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110 lines
3.8 KiB
C
Vendored
110 lines
3.8 KiB
C
Vendored
/*
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* linux_cursor_settings.c
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* Copyright (C) 2021 Kovid Goyal <kovid at kovidgoyal.net>
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*
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* Distributed under terms of the GPL3 license.
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*/
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#include "linux_desktop_settings.h"
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#include <stdlib.h>
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#include <strings.h>
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#include <string.h>
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static const char *DESKTOP_SERVICE = "org.freedesktop.portal.Desktop";
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static const char *DESKTOP_PATH = "/org/freedesktop/portal/desktop";
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static const char *DESKTOP_INTERFACE = "org.freedesktop.portal.Settings";
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static const char *GNOME_DESKTOP_NAMESPACE = "org.gnome.desktop.interface";
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static char theme_name[64] = {0};
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static int theme_size = -1;
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static bool gnome_cursor_theme_read = false, gnome_cursor_size_read = false;
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static bool
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parse_dbus_message_for_type(DBusMessage *const reply, const char *errmsg, const int type, void *value) {
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DBusMessageIter iter[3];
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dbus_message_iter_init(reply, &iter[0]);
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#define FAIL { _glfwInputError(GLFW_PLATFORM_ERROR, "%s", errmsg); return false; }
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if (dbus_message_iter_get_arg_type(&iter[0]) != DBUS_TYPE_VARIANT) FAIL;
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dbus_message_iter_recurse(&iter[0], &iter[1]);
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if (dbus_message_iter_get_arg_type(&iter[1]) != DBUS_TYPE_VARIANT) FAIL;
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dbus_message_iter_recurse(&iter[1], &iter[2]);
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if (dbus_message_iter_get_arg_type(&iter[2]) != type) FAIL;
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dbus_message_iter_get_basic(&iter[2], value);
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return true;
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#undef FAIL
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}
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#define HANDLER(name) void name(DBusMessage *msg, const char* errmsg, void *data) { \
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(void)data; \
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if (errmsg) { \
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_glfwInputError(GLFW_PLATFORM_ERROR, "%s: failed with error: %s", #name, errmsg); \
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return; \
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}
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HANDLER(on_gnome_cursor_theme_read)
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const char *name;
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if (!parse_dbus_message_for_type(msg, "Failed to get cursor theme name from reply", DBUS_TYPE_STRING, &name)) return;
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if (name && name[0]) {
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gnome_cursor_theme_read = true;
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strncpy(theme_name, name, sizeof(theme_name) - 1);
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if (gnome_cursor_size_read) _glfwPlatformChangeCursorTheme();
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}
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}
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HANDLER(on_gnome_cursor_size_read)
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int32_t sz;
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if (!parse_dbus_message_for_type(msg, "Failed to get cursor theme size from reply", DBUS_TYPE_INT32, &sz)) return;
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gnome_cursor_size_read = true;
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theme_size = sz;
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if (gnome_cursor_theme_read) _glfwPlatformChangeCursorTheme();
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}
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#undef HANDLER
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static bool
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call_read(DBusConnection *session_bus, dbus_pending_callback callback, const char *namespace, const char *key) {
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return glfw_dbus_call_method_with_reply(
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session_bus, DESKTOP_SERVICE, DESKTOP_PATH, DESKTOP_INTERFACE, "Read", DBUS_TIMEOUT_USE_DEFAULT,
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callback, NULL, DBUS_TYPE_STRING, &namespace, DBUS_TYPE_STRING, &key, DBUS_TYPE_INVALID);
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}
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static void
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get_from_gnome(void) {
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theme_size = 32;
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DBusConnection *session_bus = glfw_dbus_session_bus();
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if (session_bus) {
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const char *theme_key = "cursor-theme";
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call_read(session_bus, on_gnome_cursor_theme_read, GNOME_DESKTOP_NAMESPACE, theme_key);
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const char *size_key = "cursor-size";
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call_read(session_bus, on_gnome_cursor_size_read, GNOME_DESKTOP_NAMESPACE, size_key);
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}
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}
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void
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glfw_current_cursor_theme(const char **theme, int *size) {
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*theme = theme_name[0] ? theme_name : NULL;
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*size = (theme_size > 0 && theme_size < 2048) ? theme_size : 32;
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}
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static void
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get_cursor_theme_from_env(void) {
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const char *q = getenv("XCURSOR_THEME");
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if (q) strncpy(theme_name, q, sizeof(theme_name)-1);
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const char *env = getenv("XCURSOR_SIZE");
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theme_size = 32;
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if (env) {
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const int retval = atoi(env);
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if (retval > 0 && retval < 2048) theme_size = retval;
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}
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}
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void
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glfw_initialize_desktop_settings(void) {
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get_cursor_theme_from_env();
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const char *desktop = getenv("XDG_CURRENT_DESKTOP");
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bool is_gnome = desktop && strncasecmp(desktop, "GNOME", sizeof("GNOME") - 1) == 0;
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if (is_gnome) get_from_gnome();
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}
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