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     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(wxDocument *doc)
 466 {
 467   SetDocument(doc);
 468
 469   m_viewTypeName = "";
 470   m_viewFrame = (wxFrame *) NULL;
 471 }
 472
 473 wxView::~wxView(void)
 474 {
 475   GetDocumentManager()->ActivateView(this, FALSE, TRUE);
 476   m_viewDocument->RemoveView(this);
 477 }
 478
 479 // Extend event processing to search the document's event table
 480 bool wxView::ProcessEvent(wxEvent& event)
 481 {
 482         if ( !GetDocument() || !GetDocument()->ProcessEvent(event) )
 483                 return wxEvtHandler::ProcessEvent(event);
 484         else
 485                 return TRUE;
 486 }
 487
 488 void wxView::OnActivateView(bool WXUNUSED(activate), wxView *WXUNUSED(activeView), wxView *WXUNUSED(deactiveView))
 489 {
 490 }
 491
 492 void wxView::OnPrint(wxDC *dc, wxObject *WXUNUSED(info))
 493 {
 494   OnDraw(dc);
 495 }
 496
 497 void wxView::OnUpdate(wxView *WXUNUSED(sender), wxObject *WXUNUSED(hint))
 498 {
 499 }
 500
 501 void wxView::OnChangeFilename(void)
 502 {
 503   if (GetFrame() && GetDocument())
 504   {
 505     wxString name;
 506     GetDocument()->GetPrintableName(name);
 507
 508     GetFrame()->SetTitle(name);
 509   }
 510 }
 511
 512 void wxView::SetDocument(wxDocument *doc)
 513 {
 514   m_viewDocument = doc;
 515   if (doc)
 516     doc->AddView(this);
 517 }
 518
 519 bool wxView::Close(bool deleteWindow)
 520 {
 521   if (OnClose(deleteWindow))
 522     return TRUE;
 523   else
 524     return FALSE;
 525 }
 526
 527 void wxView::Activate(bool activate)
 528 {
 529   if (GetDocumentManager())
 530   {
 531     OnActivateView(activate, this, GetDocumentManager()->GetCurrentView());
 532     GetDocumentManager()->ActivateView(this, activate);
 533   }
 534 }
 535
 536 bool wxView::OnClose(bool WXUNUSED(deleteWindow))
 537 {
 538   return GetDocument() ? GetDocument()->Close() : TRUE;
 539 }
 540
 541 #if wxUSE_PRINTING_ARCHITECTURE
 542 wxPrintout *wxView::OnCreatePrintout(void)
 543 {
 544   return new wxDocPrintout(this);
 545 }
 546 #endif
 547
 548
 549 /*
 550  * wxDocTemplate
 551  */
 552
 553 wxDocTemplate::wxDocTemplate(wxDocManager *manager, const wxString& descr,
 554   const wxString& filter, const wxString& dir, const wxString& ext,
 555   const wxString& docTypeName, const wxString& viewTypeName,
 556   wxClassInfo *docClassInfo, wxClassInfo *viewClassInfo, long flags)
 557 {
 558   m_documentManager = manager;
 559   m_flags = flags;
 560   m_description = descr;
 561   m_directory = dir;
 562   m_defaultExt = ext;
 563   m_fileFilter = filter;
 564   m_flags = flags;
 565   m_docTypeName = docTypeName;
 566   m_viewTypeName = viewTypeName;
 567   m_documentManager->AssociateTemplate(this);
 568
 569   m_docClassInfo = docClassInfo;
 570   m_viewClassInfo = viewClassInfo;
 571 }
 572
 573 wxDocTemplate::~wxDocTemplate(void)
 574 {
 575   m_documentManager->DisassociateTemplate(this);
 576 }
 577
 578 // Tries to dynamically construct an object of the right
 579 // class.
 580 wxDocument *wxDocTemplate::CreateDocument(const wxString& path, long flags)
 581 {
 582   if (!m_docClassInfo)
 583     return (wxDocument *) NULL;
 584   wxDocument *doc = (wxDocument *)m_docClassInfo->CreateObject();
 585   doc->SetFilename(path);
 586   doc->SetDocumentTemplate(this);
 587   GetDocumentManager()->AddDocument(doc);
 588   doc->SetCommandProcessor(doc->OnCreateCommandProcessor());
 589
 590   if (doc->OnCreate(path, flags))
 591     return doc;
 592   else
 593   {
 594     delete doc;
 595     return (wxDocument *) NULL;
 596   }
 597 }
 598
 599 wxView *wxDocTemplate::CreateView(wxDocument *doc, long flags)
 600 {
 601   if (!m_viewClassInfo)
 602     return (wxView *) NULL;
 603   wxView *view = (wxView *)m_viewClassInfo->CreateObject();
 604   view->SetDocument(doc);
 605   if (view->OnCreate(doc, flags))
 606   {
 607     return view;
 608   }
 609   else
 610   {
 611     delete view;
 612     return (wxView *) NULL;
 613   }
 614 }
 615
 616 BEGIN_EVENT_TABLE(wxDocManager, wxEvtHandler)
 617     EVT_MENU(wxID_OPEN, wxDocManager::OnFileOpen)
 618     EVT_MENU(wxID_CLOSE, wxDocManager::OnFileClose)
 619     EVT_MENU(wxID_REVERT, wxDocManager::OnFileRevert)
 620     EVT_MENU(wxID_NEW, wxDocManager::OnFileNew)
 621     EVT_MENU(wxID_SAVE, wxDocManager::OnFileSave)
 622     EVT_MENU(wxID_SAVEAS, wxDocManager::OnFileSaveAs)
 623     EVT_MENU(wxID_UNDO, wxDocManager::OnUndo)
 624     EVT_MENU(wxID_REDO, wxDocManager::OnRedo)
 625     EVT_MENU(wxID_PRINT, wxDocManager::OnPrint)
 626     EVT_MENU(wxID_PRINT_SETUP, wxDocManager::OnPrintSetup)
 627     EVT_MENU(wxID_PREVIEW, wxDocManager::OnPreview)
 628 END_EVENT_TABLE()
 629
 630 wxDocManager::wxDocManager(long flags, bool initialize)
 631 {
 632   m_defaultDocumentNameCounter = 1;
 633   m_flags = flags;
 634   m_currentView = (wxView *) NULL;
 635   m_maxDocsOpen = 10000;
 636   m_fileHistory = (wxFileHistory *) NULL;
 637   if (initialize)
 638     Initialize();
 639 }
 640
 641 wxDocManager::~wxDocManager(void)
 642 {
 643   Clear();
 644   if (m_fileHistory)
 645     delete m_fileHistory;
 646 }
 647
 648 bool wxDocManager::Clear(bool force)
 649 {
 650   wxNode *node = m_docs.First();
 651   while (node)
 652   {
 653     wxDocument *doc = (wxDocument *)node->Data();
 654     wxNode *next = node->Next();
 655
 656     if (!doc->Close() && !force)
 657       return FALSE;
 658
 659     // Implicitly deletes the document when the last
 660     // view is removed (deleted)
 661     doc->DeleteAllViews();
 662
 663     // Check document is deleted
 664     if (m_docs.Member(doc))
 665       delete doc;
 666
 667     // This assumes that documents are not connected in
 668     // any way, i.e. deleting one document does NOT
 669     // delete another.
 670     node = next;
 671   }
 672   node = m_templates.First();
 673   while (node)
 674   {
 675         wxDocTemplate *templ = (wxDocTemplate*) node->Data();
 676         wxNode* next = node->Next();
 677         delete templ;
 678         node = next;
 679   }
 680   return TRUE;
 681 }
 682
 683 bool wxDocManager::Initialize(void)
 684 {
 685   m_fileHistory = OnCreateFileHistory();
 686   return TRUE;
 687 }
 688
 689 wxFileHistory *wxDocManager::OnCreateFileHistory(void)
 690 {
 691   return new wxFileHistory;
 692 }
 693
 694 void wxDocManager::OnFileClose(wxCommandEvent& WXUNUSED(event))
 695 {
 696   wxDocument *doc = GetCurrentDocument();
 697   if (!doc)
 698     return;
 699   if (doc->Close())
 700   {
 701     doc->DeleteAllViews();
 702     if (m_docs.Member(doc))
 703       delete doc;
 704   }
 705 }
 706
 707 void wxDocManager::OnFileNew(wxCommandEvent& WXUNUSED(event))
 708 {
 709   CreateDocument(wxString(""), wxDOC_NEW);
 710 }
 711
 712 void wxDocManager::OnFileOpen(wxCommandEvent& WXUNUSED(event))
 713 {
 714   CreateDocument(wxString(""), 0);
 715 }
 716
 717 void wxDocManager::OnFileRevert(wxCommandEvent& WXUNUSED(event))
 718 {
 719   wxDocument *doc = GetCurrentDocument();
 720   if (!doc)
 721     return;
 722   doc->Revert();
 723 }
 724
 725 void wxDocManager::OnFileSave(wxCommandEvent& WXUNUSED(event))
 726 {
 727   wxDocument *doc = GetCurrentDocument();
 728   if (!doc)
 729     return;
 730   doc->Save();
 731 }
 732
 733 void wxDocManager::OnFileSaveAs(wxCommandEvent& WXUNUSED(event))
 734 {
 735   wxDocument *doc = GetCurrentDocument();
 736   if (!doc)
 737     return;
 738   doc->SaveAs();
 739 }
 740
 741 void wxDocManager::OnPrint(wxCommandEvent& WXUNUSED(event))
 742 {
 743   wxView *view = GetCurrentView();
 744   if (!view)
 745     return;
 746
 747   wxPrintout *printout = view->OnCreatePrintout();
 748   if (printout)
 749   {
 750     wxPrinter printer;
 751     printer.Print(view->GetFrame(), printout, TRUE);
 752
 753     delete printout;
 754   }
 755 }
 756
 757 void wxDocManager::OnPrintSetup(wxCommandEvent& WXUNUSED(event))
 758 {
 759   wxWindow *parentWin = wxTheApp->GetTopWindow();
 760   wxView *view = GetCurrentView();
 761   if (view)
 762     parentWin = view->GetFrame();
 763
 764   wxPrintData data;
 765
 766   wxPrintDialog printerDialog(parentWin, & data);
 767   printerDialog.GetPrintData().SetSetupDialog(TRUE);
 768   printerDialog.ShowModal();
 769 }
 770
 771 void wxDocManager::OnPreview(wxCommandEvent& WXUNUSED(event))
 772 {
 773   wxView *view = GetCurrentView();
 774   if (!view)
 775     return;
 776
 777   wxPrintout *printout = view->OnCreatePrintout();
 778   if (printout)
 779   {
 780     // Pass two printout objects: for preview, and possible printing.
 781     wxPrintPreviewBase *preview = (wxPrintPreviewBase *) NULL;
 782     preview = new wxPrintPreview(printout, view->OnCreatePrintout());
 783
 784     wxPreviewFrame *frame = new wxPreviewFrame(preview, (wxFrame *)wxTheApp->GetTopWindow(), _("Print Preview"),
 785                 wxPoint(100, 100), wxSize(600, 650));
 786     frame->Centre(wxBOTH);
 787     frame->Initialize();
 788     frame->Show(TRUE);
 789   }
 790 }
 791
 792 void wxDocManager::OnUndo(wxCommandEvent& WXUNUSED(event))
 793 {
 794   wxDocument *doc = GetCurrentDocument();
 795   if (!doc)
 796     return;
 797   if (doc->GetCommandProcessor())
 798     doc->GetCommandProcessor()->Undo();
 799 }
 800
 801 void wxDocManager::OnRedo(wxCommandEvent& WXUNUSED(event))
 802 {
 803   wxDocument *doc = GetCurrentDocument();
 804   if (!doc)
 805     return;
 806   if (doc->GetCommandProcessor())
 807     doc->GetCommandProcessor()->Redo();
 808 }
 809
 810 wxView *wxDocManager::GetCurrentView(void) const
 811 {
 812     if (m_currentView)
 813         return m_currentView;
 814     if (m_docs.Number() == 1)
 815     {
 816         wxDocument* doc = (wxDocument*) m_docs.First()->Data();
 817         return doc->GetFirstView();
 818     }
 819     return (wxView *) NULL;
 820 }
 821
 822 // Extend event processing to search the view's event table
 823 bool wxDocManager::ProcessEvent(wxEvent& event)
 824 {
 825     wxView* view = GetCurrentView();
 826     if (view)
 827     {
 828         if (view->ProcessEvent(event))
 829             return TRUE;
 830     }
 831     return wxEvtHandler::ProcessEvent(event);
 832 }
 833
 834 wxDocument *wxDocManager::CreateDocument(const wxString& path, long flags)
 835 {
 836   wxDocTemplate **templates = new wxDocTemplate *[m_templates.Number()];
 837   int i;
 838   int n = 0;
 839   for (i = 0; i < m_templates.Number(); i++)
 840   {
 841     wxDocTemplate *temp = (wxDocTemplate *)(m_templates.Nth(i)->Data());
 842     if (temp->IsVisible())
 843     {
 844       templates[n] = temp;
 845       n ++;
 846     }
 847   }
 848   if (n == 0)
 849   {
 850     delete[] templates;
 851     return (wxDocument *) NULL;
 852   }
 853
 854   // If we've reached the max number of docs, close the
 855   // first one.
 856   if (GetDocuments().Number() >= m_maxDocsOpen)
 857   {
 858     wxDocument *doc = (wxDocument *)GetDocuments().First()->Data();
 859     if (doc->Close())
 860     {
 861       // Implicitly deletes the document when
 862       // the last view is deleted
 863       doc->DeleteAllViews();
 864
 865       // Check we're really deleted
 866       if (m_docs.Member(doc))
 867         delete doc;
 868     }
 869     else
 870       return (wxDocument *) NULL;
 871   }
 872
 873   // New document: user chooses a template, unless there's only one.
 874   if (flags & wxDOC_NEW)
 875   {
 876     if (n == 1)
 877     {
 878       wxDocTemplate *temp = templates[0];
 879       delete[] templates;
 880       wxDocument *newDoc = temp->CreateDocument(path, flags);
 881       if (newDoc)
 882       {
 883         newDoc->SetDocumentName(temp->GetDocumentName());
 884         newDoc->SetDocumentTemplate(temp);
 885         newDoc->OnNewDocument();
 886       }
 887       return newDoc;
 888     }
 889
 890     wxDocTemplate *temp = SelectDocumentType(templates, n);
 891     delete[] templates;
 892     if (temp)
 893     {
 894       wxDocument *newDoc = temp->CreateDocument(path, flags);
 895       if (newDoc)
 896       {
 897         newDoc->SetDocumentName(temp->GetDocumentName());
 898         newDoc->SetDocumentTemplate(temp);
 899         newDoc->OnNewDocument();
 900       }
 901       return newDoc;
 902     }
 903     else
 904       return (wxDocument *) NULL;
 905   }
 906
 907   // Existing document
 908   wxDocTemplate *temp = (wxDocTemplate *) NULL;
 909
 910   wxString path2("");
 911   if (path != "")
 912     path2 = path;
 913
 914   if (flags & wxDOC_SILENT)
 915     temp = FindTemplateForPath(path2);
 916   else
 917     temp = SelectDocumentPath(templates, n, path2, flags);
 918
 919   delete[] templates;
 920
 921   if (temp)
 922   {
 923     wxDocument *newDoc = temp->CreateDocument(path2, flags);
 924     if (newDoc)
 925     {
 926       newDoc->SetDocumentName(temp->GetDocumentName());
 927       newDoc->SetDocumentTemplate(temp);
 928       if (!newDoc->OnOpenDocument(path2))
 929       {
 930         delete newDoc;
 931         return (wxDocument *) NULL;
 932       }
 933       AddFileToHistory(path2);
 934     }
 935     return newDoc;
 936   }
 937   else
 938     return (wxDocument *) NULL;
 939 }
 940
 941 wxView *wxDocManager::CreateView(wxDocument *doc, long flags)
 942 {
 943   wxDocTemplate **templates = new wxDocTemplate *[m_templates.Number()];
 944   int n =0;
 945   int i;
 946   for (i = 0; i < m_templates.Number(); i++)
 947   {
 948     wxDocTemplate *temp = (wxDocTemplate *)(m_templates.Nth(i)->Data());
 949     if (temp->IsVisible())
 950     {
 951       if (temp->GetDocumentName() == doc->GetDocumentName())
 952       {
 953         templates[n] = temp;
 954         n ++;
 955       }
 956     }
 957   }
 958   if (n == 0)
 959   {
 960     delete[] templates;
 961     return (wxView *) NULL;
 962   }
 963   if (n == 1)
 964   {
 965     wxDocTemplate *temp = templates[0];
 966     delete[] templates;
 967     wxView *view = temp->CreateView(doc, flags);
 968     if (view)
 969       view->SetViewName(temp->GetViewName());
 970     return view;
 971   }
 972
 973   wxDocTemplate *temp = SelectViewType(templates, n);
 974   delete[] templates;
 975   if (temp)
 976   {
 977     wxView *view = temp->CreateView(doc, flags);
 978     if (view)
 979       view->SetViewName(temp->GetViewName());
 980     return view;
 981   }
 982   else
 983     return (wxView *) NULL;
 984 }
 985
 986 // Not yet implemented
 987 void wxDocManager::DeleteTemplate(wxDocTemplate *WXUNUSED(temp), long WXUNUSED(flags))
 988 {
 989 }
 990
 991 // Not yet implemented
 992 bool wxDocManager::FlushDoc(wxDocument *WXUNUSED(doc))
 993 {
 994   return FALSE;
 995 }
 996
 997 wxDocument *wxDocManager::GetCurrentDocument(void) const
 998 {
 999   if (m_currentView)
1000     return m_currentView->GetDocument();
1001   else
1002     return (wxDocument *) NULL;
1003 }
1004
1005 // Make a default document name
1006 bool wxDocManager::MakeDefaultName(wxString& name)
1007 {
1008   name.Printf(_("unnamed%d"), m_defaultDocumentNameCounter);
1009   m_defaultDocumentNameCounter++;
1010
1011   return TRUE;
1012 }
1013
1014 // Not yet implemented
1015 wxDocTemplate *wxDocManager::MatchTemplate(const wxString& WXUNUSED(path))
1016 {
1017   return (wxDocTemplate *) NULL;
1018 }
1019
1020 // File history management
1021 void wxDocManager::AddFileToHistory(const wxString& file)
1022 {
1023   if (m_fileHistory)
1024     m_fileHistory->AddFileToHistory(file);
1025 }
1026
1027 wxString wxDocManager::GetHistoryFile(int i) const
1028 {
1029   if (m_fileHistory)
1030     return wxString(m_fileHistory->GetHistoryFile(i));
1031   else
1032     return wxString("");
1033 }
1034
1035 void wxDocManager::FileHistoryUseMenu(wxMenu *menu)
1036 {
1037   if (m_fileHistory)
1038     m_fileHistory->UseMenu(menu);
1039 }
1040
1041 void wxDocManager::FileHistoryRemoveMenu(wxMenu *menu)
1042 {
1043   if (m_fileHistory)
1044     m_fileHistory->RemoveMenu(menu);
1045 }
1046
1047 #if wxUSE_CONFIG
1048 void wxDocManager::FileHistoryLoad(wxConfigBase& config)
1049 {
1050   if (m_fileHistory)
1051     m_fileHistory->Load(config);
1052 }
1053
1054 void wxDocManager::FileHistorySave(wxConfigBase& config)
1055 {
1056   if (m_fileHistory)
1057     m_fileHistory->Save(config);
1058 }
1059 #endif
1060
1061 void wxDocManager::FileHistoryAddFilesToMenu(wxMenu* menu)
1062 {
1063   if (m_fileHistory)
1064     m_fileHistory->AddFilesToMenu(menu);
1065 }
1066
1067 void wxDocManager::FileHistoryAddFilesToMenu()
1068 {
1069   if (m_fileHistory)
1070     m_fileHistory->AddFilesToMenu();
1071 }
1072
1073 int wxDocManager::GetNoHistoryFiles(void) const
1074 {
1075   if (m_fileHistory)
1076     return m_fileHistory->GetNoHistoryFiles();
1077   else
1078     return 0;
1079 }
1080
1081 static char *FindExtension(char *path)
1082 {
1083   static char ext[10];
1084   int len = strlen(path);
1085   if (path)
1086   {
1087     int i = 0;
1088     for (i = (len-1); i > 0; i --)
1089       if (path[i] == '.')
1090         break;
1091     if (path[i] == '.')
1092     {
1093       int j;
1094       for (j = i+1; j < len; j++)
1095         ext[(int)(j-(i+1))] = (char)wxToLower(path[j]); // NOTE Should not use tolower under UNIX
1096       ext[j-(i+1)] = 0;
1097       return ext;
1098     }
1099     else
1100       return (char *) NULL;
1101   }
1102   else return (char *) NULL;
1103 }
1104
1105
1106 // Given a path, try to find a matching template. Won't
1107 // always work, of course.
1108 wxDocTemplate *wxDocManager::FindTemplateForPath(const wxString& path)
1109 {
1110   char *theExt = FindExtension((char *)(const char *)path);
1111   if (!theExt)
1112     return (wxDocTemplate *) NULL;
1113   wxDocTemplate *theTemplate = (wxDocTemplate *) NULL;
1114
1115   if (m_templates.Number() == 1)
1116     return (wxDocTemplate *)m_templates.First()->Data();
1117
1118   // Find the template which this extension corresponds to
1119   int i;
1120   for (i = 0; i < m_templates.Number(); i++)
1121   {
1122     wxDocTemplate *temp = (wxDocTemplate *)m_templates.Nth(i)->Data();
1123     if (strcmp(temp->GetDefaultExtension(), theExt) == 0)
1124     {
1125       theTemplate = temp;
1126       break;
1127     }
1128   }
1129   return theTemplate;
1130 }
1131
1132 // Prompts user to open a file, using file specs in templates.
1133 // How to implement in wxWindows? Must extend the file selector
1134 // dialog or implement own; OR match the extension to the
1135 // template extension.
1136
1137 #ifdef __WXMSW__
1138 wxDocTemplate *wxDocManager::SelectDocumentPath(wxDocTemplate **templates,
1139     int noTemplates, wxString& path, long WXUNUSED(flags), bool WXUNUSED(save))
1140 #else
1141 wxDocTemplate *wxDocManager::SelectDocumentPath(wxDocTemplate **WXUNUSED(templates),
1142     int WXUNUSED(noTemplates), wxString& path, long WXUNUSED(flags), bool WXUNUSED(save))
1143 #endif
1144 {
1145   // We can only have multiple filters in Windows
1146 #ifdef __WXMSW__
1147   char *descrBuf = new char[1000];  // FIXME static buffer
1148   descrBuf[0] = 0;
1149   int i;
1150   for (i = 0; i < noTemplates; i++)
1151   {
1152     if (templates[i]->IsVisible())
1153     {
1154       strcat(descrBuf, templates[i]->GetDescription());
1155       strcat(descrBuf, " (");
1156       strcat(descrBuf, templates[i]->GetFileFilter());
1157       strcat(descrBuf, ") ");
1158       strcat(descrBuf, "|");
1159       strcat(descrBuf, templates[i]->GetFileFilter());
1160       strcat(descrBuf, "|");
1161     }
1162   }
1163   int len = strlen(descrBuf);
1164   if (len > 0)
1165     // Omit final "|"
1166     descrBuf[len-1] = 0;
1167 #else
1168   char* descrBuf = copystring("*.*");
1169 #endif
1170
1171   char *pathTmp = wxFileSelector(_("Select a file"), "", "", "", descrBuf, 0, wxTheApp->GetTopWindow());
1172   delete[] descrBuf;
1173   if (pathTmp)
1174   {
1175     path = pathTmp;
1176     char *theExt = FindExtension((char *)(const char *)path);
1177     if (!theExt)
1178       return (wxDocTemplate *) NULL;
1179
1180     // This is dodgy in that we're selecting the template on the
1181     // basis of the file extension, which may not be a standard
1182     // one. We really want to know exactly which template was
1183     // chosen by using a more advanced file selector.
1184     wxDocTemplate *theTemplate = FindTemplateForPath(path);
1185     return theTemplate;
1186   }
1187   else
1188   {
1189     path = "";
1190     return (wxDocTemplate *) NULL;
1191   }
1192 #if 0
1193   // In all other windowing systems, until we have more advanced
1194   // file selectors, we must select the document type (template) first, and
1195   // _then_ pop up the file selector.
1196   wxDocTemplate *temp = SelectDocumentType(templates, noTemplates);
1197   if (!temp)
1198     return (wxDocTemplate *) NULL;
1199
1200   char *pathTmp = wxFileSelector(_("Select a file"), "", "",
1201      temp->GetDefaultExtension(),
1202      temp->GetFileFilter(),
1203      0, wxTheApp->GetTopWindow());
1204
1205   if (pathTmp)
1206   {
1207     path = pathTmp;
1208     return temp;
1209   }
1210   else
1211     return (wxDocTemplate *) NULL;
1212 #endif
1213 }
1214
1215 wxDocTemplate *wxDocManager::SelectDocumentType(wxDocTemplate **templates,
1216     int noTemplates)
1217 {
1218   char **strings = new char *[noTemplates];
1219   char **data = new char *[noTemplates];
1220   int i;
1221   int n = 0;
1222   for (i = 0; i < noTemplates; i++)
1223   {
1224     if (templates[i]->IsVisible())
1225     {
1226       strings[n] = WXSTRINGCAST templates[i]->m_description;
1227       data[n] = (char *)templates[i];
1228       n ++;
1229     }
1230   }
1231   if (n == 0)
1232   {
1233     delete[] strings;
1234     delete[] data;
1235     return (wxDocTemplate *) NULL;
1236   }
1237   else if (n == 1)
1238   {
1239     wxDocTemplate *temp = (wxDocTemplate *)data[0];
1240     delete[] strings;
1241     delete[] data;
1242     return temp;
1243   }
1244
1245   wxDocTemplate *theTemplate = (wxDocTemplate *)wxGetSingleChoiceData(_("Select a document template"), _("Templates"), n,
1246     strings, data);
1247   delete[] strings;
1248   delete[] data;
1249   return theTemplate;
1250 }
1251
1252 wxDocTemplate *wxDocManager::SelectViewType(wxDocTemplate **templates,
1253     int noTemplates)
1254 {
1255   char **strings = new char *[noTemplates];
1256   char **data = new char *[noTemplates];
1257   int i;
1258   int n = 0;
1259   for (i = 0; i < noTemplates; i++)
1260   {
1261     if (templates[i]->IsVisible() && (templates[i]->GetViewName() != ""))
1262     {
1263       strings[n] = WXSTRINGCAST templates[i]->m_viewTypeName;
1264       data[n] = (char *)templates[i];
1265       n ++;
1266     }
1267   }
1268   wxDocTemplate *theTemplate = (wxDocTemplate *)wxGetSingleChoiceData(_("Select a document view"), _("Views"), n,
1269     strings, data);
1270   delete[] strings;
1271   delete[] data;
1272   return theTemplate;
1273 }
1274
1275 void wxDocManager::AssociateTemplate(wxDocTemplate *temp)
1276 {
1277   if (!m_templates.Member(temp))
1278     m_templates.Append(temp);
1279 }
1280
1281 void wxDocManager::DisassociateTemplate(wxDocTemplate *temp)
1282 {
1283   m_templates.DeleteObject(temp);
1284 }
1285
1286 // Add and remove a document from the manager's list
1287 void wxDocManager::AddDocument(wxDocument *doc)
1288 {
1289   if (!m_docs.Member(doc))
1290     m_docs.Append(doc);
1291 }
1292
1293 void wxDocManager::RemoveDocument(wxDocument *doc)
1294 {
1295   m_docs.DeleteObject(doc);
1296 }
1297
1298 // Views or windows should inform the document manager
1299 // when a view is going in or out of focus
1300 void wxDocManager::ActivateView(wxView *view, bool activate, bool WXUNUSED(deleting))
1301 {
1302   // If we're deactiving, and if we're not actually deleting the view, then
1303   // don't reset the current view because we may be going to
1304   // a window without a view.
1305   // WHAT DID I MEAN BY THAT EXACTLY?
1306 /*
1307   if (deleting)
1308   {
1309     if (m_currentView == view)
1310       m_currentView = NULL;
1311   }
1312   else
1313 */
1314   {
1315     if (activate)
1316       m_currentView = view;
1317     else
1318       m_currentView = (wxView *) NULL;
1319   }
1320 }
1321
1322 /*
1323  * Default document child frame
1324  */
1325
1326 BEGIN_EVENT_TABLE(wxDocChildFrame, wxFrame)
1327     EVT_ACTIVATE(wxDocChildFrame::OnActivate)
1328     EVT_CLOSE(wxDocChildFrame::OnCloseWindow)
1329 END_EVENT_TABLE()
1330
1331 wxDocChildFrame::wxDocChildFrame(wxDocument *doc, wxView *view, wxFrame *frame, wxWindowID id, const wxString& title,
1332   const wxPoint& pos, const wxSize& size, long style, const wxString& name):
1333     wxFrame(frame, id, title, pos, size, style, name)
1334 {
1335   m_childDocument = doc;
1336   m_childView = view;
1337   if (view)
1338     view->SetFrame(this);
1339 }
1340
1341 wxDocChildFrame::~wxDocChildFrame(void)
1342 {
1343 }
1344
1345 // Extend event processing to search the view's event table
1346 bool wxDocChildFrame::ProcessEvent(wxEvent& event)
1347 {
1348     if (m_childView)
1349         m_childView->Activate(TRUE);
1350
1351         if ( !m_childView || ! m_childView->ProcessEvent(event) )
1352     {
1353         // Only hand up to the parent if it's a menu command
1354         if (!event.IsKindOf(CLASSINFO(wxCommandEvent)) || !GetParent() || !GetParent()->ProcessEvent(event))
1355                     return wxEvtHandler::ProcessEvent(event);
1356         else
1357             return TRUE;
1358     }
1359         else
1360                 return TRUE;
1361 }
1362
1363 void wxDocChildFrame::OnActivate(wxActivateEvent& event)
1364 {
1365   wxFrame::OnActivate(event);
1366
1367   if (m_childView)
1368     m_childView->Activate(event.GetActive());
1369 }
1370
1371 void wxDocChildFrame::OnCloseWindow(wxCloseEvent& event)
1372 {
1373   if (m_childView)
1374   {
1375     bool ans = FALSE;
1376     if (!event.CanVeto())
1377       ans = TRUE; // Must delete.
1378     else
1379       ans = m_childView->Close(FALSE); // FALSE means don't delete associated window
1380
1381     if (ans)
1382     {
1383       m_childView->Activate(FALSE);
1384       delete m_childView;
1385       m_childView = (wxView *) NULL;
1386       m_childDocument = (wxDocument *) NULL;
1387
1388       this->Destroy();
1389     }
1390     else
1391       event.Veto();
1392   }
1393   else
1394     event.Veto();
1395 }
1396
1397 /*
1398  * Default parent frame
1399  */
1400
1401 BEGIN_EVENT_TABLE(wxDocParentFrame, wxFrame)
1402     EVT_MENU(wxID_EXIT, wxDocParentFrame::OnExit)
1403     EVT_MENU_RANGE(wxID_FILE1, wxID_FILE9, wxDocParentFrame::OnMRUFile)
1404     EVT_CLOSE(wxDocParentFrame::OnCloseWindow)
1405 END_EVENT_TABLE()
1406
1407 wxDocParentFrame::wxDocParentFrame(wxDocManager *manager, wxFrame *frame, wxWindowID id, const wxString& title,
1408   const wxPoint& pos, const wxSize& size, long style, const wxString& name):
1409   wxFrame(frame, id, title, pos, size, style, name)
1410 {
1411   m_docManager = manager;
1412 }
1413
1414 void wxDocParentFrame::OnExit(wxCommandEvent& WXUNUSED(event))
1415 {
1416     Close();
1417 }
1418
1419 void wxDocParentFrame::OnMRUFile(wxCommandEvent& event)
1420 {
1421       wxString f(m_docManager->GetHistoryFile(event.GetSelection() - wxID_FILE1));
1422       if (f != "")
1423         (void)m_docManager->CreateDocument(f, wxDOC_SILENT);
1424 }
1425
1426 // Extend event processing to search the view's event table
1427 bool wxDocParentFrame::ProcessEvent(wxEvent& event)
1428 {
1429     // Try the document manager, then do default processing
1430     if (!m_docManager || !m_docManager->ProcessEvent(event))
1431         return wxEvtHandler::ProcessEvent(event);
1432     else
1433         return TRUE;
1434 }
1435
1436 // Define the behaviour for the frame closing
1437 // - must delete all frames except for the main one.
1438 void wxDocParentFrame::OnCloseWindow(wxCloseEvent& event)
1439 {
1440   if (m_docManager->Clear(!event.CanVeto()))
1441   {
1442     this->Destroy();
1443   }
1444   else
1445     event.Veto();
1446 }
1447
1448 #if wxUSE_PRINTING_ARCHITECTURE
1449
1450 wxDocPrintout::wxDocPrintout(wxView *view, const wxString& title):
1451   wxPrintout(WXSTRINGCAST title)
1452 {
1453   m_printoutView = view;
1454 }
1455
1456 bool wxDocPrintout::OnPrintPage(int WXUNUSED(page))
1457 {
1458   wxDC *dc = GetDC();
1459
1460   // Get the logical pixels per inch of screen and printer
1461   int ppiScreenX, ppiScreenY;
1462   GetPPIScreen(&ppiScreenX, &ppiScreenY);
1463   int ppiPrinterX, ppiPrinterY;
1464   GetPPIPrinter(&ppiPrinterX, &ppiPrinterY);
1465
1466   // This scales the DC so that the printout roughly represents the
1467   // the screen scaling. The text point size _should_ be the right size
1468   // but in fact is too small for some reason. This is a detail that will
1469   // need to be addressed at some point but can be fudged for the
1470   // moment.
1471   float scale = (float)((float)ppiPrinterX/(float)ppiScreenX);
1472
1473   // Now we have to check in case our real page size is reduced
1474   // (e.g. because we're drawing to a print preview memory DC)
1475   int pageWidth, pageHeight;
1476   int w, h;
1477   dc->GetSize(&w, &h);
1478   GetPageSizePixels(&pageWidth, &pageHeight);
1479
1480   // If printer pageWidth == current DC width, then this doesn't
1481   // change. But w might be the preview bitmap width, so scale down.
1482   float overallScale = scale * (float)(w/(float)pageWidth);
1483   dc->SetUserScale(overallScale, overallScale);
1484
1485   if (m_printoutView)
1486   {
1487     m_printoutView->OnDraw(dc);
1488   }
1489   return TRUE;
1490 }
1491
1492 bool wxDocPrintout::HasPage(int pageNum)
1493 {
1494   return (pageNum == 1);
1495 }
1496
1497 bool wxDocPrintout::OnBeginDocument(int startPage, int endPage)
1498 {
1499   if (!wxPrintout::OnBeginDocument(startPage, endPage))
1500     return FALSE;
1501
1502   return TRUE;
1503 }
1504
1505 void wxDocPrintout::GetPageInfo(int *minPage, int *maxPage, int *selPageFrom, int *selPageTo)
1506 {
1507   *minPage = 1;
1508   *maxPage = 1;
1509   *selPageFrom = 1;
1510   *selPageTo = 1;
1511 }
1512
1513 #endif
1514
1515 /*
1516  * Command processing framework
1517  */
1518
1519 wxCommand::wxCommand(bool canUndoIt, const wxString& name)
1520 {
1521   m_canUndo = canUndoIt;
1522   m_commandName = name;
1523 }
1524
1525 wxCommand::~wxCommand(void)
1526 {
1527 }
1528
1529 // Command processor
1530 wxCommandProcessor::wxCommandProcessor(int maxCommands)
1531 {
1532   m_maxNoCommands = maxCommands;
1533   m_currentCommand = (wxNode *) NULL;
1534   m_commandEditMenu = (wxMenu *) NULL;
1535 }
1536
1537 wxCommandProcessor::~wxCommandProcessor(void)
1538 {
1539   ClearCommands();
1540 }
1541
1542 // Pass a command to the processor. The processor calls Do();
1543 // if successful, is appended to the command history unless
1544 // storeIt is FALSE.
1545 bool wxCommandProcessor::Submit(wxCommand *command, bool storeIt)
1546 {
1547   bool success = command->Do();
1548   if (success && storeIt)
1549   {
1550     if (m_commands.Number() == m_maxNoCommands)
1551     {
1552       wxNode *firstNode = m_commands.First();
1553       wxCommand *firstCommand = (wxCommand *)firstNode->Data();
1554       delete firstCommand;
1555       delete firstNode;
1556     }
1557
1558     // Correct a bug: we must chop off the current 'branch'
1559     // so that we're at the end of the command list.
1560     if (!m_currentCommand)
1561       ClearCommands();
1562     else
1563     {
1564       wxNode *node = m_currentCommand->Next();
1565       while (node)
1566       {
1567         wxNode *next = node->Next();
1568         delete (wxCommand *)node->Data();
1569         delete node;
1570         node = next;
1571       }
1572     }
1573
1574     m_commands.Append(command);
1575     m_currentCommand = m_commands.Last();
1576     SetMenuStrings();
1577   }
1578   return success;
1579 }
1580
1581 bool wxCommandProcessor::Undo(void)
1582 {
1583   if (m_currentCommand)
1584   {
1585     wxCommand *command = (wxCommand *)m_currentCommand->Data();
1586     if (command->CanUndo())
1587     {
1588       bool success = command->Undo();
1589       if (success)
1590       {
1591         m_currentCommand = m_currentCommand->Previous();
1592         SetMenuStrings();
1593         return TRUE;
1594       }
1595     }
1596   }
1597   return FALSE;
1598 }
1599
1600 bool wxCommandProcessor::Redo(void)
1601 {
1602   wxCommand *redoCommand = (wxCommand *) NULL;
1603   wxNode *redoNode = (wxNode *) NULL;
1604   if (m_currentCommand && m_currentCommand->Next())
1605   {
1606     redoCommand = (wxCommand *)m_currentCommand->Next()->Data();
1607     redoNode = m_currentCommand->Next();
1608   }
1609   else
1610   {
1611     if (m_commands.Number() > 0)
1612     {
1613       redoCommand = (wxCommand *)m_commands.First()->Data();
1614       redoNode = m_commands.First();
1615     }
1616   }
1617
1618   if (redoCommand)
1619   {
1620     bool success = redoCommand->Do();
1621     if (success)
1622     {
1623       m_currentCommand = redoNode;
1624       SetMenuStrings();
1625       return TRUE;
1626     }
1627   }
1628   return FALSE;
1629 }
1630
1631 bool wxCommandProcessor::CanUndo(void) const
1632 {
1633   if (m_currentCommand)
1634     return ((wxCommand *)m_currentCommand->Data())->CanUndo();
1635   return FALSE;
1636 }
1637
1638 bool wxCommandProcessor::CanRedo(void) const
1639 {
1640     if ((m_currentCommand != (wxNode*) NULL) && (m_currentCommand->Next() == (wxNode*) NULL))
1641         return FALSE;
1642
1643     if ((m_currentCommand != (wxNode*) NULL) && (m_currentCommand->Next() != (wxNode*) NULL))
1644         return TRUE;
1645
1646     if ((m_currentCommand == (wxNode*) NULL) && (m_commands.Number() > 0))
1647         return TRUE;
1648
1649     return FALSE;
1650 }
1651
1652 void wxCommandProcessor::Initialize(void)
1653 {
1654   m_currentCommand = m_commands.Last();
1655   SetMenuStrings();
1656 }
1657
1658 void wxCommandProcessor::SetMenuStrings(void)
1659 {
1660   if (m_commandEditMenu)
1661   {
1662     wxString buf;
1663     if (m_currentCommand)
1664     {
1665       wxCommand *command = (wxCommand *)m_currentCommand->Data();
1666       wxString commandName(command->GetName());
1667       if (commandName == "") commandName = _("Unnamed command");
1668       bool canUndo = command->CanUndo();
1669       if (canUndo)
1670         buf = wxString(_("&Undo ")) + commandName;
1671       else
1672         buf = wxString(_("Can't &Undo ")) + commandName;
1673
1674       m_commandEditMenu->SetLabel(wxID_UNDO, buf);
1675       m_commandEditMenu->Enable(wxID_UNDO, canUndo);
1676
1677       // We can redo, if we're not at the end of the history.
1678       if (m_currentCommand->Next())
1679       {
1680         wxCommand *redoCommand = (wxCommand *)m_currentCommand->Next()->Data();
1681         wxString redoCommandName(redoCommand->GetName());
1682         if (redoCommandName == "") redoCommandName = _("Unnamed command");
1683         buf = wxString(_("&Redo ")) + redoCommandName;
1684         m_commandEditMenu->SetLabel(wxID_REDO, buf);
1685         m_commandEditMenu->Enable(wxID_REDO, TRUE);
1686       }
1687       else
1688       {
1689         m_commandEditMenu->SetLabel(wxID_REDO, _("&Redo"));
1690         m_commandEditMenu->Enable(wxID_REDO, FALSE);
1691       }
1692     }
1693     else
1694     {
1695       m_commandEditMenu->SetLabel(wxID_UNDO, _("&Undo"));
1696       m_commandEditMenu->Enable(wxID_UNDO, FALSE);
1697
1698       if (m_commands.Number() == 0)
1699       {
1700         m_commandEditMenu->SetLabel(wxID_REDO, _("&Redo"));
1701         m_commandEditMenu->Enable(wxID_REDO, FALSE);
1702       }
1703       else
1704       {
1705         // currentCommand is NULL but there are commands: this means that
1706         // we've undone to the start of the list, but can redo the first.
1707         wxCommand *redoCommand = (wxCommand *)m_commands.First()->Data();
1708         wxString redoCommandName(redoCommand->GetName());
1709         if (redoCommandName == "") redoCommandName = _("Unnamed command");
1710         buf = wxString(_("&Redo ")) + redoCommandName;
1711         m_commandEditMenu->SetLabel(wxID_REDO, buf);
1712         m_commandEditMenu->Enable(wxID_REDO, TRUE);
1713       }
1714     }
1715   }
1716 }
1717
1718 void wxCommandProcessor::ClearCommands(void)
1719 {
1720   wxNode *node = m_commands.First();
1721   while (node)
1722   {
1723     wxCommand *command = (wxCommand *)node->Data();
1724     delete command;
1725     delete node;
1726     node = m_commands.First();
1727   }
1728   m_currentCommand = (wxNode *) NULL;
1729 }
1730
1731
1732 /*
1733  * File history processor
1734  */
1735
1736 wxFileHistory::wxFileHistory(int maxFiles)
1737 {
1738   m_fileMaxFiles = maxFiles;
1739   m_fileHistoryN = 0;
1740   m_fileHistory = new char *[m_fileMaxFiles];
1741 }
1742
1743 wxFileHistory::~wxFileHistory(void)
1744 {
1745   int i;
1746   for (i = 0; i < m_fileHistoryN; i++)
1747     delete[] m_fileHistory[i];
1748   delete[] m_fileHistory;
1749 }
1750
1751 // File history management
1752 void wxFileHistory::AddFileToHistory(const wxString& file)
1753 {
1754   int i;
1755   // Check we don't already have this file
1756   for (i = 0; i < m_fileHistoryN; i++)
1757   {
1758       if (m_fileHistory[i] && wxString(m_fileHistory[i]) == file)
1759           return;
1760   }
1761
1762   // Add to the project file history:
1763   // Move existing files (if any) down so we can insert file at beginning.
1764
1765   // First delete filename that has popped off the end of the array (if any)
1766   if (m_fileHistoryN == m_fileMaxFiles)
1767   {
1768     delete[] m_fileHistory[m_fileMaxFiles-1];
1769     m_fileHistory[m_fileMaxFiles-1] = (char *) NULL;
1770   }
1771   if (m_fileHistoryN < m_fileMaxFiles)
1772   {
1773     wxNode* node = m_fileMenus.First();
1774     while (node)
1775     {
1776         wxMenu* menu = (wxMenu*) node->Data();
1777         if (m_fileHistoryN == 0)
1778             menu->AppendSeparator();
1779         menu->Append(wxID_FILE1+m_fileHistoryN, _("[EMPTY]"));
1780         node = node->Next();
1781     }
1782     m_fileHistoryN ++;
1783   }
1784   // Shuffle filenames down
1785   for (i = (m_fileHistoryN-1); i > 0; i--)
1786   {
1787     m_fileHistory[i] = m_fileHistory[i-1];
1788   }
1789   m_fileHistory[0] = copystring(file);
1790
1791   for (i = 0; i < m_fileHistoryN; i++)
1792     if (m_fileHistory[i])
1793     {
1794       wxString buf;
1795       buf.Printf("&%d %s", i+1, m_fileHistory[i]);
1796       wxNode* node = m_fileMenus.First();
1797       while (node)
1798       {
1799         wxMenu* menu = (wxMenu*) node->Data();
1800         menu->SetLabel(wxID_FILE1+i, buf);
1801         node = node->Next();
1802       }
1803     }
1804 }
1805
1806 wxString wxFileHistory::GetHistoryFile(int i) const
1807 {
1808   if (i < m_fileHistoryN)
1809     return wxString(m_fileHistory[i]);
1810   else
1811     return wxString("");
1812 }
1813
1814 void wxFileHistory::UseMenu(wxMenu *menu)
1815 {
1816   if (!m_fileMenus.Member(menu))
1817     m_fileMenus.Append(menu);
1818 }
1819
1820 void wxFileHistory::RemoveMenu(wxMenu *menu)
1821 {
1822   m_fileMenus.DeleteObject(menu);
1823 }
1824
1825 #if wxUSE_CONFIG
1826 void wxFileHistory::Load(wxConfigBase& config)
1827 {
1828   m_fileHistoryN = 0;
1829   wxString buf;
1830   buf.Printf("file%d", m_fileHistoryN+1);
1831   wxString historyFile;
1832   while ((m_fileHistoryN <= m_fileMaxFiles) && config.Read(buf, &historyFile) && (historyFile != ""))
1833   {
1834     m_fileHistory[m_fileHistoryN] = copystring((const char*) historyFile);
1835     m_fileHistoryN ++;
1836     buf.Printf("file%d", m_fileHistoryN+1);
1837     historyFile = "";
1838   }
1839   AddFilesToMenu();
1840 }
1841
1842 void wxFileHistory::Save(wxConfigBase& config)
1843 {
1844   int i;
1845   for (i = 0; i < m_fileHistoryN; i++)
1846   {
1847     wxString buf;
1848     buf.Printf("file%d", i+1);
1849     config.Write(buf, wxString(m_fileHistory[i]));
1850   }
1851 }
1852 #endif
1853
1854 void wxFileHistory::AddFilesToMenu()
1855 {
1856     if (m_fileHistoryN > 0)
1857     {
1858         wxNode* node = m_fileMenus.First();
1859         while (node)
1860         {
1861             wxMenu* menu = (wxMenu*) node->Data();
1862             menu->AppendSeparator();
1863             int i;
1864             for (i = 0; i < m_fileHistoryN; i++)
1865             {
1866                 if (m_fileHistory[i])
1867                 {
1868                     wxString buf;
1869                     buf.Printf("&%d %s", i+1, m_fileHistory[i]);
1870                     menu->Append(wxID_FILE1+i, buf);
1871                 }
1872             }
1873             node = node->Next();
1874         }
1875     }
1876 }
1877
1878 void wxFileHistory::AddFilesToMenu(wxMenu* menu)
1879 {
1880     if (m_fileHistoryN > 0)
1881     {
1882         menu->AppendSeparator();
1883         int i;
1884         for (i = 0; i < m_fileHistoryN; i++)
1885         {
1886             if (m_fileHistory[i])
1887             {
1888                 wxString buf;
1889                 buf.Printf("&%d %s", i+1, m_fileHistory[i]);
1890                 menu->Append(wxID_FILE1+i, buf);
1891             }
1892         }
1893     }
1894 }
1895
1896 #if 0
1897 /*
1898  * wxPrintInfo
1899  */
1900
1901 wxPrintInfo::wxPrintInfo(void)
1902 {
1903   pageNumber = 1;
1904 }
1905
1906 wxPrintInfo::~wxPrintInfo(void)
1907 {
1908 }
1909 #endif
1910
1911 /*
1912  * Permits compatibility with existing file formats and functions
1913  * that manipulate files directly
1914  */
1915
1916 bool wxTransferFileToStream(const wxString& filename, ostream& stream)
1917 {
1918   FILE *fd1;
1919   int ch;
1920
1921   if ((fd1 = fopen (WXSTRINGCAST filename, "rb")) == NULL)
1922     return FALSE;
1923
1924   while ((ch = getc (fd1)) != EOF)
1925     stream << (unsigned char)ch;
1926
1927   fclose (fd1);
1928   return TRUE;
1929 }
1930
1931 bool wxTransferStreamToFile(istream& stream, const wxString& filename)
1932 {
1933   FILE *fd1;
1934   int ch;
1935
1936   if ((fd1 = fopen (WXSTRINGCAST filename, "wb")) == NULL)
1937     {
1938       return FALSE;
1939     }
1940
1941   while (!stream.eof())
1942   {
1943     ch = stream.get();
1944     if (!stream.eof())
1945       putc (ch, fd1);
1946   }
1947   fclose (fd1);
1948   return TRUE;
1949 }
1950
1951 #endif
1952   // End wxUSE_DOC_VIEW_ARCHITECTURE