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, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include "config.h"
  21
  22 #include <stdlib.h>
  23 #include <glib/gprintf.h>
  24 #include <string.h>
  25
  26 #include <atk/atk.h>
  27
  28 #include "gtkfontchooserwidget.h"
  29 #include "gtkfontchooser.h"
  30 #include "gtkfontchooserutils.h"
  31 #include "gtkcellrenderertext.h"
  32 #include "gtkentry.h"
  33 #include "gtkframe.h"
  34 #include "gtkbbox.h"
  35 #include "gtkbox.h"
  36 #include "gtklabel.h"
  37 #include "gtkliststore.h"
  38 #include "gtkstock.h"
  39 #include "gtktextview.h"
  40 #include "gtktreeselection.h"
  41 #include "gtktreeview.h"
  42 #include "gtkscrolledwindow.h"
  43 #include "gtkintl.h"
  44 #include "gtkaccessible.h"
  45 #include "gtkbuildable.h"
  46 #include "gtkprivate.h"
  47 #include "gtkscale.h"
  48 #include "gtkspinbutton.h"
  49 #include "gtknotebook.h"
  50 #include "gtkwidget.h"
  51 #include "gtkgrid.h"
  52
  53 /**
  54  * SECTION:gtkfontchooser
  55  * @Short_description: A widget for selecting fonts
  56  * @Title: GtkFontChooserWidget
  57  * @See_also: #GtkFontChooserDialog
  58  *
  59  * The #GtkFontChooserWidget widget lists the available fonts,
  60  * styles and sizes, allowing the user to select a font. It is
  61  * used in the #GtkFontChooserDialog widget to provide a
  62  * dialog box for selecting fonts.
  63  *
  64  * To set the font which is initially selected, use
  65  * gtk_font_chooser_set_font() or gtk_font_chooser_set_font_desc().
  66  *
  67  * To get the selected font use gtk_font_chooser_get_font() or
  68  * gtk_font_chooser_get_font_desc().
  69  *
  70  * To change the text which is shown in the preview area, use
  71  * gtk_font_chooser_set_preview_text().
  72  *
  73  * Since: 3.2
  74  */
  75
  76
  77 struct _GtkFontChooserWidgetPrivate
  78 {
  79   GtkWidget    *search_entry;
  80   GtkWidget    *family_face_list;
  81   GtkWidget    *list_scrolled_window;
  82   GtkWidget    *empty_list;
  83   GtkWidget    *list_notebook;
  84   GtkListStore *model;
  85   GtkTreeModel *filter_model;
  86
  87   GtkWidget       *preview;
  88   gchar           *preview_text;
  89   gboolean         show_preview_entry;
  90
  91   GtkWidget *size_spin;
  92   GtkWidget *size_slider;
  93
  94   PangoFontDescription *font_desc;
  95   PangoFontFace   *face;
  96   PangoFontFamily *family;
  97
  98   GtkFontFilterFunc filter_func;
  99   gpointer          filter_data;
 100   GDestroyNotify    filter_data_destroy;
 101 };
 102
 103 /* This is the initial fixed height and the top padding of the preview entry */
 104 #define PREVIEW_HEIGHT 72
 105 #define PREVIEW_TOP_PADDING 6
 106
 107 /* These are the sizes of the font, style & size lists. */
 108 #define FONT_LIST_HEIGHT  136
 109 #define FONT_LIST_WIDTH   190
 110 #define FONT_STYLE_LIST_WIDTH 170
 111 #define FONT_SIZE_LIST_WIDTH  60
 112
 113 #define ROW_FORMAT_STRING "<span weight=\"bold\" size=\"small\">%s</span>\n<span size=\"x-large\" font_desc=\"%s\">%s</span>"
 114
 115 #define NO_FONT_MATCHED_SEARCH N_("No fonts matched your search. You can revise your search and try again.")
 116
 117 /* These are what we use as the standard font sizes, for the size list.
 118  */
 119 static const gint font_sizes[] = {
 120   6, 8, 9, 10, 11, 12, 13, 14, 16, 20, 24, 36, 48, 72
 121 };
 122
 123 enum {
 124   FAMILY_COLUMN,
 125   FACE_COLUMN,
 126   FONT_DESC_COLUMN,
 127   PREVIEW_TEXT_COLUMN,
 128   PREVIEW_TITLE_COLUMN
 129 };
 130
 131 static void gtk_font_chooser_widget_set_property         (GObject         *object,
 132                                                           guint            prop_id,
 133                                                           const GValue    *value,
 134                                                           GParamSpec      *pspec);
 135 static void gtk_font_chooser_widget_get_property         (GObject         *object,
 136                                                           guint            prop_id,
 137                                                           GValue          *value,
 138                                                           GParamSpec      *pspec);
 139 static void gtk_font_chooser_widget_finalize             (GObject         *object);
 140
 141 static void gtk_font_chooser_widget_screen_changed       (GtkWidget       *widget,
 142                                                           GdkScreen       *previous_screen);
 143
 144 static void gtk_font_chooser_widget_bootstrap_fontlist   (GtkFontChooserWidget *fontchooser);
 145
 146 static void gtk_font_chooser_widget_select_font          (GtkFontChooserWidget *fontchooser);
 147
 148 static gchar   *gtk_font_chooser_widget_get_font         (GtkFontChooserWidget *fontchooser);
 149 static void     gtk_font_chooser_widget_set_font         (GtkFontChooserWidget *fontchooser,
 150                                                           const gchar          *fontname);
 151
 152 static PangoFontDescription *gtk_font_chooser_widget_get_font_desc  (GtkFontChooserWidget *fontchooser);
 153 static void                  gtk_font_chooser_widget_take_font_desc (GtkFontChooserWidget *fontchooser,
 154                                                                      PangoFontDescription *font_desc);
 155
 156
 157 static const gchar *gtk_font_chooser_widget_get_preview_text (GtkFontChooserWidget *fontchooser);
 158 static void         gtk_font_chooser_widget_set_preview_text (GtkFontChooserWidget *fontchooser,
 159                                                               const gchar          *text);
 160
 161 static gboolean gtk_font_chooser_widget_get_show_preview_entry (GtkFontChooserWidget *fontchooser);
 162 static void     gtk_font_chooser_widget_set_show_preview_entry (GtkFontChooserWidget *fontchooser,
 163                                                                 gboolean              show_preview_entry);
 164
 165 static void gtk_font_chooser_widget_iface_init (GtkFontChooserIface *iface);
 166
 167 G_DEFINE_TYPE_WITH_CODE (GtkFontChooserWidget, gtk_font_chooser_widget, GTK_TYPE_BOX,
 168                          G_IMPLEMENT_INTERFACE (GTK_TYPE_FONT_CHOOSER,
 169                                                 gtk_font_chooser_widget_iface_init))
 170
 171 static void
 172 gtk_font_chooser_widget_class_init (GtkFontChooserWidgetClass *klass)
 173 {
 174   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 175   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 176
 177   widget_class->screen_changed = gtk_font_chooser_widget_screen_changed;
 178
 179   gobject_class->finalize = gtk_font_chooser_widget_finalize;
 180   gobject_class->set_property = gtk_font_chooser_widget_set_property;
 181   gobject_class->get_property = gtk_font_chooser_widget_get_property;
 182
 183   _gtk_font_chooser_install_properties (gobject_class);
 184
 185   g_type_class_add_private (klass, sizeof (GtkFontChooserWidgetPrivate));
 186 }
 187
 188 static void
 189 gtk_font_chooser_widget_set_property (GObject         *object,
 190                                       guint            prop_id,
 191                                       const GValue    *value,
 192                                       GParamSpec      *pspec)
 193 {
 194   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);
 195
 196   switch (prop_id)
 197     {
 198     case GTK_FONT_CHOOSER_PROP_FONT:
 199       gtk_font_chooser_widget_set_font (fontchooser, g_value_get_string (value));
 200       break;
 201     case GTK_FONT_CHOOSER_PROP_FONT_DESC:
 202       gtk_font_chooser_widget_take_font_desc (fontchooser, g_value_dup_boxed (value));
 203       break;
 204     case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT:
 205       gtk_font_chooser_widget_set_preview_text (fontchooser, g_value_get_string (value));
 206       break;
 207     case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY:
 208       gtk_font_chooser_widget_set_show_preview_entry (fontchooser, g_value_get_boolean (value));
 209       break;
 210     default:
 211       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 212       break;
 213     }
 214 }
 215
 216 static void
 217 gtk_font_chooser_widget_get_property (GObject         *object,
 218                                       guint            prop_id,
 219                                       GValue          *value,
 220                                       GParamSpec      *pspec)
 221 {
 222   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);
 223
 224   switch (prop_id)
 225     {
 226     case GTK_FONT_CHOOSER_PROP_FONT:
 227       g_value_take_string (value, gtk_font_chooser_widget_get_font (fontchooser));
 228       break;
 229     case GTK_FONT_CHOOSER_PROP_FONT_DESC:
 230       g_value_set_boxed (value, gtk_font_chooser_widget_get_font_desc (fontchooser));
 231       break;
 232     case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT:
 233       g_value_set_string (value, gtk_font_chooser_widget_get_preview_text (fontchooser));
 234       break;
 235     case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY:
 236       g_value_set_boolean (value, gtk_font_chooser_widget_get_show_preview_entry (fontchooser));
 237       break;
 238     default:
 239       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 240       break;
 241     }
 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_tree_model_filter_refilter (GTK_TREE_MODEL_FILTER (priv->filter_model));
 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 set_range_marks (GtkFontChooserWidgetPrivate *priv,
 314                  GtkWidget             *size_slider,
 315                  gint                  *sizes,
 316                  gint                   length)
 317 {
 318   GtkAdjustment *adj;
 319   gint i;
 320   gdouble value;
 321
 322   if (length < 2)
 323     {
 324       sizes = (gint*)font_sizes;
 325       length = G_N_ELEMENTS (font_sizes);
 326     }
 327
 328   gtk_scale_clear_marks (GTK_SCALE (size_slider));
 329
 330   adj = gtk_range_get_adjustment(GTK_RANGE (size_slider));
 331
 332   gtk_adjustment_set_lower (adj, (gdouble) sizes[0]);
 333   gtk_adjustment_set_upper (adj, (gdouble) sizes[length-1]);
 334
 335   value = gtk_adjustment_get_value (adj);
 336   if (value > (gdouble) sizes[length-1])
 337     gtk_adjustment_set_value (adj, (gdouble) sizes[length-1]);
 338   else if (value < (gdouble) sizes[0])
 339     gtk_adjustment_set_value (adj, (gdouble) sizes[0]);
 340
 341   for (i = 0; i < length; i++)
 342     gtk_scale_add_mark (GTK_SCALE (size_slider),
 343                         (gdouble) sizes[i],
 344                         GTK_POS_BOTTOM, NULL);
 345 }
 346
 347 static void
 348 row_activated_cb (GtkTreeView       *view,
 349                   GtkTreePath       *path,
 350                   GtkTreeViewColumn *column,
 351                   gpointer           user_data)
 352 {
 353   GtkFontChooserWidget *fontchooser = user_data;
 354   gchar *fontname;
 355
 356   fontname = gtk_font_chooser_widget_get_font (fontchooser);
 357   _gtk_font_chooser_font_activated (GTK_FONT_CHOOSER (fontchooser), fontname);
 358   g_free (fontname);
 359 }
 360
 361 static void
 362 cursor_changed_cb (GtkTreeView *treeview,
 363                    gpointer     user_data)
 364 {
 365   GtkFontChooserWidget *fontchooser = (GtkFontChooserWidget*)user_data;
 366   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 367
 368   PangoFontFamily      *family;
 369   PangoFontFace        *face;
 370   PangoFontDescription *desc;
 371
 372   gint *sizes;
 373   gint  i, n_sizes;
 374
 375   GtkTreeIter  iter;
 376   GtkTreePath *path = gtk_tree_path_new ();
 377
 378   gtk_tree_view_get_cursor (treeview, &path, NULL);
 379
 380   if (!path)
 381     return;
 382
 383   if (!gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->filter_model), &iter, path))
 384     {
 385       gtk_tree_path_free (path);
 386       return;
 387     }
 388
 389   gtk_tree_model_get (GTK_TREE_MODEL (priv->filter_model), &iter,
 390                       FACE_COLUMN, &face,
 391                       FAMILY_COLUMN, &family,
 392                       -1);
 393
 394   gtk_tree_path_free (path);
 395   path = NULL;
 396
 397   desc = pango_font_face_describe (face);
 398   pango_font_description_set_size (desc, pango_font_description_get_size (priv->font_desc));
 399   gtk_widget_override_font (priv->preview, desc);
 400
 401   pango_font_face_list_sizes (face, &sizes, &n_sizes);
 402   /* It seems not many fonts actually have a sane set of sizes */
 403   for (i = 0; i < n_sizes; i++)
 404     sizes[i] = sizes[i] / PANGO_SCALE;
 405
 406   set_range_marks (priv, priv->size_slider, sizes, n_sizes);
 407
 408   if (priv->family)
 409     g_object_unref (priv->family);
 410   priv->family = family;
 411
 412   if (priv->face)
 413     g_object_unref (priv->face);
 414   priv->face = face;
 415
 416   if (priv->font_desc)
 417     pango_font_description_free (priv->font_desc);
 418   priv->font_desc = desc;
 419
 420   g_object_notify (G_OBJECT (fontchooser), "font");
 421   g_object_notify (G_OBJECT (fontchooser), "font-desc");
 422 }
 423
 424 static gboolean
 425 zoom_preview_cb (GtkWidget      *scrolled_window,
 426                  GdkEventScroll *event,
 427                  gpointer        user_data)
 428 {
 429   GtkFontChooserWidget        *fc    = (GtkFontChooserWidget*)user_data;
 430   GtkFontChooserWidgetPrivate *priv  = fc->priv;
 431
 432   GtkAdjustment *adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin));
 433
 434   if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_RIGHT)
 435     gtk_adjustment_set_value (adj,
 436                               gtk_adjustment_get_value (adj) +
 437                               gtk_adjustment_get_step_increment (adj));
 438   else if (event->direction == GDK_SCROLL_DOWN || event->direction == GDK_SCROLL_LEFT)
 439     gtk_adjustment_set_value (adj,
 440                               gtk_adjustment_get_value (adj) -
 441                               gtk_adjustment_get_step_increment (adj));
 442   return TRUE;
 443 }
 444
 445 static void
 446 row_inserted_cb (GtkTreeModel *model,
 447                  GtkTreePath  *path,
 448                  GtkTreeIter  *iter,
 449                  gpointer      user_data)
 450 {
 451   GtkFontChooserWidget        *fontchooser = (GtkFontChooserWidget*)user_data;
 452   GtkFontChooserWidgetPrivate *priv        = fontchooser->priv;
 453
 454   gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->list_notebook), 0);
 455 }
 456
 457 static void
 458 row_deleted_cb  (GtkTreeModel *model,
 459                  GtkTreePath  *path,
 460                  gpointer      user_data)
 461 {
 462   GtkFontChooserWidget        *fontchooser = (GtkFontChooserWidget*)user_data;
 463   GtkFontChooserWidgetPrivate *priv        = fontchooser->priv;
 464
 465   if (gtk_tree_model_iter_n_children (model, NULL) == 0)
 466     gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->list_notebook), 1);
 467 }
 468
 469 static void
 470 gtk_font_chooser_widget_init (GtkFontChooserWidget *fontchooser)
 471 {
 472   GIcon                   *icon;
 473   GtkFontChooserWidgetPrivate   *priv;
 474   GtkWidget               *scrolled_win;
 475   GtkWidget               *grid;
 476
 477   fontchooser->priv = G_TYPE_INSTANCE_GET_PRIVATE (fontchooser,
 478                                                    GTK_TYPE_FONT_CHOOSER_WIDGET,
 479                                                    GtkFontChooserWidgetPrivate);
 480
 481   priv = fontchooser->priv;
 482
 483   /* Default preview string  */
 484   priv->preview_text = g_strdup (pango_language_get_sample_string (NULL));
 485   priv->show_preview_entry = TRUE;
 486   priv->font_desc = pango_font_description_new ();
 487
 488   gtk_widget_push_composite_child ();
 489
 490   /* Creating fundamental widgets for the private struct */
 491   priv->search_entry = gtk_entry_new ();
 492   priv->family_face_list = gtk_tree_view_new ();
 493   priv->preview = gtk_entry_new ();
 494   priv->size_slider = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL,
 495                                                 (gdouble) font_sizes[0],
 496                                                 (gdouble) font_sizes[G_N_ELEMENTS (font_sizes) - 1],
 497                                                 1.0);
 498
 499   priv->size_spin = gtk_spin_button_new_with_range (0.0, (gdouble)(G_MAXINT / PANGO_SCALE), 1.0);
 500
 501   /** Bootstrapping widget layout **/
 502   gtk_box_set_spacing (GTK_BOX (fontchooser), 6);
 503
 504   /* Main font family/face view */
 505   priv->list_scrolled_window = gtk_scrolled_window_new (NULL, NULL);
 506   scrolled_win = priv->list_scrolled_window;
 507   gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_win),
 508                                   GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 509   gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolled_win),
 510                                        GTK_SHADOW_ETCHED_IN);
 511   gtk_widget_set_size_request (scrolled_win, 400, 300);
 512   gtk_container_add (GTK_CONTAINER (scrolled_win), priv->family_face_list);
 513
 514   /* Text to display when list is empty */
 515   priv->empty_list = gtk_label_new (_(NO_FONT_MATCHED_SEARCH));
 516   gtk_widget_set_margin_top    (priv->empty_list, 12);
 517   gtk_widget_set_margin_left   (priv->empty_list, 12);
 518   gtk_widget_set_margin_right  (priv->empty_list, 12);
 519   gtk_widget_set_margin_bottom (priv->empty_list, 12);
 520   gtk_widget_set_halign (priv->empty_list, GTK_ALIGN_CENTER);
 521   gtk_widget_set_valign (priv->empty_list, GTK_ALIGN_START);
 522
 523   priv->list_notebook = gtk_notebook_new ();
 524   gtk_notebook_set_show_tabs (GTK_NOTEBOOK (priv->list_notebook), FALSE);
 525   gtk_notebook_append_page (GTK_NOTEBOOK (priv->list_notebook), scrolled_win, NULL);
 526   gtk_notebook_append_page (GTK_NOTEBOOK (priv->list_notebook), priv->empty_list, NULL);
 527
 528   /* Basic layout */
 529   grid = gtk_grid_new ();
 530
 531   gtk_grid_set_column_spacing (GTK_GRID (grid), 6);
 532   gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
 533
 534   gtk_grid_attach (GTK_GRID (grid), priv->search_entry, 0, 0, 2, 1);
 535   gtk_grid_attach (GTK_GRID (grid), priv->list_notebook, 0, 1, 2, 1);
 536   gtk_grid_attach (GTK_GRID (grid), priv->preview,      0, 2, 2, 1);
 537
 538   gtk_grid_attach (GTK_GRID (grid), priv->size_slider,  0, 3, 1, 1);
 539   gtk_grid_attach (GTK_GRID (grid), priv->size_spin,    1, 3, 1, 1);
 540
 541   gtk_widget_set_hexpand  (GTK_WIDGET (scrolled_win),      TRUE);
 542   gtk_widget_set_vexpand  (GTK_WIDGET (scrolled_win),      TRUE);
 543   gtk_widget_set_hexpand  (GTK_WIDGET (priv->search_entry), TRUE);
 544
 545   gtk_widget_set_hexpand  (GTK_WIDGET (priv->size_slider), TRUE);
 546   gtk_widget_set_hexpand  (GTK_WIDGET (priv->size_spin),   FALSE);
 547
 548   gtk_box_pack_start (GTK_BOX (fontchooser), grid, TRUE, TRUE, 0);
 549
 550   gtk_widget_show_all (GTK_WIDGET (fontchooser));
 551   gtk_widget_hide     (GTK_WIDGET (fontchooser));
 552
 553   /* Treeview column and model bootstrapping */
 554   gtk_font_chooser_widget_bootstrap_fontlist (fontchooser);
 555
 556   /* Set default preview text */
 557   gtk_entry_set_text (GTK_ENTRY (priv->preview),
 558                       pango_language_get_sample_string (NULL));
 559
 560   /* Set search icon and place holder text */
 561   icon = g_themed_icon_new_with_default_fallbacks ("edit-find-symbolic");
 562   g_object_set (G_OBJECT (priv->search_entry),
 563                 "secondary-icon-gicon", icon,
 564                 "secondary-icon-activatable", FALSE,
 565                 "secondary-icon-sensitive", FALSE,
 566                 NULL);
 567   g_object_unref (icon);
 568
 569   gtk_entry_set_placeholder_text (GTK_ENTRY (priv->search_entry), _("Search font name"));
 570
 571   /** Callback connections **/
 572   g_signal_connect (priv->search_entry, "notify::text",
 573                     G_CALLBACK (text_changed_cb), fontchooser);
 574   g_signal_connect (priv->search_entry,
 575                     "icon-press", G_CALLBACK (icon_press_cb), NULL);
 576
 577   g_signal_connect (gtk_range_get_adjustment (GTK_RANGE (priv->size_slider)),
 578                     "value-changed", G_CALLBACK (size_change_cb), fontchooser);
 579   g_signal_connect (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin)),
 580                     "value-changed", G_CALLBACK (size_change_cb), fontchooser);
 581
 582   g_signal_connect (priv->family_face_list, "cursor-changed",
 583                     G_CALLBACK (cursor_changed_cb), fontchooser);
 584   g_signal_connect (priv->family_face_list, "row-activated",
 585                     G_CALLBACK (row_activated_cb), fontchooser);
 586
 587   /* Zoom on preview scroll */
 588   g_signal_connect (priv->preview, "scroll-event",
 589                     G_CALLBACK (zoom_preview_cb), fontchooser);
 590
 591   g_signal_connect (priv->size_slider, "scroll-event",
 592                     G_CALLBACK (zoom_preview_cb), fontchooser);
 593
 594   set_range_marks (priv, priv->size_slider, (gint*)font_sizes, G_N_ELEMENTS (font_sizes));
 595
 596   /* Font list empty hides the scrolledwindow */
 597   g_signal_connect (G_OBJECT (priv->filter_model), "row-deleted",
 598                     G_CALLBACK (row_deleted_cb), fontchooser);
 599   g_signal_connect (G_OBJECT (priv->filter_model), "row-inserted",
 600                     G_CALLBACK (row_inserted_cb), fontchooser);
 601
 602   /* Set default focus */
 603   gtk_widget_pop_composite_child ();
 604
 605   gtk_font_chooser_widget_take_font_desc (fontchooser, NULL);
 606 }
 607
 608 /**
 609  * gtk_font_chooser_widget_new:
 610  *
 611  * Creates a new #GtkFontChooserWidget.
 612  *
 613  * Return value: a new #GtkFontChooserWidget
 614  *
 615  * Since: 3.2
 616  */
 617 GtkWidget *
 618 gtk_font_chooser_widget_new (void)
 619 {
 620   return g_object_new (GTK_TYPE_FONT_CHOOSER_WIDGET, NULL);
 621 }
 622
 623 static int
 624 cmp_families (const void *a,
 625               const void *b)
 626 {
 627   const char *a_name = pango_font_family_get_name (*(PangoFontFamily **)a);
 628   const char *b_name = pango_font_family_get_name (*(PangoFontFamily **)b);
 629
 630   return g_utf8_collate (a_name, b_name);
 631 }
 632
 633 static void
 634 populate_list (GtkFontChooserWidget *fontchooser,
 635                GtkTreeView    *treeview,
 636                GtkListStore   *model)
 637 {
 638   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 639   gint n_families, i;
 640   PangoFontFamily **families;
 641   gchar *tmp;
 642   gchar *family_and_face;
 643
 644   pango_context_list_families (gtk_widget_get_pango_context (GTK_WIDGET (treeview)),
 645                                &families,
 646                                &n_families);
 647
 648   qsort (families, n_families, sizeof (PangoFontFamily *), cmp_families);
 649
 650   gtk_list_store_clear (model);
 651
 652   /* Iterate over families and faces */
 653   for (i = 0; i < n_families; i++)
 654     {
 655       GtkTreeIter     iter;
 656       PangoFontFace **faces;
 657       int             j, n_faces;
 658       const gchar    *fam_name = pango_font_family_get_name (families[i]);
 659
 660       pango_font_family_list_faces (families[i], &faces, &n_faces);
 661
 662       for (j = 0; j < n_faces; j++)
 663         {
 664           PangoFontDescription *pango_desc;
 665           const gchar *face_name;
 666           gchar *font_desc;
 667
 668           pango_desc = pango_font_face_describe (faces[j]);
 669           face_name = pango_font_face_get_face_name (faces[j]);
 670           font_desc = pango_font_description_to_string (pango_desc);
 671
 672           family_and_face = g_strconcat (fam_name, " ", face_name, NULL);
 673           tmp = g_markup_printf_escaped (ROW_FORMAT_STRING,
 674                                          family_and_face,
 675                                          font_desc,
 676                                          fontchooser->priv->preview_text);
 677
 678           gtk_list_store_insert_with_values (model, &iter, -1,
 679                                              FAMILY_COLUMN, families[i],
 680                                              FACE_COLUMN, faces[j],
 681                                              FONT_DESC_COLUMN, pango_desc,
 682                                              PREVIEW_TITLE_COLUMN, family_and_face,
 683                                              PREVIEW_TEXT_COLUMN, tmp,
 684                                              -1);
 685
 686           pango_font_description_free (pango_desc);
 687           g_free (family_and_face);
 688           g_free (tmp);
 689           g_free (font_desc);
 690         }
 691
 692       g_free (faces);
 693     }
 694
 695   g_free (families);
 696 }
 697
 698 static gboolean
 699 visible_func (GtkTreeModel *model,
 700               GtkTreeIter  *iter,
 701               gpointer      user_data)
 702 {
 703   GtkFontChooserWidgetPrivate *priv = user_data;
 704   gboolean result = TRUE;
 705   const gchar *search_text;
 706   gchar **split_terms;
 707   gchar *font_name, *font_name_casefold;
 708   guint i;
 709
 710   if (priv->filter_func != NULL)
 711     {
 712       PangoFontFamily *family;
 713       PangoFontFace *face;
 714
 715       gtk_tree_model_get (model, iter,
 716                           FAMILY_COLUMN, &family,
 717                           FACE_COLUMN, &face,
 718                           -1);
 719
 720       result = priv->filter_func (family, face, priv->filter_data);
 721
 722       g_object_unref (family);
 723       g_object_unref (face);
 724
 725       if (!result)
 726         return FALSE;
 727     }
 728
 729   /* If there's no filter string we show the item */
 730   search_text = gtk_entry_get_text (GTK_ENTRY (priv->search_entry));
 731   if (strlen (search_text) == 0)
 732     return TRUE;
 733
 734   gtk_tree_model_get (model, iter,
 735                       PREVIEW_TITLE_COLUMN, &font_name,
 736                       -1);
 737
 738   if (font_name == NULL)
 739     return FALSE;
 740
 741   split_terms = g_strsplit (search_text, " ", 0);
 742   font_name_casefold = g_utf8_casefold (font_name, -1);
 743
 744   for (i = 0; split_terms[i] && result; i++)
 745     {
 746       gchar* term_casefold = g_utf8_casefold (split_terms[i], -1);
 747
 748       if (!strstr (font_name_casefold, term_casefold))
 749         result = FALSE;
 750
 751       g_free (term_casefold);
 752     }
 753
 754   g_free (font_name_casefold);
 755   g_free (font_name);
 756   g_strfreev (split_terms);
 757
 758   return result;
 759 }
 760
 761 static void
 762 gtk_font_chooser_widget_bootstrap_fontlist (GtkFontChooserWidget *fontchooser)
 763 {
 764   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 765   GtkTreeView       *treeview = GTK_TREE_VIEW (priv->family_face_list);
 766   GtkCellRenderer   *cell;
 767   GtkTreeViewColumn *col;
 768
 769   priv->model = gtk_list_store_new (5,
 770                                     PANGO_TYPE_FONT_FAMILY,
 771                                     PANGO_TYPE_FONT_FACE,
 772                                     PANGO_TYPE_FONT_DESCRIPTION,
 773                                     G_TYPE_STRING,
 774                                     G_TYPE_STRING);
 775
 776   priv->filter_model = gtk_tree_model_filter_new (GTK_TREE_MODEL (priv->model), NULL);
 777   g_object_unref (priv->model);
 778
 779   gtk_tree_model_filter_set_visible_func (GTK_TREE_MODEL_FILTER (priv->filter_model),
 780                                           visible_func, (gpointer)priv, NULL);
 781
 782   gtk_tree_view_set_model (treeview, GTK_TREE_MODEL (priv->filter_model));
 783   g_object_unref (priv->filter_model);
 784
 785   gtk_tree_view_set_rules_hint      (treeview, TRUE);
 786   gtk_tree_view_set_headers_visible (treeview, FALSE);
 787
 788   cell = gtk_cell_renderer_text_new ();
 789   col = gtk_tree_view_column_new_with_attributes (_("Font Family"),
 790                                                   cell,
 791                                                   "markup", PREVIEW_TEXT_COLUMN,
 792                                                   NULL);
 793
 794   g_object_set (cell, "ellipsize", PANGO_ELLIPSIZE_END, NULL);
 795
 796   gtk_tree_view_append_column (treeview, col);
 797
 798   populate_list (fontchooser, treeview, priv->model);
 799 }
 800
 801 static void
 802 gtk_font_chooser_widget_finalize (GObject *object)
 803 {
 804   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);
 805   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 806
 807   if (priv->font_desc)
 808     pango_font_description_free (priv->font_desc);
 809
 810   if (priv->family)
 811     g_object_unref (priv->family);
 812
 813   if (priv->face)
 814     g_object_unref (priv->face);
 815
 816   if (priv->filter_data_destroy)
 817     priv->filter_data_destroy (priv->filter_data);
 818
 819   G_OBJECT_CLASS (gtk_font_chooser_widget_parent_class)->finalize (object);
 820 }
 821
 822 static gboolean
 823 gtk_font_chooser_widget_find_font (GtkFontChooserWidget        *fontchooser,
 824                                    const PangoFontDescription  *font_desc,
 825                                    /* out arguments */
 826                                    GtkTreeIter                 *iter,
 827                                    PangoFontFamily            **family,
 828                                    PangoFontFace              **face)
 829 {
 830   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 831   PangoFontDescription *desc;
 832   gboolean valid;
 833
 834   for (valid = gtk_tree_model_get_iter_first (GTK_TREE_MODEL (priv->model), iter);
 835        valid;
 836        valid = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->model), iter))
 837     {
 838       gtk_tree_model_get (GTK_TREE_MODEL (priv->model), iter,
 839                           FACE_COLUMN, face,
 840                           FAMILY_COLUMN, family,
 841                           FONT_DESC_COLUMN, &desc,
 842                           -1);
 843
 844       pango_font_description_merge_static (desc, font_desc, FALSE);
 845       if (pango_font_description_equal (desc, font_desc))
 846         break;
 847
 848       g_object_unref (face);
 849       g_object_unref (family);
 850       pango_font_description_free (desc);
 851     }
 852
 853   return valid;
 854 }
 855
 856 static void
 857 gtk_font_chooser_widget_screen_changed (GtkWidget *widget,
 858                                         GdkScreen *previous_screen)
 859 {
 860   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (widget);
 861   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 862
 863   if (GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->screen_changed)
 864     GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->screen_changed (widget, previous_screen);
 865
 866   if (previous_screen == NULL)
 867     previous_screen = gdk_screen_get_default ();
 868
 869   if (previous_screen == gtk_widget_get_screen (widget))
 870     return;
 871
 872   populate_list (fontchooser,
 873                  GTK_TREE_VIEW (priv->family_face_list),
 874                  priv->model);
 875
 876   gtk_font_chooser_widget_select_font (fontchooser);
 877 }
 878
 879 static PangoFontFamily *
 880 gtk_font_chooser_widget_get_family (GtkFontChooser *chooser)
 881 {
 882   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
 883
 884   return fontchooser->priv->family;
 885 }
 886
 887 static PangoFontFace *
 888 gtk_font_chooser_widget_get_face (GtkFontChooser *chooser)
 889 {
 890   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
 891
 892   return fontchooser->priv->face;
 893 }
 894
 895 static gint
 896 gtk_font_chooser_widget_get_size (GtkFontChooser *chooser)
 897 {
 898   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
 899
 900   return pango_font_description_get_size (fontchooser->priv->font_desc);
 901 }
 902
 903 static gchar *
 904 gtk_font_chooser_widget_get_font (GtkFontChooserWidget *fontchooser)
 905 {
 906   return pango_font_description_to_string (fontchooser->priv->font_desc);
 907 }
 908
 909 static PangoFontDescription *
 910 gtk_font_chooser_widget_get_font_desc (GtkFontChooserWidget *fontchooser)
 911 {
 912   return fontchooser->priv->font_desc;
 913 }
 914
 915 static void
 916 gtk_font_chooser_widget_set_font (GtkFontChooserWidget *fontchooser,
 917                                   const gchar          *fontname)
 918 {
 919   PangoFontDescription *font_desc;
 920
 921   font_desc = pango_font_description_from_string (fontname);
 922   gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc);
 923 }
 924
 925 static void
 926 gtk_font_chooser_widget_take_font_desc (GtkFontChooserWidget *fontchooser,
 927                                         PangoFontDescription *font_desc)
 928 {
 929   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 930   PangoFontMask mask;
 931
 932   if (font_desc && priv->font_desc &&
 933       pango_font_description_equal (font_desc, priv->font_desc))
 934     {
 935       pango_font_description_free (font_desc);
 936       return;
 937     }
 938
 939   if (font_desc == NULL)
 940     font_desc = pango_font_description_from_string (GTK_FONT_CHOOSER_DEFAULT_FONT_NAME);
 941
 942   pango_font_description_merge (priv->font_desc, font_desc, TRUE);
 943
 944   mask = pango_font_description_get_set_fields (font_desc);
 945
 946   if (mask & PANGO_FONT_MASK_SIZE)
 947     {
 948       double font_size = (double) pango_font_description_get_size (priv->font_desc) / PANGO_SCALE;
 949       /* XXX: This clamps, which can cause it to reloop into here, do we need
 950        * to block its signal handler? */
 951       gtk_range_set_value (GTK_RANGE (priv->size_slider), font_size);
 952       gtk_spin_button_set_value (GTK_SPIN_BUTTON (priv->size_spin), font_size);
 953     }
 954   if (mask & (PANGO_FONT_MASK_FAMILY | PANGO_FONT_MASK_STYLE | PANGO_FONT_MASK_VARIANT |
 955               PANGO_FONT_MASK_WEIGHT | PANGO_FONT_MASK_STRETCH))
 956     gtk_font_chooser_widget_select_font (fontchooser);
 957
 958   gtk_widget_override_font (priv->preview, priv->font_desc);
 959
 960   pango_font_description_free (font_desc); /* adopted */
 961
 962   g_object_notify (G_OBJECT (fontchooser), "font");
 963   g_object_notify (G_OBJECT (fontchooser), "font-desc");
 964 }
 965
 966 static void
 967 gtk_font_chooser_widget_select_font (GtkFontChooserWidget *fontchooser)
 968 {
 969   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 970   GtkTreeIter iter;
 971
 972   if (priv->family)
 973     g_object_unref (priv->family);
 974   if (priv->face)
 975     g_object_unref (priv->face);
 976
 977   if (gtk_font_chooser_widget_find_font (fontchooser,
 978                                          priv->font_desc,
 979                                          &iter,
 980                                          &priv->family,
 981                                          &priv->face))
 982     {
 983       GtkTreeIter filter_iter;
 984
 985       if (gtk_tree_model_filter_convert_child_iter_to_iter (GTK_TREE_MODEL_FILTER (priv->filter_model),
 986                                                             &filter_iter,
 987                                                             &iter))
 988         {
 989           GtkTreePath *path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->filter_model), &filter_iter);
 990           gtk_tree_view_set_cursor (GTK_TREE_VIEW (priv->family_face_list),
 991                                     path,
 992                                     NULL,
 993                                     FALSE);
 994           gtk_tree_path_free (path);
 995         }
 996     }
 997   else
 998     {
 999       gtk_tree_selection_unselect_all
1000         (gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->family_face_list)));
1001       priv->face = NULL;
1002       priv->family = NULL;
1003     }
1004 }
1005
1006 static const gchar*
1007 gtk_font_chooser_widget_get_preview_text (GtkFontChooserWidget *fontchooser)
1008 {
1009   return fontchooser->priv->preview_text;
1010 }
1011
1012 static void
1013 gtk_font_chooser_widget_set_preview_text (GtkFontChooserWidget *fontchooser,
1014                                           const gchar          *text)
1015 {
1016   g_free (fontchooser->priv->preview_text);
1017   fontchooser->priv->preview_text = g_strdup (text);
1018
1019   populate_list (fontchooser,
1020                  GTK_TREE_VIEW (fontchooser->priv->family_face_list),
1021                  fontchooser->priv->model);
1022
1023   gtk_entry_set_text (GTK_ENTRY (fontchooser->priv->preview), text);
1024
1025   g_object_notify (G_OBJECT (fontchooser), "preview-text");
1026 }
1027
1028 static gboolean
1029 gtk_font_chooser_widget_get_show_preview_entry (GtkFontChooserWidget *fontchooser)
1030 {
1031   return fontchooser->priv->show_preview_entry;
1032 }
1033
1034 static void
1035 gtk_font_chooser_widget_set_show_preview_entry (GtkFontChooserWidget *fontchooser,
1036                                                 gboolean              show_preview_entry)
1037 {
1038   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1039
1040   if (priv->show_preview_entry != show_preview_entry)
1041     {
1042       fontchooser->priv->show_preview_entry = show_preview_entry;
1043
1044       if (show_preview_entry)
1045         gtk_widget_show (fontchooser->priv->preview);
1046       else
1047         gtk_widget_hide (fontchooser->priv->preview);
1048
1049       g_object_notify (G_OBJECT (fontchooser), "show-preview-entry");
1050     }
1051 }
1052
1053 static void
1054 gtk_font_chooser_widget_set_filter_func (GtkFontChooser  *chooser,
1055                                          GtkFontFilterFunc filter,
1056                                          gpointer          data,
1057                                          GDestroyNotify    destroy)
1058 {
1059   GtkFontChooserWidget        *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
1060   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1061
1062   if (priv->filter_data_destroy)
1063     priv->filter_data_destroy (priv->filter_data);
1064
1065   priv->filter_func = filter;
1066   priv->filter_data = data;
1067   priv->filter_data_destroy = destroy;
1068
1069   gtk_tree_model_filter_refilter (GTK_TREE_MODEL_FILTER (priv->filter_model));
1070 }
1071
1072 static void
1073 gtk_font_chooser_widget_iface_init (GtkFontChooserIface *iface)
1074 {
1075   iface->get_font_family = gtk_font_chooser_widget_get_family;
1076   iface->get_font_face = gtk_font_chooser_widget_get_face;
1077   iface->get_font_size = gtk_font_chooser_widget_get_size;
1078   iface->set_filter_func = gtk_font_chooser_widget_set_filter_func;
1079 }