| /******************************************************************************* |
| * Copyright (c) 2012 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.wst.xml.ui.internal.contentassist; |
| |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.jface.text.ITextViewer; |
| import org.eclipse.jface.text.contentassist.IContextInformation; |
| import org.eclipse.jface.text.link.LinkedModeModel; |
| import org.eclipse.jface.text.link.LinkedModeUI; |
| import org.eclipse.jface.text.link.LinkedPosition; |
| import org.eclipse.jface.text.link.LinkedPositionGroup; |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.ui.texteditor.link.EditorLinkedModeUI; |
| import org.eclipse.wst.sse.ui.internal.contentassist.CustomCompletionProposal; |
| import org.eclipse.wst.xml.ui.internal.Logger; |
| |
| /** |
| * A completion proposal that is capable of establishing linked positions within |
| * inserted markup. |
| * |
| */ |
| public class MarkupCompletionProposal extends CustomCompletionProposal { |
| |
| private IRegion fSelectedRegion = null; |
| |
| public MarkupCompletionProposal(String replacementString, int replacementOffset, int replacementLength, int cursorPosition, Image image, String displayString, IContextInformation contextInformation, String additionalProposalInfo, int relevance) { |
| super(replacementString, replacementOffset, replacementLength, cursorPosition, image, displayString, contextInformation, additionalProposalInfo, relevance); |
| } |
| |
| public MarkupCompletionProposal(String replacementString, int replacementOffset, int replacementLength, int cursorPosition, Image image, String displayString, IContextInformation contextInformation, String additionalProposalInfo, int relevance, boolean updateReplacementLengthOnValidate) { |
| super(replacementString, replacementOffset, replacementLength, cursorPosition, image, displayString, null, contextInformation, additionalProposalInfo, relevance, updateReplacementLengthOnValidate); |
| } |
| |
| public MarkupCompletionProposal(String replacementString, int replacementOffset, int replacementLength, int cursorPosition, Image image, String displayString, String alternateMatch, IContextInformation contextInformation, String additionalProposalInfo, int relevance, boolean updateReplacementLengthOnValidate) { |
| super(replacementString, replacementOffset, replacementLength, cursorPosition, image, displayString, alternateMatch, contextInformation, additionalProposalInfo, relevance, updateReplacementLengthOnValidate); |
| } |
| |
| public void apply(ITextViewer viewer, char trigger, int stateMask, int offset) { |
| super.apply(viewer, trigger, stateMask, offset); |
| |
| getLinkedPositions(viewer); |
| } |
| |
| /** |
| * Sets up linked positions and installs them on the viewer. |
| * |
| */ |
| protected void getLinkedPositions(ITextViewer viewer) { |
| final String replacement = getReplacementString(); |
| final IDocument document = viewer.getDocument(); |
| final int length = replacement.length(); |
| boolean inAttribute = false, hasGroup = false, inEndTag = false; |
| int offset = 0; |
| char attType = 0; |
| int exitPosition = -1; |
| LinkedModeModel model = new LinkedModeModel(); |
| |
| try { |
| for (int i = 0; i < length; i++) { |
| final char c = replacement.charAt(i); |
| switch (c) { |
| case '=': |
| break; |
| case '\'': |
| case '\"': |
| if (!inAttribute) { |
| offset = i; |
| attType = c; |
| inAttribute = true; |
| } |
| else { |
| // Found matching quotes establishing an attribute value region |
| if (attType == c && replacement.charAt(i - 1) != '\\') { |
| inAttribute = false; // Record position length |
| addPosition(model, document, getReplacementOffset() + offset + 1, i - offset - 1); |
| hasGroup = true; |
| } |
| } |
| break; |
| case '/': |
| if (!inAttribute) { |
| inEndTag = i > 0 && replacement.charAt(i - 1) == '<'; |
| } |
| break; |
| case '>': |
| if (!inAttribute) { |
| if (i == length - 1) { |
| exitPosition = getReplacementOffset() + i + 1; |
| if (!inEndTag) { // Don't add a position within the end-tag |
| addPosition(model, document, getReplacementOffset() + i, 0); // position within start tag |
| hasGroup = true; |
| } |
| } |
| else { |
| addPosition(model, document, getReplacementOffset() + i, 0); // position within start tag |
| addPosition(model, document, getReplacementOffset() + i + 1, 0); // position after start tag |
| hasGroup = true; |
| } |
| } |
| break; |
| } |
| } |
| if (hasGroup) { |
| model.forceInstall(); |
| final LinkedModeUI ui= new EditorLinkedModeUI(model, viewer); |
| ui.setExitPosition(viewer, exitPosition < 0 ? getReplacementOffset() + getReplacementLength() + replacement.length() - 1 : exitPosition, 0, Integer.MAX_VALUE); |
| ui.setCyclingMode(LinkedModeUI.CYCLE_WHEN_NO_PARENT); |
| ui.setDoContextInfo(true); |
| ui.enter(); |
| fSelectedRegion = ui.getSelectedRegion(); |
| } |
| } |
| catch (BadLocationException e) { |
| Logger.logException(e); |
| } |
| } |
| |
| /** |
| * Adds a {@link LinkedPosition} to its own position group. This group is then added to the model |
| * @param model the linked model for this proposal |
| * @param document the document the content assist is operating upon |
| * @param offset the offset to establish the {@link LinkedPosition} |
| * @param length the length of the {@link LinkedPosition} |
| * @throws BadLocationException |
| */ |
| private void addPosition(LinkedModeModel model, IDocument document, int offset, int length) throws BadLocationException { |
| final LinkedPositionGroup group = new LinkedPositionGroup(); |
| group.addPosition(new LinkedPosition(document, offset, length, LinkedPositionGroup.NO_STOP)); |
| model.addGroup(group); |
| } |
| |
| public Point getSelection(IDocument document) { |
| // Attempt to return the selection based on the selected region from the LinkedModeUI |
| if (fSelectedRegion == null) |
| return super.getSelection(document); |
| return new Point(fSelectedRegion.getOffset(), fSelectedRegion.getLength()); |
| } |
| } |