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# Folder Structure of Key Mapper
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Stuff has to be placed in `/usr/share/X11/xkb` to my knowledge. In order to
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be able to make backups of the configs, which would be expected in the
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users home directory, this is symlinked to home where the actual files are.
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Every user gets a path within that `/usr/...` directory which is very
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unconventional, but it works. This way the presets of multiple users
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don't clash.
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**Presets**
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- `/usr/share/X11/xkb/symbols/key-mapper/<user>/<device>/<preset>`
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- `/home/<user>/.config/key-mapper/<device>/<preset>`
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This is how a single preset is stored. The path in /usr is a symlink, the
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files are actually in home.
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**Defaults**
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- `/usr/share/X11/xkb/symbols/key-mapper/<user>/default`
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- `/home/<user>/.config/key-mapper/default`
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This is where key-mapper stores the defaults. They are generated from the
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parsed output of `xmodmap` and used to keep the unmapped keys at their system
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defaults.
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**Keycodes**
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- `/usr/share/X11/xkb/keycodes/key-mapper`
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Because the concept of "reasonable symbolic names" ([www.x.org](https://www.x.org/releases/X11R7.7/doc/xorg-docs/input/XKB-Enhancing.html))
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doesn't apply when mouse buttons are all over the place, an identity mapping
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to make generating "symbols" files easier/possible exists. A keycode of
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10 will be known as "<10>" in symbols configs. This has the added benefit
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that keycodes reported by xev can be identified in the symbols file.
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