extensions/renderer/id_generator_custom_bindings.cc

   1 // Copyright 2014 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 "extensions/renderer/id_generator_custom_bindings.h"
   6
   7 #include "base/bind.h"
   8
   9 namespace extensions {
  10
  11 IdGeneratorCustomBindings::IdGeneratorCustomBindings(ScriptContext* context)
  12     : ObjectBackedNativeHandler(context) {
  13   RouteFunction("GetNextId",
  14                 base::Bind(&IdGeneratorCustomBindings::GetNextId,
  15                            base::Unretained(this)));
  16 }
  17
  18 void IdGeneratorCustomBindings::GetNextId(
  19     const v8::FunctionCallbackInfo<v8::Value>& args) {
  20   static int32_t next_id = 0;
  21   ++next_id;
  22   // Make sure 0 is never returned because some APIs (particularly WebRequest)
  23   // have special meaning for 0 IDs.
  24   if (next_id == 0)
  25     next_id = 1;
  26   args.GetReturnValue().Set(next_id);
  27 }
  28
  29 }  // namespace extensions