private static void beginCompoundChange(ITextViewer viewer) {
if (viewer instanceof ITextViewerExtension) {
ITextViewerExtension extension = (ITextViewerExtension) viewer;
IRewriteTarget target = extension.getRewriteTarget();
target.beginCompoundChange();
}
}
private static void applyProposal(
ICompletionProposal proposal,
ITextViewer viewer,
char trigger,
int stateMask,
final int offset) {
Assert.isTrue(proposal instanceof ICompletionProposalExtension2);
IRewriteTarget target = null;
IEditingSupportRegistry registry = null;
IEditingSupport helper =
new IEditingSupport() {
public boolean isOriginator(DocumentEvent event, IRegion focus) {
return focus.getOffset() <= offset && focus.getOffset() + focus.getLength() >= offset;
}
public boolean ownsFocusShell() {
return false;
}
};
try {
IDocument document = viewer.getDocument();
if (viewer instanceof ITextViewerExtension) {
ITextViewerExtension extension = (ITextViewerExtension) viewer;
target = extension.getRewriteTarget();
}
if (target != null) target.beginCompoundChange();
if (viewer instanceof IEditingSupportRegistry) {
registry = (IEditingSupportRegistry) viewer;
registry.register(helper);
}
((ICompletionProposalExtension2) proposal).apply(viewer, trigger, stateMask, offset);
Point selection = proposal.getSelection(document);
if (selection != null) {
viewer.setSelectedRange(selection.x, selection.y);
viewer.revealRange(selection.x, selection.y);
}
} finally {
if (target != null) target.endCompoundChange();
if (registry != null) registry.unregister(helper);
}
}
@Override
public void dispose() {
colorManager.dispose();
ISourceViewer sourceViewer = getSourceViewer();
if (sourceViewer instanceof ITextViewerExtension) {
((ITextViewerExtension) sourceViewer).removeVerifyKeyListener(bracketInserter);
}
super.dispose();
}
@Override
public void createPartControl(Composite parent) {
setSourceViewerConfiguration(new Configuration(colorManager, this, getPreferenceStore()));
super.createPartControl(parent);
ISourceViewer sourceViewer = getSourceViewer();
if (sourceViewer instanceof ITextViewerExtension) {
bracketInserter.setSourceViewer(sourceViewer);
bracketInserter.addBrackets('{', '}');
((ITextViewerExtension) sourceViewer).prependVerifyKeyListener(bracketInserter);
}
}
/** @see AbstractTextEditor#createPartControl(Composite) */
@Override
public void createPartControl(Composite parent) {
super.createPartControl(parent);
IPreferenceStore preferenceStore = getPreferenceStore();
boolean closeBrackets = preferenceStore.getBoolean(PreferenceConstants.EDITOR_CLOSE_BRACKETS);
boolean closeStrings = preferenceStore.getBoolean(PreferenceConstants.EDITOR_CLOSE_STRINGS);
this.fBracketInserter.setCloseBracketsEnabled(closeBrackets);
this.fBracketInserter.setCloseStringsEnabled(closeStrings);
ISourceViewer sourceViewer = getSourceViewer();
if (sourceViewer instanceof ITextViewerExtension) {
((ITextViewerExtension) sourceViewer).prependVerifyKeyListener(this.fBracketInserter);
}
}
/*
* @see org.eclipse.swt.dnd.DragSourceListener#dragStart(org.eclipse.swt.dnd.DragSourceEvent)
*/
@Override
public void dragStart(DragSourceEvent event) {
if (!fIsEnabled) {
event.doit = false;
return;
}
// convert screen coordinates to widget offest
int offset = getOffsetAtLocation(event.x, event.y, false);
// convert further to a document offset
offset = getDocumentOffset(offset);
Point selection = fViewer.getSelectedRange();
if (selection != null && offset >= selection.x && offset < selection.x + selection.y) {
fSelectionPosition = new Position(selection.x, selection.y);
if (fViewer instanceof ITextViewerExtension) {
((ITextViewerExtension) fViewer).getRewriteTarget().beginCompoundChange();
}
IDocument doc = fViewer.getDocument();
try {
// add the drag selection position
// the position is used to delete the selection on a DROP_MOVE
// and it can be used by the drop target to determine if it should
// allow the drop (e.g. if drop location overlaps selection)
doc.addPositionCategory(DRAG_SELECTION_CATEGORY);
fPositionUpdater = new DefaultPositionUpdater(DRAG_SELECTION_CATEGORY);
doc.addPositionUpdater(fPositionUpdater);
doc.addPosition(DRAG_SELECTION_CATEGORY, fSelectionPosition);
} catch (BadLocationException e) {
// should not happen
} catch (BadPositionCategoryException e) {
// cannot happen
}
event.doit = true;
// this has no effect?
event.detail = DND.DROP_COPY;
if (isDocumentEditable()) {
event.detail |= DND.DROP_MOVE;
}
} else {
event.doit = false;
event.detail = DND.DROP_NONE;
}
}
/*
* @see org.eclipse.swt.dnd.DragSourceListener#dragFinished(org.eclipse.swt.dnd.DragSourceEvent)
*/
@Override
public void dragFinished(DragSourceEvent event) {
IDocument doc = fViewer.getDocument();
try {
doc.removePositionCategory(DRAG_SELECTION_CATEGORY);
doc.removePositionUpdater(fPositionUpdater);
} catch (BadPositionCategoryException e1) {
// cannot happen
}
if (event.doit && event.detail == DND.DROP_MOVE && isDocumentEditable()) {
try {
doc.replace(fSelectionPosition.offset, fSelectionPosition.length, null);
} catch (BadLocationException e) {
// ignore
}
}
if (fViewer instanceof ITextViewerExtension) {
((ITextViewerExtension) fViewer).getRewriteTarget().endCompoundChange();
}
}
