[gnome-font-viewer] Show OpenType layout features
- From: Matthias Clasen <matthiasc src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gnome-font-viewer] Show OpenType layout features
- Date: Tue, 19 Sep 2017 03:29:07 +0000 (UTC)
commit 5eabb1f7a7e4f673ffe952d2b525495cf40d7581
Author: Matthias Clasen <mclasen redhat com>
Date: Sat Sep 16 09:37:53 2017 -0400
Show OpenType layout features
Making such font features visible is the first step towards
getting them to be exposed and used in appliations, where
appropriate.
https://bugzilla.gnome.org/show_bug.cgi?id=787759
font-view.c | 1165 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
src/font-view.c | 130 ++++++
2 files changed, 1295 insertions(+), 0 deletions(-)
---
diff --git a/font-view.c b/font-view.c
new file mode 100644
index 0000000..18f4e67
--- /dev/null
+++ b/font-view.c
@@ -0,0 +1,1165 @@
+/* -*- mode: C; c-basic-offset: 4 -*- */
+
+/*
+ * font-view: a font viewer for GNOME
+ *
+ * Copyright (C) 2002-2003 James Henstridge <james daa com au>
+ * Copyright (C) 2010 Cosimo Cecchi <cosimoc gnome org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <config.h>
+
+#include <ft2build.h>
+#include FT_FREETYPE_H
+#include FT_TYPE1_TABLES_H
+#include FT_SFNT_NAMES_H
+#include FT_TRUETYPE_IDS_H
+#include FT_MULTIPLE_MASTERS_H
+#include <cairo/cairo-ft.h>
+#include <fontconfig/fontconfig.h>
+#include <gio/gio.h>
+#include <gtk/gtk.h>
+#include <glib/gi18n.h>
+#include <hb.h>
+#include <hb-ot.h>
+#include <hb-ft.h>
+
+#include "font-model.h"
+#include "sushi-font-widget.h"
+
+#define FONT_VIEW_TYPE_APPLICATION font_view_application_get_type()
+#define FONT_VIEW_APPLICATION(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST ((obj), FONT_VIEW_TYPE_APPLICATION, FontViewApplication))
+
+typedef struct {
+ GtkApplication parent;
+
+ GtkWidget *main_window;
+ GtkWidget *main_grid;
+ GtkWidget *header;
+ GtkWidget *title_label;
+ GtkWidget *side_grid;
+ GtkWidget *font_widget;
+ GtkWidget *info_button;
+ GtkWidget *install_button;
+ GtkWidget *back_button;
+ GtkWidget *stack;
+ GtkWidget *swin_view;
+ GtkWidget *swin_preview;
+ GtkWidget *icon_view;
+
+ GtkTreeModel *model;
+
+ GFile *font_file;
+} FontViewApplication;
+
+typedef struct {
+ GtkApplicationClass parent_class;
+} FontViewApplicationClass;
+
+static gboolean
+_print_version_and_exit (const gchar *option_name,
+ const gchar *value,
+ gpointer data,
+ GError **error)
+{
+ g_print("%s %s\n", _("GNOME Fonts"), VERSION);
+ exit (EXIT_SUCCESS);
+ return TRUE;
+}
+
+static const GOptionEntry goption_options[] =
+{
+ { "version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
+ _print_version_and_exit, N_("Show the application's version"), NULL},
+ { NULL }
+};
+
+G_DEFINE_TYPE (FontViewApplication, font_view_application, GTK_TYPE_APPLICATION);
+
+static void font_view_application_do_overview (FontViewApplication *self);
+static void ensure_window (FontViewApplication *self);
+
+#define VIEW_ITEM_WIDTH 140
+#define VIEW_ITEM_WRAP_WIDTH 128
+#define VIEW_COLUMN_SPACING 36
+#define VIEW_MARGIN 16
+
+#define WHITESPACE_CHARS "\f \t"
+
+static void
+strip_whitespace (gchar **original)
+{
+ GString *reassembled;
+ gchar **split;
+ const gchar *str;
+ gint idx, n_stripped;
+ size_t len;
+
+ split = g_strsplit (*original, "\n", -1);
+ reassembled = g_string_new (NULL);
+ n_stripped = 0;
+
+ for (idx = 0; split[idx] != NULL; idx++) {
+ str = split[idx];
+
+ len = strspn (str, WHITESPACE_CHARS);
+ if (len)
+ str += len;
+
+ if (strlen (str) == 0 &&
+ ((split[idx + 1] == NULL) || strlen (split[idx + 1]) == 0))
+ continue;
+
+ if (n_stripped++ > 0)
+ g_string_append (reassembled, "\n");
+ g_string_append (reassembled, str);
+ }
+
+ g_strfreev (split);
+ g_free (*original);
+
+ *original = g_string_free (reassembled, FALSE);
+}
+
+#define MATCH_VERSION_STR "Version"
+
+static void
+strip_version (gchar **original)
+{
+ gchar *ptr, *stripped;
+
+ ptr = g_strstr_len (*original, -1, MATCH_VERSION_STR);
+ if (!ptr)
+ return;
+
+ ptr += strlen (MATCH_VERSION_STR);
+ stripped = g_strdup (ptr);
+
+ strip_whitespace (&stripped);
+
+ g_free (*original);
+ *original = stripped;
+}
+
+static void
+add_row (GtkWidget *grid,
+ const gchar *name,
+ const gchar *value,
+ gboolean multiline)
+{
+ GtkWidget *name_w, *label;
+
+ name_w = gtk_label_new (name);
+ gtk_style_context_add_class (gtk_widget_get_style_context (name_w), "dim-label");
+ gtk_widget_set_halign (name_w, GTK_ALIGN_END);
+ gtk_widget_set_valign (name_w, GTK_ALIGN_START);
+
+ gtk_container_add (GTK_CONTAINER (grid), name_w);
+
+ label = gtk_label_new (value);
+ gtk_widget_set_halign (label, GTK_ALIGN_START);
+ gtk_widget_set_valign (label, GTK_ALIGN_START);
+ gtk_label_set_selectable (GTK_LABEL(label), TRUE);
+
+ gtk_label_set_line_wrap (GTK_LABEL (label), TRUE);
+ gtk_label_set_xalign (GTK_LABEL (label), 0.0);
+
+ if (multiline && g_utf8_strlen (value, -1) > 64) {
+ gtk_label_set_width_chars (GTK_LABEL (label), 64);
+ gtk_label_set_ellipsize (GTK_LABEL (label), PANGO_ELLIPSIZE_END);
+ }
+ gtk_label_set_max_width_chars (GTK_LABEL (label), 64);
+
+ gtk_grid_attach_next_to (GTK_GRID (grid), label,
+ name_w, GTK_POS_RIGHT,
+ 1, 1);
+}
+
+#define FixedToFloat(f) (((float)(f))/65536.0)
+
+static char *
+describe_axis (FT_Var_Axis *ax)
+{
+ return g_strdup_printf (_("%s [%g, %g], default %g"), ax->name,
+ FixedToFloat(ax->minimum),
+ FixedToFloat(ax->maximum),
+ FixedToFloat(ax->def));
+}
+
+static char *
+get_sfnt_name (FT_Face face, guint id)
+{
+ guint count, i;
+
+ count = FT_Get_Sfnt_Name_Count (face);
+ for (i = 0; i < count; i++) {
+ FT_SfntName sname;
+
+ if (FT_Get_Sfnt_Name (face, i, &sname) != 0)
+ continue;
+
+ if (sname.name_id != id)
+ continue;
+
+ /* only handle the unicode names for US langid */
+ if (!(sname.platform_id == TT_PLATFORM_MICROSOFT &&
+ sname.encoding_id == TT_MS_ID_UNICODE_CS &&
+ sname.language_id == TT_MS_LANGID_ENGLISH_UNITED_STATES))
+ continue;
+
+ return g_convert ((gchar *)sname.string, sname.string_len,
+ "UTF-8", "UTF-16BE", NULL, NULL, NULL);
+ }
+ return NULL;
+}
+
+static gboolean
+is_valid_subfamily_id (guint id)
+{
+ return id == 2 || id == 17 || (255 < id && id < 32768);
+}
+
+static void
+describe_instance (FT_Face face, FT_Var_Named_Style *ns, int pos, GString *s)
+{
+ if (is_valid_subfamily_id (ns->strid)) {
+ char *str = get_sfnt_name (face, ns->strid);
+ if (str) {
+ if (s->len > 0)
+ g_string_append (s, ", ");
+ g_string_append (s, str);
+ g_free (str);
+ return;
+ }
+ }
+
+ if (s->len > 0)
+ g_string_append (s, ", ");
+ g_string_append_printf (s, _("Instance %d"), pos);
+}
+
+static struct {
+ const char *tag;
+ const char *name;
+} features[] = {
+ { "kern", N_("Kerning") },
+ { "liga", N_("Common Ligatures") },
+ { "dlig", N_("Discretionary Ligatures") },
+ { "hlig", N_("Historical Ligatures") },
+ { "clig", N_("Contextual Ligatures") },
+ { "smcp", N_("Small Caps") },
+ { "c2sc", N_("Small Caps from Caps") },
+ { "pcap", N_("Petite Caps") },
+ { "c2pc", N_("Caps to Petite Caps") },
+ { "unic", N_("Unicase") },
+ { "cpsp", N_("Capital Spacing") },
+ { "case", N_("Case-sensitive Forms") },
+ { "lnum", N_("Lining Numbers") },
+ { "onum", N_("Old-Style Numbers") },
+ { "pnum", N_("Proportional Numbers") },
+ { "tnum", N_("Tabular Numbers") },
+ { "frac", N_("Normal Fractions") },
+ { "afrc", N_("Alternate Fractions") },
+ { "zero", N_("Slashed Zero") },
+ { "nalt", N_("Alternative Annotations") },
+ { "sinf", N_("Scientific Inferiors") },
+ { "swsh", N_("Swash Glyphs") },
+ { "cswh", N_("Contextual Swash") },
+ { "locl", N_("Localized Forms") },
+ { "calt", N_("Contextual Alternatives") },
+ { "hist", N_("Historical Alternatives") },
+ { "salt", N_("Stylistic Alternatives") },
+ { "titl", N_("Titling Alternatives") },
+ { "rand", N_("Randomize") },
+ { "subs", N_("Subscript") },
+ { "sups", N_("Superscript") },
+ { "init", N_("Initial Forms") },
+ { "medi", N_("Medial Forms") },
+ { "fina", N_("Final Forms") },
+ { "isol", N_("Isolated Forms") },
+ { "ss01", N_("Stylistic Set 1") },
+ { "ss02", N_("Stylistic Set 2") },
+ { "ss03", N_("Stylistic Set 3") },
+ { "ss04", N_("Stylistic Set 4") },
+ { "ss05", N_("Stylistic Set 5") },
+};
+
+static char *
+get_features (FT_Face face)
+{
+ hb_font_t *hb_font;
+ int i, j;
+ GString *s;
+
+ s = g_string_new ("");
+
+ hb_font = hb_ft_font_create (face, NULL);
+ if (hb_font) {
+ hb_tag_t tables[2] = { HB_OT_TAG_GSUB, HB_OT_TAG_GPOS };
+ hb_face_t *hb_face;
+
+ hb_face = hb_font_get_face (hb_font);
+
+ for (i = 0; i < 2; i++) {
+ hb_tag_t features[80];
+ unsigned int count = G_N_ELEMENTS (features);
+ unsigned int script_index = 0;
+ unsigned int lang_index = 0;
+
+ hb_ot_layout_language_get_feature_tags (hb_face,
+ tables[i],
+ script_index,
+ lang_index,
+ 0,
+ &count,
+ features);
+ for (j = 0; j < count; j++) {
+ char buf[5];
+ hb_tag_to_string (features[j], buf); buf[4] = '\0';
+ if (s->len > 0)
+ g_string_append (s, ", ");
+ g_string_append (s, buf);
+ }
+ }
+ }
+
+ if (s->len > 0)
+ return g_string_free (s, FALSE);
+
+ g_string_free (s, TRUE);
+
+ return NULL;
+}
+
+static void
+populate_grid (FontViewApplication *self,
+ GtkWidget *grid,
+ FT_Face face)
+{
+ gchar *s;
+ GFileInfo *info;
+ PS_FontInfoRec ps_info;
+ FT_MM_Var *ft_mm_var;
+
+ add_row (grid, _("Name"), face->family_name, FALSE);
+
+ if (face->style_name)
+ add_row (grid, _("Style"), face->style_name, FALSE);
+
+ info = g_file_query_info (self->font_file,
+ G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE ","
+ G_FILE_ATTRIBUTE_STANDARD_SIZE,
+ G_FILE_QUERY_INFO_NONE,
+ NULL, NULL);
+
+ if (info != NULL) {
+ s = g_content_type_get_description (g_file_info_get_content_type (info));
+ add_row (grid, _("Type"), s, FALSE);
+ g_free (s);
+
+ g_object_unref (info);
+ }
+
+ if (FT_IS_SFNT (face)) {
+ gint i, len;
+ gchar *version = NULL, *copyright = NULL, *description = NULL;
+ gchar *designer = NULL, *manufacturer = NULL, *license = NULL;
+
+ len = FT_Get_Sfnt_Name_Count (face);
+ for (i = 0; i < len; i++) {
+ FT_SfntName sname;
+
+ if (FT_Get_Sfnt_Name (face, i, &sname) != 0)
+ continue;
+
+ /* only handle the unicode names for US langid */
+ if (!(sname.platform_id == TT_PLATFORM_MICROSOFT &&
+ sname.encoding_id == TT_MS_ID_UNICODE_CS &&
+ sname.language_id == TT_MS_LANGID_ENGLISH_UNITED_STATES))
+ continue;
+
+ switch (sname.name_id) {
+ case TT_NAME_ID_COPYRIGHT:
+ g_free (copyright);
+ copyright = g_convert ((gchar *)sname.string, sname.string_len,
+ "UTF-8", "UTF-16BE", NULL, NULL, NULL);
+ break;
+ case TT_NAME_ID_VERSION_STRING:
+ g_free (version);
+ version = g_convert ((gchar *)sname.string, sname.string_len,
+ "UTF-8", "UTF-16BE", NULL, NULL, NULL);
+ break;
+ case TT_NAME_ID_DESCRIPTION:
+ g_free (description);
+ description = g_convert ((gchar *)sname.string, sname.string_len,
+ "UTF-8", "UTF-16BE", NULL, NULL, NULL);
+ break;
+ case TT_NAME_ID_MANUFACTURER:
+ g_free (manufacturer);
+ manufacturer = g_convert ((gchar *)sname.string, sname.string_len,
+ "UTF-8", "UTF-16BE", NULL, NULL, NULL);
+ break;
+ case TT_NAME_ID_DESIGNER:
+ g_free (designer);
+ designer = g_convert ((gchar *)sname.string, sname.string_len,
+ "UTF-8", "UTF-16BE", NULL, NULL, NULL);
+ break;
+ case TT_NAME_ID_LICENSE:
+ g_free (license);
+ license = g_convert ((gchar *)sname.string, sname.string_len,
+ "UTF-8", "UTF-16BE", NULL, NULL, NULL);
+ break;
+ default:
+ break;
+ }
+ }
+ if (version) {
+ strip_version (&version);
+ add_row (grid, _("Version"), version, FALSE);
+ g_free (version);
+ }
+ if (copyright) {
+ strip_whitespace (©right);
+ add_row (grid, _("Copyright"), copyright, TRUE);
+ g_free (copyright);
+ }
+ if (description) {
+ strip_whitespace (&description);
+ add_row (grid, _("Description"), description, TRUE);
+ g_free (description);
+ }
+ if (manufacturer) {
+ strip_whitespace (&manufacturer);
+ add_row (grid, _("Manufacturer"), manufacturer, TRUE);
+ g_free (manufacturer);
+ }
+ if (designer) {
+ strip_whitespace (&designer);
+ add_row (grid, _("Designer"), designer, TRUE);
+ g_free (designer);
+ }
+ if (license) {
+ strip_whitespace (&license);
+ add_row (grid, _("License"), license, TRUE);
+ g_free (license);
+ }
+ } else if (FT_Get_PS_Font_Info (face, &ps_info) == 0) {
+ gchar *compressed;
+
+ if (ps_info.version && g_utf8_validate (ps_info.version, -1, NULL)) {
+ compressed = g_strcompress (ps_info.version);
+ strip_version (&compressed);
+ add_row (grid, _("Version"), compressed, FALSE);
+ g_free (compressed);
+ }
+ if (ps_info.notice && g_utf8_validate (ps_info.notice, -1, NULL)) {
+ compressed = g_strcompress (ps_info.notice);
+ strip_whitespace (&compressed);
+ add_row (grid, _("Copyright"), compressed, TRUE);
+ g_free (compressed);
+ }
+ }
+ {
+ char *s = g_strdup_printf ("%ld", face->num_glyphs);
+ add_row (grid, _("Glyph count"), s, FALSE);
+ g_free (s);
+ }
+ add_row (grid, _("Color glyphs"), FT_HAS_COLOR (face) ? _("yes") : _("no"), FALSE);
+
+ {
+ char *features = get_features (face);
+ if (features)
+ add_row (grid, _("Features"), features, TRUE);
+ g_free (features);
+ }
+
+ if (FT_Get_MM_Var (face, &ft_mm_var) == 0) {
+ int i;
+ for (i = 0; i < ft_mm_var->num_axis; i++) {
+ char *s = describe_axis (&ft_mm_var->axis[i]);
+ add_row (grid, i == 0 ? _("Axes") : "", s, FALSE);
+ g_free (s);
+ }
+ {
+ GString *s = g_string_new ("");
+ for (i = 0; i < ft_mm_var->num_namedstyles; i++) {
+ describe_instance (face, &ft_mm_var->namedstyle[i], i, s);
+ }
+ add_row (grid, _("Instances"), s->str, TRUE);
+ g_string_free (s, TRUE);
+ }
+ }
+}
+
+static void
+install_button_refresh_appearance (FontViewApplication *self,
+ GError *error)
+{
+ FT_Face face;
+ GtkStyleContext *context;
+
+ context = gtk_widget_get_style_context (self->install_button);
+
+ if (error != NULL) {
+ gtk_button_set_label (GTK_BUTTON (self->install_button), _("Install Failed"));
+ gtk_widget_set_sensitive (self->install_button, FALSE);
+ gtk_style_context_remove_class (context, "suggested-action");
+ } else {
+ face = sushi_font_widget_get_ft_face (SUSHI_FONT_WIDGET (self->font_widget));
+
+ if (font_view_model_get_iter_for_face (FONT_VIEW_MODEL (self->model), face, NULL)) {
+ gtk_button_set_label (GTK_BUTTON (self->install_button), _("Installed"));
+ gtk_widget_set_sensitive (self->install_button, FALSE);
+ gtk_style_context_remove_class (context, "suggested-action");
+ } else {
+ gtk_button_set_label (GTK_BUTTON (self->install_button), _("Install"));
+ gtk_widget_set_sensitive (self->install_button, TRUE);
+ gtk_style_context_add_class (context, "suggested-action");
+ }
+ }
+}
+
+static void
+font_install_finished_cb (GObject *source_object,
+ GAsyncResult *res,
+ gpointer user_data)
+{
+ FontViewApplication *self = user_data;
+ GError *err = NULL;
+
+ g_file_copy_finish (G_FILE (source_object), res, &err);
+
+ if (err != NULL) {
+ install_button_refresh_appearance (self, err);
+
+ g_debug ("Install failed: %s", err->message);
+ g_error_free (err);
+ }
+}
+
+static void
+font_model_config_changed_cb (FontViewModel *model,
+ gpointer user_data)
+{
+ FontViewApplication *self = user_data;
+
+ if (self->font_file != NULL)
+ install_button_refresh_appearance (self, NULL);
+}
+
+static void
+install_button_clicked_cb (GtkButton *button,
+ gpointer user_data)
+{
+ FontViewApplication *self = user_data;
+ gchar *dest_filename;
+ GError *err = NULL;
+ FcConfig *config;
+ FcStrList *str_list;
+ FcChar8 *path;
+ GFile *xdg_prefix, *home_prefix, *file;
+ GFile *xdg_location = NULL, *home_location = NULL;
+ GFile *dest_location = NULL, *dest_file;
+
+ config = FcConfigGetCurrent ();
+ str_list = FcConfigGetFontDirs (config);
+
+ home_prefix = g_file_new_for_path (g_get_home_dir ());
+ xdg_prefix = g_file_new_for_path (g_get_user_data_dir ());
+
+ /* pick the XDG location, if any, or fallback to the first location
+ * under the home directory.
+ */
+ while ((path = FcStrListNext (str_list)) != NULL) {
+ file = g_file_new_for_path ((const gchar *) path);
+
+ if (g_file_has_prefix (file, xdg_prefix)) {
+ xdg_location = file;
+ break;
+ }
+
+ if ((home_location == NULL) &&
+ g_file_has_prefix (file, home_prefix)) {
+ home_location = file;
+ break;
+ }
+
+ g_object_unref (file);
+ }
+
+ FcStrListDone (str_list);
+ g_object_unref (home_prefix);
+ g_object_unref (xdg_prefix);
+
+ if (xdg_location != NULL)
+ dest_location = g_object_ref (xdg_location);
+ else if (home_location != NULL)
+ dest_location = g_object_ref (home_location);
+
+ g_clear_object (&home_location);
+ g_clear_object (&xdg_location);
+
+ if (dest_location == NULL) {
+ g_warning ("Install failed: can't find any configured user font directory.");
+ return;
+ }
+
+ if (!g_file_query_exists (dest_location, NULL)) {
+ g_file_make_directory_with_parents (dest_location, NULL, &err);
+ if (err) {
+ /* TODO: show error dialog */
+ g_warning ("Could not create fonts directory: %s", err->message);
+ g_error_free (err);
+ g_object_unref (dest_location);
+ return;
+ }
+ }
+
+ /* create destination filename */
+ dest_filename = g_file_get_basename (self->font_file);
+ dest_file = g_file_get_child (dest_location, dest_filename);
+ g_free (dest_filename);
+
+ /* TODO: show error dialog if file exists */
+ g_file_copy_async (self->font_file, dest_file, G_FILE_COPY_NONE, 0, NULL, NULL, NULL,
+ font_install_finished_cb, self);
+
+ g_object_unref (dest_file);
+ g_object_unref (dest_location);
+}
+
+static void
+back_button_clicked_cb (GtkButton *button,
+ gpointer user_data)
+{
+ FontViewApplication *self = user_data;
+ font_view_application_do_overview (self);
+}
+
+static void
+font_view_show_font_error (FontViewApplication *self,
+ const gchar *message)
+{
+ GtkWidget *dialog;
+
+ dialog = gtk_message_dialog_new (GTK_WINDOW (self->main_window),
+ GTK_DIALOG_MODAL,
+ GTK_MESSAGE_ERROR,
+ GTK_BUTTONS_CLOSE,
+ _("This font could not be displayed."));
+ gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog),
+ "%s",
+ message);
+ g_signal_connect (dialog, "response", G_CALLBACK (gtk_widget_destroy), NULL);
+ gtk_widget_show (dialog);
+}
+
+static void
+font_widget_error_cb (SushiFontWidget *font_widget,
+ const gchar *message,
+ gpointer user_data)
+{
+ FontViewApplication *self = user_data;
+
+ font_view_application_do_overview (self);
+ font_view_show_font_error (self, message);
+}
+
+static void
+font_widget_loaded_cb (SushiFontWidget *font_widget,
+ gpointer user_data)
+{
+ FontViewApplication *self = user_data;
+ FT_Face face = sushi_font_widget_get_ft_face (font_widget);
+ const gchar *uri;
+
+ if (face == NULL)
+ return;
+
+ uri = sushi_font_widget_get_uri (font_widget);
+ self->font_file = g_file_new_for_uri (uri);
+
+ gtk_header_bar_set_title (GTK_HEADER_BAR (self->header), face->family_name);
+ gtk_header_bar_set_subtitle (GTK_HEADER_BAR (self->header), face->style_name);
+
+ install_button_refresh_appearance (self, NULL);
+}
+
+static void
+info_button_clicked_cb (GtkButton *button,
+ gpointer user_data)
+{
+ FontViewApplication *self = user_data;
+ GtkWidget *grid, *dialog;
+ FT_Face face = sushi_font_widget_get_ft_face (SUSHI_FONT_WIDGET (self->font_widget));
+
+ if (face == NULL)
+ return;
+
+ grid = gtk_grid_new ();
+ gtk_orientable_set_orientation (GTK_ORIENTABLE (grid), GTK_ORIENTATION_VERTICAL);
+ g_object_set (grid,
+ "margin-top", 6,
+ "margin-start", 16,
+ "margin-end", 16,
+ "margin-bottom", 6,
+ NULL);
+ gtk_grid_set_column_spacing (GTK_GRID (grid), 8);
+ gtk_grid_set_row_spacing (GTK_GRID (grid), 2);
+
+ populate_grid (self, grid, face);
+
+ dialog = g_object_new (GTK_TYPE_DIALOG,
+ "title", _("Info"),
+ "transient-for", self->main_window,
+ "modal", TRUE,
+ "destroy-with-parent", TRUE,
+ "use-header-bar", TRUE,
+ NULL);
+ gtk_container_add (GTK_CONTAINER (gtk_dialog_get_content_area (GTK_DIALOG (dialog))), grid);
+ g_signal_connect (dialog, "response",
+ G_CALLBACK (gtk_widget_destroy), NULL);
+ gtk_widget_show_all (dialog);
+}
+
+static void
+font_view_update_scale_factor (FontViewApplication *self)
+{
+ gint scale_factor = gtk_widget_get_scale_factor (self->main_window);
+ font_view_model_set_scale_factor (FONT_VIEW_MODEL (self->model),
+ scale_factor);
+}
+
+static void
+font_view_ensure_model (FontViewApplication *self)
+{
+ if (self->model != NULL)
+ return;
+
+ self->model = font_view_model_new ();
+ g_signal_connect (self->model, "config-changed",
+ G_CALLBACK (font_model_config_changed_cb), self);
+
+ g_signal_connect (self->main_window, "notify::scale-factor",
+ G_CALLBACK (font_view_update_scale_factor), self);
+ font_view_update_scale_factor (self);
+}
+
+static void
+font_view_application_do_open (FontViewApplication *self,
+ GFile *file,
+ gint face_index)
+{
+ GtkWidget *back_image;
+ gchar *uri;
+
+ font_view_ensure_model (self);
+
+ /* add install button */
+ if (self->install_button == NULL) {
+ self->install_button = gtk_button_new_with_label (_("Install"));
+ gtk_widget_set_valign (self->install_button, GTK_ALIGN_CENTER);
+ gtk_style_context_add_class (gtk_widget_get_style_context (self->install_button),
+ "text-button");
+ gtk_header_bar_pack_end (GTK_HEADER_BAR (self->header), self->install_button);
+
+ g_signal_connect (self->install_button, "clicked",
+ G_CALLBACK (install_button_clicked_cb), self);
+ }
+
+ if (self->info_button == NULL) {
+ self->info_button = gtk_button_new_with_label (_("Info"));
+ gtk_widget_set_valign (self->info_button, GTK_ALIGN_CENTER);
+ gtk_style_context_add_class (gtk_widget_get_style_context (self->info_button),
+ "text-button");
+ gtk_header_bar_pack_end (GTK_HEADER_BAR (self->header), self->info_button);
+
+ g_signal_connect (self->info_button, "clicked",
+ G_CALLBACK (info_button_clicked_cb), self);
+ }
+
+ if (self->back_button == NULL) {
+ self->back_button = gtk_button_new ();
+ back_image = gtk_image_new_from_icon_name ("go-previous-symbolic",
+ GTK_ICON_SIZE_MENU);
+ gtk_button_set_image (GTK_BUTTON (self->back_button), back_image);
+ gtk_widget_set_tooltip_text (self->back_button, _("Back"));
+ gtk_widget_set_valign (self->back_button, GTK_ALIGN_CENTER);
+ gtk_style_context_add_class (gtk_widget_get_style_context (self->back_button),
+ "image-button");
+ gtk_header_bar_pack_start (GTK_HEADER_BAR (self->header), self->back_button);
+
+ g_signal_connect (self->back_button, "clicked",
+ G_CALLBACK (back_button_clicked_cb), self);
+ }
+
+ uri = g_file_get_uri (file);
+
+ if (self->font_widget == NULL) {
+ self->font_widget = GTK_WIDGET (sushi_font_widget_new (uri, face_index));
+ gtk_container_add (GTK_CONTAINER (self->swin_preview), self->font_widget);
+
+ g_signal_connect (self->font_widget, "loaded",
+ G_CALLBACK (font_widget_loaded_cb), self);
+ g_signal_connect (self->font_widget, "error",
+ G_CALLBACK (font_widget_error_cb), self);
+ } else {
+ g_object_set (self->font_widget, "uri", uri, "face-index", face_index, NULL);
+ sushi_font_widget_load (SUSHI_FONT_WIDGET (self->font_widget));
+ }
+
+ g_free (uri);
+
+ gtk_widget_show_all (self->main_window);
+ gtk_stack_set_visible_child_name (GTK_STACK (self->stack), "preview");
+}
+
+static gboolean
+icon_view_release_cb (GtkWidget *widget,
+ GdkEventButton *event,
+ gpointer user_data)
+{
+ FontViewApplication *self = user_data;
+ GtkTreePath *path;
+ GtkTreeIter iter;
+ gchar *font_path;
+ gint face_index;
+ GFile *file;
+
+ /* eat double/triple click events */
+ if (event->type != GDK_BUTTON_RELEASE)
+ return TRUE;
+
+ path = gtk_icon_view_get_path_at_pos (GTK_ICON_VIEW (widget),
+ event->x, event->y);
+
+ if (path != NULL &&
+ gtk_tree_model_get_iter (self->model, &iter, path)) {
+ gtk_tree_model_get (self->model, &iter,
+ COLUMN_PATH, &font_path,
+ COLUMN_FACE_INDEX, &face_index,
+ -1);
+
+ if (font_path != NULL) {
+ file = g_file_new_for_path (font_path);
+ font_view_application_do_open (self, file, face_index);
+ g_object_unref (file);
+ }
+ gtk_tree_path_free (path);
+ g_free (font_path);
+ }
+
+ return FALSE;
+}
+
+static void
+font_view_application_do_overview (FontViewApplication *self)
+{
+ g_clear_object (&self->font_file);
+
+ if (self->back_button) {
+ gtk_widget_destroy (self->back_button);
+ self->back_button = NULL;
+ }
+
+ if (self->info_button) {
+ gtk_widget_destroy (self->info_button);
+ self->info_button = NULL;
+ }
+
+ if (self->install_button) {
+ gtk_widget_destroy (self->install_button);
+ self->install_button = NULL;
+ }
+
+ font_view_ensure_model (self);
+
+ gtk_header_bar_set_title (GTK_HEADER_BAR (self->header), _("All Fonts"));
+ gtk_header_bar_set_subtitle (GTK_HEADER_BAR (self->header), NULL);
+
+ if (self->icon_view == NULL) {
+ GtkWidget *icon_view;
+ GtkCellRenderer *cell;
+
+ self->icon_view = icon_view = gtk_icon_view_new_with_model (self->model);
+
+ g_object_set (icon_view,
+ "column-spacing", VIEW_COLUMN_SPACING,
+ "margin", VIEW_MARGIN,
+ NULL);
+
+ gtk_widget_set_vexpand (GTK_WIDGET (icon_view), TRUE);
+ gtk_icon_view_set_selection_mode (GTK_ICON_VIEW (icon_view), GTK_SELECTION_NONE);
+ gtk_container_add (GTK_CONTAINER (self->swin_view), icon_view);
+
+ cell = gtk_cell_renderer_pixbuf_new ();
+ g_object_set (cell,
+ "xalign", 0.5,
+ "yalign", 0.5,
+ NULL);
+
+ gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (icon_view), cell, FALSE);
+ gtk_cell_layout_add_attribute (GTK_CELL_LAYOUT (icon_view), cell,
+ "surface", COLUMN_ICON);
+
+ cell = gtk_cell_renderer_text_new ();
+ g_object_set (cell,
+ "alignment", PANGO_ALIGN_CENTER,
+ "xalign", 0.5,
+ "wrap-mode", PANGO_WRAP_WORD_CHAR,
+ "wrap-width", VIEW_ITEM_WRAP_WIDTH,
+ NULL);
+ gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (icon_view), cell, FALSE);
+ gtk_cell_layout_add_attribute (GTK_CELL_LAYOUT (icon_view), cell,
+ "text", COLUMN_NAME);
+
+ g_signal_connect (icon_view, "button-release-event",
+ G_CALLBACK (icon_view_release_cb), self);
+ }
+
+ gtk_widget_show_all (self->main_window);
+ gtk_stack_set_visible_child_name (GTK_STACK (self->stack), "overview");
+}
+
+static gboolean
+font_view_window_key_press_event_cb (GtkWidget *widget,
+ GdkEventKey *event,
+ gpointer user_data)
+{
+ FontViewApplication *self = user_data;
+
+ if (event->keyval == GDK_KEY_q &&
+ (event->state & GDK_CONTROL_MASK) != 0) {
+ g_application_quit (G_APPLICATION (self));
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static void
+query_info_ready_cb (GObject *object,
+ GAsyncResult *res,
+ gpointer user_data)
+{
+ FontViewApplication *self = user_data;
+ GFileInfo *info;
+ GError *error = NULL;
+
+ ensure_window (self);
+ g_application_release (G_APPLICATION (self));
+
+ info = g_file_query_info_finish (G_FILE (object), res, &error);
+ if (error != NULL) {
+ font_view_application_do_overview (self);
+ font_view_show_font_error (self, error->message);
+ g_error_free (error);
+ } else {
+ font_view_application_do_open (self, G_FILE (object), 0);
+ }
+
+ g_clear_object (&info);
+}
+
+static void
+font_view_application_open (GApplication *application,
+ GFile **files,
+ gint n_files,
+ const gchar *hint)
+{
+ FontViewApplication *self = FONT_VIEW_APPLICATION (application);
+
+ g_application_hold (application);
+ g_file_query_info_async (files[0], G_FILE_ATTRIBUTE_STANDARD_NAME,
+ G_FILE_QUERY_INFO_NONE,
+ G_PRIORITY_DEFAULT, NULL,
+ query_info_ready_cb, self);
+}
+
+static void
+action_quit (GSimpleAction *action,
+ GVariant *parameter,
+ gpointer user_data)
+{
+ FontViewApplication *self = user_data;
+ gtk_widget_destroy (self->main_window);
+}
+
+static void
+action_about (GSimpleAction *action,
+ GVariant *parameter,
+ gpointer user_data)
+{
+ FontViewApplication *self = user_data;
+ const gchar *authors[] = {
+ "Cosimo Cecchi",
+ "James Henstridge",
+ NULL
+ };
+
+ gtk_show_about_dialog (GTK_WINDOW (self->main_window),
+ "version", VERSION,
+ "authors", authors,
+ "program-name", _("Fonts"),
+ "comments", _("View fonts on your system"),
+ "logo-icon-name", "preferences-desktop-font",
+ "translator-credits", _("translator-credits"),
+ "license-type", GTK_LICENSE_GPL_2_0,
+ "wrap-license", TRUE,
+ NULL);
+
+}
+
+static GActionEntry action_entries[] = {
+ { "about", action_about, NULL, NULL, NULL },
+ { "quit", action_quit, NULL, NULL, NULL }
+};
+
+static void
+ensure_window (FontViewApplication *self)
+{
+ GtkWidget *window, *swin;
+
+ if (self->main_window)
+ return;
+
+ self->main_window = window = gtk_application_window_new (GTK_APPLICATION (self));
+ gtk_window_set_resizable (GTK_WINDOW (window), TRUE);
+ gtk_window_set_default_size (GTK_WINDOW (window), 800, 600);
+ gtk_window_set_icon_name (GTK_WINDOW (window), "preferences-desktop-font");
+
+ self->header = gtk_header_bar_new ();
+ gtk_header_bar_set_show_close_button (GTK_HEADER_BAR (self->header), TRUE);
+ gtk_style_context_add_class (gtk_widget_get_style_context (GTK_WIDGET (self->header)),
+ "titlebar");
+ gtk_window_set_titlebar (GTK_WINDOW (self->main_window), self->header);
+
+ g_signal_connect (window, "key-press-event",
+ G_CALLBACK (font_view_window_key_press_event_cb), self);
+
+ self->main_grid = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+ gtk_container_add (GTK_CONTAINER (self->main_window), self->main_grid);
+
+ self->stack = gtk_stack_new ();
+ gtk_stack_set_transition_type (GTK_STACK (self->stack), GTK_STACK_TRANSITION_TYPE_CROSSFADE);
+ gtk_container_add (GTK_CONTAINER (self->main_grid), self->stack);
+ gtk_widget_set_hexpand (self->stack, TRUE);
+ gtk_widget_set_vexpand (self->stack, TRUE);
+
+ self->swin_view = swin = gtk_scrolled_window_new (NULL, NULL);
+ gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swin),
+ GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
+ gtk_stack_add_named (GTK_STACK (self->stack), swin, "overview");
+
+ self->swin_preview = swin = gtk_scrolled_window_new (NULL, NULL);
+ gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swin),
+ GTK_POLICY_AUTOMATIC, GTK_POLICY_NEVER);
+ gtk_stack_add_named (GTK_STACK (self->stack), swin, "preview");
+
+ gtk_widget_show_all (window);
+}
+
+static void
+font_view_application_startup (GApplication *application)
+{
+ FontViewApplication *self = FONT_VIEW_APPLICATION (application);
+ GtkBuilder *builder;
+ GMenuModel *menu;
+
+ G_APPLICATION_CLASS (font_view_application_parent_class)->startup (application);
+
+ if (!FcInit ())
+ g_critical ("Can't initialize fontconfig library");
+
+ g_action_map_add_action_entries (G_ACTION_MAP (self), action_entries,
+ G_N_ELEMENTS (action_entries), self);
+ builder = gtk_builder_new ();
+ gtk_builder_add_from_resource (builder, "/org/gnome/font-viewer/font-view-app-menu.ui", NULL);
+ menu = G_MENU_MODEL (gtk_builder_get_object (builder, "app-menu"));
+ gtk_application_set_app_menu (GTK_APPLICATION (self), menu);
+
+ g_object_unref (builder);
+ g_object_unref (menu);
+}
+
+static void
+font_view_application_activate (GApplication *application)
+{
+ FontViewApplication *self = FONT_VIEW_APPLICATION (application);
+
+ ensure_window (self);
+ font_view_application_do_overview (self);
+}
+
+static void
+font_view_application_dispose (GObject *obj)
+{
+ FontViewApplication *self = FONT_VIEW_APPLICATION (obj);
+
+ g_clear_object (&self->font_file);
+ g_clear_object (&self->model);
+
+ G_OBJECT_CLASS (font_view_application_parent_class)->dispose (obj);
+}
+
+static void
+font_view_application_init (FontViewApplication *self)
+{
+ /* do nothing */
+}
+
+static void
+font_view_application_class_init (FontViewApplicationClass *klass)
+{
+ GObjectClass *oclass = G_OBJECT_CLASS (klass);
+ GApplicationClass *aclass = G_APPLICATION_CLASS (klass);
+
+ aclass->activate = font_view_application_activate;
+ aclass->startup = font_view_application_startup;
+ aclass->open = font_view_application_open;
+
+ oclass->dispose = font_view_application_dispose;
+}
+
+static GApplication *
+font_view_application_new (void)
+{
+ return g_object_new (FONT_VIEW_TYPE_APPLICATION,
+ "application-id", "org.gnome.font-viewer",
+ "flags", G_APPLICATION_HANDLES_OPEN,
+ NULL);
+}
+
+int
+main (int argc,
+ char **argv)
+{
+ GApplication *app;
+ gint retval;
+
+ bindtextdomain (GETTEXT_PACKAGE, GNOMELOCALEDIR);
+ bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+ textdomain (GETTEXT_PACKAGE);
+
+ app = font_view_application_new ();
+ g_application_add_main_option_entries (app, goption_options);
+ retval = g_application_run (app, argc, argv);
+
+ g_object_unref (app);
+ return retval;
+}
diff --git a/src/font-view.c b/src/font-view.c
index ce5a2ca..84f71b5 100644
--- a/src/font-view.c
+++ b/src/font-view.c
@@ -34,6 +34,9 @@
#include <gio/gio.h>
#include <gtk/gtk.h>
#include <glib/gi18n.h>
+#include <hb.h>
+#include <hb-ot.h>
+#include <hb-ft.h>
#include "font-model.h"
#include "sushi-font-widget.h"
@@ -263,6 +266,126 @@ describe_instance (FT_Face face,
g_free (str);
}
+/* OpenType layout features. This list is incomplete. */
+static struct {
+ const char *tag;
+ const char *name;
+} named_features[] = {
+ { "aalt", N_("Access All Alternatives") },
+ { "ccmp", N_("Glyph Composition/Decomposition") },
+ { "dnom", N_("Denominators") },
+ { "numr", N_("Numerators") },
+ { "ordn", N_("Ordinals") },
+ { "mark", N_("Mark Positioning") },
+ { "mkmk", N_("Mark to Mark Positioning") },
+ { "rvrn", N_("Required Variation Alternates"), },
+ { "size", N_("Optical size"), },
+ { "opbd", N_("Optical Bounds"), },
+ { "lfbd", N_("Left Bounds"), },
+ { "rtbd", N_("Right Bounds"), },
+ { "rtlm", N_("Right-to-left mirrored forms"), },
+ { "mgrk", N_("Mathematical Greek") },
+ { "kern", N_("Kerning") },
+ { "liga", N_("Common Ligatures") },
+ { "dlig", N_("Discretionary Ligatures") },
+ { "hlig", N_("Historical Ligatures") },
+ { "clig", N_("Contextual Ligatures") },
+ { "smcp", N_("Small Caps") },
+ { "c2sc", N_("Small Caps from Caps") },
+ { "pcap", N_("Petite Caps") },
+ { "c2pc", N_("Caps to Petite Caps") },
+ { "unic", N_("Unicase") },
+ { "cpsp", N_("Capital Spacing") },
+ { "case", N_("Case-sensitive Forms") },
+ { "lnum", N_("Lining Numbers") },
+ { "onum", N_("Old-Style Numbers") },
+ { "pnum", N_("Proportional Numbers") },
+ { "tnum", N_("Tabular Numbers") },
+ { "frac", N_("Normal Fractions") },
+ { "afrc", N_("Alternate Fractions") },
+ { "zero", N_("Slashed Zero") },
+ { "nalt", N_("Alternative Annotations") },
+ { "sinf", N_("Scientific Inferiors") },
+ { "swsh", N_("Swash Glyphs") },
+ { "cswh", N_("Contextual Swash") },
+ { "locl", N_("Localized Forms") },
+ { "calt", N_("Contextual Alternatives") },
+ { "hist", N_("Historical Alternatives") },
+ { "salt", N_("Stylistic Alternatives") },
+ { "titl", N_("Titling Alternatives") },
+ { "rand", N_("Randomize") },
+ { "subs", N_("Subscript") },
+ { "sups", N_("Superscript") },
+ { "init", N_("Initial Forms") },
+ { "medi", N_("Medial Forms") },
+ { "fina", N_("Final Forms") },
+ { "isol", N_("Isolated Forms") },
+ { "ss01", N_("Stylistic Set 1") },
+ { "ss02", N_("Stylistic Set 2") },
+ { "ss03", N_("Stylistic Set 3") },
+ { "ss04", N_("Stylistic Set 4") },
+ { "ss05", N_("Stylistic Set 5") },
+ { "ss06", N_("Stylistic Set 6") },
+};
+
+static char *
+get_features (FT_Face face)
+{
+ hb_font_t *hb_font;
+ int i, j;
+ GString *s;
+
+ s = g_string_new ("");
+
+ hb_font = hb_ft_font_create (face, NULL);
+ if (hb_font) {
+ hb_tag_t tables[2] = { HB_OT_TAG_GSUB, HB_OT_TAG_GPOS };
+ hb_face_t *hb_face;
+
+ hb_face = hb_font_get_face (hb_font);
+
+ for (i = 0; i < 2; i++) {
+ hb_tag_t features[80];
+ unsigned int count = G_N_ELEMENTS (features);
+ unsigned int script_index = 0;
+ unsigned int lang_index = HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX;
+
+ hb_ot_layout_language_get_feature_tags (hb_face,
+ tables[i],
+ script_index,
+ lang_index,
+ 0,
+ &count,
+ features);
+ for (j = 0; j < count; j++) {
+ char buf[5];
+ const char *name;
+ int k;
+
+ hb_tag_to_string (features[j], buf); buf[4] = '\0';
+ name = buf;
+
+ for (k = 0; k < G_N_ELEMENTS (named_features); k++) {
+ if (strcmp (named_features[k].tag, buf) == 0) {
+ name = _(named_features[k].name);
+ break;
+ }
+ }
+ if (s->len > 0)
+ g_string_append (s, ", ");
+ g_string_append (s, name);
+ }
+ }
+ }
+
+ if (s->len > 0)
+ return g_string_free (s, FALSE);
+
+ g_string_free (s, TRUE);
+
+ return NULL;
+}
+
static void
populate_grid (FontViewApplication *self,
GtkWidget *grid,
@@ -398,6 +521,13 @@ populate_grid (FontViewApplication *self,
}
add_row (grid, _("Color Glyphs"), FT_HAS_COLOR (face) ? _("yes") : _("no"), FALSE);
+ {
+ char *features = get_features (face);
+ if (features)
+ add_row (grid, _("Layout Features"), features, TRUE);
+ g_free (features);
+ }
+
if (FT_Get_MM_Var (face, &ft_mm_var) == 0) {
int i;
for (i = 0; i < ft_mm_var->num_axis; i++) {
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