libempathy-gtk/empathy-chat-text-view.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  * Copyright (C) 2002-2007 Imendio AB
   4  * Copyright (C) 2008 Collabora Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public
  17  * License along with this program; if not, write to the
  18  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
  19  * Boston, MA  02110-1301  USA
  20  *
  21  * Authors: Mikael Hallendal <micke@imendio.com>
  22  *          Richard Hult <richard@imendio.com>
  23  *          Martyn Russell <martyn@imendio.com>
  24  *          Xavier Claessens <xclaesse@gmail.com>
  25  */
  26
  27 #include "config.h"
  28
  29 #include <sys/types.h>
  30 #include <string.h>
  31 #include <time.h>
  32
  33 #include <glib/gi18n-lib.h>
  34 #include <gtk/gtk.h>
  35
  36 #include <telepathy-glib/util.h>
  37
  38 #include <libempathy/empathy-utils.h>
  39
  40 #include "empathy-chat-text-view.h"
  41 #include "empathy-chat.h"
  42 #include "empathy-conf.h"
  43 #include "empathy-ui-utils.h"
  44 #include "empathy-smiley-manager.h"
  45 #include "empathy-string-parser.h"
  46
  47 #define DEBUG_FLAG EMPATHY_DEBUG_CHAT
  48 #include <libempathy/empathy-debug.h>
  49
  50 /* Number of seconds between timestamps when using normal mode, 5 minutes. */
  51 #define TIMESTAMP_INTERVAL 300
  52
  53 #define MAX_LINES 800
  54 #define MAX_SCROLL_TIME 0.4 /* seconds */
  55 #define SCROLL_DELAY 33     /* milliseconds */
  56
  57 #define GET_PRIV(obj) EMPATHY_GET_PRIV (obj, EmpathyChatTextView)
  58
  59 typedef struct {
  60         GtkTextBuffer        *buffer;
  61         guint                 scroll_timeout;
  62         GTimer               *scroll_time;
  63         GtkTextMark          *find_mark_previous;
  64         GtkTextMark          *find_mark_next;
  65         gboolean              find_wrapped;
  66         gboolean              find_last_direction;
  67         EmpathyContact       *last_contact;
  68         time_t                last_timestamp;
  69         gboolean              allow_scrolling;
  70         guint                 notify_system_fonts_id;
  71         EmpathySmileyManager *smiley_manager;
  72         gboolean              only_if_date;
  73 } EmpathyChatTextViewPriv;
  74
  75 static void chat_text_view_iface_init (EmpathyChatViewIface *iface);
  76
  77 static void chat_text_view_copy_clipboard (EmpathyChatView *view);
  78
  79 G_DEFINE_TYPE_WITH_CODE (EmpathyChatTextView, empathy_chat_text_view,
  80                          GTK_TYPE_TEXT_VIEW,
  81                          G_IMPLEMENT_INTERFACE (EMPATHY_TYPE_CHAT_VIEW,
  82                                                 chat_text_view_iface_init));
  83
  84 enum {
  85         PROP_0,
  86         PROP_LAST_CONTACT,
  87         PROP_ONLY_IF_DATE
  88 };
  89
  90 static gboolean
  91 chat_text_view_url_event_cb (GtkTextTag          *tag,
  92                              GObject             *object,
  93                              GdkEvent            *event,
  94                              GtkTextIter         *iter,
  95                              EmpathyChatTextView *view)
  96 {
  97         EmpathyChatTextViewPriv *priv;
  98         GtkTextIter              start, end;
  99         gchar                   *str;
 100
 101         priv = GET_PRIV (view);
 102
 103         /* If the link is being selected, don't do anything. */
 104         gtk_text_buffer_get_selection_bounds (priv->buffer, &start, &end);
 105         if (gtk_text_iter_get_offset (&start) != gtk_text_iter_get_offset (&end)) {
 106                 return FALSE;
 107         }
 108
 109         if (event->type == GDK_BUTTON_RELEASE && event->button.button == 1) {
 110                 start = end = *iter;
 111
 112                 if (gtk_text_iter_backward_to_tag_toggle (&start, tag) &&
 113                     gtk_text_iter_forward_to_tag_toggle (&end, tag)) {
 114                             str = gtk_text_buffer_get_text (priv->buffer,
 115                                                             &start,
 116                                                             &end,
 117                                                             FALSE);
 118
 119                             empathy_url_show (GTK_WIDGET (view), str);
 120                             g_free (str);
 121                     }
 122         }
 123
 124         return FALSE;
 125 }
 126
 127 static gboolean
 128 chat_text_view_event_cb (EmpathyChatTextView *view,
 129                          GdkEventMotion      *event,
 130                          GtkTextTag          *tag)
 131 {
 132         static GdkCursor  *hand = NULL;
 133         static GdkCursor  *beam = NULL;
 134         GtkTextWindowType  type;
 135         GtkTextIter        iter;
 136         GdkWindow         *win;
 137         gint               x, y, buf_x, buf_y;
 138
 139         type = gtk_text_view_get_window_type (GTK_TEXT_VIEW (view),
 140                                               event->window);
 141
 142         if (type != GTK_TEXT_WINDOW_TEXT) {
 143                 return FALSE;
 144         }
 145
 146         /* Get where the pointer really is. */
 147         win = gtk_text_view_get_window (GTK_TEXT_VIEW (view), type);
 148         if (!win) {
 149                 return FALSE;
 150         }
 151
 152         gdk_window_get_pointer (win, &x, &y, NULL);
 153
 154         /* Get the iter where the cursor is at */
 155         gtk_text_view_window_to_buffer_coords (GTK_TEXT_VIEW (view), type,
 156                                                x, y,
 157                                                &buf_x, &buf_y);
 158
 159         gtk_text_view_get_iter_at_location (GTK_TEXT_VIEW (view),
 160                                             &iter,
 161                                             buf_x, buf_y);
 162
 163         if (gtk_text_iter_has_tag (&iter, tag)) {
 164                 if (!hand) {
 165                         hand = gdk_cursor_new (GDK_HAND2);
 166                         beam = gdk_cursor_new (GDK_XTERM);
 167                 }
 168                 gdk_window_set_cursor (win, hand);
 169         } else {
 170                 if (!beam) {
 171                         beam = gdk_cursor_new (GDK_XTERM);
 172                 }
 173                 gdk_window_set_cursor (win, beam);
 174         }
 175
 176         return FALSE;
 177 }
 178
 179 static void
 180 chat_text_view_create_tags (EmpathyChatTextView *view)
 181 {
 182         EmpathyChatTextViewPriv *priv = GET_PRIV (view);
 183         GtkTextTag              *tag;
 184
 185         gtk_text_buffer_create_tag (priv->buffer, EMPATHY_CHAT_TEXT_VIEW_TAG_CUT, NULL);
 186         gtk_text_buffer_create_tag (priv->buffer, EMPATHY_CHAT_TEXT_VIEW_TAG_HIGHLIGHT, NULL);
 187         gtk_text_buffer_create_tag (priv->buffer, EMPATHY_CHAT_TEXT_VIEW_TAG_SPACING, NULL);
 188         gtk_text_buffer_create_tag (priv->buffer, EMPATHY_CHAT_TEXT_VIEW_TAG_TIME, NULL);
 189         gtk_text_buffer_create_tag (priv->buffer, EMPATHY_CHAT_TEXT_VIEW_TAG_ACTION, NULL);
 190         gtk_text_buffer_create_tag (priv->buffer, EMPATHY_CHAT_TEXT_VIEW_TAG_BODY, NULL);
 191         gtk_text_buffer_create_tag (priv->buffer, EMPATHY_CHAT_TEXT_VIEW_TAG_EVENT, NULL);
 192
 193         tag = gtk_text_buffer_create_tag (priv->buffer, EMPATHY_CHAT_TEXT_VIEW_TAG_LINK, NULL);
 194         g_signal_connect (tag, "event",
 195                           G_CALLBACK (chat_text_view_url_event_cb),
 196                           view);
 197
 198         g_signal_connect (view, "motion-notify-event",
 199                           G_CALLBACK (chat_text_view_event_cb),
 200                           tag);
 201 }
 202
 203 static void
 204 chat_text_view_system_font_update (EmpathyChatTextView *view)
 205 {
 206         PangoFontDescription *font_description = NULL;
 207         gchar                *font_name;
 208
 209         if (empathy_conf_get_string (empathy_conf_get (),
 210                                      "/desktop/gnome/interface/document_font_name",
 211                                      &font_name) && font_name) {
 212                                              font_description = pango_font_description_from_string (font_name);
 213                                              g_free (font_name);
 214                                      } else {
 215                                              font_description = NULL;
 216                                      }
 217
 218         gtk_widget_modify_font (GTK_WIDGET (view), font_description);
 219
 220         if (font_description) {
 221                 pango_font_description_free (font_description);
 222         }
 223 }
 224
 225 static void
 226 chat_text_view_notify_system_font_cb (EmpathyConf *conf,
 227                                       const gchar *key,
 228                                       gpointer     user_data)
 229 {
 230         EmpathyChatTextView *view = user_data;
 231
 232         chat_text_view_system_font_update (view);
 233 }
 234
 235 static void
 236 chat_text_view_open_address_cb (GtkMenuItem *menuitem, const gchar *url)
 237 {
 238         empathy_url_show (GTK_WIDGET (menuitem), url);
 239 }
 240
 241 static void
 242 chat_text_view_copy_address_cb (GtkMenuItem *menuitem, const gchar *url)
 243 {
 244         GtkClipboard *clipboard;
 245
 246         clipboard = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);
 247         gtk_clipboard_set_text (clipboard, url, -1);
 248
 249         clipboard = gtk_clipboard_get (GDK_SELECTION_PRIMARY);
 250         gtk_clipboard_set_text (clipboard, url, -1);
 251 }
 252
 253 static void
 254 chat_text_view_populate_popup (EmpathyChatTextView *view,
 255                                GtkMenu        *menu,
 256                                gpointer        user_data)
 257 {
 258         EmpathyChatTextViewPriv *priv;
 259         GtkTextTagTable    *table;
 260         GtkTextTag         *tag;
 261         gint                x, y;
 262         GtkTextIter         iter, start, end;
 263         GtkWidget          *item;
 264         gchar              *str = NULL;
 265
 266         priv = GET_PRIV (view);
 267
 268         /* Clear menu item */
 269         if (gtk_text_buffer_get_char_count (priv->buffer) > 0) {
 270                 item = gtk_separator_menu_item_new ();
 271                 gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
 272                 gtk_widget_show (item);
 273
 274                 item = gtk_image_menu_item_new_from_stock (GTK_STOCK_CLEAR, NULL);
 275                 gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
 276                 gtk_widget_show (item);
 277
 278                 g_signal_connect_swapped (item, "activate",
 279                                           G_CALLBACK (empathy_chat_view_clear),
 280                                           view);
 281         }
 282
 283         /* Link context menu items */
 284         table = gtk_text_buffer_get_tag_table (priv->buffer);
 285         tag = gtk_text_tag_table_lookup (table, EMPATHY_CHAT_TEXT_VIEW_TAG_LINK);
 286
 287         gtk_widget_get_pointer (GTK_WIDGET (view), &x, &y);
 288
 289         gtk_text_view_window_to_buffer_coords (GTK_TEXT_VIEW (view),
 290                                                GTK_TEXT_WINDOW_WIDGET,
 291                                                x, y,
 292                                                &x, &y);
 293
 294         gtk_text_view_get_iter_at_location (GTK_TEXT_VIEW (view), &iter, x, y);
 295
 296         start = end = iter;
 297
 298         if (gtk_text_iter_backward_to_tag_toggle (&start, tag) &&
 299             gtk_text_iter_forward_to_tag_toggle (&end, tag)) {
 300                     str = gtk_text_buffer_get_text (priv->buffer,
 301                                                     &start, &end, FALSE);
 302             }
 303
 304         if (EMP_STR_EMPTY (str)) {
 305                 g_free (str);
 306                 return;
 307         }
 308
 309         /* NOTE: Set data just to get the string freed when not needed. */
 310         g_object_set_data_full (G_OBJECT (menu),
 311                                 "url", str,
 312                                 (GDestroyNotify) g_free);
 313
 314         item = gtk_separator_menu_item_new ();
 315         gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
 316         gtk_widget_show (item);
 317
 318         item = gtk_menu_item_new_with_mnemonic (_("_Copy Link Address"));
 319         g_signal_connect (item, "activate",
 320                           G_CALLBACK (chat_text_view_copy_address_cb),
 321                           str);
 322         gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
 323         gtk_widget_show (item);
 324
 325         item = gtk_menu_item_new_with_mnemonic (_("_Open Link"));
 326         g_signal_connect (item, "activate",
 327                           G_CALLBACK (chat_text_view_open_address_cb),
 328                           str);
 329         gtk_menu_shell_prepend (GTK_MENU_SHELL (menu), item);
 330         gtk_widget_show (item);
 331 }
 332
 333 static gboolean
 334 chat_text_view_is_scrolled_down (EmpathyChatTextView *view)
 335 {
 336         GtkWidget *sw;
 337
 338         sw = gtk_widget_get_parent (GTK_WIDGET (view));
 339         if (GTK_IS_SCROLLED_WINDOW (sw)) {
 340                 GtkAdjustment *vadj;
 341                 gdouble value;
 342                 gdouble upper;
 343                 gdouble page_size;
 344
 345                 vadj = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (sw));
 346                 value = gtk_adjustment_get_value (vadj);
 347                 upper = gtk_adjustment_get_upper (vadj);
 348                 page_size = gtk_adjustment_get_page_size (vadj);
 349
 350                 if (value < upper - page_size) {
 351                         return FALSE;
 352                 }
 353         }
 354
 355         return TRUE;
 356 }
 357
 358 static void
 359 chat_text_view_maybe_trim_buffer (EmpathyChatTextView *view)
 360 {
 361         EmpathyChatTextViewPriv *priv;
 362         GtkTextIter         top, bottom;
 363         gint                line;
 364         gint                remove_;
 365         GtkTextTagTable    *table;
 366         GtkTextTag         *tag;
 367
 368         priv = GET_PRIV (view);
 369
 370         gtk_text_buffer_get_end_iter (priv->buffer, &bottom);
 371         line = gtk_text_iter_get_line (&bottom);
 372         if (line < MAX_LINES) {
 373                 return;
 374         }
 375
 376         remove_ = line - MAX_LINES;
 377         gtk_text_buffer_get_start_iter (priv->buffer, &top);
 378
 379         bottom = top;
 380         if (!gtk_text_iter_forward_lines (&bottom, remove_)) {
 381                 return;
 382         }
 383
 384         /* Track backwords to a place where we can safely cut, we don't do it in
 385           * the middle of a tag.
 386           */
 387         table = gtk_text_buffer_get_tag_table (priv->buffer);
 388         tag = gtk_text_tag_table_lookup (table, EMPATHY_CHAT_TEXT_VIEW_TAG_CUT);
 389         if (!tag) {
 390                 return;
 391         }
 392
 393         if (!gtk_text_iter_forward_to_tag_toggle (&bottom, tag)) {
 394                 return;
 395         }
 396
 397         if (!gtk_text_iter_equal (&top, &bottom)) {
 398                 gtk_text_buffer_delete (priv->buffer, &top, &bottom);
 399         }
 400 }
 401
 402 static void
 403 chat_text_view_append_timestamp (EmpathyChatTextView *view,
 404                                  time_t               timestamp,
 405                                  gboolean             show_date)
 406 {
 407         EmpathyChatTextViewPriv *priv = GET_PRIV (view);
 408         GtkTextIter              iter;
 409         gchar                   *tmp;
 410         GString                 *str;
 411
 412         str = g_string_new ("- ");
 413
 414         /* Append date if needed */
 415         if (show_date) {
 416                 GDate *date;
 417                 gchar  buf[256];
 418
 419                 date = g_date_new ();
 420                 g_date_set_time_t (date, timestamp);
 421                 /* Translators: timestamp displayed between conversations in
 422                  * chat windows (strftime format string) */
 423                 g_date_strftime (buf, 256, _("%A %B %d %Y"), date);
 424                 g_string_append (str, buf);
 425                 g_string_append (str, ", ");
 426                 g_date_free (date);
 427         }
 428
 429         /* Append time */
 430         tmp = empathy_time_to_string_local (timestamp, EMPATHY_TIME_FORMAT_DISPLAY_SHORT);
 431         g_string_append (str, tmp);
 432         g_free (tmp);
 433
 434         g_string_append (str, " -\n");
 435
 436         /* Insert the string in the buffer */
 437         empathy_chat_text_view_append_spacing (view);
 438         gtk_text_buffer_get_end_iter (priv->buffer, &iter);
 439         gtk_text_buffer_insert_with_tags_by_name (priv->buffer,
 440                                                   &iter,
 441                                                   str->str, -1,
 442                                                   EMPATHY_CHAT_TEXT_VIEW_TAG_TIME,
 443                                                   NULL);
 444
 445         priv->last_timestamp = timestamp;
 446
 447         g_string_free (str, TRUE);
 448 }
 449
 450 static void
 451 chat_text_maybe_append_date_and_time (EmpathyChatTextView *view,
 452                                       time_t               timestamp)
 453 {
 454         EmpathyChatTextViewPriv *priv = GET_PRIV (view);
 455         GDate                   *date, *last_date;
 456         gboolean                 append_date = FALSE;
 457         gboolean                 append_time = FALSE;
 458
 459         /* Get the date from last message */
 460         last_date = g_date_new ();
 461         g_date_set_time_t (last_date, priv->last_timestamp);
 462
 463         /* Get the date of the message we are appending */
 464         date = g_date_new ();
 465         g_date_set_time_t (date, timestamp);
 466
 467         /* If last message was from another day we append date and time */
 468         if (g_date_compare (date, last_date) > 0) {
 469                 append_date = TRUE;
 470                 append_time = TRUE;
 471         }
 472
 473         g_date_free (last_date);
 474         g_date_free (date);
 475
 476         /* If last message is 'old' append the time */
 477         if (timestamp - priv->last_timestamp >= TIMESTAMP_INTERVAL) {
 478                 append_time = TRUE;
 479         }
 480
 481         if (append_date || (!priv->only_if_date && append_time)) {
 482                 chat_text_view_append_timestamp (view, timestamp, append_date);
 483         }
 484 }
 485
 486 static void
 487 chat_text_view_size_allocate (GtkWidget     *widget,
 488                               GtkAllocation *alloc)
 489 {
 490         gboolean down;
 491
 492         down = chat_text_view_is_scrolled_down (EMPATHY_CHAT_TEXT_VIEW (widget));
 493
 494         GTK_WIDGET_CLASS (empathy_chat_text_view_parent_class)->size_allocate (widget, alloc);
 495
 496         if (down) {
 497                 GtkAdjustment *adj;
 498
 499                 adj = GTK_TEXT_VIEW (widget)->vadjustment;
 500                 gtk_adjustment_set_value (adj,
 501                                           gtk_adjustment_get_upper (adj) -
 502                                           gtk_adjustment_get_page_size (adj));
 503         }
 504 }
 505
 506 static gboolean
 507 chat_text_view_drag_motion (GtkWidget      *widget,
 508                             GdkDragContext *context,
 509                             gint            x,
 510                             gint            y,
 511                             guint           time_)
 512 {
 513         /* Don't handle drag motion, since we don't want the view to scroll as
 514          * the result of dragging something across it. */
 515
 516         return FALSE;
 517 }
 518
 519 static void
 520 chat_text_view_get_property (GObject    *object,
 521                              guint       param_id,
 522                              GValue     *value,
 523                              GParamSpec *pspec)
 524 {
 525         EmpathyChatTextViewPriv *priv = GET_PRIV (object);
 526
 527         switch (param_id) {
 528         case PROP_LAST_CONTACT:
 529                 g_value_set_object (value, priv->last_contact);
 530                 break;
 531         case PROP_ONLY_IF_DATE:
 532                 g_value_set_boolean (value, priv->only_if_date);
 533                 break;
 534         default:
 535                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 536                 break;
 537         };
 538 }
 539
 540 static void
 541 chat_text_view_set_property (GObject      *object,
 542                              guint         param_id,
 543                              const GValue *value,
 544                              GParamSpec   *pspec)
 545 {
 546         EmpathyChatTextViewPriv *priv = GET_PRIV (object);
 547
 548         switch (param_id) {
 549         case PROP_ONLY_IF_DATE:
 550                 priv->only_if_date = g_value_get_boolean (value);
 551                 break;
 552         default:
 553                 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 554                 break;
 555         };
 556 }
 557
 558 static void
 559 chat_text_view_finalize (GObject *object)
 560 {
 561         EmpathyChatTextView     *view;
 562         EmpathyChatTextViewPriv *priv;
 563
 564         view = EMPATHY_CHAT_TEXT_VIEW (object);
 565         priv = GET_PRIV (view);
 566
 567         DEBUG ("%p", object);
 568
 569         empathy_conf_notify_remove (empathy_conf_get (), priv->notify_system_fonts_id);
 570
 571         if (priv->last_contact) {
 572                 g_object_unref (priv->last_contact);
 573         }
 574         if (priv->scroll_time) {
 575                 g_timer_destroy (priv->scroll_time);
 576         }
 577         if (priv->scroll_timeout) {
 578                 g_source_remove (priv->scroll_timeout);
 579         }
 580         g_object_unref (priv->smiley_manager);
 581
 582         G_OBJECT_CLASS (empathy_chat_text_view_parent_class)->finalize (object);
 583 }
 584
 585 static void
 586 text_view_copy_clipboard (GtkTextView *text_view)
 587 {
 588         chat_text_view_copy_clipboard (EMPATHY_CHAT_VIEW (text_view));
 589 }
 590
 591 static void
 592 empathy_chat_text_view_class_init (EmpathyChatTextViewClass *klass)
 593 {
 594         GObjectClass   *object_class = G_OBJECT_CLASS (klass);
 595         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 596         GtkTextViewClass *text_view_class = GTK_TEXT_VIEW_CLASS (klass);
 597
 598         object_class->finalize = chat_text_view_finalize;
 599         object_class->get_property = chat_text_view_get_property;
 600         object_class->set_property = chat_text_view_set_property;
 601
 602         widget_class->size_allocate = chat_text_view_size_allocate;
 603         widget_class->drag_motion = chat_text_view_drag_motion;
 604
 605         text_view_class->copy_clipboard = text_view_copy_clipboard;
 606
 607         g_object_class_install_property (object_class,
 608                                          PROP_LAST_CONTACT,
 609                                          g_param_spec_object ("last-contact",
 610                                                               "Last contact",
 611                                                               "The sender of the last received message",
 612                                                               EMPATHY_TYPE_CONTACT,
 613                                                               G_PARAM_READABLE));
 614         g_object_class_install_property (object_class,
 615                                          PROP_ONLY_IF_DATE,
 616                                          g_param_spec_boolean ("only-if-date",
 617                                                               "Only if date",
 618                                                               "Display timestamp only if the date changes",
 619                                                               FALSE,
 620                                                               G_PARAM_READWRITE));
 621
 622
 623         g_type_class_add_private (object_class, sizeof (EmpathyChatTextViewPriv));
 624 }
 625
 626 static void
 627 empathy_chat_text_view_init (EmpathyChatTextView *view)
 628 {
 629         EmpathyChatTextViewPriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (view,
 630                 EMPATHY_TYPE_CHAT_TEXT_VIEW, EmpathyChatTextViewPriv);
 631
 632         view->priv = priv;
 633         priv->buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
 634         priv->last_timestamp = 0;
 635         priv->allow_scrolling = TRUE;
 636         priv->smiley_manager = empathy_smiley_manager_dup_singleton ();
 637
 638         g_object_set (view,
 639                       "wrap-mode", GTK_WRAP_WORD_CHAR,
 640                       "editable", FALSE,
 641                       "cursor-visible", FALSE,
 642                       NULL);
 643
 644         priv->notify_system_fonts_id =
 645                 empathy_conf_notify_add (empathy_conf_get (),
 646                                          "/desktop/gnome/interface/document_font_name",
 647                                          chat_text_view_notify_system_font_cb,
 648                                          view);
 649         chat_text_view_system_font_update (view);
 650         chat_text_view_create_tags (view);
 651
 652         g_signal_connect (view,
 653                           "populate-popup",
 654                           G_CALLBACK (chat_text_view_populate_popup),
 655                           NULL);
 656 }
 657
 658 /* Code stolen from pidgin/gtkimhtml.c */
 659 static gboolean
 660 chat_text_view_scroll_cb (EmpathyChatTextView *view)
 661 {
 662         EmpathyChatTextViewPriv *priv;
 663         GtkAdjustment      *adj;
 664         gdouble             max_val;
 665
 666         priv = GET_PRIV (view);
 667         adj = GTK_TEXT_VIEW (view)->vadjustment;
 668         max_val = gtk_adjustment_get_upper (adj) - gtk_adjustment_get_page_size (adj);
 669
 670         g_return_val_if_fail (priv->scroll_time != NULL, FALSE);
 671
 672         if (g_timer_elapsed (priv->scroll_time, NULL) > MAX_SCROLL_TIME) {
 673                 /* time's up. jump to the end and kill the timer */
 674                 gtk_adjustment_set_value (adj, max_val);
 675                 g_timer_destroy (priv->scroll_time);
 676                 priv->scroll_time = NULL;
 677                 priv->scroll_timeout = 0;
 678                 return FALSE;
 679         }
 680
 681         /* scroll by 1/3rd the remaining distance */
 682         gtk_adjustment_set_value (adj, gtk_adjustment_get_value (adj) + ((max_val - gtk_adjustment_get_value (adj)) / 3));
 683         return TRUE;
 684 }
 685
 686 static void
 687 chat_text_view_scroll_down (EmpathyChatView *view)
 688 {
 689         EmpathyChatTextViewPriv *priv = GET_PRIV (view);
 690
 691         g_return_if_fail (EMPATHY_IS_CHAT_TEXT_VIEW (view));
 692
 693         if (!priv->allow_scrolling) {
 694                 return;
 695         }
 696
 697         DEBUG ("Scrolling down");
 698
 699         if (priv->scroll_time) {
 700                 g_timer_reset (priv->scroll_time);
 701         } else {
 702                 priv->scroll_time = g_timer_new ();
 703         }
 704         if (!priv->scroll_timeout) {
 705                 priv->scroll_timeout = g_timeout_add (SCROLL_DELAY,
 706                                                       (GSourceFunc) chat_text_view_scroll_cb,
 707                                                       view);
 708         }
 709 }
 710
 711 static void
 712 chat_text_view_append_message (EmpathyChatView *view,
 713                                EmpathyMessage  *msg)
 714 {
 715         EmpathyChatTextView     *text_view = EMPATHY_CHAT_TEXT_VIEW (view);
 716         EmpathyChatTextViewPriv *priv = GET_PRIV (text_view);
 717         gboolean                 bottom;
 718         time_t                   timestamp;
 719
 720         g_return_if_fail (EMPATHY_IS_CHAT_TEXT_VIEW (view));
 721         g_return_if_fail (EMPATHY_IS_MESSAGE (msg));
 722
 723         if (!empathy_message_get_body (msg)) {
 724                 return;
 725         }
 726
 727         bottom = chat_text_view_is_scrolled_down (text_view);
 728
 729         chat_text_view_maybe_trim_buffer (EMPATHY_CHAT_TEXT_VIEW (view));
 730
 731         timestamp = empathy_message_get_timestamp (msg);
 732         chat_text_maybe_append_date_and_time (text_view, timestamp);
 733         if (EMPATHY_CHAT_TEXT_VIEW_GET_CLASS (view)->append_message) {
 734                 EMPATHY_CHAT_TEXT_VIEW_GET_CLASS (view)->append_message (text_view,
 735                                                                          msg);
 736         }
 737
 738         if (bottom) {
 739                 chat_text_view_scroll_down (view);
 740         }
 741
 742         if (priv->last_contact) {
 743                 g_object_unref (priv->last_contact);
 744         }
 745         priv->last_contact = g_object_ref (empathy_message_get_sender (msg));
 746         g_object_notify (G_OBJECT (view), "last-contact");
 747 }
 748
 749 static void
 750 chat_text_view_append_event (EmpathyChatView *view,
 751                              const gchar     *str)
 752 {
 753         EmpathyChatTextView     *text_view = EMPATHY_CHAT_TEXT_VIEW (view);
 754         EmpathyChatTextViewPriv *priv = GET_PRIV (text_view);
 755         gboolean                 bottom;
 756         GtkTextIter              iter;
 757         gchar                   *msg;
 758
 759
 760         g_return_if_fail (EMPATHY_IS_CHAT_TEXT_VIEW (view));
 761         g_return_if_fail (!EMP_STR_EMPTY (str));
 762
 763         bottom = chat_text_view_is_scrolled_down (text_view);
 764         chat_text_view_maybe_trim_buffer (EMPATHY_CHAT_TEXT_VIEW (view));
 765         chat_text_maybe_append_date_and_time (text_view,
 766                                               empathy_time_get_current ());
 767
 768         gtk_text_buffer_get_end_iter (priv->buffer, &iter);
 769         msg = g_strdup_printf (" - %s\n", str);
 770         gtk_text_buffer_insert_with_tags_by_name (priv->buffer, &iter,
 771                                                   msg, -1,
 772                                                   EMPATHY_CHAT_TEXT_VIEW_TAG_EVENT,
 773                                                   NULL);
 774         g_free (msg);
 775
 776         if (bottom) {
 777                 chat_text_view_scroll_down (view);
 778         }
 779
 780         if (priv->last_contact) {
 781                 g_object_unref (priv->last_contact);
 782                 priv->last_contact = NULL;
 783                 g_object_notify (G_OBJECT (view), "last-contact");
 784         }
 785 }
 786
 787 static void
 788 chat_text_view_scroll (EmpathyChatView *view,
 789                        gboolean         allow_scrolling)
 790 {
 791         EmpathyChatTextViewPriv *priv = GET_PRIV (view);
 792
 793         g_return_if_fail (EMPATHY_IS_CHAT_TEXT_VIEW (view));
 794
 795         DEBUG ("Scrolling %s", allow_scrolling ? "enabled" : "disabled");
 796
 797         priv->allow_scrolling = allow_scrolling;
 798         if (allow_scrolling) {
 799                 empathy_chat_view_scroll_down (view);
 800         }
 801 }
 802
 803 static gboolean
 804 chat_text_view_get_has_selection (EmpathyChatView *view)
 805 {
 806         GtkTextBuffer *buffer;
 807
 808         g_return_val_if_fail (EMPATHY_IS_CHAT_TEXT_VIEW (view), FALSE);
 809
 810         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
 811
 812         return gtk_text_buffer_get_has_selection (buffer);
 813 }
 814
 815 static void
 816 chat_text_view_clear (EmpathyChatView *view)
 817 {
 818         GtkTextBuffer      *buffer;
 819         EmpathyChatTextViewPriv *priv;
 820
 821         g_return_if_fail (EMPATHY_IS_CHAT_TEXT_VIEW (view));
 822
 823         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
 824         gtk_text_buffer_set_text (buffer, "", -1);
 825
 826         /* We set these back to the initial values so we get
 827           * timestamps when clearing the window to know when
 828           * conversations start.
 829           */
 830         priv = GET_PRIV (view);
 831
 832         priv->last_timestamp = 0;
 833         if (priv->last_contact) {
 834                 g_object_unref (priv->last_contact);
 835                 priv->last_contact = NULL;
 836         }
 837 }
 838
 839 static gboolean
 840 chat_text_view_find_previous (EmpathyChatView *view,
 841                                 const gchar     *search_criteria,
 842                                 gboolean         new_search,
 843                                 gboolean         match_case)
 844 {
 845         EmpathyChatTextViewPriv *priv;
 846         GtkTextBuffer      *buffer;
 847         GtkTextIter         iter_at_mark;
 848         GtkTextIter         iter_match_start;
 849         GtkTextIter         iter_match_end;
 850         gboolean            found;
 851         gboolean            from_start = FALSE;
 852
 853         g_return_val_if_fail (EMPATHY_IS_CHAT_TEXT_VIEW (view), FALSE);
 854         g_return_val_if_fail (search_criteria != NULL, FALSE);
 855
 856         priv = GET_PRIV (view);
 857
 858         buffer = priv->buffer;
 859
 860         if (EMP_STR_EMPTY (search_criteria)) {
 861                 if (priv->find_mark_previous) {
 862                         gtk_text_buffer_get_start_iter (buffer, &iter_at_mark);
 863
 864                         gtk_text_buffer_move_mark (buffer,
 865                                                    priv->find_mark_previous,
 866                                                    &iter_at_mark);
 867                         gtk_text_view_scroll_to_mark (GTK_TEXT_VIEW (view),
 868                                                       priv->find_mark_previous,
 869                                                       0.0,
 870                                                       TRUE,
 871                                                       0.0,
 872                                                       0.0);
 873                         gtk_text_buffer_select_range (buffer,
 874                                                       &iter_at_mark,
 875                                                       &iter_at_mark);
 876                 }
 877
 878                 return FALSE;
 879         }
 880
 881         if (new_search) {
 882                 from_start = TRUE;
 883         }
 884
 885         if (!new_search && priv->find_mark_previous) {
 886                 gtk_text_buffer_get_iter_at_mark (buffer,
 887                                                   &iter_at_mark,
 888                                                   priv->find_mark_previous);
 889         } else {
 890                 gtk_text_buffer_get_end_iter (buffer, &iter_at_mark);
 891                 from_start = TRUE;
 892         }
 893
 894         priv->find_last_direction = FALSE;
 895
 896         /* Use the standard GTK+ method for case sensitive searches. It can't do
 897          * case insensitive searches (see bug #61852), so keep the custom method
 898          * around for case insensitive searches. */
 899         if (match_case) {
 900                 found = gtk_text_iter_backward_search (&iter_at_mark,
 901                                                        search_criteria,
 902                                                        0, /* no text search flags, we want exact matches */
 903                                                        &iter_match_start,
 904                                                        &iter_match_end,
 905                                                        NULL);
 906         } else {
 907                 found = empathy_text_iter_backward_search (&iter_at_mark,
 908                                                            search_criteria,
 909                                                            &iter_match_start,
 910                                                            &iter_match_end,
 911                                                            NULL);
 912         }
 913
 914         if (!found) {
 915                 gboolean result = FALSE;
 916
 917                 if (from_start) {
 918                         return result;
 919                 }
 920
 921                 /* Here we wrap around. */
 922                 if (!new_search && !priv->find_wrapped) {
 923                         priv->find_wrapped = TRUE;
 924                         result = chat_text_view_find_previous (view,
 925                                                                  search_criteria,
 926                                                                  FALSE,
 927                                                                  match_case);
 928                         priv->find_wrapped = FALSE;
 929                 }
 930
 931                 return result;
 932         }
 933
 934         /* Set new mark and show on screen */
 935         if (!priv->find_mark_previous) {
 936                 priv->find_mark_previous = gtk_text_buffer_create_mark (buffer, NULL,
 937                                                                         &iter_match_start,
 938                                                                         TRUE);
 939         } else {
 940                 gtk_text_buffer_move_mark (buffer,
 941                                            priv->find_mark_previous,
 942                                            &iter_match_start);
 943         }
 944
 945         if (!priv->find_mark_next) {
 946                 priv->find_mark_next = gtk_text_buffer_create_mark (buffer, NULL,
 947                                                                     &iter_match_end,
 948                                                                     TRUE);
 949         } else {
 950                 gtk_text_buffer_move_mark (buffer,
 951                                            priv->find_mark_next,
 952                                            &iter_match_end);
 953         }
 954
 955         gtk_text_view_scroll_to_mark (GTK_TEXT_VIEW (view),
 956                                       priv->find_mark_previous,
 957                                       0.0,
 958                                       TRUE,
 959                                       0.5,
 960                                       0.5);
 961
 962         gtk_text_buffer_move_mark_by_name (buffer, "selection_bound", &iter_match_start);
 963         gtk_text_buffer_move_mark_by_name (buffer, "insert", &iter_match_end);
 964
 965         return TRUE;
 966 }
 967
 968 static gboolean
 969 chat_text_view_find_next (EmpathyChatView *view,
 970                             const gchar     *search_criteria,
 971                             gboolean         new_search,
 972                             gboolean         match_case)
 973 {
 974         EmpathyChatTextViewPriv *priv;
 975         GtkTextBuffer      *buffer;
 976         GtkTextIter         iter_at_mark;
 977         GtkTextIter         iter_match_start;
 978         GtkTextIter         iter_match_end;
 979         gboolean            found;
 980         gboolean            from_start = FALSE;
 981
 982         g_return_val_if_fail (EMPATHY_IS_CHAT_TEXT_VIEW (view), FALSE);
 983         g_return_val_if_fail (search_criteria != NULL, FALSE);
 984
 985         priv = GET_PRIV (view);
 986
 987         buffer = priv->buffer;
 988
 989         if (EMP_STR_EMPTY (search_criteria)) {
 990                 if (priv->find_mark_next) {
 991                         gtk_text_buffer_get_start_iter (buffer, &iter_at_mark);
 992
 993                         gtk_text_buffer_move_mark (buffer,
 994                                                    priv->find_mark_next,
 995                                                    &iter_at_mark);
 996                         gtk_text_view_scroll_to_mark (GTK_TEXT_VIEW (view),
 997                                                       priv->find_mark_next,
 998                                                       0.0,
 999                                                       TRUE,
1000                                                       0.0,
1001                                                       0.0);
1002                         gtk_text_buffer_select_range (buffer,
1003                                                       &iter_at_mark,
1004                                                       &iter_at_mark);
1005                 }
1006
1007                 return FALSE;
1008         }
1009
1010         if (new_search) {
1011                 from_start = TRUE;
1012         }
1013
1014         if (!new_search && priv->find_mark_next) {
1015                 gtk_text_buffer_get_iter_at_mark (buffer,
1016                                                   &iter_at_mark,
1017                                                   priv->find_mark_next);
1018         } else {
1019                 gtk_text_buffer_get_start_iter (buffer, &iter_at_mark);
1020                 from_start = TRUE;
1021         }
1022
1023         priv->find_last_direction = TRUE;
1024
1025         /* Use the standard GTK+ method for case sensitive searches. It can't do
1026          * case insensitive searches (see bug #61852), so keep the custom method
1027          * around for case insensitive searches. */
1028         if (match_case) {
1029                 found = gtk_text_iter_forward_search (&iter_at_mark,
1030                                                       search_criteria,
1031                                                       0,
1032                                                       &iter_match_start,
1033                                                       &iter_match_end,
1034                                                       NULL);
1035         } else {
1036                 found = empathy_text_iter_forward_search (&iter_at_mark,
1037                                                           search_criteria,
1038                                                           &iter_match_start,
1039                                                           &iter_match_end,
1040                                                           NULL);
1041         }
1042
1043         if (!found) {
1044                 gboolean result = FALSE;
1045
1046                 if (from_start) {
1047                         return result;
1048                 }
1049
1050                 /* Here we wrap around. */
1051                 if (!new_search && !priv->find_wrapped) {
1052                         priv->find_wrapped = TRUE;
1053                         result = chat_text_view_find_next (view,
1054                                                              search_criteria,
1055                                                              FALSE,
1056                                                              match_case);
1057                         priv->find_wrapped = FALSE;
1058                 }
1059
1060                 return result;
1061         }
1062
1063         /* Set new mark and show on screen */
1064         if (!priv->find_mark_next) {
1065                 priv->find_mark_next = gtk_text_buffer_create_mark (buffer, NULL,
1066                                                                     &iter_match_end,
1067                                                                     TRUE);
1068         } else {
1069                 gtk_text_buffer_move_mark (buffer,
1070                                            priv->find_mark_next,
1071                                            &iter_match_end);
1072         }
1073
1074         if (!priv->find_mark_previous) {
1075                 priv->find_mark_previous = gtk_text_buffer_create_mark (buffer, NULL,
1076                                                                         &iter_match_start,
1077                                                                         TRUE);
1078         } else {
1079                 gtk_text_buffer_move_mark (buffer,
1080                                            priv->find_mark_previous,
1081                                            &iter_match_start);
1082         }
1083
1084         gtk_text_view_scroll_to_mark (GTK_TEXT_VIEW (view),
1085                                       priv->find_mark_next,
1086                                       0.0,
1087                                       TRUE,
1088                                       0.5,
1089                                       0.5);
1090
1091         gtk_text_buffer_move_mark_by_name (buffer, "selection_bound", &iter_match_start);
1092         gtk_text_buffer_move_mark_by_name (buffer, "insert", &iter_match_end);
1093
1094         return TRUE;
1095 }
1096
1097 static void
1098 chat_text_view_find_abilities (EmpathyChatView *view,
1099                                  const gchar    *search_criteria,
1100                                  gboolean        match_case,
1101                                  gboolean       *can_do_previous,
1102                                  gboolean       *can_do_next)
1103 {
1104         EmpathyChatTextViewPriv *priv;
1105         GtkTextBuffer           *buffer;
1106         GtkTextIter              iter_at_mark;
1107         GtkTextIter              iter_match_start;
1108         GtkTextIter              iter_match_end;
1109
1110         g_return_if_fail (EMPATHY_IS_CHAT_TEXT_VIEW (view));
1111         g_return_if_fail (search_criteria != NULL);
1112         g_return_if_fail (can_do_previous != NULL && can_do_next != NULL);
1113
1114         priv = GET_PRIV (view);
1115
1116         buffer = priv->buffer;
1117
1118         if (can_do_previous) {
1119                 if (priv->find_mark_previous) {
1120                         gtk_text_buffer_get_iter_at_mark (buffer,
1121                                                           &iter_at_mark,
1122                                                           priv->find_mark_previous);
1123                 } else {
1124                         gtk_text_buffer_get_start_iter (buffer, &iter_at_mark);
1125                 }
1126
1127                 if (match_case) {
1128                         *can_do_previous = gtk_text_iter_backward_search (&iter_at_mark,
1129                                                                           search_criteria,
1130                                                                           0,
1131                                                                           &iter_match_start,
1132                                                                           &iter_match_end,
1133                                                                           NULL);
1134                 } else {
1135                         *can_do_previous = empathy_text_iter_backward_search (&iter_at_mark,
1136                                                                               search_criteria,
1137                                                                               &iter_match_start,
1138                                                                               &iter_match_end,
1139                                                                               NULL);
1140                 }
1141         }
1142
1143         if (can_do_next) {
1144                 if (priv->find_mark_next) {
1145                         gtk_text_buffer_get_iter_at_mark (buffer,
1146                                                           &iter_at_mark,
1147                                                           priv->find_mark_next);
1148                 } else {
1149                         gtk_text_buffer_get_start_iter (buffer, &iter_at_mark);
1150                 }
1151
1152                 if (match_case) {
1153                         *can_do_next = gtk_text_iter_forward_search (&iter_at_mark,
1154                                                                      search_criteria,
1155                                                                      0,
1156                                                                      &iter_match_start,
1157                                                                      &iter_match_end,
1158                                                                      NULL);
1159                 } else {
1160                         *can_do_next = empathy_text_iter_forward_search (&iter_at_mark,
1161                                                                          search_criteria,
1162                                                                          &iter_match_start,
1163                                                                          &iter_match_end,
1164                                                                          NULL);
1165                 }
1166         }
1167 }
1168
1169 static void
1170 chat_text_view_highlight (EmpathyChatView *view,
1171                             const gchar     *text,
1172                             gboolean         match_case)
1173 {
1174         GtkTextBuffer *buffer;
1175         GtkTextIter    iter;
1176         GtkTextIter    iter_start;
1177         GtkTextIter    iter_end;
1178         GtkTextIter    iter_match_start;
1179         GtkTextIter    iter_match_end;
1180         gboolean       found;
1181
1182         g_return_if_fail (EMPATHY_IS_CHAT_TEXT_VIEW (view));
1183
1184         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
1185
1186         gtk_text_buffer_get_start_iter (buffer, &iter);
1187
1188         gtk_text_buffer_get_bounds (buffer, &iter_start, &iter_end);
1189         gtk_text_buffer_remove_tag_by_name (buffer, EMPATHY_CHAT_TEXT_VIEW_TAG_HIGHLIGHT,
1190                                             &iter_start,
1191                                             &iter_end);
1192
1193         if (EMP_STR_EMPTY (text)) {
1194                 return;
1195         }
1196
1197         while (1) {
1198                 if (match_case) {
1199                         found = gtk_text_iter_forward_search (&iter,
1200                                                               text,
1201                                                               0,
1202                                                               &iter_match_start,
1203                                                               &iter_match_end,
1204                                                               NULL);
1205                 } else {
1206                         found = empathy_text_iter_forward_search (&iter,
1207                                                                   text,
1208                                                                   &iter_match_start,
1209                                                                   &iter_match_end,
1210                                                                   NULL);
1211                 }
1212                 if (!found) {
1213                         break;
1214                 }
1215
1216                 gtk_text_buffer_apply_tag_by_name (buffer, EMPATHY_CHAT_TEXT_VIEW_TAG_HIGHLIGHT,
1217                                                    &iter_match_start,
1218                                                    &iter_match_end);
1219
1220                 iter = iter_match_end;
1221         }
1222 }
1223
1224 static void
1225 chat_text_view_copy_clipboard (EmpathyChatView *view)
1226 {
1227         GtkTextBuffer *buffer;
1228         GtkTextIter start, iter, end;
1229         GtkClipboard  *clipboard;
1230         GdkPixbuf *pixbuf;
1231         gunichar c;
1232         GtkTextChildAnchor *anchor = NULL;
1233         GString *str;
1234         GList *list;
1235         gboolean ignore_newlines = FALSE;
1236
1237         g_return_if_fail (EMPATHY_IS_CHAT_TEXT_VIEW (view));
1238
1239         buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
1240         clipboard = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);
1241
1242         if (!gtk_text_buffer_get_selection_bounds (buffer, &start, &end))
1243                 return;
1244
1245         str = g_string_new ("");
1246
1247         for (iter = start; !gtk_text_iter_equal (&iter, &end); gtk_text_iter_forward_char (&iter)) {
1248                 c = gtk_text_iter_get_char (&iter);
1249                 /* 0xFFFC is the 'object replacement' unicode character,
1250                  * it indicates the presence of a pixbuf or a widget. */
1251                 if (c == 0xFFFC) {
1252                         ignore_newlines = FALSE;
1253                         if ((pixbuf = gtk_text_iter_get_pixbuf (&iter))) {
1254                                 gchar *text;
1255                                 text = g_object_get_data (G_OBJECT(pixbuf),
1256                                                           "smiley_str");
1257                                 if (text)
1258                                         str = g_string_append (str, text);
1259                         } else if ((anchor = gtk_text_iter_get_child_anchor (&iter))) {
1260                                 gchar *text;
1261                                 list = gtk_text_child_anchor_get_widgets (anchor);
1262                                 if (list) {
1263                                         text = g_object_get_data (G_OBJECT(list->data),
1264                                                                   "str_obj");
1265                                         if (text)
1266                                                 str = g_string_append (str, text);
1267                                 }
1268                                 g_list_free (list);
1269                         }
1270                 } else if (c == '\n') {
1271                         if (!ignore_newlines) {
1272                                 ignore_newlines = TRUE;
1273                                 str = g_string_append_unichar (str, c);
1274                         }
1275                 } else {
1276                         ignore_newlines = FALSE;
1277                         str = g_string_append_unichar (str, c);
1278                 }
1279         }
1280
1281         gtk_clipboard_set_text (clipboard, str->str, str->len);
1282         g_string_free (str, TRUE);
1283 }
1284
1285 static void
1286 chat_text_view_iface_init (EmpathyChatViewIface *iface)
1287 {
1288         iface->append_message = chat_text_view_append_message;
1289         iface->append_event = chat_text_view_append_event;
1290         iface->scroll = chat_text_view_scroll;
1291         iface->scroll_down = chat_text_view_scroll_down;
1292         iface->get_has_selection = chat_text_view_get_has_selection;
1293         iface->clear = chat_text_view_clear;
1294         iface->find_previous = chat_text_view_find_previous;
1295         iface->find_next = chat_text_view_find_next;
1296         iface->find_abilities = chat_text_view_find_abilities;
1297         iface->highlight = chat_text_view_highlight;
1298         iface->copy_clipboard = chat_text_view_copy_clipboard;
1299 }
1300
1301 EmpathyContact *
1302 empathy_chat_text_view_get_last_contact (EmpathyChatTextView *view)
1303 {
1304         EmpathyChatTextViewPriv *priv = GET_PRIV (view);
1305
1306         g_return_val_if_fail (EMPATHY_IS_CHAT_TEXT_VIEW (view), NULL);
1307
1308         return priv->last_contact;
1309 }
1310
1311 void
1312 empathy_chat_text_view_set_only_if_date (EmpathyChatTextView *view,
1313                                          gboolean             only_if_date)
1314 {
1315         EmpathyChatTextViewPriv *priv = GET_PRIV (view);
1316
1317         g_return_if_fail (EMPATHY_IS_CHAT_TEXT_VIEW (view));
1318
1319         if (only_if_date != priv->only_if_date) {
1320                 priv->only_if_date = only_if_date;
1321                 g_object_notify (G_OBJECT (view), "only-if-date");
1322         }
1323 }
1324
1325 static void
1326 chat_text_view_replace_link (const gchar *text,
1327                              gssize len,
1328                              gpointer match_data,
1329                              gpointer user_data)
1330 {
1331         GtkTextBuffer *buffer = GTK_TEXT_BUFFER (user_data);
1332         GtkTextIter iter;
1333
1334         gtk_text_buffer_get_end_iter (buffer, &iter);
1335         gtk_text_buffer_insert_with_tags_by_name (buffer, &iter,
1336                                                   text, len,
1337                                                   EMPATHY_CHAT_TEXT_VIEW_TAG_LINK,
1338                                                   NULL);
1339 }
1340
1341 static void
1342 chat_text_view_replace_smiley (const gchar *text,
1343                                gssize len,
1344                                gpointer match_data,
1345                                gpointer user_data)
1346 {
1347         EmpathySmileyHit *hit = match_data;
1348         GtkTextBuffer *buffer = GTK_TEXT_BUFFER (user_data);
1349         GtkTextIter iter;
1350
1351         gtk_text_buffer_get_end_iter (buffer, &iter);
1352         gtk_text_buffer_insert_pixbuf (buffer, &iter, hit->pixbuf);
1353 }
1354
1355 static void
1356 chat_text_view_replace_verbatim (const gchar *text,
1357                                  gssize len,
1358                                  gpointer match_data,
1359                                  gpointer user_data)
1360 {
1361         GtkTextBuffer *buffer = GTK_TEXT_BUFFER (user_data);
1362         GtkTextIter iter;
1363
1364         gtk_text_buffer_get_end_iter (buffer, &iter);
1365         gtk_text_buffer_insert (buffer, &iter, text, len);
1366 }
1367
1368 static EmpathyStringParser string_parsers[] = {
1369         {empathy_string_match_link, chat_text_view_replace_link},
1370         {empathy_string_match_all, chat_text_view_replace_verbatim},
1371         {NULL, NULL}
1372 };
1373
1374 static EmpathyStringParser string_parsers_with_smiley[] = {
1375         {empathy_string_match_link, chat_text_view_replace_link},
1376         {empathy_string_match_smiley, chat_text_view_replace_smiley},
1377         {empathy_string_match_all, chat_text_view_replace_verbatim},
1378         {NULL, NULL}
1379 };
1380
1381 void
1382 empathy_chat_text_view_append_body (EmpathyChatTextView *view,
1383                                     const gchar         *body,
1384                                     const gchar         *tag)
1385 {
1386         EmpathyChatTextViewPriv *priv = GET_PRIV (view);
1387         EmpathyStringParser     *parsers;
1388         gboolean                 use_smileys;
1389         GtkTextIter              start_iter;
1390         GtkTextIter              iter;
1391         GtkTextMark             *mark;
1392
1393         /* Check if we have to parse smileys */
1394         empathy_conf_get_bool (empathy_conf_get (),
1395                                EMPATHY_PREFS_CHAT_SHOW_SMILEYS,
1396                                &use_smileys);
1397         if (use_smileys)
1398                 parsers = string_parsers_with_smiley;
1399         else
1400                 parsers = string_parsers;
1401
1402         /* Create a mark at the place we'll start inserting */
1403         gtk_text_buffer_get_end_iter (priv->buffer, &start_iter);
1404         mark = gtk_text_buffer_create_mark (priv->buffer, NULL, &start_iter, TRUE);
1405
1406         /* Parse text for links/smileys and insert in the buffer */
1407         empathy_string_parser_substr (body, -1, parsers, priv->buffer);
1408
1409         /* Insert a newline after the text inserted */
1410         gtk_text_buffer_get_end_iter (priv->buffer, &iter);
1411         gtk_text_buffer_insert (priv->buffer, &iter, "\n", 1);
1412
1413         /* Apply the style to the inserted text. */
1414         gtk_text_buffer_get_iter_at_mark (priv->buffer, &start_iter, mark);
1415         gtk_text_buffer_get_end_iter (priv->buffer, &iter);
1416         gtk_text_buffer_apply_tag_by_name (priv->buffer, tag,
1417                                            &start_iter,
1418                                            &iter);
1419
1420         gtk_text_buffer_delete_mark (priv->buffer, mark);
1421 }
1422
1423 void
1424 empathy_chat_text_view_append_spacing (EmpathyChatTextView *view)
1425 {
1426         EmpathyChatTextViewPriv *priv = GET_PRIV (view);
1427         GtkTextIter              iter;
1428
1429         gtk_text_buffer_get_end_iter (priv->buffer, &iter);
1430         gtk_text_buffer_insert_with_tags_by_name (priv->buffer,
1431                                                   &iter,
1432                                                   "\n",
1433                                                   -1,
1434                                                   EMPATHY_CHAT_TEXT_VIEW_TAG_CUT,
1435                                                   EMPATHY_CHAT_TEXT_VIEW_TAG_SPACING,
1436                                                   NULL);
1437 }
1438
1439 GtkTextTag *
1440 empathy_chat_text_view_tag_set (EmpathyChatTextView *view,
1441                                 const gchar         *tag_name,
1442                                 const gchar         *first_property_name,
1443                                 ...)
1444 {
1445         EmpathyChatTextViewPriv *priv = GET_PRIV (view);
1446         GtkTextTag              *tag;
1447         GtkTextTagTable         *table;
1448         va_list                  list;
1449
1450         g_return_val_if_fail (EMPATHY_IS_CHAT_TEXT_VIEW (view), NULL);
1451         g_return_val_if_fail (tag_name != NULL, NULL);
1452
1453         table = gtk_text_buffer_get_tag_table (priv->buffer);
1454         tag = gtk_text_tag_table_lookup (table, tag_name);
1455
1456         if (tag && first_property_name) {
1457                 va_start (list, first_property_name);
1458                 g_object_set_valist (G_OBJECT (tag), first_property_name, list);
1459                 va_end (list);
1460         }
1461
1462         return tag;
1463 }
1464