Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 865 insertions, 0 deletions

diff --git a/khtml/rendering/render_object.h b/khtml/rendering/render_object.h
new file mode 100644
index 000000000..6b98a5fa4
--- /dev/null
+++ b/khtml/rendering/render_object.h
@@ -0,0 +1,865 @@
+/*
+ * This file is part of the html renderer for KDE.
+ *
+ * Copyright (C) 2000-2003 Lars Knoll (knoll@kde.org)
+ *           (C) 2000 Antti Koivisto (koivisto@kde.org)
+ *           (C) 2000-2003 Dirk Mueller (mueller@kde.org)
+ *           (C) 2002-2003 Apple Computer, Inc.
+ *           (C) 2004 Allan Sandfeld Jensen
+ *
+ * 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.
+ *
+ */
+#ifndef render_object_h
+#define render_object_h
+
+#include <qcolor.h>
+#include <qrect.h>
+#include <assert.h>
+#include <qvaluelist.h>
+
+#include <kdebug.h>
+#include <kglobal.h>
+
+#include "xml/dom_docimpl.h"
+#include "misc/khtmllayout.h"
+#include "misc/loader_client.h"
+#include "misc/helper.h"
+#include "rendering/render_style.h"
+
+class QPainter;
+class QTextStream;
+class CSSStyle;
+class KHTMLView;
+
+#ifndef NDEBUG
+#define KHTMLAssert( x ) if( !(x) ) { \
+    const RenderObject *o = this; while( o->parent() ) o = o->parent(); \
+    o->printTree(); \
+    qDebug(" this object = %p, %s", (void*) this, kdBacktrace().latin1() ); \
+    assert( x ); \
+}
+#else
+#define KHTMLAssert( x )
+#endif
+
+/*
+ *	The painting of a layer occurs in three distinct phases.  Each phase involves
+ *	a recursive descent into the layer's render objects. The first phase is the background phase.
+ *	The backgrounds and borders of all blocks are painted.  Inlines are not painted at all.
+ *	Floats must paint above block backgrounds but entirely below inline content that can overlap them.
+ *	In the foreground phase, all inlines are fully painted.  Inline replaced elements will get all
+ *	three phases invoked on them during this phase.
+ */
+
+typedef enum {
+    PaintActionElementBackground = 0,
+    PaintActionChildBackground,
+    PaintActionChildBackgrounds,
+    PaintActionFloat,
+    PaintActionForeground,
+    PaintActionOutline,
+    PaintActionSelection,
+    PaintActionCollapsedTableBorders
+} PaintAction;
+
+typedef enum {
+    HitTestAll = 0,
+    HitTestSelfOnly = 1,
+    HitTestChildrenOnly = 2
+} HitTestAction;
+
+typedef enum {
+    PageBreakNormal = 0, // all rules apply
+    PageBreakHarder = 1, // page-break-inside: avoid is ignored
+    PageBreakForced = 2  // page-break-after/before: avoid, orphans and widows ignored
+} PageBreakLevel;
+
+typedef enum {
+    LowPriority = 0,
+    NormalPriority = 1,
+    HighPriority = 2,
+    RealtimePriority = 3
+} Priority;
+
+inline PageBreakLevel operator| (PageBreakLevel a, PageBreakLevel b) {
+    if (a == PageBreakForced || b == PageBreakForced)
+        return PageBreakForced;
+    if (a == PageBreakHarder || b == PageBreakHarder)
+        return PageBreakHarder;
+    return PageBreakNormal;
+}
+
+namespace DOM {
+    class HTMLAreaElementImpl;
+    class DOMString;
+    class NodeImpl;
+    class DocumentImpl;
+    class ElementImpl;
+    class EventImpl;
+}
+
+namespace khtml {
+    class RenderFlow;
+    class RenderStyle;
+    class RenderTable;
+    class CachedObject;
+    class RenderObject;
+    class RenderCanvas;
+    class RenderText;
+    class RenderFrameSet;
+    class RenderArena;
+    class RenderLayer;
+    class RenderBlock;
+    class InlineBox;
+    class InlineFlowBox;
+    class CounterNode;
+
+/**
+ * Base Class for all rendering tree objects.
+ */
+class RenderObject : public CachedObjectClient
+{
+    RenderObject(const RenderObject&);
+    RenderObject& operator=(const RenderObject&);
+public:
+
+    RenderObject(DOM::NodeImpl* node);
+    virtual ~RenderObject();
+
+    RenderObject *parent() const { return m_parent; }
+
+    RenderObject *previousSibling() const { return m_previous; }
+    RenderObject *nextSibling() const { return m_next; }
+
+    virtual RenderObject *firstChild() const { return 0; }
+    virtual RenderObject *lastChild() const { return 0; }
+
+    RenderObject *nextRenderer() const; 
+    RenderObject *previousRenderer() const; 
+
+    virtual bool childAllowed() const { return false; }
+    virtual int borderTopExtra() const { return 0; }
+    virtual int borderBottomExtra() const { return 0; }
+
+    virtual RenderLayer* layer() const { return 0; }
+    RenderLayer* enclosingLayer() const;
+    RenderLayer* enclosingStackingContext() const;
+    void addLayers(RenderLayer* parentLayer, RenderObject* newObject);
+    void removeLayers(RenderLayer* parentLayer);
+    void moveLayers(RenderLayer* oldParent, RenderLayer* newParent);
+    RenderLayer* findNextLayer(RenderLayer* parentLayer, RenderObject* startPoint,
+                               bool checkParent=true);
+    virtual void positionChildLayers() { }
+    virtual bool requiresLayer() const {
+        return isRoot()/* ### */ || isPositioned() || isRelPositioned() || hasOverflowClip();
+    }
+
+    // ### rename to overflowClipRect and clipRect
+    virtual QRect getOverflowClipRect(int /*tx*/, int /*ty*/)
+	{ return QRect(0,0,0,0); }
+    virtual QRect getClipRect(int /*tx*/, int /*ty*/) { return QRect(0,0,0,0); }
+    bool hasClip() const { return isPositioned() &&  style()->hasClip(); }
+    bool hasOverflowClip() const { return m_hasOverflowClip; }
+
+    bool scrollsOverflow() const { return scrollsOverflowX() || scrollsOverflowY(); }
+    bool scrollsOverflowX() const { return  hasOverflowClip() && (style()->overflowX() == OSCROLL || style()->overflowX() == OAUTO); }
+    bool scrollsOverflowY() const { return  hasOverflowClip() && (style()->overflowY() == OSCROLL || style()->overflowY() == OAUTO); }
+
+    virtual int getBaselineOfFirstLineBox() { return -1; } // Tables and blocks implement this.
+    virtual InlineFlowBox* getFirstLineBox() { return 0; } // Tables and blocks implement this.
+
+    // Whether or not a positioned element requires normal flow x/y to be computed
+    // to determine its position.
+    bool hasStaticX() const;
+    bool hasStaticY() const;
+
+    // Linear tree traversal
+    RenderObject *objectBelow() const;
+    RenderObject *objectAbove() const;
+
+    // Returns if an object has counter-increment or counter-reset
+    bool hasCounter(const QString& counter) const;
+    // Calculates the value of the counter
+    CounterNode* getCounter(const QString& counter, bool view = false, bool counters = false);
+    // Detaches all counterNodes
+    void detachCounters();
+
+
+protected:
+    // Helper functions for counter-cache
+    void insertCounter(const QString& counter, CounterNode* value);
+    CounterNode* lookupCounter(const QString& counter) const;
+
+public:
+    //////////////////////////////////////////
+    // RenderObject tree manipulation
+    virtual void addChild(RenderObject *newChild, RenderObject *beforeChild = 0);
+    void removeChild(RenderObject *oldChild);
+
+    // raw tree manipulation
+    virtual RenderObject* removeChildNode(RenderObject* child);
+    virtual void appendChildNode(RenderObject* child);
+    virtual void insertChildNode(RenderObject* child, RenderObject* before);
+    //////////////////////////////////////////
+
+    //////////////////////////////////////////
+    // Helper functions. Dangerous to use!
+    void setPreviousSibling(RenderObject *previous) { m_previous = previous; }
+    void setNextSibling(RenderObject *next) { m_next = next; }
+    void setParent(RenderObject *parent) { m_parent = parent; }
+    //////////////////////////////////////////
+
+public:
+    virtual const char *renderName() const { return "RenderObject"; }
+#ifdef ENABLE_DUMP
+    QString information() const;
+    virtual void printTree(int indent=0) const;
+    virtual void dump(QTextStream &stream, const QString &ind = QString::null) const;
+#endif
+
+    static RenderObject *createObject(DOM::NodeImpl* node, RenderStyle* style);
+
+    // Overloaded new operator.  Derived classes must override operator new
+    // in order to allocate out of the RenderArena.
+    void* operator new(size_t sz, RenderArena* renderArena) throw();
+
+    // Overridden to prevent the normal delete from being called.
+    void operator delete(void* ptr, size_t sz);
+
+private:
+    // The normal operator new is disallowed on all render objects.
+    void* operator new(size_t sz);
+
+public:
+    RenderArena* renderArena() const;
+    virtual RenderFlow* continuation() const { return 0; }
+    virtual bool isInlineContinuation() const { return false; }
+
+
+    bool isRoot() const { return m_isRoot && !m_isAnonymous; }
+    void setIsRoot(bool b) { m_isRoot = b; }
+    bool isHR() const;
+    // some helper functions...
+    virtual bool isRenderBlock() const { return false; }
+    virtual bool isRenderInline() const { return false; }
+    virtual bool isInlineFlow() const { return false; }
+    virtual bool isBlockFlow() const { return false; }
+    virtual bool isInlineBlockOrInlineTable() const { return false; }
+    virtual bool childrenInline() const { return false; }
+    virtual bool isBox() const { return false; }
+    virtual bool isRenderReplaced() const { return false; }
+
+    virtual bool isGlyph() const { return false; }
+    virtual bool isCounter() const { return false; }
+    virtual bool isQuote() const { return false; }
+    virtual bool isListItem() const { return false; }
+    virtual bool isListMarker() const { return false; }
+    virtual bool isCanvas() const { return false; }
+    virtual bool isBR() const { return false; }
+    virtual bool isTableCell() const { return false; }
+    virtual bool isTableRow() const { return false; }
+    virtual bool isTableSection() const { return false; }
+    virtual bool isTableCol() const { return false; }
+    virtual bool isTable() const { return false; }
+    virtual bool isWidget() const { return false; }
+    virtual bool isBody() const { return false; }
+    virtual bool isFormElement() const { return false; }
+    virtual bool isFrameSet() const { return false; }
+    virtual bool isApplet() const { return false; }
+
+    bool isHTMLMarquee() const;
+
+    bool isAnonymous() const { return m_isAnonymous; }
+    void setIsAnonymous(bool b) { m_isAnonymous = b; }
+    bool isAnonymousBlock() const { return isAnonymous() && style()->display() == BLOCK && node()->isDocumentNode(); }
+    bool isPseudoAnonymous() const { return isAnonymous() && !node()->isDocumentNode(); }
+
+    bool isFloating() const { return m_floating; }
+    bool isPositioned() const { return m_positioned; }
+    bool isRelPositioned() const { return m_relPositioned; }
+    bool isText() const { return m_isText; }
+    bool isInline() const { return m_inline; }
+    bool isCompact() const { return style()->display() == COMPACT; } // compact
+    bool isRunIn() const { return style()->display() == RUN_IN; } // run-in object
+    bool mouseInside() const;
+    bool isReplaced() const { return m_replaced; }
+    bool isReplacedBlock() const { return isInline() && isReplaced() && isRenderBlock(); }
+    bool shouldPaintBackgroundOrBorder() const { return m_paintBackground; }
+    bool needsLayout() const   { return m_needsLayout || m_normalChildNeedsLayout || m_posChildNeedsLayout; }
+    bool markedForRepaint() const { return m_markedForRepaint; }
+    void setMarkedForRepaint(bool m) { m_markedForRepaint = m; }
+    bool selfNeedsLayout() const { return m_needsLayout; }
+    bool posChildNeedsLayout() const { return m_posChildNeedsLayout; }
+    bool normalChildNeedsLayout() const { return m_normalChildNeedsLayout; }
+    bool minMaxKnown() const{ return m_minMaxKnown; }
+    bool overhangingContents() const { return m_overhangingContents; }
+    bool hasFirstLine() const { return m_hasFirstLine; }
+    bool isSelectionBorder() const { return m_isSelectionBorder; }
+    bool recalcMinMax() const { return m_recalcMinMax; }
+
+    RenderCanvas* canvas() const;
+    // don't even think about making this method virtual!
+    DOM::DocumentImpl* document() const;
+    DOM::NodeImpl* element() const { return isAnonymous() ? 0L : m_node; }
+    DOM::NodeImpl* node() const { return m_node; }
+
+   /**
+     * returns the object containing this one. can be different from parent for
+     * positioned elements
+     */
+    RenderObject *container() const;
+
+    void setOverhangingContents(bool p=true);
+    void markContainingBlocksForLayout();
+    void dirtyFormattingContext( bool checkContainer );
+    void repaintDuringLayout();
+    void setNeedsLayout(bool b, bool markParents = true);
+    void setChildNeedsLayout(bool b, bool markParents = true);
+    void setMinMaxKnown(bool b=true) {
+	m_minMaxKnown = b;
+	if ( !b ) {
+	    RenderObject *o = this;
+	    RenderObject *root = this;
+	    while( o ) { // ### && !o->m_recalcMinMax ) {
+		o->m_recalcMinMax = true;
+		root = o;
+		o = o->m_parent;
+	    }
+	}
+    }
+    void setNeedsLayoutAndMinMaxRecalc() {
+        setMinMaxKnown(false);
+        setNeedsLayout(true);
+    }
+    void setPositioned(bool b=true)  { m_positioned = b;  }
+    void setRelPositioned(bool b=true) { m_relPositioned = b; }
+    void setFloating(bool b=true) { m_floating = b; }
+    void setInline(bool b=true) { m_inline = b; }
+    void setMouseInside(bool b=true) { m_mouseInside = b; }
+    void setShouldPaintBackgroundOrBorder(bool b=true) { m_paintBackground = b; }
+    void setRenderText() { m_isText = true; }
+    void setReplaced(bool b=true) { m_replaced = b; }
+    void setHasOverflowClip(bool b = true) { m_hasOverflowClip = b; }
+    void setIsSelectionBorder(bool b=true) { m_isSelectionBorder = b; }
+
+    void scheduleRelayout(RenderObject *clippedObj = 0);
+
+    void updateBackgroundImages(RenderStyle* oldStyle);
+
+    virtual InlineBox* createInlineBox(bool makePlaceHolderBox, bool isRootLineBox);
+
+    virtual short lineHeight( bool firstLine ) const;
+    virtual short verticalPositionHint( bool firstLine ) const;
+    virtual short baselinePosition( bool firstLine ) const;
+    short getVerticalPosition( bool firstLine, RenderObject* ref=0 ) const;
+
+    /*
+     * Print the object and its children, clipped by (x|y|w|h).
+     * (tx|ty) is the calculated position of the parent
+     */
+    struct PaintInfo {
+       PaintInfo(QPainter* _p, const QRect& _r, PaintAction _phase)
+           : p(_p), r(_r), phase(_phase), outlineObjects(0) {}
+       ~PaintInfo() { delete outlineObjects; }
+       QPainter* p;
+       QRect     r;
+       PaintAction phase;
+       QValueList<RenderFlow *>* outlineObjects; // used to list which outlines should be painted by a block with inline children
+    };
+    virtual void paint( PaintInfo& i, int tx, int ty);
+
+    void paintBorder(QPainter *p, int _tx, int _ty, int w, int h, const RenderStyle* style, bool begin=true, bool end=true);
+    void paintOutline(QPainter *p, int _tx, int _ty, int w, int h, const RenderStyle* style);
+
+    virtual void paintBoxDecorations(PaintInfo&, int /*_tx*/, int /*_ty*/) {}
+
+    virtual void paintBackgroundExtended(QPainter* /*p*/, const QColor& /*c*/, const BackgroundLayer */*bgLayer*/,
+                                         int /*clipy*/, int /*cliph*/, int /*_tx*/, int /*_ty*/,
+                                         int /*w*/, int /*height*/, int /*bleft*/, int /*bright*/, int /*pleft*/, int /*pright*/  ) {}
+
+
+    /*
+     * This function calculates the minimum & maximum width that the object
+     * can be set to.
+     *
+     * when the Element calls setMinMaxKnown(true), calcMinMaxWidth() will
+     * be no longer called.
+     *
+     * when a element has a fixed size, m_minWidth and m_maxWidth should be
+     * set to the same value. This has the special meaning that m_width,
+     * contains the actual value.
+     *
+     * assumes calcMinMaxWidth has already been called for all children.
+     */
+    virtual void calcMinMaxWidth() { }
+
+    /*
+     * Does the min max width recalculations after changes.
+     */
+    void recalcMinMaxWidths();
+
+    /*
+     * Calculates the actual width of the object (only for non inline
+     * objects)
+     */
+    virtual void calcWidth() {}
+
+    /*
+     * Calculates the actual width of the object (only for non inline
+     * objects)
+     */
+    virtual void calcHeight() {}
+
+    /*
+     * This function should cause the Element to calculate its
+     * width and height and the layout of its content
+     *
+     * when the Element calls setNeedsLayout(false), layout() is no
+     * longer called during relayouts, as long as there is no
+     * style sheet change. When that occurs, m_needsLayout will be
+     * set to true and the Element receives layout() calls
+     * again.
+     */
+    virtual void layout() = 0;
+
+    /* This function performs a layout only if one is needed. */
+    void layoutIfNeeded() { if (needsLayout()) layout(); }
+
+    // used for element state updates that can not be fixed with a
+    // repaint and do not need a relayout
+    virtual void updateFromElement() {}
+
+    // Called immediately after render-object is inserted
+    virtual void attach() { m_attached = true; }
+    bool attached() { return m_attached; }
+    // The corresponding closing element has been parsed. ### remove me
+    virtual void close() { }
+
+    virtual int availableHeight() const { return 0; }
+
+    // Whether or not the element shrinks to its max width (rather than filling the width
+    // of a containing block).  HTML4 buttons, legends, and floating/compact elements do this.
+    bool sizesToMaxWidth() const;
+
+    /*
+     * NeesPageClear indicates the object crossed a page-break but could not break itself and now
+     * needs to be moved clear by its parent.
+     */
+    void setNeedsPageClear(bool b = true) { m_needsPageClear = b; }
+    virtual bool needsPageClear() const { return m_needsPageClear; }
+
+    /*
+     * ContainsPageBreak indicates the object contains a clean page-break.
+     * ### should be removed and replaced with (crossesPageBreak && !needsPageClear)
+     */
+    void setContainsPageBreak(bool b = true) { m_containsPageBreak = b; }
+    virtual bool containsPageBreak() const { return m_containsPageBreak; }
+
+    virtual int pageTopAfter(int y) const { if (parent()) return parent()->pageTopAfter(y); else return 0; }
+
+    virtual int crossesPageBreak(int top, int bottom) const
+    { if (parent()) return parent()->crossesPageBreak(top, bottom); else return 0; }
+
+    // Checks if a page-break before child is possible at the given page-break level
+    // false means the child should attempt the break self.
+    virtual bool canClear(RenderObject */*child*/, PageBreakLevel level)
+    { if (parent()) return parent()->canClear(this, level); else return false; }
+
+    void setAfterPageBreak(bool b = true)  { m_afterPageBreak = b; };
+    void setBeforePageBreak(bool b = true) { m_beforePageBreak = b; };
+    virtual bool afterPageBreak() const  { return m_afterPageBreak; }
+    virtual bool beforePageBreak() const { return m_beforePageBreak; }
+
+    // does a query on the rendertree and finds the innernode
+    // and overURL for the given position
+    // if readonly == false, it will recalc hover styles accordingly
+   class NodeInfo
+    {
+        friend class RenderImage;
+        friend class RenderFlow;
+        friend class RenderInline;
+        friend class RenderText;
+        friend class RenderWidget;
+        friend class RenderObject;
+        friend class RenderFrameSet;
+	friend class RenderLayer;
+        friend class DOM::HTMLAreaElementImpl;
+    public:
+        NodeInfo(bool readonly, bool active)
+            : m_innerNode(0), m_innerNonSharedNode(0), m_innerURLElement(0), m_readonly(readonly), m_active(active)
+            { }
+
+        DOM::NodeImpl* innerNode() const { return m_innerNode; }
+        DOM::NodeImpl* innerNonSharedNode() const { return m_innerNonSharedNode; }
+        DOM::NodeImpl* URLElement() const { return m_innerURLElement; }
+        bool readonly() const { return m_readonly; }
+        bool active() const { return m_active; }
+
+    private:
+        void setInnerNode(DOM::NodeImpl* n) { m_innerNode = n; }
+        void setInnerNonSharedNode(DOM::NodeImpl* n) { m_innerNonSharedNode = n; }
+        void setURLElement(DOM::NodeImpl* n) { m_innerURLElement = n; }
+
+        DOM::NodeImpl* m_innerNode;
+        DOM::NodeImpl* m_innerNonSharedNode;
+        DOM::NodeImpl* m_innerURLElement;
+        bool m_readonly;
+        bool m_active;
+    };
+
+    /** contains stateful information for a checkSelectionPoint call
+     */
+    struct SelPointState {
+        /** last node that was before the current position */
+        DOM::NodeImpl *m_lastNode;
+	/** offset of last node */
+	long m_lastOffset;
+	/** true when the last node had the result SelectionAfterInLine */
+	bool m_afterInLine;
+
+	SelPointState() : m_lastNode(0), m_lastOffset(0), m_afterInLine(false)
+	{}
+    };
+
+    virtual FindSelectionResult checkSelectionPoint( int _x, int _y, int _tx, int _ty,
+                                                     DOM::NodeImpl*&, int & offset,
+						     SelPointState & );
+    virtual bool nodeAtPoint(NodeInfo& info, int x, int y, int tx, int ty, HitTestAction, bool inside = false);
+    void setInnerNode(NodeInfo& info);
+
+    // set the style of the object.
+    virtual void setStyle(RenderStyle *style);
+
+    // returns the containing block level element for this element.
+    RenderBlock *containingBlock() const;
+
+    // return just the width of the containing block
+    virtual short containingBlockWidth() const;
+    // return just the height of the containing block
+    virtual int containingBlockHeight() const;
+
+    // size of the content area (box size minus padding/border)
+    virtual short contentWidth() const { return 0; }
+    virtual int contentHeight() const { return 0; }
+
+    // intrinsic extend of replaced elements. undefined otherwise
+    virtual short intrinsicWidth() const { return 0; }
+    virtual int intrinsicHeight() const { return 0; }
+
+    // relative to parent node
+    virtual void setPos( int /*xPos*/, int /*yPos*/ ) { }
+    virtual void setWidth( int /*width*/ ) { }
+    virtual void setHeight( int /*height*/ ) { }
+
+    virtual int xPos() const { return 0; }
+    virtual int yPos() const { return 0; }
+
+    /** the position of the object from where it begins drawing, including
+     * its negative overflow
+     */
+    int effectiveXPos() const { return xPos() + (hasOverflowClip() ? 0 : overflowLeft()); }
+
+    /** the position of the object from where it begins drawing, including
+     * its negative overflow
+     */
+    int effectiveYPos() const { return yPos() + (hasOverflowClip() ? -borderTopExtra() : kMin(overflowTop(), -borderTopExtra())); }
+
+    /** Leftmost coordinate of this inline element relative to containing
+     * block. Always zero for non-inline elements.
+     */
+    virtual int inlineXPos() const { return 0; }
+    /** Topmost coordinate of this inline element relative to containing
+     * block. Always zero for non-inline elements.
+     */
+    virtual int inlineYPos() const { return 0; }
+
+    // calculate client position of box
+    virtual bool absolutePosition(int &/*xPos*/, int &/*yPos*/, bool fixed = false) const;
+
+    // width and height are without margins but include paddings and borders
+    virtual short width() const { return 0; }
+    virtual int height() const { return 0; }
+
+    // The height of a block when you include overflow spillage out of
+    // the bottom of the block (e.g., a <div style="height:25px"> that
+    // has a 100px tall image inside it would have an overflow height
+    // of borderTop() + paddingTop() + 100px.
+    virtual int overflowHeight() const { return height(); }
+    virtual int overflowWidth() const { return width(); }
+    // how much goes over the left hand side (0 or a negative number)
+    virtual int overflowTop() const { return 0; }
+    virtual int overflowLeft() const { return 0; }
+    
+    /**
+     * Returns the height that is effectively considered when contemplating the
+     * object as a whole -- usually the overflow height, or the height if clipped.
+     */
+    int effectiveHeight() const { return hasOverflowClip() ? height() + borderTopExtra() + borderBottomExtra() : 
+                                         kMax(overflowHeight() - overflowTop(),  height() + borderTopExtra() + borderBottomExtra()); }
+    /**
+     * Returns the width that is effectively considered when contemplating the
+     * object as a whole -- usually the overflow width, or the width if clipped.
+     */
+    int effectiveWidth() const { return hasOverflowClip() ? width() : overflowWidth() - overflowLeft(); }
+
+    // IE extensions, heavily used in ECMA
+    virtual short offsetWidth() const { return width(); }
+    virtual int offsetHeight() const { return height() + borderTopExtra() + borderBottomExtra(); }
+    virtual int offsetLeft() const;
+    virtual int offsetTop() const;
+    virtual RenderObject* offsetParent() const;
+    short clientWidth() const;
+    int clientHeight() const;
+    short scrollWidth() const;
+    int scrollHeight() const;
+
+    virtual bool isSelfCollapsingBlock() const { return false; }
+    short collapsedMarginTop() const { return maxTopMargin(true)-maxTopMargin(false);  }
+    short collapsedMarginBottom() const { return maxBottomMargin(true)-maxBottomMargin(false); }
+
+    virtual bool isTopMarginQuirk() const { return false; }
+    virtual bool isBottomMarginQuirk() const { return false; }
+    virtual short maxTopMargin(bool positive) const
+    { return positive ? kMax( int( marginTop() ), 0 ) : - kMin( int( marginTop() ), 0 ); }
+    virtual short maxBottomMargin(bool positive) const
+    { return positive ? kMax( int( marginBottom() ), 0 ) : - kMin( int( marginBottom() ), 0 ); }
+
+    virtual short marginTop() const { return 0; }
+    virtual short marginBottom() const { return 0; }
+    virtual short marginLeft() const { return 0; }
+    virtual short marginRight() const { return 0; }
+
+    virtual int paddingTop() const;
+    virtual int paddingBottom() const;
+    virtual int paddingLeft() const;
+    virtual int paddingRight() const;
+
+    virtual int borderTop() const { return style()->borderTopWidth(); }
+    virtual int borderBottom() const { return style()->borderBottomWidth(); }
+    virtual int borderLeft() const { return style()->borderLeftWidth(); }
+    virtual int borderRight() const { return style()->borderRightWidth(); }
+
+    virtual short minWidth() const { return 0; }
+    virtual int maxWidth() const { return 0; }
+
+    RenderStyle* style() const { return m_style; }
+    RenderStyle* style( bool firstLine ) const {
+	RenderStyle *s = m_style;
+	if( firstLine && hasFirstLine() ) {
+	    RenderStyle *pseudoStyle  = style()->getPseudoStyle(RenderStyle::FIRST_LINE);
+	    if ( pseudoStyle )
+		s = pseudoStyle;
+	}
+	return s;
+    }
+
+    void getTextDecorationColors(int decorations, QColor& underline, QColor& overline,
+                                 QColor& linethrough, bool quirksMode=false);
+
+    enum BorderSide {
+        BSTop, BSBottom, BSLeft, BSRight
+    };
+    void drawBorder(QPainter *p, int x1, int y1, int x2, int y2, BorderSide s,
+                    QColor c, const QColor& textcolor, EBorderStyle style,
+                    int adjbw1, int adjbw2, bool invalidisInvert = false);
+
+    // Used by collapsed border tables.
+    virtual void collectBorders(QValueList<CollapsedBorderValue>& borderStyles);
+
+    // force a complete repaint
+    virtual void repaint(Priority p = NormalPriority) { if(m_parent) m_parent->repaint(p); }
+    virtual void repaintRectangle(int x, int y, int w, int h, Priority p=NormalPriority, bool f=false);
+
+    virtual unsigned int length() const { return 1; }
+
+    virtual bool isHidden() const { return isFloating() || isPositioned(); }
+
+    // Special objects are objects that are neither really inline nor blocklevel
+    bool isFloatingOrPositioned() const { return (isFloating() || isPositioned()); };
+    virtual bool hasOverhangingFloats() const { return false; }
+    virtual bool hasFloats() const { return false; }
+    virtual bool containsFloat(RenderObject* /*o*/) const { return false; }
+    virtual void markAllDescendantsWithFloatsForLayout(RenderObject* /*floatToRemove*/ = 0) {}
+
+    bool flowAroundFloats() const;
+    bool usesLineWidth() const;
+
+    // positioning of inline children (bidi)
+    virtual void position(InlineBox*, int, int, bool) {}
+//    virtual void position(int, int, int, int, int, bool, bool, int) {}
+
+    // Applied as a "slop" to dirty rect checks during the outline painting phase's dirty-rect checks.
+    int maximalOutlineSize(PaintAction p) const;
+
+    enum SelectionState {
+        SelectionNone,
+        SelectionStart,
+        SelectionInside,
+        SelectionEnd,
+        SelectionBoth
+    };
+
+    virtual SelectionState selectionState() const { return SelectionNone;}
+    virtual void setSelectionState(SelectionState) {}
+
+    /**
+     * Flags which influence the appearence and position
+     * @param CFOverride input overrides existing character, caret should be
+     *		cover the whole character
+     * @param CFOutside coordinates are to be interpreted outside of the
+     *		render object
+     * @param CFOutsideEnd coordinates are to be interpreted at the outside
+     *		end of the render object (only valid if CFOutside is also set)
+     */
+    enum CaretFlags { CFOverride = 0x01, CFOutside = 0x02, CFOutsideEnd = 0x04 };
+
+    /**
+     * Returns the content coordinates of the caret within this render object.
+     * @param offset zero-based offset determining position within the render object.
+     * @param flags combination of enum CaretFlags
+     * @param _x returns the left coordinate
+     * @param _y returns the top coordinate
+     * @param width returns the caret's width
+     * @param height returns the caret's height
+     */
+    virtual void caretPos(int offset, int flags, int &_x, int &_y, int &width, int &height);
+
+    // returns the lowest position of the lowest object in that particular object.
+    // This 'height' is relative to the topleft of the margin box of the object.
+    // Implemented in RenderFlow.
+    virtual int lowestPosition(bool /*includeOverflowInterior*/=true, bool /*includeSelf*/=true) const { return 0; }
+    virtual int rightmostPosition(bool /*includeOverflowInterior*/=true, bool /*includeSelf*/=true) const { return 0; }
+    virtual int leftmostPosition(bool /*includeOverflowInterior*/=true, bool /*includeSelf*/=true) const { return 0; }
+    virtual int highestPosition(bool /*includeOverflowInterior*/=true, bool /*includeSelf*/=true) const { return 0; }
+
+    // recursively invalidate current layout
+    // unused: void invalidateLayout();
+
+    virtual void calcVerticalMargins() {}
+    void removeFromObjectLists();
+
+    virtual void deleteInlineBoxes(RenderArena* arena=0) {(void)arena;}
+    virtual void detach( );
+
+    void setDoNotDelete(bool b) { m_doNotDelete = b; }
+    bool doNotDelete() const { return m_doNotDelete; }
+
+    const QFont &font(bool firstLine) const {
+	return style( firstLine )->font();
+    }
+
+    const QFontMetrics &fontMetrics(bool firstLine) const {
+	return style( firstLine )->fontMetrics();
+    }
+
+    /** returns the lowest possible value the caret offset may have to
+     * still point to a valid position.
+     *
+     * Returns 0 by default.
+     */
+    virtual long minOffset() const { return 0; }
+    /** returns the highest possible value the caret offset may have to
+     * still point to a valid position.
+     *
+     * Returns 0 by default, as generic elements are considered to have no
+     * width.
+     */
+    virtual long maxOffset() const { return 0; }
+
+    virtual void setPixmap(const QPixmap &, const QRect&, CachedImage *);
+
+    QRegion visibleFlowRegion(int x, int y) const;
+
+protected:
+    virtual void selectionStartEnd(int& spos, int& epos);
+
+    virtual QRect viewRect() const;
+    void remove();
+    void invalidateVerticalPositions();
+    bool attemptDirectLayerTranslation();
+    void updateWidgetMasks();
+
+    virtual void removeLeftoverAnonymousBoxes();
+
+    void arenaDelete(RenderArena *arena);
+
+private:
+    RenderStyle* m_style;
+    DOM::NodeImpl* m_node;
+    RenderObject *m_parent;
+    RenderObject *m_previous;
+    RenderObject *m_next;
+
+    short m_verticalPosition;
+
+    bool m_needsLayout               : 1;
+    bool m_normalChildNeedsLayout    : 1;
+    bool m_markedForRepaint          : 1;
+    bool m_posChildNeedsLayout       : 1;
+
+    bool m_minMaxKnown               : 1;
+    bool m_floating                  : 1;
+
+    bool m_positioned                : 1;
+    bool m_overhangingContents       : 1;
+    bool m_relPositioned             : 1;
+    bool m_paintBackground           : 1; // if the box has something to paint in the
+                                          // background painting phase (background, border, etc)
+
+    bool m_isAnonymous               : 1;
+    bool m_recalcMinMax 	     : 1;
+    bool m_isText                    : 1;
+    bool m_inline                    : 1;
+    bool m_attached                  : 1;
+
+    bool m_replaced                  : 1;
+    bool m_mouseInside               : 1;
+    bool m_hasFirstLine              : 1;
+    bool m_isSelectionBorder         : 1;
+
+    bool m_isRoot                    : 1;
+
+    bool m_beforePageBreak           : 1;
+    bool m_afterPageBreak            : 1;
+
+    bool m_needsPageClear            : 1;
+    bool m_containsPageBreak         : 1;
+    
+    bool m_hasOverflowClip           : 1;
+
+    bool m_doNotDelete 	             : 1; // This object should not be auto-deleted
+
+    // ### we have 16 + 26 bits.
+
+
+    void arenaDelete(RenderArena *arena, void *objectBase);
+
+    friend class RenderLayer;
+    friend class RenderListItem;
+    friend class RenderContainer;
+    friend class RenderCanvas;
+};
+
+
+enum VerticalPositionHint {
+    PositionTop = -0x4000,
+    PositionBottom = 0x4000,
+    PositionUndefined = 0x3fff
+};
+
+} //namespace
+#endif