// ==UserScript==
// @name         中国知网CNKI硕博论文PDF下载
// @version      0.3
// @description  add PDF download button to CNKI.
// @author       leftjie
// @include        http*://*/kcms/detail/detail.aspx?dbcode=CMFD*
// @include        http*://*/kcms/detail/detail.aspx?dbcode=CDFD*
// @include        http*://*/KCMS/detail/detail.aspx?dbcode=CMFD*
// @include        http*://*/KCMS/detail/detail.aspx?dbcode=CDFD*
// @match        http*://kns.cnki.net/kcms/detail/detail.aspx?dbcode=CMFD*
// @match        http*://kns.cnki.net/kcms/detail/detail.aspx?dbcode=CDFD*
// @match        http*://kns.cnki.net/KCMS/detail/detail.aspx?dbcode=CMFD*
// @match        http*://kns.cnki.net/KCMS/detail/detail.aspx?dbcode=CDFD*
// @grant        none
// @namespace https://greasyfork.org/users/244539
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';
    window.onload = function(){
        var url = window.location.href;
        var dllink = document.getElementsByClassName('operate-btn');
        var dl = "";
        for (var i = 0;i <= dllink.length; i++) {
            var nhdown = dllink[i].getElementsByTagName('a');
            if (i == 0){
                dl = nhdown[1].href.replace('dflag=nhdown','dflag=pdfdown').replace('dflag=cajdown','dflag=pdfdown');
            }else{
                dl = nhdown[0].href.replace('dflag=nhdown','dflag=pdfdown').replace('dflag=cajdown','dflag=pdfdown');
            }
            var li = document.createElement('li');
            var a = document.createElement('a');
            li.className = "btn-dlpdf";
            a.innerHTML = "<i></i>PDF 下载";
            a.href = dl;
            a.style.backgroundColor="#fb4376";
            li.appendChild(a);
            document.getElementsByClassName('operate-btn')[i].appendChild(li);
        }
    };
})();