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 "gtkgrid.h"
  34 #include "gtkfontchooser.h"
  35 #include "gtkfontchooserutils.h"
  36 #include "gtkintl.h"
  37 #include "gtklabel.h"
  38 #include "gtkliststore.h"
  39 #include "gtknotebook.h"
  40 #include "gtkprivate.h"
  41 #include "gtkscale.h"
  42 #include "gtkscrolledwindow.h"
  43 #include "gtkspinbutton.h"
  44 #include "gtktextview.h"
  45 #include "gtktreeselection.h"
  46 #include "gtktreeview.h"
  47 #include "gtkwidget.h"
  48
  49 /**
  50  * SECTION:gtkfontchooserwidget
  51  * @Short_description: A widget for selecting fonts
  52  * @Title: GtkFontChooserWidget
  53  * @See_also: #GtkFontChooserDialog
  54  *
  55  * The #GtkFontChooserWidget widget lists the available fonts,
  56  * styles and sizes, allowing the user to select a font. It is
  57  * used in the #GtkFontChooserDialog widget to provide a
  58  * dialog box for selecting fonts.
  59  *
  60  * To set the font which is initially selected, use
  61  * gtk_font_chooser_set_font() or gtk_font_chooser_set_font_desc().
  62  *
  63  * To get the selected font use gtk_font_chooser_get_font() or
  64  * gtk_font_chooser_get_font_desc().
  65  *
  66  * To change the text which is shown in the preview area, use
  67  * gtk_font_chooser_set_preview_text().
  68  *
  69  * Since: 3.2
  70  */
  71
  72
  73 struct _GtkFontChooserWidgetPrivate
  74 {
  75   GtkWidget    *search_entry;
  76   GtkWidget    *family_face_list;
  77   GtkCellRenderer *family_face_cell;
  78   GtkWidget    *list_scrolled_window;
  79   GtkWidget    *empty_list;
  80   GtkWidget    *list_notebook;
  81   GtkTreeModel *model;
  82   GtkTreeModel *filter_model;
  83
  84   GtkWidget       *preview;
  85   gchar           *preview_text;
  86   gboolean         show_preview_entry;
  87
  88   GtkWidget *size_spin;
  89   GtkWidget *size_slider;
  90
  91   PangoFontDescription *font_desc;
  92   GtkTreeIter           font_iter;      /* invalid if font not available or pointer into model
  93                                            (not filter_model) to the row containing font */
  94   GtkFontFilterFunc filter_func;
  95   gpointer          filter_data;
  96   GDestroyNotify    filter_data_destroy;
  97 };
  98
  99 /* This is the initial fixed height and the top padding of the preview entry */
 100 #define PREVIEW_HEIGHT 72
 101 #define PREVIEW_TOP_PADDING 6
 102
 103 /* These are the sizes of the font, style & size lists. */
 104 #define FONT_LIST_HEIGHT  136
 105 #define FONT_LIST_WIDTH   190
 106 #define FONT_STYLE_LIST_WIDTH 170
 107 #define FONT_SIZE_LIST_WIDTH  60
 108
 109 #define NO_FONT_MATCHED_SEARCH N_("No fonts matched your search. You can revise your search and try again.")
 110
 111 enum {
 112   FAMILY_COLUMN,
 113   FACE_COLUMN,
 114   FONT_DESC_COLUMN,
 115   PREVIEW_TITLE_COLUMN
 116 };
 117
 118 static void gtk_font_chooser_widget_set_property         (GObject         *object,
 119                                                           guint            prop_id,
 120                                                           const GValue    *value,
 121                                                           GParamSpec      *pspec);
 122 static void gtk_font_chooser_widget_get_property         (GObject         *object,
 123                                                           guint            prop_id,
 124                                                           GValue          *value,
 125                                                           GParamSpec      *pspec);
 126 static void gtk_font_chooser_widget_finalize             (GObject         *object);
 127
 128 static void gtk_font_chooser_widget_screen_changed       (GtkWidget       *widget,
 129                                                           GdkScreen       *previous_screen);
 130
 131 static void gtk_font_chooser_widget_bootstrap_fontlist   (GtkFontChooserWidget *fontchooser);
 132
 133 static gboolean gtk_font_chooser_widget_find_font        (GtkFontChooserWidget *fontchooser,
 134                                                           const PangoFontDescription *font_desc,
 135                                                           GtkTreeIter          *iter);
 136 static void     gtk_font_chooser_widget_ensure_selection (GtkFontChooserWidget *fontchooser);
 137
 138 static gchar   *gtk_font_chooser_widget_get_font         (GtkFontChooserWidget *fontchooser);
 139 static void     gtk_font_chooser_widget_set_font         (GtkFontChooserWidget *fontchooser,
 140                                                           const gchar          *fontname);
 141
 142 static PangoFontDescription *gtk_font_chooser_widget_get_font_desc  (GtkFontChooserWidget *fontchooser);
 143 static void                  gtk_font_chooser_widget_merge_font_desc(GtkFontChooserWidget *fontchooser,
 144                                                                      PangoFontDescription *font_desc,
 145                                                                      GtkTreeIter          *iter);
 146 static void                  gtk_font_chooser_widget_take_font_desc (GtkFontChooserWidget *fontchooser,
 147                                                                      PangoFontDescription *font_desc);
 148
 149
 150 static const gchar *gtk_font_chooser_widget_get_preview_text (GtkFontChooserWidget *fontchooser);
 151 static void         gtk_font_chooser_widget_set_preview_text (GtkFontChooserWidget *fontchooser,
 152                                                               const gchar          *text);
 153
 154 static gboolean gtk_font_chooser_widget_get_show_preview_entry (GtkFontChooserWidget *fontchooser);
 155 static void     gtk_font_chooser_widget_set_show_preview_entry (GtkFontChooserWidget *fontchooser,
 156                                                                 gboolean              show_preview_entry);
 157
 158 static void gtk_font_chooser_widget_iface_init (GtkFontChooserIface *iface);
 159
 160 G_DEFINE_TYPE_WITH_CODE (GtkFontChooserWidget, gtk_font_chooser_widget, GTK_TYPE_BOX,
 161                          G_IMPLEMENT_INTERFACE (GTK_TYPE_FONT_CHOOSER,
 162                                                 gtk_font_chooser_widget_iface_init))
 163
 164 static void
 165 gtk_font_chooser_widget_class_init (GtkFontChooserWidgetClass *klass)
 166 {
 167   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 168   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 169
 170   widget_class->screen_changed = gtk_font_chooser_widget_screen_changed;
 171
 172   gobject_class->finalize = gtk_font_chooser_widget_finalize;
 173   gobject_class->set_property = gtk_font_chooser_widget_set_property;
 174   gobject_class->get_property = gtk_font_chooser_widget_get_property;
 175
 176   _gtk_font_chooser_install_properties (gobject_class);
 177
 178   g_type_class_add_private (klass, sizeof (GtkFontChooserWidgetPrivate));
 179 }
 180
 181 static void
 182 gtk_font_chooser_widget_set_property (GObject         *object,
 183                                       guint            prop_id,
 184                                       const GValue    *value,
 185                                       GParamSpec      *pspec)
 186 {
 187   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);
 188
 189   switch (prop_id)
 190     {
 191     case GTK_FONT_CHOOSER_PROP_FONT:
 192       gtk_font_chooser_widget_set_font (fontchooser, g_value_get_string (value));
 193       break;
 194     case GTK_FONT_CHOOSER_PROP_FONT_DESC:
 195       gtk_font_chooser_widget_take_font_desc (fontchooser, g_value_dup_boxed (value));
 196       break;
 197     case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT:
 198       gtk_font_chooser_widget_set_preview_text (fontchooser, g_value_get_string (value));
 199       break;
 200     case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY:
 201       gtk_font_chooser_widget_set_show_preview_entry (fontchooser, g_value_get_boolean (value));
 202       break;
 203     default:
 204       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 205       break;
 206     }
 207 }
 208
 209 static void
 210 gtk_font_chooser_widget_get_property (GObject         *object,
 211                                       guint            prop_id,
 212                                       GValue          *value,
 213                                       GParamSpec      *pspec)
 214 {
 215   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);
 216
 217   switch (prop_id)
 218     {
 219     case GTK_FONT_CHOOSER_PROP_FONT:
 220       g_value_take_string (value, gtk_font_chooser_widget_get_font (fontchooser));
 221       break;
 222     case GTK_FONT_CHOOSER_PROP_FONT_DESC:
 223       g_value_set_boxed (value, gtk_font_chooser_widget_get_font_desc (fontchooser));
 224       break;
 225     case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT:
 226       g_value_set_string (value, gtk_font_chooser_widget_get_preview_text (fontchooser));
 227       break;
 228     case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY:
 229       g_value_set_boolean (value, gtk_font_chooser_widget_get_show_preview_entry (fontchooser));
 230       break;
 231     default:
 232       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 233       break;
 234     }
 235 }
 236
 237 static void
 238 gtk_font_chooser_widget_refilter_font_list (GtkFontChooserWidget *fontchooser)
 239 {
 240   gtk_tree_model_filter_refilter (GTK_TREE_MODEL_FILTER (fontchooser->priv->filter_model));
 241   gtk_font_chooser_widget_ensure_selection (fontchooser);
 242 }
 243
 244 static void
 245 text_changed_cb (GtkEntry       *entry,
 246                  GParamSpec     *pspec,
 247                  GtkFontChooserWidget *fc)
 248 {
 249   GtkFontChooserWidgetPrivate *priv = fc->priv;
 250   const gchar *text;
 251
 252   text = gtk_entry_get_text (entry);
 253
 254   if (text == NULL || text[0] == '\0')
 255     {
 256       GIcon *icon;
 257
 258       icon = g_themed_icon_new_with_default_fallbacks ("edit-find-symbolic");
 259       g_object_set (G_OBJECT (priv->search_entry),
 260                     "secondary-icon-gicon", icon,
 261                     "secondary-icon-activatable", FALSE,
 262                     "secondary-icon-sensitive", FALSE,
 263                     NULL);
 264       g_object_unref (icon);
 265     }
 266   else
 267     {
 268       if (!gtk_entry_get_icon_activatable (GTK_ENTRY (priv->search_entry), GTK_ENTRY_ICON_SECONDARY))
 269         {
 270           GIcon *icon;
 271
 272           icon = g_themed_icon_new_with_default_fallbacks ("edit-clear-symbolic");
 273           g_object_set (G_OBJECT (priv->search_entry),
 274                         "secondary-icon-gicon", icon,
 275                         "secondary-icon-activatable", TRUE,
 276                         "secondary-icon-sensitive", TRUE,
 277                         NULL);
 278           g_object_unref (icon);
 279         }
 280     }
 281
 282   gtk_font_chooser_widget_refilter_font_list (fc);
 283 }
 284
 285 static void
 286 icon_press_cb (GtkEntry             *entry,
 287                GtkEntryIconPosition  pos,
 288                GdkEvent             *event,
 289                gpointer              user_data)
 290 {
 291   gtk_entry_set_text (entry, "");
 292 }
 293
 294 static void
 295 size_change_cb (GtkAdjustment *adjustment,
 296                 gpointer       user_data)
 297 {
 298   GtkFontChooserWidget *fontchooser = user_data;
 299   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 300   PangoFontDescription *font_desc;
 301   gdouble size = gtk_adjustment_get_value (adjustment);
 302
 303   font_desc = pango_font_description_new ();
 304   if (pango_font_description_get_size_is_absolute (priv->font_desc))
 305     pango_font_description_set_absolute_size (font_desc, size * PANGO_SCALE);
 306   else
 307     pango_font_description_set_size (font_desc, size * PANGO_SCALE);
 308
 309   gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc);
 310 }
 311
 312 static void
 313 gtk_font_chooser_widget_update_marks (GtkFontChooserWidget *fontchooser)
 314 {
 315   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 316   GtkAdjustment *adj;
 317   const int *sizes;
 318   gint *font_sizes;
 319   gint i, n_sizes;
 320
 321   if (gtk_list_store_iter_is_valid (GTK_LIST_STORE (priv->model), &priv->font_iter))
 322     {
 323       PangoFontFace *face;
 324
 325       gtk_tree_model_get (priv->model, &priv->font_iter,
 326                           FACE_COLUMN, &face,
 327                           -1);
 328
 329       pango_font_face_list_sizes (face, &font_sizes, &n_sizes);
 330
 331       /* It seems not many fonts actually have a sane set of sizes */
 332       for (i = 0; i < n_sizes; i++)
 333         font_sizes[i] = font_sizes[i] / PANGO_SCALE;
 334
 335       g_object_unref (face);
 336     }
 337   else
 338     {
 339       font_sizes = NULL;
 340       n_sizes = 0;
 341     }
 342
 343   if (n_sizes < 2)
 344     {
 345       static const gint fallback_sizes[] = {
 346         6, 8, 9, 10, 11, 12, 13, 14, 16, 20, 24, 36, 48, 72
 347       };
 348
 349       sizes = fallback_sizes;
 350       n_sizes = G_N_ELEMENTS (fallback_sizes);
 351     }
 352   else
 353     {
 354       sizes = font_sizes;
 355     }
 356
 357   gtk_scale_clear_marks (GTK_SCALE (priv->size_slider));
 358
 359   adj = gtk_range_get_adjustment(GTK_RANGE (priv->size_slider));
 360
 361   /* ensure clamping doesn't callback into font resizing code */
 362   g_signal_handlers_block_by_func (adj, size_change_cb, fontchooser);
 363   gtk_adjustment_configure (adj,
 364                             gtk_adjustment_get_value (adj),
 365                             sizes[0],
 366                             sizes[n_sizes - 1],
 367                             gtk_adjustment_get_step_increment (adj),
 368                             gtk_adjustment_get_page_increment (adj),
 369                             gtk_adjustment_get_page_size (adj));
 370   g_signal_handlers_unblock_by_func (adj, size_change_cb, fontchooser);
 371
 372   for (i = 0; i < n_sizes; i++)
 373     {
 374       gtk_scale_add_mark (GTK_SCALE (priv->size_slider),
 375                           sizes[i],
 376                           GTK_POS_BOTTOM, NULL);
 377     }
 378
 379   g_free (font_sizes);
 380 }
 381
 382 static void
 383 row_activated_cb (GtkTreeView       *view,
 384                   GtkTreePath       *path,
 385                   GtkTreeViewColumn *column,
 386                   gpointer           user_data)
 387 {
 388   GtkFontChooserWidget *fontchooser = user_data;
 389   gchar *fontname;
 390
 391   fontname = gtk_font_chooser_widget_get_font (fontchooser);
 392   _gtk_font_chooser_font_activated (GTK_FONT_CHOOSER (fontchooser), fontname);
 393   g_free (fontname);
 394 }
 395
 396 static PangoFontDescription *
 397 tree_model_get_font_description (GtkTreeModel *model,
 398                                  GtkTreeIter  *iter)
 399 {
 400   PangoFontDescription *desc;
 401   PangoFontFace *face;
 402   GtkTreeIter child_iter;
 403
 404   gtk_tree_model_get (model, iter,
 405                       FONT_DESC_COLUMN, &desc,
 406                       -1);
 407   if (desc != NULL)
 408     return desc;
 409
 410   gtk_tree_model_get (model, iter,
 411                       FACE_COLUMN, &face,
 412                       -1);
 413   desc = pango_font_face_describe (face);
 414   g_object_unref (face);
 415
 416   if (GTK_IS_TREE_MODEL_FILTER (model))
 417     {
 418       gtk_tree_model_filter_convert_iter_to_child_iter (GTK_TREE_MODEL_FILTER (model),
 419                                                         &child_iter,
 420                                                         iter);
 421       iter = &child_iter;
 422       model = gtk_tree_model_filter_get_model (GTK_TREE_MODEL_FILTER (model));
 423     }
 424
 425   gtk_list_store_set (GTK_LIST_STORE (model), iter,
 426                       FONT_DESC_COLUMN, desc,
 427                       -1);
 428
 429   return desc;
 430 }
 431
 432 static void
 433 cursor_changed_cb (GtkTreeView *treeview,
 434                    gpointer     user_data)
 435 {
 436   GtkFontChooserWidget *fontchooser = user_data;
 437   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 438   PangoFontDescription *desc;
 439   GtkTreeIter filter_iter, iter;
 440   GtkTreePath *path = NULL;
 441
 442   gtk_tree_view_get_cursor (treeview, &path, NULL);
 443
 444   if (!path)
 445     return;
 446
 447   if (!gtk_tree_model_get_iter (priv->filter_model, &filter_iter, path))
 448     {
 449       gtk_tree_path_free (path);
 450       return;
 451     }
 452
 453   gtk_tree_path_free (path);
 454
 455   gtk_tree_model_filter_convert_iter_to_child_iter (GTK_TREE_MODEL_FILTER (priv->filter_model),
 456                                                     &iter,
 457                                                     &filter_iter);
 458   desc = tree_model_get_font_description (priv->model, &iter);
 459
 460   gtk_font_chooser_widget_merge_font_desc (fontchooser, desc, &iter);
 461 }
 462
 463 static gboolean
 464 zoom_preview_cb (GtkWidget      *scrolled_window,
 465                  GdkEventScroll *event,
 466                  gpointer        user_data)
 467 {
 468   GtkFontChooserWidget *fc = user_data;
 469   GtkFontChooserWidgetPrivate *priv = fc->priv;
 470   GtkAdjustment *adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin));
 471
 472   if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_RIGHT)
 473     gtk_adjustment_set_value (adj,
 474                               gtk_adjustment_get_value (adj) +
 475                               gtk_adjustment_get_step_increment (adj));
 476   else if (event->direction == GDK_SCROLL_DOWN || event->direction == GDK_SCROLL_LEFT)
 477     gtk_adjustment_set_value (adj,
 478                               gtk_adjustment_get_value (adj) -
 479                               gtk_adjustment_get_step_increment (adj));
 480   return TRUE;
 481 }
 482
 483 static void
 484 row_inserted_cb (GtkTreeModel *model,
 485                  GtkTreePath  *path,
 486                  GtkTreeIter  *iter,
 487                  gpointer      user_data)
 488 {
 489   GtkFontChooserWidget *fontchooser = user_data;
 490   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 491
 492   gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->list_notebook), 0);
 493 }
 494
 495 static void
 496 row_deleted_cb  (GtkTreeModel *model,
 497                  GtkTreePath  *path,
 498                  gpointer      user_data)
 499 {
 500   GtkFontChooserWidget *fontchooser = user_data;
 501   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 502
 503   if (gtk_tree_model_iter_n_children (model, NULL) == 0)
 504     gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->list_notebook), 1);
 505 }
 506
 507 static void
 508 gtk_font_chooser_widget_init (GtkFontChooserWidget *fontchooser)
 509 {
 510   GIcon *icon;
 511   GtkFontChooserWidgetPrivate *priv;
 512   GtkWidget *scrolled_win;
 513   GtkWidget *grid;
 514
 515   fontchooser->priv = G_TYPE_INSTANCE_GET_PRIVATE (fontchooser,
 516                                                    GTK_TYPE_FONT_CHOOSER_WIDGET,
 517                                                    GtkFontChooserWidgetPrivate);
 518
 519   priv = fontchooser->priv;
 520
 521   /* Default preview string  */
 522   priv->preview_text = g_strdup (pango_language_get_sample_string (NULL));
 523   priv->show_preview_entry = TRUE;
 524   priv->font_desc = pango_font_description_new ();
 525
 526   gtk_widget_push_composite_child ();
 527
 528   /* Creating fundamental widgets for the private struct */
 529   priv->search_entry = gtk_entry_new ();
 530   priv->family_face_list = gtk_tree_view_new ();
 531   gtk_tree_view_set_enable_search (GTK_TREE_VIEW (priv->family_face_list), FALSE);
 532   priv->preview = gtk_entry_new ();
 533   priv->size_slider = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL,
 534                                                 0.0,
 535                                                 (gdouble)(G_MAXINT / PANGO_SCALE),
 536                                                 1.0);
 537
 538   priv->size_spin = gtk_spin_button_new_with_range (0.0, (gdouble)(G_MAXINT / PANGO_SCALE), 1.0);
 539
 540   /** Bootstrapping widget layout **/
 541   gtk_box_set_spacing (GTK_BOX (fontchooser), 6);
 542
 543   /* Main font family/face view */
 544   priv->list_scrolled_window = gtk_scrolled_window_new (NULL, NULL);
 545   scrolled_win = priv->list_scrolled_window;
 546   gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_win),
 547                                   GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 548   gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolled_win),
 549                                        GTK_SHADOW_ETCHED_IN);
 550   gtk_widget_set_size_request (scrolled_win, 400, 300);
 551   gtk_container_add (GTK_CONTAINER (scrolled_win), priv->family_face_list);
 552
 553   /* Text to display when list is empty */
 554   priv->empty_list = gtk_label_new (_(NO_FONT_MATCHED_SEARCH));
 555   gtk_widget_set_margin_top    (priv->empty_list, 12);
 556   gtk_widget_set_margin_left   (priv->empty_list, 12);
 557   gtk_widget_set_margin_right  (priv->empty_list, 12);
 558   gtk_widget_set_margin_bottom (priv->empty_list, 12);
 559   gtk_widget_set_halign (priv->empty_list, GTK_ALIGN_CENTER);
 560   gtk_widget_set_valign (priv->empty_list, GTK_ALIGN_START);
 561
 562   priv->list_notebook = gtk_notebook_new ();
 563   gtk_notebook_set_show_tabs (GTK_NOTEBOOK (priv->list_notebook), FALSE);
 564   gtk_notebook_append_page (GTK_NOTEBOOK (priv->list_notebook), scrolled_win, NULL);
 565   gtk_notebook_append_page (GTK_NOTEBOOK (priv->list_notebook), priv->empty_list, NULL);
 566
 567   /* Basic layout */
 568   grid = gtk_grid_new ();
 569
 570   gtk_grid_set_column_spacing (GTK_GRID (grid), 6);
 571   gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
 572
 573   gtk_grid_attach (GTK_GRID (grid), priv->search_entry, 0, 0, 2, 1);
 574   gtk_grid_attach (GTK_GRID (grid), priv->list_notebook, 0, 1, 2, 1);
 575   gtk_grid_attach (GTK_GRID (grid), priv->preview,      0, 2, 2, 1);
 576
 577   gtk_grid_attach (GTK_GRID (grid), priv->size_slider,  0, 3, 1, 1);
 578   gtk_grid_attach (GTK_GRID (grid), priv->size_spin,    1, 3, 1, 1);
 579
 580   gtk_widget_set_hexpand  (GTK_WIDGET (scrolled_win),      TRUE);
 581   gtk_widget_set_vexpand  (GTK_WIDGET (scrolled_win),      TRUE);
 582   gtk_widget_set_hexpand  (GTK_WIDGET (priv->search_entry), TRUE);
 583
 584   gtk_widget_set_hexpand  (GTK_WIDGET (priv->size_slider), TRUE);
 585   gtk_widget_set_hexpand  (GTK_WIDGET (priv->size_spin),   FALSE);
 586
 587   gtk_box_pack_start (GTK_BOX (fontchooser), grid, TRUE, TRUE, 0);
 588
 589   gtk_widget_show_all (GTK_WIDGET (fontchooser));
 590   gtk_widget_hide     (GTK_WIDGET (fontchooser));
 591
 592   /* Treeview column and model bootstrapping */
 593   gtk_font_chooser_widget_bootstrap_fontlist (fontchooser);
 594
 595   /* Set default preview text */
 596   gtk_entry_set_text (GTK_ENTRY (priv->preview),
 597                       pango_language_get_sample_string (NULL));
 598
 599   /* Set search icon and place holder text */
 600   icon = g_themed_icon_new_with_default_fallbacks ("edit-find-symbolic");
 601   g_object_set (G_OBJECT (priv->search_entry),
 602                 "secondary-icon-gicon", icon,
 603                 "secondary-icon-activatable", FALSE,
 604                 "secondary-icon-sensitive", FALSE,
 605                 NULL);
 606   g_object_unref (icon);
 607
 608   gtk_entry_set_placeholder_text (GTK_ENTRY (priv->search_entry), _("Search font name"));
 609
 610   /** Callback connections **/
 611   g_signal_connect (priv->search_entry, "notify::text",
 612                     G_CALLBACK (text_changed_cb), fontchooser);
 613   g_signal_connect (priv->search_entry,
 614                     "icon-press", G_CALLBACK (icon_press_cb), NULL);
 615
 616   g_signal_connect (gtk_range_get_adjustment (GTK_RANGE (priv->size_slider)),
 617                     "value-changed", G_CALLBACK (size_change_cb), fontchooser);
 618   g_signal_connect (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin)),
 619                     "value-changed", G_CALLBACK (size_change_cb), fontchooser);
 620
 621   g_signal_connect (priv->family_face_list, "cursor-changed",
 622                     G_CALLBACK (cursor_changed_cb), fontchooser);
 623   g_signal_connect (priv->family_face_list, "row-activated",
 624                     G_CALLBACK (row_activated_cb), fontchooser);
 625
 626   /* Zoom on preview scroll */
 627   g_signal_connect (priv->preview, "scroll-event",
 628                     G_CALLBACK (zoom_preview_cb), fontchooser);
 629
 630   g_signal_connect (priv->size_slider, "scroll-event",
 631                     G_CALLBACK (zoom_preview_cb), fontchooser);
 632
 633   /* Font list empty hides the scrolledwindow */
 634   g_signal_connect (G_OBJECT (priv->filter_model), "row-deleted",
 635                     G_CALLBACK (row_deleted_cb), fontchooser);
 636   g_signal_connect (G_OBJECT (priv->filter_model), "row-inserted",
 637                     G_CALLBACK (row_inserted_cb), fontchooser);
 638
 639   /* Set default focus */
 640   gtk_widget_pop_composite_child ();
 641
 642   gtk_font_chooser_widget_take_font_desc (fontchooser, NULL);
 643 }
 644
 645 /**
 646  * gtk_font_chooser_widget_new:
 647  *
 648  * Creates a new #GtkFontChooserWidget.
 649  *
 650  * Return value: a new #GtkFontChooserWidget
 651  *
 652  * Since: 3.2
 653  */
 654 GtkWidget *
 655 gtk_font_chooser_widget_new (void)
 656 {
 657   return g_object_new (GTK_TYPE_FONT_CHOOSER_WIDGET, NULL);
 658 }
 659
 660 static int
 661 cmp_families (const void *a,
 662               const void *b)
 663 {
 664   const char *a_name = pango_font_family_get_name (*(PangoFontFamily **)a);
 665   const char *b_name = pango_font_family_get_name (*(PangoFontFamily **)b);
 666
 667   return g_utf8_collate (a_name, b_name);
 668 }
 669
 670 static void
 671 gtk_font_chooser_widget_load_fonts (GtkFontChooserWidget *fontchooser)
 672 {
 673   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 674   GtkListStore *list_store;
 675   gint n_families, i;
 676   PangoFontFamily **families;
 677   gchar *family_and_face;
 678
 679   list_store = GTK_LIST_STORE (priv->model);
 680
 681   pango_context_list_families (gtk_widget_get_pango_context (GTK_WIDGET (fontchooser)),
 682                                &families,
 683                                &n_families);
 684
 685   qsort (families, n_families, sizeof (PangoFontFamily *), cmp_families);
 686
 687   gtk_list_store_clear (list_store);
 688
 689   /* Iterate over families and faces */
 690   for (i = 0; i < n_families; i++)
 691     {
 692       GtkTreeIter     iter;
 693       PangoFontFace **faces;
 694       int             j, n_faces;
 695       const gchar    *fam_name = pango_font_family_get_name (families[i]);
 696
 697       pango_font_family_list_faces (families[i], &faces, &n_faces);
 698
 699       for (j = 0; j < n_faces; j++)
 700         {
 701           const gchar *face_name;
 702
 703           face_name = pango_font_face_get_face_name (faces[j]);
 704
 705           family_and_face = g_strconcat (fam_name, " ", face_name, NULL);
 706
 707           gtk_list_store_insert_with_values (list_store, &iter, -1,
 708                                              FAMILY_COLUMN, families[i],
 709                                              FACE_COLUMN, faces[j],
 710                                              PREVIEW_TITLE_COLUMN, family_and_face,
 711                                              -1);
 712
 713           g_free (family_and_face);
 714         }
 715
 716       g_free (faces);
 717     }
 718
 719   g_free (families);
 720
 721   /* now make sure the font list looks right */
 722   if (!gtk_font_chooser_widget_find_font (fontchooser,
 723                                           priv->font_desc,
 724                                           &priv->font_iter))
 725     memset (&priv->font_iter, 0, sizeof (GtkTreeIter));
 726
 727   gtk_font_chooser_widget_ensure_selection (fontchooser);
 728 }
 729
 730 static gboolean
 731 visible_func (GtkTreeModel *model,
 732               GtkTreeIter  *iter,
 733               gpointer      user_data)
 734 {
 735   GtkFontChooserWidgetPrivate *priv = user_data;
 736   gboolean result = TRUE;
 737   const gchar *search_text;
 738   gchar **split_terms;
 739   gchar *font_name, *font_name_casefold;
 740   guint i;
 741
 742   if (priv->filter_func != NULL)
 743     {
 744       PangoFontFamily *family;
 745       PangoFontFace *face;
 746
 747       gtk_tree_model_get (model, iter,
 748                           FAMILY_COLUMN, &family,
 749                           FACE_COLUMN, &face,
 750                           -1);
 751
 752       result = priv->filter_func (family, face, priv->filter_data);
 753
 754       g_object_unref (family);
 755       g_object_unref (face);
 756
 757       if (!result)
 758         return FALSE;
 759     }
 760
 761   /* If there's no filter string we show the item */
 762   search_text = gtk_entry_get_text (GTK_ENTRY (priv->search_entry));
 763   if (strlen (search_text) == 0)
 764     return TRUE;
 765
 766   gtk_tree_model_get (model, iter,
 767                       PREVIEW_TITLE_COLUMN, &font_name,
 768                       -1);
 769
 770   if (font_name == NULL)
 771     return FALSE;
 772
 773   split_terms = g_strsplit (search_text, " ", 0);
 774   font_name_casefold = g_utf8_casefold (font_name, -1);
 775
 776   for (i = 0; split_terms[i] && result; i++)
 777     {
 778       gchar* term_casefold = g_utf8_casefold (split_terms[i], -1);
 779
 780       if (!strstr (font_name_casefold, term_casefold))
 781         result = FALSE;
 782
 783       g_free (term_casefold);
 784     }
 785
 786   g_free (font_name_casefold);
 787   g_free (font_name);
 788   g_strfreev (split_terms);
 789
 790   return result;
 791 }
 792
 793 /* in pango units */
 794 static int
 795 gtk_font_chooser_widget_get_preview_text_height (GtkFontChooserWidget *fontchooser)
 796 {
 797   GtkWidget *treeview = fontchooser->priv->family_face_list;
 798   double dpi, font_size;
 799
 800   dpi = gdk_screen_get_resolution (gtk_widget_get_screen (treeview));
 801   gtk_style_context_get (gtk_widget_get_style_context (treeview),
 802                          gtk_widget_get_state_flags (treeview),
 803                          "font-size", &font_size,
 804                          NULL);
 805
 806   return (dpi < 0.0 ? 96.0 : dpi) / 72.0 * PANGO_SCALE_X_LARGE * font_size * PANGO_SCALE;
 807 }
 808
 809 static PangoAttrList *
 810 gtk_font_chooser_widget_get_preview_attributes (GtkFontChooserWidget       *fontchooser,
 811                                                 const PangoFontDescription *font_desc,
 812                                                 gsize                       first_line_len)
 813 {
 814   PangoAttribute *attribute;
 815   PangoAttrList *attrs;
 816
 817   attrs = pango_attr_list_new ();
 818
 819   attribute = pango_attr_weight_new (PANGO_WEIGHT_BOLD);
 820   attribute->end_index = first_line_len;
 821   pango_attr_list_insert (attrs, attribute);
 822
 823   attribute = pango_attr_scale_new (PANGO_SCALE_SMALL);
 824   attribute->end_index = first_line_len;
 825   pango_attr_list_insert (attrs, attribute);
 826
 827   if (font_desc)
 828     {
 829       attribute = pango_attr_font_desc_new (font_desc);
 830       attribute->start_index = first_line_len;
 831       pango_attr_list_insert (attrs, attribute);
 832     }
 833
 834   attribute = pango_attr_fallback_new (FALSE);
 835   attribute->start_index = first_line_len;
 836   pango_attr_list_insert (attrs, attribute);
 837
 838   attribute = pango_attr_size_new_absolute (gtk_font_chooser_widget_get_preview_text_height (fontchooser));
 839   attribute->start_index = first_line_len;
 840   pango_attr_list_insert (attrs, attribute);
 841
 842   return attrs;
 843 }
 844
 845 static void
 846 gtk_font_chooser_widget_cell_data_func (GtkTreeViewColumn *column,
 847                                         GtkCellRenderer   *cell,
 848                                         GtkTreeModel      *tree_model,
 849                                         GtkTreeIter       *iter,
 850                                         gpointer           user_data)
 851 {
 852   GtkFontChooserWidget *fontchooser = user_data;
 853   PangoFontDescription *font_desc;
 854   PangoAttrList *attrs;
 855   char *to_string, *text;
 856   gsize first_line_len;
 857
 858   font_desc = tree_model_get_font_description (tree_model, iter);
 859
 860   to_string = pango_font_description_to_string (font_desc);
 861
 862   text = g_strconcat (to_string, "\n", fontchooser->priv->preview_text, NULL);
 863   first_line_len = strlen (to_string) + 1;
 864
 865   attrs = gtk_font_chooser_widget_get_preview_attributes (fontchooser,
 866                                                           font_desc,
 867                                                           first_line_len);
 868
 869   g_object_set (cell,
 870                 "attributes", attrs,
 871                 "text", text,
 872                 NULL);
 873
 874   pango_font_description_free (font_desc);
 875   pango_attr_list_unref (attrs);
 876   g_free (to_string);
 877   g_free (text);
 878 }
 879
 880 static void
 881 gtk_font_chooser_widget_set_cell_size (GtkFontChooserWidget *fontchooser)
 882 {
 883   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 884   PangoAttrList *attrs;
 885   GtkRequisition size;
 886
 887   gtk_cell_renderer_set_fixed_size (priv->family_face_cell, -1, -1);
 888
 889   attrs = gtk_font_chooser_widget_get_preview_attributes (fontchooser,
 890                                                           NULL,
 891                                                           1);
 892
 893   g_object_set (priv->family_face_cell,
 894                 "attributes", attrs,
 895                 "text", "x\nx",
 896                 NULL);
 897
 898   pango_attr_list_unref (attrs);
 899
 900   gtk_cell_renderer_get_preferred_size (priv->family_face_cell,
 901                                         priv->family_face_list,
 902                                         &size,
 903                                         NULL);
 904   gtk_cell_renderer_set_fixed_size (priv->family_face_cell, size.width, size.height);
 905 }
 906
 907 static void
 908 gtk_font_chooser_widget_bootstrap_fontlist (GtkFontChooserWidget *fontchooser)
 909 {
 910   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 911   GtkTreeView *treeview = GTK_TREE_VIEW (priv->family_face_list);
 912   GtkTreeViewColumn *col;
 913
 914   g_signal_connect_data (priv->family_face_list,
 915                          "style-updated",
 916                          G_CALLBACK (gtk_font_chooser_widget_set_cell_size),
 917                          fontchooser,
 918                          NULL,
 919                          G_CONNECT_AFTER | G_CONNECT_SWAPPED);
 920
 921   priv->model = GTK_TREE_MODEL (gtk_list_store_new (4,
 922                                                     PANGO_TYPE_FONT_FAMILY,
 923                                                     PANGO_TYPE_FONT_FACE,
 924                                                     PANGO_TYPE_FONT_DESCRIPTION,
 925                                                     G_TYPE_STRING));
 926
 927   priv->filter_model = gtk_tree_model_filter_new (priv->model, NULL);
 928   g_object_unref (priv->model);
 929
 930   gtk_tree_model_filter_set_visible_func (GTK_TREE_MODEL_FILTER (priv->filter_model),
 931                                           visible_func, (gpointer)priv, NULL);
 932
 933   gtk_tree_view_set_model (treeview, priv->filter_model);
 934   g_object_unref (priv->filter_model);
 935
 936   gtk_tree_view_set_rules_hint      (treeview, TRUE);
 937   gtk_tree_view_set_headers_visible (treeview, FALSE);
 938   gtk_tree_view_set_fixed_height_mode (treeview, TRUE);
 939
 940   priv->family_face_cell = gtk_cell_renderer_text_new ();
 941   g_object_set (priv->family_face_cell, "ellipsize", PANGO_ELLIPSIZE_END, NULL);
 942
 943   col = gtk_tree_view_column_new ();
 944   gtk_tree_view_column_set_title (col, _("Font Family"));
 945   gtk_tree_view_column_set_sizing (col, GTK_TREE_VIEW_COLUMN_FIXED);
 946   gtk_tree_view_column_pack_start (col, priv->family_face_cell, TRUE);
 947   gtk_tree_view_column_set_cell_data_func (col,
 948                                            priv->family_face_cell,
 949                                            gtk_font_chooser_widget_cell_data_func,
 950                                            fontchooser,
 951                                            NULL);
 952
 953   gtk_tree_view_append_column (treeview, col);
 954
 955   gtk_font_chooser_widget_load_fonts (fontchooser);
 956
 957   gtk_font_chooser_widget_set_cell_size (fontchooser);
 958 }
 959
 960 static void
 961 gtk_font_chooser_widget_finalize (GObject *object)
 962 {
 963   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);
 964   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 965
 966   if (priv->font_desc)
 967     pango_font_description_free (priv->font_desc);
 968
 969   if (priv->filter_data_destroy)
 970     priv->filter_data_destroy (priv->filter_data);
 971
 972   G_OBJECT_CLASS (gtk_font_chooser_widget_parent_class)->finalize (object);
 973 }
 974
 975 static gboolean
 976 my_pango_font_family_equal (const char *familya,
 977                             const char *familyb)
 978 {
 979   return g_ascii_strcasecmp (familya, familyb) == 0;
 980 }
 981
 982 static gboolean
 983 gtk_font_chooser_widget_find_font (GtkFontChooserWidget        *fontchooser,
 984                                    const PangoFontDescription  *font_desc,
 985                                    /* out arguments */
 986                                    GtkTreeIter                 *iter)
 987 {
 988   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 989   PangoFontDescription *desc;
 990   PangoFontFamily *family;
 991   gboolean valid;
 992
 993   if (pango_font_description_get_family (font_desc) == NULL)
 994     return FALSE;
 995
 996   for (valid = gtk_tree_model_get_iter_first (priv->model, iter);
 997        valid;
 998        valid = gtk_tree_model_iter_next (priv->model, iter))
 999     {
1000       gtk_tree_model_get (priv->model, iter,
1001                           FAMILY_COLUMN, &family,
1002                           -1);
1003
1004       if (!my_pango_font_family_equal (pango_font_description_get_family (font_desc),
1005                                        pango_font_family_get_name (family)))
1006         continue;
1007
1008       desc = tree_model_get_font_description (priv->model, iter);
1009
1010       pango_font_description_merge_static (desc, font_desc, FALSE);
1011       if (pango_font_description_equal (desc, font_desc))
1012         break;
1013
1014       pango_font_description_free (desc);
1015     }
1016
1017   return valid;
1018 }
1019
1020 static void
1021 gtk_font_chooser_widget_screen_changed (GtkWidget *widget,
1022                                         GdkScreen *previous_screen)
1023 {
1024   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (widget);
1025
1026   if (GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->screen_changed)
1027     GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->screen_changed (widget, previous_screen);
1028
1029   if (previous_screen == NULL)
1030     previous_screen = gdk_screen_get_default ();
1031
1032   if (previous_screen == gtk_widget_get_screen (widget))
1033     return;
1034
1035   gtk_font_chooser_widget_load_fonts (fontchooser);
1036 }
1037
1038 static PangoFontFamily *
1039 gtk_font_chooser_widget_get_family (GtkFontChooser *chooser)
1040 {
1041   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
1042   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1043   PangoFontFamily *family;
1044
1045   if (!gtk_list_store_iter_is_valid (GTK_LIST_STORE (priv->model), &priv->font_iter))
1046     return NULL;
1047
1048   gtk_tree_model_get (priv->model, &priv->font_iter,
1049                       FAMILY_COLUMN, &family,
1050                       -1);
1051   g_object_unref (family);
1052
1053   return family;
1054 }
1055
1056 static PangoFontFace *
1057 gtk_font_chooser_widget_get_face (GtkFontChooser *chooser)
1058 {
1059   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
1060   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1061   PangoFontFace *face;
1062
1063   if (!gtk_list_store_iter_is_valid (GTK_LIST_STORE (priv->model), &priv->font_iter))
1064     return NULL;
1065
1066   gtk_tree_model_get (priv->model, &priv->font_iter,
1067                       FACE_COLUMN, &face,
1068                       -1);
1069   g_object_unref (face);
1070
1071   return face;
1072 }
1073
1074 static gint
1075 gtk_font_chooser_widget_get_size (GtkFontChooser *chooser)
1076 {
1077   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
1078
1079   return pango_font_description_get_size (fontchooser->priv->font_desc);
1080 }
1081
1082 static gchar *
1083 gtk_font_chooser_widget_get_font (GtkFontChooserWidget *fontchooser)
1084 {
1085   return pango_font_description_to_string (fontchooser->priv->font_desc);
1086 }
1087
1088 static PangoFontDescription *
1089 gtk_font_chooser_widget_get_font_desc (GtkFontChooserWidget *fontchooser)
1090 {
1091   return fontchooser->priv->font_desc;
1092 }
1093
1094 static void
1095 gtk_font_chooser_widget_set_font (GtkFontChooserWidget *fontchooser,
1096                                   const gchar          *fontname)
1097 {
1098   PangoFontDescription *font_desc;
1099
1100   font_desc = pango_font_description_from_string (fontname);
1101   gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc);
1102 }
1103
1104 static void
1105 gtk_font_chooser_widget_ensure_selection (GtkFontChooserWidget *fontchooser)
1106 {
1107   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1108   GtkTreeSelection *selection;
1109   GtkTreeIter filter_iter;
1110
1111   selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->family_face_list));
1112
1113   if (gtk_list_store_iter_is_valid (GTK_LIST_STORE (priv->model), &priv->font_iter) &&
1114       gtk_tree_model_filter_convert_child_iter_to_iter (GTK_TREE_MODEL_FILTER (priv->filter_model),
1115                                                         &filter_iter,
1116                                                         &priv->font_iter))
1117     {
1118       gtk_tree_selection_select_iter (selection, &filter_iter);
1119     }
1120   else
1121     {
1122       gtk_tree_selection_unselect_all (selection);
1123     }
1124 }
1125
1126 static void
1127 gtk_font_chooser_widget_merge_font_desc (GtkFontChooserWidget *fontchooser,
1128                                          PangoFontDescription *font_desc,
1129                                          GtkTreeIter          *iter)
1130 {
1131   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1132   PangoFontMask mask;
1133
1134   g_assert (font_desc != NULL);
1135   /* iter may be NULL if the font doesn't exist on the list */
1136
1137   mask = pango_font_description_get_set_fields (font_desc);
1138
1139   /* sucky test, because we can't restrict the comparison to
1140    * only the parts that actually do get merged */
1141   if (pango_font_description_equal (font_desc, priv->font_desc))
1142     {
1143       pango_font_description_free (font_desc);
1144       return;
1145     }
1146
1147   pango_font_description_merge (priv->font_desc, font_desc, TRUE);
1148
1149   if (mask & PANGO_FONT_MASK_SIZE)
1150     {
1151       double font_size = (double) pango_font_description_get_size (priv->font_desc) / PANGO_SCALE;
1152       /* XXX: This clamps, which can cause it to reloop into here, do we need
1153        * to block its signal handler? */
1154       gtk_range_set_value (GTK_RANGE (priv->size_slider), font_size);
1155       gtk_spin_button_set_value (GTK_SPIN_BUTTON (priv->size_spin), font_size);
1156     }
1157   if (mask & (PANGO_FONT_MASK_FAMILY | PANGO_FONT_MASK_STYLE | PANGO_FONT_MASK_VARIANT |
1158               PANGO_FONT_MASK_WEIGHT | PANGO_FONT_MASK_STRETCH))
1159     {
1160       if (&priv->font_iter != iter)
1161         {
1162           if (iter == NULL)
1163             memset (&priv->font_iter, 0, sizeof (GtkTreeIter));
1164           else
1165             memcpy (&priv->font_iter, iter, sizeof (GtkTreeIter));
1166
1167           gtk_font_chooser_widget_ensure_selection (fontchooser);
1168         }
1169
1170       gtk_font_chooser_widget_update_marks (fontchooser);
1171     }
1172
1173   gtk_widget_override_font (priv->preview, priv->font_desc);
1174
1175   pango_font_description_free (font_desc); /* adopted */
1176
1177   g_object_notify (G_OBJECT (fontchooser), "font");
1178   g_object_notify (G_OBJECT (fontchooser), "font-desc");
1179 }
1180
1181 static void
1182 gtk_font_chooser_widget_take_font_desc (GtkFontChooserWidget *fontchooser,
1183                                         PangoFontDescription *font_desc)
1184 {
1185   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1186   PangoFontMask mask;
1187
1188   if (font_desc == NULL)
1189     font_desc = pango_font_description_from_string (GTK_FONT_CHOOSER_DEFAULT_FONT_NAME);
1190
1191   mask = pango_font_description_get_set_fields (font_desc);
1192   if (mask & (PANGO_FONT_MASK_FAMILY | PANGO_FONT_MASK_STYLE | PANGO_FONT_MASK_VARIANT |
1193               PANGO_FONT_MASK_WEIGHT | PANGO_FONT_MASK_STRETCH))
1194     {
1195       GtkTreeIter iter;
1196
1197       if (gtk_font_chooser_widget_find_font (fontchooser,
1198                                              font_desc,
1199                                              &iter))
1200         {
1201           gtk_font_chooser_widget_merge_font_desc (fontchooser,
1202                                                    font_desc,
1203                                                    &iter);
1204         }
1205       else
1206         {
1207           gtk_font_chooser_widget_merge_font_desc (fontchooser,
1208                                                    font_desc,
1209                                                    NULL);
1210         }
1211     }
1212   else
1213     {
1214       gtk_font_chooser_widget_merge_font_desc (fontchooser,
1215                                                font_desc,
1216                                                &priv->font_iter);
1217
1218     }
1219 }
1220
1221 static const gchar*
1222 gtk_font_chooser_widget_get_preview_text (GtkFontChooserWidget *fontchooser)
1223 {
1224   return fontchooser->priv->preview_text;
1225 }
1226
1227 static void
1228 gtk_font_chooser_widget_set_preview_text (GtkFontChooserWidget *fontchooser,
1229                                           const gchar          *text)
1230 {
1231   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1232
1233   g_free (priv->preview_text);
1234   priv->preview_text = g_strdup (text);
1235
1236   gtk_entry_set_text (GTK_ENTRY (priv->preview), text);
1237
1238   g_object_notify (G_OBJECT (fontchooser), "preview-text");
1239
1240   /* XXX: There's no API to tell the treeview that a column has changed,
1241    * so we just */
1242   gtk_widget_queue_draw (priv->family_face_list);
1243 }
1244
1245 static gboolean
1246 gtk_font_chooser_widget_get_show_preview_entry (GtkFontChooserWidget *fontchooser)
1247 {
1248   return fontchooser->priv->show_preview_entry;
1249 }
1250
1251 static void
1252 gtk_font_chooser_widget_set_show_preview_entry (GtkFontChooserWidget *fontchooser,
1253                                                 gboolean              show_preview_entry)
1254 {
1255   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1256
1257   if (priv->show_preview_entry != show_preview_entry)
1258     {
1259       fontchooser->priv->show_preview_entry = show_preview_entry;
1260
1261       if (show_preview_entry)
1262         gtk_widget_show (fontchooser->priv->preview);
1263       else
1264         gtk_widget_hide (fontchooser->priv->preview);
1265
1266       g_object_notify (G_OBJECT (fontchooser), "show-preview-entry");
1267     }
1268 }
1269
1270 static void
1271 gtk_font_chooser_widget_set_filter_func (GtkFontChooser  *chooser,
1272                                          GtkFontFilterFunc filter,
1273                                          gpointer          data,
1274                                          GDestroyNotify    destroy)
1275 {
1276   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
1277   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1278
1279   if (priv->filter_data_destroy)
1280     priv->filter_data_destroy (priv->filter_data);
1281
1282   priv->filter_func = filter;
1283   priv->filter_data = data;
1284   priv->filter_data_destroy = destroy;
1285
1286   gtk_font_chooser_widget_refilter_font_list (fontchooser);
1287 }
1288
1289 static void
1290 gtk_font_chooser_widget_iface_init (GtkFontChooserIface *iface)
1291 {
1292   iface->get_font_family = gtk_font_chooser_widget_get_family;
1293   iface->get_font_face = gtk_font_chooser_widget_get_face;
1294   iface->get_font_size = gtk_font_chooser_widget_get_size;
1295   iface->set_filter_func = gtk_font_chooser_widget_set_filter_func;
1296 }