[Bug report] extende_text_field图文混合输入中，当输入框中只有图片时，添加换行符“\n”后，下一行行高会是“图片元素”的高度，输入一个字后，行高会缩小为“文字字号”高度，用户看到会行高闪烁问题 #240
Description
Version
14.0.0
Platforms
iOS
Device Model
iphoneXR（iOS15.1）
flutter info
flutter doctor -v
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• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 54e66469a9 (3 months ago), 2024-04-17 13:08:03 -0700
• Engine revision c4cd48e186
• Dart version 3.3.4
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• Platform android-34, build-tools 31.0.0
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• Java version OpenJDK Runtime Environment (build 17.0.7+0-17.0.7b1000.6-10550314)
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• Java version OpenJDK Runtime Environment (build 17.0.7+0-17.0.7b1000.6-10550314)How to reproduce?
遇到一个extended-text-field 图文混排的行高问题，demo也有这情况。场景是：输入框中只有“图片元素”时，添加换行符“\n”后，下一行行高会是“图片元素”的高度，输入一个字后，行高会缩小为“文字字号”高度，用户看到会行高闪烁问题。
Logs
No response
Example code (optional)
Container(
height: 200,
child: ExtendedTextField(
key: _key,
// minLines: 1,
maxLines: null,
// expands: true,
// maxLines: 2,
// StrutStyle get strutStyle {
// if (_strutStyle == null) {
// return StrutStyle.fromTextStyle(style, forceStrutHeight: true);
// }
// return _strutStyle!.inheritFromTextStyle(style);
// }
//
textInputAction: TextInputAction.newline,
strutStyle: const StrutStyle(),
specialTextSpanBuilder: MySpecialTextSpanBuilder(
showAtBackground: true,
),
controller: _textEditingController,
selectionControls: _myExtendedMaterialTextSelectionControls,
extendedContextMenuBuilder: MyTextSelectionControls.defaultContextMenuBuilder,
focusNode: _focusNode,
decoration: InputDecoration(
suffixIcon: GestureDetector(
onTap: () {
setState(() {
sessions.insert(0, _textEditingController.text);
_textEditingController.value = _textEditingController.value.copyWith(text: '', selection: const TextSelection.collapsed(offset: 0), composing: TextRange.empty);
});
},
child: const Icon(Icons.send),
),
contentPadding: const EdgeInsets.all(12.0)),
//textDirection: TextDirection.rtl,
),
),