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/*
* Copyright (C) 2018-2020 Purism SPC
*
* SPDX-License-Identifier: LGPL-2.1+
*/
#include "config.h"
#include "hdy-main-private.h"
#include <gio/gio.h>
#include <glib/gi18n-lib.h>
#include <gtk/gtk.h>
static gint hdy_initialized = FALSE;
/**
* SECTION:hdy-main
* @short_description: Library initialization.
* @Title: hdy-main
*
* Before using the Handy library you should initialize it by calling the
* hdy_init() function.
* This makes sure translations, types, themes, and icons for the Handy library
* are set up properly.
*/
/* The style provider priority to use for libhandy widgets custom styling. It is
* higher than themes and settings, allowing to override theme defaults, but
* lower than applications and user provided styles, so application developers
* can nonetheless apply custom styling on top of it. */
#define HDY_STYLE_PROVIDER_PRIORITY_OVERRIDE (GTK_STYLE_PROVIDER_PRIORITY_SETTINGS + 1)
#define HDY_THEMES_PATH "/sm/puri/handy/themes/"
static inline gboolean
hdy_resource_exists (const gchar *resource_path)
{
return g_resources_get_info (resource_path, G_RESOURCE_LOOKUP_FLAGS_NONE, NULL, NULL, NULL);
}
static gchar *
hdy_themes_get_theme_name (gboolean *prefer_dark_theme)
{
gchar *theme_name = NULL;
gchar *p;
g_assert (prefer_dark_theme);
theme_name = g_strdup (g_getenv ("GTK_THEME"));
if (theme_name == NULL) {
g_object_get (gtk_settings_get_default (),
"gtk-theme-name", &theme_name,
"gtk-application-prefer-dark-theme", prefer_dark_theme,
NULL);
return theme_name;
}
/* Theme variants are specified with the syntax
* "<theme>:<variant>" e.g. "Adwaita:dark" */
if (NULL != (p = strrchr (theme_name, ':'))) {
*p = '\0';
p++;
*prefer_dark_theme = g_strcmp0 (p, "dark") == 0;
}
return theme_name;
}
static void
hdy_themes_update (GtkCssProvider *css_provider)
{
g_autofree gchar *theme_name = NULL;
g_autofree gchar *resource_path = NULL;
gboolean prefer_dark_theme = FALSE;
g_assert (GTK_IS_CSS_PROVIDER (css_provider));
theme_name = hdy_themes_get_theme_name (&prefer_dark_theme);
/* First check with full path to theme+variant */
resource_path = g_strdup_printf (HDY_THEMES_PATH"%s%s.css",
theme_name, prefer_dark_theme ? "-dark" : "");
if (!hdy_resource_exists (resource_path)) {
/* Now try without the theme variant */
g_free (resource_path);
resource_path = g_strdup_printf (HDY_THEMES_PATH"%s.css", theme_name);
if (!hdy_resource_exists (resource_path)) {
/* Now fallback to shared styling */
g_free (resource_path);
resource_path = g_strdup (HDY_THEMES_PATH"shared.css");
g_assert (hdy_resource_exists (resource_path));
}
}
gtk_css_provider_load_from_resource (css_provider, resource_path);
}
static void
load_fallback_style (void)
{
g_autoptr (GtkCssProvider) css_provider = NULL;
css_provider = gtk_css_provider_new ();
gtk_style_context_add_provider_for_screen (gdk_screen_get_default (),
GTK_STYLE_PROVIDER (css_provider),
GTK_STYLE_PROVIDER_PRIORITY_FALLBACK);
gtk_css_provider_load_from_resource (css_provider, HDY_THEMES_PATH"fallback.css");
}
/**
* hdy_style_init:
*
* Initializes the style classes. This must be called once GTK has been
* initialized.
*
* Since: 1.0
*/
static void
hdy_style_init (void)
{
static volatile gsize guard = 0;
g_autoptr (GtkCssProvider) css_provider = NULL;
GtkSettings *settings;
if (!g_once_init_enter (&guard))
return;
css_provider = gtk_css_provider_new ();
gtk_style_context_add_provider_for_screen (gdk_screen_get_default (),
GTK_STYLE_PROVIDER (css_provider),
HDY_STYLE_PROVIDER_PRIORITY_OVERRIDE);
settings = gtk_settings_get_default ();
g_signal_connect_swapped (settings,
"notify::gtk-theme-name",
G_CALLBACK (hdy_themes_update),
css_provider);
g_signal_connect_swapped (settings,
"notify::gtk-application-prefer-dark-theme",
G_CALLBACK (hdy_themes_update),
css_provider);
hdy_themes_update (css_provider);
load_fallback_style ();
g_once_init_leave (&guard, 1);
}
/**
* hdy_icons_init:
*
* Initializes the embedded icons. This must be called once GTK has been
* initialized.
*
* Since: 1.0
*/
static void
hdy_icons_init (void)
{
static volatile gsize guard = 0;
if (!g_once_init_enter (&guard))
return;
gtk_icon_theme_add_resource_path (gtk_icon_theme_get_default (),
"/sm/puri/handy/icons");
g_once_init_leave (&guard, 1);
}
/**
* hdy_init:
*
* Call this function just after initializing GTK, if you are using
* #GtkApplication it means it must be called when the #GApplication::startup
* signal is emitted. If libhandy has already been initialized, the function
* will simply return.
*
* This makes sure translations, types, themes, and icons for the Handy library
* are set up properly.
*/
void
hdy_init (void)
{
if (hdy_initialized)
return;
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
hdy_init_public_types ();
hdy_style_init ();
hdy_icons_init ();
hdy_initialized = TRUE;
}
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