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 slider_change_cb (GtkAdjustment *adjustment,
 296                   gpointer       user_data)
 297 {
 298   GtkFontChooserWidget        *fc    = (GtkFontChooserWidget*)user_data;
 299   GtkFontChooserWidgetPrivate *priv  = fc->priv;
 300   GtkAdjustment         *spin_adj     = gtk_spin_button_get_adjustment(GTK_SPIN_BUTTON (priv->size_spin));
 301   gdouble                slider_value = gtk_adjustment_get_value (adjustment);
 302   gdouble                spin_value   = gtk_adjustment_get_value (spin_adj);
 303
 304   if (slider_value != spin_value)
 305     gtk_adjustment_set_value (spin_adj,
 306                               gtk_adjustment_get_value (adjustment));
 307 }
 308
 309 static void
 310 spin_change_cb (GtkAdjustment *adjustment,
 311                 gpointer       user_data)
 312 {
 313   PangoFontDescription    *desc;
 314   GtkFontChooserWidget          *fontchooser = (GtkFontChooserWidget*)user_data;
 315   GtkFontChooserWidgetPrivate   *priv        = fontchooser->priv;
 316   GtkAdjustment           *slider_adj  = gtk_range_get_adjustment (GTK_RANGE (priv->size_slider));
 317   gdouble size = gtk_adjustment_get_value (adjustment);
 318
 319   desc = pango_context_get_font_description (gtk_widget_get_pango_context (priv->preview));
 320   pango_font_description_set_size (desc, ((gint)size) * PANGO_SCALE);
 321   gtk_widget_override_font (priv->preview, desc);
 322
 323   if (pango_font_description_get_size_is_absolute (priv->font_desc))
 324     pango_font_description_set_absolute_size (priv->font_desc, size);
 325   else
 326     pango_font_description_set_size (priv->font_desc, ((gint)size) * PANGO_SCALE);
 327
 328   gtk_adjustment_set_value (slider_adj, size);
 329
 330   gtk_widget_queue_draw (priv->preview);
 331
 332   g_object_notify (G_OBJECT (fontchooser), "font");
 333   g_object_notify (G_OBJECT (fontchooser), "font-desc");
 334 }
 335
 336 static void
 337 set_range_marks (GtkFontChooserWidgetPrivate *priv,
 338                  GtkWidget             *size_slider,
 339                  gint                  *sizes,
 340                  gint                   length)
 341 {
 342   GtkAdjustment *adj;
 343   gint i;
 344   gdouble value;
 345
 346   if (length < 2)
 347     {
 348       sizes = (gint*)font_sizes;
 349       length = G_N_ELEMENTS (font_sizes);
 350     }
 351
 352   gtk_scale_clear_marks (GTK_SCALE (size_slider));
 353
 354   adj = gtk_range_get_adjustment(GTK_RANGE (size_slider));
 355
 356   gtk_adjustment_set_lower (adj, (gdouble) sizes[0]);
 357   gtk_adjustment_set_upper (adj, (gdouble) sizes[length-1]);
 358
 359   value = gtk_adjustment_get_value (adj);
 360   if (value > (gdouble) sizes[length-1])
 361     gtk_adjustment_set_value (adj, (gdouble) sizes[length-1]);
 362   else if (value < (gdouble) sizes[0])
 363     gtk_adjustment_set_value (adj, (gdouble) sizes[0]);
 364
 365   for (i = 0; i < length; i++)
 366     gtk_scale_add_mark (GTK_SCALE (size_slider),
 367                         (gdouble) sizes[i],
 368                         GTK_POS_BOTTOM, NULL);
 369 }
 370
 371 static void
 372 row_activated_cb (GtkTreeView       *view,
 373                   GtkTreePath       *path,
 374                   GtkTreeViewColumn *column,
 375                   gpointer           user_data)
 376 {
 377   GtkFontChooserWidget *fontchooser = user_data;
 378   gchar *fontname;
 379
 380   fontname = gtk_font_chooser_widget_get_font (fontchooser);
 381   _gtk_font_chooser_font_activated (GTK_FONT_CHOOSER (fontchooser), fontname);
 382   g_free (fontname);
 383 }
 384
 385 static void
 386 cursor_changed_cb (GtkTreeView *treeview,
 387                    gpointer     user_data)
 388 {
 389   GtkFontChooserWidget *fontchooser = (GtkFontChooserWidget*)user_data;
 390   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 391
 392   PangoFontFamily      *family;
 393   PangoFontFace        *face;
 394   PangoFontDescription *desc;
 395
 396   gint *sizes;
 397   gint  i, n_sizes;
 398
 399   GtkTreeIter  iter;
 400   GtkTreePath *path = gtk_tree_path_new ();
 401
 402   gtk_tree_view_get_cursor (treeview, &path, NULL);
 403
 404   if (!path)
 405     return;
 406
 407   if (!gtk_tree_model_get_iter (GTK_TREE_MODEL (priv->filter_model), &iter, path))
 408     {
 409       gtk_tree_path_free (path);
 410       return;
 411     }
 412
 413   gtk_tree_model_get (GTK_TREE_MODEL (priv->filter_model), &iter,
 414                       FACE_COLUMN, &face,
 415                       FAMILY_COLUMN, &family,
 416                       -1);
 417
 418   gtk_tree_view_scroll_to_cell (treeview, path, NULL, FALSE, 0.5, 0.5);
 419
 420   gtk_tree_path_free (path);
 421   path = NULL;
 422
 423   desc = pango_font_face_describe (face);
 424   pango_font_description_set_size (desc, pango_font_description_get_size (priv->font_desc));
 425   gtk_widget_override_font (priv->preview, desc);
 426
 427   pango_font_face_list_sizes (face, &sizes, &n_sizes);
 428   /* It seems not many fonts actually have a sane set of sizes */
 429   for (i = 0; i < n_sizes; i++)
 430     sizes[i] = sizes[i] / PANGO_SCALE;
 431
 432   set_range_marks (priv, priv->size_slider, sizes, n_sizes);
 433
 434   if (priv->family)
 435     g_object_unref (priv->family);
 436   priv->family = family;
 437
 438   if (priv->face)
 439     g_object_unref (priv->face);
 440   priv->face = face;
 441
 442   if (priv->font_desc)
 443     pango_font_description_free (priv->font_desc);
 444   priv->font_desc = desc;
 445
 446   g_object_notify (G_OBJECT (fontchooser), "font");
 447   g_object_notify (G_OBJECT (fontchooser), "font-desc");
 448 }
 449
 450 static gboolean
 451 zoom_preview_cb (GtkWidget      *scrolled_window,
 452                  GdkEventScroll *event,
 453                  gpointer        user_data)
 454 {
 455   GtkFontChooserWidget        *fc    = (GtkFontChooserWidget*)user_data;
 456   GtkFontChooserWidgetPrivate *priv  = fc->priv;
 457
 458   GtkAdjustment *adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin));
 459
 460   if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_RIGHT)
 461     gtk_adjustment_set_value (adj,
 462                               gtk_adjustment_get_value (adj) +
 463                               gtk_adjustment_get_step_increment (adj));
 464   else if (event->direction == GDK_SCROLL_DOWN || event->direction == GDK_SCROLL_LEFT)
 465     gtk_adjustment_set_value (adj,
 466                               gtk_adjustment_get_value (adj) -
 467                               gtk_adjustment_get_step_increment (adj));
 468   return TRUE;
 469 }
 470
 471 static void
 472 row_inserted_cb (GtkTreeModel *model,
 473                  GtkTreePath  *path,
 474                  GtkTreeIter  *iter,
 475                  gpointer      user_data)
 476 {
 477   GtkFontChooserWidget        *fontchooser = (GtkFontChooserWidget*)user_data;
 478   GtkFontChooserWidgetPrivate *priv        = fontchooser->priv;
 479
 480   gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->list_notebook), 0);
 481 }
 482
 483 static void
 484 row_deleted_cb  (GtkTreeModel *model,
 485                  GtkTreePath  *path,
 486                  gpointer      user_data)
 487 {
 488   GtkFontChooserWidget        *fontchooser = (GtkFontChooserWidget*)user_data;
 489   GtkFontChooserWidgetPrivate *priv        = fontchooser->priv;
 490
 491   if (gtk_tree_model_iter_n_children (model, NULL) == 0)
 492     gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->list_notebook), 1);
 493 }
 494
 495 static void
 496 gtk_font_chooser_widget_init (GtkFontChooserWidget *fontchooser)
 497 {
 498   GIcon                   *icon;
 499   GtkFontChooserWidgetPrivate   *priv;
 500   const PangoFontDescription *font_desc;
 501   GtkWidget               *scrolled_win;
 502   GtkWidget               *grid;
 503
 504   fontchooser->priv = G_TYPE_INSTANCE_GET_PRIVATE (fontchooser,
 505                                                    GTK_TYPE_FONT_CHOOSER_WIDGET,
 506                                                    GtkFontChooserWidgetPrivate);
 507
 508   priv = fontchooser->priv;
 509
 510   /* Default preview string  */
 511   priv->preview_text = g_strdup (pango_language_get_sample_string (NULL));
 512   priv->show_preview_entry = TRUE;
 513
 514   gtk_widget_push_composite_child ();
 515
 516   /* Creating fundamental widgets for the private struct */
 517   priv->search_entry = gtk_entry_new ();
 518   priv->family_face_list = gtk_tree_view_new ();
 519   priv->preview = gtk_entry_new ();
 520   priv->size_slider = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL,
 521                                                 (gdouble) font_sizes[0],
 522                                                 (gdouble) font_sizes[G_N_ELEMENTS (font_sizes) - 1],
 523                                                 1.0);
 524
 525   priv->size_spin = gtk_spin_button_new_with_range (0.0, (gdouble)(G_MAXINT / PANGO_SCALE), 1.0);
 526
 527   /** Bootstrapping widget layout **/
 528   gtk_box_set_spacing (GTK_BOX (fontchooser), 6);
 529
 530   /* Main font family/face view */
 531   priv->list_scrolled_window = gtk_scrolled_window_new (NULL, NULL);
 532   scrolled_win = priv->list_scrolled_window;
 533   gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_win),
 534                                   GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 535   gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolled_win),
 536                                        GTK_SHADOW_ETCHED_IN);
 537   gtk_widget_set_size_request (scrolled_win, 400, 300);
 538   gtk_container_add (GTK_CONTAINER (scrolled_win), priv->family_face_list);
 539
 540   /* Text to display when list is empty */
 541   priv->empty_list = gtk_label_new (_(NO_FONT_MATCHED_SEARCH));
 542   gtk_widget_set_margin_top    (priv->empty_list, 12);
 543   gtk_widget_set_margin_left   (priv->empty_list, 12);
 544   gtk_widget_set_margin_right  (priv->empty_list, 12);
 545   gtk_widget_set_margin_bottom (priv->empty_list, 12);
 546   gtk_widget_set_halign (priv->empty_list, GTK_ALIGN_CENTER);
 547   gtk_widget_set_valign (priv->empty_list, GTK_ALIGN_START);
 548
 549   priv->list_notebook = gtk_notebook_new ();
 550   gtk_notebook_set_show_tabs (GTK_NOTEBOOK (priv->list_notebook), FALSE);
 551   gtk_notebook_append_page (GTK_NOTEBOOK (priv->list_notebook), scrolled_win, NULL);
 552   gtk_notebook_append_page (GTK_NOTEBOOK (priv->list_notebook), priv->empty_list, NULL);
 553
 554   /* Basic layout */
 555   grid = gtk_grid_new ();
 556
 557   gtk_grid_set_column_spacing (GTK_GRID (grid), 6);
 558   gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
 559
 560   gtk_grid_attach (GTK_GRID (grid), priv->search_entry, 0, 0, 2, 1);
 561   gtk_grid_attach (GTK_GRID (grid), priv->list_notebook, 0, 1, 2, 1);
 562   gtk_grid_attach (GTK_GRID (grid), priv->preview,      0, 2, 2, 1);
 563
 564   gtk_grid_attach (GTK_GRID (grid), priv->size_slider,  0, 3, 1, 1);
 565   gtk_grid_attach (GTK_GRID (grid), priv->size_spin,    1, 3, 1, 1);
 566
 567   gtk_widget_set_hexpand  (GTK_WIDGET (scrolled_win),      TRUE);
 568   gtk_widget_set_vexpand  (GTK_WIDGET (scrolled_win),      TRUE);
 569   gtk_widget_set_hexpand  (GTK_WIDGET (priv->search_entry), TRUE);
 570
 571   gtk_widget_set_hexpand  (GTK_WIDGET (priv->size_slider), TRUE);
 572   gtk_widget_set_hexpand  (GTK_WIDGET (priv->size_spin),   FALSE);
 573
 574   gtk_box_pack_start (GTK_BOX (fontchooser), grid, TRUE, TRUE, 0);
 575
 576   gtk_widget_show_all (GTK_WIDGET (fontchooser));
 577   gtk_widget_hide     (GTK_WIDGET (fontchooser));
 578
 579   /* Treeview column and model bootstrapping */
 580   gtk_font_chooser_widget_bootstrap_fontlist (fontchooser);
 581
 582   /* Set default preview text */
 583   gtk_entry_set_text (GTK_ENTRY (priv->preview),
 584                       pango_language_get_sample_string (NULL));
 585
 586   /* Set search icon and place holder text */
 587   icon = g_themed_icon_new_with_default_fallbacks ("edit-find-symbolic");
 588   g_object_set (G_OBJECT (priv->search_entry),
 589                 "secondary-icon-gicon", icon,
 590                 "secondary-icon-activatable", FALSE,
 591                 "secondary-icon-sensitive", FALSE,
 592                 NULL);
 593   g_object_unref (icon);
 594
 595   gtk_entry_set_placeholder_text (GTK_ENTRY (priv->search_entry), _("Search font name"));
 596
 597   /** Callback connections **/
 598   g_signal_connect (priv->search_entry, "notify::text",
 599                     G_CALLBACK (text_changed_cb), fontchooser);
 600   g_signal_connect (priv->search_entry,
 601                     "icon-press", G_CALLBACK (icon_press_cb), NULL);
 602
 603   g_signal_connect (gtk_range_get_adjustment (GTK_RANGE (priv->size_slider)),
 604                     "value-changed", G_CALLBACK (slider_change_cb), fontchooser);
 605   g_signal_connect (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin)),
 606                     "value-changed", G_CALLBACK (spin_change_cb), fontchooser);
 607
 608   g_signal_connect (priv->family_face_list, "cursor-changed",
 609                     G_CALLBACK (cursor_changed_cb), fontchooser);
 610   g_signal_connect (priv->family_face_list, "row-activated",
 611                     G_CALLBACK (row_activated_cb), fontchooser);
 612
 613   /* Zoom on preview scroll */
 614   g_signal_connect (priv->preview, "scroll-event",
 615                     G_CALLBACK (zoom_preview_cb), fontchooser);
 616
 617   g_signal_connect (priv->size_slider, "scroll-event",
 618                     G_CALLBACK (zoom_preview_cb), fontchooser);
 619
 620   set_range_marks (priv, priv->size_slider, (gint*)font_sizes, G_N_ELEMENTS (font_sizes));
 621
 622   /* Font list empty hides the scrolledwindow */
 623   g_signal_connect (G_OBJECT (priv->filter_model), "row-deleted",
 624                     G_CALLBACK (row_deleted_cb), fontchooser);
 625   g_signal_connect (G_OBJECT (priv->filter_model), "row-inserted",
 626                     G_CALLBACK (row_inserted_cb), fontchooser);
 627
 628   /* Set default focus */
 629   gtk_widget_pop_composite_child ();
 630
 631   gtk_font_chooser_widget_take_font_desc (fontchooser, NULL);
 632 }
 633
 634 /**
 635  * gtk_font_chooser_widget_new:
 636  *
 637  * Creates a new #GtkFontChooserWidget.
 638  *
 639  * Return value: a new #GtkFontChooserWidget
 640  *
 641  * Since: 3.2
 642  */
 643 GtkWidget *
 644 gtk_font_chooser_widget_new (void)
 645 {
 646   return g_object_new (GTK_TYPE_FONT_CHOOSER_WIDGET, NULL);
 647 }
 648
 649 static int
 650 cmp_families (const void *a,
 651               const void *b)
 652 {
 653   const char *a_name = pango_font_family_get_name (*(PangoFontFamily **)a);
 654   const char *b_name = pango_font_family_get_name (*(PangoFontFamily **)b);
 655
 656   return g_utf8_collate (a_name, b_name);
 657 }
 658
 659 static void
 660 populate_list (GtkFontChooserWidget *fontchooser,
 661                GtkTreeView    *treeview,
 662                GtkListStore   *model)
 663 {
 664   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 665   GtkStyleContext *style_context;
 666   PangoFontDescription *default_font;
 667   PangoFontDescription *selected_font;
 668
 669   gint match;
 670   GtkTreeIter match_row;
 671   GtkTreePath *path;
 672
 673   gint n_families, i;
 674   PangoFontFamily **families;
 675   gchar *tmp;
 676   gchar *family_and_face;
 677
 678   pango_context_list_families (gtk_widget_get_pango_context (GTK_WIDGET (treeview)),
 679                                &families,
 680                                &n_families);
 681
 682   qsort (families, n_families, sizeof (PangoFontFamily *), cmp_families);
 683
 684   style_context = gtk_widget_get_style_context (GTK_WIDGET (treeview));
 685   default_font = (PangoFontDescription*) gtk_style_context_get_font (style_context,
 686                                                                      GTK_STATE_NORMAL);
 687
 688   if (priv->face)
 689     selected_font = pango_font_face_describe (priv->face);
 690   else
 691     selected_font = NULL;
 692
 693   gtk_list_store_clear (model);
 694
 695   match = 0;
 696
 697   /* Iterate over families and faces */
 698   for (i = 0; i < n_families; i++)
 699     {
 700       GtkTreeIter     iter;
 701       PangoFontFace **faces;
 702       int             j, n_faces;
 703       const gchar    *fam_name = pango_font_family_get_name (families[i]);
 704
 705       pango_font_family_list_faces (families[i], &faces, &n_faces);
 706
 707       for (j = 0; j < n_faces; j++)
 708         {
 709           PangoFontDescription *pango_desc;
 710           const gchar *face_name;
 711           gchar *font_desc;
 712
 713           pango_desc = pango_font_face_describe (faces[j]);
 714           face_name = pango_font_face_get_face_name (faces[j]);
 715           font_desc = pango_font_description_to_string (pango_desc);
 716
 717           family_and_face = g_strconcat (fam_name, " ", face_name, NULL);
 718           tmp = g_markup_printf_escaped (ROW_FORMAT_STRING,
 719                                          family_and_face,
 720                                          font_desc,
 721                                          fontchooser->priv->preview_text);
 722
 723           gtk_list_store_insert_with_values (model, &iter, -1,
 724                                              FAMILY_COLUMN, families[i],
 725                                              FACE_COLUMN, faces[j],
 726                                              FONT_DESC_COLUMN, pango_desc,
 727                                              PREVIEW_TITLE_COLUMN, family_and_face,
 728                                              PREVIEW_TEXT_COLUMN, tmp,
 729                                              -1);
 730
 731           /* Select the current font,
 732            * the default font/face from the theme,
 733            * or the first font
 734            */
 735           if (match < 3 &&
 736               selected_font != NULL &&
 737               pango_font_description_equal (selected_font, pango_desc))
 738             {
 739               match_row = iter;
 740               match = 3;
 741             }
 742           if (match < 2 &&
 743               strcmp (fam_name, pango_font_description_get_family (default_font)) == 0)
 744             {
 745               match_row = iter;
 746               match = 2;
 747             }
 748           if (match < 1)
 749             {
 750               match_row = iter;
 751               match = 1;
 752             }
 753
 754           pango_font_description_free (pango_desc);
 755           g_free (family_and_face);
 756           g_free (tmp);
 757           g_free (font_desc);
 758         }
 759
 760       g_free (faces);
 761     }
 762
 763   path = gtk_tree_model_get_path (GTK_TREE_MODEL (model), &match_row);
 764   if (path)
 765     {
 766       gtk_tree_view_set_cursor (treeview, path, NULL, FALSE);
 767       gtk_tree_view_scroll_to_cell (treeview, path, NULL, FALSE, 0.5, 0.5);
 768       gtk_tree_path_free (path);
 769     }
 770
 771   if (selected_font)
 772     pango_font_description_free (selected_font);
 773
 774   g_free (families);
 775 }
 776
 777 static gboolean
 778 visible_func (GtkTreeModel *model,
 779               GtkTreeIter  *iter,
 780               gpointer      user_data)
 781 {
 782   GtkFontChooserWidgetPrivate *priv = user_data;
 783   gboolean result = TRUE;
 784   const gchar *search_text;
 785   gchar **split_terms;
 786   gchar *font_name, *font_name_casefold, *term_casefold;
 787   guint i;
 788
 789   if (priv->filter_func != NULL)
 790     {
 791       PangoFontFamily *family;
 792       PangoFontFace *face;
 793
 794       gtk_tree_model_get (model, iter,
 795                           FAMILY_COLUMN, &family,
 796                           FACE_COLUMN, &face,
 797                           -1);
 798
 799       result = priv->filter_func (family, face, priv->filter_data);
 800
 801       g_object_unref (family);
 802       g_object_unref (face);
 803
 804       if (!result)
 805         return FALSE;
 806     }
 807
 808   /* If there's no filter string we show the item */
 809   search_text = gtk_entry_get_text (GTK_ENTRY (priv->search_entry));
 810   if (strlen (search_text) == 0)
 811     return TRUE;
 812
 813   gtk_tree_model_get (model, iter,
 814                       PREVIEW_TITLE_COLUMN, &font_name,
 815                       -1);
 816
 817   if (font_name == NULL)
 818     return FALSE;
 819
 820   split_terms = g_strsplit (search_text, " ", 0);
 821   font_name_casefold = g_utf8_casefold (font_name, -1);
 822
 823   for (i = 0; split_terms[i] && result; i++)
 824     {
 825       gchar* term_casefold = g_utf8_casefold (split_terms[i], -1);
 826
 827       if (!strstr (font_name_casefold, term_casefold))
 828         result = FALSE;
 829
 830       g_free (term_casefold);
 831     }
 832
 833   g_free (font_name_casefold);
 834   g_free (font_name);
 835   g_strfreev (split_terms);
 836
 837   return result;
 838 }
 839
 840 static void
 841 gtk_font_chooser_widget_bootstrap_fontlist (GtkFontChooserWidget *fontchooser)
 842 {
 843   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 844   GtkTreeView       *treeview = GTK_TREE_VIEW (priv->family_face_list);
 845   GtkCellRenderer   *cell;
 846   GtkTreeViewColumn *col;
 847
 848   priv->model = gtk_list_store_new (5,
 849                                     PANGO_TYPE_FONT_FAMILY,
 850                                     PANGO_TYPE_FONT_FACE,
 851                                     PANGO_TYPE_FONT_DESCRIPTION,
 852                                     G_TYPE_STRING,
 853                                     G_TYPE_STRING);
 854
 855   priv->filter_model = gtk_tree_model_filter_new (GTK_TREE_MODEL (priv->model), NULL);
 856   g_object_unref (priv->model);
 857
 858   gtk_tree_model_filter_set_visible_func (GTK_TREE_MODEL_FILTER (priv->filter_model),
 859                                           visible_func, (gpointer)priv, NULL);
 860
 861   gtk_tree_view_set_model (treeview, GTK_TREE_MODEL (priv->filter_model));
 862   g_object_unref (priv->filter_model);
 863
 864   gtk_tree_view_set_rules_hint      (treeview, TRUE);
 865   gtk_tree_view_set_headers_visible (treeview, FALSE);
 866
 867   cell = gtk_cell_renderer_text_new ();
 868   col = gtk_tree_view_column_new_with_attributes (_("Font Family"),
 869                                                   cell,
 870                                                   "markup", PREVIEW_TEXT_COLUMN,
 871                                                   NULL);
 872
 873   g_object_set (cell, "ellipsize", PANGO_ELLIPSIZE_END, NULL);
 874
 875   gtk_tree_view_append_column (treeview, col);
 876
 877   populate_list (fontchooser, treeview, priv->model);
 878 }
 879
 880 static void
 881 gtk_font_chooser_widget_finalize (GObject *object)
 882 {
 883   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);
 884   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 885
 886   if (priv->font_desc)
 887     pango_font_description_free (priv->font_desc);
 888
 889   if (priv->family)
 890     g_object_unref (priv->family);
 891
 892   if (priv->face)
 893     g_object_unref (priv->face);
 894
 895   if (priv->filter_data_destroy)
 896     priv->filter_data_destroy (priv->filter_data);
 897
 898   G_OBJECT_CLASS (gtk_font_chooser_widget_parent_class)->finalize (object);
 899 }
 900
 901 static void
 902 gtk_font_chooser_widget_screen_changed (GtkWidget *widget,
 903                                         GdkScreen *previous_screen)
 904 {
 905   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (widget);
 906   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 907
 908   if (GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->screen_changed)
 909     GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->screen_changed (widget, previous_screen);
 910
 911   if (previous_screen == NULL)
 912     previous_screen = gdk_screen_get_default ();
 913
 914   if (previous_screen == gtk_widget_get_screen (widget))
 915     return;
 916
 917   populate_list (fontchooser,
 918                  GTK_TREE_VIEW (priv->family_face_list),
 919                  priv->model);
 920
 921   gtk_font_chooser_widget_select_font (fontchooser);
 922 }
 923
 924 static PangoFontFamily *
 925 gtk_font_chooser_widget_get_family (GtkFontChooser *chooser)
 926 {
 927   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
 928
 929   return fontchooser->priv->family;
 930 }
 931
 932 static PangoFontFace *
 933 gtk_font_chooser_widget_get_face (GtkFontChooser *chooser)
 934 {
 935   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
 936
 937   return fontchooser->priv->face;
 938 }
 939
 940 static gint
 941 gtk_font_chooser_widget_get_size (GtkFontChooser *chooser)
 942 {
 943   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
 944
 945   return pango_font_description_get_size (fontchooser->priv->font_desc);
 946 }
 947
 948 static gchar *
 949 gtk_font_chooser_widget_get_font (GtkFontChooserWidget *fontchooser)
 950 {
 951   return pango_font_description_to_string (fontchooser->priv->font_desc);
 952 }
 953
 954 static PangoFontDescription *
 955 gtk_font_chooser_widget_get_font_desc (GtkFontChooserWidget *fontchooser)
 956 {
 957   return fontchooser->priv->font_desc;
 958 }
 959
 960 static void
 961 gtk_font_chooser_widget_set_font (GtkFontChooserWidget *fontchooser,
 962                                   const gchar          *fontname)
 963 {
 964   PangoFontDescription *font_desc;
 965
 966   font_desc = pango_font_description_from_string (fontname);
 967   gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc);
 968 }
 969
 970 static void
 971 gtk_font_chooser_widget_take_font_desc (GtkFontChooserWidget *fontchooser,
 972                                         PangoFontDescription *font_desc)
 973 {
 974   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 975
 976   if (font_desc && priv->font_desc &&
 977       pango_font_description_equal (font_desc, priv->font_desc))
 978     {
 979       pango_font_description_free (font_desc);
 980       return;
 981     }
 982
 983   if (priv->font_desc)
 984     pango_font_description_free (priv->font_desc);
 985   if (font_desc)
 986     priv->font_desc = font_desc; /* adopted */
 987   else
 988     priv->font_desc = pango_font_description_from_string (GTK_FONT_CHOOSER_DEFAULT_FONT_NAME);
 989
 990   gtk_font_chooser_widget_select_font (fontchooser);
 991 }
 992
 993 static void
 994 gtk_font_chooser_widget_select_font (GtkFontChooserWidget *fontchooser)
 995 {
 996   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 997   const PangoFontDescription *desc;
 998   const gchar *family_name;
 999   gint font_size;
1000   gboolean font_size_is_absolute;
1001   GtkTreeIter iter;
1002   gboolean valid;
1003   gboolean found = FALSE;
1004
1005   desc = priv->font_desc;
1006   g_assert (desc != NULL);
1007
1008   font_size = pango_font_description_get_size (desc);
1009   font_size_is_absolute = pango_font_description_get_size_is_absolute (desc);
1010   family_name = pango_font_description_get_family (desc);
1011
1012   /* We make sure the filter is clear */
1013   gtk_entry_set_text (GTK_ENTRY (priv->search_entry), "");
1014
1015   if (!family_name)
1016     goto deselect;
1017
1018   /* We find the matching family/face */
1019   for (valid = gtk_tree_model_get_iter_first (GTK_TREE_MODEL (priv->filter_model), &iter);
1020        valid;
1021        valid = gtk_tree_model_iter_next (GTK_TREE_MODEL (priv->filter_model), &iter))
1022     {
1023       PangoFontFace        *face;
1024       PangoFontDescription *tmp_desc;
1025
1026       gtk_tree_model_get (GTK_TREE_MODEL (priv->filter_model), &iter,
1027                           FACE_COLUMN, &face,
1028                           -1);
1029
1030       tmp_desc = pango_font_face_describe (face);
1031       if (font_size_is_absolute)
1032         pango_font_description_set_absolute_size (tmp_desc, font_size);
1033       else
1034         pango_font_description_set_size (tmp_desc, font_size);
1035
1036       if (pango_font_description_equal (desc, tmp_desc))
1037         {
1038           GtkTreePath *path;
1039
1040           if (font_size)
1041             {
1042               if (font_size_is_absolute)
1043                 font_size *= PANGO_SCALE;
1044               gtk_spin_button_set_value (GTK_SPIN_BUTTON (priv->size_spin),
1045                                          font_size / PANGO_SCALE);
1046             }
1047
1048           path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->filter_model), &iter);
1049
1050           if (path)
1051             {
1052               gtk_tree_view_set_cursor (GTK_TREE_VIEW (priv->family_face_list),
1053                                         path,
1054                                         NULL,
1055                                         FALSE);
1056               gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (priv->family_face_list),
1057                                             path,
1058                                             NULL,
1059                                             FALSE,
1060                                             0.5,
1061                                             0.5);
1062               gtk_tree_path_free (path);
1063             }
1064
1065           found = TRUE;
1066         }
1067
1068       g_object_unref (face);
1069       pango_font_description_free (tmp_desc);
1070
1071       if (found)
1072         break;
1073     }
1074
1075 deselect:
1076   if (!found)
1077     {
1078       gtk_tree_selection_unselect_all
1079         (gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->family_face_list)));
1080     }
1081 }
1082
1083 static const gchar*
1084 gtk_font_chooser_widget_get_preview_text (GtkFontChooserWidget *fontchooser)
1085 {
1086   return fontchooser->priv->preview_text;
1087 }
1088
1089 static void
1090 gtk_font_chooser_widget_set_preview_text (GtkFontChooserWidget *fontchooser,
1091                                           const gchar          *text)
1092 {
1093   g_free (fontchooser->priv->preview_text);
1094   fontchooser->priv->preview_text = g_strdup (text);
1095
1096   populate_list (fontchooser,
1097                  GTK_TREE_VIEW (fontchooser->priv->family_face_list),
1098                  fontchooser->priv->model);
1099
1100   gtk_entry_set_text (GTK_ENTRY (fontchooser->priv->preview), text);
1101
1102   g_object_notify (G_OBJECT (fontchooser), "preview-text");
1103 }
1104
1105 static gboolean
1106 gtk_font_chooser_widget_get_show_preview_entry (GtkFontChooserWidget *fontchooser)
1107 {
1108   return fontchooser->priv->show_preview_entry;
1109 }
1110
1111 static void
1112 gtk_font_chooser_widget_set_show_preview_entry (GtkFontChooserWidget *fontchooser,
1113                                                 gboolean              show_preview_entry)
1114 {
1115   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1116
1117   if (priv->show_preview_entry != show_preview_entry)
1118     {
1119       fontchooser->priv->show_preview_entry = show_preview_entry;
1120
1121       if (show_preview_entry)
1122         gtk_widget_show (fontchooser->priv->preview);
1123       else
1124         gtk_widget_hide (fontchooser->priv->preview);
1125
1126       g_object_notify (G_OBJECT (fontchooser), "show-preview-entry");
1127     }
1128 }
1129
1130 static void
1131 gtk_font_chooser_widget_set_filter_func (GtkFontChooser  *chooser,
1132                                          GtkFontFilterFunc filter,
1133                                          gpointer          data,
1134                                          GDestroyNotify    destroy)
1135 {
1136   GtkFontChooserWidget        *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
1137   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1138
1139   if (priv->filter_data_destroy)
1140     priv->filter_data_destroy (priv->filter_data);
1141
1142   priv->filter_func = filter;
1143   priv->filter_data = data;
1144   priv->filter_data_destroy = destroy;
1145
1146   gtk_tree_model_filter_refilter (GTK_TREE_MODEL_FILTER (priv->filter_model));
1147 }
1148
1149 static void
1150 gtk_font_chooser_widget_iface_init (GtkFontChooserIface *iface)
1151 {
1152   iface->get_font_family = gtk_font_chooser_widget_get_family;
1153   iface->get_font_face = gtk_font_chooser_widget_get_face;
1154   iface->get_font_size = gtk_font_chooser_widget_get_size;
1155   iface->set_filter_func = gtk_font_chooser_widget_set_filter_func;
1156 }