--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/WebCore/rendering/InlineFlowBox.cpp Mon Mar 30 12:54:55 2009 +0300
@@ -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 && DeprecatedChar(rt->characters()[text->start()]).isSpace())
+ x += rt->style(m_firstLine)->font().wordSpacing();
+ needsWordSpacing = !DeprecatedChar(rt->characters()[text->end()]).isSpace();
+ }
+ 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() || 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() && !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()) {
+ 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