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Java > Open Source Codes > org > eclipse > ui > internal > tweaklets > TabBehaviourMRU


1 /*******************************************************************************
2  * Copyright (c) 2007 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  ******************************************************************************/
11
12 package org.eclipse.ui.internal.tweaklets;
13
14 import org.eclipse.jface.dialogs.IDialogConstants;
15 import org.eclipse.jface.dialogs.MessageDialog;
16 import org.eclipse.jface.dialogs.ProgressMonitorDialog;
17 import org.eclipse.osgi.util.NLS;
18 import org.eclipse.ui.IEditorInput;
19 import org.eclipse.ui.IEditorPart;
20 import org.eclipse.ui.IEditorReference;
21 import org.eclipse.ui.IReusableEditor;
22 import org.eclipse.ui.internal.EditorAreaHelper;
23 import org.eclipse.ui.internal.EditorManager;
24 import org.eclipse.ui.internal.EditorReference;
25 import org.eclipse.ui.internal.EditorSite;
26 import org.eclipse.ui.internal.IPreferenceConstants;
27 import org.eclipse.ui.internal.Workbench;
28 import org.eclipse.ui.internal.WorkbenchMessages;
29 import org.eclipse.ui.internal.WorkbenchPage;
30 import org.eclipse.ui.internal.WorkbenchPlugin;
31 import org.eclipse.ui.internal.progress.ProgressMonitorJobsDialog;
32 import org.eclipse.ui.internal.registry.EditorDescriptor;
33
34 /**
35  * @since 3.3
36  *
37  */
38 public class TabBehaviourMRU extends TabBehaviour {
39
40     public boolean alwaysShowPinAction() {
41         return false;
42     }
43
44     public IEditorReference findReusableEditor(WorkbenchPage page) {
45         boolean reuse = WorkbenchPlugin.getDefault().getPreferenceStore()
46                 .getBoolean(IPreferenceConstants.REUSE_EDITORS_BOOLEAN);
47         if (!reuse) {
48             return null;
49         }
50
51         IEditorReference editors[] = page.getSortedEditors();
52         if (editors.length < page.getEditorReuseThreshold()) {
53             return null;
54         }
55
56         IEditorReference dirtyEditor = null;
57
58         // Find a editor to be reused
59 for (int i = 0; i < editors.length; i++) {
60             IEditorReference editor = editors[i];
61             // if(editor == activePart)
62 // continue;
63 if (editor.isPinned()) {
64                 continue;
65             }
66             if (editor.isDirty()) {
67                 if (dirtyEditor == null) {
68                     dirtyEditor = editor;
69                 }
70                 continue;
71             }
72             return editor;
73         }
74         if (dirtyEditor == null) {
75             return null;
76         }
77
78         /* fix for 11122 */
79         boolean reuseDirty = WorkbenchPlugin.getDefault().getPreferenceStore()
80                 .getBoolean(IPreferenceConstants.REUSE_DIRTY_EDITORS);
81         if (!reuseDirty) {
82             return null;
83         }
84
85         MessageDialog dialog = new MessageDialog(page.getWorkbenchWindow()
86                 .getShell(),
87                 WorkbenchMessages.EditorManager_reuseEditorDialogTitle,
88                 null, // accept the default window icon
89 NLS.bind(WorkbenchMessages.EditorManager_saveChangesQuestion,
90                         dirtyEditor.getName()), MessageDialog.QUESTION,
91                 new String JavaDoc[] { IDialogConstants.YES_LABEL,
92                         IDialogConstants.NO_LABEL,
93                         WorkbenchMessages.EditorManager_openNewEditorLabel }, 0);
94         int result = dialog.open();
95         if (result == 0) { // YES
96 ProgressMonitorDialog pmd = new ProgressMonitorJobsDialog(dialog
97                     .getShell());
98             pmd.open();
99             dirtyEditor.getEditor(true).doSave(pmd.getProgressMonitor());
100             pmd.close();
101         } else if ((result == 2) || (result == -1)) {
102             return null;
103         }
104         return dirtyEditor;
105     }
106
107     public IEditorReference reuseInternalEditor(WorkbenchPage page,
108             EditorManager manager, EditorAreaHelper editorPresentation,
109             EditorDescriptor desc, IEditorInput input,
110             IEditorReference reusableEditorRef) {
111         IEditorPart reusableEditor = reusableEditorRef.getEditor(false);
112         if (reusableEditor == null) {
113             IEditorReference result = new EditorReference(manager, input, desc);
114             page.closeEditor(reusableEditorRef, false);
115             return result;
116         }
117
118         EditorSite site = (EditorSite) reusableEditor.getEditorSite();
119         EditorDescriptor oldDesc = site.getEditorDescriptor();
120         if ((desc.getId().equals(oldDesc.getId()))
121                 && (reusableEditor instanceof IReusableEditor)) {
122             Workbench wb = (Workbench) page.getWorkbenchWindow().getWorkbench();
123             editorPresentation.moveEditor(reusableEditor, -1);
124             wb.getEditorHistory().add(reusableEditor.getEditorInput(),
125                     site.getEditorDescriptor());
126             page.reuseEditor((IReusableEditor) reusableEditor, input);
127             return reusableEditorRef;
128         }
129         // findReusableEditor(...) checks pinned and saves editor if
130 // necessary, so it's OK to close "reusableEditor"
131 IEditorReference ref = new EditorReference(manager, input, desc);
132         reusableEditor.getEditorSite().getPage().closeEditor(reusableEditor,
133                 false);
134         return ref;
135     }
136
137 }
138
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