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gimp/app/text/gimpfontfactory.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpfontfactory.c
* Copyright (C) 2003-2018 Michael Natterer <mitch@gimp.org>
*
* Partly based on code Copyright (C) Sven Neumann <sven@gimp.org>
* Manish Singh <yosh@gimp.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 3 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, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <pango/pangocairo.h>
#include <pango/pangofc-fontmap.h>
#include <gegl.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpconfig/gimpconfig.h"
#include "text-types.h"
#include "core/gimp.h"
#include "core/gimp-parallel.h"
#include "core/gimpasync.h"
#include "core/gimpasyncset.h"
#include "core/gimpcancelable.h"
#include "core/gimpcontainer.h"
#include "gimpfont.h"
#include "gimpfontfactory.h"
#include "gimp-intl.h"
/* Use fontconfig directly for speed. We can use the pango stuff when/if
* fontconfig/pango get more efficient.
*/
#define USE_FONTCONFIG_DIRECTLY
#ifdef USE_FONTCONFIG_DIRECTLY
#include <fontconfig/fontconfig.h>
#endif
#define CONF_FNAME "fonts.conf"
struct _GimpFontFactoryPrivate
{
gpointer foo; /* can't have an empty struct */
};
#define GET_PRIVATE(obj) (((GimpFontFactory *) (obj))->priv)
static void gimp_font_factory_data_init (GimpDataFactory *factory,
GimpContext *context);
static void gimp_font_factory_data_refresh (GimpDataFactory *factory,
GimpContext *context);
static void gimp_font_factory_data_save (GimpDataFactory *factory);
static void gimp_font_factory_data_cancel (GimpDataFactory *factory);
static GimpData * gimp_font_factory_data_duplicate (GimpDataFactory *factory,
GimpData *data);
static gboolean gimp_font_factory_data_delete (GimpDataFactory *factory,
GimpData *data,
gboolean delete_from_disk,
GError **error);
static void gimp_font_factory_load (GimpFontFactory *factory,
GError **error);
static gboolean gimp_font_factory_load_fonts_conf (FcConfig *config,
GFile *fonts_conf);
static void gimp_font_factory_add_directories (FcConfig *config,
GList *path,
GError **error);
static void gimp_font_factory_recursive_add_fontdir
(FcConfig *config,
GFile *file,
GError **error);
static void gimp_font_factory_load_names (GimpContainer *container,
PangoFontMap *fontmap,
PangoContext *context);
G_DEFINE_TYPE_WITH_PRIVATE (GimpFontFactory, gimp_font_factory,
GIMP_TYPE_DATA_FACTORY)
#define parent_class gimp_font_factory_parent_class
static void
gimp_font_factory_class_init (GimpFontFactoryClass *klass)
{
GimpDataFactoryClass *factory_class = GIMP_DATA_FACTORY_CLASS (klass);
factory_class->data_init = gimp_font_factory_data_init;
factory_class->data_refresh = gimp_font_factory_data_refresh;
factory_class->data_save = gimp_font_factory_data_save;
factory_class->data_cancel = gimp_font_factory_data_cancel;
factory_class->data_duplicate = gimp_font_factory_data_duplicate;
factory_class->data_delete = gimp_font_factory_data_delete;
}
static void
gimp_font_factory_init (GimpFontFactory *factory)
{
factory->priv = gimp_font_factory_get_instance_private (factory);
}
static void
gimp_font_factory_data_init (GimpDataFactory *factory,
GimpContext *context)
{
GError *error = NULL;
gimp_font_factory_load (GIMP_FONT_FACTORY (factory), &error);
if (error)
{
gimp_message_literal (gimp_data_factory_get_gimp (factory), NULL,
GIMP_MESSAGE_INFO,
error->message);
g_error_free (error);
}
}
static void
gimp_font_factory_data_refresh (GimpDataFactory *factory,
GimpContext *context)
{
GError *error = NULL;
gimp_font_factory_load (GIMP_FONT_FACTORY (factory), &error);
if (error)
{
gimp_message_literal (gimp_data_factory_get_gimp (factory), NULL,
GIMP_MESSAGE_INFO,
error->message);
g_error_free (error);
}
}
static void
gimp_font_factory_data_save (GimpDataFactory *factory)
{
/* this is not "saving" but this functions is called at the right
* time at exit to reset the config
*/
/* if font loading is in progress in another thread, do nothing. calling
* FcInitReinitialize() while loading takes place is unsafe.
*/
if (! gimp_async_set_is_empty (gimp_data_factory_get_async_set (factory)))
return;
/* Reinit the library with defaults. */
FcInitReinitialize ();
}
static void
gimp_font_factory_data_cancel (GimpDataFactory *factory)
{
GimpAsyncSet *async_set = gimp_data_factory_get_async_set (factory);
/* we can't really cancel font loading, so we just clear the async set and
* return without waiting for loading to finish. we also cancel the async
* set beforehand, as a way to signal to
* gimp_font_factory_load_async_callback() that loading was canceled and the
* factory might be dead, and that it should just do nothing.
*/
gimp_cancelable_cancel (GIMP_CANCELABLE (async_set));
gimp_async_set_clear (async_set);
}
static GimpData *
gimp_font_factory_data_duplicate (GimpDataFactory *factory,
GimpData *data)
{
return NULL;
}
static gboolean
gimp_font_factory_data_delete (GimpDataFactory *factory,
GimpData *data,
gboolean delete_from_disk,
GError **error)
{
return TRUE;
}
/* public functions */
GimpDataFactory *
gimp_font_factory_new (Gimp *gimp,
const gchar *path_property_name)
{
g_return_val_if_fail (GIMP_IS_GIMP (gimp), NULL);
g_return_val_if_fail (path_property_name != NULL, NULL);
return g_object_new (GIMP_TYPE_FONT_FACTORY,
"gimp", gimp,
"data-type", GIMP_TYPE_FONT,
"path-property-name", path_property_name,
"get-standard-func", gimp_font_get_standard,
NULL);
}
/* private functions */
static void
gimp_font_factory_load_async (GimpAsync *async,
FcConfig *config)
{
if (FcConfigBuildFonts (config))
{
gimp_async_finish (async, config);
}
else
{
FcConfigDestroy (config);
gimp_async_abort (async);
}
}
static void
gimp_font_factory_load_async_callback (GimpAsync *async,
GimpFontFactory *factory)
{
GimpContainer *container;
/* the operation was canceled and the factory might be dead (see
* gimp_font_factory_data_cancel()). bail.
*/
if (gimp_async_is_canceled (async))
return;
container = gimp_data_factory_get_container (GIMP_DATA_FACTORY (factory));
if (gimp_async_is_finished (async))
{
FcConfig *config = gimp_async_get_result (async);
PangoFontMap *fontmap;
PangoContext *context;
FcConfigSetCurrent (config);
fontmap = pango_cairo_font_map_new_for_font_type (CAIRO_FONT_TYPE_FT);
if (! fontmap)
g_error ("You are using a Pango that has been built against a cairo "
"that lacks the Freetype font backend");
pango_cairo_font_map_set_resolution (PANGO_CAIRO_FONT_MAP (fontmap),
72.0 /* FIXME */);
context = pango_font_map_create_context (fontmap);
g_object_unref (fontmap);
gimp_font_factory_load_names (container, PANGO_FONT_MAP (fontmap), context);
g_object_unref (context);
FcConfigDestroy (config);
}
gimp_container_thaw (container);
}
static void
gimp_font_factory_load (GimpFontFactory *factory,
GError **error)
{
GimpContainer *container;
Gimp *gimp;
GimpAsyncSet *async_set;
FcConfig *config;
GFile *fonts_conf;
GList *path;
GimpAsync *async;
async_set = gimp_data_factory_get_async_set (GIMP_DATA_FACTORY (factory));
if (! gimp_async_set_is_empty (async_set))
{
/* font loading is already in progress */
return;
}
container = gimp_data_factory_get_container (GIMP_DATA_FACTORY (factory));
gimp = gimp_data_factory_get_gimp (GIMP_DATA_FACTORY (factory));
if (gimp->be_verbose)
g_print ("Loading fonts\n");
config = FcInitLoadConfig ();
if (! config)
return;
fonts_conf = gimp_directory_file (CONF_FNAME, NULL);
if (! gimp_font_factory_load_fonts_conf (config, fonts_conf))
g_printerr ("%s: failed to read '%s'.\n",
G_STRFUNC, g_file_peek_path (fonts_conf));
g_object_unref (fonts_conf);
fonts_conf = gimp_sysconf_directory_file (CONF_FNAME, NULL);
if (! gimp_font_factory_load_fonts_conf (config, fonts_conf))
g_printerr ("%s: failed to read '%s'.\n",
G_STRFUNC, g_file_peek_path (fonts_conf));
g_object_unref (fonts_conf);
path = gimp_data_factory_get_data_path (GIMP_DATA_FACTORY (factory));
if (! path)
return;
gimp_container_freeze (container);
gimp_container_clear (container);
gimp_font_factory_add_directories (config, path, error);
g_list_free_full (path, (GDestroyNotify) g_object_unref);
/* We perform font cache initialization in a separate thread, so
* in the case a cache rebuild is to be done it will not block
* the UI.
*/
async = gimp_parallel_run_async_independent_full (
+10,
(GimpRunAsyncFunc) gimp_font_factory_load_async,
config);
gimp_async_add_callback_for_object (
async,
(GimpAsyncCallback) gimp_font_factory_load_async_callback,
factory,
factory);
gimp_async_set_add (async_set, async);
g_object_unref (async);
}
static gboolean
gimp_font_factory_load_fonts_conf (FcConfig *config,
GFile *fonts_conf)
{
gchar *path = g_file_get_path (fonts_conf);
gboolean ret = TRUE;
if (! FcConfigParseAndLoad (config, (const guchar *) path, FcFalse))
ret = FALSE;
g_free (path);
return ret;
}
static void
gimp_font_factory_add_directories (FcConfig *config,
GList *path,
GError **error)
{
GList *list;
for (list = path; list; list = list->next)
{
/* The configured directories must exist or be created. */
g_file_make_directory_with_parents (list->data, NULL, NULL);
/* Do not use FcConfigAppFontAddDir(). Instead use
* FcConfigAppFontAddFile() with our own recursive loop.
* Otherwise, when some fonts fail to load (e.g. permission
* issues), we end up in weird situations where the fonts are in
* the list, but are unusable and output many errors.
* See bug 748553.
*/
gimp_font_factory_recursive_add_fontdir (config, list->data, error);
}
if (error && *error)
{
gchar *font_list = g_strdup ((*error)->message);
g_clear_error (error);
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Some fonts failed to load:\n%s"), font_list);
g_free (font_list);
}
}
static void
gimp_font_factory_recursive_add_fontdir (FcConfig *config,
GFile *file,
GError **error)
{
GFileEnumerator *enumerator;
g_return_if_fail (config != NULL);
enumerator = g_file_enumerate_children (file,
G_FILE_ATTRIBUTE_STANDARD_NAME ","
G_FILE_ATTRIBUTE_STANDARD_IS_HIDDEN ","
G_FILE_ATTRIBUTE_STANDARD_TYPE ","
G_FILE_ATTRIBUTE_TIME_MODIFIED,
G_FILE_QUERY_INFO_NONE,
NULL, NULL);
if (enumerator)
{
GFileInfo *info;
while ((info = g_file_enumerator_next_file (enumerator, NULL, NULL)))
{
GFileType file_type;
GFile *child;
if (g_file_info_get_is_hidden (info))
{
g_object_unref (info);
continue;
}
file_type = g_file_info_get_file_type (info);
child = g_file_enumerator_get_child (enumerator, info);
if (file_type == G_FILE_TYPE_DIRECTORY)
{
gimp_font_factory_recursive_add_fontdir (config, child, error);
}
else if (file_type == G_FILE_TYPE_REGULAR)
{
gchar *path = g_file_get_path (child);
#ifdef G_OS_WIN32
gchar *tmp = g_win32_locale_filename_from_utf8 (path);
g_free (path);
/* XXX: g_win32_locale_filename_from_utf8() may return
* NULL. So we need to check that path is not NULL before
* trying to load with fontconfig.
*/
path = tmp;
#endif
if (! path ||
FcFalse == FcConfigAppFontAddFile (config, (const FcChar8 *) path))
{
g_printerr ("%s: adding font file '%s' failed.\n",
G_STRFUNC, path);
if (error)
{
if (*error)
{
gchar *current_message = g_strdup ((*error)->message);
g_clear_error (error);
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
"%s\n- %s", current_message, path);
g_free (current_message);
}
else
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
"- %s", path);
}
}
}
g_free (path);
}
g_object_unref (child);
g_object_unref (info);
}
g_object_unref (enumerator);
}
else
{
if (error)
{
gchar *path = g_file_get_path (file);
if (*error)
{
gchar *current_message = g_strdup ((*error)->message);
g_clear_error (error);
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
"%s\n- %s%s", current_message, path,
G_DIR_SEPARATOR_S);
g_free (current_message);
}
else
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
"- %s%s", path, G_DIR_SEPARATOR_S);
}
g_free (path);
}
}
}
static void
gimp_font_factory_add_font (GimpContainer *container,
PangoContext *context,
PangoFontDescription *desc)
{
gchar *name;
if (! desc)
return;
name = pango_font_description_to_string (desc);
/* It doesn't look like pango_font_description_to_string() could ever
* return NULL. But just to be double sure and avoid a segfault, I
* check before validating the string.
*/
if (name && strlen (name) > 0 &&
g_utf8_validate (name, -1, NULL))
{
GimpFont *font;
font = g_object_new (GIMP_TYPE_FONT,
"name", name,
"pango-context", context,
NULL);
gimp_container_add (container, GIMP_OBJECT (font));
g_object_unref (font);
}
g_free (name);
}
#ifdef USE_FONTCONFIG_DIRECTLY
/* We're really chummy here with the implementation. Oh well. */
/* This is copied straight from make_alias_description in pango, plus
* the gimp_font_list_add_font bits.
*/
static void
gimp_font_factory_make_alias (GimpContainer *container,
PangoContext *context,
const gchar *family,
gboolean bold,
gboolean italic)
{
PangoFontDescription *desc = pango_font_description_new ();
pango_font_description_set_family (desc, family);
pango_font_description_set_style (desc,
italic ?
PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL);
pango_font_description_set_variant (desc, PANGO_VARIANT_NORMAL);
pango_font_description_set_weight (desc,
bold ?
PANGO_WEIGHT_BOLD : PANGO_WEIGHT_NORMAL);
pango_font_description_set_stretch (desc, PANGO_STRETCH_NORMAL);
gimp_font_factory_add_font (container, context, desc);
pango_font_description_free (desc);
}
static void
gimp_font_factory_load_aliases (GimpContainer *container,
PangoContext *context)
{
const gchar *families[] = { "Sans-serif", "Serif", "Monospace" };
gint i;
for (i = 0; i < 3; i++)
{
gimp_font_factory_make_alias (container, context, families[i],
FALSE, FALSE);
gimp_font_factory_make_alias (container, context, families[i],
TRUE, FALSE);
gimp_font_factory_make_alias (container, context, families[i],
FALSE, TRUE);
gimp_font_factory_make_alias (container, context, families[i],
TRUE, TRUE);
}
}
static void
gimp_font_factory_load_names (GimpContainer *container,
PangoFontMap *fontmap,
PangoContext *context)
{
FcObjectSet *os;
FcPattern *pat;
FcFontSet *fontset;
gint i;
os = FcObjectSetBuild (FC_FAMILY, FC_STYLE,
FC_SLANT, FC_WEIGHT, FC_WIDTH,
NULL);
g_return_if_fail (os);
pat = FcPatternCreate ();
if (! pat)
{
FcObjectSetDestroy (os);
g_critical ("%s: FcPatternCreate() returned NULL.", G_STRFUNC);
return;
}
fontset = FcFontList (NULL, pat, os);
FcPatternDestroy (pat);
FcObjectSetDestroy (os);
g_return_if_fail (fontset);
for (i = 0; i < fontset->nfont; i++)
{
PangoFontDescription *desc;
desc = pango_fc_font_description_from_pattern (fontset->fonts[i], FALSE);
gimp_font_factory_add_font (container, context, desc);
pango_font_description_free (desc);
}
/* only create aliases if there is at least one font available */
if (fontset->nfont > 0)
gimp_font_factory_load_aliases (container, context);
FcFontSetDestroy (fontset);
}
#else /* ! USE_FONTCONFIG_DIRECTLY */
static void
gimp_font_factory_load_names (GimpContainer *container,
PangoFontMap *fontmap,
PangoContext *context)
{
PangoFontFamily **families;
PangoFontFace **faces;
gint n_families;
gint n_faces;
gint i, j;
pango_font_map_list_families (fontmap, &families, &n_families);
for (i = 0; i < n_families; i++)
{
pango_font_family_list_faces (families[i], &faces, &n_faces);
for (j = 0; j < n_faces; j++)
{
PangoFontDescription *desc;
desc = pango_font_face_describe (faces[j]);
gimp_font_factory_add_font (container, context, desc);
pango_font_description_free (desc);
}
}
g_free (families);
}
#endif /* USE_FONTCONFIG_DIRECTLY */
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