net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/text/template/BuiltInEngine.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.text.java.IPHPCompletionProposal;
  14 //import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  15 import net.sourceforge.phpeclipse.phpeditor.php.PHPElement;
  16 import net.sourceforge.phpeclipse.phpeditor.php.PHPFunction;
  17 import net.sourceforge.phpeclipse.ui.WebUI;
  18
  19 import org.eclipse.jface.text.BadLocationException;
  20 import org.eclipse.jface.text.IDocument;
  21 import org.eclipse.jface.text.IRegion;
  22 import org.eclipse.jface.text.ITextViewer;
  23 import org.eclipse.jface.text.Region;
  24 import org.eclipse.swt.graphics.Point;
  25
  26 public class BuiltInEngine {
  27
  28         /** The context type. */
  29         private JavaContextType fContextType;
  30
  31         /** The result proposals. */
  32         private ArrayList fProposals = new ArrayList();
  33
  34         /**
  35          * Creates the template engine for a particular context type. See
  36          * <code>TemplateContext</code> for supported context types.
  37          */
  38         public BuiltInEngine(JavaContextType contextType) {
  39                 // Assert.isNotNull(contextType);
  40                 fContextType = contextType;
  41         }
  42
  43         /**
  44          * Empties the collector.
  45          *
  46          * @param viewer
  47          *            the text viewer
  48          * @param unit
  49          *            the compilation unit (may be <code>null</code>)
  50          */
  51         public void reset() {
  52                 fProposals.clear();
  53         }
  54
  55         /**
  56          * Returns the array of matching templates.
  57          */
  58         public IPHPCompletionProposal[] getResults() {
  59                 return (IPHPCompletionProposal[]) fProposals
  60                                 .toArray(new IPHPCompletionProposal[fProposals.size()]);
  61         }
  62
  63         /**
  64          * Inspects the context of the compilation unit around
  65          * <code>completionPosition</code> and feeds the collector with proposals.
  66          *
  67          * @param viewer
  68          *            the text viewer
  69          * @param completionPosition
  70          *            the context position in the document of the text viewer
  71          * @param compilationUnit
  72          *            the compilation unit (may be <code>null</code>)
  73          */
  74         public void complete(ITextViewer viewer, int completionPosition,
  75                         ArrayList identifiers, ICompilationUnit compilationUnit)
  76         // hrows JavaModelException
  77         {
  78                 IDocument document = viewer.getDocument();
  79
  80                 // prohibit recursion
  81                 // if (LinkedPositionManager.hasActiveManager(document))
  82                 // return;
  83
  84                 if (!(fContextType instanceof CompilationUnitContextType))
  85                         return;
  86                 Point selection = viewer.getSelectedRange();
  87                 // remember selected text
  88                 String selectedText = null;
  89                 if (selection.y != 0) {
  90                         try {
  91                                 selectedText = document.get(selection.x, selection.y);
  92                         } catch (BadLocationException e) {
  93                         }
  94                 }
  95
  96                 // ((CompilationUnitContextType)
  97                 // fContextType).setContextParameters(document, completionPosition,
  98                 // selection.y); //mpilationUnit);
  99                 // JavaContext context = (JavaContext) fContextType.createContext();
 100                 JavaContext context = (JavaContext) fContextType.createContext(
 101                                 document, completionPosition, selection.y, compilationUnit);
 102                 context.setVariable("selection", selectedText); //$NON-NLS-1$
 103                 int start = context.getStart();
 104                 int end = context.getEnd();
 105                 IRegion region = new Region(start, end - start);
 106
 107                 // Template[] templates= Templates.getInstance().getTemplates();
 108                 String identifier = null;
 109                 int maxProposals = WebUI.MAX_PROPOSALS;
 110                 PHPElement element = null;
 111                 for (int i = 0; i != identifiers.size(); i++) {
 112                         element = (PHPElement) identifiers.get(i);
 113                         if (element instanceof PHPFunction) {
 114                                 identifier = ((PHPFunction) element).getName();
 115                                 if (context.canEvaluate(identifier)) {
 116                                         if (maxProposals-- < 0) {
 117                                                 return;
 118                                         }
 119                                         fProposals.add(new BuiltInProposal(identifier,
 120                                                         (PHPFunction) element, context, region, viewer));
 121                                 }
 122                         }
 123                 }
 124         }
 125
 126 }