[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

[ChanKen]

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
    • DevTools version 2.31.1
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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,
              ),
            ),

Contact

jin22dc@163.com

[ChanKen]

https://github.com/user-attachments/assets/68d8fee9-2c02-4280-a643-575c7d3107e8