nl_tokens: 设置 Editor . md 的整体主题，主要是工具栏 Setting Editor . md theme
pl_tokens: function ( theme ) { var editor = this . editor ; var oldTheme = this . settings . theme ; var themePrefix = this . classPrefix + "theme-" ; editor . removeClass ( themePrefix + oldTheme ) . addClass ( themePrefix + theme ) ; this . <mask> . theme = theme ; return this ; }