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   1 /*
   2  * (c) Copyright IBM Corp. 2000, 2001.
   3  * All Rights Reserved.
   4  */
   5 package net.sourceforge.phpdt.internal.corext.template.php;
   6
   7 import net.sourceforge.phpdt.internal.corext.template.ContextType;
   8 import net.sourceforge.phpdt.internal.corext.template.DocumentTemplateContext;
   9 import net.sourceforge.phpdt.internal.corext.template.Template;
  10 import net.sourceforge.phpdt.internal.corext.template.TemplateBuffer;
  11 import net.sourceforge.phpdt.internal.corext.template.TemplateTranslator;
  12
  13 import org.eclipse.core.runtime.CoreException;
  14 import org.eclipse.jface.text.BadLocationException;
  15 import org.eclipse.jface.text.IDocument;
  16
  17 /**
  18  * A context for phpdoc.
  19  */
  20 public class PHPDocContext extends DocumentTemplateContext  {
  21
  22         // tags
  23         private static final char HTML_TAG_BEGIN= '<';
  24         private static final char HTML_TAG_END= '>';
  25         private static final char JAVADOC_TAG_BEGIN= '@';
  26
  27         /**
  28          * Creates a phpdoc template context.
  29          *
  30          * @param type   the context type.
  31          * @param document the document.
  32          * @param completionPosition the completion position within the document.
  33          * @param unit the compilation unit (may be <code>null</code>).
  34          */
  35         public PHPDocContext(ContextType type, IDocument document, int completionOffset, int completionLength)
  36         //, int completionOffset, int completionLength, ICompilationUnit compilationUnit)
  37         {
  38     super(type, document, completionOffset, completionLength);
  39 //              super(type, document, completionOffset, completionLength, compilationUnit);
  40         }
  41
  42         /*
  43          * @see TemplateContext#canEvaluate(Template templates)
  44          */
  45         public boolean canEvaluate(Template template) {
  46                 String key= getKey();
  47
  48 //              if (fForceEvaluation)
  49 //                      return true;
  50     return template.matches(getKey(), getContextType().getName());
  51 //              return
  52 //                      template.matches(key, getContextType().getName()) &&
  53 //                      (key.length() != 0) && template.getName().toLowerCase().startsWith(key.toLowerCase());
  54         }
  55
  56         /*
  57          * @see DocumentTemplateContext#getStart()
  58          */
  59         public int getStart() {
  60                 try {
  61                         IDocument document= getDocument();
  62
  63                         if (getCompletionLength() == 0) {
  64                                 int start= getCompletionOffset();
  65
  66                                 if ((start != 0) && (document.getChar(start - 1) == HTML_TAG_END))
  67                                         start--;
  68
  69                                 while ((start != 0) && Character.isUnicodeIdentifierPart(document.getChar(start - 1)))
  70                                         start--;
  71
  72                                 if ((start != 0) && Character.isUnicodeIdentifierStart(document.getChar(start - 1)))
  73                                         start--;
  74
  75                                 // include html and phpdoc tags
  76                                 if ((start != 0) && (
  77                                         (document.getChar(start - 1) == HTML_TAG_BEGIN) ||
  78                                         (document.getChar(start - 1) == JAVADOC_TAG_BEGIN)))
  79                                 {
  80                                         start--;
  81                                 }
  82
  83                                 return start;
  84
  85                         } else {
  86
  87                                 int start= getCompletionOffset();
  88                                 int end= getCompletionOffset() + getCompletionLength();
  89
  90                                 while (start != 0 && Character.isUnicodeIdentifierPart(document.getChar(start - 1)))
  91                                         start--;
  92
  93                                 while (start != end && Character.isWhitespace(document.getChar(start)))
  94                                         start++;
  95
  96                                 if (start == end)
  97                                         start= getCompletionOffset();
  98
  99                                 return start;
 100                         }
 101
 102                 } catch (BadLocationException e) {
 103                         return getCompletionOffset();
 104                 }
 105         }
 106
 107         /*
 108          * @see net.sourceforge.phpdt.internal.corext.template.DocumentTemplateContext#getEnd()
 109          */
 110         public int getEnd() {
 111
 112                 if (getCompletionLength() == 0)
 113                         return super.getEnd();
 114
 115                 try {
 116                         IDocument document= getDocument();
 117
 118                         int start= getCompletionOffset();
 119                         int end= getCompletionOffset() + getCompletionLength();
 120
 121                         while (start != end && Character.isWhitespace(document.getChar(end - 1)))
 122                                 end--;
 123
 124                         return end;
 125
 126                 } catch (BadLocationException e) {
 127                         return super.getEnd();
 128                 }
 129         }
 130
 131         /*
 132          * @see net.sourceforge.phpdt.internal.corext.template.DocumentTemplateContext#getKey()
 133          */
 134         public String getKey() {
 135
 136                 if (getCompletionLength() == 0)
 137                         return super.getKey();
 138
 139                 try {
 140                         IDocument document= getDocument();
 141
 142                         int start= getStart();
 143                         int end= getCompletionOffset();
 144                         return start <= end
 145                                 ? document.get(start, end - start)
 146                                 : ""; //$NON-NLS-1$
 147
 148                 } catch (BadLocationException e) {
 149                         return super.getKey();
 150                 }
 151         }
 152
 153         /*
 154          * @see TemplateContext#evaluate(Template)
 155          */
 156         public TemplateBuffer evaluate(Template template) throws CoreException {
 157                 TemplateTranslator translator= new TemplateTranslator();
 158                 TemplateBuffer buffer= translator.translate(template.getPattern());
 159
 160                 getContextType().edit(buffer, this);
 161
 162                 return buffer;
 163         }
 164
 165 }
 166