| /* |
| * 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]; |
| }; |
| |
| COMPILE_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().isReplaced()) |
| shouldClearDescendantsHaveSameLineHeightAndBaseline = true; |
| else if (child->behavesLikeText()) { |
| if (child->renderer().isLineBreak() || child->renderer().parent() != &renderer()) { |
| if (!parentStyle.fontCascade().fontMetrics().hasIdenticalAscentDescentAndLineGap(childStyle.fontCascade().fontMetrics()) |
| || 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().fontMetrics().hasIdenticalAscentDescentAndLineGap(childStyle.fontCascade().fontMetrics()) |
| || 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().isReplaced()) { |
| 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(); |
| } |
| |
| 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. |
| |
| LegacyInlineFlowBox* inlineFlowBox = is<LegacyInlineFlowBox>(*child) ? downcast<LegacyInlineFlowBox>(child) : nullptr; |
| |
| 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; |
| } |
| |
| LegacyInlineFlowBox* inlineFlowBox = is<LegacyInlineFlowBox>(*child) ? downcast<LegacyInlineFlowBox>(child) : nullptr; |
| 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.fontMetrics(); |
| 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().fontMetrics().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 = TextBoxPainter::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().isReplaced() && 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().isReplaced() && 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 |
