summaryrefslogtreecommitdiff
path: root/sfx2/source/appl/sfxhelp.cxx
blob: 473103cf7e47390b1eab55126225d1347d01254e (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
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
 */

#include <sfx2/sfxhelp.hxx>

#include <set>
#include <algorithm>
#include <com/sun/star/uno/Reference.h>
#include <com/sun/star/frame/Desktop.hpp>
#include <com/sun/star/frame/UnknownModuleException.hpp>
#include <com/sun/star/frame/XFrame2.hpp>
#include <com/sun/star/lang/XComponent.hpp>
#include <comphelper/processfactory.hxx>
#include <com/sun/star/awt/XWindow.hpp>
#include <com/sun/star/awt/XTopWindow.hpp>
#include <com/sun/star/awt/PosSize.hpp>
#include <com/sun/star/util/URLTransformer.hpp>
#include <com/sun/star/util/XURLTransformer.hpp>
#include <com/sun/star/beans/XPropertySet.hpp>
#include <com/sun/star/frame/FrameSearchFlag.hpp>
#include <toolkit/helper/vclunohelper.hxx>
#include <com/sun/star/frame/ModuleManager.hpp>
#include <com/sun/star/system/SystemShellExecute.hpp>
#include <com/sun/star/system/SystemShellExecuteFlags.hpp>
#include <unotools/configmgr.hxx>
#include <unotools/configitem.hxx>
#include <svtools/helpopt.hxx>
#include <unotools/moduleoptions.hxx>
#include <tools/urlobj.hxx>
#include <ucbhelper/content.hxx>
#include <unotools/pathoptions.hxx>
#include <rtl/ustring.hxx>
#include <osl/process.h>
#include <osl/file.hxx>
#include <unotools/bootstrap.hxx>
#include <rtl/uri.hxx>
#include <vcl/commandinfoprovider.hxx>
#include <vcl/layout.hxx>
#include <svtools/ehdl.hxx>
#include <svtools/sfxecode.hxx>
#include <openuriexternally.hxx>

#include <comphelper/lok.hxx>
#include <LibreOfficeKit/LibreOfficeKitEnums.h>
#include <sfx2/viewsh.hxx>

#include "newhelp.hxx"
#include <sfx2/objsh.hxx>
#include <sfx2/docfac.hxx>
#include <sfx2/sfxresid.hxx>
#include <helper.hxx>
#include <sfx2/strings.hrc>
#include <sfx2/sfxuno.hxx>
#include <vcl/svapp.hxx>
#include <sfx2/frame.hxx>
#include <rtl/string.hxx>

using namespace ::com::sun::star::beans;
using namespace ::com::sun::star::frame;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::util;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::system;

class NoHelpErrorBox : public MessageDialog
{
public:
    explicit NoHelpErrorBox( vcl::Window* _pParent );

    virtual void    RequestHelp( const HelpEvent& rHEvt ) override;
};

NoHelpErrorBox::NoHelpErrorBox( vcl::Window* _pParent )
    : MessageDialog(_pParent, SfxResId(RID_STR_HLPFILENOTEXIST))
{
    // Error message: "No help available"
}

void NoHelpErrorBox::RequestHelp( const HelpEvent& )
{
    // do nothing, because no help available
}

static bool impl_hasHelpInstalled( const OUString &rLang );

/// Return the locale we prefer for displaying help
static OUString const & HelpLocaleString()
{
    if (comphelper::LibreOfficeKit::isActive())
        return comphelper::LibreOfficeKit::getLanguageTag().getBcp47();

    static OUString aLocaleStr;
    if (aLocaleStr.isEmpty())
    {
        const OUString aEnglish( "en"  );
        // detect installed locale
        aLocaleStr = utl::ConfigManager::getLocale();
        bool bOk = !aLocaleStr.isEmpty();
        if ( !bOk )
            aLocaleStr = aEnglish;
        else
        {
            OUString aBaseInstallPath;
            utl::Bootstrap::locateBaseInstallation(aBaseInstallPath);
            static const char szHelpPath[] = "/help/";

            OUString sHelpPath = aBaseInstallPath + szHelpPath + aLocaleStr;
            osl::DirectoryItem aDirItem;

            if (osl::DirectoryItem::get(sHelpPath, aDirItem) != osl::FileBase::E_None)
            {
                bOk = false;
                OUString sLang(aLocaleStr);
                sal_Int32 nSepPos = sLang.indexOf( '-' );
                if (nSepPos != -1)
                {
                    bOk = true;
                    sLang = sLang.copy( 0, nSepPos );
                    sHelpPath = aBaseInstallPath + szHelpPath + sLang;
                    if (osl::DirectoryItem::get(sHelpPath, aDirItem) != osl::FileBase::E_None)
                        bOk = false;
                }
            }
        }
        // if not OK, and not even English installed, we use online help, and
        // have to preserve the full locale name
        if ( !bOk && impl_hasHelpInstalled( aEnglish ) )
            aLocaleStr = aEnglish;
    }
    return aLocaleStr;
}

void AppendConfigToken( OUStringBuffer& rURL, bool bQuestionMark, const OUString &rLang )
{
    OUString aLocaleStr( rLang );
    if ( aLocaleStr.isEmpty() )
        aLocaleStr = HelpLocaleString();

    // query part exists?
    if ( bQuestionMark )
        // no, so start with '?'
        rURL.append('?');
    else
        // yes, so only append with '&'
        rURL.append('&');

    // set parameters
    rURL.append("Language=");
    rURL.append(aLocaleStr);
    rURL.append("&System=");
    rURL.append(SvtHelpOptions().GetSystem());
    rURL.append("&Version=");
    rURL.append(utl::ConfigManager::getProductVersion());
}

bool GetHelpAnchor_Impl( const OUString& _rURL, OUString& _rAnchor )
{
    bool bRet = false;
    OUString sAnchor;

    try
    {
        ::ucbhelper::Content aCnt( INetURLObject( _rURL ).GetMainURL( INetURLObject::DecodeMechanism::NONE ),
                             Reference< css::ucb::XCommandEnvironment >(),
                             comphelper::getProcessComponentContext() );
        if ( aCnt.getPropertyValue("AnchorName") >>= sAnchor )
        {

            if ( !sAnchor.isEmpty() )
            {
                _rAnchor = sAnchor;
                bRet = true;
            }
        }
        else
        {
            SAL_WARN( "sfx.appl", "Property 'AnchorName' is missing" );
        }
    }
    catch (const css::uno::Exception&)
    {
    }

    return bRet;
}

class SfxHelp_Impl
{
public:
    static OUString GetHelpText( const OUString& aCommandURL, const OUString& rModule );
};

OUString SfxHelp_Impl::GetHelpText( const OUString& aCommandURL, const OUString& rModule )
{
    // create help url
    OUStringBuffer aHelpURL( SfxHelp::CreateHelpURL( aCommandURL, rModule ) );
    // added 'active' parameter
    sal_Int32 nIndex = aHelpURL.lastIndexOf( '#' );
    if ( nIndex < 0 )
        nIndex = aHelpURL.getLength();
    aHelpURL.insert( nIndex, "&Active=true" );
    // load help string
    return SfxContentHelper::GetActiveHelpString( aHelpURL.makeStringAndClear() );
}

SfxHelp::SfxHelp() :
    bIsDebug( false )
{
    // read the environment variable "HELP_DEBUG"
    // if it's set, you will see debug output on active help
    OUString sHelpDebug;
    OUString sEnvVarName( "HELP_DEBUG"  );
    osl_getEnvironment( sEnvVarName.pData, &sHelpDebug.pData );
    bIsDebug = !sHelpDebug.isEmpty();
}

SfxHelp::~SfxHelp()
{
}

OUString getDefaultModule_Impl()
{
    OUString sDefaultModule;
    SvtModuleOptions aModOpt;
    if ( aModOpt.IsModuleInstalled( SvtModuleOptions::EModule::WRITER ) )
        sDefaultModule = "swriter";
    else if ( aModOpt.IsModuleInstalled( SvtModuleOptions::EModule::CALC ) )
        sDefaultModule = "scalc";
    else if ( aModOpt.IsModuleInstalled( SvtModuleOptions::EModule::IMPRESS ) )
        sDefaultModule = "simpress";
    else if ( aModOpt.IsModuleInstalled( SvtModuleOptions::EModule::DRAW ) )
        sDefaultModule = "sdraw";
    else if ( aModOpt.IsModuleInstalled( SvtModuleOptions::EModule::MATH ) )
        sDefaultModule = "smath";
    else if ( aModOpt.IsModuleInstalled( SvtModuleOptions::EModule::CHART ) )
        sDefaultModule = "schart";
    else if ( aModOpt.IsModuleInstalled( SvtModuleOptions::EModule::BASIC ) )
        sDefaultModule = "sbasic";
    else if ( aModOpt.IsModuleInstalled( SvtModuleOptions::EModule::DATABASE ) )
        sDefaultModule = "sdatabase";
    else
    {
        SAL_WARN( "sfx.appl", "getDefaultModule_Impl(): no module installed" );
    }
    return sDefaultModule;
}

OUString getCurrentModuleIdentifier_Impl()
{
    OUString sIdentifier;
    Reference < XComponentContext > xContext = ::comphelper::getProcessComponentContext();
    Reference < XModuleManager2 > xModuleManager = ModuleManager::create(xContext);
    Reference < XDesktop2 > xDesktop = Desktop::create(xContext);
    Reference < XFrame > xCurrentFrame = xDesktop->getCurrentFrame();

    if ( xCurrentFrame.is() )
    {
        try
        {
            sIdentifier = xModuleManager->identify( xCurrentFrame );
        }
        catch (const css::frame::UnknownModuleException&)
        {
            SAL_INFO( "sfx.appl", "SfxHelp::getCurrentModuleIdentifier_Impl(): unknown module (help in help?)" );
        }
        catch (const Exception&)
        {
            SAL_WARN( "sfx.appl", "SfxHelp::getCurrentModuleIdentifier_Impl(): exception of XModuleManager::identify()" );
        }
    }

    return sIdentifier;
}

namespace
{
    OUString MapModuleIdentifier(const OUString &rFactoryShortName)
    {
        OUString aFactoryShortName(rFactoryShortName);

        // Map some module identifiers to their "real" help module string.
        if ( aFactoryShortName == "chart2" )
            aFactoryShortName = "schart" ;
        else if ( aFactoryShortName == "BasicIDE" )
            aFactoryShortName = "sbasic";
        else if ( aFactoryShortName == "sweb"
                || aFactoryShortName == "sglobal"
                || aFactoryShortName == "swxform" )
            aFactoryShortName = "swriter" ;
        else if ( aFactoryShortName == "dbquery"
                || aFactoryShortName == "dbbrowser"
                || aFactoryShortName == "dbrelation"
                || aFactoryShortName == "dbtable"
                || aFactoryShortName == "dbapp"
                || aFactoryShortName == "dbreport"
                || aFactoryShortName == "dbtdata"
                || aFactoryShortName == "swreport"
                || aFactoryShortName == "swform" )
            aFactoryShortName = "sdatabase";
        else if ( aFactoryShortName == "sbibliography"
                || aFactoryShortName == "sabpilot"
                || aFactoryShortName == "scanner"
                || aFactoryShortName == "spropctrlr"
                || aFactoryShortName == "StartModule" )
            aFactoryShortName.clear();

        return aFactoryShortName;
    }
}

OUString SfxHelp::GetHelpModuleName_Impl(const OUString& rHelpID)
{
    OUString aFactoryShortName;

    //rhbz#1438876 detect preferred module for this help id, e.g. csv dialog
    //for calc import before any toplevel is created and so context is
    //otherwise unknown. Cosmetic, same help is shown in any case because its
    //in the shared section, but title bar would state "Writer" when context is
    //expected to be "Calc"
    OUString sRemainder;
    if (rHelpID.startsWith("modules/", &sRemainder))
    {
        sal_Int32 nEndModule = sRemainder.indexOf('/');
        aFactoryShortName = nEndModule != -1 ? sRemainder.copy(0, nEndModule) : sRemainder;
    }

    if (aFactoryShortName.isEmpty())
    {
        OUString aModuleIdentifier = getCurrentModuleIdentifier_Impl();
        if (!aModuleIdentifier.isEmpty())
        {
            try
            {
                Reference < XModuleManager2 > xModuleManager(
                    ModuleManager::create(::comphelper::getProcessComponentContext()) );
                Sequence< PropertyValue > lProps;
                xModuleManager->getByName( aModuleIdentifier ) >>= lProps;
                for ( sal_Int32 i = 0; i < lProps.getLength(); ++i )
                {
                    if ( lProps[i].Name == "ooSetupFactoryShortName" )
                    {
                        lProps[i].Value >>= aFactoryShortName;
                        break;
                    }
                }
            }
            catch (const Exception&)
            {
                SAL_WARN( "sfx.appl", "SfxHelp::GetHelpModuleName_Impl(): exception of XNameAccess::getByName()" );
            }
        }
    }

    if (!aFactoryShortName.isEmpty())
        aFactoryShortName = MapModuleIdentifier(aFactoryShortName);
    if (aFactoryShortName.isEmpty())
        aFactoryShortName = getDefaultModule_Impl();

    return aFactoryShortName;
}

OUString SfxHelp::CreateHelpURL_Impl( const OUString& aCommandURL, const OUString& rModuleName )
{
    // build up the help URL
    OUStringBuffer aHelpURL("vnd.sun.star.help://");
    bool bHasAnchor = false;
    OUString aAnchor;

    OUString aModuleName( rModuleName );
    if (aModuleName.isEmpty())
        aModuleName = getDefaultModule_Impl();

    aHelpURL.append(aModuleName);

    if ( aCommandURL.isEmpty() )
        aHelpURL.append("/start");
    else
    {
        aHelpURL.append('/');
        aHelpURL.append(rtl::Uri::encode(aCommandURL,
                                              rtl_UriCharClassRelSegment,
                                              rtl_UriEncodeKeepEscapes,
                                              RTL_TEXTENCODING_UTF8));

        OUStringBuffer aTempURL = aHelpURL;
        AppendConfigToken( aTempURL, true );
        bHasAnchor = GetHelpAnchor_Impl(aTempURL.makeStringAndClear(), aAnchor);
    }

    AppendConfigToken( aHelpURL, true );

    if ( bHasAnchor )
    {
        aHelpURL.append('#');
        aHelpURL.append(aAnchor);
    }

    return aHelpURL.makeStringAndClear();
}

SfxHelpWindow_Impl* impl_createHelp(Reference< XFrame2 >& rHelpTask   ,
                                    Reference< XFrame >& rHelpContent)
{
    Reference < XDesktop2 > xDesktop = Desktop::create( ::comphelper::getProcessComponentContext() );

    // otherwise - create new help task
    Reference< XFrame2 > xHelpTask(
        xDesktop->findFrame(  "OFFICE_HELP_TASK", FrameSearchFlag::TASKS | FrameSearchFlag::CREATE),
        UNO_QUERY);
    if (!xHelpTask.is())
        return nullptr;

    // create all internal windows and sub frames ...
    Reference< css::awt::XWindow >      xParentWindow = xHelpTask->getContainerWindow();
    VclPtr<vcl::Window>                 pParentWindow = VCLUnoHelper::GetWindow( xParentWindow );
    VclPtrInstance<SfxHelpWindow_Impl>  pHelpWindow( xHelpTask, pParentWindow );
    Reference< css::awt::XWindow >      xHelpWindow   = VCLUnoHelper::GetInterface( pHelpWindow );

    Reference< XFrame > xHelpContent;
    if (xHelpTask->setComponent( xHelpWindow, Reference< XController >() ))
    {
        // Customize UI ...
        xHelpTask->setName("OFFICE_HELP_TASK");

        Reference< XPropertySet > xProps(xHelpTask, UNO_QUERY);
        if (xProps.is())
            xProps->setPropertyValue(
                "Title",
                makeAny(SfxResId(STR_HELP_WINDOW_TITLE)));

        pHelpWindow->setContainerWindow( xParentWindow );
        xParentWindow->setVisible(true);
        xHelpWindow->setVisible(true);

        // This sub frame is created internally (if we called new SfxHelpWindow_Impl() ...)
        // It should exist :-)
        xHelpContent = xHelpTask->findFrame("OFFICE_HELP", FrameSearchFlag::CHILDREN);
    }

    if (!xHelpContent.is())
    {
        pHelpWindow.disposeAndClear();
        return nullptr;
    }

    xHelpContent->setName("OFFICE_HELP");

    rHelpTask    = xHelpTask;
    rHelpContent = xHelpContent;
    return pHelpWindow;
}

OUString SfxHelp::GetHelpText( const OUString& aCommandURL, const vcl::Window* pWindow )
{
    OUString sModuleName = GetHelpModuleName_Impl(aCommandURL);
    OUString sRealCommand = vcl::CommandInfoProvider::GetRealCommandForCommand( aCommandURL, getCurrentModuleIdentifier_Impl() );
    OUString sHelpText = SfxHelp_Impl::GetHelpText( sRealCommand.isEmpty() ? aCommandURL : sRealCommand, sModuleName );

    OString aNewHelpId;

    if (pWindow && sHelpText.isEmpty())
    {
        // no help text found -> try with parent help id.
        vcl::Window* pParent = pWindow->GetParent();
        while ( pParent )
        {
            aNewHelpId = pParent->GetHelpId();
            sHelpText = SfxHelp_Impl::GetHelpText( OStringToOUString(aNewHelpId, RTL_TEXTENCODING_UTF8), sModuleName );
            if (!sHelpText.isEmpty())
                pParent = nullptr;
            else
                pParent = pParent->GetParent();
        }

        if (bIsDebug && sHelpText.isEmpty())
            aNewHelpId.clear();
    }

    // add some debug information?
    if ( bIsDebug )
    {
        sHelpText += "\n-------------\n";
        sHelpText += sModuleName;
        sHelpText += ": ";
        sHelpText += aCommandURL;
        if ( !aNewHelpId.isEmpty() )
        {
            sHelpText += " - ";
            sHelpText += OStringToOUString(aNewHelpId, RTL_TEXTENCODING_UTF8);
        }
    }

    return sHelpText;
}

/// Check for built-in help
static bool impl_hasHelpInstalled( const OUString &rLang = OUString() )
{
    if (comphelper::LibreOfficeKit::isActive())
        return false;

    OUStringBuffer aHelpRootURL("vnd.sun.star.help://");
    AppendConfigToken(aHelpRootURL, true, rLang);
    std::vector< OUString > aFactories = SfxContentHelper::GetResultSet(aHelpRootURL.makeStringAndClear());

    return !aFactories.empty();
}

bool SfxHelp::SearchKeyword( const OUString& rKeyword )
{
    return Start_Impl( OUString(), nullptr, rKeyword );
}

bool SfxHelp::Start( const OUString& rURL, const vcl::Window* pWindow )
{
    return Start_Impl( rURL, pWindow, OUString() );
}

/// Redirect the vnd.sun.star.help:// urls to http://help.libreoffice.org
static bool impl_showOnlineHelp( const OUString& rURL )
{
    OUString aInternal( "vnd.sun.star.help://"  );
    if ( rURL.getLength() <= aInternal.getLength() || !rURL.startsWith(aInternal) )
        return false;

    OUString aHelpLink("https://help.collaboraoffice.com/help.html?");

    OUString aTarget = "Target=" + rURL.copy(aInternal.getLength());
    aTarget = aTarget.replaceAll("%2F", "/").replaceAll("?", "&");
    aHelpLink += aTarget;

    if (comphelper::LibreOfficeKit::isActive())
    {
        if(SfxViewShell* pViewShell = SfxViewShell::Current())
        {
            pViewShell->libreOfficeKitViewCallback(LOK_CALLBACK_HYPERLINK_CLICKED,
                                                   aHelpLink.toUtf8().getStr());
            return true;
        }
        return false;
    }

    try
    {
        sfx2::openUriExternally(aHelpLink, false);
        return true;
    }
    catch (const Exception&)
    {
    }
    return false;
}

bool SfxHelp::Start_Impl(const OUString& rURL, const vcl::Window* pWindow, const OUString& rKeyword)
{
    OUStringBuffer aHelpRootURL("vnd.sun.star.help://");
    AppendConfigToken(aHelpRootURL, true);
    SfxContentHelper::GetResultSet(aHelpRootURL.makeStringAndClear());

    /* rURL may be
        - a "real" URL
        - a HelpID (formerly a long, now a string)
       If rURL is a URL, CreateHelpURL should be called for this URL
       If rURL is an arbitrary string, the same should happen, but the URL should be tried out
       if it delivers real help content. In case only the Help Error Document is returned, the
       parent of the window for that help was called, is asked for its HelpID.
       For compatibility reasons this upward search is not implemented for "real" URLs.
       Help keyword search now is implemented as own method; in former versions it
       was done via Help::Start, but this implementation conflicted with the upward search.
    */
    OUString aHelpURL;
    INetURLObject aParser( rURL );
    INetProtocol nProtocol = aParser.GetProtocol();

    switch ( nProtocol )
    {
        case INetProtocol::VndSunStarHelp:
            // already a vnd.sun.star.help URL -> nothing to do
            aHelpURL = rURL;
            break;
        default:
        {
            OUString aHelpModuleName(GetHelpModuleName_Impl(rURL));
            OUString aRealCommand;

            if ( nProtocol == INetProtocol::Uno )
                // Command can be just an alias to another command.
                aRealCommand = vcl::CommandInfoProvider::GetRealCommandForCommand( rURL, getCurrentModuleIdentifier_Impl() );

            // no URL, just a HelpID (maybe empty in case of keyword search)
            aHelpURL = CreateHelpURL_Impl( aRealCommand.isEmpty() ? rURL : aRealCommand, aHelpModuleName );

            if ( impl_hasHelpInstalled() && pWindow && SfxContentHelper::IsHelpErrorDocument( aHelpURL ) )
            {
                // no help found -> try with parent help id.
                vcl::Window* pParent = pWindow->GetParent();
                bool bTriedTabPage = false;
                while ( pParent )
                {
                    OString aHelpId = pParent->GetHelpId();
                    aHelpURL = CreateHelpURL( OStringToOUString(aHelpId, RTL_TEXTENCODING_UTF8), aHelpModuleName );
                    if ( !SfxContentHelper::IsHelpErrorDocument( aHelpURL ) )
                    {
                        break;
                    }
                    else
                    {
                        pParent = pParent->GetParent();
                        if (!pParent)
                        {
                            // create help url of start page ( helpid == 0 -> start page)
                            aHelpURL = CreateHelpURL( OUString(), aHelpModuleName );
                        }
                        else if (pParent->IsDialog() && !bTriedTabPage)
                        {
                            //During help fallback, before we ask a dialog for its help
                            //see if it has a TabControl and ask the active tab of
                            //that for help
                            bTriedTabPage = true;
                            Dialog *pDialog = static_cast<Dialog*>(pParent);
                            TabControl *pCtrl = pDialog->hasBuilder() ? pDialog->get<TabControl>("tabcontrol") : nullptr;
                            TabPage* pTabPage = pCtrl ? pCtrl->GetTabPage(pCtrl->GetCurPageId()) : nullptr;
                            vcl::Window *pTabChild = pTabPage ? pTabPage->GetWindow(GetWindowType::FirstChild) : nullptr;
                            if (pTabChild)
                                pParent = pTabChild;
                        }
                    }
                }
            }
            break;
        }
    }

    if ( comphelper::LibreOfficeKit::isActive() )
    {
        impl_showOnlineHelp( aHelpURL );
        return true;
    }

    if ( !impl_hasHelpInstalled() )
    {
        ScopedVclPtrInstance< MessageDialog > aQueryBox(const_cast< vcl::Window* >( pWindow ),"onlinehelpmanual","sfx/ui/helpmanual.ui");
        short OnlineHelpBox = aQueryBox->Execute();

        if(OnlineHelpBox == RET_OK)
        {
            if ( impl_showOnlineHelp( aHelpURL ) )
                return true;
            else
            {
                ScopedVclPtrInstance< NoHelpErrorBox > aErrBox(const_cast< vcl::Window* >( pWindow ));
                aErrBox->Execute();
                return false;
            }
        }
        else
        {
            return false;
        }

    }

    Reference < XDesktop2 > xDesktop = Desktop::create( ::comphelper::getProcessComponentContext() );

    // check if help window is still open
    // If not, create a new one and return access directly to the internal sub frame showing the help content
    // search must be done here; search one desktop level could return an arbitrary frame
    Reference< XFrame2 > xHelp(
        xDesktop->findFrame( "OFFICE_HELP_TASK", FrameSearchFlag::CHILDREN),
        UNO_QUERY);
    Reference< XFrame > xHelpContent = xDesktop->findFrame(
        "OFFICE_HELP",
        FrameSearchFlag::CHILDREN);

    SfxHelpWindow_Impl* pHelpWindow = nullptr;
    if (!xHelp.is())
        pHelpWindow = impl_createHelp(xHelp, xHelpContent);
    else
        pHelpWindow = static_cast<SfxHelpWindow_Impl*>(VCLUnoHelper::GetWindow(xHelp->getComponentWindow()).get());
    if (!xHelp.is() || !xHelpContent.is() || !pHelpWindow)
        return false;

    SAL_INFO("sfx.appl", "HelpId = " << aHelpURL);

    pHelpWindow->SetHelpURL( aHelpURL );
    pHelpWindow->loadHelpContent(aHelpURL);
    if (!rKeyword.isEmpty())
        pHelpWindow->OpenKeyword( rKeyword );

    Reference < css::awt::XTopWindow > xTopWindow( xHelp->getContainerWindow(), UNO_QUERY );
    if ( xTopWindow.is() )
        xTopWindow->toFront();

    return true;
}

OUString SfxHelp::CreateHelpURL(const OUString& aCommandURL, const OUString& rModuleName)
{
    SfxHelp* pHelp = static_cast< SfxHelp* >(Application::GetHelp());
    return pHelp ? SfxHelp::CreateHelpURL_Impl( aCommandURL, rModuleName ) : OUString();
}

OUString SfxHelp::GetDefaultHelpModule()
{
    return getDefaultModule_Impl();
}

OUString SfxHelp::GetCurrentModuleIdentifier()
{
    return getCurrentModuleIdentifier_Impl();
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */