最近Vimのプラグインを作るのにハマっています。先日もdocker.vimというVimからdockerコンテナを操作するプラグインを作りました。
良かった試してみてください。
さて、本題ですがみなさんはBad Apple!!
をご存知でしょうか?
多分ニコニコユーザならほぼ知っているのではないかと思います。
そうです。かの有名な動画です。
その動画のAscii版があり、それならVimで再生できるのでは?と思い帰りの電車の中で作ってみました。
どんな感じ?
こんな感じです。
すこしちらつきますが、まぁ見れなくはないかなと言った感じです。
仕組みは?
とっても簡単です。簡潔に言うとテキストファイルを読み込み、フレーム分のテキストを配列に格納して、あとはfor分で回して画面に描写します。
もう少し細かく解説します。
Asciiテキストファイルの読み込み
Bad Apple!のAsciiテキストファイルはこちらにあるので、それを借用しました。テキストファイル
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見て分かる通り、SPLIT
で区切っています。なので、SPLIT
までを1フレームとしてます。
処理は次になります。
" read file to create framesfunction!s:read_file() abort
letfile= globpath(&rtp,'resources/badapple.txt')" 全frameを格納let frames =[]" 1frame分のテキストを格納let frame =[]for line in readfile(file)" 現在行に`SPLIT`が含まれていなければframeに追加if line !~# "SPLIT"call add(frame, line)else" frameをframes追加call add(frames, frame)let frame =[]endifendforreturn frames
endfunction
なぜframeを配列にしているかというと、vimではバッファにテキストを書き込むsetline()
とpopup windowのバッファに書き込むpopup_settext()
という関数がありますが、
引数に配列を渡すと配列の1要素が1行として画面に出力します。そうすることで改行文字をわざわざ追加しなくて済むのでコードがスッキリします。
画面に出力する
フレームを作る関数を用意したので、それを使用してフレーム情報を変数に格納し、forで1frameずつ画面に出力します。
for frame in frames
" ここで画面にframeを出力するcall popup_settext(winid, frame)" redraw!で画面を再描写する"redraw!" 一瞬で出力が終わってしまうので少し待つ
sleep 50ms
" qで終了できるように`getchar()`で入力した文字を取得" キー入力を待たないように、引数に`0`を渡すlet key = getchar(0)if key ==# 113breakendifendfor" for分を抜けたらウィンドウを閉じる"call popup_close(winid)
まとめ
動画をAsciiテキストに変換して、フレームを定義すれば、どんなものでも同じようなロジックでVim再生できます。
興味ある方はぜひチャレンジしてみてください。