void DrawFoldMarker(Graphics g, RectangleF rectangle, bool isOpened, bool isSelected)
{
HighlightColor foldMarkerColor = textArea.Document.HighlightingStrategy.GetEnvironmentColorForName("FoldMarker");
HighlightColor foldLineColor = textArea.Document.HighlightingStrategy.GetEnvironmentColorForName("FoldLine");
HighlightColor selectedFoldLine = textArea.Document.HighlightingStrategy.GetEnvironmentColorForName("SelectedFoldLine");
Rectangle intRect = new Rectangle((int)rectangle.X, (int)rectangle.Y, (int)rectangle.Width, (int)rectangle.Height);
g.FillRectangle(BrushRegistry.GetBrush(foldMarkerColor.BackgroundColor), intRect);
g.DrawRectangle(BrushRegistry.GetPen(isSelected ? selectedFoldLine.Color : foldMarkerColor.Color), intRect);
int space = (int)Math.Round(((double)rectangle.Height) / 8d) + 1;
int mid = intRect.Height / 2 + intRect.Height % 2;
g.DrawLine(BrushRegistry.GetPen(foldLineColor.BackgroundColor),
rectangle.X + space,
rectangle.Y + mid,
rectangle.X + rectangle.Width - space,
rectangle.Y + mid);
if (!isOpened)
{
g.DrawLine(BrushRegistry.GetPen(foldLineColor.BackgroundColor),
rectangle.X + mid,
rectangle.Y + space,
rectangle.X + mid,
rectangle.Y + rectangle.Height - space);
}
}
Brush GetBgColorBrush(int lineNumber)
{
if (DrawLineMarkerAtLine(lineNumber)) //如果当前行是标记行(即要画充满整个TextArea宽度的一行)
{
HighlightColor caretLine = textArea.Document.HighlightingStrategy.GetEnvironmentColorForName("CaretMarker");
return(BrushRegistry.GetBrush(caretLine.Color));
}
HighlightColor background = (HighlightColor)textArea.Document.HighlightingStrategy.GetEnvironmentColorForName("Default");
return(BrushRegistry.GetBrush(background.BackgroundColor));
}
float DrawEOLMarker(Graphics g, Color color, Brush backBrush, float x, float y)
{
float width = GetWidth(g, '\u00B6');
g.FillRectangle(backBrush,
new RectangleF(x, y, width, fontHeight));
HighlightColor eolMarkerColor = textArea.Document.HighlightingStrategy.GetEnvironmentColorForName("EOLMarkers");
g.DrawString("\u00B6", eolMarkerColor.Font, BrushRegistry.GetBrush(color), x, y, measureStringFormat);
return(width);
}
/// <summary>
/// Get the marker brush (for solid block markers) at a given position.
/// </summary>
/// <param name="offset">The offset.</param>
/// <param name="length">The length.</param>
/// <returns>The Brush or null when no marker was found.</returns>
Brush GetMarkerBrushAt(int offset, int length)
{
ArrayList markers = Document.TextMarkerStrategy.GetMarkers(offset, length);
foreach (TextMarker marker in markers)
{
if (marker.TextMarkerType == TextMarkerType.SolidBlock)
{
return(BrushRegistry.GetBrush(marker.Color));
}
}
return(null);
}
float DrawDocumentWord(Graphics g, string word, PointF position, Font font, Color foreColor, Brush backBrush)
{
if (word == null || word.Length == 0)
{
return(0f);
}
float wordWidth = g.MeasureString(word, font, 32768, measureStringFormat).Width;
g.FillRectangle(backBrush,
new RectangleF(position.X, position.Y, (float)Math.Ceiling(wordWidth), FontHeight));
g.DrawString(word, font, BrushRegistry.GetBrush(foreColor), position.X, position.Y, measureStringFormat);
return(wordWidth);
}
public override void OnPaint(Graphics g, Rectangle rect)
{
if (rect.Width <= 0 || rect.Height <= 0)
{
return;
}
HighlightColor lineNumberPainterColor = textArea.Document.HighlightingStrategy.GetEnvironmentColorForName("LineNumbers");
HighlightColor foldLineColor = textArea.Document.HighlightingStrategy.GetEnvironmentColorForName("FoldLine");
for (int y = 0; y < (DrawingRectangle.Height + textArea.TextViewMargin.VisibleLineDrawingRemainder) / textArea.TextViewMargin.FontHeight + 1; ++y)
{
Rectangle markerRectangle = new Rectangle(DrawingRectangle.X,
DrawingRectangle.Top + y * textArea.TextViewMargin.FontHeight - textArea.TextViewMargin.VisibleLineDrawingRemainder,
DrawingRectangle.Width,
textArea.TextViewMargin.FontHeight);
if (rect.IntersectsWith(markerRectangle))
{
// draw dotted separator line
if (textArea.Document.TextEditorProperties.ShowLineNumbers)
{
g.FillRectangle(BrushRegistry.GetBrush(textArea.Enabled ? lineNumberPainterColor.BackgroundColor : SystemColors.InactiveBorder),
new Rectangle(markerRectangle.X + 1, markerRectangle.Y, markerRectangle.Width - 1, markerRectangle.Height));
g.DrawLine(BrushRegistry.GetDotPen(lineNumberPainterColor.Color, lineNumberPainterColor.BackgroundColor),
base.DrawingRectangle.X,
markerRectangle.Y,
base.DrawingRectangle.X,
markerRectangle.Bottom);
}
else
{
g.FillRectangle(BrushRegistry.GetBrush(textArea.Enabled ? lineNumberPainterColor.BackgroundColor : SystemColors.InactiveBorder), markerRectangle);
}
int currentLine = textArea.Document.GetFirstLogicalLine(textArea.Document.GetVisibleLine(textArea.TextViewMargin.FirstVisibleLine) + y);
PaintFoldMarker(g, currentLine, markerRectangle);
}
}
}
void DrawLine(Graphics g, LineSegment line, float yPos, RectangleF margin)
{
float xPos = 0;
float fontHeight = Font.GetHeight(g);
// bool gotNonWhitespace = false;
curTabIndent = 0;
foreach (TextWord word in line.Words)
{
switch (word.Type)
{
case TextWordType.Space:
Advance(ref xPos, ref yPos, margin.Width, textAreaControl.TextArea.TextViewMargin.GetWidth(' '), fontHeight);
// if (!gotNonWhitespace) {
// curTabIndent = xPos;
// }
break;
case TextWordType.Tab:
Advance(ref xPos, ref yPos, margin.Width, TabIndent * textAreaControl.TextArea.TextViewMargin.GetWidth(' '), fontHeight);
// if (!gotNonWhitespace) {
// curTabIndent = xPos;
// }
break;
case TextWordType.Word:
// if (!gotNonWhitespace) {
// gotNonWhitespace = true;
// curTabIndent += TabIndent * textAreaControl.TextArea.TextView.GetWidth(' ');
// }
g.DrawString(word.Word, word.Font, BrushRegistry.GetBrush(word.Color), xPos + margin.X, yPos);
SizeF drawingSize = g.MeasureString(word.Word, word.Font, new SizeF(margin.Width, fontHeight * 100), printingStringFormat);
Advance(ref xPos, ref yPos, margin.Width, drawingSize.Width, fontHeight);
break;
}
}
}
void DrawMarker(Graphics g, TextMarker marker, RectangleF drawingRect)
{
float drawYPos = drawingRect.Bottom - 1;
switch (marker.TextMarkerType)
{
case TextMarkerType.Underlined:
g.DrawLine(BrushRegistry.GetPen(marker.Color), drawingRect.X, drawYPos, drawingRect.Right, drawYPos);
break;
case TextMarkerType.WaveLine:
int reminder = ((int)drawingRect.X) % 6;
for (float i = drawingRect.X - reminder; i < drawingRect.Right + reminder; i += 6)
{
g.DrawLine(BrushRegistry.GetPen(marker.Color), i, drawYPos + 3 - 4, i + 3, drawYPos + 1 - 4);
g.DrawLine(BrushRegistry.GetPen(marker.Color), i + 3, drawYPos + 1 - 4, i + 6, drawYPos + 3 - 4);
}
break;
case TextMarkerType.SolidBlock:
g.FillRectangle(BrushRegistry.GetBrush(marker.Color), drawingRect);
break;
}
}
void DrawInvalidLineMarker(Graphics g, float x, float y)
{
HighlightColor invalidLinesColor = textArea.Document.HighlightingStrategy.GetEnvironmentColorForName("InvalidLines");
g.DrawString("~", invalidLinesColor.Font, BrushRegistry.GetBrush(invalidLinesColor.Color), x, y, measureStringFormat);
}
void DrawBracketHighlight(Graphics g, Rectangle rect)
{
g.FillRectangle(BrushRegistry.GetBrush(Color.FromArgb(50, 0, 0, 255)), rect);
g.DrawRectangle(Pens.Blue, rect);
}
float PaintLinePart(Graphics g, int lineNumber, int startColumn, int endColumn, Rectangle lineRectangle, float physicalXPos)
{
bool drawLineMarker = DrawLineMarkerAtLine(lineNumber);
Brush bgColorBrush = GetBgColorBrush(lineNumber);
Brush backgroundBrush = textArea.Enabled ? bgColorBrush : SystemBrushes.InactiveBorder;
HighlightColor selectionColor = textArea.Document.HighlightingStrategy.GetEnvironmentColorForName("Selection");
ColumnRange selectionRange = textArea.SelectionManager.GetSelectionAtLine(lineNumber);
HighlightColor tabMarkerColor = textArea.Document.HighlightingStrategy.GetEnvironmentColorForName("TabMarkers");
HighlightColor spaceMarkerColor = textArea.Document.HighlightingStrategy.GetEnvironmentColorForName("SpaceMarkers");
float spaceWidth = GetWidth(g, ' ');
LineSegment currentLine = textArea.Document.GetLineSegment(lineNumber);
int logicalColumn = startColumn;
Brush selectionBackgroundBrush = BrushRegistry.GetBrush(selectionColor.BackgroundColor);
Brush unselectedBackgroundBrush = backgroundBrush;
if (currentLine.Words != null)
{
int startword = 0;
int wordOffset = 0;
//首先查找第一个不是空格或Tab的单词.
for (; startword < currentLine.Words.Count; ++startword)
{
if (wordOffset >= startColumn)
{
break;
}
TextWord currentWord = ((TextWord)currentLine.Words[startword]);
if (currentWord.Type == TextWordType.Tab)
{
++wordOffset;
}
else if (currentWord.Type == TextWordType.Space)
{
++wordOffset;
}
else
{
wordOffset += currentWord.Length;
}
}
for (int i = startword; i < currentLine.Words.Count; ++i)
{
// 到行的末尾(即全部的单词都画完了),则退出for语句.
if (logicalColumn >= endColumn)
{
break;
}
ArrayList markers = Document.TextMarkerStrategy.GetMarkers(currentLine.Offset + wordOffset);
foreach (TextMarker marker in markers)
{
if (marker.TextMarkerType == TextMarkerType.SolidBlock)
{
unselectedBackgroundBrush = BrushRegistry.GetBrush(marker.Color);
break;
}
}
// Clear old marker arrary
// TODO: cut the word if startColumn or endColimn is in the word;
// needed for foldings wich can start or end in the middle of a word
TextWord currentWord = ((TextWord)currentLine.Words[i]);
switch (currentWord.Type)
{
case TextWordType.Space:
RectangleF spaceRectangle = new RectangleF(physicalXPos, lineRectangle.Y, (float)Math.Ceiling(spaceWidth), lineRectangle.Height);
Brush spaceBackgroundBrush;
if (ColumnRange.WholeColumn.Equals(selectionRange) || logicalColumn >= selectionRange.StartColumn && logicalColumn < selectionRange.EndColumn)
{
spaceBackgroundBrush = selectionBackgroundBrush;
}
else
{
Brush markerBrush = GetMarkerBrushAt(currentLine.Offset + logicalColumn, 1);
if (!drawLineMarker && markerBrush != null)
{
spaceBackgroundBrush = markerBrush;
}
else if (!drawLineMarker && currentWord.HighlightColor != null && currentWord.HighlightColor.HasBackground)
{
spaceBackgroundBrush = BrushRegistry.GetBrush(currentWord.HighlightColor.BackgroundColor);
}
else
{
spaceBackgroundBrush = unselectedBackgroundBrush;
}
}
g.FillRectangle(spaceBackgroundBrush, spaceRectangle);
if (TextEditorProperties.ShowSpaces)
{
DrawSpaceMarker(g, spaceMarkerColor.Color, physicalXPos, lineRectangle.Y);
}
foreach (TextMarker marker in markers)
{
DrawMarker(g, marker, spaceRectangle);
}
physicalXPos += spaceWidth;
++logicalColumn;
++physicalColumn;
break;
case TextWordType.Tab:
int oldPhysicalColumn = physicalColumn;
physicalColumn += TextEditorProperties.TabIndent;
physicalColumn = (physicalColumn / TextEditorProperties.TabIndent) * TextEditorProperties.TabIndent;
float tabWidth = (physicalColumn - oldPhysicalColumn) * spaceWidth;
RectangleF tabRectangle = new RectangleF(physicalXPos, lineRectangle.Y, (float)Math.Ceiling(tabWidth), lineRectangle.Height);
if (ColumnRange.WholeColumn.Equals(selectionRange) || logicalColumn >= selectionRange.StartColumn && logicalColumn <= selectionRange.EndColumn - 1)
{
spaceBackgroundBrush = selectionBackgroundBrush;
}
else
{
Brush markerBrush = GetMarkerBrushAt(currentLine.Offset + logicalColumn, 1);
if (!drawLineMarker && markerBrush != null)
{
spaceBackgroundBrush = markerBrush;
}
else if (!drawLineMarker && currentWord.HighlightColor != null && currentWord.HighlightColor.HasBackground)
{
spaceBackgroundBrush = BrushRegistry.GetBrush(currentWord.HighlightColor.BackgroundColor);
}
else
{
spaceBackgroundBrush = unselectedBackgroundBrush;
}
}
g.FillRectangle(spaceBackgroundBrush, tabRectangle);
if (TextEditorProperties.ShowTabs)
{
DrawTabMarker(g, tabMarkerColor.Color, physicalXPos, lineRectangle.Y);
}
foreach (TextMarker marker in markers)
{
DrawMarker(g, marker, tabRectangle);
}
physicalXPos += tabWidth;
++logicalColumn;
break;
case TextWordType.Word:
string word = currentWord.Word;
float lastPos = physicalXPos;
Brush bgMarkerBrush = GetMarkerBrushAt(currentLine.Offset + logicalColumn, word.Length);
Brush wordBackgroundBrush;
if (!drawLineMarker && bgMarkerBrush != null)
{
wordBackgroundBrush = bgMarkerBrush;
}
else if (!drawLineMarker && currentWord.HighlightColor.HasBackground)
{
wordBackgroundBrush = BrushRegistry.GetBrush(currentWord.HighlightColor.BackgroundColor);
}
else
{
wordBackgroundBrush = unselectedBackgroundBrush;
}
if (ColumnRange.WholeColumn.Equals(selectionRange) || selectionRange.EndColumn - 1 >= word.Length + logicalColumn &&
selectionRange.StartColumn <= logicalColumn)
{
physicalXPos += DrawDocumentWord(g,
word,
new PointF(physicalXPos, lineRectangle.Y),
currentWord.Font,
selectionColor.HasForgeground ? selectionColor.Color : currentWord.Color,
selectionBackgroundBrush);
}
else
{
if (ColumnRange.NoColumn.Equals(selectionRange) /* || selectionRange.StartColumn > logicalColumn + word.Length || selectionRange.EndColumn - 1 <= logicalColumn */)
{
physicalXPos += DrawDocumentWord(g,
word,
new PointF(physicalXPos, lineRectangle.Y),
currentWord.Font,
currentWord.Color,
wordBackgroundBrush);
}
else
{
int offset1 = Math.Min(word.Length, Math.Max(0, selectionRange.StartColumn - logicalColumn));
int offset2 = Math.Max(offset1, Math.Min(word.Length, selectionRange.EndColumn - logicalColumn));
physicalXPos += DrawDocumentWord(g,
word.Substring(0, offset1),
new PointF(physicalXPos, lineRectangle.Y),
currentWord.Font,
currentWord.Color,
wordBackgroundBrush);
physicalXPos += DrawDocumentWord(g,
word.Substring(offset1, offset2 - offset1),
new PointF(physicalXPos, lineRectangle.Y),
currentWord.Font,
selectionColor.HasForgeground ? selectionColor.Color : currentWord.Color,
selectionBackgroundBrush);
physicalXPos += DrawDocumentWord(g,
word.Substring(offset2),
new PointF(physicalXPos, lineRectangle.Y),
currentWord.Font,
currentWord.Color,
wordBackgroundBrush);
}
}
// if (markerBrush != null) {
// markerBrush.Dispose();
// }
foreach (TextMarker marker in markers)
{
if (marker.TextMarkerType != TextMarkerType.SolidBlock)
{
DrawMarker(g, marker, new RectangleF(lastPos, lineRectangle.Y, (physicalXPos - lastPos), lineRectangle.Height));
}
}
// draw bracket highlight
if (highlight != null)
{
if (highlight.OpenBrace.Y == lineNumber && highlight.OpenBrace.X == logicalColumn ||
highlight.CloseBrace.Y == lineNumber && highlight.CloseBrace.X == logicalColumn)
{
DrawBracketHighlight(g, new Rectangle((int)lastPos, lineRectangle.Y, (int)(physicalXPos - lastPos) - 1, lineRectangle.Height - 1));
}
}
physicalColumn += word.Length;
logicalColumn += word.Length;
break;
}
markers.Clear();
} //for
} //if
return(physicalXPos);
}
void PaintDocumentLine(Graphics g, int lineNumber, Rectangle lineRectangle)
{
Brush bgColorBrush = GetBgColorBrush(lineNumber);
Brush backgroundBrush = textArea.Enabled ? bgColorBrush : SystemBrushes.InactiveBorder;
if (lineNumber >= textArea.Document.TotalNumberOfLines)
{
g.FillRectangle(backgroundBrush, lineRectangle);
if (TextEditorProperties.ShowInvalidLines) //判断是否要画无效的行。
{
DrawInvalidLineMarker(g, lineRectangle.Left, lineRectangle.Top);
}
if (TextEditorProperties.ShowVerticalRuler) //判断是否要画垂直标尺。
{
DrawVerticalRuler(g, lineRectangle);
}
return;
}
float physicalXPos = lineRectangle.X;
int column = 0;
physicalColumn = 0;
if (TextEditorProperties.EnableFolding)
{
while (true)
{
ArrayList starts = textArea.Document.FoldingManager.GetFoldedFoldingsWithStartAfterColumn(lineNumber, column - 1);
if (starts == null || starts.Count <= 0)
{
if (lineNumber < textArea.Document.TotalNumberOfLines)
{
physicalXPos = PaintLinePart(g, lineNumber, column, textArea.Document.GetLineSegment(lineNumber).Length, lineRectangle, physicalXPos);
}
break;
}
// search the first starting folding
FoldMarker firstFolding = (FoldMarker)starts[0];
foreach (FoldMarker fm in starts)
{
if (fm.StartColumn < firstFolding.StartColumn)
{
firstFolding = fm;
}
}
starts.Clear();
physicalXPos = PaintLinePart(g, lineNumber, column, firstFolding.StartColumn, lineRectangle, physicalXPos);
column = firstFolding.EndColumn;
lineNumber = firstFolding.EndLine;
ColumnRange selectionRange2 = textArea.SelectionManager.GetSelectionAtLine(lineNumber);
bool drawSelected = ColumnRange.WholeColumn.Equals(selectionRange2) || firstFolding.StartColumn >= selectionRange2.StartColumn && firstFolding.EndColumn <= selectionRange2.EndColumn;
physicalXPos = PaintFoldingText(g, lineNumber, physicalXPos, lineRectangle, firstFolding.FoldText, drawSelected);
}
}
else
{
physicalXPos = PaintLinePart(g, lineNumber, 0, textArea.Document.GetLineSegment(lineNumber).Length, lineRectangle, physicalXPos);
}
if (lineNumber < textArea.Document.TotalNumberOfLines)
{
// Paint things after end of line
ColumnRange selectionRange = textArea.SelectionManager.GetSelectionAtLine(lineNumber);
LineSegment currentLine = textArea.Document.GetLineSegment(lineNumber);
HighlightColor selectionColor = textArea.Document.HighlightingStrategy.GetEnvironmentColorForName("Selection");
float spaceWidth = GetWidth(g, ' ');
bool selectionBeyondEOL = selectionRange.EndColumn > currentLine.Length || ColumnRange.WholeColumn.Equals(selectionRange);
if (TextEditorProperties.ShowEOLMarker)
{
HighlightColor eolMarkerColor = textArea.Document.HighlightingStrategy.GetEnvironmentColorForName("EOLMarkers");
physicalXPos += DrawEOLMarker(g, eolMarkerColor.Color, selectionBeyondEOL ? bgColorBrush : backgroundBrush, physicalXPos, lineRectangle.Y);
}
else
{
if (selectionBeyondEOL)
{
g.FillRectangle(BrushRegistry.GetBrush(selectionColor.BackgroundColor), new RectangleF(physicalXPos, lineRectangle.Y, spaceWidth, lineRectangle.Height));
physicalXPos += spaceWidth;
}
}
Brush fillBrush = selectionBeyondEOL && TextEditorProperties.AllowCaretBeyondEOL ? bgColorBrush : backgroundBrush;
g.FillRectangle(fillBrush,
new RectangleF(physicalXPos, lineRectangle.Y, lineRectangle.Width - physicalXPos + lineRectangle.X, lineRectangle.Height));
}
if (TextEditorProperties.ShowVerticalRuler)
{
DrawVerticalRuler(g, lineRectangle);
}
}
void DrawTabMarker(Graphics g, Color color, float x, float y)
{
HighlightColor tabMarkerColor = textArea.Document.HighlightingStrategy.GetEnvironmentColorForName("TabMarkers");
g.DrawString("\u00BB", tabMarkerColor.Font, BrushRegistry.GetBrush(color), x, y, measureStringFormat);
}
