From ce4a32fe52ef09d8f5ff1dd22c001110902b60a2 Mon Sep 17 00:00:00 2001 From: toma Date: Wed, 25 Nov 2009 17:56:58 +0000 Subject: Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features. BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da --- khtml/rendering/bidi.cpp | 2253 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 2253 insertions(+) create mode 100644 khtml/rendering/bidi.cpp (limited to 'khtml/rendering/bidi.cpp') diff --git a/khtml/rendering/bidi.cpp b/khtml/rendering/bidi.cpp new file mode 100644 index 000000000..a220641b2 --- /dev/null +++ b/khtml/rendering/bidi.cpp @@ -0,0 +1,2253 @@ +/** + * This file is part of the html renderer for KDE. + * + * Copyright (C) 2000-2003 Lars Knoll (knoll@kde.org) + * (C) 2003-2005 Apple Computer, Inc. + * (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com) + * + * 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 "rendering/bidi.h" +#include "rendering/break_lines.h" +#include "rendering/render_block.h" +#include "rendering/render_text.h" +#include "rendering/render_arena.h" +#include "rendering/render_layer.h" +#include "rendering/render_canvas.h" +#include "xml/dom_docimpl.h" + +#include "kdebug.h" +#include "qdatetime.h" +#include "qfontmetrics.h" + +#define BIDI_DEBUG 0 +//#define DEBUG_LINEBREAKS +//#define PAGE_DEBUG + +namespace khtml { + + +// an iterator which goes through a BidiParagraph +struct BidiIterator +{ + BidiIterator() : par(0), obj(0), pos(0) {} + BidiIterator(RenderBlock *_par, RenderObject *_obj, unsigned int _pos) : par(_par), obj(_obj), pos(_pos) {} + + void increment( BidiState &bidi ); + + bool atEnd() const; + + const QChar ¤t() const; + QChar::Direction direction() const; + + RenderBlock *par; + RenderObject *obj; + unsigned int pos; +}; + + +struct BidiStatus { + BidiStatus() : eor(QChar::DirON), lastStrong(QChar::DirON), last(QChar::DirON) {} + + QChar::Direction eor; + QChar::Direction lastStrong; + QChar::Direction last; +}; + +struct BidiState { + BidiState() : context(0) {} + + BidiIterator sor; + BidiIterator eor; + BidiIterator last; + BidiIterator current; + BidiContext *context; + BidiStatus status; +}; + +// Used to track a list of chained bidi runs. +static BidiRun* sFirstBidiRun; +static BidiRun* sLastBidiRun; +static int sBidiRunCount; +static BidiRun* sCompactFirstBidiRun; +static BidiRun* sCompactLastBidiRun; +static int sCompactBidiRunCount; +static bool sBuildingCompactRuns; + +// Midpoint globals. The goal is not to do any allocation when dealing with +// these midpoints, so we just keep an array around and never clear it. We track +// the number of items and position using the two other variables. +static QMemArray *smidpoints; +static uint sNumMidpoints; +static uint sCurrMidpoint; +static bool betweenMidpoints; + +static bool isLineEmpty = true; +static bool previousLineBrokeAtBR = true; +static QChar::Direction dir; +static bool adjustEmbedding; +static bool emptyRun = true; +static int numSpaces; + +static void embed( QChar::Direction d, BidiState &bidi ); +static void appendRun( BidiState &bidi ); + +static int getBPMWidth(int childValue, Length cssUnit) +{ + if (!cssUnit.isVariable()) + return (cssUnit.isFixed() ? cssUnit.value() : childValue); + return 0; +} + +static int getBorderPaddingMargin(RenderObject* child, bool endOfInline) +{ + RenderStyle* cstyle = child->style(); + int result = 0; + bool leftSide = (cstyle->direction() == LTR) ? !endOfInline : endOfInline; + result += getBPMWidth((leftSide ? child->marginLeft() : child->marginRight()), + (leftSide ? cstyle->marginLeft() : + cstyle->marginRight())); + result += getBPMWidth((leftSide ? child->paddingLeft() : child->paddingRight()), + (leftSide ? cstyle->paddingLeft() : + cstyle->paddingRight())); + result += leftSide ? child->borderLeft() : child->borderRight(); + return result; +} + +static int inlineWidth(RenderObject* child, bool start = true, bool end = true) +{ + int extraWidth = 0; + RenderObject* parent = child->parent(); + while (parent->isInline() && !parent->isInlineBlockOrInlineTable()) { + if (start && parent->firstChild() == child) + extraWidth += getBorderPaddingMargin(parent, false); + if (end && parent->lastChild() == child) + extraWidth += getBorderPaddingMargin(parent, true); + child = parent; + parent = child->parent(); + } + return extraWidth; +} + +#ifndef NDEBUG +static bool inBidiRunDetach; +#endif + +void BidiRun::detach(RenderArena* renderArena) +{ +#ifndef NDEBUG + inBidiRunDetach = true; +#endif + delete this; +#ifndef NDEBUG + inBidiRunDetach = false; +#endif + + // Recover the size left there for us by operator delete and free the memory. + renderArena->free(*(size_t *)this, this); +} + +void* BidiRun::operator new(size_t sz, RenderArena* renderArena) throw() +{ + return renderArena->allocate(sz); +} + +void BidiRun::operator delete(void* ptr, size_t sz) +{ + assert(inBidiRunDetach); + + // Stash size where detach can find it. + *(size_t*)ptr = sz; +} + +static void deleteBidiRuns(RenderArena* arena) +{ + if (!sFirstBidiRun) + return; + + BidiRun* curr = sFirstBidiRun; + while (curr) { + BidiRun* s = curr->nextRun; + curr->detach(arena); + curr = s; + } + + sFirstBidiRun = 0; + sLastBidiRun = 0; + sBidiRunCount = 0; +} + +// --------------------------------------------------------------------- + +/* a small helper class used internally to resolve Bidi embedding levels. + Each line of text caches the embedding level at the start of the line for faster + relayouting +*/ +BidiContext::BidiContext(unsigned char l, QChar::Direction e, BidiContext *p, bool o) + : level(l) , override(o), dir(e) +{ + parent = p; + if(p) { + p->ref(); + basicDir = p->basicDir; + } else + basicDir = e; + count = 0; +} + +BidiContext::~BidiContext() +{ + if(parent) parent->deref(); +} + +void BidiContext::ref() const +{ + count++; +} + +void BidiContext::deref() const +{ + count--; + if(count <= 0) delete this; +} + +// --------------------------------------------------------------------- + +inline bool operator==( const BidiIterator &it1, const BidiIterator &it2 ) +{ + if(it1.pos != it2.pos) return false; + if(it1.obj != it2.obj) return false; + return true; +} + +inline bool operator!=( const BidiIterator &it1, const BidiIterator &it2 ) +{ + if(it1.pos != it2.pos) return true; + if(it1.obj != it2.obj) return true; + return false; +} + +static inline RenderObject *Bidinext(RenderObject *par, RenderObject *current, BidiState &bidi, + bool skipInlines = true) +{ + RenderObject *next = 0; + + while(current != 0) + { + //kdDebug( 6040 ) << "current = " << current << endl; + if (!current->isFloating() && !current->isReplaced() && !current->isPositioned()) { + next = current->firstChild(); + if ( next && adjustEmbedding ) { + EUnicodeBidi ub = next->style()->unicodeBidi(); + if ( ub != UBNormal && !emptyRun ) { + EDirection dir = next->style()->direction(); + QChar::Direction d = ( ub == Embed ? ( dir == RTL ? QChar::DirRLE : QChar::DirLRE ) + : ( dir == RTL ? QChar::DirRLO : QChar::DirLRO ) ); + embed( d, bidi ); + } + } + } + if (!next) { + while (current && current != par) { + next = current->nextSibling(); + if (next) break; + if ( adjustEmbedding && current->style()->unicodeBidi() != UBNormal && !emptyRun ) { + embed( QChar::DirPDF, bidi ); + } + current = current->parent(); + } + } + + if (!next) break; + + if (next->isText() || next->isBR() || next->isFloating() || next->isReplaced() || next->isPositioned() || next->isGlyph() + || ((!skipInlines || !next->firstChild()) // Always return EMPTY inlines. + && next->isInlineFlow())) + break; + current = next; + } + return next; +} + +static RenderObject *first( RenderObject *par, BidiState &bidi, bool skipInlines = true ) +{ + if(!par->firstChild()) return 0; + RenderObject *o = par->firstChild(); + + if (o->isInlineFlow()) { + if (skipInlines && o->firstChild()) + o = Bidinext( par, o, bidi, skipInlines ); + else + return o; // Never skip empty inlines. + } + + if (o && !o->isText() && !o->isBR() && !o->isReplaced() && !o->isFloating() && !o->isPositioned() && !o->isGlyph()) + o = Bidinext( par, o, bidi, skipInlines ); + return o; +} + +inline void BidiIterator::increment (BidiState &bidi) +{ + if(!obj) return; + if(obj->isText()) { + pos++; + if(pos >= static_cast(obj)->stringLength()) { + obj = Bidinext( par, obj, bidi ); + pos = 0; + } + } else { + obj = Bidinext( par, obj, bidi ); + pos = 0; + } +} + +inline bool BidiIterator::atEnd() const +{ + if(!obj) return true; + return false; +} + +const QChar &BidiIterator::current() const +{ + static QChar nonBreakingSpace(0xA0); + + if (!obj || !obj->isText()) + return nonBreakingSpace; + + RenderText* text = static_cast(obj); + if (!text->text()) + return nonBreakingSpace; + + return text->text()[pos]; +} + +inline QChar::Direction BidiIterator::direction() const +{ + if(!obj || !obj->isText() ) return QChar::DirON; + + RenderText *renderTxt = static_cast( obj ); + if ( pos >= renderTxt->stringLength() ) + return QChar::DirON; + return renderTxt->text()[pos].direction(); +} + +// ------------------------------------------------------------------------------------------------- + +static void addRun(BidiRun* bidiRun) +{ + if (!sFirstBidiRun) + sFirstBidiRun = sLastBidiRun = bidiRun; + else { + sLastBidiRun->nextRun = bidiRun; + sLastBidiRun = bidiRun; + } + sBidiRunCount++; + bidiRun->compact = sBuildingCompactRuns; + + // Compute the number of spaces in this run, + if (bidiRun->obj && bidiRun->obj->isText()) { + RenderText* text = static_cast(bidiRun->obj); + if (text->text()) { + for (int i = bidiRun->start; i < bidiRun->stop; i++) { + const QChar c = text->text()[i]; + if (c.category() == QChar::Separator_Space || c == '\n') + numSpaces++; + } + } + } +} + +static void reverseRuns(int start, int end) +{ + if (start >= end) + return; + + assert(start >= 0 && end < sBidiRunCount); + + // Get the item before the start of the runs to reverse and put it in + // |beforeStart|. |curr| should point to the first run to reverse. + BidiRun* curr = sFirstBidiRun; + BidiRun* beforeStart = 0; + int i = 0; + while (i < start) { + i++; + beforeStart = curr; + curr = curr->nextRun; + } + + BidiRun* startRun = curr; + while (i < end) { + i++; + curr = curr->nextRun; + } + BidiRun* endRun = curr; + BidiRun* afterEnd = curr->nextRun; + + i = start; + curr = startRun; + BidiRun* newNext = afterEnd; + while (i <= end) { + // Do the reversal. + BidiRun* next = curr->nextRun; + curr->nextRun = newNext; + newNext = curr; + curr = next; + i++; + } + + // Now hook up beforeStart and afterEnd to the newStart and newEnd. + if (beforeStart) + beforeStart->nextRun = endRun; + else + sFirstBidiRun = endRun; + + startRun->nextRun = afterEnd; + if (!afterEnd) + sLastBidiRun = startRun; +} + +static void chopMidpointsAt(RenderObject* obj, uint pos) +{ + if (!sNumMidpoints) return; + BidiIterator* midpoints = smidpoints->data(); + for (uint i = 0; i < sNumMidpoints; i++) { + const BidiIterator& point = midpoints[i]; + if (point.obj == obj && point.pos == pos) { + sNumMidpoints = i; + break; + } + } +} + +static void checkMidpoints(BidiIterator& lBreak, BidiState &bidi) +{ + // Check to see if our last midpoint is a start point beyond the line break. If so, + // shave it off the list, and shave off a trailing space if the previous end point isn't + // white-space: pre. + if (lBreak.obj && sNumMidpoints && sNumMidpoints%2 == 0) { + BidiIterator* midpoints = smidpoints->data(); + BidiIterator& endpoint = midpoints[sNumMidpoints-2]; + const BidiIterator& startpoint = midpoints[sNumMidpoints-1]; + BidiIterator currpoint = endpoint; + while (!currpoint.atEnd() && currpoint != startpoint && currpoint != lBreak) + currpoint.increment( bidi ); + if (currpoint == lBreak) { + // We hit the line break before the start point. Shave off the start point. + sNumMidpoints--; + if (!endpoint.obj->style()->preserveWS()) { + if (endpoint.obj->isText()) { + // Don't shave a character off the endpoint if it was from a soft hyphen. + RenderText* textObj = static_cast(endpoint.obj); + if (endpoint.pos+1 < textObj->length() && + textObj->text()[endpoint.pos+1].unicode() == SOFT_HYPHEN) + return; + } + endpoint.pos--; + } + } + } +} + +static void addMidpoint(const BidiIterator& midpoint) +{ + if (!smidpoints) + return; + + if (smidpoints->size() <= sNumMidpoints) + smidpoints->resize(sNumMidpoints+10); + + BidiIterator* midpoints = smidpoints->data(); + midpoints[sNumMidpoints++] = midpoint; +} + +static void appendRunsForObject(int start, int end, RenderObject* obj, BidiState &bidi) +{ + if (start > end || obj->isFloating() || + (obj->isPositioned() && !obj->hasStaticX() && !obj->hasStaticY())) + return; + + bool haveNextMidpoint = (smidpoints && sCurrMidpoint < sNumMidpoints); + BidiIterator nextMidpoint; + if (haveNextMidpoint) + nextMidpoint = smidpoints->at(sCurrMidpoint); + if (betweenMidpoints) { + if (!(haveNextMidpoint && nextMidpoint.obj == obj)) + return; + // This is a new start point. Stop ignoring objects and + // adjust our start. + betweenMidpoints = false; + start = nextMidpoint.pos; + sCurrMidpoint++; + if (start < end) + return appendRunsForObject(start, end, obj, bidi); + } + else { + if (!smidpoints || !haveNextMidpoint || (obj != nextMidpoint.obj)) { + addRun(new (obj->renderArena()) BidiRun(start, end, obj, bidi.context, dir)); + return; + } + + // An end midpoint has been encountered within our object. We + // need to go ahead and append a run with our endpoint. + if (int(nextMidpoint.pos+1) <= end) { + betweenMidpoints = true; + sCurrMidpoint++; + if (nextMidpoint.pos != UINT_MAX) { // UINT_MAX means stop at the object and don't include any of it. + addRun(new (obj->renderArena()) + BidiRun(start, nextMidpoint.pos+1, obj, bidi.context, dir)); + return appendRunsForObject(nextMidpoint.pos+1, end, obj, bidi); + } + } + else + addRun(new (obj->renderArena()) BidiRun(start, end, obj, bidi.context, dir)); + } +} + +static void appendRun( BidiState &bidi ) +{ + if ( emptyRun ) return; +#if BIDI_DEBUG > 1 + kdDebug(6041) << "appendRun: dir="<<(int)dir<length(), obj, bidi); + start = 0; + obj = Bidinext( bidi.sor.par, obj, bidi ); + } + if (obj) + appendRunsForObject(start, bidi.eor.pos+1, obj, bidi); + + bidi.eor.increment( bidi ); + bidi.sor = bidi.eor; + dir = QChar::DirON; + bidi.status.eor = QChar::DirON; + adjustEmbedding = b; +} + +static void embed( QChar::Direction d, BidiState &bidi ) +{ +#if BIDI_DEBUG > 1 + qDebug("*** embed dir=%d emptyrun=%d", d, emptyRun ); +#endif + bool b = adjustEmbedding ; + adjustEmbedding = false; + if ( d == QChar::DirPDF ) { + BidiContext *c = bidi.context->parent; + if (c) { + if ( bidi.eor != bidi.last ) { + appendRun( bidi ); + bidi.eor = bidi.last; + } + appendRun( bidi ); + emptyRun = true; + bidi.status.last = bidi.context->dir; + bidi.context->deref(); + bidi.context = c; + if(bidi.context->override) + dir = bidi.context->dir; + else + dir = QChar::DirON; + bidi.status.lastStrong = bidi.context->dir; + } + } else { + QChar::Direction runDir; + if( d == QChar::DirRLE || d == QChar::DirRLO ) + runDir = QChar::DirR; + else + runDir = QChar::DirL; + bool override; + if( d == QChar::DirLRO || d == QChar::DirRLO ) + override = true; + else + override = false; + + unsigned char level = bidi.context->level; + if ( runDir == QChar::DirR ) { + if(level%2) // we have an odd level + level += 2; + else + level++; + } else { + if(level%2) // we have an odd level + level++; + else + level += 2; + } + + if(level < 61) { + if ( bidi.eor != bidi.last ) { + appendRun( bidi ); + bidi.eor = bidi.last; + } + appendRun( bidi ); + emptyRun = true; + + bidi.context = new BidiContext(level, runDir, bidi.context, override); + bidi.context->ref(); + dir = runDir; + bidi.status.last = runDir; + bidi.status.lastStrong = runDir; + bidi.status.eor = runDir; + } + } + adjustEmbedding = b; +} + +InlineFlowBox* RenderBlock::createLineBoxes(RenderObject* obj) +{ + // See if we have an unconstructed line box for this object that is also + // the last item on the line. + KHTMLAssert(obj->isInlineFlow() || obj == this); + RenderFlow* flow = static_cast(obj); + + // Get the last box we made for this render object. + InlineFlowBox* box = flow->lastLineBox(); + + // If this box is constructed then it is from a previous line, and we need + // to make a new box for our line. If this box is unconstructed but it has + // something following it on the line, then we know we have to make a new box + // as well. In this situation our inline has actually been split in two on + // the same line (this can happen with very fancy language mixtures). + if (!box || box->isConstructed() || box->nextOnLine()) { + // We need to make a new box for this render object. Once + // made, we need to place it at the end of the current line. + InlineBox* newBox = obj->createInlineBox(false, obj == this); + KHTMLAssert(newBox->isInlineFlowBox()); + box = static_cast(newBox); + box->setFirstLineStyleBit(m_firstLine); + + // We have a new box. Append it to the inline box we get by constructing our + // parent. If we have hit the block itself, then |box| represents the root + // inline box for the line, and it doesn't have to be appended to any parent + // inline. + if (obj != this) { + InlineFlowBox* parentBox = createLineBoxes(obj->parent()); + parentBox->addToLine(box); + } + } + + return box; +} + +InlineFlowBox* RenderBlock::constructLine(const BidiIterator &/*start*/, const BidiIterator &end) +{ + if (!sFirstBidiRun) + return 0; // We had no runs. Don't make a root inline box at all. The line is empty. + + InlineFlowBox* parentBox = 0; + for (BidiRun* r = sFirstBidiRun; r; r = r->nextRun) { + // Create a box for our object. + r->box = r->obj->createInlineBox(r->obj->isPositioned(), false); + + // If we have no parent box yet, or if the run is not simply a sibling, + // then we need to construct inline boxes as necessary to properly enclose the + // run's inline box. + if (!parentBox || (parentBox->object() != r->obj->parent())) + // Create new inline boxes all the way back to the appropriate insertion point. + parentBox = createLineBoxes(r->obj->parent()); + + // Append the inline box to this line. + parentBox->addToLine(r->box); + } + + // We should have a root inline box. It should be unconstructed and + // be the last continuation of our line list. + KHTMLAssert(lastLineBox() && !lastLineBox()->isConstructed()); + + // Set bits on our inline flow boxes that indicate which sides should + // paint borders/margins/padding. This knowledge will ultimately be used when + // we determine the horizontal positions and widths of all the inline boxes on + // the line. + RenderObject* endObject = 0; + bool lastLine = !end.obj; + if (end.obj && end.pos == 0) + endObject = end.obj; + lastLineBox()->determineSpacingForFlowBoxes(lastLine, endObject); + + // Now mark the line boxes as being constructed. + lastLineBox()->setConstructed(); + + // Return the last line. + return lastLineBox(); +} + +void RenderBlock::computeHorizontalPositionsForLine(InlineFlowBox* lineBox, BidiState &bidi) +{ + // First determine our total width. + int totWidth = lineBox->getFlowSpacingWidth(); + BidiRun* r = 0; + for (r = sFirstBidiRun; r; r = r->nextRun) { + if (r->obj->isPositioned()) + continue; // Positioned objects are only participating to figure out their + // correct static x position. They have no effect on the width. + if (r->obj->isText()) + r->box->setWidth(static_cast(r->obj)->width(r->start, r->stop-r->start, m_firstLine)); + else if (!r->obj->isInlineFlow()) { + r->obj->calcWidth(); + r->box->setWidth(r->obj->width()); + totWidth += r->obj->marginLeft() + r->obj->marginRight(); + } + totWidth += r->box->width(); + } + + // Armed with the total width of the line (without justification), + // we now examine our text-align property in order to determine where to position the + // objects horizontally. The total width of the line can be increased if we end up + // justifying text. + int x = leftOffset(m_height); + int availableWidth = lineWidth(m_height); + switch(style()->textAlign()) { + case LEFT: + case KHTML_LEFT: + numSpaces = 0; + break; + case JUSTIFY: + if (numSpaces != 0 && !bidi.current.atEnd() && !bidi.current.obj->isBR() ) + break; + // fall through + case TAAUTO: + numSpaces = 0; + // for right to left fall through to right aligned + if (bidi.context->basicDir == QChar::DirL) + break; + case RIGHT: + case KHTML_RIGHT: + x += availableWidth - totWidth; + numSpaces = 0; + break; + case CENTER: + case KHTML_CENTER: + int xd = (availableWidth - totWidth)/2; + x += xd >0 ? xd : 0; + numSpaces = 0; + break; + } + + if (numSpaces > 0) { + for (r = sFirstBidiRun; r; r = r->nextRun) { + int spaceAdd = 0; + if (numSpaces > 0 && r->obj->isText()) { + // get the number of spaces in the run + int spaces = 0; + for ( int i = r->start; i < r->stop; i++ ) { + const QChar c = static_cast(r->obj)->text()[i]; + if (c.category() == QChar::Separator_Space || c == '\n') + spaces++; + } + + KHTMLAssert(spaces <= numSpaces); + + // Only justify text with white-space: normal. + if (r->obj->style()->whiteSpace() == NORMAL) { + spaceAdd = (availableWidth - totWidth)*spaces/numSpaces; + static_cast(r->box)->setSpaceAdd(spaceAdd); + totWidth += spaceAdd; + } + numSpaces -= spaces; + } + } + } + + // The widths of all runs are now known. We can now place every inline box (and + // compute accurate widths for the inline flow boxes). + int rightPos = lineBox->placeBoxesHorizontally(x); + if (rightPos > m_overflowWidth) + m_overflowWidth = rightPos; // FIXME: Work for rtl overflow also. + if (x < 0) + m_overflowLeft = kMin(m_overflowLeft, x); +} + +void RenderBlock::computeVerticalPositionsForLine(InlineFlowBox* lineBox) +{ + lineBox->verticallyAlignBoxes(m_height); +// lineBox->setBlockHeight(m_height); + + // Check for page-breaks + if (canvas()->pagedMode() && !lineBox->afterPageBreak()) + // If we get a page-break we might need to redo the line-break + if (clearLineOfPageBreaks(lineBox) && hasFloats()) return; + + // See if the line spilled out. If so set overflow height accordingly. + int bottomOfLine = lineBox->bottomOverflow(); + if (bottomOfLine > m_height && bottomOfLine > m_overflowHeight) + m_overflowHeight = bottomOfLine; + + bool beforeContent = true; + + // Now make sure we place replaced render objects correctly. + for (BidiRun* r = sFirstBidiRun; r; r = r->nextRun) { + + // For positioned placeholders, cache the static Y position an object with non-inline display would have. + // Either it is unchanged if it comes before any real linebox, or it must clear the current line (already accounted in m_height). + // This value will be picked up by position() if relevant. + if (r->obj->isPositioned()) + r->box->setYPos( beforeContent && r->obj->isBox() ? static_cast(r->obj)->staticY() : m_height ); + else if (beforeContent) + beforeContent = false; + + // Position is used to properly position both replaced elements and + // to update the static normal flow x/y of positioned elements. + r->obj->position(r->box, r->start, r->stop - r->start, r->level%2); + } +} + +bool RenderBlock::clearLineOfPageBreaks(InlineFlowBox* lineBox) +{ + bool doPageBreak = false; + // Check for physical page-breaks + int xpage = crossesPageBreak(lineBox->topOverflow(), lineBox->bottomOverflow()); + if (xpage) { +#ifdef PAGE_DEBUG + kdDebug(6040) << renderName() << " Line crosses to page " << xpage << endl; + kdDebug(6040) << renderName() << " at pos " << lineBox->yPos() << " height " << lineBox->height() << endl; +#endif + + doPageBreak = true; + // check page-break-inside + if (!style()->pageBreakInside()) { + if (parent()->canClear(this, PageBreakNormal)) { + setNeedsPageClear(true); + doPageBreak = false; + } +#ifdef PAGE_DEBUG + else + kdDebug(6040) << "Ignoring page-break-inside: avoid" << endl; +#endif + } + // check orphans + int orphans = 0; + InlineRunBox* box = lineBox->prevLineBox(); + while (box && orphans < style()->orphans()) { + orphans++; + box = box->prevLineBox(); + } + + if (orphans == 0) { + setNeedsPageClear(true); + doPageBreak = false; + } else + if (orphans < style()->orphans() ) { +#ifdef PAGE_DEBUG + kdDebug(6040) << "Orphans: " << orphans << endl; +#endif + // Orphans is a level 2 page-break rule and can be broken only + // if the break is physically required. + if (parent()->canClear(this, PageBreakHarder)) { + // move block instead + setNeedsPageClear(true); + doPageBreak = false; + } +#ifdef PAGE_DEBUG + else + kdDebug(6040) << "Ignoring violated orphans" << endl; +#endif + } + if (doPageBreak) { + int pTop = pageTopAfter(lineBox->yPos()); + + m_height = pTop; + lineBox->setAfterPageBreak(true); + lineBox->verticallyAlignBoxes(m_height); + if (lineBox->yPos() < pTop) { + // ### serious crap. render_line is sometimes placing lines too high + kdDebug(6040) << "page top overflow by repositioned line" << endl; + int heightIncrease = pTop - lineBox->yPos(); + m_height = pTop + heightIncrease; + lineBox->verticallyAlignBoxes(m_height); + } +#ifdef PAGE_DEBUG + kdDebug(6040) << "Cleared line " << lineBox->yPos() - oldYPos << "px" << endl; +#endif + setContainsPageBreak(true); + } + } + return doPageBreak; +} + +// collects one line of the paragraph and transforms it to visual order +void RenderBlock::bidiReorderLine(const BidiIterator &start, const BidiIterator &end, BidiState &bidi) +{ + if ( start == end ) { + if ( start.current() == '\n' ) { + m_height += lineHeight( m_firstLine ); + } + return; + } + +#if BIDI_DEBUG > 1 + kdDebug(6041) << "reordering Line from " << start.obj << "/" << start.pos << " to " << end.obj << "/" << end.pos << endl; +#endif + + sFirstBidiRun = 0; + sLastBidiRun = 0; + sBidiRunCount = 0; + + // context->ref(); + + dir = QChar::DirON; + emptyRun = true; + + numSpaces = 0; + + bidi.current = start; + bidi.last = bidi.current; + bool atEnd = false; + while( 1 ) { + + QChar::Direction dirCurrent; + if (atEnd) { + //kdDebug(6041) << "atEnd" << endl; + BidiContext *c = bidi.context; + if ( bidi.current.atEnd()) + while ( c->parent ) + c = c->parent; + dirCurrent = c->dir; + } else { + dirCurrent = bidi.current.direction(); + } + +#ifndef QT_NO_UNICODETABLES + +#if BIDI_DEBUG > 1 + kdDebug(6041) << "directions: dir=" << (int)dir << " current=" << (int)dirCurrent << " last=" << status.last << " eor=" << status.eor << " lastStrong=" << status.lastStrong << " embedding=" << (int)context->dir << " level =" << (int)context->level << endl; +#endif + + switch(dirCurrent) { + + // embedding and overrides (X1-X9 in the Bidi specs) + case QChar::DirRLE: + case QChar::DirLRE: + case QChar::DirRLO: + case QChar::DirLRO: + case QChar::DirPDF: + embed( dirCurrent, bidi ); + break; + + // strong types + case QChar::DirL: + if(dir == QChar::DirON) + dir = QChar::DirL; + switch(bidi.status.last) + { + case QChar::DirL: + bidi.eor = bidi.current; bidi.status.eor = QChar::DirL; break; + case QChar::DirR: + case QChar::DirAL: + case QChar::DirEN: + case QChar::DirAN: + appendRun( bidi ); + break; + case QChar::DirES: + case QChar::DirET: + case QChar::DirCS: + case QChar::DirBN: + case QChar::DirB: + case QChar::DirS: + case QChar::DirWS: + case QChar::DirON: + if( bidi.status.eor != QChar::DirL ) { + //last stuff takes embedding dir + if(bidi.context->dir == QChar::DirL || bidi.status.lastStrong == QChar::DirL) { + if ( bidi.status.eor != QChar::DirEN && bidi.status.eor != QChar::DirAN && bidi.status.eor != QChar::DirON ) + appendRun( bidi ); + dir = QChar::DirL; + bidi.eor = bidi.current; + bidi.status.eor = QChar::DirL; + } else { + if ( bidi.status.eor == QChar::DirEN || bidi.status.eor == QChar::DirAN ) + { + dir = bidi.status.eor; + appendRun( bidi ); + } + dir = QChar::DirR; + bidi.eor = bidi.last; + appendRun( bidi ); + dir = QChar::DirL; + bidi.status.eor = QChar::DirL; + } + } else { + bidi.eor = bidi.current; bidi.status.eor = QChar::DirL; + } + default: + break; + } + bidi.status.lastStrong = QChar::DirL; + break; + case QChar::DirAL: + case QChar::DirR: + if(dir == QChar::DirON) dir = QChar::DirR; + switch(bidi.status.last) + { + case QChar::DirR: + case QChar::DirAL: + bidi.eor = bidi.current; bidi.status.eor = QChar::DirR; break; + case QChar::DirL: + case QChar::DirEN: + case QChar::DirAN: + appendRun( bidi ); + dir = QChar::DirR; + bidi.eor = bidi.current; + bidi.status.eor = QChar::DirR; + break; + case QChar::DirES: + case QChar::DirET: + case QChar::DirCS: + case QChar::DirBN: + case QChar::DirB: + case QChar::DirS: + case QChar::DirWS: + case QChar::DirON: + if( !(bidi.status.eor == QChar::DirR) && !(bidi.status.eor == QChar::DirAL) ) { + //last stuff takes embedding dir + if(bidi.context->dir == QChar::DirR || bidi.status.lastStrong == QChar::DirR + || bidi.status.lastStrong == QChar::DirAL) { + appendRun( bidi ); + dir = QChar::DirR; + bidi.eor = bidi.current; + bidi.status.eor = QChar::DirR; + } else { + dir = QChar::DirL; + bidi.eor = bidi.last; + appendRun( bidi ); + dir = QChar::DirR; + bidi.status.eor = QChar::DirR; + } + } else { + bidi.eor = bidi.current; bidi.status.eor = QChar::DirR; + } + default: + break; + } + bidi.status.lastStrong = dirCurrent; + break; + + // weak types: + + case QChar::DirNSM: + // ### if @sor, set dir to dirSor + break; + case QChar::DirEN: + if(!(bidi.status.lastStrong == QChar::DirAL)) { + // if last strong was AL change EN to AN + if(dir == QChar::DirON) { + dir = QChar::DirL; + } + switch(bidi.status.last) + { + case QChar::DirET: + if ( bidi.status.lastStrong == QChar::DirR || bidi.status.lastStrong == QChar::DirAL ) { + appendRun( bidi ); + dir = QChar::DirEN; + bidi.status.eor = QChar::DirEN; + } + // fall through + case QChar::DirEN: + case QChar::DirL: + bidi.eor = bidi.current; + bidi.status.eor = dirCurrent; + break; + case QChar::DirR: + case QChar::DirAL: + case QChar::DirAN: + appendRun( bidi ); + bidi.status.eor = QChar::DirEN; + dir = QChar::DirEN; break; + case QChar::DirES: + case QChar::DirCS: + if(bidi.status.eor == QChar::DirEN) { + bidi.eor = bidi.current; break; + } + case QChar::DirBN: + case QChar::DirB: + case QChar::DirS: + case QChar::DirWS: + case QChar::DirON: + if(bidi.status.eor == QChar::DirR) { + // neutrals go to R + bidi.eor = bidi.last; + appendRun( bidi ); + dir = QChar::DirEN; + bidi.status.eor = QChar::DirEN; + } + else if( bidi.status.eor == QChar::DirL || + (bidi.status.eor == QChar::DirEN && bidi.status.lastStrong == QChar::DirL)) { + bidi.eor = bidi.current; bidi.status.eor = dirCurrent; + } else { + // numbers on both sides, neutrals get right to left direction + if(dir != QChar::DirL) { + appendRun( bidi ); + bidi.eor = bidi.last; + dir = QChar::DirR; + appendRun( bidi ); + dir = QChar::DirEN; + bidi.status.eor = QChar::DirEN; + } else { + bidi.eor = bidi.current; bidi.status.eor = dirCurrent; + } + } + default: + break; + } + break; + } + case QChar::DirAN: + dirCurrent = QChar::DirAN; + if(dir == QChar::DirON) dir = QChar::DirAN; + switch(bidi.status.last) + { + case QChar::DirL: + case QChar::DirAN: + bidi.eor = bidi.current; bidi.status.eor = QChar::DirAN; break; + case QChar::DirR: + case QChar::DirAL: + case QChar::DirEN: + appendRun( bidi ); + dir = QChar::DirAN; bidi.status.eor = QChar::DirAN; + break; + case QChar::DirCS: + if(bidi.status.eor == QChar::DirAN) { + bidi.eor = bidi.current; break; + } + case QChar::DirES: + case QChar::DirET: + case QChar::DirBN: + case QChar::DirB: + case QChar::DirS: + case QChar::DirWS: + case QChar::DirON: + if(bidi.status.eor == QChar::DirR) { + // neutrals go to R + bidi.eor = bidi.last; + appendRun( bidi ); + dir = QChar::DirAN; + bidi.status.eor = QChar::DirAN; + } else if( bidi.status.eor == QChar::DirL || + (bidi.status.eor == QChar::DirEN && bidi.status.lastStrong == QChar::DirL)) { + bidi.eor = bidi.current; bidi.status.eor = dirCurrent; + } else { + // numbers on both sides, neutrals get right to left direction + if(dir != QChar::DirL) { + appendRun( bidi ); + bidi.eor = bidi.last; + dir = QChar::DirR; + appendRun( bidi ); + dir = QChar::DirAN; + bidi.status.eor = QChar::DirAN; + } else { + bidi.eor = bidi.current; bidi.status.eor = dirCurrent; + } + } + default: + break; + } + break; + case QChar::DirES: + case QChar::DirCS: + break; + case QChar::DirET: + if(bidi.status.last == QChar::DirEN) { + dirCurrent = QChar::DirEN; + bidi.eor = bidi.current; bidi.status.eor = dirCurrent; + break; + } + break; + + // boundary neutrals should be ignored + case QChar::DirBN: + break; + // neutrals + case QChar::DirB: + // ### what do we do with newline and paragraph seperators that come to here? + break; + case QChar::DirS: + // ### implement rule L1 + break; + case QChar::DirWS: + break; + case QChar::DirON: + break; + default: + break; + } + + //cout << " after: dir=" << // dir << " current=" << dirCurrent << " last=" << status.last << " eor=" << status.eor << " lastStrong=" << status.lastStrong << " embedding=" << context->dir << endl; + + if(bidi.current.atEnd()) break; + + // set status.last as needed. + switch(dirCurrent) + { + case QChar::DirET: + case QChar::DirES: + case QChar::DirCS: + case QChar::DirS: + case QChar::DirWS: + case QChar::DirON: + switch(bidi.status.last) + { + case QChar::DirL: + case QChar::DirR: + case QChar::DirAL: + case QChar::DirEN: + case QChar::DirAN: + bidi.status.last = dirCurrent; + break; + default: + bidi.status.last = QChar::DirON; + } + break; + case QChar::DirNSM: + case QChar::DirBN: + // ignore these + break; + case QChar::DirEN: + if ( bidi.status.last == QChar::DirL ) { + break; + } + // fall through + default: + bidi.status.last = dirCurrent; + } +#endif + + if ( atEnd ) break; + bidi.last = bidi.current; + + if ( emptyRun ) { + bidi.sor = bidi.current; + bidi.eor = bidi.current; + emptyRun = false; + } + + // this causes the operator ++ to open and close embedding levels as needed + // for the CSS unicode-bidi property + adjustEmbedding = true; + bidi.current.increment( bidi ); + adjustEmbedding = false; + + if ( bidi.current == end ) { + if ( emptyRun ) + break; + atEnd = true; + } + } + +#if BIDI_DEBUG > 0 + kdDebug(6041) << "reached end of line current=" << current.obj << "/" << current.pos + << ", eor=" << eor.obj << "/" << eor.pos << endl; +#endif + if ( !emptyRun && bidi.sor != bidi.current ) { + bidi.eor = bidi.last; + appendRun( bidi ); + } + + // reorder line according to run structure... + + // first find highest and lowest levels + uchar levelLow = 128; + uchar levelHigh = 0; + BidiRun *r = sFirstBidiRun; + while ( r ) { + if ( r->level > levelHigh ) + levelHigh = r->level; + if ( r->level < levelLow ) + levelLow = r->level; + r = r->nextRun; + } + + // implements reordering of the line (L2 according to Bidi spec): + // L2. From the highest level found in the text to the lowest odd level on each line, + // reverse any contiguous sequence of characters that are at that level or higher. + + // reversing is only done up to the lowest odd level + if( !(levelLow%2) ) levelLow++; + +#if BIDI_DEBUG > 0 + kdDebug(6041) << "lineLow = " << (uint)levelLow << ", lineHigh = " << (uint)levelHigh << endl; + kdDebug(6041) << "logical order is:" << endl; + QPtrListIterator it2(runs); + BidiRun *r2; + for ( ; (r2 = it2.current()); ++it2 ) + kdDebug(6041) << " " << r2 << " start=" << r2->start << " stop=" << r2->stop << " level=" << (uint)r2->level << endl; +#endif + + int count = sBidiRunCount - 1; + + // do not reverse for visually ordered web sites + if(!style()->visuallyOrdered()) { + while(levelHigh >= levelLow) { + int i = 0; + BidiRun* currRun = sFirstBidiRun; + while ( i < count ) { + while(i < count && currRun && currRun->level < levelHigh) { + i++; + currRun = currRun->nextRun; + } + int start = i; + while(i <= count && currRun && currRun->level >= levelHigh) { + i++; + currRun = currRun->nextRun; + } + int end = i-1; + reverseRuns(start, end); + } + levelHigh--; + } + } + +#if BIDI_DEBUG > 0 + kdDebug(6041) << "visual order is:" << endl; + for (BidiRun* curr = sFirstRun; curr; curr = curr->nextRun) + kdDebug(6041) << " " << curr << endl; +#endif +} + +#ifdef APPLE_CHANGES // KDE handles compact blocks differently +static void buildCompactRuns(RenderObject* compactObj, BidiState &bidi) +{ + sBuildingCompactRuns = true; + if (!compactObj->isRenderBlock()) { + // Just append a run for our object. + isLineEmpty = false; + addRun(new (compactObj->renderArena()) BidiRun(0, compactObj->length(), compactObj, bidi.context, dir)); + } + else { + // Format the compact like it is its own single line. We build up all the runs for + // the little compact and then reorder them for bidi. + RenderBlock* compactBlock = static_cast(compactObj); + adjustEmbedding = true; + BidiIterator start(compactBlock, first(compactBlock, bidi), 0); + adjustEmbedding = false; + BidiIterator end = start; + + betweenMidpoints = false; + isLineEmpty = true; + previousLineBrokeAtBR = true; + + end = compactBlock->findNextLineBreak(start, bidi); + if (!isLineEmpty) + compactBlock->bidiReorderLine(start, end, bidi); + } + + + sCompactFirstBidiRun = sFirstBidiRun; + sCompactLastBidiRun = sLastBidiRun; + sCompactBidiRunCount = sBidiRunCount; + + sNumMidpoints = 0; + sCurrMidpoint = 0; + betweenMidpoints = false; + sBuildingCompactRuns = false; +} +#endif + +void RenderBlock::layoutInlineChildren(bool relayoutChildren, int breakBeforeLine) +{ + BidiState bidi; + + m_overflowHeight = 0; + + invalidateVerticalPositions(); +#ifdef DEBUG_LAYOUT + QTime qt; + qt.start(); + kdDebug( 6040 ) << renderName() << " layoutInlineChildren( " << this <<" )" << endl; +#endif +#if BIDI_DEBUG > 1 || defined( DEBUG_LINEBREAKS ) + kdDebug(6041) << " ------- bidi start " << this << " -------" << endl; +#endif + + m_height = borderTop() + paddingTop(); + int toAdd = borderBottom() + paddingBottom(); + if (m_layer && scrollsOverflowX() && style()->height().isVariable()) + toAdd += m_layer->horizontalScrollbarHeight(); + + // Clear out our line boxes. + deleteInlineBoxes(); + + // Text truncation only kicks in if your overflow isn't visible and your + // text-overflow-mode isn't clip. + bool hasTextOverflow = style()->textOverflow() && hasOverflowClip(); + + // Walk all the lines and delete our ellipsis line boxes if they exist. + if (hasTextOverflow) + deleteEllipsisLineBoxes(); + + if (firstChild()) { + // layout replaced elements + RenderObject *o = first( this, bidi, false ); + while ( o ) { + if (o->markedForRepaint()) { + o->repaintDuringLayout(); + o->setMarkedForRepaint(false); + } + if (o->isReplaced() || o->isFloating() || o->isPositioned()) { + // clear the placeHolderBox + if (o->isBox()) + static_cast(o)->RenderBox::deleteInlineBoxes(); + + //kdDebug(6041) << "layouting replaced or floating child" << endl; + if (relayoutChildren || o->style()->width().isPercent() || o->style()->height().isPercent()) + o->setChildNeedsLayout(true, false); + if (o->isPositioned()) + o->containingBlock()->insertPositionedObject(o); + else + o->layoutIfNeeded(); + } + else { + o->deleteInlineBoxes(); + o->setNeedsLayout(false); + } + o = Bidinext( this, o, bidi, false ); + } + + BidiContext *startEmbed; + if( style()->direction() == LTR ) { + startEmbed = new BidiContext( 0, QChar::DirL ); + bidi.status.eor = QChar::DirL; + } else { + startEmbed = new BidiContext( 1, QChar::DirR ); + bidi.status.eor = QChar::DirR; + } + startEmbed->ref(); + + bidi.status.lastStrong = QChar::DirON; + bidi.status.last = QChar::DirON; + + bidi.context = startEmbed; + adjustEmbedding = true; + BidiIterator start(this, first(this, bidi), 0); + adjustEmbedding = false; + BidiIterator end = start; + + m_firstLine = true; + + if (!smidpoints) + smidpoints = new QMemArray; + + sNumMidpoints = 0; + sCurrMidpoint = 0; + sCompactFirstBidiRun = sCompactLastBidiRun = 0; + sCompactBidiRunCount = 0; + + previousLineBrokeAtBR = true; + + int lineCount = 0; + bool pagebreakHint = false; + int oldPos = 0; + BidiIterator oldStart; + BidiState oldBidi; + const bool pagedMode = canvas()->pagedMode(); +// + while( !end.atEnd() ) { + start = end; + lineCount++; + betweenMidpoints = false; + isLineEmpty = true; + pagebreakHint = false; + if (pagedMode) { + oldPos = m_height; + oldStart = start; + oldBidi = bidi; + } +#ifdef APPLE_CHANGES // KDE handles compact blocks differently + if (m_firstLine && firstChild() && firstChild()->isCompact()) { + buildCompactRuns(firstChild(), bidi); + start.obj = firstChild()->nextSibling(); + end = start; + } +#endif + if (lineCount == breakBeforeLine) { + m_height = pageTopAfter(oldPos); + pagebreakHint = true; + } +redo_linebreak: + end = findNextLineBreak(start, bidi); + if( start.atEnd() ) break; + if (!isLineEmpty) { + bidiReorderLine(start, end, bidi); + + // Now that the runs have been ordered, we create the line boxes. + // At the same time we figure out where border/padding/margin should be applied for + // inline flow boxes. + +#ifdef APPLE_CHANGES // KDE handles compact blocks differently + if (sCompactFirstBidiRun) { + // We have a compact line sharing this line. Link the compact runs + // to our runs to create a single line of runs. + sCompactLastBidiRun->nextRun = sFirstBidiRun; + sFirstBidiRun = sCompactFirstBidiRun; + sBidiRunCount += sCompactBidiRunCount; + } +#endif + if (sBidiRunCount) { + InlineFlowBox* lineBox = constructLine(start, end); + if (lineBox) { + if (pagebreakHint) lineBox->setAfterPageBreak(true); + + // Now we position all of our text runs horizontally. + computeHorizontalPositionsForLine(lineBox, bidi); + + // Now position our text runs vertically. + computeVerticalPositionsForLine(lineBox); + + deleteBidiRuns(renderArena()); + + if (lineBox->afterPageBreak() && hasFloats() && !pagebreakHint) { + start = end = oldStart; + bidi = oldBidi; + m_height = pageTopAfter(oldPos); + deleteLastLineBox(renderArena()); + pagebreakHint = true; + goto redo_linebreak; + } + } + } + + if( end == start || (end.obj && end.obj->isBR() && !start.obj->isBR() ) ) { + adjustEmbedding = true; + end.increment(bidi); + adjustEmbedding = false; + } else if (end.obj && end.obj->style()->preserveLF() && end.current() == QChar('\n')) { + adjustEmbedding = true; + end.increment(bidi); + adjustEmbedding = false; + } + + m_firstLine = false; + newLine(); + } + + sNumMidpoints = 0; + sCurrMidpoint = 0; + sCompactFirstBidiRun = sCompactLastBidiRun = 0; + sCompactBidiRunCount = 0; + } + startEmbed->deref(); + //embed->deref(); + } + + sNumMidpoints = 0; + sCurrMidpoint = 0; + + // If we violate widows page-breaking rules, we set a hint and relayout. + // Note that the widows rule might still be violated afterwards if the lines have become wider + if (canvas()->pagedMode() && containsPageBreak() && breakBeforeLine == 0) + { + int orphans = 0; + int widows = 0; + // find breaking line + InlineRunBox* lineBox = firstLineBox(); + while (lineBox) { + if (lineBox->isInlineFlowBox()) { + InlineFlowBox* flowBox = static_cast(lineBox); + if (flowBox->afterPageBreak()) break; + } + orphans++; + lineBox = lineBox->nextLineBox(); + } + InlineFlowBox* pageBreaker = static_cast(lineBox); + if (!pageBreaker) goto no_break; + // count widows + while (lineBox && widows < style()->widows()) { + if (lineBox->hasTextChildren()) + widows++; + lineBox = lineBox->nextLineBox(); + } + // Widows rule broken and more orphans left to use + if (widows < style()->widows() && orphans > 0) { + kdDebug( 6040 ) << "Widows: " << widows << endl; + // Check if we have enough orphans after respecting widows count + int newOrphans = orphans - (style()->widows() - widows); + if (newOrphans < style()->orphans()) { + if (parent()->canClear(this,PageBreakHarder)) { + // Relayout to remove incorrect page-break + setNeedsPageClear(true); + setContainsPageBreak(false); + layoutInlineChildren(relayoutChildren, -1); + return; + } + } else { + // Set hint and try again + layoutInlineChildren(relayoutChildren, newOrphans+1); + return; + } + } + } + no_break: + + // in case we have a float on the last line, it might not be positioned up to now. + // This has to be done before adding in the bottom border/padding, or the float will + // include the padding incorrectly. -dwh + positionNewFloats(); + + // Now add in the bottom border/padding. + m_height += toAdd; + + // Always make sure this is at least our height. + m_overflowHeight = kMax(m_height, m_overflowHeight); + + // See if any lines spill out of the block. If so, we need to update our overflow width. + checkLinesForOverflow(); + + // See if we have any lines that spill out of our block. If we do, then we will + // possibly need to truncate text. + if (hasTextOverflow) + checkLinesForTextOverflow(); + +#if BIDI_DEBUG > 1 + kdDebug(6041) << " ------- bidi end " << this << " -------" << endl; +#endif + //kdDebug() << "RenderBlock::layoutInlineChildren time used " << qt.elapsed() << endl; + //kdDebug(6040) << "height = " << m_height <style()->isOriginalDisplayInlineType(); + nssx = o->hasStaticX(); + if (nssx && !isInlineType && o->isBox()) { + static_cast(o)->setStaticX(o->parent()->style()->direction() == LTR ? + p->borderLeft()+p->paddingLeft() : + p->borderRight()+p->paddingRight()); + nssx = false; + } + + // If our original display was an INLINE type, then we can + // determine our static y position now. + nssy = o->hasStaticY(); + if (nssy && o->isBox()) { + static_cast(o)->setStaticY(p->height()); + nssy = !isInlineType; + } + if (needToSetStaticX) *needToSetStaticX = nssx; + if (needToSetStaticY) *needToSetStaticY = nssy; +} + +BidiIterator RenderBlock::findNextLineBreak(BidiIterator &start, BidiState &bidi) +{ + int width = lineWidth(m_height); + int w = 0; + int tmpW = 0; +#ifdef DEBUG_LINEBREAKS + kdDebug(6041) << "findNextLineBreak: line at " << m_height << " line width " << width << endl; + kdDebug(6041) << "sol: " << start.obj << " " << start.pos << endl; +#endif + + BidiIterator posStart = start; + bool hadPosStart = false; + + // eliminate spaces at beginning of line + // remove leading spaces. Any inline flows we encounter will be empty and should also + // be skipped. + while (!start.atEnd() && (start.obj->isInlineFlow() || (!start.obj->style()->preserveWS() && !start.obj->isBR() && +#ifndef QT_NO_UNICODETABLES + ( (start.current().unicode() == (ushort)0x0020) || // ASCII space + (start.current().unicode() == (ushort)0x0009) || // ASCII tab + (start.current().unicode() == (ushort)0x000A) || // ASCII line feed + (start.current().unicode() == (ushort)0x000C) || // ASCII form feed + (start.current().unicode() == (ushort)0x200B) || // Zero-width space + start.obj->isFloatingOrPositioned() ) +#else + ( start.current() == ' ' || start.current() == '\n' || start.obj->isFloatingOrPositioned() ) +#endif + ))) { + if( start.obj->isFloatingOrPositioned() ) { + RenderObject *o = start.obj; + // add to special objects... + if (o->isFloating()) { + insertFloatingObject(o); + positionNewFloats(); + width = lineWidth(m_height); + } + else if (o->isBox() && o->isPositioned()) { + if (!hadPosStart) { + hadPosStart = true; + posStart = start; + // end + addMidpoint(BidiIterator(0, o, 0)); + } else { + // start/end + addMidpoint(BidiIterator(0, o, 0)); + addMidpoint(BidiIterator(0, o, 0)); + } + setStaticPosition(this, o); + } + } + adjustEmbedding = true; + start.increment(bidi); + adjustEmbedding = false; + } + + if (hadPosStart && !start.atEnd()) + addMidpoint(start); + + if ( start.atEnd() ){ + if (hadPosStart) { + start = posStart; + posStart.increment(bidi); + return posStart; + } + return start; + } + + // This variable is used only if whitespace isn't set to PRE, and it tells us whether + // or not we are currently ignoring whitespace. + bool ignoringSpaces = false; + BidiIterator ignoreStart; + + // This variable tracks whether the very last character we saw was a space. We use + // this to detect when we encounter a second space so we know we have to terminate + // a run. + bool currentCharacterIsSpace = false; + RenderObject* trailingSpaceObject = 0; + + BidiIterator lBreak = start; + + RenderObject *o = start.obj; + RenderObject *last = o; + int pos = start.pos; + + bool prevLineBrokeCleanly = previousLineBrokeAtBR; + previousLineBrokeAtBR = false; + + while( o ) { +#ifdef DEBUG_LINEBREAKS + kdDebug(6041) << "new object "<< o <<" width = " << w <<" tmpw = " << tmpW << endl; +#endif + if(o->isBR()) { + if( w + tmpW <= width ) { + lBreak.obj = o; + lBreak.pos = 0; + + // A
always breaks a line, so don't let the line be collapsed + // away. Also, the space at the end of a line with a
does not + // get collapsed away. It only does this if the previous line broke + // cleanly. Otherwise the
has no effect on whether the line is + // empty or not. + if (prevLineBrokeCleanly) + isLineEmpty = false; + trailingSpaceObject = 0; + previousLineBrokeAtBR = true; + + if (!isLineEmpty) { + // only check the clear status for non-empty lines. + EClear clear = o->style()->clear(); + if(clear != CNONE) + m_clearStatus = (EClear) (m_clearStatus | clear); + } + } + goto end; + } + if( o->isFloatingOrPositioned() ) { + // add to special objects... + if(o->isFloating()) { + insertFloatingObject(o); + // check if it fits in the current line. + // If it does, position it now, otherwise, position + // it after moving to next line (in newLine() func) + if (o->width()+o->marginLeft()+o->marginRight()+w+tmpW <= width) { + positionNewFloats(); + width = lineWidth(m_height); + } + } + else if (o->isPositioned()) { + bool needToSetStaticX; + bool needToSetStaticY; + setStaticPosition(this, o, &needToSetStaticX, &needToSetStaticY); + + // If we're ignoring spaces, we have to stop and include this object and + // then start ignoring spaces again. + if (needToSetStaticX || needToSetStaticY) { + trailingSpaceObject = 0; + ignoreStart.obj = o; + ignoreStart.pos = 0; + if (ignoringSpaces) { + addMidpoint(ignoreStart); // Stop ignoring spaces. + addMidpoint(ignoreStart); // Start ignoring again. + } + } + } + } else if (o->isInlineFlow()) { + // Only empty inlines matter. We treat those similarly to replaced elements. + KHTMLAssert(!o->firstChild()); + tmpW += o->marginLeft()+o->borderLeft()+o->paddingLeft()+ + o->marginRight()+o->borderRight()+o->paddingRight(); + } else if ( o->isReplaced() || o->isGlyph() ) { + EWhiteSpace currWS = o->style()->whiteSpace(); + EWhiteSpace lastWS = last->style()->whiteSpace(); + + // WinIE marquees have different whitespace characteristics by default when viewed from + // the outside vs. the inside. Text inside is NOWRAP, and so we altered the marquee's + // style to reflect this, but we now have to get back to the original whitespace value + // for the marquee when checking for line breaking. + if (o->isHTMLMarquee() && o->layer() && o->layer()->marquee()) + currWS = o->layer()->marquee()->whiteSpace(); + if (last->isHTMLMarquee() && last->layer() && last->layer()->marquee()) + lastWS = last->layer()->marquee()->whiteSpace(); + + // Break on replaced elements if either has normal white-space. + if (currWS == NORMAL || lastWS == NORMAL) { + w += tmpW; + tmpW = 0; + lBreak.obj = o; + lBreak.pos = 0; + } + + tmpW += o->width()+o->marginLeft()+o->marginRight()+inlineWidth(o); + if (ignoringSpaces) { + BidiIterator startMid( 0, o, 0 ); + addMidpoint(startMid); + } + isLineEmpty = false; + ignoringSpaces = false; + currentCharacterIsSpace = false; + trailingSpaceObject = 0; + + if (o->isListMarker() && o->style()->listStylePosition() == OUTSIDE) { + // The marker must not have an effect on whitespace at the start + // of the line. We start ignoring spaces to make sure that any additional + // spaces we see will be discarded. + // + // Optimize for a common case. If we can't find whitespace after the list + // item, then this is all moot. -dwh + RenderObject* next = Bidinext( start.par, o, bidi ); + if (!style()->preserveWS() && next && next->isText() && static_cast(next)->stringLength() > 0 && + (static_cast(next)->text()[0].category() == QChar::Separator_Space || + static_cast(next)->text()[0] == '\n')) { + currentCharacterIsSpace = true; + ignoringSpaces = true; + BidiIterator endMid( 0, o, 0 ); + addMidpoint(endMid); + } + } + } else if ( o->isText() ) { + RenderText *t = static_cast(o); + int strlen = t->stringLength(); + int len = strlen - pos; + QChar *str = t->text(); + + const Font *f = t->htmlFont( m_firstLine ); + // proportional font, needs a bit more work. + int lastSpace = pos; + bool autoWrap = o->style()->autoWrap(); + bool preserveWS = o->style()->preserveWS(); + bool preserveLF = o->style()->preserveLF(); +#ifdef APPLE_CHANGES + int wordSpacing = o->style()->wordSpacing(); +#endif + bool appliedStartWidth = pos > 0; // If the span originated on a previous line, + // then assume the start width has been applied. + bool appliedEndWidth = false; + bool nextIsSoftBreakable = false; + + while(len) { + bool previousCharacterIsSpace = currentCharacterIsSpace; + bool isSoftBreakable = nextIsSoftBreakable; + nextIsSoftBreakable = false; + const QChar c = str[pos]; + currentCharacterIsSpace = c == ' '; + + if (preserveWS || !currentCharacterIsSpace) + isLineEmpty = false; + + // Check for soft hyphens. Go ahead and ignore them. + if (c.unicode() == SOFT_HYPHEN && pos > 0) { + nextIsSoftBreakable = true; + if (!ignoringSpaces) { + // Ignore soft hyphens + BidiIterator endMid(0, o, pos-1); + addMidpoint(endMid); + + // Add the width up to but not including the hyphen. + tmpW += t->width(lastSpace, pos - lastSpace, f); + + // For wrapping text only, include the hyphen. We need to ensure it will fit + // on the line if it shows when we break. + if (o->style()->autoWrap()) + tmpW += t->width(pos, 1, f); + + BidiIterator startMid(0, o, pos+1); + addMidpoint(startMid); + } + + pos++; + len--; + lastSpace = pos; // Cheesy hack to prevent adding in widths of the run twice. + continue; + } +#ifdef APPLE_CHANGES // KDE applies wordspacing differently + bool applyWordSpacing = false; +#endif + if (ignoringSpaces) { + // We need to stop ignoring spaces, if we encounter a non-space or + // a run that doesn't collapse spaces. + if (!currentCharacterIsSpace || preserveWS) { + // Stop ignoring spaces and begin at this + // new point. + ignoringSpaces = false; + lastSpace = pos; // e.g., "Foo goo", don't add in any of the ignored spaces. + BidiIterator startMid ( 0, o, pos ); + addMidpoint(startMid); + } + else { + // Just keep ignoring these spaces. + pos++; + len--; + continue; + } + } + + if ( (preserveLF && c == '\n') || (autoWrap && (isBreakable( str, pos, strlen ) || isSoftBreakable)) ) { + + tmpW += t->width(lastSpace, pos - lastSpace, f); + if (!appliedStartWidth) { + tmpW += inlineWidth(o, true, false); + appliedStartWidth = true; + } +#ifdef APPLE_CHANGES + applyWordSpacing = (wordSpacing && currentCharacterIsSpace && !previousCharacterIsSpace && + !t->containsOnlyWhitespace(pos+1, strlen-(pos+1))); +#endif +#ifdef DEBUG_LINEBREAKS + kdDebug(6041) << "found space at " << pos << " in string '" << QString( str, strlen ).latin1() << "' adding " << tmpW << " new width = " << w << endl; +#endif + if ( autoWrap && w + tmpW > width && w == 0 ) { + int fb = nearestFloatBottom(m_height); + int newLineWidth = lineWidth(fb); + // See if |tmpW| will fit on the new line. As long as it does not, + // keep adjusting our float bottom until we find some room. + int lastFloatBottom = m_height; + while (lastFloatBottom < fb && tmpW > newLineWidth) { + lastFloatBottom = fb; + fb = nearestFloatBottom(fb); + newLineWidth = lineWidth(fb); + } + + if(!w && m_height < fb && width < newLineWidth) { + m_height = fb; + width = newLineWidth; +#ifdef DEBUG_LINEBREAKS + kdDebug() << "RenderBlock::findNextLineBreak new position at " << m_height << " newWidth " << width << endl; +#endif + } + } + + if (autoWrap) { + if (w+tmpW > width) + goto end; + else if ( (pos > 1 && str[pos-1].unicode() == SOFT_HYPHEN) ) + // Subtract the width of the soft hyphen out since we fit on a line. + tmpW -= t->width(pos-1, 1, f); + } + + if( preserveLF && *(str+pos) == '\n' ) { + lBreak.obj = o; + lBreak.pos = pos; + +#ifdef DEBUG_LINEBREAKS + kdDebug(6041) << "forced break sol: " << start.obj << " " << start.pos << " end: " << lBreak.obj << " " << lBreak.pos << " width=" << w << endl; +#endif + return lBreak; + } + + if ( autoWrap ) { + w += tmpW; + tmpW = 0; + lBreak.obj = o; + lBreak.pos = pos; + } + + lastSpace = pos; +#ifdef APPLE_CHANGES + if (applyWordSpacing) + w += wordSpacing; +#endif + } + + if (!ignoringSpaces && !preserveWS) { + // If we encounter a second space, we need to go ahead and break up this run + // and enter a mode where we start collapsing spaces. + if (currentCharacterIsSpace && previousCharacterIsSpace) { + ignoringSpaces = true; + + // We just entered a mode where we are ignoring + // spaces. Create a midpoint to terminate the run + // before the second space. + addMidpoint(ignoreStart); + lastSpace = pos; + } + } + + if (currentCharacterIsSpace && !previousCharacterIsSpace) { + ignoreStart.obj = o; + ignoreStart.pos = pos; + } + + if (!preserveWS && currentCharacterIsSpace && !ignoringSpaces) + trailingSpaceObject = o; + else if (preserveWS || !currentCharacterIsSpace) + trailingSpaceObject = 0; + + pos++; + len--; + } + + // IMPORTANT: pos is > length here! + if (!ignoringSpaces) + tmpW += t->width(lastSpace, pos - lastSpace, f); + if (!appliedStartWidth) + tmpW += inlineWidth(o, true, false); + if (!appliedEndWidth) + tmpW += inlineWidth(o, false, true); + } else + KHTMLAssert( false ); + + RenderObject* next = Bidinext(start.par, o, bidi); + bool autoWrap = o->style()->autoWrap(); + bool checkForBreak = autoWrap; + if (w && w + tmpW > width && lBreak.obj && !o->style()->preserveLF() && !autoWrap) + checkForBreak = true; + else if (next && o->isText() && next->isText() && !next->isBR()) { + if (autoWrap || next->style()->autoWrap()) { + if (currentCharacterIsSpace) + checkForBreak = true; + else { + checkForBreak = false; + RenderText* nextText = static_cast(next); + if (nextText->stringLength() != 0) { + QChar c = nextText->text()[0]; + if (c == ' ' || c == '\t' || (c == '\n' && !next->style()->preserveLF())) { + // If the next item on the line is text, and if we did not end with + // a space, then the next text run continues our word (and so it needs to + // keep adding to |tmpW|. Just update and continue. + checkForBreak = true; + } + } + + bool canPlaceOnLine = (w + tmpW <= width) || !autoWrap; + if (canPlaceOnLine && checkForBreak) { + w += tmpW; + tmpW = 0; + lBreak.obj = next; + lBreak.pos = 0; + } + } + } + } + + if (checkForBreak && (w + tmpW > width)) { + //kdDebug() << " too wide w=" << w << " tmpW = " << tmpW << " width = " << width << endl; + //kdDebug() << "start=" << start.obj << " current=" << o << endl; + // if we have floats, try to get below them. + if (currentCharacterIsSpace && !ignoringSpaces && !o->style()->preserveWS()) + trailingSpaceObject = 0; + + int fb = nearestFloatBottom(m_height); + int newLineWidth = lineWidth(fb); + // See if |tmpW| will fit on the new line. As long as it does not, + // keep adjusting our float bottom until we find some room. + int lastFloatBottom = m_height; + while (lastFloatBottom < fb && tmpW > newLineWidth) { + lastFloatBottom = fb; + fb = nearestFloatBottom(fb); + newLineWidth = lineWidth(fb); + } + if( !w && m_height < fb && width < newLineWidth ) { + m_height = fb; + width = newLineWidth; +#ifdef DEBUG_LINEBREAKS + kdDebug() << "RenderBlock::findNextLineBreak new position at " << m_height << " newWidth " << width << endl; +#endif + } + + // |width| may have been adjusted because we got shoved down past a float (thus + // giving us more room), so we need to retest, and only jump to + // the end label if we still don't fit on the line. -dwh + if (w + tmpW > width) + goto end; + } + + last = o; + o = next; + + if (!last->isFloatingOrPositioned() && last->isReplaced() && last->style()->autoWrap()) { + // Go ahead and add in tmpW. + w += tmpW; + tmpW = 0; + lBreak.obj = o; + lBreak.pos = 0; + } + + // Clear out our character space bool, since inline 
s don't collapse whitespace
+        // with adjacent inline normal/nowrap spans.
+        if (last->style()->preserveWS())
+            currentCharacterIsSpace = false;
+
+        pos = 0;
+    }
+
+#ifdef DEBUG_LINEBREAKS
+    kdDebug( 6041 ) << "end of par, width = " << width << " linewidth = " << w + tmpW << endl;
+#endif
+    if( w + tmpW <= width || (last && !last->style()->autoWrap())) {
+        lBreak.obj = 0;
+        lBreak.pos = 0;
+    }
+
+ end:
+
+    if( lBreak == start && !lBreak.obj->isBR() ) {
+        // we just add as much as possible
+        if ( style()->whiteSpace() == PRE ) {
+            // FIXME: Don't really understand this case.
+            if(pos != 0) {
+                lBreak.obj = o;
+                lBreak.pos = pos - 1;
+            } else {
+                lBreak.obj = last;
+                lBreak.pos = last->isText() ? last->length() : 0;
+            }
+        } else if( lBreak.obj ) {
+            if( last != o ) {
+                // better to break between object boundaries than in the middle of a word
+                lBreak.obj = o;
+                lBreak.pos = 0;
+            } else {
+                // Don't ever break in the middle of a word if we can help it.
+                // There's no room at all. We just have to be on this line,
+                // even though we'll spill out.
+                lBreak.obj = o;
+                lBreak.pos = pos;
+            }
+        }
+    }
+
+    if (hadPosStart)
+        start = posStart;
+
+    // make sure we consume at least one char/object.
+    if( lBreak == start )
+        lBreak.increment(bidi);
+
+#ifdef DEBUG_LINEBREAKS
+    kdDebug(6041) << "regular break sol: " << start.obj << " " << start.pos << "   end: " << lBreak.obj << " " << lBreak.pos << "   width=" << w << endl;
+#endif
+
+    // Sanity check our midpoints.
+    checkMidpoints(lBreak, bidi);
+
+    if (trailingSpaceObject) {
+        // This object is either going to be part of the last midpoint, or it is going
+        // to be the actual endpoint.  In both cases we just decrease our pos by 1 level to
+        // exclude the space, allowing it to - in effect - collapse into the newline.
+        if (sNumMidpoints%2==1) {
+            BidiIterator* midpoints = smidpoints->data();
+            midpoints[sNumMidpoints-1].pos--;
+        }
+        //else if (lBreak.pos > 0)
+        //    lBreak.pos--;
+        else if (lBreak.obj == 0 && trailingSpaceObject->isText()) {
+            // Add a new end midpoint that stops right at the very end.
+            RenderText* text = static_cast(trailingSpaceObject);
+            unsigned pos = text->length() >=2 ? text->length() - 2 : UINT_MAX;
+            BidiIterator endMid ( 0, trailingSpaceObject, pos );
+            addMidpoint(endMid);
+        }
+    }
+
+    // We might have made lBreak an iterator that points past the end
+    // of the object. Do this adjustment to make it point to the start
+    // of the next object instead to avoid confusing the rest of the
+    // code.
+    if (lBreak.pos > 0) {
+        lBreak.pos--;
+        lBreak.increment(bidi);
+    }
+
+    if (lBreak.obj && lBreak.pos >= 2 && lBreak.obj->isText()) {
+        // For soft hyphens on line breaks, we have to chop out the midpoints that made us
+        // ignore the hyphen so that it will render at the end of the line.
+        QChar c = static_cast(lBreak.obj)->text()[lBreak.pos-1];
+        if (c.unicode() == SOFT_HYPHEN)
+            chopMidpointsAt(lBreak.obj, lBreak.pos-2);
+    }
+
+    return lBreak;
+}
+
+void RenderBlock::checkLinesForOverflow()
+{
+    for (RootInlineBox* curr = static_cast(firstLineBox()); curr; curr = static_cast(curr->nextLineBox())) {
+//         m_overflowLeft = min(curr->leftOverflow(), m_overflowLeft);
+        m_overflowTop = kMin(curr->topOverflow(), m_overflowTop);
+//         m_overflowWidth = max(curr->rightOverflow(), m_overflowWidth);
+        m_overflowHeight = kMax(curr->bottomOverflow(), m_overflowHeight);
+    }
+}
+
+void RenderBlock::deleteEllipsisLineBoxes()
+{
+    for (RootInlineBox* curr = firstRootBox(); curr; curr = curr->nextRootBox())
+        curr->clearTruncation();
+}
+
+void RenderBlock::checkLinesForTextOverflow()
+{
+    // Determine the width of the ellipsis using the current font.
+    QChar ellipsis = 0x2026; // FIXME: CSS3 says this is configurable, also need to use 0x002E (FULL STOP) if 0x2026 not renderable
+    static QString ellipsisStr(ellipsis);
+    const Font& firstLineFont = style(true)->htmlFont();
+    const Font& font = style()->htmlFont();
+    int firstLineEllipsisWidth = firstLineFont.width(&ellipsis, 1, 0);
+    int ellipsisWidth = (font == firstLineFont) ? firstLineEllipsisWidth : font.width(&ellipsis, 1, 0);
+
+    // For LTR text truncation, we want to get the right edge of our padding box, and then we want to see
+    // if the right edge of a line box exceeds that.  For RTL, we use the left edge of the padding box and
+    // check the left edge of the line box to see if it is less
+    // Include the scrollbar for overflow blocks, which means we want to use "contentWidth()"
+    bool ltr = style()->direction() == LTR;
+    for (RootInlineBox* curr = firstRootBox(); curr; curr = curr->nextRootBox()) {
+        int blockEdge = ltr ? rightOffset(curr->yPos()) : leftOffset(curr->yPos());
+        int lineBoxEdge = ltr ? curr->xPos() + curr->width() : curr->xPos();
+        if ((ltr && lineBoxEdge > blockEdge) || (!ltr && lineBoxEdge < blockEdge)) {
+            // This line spills out of our box in the appropriate direction.  Now we need to see if the line
+            // can be truncated.  In order for truncation to be possible, the line must have sufficient space to
+            // accommodate our truncation string, and no replaced elements (images, tables) can overlap the ellipsis
+            // space.
+            int width = curr == firstRootBox() ? firstLineEllipsisWidth : ellipsisWidth;
+            if (curr->canAccommodateEllipsis(ltr, blockEdge, lineBoxEdge, width))
+                curr->placeEllipsis(ellipsisStr, ltr, blockEdge, width);
+        }
+    }
+}
+
+// For --enable-final
+#undef BIDI_DEBUG
+#undef DEBUG_LINEBREAKS
+#undef DEBUG_LAYOUT
+
+}
-- 
cgit v1.2.1