applescript with Ruby

mac ruby

ふと昨日、itunesをRubyでいじりたいと思って、あえて、流行りのRubyCocoaではなく、applescriptをRubyでいじる方法を調べてみる。

Rubyクックブックには、applescriptというラッパーを使うみたいに書いてあったんだけど、どうもrb-appscriptのほうがいいかんじ。結構、付属のドキュメント(当然、英語だけど)がしっかりしているので助かる。

例えば、iTunesの現在再生している曲名を取得し表示するapplescriptは、こんな感じになるんだが,

tell application "iTunes"
    set cname to name of current track
end tell
display dialog cname

このrb-applescriptを使えば、こんな感じ。

require 'rubygems'
require 'Appscript'

it = Appscript.app 'iTunes'
puts it.current_track.name.get
 => Another Time / Another Story

applescriptの構造がわかっていれば、どうやらそれをrubyっぽく直せば、動きそうなかんじ。

ちなみに、Appscript.app 'iTunes'でみえるメソッドはこんな感じ。

(it.methods - Object.methods).sort
=> ["AS_aem_reference", "AS_aem_reference=", "AS_app_data", "AS_app_data=", 
"AS_new_reference", "EQ", "EQ_enabled", "EQ_presets", "EQ_windows", "ID", "URL_tracks", "[]", 
"_aem_application_class", "_resolve_range_boundary", "_send_command", "abort_transaction", 
"activate", "add", "address", "after", "album", "album_artist", "and", "any", "application", 
"artist", "artworks", "audio_CD_playlists", "audio_CD_tracks", "back_track", "band_1", 
"band_10", "band_2", "band_3", "band_4", "band_5", "band_6", "band_7", "band_8", "band_9", 
"before", "bit_rate", "bookmark", "bookmarkable", "bounds", "bpm", "browser_windows", 
"capacity", "category", "class_", "close", "closeable", "collapseable", "collapsed", 
"collating", "commands", "comment", "compilation", "composer", "container", "contains", 
"convert", "copies", "count", "current_EQ_preset", "current_encoder", "current_playlist", 
"current_stream_URL", "current_stream_title", "current_track", "current_visual", "data", 
"database_ID", "date_added", "delete", "description", "device_playlists", "device_tracks", 
"disc_count", "disc_number", "does_not_contain", "does_not_end_with", "does_not_start_with", 
"download", "downloaded", "duplicate", "duration", "eject", "elements", "enabled", "encoders",
 "end", "end_transaction", "ending_page", "ends_with", "episode_ID", "episode_number", "eq", 
"error_handling", "exists", "fast_forward", "fax_number", "file_tracks", "finish", "first", 
"fixed_indexing", "folder_playlists", "format", "free_space", "frontmost", "full_screen", 
"gapless", "ge", "genre", "get", "grouping", "gt", "id_", "index", "is_in", "is_not_in", 
"items", "keywords", "kind", "last", "launch", "launch", "le", "library_playlists", 
"location", "long_description", "lt", "lyrics", "make", "method_missing", "middle", 
"minimized", "modifiable", "modification_date", "move", "mute", "ne", "next", "next_track", 
"not", "open", "open_location", "or", "pages_across", "pages_down", "parameters", "parent", 
"pause", "persistent_ID", "play", "played_count", "played_date", "player_position", 
"player_state", "playlist_windows", "playlists", "playpause", "podcast", "position", "preamp",
 "previous", "previous_track", "print", "print_settings", "printer_features", "properties", 
"quit", "radio_tuner_playlists", "rating", "refresh", "reopen", "requested_print_time", 
"resizable", "resume", "reveal", "rewind", "run", "sample_rate", "search", "season_number", 
"selection", "set", "shared", "shared_tracks", "show", "shufflable", "shuffle", "size", 
"skipped_count", "skipped_date", "smart", "song_repeat", "sort_album", "sort_album_artist", 
"sort_artist", "sort_composer", "sort_name", "sort_show", "sound_volume", "sources", 
"special_kind", "start", "start_", "start_transaction", "starting_page", "starts_with", 
"stop", "subscribe", "target_printer", "time", "track_count", "track_number", "tracks", 
"unplayed", "update", "updateAllPodcasts", "updatePodcast", "update_tracks", "user_playlists",
 "version", "video_kind", "view", "visible", "visual_size", "visuals", "visuals_enabled", 
"volume_adjustment", "windows", "year", "zoomable", "zoomed"]

ちまちま、いじっていこうと思います。

あと、いい加減、.irbrcに

require 'rubygems'

の一行を追加しました。これで、gemで落としたライブラリも迷わず、irbにrequireできる。大学時代に、gemのrequireではまって以来、gemはrailsを使わない僕には、鬼門です。