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   gboolean   stop_notify;
  90
  91   gint             size;
  92   PangoFontFace   *face;
  93   PangoFontFamily *family;
  94 };
  95
  96 #define DEFAULT_FONT_NAME "Sans 10"
  97 #define MAX_FONT_SIZE 999
  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 ROW_FORMAT_STRING "<span weight=\"bold\" size=\"small\">%s</span>\n<span size=\"x-large\" font_desc=\"%s\">%s</span>"
 110
 111 /* These are what we use as the standard font sizes, for the size list.
 112  */
 113 static const gint font_sizes[] = {
 114   6, 8, 9, 10, 11, 12, 13, 14, 16, 20, 24, 36, 48, 72
 115 };
 116
 117 enum {
 118    PROP_0,
 119    PROP_FONT_NAME,
 120    PROP_PREVIEW_TEXT,
 121    PROP_SHOW_PREVIEW_ENTRY
 122 };
 123
 124
 125 enum {
 126   FAMILY_COLUMN,
 127   FACE_COLUMN,
 128   PREVIEW_TEXT_COLUMN,
 129   PREVIEW_TITLE_COLUMN
 130 };
 131
 132 static void  gtk_font_chooser_set_property       (GObject         *object,
 133                                                   guint            prop_id,
 134                                                   const GValue    *value,
 135                                                   GParamSpec      *pspec);
 136 static void  gtk_font_chooser_get_property       (GObject         *object,
 137                                                   guint            prop_id,
 138                                                   GValue          *value,
 139                                                   GParamSpec      *pspec);
 140 static void  gtk_font_chooser_finalize           (GObject         *object);
 141
 142 static void  gtk_font_chooser_screen_changed     (GtkWidget       *widget,
 143                                                   GdkScreen       *previous_screen);
 144 static void  gtk_font_chooser_style_updated      (GtkWidget      *widget);
 145
 146 static void  gtk_font_chooser_ref_family         (GtkFontChooser *fontchooser,
 147                                                   PangoFontFamily  *family);
 148 static void  gtk_font_chooser_ref_face           (GtkFontChooser *fontchooser,
 149                                                   PangoFontFace    *face);
 150
 151 static void gtk_font_chooser_bootstrap_fontlist (GtkFontChooser *fontchooser);
 152
 153 G_DEFINE_TYPE (GtkFontChooser, gtk_font_chooser, GTK_TYPE_BOX)
 154
 155 static void
 156 gtk_font_chooser_class_init (GtkFontChooserClass *klass)
 157 {
 158   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 159   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 160
 161   widget_class->screen_changed = gtk_font_chooser_screen_changed;
 162   widget_class->style_updated = gtk_font_chooser_style_updated;
 163
 164   gobject_class->finalize = gtk_font_chooser_finalize;
 165   gobject_class->set_property = gtk_font_chooser_set_property;
 166   gobject_class->get_property = gtk_font_chooser_get_property;
 167
 168   g_object_class_install_property (gobject_class,
 169                                    PROP_FONT_NAME,
 170                                    g_param_spec_string ("font-name",
 171                                                         P_("Font name"),
 172                                                         P_("The string that represents this font"),
 173                                                         DEFAULT_FONT_NAME,
 174                                                         GTK_PARAM_READWRITE));
 175   g_object_class_install_property (gobject_class,
 176                                    PROP_PREVIEW_TEXT,
 177                                    g_param_spec_string ("preview-text",
 178                                                         P_("Preview text"),
 179                                                         P_("The text to display in order to demonstrate the selected font"),
 180                                                         pango_language_get_sample_string (NULL),
 181                                                         GTK_PARAM_READWRITE));
 182
 183   g_object_class_install_property (gobject_class,
 184                                    PROP_SHOW_PREVIEW_ENTRY,
 185                                    g_param_spec_boolean ("show-preview-entry",
 186                                                         P_("Show preview text entry"),
 187                                                         P_("Whether the preview text entry is shown or not"),
 188                                                         TRUE,
 189                                                         GTK_PARAM_READWRITE));
 190
 191   g_type_class_add_private (klass, sizeof (GtkFontChooserPrivate));
 192 }
 193
 194 static void
 195 gtk_font_chooser_set_property (GObject         *object,
 196                                guint            prop_id,
 197                                const GValue    *value,
 198                                GParamSpec      *pspec)
 199 {
 200   GtkFontChooser *fontchooser;
 201
 202   fontchooser = GTK_FONT_CHOOSER (object);
 203
 204   switch (prop_id)
 205     {
 206     case PROP_FONT_NAME:
 207       gtk_font_chooser_set_font_name (fontchooser, g_value_get_string (value));
 208       break;
 209     case PROP_PREVIEW_TEXT:
 210       gtk_font_chooser_set_preview_text (fontchooser, g_value_get_string (value));
 211       break;
 212     case PROP_SHOW_PREVIEW_ENTRY:
 213       gtk_font_chooser_set_show_preview_entry (fontchooser, g_value_get_boolean (value));
 214       break;
 215     default:
 216       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 217       break;
 218     }
 219 }
 220
 221 static void
 222 gtk_font_chooser_get_property (GObject         *object,
 223                                guint            prop_id,
 224                                GValue          *value,
 225                                GParamSpec      *pspec)
 226 {
 227   GtkFontChooser *fontchooser;
 228
 229   fontchooser = GTK_FONT_CHOOSER (object);
 230
 231   switch (prop_id)
 232     {
 233     case PROP_FONT_NAME:
 234       g_value_take_string (value, gtk_font_chooser_get_font_name (fontchooser));
 235       break;
 236     case PROP_PREVIEW_TEXT:
 237       g_value_set_string (value, gtk_font_chooser_get_preview_text (fontchooser));
 238       break;
 239     case PROP_SHOW_PREVIEW_ENTRY:
 240       g_value_set_boolean (value, gtk_font_chooser_get_show_preview_entry (fontchooser));
 241       break;
 242     default:
 243       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 244       break;
 245     }
 246 }
 247 static void
 248 deleted_text_cb (GtkEntryBuffer *buffer,
 249                  guint           position,
 250                  guint           n_chars,
 251                  gpointer        user_data)
 252 {
 253   GtkFontChooser        *fc    = (GtkFontChooser*)user_data;
 254   GtkFontChooserPrivate *priv  = fc->priv;
 255   GtkWidget             *entry = priv->search_entry;
 256
 257   if (gtk_entry_buffer_get_length (buffer) == 0)
 258     {
 259       GIcon *icon = g_themed_icon_new_with_default_fallbacks ("edit-find-symbolic");
 260       gtk_entry_set_icon_from_gicon (GTK_ENTRY (entry),
 261                                      GTK_ENTRY_ICON_SECONDARY,
 262                                      icon);
 263       g_object_unref (icon);
 264     }
 265
 266   gtk_tree_model_filter_refilter (GTK_TREE_MODEL_FILTER (priv->filter));
 267 }
 268
 269 static void
 270 inserted_text_cb (GtkEntryBuffer *buffer,
 271                   guint           position,
 272                   gchar          *chars,
 273                   guint           n_chars,
 274                   gpointer        user_data)
 275 {
 276   GtkFontChooser        *fc    = (GtkFontChooser*)user_data;
 277   GtkFontChooserPrivate *priv  = fc->priv;
 278   GtkWidget             *entry = priv->search_entry;
 279
 280   if (g_strcmp0 (gtk_entry_get_icon_stock (GTK_ENTRY (entry), GTK_ENTRY_ICON_SECONDARY),
 281                  "edit-clear-symbolic") != 0 ||
 282       g_strcmp0 (gtk_entry_get_icon_stock (GTK_ENTRY (entry), GTK_ENTRY_ICON_SECONDARY),
 283                  GTK_STOCK_CLEAR)       != 0)
 284     {
 285       GIcon *icon = g_themed_icon_new_with_default_fallbacks ("edit-clear-symbolic");
 286       gtk_entry_set_icon_from_gicon (GTK_ENTRY (entry),
 287                                      GTK_ENTRY_ICON_SECONDARY,
 288                                      icon);
 289       g_object_unref (icon);
 290     }
 291
 292   gtk_tree_model_filter_refilter (GTK_TREE_MODEL_FILTER (priv->filter));
 293 }
 294
 295 static void
 296 icon_press_cb (GtkEntry             *entry,
 297                GtkEntryIconPosition  pos,
 298                GdkEvent             *event,
 299                gpointer              user_data)
 300 {
 301   gtk_entry_buffer_delete_text (gtk_entry_get_buffer (entry), 0, -1);
 302 }
 303
 304 static void
 305 slider_change_cb (GtkAdjustment *adjustment,
 306                   gpointer       user_data)
 307 {
 308   GtkFontChooser        *fc    = (GtkFontChooser*)user_data;
 309   GtkFontChooserPrivate *priv  = fc->priv;
 310   GtkAdjustment         *spin_adj     = gtk_spin_button_get_adjustment(GTK_SPIN_BUTTON (priv->size_spin));
 311   gdouble                slider_value = gtk_adjustment_get_value (adjustment);
 312   gdouble                spin_value   = gtk_adjustment_get_value (spin_adj);
 313
 314   if (slider_value != spin_value)
 315     gtk_adjustment_set_value (spin_adj,
 316                               gtk_adjustment_get_value (adjustment));
 317 }
 318
 319 static void
 320 spin_change_cb (GtkAdjustment *adjustment,
 321                 gpointer       user_data)
 322 {
 323   PangoFontDescription    *desc;
 324   GtkFontChooser          *fontchooser = (GtkFontChooser*)user_data;
 325   GtkFontChooserPrivate   *priv        = fontchooser->priv;
 326   GtkAdjustment           *slider_adj  = gtk_range_get_adjustment (GTK_RANGE (priv->size_slider));
 327
 328   gdouble size = gtk_adjustment_get_value (adjustment);
 329   priv->size = ((gint)size) * PANGO_SCALE;
 330
 331   desc = pango_context_get_font_description (gtk_widget_get_pango_context (priv->preview));
 332   pango_font_description_set_size (desc, priv->size);
 333   gtk_widget_override_font (priv->preview, desc);
 334
 335   if (priv->stop_notify)
 336     priv->stop_notify = FALSE;
 337   else
 338     g_object_notify (G_OBJECT (fontchooser), "font-name");
 339
 340   /* If the new value is lower than the lower bound of the slider, we set
 341    * the slider adjustment to the lower bound value if it is not already set
 342    */
 343   if (size < gtk_adjustment_get_lower (slider_adj) &&
 344       gtk_adjustment_get_value (slider_adj) != gtk_adjustment_get_lower (slider_adj))
 345     {
 346       gtk_adjustment_set_value (slider_adj, gtk_adjustment_get_lower (slider_adj));
 347       priv->stop_notify = TRUE;
 348     }
 349
 350   /* If the new value is upper than the upper bound of the slider, we set
 351    * the slider adjustment to the upper bound value if it is not already set
 352    */
 353   else if (size > gtk_adjustment_get_upper (slider_adj) &&
 354            gtk_adjustment_get_value (slider_adj) != gtk_adjustment_get_upper (slider_adj))
 355     {
 356       gtk_adjustment_set_value (slider_adj, gtk_adjustment_get_upper (slider_adj));
 357       priv->stop_notify = TRUE;
 358     }
 359
 360   /* If the new value is not already set on the slider we set it */
 361   else if (size != gtk_adjustment_get_value (slider_adj))
 362     {
 363       gtk_adjustment_set_value (slider_adj, size);
 364       priv->stop_notify = TRUE;
 365     }
 366
 367   gtk_widget_queue_draw (priv->preview);
 368 }
 369
 370 static void
 371 set_range_marks (GtkFontChooserPrivate *priv,
 372                  GtkWidget             *size_slider,
 373                  gint                  *sizes,
 374                  gint                   length)
 375 {
 376   GtkAdjustment *adj;
 377   gint i;
 378   gdouble value;
 379
 380   if (length < 2)
 381     {
 382       sizes = (gint*)font_sizes;
 383       length = G_N_ELEMENTS (font_sizes);
 384     }
 385
 386   gtk_scale_clear_marks (GTK_SCALE (size_slider));
 387
 388   adj = gtk_range_get_adjustment(GTK_RANGE (size_slider));
 389
 390   gtk_adjustment_set_lower (adj, (gdouble) sizes[0]);
 391   gtk_adjustment_set_upper (adj, (gdouble) sizes[length-1]);
 392
 393   value = gtk_adjustment_get_value (adj);
 394   if (value > (gdouble) sizes[length-1])
 395     gtk_adjustment_set_value (adj, (gdouble) sizes[length-1]);
 396   else if (value < (gdouble) sizes[0])
 397     gtk_adjustment_set_value (adj, (gdouble) sizes[0]);
 398
 399   for (i = 0; i < length; i++)
 400     gtk_scale_add_mark (GTK_SCALE (size_slider),
 401                         (gdouble) sizes[i],
 402                         GTK_POS_BOTTOM, NULL);
 403 }
 404
 405 static void
 406 cursor_changed_cb (GtkTreeView *treeview,
 407                    gpointer     user_data)
 408 {
 409   PangoFontFamily      *family;
 410   PangoFontFace        *face;
 411   PangoFontDescription *desc;
 412
 413   gint *sizes;
 414   gint  i, n_sizes;
 415
 416   GtkTreeIter  iter;
 417   GtkTreePath *path = gtk_tree_path_new ();
 418
 419   GtkFontChooser *fontchooser = (GtkFontChooser*)user_data;
 420
 421   gtk_tree_view_get_cursor (treeview, &path, NULL);
 422
 423   if (!path)
 424     return;
 425
 426   if (!gtk_tree_model_get_iter (GTK_TREE_MODEL (fontchooser->priv->filter), &iter, path))
 427     {
 428       gtk_tree_path_free (path);
 429       return;
 430     }
 431
 432
 433   gtk_tree_model_get (GTK_TREE_MODEL (fontchooser->priv->filter), &iter,
 434                       FACE_COLUMN, &face,
 435                       FAMILY_COLUMN, &family,
 436                       -1);
 437
 438   gtk_tree_view_scroll_to_cell (treeview, path, NULL, FALSE, 0.5, 0.5);
 439
 440   gtk_tree_path_free (path);
 441   path = NULL;
 442
 443   if (!face || !family)
 444     {
 445       g_object_unref (face);
 446       g_object_unref (family);
 447       return;
 448     }
 449
 450   desc = pango_font_face_describe (face);
 451   pango_font_description_set_size (desc, fontchooser->priv->size);
 452   gtk_widget_override_font (fontchooser->priv->preview, desc);
 453
 454   pango_font_face_list_sizes (face, &sizes, &n_sizes);
 455   /* It seems not many fonts actually have a sane set of sizes */
 456   for (i = 0; i < n_sizes; i++)
 457     sizes[i] = sizes[i] / PANGO_SCALE;
 458
 459   set_range_marks (fontchooser->priv, fontchooser->priv->size_slider, sizes, n_sizes);
 460
 461   gtk_font_chooser_ref_family (fontchooser, family);
 462   gtk_font_chooser_ref_face   (fontchooser, face);
 463
 464   /* Free resources */
 465   g_object_unref ((gpointer)family);
 466   g_object_unref ((gpointer)face);
 467   pango_font_description_free(desc);
 468
 469   g_object_notify (G_OBJECT (fontchooser), "font-name");
 470 }
 471
 472 static gboolean
 473 zoom_preview_cb (GtkWidget      *scrolled_window,
 474                  GdkEventScroll *event,
 475                  gpointer        user_data)
 476 {
 477   GtkFontChooser        *fc    = (GtkFontChooser*)user_data;
 478   GtkFontChooserPrivate *priv  = fc->priv;
 479
 480   GtkAdjustment *adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin));
 481
 482   if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_RIGHT)
 483     gtk_adjustment_set_value (adj,
 484                               gtk_adjustment_get_value (adj) +
 485                               gtk_adjustment_get_step_increment (adj));
 486   else if (event->direction == GDK_SCROLL_DOWN || event->direction == GDK_SCROLL_LEFT)
 487     gtk_adjustment_set_value (adj,
 488                               gtk_adjustment_get_value (adj) -
 489                               gtk_adjustment_get_step_increment (adj));
 490   return TRUE;
 491 }
 492
 493 static void
 494 gtk_font_chooser_init (GtkFontChooser *fontchooser)
 495 {
 496   GIcon                   *icon;
 497   GtkFontChooserPrivate   *priv;
 498   PangoFontDescription    *font_desc;
 499   GtkWidget               *scrolled_win;
 500   GtkWidget               *grid;
 501   GtkWidget               *sub_grid;
 502
 503   fontchooser->priv = G_TYPE_INSTANCE_GET_PRIVATE (fontchooser,
 504                                                    GTK_TYPE_FONT_CHOOSER,
 505                                                    GtkFontChooserPrivate);
 506
 507   priv = fontchooser->priv;
 508
 509   /* Default preview string  */
 510   priv->preview_text = g_strdup (pango_language_get_sample_string (NULL));
 511   priv->show_preview_entry = TRUE;
 512
 513   /* Getting the default size */
 514   font_desc  = pango_context_get_font_description (gtk_widget_get_pango_context (GTK_WIDGET (fontchooser)));
 515   priv->size = pango_font_description_get_size (font_desc);
 516   priv->face = NULL;
 517   priv->family = NULL;
 518
 519   gtk_widget_push_composite_child ();
 520
 521   /* Creating fundamental widgets for the private struct */
 522   priv->search_entry = gtk_entry_new ();
 523   priv->family_face_list = gtk_tree_view_new ();
 524   priv->preview = gtk_entry_new ();
 525   priv->size_slider = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL,
 526                                                 (gdouble) font_sizes[0],
 527                                                 (gdouble) font_sizes[G_N_ELEMENTS (font_sizes) - 1],
 528                                                 1.0);
 529
 530   priv->size_spin = gtk_spin_button_new_with_range (0.0, (gdouble)(G_MAXINT / PANGO_SCALE), 1.0);
 531
 532   /** Bootstrapping widget layout **/
 533   gtk_box_set_spacing (GTK_BOX (fontchooser), 6);
 534
 535   /* Main font family/face view */
 536   scrolled_win = gtk_scrolled_window_new (NULL, NULL);
 537   gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_win),
 538                                   GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 539   gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolled_win),
 540                                        GTK_SHADOW_ETCHED_IN);
 541   gtk_container_add (GTK_CONTAINER (scrolled_win), priv->family_face_list);
 542
 543   /* Basic layout */
 544   grid = gtk_grid_new ();
 545   sub_grid = gtk_grid_new ();
 546
 547   gtk_widget_set_margin_bottom (priv->search_entry, 6);
 548   gtk_widget_set_margin_bottom (scrolled_win,       6);
 549   gtk_widget_set_margin_bottom (priv->preview,      6);
 550   gtk_widget_set_margin_right  (priv->size_slider,  6);
 551
 552   gtk_grid_attach (GTK_GRID (grid), priv->search_entry, 0, 0, 3, 1);
 553   gtk_grid_attach (GTK_GRID (grid), scrolled_win,       0, 1, 3, 1);
 554   gtk_grid_attach (GTK_GRID (grid), priv->preview,      0, 2, 3, 1);
 555   gtk_grid_attach (GTK_GRID (grid), sub_grid,           0, 3, 3, 1);
 556
 557   gtk_widget_set_hexpand  (GTK_WIDGET (sub_grid),          TRUE);
 558   gtk_grid_attach (GTK_GRID (sub_grid), priv->size_slider,  0, 3, 2, 1);
 559   gtk_grid_attach (GTK_GRID (sub_grid), priv->size_spin,    2, 3, 1, 1);
 560
 561   gtk_widget_set_hexpand  (GTK_WIDGET (scrolled_win),      TRUE);
 562   gtk_widget_set_vexpand  (GTK_WIDGET (scrolled_win),      TRUE);
 563   gtk_widget_set_hexpand  (GTK_WIDGET (priv->search_entry), TRUE);
 564
 565   gtk_widget_set_hexpand  (GTK_WIDGET (priv->size_slider), TRUE);
 566   gtk_widget_set_hexpand  (GTK_WIDGET (priv->size_spin),   FALSE);
 567
 568   gtk_grid_set_column_homogeneous (GTK_GRID (sub_grid), FALSE);
 569   gtk_box_pack_start (GTK_BOX (fontchooser), grid, TRUE, TRUE, 0);
 570
 571   /* Setting the adjustment values for the size slider */
 572   gtk_adjustment_set_value (gtk_range_get_adjustment (GTK_RANGE (priv->size_slider)),
 573                             (gdouble)(priv->size / PANGO_SCALE));
 574   gtk_adjustment_set_value (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin)),
 575                             (gdouble)(priv->size / PANGO_SCALE));
 576
 577   gtk_widget_show_all (GTK_WIDGET (fontchooser));
 578   gtk_widget_hide     (GTK_WIDGET (fontchooser));
 579
 580   /* Treeview column and model bootstrapping */
 581   gtk_font_chooser_bootstrap_fontlist (fontchooser);
 582
 583   /* Set default preview text */
 584   gtk_entry_set_text (GTK_ENTRY (priv->preview),
 585                       pango_language_get_sample_string (NULL));
 586
 587   /* Set search icon and place holder text */
 588   icon = g_themed_icon_new_with_default_fallbacks ("edit-find-symbolic");
 589   gtk_entry_set_icon_from_gicon (GTK_ENTRY (priv->search_entry),
 590                                  GTK_ENTRY_ICON_SECONDARY,
 591                                  icon);
 592   g_object_unref (icon);
 593
 594   gtk_entry_set_placeholder_text (GTK_ENTRY (priv->search_entry), _("Search font name"));
 595
 596   /** Callback connections **/
 597   /* Connect to callback for the live search text entry */
 598   g_signal_connect (G_OBJECT (gtk_entry_get_buffer (GTK_ENTRY (priv->search_entry))),
 599                     "deleted-text", G_CALLBACK (deleted_text_cb), fontchooser);
 600   g_signal_connect (G_OBJECT (gtk_entry_get_buffer (GTK_ENTRY (priv->search_entry))),
 601                     "inserted-text", G_CALLBACK (inserted_text_cb), fontchooser);
 602   g_signal_connect (G_OBJECT (priv->search_entry),
 603                     "icon-press", G_CALLBACK (icon_press_cb), NULL);
 604
 605   /* Size controls callbacks */
 606   g_signal_connect (G_OBJECT (gtk_range_get_adjustment (GTK_RANGE (priv->size_slider))),
 607                     "value-changed", G_CALLBACK (slider_change_cb), fontchooser);
 608   g_signal_connect (G_OBJECT (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin))),
 609                     "value-changed", G_CALLBACK (spin_change_cb), fontchooser);
 610   priv->stop_notify = FALSE;
 611
 612   /* Font selection callback */
 613   g_signal_connect (G_OBJECT (priv->family_face_list), "cursor-changed",
 614                     G_CALLBACK (cursor_changed_cb),    fontchooser);
 615
 616   /* Zoom on preview scroll*/
 617   g_signal_connect (G_OBJECT (priv->preview), "scroll-event",
 618                     G_CALLBACK (zoom_preview_cb),  fontchooser);
 619
 620   g_signal_connect (G_OBJECT (priv->size_slider), "scroll-event",
 621                     G_CALLBACK (zoom_preview_cb), fontchooser);
 622
 623   set_range_marks (priv, priv->size_slider, (gint*)font_sizes, G_N_ELEMENTS (font_sizes));
 624
 625   /* Set default focus */
 626   gtk_widget_pop_composite_child();
 627 }
 628
 629 /**
 630  * gtk_font_chooser_new:
 631  *
 632  * Creates a new #GtkFontChooser.
 633  *
 634  * Return value: a new #GtkFontChooser
 635  *
 636  * Since: 3.2
 637  */
 638 GtkWidget *
 639 gtk_font_chooser_new (void)
 640 {
 641   GtkFontChooser *fontchooser;
 642
 643   fontchooser = g_object_new (GTK_TYPE_FONT_CHOOSER, NULL);
 644
 645   return GTK_WIDGET (fontchooser);
 646 }
 647
 648 static int
 649 cmp_families (const void *a,
 650               const void *b)
 651 {
 652   const char *a_name = pango_font_family_get_name (*(PangoFontFamily **)a);
 653   const char *b_name = pango_font_family_get_name (*(PangoFontFamily **)b);
 654
 655   return g_utf8_collate (a_name, b_name);
 656 }
 657
 658 static void
 659 populate_list (GtkFontChooser *fontchooser,
 660                GtkTreeView    *treeview,
 661                GtkListStore   *model)
 662 {
 663   GtkStyleContext      *style_context;
 664   PangoFontDescription *default_font;
 665
 666   GtkTreeIter   match_row;
 667   GtkTreePath  *path;
 668
 669   gint n_families, i;
 670   PangoFontFamily **families;
 671
 672   GString     *tmp = g_string_new (NULL);
 673   GString     *family_and_face = g_string_new (NULL);
 674
 675   pango_context_list_families (gtk_widget_get_pango_context (GTK_WIDGET (treeview)),
 676                                &families,
 677                                &n_families);
 678
 679   qsort (families, n_families, sizeof (PangoFontFamily *), cmp_families);
 680
 681   gtk_list_store_clear (model);
 682
 683   /* Get row header font color */
 684   style_context = gtk_widget_get_style_context (GTK_WIDGET (treeview));
 685
 686   /* Get theme font */
 687   default_font  = (PangoFontDescription*) gtk_style_context_get_font (style_context,
 688                                                                       GTK_STATE_NORMAL);
 689
 690   /* Iterate over families and faces */
 691   for (i = 0; i < n_families; i++)
 692     {
 693       GtkTreeIter     iter;
 694       PangoFontFace **faces;
 695
 696       int             j, n_faces;
 697       const gchar    *fam_name = pango_font_family_get_name (families[i]);
 698
 699       pango_font_family_list_faces (families[i], &faces, &n_faces);
 700
 701       for (j = 0; j < n_faces; j++)
 702         {
 703           PangoFontDescription *pango_desc = pango_font_face_describe (faces[j]);
 704           const gchar *face_name = pango_font_face_get_face_name (faces[j]);
 705           gchar       *font_desc = pango_font_description_to_string (pango_desc);
 706
 707           /* foreground_color, family_name, face_name, desc, sample string */
 708           g_string_printf (family_and_face, "%s %s",
 709                                             fam_name,
 710                                             face_name);
 711
 712           g_string_printf (tmp, ROW_FORMAT_STRING,
 713                            family_and_face->str,
 714                            font_desc,
 715                            fontchooser->priv->preview_text);
 716
 717           gtk_list_store_append (model, &iter);
 718           gtk_list_store_set (model, &iter,
 719                               FAMILY_COLUMN, families[i],
 720                               FACE_COLUMN, faces[j],
 721                               PREVIEW_TITLE_COLUMN, family_and_face->str,
 722                               PREVIEW_TEXT_COLUMN, tmp->str,
 723                               -1);
 724
 725           /* Select the first font or the default font/face from the style context */
 726           if ((i == 0 && j == 0) ||
 727               (!strcmp (fam_name, pango_font_description_get_family (default_font)) && j == 0))
 728             match_row = iter;
 729
 730           pango_font_description_free(pango_desc);
 731           g_free (font_desc);
 732         }
 733
 734       g_free (faces);
 735     }
 736
 737   path = gtk_tree_model_get_path (GTK_TREE_MODEL (model), &match_row);
 738
 739   if (path)
 740     {
 741       gtk_tree_view_set_cursor (treeview, path, NULL, FALSE);
 742       gtk_tree_view_scroll_to_cell (treeview, path, NULL, FALSE, 0.5, 0.5);
 743       gtk_tree_path_free(path);
 744     }
 745
 746   g_string_free (family_and_face, TRUE);
 747   g_string_free (tmp, TRUE);
 748   g_free (families);
 749 }
 750
 751 static gboolean
 752 visible_func (GtkTreeModel *model,
 753               GtkTreeIter  *iter,
 754               gpointer      user_data)
 755 {
 756   gboolean result = TRUE;
 757   GtkFontChooserPrivate *priv = (GtkFontChooserPrivate*)user_data;
 758
 759   const gchar *search_text = (const gchar*)gtk_entry_get_text (GTK_ENTRY (priv->search_entry));
 760   gchar       *font_name;
 761   gchar       *term;
 762   gchar      **split_terms;
 763   gint         n_terms = 0;
 764
 765   /* If there's no filter string we show the item */
 766   if (strlen (search_text) == 0)
 767     return TRUE;
 768
 769   gtk_tree_model_get (model, iter,
 770                       PREVIEW_TITLE_COLUMN, &font_name,
 771                       -1);
 772
 773   if (font_name == NULL)
 774        return FALSE;
 775
 776   split_terms = g_strsplit (search_text, " ", 0);
 777   term = split_terms[0];
 778
 779   while (term && result)
 780   {
 781     gchar* font_name_casefold = g_utf8_casefold (font_name, -1);
 782     gchar* term_casefold = g_utf8_casefold (term, -1);
 783
 784     if (g_strrstr (font_name_casefold, term_casefold))
 785       result = result && TRUE;
 786     else
 787       result = FALSE;
 788
 789     n_terms++;
 790     term = split_terms[n_terms];
 791
 792     g_free (term_casefold);
 793     g_free (font_name_casefold);
 794   }
 795
 796   g_free (font_name);
 797   g_strfreev (split_terms);
 798
 799   return result;
 800 }
 801
 802 static void
 803 gtk_font_chooser_bootstrap_fontlist (GtkFontChooser* fontchooser)
 804 {
 805   GtkTreeView       *treeview = GTK_TREE_VIEW (fontchooser->priv->family_face_list);
 806   GtkCellRenderer   *cell;
 807   GtkTreeViewColumn *col;
 808
 809   fontchooser->priv->model = gtk_list_store_new (4,
 810                                                  PANGO_TYPE_FONT_FAMILY,
 811                                                  PANGO_TYPE_FONT_FACE,
 812                                                  G_TYPE_STRING,
 813                                                  G_TYPE_STRING);
 814
 815   fontchooser->priv->filter = gtk_tree_model_filter_new (GTK_TREE_MODEL (fontchooser->priv->model),
 816                                                          NULL);
 817   g_object_unref (fontchooser->priv->model);
 818
 819   gtk_tree_model_filter_set_visible_func (GTK_TREE_MODEL_FILTER (fontchooser->priv->filter),
 820                                           visible_func,
 821                                           (gpointer)fontchooser->priv,
 822                                           NULL);
 823
 824   gtk_tree_view_set_model (treeview, GTK_TREE_MODEL (fontchooser->priv->filter));
 825   g_object_unref (fontchooser->priv->filter);
 826
 827   gtk_tree_view_set_rules_hint      (treeview, TRUE);
 828   gtk_tree_view_set_headers_visible (treeview, FALSE);
 829
 830   cell = gtk_cell_renderer_text_new ();
 831   col = gtk_tree_view_column_new_with_attributes ("Family",
 832                                                   cell,
 833                                                   "markup", PREVIEW_TEXT_COLUMN,
 834                                                   NULL);
 835
 836   g_object_set (cell, "ellipsize", PANGO_ELLIPSIZE_END, NULL);
 837
 838   gtk_tree_view_append_column (treeview, col);
 839
 840   populate_list (fontchooser, treeview, fontchooser->priv->model);
 841 }
 842
 843
 844 static void
 845 gtk_font_chooser_finalize (GObject *object)
 846 {
 847   GtkFontChooser *fontchooser = GTK_FONT_CHOOSER (object);
 848
 849   gtk_font_chooser_ref_family (fontchooser, NULL);
 850   gtk_font_chooser_ref_face (fontchooser, NULL);
 851
 852   G_OBJECT_CLASS (gtk_font_chooser_parent_class)->finalize (object);
 853 }
 854
 855
 856 static void
 857 gtk_font_chooser_screen_changed (GtkWidget *widget,
 858                                  GdkScreen *previous_screen)
 859 {
 860   GtkFontChooser *fontchooser = GTK_FONT_CHOOSER (widget);
 861
 862   populate_list (fontchooser,
 863                  GTK_TREE_VIEW (fontchooser->priv->family_face_list),
 864                  fontchooser->priv->model);
 865   return;
 866 }
 867
 868 static void
 869 gtk_font_chooser_style_updated (GtkWidget *widget)
 870 {
 871   GtkFontChooser *fontchooser = GTK_FONT_CHOOSER (widget);
 872
 873   GTK_WIDGET_CLASS (gtk_font_chooser_parent_class)->style_updated (widget);
 874
 875   populate_list (fontchooser,
 876                  GTK_TREE_VIEW (fontchooser->priv->family_face_list),
 877                  fontchooser->priv->model);
 878   return;
 879 }
 880
 881 static void
 882 gtk_font_chooser_ref_family (GtkFontChooser   *fontchooser,
 883                              PangoFontFamily  *family)
 884 {
 885   GtkFontChooserPrivate *priv = fontchooser->priv;
 886
 887   if (family)
 888     family = g_object_ref (family);
 889   if (priv->family)
 890     g_object_unref (priv->family);
 891   priv->family = family;
 892 }
 893
 894 static void
 895 gtk_font_chooser_ref_face (GtkFontChooser   *fontchooser,
 896                            PangoFontFace    *face)
 897 {
 898   GtkFontChooserPrivate *priv = fontchooser->priv;
 899
 900   if (face)
 901     face = g_object_ref (face);
 902   if (priv->face)
 903     g_object_unref (priv->face);
 904   priv->face = face;
 905 }
 906
 907
 908 /*
 909  * These functions are the main public interface for getting/setting the font.
 910  */
 911
 912 /**
 913  * gtk_font_chooser_get_family:
 914  * @fontchooser: a #GtkFontChooser
 915  *
 916  * Gets the #PangoFontFamily representing the selected font family.
 917  *
 918  * Return value: (transfer none): A #PangoFontFamily representing the
 919  *     selected font family. Font families are a collection of font
 920  *     faces. The returned object is owned by @fontchooser and must not
 921  *     be modified or freed.
 922  *
 923  * Since: 3.2
 924  */
 925 PangoFontFamily *
 926 gtk_font_chooser_get_family (GtkFontChooser *fontchooser)
 927 {
 928   g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL);
 929
 930   return fontchooser->priv->family;
 931 }
 932
 933 /**
 934  * gtk_font_chooser_get_face:
 935  * @fontchooser: a #GtkFontChooser
 936  *
 937  * Gets the #PangoFontFace representing the selected font group
 938  * details (i.e. family, slant, weight, width, etc).
 939  *
 940  * Return value: (transfer none): A #PangoFontFace representing the
 941  *     selected font group details. The returned object is owned by
 942  *     @fontchooser and must not be modified or freed.
 943  *
 944  * Since: 3.2
 945  */
 946 PangoFontFace *
 947 gtk_font_chooser_get_face (GtkFontChooser *fontchooser)
 948 {
 949   g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL);
 950
 951   return fontchooser->priv->face;
 952 }
 953
 954 /**
 955  * gtk_font_chooser_get_size:
 956  * @fontchooser: a #GtkFontChooser
 957  *
 958  * The selected font size.
 959  *
 960  * Return value: A n integer representing the selected font size,
 961  *     or -1 if no font size is selected.
 962  *
 963  * Since: 3.2
 964  **/
 965 gint
 966 gtk_font_chooser_get_size (GtkFontChooser *fontchooser)
 967 {
 968   g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), -1);
 969
 970   return fontchooser->priv->size;
 971 }
 972
 973 /**
 974  * gtk_font_chooser_get_font_name:
 975  * @fontchooser: a #GtkFontChooser
 976  *
 977  * Gets the currently-selected font name.
 978  *
 979  * Note that this can be a different string than what you set with
 980  * gtk_font_chooser_set_font_name(), as the font chooser widget may
 981  * normalize font names and thus return a string with a different structure.
 982  * For example, "Helvetica Italic Bold 12" could be normalized to
 983  * "Helvetica Bold Italic 12". Use pango_font_description_equal()
 984  * if you want to compare two font descriptions.
 985  *
 986  * Return value: (transfer full) (allow-none): A string with the name of the
 987  *     current font, or %NULL if  no font is selected. You must free this
 988  *     string with g_free().
 989  *
 990  * Since: 3.2
 991  */
 992 gchar *
 993 gtk_font_chooser_get_font_name (GtkFontChooser *fontchooser)
 994 {
 995   gchar                *font_name;
 996   PangoFontDescription *desc;
 997
 998   if (!fontchooser->priv->face)
 999     return NULL;
1000
1001   desc = pango_font_face_describe (fontchooser->priv->face);
1002   font_name = pango_font_description_to_string (desc);
1003   pango_font_description_free (desc);
1004   return font_name;
1005 }
1006
1007 /* This sets the current font, then selecting the appropriate list rows. */
1008
1009 /**
1010  * gtk_font_chooser_set_font_name:
1011  * @fontchooser: a #GtkFontChooser
1012  * @fontname: a font name like "Helvetica 12" or "Times Bold 18"
1013  *
1014  * Sets the currently-selected font.
1015  *
1016  * Note that the @fontchooser needs to know the screen in which it will appear
1017  * for this to work; this can be guaranteed by simply making sure that the
1018  * @fontchooser is inserted in a toplevel window before you call this function.
1019  *
1020  * Return value: %TRUE if the font could be set successfully; %FALSE if no
1021  *     such font exists or if the @fontchooser doesn't belong to a particular
1022  *     screen yet.
1023  *
1024  * Since: 3.2
1025  */
1026 gboolean
1027 gtk_font_chooser_set_font_name (GtkFontChooser *fontchooser,
1028                                 const gchar      *fontname)
1029 {
1030   GtkFontChooserPrivate *priv = fontchooser->priv;
1031   GtkTreeIter           iter;
1032   gboolean              valid;
1033   gchar                *family_name;
1034   PangoFontDescription *desc;
1035   gboolean              found = FALSE;
1036
1037   g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), FALSE);
1038   g_return_val_if_fail (fontname != NULL, FALSE);
1039
1040   if (!gtk_widget_has_screen (GTK_WIDGET (fontchooser)))
1041     return FALSE;
1042
1043   desc = pango_font_description_from_string (fontname);
1044   family_name = (gchar*)pango_font_description_get_family (desc);
1045
1046   if (!family_name)
1047   {
1048     pango_font_description_free (desc);
1049     return FALSE;
1050   }
1051
1052   /* We make sure the filter is clear */
1053   gtk_entry_set_text (GTK_ENTRY (priv->search_entry), "");
1054
1055   /* We find the matching family/face */
1056   for (valid = gtk_tree_model_get_iter_first (GTK_TREE_MODEL (priv->filter), &iter);
1057        valid;
1058        valid = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->filter), &iter))
1059     {
1060       PangoFontFace        *face;
1061       PangoFontDescription *tmp_desc;
1062
1063       gtk_tree_model_get (GTK_TREE_MODEL (priv->filter), &iter,
1064                           FACE_COLUMN,   &face,
1065                           -1);
1066
1067       tmp_desc = pango_font_face_describe (face);
1068       if (pango_font_description_get_size_is_absolute (desc))
1069         pango_font_description_set_absolute_size (tmp_desc,
1070                                                   pango_font_description_get_size (desc));
1071       else
1072         pango_font_description_set_size (tmp_desc,
1073                                          pango_font_description_get_size (desc));
1074
1075
1076       if (pango_font_description_equal (desc, tmp_desc))
1077         {
1078           GtkTreePath *path;
1079           gint size = pango_font_description_get_size (desc);
1080
1081           if (size)
1082             {
1083               if (pango_font_description_get_size_is_absolute (desc))
1084                 size = size * PANGO_SCALE;
1085               gtk_spin_button_set_value (GTK_SPIN_BUTTON (priv->size_spin),
1086                                          size / PANGO_SCALE);
1087             }
1088
1089           path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->filter),
1090                                           &iter);
1091
1092           if (path)
1093             {
1094               gtk_tree_view_set_cursor (GTK_TREE_VIEW (priv->family_face_list),
1095                                         path,
1096                                         NULL,
1097                                         FALSE);
1098               gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (priv->family_face_list),
1099                                             path,
1100                                             NULL,
1101                                             FALSE,
1102                                             0.5,
1103                                             0.5);
1104               gtk_tree_path_free (path);
1105             }
1106
1107           found = TRUE;
1108         }
1109
1110       g_object_unref (face);
1111       pango_font_description_free (tmp_desc);
1112
1113       if (found)
1114         break;
1115     }
1116
1117   pango_font_description_free (desc);
1118   g_object_notify (G_OBJECT (fontchooser), "font-name");
1119
1120   return found;
1121 }
1122
1123 /**
1124  * gtk_font_chooser_get_preview_text:
1125  * @fontchooser: a #GtkFontChooser
1126  *
1127  * Gets the text displayed in the preview area.
1128  *
1129  * Return value: (transfer none): the text displayed in the
1130  *     preview area. This string is owned by the widget and
1131  *     should not be modified or freed
1132  *
1133  * Since: 3.2
1134  */
1135 const gchar*
1136 gtk_font_chooser_get_preview_text (GtkFontChooser *fontchooser)
1137 {
1138   g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL);
1139   return (const gchar*)fontchooser->priv->preview_text;
1140 }
1141
1142
1143 /**
1144  * gtk_font_chooser_set_preview_text:
1145  * @fontchooser: a #GtkFontChooser
1146  * @text: (transfer none): the text to display in the preview area
1147  *
1148  * Sets the text displayed in the preview area.
1149  * The @text is used to show how the selected font looks.
1150  *
1151  * Since: 3.2
1152  */
1153 void
1154 gtk_font_chooser_set_preview_text  (GtkFontChooser *fontchooser,
1155                                     const gchar    *text)
1156 {
1157   g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser));
1158   g_return_if_fail (text != NULL);
1159
1160   g_free (fontchooser->priv->preview_text);
1161   fontchooser->priv->preview_text = g_strdup (text);
1162
1163   populate_list (fontchooser,
1164                  GTK_TREE_VIEW (fontchooser->priv->family_face_list),
1165                  fontchooser->priv->model);
1166
1167   gtk_entry_set_text (GTK_ENTRY (fontchooser->priv->preview), text);
1168
1169   g_object_notify (G_OBJECT (fontchooser), "preview-text");
1170 }
1171
1172 /**
1173  * gtk_font_chooser_get_show_preview_entry:
1174  * @fontchooser: a #GtkFontChooser
1175  *
1176  * Return value: %TRUE if the preview entry is shown or %FALSE if
1177  *               it is hidden.
1178  * Since: 3.2
1179  */
1180 gboolean
1181 gtk_font_chooser_get_show_preview_entry (GtkFontChooser *fontchooser)
1182 {
1183   g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), FALSE);
1184
1185   return fontchooser->priv->show_preview_entry;
1186 }
1187
1188 /**
1189  * gtk_font_chooser_set_show_preview_entry:
1190  * @fontchooser: a #GtkFontChooser
1191  * @show_preview_entry: whether to show the editable preview entry or not
1192  *
1193  * Shows or hides the editable preview entry.
1194  * Since: 3.2
1195  */
1196 void
1197 gtk_font_chooser_set_show_preview_entry (GtkFontChooser *fontchooser,
1198                                          gboolean        show_preview_entry)
1199 {
1200   g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser));
1201
1202   if (show_preview_entry)
1203     gtk_widget_show (fontchooser->priv->preview_scrolled_window);
1204   else
1205     gtk_widget_hide (fontchooser->priv->preview_scrolled_window);
1206
1207   fontchooser->priv->show_preview_entry = show_preview_entry;
1208   g_object_notify (G_OBJECT (fontchooser), "show-preview-entry");
1209 }