/**
* Paints the word-wrapped text.
*
* @param g The graphics context in which to paint.
* @param a The shape (usually a rectangle) in which to paint.
*/
public void paint(Graphics g, Shape a) {
Rectangle alloc = (a instanceof Rectangle) ? (Rectangle) a : a.getBounds();
tabBase = alloc.x;
Graphics2D g2d = (Graphics2D) g;
host = (RSyntaxTextArea) getContainer();
int ascent = host.getMaxAscent();
int fontHeight = host.getLineHeight();
FoldManager fm = host.getFoldManager();
TokenPainter painter = host.getTokenPainter();
Element root = getElement();
// Whether token styles should always be painted, even in selections
int selStart = host.getSelectionStart();
int selEnd = host.getSelectionEnd();
boolean useSelectedTextColor = host.getUseSelectedTextColor();
int n = getViewCount(); // Number of lines.
int x = alloc.x + getLeftInset();
tempRect.y = alloc.y + getTopInset();
Rectangle clip = g.getClipBounds();
for (int i = 0; i < n; i++) {
tempRect.x = x + getOffset(X_AXIS, i);
// tempRect.y = y + getOffset(Y_AXIS, i);
tempRect.width = getSpan(X_AXIS, i);
tempRect.height = getSpan(Y_AXIS, i);
// System.err.println("For line " + i + ": tempRect==" + tempRect);
if (tempRect.intersects(clip)) {
Element lineElement = root.getElement(i);
int startOffset = lineElement.getStartOffset();
int endOffset = lineElement.getEndOffset() - 1; // Why always "-1"?
View view = getView(i);
if (!useSelectedTextColor
|| selStart == selEnd
|| (startOffset >= selEnd || endOffset < selStart)) {
drawView(painter, g2d, alloc, view, fontHeight, tempRect.y + ascent);
} else {
// System.out.println("Drawing line with selection: " + i);
drawViewWithSelection(
painter, g2d, alloc, view, fontHeight, tempRect.y + ascent, selStart, selEnd);
}
}
tempRect.y += tempRect.height;
Fold possibleFold = fm.getFoldForLine(i);
if (possibleFold != null && possibleFold.isCollapsed()) {
i += possibleFold.getCollapsedLineCount();
// Visible indicator of collapsed lines
Color c = RSyntaxUtilities.getFoldedLineBottomColor(host);
if (c != null) {
g.setColor(c);
g.drawLine(x, tempRect.y - 1, alloc.width, tempRect.y - 1);
}
}
}
}
/**
* Draws the passed-in text using syntax highlighting for the current language. Tokens are checked
* for being in a selected region, and are rendered appropriately if they are.
*
* @param painter The painter to render the tokens.
* @param token The list of tokens to draw.
* @param g The graphics context in which to draw.
* @param x The x-coordinate at which to draw.
* @param y The y-coordinate at which to draw.
* @param selStart The start of the selection.
* @param selEnd The end of the selection.
* @return The x-coordinate representing the end of the painted text.
*/
private float drawLineWithSelection(
TokenPainter painter, Token token, Graphics2D g, float x, float y, int selStart, int selEnd) {
float nextX = x; // The x-value at the end of our text.
boolean useSTC = host.getUseSelectedTextColor();
while (token != null && token.isPaintable() && nextX < clipEnd) {
// Selection starts in this token
if (token.containsPosition(selStart)) {
if (selStart > token.getOffset()) {
tempToken.copyFrom(token);
tempToken.textCount = selStart - tempToken.getOffset();
nextX = painter.paint(tempToken, g, nextX, y, host, this, clipStart);
tempToken.textCount = token.length();
tempToken.makeStartAt(selStart);
// Clone required since token and tempToken must be
// different tokens for else statement below
token = new TokenImpl(tempToken);
}
int tokenLen = token.length();
int selCount = Math.min(tokenLen, selEnd - token.getOffset());
if (selCount == tokenLen) {
nextX = painter.paintSelected(token, g, nextX, y, host, this, clipStart, useSTC);
} else {
tempToken.copyFrom(token);
tempToken.textCount = selCount;
nextX = painter.paintSelected(tempToken, g, nextX, y, host, this, clipStart, useSTC);
tempToken.textCount = token.length();
tempToken.makeStartAt(token.getOffset() + selCount);
token = tempToken;
nextX = painter.paint(token, g, nextX, y, host, this, clipStart);
}
}
// Selection ends in this token
else if (token.containsPosition(selEnd)) {
tempToken.copyFrom(token);
tempToken.textCount = selEnd - tempToken.getOffset();
nextX = painter.paintSelected(tempToken, g, nextX, y, host, this, clipStart, useSTC);
tempToken.textCount = token.length();
tempToken.makeStartAt(selEnd);
token = tempToken;
nextX = painter.paint(token, g, nextX, y, host, this, clipStart);
}
// This token is entirely selected
else if (token.getOffset() >= selStart && token.getEndOffset() <= selEnd) {
nextX = painter.paintSelected(token, g, nextX, y, host, this, clipStart, useSTC);
}
// This token is entirely unselected
else {
nextX = painter.paint(token, g, nextX, y, host, this, clipStart);
}
token = token.getNextToken();
}
// NOTE: We should re-use code from Token (paintBackground()) here,
// but don't because I'm just too lazy.
if (host.getEOLMarkersVisible()) {
g.setColor(host.getForegroundForTokenType(Token.WHITESPACE));
g.setFont(host.getFontForTokenType(Token.WHITESPACE));
g.drawString("\u00B6", nextX, y);
}
// Return the x-coordinate at the end of the painted text.
return nextX;
}