root/Source/core/html/track/TextTrackCueList.cpp

/* [<][>][^][v][top][bottom][index][help] */

DEFINITIONS

This source file includes following definitions.
  1. length
  2. getCueIndex
  3. item
  4. getCueById
  5. activeCues
  6. add
  7. add
  8. remove
  9. contains
  10. updateCueIndex
  11. clear
  12. invalidateCueIndexes

/*
 * Copyright (C) 2011 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:
 * 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/TextTrackCueList.h"

namespace WebCore {

TextTrackCueList::TextTrackCueList()
{
    ScriptWrappable::init(this);
}

unsigned long TextTrackCueList::length() const
{
    return m_list.size();
}

unsigned long TextTrackCueList::getCueIndex(TextTrackCue* cue) const
{
    return m_list.find(cue);
}

TextTrackCue* TextTrackCueList::item(unsigned index) const
{
    if (index < m_list.size())
        return m_list[index].get();
    return 0;
}

TextTrackCue* TextTrackCueList::getCueById(const AtomicString& id) const
{
    for (size_t i = 0; i < m_list.size(); ++i) {
        if (m_list[i]->id() == id)
            return m_list[i].get();
    }
    return 0;
}

TextTrackCueList* TextTrackCueList::activeCues()
{
    if (!m_activeCues)
        m_activeCues = create();

    m_activeCues->clear();
    for (size_t i = 0; i < m_list.size(); ++i) {
        RefPtr<TextTrackCue> cue = m_list[i];
        if (cue->isActive())
            m_activeCues->add(cue);
    }
    return m_activeCues.get();
}

bool TextTrackCueList::add(PassRefPtr<TextTrackCue> cue)
{
    ASSERT(cue->startTime() >= 0);
    ASSERT(cue->endTime() >= 0);

    return add(cue, 0, m_list.size());
}

bool TextTrackCueList::add(PassRefPtr<TextTrackCue> prpCue, size_t start, size_t end)
{
    ASSERT_WITH_SECURITY_IMPLICATION(start <= m_list.size());
    ASSERT_WITH_SECURITY_IMPLICATION(end <= m_list.size());

    // Maintain text track cue order:
    // http://www.whatwg.org/specs/web-apps/current-work/#text-track-cue-order
    RefPtr<TextTrackCue> cue = prpCue;
    if (start == end) {
        if (!m_list.isEmpty() && (start > 0) && (m_list[start - 1].get() == cue.get()))
            return false;

        m_list.insert(start, cue);
        invalidateCueIndexes(start);
        return true;
    }

    size_t index = (start + end) / 2;
    if (cue->startTime() < m_list[index]->startTime() || (cue->startTime() == m_list[index]->startTime() && cue->endTime() > m_list[index]->endTime()))
        return add(cue.release(), start, index);

    return add(cue.release(), index + 1, end);
}

bool TextTrackCueList::remove(TextTrackCue* cue)
{
    size_t index = m_list.find(cue);
    if (index == kNotFound)
        return false;

    cue->setIsActive(false);
    m_list.remove(index);
    return true;
}

bool TextTrackCueList::contains(TextTrackCue* cue) const
{
    return m_list.contains(cue);
}

bool TextTrackCueList::updateCueIndex(TextTrackCue* cue)
{
    if (!contains(cue))
        return false;

    remove(cue);
    return add(cue);
}

void TextTrackCueList::clear()
{
    m_list.clear();
}

void TextTrackCueList::invalidateCueIndexes(size_t start)
{
    for (size_t i = start; i < m_list.size(); ++i)
        m_list[i]->invalidateCueIndex();
}

} // namespace WebCore


/* [<][>][^][v][top][bottom][index][help] */