2022-08-21 12:56:04 +01:00
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/*
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* Feynman -- Wayland compositor for GNU Emacs
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*
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* Copyright (c) 2022 Sameer Rahmani <lxsameer@gnu.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "compositor.h"
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#include <assert.h>
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2022-08-23 14:51:10 +01:00
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#include <fcntl.h>
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#include <linux/limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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2022-08-21 15:29:11 +01:00
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#include <wayland-server-core.h>
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2022-08-21 12:56:04 +01:00
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#include <wlr/backend.h>
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#include <wlr/backend/interface.h>
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#include <wlr/interfaces/wlr_output.h>
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#include <wlr/render/wlr_renderer.h>
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2022-09-05 16:09:38 +01:00
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#include <wlr/util/log.h>
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#include <xdg-shell-protocol.h>
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2022-08-23 14:51:10 +01:00
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#include <xkbcommon/xkbcommon-keysyms.h>
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2022-08-21 12:56:04 +01:00
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static void
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2022-08-21 12:56:39 +01:00
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/* cppcheck-suppress constParameter */
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2022-08-21 12:56:04 +01:00
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focus_view (struct feynman_view *view, struct wlr_surface *surface)
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{
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/* Note: this function only deals with keyboard focus. */
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if (view == NULL)
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{
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return;
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}
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struct feynman_server *server = view->server;
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struct wlr_seat *seat = server->seat;
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struct wlr_surface *prev_surface = seat->keyboard_state.focused_surface;
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if (prev_surface == surface)
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{
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/* Don't re-focus an already focused surface. */
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return;
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}
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if (prev_surface)
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{
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/*
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* Deactivate the previously focused surface. This lets the client know
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* it no longer has focus and the client will repaint accordingly, e.g.
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* stop displaying a caret.
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*/
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struct wlr_xdg_surface *previous = wlr_xdg_surface_from_wlr_surface (
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seat->keyboard_state.focused_surface);
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wlr_xdg_toplevel_set_activated (previous, false);
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}
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struct wlr_keyboard *keyboard = wlr_seat_get_keyboard (seat);
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/* Move the view to the front */
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wlr_scene_node_raise_to_top (view->scene_node);
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wl_list_remove (&view->link);
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wl_list_insert (&server->views, &view->link);
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/* Activate the new surface */
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wlr_xdg_toplevel_set_activated (view->xdg_surface, true);
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/*
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* Tell the seat to have the keyboard enter this surface. wlroots will keep
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* track of this and automatically send key events to the appropriate
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* clients without additional work on your part.
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*/
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wlr_seat_keyboard_notify_enter (seat, view->xdg_surface->surface,
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keyboard->keycodes, keyboard->num_keycodes,
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&keyboard->modifiers);
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}
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static void
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keyboard_handle_modifiers (struct wl_listener *listener, void *data)
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{
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(void)data;
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/* This event is raised when a modifier key, such as shift or alt, is
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* pressed. We simply communicate this to the client. */
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struct feynman_keyboard *keyboard
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= wl_container_of (listener, keyboard, modifiers);
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/*
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* A seat can only have one keyboard, but this is a limitation of the
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* Wayland protocol - not wlroots. We assign all connected keyboards to the
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* same seat. You can swap out the underlying wlr_keyboard like this and
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* wlr_seat handles this transparently.
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*/
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wlr_seat_set_keyboard (keyboard->server->seat, keyboard->device);
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/* Send modifiers to the client. */
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wlr_seat_keyboard_notify_modifiers (keyboard->server->seat,
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&keyboard->device->keyboard->modifiers);
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}
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static bool
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handle_keybinding (struct feynman_server *server, xkb_keysym_t sym)
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{
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/*
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* Here we handle compositor keybindings. This is when the compositor is
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* processing keys, rather than passing them on to the client for its own
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* processing.
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*
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* This function assumes Alt is held down.
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*/
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switch (sym)
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{
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case XKB_KEY_Escape:
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wl_display_terminate (server->wl_display);
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break;
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2022-08-23 14:51:10 +01:00
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case XKB_KEY_6:
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wlr_log (WLR_INFO, "Spawning Emacs...");
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pid_t pid = fork ();
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if (pid == 0)
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{
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char *emacs_dev = getenv ("EMACS_DEV");
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if (emacs_dev == NULL)
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{
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perror ("Failed to find EMACS_DEV");
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};
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int fd = open (server->log_file, O_CREAT | O_WRONLY, 0600);
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dup2 (fd, 1);
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dup2 (fd, 2);
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close (fd);
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char emacs[PATH_MAX];
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sprintf (emacs, "%s/%s", emacs_dev, "bin/emacs");
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wlr_log (WLR_INFO, "Trying Emacs at: %s", emacs);
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char *const args[] = { emacs, NULL };
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/* TODO: Set these vars accordingly on the prod build */
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2022-09-05 16:09:38 +01:00
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char *const env[] = { "WAYLAND_DISPLAY=wayland-0", "DISPLAY=:1",
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"WAYLAND_DEBUG=1", NULL };
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char *const xargs[] = { "/usr/bin/xterm", NULL };
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execve ("/usr/bin/xterm", xargs, env);
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2022-08-23 14:51:10 +01:00
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execve (emacs, args, env);
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}
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else
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{
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wlr_log (WLR_INFO, "Child: %d", pid);
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}
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break;
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case XKB_KEY_1:
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2022-08-21 12:56:04 +01:00
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/* Cycle to the next view */
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if (wl_list_length (&server->views) < 2)
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{
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break;
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}
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struct feynman_view *next_view
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= wl_container_of (server->views.prev, next_view, link);
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focus_view (next_view, next_view->xdg_surface->surface);
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break;
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default:
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return false;
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}
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return true;
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}
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static void
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keyboard_handle_key (struct wl_listener *listener, void *data)
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{
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/* This event is raised when a key is pressed or released. */
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struct feynman_keyboard *keyboard
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= wl_container_of (listener, keyboard, key);
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struct feynman_server *server = keyboard->server;
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struct wlr_event_keyboard_key *event = data;
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struct wlr_seat *seat = server->seat;
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/* Translate libinput keycode -> xkbcommon */
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uint32_t keycode = event->keycode + 8;
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/* Get a list of keysyms based on the keymap for this keyboard */
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const xkb_keysym_t *syms;
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int nsyms = xkb_state_key_get_syms (keyboard->device->keyboard->xkb_state,
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keycode, &syms);
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bool handled = false;
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uint32_t modifiers = wlr_keyboard_get_modifiers (keyboard->device->keyboard);
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if ((modifiers & WLR_MODIFIER_ALT)
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&& event->state == WL_KEYBOARD_KEY_STATE_PRESSED)
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{
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/* If alt is held down and this button was _pressed_, we attempt to
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* process it as a compositor keybinding. */
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for (int i = 0; i < nsyms; i++)
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{
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handled = handle_keybinding (server, syms[i]);
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}
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}
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if (!handled)
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{
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/* Otherwise, we pass it along to the client. */
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wlr_seat_set_keyboard (seat, keyboard->device);
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wlr_seat_keyboard_notify_key (seat, event->time_msec, event->keycode,
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event->state);
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}
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}
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static void
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server_new_keyboard (struct feynman_server *server,
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struct wlr_input_device *device)
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{
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struct feynman_keyboard *keyboard
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= calloc (1, sizeof (struct feynman_keyboard));
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keyboard->server = server;
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keyboard->device = device;
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/* We need to prepare an XKB keymap and assign it to the keyboard. This
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* assumes the defaults (e.g. layout = "us"). */
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struct xkb_context *context = xkb_context_new (XKB_CONTEXT_NO_FLAGS);
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struct xkb_keymap *keymap
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= xkb_keymap_new_from_names (context, NULL, XKB_KEYMAP_COMPILE_NO_FLAGS);
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wlr_keyboard_set_keymap (device->keyboard, keymap);
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xkb_keymap_unref (keymap);
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xkb_context_unref (context);
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wlr_keyboard_set_repeat_info (device->keyboard, 25, 600);
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/* Here we set up listeners for keyboard events. */
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keyboard->modifiers.notify = keyboard_handle_modifiers;
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wl_signal_add (&device->keyboard->events.modifiers, &keyboard->modifiers);
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keyboard->key.notify = keyboard_handle_key;
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wl_signal_add (&device->keyboard->events.key, &keyboard->key);
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wlr_seat_set_keyboard (server->seat, device);
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/* And add the keyboard to our list of keyboards */
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wl_list_insert (&server->keyboards, &keyboard->link);
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}
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static void
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server_new_pointer (struct feynman_server *server,
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struct wlr_input_device *device)
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{
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/* We don't do anything special with pointers. All of our pointer handling
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* is proxied through wlr_cursor. On another compositor, you might take this
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* opportunity to do libinput configuration on the device to set
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* acceleration, etc. */
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wlr_cursor_attach_input_device (server->cursor, device);
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}
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static void
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server_new_input (struct wl_listener *listener, void *data)
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{
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/* This event is raised by the backend when a new input device becomes
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* available. */
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struct feynman_server *server
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= wl_container_of (listener, server, new_input);
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struct wlr_input_device *device = data;
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switch (device->type)
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{
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case WLR_INPUT_DEVICE_KEYBOARD:
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server_new_keyboard (server, device);
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break;
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case WLR_INPUT_DEVICE_POINTER:
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server_new_pointer (server, device);
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break;
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default:
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break;
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}
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/* We need to let the wlr_seat know what our capabilities are, which is
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* communiciated to the client. In Feynman we always have a cursor, even if
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* there are no pointer devices, so we always include that capability. */
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uint32_t caps = WL_SEAT_CAPABILITY_POINTER;
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if (!wl_list_empty (&server->keyboards))
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{
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caps |= WL_SEAT_CAPABILITY_KEYBOARD;
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}
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wlr_seat_set_capabilities (server->seat, caps);
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}
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static void
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seat_request_cursor (struct wl_listener *listener, void *data)
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{
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struct feynman_server *server
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= wl_container_of (listener, server, request_cursor);
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/* This event is raised by the seat when a client provides a cursor image */
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struct wlr_seat_pointer_request_set_cursor_event *event = data;
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struct wlr_seat_client *focused_client
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= server->seat->pointer_state.focused_client;
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/* This can be sent by any client, so we check to make sure this one is
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* actually has pointer focus first. */
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if (focused_client == event->seat_client)
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{
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/* Once we've vetted the client, we can tell the cursor to use the
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* provided surface as the cursor image. It will set the hardware cursor
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* on the output that it's currently on and continue to do so as the
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* cursor moves between outputs. */
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wlr_cursor_set_surface (server->cursor, event->surface, event->hotspot_x,
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event->hotspot_y);
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}
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}
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static void
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seat_request_set_selection (struct wl_listener *listener, void *data)
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{
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/* This event is raised by the seat when a client wants to set the selection,
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* usually when the user copies something. wlroots allows compositors to
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* ignore such requests if they so choose, but in feynman we always honor
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*/
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struct feynman_server *server
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= wl_container_of (listener, server, request_set_selection);
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struct wlr_seat_request_set_selection_event *event = data;
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wlr_seat_set_selection (server->seat, event->source, event->serial);
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}
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static struct feynman_view *
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desktop_view_at (struct feynman_server *server, double lx, double ly,
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struct wlr_surface **surface, double *sx, double *sy)
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{
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/* This returns the topmost node in the scene at the given layout coords.
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* we only care about surface nodes as we are specifically looking for a
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* surface in the surface tree of a feynman_view. */
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struct wlr_scene_node *node
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= wlr_scene_node_at (&server->scene->node, lx, ly, sx, sy);
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if (node == NULL || node->type != WLR_SCENE_NODE_SURFACE)
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{
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return NULL;
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}
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*surface = wlr_scene_surface_from_node (node)->surface;
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/* Find the node corresponding to the feynman_view at the root of this
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* surface tree, it is the only one for which we set the data field. */
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while (node != NULL && node->data == NULL)
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{
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node = node->parent;
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}
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2022-08-21 12:56:39 +01:00
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/* cppcheck-suppress nullPointerRedundantCheck */
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2022-08-21 12:56:04 +01:00
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return node->data;
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}
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static void
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process_cursor_move (struct feynman_server *server, uint32_t time)
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|
{
|
|
|
|
(void)time;
|
|
|
|
/* Move the grabbed view to the new position. */
|
|
|
|
struct feynman_view *view = server->grabbed_view;
|
|
|
|
view->x = server->cursor->x - server->grab_x;
|
|
|
|
view->y = server->cursor->y - server->grab_y;
|
|
|
|
wlr_scene_node_set_position (view->scene_node, view->x, view->y);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
process_cursor_resize (struct feynman_server *server, uint32_t time)
|
|
|
|
{
|
|
|
|
(void)time;
|
|
|
|
/*
|
|
|
|
* Resizing the grabbed view can be a little bit complicated, because we
|
|
|
|
* could be resizing from any corner or edge. This not only resizes the view
|
|
|
|
* on one or two axes, but can also move the view if you resize from the top
|
|
|
|
* or left edges (or top-left corner).
|
|
|
|
*
|
|
|
|
* Note that I took some shortcuts here. In a more fleshed-out compositor,
|
|
|
|
* you'd wait for the client to prepare a buffer at the new size, then
|
|
|
|
* commit any movement that was prepared.
|
|
|
|
*/
|
|
|
|
struct feynman_view *view = server->grabbed_view;
|
|
|
|
double border_x = server->cursor->x - server->grab_x;
|
|
|
|
double border_y = server->cursor->y - server->grab_y;
|
|
|
|
int new_left = server->grab_geobox.x;
|
|
|
|
int new_right = server->grab_geobox.x + server->grab_geobox.width;
|
|
|
|
int new_top = server->grab_geobox.y;
|
|
|
|
int new_bottom = server->grab_geobox.y + server->grab_geobox.height;
|
|
|
|
|
|
|
|
if (server->resize_edges & WLR_EDGE_TOP)
|
|
|
|
{
|
|
|
|
new_top = border_y;
|
|
|
|
if (new_top >= new_bottom)
|
|
|
|
{
|
|
|
|
new_top = new_bottom - 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else if (server->resize_edges & WLR_EDGE_BOTTOM)
|
|
|
|
{
|
|
|
|
new_bottom = border_y;
|
|
|
|
if (new_bottom <= new_top)
|
|
|
|
{
|
|
|
|
new_bottom = new_top + 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (server->resize_edges & WLR_EDGE_LEFT)
|
|
|
|
{
|
|
|
|
new_left = border_x;
|
|
|
|
if (new_left >= new_right)
|
|
|
|
{
|
|
|
|
new_left = new_right - 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else if (server->resize_edges & WLR_EDGE_RIGHT)
|
|
|
|
{
|
|
|
|
new_right = border_x;
|
|
|
|
if (new_right <= new_left)
|
|
|
|
{
|
|
|
|
new_right = new_left + 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
struct wlr_box geo_box;
|
|
|
|
wlr_xdg_surface_get_geometry (view->xdg_surface, &geo_box);
|
|
|
|
view->x = new_left - geo_box.x;
|
|
|
|
view->y = new_top - geo_box.y;
|
|
|
|
wlr_scene_node_set_position (view->scene_node, view->x, view->y);
|
|
|
|
|
|
|
|
int new_width = new_right - new_left;
|
|
|
|
int new_height = new_bottom - new_top;
|
|
|
|
wlr_xdg_toplevel_set_size (view->xdg_surface, new_width, new_height);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
process_cursor_motion (struct feynman_server *server, uint32_t time)
|
|
|
|
{
|
|
|
|
/* If the mode is non-passthrough, delegate to those functions. */
|
|
|
|
if (server->cursor_mode == FEYNMAN_CURSOR_MOVE)
|
|
|
|
{
|
|
|
|
process_cursor_move (server, time);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
else if (server->cursor_mode == FEYNMAN_CURSOR_RESIZE)
|
|
|
|
{
|
|
|
|
process_cursor_resize (server, time);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Otherwise, find the view under the pointer and send the event along. */
|
|
|
|
double sx, sy;
|
|
|
|
struct wlr_seat *seat = server->seat;
|
|
|
|
struct wlr_surface *surface = NULL;
|
|
|
|
struct feynman_view *view = desktop_view_at (
|
|
|
|
server, server->cursor->x, server->cursor->y, &surface, &sx, &sy);
|
|
|
|
if (!view)
|
|
|
|
{
|
|
|
|
/* If there's no view under the cursor, set the cursor image to a
|
|
|
|
* default. This is what makes the cursor image appear when you move it
|
|
|
|
* around the screen, not over any views. */
|
|
|
|
wlr_xcursor_manager_set_cursor_image (server->cursor_mgr, "left_ptr",
|
|
|
|
server->cursor);
|
|
|
|
}
|
|
|
|
if (surface)
|
|
|
|
{
|
|
|
|
/*
|
|
|
|
* Send pointer enter and motion events.
|
|
|
|
*
|
|
|
|
* The enter event gives the surface "pointer focus", which is distinct
|
|
|
|
* from keyboard focus. You get pointer focus by moving the pointer over
|
|
|
|
* a window.
|
|
|
|
*
|
|
|
|
* Note that wlroots will avoid sending duplicate enter/motion events if
|
|
|
|
* the surface has already has pointer focus or if the client is already
|
|
|
|
* aware of the coordinates passed.
|
|
|
|
*/
|
|
|
|
wlr_seat_pointer_notify_enter (seat, surface, sx, sy);
|
|
|
|
wlr_seat_pointer_notify_motion (seat, time, sx, sy);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* Clear pointer focus so future button events and such are not sent to
|
|
|
|
* the last client to have the cursor over it. */
|
|
|
|
wlr_seat_pointer_clear_focus (seat);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
server_cursor_motion (struct wl_listener *listener, void *data)
|
|
|
|
{
|
|
|
|
/* This event is forwarded by the cursor when a pointer emits a _relative_
|
|
|
|
* pointer motion event (i.e. a delta) */
|
|
|
|
struct feynman_server *server
|
|
|
|
= wl_container_of (listener, server, cursor_motion);
|
|
|
|
struct wlr_event_pointer_motion *event = data;
|
|
|
|
/* The cursor doesn't move unless we tell it to. The cursor automatically
|
|
|
|
* handles constraining the motion to the output layout, as well as any
|
|
|
|
* special configuration applied for the specific input device which
|
|
|
|
* generated the event. You can pass NULL for the device if you want to move
|
|
|
|
* the cursor around without any input. */
|
|
|
|
wlr_cursor_move (server->cursor, event->device, event->delta_x,
|
|
|
|
event->delta_y);
|
|
|
|
process_cursor_motion (server, event->time_msec);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
server_cursor_motion_absolute (struct wl_listener *listener, void *data)
|
|
|
|
{
|
|
|
|
/* This event is forwarded by the cursor when a pointer emits an _absolute_
|
|
|
|
* motion event, from 0..1 on each axis. This happens, for example, when
|
|
|
|
* wlroots is running under a Wayland window rather than KMS+DRM, and you
|
|
|
|
* move the mouse over the window. You could enter the window from any edge,
|
|
|
|
* so we have to warp the mouse there. There is also some hardware which
|
|
|
|
* emits these events. */
|
|
|
|
struct feynman_server *server
|
|
|
|
= wl_container_of (listener, server, cursor_motion_absolute);
|
|
|
|
struct wlr_event_pointer_motion_absolute *event = data;
|
|
|
|
wlr_cursor_warp_absolute (server->cursor, event->device, event->x, event->y);
|
|
|
|
process_cursor_motion (server, event->time_msec);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
server_cursor_button (struct wl_listener *listener, void *data)
|
|
|
|
{
|
|
|
|
/* This event is forwarded by the cursor when a pointer emits a button
|
|
|
|
* event. */
|
|
|
|
struct feynman_server *server
|
|
|
|
= wl_container_of (listener, server, cursor_button);
|
|
|
|
struct wlr_event_pointer_button *event = data;
|
|
|
|
/* Notify the client with pointer focus that a button press has occurred */
|
|
|
|
wlr_seat_pointer_notify_button (server->seat, event->time_msec,
|
|
|
|
event->button, event->state);
|
|
|
|
double sx, sy;
|
|
|
|
struct wlr_surface *surface = NULL;
|
|
|
|
struct feynman_view *view = desktop_view_at (
|
|
|
|
server, server->cursor->x, server->cursor->y, &surface, &sx, &sy);
|
|
|
|
if (event->state == WLR_BUTTON_RELEASED)
|
|
|
|
{
|
|
|
|
/* If you released any buttons, we exit interactive move/resize mode. */
|
|
|
|
server->cursor_mode = FEYNMAN_CURSOR_PASSTHROUGH;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* Focus that client if the button was _pressed_ */
|
|
|
|
focus_view (view, surface);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
server_cursor_axis (struct wl_listener *listener, void *data)
|
|
|
|
{
|
|
|
|
/* This event is forwarded by the cursor when a pointer emits an axis event,
|
|
|
|
* for example when you move the scroll wheel. */
|
|
|
|
struct feynman_server *server
|
|
|
|
= wl_container_of (listener, server, cursor_axis);
|
|
|
|
struct wlr_event_pointer_axis *event = data;
|
|
|
|
/* Notify the client with pointer focus of the axis event. */
|
|
|
|
wlr_seat_pointer_notify_axis (server->seat, event->time_msec,
|
|
|
|
event->orientation, event->delta,
|
|
|
|
event->delta_discrete, event->source);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
server_cursor_frame (struct wl_listener *listener, void *data)
|
|
|
|
{
|
|
|
|
(void)data;
|
|
|
|
/* This event is forwarded by the cursor when a pointer emits an frame
|
|
|
|
* event. Frame events are sent after regular pointer events to group
|
|
|
|
* multiple events together. For instance, two axis events may happen at the
|
|
|
|
* same time, in which case a frame event won't be sent in between. */
|
|
|
|
struct feynman_server *server
|
|
|
|
= wl_container_of (listener, server, cursor_frame);
|
|
|
|
/* Notify the client with pointer focus of the frame event. */
|
|
|
|
wlr_seat_pointer_notify_frame (server->seat);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
output_frame (struct wl_listener *listener, void *data)
|
|
|
|
{
|
|
|
|
(void)data;
|
|
|
|
/* This function is called every time an output is ready to display a frame,
|
|
|
|
* generally at the output's refresh rate (e.g. 60Hz). */
|
|
|
|
struct feynman_output *output = wl_container_of (listener, output, frame);
|
|
|
|
struct wlr_scene *scene = output->server->scene;
|
|
|
|
|
|
|
|
struct wlr_scene_output *scene_output
|
|
|
|
= wlr_scene_get_scene_output (scene, output->wlr_output);
|
|
|
|
|
|
|
|
/* Render the scene if needed and commit the output */
|
|
|
|
wlr_scene_output_commit (scene_output);
|
|
|
|
|
|
|
|
struct timespec now;
|
|
|
|
clock_gettime (CLOCK_MONOTONIC, &now);
|
|
|
|
wlr_scene_output_send_frame_done (scene_output, &now);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
server_new_output (struct wl_listener *listener, void *data)
|
|
|
|
{
|
|
|
|
/* This event is raised by the backend when a new output (aka a display or
|
|
|
|
* monitor) becomes available. */
|
|
|
|
struct feynman_server *server
|
|
|
|
= wl_container_of (listener, server, new_output);
|
|
|
|
struct wlr_output *wlr_output = data;
|
|
|
|
|
|
|
|
/* Configures the output created by the backend to use our allocator
|
|
|
|
* and our renderer. Must be done once, before commiting the output */
|
|
|
|
wlr_output_init_render (wlr_output, server->allocator, server->renderer);
|
|
|
|
|
|
|
|
/* Some backends don't have modes. DRM+KMS does, and we need to set a mode
|
|
|
|
* before we can use the output. The mode is a tuple of (width, height,
|
|
|
|
* refresh rate), and each monitor supports only a specific set of modes. We
|
|
|
|
* just pick the monitor's preferred mode, a more sophisticated compositor
|
|
|
|
* would let the user configure it. */
|
|
|
|
if (!wl_list_empty (&wlr_output->modes))
|
|
|
|
{
|
|
|
|
struct wlr_output_mode *mode = wlr_output_preferred_mode (wlr_output);
|
|
|
|
wlr_output_set_mode (wlr_output, mode);
|
|
|
|
wlr_output_enable (wlr_output, true);
|
|
|
|
if (!wlr_output_commit (wlr_output))
|
|
|
|
{
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Allocates and configures our state for this output */
|
|
|
|
struct feynman_output *output = calloc (1, sizeof (struct feynman_output));
|
|
|
|
output->wlr_output = wlr_output;
|
|
|
|
output->server = server;
|
|
|
|
/* Sets up a listener for the frame notify event. */
|
|
|
|
output->frame.notify = output_frame;
|
|
|
|
wl_signal_add (&wlr_output->events.frame, &output->frame);
|
|
|
|
wl_list_insert (&server->outputs, &output->link);
|
|
|
|
|
|
|
|
/* Adds this to the output layout. The add_auto function arranges outputs
|
|
|
|
* from left-to-right in the order they appear. A more sophisticated
|
|
|
|
* compositor would let the user configure the arrangement of outputs in the
|
|
|
|
* layout.
|
|
|
|
*
|
|
|
|
* The output layout utility automatically adds a wl_output global to the
|
|
|
|
* display, which Wayland clients can see to find out information about the
|
|
|
|
* output (such as DPI, scale factor, manufacturer, etc).
|
|
|
|
*/
|
|
|
|
wlr_output_layout_add_auto (server->output_layout, wlr_output);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
xdg_toplevel_map (struct wl_listener *listener, void *data)
|
|
|
|
{
|
|
|
|
(void)data;
|
|
|
|
/* Called when the surface is mapped, or ready to display on-screen. */
|
|
|
|
struct feynman_view *view = wl_container_of (listener, view, map);
|
|
|
|
|
|
|
|
wl_list_insert (&view->server->views, &view->link);
|
|
|
|
|
|
|
|
focus_view (view, view->xdg_surface->surface);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
xdg_toplevel_unmap (struct wl_listener *listener, void *data)
|
|
|
|
{
|
|
|
|
(void)data;
|
|
|
|
/* Called when the surface is unmapped, and should no longer be shown. */
|
|
|
|
struct feynman_view *view = wl_container_of (listener, view, unmap);
|
|
|
|
|
|
|
|
wl_list_remove (&view->link);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
xdg_toplevel_handler (struct wl_listener *listener, void *data)
|
|
|
|
{
|
|
|
|
(void)data;
|
|
|
|
/* Called when the surface is destroyed and should never be shown again. */
|
|
|
|
struct feynman_view *view = wl_container_of (listener, view, destroy);
|
|
|
|
|
|
|
|
wl_list_remove (&view->map.link);
|
|
|
|
wl_list_remove (&view->unmap.link);
|
|
|
|
wl_list_remove (&view->destroy.link);
|
|
|
|
wl_list_remove (&view->request_move.link);
|
|
|
|
wl_list_remove (&view->request_resize.link);
|
|
|
|
|
|
|
|
free (view);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
begin_interactive (struct feynman_view *view, enum feynman_cursor_mode mode,
|
|
|
|
uint32_t edges)
|
|
|
|
{
|
|
|
|
/* This function sets up an interactive move or resize operation, where the
|
|
|
|
* compositor stops propegating pointer events to clients and instead
|
|
|
|
* consumes them itself, to move or resize windows. */
|
|
|
|
struct feynman_server *server = view->server;
|
|
|
|
struct wlr_surface *focused_surface
|
|
|
|
= server->seat->pointer_state.focused_surface;
|
|
|
|
if (view->xdg_surface->surface
|
|
|
|
!= wlr_surface_get_root_surface (focused_surface))
|
|
|
|
{
|
|
|
|
/* Deny move/resize requests from unfocused clients. */
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
server->grabbed_view = view;
|
|
|
|
server->cursor_mode = mode;
|
|
|
|
|
|
|
|
if (mode == FEYNMAN_CURSOR_MOVE)
|
|
|
|
{
|
|
|
|
server->grab_x = server->cursor->x - view->x;
|
|
|
|
server->grab_y = server->cursor->y - view->y;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
struct wlr_box geo_box;
|
|
|
|
wlr_xdg_surface_get_geometry (view->xdg_surface, &geo_box);
|
|
|
|
|
|
|
|
double border_x = (view->x + geo_box.x)
|
|
|
|
+ ((edges & WLR_EDGE_RIGHT) ? geo_box.width : 0);
|
|
|
|
double border_y = (view->y + geo_box.y)
|
|
|
|
+ ((edges & WLR_EDGE_BOTTOM) ? geo_box.height : 0);
|
|
|
|
server->grab_x = server->cursor->x - border_x;
|
|
|
|
server->grab_y = server->cursor->y - border_y;
|
|
|
|
|
|
|
|
server->grab_geobox = geo_box;
|
|
|
|
server->grab_geobox.x += view->x;
|
|
|
|
server->grab_geobox.y += view->y;
|
|
|
|
|
|
|
|
server->resize_edges = edges;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
xdg_toplevel_request_move (struct wl_listener *listener, void *data)
|
|
|
|
{
|
|
|
|
(void)data;
|
|
|
|
/* This event is raised when a client would like to begin an interactive
|
|
|
|
* move, typically because the user clicked on their client-side
|
|
|
|
* decorations. Note that a more sophisticated compositor should check the
|
|
|
|
* provided serial against a list of button press serials sent to this
|
|
|
|
* client, to prevent the client from requesting this whenever they want. */
|
|
|
|
struct feynman_view *view = wl_container_of (listener, view, request_move);
|
|
|
|
begin_interactive (view, FEYNMAN_CURSOR_MOVE, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
xdg_toplevel_request_resize (struct wl_listener *listener, void *data)
|
|
|
|
{
|
|
|
|
/* This event is raised when a client would like to begin an interactive
|
|
|
|
* resize, typically because the user clicked on their client-side
|
|
|
|
* decorations. Note that a more sophisticated compositor should check the
|
|
|
|
* provided serial against a list of button press serials sent to this
|
|
|
|
* client, to prevent the client from requesting this whenever they want. */
|
|
|
|
struct wlr_xdg_toplevel_resize_event *event = data;
|
|
|
|
struct feynman_view *view = wl_container_of (listener, view, request_resize);
|
|
|
|
begin_interactive (view, FEYNMAN_CURSOR_RESIZE, event->edges);
|
|
|
|
}
|
|
|
|
|
2022-09-05 16:09:38 +01:00
|
|
|
static void
|
|
|
|
xdg_configure_top_level (struct wl_listener *listener, void *data)
|
|
|
|
{
|
|
|
|
|
|
|
|
struct feynman_server *server
|
|
|
|
= wl_container_of (listener, server, new_xdg_surface);
|
|
|
|
|
|
|
|
struct wlr_xdg_surface *xdg_surface = data;
|
|
|
|
wlr_log (WLR_INFO, "Configure method for '%d:%d'",
|
|
|
|
wl_resource_get_id(xdg_surface->resource),
|
|
|
|
wl_resource_get_id(xdg_surface->surface->resource));
|
|
|
|
if (xdg_surface->surface->role != WLR_XDG_SURFACE_ROLE_TOPLEVEL)
|
|
|
|
{
|
|
|
|
wlr_log (WLR_INFO, "Surface '%d' role is '%d:%d' and not '%d'",
|
|
|
|
wl_resource_get_id(xdg_surface->resource),
|
|
|
|
xdg_surface->role,
|
|
|
|
WLR_XDG_SURFACE_ROLE_TOPLEVEL);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
wlr_xdg_toplevel_set_size (xdg_surface, 400, 400);
|
|
|
|
};
|
|
|
|
|
2022-08-21 12:56:04 +01:00
|
|
|
static void
|
|
|
|
server_new_xdg_surface (struct wl_listener *listener, void *data)
|
|
|
|
{
|
|
|
|
/* This event is raised when wlr_xdg_shell receives a new xdg surface from a
|
|
|
|
* client, either a toplevel (application window) or popup. */
|
|
|
|
struct feynman_server *server
|
|
|
|
= wl_container_of (listener, server, new_xdg_surface);
|
|
|
|
struct wlr_xdg_surface *xdg_surface = data;
|
2022-09-05 16:09:38 +01:00
|
|
|
wlr_log (WLR_INFO, "New surface '%d', role '%d'",
|
|
|
|
xdg_surface->resource->object.id, xdg_surface->role);
|
2022-08-21 12:56:04 +01:00
|
|
|
/* We must add xdg popups to the scene graph so they get rendered. The
|
|
|
|
* wlroots scene graph provides a helper for this, but to use it we must
|
|
|
|
* provide the proper parent scene node of the xdg popup. To enable this,
|
|
|
|
* we always set the user data field of xdg_surfaces to the corresponding
|
|
|
|
* scene node. */
|
|
|
|
if (xdg_surface->role == WLR_XDG_SURFACE_ROLE_POPUP)
|
|
|
|
{
|
|
|
|
struct wlr_xdg_surface *parent
|
|
|
|
= wlr_xdg_surface_from_wlr_surface (xdg_surface->popup->parent);
|
|
|
|
struct wlr_scene_node *parent_node = parent->data;
|
|
|
|
xdg_surface->data
|
|
|
|
= wlr_scene_xdg_surface_create (parent_node, xdg_surface);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
assert (xdg_surface->role == WLR_XDG_SURFACE_ROLE_TOPLEVEL);
|
|
|
|
|
|
|
|
/* Allocate a feynman_view for this surface */
|
|
|
|
struct feynman_view *view = calloc (1, sizeof (struct feynman_view));
|
2022-09-05 16:09:38 +01:00
|
|
|
|
|
|
|
view->server = server;
|
|
|
|
view->xdg_surface = xdg_surface;
|
|
|
|
view->scene_node = wlr_scene_xdg_surface_create (&view->server->scene->node,
|
|
|
|
view->xdg_surface);
|
|
|
|
|
|
|
|
|
2022-08-21 12:56:04 +01:00
|
|
|
view->scene_node->data = view;
|
|
|
|
xdg_surface->data = view->scene_node;
|
|
|
|
|
2022-09-05 16:09:38 +01:00
|
|
|
|
|
|
|
wlr_log (WLR_INFO, "Setup the listeners for '%d:%d'",
|
|
|
|
wl_resource_get_id(xdg_surface->resource),
|
|
|
|
wl_resource_get_id(xdg_surface->surface->resource));
|
|
|
|
|
2022-08-21 12:56:04 +01:00
|
|
|
/* Listen to the various events it can emit */
|
2022-09-05 16:09:38 +01:00
|
|
|
view->configure.notify = xdg_configure_top_level;
|
|
|
|
wl_signal_add (&xdg_surface->events.configure, &view->configure);
|
|
|
|
|
2022-08-21 12:56:04 +01:00
|
|
|
view->map.notify = xdg_toplevel_map;
|
|
|
|
wl_signal_add (&xdg_surface->events.map, &view->map);
|
|
|
|
view->unmap.notify = xdg_toplevel_unmap;
|
|
|
|
wl_signal_add (&xdg_surface->events.unmap, &view->unmap);
|
|
|
|
view->destroy.notify = xdg_toplevel_handler;
|
|
|
|
wl_signal_add (&xdg_surface->events.destroy, &view->destroy);
|
|
|
|
|
|
|
|
/* cotd */
|
|
|
|
struct wlr_xdg_toplevel *toplevel = xdg_surface->toplevel;
|
|
|
|
view->request_move.notify = xdg_toplevel_request_move;
|
|
|
|
wl_signal_add (&toplevel->events.request_move, &view->request_move);
|
|
|
|
view->request_resize.notify = xdg_toplevel_request_resize;
|
|
|
|
wl_signal_add (&toplevel->events.request_resize, &view->request_resize);
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
2022-08-23 14:51:10 +01:00
|
|
|
init_feynman_server (struct feynman_server *server)
|
2022-08-21 12:56:04 +01:00
|
|
|
{
|
|
|
|
wlr_log_init (WLR_DEBUG, NULL);
|
|
|
|
|
|
|
|
/* The Wayland display is managed by libwayland. It handles accepting
|
|
|
|
* clients from the Unix socket, manging Wayland globals, and so on. */
|
|
|
|
server->wl_display = wl_display_create ();
|
|
|
|
/* The backend is a wlroots feature which abstracts the underlying input and
|
|
|
|
* output hardware. The autocreate option will choose the most suitable
|
|
|
|
* backend based on the current environment, such as opening an X11 window
|
|
|
|
* if an X11 server is running. */
|
|
|
|
server->backend = wlr_backend_autocreate (server->wl_display);
|
|
|
|
|
|
|
|
/* Autocreates a renderer, either Pixman, GLES2 or Vulkan for us. The user
|
|
|
|
* can also specify a renderer using the WLR_RENDERER env var.
|
|
|
|
* The renderer is responsible for defining the various pixel formats it
|
|
|
|
* supports for shared memory, this configures that for clients. */
|
|
|
|
server->renderer = wlr_renderer_autocreate (server->backend);
|
|
|
|
wlr_renderer_init_wl_display (server->renderer, server->wl_display);
|
|
|
|
|
|
|
|
/* Autocreates an allocator for us.
|
|
|
|
* The allocator is the bridge between the renderer and the backend. It
|
|
|
|
* handles the buffer creation, allowing wlroots to render onto the
|
|
|
|
* screen */
|
|
|
|
server->allocator
|
|
|
|
= wlr_allocator_autocreate (server->backend, server->renderer);
|
|
|
|
|
|
|
|
/* This creates some hands-off wlroots interfaces. The compositor is
|
|
|
|
* necessary for clients to allocate surfaces and the data device manager
|
|
|
|
* handles the clipboard. Each of these wlroots interfaces has room for you
|
|
|
|
* to dig your fingers in and play with their behavior if you want. Note that
|
|
|
|
* the clients cannot set the selection directly without compositor approval,
|
|
|
|
* see the handling of the request_set_selection event below.*/
|
|
|
|
wlr_compositor_create (server->wl_display, server->renderer);
|
|
|
|
wlr_data_device_manager_create (server->wl_display);
|
|
|
|
|
|
|
|
/* Creates an output layout, which a wlroots utility for working with an
|
|
|
|
* arrangement of screens in a physical layout. */
|
|
|
|
server->output_layout = wlr_output_layout_create ();
|
|
|
|
|
|
|
|
/* Configure a listener to be notified when new outputs are available on the
|
|
|
|
* backend. */
|
|
|
|
wl_list_init (&server->outputs);
|
|
|
|
server->new_output.notify = server_new_output;
|
|
|
|
wl_signal_add (&server->backend->events.new_output, &server->new_output);
|
|
|
|
|
|
|
|
/* Create a scene graph. This is a wlroots abstraction that handles all
|
|
|
|
* rendering and damage tracking. All the compositor author needs to do
|
|
|
|
* is add things that should be rendered to the scene graph at the proper
|
|
|
|
* positions and then call wlr_scene_output_commit() to render a frame if
|
|
|
|
* necessary.
|
|
|
|
*/
|
|
|
|
server->scene = wlr_scene_create ();
|
|
|
|
wlr_scene_attach_output_layout (server->scene, server->output_layout);
|
|
|
|
|
|
|
|
/* Set up the xdg-shell. The xdg-shell is a Wayland protocol which is used
|
|
|
|
* for application windows. For more detail on shells, refer to my article:
|
|
|
|
*
|
|
|
|
* https://drewdevault.com/2018/07/29/Wayland-shells.html
|
|
|
|
*/
|
|
|
|
wl_list_init (&server->views);
|
|
|
|
server->xdg_shell = wlr_xdg_shell_create (server->wl_display);
|
|
|
|
server->new_xdg_surface.notify = server_new_xdg_surface;
|
|
|
|
wl_signal_add (&server->xdg_shell->events.new_surface,
|
|
|
|
&server->new_xdg_surface);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Creates a cursor, which is a wlroots utility for tracking the cursor
|
|
|
|
* image shown on screen.
|
|
|
|
*/
|
|
|
|
server->cursor = wlr_cursor_create ();
|
|
|
|
wlr_cursor_attach_output_layout (server->cursor, server->output_layout);
|
|
|
|
|
|
|
|
/* Creates an xcursor manager, another wlroots utility which loads up
|
|
|
|
* Xcursor themes to source cursor images from and makes sure that cursor
|
|
|
|
* images are available at all scale factors on the screen (necessary for
|
|
|
|
* HiDPI support). We add a cursor theme at scale factor 1 to begin with. */
|
|
|
|
server->cursor_mgr = wlr_xcursor_manager_create (NULL, 24);
|
|
|
|
wlr_xcursor_manager_load (server->cursor_mgr, 1);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* wlr_cursor *only* displays an image on screen. It does not move around
|
|
|
|
* when the pointer moves. However, we can attach input devices to it, and
|
|
|
|
* it will generate aggregate events for all of them. In these events, we
|
|
|
|
* can choose how we want to process them, forwarding them to clients and
|
|
|
|
* moving the cursor around. More detail on this process is described in my
|
|
|
|
* input handling blog post:
|
|
|
|
*
|
|
|
|
* https://drewdevault.com/2018/07/17/Input-handling-in-wlroots.html
|
|
|
|
*
|
|
|
|
* And more comments are sprinkled throughout the notify functions above.
|
|
|
|
*/
|
|
|
|
server->cursor_motion.notify = server_cursor_motion;
|
|
|
|
wl_signal_add (&server->cursor->events.motion, &server->cursor_motion);
|
|
|
|
server->cursor_motion_absolute.notify = server_cursor_motion_absolute;
|
|
|
|
wl_signal_add (&server->cursor->events.motion_absolute,
|
|
|
|
&server->cursor_motion_absolute);
|
|
|
|
server->cursor_button.notify = server_cursor_button;
|
|
|
|
wl_signal_add (&server->cursor->events.button, &server->cursor_button);
|
|
|
|
server->cursor_axis.notify = server_cursor_axis;
|
|
|
|
wl_signal_add (&server->cursor->events.axis, &server->cursor_axis);
|
|
|
|
server->cursor_frame.notify = server_cursor_frame;
|
|
|
|
wl_signal_add (&server->cursor->events.frame, &server->cursor_frame);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Configures a seat, which is a single "seat" at which a user sits and
|
|
|
|
* operates the computer. This conceptually includes up to one keyboard,
|
|
|
|
* pointer, touch, and drawing tablet device. We also rig up a listener to
|
|
|
|
* let us know when new input devices are available on the backend.
|
|
|
|
*/
|
|
|
|
wl_list_init (&server->keyboards);
|
|
|
|
server->new_input.notify = server_new_input;
|
|
|
|
wl_signal_add (&server->backend->events.new_input, &server->new_input);
|
2022-08-21 12:56:39 +01:00
|
|
|
server->seat = wlr_seat_create (server->wl_display, "seat0");
|
2022-08-21 12:56:04 +01:00
|
|
|
server->request_cursor.notify = seat_request_cursor;
|
|
|
|
wl_signal_add (&server->seat->events.request_set_cursor,
|
|
|
|
&server->request_cursor);
|
|
|
|
server->request_set_selection.notify = seat_request_set_selection;
|
|
|
|
wl_signal_add (&server->seat->events.request_set_selection,
|
|
|
|
&server->request_set_selection);
|
|
|
|
|
|
|
|
/* Add a Unix socket to the Wayland display. */
|
|
|
|
const char *socket = wl_display_add_socket_auto (server->wl_display);
|
|
|
|
if (!socket)
|
|
|
|
{
|
|
|
|
wlr_backend_destroy (server->backend);
|
2022-08-23 14:51:10 +01:00
|
|
|
wlr_log (WLR_ERROR, "Failed to create a unix socket!");
|
2022-08-21 12:56:04 +01:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Start the backend. This will enumerate outputs and inputs, become the DRM
|
|
|
|
* master, etc */
|
|
|
|
if (!wlr_backend_start (server->backend))
|
|
|
|
{
|
|
|
|
wlr_backend_destroy (server->backend);
|
|
|
|
wl_display_destroy (server->wl_display);
|
2022-08-23 14:51:10 +01:00
|
|
|
wlr_log (WLR_ERROR, "Couldn't start the backend");
|
2022-08-21 12:56:04 +01:00
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Set the WAYLAND_DISPLAY environment variable to our socket */
|
|
|
|
setenv ("WAYLAND_DISPLAY", socket, true);
|
|
|
|
|
2022-08-23 14:51:10 +01:00
|
|
|
/* TODO: Move this to a function and read it from a file as well */
|
|
|
|
char *log_file = getenv ("FEYNMAN_LOG");
|
|
|
|
if (log_file == NULL)
|
|
|
|
{
|
|
|
|
char *homedir = getenv ("HOME");
|
|
|
|
if (homedir == NULL)
|
|
|
|
{
|
|
|
|
perror ("HOME is not set!!!");
|
|
|
|
}
|
|
|
|
char log[PATH_MAX];
|
|
|
|
sprintf (log, "%s/.feynman.log", homedir);
|
|
|
|
strcpy (&server->log_file[0], &log[0]);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
strcpy (&server->log_file[0], log_file);
|
|
|
|
}
|
|
|
|
|
2022-08-21 12:56:04 +01:00
|
|
|
/* Run the Wayland event loop. This does not return until you exit the
|
|
|
|
* compositor. Starting the backend rigged up all of the necessary event
|
|
|
|
* loop configuration to listen to libinput events, DRM events, generate
|
|
|
|
* frame events at the refresh rate, and so on. */
|
|
|
|
wlr_log (WLR_INFO, "Running Wayland compositor on WAYLAND_DISPLAY=%s",
|
|
|
|
socket);
|
2022-08-23 14:51:10 +01:00
|
|
|
wlr_log (WLR_INFO, "Log file '%s'", server->log_file);
|
2022-08-21 12:56:04 +01:00
|
|
|
|
2022-08-21 13:09:25 +01:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2022-08-21 15:29:11 +01:00
|
|
|
void
|
|
|
|
start_feynman (struct feynman_server *server)
|
|
|
|
{
|
|
|
|
assert (server);
|
|
|
|
wl_display_run (server->wl_display);
|
|
|
|
}
|
|
|
|
|
2022-08-21 13:09:25 +01:00
|
|
|
void
|
2022-08-23 14:51:10 +01:00
|
|
|
stop_feynman (struct feynman_server *server)
|
2022-08-21 13:09:25 +01:00
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{
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2022-08-23 14:51:10 +01:00
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// wl_display_terminate (server->wl_display);
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2022-08-21 12:56:04 +01:00
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/* Once wl_display_run returns, we shut down the server-> */
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wl_display_destroy_clients (server->wl_display);
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wl_display_destroy (server->wl_display);
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}
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