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gtk2/gtk/gtkfontchooserwidget.c
Sophie Herold a546ae32d7 Remove all nicks and blurbs from param specs 
Those property features don't seem to be in use anywhere.
They are redundant since the docs cover the same information
and more. They also created unnecessary translation work.

Closes #4904
2022-05-11 18:16:29 +02:00

2616 lines
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/* 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
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <glib/gprintf.h>
#include <string.h>
#include "gtkfontchooserwidget.h"
#include "gtkfontchooserwidgetprivate.h"
#include "gtkadjustment.h"
#include "gtkbuildable.h"
#include "gtkbox.h"
#include "gtkbinlayout.h"
#include "gtkcheckbutton.h"
#include "gtkcustomfilter.h"
#include "gtkentry.h"
#include "gtkfilter.h"
#include "gtkframe.h"
#include "gtkgrid.h"
#include "gtkfontchooser.h"
#include "gtkfontchooserutils.h"
#include "gtkintl.h"
#include "gtklabel.h"
#include "gtksingleselection.h"
#include "gtkstack.h"
#include "gtkprivate.h"
#include "gtkscale.h"
#include "gtkscrolledwindow.h"
#include "gtksearchentry.h"
#include "gtkspinbutton.h"
#include "gtktextview.h"
#include "gtkwidgetprivate.h"
#include "gtksettings.h"
#include "gtkdialog.h"
#include "gtkgestureclick.h"
#include "gtkeventcontrollerscroll.h"
#include "gtkroot.h"
#include "gtkfilterlistmodel.h"
#include "gtkflattenlistmodel.h"
#include "gtkslicelistmodel.h"
#include "gtkmaplistmodel.h"
#include "gtklistitem.h"
#include "gtksignallistitemfactory.h"
#include "gtkstringlist.h"
#include "gtklistview.h"
#include "gtksortlistmodel.h"
#include "gtkstringsorter.h"
#include <hb-ot.h>
#include "language-names.h"
#include "open-type-layout.h"
/**
* GtkFontChooserWidget:
*
* The `GtkFontChooserWidget` widget lets the user select a font.
*
* It is used in the `GtkFontChooserDialog` widget to provide a
* dialog for selecting fonts.
*
* To set the font which is initially selected, use
* [method@Gtk.FontChooser.set_font] or [method@Gtk.FontChooser.set_font_desc].
*
* To get the selected font use [method@Gtk.FontChooser.get_font] or
* [method@Gtk.FontChooser.get_font_desc].
*
* To change the text which is shown in the preview area, use
* [method@Gtk.FontChooser.set_preview_text].
*
* # CSS nodes
*
* `GtkFontChooserWidget` has a single CSS node with name fontchooser.
*/
typedef struct _GtkFontChooserWidgetClass GtkFontChooserWidgetClass;
struct _GtkFontChooserWidget
{
GtkWidget parent_instance;
GtkWidget *stack;
GtkWidget *grid;
GtkWidget *search_entry;
GtkWidget *family_face_list;
GtkWidget *list_stack;
GtkSingleSelection *selection;
GtkCustomFilter *custom_filter;
GtkCustomFilter *user_filter;
GtkFilterListModel *filter_model;
GtkWidget *preview;
GtkWidget *preview2;
GtkWidget *font_name_label;
char *preview_text;
gboolean show_preview_entry;
gboolean preview_text_set;
GtkWidget *size_label;
GtkWidget *size_spin;
GtkWidget *size_slider;
GtkWidget *size_slider2;
GtkWidget *axis_grid;
GtkWidget *feature_box;
GtkFrame *language_button;
GtkFrame *language_frame;
GtkWidget *language_list;
GtkStringList *languages;
GHashTable *language_table;
PangoLanguage *filter_language;
gboolean filter_by_language;
gboolean filter_by_monospace;
PangoFontMap *font_map;
PangoFontDescription *font_desc;
char *font_features;
PangoLanguage *language;
GtkFontFilterFunc filter_func;
gpointer filter_data;
GDestroyNotify filter_data_destroy;
guint last_fontconfig_timestamp;
GtkFontChooserLevel level;
GHashTable *axes;
gboolean updating_variations;
GList *feature_items;
GAction *tweak_action;
hb_map_t *glyphmap;
};
struct _GtkFontChooserWidgetClass
{
GtkWidgetClass parent_class;
};
enum {
PROP_ZERO,
PROP_TWEAK_ACTION
};
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 char *gtk_font_chooser_widget_get_font (GtkFontChooserWidget *fontchooser);
static void gtk_font_chooser_widget_set_font (GtkFontChooserWidget *fontchooser,
const char *fontname);
static PangoFontDescription *gtk_font_chooser_widget_get_font_desc (GtkFontChooserWidget *fontchooser);
static void gtk_font_chooser_widget_merge_font_desc(GtkFontChooserWidget *fontchooser,
const PangoFontDescription *font_desc);
static void gtk_font_chooser_widget_take_font_desc (GtkFontChooserWidget *fontchooser,
PangoFontDescription *font_desc);
static const char *gtk_font_chooser_widget_get_preview_text (GtkFontChooserWidget *fontchooser);
static void gtk_font_chooser_widget_set_preview_text (GtkFontChooserWidget *fontchooser,
const char *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);
static void gtk_font_chooser_widget_populate_features (GtkFontChooserWidget *fontchooser);
static void gtk_font_chooser_widget_set_level (GtkFontChooserWidget *fontchooser,
GtkFontChooserLevel level);
static GtkFontChooserLevel gtk_font_chooser_widget_get_level (GtkFontChooserWidget *fontchooser);
static void gtk_font_chooser_widget_set_language (GtkFontChooserWidget *fontchooser,
const char *language);
static void update_font_features (GtkFontChooserWidget *fontchooser);
static void gtk_font_chooser_widget_iface_init (GtkFontChooserIface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkFontChooserWidget, gtk_font_chooser_widget, GTK_TYPE_WIDGET,
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)
{
case GTK_FONT_CHOOSER_PROP_FONT:
gtk_font_chooser_widget_set_font (fontchooser, g_value_get_string (value));
break;
case GTK_FONT_CHOOSER_PROP_FONT_DESC:
gtk_font_chooser_widget_take_font_desc (fontchooser, g_value_dup_boxed (value));
break;
case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT:
gtk_font_chooser_widget_set_preview_text (fontchooser, g_value_get_string (value));
fontchooser->preview_text_set = TRUE;
break;
case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY:
gtk_font_chooser_widget_set_show_preview_entry (fontchooser, g_value_get_boolean (value));
break;
case GTK_FONT_CHOOSER_PROP_LEVEL:
gtk_font_chooser_widget_set_level (fontchooser, g_value_get_flags (value));
break;
case GTK_FONT_CHOOSER_PROP_LANGUAGE:
gtk_font_chooser_widget_set_language (fontchooser, g_value_get_string (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)
{
case PROP_TWEAK_ACTION:
g_value_set_object (value, G_OBJECT (fontchooser->tweak_action));
break;
case GTK_FONT_CHOOSER_PROP_FONT:
g_value_take_string (value, gtk_font_chooser_widget_get_font (fontchooser));
break;
case GTK_FONT_CHOOSER_PROP_FONT_DESC:
g_value_set_boxed (value, gtk_font_chooser_widget_get_font_desc (fontchooser));
break;
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;
case GTK_FONT_CHOOSER_PROP_LEVEL:
g_value_set_flags (value, gtk_font_chooser_widget_get_level (fontchooser));
break;
case GTK_FONT_CHOOSER_PROP_FONT_FEATURES:
g_value_set_string (value, fontchooser->font_features);
break;
case GTK_FONT_CHOOSER_PROP_LANGUAGE:
g_value_set_string (value, pango_language_to_string (fontchooser->language));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
stop_search_cb (GtkSearchEntry *entry,
GtkFontChooserWidget *fc)
{
if (gtk_editable_get_text (GTK_EDITABLE (entry))[0] != 0)
gtk_editable_set_text (GTK_EDITABLE (entry), "");
else
{
GtkWidget *dialog;
GtkWidget *button = NULL;
dialog = gtk_widget_get_ancestor (GTK_WIDGET (fc), GTK_TYPE_DIALOG);
if (dialog)
button = gtk_dialog_get_widget_for_response (GTK_DIALOG (dialog), GTK_RESPONSE_CANCEL);
if (button)
gtk_widget_activate (button);
}
}
static void
size_change_cb (GtkAdjustment *adjustment,
gpointer user_data)
{
GtkFontChooserWidget *fontchooser = user_data;
PangoFontDescription *font_desc;
double size = gtk_adjustment_get_value (adjustment);
font_desc = pango_font_description_new ();
if (pango_font_description_get_size_is_absolute (fontchooser->font_desc))
pango_font_description_set_absolute_size (font_desc, size * PANGO_SCALE);
else
pango_font_description_set_size (font_desc, size * PANGO_SCALE);
gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc);
}
static gboolean
output_cb (GtkSpinButton *spin,
gpointer data)
{
GtkAdjustment *adjustment;
char *text;
double value;
adjustment = gtk_spin_button_get_adjustment (spin);
value = gtk_adjustment_get_value (adjustment);
text = g_strdup_printf ("%2.4g", value);
gtk_editable_set_text (GTK_EDITABLE (spin), text);
g_free (text);
return TRUE;
}
static gboolean
user_filter_cb (gpointer item,
gpointer data)
{
GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (data);
PangoFontFamily *family;
PangoFontFace *face;
if (PANGO_IS_FONT_FAMILY (item))
{
family = item;
face = pango_font_family_get_face (family, NULL);
}
else
{
face = PANGO_FONT_FACE (item);
family = pango_font_face_get_family (face);
}
if (self->filter_by_monospace &&
!pango_font_family_is_monospace (family))
return FALSE;
if (self->filter_by_language &&
self->filter_language)
{
PangoFontDescription *desc;
PangoContext *context;
PangoFont *font;
gboolean ret;
PangoLanguage **langs;
desc = pango_font_face_describe (face);
pango_font_description_set_size (desc, 20);
context = gtk_widget_get_pango_context (GTK_WIDGET (self));
font = pango_context_load_font (context, desc);
ret = FALSE;
langs = pango_font_get_languages (font);
if (langs)
{
for (int i = 0; langs[i]; i++)
{
if (langs[i] == self->filter_language)
{
ret = TRUE;
break;
}
}
}
g_object_unref (font);
pango_font_description_free (desc);
return ret;
}
return TRUE;
}
static void
monospace_check_changed (GtkCheckButton *check,
GParamSpec *pspec,
GtkFontChooserWidget *self)
{
self->filter_by_monospace = gtk_check_button_get_active (check);
gtk_filter_changed (GTK_FILTER (self->user_filter),
self->filter_by_monospace ? GTK_FILTER_CHANGE_MORE_STRICT
: GTK_FILTER_CHANGE_LESS_STRICT);
}
static void
language_check_changed (GtkCheckButton *check,
GParamSpec *pspec,
GtkFontChooserWidget *self)
{
self->filter_by_language = gtk_check_button_get_active (check);
gtk_filter_changed (GTK_FILTER (self->user_filter),
self->filter_by_language ? GTK_FILTER_CHANGE_MORE_STRICT
: GTK_FILTER_CHANGE_LESS_STRICT);
}
static void
gtk_font_chooser_widget_update_marks (GtkFontChooserWidget *self)
{
GtkAdjustment *adj, *spin_adj;
const int *sizes;
int *font_sizes;
int i, n_sizes;
double value, spin_value;
gpointer item;
item = gtk_single_selection_get_selected_item (self->selection);
if (item)
{
PangoFontFace *face;
if (PANGO_IS_FONT_FAMILY (item))
face = pango_font_family_get_face (item, NULL);
else
face = item;
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;
}
else
{
font_sizes = NULL;
n_sizes = 0;
}
if (n_sizes < 2)
{
static const int fallback_sizes[] = {
6, 8, 9, 10, 11, 12, 13, 14, 16, 20, 24, 36, 48, 72
};
sizes = fallback_sizes;
n_sizes = G_N_ELEMENTS (fallback_sizes);
}
else
{
sizes = font_sizes;
}
gtk_scale_clear_marks (GTK_SCALE (self->size_slider));
gtk_scale_clear_marks (GTK_SCALE (self->size_slider2));
adj = gtk_range_get_adjustment (GTK_RANGE (self->size_slider));
spin_adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (self->size_spin));
spin_value = gtk_adjustment_get_value (spin_adj);
if (spin_value < sizes[0])
value = (double) sizes[0];
else if (spin_value > sizes[n_sizes - 1])
value = (double)sizes[n_sizes - 1];
else
value = (double)spin_value;
/* ensure clamping doesn't callback into font resizing code */
g_signal_handlers_block_by_func (adj, size_change_cb, self);
gtk_adjustment_configure (adj,
value,
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, self);
for (i = 0; i < n_sizes; i++)
{
gtk_scale_add_mark (GTK_SCALE (self->size_slider),
sizes[i],
GTK_POS_BOTTOM, NULL);
gtk_scale_add_mark (GTK_SCALE (self->size_slider2),
sizes[i],
GTK_POS_BOTTOM, NULL);
}
g_free (font_sizes);
}
static void
row_activated_cb (GtkWidget *view,
guint pos,
gpointer user_data)
{
GtkFontChooserWidget *fontchooser = user_data;
char *fontname;
fontname = gtk_font_chooser_widget_get_font (fontchooser);
_gtk_font_chooser_font_activated (GTK_FONT_CHOOSER (fontchooser), fontname);
g_free (fontname);
}
static void
resize_by_scroll_cb (GtkEventControllerScroll *controller,
double dx,
double dy,
gpointer user_data)
{
GtkFontChooserWidget *self = user_data;
GtkAdjustment *adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (self->size_spin));
gtk_adjustment_set_value (adj,
gtk_adjustment_get_value (adj) +
gtk_adjustment_get_step_increment (adj) * dx);
}
static void
maybe_update_preview_text (GtkFontChooserWidget *self,
PangoFontFace *face,
PangoFontDescription *desc)
{
PangoContext *context;
PangoFont *font;
const char *sample;
PangoLanguage **languages;
GHashTable *langs = NULL;
PangoLanguage *default_lang;
PangoLanguage *alt_default = NULL;
PangoLanguage *lang = NULL;
int i;
const char *p;
/* If the user has typed text into the entry, we don't touch it */
if (self->preview_text_set)
return;
if (self->filter_by_language && self->filter_language)
{
sample = pango_language_get_sample_string (self->filter_language);
gtk_font_chooser_widget_set_preview_text (self, sample);
return;
}
/* We do the work only once, and cache the result on the PangoFontFace */
sample = (const char *)g_object_get_data (G_OBJECT (face), "gtk-sample-text");
if (sample)
{
gtk_font_chooser_widget_set_preview_text (self, sample);
return;
}
context = gtk_widget_get_pango_context (GTK_WIDGET (self));
font = pango_context_load_font (context, desc);
default_lang = pango_language_get_default ();
p = pango_language_to_string (default_lang);
/* The default language tends to be of the form en-us.
* Since fontconfig languages just have the language part,
* and we want to use direct pointer comparisons, we need
* an PangoLanguage for the shortened default language.
*/
if (strchr (p, '-'))
{
char q[10];
for (i = 0; p[i] != '-' && i < 9; i++)
q[i] = p[i];
q[i] = '\0';
alt_default = pango_language_from_string (q);
}
languages = pango_font_get_languages (font);
/* If the font supports the default language, just use it. */
if (languages)
for (i = 0; languages[i]; i++)
{
if (languages[i] == default_lang || languages[i] == alt_default)
{
lang = default_lang;
goto found;
}
}
/* Otherwise, we make a list of representative languages */
langs = g_hash_table_new (NULL, NULL);
if (languages)
for (i = 0; languages[i]; i++)
{
const PangoScript *scripts;
int num, j;
scripts = pango_language_get_scripts (languages[i], &num);
for (j = 0; j < num; j++)
{
lang = pango_script_get_sample_language (scripts[j]);
if (lang)
g_hash_table_add (langs, lang);
}
}
/* ... and compare it to the users default and preferred languages */
if (g_hash_table_contains (langs, default_lang) ||
g_hash_table_contains (langs, alt_default))
{
lang = default_lang;
}
else
{
PangoLanguage **preferred;
preferred = pango_language_get_preferred ();
if (preferred)
{
for (i = 0; preferred[i]; i++)
{
if (g_hash_table_contains (langs, preferred[i]))
{
lang = preferred[i];
break;
}
}
}
g_hash_table_unref (langs);
found:
sample = pango_language_get_sample_string (lang);
gtk_font_chooser_widget_set_preview_text (self, sample);
g_object_set_data (G_OBJECT (face), "gtk-sample-text", (gpointer)sample);
}
g_object_unref (font);
}
static void
selection_changed_cb (GtkSingleSelection *selection,
GParamSpec *pspec,
GtkFontChooserWidget *self)
{
gpointer item;
item = gtk_single_selection_get_selected_item (selection);
if (item)
{
PangoFontFace *face;
PangoFontDescription *desc;
if (PANGO_IS_FONT_FAMILY (item))
face = pango_font_family_get_face (item, NULL);
else
face = item;
desc = pango_font_face_describe (face);
pango_font_description_set_variations (self->font_desc, NULL);
gtk_font_chooser_widget_merge_font_desc (self, desc);
g_simple_action_set_enabled (G_SIMPLE_ACTION (self->tweak_action), TRUE);
maybe_update_preview_text (self, face, desc);
pango_font_description_free (desc);
}
else
{
g_simple_action_set_state (G_SIMPLE_ACTION (self->tweak_action), g_variant_new_boolean (FALSE));
g_simple_action_set_enabled (G_SIMPLE_ACTION (self->tweak_action), FALSE);
}
g_object_notify (G_OBJECT (self), "font");
g_object_notify (G_OBJECT (self), "font-desc");
}
static char *
get_font_name (GObject *ignore,
gpointer item)
{
if (item == NULL)
return NULL;
if (PANGO_IS_FONT_FACE (item))
{
return g_strconcat (pango_font_family_get_name (pango_font_face_get_family (item)),
" ",
pango_font_face_get_face_name (item),
NULL);
}
else
{
return g_strdup (pango_font_family_get_name (item));
}
}
static PangoAttrList *
get_font_attributes (GObject *ignore,
gpointer item)
{
PangoAttribute *attribute;
PangoAttrList *attrs;
attrs = pango_attr_list_new ();
if (item)
{
PangoFontFace *face;
PangoFontDescription *font_desc;
if (PANGO_IS_FONT_FAMILY (item))
face = pango_font_family_get_face (item, NULL);
else
face = item;
if (face)
{
font_desc = pango_font_face_describe (face);
attribute = pango_attr_font_desc_new (font_desc);
pango_attr_list_insert (attrs, attribute);
pango_font_description_free (font_desc);
}
}
return attrs;
}
static void
gtk_font_chooser_widget_update_preview_attributes (GtkFontChooserWidget *fontchooser)
{
PangoAttrList *attrs;
attrs = pango_attr_list_new ();
/* Prevent font fallback */
pango_attr_list_insert (attrs, pango_attr_fallback_new (FALSE));
/* Force current font and features */
pango_attr_list_insert (attrs, pango_attr_font_desc_new (fontchooser->font_desc));
if (fontchooser->font_features)
pango_attr_list_insert (attrs, pango_attr_font_features_new (fontchooser->font_features));
if (fontchooser->language)
pango_attr_list_insert (attrs, pango_attr_language_new (fontchooser->language));
gtk_entry_set_attributes (GTK_ENTRY (fontchooser->preview), attrs);
pango_attr_list_unref (attrs);
}
static void
rows_changed_cb (GtkFontChooserWidget *self)
{
const char *page;
if (g_list_model_get_n_items (G_LIST_MODEL (self->selection)) == 0 &&
gtk_filter_list_model_get_pending (GTK_FILTER_LIST_MODEL (self->filter_model)) == 0)
page = "empty";
else
page = "list";
if (strcmp (gtk_stack_get_visible_child_name (GTK_STACK (self->list_stack)), page) != 0)
gtk_stack_set_visible_child_name (GTK_STACK (self->list_stack), page);
}
static void
update_key_capture (GtkWidget *chooser)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
GtkWidget *capture_widget;
if (gtk_widget_get_mapped (chooser) &&
g_str_equal (gtk_stack_get_visible_child_name (GTK_STACK (fontchooser->stack)), "list"))
{
GtkWidget *toplevel;
GtkWidget *focus;
toplevel = GTK_WIDGET (gtk_widget_get_root (chooser));
focus = gtk_root_get_focus (GTK_ROOT (toplevel));
if (GTK_IS_EDITABLE (focus) && focus != fontchooser->search_entry)
capture_widget = NULL;
else
capture_widget = chooser;
}
else
capture_widget = NULL;
gtk_search_entry_set_key_capture_widget (GTK_SEARCH_ENTRY (fontchooser->search_entry),
capture_widget);
}
static void
gtk_font_chooser_widget_map (GtkWidget *widget)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (widget);
gtk_editable_set_text (GTK_EDITABLE (fontchooser->search_entry), "");
gtk_stack_set_visible_child_name (GTK_STACK (fontchooser->stack), "list");
g_simple_action_set_state (G_SIMPLE_ACTION (fontchooser->tweak_action), g_variant_new_boolean (FALSE));
GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->map (widget);
update_key_capture (widget);
}
static void
gtk_font_chooser_widget_unmap (GtkWidget *widget)
{
update_key_capture (widget);
GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->unmap (widget);
}
static void
gtk_font_chooser_widget_root (GtkWidget *widget)
{
GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->root (widget);
g_signal_connect_swapped (gtk_widget_get_root (widget), "notify::focus-widget",
G_CALLBACK (update_key_capture), widget);
}
static void
gtk_font_chooser_widget_unroot (GtkWidget *widget)
{
g_signal_handlers_disconnect_by_func (gtk_widget_get_root (widget),
update_key_capture, widget);
GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->unroot (widget);
}
static void
gtk_font_chooser_widget_dispose (GObject *object)
{
GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (object);
g_signal_handlers_disconnect_by_func (self->selection, rows_changed_cb, self);
g_signal_handlers_disconnect_by_func (self->filter_model, rows_changed_cb, self);
self->filter_func = NULL;
g_clear_pointer (&self->filter_data, self->filter_data_destroy);
g_clear_pointer (&self->stack, gtk_widget_unparent);
g_clear_pointer (&self->language_table, g_hash_table_unref);
G_OBJECT_CLASS (gtk_font_chooser_widget_parent_class)->dispose (object);
}
static void
gtk_font_chooser_widget_class_init (GtkFontChooserWidgetClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GParamSpec *pspec;
g_type_ensure (G_TYPE_THEMED_ICON);
widget_class->root = gtk_font_chooser_widget_root;
widget_class->unroot = gtk_font_chooser_widget_unroot;
widget_class->map = gtk_font_chooser_widget_map;
widget_class->unmap = gtk_font_chooser_widget_unmap;
gobject_class->finalize = gtk_font_chooser_widget_finalize;
gobject_class->dispose = gtk_font_chooser_widget_dispose;
gobject_class->set_property = gtk_font_chooser_widget_set_property;
gobject_class->get_property = gtk_font_chooser_widget_get_property;
/**
* GtkFontChooserWidget:tweak-action:
*
* A toggle action that can be used to switch to the tweak page
* of the font chooser widget, which lets the user tweak the
* OpenType features and variation axes of the selected font.
*
* The action will be enabled or disabled depending on whether
* the selected font has any features or axes.
*/
pspec = g_param_spec_object ("tweak-action", NULL, NULL,
G_TYPE_ACTION,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
g_object_class_install_property (gobject_class, PROP_TWEAK_ACTION, pspec);
_gtk_font_chooser_install_properties (gobject_class);
/* Bind class to template */
gtk_widget_class_set_template_from_resource (widget_class,
"/org/gtk/libgtk/ui/gtkfontchooserwidget.ui");
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, search_entry);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, family_face_list);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, list_stack);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, filter_model);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, selection);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, custom_filter);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, user_filter);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, preview);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, preview2);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, size_label);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, size_spin);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, size_slider);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, size_slider2);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, stack);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, grid);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, font_name_label);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, feature_box);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, axis_grid);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, language_button);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, language_frame);
gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, language_list);
gtk_widget_class_bind_template_callback (widget_class, get_font_name);
gtk_widget_class_bind_template_callback (widget_class, get_font_attributes);
gtk_widget_class_bind_template_callback (widget_class, stop_search_cb);
gtk_widget_class_bind_template_callback (widget_class, row_activated_cb);
gtk_widget_class_bind_template_callback (widget_class, rows_changed_cb);
gtk_widget_class_bind_template_callback (widget_class, size_change_cb);
gtk_widget_class_bind_template_callback (widget_class, output_cb);
gtk_widget_class_bind_template_callback (widget_class, selection_changed_cb);
gtk_widget_class_bind_template_callback (widget_class, resize_by_scroll_cb);
gtk_widget_class_bind_template_callback (widget_class, monospace_check_changed);
gtk_widget_class_bind_template_callback (widget_class, language_check_changed);
gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BIN_LAYOUT);
gtk_widget_class_set_css_name (widget_class, I_("fontchooser"));
}
static void
change_tweak (GSimpleAction *action,
GVariant *state,
gpointer data)
{
GtkFontChooserWidget *fontchooser = data;
gboolean tweak = g_variant_get_boolean (state);
if (tweak)
{
gtk_entry_grab_focus_without_selecting (GTK_ENTRY (fontchooser->preview2));
gtk_stack_set_visible_child_name (GTK_STACK (fontchooser->stack), "tweaks");
}
else
{
gtk_widget_grab_focus (fontchooser->search_entry);
gtk_stack_set_visible_child_name (GTK_STACK (fontchooser->stack), "list");
}
g_simple_action_set_state (action, state);
}
typedef struct {
guint32 tag;
float default_value;
GtkAdjustment *adjustment;
GtkWidget *label;
GtkWidget *scale;
GtkWidget *spin;
GtkWidget *fontchooser;
} Axis;
static guint
axis_hash (gconstpointer v)
{
const Axis *a = v;
return a->tag;
}
static gboolean
axis_equal (gconstpointer v1, gconstpointer v2)
{
const Axis *a1 = v1;
const Axis *a2 = v2;
return a1->tag == a2->tag;
}
static void
axis_remove (gpointer key,
gpointer value,
gpointer data)
{
GtkFontChooserWidget *fontchooser = data;
Axis *a = value;
gtk_grid_remove (GTK_GRID (fontchooser->axis_grid), a->label);
gtk_grid_remove (GTK_GRID (fontchooser->axis_grid), a->scale);
gtk_grid_remove (GTK_GRID (fontchooser->axis_grid), a->spin);
}
static void
axis_free (gpointer v)
{
Axis *a = v;
g_free (a);
}
static void
select_added (GListModel *model,
guint position,
guint removed,
guint added,
gpointer data)
{
GtkSingleSelection *selection = GTK_SINGLE_SELECTION (model);
g_assert (removed == 0);
g_assert (added == 1);
gtk_single_selection_set_selected (selection, position);
}
static void
add_languages_from_font (GtkFontChooserWidget *self,
gpointer item)
{
PangoFontFace *face;
PangoFontDescription *desc;
PangoFont *font;
PangoContext *context;
GtkSelectionModel *model = gtk_list_view_get_model (GTK_LIST_VIEW (self->language_list));
PangoLanguage *default_lang = pango_language_get_default ();
PangoLanguage **langs;
int i;
if (PANGO_IS_FONT_FAMILY (item))
face = pango_font_family_get_face (PANGO_FONT_FAMILY (item), NULL);
else
face = PANGO_FONT_FACE (item);
if (!face)
return;
desc = pango_font_face_describe (face);
pango_font_description_set_size (desc, 20);
context = gtk_widget_get_pango_context (GTK_WIDGET (self));
font = pango_context_load_font (context, desc);
langs = pango_font_get_languages (font);
if (langs)
{
for (i = 0; langs[i]; i++)
{
if (!g_hash_table_contains (self->language_table, langs[i]))
{
g_hash_table_add (self->language_table, langs[i]);
if (get_language_name (langs[i]))
{
const char *l = pango_language_to_string (langs[i]);
gulong id = 0;
/* Pre-select the default language */
if (pango_language_matches (default_lang, l))
id = g_signal_connect (model, "items-changed", G_CALLBACK (select_added), NULL);
gtk_string_list_append (self->languages, l);
if (id)
g_signal_handler_disconnect (model, id);
}
}
}
}
g_object_unref (font);
pango_font_description_free (desc);
}
static gboolean
gtk_font_chooser_widget_ensure_matching_selection (GtkFontChooserWidget *self);
/* We incrementally populate our fontlist to prevent blocking
* the font chooser for a long time with expensive FcFontSort
* calls in pango for every row in the list).
*/
static gboolean
add_to_fontlist (GtkWidget *widget,
GdkFrameClock *clock,
gpointer user_data)
{
GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (widget);
GtkSliceListModel *model = user_data;
GListModel *child_model;
guint i G_GNUC_UNUSED;
guint n G_GNUC_UNUSED;
if (gtk_filter_list_model_get_model (self->filter_model) != G_LIST_MODEL (model))
return G_SOURCE_REMOVE;
child_model = gtk_slice_list_model_get_model (model);
n = gtk_slice_list_model_get_size (model);
for (i = n; i < n + 10; i++)
{
gpointer item = g_list_model_get_item (child_model, i);
if (!item)
break;
add_languages_from_font (self, item);
g_object_unref (item);
}
n += 10;
if (n >= g_list_model_get_n_items (child_model))
n = G_MAXUINT;
gtk_slice_list_model_set_size (model, n);
if (gtk_single_selection_get_selected (GTK_SINGLE_SELECTION (self->selection)) == GTK_INVALID_LIST_POSITION)
gtk_font_chooser_widget_ensure_matching_selection (self);
if (n == G_MAXUINT)
return G_SOURCE_REMOVE;
else
return G_SOURCE_CONTINUE;
}
static void
update_fontlist (GtkFontChooserWidget *self)
{
PangoFontMap *fontmap;
GListModel *model;
fontmap = self->font_map;
if (!fontmap)
fontmap = pango_cairo_font_map_get_default ();
if ((self->level & GTK_FONT_CHOOSER_LEVEL_STYLE) == 0)
model = g_object_ref (G_LIST_MODEL (fontmap));
else
model = G_LIST_MODEL (gtk_flatten_list_model_new (G_LIST_MODEL (g_object_ref (fontmap))));
model = G_LIST_MODEL (gtk_slice_list_model_new (model, 0, 20));
gtk_widget_add_tick_callback (GTK_WIDGET (self), add_to_fontlist, g_object_ref (model), g_object_unref);
gtk_filter_list_model_set_model (self->filter_model, model);
g_object_unref (model);
}
static void
setup_lang_item (GtkSignalListItemFactory *factory,
gpointer item,
gpointer data)
{
GtkWidget *label;
label = gtk_label_new (NULL);
gtk_label_set_xalign (GTK_LABEL (label), 0);
gtk_list_item_set_child (GTK_LIST_ITEM (item), label);
}
static void
bind_lang_item (GtkSignalListItemFactory *factory,
gpointer item,
gpointer data)
{
GtkWidget *label;
gpointer obj;
const char *str;
PangoLanguage *language;
const char *name;
obj = gtk_list_item_get_item (GTK_LIST_ITEM (item));
str = gtk_string_object_get_string (GTK_STRING_OBJECT (obj));
language = pango_language_from_string (str);
name = get_language_name (language);
label = gtk_list_item_get_child (GTK_LIST_ITEM (item));
gtk_label_set_label (GTK_LABEL (label), name);
}
static char *
get_lang_name (gpointer this,
const char *lang)
{
return g_strdup (get_language_name (pango_language_from_string (lang)));
}
static void
language_selection_changed (GtkSelectionModel *model,
guint position,
guint n_items,
GtkFontChooserWidget *self)
{
gpointer obj;
obj = gtk_single_selection_get_selected_item (GTK_SINGLE_SELECTION (model));
if (obj)
self->filter_language = pango_language_from_string (gtk_string_object_get_string (obj));
else
self->filter_language = NULL;
if (self->filter_by_language)
gtk_filter_changed (GTK_FILTER (self->user_filter), GTK_FILTER_CHANGE_DIFFERENT);
}
static gboolean
setup_language_list (GtkFontChooserWidget *self)
{
GtkListItemFactory *factory;
GtkExpression *expression;
GListModel *model;
GtkSelectionModel *selection;
self->languages = gtk_string_list_new (NULL);
self->language_table = g_hash_table_new (NULL, NULL);
expression = gtk_property_expression_new (GTK_TYPE_STRING_OBJECT, NULL, "string");
expression = gtk_cclosure_expression_new (G_TYPE_STRING, NULL, 1, &expression, (GCallback)get_lang_name, NULL, NULL);
model = G_LIST_MODEL (gtk_sort_list_model_new (G_LIST_MODEL (self->languages),
GTK_SORTER (gtk_string_sorter_new (expression))));
selection = GTK_SELECTION_MODEL (gtk_single_selection_new (model));
g_signal_connect (selection, "selection-changed", G_CALLBACK (language_selection_changed), self);
gtk_list_view_set_model (GTK_LIST_VIEW (self->language_list), selection);
g_object_unref (selection);
factory = gtk_signal_list_item_factory_new ();
g_signal_connect (factory, "setup", G_CALLBACK (setup_lang_item), self);
g_signal_connect (factory, "bind", G_CALLBACK (bind_lang_item), self);
gtk_list_view_set_factory (GTK_LIST_VIEW (self->language_list), factory);
g_object_unref (factory);
return TRUE;
}
static void
gtk_font_chooser_widget_init (GtkFontChooserWidget *self)
{
gtk_widget_init_template (GTK_WIDGET (self));
self->axes = g_hash_table_new_full (axis_hash, axis_equal, NULL, axis_free);
/* Default preview string */
self->preview_text = g_strdup (pango_language_get_sample_string (NULL));
self->show_preview_entry = TRUE;
self->font_desc = pango_font_description_new ();
self->level = GTK_FONT_CHOOSER_LEVEL_FAMILY |
GTK_FONT_CHOOSER_LEVEL_STYLE |
GTK_FONT_CHOOSER_LEVEL_SIZE;
self->language = pango_language_get_default ();
/* Set default preview text */
gtk_editable_set_text (GTK_EDITABLE (self->preview), self->preview_text);
gtk_font_chooser_widget_update_preview_attributes (self);
/* Set the upper values of the spin/scale with G_MAXINT / PANGO_SCALE */
gtk_spin_button_set_range (GTK_SPIN_BUTTON (self->size_spin),
1.0, (double)(G_MAXINT / PANGO_SCALE));
gtk_adjustment_set_upper (gtk_range_get_adjustment (GTK_RANGE (self->size_slider)),
(double)(G_MAXINT / PANGO_SCALE));
self->tweak_action = G_ACTION (g_simple_action_new_stateful ("tweak", NULL, g_variant_new_boolean (FALSE)));
g_signal_connect (self->tweak_action, "change-state", G_CALLBACK (change_tweak), self);
update_fontlist (self);
/* Load data and set initial style-dependent parameters */
gtk_font_chooser_widget_populate_features (self);
gtk_font_chooser_widget_take_font_desc (self, NULL);
gtk_custom_filter_set_filter_func (self->user_filter, user_filter_cb, self, NULL);
setup_language_list (self);
}
/**
* gtk_font_chooser_widget_new:
*
* Creates a new `GtkFontChooserWidget`.
*
* Returns: a new `GtkFontChooserWidget`
*/
GtkWidget *
gtk_font_chooser_widget_new (void)
{
return g_object_new (GTK_TYPE_FONT_CHOOSER_WIDGET, NULL);
}
static void
gtk_font_chooser_widget_finalize (GObject *object)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);
if (fontchooser->font_desc)
pango_font_description_free (fontchooser->font_desc);
if (fontchooser->filter_data_destroy)
fontchooser->filter_data_destroy (fontchooser->filter_data);
g_free (fontchooser->preview_text);
g_clear_object (&fontchooser->font_map);
g_object_unref (fontchooser->tweak_action);
g_list_free_full (fontchooser->feature_items, g_free);
g_hash_table_unref (fontchooser->axes);
g_free (fontchooser->font_features);
G_OBJECT_CLASS (gtk_font_chooser_widget_parent_class)->finalize (object);
}
static gboolean
my_pango_font_family_equal (const char *familya,
const char *familyb)
{
return g_ascii_strcasecmp (familya, familyb) == 0;
}
static gboolean
gtk_font_chooser_widget_ensure_matching_selection (GtkFontChooserWidget *self)
{
const char *desc_family;
guint i, n;
desc_family = pango_font_description_get_family (self->font_desc);
if (desc_family == NULL)
{
gtk_single_selection_set_selected (self->selection, GTK_INVALID_LIST_POSITION);
return TRUE;
}
n = g_list_model_get_n_items (G_LIST_MODEL (self->selection));
for (i = 0; i < n; i++)
{
gpointer item;
PangoFontFace *face;
PangoFontFamily *family;
PangoFontDescription *merged;
item = g_list_model_get_item (G_LIST_MODEL (self->selection), i);
g_object_unref (item);
if (PANGO_IS_FONT_FAMILY (item))
{
family = item;
face = pango_font_family_get_face (family, NULL);
}
else
{
face = item;
family = pango_font_face_get_family (face);
}
if (!my_pango_font_family_equal (desc_family, pango_font_family_get_name (family)))
continue;
merged = pango_font_face_describe (face);
pango_font_description_merge_static (merged, self->font_desc, FALSE);
if (pango_font_description_equal (merged, self->font_desc))
{
pango_font_description_free (merged);
break;
}
pango_font_description_free (merged);
}
if (i < n)
{
gtk_single_selection_set_selected (self->selection, i);
return TRUE;
}
return FALSE;
}
static PangoFontFace *
gtk_font_chooser_widget_get_face (GtkFontChooser *chooser)
{
GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (chooser);
gpointer item;
item = gtk_single_selection_get_selected_item (self->selection);
if (PANGO_IS_FONT_FAMILY (item))
return pango_font_family_get_face (item, NULL);
else
return item;
}
static PangoFontFamily *
gtk_font_chooser_widget_get_family (GtkFontChooser *chooser)
{
GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (chooser);
gpointer item;
item = gtk_single_selection_get_selected_item (self->selection);
if (item == NULL)
return NULL;
if (PANGO_IS_FONT_FAMILY (item))
return item;
else
return pango_font_face_get_family (item);
}
static int
gtk_font_chooser_widget_get_size (GtkFontChooser *chooser)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
PangoFontDescription *desc = gtk_font_chooser_widget_get_font_desc (fontchooser);
if (desc)
return pango_font_description_get_size (desc);
return -1;
}
static char *
gtk_font_chooser_widget_get_font (GtkFontChooserWidget *fontchooser)
{
PangoFontDescription *desc = gtk_font_chooser_widget_get_font_desc (fontchooser);
if (desc)
return pango_font_description_to_string (desc);
return NULL;
}
static PangoFontDescription *
gtk_font_chooser_widget_get_font_desc (GtkFontChooserWidget *self)
{
if (gtk_single_selection_get_selected_item (self->selection))
return self->font_desc;
return NULL;
}
static void
gtk_font_chooser_widget_set_font (GtkFontChooserWidget *fontchooser,
const char *fontname)
{
PangoFontDescription *font_desc;
font_desc = pango_font_description_from_string (fontname);
gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc);
}
/* OpenType variations */
static void
add_font_variations (GtkFontChooserWidget *fontchooser,
GString *s)
{
GHashTableIter iter;
Axis *axis;
g_hash_table_iter_init (&iter, fontchooser->axes);
while (g_hash_table_iter_next (&iter, (gpointer *)NULL, (gpointer *)&axis))
{
double value;
char buf[128];
value = gtk_adjustment_get_value (axis->adjustment);
if (value == axis->default_value)
continue;
hb_variation_to_string (&(hb_variation_t) { axis->tag, value }, buf, sizeof (buf));
if (s->len > 0)
g_string_append_c (s, ',');
g_string_append (s, buf);
}
}
static void
adjustment_changed (GtkAdjustment *adjustment,
Axis *axis)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (axis->fontchooser);
PangoFontDescription *font_desc;
GString *s;
fontchooser->updating_variations = TRUE;
s = g_string_new ("");
add_font_variations (fontchooser, s);
font_desc = pango_font_description_new ();
pango_font_description_set_variations (font_desc, s->str);
gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc);
g_string_free (s, TRUE);
fontchooser->updating_variations = FALSE;
}
static gboolean
should_show_axis (hb_ot_var_axis_info_t *ax)
{
return (ax->flags & HB_OT_VAR_AXIS_FLAG_HIDDEN) == 0;
}
static gboolean
is_named_instance (hb_font_t *font)
{
/* FIXME */
return FALSE;
}
static struct {
guint32 tag;
const char *name;
} axis_names[] = {
{ HB_OT_TAG_VAR_AXIS_WIDTH, NC_("Font variation axis", "Width") },
{ HB_OT_TAG_VAR_AXIS_WEIGHT, NC_("Font variation axis", "Weight") },
{ HB_OT_TAG_VAR_AXIS_ITALIC, NC_("Font variation axis", "Italic") },
{ HB_OT_TAG_VAR_AXIS_SLANT, NC_("Font variation axis", "Slant") },
{ HB_OT_TAG_VAR_AXIS_OPTICAL_SIZE, NC_("Font variation axis", "Optical Size") },
};
static gboolean
add_axis (GtkFontChooserWidget *fontchooser,
hb_font_t *hb_font,
hb_ot_var_axis_info_t *ax,
int value,
int row)
{
hb_face_t *hb_face;
Axis *axis;
const char *name;
char buffer[20];
unsigned int buffer_len = 20;
int i;
hb_face = hb_font_get_face (hb_font);
axis = g_new (Axis, 1);
axis->tag = ax->tag;
axis->default_value = ax->default_value;
axis->fontchooser = GTK_WIDGET (fontchooser);
hb_ot_name_get_utf8 (hb_face, ax->name_id, HB_LANGUAGE_INVALID, &buffer_len, buffer);
name = buffer;
for (i = 0; i < G_N_ELEMENTS (axis_names); i++)
{
if (axis_names[i].tag == ax->tag)
{
name = g_dpgettext2 (NULL, "Font variation axis", axis_names[i].name);
break;
}
}
axis->label = gtk_label_new (name);
gtk_widget_set_halign (axis->label, GTK_ALIGN_START);
gtk_widget_set_valign (axis->label, GTK_ALIGN_BASELINE);
gtk_grid_attach (GTK_GRID (fontchooser->axis_grid), axis->label, 0, row, 1, 1);
axis->adjustment = gtk_adjustment_new ((double)value,
(double)ax->min_value,
(double)ax->max_value,
1.0, 10.0, 0.0);
axis->scale = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, axis->adjustment);
gtk_scale_add_mark (GTK_SCALE (axis->scale), (double)ax->default_value, GTK_POS_TOP, NULL);
gtk_widget_set_valign (axis->scale, GTK_ALIGN_BASELINE);
gtk_widget_set_hexpand (axis->scale, TRUE);
gtk_widget_set_size_request (axis->scale, 100, -1);
gtk_scale_set_draw_value (GTK_SCALE (axis->scale), FALSE);
gtk_grid_attach (GTK_GRID (fontchooser->axis_grid), axis->scale, 1, row, 1, 1);
axis->spin = gtk_spin_button_new (axis->adjustment, 0, 0);
g_signal_connect (axis->spin, "output", G_CALLBACK (output_cb), fontchooser);
gtk_widget_set_valign (axis->spin, GTK_ALIGN_BASELINE);
gtk_grid_attach (GTK_GRID (fontchooser->axis_grid), axis->spin, 2, row, 1, 1);
g_hash_table_add (fontchooser->axes, axis);
adjustment_changed (axis->adjustment, axis);
g_signal_connect (axis->adjustment, "value-changed", G_CALLBACK (adjustment_changed), axis);
if (is_named_instance (hb_font) || !should_show_axis (ax))
{
gtk_widget_hide (axis->label);
gtk_widget_hide (axis->scale);
gtk_widget_hide (axis->spin);
return FALSE;
}
return TRUE;
}
#if HB_VERSION_ATLEAST (3, 3, 0)
static void
get_axes_and_values (hb_font_t *font,
unsigned int n_axes,
hb_ot_var_axis_info_t *axes,
float *coords)
{
const float *dcoords;
unsigned int length = n_axes;
hb_ot_var_get_axis_infos (hb_font_get_face (font), 0, &length, axes);
dcoords = hb_font_get_var_coords_design (font, &length);
if (dcoords)
memcpy (coords, dcoords, sizeof (float) * length);
else
{
for (int i = 0; i < n_axes; i++)
{
hb_ot_var_axis_info_t *axis = &axes[i];
coords[axis->axis_index] = axis->default_value;
}
}
}
#else
/* FIXME: This doesn't work if the font has an avar table */
static float
denorm_coord (hb_ot_var_axis_info_t *axis, int coord)
{
float r = coord / 16384.0;
if (coord < 0)
return axis->default_value + r * (axis->default_value - axis->min_value);
else
return axis->default_value + r * (axis->max_value - axis->default_value);
}
static void
get_axes_and_values (hb_font_t *font,
unsigned int n_axes,
hb_ot_var_axis_info_t *axes,
float *coords)
{
const int *ncoords;
unsigned int length = n_axes;
hb_ot_var_get_axis_infos (hb_font_get_face (font), 0, &length, axes);
ncoords = hb_font_get_var_coords_normalized (font, &length);
for (int i = 0; i < n_axes; i++)
{
hb_ot_var_axis_info_t *axis = &axes[i];
int idx = axis->axis_index;
if (ncoords)
coords[idx] = denorm_coord (axis, ncoords[idx]);
else
coords[idx] = axis->default_value;
}
}
#endif
static gboolean
gtk_font_chooser_widget_update_font_variations (GtkFontChooserWidget *fontchooser)
{
PangoFont *pango_font;
hb_font_t *hb_font;
hb_face_t *hb_face;
unsigned int n_axes;
hb_ot_var_axis_info_t *axes;
float *coords;
gboolean has_axis = FALSE;
int i;
if (fontchooser->updating_variations)
return FALSE;
g_hash_table_foreach (fontchooser->axes, axis_remove, fontchooser);
g_hash_table_remove_all (fontchooser->axes);
if ((fontchooser->level & GTK_FONT_CHOOSER_LEVEL_VARIATIONS) == 0)
return FALSE;
pango_font = pango_context_load_font (gtk_widget_get_pango_context (GTK_WIDGET (fontchooser)),
fontchooser->font_desc);
hb_font = pango_font_get_hb_font (pango_font);
hb_face = hb_font_get_face (hb_font);
if (!hb_ot_var_has_data (hb_face))
return FALSE;
n_axes = hb_ot_var_get_axis_count (hb_face);
axes = g_alloca (sizeof (hb_ot_var_axis_info_t) * n_axes);
coords = g_alloca (sizeof (float) * n_axes);
get_axes_and_values (hb_font, n_axes, axes, coords);
for (i = 0; i < n_axes; i++)
{
if (add_axis (fontchooser, hb_font, &axes[i], coords[axes[i].axis_index], i + 4))
has_axis = TRUE;
}
g_object_unref (pango_font);
return has_axis;
}
/* OpenType features */
/* look for a lang / script combination that matches the
* language property and is supported by the hb_face. If
* none is found, return the default lang / script tags.
*/
static void
find_language_and_script (GtkFontChooserWidget *fontchooser,
hb_face_t *hb_face,
hb_tag_t *lang_tag,
hb_tag_t *script_tag)
{
int i, j, k;
hb_tag_t scripts[80];
unsigned int n_scripts;
unsigned int count;
hb_tag_t table[2] = { HB_OT_TAG_GSUB, HB_OT_TAG_GPOS };
hb_language_t lang;
const char *langname, *p;
langname = pango_language_to_string (fontchooser->language);
p = strchr (langname, '-');
lang = hb_language_from_string (langname, p ? p - langname : -1);
n_scripts = 0;
for (i = 0; i < 2; i++)
{
count = G_N_ELEMENTS (scripts);
hb_ot_layout_table_get_script_tags (hb_face, table[i], n_scripts, &count, scripts);
n_scripts += count;
}
for (j = 0; j < n_scripts; j++)
{
hb_tag_t languages[80];
unsigned int n_languages;
n_languages = 0;
for (i = 0; i < 2; i++)
{
count = G_N_ELEMENTS (languages);
hb_ot_layout_script_get_language_tags (hb_face, table[i], j, n_languages, &count, languages);
n_languages += count;
}
for (k = 0; k < n_languages; k++)
{
if (lang == hb_ot_tag_to_language (languages[k]))
{
*script_tag = scripts[j];
*lang_tag = languages[k];
return;
}
}
}
*lang_tag = HB_OT_TAG_DEFAULT_LANGUAGE;
*script_tag = HB_OT_TAG_DEFAULT_SCRIPT;
}
typedef struct {
hb_tag_t tag;
const char *name;
GtkWidget *top;
GtkWidget *feat;
GtkWidget *example;
} FeatureItem;
static const char *
get_feature_display_name (hb_tag_t tag)
{
int i;
for (i = 0; i < G_N_ELEMENTS (open_type_layout_features); i++)
{
if (tag == open_type_layout_features[i].tag)
return g_dpgettext2 (NULL, "OpenType layout", open_type_layout_features[i].name);
}
return NULL;
}
static void
set_inconsistent (GtkCheckButton *button,
gboolean inconsistent)
{
gtk_check_button_set_inconsistent (GTK_CHECK_BUTTON (button), inconsistent);
gtk_widget_set_opacity (gtk_widget_get_first_child (GTK_WIDGET (button)), inconsistent ? 0.0 : 1.0);
}
static void
feat_pressed (GtkGestureClick *gesture,
int n_press,
double x,
double y,
GtkWidget *feat)
{
const guint button = gtk_gesture_single_get_current_button (GTK_GESTURE_SINGLE (gesture));
if (button == GDK_BUTTON_PRIMARY)
{
g_signal_handlers_block_by_func (feat, feat_pressed, NULL);
if (gtk_check_button_get_inconsistent (GTK_CHECK_BUTTON (feat)))
{
set_inconsistent (GTK_CHECK_BUTTON (feat), FALSE);
gtk_check_button_set_active (GTK_CHECK_BUTTON (feat), TRUE);
}
g_signal_handlers_unblock_by_func (feat, feat_pressed, NULL);
}
else if (button == GDK_BUTTON_SECONDARY)
{
gboolean inconsistent = gtk_check_button_get_inconsistent (GTK_CHECK_BUTTON (feat));
set_inconsistent (GTK_CHECK_BUTTON (feat), !inconsistent);
}
}
static char *
find_affected_text (GtkFontChooserWidget *fontchooser,
hb_tag_t feature_tag,
hb_font_t *hb_font,
hb_tag_t script_tag,
hb_tag_t lang_tag,
int max_chars)
{
hb_face_t *hb_face;
unsigned int script_index = 0;
unsigned int lang_index = 0;
unsigned int feature_index = 0;
GString *chars;
hb_face = hb_font_get_face (hb_font);
chars = g_string_new ("");
hb_ot_layout_table_find_script (hb_face, HB_OT_TAG_GSUB, script_tag, &script_index);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
hb_ot_layout_script_find_language (hb_face, HB_OT_TAG_GSUB, script_index, lang_tag, &lang_index);
G_GNUC_END_IGNORE_DEPRECATIONS
if (hb_ot_layout_language_find_feature (hb_face, HB_OT_TAG_GSUB, script_index, lang_index, feature_tag, &feature_index))
{
unsigned int lookup_indexes[32];
unsigned int lookup_count = 32;
int count;
int n_chars = 0;
count = hb_ot_layout_feature_get_lookups (hb_face,
HB_OT_TAG_GSUB,
feature_index,
0,
&lookup_count,
lookup_indexes);
if (count > 0)
{
hb_set_t* glyphs_before = NULL;
hb_set_t* glyphs_input = NULL;
hb_set_t* glyphs_after = NULL;
hb_set_t* glyphs_output = NULL;
hb_codepoint_t gid;
glyphs_input = hb_set_create ();
// XXX For now, just look at first index
hb_ot_layout_lookup_collect_glyphs (hb_face,
HB_OT_TAG_GSUB,
lookup_indexes[0],
glyphs_before,
glyphs_input,
glyphs_after,
glyphs_output);
if (!fontchooser->glyphmap)
{
fontchooser->glyphmap = hb_map_create ();
for (hb_codepoint_t ch = 0; ch < 0xffff; ch++)
{
hb_codepoint_t glyph = 0;
if (hb_font_get_nominal_glyph (hb_font, ch, &glyph) &&
!hb_map_has (fontchooser->glyphmap, glyph))
hb_map_set (fontchooser->glyphmap, glyph, ch);
}
}
while (hb_set_next (glyphs_input, &gid))
{
hb_codepoint_t ch;
if (n_chars == max_chars)
{
g_string_append (chars, "…");
break;
}
ch = hb_map_get (fontchooser->glyphmap, gid);
if (ch != HB_MAP_VALUE_INVALID)
{
g_string_append_unichar (chars, (gunichar)ch);
n_chars++;
}
}
hb_set_destroy (glyphs_input);
}
}
return g_string_free (chars, FALSE);
}
static void
update_feature_example (GtkFontChooserWidget *fontchooser,
FeatureItem *item,
hb_font_t *hb_font,
hb_tag_t script_tag,
hb_tag_t lang_tag,
PangoFontDescription *font_desc)
{
const char *letter_case[] = { "smcp", "c2sc", "pcap", "c2pc", "unic", "cpsp", "case", NULL };
const char *number_case[] = { "xxxx", "lnum", "onum", NULL };
const char *number_spacing[] = { "xxxx", "pnum", "tnum", NULL };
const char *number_formatting[] = { "zero", "nalt", "frac", NULL };
const char *char_variants[] = {
"swsh", "cswh", "calt", "falt", "hist", "salt", "jalt", "titl", "rand",
"ss01", "ss02", "ss03", "ss04", "ss05", "ss06", "ss07", "ss08", "ss09", "ss10",
"ss11", "ss12", "ss13", "ss14", "ss15", "ss16", "ss17", "ss18", "ss19", "ss20",
NULL };
if (g_strv_contains (number_case, item->name) ||
g_strv_contains (number_spacing, item->name))
{
PangoAttrList *attrs;
PangoAttribute *attr;
PangoFontDescription *desc;
char *str;
attrs = pango_attr_list_new ();
desc = pango_font_description_copy (font_desc);
pango_font_description_unset_fields (desc, PANGO_FONT_MASK_SIZE);
pango_attr_list_insert (attrs, pango_attr_font_desc_new (desc));
pango_font_description_free (desc);
str = g_strconcat (item->name, " 1", NULL);
attr = pango_attr_font_features_new (str);
pango_attr_list_insert (attrs, attr);
gtk_label_set_text (GTK_LABEL (item->example), "0123456789");
gtk_label_set_attributes (GTK_LABEL (item->example), attrs);
pango_attr_list_unref (attrs);
}
else if (g_strv_contains (letter_case, item->name) ||
g_strv_contains (number_formatting, item->name) ||
g_strv_contains (char_variants, item->name))
{
char *input = NULL;
char *text;
if (strcmp (item->name, "case") == 0)
input = g_strdup ("A-B[Cq]");
else if (g_strv_contains (letter_case, item->name))
input = g_strdup ("AaBbCc…");
else if (strcmp (item->name, "zero") == 0)
input = g_strdup ("0");
else if (strcmp (item->name, "frac") == 0)
input = g_strdup ("1/2 2/3 7/8");
else if (strcmp (item->name, "nalt") == 0)
input = find_affected_text (fontchooser, item->tag, hb_font, script_tag, lang_tag, 3);
else
input = find_affected_text (fontchooser, item->tag, hb_font, script_tag, lang_tag, 10);
if (input[0] != '\0')
{
PangoAttrList *attrs;
PangoAttribute *attr;
PangoFontDescription *desc;
char *str;
text = g_strconcat (input, " ⟶ ", input, NULL);
attrs = pango_attr_list_new ();
desc = pango_font_description_copy (font_desc);
pango_font_description_unset_fields (desc, PANGO_FONT_MASK_SIZE);
pango_attr_list_insert (attrs, pango_attr_font_desc_new (desc));
pango_font_description_free (desc);
str = g_strconcat (item->name, " 0", NULL);
attr = pango_attr_font_features_new (str);
attr->start_index = 0;
attr->end_index = strlen (input);
pango_attr_list_insert (attrs, attr);
str = g_strconcat (item->name, " 1", NULL);
attr = pango_attr_font_features_new (str);
attr->start_index = strlen (input) + strlen (" ⟶ ");
attr->end_index = attr->start_index + strlen (input);
pango_attr_list_insert (attrs, attr);
gtk_label_set_text (GTK_LABEL (item->example), text);
gtk_label_set_attributes (GTK_LABEL (item->example), attrs);
g_free (text);
pango_attr_list_unref (attrs);
}
else
gtk_label_set_markup (GTK_LABEL (item->example), "");
g_free (input);
}
}
static void
font_feature_toggled_cb (GtkCheckButton *check_button,
gpointer user_data)
{
GtkFontChooserWidget *fontchooser = user_data;
set_inconsistent (check_button, FALSE);
update_font_features (fontchooser);
}
static void
add_check_group (GtkFontChooserWidget *fontchooser,
const char *title,
const char **tags)
{
GtkWidget *label;
GtkWidget *group;
PangoAttrList *attrs;
int i;
group = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_widget_set_halign (group, GTK_ALIGN_FILL);
label = gtk_label_new (title);
gtk_label_set_xalign (GTK_LABEL (label), 0.0);
gtk_widget_set_halign (label, GTK_ALIGN_START);
g_object_set (label, "margin-top", 10, "margin-bottom", 10, NULL);
attrs = pango_attr_list_new ();
pango_attr_list_insert (attrs, pango_attr_weight_new (PANGO_WEIGHT_BOLD));
gtk_label_set_attributes (GTK_LABEL (label), attrs);
pango_attr_list_unref (attrs);
gtk_box_append (GTK_BOX (group), label);
for (i = 0; tags[i]; i++)
{
hb_tag_t tag;
GtkWidget *feat;
FeatureItem *item;
GtkGesture *gesture;
GtkWidget *box;
GtkWidget *example;
tag = hb_tag_from_string (tags[i], -1);
feat = gtk_check_button_new_with_label (get_feature_display_name (tag));
set_inconsistent (GTK_CHECK_BUTTON (feat), TRUE);
g_signal_connect (feat, "toggled", G_CALLBACK (font_feature_toggled_cb), fontchooser);
g_signal_connect_swapped (feat, "notify::inconsistent", G_CALLBACK (update_font_features), fontchooser);
gesture = gtk_gesture_click_new ();
gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (gesture), GDK_BUTTON_SECONDARY);
g_signal_connect (gesture, "pressed", G_CALLBACK (feat_pressed), feat);
gtk_widget_add_controller (feat, GTK_EVENT_CONTROLLER (gesture));
example = gtk_label_new ("");
gtk_label_set_selectable (GTK_LABEL (example), TRUE);
gtk_widget_set_halign (example, GTK_ALIGN_START);
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10);
gtk_box_set_homogeneous (GTK_BOX (box), TRUE);
gtk_box_append (GTK_BOX (box), feat);
gtk_box_append (GTK_BOX (box), example);
gtk_box_append (GTK_BOX (group), box);
item = g_new (FeatureItem, 1);
item->name = tags[i];
item->tag = tag;
item->top = box;
item->feat = feat;
item->example = example;
fontchooser->feature_items = g_list_prepend (fontchooser->feature_items, item);
}
gtk_box_append (GTK_BOX (fontchooser->feature_box), group);
}
static void
add_radio_group (GtkFontChooserWidget *fontchooser,
const char *title,
const char **tags)
{
GtkWidget *label;
GtkWidget *group;
int i;
GtkWidget *group_button = NULL;
PangoAttrList *attrs;
group = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_widget_set_halign (group, GTK_ALIGN_FILL);
label = gtk_label_new (title);
gtk_label_set_xalign (GTK_LABEL (label), 0.0);
gtk_widget_set_halign (label, GTK_ALIGN_START);
g_object_set (label, "margin-top", 10, "margin-bottom", 10, NULL);
attrs = pango_attr_list_new ();
pango_attr_list_insert (attrs, pango_attr_weight_new (PANGO_WEIGHT_BOLD));
gtk_label_set_attributes (GTK_LABEL (label), attrs);
pango_attr_list_unref (attrs);
gtk_box_append (GTK_BOX (group), label);
for (i = 0; tags[i]; i++)
{
hb_tag_t tag;
GtkWidget *feat;
FeatureItem *item;
const char *name;
GtkWidget *box;
GtkWidget *example;
tag = hb_tag_from_string (tags[i], -1);
name = get_feature_display_name (tag);
feat = gtk_check_button_new_with_label (name ? name : _("Default"));
if (group_button == NULL)
group_button = feat;
else
gtk_check_button_set_group (GTK_CHECK_BUTTON (feat), GTK_CHECK_BUTTON (group_button));
g_signal_connect_swapped (feat, "notify::active", G_CALLBACK (update_font_features), fontchooser);
g_object_set_data (G_OBJECT (feat), "default", group_button);
example = gtk_label_new ("");
gtk_label_set_selectable (GTK_LABEL (example), TRUE);
gtk_widget_set_halign (example, GTK_ALIGN_START);
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10);
gtk_box_set_homogeneous (GTK_BOX (box), TRUE);
gtk_box_append (GTK_BOX (box), feat);
gtk_box_append (GTK_BOX (box), example);
gtk_box_append (GTK_BOX (group), box);
item = g_new (FeatureItem, 1);
item->name = tags[i];
item->tag = tag;
item->top = box;
item->feat = feat;
item->example = example;
fontchooser->feature_items = g_list_prepend (fontchooser->feature_items, item);
}
gtk_box_append (GTK_BOX (fontchooser->feature_box), group);
}
static void
gtk_font_chooser_widget_populate_features (GtkFontChooserWidget *fontchooser)
{
const char *ligatures[] = { "liga", "dlig", "hlig", "clig", NULL };
const char *letter_case[] = { "smcp", "c2sc", "pcap", "c2pc", "unic", "cpsp", "case", NULL };
const char *number_case[] = { "xxxx", "lnum", "onum", NULL };
const char *number_spacing[] = { "xxxx", "pnum", "tnum", NULL };
const char *number_formatting[] = { "zero", "nalt", "frac", NULL };
const char *char_variants[] = {
"swsh", "cswh", "calt", "falt", "hist", "salt", "jalt", "titl", "rand",
"ss01", "ss02", "ss03", "ss04", "ss05", "ss06", "ss07", "ss08", "ss09", "ss10",
"ss11", "ss12", "ss13", "ss14", "ss15", "ss16", "ss17", "ss18", "ss19", "ss20",
NULL };
add_check_group (fontchooser, _("Ligatures"), ligatures);
add_check_group (fontchooser, _("Letter Case"), letter_case);
add_radio_group (fontchooser, _("Number Case"), number_case);
add_radio_group (fontchooser, _("Number Spacing"), number_spacing);
add_check_group (fontchooser, _("Number Formatting"), number_formatting);
add_check_group (fontchooser, _("Character Variants"), char_variants);
update_font_features (fontchooser);
}
static gboolean
gtk_font_chooser_widget_update_font_features (GtkFontChooserWidget *fontchooser)
{
PangoFont *pango_font;
hb_font_t *hb_font;
hb_tag_t script_tag;
hb_tag_t lang_tag;
guint script_index = 0;
guint lang_index = 0;
int i, j;
GList *l;
gboolean has_feature = FALSE;
for (l = fontchooser->feature_items; l; l = l->next)
{
FeatureItem *item = l->data;
gtk_widget_hide (item->top);
gtk_widget_hide (gtk_widget_get_parent (item->top));
}
if ((fontchooser->level & GTK_FONT_CHOOSER_LEVEL_FEATURES) == 0)
return FALSE;
pango_font = pango_context_load_font (gtk_widget_get_pango_context (GTK_WIDGET (fontchooser)),
fontchooser->font_desc);
hb_font = pango_font_get_hb_font (pango_font);
if (hb_font)
{
hb_tag_t table[2] = { HB_OT_TAG_GSUB, HB_OT_TAG_GPOS };
hb_face_t *hb_face;
hb_tag_t features[80];
unsigned int count;
unsigned int n_features;
hb_face = hb_font_get_face (hb_font);
find_language_and_script (fontchooser, hb_face, &lang_tag, &script_tag);
n_features = 0;
for (i = 0; i < 2; i++)
{
hb_ot_layout_table_find_script (hb_face, table[i], script_tag, &script_index);
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
hb_ot_layout_script_find_language (hb_face, table[i], script_index, lang_tag, &lang_index);
G_GNUC_END_IGNORE_DEPRECATIONS
count = G_N_ELEMENTS (features);
hb_ot_layout_language_get_feature_tags (hb_face,
table[i],
script_index,
lang_index,
n_features,
&count,
features);
n_features += count;
}
for (j = 0; j < n_features; j++)
{
for (l = fontchooser->feature_items; l; l = l->next)
{
FeatureItem *item = l->data;
if (item->tag != features[j])
continue;
has_feature = TRUE;
gtk_widget_show (item->top);
gtk_widget_show (gtk_widget_get_parent (item->top));
update_feature_example (fontchooser, item, hb_font, script_tag, lang_tag, fontchooser->font_desc);
if (GTK_IS_CHECK_BUTTON (item->feat))
{
GtkWidget *def = GTK_WIDGET (g_object_get_data (G_OBJECT (item->feat), "default"));
if (def)
{
gtk_widget_show (def);
gtk_widget_show (gtk_widget_get_parent (def));
gtk_check_button_set_active (GTK_CHECK_BUTTON (def), TRUE);
}
else
set_inconsistent (GTK_CHECK_BUTTON (item->feat), TRUE);
}
}
}
if (fontchooser->glyphmap)
{
hb_map_destroy (fontchooser->glyphmap);
fontchooser->glyphmap = NULL;
}
}
g_object_unref (pango_font);
return has_feature;
}
static void
update_font_features (GtkFontChooserWidget *fontchooser)
{
GString *s;
GList *l;
char buf[128];
s = g_string_new ("");
for (l = fontchooser->feature_items; l; l = l->next)
{
FeatureItem *item = l->data;
if (!gtk_widget_is_sensitive (item->feat))
continue;
if (GTK_IS_CHECK_BUTTON (item->feat) && g_object_get_data (G_OBJECT (item->feat), "default"))
{
if (gtk_check_button_get_active (GTK_CHECK_BUTTON (item->feat)) &&
strcmp (item->name, "xxxx") != 0)
{
hb_feature_to_string (&(hb_feature_t) { item->tag, 1, 0, -1 }, buf, sizeof (buf));
if (s->len > 0)
g_string_append_c (s, ',');
g_string_append (s, buf);
}
}
else if (GTK_IS_CHECK_BUTTON (item->feat))
{
guint32 value;
if (gtk_check_button_get_inconsistent (GTK_CHECK_BUTTON (item->feat)))
continue;
value = gtk_check_button_get_active (GTK_CHECK_BUTTON (item->feat));
hb_feature_to_string (&(hb_feature_t) { item->tag, value, 0, -1 }, buf, sizeof (buf));
if (s->len > 0)
g_string_append_c (s, ',');
g_string_append (s, buf);
}
}
if (g_strcmp0 (fontchooser->font_features, s->str) != 0)
{
g_free (fontchooser->font_features);
fontchooser->font_features = g_string_free (s, FALSE);
g_object_notify (G_OBJECT (fontchooser), "font-features");
}
else
g_string_free (s, TRUE);
gtk_font_chooser_widget_update_preview_attributes (fontchooser);
}
static void
gtk_font_chooser_widget_merge_font_desc (GtkFontChooserWidget *fontchooser,
const PangoFontDescription *font_desc)
{
PangoFontMask mask;
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, fontchooser->font_desc))
return;
pango_font_description_merge (fontchooser->font_desc, font_desc, TRUE);
if (mask & PANGO_FONT_MASK_SIZE)
{
double font_size = (double) pango_font_description_get_size (fontchooser->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 (fontchooser->size_slider), font_size);
gtk_spin_button_set_value (GTK_SPIN_BUTTON (fontchooser->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))
{
gboolean has_tweak = FALSE;
gtk_font_chooser_widget_update_marks (fontchooser);
if (gtk_font_chooser_widget_update_font_features (fontchooser))
has_tweak = TRUE;
if (gtk_font_chooser_widget_update_font_variations (fontchooser))
has_tweak = TRUE;
g_simple_action_set_enabled (G_SIMPLE_ACTION (fontchooser->tweak_action), has_tweak);
}
if (mask & PANGO_FONT_MASK_VARIATIONS)
{
if (pango_font_description_get_variations (fontchooser->font_desc)[0] == '\0')
pango_font_description_unset_fields (fontchooser->font_desc, PANGO_FONT_MASK_VARIANT);
}
gtk_font_chooser_widget_update_preview_attributes (fontchooser);
g_object_notify (G_OBJECT (fontchooser), "font");
g_object_notify (G_OBJECT (fontchooser), "font-desc");
}
static void
gtk_font_chooser_widget_take_font_desc (GtkFontChooserWidget *fontchooser,
PangoFontDescription *font_desc)
{
PangoFontMask mask;
if (font_desc == NULL)
font_desc = pango_font_description_from_string (GTK_FONT_CHOOSER_DEFAULT_FONT_NAME);
mask = pango_font_description_get_set_fields (font_desc);
gtk_font_chooser_widget_merge_font_desc (fontchooser, font_desc);
if (mask & (PANGO_FONT_MASK_FAMILY | PANGO_FONT_MASK_STYLE | PANGO_FONT_MASK_VARIANT |
PANGO_FONT_MASK_WEIGHT | PANGO_FONT_MASK_STRETCH))
{
gtk_single_selection_set_selected (fontchooser->selection, GTK_INVALID_LIST_POSITION);
gtk_font_chooser_widget_ensure_matching_selection (fontchooser);
}
pango_font_description_free (font_desc);
}
static const char *
gtk_font_chooser_widget_get_preview_text (GtkFontChooserWidget *fontchooser)
{
return fontchooser->preview_text;
}
static void
gtk_font_chooser_widget_set_preview_text (GtkFontChooserWidget *fontchooser,
const char *text)
{
if (fontchooser->preview_text == text)
return;
g_free (fontchooser->preview_text);
fontchooser->preview_text = g_strdup (text);
gtk_editable_set_text (GTK_EDITABLE (fontchooser->preview), text);
g_object_notify (G_OBJECT (fontchooser), "preview-text");
}
static gboolean
gtk_font_chooser_widget_get_show_preview_entry (GtkFontChooserWidget *fontchooser)
{
return fontchooser->show_preview_entry;
}
static void
gtk_font_chooser_widget_set_show_preview_entry (GtkFontChooserWidget *fontchooser,
gboolean show_preview_entry)
{
if (fontchooser->show_preview_entry != show_preview_entry)
{
fontchooser->show_preview_entry = show_preview_entry;
if (show_preview_entry)
gtk_widget_show (fontchooser->preview);
else
gtk_widget_hide (fontchooser->preview);
g_object_notify (G_OBJECT (fontchooser), "show-preview-entry");
}
}
static void
gtk_font_chooser_widget_set_font_map (GtkFontChooser *chooser,
PangoFontMap *fontmap)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
if (g_set_object (&fontchooser->font_map, fontmap))
{
PangoContext *context;
if (!fontmap)
fontmap = pango_cairo_font_map_get_default ();
context = gtk_widget_get_pango_context (fontchooser->family_face_list);
pango_context_set_font_map (context, fontmap);
context = gtk_widget_get_pango_context (fontchooser->preview);
pango_context_set_font_map (context, fontmap);
update_fontlist (fontchooser);
}
}
static PangoFontMap *
gtk_font_chooser_widget_get_font_map (GtkFontChooser *chooser)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
return fontchooser->font_map;
}
static gboolean
gtk_font_chooser_widget_filter_cb (gpointer item,
gpointer data)
{
GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (data);
PangoFontFamily *family;
PangoFontFace *face;
if (PANGO_IS_FONT_FAMILY (item))
{
family = item;
face = pango_font_family_get_face (family, NULL);
}
else
{
face = item;
family = pango_font_face_get_family (face);
}
return self->filter_func (family, face, self->filter_data);
}
static void
gtk_font_chooser_widget_set_filter_func (GtkFontChooser *chooser,
GtkFontFilterFunc filter,
gpointer data,
GDestroyNotify destroy)
{
GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (chooser);
if (self->filter_data_destroy)
self->filter_data_destroy (self->filter_data);
self->filter_func = filter;
self->filter_data = data;
self->filter_data_destroy = destroy;
if (filter)
{
gtk_custom_filter_set_filter_func (self->custom_filter,
gtk_font_chooser_widget_filter_cb,
self,
NULL);
}
else
{
gtk_custom_filter_set_filter_func (self->custom_filter, NULL, NULL, NULL);
}
}
static void
gtk_font_chooser_widget_set_level (GtkFontChooserWidget *fontchooser,
GtkFontChooserLevel level)
{
if (fontchooser->level == level)
return;
fontchooser->level = level;
if ((level & GTK_FONT_CHOOSER_LEVEL_SIZE) != 0)
{
gtk_widget_show (fontchooser->size_label);
gtk_widget_show (fontchooser->size_slider);
gtk_widget_show (fontchooser->size_spin);
}
else
{
gtk_widget_hide (fontchooser->size_label);
gtk_widget_hide (fontchooser->size_slider);
gtk_widget_hide (fontchooser->size_spin);
}
update_fontlist (fontchooser);
g_object_notify (G_OBJECT (fontchooser), "level");
}
static GtkFontChooserLevel
gtk_font_chooser_widget_get_level (GtkFontChooserWidget *fontchooser)
{
return fontchooser->level;
}
static void
gtk_font_chooser_widget_set_language (GtkFontChooserWidget *fontchooser,
const char *language)
{
PangoLanguage *lang;
lang = pango_language_from_string (language);
if (fontchooser->language == lang)
return;
fontchooser->language = lang;
g_object_notify (G_OBJECT (fontchooser), "language");
gtk_font_chooser_widget_update_preview_attributes (fontchooser);
}
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;
iface->set_font_map = gtk_font_chooser_widget_set_font_map;
iface->get_font_map = gtk_font_chooser_widget_get_font_map;
}
GAction *
gtk_font_chooser_widget_get_tweak_action (GtkWidget *widget)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (widget);
return fontchooser->tweak_action;
}
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