net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/text/AbstractJavaScanner.java

   1 package net.sourceforge.phpdt.internal.ui.text;
   2
   3 /*
   4  * (c) Copyright IBM Corp. 2000, 2001.
   5  * All Rights Reserved.
   6  */
   7
   8 import java.util.HashMap;
   9 import java.util.List;
  10 import java.util.Map;
  11
  12 import org.eclipse.swt.SWT;
  13 import org.eclipse.swt.graphics.RGB;
  14
  15 import org.eclipse.jface.preference.IPreferenceStore;
  16 import org.eclipse.jface.preference.PreferenceConverter;
  17 import org.eclipse.jface.resource.StringConverter;
  18 import org.eclipse.jface.text.TextAttribute;
  19 import org.eclipse.jface.text.rules.BufferedRuleBasedScanner;
  20 import org.eclipse.jface.text.rules.IRule;
  21 import org.eclipse.jface.text.rules.Token;
  22 import org.eclipse.jface.util.PropertyChangeEvent;
  23
  24 import net.sourceforge.phpdt.ui.text.IColorManager;
  25 import net.sourceforge.phpdt.ui.text.IColorManagerExtension;
  26
  27
  28 /**
  29  * Initialized with a color manager and a preference store, its subclasses are
  30  * only responsible for providing a list of preference keys based on which tokens
  31  * are generated and to use this tokens to define the rules controlling this scanner.
  32  */
  33 public abstract class AbstractJavaScanner extends BufferedRuleBasedScanner {
  34
  35
  36         private IColorManager fColorManager;
  37         private IPreferenceStore fPreferenceStore;
  38
  39         private Map fTokenMap= new HashMap();
  40         private String[] fPropertyNamesColor;
  41         private String[] fPropertyNamesStyle;
  42
  43
  44         /**
  45          * Returns the list of preference keys which define the tokens
  46          * used in the rules of this scanner.
  47          */
  48         abstract protected String[] getTokenProperties();
  49
  50         /**
  51          * Creates the list of rules controlling this scanner.
  52          */
  53         abstract protected List createRules();
  54
  55
  56         /**
  57          * Creates an abstract Java scanner.
  58          */
  59         public AbstractJavaScanner(IColorManager manager, IPreferenceStore store) {
  60                 super();
  61                 fColorManager= manager;
  62                 fPreferenceStore= store;
  63         }
  64
  65         /**
  66          * Must be called after the constructor has been called.
  67          */
  68         public final void initialize() {
  69
  70                 fPropertyNamesColor= getTokenProperties();
  71                 int length= fPropertyNamesColor.length;
  72                 fPropertyNamesStyle= new String[length];
  73                 for (int i= 0; i < length; i++) {
  74                         fPropertyNamesStyle[i]= fPropertyNamesColor[i] + "_bold"; //$NON-NLS-1$
  75                         addToken(fPropertyNamesColor[i], fPropertyNamesStyle[i]);
  76                 }
  77
  78                 initializeRules();
  79         }
  80
  81         private void addToken(String colorKey, String styleKey) {
  82                 RGB rgb= PreferenceConverter.getColor(fPreferenceStore, colorKey);
  83                 if (fColorManager instanceof IColorManagerExtension) {
  84                         IColorManagerExtension ext= (IColorManagerExtension) fColorManager;
  85                         ext.unbindColor(colorKey);
  86                         ext.bindColor(colorKey, rgb);
  87                 }
  88
  89                 boolean bold= fPreferenceStore.getBoolean(styleKey);
  90                 fTokenMap.put(colorKey, new Token(new TextAttribute(fColorManager.getColor(colorKey), null, bold ? SWT.BOLD : SWT.NORMAL)));
  91         }
  92
  93         protected Token getToken(String key) {
  94                 return (Token) fTokenMap.get(key);
  95         }
  96
  97         private void initializeRules() {
  98                 List rules= createRules();
  99                 if (rules != null) {
 100                         IRule[] result= new IRule[rules.size()];
 101                         rules.toArray(result);
 102                         setRules(result);
 103                 }
 104         }
 105
 106         private int indexOf(String property) {
 107                 if (property != null) {
 108                         int length= fPropertyNamesColor.length;
 109                         for (int i= 0; i < length; i++) {
 110                                 if (property.equals(fPropertyNamesColor[i]) || property.equals(fPropertyNamesStyle[i]))
 111                                         return i;
 112                         }
 113                 }
 114                 return -1;
 115         }
 116
 117         public boolean affectsBehavior(PropertyChangeEvent event) {
 118                 return indexOf(event.getProperty()) >= 0;
 119         }
 120
 121         public void adaptToPreferenceChange(PropertyChangeEvent event) {
 122                 String p= event.getProperty();
 123                 int index= indexOf(p);
 124                 Token token= getToken(fPropertyNamesColor[index]);
 125                 if (fPropertyNamesColor[index].equals(p))
 126                         adaptToColorChange(token, event);
 127                 else
 128                         adaptToStyleChange(token, event);
 129         }
 130
 131         private void adaptToColorChange(Token token, PropertyChangeEvent event) {
 132                 RGB rgb= null;
 133
 134                 Object value= event.getNewValue();
 135                 if (value instanceof RGB)
 136                         rgb= (RGB) value;
 137                 else if (value instanceof String)
 138                         rgb= StringConverter.asRGB((String) value);
 139
 140                 if (rgb != null) {
 141
 142                         String property= event.getProperty();
 143
 144                         if (fColorManager instanceof IColorManagerExtension) {
 145                                 IColorManagerExtension ext= (IColorManagerExtension) fColorManager;
 146                                 ext.unbindColor(property);
 147                                 ext.bindColor(property, rgb);
 148                         }
 149
 150                         Object data= token.getData();
 151                         if (data instanceof TextAttribute) {
 152                                 TextAttribute oldAttr= (TextAttribute) data;
 153                                 token.setData(new TextAttribute(fColorManager.getColor(property), oldAttr.getBackground(), oldAttr.getStyle()));
 154                         }
 155                 }
 156         }
 157
 158         private void adaptToStyleChange(Token token, PropertyChangeEvent event) {
 159                 boolean bold= false;
 160                 Object value= event.getNewValue();
 161                 if (value instanceof Boolean)
 162                         bold= ((Boolean) value).booleanValue();
 163                 else if (value instanceof String) {
 164                         String s= (String) value;
 165                         if (IPreferenceStore.TRUE.equals(s))
 166                                 bold= true;
 167                         else if (IPreferenceStore.FALSE.equals(s))
 168                                 bold= false;
 169                 }
 170
 171                 Object data= token.getData();
 172                 if (data instanceof TextAttribute) {
 173                         TextAttribute oldAttr= (TextAttribute) data;
 174                         boolean isBold= (oldAttr.getStyle() == SWT.BOLD);
 175                         if (isBold != bold)
 176                                 token.setData(new TextAttribute(oldAttr.getForeground(), oldAttr.getBackground(), bold ? SWT.BOLD : SWT.NORMAL));
 177                 }
 178         }
 179 }