src/motif/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/motif/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 <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <ctype.h>
  30
  31 #include "wx/textctrl.h"
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/utils.h"
  35     #include "wx/settings.h"
  36 #endif
  37
  38 #include "wx/filefn.h"
  39
  40 #ifdef __VMS__
  41 #pragma message disable nosimpint
  42 #endif
  43 #include <Xm/Text.h>
  44 #ifdef __VMS__
  45 #pragma message enable nosimpint
  46 #endif
  47
  48 #include "wx/motif/private.h"
  49
  50 // ----------------------------------------------------------------------------
  51 // private functions
  52 // ----------------------------------------------------------------------------
  53
  54 // helper: inserts the new text in the value of the text ctrl and returns the
  55 // result in place
  56 static void MergeChangesIntoString(wxString& value,
  57                                    XmTextVerifyCallbackStruct *textStruct);
  58
  59 // callbacks
  60 static void wxTextWindowChangedProc(Widget w, XtPointer clientData, XtPointer ptr);
  61 static void wxTextWindowModifyProc(Widget w, XtPointer clientData, XmTextVerifyCallbackStruct *cbs);
  62 static void wxTextWindowGainFocusProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs);
  63 static void wxTextWindowLoseFocusProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *cbs);
  64 static void wxTextWindowActivateProc(Widget w, XtPointer clientData, XmAnyCallbackStruct *ptr);
  65
  66     IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
  67
  68     BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
  69         EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
  70         EVT_CHAR(wxTextCtrl::OnChar)
  71
  72     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
  73     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
  74     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
  75     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
  76     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
  77
  78     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
  79     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
  80     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
  81     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
  82     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
  83
  84     END_EVENT_TABLE()
  85
  86 // ============================================================================
  87 // implementation
  88 // ============================================================================
  89
  90 // ----------------------------------------------------------------------------
  91 // wxTextCtrl
  92 // ----------------------------------------------------------------------------
  93
  94 // Text item
  95 wxTextCtrl::wxTextCtrl()
  96 {
  97     m_tempCallbackStruct = (void*) NULL;
  98     m_modified = false;
  99     m_processedDefault = false;
 100 }
 101
 102 bool wxTextCtrl::Create(wxWindow *parent,
 103                         wxWindowID id,
 104                         const wxString& value,
 105                         const wxPoint& pos,
 106                         const wxSize& size,
 107                         long style,
 108                         const wxValidator& validator,
 109                         const wxString& name)
 110 {
 111     if( !CreateControl( parent, id, pos, size, style, validator, name ) )
 112         return false;
 113
 114     m_tempCallbackStruct = (void*) NULL;
 115     m_modified = false;
 116     m_processedDefault = false;
 117
 118     m_backgroundColour = *wxWHITE;
 119
 120     Widget parentWidget = (Widget) parent->GetClientWidget();
 121
 122     Bool wantHorizScroll = (m_windowStyle & wxHSCROLL) != 0 ? True : False;
 123     // If we don't have horizontal scrollbars, we want word wrap.
 124     // OpenMotif 2.1 crashes if wantWordWrap is True in Japanese
 125     // locale (and probably other multibyte locales). The check might be
 126     // more precise
 127 #if wxCHECK_LESSTIF() || wxCHECK_MOTIF_VERSION( 2, 2 )
 128     Bool wantWordWrap = wantHorizScroll == True ? False : True;
 129 #else
 130     Bool wantWordWrap = False;
 131 #endif
 132
 133     if (m_windowStyle & wxTE_MULTILINE)
 134     {
 135         Arg args[8];
 136         int count = 0;
 137         XtSetArg (args[count], XmNscrollHorizontal, wantHorizScroll); ++count;
 138         XtSetArg (args[count], (String) wxFont::GetFontTag(),
 139                   m_font.GetFontType( XtDisplay(parentWidget) ) ); ++count;
 140         XtSetArg (args[count], XmNwordWrap, wantWordWrap); ++count;
 141         XtSetArg (args[count], XmNvalue, value.c_str()); ++count;
 142         XtSetArg (args[count], XmNeditable,
 143                   style & wxTE_READONLY ? False : True); ++count;
 144         XtSetArg (args[count], XmNeditMode, XmMULTI_LINE_EDIT ); ++count;
 145
 146         m_mainWidget =
 147             (WXWidget) XmCreateScrolledText(parentWidget,
 148                                             wxConstCast(name.c_str(), char),
 149                                             args, count);
 150
 151         XtManageChild ((Widget) m_mainWidget);
 152     }
 153     else
 154     {
 155         m_mainWidget = (WXWidget)XtVaCreateManagedWidget
 156                                  (
 157                                   wxConstCast(name.c_str(), char),
 158                                   xmTextWidgetClass,
 159                                   parentWidget,
 160                                   wxFont::GetFontTag(), m_font.GetFontType( XtDisplay(parentWidget) ),
 161                                   XmNvalue, value.c_str(),
 162                                   XmNeditable, (style & wxTE_READONLY) ?
 163                                       False : True,
 164                                   NULL
 165                                  );
 166
 167 #if 0
 168         // TODO: Is this relevant? What does it do?
 169         int noCols = 2;
 170         if (!value.IsNull() && (value.length() > (unsigned int) noCols))
 171             noCols = value.length();
 172         XtVaSetValues((Widget) m_mainWidget,
 173                       XmNcolumns, noCols,
 174                       NULL);
 175 #endif
 176     }
 177
 178     // remove border if asked for
 179     if ( style & wxNO_BORDER )
 180     {
 181         XtVaSetValues((Widget)m_mainWidget,
 182                       XmNshadowThickness, 0,
 183                       NULL);
 184     }
 185
 186     // install callbacks
 187     XtAddCallback((Widget) m_mainWidget, XmNvalueChangedCallback, (XtCallbackProc)wxTextWindowChangedProc, (XtPointer)this);
 188
 189     XtAddCallback((Widget) m_mainWidget, XmNmodifyVerifyCallback, (XtCallbackProc)wxTextWindowModifyProc, (XtPointer)this);
 190
 191     XtAddCallback((Widget) m_mainWidget, XmNactivateCallback, (XtCallbackProc)wxTextWindowActivateProc, (XtPointer)this);
 192
 193     XtAddCallback((Widget) m_mainWidget, XmNfocusCallback, (XtCallbackProc)wxTextWindowGainFocusProc, (XtPointer)this);
 194
 195     XtAddCallback((Widget) m_mainWidget, XmNlosingFocusCallback, (XtCallbackProc)wxTextWindowLoseFocusProc, (XtPointer)this);
 196
 197     AttachWidget (parent, m_mainWidget, (WXWidget) NULL,
 198                   pos.x, pos.y, size.x, size.y);
 199
 200     ChangeBackgroundColour();
 201
 202     return true;
 203 }
 204
 205 WXWidget wxTextCtrl::GetTopWidget() const
 206 {
 207     return IsMultiLine() ? (WXWidget)XtParent((Widget)m_mainWidget)
 208                          : m_mainWidget;
 209 }
 210
 211 wxString wxTextCtrl::GetValue() const
 212 {
 213     wxString str; // result
 214
 215     if (m_windowStyle & wxTE_PASSWORD)
 216     {
 217         // the value is stored always in m_value because it can't be retrieved
 218         // from the text control
 219         str = m_value;
 220     }
 221     else
 222     {
 223         // just get the string from Motif
 224         char *s = XmTextGetString ((Widget) m_mainWidget);
 225         if ( s )
 226         {
 227             str = s;
 228             XtFree (s);
 229         }
 230         //else: return empty string
 231
 232         if ( m_tempCallbackStruct )
 233         {
 234             // the string in the control isn't yet updated, can't use it as is
 235             MergeChangesIntoString(str, (XmTextVerifyCallbackStruct *)
 236                                    m_tempCallbackStruct);
 237         }
 238     }
 239
 240     return str;
 241 }
 242
 243 void wxTextCtrl::SetValue(const wxString& text)
 244 {
 245     m_inSetValue = true;
 246
 247     XmTextSetString ((Widget) m_mainWidget, wxConstCast(text.c_str(), char));
 248     XtVaSetValues ((Widget) m_mainWidget,
 249                    XmNcursorPosition, text.length(),
 250                    NULL);
 251
 252     SetInsertionPoint(text.length());
 253     XmTextShowPosition ((Widget) m_mainWidget, text.length());
 254     m_modified = true;
 255
 256     m_inSetValue = false;
 257 }
 258
 259 // Clipboard operations
 260 void wxTextCtrl::Copy()
 261 {
 262     XmTextCopy((Widget) m_mainWidget, CurrentTime);
 263 }
 264
 265 void wxTextCtrl::Cut()
 266 {
 267     XmTextCut((Widget) m_mainWidget, CurrentTime);
 268 }
 269
 270 void wxTextCtrl::Paste()
 271 {
 272     XmTextPaste((Widget) m_mainWidget);
 273 }
 274
 275 bool wxTextCtrl::CanCopy() const
 276 {
 277     // Can copy if there's a selection
 278     long from, to;
 279     GetSelection(& from, & to);
 280     return (from != to) ;
 281 }
 282
 283 bool wxTextCtrl::CanCut() const
 284 {
 285     // Can cut if there's a selection
 286     long from, to;
 287     GetSelection(& from, & to);
 288     return (from != to) && (IsEditable());
 289 }
 290
 291 bool wxTextCtrl::CanPaste() const
 292 {
 293     return IsEditable() ;
 294 }
 295
 296 // Undo/redo
 297 void wxTextCtrl::Undo()
 298 {
 299     // Not possible in Motif
 300 }
 301
 302 void wxTextCtrl::Redo()
 303 {
 304     // Not possible in Motif
 305 }
 306
 307 bool wxTextCtrl::CanUndo() const
 308 {
 309     // No Undo in Motif
 310     return false;
 311 }
 312
 313 bool wxTextCtrl::CanRedo() const
 314 {
 315     // No Redo in Motif
 316     return false;
 317 }
 318
 319 // If the return values from and to are the same, there is no
 320 // selection.
 321 void wxTextCtrl::GetSelection(long* from, long* to) const
 322 {
 323     XmTextPosition left, right;
 324
 325     XmTextGetSelectionPosition((Widget) m_mainWidget, & left, & right);
 326
 327     *from = (long) left;
 328     *to = (long) right;
 329 }
 330
 331 bool wxTextCtrl::IsEditable() const
 332 {
 333     return (XmTextGetEditable((Widget) m_mainWidget) != 0);
 334 }
 335
 336 void wxTextCtrl::SetEditable(bool editable)
 337 {
 338     XmTextSetEditable((Widget) m_mainWidget, (Boolean) editable);
 339 }
 340
 341 void wxTextCtrl::SetInsertionPoint(long pos)
 342 {
 343     XmTextSetInsertionPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 344 }
 345
 346 void wxTextCtrl::SetInsertionPointEnd()
 347 {
 348     wxTextPos pos = GetLastPosition();
 349     SetInsertionPoint(pos);
 350 }
 351
 352 long wxTextCtrl::GetInsertionPoint() const
 353 {
 354     return (long) XmTextGetInsertionPosition ((Widget) m_mainWidget);
 355 }
 356
 357 wxTextPos wxTextCtrl::GetLastPosition() const
 358 {
 359     return (long) XmTextGetLastPosition ((Widget) m_mainWidget);
 360 }
 361
 362 void wxTextCtrl::Replace(long from, long to, const wxString& value)
 363 {
 364     XmTextReplace ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 365         wxConstCast(value.c_str(), char));
 366 }
 367
 368 void wxTextCtrl::Remove(long from, long to)
 369 {
 370     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 371                       (Time) 0);
 372     XmTextRemove ((Widget) m_mainWidget);
 373 }
 374
 375 void wxTextCtrl::SetSelection(long from, long to)
 376 {
 377     if( to == -1 )
 378         to = GetLastPosition();
 379
 380     XmTextSetSelection ((Widget) m_mainWidget, (XmTextPosition) from, (XmTextPosition) to,
 381                       (Time) 0);
 382 }
 383
 384 void wxTextCtrl::WriteText(const wxString& text)
 385 {
 386     long textPosition = GetInsertionPoint() + text.length();
 387     XmTextInsert ((Widget) m_mainWidget, GetInsertionPoint(),
 388                   wxConstCast(text.c_str(), char));
 389     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 390     SetInsertionPoint(textPosition);
 391     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 392     m_modified = true;
 393 }
 394
 395 void wxTextCtrl::AppendText(const wxString& text)
 396 {
 397     wxTextPos textPosition = GetLastPosition() + text.length();
 398     XmTextInsert ((Widget) m_mainWidget, GetLastPosition(),
 399                   wxConstCast(text.c_str(), char));
 400     XtVaSetValues ((Widget) m_mainWidget, XmNcursorPosition, textPosition, NULL);
 401     SetInsertionPoint(textPosition);
 402     XmTextShowPosition ((Widget) m_mainWidget, textPosition);
 403     m_modified = true;
 404 }
 405
 406 void wxTextCtrl::Clear()
 407 {
 408     XmTextSetString ((Widget) m_mainWidget, wxMOTIF_STR(""));
 409     m_modified = false;
 410 }
 411
 412 bool wxTextCtrl::IsModified() const
 413 {
 414     return m_modified;
 415 }
 416
 417 // Makes modified or unmodified
 418 void wxTextCtrl::MarkDirty()
 419 {
 420     m_modified = true;
 421 }
 422
 423 void wxTextCtrl::DiscardEdits()
 424 {
 425     m_modified = false;
 426 }
 427
 428 int wxTextCtrl::GetNumberOfLines() const
 429 {
 430     // HIDEOUSLY inefficient, but we have no choice.
 431     char *s = XmTextGetString ((Widget) m_mainWidget);
 432     if (s)
 433     {
 434         long i = 0;
 435         int currentLine = 0;
 436         bool finished = false;
 437         while (!finished)
 438         {
 439             int ch = s[i];
 440             if (ch == '\n')
 441             {
 442                 currentLine++;
 443                 i++;
 444             }
 445             else if (ch == 0)
 446             {
 447                 finished = true;
 448             }
 449             else
 450                 i++;
 451         }
 452
 453         XtFree (s);
 454         return currentLine;
 455     }
 456     return 0;
 457 }
 458
 459 long wxTextCtrl::XYToPosition(long x, long y) const
 460 {
 461 /* It seems, that there is a bug in some versions of the Motif library,
 462     so the original wxWin-Code doesn't work. */
 463     /*
 464     Widget textWidget = (Widget) handle;
 465     return (long) XmTextXYToPos (textWidget, (Position) x, (Position) y);
 466     */
 467     /* Now a little workaround: */
 468     long r=0;
 469     for (int i=0; i<y; i++) r+=(GetLineLength(i)+1);
 470     return r+x;
 471 }
 472
 473 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
 474 {
 475     Position xx, yy;
 476     XmTextPosToXY((Widget) m_mainWidget, pos, &xx, &yy);
 477     if ( x )
 478         *x = xx;
 479     if ( y )
 480         *y = yy;
 481
 482     return true;
 483 }
 484
 485 void wxTextCtrl::ShowPosition(long pos)
 486 {
 487     XmTextShowPosition ((Widget) m_mainWidget, (XmTextPosition) pos);
 488 }
 489
 490 int wxTextCtrl::GetLineLength(long lineNo) const
 491 {
 492     wxString str = GetLineText (lineNo);
 493     return (int) str.length();
 494 }
 495
 496 wxString wxTextCtrl::GetLineText(long lineNo) const
 497 {
 498     // HIDEOUSLY inefficient, but we have no choice.
 499     char *s = XmTextGetString ((Widget) m_mainWidget);
 500
 501     if (s)
 502     {
 503         wxString buf;
 504         long i;
 505         int currentLine = 0;
 506         for (i = 0; currentLine != lineNo && s[i]; i++ )
 507             if (s[i] == '\n')
 508                 currentLine++;
 509             // Now get the text
 510             int j;
 511             for (j = 0; s[i] && s[i] != '\n'; i++, j++ )
 512                 buf += s[i];
 513
 514             XtFree(s);
 515             return buf;
 516     }
 517     else
 518         return wxEmptyString;
 519 }
 520
 521 /*
 522 * Text item
 523 */
 524
 525 void wxTextCtrl::Command(wxCommandEvent & event)
 526 {
 527     SetValue (event.GetString());
 528     ProcessCommand (event);
 529 }
 530
 531 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
 532 {
 533     // By default, load the first file into the text window.
 534     if (event.GetNumberOfFiles() > 0)
 535     {
 536         LoadFile(event.GetFiles()[0]);
 537     }
 538 }
 539
 540 void wxTextCtrl::OnChar(wxKeyEvent& event)
 541 {
 542     // Indicates that we should generate a normal command, because
 543     // we're letting default behaviour happen (otherwise it's vetoed
 544     // by virtue of overriding OnChar)
 545     m_processedDefault = true;
 546
 547     if (m_tempCallbackStruct)
 548     {
 549         XmTextVerifyCallbackStruct *textStruct =
 550             (XmTextVerifyCallbackStruct *) m_tempCallbackStruct;
 551         textStruct->doit = True;
 552         if (isascii(event.m_keyCode) && (textStruct->text->length == 1))
 553         {
 554             textStruct->text->ptr[0] = (char)((event.m_keyCode == WXK_RETURN) ? 10 : event.m_keyCode);
 555         }
 556     }
 557 }
 558
 559 void wxTextCtrl::ChangeFont(bool keepOriginalSize)
 560 {
 561     wxWindow::ChangeFont(keepOriginalSize);
 562 }
 563
 564 void wxTextCtrl::ChangeBackgroundColour()
 565 {
 566     wxWindow::ChangeBackgroundColour();
 567
 568     /* TODO: should scrollbars be affected? Should probably have separate
 569     * function to change them (by default, taken from wxSystemSettings)
 570     */
 571     if (m_windowStyle & wxTE_MULTILINE)
 572     {
 573         Widget parent = XtParent ((Widget) m_mainWidget);
 574         Widget hsb, vsb;
 575
 576         XtVaGetValues (parent,
 577             XmNhorizontalScrollBar, &hsb,
 578             XmNverticalScrollBar, &vsb,
 579             NULL);
 580         wxColour backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
 581         if (hsb)
 582             wxDoChangeBackgroundColour((WXWidget) hsb, backgroundColour, true);
 583         if (vsb)
 584             wxDoChangeBackgroundColour((WXWidget) vsb, backgroundColour, true);
 585
 586         // MBN: why change parent background?
 587         // DoChangeBackgroundColour((WXWidget) parent, m_backgroundColour, true);
 588     }
 589 }
 590
 591 void wxTextCtrl::ChangeForegroundColour()
 592 {
 593     wxWindow::ChangeForegroundColour();
 594
 595     if (m_windowStyle & wxTE_MULTILINE)
 596     {
 597         Widget parent = XtParent ((Widget) m_mainWidget);
 598         Widget hsb, vsb;
 599
 600         XtVaGetValues (parent,
 601             XmNhorizontalScrollBar, &hsb,
 602             XmNverticalScrollBar, &vsb,
 603             NULL);
 604
 605             /* TODO: should scrollbars be affected? Should probably have separate
 606             * function to change them (by default, taken from wxSystemSettings)
 607             if (hsb)
 608             DoChangeForegroundColour((WXWidget) hsb, m_foregroundColour);
 609             if (vsb)
 610             DoChangeForegroundColour((WXWidget) vsb, m_foregroundColour);
 611         */
 612         wxDoChangeForegroundColour((WXWidget) parent, m_foregroundColour);
 613     }
 614 }
 615
 616 void wxTextCtrl::DoSendEvents(void *wxcbs, long keycode)
 617 {
 618     // we're in process of updating the text control
 619     m_tempCallbackStruct = wxcbs;
 620
 621     XmTextVerifyCallbackStruct *cbs = (XmTextVerifyCallbackStruct *)wxcbs;
 622
 623     wxKeyEvent event (wxEVT_CHAR);
 624     event.SetId(GetId());
 625     event.m_keyCode = keycode;
 626     event.SetEventObject(this);
 627
 628     // Only if wxTextCtrl::OnChar is called will this be set to True (and
 629     // the character passed through)
 630     cbs->doit = False;
 631
 632     GetEventHandler()->ProcessEvent(event);
 633
 634     if ( !InSetValue() && m_processedDefault )
 635     {
 636         // Can generate a command
 637         wxCommandEvent commandEvent(wxEVT_COMMAND_TEXT_UPDATED, GetId());
 638         commandEvent.SetEventObject(this);
 639         ProcessCommand(commandEvent);
 640     }
 641
 642     // do it after the (user) event handlers processed the events because
 643     // otherwise GetValue() would return incorrect (not yet updated value)
 644     m_tempCallbackStruct = NULL;
 645 }
 646
 647 wxSize wxDoGetSingleTextCtrlBestSize( Widget textWidget,
 648                                       const wxWindow* window )
 649 {
 650     Dimension xmargin, ymargin, highlight, shadow;
 651     char* value;
 652
 653     XtVaGetValues( textWidget,
 654                    XmNmarginWidth, &xmargin,
 655                    XmNmarginHeight, &ymargin,
 656                    XmNvalue, &value,
 657                    XmNhighlightThickness, &highlight,
 658                    XmNshadowThickness, &shadow,
 659                    NULL );
 660
 661     if( !value )
 662         value = wxMOTIF_STR("|");
 663
 664     int x, y;
 665     window->GetTextExtent( value, &x, &y );
 666
 667     if( x < 100 )
 668         x = 100;
 669
 670     return wxSize( x + 2 * xmargin + 2 * highlight + 2 * shadow,
 671                    // MBN: +2 necessary: Lesstif bug or mine?
 672                    y + 2 * ymargin + 2 * highlight + 2 * shadow + 2 );
 673 }
 674
 675 wxSize wxTextCtrl::DoGetBestSize() const
 676 {
 677     if( IsSingleLine() )
 678     {
 679         wxSize best = wxControl::DoGetBestSize();
 680
 681         if( best.x < 110 ) best.x = 110;
 682
 683         return best;
 684     }
 685     else
 686         return wxWindow::DoGetBestSize();
 687 }
 688
 689 // ----------------------------------------------------------------------------
 690 // helpers and Motif callbacks
 691 // ----------------------------------------------------------------------------
 692
 693 static void MergeChangesIntoString(wxString& value,
 694                                    XmTextVerifyCallbackStruct *cbs)
 695 {
 696     /* _sm_
 697      * At least on my system (SunOS 4.1.3 + Motif 1.2), you need to think of
 698      * every event as a replace event.  cbs->text->ptr gives the replacement
 699      * text, cbs->startPos gives the index of the first char affected by the
 700      * replace, and cbs->endPos gives the index one more than the last char
 701      * affected by the replace (startPos == endPos implies an empty range).
 702      * Hence, a deletion is represented by replacing all input text with a
 703      * blank string ("", *not* NULL!).  A simple insertion that does not
 704      * overwrite any text has startPos == endPos.
 705      */
 706
 707     if ( !value )
 708     {
 709         // easy case: the ol value was empty
 710         value = cbs->text->ptr;
 711     }
 712     else
 713     {
 714         // merge the changes into the value
 715         const char * const passwd = value;
 716         int len = value.length();
 717
 718         len += ( cbs->text->ptr ?
 719                  strlen(cbs->text->ptr) :
 720                  0 ) + 1;                      // + new text (if any) + NUL
 721         len -= cbs->endPos - cbs->startPos;    // - text from affected region.
 722
 723         char * newS = new char [len];
 724         char * dest = newS,
 725              * insert = cbs->text->ptr;
 726
 727         // Copy (old) text from passwd, up to the start posn of the change.
 728         int i;
 729         const char * p = passwd;
 730         for (i = 0; i < cbs->startPos; ++i)
 731             *dest++ = *p++;
 732
 733         // Copy the text to be inserted).
 734         if (insert)
 735             while (*insert)
 736                 *dest++ = *insert++;
 737
 738         // Finally, copy into newS any remaining text from passwd[endPos] on.
 739         for (p = passwd + cbs->endPos; *p; )
 740             *dest++ = *p++;
 741         *dest = 0;
 742
 743         value = newS;
 744
 745         delete[] newS;
 746     }
 747 }
 748
 749 static void
 750 wxTextWindowChangedProc (Widget w, XtPointer clientData, XtPointer WXUNUSED(ptr))
 751 {
 752     if (!wxGetWindowFromTable(w))
 753         // Widget has been deleted!
 754         return;
 755
 756     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 757     tw->SetModified(true);
 758 }
 759
 760 static void
 761 wxTextWindowModifyProc (Widget WXUNUSED(w), XtPointer clientData, XmTextVerifyCallbackStruct *cbs)
 762 {
 763     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 764     tw->m_processedDefault = false;
 765
 766     // First, do some stuff if it's a password control: in this case, we need
 767     // to store the string inside the class because GetValue() can't retrieve
 768     // it from the text ctrl. We do *not* do it in other circumstances because
 769     // it would double the amount of memory needed.
 770
 771     if ( tw->GetWindowStyleFlag() & wxTE_PASSWORD )
 772     {
 773         MergeChangesIntoString(tw->m_value, cbs);
 774
 775         if ( cbs->text->length > 0 )
 776         {
 777             int i;
 778             for (i = 0; i < cbs->text->length; ++i)
 779                 cbs->text->ptr[i] = '*';
 780             cbs->text->ptr[i] = '\0';
 781         }
 782     }
 783
 784     if(tw->InSetValue())
 785         return;
 786
 787     // If we're already within an OnChar, return: probably a programmatic
 788     // insertion.
 789     if (tw->m_tempCallbackStruct)
 790         return;
 791
 792     // Check for a backspace
 793     if (cbs->startPos == (cbs->currInsert - 1))
 794     {
 795         tw->DoSendEvents((void *)cbs, WXK_DELETE);
 796
 797         return;
 798     }
 799
 800     // Pasting operation: let it through without calling OnChar
 801     if (cbs->text->length > 1)
 802         return;
 803
 804     // Something other than text
 805     if (cbs->text->ptr == NULL)
 806         return;
 807
 808     // normal key press
 809     char ch = cbs->text->ptr[0];
 810     tw->DoSendEvents((void *)cbs, ch == '\n' ? '\r' : ch);
 811 }
 812
 813 static void
 814 wxTextWindowGainFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 815 {
 816     if (!wxGetWindowFromTable(w))
 817         return;
 818
 819     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 820     wxFocusEvent event(wxEVT_SET_FOCUS, tw->GetId());
 821     event.SetEventObject(tw);
 822     tw->GetEventHandler()->ProcessEvent(event);
 823 }
 824
 825 static void
 826 wxTextWindowLoseFocusProc (Widget w, XtPointer clientData, XmAnyCallbackStruct *WXUNUSED(cbs))
 827 {
 828     if (!wxGetWindowFromTable(w))
 829         return;
 830
 831     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 832     wxFocusEvent event(wxEVT_KILL_FOCUS, tw->GetId());
 833     event.SetEventObject(tw);
 834     tw->GetEventHandler()->ProcessEvent(event);
 835 }
 836
 837 static void wxTextWindowActivateProc(Widget w, XtPointer clientData,
 838                                      XmAnyCallbackStruct *WXUNUSED(ptr))
 839 {
 840     if (!wxGetWindowFromTable(w))
 841         return;
 842
 843     wxTextCtrl *tw = (wxTextCtrl *) clientData;
 844
 845     if (tw->InSetValue())
 846         return;
 847
 848     wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER);
 849     event.SetId(tw->GetId());
 850     event.SetEventObject(tw);
 851     tw->ProcessCommand(event);
 852 }
 853
 854 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
 855 {
 856     Cut();
 857 }
 858
 859 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
 860 {
 861     Copy();
 862 }
 863
 864 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
 865 {
 866     Paste();
 867 }
 868
 869 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
 870 {
 871     Undo();
 872 }
 873
 874 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
 875 {
 876     Redo();
 877 }
 878
 879 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
 880 {
 881     event.Enable( CanCut() );
 882 }
 883
 884 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
 885 {
 886     event.Enable( CanCopy() );
 887 }
 888
 889 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
 890 {
 891     event.Enable( CanPaste() );
 892 }
 893
 894 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
 895 {
 896     event.Enable( CanUndo() );
 897 }
 898
 899 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
 900 {
 901     event.Enable( CanRedo() );
 902 }