feat: 优化代码

app/src/main/java/io/legado/app/model/webBook/BookChapterList.kt

@@ -95,21 +95,57 @@ object BookChapterList {
                     }
                     Debug.log(bookSource.bookSourceUrl, "◇目录总页数:${nextUrlList.size}")
                     for (item in chapterDataList) {
+                        downloadToc(
+                            coroutineScope,
+                            item,
+                            book,
+                            bookSource,
+                            analyzeRule,
+                            tocRule,
+                            listRule,
+                            chapterList,
+                            chapterDataList,
+                            {
+                                block.resume(finish(book, chapterList, reverse))
+                            }, {
+                                block.cancel(it)
+                            })
+                    }
+                }
+            }
+        } catch (e: Exception) {
+            block.resumeWithException(e)
+        }
+    }
+
+    private fun downloadToc(
+        coroutineScope: CoroutineScope,
+        chapterData: ChapterData<String>,
+        book: Book,
+        bookSource: BookSource,
+        analyzeRule: AnalyzeRule,
+        tocRule: TocRule,
+        listRule: String,
+        chapterList: ArrayList<BookChapter>,
+        chapterDataList: ArrayList<ChapterData<String>>,
+        onFinish: () -> Unit,
+        onError: (e: Throwable) -> Unit
+    ) {
         Coroutine.async(scope = coroutineScope) {
             val nextBody = AnalyzeUrl(
-                                ruleUrl = item.nextUrl,
+                ruleUrl = chapterData.nextUrl,
                 book = book,
                 headerMapF = bookSource.getHeaderMap()
             ).getResponseAwait().body
             val nextChapterData = analyzeChapterList(
-                                analyzeRule.setContent(nextBody, item.nextUrl),
+                analyzeRule.setContent(nextBody, chapterData.nextUrl),
-                                book.bookUrl, item.nextUrl, tocRule, listRule, bookSource,
+                book.bookUrl, chapterData.nextUrl, tocRule, listRule, bookSource,
                 false
             )
             synchronized(chapterDataList) {
                 val isFinished = addChapterListIsFinish(
                     chapterDataList,
-                                    item,
+                    chapterData,
                     nextChapterData.chapterList
                 )
                 if (isFinished) {
@@ -118,17 +154,11 @@ object BookChapterList {
                             chapterList.addAll(it)
                         }
                     }
-                                    block.resume(finish(book, chapterList, reverse))
+                    onFinish()
                 }
             }
         }.onError {
-                            block.resumeWithException(it)
+            onError(it)
-                        }
-                    }
-                }
-            }
-        } catch (e: Exception) {
-            block.resumeWithException(e)
         }
     }
 

app/src/main/java/io/legado/app/ui/filechooser/FilePicker.kt

@@ -21,7 +21,7 @@ object FilePicker {
                 selectList.removeAt(0)
             }
             items(selectList) { _, index ->
-                when (index) {
+                when (if (default == null) index - 1 else index) {
                     0 -> default?.invoke()
                     1 -> {
                         try {
@@ -60,7 +60,7 @@ object FilePicker {
                     selectList.removeAt(0)
                 }
                 items(selectList) { _, index ->
-                    when (index) {
+                    when (if (default == null) index - 1 else index) {
                         0 -> default?.invoke()
                         1 -> {
                             try {
@@ -104,7 +104,7 @@ object FilePicker {
                 selectList.removeAt(0)
             }
             items(selectList) { _, index ->
-                when (index) {
+                when (if (default == null) index - 1 else index) {
                     0 -> default?.invoke()
                     1 -> {
                         try {
@@ -152,7 +152,7 @@ object FilePicker {
                     selectList.removeAt(0)
                 }
                 items(selectList) { _, index ->
-                    when (index) {
+                    when (if (default == null) index - 1 else index) {
                         0 -> default?.invoke()
                         1 -> {
                             try {