Atlas - SDL_system_theme.c
Home / ext / SDL / src / core / linux Lines: 1 | Size: 5669 bytes [Download] [Show on GitHub] [Search similar files] [Raw] [Raw (proxy)][FILE BEGIN]1/* 2 Simple DirectMedia Layer 3 Copyright (C) 1997-2025 Sam Lantinga <[email protected]> 4 5 This software is provided 'as-is', without any express or implied 6 warranty. In no event will the authors be held liable for any damages 7 arising from the use of this software. 8 9 Permission is granted to anyone to use this software for any purpose, 10 including commercial applications, and to alter it and redistribute it 11 freely, subject to the following restrictions: 12 13 1. The origin of this software must not be misrepresented; you must not 14 claim that you wrote the original software. If you use this software 15 in a product, an acknowledgment in the product documentation would be 16 appreciated but is not required. 17 2. Altered source versions must be plainly marked as such, and must not be 18 misrepresented as being the original software. 19 3. This notice may not be removed or altered from any source distribution. 20*/ 21#include "SDL_internal.h" 22 23#include "SDL_dbus.h" 24#include "SDL_system_theme.h" 25#include "../../video/SDL_sysvideo.h" 26 27#include <unistd.h> 28 29#define PORTAL_DESTINATION "org.freedesktop.portal.Desktop" 30#define PORTAL_PATH "/org/freedesktop/portal/desktop" 31#define PORTAL_INTERFACE "org.freedesktop.portal.Settings" 32#define PORTAL_METHOD "Read" 33 34#define SIGNAL_INTERFACE "org.freedesktop.portal.Settings" 35#define SIGNAL_NAMESPACE "org.freedesktop.appearance" 36#define SIGNAL_NAME "SettingChanged" 37#define SIGNAL_KEY "color-scheme" 38 39typedef struct SystemThemeData 40{ 41 SDL_DBusContext *dbus; 42 SDL_SystemTheme theme; 43} SystemThemeData; 44 45static SystemThemeData system_theme_data; 46 47static bool DBus_ExtractThemeVariant(DBusMessageIter *iter, SDL_SystemTheme *theme) { 48 SDL_DBusContext *dbus = system_theme_data.dbus; 49 Uint32 color_scheme; 50 DBusMessageIter variant_iter; 51 52 if (dbus->message_iter_get_arg_type(iter) != DBUS_TYPE_VARIANT) 53 return false; 54 dbus->message_iter_recurse(iter, &variant_iter); 55 if (dbus->message_iter_get_arg_type(&variant_iter) != DBUS_TYPE_UINT32) 56 return false; 57 dbus->message_iter_get_basic(&variant_iter, &color_scheme); 58 switch (color_scheme) { 59 case 0: 60 *theme = SDL_SYSTEM_THEME_UNKNOWN; 61 break; 62 case 1: 63 *theme = SDL_SYSTEM_THEME_DARK; 64 break; 65 case 2: 66 *theme = SDL_SYSTEM_THEME_LIGHT; 67 break; 68 } 69 return true; 70} 71 72static DBusHandlerResult DBus_MessageFilter(DBusConnection *conn, DBusMessage *msg, void *data) { 73 SDL_DBusContext *dbus = (SDL_DBusContext *)data; 74 75 if (dbus->message_is_signal(msg, SIGNAL_INTERFACE, SIGNAL_NAME)) { 76 DBusMessageIter signal_iter; 77 const char *namespace, *key; 78 79 dbus->message_iter_init(msg, &signal_iter); 80 // Check if the parameters are what we expect 81 if (dbus->message_iter_get_arg_type(&signal_iter) != DBUS_TYPE_STRING) 82 goto not_our_signal; 83 dbus->message_iter_get_basic(&signal_iter, &namespace); 84 if (SDL_strcmp(SIGNAL_NAMESPACE, namespace) != 0) 85 goto not_our_signal; 86 87 if (!dbus->message_iter_next(&signal_iter)) 88 goto not_our_signal; 89 90 if (dbus->message_iter_get_arg_type(&signal_iter) != DBUS_TYPE_STRING) 91 goto not_our_signal; 92 dbus->message_iter_get_basic(&signal_iter, &key); 93 if (SDL_strcmp(SIGNAL_KEY, key) != 0) 94 goto not_our_signal; 95 96 if (!dbus->message_iter_next(&signal_iter)) 97 goto not_our_signal; 98 99 if (!DBus_ExtractThemeVariant(&signal_iter, &system_theme_data.theme)) 100 goto not_our_signal; 101 102 SDL_SetSystemTheme(system_theme_data.theme); 103 return DBUS_HANDLER_RESULT_HANDLED; 104 } 105not_our_signal: 106 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; 107} 108 109bool SDL_SystemTheme_Init(void) 110{ 111 SDL_DBusContext *dbus = SDL_DBus_GetContext(); 112 DBusMessage *msg; 113 static const char *namespace = SIGNAL_NAMESPACE; 114 static const char *key = SIGNAL_KEY; 115 116 system_theme_data.theme = SDL_SYSTEM_THEME_UNKNOWN; 117 system_theme_data.dbus = dbus; 118 if (!dbus) { 119 return false; 120 } 121 122 msg = dbus->message_new_method_call(PORTAL_DESTINATION, PORTAL_PATH, PORTAL_INTERFACE, PORTAL_METHOD); 123 if (msg) { 124 if (dbus->message_append_args(msg, DBUS_TYPE_STRING, &namespace, DBUS_TYPE_STRING, &key, DBUS_TYPE_INVALID)) { 125 DBusMessage *reply = dbus->connection_send_with_reply_and_block(dbus->session_conn, msg, 300, NULL); 126 if (reply) { 127 DBusMessageIter reply_iter, variant_outer_iter; 128 129 dbus->message_iter_init(reply, &reply_iter); 130 // The response has signature <<u>> 131 if (dbus->message_iter_get_arg_type(&reply_iter) != DBUS_TYPE_VARIANT) 132 goto incorrect_type; 133 dbus->message_iter_recurse(&reply_iter, &variant_outer_iter); 134 if (!DBus_ExtractThemeVariant(&variant_outer_iter, &system_theme_data.theme)) 135 goto incorrect_type; 136incorrect_type: 137 dbus->message_unref(reply); 138 } 139 } 140 dbus->message_unref(msg); 141 } 142 143 dbus->bus_add_match(dbus->session_conn, 144 "type='signal', interface='"SIGNAL_INTERFACE"'," 145 "member='"SIGNAL_NAME"', arg0='"SIGNAL_NAMESPACE"'," 146 "arg1='"SIGNAL_KEY"'", NULL); 147 dbus->connection_add_filter(dbus->session_conn, 148 &DBus_MessageFilter, dbus, NULL); 149 dbus->connection_flush(dbus->session_conn); 150 return true; 151} 152 153SDL_SystemTheme SDL_SystemTheme_Get(void) 154{ 155 return system_theme_data.theme; 156} 157[FILE END](C) 2025 0x4248 (C) 2025 4248 Media and 4248 Systems, All part of 0x4248 See LICENCE files for more information. 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