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      1 /*
      2  * Copyright (C) 2011, Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are met:
      6  *
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
     14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     16  * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
     17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     19  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
     20  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
     23  * DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "modules/gamepad/NavigatorGamepad.h"
     28 
     29 #include "core/frame/Navigator.h"
     30 #include "modules/gamepad/GamepadList.h"
     31 #include "public/platform/Platform.h"
     32 #include "wtf/PassOwnPtr.h"
     33 
     34 namespace WebCore {
     35 
     36 static void sampleGamepads(GamepadList* into)
     37 {
     38     blink::WebGamepads gamepads;
     39 
     40     blink::Platform::current()->sampleGamepads(gamepads);
     41 
     42     for (unsigned i = 0; i < blink::WebGamepads::itemsLengthCap; ++i) {
     43         blink::WebGamepad& webGamepad = gamepads.items[i];
     44         if (i < gamepads.length && webGamepad.connected) {
     45             RefPtr<Gamepad> gamepad = into->item(i);
     46             if (!gamepad)
     47                 gamepad = Gamepad::create();
     48             gamepad->id(webGamepad.id);
     49             gamepad->index(i);
     50             gamepad->timestamp(webGamepad.timestamp);
     51             gamepad->axes(webGamepad.axesLength, webGamepad.axes);
     52             gamepad->buttons(webGamepad.buttonsLength, webGamepad.buttons);
     53             into->set(i, gamepad);
     54         } else {
     55             into->set(i, 0);
     56         }
     57     }
     58 }
     59 
     60 NavigatorGamepad::NavigatorGamepad()
     61 {
     62 }
     63 
     64 NavigatorGamepad::~NavigatorGamepad()
     65 {
     66 }
     67 
     68 const char* NavigatorGamepad::supplementName()
     69 {
     70     return "NavigatorGamepad";
     71 }
     72 
     73 NavigatorGamepad* NavigatorGamepad::from(Navigator* navigator)
     74 {
     75     NavigatorGamepad* supplement = static_cast<NavigatorGamepad*>(Supplement<Navigator>::from(navigator, supplementName()));
     76     if (!supplement) {
     77         supplement = new NavigatorGamepad();
     78         provideTo(navigator, supplementName(), adoptPtr(supplement));
     79     }
     80     return supplement;
     81 }
     82 
     83 GamepadList* NavigatorGamepad::webkitGetGamepads(Navigator* navigator)
     84 {
     85     return NavigatorGamepad::from(navigator)->gamepads();
     86 }
     87 
     88 GamepadList* NavigatorGamepad::gamepads()
     89 {
     90     if (!m_gamepads)
     91         m_gamepads = GamepadList::create();
     92     sampleGamepads(m_gamepads.get());
     93     return m_gamepads.get();
     94 }
     95 
     96 } // namespace WebCore
     97