4d317eae17
Our filtered frame (frame without any button events) that gets passed down to here may include relative motion or other events. Once we use that frame to prepend the button event we need to reset it so we don't cause duplicate motion and/or events with zero delta timestamps. With the the previous code we got two identical frames: 42: event25: plugin button-debounce - 0.360 EV_MSC MSC_SCAN 30 ... event25: plugin button-debounce - 0.360 EV_KEY BTN_RIGHT 1 ... event25: plugin button-debounce - 0.360 EV_REL REL_X -7 ... event25: plugin button-debounce - 0.360 EV_REL REL_Y -7 ... event25: plugin button-debounce - 0.360 ----------------- EV_SYN ----------------- +8ms ... Plugin:button-debounce - debounce state: DEBOUNCE_STATE_IS_UP → DEBOUNCE_EVENT_OTHERBUTTON → DEBOUNCE_STATE_IS_UP ... Plugin:button-debounce - debounce state: DEBOUNCE_STATE_IS_UP → DEBOUNCE_EVENT_PRESS → DEBOUNCE_STATE_IS_DOWN_WAITING ... event25: plugin evdev - 0.360 EV_MSC MSC_SCAN 30 ... event25: plugin evdev - 0.360 EV_REL REL_X -7 ... event25: plugin evdev - 0.360 EV_REL REL_Y -7 ... event25: plugin evdev - 0.360 EV_KEY BTN_RIGHT 1 ... event25: plugin evdev - 0.360 ----------------- EV_SYN ----------------- +0ms ... Queuing event25 POINTER_MOTION +0.000s -7.00/ -7.00 ( -7.00/ -7.00) ... event25 - middlebutton state: MIDDLEBUTTON_IDLE → MIDDLEBUTTON_EVENT_R_DOWN → MIDDLEBUTTON_RIGHT_DOWN, rc 1 ... event25: plugin evdev - 0.360 EV_MSC MSC_SCAN 30 ... event25: plugin evdev - 0.360 EV_REL REL_X -7 ... event25: plugin evdev - 0.360 EV_REL REL_Y -7 ... event25: plugin evdev - 0.360 EV_KEY BTN_RIGHT 1 ... event25: plugin evdev - 0.360 ----------------- EV_SYN ----------------- +0ms ... Queuing event25 POINTER_MOTION +0.000s -nan/ -nan ( -7.00/ -7.00) event25 POINTER_MOTION +0.360s -7.00/ -7.00 ( -7.00/ -7.00) event25 POINTER_MOTION 2 +0.360s -nan/ -nan ( -7.00/ -7.00) The 0ms delta caused a -nan in the custom pointer accel but even without that bug the pointer would've jumped more than it should. Closes #1172 Part-of: <https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/1301> |
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libinput
libinput is a library that provides a full input stack for display servers and other applications that need to handle input devices provided by the kernel.
libinput provides device detection, event handling and abstraction to minimize the amount of custom input code the user of libinput needs to provide the common set of functionality that users expect. Input event processing includes scaling touch coordinates, generating relative pointer events from touchpads, pointer acceleration, etc.
User documentation
Documentation explaining features available in libinput is available here.
This includes the FAQ and the instructions on reporting bugs.
Source code
The source code of libinput can be found at: https://gitlab.freedesktop.org/libinput/libinput
For a list of current and past releases visit: https://www.freedesktop.org/wiki/Software/libinput/
Build instructions: https://wayland.freedesktop.org/libinput/doc/latest/building.html
Reporting Bugs
Bugs can be filed on freedesktop.org GitLab: https://gitlab.freedesktop.org/libinput/libinput/issues/
Where possible, please provide the libinput record output
of the input device and/or the event sequence in question.
See https://wayland.freedesktop.org/libinput/doc/latest/reporting-bugs.html for more info.
Documentation
- Developer API documentation: https://wayland.freedesktop.org/libinput/doc/latest/development.html
- High-level documentation about libinput's features: https://wayland.freedesktop.org/libinput/doc/latest/features.html
- Build instructions: https://wayland.freedesktop.org/libinput/doc/latest/building.html
- Documentation for previous versions of libinput: https://wayland.freedesktop.org/libinput/doc/
Examples of how to use libinput are the debugging tools in the libinput repository. Developers are encouraged to look at those tools for a real-world (yet simple) example on how to use libinput.
- A commandline debugging tool: https://gitlab.freedesktop.org/libinput/libinput/tree/main/tools/libinput-debug-events.c
- A GTK application that draws cursor/touch/tablet positions: https://gitlab.freedesktop.org/libinput/libinput/tree/main/tools/libinput-debug-gui.c
License
libinput is licensed under the MIT license.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: [...]
See the COPYING file for the full license information.
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