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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 java.util.Iterator;
  14
  15 import net.sourceforge.phpdt.core.ICompilationUnit;
  16 import net.sourceforge.phpdt.core.IJavaProject;
  17 import net.sourceforge.phpdt.internal.corext.Assert;
  18 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  19
  20 import org.eclipse.jface.text.BadLocationException;
  21 import org.eclipse.jface.text.DefaultLineTracker;
  22 import org.eclipse.jface.text.ILineTracker;
  23 import org.eclipse.jface.text.IRegion;
  24 import org.eclipse.jface.text.templates.Template;
  25 import org.eclipse.jface.text.templates.TemplateBuffer;
  26 import org.eclipse.jface.text.templates.TemplateContext;
  27 import org.eclipse.jface.text.templates.TemplateException;
  28 import org.eclipse.jface.text.templates.TemplateTranslator;
  29 import org.eclipse.jface.text.templates.TemplateVariableResolver;
  30
  31 public class CodeTemplateContext extends TemplateContext {
  32
  33         private String fLineDelimiter;
  34         private IJavaProject fProject;
  35
  36         public CodeTemplateContext(String contextTypeName, IJavaProject project, String lineDelim) {
  37                 super(PHPeclipsePlugin.getDefault().getCodeTemplateContextRegistry().getContextType(contextTypeName));
  38                 fLineDelimiter= lineDelim;
  39                 fProject= project;
  40         }
  41
  42         public IJavaProject getJavaProject() {
  43                 return fProject;
  44         }
  45
  46         /*
  47          * @see net.sourceforge.phpdt.internal.corext.template.TemplateContext#evaluate(net.sourceforge.phpdt.internal.corext.template.Template)
  48          */
  49         public TemplateBuffer evaluate(Template template) throws BadLocationException, TemplateException {
  50                 // test that all variables are defined
  51                 Iterator iterator= getContextType().resolvers();
  52                 while (iterator.hasNext()) {
  53                         TemplateVariableResolver var= (TemplateVariableResolver) iterator.next();
  54                         if (var instanceof CodeTemplateContextType.CodeTemplateVariableResolver) {
  55                         //      Assert.isNotNull(getVariable(var.getType()), "Variable " + var.getType() + "not defined"); //$NON-NLS-1$ //$NON-NLS-2$
  56                         }
  57                 }
  58
  59                 if (!canEvaluate(template))
  60                         return null;
  61
  62                 String pattern= changeLineDelimiter(template.getPattern(), fLineDelimiter);
  63
  64                 TemplateTranslator translator= new TemplateTranslator();
  65                 TemplateBuffer buffer= translator.translate(pattern);
  66                 getContextType().resolve(buffer, this);
  67
  68                 return buffer;
  69         }
  70
  71         private static String changeLineDelimiter(String code, String lineDelim) {
  72                 try {
  73                         ILineTracker tracker= new DefaultLineTracker();
  74                         tracker.set(code);
  75                         int nLines= tracker.getNumberOfLines();
  76                         if (nLines == 1) {
  77                                 return code;
  78                         }
  79
  80                         StringBuffer buf= new StringBuffer();
  81                         for (int i= 0; i < nLines; i++) {
  82                                 if (i != 0) {
  83                                         buf.append(lineDelim);
  84                                 }
  85                                 IRegion region = tracker.getLineInformation(i);
  86                                 String line= code.substring(region.getOffset(), region.getOffset() + region.getLength());
  87                                 buf.append(line);
  88                         }
  89                         return buf.toString();
  90                 } catch (BadLocationException e) {
  91                         // can not happen
  92                         return code;
  93                 }
  94         }
  95
  96         /* (non-Javadoc)
  97          * @see net.sourceforge.phpdt.internal.corext.template.TemplateContext#canEvaluate(net.sourceforge.phpdt.internal.corext.template.Template)
  98          */
  99         public boolean canEvaluate(Template template) {
 100                 return true;
 101         }
 102
 103         public void setCompilationUnitVariables(ICompilationUnit cu) {
 104                 setVariable(CodeTemplateContextType.FILENAME, cu.getElementName());
 105                 setVariable(CodeTemplateContextType.PACKAGENAME, cu.getParent().getElementName());
 106                 setVariable(CodeTemplateContextType.PROJECTNAME, cu.getJavaProject().getElementName());
 107         }
 108
 109 }