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