root/Source/modules/gamepad/GamepadDispatcher.cpp

DEFINITIONS

1. instance
2. addClient
3. removeClient
4. sampleGamepads
5. didConnectGamepad
6. didDisconnectGamepad
7. dispatchDidConnectOrDisconnectGamepad
8. startListening
9. stopListening

// Copyright 2014 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 "config.h"
#include "modules/gamepad/GamepadDispatcher.h"

#include "modules/gamepad/NavigatorGamepad.h"
#include "public/platform/Platform.h"
#include "wtf/TemporaryChange.h"

namespace WebCore {

GamepadDispatcher& GamepadDispatcher::instance()
{
    DEFINE_STATIC_LOCAL(GamepadDispatcher, gamepadDispatcher, ());
    return gamepadDispatcher;
}

void GamepadDispatcher::addClient(NavigatorGamepad* client)
{
    addController(client);
}

void GamepadDispatcher::removeClient(NavigatorGamepad* client)
{
    removeController(client);
}

void GamepadDispatcher::sampleGamepads(blink::WebGamepads& gamepads)
{
    ASSERT(!m_controllers.isEmpty());
    blink::Platform::current()->sampleGamepads(gamepads);
}

GamepadDispatcher::GamepadDispatcher()
{
}

GamepadDispatcher::~GamepadDispatcher()
{
}

void GamepadDispatcher::didConnectGamepad(unsigned index, const blink::WebGamepad& gamepad)
{
    dispatchDidConnectOrDisconnectGamepad(index, gamepad, true);
}

void GamepadDispatcher::didDisconnectGamepad(unsigned index, const blink::WebGamepad& gamepad)
{
    dispatchDidConnectOrDisconnectGamepad(index, gamepad, false);
}

void GamepadDispatcher::dispatchDidConnectOrDisconnectGamepad(unsigned index, const blink::WebGamepad& gamepad, bool connected)
{
    {
        TemporaryChange<bool> changeIsDispatching(m_isDispatching, true);
        // Don't fire controllers removed or added during event dispatch.
        size_t size = m_controllers.size();
        for (size_t i = 0; i < size; ++i) {
            if (m_controllers[i])
                static_cast<NavigatorGamepad*>(m_controllers[i])->didConnectOrDisconnectGamepad(index, gamepad, connected);
        }
    }

    if (m_needsPurge)
        purgeControllers();
}

void GamepadDispatcher::startListening()
{
    blink::Platform::current()->setGamepadListener(this);
}

void GamepadDispatcher::stopListening()
{
    blink::Platform::current()->setGamepadListener(0);
}

} // namespace WebCore