xdg-shell stable: copy-pasta implementation

1 files changed, 363 insertions, 0 deletions

diff --git a/rootston/xdg_shell.c b/rootston/xdg_shell.c
new file mode 100644
index 00000000..8340de46
--- /dev/null
+++ b/rootston/xdg_shell.c
@@ -0,0 +1,363 @@
+#include <assert.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <wayland-server.h>
+#include <wlr/types/wlr_box.h>
+#include <wlr/types/wlr_surface.h>
+#include <wlr/types/wlr_xdg_shell.h>
+#include <wlr/util/log.h>
+#include "rootston/desktop.h"
+#include "rootston/input.h"
+#include "rootston/server.h"
+
+static void popup_destroy(struct roots_view_child *child) {
+	assert(child->destroy == popup_destroy);
+	struct roots_xdg_popup *popup = (struct roots_xdg_popup *)child;
+	if (popup == NULL) {
+		return;
+	}
+	wl_list_remove(&popup->destroy.link);
+	wl_list_remove(&popup->new_popup.link);
+	view_child_finish(&popup->view_child);
+	free(popup);
+}
+
+static void popup_handle_destroy(struct wl_listener *listener, void *data) {
+	struct roots_xdg_popup *popup =
+		wl_container_of(listener, popup, destroy);
+	popup_destroy((struct roots_view_child *)popup);
+}
+
+static struct roots_xdg_popup *popup_create(struct roots_view *view,
+	struct wlr_xdg_popup *wlr_popup);
+
+static void popup_handle_new_popup(struct wl_listener *listener, void *data) {
+	struct roots_xdg_popup *popup =
+		wl_container_of(listener, popup, new_popup);
+	struct wlr_xdg_popup *wlr_popup = data;
+	popup_create(popup->view_child.view, wlr_popup);
+}
+
+static struct roots_xdg_popup *popup_create(struct roots_view *view,
+		struct wlr_xdg_popup *wlr_popup) {
+	struct roots_xdg_popup *popup =
+		calloc(1, sizeof(struct roots_xdg_popup));
+	if (popup == NULL) {
+		return NULL;
+	}
+	popup->wlr_popup = wlr_popup;
+	popup->view_child.destroy = popup_destroy;
+	view_child_init(&popup->view_child, view, wlr_popup->base->surface);
+	popup->destroy.notify = popup_handle_destroy;
+	wl_signal_add(&wlr_popup->base->events.destroy, &popup->destroy);
+	popup->new_popup.notify = popup_handle_new_popup;
+	wl_signal_add(&wlr_popup->base->events.new_popup, &popup->new_popup);
+	return popup;
+}
+
+
+static void get_size(const struct roots_view *view, struct wlr_box *box) {
+	assert(view->type == ROOTS_XDG_SHELL_VIEW);
+	struct wlr_xdg_surface *surface = view->xdg_surface;
+
+	if (surface->geometry->width > 0 && surface->geometry->height > 0) {
+		box->width = surface->geometry->width;
+		box->height = surface->geometry->height;
+	} else {
+		box->width = view->wlr_surface->current->width;
+		box->height = view->wlr_surface->current->height;
+	}
+}
+
+static void activate(struct roots_view *view, bool active) {
+	assert(view->type == ROOTS_XDG_SHELL_VIEW);
+	struct wlr_xdg_surface *surface = view->xdg_surface;
+	if (surface->role == WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
+		wlr_xdg_toplevel_set_activated(surface, active);
+	}
+}
+
+static void apply_size_constraints(struct wlr_xdg_surface *surface,
+		uint32_t width, uint32_t height, uint32_t *dest_width,
+		uint32_t *dest_height) {
+	*dest_width = width;
+	*dest_height = height;
+
+	struct wlr_xdg_toplevel_state *state = &surface->toplevel_state->current;
+	if (width < state->min_width) {
+		*dest_width = state->min_width;
+	} else if (state->max_width > 0 &&
+			width > state->max_width) {
+		*dest_width = state->max_width;
+	}
+	if (height < state->min_height) {
+		*dest_height = state->min_height;
+	} else if (state->max_height > 0 &&
+			height > state->max_height) {
+		*dest_height = state->max_height;
+	}
+}
+
+static void resize(struct roots_view *view, uint32_t width, uint32_t height) {
+	assert(view->type == ROOTS_XDG_SHELL_VIEW);
+	struct wlr_xdg_surface *surface = view->xdg_surface;
+	if (surface->role != WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
+		return;
+	}
+
+	uint32_t constrained_width, constrained_height;
+	apply_size_constraints(surface, width, height, &constrained_width,
+		&constrained_height);
+
+	wlr_xdg_toplevel_set_size(surface, constrained_width,
+		constrained_height);
+}
+
+static void move_resize(struct roots_view *view, double x, double y,
+		uint32_t width, uint32_t height) {
+	assert(view->type == ROOTS_XDG_SHELL_VIEW);
+	struct roots_xdg_surface *roots_surface = view->roots_xdg_surface;
+	struct wlr_xdg_surface *surface = view->xdg_surface;
+	if (surface->role != WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
+		return;
+	}
+
+	bool update_x = x != view->x;
+	bool update_y = y != view->y;
+
+	uint32_t constrained_width, constrained_height;
+	apply_size_constraints(surface, width, height, &constrained_width,
+		&constrained_height);
+
+	if (update_x) {
+		x = x + width - constrained_width;
+	}
+	if (update_y) {
+		y = y + height - constrained_height;
+	}
+
+	view->pending_move_resize.update_x = update_x;
+	view->pending_move_resize.update_y = update_y;
+	view->pending_move_resize.x = x;
+	view->pending_move_resize.y = y;
+	view->pending_move_resize.width = constrained_width;
+	view->pending_move_resize.height = constrained_height;
+
+	uint32_t serial = wlr_xdg_toplevel_set_size(surface, constrained_width,
+		constrained_height);
+	if (serial > 0) {
+		roots_surface->pending_move_resize_configure_serial = serial;
+	} else if (roots_surface->pending_move_resize_configure_serial == 0) {
+		view_update_position(view, x, y);
+	}
+}
+
+static void maximize(struct roots_view *view, bool maximized) {
+	assert(view->type == ROOTS_XDG_SHELL_VIEW);
+	struct wlr_xdg_surface *surface = view->xdg_surface;
+	if (surface->role != WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
+		return;
+	}
+
+	wlr_xdg_toplevel_set_maximized(surface, maximized);
+}
+
+static void set_fullscreen(struct roots_view *view, bool fullscreen) {
+	assert(view->type == ROOTS_XDG_SHELL_VIEW);
+	struct wlr_xdg_surface *surface = view->xdg_surface;
+	if (surface->role != WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
+		return;
+	}
+
+	wlr_xdg_toplevel_set_fullscreen(surface, fullscreen);
+}
+
+static void close(struct roots_view *view) {
+	assert(view->type == ROOTS_XDG_SHELL_VIEW);
+	struct wlr_xdg_surface *surface = view->xdg_surface;
+	if (surface->role == WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
+		wlr_xdg_toplevel_send_close(surface);
+	}
+}
+
+static void handle_request_move(struct wl_listener *listener, void *data) {
+	struct roots_xdg_surface *roots_xdg_surface =
+		wl_container_of(listener, roots_xdg_surface, request_move);
+	struct roots_view *view = roots_xdg_surface->view;
+	struct roots_input *input = view->desktop->server->input;
+	struct wlr_xdg_toplevel_move_event *e = data;
+	struct roots_seat *seat = input_seat_from_wlr_seat(input, e->seat->seat);
+	// TODO verify event serial
+	if (!seat || seat->cursor->mode != ROOTS_CURSOR_PASSTHROUGH) {
+		return;
+	}
+	roots_seat_begin_move(seat, view);
+}
+
+static void handle_request_resize(struct wl_listener *listener, void *data) {
+	struct roots_xdg_surface *roots_xdg_surface =
+		wl_container_of(listener, roots_xdg_surface, request_resize);
+	struct roots_view *view = roots_xdg_surface->view;
+	struct roots_input *input = view->desktop->server->input;
+	struct wlr_xdg_toplevel_resize_event *e = data;
+	// TODO verify event serial
+	struct roots_seat *seat = input_seat_from_wlr_seat(input, e->seat->seat);
+	assert(seat);
+	if (!seat || seat->cursor->mode != ROOTS_CURSOR_PASSTHROUGH) {
+		return;
+	}
+	roots_seat_begin_resize(seat, view, e->edges);
+}
+
+static void handle_request_maximize(struct wl_listener *listener, void *data) {
+	struct roots_xdg_surface *roots_xdg_surface =
+		wl_container_of(listener, roots_xdg_surface, request_maximize);
+	struct roots_view *view = roots_xdg_surface->view;
+	struct wlr_xdg_surface *surface = view->xdg_surface;
+
+	if (surface->role != WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
+		return;
+	}
+
+	view_maximize(view, surface->toplevel_state->next.maximized);
+}
+
+static void handle_request_fullscreen(struct wl_listener *listener,
+		void *data) {
+	struct roots_xdg_surface *roots_xdg_surface =
+		wl_container_of(listener, roots_xdg_surface, request_fullscreen);
+	struct roots_view *view = roots_xdg_surface->view;
+	struct wlr_xdg_surface *surface = view->xdg_surface;
+	struct wlr_xdg_toplevel_set_fullscreen_event *e = data;
+
+	if (surface->role != WLR_XDG_SURFACE_ROLE_TOPLEVEL) {
+		return;
+	}
+
+	view_set_fullscreen(view, e->fullscreen, e->output);
+}
+
+static void handle_surface_commit(struct wl_listener *listener, void *data) {
+	struct roots_xdg_surface *roots_surface =
+		wl_container_of(listener, roots_surface, surface_commit);
+	struct roots_view *view = roots_surface->view;
+	struct wlr_xdg_surface *surface = view->xdg_surface;
+
+	view_apply_damage(view);
+
+	struct wlr_box size;
+	get_size(view, &size);
+	view_update_size(view, size.width, size.height);
+
+	uint32_t pending_serial =
+		roots_surface->pending_move_resize_configure_serial;
+	if (pending_serial > 0 && pending_serial >= surface->configure_serial) {
+		double x = view->x;
+		double y = view->y;
+		if (view->pending_move_resize.update_x) {
+			x = view->pending_move_resize.x + view->pending_move_resize.width -
+				size.width;
+		}
+		if (view->pending_move_resize.update_y) {
+			y = view->pending_move_resize.y + view->pending_move_resize.height -
+				size.height;
+		}
+		view_update_position(view, x, y);
+
+		if (pending_serial == surface->configure_serial) {
+			roots_surface->pending_move_resize_configure_serial = 0;
+		}
+	}
+}
+
+static void handle_new_popup(struct wl_listener *listener, void *data) {
+	struct roots_xdg_surface *roots_xdg_surface =
+		wl_container_of(listener, roots_xdg_surface, new_popup);
+	struct wlr_xdg_popup *wlr_popup = data;
+	popup_create(roots_xdg_surface->view, wlr_popup);
+}
+
+static void handle_destroy(struct wl_listener *listener, void *data) {
+	struct roots_xdg_surface *roots_xdg_surface =
+		wl_container_of(listener, roots_xdg_surface, destroy);
+	wl_list_remove(&roots_xdg_surface->surface_commit.link);
+	wl_list_remove(&roots_xdg_surface->destroy.link);
+	wl_list_remove(&roots_xdg_surface->new_popup.link);
+	wl_list_remove(&roots_xdg_surface->request_move.link);
+	wl_list_remove(&roots_xdg_surface->request_resize.link);
+	wl_list_remove(&roots_xdg_surface->request_maximize.link);
+	wl_list_remove(&roots_xdg_surface->request_fullscreen.link);
+	wl_list_remove(&roots_xdg_surface->view->link);
+	view_finish(roots_xdg_surface->view);
+	free(roots_xdg_surface->view);
+	free(roots_xdg_surface);
+}
+
+void handle_xdg_shell_surface(struct wl_listener *listener, void *data) {
+	struct wlr_xdg_surface *surface = data;
+	assert(surface->role != WLR_XDG_SURFACE_ROLE_NONE);
+
+	if (surface->role == WLR_XDG_SURFACE_ROLE_POPUP) {
+		wlr_log(L_DEBUG, "new xdg popup");
+		return;
+	}
+
+	struct roots_desktop *desktop =
+		wl_container_of(listener, desktop, xdg_shell_surface);
+
+	wlr_log(L_DEBUG, "new xdg toplevel: title=%s, app_id=%s",
+		surface->title, surface->app_id);
+	wlr_xdg_surface_ping(surface);
+
+	struct roots_xdg_surface *roots_surface =
+		calloc(1, sizeof(struct roots_xdg_surface));
+	if (!roots_surface) {
+		return;
+	}
+	roots_surface->surface_commit.notify = handle_surface_commit;
+	wl_signal_add(&surface->surface->events.commit,
+		&roots_surface->surface_commit);
+	roots_surface->destroy.notify = handle_destroy;
+	wl_signal_add(&surface->events.destroy, &roots_surface->destroy);
+	roots_surface->request_move.notify = handle_request_move;
+	wl_signal_add(&surface->events.request_move, &roots_surface->request_move);
+	roots_surface->request_resize.notify = handle_request_resize;
+	wl_signal_add(&surface->events.request_resize,
+		&roots_surface->request_resize);
+	roots_surface->request_maximize.notify = handle_request_maximize;
+	wl_signal_add(&surface->events.request_maximize,
+		&roots_surface->request_maximize);
+	roots_surface->request_fullscreen.notify = handle_request_fullscreen;
+	wl_signal_add(&surface->events.request_fullscreen,
+		&roots_surface->request_fullscreen);
+	roots_surface->new_popup.notify = handle_new_popup;
+	wl_signal_add(&surface->events.new_popup, &roots_surface->new_popup);
+
+	struct roots_view *view = calloc(1, sizeof(struct roots_view));
+	if (!view) {
+		free(roots_surface);
+		return;
+	}
+	view->type = ROOTS_XDG_SHELL_VIEW;
+
+	view->xdg_surface = surface;
+	view->roots_xdg_surface = roots_surface;
+	view->wlr_surface = surface->surface;
+	view->activate = activate;
+	view->resize = resize;
+	view->move_resize = move_resize;
+	view->maximize = maximize;
+	view->set_fullscreen = set_fullscreen;
+	view->close = close;
+	roots_surface->view = view;
+
+	struct wlr_box box;
+	get_size(view, &box);
+	view->width = box.width;
+	view->height = box.height;
+
+	view_init(view, desktop);
+	wl_list_insert(&desktop->views, &view->link);
+
+	view_setup(view);
+}