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/*
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 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 "LegacyInlineFlowBox.h"
#include "CSSPropertyNames.h"
#include "Document.h"
#include "FontCascade.h"
#include "GraphicsContext.h"
#include "HitTestResult.h"
#include "InlineBoxPainter.h"
#include "LegacyEllipsisBox.h"
#include "LegacyInlineTextBox.h"
#include "LegacyRootInlineBox.h"
#include "RenderBlock.h"
#include "RenderInline.h"
#include "RenderLayer.h"
#include "RenderLineBreak.h"
#include "RenderListMarker.h"
#include "RenderRubyBase.h"
#include "RenderRubyRun.h"
#include "RenderRubyText.h"
#include "RenderTableCell.h"
#include "RenderTheme.h"
#include "RenderView.h"
#include "Settings.h"
#include "Text.h"
#include "TextBoxPainter.h"
#include <math.h>
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(LegacyInlineFlowBox);
struct SameSizeAsLegacyInlineFlowBox : public LegacyInlineBox {
uint32_t bitfields : 23;
void* pointers[5];
};
static_assert(sizeof(LegacyInlineFlowBox) == sizeof(SameSizeAsLegacyInlineFlowBox), "LegacyInlineFlowBox should stay small");
#if !ASSERT_WITH_SECURITY_IMPLICATION_DISABLED
LegacyInlineFlowBox::~LegacyInlineFlowBox()
{
setHasBadChildList();
}
void LegacyInlineFlowBox::setHasBadChildList()
{
assertNotDeleted();
if (m_hasBadChildList)
return;
for (auto* child = firstChild(); child; child = child->nextOnLine())
child->setHasBadParent();
m_hasBadChildList = true;
}
#endif
LayoutUnit LegacyInlineFlowBox::getFlowSpacingLogicalWidth()
{
LayoutUnit totalWidth = marginBorderPaddingLogicalLeft() + marginBorderPaddingLogicalRight();
for (auto* child = firstChild(); child; child = child->nextOnLine()) {
if (is<LegacyInlineFlowBox>(*child))
totalWidth += downcast<LegacyInlineFlowBox>(*child).getFlowSpacingLogicalWidth();
}
return totalWidth;
}
static void setHasTextDescendantsOnAncestors(LegacyInlineFlowBox* box)
{
while (box && !box->hasTextDescendants()) {
box->setHasTextDescendants();
box = box->parent();
}
}
void LegacyInlineFlowBox::addToLine(LegacyInlineBox* child)
{
ASSERT(!child->parent());
ASSERT(!child->nextOnLine());
ASSERT(!child->previousOnLine());
checkConsistency();
child->setParent(this);
if (!m_firstChild) {
m_firstChild = child;
m_lastChild = child;
} else {
m_lastChild->setNextOnLine(child);
child->setPreviousOnLine(m_lastChild);
m_lastChild = child;
}
child->setIsFirstLine(isFirstLine());
child->setIsHorizontal(isHorizontal());
if (child->behavesLikeText()) {
if (child->renderer().parent() == &renderer())
m_hasTextChildren = true;
setHasTextDescendantsOnAncestors(this);
} else if (is<LegacyInlineFlowBox>(*child)) {
if (downcast<LegacyInlineFlowBox>(*child).hasTextDescendants())
setHasTextDescendantsOnAncestors(this);
}
if (descendantsHaveSameLineHeightAndBaseline() && !child->renderer().isOutOfFlowPositioned()) {
const RenderStyle& parentStyle = lineStyle();
const RenderStyle& childStyle = child->lineStyle();
bool shouldClearDescendantsHaveSameLineHeightAndBaseline = false;
if (child->renderer().isReplacedOrInlineBlock())
shouldClearDescendantsHaveSameLineHeightAndBaseline = true;
else if (child->behavesLikeText()) {
if (child->renderer().isLineBreak() || child->renderer().parent() != &renderer()) {
if (!parentStyle.fontCascade().metricsOfPrimaryFont().hasIdenticalAscentDescentAndLineGap(childStyle.fontCascade().metricsOfPrimaryFont())
|| parentStyle.lineHeight() != childStyle.lineHeight()
|| (parentStyle.verticalAlign() != VerticalAlign::Baseline && !isRootInlineBox()) || childStyle.verticalAlign() != VerticalAlign::Baseline)
shouldClearDescendantsHaveSameLineHeightAndBaseline = true;
}
if (childStyle.hasTextCombine() || childStyle.textEmphasisMark() != TextEmphasisMark::None)
shouldClearDescendantsHaveSameLineHeightAndBaseline = true;
} else {
if (child->renderer().isLineBreak()) {
// FIXME: This isn't ideal. We only turn off because current layout test results expect the <br> to be 0-height on the baseline.
// Other than making a zillion tests have to regenerate results, there's no reason to ditch the optimization here.
auto childIsHardLinebreak = child->renderer().isBR();
shouldClearDescendantsHaveSameLineHeightAndBaseline = childIsHardLinebreak;
m_hasHardLinebreak = m_hasHardLinebreak || childIsHardLinebreak;
} else {
auto& childFlowBox = downcast<LegacyInlineFlowBox>(*child);
// Check the child's bit, and then also check for differences in font, line-height, vertical-align
if (!childFlowBox.descendantsHaveSameLineHeightAndBaseline()
|| !parentStyle.fontCascade().metricsOfPrimaryFont().hasIdenticalAscentDescentAndLineGap(childStyle.fontCascade().metricsOfPrimaryFont())
|| parentStyle.lineHeight() != childStyle.lineHeight()
|| (parentStyle.verticalAlign() != VerticalAlign::Baseline && !isRootInlineBox()) || childStyle.verticalAlign() != VerticalAlign::Baseline
|| childStyle.hasBorder() || childStyle.hasPadding() || childStyle.hasTextCombine())
shouldClearDescendantsHaveSameLineHeightAndBaseline = true;
}
}
if (shouldClearDescendantsHaveSameLineHeightAndBaseline)
clearDescendantsHaveSameLineHeightAndBaseline();
}
if (!child->renderer().isOutOfFlowPositioned()) {
const RenderStyle& childStyle = child->lineStyle();
if (child->behavesLikeText()) {
const RenderStyle* childStyle = &child->lineStyle();
bool hasMarkers = false;
if (is<LegacyInlineTextBox>(child)) {
const auto* textBox = downcast<LegacyInlineTextBox>(child);
hasMarkers = textBox->hasMarkers();
}
if (childStyle->letterSpacing() < 0 || childStyle->textShadow() || childStyle->textEmphasisMark() != TextEmphasisMark::None || childStyle->hasPositiveStrokeWidth() || hasMarkers || !childStyle->textUnderlineOffset().isAuto() || !childStyle->textDecorationThickness().isAuto() || childStyle->textUnderlinePosition() != TextUnderlinePosition::Auto)
child->clearKnownToHaveNoOverflow();
} else if (child->renderer().isReplacedOrInlineBlock()) {
const RenderBox& box = downcast<RenderBox>(child->renderer());
if (box.hasRenderOverflow() || box.hasSelfPaintingLayer())
child->clearKnownToHaveNoOverflow();
} else if (!child->renderer().isLineBreak() && (childStyle.boxShadow() || child->boxModelObject()->hasSelfPaintingLayer()
|| (is<RenderListMarker>(child->renderer()) && !downcast<RenderListMarker>(child->renderer()).isInside())
|| childStyle.hasBorderImageOutsets()))
child->clearKnownToHaveNoOverflow();
else if (childStyle.hasOutlineInVisualOverflow())
child->clearKnownToHaveNoOverflow();
if (lineStyle().hasOutlineInVisualOverflow())
clearKnownToHaveNoOverflow();
if (knownToHaveNoOverflow() && is<LegacyInlineFlowBox>(*child) && !downcast<LegacyInlineFlowBox>(*child).knownToHaveNoOverflow())
clearKnownToHaveNoOverflow();
}
if (auto* renderInline = dynamicDowncast<RenderInline>(child->renderer()); renderInline && renderInline->hasSelfPaintingLayer())
m_hasSelfPaintInlineBox = true;
checkConsistency();
}
void LegacyInlineFlowBox::removeChild(LegacyInlineBox* child)
{
checkConsistency();
if (!isDirty())
dirtyLineBoxes();
root().childRemoved(child);
if (child == m_firstChild)
m_firstChild = child->nextOnLine();
if (child == m_lastChild)
m_lastChild = child->previousOnLine();
if (child->nextOnLine())
child->nextOnLine()->setPreviousOnLine(child->previousOnLine());
if (child->previousOnLine())
child->previousOnLine()->setNextOnLine(child->nextOnLine());
child->setParent(nullptr);
checkConsistency();
}
void LegacyInlineFlowBox::deleteLine()
{
LegacyInlineBox* child = firstChild();
LegacyInlineBox* next = nullptr;
while (child) {
ASSERT(this == child->parent());
next = child->nextOnLine();
#ifndef NDEBUG
child->setParent(nullptr);
#endif
child->deleteLine();
child = next;
}
#ifndef NDEBUG
m_firstChild = nullptr;
m_lastChild = nullptr;
#endif
removeLineBoxFromRenderObject();
delete this;
}
void LegacyInlineFlowBox::removeLineBoxFromRenderObject()
{
downcast<RenderInline>(renderer()).lineBoxes().removeLineBox(this);
}
void LegacyInlineFlowBox::extractLine()
{
if (!extracted())
extractLineBoxFromRenderObject();
for (auto* child = firstChild(); child; child = child->nextOnLine())
child->extractLine();
}
void LegacyInlineFlowBox::extractLineBoxFromRenderObject()
{
downcast<RenderInline>(renderer()).lineBoxes().extractLineBox(this);
}
void LegacyInlineFlowBox::attachLine()
{
if (extracted())
attachLineBoxToRenderObject();
for (auto* child = firstChild(); child; child = child->nextOnLine())
child->attachLine();
}
void LegacyInlineFlowBox::attachLineBoxToRenderObject()
{
downcast<RenderInline>(renderer()).lineBoxes().attachLineBox(this);
}
void LegacyInlineFlowBox::adjustPosition(float dx, float dy)
{
LegacyInlineBox::adjustPosition(dx, dy);
for (auto* child = firstChild(); child; child = child->nextOnLine())
child->adjustPosition(dx, dy);
if (m_overflow)
m_overflow->move(LayoutUnit(dx), LayoutUnit(dy)); // FIXME: Rounding error here since overflow was pixel snapped, but nobody other than list markers passes non-integral values here.
}
static inline bool isLastChildForRenderer(const RenderElement& ancestor, const RenderObject* child)
{
if (!child)
return false;
if (child == &ancestor)
return true;
const RenderObject* curr = child;
const RenderElement* parent = curr->parent();
while (parent && (!parent->isRenderBlock() || parent->isInline())) {
if (parent->lastChild() != curr)
return false;
if (parent == &ancestor)
return true;
curr = parent;
parent = curr->parent();
}
return true;
}
static bool isAncestorAndWithinBlock(const RenderInline& ancestor, const RenderObject* child)
{
const RenderObject* object = child;
while (object && (!object->isRenderBlock() || object->isInline())) {
if (object == &ancestor)
return true;
object = object->parent();
}
return false;
}
void LegacyInlineFlowBox::determineSpacingForFlowBoxes(bool lastLine, bool isLogicallyLastRunWrapped, RenderObject* logicallyLastRunRenderer)
{
// All boxes start off open. They will not apply any margins/border/padding on
// any side.
bool includeLeftEdge = false;
bool includeRightEdge = false;
// The root inline box never has borders/margins/padding.
if (parent()) {
const auto& inlineFlow = downcast<RenderInline>(renderer());
bool ltr = renderer().style().isLeftToRightDirection();
// Check to see if all initial lines are unconstructed. If so, then
// we know the inline began on this line (unless we are a continuation).
const auto& lineBoxList = inlineFlow.lineBoxes();
if (!lineBoxList.firstLineBox()->isConstructed() && !inlineFlow.isContinuation()) {
#if ENABLE(CSS_BOX_DECORATION_BREAK)
if (renderer().style().boxDecorationBreak() == BoxDecorationBreak::Clone)
includeLeftEdge = includeRightEdge = true;
else
#endif
if (ltr && lineBoxList.firstLineBox() == this)
includeLeftEdge = true;
else if (!ltr && lineBoxList.lastLineBox() == this)
includeRightEdge = true;
}
if (!lineBoxList.lastLineBox()->isConstructed()) {
bool isLastObjectOnLine = !isAncestorAndWithinBlock(inlineFlow, logicallyLastRunRenderer) || (isLastChildForRenderer(renderer(), logicallyLastRunRenderer) && !isLogicallyLastRunWrapped);
// We include the border under these conditions:
// (1) The next line was not created, or it is constructed. We check the previous line for rtl.
// (2) The logicallyLastRun is not a descendant of this renderer.
// (3) The logicallyLastRun is a descendant of this renderer, but it is the last child of this renderer and it does not wrap to the next line.
#if ENABLE(CSS_BOX_DECORATION_BREAK)
// (4) The decoration break is set to clone therefore there will be borders on every sides.
if (renderer().style().boxDecorationBreak() == BoxDecorationBreak::Clone)
includeLeftEdge = includeRightEdge = true;
else
#endif
if (ltr) {
if (!nextLineBox()
&& ((lastLine || isLastObjectOnLine) && !inlineFlow.continuation()))
includeRightEdge = true;
} else {
if ((!prevLineBox() || prevLineBox()->isConstructed())
&& ((lastLine || isLastObjectOnLine) && !inlineFlow.continuation()))
includeLeftEdge = true;
}
}
}
setEdges(includeLeftEdge, includeRightEdge);
// Recur into our children.
for (auto* child = firstChild(); child; child = child->nextOnLine()) {
if (is<LegacyInlineFlowBox>(*child))
downcast<LegacyInlineFlowBox>(*child).determineSpacingForFlowBoxes(lastLine, isLogicallyLastRunWrapped, logicallyLastRunRenderer);
}
}
float LegacyInlineFlowBox::placeBoxesInInlineDirection(float logicalLeft, bool& needsWordSpacing)
{
// Set our x position.
beginPlacingBoxRangesInInlineDirection(logicalLeft);
float startLogicalLeft = logicalLeft;
logicalLeft += borderLogicalLeft() + paddingLogicalLeft();
float minLogicalLeft = startLogicalLeft;
float maxLogicalRight = logicalLeft;
placeBoxRangeInInlineDirection(firstChild(), nullptr, logicalLeft, minLogicalLeft, maxLogicalRight, needsWordSpacing);
logicalLeft += borderLogicalRight() + paddingLogicalRight();
endPlacingBoxRangesInInlineDirection(startLogicalLeft, logicalLeft, minLogicalLeft, maxLogicalRight);
return logicalLeft;
}
float LegacyInlineFlowBox::placeBoxRangeInInlineDirection(LegacyInlineBox* firstChild, LegacyInlineBox* lastChild, float& logicalLeft, float& minLogicalLeft, float& maxLogicalRight, bool& needsWordSpacing)
{
float totalExpansion = 0;
for (auto* child = firstChild; child && child != lastChild; child = child->nextOnLine()) {
if (is<RenderText>(child->renderer())) {
auto& textBox = downcast<LegacyInlineTextBox>(*child);
RenderText& renderText = textBox.renderer();
if (renderText.text().length()) {
if (needsWordSpacing && isSpaceOrNewline(renderText.characterAt(textBox.start())))
logicalLeft += textBox.lineStyle().fontCascade().wordSpacing();
needsWordSpacing = !isSpaceOrNewline(renderText.characterAt(textBox.end() - 1));
}
textBox.setLogicalLeft(logicalLeft);
if (knownToHaveNoOverflow())
minLogicalLeft = std::min(logicalLeft, minLogicalLeft);
logicalLeft += textBox.logicalWidth();
totalExpansion += textBox.expansion();
if (knownToHaveNoOverflow())
maxLogicalRight = std::max(logicalLeft, maxLogicalRight);
} else {
if (child->renderer().isOutOfFlowPositioned()) {
if (child->renderer().parent()->style().isLeftToRightDirection())
child->setLogicalLeft(logicalLeft);
else
// Our offset that we cache needs to be from the edge of the right border box and
// not the left border box. We have to subtract |x| from the width of the block
// (which can be obtained from the root line box).
child->setLogicalLeft(root().blockFlow().logicalWidth() - logicalLeft);
continue; // The positioned object has no effect on the width.
}
if (is<RenderInline>(child->renderer())) {
auto& flow = downcast<LegacyInlineFlowBox>(*child);
logicalLeft += flow.marginLogicalLeft();
if (knownToHaveNoOverflow())
minLogicalLeft = std::min(logicalLeft, minLogicalLeft);
logicalLeft = flow.placeBoxesInInlineDirection(logicalLeft, needsWordSpacing);
totalExpansion += flow.expansion();
if (knownToHaveNoOverflow())
maxLogicalRight = std::max(logicalLeft, maxLogicalRight);
logicalLeft += flow.marginLogicalRight();
} else if (!is<RenderListMarker>(child->renderer()) || downcast<RenderListMarker>(child->renderer()).isInside()) {
// The box can have a different writing-mode than the overall line, so this is a bit complicated.
// Just get all the physical margin and overflow values by hand based off |isVertical|.
LayoutUnit logicalLeftMargin = isHorizontal() ? child->boxModelObject()->marginLeft() : child->boxModelObject()->marginTop();
LayoutUnit logicalRightMargin = isHorizontal() ? child->boxModelObject()->marginRight() : child->boxModelObject()->marginBottom();
logicalLeft += logicalLeftMargin;
child->setLogicalLeft(logicalLeft);
if (knownToHaveNoOverflow())
minLogicalLeft = std::min(logicalLeft, minLogicalLeft);
logicalLeft += child->logicalWidth();
if (knownToHaveNoOverflow())
maxLogicalRight = std::max(logicalLeft, maxLogicalRight);
logicalLeft += logicalRightMargin;
// If we encounter any space after this inline block then ensure it is treated as the space between two words.
needsWordSpacing = true;
}
}
}
setExpansionWithoutGrowing(totalExpansion);
return logicalLeft;
}
bool LegacyInlineFlowBox::requiresIdeographicBaseline(const GlyphOverflowAndFallbackFontsMap& textBoxDataMap) const
{
if (isHorizontal())
return false;
const RenderStyle& lineStyle = this->lineStyle();
if (lineStyle.fontDescription().orientation() == FontOrientation::Vertical
|| lineStyle.fontCascade().primaryFont().hasVerticalGlyphs())
return true;
for (auto* child = firstChild(); child; child = child->nextOnLine()) {
if (child->renderer().isOutOfFlowPositioned())
continue; // Positioned placeholders don't affect calculations.
if (is<LegacyInlineFlowBox>(*child)) {
if (downcast<LegacyInlineFlowBox>(*child).requiresIdeographicBaseline(textBoxDataMap))
return true;
} else {
if (child->lineStyle().fontCascade().primaryFont().hasVerticalGlyphs())
return true;
const Vector<const Font*>* usedFonts = nullptr;
if (is<LegacyInlineTextBox>(*child)) {
GlyphOverflowAndFallbackFontsMap::const_iterator it = textBoxDataMap.find(downcast<LegacyInlineTextBox>(child));
usedFonts = it == textBoxDataMap.end() ? nullptr : &it->value.first;
}
if (usedFonts) {
for (const Font* font : *usedFonts) {
if (font->hasVerticalGlyphs())
return true;
}
}
}
}
return false;
}
static bool verticalAlignApplies(const RenderObject& renderer)
{
// http://www.w3.org/TR/CSS2/visudet.html#propdef-vertical-align - vertical-align only applies to inline level and table-cell elements.
// FIXME: Ideally we would only align inline level boxes which means that text inside an inline box would just sit on the box itself.
if (!renderer.isText())
return true;
auto& parentRenderer = *renderer.parent();
return (parentRenderer.isInline() && parentRenderer.style().display() != DisplayType::InlineBlock) || parentRenderer.isTableCell();
}
void LegacyInlineFlowBox::adjustMaxAscentAndDescent(LayoutUnit& maxAscent, LayoutUnit& maxDescent, LayoutUnit maxPositionTop, LayoutUnit maxPositionBottom)
{
for (auto* child = firstChild(); child; child = child->nextOnLine()) {
// The computed lineheight needs to be extended for the
// positioned elements
if (child->renderer().isOutOfFlowPositioned())
continue; // Positioned placeholders don't affect calculations.
if ((child->verticalAlign() == VerticalAlign::Top || child->verticalAlign() == VerticalAlign::Bottom) && verticalAlignApplies(child->renderer())) {
auto lineHeight = child->lineHeight();
if (child->verticalAlign() == VerticalAlign::Top) {
if (maxAscent + maxDescent < lineHeight)
maxDescent = lineHeight - maxAscent;
} else {
if (maxAscent + maxDescent < lineHeight)
maxAscent = lineHeight - maxDescent;
}
if (maxAscent + maxDescent >= std::max(maxPositionTop, maxPositionBottom))
break;
}
if (is<LegacyInlineFlowBox>(*child))
downcast<LegacyInlineFlowBox>(*child).adjustMaxAscentAndDescent(maxAscent, maxDescent, maxPositionTop, maxPositionBottom);
}
}
void LegacyInlineFlowBox::computeLogicalBoxHeights(LegacyRootInlineBox& rootBox, LayoutUnit& maxPositionTop, LayoutUnit& maxPositionBottom,
LayoutUnit& maxAscent, LayoutUnit& maxDescent, bool& setMaxAscent, bool& setMaxDescent,
bool strictMode, GlyphOverflowAndFallbackFontsMap& textBoxDataMap,
FontBaseline baselineType, VerticalPositionCache& verticalPositionCache)
{
// The primary purpose of this function is to compute the maximal ascent and descent values for
// a line. These values are computed based off the block's line-box-contain property, which indicates
// what parts of descendant boxes have to fit within the line.
//
// The maxAscent value represents the distance of the highest point of any box (typically including line-height) from
// the root box's baseline. The maxDescent value represents the distance of the lowest point of any box
// (also typically including line-height) from the root box baseline. These values can be negative.
//
// A secondary purpose of this function is to store the offset of every box's baseline from the root box's
// baseline. This information is cached in the logicalTop() of every box. We're effectively just using
// the logicalTop() as scratch space.
//
// Because a box can be positioned such that it ends up fully above or fully below the
// root line box, we only consider it to affect the maxAscent and maxDescent values if some
// part of the box (EXCLUDING leading) is above (for ascent) or below (for descent) the root box's baseline.
bool affectsAscent = false;
bool affectsDescent = false;
bool checkChildren = !descendantsHaveSameLineHeightAndBaseline();
if (isRootInlineBox()) {
// Examine our root box.
LayoutUnit ascent;
LayoutUnit descent;
rootBox.ascentAndDescentForBox(rootBox, textBoxDataMap, ascent, descent, affectsAscent, affectsDescent);
if (strictMode || hasTextChildren() || (!checkChildren && hasTextDescendants())) {
if (maxAscent < ascent || !setMaxAscent) {
maxAscent = ascent;
setMaxAscent = true;
}
if (maxDescent < descent || !setMaxDescent) {
maxDescent = descent;
setMaxDescent = true;
}
}
}
if (!checkChildren)
return;
Vector<LegacyInlineBox*> maxAscentInlineBoxList;
for (auto* child = firstChild(); child; child = child->nextOnLine()) {
if (child->renderer().isOutOfFlowPositioned())
continue; // Positioned placeholders don't affect calculations.
auto* inlineFlowBox = dynamicDowncast<LegacyInlineFlowBox>(*child);
bool affectsAscent = false;
bool affectsDescent = false;
// The verticalPositionForBox function returns the distance between the child box's baseline
// and the root box's baseline. The value is negative if the child box's baseline is above the
// root box's baseline, and it is positive if the child box's baseline is below the root box's baseline.
child->setLogicalTop(rootBox.verticalPositionForBox(child, verticalPositionCache));
LayoutUnit ascent;
LayoutUnit descent;
rootBox.ascentAndDescentForBox(*child, textBoxDataMap, ascent, descent, affectsAscent, affectsDescent);
LayoutUnit boxHeight = ascent + descent;
if (child->verticalAlign() == VerticalAlign::Top && verticalAlignApplies(child->renderer())) {
if (maxPositionTop < boxHeight)
maxPositionTop = boxHeight;
} else if (child->verticalAlign() == VerticalAlign::Bottom && verticalAlignApplies(child->renderer())) {
if (maxPositionBottom < boxHeight)
maxPositionBottom = boxHeight;
} else if (strictMode
|| !inlineFlowBox
|| inlineFlowBox->hasTextChildren()
|| (inlineFlowBox->descendantsHaveSameLineHeightAndBaseline() && inlineFlowBox->hasTextDescendants())
|| inlineFlowBox->renderer().hasInlineDirectionBordersOrPadding()
|| inlineFlowBox->hasHardLinebreak()) {
// Note that these values can be negative. Even though we only affect the maxAscent and maxDescent values
// if our box (excluding line-height) was above (for ascent) or below (for descent) the root baseline, once you factor in line-height
// the final box can end up being fully above or fully below the root box's baseline! This is ok, but what it
// means is that ascent and descent (including leading), can end up being negative. The setMaxAscent and
// setMaxDescent booleans are used to ensure that we're willing to initially set maxAscent/Descent to negative
// values.
ascent -= floorf(child->logicalTop());
auto isMaxAscent = false;
if (affectsAscent) {
if (maxAscent < ascent || !setMaxAscent) {
maxAscent = ascent;
setMaxAscent = true;
maxAscentInlineBoxList.clear();
}
isMaxAscent = maxAscent == ascent;
if (isMaxAscent) {
// A line can have multiple inline boxes with the same max ascent.
maxAscentInlineBoxList.append(child);
}
}
// In order to make sure the inline level box is fully enclosed, we should always ceil the descent (containing block's height is max ascent + max descent).
// However when the box's logical top is floored (see below), the descent value should also be adjusted in the same direction.
descent += isMaxAscent ? floorf(child->logicalTop()) : ceilf(child->logicalTop());
if (affectsDescent && (maxDescent < descent || !setMaxDescent)) {
maxDescent = descent;
setMaxDescent = true;
}
}
if (inlineFlowBox) {
inlineFlowBox->computeLogicalBoxHeights(rootBox, maxPositionTop, maxPositionBottom, maxAscent, maxDescent,
setMaxAscent, setMaxDescent, strictMode, textBoxDataMap, baselineType, verticalPositionCache);
}
}
for (auto* inlineBox : maxAscentInlineBoxList) {
// When the inline box stretches the ascent, we floor the logical top value to make sure the inline box does not
// stick out of block container at the top (see above).
// In such cases the logical top also needs to be adjusted to match this stretched ascent geometry.
// (not doing so will result a subpixel logical top offset while it should be flushed with the top edge)
inlineBox->setLogicalTop(floorf(inlineBox->logicalTop()));
}
}
static void placeChildInlineBoxesInBlockDirection(LegacyInlineFlowBox& inlineBox, LayoutUnit top, LayoutUnit maxHeight, int maxAscent, bool strictMode, LayoutUnit& lineTop, LayoutUnit& lineBottom, bool& setLineTop,
LayoutUnit& lineTopIncludingMargins, LayoutUnit& lineBottomIncludingMargins, bool& hasAnnotationsBefore, bool& hasAnnotationsAfter, FontBaseline baselineType)
{
LayoutUnit adjustmentForChildrenWithSameLineHeightAndBaseline;
if (inlineBox.descendantsHaveSameLineHeightAndBaseline()) {
adjustmentForChildrenWithSameLineHeightAndBaseline = inlineBox.logicalTop();
if (inlineBox.parent())
adjustmentForChildrenWithSameLineHeightAndBaseline += inlineBox.renderer().borderAndPaddingBefore();
}
for (auto* child = inlineBox.firstChild(); child; child = child->nextOnLine()) {
if (child->renderer().isOutOfFlowPositioned())
continue; // Positioned placeholders don't affect calculations.
if (inlineBox.descendantsHaveSameLineHeightAndBaseline()) {
child->adjustBlockDirectionPosition(adjustmentForChildrenWithSameLineHeightAndBaseline);
continue;
}
auto* inlineFlowBox = dynamicDowncast<LegacyInlineFlowBox>(*child);
bool childAffectsTopBottomPos = true;
if (child->verticalAlign() == VerticalAlign::Top && verticalAlignApplies(child->renderer()))
child->setLogicalTop(top);
else if (child->verticalAlign() == VerticalAlign::Bottom && verticalAlignApplies(child->renderer()))
child->setLogicalTop(top + maxHeight - child->lineHeight());
else {
if (!strictMode && inlineFlowBox && !inlineFlowBox->hasTextChildren() && !inlineFlowBox->renderer().hasInlineDirectionBordersOrPadding()
&& !(inlineFlowBox->descendantsHaveSameLineHeightAndBaseline() && inlineFlowBox->hasTextDescendants()))
childAffectsTopBottomPos = false;
LayoutUnit posAdjust = maxAscent - child->baselinePosition(baselineType);
child->setLogicalTop(child->logicalTop() + top + posAdjust);
}
LayoutUnit newLogicalTop { child->logicalTop() };
LayoutUnit newLogicalTopIncludingMargins = newLogicalTop;
LayoutUnit boxHeight { child->logicalHeight() };
LayoutUnit boxHeightIncludingMargins = boxHeight;
const RenderStyle& childLineStyle = child->lineStyle();
if (child->behavesLikeText() || is<LegacyInlineFlowBox>(*child)) {
const FontMetrics& fontMetrics = childLineStyle.metricsOfPrimaryFont();
newLogicalTop += child->baselinePosition(baselineType) - fontMetrics.ascent(baselineType);
if (is<LegacyInlineFlowBox>(*child)) {
RenderBoxModelObject& boxObject = downcast<LegacyInlineFlowBox>(*child).renderer();
newLogicalTop -= childLineStyle.isHorizontalWritingMode()
? boxObject.borderTop() + boxObject.paddingTop()
: boxObject.borderRight() + boxObject.paddingRight();
}
newLogicalTopIncludingMargins = newLogicalTop;
} else if (!child->renderer().isBR()) {
const auto& box = downcast<RenderBox>(child->renderer());
newLogicalTopIncludingMargins = newLogicalTop;
// We may flip lines in case of verticalLR mode, so we can assume verticalRL for now.
LayoutUnit overSideMargin = child->isHorizontal() ? box.marginTop() : box.marginRight();
LayoutUnit underSideMargin = child->isHorizontal() ? box.marginBottom() : box.marginLeft();
newLogicalTop += overSideMargin;
boxHeightIncludingMargins += overSideMargin + underSideMargin;
}
child->setLogicalTop(newLogicalTop);
if (childAffectsTopBottomPos) {
if (is<RenderRubyRun>(child->renderer())) {
// Treat the leading on the first and last lines of ruby runs as not being part of the overall lineTop/lineBottom.
// Really this is a workaround hack for the fact that ruby should have been done as line layout and not done using
// inline-block.
if (inlineBox.renderer().style().isFlippedLinesWritingMode() == (child->renderer().style().rubyPosition() == RubyPosition::After))
hasAnnotationsBefore = true;
else
hasAnnotationsAfter = true;
auto& rubyRun = downcast<RenderRubyRun>(child->renderer());
if (RenderRubyBase* rubyBase = rubyRun.rubyBase()) {
LayoutUnit bottomRubyBaseLeading { (child->logicalHeight() - rubyBase->logicalBottom()) + rubyBase->logicalHeight() - (rubyBase->lastRootBox() ? rubyBase->lastRootBox()->lineBottom() : 0_lu) };
LayoutUnit topRubyBaseLeading = rubyBase->logicalTop() + (rubyBase->firstRootBox() ? rubyBase->firstRootBox()->lineTop() : 0_lu);
newLogicalTop += !inlineBox.renderer().style().isFlippedLinesWritingMode() ? topRubyBaseLeading : bottomRubyBaseLeading;
boxHeight -= (topRubyBaseLeading + bottomRubyBaseLeading);
}
}
if (is<LegacyInlineTextBox>(*child)) {
if (std::optional<bool> markExistsAndIsAbove = downcast<LegacyInlineTextBox>(*child).emphasisMarkExistsAndIsAbove(childLineStyle)) {
if (*markExistsAndIsAbove != childLineStyle.isFlippedLinesWritingMode())
hasAnnotationsBefore = true;
else
hasAnnotationsAfter = true;
}
}
if (!setLineTop) {
setLineTop = true;
lineTop = newLogicalTop;
lineTopIncludingMargins = std::min(lineTop, newLogicalTopIncludingMargins);
} else {
lineTop = std::min(lineTop, newLogicalTop);
lineTopIncludingMargins = std::min(lineTop, std::min(lineTopIncludingMargins, newLogicalTopIncludingMargins));
}
lineBottom = std::max(lineBottom, newLogicalTop + boxHeight);
lineBottomIncludingMargins = std::max(lineBottom, std::max(lineBottomIncludingMargins, newLogicalTopIncludingMargins + boxHeightIncludingMargins));
}
// Adjust boxes to use their real box y/height and not the logical height (as dictated by
// line-height).
if (inlineFlowBox) {
inlineFlowBox->placeBoxesInBlockDirection(top, maxHeight, maxAscent, strictMode, lineTop, lineBottom, setLineTop,
lineTopIncludingMargins, lineBottomIncludingMargins, hasAnnotationsBefore, hasAnnotationsAfter, baselineType);
}
}
}
void LegacyInlineFlowBox::placeBoxesInBlockDirection(LayoutUnit top, LayoutUnit maxHeight, int maxAscent, bool strictMode, LayoutUnit& lineTop, LayoutUnit& lineBottom, bool& setLineTop,
LayoutUnit& lineTopIncludingMargins, LayoutUnit& lineBottomIncludingMargins, bool& hasAnnotationsBefore, bool& hasAnnotationsAfter, FontBaseline baselineType)
{
bool isRootBox = isRootInlineBox();
if (isRootBox)
setLogicalTop(top + maxAscent - lineStyle().metricsOfPrimaryFont().ascent(baselineType));
placeChildInlineBoxesInBlockDirection(*this, top, maxHeight, maxAscent, strictMode, lineTop, lineBottom, setLineTop, lineTopIncludingMargins, lineBottomIncludingMargins, hasAnnotationsBefore, hasAnnotationsAfter, baselineType);
if (isRootBox) {
if (strictMode || hasTextChildren() || (descendantsHaveSameLineHeightAndBaseline() && hasTextDescendants())) {
if (!setLineTop) {
setLineTop = true;
lineTop = logicalTop();
lineTopIncludingMargins = lineTop;
} else {
lineTop = std::min(lineTop, LayoutUnit(logicalTop()));
lineTopIncludingMargins = std::min(lineTop, lineTopIncludingMargins);
}
lineBottom = std::max(lineBottom, LayoutUnit(logicalBottom()));
lineBottomIncludingMargins = std::max(lineBottom, lineBottomIncludingMargins);
}
if (renderer().style().isFlippedLinesWritingMode())
flipLinesInBlockDirection(lineTopIncludingMargins, lineBottomIncludingMargins);
}
}
void LegacyInlineFlowBox::flipLinesInBlockDirection(LayoutUnit lineTop, LayoutUnit lineBottom)
{
// Flip the box on the line such that the top is now relative to the lineBottom instead of the lineTop.
setLogicalTop(lineBottom - (logicalTop() - lineTop) - logicalHeight());
for (auto* child = firstChild(); child; child = child->nextOnLine()) {
if (child->renderer().isOutOfFlowPositioned())
continue; // Positioned placeholders aren't affected here.
if (is<LegacyInlineFlowBox>(*child))
downcast<LegacyInlineFlowBox>(*child).flipLinesInBlockDirection(lineTop, lineBottom);
else
child->setLogicalTop(lineBottom - (child->logicalTop() - lineTop) - child->logicalHeight());
}
}
inline void LegacyInlineFlowBox::addBoxShadowVisualOverflow(LayoutRect& logicalVisualOverflow)
{
// box-shadow on root line boxes is applying to the block and not to the lines.
if (!parent())
return;
const RenderStyle& lineStyle = this->lineStyle();
if (!lineStyle.boxShadow())
return;
LayoutUnit boxShadowLogicalTop;
LayoutUnit boxShadowLogicalBottom;
lineStyle.getBoxShadowBlockDirectionExtent(boxShadowLogicalTop, boxShadowLogicalBottom);
// Similar to how glyph overflow works, if our lines are flipped, then it's actually the opposite shadow that applies, since
// the line is "upside down" in terms of block coordinates.
LayoutUnit shadowLogicalTop = lineStyle.isFlippedLinesWritingMode() ? -boxShadowLogicalBottom : boxShadowLogicalTop;
LayoutUnit shadowLogicalBottom = lineStyle.isFlippedLinesWritingMode() ? -boxShadowLogicalTop : boxShadowLogicalBottom;
LayoutUnit logicalTopVisualOverflow = std::min(LayoutUnit(logicalTop() + shadowLogicalTop), logicalVisualOverflow.y());
LayoutUnit logicalBottomVisualOverflow = std::max(LayoutUnit(logicalBottom() + shadowLogicalBottom), logicalVisualOverflow.maxY());
LayoutUnit boxShadowLogicalLeft;
LayoutUnit boxShadowLogicalRight;
lineStyle.getBoxShadowInlineDirectionExtent(boxShadowLogicalLeft, boxShadowLogicalRight);
LayoutUnit logicalLeftVisualOverflow = std::min(LayoutUnit(logicalLeft() + boxShadowLogicalLeft), logicalVisualOverflow.x());
LayoutUnit logicalRightVisualOverflow = std::max(LayoutUnit(logicalRight() + boxShadowLogicalRight), logicalVisualOverflow.maxX());
logicalVisualOverflow = LayoutRect(logicalLeftVisualOverflow, logicalTopVisualOverflow, logicalRightVisualOverflow - logicalLeftVisualOverflow, logicalBottomVisualOverflow - logicalTopVisualOverflow);
}
inline void LegacyInlineFlowBox::addBorderOutsetVisualOverflow(LayoutRect& logicalVisualOverflow)
{
// border-image-outset on root line boxes is applying to the block and not to the lines.
if (!parent())
return;
const RenderStyle& lineStyle = this->lineStyle();
if (!lineStyle.hasBorderImageOutsets())
return;
LayoutBoxExtent borderOutsets = lineStyle.borderImageOutsets();
LayoutUnit borderOutsetLogicalTop = borderOutsets.before(lineStyle.writingMode());
LayoutUnit borderOutsetLogicalBottom = borderOutsets.after(lineStyle.writingMode());
LayoutUnit borderOutsetLogicalLeft = borderOutsets.start(lineStyle.writingMode());
LayoutUnit borderOutsetLogicalRight = borderOutsets.end(lineStyle.writingMode());
// Similar to how glyph overflow works, if our lines are flipped, then it's actually the opposite border that applies, since
// the line is "upside down" in terms of block coordinates. vertical-rl and horizontal-bt are the flipped line modes.
LayoutUnit outsetLogicalTop = lineStyle.isFlippedLinesWritingMode() ? borderOutsetLogicalBottom : borderOutsetLogicalTop;
LayoutUnit outsetLogicalBottom = lineStyle.isFlippedLinesWritingMode() ? borderOutsetLogicalTop : borderOutsetLogicalBottom;
LayoutUnit logicalTopVisualOverflow = std::min(LayoutUnit(logicalTop() - outsetLogicalTop), logicalVisualOverflow.y());
LayoutUnit logicalBottomVisualOverflow = std::max(LayoutUnit(logicalBottom() + outsetLogicalBottom), logicalVisualOverflow.maxY());
LayoutUnit outsetLogicalLeft = includeLogicalLeftEdge() ? borderOutsetLogicalLeft : 0_lu;
LayoutUnit outsetLogicalRight = includeLogicalRightEdge() ? borderOutsetLogicalRight : 0_lu;
LayoutUnit logicalLeftVisualOverflow = std::min(LayoutUnit(logicalLeft() - outsetLogicalLeft), logicalVisualOverflow.x());
LayoutUnit logicalRightVisualOverflow = std::max(LayoutUnit(logicalRight() + outsetLogicalRight), logicalVisualOverflow.maxX());
logicalVisualOverflow = LayoutRect(logicalLeftVisualOverflow, logicalTopVisualOverflow, logicalRightVisualOverflow - logicalLeftVisualOverflow, logicalBottomVisualOverflow - logicalTopVisualOverflow);
}
inline void LegacyInlineFlowBox::addTextBoxVisualOverflow(LegacyInlineTextBox& textBox, GlyphOverflowAndFallbackFontsMap& textBoxDataMap, LayoutRect& logicalVisualOverflow)
{
if (textBox.knownToHaveNoOverflow())
return;
const RenderStyle& lineStyle = this->lineStyle();
GlyphOverflowAndFallbackFontsMap::iterator it = textBoxDataMap.find(&textBox);
GlyphOverflow* glyphOverflow = it == textBoxDataMap.end() ? nullptr : &it->value.second;
bool isFlippedLine = lineStyle.isFlippedLinesWritingMode();
auto topGlyphEdge = glyphOverflow ? (isFlippedLine ? glyphOverflow->bottom : glyphOverflow->top) : 0_lu;
auto bottomGlyphEdge = glyphOverflow ? (isFlippedLine ? glyphOverflow->top : glyphOverflow->bottom) : 0_lu;
auto leftGlyphEdge = glyphOverflow ? glyphOverflow->left : 0_lu;
auto rightGlyphEdge = glyphOverflow ? glyphOverflow->right : 0_lu;
auto viewportSize = textBox.renderer().frame().view() ? textBox.renderer().frame().view()->size() : IntSize();
LayoutUnit strokeOverflow(std::ceil(lineStyle.computedStrokeWidth(viewportSize) / 2.0f));
auto topGlyphOverflow = -strokeOverflow - topGlyphEdge;
auto bottomGlyphOverflow = strokeOverflow + bottomGlyphEdge;
auto leftGlyphOverflow = -strokeOverflow - leftGlyphEdge;
auto rightGlyphOverflow = strokeOverflow + rightGlyphEdge;
if (std::optional<bool> markExistsAndIsAbove = textBox.emphasisMarkExistsAndIsAbove(lineStyle)) {
LayoutUnit emphasisMarkHeight = lineStyle.fontCascade().emphasisMarkHeight(lineStyle.textEmphasisMarkString());
if (*markExistsAndIsAbove == !lineStyle.isFlippedLinesWritingMode())
topGlyphOverflow = std::min(topGlyphOverflow, -emphasisMarkHeight);
else
bottomGlyphOverflow = std::max(bottomGlyphOverflow, emphasisMarkHeight);
}
// If letter-spacing is negative, we should factor that into right layout overflow. (Even in RTL, letter-spacing is
// applied to the right, so this is not an issue with left overflow.
rightGlyphOverflow -= std::min(0, (int)lineStyle.fontCascade().letterSpacing());
LayoutUnit textShadowLogicalTop;
LayoutUnit textShadowLogicalBottom;
lineStyle.getTextShadowBlockDirectionExtent(textShadowLogicalTop, textShadowLogicalBottom);
LayoutUnit childOverflowLogicalTop = std::min<LayoutUnit>(textShadowLogicalTop + topGlyphOverflow, topGlyphOverflow);
LayoutUnit childOverflowLogicalBottom = std::max<LayoutUnit>(textShadowLogicalBottom + bottomGlyphOverflow, bottomGlyphOverflow);
LayoutUnit textShadowLogicalLeft;
LayoutUnit textShadowLogicalRight;
lineStyle.getTextShadowInlineDirectionExtent(textShadowLogicalLeft, textShadowLogicalRight);
LayoutUnit childOverflowLogicalLeft = std::min<LayoutUnit>(textShadowLogicalLeft + leftGlyphOverflow, leftGlyphOverflow);
LayoutUnit childOverflowLogicalRight = std::max<LayoutUnit>(textShadowLogicalRight + rightGlyphOverflow, rightGlyphOverflow);
LayoutUnit logicalTopVisualOverflow = std::min(LayoutUnit(textBox.logicalTop() + childOverflowLogicalTop), logicalVisualOverflow.y());
LayoutUnit logicalBottomVisualOverflow = std::max(LayoutUnit(textBox.logicalBottom() + childOverflowLogicalBottom), logicalVisualOverflow.maxY());
LayoutUnit logicalLeftVisualOverflow = std::min(LayoutUnit(textBox.logicalLeft() + childOverflowLogicalLeft), logicalVisualOverflow.x());
LayoutUnit logicalRightVisualOverflow = std::max(LayoutUnit(textBox.logicalRight() + childOverflowLogicalRight), logicalVisualOverflow.maxX());
logicalVisualOverflow = LayoutRect(logicalLeftVisualOverflow, logicalTopVisualOverflow, logicalRightVisualOverflow - logicalLeftVisualOverflow, logicalBottomVisualOverflow - logicalTopVisualOverflow);
auto documentMarkerBounds = LegacyTextBoxPainter::calculateUnionOfAllDocumentMarkerBounds(textBox);
documentMarkerBounds.move(textBox.logicalLeft(), textBox.logicalTop());
logicalVisualOverflow = unionRect(logicalVisualOverflow, LayoutRect(documentMarkerBounds));
textBox.setLogicalOverflowRect(logicalVisualOverflow);
}
inline void LegacyInlineFlowBox::addOutlineVisualOverflow(LayoutRect& logicalVisualOverflow)
{
const auto& lineStyle = this->lineStyle();
if (!lineStyle.hasOutlineInVisualOverflow())
return;
LayoutUnit outlineSize { lineStyle.outlineSize() };
LayoutUnit logicalTopVisualOverflow = std::min(LayoutUnit(logicalTop() - outlineSize), logicalVisualOverflow.y());
LayoutUnit logicalBottomVisualOverflow = std::max(LayoutUnit(logicalBottom() + outlineSize), logicalVisualOverflow.maxY());
LayoutUnit logicalLeftVisualOverflow = std::min(LayoutUnit(logicalLeft() - outlineSize), logicalVisualOverflow.x());
LayoutUnit logicalRightVisualOverflow = std::max(LayoutUnit(logicalRight() + outlineSize), logicalVisualOverflow.maxX());
logicalVisualOverflow = LayoutRect(logicalLeftVisualOverflow, logicalTopVisualOverflow,
logicalRightVisualOverflow - logicalLeftVisualOverflow, logicalBottomVisualOverflow - logicalTopVisualOverflow);
}
inline void LegacyInlineFlowBox::addReplacedChildOverflow(const LegacyInlineBox* inlineBox, LayoutRect& logicalLayoutOverflow, LayoutRect& logicalVisualOverflow)
{
const RenderBox& box = downcast<RenderBox>(inlineBox->renderer());
// Visual overflow only propagates if the box doesn't have a self-painting layer. This rectangle does not include
// transforms or relative positioning (since those objects always have self-painting layers), but it does need to be adjusted
// for writing-mode differences.
if (!box.hasSelfPaintingLayer()) {
LayoutRect childLogicalVisualOverflow = box.logicalVisualOverflowRectForPropagation(&renderer().style());
childLogicalVisualOverflow.move(inlineBox->logicalLeft(), inlineBox->logicalTop());
logicalVisualOverflow.unite(childLogicalVisualOverflow);
}
// Layout overflow internal to the child box only propagates if the child box doesn't have overflow clip set.
// Otherwise the child border box propagates as layout overflow. This rectangle must include transforms and relative positioning
// and be adjusted for writing-mode differences.
LayoutRect childLogicalLayoutOverflow = box.logicalLayoutOverflowRectForPropagation(&renderer().style());
childLogicalLayoutOverflow.move(inlineBox->logicalLeft(), inlineBox->logicalTop());
logicalLayoutOverflow.unite(childLogicalLayoutOverflow);
}
void LegacyInlineFlowBox::computeOverflow(LayoutUnit lineTop, LayoutUnit lineBottom, GlyphOverflowAndFallbackFontsMap& textBoxDataMap)
{
// If we know we have no overflow, we can just bail.
if (knownToHaveNoOverflow())
return;
if (m_overflow)
m_overflow = nullptr;
// Visual overflow just includes overflow for stuff we need to repaint ourselves. Self-painting layers are ignored.
// Layout overflow is used to determine scrolling extent, so it still includes child layers and also factors in
// transforms, relative positioning, etc.
LayoutRect logicalLayoutOverflow(enclosingLayoutRect(logicalFrameRectIncludingLineHeight(lineTop, lineBottom)));
LayoutRect logicalVisualOverflow(logicalLayoutOverflow);
addBoxShadowVisualOverflow(logicalVisualOverflow);
addOutlineVisualOverflow(logicalVisualOverflow);
addBorderOutsetVisualOverflow(logicalVisualOverflow);
for (auto* child = firstChild(); child; child = child->nextOnLine()) {
if (child->renderer().isOutOfFlowPositioned())
continue; // Positioned placeholders don't affect calculations.
if (is<RenderLineBreak>(child->renderer()))
continue;
if (is<RenderText>(child->renderer())) {
auto& textBox = downcast<LegacyInlineTextBox>(*child);
LayoutRect textBoxOverflow(enclosingLayoutRect(textBox.logicalFrameRect()));
addTextBoxVisualOverflow(textBox, textBoxDataMap, textBoxOverflow);
logicalVisualOverflow.unite(textBoxOverflow);
} else if (is<RenderInline>(child->renderer())) {
auto& flow = downcast<LegacyInlineFlowBox>(*child);
flow.computeOverflow(lineTop, lineBottom, textBoxDataMap);
if (!flow.renderer().hasSelfPaintingLayer())
logicalVisualOverflow.unite(flow.logicalVisualOverflowRect(lineTop, lineBottom));
LayoutRect childLayoutOverflow = flow.logicalLayoutOverflowRect(lineTop, lineBottom);
childLayoutOverflow.move(flow.renderer().relativePositionLogicalOffset());
logicalLayoutOverflow.unite(childLayoutOverflow);
} else
addReplacedChildOverflow(child, logicalLayoutOverflow, logicalVisualOverflow);
}
setOverflowFromLogicalRects(logicalLayoutOverflow, logicalVisualOverflow, lineTop, lineBottom);
}
void LegacyInlineFlowBox::setLayoutOverflow(const LayoutRect& rect, LayoutUnit lineTop, LayoutUnit lineBottom)
{
LayoutRect frameBox = enclosingLayoutRect(frameRectIncludingLineHeight(lineTop, lineBottom));
if (frameBox.contains(rect) || rect.isEmpty())
return;
if (!m_overflow)
m_overflow = adoptRef(new RenderOverflow(frameBox, frameBox));
m_overflow->setLayoutOverflow(rect);
}
void LegacyInlineFlowBox::setVisualOverflow(const LayoutRect& rect, LayoutUnit lineTop, LayoutUnit lineBottom)
{
LayoutRect frameBox = enclosingLayoutRect(frameRectIncludingLineHeight(lineTop, lineBottom));
if (frameBox.contains(rect) || rect.isEmpty())
return;
if (!m_overflow)
m_overflow = adoptRef(new RenderOverflow(frameBox, frameBox));
m_overflow->setVisualOverflow(rect);
}
void LegacyInlineFlowBox::setOverflowFromLogicalRects(const LayoutRect& logicalLayoutOverflow, const LayoutRect& logicalVisualOverflow, LayoutUnit lineTop, LayoutUnit lineBottom)
{
LayoutRect layoutOverflow(isHorizontal() ? logicalLayoutOverflow : logicalLayoutOverflow.transposedRect());
setLayoutOverflow(layoutOverflow, lineTop, lineBottom);
LayoutRect visualOverflow(isHorizontal() ? logicalVisualOverflow : logicalVisualOverflow.transposedRect());
setVisualOverflow(visualOverflow, lineTop, lineBottom);
}
bool LegacyInlineFlowBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom, HitTestAction hitTestAction)
{
if (hitTestAction != HitTestForeground)
return false;
LayoutRect overflowRect(visualOverflowRect(lineTop, lineBottom));
flipForWritingMode(overflowRect);
overflowRect.moveBy(accumulatedOffset);
if (!locationInContainer.intersects(overflowRect))
return false;
// Check children first.
for (auto* child = lastChild(); child; child = child->previousOnLine()) {
if (is<RenderText>(child->renderer()) || !child->boxModelObject()->hasSelfPaintingLayer()) {
if (child->nodeAtPoint(request, result, locationInContainer, accumulatedOffset, lineTop, lineBottom, hitTestAction)) {
renderer().updateHitTestResult(result, locationInContainer.point() - toLayoutSize(accumulatedOffset));
return true;
}
}
}
// Now check ourselves. Pixel snap hit testing.
if (!renderer().visibleToHitTesting(request))
return false;
// Do not hittest content beyond the ellipsis box.
if (isRootInlineBox() && hasEllipsisBox()) {
const LegacyEllipsisBox* ellipsisBox = root().ellipsisBox();
FloatRect boundsRect(frameRect());
if (isHorizontal())
renderer().style().isLeftToRightDirection() ? boundsRect.shiftXEdgeTo(ellipsisBox->right()) : boundsRect.setWidth(ellipsisBox->left() - left());
else
boundsRect.shiftYEdgeTo(ellipsisBox->right());
flipForWritingMode(boundsRect);
boundsRect.moveBy(accumulatedOffset);
// We are beyond the ellipsis box.
if (locationInContainer.intersects(boundsRect))
return false;
}
// Move x/y to our coordinates.
FloatRect rect(frameRect());
flipForWritingMode(rect);
rect.moveBy(accumulatedOffset);
if (locationInContainer.intersects(rect)) {
renderer().updateHitTestResult(result, flipForWritingMode(locationInContainer.point() - toLayoutSize(accumulatedOffset))); // Don't add in m_x or m_y here, we want coords in the containing block's space.
if (result.addNodeToListBasedTestResult(renderer().nodeForHitTest(), request, locationInContainer, rect) == HitTestProgress::Stop)
return true;
}
return false;
}
void LegacyInlineFlowBox::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom)
{
if (paintInfo.phase != PaintPhase::Foreground && paintInfo.phase != PaintPhase::Selection && paintInfo.phase != PaintPhase::Outline && paintInfo.phase != PaintPhase::SelfOutline && paintInfo.phase != PaintPhase::ChildOutlines && paintInfo.phase != PaintPhase::TextClip && paintInfo.phase != PaintPhase::Mask && paintInfo.phase != PaintPhase::EventRegion)
return;
LayoutRect overflowRect(visualOverflowRect(lineTop, lineBottom));
flipForWritingMode(overflowRect);
overflowRect.moveBy(paintOffset);
if (!paintInfo.rect.intersects(snappedIntRect(overflowRect)))
return;
if (paintInfo.phase != PaintPhase::ChildOutlines) {
InlineBoxPainter painter(*this, paintInfo, paintOffset);
painter.paint();
}
if (paintInfo.phase == PaintPhase::Mask)
return;
PaintPhase paintPhase = paintInfo.phase == PaintPhase::ChildOutlines ? PaintPhase::Outline : paintInfo.phase;
PaintInfo childInfo(paintInfo);
childInfo.phase = paintPhase;
childInfo.updateSubtreePaintRootForChildren(&renderer());
// Paint our children.
if (paintPhase != PaintPhase::SelfOutline) {
for (auto* curr = firstChild(); curr; curr = curr->nextOnLine()) {
if (curr->renderer().isText() || !curr->boxModelObject()->hasSelfPaintingLayer())
curr->paint(childInfo, paintOffset, lineTop, lineBottom);
}
}
}
LegacyInlineBox* LegacyInlineFlowBox::firstLeafDescendant() const
{
LegacyInlineBox* leaf = nullptr;
for (auto* child = firstChild(); child && !leaf; child = child->nextOnLine())
leaf = child->isLeaf() ? child : downcast<LegacyInlineFlowBox>(*child).firstLeafDescendant();
return leaf;
}
LegacyInlineBox* LegacyInlineFlowBox::lastLeafDescendant() const
{
LegacyInlineBox* leaf = nullptr;
for (auto* child = lastChild(); child && !leaf; child = child->previousOnLine())
leaf = child->isLeaf() ? child : downcast<LegacyInlineFlowBox>(*child).lastLeafDescendant();
return leaf;
}
RenderObject::HighlightState LegacyInlineFlowBox::selectionState() const
{
return RenderObject::HighlightState::None;
}
bool LegacyInlineFlowBox::canAccommodateEllipsis(bool ltr, int blockEdge, int ellipsisWidth) const
{
for (auto* box = firstChild(); box; box = box->nextOnLine()) {
if (!box->canAccommodateEllipsis(ltr, blockEdge, ellipsisWidth))
return false;
}
return true;
}
float LegacyInlineFlowBox::placeEllipsisBox(bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, float &truncatedWidth, bool& foundBox)
{
float result = -1;
// We iterate over all children, the foundBox variable tells us when we've found the
// box containing the ellipsis. All boxes after that one in the flow are hidden.
// If our flow is ltr then iterate over the boxes from left to right, otherwise iterate
// from right to left. Varying the order allows us to correctly hide the boxes following the ellipsis.
LegacyInlineBox* box = ltr ? firstChild() : lastChild();
// NOTE: these will cross after foundBox = true.
int visibleLeftEdge = blockLeftEdge;
int visibleRightEdge = blockRightEdge;
while (box) {
int currResult = box->placeEllipsisBox(ltr, visibleLeftEdge, visibleRightEdge, ellipsisWidth, truncatedWidth, foundBox);
if (currResult != -1 && result == -1)
result = currResult;
if (ltr) {
visibleLeftEdge += box->logicalWidth();
box = box->nextOnLine();
} else {
visibleRightEdge -= box->logicalWidth();
box = box->previousOnLine();
}
}
return result;
}
void LegacyInlineFlowBox::clearTruncation()
{
for (auto* box = firstChild(); box; box = box->nextOnLine())
box->clearTruncation();
}
LayoutUnit LegacyInlineFlowBox::computeOverAnnotationAdjustment(LayoutUnit allowedPosition) const
{
LayoutUnit result;
for (auto* child = firstChild(); child; child = child->nextOnLine()) {
if (child->renderer().isOutOfFlowPositioned())
continue; // Positioned placeholders don't affect calculations.
if (is<LegacyInlineFlowBox>(*child))
result = std::max(result, downcast<LegacyInlineFlowBox>(*child).computeOverAnnotationAdjustment(allowedPosition));
if (child->renderer().isReplacedOrInlineBlock() && is<RenderRubyRun>(child->renderer()) && child->renderer().style().rubyPosition() == RubyPosition::Before) {
auto& rubyRun = downcast<RenderRubyRun>(child->renderer());
RenderRubyText* rubyText = rubyRun.rubyText();
if (!rubyText)
continue;
if (!rubyRun.style().isFlippedLinesWritingMode()) {
LayoutUnit topOfFirstRubyTextLine = rubyText->logicalTop() + (rubyText->firstRootBox() ? rubyText->firstRootBox()->lineTop() : 0_lu);
if (topOfFirstRubyTextLine >= 0)
continue;
topOfFirstRubyTextLine += child->logicalTop();
result = std::max(result, allowedPosition - topOfFirstRubyTextLine);
} else {
LayoutUnit bottomOfLastRubyTextLine = rubyText->logicalTop() + (rubyText->lastRootBox() ? rubyText->lastRootBox()->lineBottom() : rubyText->logicalHeight());
if (bottomOfLastRubyTextLine <= child->logicalHeight())
continue;
bottomOfLastRubyTextLine += child->logicalTop();
result = std::max(result, bottomOfLastRubyTextLine - allowedPosition);
}
}
if (is<LegacyInlineTextBox>(*child)) {
const RenderStyle& childLineStyle = child->lineStyle();
std::optional<bool> markExistsAndIsAbove = downcast<LegacyInlineTextBox>(*child).emphasisMarkExistsAndIsAbove(childLineStyle);
if (markExistsAndIsAbove && *markExistsAndIsAbove) {
if (!childLineStyle.isFlippedLinesWritingMode()) {
int topOfEmphasisMark = child->logicalTop() - childLineStyle.fontCascade().emphasisMarkHeight(childLineStyle.textEmphasisMarkString());
result = std::max(result, allowedPosition - topOfEmphasisMark);
} else {
int bottomOfEmphasisMark = child->logicalBottom() + childLineStyle.fontCascade().emphasisMarkHeight(childLineStyle.textEmphasisMarkString());
result = std::max(result, bottomOfEmphasisMark - allowedPosition);
}
}
}
}
return result;
}
LayoutUnit LegacyInlineFlowBox::computeUnderAnnotationAdjustment(LayoutUnit allowedPosition) const
{
LayoutUnit result;
for (auto* child = firstChild(); child; child = child->nextOnLine()) {
if (child->renderer().isOutOfFlowPositioned())
continue; // Positioned placeholders don't affect calculations.
if (is<LegacyInlineFlowBox>(*child))
result = std::max(result, downcast<LegacyInlineFlowBox>(*child).computeUnderAnnotationAdjustment(allowedPosition));
if (child->renderer().isReplacedOrInlineBlock() && is<RenderRubyRun>(child->renderer()) && child->renderer().style().rubyPosition() == RubyPosition::After) {
auto& rubyRun = downcast<RenderRubyRun>(child->renderer());
RenderRubyText* rubyText = rubyRun.rubyText();
if (!rubyText)
continue;
if (rubyRun.style().isFlippedLinesWritingMode()) {
LayoutUnit topOfFirstRubyTextLine = rubyText->logicalTop() + (rubyText->firstRootBox() ? rubyText->firstRootBox()->lineTop() : 0_lu);
if (topOfFirstRubyTextLine >= 0)
continue;
topOfFirstRubyTextLine += child->logicalTop();
result = std::max(result, allowedPosition - topOfFirstRubyTextLine);
} else {
LayoutUnit bottomOfLastRubyTextLine = rubyText->logicalTop() + (rubyText->lastRootBox() ? rubyText->lastRootBox()->lineBottom() : rubyText->logicalHeight());
if (bottomOfLastRubyTextLine <= child->logicalHeight())
continue;
bottomOfLastRubyTextLine += child->logicalTop();
result = std::max(result, bottomOfLastRubyTextLine - allowedPosition);
}
}
if (is<LegacyInlineTextBox>(*child)) {
const RenderStyle& childLineStyle = child->lineStyle();
std::optional<bool> markExistsAndIsAbove = downcast<LegacyInlineTextBox>(*child).emphasisMarkExistsAndIsAbove(childLineStyle);
if (markExistsAndIsAbove && !*markExistsAndIsAbove) {
if (!childLineStyle.isFlippedLinesWritingMode()) {
LayoutUnit bottomOfEmphasisMark { child->logicalBottom() + childLineStyle.fontCascade().emphasisMarkHeight(childLineStyle.textEmphasisMarkString()) };
result = std::max(result, bottomOfEmphasisMark - allowedPosition);
} else {
LayoutUnit topOfEmphasisMark { child->logicalTop() - childLineStyle.fontCascade().emphasisMarkHeight(childLineStyle.textEmphasisMarkString()) };
result = std::max(result, allowedPosition - topOfEmphasisMark);
}
}
}
}
return result;
}
void LegacyInlineFlowBox::computeReplacedAndTextLineTopAndBottom(LayoutUnit& lineTop, LayoutUnit& lineBottom) const
{
for (const auto* box = firstChild(); box; box = box->nextOnLine()) {
if (is<LegacyInlineFlowBox>(*box))
downcast<LegacyInlineFlowBox>(*box).computeReplacedAndTextLineTopAndBottom(lineTop, lineBottom);
else {
if (box->logicalTop() < lineTop)
lineTop = box->logicalTop();
if (box->logicalBottom() > lineBottom)
lineBottom = box->logicalBottom();
}
}
}
#if ENABLE(TREE_DEBUGGING)
const char* LegacyInlineFlowBox::boxName() const
{
return "InlineFlowBox";
}
void LegacyInlineFlowBox::outputLineTreeAndMark(WTF::TextStream& stream, const LegacyInlineBox* markedBox, int depth) const
{
LegacyInlineBox::outputLineTreeAndMark(stream, markedBox, depth);
for (const LegacyInlineBox* box = firstChild(); box; box = box->nextOnLine())
box->outputLineTreeAndMark(stream, markedBox, depth + 1);
}
#endif
#ifndef NDEBUG
void LegacyInlineFlowBox::checkConsistency() const
{
assertNotDeleted();
ASSERT_WITH_SECURITY_IMPLICATION(!m_hasBadChildList);
#ifdef CHECK_CONSISTENCY
const LegacyInlineBox* previousChild = nullptr;
for (const LegacyInlineBox* child = firstChild(); child; child = child->nextOnLine()) {
ASSERT(child->parent() == this);
ASSERT(child->previousOnLine() == previousChild);
previousChild = child;
}
ASSERT(previousChild == m_lastChild);
#endif
}
#endif
} // namespace WebCore