GitHub Sourcegraph Button

An userscript to add "Sourcegraph" button on github.
Verze ze dne 27. 07. 2017. Zobrazit nejnovější verzi.
Zeptejte se na otázku, přidejte recenzi nebo skript nahlašte.
Wrap lines
// ==UserScript==
// @name         GitHub Sourcegraph Button
// @namespace    yikai.info
// @version      1.0.0
// @description  An userscript to add "Sourcegraph" button on github.
// @author       martianyi
// @match        https://github.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    var rawUrl = '';

    function replace(){
        var rawBtn = document.querySelector('#raw-url');
        if(rawUrl !== rawBtn.href){
            rawUrl = rawBtn.href;
            createButton(rawBtn);
        }
    }

    function createButton(btn) {

        var newBtn = btn.cloneNode(false);
        newBtn.removeAttribute("id");
        newBtn.setAttribute('class', 'btn btn-sm BtnGroup-item');
        newBtn.textContent = "Sourcegraph";
        newBtn.href = "";
        newBtn.addEventListener('click', goToSourcegraph);

        btn.parentNode.insertBefore(newBtn, btn.nextSibling);

        if (!btn.parentNode.classList.contains("btn-group")) {
            var parent = btn.parentNode,
                group = document.createElement("div");
            group.className = "btn-group";
            while (parent.childNodes.length) {
                group.appendChild(parent.childNodes[0]);
            }
            parent.appendChild(group);
        }
    }

    function goToSourcegraph(event) {
        event.preventDefault();
        var pats = [
            ['^/([^/]+)/([^/]+)/tree/([^/]+)$', '/github.com/$1/$2@$3', '^/github.com/([^/]+)/([^/@]+)@([^/]+)$', '/$1/$2/tree/$3'],
            ['^/([^/]+)/([^/]+)/tree/([^/]+)/(.+)$', '/github.com/$1/$2@$3/-/tree/$4', '^/github.com/([^/]+)/([^/@]+)@([^/]+)/-/tree/(.+)$', '/$1/$2/tree/$3/$4'],
            ['^/([^/]+)/([^/]+)/blob/([^/]+)/(.+)$', '/github.com/$1/$2@$3/-/blob/$4', '', ''],
            ['^/([^/]+)/([^/]+)$', '/github.com/$1/$2', '^/github.com/([^/]+)/([^/]+)$', '/$1/$2'],
            ['^/([^/]+)$', '/$1', '^/([^/]+)$', '/$1'],
        ];
        var pathname = window.location.pathname;
        for (var i = 0; i < pats.length; i++) {
            var pat = pats[i];
            var r,
                pathname2;
            if (window.location.hostname === 'github.com') {
                if (pat[0] === '') {continue;}
                r = new RegExp(pat[0]);
                if (pathname.match(r)) {
                    pathname2 = pathname.replace(r, pat[1]);
                    window.location = 'https://sourcegraph.com' + pathname2;
                    return;
                }
            } else {
                if (pat[2] === '') { continue; }
                r = new RegExp(pat[2]);
                if (pathname.match(r)) {
                    pathname2 = pathname.replace(r, pat[3]);
                    window.location = 'https://github.com' + pathname2;
                    return;
                }
            }
        }
        alert('Unable to jump to Sourcegraph (no matching URL pattern).');
    }

    var container =
        document.querySelector("#js-repo-pjax-container") ||
        document.querySelector("#js-pjax-container");

    if (container) {
        new MutationObserver(function(){
            replace();
        }).observe(container, {childList: true, subtree: true});
    }

    replace();
})();