69 lines
2.3 KiB
Bash
Executable File
69 lines
2.3 KiB
Bash
Executable File
#!/bin/bash
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#===============================================================================
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# Layout Module — Detect layout activation/deactivation events
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#===============================================================================
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# Description:
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# Subscribes to `mmsg watch all-tags` and emits JSON when any tag's layout
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# becomes active or inactive on any monitor.
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#
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# Output format (JSON lines):
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# {"layout":"M","state":"active","monitor":"DP-1","tag":1}
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# {"layout":"M","state":"inactive","monitor":"DP-1","tag":1}
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#
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# Dependencies:
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# - jq
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# - mmsg
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#===============================================================================
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declare -A ACTIVE_LAYOUTS
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make_key() {
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echo "${1}:${2}:${3}"
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}
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process_tags_update() {
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local json="$1"
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local monitors monitor tag layout is_active key new_keys=""
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monitors=$(jq -c '.all_tags[]' <<< "$json" 2>/dev/null)
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while IFS= read -r entry; do
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[[ -z "$entry" ]] && continue
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monitor=$(jq -r '.monitor' <<< "$entry" 2>/dev/null)
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[[ -z "$monitor" ]] && continue
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while IFS= read -r tag_entry; do
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[[ -z "$tag_entry" ]] && continue
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tag=$(jq -r '.index' <<< "$tag_entry" 2>/dev/null)
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layout=$(jq -r '.layout' <<< "$tag_entry" 2>/dev/null)
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is_active=$(jq -r '.is_active' <<< "$tag_entry" 2>/dev/null)
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key=$(make_key "$monitor" "$tag" "$layout")
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new_keys="$new_keys $key"
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if [[ "$is_active" == "true" ]]; then
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if [[ -z "${ACTIVE_LAYOUTS[$key]}" ]]; then
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echo "{\"layout\":\"$layout\",\"state\":\"active\",\"monitor\":\"$monitor\",\"tag\":$tag}"
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fi
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ACTIVE_LAYOUTS["$key"]="active"
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fi
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done < <(jq -c '.tags[]' <<< "$entry" 2>/dev/null)
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done <<< "$monitors"
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for key in "${!ACTIVE_LAYOUTS[@]}"; do
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if [[ ! " $new_keys " =~ $key ]]; then
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IFS=':' read -r monitor tag layout <<< "$key"
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echo "{\"layout\":\"$layout\",\"state\":\"inactive\",\"monitor\":\"$monitor\",\"tag\":$tag}"
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unset "ACTIVE_LAYOUTS[$key]"
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fi
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done
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}
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if ! command -v mmsg &>/dev/null || ! command -v jq &>/dev/null; then
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echo "layout.sh: mmsg and jq are required" >&2
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exit 1
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fi
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while read -r line; do
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process_tags_update "$line"
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done < <(mmsg watch all-tags 2>/dev/null)
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