Get rid of System classes for backend generators.

lib/html/scripts/dartdomgenerator.py

 #!/usr/bin/python
 # Copyright (c) 2011, 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 is the entry point to create Dart APIs from the IDL database."""
 
 import dartgenerator
 import database
 import logging.config
 import multiemitter
 import optparse
 import os
 import shutil
 import subprocess
 import sys
 from generator import TypeRegistry
 from htmlrenamer import HtmlRenamer
 from systembase import GeneratorOptions
 from systemdart2js import Dart2JSSystem
 from systemhtml import DartLibraryEmitter, HtmlInterfacesSystem,\
-                       HtmlDart2JSSystem
+                       Dart2JSBackend
 from systeminterface import InterfacesSystem
-from systemnative import CPPLibraryEmitter, NativeImplementationSystem
+from systemnative import CPPLibraryEmitter, DartiumBackend
 from templateloader import TemplateLoader
 
 _logger = logging.getLogger('dartdomgenerator')
 
 _webkit_renames = {
     # W3C -> WebKit name conversion
     # TODO(vsm): Maybe Store these renames in the IDLs.
     'ApplicationCache': 'DOMApplicationCache',
     'BarProp': 'BarInfo',
     'DedicatedWorkerGlobalScope': 'DedicatedWorkerContext',
@@ skipping 28 matching lines @@
                              exclude_suppressed = ['WebKit', 'Dart'])
   generator.RenameTypes(webkit_database, _webkit_renames, True)
   generator.FixEventTargets(webkit_database)
   generator.AddMissingArguments(webkit_database)
 
   emitters = multiemitter.MultiEmitter()
   renamer = HtmlRenamer(webkit_database)
   type_registry = TypeRegistry(webkit_database, renamer)
 
   def RunGenerator(dart_library_template, dart_output_dir, dart_library_path,
-               backend):
-    template_loader = TemplateLoader(
-        template_dir, ['html/interface', 'html/impl', 'html', ''], {})
+                   template_loader, backend_factory):
     options = GeneratorOptions(
         template_loader, webkit_database, type_registry, renamer)
     dart_library_emitter = DartLibraryEmitter(
         emitters, dart_library_template, dart_output_dir)
-    html_system = HtmlInterfacesSystem(options, dart_library_emitter, backend)
+    html_system = HtmlInterfacesSystem(
+        options, dart_library_emitter, backend_factory)
     generator.Generate(
         webkit_database, html_system, common_database, _webkit_renames)
     dart_library_emitter.EmitLibrary(dart_library_path, auxiliary_dir)
 
   if dart2js_output_dir:
+    template_paths = ['html/dart2js', 'html/impl', 'html/interface', '']
     template_loader = TemplateLoader(template_dir,
-                                     ['html/dart2js', 'html/impl', 'html', ''],
+                                     template_paths,
                                      {'DARTIUM': False, 'DART2JS': True})
     backend_options = GeneratorOptions(
         template_loader, webkit_database, type_registry, renamer)
-    backend = HtmlDart2JSSystem(backend_options)
+    backend_factory = lambda interface:\
+        Dart2JSBackend(interface, backend_options)
 
     dart_library_template = template_loader.Load('html_dart2js.darttemplate')
     dart_output_dir = os.path.join(dart2js_output_dir, 'dart')
     dart_library_path = os.path.join(dart2js_output_dir, 'html_dart2js.dart')
 
-    RunGenerator(
-        dart_library_template, dart_output_dir, dart_library_path, backend)
+    RunGenerator(dart_library_template, dart_output_dir, dart_library_path,
+                 template_loader, backend_factory)
 
   if dartium_output_dir:
+    template_paths = ['html/dartium', 'html/impl', 'html/interface', '']
     template_loader = TemplateLoader(template_dir,
-                                     ['html/dartium', 'html/impl', ''],
+                                     template_paths,
                                      {'DARTIUM': True, 'DART2JS': False})
     backend_options = GeneratorOptions(
         template_loader, webkit_database, type_registry, renamer)
     cpp_output_dir = os.path.join(dartium_output_dir, 'cpp')
     cpp_library_emitter = CPPLibraryEmitter(emitters, cpp_output_dir)
-    backend = NativeImplementationSystem(backend_options, cpp_library_emitter)
+    backend_factory = lambda interface:\
+        DartiumBackend(interface, cpp_library_emitter, backend_options)
 
     dart_library_template = template_loader.Load('html_dartium.darttemplate')
     dart_output_dir = os.path.join(dartium_output_dir, 'dart')
     dart_library_path = os.path.join(dartium_output_dir, 'html_dartium.dart')
 
-    RunGenerator(
-        dart_library_template, dart_output_dir, dart_library_path, backend)
+    RunGenerator(dart_library_template, dart_output_dir, dart_library_path,
+                 template_loader, backend_factory)
     cpp_library_emitter.EmitDerivedSources(
         template_loader.Load('cpp_derived_sources.template'),
         dartium_output_dir)
     cpp_library_emitter.EmitResolver(
         template_loader.Load('cpp_resolver.template'), dartium_output_dir)
 
   _logger.info('Flush...')
   emitters.Flush()
 
 def GenerateSingleFile(library_path, output_dir):
@@ skipping 42 matching lines @@
     _logger.info('Copy html_dart2js to dart2js/')
     GenerateSingleFile(os.path.join(dart2js_output_dir, 'html_dart2js.dart'),
                        '../dart2js')
   if 'htmldartium' in systems:
     _logger.info('Copy html_dartium to dartium/')
     GenerateSingleFile(os.path.join(dartium_output_dir, 'html_dartium.dart'),
                        '../dartium')
 
 if __name__ == '__main__':
   sys.exit(main())