Move VTT functionality from TextTrackCue.* to VTTCue.*

Source/core/rendering/RenderTextTrackCue.cpp

Index: Source/core/rendering/RenderTextTrackCue.cpp
diff --git a/Source/core/rendering/RenderTextTrackCue.cpp b/Source/core/rendering/RenderTextTrackCue.cpp
deleted file mode 100644
index 027ed33fd2205e1f8a1e86d8f821eaae1978c62e..0000000000000000000000000000000000000000
--- a/Source/core/rendering/RenderTextTrackCue.cpp
+++ /dev/null
@@ -1,270 +0,0 @@
-/*
- * Copyright (C) 2012 Victor Carbune (victor@rosedu.org)
- *
- * 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/rendering/RenderTextTrackCue.h"
-
-#include "core/html/track/TextTrackCue.h"
-#include "core/rendering/LayoutRectRecorder.h"
-#include "core/rendering/RenderView.h"
-
-namespace WebCore {
-
-RenderTextTrackCue::RenderTextTrackCue(TextTrackCueBox* element)
-    : RenderBlockFlow(element)
-    , m_cue(element->getCue())
-{
-}
-
-void RenderTextTrackCue::layout()
-{
-    LayoutRectRecorder recorder(*this);
-    RenderBlockFlow::layout();
-
-    // If WebVTT Regions are used, the regular WebVTT layout algorithm is no
-    // longer necessary, since cues having the region parameter set do not have
-    // any positioning parameters. Also, in this case, the regions themselves
-    // have positioning information.
-    if (!m_cue->regionId().isEmpty())
-        return;
-
-    LayoutStateMaintainer statePusher(view(), this, locationOffset(), hasTransform() || hasReflection() || style()->isFlippedBlocksWritingMode());
-
-    if (m_cue->snapToLines())
-        repositionCueSnapToLinesSet();
-    else
-        repositionCueSnapToLinesNotSet();
-
-    statePusher.pop();
-}
-
-bool RenderTextTrackCue::findFirstLineBox(InlineFlowBox*& firstLineBox)
-{
-    if (firstChild()->isRenderInline())
-        firstLineBox = toRenderInline(firstChild())->firstLineBox();
-    else
-        return false;
-
-    return true;
-}
-
-bool RenderTextTrackCue::initializeLayoutParameters(InlineFlowBox* firstLineBox, LayoutUnit& step, LayoutUnit& position)
-{
-    ASSERT(firstChild());
-
-    RenderBlock* parentBlock = containingBlock();
-
-    // 1. Horizontal: Let step be the height of the first line box in boxes.
-    //    Vertical: Let step be the width of the first line box in boxes.
-    step = m_cue->getWritingDirection() == TextTrackCue::Horizontal ? firstLineBox->height() : firstLineBox->width();
-
-    // 2. If step is zero, then jump to the step labeled done positioning below.
-    if (!step)
-        return false;
-
-    // 3. Let line position be the text track cue computed line position.
-    int linePosition = m_cue->calculateComputedLinePosition();
-
-    // 4. Vertical Growing Left: Add one to line position then negate it.
-    if (m_cue->getWritingDirection() == TextTrackCue::VerticalGrowingLeft)
-        linePosition = -(linePosition + 1);
-
-    // 5. Let position be the result of multiplying step and line position.
-    position = step * linePosition;
-
-    // 6. Vertical Growing Left: Decrease position by the width of the
-    // bounding box of the boxes in boxes, then increase position by step.
-    if (m_cue->getWritingDirection() == TextTrackCue::VerticalGrowingLeft) {
-        position -= width();
-        position += step;
-    }
-
-    // 7. If line position is less than zero...
-    if (linePosition < 0) {
-        // Horizontal / Vertical: ... then increase position by the
-        // height / width of the video's rendering area ...
-        position += m_cue->getWritingDirection() == TextTrackCue::Horizontal ? parentBlock->height() : parentBlock->width();
-
-        // ... and negate step.
-        step = -step;
-    }
-
-    return true;
-}
-
-void RenderTextTrackCue::placeBoxInDefaultPosition(LayoutUnit position, bool& switched)
-{
-    // 8. Move all boxes in boxes ...
-    if (m_cue->getWritingDirection() == TextTrackCue::Horizontal)
-        // Horizontal: ... down by the distance given by position
-        setY(y() + position);
-    else
-        // Vertical: ... right by the distance given by position
-        setX(x() + position);
-
-    // 9. Default: Remember the position of all the boxes in boxes as their
-    // default position.
-    m_fallbackPosition = FloatPoint(x(), y());
-
-    // 10. Let switched be false.
-    switched = false;
-}
-
-bool RenderTextTrackCue::isOutside() const
-{
-    return !containingBlock()->absoluteBoundingBoxRect().contains(absoluteContentBox());
-}
-
-bool RenderTextTrackCue::isOverlapping() const
-{
-    for (RenderObject* box = previousSibling(); box; box = box->previousSibling()) {
-        IntRect boxRect = box->absoluteBoundingBoxRect();
-
-        if (absoluteBoundingBoxRect().intersects(boxRect))
-            return true;
-    }
-
-    return false;
-}
-
-bool RenderTextTrackCue::shouldSwitchDirection(InlineFlowBox* firstLineBox, LayoutUnit step) const
-{
-    LayoutUnit top = y();
-    LayoutUnit left = x();
-    LayoutUnit bottom = top + firstLineBox->height();
-    LayoutUnit right = left + firstLineBox->width();
-
-    // 12. Horizontal: If step is negative and the top of the first line
-    // box in boxes is now above the top of the video's rendering area,
-    // or if step is positive and the bottom of the first line box in
-    // boxes is now below the bottom of the video's rendering area, jump
-    // to the step labeled switch direction.
-    LayoutUnit parentHeight = containingBlock()->height();
-    if (m_cue->getWritingDirection() == TextTrackCue::Horizontal && ((step < 0 && top < 0) || (step > 0 && bottom > parentHeight)))
-        return true;
-
-    // 12. Vertical: If step is negative and the left edge of the first line
-    // box in boxes is now to the left of the left edge of the video's
-    // rendering area, or if step is positive and the right edge of the
-    // first line box in boxes is now to the right of the right edge of
-    // the video's rendering area, jump to the step labeled switch direction.
-    LayoutUnit parentWidth = containingBlock()->width();
-    if (m_cue->getWritingDirection() != TextTrackCue::Horizontal && ((step < 0 && left < 0) || (step > 0 && right > parentWidth)))
-        return true;
-
-    return false;
-}
-
-void RenderTextTrackCue::moveBoxesByStep(LayoutUnit step)
-{
-    // 13. Horizontal: Move all the boxes in boxes down by the distance
-    // given by step. (If step is negative, then this will actually
-    // result in an upwards movement of the boxes in absolute terms.)
-    if (m_cue->getWritingDirection() == TextTrackCue::Horizontal)
-        setY(y() + step);
-
-    // 13. Vertical: Move all the boxes in boxes right by the distance
-    // given by step. (If step is negative, then this will actually
-    // result in a leftwards movement of the boxes in absolute terms.)
-    else
-        setX(x() + step);
-}
-
-bool RenderTextTrackCue::switchDirection(bool& switched, LayoutUnit& step)
-{
-    // 15. Switch direction: Move all the boxes in boxes back to their
-    // default position as determined in the step above labeled default.
-    setX(m_fallbackPosition.x());
-    setY(m_fallbackPosition.y());
-
-    // 16. If switched is true, jump to the step labeled done
-    // positioning below.
-    if (switched)
-        return false;
-
-    // 17. Negate step.
-    step = -step;
-
-    // 18. Set switched to true.
-    switched = true;
-    return true;
-}
-
-void RenderTextTrackCue::repositionCueSnapToLinesSet()
-{
-    InlineFlowBox* firstLineBox;
-    LayoutUnit step;
-    LayoutUnit position;
-
-    if (!findFirstLineBox(firstLineBox))
-        return;
-
-    if (!initializeLayoutParameters(firstLineBox, step, position))
-        return;
-
-    bool switched;
-    placeBoxInDefaultPosition(position, switched);
-
-    // 11. Step loop: If none of the boxes in boxes would overlap any of the boxes
-    // in output and all the boxes in output are within the video's rendering area
-    // then jump to the step labeled done positioning.
-    while (isOutside() || isOverlapping()) {
-        if (!shouldSwitchDirection(firstLineBox, step))
-            // 13. Move all the boxes in boxes ...
-            // 14. Jump back to the step labeled step loop.
-            moveBoxesByStep(step);
-        else if (!switchDirection(switched, step))
-            break;
-
-        // 19. Jump back to the step labeled step loop.
-    }
-
-    // Acommodate extra top and bottom padding, border or margin.
-    // Note: this is supported only for internal UA styling, not through the cue selector.
-    if (hasInlineDirectionBordersPaddingOrMargin()) {
-        IntRect containerRect = containingBlock()->absoluteBoundingBoxRect();
-        IntRect cueRect = absoluteBoundingBoxRect();
-
-        int topOverflow = cueRect.y() - containerRect.y();
-        int bottomOverflow = containerRect.y() + containerRect.height() - cueRect.y() - cueRect.height();
-
-        int adjustment = 0;
-        if (topOverflow < 0)
-            adjustment = -topOverflow;
-        else if (bottomOverflow < 0)
-            adjustment = bottomOverflow;
-
-        if (adjustment)
-            setY(y() + adjustment);
-    }
-}
-
-void RenderTextTrackCue::repositionCueSnapToLinesNotSet()
-{
-    // FIXME: Implement overlapping detection when snap-to-lines is not set. http://wkb.ug/84296
-}
-
-} // namespace WebCore
-