src/common/docview.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/docview.cpp
   3 // Purpose:     Document/view classes
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_DOC_VIEW_ARCHITECTURE
  28
  29 #include "wx/docview.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/list.h"
  33     #include "wx/string.h"
  34     #include "wx/utils.h"
  35     #include "wx/app.h"
  36     #include "wx/dc.h"
  37     #include "wx/dialog.h"
  38     #include "wx/menu.h"
  39     #include "wx/filedlg.h"
  40     #include "wx/intl.h"
  41     #include "wx/log.h"
  42     #include "wx/msgdlg.h"
  43     #include "wx/mdi.h"
  44     #include "wx/choicdlg.h"
  45 #endif
  46
  47 #if wxUSE_PRINTING_ARCHITECTURE
  48     #include "wx/prntbase.h"
  49     #include "wx/printdlg.h"
  50 #endif
  51
  52 #include "wx/confbase.h"
  53 #include "wx/filename.h"
  54 #include "wx/file.h"
  55 #include "wx/ffile.h"
  56 #include "wx/cmdproc.h"
  57 #include "wx/tokenzr.h"
  58 #include "wx/filename.h"
  59 #include "wx/stdpaths.h"
  60 #include "wx/vector.h"
  61 #include "wx/scopedarray.h"
  62 #include "wx/scopedptr.h"
  63 #include "wx/except.h"
  64
  65 #if wxUSE_STD_IOSTREAM
  66     #include "wx/ioswrap.h"
  67     #include "wx/beforestd.h"
  68     #if wxUSE_IOSTREAMH
  69         #include <fstream.h>
  70     #else
  71         #include <fstream>
  72     #endif
  73     #include "wx/afterstd.h"
  74 #else
  75     #include "wx/wfstream.h"
  76 #endif
  77
  78 typedef wxVector<wxDocTemplate *> wxDocTemplates;
  79
  80 // ----------------------------------------------------------------------------
  81 // wxWidgets macros
  82 // ----------------------------------------------------------------------------
  83
  84 IMPLEMENT_ABSTRACT_CLASS(wxDocument, wxEvtHandler)
  85 IMPLEMENT_ABSTRACT_CLASS(wxView, wxEvtHandler)
  86 IMPLEMENT_ABSTRACT_CLASS(wxDocTemplate, wxObject)
  87 IMPLEMENT_DYNAMIC_CLASS(wxDocManager, wxEvtHandler)
  88 IMPLEMENT_CLASS(wxDocChildFrame, wxFrame)
  89 IMPLEMENT_CLASS(wxDocParentFrame, wxFrame)
  90
  91 #if wxUSE_PRINTING_ARCHITECTURE
  92     IMPLEMENT_DYNAMIC_CLASS(wxDocPrintout, wxPrintout)
  93 #endif
  94
  95 // ============================================================================
  96 // implementation
  97 // ============================================================================
  98
  99 // ----------------------------------------------------------------------------
 100 // private helpers
 101 // ----------------------------------------------------------------------------
 102
 103 namespace
 104 {
 105
 106 wxString FindExtension(const wxString& path)
 107 {
 108     wxString ext;
 109     wxFileName::SplitPath(path, NULL, NULL, &ext);
 110
 111     // VZ: extensions are considered not case sensitive - is this really a good
 112     //     idea?
 113     return ext.MakeLower();
 114 }
 115
 116 } // anonymous namespace
 117
 118 // ----------------------------------------------------------------------------
 119 // Definition of wxDocument
 120 // ----------------------------------------------------------------------------
 121
 122 wxDocument::wxDocument(wxDocument *parent)
 123 {
 124     m_documentModified = false;
 125     m_documentParent = parent;
 126     m_documentTemplate = NULL;
 127     m_commandProcessor = NULL;
 128     m_savedYet = false;
 129 }
 130
 131 bool wxDocument::DeleteContents()
 132 {
 133     return true;
 134 }
 135
 136 wxDocument::~wxDocument()
 137 {
 138     delete m_commandProcessor;
 139
 140     if (GetDocumentManager())
 141         GetDocumentManager()->RemoveDocument(this);
 142
 143     // Not safe to do here, since it'll invoke virtual view functions
 144     // expecting to see valid derived objects: and by the time we get here,
 145     // we've called destructors higher up.
 146     //DeleteAllViews();
 147 }
 148
 149 bool wxDocument::Close()
 150 {
 151     if ( !OnSaveModified() )
 152         return false;
 153
 154     return OnCloseDocument();
 155 }
 156
 157 bool wxDocument::OnCloseDocument()
 158 {
 159     // Tell all views that we're about to close
 160     NotifyClosing();
 161     DeleteContents();
 162     Modify(false);
 163     return true;
 164 }
 165
 166 // Note that this implicitly deletes the document when the last view is
 167 // deleted.
 168 bool wxDocument::DeleteAllViews()
 169 {
 170     wxDocManager* manager = GetDocumentManager();
 171
 172     // first check if all views agree to be closed
 173     const wxList::iterator end = m_documentViews.end();
 174     for ( wxList::iterator i = m_documentViews.begin(); i != end; ++i )
 175     {
 176         wxView *view = (wxView *)*i;
 177         if ( !view->Close() )
 178             return false;
 179     }
 180
 181     // all views agreed to close, now do close them
 182     if ( m_documentViews.empty() )
 183     {
 184         // normally the document would be implicitly deleted when the last view
 185         // is, but if don't have any views, do it here instead
 186         if ( manager && manager->GetDocuments().Member(this) )
 187             delete this;
 188     }
 189     else // have views
 190     {
 191         // as we delete elements we iterate over, don't use the usual "from
 192         // begin to end" loop
 193         for ( ;; )
 194         {
 195             wxView *view = (wxView *)*m_documentViews.begin();
 196
 197             bool isLastOne = m_documentViews.size() == 1;
 198
 199             // this always deletes the node implicitly and if this is the last
 200             // view also deletes this object itself (also implicitly, great),
 201             // so we can't test for m_documentViews.empty() after calling this!
 202             delete view;
 203
 204             if ( isLastOne )
 205                 break;
 206         }
 207     }
 208
 209     return true;
 210 }
 211
 212 wxView *wxDocument::GetFirstView() const
 213 {
 214     if ( m_documentViews.empty() )
 215         return NULL;
 216
 217     return static_cast<wxView *>(m_documentViews.GetFirst()->GetData());
 218 }
 219
 220 void wxDocument::Modify(bool mod)
 221 {
 222     if (mod != m_documentModified)
 223     {
 224         m_documentModified = mod;
 225
 226         // Allow views to append asterix to the title
 227         wxView* view = GetFirstView();
 228         if (view) view->OnChangeFilename();
 229     }
 230 }
 231
 232 wxDocManager *wxDocument::GetDocumentManager() const
 233 {
 234     return m_documentTemplate ? m_documentTemplate->GetDocumentManager() : NULL;
 235 }
 236
 237 bool wxDocument::OnNewDocument()
 238 {
 239     // notice that there is no need to neither reset nor even check the
 240     // modified flag here as the document itself is a new object (this is only
 241     // called from CreateDocument()) and so it shouldn't be saved anyhow even
 242     // if it is modified -- this could happen if the user code creates
 243     // documents pre-filled with some user-entered (and which hence must not be
 244     // lost) information
 245
 246     SetDocumentSaved(false);
 247
 248     const wxString name = GetDocumentManager()->MakeNewDocumentName();
 249     SetTitle(name);
 250     SetFilename(name, true);
 251
 252     return true;
 253 }
 254
 255 bool wxDocument::Save()
 256 {
 257     if ( AlreadySaved() )
 258         return true;
 259
 260     if ( m_documentFile.empty() || !m_savedYet )
 261         return SaveAs();
 262
 263     return OnSaveDocument(m_documentFile);
 264 }
 265
 266 bool wxDocument::SaveAs()
 267 {
 268     wxDocTemplate *docTemplate = GetDocumentTemplate();
 269     if (!docTemplate)
 270         return false;
 271
 272 #ifdef wxHAS_MULTIPLE_FILEDLG_FILTERS
 273     wxString filter = docTemplate->GetDescription() + wxT(" (") +
 274         docTemplate->GetFileFilter() + wxT(")|") +
 275         docTemplate->GetFileFilter();
 276
 277     // Now see if there are some other template with identical view and document
 278     // classes, whose filters may also be used.
 279     if (docTemplate->GetViewClassInfo() && docTemplate->GetDocClassInfo())
 280     {
 281         wxList::compatibility_iterator
 282             node = docTemplate->GetDocumentManager()->GetTemplates().GetFirst();
 283         while (node)
 284         {
 285             wxDocTemplate *t = (wxDocTemplate*) node->GetData();
 286
 287             if (t->IsVisible() && t != docTemplate &&
 288                 t->GetViewClassInfo() == docTemplate->GetViewClassInfo() &&
 289                 t->GetDocClassInfo() == docTemplate->GetDocClassInfo())
 290             {
 291                 // add a '|' to separate this filter from the previous one
 292                 if ( !filter.empty() )
 293                     filter << wxT('|');
 294
 295                 filter << t->GetDescription()
 296                        << wxT(" (") << t->GetFileFilter() << wxT(") |")
 297                        << t->GetFileFilter();
 298             }
 299
 300             node = node->GetNext();
 301         }
 302     }
 303 #else
 304     wxString filter = docTemplate->GetFileFilter() ;
 305 #endif
 306
 307     wxString defaultDir = docTemplate->GetDirectory();
 308     if ( defaultDir.empty() )
 309     {
 310         defaultDir = wxPathOnly(GetFilename());
 311         if ( defaultDir.empty() )
 312             defaultDir = GetDocumentManager()->GetLastDirectory();
 313     }
 314
 315     wxString fileName = wxFileSelector(_("Save As"),
 316             defaultDir,
 317             wxFileNameFromPath(GetFilename()),
 318             docTemplate->GetDefaultExtension(),
 319             filter,
 320             wxFD_SAVE | wxFD_OVERWRITE_PROMPT,
 321             GetDocumentWindow());
 322
 323     if (fileName.empty())
 324         return false; // cancelled by user
 325
 326     // Files that were not saved correctly are not added to the FileHistory.
 327     if (!OnSaveDocument(fileName))
 328         return false;
 329
 330     SetTitle(wxFileNameFromPath(fileName));
 331     SetFilename(fileName, true);    // will call OnChangeFileName automatically
 332
 333     // A file that doesn't use the default extension of its document template
 334     // cannot be opened via the FileHistory, so we do not add it.
 335     if (docTemplate->FileMatchesTemplate(fileName))
 336     {
 337         GetDocumentManager()->AddFileToHistory(fileName);
 338     }
 339     //else: the user will probably not be able to open the file again, so we
 340     //      could warn about the wrong file-extension here
 341
 342     return true;
 343 }
 344
 345 bool wxDocument::OnSaveDocument(const wxString& file)
 346 {
 347     if ( !file )
 348         return false;
 349
 350     if ( !DoSaveDocument(file) )
 351         return false;
 352
 353     Modify(false);
 354     SetFilename(file);
 355     SetDocumentSaved(true);
 356 #if defined( __WXOSX_MAC__ ) && wxOSX_USE_CARBON
 357     wxFileName fn(file) ;
 358     fn.MacSetDefaultTypeAndCreator() ;
 359 #endif
 360     return true;
 361 }
 362
 363 bool wxDocument::OnOpenDocument(const wxString& file)
 364 {
 365     // notice that there is no need to check the modified flag here for the
 366     // reasons explained in OnNewDocument()
 367
 368     if ( !DoOpenDocument(file) )
 369         return false;
 370
 371     SetFilename(file, true);
 372
 373     // stretching the logic a little this does make sense because the document
 374     // had been saved into the file we just loaded it from, it just could have
 375     // happened during a previous program execution, it's just that the name of
 376     // this method is a bit unfortunate, it should probably have been called
 377     // HasAssociatedFileName()
 378     SetDocumentSaved(true);
 379
 380     UpdateAllViews();
 381
 382     return true;
 383 }
 384
 385 #if wxUSE_STD_IOSTREAM
 386 wxSTD istream& wxDocument::LoadObject(wxSTD istream& stream)
 387 #else
 388 wxInputStream& wxDocument::LoadObject(wxInputStream& stream)
 389 #endif
 390 {
 391     return stream;
 392 }
 393
 394 #if wxUSE_STD_IOSTREAM
 395 wxSTD ostream& wxDocument::SaveObject(wxSTD ostream& stream)
 396 #else
 397 wxOutputStream& wxDocument::SaveObject(wxOutputStream& stream)
 398 #endif
 399 {
 400     return stream;
 401 }
 402
 403 bool wxDocument::Revert()
 404 {
 405     if ( wxMessageBox
 406          (
 407             _("Discard changes and reload the last saved version?"),
 408             wxTheApp->GetAppDisplayName(),
 409             wxYES_NO | wxCANCEL | wxICON_QUESTION,
 410             GetDocumentWindow()
 411           ) != wxYES )
 412         return false;
 413
 414     if ( !DoOpenDocument(GetFilename()) )
 415         return false;
 416
 417     Modify(false);
 418     UpdateAllViews();
 419
 420     return true;
 421 }
 422
 423
 424 // Get title, or filename if no title, else unnamed
 425 #if WXWIN_COMPATIBILITY_2_8
 426 bool wxDocument::GetPrintableName(wxString& buf) const
 427 {
 428     // this function can not only be overridden by the user code but also
 429     // called by it so we need to ensure that we return the same thing as
 430     // GetUserReadableName() but we can't call it because this would result in
 431     // an infinite recursion, hence we use the helper DoGetUserReadableName()
 432     buf = DoGetUserReadableName();
 433
 434     return true;
 435 }
 436 #endif // WXWIN_COMPATIBILITY_2_8
 437
 438 wxString wxDocument::GetUserReadableName() const
 439 {
 440 #if WXWIN_COMPATIBILITY_2_8
 441     // we need to call the old virtual function to ensure that the overridden
 442     // version of it is still called
 443     wxString name;
 444     if ( GetPrintableName(name) )
 445         return name;
 446 #endif // WXWIN_COMPATIBILITY_2_8
 447
 448     return DoGetUserReadableName();
 449 }
 450
 451 wxString wxDocument::DoGetUserReadableName() const
 452 {
 453     if ( !m_documentTitle.empty() )
 454         return m_documentTitle;
 455
 456     if ( !m_documentFile.empty() )
 457         return wxFileNameFromPath(m_documentFile);
 458
 459     return _("unnamed");
 460 }
 461
 462 wxWindow *wxDocument::GetDocumentWindow() const
 463 {
 464     wxView * const view = GetFirstView();
 465
 466     return view ? view->GetFrame() : wxTheApp->GetTopWindow();
 467 }
 468
 469 wxCommandProcessor *wxDocument::OnCreateCommandProcessor()
 470 {
 471     return new wxCommandProcessor;
 472 }
 473
 474 // true if safe to close
 475 bool wxDocument::OnSaveModified()
 476 {
 477     if ( IsModified() )
 478     {
 479         switch ( wxMessageBox
 480                  (
 481                     wxString::Format
 482                     (
 483                      _("Do you want to save changes to %s?"),
 484                      GetUserReadableName()
 485                     ),
 486                     wxTheApp->GetAppDisplayName(),
 487                     wxYES_NO | wxCANCEL | wxICON_QUESTION | wxCENTRE
 488                  ) )
 489         {
 490             case wxNO:
 491                 Modify(false);
 492                 break;
 493
 494             case wxYES:
 495                 return Save();
 496
 497             case wxCANCEL:
 498                 return false;
 499         }
 500     }
 501
 502     return true;
 503 }
 504
 505 bool wxDocument::Draw(wxDC& WXUNUSED(context))
 506 {
 507     return true;
 508 }
 509
 510 bool wxDocument::AddView(wxView *view)
 511 {
 512     if ( !m_documentViews.Member(view) )
 513     {
 514         m_documentViews.Append(view);
 515         OnChangedViewList();
 516     }
 517     return true;
 518 }
 519
 520 bool wxDocument::RemoveView(wxView *view)
 521 {
 522     (void)m_documentViews.DeleteObject(view);
 523     OnChangedViewList();
 524     return true;
 525 }
 526
 527 bool wxDocument::OnCreate(const wxString& WXUNUSED(path), long flags)
 528 {
 529     return GetDocumentTemplate()->CreateView(this, flags) != NULL;
 530 }
 531
 532 // Called after a view is added or removed.
 533 // The default implementation deletes the document if
 534 // there are no more views.
 535 void wxDocument::OnChangedViewList()
 536 {
 537     if ( m_documentViews.empty() && OnSaveModified() )
 538         delete this;
 539 }
 540
 541 void wxDocument::UpdateAllViews(wxView *sender, wxObject *hint)
 542 {
 543     wxList::compatibility_iterator node = m_documentViews.GetFirst();
 544     while (node)
 545     {
 546         wxView *view = (wxView *)node->GetData();
 547         if (view != sender)
 548             view->OnUpdate(sender, hint);
 549         node = node->GetNext();
 550     }
 551 }
 552
 553 void wxDocument::NotifyClosing()
 554 {
 555     wxList::compatibility_iterator node = m_documentViews.GetFirst();
 556     while (node)
 557     {
 558         wxView *view = (wxView *)node->GetData();
 559         view->OnClosingDocument();
 560         node = node->GetNext();
 561     }
 562 }
 563
 564 void wxDocument::SetFilename(const wxString& filename, bool notifyViews)
 565 {
 566     m_documentFile = filename;
 567     OnChangeFilename(notifyViews);
 568 }
 569
 570 void wxDocument::OnChangeFilename(bool notifyViews)
 571 {
 572     if ( notifyViews )
 573     {
 574         // Notify the views that the filename has changed
 575         wxList::compatibility_iterator node = m_documentViews.GetFirst();
 576         while (node)
 577         {
 578             wxView *view = (wxView *)node->GetData();
 579             view->OnChangeFilename();
 580             node = node->GetNext();
 581         }
 582     }
 583 }
 584
 585 bool wxDocument::DoSaveDocument(const wxString& file)
 586 {
 587 #if wxUSE_STD_IOSTREAM
 588     wxSTD ofstream store(file.mb_str(), wxSTD ios::binary);
 589     if ( !store )
 590 #else
 591     wxFileOutputStream store(file);
 592     if ( store.GetLastError() != wxSTREAM_NO_ERROR )
 593 #endif
 594     {
 595         wxLogError(_("File \"%s\" could not be opened for writing."), file);
 596         return false;
 597     }
 598
 599     if (!SaveObject(store))
 600     {
 601         wxLogError(_("Failed to save document to the file \"%s\"."), file);
 602         return false;
 603     }
 604
 605     return true;
 606 }
 607
 608 bool wxDocument::DoOpenDocument(const wxString& file)
 609 {
 610 #if wxUSE_STD_IOSTREAM
 611     wxSTD ifstream store(file.mb_str(), wxSTD ios::binary);
 612     if ( !store )
 613 #else
 614     wxFileInputStream store(file);
 615     if (store.GetLastError() != wxSTREAM_NO_ERROR || !store.IsOk())
 616 #endif
 617     {
 618         wxLogError(_("File \"%s\" could not be opened for reading."), file);
 619         return false;
 620     }
 621
 622 #if wxUSE_STD_IOSTREAM
 623     LoadObject(store);
 624     if ( !store )
 625 #else
 626     int res = LoadObject(store).GetLastError();
 627     if ( res != wxSTREAM_NO_ERROR && res != wxSTREAM_EOF )
 628 #endif
 629     {
 630         wxLogError(_("Failed to read document from the file \"%s\"."), file);
 631         return false;
 632     }
 633
 634     return true;
 635 }
 636
 637
 638 // ----------------------------------------------------------------------------
 639 // Document view
 640 // ----------------------------------------------------------------------------
 641
 642 wxView::wxView()
 643 {
 644     m_viewDocument = NULL;
 645
 646     m_viewFrame = NULL;
 647
 648     m_docChildFrame = NULL;
 649 }
 650
 651 wxView::~wxView()
 652 {
 653     if (m_viewDocument && GetDocumentManager())
 654         GetDocumentManager()->ActivateView(this, false);
 655
 656     // reset our frame view first, before removing it from the document as
 657     // SetView(NULL) is a simple call while RemoveView() may result in user
 658     // code being executed and this user code can, for example, show a message
 659     // box which would result in an activation event for m_docChildFrame and so
 660     // could reactivate the view being destroyed -- unless we reset it first
 661     if ( m_docChildFrame && m_docChildFrame->GetView() == this )
 662     {
 663         // prevent it from doing anything with us
 664         m_docChildFrame->SetView(NULL);
 665
 666         // it doesn't make sense to leave the frame alive if its associated
 667         // view doesn't exist any more so unconditionally close it as well
 668         //
 669         // notice that we only get here if m_docChildFrame is non-NULL in the
 670         // first place and it will be always NULL if we're deleted because our
 671         // frame was closed, so this only catches the case of directly deleting
 672         // the view, as it happens if its creation fails in wxDocTemplate::
 673         // CreateView() for example
 674         m_docChildFrame->GetWindow()->Destroy();
 675     }
 676
 677     if ( m_viewDocument )
 678         m_viewDocument->RemoveView(this);
 679 }
 680
 681 void wxView::SetDocChildFrame(wxDocChildFrameAnyBase *docChildFrame)
 682 {
 683     SetFrame(docChildFrame ? docChildFrame->GetWindow() : NULL);
 684     m_docChildFrame = docChildFrame;
 685 }
 686
 687 bool wxView::TryBefore(wxEvent& event)
 688 {
 689     wxDocument * const doc = GetDocument();
 690     return doc && doc->ProcessEventLocally(event);
 691 }
 692
 693 void wxView::OnActivateView(bool WXUNUSED(activate),
 694                             wxView *WXUNUSED(activeView),
 695                             wxView *WXUNUSED(deactiveView))
 696 {
 697 }
 698
 699 void wxView::OnPrint(wxDC *dc, wxObject *WXUNUSED(info))
 700 {
 701     OnDraw(dc);
 702 }
 703
 704 void wxView::OnUpdate(wxView *WXUNUSED(sender), wxObject *WXUNUSED(hint))
 705 {
 706 }
 707
 708 void wxView::OnChangeFilename()
 709 {
 710     // GetFrame can return wxWindow rather than wxTopLevelWindow due to
 711     // generic MDI implementation so use SetLabel rather than SetTitle.
 712     // It should cause SetTitle() for top level windows.
 713     wxWindow *win = GetFrame();
 714     if (!win) return;
 715
 716     wxDocument *doc = GetDocument();
 717     if (!doc) return;
 718
 719     wxString label = doc->GetUserReadableName();
 720     if (doc->IsModified())
 721     {
 722        label += "*";
 723     }
 724     win->SetLabel(label);
 725 }
 726
 727 void wxView::SetDocument(wxDocument *doc)
 728 {
 729     m_viewDocument = doc;
 730     if (doc)
 731         doc->AddView(this);
 732 }
 733
 734 bool wxView::Close(bool deleteWindow)
 735 {
 736     return OnClose(deleteWindow);
 737 }
 738
 739 void wxView::Activate(bool activate)
 740 {
 741     if (GetDocument() && GetDocumentManager())
 742     {
 743         OnActivateView(activate, this, GetDocumentManager()->GetCurrentView());
 744         GetDocumentManager()->ActivateView(this, activate);
 745     }
 746 }
 747
 748 bool wxView::OnClose(bool WXUNUSED(deleteWindow))
 749 {
 750     return GetDocument() ? GetDocument()->Close() : true;
 751 }
 752
 753 #if wxUSE_PRINTING_ARCHITECTURE
 754 wxPrintout *wxView::OnCreatePrintout()
 755 {
 756     return new wxDocPrintout(this);
 757 }
 758 #endif // wxUSE_PRINTING_ARCHITECTURE
 759
 760 // ----------------------------------------------------------------------------
 761 // wxDocTemplate
 762 // ----------------------------------------------------------------------------
 763
 764 wxDocTemplate::wxDocTemplate(wxDocManager *manager,
 765                              const wxString& descr,
 766                              const wxString& filter,
 767                              const wxString& dir,
 768                              const wxString& ext,
 769                              const wxString& docTypeName,
 770                              const wxString& viewTypeName,
 771                              wxClassInfo *docClassInfo,
 772                              wxClassInfo *viewClassInfo,
 773                              long flags)
 774 {
 775     m_documentManager = manager;
 776     m_description = descr;
 777     m_directory = dir;
 778     m_defaultExt = ext;
 779     m_fileFilter = filter;
 780     m_flags = flags;
 781     m_docTypeName = docTypeName;
 782     m_viewTypeName = viewTypeName;
 783     m_documentManager->AssociateTemplate(this);
 784
 785     m_docClassInfo = docClassInfo;
 786     m_viewClassInfo = viewClassInfo;
 787 }
 788
 789 wxDocTemplate::~wxDocTemplate()
 790 {
 791     m_documentManager->DisassociateTemplate(this);
 792 }
 793
 794 // Tries to dynamically construct an object of the right class.
 795 wxDocument *wxDocTemplate::CreateDocument(const wxString& path, long flags)
 796 {
 797     // InitDocument() is supposed to delete the document object if its
 798     // initialization fails so don't use wxScopedPtr<> here: this is fragile
 799     // but unavoidable because the default implementation uses CreateView()
 800     // which may -- or not -- create a wxView and if it does create it and its
 801     // initialization fails then the view destructor will delete the document
 802     // (via RemoveView()) and as we can't distinguish between the two cases we
 803     // just have to assume that it always deletes it in case of failure
 804     wxDocument * const doc = DoCreateDocument();
 805
 806     return doc && InitDocument(doc, path, flags) ? doc : NULL;
 807 }
 808
 809 bool
 810 wxDocTemplate::InitDocument(wxDocument* doc, const wxString& path, long flags)
 811 {
 812     doc->SetFilename(path);
 813     doc->SetDocumentTemplate(this);
 814     GetDocumentManager()->AddDocument(doc);
 815     doc->SetCommandProcessor(doc->OnCreateCommandProcessor());
 816
 817     if (doc->OnCreate(path, flags))
 818         return true;
 819
 820     if (GetDocumentManager()->GetDocuments().Member(doc))
 821         doc->DeleteAllViews();
 822     return false;
 823 }
 824
 825 wxView *wxDocTemplate::CreateView(wxDocument *doc, long flags)
 826 {
 827     wxScopedPtr<wxView> view(DoCreateView());
 828     if ( !view )
 829         return NULL;
 830
 831     view->SetDocument(doc);
 832     if ( !view->OnCreate(doc, flags) )
 833         return NULL;
 834
 835     return view.release();
 836 }
 837
 838 // The default (very primitive) format detection: check is the extension is
 839 // that of the template
 840 bool wxDocTemplate::FileMatchesTemplate(const wxString& path)
 841 {
 842     wxStringTokenizer parser (GetFileFilter(), wxT(";"));
 843     wxString anything = wxT ("*");
 844     while (parser.HasMoreTokens())
 845     {
 846         wxString filter = parser.GetNextToken();
 847         wxString filterExt = FindExtension (filter);
 848         if ( filter.IsSameAs (anything)    ||
 849              filterExt.IsSameAs (anything) ||
 850              filterExt.IsSameAs (FindExtension (path)) )
 851             return true;
 852     }
 853     return GetDefaultExtension().IsSameAs(FindExtension(path));
 854 }
 855
 856 wxDocument *wxDocTemplate::DoCreateDocument()
 857 {
 858     if (!m_docClassInfo)
 859         return NULL;
 860
 861     return static_cast<wxDocument *>(m_docClassInfo->CreateObject());
 862 }
 863
 864 wxView *wxDocTemplate::DoCreateView()
 865 {
 866     if (!m_viewClassInfo)
 867         return NULL;
 868
 869     return static_cast<wxView *>(m_viewClassInfo->CreateObject());
 870 }
 871
 872 // ----------------------------------------------------------------------------
 873 // wxDocManager
 874 // ----------------------------------------------------------------------------
 875
 876 BEGIN_EVENT_TABLE(wxDocManager, wxEvtHandler)
 877     EVT_MENU(wxID_OPEN, wxDocManager::OnFileOpen)
 878     EVT_MENU(wxID_CLOSE, wxDocManager::OnFileClose)
 879     EVT_MENU(wxID_CLOSE_ALL, wxDocManager::OnFileCloseAll)
 880     EVT_MENU(wxID_REVERT, wxDocManager::OnFileRevert)
 881     EVT_MENU(wxID_NEW, wxDocManager::OnFileNew)
 882     EVT_MENU(wxID_SAVE, wxDocManager::OnFileSave)
 883     EVT_MENU(wxID_SAVEAS, wxDocManager::OnFileSaveAs)
 884     EVT_MENU(wxID_UNDO, wxDocManager::OnUndo)
 885     EVT_MENU(wxID_REDO, wxDocManager::OnRedo)
 886
 887     // We don't know in advance how many items can there be in the MRU files
 888     // list so set up OnMRUFile() as a handler for all menu events and do the
 889     // check for the id of the menu item clicked inside it.
 890     EVT_MENU(wxID_ANY, wxDocManager::OnMRUFile)
 891
 892     EVT_UPDATE_UI(wxID_OPEN, wxDocManager::OnUpdateFileOpen)
 893     EVT_UPDATE_UI(wxID_CLOSE, wxDocManager::OnUpdateDisableIfNoDoc)
 894     EVT_UPDATE_UI(wxID_CLOSE_ALL, wxDocManager::OnUpdateDisableIfNoDoc)
 895     EVT_UPDATE_UI(wxID_REVERT, wxDocManager::OnUpdateFileRevert)
 896     EVT_UPDATE_UI(wxID_NEW, wxDocManager::OnUpdateFileNew)
 897     EVT_UPDATE_UI(wxID_SAVE, wxDocManager::OnUpdateFileSave)
 898     EVT_UPDATE_UI(wxID_SAVEAS, wxDocManager::OnUpdateDisableIfNoDoc)
 899     EVT_UPDATE_UI(wxID_UNDO, wxDocManager::OnUpdateUndo)
 900     EVT_UPDATE_UI(wxID_REDO, wxDocManager::OnUpdateRedo)
 901
 902 #if wxUSE_PRINTING_ARCHITECTURE
 903     EVT_MENU(wxID_PRINT, wxDocManager::OnPrint)
 904     EVT_MENU(wxID_PREVIEW, wxDocManager::OnPreview)
 905     EVT_MENU(wxID_PRINT_SETUP, wxDocManager::OnPageSetup)
 906
 907     EVT_UPDATE_UI(wxID_PRINT, wxDocManager::OnUpdateDisableIfNoDoc)
 908     EVT_UPDATE_UI(wxID_PREVIEW, wxDocManager::OnUpdateDisableIfNoDoc)
 909     // NB: we keep "Print setup" menu item always enabled as it can be used
 910     //     even without an active document
 911 #endif // wxUSE_PRINTING_ARCHITECTURE
 912 END_EVENT_TABLE()
 913
 914 wxDocManager* wxDocManager::sm_docManager = NULL;
 915
 916 wxDocManager::wxDocManager(long WXUNUSED(flags), bool initialize)
 917 {
 918     sm_docManager = this;
 919
 920     m_defaultDocumentNameCounter = 1;
 921     m_currentView = NULL;
 922     m_maxDocsOpen = INT_MAX;
 923     m_fileHistory = NULL;
 924     if ( initialize )
 925         Initialize();
 926 }
 927
 928 wxDocManager::~wxDocManager()
 929 {
 930     Clear();
 931     delete m_fileHistory;
 932     sm_docManager = NULL;
 933 }
 934
 935 // closes the specified document
 936 bool wxDocManager::CloseDocument(wxDocument* doc, bool force)
 937 {
 938     if ( !doc->Close() && !force )
 939         return false;
 940
 941     // Implicitly deletes the document when
 942     // the last view is deleted
 943     doc->DeleteAllViews();
 944
 945     // Check we're really deleted
 946     if (m_docs.Member(doc))
 947         delete doc;
 948
 949     return true;
 950 }
 951
 952 bool wxDocManager::CloseDocuments(bool force)
 953 {
 954     wxList::compatibility_iterator node = m_docs.GetFirst();
 955     while (node)
 956     {
 957         wxDocument *doc = (wxDocument *)node->GetData();
 958         wxList::compatibility_iterator next = node->GetNext();
 959
 960         if (!CloseDocument(doc, force))
 961             return false;
 962
 963         // This assumes that documents are not connected in
 964         // any way, i.e. deleting one document does NOT
 965         // delete another.
 966         node = next;
 967     }
 968     return true;
 969 }
 970
 971 bool wxDocManager::Clear(bool force)
 972 {
 973     if (!CloseDocuments(force))
 974         return false;
 975
 976     m_currentView = NULL;
 977
 978     wxList::compatibility_iterator node = m_templates.GetFirst();
 979     while (node)
 980     {
 981         wxDocTemplate *templ = (wxDocTemplate*) node->GetData();
 982         wxList::compatibility_iterator next = node->GetNext();
 983         delete templ;
 984         node = next;
 985     }
 986     return true;
 987 }
 988
 989 bool wxDocManager::Initialize()
 990 {
 991     m_fileHistory = OnCreateFileHistory();
 992     return true;
 993 }
 994
 995 wxString wxDocManager::GetLastDirectory() const
 996 {
 997     // if we haven't determined the last used directory yet, do it now
 998     if ( m_lastDirectory.empty() )
 999     {
1000         // we're going to modify m_lastDirectory in this const method, so do it
1001         // via non-const self pointer instead of const this one
1002         wxDocManager * const self = const_cast<wxDocManager *>(this);
1003
1004         // first try to reuse the directory of the most recently opened file:
1005         // this ensures that if the user opens a file, closes the program and
1006         // runs it again the "Open file" dialog will open in the directory of
1007         // the last file he used
1008         if ( m_fileHistory && m_fileHistory->GetCount() )
1009         {
1010             const wxString lastOpened = m_fileHistory->GetHistoryFile(0);
1011             const wxFileName fn(lastOpened);
1012             if ( fn.DirExists() )
1013             {
1014                 self->m_lastDirectory = fn.GetPath();
1015             }
1016             //else: should we try the next one?
1017         }
1018         //else: no history yet
1019
1020         // if we don't have any files in the history (yet?), use the
1021         // system-dependent default location for the document files
1022         if ( m_lastDirectory.empty() )
1023         {
1024             self->m_lastDirectory = wxStandardPaths::Get().GetAppDocumentsDir();
1025         }
1026     }
1027
1028     return m_lastDirectory;
1029 }
1030
1031 wxFileHistory *wxDocManager::OnCreateFileHistory()
1032 {
1033     return new wxFileHistory;
1034 }
1035
1036 void wxDocManager::OnFileClose(wxCommandEvent& WXUNUSED(event))
1037 {
1038     wxDocument *doc = GetCurrentDocument();
1039     if (doc)
1040         CloseDocument(doc);
1041 }
1042
1043 void wxDocManager::OnFileCloseAll(wxCommandEvent& WXUNUSED(event))
1044 {
1045     CloseDocuments(false);
1046 }
1047
1048 void wxDocManager::OnFileNew(wxCommandEvent& WXUNUSED(event))
1049 {
1050     CreateNewDocument();
1051 }
1052
1053 void wxDocManager::OnFileOpen(wxCommandEvent& WXUNUSED(event))
1054 {
1055     if ( !CreateDocument("") )
1056     {
1057         OnOpenFileFailure();
1058     }
1059 }
1060
1061 void wxDocManager::OnFileRevert(wxCommandEvent& WXUNUSED(event))
1062 {
1063     wxDocument *doc = GetCurrentDocument();
1064     if (!doc)
1065         return;
1066     doc->Revert();
1067 }
1068
1069 void wxDocManager::OnFileSave(wxCommandEvent& WXUNUSED(event))
1070 {
1071     wxDocument *doc = GetCurrentDocument();
1072     if (!doc)
1073         return;
1074     doc->Save();
1075 }
1076
1077 void wxDocManager::OnFileSaveAs(wxCommandEvent& WXUNUSED(event))
1078 {
1079     wxDocument *doc = GetCurrentDocument();
1080     if (!doc)
1081         return;
1082     doc->SaveAs();
1083 }
1084
1085 void wxDocManager::OnMRUFile(wxCommandEvent& event)
1086 {
1087     // Check if the id is in the range assigned to MRU list entries.
1088     const int id = event.GetId();
1089     if ( id >= wxID_FILE1 &&
1090             id < wxID_FILE1 + static_cast<int>(m_fileHistory->GetCount()) )
1091     {
1092         DoOpenMRUFile(id - wxID_FILE1);
1093     }
1094     else
1095     {
1096         event.Skip();
1097     }
1098 }
1099
1100 void wxDocManager::DoOpenMRUFile(unsigned n)
1101 {
1102     wxString filename(GetHistoryFile(n));
1103     if ( filename.empty() )
1104         return;
1105
1106     wxString errMsg; // must contain exactly one "%s" if non-empty
1107     if ( wxFile::Exists(filename) )
1108     {
1109         // try to open it
1110         if ( CreateDocument(filename, wxDOC_SILENT) )
1111             return;
1112
1113         errMsg = _("The file '%s' couldn't be opened.");
1114     }
1115     else // file doesn't exist
1116     {
1117         errMsg = _("The file '%s' doesn't exist and couldn't be opened.");
1118     }
1119
1120
1121     wxASSERT_MSG( !errMsg.empty(), "should have an error message" );
1122
1123     // remove the file which we can't open from the MRU list
1124     RemoveFileFromHistory(n);
1125
1126     // and tell the user about it
1127     wxLogError(errMsg + '\n' +
1128                _("It has been removed from the most recently used files list."),
1129                filename);
1130 }
1131
1132 #if wxUSE_PRINTING_ARCHITECTURE
1133
1134 void wxDocManager::OnPrint(wxCommandEvent& WXUNUSED(event))
1135 {
1136     wxView *view = GetActiveView();
1137     if (!view)
1138         return;
1139
1140     wxPrintout *printout = view->OnCreatePrintout();
1141     if (printout)
1142     {
1143         wxPrintDialogData printDialogData(m_pageSetupDialogData.GetPrintData());
1144         wxPrinter printer(&printDialogData);
1145         printer.Print(view->GetFrame(), printout, true);
1146
1147         delete printout;
1148     }
1149 }
1150
1151 void wxDocManager::OnPageSetup(wxCommandEvent& WXUNUSED(event))
1152 {
1153     wxPageSetupDialog dlg(wxTheApp->GetTopWindow(), &m_pageSetupDialogData);
1154     if ( dlg.ShowModal() == wxID_OK )
1155     {
1156         m_pageSetupDialogData = dlg.GetPageSetupData();
1157     }
1158 }
1159
1160 wxPreviewFrame* wxDocManager::CreatePreviewFrame(wxPrintPreviewBase* preview,
1161                                                  wxWindow *parent,
1162                                                  const wxString& title)
1163 {
1164     return new wxPreviewFrame(preview, parent, title);
1165 }
1166
1167 void wxDocManager::OnPreview(wxCommandEvent& WXUNUSED(event))
1168 {
1169     wxBusyCursor busy;
1170     wxView *view = GetActiveView();
1171     if (!view)
1172         return;
1173
1174     wxPrintout *printout = view->OnCreatePrintout();
1175     if (printout)
1176     {
1177         wxPrintDialogData printDialogData(m_pageSetupDialogData.GetPrintData());
1178
1179         // Pass two printout objects: for preview, and possible printing.
1180         wxPrintPreviewBase *
1181             preview = new wxPrintPreview(printout,
1182                                          view->OnCreatePrintout(),
1183                                          &printDialogData);
1184         if ( !preview->Ok() )
1185         {
1186             delete preview;
1187             wxLogError(_("Print preview creation failed."));
1188             return;
1189         }
1190
1191         wxPreviewFrame* frame = CreatePreviewFrame(preview,
1192                                                    wxTheApp->GetTopWindow(),
1193                                                    _("Print Preview"));
1194         wxCHECK_RET( frame, "should create a print preview frame" );
1195
1196         frame->Centre(wxBOTH);
1197         frame->Initialize();
1198         frame->Show(true);
1199     }
1200 }
1201 #endif // wxUSE_PRINTING_ARCHITECTURE
1202
1203 void wxDocManager::OnUndo(wxCommandEvent& event)
1204 {
1205     wxCommandProcessor * const cmdproc = GetCurrentCommandProcessor();
1206     if ( !cmdproc )
1207     {
1208         event.Skip();
1209         return;
1210     }
1211
1212     cmdproc->Undo();
1213 }
1214
1215 void wxDocManager::OnRedo(wxCommandEvent& event)
1216 {
1217     wxCommandProcessor * const cmdproc = GetCurrentCommandProcessor();
1218     if ( !cmdproc )
1219     {
1220         event.Skip();
1221         return;
1222     }
1223
1224     cmdproc->Redo();
1225 }
1226
1227 // Handlers for UI update commands
1228
1229 void wxDocManager::OnUpdateFileOpen(wxUpdateUIEvent& event)
1230 {
1231     // CreateDocument() (which is called from OnFileOpen) may succeed
1232     // only when there is at least a template:
1233     event.Enable( GetTemplates().GetCount()>0 );
1234 }
1235
1236 void wxDocManager::OnUpdateDisableIfNoDoc(wxUpdateUIEvent& event)
1237 {
1238     event.Enable( GetCurrentDocument() != NULL );
1239 }
1240
1241 void wxDocManager::OnUpdateFileRevert(wxUpdateUIEvent& event)
1242 {
1243     wxDocument* doc = GetCurrentDocument();
1244     event.Enable(doc && doc->IsModified() && doc->GetDocumentSaved());
1245 }
1246
1247 void wxDocManager::OnUpdateFileNew(wxUpdateUIEvent& event)
1248 {
1249     // CreateDocument() (which is called from OnFileNew) may succeed
1250     // only when there is at least a template:
1251     event.Enable( GetTemplates().GetCount()>0 );
1252 }
1253
1254 void wxDocManager::OnUpdateFileSave(wxUpdateUIEvent& event)
1255 {
1256     wxDocument * const doc = GetCurrentDocument();
1257     event.Enable( doc && !doc->AlreadySaved() );
1258 }
1259
1260 void wxDocManager::OnUpdateUndo(wxUpdateUIEvent& event)
1261 {
1262     wxCommandProcessor * const cmdproc = GetCurrentCommandProcessor();
1263     if ( !cmdproc )
1264     {
1265         event.Enable(false);
1266         return;
1267     }
1268
1269     event.Enable(cmdproc->CanUndo());
1270     cmdproc->SetMenuStrings();
1271 }
1272
1273 void wxDocManager::OnUpdateRedo(wxUpdateUIEvent& event)
1274 {
1275     wxCommandProcessor * const cmdproc = GetCurrentCommandProcessor();
1276     if ( !cmdproc )
1277     {
1278         event.Enable(false);
1279         return;
1280     }
1281
1282     event.Enable(cmdproc->CanRedo());
1283     cmdproc->SetMenuStrings();
1284 }
1285
1286 wxView *wxDocManager::GetActiveView() const
1287 {
1288     wxView *view = GetCurrentView();
1289
1290     if ( !view && !m_docs.empty() )
1291     {
1292         // if we have exactly one document, consider its view to be the current
1293         // one
1294         //
1295         // VZ: I'm not exactly sure why is this needed but this is how this
1296         //     code used to behave before the bug #9518 was fixed and it seems
1297         //     safer to preserve the old logic
1298         wxList::compatibility_iterator node = m_docs.GetFirst();
1299         if ( !node->GetNext() )
1300         {
1301             wxDocument *doc = static_cast<wxDocument *>(node->GetData());
1302             view = doc->GetFirstView();
1303         }
1304         //else: we have more than one document
1305     }
1306
1307     return view;
1308 }
1309
1310 bool wxDocManager::TryBefore(wxEvent& event)
1311 {
1312     wxView * const view = GetActiveView();
1313     return view && view->ProcessEventLocally(event);
1314 }
1315
1316 namespace
1317 {
1318
1319 // helper function: return only the visible templates
1320 wxDocTemplates GetVisibleTemplates(const wxList& allTemplates)
1321 {
1322     // select only the visible templates
1323     const size_t totalNumTemplates = allTemplates.GetCount();
1324     wxDocTemplates templates;
1325     if ( totalNumTemplates )
1326     {
1327         templates.reserve(totalNumTemplates);
1328
1329         for ( wxList::const_iterator i = allTemplates.begin(),
1330                                    end = allTemplates.end();
1331               i != end;
1332               ++i )
1333         {
1334             wxDocTemplate * const temp = (wxDocTemplate *)*i;
1335             if ( temp->IsVisible() )
1336                 templates.push_back(temp);
1337         }
1338     }
1339
1340     return templates;
1341 }
1342
1343 } // anonymous namespace
1344
1345 void wxDocManager::ActivateDocument(wxDocument *doc)
1346 {
1347     wxView * const view = doc->GetFirstView();
1348     if ( !view )
1349         return;
1350
1351     view->Activate(true);
1352     if ( wxWindow *win = view->GetFrame() )
1353         win->SetFocus();
1354 }
1355
1356 wxDocument *wxDocManager::CreateDocument(const wxString& pathOrig, long flags)
1357 {
1358     // this ought to be const but SelectDocumentType/Path() are not
1359     // const-correct and can't be changed as, being virtual, this risks
1360     // breaking user code overriding them
1361     wxDocTemplates templates(GetVisibleTemplates(m_templates));
1362     const size_t numTemplates = templates.size();
1363     if ( !numTemplates )
1364     {
1365         // no templates can be used, can't create document
1366         return NULL;
1367     }
1368
1369
1370     // normally user should select the template to use but wxDOC_SILENT flag we
1371     // choose one ourselves
1372     wxString path = pathOrig;   // may be modified below
1373     wxDocTemplate *temp;
1374     if ( flags & wxDOC_SILENT )
1375     {
1376         wxASSERT_MSG( !path.empty(),
1377                       "using empty path with wxDOC_SILENT doesn't make sense" );
1378
1379         temp = FindTemplateForPath(path);
1380         if ( !temp )
1381         {
1382             wxLogWarning(_("The format of file '%s' couldn't be determined."),
1383                          path);
1384         }
1385     }
1386     else // not silent, ask the user
1387     {
1388         // for the new file we need just the template, for an existing one we
1389         // need the template and the path, unless it's already specified
1390         if ( (flags & wxDOC_NEW) || !path.empty() )
1391             temp = SelectDocumentType(&templates[0], numTemplates);
1392         else
1393             temp = SelectDocumentPath(&templates[0], numTemplates, path, flags);
1394     }
1395
1396     if ( !temp )
1397         return NULL;
1398
1399     // check whether the document with this path is already opened
1400     if ( !path.empty() )
1401     {
1402         const wxFileName fn(path);
1403         for ( wxList::const_iterator i = m_docs.begin(); i != m_docs.end(); ++i )
1404         {
1405             wxDocument * const doc = (wxDocument*)*i;
1406
1407             if ( fn == doc->GetFilename() )
1408             {
1409                 // file already open, just activate it and return
1410                 ActivateDocument(doc);
1411                 return doc;
1412             }
1413         }
1414     }
1415
1416
1417     // no, we need to create a new document
1418
1419
1420     // if we've reached the max number of docs, close the first one.
1421     if ( (int)GetDocuments().GetCount() >= m_maxDocsOpen )
1422     {
1423         if ( !CloseDocument((wxDocument *)GetDocuments().GetFirst()->GetData()) )
1424         {
1425             // can't open the new document if closing the old one failed
1426             return NULL;
1427         }
1428     }
1429
1430
1431     // do create and initialize the new document finally
1432     wxDocument * const docNew = temp->CreateDocument(path, flags);
1433     if ( !docNew )
1434         return NULL;
1435
1436     docNew->SetDocumentName(temp->GetDocumentName());
1437     docNew->SetDocumentTemplate(temp);
1438
1439     wxTRY
1440     {
1441         // call the appropriate function depending on whether we're creating a
1442         // new file or opening an existing one
1443         if ( !(flags & wxDOC_NEW ? docNew->OnNewDocument()
1444                                  : docNew->OnOpenDocument(path)) )
1445         {
1446             docNew->DeleteAllViews();
1447             return NULL;
1448         }
1449     }
1450     wxCATCH_ALL( docNew->DeleteAllViews(); throw; )
1451
1452     // add the successfully opened file to MRU, but only if we're going to be
1453     // able to reopen it successfully later which requires the template for
1454     // this document to be retrievable from the file extension
1455     if ( !(flags & wxDOC_NEW) && temp->FileMatchesTemplate(path) )
1456         AddFileToHistory(path);
1457
1458     // at least under Mac (where views are top level windows) it seems to be
1459     // necessary to manually activate the new document to bring it to the
1460     // forefront -- and it shouldn't hurt doing this under the other platforms
1461     ActivateDocument(docNew);
1462
1463     return docNew;
1464 }
1465
1466 wxView *wxDocManager::CreateView(wxDocument *doc, long flags)
1467 {
1468     wxDocTemplates templates(GetVisibleTemplates(m_templates));
1469     const size_t numTemplates = templates.size();
1470
1471     if ( numTemplates == 0 )
1472         return NULL;
1473
1474     wxDocTemplate * const
1475     temp = numTemplates == 1 ? templates[0]
1476                              : SelectViewType(&templates[0], numTemplates);
1477
1478     if ( !temp )
1479         return NULL;
1480
1481     wxView *view = temp->CreateView(doc, flags);
1482     if ( view )
1483         view->SetViewName(temp->GetViewName());
1484     return view;
1485 }
1486
1487 // Not yet implemented
1488 void
1489 wxDocManager::DeleteTemplate(wxDocTemplate *WXUNUSED(temp), long WXUNUSED(flags))
1490 {
1491 }
1492
1493 // Not yet implemented
1494 bool wxDocManager::FlushDoc(wxDocument *WXUNUSED(doc))
1495 {
1496     return false;
1497 }
1498
1499 wxDocument *wxDocManager::GetCurrentDocument() const
1500 {
1501     wxView * const view = GetActiveView();
1502     return view ? view->GetDocument() : NULL;
1503 }
1504
1505 wxCommandProcessor *wxDocManager::GetCurrentCommandProcessor() const
1506 {
1507     wxDocument * const doc = GetCurrentDocument();
1508     return doc ? doc->GetCommandProcessor() : NULL;
1509 }
1510
1511 // Make a default name for a new document
1512 #if WXWIN_COMPATIBILITY_2_8
1513 bool wxDocManager::MakeDefaultName(wxString& WXUNUSED(name))
1514 {
1515     // we consider that this function can only be overridden by the user code,
1516     // not called by it as it only makes sense to call it internally, so we
1517     // don't bother to return anything from here
1518     return false;
1519 }
1520 #endif // WXWIN_COMPATIBILITY_2_8
1521
1522 wxString wxDocManager::MakeNewDocumentName()
1523 {
1524     wxString name;
1525
1526 #if WXWIN_COMPATIBILITY_2_8
1527     if ( !MakeDefaultName(name) )
1528 #endif // WXWIN_COMPATIBILITY_2_8
1529     {
1530         name.Printf(_("unnamed%d"), m_defaultDocumentNameCounter);
1531         m_defaultDocumentNameCounter++;
1532     }
1533
1534     return name;
1535 }
1536
1537 // Make a frame title (override this to do something different)
1538 // If docName is empty, a document is not currently active.
1539 wxString wxDocManager::MakeFrameTitle(wxDocument* doc)
1540 {
1541     wxString appName = wxTheApp->GetAppDisplayName();
1542     wxString title;
1543     if (!doc)
1544         title = appName;
1545     else
1546     {
1547         wxString docName = doc->GetUserReadableName();
1548         title = docName + wxString(_(" - ")) + appName;
1549     }
1550     return title;
1551 }
1552
1553
1554 // Not yet implemented
1555 wxDocTemplate *wxDocManager::MatchTemplate(const wxString& WXUNUSED(path))
1556 {
1557     return NULL;
1558 }
1559
1560 // File history management
1561 void wxDocManager::AddFileToHistory(const wxString& file)
1562 {
1563     if (m_fileHistory)
1564         m_fileHistory->AddFileToHistory(file);
1565 }
1566
1567 void wxDocManager::RemoveFileFromHistory(size_t i)
1568 {
1569     if (m_fileHistory)
1570         m_fileHistory->RemoveFileFromHistory(i);
1571 }
1572
1573 wxString wxDocManager::GetHistoryFile(size_t i) const
1574 {
1575     wxString histFile;
1576
1577     if (m_fileHistory)
1578         histFile = m_fileHistory->GetHistoryFile(i);
1579
1580     return histFile;
1581 }
1582
1583 void wxDocManager::FileHistoryUseMenu(wxMenu *menu)
1584 {
1585     if (m_fileHistory)
1586         m_fileHistory->UseMenu(menu);
1587 }
1588
1589 void wxDocManager::FileHistoryRemoveMenu(wxMenu *menu)
1590 {
1591     if (m_fileHistory)
1592         m_fileHistory->RemoveMenu(menu);
1593 }
1594
1595 #if wxUSE_CONFIG
1596 void wxDocManager::FileHistoryLoad(const wxConfigBase& config)
1597 {
1598     if (m_fileHistory)
1599         m_fileHistory->Load(config);
1600 }
1601
1602 void wxDocManager::FileHistorySave(wxConfigBase& config)
1603 {
1604     if (m_fileHistory)
1605         m_fileHistory->Save(config);
1606 }
1607 #endif
1608
1609 void wxDocManager::FileHistoryAddFilesToMenu(wxMenu* menu)
1610 {
1611     if (m_fileHistory)
1612         m_fileHistory->AddFilesToMenu(menu);
1613 }
1614
1615 void wxDocManager::FileHistoryAddFilesToMenu()
1616 {
1617     if (m_fileHistory)
1618         m_fileHistory->AddFilesToMenu();
1619 }
1620
1621 size_t wxDocManager::GetHistoryFilesCount() const
1622 {
1623     return m_fileHistory ? m_fileHistory->GetCount() : 0;
1624 }
1625
1626
1627 // Find out the document template via matching in the document file format
1628 // against that of the template
1629 wxDocTemplate *wxDocManager::FindTemplateForPath(const wxString& path)
1630 {
1631     wxDocTemplate *theTemplate = NULL;
1632
1633     // Find the template which this extension corresponds to
1634     for (size_t i = 0; i < m_templates.GetCount(); i++)
1635     {
1636         wxDocTemplate *temp = (wxDocTemplate *)m_templates.Item(i)->GetData();
1637         if ( temp->FileMatchesTemplate(path) )
1638         {
1639             theTemplate = temp;
1640             break;
1641         }
1642     }
1643     return theTemplate;
1644 }
1645
1646 // Prompts user to open a file, using file specs in templates.
1647 // Must extend the file selector dialog or implement own; OR
1648 // match the extension to the template extension.
1649
1650 wxDocTemplate *wxDocManager::SelectDocumentPath(wxDocTemplate **templates,
1651                                                 int noTemplates,
1652                                                 wxString& path,
1653                                                 long WXUNUSED(flags),
1654                                                 bool WXUNUSED(save))
1655 {
1656 #ifdef wxHAS_MULTIPLE_FILEDLG_FILTERS
1657     wxString descrBuf;
1658
1659     for (int i = 0; i < noTemplates; i++)
1660     {
1661         if (templates[i]->IsVisible())
1662         {
1663             // add a '|' to separate this filter from the previous one
1664             if ( !descrBuf.empty() )
1665                 descrBuf << wxT('|');
1666
1667             descrBuf << templates[i]->GetDescription()
1668                 << wxT(" (") << templates[i]->GetFileFilter() << wxT(") |")
1669                 << templates[i]->GetFileFilter();
1670         }
1671     }
1672 #else
1673     wxString descrBuf = wxT("*.*");
1674     wxUnusedVar(noTemplates);
1675 #endif
1676
1677     int FilterIndex = -1;
1678
1679     wxString pathTmp = wxFileSelectorEx(_("Open File"),
1680                                         GetLastDirectory(),
1681                                         wxEmptyString,
1682                                         &FilterIndex,
1683                                         descrBuf,
1684                                         wxFD_OPEN | wxFD_FILE_MUST_EXIST);
1685
1686     wxDocTemplate *theTemplate = NULL;
1687     if (!pathTmp.empty())
1688     {
1689         if (!wxFileExists(pathTmp))
1690         {
1691             wxString msgTitle;
1692             if (!wxTheApp->GetAppDisplayName().empty())
1693                 msgTitle = wxTheApp->GetAppDisplayName();
1694             else
1695                 msgTitle = wxString(_("File error"));
1696
1697             wxMessageBox(_("Sorry, could not open this file."),
1698                          msgTitle,
1699                          wxOK | wxICON_EXCLAMATION | wxCENTRE);
1700
1701             path = wxEmptyString;
1702             return NULL;
1703         }
1704
1705         SetLastDirectory(wxPathOnly(pathTmp));
1706
1707         path = pathTmp;
1708
1709         // first choose the template using the extension, if this fails (i.e.
1710         // wxFileSelectorEx() didn't fill it), then use the path
1711         if ( FilterIndex != -1 )
1712             theTemplate = templates[FilterIndex];
1713         if ( !theTemplate )
1714             theTemplate = FindTemplateForPath(path);
1715         if ( !theTemplate )
1716         {
1717             // Since we do not add files with non-default extensions to the
1718             // file history this can only happen if the application changes the
1719             // allowed templates in runtime.
1720             wxMessageBox(_("Sorry, the format for this file is unknown."),
1721                          _("Open File"),
1722                          wxOK | wxICON_EXCLAMATION | wxCENTRE);
1723         }
1724     }
1725     else
1726     {
1727         path.clear();
1728     }
1729
1730     return theTemplate;
1731 }
1732
1733 wxDocTemplate *wxDocManager::SelectDocumentType(wxDocTemplate **templates,
1734                                                 int noTemplates, bool sort)
1735 {
1736     wxArrayString strings;
1737     wxScopedArray<wxDocTemplate *> data(new wxDocTemplate *[noTemplates]);
1738     int i;
1739     int n = 0;
1740
1741     for (i = 0; i < noTemplates; i++)
1742     {
1743         if (templates[i]->IsVisible())
1744         {
1745             int j;
1746             bool want = true;
1747             for (j = 0; j < n; j++)
1748             {
1749                 //filter out NOT unique documents + view combinations
1750                 if ( templates[i]->m_docTypeName == data[j]->m_docTypeName &&
1751                      templates[i]->m_viewTypeName == data[j]->m_viewTypeName
1752                    )
1753                     want = false;
1754             }
1755
1756             if ( want )
1757             {
1758                 strings.Add(templates[i]->m_description);
1759
1760                 data[n] = templates[i];
1761                 n ++;
1762             }
1763         }
1764     }  // for
1765
1766     if (sort)
1767     {
1768         strings.Sort(); // ascending sort
1769         // Yes, this will be slow, but template lists
1770         // are typically short.
1771         int j;
1772         n = strings.Count();
1773         for (i = 0; i < n; i++)
1774         {
1775             for (j = 0; j < noTemplates; j++)
1776             {
1777                 if (strings[i] == templates[j]->m_description)
1778                     data[i] = templates[j];
1779             }
1780         }
1781     }
1782
1783     wxDocTemplate *theTemplate;
1784
1785     switch ( n )
1786     {
1787         case 0:
1788             // no visible templates, hence nothing to choose from
1789             theTemplate = NULL;
1790             break;
1791
1792         case 1:
1793             // don't propose the user to choose if he has no choice
1794             theTemplate = data[0];
1795             break;
1796
1797         default:
1798             // propose the user to choose one of several
1799             theTemplate = (wxDocTemplate *)wxGetSingleChoiceData
1800                           (
1801                             _("Select a document template"),
1802                             _("Templates"),
1803                             strings,
1804                             (void **)data.get()
1805                           );
1806     }
1807
1808     return theTemplate;
1809 }
1810
1811 wxDocTemplate *wxDocManager::SelectViewType(wxDocTemplate **templates,
1812                                             int noTemplates, bool sort)
1813 {
1814     wxArrayString strings;
1815     wxScopedArray<wxDocTemplate *> data(new wxDocTemplate *[noTemplates]);
1816     int i;
1817     int n = 0;
1818
1819     for (i = 0; i < noTemplates; i++)
1820     {
1821         wxDocTemplate *templ = templates[i];
1822         if ( templ->IsVisible() && !templ->GetViewName().empty() )
1823         {
1824             int j;
1825             bool want = true;
1826             for (j = 0; j < n; j++)
1827             {
1828                 //filter out NOT unique views
1829                 if ( templates[i]->m_viewTypeName == data[j]->m_viewTypeName )
1830                     want = false;
1831             }
1832
1833             if ( want )
1834             {
1835                 strings.Add(templ->m_viewTypeName);
1836                 data[n] = templ;
1837                 n ++;
1838             }
1839         }
1840     }
1841
1842     if (sort)
1843     {
1844         strings.Sort(); // ascending sort
1845         // Yes, this will be slow, but template lists
1846         // are typically short.
1847         int j;
1848         n = strings.Count();
1849         for (i = 0; i < n; i++)
1850         {
1851             for (j = 0; j < noTemplates; j++)
1852             {
1853                 if (strings[i] == templates[j]->m_viewTypeName)
1854                     data[i] = templates[j];
1855             }
1856         }
1857     }
1858
1859     wxDocTemplate *theTemplate;
1860
1861     // the same logic as above
1862     switch ( n )
1863     {
1864         case 0:
1865             theTemplate = NULL;
1866             break;
1867
1868         case 1:
1869             theTemplate = data[0];
1870             break;
1871
1872         default:
1873             theTemplate = (wxDocTemplate *)wxGetSingleChoiceData
1874                           (
1875                             _("Select a document view"),
1876                             _("Views"),
1877                             strings,
1878                             (void **)data.get()
1879                           );
1880
1881     }
1882
1883     return theTemplate;
1884 }
1885
1886 void wxDocManager::AssociateTemplate(wxDocTemplate *temp)
1887 {
1888     if (!m_templates.Member(temp))
1889         m_templates.Append(temp);
1890 }
1891
1892 void wxDocManager::DisassociateTemplate(wxDocTemplate *temp)
1893 {
1894     m_templates.DeleteObject(temp);
1895 }
1896
1897 wxDocTemplate* wxDocManager::FindTemplate(const wxClassInfo* classinfo)
1898 {
1899    for ( wxList::compatibility_iterator node = m_templates.GetFirst();
1900          node;
1901          node = node->GetNext() )
1902    {
1903       wxDocTemplate* t = wxStaticCast(node->GetData(), wxDocTemplate);
1904       if ( t->GetDocClassInfo() == classinfo )
1905          return t;
1906    }
1907
1908    return NULL;
1909 }
1910
1911 // Add and remove a document from the manager's list
1912 void wxDocManager::AddDocument(wxDocument *doc)
1913 {
1914     if (!m_docs.Member(doc))
1915         m_docs.Append(doc);
1916 }
1917
1918 void wxDocManager::RemoveDocument(wxDocument *doc)
1919 {
1920     m_docs.DeleteObject(doc);
1921 }
1922
1923 // Views or windows should inform the document manager
1924 // when a view is going in or out of focus
1925 void wxDocManager::ActivateView(wxView *view, bool activate)
1926 {
1927     if ( activate )
1928     {
1929         m_currentView = view;
1930     }
1931     else // deactivate
1932     {
1933         if ( m_currentView == view )
1934         {
1935             // don't keep stale pointer
1936             m_currentView = NULL;
1937         }
1938     }
1939 }
1940
1941 // ----------------------------------------------------------------------------
1942 // wxDocChildFrameAnyBase
1943 // ----------------------------------------------------------------------------
1944
1945 bool wxDocChildFrameAnyBase::CloseView(wxCloseEvent& event)
1946 {
1947     if ( m_childView )
1948     {
1949         // notice that we must call wxView::Close() and OnClose() called from
1950         // it in any case, even if we know that we are going to close anyhow
1951         if ( !m_childView->Close(false) && event.CanVeto() )
1952         {
1953             event.Veto();
1954             return false;
1955         }
1956
1957         m_childView->Activate(false);
1958
1959         // it is important to reset m_childView frame pointer to NULL before
1960         // deleting it because while normally it is the frame which deletes the
1961         // view when it's closed, the view also closes the frame if it is
1962         // deleted directly not by us as indicated by its doc child frame
1963         // pointer still being set
1964         m_childView->SetDocChildFrame(NULL);
1965         wxDELETE(m_childView);
1966     }
1967
1968     m_childDocument = NULL;
1969
1970     return true;
1971 }
1972
1973 // ----------------------------------------------------------------------------
1974 // wxDocParentFrameAnyBase
1975 // ----------------------------------------------------------------------------
1976
1977 #if wxUSE_PRINTING_ARCHITECTURE
1978
1979 namespace
1980 {
1981
1982 wxString GetAppropriateTitle(const wxView *view, const wxString& titleGiven)
1983 {
1984     wxString title(titleGiven);
1985     if ( title.empty() )
1986     {
1987         if ( view && view->GetDocument() )
1988             title = view->GetDocument()->GetUserReadableName();
1989         else
1990             title = _("Printout");
1991     }
1992
1993     return title;
1994 }
1995
1996 } // anonymous namespace
1997
1998 wxDocPrintout::wxDocPrintout(wxView *view, const wxString& title)
1999              : wxPrintout(GetAppropriateTitle(view, title))
2000 {
2001     m_printoutView = view;
2002 }
2003
2004 bool wxDocPrintout::OnPrintPage(int WXUNUSED(page))
2005 {
2006     wxDC *dc = GetDC();
2007
2008     // Get the logical pixels per inch of screen and printer
2009     int ppiScreenX, ppiScreenY;
2010     GetPPIScreen(&ppiScreenX, &ppiScreenY);
2011     wxUnusedVar(ppiScreenY);
2012     int ppiPrinterX, ppiPrinterY;
2013     GetPPIPrinter(&ppiPrinterX, &ppiPrinterY);
2014     wxUnusedVar(ppiPrinterY);
2015
2016     // This scales the DC so that the printout roughly represents the
2017     // the screen scaling. The text point size _should_ be the right size
2018     // but in fact is too small for some reason. This is a detail that will
2019     // need to be addressed at some point but can be fudged for the
2020     // moment.
2021     float scale = (float)((float)ppiPrinterX/(float)ppiScreenX);
2022
2023     // Now we have to check in case our real page size is reduced
2024     // (e.g. because we're drawing to a print preview memory DC)
2025     int pageWidth, pageHeight;
2026     int w, h;
2027     dc->GetSize(&w, &h);
2028     GetPageSizePixels(&pageWidth, &pageHeight);
2029     wxUnusedVar(pageHeight);
2030
2031     // If printer pageWidth == current DC width, then this doesn't
2032     // change. But w might be the preview bitmap width, so scale down.
2033     float overallScale = scale * (float)(w/(float)pageWidth);
2034     dc->SetUserScale(overallScale, overallScale);
2035
2036     if (m_printoutView)
2037     {
2038         m_printoutView->OnDraw(dc);
2039     }
2040     return true;
2041 }
2042
2043 bool wxDocPrintout::HasPage(int pageNum)
2044 {
2045     return (pageNum == 1);
2046 }
2047
2048 bool wxDocPrintout::OnBeginDocument(int startPage, int endPage)
2049 {
2050     if (!wxPrintout::OnBeginDocument(startPage, endPage))
2051         return false;
2052
2053     return true;
2054 }
2055
2056 void wxDocPrintout::GetPageInfo(int *minPage, int *maxPage,
2057                                 int *selPageFrom, int *selPageTo)
2058 {
2059     *minPage = 1;
2060     *maxPage = 1;
2061     *selPageFrom = 1;
2062     *selPageTo = 1;
2063 }
2064
2065 #endif // wxUSE_PRINTING_ARCHITECTURE
2066
2067 // ----------------------------------------------------------------------------
2068 // Permits compatibility with existing file formats and functions that
2069 // manipulate files directly
2070 // ----------------------------------------------------------------------------
2071
2072 #if wxUSE_STD_IOSTREAM
2073
2074 bool wxTransferFileToStream(const wxString& filename, wxSTD ostream& stream)
2075 {
2076 #if wxUSE_FFILE
2077     wxFFile file(filename, wxT("rb"));
2078 #elif wxUSE_FILE
2079     wxFile file(filename, wxFile::read);
2080 #endif
2081     if ( !file.IsOpened() )
2082         return false;
2083
2084     char buf[4096];
2085
2086     size_t nRead;
2087     do
2088     {
2089         nRead = file.Read(buf, WXSIZEOF(buf));
2090         if ( file.Error() )
2091             return false;
2092
2093         stream.write(buf, nRead);
2094         if ( !stream )
2095             return false;
2096     }
2097     while ( !file.Eof() );
2098
2099     return true;
2100 }
2101
2102 bool wxTransferStreamToFile(wxSTD istream& stream, const wxString& filename)
2103 {
2104 #if wxUSE_FFILE
2105     wxFFile file(filename, wxT("wb"));
2106 #elif wxUSE_FILE
2107     wxFile file(filename, wxFile::write);
2108 #endif
2109     if ( !file.IsOpened() )
2110         return false;
2111
2112     char buf[4096];
2113     do
2114     {
2115         stream.read(buf, WXSIZEOF(buf));
2116         if ( !stream.bad() ) // fail may be set on EOF, don't use operator!()
2117         {
2118             if ( !file.Write(buf, stream.gcount()) )
2119                 return false;
2120         }
2121     }
2122     while ( !stream.eof() );
2123
2124     return true;
2125 }
2126
2127 #else // !wxUSE_STD_IOSTREAM
2128
2129 bool wxTransferFileToStream(const wxString& filename, wxOutputStream& stream)
2130 {
2131 #if wxUSE_FFILE
2132     wxFFile file(filename, wxT("rb"));
2133 #elif wxUSE_FILE
2134     wxFile file(filename, wxFile::read);
2135 #endif
2136     if ( !file.IsOpened() )
2137         return false;
2138
2139     char buf[4096];
2140
2141     size_t nRead;
2142     do
2143     {
2144         nRead = file.Read(buf, WXSIZEOF(buf));
2145         if ( file.Error() )
2146             return false;
2147
2148         stream.Write(buf, nRead);
2149         if ( !stream )
2150             return false;
2151     }
2152     while ( !file.Eof() );
2153
2154     return true;
2155 }
2156
2157 bool wxTransferStreamToFile(wxInputStream& stream, const wxString& filename)
2158 {
2159 #if wxUSE_FFILE
2160     wxFFile file(filename, wxT("wb"));
2161 #elif wxUSE_FILE
2162     wxFile file(filename, wxFile::write);
2163 #endif
2164     if ( !file.IsOpened() )
2165         return false;
2166
2167     char buf[4096];
2168     for ( ;; )
2169     {
2170         stream.Read(buf, WXSIZEOF(buf));
2171
2172         const size_t nRead = stream.LastRead();
2173         if ( !nRead )
2174         {
2175             if ( stream.Eof() )
2176                 break;
2177
2178             return false;
2179         }
2180
2181         if ( !file.Write(buf, nRead) )
2182             return false;
2183     }
2184
2185     return true;
2186 }
2187
2188 #endif // wxUSE_STD_IOSTREAM/!wxUSE_STD_IOSTREAM
2189
2190 #endif // wxUSE_DOC_VIEW_ARCHITECTURE