// ==UserScript==
// @name 知网检索增强
// @name:zh-CN 知网检索增强
// @name:en CNKI Search Enhancer
// @version 0.2.2
// @namespace https://greasyfork.org/users/808185
// @description 新标签页打开高级检索、高级检索自动生成专业检索式……
// @description:en The new tab opens advanced retrieval and automatically generates retrieval.
// @icon https://www.cnki.net/favicon.ico
// @author shujuecn
// @match *://*/kns8s/AdvSearch*
// @grant none
// @license GPL3
// ==/UserScript==
(function () {
'use strict';
const styles = `
.custom-menu-list {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
display: inline-block;
width: 460px;
margin-top: -24px;
}
.custom-tab {
float: right;
height: 43px;
padding: 0 20px;
font-size: 15px;
line-height: 43px;
color: #2b2b2b;
cursor: pointer;
}
.custom-tab:hover {
color: red;
}
`;
const styleSheet = document.createElement('style');
styleSheet.innerText = styles;
document.head.appendChild(styleSheet);
const tabs = [
{
text: '新标签页检索',
action: () => {
const currentUrl = new URL(window.location.href);
let newUrl;
if (currentUrl.hostname.includes('kns.cnki.net')) {
newUrl = new URL(`${currentUrl.protocol}//${currentUrl.hostname}/kns8s/AdvSearch`);
}
if (newUrl) {
window.open(newUrl.href, '_blank');
}
}
},
{
text: '复制为检索式',
action: () => {
const tabElement = event.currentTarget;
const originalText = tabElement.textContent;
const fieldList = document.querySelector("#ModuleSearch > div.search-box > div > div.search-classify > div > div.grade-search-content > div.search-mainbox.is-off > div.search-middle > div:nth-child(1) > div.gradeSearch");
if (fieldList) {
const ddElements = fieldList.querySelectorAll('dd');
const fieldCount = ddElements.length;
const ddIndices = Array.from({ length: fieldCount }, (_, i) => i * 2 + 2);
const fieldNames = [];
const fieldValues = [];
const fieldOptions = [];
const logicalOperators = [];
ddIndices.forEach((index) => {
const nameElement = fieldList.querySelector(`#gradetxt > dd:nth-child(${index}) > div.input-box > div.sort.reopt > div.sort-default > span`);
const valueElement = fieldList.querySelector(`#gradetxt > dd:nth-child(${index}) > div.input-box > input[type=text]`);
const optionElement = fieldList.querySelector(`#gradetxt > dd:nth-child(${index}) > div.input-box > div.sort.special > div > span`);
if (nameElement && valueElement && optionElement) {
fieldNames.push(nameElement.textContent);
fieldValues.push(valueElement.value);
fieldOptions.push(optionElement.textContent);
}
});
const operatorIndices = ddIndices.slice(1);
operatorIndices.forEach((index) => {
const operatorElement = fieldList.querySelector(`#gradetxt > dd:nth-child(${index}) > div.sort.logical > div > span`);
if (operatorElement) {
logicalOperators.push(operatorElement.textContent);
}
});
// 1. 替换字段名称中的中文
const fieldNameReplacements = {
'主题': 'SU %= ', '篇关摘': 'TKA %= ', '关键词': 'KY = ', '篇名': 'TI %= ', '全文': 'FT %= ',
'作者': 'AU = ', '第一作者': 'FI = ', '通讯作者': 'RP = ', '作者单位': 'AF = ', '基金': 'FU = ',
'摘要': 'AB %= ', '小标题': 'CO %= ', '参考文献': 'RF %= ', '分类号': 'CLC = ', '文献来源': 'LY %= ',
'DOI': 'DOI = ', '被引频次': 'CF = ',
'题名': 'TI %= ', '导师': 'TU = ', '第一导师': 'FTU = ', '学位授予单位': 'LY %= ',
'目录': 'CO %= ', '中图分类号': 'CLC = ', '学科专业名称': 'XF = ', '发表时间': 'PT = '
};
// 2. 构造检索键值表
const searchKeyValues = [];
const specialChars = /[*+\-]/; // 定义特殊字符
fieldValues.forEach((value, index) => {
if (value) {
const words = value.split(' '); // 按空格分词
const quotedWords = words.map((word, idx) => {
if (specialChars.test(word)) { // 如果是特殊字符,直接返回
return word;
} else if (/^['"].*['"]$/.test(word)) { // 如果已被引号包裹,直接返回
return word;
} else if (/^\(.*\)$/.test(word)) { // 如果被小括号包裹
const subWords = word.slice(1, -1).split('+');
const quotedSubWords = subWords.map(subWord => {
if (specialChars.test(subWord)) {
return subWord;
} else if (/^['"].*['"]$/.test(subWord)) {
return subWord;
} else {
return `'${subWord}'`;
}
});
return `(${quotedSubWords.join(' + ')})`;
} else { // 否则在两侧添加单引号,但首位元素如果开头字符为(或末尾元素如果结尾字符为)则处理括号和文字
if (word[0] === '(') { // 首位元素以 ( 开头
const bracketContent = word.slice(1);
const quotedContent = /^['"].*['"]$/.test(bracketContent) ? bracketContent : `'${bracketContent}'`;
return `(${quotedContent}`;
} else if (word[word.length - 1] === ')') { // 末位元素以 ) 结尾
const bracketContent = word.slice(0, -1);
const quotedContent = /^['"].*['"]$/.test(bracketContent) ? bracketContent : `'${bracketContent}'`;
return `${quotedContent})`;
} else {
return `'${word}'`;
}
}
});
const quotedValue = quotedWords.join(' '); // 用空格连接子元素
const replacedName = fieldNameReplacements[fieldNames[index]] || fieldNames[index];
searchKeyValues.push(`${replacedName}${quotedValue}`);
}
});
// 3. 插入逻辑运算符
const searchQuery = searchKeyValues.reduce((acc, curr, index) => {
if (index < searchKeyValues.length - 1) {
return `${acc}${curr} ${logicalOperators[index]} `;
} else {
return `${acc}${curr}`;
}
}, '');
// console.log('字段名称:', fieldNames);
// console.log('字段值:', fieldValues);
// console.log('字段选项:', fieldOptions);
// console.log('逻辑运算符:', logicalOperators);
// console.log('检索键值表:', searchKeyValues);
// console.log('搜索查询字符串:', searchQuery);
// 4. 复制到剪切板
if (navigator.clipboard) {
navigator.clipboard.writeText(searchQuery)
.then(() => {
console.log('已复制搜索查询字符串到剪切板');
tabElement.textContent = '复制成功！';
// 鼠标脱离时恢复原始文本
const handleMouseLeave = () => {
tabElement.textContent = originalText;
tabElement.removeEventListener('mouseleave', handleMouseLeave);
};
tabElement.addEventListener('mouseleave', handleMouseLeave, { once: true });
})
.catch((err) => {
console.error('复制到剪切板时出错:', err);
// 使用备用方案进行复制
copyTextToClipboard(searchQuery, tabElement, originalText);
});
} else {
// 浏览器不支持 Clipboard API,直接使用备用方案进行复制
copyTextToClipboard(searchQuery, tabElement, originalText);
}
} else {
console.log('未找到检索字段列表元素');
}
}
}
];
// 备用方案: 创建临时文本区域
function copyTextToClipboard(text, tabElement, originalText) {
const textArea = document.createElement('textarea');
textArea.value = text;
document.body.appendChild(textArea);
textArea.select();
try {
const successful = document.execCommand('copy');
if (successful) {
console.log('已复制搜索查询字符串到剪切板');
tabElement.textContent = '复制成功！';
// 鼠标脱离时恢复原始文本
const handleMouseLeave = () => {
tabElement.textContent = originalText;
tabElement.removeEventListener('mouseleave', handleMouseLeave);
};
tabElement.addEventListener('mouseleave', handleMouseLeave, { once: true });
} else {
console.error('无法复制到剪切板');
}
} catch (err) {
console.error('无法访问剪贴板:', err);
}
document.body.removeChild(textArea);
}
window.addEventListener('load', function () {
const menuList = document.querySelector('.search-classify-menu');
const customMenuList = document.createElement('ul');
customMenuList.className = 'custom-menu-list';
// 去除知网logo
const elementToReplace = document.querySelector("#ModuleSearch > div.search-box > div > div.search-left > div");
if (elementToReplace) {
const placeholderDiv = document.createElement('div');
placeholderDiv.style.width = elementToReplace.offsetWidth + 'px';
placeholderDiv.style.height = elementToReplace.offsetHeight + 'px';
elementToReplace.parentNode.replaceChild(placeholderDiv, elementToReplace);
}
tabs.forEach(tab => {
const newTab = document.createElement('li');
newTab.className = 'custom-tab';
newTab.textContent = tab.text;
newTab.addEventListener('click', tab.action);
customMenuList.appendChild(newTab);
});
menuList.parentNode.insertBefore(customMenuList, menuList.nextSibling);
});
})();
