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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 "content/renderer/gpu/compositor_thread.h"
#include "base/bind.h"
#include "base/debug/trace_event.h"
#include "content/renderer/gpu/input_event_filter.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebActiveWheelFlingParameters.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebCompositorInputHandlerClient.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebCompositorInputHandler.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
#if defined(OS_ANDROID)
// TODO(epenner): Move thread priorities to base. (crbug.com/170549)
#include <sys/resource.h>
#endif
using WebKit::WebCompositorInputHandler;
using WebKit::WebInputEvent;
namespace content {
//------------------------------------------------------------------------------
class CompositorThread::InputHandlerWrapper
: public WebKit::WebCompositorInputHandlerClient,
public base::RefCountedThreadSafe<InputHandlerWrapper> {
public:
InputHandlerWrapper(CompositorThread* compositor_thread,
int routing_id,
WebKit::WebCompositorInputHandler* input_handler,
scoped_refptr<base::MessageLoopProxy> main_loop,
const base::WeakPtr<RenderViewImpl>& render_view_impl)
: compositor_thread_(compositor_thread),
routing_id_(routing_id),
input_handler_(input_handler),
main_loop_(main_loop),
render_view_impl_(render_view_impl) {
input_handler_->setClient(this);
}
virtual void transferActiveWheelFlingAnimation(
const WebKit::WebActiveWheelFlingParameters& params) {
main_loop_->PostTask(
FROM_HERE,
base::Bind(&RenderViewImpl::TransferActiveWheelFlingAnimation,
render_view_impl_, params));
}
int routing_id() const { return routing_id_; }
WebKit::WebCompositorInputHandler* input_handler() const {
return input_handler_;
}
// WebCompositorInputHandlerClient methods:
virtual void willShutdown() {
compositor_thread_->RemoveInputHandler(routing_id_);
}
virtual void didHandleInputEvent() {
compositor_thread_->filter_->DidHandleInputEvent();
}
virtual void didNotHandleInputEvent(bool send_to_widget) {
compositor_thread_->filter_->DidNotHandleInputEvent(send_to_widget);
}
private:
friend class base::RefCountedThreadSafe<InputHandlerWrapper>;
virtual ~InputHandlerWrapper() {
input_handler_->setClient(NULL);
}
CompositorThread* compositor_thread_;
int routing_id_;
WebKit::WebCompositorInputHandler* input_handler_;
scoped_refptr<base::MessageLoopProxy> main_loop_;
// Can only be accessed on the main thread.
base::WeakPtr<RenderViewImpl> render_view_impl_;
DISALLOW_COPY_AND_ASSIGN(InputHandlerWrapper);
};
//------------------------------------------------------------------------------
#if defined(OS_ANDROID)
// TODO(epenner): Move thread priorities to base. (crbug.com/170549)
namespace {
void SetHighThreadPriority() {
int nice_value = -6; // High priority.
setpriority(PRIO_PROCESS, base::PlatformThread::CurrentId(), nice_value);
}
}
#endif
CompositorThread::CompositorThread(IPC::Listener* main_listener)
: thread_("Compositor") {
filter_ =
new InputEventFilter(main_listener,
thread_.message_loop()->message_loop_proxy(),
base::Bind(&CompositorThread::HandleInputEvent,
base::Unretained(this)));
#if defined(OS_ANDROID)
// TODO(epenner): Move thread priorities to base. (crbug.com/170549)
thread_.message_loop()->PostTask(FROM_HERE,
base::Bind(&SetHighThreadPriority));
#endif
}
CompositorThread::~CompositorThread() {
}
IPC::ChannelProxy::MessageFilter* CompositorThread::GetMessageFilter() const {
return filter_;
}
void CompositorThread::AddInputHandler(
int routing_id, int input_handler_id,
const base::WeakPtr<RenderViewImpl>& render_view_impl) {
DCHECK_NE(thread_.message_loop(), MessageLoop::current());
thread_.message_loop()->PostTask(
FROM_HERE,
base::Bind(&CompositorThread::AddInputHandlerOnCompositorThread,
base::Unretained(this),
routing_id,
input_handler_id,
base::MessageLoopProxy::current(),
render_view_impl));
}
void CompositorThread::AddInputHandlerOnCompositorThread(
int routing_id, int input_handler_id,
scoped_refptr<base::MessageLoopProxy> main_loop,
const base::WeakPtr<RenderViewImpl>& render_view_impl) {
DCHECK_EQ(thread_.message_loop(), MessageLoop::current());
WebCompositorInputHandler* input_handler =
WebCompositorInputHandler::fromIdentifier(input_handler_id);
if (!input_handler)
return;
if (input_handlers_.count(routing_id) != 0) {
// It's valid to call AddInputHandler() for the same routing id with the
// same input_handler many times, but it's not valid to change the
// input_handler for a route.
DCHECK_EQ(input_handlers_[routing_id]->input_handler(), input_handler);
return;
}
TRACE_EVENT0("CompositorThread::AddInputHandler", "AddingRoute");
filter_->AddRoute(routing_id);
input_handlers_[routing_id] =
make_scoped_refptr(new InputHandlerWrapper(this,
routing_id, input_handler, main_loop, render_view_impl));
}
void CompositorThread::RemoveInputHandler(int routing_id) {
DCHECK_EQ(MessageLoop::current(), thread_.message_loop());
TRACE_EVENT0("CompositorThread::RemoveInputHandler", "RemovingRoute");
filter_->RemoveRoute(routing_id);
input_handlers_.erase(routing_id);
}
void CompositorThread::HandleInputEvent(
int routing_id,
const WebInputEvent* input_event) {
DCHECK_EQ(MessageLoop::current(), thread_.message_loop());
InputHandlerMap::iterator it = input_handlers_.find(routing_id);
if (it == input_handlers_.end()) {
TRACE_EVENT0("CompositorThread::HandleInputEvent", "NoInputHandlerFound");
// Oops, we no longer have an interested input handler..
filter_->DidNotHandleInputEvent(true);
return;
}
it->second->input_handler()->handleInputEvent(*input_event);
}
} // namespace content
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