Replace isAppropriateFor with suitabilityFor and start using it

pkg/analyzer/lib/src/task/html.dart

 // Copyright (c) 2015, 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.
 
 library analyzer.src.task.html;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/context/cache.dart';
 import 'package:analyzer/src/generated/engine.dart';
@@ skipping 261 matching lines @@
    */
   static const String CONTENT_INPUT_NAME = 'CONTENT_INPUT_NAME';
 
   /**
    * The task descriptor describing this kind of task.
    */
   static final TaskDescriptor DESCRIPTOR = new TaskDescriptor(
       'ParseHtmlTask',
       createTask,
       buildInputs,
-      <ResultDescriptor>[HTML_DOCUMENT, HTML_DOCUMENT_ERRORS, LINE_INFO]);
+      <ResultDescriptor>[HTML_DOCUMENT, HTML_DOCUMENT_ERRORS, LINE_INFO],
+      suitabilityFor: suitabilityFor);
 
   /**
    * Initialize a newly created task to access the content of the source
    * associated with the given [target] in the given [context].
    */
   ParseHtmlTask(InternalAnalysisContext context, AnalysisTarget target)
       : super(context, target);
 
   @override
   TaskDescriptor get descriptor => DESCRIPTOR;
@@ skipping 58 matching lines @@
 
   /**
    * Create a [ParseHtmlTask] based on the given [target] in the given [context].
    */
   static ParseHtmlTask createTask(
       AnalysisContext context, AnalysisTarget target) {
     return new ParseHtmlTask(context, target);
   }
 
   /**
+   * Return an indication of how suitable this task is for the given [target].
+   */
+  static TaskSuitability suitabilityFor(AnalysisTarget target) {
+    if (target is Source) {
+      String name = target.shortName;
+      if (name.endsWith(AnalysisEngine.SUFFIX_HTML) ||
+          name.endsWith(AnalysisEngine.SUFFIX_HTM)) {
+        return TaskSuitability.HIGHEST;
+      }
+    }
+    return TaskSuitability.NONE;
+  }
+
+  /**
    * Compute [LineInfo] for the given [content].
    */
   static LineInfo _computeLineInfo(String content) {
     List<int> lineStarts = StringUtilities.computeLineStarts(content);
     return new LineInfo(lineStarts);
   }
 }
 
 /**
  * A fragment of a [DartScript].
@@ skipping 20 matching lines @@
    * The content of the fragment.
    */
   final String content;
 
   /**
    * Initialize a newly created script fragment to have the given [offset] and
    * [content].
    */
   ScriptFragment(this.offset, this.line, this.column, this.content);
 }