chrome/renderer/extensions/id_generator_custom_bindings.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/renderer/extensions/id_generator_custom_bindings.h"
   6
   7 #include "base/bind.h"
   8 #include "grit/renderer_resources.h"
   9 #include "v8/include/v8.h"
  10
  11 namespace extensions {
  12
  13 IdGeneratorCustomBindings::IdGeneratorCustomBindings(Dispatcher* dispatcher,
  14                                                      ChromeV8Context* context)
  15     : ChromeV8Extension(dispatcher, context) {
  16   RouteFunction("GetNextId", base::Bind(&IdGeneratorCustomBindings::GetNextId,
  17                                         base::Unretained(this)));
  18 }
  19
  20 void IdGeneratorCustomBindings::GetNextId(
  21     const v8::FunctionCallbackInfo<v8::Value>& args) {
  22   static int32_t next_id = 0;
  23   ++next_id;
  24   // Make sure 0 is never returned because some APIs (particularly WebRequest)
  25   // have special meaning for 0 IDs.
  26   if (next_id == 0)
  27     next_id = 1;
  28   args.GetReturnValue().Set(next_id);
  29 }
  30
  31 }  // namespace extensions