/*
* Copyright (c) 2012, the Dart project authors.
*
* Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.eclipse.org/legal/epl-v10.html
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.dart.tools.ui.internal.viewsupport;
import com.google.dart.tools.internal.corext.fix.LinkedProposalModel;
import com.google.dart.tools.internal.corext.fix.LinkedProposalPositionGroup;
import com.google.dart.tools.ui.DartToolsPlugin;
import com.google.dart.tools.ui.DartUI;
import com.google.dart.tools.ui.internal.text.editor.DartEditor;
import com.google.dart.tools.ui.internal.text.editor.EditorHighlightingSynchronizer;
import com.google.dart.tools.ui.text.dart.IDartCompletionProposal;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.DocumentEvent;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.contentassist.ICompletionProposalExtension2;
import org.eclipse.jface.text.contentassist.IContextInformation;
import org.eclipse.jface.text.link.ILinkedModeListener;
import org.eclipse.jface.text.link.LinkedModeModel;
import org.eclipse.jface.text.link.LinkedModeUI;
import org.eclipse.jface.text.link.LinkedModeUI.ExitFlags;
import org.eclipse.jface.text.link.LinkedPosition;
import org.eclipse.jface.text.link.LinkedPositionGroup;
import org.eclipse.jface.text.link.ProposalPosition;
import org.eclipse.swt.events.VerifyEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.text.edits.MalformedTreeException;
import org.eclipse.text.edits.TextEdit;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.texteditor.link.EditorLinkedModeUI;
import java.util.Iterator;
/**
* Does the setup of the linked mode from a {@link LinkedProposalModel}
*/
public class LinkedProposalModelPresenter {
private static class LinkedModeExitPolicy implements LinkedModeUI.IExitPolicy {
@Override
public ExitFlags doExit(LinkedModeModel model, VerifyEvent event, int offset, int length) {
if (event.character == '=') {
return new ExitFlags(ILinkedModeListener.EXIT_ALL, true);
}
return null;
}
}
private static class LinkedPositionProposalImpl implements ICompletionProposalExtension2,
IDartCompletionProposal {
private final LinkedProposalPositionGroup.Proposal fProposal;
private final LinkedModeModel fLinkedPositionModel;
public LinkedPositionProposalImpl(LinkedProposalPositionGroup.Proposal proposal,
LinkedModeModel model) {
fProposal = proposal;
fLinkedPositionModel = model;
}
@Override
public void apply(IDocument document) {
// not called
}
@Override
public void apply(ITextViewer viewer, char trigger, int stateMask, int offset) {
IDocument doc = viewer.getDocument();
LinkedPosition position = fLinkedPositionModel.findPosition(new LinkedPosition(doc, offset, 0));
if (position != null) {
try {
try {
TextEdit edit = fProposal.computeEdits(
offset,
position,
trigger,
stateMask,
fLinkedPositionModel);
if (edit != null) {
edit.apply(position.getDocument(), 0);
}
} catch (MalformedTreeException e) {
throw new CoreException(new Status(
IStatus.ERROR,
DartUI.ID_PLUGIN,
IStatus.ERROR,
"Unexpected exception applying edit", e)); //$NON-NLS-1$
} catch (BadLocationException e) {
throw new CoreException(new Status(
IStatus.ERROR,
DartUI.ID_PLUGIN,
IStatus.ERROR,
"Unexpected exception applying edit", e)); //$NON-NLS-1$
}
} catch (CoreException e) {
DartToolsPlugin.log(e);
}
}
}
@Override
public String getAdditionalProposalInfo() {
return fProposal.getAdditionalProposalInfo();
}
@Override
public IContextInformation getContextInformation() {
return null;
}
@Override
public String getDisplayString() {
return fProposal.getDisplayString();
}
@Override
public Image getImage() {
return fProposal.getImage();
}
@Override
public int getRelevance() {
return fProposal.getRelevance();
}
@Override
public Point getSelection(IDocument document) {
return null;
}
@Override
public void selected(ITextViewer viewer, boolean smartToggle) {
}
@Override
public void unselected(ITextViewer viewer) {
}
@Override
public boolean validate(IDocument document, int offset, DocumentEvent event) {
// ignore event
String insert = getDisplayString();
int off;
LinkedPosition pos = fLinkedPositionModel.findPosition(new LinkedPosition(document, offset, 0));
if (pos != null) {
off = pos.getOffset();
} else {
off = Math.max(0, offset - insert.length());
}
int length = offset - off;
if (offset <= document.getLength()) {
try {
String content = document.get(off, length);
if (insert.startsWith(content)) {
return true;
}
} catch (BadLocationException e) {
DartToolsPlugin.log(e);
// and ignore and return false
}
}
return false;
}
}
public LinkedProposalModelPresenter() {
}
public void enterLinkedMode(ITextViewer viewer, IEditorPart editor, boolean switchedEditor,
LinkedProposalModel linkedProposalModel) throws BadLocationException {
IDocument document = viewer.getDocument();
LinkedModeModel model = new LinkedModeModel();
boolean added = false;
Iterator<LinkedProposalPositionGroup> iterator = linkedProposalModel.getPositionGroupIterator();
while (iterator.hasNext()) {
LinkedProposalPositionGroup curr = iterator.next();
LinkedPositionGroup group = new LinkedPositionGroup();
LinkedProposalPositionGroup.PositionInformation[] positions = curr.getPositions();
if (positions.length > 0) {
LinkedProposalPositionGroup.Proposal[] linkedModeProposals = curr.getProposals();
if (linkedModeProposals.length <= 1) {
for (int i = 0; i < positions.length; i++) {
LinkedProposalPositionGroup.PositionInformation pos = positions[i];
if (pos.getOffset() != -1) {
group.addPosition(new LinkedPosition(
document,
pos.getOffset(),
pos.getLength(),
pos.getSequenceRank()));
}
}
} else {
LinkedPositionProposalImpl[] proposalImpls = new LinkedPositionProposalImpl[linkedModeProposals.length];
for (int i = 0; i < linkedModeProposals.length; i++) {
proposalImpls[i] = new LinkedPositionProposalImpl(linkedModeProposals[i], model);
}
for (int i = 0; i < positions.length; i++) {
LinkedProposalPositionGroup.PositionInformation pos = positions[i];
if (pos.getOffset() != -1) {
group.addPosition(new ProposalPosition(
document,
pos.getOffset(),
pos.getLength(),
pos.getSequenceRank(),
proposalImpls));
}
}
}
model.addGroup(group);
added = true;
}
}
model.forceInstall();
if (editor instanceof DartEditor) {
model.addLinkingListener(new EditorHighlightingSynchronizer((DartEditor) editor));
}
if (added) { // only set up UI if there are any positions set
LinkedModeUI ui = new EditorLinkedModeUI(model, viewer);
LinkedProposalPositionGroup.PositionInformation endPosition = linkedProposalModel.getEndPosition();
if (endPosition != null && endPosition.getOffset() != -1) {
ui.setExitPosition(
viewer,
endPosition.getOffset() + endPosition.getLength(),
0,
Integer.MAX_VALUE);
} else if (!switchedEditor) {
int cursorPosition = viewer.getSelectedRange().x;
if (cursorPosition != 0) {
ui.setExitPosition(viewer, cursorPosition, 0, Integer.MAX_VALUE);
}
}
ui.setExitPolicy(new LinkedModeExitPolicy());
ui.enter();
IRegion region = ui.getSelectedRegion();
viewer.setSelectedRange(region.getOffset(), region.getLength());
viewer.revealRange(region.getOffset(), region.getLength());
}
}
}