chrome/renderer/extensions/tabs_custom_bindings.cc

   1 // Copyright (c) 2012 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/tabs_custom_bindings.h"
   6
   7 #include <string>
   8
   9 #include "base/bind.h"
  10 #include "content/public/renderer/render_frame.h"
  11 #include "extensions/common/extension_messages.h"
  12 #include "extensions/renderer/script_context.h"
  13 #include "v8/include/v8.h"
  14
  15 namespace extensions {
  16
  17 TabsCustomBindings::TabsCustomBindings(ScriptContext* context)
  18     : ObjectBackedNativeHandler(context) {
  19   RouteFunction("OpenChannelToTab",
  20       base::Bind(&TabsCustomBindings::OpenChannelToTab,
  21                  base::Unretained(this)));
  22 }
  23
  24 void TabsCustomBindings::OpenChannelToTab(
  25     const v8::FunctionCallbackInfo<v8::Value>& args) {
  26   content::RenderFrame* render_frame = context()->GetRenderFrame();
  27   if (!render_frame)
  28     return;
  29
  30   // tabs_custom_bindings.js unwraps arguments to tabs.connect/sendMessage and
  31   // passes them to OpenChannelToTab, in the following order:
  32   // - |tab_id| - Positive number that specifies the destination of the channel.
  33   // - |frame_id| - Target frame(s) in the tab where onConnect is dispatched:
  34   //   -1 for all frames, 0 for the main frame, >0 for a child frame.
  35   // - |extension_id| - Extension ID of sender and destination.
  36   // - |channel_name| - A user-defined channel name.
  37   CHECK(args.Length() >= 4 &&
  38         args[0]->IsInt32() &&
  39         args[1]->IsInt32() &&
  40         args[2]->IsString() &&
  41         args[3]->IsString());
  42
  43   ExtensionMsg_TabTargetConnectionInfo info;
  44   info.tab_id = args[0]->Int32Value();
  45   info.frame_id = args[1]->Int32Value();
  46   std::string extension_id = *v8::String::Utf8Value(args[2]);
  47   std::string channel_name = *v8::String::Utf8Value(args[3]);
  48   int port_id = -1;
  49   render_frame->Send(new ExtensionHostMsg_OpenChannelToTab(
  50       info, extension_id, channel_name, &port_id));
  51   args.GetReturnValue().Set(static_cast<int32_t>(port_id));
  52 }
  53
  54 }  // namespace extensions