src/gtk/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/gtk/textctrl.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling, Vadim Zeitlin, 2005 Mart Raudsepp
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 // For compilers that support precompilation, includes "wx.h".
  11 #include "wx/wxprec.h"
  12
  13 #include "wx/textctrl.h"
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/intl.h"
  17     #include "wx/log.h"
  18     #include "wx/utils.h"
  19     #include "wx/panel.h"
  20     #include "wx/settings.h"
  21     #include "wx/math.h"
  22 #endif
  23
  24 #include "wx/strconv.h"
  25 #include "wx/fontutil.h"        // for wxNativeFontInfo (GetNativeFontInfo())
  26
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29 #include <ctype.h>
  30
  31 #include "wx/gtk/private.h"
  32 #include <gdk/gdkkeysyms.h>
  33
  34 // ----------------------------------------------------------------------------
  35 // helpers
  36 // ----------------------------------------------------------------------------
  37
  38 extern "C" {
  39 static void wxGtkOnRemoveTag(GtkTextBuffer *buffer,
  40                              GtkTextTag *tag,
  41                              GtkTextIter *start,
  42                              GtkTextIter *end,
  43                              char *prefix)
  44 {
  45     gchar *name;
  46     g_object_get (tag, "name", &name, NULL);
  47
  48     if (!name || strncmp(name, prefix, strlen(prefix)))
  49         // anonymous tag or not starting with prefix - don't remove
  50         g_signal_stop_emission_by_name (buffer, "remove_tag");
  51
  52     g_free(name);
  53 }
  54 }
  55
  56 extern "C" {
  57 static void wxGtkTextApplyTagsFromAttr(GtkWidget *text,
  58                                        GtkTextBuffer *text_buffer,
  59                                        const wxTextAttr& attr,
  60                                        GtkTextIter *start,
  61                                        GtkTextIter *end)
  62 {
  63     static gchar buf[1024];
  64     GtkTextTag *tag;
  65
  66     gulong remove_handler_id = g_signal_connect (text_buffer, "remove_tag",
  67             G_CALLBACK (wxGtkOnRemoveTag), gpointer("WX"));
  68     gtk_text_buffer_remove_all_tags(text_buffer, start, end);
  69     g_signal_handler_disconnect (text_buffer, remove_handler_id);
  70
  71     if (attr.HasFont())
  72     {
  73         PangoFontDescription *font_description = attr.GetFont().GetNativeFontInfo()->description;
  74         wxGtkString font_string(pango_font_description_to_string(font_description));
  75         g_snprintf(buf, sizeof(buf), "WXFONT %s", font_string.c_str());
  76         tag = gtk_text_tag_table_lookup( gtk_text_buffer_get_tag_table( text_buffer ),
  77                                          buf );
  78         if (!tag)
  79             tag = gtk_text_buffer_create_tag( text_buffer, buf,
  80                                               "font-desc", font_description,
  81                                               NULL );
  82         gtk_text_buffer_apply_tag (text_buffer, tag, start, end);
  83
  84         if (attr.GetFont().GetUnderlined())
  85         {
  86             g_snprintf(buf, sizeof(buf), "WXFONTUNDERLINE");
  87             tag = gtk_text_tag_table_lookup( gtk_text_buffer_get_tag_table( text_buffer ),
  88                                              buf );
  89             if (!tag)
  90                 tag = gtk_text_buffer_create_tag( text_buffer, buf,
  91                                                   "underline-set", TRUE,
  92                                                   "underline", PANGO_UNDERLINE_SINGLE,
  93                                                   NULL );
  94             gtk_text_buffer_apply_tag (text_buffer, tag, start, end);
  95         }
  96     }
  97
  98     if (attr.HasTextColour())
  99     {
 100         const GdkColor *colFg = attr.GetTextColour().GetColor();
 101         g_snprintf(buf, sizeof(buf), "WXFORECOLOR %d %d %d",
 102                    colFg->red, colFg->green, colFg->blue);
 103         tag = gtk_text_tag_table_lookup( gtk_text_buffer_get_tag_table( text_buffer ),
 104                                          buf );
 105         if (!tag)
 106             tag = gtk_text_buffer_create_tag( text_buffer, buf,
 107                                               "foreground-gdk", colFg, NULL );
 108         gtk_text_buffer_apply_tag (text_buffer, tag, start, end);
 109     }
 110
 111     if (attr.HasBackgroundColour())
 112     {
 113         const GdkColor *colBg = attr.GetBackgroundColour().GetColor();
 114         g_snprintf(buf, sizeof(buf), "WXBACKCOLOR %d %d %d",
 115                    colBg->red, colBg->green, colBg->blue);
 116         tag = gtk_text_tag_table_lookup( gtk_text_buffer_get_tag_table( text_buffer ),
 117                                          buf );
 118         if (!tag)
 119             tag = gtk_text_buffer_create_tag( text_buffer, buf,
 120                                               "background-gdk", colBg, NULL );
 121         gtk_text_buffer_apply_tag (text_buffer, tag, start, end);
 122     }
 123
 124     if (attr.HasAlignment())
 125     {
 126         GtkTextIter para_start, para_end = *end;
 127         gtk_text_buffer_get_iter_at_line( text_buffer,
 128                                           &para_start,
 129                                           gtk_text_iter_get_line(start) );
 130         gtk_text_iter_forward_line(&para_end);
 131
 132         remove_handler_id = g_signal_connect (text_buffer, "remove_tag",
 133                                               G_CALLBACK(wxGtkOnRemoveTag),
 134                                               gpointer("WXALIGNMENT"));
 135         gtk_text_buffer_remove_all_tags( text_buffer, &para_start, &para_end );
 136         g_signal_handler_disconnect (text_buffer, remove_handler_id);
 137
 138         GtkJustification align;
 139         switch (attr.GetAlignment())
 140         {
 141             default:
 142                 align = GTK_JUSTIFY_LEFT;
 143                 break;
 144             case wxTEXT_ALIGNMENT_RIGHT:
 145                 align = GTK_JUSTIFY_RIGHT;
 146                 break;
 147             case wxTEXT_ALIGNMENT_CENTER:
 148                 align = GTK_JUSTIFY_CENTER;
 149                 break;
 150             // gtk+ doesn't support justify as of gtk+-2.7.4
 151         }
 152
 153         g_snprintf(buf, sizeof(buf), "WXALIGNMENT %d", align);
 154         tag = gtk_text_tag_table_lookup( gtk_text_buffer_get_tag_table( text_buffer ),
 155                                          buf );
 156         if (!tag)
 157             tag = gtk_text_buffer_create_tag( text_buffer, buf,
 158                                               "justification", align, NULL );
 159         gtk_text_buffer_apply_tag( text_buffer, tag, &para_start, &para_end );
 160     }
 161
 162     if (attr.HasLeftIndent())
 163     {
 164         // Indentation attribute
 165
 166         // Clear old indentation tags
 167         GtkTextIter para_start, para_end = *end;
 168         gtk_text_buffer_get_iter_at_line( text_buffer,
 169                                           &para_start,
 170                                           gtk_text_iter_get_line(start) );
 171         gtk_text_iter_forward_line(&para_end);
 172
 173         remove_handler_id = g_signal_connect (text_buffer, "remove_tag",
 174                                               G_CALLBACK(wxGtkOnRemoveTag),
 175                                               gpointer("WXINDENT"));
 176         gtk_text_buffer_remove_all_tags( text_buffer, &para_start, &para_end );
 177         g_signal_handler_disconnect (text_buffer, remove_handler_id);
 178
 179         // Convert indent from 1/10th of a mm into pixels
 180         float factor;
 181 #if GTK_CHECK_VERSION(2,2,0)
 182         if (!gtk_check_version(2,2,0))
 183             factor = (float)gdk_screen_get_width(gtk_widget_get_screen(text)) /
 184                       gdk_screen_get_width_mm(gtk_widget_get_screen(text)) / 10;
 185         else
 186 #endif
 187             factor = (float)gdk_screen_width() / gdk_screen_width_mm() / 10;
 188
 189         const int indent = (int)(factor * attr.GetLeftIndent());
 190         const int subIndent = (int)(factor * attr.GetLeftSubIndent());
 191
 192         gint gindent;
 193         gint gsubindent;
 194
 195         if (subIndent >= 0)
 196         {
 197             gindent = indent;
 198             gsubindent = -subIndent;
 199         }
 200         else
 201         {
 202             gindent = -subIndent;
 203             gsubindent = indent;
 204         }
 205
 206         g_snprintf(buf, sizeof(buf), "WXINDENT %d %d", gindent, gsubindent);
 207         tag = gtk_text_tag_table_lookup( gtk_text_buffer_get_tag_table( text_buffer ),
 208                                         buf );
 209         if (!tag)
 210             tag = gtk_text_buffer_create_tag( text_buffer, buf,
 211                                               "left-margin", gindent, "indent", gsubindent, NULL );
 212         gtk_text_buffer_apply_tag (text_buffer, tag, &para_start, &para_end);
 213     }
 214
 215     if (attr.HasTabs())
 216     {
 217         // Set tab stops
 218
 219         // Clear old tabs
 220         GtkTextIter para_start, para_end = *end;
 221         gtk_text_buffer_get_iter_at_line( text_buffer,
 222                                           &para_start,
 223                                           gtk_text_iter_get_line(start) );
 224         gtk_text_iter_forward_line(&para_end);
 225
 226         remove_handler_id = g_signal_connect (text_buffer, "remove_tag",
 227                                               G_CALLBACK(wxGtkOnRemoveTag),
 228                                               gpointer("WXTABS"));
 229         gtk_text_buffer_remove_all_tags( text_buffer, &para_start, &para_end );
 230         g_signal_handler_disconnect (text_buffer, remove_handler_id);
 231
 232         const wxArrayInt& tabs = attr.GetTabs();
 233
 234         wxString tagname = _T("WXTABS");
 235         g_snprintf(buf, sizeof(buf), "WXTABS");
 236         for (size_t i = 0; i < tabs.GetCount(); i++)
 237             tagname += wxString::Format(_T(" %d"), tabs[i]);
 238
 239         const wxWX2MBbuf buf = tagname.mb_str(wxConvUTF8);
 240
 241         tag = gtk_text_tag_table_lookup( gtk_text_buffer_get_tag_table( text_buffer ),
 242                                         buf );
 243         if (!tag)
 244         {
 245             // Factor to convert from 1/10th of a mm into pixels
 246             float factor;
 247 #if GTK_CHECK_VERSION(2,2,0)
 248             if (!gtk_check_version(2,2,0))
 249                 factor = (float)gdk_screen_get_width(gtk_widget_get_screen(text)) /
 250                           gdk_screen_get_width_mm(gtk_widget_get_screen(text)) / 10;
 251             else
 252 #endif
 253                 factor = (float)gdk_screen_width() / gdk_screen_width_mm() / 10;
 254
 255             PangoTabArray* tabArray = pango_tab_array_new(tabs.GetCount(), TRUE);
 256             for (size_t i = 0; i < tabs.GetCount(); i++)
 257                 pango_tab_array_set_tab(tabArray, i, PANGO_TAB_LEFT, (gint)(tabs[i] * factor));
 258             tag = gtk_text_buffer_create_tag( text_buffer, buf,
 259                                               "tabs", tabArray, NULL );
 260             pango_tab_array_free(tabArray);
 261         }
 262         gtk_text_buffer_apply_tag (text_buffer, tag, &para_start, &para_end);
 263     }
 264 }
 265 }
 266
 267 extern "C" {
 268 static void wxGtkTextInsert(GtkWidget *text,
 269                             GtkTextBuffer *text_buffer,
 270                             const wxTextAttr& attr,
 271                             const wxCharBuffer& buffer)
 272
 273 {
 274     gint start_offset;
 275     GtkTextIter iter, start;
 276
 277     gtk_text_buffer_get_iter_at_mark( text_buffer, &iter,
 278                                      gtk_text_buffer_get_insert (text_buffer) );
 279     start_offset = gtk_text_iter_get_offset (&iter);
 280     gtk_text_buffer_insert( text_buffer, &iter, buffer, strlen(buffer) );
 281
 282     gtk_text_buffer_get_iter_at_offset (text_buffer, &start, start_offset);
 283
 284     wxGtkTextApplyTagsFromAttr(text, text_buffer, attr, &start, &iter);
 285 }
 286 }
 287
 288 // ----------------------------------------------------------------------------
 289 // "insert_text" for GtkEntry
 290 // ----------------------------------------------------------------------------
 291
 292 extern "C" {
 293 static void
 294 gtk_insert_text_callback(GtkEditable *editable,
 295                          const gchar *new_text,
 296                          gint new_text_length,
 297                          gint *position,
 298                          wxTextCtrl *win)
 299 {
 300     if (g_isIdle)
 301         wxapp_install_idle_handler();
 302
 303     // we should only be called if we have a max len limit at all
 304     GtkEntry *entry = GTK_ENTRY (editable);
 305
 306     wxCHECK_RET( entry->text_max_length, _T("shouldn't be called") );
 307
 308     // check that we don't overflow the max length limit
 309     //
 310     // FIXME: this doesn't work when we paste a string which is going to be
 311     //        truncated
 312     if ( entry->text_length == entry->text_max_length )
 313     {
 314         // we don't need to run the base class version at all
 315         g_signal_stop_emission_by_name (editable, "insert_text");
 316
 317         // remember that the next changed signal is to be ignored to avoid
 318         // generating a dummy wxEVT_COMMAND_TEXT_UPDATED event
 319         win->IgnoreNextTextUpdate();
 320
 321         // and generate the correct one ourselves
 322         wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, win->GetId());
 323         event.SetEventObject(win);
 324         event.SetString(win->GetValue());
 325         win->GetEventHandler()->ProcessEvent( event );
 326     }
 327 }
 328 }
 329
 330 // Implementation of wxTE_AUTO_URL for wxGTK2 by Mart Raudsepp,
 331
 332 extern "C" {
 333 static void
 334 au_apply_tag_callback(GtkTextBuffer *buffer,
 335                       GtkTextTag *tag,
 336                       GtkTextIter *start,
 337                       GtkTextIter *end,
 338                       gpointer textctrl)
 339 {
 340     if(tag == gtk_text_tag_table_lookup(gtk_text_buffer_get_tag_table(buffer), "wxUrl"))
 341         g_signal_stop_emission_by_name (buffer, "apply_tag");
 342 }
 343 }
 344
 345 //-----------------------------------------------------------------------------
 346 //  GtkTextCharPredicates for gtk_text_iter_*_find_char
 347 //-----------------------------------------------------------------------------
 348
 349 extern "C" {
 350 static gboolean
 351 pred_whitespace (gunichar ch, gpointer user_data)
 352 {
 353     return g_unichar_isspace(ch);
 354 }
 355 }
 356
 357 extern "C" {
 358 static gboolean
 359 pred_non_whitespace (gunichar ch, gpointer user_data)
 360 {
 361     return !g_unichar_isspace(ch);
 362 }
 363 }
 364
 365 extern "C" {
 366 static gboolean
 367 pred_nonpunct (gunichar ch, gpointer user_data)
 368 {
 369     return !g_unichar_ispunct(ch);
 370 }
 371 }
 372
 373 extern "C" {
 374 static gboolean
 375 pred_nonpunct_or_slash (gunichar ch, gpointer user_data)
 376 {
 377     return !g_unichar_ispunct(ch) || ch == '/';
 378 }
 379 }
 380
 381 //-----------------------------------------------------------------------------
 382 //  Check for links between s and e and correct tags as necessary
 383 //-----------------------------------------------------------------------------
 384
 385 // This function should be made match better while being efficient at one point.
 386 // Most probably with a row of regular expressions.
 387 extern "C" {
 388 static void
 389 au_check_word( GtkTextIter *s, GtkTextIter *e )
 390 {
 391     static const char *URIPrefixes[] =
 392     {
 393         "http://",
 394         "ftp://",
 395         "www.",
 396         "ftp.",
 397         "mailto://",
 398         "https://",
 399         "file://",
 400         "nntp://",
 401         "news://",
 402         "telnet://",
 403         "mms://",
 404         "gopher://",
 405         "prospero://",
 406         "wais://",
 407     };
 408
 409     GtkTextIter start = *s, end = *e;
 410     GtkTextBuffer *buffer = gtk_text_iter_get_buffer(s);
 411
 412     // Get our special link tag
 413     GtkTextTag *tag = gtk_text_tag_table_lookup(gtk_text_buffer_get_tag_table(buffer), "wxUrl");
 414
 415     // Get rid of punctuation from beginning and end.
 416     // Might want to move this to au_check_range if an improved link checking doesn't
 417     // use some intelligent punctuation checking itself (beware of undesired iter modifications).
 418     if(g_unichar_ispunct( gtk_text_iter_get_char( &start ) ) )
 419         gtk_text_iter_forward_find_char( &start, pred_nonpunct, NULL, e );
 420
 421     gtk_text_iter_backward_find_char( &end, pred_nonpunct_or_slash, NULL, &start );
 422     gtk_text_iter_forward_char(&end);
 423
 424     gchar* text = gtk_text_iter_get_text( &start, &end );
 425     size_t len = strlen(text), prefix_len;
 426     size_t n;
 427
 428     for( n = 0; n < WXSIZEOF(URIPrefixes); ++n )
 429     {
 430         prefix_len = strlen(URIPrefixes[n]);
 431         if((len > prefix_len) && !strncasecmp(text, URIPrefixes[n], prefix_len))
 432             break;
 433     }
 434
 435     if(n < WXSIZEOF(URIPrefixes))
 436     {
 437         gulong signal_id = g_signal_handler_find (buffer,
 438                                                   (GSignalMatchType) (G_SIGNAL_MATCH_FUNC),
 439                                                   0, 0, NULL,
 440                                                   (gpointer)au_apply_tag_callback, NULL);
 441
 442         g_signal_handler_block (buffer, signal_id);
 443         gtk_text_buffer_apply_tag(buffer, tag, &start, &end);
 444         g_signal_handler_unblock (buffer, signal_id);
 445     }
 446 }
 447 }
 448
 449 extern "C" {
 450 static void
 451 au_check_range(GtkTextIter *s,
 452                GtkTextIter *range_end)
 453 {
 454     GtkTextIter range_start = *s;
 455     GtkTextIter word_end;
 456     GtkTextBuffer *buffer = gtk_text_iter_get_buffer(s);
 457     GtkTextTag *tag = gtk_text_tag_table_lookup(gtk_text_buffer_get_tag_table(buffer), "wxUrl");
 458
 459     gtk_text_buffer_remove_tag(buffer, tag, s, range_end);
 460
 461     if(g_unichar_isspace(gtk_text_iter_get_char(&range_start)))
 462         gtk_text_iter_forward_find_char(&range_start, pred_non_whitespace, NULL, range_end);
 463
 464     while(!gtk_text_iter_equal(&range_start, range_end))
 465     {
 466         word_end = range_start;
 467         gtk_text_iter_forward_find_char(&word_end, pred_whitespace, NULL, range_end);
 468
 469         // Now we should have a word delimited by range_start and word_end, correct link tags
 470         au_check_word(&range_start, &word_end);
 471
 472         range_start = word_end;
 473         gtk_text_iter_forward_find_char(&range_start, pred_non_whitespace, NULL, range_end);
 474     }
 475 }
 476 }
 477
 478 //-----------------------------------------------------------------------------
 479 //  "insert-text" for GtkTextBuffer
 480 //-----------------------------------------------------------------------------
 481
 482 extern "C" {
 483 static void
 484 au_insert_text_callback(GtkTextBuffer *buffer,
 485                         GtkTextIter *end,
 486                         gchar *text,
 487                         gint len,
 488                         wxTextCtrl *win)
 489 {
 490     if (!len || !(win->GetWindowStyleFlag() & wxTE_AUTO_URL) )
 491         return;
 492
 493     GtkTextIter start = *end;
 494     gtk_text_iter_backward_chars(&start, g_utf8_strlen(text, len));
 495
 496     GtkTextIter line_start = start;
 497     GtkTextIter line_end = *end;
 498     GtkTextIter words_start = start;
 499     GtkTextIter words_end = *end;
 500
 501     gtk_text_iter_set_line(&line_start, gtk_text_iter_get_line(&start));
 502     gtk_text_iter_forward_to_line_end(&line_end);
 503     gtk_text_iter_backward_find_char(&words_start, pred_whitespace, NULL, &line_start);
 504     gtk_text_iter_forward_find_char(&words_end, pred_whitespace, NULL, &line_end);
 505
 506     au_check_range(&words_start, &words_end);
 507 }
 508 }
 509
 510 //-----------------------------------------------------------------------------
 511 //  "delete-range" for GtkTextBuffer
 512 //-----------------------------------------------------------------------------
 513
 514 extern "C" {
 515 static void
 516 au_delete_range_callback(GtkTextBuffer *buffer,
 517                          GtkTextIter *start,
 518                          GtkTextIter *end,
 519                          wxTextCtrl *win)
 520 {
 521     if( !(win->GetWindowStyleFlag() & wxTE_AUTO_URL) )
 522         return;
 523
 524     GtkTextIter line_start = *start, line_end = *end;
 525
 526     gtk_text_iter_set_line(&line_start, gtk_text_iter_get_line(start));
 527     gtk_text_iter_forward_to_line_end(&line_end);
 528     gtk_text_iter_backward_find_char(start, pred_whitespace, NULL, &line_start);
 529     gtk_text_iter_forward_find_char(end, pred_whitespace, NULL, &line_end);
 530
 531     au_check_range(start, end);
 532 }
 533 }
 534
 535
 536 //-----------------------------------------------------------------------------
 537 //  "changed"
 538 //-----------------------------------------------------------------------------
 539
 540 extern "C" {
 541 static void
 542 gtk_text_changed_callback( GtkWidget *widget, wxTextCtrl *win )
 543 {
 544     if ( win->IgnoreTextUpdate() )
 545         return;
 546
 547     if (!win->m_hasVMT) return;
 548
 549     if (g_isIdle)
 550         wxapp_install_idle_handler();
 551
 552     if ( win->MarkDirtyOnChange() )
 553         win->MarkDirty();
 554
 555     win->SendTextUpdatedEvent();
 556 }
 557 }
 558
 559 //-----------------------------------------------------------------------------
 560 //  clipboard events: "copy-clipboard", "cut-clipboard", "paste-clipboard"
 561 //-----------------------------------------------------------------------------
 562
 563 // common part of the event handlers below
 564 static void
 565 handle_text_clipboard_callback( GtkWidget *widget, wxTextCtrl *win,
 566                                 wxEventType eventType, const gchar * signal_name)
 567 {
 568     wxClipboardTextEvent event( eventType, win->GetId() );
 569     event.SetEventObject( win );
 570     if ( win->GetEventHandler()->ProcessEvent( event ) )
 571     {
 572         // don't let the default processing to take place if we did something
 573         // ourselves in the event handler
 574         g_signal_stop_emission_by_name (widget, signal_name);
 575     }
 576 }
 577
 578 extern "C" {
 579 static void
 580 gtk_copy_clipboard_callback( GtkWidget *widget, wxTextCtrl *win )
 581 {
 582     handle_text_clipboard_callback(
 583         widget, win, wxEVT_COMMAND_TEXT_COPY, "copy-clipboard" );
 584 }
 585
 586 static void
 587 gtk_cut_clipboard_callback( GtkWidget *widget, wxTextCtrl *win )
 588 {
 589     handle_text_clipboard_callback(
 590         widget, win, wxEVT_COMMAND_TEXT_CUT, "cut-clipboard" );
 591 }
 592
 593 static void
 594 gtk_paste_clipboard_callback( GtkWidget *widget, wxTextCtrl *win )
 595 {
 596     handle_text_clipboard_callback(
 597         widget, win, wxEVT_COMMAND_TEXT_PASTE, "paste-clipboard" );
 598 }
 599 }
 600
 601 //-----------------------------------------------------------------------------
 602 // "expose_event" from scrolled window and textview
 603 //-----------------------------------------------------------------------------
 604
 605 extern "C" {
 606 static gboolean
 607 gtk_text_exposed_callback( GtkWidget *widget, GdkEventExpose *event, wxTextCtrl *win )
 608 {
 609     return TRUE;
 610 }
 611 }
 612
 613
 614 //-----------------------------------------------------------------------------
 615 //  wxTextCtrl
 616 //-----------------------------------------------------------------------------
 617
 618 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxTextCtrlBase)
 619
 620 BEGIN_EVENT_TABLE(wxTextCtrl, wxTextCtrlBase)
 621     EVT_CHAR(wxTextCtrl::OnChar)
 622
 623     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 624     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 625     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 626     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 627     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 628
 629     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 630     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 631     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 632     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 633     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 634
 635     // wxTE_AUTO_URL wxTextUrl support. Currently only creates
 636     // wxTextUrlEvent in the same cases as wxMSW, more can be added here.
 637     EVT_MOTION      (wxTextCtrl::OnUrlMouseEvent)
 638     EVT_LEFT_DOWN   (wxTextCtrl::OnUrlMouseEvent)
 639     EVT_LEFT_UP     (wxTextCtrl::OnUrlMouseEvent)
 640     EVT_LEFT_DCLICK (wxTextCtrl::OnUrlMouseEvent)
 641     EVT_RIGHT_DOWN  (wxTextCtrl::OnUrlMouseEvent)
 642     EVT_RIGHT_UP    (wxTextCtrl::OnUrlMouseEvent)
 643     EVT_RIGHT_DCLICK(wxTextCtrl::OnUrlMouseEvent)
 644 END_EVENT_TABLE()
 645
 646 void wxTextCtrl::Init()
 647 {
 648     m_dontMarkDirty =
 649     m_modified = false;
 650
 651     m_countUpdatesToIgnore = 0;
 652
 653     SetUpdateFont(false);
 654
 655     m_text = NULL;
 656     m_frozenness = 0;
 657     m_gdkHandCursor = NULL;
 658     m_gdkXTermCursor = NULL;
 659 }
 660
 661 wxTextCtrl::~wxTextCtrl()
 662 {
 663     if(m_gdkHandCursor)
 664         gdk_cursor_unref(m_gdkHandCursor);
 665     if(m_gdkXTermCursor)
 666         gdk_cursor_unref(m_gdkXTermCursor);
 667 }
 668
 669 wxTextCtrl::wxTextCtrl( wxWindow *parent,
 670                         wxWindowID id,
 671                         const wxString &value,
 672                         const wxPoint &pos,
 673                         const wxSize &size,
 674                         long style,
 675                         const wxValidator& validator,
 676                         const wxString &name )
 677 {
 678     Init();
 679
 680     Create( parent, id, value, pos, size, style, validator, name );
 681 }
 682
 683 bool wxTextCtrl::Create( wxWindow *parent,
 684                          wxWindowID id,
 685                          const wxString &value,
 686                          const wxPoint &pos,
 687                          const wxSize &size,
 688                          long style,
 689                          const wxValidator& validator,
 690                          const wxString &name )
 691 {
 692     m_needParent = true;
 693     m_acceptsFocus = true;
 694
 695     if (!PreCreation( parent, pos, size ) ||
 696         !CreateBase( parent, id, pos, size, style, validator, name ))
 697     {
 698         wxFAIL_MSG( wxT("wxTextCtrl creation failed") );
 699         return false;
 700     }
 701
 702     bool multi_line = (style & wxTE_MULTILINE) != 0;
 703
 704     if (multi_line)
 705     {
 706         // Create view
 707         m_text = gtk_text_view_new();
 708
 709         m_buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(m_text) );
 710
 711         // create scrolled window
 712         m_widget = gtk_scrolled_window_new( NULL, NULL );
 713         gtk_scrolled_window_set_policy( GTK_SCROLLED_WINDOW( m_widget ),
 714                                         GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC );
 715         // for ScrollLines/Pages
 716         m_scrollBar[1] = (GtkRange*)((GtkScrolledWindow*)m_widget)->vscrollbar;
 717
 718         // Insert view into scrolled window
 719         gtk_container_add( GTK_CONTAINER(m_widget), m_text );
 720
 721         // translate wx wrapping style to GTK+
 722         GtkWrapMode wrap;
 723         if ( HasFlag( wxTE_DONTWRAP ) )
 724             wrap = GTK_WRAP_NONE;
 725         else if ( HasFlag( wxTE_CHARWRAP ) )
 726             wrap = GTK_WRAP_CHAR;
 727         else if ( HasFlag( wxTE_WORDWRAP ) )
 728             wrap = GTK_WRAP_WORD;
 729         else // HasFlag(wxTE_BESTWRAP) always true as wxTE_BESTWRAP == 0
 730         {
 731             // GTK_WRAP_WORD_CHAR seems to be new in GTK+ 2.4
 732 #ifdef __WXGTK24__
 733             if ( !gtk_check_version(2,4,0) )
 734             {
 735                 wrap = GTK_WRAP_WORD_CHAR;
 736             }
 737             else
 738 #endif
 739             wrap = GTK_WRAP_WORD;
 740         }
 741
 742         gtk_text_view_set_wrap_mode( GTK_TEXT_VIEW( m_text ), wrap );
 743
 744         GtkScrolledWindowSetBorder(m_widget, style);
 745
 746         gtk_widget_add_events( GTK_WIDGET(m_text), GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK );
 747
 748         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 749     }
 750     else
 751     {
 752         // a single-line text control: no need for scrollbars
 753         m_widget =
 754         m_text = gtk_entry_new();
 755
 756         if (style & wxNO_BORDER)
 757             g_object_set (m_text, "has-frame", FALSE, NULL);
 758     }
 759
 760     m_parent->DoAddChild( this );
 761
 762     m_focusWidget = m_text;
 763
 764     PostCreation(size);
 765
 766     if (multi_line)
 767     {
 768         gtk_widget_show(m_text);
 769     }
 770
 771     if (!value.empty())
 772     {
 773         SetValue( value );
 774     }
 775
 776     if (style & wxTE_PASSWORD)
 777     {
 778         if (!multi_line)
 779             gtk_entry_set_visibility( GTK_ENTRY(m_text), FALSE );
 780     }
 781
 782     if (style & wxTE_READONLY)
 783     {
 784         if (!multi_line)
 785             gtk_editable_set_editable( GTK_EDITABLE(m_text), FALSE );
 786         else
 787             gtk_text_view_set_editable( GTK_TEXT_VIEW( m_text), FALSE);
 788     }
 789
 790     if (multi_line)
 791     {
 792         if (style & wxTE_RIGHT)
 793             gtk_text_view_set_justification( GTK_TEXT_VIEW(m_text), GTK_JUSTIFY_RIGHT );
 794         else if (style & wxTE_CENTRE)
 795             gtk_text_view_set_justification( GTK_TEXT_VIEW(m_text), GTK_JUSTIFY_CENTER );
 796         // Left justify (alignment) is the default and we don't need to apply GTK_JUSTIFY_LEFT
 797     }
 798     else
 799     {
 800 #ifdef __WXGTK24__
 801         // gtk_entry_set_alignment was introduced in gtk+-2.3.5
 802         if (!gtk_check_version(2,4,0))
 803         {
 804             if (style & wxTE_RIGHT)
 805                 gtk_entry_set_alignment( GTK_ENTRY(m_text), 1.0 );
 806             else if (style & wxTE_CENTRE)
 807                 gtk_entry_set_alignment( GTK_ENTRY(m_text), 0.5 );
 808         }
 809 #endif
 810     }
 811
 812     // We want to be notified about text changes.
 813     if (multi_line)
 814     {
 815         g_signal_connect (m_buffer, "changed",
 816                           G_CALLBACK (gtk_text_changed_callback), this);
 817
 818         // .. and handle URLs on multi-line controls with wxTE_AUTO_URL style
 819         if (style & wxTE_AUTO_URL)
 820         {
 821             GtkTextIter start, end;
 822             m_gdkHandCursor = gdk_cursor_new(GDK_HAND2);
 823             m_gdkXTermCursor = gdk_cursor_new(GDK_XTERM);
 824
 825             // We create our wxUrl tag here for slight efficiency gain - we
 826             // don't have to check for the tag existance in callbacks,
 827             // hereby it's guaranteed to exist.
 828             gtk_text_buffer_create_tag(m_buffer, "wxUrl",
 829                                        "foreground", "blue",
 830                                        "underline", PANGO_UNDERLINE_SINGLE,
 831                                        NULL);
 832
 833             // Check for URLs after each text change
 834             g_signal_connect_after (m_buffer, "insert_text",
 835                                     G_CALLBACK (au_insert_text_callback), this);
 836             g_signal_connect_after (m_buffer, "delete_range",
 837                                     G_CALLBACK (au_delete_range_callback), this);
 838
 839             // Block all wxUrl tag applying unless we do it ourselves, in which case we
 840             // block this callback temporarily. This takes care of gtk+ internal
 841             // gtk_text_buffer_insert_range* calls that would copy our URL tag otherwise,
 842             // which is undesired because only a part of the URL might be copied.
 843             // The insert-text signal emitted inside it will take care of newly formed
 844             // or wholly copied URLs.
 845             g_signal_connect (m_buffer, "apply_tag",
 846                               G_CALLBACK (au_apply_tag_callback), NULL);
 847
 848             // Check for URLs in the initial string passed to Create
 849             gtk_text_buffer_get_start_iter(m_buffer, &start);
 850             gtk_text_buffer_get_end_iter(m_buffer, &end);
 851             au_check_range(&start, &end);
 852         }
 853     }
 854     else
 855     {
 856         g_signal_connect (m_text, "changed",
 857                           G_CALLBACK (gtk_text_changed_callback), this);
 858     }
 859
 860     g_signal_connect (m_text, "copy-clipboard",
 861                       G_CALLBACK (gtk_copy_clipboard_callback), this);
 862     g_signal_connect (m_text, "cut-clipboard",
 863                       G_CALLBACK (gtk_cut_clipboard_callback), this);
 864     g_signal_connect (m_text, "paste-clipboard",
 865                       G_CALLBACK (gtk_paste_clipboard_callback), this);
 866
 867     m_cursor = wxCursor( wxCURSOR_IBEAM );
 868
 869     wxTextAttr attrDef(GetForegroundColour(), GetBackgroundColour(), GetFont());
 870     SetDefaultStyle( attrDef );
 871
 872     return true;
 873 }
 874
 875
 876 void wxTextCtrl::CalculateScrollbar()
 877 {
 878 }
 879
 880 wxString wxTextCtrl::GetValue() const
 881 {
 882     wxCHECK_MSG( m_text != NULL, wxEmptyString, wxT("invalid text ctrl") );
 883
 884     wxString tmp;
 885     if ( IsMultiLine() )
 886     {
 887         GtkTextIter start;
 888         gtk_text_buffer_get_start_iter( m_buffer, &start );
 889         GtkTextIter end;
 890         gtk_text_buffer_get_end_iter( m_buffer, &end );
 891         wxGtkString text(gtk_text_buffer_get_text(m_buffer, &start, &end, true));
 892
 893         const wxWxCharBuffer buf = wxGTK_CONV_BACK(text);
 894         if ( buf )
 895             tmp = buf;
 896     }
 897     else
 898     {
 899         const gchar *text = gtk_entry_get_text( GTK_ENTRY(m_text) );
 900         const wxWxCharBuffer buf = wxGTK_CONV_BACK( text );
 901         if ( buf )
 902             tmp = buf;
 903     }
 904
 905     return tmp;
 906 }
 907
 908 wxFontEncoding wxTextCtrl::GetTextEncoding() const
 909 {
 910     // GTK+ uses UTF-8 internally, we need to convert to it but from which
 911     // encoding?
 912
 913     // first check the default text style (we intentionally don't check the
 914     // style for the current position as it doesn't make sense for SetValue())
 915     const wxTextAttr& style = GetDefaultStyle();
 916     wxFontEncoding enc = style.HasFont() ? style.GetFont().GetEncoding()
 917                                          : wxFONTENCODING_SYSTEM;
 918
 919     // fall back to the controls font if no style
 920     if ( enc == wxFONTENCODING_SYSTEM && m_hasFont )
 921         enc = GetFont().GetEncoding();
 922
 923     return enc;
 924 }
 925
 926 bool wxTextCtrl::IsEmpty() const
 927 {
 928     if ( IsMultiLine() )
 929         return gtk_text_buffer_get_char_count(m_buffer) != 0;
 930
 931     return wxTextCtrlBase::IsEmpty();
 932 }
 933
 934 void wxTextCtrl::DoSetValue( const wxString &value, int flags )
 935 {
 936     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 937
 938     // the control won't be modified any more as we programmatically replace
 939     // all the existing text, so reset the flag and don't set it again (and do
 940     // it now, before the text event handler is ran so that IsModified() called
 941     // from there returns the expected value)
 942     m_modified = false;
 943     DontMarkDirtyOnNextChange();
 944
 945     const wxCharBuffer buffer(wxGTK_CONV_ENC(value, GetTextEncoding()));
 946     if ( !buffer )
 947     {
 948         // see comment in WriteText() as to why we must warn the user about
 949         // this
 950         wxLogWarning(_("Failed to set text in the text control."));
 951         return;
 952     }
 953
 954     // if the control is not empty, two "changed" signals are emitted,
 955     // otherwise only one and we need to ignore either both or one of them
 956     int ignore = flags & SetValue_SendEvent ? 0 : 1;
 957     if ( !IsEmpty() )
 958         ignore++;
 959
 960     if ( ignore )
 961         IgnoreNextTextUpdate(ignore);
 962
 963     if ( IsMultiLine() )
 964     {
 965         gtk_text_buffer_set_text( m_buffer, buffer, strlen(buffer) );
 966     }
 967     else // single line
 968     {
 969         gtk_entry_set_text( GTK_ENTRY(m_text), buffer );
 970     }
 971
 972     // GRG, Jun/2000: Changed this after a lot of discussion in
 973     //   the lists. wxWidgets 2.2 will have a set of flags to
 974     //   customize this behaviour.
 975     SetInsertionPoint(0);
 976 }
 977
 978 void wxTextCtrl::WriteText( const wxString &text )
 979 {
 980     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 981
 982     if ( text.empty() )
 983         return;
 984
 985     // check if we have a specific style for the current position
 986     wxFontEncoding enc = wxFONTENCODING_SYSTEM;
 987     wxTextAttr style;
 988     if ( GetStyle(GetInsertionPoint(), style) && style.HasFont() )
 989     {
 990         enc = style.GetFont().GetEncoding();
 991     }
 992
 993     if ( enc == wxFONTENCODING_SYSTEM )
 994         enc = GetTextEncoding();
 995
 996     const wxCharBuffer buffer(wxGTK_CONV_ENC(text, enc));
 997     if ( !buffer )
 998     {
 999         // we must log an error here as losing the text like this can be a
1000         // serious problem (e.g. imagine the document edited by user being
1001         // empty instead of containing the correct text)
1002         wxLogWarning(_("Failed to insert text in the control."));
1003         return;
1004     }
1005
1006     // we're changing the text programmatically
1007     DontMarkDirtyOnNextChange();
1008
1009     if ( IsMultiLine() )
1010     {
1011         // First remove the selection if there is one
1012         // TODO:  Is there an easier GTK specific way to do this?
1013         long from, to;
1014         GetSelection(&from, &to);
1015         if (from != to)
1016             Remove(from, to);
1017
1018         // Insert the text
1019         wxGtkTextInsert( m_text, m_buffer, m_defaultStyle, buffer );
1020
1021         GtkAdjustment *adj = gtk_scrolled_window_get_vadjustment( GTK_SCROLLED_WINDOW(m_widget) );
1022         // Scroll to cursor, but only if scrollbar thumb is at the very bottom
1023         if ( wxIsSameDouble(adj->value, adj->upper - adj->page_size) )
1024         {
1025             gtk_text_view_scroll_to_mark( GTK_TEXT_VIEW(m_text),
1026                     gtk_text_buffer_get_insert( m_buffer ), 0.0, FALSE, 0.0, 1.0 );
1027         }
1028     }
1029     else // single line
1030     {
1031         // First remove the selection if there is one
1032         gtk_editable_delete_selection( GTK_EDITABLE(m_text) );
1033
1034         // This moves the cursor pos to behind the inserted text.
1035         gint len = gtk_editable_get_position(GTK_EDITABLE(m_text));
1036
1037         gtk_editable_insert_text( GTK_EDITABLE(m_text), buffer, strlen(buffer), &len );
1038
1039         // Bring entry's cursor uptodate.
1040         gtk_editable_set_position( GTK_EDITABLE(m_text), len );
1041     }
1042 }
1043
1044 void wxTextCtrl::AppendText( const wxString &text )
1045 {
1046     SetInsertionPointEnd();
1047     WriteText( text );
1048 }
1049
1050 wxString wxTextCtrl::GetLineText( long lineNo ) const
1051 {
1052     wxString result;
1053     if ( IsMultiLine() )
1054     {
1055         GtkTextIter line;
1056         gtk_text_buffer_get_iter_at_line(m_buffer,&line,lineNo);
1057         GtkTextIter end = line;
1058         gtk_text_iter_forward_to_line_end(&end);
1059         wxGtkString text(gtk_text_buffer_get_text(m_buffer, &line, &end, true));
1060         result = wxGTK_CONV_BACK(text);
1061     }
1062     else
1063     {
1064         if (lineNo == 0)
1065             result = GetValue();
1066     }
1067     return result;
1068 }
1069
1070 void wxTextCtrl::OnDropFiles( wxDropFilesEvent &WXUNUSED(event) )
1071 {
1072   /* If you implement this, don't forget to update the documentation!
1073    * (file docs/latex/wx/text.tex) */
1074     wxFAIL_MSG( wxT("wxTextCtrl::OnDropFiles not implemented") );
1075 }
1076
1077 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y ) const
1078 {
1079     if ( IsMultiLine() )
1080     {
1081         GtkTextIter iter;
1082
1083         if (pos > GetLastPosition())
1084             return false;
1085
1086         gtk_text_buffer_get_iter_at_offset(m_buffer, &iter, pos);
1087
1088         if ( y )
1089             *y = gtk_text_iter_get_line(&iter);
1090         if ( x )
1091             *x = gtk_text_iter_get_line_offset(&iter);
1092     }
1093     else // single line control
1094     {
1095         if ( pos <= GTK_ENTRY(m_text)->text_length )
1096         {
1097             if ( y )
1098                 *y = 0;
1099             if ( x )
1100                 *x = pos;
1101         }
1102         else
1103         {
1104             // index out of bounds
1105             return false;
1106         }
1107     }
1108
1109     return true;
1110 }
1111
1112 long wxTextCtrl::XYToPosition(long x, long y ) const
1113 {
1114     if ( IsSingleLine() )
1115         return 0;
1116
1117     GtkTextIter iter;
1118     if (y >= gtk_text_buffer_get_line_count (m_buffer))
1119         return -1;
1120
1121     gtk_text_buffer_get_iter_at_line(m_buffer, &iter, y);
1122     if (x >= gtk_text_iter_get_chars_in_line (&iter))
1123         return -1;
1124
1125     return gtk_text_iter_get_offset(&iter) + x;
1126 }
1127
1128 int wxTextCtrl::GetLineLength(long lineNo) const
1129 {
1130     if ( IsMultiLine() )
1131     {
1132         int last_line = gtk_text_buffer_get_line_count( m_buffer ) - 1;
1133         if (lineNo > last_line)
1134             return -1;
1135
1136         GtkTextIter iter;
1137         gtk_text_buffer_get_iter_at_line(m_buffer, &iter, lineNo);
1138         // get_chars_in_line return includes paragraph delimiters, so need to subtract 1 IF it is not the last line
1139         return gtk_text_iter_get_chars_in_line(&iter) - ((lineNo == last_line) ? 0 : 1);
1140     }
1141     else
1142     {
1143         wxString str = GetLineText (lineNo);
1144         return (int) str.length();
1145     }
1146 }
1147
1148 int wxTextCtrl::GetNumberOfLines() const
1149 {
1150     if ( IsMultiLine() )
1151     {
1152         GtkTextIter iter;
1153         gtk_text_buffer_get_iter_at_offset( m_buffer, &iter, 0 );
1154
1155         // move forward by one display line until the end is reached
1156         int lineCount = 1;
1157         while ( gtk_text_view_forward_display_line(GTK_TEXT_VIEW(m_text), &iter) )
1158         {
1159             lineCount++;
1160         }
1161
1162         // If the last character in the text buffer is a newline,
1163         // gtk_text_view_forward_display_line() will return false without that
1164         // line being counted. Must add one manually in that case.
1165         GtkTextIter lastCharIter;
1166         gtk_text_buffer_get_iter_at_offset
1167         (
1168             m_buffer,
1169             &lastCharIter,
1170             gtk_text_buffer_get_char_count(m_buffer) - 1
1171         );
1172         gchar lastChar = gtk_text_iter_get_char( &lastCharIter );
1173         if ( lastChar == wxT('\n') )
1174             lineCount++;
1175
1176         return lineCount;
1177     }
1178     else // single line
1179     {
1180         return 1;
1181     }
1182 }
1183
1184 void wxTextCtrl::SetInsertionPoint( long pos )
1185 {
1186     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1187
1188     if ( IsMultiLine() )
1189     {
1190         GtkTextIter iter;
1191         gtk_text_buffer_get_iter_at_offset( m_buffer, &iter, pos );
1192         gtk_text_buffer_place_cursor( m_buffer, &iter );
1193         gtk_text_view_scroll_mark_onscreen
1194         (
1195             GTK_TEXT_VIEW(m_text),
1196             gtk_text_buffer_get_insert( m_buffer )
1197         );
1198     }
1199     else
1200     {
1201         // FIXME: Is the editable's cursor really uptodate without double set_position in GTK2?
1202         gtk_editable_set_position(GTK_EDITABLE(m_text), int(pos));
1203     }
1204 }
1205
1206 void wxTextCtrl::SetInsertionPointEnd()
1207 {
1208     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1209
1210     if ( IsMultiLine() )
1211     {
1212         GtkTextIter end;
1213         gtk_text_buffer_get_end_iter( m_buffer, &end );
1214         gtk_text_buffer_place_cursor( m_buffer, &end );
1215     }
1216     else
1217     {
1218         gtk_editable_set_position( GTK_EDITABLE(m_text), -1 );
1219     }
1220 }
1221
1222 void wxTextCtrl::SetEditable( bool editable )
1223 {
1224     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1225
1226     if ( IsMultiLine() )
1227     {
1228         gtk_text_view_set_editable( GTK_TEXT_VIEW(m_text), editable );
1229     }
1230     else
1231     {
1232         gtk_editable_set_editable( GTK_EDITABLE(m_text), editable );
1233     }
1234 }
1235
1236 bool wxTextCtrl::Enable( bool enable )
1237 {
1238     if (!wxWindowBase::Enable(enable))
1239     {
1240         // nothing to do
1241         return false;
1242     }
1243
1244     if ( IsMultiLine() )
1245     {
1246         SetEditable( enable );
1247     }
1248     else
1249     {
1250         gtk_widget_set_sensitive( m_text, enable );
1251     }
1252
1253     return true;
1254 }
1255
1256 // wxGTK-specific: called recursively by Enable,
1257 // to give widgets an oppprtunity to correct their colours after they
1258 // have been changed by Enable
1259 void wxTextCtrl::OnParentEnable( bool enable )
1260 {
1261     // If we have a custom background colour, we use this colour in both
1262     // disabled and enabled mode, or we end up with a different colour under the
1263     // text.
1264     wxColour oldColour = GetBackgroundColour();
1265     if (oldColour.Ok())
1266     {
1267         // Need to set twice or it'll optimize the useful stuff out
1268         if (oldColour == * wxWHITE)
1269             SetBackgroundColour(*wxBLACK);
1270         else
1271             SetBackgroundColour(*wxWHITE);
1272         SetBackgroundColour(oldColour);
1273     }
1274 }
1275
1276 void wxTextCtrl::MarkDirty()
1277 {
1278     m_modified = true;
1279 }
1280
1281 void wxTextCtrl::DiscardEdits()
1282 {
1283     m_modified = false;
1284 }
1285
1286 // ----------------------------------------------------------------------------
1287 // max text length support
1288 // ----------------------------------------------------------------------------
1289
1290 bool wxTextCtrl::IgnoreTextUpdate()
1291 {
1292     if ( m_countUpdatesToIgnore > 0 )
1293     {
1294         m_countUpdatesToIgnore--;
1295
1296         return true;
1297     }
1298
1299     return false;
1300 }
1301
1302 bool wxTextCtrl::MarkDirtyOnChange()
1303 {
1304     if ( m_dontMarkDirty )
1305     {
1306         m_dontMarkDirty = false;
1307
1308         return false;
1309     }
1310
1311     return true;
1312 }
1313
1314 void wxTextCtrl::SetMaxLength(unsigned long len)
1315 {
1316     if ( !HasFlag(wxTE_MULTILINE) )
1317     {
1318         gtk_entry_set_max_length(GTK_ENTRY(m_text), len);
1319
1320         // there is a bug in GTK+ 1.2.x: "changed" signal is emitted even if
1321         // we had tried to enter more text than allowed by max text length and
1322         // the text wasn't really changed
1323         //
1324         // to detect this and generate TEXT_MAXLEN event instead of
1325         // TEXT_CHANGED one in this case we also catch "insert_text" signal
1326         //
1327         // when max len is set to 0 we disconnect our handler as it means that
1328         // we shouldn't check anything any more
1329         if ( len )
1330         {
1331             g_signal_connect (m_text, "insert_text",
1332                               G_CALLBACK (gtk_insert_text_callback), this);
1333         }
1334         else // no checking
1335         {
1336             g_signal_handlers_disconnect_by_func (m_text,
1337                     (gpointer) gtk_insert_text_callback, this);
1338         }
1339     }
1340 }
1341
1342 void wxTextCtrl::SetSelection( long from, long to )
1343 {
1344     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1345
1346     if (from == -1 && to == -1)
1347     {
1348         from = 0;
1349         to = GetValue().length();
1350     }
1351
1352     if ( IsMultiLine() )
1353     {
1354         GtkTextIter fromi, toi;
1355         gtk_text_buffer_get_iter_at_offset( m_buffer, &fromi, from );
1356         gtk_text_buffer_get_iter_at_offset( m_buffer, &toi, to );
1357
1358         gtk_text_buffer_place_cursor( m_buffer, &toi );
1359         gtk_text_buffer_move_mark_by_name( m_buffer, "selection_bound", &fromi );
1360     }
1361     else
1362     {
1363         gtk_editable_select_region( GTK_EDITABLE(m_text), (gint)from, (gint)to );
1364     }
1365 }
1366
1367 void wxTextCtrl::ShowPosition( long pos )
1368 {
1369     if ( IsMultiLine() )
1370     {
1371         GtkTextIter iter;
1372         gtk_text_buffer_get_start_iter( m_buffer, &iter );
1373         gtk_text_iter_set_offset( &iter, pos );
1374         GtkTextMark *mark = gtk_text_buffer_create_mark( m_buffer, NULL, &iter, TRUE );
1375         gtk_text_view_scroll_to_mark( GTK_TEXT_VIEW(m_text), mark, 0.0, FALSE, 0.0, 0.0 );
1376     }
1377 }
1378
1379 wxTextCtrlHitTestResult
1380 wxTextCtrl::HitTest(const wxPoint& pt, long *pos) const
1381 {
1382     if ( !IsMultiLine() )
1383     {
1384         // not supported
1385         return wxTE_HT_UNKNOWN;
1386     }
1387
1388     int x, y;
1389     gtk_text_view_window_to_buffer_coords
1390     (
1391         GTK_TEXT_VIEW(m_text),
1392         GTK_TEXT_WINDOW_TEXT,
1393         pt.x, pt.y,
1394         &x, &y
1395     );
1396
1397     GtkTextIter iter;
1398     gtk_text_view_get_iter_at_location(GTK_TEXT_VIEW(m_text), &iter, x, y);
1399     if ( pos )
1400         *pos = gtk_text_iter_get_offset(&iter);
1401
1402     return wxTE_HT_ON_TEXT;
1403 }
1404
1405 long wxTextCtrl::GetInsertionPoint() const
1406 {
1407     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
1408
1409     if ( IsMultiLine() )
1410     {
1411         // There is no direct accessor for the cursor, but
1412         // internally, the cursor is the "mark" called
1413         // "insert" in the text view's btree structure.
1414
1415         GtkTextMark *mark = gtk_text_buffer_get_insert( m_buffer );
1416         GtkTextIter cursor;
1417         gtk_text_buffer_get_iter_at_mark( m_buffer, &cursor, mark );
1418
1419         return gtk_text_iter_get_offset( &cursor );
1420     }
1421     else
1422     {
1423         return (long) gtk_editable_get_position(GTK_EDITABLE(m_text));
1424     }
1425 }
1426
1427 wxTextPos wxTextCtrl::GetLastPosition() const
1428 {
1429     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
1430
1431     int pos = 0;
1432
1433     if ( IsMultiLine() )
1434     {
1435         GtkTextIter end;
1436         gtk_text_buffer_get_end_iter( m_buffer, &end );
1437
1438         pos = gtk_text_iter_get_offset( &end );
1439     }
1440     else
1441     {
1442         pos = GTK_ENTRY(m_text)->text_length;
1443     }
1444
1445     return (long)pos;
1446 }
1447
1448 void wxTextCtrl::Remove( long from, long to )
1449 {
1450     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1451
1452     if ( IsMultiLine() )
1453     {
1454         GtkTextIter fromi, toi;
1455         gtk_text_buffer_get_iter_at_offset( m_buffer, &fromi, from );
1456         gtk_text_buffer_get_iter_at_offset( m_buffer, &toi, to );
1457
1458         gtk_text_buffer_delete( m_buffer, &fromi, &toi );
1459     }
1460     else // single line
1461         gtk_editable_delete_text( GTK_EDITABLE(m_text), (gint)from, (gint)to );
1462 }
1463
1464 void wxTextCtrl::Replace( long from, long to, const wxString &value )
1465 {
1466     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1467
1468     Remove( from, to );
1469
1470     if (!value.empty())
1471     {
1472         SetInsertionPoint( from );
1473         WriteText( value );
1474     }
1475 }
1476
1477 void wxTextCtrl::Cut()
1478 {
1479     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1480
1481     if ( IsMultiLine() )
1482         g_signal_emit_by_name (m_text, "cut-clipboard");
1483     else
1484         gtk_editable_cut_clipboard(GTK_EDITABLE(m_text));
1485 }
1486
1487 void wxTextCtrl::Copy()
1488 {
1489     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1490
1491     if ( IsMultiLine() )
1492         g_signal_emit_by_name (m_text, "copy-clipboard");
1493     else
1494         gtk_editable_copy_clipboard(GTK_EDITABLE(m_text));
1495 }
1496
1497 void wxTextCtrl::Paste()
1498 {
1499     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1500
1501     if ( IsMultiLine() )
1502         g_signal_emit_by_name (m_text, "paste-clipboard");
1503     else
1504         gtk_editable_paste_clipboard(GTK_EDITABLE(m_text));
1505 }
1506
1507 // Undo/redo
1508 void wxTextCtrl::Undo()
1509 {
1510     // TODO
1511     wxFAIL_MSG( wxT("wxTextCtrl::Undo not implemented") );
1512 }
1513
1514 void wxTextCtrl::Redo()
1515 {
1516     // TODO
1517     wxFAIL_MSG( wxT("wxTextCtrl::Redo not implemented") );
1518 }
1519
1520 bool wxTextCtrl::CanUndo() const
1521 {
1522     // TODO
1523     //wxFAIL_MSG( wxT("wxTextCtrl::CanUndo not implemented") );
1524     return false;
1525 }
1526
1527 bool wxTextCtrl::CanRedo() const
1528 {
1529     // TODO
1530     //wxFAIL_MSG( wxT("wxTextCtrl::CanRedo not implemented") );
1531     return false;
1532 }
1533
1534 // If the return values from and to are the same, there is no
1535 // selection.
1536 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
1537 {
1538     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1539
1540     gint from = -1;
1541     gint to = -1;
1542     bool haveSelection = false;
1543
1544      if ( IsMultiLine() )
1545      {
1546          GtkTextIter ifrom, ito;
1547          if ( gtk_text_buffer_get_selection_bounds(m_buffer, &ifrom, &ito) )
1548          {
1549              haveSelection = true;
1550              from = gtk_text_iter_get_offset(&ifrom);
1551              to = gtk_text_iter_get_offset(&ito);
1552          }
1553      }
1554      else  // not multi-line
1555      {
1556          if ( gtk_editable_get_selection_bounds( GTK_EDITABLE(m_text),
1557                                                  &from, &to) )
1558          {
1559              haveSelection = true;
1560          }
1561      }
1562
1563      if (! haveSelection )
1564           from = to = GetInsertionPoint();
1565
1566      if ( from > to )
1567      {
1568          // exchange them to be compatible with wxMSW
1569          gint tmp = from;
1570          from = to;
1571          to = tmp;
1572      }
1573
1574     if ( fromOut )
1575         *fromOut = from;
1576     if ( toOut )
1577         *toOut = to;
1578 }
1579
1580
1581 bool wxTextCtrl::IsEditable() const
1582 {
1583     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1584
1585     if ( IsMultiLine() )
1586     {
1587         return gtk_text_view_get_editable(GTK_TEXT_VIEW(m_text));
1588     }
1589     else
1590     {
1591         return gtk_editable_get_editable(GTK_EDITABLE(m_text));
1592     }
1593 }
1594
1595 bool wxTextCtrl::IsModified() const
1596 {
1597     return m_modified;
1598 }
1599
1600 void wxTextCtrl::Clear()
1601 {
1602     SetValue( wxEmptyString );
1603 }
1604
1605 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
1606 {
1607     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1608
1609     if ( key_event.GetKeyCode() == WXK_RETURN )
1610     {
1611         if ( HasFlag(wxTE_PROCESS_ENTER) )
1612         {
1613             wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1614             event.SetEventObject(this);
1615             event.SetString(GetValue());
1616             if ( GetEventHandler()->ProcessEvent(event) )
1617                 return;
1618         }
1619
1620         // FIXME: this is not the right place to do it, wxDialog::OnCharHook()
1621         //        probably is
1622         if ( IsSingleLine() )
1623         {
1624             // This will invoke the dialog default action, such
1625             // as the clicking the default button.
1626
1627             wxWindow *top_frame = m_parent;
1628             while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
1629                 top_frame = top_frame->GetParent();
1630
1631             if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
1632             {
1633                 GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
1634
1635                 if (window->default_widget)
1636                 {
1637                     gtk_widget_activate (window->default_widget);
1638                     return;
1639                 }
1640             }
1641         }
1642     }
1643
1644     key_event.Skip();
1645 }
1646
1647 GtkWidget* wxTextCtrl::GetConnectWidget()
1648 {
1649     return GTK_WIDGET(m_text);
1650 }
1651
1652 GdkWindow *wxTextCtrl::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
1653 {
1654     if ( IsMultiLine() )
1655     {
1656         return gtk_text_view_get_window(GTK_TEXT_VIEW(m_text),
1657                                         GTK_TEXT_WINDOW_TEXT );
1658     }
1659     else
1660     {
1661         return GTK_ENTRY(m_text)->text_area;
1662     }
1663 }
1664
1665 // the font will change for subsequent text insertiongs
1666 bool wxTextCtrl::SetFont( const wxFont &font )
1667 {
1668     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1669
1670     if ( !wxTextCtrlBase::SetFont(font) )
1671     {
1672         // font didn't change, nothing to do
1673         return false;
1674     }
1675
1676     if ( IsMultiLine() )
1677     {
1678         SetUpdateFont(true);
1679
1680         m_defaultStyle.SetFont(font);
1681
1682         ChangeFontGlobally();
1683     }
1684
1685     return true;
1686 }
1687
1688 void wxTextCtrl::ChangeFontGlobally()
1689 {
1690     // this method is very inefficient and hence should be called as rarely as
1691     // possible!
1692     //
1693     // TODO: it can be implemented much more efficiently for GTK2
1694     wxASSERT_MSG( IsMultiLine(),
1695                   _T("shouldn't be called for single line controls") );
1696
1697     wxString value = GetValue();
1698     if ( !value.empty() )
1699     {
1700         SetUpdateFont(false);
1701
1702         Clear();
1703         AppendText(value);
1704     }
1705 }
1706
1707 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1708 {
1709     if ( !wxControl::SetForegroundColour(colour) )
1710         return false;
1711
1712     // update default fg colour too
1713     m_defaultStyle.SetTextColour(colour);
1714
1715     return true;
1716 }
1717
1718 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1719 {
1720     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1721
1722     if ( !wxControl::SetBackgroundColour( colour ) )
1723         return false;
1724
1725     if (!m_backgroundColour.Ok())
1726         return false;
1727
1728     // change active background color too
1729     m_defaultStyle.SetBackgroundColour( colour );
1730
1731     return true;
1732 }
1733
1734 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr& style )
1735 {
1736     if ( IsMultiLine() )
1737     {
1738         if ( style.IsDefault() )
1739         {
1740             // nothing to do
1741             return true;
1742         }
1743
1744         gint l = gtk_text_buffer_get_char_count( m_buffer );
1745
1746         wxCHECK_MSG( start >= 0 && end <= l, false,
1747                      _T("invalid range in wxTextCtrl::SetStyle") );
1748
1749         GtkTextIter starti, endi;
1750         gtk_text_buffer_get_iter_at_offset( m_buffer, &starti, start );
1751         gtk_text_buffer_get_iter_at_offset( m_buffer, &endi, end );
1752
1753         // use the attributes from style which are set in it and fall back
1754         // first to the default style and then to the text control default
1755         // colours for the others
1756         wxTextAttr attr = wxTextAttr::Combine(style, m_defaultStyle, this);
1757
1758         wxGtkTextApplyTagsFromAttr( m_widget, m_buffer, attr, &starti, &endi );
1759
1760         return true;
1761     }
1762
1763     // else single line
1764     // cannot do this for GTK+'s Entry widget
1765     return false;
1766 }
1767
1768 void wxTextCtrl::DoApplyWidgetStyle(GtkRcStyle *style)
1769 {
1770     gtk_widget_modify_style(m_text, style);
1771 }
1772
1773 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1774 {
1775     Cut();
1776 }
1777
1778 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1779 {
1780     Copy();
1781 }
1782
1783 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1784 {
1785     Paste();
1786 }
1787
1788 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1789 {
1790     Undo();
1791 }
1792
1793 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1794 {
1795     Redo();
1796 }
1797
1798 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1799 {
1800     event.Enable( CanCut() );
1801 }
1802
1803 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1804 {
1805     event.Enable( CanCopy() );
1806 }
1807
1808 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1809 {
1810     event.Enable( CanPaste() );
1811 }
1812
1813 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1814 {
1815     event.Enable( CanUndo() );
1816 }
1817
1818 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1819 {
1820     event.Enable( CanRedo() );
1821 }
1822
1823 wxSize wxTextCtrl::DoGetBestSize() const
1824 {
1825     // FIXME should be different for multi-line controls...
1826     wxSize ret( wxControl::DoGetBestSize() );
1827     wxSize best(80, ret.y);
1828     CacheBestSize(best);
1829     return best;
1830 }
1831
1832 // ----------------------------------------------------------------------------
1833 // freeze/thaw
1834 // ----------------------------------------------------------------------------
1835
1836 void wxTextCtrl::Freeze()
1837 {
1838     if ( HasFlag(wxTE_MULTILINE) )
1839     {
1840         if ( !m_frozenness++ )
1841         {
1842             // freeze textview updates and remove buffer
1843             g_signal_connect (m_text, "expose_event",
1844                               G_CALLBACK (gtk_text_exposed_callback), this);
1845             g_signal_connect (m_widget, "expose_event",
1846                               G_CALLBACK (gtk_text_exposed_callback), this);
1847             gtk_widget_set_sensitive(m_widget, false);
1848             g_object_ref(m_buffer);
1849             gtk_text_view_set_buffer(GTK_TEXT_VIEW(m_text), gtk_text_buffer_new(NULL));
1850         }
1851     }
1852 }
1853
1854 void wxTextCtrl::Thaw()
1855 {
1856     if ( HasFlag(wxTE_MULTILINE) )
1857     {
1858         wxASSERT_MSG( m_frozenness > 0, _T("Thaw() without matching Freeze()") );
1859
1860         if ( !--m_frozenness )
1861         {
1862             // Reattach buffer and thaw textview updates
1863             gtk_text_view_set_buffer(GTK_TEXT_VIEW(m_text), m_buffer);
1864             g_object_unref(m_buffer);
1865             gtk_widget_set_sensitive(m_widget, true);
1866             g_signal_handlers_disconnect_by_func (m_widget,
1867                     (gpointer) gtk_text_exposed_callback, this);
1868             g_signal_handlers_disconnect_by_func (m_text,
1869                     (gpointer) gtk_text_exposed_callback, this);
1870         }
1871     }
1872 }
1873
1874 // ----------------------------------------------------------------------------
1875 // wxTextUrlEvent passing if style & wxTE_AUTO_URL
1876 // ----------------------------------------------------------------------------
1877
1878 // FIXME: when dragging on a link the sample gets an "Unknown event".
1879 // This might be an excessive event from us or a buggy wxMouseEvent::Moving() or
1880 // a buggy sample, or something else
1881 void wxTextCtrl::OnUrlMouseEvent(wxMouseEvent& event)
1882 {
1883     event.Skip();
1884     if( !HasFlag(wxTE_AUTO_URL) )
1885         return;
1886
1887     gint x, y;
1888     GtkTextIter start, end;
1889     GtkTextTag *tag = gtk_text_tag_table_lookup(gtk_text_buffer_get_tag_table(m_buffer),
1890                                                 "wxUrl");
1891
1892     gtk_text_view_window_to_buffer_coords(GTK_TEXT_VIEW(m_text), GTK_TEXT_WINDOW_WIDGET,
1893                                           event.GetX(), event.GetY(), &x, &y);
1894
1895     gtk_text_view_get_iter_at_location(GTK_TEXT_VIEW(m_text), &end, x, y);
1896     if (!gtk_text_iter_has_tag(&end, tag))
1897     {
1898         gdk_window_set_cursor(gtk_text_view_get_window(GTK_TEXT_VIEW(m_text),
1899                               GTK_TEXT_WINDOW_TEXT), m_gdkXTermCursor);
1900         return;
1901     }
1902
1903     gdk_window_set_cursor(gtk_text_view_get_window(GTK_TEXT_VIEW(m_text),
1904                           GTK_TEXT_WINDOW_TEXT), m_gdkHandCursor);
1905
1906     start = end;
1907     if(!gtk_text_iter_begins_tag(&start, tag))
1908         gtk_text_iter_backward_to_tag_toggle(&start, tag);
1909     if(!gtk_text_iter_ends_tag(&end, tag))
1910         gtk_text_iter_forward_to_tag_toggle(&end, tag);
1911
1912     // Native context menu is probably not desired on an URL.
1913     // Consider making this dependant on ProcessEvent(wxTextUrlEvent) return value
1914     if(event.GetEventType() == wxEVT_RIGHT_DOWN)
1915         event.Skip(false);
1916
1917     wxTextUrlEvent url_event(m_windowId, event,
1918                              gtk_text_iter_get_offset(&start),
1919                              gtk_text_iter_get_offset(&end));
1920
1921     InitCommandEvent(url_event);
1922     // Is that a good idea? Seems not (pleasure with gtk_text_view_start_selection_drag)
1923     //event.Skip(!GetEventHandler()->ProcessEvent(url_event));
1924     GetEventHandler()->ProcessEvent(url_event);
1925 }
1926
1927 bool wxTextCtrl::GTKProcessEvent(wxEvent& event) const
1928 {
1929     bool rc = wxTextCtrlBase::GTKProcessEvent(event);
1930
1931     // GtkTextView starts a drag operation when left mouse button is pressed
1932     // and ends it when it is released and if it doesn't get the release event
1933     // the next click on a control results in an assertion failure inside
1934     // gtk_text_view_start_selection_drag() which simply *kills* the program
1935     // without anything we can do about it, so always let GTK+ have this event
1936     return rc && (IsSingleLine() || event.GetEventType() != wxEVT_LEFT_UP);
1937 }
1938
1939 // static
1940 wxVisualAttributes
1941 wxTextCtrl::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1942 {
1943     return GetDefaultAttributesFromGTKWidget(gtk_entry_new, true);
1944 }