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gtk2/gtk/gtkfontchooserwidget.c
Carlos Garnacho 67239f112e fontchooser: Update to using GdkEvent API
2017-09-19 18:39:02 +02:00

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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 <atk/atk.h>
#include "gtkfontchooserwidget.h"
#include "gtkadjustment.h"
#include "gtkbuildable.h"
#include "gtkbox.h"
#include "gtkcellrenderertext.h"
#include "gtkcssnumbervalueprivate.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 "gtkstylecontextprivate.h"
#include "gtktextview.h"
#include "gtktreeselection.h"
#include "gtktreeview.h"
#include "gtkwidget.h"
#include "gtksettings.h"
#include "gtkdialog.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 *grid;
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;
gchar *preview_text;
gboolean show_preview_entry;
GtkWidget *size_spin;
GtkWidget *size_slider;
PangoFontMap *font_map;
PangoFontDescription *font_desc;
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;
};
/* 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 void gtk_font_chooser_widget_style_updated (GtkWidget *widget);
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 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 gtk_font_chooser_widget_iface_init (GtkFontChooserIface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkFontChooserWidget, gtk_font_chooser_widget, GTK_TYPE_WIDGET,
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 ())
GType gtk_delayed_font_description_get_type (void);
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;
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 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;
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_spin_button_set_text (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));
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);
}
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);
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));
GdkScrollDirection direction;
gdouble delta_x, delta_y;
if (!gdk_event_get_scroll_direction ((GdkEvent *) event, &direction))
return GDK_EVENT_PROPAGATE;
gdk_event_get_scroll_deltas ((GdkEvent *) event, &delta_x, &delta_y);
if (direction == GDK_SCROLL_UP || direction == GDK_SCROLL_RIGHT)
gtk_adjustment_set_value (adj,
gtk_adjustment_get_value (adj) +
gtk_adjustment_get_step_increment (adj));
else if (direction == GDK_SCROLL_DOWN || direction == GDK_SCROLL_LEFT)
gtk_adjustment_set_value (adj,
gtk_adjustment_get_value (adj) -
gtk_adjustment_get_step_increment (adj));
else if (direction == GDK_SCROLL_SMOOTH && delta_x != 0.0)
gtk_adjustment_set_value (adj,
gtk_adjustment_get_value (adj) +
gtk_adjustment_get_step_increment (adj) * delta_x);
else if (direction == GDK_SCROLL_SMOOTH && delta_y != 0.0)
gtk_adjustment_set_value (adj,
gtk_adjustment_get_value (adj) -
gtk_adjustment_get_step_increment (adj) * 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 */
pango_attr_list_insert (attrs, pango_attr_font_desc_new (priv->font_desc));
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_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (widget);
GtkFontChooserWidgetPrivate *priv = gtk_font_chooser_widget_get_instance_private (self);
gtk_widget_measure (priv->grid, orientation, for_size,
minimum, natural,
minimum_baseline, natural_baseline);
}
static void
gtk_font_chooser_widget_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (widget);
GtkFontChooserWidgetPrivate *priv = gtk_font_chooser_widget_get_instance_private (self);
gtk_widget_snapshot_child (widget, priv->grid, snapshot);
}
static void
gtk_font_chooser_widget_size_allocate (GtkWidget *widget,
const GtkAllocation *allocation,
int baseline,
GtkAllocation *out_clip)
{
GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (widget);
GtkFontChooserWidgetPrivate *priv = gtk_font_chooser_widget_get_instance_private (self);
GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->size_allocate (widget, allocation, -1, out_clip);
gtk_widget_size_allocate (priv->grid, allocation, -1, out_clip);
}
static void
gtk_font_chooser_widget_dispose (GObject *object)
{
GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (object);
GtkFontChooserWidgetPrivate *priv = gtk_font_chooser_widget_get_instance_private (self);
if (priv->grid)
{
gtk_widget_unparent (priv->grid);
priv->grid = NULL;
}
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);
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->style_updated = gtk_font_chooser_widget_style_updated;
widget_class->measure = gtk_font_chooser_widget_measure;
widget_class->size_allocate = gtk_font_chooser_widget_size_allocate;
widget_class->snapshot = gtk_font_chooser_widget_snapshot;
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;
_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, size_spin);
gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, size_slider);
gtk_widget_class_bind_template_child_private (widget_class, GtkFontChooserWidget, 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_set_css_name (widget_class, "fontchooser");
}
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_set_has_window (GTK_WIDGET (fontchooser), FALSE);
gtk_widget_init_template (GTK_WIDGET (fontchooser));
/* 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 ();
/* Set default preview text */
gtk_entry_set_text (GTK_ENTRY (priv->preview), priv->preview_text);
gtk_font_chooser_widget_update_preview_attributes (fontchooser);
/* 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);
/* Load data and set initial style-dependent parameters */
gtk_font_chooser_widget_load_fonts (fontchooser, TRUE);
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;
gchar *family_and_face;
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);
g_signal_handlers_block_by_func (priv->filter_model, row_deleted_cb, fontchooser);
gtk_list_store_clear (list_store);
g_signal_handlers_unblock_by_func (priv->filter_model, row_deleted_cb, fontchooser);
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;
PangoFontFace **faces;
int j, n_faces;
const gchar *fam_name = pango_font_family_get_name (families[i]);
pango_font_family_list_faces (families[i], &faces, &n_faces);
for (j = 0; j < n_faces; j++)
{
GtkDelayedFontDescription *desc;
const gchar *face_name;
face_name = pango_font_face_get_face_name (faces[j]);
family_and_face = 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, family_and_face,
-1);
g_free (family_and_face);
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);
/* We block row_deleted_cb when reloading, now manually switch to the
* "empty" pane if the filter model is empty.
*/
if (gtk_tree_model_iter_n_children (priv->filter_model, NULL) == 0)
gtk_stack_set_visible_child_name (GTK_STACK (priv->list_stack), "empty");
}
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;
GtkStyleContext *context;
double dpi, font_size;
context = gtk_widget_get_style_context (treeview);
dpi = _gtk_css_number_value_get (_gtk_style_context_peek_property (context,
GTK_CSS_PROPERTY_DPI),
100);
gtk_style_context_get (context,
"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,
gsize first_line_len)
{
PangoAttribute *attribute;
PangoAttrList *attrs;
attrs = pango_attr_list_new ();
attribute = pango_attr_weight_new (PANGO_WEIGHT_BOLD);
attribute->end_index = first_line_len;
pango_attr_list_insert (attrs, attribute);
attribute = pango_attr_scale_new (PANGO_SCALE_SMALL);
attribute->end_index = first_line_len;
pango_attr_list_insert (attrs, attribute);
if (font_desc)
{
attribute = pango_attr_font_desc_new (font_desc);
attribute->start_index = first_line_len;
pango_attr_list_insert (attrs, attribute);
}
attribute = pango_attr_fallback_new (FALSE);
attribute->start_index = first_line_len;
pango_attr_list_insert (attrs, attribute);
attribute = pango_attr_size_new_absolute (gtk_font_chooser_widget_get_preview_text_height (fontchooser));
attribute->start_index = first_line_len;
pango_attr_list_insert (attrs, attribute);
return attrs;
}
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, *text;
gsize first_line_len;
gtk_tree_model_get (tree_model, iter,
PREVIEW_TITLE_COLUMN, &preview_title,
FONT_DESC_COLUMN, &desc,
-1);
text = g_strconcat (preview_title, "\n", fontchooser->priv->preview_text, NULL);
first_line_len = strlen (preview_title) + 1;
attrs = gtk_font_chooser_widget_get_preview_attributes (fontchooser,
gtk_delayed_font_description_get (desc),
first_line_len);
g_object_set (cell,
"attributes", attrs,
"text", text,
NULL);
gtk_delayed_font_description_unref (desc);
pango_attr_list_unref (attrs);
g_free (text);
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,
1);
g_object_set (priv->family_face_cell,
"attributes", attrs,
"text", "x\nx",
NULL);
pango_attr_list_unref (attrs);
gtk_cell_renderer_get_preferred_size (priv->family_face_cell,
priv->family_face_list,
&size,
NULL);
gtk_cell_renderer_set_fixed_size (priv->family_face_cell, size.width, size.height);
}
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_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 void
gtk_font_chooser_widget_style_updated (GtkWidget *widget)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (widget);
GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->style_updated (widget);
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);
return pango_font_description_get_size (fontchooser->priv->font_desc);
}
static gchar *
gtk_font_chooser_widget_get_font (GtkFontChooserWidget *fontchooser)
{
return pango_font_description_to_string (fontchooser->priv->font_desc);
}
static PangoFontDescription *
gtk_font_chooser_widget_get_font_desc (GtkFontChooserWidget *fontchooser)
{
return fontchooser->priv->font_desc;
}
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_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);
}
}
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))
{
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);
}
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_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;
}
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