1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Eclipse Public License, Version 1.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.eclipse.org/org/documents/epl-v10.php 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.ide.eclipse.adt.internal.editors; 18 19 import com.android.ide.eclipse.adt.AdtPlugin; 20 21 import org.eclipse.jface.action.IMenuManager; 22 import org.eclipse.jface.action.IStatusLineManager; 23 import org.eclipse.jface.action.IToolBarManager; 24 import org.eclipse.jface.viewers.ISelection; 25 import org.eclipse.jface.viewers.ISelectionChangedListener; 26 import org.eclipse.jface.viewers.SelectionChangedEvent; 27 import org.eclipse.jface.viewers.StructuredSelection; 28 import org.eclipse.swt.SWT; 29 import org.eclipse.swt.widgets.Composite; 30 import org.eclipse.swt.widgets.Control; 31 import org.eclipse.ui.IActionBars; 32 import org.eclipse.ui.PartInitException; 33 import org.eclipse.ui.part.IPageBookViewPage; 34 import org.eclipse.ui.part.Page; 35 import org.eclipse.ui.part.PageBook; 36 import org.eclipse.ui.views.contentoutline.IContentOutlinePage; 37 38 import java.util.ArrayList; 39 import java.util.List; 40 41 /** 42 * Outline used for XML editors that have multiple pages with separate outlines: 43 * switches between them 44 * <p> 45 * See https://bugs.eclipse.org/bugs/show_bug.cgi?id=1917 46 * <p> 47 * Modeled after .org.eclipse.pde.internal.ui.editor.PDEMultiPageContentOutline 48 */ 49 public class XmlEditorMultiOutline extends Page implements IContentOutlinePage, 50 ISelectionChangedListener { 51 private boolean mDisposed; 52 private PageBook mPageBook; 53 private IContentOutlinePage mCurrentPage; 54 private IActionBars mActionBars; 55 private IContentOutlinePage mEmptyPage; 56 private List<ISelectionChangedListener> mListeners; 57 private ISelection mSelection; 58 59 public XmlEditorMultiOutline() { 60 } 61 62 @Override 63 public Control getControl() { 64 return mPageBook; 65 } 66 67 @Override 68 public void createControl(Composite parent) { 69 mPageBook = new PageBook(parent, SWT.NONE); 70 } 71 72 @Override 73 public void dispose() { 74 mDisposed = true; 75 mListeners = null; 76 if (mPageBook != null && !mPageBook.isDisposed()) { 77 mPageBook.dispose(); 78 mPageBook = null; 79 } 80 if (mEmptyPage != null) { 81 mEmptyPage.dispose(); 82 mEmptyPage = null; 83 } 84 } 85 86 public boolean isDisposed() { 87 return mDisposed; 88 } 89 90 @Override 91 public void makeContributions(IMenuManager menuManager, IToolBarManager toolBarManager, 92 IStatusLineManager statusLineManager) { 93 } 94 95 @Override 96 public void setActionBars(IActionBars actionBars) { 97 mActionBars = actionBars; 98 if (mCurrentPage != null) { 99 setPageActive(mCurrentPage); 100 } 101 } 102 103 @Override 104 public void setFocus() { 105 if (mCurrentPage != null) { 106 mCurrentPage.setFocus(); 107 } 108 } 109 110 @Override 111 public void addSelectionChangedListener(ISelectionChangedListener listener) { 112 if (mListeners == null) { 113 mListeners = new ArrayList<ISelectionChangedListener>(2); 114 } 115 mListeners.add(listener); 116 } 117 118 @Override 119 public void removeSelectionChangedListener(ISelectionChangedListener listener) { 120 mListeners.remove(listener); 121 } 122 123 @Override 124 public ISelection getSelection() { 125 return mSelection; 126 } 127 128 @Override 129 public void selectionChanged(SelectionChangedEvent event) { 130 setSelection(event.getSelection()); 131 } 132 133 public void setPageActive(IContentOutlinePage page) { 134 if (page == null) { 135 if (mEmptyPage == null) { 136 mEmptyPage = new EmptyPage(); 137 } 138 page = mEmptyPage; 139 } 140 if (mCurrentPage != null) { 141 mCurrentPage.removeSelectionChangedListener(this); 142 } 143 page.addSelectionChangedListener(this); 144 mCurrentPage = page; 145 // Still initializing? 146 if (mPageBook == null) { 147 return; 148 } 149 Control control = page.getControl(); 150 if (control == null || control.isDisposed()) { 151 if (page instanceof IPageBookViewPage) { 152 try { 153 ((IPageBookViewPage) page).init(getSite()); 154 } catch (PartInitException e) { 155 AdtPlugin.log(e, null); 156 } 157 } 158 page.createControl(mPageBook); 159 page.setActionBars(mActionBars); 160 control = page.getControl(); 161 } 162 mPageBook.showPage(control); 163 } 164 165 @Override 166 public void setSelection(ISelection selection) { 167 mSelection = selection; 168 if (mListeners != null) { 169 SelectionChangedEvent e = new SelectionChangedEvent(this, selection); 170 for (int i = 0; i < mListeners.size(); i++) { 171 mListeners.get(i).selectionChanged(e); 172 } 173 } 174 } 175 176 private static class EmptyPage implements IContentOutlinePage { 177 private Composite mControl; 178 179 private EmptyPage() { 180 } 181 182 @Override 183 public void createControl(Composite parent) { 184 mControl = new Composite(parent, SWT.NULL); 185 } 186 187 @Override 188 public void dispose() { 189 } 190 191 @Override 192 public Control getControl() { 193 return mControl; 194 } 195 196 @Override 197 public void setActionBars(IActionBars actionBars) { 198 } 199 200 @Override 201 public void setFocus() { 202 } 203 204 @Override 205 public void addSelectionChangedListener(ISelectionChangedListener listener) { 206 } 207 208 @Override 209 public ISelection getSelection() { 210 return StructuredSelection.EMPTY; 211 } 212 213 @Override 214 public void removeSelectionChangedListener(ISelectionChangedListener listener) { 215 } 216 217 @Override 218 public void setSelection(ISelection selection) { 219 } 220 } 221 } 222
