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tdelibs/khtml/rendering/render_line.cpp

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/**
* This file is part of the html renderer for KDE.
*
* Copyright (C) 2003-2006 Apple Computer, Inc.
* (C) 2006 Germain Garand (germain@ebooksfrance.org)
*
* 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 <kdebug.h>
#include <assert.h>
#include <tqpainter.h>
#include <kglobal.h>
#include "rendering/render_flow.h"
#include "rendering/render_text.h"
#include "rendering/render_table.h"
#include "rendering/render_inline.h"
#include "rendering/render_block.h"
#include "rendering/render_arena.h"
#include "rendering/render_line.h"
#include "xml/dom_nodeimpl.h"
#include "xml/dom_docimpl.h"
#include "html/html_formimpl.h"
#include "misc/htmltags.h"
#include "khtmlview.h"
using namespace DOM;
using namespace khtml;
#ifndef NDEBUG
static bool inInlineBoxDetach;
#endif
class khtml::EllipsisBox : public InlineBox
{
public:
EllipsisBox(RenderObject* obj, const DOM::DOMString& ellipsisStr, InlineFlowBox* p,
int w, int y, int h, int b, bool firstLine, InlineBox* markupBox)
:InlineBox(obj), m_str(ellipsisStr) {
m_parent = p;
m_width = w;
m_y = y;
m_height = h;
m_baseline = b;
m_firstLine = firstLine;
m_constructed = true;
m_markupBox = markupBox;
}
void paint(RenderObject::PaintInfo& i, int _tx, int _ty);
bool nodeAtPoint(RenderObject::NodeInfo& info, int _x, int _y, int _tx, int _ty);
private:
DOM::DOMString m_str;
InlineBox* m_markupBox;
};
void InlineBox::detach(RenderArena* renderArena)
{
if (m_parent)
m_parent->removeFromLine(this);
#ifndef NDEBUG
inInlineBoxDetach = true;
#endif
delete this;
#ifndef NDEBUG
inInlineBoxDetach = false;
#endif
// Recover the size left there for us by operator delete and free the memory.
renderArena->free(*(size_t *)this, this);
}
void* InlineBox::operator new(size_t sz, RenderArena* renderArena) throw()
{
return renderArena->allocate(sz);
}
void InlineBox::operator delete(void* ptr, size_t sz)
{
assert(inInlineBoxDetach);
// Stash size where detach can tqfind it.
*(size_t *)ptr = sz;
}
static bool needsOutlinePhaseRepaint(RenderObject* o, RenderObject::PaintInfo& i, int tx, int ty) {
if (o->style()->outlineWidth() <= 0)
return false;
TQRect r(tx+o->xPos(),ty+o->yPos(),o->width(),o->height());
if (r.intersects(i.r))
return false;
r.addCoords(-o->style()->outlineSize(),
-o->style()->outlineSize(),
o->style()->outlineSize(),
o->style()->outlineSize());
if (!r.intersects(i.r))
return false;
return true;
}
void InlineBox::paint(RenderObject::PaintInfo& i, int tx, int ty)
{
if ( i.phase == PaintActionOutline && !needsOutlinePhaseRepaint(object(), i, tx, ty) )
return;
// Paint all phases of tqreplaced elements atomically, as though the tqreplaced element established its
// own stacking context. (See Appendix E.2, section 6.4 on inline block/table elements in the CSS2.1
// specification.)
bool paintSelectionOnly = i.phase == PaintActionSelection;
RenderObject::PaintInfo info(i.p, i.r, paintSelectionOnly ? i.phase : PaintActionElementBackground);
object()->paint(info, tx, ty);
if (!paintSelectionOnly) {
info.phase = PaintActionChildBackgrounds;
object()->paint(info, tx, ty);
info.phase = PaintActionFloat;
object()->paint(info, tx, ty);
info.phase = PaintActionForeground;
object()->paint(info, tx, ty);
info.phase = PaintActionOutline;
object()->paint(info, tx, ty);
}
}
bool InlineBox::nodeAtPoint(RenderObject::NodeInfo& i, int x, int y, int tx, int ty)
{
// Hit test all phases of tqreplaced elements atomically, as though the tqreplaced element established its
// own stacking context. (See Appendix E.2, section 6.4 on inline block/table elements in the CSS2.1
// specification.)
bool inside = false;
return object()->nodeAtPoint(i, x, y, tx, ty, HitTestAll, inside); // ### port hitTest
}
RootInlineBox* InlineBox::root()
{
if (m_parent)
return m_parent->root();
return static_cast<RootInlineBox*>(this);
}
InlineFlowBox::~InlineFlowBox()
{
/* If we're destroyed, set the children free, and break their links */
while (m_firstChild)
removeFromLine(m_firstChild);
}
void InlineFlowBox::removeFromLine(InlineBox *child)
{
if (child == m_firstChild) {
m_firstChild = child->nextOnLine();
}
if (child == m_lastChild) {
m_lastChild = child->prevOnLine();
}
if (child->nextOnLine()) {
child->nextOnLine()->m_prev = child->prevOnLine();
}
if (child->prevOnLine()) {
child->prevOnLine()->m_next = child->nextOnLine();
}
child->setParent(0);
}
bool InlineBox::canAccommodateEllipsisBox(bool ltr, int blockEdge, int ellipsisWidth)
{
// Non-tqreplaced elements can always accommodate an ellipsis.
if (!m_object || !m_object->isReplaced())
return true;
TQRect boxRect(m_x, 0, m_width, 10);
TQRect ellipsisRect(ltr ? blockEdge - ellipsisWidth : blockEdge, 0, ellipsisWidth, 10);
return !(boxRect.intersects(ellipsisRect));
}
int InlineBox::placeEllipsisBox(bool /*ltr*/, int /*blockEdge*/, int /*ellipsisWidth*/, bool&)
{
// Use -1 to mean "we didn't set the position."
return -1;
}
int InlineFlowBox::marginLeft() const
{
if (!includeLeftEdge())
return 0;
RenderStyle* cstyle = object()->style();
Length margin = cstyle->marginLeft();
if (!margin.isVariable())
return (margin.isFixed() ? margin.value() : object()->marginLeft());
return 0;
}
int InlineFlowBox::marginRight() const
{
if (!includeRightEdge())
return 0;
RenderStyle* cstyle = object()->style();
Length margin = cstyle->marginRight();
if (!margin.isVariable())
return (margin.isFixed() ? margin.value() : object()->marginRight());
return 0;
}
int InlineFlowBox::marginBorderPaddingLeft() const
{
return marginLeft() + borderLeft() + paddingLeft();
}
int InlineFlowBox::marginBorderPaddingRight() const
{
return marginRight() + borderRight() + paddingRight();
}
int InlineFlowBox::getFlowSpacingWidth() const
{
int totWidth = marginBorderPaddingLeft() + marginBorderPaddingRight();
for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) {
if (curr->isInlineFlowBox())
totWidth += static_cast<InlineFlowBox*>(curr)->getFlowSpacingWidth();
}
return totWidth;
}
bool InlineFlowBox::nextOnLineExists()
{
if (!parent())
return false;
if (nextOnLine())
return true;
return parent()->nextOnLineExists();
}
bool InlineFlowBox::prevOnLineExists()
{
if (!parent())
return false;
if (prevOnLine())
return true;
return parent()->prevOnLineExists();
}
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)
{
// Set our x position.
setXPos(x);
int startX = x;
x += borderLeft() + paddingLeft();
for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) {
if (curr->object()->isText()) {
InlineTextBox* text = static_cast<InlineTextBox*>(curr);
text->setXPos(x);
x += curr->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 by walking up to the root line box).
InlineBox* root = this;
while (!root->isRootInlineBox())
root = root->parent();
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);
x += flow->marginLeft();
x = flow->placeBoxesHorizontally(x);
x += flow->marginRight();
}
else {
x += curr->object()->marginLeft();
curr->setXPos(x);
x += curr->width() + curr->object()->marginRight();
}
}
}
x += borderRight() + paddingRight();
setWidth(x-startX);
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.
RenderObject* curr = object();
while (curr && !curr->element())
curr = curr->container();
bool strictMode = (curr && curr->element()->getDocument()->inStrictMode());
computeLogicalBoxHeights(maxPositionTop, maxPositionBottom, maxAscent, maxDescent, strictMode);
if (maxAscent + maxDescent < kMax(maxPositionTop, maxPositionBottom))
adjustMaxAscentAndDescent(maxAscent, maxDescent, maxPositionTop, maxPositionBottom);
int maxHeight = maxAscent + maxDescent;
int topPosition = heightOfBlock;
int bottomPosition = heightOfBlock;
placeBoxesVertically(heightOfBlock, maxHeight, maxAscent, strictMode, topPosition, bottomPosition);
setOverflowPositions(topPosition, bottomPosition);
// 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
// see khtmltests/rendering/html_align.html
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 >= kMax( 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));
bool isTableCell = object()->isTableCell();
if (isTableCell) {
RenderTableCell* tableCell = static_cast<RenderTableCell*>(object());
setBaseline(tableCell->RenderBlock::baselinePosition(m_firstLine));
}
else
setBaseline(object()->baselinePosition(m_firstLine));
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)
{
if (isRootInlineBox()) {
setYPos(y + maxAscent - baseline());// Place our root box.
// CSS2: 10.8.1 - line-height on the block level element specifies the *minimum*
// height of the generated line box
if (hasTextChildren() && maxHeight < object()->lineHeight(m_firstLine))
maxHeight = object()->lineHeight(m_firstLine);
}
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);
bool childAffectsTopBottomPos = true;
if (curr->yPos() == PositionTop)
curr->setYPos(y);
else if (curr->yPos() == PositionBottom)
curr->setYPos(y + maxHeight - curr->height());
else {
if (!strictMode && !curr->hasTextDescendant())
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->isInlineTextBox() || curr->isInlineFlowBox()) {
const TQFontMetrics &fm = curr->object()->fontMetrics( m_firstLine );
#ifdef APPLE_CHANGES
newBaseline = fm.ascent();
newY += curr->baseline() - newBaseline;
newHeight = newBaseline+fm.descent();
#else
// only adjust if the leading delta is superior to the font's natural leading
if ( kAbs(fm.ascent() - curr->baseline()) > fm.leading()/2 ) {
int ascent = fm.ascent()+fm.leading()/2;
newBaseline = ascent;
newY += curr->baseline() - newBaseline;
newHeight = fm.lineSpacing();
}
#endif
for (ShadowData* shadow = curr->object()->style()->textShadow(); shadow; shadow = shadow->next) {
overflowTop = kMin(overflowTop, shadow->y - shadow->blur);
overflowBottom = kMax(overflowBottom, shadow->y + shadow->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 {
newY += curr->object()->marginTop();
newHeight = curr->height() - (curr->object()->marginTop() + curr->object()->marginBottom());
overflowTop = curr->object()->overflowTop();
overflowBottom = curr->object()->overflowHeight() - newHeight;
}
curr->setYPos(newY);
curr->setHeight(newHeight);
curr->setBaseline(newBaseline);
if (childAffectsTopBottomPos) {
topPosition = kMin(topPosition, newY + overflowTop);
bottomPosition = kMax(bottomPosition, newY + newHeight + overflowBottom);
}
}
if (isRootInlineBox()) {
const TQFontMetrics &fm = object()->fontMetrics( m_firstLine );
#ifdef APPLE_CHANGES
setHeight(fm.ascent()+fm.descent());
setYPos(yPos() + baseline() - fm.ascent());
setBaseline(fm.ascent());
#else
if ( kAbs(fm.ascent() - baseline()) > fm.leading()/2 ) {
int ascent = fm.ascent()+fm.leading()/2;
setHeight(fm.lineSpacing());
setYPos(yPos() + baseline() - ascent);
setBaseline(ascent);
}
#endif
if (hasTextDescendant() || strictMode) {
if (yPos() < topPosition)
topPosition = yPos();
if (yPos() + height() > bottomPosition)
bottomPosition = 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 (!hasTextDescendant()) {
if (yPos() < topPos)
setYPos(topPos);
if (yPos() + height() > bottomPos)
setHeight(bottomPos - yPos());
if (baseline() > height())
setBaseline(height());
}
}
bool InlineFlowBox::nodeAtPoint(RenderObject::NodeInfo& i, int x, int y, int tx, int ty)
{
// Check children first.
for (InlineBox* curr = lastChild(); curr; curr = curr->prevOnLine()) {
if (!curr->object()->layer() && curr->nodeAtPoint(i, x, y, tx, ty)) {
object()->setInnerNode(i);
return true;
}
}
// Now check ourselves.
TQRect rect(tx + m_x, ty + m_y, m_width, m_height);
if (object()->style()->visibility() == VISIBLE && rect.tqcontains(x, y)) {
object()->setInnerNode(i);
return true;
}
return false;
}
void InlineFlowBox::paint(RenderObject::PaintInfo& i, int tx, int ty)
{
bool intersectsDamageRect = true;
int xPos = tx + m_x - object()->maximalOutlineSize(i.phase);
int w = width() + 2 * object()->maximalOutlineSize(i.phase);
if ((xPos >= i.r.x() + i.r.width()) || (xPos + w <= i.r.x()))
intersectsDamageRect = false;
if (intersectsDamageRect) {
if (i.phase == PaintActionOutline) {
// Add ourselves to the paint info struct's list of inlines that need to paint their
// outlines.
if (object()->style()->visibility() == VISIBLE && object()->style()->outlineWidth() > 0 &&
!object()->isInlineContinuation() && !isRootInlineBox()) {
if (!i.outlineObjects)
i.outlineObjects = new TQValueList<RenderFlow*>;
i.outlineObjects->append(static_cast<RenderFlow*>(object()));
}
}
else {
// 1. Paint our background and border.
paintBackgroundAndBorder(i, tx, ty);
// 2. Paint our underline and overline.
paintDecorations(i, tx, ty, false);
}
}
// 3. Paint our children.
for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) {
if (!curr->object()->layer())
curr->paint(i, tx, ty);
}
// 4. Paint our strike-through
if (intersectsDamageRect && i.phase != PaintActionOutline)
paintDecorations(i, tx, ty, true);
}
void InlineFlowBox::paintBackgrounds(TQPainter* p, const TQColor& 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(TQPainter* p, const TQColor& c, const BackgroundLayer* bgLayer,
int my, int mh, int _tx, int _ty, int w, int h)
{
CachedImage* bg = bgLayer->backgroundImage();
bool hasBackgroundImage = bg && (bg->pixmap_size() == bg->valid_rect().size()) &&
!bg->isTransparent() && !bg->isErrorImage();
if (!hasBackgroundImage || (!prevLineBox() && !nextLineBox()) || !parent())
object()->paintBackgroundExtended(p, c, bgLayer, my, mh, _tx, _ty, w, h, borderLeft(), borderRight(), paddingLeft(), paddingRight());
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();
p->save();
p->setClipRect(TQRect(_tx, _ty, width(), height()), TQPainter::CoordPainter);
object()->paintBackgroundExtended(p, c, bgLayer, my, mh, startX, _ty,
totalWidth, h, borderLeft(), borderRight(), paddingLeft(), paddingRight());
p->restore();
}
}
void InlineFlowBox::paintBackgroundAndBorder(RenderObject::PaintInfo& pI, int _tx, int _ty)
{
if (object()->style()->visibility() != VISIBLE || pI.phase != PaintActionForeground)
return;
// Move x/y to our coordinates.
_tx += m_x;
_ty += m_y;
int w = width();
int h = height();
int my = kMax(_ty, pI.r.y());
int mh;
if (_ty<pI.r.y())
mh= kMax(0,h-(pI.r.y()-_ty));
else
mh = kMin(pI.r.height(),h);
// 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()->shouldPaintBackgroundOrBorder())) {
TQColor c = styleToUse->backgroundColor();
paintBackgrounds(pI.p, 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())
object()->paintBorder(pI.p, _tx, _ty, w, h, object()->style(), includeLeftEdge(), includeRightEdge());
}
}
static bool shouldDrawDecoration(RenderObject* obj)
{
bool shouldDraw = false;
for (RenderObject* curr = obj->firstChild();
curr; curr = curr->nextSibling()) {
if (curr->isInlineFlow()) {
shouldDraw = true;
break;
}
else if (curr->isText() && !curr->isBR() && (curr->style()->preserveWS() ||
!curr->element() || !curr->element()->tqcontainsOnlyWhitespace())) {
shouldDraw = true;
break;
}
}
return shouldDraw;
}
void InlineFlowBox::paintDecorations(RenderObject::PaintInfo& pI, int _tx, int _ty, bool paintedChildren)
{
// Now paint our text decorations. 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()->style()->visibility() != VISIBLE)
return;
_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))) &&
shouldDrawDecoration(object())) {
// We must have child boxes and have decorations defined.
_tx += borderLeft() + paddingLeft();
int w = m_width - (borderLeft() + paddingLeft() + borderRight() + paddingRight());
if ( !w )
return;
const TQFontMetrics &fm = object()->fontMetrics( m_firstLine );
// thick lines on small fonts look ugly
int thickness = fm.height() > 20 ? fm.lineWidth() : 1;
TQColor underline, overline, linethrough;
underline = overline = linethrough = styleToUse->color();
if (!parent())
object()->getTextDecorationColors(deco, underline, overline, linethrough);
if (styleToUse->font() != pI.p->font())
pI.p->setFont(styleToUse->font());
if (deco & UNDERLINE && !paintedChildren) {
int underlineOffset = ( fm.height() + m_baseline ) / 2;
if (underlineOffset <= m_baseline) underlineOffset = m_baseline+1;
pI.p->fillRect(_tx, _ty + underlineOffset, w, thickness, underline );
}
if (deco & OVERLINE && !paintedChildren) {
pI.p->fillRect(_tx, _ty, w, thickness, overline );
}
if (deco & LINE_THROUGH && paintedChildren) {
pI.p->fillRect(_tx, _ty + 2*m_baseline/3, w, thickness, linethrough );
}
}
}
bool InlineFlowBox::canAccommodateEllipsisBox(bool ltr, int blockEdge, int ellipsisWidth)
{
for (InlineBox *box = firstChild(); box; box = box->nextOnLine()) {
if (!box->canAccommodateEllipsisBox(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();
}
void EllipsisBox::paint(RenderObject::PaintInfo& i, int _tx, int _ty)
{
TQPainter* p = i.p;
RenderStyle* _style = m_firstLine ? m_object->style(true) : m_object->style();
if (_style->font() != p->font())
p->setFont(_style->font());
const Font* font = &_style->htmlFont();
TQColor textColor = _style->color();
if (textColor != p->pen().color())
p->setPen(textColor);
/*
bool setShadow = false;
if (_style->textShadow()) {
p->setShadow(_style->textShadow()->x, _style->textShadow()->y,
_style->textShadow()->blur, _style->textShadow()->color);
setShadow = true;
}*/
const DOMString& str = m_str.string();
font->drawText(p, m_x + _tx,
m_y + _ty + m_baseline,
(str.implementation())->s,
str.length(), 0, str.length(),
0,
TQPainter::LTR, _style->visuallyOrdered());
/*
if (setShadow)
p->clearShadow();
*/
if (m_markupBox) {
// Paint the markup box
_tx += m_x + m_width - m_markupBox->xPos();
_ty += m_y + m_baseline - (m_markupBox->yPos() + m_markupBox->baseline());
m_markupBox->object()->paint(i, _tx, _ty);
}
}
bool EllipsisBox::nodeAtPoint(RenderObject::NodeInfo& info, int _x, int _y, int _tx, int _ty)
{
// Hit test the markup box.
if (m_markupBox) {
_tx += m_x + m_width - m_markupBox->xPos();
_ty += m_y + m_baseline - (m_markupBox->yPos() + m_markupBox->baseline());
if (m_markupBox->nodeAtPoint(info, _x, _y, _tx, _ty)) {
object()->setInnerNode(info);
return true;
}
}
TQRect rect(_tx + m_x, _ty + m_y, m_width, m_height);
if (object()->style()->visibility() == VISIBLE && rect.tqcontains(_x, _y)) {
object()->setInnerNode(info);
return true;
}
return false;
}
void RootInlineBox::detach(RenderArena* arena)
{
detachEllipsisBox(arena);
InlineFlowBox::detach(arena);
}
void RootInlineBox::detachEllipsisBox(RenderArena* arena)
{
if (m_ellipsisBox) {
m_ellipsisBox->detach(arena);
m_ellipsisBox = 0;
}
}
void RootInlineBox::clearTruncation()
{
if (m_ellipsisBox) {
detachEllipsisBox(m_object->renderArena());
InlineFlowBox::clearTruncation();
}
}
bool RootInlineBox::canAccommodateEllipsis(bool ltr, int blockEdge, int lineBoxEdge, int ellipsisWidth)
{
// First sanity-check the unoverflowed width of the whole line to see if there is sufficient room.
int delta = ltr ? lineBoxEdge - blockEdge : blockEdge - lineBoxEdge;
if (width() - delta < ellipsisWidth)
return false;
// Next iterate over all the line boxes on the line. If we tqfind a tqreplaced element that intersects
// then we refuse to accommodate the ellipsis. Otherwise we're ok.
return InlineFlowBox::canAccommodateEllipsisBox(ltr, blockEdge, ellipsisWidth);
}
void RootInlineBox::placeEllipsis(const DOMString& ellipsisStr, bool ltr, int blockEdge, int ellipsisWidth, InlineBox* markupBox)
{
// Create an ellipsis box.
m_ellipsisBox = new (m_object->renderArena()) EllipsisBox(m_object, ellipsisStr, this,
ellipsisWidth - (markupBox ? markupBox->width() : 0),
yPos(), height(), baseline(), !prevRootBox(),
markupBox);
if (ltr && (xPos() + width() + ellipsisWidth) <= blockEdge) {
m_ellipsisBox->m_x = xPos() + width();
return;
}
// Now attempt to tqfind the nearest glyph horizontally and place just to the right (or left in RTL)
// of that glyph. Mark all of the objects that intersect the ellipsis box as not painting (as being
// truncated).
bool foundBox = false;
m_ellipsisBox->m_x = placeEllipsisBox(ltr, blockEdge, ellipsisWidth, foundBox);
}
int RootInlineBox::placeEllipsisBox(bool ltr, int blockEdge, int ellipsisWidth, bool& foundBox)
{
int result = InlineFlowBox::placeEllipsisBox(ltr, blockEdge, ellipsisWidth, foundBox);
if (result == -1)
result = ltr ? blockEdge - ellipsisWidth : blockEdge;
return result;
}
void RootInlineBox::paintEllipsisBox(RenderObject::PaintInfo& i, int _tx, int _ty) const
{
if (m_ellipsisBox)
m_ellipsisBox->paint(i, _tx, _ty);
}
void RootInlineBox::paint(RenderObject::PaintInfo& i, int tx, int ty)
{
InlineFlowBox::paint(i, tx, ty);
paintEllipsisBox(i, tx, ty);
}
bool RootInlineBox::nodeAtPoint(RenderObject::NodeInfo& i, int x, int y, int tx, int ty)
{
if (m_ellipsisBox && object()->style()->visibility() == VISIBLE) {
if (m_ellipsisBox->nodeAtPoint(i, x, y, tx, ty)) {
object()->setInnerNode(i);
return true;
}
}
return InlineFlowBox::nodeAtPoint(i, x, y, tx, ty);
}
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