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11 package org.eclipse.jdt.internal.ui.text;
12
13
14 import java.util.HashMap  ;
15 import java.util.List ;
16 import java.util.Map ;
17
18 import org.eclipse.swt.SWT;
19 import org.eclipse.swt.graphics.Color;
20 import org.eclipse.swt.graphics.RGB;
21 import org.eclipse.swt.widgets.Display;
22
23 import org.eclipse.jface.preference.IPreferenceStore;
24 import org.eclipse.jface.preference.PreferenceConverter;
25 import org.eclipse.jface.resource.StringConverter;
26 import org.eclipse.jface.text.TextAttribute;
27 import org.eclipse.jface.text.rules.BufferedRuleBasedScanner;
28 import org.eclipse.jface.text.rules.IRule;
29 import org.eclipse.jface.text.rules.IToken;
30 import org.eclipse.jface.text.rules.Token;
31 import org.eclipse.jface.util.PropertyChangeEvent;
32
33 import org.eclipse.jdt.ui.PreferenceConstants;
34 import org.eclipse.jdt.ui.text.IColorManager;
35 import org.eclipse.jdt.ui.text.IColorManagerExtension;
36
37
38
63 public abstract class AbstractJavaScanner extends BufferedRuleBasedScanner {
64
65
66 private IColorManager fColorManager;
67 private IPreferenceStore fPreferenceStore;
68
69 private Map fTokenMap= new HashMap ();
70 private String [] fPropertyNamesColor;
71
75 private String [] fPropertyNamesBold;
76
82 private String [] fPropertyNamesItalic;
83
89 private String [] fPropertyNamesStrikethrough;
90
96 private String [] fPropertyNamesUnderline;
97
98
99 private boolean fNeedsLazyColorLoading;
100
101
125 abstract protected String [] getTokenProperties();
126
127
130 abstract protected List createRules();
131
132
133
136 public AbstractJavaScanner(IColorManager manager, IPreferenceStore store) {
137 super();
138 fColorManager= manager;
139 fPreferenceStore= store;
140 }
141
142
145 public final void initialize() {
146
147 fPropertyNamesColor= getTokenProperties();
148 int length= fPropertyNamesColor.length;
149 fPropertyNamesBold= new String [length];
150 fPropertyNamesItalic= new String [length];
151 fPropertyNamesStrikethrough= new String [length];
152 fPropertyNamesUnderline= new String [length];
153
154 for (int i= 0; i < length; i++) {
155 fPropertyNamesBold[i]= getBoldKey(fPropertyNamesColor[i]);
156 fPropertyNamesItalic[i]= getItalicKey(fPropertyNamesColor[i]);
157 fPropertyNamesStrikethrough[i]= getStrikethroughKey(fPropertyNamesColor[i]);
158 fPropertyNamesUnderline[i]= getUnderlineKey(fPropertyNamesColor[i]);
159 }
160
161 fNeedsLazyColorLoading= Display.getCurrent() == null;
162 for (int i= 0; i < length; i++) {
163 if (fNeedsLazyColorLoading)
164 addTokenWithProxyAttribute(fPropertyNamesColor[i], fPropertyNamesBold[i], fPropertyNamesItalic[i], fPropertyNamesStrikethrough[i], fPropertyNamesUnderline[i]);
165 else
166 addToken(fPropertyNamesColor[i], fPropertyNamesBold[i], fPropertyNamesItalic[i], fPropertyNamesStrikethrough[i], fPropertyNamesUnderline[i]);
167 }
168
169 initializeRules();
170 }
171
172 protected String getBoldKey(String colorKey) {
173 return colorKey + PreferenceConstants.EDITOR_BOLD_SUFFIX;
174 }
175
176 protected String getItalicKey(String colorKey) {
177 return colorKey + PreferenceConstants.EDITOR_ITALIC_SUFFIX;
178 }
179
180 protected String getStrikethroughKey(String colorKey) {
181 return colorKey + PreferenceConstants.EDITOR_STRIKETHROUGH_SUFFIX;
182 }
183
184 protected String getUnderlineKey(String colorKey) {
185 return colorKey + PreferenceConstants.EDITOR_UNDERLINE_SUFFIX;
186 }
187
188 public IToken nextToken() {
189 if (fNeedsLazyColorLoading)
190 resolveProxyAttributes();
191 return super.nextToken();
192 }
193
194 private void resolveProxyAttributes() {
195 if (fNeedsLazyColorLoading && Display.getCurrent() != null) {
196 for (int i= 0; i < fPropertyNamesColor.length; i++) {
197 addToken(fPropertyNamesColor[i], fPropertyNamesBold[i], fPropertyNamesItalic[i], fPropertyNamesStrikethrough[i], fPropertyNamesUnderline[i]);
198 }
199 fNeedsLazyColorLoading= false;
200 }
201 }
202
203 private void addTokenWithProxyAttribute(String colorKey, String boldKey, String italicKey, String strikethroughKey, String underlineKey) {
204 fTokenMap.put(colorKey, new Token(createTextAttribute(null, boldKey, italicKey, strikethroughKey, underlineKey)));
205 }
206
207 private void addToken(String colorKey, String boldKey, String italicKey, String strikethroughKey, String underlineKey) {
208 if (fColorManager != null && colorKey != null && fColorManager.getColor(colorKey) == null) {
209 RGB rgb= PreferenceConverter.getColor(fPreferenceStore, colorKey);
210 if (fColorManager instanceof IColorManagerExtension) {
211 IColorManagerExtension ext= (IColorManagerExtension) fColorManager;
212 ext.unbindColor(colorKey);
213 ext.bindColor(colorKey, rgb);
214 }
215 }
216
217 if (!fNeedsLazyColorLoading)
218 fTokenMap.put(colorKey, new Token(createTextAttribute(colorKey, boldKey, italicKey, strikethroughKey, underlineKey)));
219 else {
220 Token token= ((Token)fTokenMap.get(colorKey));
221 if (token != null)
222 token.setData(createTextAttribute(colorKey, boldKey, italicKey, strikethroughKey, underlineKey));
223 }
224 }
225
226
237 private TextAttribute createTextAttribute(String colorKey, String boldKey, String italicKey, String strikethroughKey, String underlineKey) {
238 Color color= null;
239 if (colorKey != null)
240 color= fColorManager.getColor(colorKey);
241
242 int style= fPreferenceStore.getBoolean(boldKey) ? SWT.BOLD : SWT.NORMAL;
243 if (fPreferenceStore.getBoolean(italicKey))
244 style |= SWT.ITALIC;
245
246 if (fPreferenceStore.getBoolean(strikethroughKey))
247 style |= TextAttribute.STRIKETHROUGH;
248
249 if (fPreferenceStore.getBoolean(underlineKey))
250 style |= TextAttribute.UNDERLINE;
251
252 return new TextAttribute(color, null, style);
253 }
254
255 protected Token getToken(String key) {
256 if (fNeedsLazyColorLoading)
257 resolveProxyAttributes();
258 return (Token) fTokenMap.get(key);
259 }
260
261 private void initializeRules() {
262 List rules= createRules();
263 if (rules != null) {
264 IRule[] result= new IRule[rules.size()];
265 rules.toArray(result);
266 setRules(result);
267 }
268 }
269
270 private int indexOf(String property) {
271 if (property != null) {
272 int length= fPropertyNamesColor.length;
273 for (int i= 0; i < length; i++) {
274 if (property.equals(fPropertyNamesColor[i]) || property.equals(fPropertyNamesBold[i]) || property.equals(fPropertyNamesItalic[i]) || property.equals(fPropertyNamesStrikethrough[i]) || property.equals(fPropertyNamesUnderline[i]))
275 return i;
276 }
277 }
278 return -1;
279 }
280
281 public boolean affectsBehavior(PropertyChangeEvent event) {
282 return indexOf(event.getProperty()) >= 0;
283 }
284
285 public void adaptToPreferenceChange(PropertyChangeEvent event) {
286 String p= event.getProperty();
287 int index= indexOf(p);
288 Token token= getToken(fPropertyNamesColor[index]);
289 if (fPropertyNamesColor[index].equals(p))
290 adaptToColorChange(token, event);
291 else if (fPropertyNamesBold[index].equals(p))
292 adaptToStyleChange(token, event, SWT.BOLD);
293 else if (fPropertyNamesItalic[index].equals(p))
294 adaptToStyleChange(token, event, SWT.ITALIC);
295 else if (fPropertyNamesStrikethrough[index].equals(p))
296 adaptToStyleChange(token, event, TextAttribute.STRIKETHROUGH);
297 else if (fPropertyNamesUnderline[index].equals(p))
298 adaptToStyleChange(token, event, TextAttribute.UNDERLINE);
299 }
300
301 private void adaptToColorChange(Token token, PropertyChangeEvent event) {
302 RGB rgb= null;
303
304 Object value= event.getNewValue();
305 if (value instanceof RGB)
306 rgb= (RGB) value;
307 else if (value instanceof String )
308 rgb= StringConverter.asRGB((String ) value);
309
310 if (rgb != null) {
311
312 String property= event.getProperty();
313 Color color= fColorManager.getColor(property);
314
315 if ((color == null || !rgb.equals(color.getRGB())) && fColorManager instanceof IColorManagerExtension) {
316 IColorManagerExtension ext= (IColorManagerExtension) fColorManager;
317
318 ext.unbindColor(property);
319 ext.bindColor(property, rgb);
320
321 color= fColorManager.getColor(property);
322 }
323
324 Object data= token.getData();
325 if (data instanceof TextAttribute) {
326 TextAttribute oldAttr= (TextAttribute) data;
327 token.setData(new TextAttribute(color, oldAttr.getBackground(), oldAttr.getStyle()));
328 }
329 }
330 }
331
332 private void adaptToStyleChange(Token token, PropertyChangeEvent event, int styleAttribute) {
333 boolean eventValue= false;
334 Object value= event.getNewValue();
335 if (value instanceof Boolean )
336 eventValue= ((Boolean ) value).booleanValue();
337 else if (IPreferenceStore.TRUE.equals(value))
338 eventValue= true;
339
340 Object data= token.getData();
341 if (data instanceof TextAttribute) {
342 TextAttribute oldAttr= (TextAttribute) data;
343 boolean activeValue= (oldAttr.getStyle() & styleAttribute) == styleAttribute;
344 if (activeValue != eventValue)
345 token.setData(new TextAttribute(oldAttr.getForeground(), oldAttr.getBackground(), eventValue ? oldAttr.getStyle() | styleAttribute : oldAttr.getStyle() & ~styleAttribute));
346 }
347 }
348
355 protected IPreferenceStore getPreferenceStore() {
356 return fPreferenceStore;
357 }
358 }
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