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