third_party/WebKit/Source/modules/webmidi/NavigatorWebMIDI.cpp

/*
 * Copyright (C) 2013 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:
 *
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 * notice, this list of conditions and the following disclaimer.
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
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 * contributors may be used to endorse or promote products derived from
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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#include "modules/webmidi/NavigatorWebMIDI.h"

#include "bindings/core/v8/ScriptPromise.h"
#include "bindings/core/v8/ScriptPromiseResolver.h"
#include "core/dom/DOMException.h"
#include "core/dom/Document.h"
#include "core/frame/LocalFrame.h"
#include "core/frame/Navigator.h"
#include "core/frame/UseCounter.h"
#include "modules/webmidi/MIDIAccessInitializer.h"
#include "modules/webmidi/MIDIOptions.h"

namespace blink {

NavigatorWebMIDI::NavigatorWebMIDI(LocalFrame* frame)
    : DOMWindowProperty(frame)
{
}

NavigatorWebMIDI::~NavigatorWebMIDI()
{
}

DEFINE_TRACE(NavigatorWebMIDI)
{
    HeapSupplement<Navigator>::trace(visitor);
    DOMWindowProperty::trace(visitor);
}

const char* NavigatorWebMIDI::supplementName()
{
    return "NavigatorWebMIDI";
}

NavigatorWebMIDI& NavigatorWebMIDI::from(Navigator& navigator)
{
    NavigatorWebMIDI* supplement = static_cast<NavigatorWebMIDI*>(HeapSupplement<Navigator>::from(navigator, supplementName()));
    if (!supplement) {
        supplement = new NavigatorWebMIDI(navigator.frame());
        provideTo(navigator, supplementName(), supplement);
    }
    return *supplement;
}

ScriptPromise NavigatorWebMIDI::requestMIDIAccess(ScriptState* scriptState, Navigator& navigator, const MIDIOptions& options)
{
    return NavigatorWebMIDI::from(navigator).requestMIDIAccess(scriptState, options);
}

ScriptPromise NavigatorWebMIDI::requestMIDIAccess(ScriptState* scriptState, const MIDIOptions& options)
{
    if (!frame() || frame()->document()->activeDOMObjectsAreStopped()) {
        return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(AbortError, "The frame is not working."));
    }

    UseCounter::countCrossOriginIframe(*frame()->document(), UseCounter::RequestMIDIAccessIframe);
    return MIDIAccessInitializer::start(scriptState, options);
}

} // namespace blink