net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/corext/textmanipulation/SimpleTextEdit.java

   1 /*
   2  * (c) Copyright IBM Corp. 2000, 2001.
   3  * All Rights Reserved.
   4  */
   5 package net.sourceforge.phpdt.internal.corext.textmanipulation;
   6
   7 import org.eclipse.core.runtime.CoreException;
   8
   9 // import net.sourceforge.phpdt.internal.corext.Assert;
  10
  11 public abstract class SimpleTextEdit extends TextEdit {
  12
  13         private TextRange fRange;
  14
  15         private String fText;
  16
  17         public static SimpleTextEdit createReplace(int offset, int length,
  18                         String text) {
  19                 return new SimpleTextEditImpl(offset, length, text);
  20         }
  21
  22         public static SimpleTextEdit createInsert(int offset, String text) {
  23                 return new SimpleTextEditImpl(offset, 0, text);
  24         }
  25
  26         public static SimpleTextEdit createDelete(int offset, int length) {
  27                 return new SimpleTextEditImpl(offset, length, ""); //$NON-NLS-1$
  28         }
  29
  30         private final static class SimpleTextEditImpl extends SimpleTextEdit {
  31                 protected SimpleTextEditImpl(TextRange range, String text) {
  32                         super(range, text);
  33                 }
  34
  35                 protected SimpleTextEditImpl(int offset, int length, String text) {
  36                         super(offset, length, text);
  37                 }
  38
  39                 public TextEdit copy() {
  40                         return new SimpleTextEditImpl(getTextRange().copy(), getText());
  41                 }
  42         }
  43
  44         protected SimpleTextEdit() {
  45                 this(TextRange.UNDEFINED, ""); //$NON-NLS-1$
  46         }
  47
  48         protected SimpleTextEdit(int offset, int length, String text) {
  49                 this(new TextRange(offset, length), text);
  50         }
  51
  52         protected SimpleTextEdit(TextRange range, String text) {
  53                 // Assert.isNotNull(range);
  54                 // Assert.isNotNull(text);
  55                 fRange = range;
  56                 fText = text;
  57         }
  58
  59         /**
  60          * Returns the text edit's text
  61          *
  62          * @return the text edit's text
  63          */
  64         public String getText() {
  65                 return fText;
  66         }
  67
  68         /**
  69          * Sets the text edit's text
  70          * <p>
  71          * This method should only be called from within the <code>
  72          * connect</code>
  73          * method.
  74          *
  75          * @param text
  76          *            the text edit's text
  77          */
  78         protected final void setText(String text) {
  79                 fText = text;
  80                 // Assert.isNotNull(fText);
  81         }
  82
  83         /**
  84          * Sets the text edit's range.
  85          * <p>
  86          * This method should only be called from within the <code>
  87          * connect</code>
  88          * method.
  89          *
  90          * @param range
  91          *            the text edit's range.
  92          */
  93         protected void setTextRange(TextRange range) {
  94                 fRange = range;
  95                 // Assert.isNotNull(fRange);
  96         }
  97
  98         /*
  99          * non Java-doc
 100          *
 101          * @see TextEdit#getTextRange
 102          */
 103         public TextRange getTextRange() {
 104                 return fRange;
 105         }
 106
 107         /*
 108          * non Java-doc
 109          *
 110          * @see TextEdit#doPerform
 111          */
 112         public final TextEdit perform(TextBuffer buffer) throws CoreException {
 113                 String current = buffer.getContent(fRange.fOffset, fRange.fLength);
 114                 buffer.replace(fRange, fText);
 115                 return new SimpleTextEditImpl(fRange, current);
 116         }
 117 }