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1 | /******************************************************************************* |
2 | * Copyright (c) 2000, 2011 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 | package org.eclipse.jdt.internal.ui.javaeditor; | |
12 | ||
13 | ||
14 | ||
15 | import org.eclipse.jface.action.IAction; | |
16 | import org.eclipse.jface.preference.IPreferenceStore; | |
17 | import org.eclipse.jface.util.IPropertyChangeListener; | |
18 | import org.eclipse.jface.util.PropertyChangeEvent; | |
19 | ||
20 | import org.eclipse.jface.text.IRegion; | |
21 | ||
22 | import org.eclipse.ui.IEditorInput; | |
23 | import org.eclipse.ui.PlatformUI; | |
24 | ||
25 | import org.eclipse.ui.texteditor.ITextEditor; | |
26 | import org.eclipse.ui.texteditor.TextEditorAction; | |
27 | ||
28 | import org.eclipse.jdt.core.IClassFile; | |
29 | ||
30 | import org.eclipse.jdt.ui.IWorkingCopyManager; | |
31 | import org.eclipse.jdt.ui.PreferenceConstants; | |
32 | ||
33 | import org.eclipse.jdt.internal.ui.IJavaHelpContextIds; | |
34 | import org.eclipse.jdt.internal.ui.JavaPlugin; | |
35 | import org.eclipse.jdt.internal.ui.JavaPluginImages; | |
36 | ||
37 | ||
38 | /** | |
39 | * A tool bar action which toggles the presentation model of the | |
40 | * connected text editor. The editor shows either the highlight range | |
41 | * only or always the whole document. | |
42 | */ | |
43 | public class TogglePresentationAction extends TextEditorAction implements IPropertyChangeListener { | |
44 | ||
45 | private IPreferenceStore fStore; | |
46 | ||
47 | /** | |
48 | * Constructs and updates the action. | |
49 | */ | |
50 | public TogglePresentationAction() { | |
51 | super(JavaEditorMessages.getBundleForConstructedKeys(), "TogglePresentation.", null, IAction.AS_CHECK_BOX); //$NON-NLS-1$ | |
52 | JavaPluginImages.setToolImageDescriptors(this, "segment_edit.gif"); //$NON-NLS-1$ | |
53 | PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.TOGGLE_PRESENTATION_ACTION); | |
54 | update(); | |
55 | } | |
56 | ||
57 | /* | |
58 | * @see IAction#actionPerformed | |
59 | */ | |
60 | @Override | |
61 | public void run() { | |
62 | ||
63 | ITextEditor editor= getTextEditor(); | |
64 | if (editor == null) | |
65 | return; | |
66 | ||
67 | IRegion remembered= editor.getHighlightRange(); | |
68 | editor.resetHighlightRange(); | |
69 | ||
70 | boolean showAll= !editor.showsHighlightRangeOnly(); | |
71 | setChecked(showAll); | |
72 | ||
73 | editor.showHighlightRangeOnly(showAll); | |
74 | if (remembered != null) | |
75 | editor.setHighlightRange(remembered.getOffset(), remembered.getLength(), true); | |
76 | ||
77 | fStore.removePropertyChangeListener(this); | |
78 | fStore.setValue(PreferenceConstants.EDITOR_SHOW_SEGMENTS, showAll); | |
79 | fStore.addPropertyChangeListener(this); | |
80 | } | |
81 | ||
82 | /* | |
83 | * @see TextEditorAction#update | |
84 | */ | |
85 | @Override | |
86 | public void update() { | |
87 | ITextEditor editor= getTextEditor(); | |
88 | boolean checked= (editor != null && editor.showsHighlightRangeOnly()); | |
89 | setChecked(checked); | |
90 | if (editor instanceof CompilationUnitEditor) { | |
91 | IWorkingCopyManager manager= JavaPlugin.getDefault().getWorkingCopyManager(); | |
92 | setEnabled(manager.getWorkingCopy(editor.getEditorInput()) != null); | |
93 | } else if (editor instanceof ClassFileEditor) { | |
94 | IEditorInput input= editor.getEditorInput(); | |
95 | IClassFile cf= null; | |
96 | if (input instanceof IClassFileEditorInput) { | |
97 | IClassFileEditorInput cfi= (IClassFileEditorInput)input; | |
98 | cf= cfi.getClassFile(); | |
99 | } | |
100 | setEnabled(cf != null && cf.exists()); | |
101 | } else | |
102 | setEnabled(editor != null); | |
103 | } | |
104 | ||
105 | /* | |
106 | * @see TextEditorAction#setEditor(ITextEditor) | |
107 | */ | |
108 | @Override | |
109 | public void setEditor(ITextEditor editor) { | |
110 | ||
111 | super.setEditor(editor); | |
112 | ||
113 | if (editor != null) { | |
114 | ||
115 | if (fStore == null) { | |
116 | fStore= JavaPlugin.getDefault().getPreferenceStore(); | |
117 | fStore.addPropertyChangeListener(this); | |
118 | } | |
119 | synchronizeWithPreference(editor); | |
120 | ||
121 | } else if (fStore != null) { | |
122 | fStore.removePropertyChangeListener(this); | |
123 | fStore= null; | |
124 | } | |
125 | ||
126 | update(); | |
127 | } | |
128 | ||
129 | /** | |
130 | * Synchronizes the appearance of the editor with what the preference store tells him. | |
131 | * | |
132 | * @param editor the text editor | |
133 | */ | |
134 | private void synchronizeWithPreference(ITextEditor editor) { | |
135 | ||
136 | if (editor == null) | |
137 | return; | |
138 | ||
139 | boolean showSegments= fStore.getBoolean(PreferenceConstants.EDITOR_SHOW_SEGMENTS); | |
140 | setChecked(showSegments); | |
141 | ||
142 | if (editor.showsHighlightRangeOnly() != showSegments) { | |
143 | IRegion remembered= editor.getHighlightRange(); | |
144 | editor.resetHighlightRange(); | |
145 | editor.showHighlightRangeOnly(showSegments); | |
146 | if (remembered != null) | |
147 | editor.setHighlightRange(remembered.getOffset(), remembered.getLength(), true); | |
148 | } | |
149 | } | |
150 | ||
151 | /* | |
152 | * @see IPropertyChangeListener#propertyChange(PropertyChangeEvent) | |
153 | */ | |
154 | public void propertyChange(PropertyChangeEvent event) { | |
155 | if (event.getProperty().equals(PreferenceConstants.EDITOR_SHOW_SEGMENTS)) | |
156 | synchronizeWithPreference(getTextEditor()); | |
157 | } | |
158 | } |