Pileus Git - ~andy/gtk/blob - gtk/gtkfontchooser.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 "gtkfontchooser.h"
  29 #include "gtkcellrenderertext.h"
  30 #include "gtkentry.h"
  31 #include "gtkframe.h"
  32 #include "gtkhbbox.h"
  33 #include "gtkhbox.h"
  34 #include "gtklabel.h"
  35 #include "gtkliststore.h"
  36 #include "gtkstock.h"
  37 #include "gtktreeselection.h"
  38 #include "gtktreeview.h"
  39 #include "gtkbox.h"
  40 #include "gtkscrolledwindow.h"
  41 #include "gtkintl.h"
  42 #include "gtkaccessible.h"
  43 #include "gtkbuildable.h"
  44 #include "gtkprivate.h"
  45 #include "gtkalignment.h"
  46 #include "gtkscale.h"
  47 #include "gtkbox.h"
  48 #include "gtkspinbutton.h"
  49 #include "gtkwidget.h"
  50 #include "gtkgrid.h"
  51
  52 /**
  53  * SECTION:gtkfontchooser
  54  * @Short_description: A widget for selecting fonts
  55  * @Title: GtkFontChooser
  56  * @See_also: #GtkFontChooserDialog
  57  *
  58  * The #GtkFontChooser widget lists the available fonts, styles and sizes,
  59  * allowing the user to select a font.
  60  * It is used in the #GtkFontChooserDialog widget to provide a dialog box for
  61  * selecting fonts.
  62  *
  63  * To set the font which is initially selected, use
  64  * gtk_font_chooser_set_font_name().
  65  *
  66  * To get the selected font use gtk_font_chooser_get_font_name().
  67  *
  68  * To change the text which is shown in the preview area, use
  69  * gtk_font_chooser_set_preview_text().
  70  *
  71  * Since: 3.2
  72  */
  73
  74
  75 struct _GtkFontChooserPrivate
  76 {
  77   GtkWidget    *search_entry;
  78   GtkWidget    *family_face_list;
  79   GtkListStore *model;
  80   GtkTreeModel *filter;
  81
  82   GtkWidget       *preview;
  83   GtkWidget       *preview_scrolled_window;
  84   gchar           *preview_text;
  85   gboolean         show_preview_entry;
  86
  87   GtkWidget *size_spin;
  88   GtkWidget *size_slider;
  89
  90   gint             size;
  91   PangoFontFace   *face;
  92   PangoFontFamily *family;
  93 };
  94
  95 #define DEFAULT_FONT_NAME "Sans 10"
  96 #define MAX_FONT_SIZE 999
  97
  98 /* This is the initial fixed height and the top padding of the preview entry */
  99 #define PREVIEW_HEIGHT 72
 100 #define PREVIEW_TOP_PADDING 6
 101
 102 /* These are the sizes of the font, style & size lists. */
 103 #define FONT_LIST_HEIGHT  136
 104 #define FONT_LIST_WIDTH   190
 105 #define FONT_STYLE_LIST_WIDTH 170
 106 #define FONT_SIZE_LIST_WIDTH  60
 107
 108 #define ROW_FORMAT_STRING "<span weight=\"bold\" size=\"small\">%s</span>\n<span size=\"x-large\" font_desc=\"%s\">%s</span>"
 109
 110 /* These are what we use as the standard font sizes, for the size list.
 111  */
 112 static const gint font_sizes[] = {
 113   6, 8, 9, 10, 11, 12, 13, 14, 16, 20, 24, 36, 48, 72
 114 };
 115
 116 enum {
 117    PROP_0,
 118    PROP_FONT_NAME,
 119    PROP_PREVIEW_TEXT,
 120    PROP_SHOW_PREVIEW_ENTRY
 121 };
 122
 123
 124 enum {
 125   FAMILY_COLUMN,
 126   FACE_COLUMN,
 127   PREVIEW_TEXT_COLUMN,
 128   PREVIEW_TITLE_COLUMN
 129 };
 130
 131 static void  gtk_font_chooser_set_property       (GObject         *object,
 132                                                   guint            prop_id,
 133                                                   const GValue    *value,
 134                                                   GParamSpec      *pspec);
 135 static void  gtk_font_chooser_get_property       (GObject         *object,
 136                                                   guint            prop_id,
 137                                                   GValue          *value,
 138                                                   GParamSpec      *pspec);
 139 static void  gtk_font_chooser_finalize           (GObject         *object);
 140
 141 static void  gtk_font_chooser_screen_changed     (GtkWidget       *widget,
 142                                                   GdkScreen       *previous_screen);
 143 static void  gtk_font_chooser_style_updated      (GtkWidget      *widget);
 144
 145 static void  gtk_font_chooser_ref_family         (GtkFontChooser *fontchooser,
 146                                                   PangoFontFamily  *family);
 147 static void  gtk_font_chooser_ref_face           (GtkFontChooser *fontchooser,
 148                                                   PangoFontFace    *face);
 149
 150 static void gtk_font_chooser_bootstrap_fontlist (GtkFontChooser *fontchooser);
 151
 152 G_DEFINE_TYPE (GtkFontChooser, gtk_font_chooser, GTK_TYPE_BOX)
 153
 154 static void
 155 gtk_font_chooser_class_init (GtkFontChooserClass *klass)
 156 {
 157   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 158   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 159
 160   widget_class->screen_changed = gtk_font_chooser_screen_changed;
 161   widget_class->style_updated = gtk_font_chooser_style_updated;
 162
 163   gobject_class->finalize = gtk_font_chooser_finalize;
 164   gobject_class->set_property = gtk_font_chooser_set_property;
 165   gobject_class->get_property = gtk_font_chooser_get_property;
 166
 167   g_object_class_install_property (gobject_class,
 168                                    PROP_FONT_NAME,
 169                                    g_param_spec_string ("font-name",
 170                                                         P_("Font name"),
 171                                                         P_("The string that represents this font"),
 172                                                         DEFAULT_FONT_NAME,
 173                                                         GTK_PARAM_READWRITE));
 174   g_object_class_install_property (gobject_class,
 175                                    PROP_PREVIEW_TEXT,
 176                                    g_param_spec_string ("preview-text",
 177                                                         P_("Preview text"),
 178                                                         P_("The text to display in order to demonstrate the selected font"),
 179                                                         pango_language_get_sample_string (NULL),
 180                                                         GTK_PARAM_READWRITE));
 181
 182   g_object_class_install_property (gobject_class,
 183                                    PROP_SHOW_PREVIEW_ENTRY,
 184                                    g_param_spec_boolean ("show-preview-entry",
 185                                                         P_("Show preview text entry"),
 186                                                         P_("Whether the preview text entry is shown or not"),
 187                                                         TRUE,
 188                                                         GTK_PARAM_READWRITE));
 189
 190   g_type_class_add_private (klass, sizeof (GtkFontChooserPrivate));
 191 }
 192
 193 static void
 194 gtk_font_chooser_set_property (GObject         *object,
 195                                guint            prop_id,
 196                                const GValue    *value,
 197                                GParamSpec      *pspec)
 198 {
 199   GtkFontChooser *fontchooser;
 200
 201   fontchooser = GTK_FONT_CHOOSER (object);
 202
 203   switch (prop_id)
 204     {
 205     case PROP_FONT_NAME:
 206       gtk_font_chooser_set_font_name (fontchooser, g_value_get_string (value));
 207       break;
 208     case PROP_PREVIEW_TEXT:
 209       gtk_font_chooser_set_preview_text (fontchooser, g_value_get_string (value));
 210       break;
 211     case PROP_SHOW_PREVIEW_ENTRY:
 212       gtk_font_chooser_set_show_preview_entry (fontchooser, g_value_get_boolean (value));
 213       break;
 214     default:
 215       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 216       break;
 217     }
 218 }
 219
 220 static void
 221 gtk_font_chooser_get_property (GObject         *object,
 222                                guint            prop_id,
 223                                GValue          *value,
 224                                GParamSpec      *pspec)
 225 {
 226   GtkFontChooser *fontchooser;
 227
 228   fontchooser = GTK_FONT_CHOOSER (object);
 229
 230   switch (prop_id)
 231     {
 232     case PROP_FONT_NAME:
 233       g_value_take_string (value, gtk_font_chooser_get_font_name (fontchooser));
 234       break;
 235     case PROP_PREVIEW_TEXT:
 236       g_value_set_string (value, gtk_font_chooser_get_preview_text (fontchooser));
 237       break;
 238     case PROP_SHOW_PREVIEW_ENTRY:
 239       g_value_set_boolean (value, gtk_font_chooser_get_show_preview_entry (fontchooser));
 240       break;
 241     default:
 242       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 243       break;
 244     }
 245 }
 246 static void
 247 deleted_text_cb (GtkEntryBuffer *buffer,
 248                  guint           position,
 249                  guint           n_chars,
 250                  gpointer        user_data)
 251 {
 252   GtkFontChooser        *fc    = (GtkFontChooser*)user_data;
 253   GtkFontChooserPrivate *priv  = fc->priv;
 254   GtkWidget             *entry = priv->search_entry;
 255
 256   if (gtk_entry_buffer_get_length (buffer) == 0)
 257     {
 258       GIcon *icon = g_themed_icon_new_with_default_fallbacks ("edit-find-symbolic");
 259       gtk_entry_set_icon_from_gicon (GTK_ENTRY (entry),
 260                                      GTK_ENTRY_ICON_SECONDARY,
 261                                      icon);
 262       g_object_unref (icon);
 263     }
 264
 265   gtk_tree_model_filter_refilter (GTK_TREE_MODEL_FILTER (priv->filter));
 266 }
 267
 268 static void
 269 inserted_text_cb (GtkEntryBuffer *buffer,
 270                   guint           position,
 271                   gchar          *chars,
 272                   guint           n_chars,
 273                   gpointer        user_data)
 274 {
 275   GtkFontChooser        *fc    = (GtkFontChooser*)user_data;
 276   GtkFontChooserPrivate *priv  = fc->priv;
 277   GtkWidget             *entry = priv->search_entry;
 278
 279   if (g_strcmp0 (gtk_entry_get_icon_stock (GTK_ENTRY (entry), GTK_ENTRY_ICON_SECONDARY),
 280                  "edit-clear-symbolic") != 0 ||
 281       g_strcmp0 (gtk_entry_get_icon_stock (GTK_ENTRY (entry), GTK_ENTRY_ICON_SECONDARY),
 282                  GTK_STOCK_CLEAR)       != 0)
 283     {
 284       GIcon *icon = g_themed_icon_new_with_default_fallbacks ("edit-clear-symbolic");
 285       gtk_entry_set_icon_from_gicon (GTK_ENTRY (entry),
 286                                      GTK_ENTRY_ICON_SECONDARY,
 287                                      icon);
 288       g_object_unref (icon);
 289     }
 290
 291   gtk_tree_model_filter_refilter (GTK_TREE_MODEL_FILTER (priv->filter));
 292 }
 293
 294 static void
 295 icon_press_cb (GtkEntry             *entry,
 296                GtkEntryIconPosition  pos,
 297                GdkEvent             *event,
 298                gpointer              user_data)
 299 {
 300   gtk_entry_buffer_delete_text (gtk_entry_get_buffer (entry), 0, -1);
 301 }
 302
 303 static void
 304 slider_change_cb (GtkAdjustment *adjustment,
 305                   gpointer       user_data)
 306 {
 307   GtkFontChooser        *fc    = (GtkFontChooser*)user_data;
 308   GtkFontChooserPrivate *priv  = fc->priv;
 309   GtkAdjustment         *spin_adj     = gtk_spin_button_get_adjustment(GTK_SPIN_BUTTON (priv->size_spin));
 310   gdouble                slider_value = gtk_adjustment_get_value (adjustment);
 311   gdouble                spin_value   = gtk_adjustment_get_value (spin_adj);
 312
 313   if (slider_value != spin_value)
 314     gtk_adjustment_set_value (spin_adj,
 315                               gtk_adjustment_get_value (adjustment));
 316 }
 317
 318 static void
 319 spin_change_cb (GtkAdjustment *adjustment,
 320                 gpointer       user_data)
 321 {
 322   PangoFontDescription    *desc;
 323   GtkFontChooser          *fontchooser = (GtkFontChooser*)user_data;
 324   GtkFontChooserPrivate   *priv        = fontchooser->priv;
 325   GtkAdjustment           *slider_adj  = gtk_range_get_adjustment (GTK_RANGE (priv->size_slider));
 326
 327   gdouble size = gtk_adjustment_get_value (adjustment);
 328   priv->size = ((gint)size) * PANGO_SCALE;
 329
 330   desc = pango_context_get_font_description (gtk_widget_get_pango_context (priv->preview));
 331   pango_font_description_set_size (desc, priv->size);
 332   gtk_widget_override_font (priv->preview, desc);
 333
 334   g_object_notify (G_OBJECT (fontchooser), "font-name");
 335
 336   /* If the new value is lower than the lower bound of the slider, we set
 337    * the slider adjustment to the lower bound value if it is not already set
 338    */
 339   if (size < gtk_adjustment_get_lower (slider_adj) &&
 340       gtk_adjustment_get_value (slider_adj) != gtk_adjustment_get_lower (slider_adj))
 341     gtk_adjustment_set_value (slider_adj, gtk_adjustment_get_lower (slider_adj));
 342
 343   /* If the new value is upper than the upper bound of the slider, we set
 344    * the slider adjustment to the upper bound value if it is not already set
 345    */
 346   else if (size > gtk_adjustment_get_upper (slider_adj) &&
 347            gtk_adjustment_get_value (slider_adj) != gtk_adjustment_get_upper (slider_adj))
 348     gtk_adjustment_set_value (slider_adj, gtk_adjustment_get_upper (slider_adj));
 349
 350   /* If the new value is not already set on the slider we set it */
 351   else if (size != gtk_adjustment_get_value (slider_adj))
 352     gtk_adjustment_set_value (slider_adj, size);
 353
 354   gtk_widget_queue_draw (priv->preview);
 355 }
 356
 357 static void
 358 set_range_marks (GtkFontChooserPrivate *priv,
 359                  GtkWidget             *size_slider,
 360                  gint                  *sizes,
 361                  gint                   length)
 362 {
 363   GtkAdjustment *adj;
 364   gint i;
 365   gdouble value;
 366
 367   if (length < 2)
 368     {
 369       sizes = (gint*)font_sizes;
 370       length = G_N_ELEMENTS (font_sizes);
 371     }
 372
 373   gtk_scale_clear_marks (GTK_SCALE (size_slider));
 374
 375   adj = gtk_range_get_adjustment(GTK_RANGE (size_slider));
 376
 377   gtk_adjustment_set_lower (adj, (gdouble) sizes[0]);
 378   gtk_adjustment_set_upper (adj, (gdouble) sizes[length-1]);
 379
 380   value = gtk_adjustment_get_value (adj);
 381   if (value > (gdouble) sizes[length-1])
 382     gtk_adjustment_set_value (adj, (gdouble) sizes[length-1]);
 383   else if (value < (gdouble) sizes[0])
 384     gtk_adjustment_set_value (adj, (gdouble) sizes[0]);
 385
 386   for (i = 0; i < length; i++)
 387     gtk_scale_add_mark (GTK_SCALE (size_slider),
 388                         (gdouble) sizes[i],
 389                         GTK_POS_BOTTOM, NULL);
 390 }
 391
 392 static void
 393 cursor_changed_cb (GtkTreeView *treeview,
 394                    gpointer     user_data)
 395 {
 396   PangoFontFamily      *family;
 397   PangoFontFace        *face;
 398   PangoFontDescription *desc;
 399
 400   gint *sizes;
 401   gint  i, n_sizes;
 402
 403   GtkTreeIter  iter;
 404   GtkTreePath *path = gtk_tree_path_new ();
 405
 406   GtkFontChooser *fontchooser = (GtkFontChooser*)user_data;
 407
 408   gtk_tree_view_get_cursor (treeview, &path, NULL);
 409
 410   if (!path)
 411     return;
 412
 413   if (!gtk_tree_model_get_iter (GTK_TREE_MODEL (fontchooser->priv->filter), &iter, path))
 414     {
 415       gtk_tree_path_free (path);
 416       return;
 417     }
 418
 419
 420   gtk_tree_model_get (GTK_TREE_MODEL (fontchooser->priv->filter), &iter,
 421                       FACE_COLUMN, &face,
 422                       FAMILY_COLUMN, &family,
 423                       -1);
 424
 425   gtk_tree_view_scroll_to_cell (treeview, path, NULL, FALSE, 0.5, 0.5);
 426
 427   gtk_tree_path_free (path);
 428   path = NULL;
 429
 430   if (!face || !family)
 431     {
 432       g_object_unref (face);
 433       g_object_unref (family);
 434       return;
 435     }
 436
 437   desc = pango_font_face_describe (face);
 438   pango_font_description_set_size (desc, fontchooser->priv->size);
 439   gtk_widget_override_font (fontchooser->priv->preview, desc);
 440
 441   pango_font_face_list_sizes (face, &sizes, &n_sizes);
 442   /* It seems not many fonts actually have a sane set of sizes */
 443   for (i = 0; i < n_sizes; i++)
 444     sizes[i] = sizes[i] / PANGO_SCALE;
 445
 446   set_range_marks (fontchooser->priv, fontchooser->priv->size_slider, sizes, n_sizes);
 447
 448   gtk_font_chooser_ref_family (fontchooser, family);
 449   gtk_font_chooser_ref_face   (fontchooser, face);
 450
 451   /* Free resources */
 452   g_object_unref ((gpointer)family);
 453   g_object_unref ((gpointer)face);
 454   pango_font_description_free(desc);
 455
 456   g_object_notify (G_OBJECT (fontchooser), "font-name");
 457 }
 458
 459 static gboolean
 460 zoom_preview_cb (GtkWidget      *scrolled_window,
 461                  GdkEventScroll *event,
 462                  gpointer        user_data)
 463 {
 464   GtkFontChooser        *fc    = (GtkFontChooser*)user_data;
 465   GtkFontChooserPrivate *priv  = fc->priv;
 466
 467   GtkAdjustment *adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin));
 468
 469   if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_RIGHT)
 470     gtk_adjustment_set_value (adj,
 471                               gtk_adjustment_get_value (adj) +
 472                               gtk_adjustment_get_step_increment (adj));
 473   else if (event->direction == GDK_SCROLL_DOWN || event->direction == GDK_SCROLL_LEFT)
 474     gtk_adjustment_set_value (adj,
 475                               gtk_adjustment_get_value (adj) -
 476                               gtk_adjustment_get_step_increment (adj));
 477   return TRUE;
 478 }
 479
 480 static void
 481 gtk_font_chooser_init (GtkFontChooser *fontchooser)
 482 {
 483   GIcon                   *icon;
 484   GtkFontChooserPrivate   *priv;
 485   PangoFontDescription    *font_desc;
 486   GtkWidget               *scrolled_win;
 487   GtkWidget               *grid;
 488   GtkWidget               *sub_grid;
 489
 490   fontchooser->priv = G_TYPE_INSTANCE_GET_PRIVATE (fontchooser,
 491                                                    GTK_TYPE_FONT_CHOOSER,
 492                                                    GtkFontChooserPrivate);
 493
 494   priv = fontchooser->priv;
 495
 496   /* Default preview string  */
 497   priv->preview_text = g_strdup (pango_language_get_sample_string (NULL));
 498   priv->show_preview_entry = TRUE;
 499
 500   /* Getting the default size */
 501   font_desc  = pango_context_get_font_description (gtk_widget_get_pango_context (GTK_WIDGET (fontchooser)));
 502   priv->size = pango_font_description_get_size (font_desc);
 503   priv->face = NULL;
 504   priv->family = NULL;
 505
 506   gtk_widget_push_composite_child ();
 507
 508   /* Creating fundamental widgets for the private struct */
 509   priv->search_entry = gtk_entry_new ();
 510   priv->family_face_list = gtk_tree_view_new ();
 511   priv->preview = gtk_entry_new ();
 512   priv->size_slider = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL,
 513                                                 (gdouble) font_sizes[0],
 514                                                 (gdouble) font_sizes[G_N_ELEMENTS (font_sizes) - 1],
 515                                                 1.0);
 516
 517   priv->size_spin = gtk_spin_button_new_with_range (0.0, (gdouble)(G_MAXINT / PANGO_SCALE), 1.0);
 518
 519   /** Bootstrapping widget layout **/
 520   gtk_box_set_spacing (GTK_BOX (fontchooser), 6);
 521
 522   /* Main font family/face view */
 523   scrolled_win = gtk_scrolled_window_new (NULL, NULL);
 524   gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_win),
 525                                   GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 526   gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolled_win),
 527                                        GTK_SHADOW_ETCHED_IN);
 528   gtk_container_add (GTK_CONTAINER (scrolled_win), priv->family_face_list);
 529
 530   /* Basic layout */
 531   grid = gtk_grid_new ();
 532   sub_grid = gtk_grid_new ();
 533
 534   gtk_widget_set_margin_bottom (priv->search_entry, 6);
 535   gtk_widget_set_margin_bottom (scrolled_win,       6);
 536   gtk_widget_set_margin_bottom (priv->preview,      6);
 537   gtk_widget_set_margin_right  (priv->size_slider,  6);
 538
 539   gtk_grid_attach (GTK_GRID (grid), priv->search_entry, 0, 0, 3, 1);
 540   gtk_grid_attach (GTK_GRID (grid), scrolled_win,       0, 1, 3, 1);
 541   gtk_grid_attach (GTK_GRID (grid), priv->preview,      0, 2, 3, 1);
 542   gtk_grid_attach (GTK_GRID (grid), sub_grid,           0, 3, 3, 1);
 543
 544   gtk_widget_set_hexpand  (GTK_WIDGET (sub_grid),          TRUE);
 545   gtk_grid_attach (GTK_GRID (sub_grid), priv->size_slider,  0, 3, 2, 1);
 546   gtk_grid_attach (GTK_GRID (sub_grid), priv->size_spin,    2, 3, 1, 1);
 547
 548   gtk_widget_set_hexpand  (GTK_WIDGET (scrolled_win),      TRUE);
 549   gtk_widget_set_vexpand  (GTK_WIDGET (scrolled_win),      TRUE);
 550   gtk_widget_set_hexpand  (GTK_WIDGET (priv->search_entry), TRUE);
 551
 552   gtk_widget_set_hexpand  (GTK_WIDGET (priv->size_slider), TRUE);
 553   gtk_widget_set_hexpand  (GTK_WIDGET (priv->size_spin),   FALSE);
 554
 555   gtk_grid_set_column_homogeneous (GTK_GRID (sub_grid), FALSE);
 556   gtk_box_pack_start (GTK_BOX (fontchooser), grid, TRUE, TRUE, 0);
 557
 558   /* Setting the adjustment values for the size slider */
 559   gtk_adjustment_set_value (gtk_range_get_adjustment (GTK_RANGE (priv->size_slider)),
 560                             (gdouble)(priv->size / PANGO_SCALE));
 561   gtk_adjustment_set_value (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin)),
 562                             (gdouble)(priv->size / PANGO_SCALE));
 563
 564   gtk_widget_show_all (GTK_WIDGET (fontchooser));
 565   gtk_widget_hide     (GTK_WIDGET (fontchooser));
 566
 567   /* Treeview column and model bootstrapping */
 568   gtk_font_chooser_bootstrap_fontlist (fontchooser);
 569
 570   /* Set default preview text */
 571   gtk_entry_set_text (GTK_ENTRY (priv->preview),
 572                       pango_language_get_sample_string (NULL));
 573
 574   /* Set search icon and place holder text */
 575   icon = g_themed_icon_new_with_default_fallbacks ("edit-find-symbolic");
 576   gtk_entry_set_icon_from_gicon (GTK_ENTRY (priv->search_entry),
 577                                  GTK_ENTRY_ICON_SECONDARY,
 578                                  icon);
 579   g_object_unref (icon);
 580
 581   gtk_entry_set_placeholder_text (GTK_ENTRY (priv->search_entry), _("Search font name"));
 582
 583   /** Callback connections **/
 584   /* Connect to callback for the live search text entry */
 585   g_signal_connect (G_OBJECT (gtk_entry_get_buffer (GTK_ENTRY (priv->search_entry))),
 586                     "deleted-text", G_CALLBACK (deleted_text_cb), fontchooser);
 587   g_signal_connect (G_OBJECT (gtk_entry_get_buffer (GTK_ENTRY (priv->search_entry))),
 588                     "inserted-text", G_CALLBACK (inserted_text_cb), fontchooser);
 589   g_signal_connect (G_OBJECT (priv->search_entry),
 590                     "icon-press", G_CALLBACK (icon_press_cb), NULL);
 591
 592   /* Size controls callbacks */
 593   g_signal_connect (G_OBJECT (gtk_range_get_adjustment (GTK_RANGE (priv->size_slider))),
 594                     "value-changed", G_CALLBACK (slider_change_cb), fontchooser);
 595   g_signal_connect (G_OBJECT (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin))),
 596                     "value-changed", G_CALLBACK (spin_change_cb), fontchooser);
 597
 598   /* Font selection callback */
 599   g_signal_connect (G_OBJECT (priv->family_face_list), "cursor-changed",
 600                     G_CALLBACK (cursor_changed_cb),    fontchooser);
 601
 602   /* Zoom on preview scroll*/
 603   g_signal_connect (G_OBJECT (priv->preview), "scroll-event",
 604                     G_CALLBACK (zoom_preview_cb),  fontchooser);
 605
 606   g_signal_connect (G_OBJECT (priv->size_slider), "scroll-event",
 607                     G_CALLBACK (zoom_preview_cb), fontchooser);
 608
 609   set_range_marks (priv, priv->size_slider, (gint*)font_sizes, G_N_ELEMENTS (font_sizes));
 610
 611   /* Set default focus */
 612   gtk_widget_pop_composite_child();
 613 }
 614
 615 /**
 616  * gtk_font_chooser_new:
 617  *
 618  * Creates a new #GtkFontChooser.
 619  *
 620  * Return value: a new #GtkFontChooser
 621  *
 622  * Since: 3.2
 623  */
 624 GtkWidget *
 625 gtk_font_chooser_new (void)
 626 {
 627   GtkFontChooser *fontchooser;
 628
 629   fontchooser = g_object_new (GTK_TYPE_FONT_CHOOSER, NULL);
 630
 631   return GTK_WIDGET (fontchooser);
 632 }
 633
 634 static int
 635 cmp_families (const void *a,
 636               const void *b)
 637 {
 638   const char *a_name = pango_font_family_get_name (*(PangoFontFamily **)a);
 639   const char *b_name = pango_font_family_get_name (*(PangoFontFamily **)b);
 640
 641   return g_utf8_collate (a_name, b_name);
 642 }
 643
 644 static void
 645 populate_list (GtkFontChooser *fontchooser,
 646                GtkTreeView    *treeview,
 647                GtkListStore   *model)
 648 {
 649   GtkStyleContext      *style_context;
 650   PangoFontDescription *default_font;
 651
 652   GtkTreeIter   match_row;
 653   GtkTreePath  *path;
 654
 655   gint n_families, i;
 656   PangoFontFamily **families;
 657
 658   GString     *tmp = g_string_new (NULL);
 659   GString     *family_and_face = g_string_new (NULL);
 660
 661   pango_context_list_families (gtk_widget_get_pango_context (GTK_WIDGET (treeview)),
 662                                &families,
 663                                &n_families);
 664
 665   qsort (families, n_families, sizeof (PangoFontFamily *), cmp_families);
 666
 667   gtk_list_store_clear (model);
 668
 669   /* Get row header font color */
 670   style_context = gtk_widget_get_style_context (GTK_WIDGET (treeview));
 671
 672   /* Get theme font */
 673   default_font  = (PangoFontDescription*) gtk_style_context_get_font (style_context,
 674                                                                       GTK_STATE_NORMAL);
 675
 676   /* Iterate over families and faces */
 677   for (i = 0; i < n_families; i++)
 678     {
 679       GtkTreeIter     iter;
 680       PangoFontFace **faces;
 681
 682       int             j, n_faces;
 683       const gchar    *fam_name = pango_font_family_get_name (families[i]);
 684
 685       pango_font_family_list_faces (families[i], &faces, &n_faces);
 686
 687       for (j = 0; j < n_faces; j++)
 688         {
 689           PangoFontDescription *pango_desc = pango_font_face_describe (faces[j]);
 690           const gchar *face_name = pango_font_face_get_face_name (faces[j]);
 691           gchar       *font_desc = pango_font_description_to_string (pango_desc);
 692
 693           /* foreground_color, family_name, face_name, desc, sample string */
 694           g_string_printf (family_and_face, "%s %s",
 695                                             fam_name,
 696                                             face_name);
 697
 698           g_string_printf (tmp, ROW_FORMAT_STRING,
 699                            family_and_face->str,
 700                            font_desc,
 701                            fontchooser->priv->preview_text);
 702
 703           gtk_list_store_append (model, &iter);
 704           gtk_list_store_set (model, &iter,
 705                               FAMILY_COLUMN, families[i],
 706                               FACE_COLUMN, faces[j],
 707                               PREVIEW_TITLE_COLUMN, family_and_face->str,
 708                               PREVIEW_TEXT_COLUMN, tmp->str,
 709                               -1);
 710
 711           /* Select the first font or the default font/face from the style context */
 712           if ((i == 0 && j == 0) ||
 713               (!strcmp (fam_name, pango_font_description_get_family (default_font)) && j == 0))
 714             match_row = iter;
 715
 716           pango_font_description_free(pango_desc);
 717           g_free (font_desc);
 718         }
 719
 720       g_free (faces);
 721     }
 722
 723   path = gtk_tree_model_get_path (GTK_TREE_MODEL (model), &match_row);
 724
 725   if (path)
 726     {
 727       gtk_tree_view_set_cursor (treeview, path, NULL, FALSE);
 728       gtk_tree_view_scroll_to_cell (treeview, path, NULL, FALSE, 0.5, 0.5);
 729       gtk_tree_path_free(path);
 730     }
 731
 732   g_string_free (family_and_face, TRUE);
 733   g_string_free (tmp, TRUE);
 734   g_free (families);
 735 }
 736
 737 static gboolean
 738 visible_func (GtkTreeModel *model,
 739               GtkTreeIter  *iter,
 740               gpointer      user_data)
 741 {
 742   gboolean result = TRUE;
 743   GtkFontChooserPrivate *priv = (GtkFontChooserPrivate*)user_data;
 744
 745   const gchar *search_text = (const gchar*)gtk_entry_get_text (GTK_ENTRY (priv->search_entry));
 746   gchar       *font_name;
 747   gchar       *term;
 748   gchar      **split_terms;
 749   gint         n_terms = 0;
 750
 751   /* If there's no filter string we show the item */
 752   if (strlen (search_text) == 0)
 753     return TRUE;
 754
 755   gtk_tree_model_get (model, iter,
 756                       PREVIEW_TITLE_COLUMN, &font_name,
 757                       -1);
 758
 759   if (font_name == NULL)
 760        return FALSE;
 761
 762   split_terms = g_strsplit (search_text, " ", 0);
 763   term = split_terms[0];
 764
 765   while (term && result)
 766   {
 767     gchar* font_name_casefold = g_utf8_casefold (font_name, -1);
 768     gchar* term_casefold = g_utf8_casefold (term, -1);
 769
 770     if (g_strrstr (font_name_casefold, term_casefold))
 771       result = result && TRUE;
 772     else
 773       result = FALSE;
 774
 775     n_terms++;
 776     term = split_terms[n_terms];
 777
 778     g_free (term_casefold);
 779     g_free (font_name_casefold);
 780   }
 781
 782   g_free (font_name);
 783   g_strfreev (split_terms);
 784
 785   return result;
 786 }
 787
 788 static void
 789 gtk_font_chooser_bootstrap_fontlist (GtkFontChooser* fontchooser)
 790 {
 791   GtkTreeView       *treeview = GTK_TREE_VIEW (fontchooser->priv->family_face_list);
 792   GtkCellRenderer   *cell;
 793   GtkTreeViewColumn *col;
 794
 795   fontchooser->priv->model = gtk_list_store_new (4,
 796                                                  PANGO_TYPE_FONT_FAMILY,
 797                                                  PANGO_TYPE_FONT_FACE,
 798                                                  G_TYPE_STRING,
 799                                                  G_TYPE_STRING);
 800
 801   fontchooser->priv->filter = gtk_tree_model_filter_new (GTK_TREE_MODEL (fontchooser->priv->model),
 802                                                          NULL);
 803   g_object_unref (fontchooser->priv->model);
 804
 805   gtk_tree_model_filter_set_visible_func (GTK_TREE_MODEL_FILTER (fontchooser->priv->filter),
 806                                           visible_func,
 807                                           (gpointer)fontchooser->priv,
 808                                           NULL);
 809
 810   gtk_tree_view_set_model (treeview, GTK_TREE_MODEL (fontchooser->priv->filter));
 811   g_object_unref (fontchooser->priv->filter);
 812
 813   gtk_tree_view_set_rules_hint      (treeview, TRUE);
 814   gtk_tree_view_set_headers_visible (treeview, FALSE);
 815
 816   cell = gtk_cell_renderer_text_new ();
 817   col = gtk_tree_view_column_new_with_attributes ("Family",
 818                                                   cell,
 819                                                   "markup", PREVIEW_TEXT_COLUMN,
 820                                                   NULL);
 821
 822   g_object_set (cell, "ellipsize", PANGO_ELLIPSIZE_END, NULL);
 823
 824   gtk_tree_view_append_column (treeview, col);
 825
 826   populate_list (fontchooser, treeview, fontchooser->priv->model);
 827 }
 828
 829
 830 static void
 831 gtk_font_chooser_finalize (GObject *object)
 832 {
 833   GtkFontChooser *fontchooser = GTK_FONT_CHOOSER (object);
 834
 835   gtk_font_chooser_ref_family (fontchooser, NULL);
 836   gtk_font_chooser_ref_face (fontchooser, NULL);
 837
 838   G_OBJECT_CLASS (gtk_font_chooser_parent_class)->finalize (object);
 839 }
 840
 841
 842 static void
 843 gtk_font_chooser_screen_changed (GtkWidget *widget,
 844                                  GdkScreen *previous_screen)
 845 {
 846   GtkFontChooser *fontchooser = GTK_FONT_CHOOSER (widget);
 847
 848   populate_list (fontchooser,
 849                  GTK_TREE_VIEW (fontchooser->priv->family_face_list),
 850                  fontchooser->priv->model);
 851   return;
 852 }
 853
 854 static void
 855 gtk_font_chooser_style_updated (GtkWidget *widget)
 856 {
 857   GtkFontChooser *fontchooser = GTK_FONT_CHOOSER (widget);
 858
 859   GTK_WIDGET_CLASS (gtk_font_chooser_parent_class)->style_updated (widget);
 860
 861   populate_list (fontchooser,
 862                  GTK_TREE_VIEW (fontchooser->priv->family_face_list),
 863                  fontchooser->priv->model);
 864   return;
 865 }
 866
 867 static void
 868 gtk_font_chooser_ref_family (GtkFontChooser   *fontchooser,
 869                              PangoFontFamily  *family)
 870 {
 871   GtkFontChooserPrivate *priv = fontchooser->priv;
 872
 873   if (family)
 874     family = g_object_ref (family);
 875   if (priv->family)
 876     g_object_unref (priv->family);
 877   priv->family = family;
 878 }
 879
 880 static void
 881 gtk_font_chooser_ref_face (GtkFontChooser   *fontchooser,
 882                            PangoFontFace    *face)
 883 {
 884   GtkFontChooserPrivate *priv = fontchooser->priv;
 885
 886   if (face)
 887     face = g_object_ref (face);
 888   if (priv->face)
 889     g_object_unref (priv->face);
 890   priv->face = face;
 891 }
 892
 893
 894 /*
 895  * These functions are the main public interface for getting/setting the font.
 896  */
 897
 898 /**
 899  * gtk_font_chooser_get_family:
 900  * @fontchooser: a #GtkFontChooser
 901  *
 902  * Gets the #PangoFontFamily representing the selected font family.
 903  *
 904  * Return value: (transfer none): A #PangoFontFamily representing the
 905  *     selected font family. Font families are a collection of font
 906  *     faces. The returned object is owned by @fontchooser and must not
 907  *     be modified or freed.
 908  *
 909  * Since: 3.2
 910  */
 911 PangoFontFamily *
 912 gtk_font_chooser_get_family (GtkFontChooser *fontchooser)
 913 {
 914   g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL);
 915
 916   return fontchooser->priv->family;
 917 }
 918
 919 /**
 920  * gtk_font_chooser_get_face:
 921  * @fontchooser: a #GtkFontChooser
 922  *
 923  * Gets the #PangoFontFace representing the selected font group
 924  * details (i.e. family, slant, weight, width, etc).
 925  *
 926  * Return value: (transfer none): A #PangoFontFace representing the
 927  *     selected font group details. The returned object is owned by
 928  *     @fontchooser and must not be modified or freed.
 929  *
 930  * Since: 3.2
 931  */
 932 PangoFontFace *
 933 gtk_font_chooser_get_face (GtkFontChooser *fontchooser)
 934 {
 935   g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL);
 936
 937   return fontchooser->priv->face;
 938 }
 939
 940 /**
 941  * gtk_font_chooser_get_size:
 942  * @fontchooser: a #GtkFontChooser
 943  *
 944  * The selected font size.
 945  *
 946  * Return value: A n integer representing the selected font size,
 947  *     or -1 if no font size is selected.
 948  *
 949  * Since: 3.2
 950  **/
 951 gint
 952 gtk_font_chooser_get_size (GtkFontChooser *fontchooser)
 953 {
 954   g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), -1);
 955
 956   return fontchooser->priv->size;
 957 }
 958
 959 /**
 960  * gtk_font_chooser_get_font_name:
 961  * @fontchooser: a #GtkFontChooser
 962  *
 963  * Gets the currently-selected font name.
 964  *
 965  * Note that this can be a different string than what you set with
 966  * gtk_font_chooser_set_font_name(), as the font chooser widget may
 967  * normalize font names and thus return a string with a different structure.
 968  * For example, "Helvetica Italic Bold 12" could be normalized to
 969  * "Helvetica Bold Italic 12". Use pango_font_description_equal()
 970  * if you want to compare two font descriptions.
 971  *
 972  * Return value: (transfer full) (allow-none): A string with the name of the
 973  *     current font, or %NULL if  no font is selected. You must free this
 974  *     string with g_free().
 975  *
 976  * Since: 3.2
 977  */
 978 gchar *
 979 gtk_font_chooser_get_font_name (GtkFontChooser *fontchooser)
 980 {
 981   gchar                *font_name;
 982   PangoFontDescription *desc;
 983
 984   if (!fontchooser->priv->face)
 985     return NULL;
 986
 987   desc = pango_font_face_describe (fontchooser->priv->face);
 988   font_name = pango_font_description_to_string (desc);
 989   pango_font_description_free (desc);
 990   return font_name;
 991 }
 992
 993 /* This sets the current font, then selecting the appropriate list rows. */
 994
 995 /**
 996  * gtk_font_chooser_set_font_name:
 997  * @fontchooser: a #GtkFontChooser
 998  * @fontname: a font name like "Helvetica 12" or "Times Bold 18"
 999  *
1000  * Sets the currently-selected font.
1001  *
1002  * Note that the @fontchooser needs to know the screen in which it will appear
1003  * for this to work; this can be guaranteed by simply making sure that the
1004  * @fontchooser is inserted in a toplevel window before you call this function.
1005  *
1006  * Return value: %TRUE if the font could be set successfully; %FALSE if no
1007  *     such font exists or if the @fontchooser doesn't belong to a particular
1008  *     screen yet.
1009  *
1010  * Since: 3.2
1011  */
1012 gboolean
1013 gtk_font_chooser_set_font_name (GtkFontChooser *fontchooser,
1014                                 const gchar      *fontname)
1015 {
1016   GtkFontChooserPrivate *priv = fontchooser->priv;
1017   GtkTreeIter           iter;
1018   gboolean              valid;
1019   gchar                *family_name;
1020   PangoFontDescription *desc;
1021   gboolean              found = FALSE;
1022
1023   g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), FALSE);
1024   g_return_val_if_fail (fontname != NULL, FALSE);
1025
1026   if (!gtk_widget_has_screen (GTK_WIDGET (fontchooser)))
1027     return FALSE;
1028
1029   desc = pango_font_description_from_string (fontname);
1030   family_name = (gchar*)pango_font_description_get_family (desc);
1031
1032   if (!family_name)
1033   {
1034     pango_font_description_free (desc);
1035     return FALSE;
1036   }
1037
1038   /* We make sure the filter is clear */
1039   gtk_entry_set_text (GTK_ENTRY (priv->search_entry), "");
1040
1041   /* We find the matching family/face */
1042   for (valid = gtk_tree_model_get_iter_first (GTK_TREE_MODEL (priv->filter), &iter);
1043        valid;
1044        valid = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->filter), &iter))
1045     {
1046       PangoFontFace        *face;
1047       PangoFontDescription *tmp_desc;
1048
1049       gtk_tree_model_get (GTK_TREE_MODEL (priv->filter), &iter,
1050                           FACE_COLUMN,   &face,
1051                           -1);
1052
1053       tmp_desc = pango_font_face_describe (face);
1054       if (pango_font_description_get_size_is_absolute (desc))
1055         pango_font_description_set_absolute_size (tmp_desc,
1056                                                   pango_font_description_get_size (desc));
1057       else
1058         pango_font_description_set_size (tmp_desc,
1059                                          pango_font_description_get_size (desc));
1060
1061
1062       if (pango_font_description_equal (desc, tmp_desc))
1063         {
1064           GtkTreePath *path;
1065           gint size = pango_font_description_get_size (desc);
1066
1067           if (size)
1068             {
1069               if (pango_font_description_get_size_is_absolute (desc))
1070                 size = size * PANGO_SCALE;
1071               gtk_spin_button_set_value (GTK_SPIN_BUTTON (priv->size_spin),
1072                                          size / PANGO_SCALE);
1073             }
1074
1075           path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->filter),
1076                                           &iter);
1077
1078           if (path)
1079             {
1080               gtk_tree_view_set_cursor (GTK_TREE_VIEW (priv->family_face_list),
1081                                         path,
1082                                         NULL,
1083                                         FALSE);
1084               gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (priv->family_face_list),
1085                                             path,
1086                                             NULL,
1087                                             FALSE,
1088                                             0.5,
1089                                             0.5);
1090               gtk_tree_path_free (path);
1091             }
1092
1093           found = TRUE;
1094         }
1095
1096       g_object_unref (face);
1097       pango_font_description_free (tmp_desc);
1098
1099       if (found)
1100         break;
1101     }
1102
1103   pango_font_description_free (desc);
1104   g_object_notify (G_OBJECT (fontchooser), "font-name");
1105
1106   return found;
1107 }
1108
1109 /**
1110  * gtk_font_chooser_get_preview_text:
1111  * @fontchooser: a #GtkFontChooser
1112  *
1113  * Gets the text displayed in the preview area.
1114  *
1115  * Return value: (transfer none): the text displayed in the
1116  *     preview area. This string is owned by the widget and
1117  *     should not be modified or freed
1118  *
1119  * Since: 3.2
1120  */
1121 const gchar*
1122 gtk_font_chooser_get_preview_text (GtkFontChooser *fontchooser)
1123 {
1124   g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL);
1125   return (const gchar*)fontchooser->priv->preview_text;
1126 }
1127
1128
1129 /**
1130  * gtk_font_chooser_set_preview_text:
1131  * @fontchooser: a #GtkFontChooser
1132  * @text: (transfer none): the text to display in the preview area
1133  *
1134  * Sets the text displayed in the preview area.
1135  * The @text is used to show how the selected font looks.
1136  *
1137  * Since: 3.2
1138  */
1139 void
1140 gtk_font_chooser_set_preview_text  (GtkFontChooser *fontchooser,
1141                                     const gchar    *text)
1142 {
1143   g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser));
1144   g_return_if_fail (text != NULL);
1145
1146   g_free (fontchooser->priv->preview_text);
1147   fontchooser->priv->preview_text = g_strdup (text);
1148
1149   populate_list (fontchooser,
1150                  GTK_TREE_VIEW (fontchooser->priv->family_face_list),
1151                  fontchooser->priv->model);
1152
1153   gtk_entry_set_text (GTK_ENTRY (fontchooser->priv->preview), text);
1154
1155   g_object_notify (G_OBJECT (fontchooser), "preview-text");
1156 }
1157
1158 /**
1159  * gtk_font_chooser_get_show_preview_entry:
1160  * @fontchooser: a #GtkFontChooser
1161  *
1162  * Return value: %TRUE if the preview entry is shown or %FALSE if
1163  *               it is hidden.
1164  * Since: 3.2
1165  */
1166 gboolean
1167 gtk_font_chooser_get_show_preview_entry (GtkFontChooser *fontchooser)
1168 {
1169   g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), FALSE);
1170
1171   return fontchooser->priv->show_preview_entry;
1172 }
1173
1174 /**
1175  * gtk_font_chooser_set_show_preview_entry:
1176  * @fontchooser: a #GtkFontChooser
1177  * @show_preview_entry: whether to show the editable preview entry or not
1178  *
1179  * Shows or hides the editable preview entry.
1180  * Since: 3.2
1181  */
1182 void
1183 gtk_font_chooser_set_show_preview_entry (GtkFontChooser *fontchooser,
1184                                          gboolean        show_preview_entry)
1185 {
1186   g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser));
1187
1188   if (show_preview_entry)
1189     gtk_widget_show (fontchooser->priv->preview_scrolled_window);
1190   else
1191     gtk_widget_hide (fontchooser->priv->preview_scrolled_window);
1192
1193   fontchooser->priv->show_preview_entry = show_preview_entry;
1194   g_object_notify (G_OBJECT (fontchooser), "show-preview-entry");
1195 }