Pileus Git - ~andy/gtk/blob - gtk/gtkfontchooserwidget.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 2011 Alberto Ruiz <aruiz@gnome.org>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "config.h"
  19
  20 #include <stdlib.h>
  21 #include <glib/gprintf.h>
  22 #include <string.h>
  23
  24 #include <atk/atk.h>
  25
  26 #include "gtkfontchooserwidget.h"
  27
  28 #include "gtkadjustment.h"
  29 #include "gtkbuildable.h"
  30 #include "gtkbox.h"
  31 #include "gtkcellrenderertext.h"
  32 #include "gtkentry.h"
  33 #include "gtksearchentry.h"
  34 #include "gtkgrid.h"
  35 #include "gtkfontchooser.h"
  36 #include "gtkfontchooserutils.h"
  37 #include "gtkintl.h"
  38 #include "gtklabel.h"
  39 #include "gtkliststore.h"
  40 #include "gtknotebook.h"
  41 #include "gtkprivate.h"
  42 #include "gtkscale.h"
  43 #include "gtkscrolledwindow.h"
  44 #include "gtkspinbutton.h"
  45 #include "gtktextview.h"
  46 #include "gtktreeselection.h"
  47 #include "gtktreeview.h"
  48 #include "gtkwidget.h"
  49
  50 /**
  51  * SECTION:gtkfontchooserwidget
  52  * @Short_description: A widget for selecting fonts
  53  * @Title: GtkFontChooserWidget
  54  * @See_also: #GtkFontChooserDialog
  55  *
  56  * The #GtkFontChooserWidget widget lists the available fonts,
  57  * styles and sizes, allowing the user to select a font. It is
  58  * used in the #GtkFontChooserDialog widget to provide a
  59  * dialog box for selecting fonts.
  60  *
  61  * To set the font which is initially selected, use
  62  * gtk_font_chooser_set_font() or gtk_font_chooser_set_font_desc().
  63  *
  64  * To get the selected font use gtk_font_chooser_get_font() or
  65  * gtk_font_chooser_get_font_desc().
  66  *
  67  * To change the text which is shown in the preview area, use
  68  * gtk_font_chooser_set_preview_text().
  69  *
  70  * Since: 3.2
  71  */
  72
  73
  74 struct _GtkFontChooserWidgetPrivate
  75 {
  76   GtkWidget    *search_entry;
  77   GtkWidget    *family_face_list;
  78   GtkCellRenderer *family_face_cell;
  79   GtkWidget    *list_scrolled_window;
  80   GtkWidget    *empty_list;
  81   GtkWidget    *list_notebook;
  82   GtkTreeModel *model;
  83   GtkTreeModel *filter_model;
  84
  85   GtkWidget       *preview;
  86   gchar           *preview_text;
  87   gboolean         show_preview_entry;
  88
  89   GtkWidget *size_spin;
  90   GtkWidget *size_slider;
  91
  92   PangoFontDescription *font_desc;
  93   GtkTreeIter           font_iter;      /* invalid if font not available or pointer into model
  94                                            (not filter_model) to the row containing font */
  95   GtkFontFilterFunc filter_func;
  96   gpointer          filter_data;
  97   GDestroyNotify    filter_data_destroy;
  98 };
  99
 100 /* This is the initial fixed height and the top padding of the preview entry */
 101 #define PREVIEW_HEIGHT 72
 102 #define PREVIEW_TOP_PADDING 6
 103
 104 /* These are the sizes of the font, style & size lists. */
 105 #define FONT_LIST_HEIGHT  136
 106 #define FONT_LIST_WIDTH   190
 107 #define FONT_STYLE_LIST_WIDTH 170
 108 #define FONT_SIZE_LIST_WIDTH  60
 109
 110 #define NO_FONT_MATCHED_SEARCH N_("No fonts matched your search. You can revise your search and try again.")
 111
 112 enum {
 113   FAMILY_COLUMN,
 114   FACE_COLUMN,
 115   FONT_DESC_COLUMN,
 116   PREVIEW_TITLE_COLUMN
 117 };
 118
 119 static void gtk_font_chooser_widget_set_property         (GObject         *object,
 120                                                           guint            prop_id,
 121                                                           const GValue    *value,
 122                                                           GParamSpec      *pspec);
 123 static void gtk_font_chooser_widget_get_property         (GObject         *object,
 124                                                           guint            prop_id,
 125                                                           GValue          *value,
 126                                                           GParamSpec      *pspec);
 127 static void gtk_font_chooser_widget_finalize             (GObject         *object);
 128
 129 static void gtk_font_chooser_widget_screen_changed       (GtkWidget       *widget,
 130                                                           GdkScreen       *previous_screen);
 131
 132 static void gtk_font_chooser_widget_bootstrap_fontlist   (GtkFontChooserWidget *fontchooser);
 133
 134 static gboolean gtk_font_chooser_widget_find_font        (GtkFontChooserWidget *fontchooser,
 135                                                           const PangoFontDescription *font_desc,
 136                                                           GtkTreeIter          *iter);
 137 static void     gtk_font_chooser_widget_ensure_selection (GtkFontChooserWidget *fontchooser);
 138
 139 static gchar   *gtk_font_chooser_widget_get_font         (GtkFontChooserWidget *fontchooser);
 140 static void     gtk_font_chooser_widget_set_font         (GtkFontChooserWidget *fontchooser,
 141                                                           const gchar          *fontname);
 142
 143 static PangoFontDescription *gtk_font_chooser_widget_get_font_desc  (GtkFontChooserWidget *fontchooser);
 144 static void                  gtk_font_chooser_widget_merge_font_desc(GtkFontChooserWidget *fontchooser,
 145                                                                      PangoFontDescription *font_desc,
 146                                                                      GtkTreeIter          *iter);
 147 static void                  gtk_font_chooser_widget_take_font_desc (GtkFontChooserWidget *fontchooser,
 148                                                                      PangoFontDescription *font_desc);
 149
 150
 151 static const gchar *gtk_font_chooser_widget_get_preview_text (GtkFontChooserWidget *fontchooser);
 152 static void         gtk_font_chooser_widget_set_preview_text (GtkFontChooserWidget *fontchooser,
 153                                                               const gchar          *text);
 154
 155 static gboolean gtk_font_chooser_widget_get_show_preview_entry (GtkFontChooserWidget *fontchooser);
 156 static void     gtk_font_chooser_widget_set_show_preview_entry (GtkFontChooserWidget *fontchooser,
 157                                                                 gboolean              show_preview_entry);
 158
 159 static void gtk_font_chooser_widget_iface_init (GtkFontChooserIface *iface);
 160
 161 G_DEFINE_TYPE_WITH_CODE (GtkFontChooserWidget, gtk_font_chooser_widget, GTK_TYPE_BOX,
 162                          G_IMPLEMENT_INTERFACE (GTK_TYPE_FONT_CHOOSER,
 163                                                 gtk_font_chooser_widget_iface_init))
 164
 165 static void
 166 gtk_font_chooser_widget_class_init (GtkFontChooserWidgetClass *klass)
 167 {
 168   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 169   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 170
 171   widget_class->screen_changed = gtk_font_chooser_widget_screen_changed;
 172
 173   gobject_class->finalize = gtk_font_chooser_widget_finalize;
 174   gobject_class->set_property = gtk_font_chooser_widget_set_property;
 175   gobject_class->get_property = gtk_font_chooser_widget_get_property;
 176
 177   _gtk_font_chooser_install_properties (gobject_class);
 178
 179   g_type_class_add_private (klass, sizeof (GtkFontChooserWidgetPrivate));
 180 }
 181
 182 static void
 183 gtk_font_chooser_widget_set_property (GObject         *object,
 184                                       guint            prop_id,
 185                                       const GValue    *value,
 186                                       GParamSpec      *pspec)
 187 {
 188   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);
 189
 190   switch (prop_id)
 191     {
 192     case GTK_FONT_CHOOSER_PROP_FONT:
 193       gtk_font_chooser_widget_set_font (fontchooser, g_value_get_string (value));
 194       break;
 195     case GTK_FONT_CHOOSER_PROP_FONT_DESC:
 196       gtk_font_chooser_widget_take_font_desc (fontchooser, g_value_dup_boxed (value));
 197       break;
 198     case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT:
 199       gtk_font_chooser_widget_set_preview_text (fontchooser, g_value_get_string (value));
 200       break;
 201     case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY:
 202       gtk_font_chooser_widget_set_show_preview_entry (fontchooser, g_value_get_boolean (value));
 203       break;
 204     default:
 205       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 206       break;
 207     }
 208 }
 209
 210 static void
 211 gtk_font_chooser_widget_get_property (GObject         *object,
 212                                       guint            prop_id,
 213                                       GValue          *value,
 214                                       GParamSpec      *pspec)
 215 {
 216   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);
 217
 218   switch (prop_id)
 219     {
 220     case GTK_FONT_CHOOSER_PROP_FONT:
 221       g_value_take_string (value, gtk_font_chooser_widget_get_font (fontchooser));
 222       break;
 223     case GTK_FONT_CHOOSER_PROP_FONT_DESC:
 224       g_value_set_boxed (value, gtk_font_chooser_widget_get_font_desc (fontchooser));
 225       break;
 226     case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT:
 227       g_value_set_string (value, gtk_font_chooser_widget_get_preview_text (fontchooser));
 228       break;
 229     case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY:
 230       g_value_set_boolean (value, gtk_font_chooser_widget_get_show_preview_entry (fontchooser));
 231       break;
 232     default:
 233       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 234       break;
 235     }
 236 }
 237
 238 static void
 239 gtk_font_chooser_widget_refilter_font_list (GtkFontChooserWidget *fontchooser)
 240 {
 241   gtk_tree_model_filter_refilter (GTK_TREE_MODEL_FILTER (fontchooser->priv->filter_model));
 242   gtk_font_chooser_widget_ensure_selection (fontchooser);
 243 }
 244
 245 static void
 246 text_changed_cb (GtkEntry             *entry,
 247                  GParamSpec           *pspec,
 248                  GtkFontChooserWidget *fc)
 249 {
 250   gtk_font_chooser_widget_refilter_font_list (fc);
 251 }
 252
 253 static void
 254 size_change_cb (GtkAdjustment *adjustment,
 255                 gpointer       user_data)
 256 {
 257   GtkFontChooserWidget *fontchooser = user_data;
 258   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 259   PangoFontDescription *font_desc;
 260   gdouble size = gtk_adjustment_get_value (adjustment);
 261
 262   font_desc = pango_font_description_new ();
 263   if (pango_font_description_get_size_is_absolute (priv->font_desc))
 264     pango_font_description_set_absolute_size (font_desc, size * PANGO_SCALE);
 265   else
 266     pango_font_description_set_size (font_desc, size * PANGO_SCALE);
 267
 268   gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc);
 269 }
 270
 271 static void
 272 gtk_font_chooser_widget_update_marks (GtkFontChooserWidget *fontchooser)
 273 {
 274   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 275   GtkAdjustment *adj;
 276   const int *sizes;
 277   gint *font_sizes;
 278   gint i, n_sizes;
 279
 280   if (gtk_list_store_iter_is_valid (GTK_LIST_STORE (priv->model), &priv->font_iter))
 281     {
 282       PangoFontFace *face;
 283
 284       gtk_tree_model_get (priv->model, &priv->font_iter,
 285                           FACE_COLUMN, &face,
 286                           -1);
 287
 288       pango_font_face_list_sizes (face, &font_sizes, &n_sizes);
 289
 290       /* It seems not many fonts actually have a sane set of sizes */
 291       for (i = 0; i < n_sizes; i++)
 292         font_sizes[i] = font_sizes[i] / PANGO_SCALE;
 293
 294       g_object_unref (face);
 295     }
 296   else
 297     {
 298       font_sizes = NULL;
 299       n_sizes = 0;
 300     }
 301
 302   if (n_sizes < 2)
 303     {
 304       static const gint fallback_sizes[] = {
 305         6, 8, 9, 10, 11, 12, 13, 14, 16, 20, 24, 36, 48, 72
 306       };
 307
 308       sizes = fallback_sizes;
 309       n_sizes = G_N_ELEMENTS (fallback_sizes);
 310     }
 311   else
 312     {
 313       sizes = font_sizes;
 314     }
 315
 316   gtk_scale_clear_marks (GTK_SCALE (priv->size_slider));
 317
 318   adj = gtk_range_get_adjustment(GTK_RANGE (priv->size_slider));
 319
 320   /* ensure clamping doesn't callback into font resizing code */
 321   g_signal_handlers_block_by_func (adj, size_change_cb, fontchooser);
 322   gtk_adjustment_configure (adj,
 323                             gtk_adjustment_get_value (adj),
 324                             sizes[0],
 325                             sizes[n_sizes - 1],
 326                             gtk_adjustment_get_step_increment (adj),
 327                             gtk_adjustment_get_page_increment (adj),
 328                             gtk_adjustment_get_page_size (adj));
 329   g_signal_handlers_unblock_by_func (adj, size_change_cb, fontchooser);
 330
 331   for (i = 0; i < n_sizes; i++)
 332     {
 333       gtk_scale_add_mark (GTK_SCALE (priv->size_slider),
 334                           sizes[i],
 335                           GTK_POS_BOTTOM, NULL);
 336     }
 337
 338   g_free (font_sizes);
 339 }
 340
 341 static void
 342 row_activated_cb (GtkTreeView       *view,
 343                   GtkTreePath       *path,
 344                   GtkTreeViewColumn *column,
 345                   gpointer           user_data)
 346 {
 347   GtkFontChooserWidget *fontchooser = user_data;
 348   gchar *fontname;
 349
 350   fontname = gtk_font_chooser_widget_get_font (fontchooser);
 351   _gtk_font_chooser_font_activated (GTK_FONT_CHOOSER (fontchooser), fontname);
 352   g_free (fontname);
 353 }
 354
 355 static PangoFontDescription *
 356 tree_model_get_font_description (GtkTreeModel *model,
 357                                  GtkTreeIter  *iter)
 358 {
 359   PangoFontDescription *desc;
 360   PangoFontFace *face;
 361   GtkTreeIter child_iter;
 362
 363   gtk_tree_model_get (model, iter,
 364                       FONT_DESC_COLUMN, &desc,
 365                       -1);
 366   if (desc != NULL)
 367     return desc;
 368
 369   gtk_tree_model_get (model, iter,
 370                       FACE_COLUMN, &face,
 371                       -1);
 372   desc = pango_font_face_describe (face);
 373   g_object_unref (face);
 374
 375   if (GTK_IS_TREE_MODEL_FILTER (model))
 376     {
 377       gtk_tree_model_filter_convert_iter_to_child_iter (GTK_TREE_MODEL_FILTER (model),
 378                                                         &child_iter,
 379                                                         iter);
 380       iter = &child_iter;
 381       model = gtk_tree_model_filter_get_model (GTK_TREE_MODEL_FILTER (model));
 382     }
 383
 384   gtk_list_store_set (GTK_LIST_STORE (model), iter,
 385                       FONT_DESC_COLUMN, desc,
 386                       -1);
 387
 388   return desc;
 389 }
 390
 391 static void
 392 cursor_changed_cb (GtkTreeView *treeview,
 393                    gpointer     user_data)
 394 {
 395   GtkFontChooserWidget *fontchooser = user_data;
 396   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 397   PangoFontDescription *desc;
 398   GtkTreeIter filter_iter, iter;
 399   GtkTreePath *path = NULL;
 400
 401   gtk_tree_view_get_cursor (treeview, &path, NULL);
 402
 403   if (!path)
 404     return;
 405
 406   if (!gtk_tree_model_get_iter (priv->filter_model, &filter_iter, path))
 407     {
 408       gtk_tree_path_free (path);
 409       return;
 410     }
 411
 412   gtk_tree_path_free (path);
 413
 414   gtk_tree_model_filter_convert_iter_to_child_iter (GTK_TREE_MODEL_FILTER (priv->filter_model),
 415                                                     &iter,
 416                                                     &filter_iter);
 417   desc = tree_model_get_font_description (priv->model, &iter);
 418
 419   gtk_font_chooser_widget_merge_font_desc (fontchooser, desc, &iter);
 420 }
 421
 422 static gboolean
 423 zoom_preview_cb (GtkWidget      *scrolled_window,
 424                  GdkEventScroll *event,
 425                  gpointer        user_data)
 426 {
 427   GtkFontChooserWidget *fc = user_data;
 428   GtkFontChooserWidgetPrivate *priv = fc->priv;
 429   GtkAdjustment *adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin));
 430
 431   if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_RIGHT)
 432     gtk_adjustment_set_value (adj,
 433                               gtk_adjustment_get_value (adj) +
 434                               gtk_adjustment_get_step_increment (adj));
 435   else if (event->direction == GDK_SCROLL_DOWN || event->direction == GDK_SCROLL_LEFT)
 436     gtk_adjustment_set_value (adj,
 437                               gtk_adjustment_get_value (adj) -
 438                               gtk_adjustment_get_step_increment (adj));
 439   return TRUE;
 440 }
 441
 442 static void
 443 row_inserted_cb (GtkTreeModel *model,
 444                  GtkTreePath  *path,
 445                  GtkTreeIter  *iter,
 446                  gpointer      user_data)
 447 {
 448   GtkFontChooserWidget *fontchooser = user_data;
 449   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 450
 451   gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->list_notebook), 0);
 452 }
 453
 454 static void
 455 row_deleted_cb  (GtkTreeModel *model,
 456                  GtkTreePath  *path,
 457                  gpointer      user_data)
 458 {
 459   GtkFontChooserWidget *fontchooser = user_data;
 460   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 461
 462   if (gtk_tree_model_iter_n_children (model, NULL) == 0)
 463     gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->list_notebook), 1);
 464 }
 465
 466 static void
 467 gtk_font_chooser_widget_init (GtkFontChooserWidget *fontchooser)
 468 {
 469   GtkFontChooserWidgetPrivate *priv;
 470   GtkWidget *scrolled_win;
 471   GtkWidget *grid;
 472
 473   fontchooser->priv = G_TYPE_INSTANCE_GET_PRIVATE (fontchooser,
 474                                                    GTK_TYPE_FONT_CHOOSER_WIDGET,
 475                                                    GtkFontChooserWidgetPrivate);
 476
 477   priv = fontchooser->priv;
 478
 479   /* Default preview string  */
 480   priv->preview_text = g_strdup (pango_language_get_sample_string (NULL));
 481   priv->show_preview_entry = TRUE;
 482   priv->font_desc = pango_font_description_new ();
 483
 484   gtk_widget_push_composite_child ();
 485
 486   /* Creating fundamental widgets for the private struct */
 487   priv->search_entry = gtk_search_entry_new ();
 488   priv->family_face_list = gtk_tree_view_new ();
 489   gtk_tree_view_set_enable_search (GTK_TREE_VIEW (priv->family_face_list), FALSE);
 490   priv->preview = gtk_entry_new ();
 491   priv->size_slider = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL,
 492                                                 0.0,
 493                                                 (gdouble)(G_MAXINT / PANGO_SCALE),
 494                                                 1.0);
 495
 496   priv->size_spin = gtk_spin_button_new_with_range (0.0, (gdouble)(G_MAXINT / PANGO_SCALE), 1.0);
 497
 498   /** Bootstrapping widget layout **/
 499   gtk_box_set_spacing (GTK_BOX (fontchooser), 6);
 500
 501   /* Main font family/face view */
 502   priv->list_scrolled_window = gtk_scrolled_window_new (NULL, NULL);
 503   scrolled_win = priv->list_scrolled_window;
 504   gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_win),
 505                                   GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 506   gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolled_win),
 507                                        GTK_SHADOW_ETCHED_IN);
 508   gtk_widget_set_size_request (scrolled_win, 400, 300);
 509   gtk_container_add (GTK_CONTAINER (scrolled_win), priv->family_face_list);
 510
 511   /* Text to display when list is empty */
 512   priv->empty_list = gtk_label_new (_(NO_FONT_MATCHED_SEARCH));
 513   gtk_widget_set_margin_top    (priv->empty_list, 12);
 514   gtk_widget_set_margin_left   (priv->empty_list, 12);
 515   gtk_widget_set_margin_right  (priv->empty_list, 12);
 516   gtk_widget_set_margin_bottom (priv->empty_list, 12);
 517   gtk_widget_set_halign (priv->empty_list, GTK_ALIGN_CENTER);
 518   gtk_widget_set_valign (priv->empty_list, GTK_ALIGN_START);
 519
 520   priv->list_notebook = gtk_notebook_new ();
 521   gtk_notebook_set_show_tabs (GTK_NOTEBOOK (priv->list_notebook), FALSE);
 522   gtk_notebook_append_page (GTK_NOTEBOOK (priv->list_notebook), scrolled_win, NULL);
 523   gtk_notebook_append_page (GTK_NOTEBOOK (priv->list_notebook), priv->empty_list, NULL);
 524
 525   /* Basic layout */
 526   grid = gtk_grid_new ();
 527
 528   gtk_grid_set_column_spacing (GTK_GRID (grid), 6);
 529   gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
 530
 531   gtk_grid_attach (GTK_GRID (grid), priv->search_entry, 0, 0, 2, 1);
 532   gtk_grid_attach (GTK_GRID (grid), priv->list_notebook, 0, 1, 2, 1);
 533   gtk_grid_attach (GTK_GRID (grid), priv->preview,      0, 2, 2, 1);
 534
 535   gtk_grid_attach (GTK_GRID (grid), priv->size_slider,  0, 3, 1, 1);
 536   gtk_grid_attach (GTK_GRID (grid), priv->size_spin,    1, 3, 1, 1);
 537
 538   gtk_widget_set_hexpand  (GTK_WIDGET (scrolled_win),      TRUE);
 539   gtk_widget_set_vexpand  (GTK_WIDGET (scrolled_win),      TRUE);
 540   gtk_widget_set_hexpand  (GTK_WIDGET (priv->search_entry), TRUE);
 541
 542   gtk_widget_set_hexpand  (GTK_WIDGET (priv->size_slider), TRUE);
 543   gtk_widget_set_hexpand  (GTK_WIDGET (priv->size_spin),   FALSE);
 544
 545   gtk_box_pack_start (GTK_BOX (fontchooser), grid, TRUE, TRUE, 0);
 546
 547   gtk_widget_show_all (GTK_WIDGET (fontchooser));
 548   gtk_widget_hide     (GTK_WIDGET (fontchooser));
 549
 550   /* Treeview column and model bootstrapping */
 551   gtk_font_chooser_widget_bootstrap_fontlist (fontchooser);
 552
 553   /* Set default preview text */
 554   gtk_entry_set_text (GTK_ENTRY (priv->preview),
 555                       pango_language_get_sample_string (NULL));
 556
 557   gtk_entry_set_placeholder_text (GTK_ENTRY (priv->search_entry), _("Search font name"));
 558
 559   /* Callback connections */
 560   g_signal_connect (priv->search_entry, "notify::text",
 561                     G_CALLBACK (text_changed_cb), fontchooser);
 562
 563   g_signal_connect (gtk_range_get_adjustment (GTK_RANGE (priv->size_slider)),
 564                     "value-changed", G_CALLBACK (size_change_cb), fontchooser);
 565   g_signal_connect (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin)),
 566                     "value-changed", G_CALLBACK (size_change_cb), fontchooser);
 567
 568   g_signal_connect (priv->family_face_list, "cursor-changed",
 569                     G_CALLBACK (cursor_changed_cb), fontchooser);
 570   g_signal_connect (priv->family_face_list, "row-activated",
 571                     G_CALLBACK (row_activated_cb), fontchooser);
 572
 573   /* Zoom on preview scroll */
 574   g_signal_connect (priv->preview, "scroll-event",
 575                     G_CALLBACK (zoom_preview_cb), fontchooser);
 576
 577   g_signal_connect (priv->size_slider, "scroll-event",
 578                     G_CALLBACK (zoom_preview_cb), fontchooser);
 579
 580   /* Font list empty hides the scrolledwindow */
 581   g_signal_connect (G_OBJECT (priv->filter_model), "row-deleted",
 582                     G_CALLBACK (row_deleted_cb), fontchooser);
 583   g_signal_connect (G_OBJECT (priv->filter_model), "row-inserted",
 584                     G_CALLBACK (row_inserted_cb), fontchooser);
 585
 586   /* Set default focus */
 587   gtk_widget_pop_composite_child ();
 588
 589   gtk_font_chooser_widget_take_font_desc (fontchooser, NULL);
 590 }
 591
 592 /**
 593  * gtk_font_chooser_widget_new:
 594  *
 595  * Creates a new #GtkFontChooserWidget.
 596  *
 597  * Return value: a new #GtkFontChooserWidget
 598  *
 599  * Since: 3.2
 600  */
 601 GtkWidget *
 602 gtk_font_chooser_widget_new (void)
 603 {
 604   return g_object_new (GTK_TYPE_FONT_CHOOSER_WIDGET, NULL);
 605 }
 606
 607 static int
 608 cmp_families (const void *a,
 609               const void *b)
 610 {
 611   const char *a_name = pango_font_family_get_name (*(PangoFontFamily **)a);
 612   const char *b_name = pango_font_family_get_name (*(PangoFontFamily **)b);
 613
 614   return g_utf8_collate (a_name, b_name);
 615 }
 616
 617 static void
 618 gtk_font_chooser_widget_load_fonts (GtkFontChooserWidget *fontchooser)
 619 {
 620   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 621   GtkListStore *list_store;
 622   gint n_families, i;
 623   PangoFontFamily **families;
 624   gchar *family_and_face;
 625
 626   list_store = GTK_LIST_STORE (priv->model);
 627
 628   pango_context_list_families (gtk_widget_get_pango_context (GTK_WIDGET (fontchooser)),
 629                                &families,
 630                                &n_families);
 631
 632   qsort (families, n_families, sizeof (PangoFontFamily *), cmp_families);
 633
 634   gtk_list_store_clear (list_store);
 635
 636   /* Iterate over families and faces */
 637   for (i = 0; i < n_families; i++)
 638     {
 639       GtkTreeIter     iter;
 640       PangoFontFace **faces;
 641       int             j, n_faces;
 642       const gchar    *fam_name = pango_font_family_get_name (families[i]);
 643
 644       pango_font_family_list_faces (families[i], &faces, &n_faces);
 645
 646       for (j = 0; j < n_faces; j++)
 647         {
 648           const gchar *face_name;
 649
 650           face_name = pango_font_face_get_face_name (faces[j]);
 651
 652           family_and_face = g_strconcat (fam_name, " ", face_name, NULL);
 653
 654           gtk_list_store_insert_with_values (list_store, &iter, -1,
 655                                              FAMILY_COLUMN, families[i],
 656                                              FACE_COLUMN, faces[j],
 657                                              PREVIEW_TITLE_COLUMN, family_and_face,
 658                                              -1);
 659
 660           g_free (family_and_face);
 661         }
 662
 663       g_free (faces);
 664     }
 665
 666   g_free (families);
 667
 668   /* now make sure the font list looks right */
 669   if (!gtk_font_chooser_widget_find_font (fontchooser,
 670                                           priv->font_desc,
 671                                           &priv->font_iter))
 672     memset (&priv->font_iter, 0, sizeof (GtkTreeIter));
 673
 674   gtk_font_chooser_widget_ensure_selection (fontchooser);
 675 }
 676
 677 static gboolean
 678 visible_func (GtkTreeModel *model,
 679               GtkTreeIter  *iter,
 680               gpointer      user_data)
 681 {
 682   GtkFontChooserWidgetPrivate *priv = user_data;
 683   gboolean result = TRUE;
 684   const gchar *search_text;
 685   gchar **split_terms;
 686   gchar *font_name, *font_name_casefold;
 687   guint i;
 688
 689   if (priv->filter_func != NULL)
 690     {
 691       PangoFontFamily *family;
 692       PangoFontFace *face;
 693
 694       gtk_tree_model_get (model, iter,
 695                           FAMILY_COLUMN, &family,
 696                           FACE_COLUMN, &face,
 697                           -1);
 698
 699       result = priv->filter_func (family, face, priv->filter_data);
 700
 701       g_object_unref (family);
 702       g_object_unref (face);
 703
 704       if (!result)
 705         return FALSE;
 706     }
 707
 708   /* If there's no filter string we show the item */
 709   search_text = gtk_entry_get_text (GTK_ENTRY (priv->search_entry));
 710   if (strlen (search_text) == 0)
 711     return TRUE;
 712
 713   gtk_tree_model_get (model, iter,
 714                       PREVIEW_TITLE_COLUMN, &font_name,
 715                       -1);
 716
 717   if (font_name == NULL)
 718     return FALSE;
 719
 720   split_terms = g_strsplit (search_text, " ", 0);
 721   font_name_casefold = g_utf8_casefold (font_name, -1);
 722
 723   for (i = 0; split_terms[i] && result; i++)
 724     {
 725       gchar* term_casefold = g_utf8_casefold (split_terms[i], -1);
 726
 727       if (!strstr (font_name_casefold, term_casefold))
 728         result = FALSE;
 729
 730       g_free (term_casefold);
 731     }
 732
 733   g_free (font_name_casefold);
 734   g_free (font_name);
 735   g_strfreev (split_terms);
 736
 737   return result;
 738 }
 739
 740 /* in pango units */
 741 static int
 742 gtk_font_chooser_widget_get_preview_text_height (GtkFontChooserWidget *fontchooser)
 743 {
 744   GtkWidget *treeview = fontchooser->priv->family_face_list;
 745   double dpi, font_size;
 746
 747   dpi = gdk_screen_get_resolution (gtk_widget_get_screen (treeview));
 748   gtk_style_context_get (gtk_widget_get_style_context (treeview),
 749                          gtk_widget_get_state_flags (treeview),
 750                          "font-size", &font_size,
 751                          NULL);
 752
 753   return (dpi < 0.0 ? 96.0 : dpi) / 72.0 * PANGO_SCALE_X_LARGE * font_size * PANGO_SCALE;
 754 }
 755
 756 static PangoAttrList *
 757 gtk_font_chooser_widget_get_preview_attributes (GtkFontChooserWidget       *fontchooser,
 758                                                 const PangoFontDescription *font_desc,
 759                                                 gsize                       first_line_len)
 760 {
 761   PangoAttribute *attribute;
 762   PangoAttrList *attrs;
 763
 764   attrs = pango_attr_list_new ();
 765
 766   attribute = pango_attr_weight_new (PANGO_WEIGHT_BOLD);
 767   attribute->end_index = first_line_len;
 768   pango_attr_list_insert (attrs, attribute);
 769
 770   attribute = pango_attr_scale_new (PANGO_SCALE_SMALL);
 771   attribute->end_index = first_line_len;
 772   pango_attr_list_insert (attrs, attribute);
 773
 774   if (font_desc)
 775     {
 776       attribute = pango_attr_font_desc_new (font_desc);
 777       attribute->start_index = first_line_len;
 778       pango_attr_list_insert (attrs, attribute);
 779     }
 780
 781   attribute = pango_attr_fallback_new (FALSE);
 782   attribute->start_index = first_line_len;
 783   pango_attr_list_insert (attrs, attribute);
 784
 785   attribute = pango_attr_size_new_absolute (gtk_font_chooser_widget_get_preview_text_height (fontchooser));
 786   attribute->start_index = first_line_len;
 787   pango_attr_list_insert (attrs, attribute);
 788
 789   return attrs;
 790 }
 791
 792 static void
 793 gtk_font_chooser_widget_cell_data_func (GtkTreeViewColumn *column,
 794                                         GtkCellRenderer   *cell,
 795                                         GtkTreeModel      *tree_model,
 796                                         GtkTreeIter       *iter,
 797                                         gpointer           user_data)
 798 {
 799   GtkFontChooserWidget *fontchooser = user_data;
 800   PangoFontDescription *font_desc;
 801   PangoAttrList *attrs;
 802   char *to_string, *text;
 803   gsize first_line_len;
 804
 805   font_desc = tree_model_get_font_description (tree_model, iter);
 806
 807   to_string = pango_font_description_to_string (font_desc);
 808
 809   text = g_strconcat (to_string, "\n", fontchooser->priv->preview_text, NULL);
 810   first_line_len = strlen (to_string) + 1;
 811
 812   attrs = gtk_font_chooser_widget_get_preview_attributes (fontchooser,
 813                                                           font_desc,
 814                                                           first_line_len);
 815
 816   g_object_set (cell,
 817                 "attributes", attrs,
 818                 "text", text,
 819                 NULL);
 820
 821   pango_font_description_free (font_desc);
 822   pango_attr_list_unref (attrs);
 823   g_free (to_string);
 824   g_free (text);
 825 }
 826
 827 static void
 828 gtk_font_chooser_widget_set_cell_size (GtkFontChooserWidget *fontchooser)
 829 {
 830   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 831   PangoAttrList *attrs;
 832   GtkRequisition size;
 833
 834   gtk_cell_renderer_set_fixed_size (priv->family_face_cell, -1, -1);
 835
 836   attrs = gtk_font_chooser_widget_get_preview_attributes (fontchooser,
 837                                                           NULL,
 838                                                           1);
 839
 840   g_object_set (priv->family_face_cell,
 841                 "attributes", attrs,
 842                 "text", "x\nx",
 843                 NULL);
 844
 845   pango_attr_list_unref (attrs);
 846
 847   gtk_cell_renderer_get_preferred_size (priv->family_face_cell,
 848                                         priv->family_face_list,
 849                                         &size,
 850                                         NULL);
 851   gtk_cell_renderer_set_fixed_size (priv->family_face_cell, size.width, size.height);
 852 }
 853
 854 static void
 855 gtk_font_chooser_widget_bootstrap_fontlist (GtkFontChooserWidget *fontchooser)
 856 {
 857   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 858   GtkTreeView *treeview = GTK_TREE_VIEW (priv->family_face_list);
 859   GtkTreeViewColumn *col;
 860
 861   g_signal_connect_data (priv->family_face_list,
 862                          "style-updated",
 863                          G_CALLBACK (gtk_font_chooser_widget_set_cell_size),
 864                          fontchooser,
 865                          NULL,
 866                          G_CONNECT_AFTER | G_CONNECT_SWAPPED);
 867
 868   priv->model = GTK_TREE_MODEL (gtk_list_store_new (4,
 869                                                     PANGO_TYPE_FONT_FAMILY,
 870                                                     PANGO_TYPE_FONT_FACE,
 871                                                     PANGO_TYPE_FONT_DESCRIPTION,
 872                                                     G_TYPE_STRING));
 873
 874   priv->filter_model = gtk_tree_model_filter_new (priv->model, NULL);
 875   g_object_unref (priv->model);
 876
 877   gtk_tree_model_filter_set_visible_func (GTK_TREE_MODEL_FILTER (priv->filter_model),
 878                                           visible_func, (gpointer)priv, NULL);
 879
 880   gtk_tree_view_set_model (treeview, priv->filter_model);
 881   g_object_unref (priv->filter_model);
 882
 883   gtk_tree_view_set_rules_hint      (treeview, TRUE);
 884   gtk_tree_view_set_headers_visible (treeview, FALSE);
 885   gtk_tree_view_set_fixed_height_mode (treeview, TRUE);
 886
 887   priv->family_face_cell = gtk_cell_renderer_text_new ();
 888   g_object_set (priv->family_face_cell, "ellipsize", PANGO_ELLIPSIZE_END, NULL);
 889
 890   col = gtk_tree_view_column_new ();
 891   gtk_tree_view_column_set_title (col, _("Font Family"));
 892   gtk_tree_view_column_set_sizing (col, GTK_TREE_VIEW_COLUMN_FIXED);
 893   gtk_tree_view_column_pack_start (col, priv->family_face_cell, TRUE);
 894   gtk_tree_view_column_set_cell_data_func (col,
 895                                            priv->family_face_cell,
 896                                            gtk_font_chooser_widget_cell_data_func,
 897                                            fontchooser,
 898                                            NULL);
 899
 900   gtk_tree_view_append_column (treeview, col);
 901
 902   gtk_font_chooser_widget_load_fonts (fontchooser);
 903
 904   gtk_font_chooser_widget_set_cell_size (fontchooser);
 905 }
 906
 907 static void
 908 gtk_font_chooser_widget_finalize (GObject *object)
 909 {
 910   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);
 911   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 912
 913   if (priv->font_desc)
 914     pango_font_description_free (priv->font_desc);
 915
 916   if (priv->filter_data_destroy)
 917     priv->filter_data_destroy (priv->filter_data);
 918
 919   G_OBJECT_CLASS (gtk_font_chooser_widget_parent_class)->finalize (object);
 920 }
 921
 922 static gboolean
 923 my_pango_font_family_equal (const char *familya,
 924                             const char *familyb)
 925 {
 926   return g_ascii_strcasecmp (familya, familyb) == 0;
 927 }
 928
 929 static gboolean
 930 gtk_font_chooser_widget_find_font (GtkFontChooserWidget        *fontchooser,
 931                                    const PangoFontDescription  *font_desc,
 932                                    /* out arguments */
 933                                    GtkTreeIter                 *iter)
 934 {
 935   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 936   PangoFontDescription *desc;
 937   PangoFontFamily *family;
 938   gboolean valid;
 939
 940   if (pango_font_description_get_family (font_desc) == NULL)
 941     return FALSE;
 942
 943   for (valid = gtk_tree_model_get_iter_first (priv->model, iter);
 944        valid;
 945        valid = gtk_tree_model_iter_next (priv->model, iter))
 946     {
 947       gtk_tree_model_get (priv->model, iter,
 948                           FAMILY_COLUMN, &family,
 949                           -1);
 950
 951       if (!my_pango_font_family_equal (pango_font_description_get_family (font_desc),
 952                                        pango_font_family_get_name (family)))
 953         continue;
 954
 955       desc = tree_model_get_font_description (priv->model, iter);
 956
 957       pango_font_description_merge_static (desc, font_desc, FALSE);
 958       if (pango_font_description_equal (desc, font_desc))
 959         break;
 960
 961       pango_font_description_free (desc);
 962     }
 963
 964   return valid;
 965 }
 966
 967 static void
 968 gtk_font_chooser_widget_screen_changed (GtkWidget *widget,
 969                                         GdkScreen *previous_screen)
 970 {
 971   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (widget);
 972
 973   if (GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->screen_changed)
 974     GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->screen_changed (widget, previous_screen);
 975
 976   if (previous_screen == NULL)
 977     previous_screen = gdk_screen_get_default ();
 978
 979   if (previous_screen == gtk_widget_get_screen (widget))
 980     return;
 981
 982   gtk_font_chooser_widget_load_fonts (fontchooser);
 983 }
 984
 985 static PangoFontFamily *
 986 gtk_font_chooser_widget_get_family (GtkFontChooser *chooser)
 987 {
 988   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
 989   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 990   PangoFontFamily *family;
 991
 992   if (!gtk_list_store_iter_is_valid (GTK_LIST_STORE (priv->model), &priv->font_iter))
 993     return NULL;
 994
 995   gtk_tree_model_get (priv->model, &priv->font_iter,
 996                       FAMILY_COLUMN, &family,
 997                       -1);
 998   g_object_unref (family);
 999
1000   return family;
1001 }
1002
1003 static PangoFontFace *
1004 gtk_font_chooser_widget_get_face (GtkFontChooser *chooser)
1005 {
1006   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
1007   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1008   PangoFontFace *face;
1009
1010   if (!gtk_list_store_iter_is_valid (GTK_LIST_STORE (priv->model), &priv->font_iter))
1011     return NULL;
1012
1013   gtk_tree_model_get (priv->model, &priv->font_iter,
1014                       FACE_COLUMN, &face,
1015                       -1);
1016   g_object_unref (face);
1017
1018   return face;
1019 }
1020
1021 static gint
1022 gtk_font_chooser_widget_get_size (GtkFontChooser *chooser)
1023 {
1024   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
1025
1026   return pango_font_description_get_size (fontchooser->priv->font_desc);
1027 }
1028
1029 static gchar *
1030 gtk_font_chooser_widget_get_font (GtkFontChooserWidget *fontchooser)
1031 {
1032   return pango_font_description_to_string (fontchooser->priv->font_desc);
1033 }
1034
1035 static PangoFontDescription *
1036 gtk_font_chooser_widget_get_font_desc (GtkFontChooserWidget *fontchooser)
1037 {
1038   return fontchooser->priv->font_desc;
1039 }
1040
1041 static void
1042 gtk_font_chooser_widget_set_font (GtkFontChooserWidget *fontchooser,
1043                                   const gchar          *fontname)
1044 {
1045   PangoFontDescription *font_desc;
1046
1047   font_desc = pango_font_description_from_string (fontname);
1048   gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc);
1049 }
1050
1051 static void
1052 gtk_font_chooser_widget_ensure_selection (GtkFontChooserWidget *fontchooser)
1053 {
1054   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1055   GtkTreeSelection *selection;
1056   GtkTreeIter filter_iter;
1057
1058   selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->family_face_list));
1059
1060   if (gtk_list_store_iter_is_valid (GTK_LIST_STORE (priv->model), &priv->font_iter) &&
1061       gtk_tree_model_filter_convert_child_iter_to_iter (GTK_TREE_MODEL_FILTER (priv->filter_model),
1062                                                         &filter_iter,
1063                                                         &priv->font_iter))
1064     {
1065       GtkTreePath *path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->filter_model),
1066                                                    &filter_iter);
1067
1068       gtk_tree_selection_select_iter (selection, &filter_iter);
1069       gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (priv->family_face_list),
1070                                     path, NULL, FALSE, 0.0, 0.0);
1071       gtk_tree_path_free (path);
1072     }
1073   else
1074     {
1075       gtk_tree_selection_unselect_all (selection);
1076     }
1077 }
1078
1079 static void
1080 gtk_font_chooser_widget_merge_font_desc (GtkFontChooserWidget *fontchooser,
1081                                          PangoFontDescription *font_desc,
1082                                          GtkTreeIter          *iter)
1083 {
1084   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1085   PangoFontMask mask;
1086
1087   g_assert (font_desc != NULL);
1088   /* iter may be NULL if the font doesn't exist on the list */
1089
1090   mask = pango_font_description_get_set_fields (font_desc);
1091
1092   /* sucky test, because we can't restrict the comparison to
1093    * only the parts that actually do get merged */
1094   if (pango_font_description_equal (font_desc, priv->font_desc))
1095     {
1096       pango_font_description_free (font_desc);
1097       return;
1098     }
1099
1100   pango_font_description_merge (priv->font_desc, font_desc, TRUE);
1101
1102   if (mask & PANGO_FONT_MASK_SIZE)
1103     {
1104       double font_size = (double) pango_font_description_get_size (priv->font_desc) / PANGO_SCALE;
1105       /* XXX: This clamps, which can cause it to reloop into here, do we need
1106        * to block its signal handler? */
1107       gtk_range_set_value (GTK_RANGE (priv->size_slider), font_size);
1108       gtk_spin_button_set_value (GTK_SPIN_BUTTON (priv->size_spin), font_size);
1109     }
1110   if (mask & (PANGO_FONT_MASK_FAMILY | PANGO_FONT_MASK_STYLE | PANGO_FONT_MASK_VARIANT |
1111               PANGO_FONT_MASK_WEIGHT | PANGO_FONT_MASK_STRETCH))
1112     {
1113       if (&priv->font_iter != iter)
1114         {
1115           if (iter == NULL)
1116             memset (&priv->font_iter, 0, sizeof (GtkTreeIter));
1117           else
1118             memcpy (&priv->font_iter, iter, sizeof (GtkTreeIter));
1119
1120           gtk_font_chooser_widget_ensure_selection (fontchooser);
1121         }
1122
1123       gtk_font_chooser_widget_update_marks (fontchooser);
1124     }
1125
1126   gtk_widget_override_font (priv->preview, priv->font_desc);
1127
1128   pango_font_description_free (font_desc); /* adopted */
1129
1130   g_object_notify (G_OBJECT (fontchooser), "font");
1131   g_object_notify (G_OBJECT (fontchooser), "font-desc");
1132 }
1133
1134 static void
1135 gtk_font_chooser_widget_take_font_desc (GtkFontChooserWidget *fontchooser,
1136                                         PangoFontDescription *font_desc)
1137 {
1138   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1139   PangoFontMask mask;
1140
1141   if (font_desc == NULL)
1142     font_desc = pango_font_description_from_string (GTK_FONT_CHOOSER_DEFAULT_FONT_NAME);
1143
1144   mask = pango_font_description_get_set_fields (font_desc);
1145   if (mask & (PANGO_FONT_MASK_FAMILY | PANGO_FONT_MASK_STYLE | PANGO_FONT_MASK_VARIANT |
1146               PANGO_FONT_MASK_WEIGHT | PANGO_FONT_MASK_STRETCH))
1147     {
1148       GtkTreeIter iter;
1149
1150       if (gtk_font_chooser_widget_find_font (fontchooser,
1151                                              font_desc,
1152                                              &iter))
1153         {
1154           gtk_font_chooser_widget_merge_font_desc (fontchooser,
1155                                                    font_desc,
1156                                                    &iter);
1157         }
1158       else
1159         {
1160           gtk_font_chooser_widget_merge_font_desc (fontchooser,
1161                                                    font_desc,
1162                                                    NULL);
1163         }
1164     }
1165   else
1166     {
1167       gtk_font_chooser_widget_merge_font_desc (fontchooser,
1168                                                font_desc,
1169                                                &priv->font_iter);
1170
1171     }
1172 }
1173
1174 static const gchar*
1175 gtk_font_chooser_widget_get_preview_text (GtkFontChooserWidget *fontchooser)
1176 {
1177   return fontchooser->priv->preview_text;
1178 }
1179
1180 static void
1181 gtk_font_chooser_widget_set_preview_text (GtkFontChooserWidget *fontchooser,
1182                                           const gchar          *text)
1183 {
1184   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1185
1186   g_free (priv->preview_text);
1187   priv->preview_text = g_strdup (text);
1188
1189   gtk_entry_set_text (GTK_ENTRY (priv->preview), text);
1190
1191   g_object_notify (G_OBJECT (fontchooser), "preview-text");
1192
1193   /* XXX: There's no API to tell the treeview that a column has changed,
1194    * so we just */
1195   gtk_widget_queue_draw (priv->family_face_list);
1196 }
1197
1198 static gboolean
1199 gtk_font_chooser_widget_get_show_preview_entry (GtkFontChooserWidget *fontchooser)
1200 {
1201   return fontchooser->priv->show_preview_entry;
1202 }
1203
1204 static void
1205 gtk_font_chooser_widget_set_show_preview_entry (GtkFontChooserWidget *fontchooser,
1206                                                 gboolean              show_preview_entry)
1207 {
1208   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1209
1210   if (priv->show_preview_entry != show_preview_entry)
1211     {
1212       fontchooser->priv->show_preview_entry = show_preview_entry;
1213
1214       if (show_preview_entry)
1215         gtk_widget_show (fontchooser->priv->preview);
1216       else
1217         gtk_widget_hide (fontchooser->priv->preview);
1218
1219       g_object_notify (G_OBJECT (fontchooser), "show-preview-entry");
1220     }
1221 }
1222
1223 static void
1224 gtk_font_chooser_widget_set_filter_func (GtkFontChooser  *chooser,
1225                                          GtkFontFilterFunc filter,
1226                                          gpointer          data,
1227                                          GDestroyNotify    destroy)
1228 {
1229   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
1230   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1231
1232   if (priv->filter_data_destroy)
1233     priv->filter_data_destroy (priv->filter_data);
1234
1235   priv->filter_func = filter;
1236   priv->filter_data = data;
1237   priv->filter_data_destroy = destroy;
1238
1239   gtk_font_chooser_widget_refilter_font_list (fontchooser);
1240 }
1241
1242 static void
1243 gtk_font_chooser_widget_iface_init (GtkFontChooserIface *iface)
1244 {
1245   iface->get_font_family = gtk_font_chooser_widget_get_family;
1246   iface->get_font_face = gtk_font_chooser_widget_get_face;
1247   iface->get_font_size = gtk_font_chooser_widget_get_size;
1248   iface->set_filter_func = gtk_font_chooser_widget_set_filter_func;
1249 }