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display: Do not crash attempting to display OSD for unknown Wacom device

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The gnome-control-center has recently allowed unknown tablets to appear
in its UI. The UI provides a "Map Buttons" button that tries to open the
OSD, but if a device is not known there may be no Wacom object to actually
act on.

Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/3722
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/4059>
This commit is contained in:
Jason Gerecke 2024-10-01 14:50:54 -07:00
parent 9d99f538d6
commit 0596ac25d2
1 changed files with 2 additions and 1 deletions
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src/core/display.c
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@ -2709,6 +2709,7 @@ meta_display_request_pad_osd (MetaDisplay *display,
meta_input_mapper_get_device_logical_monitor (input_mapper, pad);
#ifdef HAVE_LIBWACOM
wacom_device = meta_input_device_get_wacom_device (META_INPUT_DEVICE (pad));
if (wacom_device)
layout_path = libwacom_get_layout_filename (wacom_device);
#endif
}