blob: 7c55ddfed7d2b461bae070ec28b15ace40abf93c [file] [log] [blame]
/*
* Copyright (C) 2013, 2014 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"
#if ENABLE(VIDEO_TRACK)
#include "TextTrackCueGeneric.h"
#include "CSSPropertyNames.h"
#include "CSSStyleDeclaration.h"
#include "CSSValueKeywords.h"
#include "HTMLSpanElement.h"
#include "InbandTextTrackPrivateClient.h"
#include "Logging.h"
#include "RenderObject.h"
#include "ScriptExecutionContext.h"
#include "StyleProperties.h"
#include "TextTrackCue.h"
#include <wtf/IsoMallocInlines.h>
#include <wtf/MathExtras.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(TextTrackCueGeneric);
// This default value must be the same as the one specified in mediaControlsApple.css for -webkit-media-controls-closed-captions-container
const static int DEFAULTCAPTIONFONTSIZE = 10;
class TextTrackCueGenericBoxElement final : public VTTCueBox {
WTF_MAKE_ISO_ALLOCATED_INLINE(TextTrackCueGenericBoxElement);
public:
static Ref<TextTrackCueGenericBoxElement> create(Document& document, TextTrackCueGeneric& cue)
{
return adoptRef(*new TextTrackCueGenericBoxElement(document, cue));
}
void applyCSSProperties(const IntSize&) override;
private:
TextTrackCueGenericBoxElement(Document&, VTTCue&);
};
TextTrackCueGenericBoxElement::TextTrackCueGenericBoxElement(Document& document, VTTCue& cue)
: VTTCueBox(document, cue)
{
}
void TextTrackCueGenericBoxElement::applyCSSProperties(const IntSize& videoSize)
{
RefPtr<TextTrackCueGeneric> cue = static_cast<TextTrackCueGeneric*>(getCue());
if (!cue)
return;
setInlineStyleProperty(CSSPropertyPosition, CSSValueAbsolute);
setInlineStyleProperty(CSSPropertyUnicodeBidi, CSSValuePlaintext);
Ref<HTMLSpanElement> cueElement = cue->element();
double textPosition = cue->calculateComputedTextPosition();
CSSValueID alignment = cue->getCSSAlignment();
float size = static_cast<float>(cue->getCSSSize());
if (cue->useDefaultPosition()) {
setInlineStyleProperty(CSSPropertyBottom, 0, CSSPrimitiveValue::CSS_PX);
setInlineStyleProperty(CSSPropertyMarginBottom, 1.0, CSSPrimitiveValue::CSS_PERCENTAGE);
} else {
setInlineStyleProperty(CSSPropertyLeft, static_cast<float>(textPosition), CSSPrimitiveValue::CSS_PERCENTAGE);
setInlineStyleProperty(CSSPropertyTop, static_cast<float>(cue->line()), CSSPrimitiveValue::CSS_PERCENTAGE);
double authorFontSize = videoSize.height() * cue->baseFontSizeRelativeToVideoHeight() / 100.0;
if (!authorFontSize)
authorFontSize = DEFAULTCAPTIONFONTSIZE;
if (cue->fontSizeMultiplier())
authorFontSize *= cue->fontSizeMultiplier() / 100;
double multiplier = fontSizeFromCaptionUserPrefs() / authorFontSize;
double newCueSize = std::min(size * multiplier, 100.0);
if (cue->getWritingDirection() == VTTCue::Horizontal) {
setInlineStyleProperty(CSSPropertyWidth, newCueSize, CSSPrimitiveValue::CSS_PERCENTAGE);
if ((alignment == CSSValueMiddle || alignment == CSSValueCenter) && multiplier != 1.0)
setInlineStyleProperty(CSSPropertyLeft, static_cast<double>(textPosition - (newCueSize - cue->getCSSSize()) / 2), CSSPrimitiveValue::CSS_PERCENTAGE);
} else {
setInlineStyleProperty(CSSPropertyHeight, newCueSize, CSSPrimitiveValue::CSS_PERCENTAGE);
if ((alignment == CSSValueMiddle || alignment == CSSValueCenter) && multiplier != 1.0)
setInlineStyleProperty(CSSPropertyTop, static_cast<double>(cue->line() - (newCueSize - cue->getCSSSize()) / 2), CSSPrimitiveValue::CSS_PERCENTAGE);
}
}
double maxSize = 100.0;
if (alignment == CSSValueEnd || alignment == CSSValueRight)
maxSize = textPosition;
else if (alignment == CSSValueStart || alignment == CSSValueLeft)
maxSize = 100.0 - textPosition;
if (cue->getWritingDirection() == VTTCue::Horizontal) {
setInlineStyleProperty(CSSPropertyMinWidth, "min-content");
setInlineStyleProperty(CSSPropertyMaxWidth, maxSize, CSSPrimitiveValue::CSS_PERCENTAGE);
} else {
setInlineStyleProperty(CSSPropertyMinHeight, "min-content");
setInlineStyleProperty(CSSPropertyMaxHeight, maxSize, CSSPrimitiveValue::CSS_PERCENTAGE);
}
if (cue->foregroundColor().isValid())
cueElement->setInlineStyleProperty(CSSPropertyColor, cue->foregroundColor().serialized());
if (cue->highlightColor().isValid())
cueElement->setInlineStyleProperty(CSSPropertyBackgroundColor, cue->highlightColor().serialized());
if (cue->getWritingDirection() == VTTCue::Horizontal)
setInlineStyleProperty(CSSPropertyHeight, CSSValueAuto);
else
setInlineStyleProperty(CSSPropertyWidth, CSSValueAuto);
if (cue->baseFontSizeRelativeToVideoHeight())
cue->setFontSize(cue->baseFontSizeRelativeToVideoHeight(), videoSize, false);
if (cue->getAlignment() == VTTCue::Center)
setInlineStyleProperty(CSSPropertyTextAlign, CSSValueCenter);
else if (cue->getAlignment() == VTTCue::End)
setInlineStyleProperty(CSSPropertyTextAlign, CSSValueEnd);
else
setInlineStyleProperty(CSSPropertyTextAlign, CSSValueStart);
if (cue->backgroundColor().isValid())
setInlineStyleProperty(CSSPropertyBackgroundColor, cue->backgroundColor().serialized());
setInlineStyleProperty(CSSPropertyWritingMode, cue->getCSSWritingMode(), false);
setInlineStyleProperty(CSSPropertyWhiteSpace, CSSValuePreWrap);
// Make sure shadow or stroke is not clipped.
setInlineStyleProperty(CSSPropertyOverflow, CSSValueVisible);
cueElement->setInlineStyleProperty(CSSPropertyOverflow, CSSValueVisible);
}
TextTrackCueGeneric::TextTrackCueGeneric(ScriptExecutionContext& context, const MediaTime& start, const MediaTime& end, const String& content)
: VTTCue(context, start, end, content)
, m_baseFontSizeRelativeToVideoHeight(0)
, m_fontSizeMultiplier(0)
{
}
Ref<VTTCueBox> TextTrackCueGeneric::createDisplayTree()
{
return TextTrackCueGenericBoxElement::create(ownerDocument(), *this);
}
ExceptionOr<void> TextTrackCueGeneric::setLine(double line)
{
auto result = VTTCue::setLine(line);
if (!result.hasException())
m_useDefaultPosition = false;
return result;
}
ExceptionOr<void> TextTrackCueGeneric::setPosition(const LineAndPositionSetting& position)
{
auto result = VTTCue::setPosition(position);
if (!result.hasException())
m_useDefaultPosition = false;
return result;
}
void TextTrackCueGeneric::setFontSize(int fontSize, const IntSize& videoSize, bool important)
{
if (!hasDisplayTree() || !fontSize)
return;
if (important || !baseFontSizeRelativeToVideoHeight()) {
VTTCue::setFontSize(fontSize, videoSize, important);
return;
}
double size = videoSize.height() * baseFontSizeRelativeToVideoHeight() / 100;
if (fontSizeMultiplier())
size *= fontSizeMultiplier() / 100;
displayTreeInternal().setInlineStyleProperty(CSSPropertyFontSize, lround(size), CSSPrimitiveValue::CSS_PX);
}
bool TextTrackCueGeneric::cueContentsMatch(const TextTrackCue& cue) const
{
// Do call the parent class cueContentsMatch here, because we want to confirm
// the content of the two cues are identical (even though the types are not the same).
if (!VTTCue::cueContentsMatch(cue))
return false;
const TextTrackCueGeneric* other = static_cast<const TextTrackCueGeneric*>(&cue);
if (m_baseFontSizeRelativeToVideoHeight != other->baseFontSizeRelativeToVideoHeight())
return false;
if (m_fontSizeMultiplier != other->fontSizeMultiplier())
return false;
if (m_fontName != other->fontName())
return false;
if (m_foregroundColor != other->foregroundColor())
return false;
if (m_backgroundColor != other->backgroundColor())
return false;
return true;
}
bool TextTrackCueGeneric::isEqual(const TextTrackCue& cue, TextTrackCue::CueMatchRules match) const
{
// Do not call the parent class isEqual here, because we are not cueType() == VTTCue,
// and will fail that equality test.
if (!TextTrackCue::isEqual(cue, match))
return false;
if (cue.cueType() != TextTrackCue::Generic)
return false;
return cueContentsMatch(cue);
}
bool TextTrackCueGeneric::doesExtendCue(const TextTrackCue& cue) const
{
if (!cueContentsMatch(cue))
return false;
return VTTCue::doesExtendCue(cue);
}
bool TextTrackCueGeneric::isOrderedBefore(const TextTrackCue* that) const
{
if (VTTCue::isOrderedBefore(that))
return true;
if (that->cueType() == Generic && startTime() == that->startTime() && endTime() == that->endTime()) {
// Further order generic cues by their calculated line value.
std::pair<double, double> thisPosition = getPositionCoordinates();
std::pair<double, double> thatPosition = toVTTCue(that)->getPositionCoordinates();
return thisPosition.second > thatPosition.second || (thisPosition.second == thatPosition.second && thisPosition.first < thatPosition.first);
}
return false;
}
bool TextTrackCueGeneric::isPositionedAbove(const TextTrackCue* that) const
{
if (that->cueType() == Generic && startTime() == that->startTime() && endTime() == that->endTime()) {
// Further order generic cues by their calculated line value.
std::pair<double, double> thisPosition = getPositionCoordinates();
std::pair<double, double> thatPosition = toVTTCue(that)->getPositionCoordinates();
return thisPosition.second > thatPosition.second || (thisPosition.second == thatPosition.second && thisPosition.first < thatPosition.first);
}
if (that->cueType() == Generic)
return startTime() > that->startTime();
return VTTCue::isOrderedBefore(that);
}
String TextTrackCueGeneric::toJSONString() const
{
auto object = JSON::Object::create();
toJSON(object.get());
if (m_foregroundColor.isValid())
object->setString("foregroundColor"_s, m_foregroundColor.serialized());
if (m_backgroundColor.isValid())
object->setString("backgroundColor"_s, m_backgroundColor.serialized());
if (m_highlightColor.isValid())
object->setString("highlightColor"_s, m_highlightColor.serialized());
if (m_baseFontSizeRelativeToVideoHeight)
object->setDouble("relativeFontSize"_s, m_baseFontSizeRelativeToVideoHeight);
if (m_fontSizeMultiplier)
object->setDouble("fontSizeMultiplier"_s, m_fontSizeMultiplier);
if (!m_fontName.isEmpty())
object->setString("font"_s, m_fontName);
return object->toJSONString();
}
} // namespace WebCore
#endif