forked from mozilla/gecko-dev
-
Notifications
You must be signed in to change notification settings - Fork 2
/
nsComboboxControlFrame.cpp
1523 lines (1295 loc) · 48.9 KB
/
nsComboboxControlFrame.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 -*- */
/* ***** 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>
* 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 ***** */
#include "nsCOMPtr.h"
#include "nsReadableUtils.h"
#include "nsComboboxControlFrame.h"
#include "nsIDOMEventTarget.h"
#include "nsFrameManager.h"
#include "nsFormControlFrame.h"
#include "nsGfxButtonControlFrame.h"
#include "nsGkAtoms.h"
#include "nsCSSAnonBoxes.h"
#include "nsHTMLParts.h"
#include "nsIFormControl.h"
#include "nsINameSpaceManager.h"
#include "nsIDOMElement.h"
#include "nsIListControlFrame.h"
#include "nsIDOMHTMLCollection.h"
#include "nsIDOMHTMLSelectElement.h"
#include "nsIDOMHTMLOptionElement.h"
#include "nsIDOMNSHTMLOptionCollectn.h"
#include "nsPIDOMWindow.h"
#include "nsIPresShell.h"
#include "nsIView.h"
#include "nsIViewManager.h"
#include "nsEventDispatcher.h"
#include "nsIEventListenerManager.h"
#include "nsIDOMNode.h"
#include "nsIPrivateDOMEvent.h"
#include "nsISelectControlFrame.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"
#include "nsIComponentManager.h"
#include "nsContentUtils.h"
#include "nsTextFragment.h"
#include "nsCSSFrameConstructor.h"
#include "nsIDocument.h"
#include "nsINodeInfo.h"
#include "nsIScrollableFrame.h"
#include "nsListControlFrame.h"
#include "nsContentCID.h"
#ifdef ACCESSIBILITY
#include "nsAccessibilityService.h"
#endif
#include "nsIServiceManager.h"
#include "nsIDOMNode.h"
#include "nsGUIEvent.h"
#include "nsAutoPtr.h"
#include "nsStyleSet.h"
#include "nsNodeInfoManager.h"
#include "nsContentCreatorFunctions.h"
#include "nsLayoutUtils.h"
#include "nsDisplayList.h"
#include "nsITheme.h"
#include "nsThemeConstants.h"
#include "nsPLDOMEvent.h"
#include "nsRenderingContext.h"
namespace dom = mozilla::dom;
NS_IMETHODIMP
nsComboboxControlFrame::RedisplayTextEvent::Run()
{
if (mControlFrame)
mControlFrame->HandleRedisplayTextEvent();
return NS_OK;
}
class nsPresState;
#define FIX_FOR_BUG_53259
// Drop down list event management.
// The combo box uses the following strategy for managing the drop-down list.
// If the combo box or it's arrow button is clicked on the drop-down list is displayed
// If mouse exit's the combo box with the drop-down list displayed the drop-down list
// is asked to capture events
// The drop-down list will capture all events including mouse down and up and will always
// return with ListWasSelected method call regardless of whether an item in the list was
// actually selected.
// The ListWasSelected code will turn off mouse-capture for the drop-down list.
// The drop-down list does not explicitly set capture when it is in the drop-down mode.
//XXX: This is temporary. It simulates pseudo states by using a attribute selector on
const PRInt32 kSizeNotSet = -1;
/**
* Helper class that listens to the combo boxes button. If the button is pressed the
* combo box is toggled to open or close. this is used by Accessibility which presses
* that button Programmatically.
*/
class nsComboButtonListener: public nsIDOMMouseListener
{
public:
NS_DECL_ISUPPORTS
NS_IMETHOD HandleEvent(nsIDOMEvent* anEvent) { return PR_FALSE; }
NS_IMETHOD MouseDown(nsIDOMEvent* aMouseEvent) { return PR_FALSE; }
NS_IMETHOD MouseUp(nsIDOMEvent* aMouseEvent) { return PR_FALSE; }
NS_IMETHOD MouseDblClick(nsIDOMEvent* aMouseEvent) { return PR_FALSE; }
NS_IMETHOD MouseOver(nsIDOMEvent* aMouseEvent) { return PR_FALSE; }
NS_IMETHOD MouseOut(nsIDOMEvent* aMouseEvent) { return PR_FALSE; }
NS_IMETHOD MouseClick(nsIDOMEvent* aMouseEvent)
{
mComboBox->ShowDropDown(!mComboBox->IsDroppedDown());
return NS_OK;
}
nsComboButtonListener(nsComboboxControlFrame* aCombobox)
{
mComboBox = aCombobox;
}
virtual ~nsComboButtonListener() {}
nsComboboxControlFrame* mComboBox;
};
NS_IMPL_ISUPPORTS2(nsComboButtonListener,
nsIDOMMouseListener,
nsIDOMEventListener)
// static class data member for Bug 32920
nsComboboxControlFrame * nsComboboxControlFrame::mFocused = nsnull;
nsIFrame*
NS_NewComboboxControlFrame(nsIPresShell* aPresShell, nsStyleContext* aContext, PRUint32 aStateFlags)
{
nsComboboxControlFrame* it = new (aPresShell) nsComboboxControlFrame(aContext);
if (it) {
// set the state flags (if any are provided)
it->AddStateBits(aStateFlags);
}
return it;
}
NS_IMPL_FRAMEARENA_HELPERS(nsComboboxControlFrame)
//-----------------------------------------------------------
// Reflow Debugging Macros
// These let us "see" how many reflow counts are happening
//-----------------------------------------------------------
#ifdef DO_REFLOW_COUNTER
#define MAX_REFLOW_CNT 1024
static PRInt32 gTotalReqs = 0;;
static PRInt32 gTotalReflows = 0;;
static PRInt32 gReflowControlCntRQ[MAX_REFLOW_CNT];
static PRInt32 gReflowControlCnt[MAX_REFLOW_CNT];
static PRInt32 gReflowInx = -1;
#define REFLOW_COUNTER() \
if (mReflowId > -1) \
gReflowControlCnt[mReflowId]++;
#define REFLOW_COUNTER_REQUEST() \
if (mReflowId > -1) \
gReflowControlCntRQ[mReflowId]++;
#define REFLOW_COUNTER_DUMP(__desc) \
if (mReflowId > -1) {\
gTotalReqs += gReflowControlCntRQ[mReflowId];\
gTotalReflows += gReflowControlCnt[mReflowId];\
printf("** Id:%5d %s RF: %d RQ: %d %d/%d %5.2f\n", \
mReflowId, (__desc), \
gReflowControlCnt[mReflowId], \
gReflowControlCntRQ[mReflowId],\
gTotalReflows, gTotalReqs, float(gTotalReflows)/float(gTotalReqs)*100.0f);\
}
#define REFLOW_COUNTER_INIT() \
if (gReflowInx < MAX_REFLOW_CNT) { \
gReflowInx++; \
mReflowId = gReflowInx; \
gReflowControlCnt[mReflowId] = 0; \
gReflowControlCntRQ[mReflowId] = 0; \
} else { \
mReflowId = -1; \
}
// reflow messages
#define REFLOW_DEBUG_MSG(_msg1) printf((_msg1))
#define REFLOW_DEBUG_MSG2(_msg1, _msg2) printf((_msg1), (_msg2))
#define REFLOW_DEBUG_MSG3(_msg1, _msg2, _msg3) printf((_msg1), (_msg2), (_msg3))
#define REFLOW_DEBUG_MSG4(_msg1, _msg2, _msg3, _msg4) printf((_msg1), (_msg2), (_msg3), (_msg4))
#else //-------------
#define REFLOW_COUNTER_REQUEST()
#define REFLOW_COUNTER()
#define REFLOW_COUNTER_DUMP(__desc)
#define REFLOW_COUNTER_INIT()
#define REFLOW_DEBUG_MSG(_msg)
#define REFLOW_DEBUG_MSG2(_msg1, _msg2)
#define REFLOW_DEBUG_MSG3(_msg1, _msg2, _msg3)
#define REFLOW_DEBUG_MSG4(_msg1, _msg2, _msg3, _msg4)
#endif
//------------------------------------------
// This is for being VERY noisy
//------------------------------------------
#ifdef DO_VERY_NOISY
#define REFLOW_NOISY_MSG(_msg1) printf((_msg1))
#define REFLOW_NOISY_MSG2(_msg1, _msg2) printf((_msg1), (_msg2))
#define REFLOW_NOISY_MSG3(_msg1, _msg2, _msg3) printf((_msg1), (_msg2), (_msg3))
#define REFLOW_NOISY_MSG4(_msg1, _msg2, _msg3, _msg4) printf((_msg1), (_msg2), (_msg3), (_msg4))
#else
#define REFLOW_NOISY_MSG(_msg)
#define REFLOW_NOISY_MSG2(_msg1, _msg2)
#define REFLOW_NOISY_MSG3(_msg1, _msg2, _msg3)
#define REFLOW_NOISY_MSG4(_msg1, _msg2, _msg3, _msg4)
#endif
//------------------------------------------
// Displays value in pixels or twips
//------------------------------------------
#ifdef DO_PIXELS
#define PX(__v) __v / 15
#else
#define PX(__v) __v
#endif
//------------------------------------------------------
//-- Done with macros
//------------------------------------------------------
nsComboboxControlFrame::nsComboboxControlFrame(nsStyleContext* aContext)
: nsBlockFrame(aContext),
mDisplayWidth(0)
{
mListControlFrame = nsnull;
mDroppedDown = PR_FALSE;
mDisplayFrame = nsnull;
mButtonFrame = nsnull;
mDropdownFrame = nsnull;
mInRedisplayText = PR_FALSE;
mRecentSelectedIndex = NS_SKIP_NOTIFY_INDEX;
REFLOW_COUNTER_INIT()
}
//--------------------------------------------------------------
nsComboboxControlFrame::~nsComboboxControlFrame()
{
REFLOW_COUNTER_DUMP("nsCCF");
}
//--------------------------------------------------------------
NS_QUERYFRAME_HEAD(nsComboboxControlFrame)
NS_QUERYFRAME_ENTRY(nsIComboboxControlFrame)
NS_QUERYFRAME_ENTRY(nsIFormControlFrame)
NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
NS_QUERYFRAME_ENTRY(nsISelectControlFrame)
NS_QUERYFRAME_ENTRY(nsIStatefulFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame)
#ifdef ACCESSIBILITY
already_AddRefed<nsAccessible>
nsComboboxControlFrame::CreateAccessible()
{
nsAccessibilityService* accService = nsIPresShell::AccService();
if (accService) {
return accService->CreateHTMLComboboxAccessible(mContent,
PresContext()->PresShell());
}
return nsnull;
}
#endif
void
nsComboboxControlFrame::SetFocus(PRBool aOn, PRBool aRepaint)
{
nsWeakFrame weakFrame(this);
if (aOn) {
nsListControlFrame::ComboboxFocusSet();
mFocused = this;
} else {
mFocused = nsnull;
if (mDroppedDown) {
mListControlFrame->ComboboxFinish(mDisplayedIndex); // might destroy us
if (!weakFrame.IsAlive()) {
return;
}
}
// May delete |this|.
mListControlFrame->FireOnChange();
}
if (!weakFrame.IsAlive()) {
return;
}
// This is needed on a temporary basis. It causes the focus
// rect to be drawn. This is much faster than ReResolvingStyle
// Bug 32920
Invalidate(nsRect(0,0,mRect.width,mRect.height));
// Make sure the content area gets updated for where the dropdown was
// This is only needed for embedding, the focus may go to
// the chrome that is not part of the Gecko system (Bug 83493)
// XXX this is rather inefficient
nsIViewManager* vm = PresContext()->GetPresShell()->GetViewManager();
if (vm) {
vm->UpdateAllViews(NS_VMREFRESH_NO_SYNC);
}
}
void
nsComboboxControlFrame::ShowPopup(PRBool aShowPopup)
{
nsIView* view = mDropdownFrame->GetView();
nsIViewManager* viewManager = view->GetViewManager();
if (aShowPopup) {
nsRect rect = mDropdownFrame->GetRect();
rect.x = rect.y = 0;
viewManager->ResizeView(view, rect);
viewManager->SetViewVisibility(view, nsViewVisibility_kShow);
} else {
viewManager->SetViewVisibility(view, nsViewVisibility_kHide);
nsRect emptyRect(0, 0, 0, 0);
viewManager->ResizeView(view, emptyRect);
}
// fire a popup dom event
nsEventStatus status = nsEventStatus_eIgnore;
nsMouseEvent event(PR_TRUE, aShowPopup ?
NS_XUL_POPUP_SHOWING : NS_XUL_POPUP_HIDING, nsnull,
nsMouseEvent::eReal);
nsCOMPtr<nsIPresShell> shell = PresContext()->GetPresShell();
if (shell)
shell->HandleDOMEventWithTarget(mContent, &event, &status);
}
PRBool
nsComboboxControlFrame::ShowList(PRBool aShowList)
{
nsCOMPtr<nsIPresShell> shell = PresContext()->GetPresShell();
nsWeakFrame weakFrame(this);
if (aShowList) {
nsIView* view = mDropdownFrame->GetView();
NS_ASSERTION(!view->HasWidget(),
"We shoudldn't have a widget before we need to display the popup");
// Create the widget for the drop-down list
view->GetViewManager()->SetViewFloating(view, PR_TRUE);
nsWidgetInitData widgetData;
widgetData.mWindowType = eWindowType_popup;
widgetData.mBorderStyle = eBorderStyle_default;
view->CreateWidgetForPopup(&widgetData);
}
ShowPopup(aShowList); // might destroy us
if (!weakFrame.IsAlive()) {
return PR_FALSE;
}
mDroppedDown = aShowList;
if (mDroppedDown) {
// The listcontrol frame will call back to the nsComboboxControlFrame's
// ListWasSelected which will stop the capture.
mListControlFrame->AboutToDropDown();
mListControlFrame->CaptureMouseEvents(PR_TRUE);
}
// XXXbz so why do we need to flush here, exactly?
shell->GetDocument()->FlushPendingNotifications(Flush_Layout);
if (!weakFrame.IsAlive()) {
return PR_FALSE;
}
nsIFrame* listFrame = do_QueryFrame(mListControlFrame);
if (listFrame) {
nsIView* view = listFrame->GetView();
NS_ASSERTION(view, "nsComboboxControlFrame view is null");
if (view) {
nsIWidget* widget = view->GetWidget();
if (widget) {
widget->CaptureRollupEvents(this, nsnull, mDroppedDown, mDroppedDown);
if (!aShowList) {
view->DestroyWidget();
}
}
}
}
return weakFrame.IsAlive();
}
nsresult
nsComboboxControlFrame::ReflowDropdown(nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState)
{
// All we want out of it later on, really, is the height of a row, so we
// don't even need to cache mDropdownFrame's ascent or anything. If we don't
// need to reflow it, just bail out here.
if (!aReflowState.ShouldReflowAllKids() &&
!NS_SUBTREE_DIRTY(mDropdownFrame)) {
return NS_OK;
}
// XXXbz this will, for small-height dropdowns, have extra space on the right
// edge for the scrollbar we don't show... but that's the best we can do here
// for now.
nsSize availSize(aReflowState.availableWidth, NS_UNCONSTRAINEDSIZE);
nsHTMLReflowState kidReflowState(aPresContext, aReflowState, mDropdownFrame,
availSize);
// If the dropdown's intrinsic width is narrower than our specified width,
// then expand it out. We want our border-box width to end up the same as
// the dropdown's so account for both sets of mComputedBorderPadding.
nscoord forcedWidth = aReflowState.ComputedWidth() +
aReflowState.mComputedBorderPadding.LeftRight() -
kidReflowState.mComputedBorderPadding.LeftRight();
kidReflowState.SetComputedWidth(NS_MAX(kidReflowState.ComputedWidth(),
forcedWidth));
// ensure we start off hidden
if (GetStateBits() & NS_FRAME_FIRST_REFLOW) {
nsIView* view = mDropdownFrame->GetView();
nsIViewManager* viewManager = view->GetViewManager();
viewManager->SetViewVisibility(view, nsViewVisibility_kHide);
nsRect emptyRect(0, 0, 0, 0);
viewManager->ResizeView(view, emptyRect);
}
// Allow the child to move/size/change-visibility its view if it's currently
// dropped down
PRInt32 flags = NS_FRAME_NO_MOVE_FRAME | NS_FRAME_NO_VISIBILITY | NS_FRAME_NO_SIZE_VIEW;
if (mDroppedDown) {
flags = 0;
}
nsRect rect = mDropdownFrame->GetRect();
nsHTMLReflowMetrics desiredSize;
nsReflowStatus ignoredStatus;
nsresult rv = ReflowChild(mDropdownFrame, aPresContext, desiredSize,
kidReflowState, rect.x, rect.y, flags,
ignoredStatus);
// Set the child's width and height to it's desired size
FinishReflowChild(mDropdownFrame, aPresContext, &kidReflowState,
desiredSize, rect.x, rect.y, flags);
return rv;
}
void
nsComboboxControlFrame::AbsolutelyPositionDropDown()
{
// Position the dropdown list. It is positioned below the display frame if there is enough
// room on the screen to display the entire list. Otherwise it is placed above the display
// frame.
// Note: As first glance, it appears that you could simply get the absolute bounding box for the
// dropdown list by first getting its view, then getting the view's nsIWidget, then asking the nsIWidget
// for it's AbsoluteBounds. The problem with this approach, is that the dropdown lists y location can
// change based on whether the dropdown is placed below or above the display frame.
// The approach, taken here is to get use the absolute position of the display frame and use it's location
// to determine if the dropdown will go offscreen.
// Use the height calculated for the area frame so it includes both
// the display and button heights.
nscoord dropdownYOffset = GetRect().height;
nsSize dropdownSize = mDropdownFrame->GetSize();
nsRect screen = nsFormControlFrame::GetUsableScreenRect(PresContext());
// Check to see if the drop-down list will go offscreen
if (GetScreenRectInAppUnits().YMost() + dropdownSize.height > screen.YMost()) {
// move the dropdown list up
dropdownYOffset = - (dropdownSize.height);
}
nsPoint dropdownPosition;
const nsStyleVisibility* vis = GetStyleVisibility();
if (vis->mDirection == NS_STYLE_DIRECTION_RTL) {
// Align the right edge of the drop-down with the right edge of the control.
dropdownPosition.x = GetRect().width - dropdownSize.width;
} else {
dropdownPosition.x = 0;
}
dropdownPosition.y = dropdownYOffset;
mDropdownFrame->SetPosition(dropdownPosition);
}
//----------------------------------------------------------
//
//----------------------------------------------------------
#ifdef DO_REFLOW_DEBUG
static int myCounter = 0;
static void printSize(char * aDesc, nscoord aSize)
{
printf(" %s: ", aDesc);
if (aSize == NS_UNCONSTRAINEDSIZE) {
printf("UC");
} else {
printf("%d", PX(aSize));
}
}
#endif
//-------------------------------------------------------------------
//-- Main Reflow for the Combobox
//-------------------------------------------------------------------
nscoord
nsComboboxControlFrame::GetIntrinsicWidth(nsRenderingContext* aRenderingContext,
nsLayoutUtils::IntrinsicWidthType aType)
{
// get the scrollbar width, we'll use this later
nscoord scrollbarWidth = 0;
nsPresContext* presContext = PresContext();
if (mListControlFrame) {
nsIScrollableFrame* scrollable = do_QueryFrame(mListControlFrame);
NS_ASSERTION(scrollable, "List must be a scrollable frame");
scrollbarWidth =
scrollable->GetDesiredScrollbarSizes(presContext, aRenderingContext).LeftRight();
}
nscoord displayWidth = 0;
if (NS_LIKELY(mDisplayFrame)) {
displayWidth = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
mDisplayFrame,
aType);
}
if (mDropdownFrame) {
nscoord dropdownContentWidth;
if (aType == nsLayoutUtils::MIN_WIDTH) {
dropdownContentWidth = mDropdownFrame->GetMinWidth(aRenderingContext);
} else {
NS_ASSERTION(aType == nsLayoutUtils::PREF_WIDTH, "Unexpected type");
dropdownContentWidth = mDropdownFrame->GetPrefWidth(aRenderingContext);
}
dropdownContentWidth = NSCoordSaturatingSubtract(dropdownContentWidth,
scrollbarWidth,
nscoord_MAX);
displayWidth = NS_MAX(dropdownContentWidth, displayWidth);
}
// add room for the dropmarker button if there is one
if (!IsThemed() || presContext->GetTheme()->ThemeNeedsComboboxDropmarker())
displayWidth += scrollbarWidth;
return displayWidth;
}
nscoord
nsComboboxControlFrame::GetMinWidth(nsRenderingContext *aRenderingContext)
{
nscoord minWidth;
DISPLAY_MIN_WIDTH(this, minWidth);
minWidth = GetIntrinsicWidth(aRenderingContext, nsLayoutUtils::MIN_WIDTH);
return minWidth;
}
nscoord
nsComboboxControlFrame::GetPrefWidth(nsRenderingContext *aRenderingContext)
{
nscoord prefWidth;
DISPLAY_PREF_WIDTH(this, prefWidth);
prefWidth = GetIntrinsicWidth(aRenderingContext, nsLayoutUtils::PREF_WIDTH);
return prefWidth;
}
NS_IMETHODIMP
nsComboboxControlFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
// Constraints we try to satisfy:
// 1) Default width of button is the vertical scrollbar size
// 2) If the width of button is bigger than our width, set width of
// button to 0.
// 3) Default height of button is height of display area
// 4) Width of display area is whatever is left over from our width after
// allocating width for the button.
// 5) Height of display area is GetHeightOfARow() on the
// mListControlFrame.
if (!mDisplayFrame || !mButtonFrame || !mDropdownFrame) {
NS_ERROR("Why did the frame constructor allow this to happen? Fix it!!");
return NS_ERROR_UNEXPECTED;
}
// Make sure the displayed text is the same as the selected option, bug 297389.
PRInt32 selectedIndex;
nsAutoString selectedOptionText;
if (!mDroppedDown) {
selectedIndex = mListControlFrame->GetSelectedIndex();
}
else {
// In dropped down mode the "selected index" is the hovered menu item,
// we want the last selected item which is |mDisplayedIndex| in this case.
selectedIndex = mDisplayedIndex;
}
if (selectedIndex != -1) {
mListControlFrame->GetOptionText(selectedIndex, selectedOptionText);
}
if (mDisplayedOptionText != selectedOptionText) {
RedisplayText(selectedIndex);
}
// First reflow our dropdown so that we know how tall we should be.
ReflowDropdown(aPresContext, aReflowState);
// Get the width of the vertical scrollbar. That will be the width of the
// dropdown button.
nscoord buttonWidth;
const nsStyleDisplay *disp = GetStyleDisplay();
if (IsThemed(disp) && !aPresContext->GetTheme()->ThemeNeedsComboboxDropmarker()) {
buttonWidth = 0;
}
else {
nsIScrollableFrame* scrollable = do_QueryFrame(mListControlFrame);
NS_ASSERTION(scrollable, "List must be a scrollable frame");
buttonWidth =
scrollable->GetDesiredScrollbarSizes(PresContext(),
aReflowState.rendContext).LeftRight();
if (buttonWidth > aReflowState.ComputedWidth()) {
buttonWidth = 0;
}
}
mDisplayWidth = aReflowState.ComputedWidth() - buttonWidth;
nsresult rv = nsBlockFrame::Reflow(aPresContext, aDesiredSize, aReflowState,
aStatus);
NS_ENSURE_SUCCESS(rv, rv);
// Now set the correct width and height on our button. The width we need to
// set always, the height only if we had an auto height.
nsRect buttonRect = mButtonFrame->GetRect();
// If we have a non-intrinsic computed height, our kids should have sized
// themselves properly on their own.
if (aReflowState.ComputedHeight() == NS_INTRINSICSIZE) {
// The display frame is going to be the right height and width at this
// point. Use its height as the button height.
nsRect displayRect = mDisplayFrame->GetRect();
buttonRect.height = displayRect.height;
buttonRect.y = displayRect.y;
}
#ifdef DEBUG
else {
nscoord buttonHeight = mButtonFrame->GetSize().height;
nscoord displayHeight = mDisplayFrame->GetSize().height;
// The button and display area should be equal heights, unless the computed
// height on the combobox is too small to fit their borders and padding.
NS_ASSERTION(buttonHeight == displayHeight ||
(aReflowState.ComputedHeight() < buttonHeight &&
buttonHeight ==
mButtonFrame->GetUsedBorderAndPadding().TopBottom()) ||
(aReflowState.ComputedHeight() < displayHeight &&
displayHeight ==
mDisplayFrame->GetUsedBorderAndPadding().TopBottom()),
"Different heights?");
}
#endif
if (GetStyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
// Make sure the right edge of the button frame stays where it is now
buttonRect.x -= buttonWidth - buttonRect.width;
}
buttonRect.width = buttonWidth;
mButtonFrame->SetRect(buttonRect);
return rv;
}
//--------------------------------------------------------------
nsIAtom*
nsComboboxControlFrame::GetType() const
{
return nsGkAtoms::comboboxControlFrame;
}
#ifdef NS_DEBUG
NS_IMETHODIMP
nsComboboxControlFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("ComboboxControl"), aResult);
}
#endif
//----------------------------------------------------------------------
// nsIComboboxControlFrame
//----------------------------------------------------------------------
void
nsComboboxControlFrame::ShowDropDown(PRBool aDoDropDown)
{
nsEventStates eventStates = mContent->IntrinsicState();
if (eventStates.HasState(NS_EVENT_STATE_DISABLED)) {
return;
}
if (!mDroppedDown && aDoDropDown) {
if (mListControlFrame) {
mListControlFrame->SyncViewWithFrame();
}
ShowList(aDoDropDown); // might destroy us
} else if (mDroppedDown && !aDoDropDown) {
ShowList(aDoDropDown); // might destroy us
}
}
void
nsComboboxControlFrame::SetDropDown(nsIFrame* aDropDownFrame)
{
mDropdownFrame = aDropDownFrame;
mListControlFrame = do_QueryFrame(mDropdownFrame);
}
nsIFrame*
nsComboboxControlFrame::GetDropDown()
{
return mDropdownFrame;
}
///////////////////////////////////////////////////////////////
NS_IMETHODIMP
nsComboboxControlFrame::RedisplaySelectedText()
{
nsAutoScriptBlocker scriptBlocker;
return RedisplayText(mListControlFrame->GetSelectedIndex());
}
nsresult
nsComboboxControlFrame::RedisplayText(PRInt32 aIndex)
{
// Get the text to display
if (aIndex != -1) {
mListControlFrame->GetOptionText(aIndex, mDisplayedOptionText);
} else {
mDisplayedOptionText.Truncate();
}
mDisplayedIndex = aIndex;
REFLOW_DEBUG_MSG2("RedisplayText \"%s\"\n",
NS_LossyConvertUTF16toASCII(mDisplayedOptionText).get());
// Send reflow command because the new text maybe larger
nsresult rv = NS_OK;
if (mDisplayContent) {
// Don't call ActuallyDisplayText(PR_TRUE) directly here since that
// could cause recursive frame construction. See bug 283117 and the comment in
// HandleRedisplayTextEvent() below.
// Revoke outstanding events to avoid out-of-order events which could mean
// displaying the wrong text.
mRedisplayTextEvent.Revoke();
NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
"If we happen to run our redisplay event now, we might kill "
"ourselves!");
nsRefPtr<RedisplayTextEvent> event = new RedisplayTextEvent(this);
mRedisplayTextEvent = event;
if (!nsContentUtils::AddScriptRunner(event))
mRedisplayTextEvent.Forget();
}
return rv;
}
void
nsComboboxControlFrame::HandleRedisplayTextEvent()
{
// First, make sure that the content model is up to date and we've
// constructed the frames for all our content in the right places.
// Otherwise they'll end up under the wrong insertion frame when we
// ActuallyDisplayText, since that flushes out the content sink by
// calling SetText on a DOM node with aNotify set to true. See bug
// 289730.
nsWeakFrame weakThis(this);
PresContext()->Document()->
FlushPendingNotifications(Flush_ContentAndNotify);
if (!weakThis.IsAlive())
return;
// Redirect frame insertions during this method (see GetContentInsertionFrame())
// so that any reframing that the frame constructor forces upon us is inserted
// into the correct parent (mDisplayFrame). See bug 282607.
NS_PRECONDITION(!mInRedisplayText, "Nested RedisplayText");
mInRedisplayText = PR_TRUE;
mRedisplayTextEvent.Forget();
ActuallyDisplayText(PR_TRUE);
// XXXbz This should perhaps be eResize. Check.
PresContext()->PresShell()->FrameNeedsReflow(mDisplayFrame,
nsIPresShell::eStyleChange,
NS_FRAME_IS_DIRTY);
mInRedisplayText = PR_FALSE;
}
void
nsComboboxControlFrame::ActuallyDisplayText(PRBool aNotify)
{
if (mDisplayedOptionText.IsEmpty()) {
// Have to use a non-breaking space for line-height calculations
// to be right
static const PRUnichar space = 0xA0;
mDisplayContent->SetText(&space, 1, aNotify);
} else {
mDisplayContent->SetText(mDisplayedOptionText, aNotify);
}
}
PRInt32
nsComboboxControlFrame::GetIndexOfDisplayArea()
{
return mDisplayedIndex;
}
//----------------------------------------------------------------------
// nsISelectControlFrame
//----------------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::DoneAddingChildren(PRBool aIsDone)
{
nsISelectControlFrame* listFrame = do_QueryFrame(mDropdownFrame);
if (!listFrame)
return NS_ERROR_FAILURE;
return listFrame->DoneAddingChildren(aIsDone);
}
NS_IMETHODIMP
nsComboboxControlFrame::AddOption(PRInt32 aIndex)
{
if (aIndex <= mDisplayedIndex) {
++mDisplayedIndex;
}
nsListControlFrame* lcf = static_cast<nsListControlFrame*>(mDropdownFrame);
return lcf->AddOption(aIndex);
}
NS_IMETHODIMP
nsComboboxControlFrame::RemoveOption(PRInt32 aIndex)
{
nsWeakFrame weakThis(this);
if (mListControlFrame->GetNumberOfOptions() > 0) {
if (aIndex < mDisplayedIndex) {
--mDisplayedIndex;
} else if (aIndex == mDisplayedIndex) {
mDisplayedIndex = 0; // IE6 compat
RedisplayText(mDisplayedIndex);
}
}
else {
// If we removed the last option, we need to blank things out
RedisplayText(-1);
}
if (!weakThis.IsAlive())
return NS_OK;
nsListControlFrame* lcf = static_cast<nsListControlFrame*>(mDropdownFrame);
return lcf->RemoveOption(aIndex);
}
NS_IMETHODIMP
nsComboboxControlFrame::OnSetSelectedIndex(PRInt32 aOldIndex, PRInt32 aNewIndex)
{
nsAutoScriptBlocker scriptBlocker;
RedisplayText(aNewIndex);
NS_ASSERTION(mDropdownFrame, "No dropdown frame!");
nsISelectControlFrame* listFrame = do_QueryFrame(mDropdownFrame);
NS_ASSERTION(listFrame, "No list frame!");
return listFrame->OnSetSelectedIndex(aOldIndex, aNewIndex);
}
// End nsISelectControlFrame
//----------------------------------------------------------------------
NS_IMETHODIMP
nsComboboxControlFrame::HandleEvent(nsPresContext* aPresContext,
nsGUIEvent* aEvent,
nsEventStatus* aEventStatus)
{
NS_ENSURE_ARG_POINTER(aEventStatus);
if (nsEventStatus_eConsumeNoDefault == *aEventStatus) {
return NS_OK;
}
nsEventStates eventStates = mContent->IntrinsicState();
if (eventStates.HasState(NS_EVENT_STATE_DISABLED)) {
return NS_OK;
}
// If we have style that affects how we are selected, feed event down to
// nsFrame::HandleEvent so that selection takes place when appropriate.
const nsStyleUserInterface* uiStyle = GetStyleUserInterface();
if (uiStyle->mUserInput == NS_STYLE_USER_INPUT_NONE || uiStyle->mUserInput == NS_STYLE_USER_INPUT_DISABLED)
return nsBlockFrame::HandleEvent(aPresContext, aEvent, aEventStatus);
return NS_OK;
}
nsresult
nsComboboxControlFrame::SetFormProperty(nsIAtom* aName, const nsAString& aValue)
{
nsIFormControlFrame* fcFrame = do_QueryFrame(mDropdownFrame);
if (!fcFrame) {
return NS_NOINTERFACE;
}
return fcFrame->SetFormProperty(aName, aValue);
}
nsresult
nsComboboxControlFrame::GetFormProperty(nsIAtom* aName, nsAString& aValue) const
{
nsIFormControlFrame* fcFrame = do_QueryFrame(mDropdownFrame);
if (!fcFrame) {
return NS_ERROR_FAILURE;
}
return fcFrame->GetFormProperty(aName, aValue);
}
nsIFrame*
nsComboboxControlFrame::GetContentInsertionFrame() {
return mInRedisplayText ? mDisplayFrame : mDropdownFrame->GetContentInsertionFrame();
}
nsresult
nsComboboxControlFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
{
// The frames used to display the combo box and the button used to popup the dropdown list
// are created through anonymous content. The dropdown list is not created through anonymous
// content because it's frame is initialized specifically for the drop-down case and it is placed
// a special list referenced through NS_COMBO_FRAME_POPUP_LIST_INDEX to keep separate from the
// layout of the display and button.