计算中南大学总学分、加权平均分和GPA
// ==UserScript==
// @name CSU GPA Conversion
// @namespace http://tampermonkey.net/
// @version 1.0.0
// @description 计算中南大学总学分、加权平均分和GPA
// @author LMMIKE
// @match *://csujwc.its.csu.edu.cn/jsxsd/kscj/cjcx_list
// @license MIT Apache 2.0
// @grant none
// ==/UserScript==
(function() {
'use strict';
// 等级成绩转换为百分制
function convertLevelToScore(score) {
if (typeof score === 'string') {
switch(score.trim()) {
case '优': return 95;
case '良': return 85;
case '中': return 75;
case '及格': return 65;
case '不及格': return 0;
default: {
const num = parseFloat(score);
return isNaN(num) ? 0 : num;
}
}
}
return 0;
}
// 百分制转GPA (4.0制)
function convertToGPA(score) {
if (score >= 90) return 4.0;
if (score >= 85) return 3.7;
if (score >= 82) return 3.3;
if (score >= 78) return 3.0;
if (score >= 75) return 2.7;
if (score >= 72) return 2.3;
if (score >= 68) return 2.0;
if (score >= 64) return 1.5;
if (score >= 60) return 1.0;
return 0.0;
}
// 创建悬浮窗
function createFloatingWindow() {
const floatDiv = document.createElement('div');
floatDiv.style.cssText = `
position: fixed;
top: 20px;
right: 20px;
background: white;
border: 1px solid #ccc;
padding: 15px;
border-radius: 5px;
box-shadow: 0 2px 10px rgba(0,0,0,0.1);
z-index: 9999;
min-width: 200px;
`;
return floatDiv;
}
// 计算成绩
function calculateGrades() {
let totalCredit = 0;
let weightedScore = 0;
let weightedGPA = 0;
// 获取成绩表格
const table = document.getElementById('dataList');
if (!table) return null;
// 遍历所有成绩行
const rows = table.getElementsByTagName('tr');
for (let i = 1; i < rows.length; i += 2) { // 跳过标题行和详情行
const row = rows[i];
const cells = row.getElementsByTagName('td');
if (cells.length >= 7) {
// 获取成绩和学分
const scoreText = cells[5].textContent.trim();
const creditText = cells[6].textContent.trim();
const score = convertLevelToScore(scoreText);
const credit = parseFloat(creditText);
if (!isNaN(credit) && !isNaN(score)) {
totalCredit += credit;
weightedScore += score * credit;
weightedGPA += convertToGPA(score) * credit;
}
}
}
return {
totalCredit: totalCredit,
averageScore: weightedScore / totalCredit,
GPA: weightedGPA / totalCredit
};
}
// 主函数
function main() {
const results = calculateGrades();
if (!results) return;
const floatDiv = createFloatingWindow();
floatDiv.innerHTML = `
<h3 style="margin:0 0 10px 0;color:#333;">成绩统计</h3>
<div style="line-height:1.5;">
<p style="margin:5px 0;">总学分：${results.totalCredit.toFixed(2)}</p>
<p style="margin:5px 0;">加权平均分：${results.averageScore.toFixed(2)}</p>
<p style="margin:5px 0;">GPA：${results.GPA.toFixed(2)}</p>
</div>
`;
document.body.appendChild(floatDiv);
// 添加拖动功能
let isDragging = false;
let currentX;
let currentY;
let initialX;
let initialY;
let xOffset = 0;
let yOffset = 0;
floatDiv.addEventListener('mousedown', dragStart);
document.addEventListener('mousemove', drag);
document.addEventListener('mouseup', dragEnd);
function dragStart(e) {
initialX = e.clientX - xOffset;
initialY = e.clientY - yOffset;
if (e.target === floatDiv) {
isDragging = true;
}
}
function drag(e) {
if (isDragging) {
e.preventDefault();
currentX = e.clientX - initialX;
currentY = e.clientY - initialY;
xOffset = currentX;
yOffset = currentY;
floatDiv.style.transform = `translate(${currentX}px, ${currentY}px)`;
}
}
function dragEnd() {
initialX = currentX;
initialY = currentY;
isDragging = false;
}
}
// 页面加载完成后执行
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', main);
} else {
main();
}
})();