mirror of
https://github.com/lhns/steam-frame-nix.git
synced 2026-10-06 06:00:22 +02:00
Pierre Kisters
4c843c3ce4
Document the patch calling convention once in lib/default.nix; patch headers say what, target, hook, state and contracts. Comments only, no code changes.
124 lines
4.1 KiB
Bash
124 lines
4.1 KiB
Bash
# shellcheck shell=bash
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# Hicolor fallbacks for desktop entry icons that only Breeze has.
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# Usage: steam-frame-icon-fallbacks [EXTRA_NAME...]
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# BREEZE_APPS=<breeze-icons>/share/icons/breeze/apps: link each Icon= name
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# (of the entries Steam sees, plus EXTRA_NAMEs) that no hicolor dir has
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# but Breeze does as $XDG_DATA_HOME/icons/hicolor/scalable/apps/<name>.svg.
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# BREEZE_APPS unset: remove the links made before.
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# Only links listed in the manifest and still pointing into breeze-icons are
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# ever removed.
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data_home=${XDG_DATA_HOME:-$HOME/.local/share}
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dest=$data_home/icons/hicolor/scalable/apps
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manifest=${XDG_STATE_HOME:-$HOME/.local/state}/steam-frame-nix/icon-fallbacks
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# Steam's data dirs (XDG_DATA_HOME, then its XDG_DATA_DIRS on SteamOS), not
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# the caller's: switches usually run from the nested desktop session.
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data_dirs=(
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"$data_home"
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"$HOME/.local/share/flatpak/exports/share"
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/var/lib/flatpak/exports/share
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/usr/local/share
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/usr/share
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"$HOME/.nix-profile/share"
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/nix/var/nix/profiles/default/share
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)
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shopt -s nullglob
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ours() { [[ -L $1 && $(readlink "$1") == /nix/store/*-breeze-icons-*/* ]]; }
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# Does Steam already find <name> (hicolor in any data dir, or pixmaps)?
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# Our own links don't count.
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resolves() {
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local d f
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for d in "$HOME/.icons" "${data_dirs[@]/%//icons}"; do
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for f in "$d"/hicolor/*/*/"$1".{png,svg,xpm}; do
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ours "$f" || return 0
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done
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done
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for d in "${data_dirs[@]}"; do
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for f in "$d"/pixmaps/"$1".{png,svg,xpm}; do [[ ! -e $f ]] || return 0; done
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done
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return 1
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}
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# Largest Breeze app icon for <name> (Breeze's app icons are all SVG).
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breeze() {
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local size
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for size in 64 48 32 24 22 16; do
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if [[ -e $BREEZE_APPS/$size/$1.svg ]]; then echo "$BREEZE_APPS/$size/$1.svg"; return; fi
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done
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return 1
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}
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# Icon= of a desktop entry, unless it is Hidden/NoDisplay or not a plain icon
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# name (e.g. an absolute path).
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entry_icon() {
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awk -F= '
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/^\[/ { group = ($0 ~ /^\[Desktop Entry\][[:space:]]*$/); next }
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!group { next }
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{ key = $1; sub(/[[:space:]]+$/, "", key); val = substr($0, index($0, "=") + 1)
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gsub(/^[[:space:]]+|[[:space:]\r]+$/, "", val) }
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(key == "Hidden" || key == "NoDisplay") && val == "true" { skip = 1 }
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key == "Icon" { icon = val }
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END { if (!skip && icon ~ /^[A-Za-z0-9._+-]+$/) print icon }
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' "$1"
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}
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# Wanted: extra names, and the icons of the entries Steam sees (the first
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# entry with a given desktop-file ID wins, like in the menu).
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declare -A wanted=() seen=()
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if [[ -n ${BREEZE_APPS:-} ]]; then
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for name in "$@"; do wanted[$name]=extra; done
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for d in "${data_dirs[@]}"; do
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[[ -d $d/applications ]] || continue
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while IFS= read -r -d '' f; do
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id=${f#"$d/applications/"}; id=${id//\//-}
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[[ -z ${seen[$id]:-} ]] || continue
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seen[$id]=1
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icon=$(entry_icon "$f")
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[[ -z $icon ]] || wanted[$icon]=${wanted[$icon]:-$id}
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done < <(find -L "$d/applications" -name '*.desktop' -print0 2>/dev/null)
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done
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fi
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changed=
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linked=()
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for name in "${!wanted[@]}"; do
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resolves "$name" && continue
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if ! src=$(breeze "$name"); then
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[[ ${wanted[$name]} != extra ]] || echo "icon fallbacks: Breeze has no app icon \"$name\" (extra)" >&2
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continue
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fi
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link=$dest/$name.svg
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if [[ -e $link || -L $link ]] && ! ours "$link"; then continue; fi # not ours
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linked+=("$name")
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[[ $(readlink "$link") == "$src" ]] && continue
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mkdir -p "$dest"
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ln -sfn "$src" "$link"
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echo "icon fallbacks: linked $name (${wanted[$name]})"
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changed=1
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done
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# Remove links from earlier runs that are no longer wanted.
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if [[ -f $manifest ]]; then
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while IFS= read -r name; do
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[[ -n $name && " ${linked[*]} " != *" $name "* ]] || continue
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if ours "$dest/$name.svg"; then
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rm -f "$dest/$name.svg"
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echo "icon fallbacks: removed $name"
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changed=1
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fi
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done < "$manifest"
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fi
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if (( ${#linked[@]} )); then
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mkdir -p "${manifest%/*}"
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printf '%s\n' "${linked[@]}" | sort > "$manifest"
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else
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rm -f "$manifest"
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fi
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# GTK rescans an icon theme only when a theme dir's mtime changes; bump it
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# so a running Steam sees the change.
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if [[ -n $changed && -d $data_home/icons/hicolor ]]; then touch "$data_home/icons/hicolor"; fi
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