forked from Floorp-Projects/Floorp
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathnsFrame.cpp
7485 lines (6595 loc) · 240 KB
/
nsFrame.cpp
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
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
// vim:cindent:ts=2:et:sw=2:
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
* Uri Bernstein <uriber@gmail.com>
* Eli Friedman <sharparrow1@yahoo.com>
* Mats Palmgren <mats.palmgren@bredband.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* base class of all rendering objects */
#include "nsCOMPtr.h"
#include "nsFrame.h"
#include "nsFrameList.h"
#include "nsLineLayout.h"
#include "nsIContent.h"
#include "nsContentUtils.h"
#include "nsIAtom.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsStyleContext.h"
#include "nsIView.h"
#include "nsIViewManager.h"
#include "nsIScrollableFrame.h"
#include "nsPresContext.h"
#include "nsCRT.h"
#include "nsGUIEvent.h"
#include "nsIDOMEvent.h"
#include "nsPLDOMEvent.h"
#include "nsStyleConsts.h"
#include "nsIPresShell.h"
#include "prlog.h"
#include "prprf.h"
#include <stdarg.h>
#include "nsFrameManager.h"
#include "nsCSSRendering.h"
#include "nsLayoutUtils.h"
#ifdef ACCESSIBILITY
#include "nsIAccessible.h"
#endif
#include "nsIDOMText.h"
#include "nsIDOMHTMLAnchorElement.h"
#include "nsIDOMHTMLAreaElement.h"
#include "nsIDOMHTMLImageElement.h"
#include "nsIDOMHTMLHRElement.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsIDeviceContext.h"
#include "nsIEditorDocShell.h"
#include "nsIEventStateManager.h"
#include "nsISelection.h"
#include "nsISelectionPrivate.h"
#include "nsFrameSelection.h"
#include "nsHTMLParts.h"
#include "nsGkAtoms.h"
#include "nsCSSAnonBoxes.h"
#include "nsCSSPseudoElements.h"
#include "nsIHTMLContentSink.h"
#include "nsCSSFrameConstructor.h"
#include "nsFrameTraversal.h"
#include "nsStyleChangeList.h"
#include "nsIDOMRange.h"
#include "nsITableLayout.h" //selection neccesity
#include "nsITableCellLayout.h"// "
#include "nsITextControlFrame.h"
#include "nsINameSpaceManager.h"
#include "nsIPercentHeightObserver.h"
#ifdef IBMBIDI
#include "nsBidiPresUtils.h"
#endif
// For triple-click pref
#include "nsIServiceManager.h"
#include "imgIContainer.h"
#include "imgIRequest.h"
#include "gfxIImageFrame.h"
#include "nsILookAndFeel.h"
#include "nsLayoutCID.h"
#include "nsWidgetsCID.h" // for NS_LOOKANDFEEL_CID
#include "nsUnicharUtils.h"
#include "nsLayoutErrors.h"
#include "nsContentErrors.h"
#include "nsHTMLContainerFrame.h"
#include "nsBoxLayoutState.h"
#include "nsBlockFrame.h"
#include "nsDisplayList.h"
#include "gfxContext.h"
static NS_DEFINE_CID(kLookAndFeelCID, NS_LOOKANDFEEL_CID);
static NS_DEFINE_CID(kWidgetCID, NS_CHILD_CID);
// Struct containing cached metrics for box-wrapped frames.
struct nsBoxLayoutMetrics
{
nsSize mPrefSize;
nsSize mMinSize;
nsSize mMaxSize;
nsSize mBlockMinSize;
nsSize mBlockPrefSize;
nscoord mBlockAscent;
nscoord mFlex;
nscoord mAscent;
nsSize mLastSize;
PRPackedBool mWasCollapsed;
};
struct nsContentAndOffset
{
nsIContent* mContent;
PRInt32 mOffset;
};
// Some Misc #defines
#define SELECTION_DEBUG 0
#define FORCE_SELECTION_UPDATE 1
#define CALC_DEBUG 0
#include "nsILineIterator.h"
//non Hack prototypes
#if 0
static void RefreshContentFrames(nsPresContext* aPresContext, nsIContent * aStartContent, nsIContent * aEndContent);
#endif
#include "prenv.h"
// start nsIFrameDebug
#ifdef NS_DEBUG
static PRBool gShowFrameBorders = PR_FALSE;
void nsIFrameDebug::ShowFrameBorders(PRBool aEnable)
{
gShowFrameBorders = aEnable;
}
PRBool nsIFrameDebug::GetShowFrameBorders()
{
return gShowFrameBorders;
}
static PRBool gShowEventTargetFrameBorder = PR_FALSE;
void nsIFrameDebug::ShowEventTargetFrameBorder(PRBool aEnable)
{
gShowEventTargetFrameBorder = aEnable;
}
PRBool nsIFrameDebug::GetShowEventTargetFrameBorder()
{
return gShowEventTargetFrameBorder;
}
/**
* Note: the log module is created during library initialization which
* means that you cannot perform logging before then.
*/
static PRLogModuleInfo* gLogModule;
static PRLogModuleInfo* gFrameVerifyTreeLogModuleInfo;
static PRBool gFrameVerifyTreeEnable = PRBool(0x55);
PRBool
nsIFrameDebug::GetVerifyTreeEnable()
{
if (gFrameVerifyTreeEnable == PRBool(0x55)) {
if (nsnull == gFrameVerifyTreeLogModuleInfo) {
gFrameVerifyTreeLogModuleInfo = PR_NewLogModule("frameverifytree");
gFrameVerifyTreeEnable = 0 != gFrameVerifyTreeLogModuleInfo->level;
}
}
return gFrameVerifyTreeEnable;
}
void
nsIFrameDebug::SetVerifyTreeEnable(PRBool aEnabled)
{
gFrameVerifyTreeEnable = aEnabled;
}
static PRLogModuleInfo* gStyleVerifyTreeLogModuleInfo;
static PRBool gStyleVerifyTreeEnable = PRBool(0x55);
PRBool
nsIFrameDebug::GetVerifyStyleTreeEnable()
{
if (gStyleVerifyTreeEnable == PRBool(0x55)) {
if (nsnull == gStyleVerifyTreeLogModuleInfo) {
gStyleVerifyTreeLogModuleInfo = PR_NewLogModule("styleverifytree");
gStyleVerifyTreeEnable = 0 != gStyleVerifyTreeLogModuleInfo->level;
}
}
return gStyleVerifyTreeEnable;
}
void
nsIFrameDebug::SetVerifyStyleTreeEnable(PRBool aEnabled)
{
gStyleVerifyTreeEnable = aEnabled;
}
PRLogModuleInfo*
nsIFrameDebug::GetLogModuleInfo()
{
if (nsnull == gLogModule) {
gLogModule = PR_NewLogModule("frame");
}
return gLogModule;
}
void
nsIFrameDebug::DumpFrameTree(nsIFrame* aFrame)
{
RootFrameList(aFrame->PresContext(), stdout, 0);
}
void
nsIFrameDebug::RootFrameList(nsPresContext* aPresContext, FILE* out, PRInt32 aIndent)
{
if((nsnull == aPresContext) || (nsnull == out))
return;
nsIPresShell *shell = aPresContext->GetPresShell();
if (nsnull != shell) {
nsIFrame* frame = shell->FrameManager()->GetRootFrame();
if(nsnull != frame) {
nsIFrameDebug* debugFrame;
nsresult rv;
rv = frame->QueryInterface(NS_GET_IID(nsIFrameDebug), (void**)&debugFrame);
if(NS_SUCCEEDED(rv))
debugFrame->List(out, aIndent);
}
}
}
#endif
// end nsIFrameDebug
void
NS_MergeReflowStatusInto(nsReflowStatus* aPrimary, nsReflowStatus aSecondary)
{
*aPrimary |= aSecondary &
(NS_FRAME_NOT_COMPLETE | NS_FRAME_OVERFLOW_INCOMPLETE |
NS_FRAME_TRUNCATED | NS_FRAME_REFLOW_NEXTINFLOW);
if (*aPrimary & NS_FRAME_NOT_COMPLETE) {
*aPrimary &= ~NS_FRAME_OVERFLOW_INCOMPLETE;
}
}
void
nsWeakFrame::Init(nsIFrame* aFrame)
{
Clear(mFrame ? mFrame->PresContext()->GetPresShell() : nsnull);
mFrame = aFrame;
if (mFrame) {
nsIPresShell* shell = mFrame->PresContext()->GetPresShell();
NS_WARN_IF_FALSE(shell, "Null PresShell in nsWeakFrame!");
if (shell) {
shell->AddWeakFrame(this);
} else {
mFrame = nsnull;
}
}
}
nsIFrame*
NS_NewEmptyFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsFrame(aContext);
}
// Overloaded new operator. Initializes the memory to 0 and relies on an arena
// (which comes from the presShell) to perform the allocation.
void*
nsFrame::operator new(size_t sz, nsIPresShell* aPresShell) CPP_THROW_NEW
{
// Check the recycle list first.
void* result = aPresShell->AllocateFrame(sz);
if (result) {
memset(result, 0, sz);
}
return result;
}
// Overridden to prevent the global delete from being called, since the memory
// came out of an nsIArena instead of the global delete operator's heap.
void
nsFrame::operator delete(void* aPtr, size_t sz)
{
// Don't let the memory be freed, since it will be recycled
// instead. Don't call the global operator delete.
// Stash the size of the object in the first four bytes of the
// freed up memory. The Destroy method can then use this information
// to recycle the object.
size_t* szPtr = (size_t*)aPtr;
*szPtr = sz;
}
nsFrame::nsFrame(nsStyleContext* aContext)
{
MOZ_COUNT_CTOR(nsFrame);
mState = NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY;
mStyleContext = aContext;
mStyleContext->AddRef();
}
nsFrame::~nsFrame()
{
MOZ_COUNT_DTOR(nsFrame);
NS_IF_RELEASE(mContent);
if (mStyleContext)
mStyleContext->Release();
}
/////////////////////////////////////////////////////////////////////////////
// nsISupports
NS_IMETHODIMP
nsFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
NS_PRECONDITION(aInstancePtr, "null out param");
#ifdef DEBUG
if (aIID.Equals(NS_GET_IID(nsIFrameDebug))) {
*aInstancePtr = static_cast<nsIFrameDebug*>(this);
return NS_OK;
}
#endif
if (aIID.Equals(NS_GET_IID(nsIFrame)) ||
aIID.Equals(NS_GET_IID(nsISupports))) {
*aInstancePtr = static_cast<nsIFrame*>(this);
return NS_OK;
}
*aInstancePtr = nsnull;
return NS_ERROR_NO_INTERFACE;
}
nsrefcnt nsFrame::AddRef(void)
{
NS_WARNING("not supported for frames");
return 1;
}
nsrefcnt nsFrame::Release(void)
{
NS_WARNING("not supported for frames");
return 1;
}
/////////////////////////////////////////////////////////////////////////////
// nsIFrame
NS_IMETHODIMP
nsFrame::Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow)
{
NS_PRECONDITION(!mContent, "Double-initing a frame?");
NS_ASSERTION(IsFrameOfType(eDEBUGAllFrames) &&
!IsFrameOfType(eDEBUGNoFrames),
"IsFrameOfType implementation that doesn't call base class");
mContent = aContent;
mParent = aParent;
if (aContent) {
NS_ADDREF(aContent);
aContent->SetMayHaveFrame(PR_TRUE);
NS_ASSERTION(mContent->MayHaveFrame(), "SetMayHaveFrame failed?");
}
if (aPrevInFlow) {
// Make sure the general flags bits are the same
nsFrameState state = aPrevInFlow->GetStateBits();
// Make bits that are currently off (see constructor) the same:
mState |= state & (NS_FRAME_SELECTED_CONTENT |
NS_FRAME_INDEPENDENT_SELECTION |
NS_FRAME_IS_SPECIAL);
}
if (mParent) {
nsFrameState state = mParent->GetStateBits();
// Make bits that are currently off (see constructor) the same:
mState |= state & (NS_FRAME_INDEPENDENT_SELECTION |
NS_FRAME_GENERATED_CONTENT);
}
DidSetStyleContext();
if (IsBoxWrapped())
InitBoxMetrics(PR_FALSE);
return NS_OK;
}
NS_IMETHODIMP nsFrame::SetInitialChildList(nsIAtom* aListName,
nsIFrame* aChildList)
{
// XXX This shouldn't be getting called at all, but currently is for backwards
// compatility reasons...
#if 0
NS_ERROR("not a container");
return NS_ERROR_UNEXPECTED;
#else
NS_ASSERTION(nsnull == aChildList, "not a container");
return NS_OK;
#endif
}
NS_IMETHODIMP
nsFrame::AppendFrames(nsIAtom* aListName,
nsIFrame* aFrameList)
{
NS_PRECONDITION(PR_FALSE, "not a container");
return NS_ERROR_UNEXPECTED;
}
NS_IMETHODIMP
nsFrame::InsertFrames(nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
NS_PRECONDITION(PR_FALSE, "not a container");
return NS_ERROR_UNEXPECTED;
}
NS_IMETHODIMP
nsFrame::RemoveFrame(nsIAtom* aListName,
nsIFrame* aOldFrame)
{
NS_PRECONDITION(PR_FALSE, "not a container");
return NS_ERROR_UNEXPECTED;
}
void
nsFrame::Destroy()
{
// Get the view pointer now before the frame properties disappear
// when we call NotifyDestroyingFrame()
nsIView* view = GetView();
nsPresContext* presContext = PresContext();
nsIPresShell *shell = presContext->GetPresShell();
NS_ASSERTION(!(mState & NS_FRAME_OUT_OF_FLOW) ||
!shell->FrameManager()->GetPlaceholderFrameFor(this),
"Deleting out of flow without tearing down placeholder "
"relationship; see comments in nsFrame.h");
shell->NotifyDestroyingFrame(this);
if ((mState & NS_FRAME_EXTERNAL_REFERENCE) ||
(mState & NS_FRAME_SELECTED_CONTENT)) {
shell->ClearFrameRefs(this);
}
//XXX Why is this done in nsFrame instead of some frame class
// that actually loads images?
presContext->StopImagesFor(this);
if (view) {
// Break association between view and frame
view->SetClientData(nsnull);
// Destroy the view
view->Destroy();
}
// Deleting the frame doesn't really free the memory, since we're using an
// arena for allocation, but we will get our destructors called.
delete this;
// Now that we're totally cleaned out, we need to add ourselves to the presshell's
// recycler.
size_t* sz = (size_t*)this;
shell->FreeFrame(*sz, (void*)this);
}
NS_IMETHODIMP
nsFrame::GetOffsets(PRInt32 &aStart, PRInt32 &aEnd) const
{
aStart = 0;
aEnd = 0;
return NS_OK;
}
// Subclass hook for style post processing
NS_IMETHODIMP nsFrame::DidSetStyleContext()
{
return NS_OK;
}
/* virtual */ nsMargin
nsIFrame::GetUsedMargin() const
{
NS_ASSERTION(nsLayoutUtils::sDisableGetUsedXAssertions ||
!NS_SUBTREE_DIRTY(this) ||
(GetStateBits() & NS_FRAME_IN_REFLOW),
"cannot call GetUsedMargin on a dirty frame not currently "
"being reflowed");
nsMargin margin(0, 0, 0, 0);
if (!GetStyleMargin()->GetMargin(margin)) {
nsMargin *m = static_cast<nsMargin*>
(GetProperty(nsGkAtoms::usedMarginProperty));
NS_ASSERTION(m, "used margin property missing (out of memory?)");
if (m) {
margin = *m;
}
}
return margin;
}
/* virtual */ nsMargin
nsIFrame::GetUsedBorder() const
{
NS_ASSERTION(nsLayoutUtils::sDisableGetUsedXAssertions ||
!NS_SUBTREE_DIRTY(this) ||
(GetStateBits() & NS_FRAME_IN_REFLOW),
"cannot call GetUsedBorder on a dirty frame not currently "
"being reflowed");
// Theme methods don't use const-ness.
nsIFrame *mutable_this = const_cast<nsIFrame*>(this);
const nsStyleDisplay *disp = GetStyleDisplay();
if (mutable_this->IsThemed(disp)) {
nsMargin result;
nsPresContext *presContext = PresContext();
presContext->GetTheme()->GetWidgetBorder(presContext->DeviceContext(),
mutable_this, disp->mAppearance,
&result);
result.top = presContext->DevPixelsToAppUnits(result.top);
result.right = presContext->DevPixelsToAppUnits(result.right);
result.bottom = presContext->DevPixelsToAppUnits(result.bottom);
result.left = presContext->DevPixelsToAppUnits(result.left);
return result;
}
return GetStyleBorder()->GetActualBorder();
}
/* virtual */ nsMargin
nsIFrame::GetUsedPadding() const
{
NS_ASSERTION(nsLayoutUtils::sDisableGetUsedXAssertions ||
!NS_SUBTREE_DIRTY(this) ||
(GetStateBits() & NS_FRAME_IN_REFLOW),
"cannot call GetUsedPadding on a dirty frame not currently "
"being reflowed");
nsMargin padding(0, 0, 0, 0);
// Theme methods don't use const-ness.
nsIFrame *mutable_this = const_cast<nsIFrame*>(this);
const nsStyleDisplay *disp = GetStyleDisplay();
if (mutable_this->IsThemed(disp)) {
nsPresContext *presContext = PresContext();
if (presContext->GetTheme()->GetWidgetPadding(presContext->DeviceContext(),
mutable_this,
disp->mAppearance,
&padding)) {
padding.top = presContext->DevPixelsToAppUnits(padding.top);
padding.right = presContext->DevPixelsToAppUnits(padding.right);
padding.bottom = presContext->DevPixelsToAppUnits(padding.bottom);
padding.left = presContext->DevPixelsToAppUnits(padding.left);
return padding;
}
}
if (!GetStylePadding()->GetPadding(padding)) {
nsMargin *p = static_cast<nsMargin*>
(GetProperty(nsGkAtoms::usedPaddingProperty));
NS_ASSERTION(p, "used padding property missing (out of memory?)");
if (p) {
padding = *p;
}
}
return padding;
}
void
nsIFrame::ApplySkipSides(nsMargin& aMargin) const
{
PRIntn skipSides = GetSkipSides();
if (skipSides & (1 << NS_SIDE_TOP))
aMargin.top = 0;
if (skipSides & (1 << NS_SIDE_RIGHT))
aMargin.right = 0;
if (skipSides & (1 << NS_SIDE_BOTTOM))
aMargin.bottom = 0;
if (skipSides & (1 << NS_SIDE_LEFT))
aMargin.left = 0;
}
nsRect
nsIFrame::GetMarginRect() const
{
nsMargin m(GetUsedMargin());
ApplySkipSides(m);
nsRect r(mRect);
r.Inflate(m);
return r;
}
nsRect
nsIFrame::GetPaddingRect() const
{
nsMargin b(GetUsedBorder());
ApplySkipSides(b);
nsRect r(mRect);
r.Deflate(b);
return r;
}
nsRect
nsIFrame::GetContentRect() const
{
nsMargin bp(GetUsedBorderAndPadding());
ApplySkipSides(bp);
nsRect r(mRect);
r.Deflate(bp);
return r;
}
nsStyleContext*
nsFrame::GetAdditionalStyleContext(PRInt32 aIndex) const
{
NS_PRECONDITION(aIndex >= 0, "invalid index number");
return nsnull;
}
void
nsFrame::SetAdditionalStyleContext(PRInt32 aIndex,
nsStyleContext* aStyleContext)
{
NS_PRECONDITION(aIndex >= 0, "invalid index number");
}
nscoord
nsFrame::GetBaseline() const
{
NS_ASSERTION(!NS_SUBTREE_DIRTY(this),
"frame must not be dirty");
// Default to the bottom margin edge, per CSS2.1's definition of the
// 'baseline' value of 'vertical-align'.
return mRect.height + GetUsedMargin().bottom;
}
// Child frame enumeration
nsIAtom*
nsFrame::GetAdditionalChildListName(PRInt32 aIndex) const
{
NS_PRECONDITION(aIndex >= 0, "invalid index number");
return nsnull;
}
nsIFrame*
nsFrame::GetFirstChild(nsIAtom* aListName) const
{
return nsnull;
}
static nsIFrame*
GetActiveSelectionFrame(nsIFrame* aFrame)
{
nsIView* mouseGrabber;
aFrame->PresContext()->GetViewManager()->GetMouseEventGrabber(mouseGrabber);
if (mouseGrabber) {
nsIFrame* activeFrame = nsLayoutUtils::GetFrameFor(mouseGrabber);
if (activeFrame) {
return activeFrame;
}
}
return aFrame;
}
PRInt16
nsFrame::DisplaySelection(nsPresContext* aPresContext, PRBool isOkToTurnOn)
{
PRInt16 selType = nsISelectionController::SELECTION_OFF;
nsCOMPtr<nsISelectionController> selCon;
nsresult result = GetSelectionController(aPresContext, getter_AddRefs(selCon));
if (NS_SUCCEEDED(result) && selCon) {
result = selCon->GetDisplaySelection(&selType);
if (NS_SUCCEEDED(result) && (selType != nsISelectionController::SELECTION_OFF)) {
// Check whether style allows selection.
PRBool selectable;
IsSelectable(&selectable, nsnull);
if (!selectable) {
selType = nsISelectionController::SELECTION_OFF;
isOkToTurnOn = PR_FALSE;
}
}
if (isOkToTurnOn && (selType == nsISelectionController::SELECTION_OFF)) {
selCon->SetDisplaySelection(nsISelectionController::SELECTION_ON);
selType = nsISelectionController::SELECTION_ON;
}
}
return selType;
}
class nsDisplaySelectionOverlay : public nsDisplayItem {
public:
nsDisplaySelectionOverlay(nsFrame* aFrame, PRInt16 aSelectionValue)
: nsDisplayItem(aFrame), mSelectionValue(aSelectionValue) {
MOZ_COUNT_CTOR(nsDisplaySelectionOverlay);
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplaySelectionOverlay() {
MOZ_COUNT_DTOR(nsDisplaySelectionOverlay);
}
#endif
virtual void Paint(nsDisplayListBuilder* aBuilder, nsIRenderingContext* aCtx,
const nsRect& aDirtyRect);
NS_DISPLAY_DECL_NAME("SelectionOverlay")
private:
PRInt16 mSelectionValue;
};
void nsDisplaySelectionOverlay::Paint(nsDisplayListBuilder* aBuilder,
nsIRenderingContext* aCtx, const nsRect& aDirtyRect)
{
nscolor color = NS_RGB(255, 255, 255);
nsILookAndFeel::nsColorID colorID;
nsresult result;
if (mSelectionValue == nsISelectionController::SELECTION_ON) {
colorID = nsILookAndFeel::eColor_TextSelectBackground;
} else if (mSelectionValue == nsISelectionController::SELECTION_ATTENTION) {
colorID = nsILookAndFeel::eColor_TextSelectBackgroundAttention;
} else {
colorID = nsILookAndFeel::eColor_TextSelectBackgroundDisabled;
}
nsCOMPtr<nsILookAndFeel> look;
look = do_GetService(kLookAndFeelCID, &result);
if (NS_SUCCEEDED(result) && look)
look->GetColor(colorID, color);
gfxRGBA c(color);
c.a = .5;
gfxContext *ctx = aCtx->ThebesContext();
ctx->SetColor(c);
nsRect rect(aBuilder->ToReferenceFrame(mFrame), mFrame->GetSize());
rect.IntersectRect(rect, aDirtyRect);
rect.ScaleRoundOut(1.0f / mFrame->PresContext()->AppUnitsPerDevPixel());
ctx->NewPath();
ctx->Rectangle(gfxRect(rect.x, rect.y, rect.width, rect.height), PR_TRUE);
ctx->Fill();
}
/********************************************************
* Refreshes each content's frame
*********************************************************/
nsresult
nsFrame::DisplaySelectionOverlay(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists,
PRUint16 aContentType)
{
//check frame selection state
if ((GetStateBits() & NS_FRAME_SELECTED_CONTENT) != NS_FRAME_SELECTED_CONTENT)
return NS_OK;
if (!IsVisibleForPainting(aBuilder))
return NS_OK;
nsPresContext* presContext = PresContext();
nsIPresShell *shell = presContext->PresShell();
if (!shell)
return NS_OK;
PRInt16 displaySelection;
nsresult rv = shell->GetSelectionFlags(&displaySelection);
if (NS_FAILED(rv))
return rv;
if (!(displaySelection & aContentType))
return NS_OK;
const nsFrameSelection* frameSelection = GetConstFrameSelection();
PRInt16 selectionValue = frameSelection->GetDisplaySelection();
if (selectionValue <= nsISelectionController::SELECTION_HIDDEN)
return NS_OK; // selection is hidden or off
nsIContent *newContent = mContent->GetParent();
//check to see if we are anonymous content
PRInt32 offset = 0;
if (newContent) {
// XXXbz there has GOT to be a better way of determining this!
offset = newContent->IndexOf(mContent);
}
SelectionDetails *details;
//look up to see what selection(s) are on this frame
details = frameSelection->LookUpSelection(newContent, offset, 1, PR_FALSE);
// XXX is the above really necessary? We don't actually DO anything
// with the details other than test that they're non-null
if (!details)
return NS_OK;
while (details) {
SelectionDetails *next = details->mNext;
delete details;
details = next;
}
return aLists.Content()->AppendNewToTop(new (aBuilder)
nsDisplaySelectionOverlay(this, selectionValue));
}
nsresult
nsFrame::DisplayOutlineUnconditional(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists)
{
if (GetStyleOutline()->GetOutlineStyle() == NS_STYLE_BORDER_STYLE_NONE)
return NS_OK;
return aLists.Outlines()->AppendNewToTop(new (aBuilder) nsDisplayOutline(this));
}
nsresult
nsFrame::DisplayOutline(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists)
{
if (!IsVisibleForPainting(aBuilder))
return NS_OK;
return DisplayOutlineUnconditional(aBuilder, aLists);
}
nsresult
nsIFrame::DisplayCaret(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect, const nsDisplayListSet& aLists)
{
if (!IsVisibleForPainting(aBuilder))
return NS_OK;
return aLists.Content()->AppendNewToTop(
new (aBuilder) nsDisplayCaret(this, aBuilder->GetCaret()));
}
PRBool
nsFrame::HasBorder() const
{
return GetUsedBorder() != nsMargin(0,0,0,0);
}
nsresult
nsFrame::DisplayBorderBackgroundOutline(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists,
PRBool aForceBackground)
{
// The visibility check belongs here since child elements have the
// opportunity to override the visibility property and display even if
// their parent is hidden.
if (!IsVisibleForPainting(aBuilder))
return NS_OK;
if (GetStyleBorder()->mBoxShadow) {
nsresult rv = aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
nsDisplayBoxShadow(this));
NS_ENSURE_SUCCESS(rv, rv);
}
// Here we don't try to detect background propagation. Frames that might
// receive a propagated background should just set aForceBackground to
// PR_TRUE.
if (aBuilder->IsForEventDelivery() || aForceBackground ||
!GetStyleBackground()->IsTransparent() || GetStyleDisplay()->mAppearance) {
nsresult rv = aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
nsDisplayBackground(this));
NS_ENSURE_SUCCESS(rv, rv);
}
if (HasBorder()) {
nsresult rv = aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
nsDisplayBorder(this));
NS_ENSURE_SUCCESS(rv, rv);
}
return DisplayOutlineUnconditional(aBuilder, aLists);
}
PRBool
nsIFrame::GetAbsPosClipRect(const nsStyleDisplay* aDisp, nsRect* aRect,
const nsSize& aSize)
{
NS_PRECONDITION(aRect, "Must have aRect out parameter");
if (!aDisp->IsAbsolutelyPositioned() ||
!(aDisp->mClipFlags & NS_STYLE_CLIP_RECT))
return PR_FALSE;
*aRect = aDisp->mClip;
if (NS_STYLE_CLIP_RIGHT_AUTO & aDisp->mClipFlags) {
aRect->width = aSize.width - aRect->x;
}
if (NS_STYLE_CLIP_BOTTOM_AUTO & aDisp->mClipFlags) {
aRect->height = aSize.height - aRect->y;
}
return PR_TRUE;
}
static PRBool ApplyAbsPosClipping(nsDisplayListBuilder* aBuilder,
const nsStyleDisplay* aDisp, nsIFrame* aFrame,
nsRect* aRect) {
if (!aFrame->GetAbsPosClipRect(aDisp, aRect, aFrame->GetSize()))
return PR_FALSE;
// A moving frame should not be allowed to clip a non-moving frame.
// Abs-pos clipping always clips frames below it in the frame tree, except
// for when an abs-pos frame clips a fixed-pos frame. So when fixed-pos
// elements are present we do not allow a moving abs-pos frame with
// an out-of-flow descendant (which could be a fixed frame) child to clip
// anything. It's OK to not clip anything, even the moving children ...
// all that could happen is that we get unnecessarily conservative results
// for nsLayoutUtils::ComputeRepaintRegionForCopy ... but this is a rare
// situation.
if (aBuilder->HasMovingFrames() &&
aFrame->PresContext()->FrameManager()->GetRootFrame()->
GetFirstChild(nsGkAtoms::fixedList) &&
aBuilder->IsMovingFrame(aFrame))
return PR_FALSE;
*aRect += aBuilder->ToReferenceFrame(aFrame);
return PR_TRUE;
}
/**
* Returns PR_TRUE if aFrame is overflow:hidden and we should interpret
* that as -moz-hidden-unscrollable.
*/
static PRBool ApplyOverflowHiddenClipping(nsIFrame* aFrame,
const nsStyleDisplay* aDisp)
{
if (aDisp->mOverflowX != NS_STYLE_OVERFLOW_HIDDEN)
return PR_FALSE;
nsIAtom* type = aFrame->GetType();
// REVIEW: these are the frame types that call IsTableClip and set up
// clipping. Actually there were also table rows and the inner table frame
// doing this, but 'overflow' isn't applicable to them according to