protected override Size MeasureOverride(Size availableSize)
{
if (m_layout != null)
{
Typeface typeface = TextElementUtility.GetTypeface(this);
m_emSize = Math.Max(TextElement.GetFontSize(this), 10.0 * 4 / 3);
FormattedText text = CreateFormattedText("8888", typeface);
m_layout = m_layout.WithLineHeight(text.Height);
}
return(availableSize);
}
private void Render(DrawingContext drawingContext)
{
drawingContext.DrawRectangle(Brushes.White, null, new Rect(new Point(), RenderSize));
if (m_blame == null || m_emSize == 0)
{
return;
}
Typeface typeface = TextElementUtility.GetTypeface(this);
BlameLayout layout = m_layout.WithRenderSize(RenderSize);
foreach (Rect newLineRectangle in layout.NewLines)
{
drawingContext.DrawRectangle(m_newLineBrush, null, newLineRectangle);
}
foreach (DisplayBlock block in layout.Blocks)
{
Rect blockRectangle = block.CommitPosition;
drawingContext.DrawRectangle(m_personBrush[block.AuthorIndex], null, block.AuthorPosition);
drawingContext.DrawRectangle(GetOrCreateCommitBrush(block), null, blockRectangle);
drawingContext.DrawLine(new Pen(Brushes.LightGray, 1), new Point(0, blockRectangle.Bottom + 0.5), new Point(RenderSize.Width, blockRectangle.Bottom + 0.5));
FormattedText authorText = CreateSmallFormattedText(block.AuthorName, typeface, block.AuthorWidth);
drawingContext.DrawText(authorText, new Point(block.AuthorX, block.TextY));
FormattedText dateText = CreateSmallFormattedText(block.Date, typeface, block.DateWidth);
dateText.TextAlignment = TextAlignment.Right;
drawingContext.DrawText(dateText, new Point(block.DateX, block.TextY));
if (block.ShowsSummary)
{
Rect summaryPosition = block.SummaryPosition;
FormattedText commitText = CreateSmallFormattedText(block.Summary, typeface, summaryPosition.Width);
commitText.MaxLineCount = commitText.Height == 0 ? 1 : Math.Max(1, (int)(summaryPosition.Height / commitText.Height));
commitText.Trimming = TextTrimming.WordEllipsis;
drawingContext.DrawText(commitText, summaryPosition.TopLeft);
}
}
Column lineNumberColumn = layout.LineNumberColumn;
double yOffset = 0;
double lineNumberWidth = lineNumberColumn.Width;
foreach (DisplayLine line in layout.Lines)
{
FormattedText lineNumberText = CreateFormattedText(line.LineNumber.ToString(CultureInfo.InvariantCulture), typeface);
lineNumberText.TextAlignment = TextAlignment.Right;
lineNumberText.SetForegroundBrush(m_lineNumberBrush);
lineNumberWidth = Math.Max(lineNumberWidth, lineNumberText.Width);
lineNumberText.MaxTextWidth = lineNumberWidth;
drawingContext.DrawText(lineNumberText, new Point(lineNumberColumn.Left, yOffset));
yOffset += layout.LineHeight;
}
layout = layout.WithLineNumberWidth(lineNumberWidth);
Column codeColumn = layout.CodeColumn;
Geometry clipGeometry = new RectangleGeometry(new Rect(codeColumn.Left, 0, RenderSize.Width - codeColumn.Left, RenderSize.Height));
drawingContext.PushClip(clipGeometry);
yOffset = 0;
foreach (DisplayLine line in layout.Lines)
{
double xOffset = layout.CodeColumn.Left - HorizontalOffset;
foreach (LinePart part in line.Parts)
{
FormattedText text = CreateFormattedText(string.Join("", part.Text.Replace("\t", " ")), typeface);
if (!line.IsNew && part.Status == LinePartStatus.New)
{
drawingContext.DrawRectangle(m_changedTextBrush, null, new Rect(xOffset, yOffset, text.WidthIncludingTrailingWhitespace, layout.LineHeight));
}
drawingContext.DrawText(text, new Point(xOffset, yOffset));
xOffset += text.WidthIncludingTrailingWhitespace;
}
layout = layout.WithCodeWidth(xOffset - codeColumn.Left + HorizontalOffset);
yOffset += layout.LineHeight;
}
drawingContext.Pop();
double commitRightX = layout.CommitColumn.Right;
drawingContext.DrawLine(new Pen(Brushes.DarkGray, 1), new Point(commitRightX, 0), new Point(commitRightX, Math.Min(yOffset, RenderSize.Height)));
double lineNumberRightX = layout.CodeMarginColumn.Right;
drawingContext.DrawLine(new Pen(Brushes.DarkGray, 1), new Point(lineNumberRightX, 0), new Point(lineNumberRightX, Math.Min(yOffset, RenderSize.Height)));
SetHorizontalScrollInfo(layout.Width, RenderSize.Width, null);
if (layout != m_layout)
{
m_layout = layout;
RedrawSoon();
}
}