src/common/docview.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        docview.cpp
   3 // Purpose:     Document/view classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "docview.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/defs.h"
  25 #endif
  26
  27 #if wxUSE_DOC_VIEW_ARCHITECTURE
  28
  29 #ifndef WX_PRECOMP
  30 #include "wx/string.h"
  31 #include "wx/utils.h"
  32 #include "wx/app.h"
  33 #include "wx/dc.h"
  34 #include "wx/dialog.h"
  35 #include "wx/menu.h"
  36 #include "wx/list.h"
  37 #include "wx/filedlg.h"
  38 #include <wx/intl.h>
  39 #endif
  40
  41 #ifdef __WXGTK__
  42 #include "wx/mdi.h"
  43 #endif
  44
  45 #include "wx/msgdlg.h"
  46 #include "wx/choicdlg.h"
  47 #include "wx/docview.h"
  48 #include "wx/printdlg.h"
  49 #include "wx/confbase.h"
  50
  51 #include <stdio.h>
  52 #include <string.h>
  53
  54 #include "wx/ioswrap.h"
  55
  56 #if wxUSE_IOSTREAMH
  57     #include <fstream.h>
  58 #else
  59     #include <fstream>
  60 #endif
  61
  62 #if !USE_SHARED_LIBRARY
  63 IMPLEMENT_ABSTRACT_CLASS(wxDocument, wxEvtHandler)
  64 IMPLEMENT_ABSTRACT_CLASS(wxView, wxEvtHandler)
  65 IMPLEMENT_ABSTRACT_CLASS(wxDocTemplate, wxObject)
  66 IMPLEMENT_DYNAMIC_CLASS(wxDocManager, wxEvtHandler)
  67 IMPLEMENT_CLASS(wxDocChildFrame, wxFrame)
  68 IMPLEMENT_CLASS(wxDocParentFrame, wxFrame)
  69 #if wxUSE_PRINTING_ARCHITECTURE
  70 IMPLEMENT_DYNAMIC_CLASS(wxDocPrintout, wxPrintout)
  71 #endif
  72 IMPLEMENT_CLASS(wxCommand, wxObject)
  73 IMPLEMENT_DYNAMIC_CLASS(wxCommandProcessor, wxObject)
  74 IMPLEMENT_DYNAMIC_CLASS(wxFileHistory, wxObject)
  75 // IMPLEMENT_DYNAMIC_CLASS(wxPrintInfo, wxObject)
  76 #endif
  77
  78 /*
  79  * Definition of wxDocument
  80  */
  81
  82 wxDocument::wxDocument(wxDocument *parent)
  83 {
  84   m_documentModified=FALSE;
  85   m_documentFile="";
  86   m_documentTitle="";
  87   m_documentParent=parent;
  88   m_documentTemplate = (wxDocTemplate *) NULL;
  89   m_documentTypeName = "";
  90   m_savedYet = FALSE;
  91 }
  92
  93 bool wxDocument::DeleteContents(void)
  94 {
  95   return TRUE;
  96 }
  97
  98 wxDocument::~wxDocument(void)
  99 {
 100   DeleteContents();
 101
 102   if (m_commandProcessor)
 103     delete m_commandProcessor;
 104
 105   GetDocumentManager()->RemoveDocument(this);
 106
 107   // Not safe to do here, since it'll
 108   // invoke virtual view functions expecting to see
 109   // valid derived objects: and by the time we get
 110   // here, we've called destructors higher up.
 111 //  DeleteAllViews();
 112 }
 113
 114 bool wxDocument::Close(void)
 115 {
 116   if (OnSaveModified())
 117     return OnCloseDocument();
 118   else
 119     return FALSE;
 120 }
 121
 122 bool wxDocument::OnCloseDocument(void)
 123 {
 124   DeleteContents();
 125   Modify(FALSE);
 126   return TRUE;
 127 }
 128
 129 // Note that this implicitly deletes the document when
 130 // the last view is deleted.
 131 bool wxDocument::DeleteAllViews(void)
 132 {
 133   wxNode *node = m_documentViews.First();
 134   while (node)
 135   {
 136     wxView *view = (wxView *)node->Data();
 137     if (!view->Close())
 138       return FALSE;
 139
 140     wxNode *next = node->Next();
 141
 142     delete view; // Deletes node implicitly
 143     node = next;
 144   }
 145   return TRUE;
 146 }
 147
 148 wxView *wxDocument::GetFirstView(void) const
 149 {
 150   if (m_documentViews.Number() == 0)
 151     return (wxView *) NULL;
 152   return (wxView *)m_documentViews.First()->Data();
 153 }
 154
 155 wxDocManager *wxDocument::GetDocumentManager(void) const
 156 {
 157   return m_documentTemplate->GetDocumentManager();
 158 }
 159
 160 bool wxDocument::OnNewDocument(void)
 161 {
 162   if (!OnSaveModified())
 163     return FALSE;
 164
 165   if (OnCloseDocument()==FALSE) return FALSE;
 166   DeleteContents();
 167   Modify(FALSE);
 168   SetDocumentSaved(FALSE);
 169
 170   wxString name;
 171   GetDocumentManager()->MakeDefaultName(name);
 172   SetTitle(name);
 173   SetFilename(name, TRUE);
 174
 175   return TRUE;
 176 }
 177
 178 bool wxDocument::Save(void)
 179 {
 180   bool ret = FALSE;
 181
 182   if (!IsModified()) return TRUE;
 183   if (m_documentFile == "" || !m_savedYet)
 184     ret = SaveAs();
 185   else
 186     ret = OnSaveDocument(m_documentFile);
 187   if ( ret )
 188     SetDocumentSaved(TRUE);
 189   return ret;
 190 }
 191
 192 bool wxDocument::SaveAs(void)
 193 {
 194     wxDocTemplate *docTemplate = GetDocumentTemplate();
 195     if (!docTemplate)
 196         return FALSE;
 197
 198     wxString tmp = wxFileSelector(_("Save as"),
 199                                   docTemplate->GetDirectory(),
 200                                   GetFilename(),
 201                                   docTemplate->GetDefaultExtension(),
 202                                   docTemplate->GetFileFilter(),
 203                                   wxSAVE | wxOVERWRITE_PROMPT,
 204                                   GetDocumentWindow());
 205
 206     if (tmp.IsEmpty())
 207         return FALSE;
 208
 209     wxString fileName(tmp);
 210     wxString path("");
 211     wxString name("");
 212     wxString ext("");
 213     wxSplitPath(fileName, & path, & name, & ext);
 214
 215     if (ext.IsEmpty() || ext == "")
 216     {
 217         fileName += ".";
 218         fileName += docTemplate->GetDefaultExtension();
 219     }
 220
 221     SetFilename(fileName);
 222     SetTitle(wxFileNameFromPath(fileName));
 223
 224     GetDocumentManager()->AddFileToHistory(fileName);
 225
 226     // Notify the views that the filename has changed
 227     wxNode *node = m_documentViews.First();
 228     while (node)
 229     {
 230       wxView *view = (wxView *)node->Data();
 231       view->OnChangeFilename();
 232       node = node->Next();
 233     }
 234
 235     return OnSaveDocument(m_documentFile);
 236 }
 237
 238 bool wxDocument::OnSaveDocument(const wxString& file)
 239 {
 240   if (file == "")
 241     return FALSE;
 242
 243   wxString msgTitle;
 244   if (wxTheApp->GetAppName() != "")
 245     msgTitle = wxTheApp->GetAppName();
 246   else
 247     msgTitle = wxString(_("File error"));
 248
 249   ofstream store(file);
 250   if (store.fail() || store.bad())
 251   {
 252     (void)wxMessageBox(_("Sorry, could not open this file for saving."), msgTitle, wxOK | wxICON_EXCLAMATION,
 253       GetDocumentWindow());
 254     // Saving error
 255     return FALSE;
 256   }
 257   if (SaveObject(store)==FALSE)
 258   {
 259     (void)wxMessageBox(_("Sorry, could not save this file."), msgTitle, wxOK | wxICON_EXCLAMATION,
 260       GetDocumentWindow());
 261     // Saving error
 262     return FALSE;
 263   }
 264   Modify(FALSE);
 265   SetFilename(file);
 266   return TRUE;
 267 }
 268
 269 bool wxDocument::OnOpenDocument(const wxString& file)
 270 {
 271   if (!OnSaveModified())
 272     return FALSE;
 273
 274   wxString msgTitle;
 275   if (wxTheApp->GetAppName() != "")
 276     msgTitle = wxTheApp->GetAppName();
 277   else
 278     msgTitle = wxString(_("File error"));
 279
 280   ifstream store(file);
 281   if (store.fail() || store.bad())
 282   {
 283     (void)wxMessageBox(_("Sorry, could not open this file."), msgTitle, wxOK|wxICON_EXCLAMATION,
 284      GetDocumentWindow());
 285     return FALSE;
 286   }
 287   if (LoadObject(store)==FALSE)
 288   {
 289     (void)wxMessageBox(_("Sorry, could not open this file."), msgTitle, wxOK|wxICON_EXCLAMATION,
 290       GetDocumentWindow());
 291     return FALSE;
 292   }
 293   SetFilename(file, TRUE);
 294   Modify(FALSE);
 295   m_savedYet = TRUE;
 296
 297   UpdateAllViews();
 298
 299   return TRUE;
 300 }
 301
 302 istream& wxDocument::LoadObject(istream& stream)
 303 {
 304 //  wxObject::LoadObject(stream);
 305
 306   return stream;
 307 }
 308
 309 ostream& wxDocument::SaveObject(ostream& stream)
 310 {
 311 //  wxObject::SaveObject(stream);
 312
 313   return stream;
 314 }
 315
 316 bool wxDocument::Revert(void)
 317 {
 318   return FALSE;
 319 }
 320
 321
 322 // Get title, or filename if no title, else unnamed
 323 bool wxDocument::GetPrintableName(wxString& buf) const
 324 {
 325   if (m_documentTitle != "")
 326   {
 327     buf = m_documentTitle;
 328     return TRUE;
 329   }
 330   else if (m_documentFile != "")
 331   {
 332     buf = wxFileNameFromPath(m_documentFile);
 333     return TRUE;
 334   }
 335   else
 336   {
 337     buf = _("unnamed");
 338     return TRUE;
 339   }
 340 }
 341
 342 wxWindow *wxDocument::GetDocumentWindow(void) const
 343 {
 344   wxView *view = GetFirstView();
 345   if (view)
 346     return view->GetFrame();
 347   else
 348     return wxTheApp->GetTopWindow();
 349 }
 350
 351 wxCommandProcessor *wxDocument::OnCreateCommandProcessor(void)
 352 {
 353   return new wxCommandProcessor;
 354 }
 355
 356 // TRUE if safe to close
 357 bool wxDocument::OnSaveModified(void)
 358 {
 359   if (IsModified())
 360   {
 361     wxString title;
 362     GetPrintableName(title);
 363
 364     wxString msgTitle;
 365     if (wxTheApp->GetAppName() != "")
 366       msgTitle = wxTheApp->GetAppName();
 367     else
 368       msgTitle = wxString(_("Warning"));
 369
 370     wxString prompt;
 371     prompt.Printf(_("Do you want to save changes to document %s?"),
 372                   (const char *)title);
 373     int res = wxMessageBox(prompt, msgTitle,
 374                            wxYES_NO|wxCANCEL|wxICON_QUESTION,
 375                            GetDocumentWindow());
 376     if (res == wxNO)
 377     {
 378       Modify(FALSE);
 379       return TRUE;
 380     }
 381     else if (res == wxYES)
 382       return Save();
 383     else if (res == wxCANCEL)
 384       return FALSE;
 385   }
 386   return TRUE;
 387 }
 388
 389 bool wxDocument::Draw(wxDC& WXUNUSED(context))
 390 {
 391   return TRUE;
 392 }
 393
 394 bool wxDocument::AddView(wxView *view)
 395 {
 396   if (!m_documentViews.Member(view))
 397   {
 398     m_documentViews.Append(view);
 399     OnChangedViewList();
 400   }
 401   return TRUE;
 402 }
 403
 404 bool wxDocument::RemoveView(wxView *view)
 405 {
 406   (void)m_documentViews.DeleteObject(view);
 407   OnChangedViewList();
 408   return TRUE;
 409 }
 410
 411 bool wxDocument::OnCreate(const wxString& WXUNUSED(path), long flags)
 412 {
 413   if (GetDocumentTemplate()->CreateView(this, flags))
 414     return TRUE;
 415   else
 416     return FALSE;
 417 }
 418
 419 // Called after a view is added or removed.
 420 // The default implementation deletes the document if
 421 // there are no more views.
 422 void wxDocument::OnChangedViewList(void)
 423 {
 424   if (m_documentViews.Number() == 0)
 425   {
 426     if (OnSaveModified())
 427     {
 428       delete this;
 429     }
 430   }
 431 }
 432
 433 void wxDocument::UpdateAllViews(wxView *sender, wxObject *hint)
 434 {
 435   wxNode *node = m_documentViews.First();
 436   while (node)
 437   {
 438     wxView *view = (wxView *)node->Data();
 439     view->OnUpdate(sender, hint);
 440     node = node->Next();
 441   }
 442 }
 443
 444 void wxDocument::SetFilename(const wxString& filename, bool notifyViews)
 445 {
 446   m_documentFile = filename;
 447   if ( notifyViews )
 448   {
 449     // Notify the views that the filename has changed
 450     wxNode *node = m_documentViews.First();
 451     while (node)
 452     {
 453       wxView *view = (wxView *)node->Data();
 454       view->OnChangeFilename();
 455       node = node->Next();
 456     }
 457   }
 458 }
 459
 460
 461 /*
 462  * Document view
 463  */
 464
 465 wxView::wxView()
 466 {
 467 //  SetDocument(doc);
 468   m_viewDocument = (wxDocument*) NULL;
 469
 470   m_viewTypeName = "";
 471   m_viewFrame = (wxFrame *) NULL;
 472 }
 473
 474 wxView::~wxView(void)
 475 {
 476   GetDocumentManager()->ActivateView(this, FALSE, TRUE);
 477   m_viewDocument->RemoveView(this);
 478 }
 479
 480 // Extend event processing to search the document's event table
 481 bool wxView::ProcessEvent(wxEvent& event)
 482 {
 483         if ( !GetDocument() || !GetDocument()->ProcessEvent(event) )
 484                 return wxEvtHandler::ProcessEvent(event);
 485         else
 486                 return TRUE;
 487 }
 488
 489 void wxView::OnActivateView(bool WXUNUSED(activate), wxView *WXUNUSED(activeView), wxView *WXUNUSED(deactiveView))
 490 {
 491 }
 492
 493 void wxView::OnPrint(wxDC *dc, wxObject *WXUNUSED(info))
 494 {
 495   OnDraw(dc);
 496 }
 497
 498 void wxView::OnUpdate(wxView *WXUNUSED(sender), wxObject *WXUNUSED(hint))
 499 {
 500 }
 501
 502 void wxView::OnChangeFilename(void)
 503 {
 504   if (GetFrame() && GetDocument())
 505   {
 506     wxString name;
 507     GetDocument()->GetPrintableName(name);
 508
 509     GetFrame()->SetTitle(name);
 510   }
 511 }
 512
 513 void wxView::SetDocument(wxDocument *doc)
 514 {
 515   m_viewDocument = doc;
 516   if (doc)
 517     doc->AddView(this);
 518 }
 519
 520 bool wxView::Close(bool deleteWindow)
 521 {
 522   if (OnClose(deleteWindow))
 523     return TRUE;
 524   else
 525     return FALSE;
 526 }
 527
 528 void wxView::Activate(bool activate)
 529 {
 530   if (GetDocumentManager())
 531   {
 532     OnActivateView(activate, this, GetDocumentManager()->GetCurrentView());
 533     GetDocumentManager()->ActivateView(this, activate);
 534   }
 535 }
 536
 537 bool wxView::OnClose(bool WXUNUSED(deleteWindow))
 538 {
 539   return GetDocument() ? GetDocument()->Close() : TRUE;
 540 }
 541
 542 #if wxUSE_PRINTING_ARCHITECTURE
 543 wxPrintout *wxView::OnCreatePrintout(void)
 544 {
 545   return new wxDocPrintout(this);
 546 }
 547 #endif
 548
 549
 550 /*
 551  * wxDocTemplate
 552  */
 553
 554 wxDocTemplate::wxDocTemplate(wxDocManager *manager, const wxString& descr,
 555   const wxString& filter, const wxString& dir, const wxString& ext,
 556   const wxString& docTypeName, const wxString& viewTypeName,
 557   wxClassInfo *docClassInfo, wxClassInfo *viewClassInfo, long flags)
 558 {
 559   m_documentManager = manager;
 560   m_flags = flags;
 561   m_description = descr;
 562   m_directory = dir;
 563   m_defaultExt = ext;
 564   m_fileFilter = filter;
 565   m_flags = flags;
 566   m_docTypeName = docTypeName;
 567   m_viewTypeName = viewTypeName;
 568   m_documentManager->AssociateTemplate(this);
 569
 570   m_docClassInfo = docClassInfo;
 571   m_viewClassInfo = viewClassInfo;
 572 }
 573
 574 wxDocTemplate::~wxDocTemplate(void)
 575 {
 576   m_documentManager->DisassociateTemplate(this);
 577 }
 578
 579 // Tries to dynamically construct an object of the right
 580 // class.
 581 wxDocument *wxDocTemplate::CreateDocument(const wxString& path, long flags)
 582 {
 583   if (!m_docClassInfo)
 584     return (wxDocument *) NULL;
 585   wxDocument *doc = (wxDocument *)m_docClassInfo->CreateObject();
 586   doc->SetFilename(path);
 587   doc->SetDocumentTemplate(this);
 588   GetDocumentManager()->AddDocument(doc);
 589   doc->SetCommandProcessor(doc->OnCreateCommandProcessor());
 590
 591   if (doc->OnCreate(path, flags))
 592     return doc;
 593   else
 594   {
 595     delete doc;
 596     return (wxDocument *) NULL;
 597   }
 598 }
 599
 600 wxView *wxDocTemplate::CreateView(wxDocument *doc, long flags)
 601 {
 602   if (!m_viewClassInfo)
 603     return (wxView *) NULL;
 604   wxView *view = (wxView *)m_viewClassInfo->CreateObject();
 605   view->SetDocument(doc);
 606   if (view->OnCreate(doc, flags))
 607   {
 608     return view;
 609   }
 610   else
 611   {
 612     delete view;
 613     return (wxView *) NULL;
 614   }
 615 }
 616
 617 BEGIN_EVENT_TABLE(wxDocManager, wxEvtHandler)
 618     EVT_MENU(wxID_OPEN, wxDocManager::OnFileOpen)
 619     EVT_MENU(wxID_CLOSE, wxDocManager::OnFileClose)
 620     EVT_MENU(wxID_REVERT, wxDocManager::OnFileRevert)
 621     EVT_MENU(wxID_NEW, wxDocManager::OnFileNew)
 622     EVT_MENU(wxID_SAVE, wxDocManager::OnFileSave)
 623     EVT_MENU(wxID_SAVEAS, wxDocManager::OnFileSaveAs)
 624     EVT_MENU(wxID_UNDO, wxDocManager::OnUndo)
 625     EVT_MENU(wxID_REDO, wxDocManager::OnRedo)
 626     EVT_MENU(wxID_PRINT, wxDocManager::OnPrint)
 627     EVT_MENU(wxID_PRINT_SETUP, wxDocManager::OnPrintSetup)
 628     EVT_MENU(wxID_PREVIEW, wxDocManager::OnPreview)
 629 END_EVENT_TABLE()
 630
 631 wxDocManager::wxDocManager(long flags, bool initialize)
 632 {
 633   m_defaultDocumentNameCounter = 1;
 634   m_flags = flags;
 635   m_currentView = (wxView *) NULL;
 636   m_maxDocsOpen = 10000;
 637   m_fileHistory = (wxFileHistory *) NULL;
 638   if (initialize)
 639     Initialize();
 640 }
 641
 642 wxDocManager::~wxDocManager(void)
 643 {
 644   Clear();
 645   if (m_fileHistory)
 646     delete m_fileHistory;
 647 }
 648
 649 bool wxDocManager::Clear(bool force)
 650 {
 651   wxNode *node = m_docs.First();
 652   while (node)
 653   {
 654     wxDocument *doc = (wxDocument *)node->Data();
 655     wxNode *next = node->Next();
 656
 657     if (!doc->Close() && !force)
 658       return FALSE;
 659
 660     // Implicitly deletes the document when the last
 661     // view is removed (deleted)
 662     doc->DeleteAllViews();
 663
 664     // Check document is deleted
 665     if (m_docs.Member(doc))
 666       delete doc;
 667
 668     // This assumes that documents are not connected in
 669     // any way, i.e. deleting one document does NOT
 670     // delete another.
 671     node = next;
 672   }
 673   node = m_templates.First();
 674   while (node)
 675   {
 676         wxDocTemplate *templ = (wxDocTemplate*) node->Data();
 677         wxNode* next = node->Next();
 678         delete templ;
 679         node = next;
 680   }
 681   return TRUE;
 682 }
 683
 684 bool wxDocManager::Initialize(void)
 685 {
 686   m_fileHistory = OnCreateFileHistory();
 687   return TRUE;
 688 }
 689
 690 wxFileHistory *wxDocManager::OnCreateFileHistory(void)
 691 {
 692   return new wxFileHistory;
 693 }
 694
 695 void wxDocManager::OnFileClose(wxCommandEvent& WXUNUSED(event))
 696 {
 697   wxDocument *doc = GetCurrentDocument();
 698   if (!doc)
 699     return;
 700   if (doc->Close())
 701   {
 702     doc->DeleteAllViews();
 703     if (m_docs.Member(doc))
 704       delete doc;
 705   }
 706 }
 707
 708 void wxDocManager::OnFileNew(wxCommandEvent& WXUNUSED(event))
 709 {
 710   CreateDocument(wxString(""), wxDOC_NEW);
 711 }
 712
 713 void wxDocManager::OnFileOpen(wxCommandEvent& WXUNUSED(event))
 714 {
 715   CreateDocument(wxString(""), 0);
 716 }
 717
 718 void wxDocManager::OnFileRevert(wxCommandEvent& WXUNUSED(event))
 719 {
 720   wxDocument *doc = GetCurrentDocument();
 721   if (!doc)
 722     return;
 723   doc->Revert();
 724 }
 725
 726 void wxDocManager::OnFileSave(wxCommandEvent& WXUNUSED(event))
 727 {
 728   wxDocument *doc = GetCurrentDocument();
 729   if (!doc)
 730     return;
 731   doc->Save();
 732 }
 733
 734 void wxDocManager::OnFileSaveAs(wxCommandEvent& WXUNUSED(event))
 735 {
 736   wxDocument *doc = GetCurrentDocument();
 737   if (!doc)
 738     return;
 739   doc->SaveAs();
 740 }
 741
 742 void wxDocManager::OnPrint(wxCommandEvent& WXUNUSED(event))
 743 {
 744   wxView *view = GetCurrentView();
 745   if (!view)
 746     return;
 747
 748   wxPrintout *printout = view->OnCreatePrintout();
 749   if (printout)
 750   {
 751     wxPrinter printer;
 752     printer.Print(view->GetFrame(), printout, TRUE);
 753
 754     delete printout;
 755   }
 756 }
 757
 758 void wxDocManager::OnPrintSetup(wxCommandEvent& WXUNUSED(event))
 759 {
 760   wxWindow *parentWin = wxTheApp->GetTopWindow();
 761   wxView *view = GetCurrentView();
 762   if (view)
 763     parentWin = view->GetFrame();
 764
 765   wxPrintDialogData data;
 766
 767   wxPrintDialog printerDialog(parentWin, & data);
 768   printerDialog.GetPrintDialogData().SetSetupDialog(TRUE);
 769   printerDialog.ShowModal();
 770 }
 771
 772 void wxDocManager::OnPreview(wxCommandEvent& WXUNUSED(event))
 773 {
 774   wxView *view = GetCurrentView();
 775   if (!view)
 776     return;
 777
 778   wxPrintout *printout = view->OnCreatePrintout();
 779   if (printout)
 780   {
 781     // Pass two printout objects: for preview, and possible printing.
 782     wxPrintPreviewBase *preview = (wxPrintPreviewBase *) NULL;
 783     preview = new wxPrintPreview(printout, view->OnCreatePrintout());
 784
 785     wxPreviewFrame *frame = new wxPreviewFrame(preview, (wxFrame *)wxTheApp->GetTopWindow(), _("Print Preview"),
 786                 wxPoint(100, 100), wxSize(600, 650));
 787     frame->Centre(wxBOTH);
 788     frame->Initialize();
 789     frame->Show(TRUE);
 790   }
 791 }
 792
 793 void wxDocManager::OnUndo(wxCommandEvent& WXUNUSED(event))
 794 {
 795   wxDocument *doc = GetCurrentDocument();
 796   if (!doc)
 797     return;
 798   if (doc->GetCommandProcessor())
 799     doc->GetCommandProcessor()->Undo();
 800 }
 801
 802 void wxDocManager::OnRedo(wxCommandEvent& WXUNUSED(event))
 803 {
 804   wxDocument *doc = GetCurrentDocument();
 805   if (!doc)
 806     return;
 807   if (doc->GetCommandProcessor())
 808     doc->GetCommandProcessor()->Redo();
 809 }
 810
 811 wxView *wxDocManager::GetCurrentView(void) const
 812 {
 813     if (m_currentView)
 814         return m_currentView;
 815     if (m_docs.Number() == 1)
 816     {
 817         wxDocument* doc = (wxDocument*) m_docs.First()->Data();
 818         return doc->GetFirstView();
 819     }
 820     return (wxView *) NULL;
 821 }
 822
 823 // Extend event processing to search the view's event table
 824 bool wxDocManager::ProcessEvent(wxEvent& event)
 825 {
 826     wxView* view = GetCurrentView();
 827     if (view)
 828     {
 829         if (view->ProcessEvent(event))
 830             return TRUE;
 831     }
 832     return wxEvtHandler::ProcessEvent(event);
 833 }
 834
 835 wxDocument *wxDocManager::CreateDocument(const wxString& path, long flags)
 836 {
 837   wxDocTemplate **templates = new wxDocTemplate *[m_templates.Number()];
 838   int i;
 839   int n = 0;
 840   for (i = 0; i < m_templates.Number(); i++)
 841   {
 842     wxDocTemplate *temp = (wxDocTemplate *)(m_templates.Nth(i)->Data());
 843     if (temp->IsVisible())
 844     {
 845       templates[n] = temp;
 846       n ++;
 847     }
 848   }
 849   if (n == 0)
 850   {
 851     delete[] templates;
 852     return (wxDocument *) NULL;
 853   }
 854
 855   // If we've reached the max number of docs, close the
 856   // first one.
 857   if (GetDocuments().Number() >= m_maxDocsOpen)
 858   {
 859     wxDocument *doc = (wxDocument *)GetDocuments().First()->Data();
 860     if (doc->Close())
 861     {
 862       // Implicitly deletes the document when
 863       // the last view is deleted
 864       doc->DeleteAllViews();
 865
 866       // Check we're really deleted
 867       if (m_docs.Member(doc))
 868         delete doc;
 869     }
 870     else
 871       return (wxDocument *) NULL;
 872   }
 873
 874   // New document: user chooses a template, unless there's only one.
 875   if (flags & wxDOC_NEW)
 876   {
 877     if (n == 1)
 878     {
 879       wxDocTemplate *temp = templates[0];
 880       delete[] templates;
 881       wxDocument *newDoc = temp->CreateDocument(path, flags);
 882       if (newDoc)
 883       {
 884         newDoc->SetDocumentName(temp->GetDocumentName());
 885         newDoc->SetDocumentTemplate(temp);
 886         newDoc->OnNewDocument();
 887       }
 888       return newDoc;
 889     }
 890
 891     wxDocTemplate *temp = SelectDocumentType(templates, n);
 892     delete[] templates;
 893     if (temp)
 894     {
 895       wxDocument *newDoc = temp->CreateDocument(path, flags);
 896       if (newDoc)
 897       {
 898         newDoc->SetDocumentName(temp->GetDocumentName());
 899         newDoc->SetDocumentTemplate(temp);
 900         newDoc->OnNewDocument();
 901       }
 902       return newDoc;
 903     }
 904     else
 905       return (wxDocument *) NULL;
 906   }
 907
 908   // Existing document
 909   wxDocTemplate *temp = (wxDocTemplate *) NULL;
 910
 911   wxString path2("");
 912   if (path != "")
 913     path2 = path;
 914
 915   if (flags & wxDOC_SILENT)
 916     temp = FindTemplateForPath(path2);
 917   else
 918     temp = SelectDocumentPath(templates, n, path2, flags);
 919
 920   delete[] templates;
 921
 922   if (temp)
 923   {
 924     wxDocument *newDoc = temp->CreateDocument(path2, flags);
 925     if (newDoc)
 926     {
 927       newDoc->SetDocumentName(temp->GetDocumentName());
 928       newDoc->SetDocumentTemplate(temp);
 929       if (!newDoc->OnOpenDocument(path2))
 930       {
 931         delete newDoc;
 932         return (wxDocument *) NULL;
 933       }
 934       AddFileToHistory(path2);
 935     }
 936     return newDoc;
 937   }
 938   else
 939     return (wxDocument *) NULL;
 940 }
 941
 942 wxView *wxDocManager::CreateView(wxDocument *doc, long flags)
 943 {
 944   wxDocTemplate **templates = new wxDocTemplate *[m_templates.Number()];
 945   int n =0;
 946   int i;
 947   for (i = 0; i < m_templates.Number(); i++)
 948   {
 949     wxDocTemplate *temp = (wxDocTemplate *)(m_templates.Nth(i)->Data());
 950     if (temp->IsVisible())
 951     {
 952       if (temp->GetDocumentName() == doc->GetDocumentName())
 953       {
 954         templates[n] = temp;
 955         n ++;
 956       }
 957     }
 958   }
 959   if (n == 0)
 960   {
 961     delete[] templates;
 962     return (wxView *) NULL;
 963   }
 964   if (n == 1)
 965   {
 966     wxDocTemplate *temp = templates[0];
 967     delete[] templates;
 968     wxView *view = temp->CreateView(doc, flags);
 969     if (view)
 970       view->SetViewName(temp->GetViewName());
 971     return view;
 972   }
 973
 974   wxDocTemplate *temp = SelectViewType(templates, n);
 975   delete[] templates;
 976   if (temp)
 977   {
 978     wxView *view = temp->CreateView(doc, flags);
 979     if (view)
 980       view->SetViewName(temp->GetViewName());
 981     return view;
 982   }
 983   else
 984     return (wxView *) NULL;
 985 }
 986
 987 // Not yet implemented
 988 void wxDocManager::DeleteTemplate(wxDocTemplate *WXUNUSED(temp), long WXUNUSED(flags))
 989 {
 990 }
 991
 992 // Not yet implemented
 993 bool wxDocManager::FlushDoc(wxDocument *WXUNUSED(doc))
 994 {
 995   return FALSE;
 996 }
 997
 998 wxDocument *wxDocManager::GetCurrentDocument(void) const
 999 {
1000   if (m_currentView)
1001     return m_currentView->GetDocument();
1002   else
1003     return (wxDocument *) NULL;
1004 }
1005
1006 // Make a default document name
1007 bool wxDocManager::MakeDefaultName(wxString& name)
1008 {
1009   name.Printf(_("unnamed%d"), m_defaultDocumentNameCounter);
1010   m_defaultDocumentNameCounter++;
1011
1012   return TRUE;
1013 }
1014
1015 // Not yet implemented
1016 wxDocTemplate *wxDocManager::MatchTemplate(const wxString& WXUNUSED(path))
1017 {
1018   return (wxDocTemplate *) NULL;
1019 }
1020
1021 // File history management
1022 void wxDocManager::AddFileToHistory(const wxString& file)
1023 {
1024   if (m_fileHistory)
1025     m_fileHistory->AddFileToHistory(file);
1026 }
1027
1028 wxString wxDocManager::GetHistoryFile(int i) const
1029 {
1030   if (m_fileHistory)
1031     return wxString(m_fileHistory->GetHistoryFile(i));
1032   else
1033     return wxString("");
1034 }
1035
1036 void wxDocManager::FileHistoryUseMenu(wxMenu *menu)
1037 {
1038   if (m_fileHistory)
1039     m_fileHistory->UseMenu(menu);
1040 }
1041
1042 void wxDocManager::FileHistoryRemoveMenu(wxMenu *menu)
1043 {
1044   if (m_fileHistory)
1045     m_fileHistory->RemoveMenu(menu);
1046 }
1047
1048 #if wxUSE_CONFIG
1049 void wxDocManager::FileHistoryLoad(wxConfigBase& config)
1050 {
1051   if (m_fileHistory)
1052     m_fileHistory->Load(config);
1053 }
1054
1055 void wxDocManager::FileHistorySave(wxConfigBase& config)
1056 {
1057   if (m_fileHistory)
1058     m_fileHistory->Save(config);
1059 }
1060 #endif
1061
1062 void wxDocManager::FileHistoryAddFilesToMenu(wxMenu* menu)
1063 {
1064   if (m_fileHistory)
1065     m_fileHistory->AddFilesToMenu(menu);
1066 }
1067
1068 void wxDocManager::FileHistoryAddFilesToMenu()
1069 {
1070   if (m_fileHistory)
1071     m_fileHistory->AddFilesToMenu();
1072 }
1073
1074 int wxDocManager::GetNoHistoryFiles(void) const
1075 {
1076   if (m_fileHistory)
1077     return m_fileHistory->GetNoHistoryFiles();
1078   else
1079     return 0;
1080 }
1081
1082 static char *FindExtension(char *path)
1083 {
1084   static char ext[10];
1085   int len = strlen(path);
1086   if (path)
1087   {
1088     int i = 0;
1089     for (i = (len-1); i > 0; i --)
1090       if (path[i] == '.')
1091         break;
1092     if (path[i] == '.')
1093     {
1094       int j;
1095       for (j = i+1; j < len; j++)
1096         ext[(int)(j-(i+1))] = (char)wxToLower(path[j]); // NOTE Should not use tolower under UNIX
1097       ext[j-(i+1)] = 0;
1098       return ext;
1099     }
1100     else
1101       return (char *) NULL;
1102   }
1103   else return (char *) NULL;
1104 }
1105
1106
1107 // Given a path, try to find a matching template. Won't
1108 // always work, of course.
1109 wxDocTemplate *wxDocManager::FindTemplateForPath(const wxString& path)
1110 {
1111   char *theExt = FindExtension((char *)(const char *)path);
1112   if (!theExt)
1113     return (wxDocTemplate *) NULL;
1114   wxDocTemplate *theTemplate = (wxDocTemplate *) NULL;
1115
1116   if (m_templates.Number() == 1)
1117     return (wxDocTemplate *)m_templates.First()->Data();
1118
1119   // Find the template which this extension corresponds to
1120   int i;
1121   for (i = 0; i < m_templates.Number(); i++)
1122   {
1123     wxDocTemplate *temp = (wxDocTemplate *)m_templates.Nth(i)->Data();
1124     if (strcmp(temp->GetDefaultExtension(), theExt) == 0)
1125     {
1126       theTemplate = temp;
1127       break;
1128     }
1129   }
1130   return theTemplate;
1131 }
1132
1133 // Prompts user to open a file, using file specs in templates.
1134 // How to implement in wxWindows? Must extend the file selector
1135 // dialog or implement own; OR match the extension to the
1136 // template extension.
1137
1138 #ifdef __WXMSW__
1139 wxDocTemplate *wxDocManager::SelectDocumentPath(wxDocTemplate **templates,
1140     int noTemplates, wxString& path, long WXUNUSED(flags), bool WXUNUSED(save))
1141 #else
1142 wxDocTemplate *wxDocManager::SelectDocumentPath(wxDocTemplate **WXUNUSED(templates),
1143     int WXUNUSED(noTemplates), wxString& path, long WXUNUSED(flags), bool WXUNUSED(save))
1144 #endif
1145 {
1146   // We can only have multiple filters in Windows
1147 #ifdef __WXMSW__
1148     wxString descrBuf;
1149
1150     int i;
1151     for (i = 0; i < noTemplates; i++)
1152     {
1153         if (templates[i]->IsVisible())
1154         {
1155             // add a '|' to separate this filter from the previous one
1156             if ( !descrBuf.IsEmpty() )
1157                 descrBuf << '|';
1158
1159             descrBuf << templates[i]->GetDescription()
1160                      << " (" << templates[i]->GetFileFilter() << ") |"
1161                      << templates[i]->GetFileFilter();
1162         }
1163     }
1164 #else
1165   wxString descrBuf = "*.*";
1166 #endif
1167
1168   wxString pathTmp = wxFileSelector(_("Select a file"), "", "", "",
1169                                     descrBuf, 0, wxTheApp->GetTopWindow());
1170
1171   if (!pathTmp.IsEmpty())
1172   {
1173     path = pathTmp;
1174     char *theExt = FindExtension((char *)(const char *)path);
1175     if (!theExt)
1176       return (wxDocTemplate *) NULL;
1177
1178     // This is dodgy in that we're selecting the template on the
1179     // basis of the file extension, which may not be a standard
1180     // one. We really want to know exactly which template was
1181     // chosen by using a more advanced file selector.
1182     wxDocTemplate *theTemplate = FindTemplateForPath(path);
1183     return theTemplate;
1184   }
1185   else
1186   {
1187     path = "";
1188     return (wxDocTemplate *) NULL;
1189   }
1190 #if 0
1191   // In all other windowing systems, until we have more advanced
1192   // file selectors, we must select the document type (template) first, and
1193   // _then_ pop up the file selector.
1194   wxDocTemplate *temp = SelectDocumentType(templates, noTemplates);
1195   if (!temp)
1196     return (wxDocTemplate *) NULL;
1197
1198   char *pathTmp = wxFileSelector(_("Select a file"), "", "",
1199      temp->GetDefaultExtension(),
1200      temp->GetFileFilter(),
1201      0, wxTheApp->GetTopWindow());
1202
1203   if (pathTmp)
1204   {
1205     path = pathTmp;
1206     return temp;
1207   }
1208   else
1209     return (wxDocTemplate *) NULL;
1210 #endif
1211 }
1212
1213 wxDocTemplate *wxDocManager::SelectDocumentType(wxDocTemplate **templates,
1214     int noTemplates)
1215 {
1216   char **strings = new char *[noTemplates];
1217   char **data = new char *[noTemplates];
1218   int i;
1219   int n = 0;
1220   for (i = 0; i < noTemplates; i++)
1221   {
1222     if (templates[i]->IsVisible())
1223     {
1224       strings[n] = WXSTRINGCAST templates[i]->m_description;
1225       data[n] = (char *)templates[i];
1226       n ++;
1227     }
1228   }
1229   if (n == 0)
1230   {
1231     delete[] strings;
1232     delete[] data;
1233     return (wxDocTemplate *) NULL;
1234   }
1235   else if (n == 1)
1236   {
1237     wxDocTemplate *temp = (wxDocTemplate *)data[0];
1238     delete[] strings;
1239     delete[] data;
1240     return temp;
1241   }
1242
1243   wxDocTemplate *theTemplate = (wxDocTemplate *)wxGetSingleChoiceData(_("Select a document template"), _("Templates"), n,
1244     strings, data);
1245   delete[] strings;
1246   delete[] data;
1247   return theTemplate;
1248 }
1249
1250 wxDocTemplate *wxDocManager::SelectViewType(wxDocTemplate **templates,
1251     int noTemplates)
1252 {
1253   char **strings = new char *[noTemplates];
1254   char **data = new char *[noTemplates];
1255   int i;
1256   int n = 0;
1257   for (i = 0; i < noTemplates; i++)
1258   {
1259     if (templates[i]->IsVisible() && (templates[i]->GetViewName() != ""))
1260     {
1261       strings[n] = WXSTRINGCAST templates[i]->m_viewTypeName;
1262       data[n] = (char *)templates[i];
1263       n ++;
1264     }
1265   }
1266   wxDocTemplate *theTemplate = (wxDocTemplate *)wxGetSingleChoiceData(_("Select a document view"), _("Views"), n,
1267     strings, data);
1268   delete[] strings;
1269   delete[] data;
1270   return theTemplate;
1271 }
1272
1273 void wxDocManager::AssociateTemplate(wxDocTemplate *temp)
1274 {
1275   if (!m_templates.Member(temp))
1276     m_templates.Append(temp);
1277 }
1278
1279 void wxDocManager::DisassociateTemplate(wxDocTemplate *temp)
1280 {
1281   m_templates.DeleteObject(temp);
1282 }
1283
1284 // Add and remove a document from the manager's list
1285 void wxDocManager::AddDocument(wxDocument *doc)
1286 {
1287   if (!m_docs.Member(doc))
1288     m_docs.Append(doc);
1289 }
1290
1291 void wxDocManager::RemoveDocument(wxDocument *doc)
1292 {
1293   m_docs.DeleteObject(doc);
1294 }
1295
1296 // Views or windows should inform the document manager
1297 // when a view is going in or out of focus
1298 void wxDocManager::ActivateView(wxView *view, bool activate, bool WXUNUSED(deleting))
1299 {
1300   // If we're deactiving, and if we're not actually deleting the view, then
1301   // don't reset the current view because we may be going to
1302   // a window without a view.
1303   // WHAT DID I MEAN BY THAT EXACTLY?
1304 /*
1305   if (deleting)
1306   {
1307     if (m_currentView == view)
1308       m_currentView = NULL;
1309   }
1310   else
1311 */
1312   {
1313     if (activate)
1314       m_currentView = view;
1315     else
1316       m_currentView = (wxView *) NULL;
1317   }
1318 }
1319
1320 /*
1321  * Default document child frame
1322  */
1323
1324 BEGIN_EVENT_TABLE(wxDocChildFrame, wxFrame)
1325     EVT_ACTIVATE(wxDocChildFrame::OnActivate)
1326     EVT_CLOSE(wxDocChildFrame::OnCloseWindow)
1327 END_EVENT_TABLE()
1328
1329 wxDocChildFrame::wxDocChildFrame(wxDocument *doc, wxView *view, wxFrame *frame, wxWindowID id, const wxString& title,
1330   const wxPoint& pos, const wxSize& size, long style, const wxString& name):
1331     wxFrame(frame, id, title, pos, size, style, name)
1332 {
1333   m_childDocument = doc;
1334   m_childView = view;
1335   if (view)
1336     view->SetFrame(this);
1337 }
1338
1339 wxDocChildFrame::~wxDocChildFrame(void)
1340 {
1341 }
1342
1343 // Extend event processing to search the view's event table
1344 bool wxDocChildFrame::ProcessEvent(wxEvent& event)
1345 {
1346     if (m_childView)
1347         m_childView->Activate(TRUE);
1348
1349         if ( !m_childView || ! m_childView->ProcessEvent(event) )
1350     {
1351         // Only hand up to the parent if it's a menu command
1352         if (!event.IsKindOf(CLASSINFO(wxCommandEvent)) || !GetParent() || !GetParent()->ProcessEvent(event))
1353                     return wxEvtHandler::ProcessEvent(event);
1354         else
1355             return TRUE;
1356     }
1357         else
1358                 return TRUE;
1359 }
1360
1361 void wxDocChildFrame::OnActivate(wxActivateEvent& event)
1362 {
1363   wxFrame::OnActivate(event);
1364
1365   if (m_childView)
1366     m_childView->Activate(event.GetActive());
1367 }
1368
1369 void wxDocChildFrame::OnCloseWindow(wxCloseEvent& event)
1370 {
1371   if (m_childView)
1372   {
1373     bool ans = FALSE;
1374     if (!event.CanVeto())
1375       ans = TRUE; // Must delete.
1376     else
1377       ans = m_childView->Close(FALSE); // FALSE means don't delete associated window
1378
1379     if (ans)
1380     {
1381       m_childView->Activate(FALSE);
1382       delete m_childView;
1383       m_childView = (wxView *) NULL;
1384       m_childDocument = (wxDocument *) NULL;
1385
1386       this->Destroy();
1387     }
1388     else
1389       event.Veto();
1390   }
1391   else
1392     event.Veto();
1393 }
1394
1395 /*
1396  * Default parent frame
1397  */
1398
1399 BEGIN_EVENT_TABLE(wxDocParentFrame, wxFrame)
1400     EVT_MENU(wxID_EXIT, wxDocParentFrame::OnExit)
1401     EVT_MENU_RANGE(wxID_FILE1, wxID_FILE9, wxDocParentFrame::OnMRUFile)
1402     EVT_CLOSE(wxDocParentFrame::OnCloseWindow)
1403 END_EVENT_TABLE()
1404
1405 wxDocParentFrame::wxDocParentFrame(wxDocManager *manager, wxFrame *frame, wxWindowID id, const wxString& title,
1406   const wxPoint& pos, const wxSize& size, long style, const wxString& name):
1407   wxFrame(frame, id, title, pos, size, style, name)
1408 {
1409   m_docManager = manager;
1410 }
1411
1412 void wxDocParentFrame::OnExit(wxCommandEvent& WXUNUSED(event))
1413 {
1414     Close();
1415 }
1416
1417 void wxDocParentFrame::OnMRUFile(wxCommandEvent& event)
1418 {
1419       wxString f(m_docManager->GetHistoryFile(event.GetSelection() - wxID_FILE1));
1420       if (f != "")
1421         (void)m_docManager->CreateDocument(f, wxDOC_SILENT);
1422 }
1423
1424 // Extend event processing to search the view's event table
1425 bool wxDocParentFrame::ProcessEvent(wxEvent& event)
1426 {
1427     // Try the document manager, then do default processing
1428     if (!m_docManager || !m_docManager->ProcessEvent(event))
1429         return wxEvtHandler::ProcessEvent(event);
1430     else
1431         return TRUE;
1432 }
1433
1434 // Define the behaviour for the frame closing
1435 // - must delete all frames except for the main one.
1436 void wxDocParentFrame::OnCloseWindow(wxCloseEvent& event)
1437 {
1438   if (m_docManager->Clear(!event.CanVeto()))
1439   {
1440     this->Destroy();
1441   }
1442   else
1443     event.Veto();
1444 }
1445
1446 #if wxUSE_PRINTING_ARCHITECTURE
1447
1448 wxDocPrintout::wxDocPrintout(wxView *view, const wxString& title):
1449   wxPrintout(WXSTRINGCAST title)
1450 {
1451   m_printoutView = view;
1452 }
1453
1454 bool wxDocPrintout::OnPrintPage(int WXUNUSED(page))
1455 {
1456   wxDC *dc = GetDC();
1457
1458   // Get the logical pixels per inch of screen and printer
1459   int ppiScreenX, ppiScreenY;
1460   GetPPIScreen(&ppiScreenX, &ppiScreenY);
1461   int ppiPrinterX, ppiPrinterY;
1462   GetPPIPrinter(&ppiPrinterX, &ppiPrinterY);
1463
1464   // This scales the DC so that the printout roughly represents the
1465   // the screen scaling. The text point size _should_ be the right size
1466   // but in fact is too small for some reason. This is a detail that will
1467   // need to be addressed at some point but can be fudged for the
1468   // moment.
1469   float scale = (float)((float)ppiPrinterX/(float)ppiScreenX);
1470
1471   // Now we have to check in case our real page size is reduced
1472   // (e.g. because we're drawing to a print preview memory DC)
1473   int pageWidth, pageHeight;
1474   int w, h;
1475   dc->GetSize(&w, &h);
1476   GetPageSizePixels(&pageWidth, &pageHeight);
1477
1478   // If printer pageWidth == current DC width, then this doesn't
1479   // change. But w might be the preview bitmap width, so scale down.
1480   float overallScale = scale * (float)(w/(float)pageWidth);
1481   dc->SetUserScale(overallScale, overallScale);
1482
1483   if (m_printoutView)
1484   {
1485     m_printoutView->OnDraw(dc);
1486   }
1487   return TRUE;
1488 }
1489
1490 bool wxDocPrintout::HasPage(int pageNum)
1491 {
1492   return (pageNum == 1);
1493 }
1494
1495 bool wxDocPrintout::OnBeginDocument(int startPage, int endPage)
1496 {
1497   if (!wxPrintout::OnBeginDocument(startPage, endPage))
1498     return FALSE;
1499
1500   return TRUE;
1501 }
1502
1503 void wxDocPrintout::GetPageInfo(int *minPage, int *maxPage, int *selPageFrom, int *selPageTo)
1504 {
1505   *minPage = 1;
1506   *maxPage = 1;
1507   *selPageFrom = 1;
1508   *selPageTo = 1;
1509 }
1510
1511 #endif
1512
1513 /*
1514  * Command processing framework
1515  */
1516
1517 wxCommand::wxCommand(bool canUndoIt, const wxString& name)
1518 {
1519   m_canUndo = canUndoIt;
1520   m_commandName = name;
1521 }
1522
1523 wxCommand::~wxCommand(void)
1524 {
1525 }
1526
1527 // Command processor
1528 wxCommandProcessor::wxCommandProcessor(int maxCommands)
1529 {
1530   m_maxNoCommands = maxCommands;
1531   m_currentCommand = (wxNode *) NULL;
1532   m_commandEditMenu = (wxMenu *) NULL;
1533 }
1534
1535 wxCommandProcessor::~wxCommandProcessor(void)
1536 {
1537   ClearCommands();
1538 }
1539
1540 // Pass a command to the processor. The processor calls Do();
1541 // if successful, is appended to the command history unless
1542 // storeIt is FALSE.
1543 bool wxCommandProcessor::Submit(wxCommand *command, bool storeIt)
1544 {
1545   bool success = command->Do();
1546   if (success && storeIt)
1547   {
1548     if (m_commands.Number() == m_maxNoCommands)
1549     {
1550       wxNode *firstNode = m_commands.First();
1551       wxCommand *firstCommand = (wxCommand *)firstNode->Data();
1552       delete firstCommand;
1553       delete firstNode;
1554     }
1555
1556     // Correct a bug: we must chop off the current 'branch'
1557     // so that we're at the end of the command list.
1558     if (!m_currentCommand)
1559       ClearCommands();
1560     else
1561     {
1562       wxNode *node = m_currentCommand->Next();
1563       while (node)
1564       {
1565         wxNode *next = node->Next();
1566         delete (wxCommand *)node->Data();
1567         delete node;
1568         node = next;
1569       }
1570     }
1571
1572     m_commands.Append(command);
1573     m_currentCommand = m_commands.Last();
1574     SetMenuStrings();
1575   }
1576   return success;
1577 }
1578
1579 bool wxCommandProcessor::Undo(void)
1580 {
1581   if (m_currentCommand)
1582   {
1583     wxCommand *command = (wxCommand *)m_currentCommand->Data();
1584     if (command->CanUndo())
1585     {
1586       bool success = command->Undo();
1587       if (success)
1588       {
1589         m_currentCommand = m_currentCommand->Previous();
1590         SetMenuStrings();
1591         return TRUE;
1592       }
1593     }
1594   }
1595   return FALSE;
1596 }
1597
1598 bool wxCommandProcessor::Redo(void)
1599 {
1600   wxCommand *redoCommand = (wxCommand *) NULL;
1601   wxNode *redoNode = (wxNode *) NULL;
1602   if (m_currentCommand && m_currentCommand->Next())
1603   {
1604     redoCommand = (wxCommand *)m_currentCommand->Next()->Data();
1605     redoNode = m_currentCommand->Next();
1606   }
1607   else
1608   {
1609     if (m_commands.Number() > 0)
1610     {
1611       redoCommand = (wxCommand *)m_commands.First()->Data();
1612       redoNode = m_commands.First();
1613     }
1614   }
1615
1616   if (redoCommand)
1617   {
1618     bool success = redoCommand->Do();
1619     if (success)
1620     {
1621       m_currentCommand = redoNode;
1622       SetMenuStrings();
1623       return TRUE;
1624     }
1625   }
1626   return FALSE;
1627 }
1628
1629 bool wxCommandProcessor::CanUndo(void) const
1630 {
1631   if (m_currentCommand)
1632     return ((wxCommand *)m_currentCommand->Data())->CanUndo();
1633   return FALSE;
1634 }
1635
1636 bool wxCommandProcessor::CanRedo(void) const
1637 {
1638     if ((m_currentCommand != (wxNode*) NULL) && (m_currentCommand->Next() == (wxNode*) NULL))
1639         return FALSE;
1640
1641     if ((m_currentCommand != (wxNode*) NULL) && (m_currentCommand->Next() != (wxNode*) NULL))
1642         return TRUE;
1643
1644     if ((m_currentCommand == (wxNode*) NULL) && (m_commands.Number() > 0))
1645         return TRUE;
1646
1647     return FALSE;
1648 }
1649
1650 void wxCommandProcessor::Initialize(void)
1651 {
1652   m_currentCommand = m_commands.Last();
1653   SetMenuStrings();
1654 }
1655
1656 void wxCommandProcessor::SetMenuStrings(void)
1657 {
1658   if (m_commandEditMenu)
1659   {
1660     wxString buf;
1661     if (m_currentCommand)
1662     {
1663       wxCommand *command = (wxCommand *)m_currentCommand->Data();
1664       wxString commandName(command->GetName());
1665       if (commandName == "") commandName = _("Unnamed command");
1666       bool canUndo = command->CanUndo();
1667       if (canUndo)
1668         buf = wxString(_("&Undo ")) + commandName;
1669       else
1670         buf = wxString(_("Can't &Undo ")) + commandName;
1671
1672       m_commandEditMenu->SetLabel(wxID_UNDO, buf);
1673       m_commandEditMenu->Enable(wxID_UNDO, canUndo);
1674
1675       // We can redo, if we're not at the end of the history.
1676       if (m_currentCommand->Next())
1677       {
1678         wxCommand *redoCommand = (wxCommand *)m_currentCommand->Next()->Data();
1679         wxString redoCommandName(redoCommand->GetName());
1680         if (redoCommandName == "") redoCommandName = _("Unnamed command");
1681         buf = wxString(_("&Redo ")) + redoCommandName;
1682         m_commandEditMenu->SetLabel(wxID_REDO, buf);
1683         m_commandEditMenu->Enable(wxID_REDO, TRUE);
1684       }
1685       else
1686       {
1687         m_commandEditMenu->SetLabel(wxID_REDO, _("&Redo"));
1688         m_commandEditMenu->Enable(wxID_REDO, FALSE);
1689       }
1690     }
1691     else
1692     {
1693       m_commandEditMenu->SetLabel(wxID_UNDO, _("&Undo"));
1694       m_commandEditMenu->Enable(wxID_UNDO, FALSE);
1695
1696       if (m_commands.Number() == 0)
1697       {
1698         m_commandEditMenu->SetLabel(wxID_REDO, _("&Redo"));
1699         m_commandEditMenu->Enable(wxID_REDO, FALSE);
1700       }
1701       else
1702       {
1703         // currentCommand is NULL but there are commands: this means that
1704         // we've undone to the start of the list, but can redo the first.
1705         wxCommand *redoCommand = (wxCommand *)m_commands.First()->Data();
1706         wxString redoCommandName(redoCommand->GetName());
1707         if (redoCommandName == "") redoCommandName = _("Unnamed command");
1708         buf = wxString(_("&Redo ")) + redoCommandName;
1709         m_commandEditMenu->SetLabel(wxID_REDO, buf);
1710         m_commandEditMenu->Enable(wxID_REDO, TRUE);
1711       }
1712     }
1713   }
1714 }
1715
1716 void wxCommandProcessor::ClearCommands(void)
1717 {
1718   wxNode *node = m_commands.First();
1719   while (node)
1720   {
1721     wxCommand *command = (wxCommand *)node->Data();
1722     delete command;
1723     delete node;
1724     node = m_commands.First();
1725   }
1726   m_currentCommand = (wxNode *) NULL;
1727 }
1728
1729
1730 /*
1731  * File history processor
1732  */
1733
1734 wxFileHistory::wxFileHistory(int maxFiles)
1735 {
1736   m_fileMaxFiles = maxFiles;
1737   m_fileHistoryN = 0;
1738   m_fileHistory = new char *[m_fileMaxFiles];
1739 }
1740
1741 wxFileHistory::~wxFileHistory(void)
1742 {
1743   int i;
1744   for (i = 0; i < m_fileHistoryN; i++)
1745     delete[] m_fileHistory[i];
1746   delete[] m_fileHistory;
1747 }
1748
1749 // File history management
1750 void wxFileHistory::AddFileToHistory(const wxString& file)
1751 {
1752   int i;
1753   // Check we don't already have this file
1754   for (i = 0; i < m_fileHistoryN; i++)
1755   {
1756       if (m_fileHistory[i] && wxString(m_fileHistory[i]) == file)
1757           return;
1758   }
1759
1760   // Add to the project file history:
1761   // Move existing files (if any) down so we can insert file at beginning.
1762
1763   // First delete filename that has popped off the end of the array (if any)
1764   if (m_fileHistoryN == m_fileMaxFiles)
1765   {
1766     delete[] m_fileHistory[m_fileMaxFiles-1];
1767     m_fileHistory[m_fileMaxFiles-1] = (char *) NULL;
1768   }
1769   if (m_fileHistoryN < m_fileMaxFiles)
1770   {
1771     wxNode* node = m_fileMenus.First();
1772     while (node)
1773     {
1774         wxMenu* menu = (wxMenu*) node->Data();
1775         if (m_fileHistoryN == 0)
1776             menu->AppendSeparator();
1777         menu->Append(wxID_FILE1+m_fileHistoryN, _("[EMPTY]"));
1778         node = node->Next();
1779     }
1780     m_fileHistoryN ++;
1781   }
1782   // Shuffle filenames down
1783   for (i = (m_fileHistoryN-1); i > 0; i--)
1784   {
1785     m_fileHistory[i] = m_fileHistory[i-1];
1786   }
1787   m_fileHistory[0] = copystring(file);
1788
1789   for (i = 0; i < m_fileHistoryN; i++)
1790     if (m_fileHistory[i])
1791     {
1792       wxString buf;
1793       buf.Printf("&%d %s", i+1, m_fileHistory[i]);
1794       wxNode* node = m_fileMenus.First();
1795       while (node)
1796       {
1797         wxMenu* menu = (wxMenu*) node->Data();
1798         menu->SetLabel(wxID_FILE1+i, buf);
1799         node = node->Next();
1800       }
1801     }
1802 }
1803
1804 wxString wxFileHistory::GetHistoryFile(int i) const
1805 {
1806   if (i < m_fileHistoryN)
1807     return wxString(m_fileHistory[i]);
1808   else
1809     return wxString("");
1810 }
1811
1812 void wxFileHistory::UseMenu(wxMenu *menu)
1813 {
1814   if (!m_fileMenus.Member(menu))
1815     m_fileMenus.Append(menu);
1816 }
1817
1818 void wxFileHistory::RemoveMenu(wxMenu *menu)
1819 {
1820   m_fileMenus.DeleteObject(menu);
1821 }
1822
1823 #if wxUSE_CONFIG
1824 void wxFileHistory::Load(wxConfigBase& config)
1825 {
1826   m_fileHistoryN = 0;
1827   wxString buf;
1828   buf.Printf("file%d", m_fileHistoryN+1);
1829   wxString historyFile;
1830   while ((m_fileHistoryN <= m_fileMaxFiles) && config.Read(buf, &historyFile) && (historyFile != ""))
1831   {
1832     m_fileHistory[m_fileHistoryN] = copystring((const char*) historyFile);
1833     m_fileHistoryN ++;
1834     buf.Printf("file%d", m_fileHistoryN+1);
1835     historyFile = "";
1836   }
1837   AddFilesToMenu();
1838 }
1839
1840 void wxFileHistory::Save(wxConfigBase& config)
1841 {
1842   int i;
1843   for (i = 0; i < m_fileHistoryN; i++)
1844   {
1845     wxString buf;
1846     buf.Printf("file%d", i+1);
1847     config.Write(buf, wxString(m_fileHistory[i]));
1848   }
1849 }
1850 #endif
1851
1852 void wxFileHistory::AddFilesToMenu()
1853 {
1854     if (m_fileHistoryN > 0)
1855     {
1856         wxNode* node = m_fileMenus.First();
1857         while (node)
1858         {
1859             wxMenu* menu = (wxMenu*) node->Data();
1860             menu->AppendSeparator();
1861             int i;
1862             for (i = 0; i < m_fileHistoryN; i++)
1863             {
1864                 if (m_fileHistory[i])
1865                 {
1866                     wxString buf;
1867                     buf.Printf("&%d %s", i+1, m_fileHistory[i]);
1868                     menu->Append(wxID_FILE1+i, buf);
1869                 }
1870             }
1871             node = node->Next();
1872         }
1873     }
1874 }
1875
1876 void wxFileHistory::AddFilesToMenu(wxMenu* menu)
1877 {
1878     if (m_fileHistoryN > 0)
1879     {
1880         menu->AppendSeparator();
1881         int i;
1882         for (i = 0; i < m_fileHistoryN; i++)
1883         {
1884             if (m_fileHistory[i])
1885             {
1886                 wxString buf;
1887                 buf.Printf("&%d %s", i+1, m_fileHistory[i]);
1888                 menu->Append(wxID_FILE1+i, buf);
1889             }
1890         }
1891     }
1892 }
1893
1894 #if 0
1895 /*
1896  * wxPrintInfo
1897  */
1898
1899 wxPrintInfo::wxPrintInfo(void)
1900 {
1901   pageNumber = 1;
1902 }
1903
1904 wxPrintInfo::~wxPrintInfo(void)
1905 {
1906 }
1907 #endif
1908
1909 /*
1910  * Permits compatibility with existing file formats and functions
1911  * that manipulate files directly
1912  */
1913
1914 bool wxTransferFileToStream(const wxString& filename, ostream& stream)
1915 {
1916   FILE *fd1;
1917   int ch;
1918
1919   if ((fd1 = fopen (WXSTRINGCAST filename, "rb")) == NULL)
1920     return FALSE;
1921
1922   while ((ch = getc (fd1)) != EOF)
1923     stream << (unsigned char)ch;
1924
1925   fclose (fd1);
1926   return TRUE;
1927 }
1928
1929 bool wxTransferStreamToFile(istream& stream, const wxString& filename)
1930 {
1931   FILE *fd1;
1932   int ch;
1933
1934   if ((fd1 = fopen (WXSTRINGCAST filename, "wb")) == NULL)
1935     {
1936       return FALSE;
1937     }
1938
1939   while (!stream.eof())
1940   {
1941     ch = stream.get();
1942     if (!stream.eof())
1943       putc (ch, fd1);
1944   }
1945   fclose (fd1);
1946   return TRUE;
1947 }
1948
1949 #endif
1950   // End wxUSE_DOC_VIEW_ARCHITECTURE