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 void wxDocManager::FileHistoryLoad(wxConfigBase& config)
1048 {
1049   if (m_fileHistory)
1050     m_fileHistory->Load(config);
1051 }
1052
1053 void wxDocManager::FileHistorySave(wxConfigBase& config)
1054 {
1055   if (m_fileHistory)
1056     m_fileHistory->Save(config);
1057 }
1058
1059 void wxDocManager::FileHistoryAddFilesToMenu(wxMenu* menu)
1060 {
1061   if (m_fileHistory)
1062     m_fileHistory->AddFilesToMenu(menu);
1063 }
1064
1065 void wxDocManager::FileHistoryAddFilesToMenu()
1066 {
1067   if (m_fileHistory)
1068     m_fileHistory->AddFilesToMenu();
1069 }
1070
1071 int wxDocManager::GetNoHistoryFiles(void) const
1072 {
1073   if (m_fileHistory)
1074     return m_fileHistory->GetNoHistoryFiles();
1075   else
1076     return 0;
1077 }
1078
1079 static char *FindExtension(char *path)
1080 {
1081   static char ext[10];
1082   int len = strlen(path);
1083   if (path)
1084   {
1085     int i = 0;
1086     for (i = (len-1); i > 0; i --)
1087       if (path[i] == '.')
1088         break;
1089     if (path[i] == '.')
1090     {
1091       int j;
1092       for (j = i+1; j < len; j++)
1093         ext[(int)(j-(i+1))] = (char)wxToLower(path[j]); // NOTE Should not use tolower under UNIX
1094       ext[j-(i+1)] = 0;
1095       return ext;
1096     }
1097     else
1098       return (char *) NULL;
1099   }
1100   else return (char *) NULL;
1101 }
1102
1103
1104 // Given a path, try to find a matching template. Won't
1105 // always work, of course.
1106 wxDocTemplate *wxDocManager::FindTemplateForPath(const wxString& path)
1107 {
1108   char *theExt = FindExtension((char *)(const char *)path);
1109   if (!theExt)
1110     return (wxDocTemplate *) NULL;
1111   wxDocTemplate *theTemplate = (wxDocTemplate *) NULL;
1112
1113   if (m_templates.Number() == 1)
1114     return (wxDocTemplate *)m_templates.First()->Data();
1115
1116   // Find the template which this extension corresponds to
1117   int i;
1118   for (i = 0; i < m_templates.Number(); i++)
1119   {
1120     wxDocTemplate *temp = (wxDocTemplate *)m_templates.Nth(i)->Data();
1121     if (strcmp(temp->GetDefaultExtension(), theExt) == 0)
1122     {
1123       theTemplate = temp;
1124       break;
1125     }
1126   }
1127   return theTemplate;
1128 }
1129
1130 // Prompts user to open a file, using file specs in templates.
1131 // How to implement in wxWindows? Must extend the file selector
1132 // dialog or implement own; OR match the extension to the
1133 // template extension.
1134
1135 #ifdef __WXMSW__
1136 wxDocTemplate *wxDocManager::SelectDocumentPath(wxDocTemplate **templates,
1137     int noTemplates, wxString& path, long WXUNUSED(flags), bool WXUNUSED(save))
1138 #else
1139 wxDocTemplate *wxDocManager::SelectDocumentPath(wxDocTemplate **WXUNUSED(templates),
1140     int WXUNUSED(noTemplates), wxString& path, long WXUNUSED(flags), bool WXUNUSED(save))
1141 #endif
1142 {
1143   // We can only have multiple filters in Windows
1144 #ifdef __WXMSW__
1145   char *descrBuf = new char[1000];  // FIXME static buffer
1146   descrBuf[0] = 0;
1147   int i;
1148   for (i = 0; i < noTemplates; i++)
1149   {
1150     if (templates[i]->IsVisible())
1151     {
1152       strcat(descrBuf, templates[i]->GetDescription());
1153       strcat(descrBuf, " (");
1154       strcat(descrBuf, templates[i]->GetFileFilter());
1155       strcat(descrBuf, ") ");
1156       strcat(descrBuf, "|");
1157       strcat(descrBuf, templates[i]->GetFileFilter());
1158       strcat(descrBuf, "|");
1159     }
1160   }
1161   int len = strlen(descrBuf);
1162   if (len > 0)
1163     // Omit final "|"
1164     descrBuf[len-1] = 0;
1165 #else
1166   char* descrBuf = copystring("*.*");
1167 #endif
1168
1169   char *pathTmp = wxFileSelector(_("Select a file"), "", "", "", descrBuf, 0, wxTheApp->GetTopWindow());
1170   delete[] descrBuf;
1171   if (pathTmp)
1172   {
1173     path = pathTmp;
1174     char *theExt = FindExtension((char *)(const char *)path);
1175     if (!theExt)
1176       return (wxDocTemplate *) NULL;
1177
1178     // This is dodgy in that we're selecting the template on the
1179     // basis of the file extension, which may not be a standard
1180     // one. We really want to know exactly which template was
1181     // chosen by using a more advanced file selector.
1182     wxDocTemplate *theTemplate = FindTemplateForPath(path);
1183     return theTemplate;
1184   }
1185   else
1186   {
1187     path = "";
1188     return (wxDocTemplate *) NULL;
1189   }
1190 #if 0
1191   // In all other windowing systems, until we have more advanced
1192   // file selectors, we must select the document type (template) first, and
1193   // _then_ pop up the file selector.
1194   wxDocTemplate *temp = SelectDocumentType(templates, noTemplates);
1195   if (!temp)
1196     return (wxDocTemplate *) NULL;
1197
1198   char *pathTmp = wxFileSelector(_("Select a file"), "", "",
1199      temp->GetDefaultExtension(),
1200      temp->GetFileFilter(),
1201      0, wxTheApp->GetTopWindow());
1202
1203   if (pathTmp)
1204   {
1205     path = pathTmp;
1206     return temp;
1207   }
1208   else
1209     return (wxDocTemplate *) NULL;
1210 #endif
1211 }
1212
1213 wxDocTemplate *wxDocManager::SelectDocumentType(wxDocTemplate **templates,
1214     int noTemplates)
1215 {
1216   char **strings = new char *[noTemplates];
1217   char **data = new char *[noTemplates];
1218   int i;
1219   int n = 0;
1220   for (i = 0; i < noTemplates; i++)
1221   {
1222     if (templates[i]->IsVisible())
1223     {
1224       strings[n] = WXSTRINGCAST templates[i]->m_description;
1225       data[n] = (char *)templates[i];
1226       n ++;
1227     }
1228   }
1229   if (n == 0)
1230   {
1231     delete[] strings;
1232     delete[] data;
1233     return (wxDocTemplate *) NULL;
1234   }
1235   else if (n == 1)
1236   {
1237     wxDocTemplate *temp = (wxDocTemplate *)data[0];
1238     delete[] strings;
1239     delete[] data;
1240     return temp;
1241   }
1242
1243   wxDocTemplate *theTemplate = (wxDocTemplate *)wxGetSingleChoiceData(_("Select a document template"), _("Templates"), n,
1244     strings, data);
1245   delete[] strings;
1246   delete[] data;
1247   return theTemplate;
1248 }
1249
1250 wxDocTemplate *wxDocManager::SelectViewType(wxDocTemplate **templates,
1251     int noTemplates)
1252 {
1253   char **strings = new char *[noTemplates];
1254   char **data = new char *[noTemplates];
1255   int i;
1256   int n = 0;
1257   for (i = 0; i < noTemplates; i++)
1258   {
1259     if (templates[i]->IsVisible() && templates[i]->GetViewName())
1260     {
1261       strings[n] = WXSTRINGCAST templates[i]->m_viewTypeName;
1262       data[n] = (char *)templates[i];
1263       n ++;
1264     }
1265   }
1266   wxDocTemplate *theTemplate = (wxDocTemplate *)wxGetSingleChoiceData(_("Select a document view"), _("Views"), n,
1267     strings, data);
1268   delete[] strings;
1269   delete[] data;
1270   return theTemplate;
1271 }
1272
1273 void wxDocManager::AssociateTemplate(wxDocTemplate *temp)
1274 {
1275   if (!m_templates.Member(temp))
1276     m_templates.Append(temp);
1277 }
1278
1279 void wxDocManager::DisassociateTemplate(wxDocTemplate *temp)
1280 {
1281   m_templates.DeleteObject(temp);
1282 }
1283
1284 // Add and remove a document from the manager's list
1285 void wxDocManager::AddDocument(wxDocument *doc)
1286 {
1287   if (!m_docs.Member(doc))
1288     m_docs.Append(doc);
1289 }
1290
1291 void wxDocManager::RemoveDocument(wxDocument *doc)
1292 {
1293   m_docs.DeleteObject(doc);
1294 }
1295
1296 // Views or windows should inform the document manager
1297 // when a view is going in or out of focus
1298 void wxDocManager::ActivateView(wxView *view, bool activate, bool WXUNUSED(deleting))
1299 {
1300   // If we're deactiving, and if we're not actually deleting the view, then
1301   // don't reset the current view because we may be going to
1302   // a window without a view.
1303   // WHAT DID I MEAN BY THAT EXACTLY?
1304 /*
1305   if (deleting)
1306   {
1307     if (m_currentView == view)
1308       m_currentView = NULL;
1309   }
1310   else
1311 */
1312   {
1313     if (activate)
1314       m_currentView = view;
1315     else
1316       m_currentView = (wxView *) NULL;
1317   }
1318 }
1319
1320 /*
1321  * Default document child frame
1322  */
1323
1324 BEGIN_EVENT_TABLE(wxDocChildFrame, wxFrame)
1325     EVT_ACTIVATE(wxDocChildFrame::OnActivate)
1326     EVT_CLOSE(wxDocChildFrame::OnCloseWindow)
1327 END_EVENT_TABLE()
1328
1329 wxDocChildFrame::wxDocChildFrame(wxDocument *doc, wxView *view, wxFrame *frame, wxWindowID id, const wxString& title,
1330   const wxPoint& pos, const wxSize& size, long style, const wxString& name):
1331     wxFrame(frame, id, title, pos, size, style, name)
1332 {
1333   m_childDocument = doc;
1334   m_childView = view;
1335   if (view)
1336     view->SetFrame(this);
1337 }
1338
1339 wxDocChildFrame::~wxDocChildFrame(void)
1340 {
1341 }
1342
1343 // Extend event processing to search the view's event table
1344 bool wxDocChildFrame::ProcessEvent(wxEvent& event)
1345 {
1346     if (m_childView)
1347         m_childView->Activate(TRUE);
1348
1349         if ( !m_childView || ! m_childView->ProcessEvent(event) )
1350     {
1351         // Only hand up to the parent if it's a menu command
1352         if (!event.IsKindOf(CLASSINFO(wxCommandEvent)) || !GetParent() || !GetParent()->ProcessEvent(event))
1353                     return wxEvtHandler::ProcessEvent(event);
1354         else
1355             return TRUE;
1356     }
1357         else
1358                 return TRUE;
1359 }
1360
1361 void wxDocChildFrame::OnActivate(wxActivateEvent& event)
1362 {
1363   wxFrame::OnActivate(event);
1364
1365   if (m_childView)
1366     m_childView->Activate(event.GetActive());
1367 }
1368
1369 void wxDocChildFrame::OnCloseWindow(wxCloseEvent& event)
1370 {
1371   if (m_childView)
1372   {
1373     bool ans = FALSE;
1374     if (!event.CanVeto())
1375       ans = TRUE; // Must delete.
1376     else
1377       ans = m_childView->Close(FALSE); // FALSE means don't delete associated window
1378
1379     if (ans)
1380     {
1381       m_childView->Activate(FALSE);
1382       delete m_childView;
1383       m_childView = (wxView *) NULL;
1384       m_childDocument = (wxDocument *) NULL;
1385
1386       this->Destroy();
1387     }
1388     else
1389       event.Veto();
1390   }
1391   else
1392     event.Veto();
1393 }
1394
1395 /*
1396  * Default parent frame
1397  */
1398
1399 BEGIN_EVENT_TABLE(wxDocParentFrame, wxFrame)
1400     EVT_MENU(wxID_EXIT, wxDocParentFrame::OnExit)
1401     EVT_MENU_RANGE(wxID_FILE1, wxID_FILE9, wxDocParentFrame::OnMRUFile)
1402     EVT_CLOSE(wxDocParentFrame::OnCloseWindow)
1403 END_EVENT_TABLE()
1404
1405 wxDocParentFrame::wxDocParentFrame(wxDocManager *manager, wxFrame *frame, wxWindowID id, const wxString& title,
1406   const wxPoint& pos, const wxSize& size, long style, const wxString& name):
1407   wxFrame(frame, id, title, pos, size, style, name)
1408 {
1409   m_docManager = manager;
1410 }
1411
1412 void wxDocParentFrame::OnExit(wxCommandEvent& WXUNUSED(event))
1413 {
1414     Close();
1415 }
1416
1417 void wxDocParentFrame::OnMRUFile(wxCommandEvent& event)
1418 {
1419       wxString f(m_docManager->GetHistoryFile(event.GetSelection() - wxID_FILE1));
1420       if (f != "")
1421         (void)m_docManager->CreateDocument(f, wxDOC_SILENT);
1422 }
1423
1424 // Extend event processing to search the view's event table
1425 bool wxDocParentFrame::ProcessEvent(wxEvent& event)
1426 {
1427     // Try the document manager, then do default processing
1428     if (!m_docManager || !m_docManager->ProcessEvent(event))
1429         return wxEvtHandler::ProcessEvent(event);
1430     else
1431         return TRUE;
1432 }
1433
1434 // Define the behaviour for the frame closing
1435 // - must delete all frames except for the main one.
1436 void wxDocParentFrame::OnCloseWindow(wxCloseEvent& event)
1437 {
1438   if (m_docManager->Clear(!event.CanVeto()))
1439   {
1440     this->Destroy();
1441   }
1442   else
1443     event.Veto();
1444 }
1445
1446 #if wxUSE_PRINTING_ARCHITECTURE
1447
1448 wxDocPrintout::wxDocPrintout(wxView *view, const wxString& title):
1449   wxPrintout(WXSTRINGCAST title)
1450 {
1451   m_printoutView = view;
1452 }
1453
1454 bool wxDocPrintout::OnPrintPage(int WXUNUSED(page))
1455 {
1456   wxDC *dc = GetDC();
1457
1458   // Get the logical pixels per inch of screen and printer
1459   int ppiScreenX, ppiScreenY;
1460   GetPPIScreen(&ppiScreenX, &ppiScreenY);
1461   int ppiPrinterX, ppiPrinterY;
1462   GetPPIPrinter(&ppiPrinterX, &ppiPrinterY);
1463
1464   // This scales the DC so that the printout roughly represents the
1465   // the screen scaling. The text point size _should_ be the right size
1466   // but in fact is too small for some reason. This is a detail that will
1467   // need to be addressed at some point but can be fudged for the
1468   // moment.
1469   float scale = (float)((float)ppiPrinterX/(float)ppiScreenX);
1470
1471   // Now we have to check in case our real page size is reduced
1472   // (e.g. because we're drawing to a print preview memory DC)
1473   int pageWidth, pageHeight;
1474   int w, h;
1475   dc->GetSize(&w, &h);
1476   GetPageSizePixels(&pageWidth, &pageHeight);
1477
1478   // If printer pageWidth == current DC width, then this doesn't
1479   // change. But w might be the preview bitmap width, so scale down.
1480   float overallScale = scale * (float)(w/(float)pageWidth);
1481   dc->SetUserScale(overallScale, overallScale);
1482
1483   if (m_printoutView)
1484   {
1485     m_printoutView->OnDraw(dc);
1486   }
1487   return TRUE;
1488 }
1489
1490 bool wxDocPrintout::HasPage(int pageNum)
1491 {
1492   return (pageNum == 1);
1493 }
1494
1495 bool wxDocPrintout::OnBeginDocument(int startPage, int endPage)
1496 {
1497   if (!wxPrintout::OnBeginDocument(startPage, endPage))
1498     return FALSE;
1499
1500   return TRUE;
1501 }
1502
1503 void wxDocPrintout::GetPageInfo(int *minPage, int *maxPage, int *selPageFrom, int *selPageTo)
1504 {
1505   *minPage = 1;
1506   *maxPage = 1;
1507   *selPageFrom = 1;
1508   *selPageTo = 1;
1509 }
1510
1511 #endif
1512
1513 /*
1514  * Command processing framework
1515  */
1516
1517 wxCommand::wxCommand(bool canUndoIt, const wxString& name)
1518 {
1519   m_canUndo = canUndoIt;
1520   m_commandName = name;
1521 }
1522
1523 wxCommand::~wxCommand(void)
1524 {
1525 }
1526
1527 // Command processor
1528 wxCommandProcessor::wxCommandProcessor(int maxCommands)
1529 {
1530   m_maxNoCommands = maxCommands;
1531   m_currentCommand = (wxNode *) NULL;
1532   m_commandEditMenu = (wxMenu *) NULL;
1533 }
1534
1535 wxCommandProcessor::~wxCommandProcessor(void)
1536 {
1537   ClearCommands();
1538 }
1539
1540 // Pass a command to the processor. The processor calls Do();
1541 // if successful, is appended to the command history unless
1542 // storeIt is FALSE.
1543 bool wxCommandProcessor::Submit(wxCommand *command, bool storeIt)
1544 {
1545   bool success = command->Do();
1546   if (success && storeIt)
1547   {
1548     if (m_commands.Number() == m_maxNoCommands)
1549     {
1550       wxNode *firstNode = m_commands.First();
1551       wxCommand *firstCommand = (wxCommand *)firstNode->Data();
1552       delete firstCommand;
1553       delete firstNode;
1554     }
1555
1556     // Correct a bug: we must chop off the current 'branch'
1557     // so that we're at the end of the command list.
1558     if (!m_currentCommand)
1559       ClearCommands();
1560     else
1561     {
1562       wxNode *node = m_currentCommand->Next();
1563       while (node)
1564       {
1565         wxNode *next = node->Next();
1566         delete (wxCommand *)node->Data();
1567         delete node;
1568         node = next;
1569       }
1570     }
1571
1572     m_commands.Append(command);
1573     m_currentCommand = m_commands.Last();
1574     SetMenuStrings();
1575   }
1576   return success;
1577 }
1578
1579 bool wxCommandProcessor::Undo(void)
1580 {
1581   if (m_currentCommand)
1582   {
1583     wxCommand *command = (wxCommand *)m_currentCommand->Data();
1584     if (command->CanUndo())
1585     {
1586       bool success = command->Undo();
1587       if (success)
1588       {
1589         m_currentCommand = m_currentCommand->Previous();
1590         SetMenuStrings();
1591         return TRUE;
1592       }
1593     }
1594   }
1595   return FALSE;
1596 }
1597
1598 bool wxCommandProcessor::Redo(void)
1599 {
1600   wxCommand *redoCommand = (wxCommand *) NULL;
1601   wxNode *redoNode = (wxNode *) NULL;
1602   if (m_currentCommand && m_currentCommand->Next())
1603   {
1604     redoCommand = (wxCommand *)m_currentCommand->Next()->Data();
1605     redoNode = m_currentCommand->Next();
1606   }
1607   else
1608   {
1609     if (m_commands.Number() > 0)
1610     {
1611       redoCommand = (wxCommand *)m_commands.First()->Data();
1612       redoNode = m_commands.First();
1613     }
1614   }
1615
1616   if (redoCommand)
1617   {
1618     bool success = redoCommand->Do();
1619     if (success)
1620     {
1621       m_currentCommand = redoNode;
1622       SetMenuStrings();
1623       return TRUE;
1624     }
1625   }
1626   return FALSE;
1627 }
1628
1629 bool wxCommandProcessor::CanUndo(void) const
1630 {
1631   if (m_currentCommand)
1632     return ((wxCommand *)m_currentCommand->Data())->CanUndo();
1633   return FALSE;
1634 }
1635
1636 bool wxCommandProcessor::CanRedo(void) const
1637 {
1638     if ((m_currentCommand != (wxNode*) NULL) && (m_currentCommand->Next() == (wxNode*) NULL))
1639         return FALSE;
1640
1641     if ((m_currentCommand != (wxNode*) NULL) && (m_currentCommand->Next() != (wxNode*) NULL))
1642         return TRUE;
1643
1644     if ((m_currentCommand == (wxNode*) NULL) && (m_commands.Number() > 0))
1645         return TRUE;
1646
1647     return FALSE;
1648 }
1649
1650 void wxCommandProcessor::Initialize(void)
1651 {
1652   m_currentCommand = m_commands.Last();
1653   SetMenuStrings();
1654 }
1655
1656 void wxCommandProcessor::SetMenuStrings(void)
1657 {
1658   if (m_commandEditMenu)
1659   {
1660     wxString buf;
1661     if (m_currentCommand)
1662     {
1663       wxCommand *command = (wxCommand *)m_currentCommand->Data();
1664       wxString commandName(command->GetName());
1665       if (commandName == "") commandName = _("Unnamed command");
1666       bool canUndo = command->CanUndo();
1667       if (canUndo)
1668         buf = wxString(_("&Undo ")) + commandName;
1669       else
1670         buf = wxString(_("Can't &Undo ")) + commandName;
1671
1672       m_commandEditMenu->SetLabel(wxID_UNDO, buf);
1673       m_commandEditMenu->Enable(wxID_UNDO, canUndo);
1674
1675       // We can redo, if we're not at the end of the history.
1676       if (m_currentCommand->Next())
1677       {
1678         wxCommand *redoCommand = (wxCommand *)m_currentCommand->Next()->Data();
1679         wxString redoCommandName(redoCommand->GetName());
1680         if (redoCommandName == "") redoCommandName = _("Unnamed command");
1681         buf = wxString(_("&Redo ")) + redoCommandName;
1682         m_commandEditMenu->SetLabel(wxID_REDO, buf);
1683         m_commandEditMenu->Enable(wxID_REDO, TRUE);
1684       }
1685       else
1686       {
1687         m_commandEditMenu->SetLabel(wxID_REDO, _("&Redo"));
1688         m_commandEditMenu->Enable(wxID_REDO, FALSE);
1689       }
1690     }
1691     else
1692     {
1693       m_commandEditMenu->SetLabel(wxID_UNDO, _("&Undo"));
1694       m_commandEditMenu->Enable(wxID_UNDO, FALSE);
1695
1696       if (m_commands.Number() == 0)
1697       {
1698         m_commandEditMenu->SetLabel(wxID_REDO, _("&Redo"));
1699         m_commandEditMenu->Enable(wxID_REDO, FALSE);
1700       }
1701       else
1702       {
1703         // currentCommand is NULL but there are commands: this means that
1704         // we've undone to the start of the list, but can redo the first.
1705         wxCommand *redoCommand = (wxCommand *)m_commands.First()->Data();
1706         wxString redoCommandName(redoCommand->GetName());
1707         if (!redoCommandName) redoCommandName = _("Unnamed command");
1708         buf = wxString(_("&Redo ")) + redoCommandName;
1709         m_commandEditMenu->SetLabel(wxID_REDO, buf);
1710         m_commandEditMenu->Enable(wxID_REDO, TRUE);
1711       }
1712     }
1713   }
1714 }
1715
1716 void wxCommandProcessor::ClearCommands(void)
1717 {
1718   wxNode *node = m_commands.First();
1719   while (node)
1720   {
1721     wxCommand *command = (wxCommand *)node->Data();
1722     delete command;
1723     delete node;
1724     node = m_commands.First();
1725   }
1726   m_currentCommand = (wxNode *) NULL;
1727 }
1728
1729
1730 /*
1731  * File history processor
1732  */
1733
1734 wxFileHistory::wxFileHistory(int maxFiles)
1735 {
1736   m_fileMaxFiles = maxFiles;
1737   m_fileHistoryN = 0;
1738   m_fileHistory = new char *[m_fileMaxFiles];
1739 }
1740
1741 wxFileHistory::~wxFileHistory(void)
1742 {
1743   int i;
1744   for (i = 0; i < m_fileHistoryN; i++)
1745     delete[] m_fileHistory[i];
1746   delete[] m_fileHistory;
1747 }
1748
1749 // File history management
1750 void wxFileHistory::AddFileToHistory(const wxString& file)
1751 {
1752   int i;
1753   // Check we don't already have this file
1754   for (i = 0; i < m_fileHistoryN; i++)
1755   {
1756       if (m_fileHistory[i] && wxString(m_fileHistory[i]) == file)
1757           return;
1758   }
1759
1760   // Add to the project file history:
1761   // Move existing files (if any) down so we can insert file at beginning.
1762
1763   // First delete filename that has popped off the end of the array (if any)
1764   if (m_fileHistoryN == m_fileMaxFiles)
1765   {
1766     delete[] m_fileHistory[m_fileMaxFiles-1];
1767     m_fileHistory[m_fileMaxFiles-1] = (char *) NULL;
1768   }
1769   if (m_fileHistoryN < m_fileMaxFiles)
1770   {
1771     wxNode* node = m_fileMenus.First();
1772     while (node)
1773     {
1774         wxMenu* menu = (wxMenu*) node->Data();
1775         if (m_fileHistoryN == 0)
1776             menu->AppendSeparator();
1777         menu->Append(wxID_FILE1+m_fileHistoryN, _("[EMPTY]"));
1778         node = node->Next();
1779     }
1780     m_fileHistoryN ++;
1781   }
1782   // Shuffle filenames down
1783   for (i = (m_fileHistoryN-1); i > 0; i--)
1784   {
1785     m_fileHistory[i] = m_fileHistory[i-1];
1786   }
1787   m_fileHistory[0] = copystring(file);
1788
1789   for (i = 0; i < m_fileHistoryN; i++)
1790     if (m_fileHistory[i])
1791     {
1792       wxString buf;
1793       buf.Printf("&%d %s", i+1, m_fileHistory[i]);
1794       wxNode* node = m_fileMenus.First();
1795       while (node)
1796       {
1797         wxMenu* menu = (wxMenu*) node->Data();
1798         menu->SetLabel(wxID_FILE1+i, buf);
1799         node = node->Next();
1800       }
1801     }
1802 }
1803
1804 wxString wxFileHistory::GetHistoryFile(int i) const
1805 {
1806   if (i < m_fileHistoryN)
1807     return wxString(m_fileHistory[i]);
1808   else
1809     return wxString("");
1810 }
1811
1812 void wxFileHistory::UseMenu(wxMenu *menu)
1813 {
1814   if (!m_fileMenus.Member(menu))
1815     m_fileMenus.Append(menu);
1816 }
1817
1818 void wxFileHistory::RemoveMenu(wxMenu *menu)
1819 {
1820   m_fileMenus.DeleteObject(menu);
1821 }
1822
1823 void wxFileHistory::Load(wxConfigBase& config)
1824 {
1825   m_fileHistoryN = 0;
1826   wxString buf;
1827   buf.Printf("file%d", m_fileHistoryN+1);
1828   wxString historyFile;
1829   while ((m_fileHistoryN <= m_fileMaxFiles) && config.Read(buf, &historyFile) && (historyFile != ""))
1830   {
1831     m_fileHistory[m_fileHistoryN] = copystring((const char*) historyFile);
1832     m_fileHistoryN ++;
1833     buf.Printf("file%d", m_fileHistoryN+1);
1834     historyFile = "";
1835   }
1836   AddFilesToMenu();
1837 }
1838
1839 void wxFileHistory::Save(wxConfigBase& config)
1840 {
1841   int i;
1842   for (i = 0; i < m_fileHistoryN; i++)
1843   {
1844     wxString buf;
1845     buf.Printf("file%d", i+1);
1846     config.Write(buf, wxString(m_fileHistory[i]));
1847   }
1848 }
1849
1850 void wxFileHistory::AddFilesToMenu()
1851 {
1852     if (m_fileHistoryN > 0)
1853     {
1854         wxNode* node = m_fileMenus.First();
1855         while (node)
1856         {
1857             wxMenu* menu = (wxMenu*) node->Data();
1858             menu->AppendSeparator();
1859             int i;
1860             for (i = 0; i < m_fileHistoryN; i++)
1861             {
1862                 if (m_fileHistory[i])
1863                 {
1864                     wxString buf;
1865                     buf.Printf("&%d %s", i+1, m_fileHistory[i]);
1866                     menu->Append(wxID_FILE1+i, buf);
1867                 }
1868             }
1869             node = node->Next();
1870         }
1871     }
1872 }
1873
1874 void wxFileHistory::AddFilesToMenu(wxMenu* menu)
1875 {
1876     if (m_fileHistoryN > 0)
1877     {
1878         menu->AppendSeparator();
1879         int i;
1880         for (i = 0; i < m_fileHistoryN; i++)
1881         {
1882             if (m_fileHistory[i])
1883             {
1884                 wxString buf;
1885                 buf.Printf("&%d %s", i+1, m_fileHistory[i]);
1886                 menu->Append(wxID_FILE1+i, buf);
1887             }
1888         }
1889     }
1890 }
1891
1892 #if 0
1893 /*
1894  * wxPrintInfo
1895  */
1896
1897 wxPrintInfo::wxPrintInfo(void)
1898 {
1899   pageNumber = 1;
1900 }
1901
1902 wxPrintInfo::~wxPrintInfo(void)
1903 {
1904 }
1905 #endif
1906
1907 /*
1908  * Permits compatibility with existing file formats and functions
1909  * that manipulate files directly
1910  */
1911
1912 bool wxTransferFileToStream(const wxString& filename, ostream& stream)
1913 {
1914   FILE *fd1;
1915   int ch;
1916
1917   if ((fd1 = fopen (WXSTRINGCAST filename, "rb")) == NULL)
1918     return FALSE;
1919
1920   while ((ch = getc (fd1)) != EOF)
1921     stream << (unsigned char)ch;
1922
1923   fclose (fd1);
1924   return TRUE;
1925 }
1926
1927 bool wxTransferStreamToFile(istream& stream, const wxString& filename)
1928 {
1929   FILE *fd1;
1930   int ch;
1931
1932   if ((fd1 = fopen (WXSTRINGCAST filename, "wb")) == NULL)
1933     {
1934       return FALSE;
1935     }
1936
1937   while (!stream.eof())
1938   {
1939     ch = stream.get();
1940     if (!stream.eof())
1941       putc (ch, fd1);
1942   }
1943   fclose (fd1);
1944   return TRUE;
1945 }
1946
1947 #endif
1948   // End wxUSE_DOC_VIEW_ARCHITECTURE