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