faster but quite buggy; no disc state storage

src/sh/fzf.sh

@@ -1,3 +1,54 @@
+# Print the command that sets the header.
+# @argument $1: view
+# @argument $2: mbid
+fzf_command_set_header() {
+  view=$1
+  mbid=$2
+  case "$view" in
+  "$VIEW_SEARCH_ARTIST") header="Search artist on MusicBrainz" ;;
+  "$VIEW_SEARCH_ALBUM") header="Search album on MusicBrainz" ;;
+  "$VIEW_LIST_ARTISTS") header="Search locally available artist" ;;
+  "$VIEW_LIST_ALBUMS") header="Search locally available album" ;;
+  "$VIEW_ARTIST")
+    name="$(mb_artist "$mbid" | $JQ -r '.name')"
+    header=$(printf "$ARTIST_PROMPT" "$name")
+    ;;
+  "$VIEW_RELEASEGROUP")
+    title="$(mb_releasegroup "$mbid" |
+      $JQ -r '.title')"
+    artist="$(mb_releasegroup "$mbid" |
+      $JQ -r '."artist-credit" | map(([.name, .joinphrase]|join(""))) | join("")')"
+    header=$(printf "$FULL_PROMPT" "$artist" "$title")
+    ;;
+  "$VIEW_RELEASE")
+    title="$(mb_release "$mbid" |
+      $JQ -r '.title')"
+    artist="$(mb_release "$mbid" |
+      $JQ -r '."artist-credit" | map(([.name, .joinphrase]|join(""))) | join("")')"
+    header=$(printf "$FULL_PROMPT" "$artist" "$title")
+    ;;
+  esac
+  printf "+change-header(%s)" "${header:-"???"}"
+}
+
+# Print the command that tells fzf to load the data
+# @argument $1: view
+# @argument $2: mbid
+fzf_command_load_data() {
+  view=$1
+  mbid=${2:-}
+  case "$view" in
+  "$VIEW_SEARCH_ARTIST") ;;
+  "$VIEW_SEARCH_ALBUM") ;;
+  "$VIEW_LIST_ARTISTS") ;;
+  "$VIEW_LIST_ALBUMS") ;;
+  "$VIEW_ARTIST") ;;
+  "$VIEW_RELEASEGROUP") ;;
+  "$VIEW_RELEASE") ;;
+  esac
+  printf "+reload($0 --lines %s %s)" "$VIEW_LIST_ARTISTS" ""
+}
+
 # Set prompt of input field
 # @argument $1: view
 # @argument $2: mode
@@ -25,7 +76,7 @@ __set_prompt() {
     ;;
   esac
   [ "$mode" = "$MODE_INSERT" ] && PT="$PROMPT_INSERT" || PT="$PROMPT_NORMAL"
-  printf "+change-prompt(%s %s)" "$PT" "${PROMPT:-"$SEARCH_PROMPT"}"
+  printf "+change-header(%s %s)" "$PT" "${PROMPT:-"$SEARCH_PROMPT"}"
 }
 
 # Reload data for FZF