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/*
* 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