net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/corext/template/php/CodeTemplateContext.java

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