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tdelibs/khtml/rendering/render_object.h

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/*
* 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
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