blob: c224d3854e1f0d438c56ba4859ae597b5e0f039b [file] [log] [blame]
/*
* Copyright (C) 2013-2017 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 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 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 "CaptionUserPreferences.h"
#if ENABLE(VIDEO)
#include "AudioTrackList.h"
#include "DOMWrapperWorld.h"
#include "HTMLMediaElement.h"
#include "LocalizedStrings.h"
#include "MediaSelectionOption.h"
#include "Page.h"
#include "PageGroup.h"
#include "Settings.h"
#include "TextTrackList.h"
#include "UserContentController.h"
#include "UserContentTypes.h"
#include "UserStyleSheet.h"
#include "UserStyleSheetTypes.h"
#include <JavaScriptCore/HeapInlines.h>
#include <JavaScriptCore/JSCellInlines.h>
#include <JavaScriptCore/StructureInlines.h>
#include <wtf/Language.h>
namespace WebCore {
CaptionUserPreferences::CaptionUserPreferences(PageGroup& group)
: m_pageGroup(group)
, m_displayMode(ForcedOnly)
, m_timer(*this, &CaptionUserPreferences::timerFired)
{
}
CaptionUserPreferences::~CaptionUserPreferences() = default;
void CaptionUserPreferences::timerFired()
{
captionPreferencesChanged();
}
void CaptionUserPreferences::beginBlockingNotifications()
{
++m_blockNotificationsCounter;
}
void CaptionUserPreferences::endBlockingNotifications()
{
ASSERT(m_blockNotificationsCounter);
--m_blockNotificationsCounter;
}
void CaptionUserPreferences::notify()
{
if (m_blockNotificationsCounter)
return;
m_havePreferences = true;
if (!m_timer.isActive())
m_timer.startOneShot(0_s);
}
CaptionUserPreferences::CaptionDisplayMode CaptionUserPreferences::captionDisplayMode() const
{
return m_displayMode;
}
void CaptionUserPreferences::setCaptionDisplayMode(CaptionUserPreferences::CaptionDisplayMode mode)
{
m_displayMode = mode;
if (m_testingMode && mode != AlwaysOn) {
setUserPrefersCaptions(false);
setUserPrefersSubtitles(false);
}
notify();
}
Page* CaptionUserPreferences::currentPage() const
{
if (m_pageGroup.pages().isEmpty())
return nullptr;
return *(m_pageGroup.pages().begin());
}
bool CaptionUserPreferences::userPrefersCaptions() const
{
Page* page = currentPage();
if (!page)
return false;
return page->settings().shouldDisplayCaptions();
}
void CaptionUserPreferences::setUserPrefersCaptions(bool preference)
{
Page* page = currentPage();
if (!page)
return;
page->settings().setShouldDisplayCaptions(preference);
notify();
}
bool CaptionUserPreferences::userPrefersSubtitles() const
{
Page* page = currentPage();
if (!page)
return false;
return page->settings().shouldDisplaySubtitles();
}
void CaptionUserPreferences::setUserPrefersSubtitles(bool preference)
{
Page* page = currentPage();
if (!page)
return;
page->settings().setShouldDisplaySubtitles(preference);
notify();
}
bool CaptionUserPreferences::userPrefersTextDescriptions() const
{
Page* page = currentPage();
if (!page)
return false;
return page->settings().shouldDisplayTextDescriptions();
}
void CaptionUserPreferences::setUserPrefersTextDescriptions(bool preference)
{
Page* page = currentPage();
if (!page)
return;
page->settings().setShouldDisplayTextDescriptions(preference);
notify();
}
void CaptionUserPreferences::captionPreferencesChanged()
{
m_pageGroup.captionPreferencesChanged();
}
Vector<String> CaptionUserPreferences::preferredLanguages() const
{
Vector<String> languages = userPreferredLanguages();
if (m_testingMode && !m_userPreferredLanguage.isEmpty())
languages.insert(0, m_userPreferredLanguage);
return languages;
}
void CaptionUserPreferences::setPreferredLanguage(const String& language)
{
m_userPreferredLanguage = language;
notify();
}
void CaptionUserPreferences::setPreferredAudioCharacteristic(const String& characteristic)
{
m_userPreferredAudioCharacteristic = characteristic;
notify();
}
Vector<String> CaptionUserPreferences::preferredAudioCharacteristics() const
{
Vector<String> characteristics;
if (!m_userPreferredAudioCharacteristic.isEmpty())
characteristics.append(m_userPreferredAudioCharacteristic);
return characteristics;
}
static String trackDisplayName(TextTrack* track)
{
if (track == &TextTrack::captionMenuOffItem())
return textTrackOffMenuItemText();
if (track == &TextTrack::captionMenuAutomaticItem())
return textTrackAutomaticMenuItemText();
if (track->label().isEmpty() && track->validBCP47Language().isEmpty())
return textTrackNoLabelText();
if (!track->label().isEmpty())
return track->label();
return track->validBCP47Language();
}
String CaptionUserPreferences::displayNameForTrack(TextTrack* track) const
{
return trackDisplayName(track);
}
MediaSelectionOption CaptionUserPreferences::mediaSelectionOptionForTrack(TextTrack* track) const
{
auto type = MediaSelectionOption::Type::Regular;
if (track == &TextTrack::captionMenuOffItem())
type = MediaSelectionOption::Type::LegibleOff;
else if (track == &TextTrack::captionMenuAutomaticItem())
type = MediaSelectionOption::Type::LegibleAuto;
return { displayNameForTrack(track), type };
}
Vector<RefPtr<TextTrack>> CaptionUserPreferences::sortedTrackListForMenu(TextTrackList* trackList)
{
ASSERT(trackList);
Vector<RefPtr<TextTrack>> tracksForMenu;
for (unsigned i = 0, length = trackList->length(); i < length; ++i) {
TextTrack* track = trackList->item(i);
auto kind = track->kind();
if (kind == TextTrack::Kind::Captions || kind == TextTrack::Kind::Descriptions || kind == TextTrack::Kind::Subtitles)
tracksForMenu.append(track);
}
std::sort(tracksForMenu.begin(), tracksForMenu.end(), [](auto& a, auto& b) {
return codePointCompare(trackDisplayName(a.get()), trackDisplayName(b.get())) < 0;
});
tracksForMenu.insert(0, &TextTrack::captionMenuOffItem());
tracksForMenu.insert(1, &TextTrack::captionMenuAutomaticItem());
return tracksForMenu;
}
static String trackDisplayName(AudioTrack* track)
{
if (track->label().isEmpty() && track->validBCP47Language().isEmpty())
return audioTrackNoLabelText();
if (!track->label().isEmpty())
return track->label();
return track->validBCP47Language();
}
String CaptionUserPreferences::displayNameForTrack(AudioTrack* track) const
{
return trackDisplayName(track);
}
MediaSelectionOption CaptionUserPreferences::mediaSelectionOptionForTrack(AudioTrack* track) const
{
return { displayNameForTrack(track), MediaSelectionOption::Type::Regular };
}
Vector<RefPtr<AudioTrack>> CaptionUserPreferences::sortedTrackListForMenu(AudioTrackList* trackList)
{
ASSERT(trackList);
Vector<RefPtr<AudioTrack>> tracksForMenu;
for (unsigned i = 0, length = trackList->length(); i < length; ++i) {
AudioTrack* track = trackList->item(i);
tracksForMenu.append(track);
}
std::sort(tracksForMenu.begin(), tracksForMenu.end(), [](auto& a, auto& b) {
return codePointCompare(trackDisplayName(a.get()), trackDisplayName(b.get())) < 0;
});
return tracksForMenu;
}
int CaptionUserPreferences::textTrackSelectionScore(TextTrack* track, HTMLMediaElement* mediaElement) const
{
CaptionDisplayMode displayMode = captionDisplayMode();
if (displayMode == Manual)
return 0;
bool legacyOverride = mediaElement->webkitClosedCaptionsVisible();
if (displayMode == AlwaysOn && (!userPrefersSubtitles() && !userPrefersCaptions() && !legacyOverride))
return 0;
if (track->kind() != TextTrack::Kind::Captions && track->kind() != TextTrack::Kind::Subtitles && track->kind() != TextTrack::Kind::Forced)
return 0;
if (!track->isMainProgramContent())
return 0;
bool trackHasOnlyForcedSubtitles = track->containsOnlyForcedSubtitles();
if (!legacyOverride && ((trackHasOnlyForcedSubtitles && displayMode != ForcedOnly) || (!trackHasOnlyForcedSubtitles && displayMode == ForcedOnly)))
return 0;
Vector<String> userPreferredCaptionLanguages = preferredLanguages();
if ((displayMode == Automatic && !legacyOverride) || trackHasOnlyForcedSubtitles) {
if (!mediaElement || !mediaElement->player())
return 0;
String textTrackLanguage = track->validBCP47Language();
if (textTrackLanguage.isEmpty())
return 0;
Vector<String> languageList;
languageList.reserveCapacity(1);
String audioTrackLanguage;
if (testingMode())
audioTrackLanguage = primaryAudioTrackLanguageOverride();
else
audioTrackLanguage = mediaElement->player()->languageOfPrimaryAudioTrack();
if (audioTrackLanguage.isEmpty())
return 0;
bool exactMatch;
if (trackHasOnlyForcedSubtitles) {
languageList.append(audioTrackLanguage);
size_t offset = indexOfBestMatchingLanguageInList(textTrackLanguage, languageList, exactMatch);
// Only consider a forced-only track if it IS in the same language as the primary audio track.
if (offset)
return 0;
} else {
languageList.append(defaultLanguage());
// Only enable a text track if the current audio track is NOT in the user's preferred language ...
size_t offset = indexOfBestMatchingLanguageInList(audioTrackLanguage, languageList, exactMatch);
if (!offset)
return 0;
// and the text track matches the user's preferred language.
offset = indexOfBestMatchingLanguageInList(textTrackLanguage, languageList, exactMatch);
if (offset)
return 0;
}
userPreferredCaptionLanguages = languageList;
}
int trackScore = 0;
if (userPrefersCaptions()) {
// When the user prefers accessibility tracks, rank is SDH, then CC, then subtitles.
if (track->kind() == TextTrack::Kind::Subtitles)
trackScore = 1;
else if (track->isClosedCaptions())
trackScore = 2;
else
trackScore = 3;
} else {
// When the user prefers translation tracks, rank is subtitles, then SDH, then CC tracks.
if (track->kind() == TextTrack::Kind::Subtitles)
trackScore = 3;
else if (!track->isClosedCaptions())
trackScore = 2;
else
trackScore = 1;
}
return trackScore + textTrackLanguageSelectionScore(track, userPreferredCaptionLanguages);
}
int CaptionUserPreferences::textTrackLanguageSelectionScore(TextTrack* track, const Vector<String>& preferredLanguages) const
{
if (track->validBCP47Language().isEmpty())
return 0;
bool exactMatch;
size_t languageMatchIndex = indexOfBestMatchingLanguageInList(track->validBCP47Language(), preferredLanguages, exactMatch);
if (languageMatchIndex >= preferredLanguages.size())
return 0;
// Matching a track language is more important than matching track type, so this multiplier must be
// greater than the maximum value returned by textTrackSelectionScore.
int bonus = exactMatch ? 1 : 0;
return (preferredLanguages.size() + bonus - languageMatchIndex) * 10;
}
void CaptionUserPreferences::setCaptionsStyleSheetOverride(const String& override)
{
if (override == m_captionsStyleSheetOverride)
return;
m_captionsStyleSheetOverride = override;
updateCaptionStyleSheetOverride();
if (!m_timer.isActive())
m_timer.startOneShot(0_s);
}
void CaptionUserPreferences::updateCaptionStyleSheetOverride()
{
String captionsOverrideStyleSheet = captionsStyleSheetOverride();
for (auto& page : m_pageGroup.pages())
page->setCaptionUserPreferencesStyleSheet(captionsOverrideStyleSheet);
}
String CaptionUserPreferences::primaryAudioTrackLanguageOverride() const
{
if (!m_primaryAudioTrackLanguageOverride.isEmpty())
return m_primaryAudioTrackLanguageOverride;
return defaultLanguage();
}
}
#endif // ENABLE(VIDEO)