| /******************************************************************************* |
| * Copyright (c) 2010, 2011 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.css.ui.internal.editor; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.core.runtime.IAdapterFactory; |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.wst.css.core.internal.document.CSSNodeImpl; |
| import org.eclipse.wst.css.core.internal.provisional.document.ICSSModel; |
| import org.eclipse.wst.css.core.internal.provisional.document.ICSSNode; |
| import org.eclipse.wst.css.core.internal.provisional.document.ICSSStyleSheet; |
| import org.eclipse.wst.css.ui.internal.Logger; |
| import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel; |
| import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion; |
| import org.eclipse.wst.sse.ui.internal.editor.SelectionConvertor; |
| |
| /** |
| * <p>Factory to adapt from {@link ICSSModel} to {@link SelectionConvertor}</p> |
| */ |
| public class CSSSelectionConverterFactory implements IAdapterFactory { |
| |
| /** the list of classes this factory can adapt to */ |
| private static final Class[] ADAPTER_LIST = new Class[]{SelectionConvertor.class}; |
| |
| /** the adapted class */ |
| private static final Object selectionConvertor = new CSSSelectionConverter(); |
| |
| /** |
| * <p>Default constructor</p> |
| */ |
| public CSSSelectionConverterFactory() { |
| } |
| |
| /** |
| * <p>Adapts {@link ICSSModel} to {@link SelectionConvertor}</p> |
| * |
| * @see org.eclipse.core.runtime.IAdapterFactory#getAdapter(java.lang.Object, java.lang.Class) |
| */ |
| public Object getAdapter(Object adaptableObject, Class adapterType) { |
| Object adapter = null; |
| if (adaptableObject instanceof ICSSModel && SelectionConvertor.class.equals(adapterType)) { |
| adapter = selectionConvertor; |
| } |
| return adapter; |
| } |
| |
| /** |
| * <p>Adapts to {@link SelectionConvertor}</p> |
| * |
| * @see org.eclipse.core.runtime.IAdapterFactory#getAdapterList() |
| */ |
| public Class[] getAdapterList() { |
| return ADAPTER_LIST; |
| } |
| |
| /** |
| * <p>{@link SelectionConvertor} specific to CSS</p> |
| */ |
| private static class CSSSelectionConverter extends SelectionConvertor { |
| /** |
| * <p>Default constructor</p> |
| */ |
| public CSSSelectionConverter() { |
| } |
| |
| /** |
| * @see org.eclipse.wst.sse.ui.internal.editor.SelectionConvertor#getElements(org.eclipse.wst.sse.core.internal.provisional.IStructuredModel, int, int) |
| */ |
| public Object[] getElements(IStructuredModel model, int start, int end) { |
| Object[] localSelectedStructures = null; |
| if (model != null) { |
| IndexedRegion region = model.getIndexedRegion(start); |
| |
| /* in CSS docs whitespace is owned by the style sheet |
| * this is to find the first none whitespace region |
| */ |
| if(region instanceof ICSSStyleSheet) { |
| try { |
| String selection = model.getStructuredDocument().get(start, end); |
| int whitespaceLength = beginingWhitespaceLength(selection); |
| region = model.getIndexedRegion(start+whitespaceLength+1); |
| } catch(BadLocationException e) { |
| //should never be able to happen |
| Logger.logException("Bad location on selection, this should never happen", e); |
| } |
| } |
| |
| if (region != null) { |
| // if single selection spans selected region |
| // else multiple selection |
| if (end <= region.getEndOffset()) { |
| // single selection |
| localSelectedStructures = new Object[1]; |
| localSelectedStructures[0] = region; |
| } |
| else { |
| int maxLength = model.getStructuredDocument().getLength(); |
| Set structures = new HashSet(); |
| while (region != null && region.getEndOffset() <= end && region.getEndOffset() <= maxLength && !structures.contains(region)) { |
| structures.add(region); |
| |
| //use the CSS model to find the next sibling |
| boolean foundNextSibling = false; |
| if(region instanceof CSSNodeImpl ) { |
| ICSSNode node = ((ICSSNode)region).getNextSibling(); |
| if(node instanceof IndexedRegion) { |
| region = (IndexedRegion)node; |
| foundNextSibling = true; |
| } |
| } |
| |
| if(!foundNextSibling) { |
| region = model.getIndexedRegion(region.getEndOffset() + 1); |
| } |
| } |
| localSelectedStructures = structures.toArray(); |
| } |
| } |
| } |
| if (localSelectedStructures == null) { |
| localSelectedStructures = new Object[0]; |
| } |
| return localSelectedStructures; |
| } |
| |
| } |
| |
| /** |
| * @param s find the length of the whitespace preceding this {@link String} |
| * @return the length of the whitespace preceding the given {@link String} |
| */ |
| private static int beginingWhitespaceLength(String s) { |
| int length = 0; |
| |
| for (int i = 0; i < s.length() && length == 0; ++i) { |
| if (!Character.isWhitespace(s.charAt(i))) { |
| length = i; |
| } |
| } |
| |
| return length; |
| } |
| } |