gtkfontchooserwidget.c 39.7 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14
/* GTK - The GIMP Toolkit
 * Copyright (C) 2011 Alberto Ruiz <aruiz@gnome.org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
Javier Jardón's avatar
Javier Jardón committed
15
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
16 17 18 19 20 21 22 23 24 25 26
 */

#include "config.h"

#include <stdlib.h>
#include <glib/gprintf.h>
#include <string.h>

#include <atk/atk.h>

#include "gtkfontchooserwidget.h"
27 28 29 30

#include "gtkadjustment.h"
#include "gtkbuildable.h"
#include "gtkbox.h"
31 32
#include "gtkcellrenderertext.h"
#include "gtkentry.h"
Matthias Clasen's avatar
Matthias Clasen committed
33
#include "gtksearchentry.h"
34 35 36 37
#include "gtkgrid.h"
#include "gtkfontchooser.h"
#include "gtkfontchooserutils.h"
#include "gtkintl.h"
38 39
#include "gtklabel.h"
#include "gtkliststore.h"
40
#include "gtknotebook.h"
41 42
#include "gtkprivate.h"
#include "gtkscale.h"
43
#include "gtkscrolledwindow.h"
44
#include "gtkspinbutton.h"
45 46 47
#include "gtktextview.h"
#include "gtktreeselection.h"
#include "gtktreeview.h"
48 49 50
#include "gtkwidget.h"

/**
51
 * SECTION:gtkfontchooserwidget
52 53
 * @Short_description: A widget for selecting fonts
 * @Title: GtkFontChooserWidget
54
 * @See_also: #GtkFontChooserDialog
55
 *
Matthias Clasen's avatar
Matthias Clasen committed
56 57
 * The #GtkFontChooserWidget widget lists the available fonts,
 * styles and sizes, allowing the user to select a font. It is
58
 * used in the #GtkFontChooserDialog widget to provide a
Matthias Clasen's avatar
Matthias Clasen committed
59
 * dialog box for selecting fonts.
60 61
 *
 * To set the font which is initially selected, use
62
 * gtk_font_chooser_set_font() or gtk_font_chooser_set_font_desc().
63
 *
64 65
 * To get the selected font use gtk_font_chooser_get_font() or
 * gtk_font_chooser_get_font_desc().
66 67
 *
 * To change the text which is shown in the preview area, use
68
 * gtk_font_chooser_set_preview_text().
69 70 71 72 73 74 75 76 77
 *
 * Since: 3.2
 */


struct _GtkFontChooserWidgetPrivate
{
  GtkWidget    *search_entry;
  GtkWidget    *family_face_list;
78
  GtkTreeViewColumn *family_face_column;
79
  GtkCellRenderer *family_face_cell;
80 81
  GtkWidget    *list_scrolled_window;
  GtkWidget    *list_notebook;
82
  GtkTreeModel *model;
83 84 85 86 87 88 89 90 91
  GtkTreeModel *filter_model;

  GtkWidget       *preview;
  gchar           *preview_text;
  gboolean         show_preview_entry;

  GtkWidget *size_spin;
  GtkWidget *size_slider;

92
  PangoFontDescription *font_desc;
93 94
  GtkTreeIter           font_iter;      /* invalid if font not available or pointer into model
                                           (not filter_model) to the row containing font */
95 96 97 98 99 100 101 102 103 104 105 106 107 108 109
  GtkFontFilterFunc filter_func;
  gpointer          filter_data;
  GDestroyNotify    filter_data_destroy;
};

/* This is the initial fixed height and the top padding of the preview entry */
#define PREVIEW_HEIGHT 72
#define PREVIEW_TOP_PADDING 6

/* These are the sizes of the font, style & size lists. */
#define FONT_LIST_HEIGHT  136
#define FONT_LIST_WIDTH   190
#define FONT_STYLE_LIST_WIDTH 170
#define FONT_SIZE_LIST_WIDTH  60

110
/* Keep in line with GtkTreeStore defined in gtkfontchooserwidget.ui */
111 112 113
enum {
  FAMILY_COLUMN,
  FACE_COLUMN,
114
  FONT_DESC_COLUMN,
115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130
  PREVIEW_TITLE_COLUMN
};

static void gtk_font_chooser_widget_set_property         (GObject         *object,
                                                          guint            prop_id,
                                                          const GValue    *value,
                                                          GParamSpec      *pspec);
static void gtk_font_chooser_widget_get_property         (GObject         *object,
                                                          guint            prop_id,
                                                          GValue          *value,
                                                          GParamSpec      *pspec);
static void gtk_font_chooser_widget_finalize             (GObject         *object);

static void gtk_font_chooser_widget_screen_changed       (GtkWidget       *widget,
                                                          GdkScreen       *previous_screen);

131 132 133 134
static gboolean gtk_font_chooser_widget_find_font        (GtkFontChooserWidget *fontchooser,
                                                          const PangoFontDescription *font_desc,
                                                          GtkTreeIter          *iter);
static void     gtk_font_chooser_widget_ensure_selection (GtkFontChooserWidget *fontchooser);
135

136 137 138
static gchar   *gtk_font_chooser_widget_get_font         (GtkFontChooserWidget *fontchooser);
static void     gtk_font_chooser_widget_set_font         (GtkFontChooserWidget *fontchooser,
                                                          const gchar          *fontname);
139

140
static PangoFontDescription *gtk_font_chooser_widget_get_font_desc  (GtkFontChooserWidget *fontchooser);
141 142 143
static void                  gtk_font_chooser_widget_merge_font_desc(GtkFontChooserWidget *fontchooser,
                                                                     PangoFontDescription *font_desc,
                                                                     GtkTreeIter          *iter);
144
static void                  gtk_font_chooser_widget_take_font_desc (GtkFontChooserWidget *fontchooser,
145 146 147
                                                                     PangoFontDescription *font_desc);


148 149 150 151 152 153 154 155
static const gchar *gtk_font_chooser_widget_get_preview_text (GtkFontChooserWidget *fontchooser);
static void         gtk_font_chooser_widget_set_preview_text (GtkFontChooserWidget *fontchooser,
                                                              const gchar          *text);

static gboolean gtk_font_chooser_widget_get_show_preview_entry (GtkFontChooserWidget *fontchooser);
static void     gtk_font_chooser_widget_set_show_preview_entry (GtkFontChooserWidget *fontchooser,
                                                                gboolean              show_preview_entry);

156 157 158 159 160 161 162 163 164 165 166
static void     gtk_font_chooser_widget_set_cell_size          (GtkFontChooserWidget *fontchooser);
static void     gtk_font_chooser_widget_load_fonts             (GtkFontChooserWidget *fontchooser);
static gboolean visible_func                                   (GtkTreeModel *model,
								GtkTreeIter  *iter,
								gpointer      user_data);
static void     gtk_font_chooser_widget_cell_data_func         (GtkTreeViewColumn *column,
								GtkCellRenderer   *cell,
								GtkTreeModel      *tree_model,
								GtkTreeIter       *iter,
								gpointer           user_data);

167 168 169
static void gtk_font_chooser_widget_iface_init (GtkFontChooserIface *iface);

G_DEFINE_TYPE_WITH_CODE (GtkFontChooserWidget, gtk_font_chooser_widget, GTK_TYPE_BOX,
170
                         G_ADD_PRIVATE (GtkFontChooserWidget)
171 172 173 174 175 176 177 178 179 180 181 182 183
                         G_IMPLEMENT_INTERFACE (GTK_TYPE_FONT_CHOOSER,
                                                gtk_font_chooser_widget_iface_init))

static void
gtk_font_chooser_widget_set_property (GObject         *object,
                                      guint            prop_id,
                                      const GValue    *value,
                                      GParamSpec      *pspec)
{
  GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);

  switch (prop_id)
    {
184
    case GTK_FONT_CHOOSER_PROP_FONT:
185
      gtk_font_chooser_widget_set_font (fontchooser, g_value_get_string (value));
186
      break;
187
    case GTK_FONT_CHOOSER_PROP_FONT_DESC:
188
      gtk_font_chooser_widget_take_font_desc (fontchooser, g_value_dup_boxed (value));
189
      break;
190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211
    case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT:
      gtk_font_chooser_widget_set_preview_text (fontchooser, g_value_get_string (value));
      break;
    case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY:
      gtk_font_chooser_widget_set_show_preview_entry (fontchooser, g_value_get_boolean (value));
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}

static void
gtk_font_chooser_widget_get_property (GObject         *object,
                                      guint            prop_id,
                                      GValue          *value,
                                      GParamSpec      *pspec)
{
  GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);

  switch (prop_id)
    {
212
    case GTK_FONT_CHOOSER_PROP_FONT:
213
      g_value_take_string (value, gtk_font_chooser_widget_get_font (fontchooser));
214
      break;
215
    case GTK_FONT_CHOOSER_PROP_FONT_DESC:
216
      g_value_set_boxed (value, gtk_font_chooser_widget_get_font_desc (fontchooser));
217
      break;
218 219 220 221 222 223 224 225 226 227 228 229
    case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT:
      g_value_set_string (value, gtk_font_chooser_widget_get_preview_text (fontchooser));
      break;
    case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY:
      g_value_set_boolean (value, gtk_font_chooser_widget_get_show_preview_entry (fontchooser));
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}

230 231 232 233 234 235 236
static void
gtk_font_chooser_widget_refilter_font_list (GtkFontChooserWidget *fontchooser)
{
  gtk_tree_model_filter_refilter (GTK_TREE_MODEL_FILTER (fontchooser->priv->filter_model));
  gtk_font_chooser_widget_ensure_selection (fontchooser);
}

237
static void
Matthias Clasen's avatar
Matthias Clasen committed
238 239
text_changed_cb (GtkEntry             *entry,
                 GParamSpec           *pspec,
240 241
                 GtkFontChooserWidget *fc)
{
242
  gtk_font_chooser_widget_refilter_font_list (fc);
243 244 245
}

static void
246
size_change_cb (GtkAdjustment *adjustment,
247 248
                gpointer       user_data)
{
249 250 251
  GtkFontChooserWidget *fontchooser = user_data;
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
  PangoFontDescription *font_desc;
252
  gdouble size = gtk_adjustment_get_value (adjustment);
253

254
  font_desc = pango_font_description_new ();
255
  if (pango_font_description_get_size_is_absolute (priv->font_desc))
256
    pango_font_description_set_absolute_size (font_desc, size * PANGO_SCALE);
257
  else
258
    pango_font_description_set_size (font_desc, size * PANGO_SCALE);
259

260
  gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc);
261 262 263
}

static void
264
gtk_font_chooser_widget_update_marks (GtkFontChooserWidget *fontchooser)
265
{
266
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
267
  GtkAdjustment *adj, *spin_adj;
268 269 270
  const int *sizes;
  gint *font_sizes;
  gint i, n_sizes;
271
  gdouble value, spin_value;
272

273
  if (gtk_list_store_iter_is_valid (GTK_LIST_STORE (priv->model), &priv->font_iter))
274
    {
275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292
      PangoFontFace *face;

      gtk_tree_model_get (priv->model, &priv->font_iter,
                          FACE_COLUMN, &face,
                          -1);

      pango_font_face_list_sizes (face, &font_sizes, &n_sizes);

      /* It seems not many fonts actually have a sane set of sizes */
      for (i = 0; i < n_sizes; i++)
        font_sizes[i] = font_sizes[i] / PANGO_SCALE;

      g_object_unref (face);
    }
  else
    {
      font_sizes = NULL;
      n_sizes = 0;
293 294
    }

295 296 297 298 299
  if (n_sizes < 2)
    {
      static const gint fallback_sizes[] = {
        6, 8, 9, 10, 11, 12, 13, 14, 16, 20, 24, 36, 48, 72
      };
300

301 302 303 304 305 306 307 308 309
      sizes = fallback_sizes;
      n_sizes = G_N_ELEMENTS (fallback_sizes);
    }
  else
    {
      sizes = font_sizes;
    }

  gtk_scale_clear_marks (GTK_SCALE (priv->size_slider));
310

311 312 313 314 315 316 317 318 319 320
  adj        = gtk_range_get_adjustment (GTK_RANGE (priv->size_slider));
  spin_adj   = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin));
  spin_value = gtk_adjustment_get_value (spin_adj);

  if (spin_value < sizes[0])
    value = (gdouble) sizes[0];
  else if (spin_value > sizes[n_sizes - 1])
    value = (gdouble)sizes[n_sizes - 1];
  else
    value = (gdouble)spin_value;
321

322 323 324
  /* ensure clamping doesn't callback into font resizing code */
  g_signal_handlers_block_by_func (adj, size_change_cb, fontchooser);
  gtk_adjustment_configure (adj,
325
                            value,
326 327 328 329 330 331 332 333 334 335 336 337 338
                            sizes[0],
                            sizes[n_sizes - 1],
                            gtk_adjustment_get_step_increment (adj),
                            gtk_adjustment_get_page_increment (adj),
                            gtk_adjustment_get_page_size (adj));
  g_signal_handlers_unblock_by_func (adj, size_change_cb, fontchooser);

  for (i = 0; i < n_sizes; i++)
    {
      gtk_scale_add_mark (GTK_SCALE (priv->size_slider),
                          sizes[i],
                          GTK_POS_BOTTOM, NULL);
    }
339

340
  g_free (font_sizes);
341 342 343 344 345 346 347 348
}

static void
row_activated_cb (GtkTreeView       *view,
                  GtkTreePath       *path,
                  GtkTreeViewColumn *column,
                  gpointer           user_data)
{
349
  GtkFontChooserWidget *fontchooser = user_data;
350 351
  gchar *fontname;

352 353
  fontname = gtk_font_chooser_widget_get_font (fontchooser);
  _gtk_font_chooser_font_activated (GTK_FONT_CHOOSER (fontchooser), fontname);
354 355 356
  g_free (fontname);
}

357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392
static PangoFontDescription *
tree_model_get_font_description (GtkTreeModel *model,
                                 GtkTreeIter  *iter)
{
  PangoFontDescription *desc;
  PangoFontFace *face;
  GtkTreeIter child_iter;

  gtk_tree_model_get (model, iter,
                      FONT_DESC_COLUMN, &desc,
                      -1);
  if (desc != NULL)
    return desc;

  gtk_tree_model_get (model, iter,
                      FACE_COLUMN, &face,
                      -1);
  desc = pango_font_face_describe (face);
  g_object_unref (face);
  
  if (GTK_IS_TREE_MODEL_FILTER (model))
    {
      gtk_tree_model_filter_convert_iter_to_child_iter (GTK_TREE_MODEL_FILTER (model),
                                                        &child_iter,
                                                        iter);
      iter = &child_iter;
      model = gtk_tree_model_filter_get_model (GTK_TREE_MODEL_FILTER (model));
    }

  gtk_list_store_set (GTK_LIST_STORE (model), iter,
                      FONT_DESC_COLUMN, desc,
                      -1);

  return desc;
}

393 394 395 396
static void
cursor_changed_cb (GtkTreeView *treeview,
                   gpointer     user_data)
{
397
  GtkFontChooserWidget *fontchooser = user_data;
398 399
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
  PangoFontDescription *desc;
400
  GtkTreeIter filter_iter, iter;
Benjamin Otte's avatar
Benjamin Otte committed
401
  GtkTreePath *path = NULL;
402 403 404 405 406 407

  gtk_tree_view_get_cursor (treeview, &path, NULL);

  if (!path)
    return;

408
  if (!gtk_tree_model_get_iter (priv->filter_model, &filter_iter, path))
409 410 411 412 413 414 415
    {
      gtk_tree_path_free (path);
      return;
    }

  gtk_tree_path_free (path);

416 417 418
  gtk_tree_model_filter_convert_iter_to_child_iter (GTK_TREE_MODEL_FILTER (priv->filter_model),
                                                    &iter,
                                                    &filter_iter);
419
  desc = tree_model_get_font_description (priv->model, &iter);
420

421
  gtk_font_chooser_widget_merge_font_desc (fontchooser, desc, &iter);
422 423 424
}

static gboolean
425 426 427
resize_by_scroll_cb (GtkWidget      *scrolled_window,
                     GdkEventScroll *event,
                     gpointer        user_data)
428
{
429 430
  GtkFontChooserWidget *fc = user_data;
  GtkFontChooserWidgetPrivate *priv = fc->priv;
431 432 433 434 435 436 437 438 439 440
  GtkAdjustment *adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin));

  if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_RIGHT)
    gtk_adjustment_set_value (adj,
                              gtk_adjustment_get_value (adj) +
                              gtk_adjustment_get_step_increment (adj));
  else if (event->direction == GDK_SCROLL_DOWN || event->direction == GDK_SCROLL_LEFT)
    gtk_adjustment_set_value (adj,
                              gtk_adjustment_get_value (adj) -
                              gtk_adjustment_get_step_increment (adj));
441 442 443 444 445 446 447 448 449
  else if (event->direction == GDK_SCROLL_SMOOTH && event->delta_x != 0.0)
    gtk_adjustment_set_value (adj,
                              gtk_adjustment_get_value (adj) +
                              gtk_adjustment_get_step_increment (adj) * event->delta_x);
  else if (event->direction == GDK_SCROLL_SMOOTH && event->delta_y != 0.0)
    gtk_adjustment_set_value (adj,
                              gtk_adjustment_get_value (adj) -
                              gtk_adjustment_get_step_increment (adj) * event->delta_y);

450 451 452 453 454 455 456 457 458
  return TRUE;
}

static void
row_inserted_cb (GtkTreeModel *model,
                 GtkTreePath  *path,
                 GtkTreeIter  *iter,
                 gpointer      user_data)
{
459 460
  GtkFontChooserWidget *fontchooser = user_data;
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
461 462 463 464 465 466 467 468 469

  gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->list_notebook), 0);
}

static void
row_deleted_cb  (GtkTreeModel *model,
                 GtkTreePath  *path,
                 gpointer      user_data)
{
470 471
  GtkFontChooserWidget *fontchooser = user_data;
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
472 473 474 475 476

  if (gtk_tree_model_iter_n_children (model, NULL) == 0)
    gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->list_notebook), 1);
}

477 478 479 480 481 482 483 484 485 486 487 488 489 490
static void
gtk_font_chooser_widget_class_init (GtkFontChooserWidgetClass *klass)
{
  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);

  widget_class->screen_changed = gtk_font_chooser_widget_screen_changed;

  gobject_class->finalize = gtk_font_chooser_widget_finalize;
  gobject_class->set_property = gtk_font_chooser_widget_set_property;
  gobject_class->get_property = gtk_font_chooser_widget_get_property;

  _gtk_font_chooser_install_properties (gobject_class);

491
  /* Bind class to template */
492
  gtk_widget_class_set_template_from_resource (widget_class,
493
					       "/org/gtk/libgtk/ui/gtkfontchooserwidget.ui");
494

495 496 497 498 499 500 501 502 503 504 505
  gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, search_entry);
  gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, family_face_list);
  gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, family_face_column);
  gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, family_face_cell);
  gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, list_scrolled_window);
  gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, list_notebook);
  gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, model);
  gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, filter_model);
  gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, preview);
  gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, size_spin);
  gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, size_slider);
506 507 508 509 510 511 512 513 514 515

  gtk_widget_class_bind_template_callback (widget_class, text_changed_cb);
  gtk_widget_class_bind_template_callback (widget_class, cursor_changed_cb);
  gtk_widget_class_bind_template_callback (widget_class, row_activated_cb);
  gtk_widget_class_bind_template_callback (widget_class, gtk_font_chooser_widget_set_cell_size);
  gtk_widget_class_bind_template_callback (widget_class, resize_by_scroll_cb);
  gtk_widget_class_bind_template_callback (widget_class, row_deleted_cb);
  gtk_widget_class_bind_template_callback (widget_class, row_inserted_cb);
  gtk_widget_class_bind_template_callback (widget_class, row_deleted_cb);
  gtk_widget_class_bind_template_callback (widget_class, size_change_cb);
516 517
}

518 519 520
static void
gtk_font_chooser_widget_init (GtkFontChooserWidget *fontchooser)
{
521
  GtkFontChooserWidgetPrivate *priv;
522

523
  fontchooser->priv = gtk_font_chooser_widget_get_instance_private (fontchooser);
524 525
  priv = fontchooser->priv;

526 527
  gtk_widget_init_template (GTK_WIDGET (fontchooser));

528 529 530
  /* Default preview string  */
  priv->preview_text = g_strdup (pango_language_get_sample_string (NULL));
  priv->show_preview_entry = TRUE;
531
  priv->font_desc = pango_font_description_new ();
532 533 534 535

  /* Set default preview text */
  gtk_entry_set_text (GTK_ENTRY (priv->preview),
                      pango_language_get_sample_string (NULL));
536
  gtk_widget_add_events (priv->preview, GDK_SCROLL_MASK);
537

538 539
  /* Set the upper values of the spin/scale with G_MAXINT / PANGO_SCALE */
  gtk_spin_button_set_range (GTK_SPIN_BUTTON (priv->size_spin),
540
			     1.0, (gdouble)(G_MAXINT / PANGO_SCALE));
541 542
  gtk_adjustment_set_upper (gtk_range_get_adjustment (GTK_RANGE (priv->size_slider)),
			    (gdouble)(G_MAXINT / PANGO_SCALE));
543

544 545 546
  /* Setup treeview/model auxilary functions */
  gtk_tree_model_filter_set_visible_func (GTK_TREE_MODEL_FILTER (priv->filter_model),
                                          visible_func, (gpointer)priv, NULL);
547

548 549 550 551 552
  gtk_tree_view_column_set_cell_data_func (priv->family_face_column,
                                           priv->family_face_cell,
                                           gtk_font_chooser_widget_cell_data_func,
                                           fontchooser,
                                           NULL);
553

554 555 556
  /* Load data and set initial style dependant parameters */
  gtk_font_chooser_widget_load_fonts (fontchooser);
  gtk_font_chooser_widget_set_cell_size (fontchooser);
557

558
  gtk_font_chooser_widget_take_font_desc (fontchooser, NULL);
559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586
}

/**
 * gtk_font_chooser_widget_new:
 *
 * Creates a new #GtkFontChooserWidget.
 *
 * Return value: a new #GtkFontChooserWidget
 *
 * Since: 3.2
 */
GtkWidget *
gtk_font_chooser_widget_new (void)
{
  return g_object_new (GTK_TYPE_FONT_CHOOSER_WIDGET, NULL);
}

static int
cmp_families (const void *a,
              const void *b)
{
  const char *a_name = pango_font_family_get_name (*(PangoFontFamily **)a);
  const char *b_name = pango_font_family_get_name (*(PangoFontFamily **)b);

  return g_utf8_collate (a_name, b_name);
}

static void
587
gtk_font_chooser_widget_load_fonts (GtkFontChooserWidget *fontchooser)
588 589
{
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
590
  GtkListStore *list_store;
591 592 593 594
  gint n_families, i;
  PangoFontFamily **families;
  gchar *family_and_face;

595 596 597
  list_store = GTK_LIST_STORE (priv->model);

  pango_context_list_families (gtk_widget_get_pango_context (GTK_WIDGET (fontchooser)),
598 599 600 601 602
                               &families,
                               &n_families);

  qsort (families, n_families, sizeof (PangoFontFamily *), cmp_families);

603
  gtk_list_store_clear (list_store);
604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622

  /* Iterate over families and faces */
  for (i = 0; i < n_families; i++)
    {
      GtkTreeIter     iter;
      PangoFontFace **faces;
      int             j, n_faces;
      const gchar    *fam_name = pango_font_family_get_name (families[i]);

      pango_font_family_list_faces (families[i], &faces, &n_faces);

      for (j = 0; j < n_faces; j++)
        {
          const gchar *face_name;

          face_name = pango_font_face_get_face_name (faces[j]);

          family_and_face = g_strconcat (fam_name, " ", face_name, NULL);

623
          gtk_list_store_insert_with_values (list_store, &iter, -1,
624 625 626 627
                                             FAMILY_COLUMN, families[i],
                                             FACE_COLUMN, faces[j],
                                             PREVIEW_TITLE_COLUMN, family_and_face,
                                             -1);
628 629 630 631 632 633 634 635

          g_free (family_and_face);
        }

      g_free (faces);
    }

  g_free (families);
636 637 638 639 640 641 642 643

  /* now make sure the font list looks right */
  if (!gtk_font_chooser_widget_find_font (fontchooser,
                                          priv->font_desc,
                                          &priv->font_iter))
    memset (&priv->font_iter, 0, sizeof (GtkTreeIter));

  gtk_font_chooser_widget_ensure_selection (fontchooser);
644 645 646 647 648 649 650
}

static gboolean
visible_func (GtkTreeModel *model,
              GtkTreeIter  *iter,
              gpointer      user_data)
{
651
  GtkFontChooserWidgetPrivate *priv = user_data;
652
  gboolean result = TRUE;
653 654
  const gchar *search_text;
  gchar **split_terms;
655
  gchar *font_name, *font_name_casefold;
656
  guint i;
657

658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676
  if (priv->filter_func != NULL)
    {
      PangoFontFamily *family;
      PangoFontFace *face;

      gtk_tree_model_get (model, iter,
                          FAMILY_COLUMN, &family,
                          FACE_COLUMN, &face,
                          -1);

      result = priv->filter_func (family, face, priv->filter_data);

      g_object_unref (family);
      g_object_unref (face);
      
      if (!result)
        return FALSE;
    }

677
  /* If there's no filter string we show the item */
678
  search_text = gtk_entry_get_text (GTK_ENTRY (priv->search_entry));
679 680 681 682 683 684 685 686 687 688 689
  if (strlen (search_text) == 0)
    return TRUE;

  gtk_tree_model_get (model, iter,
                      PREVIEW_TITLE_COLUMN, &font_name,
                      -1);

  if (font_name == NULL)
    return FALSE;

  split_terms = g_strsplit (search_text, " ", 0);
690
  font_name_casefold = g_utf8_casefold (font_name, -1);
691

692 693 694
  for (i = 0; split_terms[i] && result; i++)
    {
      gchar* term_casefold = g_utf8_casefold (split_terms[i], -1);
695

696 697
      if (!strstr (font_name_casefold, term_casefold))
        result = FALSE;
698

699 700
      g_free (term_casefold);
    }
701

702
  g_free (font_name_casefold);
703 704 705 706 707 708
  g_free (font_name);
  g_strfreev (split_terms);

  return result;
}

709 710 711 712 713 714 715 716 717 718 719 720 721
/* in pango units */
static int
gtk_font_chooser_widget_get_preview_text_height (GtkFontChooserWidget *fontchooser)
{
  GtkWidget *treeview = fontchooser->priv->family_face_list;
  double dpi, font_size;

  dpi = gdk_screen_get_resolution (gtk_widget_get_screen (treeview));
  gtk_style_context_get (gtk_widget_get_style_context (treeview),
                         gtk_widget_get_state_flags (treeview),
                         "font-size", &font_size,
                         NULL);

722
  return (dpi < 0.0 ? 96.0 : dpi) / 72.0 * PANGO_SCALE_X_LARGE * font_size * PANGO_SCALE;
723 724
}

725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742
static PangoAttrList *
gtk_font_chooser_widget_get_preview_attributes (GtkFontChooserWidget       *fontchooser,
                                                const PangoFontDescription *font_desc,
                                                gsize                       first_line_len)
{
  PangoAttribute *attribute;
  PangoAttrList *attrs;

  attrs = pango_attr_list_new ();

  attribute = pango_attr_weight_new (PANGO_WEIGHT_BOLD);
  attribute->end_index = first_line_len;
  pango_attr_list_insert (attrs, attribute);

  attribute = pango_attr_scale_new (PANGO_SCALE_SMALL);
  attribute->end_index = first_line_len;
  pango_attr_list_insert (attrs, attribute);

743 744 745 746 747 748
  if (font_desc)
    {
      attribute = pango_attr_font_desc_new (font_desc);
      attribute->start_index = first_line_len;
      pango_attr_list_insert (attrs, attribute);
    }
749

750 751 752 753
  attribute = pango_attr_fallback_new (FALSE);
  attribute->start_index = first_line_len;
  pango_attr_list_insert (attrs, attribute);

754 755 756 757 758 759 760
  attribute = pango_attr_size_new_absolute (gtk_font_chooser_widget_get_preview_text_height (fontchooser));
  attribute->start_index = first_line_len;
  pango_attr_list_insert (attrs, attribute);

  return attrs;
}

761 762 763 764 765 766 767 768 769
static void
gtk_font_chooser_widget_cell_data_func (GtkTreeViewColumn *column,
                                        GtkCellRenderer   *cell,
                                        GtkTreeModel      *tree_model,
                                        GtkTreeIter       *iter,
                                        gpointer           user_data)
{
  GtkFontChooserWidget *fontchooser = user_data;
  PangoFontDescription *font_desc;
770 771
  PangoAttrList *attrs;
  char *to_string, *text;
772
  gsize first_line_len;
773

774
  font_desc = tree_model_get_font_description (tree_model, iter);
775 776

  to_string = pango_font_description_to_string (font_desc);
777 778

  text = g_strconcat (to_string, "\n", fontchooser->priv->preview_text, NULL);
779
  first_line_len = strlen (to_string) + 1;
780
  
781 782 783
  attrs = gtk_font_chooser_widget_get_preview_attributes (fontchooser, 
                                                          font_desc,
                                                          first_line_len);
784 785

  g_object_set (cell,
786 787
                "attributes", attrs,
                "text", text,
788 789 790
                NULL);

  pango_font_description_free (font_desc);
791
  pango_attr_list_unref (attrs);
792
  g_free (to_string);
793
  g_free (text);
794 795
}

796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822
static void
gtk_font_chooser_widget_set_cell_size (GtkFontChooserWidget *fontchooser)
{
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
  PangoAttrList *attrs;
  GtkRequisition size;

  gtk_cell_renderer_set_fixed_size (priv->family_face_cell, -1, -1);

  attrs = gtk_font_chooser_widget_get_preview_attributes (fontchooser, 
                                                          NULL,
                                                          1);
  
  g_object_set (priv->family_face_cell,
                "attributes", attrs,
                "text", "x\nx",
                NULL);

  pango_attr_list_unref (attrs);

  gtk_cell_renderer_get_preferred_size (priv->family_face_cell,
                                        priv->family_face_list,
                                        &size,
                                        NULL);
  gtk_cell_renderer_set_fixed_size (priv->family_face_cell, size.width, size.height);
}

823 824 825 826 827 828
static void
gtk_font_chooser_widget_finalize (GObject *object)
{
  GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;

829 830
  if (priv->font_desc)
    pango_font_description_free (priv->font_desc);
831 832 833 834 835 836 837

  if (priv->filter_data_destroy)
    priv->filter_data_destroy (priv->filter_data);

  G_OBJECT_CLASS (gtk_font_chooser_widget_parent_class)->finalize (object);
}

838 839 840 841 842 843 844
static gboolean
my_pango_font_family_equal (const char *familya,
                            const char *familyb)
{
  return g_ascii_strcasecmp (familya, familyb) == 0;
}

845 846 847 848
static gboolean
gtk_font_chooser_widget_find_font (GtkFontChooserWidget        *fontchooser,
                                   const PangoFontDescription  *font_desc,
                                   /* out arguments */
849
                                   GtkTreeIter                 *iter)
850 851 852
{
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
  PangoFontDescription *desc;
853
  PangoFontFamily *family;
854 855
  gboolean valid;

856 857 858
  if (pango_font_description_get_family (font_desc) == NULL)
    return FALSE;

859
  for (valid = gtk_tree_model_get_iter_first (priv->model, iter);
860
       valid;
861
       valid = gtk_tree_model_iter_next (priv->model, iter))
862
    {
863 864 865 866 867 868 869 870
      gtk_tree_model_get (priv->model, iter,
                          FAMILY_COLUMN, &family,
                          -1);

      if (!my_pango_font_family_equal (pango_font_description_get_family (font_desc),
                                       pango_font_family_get_name (family)))
        continue;

871
      desc = tree_model_get_font_description (priv->model, iter);
872 873 874 875 876 877 878 879 880 881 882

      pango_font_description_merge_static (desc, font_desc, FALSE);
      if (pango_font_description_equal (desc, font_desc))
        break;

      pango_font_description_free (desc);
    }
  
  return valid;
}

883 884
static void
gtk_font_chooser_widget_screen_changed (GtkWidget *widget,
885
                                        GdkScreen *previous_screen)
886 887
{
  GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (widget);
888

889 890
  if (GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->screen_changed)
    GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->screen_changed (widget, previous_screen);
891

892 893 894 895 896 897
  if (previous_screen == NULL)
    previous_screen = gdk_screen_get_default ();

  if (previous_screen == gtk_widget_get_screen (widget))
    return;

898
  gtk_font_chooser_widget_load_fonts (fontchooser);
899 900 901 902 903 904
}

static PangoFontFamily *
gtk_font_chooser_widget_get_family (GtkFontChooser *chooser)
{
  GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
905 906 907 908 909 910 911 912 913 914
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
  PangoFontFamily *family;

  if (!gtk_list_store_iter_is_valid (GTK_LIST_STORE (priv->model), &priv->font_iter))
    return NULL;

  gtk_tree_model_get (priv->model, &priv->font_iter,
                      FAMILY_COLUMN, &family,
                      -1);
  g_object_unref (family);
915

916
  return family;
917 918 919 920 921 922
}

static PangoFontFace *
gtk_font_chooser_widget_get_face (GtkFontChooser *chooser)
{
  GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
923 924
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
  PangoFontFace *face;
925

926 927 928 929 930 931 932 933 934
  if (!gtk_list_store_iter_is_valid (GTK_LIST_STORE (priv->model), &priv->font_iter))
    return NULL;

  gtk_tree_model_get (priv->model, &priv->font_iter,
                      FACE_COLUMN, &face,
                      -1);
  g_object_unref (face);

  return face;
935 936 937 938 939 940 941
}

static gint
gtk_font_chooser_widget_get_size (GtkFontChooser *chooser)
{
  GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);

942
  return pango_font_description_get_size (fontchooser->priv->font_desc);
943 944 945
}

static gchar *
946
gtk_font_chooser_widget_get_font (GtkFontChooserWidget *fontchooser)
947
{
948 949
  return pango_font_description_to_string (fontchooser->priv->font_desc);
}
950

951
static PangoFontDescription *
952
gtk_font_chooser_widget_get_font_desc (GtkFontChooserWidget *fontchooser)
953 954
{
  return fontchooser->priv->font_desc;
955 956
}

957
static void
958 959
gtk_font_chooser_widget_set_font (GtkFontChooserWidget *fontchooser,
                                  const gchar          *fontname)
960 961 962 963
{
  PangoFontDescription *font_desc;

  font_desc = pango_font_description_from_string (fontname);
964
  gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc);
965 966 967
}

static void
968 969 970 971 972 973 974 975 976 977 978 979 980
gtk_font_chooser_widget_ensure_selection (GtkFontChooserWidget *fontchooser)
{
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
  GtkTreeSelection *selection;
  GtkTreeIter filter_iter;
  
  selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->family_face_list));

  if (gtk_list_store_iter_is_valid (GTK_LIST_STORE (priv->model), &priv->font_iter) &&
      gtk_tree_model_filter_convert_child_iter_to_iter (GTK_TREE_MODEL_FILTER (priv->filter_model),
                                                        &filter_iter,
                                                        &priv->font_iter))
    {
981 982 983
      GtkTreePath *path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->filter_model),
                                                   &filter_iter);

984
      gtk_tree_selection_select_iter (selection, &filter_iter);
985 986 987
      gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW (priv->family_face_list),
                                    path, NULL, FALSE, 0.0, 0.0);
      gtk_tree_path_free (path);
988 989 990 991 992 993 994 995 996 997 998
    }
  else
    {
      gtk_tree_selection_unselect_all (selection);
    }
}

static void
gtk_font_chooser_widget_merge_font_desc (GtkFontChooserWidget *fontchooser,
                                         PangoFontDescription *font_desc,
                                         GtkTreeIter          *iter)
999 1000
{
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1001
  PangoFontMask mask;
1002

1003 1004 1005 1006 1007 1008 1009 1010
  g_assert (font_desc != NULL);
  /* iter may be NULL if the font doesn't exist on the list */

  mask = pango_font_description_get_set_fields (font_desc);

  /* sucky test, because we can't restrict the comparison to 
   * only the parts that actually do get merged */
  if (pango_font_description_equal (font_desc, priv->font_desc))
1011 1012 1013 1014
    {
      pango_font_description_free (font_desc);
      return;
    }
1015

1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027
  pango_font_description_merge (priv->font_desc, font_desc, TRUE);
  
  if (mask & PANGO_FONT_MASK_SIZE)
    {
      double font_size = (double) pango_font_description_get_size (priv->font_desc) / PANGO_SCALE;
      /* XXX: This clamps, which can cause it to reloop into here, do we need
       * to block its signal handler? */
      gtk_range_set_value (GTK_RANGE (priv->size_slider), font_size);
      gtk_spin_button_set_value (GTK_SPIN_BUTTON (priv->size_spin), font_size);
    }
  if (mask & (PANGO_FONT_MASK_FAMILY | PANGO_FONT_MASK_STYLE | PANGO_FONT_MASK_VARIANT |
              PANGO_FONT_MASK_WEIGHT | PANGO_FONT_MASK_STRETCH))
1028 1029 1030 1031 1032 1033 1034 1035 1036 1037
    {
      if (&priv->font_iter != iter)
        {
          if (iter == NULL)
            memset (&priv->font_iter, 0, sizeof (GtkTreeIter));
          else
            memcpy (&priv->font_iter, iter, sizeof (GtkTreeIter));
          
          gtk_font_chooser_widget_ensure_selection (fontchooser);
        }
1038 1039

      gtk_font_chooser_widget_update_marks (fontchooser);
1040
    }
1041 1042 1043 1044 1045 1046 1047

  gtk_widget_override_font (priv->preview, priv->font_desc);

  pango_font_description_free (font_desc); /* adopted */

  g_object_notify (G_OBJECT (fontchooser), "font");
  g_object_notify (G_OBJECT (fontchooser), "font-desc");
1048 1049
}

1050
static void
1051 1052
gtk_font_chooser_widget_take_font_desc (GtkFontChooserWidget *fontchooser,
                                        PangoFontDescription *font_desc)
1053 1054
{
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1055 1056 1057 1058
  PangoFontMask mask;

  if (font_desc == NULL)
    font_desc = pango_font_description_from_string (GTK_FONT_CHOOSER_DEFAULT_FONT_NAME);
1059

1060 1061 1062
  mask = pango_font_description_get_set_fields (font_desc);
  if (mask & (PANGO_FONT_MASK_FAMILY | PANGO_FONT_MASK_STYLE | PANGO_FONT_MASK_VARIANT |
              PANGO_FONT_MASK_WEIGHT | PANGO_FONT_MASK_STRETCH))
1063
    {
1064
      GtkTreeIter iter;
1065

1066 1067 1068 1069 1070 1071 1072 1073 1074
      if (gtk_font_chooser_widget_find_font (fontchooser,
                                             font_desc,
                                             &iter))
        {
          gtk_font_chooser_widget_merge_font_desc (fontchooser,
                                                   font_desc,
                                                   &iter);
        }
      else
1075
        {
1076 1077 1078
          gtk_font_chooser_widget_merge_font_desc (fontchooser,
                                                   font_desc,
                                                   NULL);
1079 1080
        }
    }
1081
  else
1082
    {
1083 1084 1085 1086
      gtk_font_chooser_widget_merge_font_desc (fontchooser,
                                               font_desc,
                                               &priv->font_iter);
                                                          
1087
    }
1088 1089 1090 1091 1092
}

static const gchar*
gtk_font_chooser_widget_get_preview_text (GtkFontChooserWidget *fontchooser)
{
1093
  return fontchooser->priv->preview_text;
1094 1095 1096 1097 1098 1099
}

static void
gtk_font_chooser_widget_set_preview_text (GtkFontChooserWidget *fontchooser,
                                          const gchar          *text)
{
1100
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
1101

1102 1103
  g_free (priv->preview_text);
  priv->preview_text = g_strdup (text);
1104

1105
  gtk_entry_set_text (GTK_ENTRY (priv->preview), text);
1106 1107

  g_object_notify (G_OBJECT (fontchooser), "preview-text");
1108 1109 1110 1111

  /* XXX: There's no API to tell the treeview that a column has changed,
   * so we just */
  gtk_widget_queue_draw (priv->family_face_list);
1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144
}

static gboolean
gtk_font_chooser_widget_get_show_preview_entry (GtkFontChooserWidget *fontchooser)
{
  return fontchooser->priv->show_preview_entry;
}

static void
gtk_font_chooser_widget_set_show_preview_entry (GtkFontChooserWidget *fontchooser,
                                                gboolean              show_preview_entry)
{
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;

  if (priv->show_preview_entry != show_preview_entry)
    {
      fontchooser->priv->show_preview_entry = show_preview_entry;

      if (show_preview_entry)
        gtk_widget_show (fontchooser->priv->preview);
      else
        gtk_widget_hide (fontchooser->priv->preview);

      g_object_notify (G_OBJECT (fontchooser), "show-preview-entry");
    }
}

static void
gtk_font_chooser_widget_set_filter_func (GtkFontChooser  *chooser,
                                         GtkFontFilterFunc filter,
                                         gpointer          data,
                                         GDestroyNotify    destroy)
{
1145
  GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
1146 1147 1148 1149 1150 1151 1152 1153 1154
  GtkFontChooserWidgetPrivate *priv = fontchooser->priv;

  if (priv->filter_data_destroy)
    priv->filter_data_destroy (priv->filter_data);

  priv->filter_func = filter;
  priv->filter_data = data;
  priv->filter_data_destroy = destroy;

1155
  gtk_font_chooser_widget_refilter_font_list (fontchooser);
1156 1157 1158 1159 1160 1161 1162 1163 1164 1165
}

static void
gtk_font_chooser_widget_iface_init (GtkFontChooserIface *iface)
{
  iface->get_font_family = gtk_font_chooser_widget_get_family;
  iface->get_font_face = gtk_font_chooser_widget_get_face;
  iface->get_font_size = gtk_font_chooser_widget_get_size;
  iface->set_filter_func = gtk_font_chooser_widget_set_filter_func;
}