summaryrefslogtreecommitdiffstats
path: root/khtml/rendering/render_object.h
blob: 64cb581b334f458ec1831943b6ae9620bdb0f242 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
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 <tqcolor.h>
#include <tqrect.h>
#include <assert.h>
#include <tqvaluelist.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 TQRect getOverflowClipRect(int /*tx*/, int /*ty*/)
	{ return TQRect(0,0,0,0); }
    virtual TQRect getClipRect(int /*tx*/, int /*ty*/) { return TQRect(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 TQString& counter) const;
    // Calculates the value of the counter
    CounterNode* getCounter(const TQString& counter, bool view = false, bool counters = false);
    // Detaches all counterNodes
    void detachCounters();


protected:
    // Helper functions for counter-cache
    void insertCounter(const TQString& counter, CounterNode* value);
    CounterNode* lookupCounter(const TQString& 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
    TQString information() const;
    virtual void printTree(int indent=0) const;
    virtual void dump(TQTextStream &stream, const TQString &ind = TQString::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(TQPainter* _p, const TQRect& _r, PaintAction _phase)
           : p(_p), r(_r), phase(_phase), outlineObjects(0) {}
       ~PaintInfo() { delete outlineObjects; }
       TQPainter* p;
       TQRect     r;
       PaintAction phase;
       TQValueList<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(TQPainter *p, int _tx, int _ty, int w, int h, const RenderStyle* style, bool begin=true, bool end=true);
    void paintOutline(TQPainter *p, int _tx, int _ty, int w, int h, const RenderStyle* style);

    virtual void paintBoxDecorations(PaintInfo&, int /*_tx*/, int /*_ty*/) {}

    virtual void paintBackgroundExtended(TQPainter* /*p*/, const TQColor& /*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, TQColor& underline, TQColor& overline,
                                 TQColor& linethrough, bool quirksMode=false);

    enum BorderSide {
        BSTop, BSBottom, BSLeft, BSRight
    };
    void drawBorder(TQPainter *p, int x1, int y1, int x2, int y2, BorderSide s,
                    TQColor c, const TQColor& textcolor, EBorderStyle style,
                    int adjbw1, int adjbw2, bool invalidisInvert = false);

    // Used by collapsed border tables.
    virtual void collectBorders(TQValueList<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 TQFont &font(bool firstLine) const {
	return style( firstLine )->font();
    }

    const TQFontMetrics &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 TQPixmap &, const TQRect&, CachedImage *);

    TQRegion visibleFlowRegion(int x, int y) const;

protected:
    virtual void selectionStartEnd(int& spos, int& epos);

    virtual TQRect 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