AuroraMiddleware/gtk2
1
0
Fork 0
forked from AuroraMiddleware/gtk
Code Issues Pull Requests Projects Releases Wiki Activity
720e335246
gtk2/gtk/gtkfontchooserwidget.c
Chun-wei Fan e1422d73b1 gtkfontchooserwidget.c: Always enable font features with later Pango 
This is a backport of the code in GTK4 where we can use the font
features that is given to us via HarfBuzz if we have Pango 1.44.x and
HarfBuzz 2.2.0 or later installed, even if we do not have PangoFT2
aavilable.

Since Pango 1.44.x depends on HarfBuzz for all platforms after 1.44.0,
we could take advantage of that and build the support in
GtkFontChooserWidget.

Add a directive that is to be used by Visual Studio compilers via the
Visual Studio projects to link to harfbuzz.lib automatically, so that
this support can be linked properly if we have the required Pango and
HarfBuzz headers and lib's installed.  Meson builds via Visual Studio
should handle this automatically, since pkg-config is being used there.

Since HAVE_PANGOFT2 and HAVE_HARFBUZZ is not defined by default in the
Visaul Studio projects, we will leave it up to the user to enable them
themselves and put in pangoft2-1.0.lib and harfbuzz.lib in the project
settings by themselves, or they could use Meson, as we did before.
2021-11-29 12:25:52 +08:00

2801 lines
89 KiB
C
Raw Blame History

/* 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 <atk/atk.h>
#include "gtkfontchooserwidget.h"
#include "gtkfontchooserwidgetprivate.h"
#include "gtkadjustment.h"
#include "gtkbuildable.h"
#include "gtkbox.h"
#include "gtkcellrenderertext.h"
#include "gtkentry.h"
#include "gtksearchentry.h"
#include "gtkgrid.h"
#include "gtkfontchooser.h"
#include "gtkfontchooserutils.h"
#include "gtkintl.h"
#include "gtklabel.h"
#include "gtkliststore.h"
#include "gtkstack.h"
#include "gtkprivate.h"
#include "gtkscale.h"
#include "gtkscrolledwindow.h"
#include "gtkspinbutton.h"
#include "gtktextview.h"
#include "gtktreeselection.h"
#include "gtktreeview.h"
#include "gtkwidget.h"
#include "gtksettings.h"
#include "gtkdialog.h"
#include "gtkradiobutton.h"
#include "gtkcombobox.h"
#include "gtkgesturemultipress.h"
#if (PANGO_VERSION_CHECK(1,44,0) && HB_VERSION_ATLEAST(2,2,0)) || \
(defined(HAVE_HARFBUZZ) && defined(HAVE_PANGOFT))
#define HAVE_FONT_FEATURES 1
#if !(PANGO_VERSION_CHECK(1,44,0) && HB_VERSION_ATLEAST(2,2,0))
#define FONT_FEATURES_USE_PANGOFT2 1
#endif
#endif
#ifdef FONT_FEATURES_USE_PANGOFT2
#include <pango/pangofc-font.h>
#include <hb.h>
#include <hb-ot.h>
#include <hb-ft.h>
#include <freetype/freetype.h>
#include <freetype/ftmm.h>
#include "language-names.h"
#include "script-names.h"
#elif defined (HAVE_FONT_FEATURES)
#include <hb-ot.h>
#if defined (_MSC_VER) && defined (__MSVC_PROJECTS__)
#pragma comment(lib, "harfbuzz")
#endif
#endif
#include "open-type-layout.h"
/**
* SECTION:gtkfontchooserwidget
* @Short_description: A widget for selecting fonts
* @Title: GtkFontChooserWidget
* @See_also: #GtkFontChooserDialog
*
* The #GtkFontChooserWidget widget lists the available fonts,
* styles and sizes, allowing the user to select a font. It is
* used in the #GtkFontChooserDialog widget to provide a
* dialog box for selecting fonts.
*
* To set the font which is initially selected, use
* gtk_font_chooser_set_font() or gtk_font_chooser_set_font_desc().
*
* To get the selected font use gtk_font_chooser_get_font() or
* gtk_font_chooser_get_font_desc().
*
* To change the text which is shown in the preview area, use
* gtk_font_chooser_set_preview_text().
*
* # CSS nodes
*
* GtkFontChooserWidget has a single CSS node with name fontchooser.
*
* Since: 3.2
*/
struct _GtkFontChooserWidgetPrivate
{
GtkWidget *stack;
GtkWidget *search_entry;
GtkWidget *family_face_list;
GtkTreeViewColumn *family_face_column;
GtkCellRenderer *family_face_cell;
GtkWidget *list_scrolled_window;
GtkWidget *list_stack;
GtkTreeModel *model;
GtkTreeModel *filter_model;
GtkWidget *preview;
GtkWidget *preview2;
GtkWidget *font_name_label;
gchar *preview_text;
gboolean show_preview_entry;
GtkWidget *size_label;
GtkWidget *size_spin;
GtkWidget *size_slider;
GtkWidget *size_slider2;
GtkWidget *axis_grid;
GtkWidget *feature_box;
PangoFontMap *font_map;
PangoFontDescription *font_desc;
char *font_features;
PangoLanguage *language;
GtkTreeIter font_iter; /* invalid if font not available or pointer into model
(not filter_model) to the row containing font */
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;
};
/* 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
enum {
PROP_ZERO,
PROP_TWEAK_ACTION
};
/* Keep in line with GtkTreeStore defined in gtkfontchooserwidget.ui */
enum {
FAMILY_COLUMN,
FACE_COLUMN,
FONT_DESC_COLUMN,
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);
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);
static gchar *gtk_font_chooser_widget_get_font (GtkFontChooserWidget *fontchooser);
static void gtk_font_chooser_widget_set_font (GtkFontChooserWidget *fontchooser,
const gchar *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,
GtkTreeIter *iter);
static void gtk_font_chooser_widget_take_font_desc (GtkFontChooserWidget *fontchooser,
PangoFontDescription *font_desc);
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);
static void gtk_font_chooser_widget_set_cell_size (GtkFontChooserWidget *fontchooser);
static void gtk_font_chooser_widget_load_fonts (GtkFontChooserWidget *fontchooser,
gboolean force);
static void gtk_font_chooser_widget_populate_features (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);
static void selection_changed (GtkTreeSelection *selection,
GtkFontChooserWidget *fontchooser);
static void update_font_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 selection_changed (GtkTreeSelection *selection,
GtkFontChooserWidget *fontchooser);
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_BOX,
G_ADD_PRIVATE (GtkFontChooserWidget)
G_IMPLEMENT_INTERFACE (GTK_TYPE_FONT_CHOOSER,
gtk_font_chooser_widget_iface_init))
typedef struct _GtkDelayedFontDescription GtkDelayedFontDescription;
struct _GtkDelayedFontDescription {
PangoFontFace *face;
PangoFontDescription *desc;
guint ref_count;
};
static GtkDelayedFontDescription *
gtk_delayed_font_description_new (PangoFontFace *face)
{
GtkDelayedFontDescription *result;
result = g_slice_new0 (GtkDelayedFontDescription);
result->face = g_object_ref (face);
result->desc = NULL;
result->ref_count = 1;
return result;
}
static GtkDelayedFontDescription *
gtk_delayed_font_description_ref (GtkDelayedFontDescription *desc)
{
desc->ref_count++;
return desc;
}
static void
gtk_delayed_font_description_unref (GtkDelayedFontDescription *desc)
{
desc->ref_count--;
if (desc->ref_count > 0)
return;
g_object_unref (desc->face);
if (desc->desc)
pango_font_description_free (desc->desc);
g_slice_free (GtkDelayedFontDescription, desc);
}
static const PangoFontDescription *
gtk_delayed_font_description_get (GtkDelayedFontDescription *desc)
{
if (desc->desc == NULL)
desc->desc = pango_font_face_describe (desc->face);
return desc->desc;
}
#define GTK_TYPE_DELAYED_FONT_DESCRIPTION (gtk_delayed_font_description_get_type ())
G_DEFINE_BOXED_TYPE (GtkDelayedFontDescription, gtk_delayed_font_description,
gtk_delayed_font_description_ref,
gtk_delayed_font_description_unref)
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));
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->priv->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->priv->font_features);
break;
case GTK_FONT_CHOOSER_PROP_LANGUAGE:
g_value_set_string (value, pango_language_to_string (fontchooser->priv->language));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
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);
}
static void
text_changed_cb (GtkEntry *entry,
GtkFontChooserWidget *fc)
{
gtk_font_chooser_widget_refilter_font_list (fc);
}
static void
stop_search_cb (GtkEntry *entry,
GtkFontChooserWidget *fc)
{
if (gtk_entry_get_text (entry)[0] != 0)
gtk_entry_set_text (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;
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
PangoFontDescription *font_desc;
gdouble size = gtk_adjustment_get_value (adjustment);
font_desc = pango_font_description_new ();
if (pango_font_description_get_size_is_absolute (priv->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;
gchar *text;
gdouble value;
adjustment = gtk_spin_button_get_adjustment (spin);
value = gtk_adjustment_get_value (adjustment);
text = g_strdup_printf ("%2.4g", value);
gtk_entry_set_text (GTK_ENTRY (spin), text);
g_free (text);
return TRUE;
}
static void
gtk_font_chooser_widget_update_marks (GtkFontChooserWidget *fontchooser)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
GtkAdjustment *adj, *spin_adj;
const int *sizes;
gint *font_sizes;
gint i, n_sizes;
gdouble value, spin_value;
if (gtk_list_store_iter_is_valid (GTK_LIST_STORE (priv->model), &priv->font_iter))
{
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;
}
if (n_sizes < 2)
{
static const gint 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 (priv->size_slider));
gtk_scale_clear_marks (GTK_SCALE (priv->size_slider2));
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;
/* ensure clamping doesn't callback into font resizing code */
g_signal_handlers_block_by_func (adj, size_change_cb, fontchooser);
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, fontchooser);
for (i = 0; i < n_sizes; i++)
{
gtk_scale_add_mark (GTK_SCALE (priv->size_slider),
sizes[i],
GTK_POS_BOTTOM, NULL);
gtk_scale_add_mark (GTK_SCALE (priv->size_slider2),
sizes[i],
GTK_POS_BOTTOM, NULL);
}
g_free (font_sizes);
}
static void
row_activated_cb (GtkTreeView *view,
GtkTreePath *path,
GtkTreeViewColumn *column,
gpointer user_data)
{
GtkFontChooserWidget *fontchooser = user_data;
gchar *fontname;
fontname = gtk_font_chooser_widget_get_font (fontchooser);
_gtk_font_chooser_font_activated (GTK_FONT_CHOOSER (fontchooser), fontname);
g_free (fontname);
}
static void
cursor_changed_cb (GtkTreeView *treeview,
gpointer user_data)
{
GtkFontChooserWidget *fontchooser = user_data;
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
GtkDelayedFontDescription *desc;
GtkTreeIter filter_iter, iter;
GtkTreePath *path = NULL;
gtk_tree_view_get_cursor (treeview, &path, NULL);
if (!path)
return;
if (!gtk_tree_model_get_iter (priv->filter_model, &filter_iter, path))
{
gtk_tree_path_free (path);
return;
}
gtk_tree_path_free (path);
gtk_tree_model_filter_convert_iter_to_child_iter (GTK_TREE_MODEL_FILTER (priv->filter_model),
&iter,
&filter_iter);
gtk_tree_model_get (priv->model, &iter,
FONT_DESC_COLUMN, &desc,
-1);
pango_font_description_set_variations (priv->font_desc, NULL);
gtk_font_chooser_widget_merge_font_desc (fontchooser,
gtk_delayed_font_description_get (desc),
&iter);
gtk_delayed_font_description_unref (desc);
}
static gboolean
resize_by_scroll_cb (GtkWidget *scrolled_window,
GdkEventScroll *event,
gpointer user_data)
{
GtkFontChooserWidget *fc = user_data;
GtkFontChooserWidgetPrivate *priv = fc->priv;
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));
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);
return TRUE;
}
static void
gtk_font_chooser_widget_update_preview_attributes (GtkFontChooserWidget *fontchooser)
{
GtkFontChooserWidgetPrivate *priv;
PangoAttrList *attrs;
priv = fontchooser->priv;
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 (priv->font_desc));
if (priv->font_features)
pango_attr_list_insert (attrs, pango_attr_font_features_new (priv->font_features));
if (priv->language)
pango_attr_list_insert (attrs, pango_attr_language_new (priv->language));
gtk_entry_set_attributes (GTK_ENTRY (priv->preview), attrs);
pango_attr_list_unref (attrs);
}
static void
row_inserted_cb (GtkTreeModel *model,
GtkTreePath *path,
GtkTreeIter *iter,
gpointer user_data)
{
GtkFontChooserWidget *fontchooser = user_data;
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
gtk_stack_set_visible_child_name (GTK_STACK (priv->list_stack), "list");
}
static void
row_deleted_cb (GtkTreeModel *model,
GtkTreePath *path,
gpointer user_data)
{
GtkFontChooserWidget *fontchooser = user_data;
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
if (gtk_tree_model_iter_n_children (model, NULL) == 0)
gtk_stack_set_visible_child_name (GTK_STACK (priv->list_stack), "empty");
}
static void
gtk_font_chooser_widget_map (GtkWidget *widget)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (widget);
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
gtk_entry_set_text (GTK_ENTRY (priv->search_entry), "");
gtk_stack_set_visible_child_name (GTK_STACK (priv->stack), "list");
g_simple_action_set_state (G_SIMPLE_ACTION (priv->tweak_action), g_variant_new_boolean (FALSE));
GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->map (widget);
}
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 (GTK_TYPE_DELAYED_FONT_DESCRIPTION);
g_type_ensure (G_TYPE_THEMED_ICON);
widget_class->screen_changed = gtk_font_chooser_widget_screen_changed;
widget_class->map = gtk_font_chooser_widget_map;
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;
/**
* 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",
P_("The tweak action"),
P_("The toggle action to switch to the tweak page"),
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_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_stack);
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, preview2);
gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, size_label);
gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, size_spin);
gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, size_slider);
gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, size_slider2);
gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, stack);
gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, font_name_label);
gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, feature_box);
gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, axis_grid);
gtk_widget_class_bind_template_callback (widget_class, text_changed_cb);
gtk_widget_class_bind_template_callback (widget_class, stop_search_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);
gtk_widget_class_bind_template_callback (widget_class, output_cb);
gtk_widget_class_bind_template_callback (widget_class, selection_changed);
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->priv->preview2));
gtk_stack_set_visible_child_name (GTK_STACK (fontchooser->priv->stack), "tweaks");
}
else
{
gtk_entry_grab_focus_without_selecting (GTK_ENTRY (fontchooser->priv->search_entry));
gtk_stack_set_visible_child_name (GTK_STACK (fontchooser->priv->stack), "list");
}
g_simple_action_set_state (action, state);
}
#ifdef HAVE_FONT_FEATURES
typedef struct {
guint32 tag;
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)
{
Axis *a = value;
gtk_widget_destroy (a->label);
gtk_widget_destroy (a->scale);
gtk_widget_destroy (a->spin);
}
static void
axis_free (gpointer v)
{
Axis *a = v;
g_free (a);
}
#endif
static void
gtk_font_chooser_widget_init (GtkFontChooserWidget *fontchooser)
{
GtkFontChooserWidgetPrivate *priv;
fontchooser->priv = gtk_font_chooser_widget_get_instance_private (fontchooser);
priv = fontchooser->priv;
gtk_widget_init_template (GTK_WIDGET (fontchooser));
#ifdef HAVE_FONT_FEATURES
priv->axes = g_hash_table_new_full (axis_hash, axis_equal, NULL, axis_free);
#endif
/* Default preview string */
priv->preview_text = g_strdup (pango_language_get_sample_string (NULL));
priv->show_preview_entry = TRUE;
priv->font_desc = pango_font_description_new ();
priv->level = GTK_FONT_CHOOSER_LEVEL_FAMILY |
GTK_FONT_CHOOSER_LEVEL_STYLE |
GTK_FONT_CHOOSER_LEVEL_SIZE;
priv->language = pango_language_get_default ();
/* Set default preview text */
gtk_entry_set_text (GTK_ENTRY (priv->preview), priv->preview_text);
gtk_font_chooser_widget_update_preview_attributes (fontchooser);
gtk_widget_add_events (priv->preview, GDK_SCROLL_MASK);
/* Set the upper values of the spin/scale with G_MAXINT / PANGO_SCALE */
gtk_spin_button_set_range (GTK_SPIN_BUTTON (priv->size_spin),
1.0, (gdouble)(G_MAXINT / PANGO_SCALE));
gtk_adjustment_set_upper (gtk_range_get_adjustment (GTK_RANGE (priv->size_slider)),
(gdouble)(G_MAXINT / PANGO_SCALE));
/* Setup treeview/model auxilary functions */
gtk_tree_model_filter_set_visible_func (GTK_TREE_MODEL_FILTER (priv->filter_model),
visible_func, (gpointer)priv, NULL);
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);
priv->tweak_action = G_ACTION (g_simple_action_new_stateful ("tweak", NULL, g_variant_new_boolean (FALSE)));
g_signal_connect (priv->tweak_action, "change-state", G_CALLBACK (change_tweak), fontchooser);
/* Load data and set initial style-dependent parameters */
gtk_font_chooser_widget_load_fonts (fontchooser, TRUE);
#ifdef HAVE_FONT_FEATURES
gtk_font_chooser_widget_populate_features (fontchooser);
#endif
gtk_font_chooser_widget_set_cell_size (fontchooser);
gtk_font_chooser_widget_take_font_desc (fontchooser, NULL);
}
/**
* gtk_font_chooser_widget_new:
*
* Creates a new #GtkFontChooserWidget.
*
* Returns: 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
gtk_font_chooser_widget_load_fonts (GtkFontChooserWidget *fontchooser,
gboolean force)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
GtkListStore *list_store;
gint n_families, i;
PangoFontFamily **families;
guint fontconfig_timestamp;
gboolean need_reload;
PangoFontMap *font_map;
g_object_get (gtk_widget_get_settings (GTK_WIDGET (fontchooser)),
"gtk-fontconfig-timestamp", &fontconfig_timestamp,
NULL);
/* The fontconfig timestamp is only set on systems with fontconfig; every
* other platform will set it to 0. For those systems, we fall back to
* reloading the fonts every time.
*/
need_reload = fontconfig_timestamp == 0 ||
fontconfig_timestamp != priv->last_fontconfig_timestamp;
priv->last_fontconfig_timestamp = fontconfig_timestamp;
if (!need_reload && !force)
return;
list_store = GTK_LIST_STORE (priv->model);
if (priv->font_map)
font_map = priv->font_map;
else
font_map = pango_cairo_font_map_get_default ();
pango_font_map_list_families (font_map, &families, &n_families);
qsort (families, n_families, sizeof (PangoFontFamily *), cmp_families);
g_signal_handlers_block_by_func (priv->family_face_list, cursor_changed_cb, fontchooser);
gtk_list_store_clear (list_store);
g_signal_handlers_unblock_by_func (priv->family_face_list, cursor_changed_cb, fontchooser);
/* Iterate over families and faces */
for (i = 0; i < n_families; i++)
{
GtkTreeIter iter;
const gchar *fam_name = pango_font_family_get_name (families[i]);
if ((priv->level & GTK_FONT_CHOOSER_LEVEL_STYLE) == 0)
{
GtkDelayedFontDescription *desc;
PangoFontFace *face;
#if PANGO_VERSION_CHECK(1,46,0)
face = pango_font_family_get_face (families[i], NULL);
#else
{
PangoFontFace **faces;
int j, n_faces;
pango_font_family_list_faces (families[i], &faces, &n_faces);
face = faces[0];
for (j = 0; j < n_faces; j++)
{
if (strcmp (pango_font_face_get_face_name (faces[j]), "Regular") == 0)
{
face = faces[j];
break;
}
}
g_free (faces);
}
#endif
desc = gtk_delayed_font_description_new (face);
gtk_list_store_insert_with_values (list_store, &iter, -1,
FAMILY_COLUMN, families[i],
FACE_COLUMN, face,
FONT_DESC_COLUMN, desc,
PREVIEW_TITLE_COLUMN, fam_name,
-1);
gtk_delayed_font_description_unref (desc);
}
else
{
PangoFontFace **faces;
int j, n_faces;
pango_font_family_list_faces (families[i], &faces, &n_faces);
for (j = 0; j < n_faces; j++)
{
GtkDelayedFontDescription *desc;
const gchar *face_name;
char *title;
face_name = pango_font_face_get_face_name (faces[j]);
title = g_strconcat (fam_name, " ", face_name, NULL);
desc = gtk_delayed_font_description_new (faces[j]);
gtk_list_store_insert_with_values (list_store, &iter, -1,
FAMILY_COLUMN, families[i],
FACE_COLUMN, faces[j],
FONT_DESC_COLUMN, desc,
PREVIEW_TITLE_COLUMN, title,
-1);
g_free (title);
gtk_delayed_font_description_unref (desc);
}
g_free (faces);
}
}
g_free (families);
/* 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);
}
static gboolean
visible_func (GtkTreeModel *model,
GtkTreeIter *iter,
gpointer user_data)
{
GtkFontChooserWidgetPrivate *priv = user_data;
gboolean result = TRUE;
const gchar *search_text;
gchar **split_terms;
gchar *font_name, *font_name_casefold;
guint i;
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;
}
/* If there's no filter string we show the item */
search_text = gtk_entry_get_text (GTK_ENTRY (priv->search_entry));
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);
font_name_casefold = g_utf8_casefold (font_name, -1);
for (i = 0; split_terms[i] && result; i++)
{
gchar* term_casefold = g_utf8_casefold (split_terms[i], -1);
if (!strstr (font_name_casefold, term_casefold))
result = FALSE;
g_free (term_casefold);
}
g_free (font_name_casefold);
g_free (font_name);
g_strfreev (split_terms);
return result;
}
/* 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);
return (dpi < 0.0 ? 96.0 : dpi) / 72.0 * PANGO_SCALE_X_LARGE * font_size * PANGO_SCALE;
}
static PangoAttrList *
gtk_font_chooser_widget_get_preview_attributes (GtkFontChooserWidget *fontchooser,
const PangoFontDescription *font_desc)
{
PangoAttribute *attribute;
PangoAttrList *attrs;
attrs = pango_attr_list_new ();
if (font_desc)
{
attribute = pango_attr_font_desc_new (font_desc);
pango_attr_list_insert (attrs, attribute);
}
attribute = pango_attr_size_new_absolute (gtk_font_chooser_widget_get_preview_text_height (fontchooser));
pango_attr_list_insert (attrs, attribute);
return attrs;
}
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;
GtkDelayedFontDescription *desc;
PangoAttrList *attrs;
char *preview_title;
gtk_tree_model_get (tree_model, iter,
PREVIEW_TITLE_COLUMN, &preview_title,
FONT_DESC_COLUMN, &desc,
-1);
attrs = gtk_font_chooser_widget_get_preview_attributes (fontchooser,
gtk_delayed_font_description_get (desc));
g_object_set (cell,
"xpad", 20,
"ypad", 10,
"attributes", attrs,
"text", preview_title,
NULL);
gtk_delayed_font_description_unref (desc);
pango_attr_list_unref (attrs);
g_free (preview_title);
}
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);
g_object_set (priv->family_face_cell,
"xpad", 20,
"ypad", 10,
"attributes", attrs,
"text", "x",
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);
}
static void
gtk_font_chooser_widget_finalize (GObject *object)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object);
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
if (priv->font_desc)
pango_font_description_free (priv->font_desc);
if (priv->filter_data_destroy)
priv->filter_data_destroy (priv->filter_data);
g_free (priv->preview_text);
g_clear_object (&priv->font_map);
g_object_unref (priv->tweak_action);
g_list_free_full (priv->feature_items, g_free);
if (priv->axes)
g_hash_table_unref (priv->axes);
g_free (priv->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_find_font (GtkFontChooserWidget *fontchooser,
const PangoFontDescription *font_desc,
/* out arguments */
GtkTreeIter *iter)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
gboolean valid;
if (pango_font_description_get_family (font_desc) == NULL)
return FALSE;
for (valid = gtk_tree_model_get_iter_first (priv->model, iter);
valid;
valid = gtk_tree_model_iter_next (priv->model, iter))
{
GtkDelayedFontDescription *desc;
PangoFontDescription *merged;
PangoFontFamily *family;
gtk_tree_model_get (priv->model, iter,
FAMILY_COLUMN, &family,
FONT_DESC_COLUMN, &desc,
-1);
if (!my_pango_font_family_equal (pango_font_description_get_family (font_desc),
pango_font_family_get_name (family)))
{
gtk_delayed_font_description_unref (desc);
g_object_unref (family);
continue;
}
merged = pango_font_description_copy_static (gtk_delayed_font_description_get (desc));
pango_font_description_merge_static (merged, font_desc, FALSE);
if (pango_font_description_equal (merged, font_desc))
{
gtk_delayed_font_description_unref (desc);
pango_font_description_free (merged);
g_object_unref (family);
break;
}
gtk_delayed_font_description_unref (desc);
pango_font_description_free (merged);
g_object_unref (family);
}
return valid;
}
static void
fontconfig_changed (GtkFontChooserWidget *fontchooser)
{
gtk_font_chooser_widget_load_fonts (fontchooser, TRUE);
}
static void
gtk_font_chooser_widget_screen_changed (GtkWidget *widget,
GdkScreen *previous_screen)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (widget);
GtkSettings *settings;
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);
if (previous_screen)
{
settings = gtk_settings_get_for_screen (previous_screen);
g_signal_handlers_disconnect_by_func (settings, fontconfig_changed, widget);
}
settings = gtk_widget_get_settings (widget);
g_signal_connect_object (settings, "notify::gtk-fontconfig-timestamp",
G_CALLBACK (fontconfig_changed), widget, G_CONNECT_SWAPPED);
if (previous_screen == NULL)
previous_screen = gdk_screen_get_default ();
if (previous_screen == gtk_widget_get_screen (widget))
return;
gtk_font_chooser_widget_load_fonts (fontchooser, FALSE);
}
static PangoFontFamily *
gtk_font_chooser_widget_get_family (GtkFontChooser *chooser)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
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);
return family;
}
static PangoFontFace *
gtk_font_chooser_widget_get_face (GtkFontChooser *chooser)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
PangoFontFace *face;
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;
}
static gint
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 gchar *
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 *fontchooser)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
GtkTreeSelection *selection;
selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (priv->family_face_list));
if (gtk_tree_selection_count_selected_rows (selection) > 0)
return fontchooser->priv->font_desc;
return NULL;
}
static void
gtk_font_chooser_widget_set_font (GtkFontChooserWidget *fontchooser,
const gchar *fontname)
{
PangoFontDescription *font_desc;
font_desc = pango_font_description_from_string (fontname);
gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc);
}
static void
gtk_font_chooser_widget_update_font_name (GtkFontChooserWidget *fontchooser,
GtkTreeSelection *selection)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
GtkTreeModel *model;
GtkTreeIter iter;
PangoFontFamily *family;
PangoFontFace *face;
GtkDelayedFontDescription *desc;
const PangoFontDescription *font_desc;
PangoAttrList *attrs;
const char *fam_name;
const char *face_name;
char *title;
gtk_tree_selection_get_selected (selection, &model, &iter);
gtk_tree_model_get (model, &iter,
FAMILY_COLUMN, &family,
FACE_COLUMN, &face,
FONT_DESC_COLUMN, &desc,
-1);
fam_name = pango_font_family_get_name (family);
face_name = pango_font_face_get_face_name (face);
font_desc = gtk_delayed_font_description_get (desc);
g_object_unref (family);
g_object_unref (face);
gtk_delayed_font_description_unref (desc);
if (priv->level == GTK_FONT_CHOOSER_LEVEL_FAMILY)
title = g_strdup (fam_name);
else
title = g_strconcat (fam_name, " ", face_name, NULL);
attrs = gtk_font_chooser_widget_get_preview_attributes (fontchooser, font_desc);
gtk_label_set_attributes (GTK_LABEL (priv->font_name_label), attrs);
pango_attr_list_unref (attrs);
gtk_label_set_label (GTK_LABEL (priv->font_name_label), title);
g_free (title);
}
static void
selection_changed (GtkTreeSelection *selection,
GtkFontChooserWidget *fontchooser)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
g_object_notify (G_OBJECT (fontchooser), "font");
g_object_notify (G_OBJECT (fontchooser), "font-desc");
if (gtk_tree_selection_count_selected_rows (selection) > 0)
{
gtk_font_chooser_widget_update_font_name (fontchooser, selection);
g_simple_action_set_enabled (G_SIMPLE_ACTION (priv->tweak_action), TRUE);
}
else
{
g_simple_action_set_state (G_SIMPLE_ACTION (priv->tweak_action), g_variant_new_boolean (FALSE));
g_simple_action_set_enabled (G_SIMPLE_ACTION (priv->tweak_action), FALSE);
}
}
static void
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))
{
GtkTreePath *path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->filter_model),
&filter_iter);
gtk_tree_selection_select_iter (selection, &filter_iter);
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);
}
else
{
gtk_tree_selection_unselect_all (selection);
}
}
#ifdef HAVE_FONT_FEATURES
/* OpenType variations */
#define FixedToFloat(f) (((float)(f))/65536.0)
static void
add_font_variations (GtkFontChooserWidget *fontchooser,
GString *s)
{
GHashTableIter iter;
Axis *axis;
const char *sep = "";
char buf[G_ASCII_DTOSTR_BUF_SIZE];
g_hash_table_iter_init (&iter, fontchooser->priv->axes);
while (g_hash_table_iter_next (&iter, (gpointer *)NULL, (gpointer *)&axis))
{
char tag[5];
double value;
tag[0] = (axis->tag >> 24) & 0xff;
tag[1] = (axis->tag >> 16) & 0xff;
tag[2] = (axis->tag >> 8) & 0xff;
tag[3] = (axis->tag >> 0) & 0xff;
tag[4] = '\0';
value = gtk_adjustment_get_value (axis->adjustment);
g_string_append_printf (s, "%s%s=%s", sep, tag, g_ascii_dtostr (buf, sizeof(buf), value));
sep = ",";
}
}
static void
adjustment_changed (GtkAdjustment *adjustment,
Axis *axis)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (axis->fontchooser);
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
PangoFontDescription *font_desc;
GString *s;
priv->updating_variations = TRUE;
s = g_string_new ("");
add_font_variations (fontchooser, s);
if (s->len > 0)
{
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);
priv->updating_variations = FALSE;
}
#ifdef FONT_FEATURES_USE_PANGOFT2
static gboolean
should_show_axis (FT_Var_Axis *ax)
{
/* FIXME use FT_Get_Var_Axis_Flags */
if (ax->tag == FT_MAKE_TAG ('o', 'p', 's', 'z'))
return FALSE;
return TRUE;
}
static gboolean
is_named_instance (FT_Face face)
{
return (face->face_index >> 16) > 0;
}
#define TAG_WIDTH FT_MAKE_TAG ('w', 'd', 't', 'h')
#define TAG_WEIGHT FT_MAKE_TAG ('w', 'g', 'h', 't')
#define TAG_ITALIC FT_MAKE_TAG ('i', 't', 'a', 'l')
#define TAG_SLANT FT_MAKE_TAG ('s', 'l', 'n', 't')
#define TAG_OPTICAL_SIZE FT_MAKE_TAG ('o', 'p', 's', 'z')
#else
static gboolean
should_show_axis (hb_ot_var_axis_info_t *ax)
{
if (ax->flags & HB_OT_VAR_AXIS_FLAG_HIDDEN)
return FALSE;
return TRUE;
}
static gboolean
is_named_instance (hb_face_t *face)
{
/* FIXME */
return FALSE;
}
#define TAG_WIDTH HB_OT_TAG_VAR_AXIS_WIDTH
#define TAG_WEIGHT HB_OT_TAG_VAR_AXIS_WEIGHT
#define TAG_ITALIC HB_OT_TAG_VAR_AXIS_ITALIC
#define TAG_SLANT HB_OT_TAG_VAR_AXIS_SLANT
#define TAG_OPTICAL_SIZE HB_OT_TAG_VAR_AXIS_OPTICAL_SIZE
#endif
static struct {
guint32 tag;
const char *name;
} axis_names[] = {
{ TAG_WIDTH, N_("Width") },
{ TAG_WEIGHT, N_("Weight") },
{ TAG_ITALIC, N_("Italic") },
{ TAG_SLANT, N_("Slant") },
{ TAG_OPTICAL_SIZE, N_("Optical Size") },
};
#undef TAG_WIDTH
#undef TAG_WEIGHT
#undef TAG_ITALIC
#undef TAG_SLANT
#undef TAG_OPTICAL_SIZE
#ifdef FONT_FEATURES_USE_PANGOFT2
#define FONT_FACE_TYPE FT_Face
#define FONT_VAR_AXIS_TYPE FT_Var_Axis
#define FONT_VALUE_TYPE FT_Fixed
/*
* We actually don't bother about the FT_Face here, but we use this so that we can have a single
* version of add_axis() taylored to PangoFT2 or Pango with HarfBuzz integrated
*/
static void *
get_font_name (FT_Face face,
FT_Var_Axis *ax,
const char *result)
{
result = ax->name;
}
static const float
get_float_value (FT_Fixed value)
{
return FixedToFloat (value);
}
static const float
get_axis_float_max (FT_Var_Axis *ax)
{
return FixedToFloat (ax->maximum);
}
static const float
get_axis_float_min (FT_Var_Axis *ax)
{
return FixedToFloat (ax->minimum);
}
static const float
get_axis_float_default (FT_Var_Axis *ax)
{
return FixedToFloat (ax->def);
}
#else
#define FONT_FACE_TYPE hb_face_t *
#define FONT_VAR_AXIS_TYPE hb_ot_var_axis_info_t
#define FONT_VALUE_TYPE int
static void
get_font_name (hb_face_t *face,
hb_ot_var_axis_info_t *ax,
const char *name)
{
char buffer[20];
unsigned int buffer_len = 20;
hb_ot_name_get_utf8 (face, ax->name_id, HB_LANGUAGE_INVALID, &buffer_len, buffer);
name = buffer;
}
#define get_float_value(x) x
static const float
get_axis_float_max (hb_ot_var_axis_info_t *ax)
{
return ax->max_value;
}
static const float
get_axis_float_min (hb_ot_var_axis_info_t *ax)
{
return ax->min_value;
}
static const float
get_axis_float_default (hb_ot_var_axis_info_t *ax)
{
return ax->default_value;
}
/* 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);
}
#endif
static gboolean
add_axis (GtkFontChooserWidget *fontchooser,
FONT_FACE_TYPE face,
FONT_VAR_AXIS_TYPE *ax,
FONT_VALUE_TYPE value,
int row)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
Axis *axis;
const char *name;
int i;
axis = g_new (Axis, 1);
axis->tag = ax->tag;
axis->fontchooser = GTK_WIDGET (fontchooser);
get_font_name (face, ax, name);
for (i = 0; i < G_N_ELEMENTS (axis_names); i++)
{
if (axis_names[i].tag == ax->tag)
{
name = _(axis_names[i].name);
break;
}
}
axis->label = gtk_label_new (name);
gtk_widget_show (axis->label);
gtk_widget_set_halign (axis->label, GTK_ALIGN_START);
gtk_widget_set_valign (axis->label, GTK_ALIGN_BASELINE);
gtk_grid_attach (GTK_GRID (priv->axis_grid), axis->label, 0, row, 1, 1);
axis->adjustment = gtk_adjustment_new ((double)get_float_value (value),
(double)get_axis_float_min (ax),
(double)get_axis_float_max (ax),
1.0, 10.0, 0.0);
axis->scale = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, axis->adjustment);
gtk_widget_show (axis->scale);
gtk_scale_add_mark (GTK_SCALE (axis->scale), (double)get_axis_float_default (ax), 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 (priv->axis_grid), axis->scale, 1, row, 1, 1);
axis->spin = gtk_spin_button_new (axis->adjustment, 0, 0);
gtk_widget_show (axis->spin);
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 (priv->axis_grid), axis->spin, 2, row, 1, 1);
g_hash_table_add (priv->axes, axis);
adjustment_changed (axis->adjustment, axis);
g_signal_connect (axis->adjustment, "value-changed", G_CALLBACK (adjustment_changed), axis);
if (is_named_instance (face) || !should_show_axis (ax))
{
gtk_widget_hide (axis->label);
gtk_widget_hide (axis->scale);
gtk_widget_hide (axis->spin);
return FALSE;
}
return TRUE;
}
static gboolean
gtk_font_chooser_widget_update_font_variations (GtkFontChooserWidget *fontchooser)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
PangoFont *pango_font;
#ifdef FONT_FEATURES_USE_PANGOFT2
FT_Face ft_face;
FT_MM_Var *ft_mm_var;
FT_Error ret;
#else
hb_font_t *hb_font;
hb_face_t *hb_face;
const int *coords;
unsigned int n_coords;
hb_ot_var_axis_info_t *axes;
int num_axes, i;
#endif
gboolean has_axis = FALSE;
if (priv->updating_variations)
return FALSE;
g_hash_table_foreach (priv->axes, axis_remove, NULL);
g_hash_table_remove_all (priv->axes);
if ((priv->level & GTK_FONT_CHOOSER_LEVEL_VARIATIONS) == 0)
return FALSE;
pango_font = pango_context_load_font (gtk_widget_get_pango_context (GTK_WIDGET (fontchooser)),
priv->font_desc);
#ifdef FONT_FEATURES_USE_PANGOFT2
if (PANGO_IS_FC_FONT (pango_font))
{
ft_face = pango_fc_font_lock_face (PANGO_FC_FONT (pango_font));
ret = FT_Get_MM_Var (ft_face, &ft_mm_var);
if (ret == 0)
{
int i;
FT_Fixed *coords;
coords = g_new (FT_Fixed, ft_mm_var->num_axis);
for (i = 0; i < ft_mm_var->num_axis; i++)
coords[i] = ft_mm_var->axis[i].def;
if (ft_face->face_index > 0)
{
int instance_id = ft_face->face_index >> 16;
if (instance_id && instance_id <= ft_mm_var->num_namedstyles)
{
FT_Var_Named_Style *instance = &ft_mm_var->namedstyle[instance_id - 1];
memcpy (coords, instance->coords, ft_mm_var->num_axis * sizeof (*coords));
}
}
for (i = 0; i < ft_mm_var->num_axis; i++)
{
if (add_axis (fontchooser, ft_face, &ft_mm_var->axis[i], coords[i], i + 4))
has_axis = TRUE;
}
g_free (coords);
free (ft_mm_var);
}
pango_fc_font_unlock_face (PANGO_FC_FONT (pango_font));
}
#else
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;
coords = hb_font_get_var_coords_normalized (hb_font, &n_coords);
num_axes = hb_ot_var_get_axis_count (hb_face);
axes = g_new0 (hb_ot_var_axis_info_t, num_axes);
hb_ot_var_get_axis_infos (hb_face, 0, &num_axes, axes);
for (i = 0; i < num_axes; i ++)
{
float value;
if (coords && i < n_coords)
value = denorm_coord (&axes[i], coords[i]);
else
value = axes[i].default_value;
if (add_axis (fontchooser, hb_font_get_face (hb_font), &axes[i], value, i + 4))
has_axis = TRUE;
}
g_free (axes);
#endif
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)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
gint 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 (priv->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)
{
if (inconsistent)
gtk_widget_set_state_flags (GTK_WIDGET (button), GTK_STATE_FLAG_INCONSISTENT, FALSE);
else
gtk_widget_unset_state_flags (GTK_WIDGET (button), GTK_STATE_FLAG_INCONSISTENT);
// gtk_widget_set_opacity (gtk_widget_get_first_child (GTK_WIDGET (button)), inconsistent ? 0.0 : 1.0);
}
static void
feat_clicked (GtkWidget *feat,
gpointer data)
{
g_signal_handlers_block_by_func (feat, feat_clicked, NULL);
if (gtk_widget_get_state_flags (feat) & GTK_STATE_FLAG_INCONSISTENT)
{
set_inconsistent (GTK_CHECK_BUTTON (feat), FALSE);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (feat), TRUE);
}
g_signal_handlers_unblock_by_func (feat, feat_clicked, NULL);
}
static void
feat_pressed (GtkGesture *gesture,
int n_press,
double x,
double y,
GtkWidget *feat)
{
gboolean inconsistent;
inconsistent = (gtk_widget_get_state_flags (feat) & GTK_STATE_FLAG_INCONSISTENT) != 0;
set_inconsistent (GTK_CHECK_BUTTON (feat), !inconsistent);
}
static char *
find_affected_text (hb_tag_t feature_tag,
hb_font_t *hb_font,
hb_face_t *hb_face,
hb_tag_t script_tag,
hb_tag_t lang_tag,
int max_chars)
{
unsigned int script_index = 0;
unsigned int lang_index = 0;
unsigned int feature_index = 0;
GString *chars;
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;
gboolean destroy_font = FALSE;
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);
#ifdef FONT_FEATURES_USE_PANGOFT
if (hb_font == NULL)
{
/* only applicable if we are doing this via PangoFT2, where we need to create the hb_font_t */
hb_font = hb_font_create (hb_face);
hb_ft_font_set_funcs (hb_font);
destroy_font = TRUE;
}
#endif
gid = -1;
while (hb_set_next (glyphs_input, &gid)) {
hb_codepoint_t ch;
if (n_chars == max_chars)
{
g_string_append (chars, "…");
break;
}
for (ch = 0; ch < 0xffff; ch++) {
hb_codepoint_t glyph = 0;
hb_font_get_nominal_glyph (hb_font, ch, &glyph);
if (glyph == gid) {
g_string_append_unichar (chars, (gunichar)ch);
n_chars++;
break;
}
}
}
hb_set_destroy (glyphs_input);
if (destroy_font)
hb_font_destroy (hb_font);
}
}
return g_string_free (chars, FALSE);
}
static void
update_feature_example (FeatureItem *item,
hb_font_t *hb_font,
hb_face_t *hb_face,
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", 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, "nalt") == 0)
input = find_affected_text (item->tag, hb_font, hb_face, script_tag, lang_tag, 3);
else
input = find_affected_text (item->tag, hb_font, hb_face, 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
add_check_group (GtkFontChooserWidget *fontchooser,
const char *title,
const char **tags)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
GtkWidget *label;
GtkWidget *group;
PangoAttrList *attrs;
int i;
group = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_widget_show (group);
gtk_widget_set_halign (group, GTK_ALIGN_FILL);
label = gtk_label_new (title);
gtk_widget_show (label);
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_container_add (GTK_CONTAINER (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));
gtk_widget_show (feat);
set_inconsistent (GTK_CHECK_BUTTON (feat), TRUE);
g_signal_connect_swapped (feat, "notify::active", G_CALLBACK (update_font_features), fontchooser);
g_signal_connect_swapped (feat, "notify::inconsistent", G_CALLBACK (update_font_features), fontchooser);
g_signal_connect (feat, "clicked", G_CALLBACK (feat_clicked), NULL);
gesture = gtk_gesture_multi_press_new (feat);
g_object_set_data_full (G_OBJECT (feat), "press", gesture, g_object_unref);
gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (gesture), GDK_BUTTON_SECONDARY);
g_signal_connect (gesture, "pressed", G_CALLBACK (feat_pressed), feat);
example = gtk_label_new ("");
gtk_widget_show (example);
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_widget_show (box);
gtk_box_set_homogeneous (GTK_BOX (box), TRUE);
gtk_container_add (GTK_CONTAINER (box), feat);
gtk_container_add (GTK_CONTAINER (box), example);
gtk_container_add (GTK_CONTAINER (group), box);
item = g_new (FeatureItem, 1);
item->name = tags[i];
item->tag = tag;
item->top = box;
item->feat = feat;
item->example = example;
priv->feature_items = g_list_prepend (priv->feature_items, item);
}
gtk_container_add (GTK_CONTAINER (priv->feature_box), group);
}
static void
add_radio_group (GtkFontChooserWidget *fontchooser,
const char *title,
const char **tags)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
GtkWidget *label;
GtkWidget *group;
int i;
GtkWidget *group_button = NULL;
PangoAttrList *attrs;
group = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_widget_show (group);
gtk_widget_set_halign (group, GTK_ALIGN_FILL);
label = gtk_label_new (title);
gtk_widget_show (label);
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_container_add (GTK_CONTAINER (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_radio_button_new_with_label_from_widget (GTK_RADIO_BUTTON (group_button),
name ? name : _("Default"));
gtk_widget_show (feat);
if (group_button == NULL)
group_button = feat;
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_widget_show (example);
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_widget_show (box);
gtk_box_set_homogeneous (GTK_BOX (box), TRUE);
gtk_container_add (GTK_CONTAINER (box), feat);
gtk_container_add (GTK_CONTAINER (box), example);
gtk_container_add (GTK_CONTAINER (group), box);
item = g_new (FeatureItem, 1);
item->name = tags[i];
item->tag = tag;
item->top = box;
item->feat = feat;
item->example = example;
priv->feature_items = g_list_prepend (priv->feature_items, item);
}
gtk_container_add (GTK_CONTAINER (priv->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", 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)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
PangoFont *pango_font;
#ifdef FONT_FEATURES_USE_PANGOFT2
FT_Face ft_face;
#endif
hb_font_t *hb_font = NULL;
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;
gboolean cleanup_hb_face = FALSE;
for (l = priv->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 ((priv->level & GTK_FONT_CHOOSER_LEVEL_FEATURES) == 0)
return FALSE;
pango_font = pango_context_load_font (gtk_widget_get_pango_context (GTK_WIDGET (fontchooser)),
priv->font_desc);
#ifdef FONT_FEATURE_USE_PANGOFT2
if (PANGO_IS_FC_FONT (pango_font))
{
ft_face = pango_fc_font_lock_face (PANGO_FC_FONT (pango_font)),
hb_font = hb_ft_font_create (ft_face, NULL);
cleanup_hb_face = TRUE;
}
#else
hb_font = pango_font_get_hb_font (pango_font);
#endif
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 = priv->feature_items; l; l = l->next)
{
FeatureItem *item = l->data;
hb_font_t *hb_font2 = NULL;
if (item->tag != features[j])
continue;
has_feature = TRUE;
gtk_widget_show (item->top);
gtk_widget_show (gtk_widget_get_parent (item->top));
if (!cleanup_hb_face)
hb_font2 = hb_font;
update_feature_example (item, hb_font2, hb_face, script_tag, lang_tag, priv->font_desc);
if (GTK_IS_RADIO_BUTTON (item->feat))
{
GtkWidget *def = GTK_WIDGET (g_object_get_data (G_OBJECT (item->feat), "default"));
gtk_widget_show (gtk_widget_get_parent (def));
}
else if (GTK_IS_CHECK_BUTTON (item->feat))
{
set_inconsistent (GTK_CHECK_BUTTON (item->feat), TRUE);
}
}
}
if (cleanup_hb_face)
hb_face_destroy (hb_face);
}
#if FONT_FEATURE_USE_PANGOFT2
if (PANGO_IS_FC_FONT (pango_font))
pango_fc_font_unlock_face (PANGO_FC_FONT (pango_font));
#endif
g_object_unref (pango_font);
return has_feature;
}
static void
update_font_features (GtkFontChooserWidget *fontchooser)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
GString *s;
GList *l;
s = g_string_new ("");
for (l = priv->feature_items; l; l = l->next)
{
FeatureItem *item = l->data;
if (!gtk_widget_is_sensitive (item->feat))
continue;
if (GTK_IS_RADIO_BUTTON (item->feat))
{
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (item->feat)) &&
strcmp (item->name, "xxxx") != 0)
{
g_string_append_printf (s, "%s\"%s\" %d", s->len > 0 ? ", " : "", item->name, 1);
}
}
else if (GTK_IS_CHECK_BUTTON (item->feat))
{
if (gtk_widget_get_state_flags (item->feat) & GTK_STATE_FLAG_INCONSISTENT)
continue;
g_string_append_printf (s, "%s\"%s\" %d",
s->len > 0 ? ", " : "", item->name,
gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (item->feat)));
}
}
if (g_strcmp0 (priv->font_features, s->str) != 0)
{
g_free (priv->font_features);
priv->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);
}
#endif
static void
gtk_font_chooser_widget_merge_font_desc (GtkFontChooserWidget *fontchooser,
const PangoFontDescription *font_desc,
GtkTreeIter *iter)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
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, priv->font_desc))
return;
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))
{
gboolean has_tweak = FALSE;
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);
}
gtk_font_chooser_widget_update_marks (fontchooser);
#ifdef HAVE_FONT_FEATURES
if (gtk_font_chooser_widget_update_font_features (fontchooser))
has_tweak = TRUE;
if (gtk_font_chooser_widget_update_font_variations (fontchooser))
has_tweak = TRUE;
#endif
g_simple_action_set_enabled (G_SIMPLE_ACTION (priv->tweak_action), has_tweak);
}
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)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
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);
if (mask & (PANGO_FONT_MASK_FAMILY | PANGO_FONT_MASK_STYLE | PANGO_FONT_MASK_VARIANT |
PANGO_FONT_MASK_WEIGHT | PANGO_FONT_MASK_STRETCH))
{
GtkTreeIter iter;
if (gtk_font_chooser_widget_find_font (fontchooser, font_desc, &iter))
gtk_font_chooser_widget_merge_font_desc (fontchooser, font_desc, &iter);
else
gtk_font_chooser_widget_merge_font_desc (fontchooser, font_desc, NULL);
}
else
{
gtk_font_chooser_widget_merge_font_desc (fontchooser, font_desc, &priv->font_iter);
}
pango_font_description_free (font_desc);
}
static const gchar*
gtk_font_chooser_widget_get_preview_text (GtkFontChooserWidget *fontchooser)
{
return fontchooser->priv->preview_text;
}
static void
gtk_font_chooser_widget_set_preview_text (GtkFontChooserWidget *fontchooser,
const gchar *text)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
g_free (priv->preview_text);
priv->preview_text = g_strdup (text);
gtk_entry_set_text (GTK_ENTRY (priv->preview), text);
g_object_notify (G_OBJECT (fontchooser), "preview-text");
/* 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);
}
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_font_map (GtkFontChooser *chooser,
PangoFontMap *fontmap)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
if (g_set_object (&priv->font_map, fontmap))
{
PangoContext *context;
if (!fontmap)
fontmap = pango_cairo_font_map_get_default ();
context = gtk_widget_get_pango_context (priv->family_face_list);
pango_context_set_font_map (context, fontmap);
context = gtk_widget_get_pango_context (priv->preview);
pango_context_set_font_map (context, fontmap);
gtk_font_chooser_widget_load_fonts (fontchooser, TRUE);
}
}
static PangoFontMap *
gtk_font_chooser_widget_get_font_map (GtkFontChooser *chooser)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
return priv->font_map;
}
static void
gtk_font_chooser_widget_set_filter_func (GtkFontChooser *chooser,
GtkFontFilterFunc filter,
gpointer data,
GDestroyNotify destroy)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser);
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;
gtk_font_chooser_widget_refilter_font_list (fontchooser);
}
static void
gtk_font_chooser_widget_set_level (GtkFontChooserWidget *fontchooser,
GtkFontChooserLevel level)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
if (priv->level == level)
return;
priv->level = level;
if ((level & GTK_FONT_CHOOSER_LEVEL_SIZE) != 0)
{
gtk_widget_show (priv->size_slider);
gtk_widget_show (priv->size_spin);
gtk_widget_show (priv->size_label);
}
else
{
gtk_widget_hide (priv->size_slider);
gtk_widget_hide (priv->size_spin);
gtk_widget_hide (priv->size_label);
}
gtk_font_chooser_widget_load_fonts (fontchooser, TRUE);
g_object_notify (G_OBJECT (fontchooser), "level");
}
static GtkFontChooserLevel
gtk_font_chooser_widget_get_level (GtkFontChooserWidget *fontchooser)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
return priv->level;
}
static void
gtk_font_chooser_widget_set_language (GtkFontChooserWidget *fontchooser,
const char *language)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
PangoLanguage *lang;
lang = pango_language_from_string (language);
if (priv->language == lang)
return;
priv->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;
}
gboolean
gtk_font_chooser_widget_handle_event (GtkWidget *widget,
GdkEventKey *key_event)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (widget);
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
GdkEvent *event = (GdkEvent *)key_event;
return gtk_search_entry_handle_event (GTK_SEARCH_ENTRY (priv->search_entry), event);
}
GAction *
gtk_font_chooser_widget_get_tweak_action (GtkWidget *widget)
{
return GTK_FONT_CHOOSER_WIDGET (widget)->priv->tweak_action;
}
Reference in New Issue View Git Blame Copy Permalink