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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 import net.sourceforge.phpeclipse.ui.WebUI;
  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
  35         private IJavaProject fProject;
  36
  37         public CodeTemplateContext(String contextTypeName, IJavaProject project,
  38                         String lineDelim) {
  39                 super(WebUI.getDefault().getCodeTemplateContextRegistry()
  40                                 .getContextType(contextTypeName));
  41                 fLineDelimiter = lineDelim;
  42                 fProject = project;
  43         }
  44
  45         public IJavaProject getJavaProject() {
  46                 return fProject;
  47         }
  48
  49         /*
  50          * @see net.sourceforge.phpdt.internal.corext.template.TemplateContext#evaluate(net.sourceforge.phpdt.internal.corext.template.Template)
  51          */
  52         public TemplateBuffer evaluate(Template template)
  53                         throws BadLocationException, TemplateException {
  54                 // test that all variables are defined
  55                 Iterator iterator = getContextType().resolvers();
  56                 while (iterator.hasNext()) {
  57                         TemplateVariableResolver var = (TemplateVariableResolver) iterator
  58                                         .next();
  59                         if (var instanceof CodeTemplateContextType.CodeTemplateVariableResolver) {
  60                                 // Assert.isNotNull(getVariable(var.getType()), "Variable " +
  61                                 // var.getType() + "not defined"); //$NON-NLS-1$ //$NON-NLS-2$
  62                         }
  63                 }
  64
  65                 if (!canEvaluate(template))
  66                         return null;
  67
  68                 String pattern = changeLineDelimiter(template.getPattern(),
  69                                 fLineDelimiter);
  70
  71                 TemplateTranslator translator = new TemplateTranslator();
  72                 TemplateBuffer buffer = translator.translate(pattern);
  73                 getContextType().resolve(buffer, this);
  74
  75                 return buffer;
  76         }
  77
  78         private static String changeLineDelimiter(String code, String lineDelim) {
  79                 try {
  80                         ILineTracker tracker = new DefaultLineTracker();
  81                         tracker.set(code);
  82                         int nLines = tracker.getNumberOfLines();
  83                         if (nLines == 1) {
  84                                 return code;
  85                         }
  86
  87                         StringBuffer buf = new StringBuffer();
  88                         for (int i = 0; i < nLines; i++) {
  89                                 if (i != 0) {
  90                                         buf.append(lineDelim);
  91                                 }
  92                                 IRegion region = tracker.getLineInformation(i);
  93                                 String line = code.substring(region.getOffset(), region
  94                                                 .getOffset()
  95                                                 + region.getLength());
  96                                 buf.append(line);
  97                         }
  98                         return buf.toString();
  99                 } catch (BadLocationException e) {
 100                         // can not happen
 101                         return code;
 102                 }
 103         }
 104
 105         /*
 106          * (non-Javadoc)
 107          *
 108          * @see net.sourceforge.phpdt.internal.corext.template.TemplateContext#canEvaluate(net.sourceforge.phpdt.internal.corext.template.Template)
 109          */
 110         public boolean canEvaluate(Template template) {
 111                 return true;
 112         }
 113
 114         public void setCompilationUnitVariables(ICompilationUnit cu) {
 115                 setVariable(CodeTemplateContextType.FILENAME, cu.getElementName());
 116                 setVariable(CodeTemplateContextType.PACKAGENAME, cu.getParent()
 117                                 .getElementName());
 118                 setVariable(CodeTemplateContextType.PROJECTNAME, cu.getJavaProject()
 119                                 .getElementName());
 120         }
 121
 122         public void setFileNameVariable(String filename, String projectname) {
 123                 setVariable(CodeTemplateContextType.FILENAME, filename);
 124                 setVariable(CodeTemplateContextType.PROJECTNAME, projectname);
 125         }
 126 }