/*
 * Copyright (C) 2012 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
 * 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 "core/html/track/InbandTextTrack.h"

#include "bindings/core/v8/ExceptionStatePlaceholder.h"
#include "core/html/HTMLMediaElement.h"
#include "core/html/track/TextTrackCueList.h"
#include "core/html/track/vtt/VTTCue.h"
#include "platform/Logging.h"
#include "public/platform/WebInbandTextTrack.h"
#include "public/platform/WebString.h"
#include <math.h>

using blink::WebInbandTextTrack;
using blink::WebString;
using blink::WebInbandTextTrackClient;

namespace blink {

PassRefPtrWillBeRawPtr<InbandTextTrack> InbandTextTrack::create(WebInbandTextTrack* webTrack)
{
    return adoptRefWillBeRefCountedGarbageCollected(new InbandTextTrack(webTrack));
}

InbandTextTrack::InbandTextTrack(WebInbandTextTrack* webTrack)
    : TextTrack(emptyAtom, webTrack->label(), webTrack->language(), webTrack->id(), InBand)
    , m_webTrack(webTrack)
{
    m_webTrack->setClient(this);

    switch (m_webTrack->kind()) {
    case WebInbandTextTrack::KindSubtitles:
        setKind(TextTrack::subtitlesKeyword());
        break;
    case WebInbandTextTrack::KindCaptions:
        setKind(TextTrack::captionsKeyword());
        break;
    case WebInbandTextTrack::KindDescriptions:
        setKind(TextTrack::descriptionsKeyword());
        break;
    case WebInbandTextTrack::KindChapters:
        setKind(TextTrack::chaptersKeyword());
        break;
    case WebInbandTextTrack::KindMetadata:
        setKind(TextTrack::metadataKeyword());
        break;
    case WebInbandTextTrack::KindNone:
    default:
        ASSERT_NOT_REACHED();
        break;
    }
}

InbandTextTrack::~InbandTextTrack()
{
#if ENABLE(OILPAN)
    if (m_webTrack)
        m_webTrack->setClient(0);
#else
    // Make sure m_webTrack was cleared by trackRemoved() before destruction.
    ASSERT(!m_webTrack);
#endif
}

size_t InbandTextTrack::inbandTrackIndex()
{
    ASSERT(m_webTrack);
    return m_webTrack->textTrackIndex();
}

void InbandTextTrack::setTrackList(TextTrackList* trackList)
{
    TextTrack::setTrackList(trackList);
    if (trackList)
        return;

    ASSERT(m_webTrack);
    m_webTrack->setClient(0);
    m_webTrack = 0;
}

void InbandTextTrack::removeCuesRange(double rangeStart, double rangeEnd, WebInbandTextTrackClient::RangeMode rangeMode)
{
    if (!m_cues)
        return;

    size_t i = 0;
    Vector<RefPtr<TextTrackCue> > cuesToRemove;
    while (i < m_cues->length()) {
        RefPtr<TextTrackCue> cue = m_cues->item(i);
        bool removeCue;
        switch (rangeMode) {
        case WebInbandTextTrackClient::FullyWithin:
            removeCue = cue->startTime() >= rangeStart && cue->endTime() <= rangeEnd;
            break;
        case WebInbandTextTrackClient::Overlapping:
            removeCue = cue->startTime() <= rangeEnd && rangeStart <= cue->endTime();
            break;
        default:
            ASSERT_NOT_REACHED();
            return;
        }
        if (removeCue) {
            // remove cue
            cue->setTrack(0);
            m_cues->removeByIndex(i);
            cuesToRemove.append(cue);
        } else {
            // skip cue
            i++;
        }
    }
    if (mediaElement() && !cuesToRemove.isEmpty())
        mediaElement()->textTrackRemoveCues(this, cuesToRemove);
}

void InbandTextTrack::addWebVTTCue(double start, double end, const WebString& id, const WebString& content, const WebString& settings)
{
    HTMLMediaElement* owner = mediaElement();
    ASSERT(owner);
    RefPtrWillBeRawPtr<VTTCue> cue = VTTCue::create(owner->document(), start, end, content);
    cue->setId(id);
    cue->parseSettings(settings);
    addCue(cue);
}

} // namespace blink
