Atlas - SDL_waylandutil.c
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1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2026 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#ifdef SDL_VIDEO_DRIVER_WAYLAND
24
25#include "SDL_waylandevents_c.h"
26#include "SDL_waylandutil.h"
27#include "xdg-activation-v1-client-protocol.h"
28
29#define WAYLAND_HANDLE_PREFIX "wayland:"
30
31typedef struct Wayland_ActivationParams
32{
33    char **token;
34    bool done;
35} Wayland_ActivationParams;
36
37static void handle_xdg_activation_done(void *data, struct xdg_activation_token_v1 *xdg_activation_token_v1, const char *token)
38{
39    Wayland_ActivationParams *activation_params = (Wayland_ActivationParams *)data;
40    *activation_params->token = SDL_strdup(token);
41    activation_params->done = true;
42
43    xdg_activation_token_v1_destroy(xdg_activation_token_v1);
44}
45
46static const struct xdg_activation_token_v1_listener xdg_activation_listener = {
47    handle_xdg_activation_done
48};
49
50bool Wayland_GetActivationTokenForExport(SDL_VideoDevice *_this, char **token, char **window_id)
51{
52    if (!_this || !token) {
53        return false;
54    }
55
56    SDL_VideoData *viddata = _this->internal;
57
58    SDL_WaylandSeat *seat = viddata->last_implicit_grab_seat;
59    SDL_WindowData *focus = NULL;
60
61    if (seat) {
62        focus = seat->keyboard.focus;
63        if (!focus) {
64            focus = seat->pointer.focus;
65        }
66    }
67
68    const char *xdg_activation_token = SDL_getenv("XDG_ACTIVATION_TOKEN");
69    if (xdg_activation_token) {
70        *token = SDL_strdup(xdg_activation_token);
71        if (!*token) {
72            return false;
73        }
74
75        // Unset the envvar after claiming the token.
76        SDL_unsetenv_unsafe("XDG_ACTIVATION_TOKEN");
77    } else if (viddata->activation_manager) {
78        struct wl_surface *requesting_surface = focus ? focus->surface : NULL;
79        Wayland_ActivationParams params = {
80            .token = token,
81            .done = false
82        };
83
84        struct wl_event_queue *activation_token_queue = Wayland_DisplayCreateQueue(viddata->display, "SDL Activation Token Generation Queue");
85
86        struct wl_proxy *activation_manager_wrapper = WAYLAND_wl_proxy_create_wrapper(viddata->activation_manager);
87        WAYLAND_wl_proxy_set_queue(activation_manager_wrapper, activation_token_queue);
88        struct xdg_activation_token_v1 *activation_token = xdg_activation_v1_get_activation_token((struct xdg_activation_v1 *)activation_manager_wrapper);
89        xdg_activation_token_v1_add_listener(activation_token, &xdg_activation_listener, &params);
90
91        if (requesting_surface) {
92            // This specifies the surface from which the activation request is originating, not the activation target surface.
93            xdg_activation_token_v1_set_surface(activation_token, requesting_surface);
94        }
95        if (seat && seat->wl_seat) {
96            xdg_activation_token_v1_set_serial(activation_token, seat->last_implicit_grab_serial, seat->wl_seat);
97        }
98        if (focus && focus->app_id) {
99            // Set the app ID for external use.
100            xdg_activation_token_v1_set_app_id(activation_token, focus->app_id);
101        }
102        xdg_activation_token_v1_commit(activation_token);
103
104        while (!params.done) {
105            WAYLAND_wl_display_dispatch_queue(viddata->display, activation_token_queue);
106        }
107        WAYLAND_wl_proxy_wrapper_destroy(activation_manager_wrapper);
108        WAYLAND_wl_event_queue_destroy(activation_token_queue);
109
110        if (!*token) {
111            return false;
112        }
113    }
114
115    if (focus && window_id) {
116        const char *id = SDL_GetStringProperty(focus->sdlwindow->props, SDL_PROP_WINDOW_WAYLAND_XDG_TOPLEVEL_EXPORT_HANDLE_STRING, NULL);
117        if (id) {
118            const size_t len = SDL_strlen(id) + sizeof(WAYLAND_HANDLE_PREFIX) + 1;
119            *window_id = SDL_malloc(len);
120            if (!*window_id) {
121                SDL_free(*token);
122                *token = NULL;
123                return false;
124            }
125
126            SDL_strlcpy(*window_id, WAYLAND_HANDLE_PREFIX, len);
127            SDL_strlcat(*window_id, id, len);
128        }
129    }
130
131    return true;
132}
133
134#endif // SDL_VIDEO_DRIVER_WAYLAND
135
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