src/motif/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        textctrl.cpp
   3 // Purpose:     wxTextCtrl
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "textctrl.h"
  22 #endif
  23
  24 #ifdef __VMS
  25 #define XtParent XTPARENT
  26 #endif
  27
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <fstream.h>
  31 #include <ctype.h>
  32
  33 #include "wx/textctrl.h"
  34 #include "wx/settings.h"
  35 #include "wx/filefn.h"
  36 #include "wx/utils.h"
  37
  38 #ifdef __VMS__
  39 #pragma message disable nosimpint
  40 #endif
  41 #include <Xm/Text.h>
  42 #ifdef __VMS__
  43 #pragma message enable nosimpint
  44 #endif
  45
  46 #include "wx/motif/private.h"
  47
  48 // ----------------------------------------------------------------------------
  49 // private functions
  50 // ----------------------------------------------------------------------------
  51
  52 // helper: inserts the new text in the value of the text ctrl and returns the
  53 // result in place
  54 static void MergeChangesIntoString(wxString& value,
  55                                    XmTextVerifyCallbackStruct *textStruct);
  56
  57 // callbacks
  58 static void wxTextWindowChangedProc(Widget w, XtPointer clientData, XtPointer ptr);
  59 static void wxTextWindowModifyProc(Widget w, XtPointer clientData, XmTextVerifyCallbackStruct *cbs);
  60 static void wxTextWindowGainFocusProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs);
  61 static void wxTextWindowLoseFocusProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs);
  62 static void wxTextWindowActivateProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *ptr);
  63
  64     IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  65
  66     BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  67         EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  68         EVT_CHAR(wxTextCtrl::OnChar)
  69
  70     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
  71     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
  72     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
  73     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
  74     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
  75
  76     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
  77     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
  78     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
  79     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
  80     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
  81
  82     END_EVENT_TABLE()
  83
  84 // ============================================================================
  85 // implementation
  86 // ============================================================================
  87
  88 // ----------------------------------------------------------------------------
  89 // wxTextCtrl
  90 // ----------------------------------------------------------------------------
  91
  92 // Text item
  93 wxTextCtrl::wxTextCtrl()
  94 {
  95     m_tempCallbackStruct = (void*) NULL;
  96     m_modified = FALSE;
  97     m_processedDefault = FALSE;
  98 }
  99
 100 bool wxTextCtrl::Create(wxWindow *parent,
 101                         wxWindowID id,
 102                         const wxString& value,
 103                         const wxPoint& pos,
 104                         const wxSize& size,
 105                         long style,
 106                         const wxValidator& validator,
 107                         const wxString& name)
 108 {
 109     m_tempCallbackStruct = (void*) NULL;
 110     m_modified = FALSE;
 111     m_processedDefault = FALSE;
 112     //    m_backgroundColour = parent->GetBackgroundColour();
 113     m_backgroundColour = * wxWHITE;
 114     m_foregroundColour = parent->GetForegroundColour();
 115
 116     SetName(name);
 117     SetValidator(validator);
 118     if (parent)
 119         parent->AddChild(this);
 120
 121     m_windowStyle = style;
 122
 123     if ( id == -1 )
 124         m_windowId = (int)NewControlId();
 125     else
 126         m_windowId = id;
 127
 128     Widget parentWidget = (Widget) parent->GetClientWidget();
 129
 130     bool wantHorizScrolling = ((m_windowStyle & wxHSCROLL) != 0);
 131
 132     // If we don't have horizontal scrollbars, we want word wrap.
 133     bool wantWordWrap = !wantHorizScrolling;
 134
 135     if (m_windowStyle & wxTE_MULTILINE)
 136     {
 137         Arg args[2];
 138         XtSetArg (args[0], XmNscrollHorizontal, wantHorizScrolling ? True : False);
 139         XtSetArg (args[1], XmNwordWrap, wantWordWrap ? True : False);
 140
 141         m_mainWidget = (WXWidget) XmCreateScrolledText(parentWidget,
 142                                                        (char*)name.c_str(),
 143                                                        args, 2);
 144
 145         XtVaSetValues ((Widget) m_mainWidget,
 146                         XmNeditable, ((style & wxTE_READONLY) ? False : True),
 147                         XmNeditMode, XmMULTI_LINE_EDIT,
 148                         NULL);
 149         XtManageChild ((Widget) m_mainWidget);
 150     }
 151     else
 152     {
 153         m_mainWidget = (WXWidget)XtVaCreateManagedWidget
 154                                  (
 155                                   (char*)name.c_str(),
 156                                   xmTextWidgetClass,
 157                                   parentWidget,
 158                                   NULL
 159                                  );
 160
 161         XtVaSetValues ((Widget) m_mainWidget,
 162                         XmNeditable, ((style & wxTE_READONLY) ? False : True),
 163                         NULL);
 164
 165         // TODO: Is this relevant? What does it do?
 166         int noCols = 2;
 167         if (!value.IsNull() && (value.Length() > (unsigned int) noCols))
 168             noCols = value.Length();
 169         XtVaSetValues((Widget) m_mainWidget,
 170                       XmNcolumns, noCols,
 171                       NULL);
 172     }
 173
 174     // remove border if asked for
 175     if ( style & wxNO_BORDER )
 176     {
 177         XtVaSetValues((Widget)m_mainWidget,
 178                       XmNshadowThickness, 0,
 179                       NULL);
 180     }
 181
 182     if ( !!value )
 183     {
 184 #if 0
 185         // don't do this because it is just linking the text to a source
 186         // string which is unsafe. MB
 187         //
 188         XmTextSetString ((Widget) m_mainWidget, (char*)value.c_str());
 189 #else
 190         // do this instead... MB
 191         //
 192         XtVaSetValues( (Widget) m_mainWidget,
 193                        XmNvalue, (char *)value.c_str(),
 194                        NULL);
 195 #endif
 196     }
 197
 198     // install callbacks
 199     XtAddCallback((Widget) m_mainWidget, XmNvalueChangedCallback, (XtCallbackProc)wxTextWindowChangedProc, (XtPointer)this);
 200
 201     XtAddCallback((Widget) m_mainWidget, XmNmodifyVerifyCallback, (XtCallbackProc)wxTextWindowModifyProc, (XtPointer)this);
 202
 203     XtAddCallback((Widget) m_mainWidget, XmNactivateCallback, (XtCallbackProc)wxTextWindowActivateProc, (XtPointer)this);
 204
 205     XtAddCallback((Widget) m_mainWidget, XmNfocusCallback, (XtCallbackProc)wxTextWindowGainFocusProc, (XtPointer)this);
 206
 207     XtAddCallback((Widget) m_mainWidget, XmNlosingFocusCallback, (XtCallbackProc)wxTextWindowLoseFocusProc, (XtPointer)this);
 208
 209     // font
 210     m_font = parent->GetFont();
 211     ChangeFont(FALSE);
 212
 213     SetCanAddEventHandler(TRUE);
 214     AttachWidget (parent, m_mainWidget, (WXWidget) NULL, pos.x, pos.y, size.x, size.y);
 215
 216     ChangeBackgroundColour();
 217
 218     return TRUE;
 219 }
 220
 221 WXWidget wxTextCtrl::GetTopWidget() const
 222 {
 223     return ((m_windowStyle & wxTE_MULTILINE) ? (WXWidget) XtParent((Widget) m_mainWidget) : m_mainWidget);
 224 }
 225
 226 wxString wxTextCtrl::GetValue() const
 227 {
 228     wxString str; // result
 229
 230     if (m_windowStyle & wxTE_PASSWORD)
 231     {
 232         // the value is stored always in m_value because it can't be retrieved
 233         // from the text control
 234         str = m_value;
 235     }
 236     else
 237     {
 238         // just get the string from Motif
 239         char *s = XmTextGetString ((Widget) m_mainWidget);
 240         if ( s )
 241         {
 242             str = s;
 243             XtFree (s);
 244         }
 245         //else: return empty string
 246
 247         if ( m_tempCallbackStruct )
 248         {
 249             // the string in the control isn't yet updated, can't use it as is
 250             MergeChangesIntoString(str, (XmTextVerifyCallbackStruct *)
 251                                    m_tempCallbackStruct);
 252         }
 253     }
 254
 255     return str;
 256 }
 257
 258 void wxTextCtrl::SetValue(const wxString& value)
 259 {
 260     m_inSetValue = TRUE;
 261
 262 #if 0
 263     // don't do this because it is just linking the text to a source
 264     // string which is unsafe. MB
 265     //
 266     XmTextSetString ((Widget) m_mainWidget, (char*)value.c_str());
 267 #else
 268     // do this instead... MB
 269     //
 270     XtVaSetValues( (Widget) m_mainWidget,
 271                    XmNvalue, (char *)value.c_str(),
 272                    NULL);
 273 #endif
 274
 275     m_inSetValue = FALSE;
 276 }
 277
 278 // Clipboard operations
 279 void wxTextCtrl::Copy()
 280 {
 281     XmTextCopy((Widget) m_mainWidget, CurrentTime);
 282 }
 283
 284 void wxTextCtrl::Cut()
 285 {
 286     XmTextCut((Widget) m_mainWidget, CurrentTime);
 287 }
 288
 289 void wxTextCtrl::Paste()
 290 {
 291     XmTextPaste((Widget) m_mainWidget);
 292 }
 293
 294 bool wxTextCtrl::CanCopy() const
 295 {
 296     // Can copy if there's a selection
 297     long from, to;
 298     GetSelection(& from, & to);
 299     return (from != to) ;
 300 }
 301
 302 bool wxTextCtrl::CanCut() const
 303 {
 304     // Can cut if there's a selection
 305     long from, to;
 306     GetSelection(& from, & to);
 307     return (from != to) && (IsEditable());
 308 }
 309
 310 bool wxTextCtrl::CanPaste() const
 311 {
 312     return IsEditable() ;
 313 }
 314
 315 // Undo/redo
 316 void wxTextCtrl::Undo()
 317 {
 318     // Not possible in Motif
 319 }
 320
 321 void wxTextCtrl::Redo()
 322 {
 323     // Not possible in Motif
 324 }
 325
 326 bool wxTextCtrl::CanUndo() const
 327 {
 328     // No Undo in Motif
 329     return FALSE;
 330 }
 331
 332 bool wxTextCtrl::CanRedo() const
 333 {
 334     // No Redo in Motif
 335     return FALSE;
 336 }
 337
 338 // If the return values from and to are the same, there is no
 339 // selection.
 340 void wxTextCtrl::GetSelection(long* from, long* to) const
 341 {
 342     XmTextPosition left, right;
 343
 344     XmTextGetSelectionPosition((Widget) m_mainWidget, & left, & right);
 345
 346     *from = (long) left;
 347     *to = (long) right;
 348 }
 349
 350 bool wxTextCtrl::IsEditable() const
 351 {
 352     return (XmTextGetEditable((Widget) m_mainWidget) != 0);
 353 }
 354
 355 void wxTextCtrl::SetEditable(bool editable)
 356 {
 357     XmTextSetEditable((Widget) m_mainWidget, (Boolean) editable);
 358 }
 359
 360 void wxTextCtrl::SetInsertionPoint(long pos)
 361 {
 362     XmTextSetInsertionPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 363 }
 364
 365 void wxTextCtrl::SetInsertionPointEnd()
 366 {
 367     long pos = GetLastPosition();
 368     SetInsertionPoint(pos);
 369 }
 370
 371 long wxTextCtrl::GetInsertionPoint() const
 372 {
 373     return (long) XmTextGetInsertionPosition ((Widget) m_mainWidget);
 374 }
 375
 376 long wxTextCtrl::GetLastPosition() const
 377 {
 378     return (long) XmTextGetLastPosition ((Widget) m_mainWidget);
 379 }
 380
 381 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 382 {
 383     XmTextReplace ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 384         (char*) (const char*) value);
 385 }
 386
 387 void wxTextCtrl::Remove(long from, long to)
 388 {
 389     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 390                       (Time) 0);
 391     XmTextRemove ((Widget) m_mainWidget);
 392 }
 393
 394 void wxTextCtrl::SetSelection(long from, long to)
 395 {
 396     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 397                       (Time) 0);
 398 }
 399
 400 bool wxTextCtrl::LoadFile(const wxString& file)
 401 {
 402     if (!wxFileExists(file))
 403         return FALSE;
 404
 405     m_fileName = file;
 406
 407     Clear();
 408
 409     Widget textWidget = (Widget) m_mainWidget;
 410     FILE *fp = 0;
 411
 412     struct stat statb;
 413     if ((stat ((char*) (const char*) file, &statb) == -1) || (statb.st_mode & S_IFMT) != S_IFREG ||
 414         !(fp = fopen ((char*) (const char*) file, "r")))
 415     {
 416         return FALSE;
 417     }
 418     else
 419     {
 420         long len = statb.st_size;
 421         char *text;
 422         if (!(text = XtMalloc ((unsigned) (len + 1))))
 423         {
 424             fclose (fp);
 425             return FALSE;
 426         }
 427         if (fread (text, sizeof (char), len, fp) != (size_t) len)
 428         {
 429         }
 430         fclose (fp);
 431
 432         text[len] = 0;
 433         XmTextSetString (textWidget, text);
 434         //      m_textPosition = len;
 435         XtFree (text);
 436         m_modified = FALSE;
 437         return TRUE;
 438     }
 439 }
 440
 441 // If file is null, try saved file name first
 442 // Returns TRUE if succeeds.
 443 bool wxTextCtrl::SaveFile(const wxString& file)
 444 {
 445     wxString theFile(file);
 446     if (theFile == "")
 447         theFile = m_fileName;
 448     if (theFile == "")
 449         return FALSE;
 450     m_fileName = theFile;
 451
 452     Widget textWidget = (Widget) m_mainWidget;
 453     FILE *fp;
 454
 455     if (!(fp = fopen ((char*) (const char*) theFile, "w")))
 456     {
 457         return FALSE;
 458     }
 459     else
 460     {
 461         char *text = XmTextGetString (textWidget);
 462         long len = XmTextGetLastPosition (textWidget);
 463
 464         if (fwrite (text, sizeof (char), len, fp) != (size_t) len)
 465         {
 466             // Did not write whole file
 467         }
 468         // Make sure newline terminates the file
 469         if (text[len - 1] != '\n')
 470             fputc ('\n', fp);
 471
 472         fclose (fp);
 473         XtFree (text);
 474         m_modified = FALSE;
 475         return TRUE;
 476     }
 477 }
 478
 479 void wxTextCtrl::WriteText(const wxString& text)
 480 {
 481     long textPosition = GetInsertionPoint() + strlen (text);
 482     XmTextInsert ((Widget) m_mainWidget, GetInsertionPoint(), (char*) (const char*) text);
 483     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 484     SetInsertionPoint(textPosition);
 485     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 486     m_modified = TRUE;
 487 }
 488
 489 void wxTextCtrl::AppendText(const wxString& text)
 490 {
 491     long textPosition = GetLastPosition() + strlen(text);
 492     XmTextInsert ((Widget) m_mainWidget, GetLastPosition(), (char*) (const char*) text);
 493     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 494     SetInsertionPoint(textPosition);
 495     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 496     m_modified = TRUE;
 497 }
 498
 499 void wxTextCtrl::Clear()
 500 {
 501     XmTextSetString ((Widget) m_mainWidget, "");
 502     m_modified = FALSE;
 503 }
 504
 505 bool wxTextCtrl::IsModified() const
 506 {
 507     return m_modified;
 508 }
 509
 510 // Makes 'unmodified'
 511 void wxTextCtrl::DiscardEdits()
 512 {
 513     m_modified = FALSE;
 514 }
 515
 516 int wxTextCtrl::GetNumberOfLines() const
 517 {
 518     // HIDEOUSLY inefficient, but we have no choice.
 519     char *s = XmTextGetString ((Widget) m_mainWidget);
 520     if (s)
 521     {
 522         long i = 0;
 523         int currentLine = 0;
 524         bool finished = FALSE;
 525         while (!finished)
 526         {
 527             int ch = s[i];
 528             if (ch == '\n')
 529             {
 530                 currentLine++;
 531                 i++;
 532             }
 533             else if (ch == 0)
 534             {
 535                 finished = TRUE;
 536             }
 537             else
 538                 i++;
 539         }
 540
 541         XtFree (s);
 542         return currentLine;
 543     }
 544     return 0;
 545 }
 546
 547 long wxTextCtrl::XYToPosition(long x, long y) const
 548 {
 549 /* It seems, that there is a bug in some versions of the Motif library,
 550     so the original wxWin-Code doesn't work. */
 551     /*
 552     Widget textWidget = (Widget) handle;
 553     return (long) XmTextXYToPos (textWidget, (Position) x, (Position) y);
 554     */
 555     /* Now a little workaround: */
 556     long r=0;
 557     for (int i=0; i<y; i++) r+=(GetLineLength(i)+1);
 558     return r+x;
 559 }
 560
 561 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 562 {
 563     Position xx, yy;
 564     XmTextPosToXY((Widget) m_mainWidget, pos, &xx, &yy);
 565     if ( x )
 566         *x = xx;
 567     if ( y )
 568         *y = yy;
 569
 570     return TRUE;
 571 }
 572
 573 void wxTextCtrl::ShowPosition(long pos)
 574 {
 575     XmTextShowPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 576 }
 577
 578 int wxTextCtrl::GetLineLength(long lineNo) const
 579 {
 580     wxString str = GetLineText (lineNo);
 581     return (int) str.Length();
 582 }
 583
 584 wxString wxTextCtrl::GetLineText(long lineNo) const
 585 {
 586     // HIDEOUSLY inefficient, but we have no choice.
 587     char *s = XmTextGetString ((Widget) m_mainWidget);
 588
 589     if (s)
 590     {
 591         wxString buf("");
 592         long i;
 593         int currentLine = 0;
 594         for (i = 0; currentLine != lineNo && s[i]; i++ )
 595             if (s[i] == '\n')
 596                 currentLine++;
 597             // Now get the text
 598             int j;
 599             for (j = 0; s[i] && s[i] != '\n'; i++, j++ )
 600                 buf += s[i];
 601
 602             XtFree(s);
 603             return buf;
 604     }
 605     else
 606         return wxEmptyString;
 607 }
 608
 609 /*
 610 * Text item
 611 */
 612
 613 void wxTextCtrl::Command(wxCommandEvent & event)
 614 {
 615     SetValue (event.GetString());
 616     ProcessCommand (event);
 617 }
 618
 619 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 620 {
 621     // By default, load the first file into the text window.
 622     if (event.GetNumberOfFiles() > 0)
 623     {
 624         LoadFile(event.GetFiles()[0]);
 625     }
 626 }
 627
 628 void wxTextCtrl::OnChar(wxKeyEvent& event)
 629 {
 630     // Indicates that we should generate a normal command, because
 631     // we're letting default behaviour happen (otherwise it's vetoed
 632     // by virtue of overriding OnChar)
 633     m_processedDefault = TRUE;
 634
 635     if (m_tempCallbackStruct)
 636     {
 637         XmTextVerifyCallbackStruct *textStruct =
 638             (XmTextVerifyCallbackStruct *) m_tempCallbackStruct;
 639         textStruct->doit = True;
 640         if (isascii(event.m_keyCode) && (textStruct->text->length == 1))
 641         {
 642             textStruct->text->ptr[0] = ((event.m_keyCode == WXK_RETURN) ? 10 : event.m_keyCode);
 643         }
 644     }
 645 }
 646
 647 void wxTextCtrl::ChangeFont(bool keepOriginalSize)
 648 {
 649     wxWindow::ChangeFont(keepOriginalSize);
 650 }
 651
 652 void wxTextCtrl::ChangeBackgroundColour()
 653 {
 654     wxWindow::ChangeBackgroundColour();
 655
 656     /* TODO: should scrollbars be affected? Should probably have separate
 657     * function to change them (by default, taken from wxSystemSettings)
 658     */
 659     if (m_windowStyle & wxTE_MULTILINE)
 660     {
 661         Widget parent = XtParent ((Widget) m_mainWidget);
 662         Widget hsb, vsb;
 663
 664         XtVaGetValues (parent,
 665             XmNhorizontalScrollBar, &hsb,
 666             XmNverticalScrollBar, &vsb,
 667             NULL);
 668         wxColour backgroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE);
 669         if (hsb)
 670             DoChangeBackgroundColour((WXWidget) hsb, backgroundColour, TRUE);
 671         if (vsb)
 672             DoChangeBackgroundColour((WXWidget) vsb, backgroundColour, TRUE);
 673
 674         DoChangeBackgroundColour((WXWidget) parent, m_backgroundColour, TRUE);
 675     }
 676 }
 677
 678 void wxTextCtrl::ChangeForegroundColour()
 679 {
 680     wxWindow::ChangeForegroundColour();
 681
 682     if (m_windowStyle & wxTE_MULTILINE)
 683     {
 684         Widget parent = XtParent ((Widget) m_mainWidget);
 685         Widget hsb, vsb;
 686
 687         XtVaGetValues (parent,
 688             XmNhorizontalScrollBar, &hsb,
 689             XmNverticalScrollBar, &vsb,
 690             NULL);
 691
 692             /* TODO: should scrollbars be affected? Should probably have separate
 693             * function to change them (by default, taken from wxSystemSettings)
 694             if (hsb)
 695             DoChangeForegroundColour((WXWidget) hsb, m_foregroundColour);
 696             if (vsb)
 697             DoChangeForegroundColour((WXWidget) vsb, m_foregroundColour);
 698         */
 699         DoChangeForegroundColour((WXWidget) parent, m_foregroundColour);
 700     }
 701 }
 702
 703 void wxTextCtrl::DoSendEvents(void *wxcbs, long keycode)
 704 {
 705     // we're in process of updating the text control
 706     m_tempCallbackStruct = wxcbs;
 707
 708     XmTextVerifyCallbackStruct *cbs = (XmTextVerifyCallbackStruct *)wxcbs;
 709
 710     wxKeyEvent event (wxEVT_CHAR);
 711     event.SetId(GetId());
 712     event.m_keyCode = keycode;
 713     event.SetEventObject(this);
 714
 715     // Only if wxTextCtrl::OnChar is called will this be set to True (and
 716     // the character passed through)
 717     cbs->doit = False;
 718
 719     GetEventHandler()->ProcessEvent(event);
 720
 721     if ( !InSetValue() && m_processedDefault )
 722     {
 723         // Can generate a command
 724         wxCommandEvent commandEvent(wxEVT_COMMAND_TEXT_UPDATED, GetId());
 725         commandEvent.SetEventObject(this);
 726         ProcessCommand(commandEvent);
 727     }
 728
 729     // do it after the (user) event handlers processed the events because
 730     // otherwise GetValue() would return incorrect (not yet updated value)
 731     m_tempCallbackStruct = NULL;
 732 }
 733
 734 // ----------------------------------------------------------------------------
 735 // helpers and Motif callbacks
 736 // ----------------------------------------------------------------------------
 737
 738 static void MergeChangesIntoString(wxString& value,
 739                                    XmTextVerifyCallbackStruct *cbs)
 740 {
 741     /* _sm_
 742      * At least on my system (SunOS 4.1.3 + Motif 1.2), you need to think of
 743      * every event as a replace event.  cbs->text->ptr gives the replacement
 744      * text, cbs->startPos gives the index of the first char affected by the
 745      * replace, and cbs->endPos gives the index one more than the last char
 746      * affected by the replace (startPos == endPos implies an empty range).
 747      * Hence, a deletion is represented by replacing all input text with a
 748      * blank string ("", *not* NULL!).  A simple insertion that does not
 749      * overwrite any text has startPos == endPos.
 750      */
 751
 752     if ( !value )
 753     {
 754         // easy case: the ol value was empty
 755         value = cbs->text->ptr;
 756     }
 757     else
 758     {
 759         // merge the changes into the value
 760         const char * const passwd = value;
 761         int len = value.length();
 762
 763         len += strlen(cbs->text->ptr) + 1;     // + new text (if any) + NUL
 764         len -= cbs->endPos - cbs->startPos;    // - text from affected region.
 765
 766         char * newS = new char [len];
 767         char * dest = newS,
 768              * insert = cbs->text->ptr;
 769
 770         // Copy (old) text from passwd, up to the start posn of the change.
 771         int i;
 772         const char * p = passwd;
 773         for (i = 0; i < cbs->startPos; ++i)
 774             *dest++ = *p++;
 775
 776         // Copy the text to be inserted).
 777         while (*insert)
 778             *dest++ = *insert++;
 779
 780         // Finally, copy into newS any remaining text from passwd[endPos] on.
 781         for (p = passwd + cbs->endPos; *p; )
 782             *dest++ = *p++;
 783         *dest = 0;
 784
 785         value = newS;
 786
 787         delete[] newS;
 788     }
 789 }
 790
 791 static void
 792 wxTextWindowChangedProc (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 793 {
 794     if (!wxGetWindowFromTable(w))
 795         // Widget has been deleted!
 796         return;
 797
 798     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 799     tw->SetModified(TRUE);
 800 }
 801
 802 static void
 803 wxTextWindowModifyProc (Widget WXUNUSED(w), XtPointer clientData, XmTextVerifyCallbackStruct *cbs)
 804 {
 805     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 806     tw->m_processedDefault = FALSE;
 807
 808     // First, do some stuff if it's a password control: in this case, we need
 809     // to store the string inside the class because GetValue() can't retrieve
 810     // it from the text ctrl. We do *not* do it in other circumstances because
 811     // it would double the amount of memory needed.
 812
 813     if ( tw->GetWindowStyleFlag() & wxTE_PASSWORD )
 814     {
 815         MergeChangesIntoString(tw->m_value, cbs);
 816
 817         if ( cbs->text->length > 0 )
 818         {
 819             int i;
 820             for (i = 0; i < cbs->text->length; ++i)
 821                 cbs->text->ptr[i] = '*';
 822             cbs->text->ptr[i] = '\0';
 823         }
 824     }
 825
 826     // If we're already within an OnChar, return: probably a programmatic
 827     // insertion.
 828     if (tw->m_tempCallbackStruct)
 829         return;
 830
 831     // Check for a backspace
 832     if (cbs->startPos == (cbs->currInsert - 1))
 833     {
 834         tw->DoSendEvents((void *)cbs, WXK_DELETE);
 835
 836         return;
 837     }
 838
 839     // Pasting operation: let it through without calling OnChar
 840     if (cbs->text->length > 1)
 841         return;
 842
 843     // Something other than text
 844     if (cbs->text->ptr == NULL)
 845         return;
 846
 847     // normal key press
 848     char ch = cbs->text->ptr[0];
 849     tw->DoSendEvents((void *)cbs, ch == '\n' ? '\r' : ch);
 850 }
 851
 852 static void
 853 wxTextWindowGainFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 854 {
 855     if (!wxGetWindowFromTable(w))
 856         return;
 857
 858     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 859     wxFocusEvent event(wxEVT_SET_FOCUS, tw->GetId());
 860     event.SetEventObject(tw);
 861     tw->GetEventHandler()->ProcessEvent(event);
 862 }
 863
 864 static void
 865 wxTextWindowLoseFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 866 {
 867     if (!wxGetWindowFromTable(w))
 868         return;
 869
 870     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 871     wxFocusEvent event(wxEVT_KILL_FOCUS, tw->GetId());
 872     event.SetEventObject(tw);
 873     tw->GetEventHandler()->ProcessEvent(event);
 874 }
 875
 876 static void wxTextWindowActivateProc(Widget w, XtPointer clientData,
 877                                      XmAnyCallbackStruct *WXUNUSED(ptr))
 878 {
 879     if (!wxGetWindowFromTable(w))
 880         return;
 881
 882     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 883
 884     if (tw->InSetValue())
 885         return;
 886
 887     wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER);
 888     event.SetId(tw->GetId());
 889     event.SetEventObject(tw);
 890     tw->ProcessCommand(event);
 891 }
 892
 893 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
 894 {
 895     Cut();
 896 }
 897
 898 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
 899 {
 900     Copy();
 901 }
 902
 903 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
 904 {
 905     Paste();
 906 }
 907
 908 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
 909 {
 910     Undo();
 911 }
 912
 913 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
 914 {
 915     Redo();
 916 }
 917
 918 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
 919 {
 920     event.Enable( CanCut() );
 921 }
 922
 923 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
 924 {
 925     event.Enable( CanCopy() );
 926 }
 927
 928 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
 929 {
 930     event.Enable( CanPaste() );
 931 }
 932
 933 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
 934 {
 935     event.Enable( CanUndo() );
 936 }
 937
 938 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
 939 {
 940     event.Enable( CanRedo() );
 941 }