Lazy load chrome.* APIs

chrome/renderer/extensions/module_system.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_RENDERER_EXTENSIONS_MODULE_SYSTEM_H_
 #define CHROME_RENDERER_EXTENSIONS_MODULE_SYSTEM_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 68 matching lines @@
   // Calls the specified method exported by the specified module. This is
   // equivalent to calling require('module_name').method_name() from JS.
   void CallModuleMethod(const std::string& module_name,
                         const std::string& method_name);
 
   // Register |native_handler| as a potential target for requireNative(), so
   // calls to requireNative(|name|) from JS will return a new object created by
   // |native_handler|.
   void RegisterNativeHandler(const std::string& name,
                              scoped_ptr<NativeHandler> native_handler);
+  bool HasNativeHandler(const std::string& name);
 
   // Causes requireNative(|name|) to look for its module in |source_map_|
   // instead of using a registered native handler. This can be used in unit
   // tests to mock out native modules.
   void OverrideNativeHandler(const std::string& name);
 
   // Executes |code| in the current context with |name| as the filename.
   void RunString(const std::string& code, const std::string& name);
 
   // Retrieves the lazily defined field specified by |property|.
   static v8::Handle<v8::Value> LazyFieldGetter(v8::Local<v8::String> property,
                                                const v8::AccessorInfo& info);
 
   // Make |object|.|field| lazily evaluate to the result of
+  // require(|module_name|)[|module_field|](|arg|).

[not at google - send to devlin, 2012/12/13 22:26:40]

This is pretty cool, though see comment in schema_generated_native_handler - I
was hoping that the act of requiring a module like 'alarms' would eventually
call into NewInstance there, which could do the function calling itself (set up
arguments etc).

+  void SetLazyField(v8::Handle<v8::Object> object,
+                    const std::string& field,
+                    const std::string& module_name,
+                    const std::string& module_field,
+                    const std::string& arg);
+
+  // Make |object|.|field| lazily evaluate to the result of
   // require(|module_name|)[|module_field|].
   void SetLazyField(v8::Handle<v8::Object> object,
                     const std::string& field,
                     const std::string& module_name,
                     const std::string& module_field);
 
   void set_exception_handler(scoped_ptr<ExceptionHandler> handler) {
     exception_handler_ = handler.Pass();
   }
 
  private:
   typedef std::map<std::string, linked_ptr<NativeHandler> > NativeHandlerMap;
 
   // Called when an exception is thrown but not caught.
   void HandleException(const v8::TryCatch& try_catch);
 
   // Ensure that require_ has been evaluated from require.js.
   void EnsureRequireLoaded();
 
   // Run |code| in the current context with the name |name| used for stack
   // traces.
   v8::Handle<v8::Value> RunString(v8::Handle<v8::String> code,
                                   v8::Handle<v8::String> name);
 
+  // Call |value| with arguments |argv| and return the result.
+  v8::Handle<v8::Value> CallModuleMethod(v8::Local<v8::Value> value,
+                                         int argc,
+                                         v8::Handle<v8::Value> argv[]);
+
+
   // Return the named source file stored in the source map.
   // |args[0]| - the name of a source file in source_map_.
   v8::Handle<v8::Value> GetSource(v8::Handle<v8::String> source_name);
 
   // Return an object that contains the native methods defined by the named
   // NativeHandler.
   // |args[0]| - the name of a native handler object.
   v8::Handle<v8::Value> GetNative(const v8::Arguments& args);
 
   // Wraps |source| in a (function(require, requireNative, exports) {...}).
@@ skipping 20 matching lines @@
   scoped_ptr<ExceptionHandler> exception_handler_;
 
   std::set<std::string> overridden_native_handlers_;
 
   DISALLOW_COPY_AND_ASSIGN(ModuleSystem);
 };
 
 }  // extensions
 
 #endif  // CHROME_RENDERER_EXTENSIONS_MODULE_SYSTEM_H_