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Merge remote-tracking branch 'tinywl/master' into tinywl

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Drew DeVault 2019-01-03 09:59:34 -05:00
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tinywl
*-protocol.c
*-protocol.h

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This work is licensed under CC0, which effectively puts it in the public domain.
---
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THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED
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WAYLAND_PROTOCOLS=/usr/share/wayland-protocols
xdg-shell-protocol.h:
wayland-scanner server-header \
$(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@
xdg-shell-protocol.c: xdg-shell-protocol.h
wayland-scanner private-code \
$(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@
tinywl: tinywl.c xdg-shell-protocol.h xdg-shell-protocol.c
$(CC) $(CFLAGS) \
-g -Werror -I. \
-DWLR_USE_UNSTABLE \
$(shell pkg-config --cflags --libs wlroots) \
$(shell pkg-config --cflags --libs wayland-server) \
$(shell pkg-config --cflags --libs xkbcommon) \
-o $@ $<
clean:
rm -f tinywl xdg-shell-protocol.h xdg-shell-protocol.c
.DEFAULT_GOAL=tinywl
.PHONY: clean

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TinyWL
Tiny Wayland compositor.
Send patches to: ~sircmpwn/public-inbox@lists.sr.ht

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#define _POSIX_C_SOURCE 200112L
#include <getopt.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <unistd.h>
#include <wayland-server.h>
#include <wlr/backend.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_cursor.h>
#include <wlr/types/wlr_compositor.h>
#include <wlr/types/wlr_data_device.h>
#include <wlr/types/wlr_input_device.h>
#include <wlr/types/wlr_keyboard.h>
#include <wlr/types/wlr_linux_dmabuf_v1.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/types/wlr_output.h>
#include <wlr/types/wlr_output_layout.h>
#include <wlr/types/wlr_pointer.h>
#include <wlr/types/wlr_seat.h>
#include <wlr/types/wlr_xcursor_manager.h>
#include <wlr/types/wlr_xdg_shell.h>
#include <wlr/util/log.h>
#include <xkbcommon/xkbcommon.h>
enum tinywl_cursor_mode {
TINYWL_CURSOR_PASSTHROUGH,
TINYWL_CURSOR_MOVE,
TINYWL_CURSOR_RESIZE,
};
struct tinywl_server {
struct wl_display *wl_display;
struct wlr_backend *backend;
struct wlr_renderer *renderer;
struct wlr_xdg_shell *xdg_shell;
struct wl_listener new_xdg_surface;
struct wl_list views;
struct wlr_cursor *cursor;
struct wlr_xcursor_manager *cursor_mgr;
struct wl_listener cursor_motion;
struct wl_listener cursor_motion_absolute;
struct wl_listener cursor_button;
struct wl_listener cursor_axis;
struct wlr_seat *seat;
struct wl_listener new_input;
struct wl_listener request_cursor;
struct wl_list keyboards;
enum tinywl_cursor_mode cursor_mode;
struct tinywl_view *grabbed_view;
double grab_x, grab_y;
int grab_width, grab_height;
uint32_t resize_edges;
struct wlr_output_layout *output_layout;
struct wl_list outputs;
struct wl_listener new_output;
};
struct tinywl_output {
struct wl_list link;
struct tinywl_server *server;
struct wlr_output *wlr_output;
struct wl_listener frame;
};
struct tinywl_view {
struct wl_list link;
struct tinywl_server *server;
struct wlr_xdg_surface *xdg_surface;
struct wl_listener map;
struct wl_listener unmap;
struct wl_listener destroy;
struct wl_listener request_move;
struct wl_listener request_resize;
bool mapped;
int x, y;
};
struct tinywl_keyboard {
struct wl_list link;
struct tinywl_server *server;
struct wlr_input_device *device;
struct wl_listener modifiers;
struct wl_listener key;
};
struct tinywl_pointer {
struct wl_list link;
struct tinywl_server *server;
struct wlr_input_device *device;
};
static void focus_view(struct tinywl_view *view, struct wlr_surface *surface) {
if (view == NULL) {
return;
}
struct tinywl_server *server = view->server;
struct wlr_seat *seat = server->seat;
struct wlr_surface *prev_surface = seat->keyboard_state.focused_surface;
if (prev_surface == surface) {
return;
}
if (prev_surface) {
struct wlr_xdg_surface *previous = wlr_xdg_surface_from_wlr_surface(
seat->keyboard_state.focused_surface);
wlr_xdg_toplevel_set_activated(previous, false);
}
struct wlr_keyboard *keyboard = wlr_seat_get_keyboard(seat);
wl_list_remove(&view->link);
wl_list_insert(&server->views, &view->link);
wlr_xdg_toplevel_set_activated(view->xdg_surface, true);
wlr_seat_keyboard_notify_enter(seat, view->xdg_surface->surface,
keyboard->keycodes, keyboard->num_keycodes, &keyboard->modifiers);
}
static void keyboard_handle_modifiers(
struct wl_listener *listener, void *data) {
struct tinywl_keyboard *keyboard =
wl_container_of(listener, keyboard, modifiers);
wlr_seat_set_keyboard(keyboard->server->seat, keyboard->device);
wlr_seat_keyboard_notify_modifiers(keyboard->server->seat,
&keyboard->device->keyboard->modifiers);
}
static bool handle_keybinding(struct tinywl_server *server, xkb_keysym_t sym) {
switch (sym) {
case XKB_KEY_Escape:
wl_display_terminate(server->wl_display);
break;
case XKB_KEY_F1:
/* Cycle to the next view */
if (wl_list_length(&server->views) < 2) {
break;
}
struct tinywl_view *current_view = wl_container_of(
server->views.next, current_view, link);
struct tinywl_view *next_view = wl_container_of(
current_view->link.next, next_view, link);
focus_view(next_view, next_view->xdg_surface->surface);
/* Move the previous view to the end of the list */
wl_list_remove(&current_view->link);
wl_list_insert(server->views.prev, &current_view->link);
break;
default:
return false;
}
return true;
}
static void keyboard_handle_key(
struct wl_listener *listener, void *data) {
struct tinywl_keyboard *keyboard =
wl_container_of(listener, keyboard, key);
struct tinywl_server *server = keyboard->server;
struct wlr_event_keyboard_key *event = data;
struct wlr_seat *seat = server->seat;
uint32_t keycode = event->keycode + 8;
const xkb_keysym_t *syms;
int nsyms = xkb_state_key_get_syms(
keyboard->device->keyboard->xkb_state, keycode, &syms);
bool handled = false;
uint32_t modifiers = wlr_keyboard_get_modifiers(keyboard->device->keyboard);
if ((modifiers & WLR_MODIFIER_ALT) && event->state == WLR_KEY_PRESSED) {
for (int i = 0; i < nsyms; i++) {
handled = handle_keybinding(server, syms[i]);
}
}
if (!handled) {
wlr_seat_set_keyboard(seat, keyboard->device);
wlr_seat_keyboard_notify_key(seat, event->time_msec,
event->keycode, event->state);
}
}
static void server_new_keyboard(struct tinywl_server *server,
struct wlr_input_device *device) {
struct tinywl_keyboard *keyboard =
calloc(1, sizeof(struct tinywl_keyboard));
keyboard->server = server;
keyboard->device = device;
struct xkb_rule_names rules = { 0 };
struct xkb_context *context = xkb_context_new(XKB_CONTEXT_NO_FLAGS);
struct xkb_keymap *keymap = xkb_map_new_from_names(context, &rules,
XKB_KEYMAP_COMPILE_NO_FLAGS);
wlr_keyboard_set_keymap(device->keyboard, keymap);
xkb_keymap_unref(keymap);
xkb_context_unref(context);
wlr_keyboard_set_repeat_info(device->keyboard, 25, 600);
keyboard->modifiers.notify = keyboard_handle_modifiers;
wl_signal_add(&device->keyboard->events.modifiers, &keyboard->modifiers);
keyboard->key.notify = keyboard_handle_key;
wl_signal_add(&device->keyboard->events.key, &keyboard->key);
wlr_seat_set_keyboard(server->seat, device);
wl_list_insert(&server->keyboards, &keyboard->link);
}
static void server_new_pointer(struct tinywl_server *server,
struct wlr_input_device *device) {
wlr_cursor_attach_input_device(server->cursor, device);
}
static void server_new_input(struct wl_listener *listener, void *data) {
struct tinywl_server *server =
wl_container_of(listener, server, new_input);
struct wlr_input_device *device = data;
switch (device->type) {
case WLR_INPUT_DEVICE_KEYBOARD:
server_new_keyboard(server, device);
break;
case WLR_INPUT_DEVICE_POINTER:
server_new_pointer(server, device);
break;
}
uint32_t caps = WL_SEAT_CAPABILITY_POINTER;
if (!wl_list_empty(&server->keyboards)) {
caps |= WL_SEAT_CAPABILITY_KEYBOARD;
}
wlr_seat_set_capabilities(server->seat, caps);
}
static void seat_request_cursor(struct wl_listener *listener, void *data) {
struct tinywl_server *server = wl_container_of(
listener, server, request_cursor);
struct wlr_seat_pointer_request_set_cursor_event *event = data;
struct wlr_seat_client *focused_client =
server->seat->pointer_state.focused_client;
if (focused_client == event->seat_client) {
wlr_cursor_set_surface(server->cursor, event->surface,
event->hotspot_x, event->hotspot_y);
}
}
static bool view_at(struct tinywl_view *view,
double lx, double ly, struct wlr_surface **surface,
double *sx, double *sy) {
double view_sx = lx - view->x;
double view_sy = ly - view->y;
struct wlr_surface_state *state = &view->xdg_surface->surface->current;
double _sx, _sy;
struct wlr_surface *_surface = NULL;
_surface = wlr_xdg_surface_surface_at(
view->xdg_surface, view_sx, view_sy, &_sx, &_sy);
if (_surface != NULL) {
*sx = _sx;
*sy = _sy;
*surface = _surface;
return true;
}
return false;
}
static struct tinywl_view *desktop_view_at(
struct tinywl_server *server, double lx, double ly,
struct wlr_surface **surface, double *sx, double *sy) {
struct tinywl_view *view;
wl_list_for_each(view, &server->views, link) {
if (view_at(view, lx, ly, surface, sx, sy)) {
return view;
}
}
return NULL;
}
static void process_cursor_move(struct tinywl_server *server, uint32_t time) {
server->grabbed_view->x = server->cursor->x - server->grab_x;
server->grabbed_view->y = server->cursor->y - server->grab_y;
}
static void process_cursor_resize(struct tinywl_server *server, uint32_t time) {
struct tinywl_view *view = server->grabbed_view;
double dx = server->cursor->x - server->grab_x;
double dy = server->cursor->y - server->grab_y;
double x = view->x;
double y = view->y;
int width = server->grab_width;
int height = server->grab_height;
if (server->resize_edges & WLR_EDGE_TOP) {
y = server->grab_y + dy;
height -= dy;
if (height < 1) {
y += height;
}
} else if (server->resize_edges & WLR_EDGE_BOTTOM) {
height += dy;
}
if (server->resize_edges & WLR_EDGE_LEFT) {
x = server->grab_x + dx;
width -= dx;
if (width < 1) {
x += width;
}
} else if (server->resize_edges & WLR_EDGE_RIGHT) {
width += dx;
}
view->x = x;
view->y = y;
wlr_xdg_toplevel_set_size(view->xdg_surface, width, height);
}
static void process_cursor_motion(struct tinywl_server *server, uint32_t time) {
if (server->cursor_mode == TINYWL_CURSOR_MOVE) {
process_cursor_move(server, time);
return;
} else if (server->cursor_mode == TINYWL_CURSOR_RESIZE) {
process_cursor_resize(server, time);
return;
}
double sx, sy;
struct wlr_seat *seat = server->seat;
struct wlr_surface *surface = NULL;
struct tinywl_view *view = desktop_view_at(server,
server->cursor->x, server->cursor->y, &surface, &sx, &sy);
if (!view) {
wlr_xcursor_manager_set_cursor_image(
server->cursor_mgr, "left_ptr", server->cursor);
}
if (surface) {
bool focus_changed = seat->pointer_state.focused_surface != surface;
wlr_seat_pointer_notify_enter(seat, surface, sx, sy);
if (!focus_changed) {
wlr_seat_pointer_notify_motion(seat, time, sx, sy);
}
} else {
wlr_seat_pointer_clear_focus(seat);
}
}
static void server_cursor_motion(struct wl_listener *listener, void *data) {
struct tinywl_server *server =
wl_container_of(listener, server, cursor_motion);
struct wlr_event_pointer_motion *event = data;
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) {
struct tinywl_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) {
struct tinywl_server *server =
wl_container_of(listener, server, cursor_button);
struct wlr_event_pointer_button *event = data;
wlr_seat_pointer_notify_button(server->seat,
event->time_msec, event->button, event->state);
double sx, sy;
struct wlr_seat *seat = server->seat;
struct wlr_surface *surface;
struct tinywl_view *view = desktop_view_at(server,
server->cursor->x, server->cursor->y, &surface, &sx, &sy);
if (event->state == WLR_BUTTON_RELEASED) {
server->cursor_mode = TINYWL_CURSOR_PASSTHROUGH;
} else {
focus_view(view, surface);
}
}
static void server_cursor_axis(struct wl_listener *listener, void *data) {
struct tinywl_server *server =
wl_container_of(listener, server, cursor_axis);
struct wlr_event_pointer_axis *event = data;
wlr_seat_pointer_notify_axis(server->seat,
event->time_msec, event->orientation, event->delta,
event->delta_discrete, event->source);
}
struct render_data {
struct wlr_output *output;
struct wlr_renderer *renderer;
struct tinywl_view *view;
struct timespec *when;
};
static void render_surface(struct wlr_surface *surface,
int sx, int sy, void *data) {
struct render_data *rdata = data;
struct tinywl_view *view = rdata->view;
struct wlr_output *output = rdata->output;
struct wlr_texture *texture = wlr_surface_get_texture(surface);
if (texture == NULL) {
return;
}
double ox = 0, oy = 0;
wlr_output_layout_output_coords(
view->server->output_layout, output, &ox, &oy);
ox += view->x + sx, oy += view->y + sy;
struct wlr_box box = {
.x = ox * output->scale,
.y = oy * output->scale,
.width = surface->current.width * output->scale,
.height = surface->current.height * output->scale,
};
float matrix[9];
enum wl_output_transform transform =
wlr_output_transform_invert(surface->current.transform);
wlr_matrix_project_box(matrix, &box, transform, 0,
output->transform_matrix);
wlr_render_texture_with_matrix(rdata->renderer, texture, matrix, 1);
wlr_surface_send_frame_done(surface, rdata->when);
}
static void output_frame(struct wl_listener *listener, void *data) {
struct tinywl_output *output =
wl_container_of(listener, output, frame);
struct wlr_renderer *renderer = output->server->renderer;
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
if (!wlr_output_make_current(output->wlr_output, NULL)) {
return;
}
int width, height;
wlr_output_effective_resolution(output->wlr_output, &width, &height);
wlr_renderer_begin(renderer, width, height);
float color[4] = {0.3, 0.3, 0.3, 1.0};
wlr_renderer_clear(renderer, color);
struct tinywl_view *view;
wl_list_for_each_reverse(view, &output->server->views, link) {
if (!view->mapped) {
continue;
}
struct render_data rdata = {
.output = output->wlr_output,
.view = view,
.renderer = renderer,
.when = &now,
};
wlr_xdg_surface_for_each_surface(view->xdg_surface,
render_surface, &rdata);
}
wlr_renderer_end(renderer);
wlr_output_swap_buffers(output->wlr_output, NULL, NULL);
}
static void server_new_output(struct wl_listener *listener, void *data) {
struct tinywl_server *server =
wl_container_of(listener, server, new_output);
struct wlr_output *wlr_output = data;
if (!wl_list_empty(&wlr_output->modes)) {
struct wlr_output_mode *mode =
wl_container_of(wlr_output->modes.prev, mode, link);
wlr_output_set_mode(wlr_output, mode);
}
struct tinywl_output *output =
calloc(1, sizeof(struct tinywl_output));
output->wlr_output = wlr_output;
output->server = server;
output->frame.notify = output_frame;
wl_signal_add(&wlr_output->events.frame, &output->frame);
wl_list_insert(&server->outputs, &output->link);
wlr_output_layout_add_auto(server->output_layout, wlr_output);
wlr_output_create_global(wlr_output);
}
static void xdg_surface_map(struct wl_listener *listener, void *data) {
struct tinywl_view *view = wl_container_of(listener, view, map);
view->mapped = true;
focus_view(view, view->xdg_surface->surface);
}
static void xdg_surface_unmap(struct wl_listener *listener, void *data) {
struct tinywl_view *view = wl_container_of(listener, view, unmap);
view->mapped = false;
}
static void xdg_surface_destroy(struct wl_listener *listener, void *data) {
struct tinywl_view *view = wl_container_of(listener, view, destroy);
wl_list_remove(&view->link);
free(view);
}
static void begin_interactive(struct tinywl_view *view,
enum tinywl_cursor_mode mode, uint32_t edges) {
struct tinywl_server *server = view->server;
struct wlr_surface *focused_surface =
server->seat->pointer_state.focused_surface;
if (view->xdg_surface->surface != focused_surface) {
return;
}
server->grabbed_view = view;
server->cursor_mode = mode;
struct wlr_box geo_box;
wlr_xdg_surface_get_geometry(view->xdg_surface, &geo_box);
if (mode == TINYWL_CURSOR_MOVE) {
server->grab_x = server->cursor->x - view->x;
server->grab_y = server->cursor->y - view->y;
} else {
server->grab_x = server->cursor->x + geo_box.x;
server->grab_y = server->cursor->y + geo_box.y;
}
server->grab_width = geo_box.width;
server->grab_height = geo_box.height;
server->resize_edges = edges;
}
static void xdg_toplevel_request_move(
struct wl_listener *listener, void *data) {
struct tinywl_view *view = wl_container_of(listener, view, request_move);
begin_interactive(view, TINYWL_CURSOR_MOVE, 0);
}
static void xdg_toplevel_request_resize(
struct wl_listener *listener, void *data) {
struct wlr_xdg_toplevel_resize_event *event = data;
struct tinywl_view *view = wl_container_of(listener, view, request_resize);
begin_interactive(view, TINYWL_CURSOR_RESIZE, event->edges);
}
static void server_new_xdg_surface(struct wl_listener *listener, void *data) {
struct tinywl_server *server =
wl_container_of(listener, server, new_xdg_surface);
struct wlr_xdg_surface *xdg_surface = data;
if (xdg_surface->role != WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
return;
}
struct tinywl_view *view =
calloc(1, sizeof(struct tinywl_view));
view->server = server;
view->xdg_surface = xdg_surface;
view->map.notify = xdg_surface_map;
wl_signal_add(&xdg_surface->events.map, &view->map);
view->unmap.notify = xdg_surface_unmap;
wl_signal_add(&xdg_surface->events.unmap, &view->unmap);
view->destroy.notify = xdg_surface_destroy;
wl_signal_add(&xdg_surface->events.destroy, &view->destroy);
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);
wl_list_insert(&server->views, &view->link);
}
int main(int argc, char *argv[]) {
wlr_log_init(WLR_DEBUG, NULL);
char *startup_cmd = NULL;
int c;
while ((c = getopt(argc, argv, "s:h")) != -1) {
switch (c) {
case 's':
startup_cmd = optarg;
break;
default:
printf("Usage: %s [-s startup command]\n", argv[0]);
return 0;
}
}
if (optind < argc) {
printf("Usage: %s [-s startup command]\n", argv[0]);
return 0;
}
struct tinywl_server server;
server.wl_display = wl_display_create();
server.backend = wlr_backend_autocreate(server.wl_display, NULL);
server.renderer = wlr_backend_get_renderer(server.backend);
wlr_renderer_init_wl_display(server.renderer, server.wl_display);
wlr_compositor_create(server.wl_display, server.renderer);
wlr_linux_dmabuf_v1_create(server.wl_display, server.renderer);
wlr_data_device_manager_create(server.wl_display);
server.output_layout = wlr_output_layout_create();
wl_list_init(&server.outputs);
server.new_output.notify = server_new_output;
wl_signal_add(&server.backend->events.new_output, &server.new_output);
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);
server.cursor = wlr_cursor_create();
wlr_cursor_attach_output_layout(server.cursor, server.output_layout);
server.cursor_mgr = wlr_xcursor_manager_create(NULL, 24);
wlr_xcursor_manager_load(server.cursor_mgr, 1);
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);
wl_list_init(&server.keyboards);
server.new_input.notify = server_new_input;
wl_signal_add(&server.backend->events.new_input, &server.new_input);
server.seat = wlr_seat_create(server.wl_display, "seat0");
server.request_cursor.notify = seat_request_cursor;
wl_signal_add(&server.seat->events.request_set_cursor,
&server.request_cursor);
const char *socket = wl_display_add_socket_auto(server.wl_display);
if (!socket) {
wlr_backend_destroy(server.backend);
return 1;
}
if (!wlr_backend_start(server.backend)) {
wlr_backend_destroy(server.backend);
wl_display_destroy(server.wl_display);
return 1;
}
setenv("WAYLAND_DISPLAY", socket, true);
if (startup_cmd) {
if (fork() == 0) {
execl("/bin/sh", "/bin/sh", "-c", startup_cmd, (void *)NULL);
}
}
wl_display_run(server.wl_display);
wl_display_destroy_clients(server.wl_display);
wl_display_destroy(server.wl_display);
return 0;
}