net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/text/template/IdentifierEngine.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.core.ICompilationUnit;
  10 import net.sourceforge.phpdt.internal.corext.template.php.CompilationUnitContextType;
  11 import net.sourceforge.phpdt.internal.corext.template.php.JavaContext;
  12 import net.sourceforge.phpdt.internal.corext.template.php.JavaContextType;
  13 import net.sourceforge.phpdt.internal.ui.PHPUiImages;
  14 import net.sourceforge.phpdt.internal.ui.text.java.IPHPCompletionProposal;
  15 import net.sourceforge.phpeclipse.ui.WebUI;
  16 //import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  17
  18 import org.eclipse.jface.text.BadLocationException;
  19 import org.eclipse.jface.text.IDocument;
  20 import org.eclipse.jface.text.IRegion;
  21 import org.eclipse.jface.text.ITextViewer;
  22 import org.eclipse.jface.text.Region;
  23 import org.eclipse.swt.graphics.Point;
  24
  25 public class IdentifierEngine {
  26
  27         /** The context type. */
  28         private JavaContextType fContextType;
  29
  30         /** The result proposals. */
  31         private ArrayList fProposals = new ArrayList();
  32
  33         /**
  34          * Creates the template engine for a particular context type. See
  35          * <code>TemplateContext</code> for supported context types.
  36          */
  37         public IdentifierEngine(JavaContextType contextType) {
  38                 // Assert.isNotNull(contextType);
  39                 fContextType = contextType;
  40         }
  41
  42         /**
  43          * Empties the collector.
  44          *
  45          * @param viewer
  46          *            the text viewer
  47          * @param unit
  48          *            the compilation unit (may be <code>null</code>)
  49          */
  50         public void reset() {
  51                 fProposals.clear();
  52         }
  53
  54         /**
  55          * Returns the array of matching templates.
  56          */
  57         public IPHPCompletionProposal[] getResults() {
  58                 return (IPHPCompletionProposal[]) fProposals
  59                                 .toArray(new IPHPCompletionProposal[fProposals.size()]);
  60         }
  61
  62         /**
  63          * Inspects the context of the compilation unit around
  64          * <code>completionPosition</code> and feeds the collector with proposals.
  65          *
  66          * @param viewer
  67          *            the text viewer
  68          * @param completionPosition
  69          *            the context position in the document of the text viewer
  70          * @param compilationUnit
  71          *            the compilation unit (may be <code>null</code>)
  72          */
  73         public void complete(ITextViewer viewer, int completionPosition,
  74                         Object[] identifiers, ICompilationUnit compilationUnit)
  75         // hrows JavaModelException
  76         {
  77                 IDocument document = viewer.getDocument();
  78
  79                 if (!(fContextType instanceof CompilationUnitContextType))
  80                         return;
  81
  82                 Point selection = viewer.getSelectedRange();
  83                 // remember selected text
  84                 String selectedText = null;
  85                 if (selection.y != 0) {
  86                         try {
  87                                 selectedText = document.get(selection.x, selection.y);
  88                         } catch (BadLocationException e) {
  89                         }
  90                 }
  91
  92                 // ((CompilationUnitContextType)
  93                 // fContextType).setContextParameters(document, completionPosition,
  94                 // selection.y); //mpilationUnit);
  95
  96                 // JavaContext context = (JavaContext) fContextType.createContext();
  97                 JavaContext context = (JavaContext) fContextType.createContext(
  98                                 document, completionPosition, selection.y, compilationUnit);
  99                 context.setVariable("selection", selectedText); //$NON-NLS-1$
 100
 101                 int start = context.getStart();
 102                 int end = context.getEnd();
 103                 IRegion region = new Region(start, end - start);
 104
 105                 // Template[] templates= Templates.getInstance().getTemplates();
 106                 String identifier = null;
 107                 int maxProposals = WebUI.MAX_PROPOSALS;
 108
 109                 for (int i = 0; i != identifiers.length; i++) {
 110                         identifier = (String) identifiers[i];
 111                         if (context.canEvaluate(identifier)) {
 112                                 if (maxProposals-- < 0) {
 113                                         return;
 114                                 }
 115                                 fProposals.add(new IdentifierProposal(identifier, context,
 116                                                 region, viewer, PHPUiImages.get(PHPUiImages.IMG_FUN),
 117                                                 PHPUiImages.get(PHPUiImages.IMG_VAR)));
 118                         }
 119                 }
 120         }
 121
 122 }