Examples of org.eclipse.text.edits.TextEdit

org.eclipse.text.edits.TextEdit
A text edit describes an elementary text manipulation operation. Edits are executed by applying them to a document (e.g. an instance of IDocument ).
Text edits form a tree. Clients can navigate the tree upwards, from child to parent, as well as downwards. Newly created edits are un-parented. New edits are added to the tree by calling one of the add methods on a parent edit.

An edit tree is well formed in the following sense:
- a parent edit covers all its children
- children don't overlap
- an edit with length 0 can't have any children
Any manipulation of the tree that violates one of the above requirements results in a MalformedTreeException.

Insert edits are represented by an edit of length 0. If more than one insert edit exists at the same offset then the edits are executed in the order in which they have been added to a parent. The following code example:
```
 IDocument document= new Document("org"); MultiTextEdit edit= new MultiTextEdit(); edit.addChild(new InsertEdit(0, "www.")); edit.addChild(new InsertEdit(0, "eclipse.")); edit.apply(document); 
```
therefore results in string: "www.eclipse.org".

Text edits can be executed in a mode where the edit's region is updated to reflect the edit's position in the changed document. Region updating is enabled by default or can be requested by passing UPDATE_REGIONS to the {@link #apply(IDocument,int) apply(IDocument, int)} method. In the above examplethe region of the InsertEdit(0, "eclipse.") edit after executing the root edit is [3, 8]. If the region of an edit got deleted during change execution the region is set to [-1, -1] and the method {@link #isDeleted() isDeleted} returns true.
This class isn't intended to be subclassed outside of the edit framework. Clients are only allowed to subclass MultiTextEdit. @since 3.0 @noextend This class is not intended to be subclassed by clients.

      FindReplaceDocumentAdapter find = new FindReplaceDocumentAdapter(doc);
      IRegion resultStart = find.find(0, "location\\s*=\\s*\"", true, true, false, true);
      IRegion resultStop = find.find(resultStart.getOffset() + resultStart.getLength(), "\"", true, true, false, false);
  
      String linkTarget = WGADesignStructureHelper.computeDirLinkTarget(info.getFile().getParent(), computeNewLinkTarget(info));
      TextEdit edit = new ReplaceEdit(resultStart.getLength() + resultStart.getOffset(), resultStop.getOffset() - (resultStart.getLength() + resultStart.getOffset()), linkTarget);
      
      change.setEdit(edit);
      return change;
      }else if (info.getArguments() instanceof DeleteArguments) {
        // check if resource to delete will still exists after parent deletion is performed - otherwise we can skip any change here

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        options.put(JavaCore.COMPILER_SOURCE, JavaCore.VERSION_1_5);
        options.put(JavaCore.COMPILER_COMPLIANCE, JavaCore.VERSION_1_5);
        Document doc = new Document(m_compilationUnit.toString());
        CodeFormatter fmtr = ToolFactory.createCodeFormatter(options);
        String text = doc.get();
        TextEdit edits = fmtr.format(CodeFormatter.K_COMPILATION_UNIT, text, 0, text.length(), 0, null);
        File gendir = m_package.getGenerateDirectory();
        if (gendir != null) {
            try {
                File file = new File(gendir, m_name + ".java");
                FileWriter fwrit = new FileWriter(file);
                WriterVisitor visitor = new WriterVisitor(text, fwrit);
                edits.accept(visitor);
                visitor.finish();
                fwrit.flush();
                fwrit.close();
                s_logger.info("Generated class file " + file.getCanonicalPath() + " (writing AST took " + (System.currentTimeMillis()-start) + " ms.)");
            } catch (IOException e) {

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    }
    this.preferences.initial_indentation_level = indentationLevel;


    this.newCodeFormatter = new CodeFormatterVisitor(this.preferences, this.options, offset, length, this.codeSnippetParsingUtil);
    
    TextEdit textEdit = this.newCodeFormatter.format(source, expression);
    return textEdit;
  }

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    for (int i= 0; i < markers.length; i++) {
      resultingMarkers.add(markers[i]); // add to result
    }    
    
    String unformatted= flattener.getResult();
    TextEdit edit= formatNode(node, unformatted, initialIndentationLevel);
    if (edit == null) {
        if (initialIndentationLevel > 0) {
            // at least correct the indent
            String indentString = createIndentString(initialIndentationLevel);
        ReplaceEdit[] edits = IndentManipulation.getChangeIndentEdits(unformatted, 0, this.tabWidth, this.indentWidth, indentString);
        edit= new MultiTextEdit();
        edit.addChild(new InsertEdit(0, indentString));
        edit.addChildren(edits);
        } else {
           return unformatted;
        }
    }
    return evaluateFormatterEdit(unformatted, edit, markers);

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          return null;
      }
    }
    
    String concatStr= prefix + str + suffix;
    TextEdit edit= formatString(code, concatStr, prefix.length(), str.length(), indentationLevel);
    
    if (prefix.length() > 0) {
      edit= shifEdit(edit, prefix.length());
    }    
    return edit;

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    }    
    return edit;
  }  
      
  private static TextEdit shifEdit(TextEdit oldEdit, int diff) {
    TextEdit newEdit;
    if (oldEdit instanceof ReplaceEdit) {
      ReplaceEdit edit= (ReplaceEdit) oldEdit;
      newEdit= new ReplaceEdit(edit.getOffset() - diff, edit.getLength(), edit.getText());
    } else if (oldEdit instanceof InsertEdit) {
      InsertEdit edit= (InsertEdit) oldEdit;
      newEdit= new InsertEdit(edit.getOffset() - diff,  edit.getText());
    } else if (oldEdit instanceof DeleteEdit) {
      DeleteEdit edit= (DeleteEdit) oldEdit;
      newEdit= new DeleteEdit(edit.getOffset() - diff,  edit.getLength());
    } else if (oldEdit instanceof MultiTextEdit) {
      newEdit= new MultiTextEdit();      
    } else {
      return null; // not supported
    }
    TextEdit[] children= oldEdit.getChildren();
    for (int i= 0; i < children.length; i++) {
      TextEdit shifted= shifEdit(children[i], diff);
      if (shifted != null) {
        newEdit.addChild(shifted);
      }
    }
    return newEdit;

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    }
    
    public String getPrefix(int indent) {
      Position pos= new Position(this.start, this.length);
      String str= this.string;
      TextEdit res= formatString(this.kind, str, 0, str.length(), indent);
      if (res != null) {
        str= evaluateFormatterEdit(str, res, new Position[] { pos });
      }
      return str.substring(pos.offset + 1, pos.offset + pos.length - 1);
    }

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    public String[] getPrefixAndSuffix(int indent, ASTNode node, RewriteEventStore events) {
      String nodeString= ASTRewriteFlattener.asString(node, events);
      String str= this.prefix + nodeString;
      Position pos= new Position(this.start, this.prefix.length() + 1 - this.start);


      TextEdit res= formatString(CodeFormatter.K_STATEMENTS, str, 0, str.length(), indent);
      if (res != null) {
        str= evaluateFormatterEdit(str, res, new Position[] { pos });
      }
      return new String[] { str.substring(pos.offset + 1, pos.offset + pos.length - 1), ""}; //$NON-NLS-1$
    }

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      String str= this.prefix + nodeString + this.suffix;
      
      Position pos1= new Position(this.start, nodeStart + 1 - this.start);
      Position pos2= new Position(nodeEnd, 2);


      TextEdit res= formatString(CodeFormatter.K_STATEMENTS, str, 0, str.length(), indent);
      if (res != null) {
        str= evaluateFormatterEdit(str, res, new Position[] { pos1, pos2 });
      }
      return new String[] {
        str.substring(pos1.offset + 1, pos1.offset + pos1.length - 1),

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   * @param snippet the code snippet
   * @return the formatted code snippet
   */
  private String formatCodeSnippet(String snippet) {
    String lineDelimiter= TextUtilities.getDefaultLineDelimiter(getDocument());
    TextEdit edit= CommentFormatterUtil.format2(CodeFormatter.K_UNKNOWN, snippet, 0, lineDelimiter, this.preferences.getMap());
    if (edit != null)
      snippet= CommentFormatterUtil.evaluateFormatterEdit(snippet, edit, null);
    return snippet;
  }

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