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.

  }


  public TextEdit format(IStructuredModel model, int start, int length, XMLFormattingPreferences preferences) {
    setFormattingPreferences(preferences);


    TextEdit edit = new MultiTextEdit();
    IStructuredDocument document = model.getStructuredDocument();
    // get initial document region
    IStructuredDocumentRegion currentRegion = document.getRegionAtCharacterOffset(start);
    if (currentRegion != null) {
      int startOffset = currentRegion.getStartOffset();

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    int availableLineWidth;
    String indentString = getIndentString(indentLevel);
    String lineDelimiter = getLineDelimiter(currentRegion);
    String newLineAndIndent = lineDelimiter + indentString;
    
    TextEdit indentation = null;
    
    // if not already correctly indented
    if (!newLineAndIndent.equals(whitespaceRun)) {
      if (getFormattingPreferences().getClearAllBlankLines()) {
        if (whitespaceRun != null) {

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      if (formatSource) {
        buffer.replace(pos, 0, sw.toString());
        String builderSource = buffer.getContents();
      
        TextEdit text = ToolFactory.createCodeFormatter(null).format(CodeFormatter.K_COMPILATION_UNIT, builderSource, 0, builderSource.length(), 0, "\n");
        // text is null if source cannot be formatted
        if (text != null) {
          Document simpleDocument = new Document(builderSource);
          text.apply(simpleDocument);
          buffer.setContents(simpleDocument.get());
        } 
      } else {
        buffer.replace(pos, 0, sw.toString());  
      }

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  public boolean formatFile(File file) throws ExporterException {
    IDocument doc = new Document();
    try {
      String contents = new String(org.eclipse.jdt.internal.compiler.util.Util.getFileCharContent(file, null));
      doc.set(contents);
      TextEdit edit = codeFormatter.format(CodeFormatter.K_COMPILATION_UNIT, contents, 0, contents.length(), 0, null);
      if (edit != null) {
        edit.apply(doc);
      } else {        
        return false; // most likely syntax errror
      }


      // write the file

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        if (!success)
          return null;
        removeRemovedComponent(root, monitor, unit, type);
        createPreferredLnf(root, monitor, type, imports);
        if (success) {
          TextEdit edit = imports.rewriteImports(monitor);
          JavaUtil.applyEdit(copy, edit, true, monitor);
        }
        if (copy.isWorkingCopy()) {
          copy.commitWorkingCopy(true, monitor);
          copy.discardWorkingCopy();

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      TypeDeclaration typeDec = (TypeDeclaration) cunit.types().get(0);
      List list = typeDec.superInterfaceTypes();
      Name name = ast.newName(cName);
      Type interfaceType = ast.newSimpleType(name);
      list.add(interfaceType);
      TextEdit edits = cunit.rewrite(document, icunit.getJavaProject()
          .getOptions(true));
      edits.apply(document);
      String newSource = document.get();
      icunit.getBuffer().setContents(newSource);
    } catch (Exception e) {
      ParserPlugin.getLogger().error(e);
    }

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        DefaultCodeFormatterConstants.TRUE);


    // instantiate the default code formatter with the given options
    final CodeFormatter codeFormatter = ToolFactory
        .createCodeFormatter(options);
    final TextEdit editCode = codeFormatter.format(
        CodeFormatter.K_COMPILATION_UNIT
            | CodeFormatter.F_INCLUDE_COMMENTS, source, 0,
        source.length(), 0, System.getProperty("line.separator"));


    IDocument document = new Document(source);


    if (icu != null && document != null && editCode != null) {
      try {
        editCode.apply(document);
      } catch (MalformedTreeException e) {
        CrashReporter.reportException(e);
      } catch (BadLocationException e) {
        CrashReporter.reportException(e);
      }

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        DefaultCodeFormatterConstants.TRUE);


    // instantiate the default code formatter with the given options
    final CodeFormatter codeFormatter = ToolFactory
        .createCodeFormatter(options);
    final TextEdit editCode = codeFormatter.format(
        CodeFormatter.K_COMPILATION_UNIT
            | CodeFormatter.F_INCLUDE_COMMENTS, source, 0,
        source.length(), 0, System.getProperty("line.separator"));


    IDocument document = new Document(source);


    if (icu != null && document != null && editCode != null) {
      try {
        editCode.apply(document);
      } catch (MalformedTreeException e) {
        e.printStackTrace();
      } catch (BadLocationException e) {
        e.printStackTrace();
      }

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        DefaultCodeFormatterConstants.TRUE);


    // instantiate the default code formatter with the given options
    final CodeFormatter codeFormatter = ToolFactory
        .createCodeFormatter(options);
    final TextEdit editCode = codeFormatter.format(
        CodeFormatter.K_COMPILATION_UNIT
            | CodeFormatter.F_INCLUDE_COMMENTS, source, 0,
        source.length(), 0, System.getProperty("line.separator"));


    IDocument document = new Document(source);


    if (icu != null && document != null && editCode != null) {
      try {
        editCode.apply(document);
      } catch (MalformedTreeException e) {
        e.printStackTrace();
      } catch (BadLocationException e) {
        e.printStackTrace();
      }

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      String source = icu.getSource();
      Document document = new Document(source);


      // computation of the text edits
      TextEdit edits = rewrite.rewriteAST(document, icu.getJavaProject()
          .getOptions(true));


      // computation of the new source code
      if (edits != null) {
        edits.apply(document);
      }


      String newSource = document.get();


      // update of the compilation unit

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