paste.js

// jshint strict: false

// Taken from medium editor: https://github.com/yabwe/medium-editor/blob/master/src/js/extensions/paste.js

/**
 * pasteUtils -
 * namespaced utility methods for cleaning paste data
 * @access protected
 */
const pasteUtils = {
    createReplacements () {
        return [
            // Remove anything but the contents within the BODY element
            [new RegExp(/^[\s\S]*<body[^>]*>\s*|\s*<\/body[^>]*>[\s\S]*$/g), ''],

            // cleanup comments added by Chrome when pasting html
            [new RegExp(/<!--StartFragment-->|<!--EndFragment-->/g), ''],

            // Trailing BR elements
            [new RegExp(/<br>$/i), ''],

            // replace two bogus tags that begin pastes from google docs
            [new RegExp(/<[^>]*docs-internal-guid[^>]*>/gi), ''],
            [new RegExp(/<\/b>(<br[^>]*>)?$/gi), ''],

            // un-html spaces and newlines inserted by OS X
            [new RegExp(/<span class="Apple-converted-space">\s+<\/span>/g), ' '],
            [new RegExp(/<br class="Apple-interchange-newline">/g), '<br>'],

            // replace google docs italics+bold with a span to be replaced once the html is inserted
            [new RegExp(/<span[^>]*(font-style:italic;font-weight:(bold|700)|font-weight:(bold|700);font-style:italic)[^>]*>/gi), '<span class="replace-with italic bold">'],

            // replace google docs italics with a span to be replaced once the html is inserted
            [new RegExp(/<span[^>]*font-style:italic[^>]*>/gi), '<span class="replace-with italic">'],

            //[replace google docs bolds with a span to be replaced once the html is inserted
            [new RegExp(/<span[^>]*font-weight:(bold|700)[^>]*>/gi), '<span class="replace-with bold">'],

            // replace manually entered b/i/a tags with real ones
            [new RegExp(/&lt;(\/?)(i|b|a)&gt;/gi), '<$1$2>'],

            // replace manually a tags with real ones, converting smart-quotes from google docs
            [new RegExp(/&lt;a(?:(?!href).)+href=(?:&quot;|&rdquo;|&ldquo;|"|“|”)(((?!&quot;|&rdquo;|&ldquo;|"|“|”).)*)(?:&quot;|&rdquo;|&ldquo;|"|“|”)(?:(?!&gt;).)*&gt;/gi), '<a href="$1">'],

            // Newlines between paragraphs in html have no syntactic value,
            // but then have a tendency to accidentally become additional paragraphs down the line
            [new RegExp(/<\/p>\n+/gi), '</p>'],
            [new RegExp(/\n+<p/gi), '<p'],

            // Microsoft Word makes these odd tags, like <o:p></o:p>
            [new RegExp(/<\/?o:[a-z]*>/gi), ''],

            // Microsoft Word adds some special elements around list items
            [new RegExp(/<!\[if !supportLists\]>(((?!<!).)*)<!\[endif]>/gi), '$1']
        ];
    }
};

export default pasteUtils;