Window switcher for sway ('rofi -show window' clone)

sway-window-menu

#!/usr/bin/env bash

set -euo pipefail

tree=$(swaymsg -t get_tree)
readarray -t win_ids <<< "$(jq -r '.. | objects | select(has("app_id")) | .id' <<< "$tree")"
readarray -t win_names <<< "$(jq -r '.. | objects | select(has("app_id")) | .name' <<< "$tree")"
readarray -t win_types <<< "$(jq -r '.. | objects | select(has("app_id")) | .app_id // .window_properties.class' <<< "$tree")"

switch () {
    local k
    read -r k
    swaymsg "[con_id=${win_ids[$k]}] focus"
}

for k in $(seq 0 $((${#win_ids[@]} - 1))); do
    echo -e "<span weight=\"bold\">${win_types[$k]}</span> - ${win_names[$k]}"
done | rofi -dmenu -markup-rows -i -p window -format i | switch

Very nice. I made a few modifications in order to

• show icons with rofi -show-icons
• perform only one call to jq to remove latency.

The window id is encoded inside the strings passed to rofi hidden inside an html comment, for instace <!-- 264 -->, and retrieved later on using sed.

#!/usr/bin/env bash
# Based on https://gist.github.com/lbonn/89d064cde963cfbacabd77e0d3801398 
#
# In order to have meaningful window names for terminals, use

# inside .vimrc:
# set title

# inside .bashrc:
# export PROMPT_COMMAND='echo -en "\033]0; $("pwd")  \a"'

row=$(swaymsg -t get_tree | jq  -r '
    ..
    | objects
    | select(.type == "workspace") as $ws
    | ..
    | objects
    | select(has("app_id"))
    | (if .focused == true then "*" else " " end) as $asterisk
    | "[\($ws.name)] \($asterisk) <span weight=\"bold\">\(.app_id)</span>  - \(.name) <!-- \(.id) -->\u0000icon\u001f\(.app_id)"' \
| sed 's/&/&amp;/g' \
| rofi -dmenu -show-icons -markup-rows)

if [ ! -z "$row" ]
then
    winid=$(echo "$row" | sed 's/.*<!-- \([0-9]*\) -->.*/\1/')
    swaymsg "[con_id=$winid] focus"
fi

... and i rewrote this so it works with fuzzel, which involved (unfortunately) removing the fancy pango markup, but it should work with anything that supports dmenu now (as long as it also supports rofi's icon system):

https://gitlab.com/anarcat/scripts/-/blob/main/sway-window-menu

Sometimes app_ids are not enough in my experience, and sometimes app_ids don't translate to icons.

I updated @bellecp's script to accommodate this:

row=$(swaymsg -t get_tree | jq -r '
    ..
    | objects
    | select(.type == "workspace") as $ws
    | ..
    | objects
    | select(has("app_id"))
    | (if .focused == true then "*" else " " end) as $asterisk
    | (
        if .window_properties.class == "Spotify" then "spotify-client" 
        elif .window_properties.class == "LM Studio" then "lm-studio" 
        else .app_id // .window_properties.class // .name 
      end ) as $icon_name
    | "[\($ws.name)] \($asterisk) <span weight=\"bold\">\(.app_id // .window_properties.class)</span>  - \(.name) <!-- \(.id) -->\u0000icon\u001f\($icon_name)"
    ' |
	sed 's/&/&amp;/g' |
	rofi -dmenu -show-icons -markup-rows -p "window")

if [ ! -z "$row" ]; then
	winid=$(echo "$row" | sed 's/.*<!-- \([0-9]*\) -->.*/\1/')
	swaymsg "[con_id=$winid] focus"
fi

There probably is a better way at detecting icons (rofi -show window) does a somewhat better job. I guess you might be able to map the app names to icons thorugh their .desktop files.

Great work, everyone! I've tested the solutions above. Since I use fuzzel, I came up with this approach to address the issue with icons and XWayland apps that don't have an app_id.

# Parse the Sway tree to generate a formatted list of windows for fuzzel.
selected_window=$( swaymsg -t get_tree | jq -r '
	..
	# Get workspaces and customize workspace names
	| objects | select(.type == "workspace") as $workspace
	| ( if $workspace.name == "__i3_scratch" 
		then "-" else $workspace.name end 
	  ) as $ws_name 

        | ..
	# Get opened apps and set "focused" decoration
        | objects | select(has("app_id"))
	| (if .focused == true then "🟢" else "" end) as $selected

	# Exclude apps from list
	| select(.app_id == null or (.app_id | test("pavucontrol") | not))
	
	# Manually set icons to fix cases where they are not displayed
	| ( "vivaldi-pjibgclleladliembfgfagdaldikeohf-Default" ) as $spotify
	| ( if .name != null and (.name | test("Spotify")) then $spotify
		elif .app_id == "Firefox" then "firefox" 
		else .app_id // .window_properties.class // .name end
	  ) as $icon
	
	# Fix for displaying app_id when it is null
	| ( if .app_id == null and (.name | test("Spotify")) then "Spotify" 
		else .name end 
	  ) as $app_id

	# Set dmenu item format (keep the icon separated from the rest)
	# Output ex: 📂 (101) [1] 🟢File Explorer 
	| "(\(.id)) [\($ws_name)] \($selected)\($app_id)" +
	  "\u0000icon\u001f\($icon)"' \
	| fuzzel -d -w 50
)

# Focus the selected window.
if [ "$selected_window" != "" ]; then
	window_id=$(echo "$selected_window" | sed 's/.*(\([[:digit:]]*\)).*/\1/')
	swaymsg [con_id="$window_id"] focus
fi

I've also tried to improve the readability by adding comments to make the code easier to understand. Additionally, I published this version in my repository (sway-util-scripts/window_switcher.sh), referencing this gist and some other links I found online.

Cheers from Brazil!🇧🇷