/**
* Returns the location of the caret as offset in the source viewer's input document.
*
* @return the caret location
*/
private int getModelCaret() {
int widgetCaret = fViewer.getTextWidget().getCaretOffset();
if (fViewer instanceof ITextViewerExtension5) {
ITextViewerExtension5 extension = (ITextViewerExtension5) fViewer;
return extension.widgetOffset2ModelOffset(widgetCaret);
}
IRegion visible = fViewer.getVisibleRegion();
return widgetCaret + visible.getOffset();
}
private IRegion modelRange2WidgetRange(IRegion region) {
ISourceViewer viewer = fEditor.getViewer();
if (viewer instanceof ITextViewerExtension5) {
ITextViewerExtension5 extension = (ITextViewerExtension5) viewer;
return extension.modelRange2WidgetRange(region);
}
IRegion visibleRegion = viewer.getVisibleRegion();
int start = region.getOffset() - visibleRegion.getOffset();
int end = start + region.getLength();
if (end > visibleRegion.getLength()) end = visibleRegion.getLength();
return new Region(start, end - start);
}
/**
* Internal draw request handler.
*
* @param gc Graphics context to update.
*/
private final void handleDrawRequest(final GC gc) {
if (mBracketPosition.isDeleted) {
return;
}
int length = mBracketPosition.getLength();
if (length < 1) {
return;
}
int offset = mBracketPosition.getOffset();
IRegion region = mSourceViewer.getVisibleRegion();
if (region.getOffset() <= offset
&& region.getOffset() + region.getLength() >= offset + length) {
offset -= region.getOffset();
draw(gc, offset, 1);
}
}
private Rectangle getLineRectangle(Position position) {
if (position == null) {
return null;
}
// if the position that is about to be drawn was deleted then we can't
if (position.isDeleted()) {
return null;
}
int widgetOffset = 0;
if (fViewer instanceof ITextViewerExtension5) {
ITextViewerExtension5 extension = (ITextViewerExtension5) fViewer;
widgetOffset = extension.modelOffset2WidgetOffset(position.getOffset());
if (widgetOffset == -1) {
return null;
}
} else {
IRegion visible = fViewer.getVisibleRegion();
widgetOffset = position.getOffset() - visible.getOffset();
if (widgetOffset < 0 || visible.getLength() < widgetOffset) {
return null;
}
}
StyledText textWidget = fViewer.getTextWidget();
// check for https://bugs.eclipse.org/bugs/show_bug.cgi?id=64898
// this is a guard against the symptoms but not the actual solution
if (0 <= widgetOffset && widgetOffset <= textWidget.getCharCount()) {
Point upperLeft = textWidget.getLocationAtOffset(widgetOffset);
int width = textWidget.getClientArea().width + textWidget.getHorizontalPixel();
int height = textWidget.getLineHeight(widgetOffset);
return new Rectangle(0, upperLeft.y, width, height);
}
return null;
}