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// 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.
#include "ppapi/proxy/flash_menu_resource.h"
#include "ppapi/c/pp_errors.h"
#include "ppapi/proxy/ppapi_messages.h"
#include "ppapi/proxy/serialized_flash_menu.h"
namespace ppapi {
namespace proxy {
FlashMenuResource::FlashMenuResource(Connection connection,
PP_Instance instance)
: PluginResource(connection, instance),
selected_id_dest_(NULL) {
}
FlashMenuResource::~FlashMenuResource() {
}
bool FlashMenuResource::Initialize(const PP_Flash_Menu* menu_data) {
SerializedFlashMenu serialized_menu;
if (!menu_data || !serialized_menu.SetPPMenu(menu_data))
return false;
SendCreate(RENDERER, PpapiHostMsg_FlashMenu_Create(serialized_menu));
return true;
}
thunk::PPB_Flash_Menu_API* FlashMenuResource::AsPPB_Flash_Menu_API() {
return this;
}
int32_t FlashMenuResource::Show(
const PP_Point* location,
int32_t* selected_id,
scoped_refptr<TrackedCallback> callback) {
if (TrackedCallback::IsPending(callback_))
return PP_ERROR_INPROGRESS;
selected_id_dest_ = selected_id;
callback_ = callback;
// This must be a sync message even though we don't care about the result.
// The actual reply will be sent asynchronously in the future. This sync
// request is due to the following deadlock:
//
// 1. Flash sends a show request to the renderer.
// 2. The show handler in the renderer (in the case of full screen) requests
// the window rect which is a sync message to the browser. This causes
// a nested run loop to be spun up in the renderer.
// 3. Flash expects context menus to be synchronous so it starts a nested
// message loop. This creates a second nested run loop in both the
// plugin and renderer process.
// 4. The browser sends the window rect reply to unblock the renderer, but
// it's in the second nested run loop and the reply will *not*
// unblock this loop.
// 5. The second loop won't exit until the message loop is complete, but
// that can't start until the first one exits.
//
// Having this message sync forces the sync request from the renderer to the
// browser for the window rect will complete before Flash can run a nested
// message loop to wait for the result of the menu.
SyncCall<IPC::Message>(RENDERER, PpapiHostMsg_FlashMenu_Show(*location));
return PP_OK_COMPLETIONPENDING;
}
void FlashMenuResource::OnReplyReceived(
const proxy::ResourceMessageReplyParams& params,
const IPC::Message& msg) {
// Because the Show call is synchronous but we ignore the sync result, we
// can't use the normal reply dispatch and have to do it manually here.
switch (msg.type()) {
case PpapiPluginMsg_FlashMenu_ShowReply::ID: {
int32_t selected_id;
if (ppapi::UnpackMessage<PpapiPluginMsg_FlashMenu_ShowReply>(
msg, &selected_id))
OnShowReply(params, selected_id);
break;
}
}
}
void FlashMenuResource::OnShowReply(
const proxy::ResourceMessageReplyParams& params,
int32_t selected_id) {
if (!TrackedCallback::IsPending(callback_))
return;
*selected_id_dest_ = selected_id;
selected_id_dest_ = NULL;
callback_->Run(params.result());
}
} // namespace proxy
} // namespace ppapi
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