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   GtkTreeModel *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   GtkTreeIter           font_iter;      /* invalid if font not available or pointer into model
  96                                            (not filter_model) to the row containing font */
  97   PangoFontFace   *face;
  98   PangoFontFamily *family;
  99
 100   GtkFontFilterFunc filter_func;
 101   gpointer          filter_data;
 102   GDestroyNotify    filter_data_destroy;
 103 };
 104
 105 /* This is the initial fixed height and the top padding of the preview entry */
 106 #define PREVIEW_HEIGHT 72
 107 #define PREVIEW_TOP_PADDING 6
 108
 109 /* These are the sizes of the font, style & size lists. */
 110 #define FONT_LIST_HEIGHT  136
 111 #define FONT_LIST_WIDTH   190
 112 #define FONT_STYLE_LIST_WIDTH 170
 113 #define FONT_SIZE_LIST_WIDTH  60
 114
 115 #define ROW_FORMAT_STRING "<span weight=\"bold\" size=\"small\">%s</span>\n<span size=\"x-large\" font_desc=\"%s\">%s</span>"
 116
 117 #define NO_FONT_MATCHED_SEARCH N_("No fonts matched your search. You can revise your search and try again.")
 118
 119 /* These are what we use as the standard font sizes, for the size list.
 120  */
 121 static const gint font_sizes[] = {
 122   6, 8, 9, 10, 11, 12, 13, 14, 16, 20, 24, 36, 48, 72
 123 };
 124
 125 enum {
 126   FAMILY_COLUMN,
 127   FACE_COLUMN,
 128   FONT_DESC_COLUMN,
 129   PREVIEW_TITLE_COLUMN
 130 };
 131
 132 static void gtk_font_chooser_widget_set_property         (GObject         *object,
 133                                                           guint            prop_id,
 134                                                           const GValue    *value,
 135                                                           GParamSpec      *pspec);
 136 static void gtk_font_chooser_widget_get_property         (GObject         *object,
 137                                                           guint            prop_id,
 138                                                           GValue          *value,
 139                                                           GParamSpec      *pspec);
 140 static void gtk_font_chooser_widget_finalize             (GObject         *object);
 141
 142 static void gtk_font_chooser_widget_screen_changed       (GtkWidget       *widget,
 143                                                           GdkScreen       *previous_screen);
 144
 145 static void gtk_font_chooser_widget_bootstrap_fontlist   (GtkFontChooserWidget *fontchooser);
 146
 147 static void gtk_font_chooser_widget_select_font          (GtkFontChooserWidget *fontchooser);
 148
 149 static gchar   *gtk_font_chooser_widget_get_font         (GtkFontChooserWidget *fontchooser);
 150 static void     gtk_font_chooser_widget_set_font         (GtkFontChooserWidget *fontchooser,
 151                                                           const gchar          *fontname);
 152
 153 static PangoFontDescription *gtk_font_chooser_widget_get_font_desc  (GtkFontChooserWidget *fontchooser);
 154 static void                  gtk_font_chooser_widget_take_font_desc (GtkFontChooserWidget *fontchooser,
 155                                                                      PangoFontDescription *font_desc);
 156
 157
 158 static const gchar *gtk_font_chooser_widget_get_preview_text (GtkFontChooserWidget *fontchooser);
 159 static void         gtk_font_chooser_widget_set_preview_text (GtkFontChooserWidget *fontchooser,
 160                                                               const gchar          *text);
 161
 162 static gboolean gtk_font_chooser_widget_get_show_preview_entry (GtkFontChooserWidget *fontchooser);
 163 static void     gtk_font_chooser_widget_set_show_preview_entry (GtkFontChooserWidget *fontchooser,
 164                                                                 gboolean              show_preview_entry);
 165
 166 static void gtk_font_chooser_widget_iface_init (GtkFontChooserIface *iface);
 167
 168 G_DEFINE_TYPE_WITH_CODE (GtkFontChooserWidget, gtk_font_chooser_widget, GTK_TYPE_BOX,
 169                          G_IMPLEMENT_INTERFACE (GTK_TYPE_FONT_CHOOSER,
 170                                                 gtk_font_chooser_widget_iface_init))
 171
 172 static void
 173 gtk_font_chooser_widget_class_init (GtkFontChooserWidgetClass *klass)
 174 {
 175   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 176   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
 177
 178   widget_class->screen_changed = gtk_font_chooser_widget_screen_changed;
 179
 180   gobject_class->finalize = gtk_font_chooser_widget_finalize;
 181   gobject_class->set_property = gtk_font_chooser_widget_set_property;
 182   gobject_class->get_property = gtk_font_chooser_widget_get_property;
 183
 184   _gtk_font_chooser_install_properties (gobject_class);
 185
 186   g_type_class_add_private (klass, sizeof (GtkFontChooserWidgetPrivate));
 187 }
 188
 189 static void
 190 gtk_font_chooser_widget_set_property (GObject         *object,
 191                                       guint            prop_id,
 192                                       const GValue    *value,
 193                                       GParamSpec      *pspec)
 194 {
 195   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);
 196
 197   switch (prop_id)
 198     {
 199     case GTK_FONT_CHOOSER_PROP_FONT:
 200       gtk_font_chooser_widget_set_font (fontchooser, g_value_get_string (value));
 201       break;
 202     case GTK_FONT_CHOOSER_PROP_FONT_DESC:
 203       gtk_font_chooser_widget_take_font_desc (fontchooser, g_value_dup_boxed (value));
 204       break;
 205     case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT:
 206       gtk_font_chooser_widget_set_preview_text (fontchooser, g_value_get_string (value));
 207       break;
 208     case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY:
 209       gtk_font_chooser_widget_set_show_preview_entry (fontchooser, g_value_get_boolean (value));
 210       break;
 211     default:
 212       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 213       break;
 214     }
 215 }
 216
 217 static void
 218 gtk_font_chooser_widget_get_property (GObject         *object,
 219                                       guint            prop_id,
 220                                       GValue          *value,
 221                                       GParamSpec      *pspec)
 222 {
 223   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);
 224
 225   switch (prop_id)
 226     {
 227     case GTK_FONT_CHOOSER_PROP_FONT:
 228       g_value_take_string (value, gtk_font_chooser_widget_get_font (fontchooser));
 229       break;
 230     case GTK_FONT_CHOOSER_PROP_FONT_DESC:
 231       g_value_set_boxed (value, gtk_font_chooser_widget_get_font_desc (fontchooser));
 232       break;
 233     case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT:
 234       g_value_set_string (value, gtk_font_chooser_widget_get_preview_text (fontchooser));
 235       break;
 236     case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY:
 237       g_value_set_boolean (value, gtk_font_chooser_widget_get_show_preview_entry (fontchooser));
 238       break;
 239     default:
 240       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 241       break;
 242     }
 243 }
 244
 245 static void
 246 text_changed_cb (GtkEntry       *entry,
 247                  GParamSpec     *pspec,
 248                  GtkFontChooserWidget *fc)
 249 {
 250   GtkFontChooserWidgetPrivate *priv = fc->priv;
 251   const gchar *text;
 252
 253   text = gtk_entry_get_text (entry);
 254
 255   if (text == NULL || text[0] == '\0')
 256     {
 257       GIcon *icon;
 258
 259       icon = g_themed_icon_new_with_default_fallbacks ("edit-find-symbolic");
 260       g_object_set (G_OBJECT (priv->search_entry),
 261                     "secondary-icon-gicon", icon,
 262                     "secondary-icon-activatable", FALSE,
 263                     "secondary-icon-sensitive", FALSE,
 264                     NULL);
 265       g_object_unref (icon);
 266     }
 267   else
 268     {
 269       if (!gtk_entry_get_icon_activatable (GTK_ENTRY (priv->search_entry), GTK_ENTRY_ICON_SECONDARY))
 270         {
 271           GIcon *icon;
 272
 273           icon = g_themed_icon_new_with_default_fallbacks ("edit-clear-symbolic");
 274           g_object_set (G_OBJECT (priv->search_entry),
 275                         "secondary-icon-gicon", icon,
 276                         "secondary-icon-activatable", TRUE,
 277                         "secondary-icon-sensitive", TRUE,
 278                         NULL);
 279           g_object_unref (icon);
 280         }
 281     }
 282
 283   gtk_tree_model_filter_refilter (GTK_TREE_MODEL_FILTER (priv->filter_model));
 284 }
 285
 286 static void
 287 icon_press_cb (GtkEntry             *entry,
 288                GtkEntryIconPosition  pos,
 289                GdkEvent             *event,
 290                gpointer              user_data)
 291 {
 292   gtk_entry_set_text (entry, "");
 293 }
 294
 295 static void
 296 size_change_cb (GtkAdjustment *adjustment,
 297                 gpointer       user_data)
 298 {
 299   GtkFontChooserWidget *fontchooser = user_data;
 300   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 301   PangoFontDescription *font_desc;
 302   gdouble size = gtk_adjustment_get_value (adjustment);
 303
 304   font_desc = pango_font_description_new ();
 305   if (pango_font_description_get_size_is_absolute (priv->font_desc))
 306     pango_font_description_set_absolute_size (font_desc, size * PANGO_SCALE);
 307   else
 308     pango_font_description_set_size (font_desc, size * PANGO_SCALE);
 309
 310   gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc);
 311 }
 312
 313 static void
 314 set_range_marks (GtkFontChooserWidgetPrivate *priv,
 315                  GtkWidget             *size_slider,
 316                  gint                  *sizes,
 317                  gint                   length)
 318 {
 319   GtkAdjustment *adj;
 320   gint i;
 321   gdouble value;
 322
 323   if (length < 2)
 324     {
 325       sizes = (gint*)font_sizes;
 326       length = G_N_ELEMENTS (font_sizes);
 327     }
 328
 329   gtk_scale_clear_marks (GTK_SCALE (size_slider));
 330
 331   adj = gtk_range_get_adjustment(GTK_RANGE (size_slider));
 332
 333   gtk_adjustment_set_lower (adj, (gdouble) sizes[0]);
 334   gtk_adjustment_set_upper (adj, (gdouble) sizes[length-1]);
 335
 336   value = gtk_adjustment_get_value (adj);
 337   if (value > (gdouble) sizes[length-1])
 338     gtk_adjustment_set_value (adj, (gdouble) sizes[length-1]);
 339   else if (value < (gdouble) sizes[0])
 340     gtk_adjustment_set_value (adj, (gdouble) sizes[0]);
 341
 342   for (i = 0; i < length; i++)
 343     gtk_scale_add_mark (GTK_SCALE (size_slider),
 344                         (gdouble) sizes[i],
 345                         GTK_POS_BOTTOM, NULL);
 346 }
 347
 348 static void
 349 row_activated_cb (GtkTreeView       *view,
 350                   GtkTreePath       *path,
 351                   GtkTreeViewColumn *column,
 352                   gpointer           user_data)
 353 {
 354   GtkFontChooserWidget *fontchooser = user_data;
 355   gchar *fontname;
 356
 357   fontname = gtk_font_chooser_widget_get_font (fontchooser);
 358   _gtk_font_chooser_font_activated (GTK_FONT_CHOOSER (fontchooser), fontname);
 359   g_free (fontname);
 360 }
 361
 362 static void
 363 cursor_changed_cb (GtkTreeView *treeview,
 364                    gpointer     user_data)
 365 {
 366   GtkFontChooserWidget *fontchooser = user_data;
 367   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 368   PangoFontFamily      *family;
 369   PangoFontFace        *face;
 370   PangoFontDescription *desc;
 371   gint *sizes;
 372   gint  i, n_sizes;
 373   GtkTreeIter  iter;
 374   GtkTreePath *path = NULL;
 375
 376   gtk_tree_view_get_cursor (treeview, &path, NULL);
 377
 378   if (!path)
 379     return;
 380
 381   if (!gtk_tree_model_get_iter (priv->filter_model, &iter, path))
 382     {
 383       gtk_tree_path_free (path);
 384       return;
 385     }
 386
 387   gtk_tree_model_filter_convert_iter_to_child_iter (GTK_TREE_MODEL_FILTER (priv->filter_model),
 388                                                     &priv->font_iter,
 389                                                     &iter);
 390   gtk_tree_model_get (priv->filter_model, &iter,
 391                       FACE_COLUMN, &face,
 392                       FAMILY_COLUMN, &family,
 393                       FONT_DESC_COLUMN, &desc,
 394                       -1);
 395
 396   gtk_tree_path_free (path);
 397   path = NULL;
 398
 399   pango_font_description_set_size (desc, pango_font_description_get_size (priv->font_desc));
 400   gtk_widget_override_font (priv->preview, desc);
 401
 402   pango_font_face_list_sizes (face, &sizes, &n_sizes);
 403   /* It seems not many fonts actually have a sane set of sizes */
 404   for (i = 0; i < n_sizes; i++)
 405     sizes[i] = sizes[i] / PANGO_SCALE;
 406
 407   set_range_marks (priv, priv->size_slider, sizes, n_sizes);
 408
 409   if (priv->family)
 410     g_object_unref (priv->family);
 411   priv->family = family;
 412
 413   if (priv->face)
 414     g_object_unref (priv->face);
 415   priv->face = face;
 416
 417   if (priv->font_desc)
 418     pango_font_description_free (priv->font_desc);
 419   priv->font_desc = desc;
 420
 421   g_object_notify (G_OBJECT (fontchooser), "font");
 422   g_object_notify (G_OBJECT (fontchooser), "font-desc");
 423 }
 424
 425 static gboolean
 426 zoom_preview_cb (GtkWidget      *scrolled_window,
 427                  GdkEventScroll *event,
 428                  gpointer        user_data)
 429 {
 430   GtkFontChooserWidget *fc = user_data;
 431   GtkFontChooserWidgetPrivate *priv = fc->priv;
 432   GtkAdjustment *adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin));
 433
 434   if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_RIGHT)
 435     gtk_adjustment_set_value (adj,
 436                               gtk_adjustment_get_value (adj) +
 437                               gtk_adjustment_get_step_increment (adj));
 438   else if (event->direction == GDK_SCROLL_DOWN || event->direction == GDK_SCROLL_LEFT)
 439     gtk_adjustment_set_value (adj,
 440                               gtk_adjustment_get_value (adj) -
 441                               gtk_adjustment_get_step_increment (adj));
 442   return TRUE;
 443 }
 444
 445 static void
 446 row_inserted_cb (GtkTreeModel *model,
 447                  GtkTreePath  *path,
 448                  GtkTreeIter  *iter,
 449                  gpointer      user_data)
 450 {
 451   GtkFontChooserWidget *fontchooser = user_data;
 452   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 453
 454   gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->list_notebook), 0);
 455 }
 456
 457 static void
 458 row_deleted_cb  (GtkTreeModel *model,
 459                  GtkTreePath  *path,
 460                  gpointer      user_data)
 461 {
 462   GtkFontChooserWidget *fontchooser = user_data;
 463   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 464
 465   if (gtk_tree_model_iter_n_children (model, NULL) == 0)
 466     gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->list_notebook), 1);
 467 }
 468
 469 static void
 470 gtk_font_chooser_widget_init (GtkFontChooserWidget *fontchooser)
 471 {
 472   GIcon *icon;
 473   GtkFontChooserWidgetPrivate *priv;
 474   GtkWidget *scrolled_win;
 475   GtkWidget *grid;
 476
 477   fontchooser->priv = G_TYPE_INSTANCE_GET_PRIVATE (fontchooser,
 478                                                    GTK_TYPE_FONT_CHOOSER_WIDGET,
 479                                                    GtkFontChooserWidgetPrivate);
 480
 481   priv = fontchooser->priv;
 482
 483   /* Default preview string  */
 484   priv->preview_text = g_strdup (pango_language_get_sample_string (NULL));
 485   priv->show_preview_entry = TRUE;
 486   priv->font_desc = pango_font_description_new ();
 487
 488   gtk_widget_push_composite_child ();
 489
 490   /* Creating fundamental widgets for the private struct */
 491   priv->search_entry = gtk_entry_new ();
 492   priv->family_face_list = gtk_tree_view_new ();
 493   priv->preview = gtk_entry_new ();
 494   priv->size_slider = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL,
 495                                                 (gdouble) font_sizes[0],
 496                                                 (gdouble) font_sizes[G_N_ELEMENTS (font_sizes) - 1],
 497                                                 1.0);
 498
 499   priv->size_spin = gtk_spin_button_new_with_range (0.0, (gdouble)(G_MAXINT / PANGO_SCALE), 1.0);
 500
 501   /** Bootstrapping widget layout **/
 502   gtk_box_set_spacing (GTK_BOX (fontchooser), 6);
 503
 504   /* Main font family/face view */
 505   priv->list_scrolled_window = gtk_scrolled_window_new (NULL, NULL);
 506   scrolled_win = priv->list_scrolled_window;
 507   gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_win),
 508                                   GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 509   gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolled_win),
 510                                        GTK_SHADOW_ETCHED_IN);
 511   gtk_widget_set_size_request (scrolled_win, 400, 300);
 512   gtk_container_add (GTK_CONTAINER (scrolled_win), priv->family_face_list);
 513
 514   /* Text to display when list is empty */
 515   priv->empty_list = gtk_label_new (_(NO_FONT_MATCHED_SEARCH));
 516   gtk_widget_set_margin_top    (priv->empty_list, 12);
 517   gtk_widget_set_margin_left   (priv->empty_list, 12);
 518   gtk_widget_set_margin_right  (priv->empty_list, 12);
 519   gtk_widget_set_margin_bottom (priv->empty_list, 12);
 520   gtk_widget_set_halign (priv->empty_list, GTK_ALIGN_CENTER);
 521   gtk_widget_set_valign (priv->empty_list, GTK_ALIGN_START);
 522
 523   priv->list_notebook = gtk_notebook_new ();
 524   gtk_notebook_set_show_tabs (GTK_NOTEBOOK (priv->list_notebook), FALSE);
 525   gtk_notebook_append_page (GTK_NOTEBOOK (priv->list_notebook), scrolled_win, NULL);
 526   gtk_notebook_append_page (GTK_NOTEBOOK (priv->list_notebook), priv->empty_list, NULL);
 527
 528   /* Basic layout */
 529   grid = gtk_grid_new ();
 530
 531   gtk_grid_set_column_spacing (GTK_GRID (grid), 6);
 532   gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
 533
 534   gtk_grid_attach (GTK_GRID (grid), priv->search_entry, 0, 0, 2, 1);
 535   gtk_grid_attach (GTK_GRID (grid), priv->list_notebook, 0, 1, 2, 1);
 536   gtk_grid_attach (GTK_GRID (grid), priv->preview,      0, 2, 2, 1);
 537
 538   gtk_grid_attach (GTK_GRID (grid), priv->size_slider,  0, 3, 1, 1);
 539   gtk_grid_attach (GTK_GRID (grid), priv->size_spin,    1, 3, 1, 1);
 540
 541   gtk_widget_set_hexpand  (GTK_WIDGET (scrolled_win),      TRUE);
 542   gtk_widget_set_vexpand  (GTK_WIDGET (scrolled_win),      TRUE);
 543   gtk_widget_set_hexpand  (GTK_WIDGET (priv->search_entry), TRUE);
 544
 545   gtk_widget_set_hexpand  (GTK_WIDGET (priv->size_slider), TRUE);
 546   gtk_widget_set_hexpand  (GTK_WIDGET (priv->size_spin),   FALSE);
 547
 548   gtk_box_pack_start (GTK_BOX (fontchooser), grid, TRUE, TRUE, 0);
 549
 550   gtk_widget_show_all (GTK_WIDGET (fontchooser));
 551   gtk_widget_hide     (GTK_WIDGET (fontchooser));
 552
 553   /* Treeview column and model bootstrapping */
 554   gtk_font_chooser_widget_bootstrap_fontlist (fontchooser);
 555
 556   /* Set default preview text */
 557   gtk_entry_set_text (GTK_ENTRY (priv->preview),
 558                       pango_language_get_sample_string (NULL));
 559
 560   /* Set search icon and place holder text */
 561   icon = g_themed_icon_new_with_default_fallbacks ("edit-find-symbolic");
 562   g_object_set (G_OBJECT (priv->search_entry),
 563                 "secondary-icon-gicon", icon,
 564                 "secondary-icon-activatable", FALSE,
 565                 "secondary-icon-sensitive", FALSE,
 566                 NULL);
 567   g_object_unref (icon);
 568
 569   gtk_entry_set_placeholder_text (GTK_ENTRY (priv->search_entry), _("Search font name"));
 570
 571   /** Callback connections **/
 572   g_signal_connect (priv->search_entry, "notify::text",
 573                     G_CALLBACK (text_changed_cb), fontchooser);
 574   g_signal_connect (priv->search_entry,
 575                     "icon-press", G_CALLBACK (icon_press_cb), NULL);
 576
 577   g_signal_connect (gtk_range_get_adjustment (GTK_RANGE (priv->size_slider)),
 578                     "value-changed", G_CALLBACK (size_change_cb), fontchooser);
 579   g_signal_connect (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin)),
 580                     "value-changed", G_CALLBACK (size_change_cb), fontchooser);
 581
 582   g_signal_connect (priv->family_face_list, "cursor-changed",
 583                     G_CALLBACK (cursor_changed_cb), fontchooser);
 584   g_signal_connect (priv->family_face_list, "row-activated",
 585                     G_CALLBACK (row_activated_cb), fontchooser);
 586
 587   /* Zoom on preview scroll */
 588   g_signal_connect (priv->preview, "scroll-event",
 589                     G_CALLBACK (zoom_preview_cb), fontchooser);
 590
 591   g_signal_connect (priv->size_slider, "scroll-event",
 592                     G_CALLBACK (zoom_preview_cb), fontchooser);
 593
 594   set_range_marks (priv, priv->size_slider, (gint*)font_sizes, G_N_ELEMENTS (font_sizes));
 595
 596   /* Font list empty hides the scrolledwindow */
 597   g_signal_connect (G_OBJECT (priv->filter_model), "row-deleted",
 598                     G_CALLBACK (row_deleted_cb), fontchooser);
 599   g_signal_connect (G_OBJECT (priv->filter_model), "row-inserted",
 600                     G_CALLBACK (row_inserted_cb), fontchooser);
 601
 602   /* Set default focus */
 603   gtk_widget_pop_composite_child ();
 604
 605   gtk_font_chooser_widget_take_font_desc (fontchooser, NULL);
 606 }
 607
 608 /**
 609  * gtk_font_chooser_widget_new:
 610  *
 611  * Creates a new #GtkFontChooserWidget.
 612  *
 613  * Return value: a new #GtkFontChooserWidget
 614  *
 615  * Since: 3.2
 616  */
 617 GtkWidget *
 618 gtk_font_chooser_widget_new (void)
 619 {
 620   return g_object_new (GTK_TYPE_FONT_CHOOSER_WIDGET, NULL);
 621 }
 622
 623 static int
 624 cmp_families (const void *a,
 625               const void *b)
 626 {
 627   const char *a_name = pango_font_family_get_name (*(PangoFontFamily **)a);
 628   const char *b_name = pango_font_family_get_name (*(PangoFontFamily **)b);
 629
 630   return g_utf8_collate (a_name, b_name);
 631 }
 632
 633 static void
 634 gtk_font_chooser_widget_load_fonts (GtkFontChooserWidget *fontchooser)
 635 {
 636   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 637   GtkListStore *list_store;
 638   gint n_families, i;
 639   PangoFontFamily **families;
 640   gchar *family_and_face;
 641
 642   list_store = GTK_LIST_STORE (priv->model);
 643
 644   pango_context_list_families (gtk_widget_get_pango_context (GTK_WIDGET (fontchooser)),
 645                                &families,
 646                                &n_families);
 647
 648   qsort (families, n_families, sizeof (PangoFontFamily *), cmp_families);
 649
 650   gtk_list_store_clear (list_store);
 651   memset (&priv->font_iter, 0, sizeof (GtkTreeIter));
 652
 653   /* Iterate over families and faces */
 654   for (i = 0; i < n_families; i++)
 655     {
 656       GtkTreeIter     iter;
 657       PangoFontFace **faces;
 658       int             j, n_faces;
 659       const gchar    *fam_name = pango_font_family_get_name (families[i]);
 660
 661       pango_font_family_list_faces (families[i], &faces, &n_faces);
 662
 663       for (j = 0; j < n_faces; j++)
 664         {
 665           PangoFontDescription *pango_desc;
 666           const gchar *face_name;
 667
 668           pango_desc = pango_font_face_describe (faces[j]);
 669           face_name = pango_font_face_get_face_name (faces[j]);
 670
 671           family_and_face = g_strconcat (fam_name, " ", face_name, NULL);
 672
 673           gtk_list_store_insert_with_values (list_store, &iter, -1,
 674                                              FAMILY_COLUMN, families[i],
 675                                              FACE_COLUMN, faces[j],
 676                                              FONT_DESC_COLUMN, pango_desc,
 677                                              PREVIEW_TITLE_COLUMN, family_and_face,
 678                                              -1);
 679
 680           pango_font_description_free (pango_desc);
 681           g_free (family_and_face);
 682         }
 683
 684       g_free (faces);
 685     }
 686
 687   g_free (families);
 688 }
 689
 690 static gboolean
 691 visible_func (GtkTreeModel *model,
 692               GtkTreeIter  *iter,
 693               gpointer      user_data)
 694 {
 695   GtkFontChooserWidgetPrivate *priv = user_data;
 696   gboolean result = TRUE;
 697   const gchar *search_text;
 698   gchar **split_terms;
 699   gchar *font_name, *font_name_casefold;
 700   guint i;
 701
 702   if (priv->filter_func != NULL)
 703     {
 704       PangoFontFamily *family;
 705       PangoFontFace *face;
 706
 707       gtk_tree_model_get (model, iter,
 708                           FAMILY_COLUMN, &family,
 709                           FACE_COLUMN, &face,
 710                           -1);
 711
 712       result = priv->filter_func (family, face, priv->filter_data);
 713
 714       g_object_unref (family);
 715       g_object_unref (face);
 716
 717       if (!result)
 718         return FALSE;
 719     }
 720
 721   /* If there's no filter string we show the item */
 722   search_text = gtk_entry_get_text (GTK_ENTRY (priv->search_entry));
 723   if (strlen (search_text) == 0)
 724     return TRUE;
 725
 726   gtk_tree_model_get (model, iter,
 727                       PREVIEW_TITLE_COLUMN, &font_name,
 728                       -1);
 729
 730   if (font_name == NULL)
 731     return FALSE;
 732
 733   split_terms = g_strsplit (search_text, " ", 0);
 734   font_name_casefold = g_utf8_casefold (font_name, -1);
 735
 736   for (i = 0; split_terms[i] && result; i++)
 737     {
 738       gchar* term_casefold = g_utf8_casefold (split_terms[i], -1);
 739
 740       if (!strstr (font_name_casefold, term_casefold))
 741         result = FALSE;
 742
 743       g_free (term_casefold);
 744     }
 745
 746   g_free (font_name_casefold);
 747   g_free (font_name);
 748   g_strfreev (split_terms);
 749
 750   return result;
 751 }
 752
 753 static void
 754 gtk_font_chooser_widget_cell_data_func (GtkTreeViewColumn *column,
 755                                         GtkCellRenderer   *cell,
 756                                         GtkTreeModel      *tree_model,
 757                                         GtkTreeIter       *iter,
 758                                         gpointer           user_data)
 759 {
 760   GtkFontChooserWidget *fontchooser = user_data;
 761   PangoFontDescription *font_desc;
 762   char *to_string, *markup;
 763
 764   gtk_tree_model_get (tree_model, iter,
 765                       FONT_DESC_COLUMN, &font_desc,
 766                       -1);
 767
 768   to_string = pango_font_description_to_string (font_desc);
 769
 770   markup = g_markup_printf_escaped (ROW_FORMAT_STRING,
 771                                     to_string,
 772                                     to_string,
 773                                     fontchooser->priv->preview_text);
 774
 775   g_object_set (cell,
 776                 "markup", markup,
 777                 NULL);
 778
 779   pango_font_description_free (font_desc);
 780   g_free (to_string);
 781   g_free (markup);
 782 }
 783
 784 static void
 785 gtk_font_chooser_widget_bootstrap_fontlist (GtkFontChooserWidget *fontchooser)
 786 {
 787   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 788   GtkTreeView *treeview = GTK_TREE_VIEW (priv->family_face_list);
 789   GtkCellRenderer *cell;
 790   GtkTreeViewColumn *col;
 791
 792   priv->model = GTK_TREE_MODEL (gtk_list_store_new (4,
 793                                                     PANGO_TYPE_FONT_FAMILY,
 794                                                     PANGO_TYPE_FONT_FACE,
 795                                                     PANGO_TYPE_FONT_DESCRIPTION,
 796                                                     G_TYPE_STRING));
 797
 798   priv->filter_model = gtk_tree_model_filter_new (priv->model, NULL);
 799   g_object_unref (priv->model);
 800
 801   gtk_tree_model_filter_set_visible_func (GTK_TREE_MODEL_FILTER (priv->filter_model),
 802                                           visible_func, (gpointer)priv, NULL);
 803
 804   gtk_tree_view_set_model (treeview, priv->filter_model);
 805   g_object_unref (priv->filter_model);
 806
 807   gtk_tree_view_set_rules_hint      (treeview, TRUE);
 808   gtk_tree_view_set_headers_visible (treeview, FALSE);
 809
 810   cell = gtk_cell_renderer_text_new ();
 811   g_object_set (cell, "ellipsize", PANGO_ELLIPSIZE_END, NULL);
 812
 813   col = gtk_tree_view_column_new ();
 814   gtk_tree_view_column_set_title (col, _("Font Family"));
 815   gtk_tree_view_column_pack_start (col, cell, TRUE);
 816   gtk_tree_view_column_set_cell_data_func (col,
 817                                            cell,
 818                                            gtk_font_chooser_widget_cell_data_func,
 819                                            fontchooser,
 820                                            NULL);
 821
 822   gtk_tree_view_append_column (treeview, col);
 823
 824   gtk_font_chooser_widget_load_fonts (fontchooser);
 825 }
 826
 827 static void
 828 gtk_font_chooser_widget_finalize (GObject *object)
 829 {
 830   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);
 831   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 832
 833   if (priv->font_desc)
 834     pango_font_description_free (priv->font_desc);
 835
 836   if (priv->family)
 837     g_object_unref (priv->family);
 838
 839   if (priv->face)
 840     g_object_unref (priv->face);
 841
 842   if (priv->filter_data_destroy)
 843     priv->filter_data_destroy (priv->filter_data);
 844
 845   G_OBJECT_CLASS (gtk_font_chooser_widget_parent_class)->finalize (object);
 846 }
 847
 848 static gboolean
 849 gtk_font_chooser_widget_find_font (GtkFontChooserWidget        *fontchooser,
 850                                    const PangoFontDescription  *font_desc,
 851                                    /* out arguments */
 852                                    GtkTreeIter                 *iter,
 853                                    PangoFontFamily            **family,
 854                                    PangoFontFace              **face)
 855 {
 856   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 857   PangoFontDescription *desc;
 858   gboolean valid;
 859
 860   for (valid = gtk_tree_model_get_iter_first (priv->model, iter);
 861        valid;
 862        valid = gtk_tree_model_iter_next (priv->model, iter))
 863     {
 864       gtk_tree_model_get (priv->model, iter,
 865                           FACE_COLUMN, face,
 866                           FAMILY_COLUMN, family,
 867                           FONT_DESC_COLUMN, &desc,
 868                           -1);
 869
 870       pango_font_description_merge_static (desc, font_desc, FALSE);
 871       if (pango_font_description_equal (desc, font_desc))
 872         break;
 873
 874       g_object_unref (face);
 875       g_object_unref (family);
 876       pango_font_description_free (desc);
 877     }
 878
 879   return valid;
 880 }
 881
 882 static void
 883 gtk_font_chooser_widget_screen_changed (GtkWidget *widget,
 884                                         GdkScreen *previous_screen)
 885 {
 886   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (widget);
 887
 888   if (GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->screen_changed)
 889     GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->screen_changed (widget, previous_screen);
 890
 891   if (previous_screen == NULL)
 892     previous_screen = gdk_screen_get_default ();
 893
 894   if (previous_screen == gtk_widget_get_screen (widget))
 895     return;
 896
 897   gtk_font_chooser_widget_load_fonts (fontchooser);
 898
 899   gtk_font_chooser_widget_select_font (fontchooser);
 900 }
 901
 902 static PangoFontFamily *
 903 gtk_font_chooser_widget_get_family (GtkFontChooser *chooser)
 904 {
 905   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
 906
 907   return fontchooser->priv->family;
 908 }
 909
 910 static PangoFontFace *
 911 gtk_font_chooser_widget_get_face (GtkFontChooser *chooser)
 912 {
 913   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
 914
 915   return fontchooser->priv->face;
 916 }
 917
 918 static gint
 919 gtk_font_chooser_widget_get_size (GtkFontChooser *chooser)
 920 {
 921   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
 922
 923   return pango_font_description_get_size (fontchooser->priv->font_desc);
 924 }
 925
 926 static gchar *
 927 gtk_font_chooser_widget_get_font (GtkFontChooserWidget *fontchooser)
 928 {
 929   return pango_font_description_to_string (fontchooser->priv->font_desc);
 930 }
 931
 932 static PangoFontDescription *
 933 gtk_font_chooser_widget_get_font_desc (GtkFontChooserWidget *fontchooser)
 934 {
 935   return fontchooser->priv->font_desc;
 936 }
 937
 938 static void
 939 gtk_font_chooser_widget_set_font (GtkFontChooserWidget *fontchooser,
 940                                   const gchar          *fontname)
 941 {
 942   PangoFontDescription *font_desc;
 943
 944   font_desc = pango_font_description_from_string (fontname);
 945   gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc);
 946 }
 947
 948 static void
 949 gtk_font_chooser_widget_take_font_desc (GtkFontChooserWidget *fontchooser,
 950                                         PangoFontDescription *font_desc)
 951 {
 952   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 953   PangoFontMask mask;
 954
 955   if (font_desc && priv->font_desc &&
 956       pango_font_description_equal (font_desc, priv->font_desc))
 957     {
 958       pango_font_description_free (font_desc);
 959       return;
 960     }
 961
 962   if (font_desc == NULL)
 963     font_desc = pango_font_description_from_string (GTK_FONT_CHOOSER_DEFAULT_FONT_NAME);
 964
 965   pango_font_description_merge (priv->font_desc, font_desc, TRUE);
 966
 967   mask = pango_font_description_get_set_fields (font_desc);
 968
 969   if (mask & PANGO_FONT_MASK_SIZE)
 970     {
 971       double font_size = (double) pango_font_description_get_size (priv->font_desc) / PANGO_SCALE;
 972       /* XXX: This clamps, which can cause it to reloop into here, do we need
 973        * to block its signal handler? */
 974       gtk_range_set_value (GTK_RANGE (priv->size_slider), font_size);
 975       gtk_spin_button_set_value (GTK_SPIN_BUTTON (priv->size_spin), font_size);
 976     }
 977   if (mask & (PANGO_FONT_MASK_FAMILY | PANGO_FONT_MASK_STYLE | PANGO_FONT_MASK_VARIANT |
 978               PANGO_FONT_MASK_WEIGHT | PANGO_FONT_MASK_STRETCH))
 979     gtk_font_chooser_widget_select_font (fontchooser);
 980
 981   gtk_widget_override_font (priv->preview, priv->font_desc);
 982
 983   pango_font_description_free (font_desc); /* adopted */
 984
 985   g_object_notify (G_OBJECT (fontchooser), "font");
 986   g_object_notify (G_OBJECT (fontchooser), "font-desc");
 987 }
 988
 989 static void
 990 gtk_font_chooser_widget_select_font (GtkFontChooserWidget *fontchooser)
 991 {
 992   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
 993   GtkTreeIter iter;
 994
 995   if (priv->family)
 996     g_object_unref (priv->family);
 997   if (priv->face)
 998     g_object_unref (priv->face);
 999
1000   if (gtk_font_chooser_widget_find_font (fontchooser,
1001                                          priv->font_desc,
1002                                          &priv->font_iter,
1003                                          &priv->family,
1004                                          &priv->face))
1005     {
1006       GtkTreeIter filter_iter;
1007
1008       if (gtk_tree_model_filter_convert_child_iter_to_iter (GTK_TREE_MODEL_FILTER (priv->filter_model),
1009                                                             &filter_iter,
1010                                                             &iter))
1011         {
1012           GtkTreePath *path = gtk_tree_model_get_path (priv->filter_model, &filter_iter);
1013           gtk_tree_view_set_cursor (GTK_TREE_VIEW (priv->family_face_list),
1014                                     path,
1015                                     NULL,
1016                                     FALSE);
1017           gtk_tree_path_free (path);
1018         }
1019     }
1020   else
1021     {
1022       gtk_tree_selection_unselect_all
1023         (gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->family_face_list)));
1024       priv->face = NULL;
1025       priv->family = NULL;
1026       memset (&priv->font_iter, 0, sizeof (GtkTreeIter));
1027     }
1028 }
1029
1030 static const gchar*
1031 gtk_font_chooser_widget_get_preview_text (GtkFontChooserWidget *fontchooser)
1032 {
1033   return fontchooser->priv->preview_text;
1034 }
1035
1036 static void
1037 gtk_font_chooser_widget_set_preview_text (GtkFontChooserWidget *fontchooser,
1038                                           const gchar          *text)
1039 {
1040   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1041
1042   g_free (priv->preview_text);
1043   priv->preview_text = g_strdup (text);
1044
1045   gtk_entry_set_text (GTK_ENTRY (priv->preview), text);
1046
1047   g_object_notify (G_OBJECT (fontchooser), "preview-text");
1048
1049   /* XXX: There's no API to tell the treeview that a column has changed,
1050    * so we just */
1051   gtk_widget_queue_draw (priv->family_face_list);
1052 }
1053
1054 static gboolean
1055 gtk_font_chooser_widget_get_show_preview_entry (GtkFontChooserWidget *fontchooser)
1056 {
1057   return fontchooser->priv->show_preview_entry;
1058 }
1059
1060 static void
1061 gtk_font_chooser_widget_set_show_preview_entry (GtkFontChooserWidget *fontchooser,
1062                                                 gboolean              show_preview_entry)
1063 {
1064   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1065
1066   if (priv->show_preview_entry != show_preview_entry)
1067     {
1068       fontchooser->priv->show_preview_entry = show_preview_entry;
1069
1070       if (show_preview_entry)
1071         gtk_widget_show (fontchooser->priv->preview);
1072       else
1073         gtk_widget_hide (fontchooser->priv->preview);
1074
1075       g_object_notify (G_OBJECT (fontchooser), "show-preview-entry");
1076     }
1077 }
1078
1079 static void
1080 gtk_font_chooser_widget_set_filter_func (GtkFontChooser  *chooser,
1081                                          GtkFontFilterFunc filter,
1082                                          gpointer          data,
1083                                          GDestroyNotify    destroy)
1084 {
1085   GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
1086   GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1087
1088   if (priv->filter_data_destroy)
1089     priv->filter_data_destroy (priv->filter_data);
1090
1091   priv->filter_func = filter;
1092   priv->filter_data = data;
1093   priv->filter_data_destroy = destroy;
1094
1095   gtk_tree_model_filter_refilter (GTK_TREE_MODEL_FILTER (priv->filter_model));
1096 }
1097
1098 static void
1099 gtk_font_chooser_widget_iface_init (GtkFontChooserIface *iface)
1100 {
1101   iface->get_font_family = gtk_font_chooser_widget_get_family;
1102   iface->get_font_face = gtk_font_chooser_widget_get_face;
1103   iface->get_font_size = gtk_font_chooser_widget_get_size;
1104   iface->set_filter_func = gtk_font_chooser_widget_set_filter_func;
1105 }