protected LangSourceViewer getEditorSourceViewer() throws CommonException {
if (editor instanceof AbstractLangEditor) {
AbstractLangEditor langEditor = (AbstractLangEditor) editor;
return langEditor.getSourceViewer_();
} else {
throw new CommonException("Possible internal error: SourceViewer not available.");
}
}
public void gotoMatchingBracket() {
ITextViewer sourceViewer = langEditor.getSourceViewer_();
IDocument document = sourceViewer.getDocument();
if (document == null) return;
IRegion selection = EditorUtils.getSignedSelection(sourceViewer);
if (fPreviousSelections == null) initializePreviousSelectionList();
IRegion region =
getBracketMatcher().match(document, selection.getOffset(), selection.getLength());
if (region == null) {
region =
getBracketMatcher()
.findEnclosingPeerCharacters(document, selection.getOffset(), selection.getLength());
initializePreviousSelectionList();
fPreviousSelections.add(selection);
} else {
if (fPreviousSelections.size() == 2) {
if (!selection.equals(fPreviousSelections.get(1))) {
initializePreviousSelectionList();
}
} else if (fPreviousSelections.size() == 3) {
if (selection.equals(fPreviousSelections.get(2))
&& !selection.equals(fPreviousSelections.get(0))) {
IRegion originalSelection = fPreviousSelections.get(0);
sourceViewer.setSelectedRange(
originalSelection.getOffset(), originalSelection.getLength());
sourceViewer.revealRange(originalSelection.getOffset(), originalSelection.getLength());
initializePreviousSelectionList();
return;
}
initializePreviousSelectionList();
}
}
if (region == null) {
langEditor.setStatusLineErrorMessage(
LangEditorMessages.GotoMatchingBracket_error_noMatchingBracket);
sourceViewer.getTextWidget().getDisplay().beep();
return;
}
int offset = region.getOffset();
int length = region.getLength();
if (length < 1) return;
int anchor = getBracketMatcher().getAnchor();
// http://dev.eclipse.org/bugs/show_bug.cgi?id=34195
int targetOffset = (ICharacterPairMatcher.RIGHT == anchor) ? offset + 1 : offset + length - 1;
boolean visible = false;
if (sourceViewer instanceof ITextViewerExtension5) {
ITextViewerExtension5 extension = (ITextViewerExtension5) sourceViewer;
visible = (extension.modelOffset2WidgetOffset(targetOffset) > -1);
} else {
IRegion visibleRegion = sourceViewer.getVisibleRegion();
// http://dev.eclipse.org/bugs/show_bug.cgi?id=34195
visible =
(targetOffset >= visibleRegion.getOffset()
&& targetOffset <= visibleRegion.getOffset() + visibleRegion.getLength());
}
if (!visible) {
langEditor.setStatusLineErrorMessage(
LangEditorMessages.GotoMatchingBracket_error_bracketOutsideSelectedElement);
sourceViewer.getTextWidget().getDisplay().beep();
return;
}
int adjustment =
getBracketMatcher()
.getOffsetAdjustment(
document, selection.getOffset() + selection.getLength(), selection.getLength());
targetOffset += adjustment;
int direction = (selection.getLength() == 0) ? 0 : ((selection.getLength() > 0) ? 1 : -1);
if (fPreviousSelections.size() == 1 && direction < 0) {
targetOffset++;
}
if (fPreviousSelections.size() > 0) {
fPreviousSelections.add(new Region(targetOffset, direction));
}
sourceViewer.setSelectedRange(targetOffset, direction);
sourceViewer.revealRange(targetOffset, direction);
}
protected LangPairMatcher getBracketMatcher() {
return langEditor.getBracketMatcher();
}