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 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __VMS
  24 #define XtParent XTPARENT
  25 #endif
  26
  27 #include "wx/defs.h"
  28
  29 #include <sys/types.h>
  30 #include <sys/stat.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     if( !CreateControl( parent, id, pos, size, style, validator, name ) )
 110         return false;
 111
 112     m_tempCallbackStruct = (void*) NULL;
 113     m_modified = false;
 114     m_processedDefault = false;
 115
 116     m_backgroundColour = *wxWHITE;
 117
 118     Widget parentWidget = (Widget) parent->GetClientWidget();
 119
 120     Bool wantHorizScroll = (m_windowStyle & wxHSCROLL) != 0 ? True : False;
 121     // If we don't have horizontal scrollbars, we want word wrap.
 122     // OpenMotif 2.1 crashes if wantWordWrap is True in Japanese
 123     // locale (and probably other multibyte locales). The check might be
 124     // more precise
 125 #if wxCHECK_LESSTIF() || wxCHECK_MOTIF_VERSION( 2, 2 )
 126     Bool wantWordWrap = wantHorizScroll == True ? False : True;
 127 #else
 128     Bool wantWordWrap = False;
 129 #endif
 130
 131     if (m_windowStyle & wxTE_MULTILINE)
 132     {
 133         Arg args[8];
 134         int count = 0;
 135         XtSetArg (args[count], XmNscrollHorizontal, wantHorizScroll); ++count;
 136         XtSetArg (args[count], (String) wxFont::GetFontTag(),
 137                   m_font.GetFontType( XtDisplay(parentWidget) ) ); ++count;
 138         XtSetArg (args[count], XmNwordWrap, wantWordWrap); ++count;
 139         XtSetArg (args[count], XmNvalue, value.c_str()); ++count;
 140         XtSetArg (args[count], XmNeditable,
 141                   style & wxTE_READONLY ? False : True); ++count;
 142         XtSetArg (args[count], XmNeditMode, XmMULTI_LINE_EDIT ); ++count;
 143
 144         m_mainWidget =
 145             (WXWidget) XmCreateScrolledText(parentWidget,
 146                                             wxConstCast(name.c_str(), char),
 147                                             args, count);
 148
 149         XtManageChild ((Widget) m_mainWidget);
 150     }
 151     else
 152     {
 153         m_mainWidget = (WXWidget)XtVaCreateManagedWidget
 154                                  (
 155                                   wxConstCast(name.c_str(), char),
 156                                   xmTextWidgetClass,
 157                                   parentWidget,
 158                                   wxFont::GetFontTag(), m_font.GetFontType( XtDisplay(parentWidget) ),
 159                                   XmNvalue, value.c_str(),
 160                                   XmNeditable, (style & wxTE_READONLY) ?
 161                                       False : True,
 162                                   NULL
 163                                  );
 164
 165 #if 0
 166         // TODO: Is this relevant? What does it do?
 167         int noCols = 2;
 168         if (!value.IsNull() && (value.Length() > (unsigned int) noCols))
 169             noCols = value.Length();
 170         XtVaSetValues((Widget) m_mainWidget,
 171                       XmNcolumns, noCols,
 172                       NULL);
 173 #endif
 174     }
 175
 176     // remove border if asked for
 177     if ( style & wxNO_BORDER )
 178     {
 179         XtVaSetValues((Widget)m_mainWidget,
 180                       XmNshadowThickness, 0,
 181                       NULL);
 182     }
 183
 184     // install callbacks
 185     XtAddCallback((Widget) m_mainWidget, XmNvalueChangedCallback, (XtCallbackProc)wxTextWindowChangedProc, (XtPointer)this);
 186
 187     XtAddCallback((Widget) m_mainWidget, XmNmodifyVerifyCallback, (XtCallbackProc)wxTextWindowModifyProc, (XtPointer)this);
 188
 189     XtAddCallback((Widget) m_mainWidget, XmNactivateCallback, (XtCallbackProc)wxTextWindowActivateProc, (XtPointer)this);
 190
 191     XtAddCallback((Widget) m_mainWidget, XmNfocusCallback, (XtCallbackProc)wxTextWindowGainFocusProc, (XtPointer)this);
 192
 193     XtAddCallback((Widget) m_mainWidget, XmNlosingFocusCallback, (XtCallbackProc)wxTextWindowLoseFocusProc, (XtPointer)this);
 194
 195     AttachWidget (parent, m_mainWidget, (WXWidget) NULL,
 196                   pos.x, pos.y, size.x, size.y);
 197
 198     ChangeBackgroundColour();
 199
 200     return true;
 201 }
 202
 203 WXWidget wxTextCtrl::GetTopWidget() const
 204 {
 205     return IsMultiLine() ? (WXWidget)XtParent((Widget)m_mainWidget)
 206                          : m_mainWidget;
 207 }
 208
 209 wxString wxTextCtrl::GetValue() const
 210 {
 211     wxString str; // result
 212
 213     if (m_windowStyle & wxTE_PASSWORD)
 214     {
 215         // the value is stored always in m_value because it can't be retrieved
 216         // from the text control
 217         str = m_value;
 218     }
 219     else
 220     {
 221         // just get the string from Motif
 222         char *s = XmTextGetString ((Widget) m_mainWidget);
 223         if ( s )
 224         {
 225             str = s;
 226             XtFree (s);
 227         }
 228         //else: return empty string
 229
 230         if ( m_tempCallbackStruct )
 231         {
 232             // the string in the control isn't yet updated, can't use it as is
 233             MergeChangesIntoString(str, (XmTextVerifyCallbackStruct *)
 234                                    m_tempCallbackStruct);
 235         }
 236     }
 237
 238     return str;
 239 }
 240
 241 void wxTextCtrl::SetValue(const wxString& text)
 242 {
 243     m_inSetValue = true;
 244
 245     XmTextSetString ((Widget) m_mainWidget, wxConstCast(text.c_str(), char));
 246     XtVaSetValues ((Widget) m_mainWidget,
 247                    XmNcursorPosition, text.length(),
 248                    NULL);
 249
 250     SetInsertionPoint(text.length());
 251     XmTextShowPosition ((Widget) m_mainWidget, text.length());
 252     m_modified = TRUE;
 253
 254     m_inSetValue = false;
 255 }
 256
 257 // Clipboard operations
 258 void wxTextCtrl::Copy()
 259 {
 260     XmTextCopy((Widget) m_mainWidget, CurrentTime);
 261 }
 262
 263 void wxTextCtrl::Cut()
 264 {
 265     XmTextCut((Widget) m_mainWidget, CurrentTime);
 266 }
 267
 268 void wxTextCtrl::Paste()
 269 {
 270     XmTextPaste((Widget) m_mainWidget);
 271 }
 272
 273 bool wxTextCtrl::CanCopy() const
 274 {
 275     // Can copy if there's a selection
 276     long from, to;
 277     GetSelection(& from, & to);
 278     return (from != to) ;
 279 }
 280
 281 bool wxTextCtrl::CanCut() const
 282 {
 283     // Can cut if there's a selection
 284     long from, to;
 285     GetSelection(& from, & to);
 286     return (from != to) && (IsEditable());
 287 }
 288
 289 bool wxTextCtrl::CanPaste() const
 290 {
 291     return IsEditable() ;
 292 }
 293
 294 // Undo/redo
 295 void wxTextCtrl::Undo()
 296 {
 297     // Not possible in Motif
 298 }
 299
 300 void wxTextCtrl::Redo()
 301 {
 302     // Not possible in Motif
 303 }
 304
 305 bool wxTextCtrl::CanUndo() const
 306 {
 307     // No Undo in Motif
 308     return false;
 309 }
 310
 311 bool wxTextCtrl::CanRedo() const
 312 {
 313     // No Redo in Motif
 314     return false;
 315 }
 316
 317 // If the return values from and to are the same, there is no
 318 // selection.
 319 void wxTextCtrl::GetSelection(long* from, long* to) const
 320 {
 321     XmTextPosition left, right;
 322
 323     XmTextGetSelectionPosition((Widget) m_mainWidget, & left, & right);
 324
 325     *from = (long) left;
 326     *to = (long) right;
 327 }
 328
 329 bool wxTextCtrl::IsEditable() const
 330 {
 331     return (XmTextGetEditable((Widget) m_mainWidget) != 0);
 332 }
 333
 334 void wxTextCtrl::SetEditable(bool editable)
 335 {
 336     XmTextSetEditable((Widget) m_mainWidget, (Boolean) editable);
 337 }
 338
 339 void wxTextCtrl::SetInsertionPoint(long pos)
 340 {
 341     XmTextSetInsertionPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 342 }
 343
 344 void wxTextCtrl::SetInsertionPointEnd()
 345 {
 346     wxTextPos pos = GetLastPosition();
 347     SetInsertionPoint(pos);
 348 }
 349
 350 long wxTextCtrl::GetInsertionPoint() const
 351 {
 352     return (long) XmTextGetInsertionPosition ((Widget) m_mainWidget);
 353 }
 354
 355 wxTextPos wxTextCtrl::GetLastPosition() const
 356 {
 357     return (long) XmTextGetLastPosition ((Widget) m_mainWidget);
 358 }
 359
 360 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 361 {
 362     XmTextReplace ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 363         wxConstCast(value.c_str(), char));
 364 }
 365
 366 void wxTextCtrl::Remove(long from, long to)
 367 {
 368     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 369                       (Time) 0);
 370     XmTextRemove ((Widget) m_mainWidget);
 371 }
 372
 373 void wxTextCtrl::SetSelection(long from, long to)
 374 {
 375     if( to == -1 )
 376         to = GetLastPosition();
 377
 378     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 379                       (Time) 0);
 380 }
 381
 382 void wxTextCtrl::WriteText(const wxString& text)
 383 {
 384     long textPosition = GetInsertionPoint() + text.length();
 385     XmTextInsert ((Widget) m_mainWidget, GetInsertionPoint(),
 386                   wxConstCast(text.c_str(), char));
 387     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 388     SetInsertionPoint(textPosition);
 389     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 390     m_modified = true;
 391 }
 392
 393 void wxTextCtrl::AppendText(const wxString& text)
 394 {
 395     wxTextPos textPosition = GetLastPosition() + text.length();
 396     XmTextInsert ((Widget) m_mainWidget, GetLastPosition(),
 397                   wxConstCast(text.c_str(), char));
 398     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 399     SetInsertionPoint(textPosition);
 400     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 401     m_modified = true;
 402 }
 403
 404 void wxTextCtrl::Clear()
 405 {
 406     XmTextSetString ((Widget) m_mainWidget, wxMOTIF_STR(""));
 407     m_modified = false;
 408 }
 409
 410 bool wxTextCtrl::IsModified() const
 411 {
 412     return m_modified;
 413 }
 414
 415 // Makes modified or unmodified
 416 void wxTextCtrl::MarkDirty()
 417 {
 418     m_modified = true;
 419 }
 420
 421 void wxTextCtrl::DiscardEdits()
 422 {
 423     m_modified = false;
 424 }
 425
 426 int wxTextCtrl::GetNumberOfLines() const
 427 {
 428     // HIDEOUSLY inefficient, but we have no choice.
 429     char *s = XmTextGetString ((Widget) m_mainWidget);
 430     if (s)
 431     {
 432         long i = 0;
 433         int currentLine = 0;
 434         bool finished = false;
 435         while (!finished)
 436         {
 437             int ch = s[i];
 438             if (ch == '\n')
 439             {
 440                 currentLine++;
 441                 i++;
 442             }
 443             else if (ch == 0)
 444             {
 445                 finished = true;
 446             }
 447             else
 448                 i++;
 449         }
 450
 451         XtFree (s);
 452         return currentLine;
 453     }
 454     return 0;
 455 }
 456
 457 long wxTextCtrl::XYToPosition(long x, long y) const
 458 {
 459 /* It seems, that there is a bug in some versions of the Motif library,
 460     so the original wxWin-Code doesn't work. */
 461     /*
 462     Widget textWidget = (Widget) handle;
 463     return (long) XmTextXYToPos (textWidget, (Position) x, (Position) y);
 464     */
 465     /* Now a little workaround: */
 466     long r=0;
 467     for (int i=0; i<y; i++) r+=(GetLineLength(i)+1);
 468     return r+x;
 469 }
 470
 471 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 472 {
 473     Position xx, yy;
 474     XmTextPosToXY((Widget) m_mainWidget, pos, &xx, &yy);
 475     if ( x )
 476         *x = xx;
 477     if ( y )
 478         *y = yy;
 479
 480     return true;
 481 }
 482
 483 void wxTextCtrl::ShowPosition(long pos)
 484 {
 485     XmTextShowPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 486 }
 487
 488 int wxTextCtrl::GetLineLength(long lineNo) const
 489 {
 490     wxString str = GetLineText (lineNo);
 491     return (int) str.Length();
 492 }
 493
 494 wxString wxTextCtrl::GetLineText(long lineNo) const
 495 {
 496     // HIDEOUSLY inefficient, but we have no choice.
 497     char *s = XmTextGetString ((Widget) m_mainWidget);
 498
 499     if (s)
 500     {
 501         wxString buf("");
 502         long i;
 503         int currentLine = 0;
 504         for (i = 0; currentLine != lineNo && s[i]; i++ )
 505             if (s[i] == '\n')
 506                 currentLine++;
 507             // Now get the text
 508             int j;
 509             for (j = 0; s[i] && s[i] != '\n'; i++, j++ )
 510                 buf += s[i];
 511
 512             XtFree(s);
 513             return buf;
 514     }
 515     else
 516         return wxEmptyString;
 517 }
 518
 519 /*
 520 * Text item
 521 */
 522
 523 void wxTextCtrl::Command(wxCommandEvent & event)
 524 {
 525     SetValue (event.GetString());
 526     ProcessCommand (event);
 527 }
 528
 529 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 530 {
 531     // By default, load the first file into the text window.
 532     if (event.GetNumberOfFiles() > 0)
 533     {
 534         LoadFile(event.GetFiles()[0]);
 535     }
 536 }
 537
 538 void wxTextCtrl::OnChar(wxKeyEvent& event)
 539 {
 540     // Indicates that we should generate a normal command, because
 541     // we're letting default behaviour happen (otherwise it's vetoed
 542     // by virtue of overriding OnChar)
 543     m_processedDefault = true;
 544
 545     if (m_tempCallbackStruct)
 546     {
 547         XmTextVerifyCallbackStruct *textStruct =
 548             (XmTextVerifyCallbackStruct *) m_tempCallbackStruct;
 549         textStruct->doit = True;
 550         if (isascii(event.m_keyCode) && (textStruct->text->length == 1))
 551         {
 552             textStruct->text->ptr[0] = ((event.m_keyCode == WXK_RETURN) ? 10 : event.m_keyCode);
 553         }
 554     }
 555 }
 556
 557 void wxTextCtrl::ChangeFont(bool keepOriginalSize)
 558 {
 559     wxWindow::ChangeFont(keepOriginalSize);
 560 }
 561
 562 void wxTextCtrl::ChangeBackgroundColour()
 563 {
 564     wxWindow::ChangeBackgroundColour();
 565
 566     /* TODO: should scrollbars be affected? Should probably have separate
 567     * function to change them (by default, taken from wxSystemSettings)
 568     */
 569     if (m_windowStyle & wxTE_MULTILINE)
 570     {
 571         Widget parent = XtParent ((Widget) m_mainWidget);
 572         Widget hsb, vsb;
 573
 574         XtVaGetValues (parent,
 575             XmNhorizontalScrollBar, &hsb,
 576             XmNverticalScrollBar, &vsb,
 577             NULL);
 578         wxColour backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
 579         if (hsb)
 580             wxDoChangeBackgroundColour((WXWidget) hsb, backgroundColour, true);
 581         if (vsb)
 582             wxDoChangeBackgroundColour((WXWidget) vsb, backgroundColour, true);
 583
 584         // MBN: why change parent background?
 585         // DoChangeBackgroundColour((WXWidget) parent, m_backgroundColour, true);
 586     }
 587 }
 588
 589 void wxTextCtrl::ChangeForegroundColour()
 590 {
 591     wxWindow::ChangeForegroundColour();
 592
 593     if (m_windowStyle & wxTE_MULTILINE)
 594     {
 595         Widget parent = XtParent ((Widget) m_mainWidget);
 596         Widget hsb, vsb;
 597
 598         XtVaGetValues (parent,
 599             XmNhorizontalScrollBar, &hsb,
 600             XmNverticalScrollBar, &vsb,
 601             NULL);
 602
 603             /* TODO: should scrollbars be affected? Should probably have separate
 604             * function to change them (by default, taken from wxSystemSettings)
 605             if (hsb)
 606             DoChangeForegroundColour((WXWidget) hsb, m_foregroundColour);
 607             if (vsb)
 608             DoChangeForegroundColour((WXWidget) vsb, m_foregroundColour);
 609         */
 610         wxDoChangeForegroundColour((WXWidget) parent, m_foregroundColour);
 611     }
 612 }
 613
 614 void wxTextCtrl::DoSendEvents(void *wxcbs, long keycode)
 615 {
 616     // we're in process of updating the text control
 617     m_tempCallbackStruct = wxcbs;
 618
 619     XmTextVerifyCallbackStruct *cbs = (XmTextVerifyCallbackStruct *)wxcbs;
 620
 621     wxKeyEvent event (wxEVT_CHAR);
 622     event.SetId(GetId());
 623     event.m_keyCode = keycode;
 624     event.SetEventObject(this);
 625
 626     // Only if wxTextCtrl::OnChar is called will this be set to True (and
 627     // the character passed through)
 628     cbs->doit = False;
 629
 630     GetEventHandler()->ProcessEvent(event);
 631
 632     if ( !InSetValue() && m_processedDefault )
 633     {
 634         // Can generate a command
 635         wxCommandEvent commandEvent(wxEVT_COMMAND_TEXT_UPDATED, GetId());
 636         commandEvent.SetEventObject(this);
 637         ProcessCommand(commandEvent);
 638     }
 639
 640     // do it after the (user) event handlers processed the events because
 641     // otherwise GetValue() would return incorrect (not yet updated value)
 642     m_tempCallbackStruct = NULL;
 643 }
 644
 645 wxSize wxDoGetSingleTextCtrlBestSize( Widget textWidget,
 646                                       const wxWindow* window )
 647 {
 648     Dimension xmargin, ymargin, highlight, shadow;
 649     char* value;
 650
 651     XtVaGetValues( textWidget,
 652                    XmNmarginWidth, &xmargin,
 653                    XmNmarginHeight, &ymargin,
 654                    XmNvalue, &value,
 655                    XmNhighlightThickness, &highlight,
 656                    XmNshadowThickness, &shadow,
 657                    NULL );
 658
 659     if( !value )
 660         value = wxMOTIF_STR("|");
 661
 662     int x, y;
 663     window->GetTextExtent( value, &x, &y );
 664
 665     if( x < 100 )
 666         x = 100;
 667
 668     return wxSize( x + 2 * xmargin + 2 * highlight + 2 * shadow,
 669                    // MBN: +2 necessary: Lesstif bug or mine?
 670                    y + 2 * ymargin + 2 * highlight + 2 * shadow + 2 );
 671 }
 672
 673 wxSize wxTextCtrl::DoGetBestSize() const
 674 {
 675     if( IsSingleLine() )
 676     {
 677         wxSize best = wxControl::DoGetBestSize();
 678
 679         if( best.x < 110 ) best.x = 110;
 680
 681         return best;
 682     }
 683     else
 684         return wxWindow::DoGetBestSize();
 685 }
 686
 687 // ----------------------------------------------------------------------------
 688 // helpers and Motif callbacks
 689 // ----------------------------------------------------------------------------
 690
 691 static void MergeChangesIntoString(wxString& value,
 692                                    XmTextVerifyCallbackStruct *cbs)
 693 {
 694     /* _sm_
 695      * At least on my system (SunOS 4.1.3 + Motif 1.2), you need to think of
 696      * every event as a replace event.  cbs->text->ptr gives the replacement
 697      * text, cbs->startPos gives the index of the first char affected by the
 698      * replace, and cbs->endPos gives the index one more than the last char
 699      * affected by the replace (startPos == endPos implies an empty range).
 700      * Hence, a deletion is represented by replacing all input text with a
 701      * blank string ("", *not* NULL!).  A simple insertion that does not
 702      * overwrite any text has startPos == endPos.
 703      */
 704
 705     if ( !value )
 706     {
 707         // easy case: the ol value was empty
 708         value = cbs->text->ptr;
 709     }
 710     else
 711     {
 712         // merge the changes into the value
 713         const char * const passwd = value;
 714         int len = value.length();
 715
 716         len += ( cbs->text->ptr ?
 717                  strlen(cbs->text->ptr) :
 718                  0 ) + 1;                      // + new text (if any) + NUL
 719         len -= cbs->endPos - cbs->startPos;    // - text from affected region.
 720
 721         char * newS = new char [len];
 722         char * dest = newS,
 723              * insert = cbs->text->ptr;
 724
 725         // Copy (old) text from passwd, up to the start posn of the change.
 726         int i;
 727         const char * p = passwd;
 728         for (i = 0; i < cbs->startPos; ++i)
 729             *dest++ = *p++;
 730
 731         // Copy the text to be inserted).
 732         if (insert)
 733             while (*insert)
 734                 *dest++ = *insert++;
 735
 736         // Finally, copy into newS any remaining text from passwd[endPos] on.
 737         for (p = passwd + cbs->endPos; *p; )
 738             *dest++ = *p++;
 739         *dest = 0;
 740
 741         value = newS;
 742
 743         delete[] newS;
 744     }
 745 }
 746
 747 static void
 748 wxTextWindowChangedProc (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 749 {
 750     if (!wxGetWindowFromTable(w))
 751         // Widget has been deleted!
 752         return;
 753
 754     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 755     tw->SetModified(true);
 756 }
 757
 758 static void
 759 wxTextWindowModifyProc (Widget WXUNUSED(w), XtPointer clientData, XmTextVerifyCallbackStruct *cbs)
 760 {
 761     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 762     tw->m_processedDefault = false;
 763
 764     // First, do some stuff if it's a password control: in this case, we need
 765     // to store the string inside the class because GetValue() can't retrieve
 766     // it from the text ctrl. We do *not* do it in other circumstances because
 767     // it would double the amount of memory needed.
 768
 769     if ( tw->GetWindowStyleFlag() & wxTE_PASSWORD )
 770     {
 771         MergeChangesIntoString(tw->m_value, cbs);
 772
 773         if ( cbs->text->length > 0 )
 774         {
 775             int i;
 776             for (i = 0; i < cbs->text->length; ++i)
 777                 cbs->text->ptr[i] = '*';
 778             cbs->text->ptr[i] = '\0';
 779         }
 780     }
 781
 782     if(tw->InSetValue())
 783         return;
 784
 785     // If we're already within an OnChar, return: probably a programmatic
 786     // insertion.
 787     if (tw->m_tempCallbackStruct)
 788         return;
 789
 790     // Check for a backspace
 791     if (cbs->startPos == (cbs->currInsert - 1))
 792     {
 793         tw->DoSendEvents((void *)cbs, WXK_DELETE);
 794
 795         return;
 796     }
 797
 798     // Pasting operation: let it through without calling OnChar
 799     if (cbs->text->length > 1)
 800         return;
 801
 802     // Something other than text
 803     if (cbs->text->ptr == NULL)
 804         return;
 805
 806     // normal key press
 807     char ch = cbs->text->ptr[0];
 808     tw->DoSendEvents((void *)cbs, ch == '\n' ? '\r' : ch);
 809 }
 810
 811 static void
 812 wxTextWindowGainFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 813 {
 814     if (!wxGetWindowFromTable(w))
 815         return;
 816
 817     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 818     wxFocusEvent event(wxEVT_SET_FOCUS, tw->GetId());
 819     event.SetEventObject(tw);
 820     tw->GetEventHandler()->ProcessEvent(event);
 821 }
 822
 823 static void
 824 wxTextWindowLoseFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 825 {
 826     if (!wxGetWindowFromTable(w))
 827         return;
 828
 829     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 830     wxFocusEvent event(wxEVT_KILL_FOCUS, tw->GetId());
 831     event.SetEventObject(tw);
 832     tw->GetEventHandler()->ProcessEvent(event);
 833 }
 834
 835 static void wxTextWindowActivateProc(Widget w, XtPointer clientData,
 836                                      XmAnyCallbackStruct *WXUNUSED(ptr))
 837 {
 838     if (!wxGetWindowFromTable(w))
 839         return;
 840
 841     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 842
 843     if (tw->InSetValue())
 844         return;
 845
 846     wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER);
 847     event.SetId(tw->GetId());
 848     event.SetEventObject(tw);
 849     tw->ProcessCommand(event);
 850 }
 851
 852 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
 853 {
 854     Cut();
 855 }
 856
 857 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
 858 {
 859     Copy();
 860 }
 861
 862 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
 863 {
 864     Paste();
 865 }
 866
 867 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
 868 {
 869     Undo();
 870 }
 871
 872 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
 873 {
 874     Redo();
 875 }
 876
 877 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
 878 {
 879     event.Enable( CanCut() );
 880 }
 881
 882 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
 883 {
 884     event.Enable( CanCopy() );
 885 }
 886
 887 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
 888 {
 889     event.Enable( CanPaste() );
 890 }
 891
 892 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
 893 {
 894     event.Enable( CanUndo() );
 895 }
 896
 897 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
 898 {
 899     event.Enable( CanRedo() );
 900 }