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Merge pull request #885 from LucasXu0/improve_cursor_display_style
chore: improve cursor display style
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commit
f224bf8087
@ -65,18 +65,35 @@ class _FlowyRichTextState extends State<FlowyRichText> with Selectable {
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@override
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Rect? getCursorRectInPosition(Position position) {
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final textPosition = TextPosition(offset: position.offset);
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final cursorOffset =
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_renderParagraph.getOffsetForCaret(textPosition, Rect.zero);
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final cursorHeight = widget.cursorHeight ??
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_renderParagraph.getFullHeightForCaret(textPosition) ??
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_placeholderRenderParagraph.getFullHeightForCaret(textPosition) ??
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16.0; // default height
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var cursorHeight = _renderParagraph.getFullHeightForCaret(textPosition);
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var cursorOffset =
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_renderParagraph.getOffsetForCaret(textPosition, Rect.zero);
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if (cursorHeight == null) {
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cursorHeight =
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_placeholderRenderParagraph.getFullHeightForCaret(textPosition);
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cursorOffset = _placeholderRenderParagraph.getOffsetForCaret(
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textPosition, Rect.zero);
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}
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if (cursorHeight != null) {
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// workaround: Calling the `getFullHeightForCaret` function will return
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// the full height of rich text component instead of the plain text
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// if we set the line height.
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// So need to divide by the line height to get the expected value.
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//
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// And the default height of plain text is too short. Add a magic height
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// to expand it.
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const magicHeight = 3.0;
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cursorOffset = cursorOffset.translate(
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0, (cursorHeight - cursorHeight / _lineHeight) / 2.0);
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cursorHeight /= _lineHeight;
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cursorHeight += magicHeight;
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}
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final rect = Rect.fromLTWH(
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cursorOffset.dx - (widget.cursorWidth / 2),
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cursorOffset.dy,
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widget.cursorWidth,
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cursorHeight,
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widget.cursorHeight ?? cursorHeight ?? 16.0,
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);
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return rect;
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}
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