优化

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

@@ -1,5 +1,6 @@
 package io.legado.app.model.localBook
 
+import io.legado.app.constant.AppLog
 import io.legado.app.data.appDb
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
@@ -14,6 +15,7 @@ import java.io.FileNotFoundException
 import java.nio.charset.Charset
 import java.util.regex.Matcher
 import java.util.regex.Pattern
+import java.util.regex.PatternSyntaxException
 import kotlin.math.min
 
 class TextFile(private var book: Book) {
@@ -395,7 +397,12 @@ class TextFile(private var book: Book) {
         var maxCs = 1
         var tocPattern: Pattern? = null
         for (tocRule in rules) {
-            val pattern = tocRule.rule.toPattern(Pattern.MULTILINE)
+            val pattern = try {
+                tocRule.rule.toPattern(Pattern.MULTILINE)
+            } catch (e: PatternSyntaxException) {
+                AppLog.put("TXT目录规则正则语法错误:${tocRule.name}\n$e", e)
+                continue
+            }
             val matcher = pattern.matcher(content)
             var cs = 0
             while (matcher.find()) {

app/src/main/java/io/legado/app/ui/book/toc/rule/TxtTocRuleEditDialog.kt

@@ -10,6 +10,7 @@ import androidx.fragment.app.viewModels
 import io.legado.app.R
 import io.legado.app.base.BaseDialogFragment
 import io.legado.app.base.BaseViewModel
+import io.legado.app.constant.AppLog
 import io.legado.app.data.appDb
 import io.legado.app.data.entities.TxtTocRule
 import io.legado.app.databinding.DialogTocRegexEditBinding
@@ -18,6 +19,8 @@ import io.legado.app.lib.theme.primaryColor
 import io.legado.app.utils.*
 import io.legado.app.utils.viewbindingdelegate.viewBinding
 import kotlinx.coroutines.Dispatchers
+import java.util.regex.Pattern
+import java.util.regex.PatternSyntaxException
 
 class TxtTocRuleEditDialog() : BaseDialogFragment(R.layout.dialog_toc_regex_edit, true),
     Toolbar.OnMenuItemClickListener {
@@ -55,8 +58,11 @@ class TxtTocRuleEditDialog() : BaseDialogFragment(R.layout.dialog_toc_regex_edit
     override fun onMenuItemClick(item: MenuItem?): Boolean {
         when (item?.itemId) {
             R.id.menu_save -> {
-                callback?.saveTxtTocRule(getRuleFromView())
+                val tocRule = getRuleFromView()
-                dismissAllowingStateLoss()
+                if (checkValid(tocRule)) {
+                    callback?.saveTxtTocRule(getRuleFromView())
+                    dismissAllowingStateLoss()
+                }
             }
             R.id.menu_copy_rule -> context?.sendToClip(GSON.toJson(getRuleFromView()))
             R.id.menu_paste_rule -> viewModel.pasteRule {
@@ -66,6 +72,22 @@ class TxtTocRuleEditDialog() : BaseDialogFragment(R.layout.dialog_toc_regex_edit
         return true
     }
 
+    private fun checkValid(tocRule: TxtTocRule): Boolean {
+        if (tocRule.name.isEmpty()) {
+            toastOnUi("名称不能为空")
+            return false
+        }
+
+        try {
+            Pattern.compile(tocRule.rule, Pattern.MULTILINE)
+        } catch (ex: PatternSyntaxException) {
+            AppLog.put("正则语法错误或不支持(txt)：${ex.localizedMessage}", ex, true)
+            return false
+        }
+
+        return true
+    }
+
     private fun upRuleView(tocRule: TxtTocRule?) {
         binding.tvRuleName.setText(tocRule?.name)
         binding.tvRuleRegex.setText(tocRule?.rule)