Iterable<VisualFragment> getFragmentsInVisualOrder(
final float startX, final int startVisualColumn, final int startOffset, int endOffset) {
assert startOffset <= endOffset;
final BidiRun[] runs;
int startLogicalColumn = 0;
if (startOffset == endOffset) {
runs = new BidiRun[0];
} else {
List<BidiRun> runList = new ArrayList<BidiRun>();
for (BidiRun run : myBidiRunsInLogicalOrder) {
if (run.startOffset < startOffset) {
startLogicalColumn =
run.getLogicalColumn(startLogicalColumn, Math.min(startOffset, run.endOffset));
}
if (run.endOffset <= startOffset) continue;
if (run.startOffset >= endOffset) break;
runList.add(run.subRun(startOffset, endOffset));
}
runs = runList.toArray(new BidiRun[runList.size()]);
reorderRunsVisually(runs);
}
final int finalStartLogicalColumn = startLogicalColumn;
return new Iterable<VisualFragment>() {
@Override
public Iterator<VisualFragment> iterator() {
return new VisualOrderIterator(
startX, startVisualColumn, finalStartLogicalColumn, startOffset, runs);
}
};
}
boolean isRtlLocation(int offset, boolean leanForward) {
if (offset == 0 && !leanForward) return false;
for (BidiRun run : myBidiRunsInLogicalOrder) {
if (offset < run.endOffset || offset == run.endOffset && !leanForward) return run.isRtl();
}
return false;
}
private static void addFragments(
BidiRun run,
char[] text,
int start,
int end,
int fontStyle,
FontPreferences fontPreferences,
FontRenderContext fontRenderContext,
@Nullable TabFragment tabFragment) {
Font currentFont = null;
int currentIndex = start;
for (int i = start; i < end; i++) {
char c = text[i];
if (c == '\t' && tabFragment != null) {
assert run.level == 0;
addTextFragmentIfNeeded(
run, text, currentIndex, i, currentFont, fontRenderContext, run.isRtl());
run.fragments.add(tabFragment);
currentFont = null;
currentIndex = i + 1;
} else {
Font font =
ComplementaryFontsRegistry.getFontAbleToDisplay(c, fontStyle, fontPreferences)
.getFont();
if (!font.equals(currentFont)) {
addTextFragmentIfNeeded(
run, text, currentIndex, i, currentFont, fontRenderContext, run.isRtl());
currentFont = font;
currentIndex = i;
}
}
}
addTextFragmentIfNeeded(
run, text, currentIndex, end, currentFont, fontRenderContext, run.isRtl());
}
@Override
public VisualFragment next() {
if (!hasNext()) {
throw new NoSuchElementException();
}
BidiRun run = myRuns[myRunIndex];
if (myRunIndex == 0 && myFragmentIndex == 0) {
myFragment.startLogicalColumn +=
(run.isRtl() ? run.endOffset : run.startOffset) - myFragment.startOffset;
} else {
myFragment.startLogicalColumn = myFragment.getEndLogicalColumn();
if (myFragmentIndex == 0) {
myFragment.startLogicalColumn +=
(run.isRtl() ? run.endOffset : run.startOffset) - myFragment.getEndOffset();
}
myFragment.startVisualColumn = myFragment.getEndVisualColumn();
myFragment.startX = myFragment.getEndX();
}
myFragment.isRtl = run.isRtl();
myFragment.delegate =
run.fragments.get(
run.isRtl() ? run.fragments.size() - 1 - myFragmentIndex : myFragmentIndex);
myFragment.startOffset =
run.isRtl() ? run.endOffset - myOffsetInsideRun : run.startOffset + myOffsetInsideRun;
myOffsetInsideRun += myFragment.getLength();
myFragmentIndex++;
if (myFragmentIndex >= run.fragments.size()) {
myFragmentIndex = 0;
myOffsetInsideRun = 0;
myRunIndex++;
}
return myFragment;
}
