protected void paintCaret(Graphics gfx, int line, int y) {
// System.out.println("painting caret " + line + " " + y);
if (textArea.isCaretVisible()) {
// System.out.println("caret is visible");
int offset = textArea.getCaretPosition() - textArea.getLineStartOffset(line);
int caretX = textArea._offsetToX(line, offset);
int caretWidth = ((blockCaret || textArea.isOverwriteEnabled()) ? fm.charWidth('w') : 1);
y += fm.getLeading() + fm.getMaxDescent();
int height = fm.getHeight();
// System.out.println("caretX, width = " + caretX + " " + caretWidth);
gfx.setColor(caretColor);
if (textArea.isOverwriteEnabled()) {
gfx.fillRect(caretX, y + height - 1, caretWidth, 1);
} else {
// some machines don't like the drawRect for the single
// pixel caret.. this caused a lot of hell because on that
// minority of machines, the caret wouldn't show up past
// the first column. the fix is to use drawLine() in
// those cases, as a workaround.
if (caretWidth == 1) {
gfx.drawLine(caretX, y, caretX, y + height - 1);
} else {
gfx.drawRect(caretX, y, caretWidth - 1, height - 1);
}
// gfx.drawRect(caretX, y, caretWidth, height - 1);
}
}
}
protected void paintSyntaxLine(
Graphics gfx,
TokenMarker tokenMarker,
int line,
Font defaultFont,
Color defaultColor,
int x,
int y) {
textArea.getLineText(currentLineIndex, currentLine);
currentLineTokens = tokenMarker.markTokens(currentLine, currentLineIndex);
paintHighlight(gfx, line, y);
gfx.setFont(defaultFont);
gfx.setColor(defaultColor);
y += fm.getHeight();
x = SyntaxUtilities.paintSyntaxLine(currentLine, currentLineTokens, styles, this, gfx, x, y);
/*
* Draw characters via input method.
*/
if (compositionTextPainter != null && compositionTextPainter.hasComposedTextLayout()) {
compositionTextPainter.draw(gfx, lineHighlightColor);
}
if (eolMarkers) {
gfx.setColor(eolMarkerColor);
gfx.drawString(".", x, y);
}
}
public ColorPane() {
super();
Font font = new Font("Monospaced", Font.PLAIN, 12);
FontMetrics fm = getFontMetrics(font);
lineHeight = fm.getHeight();
setFont(font);
setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
}
protected void paintLineHighlight(Graphics gfx, int line, int y) {
int height = fm.getHeight();
y += fm.getLeading() + fm.getMaxDescent();
int selectionStart = textArea.getSelectionStart();
int selectionEnd = textArea.getSelectionStop();
if (selectionStart == selectionEnd) {
if (lineHighlight) {
gfx.setColor(lineHighlightColor);
gfx.fillRect(0, y, getWidth(), height);
}
} else {
gfx.setColor(selectionColor);
int selectionStartLine = textArea.getSelectionStartLine();
int selectionEndLine = textArea.getSelectionStopLine();
int lineStart = textArea.getLineStartOffset(line);
int x1, x2;
if (textArea.isSelectionRectangular()) {
int lineLen = textArea.getLineLength(line);
x1 =
textArea._offsetToX(
line,
Math.min(
lineLen, selectionStart - textArea.getLineStartOffset(selectionStartLine)));
x2 =
textArea._offsetToX(
line,
Math.min(lineLen, selectionEnd - textArea.getLineStartOffset(selectionEndLine)));
if (x1 == x2) x2++;
} else if (selectionStartLine == selectionEndLine) {
x1 = textArea._offsetToX(line, selectionStart - lineStart);
x2 = textArea._offsetToX(line, selectionEnd - lineStart);
} else if (line == selectionStartLine) {
x1 = textArea._offsetToX(line, selectionStart - lineStart);
x2 = getWidth();
} else if (line == selectionEndLine) {
// x1 = 0;
// hack from stendahl to avoid doing weird side selection thing
x1 = textArea._offsetToX(line, 0);
// attempt at getting the gutter too, but doesn't seem to work
// x1 = textArea._offsetToX(line, -textArea.getHorizontalOffset());
x2 = textArea._offsetToX(line, selectionEnd - lineStart);
} else {
// x1 = 0;
// hack from stendahl to avoid doing weird side selection thing
x1 = textArea._offsetToX(line, 0);
// attempt at getting the gutter too, but doesn't seem to work
// x1 = textArea._offsetToX(line, -textArea.getHorizontalOffset());
x2 = getWidth();
}
// "inlined" min/max()
gfx.fillRect(x1 > x2 ? x2 : x1, y, x1 > x2 ? (x1 - x2) : (x2 - x1), height);
}
}
protected void paintBracketHighlight(Graphics gfx, int line, int y) {
int position = textArea.getBracketPosition();
if (position == -1) return;
y += fm.getLeading() + fm.getMaxDescent();
int x = textArea._offsetToX(line, position);
gfx.setColor(bracketHighlightColor);
// Hack!!! Since there is no fast way to get the character
// from the bracket matching routine, we use ( since all
// brackets probably have the same width anyway
gfx.drawRect(x, y, fm.charWidth('(') - 1, fm.getHeight() - 1);
}
protected void paintLineHighlight(Graphics gfx, int line, int y) {
int height = fm.getHeight();
y += fm.getLeading() + fm.getMaxDescent();
int selectionStart = textArea.getSelectionStart();
int selectionEnd = textArea.getSelectionEnd();
if (selectionStart == selectionEnd) {
if (lineHighlight) {
gfx.setColor(lineHighlightColor);
gfx.fillRect(0, y, getWidth(), height);
}
} else {
gfx.setColor(selectionColor);
int selectionStartLine = textArea.getSelectionStartLine();
int selectionEndLine = textArea.getSelectionEndLine();
int lineStart = textArea.getLineStartOffset(line);
int x1, x2;
if (textArea.isSelectionRectangular()) {
int lineLen = textArea.getLineLength(line);
x1 =
textArea._offsetToX(
line,
Math.min(
lineLen, selectionStart - textArea.getLineStartOffset(selectionStartLine)));
x2 =
textArea._offsetToX(
line,
Math.min(lineLen, selectionEnd - textArea.getLineStartOffset(selectionEndLine)));
if (x1 == x2) x2++;
} else if (selectionStartLine == selectionEndLine) {
x1 = textArea._offsetToX(line, selectionStart - lineStart);
x2 = textArea._offsetToX(line, selectionEnd - lineStart);
} else if (line == selectionStartLine) {
x1 = textArea._offsetToX(line, selectionStart - lineStart);
x2 = getWidth();
} else if (line == selectionEndLine) {
x1 = 0;
x2 = textArea._offsetToX(line, selectionEnd - lineStart);
} else {
x1 = 0;
x2 = getWidth();
}
// "inlined" min/max()
gfx.fillRect(x1 > x2 ? x2 : x1, y, x1 > x2 ? (x1 - x2) : (x2 - x1), height);
}
}
protected void paintPlainLine(
Graphics gfx, int line, Font defaultFont, Color defaultColor, int x, int y) {
paintHighlight(gfx, line, y);
textArea.getLineText(line, currentLine);
gfx.setFont(defaultFont);
gfx.setColor(defaultColor);
y += fm.getHeight();
x = Utilities.drawTabbedText(currentLine, x, y, gfx, this, 0);
if (eolMarkers) {
gfx.setColor(eolMarkerColor);
gfx.drawString(".", x, y);
}
}
protected void paintCaret(Graphics gfx, int line, int y) {
if (textArea.isCaretVisible()) {
int offset = textArea.getCaretPosition() - textArea.getLineStartOffset(line);
int caretX = textArea._offsetToX(line, offset);
int caretWidth = ((blockCaret || textArea.isOverwriteEnabled()) ? fm.charWidth('w') : 1);
y += fm.getLeading() + fm.getMaxDescent();
int height = fm.getHeight();
gfx.setColor(caretColor);
if (textArea.isOverwriteEnabled()) {
gfx.fillRect(caretX, y + height - 1, caretWidth, 1);
} else {
gfx.drawRect(caretX, y, caretWidth - 1, height - 1);
}
}
}
/*
* Determine the Y offset for the current row
*/
private int getOffsetY(int rowStartOffset, FontMetrics fontMetrics) throws BadLocationException {
// Get the bounding rectangle of the row
Rectangle r = component.modelToView(rowStartOffset);
int lineHeight = fontMetrics.getHeight();
int y = r.y + r.height;
int descent = 0;
// The text needs to be positioned above the bottom of the bounding
// rectangle based on the descent of the font(s) contained on the row.
if (r.height == lineHeight) {
// default font is being used
descent = fontMetrics.getDescent();
} else {
// We need to check all the attributes for font changes
if (fonts == null) {
fonts = new HashMap<String, FontMetrics>();
}
Element root = component.getDocument().getDefaultRootElement();
int index = root.getElementIndex(rowStartOffset);
Element line = root.getElement(index);
for (int i = 0; i < line.getElementCount(); i++) {
Element child = line.getElement(i);
AttributeSet as = child.getAttributes();
String fontFamily = (String) as.getAttribute(StyleConstants.FontFamily);
Integer fontSize = (Integer) as.getAttribute(StyleConstants.FontSize);
String key = fontFamily + fontSize;
FontMetrics fm = fonts.get(key);
if (fm == null) {
Font font = new Font(fontFamily, Font.PLAIN, fontSize);
fm = component.getFontMetrics(font);
fonts.put(key, fm);
}
descent = Math.max(descent, fm.getDescent());
}
}
return y - descent;
}
protected void paintLine(Graphics gfx, TokenMarker tokenMarker, int line, int x) {
Font defaultFont = getFont();
Color defaultColor = getForeground();
currentLineIndex = line;
int y = textArea.lineToY(line);
if (line < 0 || line >= textArea.getLineCount()) {
if (paintInvalid) {
paintHighlight(gfx, line, y);
styles[Token.INVALID].setGraphicsFlags(gfx, defaultFont);
gfx.drawString("~", 0, y + fm.getHeight());
}
} else if (tokenMarker == null) {
paintPlainLine(gfx, line, defaultFont, defaultColor, x, y);
} else {
paintSyntaxLine(gfx, tokenMarker, line, defaultFont, defaultColor, x, y);
}
}
protected void paintPlainLine(
Graphics gfx, int line, Font defaultFont, Color defaultColor, int x, int y) {
paintHighlight(gfx, line, y);
textArea.getLineText(line, currentLine);
gfx.setFont(defaultFont);
gfx.setColor(defaultColor);
y += fm.getHeight();
x = Utilities.drawTabbedText(currentLine, x, y, gfx, this, 0);
// Draw characters via input method.
if (compositionTextPainter != null && compositionTextPainter.hasComposedTextLayout()) {
compositionTextPainter.draw(gfx, lineHighlightColor);
}
if (eolMarkers) {
gfx.setColor(eolMarkerColor);
gfx.drawString(".", x, y);
}
}
protected void paintSyntaxLine(
Graphics gfx,
TokenMarker tokenMarker,
int line,
Font defaultFont,
Color defaultColor,
int x,
int y) {
textArea.getLineText(currentLineIndex, currentLine);
currentLineTokens = tokenMarker.markTokens(currentLine, currentLineIndex);
paintHighlight(gfx, line, y);
gfx.setFont(defaultFont);
gfx.setColor(defaultColor);
y += fm.getHeight();
x = SyntaxUtilities.paintSyntaxLine(currentLine, currentLineTokens, styles, this, gfx, x, y);
if (eolMarkers) {
gfx.setColor(eolMarkerColor);
gfx.drawString(".", x, y);
}
}
/**
* Converts a y co-ordinate to a line index.
*
* @param y The y co-ordinate
*/
public int yToLine(int y) {
FontMetrics fm = painter.getFontMetrics();
int height = fm.getHeight();
return Math.max(0, Math.min(getLineCount() - 1, y / height + firstLine));
}
/**
* Converts a line index to a y co-ordinate.
*
* @param line The line
*/
public int lineToY(int line) {
FontMetrics fm = painter.getFontMetrics();
return (line - firstLine) * fm.getHeight() - (fm.getLeading() + fm.getMaxDescent());
}
private int getFontHeight() {
return fmRef.getHeight();
}