Refactor analysis server code generation to re-use logic from analyzer.

pkg/analysis_server/tool/spec/from_html.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.
 
 /**
  * Code for reading an HTML API description.
  */
 library from.html;
 
 import 'dart:io';
 
+import 'package:analyzer/src/codegen/html.dart';
 import 'package:html/dom.dart' as dom;
 import 'package:html/parser.dart' as parser;
+import 'package:path/path.dart';
 
 import 'api.dart';
-import 'html_tools.dart';
 
 const List<String> specialElements = const [
   'domain',
   'feedback',
   'object',
   'refactorings',
   'refactoring',
   'type',
   'types',
   'request',
@@ skipping 253 matching lines @@
       checkAttributes(child, ['field'], context);
       String field = child.attributes['field'];
       types.add(
           new TypeUnion(processContentsAsTypes(child, context), field, child));
     }
   });
   return types;
 }
 
 /**
- * Read the API description from the file 'spec_input.html'.
+ * Read the API description from the file 'spec_input.html'.  [pkgPath] is the
+ * path to the current package.
  */
-Api readApi() {
-  File htmlFile = new File('spec_input.html');
+Api readApi(String pkgPath) {
+  File htmlFile = new File(join(pkgPath, 'tool', 'spec', 'spec_input.html'));
   String htmlContents = htmlFile.readAsStringSync();
   dom.Document document = parser.parse(htmlContents);
   dom.Element htmlElement = document.children
       .singleWhere((element) => element.localName.toLowerCase() == 'html');
   return apiFromHtml(htmlElement);
 }
 
 void recurse(dom.Element parent, String context,
     Map<String, ElementProcessor> elementProcessors) {
   for (String key in elementProcessors.keys) {
@@ skipping 234 matching lines @@
       TypeDefinition typeDefinition = typeDefinitionFromHtml(child);
       types[typeDefinition.name] = typeDefinition;
     }
   });
   return new Types(types, html);
 }
 
 typedef void ElementProcessor(dom.Element element);
 
 typedef void TextProcessor(dom.Text text);