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/*
* Copyright (C) 2014 Apple 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 INC. 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 INC. 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 "GamepadManager.h"
#if ENABLE(GAMEPAD)
#include "DOMWindow.h"
#include "Document.h"
#include "EventNames.h"
#include "Gamepad.h"
#include "GamepadEvent.h"
#include "GamepadProvider.h"
#include "Logging.h"
#include "NavigatorGamepad.h"
#include "PlatformGamepad.h"
namespace WebCore {
static NavigatorGamepad* navigatorGamepadFromDOMWindow(DOMWindow* window)
{
Navigator* navigator = window->navigator();
if (!navigator)
return nullptr;
return NavigatorGamepad::from(navigator);
}
GamepadManager& GamepadManager::singleton()
{
static NeverDestroyed<GamepadManager> sharedManager;
return sharedManager;
}
GamepadManager::GamepadManager()
: m_isMonitoringGamepads(false)
{
}
void GamepadManager::platformGamepadConnected(PlatformGamepad& platformGamepad)
{
// Notify blind Navigators and Windows about all gamepads except for this one.
for (auto* gamepad : GamepadProvider::singleton().platformGamepads()) {
if (!gamepad || gamepad == &platformGamepad)
continue;
makeGamepadVisible(*gamepad, m_gamepadBlindNavigators, m_gamepadBlindDOMWindows);
}
m_gamepadBlindNavigators.clear();
m_gamepadBlindDOMWindows.clear();
// Notify everyone of this new gamepad.
makeGamepadVisible(platformGamepad, m_navigators, m_domWindows);
}
void GamepadManager::platformGamepadDisconnected(PlatformGamepad& platformGamepad)
{
Vector<WeakPtr<DOMWindow>> weakWindows;
for (auto* domWindow : m_domWindows)
weakWindows.append(domWindow->createWeakPtr());
HashSet<NavigatorGamepad*> notifiedNavigators;
// Handle the disconnect for all DOMWindows with event listeners and their Navigators.
for (auto& window : weakWindows) {
// Event dispatch might have made this window go away.
if (!window)
continue;
// This DOMWindow's Navigator might not be accessible. e.g. The DOMWindow might be in the back/forward cache.
// If this happens the DOMWindow will not get this gamepaddisconnected event.
NavigatorGamepad* navigator = navigatorGamepadFromDOMWindow(window.get());
if (!navigator)
continue;
// If this Navigator hasn't seen gamepads yet then its Window should not get the disconnect event.
if (m_gamepadBlindNavigators.contains(navigator))
continue;
Ref<Gamepad> gamepad(navigator->gamepadFromPlatformGamepad(platformGamepad));
navigator->gamepadDisconnected(platformGamepad);
notifiedNavigators.add(navigator);
window->dispatchEvent(GamepadEvent::create(eventNames().gamepaddisconnectedEvent, gamepad.get()), window->document());
}
// Notify all the Navigators that haven't already been notified.
for (auto* navigator : m_navigators) {
if (!notifiedNavigators.contains(navigator))
navigator->gamepadDisconnected(platformGamepad);
}
}
void GamepadManager::platformGamepadInputActivity(bool shouldMakeGamepadVisible)
{
if (!shouldMakeGamepadVisible)
return;
if (m_gamepadBlindNavigators.isEmpty() && m_gamepadBlindDOMWindows.isEmpty())
return;
for (auto* gamepad : GamepadProvider::singleton().platformGamepads()) {
if (gamepad)
makeGamepadVisible(*gamepad, m_gamepadBlindNavigators, m_gamepadBlindDOMWindows);
}
m_gamepadBlindNavigators.clear();
m_gamepadBlindDOMWindows.clear();
}
void GamepadManager::makeGamepadVisible(PlatformGamepad& platformGamepad, HashSet<NavigatorGamepad*>& navigatorSet, HashSet<DOMWindow*>& domWindowSet)
{
if (navigatorSet.isEmpty() && domWindowSet.isEmpty())
return;
for (auto* navigator : navigatorSet)
navigator->gamepadConnected(platformGamepad);
Vector<WeakPtr<DOMWindow>> weakWindows;
for (auto* domWindow : m_domWindows)
weakWindows.append(domWindow->createWeakPtr());
for (auto& window : weakWindows) {
// Event dispatch might have made this window go away.
if (!window)
continue;
// This DOMWindow's Navigator might not be accessible. e.g. The DOMWindow might be in the back/forward cache.
// If this happens the DOMWindow will not get this gamepadconnected event.
// The new gamepad will still be visibile to it once it is restored from the back/forward cache.
NavigatorGamepad* navigator = navigatorGamepadFromDOMWindow(window.get());
if (!navigator)
continue;
Ref<Gamepad> gamepad(navigator->gamepadFromPlatformGamepad(platformGamepad));
window->dispatchEvent(GamepadEvent::create(eventNames().gamepadconnectedEvent, gamepad.get()), window->document());
}
}
void GamepadManager::registerNavigator(NavigatorGamepad* navigator)
{
LOG(Gamepad, "GamepadManager registering NavigatorGamepad %p", navigator);
ASSERT(!m_navigators.contains(navigator));
m_navigators.add(navigator);
m_gamepadBlindNavigators.add(navigator);
maybeStartMonitoringGamepads();
}
void GamepadManager::unregisterNavigator(NavigatorGamepad* navigator)
{
LOG(Gamepad, "GamepadManager unregistering NavigatorGamepad %p", navigator);
ASSERT(m_navigators.contains(navigator));
m_navigators.remove(navigator);
m_gamepadBlindNavigators.remove(navigator);
maybeStopMonitoringGamepads();
}
void GamepadManager::registerDOMWindow(DOMWindow* window)
{
LOG(Gamepad, "GamepadManager registering DOMWindow %p", window);
ASSERT(!m_domWindows.contains(window));
m_domWindows.add(window);
// Anytime we register a DOMWindow, we should also double check that its NavigatorGamepad is registered.
NavigatorGamepad* navigator = navigatorGamepadFromDOMWindow(window);
ASSERT(navigator);
if (m_navigators.add(navigator).isNewEntry)
m_gamepadBlindNavigators.add(navigator);
// If this DOMWindow's NavigatorGamepad was already registered but was still blind,
// then this DOMWindow should be blind.
if (m_gamepadBlindNavigators.contains(navigator))
m_gamepadBlindDOMWindows.add(window);
maybeStartMonitoringGamepads();
}
void GamepadManager::unregisterDOMWindow(DOMWindow* window)
{
LOG(Gamepad, "GamepadManager unregistering DOMWindow %p", window);
ASSERT(m_domWindows.contains(window));
m_domWindows.remove(window);
m_gamepadBlindDOMWindows.remove(window);
maybeStopMonitoringGamepads();
}
void GamepadManager::maybeStartMonitoringGamepads()
{
if (m_isMonitoringGamepads)
return;
if (!m_navigators.isEmpty() || !m_domWindows.isEmpty()) {
LOG(Gamepad, "GamepadManager has %i NavigatorGamepads and %i DOMWindows registered, is starting gamepad monitoring", m_navigators.size(), m_domWindows.size());
m_isMonitoringGamepads = true;
GamepadProvider::singleton().startMonitoringGamepads(*this);
}
}
void GamepadManager::maybeStopMonitoringGamepads()
{
if (!m_isMonitoringGamepads)
return;
if (m_navigators.isEmpty() && m_domWindows.isEmpty()) {
LOG(Gamepad, "GamepadManager has no NavigatorGamepads or DOMWindows registered, is stopping gamepad monitoring");
m_isMonitoringGamepads = false;
GamepadProvider::singleton().stopMonitoringGamepads(*this);
}
}
} // namespace WebCore
#endif // ENABLE(GAMEPAD)
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