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", start, 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", start, end);
 199
 200         // Convert indent from 1/10th of a mm into pixels
 201         float factor;
 202 #if GTK_CHECK_VERSION(2,2,0)
 203         if (!gtk_check_version(2,2,0))
 204             factor = (float)gdk_screen_get_width(gtk_widget_get_screen(text)) /
 205                       gdk_screen_get_width_mm(gtk_widget_get_screen(text)) / 10;
 206         else
 207 #endif
 208             factor = (float)gdk_screen_width() / gdk_screen_width_mm() / 10;
 209
 210         const int indent = (int)(factor * attr.GetLeftIndent());
 211         const int subIndent = (int)(factor * attr.GetLeftSubIndent());
 212
 213         gint gindent;
 214         gint gsubindent;
 215
 216         if (subIndent >= 0)
 217         {
 218             gindent = indent;
 219             gsubindent = -subIndent;
 220         }
 221         else
 222         {
 223             gindent = -subIndent;
 224             gsubindent = indent;
 225         }
 226
 227         g_snprintf(buf, sizeof(buf), "WXINDENT %d %d", gindent, gsubindent);
 228         tag = gtk_text_tag_table_lookup( gtk_text_buffer_get_tag_table( text_buffer ),
 229                                         buf );
 230         if (!tag)
 231             tag = gtk_text_buffer_create_tag( text_buffer, buf,
 232                                               "left-margin", gindent, "indent", gsubindent, NULL );
 233         gtk_text_buffer_apply_tag (text_buffer, tag, &para_start, &para_end);
 234     }
 235
 236     if (attr.HasTabs())
 237     {
 238         // Set tab stops
 239
 240         // Clear old tabs
 241         GtkTextIter para_start, para_end = *end;
 242         gtk_text_buffer_get_iter_at_line( text_buffer,
 243                                           &para_start,
 244                                           gtk_text_iter_get_line(start) );
 245         gtk_text_iter_forward_line(&para_end);
 246
 247         wxGtkTextRemoveTagsWithPrefix(text_buffer, "WXTABS", start, end);
 248
 249         const wxArrayInt& tabs = attr.GetTabs();
 250
 251         wxString tagname = _T("WXTABS");
 252         g_snprintf(buf, sizeof(buf), "WXTABS");
 253         for (size_t i = 0; i < tabs.GetCount(); i++)
 254             tagname += wxString::Format(_T(" %d"), tabs[i]);
 255
 256         const wxWX2MBbuf buftag = tagname.utf8_str();
 257
 258         tag = gtk_text_tag_table_lookup( gtk_text_buffer_get_tag_table( text_buffer ),
 259                                         buftag );
 260         if (!tag)
 261         {
 262             // Factor to convert from 1/10th of a mm into pixels
 263             float factor;
 264 #if GTK_CHECK_VERSION(2,2,0)
 265             if (!gtk_check_version(2,2,0))
 266                 factor = (float)gdk_screen_get_width(gtk_widget_get_screen(text)) /
 267                           gdk_screen_get_width_mm(gtk_widget_get_screen(text)) / 10;
 268             else
 269 #endif
 270                 factor = (float)gdk_screen_width() / gdk_screen_width_mm() / 10;
 271
 272             PangoTabArray* tabArray = pango_tab_array_new(tabs.GetCount(), TRUE);
 273             for (size_t i = 0; i < tabs.GetCount(); i++)
 274                 pango_tab_array_set_tab(tabArray, i, PANGO_TAB_LEFT, (gint)(tabs[i] * factor));
 275             tag = gtk_text_buffer_create_tag( text_buffer, buftag,
 276                                               "tabs", tabArray, NULL );
 277             pango_tab_array_free(tabArray);
 278         }
 279         gtk_text_buffer_apply_tag (text_buffer, tag, &para_start, &para_end);
 280     }
 281 }
 282
 283 static void wxGtkTextInsert(GtkWidget *text,
 284                             GtkTextBuffer *text_buffer,
 285                             const wxTextAttr& attr,
 286                             const wxCharBuffer& buffer)
 287
 288 {
 289     gint start_offset;
 290     GtkTextIter iter, start;
 291
 292     gtk_text_buffer_get_iter_at_mark( text_buffer, &iter,
 293                                      gtk_text_buffer_get_insert (text_buffer) );
 294     start_offset = gtk_text_iter_get_offset (&iter);
 295     gtk_text_buffer_insert( text_buffer, &iter, buffer, strlen(buffer) );
 296
 297     gtk_text_buffer_get_iter_at_offset (text_buffer, &start, start_offset);
 298
 299     wxGtkTextApplyTagsFromAttr(text, text_buffer, attr, &start, &iter);
 300 }
 301
 302 // Implementation of wxTE_AUTO_URL for wxGTK2 by Mart Raudsepp,
 303
 304 extern "C" {
 305 static void
 306 au_apply_tag_callback(GtkTextBuffer *buffer,
 307                       GtkTextTag *tag,
 308                       GtkTextIter * WXUNUSED(start),
 309                       GtkTextIter * WXUNUSED(end),
 310                       gpointer WXUNUSED(textctrl))
 311 {
 312     if(tag == gtk_text_tag_table_lookup(gtk_text_buffer_get_tag_table(buffer), "wxUrl"))
 313         g_signal_stop_emission_by_name (buffer, "apply_tag");
 314 }
 315 }
 316
 317 //-----------------------------------------------------------------------------
 318 //  GtkTextCharPredicates for gtk_text_iter_*_find_char
 319 //-----------------------------------------------------------------------------
 320
 321 extern "C" {
 322 static gboolean
 323 pred_whitespace(gunichar ch, gpointer WXUNUSED(user_data))
 324 {
 325     return g_unichar_isspace(ch);
 326 }
 327 }
 328
 329 extern "C" {
 330 static gboolean
 331 pred_non_whitespace (gunichar ch, gpointer WXUNUSED(user_data))
 332 {
 333     return !g_unichar_isspace(ch);
 334 }
 335 }
 336
 337 extern "C" {
 338 static gboolean
 339 pred_nonpunct (gunichar ch, gpointer WXUNUSED(user_data))
 340 {
 341     return !g_unichar_ispunct(ch);
 342 }
 343 }
 344
 345 extern "C" {
 346 static gboolean
 347 pred_nonpunct_or_slash (gunichar ch, gpointer WXUNUSED(user_data))
 348 {
 349     return !g_unichar_ispunct(ch) || ch == '/';
 350 }
 351 }
 352
 353 //-----------------------------------------------------------------------------
 354 //  Check for links between s and e and correct tags as necessary
 355 //-----------------------------------------------------------------------------
 356
 357 // This function should be made match better while being efficient at one point.
 358 // Most probably with a row of regular expressions.
 359 extern "C" {
 360 static void
 361 au_check_word( GtkTextIter *s, GtkTextIter *e )
 362 {
 363     static const char *URIPrefixes[] =
 364     {
 365         "http://",
 366         "ftp://",
 367         "www.",
 368         "ftp.",
 369         "mailto://",
 370         "https://",
 371         "file://",
 372         "nntp://",
 373         "news://",
 374         "telnet://",
 375         "mms://",
 376         "gopher://",
 377         "prospero://",
 378         "wais://",
 379     };
 380
 381     GtkTextIter start = *s, end = *e;
 382     GtkTextBuffer *buffer = gtk_text_iter_get_buffer(s);
 383
 384     // Get our special link tag
 385     GtkTextTag *tag = gtk_text_tag_table_lookup(gtk_text_buffer_get_tag_table(buffer), "wxUrl");
 386
 387     // Get rid of punctuation from beginning and end.
 388     // Might want to move this to au_check_range if an improved link checking doesn't
 389     // use some intelligent punctuation checking itself (beware of undesired iter modifications).
 390     if(g_unichar_ispunct( gtk_text_iter_get_char( &start ) ) )
 391         gtk_text_iter_forward_find_char( &start, pred_nonpunct, NULL, e );
 392
 393     gtk_text_iter_backward_find_char( &end, pred_nonpunct_or_slash, NULL, &start );
 394     gtk_text_iter_forward_char(&end);
 395
 396     wxGtkString text(gtk_text_iter_get_text( &start, &end ));
 397     size_t len = strlen(text), prefix_len;
 398     size_t n;
 399
 400     for( n = 0; n < WXSIZEOF(URIPrefixes); ++n )
 401     {
 402         prefix_len = strlen(URIPrefixes[n]);
 403         if((len > prefix_len) && !strncasecmp(text, URIPrefixes[n], prefix_len))
 404             break;
 405     }
 406
 407     if(n < WXSIZEOF(URIPrefixes))
 408     {
 409         gulong signal_id = g_signal_handler_find (buffer,
 410                                                   (GSignalMatchType) (G_SIGNAL_MATCH_FUNC),
 411                                                   0, 0, NULL,
 412                                                   (gpointer)au_apply_tag_callback, NULL);
 413
 414         g_signal_handler_block (buffer, signal_id);
 415         gtk_text_buffer_apply_tag(buffer, tag, &start, &end);
 416         g_signal_handler_unblock (buffer, signal_id);
 417     }
 418 }
 419 }
 420
 421 extern "C" {
 422 static void
 423 au_check_range(GtkTextIter *s,
 424                GtkTextIter *range_end)
 425 {
 426     GtkTextIter range_start = *s;
 427     GtkTextIter word_end;
 428     GtkTextBuffer *buffer = gtk_text_iter_get_buffer(s);
 429     GtkTextTag *tag = gtk_text_tag_table_lookup(gtk_text_buffer_get_tag_table(buffer), "wxUrl");
 430
 431     gtk_text_buffer_remove_tag(buffer, tag, s, range_end);
 432
 433     if(g_unichar_isspace(gtk_text_iter_get_char(&range_start)))
 434         gtk_text_iter_forward_find_char(&range_start, pred_non_whitespace, NULL, range_end);
 435
 436     while(!gtk_text_iter_equal(&range_start, range_end))
 437     {
 438         word_end = range_start;
 439         gtk_text_iter_forward_find_char(&word_end, pred_whitespace, NULL, range_end);
 440
 441         // Now we should have a word delimited by range_start and word_end, correct link tags
 442         au_check_word(&range_start, &word_end);
 443
 444         range_start = word_end;
 445         gtk_text_iter_forward_find_char(&range_start, pred_non_whitespace, NULL, range_end);
 446     }
 447 }
 448 }
 449
 450 //-----------------------------------------------------------------------------
 451 //  "insert-text" for GtkTextBuffer
 452 //-----------------------------------------------------------------------------
 453
 454 extern "C" {
 455 static void
 456 au_insert_text_callback(GtkTextBuffer * WXUNUSED(buffer),
 457                         GtkTextIter *end,
 458                         gchar *text,
 459                         gint len,
 460                         wxTextCtrl *win)
 461 {
 462     if (!len || !(win->GetWindowStyleFlag() & wxTE_AUTO_URL) )
 463         return;
 464
 465     GtkTextIter start = *end;
 466     gtk_text_iter_backward_chars(&start, g_utf8_strlen(text, len));
 467
 468     GtkTextIter line_start = start;
 469     GtkTextIter line_end = *end;
 470     GtkTextIter words_start = start;
 471     GtkTextIter words_end = *end;
 472
 473     gtk_text_iter_set_line(&line_start, gtk_text_iter_get_line(&start));
 474     gtk_text_iter_forward_to_line_end(&line_end);
 475     gtk_text_iter_backward_find_char(&words_start, pred_whitespace, NULL, &line_start);
 476     gtk_text_iter_forward_find_char(&words_end, pred_whitespace, NULL, &line_end);
 477
 478     au_check_range(&words_start, &words_end);
 479 }
 480 }
 481
 482 //-----------------------------------------------------------------------------
 483 //  "delete-range" for GtkTextBuffer
 484 //-----------------------------------------------------------------------------
 485
 486 extern "C" {
 487 static void
 488 au_delete_range_callback(GtkTextBuffer * WXUNUSED(buffer),
 489                          GtkTextIter *start,
 490                          GtkTextIter *end,
 491                          wxTextCtrl *win)
 492 {
 493     if( !(win->GetWindowStyleFlag() & wxTE_AUTO_URL) )
 494         return;
 495
 496     GtkTextIter line_start = *start, line_end = *end;
 497
 498     gtk_text_iter_set_line(&line_start, gtk_text_iter_get_line(start));
 499     gtk_text_iter_forward_to_line_end(&line_end);
 500     gtk_text_iter_backward_find_char(start, pred_whitespace, NULL, &line_start);
 501     gtk_text_iter_forward_find_char(end, pred_whitespace, NULL, &line_end);
 502
 503     au_check_range(start, end);
 504 }
 505 }
 506
 507
 508 //-----------------------------------------------------------------------------
 509 //  "changed"
 510 //-----------------------------------------------------------------------------
 511
 512 extern "C" {
 513 static void
 514 gtk_text_changed_callback( GtkWidget * WXUNUSED(widget), wxTextCtrl *win )
 515 {
 516     if ( win->IgnoreTextUpdate() )
 517         return;
 518
 519     if (!win->m_hasVMT) return;
 520
 521     if ( win->MarkDirtyOnChange() )
 522         win->MarkDirty();
 523
 524     win->SendTextUpdatedEvent();
 525 }
 526 }
 527
 528 //-----------------------------------------------------------------------------
 529 //  clipboard events: "copy-clipboard", "cut-clipboard", "paste-clipboard"
 530 //-----------------------------------------------------------------------------
 531
 532 // common part of the event handlers below
 533 static void
 534 handle_text_clipboard_callback( GtkWidget *widget, wxTextCtrl *win,
 535                                 wxEventType eventType, const gchar * signal_name)
 536 {
 537     wxClipboardTextEvent event( eventType, win->GetId() );
 538     event.SetEventObject( win );
 539     if ( win->GetEventHandler()->ProcessEvent( event ) )
 540     {
 541         // don't let the default processing to take place if we did something
 542         // ourselves in the event handler
 543         g_signal_stop_emission_by_name (widget, signal_name);
 544     }
 545 }
 546
 547 extern "C" {
 548 static void
 549 gtk_copy_clipboard_callback( GtkWidget *widget, wxTextCtrl *win )
 550 {
 551     handle_text_clipboard_callback(
 552         widget, win, wxEVT_COMMAND_TEXT_COPY, "copy-clipboard" );
 553 }
 554
 555 static void
 556 gtk_cut_clipboard_callback( GtkWidget *widget, wxTextCtrl *win )
 557 {
 558     handle_text_clipboard_callback(
 559         widget, win, wxEVT_COMMAND_TEXT_CUT, "cut-clipboard" );
 560 }
 561
 562 static void
 563 gtk_paste_clipboard_callback( GtkWidget *widget, wxTextCtrl *win )
 564 {
 565     handle_text_clipboard_callback(
 566         widget, win, wxEVT_COMMAND_TEXT_PASTE, "paste-clipboard" );
 567 }
 568 }
 569
 570 //-----------------------------------------------------------------------------
 571 // "expose_event" from scrolled window and textview
 572 //-----------------------------------------------------------------------------
 573
 574 extern "C" {
 575 static gboolean
 576 gtk_text_exposed_callback( GtkWidget * WXUNUSED(widget),
 577                            GdkEventExpose * WXUNUSED(event),
 578                            wxTextCtrl * WXUNUSED(win) )
 579 {
 580     return TRUE;
 581 }
 582 }
 583
 584
 585 //-----------------------------------------------------------------------------
 586 //  wxTextCtrl
 587 //-----------------------------------------------------------------------------
 588
 589 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxTextCtrlBase)
 590
 591 BEGIN_EVENT_TABLE(wxTextCtrl, wxTextCtrlBase)
 592     EVT_CHAR(wxTextCtrl::OnChar)
 593
 594     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 595     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 596     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 597     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 598     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 599
 600     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 601     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 602     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 603     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 604     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 605
 606     // wxTE_AUTO_URL wxTextUrl support. Currently only creates
 607     // wxTextUrlEvent in the same cases as wxMSW, more can be added here.
 608     EVT_MOTION      (wxTextCtrl::OnUrlMouseEvent)
 609     EVT_LEFT_DOWN   (wxTextCtrl::OnUrlMouseEvent)
 610     EVT_LEFT_UP     (wxTextCtrl::OnUrlMouseEvent)
 611     EVT_LEFT_DCLICK (wxTextCtrl::OnUrlMouseEvent)
 612     EVT_RIGHT_DOWN  (wxTextCtrl::OnUrlMouseEvent)
 613     EVT_RIGHT_UP    (wxTextCtrl::OnUrlMouseEvent)
 614     EVT_RIGHT_DCLICK(wxTextCtrl::OnUrlMouseEvent)
 615 END_EVENT_TABLE()
 616
 617 void wxTextCtrl::Init()
 618 {
 619     m_dontMarkDirty =
 620     m_modified = false;
 621
 622     m_countUpdatesToIgnore = 0;
 623
 624     SetUpdateFont(false);
 625
 626     m_text = NULL;
 627     m_freezeCount = 0;
 628     m_showPositionOnThaw = NULL;
 629     m_gdkHandCursor = NULL;
 630     m_gdkXTermCursor = NULL;
 631 }
 632
 633 wxTextCtrl::~wxTextCtrl()
 634 {
 635     if(m_gdkHandCursor)
 636         gdk_cursor_unref(m_gdkHandCursor);
 637     if(m_gdkXTermCursor)
 638         gdk_cursor_unref(m_gdkXTermCursor);
 639 }
 640
 641 wxTextCtrl::wxTextCtrl( wxWindow *parent,
 642                         wxWindowID id,
 643                         const wxString &value,
 644                         const wxPoint &pos,
 645                         const wxSize &size,
 646                         long style,
 647                         const wxValidator& validator,
 648                         const wxString &name )
 649 {
 650     Init();
 651
 652     Create( parent, id, value, pos, size, style, validator, name );
 653 }
 654
 655 bool wxTextCtrl::Create( wxWindow *parent,
 656                          wxWindowID id,
 657                          const wxString &value,
 658                          const wxPoint &pos,
 659                          const wxSize &size,
 660                          long style,
 661                          const wxValidator& validator,
 662                          const wxString &name )
 663 {
 664     if (!PreCreation( parent, pos, size ) ||
 665         !CreateBase( parent, id, pos, size, style, validator, name ))
 666     {
 667         wxFAIL_MSG( wxT("wxTextCtrl creation failed") );
 668         return false;
 669     }
 670
 671     bool multi_line = (style & wxTE_MULTILINE) != 0;
 672
 673     if (multi_line)
 674     {
 675         // Create view
 676         m_text = gtk_text_view_new();
 677
 678         m_buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(m_text) );
 679
 680         // create "ShowPosition" marker
 681         GtkTextIter iter;
 682         gtk_text_buffer_get_start_iter(m_buffer, &iter);
 683         gtk_text_buffer_create_mark(m_buffer, "ShowPosition", &iter, true);
 684
 685         // create scrolled window
 686         m_widget = gtk_scrolled_window_new( NULL, NULL );
 687         gtk_scrolled_window_set_policy( GTK_SCROLLED_WINDOW( m_widget ),
 688                                         GTK_POLICY_AUTOMATIC,
 689                                         style & wxTE_NO_VSCROLL
 690                                             ? GTK_POLICY_NEVER
 691                                             : GTK_POLICY_AUTOMATIC );
 692         // for ScrollLines/Pages
 693         m_scrollBar[1] = (GtkRange*)((GtkScrolledWindow*)m_widget)->vscrollbar;
 694
 695         // Insert view into scrolled window
 696         gtk_container_add( GTK_CONTAINER(m_widget), m_text );
 697
 698         GTKSetWrapMode();
 699
 700         GtkScrolledWindowSetBorder(m_widget, style);
 701
 702         gtk_widget_add_events( GTK_WIDGET(m_text), GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK );
 703
 704         GTK_WIDGET_UNSET_FLAGS( m_widget, GTK_CAN_FOCUS );
 705     }
 706     else
 707     {
 708         // a single-line text control: no need for scrollbars
 709         m_widget =
 710         m_text = gtk_entry_new();
 711
 712         if (style & wxNO_BORDER)
 713             g_object_set (m_text, "has-frame", FALSE, NULL);
 714     }
 715
 716     m_parent->DoAddChild( this );
 717
 718     m_focusWidget = m_text;
 719
 720     PostCreation(size);
 721
 722     if (multi_line)
 723     {
 724         gtk_widget_show(m_text);
 725     }
 726
 727     // We want to be notified about text changes.
 728     if (multi_line)
 729     {
 730         g_signal_connect (m_buffer, "changed",
 731                           G_CALLBACK (gtk_text_changed_callback), this);
 732     }
 733     else
 734     {
 735         g_signal_connect (m_text, "changed",
 736                           G_CALLBACK (gtk_text_changed_callback), this);
 737     }
 738
 739     if (!value.empty())
 740     {
 741         SetValue( value );
 742     }
 743
 744     if (style & wxTE_PASSWORD)
 745         GTKSetVisibility();
 746
 747     if (style & wxTE_READONLY)
 748         GTKSetEditable();
 749
 750     if (style & wxTE_PROCESS_ENTER)
 751         GTKSetActivatesDefault();
 752
 753     // left justification (alignment) is the default anyhow
 754     if ( style & (wxTE_RIGHT | wxTE_CENTRE) )
 755         GTKSetJustification();
 756
 757     if (multi_line)
 758     {
 759         // Handle URLs on multi-line controls with wxTE_AUTO_URL style
 760         if (style & wxTE_AUTO_URL)
 761         {
 762             GtkTextIter start, end;
 763             m_gdkHandCursor = gdk_cursor_new(GDK_HAND2);
 764             m_gdkXTermCursor = gdk_cursor_new(GDK_XTERM);
 765
 766             // We create our wxUrl tag here for slight efficiency gain - we
 767             // don't have to check for the tag existance in callbacks,
 768             // hereby it's guaranteed to exist.
 769             gtk_text_buffer_create_tag(m_buffer, "wxUrl",
 770                                        "foreground", "blue",
 771                                        "underline", PANGO_UNDERLINE_SINGLE,
 772                                        NULL);
 773
 774             // Check for URLs after each text change
 775             g_signal_connect_after (m_buffer, "insert_text",
 776                                     G_CALLBACK (au_insert_text_callback), this);
 777             g_signal_connect_after (m_buffer, "delete_range",
 778                                     G_CALLBACK (au_delete_range_callback), this);
 779
 780             // Block all wxUrl tag applying unless we do it ourselves, in which case we
 781             // block this callback temporarily. This takes care of gtk+ internal
 782             // gtk_text_buffer_insert_range* calls that would copy our URL tag otherwise,
 783             // which is undesired because only a part of the URL might be copied.
 784             // The insert-text signal emitted inside it will take care of newly formed
 785             // or wholly copied URLs.
 786             g_signal_connect (m_buffer, "apply_tag",
 787                               G_CALLBACK (au_apply_tag_callback), NULL);
 788
 789             // Check for URLs in the initial string passed to Create
 790             gtk_text_buffer_get_start_iter(m_buffer, &start);
 791             gtk_text_buffer_get_end_iter(m_buffer, &end);
 792             au_check_range(&start, &end);
 793         }
 794     }
 795
 796     g_signal_connect (m_text, "copy-clipboard",
 797                       G_CALLBACK (gtk_copy_clipboard_callback), this);
 798     g_signal_connect (m_text, "cut-clipboard",
 799                       G_CALLBACK (gtk_cut_clipboard_callback), this);
 800     g_signal_connect (m_text, "paste-clipboard",
 801                       G_CALLBACK (gtk_paste_clipboard_callback), this);
 802
 803     m_cursor = wxCursor( wxCURSOR_IBEAM );
 804
 805     return true;
 806 }
 807
 808 GtkEditable *wxTextCtrl::GetEditable() const
 809 {
 810     wxCHECK_MSG( IsSingleLine(), NULL, "shouldn't be called for multiline" );
 811
 812     return GTK_EDITABLE(m_text);
 813 }
 814
 815 // ----------------------------------------------------------------------------
 816 // flags handling
 817 // ----------------------------------------------------------------------------
 818
 819 void wxTextCtrl::GTKSetEditable()
 820 {
 821     gboolean editable = !HasFlag(wxTE_READONLY);
 822     if ( IsSingleLine() )
 823         gtk_editable_set_editable(GTK_EDITABLE(m_text), editable);
 824     else
 825         gtk_text_view_set_editable(GTK_TEXT_VIEW(m_text), editable);
 826 }
 827
 828 void wxTextCtrl::GTKSetVisibility()
 829 {
 830     wxCHECK_RET( IsSingleLine(),
 831                  "wxTE_PASSWORD is for single line text controls only" );
 832
 833     gtk_entry_set_visibility(GTK_ENTRY(m_text), !HasFlag(wxTE_PASSWORD));
 834 }
 835
 836 void wxTextCtrl::GTKSetActivatesDefault()
 837 {
 838     wxCHECK_RET( IsSingleLine(),
 839                  "wxTE_PROCESS_ENTER is for single line text controls only" );
 840
 841     gtk_entry_set_activates_default(GTK_ENTRY(m_text),
 842                                     !HasFlag(wxTE_PROCESS_ENTER));
 843 }
 844
 845 void wxTextCtrl::GTKSetWrapMode()
 846 {
 847     // no wrapping in single line controls
 848     if ( !IsMultiLine() )
 849         return;
 850
 851     // translate wx wrapping style to GTK+
 852     GtkWrapMode wrap;
 853     if ( HasFlag( wxTE_DONTWRAP ) )
 854         wrap = GTK_WRAP_NONE;
 855     else if ( HasFlag( wxTE_CHARWRAP ) )
 856         wrap = GTK_WRAP_CHAR;
 857     else if ( HasFlag( wxTE_WORDWRAP ) )
 858         wrap = GTK_WRAP_WORD;
 859     else // HasFlag(wxTE_BESTWRAP) always true as wxTE_BESTWRAP == 0
 860     {
 861         // GTK_WRAP_WORD_CHAR seems to be new in GTK+ 2.4
 862 #ifdef __WXGTK24__
 863         if ( !gtk_check_version(2,4,0) )
 864         {
 865             wrap = GTK_WRAP_WORD_CHAR;
 866         }
 867         else
 868 #endif // __WXGTK24__
 869         wrap = GTK_WRAP_WORD;
 870     }
 871
 872     gtk_text_view_set_wrap_mode( GTK_TEXT_VIEW( m_text ), wrap );
 873 }
 874
 875 void wxTextCtrl::GTKSetJustification()
 876 {
 877     if ( IsMultiLine() )
 878     {
 879         GtkJustification just;
 880         if ( HasFlag(wxTE_RIGHT) )
 881             just = GTK_JUSTIFY_RIGHT;
 882         else if ( HasFlag(wxTE_CENTRE) )
 883             just = GTK_JUSTIFY_CENTER;
 884         else // wxTE_LEFT == 0
 885             just = GTK_JUSTIFY_LEFT;
 886
 887         gtk_text_view_set_justification(GTK_TEXT_VIEW(m_text), just);
 888     }
 889     else // single line
 890     {
 891 #ifdef __WXGTK24__
 892         // gtk_entry_set_alignment was introduced in gtk+-2.3.5
 893         if (!gtk_check_version(2,4,0))
 894         {
 895             gfloat align;
 896             if ( HasFlag(wxTE_RIGHT) )
 897                 align = 1.0;
 898             else if ( HasFlag(wxTE_CENTRE) )
 899                 align = 0.5;
 900             else // single line
 901                 align = 0.0;
 902
 903             gtk_entry_set_alignment(GTK_ENTRY(m_text), align);
 904         }
 905 #endif // __WXGTK24__
 906     }
 907
 908 }
 909
 910 void wxTextCtrl::SetWindowStyleFlag(long style)
 911 {
 912     long styleOld = GetWindowStyleFlag();
 913
 914     wxTextCtrlBase::SetWindowStyleFlag(style);
 915
 916     if ( (style & wxTE_READONLY) != (styleOld & wxTE_READONLY) )
 917         GTKSetEditable();
 918
 919     if ( (style & wxTE_PASSWORD) != (styleOld & wxTE_PASSWORD) )
 920         GTKSetVisibility();
 921
 922     if ( (style & wxTE_PROCESS_ENTER) != (styleOld & wxTE_PROCESS_ENTER) )
 923         GTKSetActivatesDefault();
 924
 925     static const long flagsWrap = wxTE_WORDWRAP | wxTE_CHARWRAP | wxTE_DONTWRAP;
 926     if ( (style & flagsWrap) != (styleOld & flagsWrap) )
 927         GTKSetWrapMode();
 928
 929     static const long flagsAlign = wxTE_LEFT | wxTE_CENTRE | wxTE_RIGHT;
 930     if ( (style & flagsAlign) != (styleOld & flagsAlign) )
 931         GTKSetJustification();
 932 }
 933
 934 // ----------------------------------------------------------------------------
 935 // control value
 936 // ----------------------------------------------------------------------------
 937
 938 wxString wxTextCtrl::GetValue() const
 939 {
 940     wxCHECK_MSG( m_text != NULL, wxEmptyString, wxT("invalid text ctrl") );
 941
 942     if ( IsMultiLine() )
 943     {
 944         GtkTextIter start;
 945         gtk_text_buffer_get_start_iter( m_buffer, &start );
 946         GtkTextIter end;
 947         gtk_text_buffer_get_end_iter( m_buffer, &end );
 948         wxGtkString text(gtk_text_buffer_get_text(m_buffer, &start, &end, true));
 949
 950         return wxGTK_CONV_BACK(text);
 951     }
 952     else // single line
 953     {
 954         return wxTextEntry::GetValue();
 955     }
 956 }
 957
 958 wxFontEncoding wxTextCtrl::GetTextEncoding() const
 959 {
 960     // GTK+ uses UTF-8 internally, we need to convert to it but from which
 961     // encoding?
 962
 963     // first check the default text style (we intentionally don't check the
 964     // style for the current position as it doesn't make sense for SetValue())
 965     const wxTextAttr& style = GetDefaultStyle();
 966     wxFontEncoding enc = style.HasFontEncoding() ? style.GetFontEncoding()
 967                                          : wxFONTENCODING_SYSTEM;
 968
 969     // fall back to the controls font if no style
 970     if ( enc == wxFONTENCODING_SYSTEM && m_hasFont )
 971         enc = GetFont().GetEncoding();
 972
 973     return enc;
 974 }
 975
 976 bool wxTextCtrl::IsEmpty() const
 977 {
 978     if ( IsMultiLine() )
 979         return gtk_text_buffer_get_char_count(m_buffer) == 0;
 980
 981     return wxTextEntry::IsEmpty();
 982 }
 983
 984 void wxTextCtrl::DoSetValue( const wxString &value, int flags )
 985 {
 986     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
 987
 988     m_modified = false;
 989
 990     if ( !IsMultiLine() )
 991     {
 992         wxTextEntry::DoSetValue(value, flags);
 993         return;
 994     }
 995
 996     wxFontEncoding enc = m_defaultStyle.HasFont()
 997                             ? m_defaultStyle.GetFont().GetEncoding()
 998                             : wxFONTENCODING_SYSTEM;
 999     if ( enc == wxFONTENCODING_SYSTEM )
1000         enc = GetTextEncoding();
1001
1002     const wxCharBuffer buffer(wxGTK_CONV_ENC(value, enc));
1003     if ( !buffer )
1004     {
1005         // see comment in WriteText() as to why we must warn the user about
1006         // this
1007         wxLogWarning(_("Failed to set text in the text control."));
1008         return;
1009     }
1010
1011     if ( !(flags & SetValue_SendEvent) )
1012     {
1013         EnableTextChangedEvents(false);
1014     }
1015
1016     gtk_text_buffer_set_text( m_buffer, buffer, strlen(buffer) );
1017
1018     if ( !m_defaultStyle.IsDefault() )
1019     {
1020         GtkTextIter start, end;
1021         gtk_text_buffer_get_bounds( m_buffer, &start, &end );
1022         wxGtkTextApplyTagsFromAttr(m_widget, m_buffer, m_defaultStyle,
1023                                    &start, &end);
1024     }
1025
1026     if ( !(flags & SetValue_SendEvent) )
1027     {
1028         EnableTextChangedEvents(true);
1029     }
1030
1031     // This was added after discussion on the list
1032     SetInsertionPoint(0);
1033 }
1034
1035 void wxTextCtrl::WriteText( const wxString &text )
1036 {
1037     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1038
1039     // we're changing the text programmatically
1040     DontMarkDirtyOnNextChange();
1041
1042     if ( !IsMultiLine() )
1043     {
1044         wxTextEntry::WriteText(text);
1045         return;
1046     }
1047
1048     // check if we have a specific style for the current position
1049     wxFontEncoding enc = wxFONTENCODING_SYSTEM;
1050     wxTextAttr style;
1051     if ( GetStyle(GetInsertionPoint(), style) && style.HasFontEncoding() )
1052     {
1053         enc = style.GetFontEncoding();
1054     }
1055
1056     if ( enc == wxFONTENCODING_SYSTEM )
1057         enc = GetTextEncoding();
1058
1059     const wxCharBuffer buffer(wxGTK_CONV_ENC(text, enc));
1060     if ( !buffer )
1061     {
1062         // we must log an error here as losing the text like this can be a
1063         // serious problem (e.g. imagine the document edited by user being
1064         // empty instead of containing the correct text)
1065         wxLogWarning(_("Failed to insert text in the control."));
1066         return;
1067     }
1068
1069     // First remove the selection if there is one
1070     // TODO:  Is there an easier GTK specific way to do this?
1071     long from, to;
1072     GetSelection(&from, &to);
1073     if (from != to)
1074         Remove(from, to);
1075
1076     // Insert the text
1077     wxGtkTextInsert( m_text, m_buffer, m_defaultStyle, buffer );
1078
1079     GtkAdjustment *adj = gtk_scrolled_window_get_vadjustment( GTK_SCROLLED_WINDOW(m_widget) );
1080     // Scroll to cursor, but only if scrollbar thumb is at the very bottom
1081     // won't work when frozen, text view is not using m_buffer then
1082     if (!IsFrozen() && wxIsSameDouble(adj->value, adj->upper - adj->page_size))
1083     {
1084         gtk_text_view_scroll_to_mark( GTK_TEXT_VIEW(m_text),
1085                 gtk_text_buffer_get_insert( m_buffer ), 0.0, FALSE, 0.0, 1.0 );
1086     }
1087 }
1088
1089 wxString wxTextCtrl::GetLineText( long lineNo ) const
1090 {
1091     wxString result;
1092     if ( IsMultiLine() )
1093     {
1094         GtkTextIter line;
1095         gtk_text_buffer_get_iter_at_line(m_buffer,&line,lineNo);
1096
1097         GtkTextIter end = line;
1098         // avoid skipping to the next line end if this one is empty
1099         if ( !gtk_text_iter_ends_line(&line) )
1100             gtk_text_iter_forward_to_line_end(&end);
1101
1102         wxGtkString text(gtk_text_buffer_get_text(m_buffer, &line, &end, true));
1103         result = wxGTK_CONV_BACK(text);
1104     }
1105     else
1106     {
1107         if (lineNo == 0)
1108             result = GetValue();
1109     }
1110     return result;
1111 }
1112
1113 void wxTextCtrl::OnDropFiles( wxDropFilesEvent &WXUNUSED(event) )
1114 {
1115   /* If you implement this, don't forget to update the documentation!
1116    * (file docs/latex/wx/text.tex) */
1117     wxFAIL_MSG( wxT("wxTextCtrl::OnDropFiles not implemented") );
1118 }
1119
1120 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y ) const
1121 {
1122     if ( IsMultiLine() )
1123     {
1124         GtkTextIter iter;
1125
1126         if (pos > GetLastPosition())
1127             return false;
1128
1129         gtk_text_buffer_get_iter_at_offset(m_buffer, &iter, pos);
1130
1131         if ( y )
1132             *y = gtk_text_iter_get_line(&iter);
1133         if ( x )
1134             *x = gtk_text_iter_get_line_offset(&iter);
1135     }
1136     else // single line control
1137     {
1138         if ( pos <= GTK_ENTRY(m_text)->text_length )
1139         {
1140             if ( y )
1141                 *y = 0;
1142             if ( x )
1143                 *x = pos;
1144         }
1145         else
1146         {
1147             // index out of bounds
1148             return false;
1149         }
1150     }
1151
1152     return true;
1153 }
1154
1155 long wxTextCtrl::XYToPosition(long x, long y ) const
1156 {
1157     if ( IsSingleLine() )
1158         return 0;
1159
1160     GtkTextIter iter;
1161     if (y >= gtk_text_buffer_get_line_count (m_buffer))
1162         return -1;
1163
1164     gtk_text_buffer_get_iter_at_line(m_buffer, &iter, y);
1165     if (x >= gtk_text_iter_get_chars_in_line (&iter))
1166         return -1;
1167
1168     return gtk_text_iter_get_offset(&iter) + x;
1169 }
1170
1171 int wxTextCtrl::GetLineLength(long lineNo) const
1172 {
1173     if ( IsMultiLine() )
1174     {
1175         int last_line = gtk_text_buffer_get_line_count( m_buffer ) - 1;
1176         if (lineNo > last_line)
1177             return -1;
1178
1179         GtkTextIter iter;
1180         gtk_text_buffer_get_iter_at_line(m_buffer, &iter, lineNo);
1181         // get_chars_in_line return includes paragraph delimiters, so need to subtract 1 IF it is not the last line
1182         return gtk_text_iter_get_chars_in_line(&iter) - ((lineNo == last_line) ? 0 : 1);
1183     }
1184     else
1185     {
1186         wxString str = GetLineText (lineNo);
1187         return (int) str.length();
1188     }
1189 }
1190
1191 int wxTextCtrl::GetNumberOfLines() const
1192 {
1193     if ( IsMultiLine() )
1194     {
1195         return gtk_text_buffer_get_line_count( m_buffer );
1196     }
1197     else // single line
1198     {
1199         return 1;
1200     }
1201 }
1202
1203 void wxTextCtrl::SetInsertionPoint( long pos )
1204 {
1205     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1206
1207     if ( IsMultiLine() )
1208     {
1209         GtkTextIter iter;
1210         gtk_text_buffer_get_iter_at_offset( m_buffer, &iter, pos );
1211         gtk_text_buffer_place_cursor( m_buffer, &iter );
1212         GtkTextMark* mark = gtk_text_buffer_get_insert(m_buffer);
1213         if (IsFrozen())
1214             // defer until Thaw, text view is not using m_buffer now
1215             m_showPositionOnThaw = mark;
1216         else
1217             gtk_text_view_scroll_mark_onscreen(GTK_TEXT_VIEW(m_text), mark);
1218     }
1219     else // single line
1220     {
1221         wxTextEntry::SetInsertionPoint(pos);
1222     }
1223 }
1224
1225 void wxTextCtrl::SetEditable( bool editable )
1226 {
1227     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1228
1229     if ( IsMultiLine() )
1230     {
1231         gtk_text_view_set_editable( GTK_TEXT_VIEW(m_text), editable );
1232     }
1233     else // single line
1234     {
1235         wxTextEntry::SetEditable(editable);
1236     }
1237 }
1238
1239 bool wxTextCtrl::Enable( bool enable )
1240 {
1241     if (!wxWindowBase::Enable(enable))
1242     {
1243         // nothing to do
1244         return false;
1245     }
1246
1247     gtk_widget_set_sensitive( m_text, enable );
1248
1249     return true;
1250 }
1251
1252 // wxGTK-specific: called recursively by Enable,
1253 // to give widgets an opportunity to correct their colours after they
1254 // have been changed by Enable
1255 void wxTextCtrl::OnEnabled(bool WXUNUSED(enable))
1256 {
1257     // If we have a custom background colour, we use this colour in both
1258     // disabled and enabled mode, or we end up with a different colour under the
1259     // text.
1260     wxColour oldColour = GetBackgroundColour();
1261     if (oldColour.Ok())
1262     {
1263         // Need to set twice or it'll optimize the useful stuff out
1264         if (oldColour == * wxWHITE)
1265             SetBackgroundColour(*wxBLACK);
1266         else
1267             SetBackgroundColour(*wxWHITE);
1268         SetBackgroundColour(oldColour);
1269     }
1270 }
1271
1272 void wxTextCtrl::MarkDirty()
1273 {
1274     m_modified = true;
1275 }
1276
1277 void wxTextCtrl::DiscardEdits()
1278 {
1279     m_modified = false;
1280 }
1281
1282 // ----------------------------------------------------------------------------
1283 // event handling
1284 // ----------------------------------------------------------------------------
1285
1286 void wxTextCtrl::EnableTextChangedEvents(bool enable)
1287 {
1288     if ( enable )
1289     {
1290         g_signal_handlers_unblock_by_func(GetTextObject(),
1291             (gpointer)gtk_text_changed_callback, this);
1292     }
1293     else // disable events
1294     {
1295         g_signal_handlers_block_by_func(GetTextObject(),
1296             (gpointer)gtk_text_changed_callback, this);
1297     }
1298 }
1299
1300 bool wxTextCtrl::IgnoreTextUpdate()
1301 {
1302     if ( m_countUpdatesToIgnore > 0 )
1303     {
1304         m_countUpdatesToIgnore--;
1305
1306         return true;
1307     }
1308
1309     return false;
1310 }
1311
1312 bool wxTextCtrl::MarkDirtyOnChange()
1313 {
1314     if ( m_dontMarkDirty )
1315     {
1316         m_dontMarkDirty = false;
1317
1318         return false;
1319     }
1320
1321     return true;
1322 }
1323
1324 void wxTextCtrl::SetSelection( long from, long to )
1325 {
1326     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1327
1328     if (from == -1 && to == -1)
1329     {
1330         from = 0;
1331         to = GetValue().length();
1332     }
1333
1334     if ( IsMultiLine() )
1335     {
1336         GtkTextIter fromi, toi;
1337         gtk_text_buffer_get_iter_at_offset( m_buffer, &fromi, from );
1338         gtk_text_buffer_get_iter_at_offset( m_buffer, &toi, to );
1339
1340         gtk_text_buffer_place_cursor( m_buffer, &toi );
1341         gtk_text_buffer_move_mark_by_name( m_buffer, "selection_bound", &fromi );
1342     }
1343     else // single line
1344     {
1345         wxTextEntry::SetSelection(from, to);
1346     }
1347 }
1348
1349 void wxTextCtrl::ShowPosition( long pos )
1350 {
1351     if (IsMultiLine())
1352     {
1353         GtkTextIter iter;
1354         gtk_text_buffer_get_iter_at_offset(m_buffer, &iter, int(pos));
1355         GtkTextMark* mark = gtk_text_buffer_get_mark(m_buffer, "ShowPosition");
1356         gtk_text_buffer_move_mark(m_buffer, mark, &iter);
1357         if (IsFrozen())
1358             // defer until Thaw, text view is not using m_buffer now
1359             m_showPositionOnThaw = mark;
1360         else
1361             gtk_text_view_scroll_mark_onscreen(GTK_TEXT_VIEW(m_text), mark);
1362     }
1363 }
1364
1365 wxTextCtrlHitTestResult
1366 wxTextCtrl::HitTest(const wxPoint& pt, long *pos) const
1367 {
1368     if ( !IsMultiLine() )
1369     {
1370         // not supported
1371         return wxTE_HT_UNKNOWN;
1372     }
1373
1374     int x, y;
1375     gtk_text_view_window_to_buffer_coords
1376     (
1377         GTK_TEXT_VIEW(m_text),
1378         GTK_TEXT_WINDOW_TEXT,
1379         pt.x, pt.y,
1380         &x, &y
1381     );
1382
1383     GtkTextIter iter;
1384     gtk_text_view_get_iter_at_location(GTK_TEXT_VIEW(m_text), &iter, x, y);
1385     if ( pos )
1386         *pos = gtk_text_iter_get_offset(&iter);
1387
1388     return wxTE_HT_ON_TEXT;
1389 }
1390
1391 long wxTextCtrl::GetInsertionPoint() const
1392 {
1393     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
1394
1395     if ( IsMultiLine() )
1396     {
1397         // There is no direct accessor for the cursor, but
1398         // internally, the cursor is the "mark" called
1399         // "insert" in the text view's btree structure.
1400
1401         GtkTextMark *mark = gtk_text_buffer_get_insert( m_buffer );
1402         GtkTextIter cursor;
1403         gtk_text_buffer_get_iter_at_mark( m_buffer, &cursor, mark );
1404
1405         return gtk_text_iter_get_offset( &cursor );
1406     }
1407     else
1408     {
1409         return wxTextEntry::GetInsertionPoint();
1410     }
1411 }
1412
1413 wxTextPos wxTextCtrl::GetLastPosition() const
1414 {
1415     wxCHECK_MSG( m_text != NULL, 0, wxT("invalid text ctrl") );
1416
1417     int pos = 0;
1418
1419     if ( IsMultiLine() )
1420     {
1421         GtkTextIter end;
1422         gtk_text_buffer_get_end_iter( m_buffer, &end );
1423
1424         pos = gtk_text_iter_get_offset( &end );
1425     }
1426     else // single line
1427     {
1428         pos = wxTextEntry::GetLastPosition();
1429     }
1430
1431     return (long)pos;
1432 }
1433
1434 void wxTextCtrl::Remove( long from, long to )
1435 {
1436     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1437
1438     if ( IsMultiLine() )
1439     {
1440         GtkTextIter fromi, toi;
1441         gtk_text_buffer_get_iter_at_offset( m_buffer, &fromi, from );
1442         gtk_text_buffer_get_iter_at_offset( m_buffer, &toi, to );
1443
1444         gtk_text_buffer_delete( m_buffer, &fromi, &toi );
1445     }
1446     else // single line
1447     {
1448         wxTextEntry::Remove(from, to);
1449     }
1450 }
1451
1452 void wxTextCtrl::Cut()
1453 {
1454     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1455
1456     if ( IsMultiLine() )
1457         g_signal_emit_by_name (m_text, "cut-clipboard");
1458     else
1459         wxTextEntry::Cut();
1460 }
1461
1462 void wxTextCtrl::Copy()
1463 {
1464     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1465
1466     if ( IsMultiLine() )
1467         g_signal_emit_by_name (m_text, "copy-clipboard");
1468     else
1469         wxTextEntry::Copy();
1470 }
1471
1472 void wxTextCtrl::Paste()
1473 {
1474     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1475
1476     if ( IsMultiLine() )
1477         g_signal_emit_by_name (m_text, "paste-clipboard");
1478     else
1479         wxTextEntry::Paste();
1480 }
1481
1482 // If the return values from and to are the same, there is no
1483 // selection.
1484 void wxTextCtrl::GetSelection(long* fromOut, long* toOut) const
1485 {
1486     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1487
1488     if ( !IsMultiLine() )
1489     {
1490         wxTextEntry::GetSelection(fromOut, toOut);
1491         return;
1492     }
1493
1494     gint from, to;
1495
1496     GtkTextIter ifrom, ito;
1497     if ( gtk_text_buffer_get_selection_bounds(m_buffer, &ifrom, &ito) )
1498     {
1499         from = gtk_text_iter_get_offset(&ifrom);
1500         to = gtk_text_iter_get_offset(&ito);
1501
1502         if ( from > to )
1503         {
1504             // exchange them to be compatible with wxMSW
1505             gint tmp = from;
1506             from = to;
1507             to = tmp;
1508         }
1509     }
1510     else // no selection
1511     {
1512         from =
1513         to = GetInsertionPoint();
1514     }
1515
1516     if ( fromOut )
1517         *fromOut = from;
1518     if ( toOut )
1519         *toOut = to;
1520 }
1521
1522
1523 bool wxTextCtrl::IsEditable() const
1524 {
1525     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1526
1527     if ( IsMultiLine() )
1528     {
1529         return gtk_text_view_get_editable(GTK_TEXT_VIEW(m_text));
1530     }
1531     else
1532     {
1533         return wxTextEntry::IsEditable();
1534     }
1535 }
1536
1537 bool wxTextCtrl::IsModified() const
1538 {
1539     return m_modified;
1540 }
1541
1542 void wxTextCtrl::OnChar( wxKeyEvent &key_event )
1543 {
1544     wxCHECK_RET( m_text != NULL, wxT("invalid text ctrl") );
1545
1546     if ( key_event.GetKeyCode() == WXK_RETURN )
1547     {
1548         if ( HasFlag(wxTE_PROCESS_ENTER) )
1549         {
1550             wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1551             event.SetEventObject(this);
1552             event.SetString(GetValue());
1553             if ( GetEventHandler()->ProcessEvent(event) )
1554                 return;
1555         }
1556     }
1557
1558     key_event.Skip();
1559 }
1560
1561 GtkWidget* wxTextCtrl::GetConnectWidget()
1562 {
1563     return GTK_WIDGET(m_text);
1564 }
1565
1566 GdkWindow *wxTextCtrl::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
1567 {
1568     if ( IsMultiLine() )
1569     {
1570         return gtk_text_view_get_window(GTK_TEXT_VIEW(m_text),
1571                                         GTK_TEXT_WINDOW_TEXT );
1572     }
1573     else
1574     {
1575         return GTK_ENTRY(m_text)->text_area;
1576     }
1577 }
1578
1579 // the font will change for subsequent text insertiongs
1580 bool wxTextCtrl::SetFont( const wxFont &font )
1581 {
1582     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1583
1584     if ( !wxTextCtrlBase::SetFont(font) )
1585     {
1586         // font didn't change, nothing to do
1587         return false;
1588     }
1589
1590     if ( IsMultiLine() )
1591     {
1592         SetUpdateFont(true);
1593
1594         m_defaultStyle.SetFont(font);
1595
1596         ChangeFontGlobally();
1597     }
1598
1599     return true;
1600 }
1601
1602 void wxTextCtrl::ChangeFontGlobally()
1603 {
1604     // this method is very inefficient and hence should be called as rarely as
1605     // possible!
1606     //
1607     // TODO: it can be implemented much more efficiently for GTK2
1608     wxASSERT_MSG( IsMultiLine(),
1609                   _T("shouldn't be called for single line controls") );
1610
1611     wxString value = GetValue();
1612     if ( !value.empty() )
1613     {
1614         SetUpdateFont(false);
1615
1616         Clear();
1617         AppendText(value);
1618     }
1619 }
1620
1621 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1622 {
1623     if ( !wxControl::SetForegroundColour(colour) )
1624         return false;
1625
1626     // update default fg colour too
1627     m_defaultStyle.SetTextColour(colour);
1628
1629     return true;
1630 }
1631
1632 bool wxTextCtrl::SetBackgroundColour( const wxColour &colour )
1633 {
1634     wxCHECK_MSG( m_text != NULL, false, wxT("invalid text ctrl") );
1635
1636     if ( !wxControl::SetBackgroundColour( colour ) )
1637         return false;
1638
1639     if (!m_backgroundColour.Ok())
1640         return false;
1641
1642     // change active background color too
1643     m_defaultStyle.SetBackgroundColour( colour );
1644
1645     return true;
1646 }
1647
1648 bool wxTextCtrl::SetStyle( long start, long end, const wxTextAttr& style )
1649 {
1650     if ( IsMultiLine() )
1651     {
1652         if ( style.IsDefault() )
1653         {
1654             // nothing to do
1655             return true;
1656         }
1657
1658         gint l = gtk_text_buffer_get_char_count( m_buffer );
1659
1660         wxCHECK_MSG( start >= 0 && end <= l, false,
1661                      _T("invalid range in wxTextCtrl::SetStyle") );
1662
1663         GtkTextIter starti, endi;
1664         gtk_text_buffer_get_iter_at_offset( m_buffer, &starti, start );
1665         gtk_text_buffer_get_iter_at_offset( m_buffer, &endi, end );
1666
1667         wxGtkTextApplyTagsFromAttr( m_widget, m_buffer, style, &starti, &endi );
1668
1669         return true;
1670     }
1671     //else: single line text controls don't support styles
1672
1673     return false;
1674 }
1675
1676 void wxTextCtrl::DoApplyWidgetStyle(GtkRcStyle *style)
1677 {
1678     gtk_widget_modify_style(m_text, style);
1679 }
1680
1681 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1682 {
1683     Cut();
1684 }
1685
1686 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1687 {
1688     Copy();
1689 }
1690
1691 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1692 {
1693     Paste();
1694 }
1695
1696 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1697 {
1698     Undo();
1699 }
1700
1701 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1702 {
1703     Redo();
1704 }
1705
1706 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1707 {
1708     event.Enable( CanCut() );
1709 }
1710
1711 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1712 {
1713     event.Enable( CanCopy() );
1714 }
1715
1716 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1717 {
1718     event.Enable( CanPaste() );
1719 }
1720
1721 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1722 {
1723     event.Enable( CanUndo() );
1724 }
1725
1726 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1727 {
1728     event.Enable( CanRedo() );
1729 }
1730
1731 wxSize wxTextCtrl::DoGetBestSize() const
1732 {
1733     // FIXME should be different for multi-line controls...
1734     wxSize ret( wxControl::DoGetBestSize() );
1735     wxSize best(80, ret.y);
1736     CacheBestSize(best);
1737     return best;
1738 }
1739
1740 // ----------------------------------------------------------------------------
1741 // freeze/thaw
1742 // ----------------------------------------------------------------------------
1743
1744 void wxTextCtrl::Freeze()
1745 {
1746     wxCHECK_RET(m_text != NULL, wxT("invalid text ctrl"));
1747
1748     if ( HasFlag(wxTE_MULTILINE) )
1749     {
1750         if (m_freezeCount++ == 0)
1751         {
1752             // freeze textview updates and remove buffer
1753             g_signal_connect (m_text, "expose_event",
1754                               G_CALLBACK (gtk_text_exposed_callback), this);
1755             g_signal_connect (m_widget, "expose_event",
1756                               G_CALLBACK (gtk_text_exposed_callback), this);
1757             gtk_widget_set_sensitive(m_widget, false);
1758             g_object_ref(m_buffer);
1759             GtkTextBuffer* buf_new = gtk_text_buffer_new(NULL);
1760             GtkTextMark* mark = GTK_TEXT_VIEW(m_text)->first_para_mark;
1761             gtk_text_view_set_buffer(GTK_TEXT_VIEW(m_text), buf_new);
1762             // gtk_text_view_set_buffer adds its own reference
1763             g_object_unref(buf_new);
1764             // This mark should be deleted when the buffer is changed,
1765             // but it's not (in GTK+ up to at least 2.10.6).
1766             // Otherwise these anonymous marks start to build up in the buffer,
1767             // and Freeze takes longer and longer each time it is called.
1768             if (GTK_IS_TEXT_MARK(mark) && !gtk_text_mark_get_deleted(mark))
1769                 gtk_text_buffer_delete_mark(m_buffer, mark);
1770         }
1771     }
1772 }
1773
1774 void wxTextCtrl::Thaw()
1775 {
1776     if ( HasFlag(wxTE_MULTILINE) )
1777     {
1778         wxCHECK_RET(m_freezeCount != 0, _T("Thaw() without matching Freeze()"));
1779
1780         if (--m_freezeCount == 0)
1781         {
1782             // Reattach buffer and thaw textview updates
1783             gtk_text_view_set_buffer(GTK_TEXT_VIEW(m_text), m_buffer);
1784             g_object_unref(m_buffer);
1785             gtk_widget_set_sensitive(m_widget, true);
1786             g_signal_handlers_disconnect_by_func (m_widget,
1787                     (gpointer) gtk_text_exposed_callback, this);
1788             g_signal_handlers_disconnect_by_func (m_text,
1789                     (gpointer) gtk_text_exposed_callback, this);
1790             if (m_showPositionOnThaw != NULL)
1791             {
1792                 gtk_text_view_scroll_mark_onscreen(
1793                     GTK_TEXT_VIEW(m_text), m_showPositionOnThaw);
1794                 m_showPositionOnThaw = NULL;
1795             }
1796         }
1797     }
1798 }
1799
1800 // ----------------------------------------------------------------------------
1801 // wxTextUrlEvent passing if style & wxTE_AUTO_URL
1802 // ----------------------------------------------------------------------------
1803
1804 // FIXME: when dragging on a link the sample gets an "Unknown event".
1805 // This might be an excessive event from us or a buggy wxMouseEvent::Moving() or
1806 // a buggy sample, or something else
1807 void wxTextCtrl::OnUrlMouseEvent(wxMouseEvent& event)
1808 {
1809     event.Skip();
1810     if( !HasFlag(wxTE_AUTO_URL) )
1811         return;
1812
1813     gint x, y;
1814     GtkTextIter start, end;
1815     GtkTextTag *tag = gtk_text_tag_table_lookup(gtk_text_buffer_get_tag_table(m_buffer),
1816                                                 "wxUrl");
1817
1818     gtk_text_view_window_to_buffer_coords(GTK_TEXT_VIEW(m_text), GTK_TEXT_WINDOW_WIDGET,
1819                                           event.GetX(), event.GetY(), &x, &y);
1820
1821     gtk_text_view_get_iter_at_location(GTK_TEXT_VIEW(m_text), &end, x, y);
1822     if (!gtk_text_iter_has_tag(&end, tag))
1823     {
1824         gdk_window_set_cursor(gtk_text_view_get_window(GTK_TEXT_VIEW(m_text),
1825                               GTK_TEXT_WINDOW_TEXT), m_gdkXTermCursor);
1826         return;
1827     }
1828
1829     gdk_window_set_cursor(gtk_text_view_get_window(GTK_TEXT_VIEW(m_text),
1830                           GTK_TEXT_WINDOW_TEXT), m_gdkHandCursor);
1831
1832     start = end;
1833     if(!gtk_text_iter_begins_tag(&start, tag))
1834         gtk_text_iter_backward_to_tag_toggle(&start, tag);
1835     if(!gtk_text_iter_ends_tag(&end, tag))
1836         gtk_text_iter_forward_to_tag_toggle(&end, tag);
1837
1838     // Native context menu is probably not desired on an URL.
1839     // Consider making this dependant on ProcessEvent(wxTextUrlEvent) return value
1840     if(event.GetEventType() == wxEVT_RIGHT_DOWN)
1841         event.Skip(false);
1842
1843     wxTextUrlEvent url_event(m_windowId, event,
1844                              gtk_text_iter_get_offset(&start),
1845                              gtk_text_iter_get_offset(&end));
1846
1847     InitCommandEvent(url_event);
1848     // Is that a good idea? Seems not (pleasure with gtk_text_view_start_selection_drag)
1849     //event.Skip(!GetEventHandler()->ProcessEvent(url_event));
1850     GetEventHandler()->ProcessEvent(url_event);
1851 }
1852
1853 bool wxTextCtrl::GTKProcessEvent(wxEvent& event) const
1854 {
1855     bool rc = wxTextCtrlBase::GTKProcessEvent(event);
1856
1857     // GtkTextView starts a drag operation when left mouse button is pressed
1858     // and ends it when it is released and if it doesn't get the release event
1859     // the next click on a control results in an assertion failure inside
1860     // gtk_text_view_start_selection_drag() which simply *kills* the program
1861     // without anything we can do about it, so always let GTK+ have this event
1862     return rc && (IsSingleLine() || event.GetEventType() != wxEVT_LEFT_UP);
1863 }
1864
1865 // static
1866 wxVisualAttributes
1867 wxTextCtrl::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1868 {
1869     return GetDefaultAttributesFromGTKWidget(gtk_entry_new, true);
1870 }
1871
1872 #endif // wxUSE_TEXTCTRL