/**
* Converts an offset in a line into an x co-ordinate. This is a fast version that should only be
* used if no changes were made to the text since the last repaint.
*
* @param line The line
* @param offset The offset, from the start of the line
*/
public int _offsetToX(int line, int offset) {
TokenMarker tokenMarker = getTokenMarker();
/* Use painter's cached info for speed */
FontMetrics fm = painter.getFontMetrics();
getLineText(line, lineSegment);
int segmentOffset = lineSegment.offset;
int x = horizontalOffset;
/* If syntax coloring is disabled, do simple translation */
if (tokenMarker == null) {
lineSegment.count = offset;
return x + Utilities.getTabbedTextWidth(lineSegment, fm, x, painter, 0);
}
/* If syntax coloring is enabled, we have to do this because
* tokens can vary in width */
else {
Token tokens;
if (painter.currentLineIndex == line && painter.currentLineTokens != null)
tokens = painter.currentLineTokens;
else {
painter.currentLineIndex = line;
tokens = painter.currentLineTokens = tokenMarker.markTokens(lineSegment, line);
}
Toolkit toolkit = painter.getToolkit();
Font defaultFont = painter.getFont();
SyntaxStyle[] styles = painter.getStyles();
for (; ; ) {
byte id = tokens.id;
if (id == Token.END) {
return x;
}
if (id == Token.NULL) fm = painter.getFontMetrics();
else fm = styles[id].getFontMetrics(defaultFont);
int length = tokens.length;
if (offset + segmentOffset < lineSegment.offset + length) {
lineSegment.count = offset - (lineSegment.offset - segmentOffset);
return x + Utilities.getTabbedTextWidth(lineSegment, fm, x, painter, 0);
} else {
lineSegment.count = length;
x += Utilities.getTabbedTextWidth(lineSegment, fm, x, painter, 0);
lineSegment.offset += length;
}
tokens = tokens.next;
}
}
}
/**
* Determines the preferred span for this view along an axis.
*
* @param axis may be either View.X_AXIS or View.Y_AXIS
* @return the span the view would like to be rendered into >= 0. Typically the view is told to
* render into the span that is returned, although there is no guarantee. The parent may
* choose to resize or break the view.
*/
public float getPreferredSpan(int axis) {
switch (axis) {
case View.X_AXIS:
Segment buff = SegmentCache.getSharedSegment();
Document doc = getDocument();
int width;
try {
FontMetrics fm = getFontMetrics();
doc.getText(0, doc.getLength(), buff);
width = Utilities.getTabbedTextWidth(buff, fm, 0, this, 0);
if (buff.count > 0) {
Component c = getContainer();
firstLineOffset =
sun.swing.SwingUtilities2.getLeftSideBearing(
(c instanceof JComponent) ? (JComponent) c : null, fm, buff.array[buff.offset]);
firstLineOffset = Math.max(0, -firstLineOffset);
} else {
firstLineOffset = 0;
}
} catch (BadLocationException bl) {
width = 0;
}
SegmentCache.releaseSharedSegment(buff);
return width + firstLineOffset;
default:
return super.getPreferredSpan(axis);
}
}