Commit Graph

344 Commits

Author SHA1 Message Date
Scott Moreau 3b4824a2fe xwayland: Expose configure request mask
Without this information, compositors have no way to tell whether
or not to consider the position information valid. Most notably,
a compositor needs to know if it should pick a position for the
surface or use the position sent in the configure request.
2019-10-08 19:46:06 +03:00
Antonin Décimo 8d5f27ef25 xwayland: prevent possible array overrun 2019-08-12 09:37:21 +09:00
Simon Ser ca45f4490c Remove all wayland-server.h includes
The documentation for wayland-server.h says:

> Use of this header file is discouraged. Prefer including
> wayland-server-core.h instead, which does not include the server protocol
> header and as such only defines the library PI, excluding the deprecated API
> below.

Replacing wayland-server.h with wayland-server-core.h allows us to drop the
WL_HIDE_DEPRECATED declaration.
2019-07-27 15:49:32 -04:00
Manuel Stoeckl edb30a6828 Implement serial validation for selection requests
This change tracks, for each wlr_seat_client, the most recent serial
numbers which were sent to the client. When the client makes a
selection request, wlroots now verifies that the serial number
associated with the selection request was actually provided to that
specific client. This ensures that the client that was most
recently interacted with always has priority for its copy selection
requests, and that no other clients can incorrectly use a larger serial
value and "steal" the role of having the copy selection.

Also, the code used to determine when a given selection is superseded
by a newer request uses < instead of <= to allow clients to make
multiple selection requests with the same serial number and have the
last one hold.

To limit memory use, a ring buffer is used to store runs of sequential
serial numbers, and all serial numbers earlier than the start of the
ring buffer are assumed to be valid. Faking very old serials is
unlikely to be disruptive.

Assuming all clients are correctly written, the only additional
constraint which this patch should impose is that serial numbers
are now bound to seats: clients may not receive a serial number
from an input event on one seat and then use that to request
copy-selection on another seat.
2019-06-30 15:01:05 -04:00
emersion 8363ca8c9f
xwayland: set CLOEXEC on /dev/null FD
This avoids leaking the FD to Xwayland and its children.
2019-03-06 00:32:24 +01:00
emersion 9601019192 xwayland: don't set DISPLAY
Let the compositor set it. This allows for multiple Xwayland instances to run
at the same time.

Fixes https://github.com/swaywm/wlroots/issues/1442
2019-03-04 12:54:06 -07:00
Ilia Bozhinov fb106eb979 xwm: fix typos in WM_NORMAL_HINTS handling 2019-03-04 18:49:39 +01:00
Ilia Bozhinov c9b9e48525 xwm: use min size as base size hint if it is missing and vice versa
This is what ICCCM states that a WM should do.
2019-03-03 14:13:55 -07:00
emersion 5445d8aad0 meson: enable more compiler warnings 2019-03-01 09:20:23 +01:00
emersion cfe7e28416
xwayland: remove remaining SOCK_CLOEXEC 2019-02-20 17:04:00 +01:00
emersion cb0a91e45a
xwayland: don't use SOCK_CLOEXEC
SOCK_CLOEXEC isn't POSIX.
2019-02-19 16:38:45 +01:00
emersion 81ed1efe4f
xwayland, data-device: fix surface state on unmap
This commit makes sure surface->mapped is true when the unmapped event is
emitted. This is necessary because listeners can only damage surfaces that are
mapped. This is similar to the fact that the destroy event is emitted before
any destruction is actually made.

Fixes https://github.com/swaywm/sway/issues/3568
2019-02-18 13:14:35 +01:00
Uli Schlachter e7d9cf5815 xwm: Add _NET_CLIENT_LIST support
Fixes: https://github.com/swaywm/wlroots/issues/1469
Signed-off-by: Uli Schlachter <psychon@znc.in>
2019-02-15 11:08:54 +01:00
Brian Ashworth db6206aa1c xwm: stack below on map
Since xwm only manipulates the stack when focusing a window, newly
mapped windows should be stacked below the focused window. This prevents
the newly mapped window from stealing focus due to being on the top of
the stack.
2019-02-13 18:52:06 +01:00
emersion 556bf3ac31
data-device: destroy previous source when starting drag
This supersedes f24e17259e and
04c9ca4198. These commits were manually removing
wlr_data_source destroy handlers when starting a new drag. This is error-prone.

Instead, this commit destroys the previous source whenever we start a new drag.
2019-02-05 18:43:06 +01:00
John Chen 819bd3e344 Fix another instance of swaywm/sway#3545. 2019-02-03 15:11:21 +08:00
emersion 1150ff13ce
data-device: make sources inert, rename cancel to destroy 2019-01-24 12:12:55 +01:00
emersion 4cb0697e57 data-device, primary-selection: add request_set_selection
This makes compositors able to block and/or customize set_selection requests
coming from clients. For instance, it's possible for a compositor to disable
rich selection content (by removing all MIME types except text/plain). This
commit implements the design proposed in [1].

Two new events are added to wlr_seat: request_set_selection and
request_set_primary_selection. Compositors need to listen to these events and
either destroy the source or effectively set the selection.

Fixes https://github.com/swaywm/wlroots/issues/1138

[1]: https://github.com/swaywm/wlroots/issues/1367#issuecomment-442403454
2019-01-24 11:38:23 +01:00
emersion 06467d2e12
primary-selection: add a serial argument
The serial needs to be bumped when X11 clients set the selection, otherwise
some Wayland clients (e.g. GTK) will overwrite it when they gain focus.
2019-01-21 19:23:40 +01:00
Dominique Martinet 384642b394 xwayland: remove clearenv() call
This has been causing troubles for some of our users and only been there
for legacy reasons, we trust Xwayland just as much as your next program
and weston doesn't take any such care when starting it.
2018-12-13 09:06:28 +09:00
emersion 9f0720c03a
primary-selection: introduce wlr_primary_selection_source
This is a common interface that can be used for all primary selection
protocols, as discussed in [1]. A new function wlr_seat_set_primary_selection
is added to set the primary selection for all protocols.

The seat now owns again the source, and resets the selection to NULL when
destroyed.

[1]: https://github.com/swaywm/wlroots/issues/1367#issuecomment-442403454
2018-11-29 19:40:28 +01:00
emersion bfa7f4ee0d
gtk-primary-selection: use impl pattern for sources 2018-11-27 20:16:55 +01:00
emersion f001f98cef
gtk-primary-selection: refactor everything, untie from seat
This commits completely refactors wlr_gtk_primary_selection. The goal is to
remove gtk-primary-selection state from the seat and better handle inert
resources where it makes sense.

wlr_seat_client.primary_selection_devices has been removed and replaced by
wlr_gtk_primary_selection_device. This allows us to make offers inert when the
current selection is replaced.

wlr_seat_set_primary_selection has been removed because it relied on wlr_seat
instead of wlr_gtk_primary_selection_device_manager. A new function,
wlr_gtk_primary_selection_device_manager_set_selection (candidate for the
longest function name in wlroots) has been added. It doesn't take a serial
anymore as serial checking only makes sense for set_selection requests coming
from Wayland clients (serial checking is now done in the Wayland interface
implementation).

Since wlr_gtk_primary_selection_device_manager is now required to set the
selection, a new function wlr_xwayland_set_gtk_primary_selection_device_manager
(candidate number two for longest function name) has been added.

Devices are now made inert when the seat goes away.

Future work includes removing the last primary selection bits from the seat,
mainly wlr_seat.primary_selection_source and wlr_seat.events.primary_selection,
replacing those with new fields in wlr_gtk_primary_selection_device. Or maybe
we could keep those in the seat and replace them with a re-usable interface
(for future zwp_primary_selection_v1 support). We need to think how we'll sync
these three protocols (GTK, X11 and wayland-protocols).

See https://github.com/swaywm/wlroots/issues/1388
2018-11-27 18:57:26 +01:00
emersion 811a4d997b
Rename wlr_primary_selection to wlr_gtk_primary_selection 2018-11-23 11:58:56 +01:00
emersion 51bfdd620e
Use #if instead of #ifdef for wlroots config data
This prevents some annoying issues when e.g. not including wlr/config.h or
making a typo in the guard name.
2018-11-12 10:12:46 +01:00
emersion 2d0c5ec78e
Use _POSIX_C_SOURCE, use shm_open 2018-11-06 08:29:23 +01:00
emersion 54e78e9e26
xwayland: don't fail if XDG_RUNTIME_DIR is not set
We don't require it, Xwayland doesn't require it, and all X11 apps I tried
don't need it.
2018-10-28 22:39:57 +01:00
emersion f745befc06
xwayland: fix typo to enable transparency
We spent literally hours trying to debug this. Turns out it's a typo.

Kill me.
2018-10-27 11:59:27 +02:00
Ryan Dwyer bc52de031e xwm: Unset min/max size hints if they're not used 2018-10-22 21:49:17 +10:00
Ryan Dwyer 5c5296c912 xwm: Remove child->parent pointer when parent destroys 2018-10-19 23:03:58 +10:00
emersion 9a2fb6f568
xwayland: handle configure event mask 2018-10-18 14:31:08 +02:00
Wolf480pl 3512db3ded xwayland/xwm: make hints->input default to true
An X11 client can leave the hints->input WM hint unspecified,
by not setting the XCB_ICCCM_WM_HINT_INPUT flag in hints->flags.
In that case, we should assume a sane default.

Make the hint default to true, so that clients which do not specify
the hint, like mupdf, still get keyboard focus.

This should fix swaywm/sway#2231
2018-10-13 00:20:22 +02:00
Arkadiusz Hiler ae7c3f3d1c xwayland/xwm: Stop including xcb_image.h
It's not used (XCB_IMAGE_FORMAT_Z_PIXMAP comes from xproto.h) and we
don't even have a pkg-config dependency on xcb-image, making the build
to fail on that inclusion on systems without the package.
2018-09-28 11:47:50 +03:00
Ryan Dwyer 44613c0fa6 xwayland: Introduce set_decorations event 2018-09-24 20:14:02 +10:00
nyorain 195103700c Fix wlr_xwayland_destroy 2018-09-08 13:00:56 +02:00
Drew DeVault 73423c988c
Merge pull request #1213 from arandomhuman/wlr_log_get_verbosity
Add wlr_log_get_verbosity method
2018-09-03 11:15:12 -04:00
random human 93382dc445
Close stdout/stderr for Xwayland
Depending on the log verbosity, close the stdout/stderr streams.
2018-09-03 17:33:48 +05:30
Ryan Dwyer b8cc4a4152 xwayland: Introduce set_role event 2018-09-03 17:07:14 +10:00
Ryan Dwyer 60a174eb11 xwayland: Introduce request_activate event 2018-09-02 08:50:17 +02:00
Ryan Dwyer 69a5279f79 xwayland: Add WM_STATE modal property
Adds a modal property to indicate whether the surface wants to be a
modal.
2018-09-02 08:50:04 +02:00
Scott Anderson fd3fa760d3 Revert "Revert "Merge pull request #1194 from ascent12/meson_feature""
This reverts commit 9c886f20b9.
2018-08-24 19:35:02 +12:00
Drew DeVault 9c886f20b9 Revert "Merge pull request #1194 from ascent12/meson_feature"
This breaks wlroots when used as a meson subproject.

This reverts commit dea311992e, reversing
changes made to 6db9c4b746.
2018-08-23 21:00:58 -04:00
Scott Anderson 51892e0d74 Install headers explicitly 2018-08-22 21:16:16 +12:00
Scott Anderson 784c20c82f Use new options for X11 backend and Xwayland 2018-08-22 20:27:37 +12:00
Markus Ongyerth 81cc842f8f reintroduce xwayland is_unmanaged
153f37bdf5 (#1145) removed the
wlr_xwayland_is_unamanged function while fixing OR, because it was
belieived that it's supposed to work around the broken OR handling.

This was a misunderstanding. is_unmanaged is (while sort of a hack)
intended to work around inherent differences between "real" X sessions
and our Xwayland/wayland situation.

The main reason it exists is to support applications like rofi and dzen,
while not handing focus to other OR windows (which should *not* be
required).
Traditionally, these applications just grabbed input from X and didn't
need to be focused by any logic in the WM. Which of course doesn't work
in wayland compositors. So we have to give them focus in some way.
Giving *every* OR window focus, breaks other applications that don't
expect focus to change.

A testcase that was pointed out to me where wlr_xwayland_is_unamanged was
breaking things is https://github.com/swaywm/sway/issues/2128 (syncplay,
gitk, gitgui)
Supposedly it broke using keyboard to navigate the menus.
I can't reproduce this with this patch. The popups can be navigated as
long as the parent has focus.
2018-07-29 14:43:17 +02:00
Drew DeVault f1b65b34a6
Merge pull request #1127 from emersion/surface-precommit
surface: add wlr_surface_role.precommit
2018-07-27 13:21:03 -04:00
Drew DeVault 4b096fc114 Revert "Merge pull request #1153 from emersion/include-config"
This reverts commit ef0a6ea4d2, reversing
changes made to 8d03bc9178.
2018-07-21 09:44:20 -04:00
emersion 41094a7df5 Always include config.h 2018-07-21 13:08:23 +01:00
Ryan Dwyer dc58c1356d Introduce set_hints event for xwayland 2018-07-19 21:07:11 +10:00
emersion 5dca4741df xwayland: make xwm_surface_activate static 2018-07-18 19:59:58 +01:00
emersion 153f37bdf5 xwayland: handle override_redirect flag changes
The override_redirect flag can change on configure notify and
on map notify. This adds an event to know when it changes.

This removes wlr_xwayland_surface_is_unmanaged which was wrongly
using the window type to decide whether the view should be
unmanaged.

A similar patch was proposed to Weston, but has never been
merged upstream [1].

[1]: https://patchwork.freedesktop.org/patch/211161/
2018-07-18 18:51:03 +01:00
emersion 16d7e09d99 surface: add wlr_surface_role.precommit
This allows to emit the unmap event before the surface becomes
actually unmapped for most shells.
2018-07-15 19:30:19 +01:00
Drew DeVault e226e2c011 Missed some old wlr_log calls 2018-07-11 18:36:31 -04:00
Drew DeVault c0b4217fce
Merge pull request #1116 from emersion/surface-role
surface: replace wlr_surface_set_role_committed with wlr_surface_role
2018-07-11 15:27:42 -07:00
emersion 7cbef15206
util: add wlr_ prefix to log symbols 2018-07-09 22:49:54 +01:00
emersion 33db4263a0
surface: replace wlr_surface_set_role_committed with wlr_surface_role 2018-07-07 22:45:16 +01:00
Armin Preiml 26b2012b5e fix style issue 2018-07-03 15:11:02 +02:00
Armin Preiml e6d613ca2e fix: add stack update on focus change
Enable the stack update again for focus changes on non-focusable views.
2018-07-03 15:03:00 +02:00
Armin Preiml f93234d6f5 fix: tabs instead of spaces 2018-06-29 19:25:20 +02:00
Armin Preiml d0b3aed584 do not send focus request to a window that doesn't allow this 2018-06-29 17:58:47 +02:00
Dominique Martinet 4a1c9a1925 xwm: fix use-after-free involving parents/children
Happens when e.g. closing gimp.

==24039==ERROR: AddressSanitizer: heap-use-after-free on address 0x6150001a7a78 at pc 0x7f09b09f1bb2 bp 0x7ffcf0237bf0 sp 0x7ffcf0237be0
WRITE of size 8 at 0x6150001a7a78 thread T0
    #0 0x7f09b09f1bb1 in wl_list_remove ../util/signal.c:55
    #1 0x7f09b094cf03 in xwayland_surface_destroy ../xwayland/xwm.c:295
    #2 0x7f09b0950245 in xwm_handle_destroy_notify ../xwayland/xwm.c:717
    #3 0x7f09b095304a in x11_event_handler ../xwayland/xwm.c:1149
    #4 0x7f09b0c68f01 in wl_event_loop_dispatch src/event-loop.c:641
    #5 0x7f09b0c67601 in wl_display_run src/wayland-server.c:1260
    #6 0x40a2f4 in main ../sway/main.c:433
    #7 0x7f09b011018a in __libc_start_main (/lib64/libc.so.6+0x2318a)
    #8 0x40b749 in _start (/opt/wayland/bin/sway+0x40b749)

0x6150001a7a78 is located 120 bytes inside of 496-byte region [0x6150001a7a00,0x6150001a7bf0)
freed by thread T0 here:
    #0 0x7f09b2b58880 in __interceptor_free (/lib64/libasan.so.5+0xee880)
    #1 0x7f09b094d1a1 in xwayland_surface_destroy ../xwayland/xwm.c:315
    #2 0x7f09b0950245 in xwm_handle_destroy_notify ../xwayland/xwm.c:717
    #3 0x7f09b095304a in x11_event_handler ../xwayland/xwm.c:1149
    #4 0x7f09b0c68f01 in wl_event_loop_dispatch src/event-loop.c:641
    #5 0x7f09b0c67601 in wl_display_run src/wayland-server.c:1260
    #6 0x40a2f4 in main ../sway/main.c:433
    #7 0x7f09b011018a in __libc_start_main (/lib64/libc.so.6+0x2318a)
    #8 0x40b749 in _start (/opt/wayland/bin/sway+0x40b749)

previously allocated by thread T0 here:
    #0 0x7f09b2b58e50 in calloc (/lib64/libasan.so.5+0xeee50)
    #1 0x7f09b094b585 in xwayland_surface_create ../xwayland/xwm.c:119
    #2 0x7f09b0950151 in xwm_handle_create_notify ../xwayland/xwm.c:706
    #3 0x7f09b0953032 in x11_event_handler ../xwayland/xwm.c:1146
    #4 0x7f09b0c68f01 in wl_event_loop_dispatch src/event-loop.c:641
    #5 0x7f09b0c67601 in wl_display_run src/wayland-server.c:1260
    #6 0x40a2f4 in main ../sway/main.c:433
    #7 0x7f09b011018a in __libc_start_main (/lib64/libc.so.6+0x2318a)
    #8 0x40b749 in _start (/opt/wayland/bin/sway+0x40b749)
2018-06-25 17:28:44 +09:00
Ilia Bozhinov 5dd1a838f3 xwm: set the proper event mask in client messages
Fixes #927
2018-05-26 10:08:20 +03:00
Scott Anderson 1a3921d4d4 Remove unused argument 2018-05-19 23:39:51 +12:00
Vincent Vanlaer 72a75b3a72 Fix Xwayland cleanup
Fixes #964
2018-05-10 01:44:17 +02:00
emersion 8e831cd416
Merge pull request #959 from VincentVanlaer/xwayland-lazy
Add the option to start Xwayland only when a client connects
2018-05-08 23:04:26 +01:00
Vincent Vanlaer 119a6cf35c Make xwayland_finish* clean up wlr_xwayland 2018-05-08 22:22:35 +02:00
Vincent Vanlaer 80586b8f6b Clean up events 2018-05-07 00:48:02 +02:00
Vincent Vanlaer 446ea3a340 Add beter handling for Xwayland failing at startup 2018-05-07 00:43:26 +02:00
Vincent Vanlaer c80bf1591e Allow xwayland to start lazily
Makes the xwayland startup process two phased.
The first phase just initialises the X11 sockets.
The second phase starts the Xwayland server itself.
When starting xwayland lazily the second phase will be postponed until
a client has connected to the X11 socket.

Changes in behaviour:
The DISPLAY environment is now set immediately after the X11 sockets
are created.
When the Xwayland server is killed or crashes, the sockets will not be
recreated, but reused.

Fixes #849: Start up Xwayland lazily
2018-05-06 23:41:25 +02:00
emersion cf10cbc00c
Use UTF-8 xwayland window title if available 2018-05-04 20:44:00 +01:00
emersion 001045e47a
xwayland: make utility windows unmanaged again
7f70d244a9 made utility windows
managed, because it made sense according to the spec. Turns out
Firefox uses them for popups.
2018-04-27 10:44:20 +01:00
Drew DeVault 04af09862a
Merge pull request #918 from emersion/xwayland-unmapped-request-configure
xwayland: forward configure events to compositor when unmapped
2018-04-27 10:49:31 +02:00
emersion 7f70d244a9
xwayland: fix some Chromium comboboxes
Some comboboxes (e.g. in chrome://flags) are advertized as…
Notifications of course! Yeah, notifications, the thing that
tells you you have mail, your battery is low, or the dog has
eaten your carpet. This isn't the first time we notice Chromium's
X11 backend is pretty shit.

Anyway, added notifications and splash screens to the list of
unmanaged windows. Also removed utility windows because those
should be managed, but maybe I'm wrong and I'll revert this.
2018-04-26 23:18:59 +01:00
emersion af668ceb7c
xwayland: forward configure events to compositor when unmapped 2018-04-26 22:18:31 +01:00
emersion c119c43b48
xwayland/selection: fix little memory leak on error 2018-04-26 15:59:58 +01:00
Drew DeVault fac2c3e25f
Merge pull request #882 from emersion/unprefix-local-symbols
Remove wlr_ prefix from local symbols
2018-04-26 11:18:01 +02:00
Guido Guenther 085452f9d9 Use correct printf format specifiers for ssize_t
This unbreaks the build on armhf that otherwise fails like

    ../xwayland/selection/incoming.c: In function 'xwm_data_source_write':
    ../include/wlr/util/log.h:34:17: error: format '%ld' expects argument of type 'long int', but argument 6 has type 'ssize_t {aka int}' [-Werror=format=]
      _wlr_log(verb, "[%s:%d] " fmt, wlr_strip_path(__FILE__), __LINE__, ##__VA_ARGS__)
                     ^
    ../xwayland/selection/incoming.c:34:2: note: in expansion of macro 'wlr_log'
      wlr_log(L_DEBUG, "wrote %zd (chunk size %ld) of %d bytes",
      ^~~~~~~
    ../xwayland/selection/incoming.c:34:44: note: format string is defined here
      wlr_log(L_DEBUG, "wrote %zd (chunk size %ld) of %d bytes",
                                              ~~^
                                              %d
2018-04-26 10:46:11 +02:00
emersion 625a7a48dc
Don't use the wlr_ prefix for static functions 2018-04-25 23:51:00 +01:00
emersion 71ca45e2c0
Make sure we don't use others' prefixes 2018-04-25 23:24:58 +01:00
Drew DeVault 12bf39a715
Merge pull request #885 from emersion/remove-surface-subsurface
Remove wlr_surface::subsurface, add wlr_subcompositor
2018-04-22 10:54:15 +02:00
n3rdopolis a470f101c1
xwayland: preserve the PATH variable
Some systems don't have xwayland in /usr/bin, but in other paths. 
wlroots was unable to find Xwayland binaries outside of standard locations
2018-04-21 19:19:25 -04:00
emersion 3bce5dfc9f
Fix segfaults in wlr_surface_is_* 2018-04-21 19:04:48 +01:00
emersion fa02e30adf
xwayland: emit new_surface when unmapped 2018-04-13 14:37:13 +02:00
emersion 8dec7036d0
Always unmap before destroying surface 2018-04-11 23:09:13 -04:00
emersion 17d0440b75
Add wlr_xwayland_surface_ping 2018-04-08 16:28:01 -04:00
emersion c55ad11d96
xwayland: add _NET_WM_WINDOW_TYPE_MENU support 2018-04-08 12:02:52 -04:00
emersion 8b07a4d055
Emit xwayland unmap signal before unmapping
This allows compositors to access the surface being unmapped. This
is also more consistent with the destroy signal.
2018-04-06 14:13:52 -04:00
emersion 591ea27cf9
xwayland: refactor selection code 2018-04-03 12:56:54 -04:00
emersion 67dec2da2b
xwayland: fix incoming incr transfers 2018-04-03 11:26:55 -04:00
emersion 58ac05c276
Merge branch 'master' into xwayland-dnd 2018-04-03 10:38:46 -04:00
emersion 1cd7ff7d3a
xwayland: use strndup in xwm_get_atom_name 2018-04-03 10:36:22 -04:00
emersion d7e03c7adc
xwayland: fix outgoing incr transfers 2018-04-03 10:25:50 -04:00
emersion 8f84c5b05f
xwayland: only send one target at a time 2018-04-03 00:44:04 -04:00
emersion 103e59703f
xwayland: improve xwm_selection_send_notify 2018-04-02 21:55:09 -04:00
Drew DeVault 506acbdecd Missed a spot 2018-04-02 20:57:09 -04:00
emersion 92b74071d0
xwayland: support multiple wayland → xwayland selection transfers
This fixes drag'n'drop support for Chromium.
2018-04-02 19:56:41 -04:00
emersion 8836b4f024
Merge branch 'master' into xwayland-dnd 2018-04-02 15:57:04 -04:00
emersion 692f1746cf
xwayland: specify xwm cursor stride in bytes 2018-03-31 00:22:58 -04:00
emersion 865b0aa123
xwayland: rename map_notify to map for consistency 2018-03-30 11:01:23 -04:00
emersion cadfccf1fd
xwayland: use a separate window for drag'n'drop 2018-03-29 17:53:47 -04:00