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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.phpeclipse.PHPeclipsePlugin;
  18
  19 import org.eclipse.jface.text.BadLocationException;
  20 import org.eclipse.jface.text.DefaultLineTracker;
  21 import org.eclipse.jface.text.ILineTracker;
  22 import org.eclipse.jface.text.IRegion;
  23 import org.eclipse.jface.text.templates.Template;
  24 import org.eclipse.jface.text.templates.TemplateBuffer;
  25 import org.eclipse.jface.text.templates.TemplateContext;
  26 import org.eclipse.jface.text.templates.TemplateException;
  27 import org.eclipse.jface.text.templates.TemplateTranslator;
  28 import org.eclipse.jface.text.templates.TemplateVariableResolver;
  29
  30 public class CodeTemplateContext extends TemplateContext {
  31
  32         private String fLineDelimiter;
  33
  34         private IJavaProject fProject;
  35
  36         public CodeTemplateContext(String contextTypeName, IJavaProject project,
  37                         String lineDelim) {
  38                 super(PHPeclipsePlugin.getDefault().getCodeTemplateContextRegistry()
  39                                 .getContextType(contextTypeName));
  40                 fLineDelimiter = lineDelim;
  41                 fProject = project;
  42         }
  43
  44         public IJavaProject getJavaProject() {
  45                 return fProject;
  46         }
  47
  48         /*
  49          * @see net.sourceforge.phpdt.internal.corext.template.TemplateContext#evaluate(net.sourceforge.phpdt.internal.corext.template.Template)
  50          */
  51         public TemplateBuffer evaluate(Template template)
  52                         throws BadLocationException, TemplateException {
  53                 // test that all variables are defined
  54                 Iterator iterator = getContextType().resolvers();
  55                 while (iterator.hasNext()) {
  56                         TemplateVariableResolver var = (TemplateVariableResolver) iterator
  57                                         .next();
  58                         if (var instanceof CodeTemplateContextType.CodeTemplateVariableResolver) {
  59                                 // Assert.isNotNull(getVariable(var.getType()), "Variable " +
  60                                 // var.getType() + "not defined"); //$NON-NLS-1$ //$NON-NLS-2$
  61                         }
  62                 }
  63
  64                 if (!canEvaluate(template))
  65                         return null;
  66
  67                 String pattern = changeLineDelimiter(template.getPattern(),
  68                                 fLineDelimiter);
  69
  70                 TemplateTranslator translator = new TemplateTranslator();
  71                 TemplateBuffer buffer = translator.translate(pattern);
  72                 getContextType().resolve(buffer, this);
  73
  74                 return buffer;
  75         }
  76
  77         private static String changeLineDelimiter(String code, String lineDelim) {
  78                 try {
  79                         ILineTracker tracker = new DefaultLineTracker();
  80                         tracker.set(code);
  81                         int nLines = tracker.getNumberOfLines();
  82                         if (nLines == 1) {
  83                                 return code;
  84                         }
  85
  86                         StringBuffer buf = new StringBuffer();
  87                         for (int i = 0; i < nLines; i++) {
  88                                 if (i != 0) {
  89                                         buf.append(lineDelim);
  90                                 }
  91                                 IRegion region = tracker.getLineInformation(i);
  92                                 String line = code.substring(region.getOffset(), region
  93                                                 .getOffset()
  94                                                 + region.getLength());
  95                                 buf.append(line);
  96                         }
  97                         return buf.toString();
  98                 } catch (BadLocationException e) {
  99                         // can not happen
 100                         return code;
 101                 }
 102         }
 103
 104         /*
 105          * (non-Javadoc)
 106          *
 107          * @see net.sourceforge.phpdt.internal.corext.template.TemplateContext#canEvaluate(net.sourceforge.phpdt.internal.corext.template.Template)
 108          */
 109         public boolean canEvaluate(Template template) {
 110                 return true;
 111         }
 112
 113         public void setCompilationUnitVariables(ICompilationUnit cu) {
 114                 setVariable(CodeTemplateContextType.FILENAME, cu.getElementName());
 115                 setVariable(CodeTemplateContextType.PACKAGENAME, cu.getParent()
 116                                 .getElementName());
 117                 setVariable(CodeTemplateContextType.PROJECTNAME, cu.getJavaProject()
 118                                 .getElementName());
 119         }
 120
 121         public void setFileNameVariable(String filename, String projectname) {
 122                 setVariable(CodeTemplateContextType.FILENAME, filename);
 123                 setVariable(CodeTemplateContextType.PROJECTNAME, projectname);
 124         }
 125 }