colorschemes

README.md

colorschemes

Description

Simplistic theme fuzzy finder using themes from iterm2colorschemes.com, jq, and fzf.

Usage

$ colorschemes -h
colorschemes - Search color schemes from https://iterm2colorschemes.com/
usage:
  colorschemes <search>     Fuzzy find a color scheme
  colorschemes -l           Find only light color schemes
  colorschemes -d           Find only dark color schemes
  colorschemes -p <scheme>  Preview color scheme

Install

1. Put this script in ~/bin/colorschemes
2. Run chmod u+x ~/bin/colorschemes

colorschemes.sh

#!/bin/sh
# shellcheck disable=SC3043

COLOR_SCHEMES_HOME="${XDG_CACHE_HOME:-$HOME/.cache}/repos/mbadolato/iterm2-color-schemes"
THIS="$0"

_clone_color_schemes() {
  local lastupdated="$COLOR_SCHEMES_HOME/.lastupdated"

  if [ ! -d "$COLOR_SCHEMES_HOME" ]; then
    echo "Cloning mbadolato/iterm2-color-schemes..."
    git clone --depth 1 --quiet https://github.com/mbadolato/iterm2-color-schemes "$COLOR_SCHEMES_HOME"
    touch "$lastupdated"
  elif [ "$(find "$COLOR_SCHEMES_HOME" -name ".lastupdated" -mtime +7 | wc -l)" -gt 0 ]; then
    echo "Updating mbadolato/iterm2-color-schemes..."
    git -C "$COLOR_SCHEMES_HOME" pull --quiet
    touch "$lastupdated"
  fi
}

_usage() {
  echo "colorschemes - Search color schemes from https://iterm2colorschemes.com/"
  echo "usage:"
  echo "  colorschemes <search>     Fuzzy find a color scheme"
  echo "  colorschemes -l           Find only light color schemes"
  echo "  colorschemes -d           Find only dark color schemes"
  echo "  colorschemes -p <scheme>  Preview color scheme"
}

_isdark() {
  local darkness
  # shellcheck disable=SC2046
  set -- $(_hex2rgb "$1")  # Reset args to RGB values from hex color
  darkness="$(echo "0.2126 * $1 + 0.7152 * $2 + 0.0722 * $3" | bc)"
  test "${darkness%.*}" -lt 40
}

_hex2rgb() {
  printf "ibase=16; %s\n%s\n%s\n" \
    "$(printf "%s" "$1" | cut -c1-2)" \
    "$(printf "%s" "$1" | cut -c3-4)" \
    "$(printf "%s" "$1" | cut -c5-6)" |
    bc
}

_preview_color() {
  local name hex r g b bg fg reset
  name="$1"
  hex="$2"
  # shellcheck disable=SC2046
  set -- $(_hex2rgb "$hex")  # Reset args to RGB values from hex color
  r="$1"
  g="$2"
  b="$3"
  fg="\033[38;2;${r};${g};${b}m"
  bg="\033[48;2;${r};${g};${b}m"
  reset="\033[0m"

  # Output colored text
  printf "${bg}  ${reset} %12s %s rgb(%3s,%3s,%3s)" "$name" "#${hex}" "$r" "$g" "$b"
  printf " ${fg}%s${reset} ${bg}%s${reset}\n" foreground background
}

_preview() {
  local jsonfile filter colorfilter key
  jsonfile="$COLOR_SCHEMES_HOME/vhs/${1}.json"
  if [ ! -f "$jsonfile" ]; then
    echo "No preview available for '$*'."
    return 1
  fi

  colorfilter='ascii_upcase | sub("#"; "")'
  filter='to_entries.[] | select(.key != "name") | .key'
  for key in $(jq -r "$filter" "$jsonfile"); do
    _preview_color "$key" "$(jq -r ".$key | $colorfilter" "$jsonfile")"
  done
}

_list() {
  local jsonfile bg
  for jsonfile in "$COLOR_SCHEMES_HOME"/vhs/*.json; do
    if [ -n "$1" ]; then
      bg="$(jq -r '.background | ascii_upcase | sub("#"; "")' "$jsonfile")"
      if [ "$1" = dark ]; then
        _isdark "$bg" || continue
      elif [ "$1" = light ]; then
        ! _isdark "$bg" || continue
      fi
    fi

    jsonfile="${jsonfile##*/}"
    echo "${jsonfile%.*}"
  done
}

main() {
  local optspec opt OPTARG OPTIND jsonfile selection theme_type fzf_opts

  optspec=":hldp:"
  while getopts "$optspec" opt; do
    case "$opt" in
      h) _usage; return 0     ;;
      l) theme_type="light"   ;;
      d) theme_type="dark"    ;;
      p) _preview "${OPTARG}"; return 0 ;;
      ?) echo >&2 "colorschemes: Invalid option: -${OPTARG}."; exit 1 ;;
    esac
  done
  shift $((OPTIND-1))

  # Wish I knew how to set the preview dynamically based on the theme...
  if [ -n "$theme_type" ]; then
    if [ "$theme_type" = light ]; then
      fzf_opts="--color=${theme_type},preview-fg:0,preview-bg:255"
    elif [ "$theme_type" = dark ]; then
      fzf_opts="--color=${theme_type},preview-fg:255,preview-bg:0"
    fi
  fi

  selection="$(_list "$theme_type" | fzf $fzf_opts --layout=reverse-list --preview="$THIS -p {}" --query="$*")"
  # shellcheck disable=SC2181
  if [ "$?" -eq 0 ]; then
    echo "Selected Theme: $selection"
    _preview "$selection"
  fi
}

# Pre-reqs
if ! command -v jq >/dev/null 2>&1; then
  echo >&2 "colorschemes: Expecting 'jq'."
  echo >&2 "Please use your system's package manager to install (eg: brew install jq)."
  return 1
fi
_clone_color_schemes

# Run colorschemes
main "$@"