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// Copyright (c) 2010 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.
// This file defines utility functions for sending notifications (calling
// methods that return void and do not have out params) to the RenderViewHost
// or one of its delegate interfaces. The notifications are dispatched
// asynchronously, and only if the specified RenderViewHost still exists.
#ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_NOTIFICATION_TASK_H_
#define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_NOTIFICATION_TASK_H_
#pragma once
#include "base/callback_old.h"
#include "base/task.h"
#include "content/browser/browser_thread.h"
#include "content/browser/renderer_host/render_view_host.h"
#include "content/browser/renderer_host/render_view_host_delegate.h"
// ----------------------------------------------------------------------------
namespace internal {
// The simplest Mapper, used when proxying calls to a RenderViewHost.
class RenderViewHostIdentityMapper {
public:
typedef RenderViewHost MappedType;
static MappedType* Map(RenderViewHost* rvh) { return rvh; }
};
template <typename Method, typename Params,
typename Mapper = RenderViewHostIdentityMapper>
class RenderViewHostNotificationTask : public Task {
public:
RenderViewHostNotificationTask(int render_process_id,
int render_view_id,
Method method,
const Params& params)
: render_process_id_(render_process_id),
render_view_id_(render_view_id),
unbound_method_(method, params) {
}
virtual void Run() {
RenderViewHost* rvh = RenderViewHost::FromID(render_process_id_,
render_view_id_);
typename Mapper::MappedType* obj = Mapper::Map(rvh);
if (obj)
unbound_method_.Run(obj);
}
private:
int render_process_id_;
int render_view_id_;
UnboundMethod<typename Mapper::MappedType, Method, Params> unbound_method_;
DISALLOW_COPY_AND_ASSIGN(RenderViewHostNotificationTask);
};
// For proxying calls to RenderViewHost
template <typename Method, typename Params>
inline void CallRenderViewHostHelper(int render_process_id, int render_view_id,
Method method, const Params& params) {
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
new RenderViewHostNotificationTask<Method, Params>(render_process_id,
render_view_id,
method,
params));
}
// For proxying calls to RenderViewHostDelegate::RendererManagement
class RenderViewHostToRendererManagementDelegate {
public:
typedef RenderViewHostDelegate::RendererManagement MappedType;
static MappedType* Map(RenderViewHost* rvh) {
return rvh ? rvh->delegate()->GetRendererManagementDelegate() : NULL;
}
};
template <typename Method, typename Params>
inline void CallRenderViewHostRendererManagementDelegateHelper(
int render_process_id,
int render_view_id,
Method method,
const Params& params) {
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
new RenderViewHostNotificationTask<
Method, Params, RenderViewHostToRendererManagementDelegate>(
render_process_id,
render_view_id,
method,
params));
}
} // namespace internal
// ----------------------------------------------------------------------------
// Proxy calls to the specified RenderViewHost.
template <typename Method>
inline void CallRenderViewHost(int render_process_id,
int render_view_id,
Method method) {
internal::CallRenderViewHostHelper(render_process_id,
render_view_id,
method,
MakeTuple());
}
template <typename Method, typename A>
inline void CallRenderViewHost(int render_process_id,
int render_view_id,
Method method,
const A& a) {
internal::CallRenderViewHostHelper(render_process_id,
render_view_id,
method,
MakeTuple(a));
}
template <typename Method, typename A, typename B>
inline void CallRenderViewHost(int render_process_id,
int render_view_id,
Method method,
const A& a,
const B& b) {
internal::CallRenderViewHostHelper(render_process_id,
render_view_id,
method,
MakeTuple(a, b));
}
// ----------------------------------------------------------------------------
// Proxy calls to the specified RenderViewHost's RendererManagement delegate.
template <typename Method>
inline void CallRenderViewHostRendererManagementDelegate(int render_process_id,
int render_view_id,
Method method) {
internal::CallRenderViewHostRendererManagementDelegateHelper(
render_process_id,
render_view_id,
method,
MakeTuple());
}
template <typename Method, typename A>
inline void CallRenderViewHostRendererManagementDelegate(int render_process_id,
int render_view_id,
Method method,
const A& a) {
internal::CallRenderViewHostRendererManagementDelegateHelper(
render_process_id,
render_view_id,
method,
MakeTuple(a));
}
template <typename Method, typename A, typename B>
inline void CallRenderViewHostRendererManagementDelegate(int render_process_id,
int render_view_id,
Method method,
const A& a,
const B& b) {
internal::CallRenderViewHostRendererManagementDelegateHelper(
render_process_id,
render_view_id,
method,
MakeTuple(a, b));
}
// ----------------------------------------------------------------------------
#endif // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_NOTIFICATION_TASK_H_
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