Big merge from experimental to bleeding edge.

editor/tools/plugins/com.google.dart.tools.ui.web/src/com/google/dart/tools/ui/web/yaml/YamlAutoIndentStrategy.java

 /*
  * Copyright (c) 2012, the Dart project authors.
  * 
  * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
  * 
  * http://www.eclipse.org/legal/epl-v10.html
  * 
  * Unless required by applicable law or agreed to in writing, software distributed under the License
  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
  * or implied. See the License for the specific language governing permissions and limitations under
  * the License.
  */
 
 package com.google.dart.tools.ui.web.yaml;
 
-import com.google.dart.tools.ui.web.utils.WebEditorAutoIndentStrategy;
-
 import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.DefaultIndentLineAutoEditStrategy;
 import org.eclipse.jface.text.DocumentCommand;
 import org.eclipse.jface.text.IDocument;
 import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.TextUtilities;
 
 /**
  * An indent strategy for yaml.
  */
-class YamlAutoIndentStrategy extends WebEditorAutoIndentStrategy {
+public class YamlAutoIndentStrategy extends DefaultIndentLineAutoEditStrategy {
 
   public YamlAutoIndentStrategy() {
 
   }
 
   @Override
-  protected void doAutoIndentAfterNewLine(IDocument document, DocumentCommand command) {
-    if (command.offset == -1 || document.getLength() == 0) {
+  public void customizeDocumentCommand(IDocument d, DocumentCommand c) {
+    if (c.length == 0 && c.text != null
+        && TextUtilities.endsWith(d.getLegalLineDelimiters(), c.text) != -1) {
+      autoIndentAfterNewLine(d, c);
+    }
+  }
+
+  /**
+   * Copies the indentation of the previous line.
+   * 
+   * @param d the document to work on
+   * @param c the command to deal with
+   */
+  private void autoIndentAfterNewLine(IDocument d, DocumentCommand c) {
+    if (c.offset == -1 || d.getLength() == 0) {
       return;
     }
 
     try {
       // find start of line
-      int location = (command.offset == document.getLength() ? command.offset - 1 : command.offset);
-      IRegion lineInfo = document.getLineInformationOfOffset(location);
-      int start = lineInfo.getOffset();
+      int p = (c.offset == d.getLength() ? c.offset - 1 : c.offset);
+      IRegion info = d.getLineInformationOfOffset(p);
+      int start = info.getOffset();
 
-      boolean endsInColon = (document.getChar(command.offset - 1) == ':');
+      boolean endsInColon = (d.getChar(c.offset - 1) == ':');
 
       // find white spaces
-      int end = findEndOfWhiteSpace(document, start, command.offset);
+      int end = findEndOfWhiteSpace(d, start, c.offset);
 
-      StringBuffer buf = new StringBuffer(command.text);
+      StringBuffer buf = new StringBuffer(c.text);
 
       if (end > start) {
         // append to input
-        buf.append(document.get(start, end - start));
+        buf.append(d.get(start, end - start));
       }
 
       if (endsInColon) {
         buf.append("  ");
       }
 
-      command.text = buf.toString();
+      c.text = buf.toString();
     } catch (BadLocationException excp) {
       // stop work
     }
   }
 
 }