Rename a number of libraries and executables to avoid conflicts with KDE4

1 files changed, 3155 insertions, 0 deletions

diff --git a/tdehtml/rendering/render_block.cpp b/tdehtml/rendering/render_block.cpp
new file mode 100644
index 000000000..3c6c79543
--- /dev/null
+++ b/tdehtml/rendering/render_block.cpp
@@ -0,0 +1,3155 @@
+/*
+ * 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
+