/* * 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 "InlineFlowBox.h" #include "CachedImage.h" #include "CSSPropertyNames.h" #include "Document.h" #include "EllipsisBox.h" #include "GraphicsContext.h" #include "InlineTextBox.h" #include "HitTestResult.h" #include "RootInlineBox.h" #include "RenderBlock.h" #include "RenderInline.h" #include "RenderLayer.h" #include "RenderListMarker.h" #include "RenderRubyBase.h" #include "RenderRubyRun.h" #include "RenderRubyText.h" #include "RenderTableCell.h" #include "RootInlineBox.h" #include "Text.h" #include "VerticalPositionCache.h" #include using namespace std; namespace WebCore { #ifndef NDEBUG InlineFlowBox::~InlineFlowBox() { if (!m_hasBadChildList) for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) child->setHasBadParent(); } #endif int InlineFlowBox::getFlowSpacingLogicalWidth() { int totWidth = marginBorderPaddingLogicalLeft() + marginBorderPaddingLogicalRight(); for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { if (curr->isInlineFlowBox()) totWidth += static_cast(curr)->getFlowSpacingLogicalWidth(); } return totWidth; } void InlineFlowBox::addToLine(InlineBox* child) { ASSERT(!child->parent()); ASSERT(!child->nextOnLine()); ASSERT(!child->prevOnLine()); checkConsistency(); child->setParent(this); if (!m_firstChild) { m_firstChild = child; m_lastChild = child; } else { m_lastChild->setNextOnLine(child); child->setPrevOnLine(m_lastChild); m_lastChild = child; } child->setFirstLineStyleBit(m_firstLine); child->setIsHorizontal(isHorizontal()); if (child->isText()) m_hasTextChildren = true; checkConsistency(); } void InlineFlowBox::removeChild(InlineBox* child) { checkConsistency(); if (!m_dirty) dirtyLineBoxes(); root()->childRemoved(child); if (child == m_firstChild) m_firstChild = child->nextOnLine(); if (child == m_lastChild) m_lastChild = child->prevOnLine(); if (child->nextOnLine()) child->nextOnLine()->setPrevOnLine(child->prevOnLine()); if (child->prevOnLine()) child->prevOnLine()->setNextOnLine(child->nextOnLine()); child->setParent(0); checkConsistency(); } void InlineFlowBox::deleteLine(RenderArena* arena) { InlineBox* child = firstChild(); InlineBox* next = 0; while (child) { ASSERT(this == child->parent()); next = child->nextOnLine(); #ifndef NDEBUG child->setParent(0); #endif child->deleteLine(arena); child = next; } #ifndef NDEBUG m_firstChild = 0; m_lastChild = 0; #endif removeLineBoxFromRenderObject(); destroy(arena); } void InlineFlowBox::removeLineBoxFromRenderObject() { toRenderInline(renderer())->lineBoxes()->removeLineBox(this); } void InlineFlowBox::extractLine() { if (!m_extracted) extractLineBoxFromRenderObject(); for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) child->extractLine(); } void InlineFlowBox::extractLineBoxFromRenderObject() { toRenderInline(renderer())->lineBoxes()->extractLineBox(this); } void InlineFlowBox::attachLine() { if (m_extracted) attachLineBoxToRenderObject(); for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) child->attachLine(); } void InlineFlowBox::attachLineBoxToRenderObject() { toRenderInline(renderer())->lineBoxes()->attachLineBox(this); } void InlineFlowBox::adjustPosition(int dx, int dy) { InlineBox::adjustPosition(dx, dy); for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) child->adjustPosition(dx, dy); if (m_overflow) m_overflow->move(dx, dy); } RenderLineBoxList* InlineFlowBox::rendererLineBoxes() const { return toRenderInline(renderer())->lineBoxes(); } bool InlineFlowBox::onEndChain(RenderObject* endObject) { if (!endObject) return false; if (endObject == renderer()) return true; RenderObject* curr = endObject; RenderObject* parent = curr->parent(); while (parent && !parent->isRenderBlock()) { if (parent->lastChild() != curr || parent == renderer()) return false; curr = parent; parent = curr->parent(); } return true; } void InlineFlowBox::determineSpacingForFlowBoxes(bool lastLine, RenderObject* endObject) { // 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()) { 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). RenderLineBoxList* lineBoxList = rendererLineBoxes(); if (!lineBoxList->firstLineBox()->isConstructed() && !renderer()->isInlineElementContinuation()) { if (ltr && lineBoxList->firstLineBox() == this) includeLeftEdge = true; else if (!ltr && lineBoxList->lastLineBox() == this) includeRightEdge = true; } // In order to determine if the inline ends on this line, we check three things: // (1) If we are the last line and we don't have a continuation(), then we can // close up. // (2) If the last line box for the flow has an object following it on the line (ltr, // reverse for rtl), then the inline has closed. // (3) The line may end on the inline. If we are the last child (climbing up // the end object's chain), then we just closed as well. if (!lineBoxList->lastLineBox()->isConstructed()) { RenderInline* inlineFlow = toRenderInline(renderer()); if (ltr) { if (!nextLineBox() && ((lastLine && !inlineFlow->continuation()) || nextOnLineExists() || onEndChain(endObject))) includeRightEdge = true; } else { if ((!prevLineBox() || prevLineBox()->isConstructed()) && ((lastLine && !inlineFlow->continuation()) || prevOnLineExists() || onEndChain(endObject))) includeLeftEdge = true; } } } setEdges(includeLeftEdge, includeRightEdge); // Recur into our children. for (InlineBox* currChild = firstChild(); currChild; currChild = currChild->nextOnLine()) { if (currChild->isInlineFlowBox()) { InlineFlowBox* currFlow = static_cast(currChild); currFlow->determineSpacingForFlowBoxes(lastLine, endObject); } } } int InlineFlowBox::placeBoxesInInlineDirection(int logicalLeft, bool& needsWordSpacing, GlyphOverflowAndFallbackFontsMap& textBoxDataMap) { // Set our x position. setLogicalLeft(logicalLeft); int logicalLeftLayoutOverflow = logicalLeft; int logicalRightLayoutOverflow = logicalLeft; int logicalLeftVisualOverflow = logicalLeft; int logicalRightVisualOverflow = logicalLeft; int boxShadowLogicalLeft; int boxShadowLogicalRight; renderer()->style(m_firstLine)->getBoxShadowInlineDirectionExtent(boxShadowLogicalLeft, boxShadowLogicalRight); logicalLeftVisualOverflow = min(logicalLeft + boxShadowLogicalLeft, logicalLeftVisualOverflow); int startLogicalLeft = logicalLeft; logicalLeft += borderLogicalLeft() + paddingLogicalLeft(); for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { if (curr->renderer()->isText()) { InlineTextBox* text = static_cast(curr); RenderText* rt = toRenderText(text->renderer()); if (rt->textLength()) { if (needsWordSpacing && isSpaceOrNewline(rt->characters()[text->start()])) logicalLeft += rt->style(m_firstLine)->font().wordSpacing(); needsWordSpacing = !isSpaceOrNewline(rt->characters()[text->end()]); } text->setLogicalLeft(logicalLeft); int strokeOverflow = static_cast(ceilf(rt->style()->textStrokeWidth() / 2.0f)); // 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. int letterSpacing = min(0, (int)rt->style(m_firstLine)->font().letterSpacing()); logicalRightLayoutOverflow = max(logicalLeft + text->logicalWidth() - letterSpacing, logicalRightLayoutOverflow); GlyphOverflowAndFallbackFontsMap::iterator it = textBoxDataMap.find(static_cast(curr)); GlyphOverflow* glyphOverflow = it == textBoxDataMap.end() ? 0 : &it->second.second; int logicalLeftGlyphOverflow = -strokeOverflow - (glyphOverflow ? glyphOverflow->left : 0); int logicalRightGlyphOverflow = strokeOverflow - letterSpacing + (glyphOverflow ? glyphOverflow->right : 0); int childOverflowLogicalLeft = logicalLeftGlyphOverflow; int childOverflowLogicalRight = logicalRightGlyphOverflow; int textShadowLogicalLeft; int textShadowLogicalRight; rt->style(m_firstLine)->getTextShadowInlineDirectionExtent(textShadowLogicalLeft, textShadowLogicalRight); childOverflowLogicalLeft = min(childOverflowLogicalLeft, textShadowLogicalLeft + logicalLeftGlyphOverflow); childOverflowLogicalRight = max(childOverflowLogicalRight, textShadowLogicalRight + logicalRightGlyphOverflow); logicalLeftVisualOverflow = min(logicalLeft + childOverflowLogicalLeft, logicalLeftVisualOverflow); logicalRightVisualOverflow = max(logicalLeft + text->logicalWidth() + childOverflowLogicalRight, logicalRightVisualOverflow); logicalLeft += text->logicalWidth(); } else { if (curr->renderer()->isPositioned()) { if (curr->renderer()->parent()->style()->isLeftToRightDirection()) curr->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). curr->setLogicalLeft(root()->block()->logicalWidth() - logicalLeft); continue; // The positioned object has no effect on the width. } if (curr->renderer()->isRenderInline()) { InlineFlowBox* flow = static_cast(curr); logicalLeft += flow->marginLogicalLeft(); logicalLeft = flow->placeBoxesInInlineDirection(logicalLeft, needsWordSpacing, textBoxDataMap); logicalLeft += flow->marginLogicalRight(); logicalLeftLayoutOverflow = min(logicalLeftLayoutOverflow, flow->logicalLeftLayoutOverflow()); logicalRightLayoutOverflow = max(logicalRightLayoutOverflow, flow->logicalRightLayoutOverflow()); logicalLeftVisualOverflow = min(logicalLeftVisualOverflow, flow->logicalLeftVisualOverflow()); logicalRightVisualOverflow = max(logicalRightVisualOverflow, flow->logicalRightVisualOverflow()); } else if (!curr->renderer()->isListMarker() || toRenderListMarker(curr->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|. int logicalLeftMargin = isHorizontal() ? curr->boxModelObject()->marginLeft() : curr->boxModelObject()->marginTop(); int logicalRightMargin = isHorizontal() ? curr->boxModelObject()->marginRight() : curr->boxModelObject()->marginBottom(); logicalLeft += logicalLeftMargin; curr->setLogicalLeft(logicalLeft); RenderBox* box = toRenderBox(curr->renderer()); int childOverflowLogicalLeft = box->hasOverflowClip() ? 0 : (isHorizontal() ? box->leftLayoutOverflow() : box->topLayoutOverflow()); int childOverflowLogicalRight = box->hasOverflowClip() ? curr->logicalWidth() : (isHorizontal() ? box->rightLayoutOverflow() : box->bottomLayoutOverflow()); logicalLeftLayoutOverflow = min(logicalLeft + childOverflowLogicalLeft, logicalLeftLayoutOverflow); logicalRightLayoutOverflow = max(logicalLeft + childOverflowLogicalRight, logicalRightLayoutOverflow); logicalLeftVisualOverflow = min(logicalLeft + (isHorizontal() ? box->leftVisualOverflow() : box->topVisualOverflow()), logicalLeftVisualOverflow); logicalRightVisualOverflow = max(logicalLeft + (isHorizontal() ? box->rightVisualOverflow() : box->bottomVisualOverflow()), logicalRightVisualOverflow); logicalLeft += curr->logicalWidth() + logicalRightMargin; } } } logicalLeft += borderLogicalRight() + paddingLogicalRight(); setLogicalWidth(logicalLeft - startLogicalLeft); logicalRightVisualOverflow = max(logicalLeft + boxShadowLogicalRight, logicalRightVisualOverflow); logicalRightLayoutOverflow = max(logicalLeft, logicalRightLayoutOverflow); setInlineDirectionOverflowPositions(logicalLeftLayoutOverflow, logicalRightLayoutOverflow, logicalLeftVisualOverflow, logicalRightVisualOverflow); return logicalLeft; } bool InlineFlowBox::requiresIdeographicBaseline(const GlyphOverflowAndFallbackFontsMap& textBoxDataMap) const { if (isHorizontal()) return false; if (renderer()->style(m_firstLine)->font().primaryFont()->orientation() == Vertical) return true; for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { if (curr->renderer()->isPositioned()) continue; // Positioned placeholders don't affect calculations. if (curr->isInlineFlowBox()) { if (static_cast(curr)->requiresIdeographicBaseline(textBoxDataMap)) return true; } else { if (curr->renderer()->style(m_firstLine)->font().primaryFont()->orientation() == Vertical) return true; const Vector* usedFonts = 0; if (curr->isInlineTextBox()) { GlyphOverflowAndFallbackFontsMap::const_iterator it = textBoxDataMap.find(static_cast(curr)); usedFonts = it == textBoxDataMap.end() ? 0 : &it->second.first; } if (usedFonts) { for (size_t i = 0; i < usedFonts->size(); ++i) { if (usedFonts->at(i)->orientation() == Vertical) return true; } } } } return false; } void InlineFlowBox::adjustMaxAscentAndDescent(int& maxAscent, int& maxDescent, int maxPositionTop, int maxPositionBottom) { for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { // The computed lineheight needs to be extended for the // positioned elements if (curr->renderer()->isPositioned()) continue; // Positioned placeholders don't affect calculations. if (curr->logicalTop() == PositionTop || curr->logicalTop() == PositionBottom) { int lineHeight = curr->lineHeight(); if (curr->logicalTop() == PositionTop) { if (maxAscent + maxDescent < lineHeight) maxDescent = lineHeight - maxAscent; } else { if (maxAscent + maxDescent < lineHeight) maxAscent = lineHeight - maxDescent; } if (maxAscent + maxDescent >= max(maxPositionTop, maxPositionBottom)) break; } if (curr->isInlineFlowBox()) static_cast(curr)->adjustMaxAscentAndDescent(maxAscent, maxDescent, maxPositionTop, maxPositionBottom); } } static int verticalPositionForBox(InlineBox* box, FontBaseline baselineType, bool firstLine, VerticalPositionCache& verticalPositionCache) { if (box->renderer()->isText()) return box->parent()->logicalTop(); RenderBoxModelObject* renderer = box->boxModelObject(); ASSERT(renderer->isInline()); if (!renderer->isInline()) return 0; // This method determines the vertical position for inline elements. if (firstLine && !renderer->document()->usesFirstLineRules()) firstLine = false; // Check the cache. bool isRenderInline = renderer->isRenderInline(); if (isRenderInline && !firstLine) { int verticalPosition = verticalPositionCache.get(renderer, baselineType); if (verticalPosition != PositionUndefined) return verticalPosition; } int verticalPosition = 0; EVerticalAlign verticalAlign = renderer->style()->verticalAlign(); if (verticalAlign == TOP) verticalPosition = PositionTop; else if (verticalAlign == BOTTOM) verticalPosition = PositionBottom; else { RenderObject* parent = renderer->parent(); if (parent->isRenderInline() && parent->style()->verticalAlign() != TOP && parent->style()->verticalAlign() != BOTTOM) verticalPosition = box->parent()->logicalTop(); if (verticalAlign != BASELINE) { const Font& font = parent->style(firstLine)->font(); int fontSize = font.pixelSize(); LineDirectionMode lineDirection = parent->style()->isHorizontalWritingMode() ? HorizontalLine : VerticalLine; if (verticalAlign == SUB) verticalPosition += fontSize / 5 + 1; else if (verticalAlign == SUPER) verticalPosition -= fontSize / 3 + 1; else if (verticalAlign == TEXT_TOP) verticalPosition += renderer->baselinePosition(baselineType, firstLine, lineDirection) - font.ascent(baselineType); else if (verticalAlign == MIDDLE) verticalPosition += -static_cast(font.xHeight() / 2) - renderer->lineHeight(firstLine, lineDirection) / 2 + renderer->baselinePosition(baselineType, firstLine, lineDirection); else if (verticalAlign == TEXT_BOTTOM) { verticalPosition += font.descent(baselineType); // lineHeight - baselinePosition is always 0 for replaced elements (except inline blocks), so don't bother wasting time in that case. if (!renderer->isReplaced() || renderer->isInlineBlockOrInlineTable()) verticalPosition -= (renderer->lineHeight(firstLine, lineDirection) - renderer->baselinePosition(baselineType, firstLine, lineDirection)); } else if (verticalAlign == BASELINE_MIDDLE) verticalPosition += -renderer->lineHeight(firstLine, lineDirection) / 2 + renderer->baselinePosition(baselineType, firstLine, lineDirection); else if (verticalAlign == LENGTH) verticalPosition -= renderer->style()->verticalAlignLength().calcValue(renderer->lineHeight(firstLine, lineDirection)); } } // Store the cached value. if (isRenderInline && !firstLine) verticalPositionCache.set(renderer, baselineType, verticalPosition); return verticalPosition; } void InlineFlowBox::computeLogicalBoxHeights(int& maxPositionTop, int& maxPositionBottom, int& maxAscent, int& 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. // // The maxAscent value represents the distance of the highest point of any box (including line-height) from // the root box's baseline. The maxDescent value represents the distance of the lowest point of any box // (also 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 very 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. if (isRootInlineBox()) { // Examine our root box. int height = lineHeight(); int baseline = baselinePosition(baselineType); if (hasTextChildren() || strictMode) { int ascent = baseline; int descent = height - ascent; if (maxAscent < ascent || !setMaxAscent) { maxAscent = ascent; setMaxAscent = true; } if (maxDescent < descent || !setMaxDescent) { maxDescent = descent; setMaxDescent = true; } } } for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { if (curr->renderer()->isPositioned()) continue; // Positioned placeholders don't affect calculations. bool isInlineFlow = curr->isInlineFlowBox(); // 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 line-height) is above (for ascent) or below (for descent) the root box's baseline. 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. curr->setLogicalTop(verticalPositionForBox(curr, baselineType, m_firstLine, verticalPositionCache)); int lineHeight; int baseline; Vector* usedFonts = 0; if (curr->isInlineTextBox()) { GlyphOverflowAndFallbackFontsMap::iterator it = textBoxDataMap.find(static_cast(curr)); usedFonts = it == textBoxDataMap.end() ? 0 : &it->second.first; } if (usedFonts && curr->renderer()->style(m_firstLine)->lineHeight().isNegative()) { usedFonts->append(curr->renderer()->style(m_firstLine)->font().primaryFont()); Length parentLineHeight = curr->renderer()->parent()->style()->lineHeight(); bool baselineSet = false; baseline = 0; int baselineToBottom = 0; for (size_t i = 0; i < usedFonts->size(); ++i) { int halfLeading = (usedFonts->at(i)->lineSpacing() - usedFonts->at(i)->height()) / 2; int usedFontAscent = halfLeading + usedFonts->at(i)->ascent(baselineType); int usedFontDescent = usedFonts->at(i)->lineSpacing() - usedFontAscent; if (!baselineSet) { baselineSet = true; baseline = usedFontAscent; baselineToBottom = usedFontDescent; } else { baseline = max(baseline, usedFontAscent); baselineToBottom = max(baselineToBottom, usedFontDescent); } } lineHeight = baseline + baselineToBottom; } else { lineHeight = curr->lineHeight(); baseline = curr->baselinePosition(baselineType); if (curr->isText() || isInlineFlow) { // Examine the font box for inline flows and text boxes to see if any part of it is above the baseline. // If the top of our font box relative to the root box baseline is above the root box baseline, then // we are contributing to the maxAscent value. affectsAscent = curr->renderer()->style(m_firstLine)->font().ascent(baselineType) - curr->logicalTop() > 0; // Descent is similar. If any part of our font box is below the root box's baseline, then // we contribute to the maxDescent value. affectsDescent = curr->renderer()->style(m_firstLine)->font().descent(baselineType) + curr->logicalTop() > 0; } else { // Replaced elements always affect both the ascent and descent. affectsAscent = true; affectsDescent = true; } } if (curr->logicalTop() == PositionTop) { if (maxPositionTop < lineHeight) maxPositionTop = lineHeight; } else if (curr->logicalTop() == PositionBottom) { if (maxPositionBottom < lineHeight) maxPositionBottom = lineHeight; } else if ((!isInlineFlow || static_cast(curr)->hasTextChildren()) || curr->boxModelObject()->hasInlineDirectionBordersOrPadding() || strictMode) { // 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. int ascent = baseline - curr->logicalTop(); int descent = lineHeight - ascent; if (affectsAscent && (maxAscent < ascent || !setMaxAscent)) { maxAscent = ascent; setMaxAscent = true; } if (affectsDescent && (maxDescent < descent || !setMaxDescent)) { maxDescent = descent; setMaxDescent = true; } } if (curr->isInlineFlowBox()) static_cast(curr)->computeLogicalBoxHeights(maxPositionTop, maxPositionBottom, maxAscent, maxDescent, setMaxAscent, setMaxDescent, strictMode, textBoxDataMap, baselineType, verticalPositionCache); } } void InlineFlowBox::placeBoxesInBlockDirection(int top, int maxHeight, int maxAscent, bool strictMode, int& lineTop, int& lineBottom, bool& setLineTop, int& lineTopIncludingMargins, int& lineBottomIncludingMargins, bool& containsRuby, FontBaseline baselineType) { if (isRootInlineBox()) setLogicalTop(top + maxAscent - baselinePosition(baselineType)); // Place our root box. for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { if (curr->renderer()->isPositioned()) continue; // Positioned placeholders don't affect calculations. // Adjust boxes to use their real box y/height and not the logical height (as dictated by // line-height). bool isInlineFlow = curr->isInlineFlowBox(); if (isInlineFlow) static_cast(curr)->placeBoxesInBlockDirection(top, maxHeight, maxAscent, strictMode, lineTop, lineBottom, setLineTop, lineTopIncludingMargins, lineBottomIncludingMargins, containsRuby, baselineType); bool childAffectsTopBottomPos = true; if (curr->logicalTop() == PositionTop) curr->setLogicalTop(top); else if (curr->logicalTop() == PositionBottom) curr->setLogicalTop(top + maxHeight - curr->lineHeight()); else { if ((isInlineFlow && !static_cast(curr)->hasTextChildren()) && !curr->boxModelObject()->hasInlineDirectionBordersOrPadding() && !strictMode) childAffectsTopBottomPos = false; int posAdjust = maxAscent - curr->baselinePosition(baselineType); curr->setLogicalTop(curr->logicalTop() + top + posAdjust); } int newLogicalTop = curr->logicalTop(); int newLogicalTopIncludingMargins; int boxHeight = curr->logicalHeight(); int boxHeightIncludingMargins = boxHeight; if (curr->isText() || curr->isInlineFlowBox()) { const Font& font = curr->renderer()->style(m_firstLine)->font(); newLogicalTop += curr->baselinePosition(baselineType) - font.ascent(baselineType); if (curr->isInlineFlowBox()) { RenderBoxModelObject* boxObject = toRenderBoxModelObject(curr->renderer()); newLogicalTop -= boxObject->style(m_firstLine)->isHorizontalWritingMode() ? boxObject->borderTop() + boxObject->paddingTop() : boxObject->borderRight() + boxObject->paddingRight(); } newLogicalTopIncludingMargins = newLogicalTop; } else if (!curr->renderer()->isBR()) { RenderBox* box = toRenderBox(curr->renderer()); newLogicalTopIncludingMargins = newLogicalTop; int overSideMargin = curr->isHorizontal() ? box->marginTop() : box->marginRight(); int underSideMargin = curr->isHorizontal() ? box->marginBottom() : box->marginLeft(); newLogicalTop += overSideMargin; boxHeightIncludingMargins += overSideMargin + underSideMargin; } curr->setLogicalTop(newLogicalTop); if (childAffectsTopBottomPos) { if (curr->renderer()->isRubyRun()) { // 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. containsRuby = true; RenderRubyRun* rubyRun = static_cast(curr->renderer()); if (RenderRubyBase* rubyBase = rubyRun->rubyBase()) { int bottomRubyBaseLeading = (curr->logicalHeight() - rubyBase->logicalBottom()) + rubyBase->logicalHeight() - (rubyBase->lastRootBox() ? rubyBase->lastRootBox()->lineBottom() : 0); int topRubyBaseLeading = rubyBase->logicalTop() + (rubyBase->firstRootBox() ? rubyBase->firstRootBox()->lineTop() : 0); newLogicalTop += !renderer()->style()->isFlippedLinesWritingMode() ? topRubyBaseLeading : bottomRubyBaseLeading; boxHeight -= (topRubyBaseLeading + bottomRubyBaseLeading); } } if (!setLineTop) { setLineTop = true; lineTop = newLogicalTop; lineTopIncludingMargins = min(lineTop, newLogicalTopIncludingMargins); } else { lineTop = min(lineTop, newLogicalTop); lineTopIncludingMargins = min(lineTop, min(lineTopIncludingMargins, newLogicalTopIncludingMargins)); } lineBottom = max(lineBottom, newLogicalTop + boxHeight); lineBottomIncludingMargins = max(lineBottom, max(lineBottomIncludingMargins, newLogicalTopIncludingMargins + boxHeightIncludingMargins)); } } if (isRootInlineBox()) { const Font& font = renderer()->style(m_firstLine)->font(); setLogicalTop(logicalTop() + baselinePosition(baselineType) - font.ascent(baselineType)); if (hasTextChildren() || strictMode) { if (!setLineTop) { setLineTop = true; lineTop = logicalTop(); lineTopIncludingMargins = lineTop; } else { lineTop = min(lineTop, logicalTop()); lineTopIncludingMargins = min(lineTop, lineTopIncludingMargins); } lineBottom = max(lineBottom, logicalTop() + logicalHeight()); lineBottomIncludingMargins = max(lineBottom, lineBottomIncludingMargins); } if (renderer()->style()->isFlippedLinesWritingMode()) flipLinesInBlockDirection(lineTopIncludingMargins, lineBottomIncludingMargins); } } void InlineFlowBox::flipLinesInBlockDirection(int lineTop, int 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 (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { if (curr->renderer()->isPositioned()) continue; // Positioned placeholders aren't affected here. if (curr->isInlineFlowBox()) static_cast(curr)->flipLinesInBlockDirection(lineTop, lineBottom); else curr->setLogicalTop(lineBottom - (curr->logicalTop() - lineTop) - curr->logicalHeight()); } } void InlineFlowBox::computeBlockDirectionOverflow(int lineTop, int lineBottom, bool strictMode, GlyphOverflowAndFallbackFontsMap& textBoxDataMap) { bool isFlippedLine = renderer()->style(m_firstLine)->isFlippedLinesWritingMode(); int boxHeight = logicalHeight(); // Any spillage outside of the line top and bottom is not considered overflow. We just ignore this, since it only happens // from the "your ascent/descent don't affect the line" quirk. int topOverflow = max(logicalTop(), lineTop); int bottomOverflow = min(logicalTop() + boxHeight, lineBottom); int topLayoutOverflow = topOverflow; int bottomLayoutOverflow = bottomOverflow; int topVisualOverflow = topOverflow; int bottomVisualOverflow = bottomOverflow; // box-shadow on root line boxes is applying to the block and not to the lines. if (parent()) { int boxShadowTop; int boxShadowBottom; renderer()->style(m_firstLine)->getBoxShadowBlockDirectionExtent(boxShadowTop, boxShadowBottom); topVisualOverflow = min(logicalTop() + boxShadowTop, topVisualOverflow); bottomVisualOverflow = max(logicalTop() + boxHeight + boxShadowBottom, bottomVisualOverflow); } for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { if (curr->renderer()->isPositioned()) continue; // Positioned placeholders don't affect calculations. if (curr->renderer()->isText()) { InlineTextBox* text = static_cast(curr); RenderText* rt = toRenderText(text->renderer()); if (rt->isBR()) continue; int strokeOverflow = static_cast(ceilf(rt->style()->textStrokeWidth() / 2.0f)); GlyphOverflowAndFallbackFontsMap::iterator it = textBoxDataMap.find(static_cast(curr)); GlyphOverflow* glyphOverflow = it == textBoxDataMap.end() ? 0 : &it->second.second; int topGlyphEdge = glyphOverflow ? (isFlippedLine ? glyphOverflow->bottom : glyphOverflow->top) : 0; int bottomGlyphEdge = glyphOverflow ? (isFlippedLine ? glyphOverflow->top : glyphOverflow->bottom) : 0; int topGlyphOverflow = -strokeOverflow - topGlyphEdge; int bottomGlyphOverflow = strokeOverflow + bottomGlyphEdge; int textShadowTop; int textShadowBottom; curr->renderer()->style(m_firstLine)->getTextShadowBlockDirectionExtent(textShadowTop, textShadowBottom); int childOverflowTop = min(textShadowTop + topGlyphOverflow, topGlyphOverflow); int childOverflowBottom = max(textShadowBottom + bottomGlyphOverflow, bottomGlyphOverflow); topVisualOverflow = min(curr->logicalTop() + childOverflowTop, topVisualOverflow); bottomVisualOverflow = max(curr->logicalTop() + text->logicalHeight() + childOverflowBottom, bottomVisualOverflow); } else if (curr->renderer()->isRenderInline()) { InlineFlowBox* flow = static_cast(curr); flow->computeBlockDirectionOverflow(lineTop, lineBottom, strictMode, textBoxDataMap); topLayoutOverflow = min(topLayoutOverflow, flow->logicalTopLayoutOverflow()); bottomLayoutOverflow = max(bottomLayoutOverflow, flow->logicalBottomLayoutOverflow()); topVisualOverflow = min(topVisualOverflow, flow->logicalTopVisualOverflow()); bottomVisualOverflow = max(bottomVisualOverflow, flow->logicalBottomVisualOverflow()); } else if (!curr->boxModelObject()->hasSelfPaintingLayer()){ // Only include overflow from replaced inlines if they do not paint themselves. int boxLogicalTop = curr->logicalTop(); int childTopLayoutOverflow; int childBottomLayoutOverflow; int childTopVisualOverflow; int childBottomVisualOverflow; RenderBox* box = toRenderBox(curr->renderer()); box->blockDirectionOverflow(isHorizontal(), childTopLayoutOverflow, childBottomLayoutOverflow, childTopVisualOverflow, childBottomVisualOverflow); if (box->hasOverflowClip()) { childTopLayoutOverflow = 0; childBottomLayoutOverflow = curr->logicalHeight(); } topLayoutOverflow = min(boxLogicalTop + childTopLayoutOverflow, topLayoutOverflow); bottomLayoutOverflow = max(boxLogicalTop + childBottomLayoutOverflow, bottomLayoutOverflow); topVisualOverflow = min(boxLogicalTop + childTopVisualOverflow, topVisualOverflow); bottomVisualOverflow = max(boxLogicalTop + childBottomVisualOverflow, bottomVisualOverflow); } } setBlockDirectionOverflowPositions(topLayoutOverflow, bottomLayoutOverflow, topVisualOverflow, bottomVisualOverflow); } bool InlineFlowBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty) { IntRect overflowRect(visibleOverflowRect()); flipForWritingMode(overflowRect); overflowRect.move(tx, ty); if (!overflowRect.intersects(result.rectForPoint(x, y))) return false; // Check children first. for (InlineBox* curr = lastChild(); curr; curr = curr->prevOnLine()) { if ((curr->renderer()->isText() || !curr->boxModelObject()->hasSelfPaintingLayer()) && curr->nodeAtPoint(request, result, x, y, tx, ty)) { renderer()->updateHitTestResult(result, IntPoint(x - tx, y - ty)); return true; } } // Now check ourselves. IntPoint boxOrigin = locationIncludingFlipping(); boxOrigin.move(tx, ty); IntRect rect(boxOrigin, IntSize(width(), height())); if (visibleToHitTesting() && rect.intersects(result.rectForPoint(x, y))) { renderer()->updateHitTestResult(result, flipForWritingMode(IntPoint(x - tx, y - ty))); // Don't add in m_x or m_y here, we want coords in the containing block's space. if (!result.addNodeToRectBasedTestResult(renderer()->node(), x, y, rect)) return true; } return false; } void InlineFlowBox::paint(PaintInfo& paintInfo, int tx, int ty) { IntRect overflowRect(visibleOverflowRect()); overflowRect.inflate(renderer()->maximalOutlineSize(paintInfo.phase)); flipForWritingMode(overflowRect); overflowRect.move(tx, ty); if (!paintInfo.rect.intersects(overflowRect)) return; if (paintInfo.phase != PaintPhaseChildOutlines) { if (paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) { // Add ourselves to the paint info struct's list of inlines that need to paint their // outlines. if (renderer()->style()->visibility() == VISIBLE && renderer()->hasOutline() && !isRootInlineBox()) { RenderInline* inlineFlow = toRenderInline(renderer()); RenderBlock* cb = 0; bool containingBlockPaintsContinuationOutline = inlineFlow->continuation() || inlineFlow->isInlineElementContinuation(); if (containingBlockPaintsContinuationOutline) { cb = renderer()->containingBlock()->containingBlock(); for (RenderBoxModelObject* box = boxModelObject(); box != cb; box = box->parent()->enclosingBoxModelObject()) { if (box->hasSelfPaintingLayer()) { containingBlockPaintsContinuationOutline = false; break; } } } if (containingBlockPaintsContinuationOutline) { // Add ourselves to the containing block of the entire continuation so that it can // paint us atomically. cb->addContinuationWithOutline(toRenderInline(renderer()->node()->renderer())); } else if (!inlineFlow->isInlineElementContinuation()) paintInfo.outlineObjects->add(inlineFlow); } } else if (paintInfo.phase == PaintPhaseMask) { paintMask(paintInfo, tx, ty); return; } else { // Paint our background, border and box-shadow. paintBoxDecorations(paintInfo, tx, ty); } } if (paintInfo.phase == PaintPhaseMask) return; PaintPhase paintPhase = paintInfo.phase == PaintPhaseChildOutlines ? PaintPhaseOutline : paintInfo.phase; PaintInfo childInfo(paintInfo); childInfo.phase = paintPhase; childInfo.updatePaintingRootForChildren(renderer()); // Paint our children. if (paintPhase != PaintPhaseSelfOutline) { for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { if (curr->renderer()->isText() || !curr->boxModelObject()->hasSelfPaintingLayer()) curr->paint(childInfo, tx, ty); } } } void InlineFlowBox::paintFillLayers(const PaintInfo& paintInfo, const Color& c, const FillLayer* fillLayer, int _tx, int _ty, int w, int h, CompositeOperator op) { if (!fillLayer) return; paintFillLayers(paintInfo, c, fillLayer->next(), _tx, _ty, w, h, op); paintFillLayer(paintInfo, c, fillLayer, _tx, _ty, w, h, op); } void InlineFlowBox::paintFillLayer(const PaintInfo& paintInfo, const Color& c, const FillLayer* fillLayer, int tx, int ty, int w, int h, CompositeOperator op) { StyleImage* img = fillLayer->image(); bool hasFillImage = img && img->canRender(renderer()->style()->effectiveZoom()); if ((!hasFillImage && !renderer()->style()->hasBorderRadius()) || (!prevLineBox() && !nextLineBox()) || !parent()) boxModelObject()->paintFillLayerExtended(paintInfo, c, fillLayer, tx, ty, w, h, this, op); else { // We have a fill image that spans multiple lines. // We need to adjust tx and ty by the width of all previous lines. // Think of background painting on inlines as though you had one long line, a single continuous // strip. Even though that strip has been broken up across multiple lines, you still paint it // as though you had one single line. This means each line has to pick up the background where // the previous line left off. // FIXME: What the heck do we do with RTL here? The math we're using is obviously not right, // but it isn't even clear how this should work at all. int logicalOffsetOnLine = 0; for (InlineFlowBox* curr = prevLineBox(); curr; curr = curr->prevLineBox()) logicalOffsetOnLine += curr->logicalWidth(); int totalLogicalWidth = logicalOffsetOnLine; for (InlineFlowBox* curr = this; curr; curr = curr->nextLineBox()) totalLogicalWidth += curr->logicalWidth(); int stripX = tx - (isHorizontal() ? logicalOffsetOnLine : 0); int stripY = ty - (isHorizontal() ? 0 : logicalOffsetOnLine); int stripWidth = isHorizontal() ? totalLogicalWidth : width(); int stripHeight = isHorizontal() ? height() : totalLogicalWidth; paintInfo.context->save(); paintInfo.context->clip(IntRect(tx, ty, width(), height())); boxModelObject()->paintFillLayerExtended(paintInfo, c, fillLayer, stripX, stripY, stripWidth, stripHeight, this, op); paintInfo.context->restore(); } } void InlineFlowBox::paintBoxShadow(GraphicsContext* context, RenderStyle* s, ShadowStyle shadowStyle, int tx, int ty, int w, int h) { if ((!prevLineBox() && !nextLineBox()) || !parent()) boxModelObject()->paintBoxShadow(context, tx, ty, w, h, s, shadowStyle); else { // FIXME: We can do better here in the multi-line case. We want to push a clip so that the shadow doesn't // protrude incorrectly at the edges, and we want to possibly include shadows cast from the previous/following lines boxModelObject()->paintBoxShadow(context, tx, ty, w, h, s, shadowStyle, includeLogicalLeftEdge(), includeLogicalRightEdge()); } } void InlineFlowBox::paintBoxDecorations(PaintInfo& paintInfo, int tx, int ty) { if (!paintInfo.shouldPaintWithinRoot(renderer()) || renderer()->style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseForeground) return; int x = m_x; int y = m_y; int w = width(); int h = height(); // Constrain our background/border painting to the line top and bottom if necessary. bool noQuirksMode = renderer()->document()->inNoQuirksMode(); if (!hasTextChildren() && !noQuirksMode) { RootInlineBox* rootBox = root(); int& top = isHorizontal() ? y : x; int& logicalHeight = isHorizontal() ? h : w; int bottom = min(rootBox->lineBottom(), top + logicalHeight); top = max(rootBox->lineTop(), top); logicalHeight = bottom - top; } // Move x/y to our coordinates. IntRect localRect(x, y, w, h); flipForWritingMode(localRect); tx += localRect.x(); ty += localRect.y(); GraphicsContext* context = paintInfo.context; // You can use p::first-line to specify a background. If so, the root line boxes for // a line may actually have to paint a background. RenderStyle* styleToUse = renderer()->style(m_firstLine); if ((!parent() && m_firstLine && styleToUse != renderer()->style()) || (parent() && renderer()->hasBoxDecorations())) { // Shadow comes first and is behind the background and border. if (styleToUse->boxShadow()) paintBoxShadow(context, styleToUse, Normal, tx, ty, w, h); Color c = styleToUse->visitedDependentColor(CSSPropertyBackgroundColor); paintFillLayers(paintInfo, c, styleToUse->backgroundLayers(), tx, ty, w, h); if (styleToUse->boxShadow()) paintBoxShadow(context, styleToUse, Inset, tx, ty, w, h); // :first-line cannot be used to put borders on a line. Always paint borders with our // non-first-line style. if (parent() && renderer()->style()->hasBorder()) { StyleImage* borderImage = renderer()->style()->borderImage().image(); bool hasBorderImage = borderImage && borderImage->canRender(styleToUse->effectiveZoom()); if (hasBorderImage && !borderImage->isLoaded()) return; // Don't paint anything while we wait for the image to load. // The simple case is where we either have no border image or we are the only box for this object. In those // cases only a single call to draw is required. if (!hasBorderImage || (!prevLineBox() && !nextLineBox())) boxModelObject()->paintBorder(context, tx, ty, w, h, renderer()->style(), includeLogicalLeftEdge(), includeLogicalRightEdge()); else { // We have a border image that spans multiple lines. // We need to adjust tx and ty by the width of all previous lines. // Think of border image painting on inlines as though you had one long line, a single continuous // strip. Even though that strip has been broken up across multiple lines, you still paint it // as though you had one single line. This means each line has to pick up the image where // the previous line left off. // FIXME: What the heck do we do with RTL here? The math we're using is obviously not right, // but it isn't even clear how this should work at all. int logicalOffsetOnLine = 0; for (InlineFlowBox* curr = prevLineBox(); curr; curr = curr->prevLineBox()) logicalOffsetOnLine += curr->logicalWidth(); int totalLogicalWidth = logicalOffsetOnLine; for (InlineFlowBox* curr = this; curr; curr = curr->nextLineBox()) totalLogicalWidth += curr->logicalWidth(); int stripX = tx - (isHorizontal() ? logicalOffsetOnLine : 0); int stripY = ty - (isHorizontal() ? 0 : logicalOffsetOnLine); int stripWidth = isHorizontal() ? totalLogicalWidth : w; int stripHeight = isHorizontal() ? h : totalLogicalWidth; context->save(); context->clip(IntRect(tx, ty, w, h)); boxModelObject()->paintBorder(context, stripX, stripY, stripWidth, stripHeight, renderer()->style()); context->restore(); } } } } void InlineFlowBox::paintMask(PaintInfo& paintInfo, int tx, int ty) { if (!paintInfo.shouldPaintWithinRoot(renderer()) || renderer()->style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseMask) return; int x = m_x; int y = m_y; int w = width(); int h = height(); // Constrain our background/border painting to the line top and bottom if necessary. bool noQuirksMode = renderer()->document()->inNoQuirksMode(); if (!hasTextChildren() && !noQuirksMode) { RootInlineBox* rootBox = root(); int& top = isHorizontal() ? y : x; int& logicalHeight = isHorizontal() ? h : w; int bottom = min(rootBox->lineBottom(), top + logicalHeight); top = max(rootBox->lineTop(), top); logicalHeight = bottom - top; } // Move x/y to our coordinates. IntRect localRect(x, y, w, h); flipForWritingMode(localRect); tx += localRect.x(); ty += localRect.y(); const NinePieceImage& maskNinePieceImage = renderer()->style()->maskBoxImage(); StyleImage* maskBoxImage = renderer()->style()->maskBoxImage().image(); // Figure out if we need to push a transparency layer to render our mask. bool pushTransparencyLayer = false; bool compositedMask = renderer()->hasLayer() && boxModelObject()->layer()->hasCompositedMask(); CompositeOperator compositeOp = CompositeSourceOver; if (!compositedMask) { if ((maskBoxImage && renderer()->style()->maskLayers()->hasImage()) || renderer()->style()->maskLayers()->next()) pushTransparencyLayer = true; compositeOp = CompositeDestinationIn; if (pushTransparencyLayer) { paintInfo.context->setCompositeOperation(CompositeDestinationIn); paintInfo.context->beginTransparencyLayer(1.0f); compositeOp = CompositeSourceOver; } } paintFillLayers(paintInfo, Color(), renderer()->style()->maskLayers(), tx, ty, w, h, compositeOp); bool hasBoxImage = maskBoxImage && maskBoxImage->canRender(renderer()->style()->effectiveZoom()); if (!hasBoxImage || !maskBoxImage->isLoaded()) return; // Don't paint anything while we wait for the image to load. // The simple case is where we are the only box for this object. In those // cases only a single call to draw is required. if (!prevLineBox() && !nextLineBox()) { boxModelObject()->paintNinePieceImage(paintInfo.context, tx, ty, w, h, renderer()->style(), maskNinePieceImage, compositeOp); } else { // We have a mask image that spans multiple lines. // We need to adjust _tx and _ty by the width of all previous lines. int logicalOffsetOnLine = 0; for (InlineFlowBox* curr = prevLineBox(); curr; curr = curr->prevLineBox()) logicalOffsetOnLine += curr->logicalWidth(); int totalLogicalWidth = logicalOffsetOnLine; for (InlineFlowBox* curr = this; curr; curr = curr->nextLineBox()) totalLogicalWidth += curr->logicalWidth(); int stripX = tx - (isHorizontal() ? logicalOffsetOnLine : 0); int stripY = ty - (isHorizontal() ? 0 : logicalOffsetOnLine); int stripWidth = isHorizontal() ? totalLogicalWidth : w; int stripHeight = isHorizontal() ? h : totalLogicalWidth; paintInfo.context->save(); paintInfo.context->clip(IntRect(tx, ty, w, h)); boxModelObject()->paintNinePieceImage(paintInfo.context, stripX, stripY, stripWidth, stripHeight, renderer()->style(), maskNinePieceImage, compositeOp); paintInfo.context->restore(); } if (pushTransparencyLayer) paintInfo.context->endTransparencyLayer(); } InlineBox* InlineFlowBox::firstLeafChild() const { InlineBox* leaf = 0; for (InlineBox* child = firstChild(); child && !leaf; child = child->nextOnLine()) leaf = child->isLeaf() ? child : static_cast(child)->firstLeafChild(); return leaf; } InlineBox* InlineFlowBox::lastLeafChild() const { InlineBox* leaf = 0; for (InlineBox* child = lastChild(); child && !leaf; child = child->prevOnLine()) leaf = child->isLeaf() ? child : static_cast(child)->lastLeafChild(); return leaf; } RenderObject::SelectionState InlineFlowBox::selectionState() { return RenderObject::SelectionNone; } bool InlineFlowBox::canAccommodateEllipsis(bool ltr, int blockEdge, int ellipsisWidth) { for (InlineBox *box = firstChild(); box; box = box->nextOnLine()) { if (!box->canAccommodateEllipsis(ltr, blockEdge, ellipsisWidth)) return false; } return true; } int InlineFlowBox::placeEllipsisBox(bool ltr, int blockLeftEdge, int blockRightEdge, int ellipsisWidth, bool& foundBox) { int 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. InlineBox *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, foundBox); if (currResult != -1 && result == -1) result = currResult; if (ltr) { visibleLeftEdge += box->logicalWidth(); box = box->nextOnLine(); } else { visibleRightEdge -= box->logicalWidth(); box = box->prevOnLine(); } } return result; } void InlineFlowBox::clearTruncation() { for (InlineBox *box = firstChild(); box; box = box->nextOnLine()) box->clearTruncation(); } int InlineFlowBox::computeBlockDirectionRubyAdjustment(int allowedPosition) const { int result = 0; for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { if (curr->renderer()->isPositioned()) continue; // Positioned placeholders don't affect calculations. if (curr->isInlineFlowBox()) result = max(result, static_cast(curr)->computeBlockDirectionRubyAdjustment(allowedPosition)); if (curr->renderer()->isReplaced() && curr->renderer()->isRubyRun()) { RenderRubyRun* rubyRun = static_cast(curr->renderer()); RenderRubyText* rubyText = rubyRun->rubyText(); if (!rubyText) continue; if (!rubyRun->style()->isFlippedLinesWritingMode()) { int topOfFirstRubyTextLine = rubyText->logicalTop() + (rubyText->firstRootBox() ? rubyText->firstRootBox()->lineTop() : 0); if (topOfFirstRubyTextLine >= 0) continue; topOfFirstRubyTextLine += curr->logicalTop(); result = max(result, allowedPosition - topOfFirstRubyTextLine); } else { int bottomOfLastRubyTextLine = rubyText->logicalTop() + (rubyText->lastRootBox() ? rubyText->lastRootBox()->lineBottom() : rubyText->logicalHeight()); if (bottomOfLastRubyTextLine <= curr->logicalHeight()) continue; bottomOfLastRubyTextLine += curr->logicalTop(); result = max(result, bottomOfLastRubyTextLine - allowedPosition); } } } return result; } #ifndef NDEBUG void InlineFlowBox::checkConsistency() const { #ifdef CHECK_CONSISTENCY ASSERT(!m_hasBadChildList); const InlineBox* prev = 0; for (const InlineBox* child = m_firstChild; child; child = child->nextOnLine()) { ASSERT(child->parent() == this); ASSERT(child->prevOnLine() == prev); prev = child; } ASSERT(prev == m_lastChild); #endif } #endif } // namespace WebCore