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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2013-01-26 13:17:21 -0600
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2013-01-26 13:17:21 -0600
commitdfe289850f068f19ba4a83ab4e7e22a7e09c13c9 (patch)
treec297348a55df66c571de4525646e0b9762427353 /tdehtml/rendering/render_block.cpp
parentb7658a0d5eca24a9d37c6e04f88298ef02389db0 (diff)
downloadtdelibs-dfe289850f068f19ba4a83ab4e7e22a7e09c13c9.tar.gz
tdelibs-dfe289850f068f19ba4a83ab4e7e22a7e09c13c9.zip
Rename a number of libraries and executables to avoid conflicts with KDE4
Diffstat (limited to 'tdehtml/rendering/render_block.cpp')
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1 files changed, 3155 insertions, 0 deletions
diff --git a/tdehtml/rendering/render_block.cpp b/tdehtml/rendering/render_block.cpp
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+/*
+ * This file is part of the render object implementation for KHTML.
+ *
+ * Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org)
+ * (C) 1999-2003 Antti Koivisto (koivisto@kde.org)
+ * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
+ * (C) 2003,2005 Apple Computer, Inc.
+ * (C) 2004 Germain Garand (germain@ebooksfrance.org)
+ * (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
+ * (C) 2006 Charles Samuels (charles@kde.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.
+ *
+ */
+
+//#define DEBUG
+//#define DEBUG_LAYOUT
+//#define BOX_DEBUG
+//#define FLOAT_DEBUG
+//#define PAGE_DEBUG
+
+#include <kdebug.h>
+#include "rendering/render_text.h"
+#include "rendering/render_table.h"
+#include "rendering/render_canvas.h"
+#include "rendering/render_layer.h"
+#include "rendering/render_block.h"
+
+#include "xml/dom_nodeimpl.h"
+#include "xml/dom_docimpl.h"
+#include "html/html_formimpl.h"
+#include "misc/htmltags.h"
+
+#include "tdehtmlview.h"
+
+using namespace DOM;
+
+namespace tdehtml {
+
+// -------------------------------------------------------------------------------------------------------
+
+// Our MarginInfo state used when laying out block children.
+RenderBlock::MarginInfo::MarginInfo(RenderBlock* block, int top, int bottom)
+{
+ // Whether or not we can collapse our own margins with our children. We don't do this
+ // if we had any border/padding (obviously), if we're the root or HTML elements, or if
+ // we're positioned, floating, a table cell.
+ m_canCollapseWithChildren = !block->isCanvas() && !block->isRoot() && !block->isPositioned() &&
+ !block->isFloating() && !block->isTableCell() && !block->hasOverflowClip() && !block->isInlineBlockOrInlineTable();
+
+ m_canCollapseTopWithChildren = m_canCollapseWithChildren && (top == 0) /*&& block->style()->marginTopCollapse() != MSEPARATE */;
+
+ // If any height other than auto is specified in CSS, then we don't collapse our bottom
+ // margins with our children's margins. To do otherwise would be to risk odd visual
+ // effects when the children overflow out of the parent block and yet still collapse
+ // with it. We also don't collapse if we have any bottom border/padding.
+ m_canCollapseBottomWithChildren = m_canCollapseWithChildren && (bottom == 0) &&
+ (block->style()->height().isVariable() && block->style()->height().value() == 0) /*&& block->style()->marginBottomCollapse() != MSEPARATE*/;
+
+ m_quirkContainer = block->isTableCell() || block->isBody() /*|| block->style()->marginTopCollapse() == MDISCARD ||
+ block->style()->marginBottomCollapse() == MDISCARD*/;
+
+ m_atTopOfBlock = true;
+ m_atBottomOfBlock = false;
+
+ m_posMargin = m_canCollapseTopWithChildren ? block->maxTopMargin(true) : 0;
+ m_negMargin = m_canCollapseTopWithChildren ? block->maxTopMargin(false) : 0;
+
+ m_selfCollapsingBlockClearedFloat = false;
+
+ m_topQuirk = m_bottomQuirk = m_determinedTopQuirk = false;
+}
+
+// -------------------------------------------------------------------------------------------------------
+
+RenderBlock::RenderBlock(DOM::NodeImpl* node)
+ : RenderFlow(node)
+{
+ m_childrenInline = true;
+ m_floatingObjects = 0;
+ m_positionedObjects = 0;
+ m_firstLine = false;
+ m_avoidPageBreak = false;
+ m_clearStatus = CNONE;
+ m_maxTopPosMargin = m_maxTopNegMargin = m_maxBottomPosMargin = m_maxBottomNegMargin = 0;
+ m_topMarginQuirk = m_bottomMarginQuirk = false;
+ m_overflowHeight = m_overflowWidth = 0;
+ m_overflowLeft = m_overflowTop = 0;
+}
+
+RenderBlock::~RenderBlock()
+{
+ delete m_floatingObjects;
+ delete m_positionedObjects;
+}
+
+void RenderBlock::setStyle(RenderStyle* _style)
+{
+ setReplaced(_style->isDisplayReplacedType());
+
+ RenderFlow::setStyle(_style);
+
+ // ### we could save this call when the change only affected
+ // non inherited properties
+ RenderObject *child = firstChild();
+ while (child != 0)
+ {
+ if (child->isAnonymousBlock())
+ {
+ RenderStyle* newStyle = new RenderStyle();
+ newStyle->inheritFrom(style());
+ newStyle->setDisplay(BLOCK);
+ child->setStyle(newStyle);
+ }
+ child = child->nextSibling();
+ }
+
+ if (attached()) {
+ // Update generated content and ::inside
+ updateReplacedContent();
+ // Update pseudos for :before and :after
+ updatePseudoChildren();
+ }
+
+ // handled by close() during parsing
+ // ### remove close move upto updatePseudo
+ if (!document()->parsing()) {
+ updateFirstLetter();
+ }
+}
+
+// Attach handles initial setStyle that requires parent nodes
+void RenderBlock::attach()
+{
+ RenderFlow::attach();
+
+ updateReplacedContent();
+ updatePseudoChildren();
+}
+
+void RenderBlock::updateFirstLetter()
+{
+ // Only blocks with inline-children can generate a first-letter
+ if (!childrenInline() || !firstChild()) return;
+
+ // Don't recurse
+ if (style()->styleType() == RenderStyle::FIRST_LETTER) return;
+
+ // The first-letter style is inheritable.
+ RenderStyle *pseudoStyle = style()->getPseudoStyle(RenderStyle::FIRST_LETTER);
+ RenderObject *o = this;
+ while (o && !pseudoStyle) {
+ // ### We should ignore empty preceding siblings
+ if (o->parent() && o->parent()->firstChild() == this)
+ o = o->parent();
+ else
+ break;
+ pseudoStyle = o->style()->getPseudoStyle(RenderStyle::FIRST_LETTER);
+ };
+
+ // FIXME: Currently we don't delete first-letters, this is
+ // handled instead in NodeImpl::diff by issuing Detach on first-letter changes.
+ if (!pseudoStyle) {
+ return;
+ }
+
+ // Drill into inlines looking for our first text child.
+ RenderObject* firstText = firstChild();
+ while (firstText && firstText->needsLayout() && !firstText->isFloating() && !firstText->isRenderBlock() && !firstText->isReplaced() && !firstText->isText())
+ // ### We should skip first children with only white-space and punctuation
+ firstText = firstText->firstChild();
+
+ if (firstText && firstText->isText() && !firstText->isBR()) {
+ RenderObject* firstLetterObject = 0;
+ // Find the old first-letter
+ if (firstText->parent()->style()->styleType() == RenderStyle::FIRST_LETTER)
+ firstLetterObject = firstText->parent();
+
+ // Force inline display (except for floating first-letters)
+ pseudoStyle->setDisplay( pseudoStyle->isFloating() ? BLOCK : INLINE);
+ pseudoStyle->setPosition( STATIC ); // CSS2 says first-letter can't be positioned.
+
+ if (firstLetterObject != 0) {
+ firstLetterObject->setStyle( pseudoStyle );
+ RenderStyle* newStyle = new RenderStyle();
+ newStyle->inheritFrom( pseudoStyle );
+ firstText->setStyle( newStyle );
+ return;
+ }
+
+ RenderText* textObj = static_cast<RenderText*>(firstText);
+ RenderObject* firstLetterContainer = firstText->parent();
+
+ firstLetterObject = RenderFlow::createFlow(node(), pseudoStyle, renderArena() );
+ firstLetterObject->setIsAnonymous( true );
+ firstLetterContainer->addChild(firstLetterObject, firstLetterContainer->firstChild());
+
+ // if this object is the result of a :begin, then the text may have not been
+ // generated yet if it is a counter
+ if (textObj->recalcMinMax())
+ textObj->recalcMinMaxWidths();
+
+ // The original string is going to be either a generated content string or a DOM node's
+ // string. We want the original string before it got transformed in case first-letter has
+ // no text-transform or a different text-transform applied to it.
+ DOMStringImpl* oldText = textObj->originalString();
+ if (!oldText)
+ oldText = textObj->string();
+ // ### In theory a first-letter can stretch across multiple text objects, if they only contain
+ // punctuation and white-space
+ if(oldText->l >= 1) {
+ oldText->ref();
+ // begin: we need skip leading whitespace so that RenderBlock::findNextLineBreak
+ // won't think we're continuing from a previous run
+ unsigned int begin = 0; // the position that first-letter begins
+ unsigned int length = 0; // the position that "the rest" begins
+ while ( length < oldText->l && (oldText->s+length)->isSpace() )
+ length++;
+ begin = length;
+ while ( length < oldText->l &&
+ ( (oldText->s+length)->isPunct()) || (oldText->s+length)->isSpace() )
+ length++;
+ if ( length < oldText->l &&
+ !( (oldText->s+length)->isSpace() || (oldText->s+length)->isPunct() ))
+ length++;
+ while ( length < oldText->l && (oldText->s+length)->isMark() )
+ length++;
+
+ // we need to generated a remainingText object even if no text is left
+ // because it holds the place and style for the old textObj
+ RenderTextFragment* remainingText =
+ new (renderArena()) RenderTextFragment(textObj->node(), oldText, length, oldText->l-length);
+ remainingText->setIsAnonymous( textObj->isAnonymous() );
+ remainingText->setStyle(textObj->style());
+ if (remainingText->element())
+ remainingText->element()->setRenderer(remainingText);
+
+ RenderObject* nextObj = textObj->nextSibling();
+ textObj->detach();
+ firstLetterContainer->addChild(remainingText, nextObj);
+
+ RenderTextFragment* letter =
+ new (renderArena()) RenderTextFragment(remainingText->node(), oldText, begin, length-begin);
+ letter->setIsAnonymous( remainingText->isAnonymous() );
+ RenderStyle* newStyle = new RenderStyle();
+ newStyle->inheritFrom(pseudoStyle);
+ letter->setStyle(newStyle);
+ firstLetterObject->addChild(letter);
+ oldText->deref();
+ }
+ firstLetterObject->close();
+ }
+}
+
+void RenderBlock::addChildToFlow(RenderObject* newChild, RenderObject* beforeChild)
+{
+ // Make sure we don't append things after :after-generated content if we have it.
+ if ( !beforeChild && lastChild() && lastChild()->style()->styleType() == RenderStyle::AFTER )
+ beforeChild = lastChild();
+
+ bool madeBoxesNonInline = false;
+
+ // If the requested beforeChild is not one of our children, then this is most likely because
+ // there is an anonymous block box within this object that contains the beforeChild. So
+ // just insert the child into the anonymous block box instead of here. This may also be
+ // needed in cases of things like anonymous tables.
+ if (beforeChild && beforeChild->parent() != this) {
+
+ KHTMLAssert(beforeChild->parent());
+
+ // In the special case where we are prepending a block-level element before
+ // something contained inside an anonymous block, we can just prepend it before
+ // the anonymous block.
+ if (!newChild->isInline() && beforeChild->parent()->isAnonymousBlock() &&
+ beforeChild->parent()->parent() == this &&
+ beforeChild->parent()->firstChild() == beforeChild)
+ return addChildToFlow(newChild, beforeChild->parent());
+
+ // Otherwise find our kid inside which the beforeChild is, and delegate to it.
+ // This may be many levels deep due to anonymous tables, table sections, etc.
+ RenderObject* responsible = beforeChild->parent();
+ while (responsible->parent() != this)
+ responsible = responsible->parent();
+
+ return responsible->addChild(newChild,beforeChild);
+ }
+
+ // prevent elements that haven't received a layout yet from getting painted by pushing
+ // them far above the top of the page
+ if (!newChild->isInline())
+ newChild->setPos(newChild->xPos(), -500000);
+
+ if (!newChild->isText() && newChild->style()->position() != STATIC)
+ setOverhangingContents();
+
+ // A block has to either have all of its children inline, or all of its children as blocks.
+ // So, if our children are currently inline and a block child has to be inserted, we move all our
+ // inline children into anonymous block boxes
+ if ( m_childrenInline && !newChild->isInline() && !newChild->isFloatingOrPositioned() )
+ {
+ // This is a block with inline content. Wrap the inline content in anonymous blocks.
+ makeChildrenNonInline(beforeChild);
+ madeBoxesNonInline = true;
+
+ if (beforeChild && beforeChild->parent() != this) {
+ beforeChild = beforeChild->parent();
+ KHTMLAssert(beforeChild->isAnonymousBlock());
+ KHTMLAssert(beforeChild->parent() == this);
+ }
+ }
+ else if (!m_childrenInline && !newChild->isFloatingOrPositioned())
+ {
+ // If we're inserting an inline child but all of our children are blocks, then we have to make sure
+ // it is put into an anomyous block box. We try to use an existing anonymous box if possible, otherwise
+ // a new one is created and inserted into our list of children in the appropriate position.
+ if (newChild->isInline()) {
+ if (beforeChild) {
+ if ( beforeChild->previousSibling() && beforeChild->previousSibling()->isAnonymousBlock() ) {
+ beforeChild->previousSibling()->addChild(newChild);
+ return;
+ }
+ }
+ else {
+ if ( m_last && m_last->isAnonymousBlock() ) {
+ m_last->addChild(newChild);
+ return;
+ }
+ }
+
+ // no suitable existing anonymous box - create a new one
+ RenderBlock* newBox = createAnonymousBlock();
+ RenderBox::addChild(newBox,beforeChild);
+ newBox->addChild(newChild);
+
+ //the above may actually destroy newBox in case an anonymous
+ //table got created, and made the anonymous block redundant.
+ //so look up what to hide indirectly.
+ RenderObject* toHide = newChild;
+ while (toHide->parent() != this)
+ toHide = toHide->parent();
+
+ toHide->setPos(toHide->xPos(), -500000);
+ return;
+ }
+ else {
+ // We are adding another block child... if the current last child is an anonymous box
+ // then it needs to be closed.
+ // ### get rid of the closing thing altogether this will only work during initial parsing
+ if (lastChild() && lastChild()->isAnonymous()) {
+ lastChild()->close();
+ }
+ }
+ }
+
+ RenderBox::addChild(newChild,beforeChild);
+ // ### care about aligned stuff
+
+ if ( madeBoxesNonInline )
+ removeLeftoverAnonymousBoxes();
+}
+
+static void getInlineRun(RenderObject* start, RenderObject* stop,
+ RenderObject*& inlineRunStart,
+ RenderObject*& inlineRunEnd)
+{
+ // Beginning at |start| we find the largest contiguous run of inlines that
+ // we can. We denote the run with start and end points, |inlineRunStart|
+ // and |inlineRunEnd|. Note that these two values may be the same if
+ // we encounter only one inline.
+ //
+ // We skip any non-inlines we encounter as long as we haven't found any
+ // inlines yet.
+ //
+ // |stop| indicates a non-inclusive stop point. Regardless of whether |stop|
+ // is inline or not, we will not include it in a run with inlines before it. It's as though we encountered
+ // a non-inline.
+
+ RenderObject * curr = start;
+ bool sawInline;
+ do {
+ while (curr && !(curr->isInline() || curr->isFloatingOrPositioned()))
+ curr = curr->nextSibling();
+
+ inlineRunStart = inlineRunEnd = curr;
+
+ if (!curr)
+ return; // No more inline children to be found.
+
+ sawInline = curr->isInline();
+
+ curr = curr->nextSibling();
+ while (curr && (curr->isInline() || curr->isFloatingOrPositioned()) && (curr != stop)) {
+ inlineRunEnd = curr;
+ if (curr->isInline())
+ sawInline = true;
+ curr = curr->nextSibling();
+ }
+ } while (!sawInline);
+
+}
+
+void RenderBlock::makeChildrenNonInline(RenderObject *insertionPoint)
+{
+ // makeChildrenNonInline takes a block whose children are *all* inline and it
+ // makes sure that inline children are coalesced under anonymous
+ // blocks. If |insertionPoint| is defined, then it represents the insertion point for
+ // the new block child that is causing us to have to wrap all the inlines. This
+ // means that we cannot coalesce inlines before |insertionPoint| with inlines following
+ // |insertionPoint|, because the new child is going to be inserted in between the inlines,
+ // splitting them.
+ KHTMLAssert(isReplacedBlock() || !isInline());
+ KHTMLAssert(!insertionPoint || insertionPoint->parent() == this);
+
+ m_childrenInline = false;
+
+ RenderObject *child = firstChild();
+
+ while (child) {
+ RenderObject *inlineRunStart, *inlineRunEnd;
+ getInlineRun(child, insertionPoint, inlineRunStart, inlineRunEnd);
+
+ if (!inlineRunStart)
+ break;
+
+ child = inlineRunEnd->nextSibling();
+
+ RenderBlock* box = createAnonymousBlock();
+ insertChildNode(box, inlineRunStart);
+ RenderObject* o = inlineRunStart;
+ while(o != inlineRunEnd)
+ {
+ RenderObject* no = o;
+ o = no->nextSibling();
+ box->appendChildNode(removeChildNode(no));
+ }
+ box->appendChildNode(removeChildNode(inlineRunEnd));
+ box->close();
+ box->setPos(box->xPos(), -500000);
+ }
+}
+
+void RenderBlock::makePageBreakAvoidBlocks()
+{
+ KHTMLAssert(!childrenInline());
+ KHTMLAssert(canvas()->pagedMode());
+
+ RenderObject *breakAfter = firstChild();
+ RenderObject *breakBefore = breakAfter ? breakAfter->nextSibling() : 0;
+
+ RenderBlock* pageRun = 0;
+
+ // ### Should follow margin-collapsing rules, skipping self-collapsing blocks
+ // and exporting page-breaks from first/last child when collapsing with parent margin.
+ while (breakAfter) {
+ if (breakAfter->isRenderBlock() && !breakAfter->childrenInline())
+ static_cast<RenderBlock*>(breakAfter)->makePageBreakAvoidBlocks();
+ EPageBreak pbafter = breakAfter->style()->pageBreakAfter();
+ EPageBreak pbbefore = breakBefore ? breakBefore->style()->pageBreakBefore() : PBALWAYS;
+ if ((pbafter == PBAVOID && pbbefore == PBAVOID) ||
+ (pbafter == PBAVOID && pbbefore == PBAUTO) ||
+ (pbafter == PBAUTO && pbbefore == PBAVOID))
+ {
+ if (!pageRun) {
+ pageRun = createAnonymousBlock();
+ pageRun->m_avoidPageBreak = true;
+ pageRun->setChildrenInline(false);
+ }
+ pageRun->appendChildNode(removeChildNode(breakAfter));
+ } else
+ {
+ if (pageRun) {
+ pageRun->appendChildNode(removeChildNode(breakAfter));
+ pageRun->close();
+ insertChildNode(pageRun, breakBefore);
+ pageRun = 0;
+ }
+ }
+ breakAfter = breakBefore;
+ breakBefore = breakBefore ? breakBefore->nextSibling() : 0;
+ }
+
+ // recurse into positioned block children as well.
+ if (m_positionedObjects) {
+ TQPtrListIterator<RenderObject> it(*m_positionedObjects);
+ for ( ; it.current(); ++it ) {
+ if (it.current()->isRenderBlock() && !it.current()->childrenInline()) {
+ static_cast<RenderBlock*>(it.current())->makePageBreakAvoidBlocks();
+ }
+ }
+ }
+
+ // recurse into floating block children.
+ if (m_floatingObjects) {
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ for ( ; it.current(); ++it ) {
+ if (it.current()->node->isRenderBlock() && !it.current()->node->childrenInline()) {
+ static_cast<RenderBlock*>(it.current()->node)->makePageBreakAvoidBlocks();
+ }
+ }
+ }
+}
+
+void RenderBlock::removeChild(RenderObject *oldChild)
+{
+ // If this child is a block, and if our previous and next siblings are
+ // both anonymous blocks with inline content, then we can go ahead and
+ // fold the inline content back together.
+ RenderObject* prev = oldChild->previousSibling();
+ RenderObject* next = oldChild->nextSibling();
+ bool mergedBlocks = false;
+ if (document()->renderer() && !isInline() && !oldChild->isInline() && !oldChild->continuation() &&
+ prev && prev->isAnonymousBlock() && prev->childrenInline() &&
+ next && next->isAnonymousBlock() && next->childrenInline()) {
+ // Take all the children out of the |next| block and put them in
+ // the |prev| block.
+ RenderObject* o = next->firstChild();
+ while (o) {
+ RenderObject* no = o;
+ o = no->nextSibling();
+ prev->appendChildNode(next->removeChildNode(no));
+ no->setNeedsLayoutAndMinMaxRecalc();
+ }
+ prev->setNeedsLayoutAndMinMaxRecalc();
+
+ // Nuke the now-empty block.
+ next->detach();
+
+ mergedBlocks = true;
+ }
+
+ RenderFlow::removeChild(oldChild);
+
+ if (mergedBlocks && prev && !prev->previousSibling() && !prev->nextSibling()) {
+ // The remerge has knocked us down to containing only a single anonymous
+ // box. We can go ahead and pull the content right back up into our
+ // box.
+ RenderObject* anonBlock = removeChildNode(prev);
+ m_childrenInline = true;
+ RenderObject* o = anonBlock->firstChild();
+ while (o) {
+ RenderObject* no = o;
+ o = no->nextSibling();
+ appendChildNode(anonBlock->removeChildNode(no));
+ no->setNeedsLayoutAndMinMaxRecalc();
+ }
+
+ // Nuke the now-empty block.
+ anonBlock->detach();
+ }
+}
+
+bool RenderBlock::isSelfCollapsingBlock() const
+{
+ // We are not self-collapsing if we
+ // (a) have a non-zero height according to layout (an optimization to avoid wasting time)
+ // (b) are a table,
+ // (c) have border/padding,
+ // (d) have a min-height
+ if (m_height > 0 ||
+ isTable() || (borderBottom() + paddingBottom() + borderTop() + paddingTop()) != 0 ||
+ style()->minHeight().value() > 0)
+ return false;
+
+ bool hasAutoHeight = style()->height().isVariable();
+ if (style()->height().isPercent() && !style()->htmlHacks()) {
+ hasAutoHeight = true;
+ for (RenderBlock* cb = containingBlock(); !cb->isCanvas(); cb = cb->containingBlock()) {
+ if (cb->style()->height().isFixed() || cb->isTableCell())
+ hasAutoHeight = false;
+ }
+ }
+
+ // If the height is 0 or auto, then whether or not we are a self-collapsing block depends
+ // on whether we have content that is all self-collapsing or not.
+ if (hasAutoHeight || ((style()->height().isFixed() || style()->height().isPercent()) && style()->height().value() == 0)) {
+ // If the block has inline children, see if we generated any line boxes. If we have any
+ // line boxes, then we can't be self-collapsing, since we have content.
+ if (childrenInline())
+ return !firstLineBox();
+
+ // Whether or not we collapse is dependent on whether all our normal flow children
+ // are also self-collapsing.
+ for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
+ if (child->isFloatingOrPositioned())
+ continue;
+ if (!child->isSelfCollapsingBlock())
+ return false;
+ }
+ return true;
+ }
+ return false;
+}
+
+void RenderBlock::layout()
+{
+ // Table cells call layoutBlock directly, so don't add any logic here. Put code into
+ // layoutBlock().
+ layoutBlock(false);
+}
+
+void RenderBlock::layoutBlock(bool relayoutChildren)
+{
+ if (isInline() && !isReplacedBlock()) {
+ setNeedsLayout(false);
+ return;
+ }
+ // kdDebug( 6040 ) << renderName() << " " << this << "::layoutBlock() start" << endl;
+ // TQTime t;
+ // t.start();
+ KHTMLAssert( needsLayout() );
+ KHTMLAssert( minMaxKnown() );
+
+ if (canvas()->pagedMode()) relayoutChildren = true;
+
+ if (!relayoutChildren && posChildNeedsLayout() && !normalChildNeedsLayout() && !selfNeedsLayout()) {
+ // All we have to is lay out our positioned objects.
+ layoutPositionedObjects(relayoutChildren);
+ if (hasOverflowClip())
+ m_layer->checkScrollbarsAfterLayout();
+ setNeedsLayout(false);
+ return;
+ }
+
+ if (markedForRepaint()) {
+ repaintDuringLayout();
+ setMarkedForRepaint(false);
+ }
+
+ int oldWidth = m_width;
+
+ calcWidth();
+ m_overflowWidth = m_width;
+ m_overflowLeft = 0;
+ if (style()->direction() == LTR )
+ {
+ int cw=0;
+ if (style()->textIndent().isPercent())
+ cw = containingBlock()->contentWidth();
+ m_overflowLeft = kMin(0, style()->textIndent().minWidth(cw));
+ }
+
+ if ( oldWidth != m_width )
+ relayoutChildren = true;
+
+ // kdDebug( 6040 ) << floatingObjects << "," << oldWidth << ","
+ // << m_width << ","<< needsLayout() << "," << isAnonymousBox() << ","
+ // << overhangingContents() << "," << isPositioned() << endl;
+
+#ifdef DEBUG_LAYOUT
+ kdDebug( 6040 ) << renderName() << "(RenderBlock) " << this << " ::layout() width=" << m_width << ", needsLayout=" << needsLayout() << endl;
+ if(containingBlock() == static_cast<RenderObject *>(this))
+ kdDebug( 6040 ) << renderName() << ": containingBlock == this" << endl;
+#endif
+
+ clearFloats();
+
+ int previousHeight = m_height;
+ m_height = 0;
+ m_overflowHeight = 0;
+ m_clearStatus = CNONE;
+
+ // We use four values, maxTopPos, maxPosNeg, maxBottomPos, and maxBottomNeg, to track
+ // our current maximal positive and negative margins. These values are used when we
+ // are collapsed with adjacent blocks, so for example, if you have block A and B
+ // collapsing together, then you'd take the maximal positive margin from both A and B
+ // and subtract it from the maximal negative margin from both A and B to get the
+ // true collapsed margin. This algorithm is recursive, so when we finish layout()
+ // our block knows its current maximal positive/negative values.
+ //
+ // Start out by setting our margin values to our current margins. Table cells have
+ // no margins, so we don't fill in the values for table cells.
+ if (!isTableCell()) {
+ initMaxMarginValues();
+
+ m_topMarginQuirk = style()->marginTop().isQuirk();
+ m_bottomMarginQuirk = style()->marginBottom().isQuirk();
+
+ if (element() && element()->id() == ID_FORM && static_cast<HTMLFormElementImpl*>(element())->isMalformed())
+ // See if this form is malformed (i.e., unclosed). If so, don't give the form
+ // a bottom margin.
+ m_maxBottomPosMargin = m_maxBottomNegMargin = 0;
+ }
+
+ if (scrollsOverflow() && m_layer) {
+ // For overflow:scroll blocks, ensure we have both scrollbars in place always.
+ if (style()->overflowX() == OSCROLL)
+ m_layer->showScrollbar( Qt::Horizontal, true );
+ if (style()->overflowY() == OSCROLL)
+ m_layer->showScrollbar( Qt::Vertical, true );
+ }
+
+ setContainsPageBreak(false);
+
+ if (childrenInline())
+ layoutInlineChildren( relayoutChildren );
+ else
+ layoutBlockChildren( relayoutChildren );
+
+ // Expand our intrinsic height to encompass floats.
+ int toAdd = borderBottom() + paddingBottom();
+ if (m_layer && scrollsOverflowX() && style()->height().isVariable())
+ toAdd += m_layer->horizontalScrollbarHeight();
+ if ( hasOverhangingFloats() && (isFloatingOrPositioned() || flowAroundFloats()) )
+ m_overflowHeight = m_height = floatBottom() + toAdd;
+
+ int oldHeight = m_height;
+ calcHeight();
+ if (oldHeight != m_height) {
+ m_overflowHeight -= toAdd;
+ if (m_layer && scrollsOverflowY()) {
+ // overflow-height only includes padding-bottom when it scrolls
+ m_overflowHeight += paddingBottom();
+ }
+ // If the block got expanded in size, then increase our overflowheight to match.
+ if (m_overflowHeight < m_height)
+ m_overflowHeight = m_height;
+ }
+ if (previousHeight != m_height)
+ relayoutChildren = true;
+
+ if (isTableCell()) {
+ // Table cells need to grow to accommodate both overhanging floats and
+ // blocks that have overflowed content.
+ // Check for an overhanging float first.
+ // FIXME: This needs to look at the last flow, not the last child.
+ if (lastChild() && lastChild()->hasOverhangingFloats() && !lastChild()->hasOverflowClip()) {
+ KHTMLAssert(lastChild()->isRenderBlock());
+ m_height = lastChild()->yPos() + static_cast<RenderBlock*>(lastChild())->floatBottom();
+ m_height += borderBottom() + paddingBottom();
+ }
+
+ if (m_overflowHeight > m_height && !hasOverflowClip())
+ m_height = m_overflowHeight + borderBottom() + paddingBottom();
+ }
+
+ if( hasOverhangingFloats() && ((isFloating() && style()->height().isVariable()) || isTableCell())) {
+ m_height = floatBottom();
+ m_height += borderBottom() + paddingBottom();
+ }
+
+ if (canvas()->pagedMode()) {
+#ifdef PAGE_DEBUG
+ kdDebug(6040) << renderName() << " Page Bottom: " << pageTopAfter(0) << endl;
+ kdDebug(6040) << renderName() << " Bottom: " << m_height << endl;
+#endif
+ bool needsPageBreak = false;
+ int xpage = crossesPageBreak(0, m_height);
+ if (xpage) {
+ needsPageBreak = true;
+#ifdef PAGE_DEBUG
+ kdDebug( 6040 ) << renderName() << " crosses to page " << xpage << endl;
+#endif
+ }
+ if (needsPageBreak && !containsPageBreak()) {
+ setNeedsPageClear(true);
+#ifdef PAGE_DEBUG
+ kdDebug( 6040 ) << renderName() << " marked for page-clear" << endl;
+#endif
+ }
+ }
+
+ layoutPositionedObjects( relayoutChildren );
+
+ // Always ensure our overflow width/height are at least as large as our width/height.
+ m_overflowWidth = kMax(m_overflowWidth, (int)m_width);
+ m_overflowHeight = kMax(m_overflowHeight, m_height);
+
+ // Update our scrollbars if we're overflow:auto/scroll now that we know if
+ // we overflow or not.
+ if (hasOverflowClip() && m_layer)
+ m_layer->checkScrollbarsAfterLayout();
+
+ setNeedsLayout(false);
+}
+
+void RenderBlock::adjustPositionedBlock(RenderObject* child, const MarginInfo& marginInfo)
+{
+ if (child->isBox() && child->hasStaticX()) {
+ if (style()->direction() == LTR)
+ static_cast<RenderBox*>(child)->setStaticX(borderLeft() + paddingLeft());
+ else
+ static_cast<RenderBox*>(child)->setStaticX(borderRight() + paddingRight());
+ }
+
+ if (child->isBox() && child->hasStaticY()) {
+ int y = m_height;
+ if (!marginInfo.canCollapseWithTop()) {
+ child->calcVerticalMargins();
+ int marginTop = child->marginTop();
+ int collapsedTopPos = marginInfo.posMargin();
+ int collapsedTopNeg = marginInfo.negMargin();
+ if (marginTop > 0) {
+ if (marginTop > collapsedTopPos)
+ collapsedTopPos = marginTop;
+ } else {
+ if (-marginTop > collapsedTopNeg)
+ collapsedTopNeg = -marginTop;
+ }
+ y += (collapsedTopPos - collapsedTopNeg) - marginTop;
+ }
+ static_cast<RenderBox*>(child)->setStaticY(y);
+ }
+}
+
+void RenderBlock::adjustFloatingBlock(const MarginInfo& marginInfo)
+{
+ // The float should be positioned taking into account the bottom margin
+ // of the previous flow. We add that margin into the height, get the
+ // float positioned properly, and then subtract the margin out of the
+ // height again. In the case of self-collapsing blocks, we always just
+ // use the top margins, since the self-collapsing block collapsed its
+ // own bottom margin into its top margin.
+ //
+ // Note also that the previous flow may collapse its margin into the top of
+ // our block. If this is the case, then we do not add the margin in to our
+ // height when computing the position of the float. This condition can be tested
+ // for by simply calling canCollapseWithTop. See
+ // http://www.hixie.ch/tests/adhoc/css/box/block/margin-collapse/046.html for
+ // an example of this scenario.
+ int marginOffset = marginInfo.canCollapseWithTop() ? 0 : marginInfo.margin();
+ m_height += marginOffset;
+ positionNewFloats();
+ m_height -= marginOffset;
+}
+
+RenderObject* RenderBlock::handleSpecialChild(RenderObject* child, const MarginInfo& marginInfo, CompactInfo& compactInfo, bool& handled)
+{
+ // Handle positioned children first.
+ RenderObject* next = handlePositionedChild(child, marginInfo, handled);
+ if (handled) return next;
+
+ // Handle floating children next.
+ next = handleFloatingChild(child, marginInfo, handled);
+ if (handled) return next;
+
+ // See if we have a compact element. If we do, then try to tuck the compact element into the margin space of the next block.
+ next = handleCompactChild(child, compactInfo, marginInfo, handled);
+ if (handled) return next;
+
+ // Finally, see if we have a run-in element.
+ return handleRunInChild(child, handled);
+}
+
+RenderObject* RenderBlock::handlePositionedChild(RenderObject* child, const MarginInfo& marginInfo, bool& handled)
+{
+ if (child->isPositioned()) {
+ handled = true;
+ child->containingBlock()->insertPositionedObject(child);
+ adjustPositionedBlock(child, marginInfo);
+ return child->nextSibling();
+ }
+ return 0;
+}
+
+RenderObject* RenderBlock::handleFloatingChild(RenderObject* child, const MarginInfo& marginInfo, bool& handled)
+{
+ if (child->isFloating()) {
+ handled = true;
+ insertFloatingObject(child);
+ adjustFloatingBlock(marginInfo);
+ return child->nextSibling();
+ }
+ return 0;
+}
+
+static inline bool isAnonymousWhitespace( RenderObject* o ) {
+ if (!o->isAnonymous())
+ return false;
+ RenderObject *fc = o->firstChild();
+ return fc && fc == o->lastChild() && fc->isText() && static_cast<RenderText *>(fc)->stringLength() == 1 &&
+ static_cast<RenderText *>(fc)->text()[0].unicode() == ' ';
+}
+
+RenderObject* RenderBlock::handleCompactChild(RenderObject* child, CompactInfo& compactInfo, const MarginInfo& marginInfo, bool& handled)
+{
+ // FIXME: We only deal with one compact at a time. It is unclear what should be
+ // done if multiple contiguous compacts are encountered. For now we assume that
+ // compact A followed by another compact B should simply be treated as block A.
+ if (child->isCompact() && !compactInfo.compact() && (child->childrenInline() || child->isReplaced())) {
+ // Get the next non-positioned/non-floating RenderBlock.
+ RenderObject* next = child->nextSibling();
+ RenderObject* curr = next;
+ while (curr && (curr->isFloatingOrPositioned() || isAnonymousWhitespace(curr)) )
+ curr = curr->nextSibling();
+ if (curr && curr->isRenderBlock() && !curr->isCompact() && !curr->isRunIn()) {
+ curr->calcWidth(); // So that horizontal margins are correct.
+ // Need to compute margins for the child as though it is a block.
+ child->style()->setDisplay(BLOCK);
+ child->calcWidth();
+ child->style()->setDisplay(COMPACT);
+
+ int childMargins = child->marginLeft() + child->marginRight();
+ int margin = style()->direction() == LTR ? curr->marginLeft() : curr->marginRight();
+ if (margin >= (childMargins + child->maxWidth())) {
+ // The compact will fit in the margin.
+ handled = true;
+ compactInfo.set(child, curr);
+ child->layoutIfNeeded();
+ int off = marginInfo.margin();
+ m_height += off + curr->marginTop() < child->marginTop() ?
+ child->marginTop() - curr->marginTop() -off: 0;
+
+ child->setPos(0,0); // This position will be updated to reflect the compact's
+ // desired position and the line box for the compact will
+ // pick that position up.
+ return next;
+ }
+ }
+ }
+ return 0;
+}
+
+void RenderBlock::adjustSizeForCompactIfNeeded(RenderObject* child, CompactInfo& compactInfo)
+{
+ // if the compact is bigger than the block it was run into
+ // then "this" block should take the height of the compact
+ if (compactInfo.matches(child)) {
+ // We have a compact child to squeeze in.
+ RenderObject* compactChild = compactInfo.compact();
+ if (compactChild->height() > child->height())
+ m_height += compactChild->height() - child->height();
+ }
+}
+
+void RenderBlock::insertCompactIfNeeded(RenderObject* child, CompactInfo& compactInfo)
+{
+ if (compactInfo.matches(child)) {
+ // We have a compact child to squeeze in.
+ RenderObject* compactChild = compactInfo.compact();
+ int compactXPos = borderLeft() + paddingLeft() + compactChild->marginLeft();
+ if (style()->direction() == RTL) {
+ compactChild->calcWidth(); // have to do this because of the capped maxwidth
+ compactXPos = width() - borderRight() - paddingRight() -
+ compactChild->width() - compactChild->marginRight();
+ }
+
+ int compactYPos = child->yPos() + child->borderTop() + child->paddingTop()
+ - compactChild->paddingTop() - compactChild->borderTop();
+ int adj = 0;
+ KHTMLAssert(child->isRenderBlock());
+ InlineRunBox *b = static_cast<RenderBlock*>(child)->firstLineBox();
+ InlineRunBox *c = static_cast<RenderBlock*>(compactChild)->firstLineBox();
+ if (b && c) {
+ // adjust our vertical position
+ int vpos = compactChild->getVerticalPosition( true, child );
+ if (vpos == PositionBottom)
+ adj = b->height() > c->height() ? (b->height() + b->yPos() - c->height() - c->yPos()) : 0;
+ else if (vpos == PositionTop)
+ adj = b->yPos() - c->yPos();
+ else
+ adj = vpos;
+ compactYPos += adj;
+ }
+ Length newLineHeight( kMax(compactChild->lineHeight(true)+adj, (int)child->lineHeight(true)), tdehtml::Fixed);
+ child->style()->setLineHeight( newLineHeight );
+ child->setNeedsLayout( true, false );
+ child->layout();
+
+ compactChild->setPos(compactXPos, compactYPos); // Set the x position.
+ compactInfo.clear();
+ }
+}
+
+RenderObject* RenderBlock::handleRunInChild(RenderObject* child, bool& handled)
+{
+ // See if we have a run-in element with inline children. If the
+ // children aren't inline, then just treat the run-in as a normal
+ // block.
+ if (child->isRunIn() && (child->childrenInline() || child->isReplaced())) {
+ // Get the next non-positioned/non-floating RenderBlock.
+ RenderObject* curr = child->nextSibling();
+ while (curr && (curr->isFloatingOrPositioned() || isAnonymousWhitespace(curr)) )
+ curr = curr->nextSibling();
+ if (curr && (curr->isRenderBlock() && curr->childrenInline() && !curr->isCompact() && !curr->isRunIn())) {
+ // The block acts like an inline, so just null out its
+ // position.
+ handled = true;
+ child->setInline(true);
+ child->setPos(0,0);
+
+ // Remove the child.
+ RenderObject* next = child->nextSibling();
+ removeChildNode(child);
+
+ // Now insert the child under |curr|.
+ curr->insertChildNode(child, curr->firstChild());
+ return next;
+ }
+ }
+ return 0;
+}
+
+void RenderBlock::collapseMargins(RenderObject* child, MarginInfo& marginInfo, int yPosEstimate)
+{
+ // Get our max pos and neg top margins.
+ int posTop = child->maxTopMargin(true);
+ int negTop = child->maxTopMargin(false);
+
+ // For self-collapsing blocks, collapse our bottom margins into our
+ // top to get new posTop and negTop values.
+ if (child->isSelfCollapsingBlock()) {
+ posTop = kMax(posTop, (int)child->maxBottomMargin(true));
+ negTop = kMax(negTop, (int)child->maxBottomMargin(false));
+ }
+
+ // See if the top margin is quirky. We only care if this child has
+ // margins that will collapse with us.
+ bool topQuirk = child->isTopMarginQuirk() /*|| style()->marginTopCollapse() == MDISCARD*/;
+
+ if (marginInfo.canCollapseWithTop()) {
+ // This child is collapsing with the top of the
+ // block. If it has larger margin values, then we need to update
+ // our own maximal values.
+ if (!style()->htmlHacks() || !marginInfo.quirkContainer() || !topQuirk) {
+ m_maxTopPosMargin = kMax(posTop, (int)m_maxTopPosMargin);
+ m_maxTopNegMargin = kMax(negTop, (int)m_maxTopNegMargin);
+ }
+
+ // The minute any of the margins involved isn't a quirk, don't
+ // collapse it away, even if the margin is smaller (www.webreference.com
+ // has an example of this, a <dt> with 0.8em author-specified inside
+ // a <dl> inside a <td>.
+ if (!marginInfo.determinedTopQuirk() && !topQuirk && (posTop-negTop)) {
+ m_topMarginQuirk = false;
+ marginInfo.setDeterminedTopQuirk(true);
+ }
+
+ if (!marginInfo.determinedTopQuirk() && topQuirk && marginTop() == 0)
+ // We have no top margin and our top child has a quirky margin.
+ // We will pick up this quirky margin and pass it through.
+ // This deals with the <td><div><p> case.
+ // Don't do this for a block that split two inlines though. You do
+ // still apply margins in this case.
+ m_topMarginQuirk = true;
+ }
+
+ if (marginInfo.quirkContainer() && marginInfo.atTopOfBlock() && (posTop - negTop))
+ marginInfo.setTopQuirk(topQuirk);
+
+ int ypos = m_height;
+ if (child->isSelfCollapsingBlock()) {
+ // This child has no height. We need to compute our
+ // position before we collapse the child's margins together,
+ // so that we can get an accurate position for the zero-height block.
+ int collapsedTopPos = kMax(marginInfo.posMargin(), (int)child->maxTopMargin(true));
+ int collapsedTopNeg = kMax(marginInfo.negMargin(), (int)child->maxTopMargin(false));
+ marginInfo.setMargin(collapsedTopPos, collapsedTopNeg);
+
+ // Now collapse the child's margins together, which means examining our
+ // bottom margin values as well.
+ marginInfo.setPosMarginIfLarger(child->maxBottomMargin(true));
+ marginInfo.setNegMarginIfLarger(child->maxBottomMargin(false));
+
+ if (!marginInfo.canCollapseWithTop())
+ // We need to make sure that the position of the self-collapsing block
+ // is correct, since it could have overflowing content
+ // that needs to be positioned correctly (e.g., a block that
+ // had a specified height of 0 but that actually had subcontent).
+ ypos = m_height + collapsedTopPos - collapsedTopNeg;
+ }
+ else {
+#ifdef APPLE_CHANGES
+ if (child->style()->marginTopCollapse() == MSEPARATE) {
+ m_height += marginInfo.margin() + child->marginTop();
+ ypos = m_height;
+ }
+ else
+#endif
+ if (!marginInfo.atTopOfBlock() ||
+ (!marginInfo.canCollapseTopWithChildren()
+ && (!style()->htmlHacks() || !marginInfo.quirkContainer() || !marginInfo.topQuirk()))) {
+ // We're collapsing with a previous sibling's margins and not
+ // with the top of the block.
+ m_height += kMax(marginInfo.posMargin(), posTop) - kMax(marginInfo.negMargin(), negTop);
+ ypos = m_height;
+ }
+
+ marginInfo.setPosMargin(child->maxBottomMargin(true));
+ marginInfo.setNegMargin(child->maxBottomMargin(false));
+
+ if (marginInfo.margin())
+ marginInfo.setBottomQuirk(child->isBottomMarginQuirk() /*|| style()->marginBottomCollapse() == MDISCARD*/);
+
+ marginInfo.setSelfCollapsingBlockClearedFloat(false);
+ }
+
+ child->setPos(child->xPos(), ypos);
+ if (ypos != yPosEstimate) {
+ if (child->style()->width().isPercent() && child->usesLineWidth())
+ // The child's width is a percentage of the line width.
+ // When the child shifts to clear an item, its width can
+ // change (because it has more available line width).
+ // So go ahead and mark the item as dirty.
+ child->setChildNeedsLayout(true);
+
+ if (!child->flowAroundFloats() && child->hasFloats())
+ child->markAllDescendantsWithFloatsForLayout();
+
+ // Our guess was wrong. Make the child lay itself out again.
+ child->layoutIfNeeded();
+ }
+}
+
+void RenderBlock::clearFloatsIfNeeded(RenderObject* child, MarginInfo& marginInfo, int oldTopPosMargin, int oldTopNegMargin)
+{
+ int heightIncrease = getClearDelta(child);
+ if (heightIncrease) {
+ // The child needs to be lowered. Move the child so that it just clears the float.
+ child->setPos(child->xPos(), child->yPos() + heightIncrease);
+
+ // Increase our height by the amount we had to clear.
+ bool selfCollapsing = child->isSelfCollapsingBlock();
+ if (!selfCollapsing)
+ m_height += heightIncrease;
+ else {
+ // For self-collapsing blocks that clear, they may end up collapsing
+ // into the bottom of the parent block. We simulate this behavior by
+ // setting our positive margin value to compensate for the clear.
+ marginInfo.setPosMargin(kMax(0, child->yPos() - m_height));
+ marginInfo.setNegMargin(0);
+ marginInfo.setSelfCollapsingBlockClearedFloat(true);
+ }
+
+ if (marginInfo.canCollapseWithTop()) {
+ // We can no longer collapse with the top of the block since a clear
+ // occurred. The empty blocks collapse into the cleared block.
+ // FIXME: This isn't quite correct. Need clarification for what to do
+ // if the height the cleared block is offset by is smaller than the
+ // margins involved.
+ m_maxTopPosMargin = oldTopPosMargin;
+ m_maxTopNegMargin = oldTopNegMargin;
+ marginInfo.setAtTopOfBlock(false);
+ }
+
+ // If our value of clear caused us to be repositioned vertically to be
+ // underneath a float, we might have to do another layout to take into account
+ // the extra space we now have available.
+ if (!selfCollapsing && !child->style()->width().isFixed() && child->usesLineWidth())
+ // The child's width is a percentage of the line width.
+ // When the child shifts to clear an item, its width can
+ // change (because it has more available line width).
+ // So go ahead and mark the item as dirty.
+ child->setChildNeedsLayout(true);
+ if (!child->flowAroundFloats() && child->hasFloats())
+ child->markAllDescendantsWithFloatsForLayout();
+ child->layoutIfNeeded();
+ }
+}
+
+bool RenderBlock::canClear(RenderObject *child, PageBreakLevel level)
+{
+ KHTMLAssert(child->parent() && child->parent() == this);
+ KHTMLAssert(canvas()->pagedMode());
+
+ // Positioned elements cannot be moved. Only normal flow and floating.
+ if (child->isPositioned() || child->isRelPositioned()) return false;
+
+ switch(level) {
+ case PageBreakNormal:
+ // check page-break-inside: avoid
+ if (!style()->pageBreakInside())
+ // we cannot, but can our parent?
+ if(!parent()->canClear(this, level)) return false;
+ case PageBreakHarder:
+ // check page-break-after/before: avoid
+ if (m_avoidPageBreak)
+ // we cannot, but can our parent?
+ if(!parent()->canClear(this, level)) return false;
+ case PageBreakForced:
+ // child is larger than page-height and is forced to break
+ if(child->height() > canvas()->pageHeight()) return false;
+ return true;
+ }
+ assert(false);
+ return false;
+}
+
+void RenderBlock::clearPageBreak(RenderObject* child, int pageBottom)
+{
+ KHTMLAssert(child->parent() && child->parent() == this);
+ KHTMLAssert(canvas()->pagedMode());
+
+ if (child->yPos() >= pageBottom) return;
+
+ int heightIncrease = 0;
+
+ heightIncrease = pageBottom - child->yPos();
+
+ // ### should never happen, canClear should have been called to detect it.
+ if (child->height() > canvas()->pageHeight()) {
+ kdDebug(6040) << "### child is too large to clear: " << child->height() << " > " << canvas()->pageHeight() << endl;
+ return;
+ }
+
+ // The child needs to be lowered. Move the child so that it just clears the break.
+ child->setPos(child->xPos(), pageBottom);
+
+#ifdef PAGE_DEBUG
+ kdDebug(6040) << "Cleared block " << heightIncrease << "px" << endl;
+#endif
+
+ // Increase our height by the amount we had to clear.
+ m_height += heightIncrease;
+
+ // We might have to do another layout to take into account
+ // the extra space we now have available.
+ if (!child->style()->width().isFixed() && child->usesLineWidth())
+ // The child's width is a percentage of the line width.
+ // When the child shifts to clear a page-break, its width can
+ // change (because it has more available line width).
+ // So go ahead and mark the item as dirty.
+ child->setChildNeedsLayout(true);
+ if (!child->flowAroundFloats() && child->hasFloats())
+ child->markAllDescendantsWithFloatsForLayout();
+ if (child->containsPageBreak())
+ child->setNeedsLayout(true);
+ child->layoutIfNeeded();
+
+ child->setAfterPageBreak(true);
+}
+
+int RenderBlock::estimateVerticalPosition(RenderObject* child, const MarginInfo& marginInfo)
+{
+ // FIXME: We need to eliminate the estimation of vertical position, because
+ // when it's wrong we sometimes trigger a pathological relayout if there are
+ // intruding floats.
+ int yPosEstimate = m_height;
+ if (!marginInfo.canCollapseWithTop()) {
+ int childMarginTop = child->selfNeedsLayout() ? child->marginTop() : child->collapsedMarginTop();
+ yPosEstimate += kMax(marginInfo.margin(), childMarginTop);
+ }
+ return yPosEstimate;
+}
+
+void RenderBlock::determineHorizontalPosition(RenderObject* child)
+{
+ if (style()->direction() == LTR) {
+ int xPos = borderLeft() + paddingLeft();
+
+ // Add in our left margin.
+ int chPos = xPos + child->marginLeft();
+
+ // Some objects (e.g., tables, horizontal rules, overflow:auto blocks) avoid floats. They need
+ // to shift over as necessary to dodge any floats that might get in the way.
+ if (child->flowAroundFloats()) {
+ int leftOff = leftOffset(m_height);
+ if (style()->textAlign() != KHTML_CENTER && !child->style()->marginLeft().isVariable()) {
+ if (child->marginLeft() < 0)
+ leftOff += child->marginLeft();
+ chPos = kMax(chPos, leftOff); // Let the float sit in the child's margin if it can fit.
+ }
+ else if (leftOff != xPos) {
+ // The object is shifting right. The object might be centered, so we need to
+ // recalculate our horizontal margins. Note that the containing block content
+ // width computation will take into account the delta between |leftOff| and |xPos|
+ // so that we can just pass the content width in directly to the |calcHorizontalMargins|
+ // function.
+ static_cast<RenderBox*>(child)->calcHorizontalMargins(child->style()->marginLeft(), child->style()->marginRight(), lineWidth(child->yPos()));
+ chPos = leftOff + child->marginLeft();
+ }
+ }
+
+ child->setPos(chPos, child->yPos());
+ } else {
+ int xPos = m_width - borderRight() - paddingRight();
+ if (m_layer && scrollsOverflowY())
+ xPos -= m_layer->verticalScrollbarWidth();
+ int chPos = xPos - (child->width() + child->marginRight());
+ if (child->flowAroundFloats()) {
+ int rightOff = rightOffset(m_height);
+ if (style()->textAlign() != KHTML_CENTER && !child->style()->marginRight().isVariable()) {
+ if (child->marginRight() < 0)
+ rightOff -= child->marginRight();
+ chPos = kMin(chPos, rightOff - child->width()); // Let the float sit in the child's margin if it can fit.
+ } else if (rightOff != xPos) {
+ // The object is shifting left. The object might be centered, so we need to
+ // recalculate our horizontal margins. Note that the containing block content
+ // width computation will take into account the delta between |rightOff| and |xPos|
+ // so that we can just pass the content width in directly to the |calcHorizontalMargins|
+ // function.
+ static_cast<RenderBox*>(child)->calcHorizontalMargins(child->style()->marginLeft(), child->style()->marginRight(), lineWidth(child->yPos()));
+ chPos = rightOff - child->marginRight() - child->width();
+ }
+ }
+ child->setPos(chPos, child->yPos());
+ }
+}
+
+void RenderBlock::setCollapsedBottomMargin(const MarginInfo& marginInfo)
+{
+ if (marginInfo.canCollapseWithBottom() && !marginInfo.canCollapseWithTop()) {
+ // Update our max pos/neg bottom margins, since we collapsed our bottom margins
+ // with our children.
+ m_maxBottomPosMargin = kMax((int)m_maxBottomPosMargin, marginInfo.posMargin());
+ m_maxBottomNegMargin = kMax((int)m_maxBottomNegMargin, marginInfo.negMargin());
+
+ if (!marginInfo.bottomQuirk())
+ m_bottomMarginQuirk = false;
+
+ if (marginInfo.bottomQuirk() && marginBottom() == 0)
+ // We have no bottom margin and our last child has a quirky margin.
+ // We will pick up this quirky margin and pass it through.
+ // This deals with the <td><div><p> case.
+ m_bottomMarginQuirk = true;
+ }
+}
+
+void RenderBlock::handleBottomOfBlock(int top, int bottom, MarginInfo& marginInfo)
+{
+ // If our last flow was a self-collapsing block that cleared a float, then we don't
+ // collapse it with the bottom of the block.
+ if (!marginInfo.selfCollapsingBlockClearedFloat())
+ marginInfo.setAtBottomOfBlock(true);
+
+ // If we can't collapse with children then go ahead and add in the bottom margin.
+ if (!marginInfo.canCollapseWithBottom() && !marginInfo.canCollapseWithTop()
+ && (!style()->htmlHacks() || !marginInfo.quirkContainer() || !marginInfo.bottomQuirk()))
+ m_height += marginInfo.margin();
+
+ // Now add in our bottom border/padding.
+ m_height += bottom;
+
+ // Negative margins can cause our height to shrink below our minimal height (border/padding).
+ // If this happens, ensure that the computed height is increased to the minimal height.
+ m_height = kMax(m_height, top + bottom);
+
+ // Always make sure our overflow height is at least our height.
+ m_overflowHeight = kMax(m_height, m_overflowHeight);
+
+ // Update our bottom collapsed margin info.
+ setCollapsedBottomMargin(marginInfo);
+}
+
+void RenderBlock::layoutBlockChildren( bool relayoutChildren )
+{
+#ifdef DEBUG_LAYOUT
+ kdDebug( 6040 ) << renderName() << " layoutBlockChildren( " << this <<" ), relayoutChildren="<< relayoutChildren << endl;
+#endif
+
+ int top = borderTop() + paddingTop();
+ int bottom = borderBottom() + paddingBottom();
+ if (m_layer && scrollsOverflowX() && style()->height().isVariable())
+ bottom += m_layer->horizontalScrollbarHeight();
+
+ m_height = m_overflowHeight = top;
+
+ // The margin struct caches all our current margin collapsing state.
+ // The compact struct caches state when we encounter compacts.
+ MarginInfo marginInfo(this, top, bottom);
+ CompactInfo compactInfo;
+
+ // Fieldsets need to find their legend and position it inside the border of the object.
+ // The legend then gets skipped during normal layout.
+ RenderObject* legend = layoutLegend(relayoutChildren);
+
+ PageBreakInfo pageBreakInfo(pageTopAfter(0));
+
+ RenderObject* child = firstChild();
+ while( child != 0 )
+ {
+ if (legend == child) {
+ child = child->nextSibling();
+ continue; // Skip the legend, since it has already been positioned up in the fieldset's border.
+ }
+
+ int oldTopPosMargin = m_maxTopPosMargin;
+ int oldTopNegMargin = m_maxTopNegMargin;
+
+ // make sure we relayout children if we need it.
+ if (!child->isPositioned() && (relayoutChildren ||
+ (child->isReplaced() && (child->style()->width().isPercent() || child->style()->height().isPercent())) ||
+ (child->isRenderBlock() && child->style()->height().isPercent()) ||
+ (child->isBody() && child->style()->htmlHacks())))
+ {
+ child->setChildNeedsLayout(true);
+ }
+
+ // Handle the four types of special elements first. These include positioned content, floating content, compacts and
+ // run-ins. When we encounter these four types of objects, we don't actually lay them out as normal flow blocks.
+ bool handled = false;
+ RenderObject* next = handleSpecialChild(child, marginInfo, compactInfo, handled);
+ if (handled) { child = next; continue; }
+
+ // The child is a normal flow object. Compute its vertical margins now.
+ child->calcVerticalMargins();
+
+#ifdef APPLE_CHANGES /* margin-*-collapse not merged yet */
+ // Do not allow a collapse if the margin top collapse style is set to SEPARATE.
+ if (child->style()->marginTopCollapse() == MSEPARATE) {
+ marginInfo.setAtTopOfBlock(false);
+ marginInfo.clearMargin();
+ }
+#endif
+
+ // Try to guess our correct y position. In most cases this guess will
+ // be correct. Only if we're wrong (when we compute the real y position)
+ // will we have to potentially relayout.
+ int yPosEstimate = estimateVerticalPosition(child, marginInfo);
+
+ // If an element might be affected by the presence of floats, then always mark it for
+ // layout.
+ if ( !child->flowAroundFloats() || child->usesLineWidth() ) {
+ int fb = floatBottom();
+ if (fb > m_height || fb > yPosEstimate)
+ child->setChildNeedsLayout(true);
+ }
+
+ // Go ahead and position the child as though it didn't collapse with the top.
+ child->setPos(child->xPos(), yPosEstimate);
+ child->layoutIfNeeded();
+
+ // Now determine the correct ypos based on examination of collapsing margin
+ // values.
+ collapseMargins(child, marginInfo, yPosEstimate);
+
+ // Now check for clear.
+ clearFloatsIfNeeded(child, marginInfo, oldTopPosMargin, oldTopNegMargin);
+
+ // We are no longer at the top of the block if we encounter a non-empty child.
+ // This has to be done after checking for clear, so that margins can be reset if a clear occurred.
+ if (marginInfo.atTopOfBlock() && !child->isSelfCollapsingBlock())
+ marginInfo.setAtTopOfBlock(false);
+
+ // Now place the child in the correct horizontal position
+ determineHorizontalPosition(child);
+
+ adjustSizeForCompactIfNeeded(child, compactInfo);
+ // Update our height now that the child has been placed in the correct position.
+ m_height += child->height();
+
+#ifdef APPLE_CHANGES
+ if (child->style()->marginBottomCollapse() == MSEPARATE) {
+ m_height += child->marginBottom();
+ marginInfo.clearMargin();
+ }
+#endif
+
+ // Check for page-breaks
+ if (canvas()->pagedMode())
+ clearChildOfPageBreaks(child, pageBreakInfo, marginInfo);
+
+ if (child->hasOverhangingFloats() && !child->flowAroundFloats()) {
+ // need to add the child's floats to our floating objects list, but not in the case where
+ // overflow is auto/scroll
+ addOverHangingFloats( static_cast<RenderBlock *>(child), -child->xPos(), -child->yPos(), true );
+ }
+
+ // See if this child has made our overflow need to grow.
+ int effX = child->effectiveXPos();
+ int effY = child->effectiveYPos();
+ m_overflowWidth = kMax(effX + child->effectiveWidth(), m_overflowWidth);
+ m_overflowLeft = kMin(effX, m_overflowLeft);
+ m_overflowHeight = kMax(effY + child->effectiveHeight(), m_overflowHeight);
+ m_overflowTop = kMin(effY, m_overflowTop);
+
+ // Insert our compact into the block margin if we have one.
+ insertCompactIfNeeded(child, compactInfo);
+
+ child = child->nextSibling();
+ }
+
+ // The last child had forced page-break-after
+ if (pageBreakInfo.forcePageBreak())
+ m_height = pageBreakInfo.pageBottom();
+
+ // Now do the handling of the bottom of the block, adding in our bottom border/padding and
+ // determining the correct collapsed bottom margin information.
+ handleBottomOfBlock(top, bottom, marginInfo);
+
+ setNeedsLayout(false);
+}
+
+void RenderBlock::clearChildOfPageBreaks(RenderObject *child, PageBreakInfo &pageBreakInfo, MarginInfo &marginInfo)
+{
+ (void)marginInfo;
+ int childTop = child->yPos();
+ int childBottom = child->yPos()+child->height();
+#ifdef PAGE_DEBUG
+ kdDebug(6040) << renderName() << " ChildTop: " << childTop << " ChildBottom: " << childBottom << endl;
+#endif
+
+ bool forcePageBreak = pageBreakInfo.forcePageBreak() || child->style()->pageBreakBefore() == PBALWAYS;
+#ifdef PAGE_DEBUG
+ if (forcePageBreak)
+ kdDebug(6040) << renderName() << "Forced break required" << endl;
+#endif
+
+ int xpage = crossesPageBreak(childTop, childBottom);
+ if (xpage || forcePageBreak)
+ {
+ if (!forcePageBreak && child->containsPageBreak() && !child->needsPageClear()) {
+#ifdef PAGE_DEBUG
+ kdDebug(6040) << renderName() << " Child contains page-break to page " << xpage << endl;
+#endif
+ // ### Actually this assumes floating children are breaking/clearing
+ // nicely as well.
+ setContainsPageBreak(true);
+ }
+ else {
+ bool doBreak = true;
+ // don't break before the first child or when page-break-inside is avoid
+ if (!forcePageBreak && (!style()->pageBreakInside() || m_avoidPageBreak || child == firstChild())) {
+ if (parent()->canClear(this, (m_avoidPageBreak) ? PageBreakHarder : PageBreakNormal )) {
+#ifdef PAGE_DEBUG
+ kdDebug(6040) << renderName() << "Avoid page-break inside" << endl;
+#endif
+ child->setNeedsPageClear(false);
+ setNeedsPageClear(true);
+ doBreak = false;
+ }
+#ifdef PAGE_DEBUG
+ else
+ kdDebug(6040) << renderName() << "Ignoring page-break avoid" << endl;
+#endif
+ }
+ if (doBreak) {
+#ifdef PAGE_DEBUG
+ kdDebug(6040) << renderName() << " Clearing child of page-break" << endl;
+ kdDebug(6040) << renderName() << " child top of page " << xpage << endl;
+#endif
+ clearPageBreak(child, pageBreakInfo.pageBottom());
+ child->setNeedsPageClear(false);
+ setContainsPageBreak(true);
+ }
+ }
+ pageBreakInfo.setPageBottom(pageBreakInfo.pageBottom() + canvas()->pageHeight());
+ }
+ else
+ if (child->yPos() >= pageBreakInfo.pageBottom()) {
+ bool doBreak = true;
+#ifdef PAGE_DEBUG
+ kdDebug(6040) << "Page-break between children" << endl;
+#endif
+ if (!style()->pageBreakInside() || m_avoidPageBreak) {
+ if(parent()->canClear(this, (m_avoidPageBreak) ? PageBreakHarder : PageBreakNormal )) {
+#ifdef PAGE_DEBUG
+ kdDebug(6040) << "Avoid page-break inside" << endl;
+#endif
+ child->setNeedsPageClear(false);
+ setNeedsPageClear(true);
+ doBreak = false;
+ }
+#ifdef PAGE_DEBUG
+ else
+ kdDebug(6040) << "Ignoring page-break avoid" << endl;
+#endif
+ }
+ if (doBreak) {
+ // Break between children
+ setContainsPageBreak(true);
+ // ### Should collapse top-margin with page-margin
+ }
+ pageBreakInfo.setPageBottom(pageBreakInfo.pageBottom() + canvas()->pageHeight());
+ }
+
+ // Do we need a forced page-break before next child?
+ pageBreakInfo.setForcePageBreak(false);
+ if (child->style()->pageBreakAfter() == PBALWAYS)
+ pageBreakInfo.setForcePageBreak(true);
+}
+
+void RenderBlock::layoutPositionedObjects(bool relayoutChildren)
+{
+ if (m_positionedObjects) {
+ //kdDebug( 6040 ) << renderName() << " " << this << "::layoutPositionedObjects() start" << endl;
+ RenderObject* r;
+ TQPtrListIterator<RenderObject> it(*m_positionedObjects);
+ for ( ; (r = it.current()); ++it ) {
+ //kdDebug(6040) << " have a positioned object" << endl;
+ if (r->markedForRepaint()) {
+ r->repaintDuringLayout();
+ r->setMarkedForRepaint(false);
+ }
+ if ( relayoutChildren || r->style()->position() == FIXED ||
+ ((r->hasStaticY()||r->hasStaticX()) && r->parent() != this && r->parent()->isBlockFlow()) ) {
+ r->setChildNeedsLayout(true);
+ r->dirtyFormattingContext(false);
+ }
+ r->layoutIfNeeded();
+ }
+ }
+}
+
+void RenderBlock::paint(PaintInfo& pI, int _tx, int _ty)
+{
+ _tx += m_x;
+ _ty += m_y;
+
+ // check if we need to do anything at all...
+ if (!isRoot() && !isInlineFlow() && !overhangingContents() && !isRelPositioned() && !isPositioned() )
+ {
+ int h = m_overflowHeight;
+ int yPos = _ty;
+ if (m_floatingObjects && floatBottom() > h)
+ h = floatBottom();
+
+ yPos += overflowTop();
+
+ int os = maximalOutlineSize(pI.phase);
+ if( (yPos > pI.r.bottom() + os) || (_ty + h <= pI.r.y() - os))
+ return;
+ }
+
+ paintObject(pI, _tx, _ty);
+}
+
+void RenderBlock::paintObject(PaintInfo& pI, int _tx, int _ty, bool shouldPaintOutline)
+{
+#ifdef DEBUG_LAYOUT
+ //kdDebug( 6040 ) << renderName() << "(RenderBlock) " << this << " ::paintObject() w/h = (" << width() << "/" << height() << ")" << endl;
+#endif
+
+ // If we're a repositioned run-in, don't paint background/borders.
+ bool inlineFlow = isInlineFlow();
+
+ // 1. paint background, borders etc
+ if (!inlineFlow &&
+ (pI.phase == PaintActionElementBackground || pI.phase == PaintActionChildBackground ) &&
+ shouldPaintBackgroundOrBorder() && style()->visibility() == VISIBLE)
+ paintBoxDecorations(pI, _tx, _ty);
+
+ if ( pI.phase == PaintActionElementBackground )
+ return;
+ if ( pI.phase == PaintActionChildBackgrounds )
+ pI.phase = PaintActionChildBackground;
+
+ // 2. paint contents
+ int scrolledX = _tx;
+ int scrolledY = _ty;
+ if (hasOverflowClip() && m_layer)
+ m_layer->subtractScrollOffset(scrolledX, scrolledY);
+
+ if (childrenInline())
+ paintLines(pI, scrolledX, scrolledY);
+ else {
+ for(RenderObject *child = firstChild(); child; child = child->nextSibling())
+ if(!child->layer() && !child->isFloating())
+ child->paint(pI, scrolledX, scrolledY);
+ }
+
+ // 3. paint floats.
+ if (!inlineFlow && (pI.phase == PaintActionFloat || pI.phase == PaintActionSelection))
+ paintFloats(pI, scrolledX, scrolledY, pI.phase == PaintActionSelection);
+
+ // 4. paint outline.
+ if (shouldPaintOutline && !inlineFlow && pI.phase == PaintActionOutline &&
+ style()->outlineWidth() && style()->visibility() == VISIBLE)
+ paintOutline(pI.p, _tx, _ty, width(), height(), style());
+
+#ifdef BOX_DEBUG
+ if ( style() && style()->visibility() == VISIBLE ) {
+ if(isAnonymous())
+ outlineBox(pI.p, _tx, _ty, "green");
+ if(isFloating())
+ outlineBox(pI.p, _tx, _ty, "yellow");
+ else
+ outlineBox(pI.p, _tx, _ty);
+ }
+#endif
+}
+
+void RenderBlock::paintFloats(PaintInfo& pI, int _tx, int _ty, bool paintSelection)
+{
+ if (!m_floatingObjects)
+ return;
+
+ FloatingObject* r;
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ for ( ; (r = it.current()); ++it) {
+ // Only paint the object if our noPaint flag isn't set.
+ if (r->node->isFloating() && !r->noPaint && !r->node->layer()) {
+ PaintAction oldphase = pI.phase;
+ if (paintSelection) {
+ pI.phase = PaintActionSelection;
+ r->node->paint(pI, _tx + r->left - r->node->xPos() + r->node->marginLeft(),
+ _ty + r->startY - r->node->yPos() + r->node->marginTop());
+ }
+ else {
+ pI.phase = PaintActionElementBackground;
+ r->node->paint(pI,
+ _tx + r->left - r->node->xPos() + r->node->marginLeft(),
+ _ty + r->startY - r->node->yPos() + r->node->marginTop());
+ pI.phase = PaintActionChildBackgrounds;
+ r->node->paint(pI,
+ _tx + r->left - r->node->xPos() + r->node->marginLeft(),
+ _ty + r->startY - r->node->yPos() + r->node->marginTop());
+ pI.phase = PaintActionFloat;
+ r->node->paint(pI,
+ _tx + r->left - r->node->xPos() + r->node->marginLeft(),
+ _ty + r->startY - r->node->yPos() + r->node->marginTop());
+ pI.phase = PaintActionForeground;
+ r->node->paint(pI,
+ _tx + r->left - r->node->xPos() + r->node->marginLeft(),
+ _ty + r->startY - r->node->yPos() + r->node->marginTop());
+ pI.phase = PaintActionOutline;
+ r->node->paint(pI,
+ _tx + r->left - r->node->xPos() + r->node->marginLeft(),
+ _ty + r->startY - r->node->yPos() + r->node->marginTop());
+ }
+ pI.phase = oldphase;
+ }
+ }
+}
+
+void RenderBlock::insertPositionedObject(RenderObject *o)
+{
+ // Create the list of special objects if we don't aleady have one
+ if (!m_positionedObjects) {
+ m_positionedObjects = new TQPtrList<RenderObject>;
+ m_positionedObjects->setAutoDelete(false);
+ }
+ else {
+ // Don't insert the object again if it's already in the list
+ TQPtrListIterator<RenderObject> it(*m_positionedObjects);
+ RenderObject* f;
+ while ( (f = it.current()) ) {
+ if (f == o) return;
+ ++it;
+ }
+ }
+
+ // Create the special object entry & append it to the list
+ setOverhangingContents();
+ m_positionedObjects->append(o);
+}
+
+void RenderBlock::removePositionedObject(RenderObject *o)
+{
+ if (m_positionedObjects) {
+ TQPtrListIterator<RenderObject> it(*m_positionedObjects);
+ while (it.current()) {
+ if (it.current() == o)
+ m_positionedObjects->removeRef(it.current());
+ ++it;
+ }
+ if (m_positionedObjects->isEmpty()) {
+ delete m_positionedObjects;
+ m_positionedObjects = 0;
+ }
+ }
+}
+
+void RenderBlock::insertFloatingObject(RenderObject *o)
+{
+ // Create the list of special objects if we don't aleady have one
+ if (!m_floatingObjects) {
+ m_floatingObjects = new TQPtrList<FloatingObject>;
+ m_floatingObjects->setAutoDelete(true);
+ }
+ else {
+ // Don't insert the object again if it's already in the list
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ FloatingObject* f;
+ while ( (f = it.current()) ) {
+ if (f->node == o) return;
+ ++it;
+ }
+ }
+
+ // Create the special object entry & append it to the list
+
+ FloatingObject *newObj;
+ if (o->isFloating()) {
+ // floating object
+ o->layoutIfNeeded();
+
+ if(o->style()->floating() & FLEFT)
+ newObj = new FloatingObject(FloatingObject::FloatLeft);
+ else
+ newObj = new FloatingObject(FloatingObject::FloatRight);
+
+ newObj->startY = -500000;
+ newObj->endY = -500000;
+ newObj->width = o->width() + o->marginLeft() + o->marginRight();
+ }
+ else {
+ // We should never get here, as insertFloatingObject() should only ever be called with floating
+ // objects.
+ KHTMLAssert(false);
+ newObj = 0; // keep gcc's uninitialized variable warnings happy
+ }
+
+ newObj->node = o;
+
+ m_floatingObjects->append(newObj);
+}
+
+void RenderBlock::removeFloatingObject(RenderObject *o)
+{
+ if (m_floatingObjects) {
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ while (it.current()) {
+ if (it.current()->node == o)
+ m_floatingObjects->removeRef(it.current());
+ ++it;
+ }
+ }
+}
+
+void RenderBlock::positionNewFloats()
+{
+ if(!m_floatingObjects) return;
+ FloatingObject *f = m_floatingObjects->getLast();
+ if(!f || f->startY != -500000) return;
+ FloatingObject *lastFloat;
+ while(1)
+ {
+ lastFloat = m_floatingObjects->prev();
+ if (!lastFloat || lastFloat->startY != -500000) {
+ m_floatingObjects->next();
+ break;
+ }
+ f = lastFloat;
+ }
+
+ int y = m_height;
+
+
+ // the float can not start above the y position of the last positioned float.
+ if(lastFloat && lastFloat->startY > y)
+ y = lastFloat->startY;
+
+ while(f)
+ {
+ //skip elements copied from elsewhere and positioned elements
+ if (f->node->containingBlock()!=this)
+ {
+ f = m_floatingObjects->next();
+ continue;
+ }
+
+ RenderObject *o = f->node;
+ int _height = o->height() + o->marginTop() + o->marginBottom();
+
+ // floats avoid page-breaks
+ if(canvas()->pagedMode())
+ {
+ int top = y;
+ int bottom = y + o->height();
+ if (crossesPageBreak(top, bottom) && o->height() < canvas()->pageHeight() ) {
+ int newY = pageTopAfter(top);
+#ifdef PAGE_DEBUG
+ kdDebug(6040) << renderName() << " clearing float " << newY - y << "px" << endl;
+#endif
+ y = newY;
+ }
+ }
+
+ int ro = rightOffset(); // Constant part of right offset.
+ int lo = leftOffset(); // Constant part of left offset.
+ int fwidth = f->width; // The width we look for.
+ //kdDebug( 6040 ) << " Object width: " << fwidth << " available width: " << ro - lo << endl;
+
+ // in quirk mode, floated auto-width tables try to fit within remaining linewidth
+ bool ftQuirk = o->isTable() && style()->htmlHacks() && o->style()->width().isVariable();
+ if (ftQuirk)
+ fwidth = kMin( o->minWidth()+o->marginLeft()+o->marginRight(), fwidth );
+
+ if (ro - lo < fwidth)
+ fwidth = ro - lo; // Never look for more than what will be available.
+
+ if ( o->style()->clear() & CLEFT )
+ y = kMax( leftBottom(), y );
+ if ( o->style()->clear() & CRIGHT )
+ y = kMax( rightBottom(), y );
+
+ bool canClearLine;
+ if (o->style()->floating() & FLEFT)
+ {
+ int heightRemainingLeft = 1;
+ int heightRemainingRight = 1;
+ int fx = leftRelOffset(y,lo, false, &heightRemainingLeft, &canClearLine);
+ if (canClearLine)
+ {
+ while (rightRelOffset(y,ro, false, &heightRemainingRight)-fx < fwidth)
+ {
+ y += kMin( heightRemainingLeft, heightRemainingRight );
+ fx = leftRelOffset(y,lo, false, &heightRemainingLeft);
+ }
+ }
+ if (ftQuirk && (rightRelOffset(y,ro, false)-fx < f->width)) {
+ o->setPos( o->xPos(), y + o->marginTop() );
+ o->setChildNeedsLayout(true, false);
+ o->layoutIfNeeded();
+ _height = o->height() + o->marginTop() + o->marginBottom();
+ f->width = o->width() + o->marginLeft() + o->marginRight();
+ }
+ f->left = fx;
+ //kdDebug( 6040 ) << "positioning left aligned float at (" << fx + o->marginLeft() << "/" << y + o->marginTop() << ") fx=" << fx << endl;
+ o->setPos(fx + o->marginLeft(), y + o->marginTop());
+ }
+ else
+ {
+ int heightRemainingLeft = 1;
+ int heightRemainingRight = 1;
+ int fx = rightRelOffset(y,ro, false, &heightRemainingRight, &canClearLine);
+ if (canClearLine)
+ {
+ while (fx - leftRelOffset(y,lo, false, &heightRemainingLeft) < fwidth)
+ {
+ y += kMin(heightRemainingLeft, heightRemainingRight);
+ fx = rightRelOffset(y,ro, false, &heightRemainingRight);
+ }
+ }
+ if (ftQuirk && (fx - leftRelOffset(y,lo, false) < f->width)) {
+ o->setPos( o->xPos(), y + o->marginTop() );
+ o->setChildNeedsLayout(true, false);
+ o->layoutIfNeeded();
+ _height = o->height() + o->marginTop() + o->marginBottom();
+ f->width = o->width() + o->marginLeft() + o->marginRight();
+ }
+ f->left = fx - f->width;
+ //kdDebug( 6040 ) << "positioning right aligned float at (" << fx - o->marginRight() - o->width() << "/" << y + o->marginTop() << ")" << endl;
+ o->setPos(fx - o->marginRight() - o->width(), y + o->marginTop());
+ }
+
+ if ( m_layer && hasOverflowClip()) {
+ if (o->xPos()+o->width() > m_overflowWidth)
+ m_overflowWidth = o->xPos()+o->width();
+ else
+ if (o->xPos() < m_overflowLeft)
+ m_overflowLeft = o->xPos();
+ }
+
+ f->startY = y;
+ f->endY = f->startY + _height;
+
+
+ //kdDebug( 6040 ) << "floatingObject x/y= (" << f->left << "/" << f->startY << "-" << f->width << "/" << f->endY - f->startY << ")" << endl;
+
+ f = m_floatingObjects->next();
+ }
+}
+
+void RenderBlock::newLine()
+{
+ positionNewFloats();
+ // set y position
+ int newY = 0;
+ switch(m_clearStatus)
+ {
+ case CLEFT:
+ newY = leftBottom();
+ break;
+ case CRIGHT:
+ newY = rightBottom();
+ break;
+ case CBOTH:
+ newY = floatBottom();
+ default:
+ break;
+ }
+ if(m_height < newY)
+ {
+ // kdDebug( 6040 ) << "adjusting y position" << endl;
+ m_height = newY;
+ }
+ m_clearStatus = CNONE;
+}
+
+int
+RenderBlock::leftOffset() const
+{
+ return borderLeft()+paddingLeft();
+}
+
+int
+RenderBlock::leftRelOffset(int y, int fixedOffset, bool applyTextIndent, int *heightRemaining, bool *canClearLine ) const
+{
+ int left = fixedOffset;
+ if (canClearLine) *canClearLine = true;
+
+ if (m_floatingObjects) {
+ if ( heightRemaining ) *heightRemaining = 1;
+ FloatingObject* r;
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ for ( ; (r = it.current()); ++it )
+ {
+ //kdDebug( 6040 ) <<(void *)this << " left: sy, ey, x, w " << r->startY << "," << r->endY << "," << r->left << "," << r->width << " " << endl;
+ if (r->startY <= y && r->endY > y &&
+ r->type == FloatingObject::FloatLeft &&
+ r->left + r->width > left) {
+ left = r->left + r->width;
+ if ( heightRemaining ) *heightRemaining = r->endY - y;
+ if ( canClearLine ) *canClearLine = (r->node->style()->floating() != FLEFT_ALIGN);
+ }
+ }
+ }
+
+ if (applyTextIndent && m_firstLine && style()->direction() == LTR ) {
+ int cw=0;
+ if (style()->textIndent().isPercent())
+ cw = containingBlock()->contentWidth();
+ left += style()->textIndent().minWidth(cw);
+ }
+
+ //kdDebug( 6040 ) << "leftOffset(" << y << ") = " << left << endl;
+ return left;
+}
+
+int
+RenderBlock::rightOffset() const
+{
+ int right = m_width - borderRight() - paddingRight();
+ if (m_layer && scrollsOverflowY())
+ right -= m_layer->verticalScrollbarWidth();
+ return right;
+}
+
+int
+RenderBlock::rightRelOffset(int y, int fixedOffset, bool applyTextIndent, int *heightRemaining, bool *canClearLine ) const
+{
+ int right = fixedOffset;
+ if (canClearLine) *canClearLine = true;
+
+ if (m_floatingObjects) {
+ if (heightRemaining) *heightRemaining = 1;
+ FloatingObject* r;
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ for ( ; (r = it.current()); ++it )
+ {
+ //kdDebug( 6040 ) << "right: sy, ey, x, w " << r->startY << "," << r->endY << "," << r->left << "," << r->width << " " << endl;
+ if (r->startY <= y && r->endY > y &&
+ r->type == FloatingObject::FloatRight &&
+ r->left < right) {
+ right = r->left;
+ if ( heightRemaining ) *heightRemaining = r->endY - y;
+ if ( canClearLine ) *canClearLine = (r->node->style()->floating() != FRIGHT_ALIGN);
+ }
+ }
+ }
+
+ if (applyTextIndent && m_firstLine && style()->direction() == RTL ) {
+ int cw=0;
+ if (style()->textIndent().isPercent())
+ cw = containingBlock()->contentWidth();
+ right -= style()->textIndent().minWidth(cw);
+ }
+
+ //kdDebug( 6040 ) << "rightOffset(" << y << ") = " << right << endl;
+ return right;
+}
+
+unsigned short
+RenderBlock::lineWidth(int y, bool *canClearLine) const
+{
+ //kdDebug( 6040 ) << "lineWidth(" << y << ")=" << rightOffset(y) - leftOffset(y) << endl;
+ int result;
+ if (canClearLine) {
+ bool rightCanClearLine;
+ bool leftCanClearLine;
+ result = rightOffset(y, &rightCanClearLine) - leftOffset(y, &leftCanClearLine);
+ *canClearLine = rightCanClearLine && leftCanClearLine;
+ } else
+ result = rightOffset(y) - leftOffset(y);
+ return (result < 0) ? 0 : result;
+}
+
+int
+RenderBlock::nearestFloatBottom(int height) const
+{
+ if (!m_floatingObjects) return 0;
+ int bottom = 0;
+ FloatingObject* r;
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ for ( ; (r = it.current()); ++it )
+ if (r->endY>height && (r->endY<bottom || bottom==0))
+ bottom=r->endY;
+ return kMax(bottom, height);
+}
+
+int RenderBlock::floatBottom() const
+{
+ if (!m_floatingObjects) return 0;
+ int bottom=0;
+ FloatingObject* r;
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ for ( ; (r = it.current()); ++it )
+ if (r->endY>bottom)
+ bottom=r->endY;
+ return bottom;
+}
+
+int RenderBlock::lowestPosition(bool includeOverflowInterior, bool includeSelf) const
+{
+ int bottom = RenderFlow::lowestPosition(includeOverflowInterior, includeSelf);
+ if (!includeOverflowInterior && hasOverflowClip())
+ return bottom;
+ if (includeSelf && m_overflowHeight > bottom)
+ bottom = m_overflowHeight;
+
+ if (m_floatingObjects) {
+ FloatingObject* r;
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ for ( ; (r = it.current()); ++it ) {
+ if (!r->noPaint) {
+ int lp = r->startY + r->node->marginTop() + r->node->lowestPosition(false);
+ bottom = kMax(bottom, lp);
+ }
+ }
+ }
+ bottom = kMax(bottom, lowestAbsolutePosition());
+
+ if (!includeSelf && lastLineBox()) {
+ int lp = lastLineBox()->yPos() + lastLineBox()->height();
+ bottom = kMax(bottom, lp);
+ }
+
+ return bottom;
+}
+
+int RenderBlock::lowestAbsolutePosition() const
+{
+ if (!m_positionedObjects)
+ return 0;
+
+ // Fixed positioned objects do not scroll and thus should not constitute
+ // part of the lowest position.
+ int bottom = 0;
+ RenderObject* r;
+ TQPtrListIterator<RenderObject> it(*m_positionedObjects);
+ for ( ; (r = it.current()); ++it ) {
+ if (r->style()->position() == FIXED)
+ continue;
+ int lp = r->yPos() + r->lowestPosition(false);
+ bottom = kMax(bottom, lp);
+ }
+ return bottom;
+}
+
+int RenderBlock::rightmostPosition(bool includeOverflowInterior, bool includeSelf) const
+{
+ int right = RenderFlow::rightmostPosition(includeOverflowInterior, includeSelf);
+ if (!includeOverflowInterior && hasOverflowClip())
+ return right;
+ if (includeSelf && m_overflowWidth > right)
+ right = m_overflowWidth;
+
+ if (m_floatingObjects) {
+ FloatingObject* r;
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ for ( ; (r = it.current()); ++it ) {
+ if (!r->noPaint) {
+ int rp = r->left + r->node->marginLeft() + r->node->rightmostPosition(false);
+ right = kMax(right, rp);
+ }
+ }
+ }
+ right = kMax(right, rightmostAbsolutePosition());
+
+ if (!includeSelf && firstLineBox()) {
+ for (InlineRunBox* currBox = firstLineBox(); currBox; currBox = currBox->nextLineBox()) {
+ int rp = currBox->xPos() + currBox->width();
+ right = kMax(right, rp);
+ }
+ }
+
+ return right;
+}
+
+int RenderBlock::rightmostAbsolutePosition() const
+{
+ if (!m_positionedObjects)
+ return 0;
+ int right = 0;
+ RenderObject* r;
+ TQPtrListIterator<RenderObject> it(*m_positionedObjects);
+ for ( ; (r = it.current()); ++it ) {
+ if (r->style()->position() == FIXED)
+ continue;
+ int rp = r->xPos() + r->rightmostPosition(false);
+ right = kMax(right, rp);
+ }
+ return right;
+}
+
+int RenderBlock::leftmostPosition(bool includeOverflowInterior, bool includeSelf) const
+{
+ int left = RenderFlow::leftmostPosition(includeOverflowInterior, includeSelf);
+ if (!includeOverflowInterior && hasOverflowClip())
+ return left;
+
+ if (includeSelf && m_overflowLeft < left)
+ left = m_overflowLeft;
+
+ if (m_floatingObjects) {
+ FloatingObject* r;
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ for ( ; (r = it.current()); ++it ) {
+ if (!r->noPaint) {
+ int lp = r->left + r->node->marginLeft() + r->node->leftmostPosition(false);
+ left = kMin(left, lp);
+ }
+ }
+ }
+ left = kMin(left, leftmostAbsolutePosition());
+
+ if (!includeSelf && firstLineBox()) {
+ for (InlineRunBox* currBox = firstLineBox(); currBox; currBox = currBox->nextLineBox())
+ left = kMin(left, (int)currBox->xPos());
+ }
+
+ return left;
+}
+
+int RenderBlock::leftmostAbsolutePosition() const
+{
+ if (!m_positionedObjects)
+ return 0;
+ int left = 0;
+ RenderObject* r;
+ TQPtrListIterator<RenderObject> it(*m_positionedObjects);
+ for ( ; (r = it.current()); ++it ) {
+ if (r->style()->position() == FIXED)
+ continue;
+ int lp = r->xPos() + r->leftmostPosition(false);
+ left = kMin(left, lp);
+ }
+ return left;
+}
+
+int RenderBlock::highestPosition(bool includeOverflowInterior, bool includeSelf) const
+{
+ int top = RenderFlow::highestPosition(includeOverflowInterior, includeSelf);
+ if (!includeOverflowInterior && hasOverflowClip())
+ return top;
+
+ if (includeSelf && m_overflowTop < top)
+ top = m_overflowTop;
+
+ if (m_floatingObjects) {
+ FloatingObject* r;
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ for ( ; (r = it.current()); ++it ) {
+ if (!r->noPaint) {
+ int hp = r->startY + r->node->marginTop() + r->node->highestPosition(false);
+ top = kMin(top, hp);
+ }
+ }
+ }
+ top = kMin(top, highestAbsolutePosition());
+
+ if (!includeSelf && firstLineBox()) {
+ top = kMin(top, (int)firstLineBox()->yPos());
+ }
+
+ return top;
+}
+
+int RenderBlock::highestAbsolutePosition() const
+{
+ if (!m_positionedObjects)
+ return 0;
+ int top = 0;
+ RenderObject* r;
+ TQPtrListIterator<RenderObject> it(*m_positionedObjects);
+ for ( ; (r = it.current()); ++it ) {
+ if (r->style()->position() == FIXED)
+ continue;
+ int hp = r->yPos() + r->highestPosition(false);
+ hp = kMin(top, hp);
+ }
+ return top;
+}
+
+int
+RenderBlock::leftBottom()
+{
+ if (!m_floatingObjects) return 0;
+ int bottom=0;
+ FloatingObject* r;
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ for ( ; (r = it.current()); ++it )
+ if (r->endY>bottom && r->type == FloatingObject::FloatLeft)
+ bottom=r->endY;
+
+ return bottom;
+}
+
+int
+RenderBlock::rightBottom()
+{
+ if (!m_floatingObjects) return 0;
+ int bottom=0;
+ FloatingObject* r;
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ for ( ; (r = it.current()); ++it )
+ if (r->endY>bottom && r->type == FloatingObject::FloatRight)
+ bottom=r->endY;
+
+ return bottom;
+}
+
+void
+RenderBlock::clearFloats()
+{
+ if (m_floatingObjects)
+ m_floatingObjects->clear();
+
+ // we are done if the element defines a new block formatting context
+ if (flowAroundFloats() || isRoot() || isCanvas() || isFloatingOrPositioned() || isTableCell()) return;
+
+ RenderObject *prev = previousSibling();
+
+ // find the element to copy the floats from
+ // pass non-flows
+ // pass fAF's
+ bool parentHasFloats = false;
+ while (prev) {
+ if (!prev->isRenderBlock() || prev->isFloatingOrPositioned() || prev->flowAroundFloats()) {
+ if ( prev->isFloating() && parent()->isRenderBlock() ) {
+ parentHasFloats = true;
+ }
+ prev = prev->previousSibling();
+ } else
+ break;
+ }
+
+ int offset = m_y;
+ if (parentHasFloats)
+ {
+ addOverHangingFloats( static_cast<RenderBlock *>( parent() ),
+ parent()->borderLeft() + parent()->paddingLeft(), offset, false );
+ }
+
+ int xoffset = 0;
+ if (prev) {
+ if(prev->isTableCell()) return;
+ offset -= prev->yPos();
+ } else {
+ prev = parent();
+ if(!prev) return;
+ xoffset += prev->borderLeft() + prev->paddingLeft();
+ }
+ //kdDebug() << "RenderBlock::clearFloats found previous "<< (void *)this << " prev=" << (void *)prev<< endl;
+
+ // add overhanging special objects from the previous RenderBlock
+ if(!prev->isRenderBlock()) return;
+ RenderBlock * flow = static_cast<RenderBlock *>(prev);
+ if(!flow->m_floatingObjects) return;
+ if(flow->floatBottom() > offset)
+ addOverHangingFloats( flow, xoffset, offset, false );
+}
+
+void RenderBlock::addOverHangingFloats( RenderBlock *flow, int xoff, int offset, bool child )
+{
+#ifdef DEBUG_LAYOUT
+ kdDebug( 6040 ) << (void *)this << ": adding overhanging floats xoff=" << xoff << " offset=" << offset << " child=" << child << endl;
+#endif
+
+ // Prevent floats from being added to the canvas by the root element, e.g., <html>.
+ if ( !flow->m_floatingObjects || (child && flow->isRoot()) )
+ return;
+
+ // if I am clear of my floats, don't add them
+ // the CSS spec also mentions that child floats
+ // are not cleared.
+ if (!child && style()->clear() == CBOTH)
+ {
+ return;
+ }
+
+ TQPtrListIterator<FloatingObject> it(*flow->m_floatingObjects);
+ FloatingObject *r;
+ for ( ; (r = it.current()); ++it ) {
+
+ if (!child && r->type == FloatingObject::FloatLeft && style()->clear() == CLEFT )
+ continue;
+ if (!child && r->type == FloatingObject::FloatRight && style()->clear() == CRIGHT )
+ continue;
+
+ if ( ( !child && r->endY > offset ) ||
+ ( child && flow->yPos() + r->endY > height() ) ) {
+ if (child && !r->crossedLayer) {
+ if (flow->enclosingLayer() == enclosingLayer()) {
+ // Set noPaint to true only if we didn't cross layers.
+ r->noPaint = true;
+ } else {
+ r->crossedLayer = true;
+ }
+ }
+
+ FloatingObject* f = 0;
+ // don't insert it twice!
+ if (m_floatingObjects) {
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ while ( (f = it.current()) ) {
+ if (f->node == r->node) break;
+ ++it;
+ }
+ }
+ if ( !f ) {
+ FloatingObject *floatingObj = new FloatingObject(r->type);
+ floatingObj->startY = r->startY - offset;
+ floatingObj->endY = r->endY - offset;
+ floatingObj->left = r->left - xoff;
+ // Applying the child's margin makes no sense in the case where the child was passed in.
+ // since his own margin was added already through the subtraction of the |xoff| variable
+ // above. |xoff| will equal -flow->marginLeft() in this case, so it's already been taken
+ // into account. Only apply this code if |child| is false, since otherwise the left margin
+ // will get applied twice. -dwh
+ if (!child && flow != parent())
+ floatingObj->left += flow->marginLeft();
+ if ( !child ) {
+ floatingObj->left -= marginLeft();
+ floatingObj->noPaint = true;
+ }
+ else {
+ floatingObj->noPaint = (r->crossedLayer || !r->noPaint);
+ floatingObj->crossedLayer = r->crossedLayer;
+ }
+
+ floatingObj->width = r->width;
+ floatingObj->node = r->node;
+ if (!m_floatingObjects) {
+ m_floatingObjects = new TQPtrList<FloatingObject>;
+ m_floatingObjects->setAutoDelete(true);
+ }
+ m_floatingObjects->append(floatingObj);
+#ifdef DEBUG_LAYOUT
+ kdDebug( 6040 ) << "addOverHangingFloats x/y= (" << floatingObj->left << "/" << floatingObj->startY << "-" << floatingObj->width << "/" << floatingObj->endY - floatingObj->startY << ")" << endl;
+#endif
+ }
+ }
+ }
+}
+
+bool RenderBlock::containsFloat(RenderObject* o) const
+{
+ if (m_floatingObjects) {
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ while (it.current()) {
+ if (it.current()->node == o)
+ return true;
+ ++it;
+ }
+ }
+ return false;
+}
+
+void RenderBlock::markAllDescendantsWithFloatsForLayout(RenderObject* floatToRemove)
+{
+ dirtyFormattingContext(false);
+ setChildNeedsLayout(true);
+
+ if (floatToRemove)
+ removeFloatingObject(floatToRemove);
+
+ // Iterate over our children and mark them as needed.
+ if (!childrenInline()) {
+ for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
+ if (isBlockFlow() && !child->isFloatingOrPositioned() &&
+ ((floatToRemove ? child->containsFloat(floatToRemove) : child->hasFloats()) || child->usesLineWidth()))
+ child->markAllDescendantsWithFloatsForLayout(floatToRemove);
+ }
+ }
+}
+
+int RenderBlock::getClearDelta(RenderObject *child)
+{
+ if (!hasFloats())
+ return 0;
+
+ //kdDebug( 6040 ) << "getClearDelta on child " << child << " oldheight=" << m_height << endl;
+ bool clearSet = child->style()->clear() != CNONE;
+ int bottom = 0;
+ switch(child->style()->clear())
+ {
+ case CNONE:
+ break;
+ case CLEFT:
+ bottom = leftBottom();
+ break;
+ case CRIGHT:
+ bottom = rightBottom();
+ break;
+ case CBOTH:
+ bottom = floatBottom();
+ break;
+ }
+
+ // We also clear floats if we are too big to sit on the same line as a float, and happen to flow around floats.
+ // FIXME: Note that the remaining space checks aren't quite accurate, since you should be able to clear only some floats (the minimum # needed
+ // to fit) and not all (we should be using nearestFloatBottom and looping).
+
+ int result = clearSet ? kMax(0, bottom - child->yPos()) : 0;
+ if (!result && child->flowAroundFloats() && !style()->width().isVariable()) {
+ bool canClearLine;
+ int lw = lineWidth(child->yPos(), &canClearLine);
+ if (((child->style()->width().isPercent() && child->width() > lw) ||
+ (child->style()->width().isFixed() && child->minWidth() > lw)) &&
+ child->minWidth() <= contentWidth() && canClearLine)
+ result = kMax(0, floatBottom() - child->yPos());
+ }
+ return result;
+}
+
+bool RenderBlock::isPointInScrollbar(int _x, int _y, int _tx, int _ty)
+{
+ if (!scrollsOverflow() || !m_layer)
+ return false;
+
+ if (m_layer->verticalScrollbarWidth()) {
+ TQRect vertRect(_tx + width() - borderRight() - m_layer->verticalScrollbarWidth(),
+ _ty + borderTop() - borderTopExtra(),
+ m_layer->verticalScrollbarWidth(),
+ height() + borderTopExtra() + borderBottomExtra()-borderTop()-borderBottom());
+ if (vertRect.contains(_x, _y)) {
+#ifdef APPLE_CHANGES
+ RenderLayer::gScrollBar = m_layer->verticalScrollbar();
+#endif
+ return true;
+ }
+ }
+
+ if (m_layer->horizontalScrollbarHeight()) {
+ TQRect horizRect(_tx + borderLeft(),
+ _ty + height() + borderTop() + borderBottomExtra() - borderBottom() - m_layer->horizontalScrollbarHeight(),
+ width()-borderLeft()-borderRight(),
+ m_layer->horizontalScrollbarHeight());
+ if (horizRect.contains(_x, _y)) {
+#ifdef APPLE_CHANGES
+ RenderLayer::gScrollBar = m_layer->horizontalScrollbar();
+#endif
+ return true;
+ }
+ }
+
+ return false;
+}
+
+bool RenderBlock::nodeAtPoint(NodeInfo& info, int _x, int _y, int _tx, int _ty, HitTestAction hitTestAction, bool inBox)
+{
+ bool inScrollbar = isPointInScrollbar(_x, _y, _tx+xPos(), _ty+yPos());
+ if (inScrollbar && hitTestAction != HitTestChildrenOnly)
+ inBox = true;
+
+ if (hitTestAction != HitTestSelfOnly && m_floatingObjects && !inScrollbar) {
+ int stx = _tx + xPos();
+ int sty = _ty + yPos();
+ if (hasOverflowClip() && m_layer)
+ m_layer->subtractScrollOffset(stx, sty);
+ FloatingObject* o;
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ for (it.toLast(); (o = it.current()); --it)
+ if (!o->noPaint && !o->node->layer())
+ inBox |= o->node->nodeAtPoint(info, _x, _y,
+ stx+o->left + o->node->marginLeft() - o->node->xPos(),
+ sty+o->startY + o->node->marginTop() - o->node->yPos(), HitTestAll ) ;
+ }
+
+ inBox |= RenderFlow::nodeAtPoint(info, _x, _y, _tx, _ty, hitTestAction, inBox);
+ return inBox;
+}
+
+void RenderBlock::calcMinMaxWidth()
+{
+ KHTMLAssert( !minMaxKnown() );
+
+#ifdef DEBUG_LAYOUT
+ kdDebug( 6040 ) << renderName() << "(RenderBlock)::calcMinMaxWidth() this=" << this << endl;
+#endif
+
+ m_minWidth = 0;
+ m_maxWidth = 0;
+
+ bool noWrap = !style()->autoWrap();
+ if (childrenInline())
+ calcInlineMinMaxWidth();
+ else
+ calcBlockMinMaxWidth();
+
+ if(m_maxWidth < m_minWidth) m_maxWidth = m_minWidth;
+
+ if (noWrap && childrenInline()) {
+ m_minWidth = m_maxWidth;
+
+ // A horizontal marquee with inline children has no minimum width.
+ if (style()->overflowX() == OMARQUEE && m_layer && m_layer->marquee() &&
+ m_layer->marquee()->isHorizontal() && !m_layer->marquee()->isUnfurlMarquee())
+ m_minWidth = 0;
+ }
+
+ if (isTableCell()) {
+ Length w = static_cast<RenderTableCell*>(this)->styleOrColWidth();
+ if (w.isFixed() && w.value() > 0)
+ m_maxWidth = kMax((int)m_minWidth, calcContentWidth(w.value()));
+ } else if (style()->width().isFixed() && style()->width().value() > 0)
+ m_minWidth = m_maxWidth = calcContentWidth(style()->width().value());
+
+ if (style()->minWidth().isFixed() && style()->minWidth().value() > 0) {
+ m_maxWidth = kMax(m_maxWidth, (int)calcContentWidth(style()->minWidth().value()));
+ m_minWidth = kMax(m_minWidth, (short)calcContentWidth(style()->minWidth().value()));
+ }
+
+ if (style()->maxWidth().isFixed() && style()->maxWidth().value() != UNDEFINED) {
+ m_maxWidth = kMin(m_maxWidth, (int)calcContentWidth(style()->maxWidth().value()));
+ m_minWidth = kMin(m_minWidth, (short)calcContentWidth(style()->maxWidth().value()));
+ }
+
+ int toAdd = 0;
+ toAdd = borderLeft() + borderRight() + paddingLeft() + paddingRight();
+
+ m_minWidth += toAdd;
+ m_maxWidth += toAdd;
+
+ setMinMaxKnown();
+
+ //kdDebug( 6040 ) << "Text::calcMinMaxWidth(" << this << "): min = " << m_minWidth << " max = " << m_maxWidth << endl;
+ // ### compare with min/max width set in style sheet...
+}
+
+// bidi.cpp defines the following functions too.
+// Maybe these should not be static, after all...
+
+#ifndef KDE_USE_FINAL
+
+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;
+}
+#endif
+
+static void stripTrailingSpace(bool preserveWS,
+ int& inlineMax, int& inlineMin,
+ RenderObject* trailingSpaceChild)
+{
+ if (!preserveWS && trailingSpaceChild && trailingSpaceChild->isText()) {
+ // Collapse away the trailing space at the end of a block.
+ RenderText* t = static_cast<RenderText *>(trailingSpaceChild);
+ const Font *f = t->htmlFont( false );
+ TQChar space[1]; space[0] = ' ';
+ int spaceWidth = f->width(space, 1, 0);
+ inlineMax -= spaceWidth;
+ if (inlineMin > inlineMax)
+ inlineMin = inlineMax;
+ }
+}
+
+void RenderBlock::calcInlineMinMaxWidth()
+{
+ int inlineMax=0;
+ int inlineMin=0;
+
+ int cw = containingBlock()->contentWidth();
+ int floatMaxWidth = 0;
+
+ // If we are at the start of a line, we want to ignore all white-space.
+ // Also strip spaces if we previously had text that ended in a trailing space.
+ bool stripFrontSpaces = true;
+
+ bool isTcQuirk = isTableCell() && style()->htmlHacks() && style()->width().isVariable();
+
+ RenderObject* trailingSpaceChild = 0;
+
+ bool autoWrap, oldAutoWrap;
+ autoWrap = oldAutoWrap = style()->autoWrap();
+
+ InlineMinMaxIterator childIterator(this, this);
+ bool addedTextIndent = false; // Only gets added in once.
+ RenderObject* prevFloat = 0;
+ while (RenderObject* child = childIterator.next())
+ {
+ autoWrap = child->style()->autoWrap();
+
+ if( !child->isBR() )
+ {
+ // Step One: determine whether or not we need to go ahead and
+ // terminate our current line. Each discrete chunk can become
+ // the new min-width, if it is the widest chunk seen so far, and
+ // it can also become the max-width.
+
+ // Children fall into three categories:
+ // (1) An inline flow object. These objects always have a min/max of 0,
+ // and are included in the iteration solely so that their margins can
+ // be added in.
+ //
+ // (2) An inline non-text non-flow object, e.g., an inline replaced element.
+ // These objects can always be on a line by themselves, so in this situation
+ // we need to go ahead and break the current line, and then add in our own
+ // margins and min/max width on its own line, and then terminate the line.
+ //
+ // (3) A text object. Text runs can have breakable characters at the start,
+ // the middle or the end. They may also lose whitespace off the front if
+ // we're already ignoring whitespace. In order to compute accurate min-width
+ // information, we need three pieces of information.
+ // (a) the min-width of the first non-breakable run. Should be 0 if the text string
+ // starts with whitespace.
+ // (b) the min-width of the last non-breakable run. Should be 0 if the text string
+ // ends with whitespace.
+ // (c) the min/max width of the string (trimmed for whitespace).
+ //
+ // If the text string starts with whitespace, then we need to go ahead and
+ // terminate our current line (unless we're already in a whitespace stripping
+ // mode.
+ //
+ // If the text string has a breakable character in the middle, but didn't start
+ // with whitespace, then we add the width of the first non-breakable run and
+ // then end the current line. We then need to use the intermediate min/max width
+ // values (if any of them are larger than our current min/max). We then look at
+ // the width of the last non-breakable run and use that to start a new line
+ // (unless we end in whitespace).
+ RenderStyle* cstyle = child->style();
+ short childMin = 0;
+ short childMax = 0;
+
+ if (!child->isText()) {
+ // Case (1) and (2). Inline replaced and inline flow elements.
+ if (child->isInlineFlow()) {
+ // Add in padding/border/margin from the appropriate side of
+ // the element.
+ int bpm = getBorderPaddingMargin(child, childIterator.endOfInline);
+ childMin += bpm;
+ childMax += bpm;
+
+ inlineMin += childMin;
+ inlineMax += childMax;
+ }
+ else {
+ // Inline replaced elements add in their margins to their min/max values.
+ int margins = 0;
+ LengthType type = cstyle->marginLeft().type();
+ if ( type != Variable )
+ margins += (type == Fixed ? cstyle->marginLeft().value() : child->marginLeft());
+ type = cstyle->marginRight().type();
+ if ( type != Variable )
+ margins += (type == Fixed ? cstyle->marginRight().value() : child->marginRight());
+ childMin += margins;
+ childMax += margins;
+ }
+ }
+
+ if (!child->isRenderInline() && !child->isText()) {
+
+ bool qBreak = isTcQuirk && !child->isFloatingOrPositioned();
+ // Case (2). Inline replaced elements and floats.
+ // Go ahead and terminate the current line as far as
+ // minwidth is concerned.
+ childMin += child->minWidth();
+ childMax += child->maxWidth();
+
+ if (!qBreak && (autoWrap || oldAutoWrap)) {
+ if(m_minWidth < inlineMin) m_minWidth = inlineMin;
+ inlineMin = 0;
+ }
+
+ // Check our "clear" setting. If we're supposed to clear the previous float, then
+ // go ahead and terminate maxwidth as well.
+ if (child->isFloating()) {
+ if (prevFloat &&
+ ((inlineMax + childMax > floatMaxWidth) ||
+ ((prevFloat->style()->floating() & FLEFT) && (child->style()->clear() & CLEFT)) ||
+ ((prevFloat->style()->floating() & FRIGHT) && (child->style()->clear() & CRIGHT)))) {
+ m_maxWidth = kMax(inlineMax, (int)m_maxWidth);
+ inlineMax = 0;
+ }
+ prevFloat = child;
+ if (!floatMaxWidth)
+ floatMaxWidth = availableWidth();
+ }
+
+ // Add in text-indent. This is added in only once.
+ int ti = 0;
+ if ( !addedTextIndent ) {
+ addedTextIndent = true;
+ ti = style()->textIndent().minWidth( cw );
+ childMin+=ti;
+ childMax+=ti;
+ }
+
+ // Add our width to the max.
+ inlineMax += childMax;
+
+ if (!autoWrap||qBreak)
+ inlineMin += childMin;
+ else {
+ // Now check our line.
+ inlineMin = childMin;
+ if(m_minWidth < inlineMin) m_minWidth = inlineMin;
+
+ // Now start a new line.
+ inlineMin = 0;
+ }
+
+ // We are no longer stripping whitespace at the start of
+ // a line.
+ if (!child->isFloating()) {
+ stripFrontSpaces = false;
+ trailingSpaceChild = 0;
+ }
+ }
+ else if (child->isText())
+ {
+ // Case (3). Text.
+ RenderText* t = static_cast<RenderText *>(child);
+
+ // Determine if we have a breakable character. Pass in
+ // whether or not we should ignore any spaces at the front
+ // of the string. If those are going to be stripped out,
+ // then they shouldn't be considered in the breakable char
+ // check.
+ bool hasBreakableChar, hasBreak;
+ short beginMin, endMin;
+ bool beginWS, endWS;
+ short beginMax, endMax;
+ t->trimmedMinMaxWidth(beginMin, beginWS, endMin, endWS, hasBreakableChar,
+ hasBreak, beginMax, endMax,
+ childMin, childMax, stripFrontSpaces);
+
+ // This text object is insignificant and will not be rendered. Just
+ // continue.
+ if (!hasBreak && childMax == 0) continue;
+
+ if (stripFrontSpaces)
+ trailingSpaceChild = child;
+ else
+ trailingSpaceChild = 0;
+
+ // Add in text-indent. This is added in only once.
+ int ti = 0;
+ if (!addedTextIndent) {
+ addedTextIndent = true;
+ ti = style()->textIndent().minWidth(cw);
+ childMin+=ti; beginMin += ti;
+ childMax+=ti; beginMax += ti;
+ }
+
+ // If we have no breakable characters at all,
+ // then this is the easy case. We add ourselves to the current
+ // min and max and continue.
+ if (!hasBreakableChar) {
+ inlineMin += childMin;
+ }
+ else {
+ // We have a breakable character. Now we need to know if
+ // we start and end with whitespace.
+ if (beginWS) {
+ // Go ahead and end the current line.
+ if(m_minWidth < inlineMin) m_minWidth = inlineMin;
+ }
+ else {
+ inlineMin += beginMin;
+ if(m_minWidth < inlineMin) m_minWidth = inlineMin;
+ childMin -= ti;
+ }
+
+ inlineMin = childMin;
+
+ if (endWS) {
+ // We end in whitespace, which means we can go ahead
+ // and end our current line.
+ if(m_minWidth < inlineMin) m_minWidth = inlineMin;
+ inlineMin = 0;
+ }
+ else {
+ if(m_minWidth < inlineMin) m_minWidth = inlineMin;
+ inlineMin = endMin;
+ }
+ }
+
+ if (hasBreak) {
+ inlineMax += beginMax;
+ if (m_maxWidth < inlineMax) m_maxWidth = inlineMax;
+ if (m_maxWidth < childMax) m_maxWidth = childMax;
+ inlineMax = endMax;
+ }
+ else
+ inlineMax += childMax;
+ }
+ }
+ else
+ {
+ if(m_minWidth < inlineMin) m_minWidth = inlineMin;
+ if(m_maxWidth < inlineMax) m_maxWidth = inlineMax;
+ inlineMin = inlineMax = 0;
+ stripFrontSpaces = true;
+ trailingSpaceChild = 0;
+ }
+
+ oldAutoWrap = autoWrap;
+ }
+
+ stripTrailingSpace(style()->preserveWS(), inlineMax, inlineMin, trailingSpaceChild);
+
+ if(m_minWidth < inlineMin) m_minWidth = inlineMin;
+ if(m_maxWidth < inlineMax) m_maxWidth = inlineMax;
+ // kdDebug( 6040 ) << "m_minWidth=" << m_minWidth
+ // << " m_maxWidth=" << m_maxWidth << endl;
+}
+
+// Use a very large value (in effect infinite).
+#define BLOCK_MAX_WIDTH 15000
+
+void RenderBlock::calcBlockMinMaxWidth()
+{
+ bool nowrap = !style()->autoWrap();
+
+ RenderObject *child = firstChild();
+ RenderObject* prevFloat = 0;
+ int floatWidths = 0;
+ int floatMaxWidth = 0;
+
+ while(child != 0)
+ {
+ // positioned children don't affect the minmaxwidth
+ if (child->isPositioned()) {
+ child = child->nextSibling();
+ continue;
+ }
+
+ if (prevFloat && (!child->isFloating() ||
+ ((prevFloat->style()->floating() & FLEFT) && (child->style()->clear() & CLEFT)) ||
+ ((prevFloat->style()->floating() & FRIGHT) && (child->style()->clear() & CRIGHT)))) {
+ m_maxWidth = kMax(floatWidths, m_maxWidth);
+ floatWidths = 0;
+ }
+
+ Length ml = child->style()->marginLeft();
+ Length mr = child->style()->marginRight();
+
+ // Call calcWidth on the child to ensure that our margins are
+ // up to date. This method can be called before the child has actually
+ // calculated its margins (which are computed inside calcWidth).
+ if (ml.isPercent() || mr.isPercent())
+ calcWidth();
+
+ // A margin basically has three types: fixed, percentage, and auto (variable).
+ // Auto margins simply become 0 when computing min/max width.
+ // Fixed margins can be added in as is.
+ // Percentage margins are computed as a percentage of the width we calculated in
+ // the calcWidth call above. In this case we use the actual cached margin values on
+ // the RenderObject itself.
+ int margin = 0;
+ if (ml.isFixed())
+ margin += ml.value();
+ else if (ml.isPercent())
+ margin += child->marginLeft();
+
+ if (mr.isFixed())
+ margin += mr.value();
+ else if (mr.isPercent())
+ margin += child->marginRight();
+
+ if (margin < 0) margin = 0;
+
+ int w = child->minWidth() + margin;
+ if(m_minWidth < w) m_minWidth = w;
+ // IE ignores tables for calculation of nowrap. Makes some sense.
+ if ( nowrap && !child->isTable() && m_maxWidth < w )
+ m_maxWidth = w;
+
+ w = child->maxWidth() + margin;
+
+ if(m_maxWidth < w) m_maxWidth = w;
+
+ if (child->isFloating()) {
+ if (prevFloat && (floatWidths + w > floatMaxWidth)) {
+ m_maxWidth = kMax(floatWidths, m_maxWidth);
+ floatWidths = w;
+ } else
+ floatWidths += w;
+ } else if (m_maxWidth < w)
+ m_maxWidth = w;
+
+ // A very specific WinIE quirk.
+ // Example:
+ /*
+ <div style="position:absolute; width:100px; top:50px;">
+ <div style="position:absolute;left:0px;top:50px;height:50px;background-color:green">
+ <table style="width:100%"><tr><td></table>
+ </div>
+ </div>
+ */
+ // In the above example, the inner absolute positioned block should have a computed width
+ // of 100px because of the table.
+ // We can achieve this effect by making the maxwidth of blocks that contain tables
+ // with percentage widths be infinite (as long as they are not inside a table cell).
+ if (style()->htmlHacks() && child->style()->width().isPercent() &&
+ !isTableCell() && child->isTable() && m_maxWidth < BLOCK_MAX_WIDTH) {
+ RenderBlock* cb = containingBlock();
+ while (!cb->isCanvas() && !cb->isTableCell())
+ cb = cb->containingBlock();
+ if (!cb->isTableCell())
+ m_maxWidth = BLOCK_MAX_WIDTH;
+ }
+ if (child->isFloating()) {
+ prevFloat = child;
+ if (!floatMaxWidth)
+ floatMaxWidth = availableWidth();
+ }
+ child = child->nextSibling();
+ }
+ m_maxWidth = kMax(floatWidths, m_maxWidth);
+}
+
+void RenderBlock::close()
+{
+ if (lastChild() && lastChild()->isAnonymousBlock())
+ lastChild()->close();
+ updateFirstLetter();
+ RenderFlow::close();
+}
+
+int RenderBlock::getBaselineOfFirstLineBox()
+{
+ if (m_firstLineBox)
+ return m_firstLineBox->yPos() + m_firstLineBox->baseline();
+
+ if (isInline())
+ return -1; // We're inline and had no line box, so we have no baseline we can return.
+
+ for (RenderObject* curr = firstChild(); curr; curr = curr->nextSibling()) {
+ int result = curr->getBaselineOfFirstLineBox();
+ if (result != -1)
+ return curr->yPos() + result; // Translate to our coordinate space.
+ }
+
+ return -1;
+}
+
+InlineFlowBox* RenderBlock::getFirstLineBox()
+{
+ if (m_firstLineBox)
+ return m_firstLineBox;
+
+ if (isInline())
+ return 0; // We're inline and had no line box, so we have no baseline we can return.
+
+ for (RenderObject* curr = firstChild(); curr; curr = curr->nextSibling()) {
+ InlineFlowBox* result = curr->getFirstLineBox();
+ if (result)
+ return result;
+ }
+
+ return 0;
+}
+
+bool RenderBlock::inRootBlockContext() const
+{
+ if (isTableCell() || isFloatingOrPositioned() || hasOverflowClip())
+ return false;
+
+ if (isRoot() || isCanvas())
+ return true;
+
+ return containingBlock()->inRootBlockContext();
+}
+
+const char *RenderBlock::renderName() const
+{
+ if (isFloating())
+ return "RenderBlock (floating)";
+ if (isPositioned())
+ return "RenderBlock (positioned)";
+ if (isAnonymousBlock() && m_avoidPageBreak)
+ return "RenderBlock (avoidPageBreak)";
+ if (isAnonymousBlock())
+ return "RenderBlock (anonymous)";
+ else if (isAnonymous())
+ return "RenderBlock (generated)";
+ if (isRelPositioned())
+ return "RenderBlock (relative positioned)";
+ if (style() && style()->display() == COMPACT)
+ return "RenderBlock (compact)";
+ if (style() && style()->display() == RUN_IN)
+ return "RenderBlock (run-in)";
+ return "RenderBlock";
+}
+
+#ifdef ENABLE_DUMP
+void RenderBlock::printTree(int indent) const
+{
+ RenderFlow::printTree(indent);
+
+ if (m_floatingObjects)
+ {
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ FloatingObject *r;
+ for ( ; (r = it.current()); ++it )
+ {
+ TQString s;
+ s.fill(' ', indent);
+ kdDebug() << s << renderName() << ": " <<
+ (r->type == FloatingObject::FloatLeft ? "FloatLeft" : "FloatRight" ) <<
+ "[" << r->node->renderName() << ": " << (void*)r->node << "] (" << r->startY << " - " << r->endY << ")" << "width: " << r->width <<
+ endl;
+ }
+ }
+}
+
+void RenderBlock::dump(TQTextStream &stream, const TQString &ind) const
+{
+ RenderFlow::dump(stream,ind);
+
+ if (m_childrenInline) { stream << " childrenInline"; }
+ // FIXME: currently only print pre to not mess up regression
+ if (style()->preserveWS()) { stream << " pre"; }
+ if (m_firstLine) { stream << " firstLine"; }
+
+ if (m_floatingObjects && !m_floatingObjects->isEmpty())
+ {
+ stream << " special(";
+ TQPtrListIterator<FloatingObject> it(*m_floatingObjects);
+ FloatingObject *r;
+ bool first = true;
+ for ( ; (r = it.current()); ++it )
+ {
+ if (!first)
+ stream << ",";
+ stream << r->node->renderName();
+ first = false;
+ }
+ stream << ")";
+ }
+
+ // ### EClear m_clearStatus
+}
+#endif
+
+#undef DEBUG
+#undef DEBUG_LAYOUT
+#undef BOX_DEBUG
+
+} // namespace tdehtml
+