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tinywl: stop using the word "view" to refer to toplevels

Browse source 
"View" has been cargo-culted from Weston. In Weston, a view is not
even necessarily a toplevel -- it's just a way to draw an arbitrary
somewhere (a surface may be painted at multiple locations
simultaneously). The Weston concept has been misunderstood and then
was carried over to rootston, Sway, and tinywl.

Let's just use the official Wayland wording instead.
This commit is contained in:
Simon Ser 2023-11-14 17:22:16 +01:00
parent 9e5d0f95f8
commit 73ab5246ea
1 changed files with 104 additions and 104 deletions
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208
tinywl/tinywl.c
View file

@ -43,7 +43,7 @@ struct tinywl_server {
struct wlr_xdg_shell *xdg_shell;
struct wl_listener new_xdg_surface;
struct wl_list views;
struct wl_list toplevels;
struct wlr_cursor *cursor;
struct wlr_xcursor_manager *cursor_mgr;
@ -59,7 +59,7 @@ struct tinywl_server {
struct wl_listener request_set_selection;
struct wl_list keyboards;
enum tinywl_cursor_mode cursor_mode;
struct tinywl_view *grabbed_view;
struct tinywl_toplevel *grabbed_toplevel;
double grab_x, grab_y;
struct wlr_box grab_geobox;
uint32_t resize_edges;
@ -78,7 +78,7 @@ struct tinywl_output {
struct wl_listener destroy;
};
struct tinywl_view {
struct tinywl_toplevel {
struct wl_list link;
struct tinywl_server *server;
struct wlr_xdg_toplevel *xdg_toplevel;
@ -102,12 +102,12 @@ struct tinywl_keyboard {
struct wl_listener destroy;
};
static void focus_view(struct tinywl_view *view, struct wlr_surface *surface) {
static void focus_toplevel(struct tinywl_toplevel *toplevel, struct wlr_surface *surface) {
/* Note: this function only deals with keyboard focus. */
if (view == NULL) {
if (toplevel == NULL) {
return;
}
struct tinywl_server *server = view->server;
struct tinywl_server *server = toplevel->server;
struct wlr_seat *seat = server->seat;
struct wlr_surface *prev_surface = seat->keyboard_state.focused_surface;
if (prev_surface == surface) {
@ -127,19 +127,19 @@ static void focus_view(struct tinywl_view *view, struct wlr_surface *surface) {
}
}
struct wlr_keyboard *keyboard = wlr_seat_get_keyboard(seat);
/* Move the view to the front */
wlr_scene_node_raise_to_top(&view->scene_tree->node);
wl_list_remove(&view->link);
wl_list_insert(&server->views, &view->link);
/* Move the toplevel to the front */
wlr_scene_node_raise_to_top(&toplevel->scene_tree->node);
wl_list_remove(&toplevel->link);
wl_list_insert(&server->toplevels, &toplevel->link);
/* Activate the new surface */
wlr_xdg_toplevel_set_activated(view->xdg_toplevel, true);
wlr_xdg_toplevel_set_activated(toplevel->xdg_toplevel, true);
/*
* Tell the seat to have the keyboard enter this surface. wlroots will keep
* track of this and automatically send key events to the appropriate
* clients without additional work on your part.
*/
if (keyboard != NULL) {
wlr_seat_keyboard_notify_enter(seat, view->xdg_toplevel->base->surface,
wlr_seat_keyboard_notify_enter(seat, toplevel->xdg_toplevel->base->surface,
keyboard->keycodes, keyboard->num_keycodes, &keyboard->modifiers);
}
}
@ -175,13 +175,13 @@ static bool handle_keybinding(struct tinywl_server *server, xkb_keysym_t sym) {
wl_display_terminate(server->wl_display);
break;
case XKB_KEY_F1:
/* Cycle to the next view */
if (wl_list_length(&server->views) < 2) {
/* Cycle to the next toplevel */
if (wl_list_length(&server->toplevels) < 2) {
break;
}
struct tinywl_view *next_view = wl_container_of(
server->views.prev, next_view, link);
focus_view(next_view, next_view->xdg_toplevel->base->surface);
struct tinywl_toplevel *next_toplevel =
wl_container_of(server->toplevels.prev, next_toplevel, link);
focus_toplevel(next_toplevel, next_toplevel->xdg_toplevel->base->surface);
break;
default:
return false;
@ -336,12 +336,12 @@ static void seat_request_set_selection(struct wl_listener *listener, void *data)
wlr_seat_set_selection(server->seat, event->source, event->serial);
}
static struct tinywl_view *desktop_view_at(
static struct tinywl_toplevel *desktop_toplevel_at(
struct tinywl_server *server, double lx, double ly,
struct wlr_surface **surface, double *sx, double *sy) {
/* This returns the topmost node in the scene at the given layout coords.
* we only care about surface nodes as we are specifically looking for a
* surface in the surface tree of a tinywl_view. */
* We only care about surface nodes as we are specifically looking for a
* surface in the surface tree of a tinywl_toplevel. */
struct wlr_scene_node *node = wlr_scene_node_at(
&server->scene->tree.node, lx, ly, sx, sy);
if (node == NULL || node->type != WLR_SCENE_NODE_BUFFER) {
@ -355,7 +355,7 @@ static struct tinywl_view *desktop_view_at(
}
*surface = scene_surface->surface;
/* Find the node corresponding to the tinywl_view at the root of this
/* Find the node corresponding to the tinywl_toplevel at the root of this
* surface tree, it is the only one for which we set the data field. */
struct wlr_scene_tree *tree = node->parent;
while (tree != NULL && tree->node.data == NULL) {
@ -367,29 +367,29 @@ static struct tinywl_view *desktop_view_at(
static void reset_cursor_mode(struct tinywl_server *server) {
/* Reset the cursor mode to passthrough. */
server->cursor_mode = TINYWL_CURSOR_PASSTHROUGH;
server->grabbed_view = NULL;
server->grabbed_toplevel = NULL;
}
static void process_cursor_move(struct tinywl_server *server, uint32_t time) {
/* Move the grabbed view to the new position. */
struct tinywl_view *view = server->grabbed_view;
wlr_scene_node_set_position(&view->scene_tree->node,
/* Move the grabbed toplevel to the new position. */
struct tinywl_toplevel *toplevel = server->grabbed_toplevel;
wlr_scene_node_set_position(&toplevel->scene_tree->node,
server->cursor->x - server->grab_x,
server->cursor->y - server->grab_y);
}
static void process_cursor_resize(struct tinywl_server *server, uint32_t 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).
* Resizing the grabbed toplevel can be a little bit complicated, because we
* could be resizing from any corner or edge. This not only resizes the
* toplevel on one or two axes, but can also move the toplevel 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 tinywl_view *view = server->grabbed_view;
struct tinywl_toplevel *toplevel = server->grabbed_toplevel;
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;
@ -421,13 +421,13 @@ static void process_cursor_resize(struct tinywl_server *server, uint32_t time) {
}
struct wlr_box geo_box;
wlr_xdg_surface_get_geometry(view->xdg_toplevel->base, &geo_box);
wlr_scene_node_set_position(&view->scene_tree->node,
wlr_xdg_surface_get_geometry(toplevel->xdg_toplevel->base, &geo_box);
wlr_scene_node_set_position(&toplevel->scene_tree->node,
new_left - geo_box.x, new_top - geo_box.y);
int new_width = new_right - new_left;
int new_height = new_bottom - new_top;
wlr_xdg_toplevel_set_size(view->xdg_toplevel, new_width, new_height);
wlr_xdg_toplevel_set_size(toplevel->xdg_toplevel, new_width, new_height);
}
static void process_cursor_motion(struct tinywl_server *server, uint32_t time) {
@ -440,16 +440,16 @@ static void process_cursor_motion(struct tinywl_server *server, uint32_t time) {
return;
}
/* Otherwise, find the view under the pointer and send the event along. */
/* Otherwise, find the toplevel under the pointer and send the event along. */
double sx, sy;
struct wlr_seat *seat = server->seat;
struct wlr_surface *surface = NULL;
struct tinywl_view *view = desktop_view_at(server,
struct tinywl_toplevel *toplevel = desktop_toplevel_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
if (!toplevel) {
/* If there's no toplevel 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. */
* around the screen, not over any toplevels. */
wlr_cursor_set_xcursor(server->cursor, server->cursor_mgr, "default");
}
if (surface) {
@ -516,14 +516,14 @@ static void server_cursor_button(struct wl_listener *listener, void *data) {
event->time_msec, event->button, event->state);
double sx, sy;
struct wlr_surface *surface = NULL;
struct tinywl_view *view = desktop_view_at(server,
struct tinywl_toplevel *toplevel = desktop_toplevel_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. */
reset_cursor_mode(server);
} else {
/* Focus that client if the button was _pressed_ */
focus_view(view, surface);
focus_toplevel(toplevel, surface);
}
}
@ -652,73 +652,73 @@ static void server_new_output(struct wl_listener *listener, void *data) {
static void xdg_toplevel_map(struct wl_listener *listener, void *data) {
/* Called when the surface is mapped, or ready to display on-screen. */
struct tinywl_view *view = wl_container_of(listener, view, map);
struct tinywl_toplevel *toplevel = wl_container_of(listener, toplevel, map);
wl_list_insert(&view->server->views, &view->link);
wl_list_insert(&toplevel->server->toplevels, &toplevel->link);
focus_view(view, view->xdg_toplevel->base->surface);
focus_toplevel(toplevel, toplevel->xdg_toplevel->base->surface);
}
static void xdg_toplevel_unmap(struct wl_listener *listener, void *data) {
/* Called when the surface is unmapped, and should no longer be shown. */
struct tinywl_view *view = wl_container_of(listener, view, unmap);
struct tinywl_toplevel *toplevel = wl_container_of(listener, toplevel, unmap);
/* Reset the cursor mode if the grabbed view was unmapped. */
if (view == view->server->grabbed_view) {
reset_cursor_mode(view->server);
/* Reset the cursor mode if the grabbed toplevel was unmapped. */
if (toplevel == toplevel->server->grabbed_toplevel) {
reset_cursor_mode(toplevel->server);
}
wl_list_remove(&view->link);
wl_list_remove(&toplevel->link);
}
static void xdg_toplevel_destroy(struct wl_listener *listener, void *data) {
/* Called when the surface is destroyed and should never be shown again. */
struct tinywl_view *view = wl_container_of(listener, view, destroy);
struct tinywl_toplevel *toplevel = wl_container_of(listener, toplevel, 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);
wl_list_remove(&view->request_maximize.link);
wl_list_remove(&view->request_fullscreen.link);
wl_list_remove(&toplevel->map.link);
wl_list_remove(&toplevel->unmap.link);
wl_list_remove(&toplevel->destroy.link);
wl_list_remove(&toplevel->request_move.link);
wl_list_remove(&toplevel->request_resize.link);
wl_list_remove(&toplevel->request_maximize.link);
wl_list_remove(&toplevel->request_fullscreen.link);
free(view);
free(toplevel);
}
static void begin_interactive(struct tinywl_view *view,
static void begin_interactive(struct tinywl_toplevel *toplevel,
enum tinywl_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 tinywl_server *server = view->server;
struct tinywl_server *server = toplevel->server;
struct wlr_surface *focused_surface =
server->seat->pointer_state.focused_surface;
if (view->xdg_toplevel->base->surface !=
if (toplevel->xdg_toplevel->base->surface !=
wlr_surface_get_root_surface(focused_surface)) {
/* Deny move/resize requests from unfocused clients. */
return;
}
server->grabbed_view = view;
server->grabbed_toplevel = toplevel;
server->cursor_mode = mode;
if (mode == TINYWL_CURSOR_MOVE) {
server->grab_x = server->cursor->x - view->scene_tree->node.x;
server->grab_y = server->cursor->y - view->scene_tree->node.y;
server->grab_x = server->cursor->x - toplevel->scene_tree->node.x;
server->grab_y = server->cursor->y - toplevel->scene_tree->node.y;
} else {
struct wlr_box geo_box;
wlr_xdg_surface_get_geometry(view->xdg_toplevel->base, &geo_box);
wlr_xdg_surface_get_geometry(toplevel->xdg_toplevel->base, &geo_box);
double border_x = (view->scene_tree->node.x + geo_box.x) +
double border_x = (toplevel->scene_tree->node.x + geo_box.x) +
((edges & WLR_EDGE_RIGHT) ? geo_box.width : 0);
double border_y = (view->scene_tree->node.y + geo_box.y) +
double border_y = (toplevel->scene_tree->node.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->scene_tree->node.x;
server->grab_geobox.y += view->scene_tree->node.y;
server->grab_geobox.x += toplevel->scene_tree->node.x;
server->grab_geobox.y += toplevel->scene_tree->node.y;
server->resize_edges = edges;
}
@ -731,8 +731,8 @@ static void xdg_toplevel_request_move(
* 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 tinywl_view *view = wl_container_of(listener, view, request_move);
begin_interactive(view, TINYWL_CURSOR_MOVE, 0);
struct tinywl_toplevel *toplevel = wl_container_of(listener, toplevel, request_move);
begin_interactive(toplevel, TINYWL_CURSOR_MOVE, 0);
}
static void xdg_toplevel_request_resize(
@ -743,8 +743,8 @@ static void xdg_toplevel_request_resize(
* 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 tinywl_view *view = wl_container_of(listener, view, request_resize);
begin_interactive(view, TINYWL_CURSOR_RESIZE, event->edges);
struct tinywl_toplevel *toplevel = wl_container_of(listener, toplevel, request_resize);
begin_interactive(toplevel, TINYWL_CURSOR_RESIZE, event->edges);
}
static void xdg_toplevel_request_maximize(
@ -754,17 +754,17 @@ static void xdg_toplevel_request_maximize(
* client-side decorations. tinywl doesn't support maximization, but
* to conform to xdg-shell protocol we still must send a configure.
* wlr_xdg_surface_schedule_configure() is used to send an empty reply. */
struct tinywl_view *view =
wl_container_of(listener, view, request_maximize);
wlr_xdg_surface_schedule_configure(view->xdg_toplevel->base);
struct tinywl_toplevel *toplevel =
wl_container_of(listener, toplevel, request_maximize);
wlr_xdg_surface_schedule_configure(toplevel->xdg_toplevel->base);
}
static void xdg_toplevel_request_fullscreen(
struct wl_listener *listener, void *data) {
/* Just as with request_maximize, we must send a configure here. */
struct tinywl_view *view =
wl_container_of(listener, view, request_fullscreen);
wlr_xdg_surface_schedule_configure(view->xdg_toplevel->base);
struct tinywl_toplevel *toplevel =
wl_container_of(listener, toplevel, request_fullscreen);
wlr_xdg_surface_schedule_configure(toplevel->xdg_toplevel->base);
}
static void server_new_xdg_surface(struct wl_listener *listener, void *data) {
@ -790,35 +790,35 @@ static void server_new_xdg_surface(struct wl_listener *listener, void *data) {
}
assert(xdg_surface->role == WLR_XDG_SURFACE_ROLE_TOPLEVEL);
/* Allocate a tinywl_view for this surface */
struct tinywl_view *view = calloc(1, sizeof(*view));
view->server = server;
view->xdg_toplevel = xdg_surface->toplevel;
view->scene_tree = wlr_scene_xdg_surface_create(
&view->server->scene->tree, view->xdg_toplevel->base);
view->scene_tree->node.data = view;
xdg_surface->data = view->scene_tree;
/* Allocate a tinywl_toplevel for this surface */
struct tinywl_toplevel *toplevel = calloc(1, sizeof(*toplevel));
toplevel->server = server;
toplevel->xdg_toplevel = xdg_surface->toplevel;
toplevel->scene_tree = wlr_scene_xdg_surface_create(
&toplevel->server->scene->tree, toplevel->xdg_toplevel->base);
toplevel->scene_tree->node.data = toplevel;
xdg_surface->data = toplevel->scene_tree;
/* Listen to the various events it can emit */
view->map.notify = xdg_toplevel_map;
wl_signal_add(&xdg_surface->surface->events.map, &view->map);
view->unmap.notify = xdg_toplevel_unmap;
wl_signal_add(&xdg_surface->surface->events.unmap, &view->unmap);
view->destroy.notify = xdg_toplevel_destroy;
wl_signal_add(&xdg_surface->events.destroy, &view->destroy);
toplevel->map.notify = xdg_toplevel_map;
wl_signal_add(&xdg_surface->surface->events.map, &toplevel->map);
toplevel->unmap.notify = xdg_toplevel_unmap;
wl_signal_add(&xdg_surface->surface->events.unmap, &toplevel->unmap);
toplevel->destroy.notify = xdg_toplevel_destroy;
wl_signal_add(&xdg_surface->events.destroy, &toplevel->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);
view->request_maximize.notify = xdg_toplevel_request_maximize;
wl_signal_add(&toplevel->events.request_maximize,
&view->request_maximize);
view->request_fullscreen.notify = xdg_toplevel_request_fullscreen;
wl_signal_add(&toplevel->events.request_fullscreen,
&view->request_fullscreen);
struct wlr_xdg_toplevel *xdg_toplevel = xdg_surface->toplevel;
toplevel->request_move.notify = xdg_toplevel_request_move;
wl_signal_add(&xdg_toplevel->events.request_move, &toplevel->request_move);
toplevel->request_resize.notify = xdg_toplevel_request_resize;
wl_signal_add(&xdg_toplevel->events.request_resize, &toplevel->request_resize);
toplevel->request_maximize.notify = xdg_toplevel_request_maximize;
wl_signal_add(&xdg_toplevel->events.request_maximize,
&toplevel->request_maximize);
toplevel->request_fullscreen.notify = xdg_toplevel_request_fullscreen;
wl_signal_add(&xdg_toplevel->events.request_fullscreen,
&toplevel->request_fullscreen);
}
int main(int argc, char *argv[]) {
@ -914,7 +914,7 @@ int main(int argc, char *argv[]) {
*
* https://drewdevault.com/2018/07/29/Wayland-shells.html
*/
wl_list_init(&server.views);
wl_list_init(&server.toplevels);
server.xdg_shell = wlr_xdg_shell_create(server.wl_display, 3);
server.new_xdg_surface.notify = server_new_xdg_surface;
wl_signal_add(&server.xdg_shell->events.new_surface,