/*
* 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 "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 "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
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;
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)
{
InlineRunBox::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()->direction() == LTR;
// 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()->isInlineContinuation()) {
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<InlineFlowBox*>(currChild);
currFlow->determineSpacingForFlowBoxes(lastLine, endObject);
}
}
}
int InlineFlowBox::placeBoxesHorizontally(int xPos, bool& needsWordSpacing)
{
// Set our x position.
setX(xPos);
int leftLayoutOverflow = xPos;
int rightLayoutOverflow = xPos;
int leftVisualOverflow = xPos;
int rightVisualOverflow = xPos;
int boxShadowLeft;
int boxShadowRight;
renderer()->style(m_firstLine)->getBoxShadowHorizontalExtent(boxShadowLeft, boxShadowRight);
leftVisualOverflow = min(xPos + boxShadowLeft, leftVisualOverflow);
int startX = xPos;
xPos += borderLeft() + paddingLeft();
for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) {
if (curr->renderer()->isText()) {
InlineTextBox* text = static_cast<InlineTextBox*>(curr);
RenderText* rt = toRenderText(text->renderer());
if (rt->textLength()) {
if (needsWordSpacing && isSpaceOrNewline(rt->characters()[text->start()]))
xPos += rt->style(m_firstLine)->font().wordSpacing();
needsWordSpacing = !isSpaceOrNewline(rt->characters()[text->end()]);
}
text->setX(xPos);
int strokeOverflow = static_cast<int>(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());
rightLayoutOverflow = max(xPos + text->width() - letterSpacing, rightLayoutOverflow);
int leftGlyphOverflow = -strokeOverflow;
int rightGlyphOverflow = strokeOverflow - letterSpacing;
int childOverflowLeft = leftGlyphOverflow;
int childOverflowRight = rightGlyphOverflow;
for (ShadowData* shadow = rt->style()->textShadow(); shadow; shadow = shadow->next) {
childOverflowLeft = min(childOverflowLeft, shadow->x - shadow->blur + leftGlyphOverflow);
childOverflowRight = max(childOverflowRight, shadow->x + shadow->blur + rightGlyphOverflow);
}
leftVisualOverflow = min(xPos + childOverflowLeft, leftVisualOverflow);
rightVisualOverflow = max(xPos + text->width() + childOverflowRight, rightVisualOverflow);
xPos += text->width();
} else {
if (curr->renderer()->isPositioned()) {
if (curr->renderer()->parent()->style()->direction() == LTR)
curr->setX(xPos);
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->setX(root()->block()->width() - xPos);
continue; // The positioned object has no effect on the width.
}
if (curr->renderer()->isRenderInline()) {
InlineFlowBox* flow = static_cast<InlineFlowBox*>(curr);
xPos += flow->marginLeft();
xPos = flow->placeBoxesHorizontally(xPos, needsWordSpacing);
xPos += flow->marginRight();
leftLayoutOverflow = min(leftLayoutOverflow, flow->leftLayoutOverflow());
rightLayoutOverflow = max(rightLayoutOverflow, flow->rightLayoutOverflow());
leftVisualOverflow = min(leftVisualOverflow, flow->leftVisualOverflow());
rightVisualOverflow = max(rightVisualOverflow, flow->rightVisualOverflow());
} else if (!curr->renderer()->isListMarker() || toRenderListMarker(curr->renderer())->isInside()) {
xPos += curr->boxModelObject()->marginLeft();
curr->setX(xPos);
RenderBox* box = toRenderBox(curr->renderer());
int childLeftOverflow = box->hasOverflowClip() ? 0 : box->leftLayoutOverflow();
int childRightOverflow = box->hasOverflowClip() ? curr->width() : box->rightLayoutOverflow();
leftLayoutOverflow = min(xPos + childLeftOverflow, leftLayoutOverflow);
rightLayoutOverflow = max(xPos + childRightOverflow, rightLayoutOverflow);
leftVisualOverflow = min(xPos + box->leftVisualOverflow(), leftVisualOverflow);
rightVisualOverflow = max(xPos + box->rightVisualOverflow(), rightVisualOverflow);
xPos += curr->width() + curr->boxModelObject()->marginRight();
}
}
}
xPos += borderRight() + paddingRight();
setWidth(xPos - startX);
rightVisualOverflow = max(x() + width() + boxShadowRight, rightVisualOverflow);
rightLayoutOverflow = max(x() + width(), rightLayoutOverflow);
setHorizontalOverflowPositions(leftLayoutOverflow, rightLayoutOverflow, leftVisualOverflow, rightVisualOverflow);
return xPos;
}
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->y() == PositionTop || curr->y() == PositionBottom) {
int lineHeight = curr->lineHeight(false);
if (curr->y() == 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<InlineFlowBox*>(curr)->adjustMaxAscentAndDescent(maxAscent, maxDescent, maxPositionTop, maxPositionBottom);
}
}
static int verticalPositionForBox(InlineBox* curr, bool firstLine)
{
if (curr->renderer()->isText())
return curr->parent()->y();
if (curr->renderer()->isBox())
return toRenderBox(curr->renderer())->verticalPosition(firstLine);
return toRenderInline(curr->renderer())->verticalPositionFromCache(firstLine);
}
void InlineFlowBox::computeLogicalBoxHeights(int& maxPositionTop, int& maxPositionBottom,
int& maxAscent, int& maxDescent, bool strictMode)
{
if (isRootInlineBox()) {
// Examine our root box.
int height = lineHeight(true);
int baseline = baselinePosition(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->renderer()->isPositioned())
continue; // Positioned placeholders don't affect calculations.
bool isInlineFlow = curr->isInlineFlowBox();
int lineHeight;
int baseline;
Vector<const SimpleFontData*> usedFonts;
if (curr->isInlineTextBox())
static_cast<InlineTextBox*>(curr)->takeFallbackFonts(usedFonts);
if (!usedFonts.isEmpty()) {
usedFonts.append(curr->renderer()->style(m_firstLine)->font().primaryFont());
Length parentLineHeight = curr->renderer()->parent()->style()->lineHeight();
if (parentLineHeight.isNegative()) {
int baselineToBottom = 0;
baseline = 0;
for (size_t i = 0; i < usedFonts.size(); ++i) {
int halfLeading = (usedFonts[i]->lineSpacing() - usedFonts[i]->ascent() - usedFonts[i]->descent()) / 2;
baseline = max(baseline, halfLeading + usedFonts[i]->ascent());
baselineToBottom = max(baselineToBottom, usedFonts[i]->lineSpacing() - usedFonts[i]->ascent() - usedFonts[i]->descent() - halfLeading);
}
lineHeight = baseline + baselineToBottom;
} else if (parentLineHeight.isPercent()) {
lineHeight = parentLineHeight.calcMinValue(curr->renderer()->style()->fontSize());
baseline = 0;
for (size_t i = 0; i < usedFonts.size(); ++i) {
int halfLeading = (lineHeight - usedFonts[i]->ascent() - usedFonts[i]->descent()) / 2;
baseline = max(baseline, halfLeading + usedFonts[i]->ascent());
}
} else {
lineHeight = parentLineHeight.value();
baseline = 0;
for (size_t i = 0; i < usedFonts.size(); ++i) {
int halfLeading = (lineHeight - usedFonts[i]->ascent() - usedFonts[i]->descent()) / 2;
baseline = max(baseline, halfLeading + usedFonts[i]->ascent());
}
}
} else {
lineHeight = curr->lineHeight(false);
baseline = curr->baselinePosition(false);
}
curr->setY(verticalPositionForBox(curr, m_firstLine));
if (curr->y() == PositionTop) {
if (maxPositionTop < lineHeight)
maxPositionTop = lineHeight;
} else if (curr->y() == PositionBottom) {
if (maxPositionBottom < lineHeight)
maxPositionBottom = lineHeight;
} else if ((!isInlineFlow || static_cast<InlineFlowBox*>(curr)->hasTextChildren()) || curr->boxModelObject()->hasHorizontalBordersOrPadding() || strictMode) {
int ascent = baseline - curr->y();
int descent = lineHeight - 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 yPos, int maxHeight, int maxAscent, bool strictMode, int& selectionTop, int& selectionBottom)
{
if (isRootInlineBox())
setY(yPos + maxAscent - baselinePosition(true)); // 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<InlineFlowBox*>(curr)->placeBoxesVertically(yPos, maxHeight, maxAscent, strictMode, selectionTop, selectionBottom);
bool childAffectsTopBottomPos = true;
if (curr->y() == PositionTop)
curr->setY(yPos);
else if (curr->y() == PositionBottom)
curr->setY(yPos + maxHeight - curr->lineHeight(false));
else {
if ((isInlineFlow && !static_cast<InlineFlowBox*>(curr)->hasTextChildren()) && !curr->boxModelObject()->hasHorizontalBordersOrPadding() && !strictMode)
childAffectsTopBottomPos = false;
int posAdjust = maxAscent - curr->baselinePosition(false);
curr->setY(curr->y() + yPos + posAdjust);
}
int newY = curr->y();
if (curr->isText() || curr->isInlineFlowBox()) {
const Font& font = curr->renderer()->style(m_firstLine)->font();
newY += curr->baselinePosition(false) - font.ascent();
if (curr->isInlineFlowBox())
newY -= curr->boxModelObject()->borderTop() + curr->boxModelObject()->paddingTop();
} else if (!curr->renderer()->isBR()) {
RenderBox* box = toRenderBox(curr->renderer());
newY += box->marginTop();
}
curr->setY(newY);
if (childAffectsTopBottomPos) {
int boxHeight = curr->height();
selectionTop = min(selectionTop, newY);
selectionBottom = max(selectionBottom, newY + boxHeight);
}
}
if (isRootInlineBox()) {
const Font& font = renderer()->style(m_firstLine)->font();
setY(y() + baselinePosition(true) - font.ascent());
if (hasTextChildren() || strictMode) {
selectionTop = min(selectionTop, y());
selectionBottom = max(selectionBottom, y() + height());
}
}
}
void InlineFlowBox::computeVerticalOverflow(int lineTop, int lineBottom, bool strictMode)
{
int boxHeight = height();
// 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(y(), lineTop);
int bottomOverflow = min(y() + 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)->getBoxShadowVerticalExtent(boxShadowTop, boxShadowBottom);
topVisualOverflow = min(y() + boxShadowTop, topVisualOverflow);
bottomVisualOverflow = max(y() + 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<InlineTextBox*>(curr);
RenderText* rt = toRenderText(text->renderer());
if (rt->isBR())
continue;
int strokeOverflow = static_cast<int>(ceilf(rt->style()->textStrokeWidth() / 2.0f));
int topGlyphOverflow = -strokeOverflow;
int bottomGlyphOverflow = strokeOverflow;
int childOverflowTop = topGlyphOverflow;
int childOverflowBottom = bottomGlyphOverflow;
for (ShadowData* shadow = rt->style()->textShadow(); shadow; shadow = shadow->next) {
childOverflowTop = min(childOverflowTop, shadow->y - shadow->blur + topGlyphOverflow);
childOverflowBottom = max(childOverflowBottom, shadow->y + shadow->blur + bottomGlyphOverflow);
}
topVisualOverflow = min(curr->y() + childOverflowTop, topVisualOverflow);
bottomVisualOverflow = max(curr->y() + text->height() + childOverflowBottom, bottomVisualOverflow);
} else if (curr->renderer()->isRenderInline()) {
InlineFlowBox* flow = static_cast<InlineFlowBox*>(curr);
flow->computeVerticalOverflow(lineTop, lineBottom, strictMode);
topLayoutOverflow = min(topLayoutOverflow, flow->topLayoutOverflow());
bottomLayoutOverflow = max(bottomLayoutOverflow, flow->bottomLayoutOverflow());
topVisualOverflow = min(topVisualOverflow, flow->topVisualOverflow());
bottomVisualOverflow = max(bottomVisualOverflow, flow->bottomVisualOverflow());
} else if (!curr->boxModelObject()->hasSelfPaintingLayer()){
// Only include overflow from replaced inlines if they do not paint themselves.
RenderBox* box = toRenderBox(curr->renderer());
int boxY = curr->y();
int childTopOverflow = box->hasOverflowClip() ? 0 : box->topLayoutOverflow();
int childBottomOverflow = box->hasOverflowClip() ? curr->height() : box->bottomLayoutOverflow();
topLayoutOverflow = min(boxY + childTopOverflow, topLayoutOverflow);
bottomLayoutOverflow = max(boxY + childBottomOverflow, bottomLayoutOverflow);
topVisualOverflow = min(boxY + box->topVisualOverflow(), topVisualOverflow);
bottomVisualOverflow = max(boxY + box->bottomVisualOverflow(), bottomVisualOverflow);
}
}
setVerticalOverflowPositions(topLayoutOverflow, bottomLayoutOverflow, topVisualOverflow, bottomVisualOverflow, boxHeight);
}
bool InlineFlowBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty)
{
IntRect overflowRect(visibleOverflowRect());
overflowRect.move(tx, ty);
if (!overflowRect.contains(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.
IntRect rect(tx + m_x, ty + m_y, m_width, height());
if (visibleToHitTesting() && rect.contains(x, y)) {
renderer()->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)
{
IntRect overflowRect(visibleOverflowRect());
overflowRect.inflate(renderer()->maximalOutlineSize(paintInfo.phase));
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->isInlineContinuation();
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->isInlineContinuation())
paintInfo.outlineObjects->add(inlineFlow);
}
} else if (paintInfo.phase == PaintPhaseMask) {
paintMask(paintInfo, tx, ty);
return;
} else {
// 1. Paint our background, border and box-shadow.
paintBoxDecorations(paintInfo, tx, ty);
// 2. Paint our underline and overline.
paintTextDecorations(paintInfo, tx, ty, false);
}
}
if (paintInfo.phase == PaintPhaseMask)
return;
PaintPhase paintPhase = paintInfo.phase == PaintPhaseChildOutlines ? PaintPhaseOutline : paintInfo.phase;
RenderObject::PaintInfo childInfo(paintInfo);
childInfo.phase = paintPhase;
childInfo.paintingRoot = renderer()->paintingRootForChildren(paintInfo);
// 3. 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);
}
}
// 4. Paint our strike-through
if (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection)
paintTextDecorations(paintInfo, tx, ty, true);
}
void InlineFlowBox::paintFillLayers(const RenderObject::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 RenderObject::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 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();
paintInfo.context->save();
paintInfo.context->clip(IntRect(tx, ty, width(), height()));
boxModelObject()->paintFillLayerExtended(paintInfo, c, fillLayer, startX, ty, totalWidth, h, 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, includeLeftEdge(), includeRightEdge());
}
}
void InlineFlowBox::paintBoxDecorations(RenderObject::PaintInfo& paintInfo, int tx, int ty)
{
if (!renderer()->shouldPaintWithinRoot(paintInfo) || 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 strictMode = renderer()->document()->inStrictMode();
if (!hasTextChildren() && !strictMode) {
RootInlineBox* rootBox = root();
int bottom = min(rootBox->lineBottom(), y + h);
y = max(rootBox->lineTop(), y);
h = bottom - y;
}
// Move x/y to our coordinates.
tx += x;
ty += 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->backgroundColor();
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(), 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, w, h));
boxModelObject()->paintBorder(context, startX, ty, totalWidth, h, renderer()->style());
context->restore();
}
}
}
}
void InlineFlowBox::paintMask(RenderObject::PaintInfo& paintInfo, int tx, int ty)
{
if (!renderer()->shouldPaintWithinRoot(paintInfo) || 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 strictMode = renderer()->document()->inStrictMode();
if (!hasTextChildren() && !strictMode) {
RootInlineBox* rootBox = root();
int bottom = min(rootBox->lineBottom(), y + h);
y = max(rootBox->lineTop(), y);
h = bottom - y;
}
// Move x/y to our coordinates.
tx += x;
ty += 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 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();
paintInfo.context->save();
paintInfo.context->clip(IntRect(tx, ty, w, h));
boxModelObject()->paintNinePieceImage(paintInfo.context, startX, ty, totalWidth, h, renderer()->style(), maskNinePieceImage, compositeOp);
paintInfo.context->restore();
}
if (pushTransparencyLayer)
paintInfo.context->endTransparencyLayer();
}
static bool shouldDrawTextDecoration(RenderObject* obj)
{
for (RenderObject* curr = obj->firstChild(); curr; curr = curr->nextSibling()) {
if (curr->isRenderInline())
return true;
if (curr->isText() && !curr->isBR()) {
if (!curr->style()->collapseWhiteSpace())
return true;
Node* currElement = curr->node();
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 (renderer()->style()->htmlHacks() || !renderer()->shouldPaintWithinRoot(paintInfo) ||
renderer()->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 = renderer()->style(m_firstLine);
int deco = parent() ? styleToUse->textDecoration() : styleToUse->textDecorationsInEffect();
if (deco != TDNONE &&
((!paintedChildren && ((deco & UNDERLINE) || (deco & OVERLINE))) || (paintedChildren && (deco & LINE_THROUGH))) &&
shouldDrawTextDecoration(renderer())) {
int x = m_x + borderLeft() + paddingLeft();
int w = m_width - (borderLeft() + paddingLeft() + borderRight() + paddingRight());
RootInlineBox* rootLine = root();
if (rootLine->ellipsisBox()) {
int ellipsisX = m_x + rootLine->ellipsisBox()->x();
int ellipsisWidth = rootLine->ellipsisBox()->width();
bool ltr = renderer()->style()->direction() == LTR;
if (rootLine == this) {
// Trim w and x so that the underline isn't drawn underneath the ellipsis.
// ltr: is our right edge farther right than the right edge of the ellipsis.
// rtl: is the left edge of our box farther left than the left edge of the ellipsis.
bool ltrTruncation = ltr && (x + w >= ellipsisX + ellipsisWidth);
bool rtlTruncation = !ltr && (x <= ellipsisX + ellipsisWidth);
if (ltrTruncation)
w -= (x + w) - (ellipsisX + ellipsisWidth);
else if (rtlTruncation) {
int dx = m_x - ((ellipsisX - m_x) + ellipsisWidth);
tx -= dx;
w += dx;
}
} else {
bool ltrPastEllipsis = ltr && x >= ellipsisX;
bool rtlPastEllipsis = !ltr && (x + w) <= (ellipsisX + ellipsisWidth);
if (ltrPastEllipsis || rtlPastEllipsis)
return;
bool ltrTruncation = ltr && x + w >= ellipsisX;
bool rtlTruncation = !ltr && x <= ellipsisX;
if (ltrTruncation)
w -= (x + w - ellipsisX);
else if (rtlTruncation) {
int dx = m_x - ((ellipsisX - m_x) + ellipsisWidth);
tx -= dx;
w += dx;
}
}
}
// We must have child boxes and have decorations defined.
tx += borderLeft() + paddingLeft();
Color underline, overline, linethrough;
underline = overline = linethrough = styleToUse->color();
if (!parent())
renderer()->getTextDecorationColors(deco, underline, overline, linethrough);
bool isPrinting = renderer()->document()->printing();
context->setStrokeThickness(1.0f); // FIXME: We should improve this rule and not always just assume 1.
bool paintUnderline = deco & UNDERLINE && !paintedChildren;
bool paintOverline = deco & OVERLINE && !paintedChildren;
bool paintLineThrough = deco & LINE_THROUGH && paintedChildren;
bool linesAreOpaque = !isPrinting && (!paintUnderline || underline.alpha() == 255) && (!paintOverline || overline.alpha() == 255) && (!paintLineThrough || linethrough.alpha() == 255);
int baselinePos = renderer()->style(m_firstLine)->font().ascent();
if (!isRootInlineBox())
baselinePos += borderTop() + paddingTop();
bool setClip = false;
int extraOffset = 0;
ShadowData* shadow = styleToUse->textShadow();
if (!linesAreOpaque && shadow && shadow->next) {
IntRect clipRect(tx, ty, w, baselinePos + 2);
for (ShadowData* s = shadow; s; s = s->next) {
IntRect shadowRect(tx, ty, w, baselinePos + 2);
shadowRect.inflate(s->blur);
shadowRect.move(s->x, s->y);
clipRect.unite(shadowRect);
extraOffset = max(extraOffset, max(0, s->y) + s->blur);
}
context->save();
context->clip(clipRect);
extraOffset += baselinePos + 2;
ty += extraOffset;
setClip = true;
}
ColorSpace colorSpace = renderer()->style()->colorSpace();
bool setShadow = false;
do {
if (shadow) {
if (!shadow->next) {
// The last set of lines paints normally inside the clip.
ty -= extraOffset;
extraOffset = 0;
}
context->setShadow(IntSize(shadow->x, shadow->y - extraOffset), shadow->blur, shadow->color, colorSpace);
setShadow = true;
shadow = shadow->next;
}
if (paintUnderline) {
context->setStrokeColor(underline, colorSpace);
context->setStrokeStyle(SolidStroke);
// Leave one pixel of white between the baseline and the underline.
context->drawLineForText(IntPoint(tx, ty + baselinePos + 1), w, isPrinting);
}
if (paintOverline) {
context->setStrokeColor(overline, colorSpace);
context->setStrokeStyle(SolidStroke);
context->drawLineForText(IntPoint(tx, ty), w, isPrinting);
}
if (paintLineThrough) {
context->setStrokeColor(linethrough, colorSpace);
context->setStrokeStyle(SolidStroke);
context->drawLineForText(IntPoint(tx, ty + 2 * baselinePos / 3), w, isPrinting);
}
} while (shadow);
if (setClip)
context->restore();
else if (setShadow)
context->clearShadow();
}
}
InlineBox* InlineFlowBox::firstLeafChild() const
{
InlineBox* leaf = 0;
for (InlineBox* child = firstChild(); child && !leaf; child = child->nextOnLine())
leaf = child->isLeaf() ? child : static_cast<InlineFlowBox*>(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<InlineFlowBox*>(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->width();
box = box->nextOnLine();
}
else {
visibleRightEdge -= box->width();
box = box->prevOnLine();
}
}
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