IndentGuidePainter.java 文件源码

private void handleDrawRequest(GC gc, int x, int y, int w, int h) {
    int startLine = fTextWidget.getLineIndex(y);
    int endLine = fTextWidget.getLineIndex(y + h - 1);
    if (startLine <= endLine && startLine < fTextWidget.getLineCount()) {
        Color fgColor = gc.getForeground();
        LineAttributes lineAttributes = gc.getLineAttributes();
        gc.setForeground(Activator.getDefault().getColor());
        gc.setLineStyle(lineStyle);
        gc.setLineWidth(lineWidth);
        spaceWidth = gc.getAdvanceWidth(' ');
        if (fIsAdvancedGraphicsPresent) {
            int alpha = gc.getAlpha();
            gc.setAlpha(this.lineAlpha);
            drawLineRange(gc, startLine, endLine, x, w);
            gc.setAlpha(alpha);
        } else {
            drawLineRange(gc, startLine, endLine, x, w);
        }
        gc.setForeground(fgColor);
        gc.setLineAttributes(lineAttributes);
    }
}