blob: b44abe2d1b1d01508ab34c47a8fbe6f0537f5d23 [file] [log] [blame]
/*
* 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.
*
* 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 "RenderReplaced.h"
#include "Frame.h"
#include "GraphicsContext.h"
#include "LayoutRepainter.h"
#include "Page.h"
#include "RenderBlock.h"
#include "RenderLayer.h"
#include "RenderTheme.h"
#include "RenderView.h"
#include "VisiblePosition.h"
using namespace std;
namespace WebCore {
const int cDefaultWidth = 300;
const int cDefaultHeight = 150;
RenderReplaced::RenderReplaced(Node* node)
: RenderBox(node)
, m_intrinsicSize(cDefaultWidth, cDefaultHeight)
, m_hasIntrinsicSize(false)
{
setReplaced(true);
}
RenderReplaced::RenderReplaced(Node* node, const IntSize& intrinsicSize)
: RenderBox(node)
, m_intrinsicSize(intrinsicSize)
, m_hasIntrinsicSize(true)
{
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());
LayoutRepainter repainter(*this, checkForRepaintDuringLayout());
setHeight(minimumReplacedHeight());
computeLogicalWidth();
computeLogicalHeight();
m_overflow.clear();
addVisualEffectOverflow();
updateLayerTransform();
repainter.repaintAfterLayout();
setNeedsLayout(false);
}
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)
{
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;
}
LayoutRect paintRect = LayoutRect(adjustedPaintOffset, size());
if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth())
paintOutline(paintInfo.context, paintRect);
if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection && !canHaveChildren())
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();
paintInfo.context->addRoundedRectClip(style()->getRoundedBorderFor(paintRect));
}
}
if (!completelyClippedOut) {
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(selectionPaintingRect, selectionBackgroundColor(), style()->colorSpace());
}
}
bool RenderReplaced::shouldPaint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseOutline && paintInfo.phase != PaintPhaseSelfOutline
&& paintInfo.phase != PaintPhaseSelection && paintInfo.phase != PaintPhaseMask)
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() + minYVisualOverflow();
LayoutUnit bottom = adjustedPaintOffset.y() + maxYVisualOverflow();
if (isSelected() && m_inlineBoxWrapper) {
LayoutUnit selTop = paintOffset.y() + m_inlineBoxWrapper->root()->selectionTop();
LayoutUnit selBottom = paintOffset.y() + selTop + m_inlineBoxWrapper->root()->selectionHeight();
top = min(selTop, top);
bottom = max(selBottom, bottom);
}
LayoutRect localRepaintRect = paintInfo.rect;
localRepaintRect.inflate(maximalOutlineSize(paintInfo.phase));
if (adjustedPaintOffset.x() + minXVisualOverflow() >= localRepaintRect.maxX() || adjustedPaintOffset.x() + maxXVisualOverflow() <= localRepaintRect.x())
return false;
if (top >= localRepaintRect.maxY() || bottom <= localRepaintRect.y())
return false;
return true;
}
int RenderReplaced::computeIntrinsicLogicalWidth(RenderBox* contentRenderer, bool includeMaxWidth) const
{
if (m_hasIntrinsicSize)
return computeReplacedLogicalWidthRespectingMinMaxWidth(calcAspectRatioLogicalWidth(), includeMaxWidth);
ASSERT(contentRenderer);
ASSERT(contentRenderer->style());
return contentRenderer->computeReplacedLogicalWidthRespectingMinMaxWidth(contentRenderer->computeReplacedLogicalWidthUsing(contentRenderer->style()->logicalWidth()), includeMaxWidth);
}
int RenderReplaced::computeIntrinsicLogicalHeight(RenderBox* contentRenderer) const
{
if (m_hasIntrinsicSize)
return computeReplacedLogicalHeightRespectingMinMaxHeight(calcAspectRatioLogicalHeight());
ASSERT(contentRenderer);
ASSERT(contentRenderer->style());
return contentRenderer->computeReplacedLogicalHeightRespectingMinMaxHeight(contentRenderer->computeReplacedLogicalHeightUsing(contentRenderer->style()->logicalHeight()));
}
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())
return containingBlock;
}
return 0;
}
bool RenderReplaced::hasReplacedLogicalWidth() const
{
if (style()->logicalWidth().isSpecified())
return true;
if (style()->logicalWidth().isAuto())
return false;
return firstContainingBlockWithLogicalWidth(this);
}
static inline bool hasAutoHeightOrContainingBlockWithAutoHeight(const RenderReplaced* replaced)
{
Length logicalHeightLength = replaced->style()->logicalHeight();
if (logicalHeightLength.isAuto())
return true;
// For percentage heights: The percentage is calculated with respect to the height of the generated box's
// containing block. If the height of the containing block is not specified explicitly (i.e., it depends
// on content height), and this element is not absolutely positioned, the value computes to 'auto'.
if (!logicalHeightLength.isPercent() || replaced->isPositioned() || replaced->document()->inQuirksMode())
return false;
for (RenderBlock* cb = replaced->containingBlock(); !cb->isRenderView(); cb = cb->containingBlock()) {
if (cb->isTableCell() || (!cb->style()->logicalHeight().isAuto() || (!cb->style()->top().isAuto() && !cb->style()->bottom().isAuto())))
return false;
}
return true;
}
bool RenderReplaced::hasReplacedLogicalHeight() const
{
if (style()->logicalHeight().isAuto())
return false;
if (style()->logicalHeight().isSpecified()) {
if (hasAutoHeightOrContainingBlockWithAutoHeight(this))
return false;
return true;
}
return false;
}
LayoutUnit RenderReplaced::computeReplacedLogicalWidth(bool includeMaxWidth) const
{
if (style()->logicalWidth().isSpecified())
return computeReplacedLogicalWidthRespectingMinMaxWidth(computeReplacedLogicalWidthUsing(style()->logicalWidth()), includeMaxWidth);
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 intrinsicSize;
if (contentRenderer)
contentRenderer->computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio, isPercentageIntrinsicSize);
else
computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio, isPercentageIntrinsicSize);
if (intrinsicRatio && !isHorizontalWritingMode())
intrinsicRatio = 1 / intrinsicRatio;
if (style()->logicalWidth().isAuto()) {
bool heightIsAuto = style()->logicalHeight().isAuto();
bool hasIntrinsicWidth = m_hasIntrinsicSize || (!isPercentageIntrinsicSize && intrinsicSize.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) {
if (m_hasIntrinsicSize)
return computeReplacedLogicalWidthRespectingMinMaxWidth(calcAspectRatioLogicalWidth(), includeMaxWidth);
return static_cast<LayoutUnit>(intrinsicSize.width() * style()->effectiveZoom());
}
bool hasIntrinsicHeight = m_hasIntrinsicSize || (!isPercentageIntrinsicSize && intrinsicSize.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 = computeReplacedLogicalHeightUsing(style()->logicalHeight());
return computeReplacedLogicalWidthRespectingMinMaxWidth(static_cast<LayoutUnit>(ceil(logicalHeight * intrinsicRatio)));
}
// 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 && contentRenderer) {
// 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;
if (RenderBlock* blockWithWidth = firstContainingBlockWithLogicalWidth(this))
logicalWidth = blockWithWidth->computeReplacedLogicalWidthRespectingMinMaxWidth(blockWithWidth->computeReplacedLogicalWidthUsing(blockWithWidth->style()->logicalWidth()), false);
else
logicalWidth = containingBlock()->availableLogicalWidth();
// This solves above equation for 'width' (== logicalWidth).
LayoutUnit marginStart = style()->marginStart().calcMinValue(logicalWidth);
LayoutUnit marginEnd = style()->marginEnd().calcMinValue(logicalWidth);
logicalWidth = max(0, logicalWidth - (marginStart + marginEnd + (width() - clientWidth())));
if (isPercentageIntrinsicSize)
// FIXME: Remove unnecessary rounding when layout is off ints: webkit.org/b/63656
logicalWidth = static_cast<LayoutUnit>(round(logicalWidth * intrinsicSize.width() / 100));
return computeReplacedLogicalWidthRespectingMinMaxWidth(logicalWidth);
}
}
// 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) {
if (isPercentageIntrinsicSize || m_hasIntrinsicSize)
return computeReplacedLogicalWidthRespectingMinMaxWidth(calcAspectRatioLogicalWidth(), includeMaxWidth);
return static_cast<LayoutUnit>(intrinsicSize.width() * style()->effectiveZoom());
}
// 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.
return computeReplacedLogicalWidthRespectingMinMaxWidth(cDefaultWidth, includeMaxWidth);
}
return computeReplacedLogicalWidthRespectingMinMaxWidth(intrinsicLogicalWidth(), includeMaxWidth);
}
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 intrinsicSize;
if (contentRenderer)
contentRenderer->computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio, isPercentageIntrinsicSize);
else
computeIntrinsicRatioInformation(intrinsicSize, intrinsicRatio, isPercentageIntrinsicSize);
if (intrinsicRatio && !isHorizontalWritingMode())
intrinsicRatio = 1 / intrinsicRatio;
bool widthIsAuto = style()->logicalWidth().isAuto();
bool hasIntrinsicHeight = m_hasIntrinsicSize || (!isPercentageIntrinsicSize && intrinsicSize.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) {
if (m_hasIntrinsicSize)
return computeReplacedLogicalHeightRespectingMinMaxHeight(calcAspectRatioLogicalHeight());
return static_cast<LayoutUnit>(intrinsicSize.height() * style()->effectiveZoom());
}
// 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 && !isPercentageIntrinsicSize) {
// FIXME: Remove unnecessary rounding when layout is off ints: webkit.org/b/63656
return computeReplacedLogicalHeightRespectingMinMaxHeight(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) {
if (m_hasIntrinsicSize)
return computeReplacedLogicalHeightRespectingMinMaxHeight(calcAspectRatioLogicalHeight());
return static_cast<LayoutUnit>(intrinsicSize.height() * style()->effectiveZoom());
}
// 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(cDefaultHeight);
}
int RenderReplaced::calcAspectRatioLogicalWidth() const
{
int intrinsicWidth = intrinsicLogicalWidth();
int intrinsicHeight = intrinsicLogicalHeight();
if (!intrinsicHeight)
return 0;
return RenderBox::computeReplacedLogicalHeight() * intrinsicWidth / intrinsicHeight;
}
int RenderReplaced::calcAspectRatioLogicalHeight() const
{
int intrinsicWidth = intrinsicLogicalWidth();
int intrinsicHeight = intrinsicLogicalHeight();
if (!intrinsicWidth)
return 0;
return RenderBox::computeReplacedLogicalWidth() * intrinsicHeight / intrinsicWidth;
}
void RenderReplaced::computePreferredLogicalWidths()
{
ASSERT(preferredLogicalWidthsDirty());
LayoutUnit borderAndPadding = borderAndPaddingWidth();
m_maxPreferredLogicalWidth = computeReplacedLogicalWidth(false) + borderAndPadding;
if (style()->maxWidth().isFixed())
m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, style()->maxWidth().value() + (style()->boxSizing() == CONTENT_BOX ? borderAndPadding : zeroLayoutUnit));
if (hasRelativeDimensions())
m_minPreferredLogicalWidth = 0;
else
m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth;
setPreferredLogicalWidthsDirty(false);
}
VisiblePosition 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 createVisiblePosition(caretMinOffset(), DOWNSTREAM); // coordinates are above
if (blockDirectionPosition >= bottom)
return createVisiblePosition(caretMaxOffset(), DOWNSTREAM); // coordinates are below
if (node()) {
if (lineDirectionPosition <= logicalLeft() + (logicalWidth() / 2))
return createVisiblePosition(0, DOWNSTREAM);
return createVisiblePosition(1, DOWNSTREAM);
}
return RenderBox::positionForPoint(point);
}
LayoutRect RenderReplaced::selectionRectForRepaint(RenderBoxModelObject* 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;
}
IntRect RenderReplaced::localSelectionRect(bool checkWhetherSelected) const
{
if (checkWhetherSelected && !isSelected())
return IntRect();
if (!m_inlineBoxWrapper)
// We're a block-level replaced element. Just return our own dimensions.
return IntRect(IntPoint(), size());
RootInlineBox* root = m_inlineBoxWrapper->root();
int newLogicalTop = root->block()->style()->isFlippedBlocksWritingMode() ? m_inlineBoxWrapper->logicalBottom() - root->selectionBottom() : root->selectionTop() - m_inlineBoxWrapper->logicalTop();
if (root->block()->style()->isHorizontalWritingMode())
return IntRect(0, newLogicalTop, width(), root->selectionHeight());
return IntRect(newLogicalTop, 0, root->selectionHeight(), height());
}
void RenderReplaced::setSelectionState(SelectionState s)
{
RenderBox::setSelectionState(s); // The selection state for our containing block hierarchy is updated by the base class call.
if (m_inlineBoxWrapper) {
RootInlineBox* line = m_inlineBoxWrapper->root();
if (line)
line->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()->hasChildNodes() ? node()->childNodeCount() : 1;
if (s == SelectionEnd)
return selectionEnd == end;
if (s == SelectionBoth)
return selectionStart == 0 && selectionEnd == end;
ASSERT(0);
return false;
}
IntSize RenderReplaced::intrinsicSize() const
{
return m_intrinsicSize;
}
void RenderReplaced::setIntrinsicSize(const IntSize& size)
{
ASSERT(m_hasIntrinsicSize);
m_intrinsicSize = size;
}
LayoutRect RenderReplaced::clippedOverflowRectForRepaint(RenderBoxModelObject* 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 (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());
}
if (style()) {
if (v)
r.inflate(style()->outlineSize());
}
computeRectForRepaint(repaintContainer, r);
return r;
}
}