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 #if wxUSE_TEXTCTRL
  14
  15 #include "wx/textctrl.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/intl.h"
  19     #include "wx/log.h"
  20     #include "wx/utils.h"
  21     #include "wx/settings.h"
  22     #include "wx/math.h"
  23 #endif
  24
  25 #include "wx/strconv.h"
  26 #include "wx/fontutil.h"        // for wxNativeFontInfo (GetNativeFontInfo())
  27
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <ctype.h>
  31
  32 #include "wx/gtk/private.h"
  33
  34 // ----------------------------------------------------------------------------
  35 // helpers
  36 // ----------------------------------------------------------------------------
  37
  38 extern "C" {
  39 static void wxGtkOnRemoveTag(GtkTextBuffer *buffer,
  40                              GtkTextTag *tag,
  41                              GtkTextIter * WXUNUSED(start),
  42                              GtkTextIter * WXUNUSED(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 // remove all tags starting with the given prefix from the start..end range
  57 static void
  58 wxGtkTextRemoveTagsWithPrefix(GtkTextBuffer *text_buffer,
  59                               const char *prefix,
  60                               GtkTextIter *start,
  61                               GtkTextIter *end)
  62 {
  63     gulong remove_handler_id = g_signal_connect
  64                                (
  65                                 text_buffer,
  66                                 "remove_tag",
  67                                 G_CALLBACK(wxGtkOnRemoveTag),
  68                                 gpointer(prefix)
  69                                );
  70     gtk_text_buffer_remove_all_tags(text_buffer, start, end);
  71     g_signal_handler_disconnect(text_buffer, remove_handler_id);
  72 }
  73
  74 static void wxGtkTextApplyTagsFromAttr(GtkWidget *text,
  75                                        GtkTextBuffer *text_buffer,
  76                                        const wxTextAttr& attr,
  77                                        GtkTextIter *start,
  78                                        GtkTextIter *end)
  79 {
  80     static gchar buf[1024];
  81     GtkTextTag *tag;
  82
  83     if (attr.HasFont())
  84     {
  85         wxGtkTextRemoveTagsWithPrefix(text_buffer, "WXFONT", start, end);
  86
  87         wxFont font(attr.GetFont());
  88
  89         PangoFontDescription *font_description = font.GetNativeFontInfo()->description;
  90         wxGtkString font_string(pango_font_description_to_string(font_description));
  91         g_snprintf(buf, sizeof(buf), "WXFONT %s", font_string.c_str());
  92         tag = gtk_text_tag_table_lookup( gtk_text_buffer_get_tag_table( text_buffer ),
  93                                          buf );
  94         if (!tag)
  95             tag = gtk_text_buffer_create_tag( text_buffer, buf,
  96                                               "font-desc", font_description,
  97                                               NULL );
  98         gtk_text_buffer_apply_tag (text_buffer, tag, start, end);
  99
 100         if (font.GetUnderlined())
 101         {
 102             g_snprintf(buf, sizeof(buf), "WXFONTUNDERLINE");
 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                                                   "underline-set", TRUE,
 108                                                   "underline", PANGO_UNDERLINE_SINGLE,
 109                                                   NULL );
 110             gtk_text_buffer_apply_tag (text_buffer, tag, start, end);
 111         }
 112     }
 113
 114     if (attr.HasTextColour())
 115     {
 116         wxGtkTextRemoveTagsWithPrefix(text_buffer, "WXFORECOLOR", start, end);
 117
 118         const GdkColor *colFg = attr.GetTextColour().GetColor();
 119         g_snprintf(buf, sizeof(buf), "WXFORECOLOR %d %d %d",
 120                    colFg->red, colFg->green, colFg->blue);
 121         tag = gtk_text_tag_table_lookup( gtk_text_buffer_get_tag_table( text_buffer ),
 122                                          buf );
 123         if (!tag)
 124             tag = gtk_text_buffer_create_tag( text_buffer, buf,
 125                                               "foreground-gdk", colFg, NULL );
 126         gtk_text_buffer_apply_tag (text_buffer, tag, start, end);
 127     }
 128
 129     if (attr.HasBackgroundColour())
 130     {
 131         wxGtkTextRemoveTagsWithPrefix(text_buffer, "WXBACKCOLOR", start, end);
 132
 133         const GdkColor *colBg = attr.GetBackgroundColour().GetColor();
 134         g_snprintf(buf, sizeof(buf), "WXBACKCOLOR %d %d %d",
 135                    colBg->red, colBg->green, colBg->blue);
 136         tag = gtk_text_tag_table_lookup( gtk_text_buffer_get_tag_table( text_buffer ),
 137                                          buf );
 138         if (!tag)
 139             tag = gtk_text_buffer_create_tag( text_buffer, buf,
 140                                               "background-gdk", colBg, NULL );
 141         gtk_text_buffer_apply_tag (text_buffer, tag, start, end);
 142     }
 143
 144     if (attr.HasAlignment())
 145     {
 146         GtkTextIter para_start, para_end = *end;
 147         gtk_text_buffer_get_iter_at_line( text_buffer,
 148                                           &para_start,
 149                                           gtk_text_iter_get_line(start) );
 150         gtk_text_iter_forward_line(&para_end);
 151
 152         wxGtkTextRemoveTagsWithPrefix(text_buffer, "WXALIGNMENT", &para_start, &para_end);
 153
 154         GtkJustification align;
 155         switch (attr.GetAlignment())
 156         {
 157             default:
 158                 align = GTK_JUSTIFY_LEFT;
 159                 break;
 160             case wxTEXT_ALIGNMENT_RIGHT:
 161                 align = GTK_JUSTIFY_RIGHT;
 162                 break;
 163             case wxTEXT_ALIGNMENT_CENTER:
 164                 align = GTK_JUSTIFY_CENTER;
 165                 break;
 166 // gtk+ doesn't support justify before gtk+-2.11.0 with pango-1.17 being available
 167 // (but if new enough pango isn't available it's a mere gtk warning)
 168 #if GTK_CHECK_VERSION(2,11,0)
 169             case wxTEXT_ALIGNMENT_JUSTIFIED:
 170                 if (!gtk_check_version(2,11,0))
 171                     align = GTK_JUSTIFY_FILL;
 172                 else
 173                     align = GTK_JUSTIFY_LEFT;
 174                 break;
 175 #endif
 176         }
 177
 178         g_snprintf(buf, sizeof(buf), "WXALIGNMENT %d", align);
 179         tag = gtk_text_tag_table_lookup( gtk_text_buffer_get_tag_table( text_buffer ),
 180                                          buf );
 181         if (!tag)
 182             tag = gtk_text_buffer_create_tag( text_buffer, buf,
 183                                               "justification", align, NULL );
 184         gtk_text_buffer_apply_tag( text_buffer, tag, &para_start, &para_end );
 185     }
 186
 187     if (attr.HasLeftIndent())
 188     {
 189         // Indentation attribute
 190
 191         // Clear old indentation tags
 192         GtkTextIter para_start, para_end = *end;
 193         gtk_text_buffer_get_iter_at_line( text_buffer,
 194                                           &para_start,
 195                                           gtk_text_iter_get_line(start) );
 196         gtk_text_iter_forward_line(&para_end);
 197
 198         wxGtkTextRemoveTagsWithPrefix(text_buffer, "WXINDENT", &para_start, &para_end);
 199
 200         // Convert indent from 1/10th of a mm into pixels
 201         float factor =
 202             (float)gdk_screen_get_width(gtk_widget_get_screen(text)) /
 203                       gdk_screen_get_width_mm(gtk_widget_get_screen(text)) / 10;
 204
 205         const int indent = (int)(factor * attr.GetLeftIndent());
 206         const int subIndent = (int)(factor * attr.GetLeftSubIndent());
 207
 208         gint gindent;
 209         gint gsubindent;
 210
 211         if (subIndent >= 0)
 212         {
 213             gindent = indent;
 214             gsubindent = -subIndent;
 215         }
 216         else
 217         {
 218             gindent = -subIndent;
 219             gsubindent = indent;
 220         }
 221
 222         g_snprintf(buf, sizeof(buf), "WXINDENT %d %d", gindent, gsubindent);
 223         tag = gtk_text_tag_table_lookup( gtk_text_buffer_get_tag_table( text_buffer ),
 224                                         buf );
 225         if (!tag)
 226             tag = gtk_text_buffer_create_tag( text_buffer, buf,
 227                                               "left-margin", gindent, "indent", gsubindent, NULL );
 228         gtk_text_buffer_apply_tag (text_buffer, tag, &para_start, &para_end);
 229     }
 230
 231     if (attr.HasTabs())
 232     {
 233         // Set tab stops
 234
 235         // Clear old tabs
 236         GtkTextIter para_start, para_end = *end;
 237         gtk_text_buffer_get_iter_at_line( text_buffer,
 238                                           &para_start,
 239                                           gtk_text_iter_get_line(start) );
 240         gtk_text_iter_forward_line(&para_end);
 241
 242         wxGtkTextRemoveTagsWithPrefix(text_buffer, "WXTABS", &para_start, &para_end);
 243
 244         const wxArrayInt& tabs = attr.GetTabs();
 245
 246         wxString tagname = _T("WXTABS");
 247         g_snprintf(buf, sizeof(buf), "WXTABS");
 248         for (size_t i = 0; i < tabs.GetCount(); i++)
 249             tagname += wxString::Format(_T(" %d"), tabs[i]);
 250
 251         const wxWX2MBbuf buftag = tagname.utf8_str();
 252
 253         tag = gtk_text_tag_table_lookup( gtk_text_buffer_get_tag_table( text_buffer ),
 254                                         buftag );
 255         if (!tag)
 256         {
 257             // Factor to convert from 1/10th of a mm into pixels
 258             float factor =
 259                 (float)gdk_screen_get_width(gtk_widget_get_screen(text)) /
 260                           gdk_screen_get_width_mm(gtk_widget_get_screen(text)) / 10;
 261
 262             PangoTabArray* tabArray = pango_tab_array_new(tabs.GetCount(), TRUE);
 263             for (size_t i = 0; i < tabs.GetCount(); i++)
 264                 pango_tab_array_set_tab(tabArray, i, PANGO_TAB_LEFT, (gint)(tabs[i] * factor));
 265             tag = gtk_text_buffer_create_tag( text_buffer, buftag,
 266                                               "tabs", tabArray, NULL );
 267             pango_tab_array_free(tabArray);
 268         }
 269         gtk_text_buffer_apply_tag (text_buffer, tag, &para_start, &para_end);
 270     }
 271 }
 272
 273 static void wxGtkTextInsert(GtkWidget *text,
 274                             GtkTextBuffer *text_buffer,
 275                             const wxTextAttr& attr,
 276                             const wxCharBuffer& buffer)
 277
 278 {
 279     gint start_offset;
 280     GtkTextIter iter, start;
 281
 282     gtk_text_buffer_get_iter_at_mark( text_buffer, &iter,
 283                                      gtk_text_buffer_get_insert (text_buffer) );
 284     start_offset = gtk_text_iter_get_offset (&iter);
 285     gtk_text_buffer_insert( text_buffer, &iter, buffer, strlen(buffer) );
 286
 287     gtk_text_buffer_get_iter_at_offset (text_buffer, &start, start_offset);
 288
 289     wxGtkTextApplyTagsFromAttr(text, text_buffer, attr, &start, &iter);
 290 }
 291
 292 // Implementation of wxTE_AUTO_URL for wxGTK2 by Mart Raudsepp,
 293
 294 extern "C" {
 295 static void
 296 au_apply_tag_callback(GtkTextBuffer *buffer,
 297                       GtkTextTag *tag,
 298                       GtkTextIter * WXUNUSED(start),
 299                       GtkTextIter * WXUNUSED(end),
 300                       gpointer WXUNUSED(textctrl))
 301 {
 302     if(tag == gtk_text_tag_table_lookup(gtk_text_buffer_get_tag_table(buffer), "wxUrl"))
 303         g_signal_stop_emission_by_name (buffer, "apply_tag");
 304 }
 305 }
 306
 307 //-----------------------------------------------------------------------------
 308 //  GtkTextCharPredicates for gtk_text_iter_*_find_char
 309 //-----------------------------------------------------------------------------
 310
 311 extern "C" {
 312 static gboolean
 313 pred_whitespace(gunichar ch, gpointer WXUNUSED(user_data))
 314 {
 315     return g_unichar_isspace(ch);
 316 }
 317 }
 318
 319 extern "C" {
 320 static gboolean
 321 pred_non_whitespace (gunichar ch, gpointer WXUNUSED(user_data))
 322 {
 323     return !g_unichar_isspace(ch);
 324 }
 325 }
 326
 327 extern "C" {
 328 static gboolean
 329 pred_nonpunct (gunichar ch, gpointer WXUNUSED(user_data))
 330 {
 331     return !g_unichar_ispunct(ch);
 332 }
 333 }
 334
 335 extern "C" {
 336 static gboolean
 337 pred_nonpunct_or_slash (gunichar ch, gpointer WXUNUSED(user_data))
 338 {
 339     return !g_unichar_ispunct(ch) || ch == '/';
 340 }
 341 }
 342
 343 //-----------------------------------------------------------------------------
 344 //  Check for links between s and e and correct tags as necessary
 345 //-----------------------------------------------------------------------------
 346
 347 // This function should be made match better while being efficient at one point.
 348 // Most probably with a row of regular expressions.
 349 extern "C" {
 350 static void
 351 au_check_word( GtkTextIter *s, GtkTextIter *e )
 352 {
 353     static const char *URIPrefixes[] =
 354     {
 355         "http://",
 356         "ftp://",
 357         "www.",
 358         "ftp.",
 359         "mailto://",
 360         "https://",
 361         "file://",
 362         "nntp://",
 363         "news://",
 364         "telnet://",
 365         "mms://",
 366         "gopher://",
 367         "prospero://",
 368         "wais://",
 369     };
 370
 371     GtkTextIter start = *s, end = *e;
 372     GtkTextBuffer *buffer = gtk_text_iter_get_buffer(s);
 373
 374     // Get our special link tag
 375     GtkTextTag *tag = gtk_text_tag_table_lookup(gtk_text_buffer_get_tag_table(buffer), "wxUrl");
 376
 377     // Get rid of punctuation from beginning and end.
 378     // Might want to move this to au_check_range if an improved link checking doesn't
 379     // use some intelligent punctuation checking itself (beware of undesired iter modifications).
 380     if(g_unichar_ispunct( gtk_text_iter_get_char( &start ) ) )
 381         gtk_text_iter_forward_find_char( &start, pred_nonpunct, NULL, e );
 382
 383     gtk_text_iter_backward_find_char( &end, pred_nonpunct_or_slash, NULL, &start );
 384     gtk_text_iter_forward_char(&end);
 385
 386     wxGtkString text(gtk_text_iter_get_text( &start, &end ));
 387     size_t len = strlen(text), prefix_len;
 388     size_t n;
 389
 390     for( n = 0; n < WXSIZEOF(URIPrefixes); ++n )
 391     {
 392         prefix_len = strlen(URIPrefixes[n]);
 393         if((len > prefix_len) && !strncasecmp(text, URIPrefixes[n], prefix_len))
 394             break;
 395     }
 396
 397     if(n < WXSIZEOF(URIPrefixes))
 398     {
 399         gulong signal_id = g_signal_handler_find (buffer,
 400                                                   (GSignalMatchType) (G_SIGNAL_MATCH_FUNC),
 401                                                   0, 0, NULL,
 402                                                   (gpointer)au_apply_tag_callback, NULL);
 403
 404         g_signal_handler_block (buffer, signal_id);
 405         gtk_text_buffer_apply_tag(buffer, tag, &start, &end);
 406         g_signal_handler_unblock (buffer, signal_id);
 407     }
 408 }
 409 }
 410
 411 extern "C" {
 412 static void
 413 au_check_range(GtkTextIter *s,
 414                GtkTextIter *range_end)
 415 {
 416     GtkTextIter range_start = *s;
 417     GtkTextIter word_end;
 418     GtkTextBuffer *buffer = gtk_text_iter_get_buffer(s);
 419     GtkTextTag *tag = gtk_text_tag_table_lookup(gtk_text_buffer_get_tag_table(buffer), "wxUrl");
 420
 421     gtk_text_buffer_remove_tag(buffer, tag, s, range_end);
 422
 423     if(g_unichar_isspace(gtk_text_iter_get_char(&range_start)))
 424         gtk_text_iter_forward_find_char(&range_start, pred_non_whitespace, NULL, range_end);
 425
 426     while(!gtk_text_iter_equal(&range_start, range_end))
 427     {
 428         word_end = range_start;
 429         gtk_text_iter_forward_find_char(&word_end, pred_whitespace, NULL, range_end);
 430
 431         // Now we should have a word delimited by range_start and word_end, correct link tags
 432         au_check_word(&range_start, &word_end);
 433
 434         range_start = word_end;
 435         gtk_text_iter_forward_find_char(&range_start, pred_non_whitespace, NULL, range_end);
 436     }
 437 }
 438 }
 439
 440 //-----------------------------------------------------------------------------
 441 //  "insert-text" for GtkTextBuffer
 442 //-----------------------------------------------------------------------------
 443
 444 extern "C" {
 445 static void
 446 au_insert_text_callback(GtkTextBuffer * WXUNUSED(buffer),
 447                         GtkTextIter *end,
 448                         gchar *text,
 449                         gint len,
 450                         wxTextCtrl *win)
 451 {
 452     if (!len || !(win->GetWindowStyleFlag() & wxTE_AUTO_URL) )
 453         return;
 454
 455     GtkTextIter start = *end;
 456     gtk_text_iter_backward_chars(&start, g_utf8_strlen(text, len));
 457
 458     GtkTextIter line_start = start;
 459     GtkTextIter line_end = *end;
 460     GtkTextIter words_start = start;
 461     GtkTextIter words_end = *end;
 462
 463     gtk_text_iter_set_line(&line_start, gtk_text_iter_get_line(&start));
 464     gtk_text_iter_forward_to_line_end(&line_end);
 465     gtk_text_iter_backward_find_char(&words_start, pred_whitespace, NULL, &line_start);
 466     gtk_text_iter_forward_find_char(&words_end, pred_whitespace, NULL, &line_end);
 467
 468     au_check_range(&words_start, &words_end);
 469 }
 470 }
 471
 472 //-----------------------------------------------------------------------------
 473 //  "delete-range" for GtkTextBuffer
 474 //-----------------------------------------------------------------------------
 475
 476 extern "C" {
 477 static void
 478 au_delete_range_callback(GtkTextBuffer * WXUNUSED(buffer),
 479                          GtkTextIter *start,
 480                          GtkTextIter *end,
 481                          wxTextCtrl *win)
 482 {
 483     if( !(win->GetWindowStyleFlag() & wxTE_AUTO_URL) )
 484         return;
 485
 486     GtkTextIter line_start = *start, line_end = *end;
 487
 488     gtk_text_iter_set_line(&line_start, gtk_text_iter_get_line(start));
 489     gtk_text_iter_forward_to_line_end(&line_end);
 490     gtk_text_iter_backward_find_char(start, pred_whitespace, NULL, &line_start);
 491     gtk_text_iter_forward_find_char(end, pred_whitespace, NULL, &line_end);
 492
 493     au_check_range(start, end);
 494 }
 495 }
 496
 497 //-----------------------------------------------------------------------------
 498 //  "populate_popup" from text control and "unmap" from its poup menu
 499 //-----------------------------------------------------------------------------
 500
 501 extern "C" {
 502 static void
 503 gtk_textctrl_popup_unmap( GtkMenu *WXUNUSED(menu), wxTextCtrl* win )
 504 {
 505     win->GTKEnableFocusOutEvent();
 506 }
 507 }
 508
 509 extern "C" {
 510 static void
 511 gtk_textctrl_populate_popup( GtkEntry *WXUNUSED(entry), GtkMenu *menu, wxTextCtrl *win )
 512 {
 513     win->GTKDisableFocusOutEvent();
 514
 515     g_signal_connect (menu, "unmap", G_CALLBACK (gtk_textctrl_popup_unmap), win );
 516 }
 517 }
 518
 519 //-----------------------------------------------------------------------------
 520 //  "changed"
 521 //-----------------------------------------------------------------------------
 522
 523 extern "C" {
 524 static void
 525 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxTextCtrl *win )
 526 {
 527     if ( win->IgnoreTextUpdate() )
 528         return;
 529
 530     if (!win->m_hasVMT) return;
 531
 532     if ( win->MarkDirtyOnChange() )
 533         win->MarkDirty();
 534
 535     win->SendTextUpdatedEvent();
 536 }
 537 }
 538
 539 //-----------------------------------------------------------------------------
 540 //  clipboard events: "copy-clipboard", "cut-clipboard", "paste-clipboard"
 541 //-----------------------------------------------------------------------------
 542
 543 // common part of the event handlers below
 544 static void
 545 handle_text_clipboard_callback( GtkWidget *widget, wxTextCtrl *win,
 546                                 wxEventType eventType, const gchar * signal_name)
 547 {
 548     wxClipboardTextEvent event( eventType, win->GetId() );
 549     event.SetEventObject( win );
 550     if ( win->HandleWindowEvent( event ) )
 551     {
 552         // don't let the default processing to take place if we did something
 553         // ourselves in the event handler
 554         g_signal_stop_emission_by_name (widget, signal_name);
 555     }
 556 }
 557
 558 extern "C" {
 559 static void
 560 gtk_copy_clipboard_callback( GtkWidget *widget, wxTextCtrl *win )
 561 {
 562     handle_text_clipboard_callback(
 563         widget, win, wxEVT_COMMAND_TEXT_COPY, "copy-clipboard" );
 564 }
 565
 566 static void
 567 gtk_cut_clipboard_callback( GtkWidget *widget, wxTextCtrl *win )
 568 {
 569     handle_text_clipboard_callback(
 570         widget, win, wxEVT_COMMAND_TEXT_CUT, "cut-clipboard" );
 571 }
 572
 573 static void
 574 gtk_paste_clipboard_callback( GtkWidget *widget, wxTextCtrl *win )
 575 {
 576     handle_text_clipboard_callback(
 577         widget, win, wxEVT_COMMAND_TEXT_PASTE, "paste-clipboard" );
 578 }
 579 }
 580
 581 //-----------------------------------------------------------------------------
 582 //  wxTextCtrl
 583 //-----------------------------------------------------------------------------
 584
 585 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxTextCtrlBase)
 586
 587 BEGIN_EVENT_TABLE(wxTextCtrl, wxTextCtrlBase)
 588     EVT_CHAR(wxTextCtrl::OnChar)
 589
 590     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 591     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 592     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 593     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 594     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 595
 596     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 597     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 598     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 599     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 600     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 601
 602     // wxTE_AUTO_URL wxTextUrl support. Currently only creates
 603     // wxTextUrlEvent in the same cases as wxMSW, more can be added here.
 604     EVT_MOTION      (wxTextCtrl::OnUrlMouseEvent)
 605     EVT_LEFT_DOWN   (wxTextCtrl::OnUrlMouseEvent)
 606     EVT_LEFT_UP     (wxTextCtrl::OnUrlMouseEvent)
 607     EVT_LEFT_DCLICK (wxTextCtrl::OnUrlMouseEvent)
 608     EVT_RIGHT_DOWN  (wxTextCtrl::OnUrlMouseEvent)
 609     EVT_RIGHT_UP    (wxTextCtrl::OnUrlMouseEvent)
 610     EVT_RIGHT_DCLICK(wxTextCtrl::OnUrlMouseEvent)
 611 END_EVENT_TABLE()
 612
 613 void wxTextCtrl::Init()
 614 {
 615     m_dontMarkDirty =
 616     m_modified = false;
 617
 618     m_countUpdatesToIgnore = 0;
 619
 620     SetUpdateFont(false);
 621
 622     m_text = NULL;
 623     m_showPositionOnThaw = NULL;
 624     m_gdkHandCursor = NULL;
 625     m_gdkXTermCursor = NULL;
 626 }
 627
 628 wxTextCtrl::~wxTextCtrl()
 629 {
 630     if(m_gdkHandCursor)
 631         gdk_cursor_unref(m_gdkHandCursor);
 632     if(m_gdkXTermCursor)
 633         gdk_cursor_unref(m_gdkXTermCursor);
 634 }
 635
 636 wxTextCtrl::wxTextCtrl( wxWindow *parent,
 637                         wxWindowID id,
 638                         const wxString &value,
 639                         const wxPoint &pos,
 640                         const wxSize &size,
 641                         long style,
 642                         const wxValidator& validator,
 643                         const wxString &name )
 644 {
 645     Init();
 646
 647     Create( parent, id, value, pos, size, style, validator, name );
 648 }
 649
 650 bool wxTextCtrl::Create( wxWindow *parent,
 651                          wxWindowID id,
 652                          const wxString &value,
 653                          const wxPoint &pos,
 654                          const wxSize &size,
 655                          long style,
 656                          const wxValidator& validator,
 657                          const wxString &name )
 658 {
 659     if (!PreCreation( parent, pos, size ) ||
 660         !CreateBase( parent, id, pos, size, style, validator, name ))
 661     {
 662         wxFAIL_MSG( wxT("wxTextCtrl creation failed") );
 663         return false;
 664     }
 665
 666     bool multi_line = (style & wxTE_MULTILINE) != 0;
 667
 668     if (multi_line)
 669     {
 670         // Create view
 671         m_text = gtk_text_view_new();
 672
 673         m_buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(m_text) );
 674
 675         // create "ShowPosition" marker
 676         GtkTextIter iter;
 677         gtk_text_buffer_get_start_iter(m_buffer, &iter);
 678         gtk_text_buffer_create_mark(m_buffer, "ShowPosition", &iter, true);
 679
 680         // create scrolled window
 681         m_widget = gtk_scrolled_window_new( NULL, NULL );
 682         gtk_scrolled_window_set_policy( GTK_SCROLLED_WINDOW( m_widget ),
 683                                         GTK_POLICY_AUTOMATIC,
 684                                         style & wxTE_NO_VSCROLL
 685                                             ? GTK_POLICY_NEVER
 686                                             : GTK_POLICY_AUTOMATIC );
 687         // for ScrollLines/Pages
 688         m_scrollBar[1] = (GtkRange*)((GtkScrolledWindow*)m_widget)->vscrollbar;
 689
 690         // Insert view into scrolled window
 691         gtk_container_add( GTK_CONTAINER(m_widget), m_text );
 692
 693         GTKSetWrapMode();
 694
 695         GTKScrolledWindowSetBorder(m_widget, style);
 696
 697         gtk_widget_add_events( GTK_WIDGET(m_text), GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK );
 698
 699         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 700     }
 701     else
 702     {
 703         // a single-line text control: no need for scrollbars
 704         m_widget =
 705         m_text = gtk_entry_new();
 706
 707         if (style & wxNO_BORDER)
 708             g_object_set (m_text, "has-frame", FALSE, NULL);
 709
 710     }
 711     g_object_ref(m_widget);
 712
 713     m_parent->DoAddChild( this );
 714
 715     m_focusWidget = m_text;
 716
 717     PostCreation(size);
 718
 719     if (multi_line)
 720     {
 721         gtk_widget_show(m_text);
 722     }
 723
 724     // We want to be notified about text changes.
 725     if (multi_line)
 726     {
 727         g_signal_connect (m_buffer, "changed",
 728                           G_CALLBACK (gtk_text_changed_callback), this);
 729     }
 730     else
 731     {
 732         g_signal_connect (m_text, "changed",
 733                           G_CALLBACK (gtk_text_changed_callback), this);
 734     }
 735
 736     // Catch to disable focus out handling
 737     g_signal_connect (m_text, "populate_popup",
 738                       G_CALLBACK (gtk_textctrl_populate_popup),
 739                       this);
 740
 741     if (!value.empty())
 742     {
 743         SetValue( value );
 744     }
 745
 746     if (style & wxTE_PASSWORD)
 747         GTKSetVisibility();
 748
 749     if (style & wxTE_READONLY)
 750         GTKSetEditable();
 751
 752     // left justification (alignment) is the default anyhow
 753     if ( style & (wxTE_RIGHT | wxTE_CENTRE) )
 754         GTKSetJustification();
 755
 756     if (multi_line)
 757     {
 758         // Handle URLs on multi-line controls with wxTE_AUTO_URL style
 759         if (style & wxTE_AUTO_URL)
 760         {
 761             GtkTextIter start, end;
 762             m_gdkHandCursor = gdk_cursor_new(GDK_HAND2);
 763             m_gdkXTermCursor = gdk_cursor_new(GDK_XTERM);
 764
 765             // We create our wxUrl tag here for slight efficiency gain - we
 766             // don't have to check for the tag existance in callbacks,
 767             // hereby it's guaranteed to exist.
 768             gtk_text_buffer_create_tag(m_buffer, "wxUrl",
 769                                        "foreground", "blue",
 770                                        "underline", PANGO_UNDERLINE_SINGLE,
 771                                        NULL);
 772
 773             // Check for URLs after each text change
 774             g_signal_connect_after (m_buffer, "insert_text",
 775                                     G_CALLBACK (au_insert_text_callback), this);
 776             g_signal_connect_after (m_buffer, "delete_range",
 777                                     G_CALLBACK (au_delete_range_callback), this);
 778
 779             // Block all wxUrl tag applying unless we do it ourselves, in which case we
 780             // block this callback temporarily. This takes care of gtk+ internal
 781             // gtk_text_buffer_insert_range* calls that would copy our URL tag otherwise,
 782             // which is undesired because only a part of the URL might be copied.
 783             // The insert-text signal emitted inside it will take care of newly formed
 784             // or wholly copied URLs.
 785             g_signal_connect (m_buffer, "apply_tag",
 786                               G_CALLBACK (au_apply_tag_callback), NULL);
 787
 788             // Check for URLs in the initial string passed to Create
 789             gtk_text_buffer_get_start_iter(m_buffer, &start);
 790             gtk_text_buffer_get_end_iter(m_buffer, &end);
 791             au_check_range(&start, &end);
 792         }
 793     }
 794     else // single line
 795     {
 796         // do the right thing with Enter presses depending on whether we have
 797         // wxTE_PROCESS_ENTER or not
 798         GTKSetActivatesDefault();
 799     }
 800
 801
 802     g_signal_connect (m_text, "copy-clipboard",
 803                       G_CALLBACK (gtk_copy_clipboard_callback), this);
 804     g_signal_connect (m_text, "cut-clipboard",
 805                       G_CALLBACK (gtk_cut_clipboard_callback), this);
 806     g_signal_connect (m_text, "paste-clipboard",
 807                       G_CALLBACK (gtk_paste_clipboard_callback), this);
 808
 809     m_cursor = wxCursor( wxCURSOR_IBEAM );
 810
 811     return true;
 812 }
 813
 814 GtkEditable *wxTextCtrl::GetEditable() const
 815 {
 816     wxCHECK_MSG( IsSingleLine(), NULL, "shouldn't be called for multiline" );
 817
 818     return GTK_EDITABLE(m_text);
 819 }
 820
 821 // ----------------------------------------------------------------------------
 822 // flags handling
 823 // ----------------------------------------------------------------------------
 824
 825 void wxTextCtrl::GTKSetEditable()
 826 {
 827     gboolean editable = !HasFlag(wxTE_READONLY);
 828     if ( IsSingleLine() )
 829         gtk_editable_set_editable(GTK_EDITABLE(m_text), editable);
 830     else
 831         gtk_text_view_set_editable(GTK_TEXT_VIEW(m_text), editable);
 832 }
 833
 834 void wxTextCtrl::GTKSetVisibility()
 835 {
 836     wxCHECK_RET( IsSingleLine(),
 837                  "wxTE_PASSWORD is for single line text controls only" );
 838
 839     gtk_entry_set_visibility(GTK_ENTRY(m_text), !HasFlag(wxTE_PASSWORD));
 840 }
 841
 842 void wxTextCtrl::GTKSetActivatesDefault()
 843 {
 844     wxCHECK_RET( IsSingleLine(),
 845                  "wxTE_PROCESS_ENTER is for single line text controls only" );
 846
 847     gtk_entry_set_activates_default(GTK_ENTRY(m_text),
 848                                     !HasFlag(wxTE_PROCESS_ENTER));
 849 }
 850
 851 void wxTextCtrl::GTKSetWrapMode()
 852 {
 853     // no wrapping in single line controls
 854     if ( !IsMultiLine() )
 855         return;
 856
 857     // translate wx wrapping style to GTK+
 858     GtkWrapMode wrap;
 859     if ( HasFlag( wxTE_DONTWRAP ) )
 860         wrap = GTK_WRAP_NONE;
 861     else if ( HasFlag( wxTE_CHARWRAP ) )
 862         wrap = GTK_WRAP_CHAR;
 863     else if ( HasFlag( wxTE_WORDWRAP ) )
 864         wrap = GTK_WRAP_WORD;
 865     else // HasFlag(wxTE_BESTWRAP) always true as wxTE_BESTWRAP == 0
 866         wrap = GTK_WRAP_WORD_CHAR;
 867
 868     gtk_text_view_set_wrap_mode( GTK_TEXT_VIEW( m_text ), wrap );
 869 }
 870
 871 void wxTextCtrl::GTKSetJustification()
 872 {
 873     if ( IsMultiLine() )
 874     {
 875         GtkJustification just;
 876         if ( HasFlag(wxTE_RIGHT) )
 877             just = GTK_JUSTIFY_RIGHT;
 878         else if ( HasFlag(wxTE_CENTRE) )
 879             just = GTK_JUSTIFY_CENTER;
 880         else // wxTE_LEFT == 0
 881             just = GTK_JUSTIFY_LEFT;
 882
 883         gtk_text_view_set_justification(GTK_TEXT_VIEW(m_text), just);
 884     }
 885     else // single line
 886     {
 887         gfloat align;
 888         if ( HasFlag(wxTE_RIGHT) )
 889             align = 1.0;
 890         else if ( HasFlag(wxTE_CENTRE) )
 891             align = 0.5;
 892         else // single line
 893             align = 0.0;
 894
 895         gtk_entry_set_alignment(GTK_ENTRY(m_text), align);
 896     }
 897 }
 898
 899 void wxTextCtrl::SetWindowStyleFlag(long style)
 900 {
 901     long styleOld = GetWindowStyleFlag();
 902
 903     wxTextCtrlBase::SetWindowStyleFlag(style);
 904
 905     if ( (style & wxTE_READONLY) != (styleOld & wxTE_READONLY) )
 906         GTKSetEditable();
 907
 908     if ( (style & wxTE_PASSWORD) != (styleOld & wxTE_PASSWORD) )
 909         GTKSetVisibility();
 910
 911     if ( (style & wxTE_PROCESS_ENTER) != (styleOld & wxTE_PROCESS_ENTER) )
 912         GTKSetActivatesDefault();
 913
 914     static const long flagsWrap = wxTE_WORDWRAP | wxTE_CHARWRAP | wxTE_DONTWRAP;
 915     if ( (style & flagsWrap) != (styleOld & flagsWrap) )
 916         GTKSetWrapMode();
 917
 918     static const long flagsAlign = wxTE_LEFT | wxTE_CENTRE | wxTE_RIGHT;
 919     if ( (style & flagsAlign) != (styleOld & flagsAlign) )
 920         GTKSetJustification();
 921 }
 922
 923 // ----------------------------------------------------------------------------
 924 // control value
 925 // ----------------------------------------------------------------------------
 926
 927 wxString wxTextCtrl::GetValue() const
 928 {
 929     wxCHECK_MSG( m_text != NULL, wxEmptyString, wxT("invalid text ctrl") );
 930
 931     if ( IsMultiLine() )
 932     {
 933         GtkTextIter start;
 934         gtk_text_buffer_get_start_iter( m_buffer, &start );
 935         GtkTextIter end;
 936         gtk_text_buffer_get_end_iter( m_buffer, &end );
 937         wxGtkString text(gtk_text_buffer_get_text(m_buffer, &start, &end, true));
 938
 939         return wxGTK_CONV_BACK(text);
 940     }
 941     else // single line
 942     {
 943         return wxTextEntry::GetValue();
 944     }
 945 }
 946
 947 wxFontEncoding wxTextCtrl::GetTextEncoding() const
 948 {
 949     // GTK+ uses UTF-8 internally, we need to convert to it but from which
 950     // encoding?
 951
 952     // first check the default text style (we intentionally don't check the
 953     // style for the current position as it doesn't make sense for SetValue())
 954     const wxTextAttr& style = GetDefaultStyle();
 955     wxFontEncoding enc = style.HasFontEncoding() ? style.GetFontEncoding()
 956                                          : wxFONTENCODING_SYSTEM;
 957
 958     // fall back to the controls font if no style
 959     if ( enc == wxFONTENCODING_SYSTEM && m_hasFont )
 960         enc = GetFont().GetEncoding();
 961
 962     return enc;
 963 }
 964
 965 bool wxTextCtrl::IsEmpty() const
 966 {
 967     if ( IsMultiLine() )
 968         return gtk_text_buffer_get_char_count(m_buffer) == 0;
 969
 970     return wxTextEntry::IsEmpty();
 971 }
 972
 973 void wxTextCtrl::DoSetValue( const wxString &value, int flags )
 974 {
 975     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 976
 977     m_modified = false;
 978
 979     if ( !IsMultiLine() )
 980     {
 981         wxTextEntry::DoSetValue(value, flags);
 982         return;
 983     }
 984
 985     if (value.IsEmpty())
 986     {
 987         if ( !(flags & SetValue_SendEvent) )
 988             EnableTextChangedEvents(false);
 989
 990         gtk_text_buffer_set_text( m_buffer, "", 0 );
 991
 992         if ( !(flags & SetValue_SendEvent) )
 993             EnableTextChangedEvents(true);
 994
 995         return;
 996     }
 997
 998 #if wxUSE_UNICODE
 999     const wxCharBuffer buffer(value.utf8_str());
1000 #else
1001     wxFontEncoding enc = m_defaultStyle.HasFont()
1002                             ? m_defaultStyle.GetFont().GetEncoding()
1003                             : wxFONTENCODING_SYSTEM;
1004     if ( enc == wxFONTENCODING_SYSTEM )
1005         enc = GetTextEncoding();
1006
1007     const wxCharBuffer buffer(wxGTK_CONV_ENC(value, enc));
1008     if ( !buffer )
1009     {
1010         // see comment in WriteText() as to why we must warn the user about
1011         // this
1012         wxLogWarning(_("Failed to set text in the text control."));
1013         return;
1014     }
1015 #endif
1016
1017     if ( !(flags & SetValue_SendEvent) )
1018     {
1019         EnableTextChangedEvents(false);
1020     }
1021
1022     gtk_text_buffer_set_text( m_buffer, buffer, strlen(buffer) );
1023
1024     if ( !m_defaultStyle.IsDefault() )
1025     {
1026         GtkTextIter start, end;
1027         gtk_text_buffer_get_bounds( m_buffer, &start, &end );
1028         wxGtkTextApplyTagsFromAttr(m_widget, m_buffer, m_defaultStyle,
1029                                    &start, &end);
1030     }
1031
1032     if ( !(flags & SetValue_SendEvent) )
1033     {
1034         EnableTextChangedEvents(true);
1035     }
1036 }
1037
1038 void wxTextCtrl::WriteText( const wxString &text )
1039 {
1040     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1041
1042     // we're changing the text programmatically
1043     DontMarkDirtyOnNextChange();
1044
1045     if ( !IsMultiLine() )
1046     {
1047         wxTextEntry::WriteText(text);
1048         return;
1049     }
1050
1051 #if wxUSE_UNICODE
1052     const wxCharBuffer buffer(text.utf8_str());
1053 #else
1054     // check if we have a specific style for the current position
1055     wxFontEncoding enc = wxFONTENCODING_SYSTEM;
1056     wxTextAttr style;
1057     if ( GetStyle(GetInsertionPoint(), style) && style.HasFontEncoding() )
1058     {
1059         enc = style.GetFontEncoding();
1060     }
1061
1062     if ( enc == wxFONTENCODING_SYSTEM )
1063         enc = GetTextEncoding();
1064
1065     const wxCharBuffer buffer(wxGTK_CONV_ENC(text, enc));
1066     if ( !buffer )
1067     {
1068         // we must log an error here as losing the text like this can be a
1069         // serious problem (e.g. imagine the document edited by user being
1070         // empty instead of containing the correct text)
1071         wxLogWarning(_("Failed to insert text in the control."));
1072         return;
1073     }
1074 #endif
1075
1076     // First remove the selection if there is one
1077     // TODO:  Is there an easier GTK specific way to do this?
1078     long from, to;
1079     GetSelection(&from, &to);
1080     if (from != to)
1081         Remove(from, to);
1082
1083     // Insert the text
1084     wxGtkTextInsert( m_text, m_buffer, m_defaultStyle, buffer );
1085
1086     GtkAdjustment *adj = gtk_scrolled_window_get_vadjustment( GTK_SCROLLED_WINDOW(m_widget) );
1087     // Scroll to cursor, but only if scrollbar thumb is at the very bottom
1088     // won't work when frozen, text view is not using m_buffer then
1089     if (!IsFrozen() && wxIsSameDouble(adj->value, adj->upper - adj->page_size))
1090     {
1091         gtk_text_view_scroll_to_mark( GTK_TEXT_VIEW(m_text),
1092                 gtk_text_buffer_get_insert( m_buffer ), 0.0, FALSE, 0.0, 1.0 );
1093     }
1094 }
1095
1096 wxString wxTextCtrl::GetLineText( long lineNo ) const
1097 {
1098     wxString result;
1099     if ( IsMultiLine() )
1100     {
1101         GtkTextIter line;
1102         gtk_text_buffer_get_iter_at_line(m_buffer,&line,lineNo);
1103
1104         GtkTextIter end = line;
1105         // avoid skipping to the next line end if this one is empty
1106         if ( !gtk_text_iter_ends_line(&line) )
1107             gtk_text_iter_forward_to_line_end(&end);
1108
1109         wxGtkString text(gtk_text_buffer_get_text(m_buffer, &line, &end, true));
1110         result = wxGTK_CONV_BACK(text);
1111     }
1112     else
1113     {
1114         if (lineNo == 0)
1115             result = GetValue();
1116     }
1117     return result;
1118 }
1119
1120 void wxTextCtrl::OnDropFiles( wxDropFilesEvent &WXUNUSED(event) )
1121 {
1122   /* If you implement this, don't forget to update the documentation!
1123    * (file docs/latex/wx/text.tex) */
1124     wxFAIL_MSG( wxT("wxTextCtrl::OnDropFiles not implemented") );
1125 }
1126
1127 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y ) const
1128 {
1129     if ( IsMultiLine() )
1130     {
1131         GtkTextIter iter;
1132
1133         if (pos > GetLastPosition())
1134             return false;
1135
1136         gtk_text_buffer_get_iter_at_offset(m_buffer, &iter, pos);
1137
1138         if ( y )
1139             *y = gtk_text_iter_get_line(&iter);
1140         if ( x )
1141             *x = gtk_text_iter_get_line_offset(&iter);
1142     }
1143     else // single line control
1144     {
1145         if ( pos <= GTK_ENTRY(m_text)->text_length )
1146         {
1147             if ( y )
1148                 *y = 0;
1149             if ( x )
1150                 *x = pos;
1151         }
1152         else
1153         {
1154             // index out of bounds
1155             return false;
1156         }
1157     }
1158
1159     return true;
1160 }
1161
1162 long wxTextCtrl::XYToPosition(long x, long y ) const
1163 {
1164     if ( IsSingleLine() )
1165         return 0;
1166
1167     GtkTextIter iter;
1168     if (y >= gtk_text_buffer_get_line_count (m_buffer))
1169         return -1;
1170
1171     gtk_text_buffer_get_iter_at_line(m_buffer, &iter, y);
1172     if (x >= gtk_text_iter_get_chars_in_line (&iter))
1173         return -1;
1174
1175     return gtk_text_iter_get_offset(&iter) + x;
1176 }
1177
1178 int wxTextCtrl::GetLineLength(long lineNo) const
1179 {
1180     if ( IsMultiLine() )
1181     {
1182         int last_line = gtk_text_buffer_get_line_count( m_buffer ) - 1;
1183         if (lineNo > last_line)
1184             return -1;
1185
1186         GtkTextIter iter;
1187         gtk_text_buffer_get_iter_at_line(m_buffer, &iter, lineNo);
1188         // get_chars_in_line return includes paragraph delimiters, so need to subtract 1 IF it is not the last line
1189         return gtk_text_iter_get_chars_in_line(&iter) - ((lineNo == last_line) ? 0 : 1);
1190     }
1191     else
1192     {
1193         wxString str = GetLineText (lineNo);
1194         return (int) str.length();
1195     }
1196 }
1197
1198 int wxTextCtrl::GetNumberOfLines() const
1199 {
1200     if ( IsMultiLine() )
1201     {
1202         return gtk_text_buffer_get_line_count( m_buffer );
1203     }
1204     else // single line
1205     {
1206         return 1;
1207     }
1208 }
1209
1210 void wxTextCtrl::SetInsertionPoint( long pos )
1211 {
1212     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1213
1214     if ( IsMultiLine() )
1215     {
1216         GtkTextIter iter;
1217         gtk_text_buffer_get_iter_at_offset( m_buffer, &iter, pos );
1218         gtk_text_buffer_place_cursor( m_buffer, &iter );
1219         GtkTextMark* mark = gtk_text_buffer_get_insert(m_buffer);
1220         if (IsFrozen())
1221             // defer until Thaw, text view is not using m_buffer now
1222             m_showPositionOnThaw = mark;
1223         else
1224             gtk_text_view_scroll_mark_onscreen(GTK_TEXT_VIEW(m_text), mark);
1225     }
1226     else // single line
1227     {
1228         wxTextEntry::SetInsertionPoint(pos);
1229     }
1230 }
1231
1232 void wxTextCtrl::SetEditable( bool editable )
1233 {
1234     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1235
1236     if ( IsMultiLine() )
1237     {
1238         gtk_text_view_set_editable( GTK_TEXT_VIEW(m_text), editable );
1239     }
1240     else // single line
1241     {
1242         wxTextEntry::SetEditable(editable);
1243     }
1244 }
1245
1246 bool wxTextCtrl::Enable( bool enable )
1247 {
1248     if (!wxWindowBase::Enable(enable))
1249     {
1250         // nothing to do
1251         return false;
1252     }
1253
1254     gtk_widget_set_sensitive( m_text, enable );
1255     SetCursor(enable ? wxCursor(wxCURSOR_IBEAM) : wxCursor());
1256
1257     return true;
1258 }
1259
1260 // wxGTK-specific: called recursively by Enable,
1261 // to give widgets an opportunity to correct their colours after they
1262 // have been changed by Enable
1263 void wxTextCtrl::OnEnabled(bool WXUNUSED(enable))
1264 {
1265     // If we have a custom background colour, we use this colour in both
1266     // disabled and enabled mode, or we end up with a different colour under the
1267     // text.
1268     wxColour oldColour = GetBackgroundColour();
1269     if (oldColour.Ok())
1270     {
1271         // Need to set twice or it'll optimize the useful stuff out
1272         if (oldColour == * wxWHITE)
1273             SetBackgroundColour(*wxBLACK);
1274         else
1275             SetBackgroundColour(*wxWHITE);
1276         SetBackgroundColour(oldColour);
1277     }
1278 }
1279
1280 void wxTextCtrl::MarkDirty()
1281 {
1282     m_modified = true;
1283 }
1284
1285 void wxTextCtrl::DiscardEdits()
1286 {
1287     m_modified = false;
1288 }
1289
1290 // ----------------------------------------------------------------------------
1291 // event handling
1292 // ----------------------------------------------------------------------------
1293
1294 void wxTextCtrl::EnableTextChangedEvents(bool enable)
1295 {
1296     if ( enable )
1297     {
1298         g_signal_handlers_unblock_by_func(GetTextObject(),
1299             (gpointer)gtk_text_changed_callback, this);
1300     }
1301     else // disable events
1302     {
1303         g_signal_handlers_block_by_func(GetTextObject(),
1304             (gpointer)gtk_text_changed_callback, this);
1305     }
1306 }
1307
1308 bool wxTextCtrl::IgnoreTextUpdate()
1309 {
1310     if ( m_countUpdatesToIgnore > 0 )
1311     {
1312         m_countUpdatesToIgnore--;
1313
1314         return true;
1315     }
1316
1317     return false;
1318 }
1319
1320 bool wxTextCtrl::MarkDirtyOnChange()
1321 {
1322     if ( m_dontMarkDirty )
1323     {
1324         m_dontMarkDirty = false;
1325
1326         return false;
1327     }
1328
1329     return true;
1330 }
1331
1332 void wxTextCtrl::SetSelection( long from, long to )
1333 {
1334     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1335
1336     if (from == -1 && to == -1)
1337     {
1338         from = 0;
1339         to = GetValue().length();
1340     }
1341
1342     if ( IsMultiLine() )
1343     {
1344         GtkTextIter fromi, toi;
1345         gtk_text_buffer_get_iter_at_offset( m_buffer, &fromi, from );
1346         gtk_text_buffer_get_iter_at_offset( m_buffer, &toi, to );
1347
1348         gtk_text_buffer_select_range( m_buffer, &fromi, &toi );
1349     }
1350     else // single line
1351     {
1352         wxTextEntry::SetSelection(from, to);
1353     }
1354 }
1355
1356 void wxTextCtrl::ShowPosition( long pos )
1357 {
1358     if (IsMultiLine())
1359     {
1360         GtkTextIter iter;
1361         gtk_text_buffer_get_iter_at_offset(m_buffer, &iter, int(pos));
1362         GtkTextMark* mark = gtk_text_buffer_get_mark(m_buffer, "ShowPosition");
1363         gtk_text_buffer_move_mark(m_buffer, mark, &iter);
1364         if (IsFrozen())
1365             // defer until Thaw, text view is not using m_buffer now
1366             m_showPositionOnThaw = mark;
1367         else
1368             gtk_text_view_scroll_mark_onscreen(GTK_TEXT_VIEW(m_text), mark);
1369     }
1370 }
1371
1372 wxTextCtrlHitTestResult
1373 wxTextCtrl::HitTest(const wxPoint& pt, long *pos) const
1374 {
1375     if ( !IsMultiLine() )
1376     {
1377         // not supported
1378         return wxTE_HT_UNKNOWN;
1379     }
1380
1381     int x, y;
1382     gtk_text_view_window_to_buffer_coords
1383     (
1384         GTK_TEXT_VIEW(m_text),
1385         GTK_TEXT_WINDOW_TEXT,
1386         pt.x, pt.y,
1387         &x, &y
1388     );
1389
1390     GtkTextIter iter;
1391     gtk_text_view_get_iter_at_location(GTK_TEXT_VIEW(m_text), &iter, x, y);
1392     if ( pos )
1393         *pos = gtk_text_iter_get_offset(&iter);
1394
1395     return wxTE_HT_ON_TEXT;
1396 }
1397
1398 long wxTextCtrl::GetInsertionPoint() const
1399 {
1400     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
1401
1402     if ( IsMultiLine() )
1403     {
1404         // There is no direct accessor for the cursor, but
1405         // internally, the cursor is the "mark" called
1406         // "insert" in the text view's btree structure.
1407
1408         GtkTextMark *mark = gtk_text_buffer_get_insert( m_buffer );
1409         GtkTextIter cursor;
1410         gtk_text_buffer_get_iter_at_mark( m_buffer, &cursor, mark );
1411
1412         return gtk_text_iter_get_offset( &cursor );
1413     }
1414     else
1415     {
1416         return wxTextEntry::GetInsertionPoint();
1417     }
1418 }
1419
1420 wxTextPos wxTextCtrl::GetLastPosition() const
1421 {
1422     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
1423
1424     int pos = 0;
1425
1426     if ( IsMultiLine() )
1427     {
1428         GtkTextIter end;
1429         gtk_text_buffer_get_end_iter( m_buffer, &end );
1430
1431         pos = gtk_text_iter_get_offset( &end );
1432     }
1433     else // single line
1434     {
1435         pos = wxTextEntry::GetLastPosition();
1436     }
1437
1438     return (long)pos;
1439 }
1440
1441 void wxTextCtrl::Remove( long from, long to )
1442 {
1443     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1444
1445     if ( IsMultiLine() )
1446     {
1447         GtkTextIter fromi, toi;
1448         gtk_text_buffer_get_iter_at_offset( m_buffer, &fromi, from );
1449         gtk_text_buffer_get_iter_at_offset( m_buffer, &toi, to );
1450
1451         gtk_text_buffer_delete( m_buffer, &fromi, &toi );
1452     }
1453     else // single line
1454     {
1455         wxTextEntry::Remove(from, to);
1456     }
1457 }
1458
1459 void wxTextCtrl::Cut()
1460 {
1461     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1462
1463     if ( IsMultiLine() )
1464         g_signal_emit_by_name (m_text, "cut-clipboard");
1465     else
1466         wxTextEntry::Cut();
1467 }
1468
1469 void wxTextCtrl::Copy()
1470 {
1471     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1472
1473     if ( IsMultiLine() )
1474         g_signal_emit_by_name (m_text, "copy-clipboard");
1475     else
1476         wxTextEntry::Copy();
1477 }
1478
1479 void wxTextCtrl::Paste()
1480 {
1481     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1482
1483     if ( IsMultiLine() )
1484         g_signal_emit_by_name (m_text, "paste-clipboard");
1485     else
1486         wxTextEntry::Paste();
1487 }
1488
1489 // If the return values from and to are the same, there is no
1490 // selection.
1491 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
1492 {
1493     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1494
1495     if ( !IsMultiLine() )
1496     {
1497         wxTextEntry::GetSelection(fromOut, toOut);
1498         return;
1499     }
1500
1501     gint from, to;
1502
1503     GtkTextIter ifrom, ito;
1504     if ( gtk_text_buffer_get_selection_bounds(m_buffer, &ifrom, &ito) )
1505     {
1506         from = gtk_text_iter_get_offset(&ifrom);
1507         to = gtk_text_iter_get_offset(&ito);
1508
1509         if ( from > to )
1510         {
1511             // exchange them to be compatible with wxMSW
1512             gint tmp = from;
1513             from = to;
1514             to = tmp;
1515         }
1516     }
1517     else // no selection
1518     {
1519         from =
1520         to = GetInsertionPoint();
1521     }
1522
1523     if ( fromOut )
1524         *fromOut = from;
1525     if ( toOut )
1526         *toOut = to;
1527 }
1528
1529
1530 bool wxTextCtrl::IsEditable() const
1531 {
1532     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1533
1534     if ( IsMultiLine() )
1535     {
1536         return gtk_text_view_get_editable(GTK_TEXT_VIEW(m_text));
1537     }
1538     else
1539     {
1540         return wxTextEntry::IsEditable();
1541     }
1542 }
1543
1544 bool wxTextCtrl::IsModified() const
1545 {
1546     return m_modified;
1547 }
1548
1549 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
1550 {
1551     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1552
1553     if ( key_event.GetKeyCode() == WXK_RETURN )
1554     {
1555         if ( HasFlag(wxTE_PROCESS_ENTER) )
1556         {
1557             wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1558             event.SetEventObject(this);
1559             event.SetString(GetValue());
1560             if ( HandleWindowEvent(event) )
1561                 return;
1562         }
1563     }
1564
1565     key_event.Skip();
1566 }
1567
1568 GtkWidget* wxTextCtrl::GetConnectWidget()
1569 {
1570     return GTK_WIDGET(m_text);
1571 }
1572
1573 GdkWindow *wxTextCtrl::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
1574 {
1575     if ( IsMultiLine() )
1576     {
1577         return gtk_text_view_get_window(GTK_TEXT_VIEW(m_text),
1578                                         GTK_TEXT_WINDOW_TEXT );
1579     }
1580     else
1581     {
1582         return GTK_ENTRY(m_text)->text_area;
1583     }
1584 }
1585
1586 // the font will change for subsequent text insertiongs
1587 bool wxTextCtrl::SetFont( const wxFont &font )
1588 {
1589     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1590
1591     if ( !wxTextCtrlBase::SetFont(font) )
1592     {
1593         // font didn't change, nothing to do
1594         return false;
1595     }
1596
1597     if ( IsMultiLine() )
1598     {
1599         SetUpdateFont(true);
1600
1601         m_defaultStyle.SetFont(font);
1602
1603         ChangeFontGlobally();
1604     }
1605
1606     return true;
1607 }
1608
1609 void wxTextCtrl::ChangeFontGlobally()
1610 {
1611     // this method is very inefficient and hence should be called as rarely as
1612     // possible!
1613     //
1614     // TODO: it can be implemented much more efficiently for GTK2
1615     wxASSERT_MSG( IsMultiLine(),
1616                   _T("shouldn't be called for single line controls") );
1617
1618     wxString value = GetValue();
1619     if ( !value.empty() )
1620     {
1621         SetUpdateFont(false);
1622
1623         Clear();
1624         AppendText(value);
1625     }
1626 }
1627
1628 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1629 {
1630     if ( !wxControl::SetForegroundColour(colour) )
1631         return false;
1632
1633     // update default fg colour too
1634     m_defaultStyle.SetTextColour(colour);
1635
1636     return true;
1637 }
1638
1639 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1640 {
1641     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1642
1643     if ( !wxControl::SetBackgroundColour( colour ) )
1644         return false;
1645
1646     if (!m_backgroundColour.Ok())
1647         return false;
1648
1649     // change active background color too
1650     m_defaultStyle.SetBackgroundColour( colour );
1651
1652     return true;
1653 }
1654
1655 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr& style )
1656 {
1657     if ( IsMultiLine() )
1658     {
1659         if ( style.IsDefault() )
1660         {
1661             // nothing to do
1662             return true;
1663         }
1664
1665         gint l = gtk_text_buffer_get_char_count( m_buffer );
1666
1667         wxCHECK_MSG( start >= 0 && end <= l, false,
1668                      _T("invalid range in wxTextCtrl::SetStyle") );
1669
1670         GtkTextIter starti, endi;
1671         gtk_text_buffer_get_iter_at_offset( m_buffer, &starti, start );
1672         gtk_text_buffer_get_iter_at_offset( m_buffer, &endi, end );
1673
1674         wxGtkTextApplyTagsFromAttr( m_widget, m_buffer, style, &starti, &endi );
1675
1676         return true;
1677     }
1678     //else: single line text controls don't support styles
1679
1680     return false;
1681 }
1682
1683 void wxTextCtrl::DoApplyWidgetStyle(GtkRcStyle *style)
1684 {
1685     gtk_widget_modify_style(m_text, style);
1686 }
1687
1688 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1689 {
1690     Cut();
1691 }
1692
1693 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1694 {
1695     Copy();
1696 }
1697
1698 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1699 {
1700     Paste();
1701 }
1702
1703 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1704 {
1705     Undo();
1706 }
1707
1708 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1709 {
1710     Redo();
1711 }
1712
1713 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1714 {
1715     event.Enable( CanCut() );
1716 }
1717
1718 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1719 {
1720     event.Enable( CanCopy() );
1721 }
1722
1723 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1724 {
1725     event.Enable( CanPaste() );
1726 }
1727
1728 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1729 {
1730     event.Enable( CanUndo() );
1731 }
1732
1733 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1734 {
1735     event.Enable( CanRedo() );
1736 }
1737
1738 wxSize wxTextCtrl::DoGetBestSize() const
1739 {
1740     // FIXME should be different for multi-line controls...
1741     wxSize ret( wxControl::DoGetBestSize() );
1742     wxSize best(80, ret.y);
1743     CacheBestSize(best);
1744     return best;
1745 }
1746
1747 // ----------------------------------------------------------------------------
1748 // freeze/thaw
1749 // ----------------------------------------------------------------------------
1750
1751 void wxTextCtrl::DoFreeze()
1752 {
1753     wxCHECK_RET(m_text != NULL, wxT("invalid text ctrl"));
1754
1755     wxWindow::DoFreeze();
1756
1757     if ( HasFlag(wxTE_MULTILINE) )
1758     {
1759         GTKFreezeWidget(m_text);
1760
1761         // removing buffer dramatically speeds up insertion:
1762         g_object_ref(m_buffer);
1763         GtkTextBuffer* buf_new = gtk_text_buffer_new(NULL);
1764         GtkTextMark* mark = GTK_TEXT_VIEW(m_text)->first_para_mark;
1765         gtk_text_view_set_buffer(GTK_TEXT_VIEW(m_text), buf_new);
1766         // gtk_text_view_set_buffer adds its own reference
1767         g_object_unref(buf_new);
1768         // This mark should be deleted when the buffer is changed,
1769         // but it's not (in GTK+ up to at least 2.10.6).
1770         // Otherwise these anonymous marks start to build up in the buffer,
1771         // and Freeze takes longer and longer each time it is called.
1772         if (GTK_IS_TEXT_MARK(mark) && !gtk_text_mark_get_deleted(mark))
1773             gtk_text_buffer_delete_mark(m_buffer, mark);
1774     }
1775 }
1776
1777 void wxTextCtrl::DoThaw()
1778 {
1779     if ( HasFlag(wxTE_MULTILINE) )
1780     {
1781         // reattach buffer:
1782         gtk_text_view_set_buffer(GTK_TEXT_VIEW(m_text), m_buffer);
1783         g_object_unref(m_buffer);
1784
1785         if (m_showPositionOnThaw != NULL)
1786         {
1787             gtk_text_view_scroll_mark_onscreen(
1788                 GTK_TEXT_VIEW(m_text), m_showPositionOnThaw);
1789             m_showPositionOnThaw = NULL;
1790         }
1791
1792         // and thaw the window
1793         GTKThawWidget(m_text);
1794     }
1795
1796     wxWindow::DoThaw();
1797 }
1798
1799 // ----------------------------------------------------------------------------
1800 // wxTextUrlEvent passing if style & wxTE_AUTO_URL
1801 // ----------------------------------------------------------------------------
1802
1803 // FIXME: when dragging on a link the sample gets an "Unknown event".
1804 // This might be an excessive event from us or a buggy wxMouseEvent::Moving() or
1805 // a buggy sample, or something else
1806 void wxTextCtrl::OnUrlMouseEvent(wxMouseEvent& event)
1807 {
1808     event.Skip();
1809     if( !HasFlag(wxTE_AUTO_URL) )
1810         return;
1811
1812     gint x, y;
1813     GtkTextIter start, end;
1814     GtkTextTag *tag = gtk_text_tag_table_lookup(gtk_text_buffer_get_tag_table(m_buffer),
1815                                                 "wxUrl");
1816
1817     gtk_text_view_window_to_buffer_coords(GTK_TEXT_VIEW(m_text), GTK_TEXT_WINDOW_WIDGET,
1818                                           event.GetX(), event.GetY(), &x, &y);
1819
1820     gtk_text_view_get_iter_at_location(GTK_TEXT_VIEW(m_text), &end, x, y);
1821     if (!gtk_text_iter_has_tag(&end, tag))
1822     {
1823         gdk_window_set_cursor(gtk_text_view_get_window(GTK_TEXT_VIEW(m_text),
1824                               GTK_TEXT_WINDOW_TEXT), m_gdkXTermCursor);
1825         return;
1826     }
1827
1828     gdk_window_set_cursor(gtk_text_view_get_window(GTK_TEXT_VIEW(m_text),
1829                           GTK_TEXT_WINDOW_TEXT), m_gdkHandCursor);
1830
1831     start = end;
1832     if(!gtk_text_iter_begins_tag(&start, tag))
1833         gtk_text_iter_backward_to_tag_toggle(&start, tag);
1834     if(!gtk_text_iter_ends_tag(&end, tag))
1835         gtk_text_iter_forward_to_tag_toggle(&end, tag);
1836
1837     // Native context menu is probably not desired on an URL.
1838     // Consider making this dependant on ProcessEvent(wxTextUrlEvent) return value
1839     if(event.GetEventType() == wxEVT_RIGHT_DOWN)
1840         event.Skip(false);
1841
1842     wxTextUrlEvent url_event(m_windowId, event,
1843                              gtk_text_iter_get_offset(&start),
1844                              gtk_text_iter_get_offset(&end));
1845
1846     InitCommandEvent(url_event);
1847     // Is that a good idea? Seems not (pleasure with gtk_text_view_start_selection_drag)
1848     //event.Skip(!HandleWindowEvent(url_event));
1849     HandleWindowEvent(url_event);
1850 }
1851
1852 bool wxTextCtrl::GTKProcessEvent(wxEvent& event) const
1853 {
1854     bool rc = wxTextCtrlBase::GTKProcessEvent(event);
1855
1856     // GtkTextView starts a drag operation when left mouse button is pressed
1857     // and ends it when it is released and if it doesn't get the release event
1858     // the next click on a control results in an assertion failure inside
1859     // gtk_text_view_start_selection_drag() which simply *kills* the program
1860     // without anything we can do about it, so always let GTK+ have this event
1861     return rc && (IsSingleLine() || event.GetEventType() != wxEVT_LEFT_UP);
1862 }
1863
1864 // static
1865 wxVisualAttributes
1866 wxTextCtrl::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1867 {
1868     return GetDefaultAttributesFromGTKWidget(gtk_entry_new, true);
1869 }
1870
1871 #endif // wxUSE_TEXTCTRL