计算加权绩点并显示在页面上的油猴脚本
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// ==UserScript==
// @name 东北大学绩点小助手
// @license MIT
// @namespace http://tampermonkey.net/
// @version 1.2
// @description 计算加权绩点并显示在页面上的油猴脚本
// @author FFSNOW
// @match http://219.216.96.4/*
// @match https://webvpn.neu.edu.cn/*
// @match https://portal.neu.edu.cn/*
// @match https://eone.neu.edu.cn/*
// @grant GM_getValue
// @grant GM_setValue
// ==/UserScript==
(function () {
'use strict';
// 创建按钮
let button = document.createElement('button');
button.innerHTML = '绩点助手';
// 设置按钮样式
button.style.position = 'fixed';
button.style.bottom = '20px';
button.style.right = '20px';
button.style.zIndex = '9999';
button.style.backgroundColor = 'rgba(16, 55, 112, 0.7)';
button.style.color = 'white';
button.style.border = 'none';
button.style.borderRadius = '50%';
button.style.width = '55px'; // 按钮宽度与高度相等
button.style.height = '55px'; // 按钮宽度与高度相等
button.style.padding = '12px';
button.style.fontSize = '10px';
button.style.cursor = 'move';
button.style.boxShadow = '0 0 5px rgba(0,0,0,0.3)';
// 按钮拖动函数
function dragElement(element) {
let pos1 = 0, pos2 = 0, pos3 = 0, pos4 = 0;
element.onmousedown = dragMouseDown;
function dragMouseDown(e) {
e = e || window.event;
e.preventDefault();
pos3 = e.clientX;
pos4 = e.clientY;
document.onmouseup = closeDragElement;
document.onmousemove = elementDrag;
}
function elementDrag(e) {
e = e || window.event;
e.preventDefault();
pos1 = pos3 - e.clientX;
pos2 = pos4 - e.clientY;
pos3 = e.clientX;
pos4 = e.clientY;
element.style.top = (element.offsetTop - pos2) + "px";
element.style.left = (element.offsetLeft - pos1) + "px";
}
function closeDragElement() {
document.onmouseup = null;
document.onmousemove = null;
}
}
// 按钮点击事件处理函数
function buttonClickHandler() {
let domain = window.location.hostname;
if (domain === 'webvpn.neu.edu.cn') {
window.open('https://webvpn.neu.edu.cn/http/62304135386136393339346365373340e2b0fd71d8941093ab4e2527/eams/teach/grade/course/person!historyCourseGrade.action?projectType=MAJOR');
} else {
window.open('http://219.216.96.4/eams/teach/grade/course/person!historyCourseGrade.action?projectType=MAJOR');
}
}
// 右键菜单事件处理函数
function buttonContextMenuHandler(event) {
event.preventDefault();
button.remove();
floatingWindow.style.display = 'none';
}
// 创建悬浮窗
let floatingWindow = document.createElement('div');
floatingWindow.innerHTML = '点击进入，右键关闭，本插件作用为绩点计算，你可以输入新的一门课的学分和绩点预测绩点变化，你也可以进入绩点模拟功能随意修改绩点，进一步分析';
floatingWindow.style.position = 'fixed';
floatingWindow.style.backgroundColor = 'white';
floatingWindow.style.color = 'black';
floatingWindow.style.padding = '10px';
floatingWindow.style.border = '1px solid black';
floatingWindow.style.borderRadius = '5px';
floatingWindow.style.bottom = '20px';
floatingWindow.style.right = '80px';
floatingWindow.style.display = 'none';
// 将悬浮窗添加到页面上
document.body.appendChild(floatingWindow);
// 在按钮上绑定鼠标移入事件，显示悬浮窗口
button.addEventListener('mouseover', function () {
floatingWindow.style.display = 'block';
});
// 在按钮上绑定鼠标移出事件，隐藏悬浮窗口
button.addEventListener('mouseout', function () {
floatingWindow.style.display = 'none';
});
// 将按钮添加到页面上
document.body.appendChild(button);
// 将按钮设为可拖动
dragElement(button);
// 绑定按钮点击事件
button.addEventListener('click', buttonClickHandler);
// 绑定右键菜单事件
button.addEventListener('contextmenu', buttonContextMenuHandler);
//初始化筛选器
function addFilter() {
// 获取表格
var table = document.querySelector('.gridtable');
if (!table) {
return;
}
// 创建筛选器输入框
var input = document.createElement('input');
input.type = 'text';
input.placeholder = '筛选学年学期';
input.style.backgroundColor = 'white'; // 背景颜色
input.style.border = '1px solid lightgray'; // 边框样式
input.style.padding = '10px'; // 内边距
input.addEventListener('input', function () {
var filterValue = input.value.toLowerCase();
var rows = table.querySelectorAll('tbody tr');
// 遍历表格中的每一行，根据输入框的值进行筛选
rows.forEach(function (row) {
var cell = row.querySelector('td:first-child');
var value = cell.textContent.toLowerCase();
// 根据筛选值隐藏或显示行
if (value.indexOf(filterValue) === -1) {
row.style.display = 'none';
} else {
row.style.display = '';
}
});
});
return input;
}
// 插入筛选器输入框
var tableHead = document.querySelector('.gridhead');
var newRow = tableHead.insertRow(0);
newRow.insertCell().appendChild(addFilter());
//新科目绩点影响
var creditInput = document.createElement('input');
creditInput.type = 'text';
creditInput.placeholder = '新课学分';
creditInput.style.backgroundColor = 'white'; // 背景颜色
creditInput.style.border = '1px solid lightgray'; // 边框样式
creditInput.style.padding = '10px'; // 内边距
newRow.insertCell().appendChild(creditInput);
var gradeInput = document.createElement('input');
gradeInput.type = 'text';
gradeInput.placeholder = '预估绩点';
gradeInput.style.backgroundColor = 'white';
gradeInput.style.border = '1px solid lightgray';
gradeInput.style.padding = '10px';
newRow.insertCell().appendChild(gradeInput);
var calculateButton = document.createElement('button');
calculateButton.textContent = '筛选/预测计算';
calculateButton.style.backgroundColor = 'white'; // 背景颜色
calculateButton.style.color = 'black'; // 文字颜色
calculateButton.style.width = '100%'; // 宽度设置为全宽
calculateButton.style.padding = '10px'; // 内边距
calculateButton.style.border = 'none'; // 去除边框
calculateButton.style.cursor = 'pointer'; // 鼠标指针样式
// 添加悬停样式
calculateButton.addEventListener('mouseenter', function () {
calculateButton.style.backgroundColor = 'lightgray';
});
calculateButton.addEventListener('mouseleave', function () {
calculateButton.style.backgroundColor = 'white';
});
newRow.insertCell().appendChild(calculateButton);
var resultCell = newRow.insertCell();
resultCell.colSpan = 8;
var editButton = document.createElement('button');
editButton.textContent = '绩点模拟';
editButton.style.backgroundColor = 'white'; // 背景颜色
editButton.style.color = 'black'; // 文字颜色
editButton.style.width = '100%'; // 宽度设置为全宽
editButton.style.padding = '10px'; // 内边距
editButton.style.border = 'none'; // 去除边框
editButton.style.cursor = 'pointer'; // 鼠标指针样式
// 添加悬停样式
editButton.addEventListener('mouseenter', function () {
editButton.style.backgroundColor = 'lightgray';
});
editButton.addEventListener('mouseleave', function () {
editButton.style.backgroundColor = 'white';
});
newRow.insertCell().appendChild(editButton);
var huanxiangbutten = document.createElement('button');
huanxiangbutten.textContent = '绩点模拟计算';
huanxiangbutten.style.backgroundColor = 'white'; // 背景颜色
huanxiangbutten.style.color = 'black'; // 文字颜色
huanxiangbutten.style.width = '100%'; // 宽度设置为全宽
huanxiangbutten.style.padding = '10px'; // 内边距
huanxiangbutten.style.border = 'none'; // 去除边框
huanxiangbutten.style.cursor = 'pointer'; // 鼠标指针样式
// 添加悬停样式
huanxiangbutten.addEventListener('mouseenter', function () {
huanxiangbutten.style.backgroundColor = 'lightgray';
});
huanxiangbutten.addEventListener('mouseleave', function () {
huanxiangbutten.style.backgroundColor = 'white';
});
newRow.insertCell().appendChild(huanxiangbutten);
// 显示绩点
var oldGPA = GM_getValue('GPA');
//alert(oldGPA);
var trueGPA = calculateWeightedGPA().toFixed(4);
// 判断绩点是否发生变化
if (oldGPA !== trueGPA) {
alert('你的绩点从' + oldGPA +'变为了' + trueGPA);
}
GM_setValue('GPA', trueGPA);
// 计算加权绩点的函数
function calculateWeightedGPA(credit_index = 6, grade_index = 12) {
var table = document.querySelector('.gridtable');
var tableBody = table.querySelector('tbody');
var rows = tableBody.getElementsByTagName('tr');
var totalCredit = 0;
var totalGrade = 0;
// 获取表头单元格
var tableHead = document.querySelector('.gridhead tr').nextElementSibling;
var cells = tableHead.querySelectorAll('th');
// 遍历表头中的每个单元格，查找"绩点"和"学分"所在的列数
cells.forEach(function (cell, index) {
var cellText = cell.textContent.trim();
if (cellText === "绩点") {
grade_index = index;
}
if (cellText === "学分") {
credit_index = index;
}
});
for (var i = 0; i < rows.length; i++) {
var row = rows[i];
var credit = parseFloat(row.cells[credit_index].textContent);
var grade = parseFloat(row.cells[grade_index].textContent);
if (isNaN(credit) || isNaN(grade)) {
continue; // 跳过数据不是数字的行
}
if (row.style.display === 'none') {
continue; // 跳过被隐藏的行
}
totalCredit += credit;
totalGrade += credit * grade;
}
var inputCredit = parseFloat(creditInput.value);
var inputGrade = parseFloat(gradeInput.value);
var newTotalCredit = totalCredit + inputCredit;
var newTotalGrade = totalGrade + inputCredit * inputGrade;
var newGPA = newTotalGrade / newTotalCredit;
var currentGPA = totalGrade / totalCredit;
var gradeChange = newGPA - currentGPA;
// 显示加权绩点
resultCell.innerHTML = '当前加权绩点：' + currentGPA.toFixed(4) +
'， 加上这门课绩点：' + newGPA.toFixed(4) +
'， 绩点变化：' + gradeChange.toFixed(4);
if (isNaN(newGPA) || isNaN(gradeChange)) {
resultCell.innerHTML = '当前加权绩点：' + currentGPA.toFixed(4) +
'， 当前总学分：' + totalCredit.toFixed(1)
}
return currentGPA;
}
// 监听计算按钮的点击事件
calculateButton.addEventListener('click', function () {
calculateWeightedGPA();
});
editButton.addEventListener('click', function () {
if (document.designMode == 'off') {
document.designMode = 'on'
editButton.textContent = '结束幻想'
// 显示绩点
resultCell.innerHTML = '当前加权绩点：' + trueGPA;
var table = document.querySelector('.gridtable');
var tableBody = table.querySelector('tbody');
// 获取表头单元格
var tableHead = document.querySelector('.gridhead tr').nextElementSibling;
var cells = tableHead.querySelectorAll('th');
// 查找"考试情况"所在的列数
var last_index = -1;
cells.forEach(function (cell, index) {
var cellText = cell.textContent.trim();
if (cellText === "考试情况") {
last_index = index;
}
});
// 插入行
for (var i = 0; i < 15; i++) {
var row = tableBody.insertRow();
row.classList.add('griddata-odd');
for (var j = 0; j < last_index + 1; j++) {
var celll = row.insertCell();
if (j === 3) {
celll.textContent = '幻想课程';
} else {
celll.textContent = ' ';
}
}
}
}
else {
document.designMode = 'off'
editButton.textContent = '模拟计算'
location.reload();
};
});
// 监听幻想按钮的点击事件
huanxiangbutten.addEventListener('click', function () {
// 显示绩点
var dreamGPA = calculateWeightedGPA();
resultCell.innerHTML = '真实加权绩点：' + trueGPA + '，幻想绩点：' + dreamGPA.toFixed(4) + '，想象力：' + (dreamGPA - trueGPA).toFixed(4);
});
})();