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backend/libinput: Manage tablet tool livetimes

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This adds the management code to manage tablet tools lifetimes from
libinput.
It follows the suggestion made in the tablet-unstable-v2.xml to destroy
tablet_tools once all tablets that it got into contact with were removed
from the system. This is implemented via a refcount.

If a tool is *not* unique, it will be destroyed on proximity out. This
is libinput specific and mentioned in libinput docs that tools will not
be found again, so we shouldn't keep a reference to them.
Also they can't be on other tablets as well, because they cannot be
tracked.

The naming in this commit is a bit off (to not break things).
The wlr names stay the same, tablet_tool is the libinput_device with
capaiblity LIBINPUT_DEVICE_CAP_TABLET_TOOL which is more akin to
"tablet" in the tablet-unstable-v2 protocol.
The struct that corresponds to the tablet_tool in tablet-unstable-v2 is
called tablet_tool_tool, a rename should be done at some point in the
future.
This commit is contained in:
Markus Ongyerth 2018-04-17 19:09:42 +02:00
parent bf8751d632
commit 000b305ecc
4 changed files with 222 additions and 1 deletions
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3
backend/libinput/events.c
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@ -186,6 +186,9 @@ static void handle_device_removed(struct wlr_libinput_backend *backend,
}
struct wlr_input_device *dev, *tmp_dev;
wl_list_for_each_safe(dev, tmp_dev, wlr_devices, link) {
if (dev->type == WLR_INPUT_DEVICE_TABLET_TOOL) {
wlr_libinput_tablet_tool_destroy(dev);
}
wlr_input_device_destroy(dev);
}
for (size_t i = 0; i < backend->wlr_device_lists.length; i++) {