wip

Author: LongCatIsLooong

shell/platform/android/BUILD.gn

@@ -216,6 +216,7 @@ android_java_sources = [
   "io/flutter/plugin/editing/FlutterTextUtils.java",
   "io/flutter/plugin/editing/ImeSyncDeferringInsetsCallback.java",
   "io/flutter/plugin/editing/InputConnectionAdaptor.java",
+  "io/flutter/plugin/editing/ListenableEditingState.java",
   "io/flutter/plugin/editing/TextInputPlugin.java",
   "io/flutter/plugin/localization/LocalizationPlugin.java",
   "io/flutter/plugin/mouse/MouseCursorPlugin.java",

shell/platform/android/io/flutter/embedding/engine/systemchannels/TextInputChannel.java

@@ -692,6 +692,14 @@ public TextEditState(
         int selectionEnd,
         int composingStart,
         int composingEnd) {
+
+      assert (selectionStart == -1 && selectionEnd == -1)
+          || (selectionStart >= 0 && selectionStart <= selectionEnd);
+      assert (composingStart == -1 && composingEnd == -1)
+          || (composingStart >= 0 && composingStart < composingEnd);
+      assert composingEnd <= text.length();
+      assert selectionEnd <= text.length();
+
       this.text = text;
       this.selectionStart = selectionStart;
       this.selectionEnd = selectionEnd;