feat: 优化代码

app/src/main/java/io/legado/app/model/localBook/AnalyzeTxtFile.kt

@@ -60,8 +60,10 @@ class AnalyzeTxtFile {
         var allLength = 0
 
         //获取文件中的数据到buffer，直到没有数据为止
-        while (bookStream.read(buffer, 0, buffer.size).also { length = it } > 0) {
+        while (bookStream.read(buffer).also { length = it } > 0) {
             blockPos++
+            //如果存在Chapter
+            if (rulePattern != null) { //将数据转换成String
                 var blockContent = String(buffer, charset)
                 val lastN = blockContent.lastIndexOf("\n")
                 if (lastN > 0) {
@@ -70,8 +72,6 @@ class AnalyzeTxtFile {
                     allLength += length
                     bookStream.seek(allLength.toLong())
                 }
-            //如果存在Chapter
-            if (rulePattern != null) { //将数据转换成String
                 //当前Block下使过的String的指针
                 var seekPos = 0
                 //进行正则匹配
@@ -81,47 +81,62 @@ class AnalyzeTxtFile {
                     val chapterStart = matcher.start()
                     //获取章节内容
                     val chapterContent = blockContent.substring(seekPos, chapterStart)
-                    if (chapterContent.length > 30000 && pattern == null) {
+                    val chapterLength = chapterContent.toByteArray(charset).size
+                    if (chapterLength > 30000 && pattern == null) {
                         //移除不匹配的规则
                         tocRules.remove(tocRule)
                         return analyze(bookStream, book, null)
                     }
                     //如果 seekPos == 0 && nextChapterPos != 0 表示当前block处前面有一段内容
-                    //第一种情况一定是序章 第二种情况可能是上一个章节的内容
+                    //第一种情况一定是序章 第二种情况是上一个章节的内容
                     if (seekPos == 0 && chapterStart != 0) { //获取当前章节的内容
-                        val contentSize = chapterContent.toByteArray(charset).size.toLong()
-                        if (toc.isEmpty()) {
+                        if (toc.isEmpty()) { //如果当前没有章节，那么就是序章
+                            //加入简介
                             if (StringUtils.trim(chapterContent).isNotEmpty()) {
-                                val chapter = BookChapter()
-                                chapter.title = "前言"
-                                chapter.start = 0
-                                chapter.end = contentSize
-                                toc.add(chapter)
-                            }
-                        } else {
-                            toc.last().let {
-                                it.end = it.end!! + contentSize
-                            }
+                                val qyChapter = BookChapter()
+                                qyChapter.title = "前言"
+                                qyChapter.start = 0
+                                qyChapter.end = chapterLength.toLong()
+                                toc.add(qyChapter)
                             }
                             //创建当前章节
                             val curChapter = BookChapter()
                             curChapter.title = matcher.group()
-                        curChapter.start = (toc.lastOrNull()?.end ?: 0) + contentSize
+                            curChapter.start = chapterLength.toLong()
+                            toc.add(curChapter)
+                        } else { //否则就block分割之后，上一个章节的剩余内容
+                            //获取上一章节
+                            val lastChapter = toc.last()
+                            //将当前段落添加上一章去
+                            lastChapter.end =
+                                lastChapter.end!! + chapterLength.toLong()
+                            //创建当前章节
+                            val curChapter = BookChapter()
+                            curChapter.title = matcher.group()
+                            curChapter.start = lastChapter.end
                             toc.add(curChapter)
-                    } else {
-                        val lastChapter = toc.lastOrNull()
-                        lastChapter?.let {
-                            //上一章节结束等于这一章节开始
-                            it.end = it.start!! + chapterContent.toByteArray(charset).size
                         }
+                    } else {
+                        if (toc.isNotEmpty()) { //获取章节内容
+                            //获取上一章节
+                            val lastChapter = toc.last()
+                            lastChapter.end =
+                                lastChapter.start!! + chapterContent.toByteArray(charset).size.toLong()
                             //创建当前章节
                             val curChapter = BookChapter()
                             curChapter.title = matcher.group()
-                        curChapter.start = lastChapter?.end ?: 0
+                            curChapter.start = lastChapter.end
                             toc.add(curChapter)
+                        } else { //如果章节不存在则创建章节
+                            val curChapter = BookChapter()
+                            curChapter.title = matcher.group()
+                            curChapter.start = 0
+                            curChapter.end = 0
+                            toc.add(curChapter)
+                        }
                     }
                     //设置指针偏移
-                    seekPos += chapterContent.length
+                    seekPos += chapterLength
                 }
             } else { //进行本地虚拟分章
                 //章节在buffer的偏移量
@@ -165,7 +180,8 @@ class AnalyzeTxtFile {
             //block的偏移点
             curOffset += length.toLong()
 
-            if (rulePattern != null) { //设置上一章的结尾
+            if (rulePattern != null) {
+                //设置上一章的结尾
                 val lastChapter = toc.last()
                 lastChapter.end = curOffset
             }
@@ -231,10 +247,9 @@ class AnalyzeTxtFile {
             val bookFile = getBookFile(App.INSTANCE, book)
             //获取文件流
             val bookStream = RandomAccessFile(bookFile, "r")
-            bookStream.seek(bookChapter.start ?: 0)
-            val extent = (bookChapter.end!! - bookChapter.start!!).toInt()
-            val content = ByteArray(extent)
-            bookStream.read(content, 0, extent)
+            val content = ByteArray((bookChapter.end!! - bookChapter.start!!).toInt())
+            bookStream.seek(bookChapter.start!!)
+            bookStream.read(content)
             return String(content, book.fileCharset())
         }
 

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

@@ -225,6 +225,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
             R.id.menu_copy_text ->
                 TextDialog.show(supportFragmentManager, ReadBook.curTextChapter?.getContent())
             R.id.menu_update_toc -> ReadBook.book?.let {
+                ReadBook.upMsg(getString(R.string.toc_updateing))
                 viewModel.loadChapterList(it)
             }
             R.id.menu_enable_replace -> ReadBook.book?.let {

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

@@ -107,6 +107,7 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
                     App.db.bookChapterDao().insert(*it.toTypedArray())
                     App.db.bookDao().update(book)
                     ReadBook.chapterSize = it.size
+                    ReadBook.upMsg(null)
                     ReadBook.loadContent(resetPageOffset = true)
                 }
             } else {

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

@@ -44,12 +44,11 @@ data class TextPage(
             if (y < 0) y = 0f
             for (lineIndex in 0 until layout.lineCount) {
                 val textLine = TextLine()
-                textLine.lineTop = (ChapterProvider.paddingTop + y -
-                        (layout.getLineBottom(lineIndex) - layout.getLineTop(lineIndex)))
-                textLine.lineBase = (ChapterProvider.paddingTop + y -
-                        (layout.getLineBottom(lineIndex) - layout.getLineBaseline(lineIndex)))
+                textLine.lineTop = ChapterProvider.paddingTop + y + layout.getLineTop(lineIndex)
+                textLine.lineBase =
+                    ChapterProvider.paddingTop + y + layout.getLineBaseline(lineIndex)
                 textLine.lineBottom =
-                    textLine.lineBase + ChapterProvider.contentPaint.fontMetrics.descent
+                    ChapterProvider.paddingTop + y + layout.getLineBottom(lineIndex)
                 var x = ChapterProvider.paddingLeft +
                         (ChapterProvider.visibleWidth - layout.getLineMax(lineIndex)) / 2
                 textLine.text =

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

@@ -647,4 +647,5 @@
     <string name="tip_local_perm_request_storage">阅读需要访问存储卡权限，请点击下方的"授予权限"按钮，或前往“设置”—“应用权限”—打开所需权限。如果授予权限后仍然不正常，请点击右上角的“选择文件夹”，使用系统文件夹选择器。</string>
     <string name="alouding_disable">全文朗读中不能朗读选中文字</string>
     <string name="read_body_to_lh">扩展到刘海</string>
+    <string name="toc_updateing">更新目录中</string>
 </resources>