net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/text/template/TemplateEngine.java

   1 /*
   2  * (c) Copyright IBM Corp. 2000, 2001.
   3  * All Rights Reserved.
   4  */
   5 package net.sourceforge.phpdt.internal.ui.text.template;
   6
   7 import java.util.ArrayList;
   8
   9 import net.sourceforge.phpdt.internal.corext.template.ContextType;
  10 import net.sourceforge.phpdt.internal.corext.template.DocumentTemplateContext;
  11 import net.sourceforge.phpdt.internal.corext.template.Template;
  12 import net.sourceforge.phpdt.internal.corext.template.Templates;
  13 import net.sourceforge.phpdt.internal.corext.template.php.CompilationUnitContextType;
  14 import net.sourceforge.phpdt.internal.ui.PHPUiImages;
  15 import net.sourceforge.phpdt.internal.ui.text.java.IPHPCompletionProposal;
  16
  17 import org.eclipse.jface.text.BadLocationException;
  18 import org.eclipse.jface.text.IDocument;
  19 import org.eclipse.jface.text.IRegion;
  20 import org.eclipse.jface.text.ITextViewer;
  21 import org.eclipse.jface.text.Region;
  22 import org.eclipse.swt.graphics.Point;
  23 //import org.eclipse.jdt.internal.ui.text.link.LinkedPositionManager;
  24
  25 public class TemplateEngine {
  26
  27         /** The context type. */
  28         private ContextType fContextType;
  29         /** The result proposals. */
  30         private ArrayList fProposals= new ArrayList();
  31
  32         /**
  33          * Creates the template engine for a particular context type.
  34          * See <code>TemplateContext</code> for supported context types.
  35          */
  36         public TemplateEngine(ContextType contextType) {
  37         //      Assert.isNotNull(contextType);
  38                 fContextType= contextType;
  39         }
  40
  41         /**
  42          * Empties the collector.
  43          *
  44          * @param viewer the text viewer
  45          * @param unit   the compilation unit (may be <code>null</code>)
  46          */
  47         public void reset() {
  48                 fProposals.clear();
  49         }
  50
  51         /**
  52          * Returns the array of matching templates.
  53          */
  54         public IPHPCompletionProposal[] getResults() {
  55                 return (IPHPCompletionProposal[]) fProposals.toArray(new IPHPCompletionProposal[fProposals.size()]);
  56         }
  57
  58         /**
  59          * Inspects the context of the compilation unit around <code>completionPosition</code>
  60          * and feeds the collector with proposals.
  61          * @param viewer the text viewer
  62          * @param completionPosition the context position in the document of the text viewer
  63          * @param compilationUnit the compilation unit (may be <code>null</code>)
  64          */
  65         public void complete(ITextViewer viewer, int completionPosition)
  66   //,ICompilationUnit compilationUnit)
  67         //hrows JavaModelException
  68         {
  69             IDocument document= viewer.getDocument();
  70
  71                 // prohibit recursion
  72 //              if (LinkedPositionManager.hasActiveManager(document))
  73 //                      return;
  74
  75                 if (!(fContextType instanceof CompilationUnitContextType))
  76                         return;
  77
  78     Point selection= viewer.getSelectedRange();
  79     // remember selected text
  80     String selectedText= null;
  81     if (selection.y != 0) {
  82       try {
  83         selectedText= document.get(selection.x, selection.y);
  84       } catch (BadLocationException e) {}
  85     }
  86
  87                 ((CompilationUnitContextType) fContextType).setContextParameters(document, completionPosition, selection.y);//mpilationUnit);
  88                 DocumentTemplateContext context= (DocumentTemplateContext) fContextType.createContext();
  89                 int start= context.getStart();
  90                 int end= context.getEnd();
  91                 IRegion region= new Region(start, end - start);
  92
  93                 Template[] templates= Templates.getInstance().getTemplates();
  94                 for (int i= 0; i != templates.length; i++)
  95                         if (context.canEvaluate(templates[i]))
  96                                 fProposals.add(new TemplateProposal(templates[i], context, region, viewer, PHPUiImages.get(PHPUiImages.IMG_OBJS_TEMPLATE)));
  97         }
  98
  99 }
 100