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salience / ROS Webb- Source Code Styling

// ==UserScript==
// @name         ROS Webb- Source Code Styling
// @namespace    http://tampermonkey.net/
// @version      1.0.3
// @author       salience
// @copyright    2021, salience (https://openuserjs.org/users/salience)
// @license      MIT
// @match        *http://sedvms1.otsrv.mtrltech.com/syntax_parse/development/*
// @require      https://code.jquery.com/jquery-3.5.1.slim.min.js
// @grant        none
// ==/UserScript==


$(function() {
    var title = $('title');
    var titleArr = title.html().split('/');
    title.html(titleArr[titleArr.length - 1]);

    var content = $('pre'); // Get main code content of page
    var path = (window.location.pathname).replace('/syntax_parse/development/ros_new/', '');
    var pathContainer = '<div style="position:fixed; right: 4px; top: 0; font-family: monospace; font-size: 2.25em; font-weight: bold;">' + path + '</div>';

    if (content.length !== 0) {
        // Insert path/filename box
        content.after(pathContainer);

        // Show letter å/Å
        var contentProcessed = content.html().replace(/ĺ/g, 'å').replace(/Ĺ/g, 'Å');
        content.html(contentProcessed);

        // Process content and insert line numbers
        var lineNumberContainer = $('<span style="border-right:1px solid; float:left; margin:0 2em 0 -1em; text-align:right;"></span>');
        var numberOfLines = content.html().split(/\n/).length;

        for (var j = 0; j < numberOfLines; j++) {
            lineNumberContainer.append('<span class="line-number">' + (j + 1) + '</span>');
        }
        content.prepend(lineNumberContainer);
        content.append('<span style="display:block; clear:both;"></span>');

        $('.line-number').css({
            'display': 'block',
            'padding': '0 .5em 0 1em',
            'color': 'gray'
        });
    }
});