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点击按钮弹出模态框选择下载PDF/课件/视频。按D键快速下载全部PDF。修复多选下载。
// ==UserScript==
// @name 超星学习通资源下载
// @namespace http://tampermonkey.net/
// @version 1.15
// @description 点击按钮弹出模态框选择下载PDF/课件/视频。按D键快速下载全部PDF。修复多选下载。
// @author 西电网信院的废物rytter & 西电网信院的废物B4a
// @match *://*/*mycourse/studentstudy*
// @match *://*/*nodedetailcontroller/*
// @match *://*/*mycourse/teacherstudy*
// @icon data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @grant GM_addStyle
// @grant GM_getValue
// @grant GM_setValue
// @license MIT
// ==/UserScript==
(function () {
"use strict";
// --- Styles ---
// (GM_addStyle remains the same as v1.21)
GM_addStyle(`
.cx-download-tips {
position: fixed;
top: 15px;
right: 15px;
background-color: rgba(230, 247, 255, 0.97);
padding: 12px 18px;
z-index: 10001;
text-align: left; /* Align text left for better readability */
border-radius: 8px;
font-size: 13px;
color: #333;
border: 1px solid #b3e0ff;
box-shadow: 0 4px 12px rgba(0, 123, 255, 0.2);
max-width: 400px; /* Limit width */
opacity: 1;
transition: opacity 0.5s ease-out, transform 0.3s ease-out;
transform: translateX(0);
}
.cx-download-tips.cx-hidden {
opacity: 0;
transform: translateX(20px); /* Slide out effect */
pointer-events: none;
}
.cx-download-tips i { /* General message styling */
font-style: normal;
display: block;
}
.cx-download-tips .progress-container {
margin-top: 8px;
}
.cx-download-tips .progress-info {
display: flex;
justify-content: space-between;
align-items: center;
margin-bottom: 4px;
font-size: 12px;
}
.cx-download-tips .progress-filename {
font-weight: bold;
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
max-width: 250px; /* Limit filename width */
display: inline-block;
}
.cx-download-tips .progress-size {
color: #555;
font-size: 11px;
}
.cx-download-tips progress {
width: 100%;
height: 8px;
border-radius: 4px;
overflow: hidden; /* Ensure rounded corners apply to value */
}
.cx-download-tips progress::-webkit-progress-bar {
background-color: #e0e0e0;
border-radius: 4px;
}
.cx-download-tips progress::-webkit-progress-value {
background-color: #4CAF50; /* Green progress */
border-radius: 4px;
transition: width 0.1s linear;
}
.cx-download-tips progress::-moz-progress-bar { /* Firefox */
background-color: #4CAF50;
border-radius: 4px;
transition: width 0.1s linear;
}
.cx-download-tips .status-icon {
margin-right: 5px;
font-weight: bold;
}
.cx-download-tips .status-success { color: #28a745; } /* Green */
.cx-download-tips .status-error { color: #dc3545; } /* Red */
/* Modal Styles */
.cx-modal-overlay {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: rgba(0, 0, 0, 0.6);
z-index: 10010;
display: flex;
justify-content: center;
align-items: center;
}
.cx-modal-content {
background-color: white;
padding: 25px;
border-radius: 10px;
box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
width: 90%;
max-width: 600px;
max-height: 80vh;
display: flex;
flex-direction: column;
}
.cx-modal-title {
font-size: 18px;
font-weight: bold;
margin-bottom: 15px;
color: #333;
border-bottom: 1px solid #eee;
padding-bottom: 10px;
}
.cx-modal-list {
overflow-y: auto;
margin-bottom: 20px;
flex-grow: 1; /* Allow list to take available space */
}
.cx-modal-list ul {
list-style: none;
padding: 0;
margin: 0;
}
.cx-modal-list li {
padding: 10px 8px; /* Slightly more padding */
border-bottom: 1px solid #f0f0f0;
display: flex;
align-items: center;
cursor: pointer; /* Make list item clickable */
transition: background-color 0.15s ease;
}
.cx-modal-list li:hover {
background-color: #f8f9fa;
}
.cx-modal-list li:last-child {
border-bottom: none;
}
.cx-modal-list input[type="checkbox"] {
margin-right: 12px;
width: 16px;
height: 16px;
flex-shrink: 0; /* Prevent checkbox from shrinking */
pointer-events: none; /* Let the LI handle the click */
}
.cx-modal-list label {
font-size: 14px;
color: #555;
flex-grow: 1; /* Allow label to take space */
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
/* Remove cursor pointer from label, LI handles it */
/* cursor: pointer; */
}
.cx-modal-list .file-type {
font-size: 11px;
color: #888;
margin-left: 10px;
background-color: #eee;
padding: 2px 5px;
border-radius: 3px;
white-space: nowrap; /* Prevent type from wrapping */
flex-shrink: 0; /* Prevent type from shrinking */
}
.cx-modal-list .file-error {
font-size: 11px;
color: #dc3545;
margin-left: 10px;
font-style: italic;
}
.cx-modal-actions {
text-align: right;
margin-top: 10px; /* Add space above buttons */
}
.cx-modal-button {
padding: 8px 16px;
margin-left: 10px;
border: none;
border-radius: 6px;
cursor: pointer;
font-size: 14px;
transition: background-color 0.2s ease, box-shadow 0.2s ease;
}
.cx-modal-button-primary {
background-color: #007bff;
color: white;
box-shadow: 0 2px 4px rgba(0, 123, 255, 0.3);
}
.cx-modal-button-primary:hover {
background-color: #0056b3;
box-shadow: 0 3px 6px rgba(0, 123, 255, 0.4);
}
.cx-modal-button-secondary {
background-color: #6c757d;
color: white;
box-shadow: 0 2px 4px rgba(108, 117, 125, 0.3);
}
.cx-modal-button-secondary:hover {
background-color: #5a6268;
box-shadow: 0 3px 6px rgba(108, 117, 125, 0.4);
}
/* Button Styles */
.cx-action-button {
margin: 6px 0;
padding: 8px 10px;
border: none;
border-radius: 8px;
cursor: pointer;
font-size: 12px;
font-weight: bold;
width: 85px;
text-align: center;
box-shadow: 0 3px 6px rgba(0,0,0,0.15);
transition: background-color 0.2s ease, transform 0.1s ease, box-shadow 0.2s ease;
color: white;
}
.cx-action-button:hover {
opacity: 0.9;
box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}
.cx-action-button:active {
transform: scale(0.97);
box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
`);
// --- Globals ---
let tipsDiv = null;
let tipTimeout = null;
let modalInstance = null;
// --- Helper Functions ---
// get_objectids, getTipsDiv, showTip, hideTipsDiv, cleanFilename, fetchResourceDetails, delay
// (Keep these functions as they were in v1.21)
function get_objectids() {
// ... (keep the existing get_objectids function as is) ...
let objectids = [];
let ans_classes = document.getElementsByClassName("ans-attach-ct");
// support old version used by learning.xidian.edu.cn
if (ans_classes.length === 0) {
ans_classes = document.getElementsByClassName("ans-cc");
}
if (ans_classes.length > 0) {
// console.log("模式1: 找到资源容器数量：", ans_classes.length);
for (let j = 0; j < ans_classes.length; j++) {
const iframe = ans_classes[j].getElementsByTagName("iframe")[0];
if (iframe && iframe.getAttribute("objectid") != undefined) {
objectids.push(iframe.getAttribute("objectid"));
}
}
} else {
// Try finding objectid in the main iframe content (common case)
const mainIframe = document.getElementsByTagName("iframe")[0];
if (mainIframe && mainIframe.contentDocument) {
try {
ans_classes = mainIframe.contentDocument.body.getElementsByClassName("ans-attach-ct");
if (ans_classes.length === 0) {
ans_classes = mainIframe.contentDocument.body.getElementsByClassName("ans-cc");
}
// console.log("模式2: Iframe内找到资源容器数量：", ans_classes.length);
for (let j = 0; j < ans_classes.length; j++) {
const iframe = ans_classes[j].getElementsByTagName("iframe")[0];
if (iframe && iframe.getAttribute("objectid") != undefined) {
objectids.push(iframe.getAttribute("objectid"));
}
}
} catch(e) {
console.warn("访问iframe内容时出错 (可能是跨域限制):", e);
if (mainIframe.getAttribute("objectid") != undefined) {
objectids.push(mainIframe.getAttribute("objectid"));
// console.log("模式3: 直接在主iframe上找到objectid");
}
}
}
}
// Remove duplicates
objectids = [...new Set(objectids)];
console.log("找到的所有任务对象IDs:", objectids);
return objectids;
}
function getTipsDiv() {
if (!tipsDiv) {
tipsDiv = document.createElement('div');
tipsDiv.className = 'cx-download-tips cx-hidden'; // Start hidden
document.body.appendChild(tipsDiv);
}
return tipsDiv;
}
function showTip(message, duration = 3000, isError = false, isSuccess = false) {
const div = getTipsDiv();
clearTimeout(tipTimeout); // Clear any existing hide timeout
let icon = '';
if (isSuccess) icon = '<span class="status-icon status-success">✔</span>';
if (isError) icon = '<span class="status-icon status-error">✘</span>';
div.innerHTML = `<i>${icon}${message}</i>`;
div.classList.remove('cx-hidden'); // Make visible
if (duration > 0) {
tipTimeout = setTimeout(hideTipsDiv, duration);
}
}
function hideTipsDiv() {
const div = getTipsDiv();
clearTimeout(tipTimeout);
div.classList.add('cx-hidden');
}
function cleanFilename(filename) {
return filename.replace(/[\/\\?%*:|"<>]/g, '-').replace(/\s+/g, ' ');
}
/**
* Fetches details for a single resource object ID.
* @param {string} objectid
* @returns {Promise<object>} Resource details object
*/
async function fetchResourceDetails(objectid) {
const protocolStr = document.location.protocol;
const domain = window.location.href.includes("xueyinonline") ? "xueyinonline" : "chaoxing";
const url = `${protocolStr}//mooc1.${domain}.com/ananas/status/${objectid}?flag=normal`;
let resource = {
objectid: objectid,
filename: `未知资源_${objectid}`,
downloadUrl: null,
type: '未知',
error: null,
openDirectly: false // Added flag
};
try {
const response = await fetch(url);
if (!response.ok) {
throw new Error(`HTTP ${response.status}`);
}
const json = await response.json();
// console.log("Fetched info for", objectid, json);
let fileUrl = null;
let fileExtension = 'bin';
let filename = json.filename || `资源_${objectid}`;
// Determine type and URL priority
if (json.pdf) {
resource.type = 'PDF';
fileUrl = json.pdf;
fileExtension = 'pdf';
} else if (json.http && (json.filename?.toLowerCase().endsWith('.mp4') || json.http.includes('.mp4') || json.mimetype?.includes('video'))) {
resource.type = '视频';
fileUrl = json.http;
fileExtension = json.filename?.split('.').pop() || 'mp4';
} else if (json.filename?.toLowerCase().includes(".ppt") && json.download) {
resource.type = 'PPT'; // Special PPT case handled differently (opening link)
fileUrl = json.download.startsWith('http') ? json.download : 'https://' + json.download;
fileExtension = json.filename?.split('.').pop() || 'ppt'; // Use original ext
// Mark this as needing direct open, not XHR download
resource.openDirectly = true;
} else if (json.download) {
resource.type = '文件'; // General file
fileUrl = json.download;
fileExtension = json.filename?.split('.').pop() || 'bin';
if (fileExtension.match(/ppt|pptx/i)) resource.type = 'PPT';
else if (fileExtension.match(/doc|docx/i)) resource.type = '文档';
else if (fileExtension.match(/xls|xlsx/i)) resource.type = '表格';
else if (fileExtension.match(/zip|rar|7z/i)) resource.type = '压缩包';
} else if (json.http) {
// Treat other http links as potential downloads, but maybe less reliable
resource.type = '链接/其他';
fileUrl = json.http;
fileExtension = json.filename?.split('.').pop() || 'bin';
}
// Construct final filename
let baseName = filename.replace(/\.[^.]+$/, '');
const prevTitleElement = document.querySelector('.prev_title') || document.querySelector('.tab_highlight');
const prevTitle = prevTitleElement?.textContent?.trim() || document.title.split(/[ \-_]/)[0] || '课程文件';
resource.filename = cleanFilename(`${prevTitle}_${baseName}.${fileExtension}`);
// Ensure protocol for non-direct links
if (fileUrl && !resource.openDirectly && !fileUrl.startsWith('http')) {
fileUrl = protocolStr + fileUrl;
}
resource.downloadUrl = fileUrl;
} catch (error) {
console.error(`获取资源 ${objectid} 信息失败:`, error);
resource.error = `获取失败 (${error.message})`;
}
return resource;
}
function delay(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
// --- Core Download Logic ---
/**
* Downloads a file using XMLHttpRequest. Can show progress or run silently.
* @param {string} fileUrl The URL of the file to download.
* @param {string} fullFileName The desired filename for the download.
* @param {boolean} [showProgress=true] Whether to display detailed progress in the tips div.
*/
function downloadFile(fileUrl, fullFileName, showProgress = true) {
const div = getTipsDiv();
if (showProgress) {
clearTimeout(tipTimeout); // Prevent auto-hide during download
div.innerHTML = ''; // Clear previous content for detailed progress
div.classList.remove('cx-hidden'); // Ensure visible
console.log(`开始下载 (带进度): ${fullFileName} from ${fileUrl}`);
// Create progress UI elements
const container = document.createElement('div');
container.className = 'progress-container';
const infoDiv = document.createElement('div');
infoDiv.className = 'progress-info';
const fileNameSpan = document.createElement('span');
fileNameSpan.className = 'progress-filename';
fileNameSpan.textContent = fullFileName;
fileNameSpan.title = fullFileName;
const fileSizeSpan = document.createElement('span');
fileSizeSpan.className = 'progress-size';
fileSizeSpan.textContent = '(计算中...)';
infoDiv.appendChild(fileNameSpan);
infoDiv.appendChild(fileSizeSpan);
const progressBar = document.createElement('progress');
progressBar.value = 0;
progressBar.max = 100;
container.appendChild(infoDiv);
container.appendChild(progressBar);
div.appendChild(container);
} else {
// For batch downloads, maybe just log or show a brief starting message if needed
console.log(`开始下载 (批量): ${fullFileName} from ${fileUrl}`);
// Optionally: showTip(`正在尝试下载: ${fullFileName}`, 1500); // Very brief message
}
const xhr = new XMLHttpRequest();
xhr.open('GET', fileUrl, true);
xhr.responseType = 'blob';
xhr.onprogress = function (event) {
if (showProgress && event.lengthComputable) {
const percentComplete = (event.loaded / event.total) * 100;
const progressBar = div.querySelector('progress'); // Find progress bar within the tips div
const fileSizeSpan = div.querySelector('.progress-size');
if(progressBar) progressBar.value = percentComplete;
if (fileSizeSpan && fileSizeSpan.textContent === '(计算中...)') {
fileSizeSpan.textContent = `(${(event.total / 1024 / 1024).toFixed(2)} MB)`;
}
} else if (showProgress) {
// Handle indeterminate progress if needed
const progressBar = div.querySelector('progress');
const fileSizeSpan = div.querySelector('.progress-size');
if(progressBar) progressBar.removeAttribute('value');
if(fileSizeSpan) fileSizeSpan.textContent = `(${(event.loaded / 1024 / 1024).toFixed(2)} MB / 未知)`;
}
};
xhr.onload = function (event) {
if (showProgress) {
const progressBar = div.querySelector('progress');
if(progressBar) progressBar.value = 100; // Ensure 100% on success
}
if (this.status === 200) {
let blob = this.response;
let finalFileName = fullFileName;
// Mime type check and correction (especially for PDF)
if (blob.type === 'application/pdf' && !finalFileName.toLowerCase().endsWith('.pdf')) {
console.log(`Blob type is PDF, correcting filename: ${finalFileName}`);
finalFileName = finalFileName.replace(/\.[^.]+$/, '') + '.pdf';
}
// Add more mime type checks if necessary
const downloadUrl = window.URL.createObjectURL(blob);
const a = document.createElement("a");
a.style.display = 'none';
a.href = downloadUrl;
a.download = finalFileName;
document.body.appendChild(a);
a.click(); // This triggers the download
document.body.removeChild(a);
window.URL.revokeObjectURL(downloadUrl);
console.log(`下载成功: ${finalFileName}`);
if (showProgress) {
showTip(`下载完成: ${finalFileName}`, 4000, false, true);
} else {
// Optionally provide minimal feedback for batch success
// console.log(`Batch download success: ${finalFileName}`);
}
} else {
console.error(`下载失败 (${this.status}): ${finalFileName}`);
if (showProgress) {
showTip(`下载失败 (${this.status}): ${finalFileName}`, 5000, true, false);
} else {
// Show error for batch download failure
showTip(`下载失败 (${this.status}): ${finalFileName.substring(0, 30)}...`, 4000, true);
}
}
};
xhr.onerror = function () {
if (showProgress) {
const progressBar = div.querySelector('progress');
if(progressBar) progressBar.value = 0; // Reset progress on error
}
console.error("下载时发生网络错误: ", fullFileName);
if (showProgress) {
showTip(`下载网络错误: ${fullFileName}`, 5000, true, false);
} else {
showTip(`网络错误: ${fullFileName.substring(0, 30)}...`, 4000, true);
}
};
xhr.send();
}
// --- Modal Logic ---
// createModalElement, populateModalList (Keep as is from v1.21)
function createModalElement() {
// If modal already exists, just return it
if (modalInstance) return modalInstance;
const overlay = document.createElement('div');
overlay.className = 'cx-modal-overlay';
overlay.style.display = 'none'; // Start hidden
const content = document.createElement('div');
content.className = 'cx-modal-content';
const title = document.createElement('div');
title.className = 'cx-modal-title';
title.textContent = '选择要下载的资源';
const listContainer = document.createElement('div');
listContainer.className = 'cx-modal-list';
const list = document.createElement('ul');
listContainer.appendChild(list);
const actions = document.createElement('div');
actions.className = 'cx-modal-actions';
const downloadButton = document.createElement('button');
downloadButton.className = 'cx-modal-button cx-modal-button-primary';
downloadButton.textContent = '下载选中';
const cancelButton = document.createElement('button');
cancelButton.className = 'cx-modal-button cx-modal-button-secondary';
cancelButton.textContent = '取消';
actions.appendChild(cancelButton);
actions.appendChild(downloadButton); // Primary button last
content.appendChild(title);
content.appendChild(listContainer);
content.appendChild(actions);
overlay.appendChild(content);
// Close modal listeners
cancelButton.onclick = () => overlay.style.display = 'none';
overlay.onclick = (e) => {
if (e.target === overlay) { // Only close if clicking the overlay itself
overlay.style.display = 'none';
}
};
document.body.appendChild(overlay);
modalInstance = { overlay, list, downloadButton }; // Store the instance
return modalInstance;
}
function populateModalList(listElement, resources, preselectPdf = false) {
listElement.innerHTML = ''; // Clear previous items
if (resources.length === 0) {
listElement.innerHTML = '<li><i>未找到可识别的资源。</i></li>';
return;
}
resources.forEach((res, index) => {
const li = document.createElement('li');
const checkbox = document.createElement('input');
checkbox.type = 'checkbox';
checkbox.id = `cx-res-${index}`;
checkbox.value = index; // Store index to retrieve resource data later
checkbox.checked = (preselectPdf && res.type === 'PDF' && !res.error); // Preselect PDFs if requested and valid
const label = document.createElement('label');
label.htmlFor = `cx-res-${index}`; // Keep htmlFor for accessibility
label.textContent = res.filename || '未知文件';
label.title = res.filename || '未知文件'; // Full name on hover
li.appendChild(checkbox);
li.appendChild(label);
if (res.error) {
const errorSpan = document.createElement('span');
errorSpan.className = 'file-error';
errorSpan.textContent = `(${res.error})`;
li.appendChild(errorSpan);
checkbox.disabled = true; // Disable checkbox for errored items
li.style.opacity = '0.6';
li.style.cursor = 'not-allowed';
} else {
const typeSpan = document.createElement('span');
typeSpan.className = 'file-type';
typeSpan.textContent = res.type || '未知';
li.appendChild(typeSpan);
// **MODIFIED:** Make clicking the list item toggle the checkbox
li.onclick = (e) => {
// Don't toggle if the click was on the disabled error span
if (e.target.classList.contains('file-error')) return;
// Toggle the checkbox state directly
if (!checkbox.disabled) {
checkbox.checked = !checkbox.checked;
}
};
}
listElement.appendChild(li);
});
}
async function showResourceSelectionModal(preselectPdf = false) {
showTip("正在查找资源列表...", 0);
const objectids = get_objectids();
if (objectids.length === 0) {
hideTipsDiv();
showTip("未找到任何资源对象ID。", 3000, true);
return;
}
const resourcePromises = objectids.map(id => fetchResourceDetails(id));
const resources = await Promise.all(resourcePromises);
hideTipsDiv();
const validResources = resources.filter(res => !res.error && (res.downloadUrl || res.openDirectly));
if (validResources.length === 0) {
showTip("未找到可下载的资源。", 3000, true);
return;
}
const modal = createModalElement();
populateModalList(modal.list, validResources, preselectPdf);
// **MODIFIED:** Download button click handler using downloadFile for batch
modal.downloadButton.onclick = async () => {
const selectedIndices = Array.from(modal.list.querySelectorAll('input[type="checkbox"]:checked'))
.map(cb => parseInt(cb.value, 10));
if (selectedIndices.length === 0) {
alert("请至少选择一个要下载的资源。");
return;
}
modal.overlay.style.display = 'none';
if (selectedIndices.length === 1) {
// Single download: use downloadFile with progress
const resource = validResources[selectedIndices[0]];
if (resource.openDirectly) {
console.log("打开直接链接:", resource.filename);
window.open(resource.downloadUrl);
showTip(`已尝试打开: ${resource.filename}`, 3000);
} else if (resource.downloadUrl) {
downloadFile(resource.downloadUrl, resource.filename, true); // Show progress
} else {
showTip(`无法处理 ${resource.filename}: 无有效链接`, 4000, true);
}
} else {
// Multiple downloads: use downloadFile without progress, with delay
const directOpenQueue = [];
const downloadQueue = [];
selectedIndices.forEach(index => {
const resource = validResources[index];
if (resource.openDirectly) {
directOpenQueue.push(resource);
} else if (resource.downloadUrl) {
downloadQueue.push(resource);
} else {
console.warn(`无法处理 ${resource.filename}: 无有效链接`);
}
});
let openCount = directOpenQueue.length;
let downloadTotal = downloadQueue.length;
showTip(`准备处理 ${openCount} 个直接链接和 ${downloadTotal} 个下载...`, 0);
// 1. Open direct links
if (openCount > 0) {
console.log(`正在打开 ${openCount} 个直接链接...`);
directOpenQueue.forEach(res => {
console.log("打开直接链接:", res.filename);
window.open(res.downloadUrl);
});
}
// 2. Process download queue with delay using downloadFile(..., false)
if (downloadTotal > 0) {
console.log(`开始处理 ${downloadTotal} 个下载 (带延迟)...`);
let initiatedCount = 0;
for (const res of downloadQueue) {
// Call downloadFile WITHOUT progress indicator
downloadFile(res.downloadUrl, res.filename, false);
initiatedCount++;
console.log(`已尝试启动下载 (${initiatedCount}/${downloadTotal}): ${res.filename}`);
// Update status occasionally
if (initiatedCount % 3 === 0 || initiatedCount === downloadTotal) {
showTip(`已尝试启动 ${initiatedCount}/${downloadTotal} 个下载...`, 0);
}
await delay(500); // Wait 500ms between initiating XHR downloads
}
// Final message after loop
setTimeout(() => showTip(`处理完成: ${openCount} 个链接已打开, ${initiatedCount} 个下载已尝试启动。`, 6000), 500);
} else if (openCount > 0) {
// If only direct links were opened
setTimeout(() => showTip(`已尝试打开 ${openCount} 个链接。`, 4000), 500);
} else {
showTip(`未找到有效文件进行处理。`, 4000, true);
}
}
};
modal.overlay.style.display = 'flex';
}
// --- Quick Download All PDFs (D key) ---
// **MODIFIED:** Use downloadFile(..., false) for consistency and robustness
async function downloadAllPdfsDirectly() {
showTip("正在查找并下载所有PDF...", 0);
const objectids = get_objectids();
if (objectids.length === 0) {
hideTipsDiv();
showTip("未找到任何资源对象ID。", 3000, true);
return;
}
const resourcePromises = objectids.map(id => fetchResourceDetails(id));
const resources = await Promise.all(resourcePromises);
const pdfResources = resources.filter(res => res.type === 'PDF' && !res.error && res.downloadUrl);
if (pdfResources.length === 0) {
hideTipsDiv();
showTip("未找到可下载的PDF文件。", 3000);
return;
}
hideTipsDiv();
showTip(`开始下载 ${pdfResources.length} 个PDF文件...`, 0);
let downloadCount = 0;
for (const res of pdfResources) {
// Use downloadFile without progress for D key shortcut as well
downloadFile(res.downloadUrl, res.filename, false);
downloadCount++;
await delay(300); // Keep a small delay
}
setTimeout(() => showTip(`已尝试启动 ${downloadCount} 个PDF文件的下载。`, 5000), 500);
}
// --- UI and Event Listeners ---
// (Button creation and keydown listener remain the same as v1.21)
// Create main action buttons container
var buttonContainer = document.createElement('div');
buttonContainer.style.position = 'fixed';
buttonContainer.style.left = '10px';
buttonContainer.style.top = '50%';
buttonContainer.style.transform = 'translateY(-50%)';
buttonContainer.style.display = 'flex';
buttonContainer.style.flexDirection = 'column';
buttonContainer.style.zIndex = '10000';
// **MODIFIED:** Only one button now
var downloadButton = document.createElement('button');
downloadButton.className = 'cx-action-button';
downloadButton.textContent = '下载资源'; // Changed text
downloadButton.title = '点击选择要下载的文件'; // Changed title
downloadButton.style.backgroundColor = '#81C784'; // Green color
downloadButton.addEventListener('click', () => showResourceSelectionModal(false)); // Don't preselect PDF
// Add the single button to container
buttonContainer.appendChild(downloadButton);
document.body.appendChild(buttonContainer);
// Keyboard shortcut (D key for downloading all PDFs directly)
document.addEventListener('keydown', function (e) {
if (e.target.tagName === 'INPUT' || e.target.tagName === 'TEXTAREA' || e.target.isContentEditable) {
return;
}
// Check if modal is open, if so, don't trigger D key shortcut
const modalOverlay = document.querySelector('.cx-modal-overlay');
if (modalOverlay && modalOverlay.style.display !== 'none') {
return;
}
if (e.key === 'd' || e.key === 'D' || e.keyCode === 68) {
console.log("检测到 'D' 键按下，开始直接下载所有PDF...");
e.preventDefault();
downloadAllPdfsDirectly(); // Call the direct download function
}
});
console.log("超星学习通下载脚本 (v1.22 - 修复多选) 已加载。");
})();