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wlr_xdg_popup.c
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wlr_xdg_popup.c
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#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "types/wlr_xdg_shell.h"
#include "util/signal.h"
static void xdg_pointer_grab_end(struct wlr_seat_pointer_grab *grab) {
struct wlr_xdg_popup_grab *popup_grab = grab->data;
struct wlr_xdg_popup *popup, *tmp;
wl_list_for_each_safe(popup, tmp, &popup_grab->popups, grab_link) {
xdg_popup_send_popup_done(popup->resource);
}
wlr_seat_pointer_end_grab(grab->seat);
wlr_seat_keyboard_end_grab(grab->seat);
}
static void xdg_pointer_grab_enter(struct wlr_seat_pointer_grab *grab,
struct wlr_surface *surface, double sx, double sy) {
struct wlr_xdg_popup_grab *popup_grab = grab->data;
if (wl_resource_get_client(surface->resource) == popup_grab->client) {
wlr_seat_pointer_enter(grab->seat, surface, sx, sy);
} else {
wlr_seat_pointer_clear_focus(grab->seat);
}
}
static void xdg_pointer_grab_motion(struct wlr_seat_pointer_grab *grab,
uint32_t time, double sx, double sy) {
wlr_seat_pointer_send_motion(grab->seat, time, sx, sy);
}
static uint32_t xdg_pointer_grab_button(struct wlr_seat_pointer_grab *grab,
uint32_t time, uint32_t button, uint32_t state) {
uint32_t serial =
wlr_seat_pointer_send_button(grab->seat, time, button, state);
if (serial) {
return serial;
} else {
xdg_pointer_grab_end(grab);
return 0;
}
}
static void xdg_pointer_grab_axis(struct wlr_seat_pointer_grab *grab,
uint32_t time, enum wlr_axis_orientation orientation, double value,
int32_t value_discrete, enum wlr_axis_source source) {
wlr_seat_pointer_send_axis(grab->seat, time, orientation, value,
value_discrete, source);
}
static void xdg_pointer_grab_cancel(struct wlr_seat_pointer_grab *grab) {
xdg_pointer_grab_end(grab);
}
static const struct wlr_pointer_grab_interface xdg_pointer_grab_impl = {
.enter = xdg_pointer_grab_enter,
.motion = xdg_pointer_grab_motion,
.button = xdg_pointer_grab_button,
.cancel = xdg_pointer_grab_cancel,
.axis = xdg_pointer_grab_axis,
};
static void xdg_keyboard_grab_enter(struct wlr_seat_keyboard_grab *grab,
struct wlr_surface *surface, uint32_t keycodes[], size_t num_keycodes,
struct wlr_keyboard_modifiers *modifiers) {
// keyboard focus should remain on the popup
}
static void xdg_keyboard_grab_key(struct wlr_seat_keyboard_grab *grab, uint32_t time,
uint32_t key, uint32_t state) {
wlr_seat_keyboard_send_key(grab->seat, time, key, state);
}
static void xdg_keyboard_grab_modifiers(struct wlr_seat_keyboard_grab *grab,
struct wlr_keyboard_modifiers *modifiers) {
wlr_seat_keyboard_send_modifiers(grab->seat, modifiers);
}
static void xdg_keyboard_grab_cancel(struct wlr_seat_keyboard_grab *grab) {
wlr_seat_pointer_end_grab(grab->seat);
}
static const struct wlr_keyboard_grab_interface xdg_keyboard_grab_impl = {
.enter = xdg_keyboard_grab_enter,
.key = xdg_keyboard_grab_key,
.modifiers = xdg_keyboard_grab_modifiers,
.cancel = xdg_keyboard_grab_cancel,
};
static void xdg_popup_grab_handle_seat_destroy(
struct wl_listener *listener, void *data) {
struct wlr_xdg_popup_grab *xdg_grab =
wl_container_of(listener, xdg_grab, seat_destroy);
wl_list_remove(&xdg_grab->seat_destroy.link);
struct wlr_xdg_popup *popup, *next;
wl_list_for_each_safe(popup, next, &xdg_grab->popups, grab_link) {
destroy_xdg_surface(popup->base);
}
wl_list_remove(&xdg_grab->link);
free(xdg_grab);
}
struct wlr_xdg_popup_grab *get_xdg_shell_popup_grab_from_seat(
struct wlr_xdg_shell *shell, struct wlr_seat *seat) {
struct wlr_xdg_popup_grab *xdg_grab;
wl_list_for_each(xdg_grab, &shell->popup_grabs, link) {
if (xdg_grab->seat == seat) {
return xdg_grab;
}
}
xdg_grab = calloc(1, sizeof(struct wlr_xdg_popup_grab));
if (!xdg_grab) {
return NULL;
}
xdg_grab->pointer_grab.data = xdg_grab;
xdg_grab->pointer_grab.interface = &xdg_pointer_grab_impl;
xdg_grab->keyboard_grab.data = xdg_grab;
xdg_grab->keyboard_grab.interface = &xdg_keyboard_grab_impl;
wl_list_init(&xdg_grab->popups);
wl_list_insert(&shell->popup_grabs, &xdg_grab->link);
xdg_grab->seat = seat;
xdg_grab->seat_destroy.notify = xdg_popup_grab_handle_seat_destroy;
wl_signal_add(&seat->events.destroy, &xdg_grab->seat_destroy);
return xdg_grab;
}
static const struct xdg_popup_interface xdg_popup_implementation;
struct wlr_xdg_surface *wlr_xdg_surface_from_popup_resource(
struct wl_resource *resource) {
assert(wl_resource_instance_of(resource, &xdg_popup_interface,
&xdg_popup_implementation));
return wl_resource_get_user_data(resource);
}
static void xdg_popup_handle_grab(struct wl_client *client,
struct wl_resource *resource, struct wl_resource *seat_resource,
uint32_t serial) {
struct wlr_xdg_surface *surface =
wlr_xdg_surface_from_popup_resource(resource);
struct wlr_seat_client *seat_client =
wlr_seat_client_from_resource(seat_resource);
if (!surface) {
return;
}
if (surface->popup->committed) {
wl_resource_post_error(surface->popup->resource,
XDG_POPUP_ERROR_INVALID_GRAB,
"xdg_popup is already mapped");
return;
}
struct wlr_xdg_popup_grab *popup_grab = get_xdg_shell_popup_grab_from_seat(
surface->client->shell, seat_client->seat);
if (!wl_list_empty(&surface->popups)) {
wl_resource_post_error(surface->client->resource,
XDG_WM_BASE_ERROR_NOT_THE_TOPMOST_POPUP,
"xdg_popup was not created on the topmost popup");
return;
}
popup_grab->client = surface->client->client;
surface->popup->seat = seat_client->seat;
wl_list_insert(&popup_grab->popups, &surface->popup->grab_link);
wlr_seat_pointer_start_grab(seat_client->seat,
&popup_grab->pointer_grab);
wlr_seat_keyboard_start_grab(seat_client->seat,
&popup_grab->keyboard_grab);
}
static void xdg_popup_handle_destroy(struct wl_client *client,
struct wl_resource *resource) {
struct wlr_xdg_surface *surface =
wlr_xdg_surface_from_popup_resource(resource);
if (surface && !wl_list_empty(&surface->popups)) {
wl_resource_post_error(surface->client->resource,
XDG_WM_BASE_ERROR_NOT_THE_TOPMOST_POPUP,
"xdg_popup was destroyed while it was not the topmost popup");
return;
}
wl_resource_destroy(resource);
}
static const struct xdg_popup_interface xdg_popup_implementation = {
.destroy = xdg_popup_handle_destroy,
.grab = xdg_popup_handle_grab,
};
static void xdg_popup_handle_resource_destroy(struct wl_resource *resource) {
struct wlr_xdg_surface *surface =
wlr_xdg_surface_from_popup_resource(resource);
destroy_xdg_popup(surface);
}
const struct wlr_surface_role xdg_popup_surface_role = {
.name = "xdg_popup",
.commit = handle_xdg_surface_commit,
.precommit = handle_xdg_surface_precommit,
};
void create_xdg_popup(struct wlr_xdg_surface *xdg_surface,
struct wlr_xdg_surface *parent,
struct wlr_xdg_positioner_resource *positioner, int32_t id) {
if (positioner->attrs.size.width == 0 ||
positioner->attrs.anchor_rect.width == 0) {
wl_resource_post_error(xdg_surface->resource,
XDG_WM_BASE_ERROR_INVALID_POSITIONER,
"positioner object is not complete");
return;
}
if (!wlr_surface_set_role(xdg_surface->surface, &xdg_popup_surface_role,
xdg_surface, xdg_surface->resource, XDG_WM_BASE_ERROR_ROLE)) {
return;
}
if (xdg_surface->role != WLR_XDG_SURFACE_ROLE_NONE) {
wl_resource_post_error(xdg_surface->resource,
XDG_SURFACE_ERROR_ALREADY_CONSTRUCTED,
"xdg-surface has already been constructed");
return;
}
assert(xdg_surface->popup == NULL);
xdg_surface->popup = calloc(1, sizeof(struct wlr_xdg_popup));
if (!xdg_surface->popup) {
wl_resource_post_no_memory(xdg_surface->resource);
return;
}
xdg_surface->popup->base = xdg_surface;
xdg_surface->popup->resource = wl_resource_create(
xdg_surface->client->client, &xdg_popup_interface,
wl_resource_get_version(xdg_surface->resource), id);
if (xdg_surface->popup->resource == NULL) {
free(xdg_surface->popup);
wl_resource_post_no_memory(xdg_surface->resource);
return;
}
wl_resource_set_implementation(xdg_surface->popup->resource,
&xdg_popup_implementation, xdg_surface,
xdg_popup_handle_resource_destroy);
xdg_surface->role = WLR_XDG_SURFACE_ROLE_POPUP;
// positioner properties
memcpy(&xdg_surface->popup->positioner, &positioner->attrs,
sizeof(struct wlr_xdg_positioner));
xdg_surface->popup->geometry =
wlr_xdg_positioner_get_geometry(&positioner->attrs);
if (parent) {
xdg_surface->popup->parent = parent->surface;
wl_list_insert(&parent->popups, &xdg_surface->popup->link);
wlr_signal_emit_safe(&parent->events.new_popup, xdg_surface->popup);
} else {
wl_list_init(&xdg_surface->popup->link);
}
}
void destroy_xdg_popup(struct wlr_xdg_surface *xdg_surface) {
if (xdg_surface == NULL) {
return;
}
assert(xdg_surface->role == WLR_XDG_SURFACE_ROLE_POPUP);
reset_xdg_surface(xdg_surface);
}
void wlr_xdg_popup_get_anchor_point(struct wlr_xdg_popup *popup,
int *root_sx, int *root_sy) {
struct wlr_box rect = popup->positioner.anchor_rect;
enum xdg_positioner_anchor anchor = popup->positioner.anchor;
int sx = 0, sy = 0;
if (anchor == XDG_POSITIONER_ANCHOR_NONE) {
sx = (rect.x + rect.width) / 2;
sy = (rect.y + rect.height) / 2;
} else if (anchor == XDG_POSITIONER_ANCHOR_TOP) {
sx = (rect.x + rect.width) / 2;
sy = rect.y;
} else if (anchor == XDG_POSITIONER_ANCHOR_BOTTOM) {
sx = (rect.x + rect.width) / 2;
sy = rect.y + rect.height;
} else if (anchor == XDG_POSITIONER_ANCHOR_LEFT) {
sx = rect.x;
sy = (rect.y + rect.height) / 2;
} else if (anchor == XDG_POSITIONER_ANCHOR_RIGHT) {
sx = rect.x + rect.width;
sy = (rect.y + rect.height) / 2;
} else if (anchor == XDG_POSITIONER_ANCHOR_TOP_LEFT) {
sx = rect.x;
sy = rect.y;
} else if (anchor == XDG_POSITIONER_ANCHOR_TOP_RIGHT) {
sx = rect.x + rect.width;
sy = rect.y;
} else if (anchor == XDG_POSITIONER_ANCHOR_BOTTOM_LEFT) {
sx = rect.x;
sy = rect.y + rect.height;
} else if (anchor == XDG_POSITIONER_ANCHOR_BOTTOM_RIGHT) {
sx = rect.x + rect.width;
sy = rect.y + rect.height;
}
*root_sx = sx;
*root_sy = sy;
}
void wlr_xdg_popup_get_toplevel_coords(struct wlr_xdg_popup *popup,
int popup_sx, int popup_sy, int *toplevel_sx, int *toplevel_sy) {
struct wlr_surface *parent = popup->parent;
while (wlr_surface_is_xdg_surface(parent)) {
struct wlr_xdg_surface *xdg_surface =
wlr_xdg_surface_from_wlr_surface(parent);
if (xdg_surface->role == WLR_XDG_SURFACE_ROLE_POPUP) {
popup_sx += xdg_surface->popup->geometry.x;
popup_sy += xdg_surface->popup->geometry.y;
parent = xdg_surface->popup->parent;
} else {
popup_sx += xdg_surface->geometry.x;
popup_sy += xdg_surface->geometry.y;
break;
}
}
assert(parent);
*toplevel_sx = popup_sx;
*toplevel_sy = popup_sy;
}
static void xdg_popup_box_constraints(struct wlr_xdg_popup *popup,
struct wlr_box *toplevel_sx_box, int *offset_x, int *offset_y) {
int popup_width = popup->geometry.width;
int popup_height = popup->geometry.height;
int anchor_sx = 0, anchor_sy = 0;
wlr_xdg_popup_get_anchor_point(popup, &anchor_sx, &anchor_sy);
int popup_sx = 0, popup_sy = 0;
wlr_xdg_popup_get_toplevel_coords(popup, popup->geometry.x,
popup->geometry.y, &popup_sx, &popup_sy);
*offset_x = 0, *offset_y = 0;
if (popup_sx < toplevel_sx_box->x) {
*offset_x = toplevel_sx_box->x - popup_sx;
} else if (popup_sx + popup_width >
toplevel_sx_box->x + toplevel_sx_box->width) {
*offset_x = toplevel_sx_box->x + toplevel_sx_box->width -
(popup_sx + popup_width);
}
if (popup_sy < toplevel_sx_box->y) {
*offset_y = toplevel_sx_box->y - popup_sy;
} else if (popup_sy + popup_height >
toplevel_sx_box->y + toplevel_sx_box->height) {
*offset_y = toplevel_sx_box->y + toplevel_sx_box->height -
(popup_sy + popup_height);
}
}
static bool xdg_popup_unconstrain_flip(struct wlr_xdg_popup *popup,
struct wlr_box *toplevel_sx_box) {
int offset_x = 0, offset_y = 0;
xdg_popup_box_constraints(popup, toplevel_sx_box,
&offset_x, &offset_y);
if (!offset_x && !offset_y) {
return true;
}
bool flip_x = offset_x &&
(popup->positioner.constraint_adjustment &
XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_FLIP_X);
bool flip_y = offset_y &&
(popup->positioner.constraint_adjustment &
XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_FLIP_Y);
if (flip_x) {
wlr_positioner_invert_x(&popup->positioner);
}
if (flip_y) {
wlr_positioner_invert_y(&popup->positioner);
}
popup->geometry =
wlr_xdg_positioner_get_geometry(&popup->positioner);
xdg_popup_box_constraints(popup, toplevel_sx_box,
&offset_x, &offset_y);
if (!offset_x && !offset_y) {
// no longer constrained
return true;
}
// revert the positioner back if it didn't fix it and go to the next part
if (flip_x) {
wlr_positioner_invert_x(&popup->positioner);
}
if (flip_y) {
wlr_positioner_invert_y(&popup->positioner);
}
popup->geometry =
wlr_xdg_positioner_get_geometry(&popup->positioner);
return false;
}
static bool xdg_popup_unconstrain_slide(struct wlr_xdg_popup *popup,
struct wlr_box *toplevel_sx_box) {
int offset_x = 0, offset_y = 0;
xdg_popup_box_constraints(popup, toplevel_sx_box,
&offset_x, &offset_y);
if (!offset_x && !offset_y) {
return true;
}
bool slide_x = offset_x &&
(popup->positioner.constraint_adjustment &
XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_SLIDE_X);
bool slide_y = offset_y &&
(popup->positioner.constraint_adjustment &
XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_SLIDE_Y);
if (slide_x) {
popup->geometry.x += offset_x;
}
if (slide_y) {
popup->geometry.y += offset_y;
}
int toplevel_x = 0, toplevel_y = 0;
wlr_xdg_popup_get_toplevel_coords(popup, popup->geometry.x,
popup->geometry.y, &toplevel_x, &toplevel_y);
if (slide_x && toplevel_x < toplevel_sx_box->x) {
popup->geometry.x += toplevel_sx_box->x - toplevel_x;
}
if (slide_y && toplevel_y < toplevel_sx_box->y) {
popup->geometry.y += toplevel_sx_box->y - toplevel_y;
}
xdg_popup_box_constraints(popup, toplevel_sx_box,
&offset_x, &offset_y);
return !offset_x && !offset_y;
}
static bool xdg_popup_unconstrain_resize(struct wlr_xdg_popup *popup,
struct wlr_box *toplevel_sx_box) {
int offset_x, offset_y;
xdg_popup_box_constraints(popup, toplevel_sx_box,
&offset_x, &offset_y);
if (!offset_x && !offset_y) {
return true;
}
bool resize_x = offset_x &&
(popup->positioner.constraint_adjustment &
XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_RESIZE_X);
bool resize_y = offset_y &&
(popup->positioner.constraint_adjustment &
XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_RESIZE_Y);
if (resize_x) {
popup->geometry.width -= offset_x;
}
if (resize_y) {
popup->geometry.height -= offset_y;
}
xdg_popup_box_constraints(popup, toplevel_sx_box,
&offset_x, &offset_y);
return !offset_x && !offset_y;
}
void wlr_xdg_popup_unconstrain_from_box(struct wlr_xdg_popup *popup,
struct wlr_box *toplevel_sx_box) {
if (xdg_popup_unconstrain_flip(popup, toplevel_sx_box)) {
return;
}
if (xdg_popup_unconstrain_slide(popup, toplevel_sx_box)) {
return;
}
if (xdg_popup_unconstrain_resize(popup, toplevel_sx_box)) {
return;
}
}