2024-01-28 08:06:40 +00:00
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#+title: Mode-Line
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2024-01-28 04:31:58 +00:00
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#+setupfile: ../headers
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#+property: header-args:emacs-lisp :tangle no :exports results :cache yes :noweb yes
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2024-01-28 08:06:40 +00:00
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* Mode-Line
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2024-01-28 04:31:58 +00:00
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** Mode-Line
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:PROPERTIES:
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:header-args:lisp: :mkdirp yes :tangle ~/.stumpwm.d/modeline.lisp
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:END:
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The timeout of the modeline indicates how often it refreshes in
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seconds. I think two seconds is good.
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#+begin_src lisp
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(setf *mode-line-timeout* 2)
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#+end_src
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*** Formatting Options
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Next we get to the content of the modeline. This format follows the
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format indicated in the manpage of ~date~.
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#+begin_src lisp
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(setf *time-modeline-string* "%F %H:%M")
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#+end_src
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Let’s also indicate how the groupname is displayed.
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#+begin_src lisp
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(setf *group-format* "%t")
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#+end_src
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The window format should display first its window number, then its
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titled, limited to 30 characters.
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#+begin_src lisp
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(setf *window-format* "%n: %30t")
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#+end_src
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*** Mode-Line Theme
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The modeline is pretty easy. First, let’s load the ~colors.lisp~ file we just created:
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#+begin_src lisp
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(load "~/.stumpwm.d/colors.lisp")
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#+end_src
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Next, we can set some colours for the modeline. Let’s set the
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background of the modeline to Nord1 and the foreground to Nord5, I
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think this is a pretty good combination.
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#+begin_src lisp
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(setf *mode-line-background-color* phundrak-nord1
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,*mode-line-foreground-color* phundrak-nord5)
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#+end_src
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We /could/ also use some borders in the modeline. But we won’t. Let’s
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still set its colour to Nord1, just in case.
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#+begin_src lisp
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(setf *mode-line-border-color* phundrak-nord1
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,*mode-line-border-width* 0)
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#+end_src
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*** Mode-Line Modules
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Here are some modules that we will load for the modeline:
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#+name: modeline-modules
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#+caption: Modules used by the modeline
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| Module Name | Why Do I Need It? |
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|------------------+--------------------------------------------------|
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| battery-portable | Get information on the battery level of a laptop |
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| cpu | Get the CPU usage |
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| mpd | Display MPD’s status |
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| mem | Get the memory usage |
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#+name: gen-load-modeline-modules
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#+header: :wrap src lisp
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#+begin_src emacs-lisp :var modules=modeline-modules
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(mapconcat (lambda (module)
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(format "(load-module \"%s\")" (car module)))
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modules
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"\n")
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#+end_src
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#+RESULTS[20a1d5d9c6e0136d6a130b1c1b4bd4d742aead8a]: gen-load-modeline-modules
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#+begin_src lisp
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(load-module "battery-portable")
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(load-module "cpu")
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(load-module "mpd")
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(load-module "mem")
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#+end_src
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We need to set some variables, so modules can be displayed correctly.
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Note that the character between the font switchers in the second CPU
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formatter is U+E082, which symbolizes the CPU.
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#+begin_src lisp
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(setf cpu::*cpu-modeline-fmt* "%c"
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cpu::*cpu-usage-modeline-fmt* "^f2^f0^[~A~2D%^]"
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mem::*mem-modeline-fmt* "%a%p"
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mpd:*mpd-modeline-fmt* "%a - %t"
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mpd:*mpd-status-fmt* "%a - %t"
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,*hidden-window-color* "^**"
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,*mode-line-highlight-template* "«~A»")
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#+end_src
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*** Generating the Mode-Line
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We can indicate what to display in our modeline. Each formatter will
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be separated by a Powerline separator with the code point ~0xE0B0~ in
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2024-09-21 13:27:37 +00:00
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the font I am using (see [[file:theme.md#fonts][Theme » Fonts]]).
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2024-01-28 04:31:58 +00:00
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#+name: modeline-format
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#+caption: Formatters for the modeline
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| Formatter | What it does | Command? |
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|----------------+-------------------------------------------------------+----------|
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| ~%g~ | Display list of groups | |
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| ~%W~ | Display list of windows in the current group and head | |
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| ~^>~ | Rest of the modeline align to the right | |
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| ~docker-running~ | Display number of docker containers currently running | yes |
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| ~mu-unread~ | Display number of unread emails | yes |
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| ~%m~ | Display current MPD song | |
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| ~%C~ | Display CPU usage | |
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| ~%M~ | Display RAM usage | |
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| ~%B~ | Display battery status | |
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| ~%d~ | Display date | |
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#+name: modeline-format-gen
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#+begin_src emacs-lisp :var elements=modeline-format :exports none
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(mapcar (lambda (element)
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(cons (format "\"%s\""
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(string-replace (regexp-quote "~")
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""
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(car element)))
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(string= "yes" (caddr element))))
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elements)
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#+end_src
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#+RESULTS[4246baab1293d54bcd2223590f274152f24934c3]: modeline-format-gen
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: (("%g") ("%W") ("^>") ("docker-running" . t) ("mu-unread" . t) ("%m") ("%C") ("%M") ("%B") ("%d"))
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#+begin_src lisp :noweb yes
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(defvar *mode-line-formatter-list*
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'<<modeline-format-gen()>>
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"List of formatters for the modeline.")
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#+end_src
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As you can see, ~generate-modeline~ generates the string defining
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~*screen-mode-line-format*~ from the list of formatters we gave it with
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the table [[modeline-format]].
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#+begin_src lisp
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(defun generate-modeline (elements &optional not-invertedp rightp)
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"Generate a modeline for StumpWM.
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ELEMENTS should be a list of `cons'es which `car' is the modeline
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formatter or the shell command to run, and their `cdr' is either nil
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when the `car' is a formatter and t when it is a shell command."
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(when elements
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(cons (format nil
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" ^[~A^]^(:bg \"~A\") "
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(format nil "^(:fg \"~A\")^(:bg \"~A\")^f1~A^f0"
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(if (xor not-invertedp rightp) phundrak-nord1 phundrak-nord3)
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(if (xor not-invertedp rightp) phundrak-nord3 phundrak-nord1)
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(if rightp "" ""))
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(if not-invertedp phundrak-nord3 phundrak-nord1))
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(let* ((current-element (car elements))
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(formatter (car current-element))
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(commandp (cdr current-element)))
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(cons (if commandp
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`(:eval (run-shell-command ,formatter t))
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(format nil "~A" formatter))
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(generate-modeline (cdr elements)
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(not not-invertedp)
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(if (string= "^>" (caar elements)) t rightp)))))))
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#+end_src
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It is then easy to define a command that can call this function and
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set this variable, so we can sort of reload the mode-line.
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#+begin_src lisp
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(defcommand reload-modeline () ()
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"Reload modeline."
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(sb-thread:make-thread
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(lambda ()
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(setf *screen-mode-line-format*
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(cdr (generate-modeline *mode-line-formatter-list*))))))
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#+end_src
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And actually, let’s reload the modeline immediately.
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#+begin_src lisp
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(reload-modeline)
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#+end_src
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*** TODO Investigate why ~stumptray~ acts up :noexport:
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Systray overlaps with the far-right part of the modeline.
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# Also, let’s enable a system tray.
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# #+begin_src lisp
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# (load-module "stumptray")
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# (stumptray::stumptray)
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# #+end_src
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# Don’t forget to run src_lisp[:exports code]{(ql:quickload :xembed)} in
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# ~sbcl~ at least once to install its dependencies.
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