root/Source/core/rendering/RenderReplaced.cpp

DEFINITIONS

1. m_intrinsicSize
2. m_intrinsicSize
3. willBeDestroyed
4. styleDidChange
5. layout
6. intrinsicSizeChanged
7. paint
8. shouldPaint
9. firstContainingBlockWithLogicalWidth
10. hasReplacedLogicalWidth
11. hasReplacedLogicalHeight
12. needsPreferredWidthsRecalculation
13. rendererHasAspectRatio
14. computeAspectRatioInformationForRenderBox
15. replacedContentRect
16. computeIntrinsicRatioInformation
17. computeReplacedLogicalWidth
18. computeReplacedLogicalHeight
19. computeIntrinsicLogicalWidths
20. computePreferredLogicalWidths
21. positionForPoint
22. selectionRectForRepaint
23. localSelectionRect
24. setSelectionState
25. isSelected
26. clippedOverflowRectForRepaint

/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 * Copyright (C) 2000 Dirk Mueller (mueller@kde.org)
 * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
 * Copyright (C) Research In Motion Limited 2011-2012. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#include "config.h"
#include "core/rendering/RenderReplaced.h"

#include "RuntimeEnabledFeatures.h"
#include "core/rendering/GraphicsContextAnnotator.h"
#include "core/rendering/LayoutRectRecorder.h"
#include "core/rendering/LayoutRepainter.h"
#include "core/rendering/RenderBlock.h"
#include "core/rendering/RenderImage.h"
#include "core/rendering/RenderLayer.h"
#include "core/rendering/RenderView.h"
#include "platform/LengthFunctions.h"
#include "platform/graphics/GraphicsContext.h"

using namespace std;

namespace WebCore {

const int cDefaultWidth = 300;
const int cDefaultHeight = 150;

RenderReplaced::RenderReplaced(Element* element)
    : RenderBox(element)
    , m_intrinsicSize(cDefaultWidth, cDefaultHeight)
{
    setReplaced(true);
}

RenderReplaced::RenderReplaced(Element* element, const LayoutSize& intrinsicSize)
    : RenderBox(element)
    , m_intrinsicSize(intrinsicSize)
{
    setReplaced(true);
}

RenderReplaced::~RenderReplaced()
{
}

void RenderReplaced::willBeDestroyed()
{
    if (!documentBeingDestroyed() && parent())
        parent()->dirtyLinesFromChangedChild(this);

    RenderBox::willBeDestroyed();
}

void RenderReplaced::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
{
    RenderBox::styleDidChange(diff, oldStyle);

    bool hadStyle = (oldStyle != 0);
    float oldZoom = hadStyle ? oldStyle->effectiveZoom() : RenderStyle::initialZoom();
    if (style() && style()->effectiveZoom() != oldZoom)
        intrinsicSizeChanged();
}

void RenderReplaced::layout()
{
    ASSERT(needsLayout());

    LayoutRectRecorder recorder(*this);
    LayoutRepainter repainter(*this, checkForRepaintDuringLayout());

    setHeight(minimumReplacedHeight());

    updateLogicalWidth();
    updateLogicalHeight();

    m_overflow.clear();
    addVisualEffectOverflow();
    updateLayerTransform();
    invalidateBackgroundObscurationStatus();

    repainter.repaintAfterLayout();
    clearNeedsLayout();
}

void RenderReplaced::intrinsicSizeChanged()
{
    int scaledWidth = static_cast<int>(cDefaultWidth * style()->effectiveZoom());
    int scaledHeight = static_cast<int>(cDefaultHeight * style()->effectiveZoom());
    m_intrinsicSize = IntSize(scaledWidth, scaledHeight);
    setNeedsLayoutAndPrefWidthsRecalc();
}

void RenderReplaced::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
    ANNOTATE_GRAPHICS_CONTEXT(paintInfo, this);

    if (!shouldPaint(paintInfo, paintOffset))
        return;

    LayoutPoint adjustedPaintOffset = paintOffset + location();

    if (hasBoxDecorations() && (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection))
        paintBoxDecorations(paintInfo, adjustedPaintOffset);

    if (paintInfo.phase == PaintPhaseMask) {
        paintMask(paintInfo, adjustedPaintOffset);
        return;
    }

    if (paintInfo.phase == PaintPhaseClippingMask && (!hasLayer() || !layer()->hasCompositedClippingMask()))
        return;

    LayoutRect paintRect = LayoutRect(adjustedPaintOffset, size());
    if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth())
        paintOutline(paintInfo, paintRect);

    if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection && !canHaveChildren() && paintInfo.phase != PaintPhaseClippingMask)
        return;

    if (!paintInfo.shouldPaintWithinRoot(this))
        return;

    bool drawSelectionTint = selectionState() != SelectionNone && !document().printing();
    if (paintInfo.phase == PaintPhaseSelection) {
        if (selectionState() == SelectionNone)
            return;
        drawSelectionTint = false;
    }

    bool completelyClippedOut = false;
    if (style()->hasBorderRadius()) {
        LayoutRect borderRect = LayoutRect(adjustedPaintOffset, size());

        if (borderRect.isEmpty())
            completelyClippedOut = true;
        else {
            // Push a clip if we have a border radius, since we want to round the foreground content that gets painted.
            paintInfo.context->save();
            RoundedRect roundedInnerRect = style()->getRoundedInnerBorderFor(paintRect,
                paddingTop() + borderTop(), paddingBottom() + borderBottom(), paddingLeft() + borderLeft(), paddingRight() + borderRight(), true, true);
            clipRoundedInnerRect(paintInfo.context, paintRect, roundedInnerRect);
        }
    }

    if (!completelyClippedOut) {
        if (paintInfo.phase == PaintPhaseClippingMask) {
            paintClippingMask(paintInfo, adjustedPaintOffset);
        } else {
            paintReplaced(paintInfo, adjustedPaintOffset);
        }

        if (style()->hasBorderRadius())
            paintInfo.context->restore();
    }

    // The selection tint never gets clipped by border-radius rounding, since we want it to run right up to the edges of
    // surrounding content.
    if (drawSelectionTint) {
        LayoutRect selectionPaintingRect = localSelectionRect();
        selectionPaintingRect.moveBy(adjustedPaintOffset);
        paintInfo.context->fillRect(pixelSnappedIntRect(selectionPaintingRect), selectionBackgroundColor());
    }
}

bool RenderReplaced::shouldPaint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
    if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseOutline && paintInfo.phase != PaintPhaseSelfOutline
        && paintInfo.phase != PaintPhaseSelection && paintInfo.phase != PaintPhaseMask && paintInfo.phase != PaintPhaseClippingMask)
        return false;

    if (!paintInfo.shouldPaintWithinRoot(this))
        return false;

    // if we're invisible or haven't received a layout yet, then just bail.
    if (style()->visibility() != VISIBLE)
        return false;

    LayoutPoint adjustedPaintOffset = paintOffset + location();

    // Early exit if the element touches the edges.
    LayoutUnit top = adjustedPaintOffset.y() + visualOverflowRect().y();
    LayoutUnit bottom = adjustedPaintOffset.y() + visualOverflowRect().maxY();
    if (isSelected() && inlineBoxWrapper()) {
        LayoutUnit selTop = paintOffset.y() + inlineBoxWrapper()->root().selectionTop();
        LayoutUnit selBottom = paintOffset.y() + selTop + inlineBoxWrapper()->root().selectionHeight();
        top = min(selTop, top);
        bottom = max(selBottom, bottom);
    }

    if (adjustedPaintOffset.x() + visualOverflowRect().x() >= paintInfo.rect.maxX() || adjustedPaintOffset.x() + visualOverflowRect().maxX() <= paintInfo.rect.x())
        return false;

    if (top >= paintInfo.rect.maxY() || bottom <= paintInfo.rect.y())
        return false;

    return true;
}

static inline RenderBlock* firstContainingBlockWithLogicalWidth(const RenderReplaced* replaced)
{
    // We have to lookup the containing block, which has an explicit width, which must not be equal to our direct containing block.
    // If the embedded document appears _after_ we performed the initial layout, our intrinsic size is 300x150. If our containing
    // block doesn't provide an explicit width, it's set to the 300 default, coming from the initial layout run.
    RenderBlock* containingBlock = replaced->containingBlock();
    if (!containingBlock)
        return 0;

    for (; !containingBlock->isRenderView() && !containingBlock->isBody(); containingBlock = containingBlock->containingBlock()) {
        if (containingBlock->style()->logicalWidth().isSpecified()
            && containingBlock->style()->logicalMinWidth().isSpecified()
            && (containingBlock->style()->logicalMaxWidth().isSpecified() || containingBlock->style()->logicalMaxWidth().isUndefined()))
            return containingBlock;
    }

    return 0;
}

bool RenderReplaced::hasReplacedLogicalWidth() const
{
    if (style()->logicalWidth().isSpecified())
        return true;

    if (style()->logicalWidth().isAuto())
        return false;

    return firstContainingBlockWithLogicalWidth(this);
}

bool RenderReplaced::hasReplacedLogicalHeight() const
{
    if (style()->logicalHeight().isAuto())
        return false;

    if (style()->logicalHeight().isSpecified()) {
        if (hasAutoHeightOrContainingBlockWithAutoHeight())
            return false;
        return true;
    }

    if (style()->logicalHeight().isIntrinsic())
        return true;

    return false;
}

bool RenderReplaced::needsPreferredWidthsRecalculation() const
{
    // If the height is a percentage and the width is auto, then the containingBlocks's height changing can cause
    // this node to change it's preferred width because it maintains aspect ratio.
    return hasRelativeLogicalHeight() && style()->logicalWidth().isAuto() && !hasAutoHeightOrContainingBlockWithAutoHeight();
}

static inline bool rendererHasAspectRatio(const RenderObject* renderer)
{
    ASSERT(renderer);
    return renderer->isImage() || renderer->isCanvas() || renderer->isVideo();
}

void RenderReplaced::computeAspectRatioInformationForRenderBox(RenderBox* contentRenderer, FloatSize& constrainedSize, double& intrinsicRatio, bool& isPercentageIntrinsicSize) const
{
    FloatSize intrinsicSize;
    if (contentRenderer) {
        contentRenderer->computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio, isPercentageIntrinsicSize);
        if (intrinsicRatio)
            ASSERT(!isPercentageIntrinsicSize);

        // Handle zoom & vertical writing modes here, as the embedded document doesn't know about them.
        if (!isPercentageIntrinsicSize) {
            intrinsicSize.scale(style()->effectiveZoom());
            if (isRenderImage())
                intrinsicSize.scale(toRenderImage(this)->imageDevicePixelRatio());
        }

        if (rendererHasAspectRatio(this) && isPercentageIntrinsicSize)
            intrinsicRatio = 1;

        // Update our intrinsic size to match what the content renderer has computed, so that when we
        // constrain the size below, the correct intrinsic size will be obtained for comparison against
        // min and max widths.
        if (intrinsicRatio && !isPercentageIntrinsicSize && !intrinsicSize.isEmpty())
            m_intrinsicSize = LayoutSize(intrinsicSize);

        if (!isHorizontalWritingMode()) {
            if (intrinsicRatio)
                intrinsicRatio = 1 / intrinsicRatio;
            intrinsicSize = intrinsicSize.transposedSize();
        }
    } else {
        computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio, isPercentageIntrinsicSize);
        if (intrinsicRatio) {
            ASSERT(!isPercentageIntrinsicSize);
            if (!intrinsicSize.isEmpty())
                m_intrinsicSize = LayoutSize(isHorizontalWritingMode() ? intrinsicSize : intrinsicSize.transposedSize());
        }
    }

    // Now constrain the intrinsic size along each axis according to minimum and maximum width/heights along the
    // opposite axis. So for example a maximum width that shrinks our width will result in the height we compute here
    // having to shrink in order to preserve the aspect ratio. Because we compute these values independently along
    // each axis, the final returned size may in fact not preserve the aspect ratio.
    // FIXME: In the long term, it might be better to just return this code more to the way it used to be before this
    // function was added, since all it has done is make the code more unclear.
    constrainedSize = intrinsicSize;
    if (intrinsicRatio && !isPercentageIntrinsicSize && !intrinsicSize.isEmpty() && style()->logicalWidth().isAuto() && style()->logicalHeight().isAuto()) {
        // We can't multiply or divide by 'intrinsicRatio' here, it breaks tests, like fast/images/zoomed-img-size.html, which
        // can only be fixed once subpixel precision is available for things like intrinsicWidth/Height - which include zoom!
        constrainedSize.setWidth(RenderBox::computeReplacedLogicalHeight() * intrinsicSize.width() / intrinsicSize.height());
        constrainedSize.setHeight(RenderBox::computeReplacedLogicalWidth() * intrinsicSize.height() / intrinsicSize.width());
    }
}

LayoutRect RenderReplaced::replacedContentRect(const LayoutSize* overriddenIntrinsicSize) const
{
    LayoutRect contentRect = contentBoxRect();
    ObjectFit objectFit = style()->objectFit();

    if (objectFit == ObjectFitFill && style()->objectPosition() == RenderStyle::initialObjectPosition()) {
        if (!isVideo() || RuntimeEnabledFeatures::objectFitPositionEnabled())
            return contentRect;
        objectFit = ObjectFitContain;
    }

    LayoutSize intrinsicSize = overriddenIntrinsicSize ? *overriddenIntrinsicSize : this->intrinsicSize();
    if (!intrinsicSize.width() || !intrinsicSize.height())
        return contentRect;

    LayoutRect finalRect = contentRect;
    switch (objectFit) {
    case ObjectFitContain:
    case ObjectFitScaleDown:
    case ObjectFitCover:
        finalRect.setSize(finalRect.size().fitToAspectRatio(intrinsicSize, objectFit == ObjectFitCover ? AspectRatioFitGrow : AspectRatioFitShrink));
        if (objectFit != ObjectFitScaleDown || finalRect.width() <= intrinsicSize.width())
            break;
        // fall through
    case ObjectFitNone:
        finalRect.setSize(intrinsicSize);
        break;
    case ObjectFitFill:
        break;
    default:
        ASSERT_NOT_REACHED();
    }

    LayoutUnit xOffset = minimumValueForLength(style()->objectPosition().x(), contentRect.width() - finalRect.width());
    LayoutUnit yOffset = minimumValueForLength(style()->objectPosition().y(), contentRect.height() - finalRect.height());
    finalRect.move(xOffset, yOffset);

    return finalRect;
}

void RenderReplaced::computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio, bool& isPercentageIntrinsicSize) const
{
    // If there's an embeddedContentBox() of a remote, referenced document available, this code-path should never be used.
    ASSERT(!embeddedContentBox());
    isPercentageIntrinsicSize = false;
    intrinsicSize = FloatSize(intrinsicLogicalWidth().toFloat(), intrinsicLogicalHeight().toFloat());

    // Figure out if we need to compute an intrinsic ratio.
    if (intrinsicSize.isEmpty() || !rendererHasAspectRatio(this))
        return;

    intrinsicRatio = intrinsicSize.width() / intrinsicSize.height();
}

LayoutUnit RenderReplaced::computeReplacedLogicalWidth(ShouldComputePreferred shouldComputePreferred) const
{
    if (style()->logicalWidth().isSpecified() || style()->logicalWidth().isIntrinsic())
        return computeReplacedLogicalWidthRespectingMinMaxWidth(computeReplacedLogicalWidthUsing(style()->logicalWidth()), shouldComputePreferred);

    RenderBox* contentRenderer = embeddedContentBox();

    // 10.3.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-width
    bool isPercentageIntrinsicSize = false;
    double intrinsicRatio = 0;
    FloatSize constrainedSize;
    computeAspectRatioInformationForRenderBox(contentRenderer, constrainedSize, intrinsicRatio, isPercentageIntrinsicSize);

    if (style()->logicalWidth().isAuto()) {
        bool heightIsAuto = style()->logicalHeight().isAuto();
        bool hasIntrinsicWidth = !isPercentageIntrinsicSize && constrainedSize.width() > 0;

        // If 'height' and 'width' both have computed values of 'auto' and the element also has an intrinsic width, then that intrinsic width is the used value of 'width'.
        if (heightIsAuto && hasIntrinsicWidth)
            return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred);

        bool hasIntrinsicHeight = !isPercentageIntrinsicSize && constrainedSize.height() > 0;
        if (intrinsicRatio || isPercentageIntrinsicSize) {
            // If 'height' and 'width' both have computed values of 'auto' and the element has no intrinsic width, but does have an intrinsic height and intrinsic ratio;
            // or if 'width' has a computed value of 'auto', 'height' has some other computed value, and the element does have an intrinsic ratio; then the used value
            // of 'width' is: (used height) * (intrinsic ratio)
            if (intrinsicRatio && ((heightIsAuto && !hasIntrinsicWidth && hasIntrinsicHeight) || !heightIsAuto)) {
                LayoutUnit logicalHeight = computeReplacedLogicalHeight();
                return computeReplacedLogicalWidthRespectingMinMaxWidth(roundToInt(round(logicalHeight * intrinsicRatio)), shouldComputePreferred);
            }

            // If 'height' and 'width' both have computed values of 'auto' and the element has an intrinsic ratio but no intrinsic height or width, then the used value of
            // 'width' is undefined in CSS 2.1. However, it is suggested that, if the containing block's width does not itself depend on the replaced element's width, then
            // the used value of 'width' is calculated from the constraint equation used for block-level, non-replaced elements in normal flow.
            if (heightIsAuto && !hasIntrinsicWidth && !hasIntrinsicHeight) {
                // The aforementioned 'constraint equation' used for block-level, non-replaced elements in normal flow:
                // 'margin-left' + 'border-left-width' + 'padding-left' + 'width' + 'padding-right' + 'border-right-width' + 'margin-right' = width of containing block
                LayoutUnit logicalWidth;
                // FIXME: This walking up the containgBlock chain to find the first one with a specified width is bonkers.
                // If nothing else, it requires making sure that computeReplacedLogicalWidthRespectingMinMaxWidth cannot
                // depend on the width of the replaced element or we infinite loop. Right now we do that in
                // firstContainingBlockWithLogicalWidth by checking that width/min-width/max-width are all specified.
                //
                // Firefox 27 seems to only do this if the <svg> has a viewbox.
                if (RenderBlock* blockWithWidth = firstContainingBlockWithLogicalWidth(this)) {
                    logicalWidth = blockWithWidth->computeReplacedLogicalWidthRespectingMinMaxWidth(blockWithWidth->computeReplacedLogicalWidthUsing(blockWithWidth->style()->logicalWidth()), shouldComputePreferred);
                } else {
                    // FIXME: If shouldComputePreferred == ComputePreferred, then we're reading this during preferred width
                    // computation, at which point this is reading stale data from a previous layout.
                    logicalWidth = containingBlock()->availableLogicalWidth();
                }

                // This solves above equation for 'width' (== logicalWidth).
                LayoutUnit marginStart = minimumValueForLength(style()->marginStart(), logicalWidth);
                LayoutUnit marginEnd = minimumValueForLength(style()->marginEnd(), logicalWidth);
                logicalWidth = max<LayoutUnit>(0, logicalWidth - (marginStart + marginEnd + (width() - clientWidth())));
                if (isPercentageIntrinsicSize)
                    logicalWidth = logicalWidth * constrainedSize.width() / 100;
                return computeReplacedLogicalWidthRespectingMinMaxWidth(logicalWidth, shouldComputePreferred);
            }
        }

        // Otherwise, if 'width' has a computed value of 'auto', and the element has an intrinsic width, then that intrinsic width is the used value of 'width'.
        if (hasIntrinsicWidth)
            return computeReplacedLogicalWidthRespectingMinMaxWidth(constrainedSize.width(), shouldComputePreferred);

        // Otherwise, if 'width' has a computed value of 'auto', but none of the conditions above are met, then the used value of 'width' becomes 300px. If 300px is too
        // wide to fit the device, UAs should use the width of the largest rectangle that has a 2:1 ratio and fits the device instead.
        // Note: We fall through and instead return intrinsicLogicalWidth() here - to preserve existing WebKit behavior, which might or might not be correct, or desired.
        // Changing this to return cDefaultWidth, will affect lots of test results. Eg. some tests assume that a blank <img> tag (which implies width/height=auto)
        // has no intrinsic size, which is wrong per CSS 2.1, but matches our behavior since a long time.
    }

    return computeReplacedLogicalWidthRespectingMinMaxWidth(intrinsicLogicalWidth(), shouldComputePreferred);
}

LayoutUnit RenderReplaced::computeReplacedLogicalHeight() const
{
    // 10.5 Content height: the 'height' property: http://www.w3.org/TR/CSS21/visudet.html#propdef-height
    if (hasReplacedLogicalHeight())
        return computeReplacedLogicalHeightRespectingMinMaxHeight(computeReplacedLogicalHeightUsing(style()->logicalHeight()));

    RenderBox* contentRenderer = embeddedContentBox();

    // 10.6.2 Inline, replaced elements: http://www.w3.org/TR/CSS21/visudet.html#inline-replaced-height
    bool isPercentageIntrinsicSize = false;
    double intrinsicRatio = 0;
    FloatSize constrainedSize;
    computeAspectRatioInformationForRenderBox(contentRenderer, constrainedSize, intrinsicRatio, isPercentageIntrinsicSize);

    bool widthIsAuto = style()->logicalWidth().isAuto();
    bool hasIntrinsicHeight = !isPercentageIntrinsicSize && constrainedSize.height() > 0;

    // If 'height' and 'width' both have computed values of 'auto' and the element also has an intrinsic height, then that intrinsic height is the used value of 'height'.
    if (widthIsAuto && hasIntrinsicHeight)
        return computeReplacedLogicalHeightRespectingMinMaxHeight(constrainedSize.height());

    // Otherwise, if 'height' has a computed value of 'auto', and the element has an intrinsic ratio then the used value of 'height' is:
    // (used width) / (intrinsic ratio)
    if (intrinsicRatio)
        return computeReplacedLogicalHeightRespectingMinMaxHeight(roundToInt(round(availableLogicalWidth() / intrinsicRatio)));

    // Otherwise, if 'height' has a computed value of 'auto', and the element has an intrinsic height, then that intrinsic height is the used value of 'height'.
    if (hasIntrinsicHeight)
        return computeReplacedLogicalHeightRespectingMinMaxHeight(constrainedSize.height());

    // Otherwise, if 'height' has a computed value of 'auto', but none of the conditions above are met, then the used value of 'height' must be set to the height
    // of the largest rectangle that has a 2:1 ratio, has a height not greater than 150px, and has a width not greater than the device width.
    return computeReplacedLogicalHeightRespectingMinMaxHeight(intrinsicLogicalHeight());
}

void RenderReplaced::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
{
    minLogicalWidth = maxLogicalWidth = intrinsicLogicalWidth();
}

void RenderReplaced::computePreferredLogicalWidths()
{
    ASSERT(preferredLogicalWidthsDirty());

    // We cannot resolve any percent logical width here as the available logical
    // width may not be set on our containing block.
    if (style()->logicalWidth().isPercent())
        computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
    else
        m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = computeReplacedLogicalWidth(ComputePreferred);

    RenderStyle* styleToUse = style();
    if (styleToUse->logicalWidth().isPercent() || styleToUse->logicalMaxWidth().isPercent() || hasRelativeIntrinsicLogicalWidth())
        m_minPreferredLogicalWidth = 0;

    if (styleToUse->logicalMinWidth().isFixed() && styleToUse->logicalMinWidth().value() > 0) {
        m_maxPreferredLogicalWidth = max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMinWidth().value()));
        m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMinWidth().value()));
    }

    if (styleToUse->logicalMaxWidth().isFixed()) {
        m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMaxWidth().value()));
        m_minPreferredLogicalWidth = min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMaxWidth().value()));
    }

    LayoutUnit borderAndPadding = borderAndPaddingLogicalWidth();
    m_minPreferredLogicalWidth += borderAndPadding;
    m_maxPreferredLogicalWidth += borderAndPadding;

    clearPreferredLogicalWidthsDirty();
}

PositionWithAffinity RenderReplaced::positionForPoint(const LayoutPoint& point)
{
    // FIXME: This code is buggy if the replaced element is relative positioned.
    InlineBox* box = inlineBoxWrapper();
    RootInlineBox* rootBox = box ? &box->root() : 0;

    LayoutUnit top = rootBox ? rootBox->selectionTop() : logicalTop();
    LayoutUnit bottom = rootBox ? rootBox->selectionBottom() : logicalBottom();

    LayoutUnit blockDirectionPosition = isHorizontalWritingMode() ? point.y() + y() : point.x() + x();
    LayoutUnit lineDirectionPosition = isHorizontalWritingMode() ? point.x() + x() : point.y() + y();

    if (blockDirectionPosition < top)
        return createPositionWithAffinity(caretMinOffset(), DOWNSTREAM); // coordinates are above

    if (blockDirectionPosition >= bottom)
        return createPositionWithAffinity(caretMaxOffset(), DOWNSTREAM); // coordinates are below

    if (node()) {
        if (lineDirectionPosition <= logicalLeft() + (logicalWidth() / 2))
            return createPositionWithAffinity(0, DOWNSTREAM);
        return createPositionWithAffinity(1, DOWNSTREAM);
    }

    return RenderBox::positionForPoint(point);
}

LayoutRect RenderReplaced::selectionRectForRepaint(const RenderLayerModelObject* repaintContainer, bool clipToVisibleContent)
{
    ASSERT(!needsLayout());

    if (!isSelected())
        return LayoutRect();

    LayoutRect rect = localSelectionRect();
    if (clipToVisibleContent)
        computeRectForRepaint(repaintContainer, rect);
    else
        rect = localToContainerQuad(FloatRect(rect), repaintContainer).enclosingBoundingBox();

    return rect;
}

LayoutRect RenderReplaced::localSelectionRect(bool checkWhetherSelected) const
{
    if (checkWhetherSelected && !isSelected())
        return LayoutRect();

    if (!inlineBoxWrapper())
        // We're a block-level replaced element.  Just return our own dimensions.
        return LayoutRect(LayoutPoint(), size());

    RootInlineBox& root = inlineBoxWrapper()->root();
    LayoutUnit newLogicalTop = root.block().style()->isFlippedBlocksWritingMode() ? inlineBoxWrapper()->logicalBottom() - root.selectionBottom() : root.selectionTop() - inlineBoxWrapper()->logicalTop();
    if (root.block().style()->isHorizontalWritingMode())
        return LayoutRect(0, newLogicalTop, width(), root.selectionHeight());
    return LayoutRect(newLogicalTop, 0, root.selectionHeight(), height());
}

void RenderReplaced::setSelectionState(SelectionState state)
{
    // The selection state for our containing block hierarchy is updated by the base class call.
    RenderBox::setSelectionState(state);

    if (inlineBoxWrapper() && canUpdateSelectionOnRootLineBoxes())
        inlineBoxWrapper()->root().setHasSelectedChildren(isSelected());
}

bool RenderReplaced::isSelected() const
{
    SelectionState s = selectionState();
    if (s == SelectionNone)
        return false;
    if (s == SelectionInside)
        return true;

    int selectionStart, selectionEnd;
    selectionStartEnd(selectionStart, selectionEnd);
    if (s == SelectionStart)
        return selectionStart == 0;

    int end = node()->hasChildren() ? node()->countChildren() : 1;
    if (s == SelectionEnd)
        return selectionEnd == end;
    if (s == SelectionBoth)
        return selectionStart == 0 && selectionEnd == end;

    ASSERT(0);
    return false;
}

LayoutRect RenderReplaced::clippedOverflowRectForRepaint(const RenderLayerModelObject* repaintContainer) const
{
    if (style()->visibility() != VISIBLE && !enclosingLayer()->hasVisibleContent())
        return LayoutRect();

    // The selectionRect can project outside of the overflowRect, so take their union
    // for repainting to avoid selection painting glitches.
    LayoutRect r = unionRect(localSelectionRect(false), visualOverflowRect());

    RenderView* v = view();
    if (!RuntimeEnabledFeatures::repaintAfterLayoutEnabled() && v) {
        // FIXME: layoutDelta needs to be applied in parts before/after transforms and
        // repaint containers. https://bugs.webkit.org/show_bug.cgi?id=23308
        r.move(v->layoutDelta());
    }

    computeRectForRepaint(repaintContainer, r);
    return r;
}

}