diff options
Diffstat (limited to 'WebCore/rendering/InlineFlowBox.cpp')
| -rw-r--r-- | WebCore/rendering/InlineFlowBox.cpp | 948 |
1 files changed, 948 insertions, 0 deletions
diff --git a/WebCore/rendering/InlineFlowBox.cpp b/WebCore/rendering/InlineFlowBox.cpp new file mode 100644 index 0000000..5deb002 --- /dev/null +++ b/WebCore/rendering/InlineFlowBox.cpp @@ -0,0 +1,948 @@ +/* + * Copyright (C) 2003, 2004, 2005, 2006, 2007 Apple Inc. All rights reserved. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public License + * along with this library; see the file COPYING.LIB. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + */ + +#include "config.h" +#include "InlineFlowBox.h" + +#include "CachedImage.h" +#include "Document.h" +#include "EllipsisBox.h" +#include "GraphicsContext.h" +#include "InlineTextBox.h" +#include "HitTestResult.h" +#include "RootInlineBox.h" +#include "RenderBlock.h" +#include "RenderFlow.h" +#include "RenderListMarker.h" +#include "RenderTableCell.h" +#include "RootInlineBox.h" +#include "Text.h" + +#include <math.h> + +using namespace std; + +namespace WebCore { + +#ifndef NDEBUG + +InlineFlowBox::~InlineFlowBox() +{ + if (!m_hasBadChildList) + for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) + child->setHasBadParent(); +} + +#endif + +RenderFlow* InlineFlowBox::flowObject() +{ + return static_cast<RenderFlow*>(m_object); +} + +int InlineFlowBox::marginLeft() +{ + if (!includeLeftEdge()) + return 0; + + Length margin = object()->style()->marginLeft(); + if (margin.isAuto()) + return 0; + if (margin.isFixed()) + return margin.value(); + return object()->marginLeft(); +} + +int InlineFlowBox::marginRight() +{ + if (!includeRightEdge()) + return 0; + + Length margin = object()->style()->marginRight(); + if (margin.isAuto()) + return 0; + if (margin.isFixed()) + return margin.value(); + return object()->marginRight(); +} + +int InlineFlowBox::marginBorderPaddingLeft() +{ + return marginLeft() + borderLeft() + paddingLeft(); +} + +int InlineFlowBox::marginBorderPaddingRight() +{ + return marginRight() + borderRight() + paddingRight(); +} + +int InlineFlowBox::getFlowSpacingWidth() +{ + int totWidth = marginBorderPaddingLeft() + marginBorderPaddingRight(); + for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { + if (curr->isInlineFlowBox()) + totWidth += static_cast<InlineFlowBox*>(curr)->getFlowSpacingWidth(); + } + 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); + if (child->isText()) + m_hasTextChildren = true; + if (child->object()->selectionState() != RenderObject::SelectionNone) + root()->setHasSelectedChildren(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 + + static_cast<RenderFlow*>(m_object)->removeLineBox(this); + destroy(arena); +} + +void InlineFlowBox::extractLine() +{ + if (!m_extracted) + static_cast<RenderFlow*>(m_object)->extractLineBox(this); + for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) + child->extractLine(); +} + +void InlineFlowBox::attachLine() +{ + if (m_extracted) + static_cast<RenderFlow*>(m_object)->attachLineBox(this); + for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) + child->attachLine(); +} + +void InlineFlowBox::adjustPosition(int dx, int dy) +{ + InlineRunBox::adjustPosition(dx, dy); + for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) + child->adjustPosition(dx, dy); +} + +bool InlineFlowBox::onEndChain(RenderObject* endObject) +{ + if (!endObject) + return false; + + if (endObject == object()) + return true; + + RenderObject* curr = endObject; + RenderObject* parent = curr->parent(); + while (parent && !parent->isRenderBlock()) { + if (parent->lastChild() != curr || parent == object()) + 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; + + RenderFlow* flow = static_cast<RenderFlow*>(object()); + + if (!flow->firstChild()) + includeLeftEdge = includeRightEdge = true; // Empty inlines never split across lines. + else if (parent()) { // The root inline box never has borders/margins/padding. + bool ltr = flow->style()->direction() == LTR; + + // Check to see if all initial lines are unconstructed. If so, then + // we know the inline began on this line. + if (!flow->firstLineBox()->isConstructed()) { + if (ltr && flow->firstLineBox() == this) + includeLeftEdge = true; + else if (!ltr && flow->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 (!flow->lastLineBox()->isConstructed()) { + if (ltr) { + if (!nextLineBox() && + ((lastLine && !object()->continuation()) || nextOnLineExists() || onEndChain(endObject))) + includeRightEdge = true; + } else { + if ((!prevLineBox() || prevLineBox()->isConstructed()) && + ((lastLine && !object()->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<InlineFlowBox*>(currChild); + currFlow->determineSpacingForFlowBoxes(lastLine, endObject); + } + } +} + +int InlineFlowBox::placeBoxesHorizontally(int x, int& leftPosition, int& rightPosition, bool& needsWordSpacing) +{ + // Set our x position. + setXPos(x); + + int boxShadowLeft = 0; + int boxShadowRight = 0; + if (ShadowData* boxShadow = object()->style(m_firstLine)->boxShadow()) { + boxShadowLeft = min(boxShadow->x - boxShadow->blur, 0); + boxShadowRight = max(boxShadow->x + boxShadow->blur, 0); + } + leftPosition = min(x + boxShadowLeft, leftPosition); + + int startX = x; + x += borderLeft() + paddingLeft(); + + for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { + if (curr->object()->isText()) { + InlineTextBox* text = static_cast<InlineTextBox*>(curr); + RenderText* rt = static_cast<RenderText*>(text->object()); + if (rt->textLength()) { + if (needsWordSpacing && isSpaceOrNewline(rt->characters()[text->start()])) + x += rt->style(m_firstLine)->font().wordSpacing(); + needsWordSpacing = !isSpaceOrNewline(rt->characters()[text->end()]); + } + text->setXPos(x); + + int strokeOverflow = static_cast<int>(ceilf(rt->style()->textStrokeWidth() / 2.0f)); + + // If letter-spacing is negative, we should factor that into right 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()); + + int leftGlyphOverflow = -strokeOverflow; + int rightGlyphOverflow = strokeOverflow - letterSpacing; + + int visualOverflowLeft = leftGlyphOverflow; + int visualOverflowRight = rightGlyphOverflow; + for (ShadowData* shadow = rt->style()->textShadow(); shadow; shadow = shadow->next) { + visualOverflowLeft = min(visualOverflowLeft, shadow->x - shadow->blur + leftGlyphOverflow); + visualOverflowRight = max(visualOverflowRight, shadow->x + shadow->blur + rightGlyphOverflow); + } + + leftPosition = min(x + visualOverflowLeft, leftPosition); + rightPosition = max(x + text->width() + visualOverflowRight, rightPosition); + m_maxHorizontalVisualOverflow = max(max(visualOverflowRight, -visualOverflowLeft), m_maxHorizontalVisualOverflow); + x += text->width(); + } else { + if (curr->object()->isPositioned()) { + if (curr->object()->parent()->style()->direction() == LTR) + curr->setXPos(x); + 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->setXPos(root()->object()->width()-x); + continue; // The positioned object has no effect on the width. + } + if (curr->object()->isInlineFlow()) { + InlineFlowBox* flow = static_cast<InlineFlowBox*>(curr); + if (curr->object()->isCompact()) { + int ignoredX = x; + flow->placeBoxesHorizontally(ignoredX, leftPosition, rightPosition, needsWordSpacing); + } else { + x += flow->marginLeft(); + x = flow->placeBoxesHorizontally(x, leftPosition, rightPosition, needsWordSpacing); + x += flow->marginRight(); + } + } else if (!curr->object()->isCompact() && (!curr->object()->isListMarker() || static_cast<RenderListMarker*>(curr->object())->isInside())) { + x += curr->object()->marginLeft(); + curr->setXPos(x); + leftPosition = min(x + curr->object()->overflowLeft(false), leftPosition); + rightPosition = max(x + curr->object()->overflowWidth(false), rightPosition); + x += curr->width() + curr->object()->marginRight(); + } + } + } + + x += borderRight() + paddingRight(); + setWidth(x - startX); + rightPosition = max(xPos() + width() + boxShadowRight, rightPosition); + + return x; +} + +void InlineFlowBox::verticallyAlignBoxes(int& heightOfBlock) +{ + int maxPositionTop = 0; + int maxPositionBottom = 0; + int maxAscent = 0; + int maxDescent = 0; + + // Figure out if we're in strict mode. Note that we can't simply use !style()->htmlHacks(), + // because that would match almost strict mode as well. + RenderObject* curr = object(); + while (curr && !curr->element()) + curr = curr->container(); + bool strictMode = (curr && curr->document()->inStrictMode()); + + computeLogicalBoxHeights(maxPositionTop, maxPositionBottom, maxAscent, maxDescent, strictMode); + + if (maxAscent + maxDescent < max(maxPositionTop, maxPositionBottom)) + adjustMaxAscentAndDescent(maxAscent, maxDescent, maxPositionTop, maxPositionBottom); + + int maxHeight = maxAscent + maxDescent; + int topPosition = heightOfBlock; + int bottomPosition = heightOfBlock; + int selectionTop = heightOfBlock; + int selectionBottom = heightOfBlock; + placeBoxesVertically(heightOfBlock, maxHeight, maxAscent, strictMode, topPosition, bottomPosition, selectionTop, selectionBottom); + + setVerticalOverflowPositions(topPosition, bottomPosition); + setVerticalSelectionPositions(selectionTop, selectionBottom); + + // Shrink boxes with no text children in quirks and almost strict mode. + if (!strictMode) + shrinkBoxesWithNoTextChildren(topPosition, bottomPosition); + + heightOfBlock += maxHeight; +} + +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->object()->isPositioned()) + continue; // Positioned placeholders don't affect calculations. + if (curr->yPos() == PositionTop || curr->yPos() == PositionBottom) { + if (curr->yPos() == PositionTop) { + if (maxAscent + maxDescent < curr->height()) + maxDescent = curr->height() - maxAscent; + } + else { + if (maxAscent + maxDescent < curr->height()) + maxAscent = curr->height() - maxDescent; + } + + if (maxAscent + maxDescent >= max(maxPositionTop, maxPositionBottom)) + break; + } + + if (curr->isInlineFlowBox()) + static_cast<InlineFlowBox*>(curr)->adjustMaxAscentAndDescent(maxAscent, maxDescent, maxPositionTop, maxPositionBottom); + } +} + +void InlineFlowBox::computeLogicalBoxHeights(int& maxPositionTop, int& maxPositionBottom, + int& maxAscent, int& maxDescent, bool strictMode) +{ + if (isRootInlineBox()) { + // Examine our root box. + setHeight(object()->lineHeight(m_firstLine, true)); + bool isTableCell = object()->isTableCell(); + if (isTableCell) { + RenderTableCell* tableCell = static_cast<RenderTableCell*>(object()); + setBaseline(tableCell->RenderBlock::baselinePosition(m_firstLine, true)); + } + else + setBaseline(object()->baselinePosition(m_firstLine, true)); + if (hasTextChildren() || strictMode) { + int ascent = baseline(); + int descent = height() - ascent; + if (maxAscent < ascent) + maxAscent = ascent; + if (maxDescent < descent) + maxDescent = descent; + } + } + + for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { + if (curr->object()->isPositioned()) + continue; // Positioned placeholders don't affect calculations. + + curr->setHeight(curr->object()->lineHeight(m_firstLine)); + curr->setBaseline(curr->object()->baselinePosition(m_firstLine)); + curr->setYPos(curr->object()->verticalPositionHint(m_firstLine)); + if (curr->yPos() == PositionTop) { + if (maxPositionTop < curr->height()) + maxPositionTop = curr->height(); + } + else if (curr->yPos() == PositionBottom) { + if (maxPositionBottom < curr->height()) + maxPositionBottom = curr->height(); + } + else if (curr->hasTextChildren() || curr->object()->hasHorizontalBordersOrPadding() || strictMode) { + int ascent = curr->baseline() - curr->yPos(); + int descent = curr->height() - ascent; + if (maxAscent < ascent) + maxAscent = ascent; + if (maxDescent < descent) + maxDescent = descent; + } + + if (curr->isInlineFlowBox()) + static_cast<InlineFlowBox*>(curr)->computeLogicalBoxHeights(maxPositionTop, maxPositionBottom, maxAscent, maxDescent, strictMode); + } +} + +void InlineFlowBox::placeBoxesVertically(int y, int maxHeight, int maxAscent, bool strictMode, + int& topPosition, int& bottomPosition, int& selectionTop, int& selectionBottom) +{ + if (isRootInlineBox()) + setYPos(y + maxAscent - baseline());// Place our root box. + + for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { + if (curr->object()->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). + if (curr->isInlineFlowBox()) + static_cast<InlineFlowBox*>(curr)->placeBoxesVertically(y, maxHeight, maxAscent, strictMode, topPosition, bottomPosition, selectionTop, selectionBottom); + + bool childAffectsTopBottomPos = true; + if (curr->yPos() == PositionTop) + curr->setYPos(y); + else if (curr->yPos() == PositionBottom) + curr->setYPos(y + maxHeight - curr->height()); + else { + if (!curr->hasTextChildren() && !curr->object()->hasHorizontalBordersOrPadding() && !strictMode) + childAffectsTopBottomPos = false; + curr->setYPos(curr->yPos() + y + maxAscent - curr->baseline()); + } + + int newY = curr->yPos(); + int newHeight = curr->height(); + int newBaseline = curr->baseline(); + int overflowTop = 0; + int overflowBottom = 0; + if (curr->isText() || curr->isInlineFlowBox()) { + const Font& font = curr->object()->style(m_firstLine)->font(); + newBaseline = font.ascent(); + newY += curr->baseline() - newBaseline; + newHeight = newBaseline + font.descent(); + for (ShadowData* shadow = curr->object()->style()->textShadow(); shadow; shadow = shadow->next) { + overflowTop = min(overflowTop, shadow->y - shadow->blur); + overflowBottom = max(overflowBottom, shadow->y + shadow->blur); + } + + if (ShadowData* boxShadow = curr->object()->style(m_firstLine)->boxShadow()) { + overflowTop = min(overflowTop, boxShadow->y - boxShadow->blur); + overflowBottom = max(overflowBottom, boxShadow->y + boxShadow->blur); + } + + if (curr->isInlineFlowBox()) { + newHeight += curr->object()->borderTop() + curr->object()->paddingTop() + + curr->object()->borderBottom() + curr->object()->paddingBottom(); + newY -= curr->object()->borderTop() + curr->object()->paddingTop(); + newBaseline += curr->object()->borderTop() + curr->object()->paddingTop(); + } + } else if (!curr->object()->isBR()) { + newY += curr->object()->marginTop(); + newHeight = curr->height() - (curr->object()->marginTop() + curr->object()->marginBottom()); + overflowTop = curr->object()->overflowTop(false); + overflowBottom = curr->object()->overflowHeight(false) - newHeight; + } + + curr->setYPos(newY); + curr->setHeight(newHeight); + curr->setBaseline(newBaseline); + + if (childAffectsTopBottomPos) { + selectionTop = min(selectionTop, newY); + selectionBottom = max(selectionBottom, newY + newHeight); + topPosition = min(topPosition, newY + overflowTop); + bottomPosition = max(bottomPosition, newY + newHeight + overflowBottom); + } + } + + if (isRootInlineBox()) { + const Font& font = object()->style(m_firstLine)->font(); + setHeight(font.ascent() + font.descent()); + setYPos(yPos() + baseline() - font.ascent()); + setBaseline(font.ascent()); + if (hasTextChildren() || strictMode) { + selectionTop = min(selectionTop, yPos()); + selectionBottom = max(selectionBottom, yPos() + height()); + } + } +} + +void InlineFlowBox::shrinkBoxesWithNoTextChildren(int topPos, int bottomPos) +{ + // First shrink our kids. + for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { + if (curr->object()->isPositioned()) + continue; // Positioned placeholders don't affect calculations. + + if (curr->isInlineFlowBox()) + static_cast<InlineFlowBox*>(curr)->shrinkBoxesWithNoTextChildren(topPos, bottomPos); + } + + // See if we have text children. If not, then we need to shrink ourselves to fit on the line. + if (!hasTextChildren() && !object()->hasHorizontalBordersOrPadding()) { + if (yPos() < topPos) + setYPos(topPos); + if (yPos() + height() > bottomPos) + setHeight(bottomPos - yPos()); + if (baseline() > height()) + setBaseline(height()); + } +} + +bool InlineFlowBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty) +{ + // Check children first. + for (InlineBox* curr = lastChild(); curr; curr = curr->prevOnLine()) { + if (!curr->object()->hasLayer() && curr->nodeAtPoint(request, result, x, y, tx, ty)) { + object()->updateHitTestResult(result, IntPoint(x - tx, y - ty)); + return true; + } + } + + // Now check ourselves. + IntRect rect(tx + m_x, ty + m_y, m_width, m_height); + if (object()->style()->visibility() == VISIBLE && rect.contains(x, y)) { + object()->updateHitTestResult(result, IntPoint(x - tx, y - ty)); // Don't add in m_x or m_y here, we want coords in the containing block's space. + return true; + } + + return false; +} + +void InlineFlowBox::paint(RenderObject::PaintInfo& paintInfo, int tx, int ty) +{ + int xPos = tx + m_x - object()->maximalOutlineSize(paintInfo.phase); + int w = width() + 2 * object()->maximalOutlineSize(paintInfo.phase); + if (ShadowData* boxShadow = object()->style(m_firstLine)->boxShadow()) { + int shadowLeft = min(boxShadow->x - boxShadow->blur, 0); + xPos += shadowLeft; + w += -shadowLeft + max(boxShadow->x + boxShadow->blur, 0); + } + bool intersectsDamageRect = xPos < paintInfo.rect.right() && xPos + w > paintInfo.rect.x(); + + if (intersectsDamageRect && 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 (object()->style()->visibility() == VISIBLE && object()->hasOutline() && !isRootInlineBox()) { + if ((object()->continuation() || object()->isInlineContinuation()) && !object()->hasLayer()) { + // Add ourselves to the containing block of the entire continuation so that it can + // paint us atomically. + RenderBlock* block = object()->containingBlock()->containingBlock(); + block->addContinuationWithOutline(static_cast<RenderFlow*>(object()->element()->renderer())); + } else if (!object()->isInlineContinuation()) + paintInfo.outlineObjects->add(flowObject()); + } + } else { + // 1. Paint our background, border and box-shadow. + paintBoxDecorations(paintInfo, tx, ty); + + // 2. Paint our underline and overline. + paintTextDecorations(paintInfo, tx, ty, false); + } + } + + PaintPhase paintPhase = paintInfo.phase == PaintPhaseChildOutlines ? PaintPhaseOutline : paintInfo.phase; + RenderObject::PaintInfo childInfo(paintInfo); + childInfo.phase = paintPhase; + childInfo.paintingRoot = object()->paintingRootForChildren(paintInfo); + + // 3. Paint our children. + if (paintPhase != PaintPhaseSelfOutline) { + for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { + if (!curr->object()->hasLayer()) + curr->paint(childInfo, tx, ty); + } + } + + // 4. Paint our strike-through + if (intersectsDamageRect && (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection)) + paintTextDecorations(paintInfo, tx, ty, true); +} + +void InlineFlowBox::paintBackgrounds(GraphicsContext* p, const Color& c, const BackgroundLayer* bgLayer, + int my, int mh, int _tx, int _ty, int w, int h) +{ + if (!bgLayer) + return; + paintBackgrounds(p, c, bgLayer->next(), my, mh, _tx, _ty, w, h); + paintBackground(p, c, bgLayer, my, mh, _tx, _ty, w, h); +} + +void InlineFlowBox::paintBackground(GraphicsContext* context, const Color& c, const BackgroundLayer* bgLayer, + int my, int mh, int tx, int ty, int w, int h) +{ + CachedImage* bg = bgLayer->backgroundImage(); + bool hasBackgroundImage = bg && bg->canRender(); + if ((!hasBackgroundImage && !object()->style()->hasBorderRadius()) || (!prevLineBox() && !nextLineBox()) || !parent()) + object()->paintBackgroundExtended(context, c, bgLayer, my, mh, tx, ty, w, h); + else { + // We have a background 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 xOffsetOnLine = 0; + for (InlineRunBox* curr = prevLineBox(); curr; curr = curr->prevLineBox()) + xOffsetOnLine += curr->width(); + int startX = tx - xOffsetOnLine; + int totalWidth = xOffsetOnLine; + for (InlineRunBox* curr = this; curr; curr = curr->nextLineBox()) + totalWidth += curr->width(); + context->save(); + context->clip(IntRect(tx, ty, width(), height())); + object()->paintBackgroundExtended(context, c, bgLayer, my, mh, startX, ty, + totalWidth, h, includeLeftEdge(), includeRightEdge()); + context->restore(); + } +} + +void InlineFlowBox::paintBoxShadow(GraphicsContext* context, RenderStyle* s, int tx, int ty, int w, int h) +{ + if ((!prevLineBox() && !nextLineBox()) || !parent()) + object()->paintBoxShadow(context, tx, ty, w, h, s); + 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 + object()->paintBoxShadow(context, tx, ty, w, h, s, includeLeftEdge(), includeRightEdge()); + } +} + +void InlineFlowBox::paintBoxDecorations(RenderObject::PaintInfo& paintInfo, int tx, int ty) +{ + if (!object()->shouldPaintWithinRoot(paintInfo) || object()->style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseForeground) + return; + + // Move x/y to our coordinates. + tx += m_x; + ty += m_y; + + int w = width(); + int h = height(); + + int my = max(ty, paintInfo.rect.y()); + int mh; + if (ty < paintInfo.rect.y()) + mh = max(0, h - (paintInfo.rect.y() - ty)); + else + mh = min(paintInfo.rect.height(), h); + + 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 = object()->style(m_firstLine); + if ((!parent() && m_firstLine && styleToUse != object()->style()) || (parent() && object()->hasBoxDecorations())) { + // Shadow comes first and is behind the background and border. + if (styleToUse->boxShadow()) + paintBoxShadow(context, styleToUse, tx, ty, w, h); + + Color c = styleToUse->backgroundColor(); + paintBackgrounds(context, c, styleToUse->backgroundLayers(), my, mh, 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() && object()->style()->hasBorder()) { + CachedImage* borderImage = object()->style()->borderImage().image(); + bool hasBorderImage = borderImage && borderImage->canRender(); + 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())) + object()->paintBorder(context, tx, ty, w, h, object()->style(), includeLeftEdge(), includeRightEdge()); + 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 xOffsetOnLine = 0; + for (InlineRunBox* curr = prevLineBox(); curr; curr = curr->prevLineBox()) + xOffsetOnLine += curr->width(); + int startX = tx - xOffsetOnLine; + int totalWidth = xOffsetOnLine; + for (InlineRunBox* curr = this; curr; curr = curr->nextLineBox()) + totalWidth += curr->width(); + context->save(); + context->clip(IntRect(tx, ty, width(), height())); + object()->paintBorder(context, startX, ty, totalWidth, h, object()->style()); + context->restore(); + } + } + } +} + +static bool shouldDrawTextDecoration(RenderObject* obj) +{ + for (RenderObject* curr = obj->firstChild(); curr; curr = curr->nextSibling()) { + if (curr->isInlineFlow()) + return true; + if (curr->isText() && !curr->isBR()) { + if (!curr->style()->collapseWhiteSpace()) + return true; + Node* currElement = curr->element(); + if (!currElement) + return true; + if (!currElement->isTextNode()) + return true; + if (!static_cast<Text*>(currElement)->containsOnlyWhitespace()) + return true; + } + } + return false; +} + +void InlineFlowBox::paintTextDecorations(RenderObject::PaintInfo& paintInfo, int tx, int ty, bool paintedChildren) +{ + // Paint text decorations like underlines/overlines. We only do this if we aren't in quirks mode (i.e., in + // almost-strict mode or strict mode). + if (object()->style()->htmlHacks() || !object()->shouldPaintWithinRoot(paintInfo) || + object()->style()->visibility() != VISIBLE) + return; + + // We don't want underlines or other decorations when we're trying to draw nothing but the selection as white text. + if (paintInfo.phase == PaintPhaseSelection && paintInfo.forceBlackText) + return; + + GraphicsContext* context = paintInfo.context; + tx += m_x; + ty += m_y; + RenderStyle* styleToUse = object()->style(m_firstLine); + int deco = parent() ? styleToUse->textDecoration() : styleToUse->textDecorationsInEffect(); + if (deco != TDNONE && + ((!paintedChildren && ((deco & UNDERLINE) || (deco & OVERLINE))) || (paintedChildren && (deco & LINE_THROUGH))) && + shouldDrawTextDecoration(object())) { + int x = m_x + borderLeft() + paddingLeft(); + int w = m_width - (borderLeft() + paddingLeft() + borderRight() + paddingRight()); + RootInlineBox* rootLine = root(); + if (rootLine->ellipsisBox()) { + int ellipsisX = rootLine->ellipsisBox()->xPos(); + int ellipsisWidth = rootLine->ellipsisBox()->width(); + + // FIXME: Will need to work with RTL + if (rootLine == this) { + if (x + w >= ellipsisX + ellipsisWidth) + w -= (x + w - ellipsisX - ellipsisWidth); + } else { + if (x >= ellipsisX) + return; + if (x + w >= ellipsisX) + w -= (x + w - ellipsisX); + } + } + + // Set up the appropriate text-shadow effect for the decoration. + // FIXME: Support multiple shadow effects. Need more from the CG API before we can do this. + bool setShadow = false; + if (styleToUse->textShadow()) { + context->setShadow(IntSize(styleToUse->textShadow()->x, styleToUse->textShadow()->y), + styleToUse->textShadow()->blur, styleToUse->textShadow()->color); + setShadow = true; + } + + // We must have child boxes and have decorations defined. + tx += borderLeft() + paddingLeft(); + + Color underline, overline, linethrough; + underline = overline = linethrough = styleToUse->color(); + if (!parent()) + object()->getTextDecorationColors(deco, underline, overline, linethrough); + + if (styleToUse->font() != context->font()) + context->setFont(styleToUse->font()); + + bool isPrinting = object()->document()->printing(); + context->setStrokeThickness(1.0f); // FIXME: We should improve this rule and not always just assume 1. + if (deco & UNDERLINE && !paintedChildren) { + context->setStrokeColor(underline); + // Leave one pixel of white between the baseline and the underline. + context->drawLineForText(IntPoint(tx, ty + m_baseline + 1), w, isPrinting); + } + if (deco & OVERLINE && !paintedChildren) { + context->setStrokeColor(overline); + context->drawLineForText(IntPoint(tx, ty), w, isPrinting); + } + if (deco & LINE_THROUGH && paintedChildren) { + context->setStrokeColor(linethrough); + context->drawLineForText(IntPoint(tx, ty + 2 * m_baseline / 3), w, isPrinting); + } + + if (setShadow) + context->clearShadow(); + } +} + +InlineBox* InlineFlowBox::firstLeafChild() +{ + return firstLeafChildAfterBox(); +} + +InlineBox* InlineFlowBox::lastLeafChild() +{ + return lastLeafChildBeforeBox(); +} + +InlineBox* InlineFlowBox::firstLeafChildAfterBox(InlineBox* start) +{ + InlineBox* leaf = 0; + for (InlineBox* box = start ? start->nextOnLine() : firstChild(); box && !leaf; box = box->nextOnLine()) + leaf = box->firstLeafChild(); + if (start && !leaf && parent()) + return parent()->firstLeafChildAfterBox(this); + return leaf; +} + +InlineBox* InlineFlowBox::lastLeafChildBeforeBox(InlineBox* start) +{ + InlineBox* leaf = 0; + for (InlineBox* box = start ? start->prevOnLine() : lastChild(); box && !leaf; box = box->prevOnLine()) + leaf = box->lastLeafChild(); + if (start && !leaf && parent()) + return parent()->lastLeafChildBeforeBox(this); + 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 blockEdge, int ellipsisWidth, bool& foundBox) +{ + int result = -1; + for (InlineBox *box = firstChild(); box; box = box->nextOnLine()) { + int currResult = box->placeEllipsisBox(ltr, blockEdge, ellipsisWidth, foundBox); + if (currResult != -1 && result == -1) + result = currResult; + } + return result; +} + +void InlineFlowBox::clearTruncation() +{ + for (InlineBox *box = firstChild(); box; box = box->nextOnLine()) + box->clearTruncation(); +} + +#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 |