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@ -10,6 +10,7 @@ namespace Avalonia.Media.TextFormatting |
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private readonly double _paragraphWidth; |
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private readonly TextParagraphProperties _paragraphProperties; |
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private TextLineMetrics _textLineMetrics; |
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private TextLineBreak? _textLineBreak; |
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private readonly FlowDirection _resolvedFlowDirection; |
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public TextLineImpl(TextRun[] textRuns, int firstTextSourceIndex, int length, double paragraphWidth, |
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@ -18,7 +19,7 @@ namespace Avalonia.Media.TextFormatting |
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{ |
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FirstTextSourceIndex = firstTextSourceIndex; |
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Length = length; |
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TextLineBreak = lineBreak; |
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_textLineBreak = lineBreak; |
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HasCollapsed = hasCollapsed; |
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_textRuns = textRuns; |
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@ -38,7 +39,7 @@ namespace Avalonia.Media.TextFormatting |
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public override int Length { get; } |
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/// <inheritdoc/>
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public override TextLineBreak? TextLineBreak { get; } |
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public override TextLineBreak? TextLineBreak => _textLineBreak; |
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/// <inheritdoc/>
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public override bool HasCollapsed { get; } |
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@ -167,50 +168,54 @@ namespace Avalonia.Media.TextFormatting |
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{ |
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if (_textRuns.Length == 0) |
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{ |
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return new CharacterHit(); |
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return new CharacterHit(FirstTextSourceIndex); |
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} |
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distance -= Start; |
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var firstRunIndex = 0; |
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var lastIndex = _textRuns.Length - 1; |
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if (_textRuns[firstRunIndex] is TextEndOfLine) |
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if (_textRuns[lastIndex] is TextEndOfLine) |
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{ |
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firstRunIndex++; |
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lastIndex--; |
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} |
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if(firstRunIndex >= _textRuns.Length) |
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var currentPosition = FirstTextSourceIndex; |
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if (lastIndex < 0) |
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{ |
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return new CharacterHit(FirstTextSourceIndex); |
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return new CharacterHit(currentPosition); |
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} |
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if (distance <= 0) |
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{ |
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var firstRun = _textRuns[firstRunIndex]; |
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var firstRun = _textRuns[0]; |
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return GetRunCharacterHit(firstRun, FirstTextSourceIndex, 0); |
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if (_paragraphProperties.FlowDirection == FlowDirection.RightToLeft) |
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{ |
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currentPosition = Length - firstRun.Length; |
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} |
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return GetRunCharacterHit(firstRun, currentPosition, 0); |
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} |
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if (distance >= WidthIncludingTrailingWhitespace) |
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{ |
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var lastRun = _textRuns[_textRuns.Length - 1]; |
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var size = 0.0; |
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var lastRun = _textRuns[lastIndex]; |
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if (lastRun is DrawableTextRun drawableTextRun) |
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if (_paragraphProperties.FlowDirection == FlowDirection.LeftToRight) |
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{ |
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size = drawableTextRun.Size.Width; |
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currentPosition = Length - lastRun.Length; |
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} |
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return GetRunCharacterHit(lastRun, FirstTextSourceIndex + Length - lastRun.Length, size); |
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return GetRunCharacterHit(lastRun, currentPosition, distance); |
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} |
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// process hit that happens within the line
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var characterHit = new CharacterHit(); |
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var currentPosition = FirstTextSourceIndex; |
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var currentDistance = 0.0; |
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for (var i = 0; i < _textRuns.Length; i++) |
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for (var i = 0; i <= lastIndex; i++) |
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{ |
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var currentRun = _textRuns[i]; |
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@ -242,7 +247,7 @@ namespace Avalonia.Media.TextFormatting |
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currentRun = _textRuns[j]; |
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if(currentRun is not ShapedTextRun) |
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if (currentRun is not ShapedTextRun) |
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{ |
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continue; |
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} |
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@ -274,10 +279,6 @@ namespace Avalonia.Media.TextFormatting |
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continue; |
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} |
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} |
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else |
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{ |
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continue; |
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} |
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break; |
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} |
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@ -422,10 +423,10 @@ namespace Avalonia.Media.TextFormatting |
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{ |
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if (currentGlyphRun != null) |
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{ |
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distance = currentGlyphRun.Size.Width - distance; |
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currentDistance -= currentGlyphRun.Size.Width; |
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} |
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return Math.Max(0, currentDistance - distance); |
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return currentDistance + distance; |
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} |
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if (currentRun is DrawableTextRun drawableTextRun) |
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@ -575,386 +576,505 @@ namespace Avalonia.Media.TextFormatting |
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return GetPreviousCaretCharacterHit(characterHit); |
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} |
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private IReadOnlyList<TextBounds> GetTextBoundsLeftToRight(int firstTextSourceIndex, int textLength) |
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public override IReadOnlyList<TextBounds> GetTextBounds(int firstTextSourceIndex, int textLength) |
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{ |
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var characterIndex = firstTextSourceIndex + textLength; |
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if (_textRuns.Length == 0) |
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{ |
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return Array.Empty<TextBounds>(); |
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} |
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var result = new List<TextBounds>(_textRuns.Length); |
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var lastDirection = FlowDirection.LeftToRight; |
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var currentDirection = lastDirection; |
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var result = new List<TextBounds>(); |
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var currentPosition = FirstTextSourceIndex; |
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var remainingLength = textLength; |
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var startX = Start; |
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double currentWidth = 0; |
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var currentRect = default(Rect); |
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TextRunBounds lastRunBounds = default; |
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for (var index = 0; index < _textRuns.Length; index++) |
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static FlowDirection GetDirection(TextRun textRun, FlowDirection currentDirection) |
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{ |
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if (_textRuns[index] is not DrawableTextRun currentRun) |
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if (textRun is ShapedTextRun shapedTextRun) |
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{ |
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continue; |
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return shapedTextRun.ShapedBuffer.IsLeftToRight ? |
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FlowDirection.LeftToRight : |
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FlowDirection.RightToLeft; |
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} |
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var characterLength = 0; |
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var endX = startX; |
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TextRunBounds currentRunBounds; |
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return currentDirection; |
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} |
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double combinedWidth; |
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if (_paragraphProperties.FlowDirection == FlowDirection.LeftToRight) |
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{ |
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var currentX = Start; |
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if (currentRun is ShapedTextRun currentShapedRun) |
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for (int i = 0; i < _textRuns.Length; i++) |
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{ |
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var firstCluster = currentShapedRun.GlyphRun.Metrics.FirstCluster; |
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var currentRun = _textRuns[i]; |
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var firstRunIndex = i; |
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var lastRunIndex = firstRunIndex; |
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var currentDirection = GetDirection(currentRun, FlowDirection.LeftToRight); |
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var directionalWidth = 0.0; |
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if (currentPosition + currentRun.Length <= firstTextSourceIndex) |
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if (currentRun is DrawableTextRun currentDrawable) |
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{ |
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startX += currentRun.Size.Width; |
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directionalWidth = currentDrawable.Size.Width; |
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} |
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currentPosition += currentRun.Length; |
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// Find consecutive runs of same direction
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for (; lastRunIndex + 1 < _textRuns.Length; lastRunIndex++) |
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{ |
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var nextRun = _textRuns[lastRunIndex + 1]; |
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continue; |
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var nextDirection = GetDirection(nextRun, currentDirection); |
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if (currentDirection != nextDirection) |
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{ |
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break; |
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} |
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if (nextRun is DrawableTextRun nextDrawable) |
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{ |
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directionalWidth += nextDrawable.Size.Width; |
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} |
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} |
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if (currentShapedRun.ShapedBuffer.IsLeftToRight) |
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//Skip runs that are not part of the hit test range
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switch (currentDirection) |
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{ |
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var startIndex = firstCluster + Math.Max(0, firstTextSourceIndex - currentPosition); |
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case FlowDirection.RightToLeft: |
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{ |
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for (; lastRunIndex >= firstRunIndex; lastRunIndex--) |
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{ |
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currentRun = _textRuns[lastRunIndex]; |
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if (currentPosition + currentRun.Length > firstTextSourceIndex) |
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{ |
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break; |
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} |
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currentPosition += currentRun.Length; |
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double startOffset; |
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if (currentRun is DrawableTextRun drawableTextRun) |
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{ |
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directionalWidth -= drawableTextRun.Size.Width; |
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currentX += drawableTextRun.Size.Width; |
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} |
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double endOffset; |
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if(lastRunIndex - 1 < 0) |
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{ |
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break; |
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} |
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} |
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startOffset = currentShapedRun.GlyphRun.GetDistanceFromCharacterHit(new CharacterHit(startIndex)); |
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break; |
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} |
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default: |
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{ |
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for (; firstRunIndex <= lastRunIndex; firstRunIndex++) |
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{ |
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currentRun = _textRuns[firstRunIndex]; |
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endOffset = currentShapedRun.GlyphRun.GetDistanceFromCharacterHit(new CharacterHit(startIndex + remainingLength)); |
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if (currentPosition + currentRun.Length > firstTextSourceIndex) |
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{ |
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break; |
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} |
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startX += startOffset; |
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currentPosition += currentRun.Length; |
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endX += endOffset; |
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if (currentRun is DrawableTextRun drawableTextRun) |
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{ |
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currentX += drawableTextRun.Size.Width; |
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directionalWidth -= drawableTextRun.Size.Width; |
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} |
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var endHit = currentShapedRun.GlyphRun.GetCharacterHitFromDistance(endOffset, out _); |
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if(firstRunIndex + 1 == _textRuns.Length) |
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{ |
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break; |
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} |
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} |
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var startHit = currentShapedRun.GlyphRun.GetCharacterHitFromDistance(startOffset, out _); |
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break; |
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} |
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} |
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characterLength = Math.Abs(endHit.FirstCharacterIndex + endHit.TrailingLength - startHit.FirstCharacterIndex - startHit.TrailingLength); |
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i = lastRunIndex; |
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currentDirection = FlowDirection.LeftToRight; |
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if (directionalWidth == 0) |
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{ |
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continue; |
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} |
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else |
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var coveredLength = 0; |
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TextBounds? textBounds = null; |
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switch (currentDirection) |
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{ |
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var rightToLeftIndex = index; |
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var rightToLeftWidth = currentShapedRun.Size.Width; |
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while (rightToLeftIndex + 1 <= _textRuns.Length - 1 && _textRuns[rightToLeftIndex + 1] is ShapedTextRun nextShapedRun) |
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{ |
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if (nextShapedRun == null || nextShapedRun.ShapedBuffer.IsLeftToRight) |
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case FlowDirection.RightToLeft: |
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{ |
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textBounds = GetTextRunBoundsRightToLeft(firstRunIndex, lastRunIndex, currentX + directionalWidth, firstTextSourceIndex, |
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currentPosition, remainingLength, out coveredLength, out currentPosition); |
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currentX += directionalWidth; |
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break; |
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} |
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default: |
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{ |
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textBounds = GetTextBoundsLeftToRight(firstRunIndex, lastRunIndex, currentX, firstTextSourceIndex, |
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currentPosition, remainingLength, out coveredLength, out currentPosition); |
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rightToLeftIndex++; |
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rightToLeftWidth += nextShapedRun.Size.Width; |
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currentX = textBounds.Rectangle.Right; |
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if (currentPosition + nextShapedRun.Length > firstTextSourceIndex + textLength) |
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{ |
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break; |
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} |
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} |
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currentShapedRun = nextShapedRun; |
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} |
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if (coveredLength > 0) |
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{ |
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result.Add(textBounds); |
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remainingLength -= coveredLength; |
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} |
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if (remainingLength <= 0) |
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{ |
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break; |
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} |
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} |
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} |
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else |
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{ |
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var currentX = Start + WidthIncludingTrailingWhitespace; |
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startX += rightToLeftWidth; |
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for (int i = _textRuns.Length - 1; i >= 0; i--) |
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{ |
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var currentRun = _textRuns[i]; |
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var firstRunIndex = i; |
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var lastRunIndex = firstRunIndex; |
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var currentDirection = GetDirection(currentRun, FlowDirection.RightToLeft); |
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var directionalWidth = 0.0; |
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currentRunBounds = GetRightToLeftTextRunBounds(currentShapedRun, startX, firstTextSourceIndex, characterIndex, currentPosition, remainingLength); |
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if (currentRun is DrawableTextRun currentDrawable) |
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{ |
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directionalWidth = currentDrawable.Size.Width; |
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} |
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remainingLength -= currentRunBounds.Length; |
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currentPosition = currentRunBounds.TextSourceCharacterIndex + currentRunBounds.Length; |
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endX = currentRunBounds.Rectangle.Right; |
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startX = currentRunBounds.Rectangle.Left; |
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// Find consecutive runs of same direction
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for (; firstRunIndex - 1 > 0; firstRunIndex--) |
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{ |
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var previousRun = _textRuns[firstRunIndex - 1]; |
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var rightToLeftRunBounds = new List<TextRunBounds> { currentRunBounds }; |
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var previousDirection = GetDirection(previousRun, currentDirection); |
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for (int i = rightToLeftIndex - 1; i >= index; i--) |
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if (currentDirection != previousDirection) |
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{ |
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if (_textRuns[i] is not ShapedTextRun shapedRun) |
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break; |
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} |
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if (currentRun is DrawableTextRun previousDrawable) |
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{ |
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directionalWidth += previousDrawable.Size.Width; |
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} |
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} |
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//Skip runs that are not part of the hit test range
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switch (currentDirection) |
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{ |
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case FlowDirection.RightToLeft: |
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{ |
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continue; |
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} |
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for (; lastRunIndex >= firstRunIndex; lastRunIndex--) |
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{ |
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currentRun = _textRuns[lastRunIndex]; |
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currentShapedRun = shapedRun; |
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if (currentPosition + currentRun.Length <= firstTextSourceIndex) |
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{ |
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currentPosition += currentRun.Length; |
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currentRunBounds = GetRightToLeftTextRunBounds(currentShapedRun, startX, firstTextSourceIndex, characterIndex, currentPosition, remainingLength); |
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if (currentRun is DrawableTextRun drawableTextRun) |
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{ |
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currentX -= drawableTextRun.Size.Width; |
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directionalWidth -= drawableTextRun.Size.Width; |
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} |
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rightToLeftRunBounds.Insert(0, currentRunBounds); |
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continue; |
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} |
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remainingLength -= currentRunBounds.Length; |
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startX = currentRunBounds.Rectangle.Left; |
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break; |
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} |
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currentPosition += currentRunBounds.Length; |
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} |
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break; |
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} |
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default: |
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{ |
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for (; firstRunIndex <= lastRunIndex; firstRunIndex++) |
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{ |
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currentRun = _textRuns[firstRunIndex]; |
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combinedWidth = endX - startX; |
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if (currentPosition + currentRun.Length <= firstTextSourceIndex) |
|
|
|
{ |
|
|
|
currentPosition += currentRun.Length; |
|
|
|
|
|
|
|
currentRect = new Rect(startX, 0, combinedWidth, Height); |
|
|
|
if (currentRun is DrawableTextRun drawableTextRun) |
|
|
|
{ |
|
|
|
currentX += drawableTextRun.Size.Width; |
|
|
|
directionalWidth -= drawableTextRun.Size.Width; |
|
|
|
} |
|
|
|
|
|
|
|
currentDirection = FlowDirection.RightToLeft; |
|
|
|
continue; |
|
|
|
} |
|
|
|
|
|
|
|
if (!MathUtilities.IsZero(combinedWidth)) |
|
|
|
{ |
|
|
|
result.Add(new TextBounds(currentRect, currentDirection, rightToLeftRunBounds)); |
|
|
|
} |
|
|
|
break; |
|
|
|
} |
|
|
|
|
|
|
|
startX = endX; |
|
|
|
break; |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
else |
|
|
|
{ |
|
|
|
if (currentPosition + currentRun.Length <= firstTextSourceIndex) |
|
|
|
{ |
|
|
|
startX += currentRun.Size.Width; |
|
|
|
|
|
|
|
currentPosition += currentRun.Length; |
|
|
|
i = firstRunIndex; |
|
|
|
|
|
|
|
if (directionalWidth == 0) |
|
|
|
{ |
|
|
|
continue; |
|
|
|
} |
|
|
|
|
|
|
|
if (currentPosition < firstTextSourceIndex) |
|
|
|
{ |
|
|
|
startX += currentRun.Size.Width; |
|
|
|
} |
|
|
|
var coveredLength = 0; |
|
|
|
|
|
|
|
if (currentPosition + currentRun.Length <= characterIndex) |
|
|
|
TextBounds? textBounds = null; |
|
|
|
|
|
|
|
switch (currentDirection) |
|
|
|
{ |
|
|
|
endX += currentRun.Size.Width; |
|
|
|
case FlowDirection.LeftToRight: |
|
|
|
{ |
|
|
|
textBounds = GetTextBoundsLeftToRight(firstRunIndex, lastRunIndex, currentX - directionalWidth, firstTextSourceIndex, |
|
|
|
currentPosition, remainingLength, out coveredLength, out currentPosition); |
|
|
|
|
|
|
|
currentX -= directionalWidth; |
|
|
|
|
|
|
|
characterLength = currentRun.Length; |
|
|
|
break; |
|
|
|
} |
|
|
|
default: |
|
|
|
{ |
|
|
|
textBounds = GetTextRunBoundsRightToLeft(firstRunIndex, lastRunIndex, currentX, firstTextSourceIndex, |
|
|
|
currentPosition, remainingLength, out coveredLength, out currentPosition); |
|
|
|
|
|
|
|
currentX = textBounds.Rectangle.Left; |
|
|
|
|
|
|
|
break; |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
if (endX < startX) |
|
|
|
{ |
|
|
|
(endX, startX) = (startX, endX); |
|
|
|
} |
|
|
|
//Visual order is always left to right so we need to insert
|
|
|
|
result.Insert(0, textBounds); |
|
|
|
|
|
|
|
//Lines that only contain a linebreak need to be covered here
|
|
|
|
if (characterLength == 0) |
|
|
|
{ |
|
|
|
characterLength = NewLineLength; |
|
|
|
remainingLength -= coveredLength; |
|
|
|
|
|
|
|
if (remainingLength <= 0) |
|
|
|
{ |
|
|
|
break; |
|
|
|
} |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
combinedWidth = endX - startX; |
|
|
|
return result; |
|
|
|
} |
|
|
|
|
|
|
|
currentRunBounds = new TextRunBounds(new Rect(startX, 0, combinedWidth, Height), currentPosition, characterLength, currentRun); |
|
|
|
private TextBounds GetTextRunBoundsRightToLeft(int firstRunIndex, int lastRunIndex, double endX, |
|
|
|
int firstTextSourceIndex, int currentPosition, int remainingLength, out int coveredLength, out int newPosition) |
|
|
|
{ |
|
|
|
coveredLength = 0; |
|
|
|
var textRunBounds = new List<TextRunBounds>(); |
|
|
|
var startX = endX; |
|
|
|
|
|
|
|
currentPosition += characterLength; |
|
|
|
for (int i = lastRunIndex; i >= firstRunIndex; i--) |
|
|
|
{ |
|
|
|
var currentRun = _textRuns[i]; |
|
|
|
|
|
|
|
remainingLength -= characterLength; |
|
|
|
if (currentRun is ShapedTextRun shapedTextRun) |
|
|
|
{ |
|
|
|
var runBounds = GetRunBoundsRightToLeft(shapedTextRun, startX, firstTextSourceIndex, remainingLength, currentPosition, out var offset); |
|
|
|
|
|
|
|
startX = endX; |
|
|
|
textRunBounds.Insert(0, runBounds); |
|
|
|
|
|
|
|
if (currentRunBounds.TextRun != null && !MathUtilities.IsZero(combinedWidth) || NewLineLength > 0) |
|
|
|
{ |
|
|
|
if (result.Count > 0 && lastDirection == currentDirection && MathUtilities.AreClose(currentRect.Left, lastRunBounds.Rectangle.Right)) |
|
|
|
if (offset > 0) |
|
|
|
{ |
|
|
|
currentRect = currentRect.WithWidth(currentWidth + combinedWidth); |
|
|
|
endX = runBounds.Rectangle.Right; |
|
|
|
|
|
|
|
var textBounds = result[result.Count - 1]; |
|
|
|
startX = endX; |
|
|
|
} |
|
|
|
|
|
|
|
textBounds.Rectangle = currentRect; |
|
|
|
startX -= runBounds.Rectangle.Width; |
|
|
|
|
|
|
|
textBounds.TextRunBounds.Add(currentRunBounds); |
|
|
|
} |
|
|
|
else |
|
|
|
currentPosition += runBounds.Length + offset; |
|
|
|
|
|
|
|
coveredLength += runBounds.Length; |
|
|
|
|
|
|
|
remainingLength -= runBounds.Length; |
|
|
|
} |
|
|
|
else |
|
|
|
{ |
|
|
|
if (currentRun is DrawableTextRun drawableTextRun) |
|
|
|
{ |
|
|
|
currentRect = currentRunBounds.Rectangle; |
|
|
|
startX -= drawableTextRun.Size.Width; |
|
|
|
|
|
|
|
result.Add(new TextBounds(currentRect, currentDirection, new List<TextRunBounds> { currentRunBounds })); |
|
|
|
textRunBounds.Insert(0, |
|
|
|
new TextRunBounds( |
|
|
|
new Rect(startX, 0, drawableTextRun.Size.Width, Height), currentPosition, currentRun.Length, currentRun)); |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
lastRunBounds = currentRunBounds; |
|
|
|
currentPosition += currentRun.Length; |
|
|
|
|
|
|
|
coveredLength += currentRun.Length; |
|
|
|
|
|
|
|
currentWidth += combinedWidth; |
|
|
|
remainingLength -= currentRun.Length; |
|
|
|
} |
|
|
|
|
|
|
|
if (remainingLength <= 0 || currentPosition >= characterIndex) |
|
|
|
if (remainingLength <= 0) |
|
|
|
{ |
|
|
|
break; |
|
|
|
} |
|
|
|
|
|
|
|
lastDirection = currentDirection; |
|
|
|
} |
|
|
|
|
|
|
|
return result; |
|
|
|
} |
|
|
|
newPosition = currentPosition; |
|
|
|
|
|
|
|
private IReadOnlyList<TextBounds> GetTextBoundsRightToLeft(int firstTextSourceIndex, int textLength) |
|
|
|
{ |
|
|
|
var characterIndex = firstTextSourceIndex + textLength; |
|
|
|
var runWidth = endX - startX; |
|
|
|
|
|
|
|
var result = new List<TextBounds>(_textRuns.Length); |
|
|
|
var lastDirection = FlowDirection.LeftToRight; |
|
|
|
var currentDirection = lastDirection; |
|
|
|
var bounds = new Rect(startX, 0, runWidth, Height); |
|
|
|
|
|
|
|
var currentPosition = FirstTextSourceIndex; |
|
|
|
var remainingLength = textLength; |
|
|
|
return new TextBounds(bounds, FlowDirection.RightToLeft, textRunBounds); |
|
|
|
} |
|
|
|
|
|
|
|
var startX = WidthIncludingTrailingWhitespace; |
|
|
|
double currentWidth = 0; |
|
|
|
var currentRect = default(Rect); |
|
|
|
private TextBounds GetTextBoundsLeftToRight(int firstRunIndex, int lastRunIndex, double startX, |
|
|
|
int firstTextSourceIndex, int currentPosition, int remainingLength, out int coveredLength, out int newPosition) |
|
|
|
{ |
|
|
|
coveredLength = 0; |
|
|
|
var textRunBounds = new List<TextRunBounds>(); |
|
|
|
var endX = startX; |
|
|
|
|
|
|
|
for (var index = _textRuns.Length - 1; index >= 0; index--) |
|
|
|
for (int i = firstRunIndex; i <= lastRunIndex; i++) |
|
|
|
{ |
|
|
|
if (_textRuns[index] is not DrawableTextRun currentRun) |
|
|
|
{ |
|
|
|
continue; |
|
|
|
} |
|
|
|
|
|
|
|
if (currentPosition + currentRun.Length < firstTextSourceIndex) |
|
|
|
{ |
|
|
|
startX -= currentRun.Size.Width; |
|
|
|
|
|
|
|
currentPosition += currentRun.Length; |
|
|
|
|
|
|
|
continue; |
|
|
|
} |
|
|
|
|
|
|
|
var characterLength = 0; |
|
|
|
var endX = startX; |
|
|
|
var currentRun = _textRuns[i]; |
|
|
|
|
|
|
|
if (currentRun is ShapedTextRun currentShapedRun) |
|
|
|
if (currentRun is ShapedTextRun shapedTextRun) |
|
|
|
{ |
|
|
|
var offset = Math.Max(0, firstTextSourceIndex - currentPosition); |
|
|
|
|
|
|
|
currentPosition += offset; |
|
|
|
|
|
|
|
var startIndex = currentPosition; |
|
|
|
double startOffset; |
|
|
|
double endOffset; |
|
|
|
var runBounds = GetRunBoundsLeftToRight(shapedTextRun, endX, firstTextSourceIndex, remainingLength, currentPosition, out var offset); |
|
|
|
|
|
|
|
if (currentShapedRun.ShapedBuffer.IsLeftToRight) |
|
|
|
{ |
|
|
|
if (currentPosition < startIndex) |
|
|
|
{ |
|
|
|
startOffset = endOffset = 0; |
|
|
|
} |
|
|
|
else |
|
|
|
{ |
|
|
|
endOffset = currentShapedRun.GlyphRun.GetDistanceFromCharacterHit(new CharacterHit(startIndex + remainingLength)); |
|
|
|
textRunBounds.Add(runBounds); |
|
|
|
|
|
|
|
startOffset = currentShapedRun.GlyphRun.GetDistanceFromCharacterHit(new CharacterHit(startIndex)); |
|
|
|
} |
|
|
|
} |
|
|
|
else |
|
|
|
if (offset > 0) |
|
|
|
{ |
|
|
|
endOffset = currentShapedRun.GlyphRun.GetDistanceFromCharacterHit(new CharacterHit(startIndex)); |
|
|
|
startX = runBounds.Rectangle.Left; |
|
|
|
|
|
|
|
startOffset = currentShapedRun.GlyphRun.GetDistanceFromCharacterHit(new CharacterHit(startIndex + remainingLength)); |
|
|
|
endX = startX; |
|
|
|
} |
|
|
|
|
|
|
|
startX -= currentRun.Size.Width - startOffset; |
|
|
|
endX -= currentRun.Size.Width - endOffset; |
|
|
|
currentPosition += runBounds.Length + offset; |
|
|
|
|
|
|
|
var endHit = currentShapedRun.GlyphRun.GetCharacterHitFromDistance(endOffset, out _); |
|
|
|
var startHit = currentShapedRun.GlyphRun.GetCharacterHitFromDistance(startOffset, out _); |
|
|
|
endX += runBounds.Rectangle.Width; |
|
|
|
|
|
|
|
characterLength = Math.Abs(startHit.FirstCharacterIndex + startHit.TrailingLength - endHit.FirstCharacterIndex - endHit.TrailingLength); |
|
|
|
coveredLength += runBounds.Length; |
|
|
|
|
|
|
|
currentDirection = currentShapedRun.ShapedBuffer.IsLeftToRight ? |
|
|
|
FlowDirection.LeftToRight : |
|
|
|
FlowDirection.RightToLeft; |
|
|
|
remainingLength -= runBounds.Length; |
|
|
|
} |
|
|
|
else |
|
|
|
{ |
|
|
|
if (currentPosition + currentRun.Length <= characterIndex) |
|
|
|
if (currentRun is DrawableTextRun drawableTextRun) |
|
|
|
{ |
|
|
|
endX -= currentRun.Size.Width; |
|
|
|
textRunBounds.Add( |
|
|
|
new TextRunBounds( |
|
|
|
new Rect(endX, 0, drawableTextRun.Size.Width, Height), currentPosition, currentRun.Length, currentRun)); |
|
|
|
|
|
|
|
endX += drawableTextRun.Size.Width; |
|
|
|
} |
|
|
|
|
|
|
|
if (currentPosition < firstTextSourceIndex) |
|
|
|
{ |
|
|
|
startX -= currentRun.Size.Width; |
|
|
|
currentPosition += currentRun.Length; |
|
|
|
|
|
|
|
characterLength = currentRun.Length; |
|
|
|
} |
|
|
|
} |
|
|
|
coveredLength += currentRun.Length; |
|
|
|
|
|
|
|
if (endX < startX) |
|
|
|
{ |
|
|
|
(endX, startX) = (startX, endX); |
|
|
|
remainingLength -= currentRun.Length; |
|
|
|
} |
|
|
|
|
|
|
|
//Lines that only contain a linebreak need to be covered here
|
|
|
|
if (characterLength == 0) |
|
|
|
if (remainingLength <= 0) |
|
|
|
{ |
|
|
|
characterLength = NewLineLength; |
|
|
|
break; |
|
|
|
} |
|
|
|
} |
|
|
|
|
|
|
|
var runWidth = endX - startX; |
|
|
|
newPosition = currentPosition; |
|
|
|
|
|
|
|
var currentRunBounds = new TextRunBounds(new Rect(Start + startX, 0, runWidth, Height), currentPosition, characterLength, currentRun); |
|
|
|
var runWidth = endX - startX; |
|
|
|
|
|
|
|
if (!MathUtilities.IsZero(runWidth) || NewLineLength > 0) |
|
|
|
{ |
|
|
|
if (lastDirection == currentDirection && result.Count > 0 && MathUtilities.AreClose(currentRect.Right, Start + startX)) |
|
|
|
{ |
|
|
|
currentRect = currentRect.WithWidth(currentWidth + runWidth); |
|
|
|
var bounds = new Rect(startX, 0, runWidth, Height); |
|
|
|
|
|
|
|
var textBounds = result[result.Count - 1]; |
|
|
|
return new TextBounds(bounds, FlowDirection.LeftToRight, textRunBounds); |
|
|
|
} |
|
|
|
|
|
|
|
textBounds.Rectangle = currentRect; |
|
|
|
private TextRunBounds GetRunBoundsLeftToRight(ShapedTextRun currentRun, double startX, |
|
|
|
int firstTextSourceIndex, int remainingLength, int currentPosition, out int offset) |
|
|
|
{ |
|
|
|
var startIndex = currentPosition; |
|
|
|
|
|
|
|
textBounds.TextRunBounds.Add(currentRunBounds); |
|
|
|
} |
|
|
|
else |
|
|
|
{ |
|
|
|
currentRect = currentRunBounds.Rectangle; |
|
|
|
offset = Math.Max(0, firstTextSourceIndex - currentPosition); |
|
|
|
|
|
|
|
result.Add(new TextBounds(currentRect, currentDirection, new List<TextRunBounds> { currentRunBounds })); |
|
|
|
} |
|
|
|
} |
|
|
|
var firstCluster = currentRun.GlyphRun.Metrics.FirstCluster; |
|
|
|
|
|
|
|
currentWidth += runWidth; |
|
|
|
currentPosition += characterLength; |
|
|
|
if (currentPosition != firstCluster) |
|
|
|
{ |
|
|
|
startIndex = firstCluster + offset; |
|
|
|
} |
|
|
|
else |
|
|
|
{ |
|
|
|
startIndex += offset; |
|
|
|
} |
|
|
|
|
|
|
|
if (currentPosition > characterIndex) |
|
|
|
{ |
|
|
|
break; |
|
|
|
} |
|
|
|
var startOffset = currentRun.GlyphRun.GetDistanceFromCharacterHit(new CharacterHit(startIndex)); |
|
|
|
var endOffset = currentRun.GlyphRun.GetDistanceFromCharacterHit(new CharacterHit(startIndex + remainingLength)); |
|
|
|
|
|
|
|
lastDirection = currentDirection; |
|
|
|
remainingLength -= characterLength; |
|
|
|
var endX = startX + endOffset; |
|
|
|
startX += startOffset; |
|
|
|
|
|
|
|
if (remainingLength <= 0) |
|
|
|
{ |
|
|
|
break; |
|
|
|
} |
|
|
|
var startHit = currentRun.GlyphRun.GetCharacterHitFromDistance(startOffset, out _); |
|
|
|
var endHit = currentRun.GlyphRun.GetCharacterHitFromDistance(endOffset, out _); |
|
|
|
|
|
|
|
var characterLength = Math.Abs(startHit.FirstCharacterIndex + startHit.TrailingLength - endHit.FirstCharacterIndex - endHit.TrailingLength); |
|
|
|
|
|
|
|
if (endX < startX) |
|
|
|
{ |
|
|
|
(endX, startX) = (startX, endX); |
|
|
|
} |
|
|
|
|
|
|
|
//Lines that only contain a linebreak need to be covered here
|
|
|
|
if (characterLength == 0) |
|
|
|
{ |
|
|
|
characterLength = NewLineLength; |
|
|
|
} |
|
|
|
|
|
|
|
result.Reverse(); |
|
|
|
var runWidth = endX - startX; |
|
|
|
|
|
|
|
return result; |
|
|
|
return new TextRunBounds(new Rect(startX, 0, runWidth, Height), currentPosition, characterLength, currentRun); |
|
|
|
} |
|
|
|
|
|
|
|
private TextRunBounds GetRightToLeftTextRunBounds(ShapedTextRun currentRun, double endX, int firstTextSourceIndex, int characterIndex, int currentPosition, int remainingLength) |
|
|
|
private TextRunBounds GetRunBoundsRightToLeft(ShapedTextRun currentRun, double endX, |
|
|
|
int firstTextSourceIndex, int remainingLength, int currentPosition, out int offset) |
|
|
|
{ |
|
|
|
var startX = endX; |
|
|
|
|
|
|
|
var offset = Math.Max(0, firstTextSourceIndex - currentPosition); |
|
|
|
var startIndex = currentPosition; |
|
|
|
|
|
|
|
currentPosition += offset; |
|
|
|
offset = Math.Max(0, firstTextSourceIndex - currentPosition); |
|
|
|
|
|
|
|
var startIndex = currentPosition; |
|
|
|
var firstCluster = currentRun.GlyphRun.Metrics.FirstCluster; |
|
|
|
|
|
|
|
double startOffset; |
|
|
|
double endOffset; |
|
|
|
if (currentPosition != firstCluster) |
|
|
|
{ |
|
|
|
startIndex = firstCluster + offset; |
|
|
|
} |
|
|
|
else |
|
|
|
{ |
|
|
|
startIndex += offset; |
|
|
|
} |
|
|
|
|
|
|
|
endOffset = currentRun.GlyphRun.GetDistanceFromCharacterHit(new CharacterHit(startIndex)); |
|
|
|
var endOffset = currentRun.GlyphRun.GetDistanceFromCharacterHit(new CharacterHit(startIndex)); |
|
|
|
|
|
|
|
startOffset = currentRun.GlyphRun.GetDistanceFromCharacterHit(new CharacterHit(startIndex + remainingLength)); |
|
|
|
var startOffset = currentRun.GlyphRun.GetDistanceFromCharacterHit(new CharacterHit(startIndex + remainingLength)); |
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startX -= currentRun.Size.Width - startOffset; |
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endX -= currentRun.Size.Width - endOffset; |
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@ -980,16 +1100,6 @@ namespace Avalonia.Media.TextFormatting |
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return new TextRunBounds(new Rect(Start + startX, 0, runWidth, Height), currentPosition, characterLength, currentRun); |
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} |
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public override IReadOnlyList<TextBounds> GetTextBounds(int firstTextSourceIndex, int textLength) |
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{ |
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if (_paragraphProperties.FlowDirection == FlowDirection.LeftToRight) |
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{ |
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return GetTextBoundsLeftToRight(firstTextSourceIndex, textLength); |
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} |
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return GetTextBoundsRightToLeft(firstTextSourceIndex, textLength); |
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} |
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public override void Dispose() |
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{ |
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for (int i = 0; i < _textRuns.Length; i++) |
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@ -1005,6 +1115,11 @@ namespace Avalonia.Media.TextFormatting |
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{ |
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_textLineMetrics = CreateLineMetrics(); |
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if (_textLineBreak is null && _textRuns.Length > 1 && _textRuns[_textRuns.Length - 1] is TextEndOfLine textEndOfLine) |
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{ |
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_textLineBreak = new TextLineBreak(textEndOfLine); |
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} |
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BidiReorderer.Instance.BidiReorder(_textRuns, _resolvedFlowDirection); |
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} |
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@ -1328,7 +1443,7 @@ namespace Avalonia.Media.TextFormatting |
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{ |
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width = widthIncludingWhitespace + textRun.GlyphRun.Metrics.Width; |
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trailingWhitespaceLength = textRun.GlyphRun.Metrics.TrailingWhitespaceLength; |
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newLineLength = textRun.GlyphRun.Metrics.NewLineLength; |
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newLineLength += textRun.GlyphRun.Metrics.NewLineLength; |
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} |
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widthIncludingWhitespace += textRun.Size.Width; |
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@ -1340,31 +1455,10 @@ namespace Avalonia.Media.TextFormatting |
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{ |
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widthIncludingWhitespace += drawableTextRun.Size.Width; |
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switch (_paragraphProperties.FlowDirection) |
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if (index == lastRunIndex) |
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{ |
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case FlowDirection.LeftToRight: |
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{ |
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if (index == lastRunIndex) |
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{ |
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width = widthIncludingWhitespace; |
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trailingWhitespaceLength = 0; |
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newLineLength = 0; |
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} |
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break; |
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} |
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case FlowDirection.RightToLeft: |
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{ |
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if (index == lastRunIndex) |
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{ |
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width = widthIncludingWhitespace; |
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trailingWhitespaceLength = 0; |
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newLineLength = 0; |
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} |
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break; |
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} |
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width = widthIncludingWhitespace; |
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trailingWhitespaceLength = 0; |
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} |
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if (drawableTextRun.Size.Height > height) |
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Steven Kirk
4 years ago
GitHub