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1
11 package org.eclipse.jdt.internal.ui.viewsupport;
12
13 import java.util.HashMap  ;
14 import java.util.Iterator ;
15 import java.util.Map ;
16
17 import org.eclipse.swt.events.DisposeEvent;
18 import org.eclipse.swt.events.DisposeListener;
19 import org.eclipse.swt.graphics.Color;
20 import org.eclipse.swt.widgets.Control;
21 import org.eclipse.swt.widgets.Display;
22 import org.eclipse.swt.widgets.Item;
23 import org.eclipse.swt.widgets.Table;
24 import org.eclipse.swt.widgets.Tree;
25 import org.eclipse.swt.widgets.TreeItem;
26
27 import org.eclipse.jface.resource.ColorRegistry;
28 import org.eclipse.jface.resource.JFaceResources;
29 import org.eclipse.jface.util.IPropertyChangeListener;
30 import org.eclipse.jface.util.PropertyChangeEvent;
31 import org.eclipse.jface.viewers.IBaseLabelProvider;
32 import org.eclipse.jface.viewers.StructuredViewer;
33
34 import org.eclipse.jdt.ui.PreferenceConstants;
35
36 import org.eclipse.jdt.internal.ui.preferences.AppearancePreferencePage;
37
38 public class ColoredViewersManager implements IPropertyChangeListener {
39
40 public static final String QUALIFIER_COLOR_NAME= "org.eclipse.jdt.ui.ColoredLabels.qualifier"; public static final String DECORATIONS_COLOR_NAME= "org.eclipse.jdt.ui.ColoredLabels.decorations"; public static final String COUNTER_COLOR_NAME= "org.eclipse.jdt.ui.ColoredLabels.counter"; public static final String INHERITED_COLOR_NAME= "org.eclipse.jdt.ui.ColoredLabels.inherited";
45 private static ColoredViewersManager fgInstance= new ColoredViewersManager();
46
47 private Map fManagedViewers;
48 private ColorRegistry fColorRegisty;
49
50 public ColoredViewersManager() {
51 fManagedViewers= new HashMap ();
52 fColorRegisty= JFaceResources.getColorRegistry();
53 }
54
55 public void installColoredLabels(StructuredViewer viewer) {
56 if (fManagedViewers.containsKey(viewer)) {
57 return; }
59 if (fManagedViewers.isEmpty()) {
60 PreferenceConstants.getPreferenceStore().addPropertyChangeListener(this);
62 fColorRegisty.addListener(this);
63 }
64 fManagedViewers.put(viewer, new ManagedViewer(viewer));
65 }
66
67
68 public void uninstallColoredLabels(StructuredViewer viewer) {
69 ManagedViewer mv= (ManagedViewer) fManagedViewers.remove(viewer);
70 if (mv == null)
71 return;
73 if (fManagedViewers.isEmpty()) {
74 PreferenceConstants.getPreferenceStore().removePropertyChangeListener(this);
75 fColorRegisty.removeListener(this);
76 }
78 }
79
80 public Color getColorForName(String symbolicName) {
81 return fColorRegisty.get(symbolicName);
82 }
83
84
85 public void propertyChange(PropertyChangeEvent event) {
86 String property= event.getProperty();
87 if (property.equals(QUALIFIER_COLOR_NAME) || property.equals(COUNTER_COLOR_NAME) || property.equals(DECORATIONS_COLOR_NAME)
88 || property.equals(AppearancePreferencePage.PREF_COLORED_LABELS)) {
89 Display.getDefault().asyncExec(new Runnable () {
90 public void run() {
91 refreshAllViewers();
92 }
93 });
94 }
95 }
96
97 protected final void refreshAllViewers() {
98 for (Iterator iterator= fManagedViewers.values().iterator(); iterator.hasNext();) {
99 ManagedViewer viewer= (ManagedViewer) iterator.next();
100 viewer.refresh();
101 }
102 }
103
104 private class ManagedViewer implements DisposeListener {
105
106 private static final String COLORED_LABEL_KEY= "coloredlabel";
108 private StructuredViewer fViewer;
109 private OwnerDrawSupport fOwnerDrawSupport;
110
111 private ManagedViewer(StructuredViewer viewer) {
112 fViewer= viewer;
113 fOwnerDrawSupport= null;
114 fViewer.getControl().addDisposeListener(this);
115 if (showColoredLabels()) {
116 installOwnerDraw();
117 }
118 }
119
120
123 public void widgetDisposed(DisposeEvent e) {
124 uninstallColoredLabels(fViewer);
125 }
126
127 public final void refresh() {
128 Control control= fViewer.getControl();
129 if (!control.isDisposed()) {
130 if (showColoredLabels()) {
131 installOwnerDraw();
132 } else {
133 uninstallOwnerDraw();
134 }
135 }
136 }
137
138 protected void installOwnerDraw() {
139 if (fOwnerDrawSupport == null) {
140 fOwnerDrawSupport= new OwnerDrawSupport(fViewer.getControl()) { public ColoredString getColoredLabel(Item item) {
143 return getColoredLabelForView(item);
144 }
145
146 public Color getColor(String foregroundColorName, Display display) {
147 return getColorForName(foregroundColorName);
148 }
149 };
150 }
151 refreshViewer();
152 }
153
154 protected void uninstallOwnerDraw() {
155 if (fOwnerDrawSupport == null)
156 return;
158 fOwnerDrawSupport.dispose(); fOwnerDrawSupport= null;
160 refreshViewer();
161 }
162
163 private void refreshViewer() {
164 Control control= fViewer.getControl();
165 if (!control.isDisposed()) {
166 if (control instanceof Tree) {
167 refresh(((Tree) control).getItems());
168 } else if (control instanceof Table) {
169 refresh(((Table) control).getItems());
170 }
171 }
172 }
173
174 private void refresh(Item[] items) {
175 for (int i= 0; i < items.length; i++) {
176 Item item= items[i];
177 item.setData(COLORED_LABEL_KEY, null);
178 String text= item.getText();
179 item.setText(""); item.setText(text);
181 if (item instanceof TreeItem) {
182 refresh(((TreeItem) item).getItems());
183 }
184 }
185 }
186
187 private ColoredString getColoredLabelForView(Item item) {
188 ColoredString oldLabel= (ColoredString) item.getData(COLORED_LABEL_KEY);
189 String itemText= item.getText();
190 if (oldLabel != null && oldLabel.getString().equals(itemText)) {
191 return oldLabel;
193 }
194 ColoredString newLabel= null;
195 IBaseLabelProvider labelProvider= fViewer.getLabelProvider();
196 if (labelProvider instanceof IRichLabelProvider) {
197 newLabel= ((IRichLabelProvider) labelProvider).getRichTextLabel(item.getData());
198 }
199 if (newLabel == null) {
200 newLabel= new ColoredString(itemText); } else if (!newLabel.getString().equals(itemText)) {
202 newLabel= ColoredJavaElementLabels.decorateColoredString(newLabel, itemText, ColoredJavaElementLabels.DECORATIONS_STYLE);
204 }
205 item.setData(COLORED_LABEL_KEY, newLabel); return newLabel;
207 }
208
209 }
210
211 public static boolean showColoredLabels() {
212 String preference= PreferenceConstants.getPreference(AppearancePreferencePage.PREF_COLORED_LABELS, null);
213 return preference != null && Boolean.valueOf(preference).booleanValue();
214 }
215
216 public static void install(StructuredViewer viewer) {
217 fgInstance.installColoredLabels(viewer);
218 }
219
220
221 }
222 |
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