exemples/scripts: dwl-tags.sh: display info about dwl tags

examples/scripts/dwl-tags.sh

@@ -0,0 +1,111 @@
+#!/usr/bin/env bash
+#
+# dwl-tags.sh - display dwl tags
+#
+# USAGE: dwl-tags.sh 1
+#
+# REQUIREMENTS:
+#  - inotifywait ( 'inotify-tools' on arch )
+#  - 2021/02/22 - dwl pull request:
+#    'Interface to display tag information on status bar #91'
+#    https://github.com/djpohly/dwl/pull/91
+#
+# TAGS:
+#  Name      Type    Return
+#  -------------------------------------
+#  {dwltag}  string  dwl tags name/state
+#
+# Exemple configuration:
+#  - script:
+#      path: /absolute/path/to/dwl-tags.sh
+#      args: [1]
+#      content: {string: {text: "{dwltag}"}}
+
+
+# Variables
+declare titleline tagline title taginfo isactive ctags mtags layout
+declare symbol_occupied_pre symbol_occupied_post symbol_focused_pre symbol_focused_post
+declare -a tags name
+readonly fname=/tmp/dwltags-"$WAYLAND_DISPLAY"
+
+
+while true; do
+    
+  # Make sure the file exists
+  while [ ! -f "${fname}" ]; do
+    inotifywait -qqe create "$(dirname "${fname}")"
+  done;
+
+  # Wait for dwl to close it after writing
+  inotifywait -qqe close_write "${fname}"
+
+  # Get info from the file
+  titleline="$1"
+  tagline=$((titleline+1))
+  title=$(sed "${titleline}!d" "${fname}")
+  taginfo=$(sed "${tagline}!d" "${fname}")
+  isactive=$(printf -- '%s\n' "${taginfo}" | cut -d ' ' -f 1)
+  ctags=$(printf -- '%s\n' "${taginfo}" | cut -d ' ' -f 2)
+  mtags=$(printf -- '%s\n' "${taginfo}" | cut -d ' ' -f 3)
+  layout=$(printf -- '%s\n' "${taginfo}" | cut -d ' ' -f 4-)
+
+  tags=( "1" "2" "3" "4" "5" "6" "7" "8" "9" )
+
+  # Name of tag (optional)
+  # If there is no name, number are used
+  #
+  # Example:
+  #  name=( "" "" "" "Media" )
+  #  -> return "" "" "" "Media" 5 6 7 8 9)
+  name=()
+
+  # Symbol for occupied tags
+  #
+  # Format: "{symbol_occupied_pre}{TAGNAME}{symbol_occupied_post}"
+  # You can leave one empty if you don't want to surround the TAGNAME
+  symbol_occupied_pre=""
+  symbol_occupied_post="."
+
+  # Symbol for the focused tag
+  #
+  # Format: "{symbol_focused_pre}{TAGNAME}{symbol_focused_post}"
+  # You can leave one empty if you don't want to surround the TAGNAME
+  symbol_focused_pre="[ "
+  symbol_focused_post=" ]"
+
+  for i in {0..8}; do
+    mask=$((1<<i))
+    n="$((tags[i]++))"
+
+    # Occupied
+    if (( "${ctags}" & mask )); then
+      name[i]="${symbol_occupied_pre}${name[i]:-${n}}${symbol_occupied_post}"
+      tags[i]="${name[i]}"
+    else
+      tags[i]="${name[i]:-${n}}"
+    fi
+    
+    # Focused
+    if (( "${mtags}" & mask )); then
+      tags[i]="${symbol_focused_pre}${name[i]:-${n}}${symbol_focused_post}"
+    else
+      tags[i]=" ${name[i]:-${n}} "
+    fi
+
+  done
+  
+  # Format send to yambar
+  #
+  # tags[*]  - array of tags name
+  # layout   - dwl layout (tile, floating, monocle) (optional)
+  # title    - name of the focused client (optional)
+  fmt="${tags[*]} ${layout} [ ${title:-1:50} ]" # Limit title to 50 caracters
+
+  printf -- '%s\n' "dwltag|string|${fmt}"
+  printf -- '%s\n' ""
+
+done
+
+unset -v titleline tagline title taginfo isactive ctags mtags layout 
+unset -v symbol_occupied_pre symbol_occupied_post symbol_focused_pre symbol_focused_post
+unset -v tags name