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# -*- geiser-default-implementation: chicken; -*-
#+TITLE: Mowedline init
Load the =matchable= module so I can use =match-lambda=.
#+BEGIN_SRC scheme
(use matchable dbus)
#+END_SRC
Set the default font and color to something nicer.
#+BEGIN_SRC scheme
(text-widget-font "Fantasque Sans Mono-13:bold")
(text-widget-color "#ededed")
#+END_SRC
Define a convenience function to check if a formatter's argument is
not some text.
#+BEGIN_SRC scheme
(define (not-text? text)
(or (null? text) (and (not (pair? text)) (string-null? text))))
#+END_SRC
Define a convenience function that adds spaces around its argument if
its argument is text.
#+BEGIN_SRC scheme
(define (text-maybe-pad-both text)
(if (not-text? text)
text
(list " " text " ")))
#+END_SRC
Define a convenience function to add a Font Awesome icon to a widget.
#+BEGIN_SRC scheme
(define (add-fa-icon icon)
(lambda (text)
(if (not-text? text)
text
(list (list 'font "FontAwesome-10"
(string-append " " icon " "))
text))))
#+END_SRC
* Tag list
This formatter will parse the herbstluftwm tag status line, which
looks like this:
#+BEGIN_EXAMPLE
#1 -2 :3 :4 :5 .6 .7 .8 .9
#+END_EXAMPLE
And turn it into something more useful. The symbols before the tag
names (numbers) have the following meaning:
- =#= :: This tag is currently active.
- =-= :: This tag is visible on another monitor.
- =:= :: This tag isn't displayed, but has windows on it.
- =.= :: This tag isn't displayed and is empty.
- =!= :: This tag has an urgent window on it.
First the tag line has to be split into separate parts. Each tag
status/name pair is split by a tab character and each status is only
one character. So I split the whole string on tabs and then make a
list out of each individual part, for easy access to the status
character. So we end up with something like:
#+BEGIN_EXAMPLE
((#\# #\1) (#\- #\2) (#\: #\3) ...)
#+END_EXAMPLE
#+BEGIN_SRC scheme
(define (split-tag-list str)
(map string->list (string-split str "\t")))
#+END_SRC
Next we turn each part into something practical for display in
mowedline.
#+BEGIN_SRC scheme
(define tag-display
(match-lambda
((#\# . name-list)
(list '(color "#ececec" font "FontAwesome-10" "")
(string-append " " (list->string name-list) " ")))
((#\- . _) '((color "#bfbfbf" font "FontAwesome-10" "") " "))
((#\: . _) '((color "#969696" font "FontAwesome-10" "") " "))
((#\! . _) '((color "#a85454" font "FontAwesome-10" "") " "))
(_ '())))
(define (tag-list-display tag-list)
(map tag-display tag-list))
#+END_SRC
Finally, bring it all together in a function that can be used as a
mowedline text formatter.
#+BEGIN_SRC scheme
(define (tag-list-formatter text)
(tag-list-display (split-tag-list text)))
#+END_SRC
Define the widget to be used in the window.
#+BEGIN_SRC scheme
(define taglist-widget
(widget:text #:name "taglist" #:format tag-list-formatter))
#+END_SRC
* Email
Define a widget to show email notifications in.
#+BEGIN_SRC scheme
(define email-widget
(widget:text
#:name "email"
#:format (compose text-maybe-pad-left (add-fa-icon ""))))
#+END_SRC
* Battery
I'm on a laptop and seeing the state of my battery is pretty important.
#+BEGIN_SRC scheme
(define (clamp x low high)
(max low (min high x)))
(define (source:sys)
(list
(/ (clamp (with-input-from-file
"/sys/class/power_supply/BAT0/capacity"
read)
0 100)
100.0)
(with-input-from-file
"/sys/class/power_supply/BAT0/status"
read)))
(define (widget:battery)
(widget:text
font: "FontAwesome-10"
format:
(compose
text-maybe-pad-left
(match-lambda
((capacity status)
(list
(list-ref
'((color "#a85454" "")
(color "#a88654" "")
(color "#8d995c" "")
(color "#65a854" "")
(color "#5476a8" ""))
(inexact->exact
(round (* 4 capacity))))
(if (eq? 'Charging status) " " "")))
(val val)))
init: (lambda (widget)
(widget-update-at-interval widget 5 source:sys))))
#+END_SRC
* The window
Create a mowedline window, put it at the bottom.
#+BEGIN_SRC scheme
(define clipboard-widget
(widget:text #:format text-maybe-pad-left))
(let ((ctx (make-context #:service 'org.gnome.GPaste
#:interface 'org.gnome.GPaste1
#:path "/org/gnome/GPaste")))
(register-signal-handler ctx
"Update"
(lambda (type replace id)
(update clipboard-widget "Text copied!")
(thread-start! (make-thread (lambda ()
(thread-sleep! 3)
(update clipboard-widget "")))))))
(window #:position 'bottom
#:width 1843
#:margin-bottom 15
#:margin-left 46
#:margin-right 15
#:background 'transparent
taglist-widget
(widget:spacer #:flex 1)
clipboard-widget
(widget:text #:name "irc" #:format (lambda (text) (text-maybe-pad-left (with-input-from-string text read))))
email-widget
(widget:battery)
(widget:clock #:format text-maybe-pad-left))
#+END_SRC
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