// ==UserScript==
// @name         百度文库（wenku）在线下载PDF格式文件BX
// @version       1.0
// @description    基于《百度文库（wenku）在线下载PDF格式文件》修改部分代码，修复了打印页面空白问题。可将需要下载券的全文打印成pdf，或者说所能看到的就能转成pdf/下载后的pdf文件可以在 https://pdf2docx.com/zh/ 上转换成docx
// @author       ChaorenLong
// @namespace
// @require      https://cdn.bootcss.com/jquery/2.2.4/jquery.js
// @match        *://wenku.baidu.com/view/*
// @match        *://wenku.baidu.com/share/*
// @grant        unsafeWindow
// @license      GPL-2.0
// @icon         https://www.baidu.com/cache/icon/favicon.ico
// @namespace https://greasyfork.org/users/874459
// @downloadURL none
// ==/UserScript==
//感谢原作者 eko.zhan, HelloCodeMing 的脚本支持；

; (function () {
    'use strict'
    window.onload = function(){
        const moreBtn = document.getElementsByClassName("goBtn")[0];
        moreBtn.click();
        insert();
    };

    //insert print btn
    function insert() {
        if ($('#btnPrintStyle').length == 0) {
            $('head').append(
                [
                    '<style id="btnPrintStyle">',
                    '.ez-btn{background-color: rgb(68,178,158);border-radius: 6px;color: #fff;border: 0;height: 30px;line-height: 30px;width: 92px;margin-top: 2px;display: block;position: relative;left: 9px;float: left;font-size: 16px;overflow: hidden;text-overflow: ellipsis;white-space: nowrap;text-align: left;padding-left: 15px;transition: opacity .3s;}',
                    '.ez-btn:hover{background-color:#ff4e26;}',
                    '.ez-btn[title]:hover:after {content: attr(_title);position: absolute;top: -4px;left: 105%;min-width: 100px;max-width: 300px; padding: 4px 10px;background: #000000;color: #ffffff;border-radius: 4px;text-align:left;z-index:2021;}',
                    '.ez-panel{z-index:2021;display:none;position: absolute;width: 300px;font-size:14px;background: #ffffff;color: #ff4e26;  border-radius: 4px;  border: 1px solid #ff4e26;  padding: 6px;  margin: 2px;}',
                    '#doc-header-test .doc-value{margin-right: 10px !important;padding-right: 10px;}',
                    '@media print {body {display: block !important;}}',
                    '</style>'
                ].join(' ')
            )
        }
        $('body').append(
            [
                '<div class="ez-panel">',
                '<i><h3 style = "font-weight:600;color:black;font-size: 15px;">若点击后无反应，请允许弹出窗口</h3></i>',
                '<h3 style = "font-weight:600;color:black;font-size: 15px;"><i>跳转到新页面请耐心等待页面加载完成</i></h3>',
                '常见问题：<br/>',
                '1、<a href="https://greasyfork.org/zh-CN/forum/discussion/46222/x" target="_blank">点击免费下载后，如何打印成pdf文件？</a>',
                '<br/>2、<a href="https://greasyfork.org/zh-CN/forum/discussion/44509/x" target="_blank">文字重叠重影该如何解决？</a>',
                '<br/>3、<a href="https://greasyfork.org/zh-CN/forum/discussion/47744/x" target="_blank">图片空白，或者图片只有一半的情况如何处理？</a>',
                '<br/>4、<a href="https://greasyfork.org/zh-CN/forum/discussion/46249/x" target="_blank">页数超过100页的文档该如何打印成pdf？</a>',
                '<br/>5、<a href="https://greasyfork.org/zh-CN/forum/discussion/47743/x" target="_blank">打印出来的pdf文件里文字断裂，或者图片表格上下页分开如何处理？</a>',
                '<div>'
            ].join('')
        )

        if(window.location.pathname.indexOf('share')!= -1){
            $('h3').remove();
            if($('.center')){
                $('.center').append('<button class="ez-btn">免费下载</button>')//链接为share按钮位置，此处修改
            }}else if(window.location.pathname.indexOf('share')== -1){if($('.topbar-container')){
                $('.topbar-container').append('<button class="ez-btn">免费下载</button>')//链接为view按钮位置，此处修改
            }}

        //删除多余元素，或者使其隐藏
        if($('.owner-desc-wrap')[0]){
            $('.owner-desc-wrap')[0].setAttribute('style','display:none');
        }
        if($('.header-wrap')[0]){
            $('.header-wrap')[0].setAttribute('style','display:none');
        }
        if($('.aside')[0]){
            $('.aside')[0].setAttribute('style','display:none');
        }
        if($('.fix-searchbar-wrap')[0]){
            $('.fix-searchbar-wrap')[0].remove();
        }
        if($('.top-ads-banner-wrap')[0]){
            $('.top-ads-banner-wrap')[0].remove();
        }
        if($('#activity-tg')[0]){
            $('#activity-tg')[0].remove();
        }
        if($('.crubms-wrap')[0]){
            $('.crubms-wrap')[0].setAttribute('style','display:none');
        }
        if($('.doc-tag-wrap')[0]){
            $('.doc-tag-wrap')[0].setAttribute('style','display:none');
        }
        if($('.doc-value')[0]){
            $('.doc-value')[0].setAttribute('style','display:none');
        }
        if($('.doc-bottom-wrap')[0]){
            $('.doc-bottom-wrap')[0].setAttribute('style','display:none');
        }
        if($('#next_doc_box')[0]){
            $('#next_doc_box')[0].setAttribute('style','display:none');
        }
        if($('.left')[0]){
            $('.left')[0].setAttribute('style','display:none');
        }
        if($('.centerRight')[0]){
            $('.centerRight')[0].setAttribute('style','display:none');
        }
        if($('.ft')[0]){
            $('.ft')[0].setAttribute('style','display:none');
        }
        if($('#ft')[0]){
            $('#ft')[0].setAttribute('style','display:none');
        }
        //使主要内容居中
        if($('#doc-main')[0]){
            $('#doc-main')[0].setAttribute('style','margin-left:116px');
        }
        if($('.reader-tools-bar-center')[0]){
            $('.reader-tools-bar-center')[0].setAttribute('style','margin-right:0px');
        }
        var t = null
        $('.ez-btn').hover(
            function () {
                $('.ez-panel')
                    .css({
                    top: $('.ez-btn').offset().top - 120 + 'px',
                    left: $('.ez-btn').offset().left + 70 + 'px'
                })
                    .show()
            },
            function () {
                //链接上经过，保持5秒
                $('a').mouseover(
                    function(){
                        if (t) window.clearTimeout(t)
                        t = window.setTimeout(function () {
                            $('.ez-panel').hide()
                        },5*1000)
                    }
                )
                //移出panel
                $('.ez-panel').mouseout(function(){
                    if (t) window.clearTimeout(t)
                    t = window.setTimeout(function () {
                        $('.ez-panel').hide()
                    },500)
                })
                //其余情况
                if (t) window.clearTimeout(t)
                t = window.setTimeout(function () {
                    $('.ez-panel').hide()
                },1000)

            }
        )
        $('.ez-btn').click(function () {
            //判断网址是share再打印，否则跳转到share
            if(window.location.pathname.indexOf('share')== -1){
                window.open('/share/' + window.location.pathname.slice(6),'_blank');//新标签页打开链接，不然window.onload不起作用
            }else{
                if($('.tools-bar-small')[0]){
                    $('.tools-bar-small')[0].setAttribute('style','display:none');//点击后隐藏下边栏，防止打印进去
                }
                prePrint()
            }})
        $('body').mousedown(function (e) {
            if (e.button == 2) {
                //imgHandle()
            }
            return true
        })
    }
    //储存恢复，main
    var a = [];
    var b = [];
    var kong = [];
    function saveRecover(){
        b = $('[data-render="1"]');
        for(var i = 0;i<b.length;i++){
            if (a.indexOf(b[i].innerHTML) == -1){
                a.push(b[i].innerHTML);
                console.log(a)
            }
        }
    }

    //main function
    function prePrint() {
        $('.ez-panel').remove()
        $('#bottom-download').remove();
        // add by eko.zhan at 2019-12-14 17:35
        //遍历css文件，将main的样式取消
        $('head')
            .find('link')
            .each((index, item) => {
            if (
                $(item)
                .attr('href')
                .indexOf('/common_toc/common/style/main') != -1
            ) {
                $(item).remove()
            }
        })


        $('.read-all').click()
        $('.header-wrapper').remove()
        $('.no-full-screen').remove()
        $('.lazy-load').remove()
        $('.reader-topbar').remove()
        //使打印出来页面居中
        $('.main')[0].setAttribute('style','margin-left:-70px')

        //重新定义remove方法
        jQuery.fn.extend({
            remove: function () {
                return false
            }
        })
        $(window).scrollTop(0);
        window.setTimeout(function () {
            saveRecover();
        }, 1000)

        var _h = document.body.scrollHeight,
            _tmp = 700
        var _t = window.setInterval(function () {
            $(window).scrollTop(_tmp)
            saveRecover();
            _tmp = _tmp + 700
            _h = document.body.scrollHeight
            if (_tmp > _h) {
                window.clearInterval(_t)
                window.setTimeout(function () {
                    saveRecover();
                    kong = $("[data-render='']");
                    for (var i = 0; i < kong.length; i++) {
                        kong[i].innerHTML = a[i]
                    }
                    console.log(kong);
                    doPrint();
                }, 1000)
            }
        }, 300)
        }

    /**
   * 图片处理，将 div background img 处理成 img 标签，利用 img clip:rect style 来处理图片
   * 暂时未找到 img clip:rect 的规律
   * //FIXME
   */
    function imgHandle() {
        $('div.reader-pic-item').each(function (i, item) {
            var _style = $(item)[0].style
            var _imgUrl = _style.backgroundImage.substring(
                5,
                _style.backgroundImage.length - 2
            )

            var imgPanel = '<img src="' + _imgUrl + '"/>'
            $(item)[0].style.backgroundImage = null

            var p = document.createElement('p')
            $($(item)[0].attributes).each(function (i, attr) {
                $(p).attr(attr.nodeName, attr.nodeValue)
            })
            $(p).append(imgPanel)
            $(item)
                .parent()
                .html(p)
        })
    }
    /**
   * 调用浏览器打印
   */
    function doPrint() {
        imgHandle()
        window.setTimeout(function () {
            window.print()
        }, 3000)
    }
})()