                 canvas,
                 textLine.textChars,
@@ -95,11 +86,14 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
                 textLine.isReadAloud
             )
         }
-        pageFactory.nextPage?.textLines?.forEach { textLine ->
-            val yPy = mPageOffset + textPage.height - ChapterProvider.paddingTop
-            val lineTop = textLine.lineTop + yPy
-            val lineBase = textLine.lineBase + yPy
-            val lineBottom = textLine.lineBottom + yPy
+        if (!ReadBookConfig.isScroll) return
+        //滚动翻页
+        val nextPage = relativePage(1)
+        relativeOffset = relativeOffset(1)
+        nextPage.textLines.forEach { textLine ->
+            val lineTop = textLine.lineTop + relativeOffset
+            val lineBase = textLine.lineBase + relativeOffset
+            val lineBottom = textLine.lineBottom + relativeOffset
             drawChars(
                 canvas,
                 textLine.textChars,
@@ -110,23 +104,28 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
                 textLine.isReadAloud
             )
         }
-        pageFactory.prevPage?.textLines?.forEach { textLine ->
-            val yPy = mPageOffset + ChapterProvider.paddingTop
-            val lineTop = -textLine.lineTop + yPy
-            val lineBase = -textLine.lineBase + yPy
-            val lineBottom = -textLine.lineBottom + yPy
-            drawChars(
-                canvas,
-                textLine.textChars,
-                lineTop,
-                lineBase,
-                lineBottom,
-                textLine.isTitle,
-                textLine.isReadAloud
-            )
+        relativeOffset = relativeOffset(2)
+        if (relativeOffset < ChapterProvider.visibleHeight) {
+            relativePage(2).textLines.forEach { textLine ->
+                val lineTop = textLine.lineTop + relativeOffset
+                val lineBase = textLine.lineBase + relativeOffset
+                val lineBottom = textLine.lineBottom + relativeOffset
+                drawChars(
+                    canvas,
+                    textLine.textChars,
+                    lineTop,
+                    lineBase,
+                    lineBottom,
+                    textLine.isTitle,
+                    textLine.isReadAloud
+                )
+            }
         }
     }
 
+    /**
+     * 绘制文字
+     */
     private fun drawChars(
         canvas: Canvas,
         textChars: List<TextChar>,
@@ -147,6 +146,9 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
         }
     }
 
+    /**
+     * 滚动事件
+     */
     fun onScroll(mOffset: Float) {
         if (mOffset == 0f) return
         var offset = mOffset
@@ -159,13 +161,13 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
         pageOffset += offset
         if (pageOffset > 0) {
             pageFactory.moveToPrev()
-            textPage = pageFactory.currentPage ?: TextPage().format()
+            textPage = pageFactory.currentPage
             pageOffset -= textPage.height
             upView?.invoke(textPage)
         } else if (pageOffset < -textPage.height) {
             pageOffset += textPage.height
             pageFactory.moveToNext()
-            textPage = pageFactory.currentPage ?: TextPage().format()
+            textPage = pageFactory.currentPage
             upView?.invoke(textPage)
         }
         invalidate()
@@ -173,99 +175,290 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
 
     fun resetPageOffset() {
         pageOffset = 0f
-        linePos = 0
     }
 
-    fun selectText(x: Float, y: Float, select: (lineIndex: Int, charIndex: Int) -> Unit) {
+    /**
+     * 选择初始文字
+     */
+    fun selectText(
+        x: Float,
+        y: Float,
+        select: (relativePage: Int, lineIndex: Int, charIndex: Int) -> Unit
+    ) {
+        if (!visibleRect.contains(x, y)) return
+        var relativeOffset = relativeOffset(0)
         for ((lineIndex, textLine) in textPage.textLines.withIndex()) {
-            if (y > textLine.lineTop && y < textLine.lineBottom) {
+            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] = 0
+                        selectStart[1] = lineIndex
+                        selectStart[2] = charIndex
+                        selectEnd[0] = 0
+                        selectEnd[1] = lineIndex
+                        selectEnd[2] = charIndex
+                        upSelectedStart(textChar.start, textLine.lineBottom + 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)
+                        upSelectedEnd(textChar.end, textLine.lineBottom + relativeOffset)
+                        select(1, lineIndex, charIndex)
+                        return
+                    }
+                }
+                return
+            }
+        }
+        relativeOffset = relativeOffset(2)
+        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()
-                        selectLineStart = lineIndex
-                        selectCharStart = charIndex
-                        selectLineEnd = lineIndex
-                        selectCharEnd = charIndex
-                        upSelectedStart(textChar.start, textLine.lineBottom)
-                        upSelectedEnd(textChar.end, textLine.lineBottom)
-                        select(lineIndex, charIndex)
+                        selectStart[0] = 2
+                        selectStart[1] = lineIndex
+                        selectStart[2] = charIndex
+                        selectEnd[0] = 2
+                        selectEnd[1] = lineIndex
+                        selectEnd[2] = charIndex
+                        upSelectedStart(textChar.start, textLine.lineBottom + relativeOffset)
+                        upSelectedEnd(textChar.end, textLine.lineBottom + relativeOffset)
+                        select(2, lineIndex, charIndex)
+                        return
                     }
                 }
-                break
+                return
             }
         }
     }
 
+    /**
+     * 开始选择符移动
+     */
     fun selectStartMove(x: Float, y: Float) {
+        if (!visibleRect.contains(x, y)) return
+        var relativeOffset = relativeOffset(0)
         for ((lineIndex, textLine) in textPage.textLines.withIndex()) {
-            if (y > textLine.lineTop && y < textLine.lineBottom) {
+            if (y > textLine.lineTop + relativeOffset && y < textLine.lineBottom + relativeOffset) {
                 for ((charIndex, textChar) in textLine.textChars.withIndex()) {
                     if (x > textChar.start && x < textChar.end) {
-                        if (selectLineStart != lineIndex || selectCharStart != charIndex) {
-                            selectLineStart = lineIndex
-                            selectCharStart = charIndex
-                            upSelectedStart(textChar.start, textLine.lineBottom)
-                            upSelectChars(textPage)
+                        if (selectStart[0] != 0 || selectStart[1] != lineIndex || selectStart[2] != charIndex) {
+                            if (selectToInt(0, lineIndex, charIndex) > selectToInt(selectEnd)) {
+                                return
+                            }
+                            selectStart[0] = 0
+                            selectStart[1] = lineIndex
+                            selectStart[2] = charIndex
+                            upSelectedStart(textChar.start, textLine.lineBottom + relativeOffset)
+                            upSelectChars()
                         }
-                        break
+                        return
                     }
                 }
-                break
+                return
+            }
+        }
+        if (!ReadBookConfig.isScroll) return
+        //滚动翻页
+        relativeOffset = relativeOffset(1)
+        if (relativeOffset >= ChapterProvider.visibleHeight) return
+        for ((lineIndex, textLine) in relativePage(1).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) {
+                        if (selectStart[0] != 1 || selectStart[1] != lineIndex || selectStart[2] != charIndex) {
+                            if (selectToInt(1, lineIndex, charIndex) > selectToInt(selectEnd)) {
+                                return
+                            }
+                            selectStart[0] = 1
+                            selectStart[1] = lineIndex
+                            selectStart[2] = charIndex
+                            upSelectedStart(textChar.start, textLine.lineBottom + relativeOffset)
+                            upSelectChars()
+                        }
+                        return
+                    }
+                }
+                return
+            }
+        }
+        relativeOffset = relativeOffset(2)
+        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) {
+                        if (selectStart[0] != 2 || selectStart[1] != lineIndex || selectStart[2] != charIndex) {
+                            if (selectToInt(2, lineIndex, charIndex) > selectToInt(selectEnd)) {
+                                return
+                            }
+                            selectStart[0] = 2
+                            selectStart[1] = lineIndex
+                            selectStart[2] = charIndex
+                            upSelectedStart(textChar.start, textLine.lineBottom + relativeOffset)
+                            upSelectChars()
+                        }
+                        return
+                    }
+                }
+                return
             }
         }
     }
 
-    fun selectStartMoveIndex(lineIndex: Int, charIndex: Int) {
-        selectLineStart = lineIndex
-        selectCharStart = charIndex
-        val textLine = textPage.textLines[lineIndex]
-        val textChar = textLine.textChars[charIndex]
-        upSelectedStart(textChar.start, textLine.lineBottom)
-        upSelectChars(textPage)
-    }
-
+    /**
+     * 结束选择符移动
+     */
     fun selectEndMove(x: Float, y: Float) {
+        if (!visibleRect.contains(x, y)) return
+        var relativeOffset = relativeOffset(0)
         for ((lineIndex, textLine) in textPage.textLines.withIndex()) {
-            if (y > textLine.lineTop && y < textLine.lineBottom) {
+            if (y > textLine.lineTop + relativeOffset && y < textLine.lineBottom + relativeOffset) {
+                for ((charIndex, textChar) in textLine.textChars.withIndex()) {
+                    if (x > textChar.start && x < textChar.end) {
+                        if (selectEnd[0] != 0 || selectEnd[1] != lineIndex || selectEnd[2] != charIndex) {
+                            if (selectToInt(0, lineIndex, charIndex) < selectToInt(selectStart)) {
+                                return
+                            }
+                            selectEnd[0] = 0
+                            selectEnd[1] = lineIndex
+                            selectEnd[2] = charIndex
+                            upSelectedEnd(textChar.end, textLine.lineBottom + relativeOffset)
+                            upSelectChars()
+                        }
+                        return
+                    }
+                }
+                return
+            }
+        }
+        if (!ReadBookConfig.isScroll) return
+        //滚动翻页
+        relativeOffset = relativeOffset(1)
+        if (relativeOffset >= ChapterProvider.visibleHeight) return
+        for ((lineIndex, textLine) in relativePage(1).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) {
+                        if (selectEnd[0] != 1 || selectEnd[1] != lineIndex || selectEnd[2] != charIndex) {
+                            if (selectToInt(1, lineIndex, charIndex) < selectToInt(selectStart)) {
+                                return
+                            }
+                            selectEnd[0] = 1
+                            selectEnd[1] = lineIndex
+                            selectEnd[2] = charIndex
+                            upSelectedEnd(textChar.end, textLine.lineBottom + relativeOffset)
+                            upSelectChars()
+                        }
+                        return
+                    }
+                }
+                return
+            }
+        }
+        relativeOffset = relativeOffset(2)
+        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) {
-                        if (selectLineEnd != lineIndex || selectCharEnd != charIndex) {
-                            selectLineEnd = lineIndex
-                            selectCharEnd = charIndex
-                            upSelectedEnd(textChar.end, textLine.lineBottom)
-                            upSelectChars(textPage)
+                        if (selectEnd[0] != 2 || selectEnd[1] != lineIndex || selectEnd[2] != charIndex) {
+                            if (selectToInt(2, lineIndex, charIndex) < selectToInt(selectStart)) {
+                                return
+                            }
+                            selectEnd[0] = 2
+                            selectEnd[1] = lineIndex
+                            selectEnd[2] = charIndex
+                            upSelectedEnd(textChar.end, textLine.lineBottom + relativeOffset)
+                            upSelectChars()
                         }
-                        break
+                        return
                     }
                 }
-                break
+                return
             }
         }
     }
 
-    fun selectEndMoveIndex(lineIndex: Int, charIndex: Int) {
-        selectLineEnd = lineIndex
-        selectCharEnd = charIndex
-        val textLine = textPage.textLines[lineIndex]
+    /**
+     * 选择开始文字
+     */
+    fun selectStartMoveIndex(relativePage: Int, lineIndex: Int, charIndex: Int) {
+        selectStart[0] = relativePage
+        selectStart[1] = lineIndex
+        selectStart[2] = charIndex
+        val textLine = relativePage(relativePage).textLines[lineIndex]
         val textChar = textLine.textChars[charIndex]
-        upSelectedEnd(textChar.end, textLine.lineBottom)
-        upSelectChars(textPage)
+        upSelectedStart(textChar.start, textLine.lineBottom + relativeOffset(relativePage))
+        upSelectChars()
     }
 
-    private fun upSelectChars(textPage: TextPage) {
-        for ((lineIndex, textLine) in textPage.textLines.withIndex()) {
-            for ((charIndex, textChar) in textLine.textChars.withIndex()) {
-                textChar.selected =
-                    if (lineIndex == selectLineStart && lineIndex == selectLineEnd) {
-                        charIndex in selectCharStart..selectCharEnd
-                    } else if (lineIndex == selectLineStart) {
-                        charIndex >= selectCharStart
-                    } else if (lineIndex == selectLineEnd) {
-                        charIndex <= selectCharEnd
-                    } else {
-                        lineIndex in (selectLineStart + 1) until selectLineEnd
-                    }
+    /**
+     * 选择结束文字
+     */
+    fun selectEndMoveIndex(relativePage: Int, lineIndex: Int, charIndex: Int) {
+        selectEnd[0] = relativePage
+        selectEnd[1] = lineIndex
+        selectEnd[2] = charIndex
+        val textLine = relativePage(relativePage).textLines[lineIndex]
+        val textChar = textLine.textChars[charIndex]
+        upSelectedEnd(textChar.end, textLine.lineBottom + relativeOffset(relativePage))
+        upSelectChars()
+    }
+
+    private fun upSelectChars() {
+        val last = if (ReadBookConfig.isScroll) 2 else 0
+        for (relativePos in 0..last) {
+            for ((lineIndex, textLine) in relativePage(relativePos).textLines.withIndex()) {
+                for ((charIndex, textChar) in textLine.textChars.withIndex()) {
+                    textChar.selected =
+                        if (relativePos == selectStart[0]
+                            && relativePos == selectEnd[0]
+                            && lineIndex == selectStart[1]
+                            && lineIndex == selectEnd[1]
+                        ) {
+                            charIndex in selectStart[2]..selectEnd[2]
+                        } else if (relativePos == selectStart[0] && lineIndex == selectStart[1]) {
+                            charIndex >= selectStart[2]
+                        } else if (relativePos == selectEnd[0] && lineIndex == selectEnd[1]) {
+                            charIndex <= selectEnd[2]
+                        } else if (relativePos == selectStart[0] && relativePos == selectEnd[0]) {
+                            lineIndex in (selectStart[1] + 1) until selectEnd[1]
+                        } else if (relativePos == selectStart[0]) {
+                            lineIndex > selectStart[1]
+                        } else if (relativePos == selectEnd[0]) {
+                            lineIndex < selectEnd[1]
+                        } else {
+                            relativePos in selectStart[0] + 1 until selectEnd[0]
+                        }
+                }
             }
         }
         invalidate()
@@ -280,9 +473,12 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
     }
 
     fun cancelSelect() {
-        textPage.textLines.forEach { textLine ->
-            textLine.textChars.forEach {
-                it.selected = false
+        val last = if (ReadBookConfig.isScroll) 2 else 0
+        for (relativePos in 0..last) {
+            relativePage(relativePos).textLines.forEach { textLine ->
+                textLine.textChars.forEach {
+                    it.selected = false
+                }
             }
         }
         invalidate()
@@ -292,31 +488,86 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
     val selectedText: String
         get() {
             val stringBuilder = StringBuilder()
-            for (lineIndex in selectLineStart..selectLineEnd) {
-                if (lineIndex == selectLineStart && lineIndex == selectLineEnd) {
-                    stringBuilder.append(
-                        textPage.textLines[lineIndex].text.substring(
-                            selectCharStart,
-                            selectCharEnd + 1
-                        )
-                    )
-                } else if (lineIndex == selectLineStart) {
-                    stringBuilder.append(
-                        textPage.textLines[lineIndex].text.substring(
-                            selectCharStart
-                        )
-                    )
-                } else if (lineIndex == selectLineEnd) {
-                    stringBuilder.append(
-                        textPage.textLines[lineIndex].text.substring(0, selectCharEnd + 1)
-                    )
-                } else {
-                    stringBuilder.append(textPage.textLines[lineIndex].text)
+            for (relativePos in selectStart[0]..selectEnd[0]) {
+                val textPage = relativePage(relativePos)
+                if (relativePos == selectStart[0] && relativePos == selectEnd[0]) {
+                    for (lineIndex in selectStart[1]..selectEnd[1]) {
+                        if (lineIndex == selectStart[1] && lineIndex == selectEnd[1]) {
+                            stringBuilder.append(
+                                textPage.textLines[lineIndex].text.substring(
+                                    selectStart[2],
+                                    selectEnd[2] + 1
+                                )
+                            )
+                        } else if (lineIndex == selectStart[1]) {
+                            stringBuilder.append(
+                                textPage.textLines[lineIndex].text.substring(
+                                    selectStart[2]
+                                )
+                            )
+                        } else if (lineIndex == selectEnd[1]) {
+                            stringBuilder.append(
+                                textPage.textLines[lineIndex].text.substring(0, selectEnd[2] + 1)
+                            )
+                        } else {
+                            stringBuilder.append(textPage.textLines[lineIndex].text)
+                        }
+                    }
+                } else if (relativePos == selectStart[0]) {
+                    for (lineIndex in selectStart[1] until relativePage(relativePos).textLines.size) {
+                        if (lineIndex == selectStart[1]) {
+                            stringBuilder.append(
+                                textPage.textLines[lineIndex].text.substring(
+                                    selectStart[2]
+                                )
+                            )
+                        } else {
+                            stringBuilder.append(textPage.textLines[lineIndex].text)
+                        }
+                    }
+                } else if (relativePos == selectEnd[0]) {
+                    for (lineIndex in 0..selectEnd[1]) {
+                        if (lineIndex == selectEnd[1]) {
+                            stringBuilder.append(
+                                textPage.textLines[lineIndex].text.substring(0, selectEnd[2] + 1)
+                            )
+                        } else {
+                            stringBuilder.append(textPage.textLines[lineIndex].text)
+                        }
+                    }
+                } else if (relativePos in selectStart[0] + 1 until selectEnd[0]) {
+                    for (lineIndex in selectStart[1]..selectEnd[1]) {
+                        stringBuilder.append(textPage.textLines[lineIndex].text)
+                    }
                 }
             }
             return stringBuilder.toString()
         }
 
+    private fun selectToInt(page: Int, line: Int, char: Int): Int {
+        return page * 1000000 + line * 100000 + char
+    }
+
+    private fun selectToInt(select: Array<Int>): Int {
+        return select[0] * 1000000 + select[1] * 100000 + select[2]
+    }
+
+    private fun relativeOffset(relativePos: Int): Float {
+        return when (relativePos) {
+            0 -> pageOffset
+            1 -> pageOffset + textPage.height
+            else -> pageOffset + textPage.height + pageFactory.nextPage.height
+        }
+    }
+
+    private fun relativePage(relativePos: Int): TextPage {
+        return when (relativePos) {
+            0 -> textPage
+            1 -> pageFactory.nextPage
+            else -> pageFactory.nextPagePlus
+        }
+    }
+
     interface CallBack {
         fun upSelectedStart(x: Float, y: Float)
         fun upSelectedEnd(x: Float, y: Float)

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

@@ -15,7 +15,6 @@ import java.util.*
 
 
 class ContentView(context: Context) : FrameLayout(context) {
-    private var pageSize: Int = 0
 
     init {
         //设置背景防止切换背景时文字重叠
@@ -26,8 +25,7 @@ class ContentView(context: Context) : FrameLayout(context) {
         upTime()
         content_text_view.upView = {
             tv_bottom_left.text = it.title
-            pageSize = it.pageSize
-            setPageIndex(it.index)
+            setPageIndex(it.index, it.pageSize)
         }
     }
 
@@ -95,18 +93,19 @@ class ContentView(context: Context) : FrameLayout(context) {
         tv_top_right.text = context.getString(R.string.battery_show, battery)
     }
 
-    fun setContent(textPage: TextPage?) {
-        if (textPage != null) {
-            tv_bottom_left.text = textPage.title
-            pageSize = textPage.pageSize
-            setPageIndex(textPage.index)
-            content_text_view.resetPageOffset()
-            content_text_view.setContent(textPage)
-        }
+    fun setContent(textPage: TextPage) {
+        tv_bottom_left.text = textPage.title
+        setPageIndex(textPage.index, textPage.pageSize)
+        content_text_view.resetPageOffset()
+        content_text_view.setContent(textPage)
+    }
+
+    fun resetPageOffset() {
+        content_text_view.resetPageOffset()
     }
 
     @SuppressLint("SetTextI18n")
-    fun setPageIndex(pageIndex: Int?) {
+    fun setPageIndex(pageIndex: Int?, pageSize: Int) {
         pageIndex?.let {
             tv_bottom_right.text = "${pageIndex.plus(1)}/${pageSize}"
         }
@@ -120,7 +119,10 @@ class ContentView(context: Context) : FrameLayout(context) {
         content_text_view.selectAble = selectAble
     }
 
-    fun selectText(e: MotionEvent, select: (lineIndex: Int, charIndex: Int) -> Unit) {
+    fun selectText(
+        e: MotionEvent,
+        select: (relativePage: Int, lineIndex: Int, charIndex: Int) -> Unit
+    ) {
         val y = e.y - headerHeight
         return content_text_view.selectText(e.x, y, select)
     }
@@ -129,16 +131,16 @@ class ContentView(context: Context) : FrameLayout(context) {
         content_text_view.selectStartMove(x, y - headerHeight)
     }
 
-    fun selectStartMoveIndex(lineIndex: Int, charIndex: Int) {
-        content_text_view.selectStartMoveIndex(lineIndex, charIndex)
+    fun selectStartMoveIndex(relativePage: Int, lineIndex: Int, charIndex: Int) {
+        content_text_view.selectStartMoveIndex(relativePage, lineIndex, charIndex)
     }
 
     fun selectEndMove(x: Float, y: Float) {
         content_text_view.selectEndMove(x, y - headerHeight)
     }
 
-    fun selectEndMoveIndex(lineIndex: Int, charIndex: Int) {
-        content_text_view.selectEndMoveIndex(lineIndex, charIndex)
+    fun selectEndMoveIndex(relativePage: Int, lineIndex: Int, charIndex: Int) {
+        content_text_view.selectEndMoveIndex(relativePage, lineIndex, charIndex)
     }
 
     fun cancelSelect() {

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

@@ -7,11 +7,11 @@ interface DataSource {
 
     val pageIndex: Int get() = ReadBook.durChapterPos()
 
-    fun getCurrentChapter(): TextChapter?
+    val currentChapter: TextChapter?
 
-    fun getNextChapter(): TextChapter?
+    val nextChapter: TextChapter?
 
-    fun getPreviousChapter(): TextChapter?
+    val prevChapter: TextChapter?
 
     fun hasNextChapter(): Boolean
 

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

@@ -10,11 +10,13 @@ abstract class PageFactory<DATA>(protected val dataSource: DataSource) {
 
     abstract fun moveToPrev(): Boolean
 
-    abstract val nextPage: DATA?
+    abstract val nextPage: DATA
 
-    abstract val prevPage: DATA?
+    abstract val prevPage: DATA
 
-    abstract val currentPage: DATA?
+    abstract val currentPage: DATA
+
+    abstract val nextPagePlus: DATA
 
     abstract fun hasNext(): Boolean
 

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

@@ -164,15 +164,18 @@ class PageView(context: Context, attrs: AttributeSet) :
         nextPage.upBattery(battery)
     }
 
-    override fun getCurrentChapter(): TextChapter? {
+    override val currentChapter: TextChapter?
+        get() {
         return if (callBack.isInitFinish) ReadBook.textChapter(0) else null
     }
 
-    override fun getNextChapter(): TextChapter? {
+    override val nextChapter: TextChapter?
+        get() {
         return if (callBack.isInitFinish) ReadBook.textChapter(1) else null
     }
 
-    override fun getPreviousChapter(): TextChapter? {
+    override val prevChapter: TextChapter?
+        get() {
         return if (callBack.isInitFinish) ReadBook.textChapter(-1) else null
     }
 

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

@@ -10,7 +10,7 @@ class TextPageFactory(dataSource: DataSource) : PageFactory<TextPage>(dataSource
     }
 
     override fun hasNext(): Boolean = with(dataSource) {
-        return hasNextChapter() || getCurrentChapter()?.isLastIndex(pageIndex) != true
+        return hasNextChapter() || currentChapter?.isLastIndex(pageIndex) != true
     }
 
     override fun moveToFirst() {
@@ -18,7 +18,7 @@ class TextPageFactory(dataSource: DataSource) : PageFactory<TextPage>(dataSource
     }
 
     override fun moveToLast() = with(dataSource) {
-        getCurrentChapter()?.let {
+        currentChapter?.let {
             if (it.pageSize() == 0) {
                 ReadBook.setPageIndex(0)
             } else {
@@ -29,7 +29,7 @@ class TextPageFactory(dataSource: DataSource) : PageFactory<TextPage>(dataSource
 
     override fun moveToNext(): Boolean = with(dataSource) {
         return if (hasNext()) {
-            if (getCurrentChapter()?.isLastIndex(pageIndex) == true) {
+            if (currentChapter?.isLastIndex(pageIndex) == true) {
                 ReadBook.moveToNextChapter(false)
             } else {
                 ReadBook.setPageIndex(pageIndex.plus(1))
@@ -51,28 +51,62 @@ class TextPageFactory(dataSource: DataSource) : PageFactory<TextPage>(dataSource
             false
     }
 
-    override val currentPage: TextPage?
+    override val currentPage: TextPage
         get() = with(dataSource) {
-            return getCurrentChapter()?.page(pageIndex)
+            currentChapter?.let {
+                return@with it.page(pageIndex)
+                    ?: TextPage(title = it.title).format()
+            }
+            return TextPage().format()
         }
 
-    override val nextPage: TextPage?
+    override val nextPage: TextPage
         get() = with(dataSource) {
-            getCurrentChapter()?.let {
+            currentChapter?.let {
                 if (pageIndex < it.pageSize() - 1) {
-                    return getCurrentChapter()?.page(pageIndex + 1)?.removePageAloudSpan()
+                    return@with it.page(pageIndex + 1)?.removePageAloudSpan()
+                        ?: TextPage(title = it.title).format()
                 }
             }
-            return getNextChapter()?.page(0)?.removePageAloudSpan()
+            nextChapter?.let {
+                return@with it.page(0)?.removePageAloudSpan()
+                    ?: TextPage(title = it.title).format()
+            }
+            return TextPage().format()
         }
 
-    override val prevPage: TextPage?
+    override val prevPage: TextPage
         get() = with(dataSource) {
             if (pageIndex > 0) {
-                return getCurrentChapter()?.page(pageIndex - 1)?.removePageAloudSpan()
+                currentChapter?.let {
+                    return@with it.page(pageIndex - 1)?.removePageAloudSpan()
+                        ?: TextPage(title = it.title).format()
+                }
             }
-            return getPreviousChapter()?.lastPage()?.removePageAloudSpan()
+            prevChapter?.let {
+                return@with it.lastPage()?.removePageAloudSpan()
+                    ?: TextPage(title = it.title).format()
+            }
+            return TextPage().format()
         }
 
+    override val nextPagePlus: TextPage
+        get() = with(dataSource) {
+            currentChapter?.let {
+                if (pageIndex < it.pageSize() - 2) {
+                    return@with it.page(pageIndex + 2)?.removePageAloudSpan()
+                        ?: TextPage(title = it.title).format()
+                }
+                nextChapter?.let { nc ->
+                    if (pageIndex < it.pageSize() - 1) {
+                        return@with nc.page(0)?.removePageAloudSpan()
+                            ?: TextPage(title = nc.title).format()
+                    }
+                    return@with nc.page(1)?.removePageAloudSpan()
+                        ?: TextPage(title = nc.title).format()
+                }
 
+            }
+            return TextPage().format()
+        }
 }

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

@@ -22,7 +22,8 @@ abstract class HorizontalPageDelegate(pageView: PageView) : PageDelegate(pageVie
     private fun onScroll(event: MotionEvent) {
         //判断是否移动了
         if (!isMoved) {
-            isMoved = abs(startX - event.x) > slop || abs(startY - event.y) > slop
+            isMoved = abs(startX - event.x) > slop
+                    || abs(startX - event.x) > abs(startY - event.y)
             if (isMoved) {
                 if (event.x - startX > 0) {
                     //如果上一页不存在

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

@@ -67,9 +67,14 @@ abstract class PageDelegate(protected val pageView: PageView) :
     var isTextSelected = false
     var selectedOnDown = false
 
+    var firstRelativePage = 0
     var firstLineIndex: Int = 0
     var firstCharIndex: Int = 0
 
+    init {
+        curPage.resetPageOffset()
+    }
+
     open fun setStartPoint(x: Float, y: Float, invalidate: Boolean = true) {
         startX = x
         startY = y
@@ -131,7 +136,7 @@ abstract class PageDelegate(protected val pageView: PageView) :
         bitmap = null
     }
 
-    fun setViewSize(width: Int, height: Int) {
+    open fun setViewSize(width: Int, height: Int) {
         viewWidth = width
         viewHeight = height
         pageView.invalidate()
@@ -282,23 +287,41 @@ abstract class PageDelegate(protected val pageView: PageView) :
      * 长按选择
      */
     override fun onLongPress(e: MotionEvent) {
-        curPage.selectText(e) { lineIndex, charIndex ->
+        curPage.selectText(e) { relativePage, lineIndex, charIndex ->
             isTextSelected = true
+            firstRelativePage = relativePage
             firstLineIndex = lineIndex
             firstCharIndex = charIndex
         }
     }
 
     protected fun selectText(event: MotionEvent) {
-        curPage.selectText(event) { lineIndex, charIndex ->
-            if (lineIndex > firstLineIndex
-                || (lineIndex == firstLineIndex && charIndex > firstCharIndex)
-            ) {
-                curPage.selectStartMoveIndex(firstLineIndex, firstCharIndex)
-                curPage.selectEndMoveIndex(lineIndex, charIndex)
-            } else {
-                curPage.selectEndMoveIndex(firstLineIndex, firstCharIndex)
-                curPage.selectStartMoveIndex(lineIndex, charIndex)
+        curPage.selectText(event) { relativePage, lineIndex, charIndex ->
+            when {
+                relativePage > firstRelativePage -> {
+                    curPage.selectStartMoveIndex(firstRelativePage, firstLineIndex, firstCharIndex)
+                    curPage.selectEndMoveIndex(relativePage, lineIndex, charIndex)
+                }
+                relativePage < firstRelativePage -> {
+                    curPage.selectEndMoveIndex(firstRelativePage, firstLineIndex, firstCharIndex)
+                    curPage.selectStartMoveIndex(relativePage, lineIndex, charIndex)
+                }
+                lineIndex > firstLineIndex -> {
+                    curPage.selectStartMoveIndex(firstRelativePage, firstLineIndex, firstCharIndex)
+                    curPage.selectEndMoveIndex(relativePage, lineIndex, charIndex)
+                }
+                lineIndex < firstLineIndex -> {
+                    curPage.selectEndMoveIndex(firstRelativePage, firstLineIndex, firstCharIndex)
+                    curPage.selectStartMoveIndex(relativePage, lineIndex, charIndex)
+                }
+                charIndex > firstCharIndex -> {
+                    curPage.selectStartMoveIndex(firstRelativePage, firstLineIndex, firstCharIndex)
+                    curPage.selectEndMoveIndex(relativePage, lineIndex, charIndex)
+                }
+                else -> {
+                    curPage.selectEndMoveIndex(firstRelativePage, firstLineIndex, firstCharIndex)
+                    curPage.selectStartMoveIndex(relativePage, lineIndex, charIndex)
+                }
             }
         }
     }

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

@@ -115,6 +115,11 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
         mFrontShadowDrawableHBT.gradientType = GradientDrawable.LINEAR_GRADIENT
     }
 
+    override fun setViewSize(width: Int, height: Int) {
+        super.setViewSize(width, height)
+        mMaxLength = hypot(viewWidth.toDouble(), viewWidth.toDouble()).toFloat()
+    }
+
     override fun setStartPoint(x: Float, y: Float, invalidate: Boolean) {
         super.setStartPoint(x, y, invalidate)
         calcCornerXY(x, y)
@@ -171,7 +176,6 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
     override fun onAnimStart() {
         var dx: Float
         val dy: Float
-        // dx 水平方向滑动的距离，负值会使滚动向左滚动
         // dy 垂直方向滑动的距离，负值会使滚动向上滚动
         if (isCancel) {
             dx = if (mCornerX > 0 && mDirection == Direction.NEXT) {
@@ -480,8 +484,10 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
     private fun calcPoints() {
         mTouchX = touchX
         mTouchY = touchY
+
         mMiddleX = (mTouchX + mCornerX) / 2
         mMiddleY = (mTouchY + mCornerY) / 2
+
         mBezierControl1.x =
             mMiddleX - (mCornerY - mMiddleY) * (mCornerY - mMiddleY) / (mCornerX - mMiddleX)
         mBezierControl1.y = mCornerY.toFloat()
@@ -492,6 +498,7 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
         } else {
             mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / (mCornerY - mMiddleY)
         }
+
         mBezierStart1.x = mBezierControl1.x - (mCornerX - mBezierControl1.x) / 2
         mBezierStart1.y = mCornerY.toFloat()
         //固定左边上下两个点
@@ -500,24 +507,27 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
                 if (mBezierStart1.x < 0)
                     mBezierStart1.x = viewWidth - mBezierStart1.x
 
-                val f1: Float = abs(mCornerX - mTouchX)
-                val f2: Float = viewWidth * f1 / mBezierStart1.x
+                val f1 = abs(mCornerX - mTouchX)
+                val f2 = viewWidth * f1 / mBezierStart1.x
                 mTouchX = abs(mCornerX - f2)
-                val f3: Float = abs(mCornerX - mTouchX) * abs(mCornerY - mTouchY) / f1
+                val f3 = abs(mCornerX - mTouchX) * abs(mCornerY - mTouchY) / f1
                 mTouchY = abs(mCornerY - f3)
 
                 mMiddleX = (mTouchX + mCornerX) / 2
                 mMiddleY = (mTouchY + mCornerY) / 2
+
                 mBezierControl1.x =
                     mMiddleX - (mCornerY - mMiddleY) * (mCornerY - mMiddleY) / (mCornerX - mMiddleX)
                 mBezierControl1.y = mCornerY.toFloat()
+
                 mBezierControl2.x = mCornerX.toFloat()
                 mBezierControl2.y = if ((mCornerY - mMiddleY).toInt() == 0) {
                     mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / 0.1f
                 } else {
                     mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / (mCornerY - mMiddleY)
                 }
-                mBezierStart1.x = (mBezierControl1.x - (mCornerX - mBezierControl1.x) / 2)
+
+                mBezierStart1.x = mBezierControl1.x - (mCornerX - mBezierControl1.x) / 2
             }
         }
         mBezierStart2.x = mCornerX.toFloat()

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

@@ -13,12 +13,14 @@
         android:layout_height="wrap_content"
         android:paddingBottom="10dp"
         android:textSize="18sp"
+        android:visibility="gone"
         android:text="@string/header" />
 
     <io.legado.app.ui.widget.DetailSeekBar
         android:id="@+id/dsb_header_padding_top"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:visibility="gone"
         app:title="@string/padding_top"
         app:max="100" />
 
@@ -26,6 +28,7 @@
         android:id="@+id/dsb_header_padding_bottom"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:visibility="gone"
         app:title="@string/padding_bottom"
         app:max="100" />
 
@@ -33,6 +36,7 @@
         android:id="@+id/dsb_header_padding_left"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:visibility="gone"
         app:title="@string/padding_left"
         app:max="100" />
 
@@ -40,13 +44,14 @@
         android:id="@+id/dsb_header_padding_right"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:visibility="gone"
         app:title="@string/padding_right"
         app:max="100" />
 
     <io.legado.app.ui.widget.text.AccentTextView
+        android:id="@+id/tv_body_padding"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:paddingTop="10dp"
         android:paddingBottom="10dp"
         android:textSize="18sp"
         android:text="@string/main_body" />

build.gradle

@@ -9,7 +9,7 @@ buildscript {
         maven { url 'https://plugins.gradle.org/m2/' }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.3'
+        classpath 'com.android.tools.build:gradle:3.6.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath 'de.timfreiheit.resourceplaceholders:placeholders:0.3'
         classpath 'com.google.gms:google-services:4.3.3'

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Wed Aug 21 20:30:49 CST 2019
+#Tue Feb 25 08:10:32 CST 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip