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libweston-desktop: add set_xwayland_position API

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X11 applications expect -geometry command line option to work for
setting the initial window position, but currently this does not work.

Add provision to relay the initial position through libweston-desktop:
- weston_desktop_api gains a new entry set_xwayland_position
- implement set_toplevel_with_position() in xwayland internal interface

Once xwayland plugin starts calling set_toplevel_with_position(),
libweston-desktop can relay that information to a shell if the shell
wants to hear it.

If a shell does not implement the set_xwayland_position hook, the
old behaviour remains: the shell positions xwayland toplevels like any
other.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Reviewed-by: Daniel Stone <daniels@collabora.com>
This commit is contained in:
Pekka Paalanen 2016-11-16 14:03:31 +02:00
parent eed36bbe4c
commit 37111e157a
4 changed files with 59 additions and 0 deletions
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5
libweston-desktop/internal.h
View File

@ -81,6 +81,11 @@ void
weston_desktop_api_minimized_requested(struct weston_desktop *desktop,
struct weston_desktop_surface *surface);
void
weston_desktop_api_set_xwayland_position(struct weston_desktop *desktop,
struct weston_desktop_surface *surface,
int32_t x, int32_t y);
struct weston_desktop_seat *
weston_desktop_seat_from_seat(struct weston_seat *wseat);

10
libweston-desktop/libweston-desktop.c
View File

@ -242,3 +242,13 @@ weston_desktop_api_minimized_requested(struct weston_desktop *desktop,
if (desktop->api.minimized_requested != NULL)
desktop->api.minimized_requested(surface, desktop->user_data);
}
void
weston_desktop_api_set_xwayland_position(struct weston_desktop *desktop,
struct weston_desktop_surface *surface,
int32_t x, int32_t y)
{
if (desktop->api.set_xwayland_position != NULL)
desktop->api.set_xwayland_position(surface, x, y,
desktop->user_data);
}

33
libweston-desktop/libweston-desktop.h
View File

@ -80,6 +80,39 @@ struct weston_desktop_api {
bool maximized, void *user_data);
void (*minimized_requested)(struct weston_desktop_surface *surface,
void *user_data);
/** Position suggestion for an Xwayland window
*
* X11 applications assume they can position their windows as necessary,
* which is not possible in Wayland where positioning is driven by the
* shell alone. This function is used to relay absolute position wishes
* from Xwayland clients to the shell.
*
* This is particularly used for mapping windows at specified locations,
* e.g. via the commonly used '-geometry' command line option. In such
* case, a call to surface_added() is immediately followed by
* xwayland_position() if the X11 application specified a position.
* The committed() call that will map the window occurs later, so it
* is recommended to usually store and honour the given position for
* windows that are not yet mapped.
*
* Calls to this function may happen also at other times.
*
* The given coordinates are in the X11 window system coordinate frame
* relative to the X11 root window. Care should be taken to ensure the
* window gets mapped to coordinates that correspond to the proposed
* position from the X11 client perspective.
*
* \param surface The surface in question.
* \param x The absolute X11 coordinate for x.
* \param y The absolute X11 coordinate for y.
* \param user_data The user_data argument passed in to
* weston_desktop_create().
*
* This callback can be NULL.
*/
void (*set_xwayland_position)(struct weston_desktop_surface *surface,
int32_t x, int32_t y, void *user_data);
};
void

11
libweston-desktop/xwayland.c
View File

@ -257,6 +257,16 @@ set_toplevel(struct weston_desktop_xwayland_surface *surface)
0, 0);
}
static void
set_toplevel_with_position(struct weston_desktop_xwayland_surface *surface,
int32_t x, int32_t y)
{
weston_desktop_xwayland_surface_change_state(surface, TOPLEVEL, NULL,
0, 0);
weston_desktop_api_set_xwayland_position(surface->desktop,
surface->surface, x, y);
}
static void
set_parent(struct weston_desktop_xwayland_surface *surface,
struct weston_surface *wparent)
@ -361,6 +371,7 @@ set_pid(struct weston_desktop_xwayland_surface *surface, pid_t pid)
static const struct weston_desktop_xwayland_interface weston_desktop_xwayland_interface = {
.create_surface = create_surface,
.set_toplevel = set_toplevel,
.set_toplevel_with_position = set_toplevel_with_position,
.set_parent = set_parent,
.set_transient = set_transient,
.set_fullscreen = set_fullscreen,