summaryrefslogtreecommitdiffstats
path: root/src/widgets/inputmethod/qwininputcontext_win.cpp
blob: 9ec9942af8254c4870c376afc1b9e03df66bb7eb (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
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qwininputcontext_p.h"
#include "qinputcontext_p.h"

#include "qfont.h"
#include "qwidget.h"
#include "qapplication.h"
#include "qevent.h"
#include "qtextformat.h"
#include "qtextboundaryfinder.h"

//#define Q_IME_DEBUG

#ifdef Q_IME_DEBUG
#include "qdebug.h"
#endif

#if defined(Q_WS_WINCE)
extern void qt_wince_show_SIP(bool show);   // defined in qguifunctions_wince.cpp
#endif

QT_BEGIN_NAMESPACE

extern bool qt_sendSpontaneousEvent(QObject*, QEvent*);


DEFINE_GUID(IID_IActiveIMMApp,
0x08c0e040, 0x62d1, 0x11d1, 0x93, 0x26, 0x0, 0x60, 0xb0, 0x67, 0xb8, 0x6e);



DEFINE_GUID(CLSID_CActiveIMM,
0x4955DD33, 0xB159, 0x11d0, 0x8F, 0xCF, 0x0, 0xAA, 0x00, 0x6B, 0xCC, 0x59);



DEFINE_GUID(IID_IActiveIMMMessagePumpOwner,
0xb5cf2cfa, 0x8aeb, 0x11d1, 0x93, 0x64, 0x0, 0x60, 0xb0, 0x67, 0xb8, 0x6e);



interface IEnumRegisterWordW;
interface IEnumInputContext;


bool qt_sendSpontaneousEvent(QObject*, QEvent*);


#define IFMETHOD HRESULT STDMETHODCALLTYPE

interface IActiveIMMApp : public IUnknown
{
public:
    virtual IFMETHOD AssociateContext(HWND hWnd, HIMC hIME, HIMC __RPC_FAR *phPrev) = 0;
    virtual IFMETHOD dummy_ConfigureIMEA() = 0;
    virtual IFMETHOD ConfigureIMEW(HKL hKL, HWND hWnd, DWORD dwMode, REGISTERWORDW __RPC_FAR *pData) = 0;
    virtual IFMETHOD CreateContext(HIMC __RPC_FAR *phIMC) = 0;
    virtual IFMETHOD DestroyContext(HIMC hIME) = 0;
    virtual IFMETHOD dummy_EnumRegisterWordA() = 0;
    virtual IFMETHOD EnumRegisterWordW(HKL hKL, LPWSTR szReading, DWORD dwStyle, LPWSTR szRegister, LPVOID pData,
        IEnumRegisterWordW __RPC_FAR *__RPC_FAR *pEnum) = 0;
    virtual IFMETHOD dummy_EscapeA() = 0;
    virtual IFMETHOD EscapeW(HKL hKL, HIMC hIMC, UINT uEscape, LPVOID pData, LRESULT __RPC_FAR *plResult) = 0;
    virtual IFMETHOD dummy_GetCandidateListA() = 0;
    virtual IFMETHOD GetCandidateListW(HIMC hIMC, DWORD dwIndex, UINT uBufLen, CANDIDATELIST __RPC_FAR *pCandList,
        UINT __RPC_FAR *puCopied) = 0;
    virtual IFMETHOD dummy_GetCandidateListCountA() = 0;
    virtual IFMETHOD GetCandidateListCountW(HIMC hIMC, DWORD __RPC_FAR *pdwListSize, DWORD __RPC_FAR *pdwBufLen) = 0;
    virtual IFMETHOD GetCandidateWindow(HIMC hIMC, DWORD dwIndex, CANDIDATEFORM __RPC_FAR *pCandidate) = 0;
    virtual IFMETHOD dummy_GetCompositionFontA() = 0;
    virtual IFMETHOD GetCompositionFontW(HIMC hIMC, LOGFONTW __RPC_FAR *plf) = 0;
    virtual IFMETHOD dummy_GetCompositionStringA() = 0;
    virtual IFMETHOD GetCompositionStringW(HIMC hIMC, DWORD dwIndex, DWORD dwBufLen, LONG __RPC_FAR *plCopied, LPVOID pBuf) = 0;
    virtual IFMETHOD GetCompositionWindow(HIMC hIMC, COMPOSITIONFORM __RPC_FAR *pCompForm) = 0;
    virtual IFMETHOD GetContext(HWND hWnd, HIMC __RPC_FAR *phIMC) = 0;
    virtual IFMETHOD dummy_GetConversionListA() = 0;
    virtual IFMETHOD GetConversionListW(HKL hKL, HIMC hIMC, LPWSTR pSrc, UINT uBufLen, UINT uFlag,
        CANDIDATELIST __RPC_FAR *pDst, UINT __RPC_FAR *puCopied) = 0;
    virtual IFMETHOD GetConversionStatus(HIMC hIMC, DWORD __RPC_FAR *pfdwConversion, DWORD __RPC_FAR *pfdwSentence) = 0;
    virtual IFMETHOD GetDefaultIMEWnd(HWND hWnd, HWND __RPC_FAR *phDefWnd) = 0;
    virtual IFMETHOD dummy_GetDescriptionA() = 0;
    virtual IFMETHOD GetDescriptionW(HKL hKL, UINT uBufLen, LPWSTR szDescription, UINT __RPC_FAR *puCopied) = 0;
    virtual IFMETHOD dummy_GetGuideLineA() = 0;
    virtual IFMETHOD GetGuideLineW(HIMC hIMC, DWORD dwIndex, DWORD dwBufLen, LPWSTR pBuf, DWORD __RPC_FAR *pdwResult) = 0;
    virtual IFMETHOD dummy_GetIMEFileNameA() = 0;
    virtual IFMETHOD GetIMEFileNameW(HKL hKL, UINT uBufLen, LPWSTR szFileName, UINT __RPC_FAR *puCopied) = 0;
    virtual IFMETHOD GetOpenStatus(HIMC hIMC) = 0;
    virtual IFMETHOD GetProperty(HKL hKL, DWORD fdwIndex, DWORD __RPC_FAR *pdwProperty) = 0;
    virtual IFMETHOD dummy_GetRegisterWordStyleA() = 0;
    virtual IFMETHOD GetRegisterWordStyleW(HKL hKL, UINT nItem, STYLEBUFW __RPC_FAR *pStyleBuf, UINT __RPC_FAR *puCopied) = 0;
    virtual IFMETHOD GetStatusWindowPos(HIMC hIMC, POINT __RPC_FAR *pptPos) = 0;
    virtual IFMETHOD GetVirtualKey(HWND hWnd, UINT __RPC_FAR *puVirtualKey) = 0;
    virtual IFMETHOD dummy_InstallIMEA() = 0;
    virtual IFMETHOD InstallIMEW(LPWSTR szIMEFileName, LPWSTR szLayoutText, HKL __RPC_FAR *phKL) = 0;
    virtual IFMETHOD IsIME(HKL hKL) = 0;
    virtual IFMETHOD dummy_IsUIMessageA() = 0;
    virtual IFMETHOD IsUIMessageW(HWND hWndIME, UINT msg, WPARAM wParam, LPARAM lParam) = 0;
    virtual IFMETHOD NotifyIME(HIMC hIMC, DWORD dwAction, DWORD dwIndex, DWORD dwValue) = 0;
    virtual IFMETHOD dummy_RegisterWordA() = 0;
    virtual IFMETHOD RegisterWordW(HKL hKL, LPWSTR szReading, DWORD dwStyle, LPWSTR szRegister) = 0;
    virtual IFMETHOD ReleaseContext(HWND hWnd, HIMC hIMC) = 0;
    virtual IFMETHOD SetCandidateWindow(HIMC hIMC, CANDIDATEFORM __RPC_FAR *pCandidate) = 0;
    virtual IFMETHOD SetCompositionFontA(HIMC hIMC, LOGFONTA __RPC_FAR *plf) = 0;
    virtual IFMETHOD SetCompositionFontW(HIMC hIMC, LOGFONTW __RPC_FAR *plf) = 0;
    virtual IFMETHOD dummy_SetCompositionStringA() = 0;
    virtual IFMETHOD SetCompositionStringW(HIMC hIMC, DWORD dwIndex, LPVOID pComp, DWORD dwCompLen,
        LPVOID pRead, DWORD dwReadLen) = 0;
    virtual IFMETHOD SetCompositionWindow(HIMC hIMC, COMPOSITIONFORM __RPC_FAR *pCompForm) = 0;
    virtual IFMETHOD SetConversionStatus(HIMC hIMC, DWORD fdwConversion, DWORD fdwSentence) = 0;
    virtual IFMETHOD SetOpenStatus(HIMC hIMC, BOOL fOpen) = 0;
    virtual IFMETHOD SetStatusWindowPos(HIMC hIMC, POINT __RPC_FAR *pptPos) = 0;
    virtual IFMETHOD SimulateHotKey(HWND hWnd, DWORD dwHotKeyID) = 0;
    virtual IFMETHOD dummy_UnregisterWordA() = 0;
    virtual IFMETHOD UnregisterWordW(HKL hKL, LPWSTR szReading, DWORD dwStyle, LPWSTR szUnregister) = 0;
    virtual IFMETHOD Activate(BOOL fRestoreLayout) = 0;
    virtual IFMETHOD Deactivate(void) = 0;
    virtual IFMETHOD OnDefWindowProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam, LRESULT __RPC_FAR *plResult) = 0;
    virtual IFMETHOD FilterClientWindows(ATOM __RPC_FAR *aaClassList, UINT uSize) = 0;
    virtual IFMETHOD dummy_GetCodePageA() = 0;
    virtual IFMETHOD GetLangId(HKL hKL, LANGID __RPC_FAR *plid) = 0;
    virtual IFMETHOD AssociateContextEx(HWND hWnd, HIMC hIMC, DWORD dwFlags) = 0;
    virtual IFMETHOD DisableIME(DWORD idThread) = 0;
    virtual IFMETHOD dummy_GetImeMenuItemsA() = 0;
    virtual IFMETHOD GetImeMenuItemsW(HIMC hIMC, DWORD dwFlags, DWORD dwType, /*IMEMENUITEMINFOW*/ void __RPC_FAR *pImeParentMenu,
        /*IMEMENUITEMINFOW*/ void __RPC_FAR *pImeMenu, DWORD dwSize, DWORD __RPC_FAR *pdwResult) = 0;
    virtual IFMETHOD EnumInputContext(DWORD idThread, IEnumInputContext __RPC_FAR *__RPC_FAR *ppEnum) = 0;
};

interface IActiveIMMMessagePumpOwner : public IUnknown
{
public:
    virtual IFMETHOD Start(void) = 0;
    virtual IFMETHOD End(void) = 0;
    virtual IFMETHOD OnTranslateMessage(const MSG __RPC_FAR *pMsg) = 0;
    virtual IFMETHOD Pause(DWORD __RPC_FAR *pdwCookie) = 0;
    virtual IFMETHOD Resume(DWORD dwCookie) = 0;
};


static IActiveIMMApp *aimm = 0;
static IActiveIMMMessagePumpOwner *aimmpump = 0;
static QString *imeComposition = 0;
static int        imePosition    = -1;
bool qt_use_rtl_extensions = false;
static bool haveCaret = false;

#ifndef LGRPID_INSTALLED
#define LGRPID_INSTALLED          0x00000001  // installed language group ids
#define LGRPID_SUPPORTED          0x00000002  // supported language group ids
#endif

#ifndef LGRPID_ARABIC
#define LGRPID_WESTERN_EUROPE        0x0001   // Western Europe & U.S.
#define LGRPID_CENTRAL_EUROPE        0x0002   // Central Europe
#define LGRPID_BALTIC                0x0003   // Baltic
#define LGRPID_GREEK                 0x0004   // Greek
#define LGRPID_CYRILLIC              0x0005   // Cyrillic
#define LGRPID_TURKISH               0x0006   // Turkish
#define LGRPID_JAPANESE              0x0007   // Japanese
#define LGRPID_KOREAN                0x0008   // Korean
#define LGRPID_TRADITIONAL_CHINESE   0x0009   // Traditional Chinese
#define LGRPID_SIMPLIFIED_CHINESE    0x000a   // Simplified Chinese
#define LGRPID_THAI                  0x000b   // Thai
#define LGRPID_HEBREW                0x000c   // Hebrew
#define LGRPID_ARABIC                0x000d   // Arabic
#define LGRPID_VIETNAMESE            0x000e   // Vietnamese
#define LGRPID_INDIC                 0x000f   // Indic
#define LGRPID_GEORGIAN              0x0010   // Georgian
#define LGRPID_ARMENIAN              0x0011   // Armenian
#endif

static DWORD WM_MSIME_MOUSE = 0;

QWinInputContext::QWinInputContext(QObject *parent)
    : QInputContext(parent), recursionGuard(false)
{
#ifndef Q_WS_WINCE
    QSysInfo::WinVersion ver = QSysInfo::windowsVersion();
    if (ver & QSysInfo::WV_NT_based  && ver >= QSysInfo::WV_VISTA) {
        // Since the IsValidLanguageGroup/IsValidLocale functions always return true on 
        // Vista, check the Keyboard Layouts for enabling RTL. 
        UINT nLayouts = GetKeyboardLayoutList(0, 0);
        if (nLayouts) {
            HKL *lpList = new HKL[nLayouts];
            GetKeyboardLayoutList(nLayouts, lpList);
            for (int i = 0; i<(int)nLayouts; i++) {
                WORD plangid = PRIMARYLANGID((quintptr)lpList[i]);
                if (plangid == LANG_ARABIC 
                    || plangid ==  LANG_HEBREW
                    || plangid ==  LANG_FARSI
#ifdef LANG_SYRIAC
                    || plangid ==  LANG_SYRIAC
#endif
                    ) {
                        qt_use_rtl_extensions = true;
                        break;
                }
            }
            delete []lpList;
        }
    } else {
        // figure out whether a RTL language is installed
        qt_use_rtl_extensions = IsValidLanguageGroup(LGRPID_ARABIC, LGRPID_INSTALLED)
                                || IsValidLanguageGroup(LGRPID_HEBREW, LGRPID_INSTALLED)
                                || IsValidLocale(MAKELCID(MAKELANGID(LANG_ARABIC, SUBLANG_DEFAULT), SORT_DEFAULT), LCID_INSTALLED)
                                || IsValidLocale(MAKELCID(MAKELANGID(LANG_HEBREW, SUBLANG_DEFAULT), SORT_DEFAULT), LCID_INSTALLED)
#ifdef LANG_SYRIAC
                                || IsValidLocale(MAKELCID(MAKELANGID(LANG_SYRIAC, SUBLANG_DEFAULT), SORT_DEFAULT), LCID_INSTALLED)
#endif
                                || IsValidLocale(MAKELCID(MAKELANGID(LANG_FARSI, SUBLANG_DEFAULT), SORT_DEFAULT), LCID_INSTALLED);
    }
#else
    qt_use_rtl_extensions = false;
#endif

    WM_MSIME_MOUSE = RegisterWindowMessage(L"MSIMEMouseOperation");
}

QWinInputContext::~QWinInputContext()
{
    // release active input method if we have one
    if (aimm) {
        aimmpump->End();
        aimmpump->Release();
        aimm->Deactivate();
        aimm->Release();
        aimm = 0;
        aimmpump = 0;
    }
    delete imeComposition;
    imeComposition = 0;
}

static HWND getDefaultIMEWnd(HWND wnd)
{
    HWND ime_wnd;
    if(aimm)
        aimm->GetDefaultIMEWnd(wnd, &ime_wnd);
    else
        ime_wnd = ImmGetDefaultIMEWnd(wnd);
    return ime_wnd;
}

static HIMC getContext(HWND wnd)
{
    HIMC imc;
    if (aimm)
        aimm->GetContext(wnd, &imc);
    else
        imc = ImmGetContext(wnd);

    return imc;
}

static void releaseContext(HWND wnd, HIMC imc)
{
    if (aimm)
        aimm->ReleaseContext(wnd, imc);
    else
        ImmReleaseContext(wnd, imc);
}

static void notifyIME(HIMC imc, DWORD dwAction, DWORD dwIndex, DWORD dwValue)
{
    if (!imc)
        return;
    if (aimm)
        aimm->NotifyIME(imc, dwAction, dwIndex, dwValue);
    else
        ImmNotifyIME(imc, dwAction, dwIndex, dwValue);
}

static LONG getCompositionString(HIMC himc, DWORD dwIndex, LPVOID lpbuf, DWORD dBufLen)
{
    LONG len = 0;
    if (aimm)
        aimm->GetCompositionStringW(himc, dwIndex, dBufLen, &len, lpbuf);
    else
        len = ImmGetCompositionString(himc, dwIndex, lpbuf, dBufLen);
    return len;
}

static int getCursorPosition(HIMC himc)
{
    return getCompositionString(himc, GCS_CURSORPOS, 0, 0);
}

static QString getString(HIMC himc, DWORD dwindex, int *selStart = 0, int *selLength = 0)
{
    const int bufferSize = 256;
    wchar_t buffer[bufferSize];
    int len = getCompositionString(himc, dwindex, buffer, bufferSize * sizeof(wchar_t));

    if (selStart) {
        char attrbuffer[bufferSize];
        int attrlen = getCompositionString(himc, GCS_COMPATTR, attrbuffer, bufferSize);
        *selStart = attrlen+1;
        *selLength = -1;
        for (int i = 0; i < attrlen; i++) {
            if (attrbuffer[i] & ATTR_TARGET_CONVERTED) {
                *selStart = qMin(*selStart, i);
                *selLength = qMax(*selLength, i);
            }
        }
        *selLength = qMax(0, *selLength - *selStart + 1);
    }

    if (len <= 0)
        return QString();

    return QString((QChar*)buffer, len / sizeof(QChar));
}

void QWinInputContext::TranslateMessage(const MSG *msg)
{
    if (!aimmpump || aimmpump->OnTranslateMessage(msg) != S_OK)
        ::TranslateMessage(msg);
}

LRESULT QWinInputContext::DefWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    LRESULT retval;
    if (!aimm || aimm->OnDefWindowProc(hwnd, msg, wParam, lParam, &retval) != S_OK)
    {
        retval = ::DefWindowProc(hwnd, msg, wParam, lParam);
    }
    return retval;
}


void QWinInputContext::update()
{
    QWidget *w = focusWidget();
    if(!w)
        return;

    Q_ASSERT(w->testAttribute(Qt::WA_WState_Created));
    HIMC imc = getContext(w->effectiveWinId());

    if (!imc)
        return;

    QFont f = qvariant_cast<QFont>(w->inputMethodQuery(Qt::ImFont));
    HFONT hf;
    hf = f.handle();

    LOGFONT lf;
    if (GetObject(hf, sizeof(lf), &lf)) {
        if (aimm)
            aimm->SetCompositionFontW(imc, &lf);
        else
            ImmSetCompositionFont(imc, &lf);
    }

    QRect r = w->inputMethodQuery(Qt::ImMicroFocus).toRect();

    // The ime window positions are based on the WinId with active focus.
    QWidget *imeWnd = QWidget::find(::GetFocus());
    if (imeWnd && !aimm) {
        QPoint pt (r.topLeft());
        pt = w->mapToGlobal(pt);
        pt = imeWnd->mapFromGlobal(pt);
        r.moveTo(pt);
    }

    COMPOSITIONFORM cf;
    // ### need X-like inputStyle config settings
    cf.dwStyle = CFS_FORCE_POSITION;
    cf.ptCurrentPos.x = r.x();
    cf.ptCurrentPos.y = r.y();

    CANDIDATEFORM candf;
    candf.dwIndex = 0;
    candf.dwStyle = CFS_EXCLUDE;
    candf.ptCurrentPos.x = r.x();
    candf.ptCurrentPos.y = r.y() + r.height();
    candf.rcArea.left = r.x();
    candf.rcArea.top = r.y();
    candf.rcArea.right = r.x() + r.width();
    candf.rcArea.bottom = r.y() + r.height();

    if(haveCaret)
        SetCaretPos(r.x(), r.y());

    if (aimm) {
        aimm->SetCompositionWindow(imc, &cf);
        aimm->SetCandidateWindow(imc, &candf);
    } else {
        ImmSetCompositionWindow(imc, &cf);
        ImmSetCandidateWindow(imc, &candf);
    }

    releaseContext(w->effectiveWinId(), imc);
}


bool QWinInputContext::endComposition()
{
    QWidget *fw = focusWidget();
#ifdef Q_IME_DEBUG
    qDebug("endComposition! fw = %s", fw ? fw->className() : "(null)");
#endif
    bool result = true;
    if(imePosition == -1 || recursionGuard)
        return result;

    // Googles Pinyin Input Method likes to call endComposition again
    // when we call notifyIME with CPS_CANCEL, so protect ourselves
    // against that.
    recursionGuard = true;

    if (fw) {
        Q_ASSERT(fw->testAttribute(Qt::WA_WState_Created));
        HIMC imc = getContext(fw->effectiveWinId());
        notifyIME(imc, NI_COMPOSITIONSTR, CPS_CANCEL, 0);
        releaseContext(fw->effectiveWinId(), imc);
        if(haveCaret) {
            DestroyCaret();
            haveCaret = false;
        }
    }

    if (!fw)
        fw = QApplication::focusWidget();

    if (fw) {
        QInputMethodEvent e;
        result = qt_sendSpontaneousEvent(fw, &e);
    }

    if (imeComposition)
        imeComposition->clear();
    imePosition = -1;

    recursionGuard = false;

    return result;
}

void QWinInputContext::reset()
{
    QWidget *fw = focusWidget();

#ifdef Q_IME_DEBUG
    qDebug("sending accept to focus widget %s", fw ? fw->className() : "(null)");
#endif

    if (fw && imePosition != -1) {
        QInputMethodEvent e;
        if (imeComposition)
            e.setCommitString(*imeComposition);
         imePosition = -1;
         qt_sendSpontaneousEvent(fw, &e);
    }

    if (imeComposition)
        imeComposition->clear();
    imePosition = -1;

    if (fw) {
        Q_ASSERT(fw->testAttribute(Qt::WA_WState_Created));
        HIMC imc = getContext(fw->effectiveWinId());
        notifyIME(imc, NI_COMPOSITIONSTR, CPS_CANCEL, 0);
        releaseContext(fw->effectiveWinId(), imc);
    }

}


bool QWinInputContext::startComposition()
{
#ifdef Q_IME_DEBUG
    qDebug("startComposition");
#endif

    if (!imeComposition)
        imeComposition = new QString();

    QWidget *fw = focusWidget();
    if (fw) {
        Q_ASSERT(fw->testAttribute(Qt::WA_WState_Created));
        imePosition = 0;
        haveCaret = CreateCaret(fw->effectiveWinId(), 0, 1, 1);
        HideCaret(fw->effectiveWinId());
        update();
    }
    return fw != 0;
}

enum StandardFormat {
    PreeditFormat,
    SelectionFormat
};

bool QWinInputContext::composition(LPARAM lParam)
{
#ifdef Q_IME_DEBUG
    QString str;
    if (lParam & GCS_RESULTSTR)
        str += "RESULTSTR ";
    if (lParam & GCS_COMPSTR)
        str += "COMPSTR ";
    if (lParam & GCS_COMPATTR)
        str += "COMPATTR ";
    if (lParam & GCS_CURSORPOS)
        str += "CURSORPOS ";
    if (lParam & GCS_COMPCLAUSE)
        str += "COMPCLAUSE ";
    if (lParam & CS_INSERTCHAR)
       str += "INSERTCHAR ";
    if (lParam & CS_NOMOVECARET)
       str += "NOMOVECARET ";
    qDebug("composition, lParam=(%x) %s imePosition=%d", lParam, str.latin1(), imePosition);
#endif

    bool result = true;

    if(!lParam)
        // bogus event
        return true;

    QWidget *fw = QApplication::focusWidget();
    if (fw) {
        Q_ASSERT(fw->testAttribute(Qt::WA_WState_Created));
        HIMC imc = getContext(fw->effectiveWinId());
        QInputMethodEvent e;
        if (lParam & (GCS_COMPSTR | GCS_COMPATTR | GCS_CURSORPOS)) {
            if (imePosition == -1)
                // need to send a start event
                startComposition();

            // some intermediate composition result
            int selStart, selLength;
            *imeComposition = getString(imc, GCS_COMPSTR, &selStart, &selLength);
            imePosition = getCursorPosition(imc);
            if (lParam & CS_INSERTCHAR  && lParam & CS_NOMOVECARET) {
                // make korean work correctly. Hope this is correct for all IMEs
                selStart = 0;
                selLength = imeComposition->length();
            }
    	    if(selLength == 0)
                selStart = 0;

           QList<QInputMethodEvent::Attribute> attrs;
           if (selStart > 0)
               attrs << QInputMethodEvent::Attribute(QInputMethodEvent::TextFormat, 0, selStart,
                                            standardFormat(PreeditFormat));
           if (selLength)
               attrs << QInputMethodEvent::Attribute(QInputMethodEvent::TextFormat, selStart, selLength,
                                            standardFormat(SelectionFormat));
           if (selStart + selLength < imeComposition->length())
               attrs << QInputMethodEvent::Attribute(QInputMethodEvent::TextFormat, selStart + selLength,
                                            imeComposition->length() - selStart - selLength,
                                            standardFormat(PreeditFormat));
           if(imePosition >= 0)
               attrs << QInputMethodEvent::Attribute(QInputMethodEvent::Cursor, imePosition, selLength ? 0 : 1, QVariant());

           e = QInputMethodEvent(*imeComposition, attrs);
        }
        if (lParam & GCS_RESULTSTR) {
            if(imePosition == -1)
                startComposition();
            // a fixed result, return the converted string
            *imeComposition = getString(imc, GCS_RESULTSTR);
            imePosition = -1;
            e.setCommitString(*imeComposition);
            imeComposition->clear();
        }
        result = qt_sendSpontaneousEvent(fw, &e);
        update();
        releaseContext(fw->effectiveWinId(), imc);
    }
#ifdef Q_IME_DEBUG
    qDebug("imecomposition: cursor pos at %d, str=%x", imePosition, str[0].unicode());
#endif
    return result;
}

static HIMC defaultContext = 0;

// checks whether widget is a popup
inline bool isPopup(QWidget *w)
{
    if (w && (w->windowFlags() & Qt::Popup) == Qt::Popup)
        return true;
    else 
        return false;
}
// checks whether widget is in a popup
inline bool isInPopup(QWidget *w)
{
    if (w && (isPopup(w) ||  isPopup(w->window())))
        return true;
    else 
        return false;
}

// find the parent widget, which is a non popup toplevel
// this is valid only if the widget is/in a popup
inline QWidget *findParentforPopup(QWidget *w)
{
    QWidget *e = QWidget::find(w->effectiveWinId());
    // check if this or its parent is a popup
    while (isInPopup(e)) {
        e = e->window()->parentWidget();
        if (!e) 
            break;
        e = QWidget::find(e->effectiveWinId());
    }
    if (e)
        return e->window();
    else
        return 0;
}

// enables or disables the ime 
inline void enableIme(QWidget *w,  bool value) 
{
    if (value) {
        // enable ime
        if (defaultContext)
            ImmAssociateContext(w->effectiveWinId(), defaultContext);
#ifdef Q_WS_WINCE
        if (qApp->autoSipEnabled())
            qt_wince_show_SIP(true);
#endif
    } else {
        // disable ime
        HIMC oldimc = ImmAssociateContext(w->effectiveWinId(), 0);
        if (!defaultContext)
            defaultContext = oldimc;
#ifdef Q_WS_WINCE
        if (qApp->autoSipEnabled())
            qt_wince_show_SIP(false);
#endif
    }
}


void QWinInputContext::updateImeStatus(QWidget *w, bool hasFocus)
{
    if (!w)
        return;
    // It's always the proxy that carries the hints.
    QWidget *focusProxyWidget = w->focusProxy();
    if (!focusProxyWidget)
        focusProxyWidget = w;
    bool e = w->testAttribute(Qt::WA_InputMethodEnabled) && w->isEnabled()
            && !(focusProxyWidget->inputMethodHints() & (Qt::ImhExclusiveInputMask | Qt::ImhHiddenText));
    bool hasIme = e && hasFocus;
#ifdef Q_IME_DEBUG
    qDebug("%s HasFocus = %d hasIme = %d e = %d ", w->className(), hasFocus, hasIme, e);
#endif
    if (hasFocus || e) {
        if (isInPopup(w))
            QWinInputContext::enablePopupChild(w, hasIme);
        else
            QWinInputContext::enable(w, hasIme);
    }
}

void QWinInputContext::enablePopupChild(QWidget *w, bool e)
{
    if (aimm) {
        enable(w, e);
        return;
    }

    if (!w || !isInPopup(w))
        return;
#ifdef Q_IME_DEBUG
    qDebug("enablePopupChild: w=%s, enable = %s", w ? w->className() : "(null)" , e ? "true" : "false");
#endif
    QWidget *parent = findParentforPopup(w);
    if (parent) {
        // update ime status of the normal toplevel parent of the popup
        enableIme(parent, e);
    }
    QWidget *toplevel = w->window();
    if (toplevel) {
        // update ime status of the toplevel popup
        enableIme(toplevel, e);
    }
}

void QWinInputContext::enable(QWidget *w, bool e)
{
    if(w) {
#ifdef Q_IME_DEBUG
        qDebug("enable: w=%s, enable = %s", w ? w->className() : "(null)" , e ? "true" : "false");
#endif
        if (!w->testAttribute(Qt::WA_WState_Created))
            return;
        if(aimm) {
            HIMC oldimc;
            if (!e) {
                aimm->AssociateContext(w->effectiveWinId(), 0, &oldimc);
                if (!defaultContext)
                    defaultContext = oldimc;
            } else if (defaultContext) {
                aimm->AssociateContext(w->effectiveWinId(), defaultContext, &oldimc);
            }
        } else {
            // update ime status on the widget
            QWidget *p = QWidget::find(w->effectiveWinId());
            if (p)
                enableIme(p, e);
        }
    }
}

void QWinInputContext::setFocusWidget(QWidget *w)
{
    QWidget *oldFocus = focusWidget();
    if (oldFocus == w)
        return;
    if (w) {
        QWinInputContext::updateImeStatus(w, true);
    } else {
        if (oldFocus)
            QWinInputContext::updateImeStatus(oldFocus , false);
    }
    QInputContext::setFocusWidget(w);
    update();
}

bool QWinInputContext::isComposing() const
{
    return imeComposition && !imeComposition->isEmpty();
}

void QWinInputContext::mouseHandler(int pos, QMouseEvent *e)
{
    if(e->type() != QEvent::MouseButtonPress)
        return;

    if (pos < 0 || pos > imeComposition->length())
        reset();

    // Probably should pass the correct button, but it seems to work fine like this.
    DWORD button = MK_LBUTTON;

    QWidget *fw = focusWidget();
    if (fw) {
        Q_ASSERT(fw->testAttribute(Qt::WA_WState_Created));
        HIMC himc = getContext(fw->effectiveWinId());
        HWND ime_wnd = getDefaultIMEWnd(fw->effectiveWinId());
        SendMessage(ime_wnd, WM_MSIME_MOUSE, MAKELONG(MAKEWORD(button, pos == 0 ? 2 : 1), pos), (LPARAM)himc);
        releaseContext(fw->effectiveWinId(), himc);
    }
    //qDebug("mouseHandler: got value %d pos=%d", ret,pos);
}

QString QWinInputContext::language()
{
    return QString();
}

int QWinInputContext::reconvertString(RECONVERTSTRING *reconv)
{
    QWidget *w = focusWidget();
    if(!w)
        return -1;

    Q_ASSERT(w->testAttribute(Qt::WA_WState_Created));
    QString surroundingText = qvariant_cast<QString>(w->inputMethodQuery(Qt::ImSurroundingText));
    int memSize = sizeof(RECONVERTSTRING)+(surroundingText.length()+1)*sizeof(ushort);
    // If memory is not allocated, return the required size.
    if (!reconv) {
        if (surroundingText.isEmpty())
            return -1;
        else
            return memSize;
    }
    int pos = qvariant_cast<int>(w->inputMethodQuery(Qt::ImCursorPosition));
    // find the word in the surrounding text.
    QTextBoundaryFinder bounds(QTextBoundaryFinder::Word, surroundingText);
    bounds.setPosition(pos);
    if (bounds.isAtBoundary()) {
        if (QTextBoundaryFinder::EndWord == bounds.boundaryReasons())
            bounds.toPreviousBoundary();
    } else {
        bounds.toPreviousBoundary();
    }
    int startPos = bounds.position();
    bounds.toNextBoundary();
    int endPos = bounds.position();
    // select the text, this will be overwritten by following ime events.
    QList<QInputMethodEvent::Attribute> attrs;
    attrs << QInputMethodEvent::Attribute(QInputMethodEvent::Selection, startPos, endPos-startPos, QVariant());
    QInputMethodEvent e(QString(), attrs);
    qt_sendSpontaneousEvent(w, &e);

    reconv->dwSize = memSize;
    reconv->dwVersion = 0;

    reconv->dwStrLen = surroundingText.length();
    reconv->dwStrOffset = sizeof(RECONVERTSTRING);
    reconv->dwCompStrLen = endPos-startPos;
    reconv->dwCompStrOffset = startPos*sizeof(ushort);
    reconv->dwTargetStrLen = reconv->dwCompStrLen;
    reconv->dwTargetStrOffset = reconv->dwCompStrOffset;
    memcpy((char*)(reconv+1), surroundingText.utf16(), surroundingText.length()*sizeof(ushort));
    return memSize;
}

QT_END_NAMESPACE