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
1134 #ifdef __WXMSW__
1135 wxDocTemplate *wxDocManager::SelectDocumentPath(wxDocTemplate **templates,
1136     int noTemplates, wxString& path, long WXUNUSED(flags), bool WXUNUSED(save))
1137 #else
1138 wxDocTemplate *wxDocManager::SelectDocumentPath(wxDocTemplate **WXUNUSED(templates),
1139     int WXUNUSED(noTemplates), wxString& path, long WXUNUSED(flags), bool WXUNUSED(save))
1140 #endif
1141 {
1142   // We can only have multiple filters in Windows
1143 #ifdef __WXMSW__
1144   char *descrBuf = new char[1000];
1145   descrBuf[0] = 0;
1146   int i;
1147   for (i = 0; i < noTemplates; i++)
1148   {
1149     if (templates[i]->IsVisible())
1150     {
1151       strcat(descrBuf, templates[i]->GetDescription());
1152       strcat(descrBuf, " (");
1153       strcat(descrBuf, templates[i]->GetFileFilter());
1154       strcat(descrBuf, ") ");
1155       strcat(descrBuf, "|");
1156       strcat(descrBuf, templates[i]->GetFileFilter());
1157       strcat(descrBuf, "|");
1158     }
1159   }
1160   int len = strlen(descrBuf);
1161   if (len > 0)
1162     // Omit final "|"
1163     descrBuf[len-1] = 0;
1164 #else
1165   char* descrBuf = copystring("*.*");
1166 #endif
1167
1168   char *pathTmp = wxFileSelector(_("Select a file"), "", "", "", descrBuf, 0, wxTheApp->GetTopWindow());
1169   delete[] descrBuf;
1170   if (pathTmp)
1171   {
1172     path = pathTmp;
1173     char *theExt = FindExtension((char *)(const char *)path);
1174     if (!theExt)
1175       return (wxDocTemplate *) NULL;
1176
1177     // This is dodgy in that we're selecting the template on the
1178     // basis of the file extension, which may not be a standard
1179     // one. We really want to know exactly which template was
1180     // chosen by using a more advanced file selector.
1181     wxDocTemplate *theTemplate = FindTemplateForPath(path);
1182     return theTemplate;
1183   }
1184   else
1185   {
1186     path = "";
1187     return (wxDocTemplate *) NULL;
1188   }
1189 #if 0
1190   // In all other windowing systems, until we have more advanced
1191   // file selectors, we must select the document type (template) first, and
1192   // _then_ pop up the file selector.
1193   wxDocTemplate *temp = SelectDocumentType(templates, noTemplates);
1194   if (!temp)
1195     return (wxDocTemplate *) NULL;
1196
1197   char *pathTmp = wxFileSelector(_("Select a file"), "", "",
1198      temp->GetDefaultExtension(),
1199      temp->GetFileFilter(),
1200      0, wxTheApp->GetTopWindow());
1201
1202   if (pathTmp)
1203   {
1204     path = pathTmp;
1205     return temp;
1206   }
1207   else
1208     return (wxDocTemplate *) NULL;
1209 #endif
1210 }
1211
1212 wxDocTemplate *wxDocManager::SelectDocumentType(wxDocTemplate **templates,
1213     int noTemplates)
1214 {
1215   char **strings = new char *[noTemplates];
1216   char **data = new char *[noTemplates];
1217   int i;
1218   int n = 0;
1219   for (i = 0; i < noTemplates; i++)
1220   {
1221     if (templates[i]->IsVisible())
1222     {
1223       strings[n] = WXSTRINGCAST templates[i]->m_description;
1224       data[n] = (char *)templates[i];
1225       n ++;
1226     }
1227   }
1228   if (n == 0)
1229   {
1230     delete[] strings;
1231     delete[] data;
1232     return (wxDocTemplate *) NULL;
1233   }
1234   else if (n == 1)
1235   {
1236     wxDocTemplate *temp = (wxDocTemplate *)data[0];
1237     delete[] strings;
1238     delete[] data;
1239     return temp;
1240   }
1241
1242   wxDocTemplate *theTemplate = (wxDocTemplate *)wxGetSingleChoiceData(_("Select a document template"), _("Templates"), n,
1243     strings, data);
1244   delete[] strings;
1245   delete[] data;
1246   return theTemplate;
1247 }
1248
1249 wxDocTemplate *wxDocManager::SelectViewType(wxDocTemplate **templates,
1250     int noTemplates)
1251 {
1252   char **strings = new char *[noTemplates];
1253   char **data = new char *[noTemplates];
1254   int i;
1255   int n = 0;
1256   for (i = 0; i < noTemplates; i++)
1257   {
1258     if (templates[i]->IsVisible() && templates[i]->GetViewName())
1259     {
1260       strings[n] = WXSTRINGCAST templates[i]->m_viewTypeName;
1261       data[n] = (char *)templates[i];
1262       n ++;
1263     }
1264   }
1265   wxDocTemplate *theTemplate = (wxDocTemplate *)wxGetSingleChoiceData(_("Select a document view"), _("Views"), n,
1266     strings, data);
1267   delete[] strings;
1268   delete[] data;
1269   return theTemplate;
1270 }
1271
1272 void wxDocManager::AssociateTemplate(wxDocTemplate *temp)
1273 {
1274   if (!m_templates.Member(temp))
1275     m_templates.Append(temp);
1276 }
1277
1278 void wxDocManager::DisassociateTemplate(wxDocTemplate *temp)
1279 {
1280   m_templates.DeleteObject(temp);
1281 }
1282
1283 // Add and remove a document from the manager's list
1284 void wxDocManager::AddDocument(wxDocument *doc)
1285 {
1286   if (!m_docs.Member(doc))
1287     m_docs.Append(doc);
1288 }
1289
1290 void wxDocManager::RemoveDocument(wxDocument *doc)
1291 {
1292   m_docs.DeleteObject(doc);
1293 }
1294
1295 // Views or windows should inform the document manager
1296 // when a view is going in or out of focus
1297 void wxDocManager::ActivateView(wxView *view, bool activate, bool WXUNUSED(deleting))
1298 {
1299   // If we're deactiving, and if we're not actually deleting the view, then
1300   // don't reset the current view because we may be going to
1301   // a window without a view.
1302   // WHAT DID I MEAN BY THAT EXACTLY?
1303 /*
1304   if (deleting)
1305   {
1306     if (m_currentView == view)
1307       m_currentView = NULL;
1308   }
1309   else
1310 */
1311   {
1312     if (activate)
1313       m_currentView = view;
1314     else
1315       m_currentView = (wxView *) NULL;
1316   }
1317 }
1318
1319 /*
1320  * Default document child frame
1321  */
1322
1323 BEGIN_EVENT_TABLE(wxDocChildFrame, wxFrame)
1324     EVT_ACTIVATE(wxDocChildFrame::OnActivate)
1325     EVT_CLOSE(wxDocChildFrame::OnCloseWindow)
1326 END_EVENT_TABLE()
1327
1328 wxDocChildFrame::wxDocChildFrame(wxDocument *doc, wxView *view, wxFrame *frame, wxWindowID id, const wxString& title,
1329   const wxPoint& pos, const wxSize& size, long style, const wxString& name):
1330     wxFrame(frame, id, title, pos, size, style, name)
1331 {
1332   m_childDocument = doc;
1333   m_childView = view;
1334   if (view)
1335     view->SetFrame(this);
1336 }
1337
1338 wxDocChildFrame::~wxDocChildFrame(void)
1339 {
1340 }
1341
1342 // Extend event processing to search the view's event table
1343 bool wxDocChildFrame::ProcessEvent(wxEvent& event)
1344 {
1345     if (m_childView)
1346         m_childView->Activate(TRUE);
1347
1348         if ( !m_childView || ! m_childView->ProcessEvent(event) )
1349     {
1350         // Only hand up to the parent if it's a menu command
1351         if (!event.IsKindOf(CLASSINFO(wxCommandEvent)) || !GetParent() || !GetParent()->ProcessEvent(event))
1352                     return wxEvtHandler::ProcessEvent(event);
1353         else
1354             return TRUE;
1355     }
1356         else
1357                 return TRUE;
1358 }
1359
1360 void wxDocChildFrame::OnActivate(wxActivateEvent& event)
1361 {
1362   wxFrame::OnActivate(event);
1363
1364   if (m_childView)
1365     m_childView->Activate(event.GetActive());
1366 }
1367
1368 void wxDocChildFrame::OnCloseWindow(wxCloseEvent& event)
1369 {
1370   if (m_childView)
1371   {
1372     bool ans = FALSE;
1373     if (!event.CanVeto())
1374       ans = TRUE; // Must delete.
1375     else
1376       ans = m_childView->Close(FALSE); // FALSE means don't delete associated window
1377
1378     if (ans)
1379     {
1380       m_childView->Activate(FALSE);
1381       delete m_childView;
1382       m_childView = (wxView *) NULL;
1383       m_childDocument = (wxDocument *) NULL;
1384
1385       this->Destroy();
1386     }
1387     else
1388       event.Veto();
1389   }
1390   else
1391     event.Veto();
1392 }
1393
1394 /*
1395  * Default parent frame
1396  */
1397
1398 BEGIN_EVENT_TABLE(wxDocParentFrame, wxFrame)
1399     EVT_MENU(wxID_EXIT, wxDocParentFrame::OnExit)
1400     EVT_MENU_RANGE(wxID_FILE1, wxID_FILE9, wxDocParentFrame::OnMRUFile)
1401     EVT_CLOSE(wxDocParentFrame::OnCloseWindow)
1402 END_EVENT_TABLE()
1403
1404 wxDocParentFrame::wxDocParentFrame(wxDocManager *manager, wxFrame *frame, wxWindowID id, const wxString& title,
1405   const wxPoint& pos, const wxSize& size, long style, const wxString& name):
1406   wxFrame(frame, id, title, pos, size, style, name)
1407 {
1408   m_docManager = manager;
1409 }
1410
1411 void wxDocParentFrame::OnExit(wxCommandEvent& WXUNUSED(event))
1412 {
1413     Close();
1414 }
1415
1416 void wxDocParentFrame::OnMRUFile(wxCommandEvent& event)
1417 {
1418       wxString f(m_docManager->GetHistoryFile(event.GetSelection() - wxID_FILE1));
1419       if (f != "")
1420         (void)m_docManager->CreateDocument(f, wxDOC_SILENT);
1421 }
1422
1423 // Extend event processing to search the view's event table
1424 bool wxDocParentFrame::ProcessEvent(wxEvent& event)
1425 {
1426     // Try the document manager, then do default processing
1427     if (!m_docManager || !m_docManager->ProcessEvent(event))
1428         return wxEvtHandler::ProcessEvent(event);
1429     else
1430         return TRUE;
1431 }
1432
1433 // Define the behaviour for the frame closing
1434 // - must delete all frames except for the main one.
1435 void wxDocParentFrame::OnCloseWindow(wxCloseEvent& event)
1436 {
1437   if (m_docManager->Clear(!event.CanVeto()))
1438   {
1439     this->Destroy();
1440   }
1441   else
1442     event.Veto();
1443 }
1444
1445 #if wxUSE_PRINTING_ARCHITECTURE
1446
1447 wxDocPrintout::wxDocPrintout(wxView *view, const wxString& title):
1448   wxPrintout(WXSTRINGCAST title)
1449 {
1450   m_printoutView = view;
1451 }
1452
1453 bool wxDocPrintout::OnPrintPage(int WXUNUSED(page))
1454 {
1455   wxDC *dc = GetDC();
1456
1457   // Get the logical pixels per inch of screen and printer
1458   int ppiScreenX, ppiScreenY;
1459   GetPPIScreen(&ppiScreenX, &ppiScreenY);
1460   int ppiPrinterX, ppiPrinterY;
1461   GetPPIPrinter(&ppiPrinterX, &ppiPrinterY);
1462
1463   // This scales the DC so that the printout roughly represents the
1464   // the screen scaling. The text point size _should_ be the right size
1465   // but in fact is too small for some reason. This is a detail that will
1466   // need to be addressed at some point but can be fudged for the
1467   // moment.
1468   float scale = (float)((float)ppiPrinterX/(float)ppiScreenX);
1469
1470   // Now we have to check in case our real page size is reduced
1471   // (e.g. because we're drawing to a print preview memory DC)
1472   int pageWidth, pageHeight;
1473   int w, h;
1474   dc->GetSize(&w, &h);
1475   GetPageSizePixels(&pageWidth, &pageHeight);
1476
1477   // If printer pageWidth == current DC width, then this doesn't
1478   // change. But w might be the preview bitmap width, so scale down.
1479   float overallScale = scale * (float)(w/(float)pageWidth);
1480   dc->SetUserScale(overallScale, overallScale);
1481
1482   if (m_printoutView)
1483   {
1484     m_printoutView->OnDraw(dc);
1485   }
1486   return TRUE;
1487 }
1488
1489 bool wxDocPrintout::HasPage(int pageNum)
1490 {
1491   return (pageNum == 1);
1492 }
1493
1494 bool wxDocPrintout::OnBeginDocument(int startPage, int endPage)
1495 {
1496   if (!wxPrintout::OnBeginDocument(startPage, endPage))
1497     return FALSE;
1498
1499   return TRUE;
1500 }
1501
1502 void wxDocPrintout::GetPageInfo(int *minPage, int *maxPage, int *selPageFrom, int *selPageTo)
1503 {
1504   *minPage = 1;
1505   *maxPage = 1;
1506   *selPageFrom = 1;
1507   *selPageTo = 1;
1508 }
1509
1510 #endif
1511
1512 /*
1513  * Command processing framework
1514  */
1515
1516 wxCommand::wxCommand(bool canUndoIt, const wxString& name)
1517 {
1518   m_canUndo = canUndoIt;
1519   m_commandName = name;
1520 }
1521
1522 wxCommand::~wxCommand(void)
1523 {
1524 }
1525
1526 // Command processor
1527 wxCommandProcessor::wxCommandProcessor(int maxCommands)
1528 {
1529   m_maxNoCommands = maxCommands;
1530   m_currentCommand = (wxNode *) NULL;
1531   m_commandEditMenu = (wxMenu *) NULL;
1532 }
1533
1534 wxCommandProcessor::~wxCommandProcessor(void)
1535 {
1536   ClearCommands();
1537 }
1538
1539 // Pass a command to the processor. The processor calls Do();
1540 // if successful, is appended to the command history unless
1541 // storeIt is FALSE.
1542 bool wxCommandProcessor::Submit(wxCommand *command, bool storeIt)
1543 {
1544   bool success = command->Do();
1545   if (success && storeIt)
1546   {
1547     if (m_commands.Number() == m_maxNoCommands)
1548     {
1549       wxNode *firstNode = m_commands.First();
1550       wxCommand *firstCommand = (wxCommand *)firstNode->Data();
1551       delete firstCommand;
1552       delete firstNode;
1553     }
1554
1555     // Correct a bug: we must chop off the current 'branch'
1556     // so that we're at the end of the command list.
1557     if (!m_currentCommand)
1558       ClearCommands();
1559     else
1560     {
1561       wxNode *node = m_currentCommand->Next();
1562       while (node)
1563       {
1564         wxNode *next = node->Next();
1565         delete (wxCommand *)node->Data();
1566         delete node;
1567         node = next;
1568       }
1569     }
1570
1571     m_commands.Append(command);
1572     m_currentCommand = m_commands.Last();
1573     SetMenuStrings();
1574   }
1575   return success;
1576 }
1577
1578 bool wxCommandProcessor::Undo(void)
1579 {
1580   if (m_currentCommand)
1581   {
1582     wxCommand *command = (wxCommand *)m_currentCommand->Data();
1583     if (command->CanUndo())
1584     {
1585       bool success = command->Undo();
1586       if (success)
1587       {
1588         m_currentCommand = m_currentCommand->Previous();
1589         SetMenuStrings();
1590         return TRUE;
1591       }
1592     }
1593   }
1594   return FALSE;
1595 }
1596
1597 bool wxCommandProcessor::Redo(void)
1598 {
1599   wxCommand *redoCommand = (wxCommand *) NULL;
1600   wxNode *redoNode = (wxNode *) NULL;
1601   if (m_currentCommand && m_currentCommand->Next())
1602   {
1603     redoCommand = (wxCommand *)m_currentCommand->Next()->Data();
1604     redoNode = m_currentCommand->Next();
1605   }
1606   else
1607   {
1608     if (m_commands.Number() > 0)
1609     {
1610       redoCommand = (wxCommand *)m_commands.First()->Data();
1611       redoNode = m_commands.First();
1612     }
1613   }
1614
1615   if (redoCommand)
1616   {
1617     bool success = redoCommand->Do();
1618     if (success)
1619     {
1620       m_currentCommand = redoNode;
1621       SetMenuStrings();
1622       return TRUE;
1623     }
1624   }
1625   return FALSE;
1626 }
1627
1628 bool wxCommandProcessor::CanUndo(void) const
1629 {
1630   if (m_currentCommand)
1631     return ((wxCommand *)m_currentCommand->Data())->CanUndo();
1632   return FALSE;
1633 }
1634
1635 bool wxCommandProcessor::CanRedo(void) const
1636 {
1637     if ((m_currentCommand != (wxNode*) NULL) && (m_currentCommand->Next() == (wxNode*) NULL))
1638         return FALSE;
1639
1640     if ((m_currentCommand != (wxNode*) NULL) && (m_currentCommand->Next() != (wxNode*) NULL))
1641         return TRUE;
1642
1643     if ((m_currentCommand == (wxNode*) NULL) && (m_commands.Number() > 0))
1644         return TRUE;
1645
1646     return FALSE;
1647 }
1648
1649 void wxCommandProcessor::Initialize(void)
1650 {
1651   m_currentCommand = m_commands.Last();
1652   SetMenuStrings();
1653 }
1654
1655 void wxCommandProcessor::SetMenuStrings(void)
1656 {
1657   if (m_commandEditMenu)
1658   {
1659     wxString buf;
1660     if (m_currentCommand)
1661     {
1662       wxCommand *command = (wxCommand *)m_currentCommand->Data();
1663       wxString commandName(command->GetName());
1664       if (commandName == "") commandName = _("Unnamed command");
1665       bool canUndo = command->CanUndo();
1666       if (canUndo)
1667         buf = wxString(_("&Undo ")) + commandName;
1668       else
1669         buf = wxString(_("Can't &Undo ")) + commandName;
1670
1671       m_commandEditMenu->SetLabel(wxID_UNDO, buf);
1672       m_commandEditMenu->Enable(wxID_UNDO, canUndo);
1673
1674       // We can redo, if we're not at the end of the history.
1675       if (m_currentCommand->Next())
1676       {
1677         wxCommand *redoCommand = (wxCommand *)m_currentCommand->Next()->Data();
1678         wxString redoCommandName(redoCommand->GetName());
1679         if (redoCommandName == "") redoCommandName = _("Unnamed command");
1680         buf = wxString(_("&Redo ")) + redoCommandName;
1681         m_commandEditMenu->SetLabel(wxID_REDO, buf);
1682         m_commandEditMenu->Enable(wxID_REDO, TRUE);
1683       }
1684       else
1685       {
1686         m_commandEditMenu->SetLabel(wxID_REDO, _("&Redo"));
1687         m_commandEditMenu->Enable(wxID_REDO, FALSE);
1688       }
1689     }
1690     else
1691     {
1692       m_commandEditMenu->SetLabel(wxID_UNDO, _("&Undo"));
1693       m_commandEditMenu->Enable(wxID_UNDO, FALSE);
1694
1695       if (m_commands.Number() == 0)
1696       {
1697         m_commandEditMenu->SetLabel(wxID_REDO, _("&Redo"));
1698         m_commandEditMenu->Enable(wxID_REDO, FALSE);
1699       }
1700       else
1701       {
1702         // currentCommand is NULL but there are commands: this means that
1703         // we've undone to the start of the list, but can redo the first.
1704         wxCommand *redoCommand = (wxCommand *)m_commands.First()->Data();
1705         wxString redoCommandName(redoCommand->GetName());
1706         if (!redoCommandName) redoCommandName = _("Unnamed command");
1707         buf = wxString(_("&Redo ")) + redoCommandName;
1708         m_commandEditMenu->SetLabel(wxID_REDO, buf);
1709         m_commandEditMenu->Enable(wxID_REDO, TRUE);
1710       }
1711     }
1712   }
1713 }
1714
1715 void wxCommandProcessor::ClearCommands(void)
1716 {
1717   wxNode *node = m_commands.First();
1718   while (node)
1719   {
1720     wxCommand *command = (wxCommand *)node->Data();
1721     delete command;
1722     delete node;
1723     node = m_commands.First();
1724   }
1725   m_currentCommand = (wxNode *) NULL;
1726 }
1727
1728
1729 /*
1730  * File history processor
1731  */
1732
1733 wxFileHistory::wxFileHistory(int maxFiles)
1734 {
1735   m_fileMaxFiles = maxFiles;
1736   m_fileHistoryN = 0;
1737   m_fileHistory = new char *[m_fileMaxFiles];
1738 }
1739
1740 wxFileHistory::~wxFileHistory(void)
1741 {
1742   int i;
1743   for (i = 0; i < m_fileHistoryN; i++)
1744     delete[] m_fileHistory[i];
1745   delete[] m_fileHistory;
1746 }
1747
1748 // File history management
1749 void wxFileHistory::AddFileToHistory(const wxString& file)
1750 {
1751   int i;
1752   // Check we don't already have this file
1753   for (i = 0; i < m_fileHistoryN; i++)
1754   {
1755       if (m_fileHistory[i] && wxString(m_fileHistory[i]) == file)
1756           return;
1757   }
1758
1759   // Add to the project file history:
1760   // Move existing files (if any) down so we can insert file at beginning.
1761
1762   // First delete filename that has popped off the end of the array (if any)
1763   if (m_fileHistoryN == m_fileMaxFiles)
1764   {
1765     delete[] m_fileHistory[m_fileMaxFiles-1];
1766     m_fileHistory[m_fileMaxFiles-1] = (char *) NULL;
1767   }
1768   if (m_fileHistoryN < m_fileMaxFiles)
1769   {
1770     wxNode* node = m_fileMenus.First();
1771     while (node)
1772     {
1773         wxMenu* menu = (wxMenu*) node->Data();
1774         if (m_fileHistoryN == 0)
1775             menu->AppendSeparator();
1776         menu->Append(wxID_FILE1+m_fileHistoryN, _("[EMPTY]"));
1777         node = node->Next();
1778     }
1779     m_fileHistoryN ++;
1780   }
1781   // Shuffle filenames down
1782   for (i = (m_fileHistoryN-1); i > 0; i--)
1783   {
1784     m_fileHistory[i] = m_fileHistory[i-1];
1785   }
1786   m_fileHistory[0] = copystring(file);
1787
1788   for (i = 0; i < m_fileHistoryN; i++)
1789     if (m_fileHistory[i])
1790     {
1791       char buf[400];
1792       sprintf(buf, "&%d %s", i+1, m_fileHistory[i]);
1793       wxNode* node = m_fileMenus.First();
1794       while (node)
1795       {
1796         wxMenu* menu = (wxMenu*) node->Data();
1797         menu->SetLabel(wxID_FILE1+i, buf);
1798         node = node->Next();
1799       }
1800     }
1801 }
1802
1803 wxString wxFileHistory::GetHistoryFile(int i) const
1804 {
1805   if (i < m_fileHistoryN)
1806     return wxString(m_fileHistory[i]);
1807   else
1808     return wxString("");
1809 }
1810
1811 void wxFileHistory::UseMenu(wxMenu *menu)
1812 {
1813   if (!m_fileMenus.Member(menu))
1814     m_fileMenus.Append(menu);
1815 }
1816
1817 void wxFileHistory::RemoveMenu(wxMenu *menu)
1818 {
1819   m_fileMenus.DeleteObject(menu);
1820 }
1821
1822 void wxFileHistory::Load(wxConfigBase& config)
1823 {
1824   m_fileHistoryN = 0;
1825   char buf[400];
1826   sprintf(buf, "file%d", m_fileHistoryN+1);
1827   wxString historyFile("");
1828   while ((m_fileHistoryN <= m_fileMaxFiles) && config.Read(buf, &historyFile) && (historyFile != ""))
1829   {
1830     m_fileHistory[m_fileHistoryN] = copystring((const char*) historyFile);
1831     m_fileHistoryN ++;
1832     sprintf(buf, "file%d", m_fileHistoryN+1);
1833     historyFile = "";
1834   }
1835   AddFilesToMenu();
1836 }
1837
1838 void wxFileHistory::Save(wxConfigBase& config)
1839 {
1840   int i;
1841   for (i = 0; i < m_fileHistoryN; i++)
1842   {
1843     wxString buf;
1844     buf.Printf("file%d", i+1);
1845     config.Write(buf, wxString(m_fileHistory[i]));
1846   }
1847 }
1848
1849 void wxFileHistory::AddFilesToMenu()
1850 {
1851     if (m_fileHistoryN > 0)
1852     {
1853         wxNode* node = m_fileMenus.First();
1854         while (node)
1855         {
1856             wxMenu* menu = (wxMenu*) node->Data();
1857             menu->AppendSeparator();
1858             int i;
1859             for (i = 0; i < m_fileHistoryN; i++)
1860             {
1861                 if (m_fileHistory[i])
1862                 {
1863                     wxString buf;
1864                     buf.Printf("&%d %s", i+1, m_fileHistory[i]);
1865                     menu->Append(wxID_FILE1+i, buf);
1866                 }
1867             }
1868             node = node->Next();
1869         }
1870     }
1871 }
1872
1873 void wxFileHistory::AddFilesToMenu(wxMenu* menu)
1874 {
1875     if (m_fileHistoryN > 0)
1876     {
1877         menu->AppendSeparator();
1878         int i;
1879         for (i = 0; i < m_fileHistoryN; i++)
1880         {
1881             if (m_fileHistory[i])
1882             {
1883                 wxString buf;
1884                 buf.Printf("&%d %s", i+1, m_fileHistory[i]);
1885                 menu->Append(wxID_FILE1+i, buf);
1886             }
1887         }
1888     }
1889 }
1890
1891 #if 0
1892 /*
1893  * wxPrintInfo
1894  */
1895
1896 wxPrintInfo::wxPrintInfo(void)
1897 {
1898   pageNumber = 1;
1899 }
1900
1901 wxPrintInfo::~wxPrintInfo(void)
1902 {
1903 }
1904 #endif
1905
1906 /*
1907  * Permits compatibility with existing file formats and functions
1908  * that manipulate files directly
1909  */
1910
1911 bool wxTransferFileToStream(const wxString& filename, ostream& stream)
1912 {
1913   FILE *fd1;
1914   int ch;
1915
1916   if ((fd1 = fopen (WXSTRINGCAST filename, "rb")) == NULL)
1917     return FALSE;
1918
1919   while ((ch = getc (fd1)) != EOF)
1920     stream << (unsigned char)ch;
1921
1922   fclose (fd1);
1923   return TRUE;
1924 }
1925
1926 bool wxTransferStreamToFile(istream& stream, const wxString& filename)
1927 {
1928   FILE *fd1;
1929   int ch;
1930
1931   if ((fd1 = fopen (WXSTRINGCAST filename, "wb")) == NULL)
1932     {
1933       return FALSE;
1934     }
1935
1936   while (!stream.eof())
1937   {
1938     ch = stream.get();
1939     if (!stream.eof())
1940       putc (ch, fd1);
1941   }
1942   fclose (fd1);
1943   return TRUE;
1944 }
1945
1946 #endif
1947   // End wxUSE_DOC_VIEW_ARCHITECTURE