Implement more fixes.

pkg/analysis_services/lib/src/correction/util.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library services.src.correction.util;
 
 import 'package:analysis_services/src/correction/source_range.dart';
 import 'package:analysis_services/src/correction/strings.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
+import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/resolver.dart';
 import 'package:analyzer/src/generated/source.dart';
 
 
 String getDefaultValueCode(DartType type) {
   if (type != null) {
     String typeName = type.displayName;
     if (typeName == "bool") {
       return "false";
     }
     if (typeName == "int") {
       return "0";
     }
     if (typeName == "double") {
       return "0.0";
     }
     if (typeName == "String") {
       return "''";
     }
   }
   // no better guess
   return "null";
 }
 
 
 /**
+ * @return the [ExecutableElement] of the enclosing executable [AstNode].
+ */
+ExecutableElement getEnclosingExecutableElement(AstNode node) {
+  while (node != null) {
+    if (node is FunctionDeclaration) {
+      return node.element;
+    }
+    if (node is ConstructorDeclaration) {
+      return node.element;
+    }
+    if (node is MethodDeclaration) {
+      return node.element;
+    }
+    node = node.parent;
+  }
+  return null;
+}
+
+
+/**
  * Returns [getExpressionPrecedence] for the parent of [node],
  * or `0` if the parent node is [ParenthesizedExpression].
  *
  * The reason is that `(expr)` is always executed after `expr`.
  */
 int getExpressionParentPrecedence(AstNode node) {
   AstNode parent = node.parent;
   if (parent is ParenthesizedExpression) {
     return 0;
   }
@@ skipping 14 matching lines @@
 
 /**
  * Returns the namespace of the given [ImportElement].
  */
 Map<String, Element> getImportNamespace(ImportElement imp) {
   NamespaceBuilder builder = new NamespaceBuilder();
   Namespace namespace = builder.createImportNamespaceForDirective(imp);
   return namespace.definedNames;
 }
 
+/**
+ * If given [AstNode] is name of qualified property extraction, returns target from which
+ * this property is extracted. Otherwise `null`.
+ */
+Expression getQualifiedPropertyTarget(AstNode node) {
+  AstNode parent = node.parent;
+  if (parent is PrefixedIdentifier) {
+    PrefixedIdentifier prefixed = parent;
+    if (identical(prefixed.identifier, node)) {
+      return parent.prefix;
+    }
+  }
+  if (parent is PropertyAccess) {
+    PropertyAccess access = parent;
+    if (identical(access.propertyName, node)) {
+      return access.realTarget;
+    }
+  }
+  return null;
+}
+
+
+/**
+ * Returns the [String] content of the given [Source].
+ */
+String getSourceContent(AnalysisContext context, Source source) {
+  return context.getContents(source).data;
+}
 
 class CorrectionUtils {
   final CompilationUnit unit;
 
   LibraryElement _library;
   String _buffer;
   String _endOfLine;
 
   CorrectionUtils(this.unit) {
     CompilationUnitElement unitElement = unit.element;
     this._library = unitElement.library;
     this._buffer = unitElement.context.getContents(unitElement.source).data;
   }
 
   /**
    * Returns the EOL to use for this [CompilationUnit].
    */
   String get endOfLine {
     if (_endOfLine == null) {
       if (_buffer.contains("\r\n")) {
         _endOfLine = "\r\n";
       } else {
         _endOfLine = "\n";
       }
     }
     return _endOfLine;
   }
 
   /**
+   * Returns the actual type source of the given [Expression], may be `null`
+   * if can not be resolved, should be treated as the `dynamic` type.
+   */
+  String getExpressionTypeSource(Expression expression) {
+    if (expression == null) {
+      return null;
+    }
+    DartType type = expression.bestType;
+    if (type.isDynamic) {
+      return null;
+    }
+    return getTypeSource(type);
+  }
+
+  /**
+   * Returns the indentation with the given level.
+   */
+  String getIndent(int level) => repeat('  ', level);
+
+  /**
    * Skips whitespace characters and single EOL on the right from [index].
    *
    * If [index] the end of a statement or method, then in the most cases it is
    * a start of the next line.
    */
   int getLineContentEnd(int index) {
     int length = _buffer.length;
     // skip whitespace characters
     while (index < length) {
       int c = _buffer.codeUnitAt(index);
@@ skipping 25 matching lines @@
       int c = _buffer.codeUnitAt(index - 1);
       if (!isSpace(c)) {
         break;
       }
       index--;
     }
     return index;
   }
 
   /**
+   * Returns the whitespace prefix of the line which contains given offset.
+   */
+  String getLinePrefix(int index) {
+    int lineStart = getLineThis(index);
+    int length = _buffer.length;
+    int lineNonWhitespace = lineStart;
+    while (lineNonWhitespace < length) {
+      int c = _buffer.codeUnitAt(lineNonWhitespace);
+      if (c == 0xD || c == 0xA) {
+        break;
+      }
+      if (!isWhitespace(c)) {
+        break;
+      }
+      lineNonWhitespace++;
+    }
+    return getText2(lineStart, lineNonWhitespace - lineStart);
+  }
+
+  /**
+   * Returns the start index of the line which contains given index.
+   */
+  int getLineThis(int index) {
+    while (index > 0) {
+      int c = _buffer.codeUnitAt(index - 1);
+      if (c == 0xD || c == 0xA) {
+        break;
+      }
+      index--;
+    }
+    return index;
+  }
+
+  /**
    * Returns a [SourceRange] that covers [range] and extends (if possible) to
    * cover whole lines.
    */
   SourceRange getLinesRange(SourceRange range) {
     // start
     int startOffset = range.offset;
     int startLineOffset = getLineContentStart(startOffset);
     // end
     int endOffset = range.end;
     int afterEndLineOffset = getLineContentEnd(endOffset);
     // range
     return rangeStartEnd(startLineOffset, afterEndLineOffset);
   }
 
   /**
+   * Returns the line prefix consisting of spaces and tabs on the left from the given
+   *         [AstNode].
+   */
+  String getNodePrefix(AstNode node) {
+    int offset = node.offset;
+    // function literal is special, it uses offset of enclosing line
+    if (node is FunctionExpression) {
+      return getLinePrefix(offset);
+    }
+    // use just prefix directly before node
+    return getPrefix(offset);
+  }
+
+  /**
    * @return the source for the parameter with the given type and name.
    */
   String getParameterSource(DartType type, String name) {
     // no type
     if (type == null || type.isDynamic) {
       return name;
     }
     // function type
     if (type is FunctionType) {
       FunctionType functionType = type;
@@ skipping 18 matching lines @@
       }
       sb.write(')');
       // done
       return sb.toString();
     }
     // simple type
     return "${getTypeSource(type)} ${name}";
   }
 
   /**
-   * Returns the actual type source of the given [Expression], may be `null`
-   * if can not be resolved, should be treated as the `dynamic` type.
+   * Returns the line prefix consisting of spaces and tabs on the left from the
+   * given offset.
    */
-  String getExpressionTypeSource(Expression expression) {
-    if (expression == null) {
-      return null;
-    }
-    DartType type = expression.bestType;
-    String typeSource = getTypeSource(type);
-    if ("dynamic" == typeSource) {
-      return null;
-    }
-    return typeSource;
+  String getPrefix(int endIndex) {
+    int startIndex = getLineContentStart(endIndex);
+    return _buffer.substring(startIndex, endIndex);
   }
 
   /**
+   * Returns the text of the given [AstNode] in the unit.
+   */
+  String getText(AstNode node) => getText2(node.offset, node.length);
+
+  /**
+   * Returns the text of the given range in the unit.
+   */
+  String getText2(int offset, int length) =>
+      _buffer.substring(offset, offset + length);
+
+  /**
    * Returns the source to reference [type] in this [CompilationUnit].
    */
   String getTypeSource(DartType type) {
     StringBuffer sb = new StringBuffer();
     // prepare element
     Element element = type.element;
     if (element == null) {
       String source = type.toString();
       source = source.replaceAll('<dynamic>', '');
       source = source.replaceAll('<dynamic, dynamic>', '');
@@ skipping 46 matching lines @@
   ImportElement _getImportElement(Element element) {
     for (ImportElement imp in _library.imports) {
       Map<String, Element> definedNames = getImportNamespace(imp);
       if (definedNames.containsValue(element)) {
         return imp;
       }
     }
     return null;
   }
 }