Index: Source/core/html/track/TextTrackCue.cpp |
diff --git a/Source/core/html/track/TextTrackCue.cpp b/Source/core/html/track/TextTrackCue.cpp |
index 65ebc78add7bcc7d369a4b1f91b81fdb05838b05..2a151296030af22c8e96f8e2a3670260be2c4664 100644 |
--- a/Source/core/html/track/TextTrackCue.cpp |
+++ b/Source/core/html/track/TextTrackCue.cpp |
@@ -32,8 +32,6 @@ |
#include "config.h" |
#include "core/html/track/TextTrackCue.h" |
-#include "CSSPropertyNames.h" |
-#include "CSSValueKeywords.h" |
#include "RuntimeEnabledFeatures.h" |
#include "bindings/v8/ExceptionStatePlaceholder.h" |
#include "core/dom/DocumentFragment.h" |
@@ -42,200 +40,29 @@ |
#include "core/html/HTMLDivElement.h" |
#include "core/html/track/TextTrack.h" |
#include "core/html/track/TextTrackCueList.h" |
-#include "core/html/track/vtt/VTTElement.h" |
-#include "core/html/track/vtt/VTTParser.h" |
-#include "core/html/track/vtt/VTTRegionList.h" |
#include "core/rendering/RenderTextTrackCue.h" |
-#include "wtf/MathExtras.h" |
-#include "wtf/text/StringBuilder.h" |
namespace WebCore { |
static const int invalidCueIndex = -1; |
-static const int undefinedPosition = -1; |
- |
-static const CSSValueID displayWritingModeMap[] = { |
- CSSValueHorizontalTb, CSSValueVerticalRl, CSSValueVerticalLr |
-}; |
-COMPILE_ASSERT(WTF_ARRAY_LENGTH(displayWritingModeMap) == TextTrackCue::NumberOfWritingDirections, |
- displayWritingModeMap_has_wrong_size); |
- |
-static const CSSValueID displayAlignmentMap[] = { |
- CSSValueStart, CSSValueCenter, CSSValueEnd, CSSValueLeft, CSSValueRight |
-}; |
-COMPILE_ASSERT(WTF_ARRAY_LENGTH(displayAlignmentMap) == TextTrackCue::NumberOfAlignments, |
- displayAlignmentMap_has_wrong_size); |
- |
-static const String& startKeyword() |
-{ |
- DEFINE_STATIC_LOCAL(const String, start, ("start")); |
- return start; |
-} |
- |
-static const String& middleKeyword() |
-{ |
- DEFINE_STATIC_LOCAL(const String, middle, ("middle")); |
- return middle; |
-} |
- |
-static const String& endKeyword() |
-{ |
- DEFINE_STATIC_LOCAL(const String, end, ("end")); |
- return end; |
-} |
- |
-static const String& leftKeyword() |
-{ |
- DEFINE_STATIC_LOCAL(const String, left, ("left")); |
- return left; |
-} |
- |
-static const String& rightKeyword() |
-{ |
- DEFINE_STATIC_LOCAL(const String, right, ("right")); |
- return right; |
-} |
- |
-static const String& horizontalKeyword() |
-{ |
- return emptyString(); |
-} |
- |
-static const String& verticalGrowingLeftKeyword() |
-{ |
- DEFINE_STATIC_LOCAL(const String, verticalrl, ("rl")); |
- return verticalrl; |
-} |
- |
-static const String& verticalGrowingRightKeyword() |
-{ |
- DEFINE_STATIC_LOCAL(const String, verticallr, ("lr")); |
- return verticallr; |
-} |
// ---------------------------- |
-TextTrackCueBox::TextTrackCueBox(Document& document, TextTrackCue* cue) |
+TextTrackCueBox::TextTrackCueBox(Document& document) |
: HTMLDivElement(document) |
- , m_cue(cue) |
-{ |
- setPart(textTrackCueBoxShadowPseudoId()); |
-} |
- |
-TextTrackCue* TextTrackCueBox::getCue() const |
-{ |
- return m_cue; |
-} |
- |
-void TextTrackCueBox::applyCSSProperties(const IntSize&) |
-{ |
- // FIXME: Apply all the initial CSS positioning properties. http://wkb.ug/79916 |
- if (!m_cue->regionId().isEmpty()) { |
- setInlineStyleProperty(CSSPropertyPosition, CSSValueRelative); |
- return; |
- } |
- |
- // 3.5.1 On the (root) List of WebVTT Node Objects: |
- |
- // the 'position' property must be set to 'absolute' |
- setInlineStyleProperty(CSSPropertyPosition, CSSValueAbsolute); |
- |
- // the 'unicode-bidi' property must be set to 'plaintext' |
- setInlineStyleProperty(CSSPropertyUnicodeBidi, CSSValueWebkitPlaintext); |
- |
- // the 'direction' property must be set to direction |
- setInlineStyleProperty(CSSPropertyDirection, m_cue->getCSSWritingDirection()); |
- |
- // the 'writing-mode' property must be set to writing-mode |
- setInlineStyleProperty(CSSPropertyWebkitWritingMode, m_cue->getCSSWritingMode()); |
- |
- std::pair<float, float> position = m_cue->getCSSPosition(); |
- |
- // the 'top' property must be set to top, |
- setInlineStyleProperty(CSSPropertyTop, position.second, CSSPrimitiveValue::CSS_PERCENTAGE); |
- |
- // the 'left' property must be set to left |
- setInlineStyleProperty(CSSPropertyLeft, position.first, CSSPrimitiveValue::CSS_PERCENTAGE); |
- |
- // the 'width' property must be set to width, and the 'height' property must be set to height |
- if (m_cue->vertical() == horizontalKeyword()) { |
- setInlineStyleProperty(CSSPropertyWidth, static_cast<double>(m_cue->getCSSSize()), CSSPrimitiveValue::CSS_PERCENTAGE); |
- setInlineStyleProperty(CSSPropertyHeight, CSSValueAuto); |
- } else { |
- setInlineStyleProperty(CSSPropertyWidth, CSSValueAuto); |
- setInlineStyleProperty(CSSPropertyHeight, static_cast<double>(m_cue->getCSSSize()), CSSPrimitiveValue::CSS_PERCENTAGE); |
- } |
- |
- // The 'text-align' property on the (root) List of WebVTT Node Objects must |
- // be set to the value in the second cell of the row of the table below |
- // whose first cell is the value of the corresponding cue's text track cue |
- // alignment: |
- setInlineStyleProperty(CSSPropertyTextAlign, m_cue->getCSSAlignment()); |
- |
- if (!m_cue->snapToLines()) { |
- // 10.13.1 Set up x and y: |
- // Note: x and y are set through the CSS left and top above. |
- |
- // 10.13.2 Position the boxes in boxes such that the point x% along the |
- // width of the bounding box of the boxes in boxes is x% of the way |
- // across the width of the video's rendering area, and the point y% |
- // along the height of the bounding box of the boxes in boxes is y% |
- // of the way across the height of the video's rendering area, while |
- // maintaining the relative positions of the boxes in boxes to each |
- // other. |
- setInlineStyleProperty(CSSPropertyWebkitTransform, |
- String::format("translate(-%.2f%%, -%.2f%%)", position.first, position.second)); |
- |
- setInlineStyleProperty(CSSPropertyWhiteSpace, CSSValuePre); |
- } |
-} |
- |
-const AtomicString& TextTrackCueBox::textTrackCueBoxShadowPseudoId() |
{ |
- DEFINE_STATIC_LOCAL(const AtomicString, trackDisplayBoxShadowPseudoId, ("-webkit-media-text-track-display", AtomicString::ConstructFromLiteral)); |
- return trackDisplayBoxShadowPseudoId; |
-} |
- |
-RenderObject* TextTrackCueBox::createRenderer(RenderStyle*) |
-{ |
- return new RenderTextTrackCue(this); |
} |
// ---------------------------- |
-TextTrackCue::TextTrackCue(Document& document, double start, double end, const String& content) |
+TextTrackCue::TextTrackCue(double start, double end) |
: m_startTime(start) |
, m_endTime(end) |
- , m_content(content) |
- , m_linePosition(undefinedPosition) |
- , m_computedLinePosition(undefinedPosition) |
- , m_textPosition(50) |
- , m_cueSize(100) |
, m_cueIndex(invalidCueIndex) |
- , m_writingDirection(Horizontal) |
- , m_cueAlignment(Middle) |
- , m_webVTTNodeTree(0) |
, m_track(0) |
, m_isActive(false) |
, m_pauseOnExit(false) |
- , m_snapToLines(true) |
- , m_cueBackgroundBox(HTMLDivElement::create(document)) |
- , m_displayTreeShouldChange(true) |
- , m_displayDirection(CSSValueLtr) |
- , m_notifyRegion(true) |
-{ |
-} |
- |
-TextTrackCue::~TextTrackCue() |
{ |
- displayTreeInternal()->remove(ASSERT_NO_EXCEPTION); |
-} |
- |
-PassRefPtr<TextTrackCueBox> TextTrackCue::displayTreeInternal() |
-{ |
- if (!m_displayTree) |
- m_displayTree = TextTrackCueBox::create(document(), this); |
- return m_displayTree; |
} |
void TextTrackCue::cueWillChange() |
@@ -248,8 +75,6 @@ void TextTrackCue::cueDidChange() |
{ |
if (m_track) |
m_track->cueDidChange(this); |
- |
- m_displayTreeShouldChange = true; |
} |
TextTrack* TextTrackCue::track() const |
@@ -316,177 +141,6 @@ void TextTrackCue::setPauseOnExit(bool value) |
cueDidChange(); |
} |
-const String& TextTrackCue::vertical() const |
-{ |
- switch (m_writingDirection) { |
- case Horizontal: |
- return horizontalKeyword(); |
- case VerticalGrowingLeft: |
- return verticalGrowingLeftKeyword(); |
- case VerticalGrowingRight: |
- return verticalGrowingRightKeyword(); |
- default: |
- ASSERT_NOT_REACHED(); |
- return emptyString(); |
- } |
-} |
- |
-void TextTrackCue::setVertical(const String& value, ExceptionState& exceptionState) |
-{ |
- // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#dom-texttrackcue-vertical |
- // On setting, the text track cue writing direction must be set to the value given |
- // in the first cell of the row in the table above whose second cell is a |
- // case-sensitive match for the new value, if any. If none of the values match, then |
- // the user agent must instead throw a SyntaxError exception. |
- |
- WritingDirection direction = m_writingDirection; |
- if (value == horizontalKeyword()) |
- direction = Horizontal; |
- else if (value == verticalGrowingLeftKeyword()) |
- direction = VerticalGrowingLeft; |
- else if (value == verticalGrowingRightKeyword()) |
- direction = VerticalGrowingRight; |
- else |
- exceptionState.throwUninformativeAndGenericDOMException(SyntaxError); |
- |
- if (direction == m_writingDirection) |
- return; |
- |
- cueWillChange(); |
- m_writingDirection = direction; |
- cueDidChange(); |
-} |
- |
-void TextTrackCue::setSnapToLines(bool value) |
-{ |
- if (m_snapToLines == value) |
- return; |
- |
- cueWillChange(); |
- m_snapToLines = value; |
- cueDidChange(); |
-} |
- |
-void TextTrackCue::setLine(int position, ExceptionState& exceptionState) |
-{ |
- // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#dom-texttrackcue-line |
- // On setting, if the text track cue snap-to-lines flag is not set, and the new |
- // value is negative or greater than 100, then throw an IndexSizeError exception. |
- if (!m_snapToLines && (position < 0 || position > 100)) { |
- exceptionState.throwUninformativeAndGenericDOMException(IndexSizeError); |
- return; |
- } |
- |
- // Otherwise, set the text track cue line position to the new value. |
- if (m_linePosition == position) |
- return; |
- |
- cueWillChange(); |
- m_linePosition = position; |
- m_computedLinePosition = calculateComputedLinePosition(); |
- cueDidChange(); |
-} |
- |
-void TextTrackCue::setPosition(int position, ExceptionState& exceptionState) |
-{ |
- // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#dom-texttrackcue-position |
- // On setting, if the new value is negative or greater than 100, then throw an IndexSizeError exception. |
- // Otherwise, set the text track cue text position to the new value. |
- if (position < 0 || position > 100) { |
- exceptionState.throwUninformativeAndGenericDOMException(IndexSizeError); |
- return; |
- } |
- |
- // Otherwise, set the text track cue line position to the new value. |
- if (m_textPosition == position) |
- return; |
- |
- cueWillChange(); |
- m_textPosition = position; |
- cueDidChange(); |
-} |
- |
-void TextTrackCue::setSize(int size, ExceptionState& exceptionState) |
-{ |
- // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#dom-texttrackcue-size |
- // On setting, if the new value is negative or greater than 100, then throw an IndexSizeError |
- // exception. Otherwise, set the text track cue size to the new value. |
- if (size < 0 || size > 100) { |
- exceptionState.throwUninformativeAndGenericDOMException(IndexSizeError); |
- return; |
- } |
- |
- // Otherwise, set the text track cue line position to the new value. |
- if (m_cueSize == size) |
- return; |
- |
- cueWillChange(); |
- m_cueSize = size; |
- cueDidChange(); |
-} |
- |
-const String& TextTrackCue::align() const |
-{ |
- switch (m_cueAlignment) { |
- case Start: |
- return startKeyword(); |
- case Middle: |
- return middleKeyword(); |
- case End: |
- return endKeyword(); |
- case Left: |
- return leftKeyword(); |
- case Right: |
- return rightKeyword(); |
- default: |
- ASSERT_NOT_REACHED(); |
- return emptyString(); |
- } |
-} |
- |
-void TextTrackCue::setAlign(const String& value, ExceptionState& exceptionState) |
-{ |
- // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#dom-texttrackcue-align |
- // On setting, the text track cue alignment must be set to the value given in the |
- // first cell of the row in the table above whose second cell is a case-sensitive |
- // match for the new value, if any. If none of the values match, then the user |
- // agent must instead throw a SyntaxError exception. |
- |
- CueAlignment alignment = m_cueAlignment; |
- if (value == startKeyword()) |
- alignment = Start; |
- else if (value == middleKeyword()) |
- alignment = Middle; |
- else if (value == endKeyword()) |
- alignment = End; |
- else if (value == leftKeyword()) |
- alignment = Left; |
- else if (value == rightKeyword()) |
- alignment = Right; |
- else |
- exceptionState.throwUninformativeAndGenericDOMException(SyntaxError); |
- |
- if (alignment == m_cueAlignment) |
- return; |
- |
- cueWillChange(); |
- m_cueAlignment = alignment; |
- cueDidChange(); |
-} |
- |
-void TextTrackCue::setText(const String& text) |
-{ |
- if (m_content == text) |
- return; |
- |
- cueWillChange(); |
- // Clear the document fragment but don't bother to create it again just yet as we can do that |
- // when it is requested. |
- m_webVTTNodeTree = 0; |
- m_content = text; |
- cueDidChange(); |
-} |
- |
int TextTrackCue::cueIndex() |
{ |
if (m_cueIndex == invalidCueIndex) |
@@ -500,43 +154,6 @@ void TextTrackCue::invalidateCueIndex() |
m_cueIndex = invalidCueIndex; |
} |
-void TextTrackCue::createVTTNodeTree() |
-{ |
- if (!m_webVTTNodeTree) |
- m_webVTTNodeTree = VTTParser::createDocumentFragmentFromCueText(document(), m_content); |
-} |
- |
-void TextTrackCue::copyVTTNodeToDOMTree(ContainerNode* webVTTNode, ContainerNode* parent) |
-{ |
- for (Node* node = webVTTNode->firstChild(); node; node = node->nextSibling()) { |
- RefPtr<Node> clonedNode; |
- if (node->isVTTElement()) |
- clonedNode = toVTTElement(node)->createEquivalentHTMLElement(document()); |
- else |
- clonedNode = node->cloneNode(false); |
- parent->appendChild(clonedNode); |
- if (node->isContainerNode()) |
- copyVTTNodeToDOMTree(toContainerNode(node), toContainerNode(clonedNode)); |
- } |
-} |
- |
-PassRefPtr<DocumentFragment> TextTrackCue::getCueAsHTML() |
-{ |
- createVTTNodeTree(); |
- RefPtr<DocumentFragment> clonedFragment = DocumentFragment::create(document()); |
- copyVTTNodeToDOMTree(m_webVTTNodeTree.get(), clonedFragment.get()); |
- return clonedFragment.release(); |
-} |
- |
-PassRefPtr<DocumentFragment> TextTrackCue::createCueRenderingTree() |
-{ |
- RefPtr<DocumentFragment> clonedFragment; |
- createVTTNodeTree(); |
- clonedFragment = DocumentFragment::create(document()); |
- m_webVTTNodeTree->cloneChildNodes(clonedFragment.get()); |
- return clonedFragment.release(); |
-} |
- |
bool TextTrackCue::dispatchEvent(PassRefPtr<Event> event) |
{ |
// When a TextTrack's mode is disabled: no cues are active, no events fired. |
@@ -546,21 +163,6 @@ bool TextTrackCue::dispatchEvent(PassRefPtr<Event> event) |
return EventTarget::dispatchEvent(event); |
} |
-void TextTrackCue::setRegionId(const String& regionId) |
-{ |
- if (m_regionId == regionId) |
- return; |
- |
- cueWillChange(); |
- m_regionId = regionId; |
- cueDidChange(); |
-} |
- |
-void TextTrackCue::notifyRegionWhenRemovingDisplayTree(bool notifyRegion) |
-{ |
- m_notifyRegion = notifyRegion; |
-} |
- |
bool TextTrackCue::isActive() |
{ |
return m_isActive && track() && track()->mode() != TextTrack::disabledKeyword(); |
@@ -575,633 +177,9 @@ void TextTrackCue::setIsActive(bool active) |
removeDisplayTree(); |
} |
-int TextTrackCue::calculateComputedLinePosition() |
-{ |
- // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#text-track-cue-computed-line-position |
- |
- // If the text track cue line position is numeric, then that is the text |
- // track cue computed line position. |
- if (m_linePosition != undefinedPosition) |
- return m_linePosition; |
- |
- // If the text track cue snap-to-lines flag of the text track cue is not |
- // set, the text track cue computed line position is the value 100; |
- if (!m_snapToLines) |
- return 100; |
- |
- // Otherwise, it is the value returned by the following algorithm: |
- |
- // If cue is not associated with a text track, return -1 and abort these |
- // steps. |
- if (!track()) |
- return -1; |
- |
- // Let n be the number of text tracks whose text track mode is showing or |
- // showing by default and that are in the media element's list of text |
- // tracks before track. |
- int n = track()->trackIndexRelativeToRenderedTracks(); |
- |
- // Increment n by one. |
- n++; |
- |
- // Negate n. |
- n = -n; |
- |
- return n; |
-} |
- |
-static bool isCueParagraphSeparator(UChar character) |
-{ |
- // Within a cue, paragraph boundaries are only denoted by Type B characters, |
- // such as U+000A LINE FEED (LF), U+0085 NEXT LINE (NEL), and U+2029 PARAGRAPH SEPARATOR. |
- return WTF::Unicode::category(character) & WTF::Unicode::Separator_Paragraph; |
-} |
- |
-void TextTrackCue::determineTextDirection() |
-{ |
- DEFINE_STATIC_LOCAL(const String, rtTag, ("rt")); |
- createVTTNodeTree(); |
- |
- // Apply the Unicode Bidirectional Algorithm's Paragraph Level steps to the |
- // concatenation of the values of each WebVTT Text Object in nodes, in a |
- // pre-order, depth-first traversal, excluding WebVTT Ruby Text Objects and |
- // their descendants. |
- StringBuilder paragraphBuilder; |
- for (Node* node = m_webVTTNodeTree->firstChild(); node; node = NodeTraversal::next(*node, m_webVTTNodeTree.get())) { |
- if (!node->isTextNode() || node->localName() == rtTag) |
- continue; |
- |
- paragraphBuilder.append(node->nodeValue()); |
- } |
- |
- String paragraph = paragraphBuilder.toString(); |
- if (!paragraph.length()) |
- return; |
- |
- for (size_t i = 0; i < paragraph.length(); ++i) { |
- UChar current = paragraph[i]; |
- if (!current || isCueParagraphSeparator(current)) |
- return; |
- |
- if (UChar current = paragraph[i]) { |
- WTF::Unicode::Direction charDirection = WTF::Unicode::direction(current); |
- if (charDirection == WTF::Unicode::LeftToRight) { |
- m_displayDirection = CSSValueLtr; |
- return; |
- } |
- if (charDirection == WTF::Unicode::RightToLeft |
- || charDirection == WTF::Unicode::RightToLeftArabic) { |
- m_displayDirection = CSSValueRtl; |
- return; |
- } |
- } |
- } |
-} |
- |
-void TextTrackCue::calculateDisplayParameters() |
-{ |
- // Steps 10.2, 10.3 |
- determineTextDirection(); |
- |
- // 10.4 If the text track cue writing direction is horizontal, then let |
- // block-flow be 'tb'. Otherwise, if the text track cue writing direction is |
- // vertical growing left, then let block-flow be 'lr'. Otherwise, the text |
- // track cue writing direction is vertical growing right; let block-flow be |
- // 'rl'. |
- |
- // The above step is done through the writing direction static map. |
- |
- // 10.5 Determine the value of maximum size for cue as per the appropriate |
- // rules from the following list: |
- int maximumSize = m_textPosition; |
- if ((m_writingDirection == Horizontal && m_cueAlignment == Start && m_displayDirection == CSSValueLtr) |
- || (m_writingDirection == Horizontal && m_cueAlignment == End && m_displayDirection == CSSValueRtl) |
- || (m_writingDirection == Horizontal && m_cueAlignment == Left) |
- || (m_writingDirection == VerticalGrowingLeft && (m_cueAlignment == Start || m_cueAlignment == Left)) |
- || (m_writingDirection == VerticalGrowingRight && (m_cueAlignment == Start || m_cueAlignment == Left))) { |
- maximumSize = 100 - m_textPosition; |
- } else if ((m_writingDirection == Horizontal && m_cueAlignment == End && m_displayDirection == CSSValueLtr) |
- || (m_writingDirection == Horizontal && m_cueAlignment == Start && m_displayDirection == CSSValueRtl) |
- || (m_writingDirection == Horizontal && m_cueAlignment == Right) |
- || (m_writingDirection == VerticalGrowingLeft && (m_cueAlignment == End || m_cueAlignment == Right)) |
- || (m_writingDirection == VerticalGrowingRight && (m_cueAlignment == End || m_cueAlignment == Right))) { |
- maximumSize = m_textPosition; |
- } else if (m_cueAlignment == Middle) { |
- maximumSize = m_textPosition <= 50 ? m_textPosition : (100 - m_textPosition); |
- maximumSize = maximumSize * 2; |
- } else { |
- ASSERT_NOT_REACHED(); |
- } |
- |
- // 10.6 If the text track cue size is less than maximum size, then let size |
- // be text track cue size. Otherwise, let size be maximum size. |
- m_displaySize = std::min(m_cueSize, maximumSize); |
- |
- // FIXME: Understand why step 10.7 is missing (just a copy/paste error?) |
- // Could be done within a spec implementation check - http://crbug.com/301580 |
- |
- // 10.8 Determine the value of x-position or y-position for cue as per the |
- // appropriate rules from the following list: |
- if (m_writingDirection == Horizontal) { |
- switch (m_cueAlignment) { |
- case Start: |
- if (m_displayDirection == CSSValueLtr) |
- m_displayPosition.first = m_textPosition; |
- else |
- m_displayPosition.first = 100 - m_textPosition - m_displaySize; |
- break; |
- case End: |
- if (m_displayDirection == CSSValueRtl) |
- m_displayPosition.first = 100 - m_textPosition; |
- else |
- m_displayPosition.first = m_textPosition - m_displaySize; |
- break; |
- case Left: |
- if (m_displayDirection == CSSValueLtr) |
- m_displayPosition.first = m_textPosition; |
- else |
- m_displayPosition.first = 100 - m_textPosition; |
- break; |
- case Right: |
- if (m_displayDirection == CSSValueLtr) |
- m_displayPosition.first = m_textPosition - m_displaySize; |
- else |
- m_displayPosition.first = 100 - m_textPosition - m_displaySize; |
- break; |
- case Middle: |
- if (m_displayDirection == CSSValueLtr) |
- m_displayPosition.first = m_textPosition - m_displaySize / 2; |
- else |
- m_displayPosition.first = 100 - m_textPosition - m_displaySize / 2; |
- break; |
- case NumberOfAlignments: |
- ASSERT_NOT_REACHED(); |
- } |
- } else { |
- // Cases for m_writingDirection being VerticalGrowing{Left|Right} |
- switch (m_cueAlignment) { |
- case Start: |
- case Left: |
- m_displayPosition.second = m_textPosition; |
- break; |
- case End: |
- case Right: |
- m_displayPosition.second = m_textPosition - m_displaySize; |
- break; |
- case Middle: |
- m_displayPosition.second = m_textPosition - m_displaySize / 2; |
- break; |
- case NumberOfAlignments: |
- ASSERT_NOT_REACHED(); |
- } |
- } |
- |
- // A text track cue has a text track cue computed line position whose value |
- // is defined in terms of the other aspects of the cue. |
- m_computedLinePosition = calculateComputedLinePosition(); |
- |
- // 10.9 Determine the value of whichever of x-position or y-position is not |
- // yet calculated for cue as per the appropriate rules from the following |
- // list: |
- if (m_snapToLines && m_displayPosition.second == undefinedPosition && m_writingDirection == Horizontal) |
- m_displayPosition.second = 0; |
- |
- if (!m_snapToLines && m_displayPosition.second == undefinedPosition && m_writingDirection == Horizontal) |
- m_displayPosition.second = m_computedLinePosition; |
- |
- if (m_snapToLines && m_displayPosition.first == undefinedPosition |
- && (m_writingDirection == VerticalGrowingLeft || m_writingDirection == VerticalGrowingRight)) |
- m_displayPosition.first = 0; |
- |
- if (!m_snapToLines && (m_writingDirection == VerticalGrowingLeft || m_writingDirection == VerticalGrowingRight)) |
- m_displayPosition.first = m_computedLinePosition; |
-} |
- |
-void TextTrackCue::markFutureAndPastNodes(ContainerNode* root, double previousTimestamp, double movieTime) |
-{ |
- DEFINE_STATIC_LOCAL(const String, timestampTag, ("timestamp")); |
- |
- bool isPastNode = true; |
- double currentTimestamp = previousTimestamp; |
- if (currentTimestamp > movieTime) |
- isPastNode = false; |
- |
- for (Node* child = root->firstChild(); child; child = NodeTraversal::next(*child, root)) { |
- if (child->nodeName() == timestampTag) { |
- unsigned position = 0; |
- String timestamp = child->nodeValue(); |
- double currentTimestamp = VTTParser::collectTimeStamp(timestamp, &position); |
- ASSERT(currentTimestamp != -1); |
- |
- if (currentTimestamp > movieTime) |
- isPastNode = false; |
- } |
- |
- if (child->isVTTElement()) { |
- toVTTElement(child)->setIsPastNode(isPastNode); |
- // Make an elemenet id match a cue id for style matching purposes. |
- if (!m_id.isEmpty()) |
- toElement(child)->setIdAttribute(m_id); |
- } |
- } |
-} |
- |
-void TextTrackCue::updateDisplayTree(double movieTime) |
-{ |
- // The display tree may contain WebVTT timestamp objects representing |
- // timestamps (processing instructions), along with displayable nodes. |
- |
- if (!track()->isRendered()) |
- return; |
- |
- // Clear the contents of the set. |
- m_cueBackgroundBox->removeChildren(); |
- |
- // Update the two sets containing past and future WebVTT objects. |
- RefPtr<DocumentFragment> referenceTree = createCueRenderingTree(); |
- markFutureAndPastNodes(referenceTree.get(), startTime(), movieTime); |
- m_cueBackgroundBox->appendChild(referenceTree, ASSERT_NO_EXCEPTION); |
-} |
- |
-PassRefPtr<TextTrackCueBox> TextTrackCue::getDisplayTree(const IntSize& videoSize) |
-{ |
- RefPtr<TextTrackCueBox> displayTree = displayTreeInternal(); |
- if (!m_displayTreeShouldChange || !track()->isRendered()) |
- return displayTree; |
- |
- // 10.1 - 10.10 |
- calculateDisplayParameters(); |
- |
- // 10.11. Apply the terms of the CSS specifications to nodes within the |
- // following constraints, thus obtaining a set of CSS boxes positioned |
- // relative to an initial containing block: |
- displayTree->removeChildren(); |
- |
- // The document tree is the tree of WebVTT Node Objects rooted at nodes. |
- |
- // The children of the nodes must be wrapped in an anonymous box whose |
- // 'display' property has the value 'inline'. This is the WebVTT cue |
- // background box. |
- |
- // Note: This is contained by default in m_cueBackgroundBox. |
- m_cueBackgroundBox->setPart(cueShadowPseudoId()); |
- displayTree->appendChild(m_cueBackgroundBox); |
- |
- // FIXME(BUG 79916): Runs of children of WebVTT Ruby Objects that are not |
- // WebVTT Ruby Text Objects must be wrapped in anonymous boxes whose |
- // 'display' property has the value 'ruby-base'. |
- |
- // FIXME(BUG 79916): Text runs must be wrapped according to the CSS |
- // line-wrapping rules, except that additionally, regardless of the value of |
- // the 'white-space' property, lines must be wrapped at the edge of their |
- // containing blocks, even if doing so requires splitting a word where there |
- // is no line breaking opportunity. (Thus, normally text wraps as needed, |
- // but if there is a particularly long word, it does not overflow as it |
- // normally would in CSS, it is instead forcibly wrapped at the box's edge.) |
- displayTree->applyCSSProperties(videoSize); |
- |
- m_displayTreeShouldChange = false; |
- |
- // 10.15. Let cue's text track cue display state have the CSS boxes in |
- // boxes. |
- return displayTree; |
-} |
- |
-void TextTrackCue::removeDisplayTree() |
-{ |
- if (m_notifyRegion && m_track->regions()) { |
- // The region needs to be informed about the cue removal. |
- VTTRegion* region = m_track->regions()->getRegionById(m_regionId); |
- if (region) |
- region->willRemoveTextTrackCueBox(m_displayTree.get()); |
- } |
- |
- displayTreeInternal()->remove(ASSERT_NO_EXCEPTION); |
-} |
- |
-std::pair<double, double> TextTrackCue::getPositionCoordinates() const |
-{ |
- // This method is used for setting x and y when snap to lines is not set. |
- std::pair<double, double> coordinates; |
- |
- if (m_writingDirection == Horizontal && m_displayDirection == CSSValueLtr) { |
- coordinates.first = m_textPosition; |
- coordinates.second = m_computedLinePosition; |
- |
- return coordinates; |
- } |
- |
- if (m_writingDirection == Horizontal && m_displayDirection == CSSValueRtl) { |
- coordinates.first = 100 - m_textPosition; |
- coordinates.second = m_computedLinePosition; |
- |
- return coordinates; |
- } |
- |
- if (m_writingDirection == VerticalGrowingLeft) { |
- coordinates.first = 100 - m_computedLinePosition; |
- coordinates.second = m_textPosition; |
- |
- return coordinates; |
- } |
- |
- if (m_writingDirection == VerticalGrowingRight) { |
- coordinates.first = m_computedLinePosition; |
- coordinates.second = m_textPosition; |
- |
- return coordinates; |
- } |
- |
- ASSERT_NOT_REACHED(); |
- |
- return coordinates; |
-} |
- |
-TextTrackCue::CueSetting TextTrackCue::settingName(const String& name) |
-{ |
- DEFINE_STATIC_LOCAL(const String, verticalKeyword, ("vertical")); |
- DEFINE_STATIC_LOCAL(const String, lineKeyword, ("line")); |
- DEFINE_STATIC_LOCAL(const String, positionKeyword, ("position")); |
- DEFINE_STATIC_LOCAL(const String, sizeKeyword, ("size")); |
- DEFINE_STATIC_LOCAL(const String, alignKeyword, ("align")); |
- DEFINE_STATIC_LOCAL(const String, regionIdKeyword, ("region")); |
- |
- if (name == verticalKeyword) |
- return Vertical; |
- else if (name == lineKeyword) |
- return Line; |
- else if (name == positionKeyword) |
- return Position; |
- else if (name == sizeKeyword) |
- return Size; |
- else if (name == alignKeyword) |
- return Align; |
- else if (RuntimeEnabledFeatures::webVTTRegionsEnabled() && name == regionIdKeyword) |
- return RegionId; |
- |
- return None; |
-} |
- |
-void TextTrackCue::parseSettings(const String& input) |
-{ |
- unsigned position = 0; |
- |
- while (position < input.length()) { |
- |
- // The WebVTT cue settings part of a WebVTT cue consists of zero or more of the following components, in any order, |
- // separated from each other by one or more U+0020 SPACE characters or U+0009 CHARACTER TABULATION (tab) characters. |
- while (position < input.length() && VTTParser::isValidSettingDelimiter(input[position])) |
- position++; |
- if (position >= input.length()) |
- break; |
- |
- // When the user agent is to parse the WebVTT settings given by a string input for a text track cue cue, |
- // the user agent must run the following steps: |
- // 1. Let settings be the result of splitting input on spaces. |
- // 2. For each token setting in the list settings, run the following substeps: |
- // 1. If setting does not contain a U+003A COLON character (:), or if the first U+003A COLON character (:) |
- // in setting is either the first or last character of setting, then jump to the step labeled next setting. |
- unsigned endOfSetting = position; |
- String setting = VTTParser::collectWord(input, &endOfSetting); |
- CueSetting name; |
- size_t colonOffset = setting.find(':', 1); |
- if (colonOffset == kNotFound || !colonOffset || colonOffset == setting.length() - 1) |
- goto NextSetting; |
- |
- // 2. Let name be the leading substring of setting up to and excluding the first U+003A COLON character (:) in that string. |
- name = settingName(setting.substring(0, colonOffset)); |
- |
- // 3. Let value be the trailing substring of setting starting from the character immediately after the first U+003A COLON character (:) in that string. |
- position += colonOffset + 1; |
- if (position >= input.length()) |
- break; |
- |
- // 4. Run the appropriate substeps that apply for the value of name, as follows: |
- switch (name) { |
- case Vertical: |
- { |
- // If name is a case-sensitive match for "vertical" |
- // 1. If value is a case-sensitive match for the string "rl", then let cue's text track cue writing direction |
- // be vertical growing left. |
- String writingDirection = VTTParser::collectWord(input, &position); |
- if (writingDirection == verticalGrowingLeftKeyword()) |
- m_writingDirection = VerticalGrowingLeft; |
- |
- // 2. Otherwise, if value is a case-sensitive match for the string "lr", then let cue's text track cue writing |
- // direction be vertical growing right. |
- else if (writingDirection == verticalGrowingRightKeyword()) |
- m_writingDirection = VerticalGrowingRight; |
- } |
- break; |
- case Line: |
- { |
- // 1-2 - Collect chars that are either '-', '%', or a digit. |
- // 1. If value contains any characters other than U+002D HYPHEN-MINUS characters (-), U+0025 PERCENT SIGN |
- // characters (%), and characters in the range U+0030 DIGIT ZERO (0) to U+0039 DIGIT NINE (9), then jump |
- // to the step labeled next setting. |
- StringBuilder linePositionBuilder; |
- while (position < input.length() && (input[position] == '-' || input[position] == '%' || isASCIIDigit(input[position]))) |
- linePositionBuilder.append(input[position++]); |
- if (position < input.length() && !VTTParser::isValidSettingDelimiter(input[position])) |
- break; |
- |
- // 2. If value does not contain at least one character in the range U+0030 DIGIT ZERO (0) to U+0039 DIGIT |
- // NINE (9), then jump to the step labeled next setting. |
- // 3. If any character in value other than the first character is a U+002D HYPHEN-MINUS character (-), then |
- // jump to the step labeled next setting. |
- // 4. If any character in value other than the last character is a U+0025 PERCENT SIGN character (%), then |
- // jump to the step labeled next setting. |
- String linePosition = linePositionBuilder.toString(); |
- if (linePosition.find('-', 1) != kNotFound || linePosition.reverseFind("%", linePosition.length() - 2) != kNotFound) |
- break; |
- |
- // 5. If the first character in value is a U+002D HYPHEN-MINUS character (-) and the last character in value is a |
- // U+0025 PERCENT SIGN character (%), then jump to the step labeled next setting. |
- if (linePosition[0] == '-' && linePosition[linePosition.length() - 1] == '%') |
- break; |
- |
- // 6. Ignoring the trailing percent sign, if any, interpret value as a (potentially signed) integer, and |
- // let number be that number. |
- // NOTE: toInt ignores trailing non-digit characters, such as '%'. |
- bool validNumber; |
- int number = linePosition.toInt(&validNumber); |
- if (!validNumber) |
- break; |
- |
- // 7. If the last character in value is a U+0025 PERCENT SIGN character (%), but number is not in the range |
- // 0 ≤ number ≤ 100, then jump to the step labeled next setting. |
- // 8. Let cue's text track cue line position be number. |
- // 9. If the last character in value is a U+0025 PERCENT SIGN character (%), then let cue's text track cue |
- // snap-to-lines flag be false. Otherwise, let it be true. |
- if (linePosition[linePosition.length() - 1] == '%') { |
- if (number < 0 || number > 100) |
- break; |
- |
- // 10 - If '%' then set snap-to-lines flag to false. |
- m_snapToLines = false; |
- } |
- |
- m_linePosition = number; |
- } |
- break; |
- case Position: |
- { |
- // 1. If value contains any characters other than U+0025 PERCENT SIGN characters (%) and characters in the range |
- // U+0030 DIGIT ZERO (0) to U+0039 DIGIT NINE (9), then jump to the step labeled next setting. |
- // 2. If value does not contain at least one character in the range U+0030 DIGIT ZERO (0) to U+0039 DIGIT NINE (9), |
- // then jump to the step labeled next setting. |
- String textPosition = VTTParser::collectDigits(input, &position); |
- if (textPosition.isEmpty()) |
- break; |
- if (position >= input.length()) |
- break; |
- |
- // 3. If any character in value other than the last character is a U+0025 PERCENT SIGN character (%), then jump |
- // to the step labeled next setting. |
- // 4. If the last character in value is not a U+0025 PERCENT SIGN character (%), then jump to the step labeled |
- // next setting. |
- if (input[position++] != '%') |
- break; |
- if (position < input.length() && !VTTParser::isValidSettingDelimiter(input[position])) |
- break; |
- |
- // 5. Ignoring the trailing percent sign, interpret value as an integer, and let number be that number. |
- // 6. If number is not in the range 0 ≤ number ≤ 100, then jump to the step labeled next setting. |
- // NOTE: toInt ignores trailing non-digit characters, such as '%'. |
- bool validNumber; |
- int number = textPosition.toInt(&validNumber); |
- if (!validNumber) |
- break; |
- if (number < 0 || number > 100) |
- break; |
- |
- // 7. Let cue's text track cue text position be number. |
- m_textPosition = number; |
- } |
- break; |
- case Size: |
- { |
- // 1. If value contains any characters other than U+0025 PERCENT SIGN characters (%) and characters in the |
- // range U+0030 DIGIT ZERO (0) to U+0039 DIGIT NINE (9), then jump to the step labeled next setting. |
- // 2. If value does not contain at least one character in the range U+0030 DIGIT ZERO (0) to U+0039 DIGIT |
- // NINE (9), then jump to the step labeled next setting. |
- String cueSize = VTTParser::collectDigits(input, &position); |
- if (cueSize.isEmpty()) |
- break; |
- if (position >= input.length()) |
- break; |
- |
- // 3. If any character in value other than the last character is a U+0025 PERCENT SIGN character (%), |
- // then jump to the step labeled next setting. |
- // 4. If the last character in value is not a U+0025 PERCENT SIGN character (%), then jump to the step |
- // labeled next setting. |
- if (input[position++] != '%') |
- break; |
- if (position < input.length() && !VTTParser::isValidSettingDelimiter(input[position])) |
- break; |
- |
- // 5. Ignoring the trailing percent sign, interpret value as an integer, and let number be that number. |
- // 6. If number is not in the range 0 ≤ number ≤ 100, then jump to the step labeled next setting. |
- bool validNumber; |
- int number = cueSize.toInt(&validNumber); |
- if (!validNumber) |
- break; |
- if (number < 0 || number > 100) |
- break; |
- |
- // 7. Let cue's text track cue size be number. |
- m_cueSize = number; |
- } |
- break; |
- case Align: |
- { |
- String cueAlignment = VTTParser::collectWord(input, &position); |
- |
- // 1. If value is a case-sensitive match for the string "start", then let cue's text track cue alignment be start alignment. |
- if (cueAlignment == startKeyword()) |
- m_cueAlignment = Start; |
- |
- // 2. If value is a case-sensitive match for the string "middle", then let cue's text track cue alignment be middle alignment. |
- else if (cueAlignment == middleKeyword()) |
- m_cueAlignment = Middle; |
- |
- // 3. If value is a case-sensitive match for the string "end", then let cue's text track cue alignment be end alignment. |
- else if (cueAlignment == endKeyword()) |
- m_cueAlignment = End; |
- |
- // 4. If value is a case-sensitive match for the string "left", then let cue's text track cue alignment be left alignment. |
- else if (cueAlignment == leftKeyword()) |
- m_cueAlignment = Left; |
- |
- // 5. If value is a case-sensitive match for the string "right", then let cue's text track cue alignment be right alignment. |
- else if (cueAlignment == rightKeyword()) |
- m_cueAlignment = Right; |
- } |
- break; |
- case RegionId: |
- m_regionId = VTTParser::collectWord(input, &position); |
- break; |
- case None: |
- break; |
- } |
- |
-NextSetting: |
- position = endOfSetting; |
- } |
- |
- // If cue's line position is not auto or cue's size is not 100 or cue's |
- // writing direction is not horizontal, but cue's region identifier is not |
- // the empty string, let cue's region identifier be the empty string. |
- if (m_regionId.isEmpty()) |
- return; |
- |
- if (m_linePosition != undefinedPosition || m_cueSize != 100 || m_writingDirection != Horizontal) |
- m_regionId = emptyString(); |
-} |
- |
-CSSValueID TextTrackCue::getCSSAlignment() const |
-{ |
- return displayAlignmentMap[m_cueAlignment]; |
-} |
- |
-CSSValueID TextTrackCue::getCSSWritingDirection() const |
-{ |
- return m_displayDirection; |
-} |
- |
-CSSValueID TextTrackCue::getCSSWritingMode() const |
-{ |
- return displayWritingModeMap[m_writingDirection]; |
-} |
- |
-int TextTrackCue::getCSSSize() const |
-{ |
- return m_displaySize; |
-} |
- |
-std::pair<double, double> TextTrackCue::getCSSPosition() const |
-{ |
- if (!m_snapToLines) |
- return getPositionCoordinates(); |
- |
- return m_displayPosition; |
-} |
- |
const AtomicString& TextTrackCue::interfaceName() const |
{ |
return EventTargetNames::TextTrackCue; |
} |
-ExecutionContext* TextTrackCue::executionContext() const |
-{ |
- ASSERT(m_cueBackgroundBox); |
- return m_cueBackgroundBox->executionContext(); |
-} |
- |
-Document& TextTrackCue::document() const |
-{ |
- ASSERT(m_cueBackgroundBox); |
- return m_cueBackgroundBox->document(); |
-} |
- |
} // namespace WebCore |