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.GetColorFor("Selection");
ColumnRange selectionRange = textArea.SelectionManager.GetSelectionAtLine(lineNumber);
HighlightColor tabMarkerColor = textArea.Document.HighlightingStrategy.GetColorFor("TabMarkers");
HighlightColor spaceMarkerColor = textArea.Document.HighlightingStrategy.GetColorFor("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;
// search the first word after startColumn and update physicalColumn if a word is Tab
int wordOffset = 0;
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)
{
// if already all words before endColumn are drawen: break
if (logicalColumn >= endColumn)
{
break;
}
ArrayList markers = Document.MarkerStrategy.GetMarkers(currentLine.Offset + wordOffset);
foreach (TextMarker marker in markers)
{
if (marker.TextMarkerType == TextMarkerType.SolidBlock)
{
// if (unselectedBackgroundBrush != null) {
// unselectedBackgroundBrush.Dispose();
// }
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.SyntaxColor != null && currentWord.SyntaxColor.HasBackground)
{
spaceBackgroundBrush = BrushRegistry.GetBrush(currentWord.SyntaxColor.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.SyntaxColor != null && currentWord.SyntaxColor.HasBackground)
{
spaceBackgroundBrush = BrushRegistry.GetBrush(currentWord.SyntaxColor.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.SyntaxColor.HasBackground)
{
wordBackgroundBrush = BrushRegistry.GetBrush(currentWord.SyntaxColor.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();
}
}
// if (bgColorBrush != null) {
// bgColorBrush.Dispose();
// bgColorBrush = null;
// }
//
// if (selectionBackgroundBrush != null) {
// selectionBackgroundBrush.Dispose();
// selectionBackgroundBrush = null;
// }
//
// if (unselectedBackgroundBrush != null) {
// unselectedBackgroundBrush.Dispose();
// unselectedBackgroundBrush = null;
// }
return(physicalXPos);
}
void PaintDocumentLine(Graphics g, int lineNumber, Rectangle lineRectangle)
{
Trace.Assert(lineNumber >= 0);
Brush bgColorBrush = GetBgColorBrush(lineNumber);
Brush backgroundBrush = textArea.Enabled ? bgColorBrush : SystemBrushes.InactiveBorder;
if (lineNumber >= textArea.Document.TotalNumberOfLines)
{
g.FillRectangle(backgroundBrush, lineRectangle);
if (TextEditorProperties.ShowInvalidLines)
{
DrawInvalidLineMarker(g, lineRectangle.Left, lineRectangle.Top);
}
if (TextEditorProperties.ShowVerticalRuler)
{
DrawVerticalRuler(g, lineRectangle);
}
// bgColorBrush.Dispose();
return;
}
float physicalXPos = lineRectangle.X;
// there can't be a folding wich starts in an above line and ends here, because the line is a new one,
// there must be a return before this line.
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.GetColorFor("Selection");
float spaceWidth = GetWidth(g, ' ');
bool selectionBeyondEOL = selectionRange.EndColumn > currentLine.Length || ColumnRange.WholeColumn.Equals(selectionRange);
if (TextEditorProperties.ShowEOLMarker)
{
HighlightColor eolMarkerColor = textArea.Document.HighlightingStrategy.GetColorFor("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);
}
// bgColorBrush.Dispose();
}
void DrawTabMarker(Graphics g, Color color, float x, float y)
{
HighlightColor tabMarkerColor = textArea.Document.HighlightingStrategy.GetColorFor("TabMarkers");
g.DrawString("\u00BB", tabMarkerColor.Font, BrushRegistry.GetBrush(color), x, y, measureStringFormat);
}
void DrawInvalidLineMarker(Graphics g, float x, float y)
{
HighlightColor invalidLinesColor = textArea.Document.HighlightingStrategy.GetColorFor("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);
}
void PaintFoldMarker(Graphics g, int lineNumber, Rectangle drawingRectangle)
{
HighlightColor foldLineColor = textArea.Document.HighlightingStrategy.GetColorFor("FoldLine");
HighlightColor selectedFoldLine = textArea.Document.HighlightingStrategy.GetColorFor("SelectedFoldLine");
ArrayList foldingsWithStart = textArea.Document.FoldingManager.GetFoldingsWithStart(lineNumber);
ArrayList foldingsBetween = textArea.Document.FoldingManager.GetFoldingsContainsLineNumber(lineNumber);
ArrayList foldingsWithEnd = textArea.Document.FoldingManager.GetFoldingsWithEnd(lineNumber);
bool isFoldStart = foldingsWithStart.Count > 0;
bool isBetween = foldingsBetween.Count > 0;
bool isFoldEnd = foldingsWithEnd.Count > 0;
bool isStartSelected = SelectedFoldingFrom(foldingsWithStart);
bool isBetweenSelected = SelectedFoldingFrom(foldingsBetween);
bool isEndSelected = SelectedFoldingFrom(foldingsWithEnd);
int foldMarkerSize = (int)Math.Round(textArea.TextView.FontHeight * 0.57f);
foldMarkerSize -= (foldMarkerSize) % 2;
int foldMarkerYPos = drawingRectangle.Y + (int)((drawingRectangle.Height - foldMarkerSize) / 2);
int xPos = drawingRectangle.X + (drawingRectangle.Width - foldMarkerSize) / 2 + foldMarkerSize / 2;
if (isFoldStart)
{
bool isVisible = true;
bool moreLinedOpenFold = false;
foreach (FoldMarker foldMarker in foldingsWithStart)
{
if (foldMarker.IsFolded)
{
isVisible = false;
}
else
{
moreLinedOpenFold = foldMarker.EndLine > foldMarker.StartLine;
}
}
bool isFoldEndFromUpperFold = false;
foreach (FoldMarker foldMarker in foldingsWithEnd)
{
if (foldMarker.EndLine > foldMarker.StartLine && !foldMarker.IsFolded)
{
isFoldEndFromUpperFold = true;
}
}
DrawFoldMarker(g, new RectangleF(drawingRectangle.X + (drawingRectangle.Width - foldMarkerSize) / 2,
foldMarkerYPos,
foldMarkerSize,
foldMarkerSize),
isVisible,
isStartSelected
);
// draw line above fold marker
if (isBetween || isFoldEndFromUpperFold)
{
g.DrawLine(BrushRegistry.GetPen(isBetweenSelected ? selectedFoldLine.Color : foldLineColor.Color),
xPos,
drawingRectangle.Top,
xPos,
foldMarkerYPos - 1);
}
// draw line below fold marker
if (isBetween || moreLinedOpenFold)
{
g.DrawLine(BrushRegistry.GetPen(isEndSelected || (isStartSelected && isVisible) || isBetweenSelected ? selectedFoldLine.Color : foldLineColor.Color),
xPos,
foldMarkerYPos + foldMarkerSize + 1,
xPos,
drawingRectangle.Bottom);
}
}
else
{
if (isFoldEnd)
{
int midy = drawingRectangle.Top + drawingRectangle.Height / 2;
// draw line above fold end marker
g.DrawLine(BrushRegistry.GetPen(isBetweenSelected || isEndSelected ? selectedFoldLine.Color : foldLineColor.Color),
xPos,
drawingRectangle.Top,
xPos,
midy);
// draw fold end marker
g.DrawLine(BrushRegistry.GetPen(isBetweenSelected || isEndSelected ? selectedFoldLine.Color : foldLineColor.Color),
xPos,
midy,
xPos + foldMarkerSize / 2,
midy);
// draw line below fold end marker
if (isBetween)
{
g.DrawLine(BrushRegistry.GetPen(isBetweenSelected ? selectedFoldLine.Color : foldLineColor.Color),
xPos,
midy + 1,
xPos,
drawingRectangle.Bottom);
}
}
else if (isBetween)
{
// just draw the line :)
g.DrawLine(BrushRegistry.GetPen(isBetweenSelected ? selectedFoldLine.Color : foldLineColor.Color),
xPos,
drawingRectangle.Top,
xPos,
drawingRectangle.Bottom);
}
}
}