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gtk2/gtk/gtkfontchooserwidget.c
Benjamin Otte 1892c64acc fontchooser: Set a fixed size on the preview cell 
This way, all rows have the same height. It has 3 advantages:
1) No actual computation is necessary to compute the size of the cell.
   This speeds up the list tremendously (filling out the list goes from
   25s to 3s).
2) Buggy fonts don't mess up the list anymore with their weird sizes.
   Instead, they are clipped / empty space is added.
3) Buggy fonts look more buggy. So their use is hopefully discouraged.
2011-09-22 21:44:05 +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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <stdlib.h>
#include <glib/gprintf.h>
#include <string.h>
#include <atk/atk.h>
#include "gtkfontchooserwidget.h"
#include "gtkfontchooser.h"
#include "gtkfontchooserutils.h"
#include "gtkcellrenderertext.h"
#include "gtkentry.h"
#include "gtkframe.h"
#include "gtkbbox.h"
#include "gtkbox.h"
#include "gtklabel.h"
#include "gtkliststore.h"
#include "gtkstock.h"
#include "gtktextview.h"
#include "gtktreeselection.h"
#include "gtktreeview.h"
#include "gtkscrolledwindow.h"
#include "gtkintl.h"
#include "gtkaccessible.h"
#include "gtkbuildable.h"
#include "gtkprivate.h"
#include "gtkscale.h"
#include "gtkspinbutton.h"
#include "gtknotebook.h"
#include "gtkwidget.h"
#include "gtkgrid.h"
/**
* SECTION:gtkfontchooser
* @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().
*
* Since: 3.2
*/
struct _GtkFontChooserWidgetPrivate
{
GtkWidget *search_entry;
GtkWidget *family_face_list;
GtkCellRenderer *family_face_cell;
GtkWidget *list_scrolled_window;
GtkWidget *empty_list;
GtkWidget *list_notebook;
GtkTreeModel *model;
GtkTreeModel *filter_model;
GtkWidget *preview;
gchar *preview_text;
gboolean show_preview_entry;
GtkWidget *size_spin;
GtkWidget *size_slider;
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;
};
/* 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
#define NO_FONT_MATCHED_SEARCH N_("No fonts matched your search. You can revise your search and try again.")
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_bootstrap_fontlist (GtkFontChooserWidget *fontchooser);
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,
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_iface_init (GtkFontChooserIface *iface);
G_DEFINE_TYPE_WITH_CODE (GtkFontChooserWidget, gtk_font_chooser_widget, GTK_TYPE_BOX,
G_IMPLEMENT_INTERFACE (GTK_TYPE_FONT_CHOOSER,
gtk_font_chooser_widget_iface_init))
static void
gtk_font_chooser_widget_class_init (GtkFontChooserWidgetClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
widget_class->screen_changed = gtk_font_chooser_widget_screen_changed;
gobject_class->finalize = gtk_font_chooser_widget_finalize;
gobject_class->set_property = gtk_font_chooser_widget_set_property;
gobject_class->get_property = gtk_font_chooser_widget_get_property;
_gtk_font_chooser_install_properties (gobject_class);
g_type_class_add_private (klass, sizeof (GtkFontChooserWidgetPrivate));
}
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,
GParamSpec *pspec,
GtkFontChooserWidget *fc)
{
GtkFontChooserWidgetPrivate *priv = fc->priv;
const gchar *text;
text = gtk_entry_get_text (entry);
if (text == NULL || text[0] == '\0')
{
GIcon *icon;
icon = g_themed_icon_new_with_default_fallbacks ("edit-find-symbolic");
g_object_set (G_OBJECT (priv->search_entry),
"secondary-icon-gicon", icon,
"secondary-icon-activatable", FALSE,
"secondary-icon-sensitive", FALSE,
NULL);
g_object_unref (icon);
}
else
{
if (!gtk_entry_get_icon_activatable (GTK_ENTRY (priv->search_entry), GTK_ENTRY_ICON_SECONDARY))
{
GIcon *icon;
icon = g_themed_icon_new_with_default_fallbacks ("edit-clear-symbolic");
g_object_set (G_OBJECT (priv->search_entry),
"secondary-icon-gicon", icon,
"secondary-icon-activatable", TRUE,
"secondary-icon-sensitive", TRUE,
NULL);
g_object_unref (icon);
}
}
gtk_font_chooser_widget_refilter_font_list (fc);
}
static void
icon_press_cb (GtkEntry *entry,
GtkEntryIconPosition pos,
GdkEvent *event,
gpointer user_data)
{
gtk_entry_set_text (entry, "");
}
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 void
gtk_font_chooser_widget_update_marks (GtkFontChooserWidget *fontchooser)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
GtkAdjustment *adj;
const int *sizes;
gint *font_sizes;
gint i, n_sizes;
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));
/* ensure clamping doesn't callback into font resizing code */
g_signal_handlers_block_by_func (adj, size_change_cb, fontchooser);
gtk_adjustment_configure (adj,
gtk_adjustment_get_value (adj),
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 PangoFontDescription *
tree_model_get_font_description (GtkTreeModel *model,
GtkTreeIter *iter)
{
PangoFontDescription *desc;
PangoFontFace *face;
GtkTreeIter child_iter;
gtk_tree_model_get (model, iter,
FONT_DESC_COLUMN, &desc,
-1);
if (desc != NULL)
return desc;
gtk_tree_model_get (model, iter,
FACE_COLUMN, &face,
-1);
desc = pango_font_face_describe (face);
g_object_unref (face);
if (GTK_IS_TREE_MODEL_FILTER (model))
{
gtk_tree_model_filter_convert_iter_to_child_iter (GTK_TREE_MODEL_FILTER (model),
&child_iter,
iter);
iter = &child_iter;
model = gtk_tree_model_filter_get_model (GTK_TREE_MODEL_FILTER (model));
}
gtk_list_store_set (GTK_LIST_STORE (model), iter,
FONT_DESC_COLUMN, desc,
-1);
return desc;
}
static void
cursor_changed_cb (GtkTreeView *treeview,
gpointer user_data)
{
GtkFontChooserWidget *fontchooser = user_data;
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
PangoFontDescription *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);
desc = tree_model_get_font_description (priv->model, &iter);
gtk_font_chooser_widget_merge_font_desc (fontchooser, desc, &iter);
}
static gboolean
zoom_preview_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));
return TRUE;
}
static void
row_inserted_cb (GtkTreeModel *model,
GtkTreePath *path,
GtkTreeIter *iter,
gpointer user_data)
{
GtkFontChooserWidget *fontchooser = user_data;
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
gtk_notebook_set_current_page (GTK_NOTEBOOK (priv->list_notebook), 0);
}
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_notebook_set_current_page (GTK_NOTEBOOK (priv->list_notebook), 1);
}
static void
gtk_font_chooser_widget_init (GtkFontChooserWidget *fontchooser)
{
GIcon *icon;
GtkFontChooserWidgetPrivate *priv;
GtkWidget *scrolled_win;
GtkWidget *grid;
fontchooser->priv = G_TYPE_INSTANCE_GET_PRIVATE (fontchooser,
GTK_TYPE_FONT_CHOOSER_WIDGET,
GtkFontChooserWidgetPrivate);
priv = fontchooser->priv;
/* 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 ();
gtk_widget_push_composite_child ();
/* Creating fundamental widgets for the private struct */
priv->search_entry = gtk_entry_new ();
priv->family_face_list = gtk_tree_view_new ();
priv->preview = gtk_entry_new ();
priv->size_slider = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL,
0.0,
(gdouble)(G_MAXINT / PANGO_SCALE),
1.0);
priv->size_spin = gtk_spin_button_new_with_range (0.0, (gdouble)(G_MAXINT / PANGO_SCALE), 1.0);
/** Bootstrapping widget layout **/
gtk_box_set_spacing (GTK_BOX (fontchooser), 6);
/* Main font family/face view */
priv->list_scrolled_window = gtk_scrolled_window_new (NULL, NULL);
scrolled_win = priv->list_scrolled_window;
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_win),
GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolled_win),
GTK_SHADOW_ETCHED_IN);
gtk_widget_set_size_request (scrolled_win, 400, 300);
gtk_container_add (GTK_CONTAINER (scrolled_win), priv->family_face_list);
/* Text to display when list is empty */
priv->empty_list = gtk_label_new (_(NO_FONT_MATCHED_SEARCH));
gtk_widget_set_margin_top (priv->empty_list, 12);
gtk_widget_set_margin_left (priv->empty_list, 12);
gtk_widget_set_margin_right (priv->empty_list, 12);
gtk_widget_set_margin_bottom (priv->empty_list, 12);
gtk_widget_set_halign (priv->empty_list, GTK_ALIGN_CENTER);
gtk_widget_set_valign (priv->empty_list, GTK_ALIGN_START);
priv->list_notebook = gtk_notebook_new ();
gtk_notebook_set_show_tabs (GTK_NOTEBOOK (priv->list_notebook), FALSE);
gtk_notebook_append_page (GTK_NOTEBOOK (priv->list_notebook), scrolled_win, NULL);
gtk_notebook_append_page (GTK_NOTEBOOK (priv->list_notebook), priv->empty_list, NULL);
/* Basic layout */
grid = gtk_grid_new ();
gtk_grid_set_column_spacing (GTK_GRID (grid), 6);
gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
gtk_grid_attach (GTK_GRID (grid), priv->search_entry, 0, 0, 2, 1);
gtk_grid_attach (GTK_GRID (grid), priv->list_notebook, 0, 1, 2, 1);
gtk_grid_attach (GTK_GRID (grid), priv->preview, 0, 2, 2, 1);
gtk_grid_attach (GTK_GRID (grid), priv->size_slider, 0, 3, 1, 1);
gtk_grid_attach (GTK_GRID (grid), priv->size_spin, 1, 3, 1, 1);
gtk_widget_set_hexpand (GTK_WIDGET (scrolled_win), TRUE);
gtk_widget_set_vexpand (GTK_WIDGET (scrolled_win), TRUE);
gtk_widget_set_hexpand (GTK_WIDGET (priv->search_entry), TRUE);
gtk_widget_set_hexpand (GTK_WIDGET (priv->size_slider), TRUE);
gtk_widget_set_hexpand (GTK_WIDGET (priv->size_spin), FALSE);
gtk_box_pack_start (GTK_BOX (fontchooser), grid, TRUE, TRUE, 0);
gtk_widget_show_all (GTK_WIDGET (fontchooser));
gtk_widget_hide (GTK_WIDGET (fontchooser));
/* Treeview column and model bootstrapping */
gtk_font_chooser_widget_bootstrap_fontlist (fontchooser);
/* Set default preview text */
gtk_entry_set_text (GTK_ENTRY (priv->preview),
pango_language_get_sample_string (NULL));
/* Set search icon and place holder text */
icon = g_themed_icon_new_with_default_fallbacks ("edit-find-symbolic");
g_object_set (G_OBJECT (priv->search_entry),
"secondary-icon-gicon", icon,
"secondary-icon-activatable", FALSE,
"secondary-icon-sensitive", FALSE,
NULL);
g_object_unref (icon);
gtk_entry_set_placeholder_text (GTK_ENTRY (priv->search_entry), _("Search font name"));
/** Callback connections **/
g_signal_connect (priv->search_entry, "notify::text",
G_CALLBACK (text_changed_cb), fontchooser);
g_signal_connect (priv->search_entry,
"icon-press", G_CALLBACK (icon_press_cb), NULL);
g_signal_connect (gtk_range_get_adjustment (GTK_RANGE (priv->size_slider)),
"value-changed", G_CALLBACK (size_change_cb), fontchooser);
g_signal_connect (gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (priv->size_spin)),
"value-changed", G_CALLBACK (size_change_cb), fontchooser);
g_signal_connect (priv->family_face_list, "cursor-changed",
G_CALLBACK (cursor_changed_cb), fontchooser);
g_signal_connect (priv->family_face_list, "row-activated",
G_CALLBACK (row_activated_cb), fontchooser);
/* Zoom on preview scroll */
g_signal_connect (priv->preview, "scroll-event",
G_CALLBACK (zoom_preview_cb), fontchooser);
g_signal_connect (priv->size_slider, "scroll-event",
G_CALLBACK (zoom_preview_cb), fontchooser);
/* Font list empty hides the scrolledwindow */
g_signal_connect (G_OBJECT (priv->filter_model), "row-deleted",
G_CALLBACK (row_deleted_cb), fontchooser);
g_signal_connect (G_OBJECT (priv->filter_model), "row-inserted",
G_CALLBACK (row_inserted_cb), fontchooser);
/* Set default focus */
gtk_widget_pop_composite_child ();
gtk_font_chooser_widget_take_font_desc (fontchooser, NULL);
}
/**
* gtk_font_chooser_widget_new:
*
* Creates a new #GtkFontChooserWidget.
*
* Return value: a new #GtkFontChooserWidget
*
* Since: 3.2
*/
GtkWidget *
gtk_font_chooser_widget_new (void)
{
return g_object_new (GTK_TYPE_FONT_CHOOSER_WIDGET, NULL);
}
static int
cmp_families (const void *a,
const void *b)
{
const char *a_name = pango_font_family_get_name (*(PangoFontFamily **)a);
const char *b_name = pango_font_family_get_name (*(PangoFontFamily **)b);
return g_utf8_collate (a_name, b_name);
}
static void
gtk_font_chooser_widget_load_fonts (GtkFontChooserWidget *fontchooser)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
GtkListStore *list_store;
gint n_families, i;
PangoFontFamily **families;
gchar *family_and_face;
list_store = GTK_LIST_STORE (priv->model);
pango_context_list_families (gtk_widget_get_pango_context (GTK_WIDGET (fontchooser)),
&families,
&n_families);
qsort (families, n_families, sizeof (PangoFontFamily *), cmp_families);
gtk_list_store_clear (list_store);
/* Iterate over families and faces */
for (i = 0; i < n_families; i++)
{
GtkTreeIter iter;
PangoFontFace **faces;
int j, n_faces;
const gchar *fam_name = pango_font_family_get_name (families[i]);
pango_font_family_list_faces (families[i], &faces, &n_faces);
for (j = 0; j < n_faces; j++)
{
const gchar *face_name;
face_name = pango_font_face_get_face_name (faces[j]);
family_and_face = g_strconcat (fam_name, " ", face_name, NULL);
gtk_list_store_insert_with_values (list_store, &iter, -1,
FAMILY_COLUMN, families[i],
FACE_COLUMN, faces[j],
PREVIEW_TITLE_COLUMN, family_and_face,
-1);
g_free (family_and_face);
}
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 / 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_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;
PangoFontDescription *font_desc;
PangoAttrList *attrs;
char *to_string, *text;
gsize first_line_len;
font_desc = tree_model_get_font_description (tree_model, iter);
to_string = pango_font_description_to_string (font_desc);
text = g_strconcat (to_string, "\n", fontchooser->priv->preview_text, NULL);
first_line_len = strlen (to_string) + 1;
attrs = gtk_font_chooser_widget_get_preview_attributes (fontchooser,
font_desc,
first_line_len);
g_object_set (cell,
"attributes", attrs,
"text", text,
NULL);
pango_font_description_free (font_desc);
pango_attr_list_unref (attrs);
g_free (to_string);
g_free (text);
}
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_bootstrap_fontlist (GtkFontChooserWidget *fontchooser)
{
GtkFontChooserWidgetPrivate *priv = fontchooser->priv;
GtkTreeView *treeview = GTK_TREE_VIEW (priv->family_face_list);
GtkTreeViewColumn *col;
g_signal_connect_data (priv->family_face_list,
"style-updated",
G_CALLBACK (gtk_font_chooser_widget_set_cell_size),
fontchooser,
NULL,
G_CONNECT_AFTER | G_CONNECT_SWAPPED);
priv->model = GTK_TREE_MODEL (gtk_list_store_new (4,
PANGO_TYPE_FONT_FAMILY,
PANGO_TYPE_FONT_FACE,
PANGO_TYPE_FONT_DESCRIPTION,
G_TYPE_STRING));
priv->filter_model = gtk_tree_model_filter_new (priv->model, NULL);
g_object_unref (priv->model);
gtk_tree_model_filter_set_visible_func (GTK_TREE_MODEL_FILTER (priv->filter_model),
visible_func, (gpointer)priv, NULL);
gtk_tree_view_set_model (treeview, priv->filter_model);
g_object_unref (priv->filter_model);
gtk_tree_view_set_rules_hint (treeview, TRUE);
gtk_tree_view_set_headers_visible (treeview, FALSE);
priv->family_face_cell = gtk_cell_renderer_text_new ();
g_object_set (priv->family_face_cell, "ellipsize", PANGO_ELLIPSIZE_END, NULL);
col = gtk_tree_view_column_new ();
gtk_tree_view_column_set_title (col, _("Font Family"));
gtk_tree_view_column_pack_start (col, priv->family_face_cell, TRUE);
gtk_tree_view_column_set_cell_data_func (col,
priv->family_face_cell,
gtk_font_chooser_widget_cell_data_func,
fontchooser,
NULL);
gtk_tree_view_append_column (treeview, col);
gtk_font_chooser_widget_load_fonts (fontchooser);
gtk_font_chooser_widget_set_cell_size (fontchooser);
}
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_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;
PangoFontDescription *desc;
PangoFontFamily *family;
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))
{
gtk_tree_model_get (priv->model, iter,
FAMILY_COLUMN, &family,
-1);
if (!my_pango_font_family_equal (pango_font_description_get_family (font_desc),
pango_font_family_get_name (family)))
continue;
desc = tree_model_get_font_description (priv->model, iter);
pango_font_description_merge_static (desc, font_desc, FALSE);
if (pango_font_description_equal (desc, font_desc))
break;
pango_font_description_free (desc);
}
return valid;
}
static void
gtk_font_chooser_widget_screen_changed (GtkWidget *widget,
GdkScreen *previous_screen)
{
GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (widget);
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 == NULL)
previous_screen = gdk_screen_get_default ();
if (previous_screen == gtk_widget_get_screen (widget))
return;
gtk_font_chooser_widget_load_fonts (fontchooser);
}
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))
{
gtk_tree_selection_select_iter (selection, &filter_iter);
}
else
{
gtk_tree_selection_unselect_all (selection);
}
}
static void
gtk_font_chooser_widget_merge_font_desc (GtkFontChooserWidget *fontchooser,
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))
{
pango_font_description_free (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_widget_override_font (priv->preview, priv->font_desc);
pango_font_description_free (font_desc); /* adopted */
g_object_notify (G_OBJECT (fontchooser), "font");
g_object_notify (G_OBJECT (fontchooser), "font-desc");
}
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);
}
}
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_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;
}
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