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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "WebCompositorInputHandlerImpl.h"
#include "WebCompositorImpl.h"
#include "WebCompositorInputHandlerClient.h"
#include "WebInputEvent.h"
#include "WebKit.h"
#include "platform/WebKitPlatformSupport.h"
#include "cc/CCProxy.h"
#include <wtf/ThreadingPrimitives.h>
using namespace WebCore;
namespace WebCore {
PassOwnPtr<CCInputHandler> CCInputHandler::create(CCInputHandlerClient* inputHandlerClient)
{
return WebKit::WebCompositorInputHandlerImpl::create(inputHandlerClient);
}
}
namespace WebKit {
// These statics may only be accessed from the compositor thread.
int WebCompositorInputHandlerImpl::s_nextAvailableIdentifier = 1;
HashSet<WebCompositorInputHandlerImpl*>* WebCompositorInputHandlerImpl::s_compositors = 0;
WebCompositor* WebCompositorInputHandler::fromIdentifier(int identifier)
{
return static_cast<WebCompositor*>(WebCompositorInputHandlerImpl::fromIdentifier(identifier));
}
PassOwnPtr<WebCompositorInputHandlerImpl> WebCompositorInputHandlerImpl::create(WebCore::CCInputHandlerClient* inputHandlerClient)
{
return adoptPtr(new WebCompositorInputHandlerImpl(inputHandlerClient));
}
WebCompositorInputHandler* WebCompositorInputHandlerImpl::fromIdentifier(int identifier)
{
ASSERT(WebCompositorImpl::initialized());
ASSERT(CCProxy::isImplThread());
if (!s_compositors)
return 0;
for (HashSet<WebCompositorInputHandlerImpl*>::iterator it = s_compositors->begin(); it != s_compositors->end(); ++it) {
if ((*it)->identifier() == identifier)
return *it;
}
return 0;
}
WebCompositorInputHandlerImpl::WebCompositorInputHandlerImpl(CCInputHandlerClient* inputHandlerClient)
: m_client(0)
, m_identifier(s_nextAvailableIdentifier++)
, m_inputHandlerClient(inputHandlerClient)
#ifndef NDEBUG
, m_expectScrollUpdateEnd(false)
, m_expectPinchUpdateEnd(false)
#endif
, m_scrollStarted(false)
{
ASSERT(CCProxy::isImplThread());
if (!s_compositors)
s_compositors = new HashSet<WebCompositorInputHandlerImpl*>;
s_compositors->add(this);
}
WebCompositorInputHandlerImpl::~WebCompositorInputHandlerImpl()
{
ASSERT(CCProxy::isImplThread());
if (m_client)
m_client->willShutdown();
ASSERT(s_compositors);
s_compositors->remove(this);
if (!s_compositors->size()) {
delete s_compositors;
s_compositors = 0;
}
}
void WebCompositorInputHandlerImpl::setClient(WebCompositorInputHandlerClient* client)
{
ASSERT(CCProxy::isImplThread());
// It's valid to set a new client if we've never had one or to clear the client, but it's not valid to change from having one client to a different one.
ASSERT(!m_client || !client);
m_client = client;
}
void WebCompositorInputHandlerImpl::handleInputEvent(const WebInputEvent& event)
{
ASSERT(CCProxy::isImplThread());
ASSERT(m_client);
if (event.type == WebInputEvent::MouseWheel && !m_inputHandlerClient->haveWheelEventHandlers()) {
const WebMouseWheelEvent& wheelEvent = *static_cast<const WebMouseWheelEvent*>(&event);
CCInputHandlerClient::ScrollStatus scrollStatus = m_inputHandlerClient->scrollBegin(IntPoint(wheelEvent.x, wheelEvent.y));
switch (scrollStatus) {
case CCInputHandlerClient::ScrollStarted:
m_inputHandlerClient->scrollBy(IntSize(-wheelEvent.deltaX, -wheelEvent.deltaY));
m_inputHandlerClient->scrollEnd();
m_client->didHandleInputEvent();
return;
case CCInputHandlerClient::ScrollIgnored:
m_client->didNotHandleInputEvent(false /* sendToWidget */);
return;
case CCInputHandlerClient::ScrollFailed:
break;
}
} else if (event.type == WebInputEvent::GestureScrollBegin) {
ASSERT(!m_scrollStarted);
ASSERT(!m_expectScrollUpdateEnd);
#ifndef NDEBUG
m_expectScrollUpdateEnd = true;
#endif
const WebGestureEvent& gestureEvent = *static_cast<const WebGestureEvent*>(&event);
CCInputHandlerClient::ScrollStatus scrollStatus = m_inputHandlerClient->scrollBegin(IntPoint(gestureEvent.x, gestureEvent.y));
switch (scrollStatus) {
case CCInputHandlerClient::ScrollStarted:
m_scrollStarted = true;
m_client->didHandleInputEvent();
return;
case CCInputHandlerClient::ScrollIgnored:
m_client->didNotHandleInputEvent(false /* sendToWidget */);
return;
case CCInputHandlerClient::ScrollFailed:
break;
}
} else if (event.type == WebInputEvent::GestureScrollUpdate) {
ASSERT(m_expectScrollUpdateEnd);
if (m_scrollStarted) {
const WebGestureEvent& gestureEvent = *static_cast<const WebGestureEvent*>(&event);
m_inputHandlerClient->scrollBy(IntSize(-gestureEvent.deltaX, -gestureEvent.deltaY));
m_client->didHandleInputEvent();
return;
}
} else if (event.type == WebInputEvent::GestureScrollEnd) {
ASSERT(m_expectScrollUpdateEnd);
#ifndef NDEBUG
m_expectScrollUpdateEnd = false;
#endif
if (m_scrollStarted) {
m_inputHandlerClient->scrollEnd();
m_client->didHandleInputEvent();
m_scrollStarted = false;
return;
}
} else if (event.type == WebInputEvent::GesturePinchBegin) {
ASSERT(!m_expectPinchUpdateEnd);
#ifndef NDEBUG
m_expectPinchUpdateEnd = true;
#endif
m_inputHandlerClient->pinchGestureBegin();
m_client->didHandleInputEvent();
return;
} else if (event.type == WebInputEvent::GesturePinchEnd) {
ASSERT(m_expectPinchUpdateEnd);
#ifndef NDEBUG
m_expectPinchUpdateEnd = false;
#endif
m_inputHandlerClient->pinchGestureEnd();
m_client->didHandleInputEvent();
return;
} else if (event.type == WebInputEvent::GesturePinchUpdate) {
ASSERT(m_expectPinchUpdateEnd);
const WebGestureEvent& gestureEvent = *static_cast<const WebGestureEvent*>(&event);
m_inputHandlerClient->pinchGestureUpdate(gestureEvent.deltaX, IntPoint(gestureEvent.x, gestureEvent.y));
m_client->didHandleInputEvent();
return;
}
m_client->didNotHandleInputEvent(true /* sendToWidget */);
}
int WebCompositorInputHandlerImpl::identifier() const
{
ASSERT(CCProxy::isImplThread());
return m_identifier;
}
void WebCompositorInputHandlerImpl::willDraw(double frameBeginTimeMs)
{
}
}
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