bar_cmd_bind: utilize mouse button helpers

This modifies `bar_cmd_bindsym` to use `get_mouse_bindsym` for parsing
mouse buttons. This also introduces `cmd_bar_bindcode`, which will use
`get_mouse_bindcode` for parsing mouse buttons. Like sway bindings, the
two commands are encapsulated in a single file with shared code.

This also modifies swaybar to operate off of event codes rather than x11
button numbers, which allows for any mouse button to be used.

This introduces two new IPC properties:
- For `get_bar_config`, `event_code` has been added to the `bindings`
section and will include to event code for the button. If the event code
can be mapped to a x11 button, `input_code` will still be the x11 button
number. Otherwise, `input_code` will be `0`.
- Likewise for `click_events`, `event` has been added and will include
the event code for the button clicked. If the event code can be mapped
to a x11 button, `button` will still be the x11 button number.
Otherwise, `button` will be `0`.

1 files changed, 12 insertions, 4 deletions

diff --git a/sway/sway-bar.5.scd b/sway/sway-bar.5.scd
index 2357591d..ac1949b7 100644
--- a/sway/sway-bar.5.scd
+++ b/sway/sway-bar.5.scd
@@ -71,10 +71,18 @@ Sway allows configuring swaybar in the sway configuration file.
 *height* <height>
         Sets the height of the bar. Default height will match the font size.
 
-*bindsym* [--release] button<n> <command>
-        Executes _command_ when mouse button _n_ has been pressed (or if _released_
-        is given, when mouse button _n_ has been released). To disable the default
-        behavior for a button, use the command _nop_.
+*bindcode* [--release] <event-code> <command>
+        Executes _command_ when the mouse button has been pressed (or if _released_
+        is given, when the button has been released). The buttons can be given as
+        an event code, which can be obtaining from `libinput debug-events`. To
+        disable the default behavior for a button, use the command _nop_.
+
+*bindsym* [--release] button[1-9]|<event-name> <command>
+        Executes _command_ when the mouse button has been pressed (or if _released_
+        is given, when the button has been released). The buttons can be given as a
+        x11 button number or an event name, which can be obtained from `libinput
+        debug-events`. To disable the default behavior for a button, use the
+        command _nop_.
 
 *mode* dock|hide|invisible
         Specifies the visibility of the bar. In _dock_ mode, it is permanently