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xwayland: add wlr_xwayland_set_workareas()

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This function allows compositors to set the _NET_WORKAREA property on
the root window. XWayland clients use _NET_WORKAREA to determine how
much of the screen is not covered by panels/docks. The property is used
for example by Qt to determine areas of the screen that popup menus
should not overlap (see QScreen::availableVirtualGeometry).
This commit is contained in:
John Lindgren 2023-10-24 10:33:50 -04:00
parent 2410710a0f
commit af165acb42
3 changed files with 34 additions and 0 deletions
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11
include/wlr/xwayland/xwayland.h
View file

@ -16,6 +16,7 @@
#include <xcb/xcb_icccm.h>
#include <wlr/util/addon.h>
struct wlr_box;
struct wlr_xwm;
struct wlr_data_source;
struct wlr_drag;
@ -285,4 +286,14 @@ bool wlr_xwayland_or_surface_wants_focus(
enum wlr_xwayland_icccm_input_model wlr_xwayland_icccm_input_model(
const struct wlr_xwayland_surface *xsurface);
/**
* Sets the _NET_WORKAREA root window property. The compositor should set
* one workarea per virtual desktop. This indicates the usable geometry
* (relative to the virtual desktop viewport) that is not covered by
* panels, docks, etc. Unfortunately, it is not possible to specify
* per-output workareas.
*/
void wlr_xwayland_set_workareas(struct wlr_xwayland *wlr_xwayland,
const struct wlr_box *workareas, size_t num_workareas);
#endif

1
include/xwayland/xwm.h
View file

@ -88,6 +88,7 @@ enum atom_name {
DND_ACTION_PRIVATE,
NET_CLIENT_LIST,
NET_CLIENT_LIST_STACKING,
NET_WORKAREA,
ATOM_LAST // keep last
};

22
xwayland/xwm.c
View file

@ -90,6 +90,7 @@ static const char *const atom_map[ATOM_LAST] = {
[DND_ACTION_PRIVATE] = "XdndActionPrivate",
[NET_CLIENT_LIST] = "_NET_CLIENT_LIST",
[NET_CLIENT_LIST_STACKING] = "_NET_CLIENT_LIST_STACKING",
[NET_WORKAREA] = "_NET_WORKAREA",
};
#define STARTUP_INFO_REMOVE_PREFIX "remove: ID="
@ -2327,3 +2328,24 @@ enum wlr_xwayland_icccm_input_model wlr_xwayland_icccm_input_model(
}
return WLR_ICCCM_INPUT_MODEL_NONE;
}
void wlr_xwayland_set_workareas(struct wlr_xwayland *wlr_xwayland,
const struct wlr_box *workareas, size_t num_workareas) {
uint32_t *data = malloc(4 * sizeof(uint32_t) * num_workareas);
if (!data) {
return;
}
for (size_t i = 0; i < num_workareas; i++) {
data[4 * i] = workareas[i].x;
data[4 * i + 1] = workareas[i].y;
data[4 * i + 2] = workareas[i].width;
data[4 * i + 3] = workareas[i].height;
}
struct wlr_xwm *xwm = wlr_xwayland->xwm;
xcb_change_property(xwm->xcb_conn, XCB_PROP_MODE_REPLACE,
xwm->screen->root, xwm->atoms[NET_WORKAREA],
XCB_ATOM_CARDINAL, 32, 4 * num_workareas, data);
free(data);
}