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Vimでスワイプしたい

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はじめに

iVimを使っているとスワイプでスクロールしたくなります。
指を2本使えばホイール相当の動きをしますが、スマホなら1本指でやりたいものです。
探してみると、マークのおもしろい使い方を見つけたので共有しておきます。

スクリプト

function! Swipe()
    "mark b is the current cursor position
    "mark a is the previous cursor position
    normal mb
    let currPos=line('.')
    normal `a
    let prevPos=line('.')
    if currPos>prevPos
        normal `bma
        execute "normal! \<C-e>"
    elseif currPos<prevPos
        normal `bma
        execute "normal! \<C-y>"
    endif
endfunction

map <silent> <LeftDrag> ma<LeftMouse>:call Swipe()<CR>

解説

ほとんど参考そのままです。
ドラッグすると最初の位置をマーク(ma)した後<LeftMouse>を呼びます。
<LeftMouse>のデフォルト動作はカーソル移動なので、カーソルのある位置をマークできます(mb)。
最後に2つの行数を比べてスクロールします。

参考

slin
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