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   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2004 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpdt.internal.corext.template.php;
  12
  13 import net.sourceforge.phpdt.core.ICompilationUnit;
  14 import net.sourceforge.phpdt.core.IJavaElement;
  15 import net.sourceforge.phpdt.core.JavaModelException;
  16 import net.sourceforge.phpdt.internal.ui.text.template.contentassist.MultiVariableGuess;
  17
  18 import org.eclipse.jface.text.IDocument;
  19 import org.eclipse.jface.text.templates.DocumentTemplateContext;
  20 import org.eclipse.jface.text.templates.TemplateContextType;
  21
  22 // import
  23 // net.sourceforge.phpdt.internal.ui.text.template.contentassist.MultiVariableGuess;
  24
  25 /**
  26  * A compilation unit context.
  27  */
  28 public abstract class CompilationUnitContext extends DocumentTemplateContext {
  29
  30         /** The compilation unit, may be <code>null</code>. */
  31         private final ICompilationUnit fCompilationUnit;
  32
  33         /** A flag to force evaluation in head-less mode. */
  34         protected boolean fForceEvaluation;
  35
  36         /** A global state for proposals that change if a master proposal changes. */
  37         protected MultiVariableGuess fMultiVariableGuess;
  38
  39         /**
  40          * Creates a compilation unit context.
  41          *
  42          * @param type
  43          *            the context type
  44          * @param document
  45          *            the document
  46          * @param completionOffset
  47          *            the completion position within the document
  48          * @param completionLength
  49          *            the completion length within the document
  50          * @param compilationUnit
  51          *            the compilation unit (may be <code>null</code>)
  52          */
  53         protected CompilationUnitContext(TemplateContextType type,
  54                         IDocument document, int completionOffset, int completionLength,
  55                         ICompilationUnit compilationUnit) {
  56                 super(type, document, completionOffset, completionLength);
  57                 fCompilationUnit = compilationUnit;
  58         }
  59
  60         /**
  61          * Returns the compilation unit if one is associated with this context,
  62          * <code>null</code> otherwise.
  63          */
  64         public final ICompilationUnit getCompilationUnit() {
  65                 return fCompilationUnit;
  66         }
  67
  68         /**
  69          * Returns the enclosing element of a particular element type,
  70          * <code>null</code> if no enclosing element of that type exists.
  71          */
  72         public IJavaElement findEnclosingElement(int elementType) {
  73                 if (fCompilationUnit == null)
  74                         return null;
  75
  76                 try {
  77                         IJavaElement element = fCompilationUnit.getElementAt(getStart());
  78                         if (element == null) {
  79                                 element = fCompilationUnit;
  80                         }
  81
  82                         return element.getAncestor(elementType);
  83
  84                 } catch (JavaModelException e) {
  85                         return null;
  86                 }
  87         }
  88
  89         /**
  90          * Forces evaluation.
  91          */
  92         public void setForceEvaluation(boolean evaluate) {
  93                 fForceEvaluation = evaluate;
  94         }
  95
  96         /**
  97          * Returns the multivariable guess - state
  98          *
  99          * @return
 100          */
 101         public MultiVariableGuess getMultiVariableGuess() {
 102                 return fMultiVariableGuess;
 103         }
 104
 105         /**
 106          * @param multiVariableGuess
 107          *            The multiVariableGuess to set.
 108          */
 109         public void setMultiVariableGuess(MultiVariableGuess multiVariableGuess) {
 110                 fMultiVariableGuess = multiVariableGuess;
 111         }
 112 }