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屏蔽任意网站上的元素，支持缩略图记录和正则/简单模式屏蔽，新增动态屏蔽
// ==UserScript==
// @name 网页元素屏蔽器
// @namespace http://tampermonkey.net/
// @version 0.4
// @description 屏蔽任意网站上的元素，支持缩略图记录和正则/简单模式屏蔽，新增动态屏蔽
// @author JerryChiang
// @match *://*/*
// @grant GM_registerMenuCommand
// @grant GM_setValue
// @grant GM_getValue
// @license MIT
// ==/UserScript==
(function() {
'use strict';
// 添加样式
const style = document.createElement('style');
style.textContent = `
.highlight {
outline: 2px solid red !important;
background-color: rgba(255, 0, 0, 0.1) !important;
}
.blocker-popup {
position: fixed;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
background: white;
padding: 20px;
border: 1px solid #ccc;
z-index: 9999;
box-shadow: 0 0 10px rgba(0,0,0,0.3);
border-radius: 8px;
font-family: Arial, sans-serif;
width: 600px;
max-height: 80vh;
overflow-y: auto;
}
.blocker-popup p {
margin: 0 0 10px;
font-size: 16px;
color: #333;
}
.blocker-popup button {
margin: 5px;
padding: 8px 16px;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 14px;
transition: background-color 0.2s;
}
.blocker-popup button:hover {
opacity: 0.9;
}
#static-block {
background-color: #007bff;
color: white;
}
#dynamic-block {
background-color: #28a745;
color: white;
}
#preview {
background-color: #17a2b8;
color: white;
}
#cancel {
background-color: #dc3545;
color: white;
}
.blocker-popup input, .blocker-popup select {
margin: 5px;
padding: 8px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 14px;
}
.rule-row {
display: flex;
align-items: center;
margin: 5px 0;
padding: 5px;
border-bottom: 1px solid #eee;
}
.blocker-list {
position: fixed;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
background: white;
padding: 20px;
border: 1px solid #ccc;
z-index: 9999;
max-height: 80vh;
overflow-y: auto;
width: 500px;
border-radius: 8px;
box-shadow: 0 0 10px rgba(0,0,0,0.3);
}
.blocker-list h3 {
margin: 0 0 15px;
font-size: 18px;
color: #333;
}
.blocker-list ul {
list-style: none;
padding: 0;
}
.blocker-list li {
margin: 10px 0;
display: flex;
align-items: center;
width: 100%;
padding: 5px;
border-bottom: 1px solid #eee;
}
.blocker-list img {
max-width: 400px;
max-height: 100px;
object-fit: contain;
border: 1px solid #ddd;
flex-shrink: 0;
}
.blocker-list button {
margin-left: auto;
flex-shrink: 0;
padding: 5px 10px;
background-color: #dc3545;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
}
.blocker-list button:hover {
background-color: #c82333;
}
`;
document.head.appendChild(style);
// 注册菜单
GM_registerMenuCommand('手动屏蔽', startBlockingMode);
GM_registerMenuCommand('按规则屏蔽', showRegexBlockInput);
GM_registerMenuCommand('查看屏蔽记录', showBlockList);
GM_registerMenuCommand('清除当前域名屏蔽规则（点击后需要快速点击回车）', clearDomainBlocks);
// 进入元素选择模式
function startBlockingMode() {
document.body.addEventListener('mouseover', highlightElement);
document.body.addEventListener('click', selectElement, true);
}
// 高亮悬停元素
function highlightElement(event) {
if (window.lastHighlighted) {
window.lastHighlighted.classList.remove('highlight');
}
event.target.classList.add('highlight');
window.lastHighlighted = event.target;
}
// 选择元素并弹出确认窗口
function selectElement(event) {
event.preventDefault();
event.stopPropagation();
document.body.removeEventListener('mouseover', highlightElement);
document.body.removeEventListener('click', selectElement, true);
const selectedElement = event.target;
window.lastHighlighted.classList.remove('highlight');
showConfirmation(selectedElement);
}
// 显示确认弹窗
function showConfirmation(element) {
const popup = document.createElement('div');
popup.className = 'blocker-popup';
popup.innerHTML = `
<p>选择屏蔽方式：</p>
<button id="static-block">静态屏蔽</button>
<button id="dynamic-block">动态屏蔽</button>
<button id="preview">预览</button>
<button id="cancel">取消</button>
`;
document.body.appendChild(popup);
let isPreviewHidden = false;
const staticBtn = document.getElementById('static-block');
staticBtn.addEventListener('click', async () => {
staticBtn.disabled = true;
try {
await saveBlockWithThumbnail(element, 'static');
element.style.display = 'none';
document.body.removeChild(popup);
} catch (e) {
console.error('静态屏蔽失败:', e);
staticBtn.disabled = false;
}
}, { once: true });
const dynamicBtn = document.getElementById('dynamic-block');
dynamicBtn.addEventListener('click', async () => {
dynamicBtn.disabled = true;
try {
await saveBlockWithThumbnail(element, 'dynamic');
applyDynamicBlocks();
document.body.removeChild(popup);
} catch (e) {
console.error('动态屏蔽失败:', e);
dynamicBtn.disabled = false;
}
}, { once: true });
document.getElementById('preview').addEventListener('click', () => {
if (!isPreviewHidden) {
element.style.display = 'none';
isPreviewHidden = true;
} else {
element.style.display = '';
isPreviewHidden = false;
}
});
document.getElementById('cancel').addEventListener('click', () => {
document.body.removeChild(popup);
});
}
// 保存屏蔽信息并生成缩略图
async function saveBlockWithThumbnail(element, type = 'static') {
const domain = window.location.hostname;
const selector = getSelector(element);
const rect = element.getBoundingClientRect();
const width = rect.width;
const height = rect.height;
const canvas = document.createElement('canvas');
const ctx = canvas.getContext('2d');
canvas.width = width;
canvas.height = height;
let thumbnail = null;
try {
const computedStyle = window.getComputedStyle(element);
ctx.fillStyle = computedStyle.backgroundColor || '#ffffff';
ctx.fillRect(0, 0, width, height);
if (element.textContent.trim()) {
ctx.fillStyle = computedStyle.color || '#000000';
ctx.font = `${computedStyle.fontSize || '16px'} ${computedStyle.fontFamily || 'Arial'}`;
ctx.textAlign = 'left';
ctx.textBaseline = 'top';
const paddingLeft = parseInt(computedStyle.paddingLeft) || 0;
const paddingTop = parseInt(computedStyle.paddingTop) || 0;
wrapText(ctx, element.textContent.trim(), paddingLeft, paddingTop, width - paddingLeft * 2, parseInt(computedStyle.fontSize) || 16);
}
let scale = Math.min(400 / width, 100 / height, 1);
const thumbnailCanvas = document.createElement('canvas');
thumbnailCanvas.width = width * scale;
thumbnailCanvas.height = height * scale;
const thumbnailCtx = thumbnailCanvas.getContext('2d');
thumbnailCtx.drawImage(canvas, 0, 0, thumbnailCanvas.width, thumbnailCanvas.height);
thumbnail = thumbnailCanvas.toDataURL('image/png');
} catch (e) {
console.error('生成缩略图失败:', e);
}
if (type === 'static') {
let blocks = GM_getValue('blocks', {});
if (!blocks[domain]) blocks[domain] = [];
if (!blocks[domain].some(item => item.selector === selector)) {
blocks[domain].push({ selector, thumbnail: thumbnail || null, type: 'static' });
GM_setValue('blocks', blocks);
}
} else if (type === 'dynamic') {
const className = element.className.split(' ').filter(c => c)[0] || '';
let dynamicBlocks = GM_getValue('dynamicBlocks', {});
if (!dynamicBlocks[domain]) dynamicBlocks[domain] = [];
if (!dynamicBlocks[domain].some(item => item.className === className)) {
dynamicBlocks[domain].push({ className, thumbnail: thumbnail || null, type: 'dynamic' });
GM_setValue('dynamicBlocks', dynamicBlocks);
}
}
return true;
}
// 辅助函数：将文本换行绘制到 canvas
function wrapText(ctx, text, x, y, maxWidth, lineHeight) {
const words = text.split(' ');
let line = '';
let currentY = y;
for (let i = 0; i < words.length; i++) {
const testLine = line + words[i] + ' ';
const metrics = ctx.measureText(testLine);
const testWidth = metrics.width;
if (testWidth > maxWidth && i > 0) {
ctx.fillText(line, x, currentY);
line = words[i] + ' ';
currentY += lineHeight;
} else {
line = testLine;
}
}
ctx.fillText(line, x, currentY);
}
// 生成简单 CSS 选择器
function getSelector(element) {
if (element.id) return `#${element.id}`;
let path = [];
while (element && element.nodeType === Node.ELEMENT_NODE) {
let selector = element.tagName.toLowerCase();
if (element.className && typeof element.className === 'string') {
selector += '.' + element.className.trim().replace(/\s+/g, '.');
}
path.unshift(selector);
element = element.parentElement;
}
return path.join(' > ');
}
// 应用屏蔽规则（静态 + 动态 + 正则）
function applyBlocks() {
const domain = window.location.hostname;
const blocks = GM_getValue('blocks', {});
const dynamicBlocks = GM_getValue('dynamicBlocks', {});
const regexBlocks = GM_getValue('regexBlocks', {});
// 应用静态屏蔽
if (blocks[domain]) {
blocks[domain].forEach(item => {
try {
document.querySelectorAll(item.selector).forEach(el => {
if (!el.closest('.blocker-popup') && !el.closest('.blocker-list')) {
el.style.display = 'none';
}
});
} catch (e) {
console.error(`无法应用选择器: ${item.selector}`, e);
}
});
}
// 应用动态屏蔽
if (dynamicBlocks[domain]) {
dynamicBlocks[domain].forEach(rule => {
const elements = document.getElementsByClassName(rule.className);
Array.from(elements).forEach(el => {
if (!el.closest('.blocker-popup') && !el.closest('.blocker-list')) {
el.style.display = 'none';
}
});
});
}
// 应用正则屏蔽
if (regexBlocks[domain]) {
regexBlocks[domain].forEach(rule => {
try {
const regex = new RegExp(rule.regex);
const walker = document.createTreeWalker(document.body, NodeFilter.SHOW_TEXT, {
acceptNode: (node) => {
const parent = node.parentElement;
return (parent && (parent.closest('.blocker-popup') || parent.closest('.blocker-list')))
? NodeFilter.FILTER_REJECT
: NodeFilter.FILTER_ACCEPT;
}
}, false);
let node;
while (node = walker.nextNode()) {
if (regex.test(node.textContent)) {
let element = node.parentElement;
for (let i = 0; i < rule.level; i++) {
if (element.parentElement) element = element.parentElement;
else break;
}
element.style.display = 'none';
}
}
} catch (e) {
console.error(`无法应用规则: ${rule.regex}`, e);
}
});
}
}
// 应用动态屏蔽（独立函数已无必要，保留为空兼容旧调用）
function applyDynamicBlocks() {
applyBlocks(); // 直接调用统一应用函数
}
// 显示屏蔽记录窗口
function showBlockList() {
const domain = window.location.hostname;
const blocks = GM_getValue('blocks', {});
const dynamicBlocks = GM_getValue('dynamicBlocks', {});
const blockList = (blocks[domain] || []).concat(dynamicBlocks[domain] || []);
const listWindow = document.createElement('div');
listWindow.className = 'blocker-list';
listWindow.innerHTML = `
<h3>当前域名屏蔽记录 (${domain})</h3>
<ul id="block-items"></ul>
<button id="close-list">关闭</button>
`;
document.body.appendChild(listWindow);
const ul = document.getElementById('block-items');
if (blockList.length === 0) {
ul.innerHTML = '<li>暂无屏蔽记录</li>';
} else {
blockList.forEach((item, index) => {
const li = document.createElement('li');
if (item.thumbnail) {
const img = document.createElement('img');
img.src = item.thumbnail;
li.appendChild(img);
} else {
li.textContent = item.type === 'static' ? item.selector : item.className;
}
const unblockBtn = document.createElement('button');
unblockBtn.textContent = '取消屏蔽';
unblockBtn.addEventListener('click', () => {
removeBlock(domain, index, item.type);
listWindow.remove();
applyBlocks();
showBlockList();
});
li.appendChild(unblockBtn);
ul.appendChild(li);
});
}
document.getElementById('close-list').addEventListener('click', () => {
document.body.removeChild(listWindow);
});
}
// 删除屏蔽记录
function removeBlock(domain, index, type) {
if (type === 'static') {
let blocks = GM_getValue('blocks', {});
if (blocks[domain] && blocks[domain][index]) {
blocks[domain].splice(index, 1);
if (blocks[domain].length === 0) delete blocks[domain];
GM_setValue('blocks', blocks);
}
} else if (type === 'dynamic') {
let dynamicBlocks = GM_getValue('dynamicBlocks', {});
const staticCount = (GM_getValue('blocks', {})[domain] || []).length;
const dynamicIndex = index - staticCount;
if (dynamicBlocks[domain] && dynamicBlocks[domain][dynamicIndex]) {
dynamicBlocks[domain].splice(dynamicIndex, 1);
if (dynamicBlocks[domain].length === 0) delete dynamicBlocks[domain];
GM_setValue('dynamicBlocks', dynamicBlocks);
}
}
}
// 显示规则屏蔽输入和管理窗口
function showRegexBlockInput() {
const domain = window.location.hostname;
let regexBlocks = GM_getValue('regexBlocks', {});
let rules = regexBlocks[domain] || [];
const popup = document.createElement('div');
popup.className = 'blocker-popup';
popup.innerHTML = `
<p>设置屏蔽规则（层级：0 表示当前元素，1 表示父元素，依此类推，请先点击预览，避免失误将整个页面清除）：</p>
<button id="regex-mode">正则模式</button>
<button id="simple-mode">简单模式</button>
<div id="input-container"></div>
<div id="rules-list">
<h3>当前规则列表</h3>
<div id="rules-rows"></div>
</div>
<div>
<button id="add-rule-row">新增规则</button>
<button id="save-rules">保存</button>
<button id="cancel-rule">取消</button>
</div>
`;
document.body.appendChild(popup);
document.getElementById('regex-mode').style.backgroundColor = '#007bff';
document.getElementById('regex-mode').style.color = 'white';
document.getElementById('simple-mode').style.backgroundColor = '#007bff';
document.getElementById('simple-mode').style.color = 'white';
document.getElementById('add-rule-row').style.backgroundColor = '#17a2b8';
document.getElementById('add-rule-row').style.color = 'white';
document.getElementById('save-rules').style.backgroundColor = '#17a2b8';
document.getElementById('save-rules').style.color = 'white';
document.getElementById('cancel-rule').style.backgroundColor = '#dc3545';
document.getElementById('cancel-rule').style.color = 'white';
let isDragging = false;
let currentX;
let currentY;
let initialX;
let initialY;
popup.addEventListener('mousedown', (e) => {
if (e.target.tagName !== 'BUTTON' && e.target.tagName !== 'INPUT' && e.target.tagName !== 'SELECT') {
isDragging = true;
initialX = e.clientX - currentX;
initialY = e.clientY - currentY;
popup.style.cursor = 'grabbing';
}
});
document.addEventListener('mousemove', (e) => {
if (isDragging) {
e.preventDefault();
currentX = e.clientX - initialX;
currentY = e.clientY - initialY;
popup.style.left = `${currentX + (popup.offsetWidth / 2)}px`;
popup.style.top = `${currentY + (popup.offsetHeight / 2)}px`;
popup.style.transform = 'none';
}
});
document.addEventListener('mouseup', () => {
isDragging = false;
popup.style.cursor = 'default';
});
currentX = window.innerWidth / 2 - popup.offsetWidth / 2;
currentY = window.innerHeight / 2 - popup.offsetHeight / 2;
popup.style.left = `${currentX + (popup.offsetWidth / 2)}px`;
popup.style.top = `${currentY + (popup.offsetHeight / 2)}px`;
const inputContainer = document.getElementById('input-container');
const rulesRows = document.getElementById('rules-rows');
let isSimpleMode = false;
let tempRules = [...rules];
function showRegexInput() {
inputContainer.innerHTML = `
<div class="rule-row">
<input type="text" class="regex-input" placeholder="正则规则" />
<input type="number" class="level-input" placeholder="层级" value="0" min="0" />
<button class="preview-rule">预览</button>
</div>
`;
document.querySelector('.preview-rule').style.backgroundColor = '#28a745';
document.querySelector('.preview-rule').style.color = 'white';
attachPreviewListeners();
}
function showSimpleInput() {
inputContainer.innerHTML = `
<div class="rule-row">
<select class="logic-select">
<option value="contains">包含</option>
<option value="not-contains">不包含</option>
<option value="equals">等于</option>
</select>
<input type="text" class="simple-input" placeholder="文本内容" />
<input type="number" class="level-input" placeholder="层级" value="0" min="0" />
<button class="preview-rule">预览</button>
</div>
`;
document.querySelector('.preview-rule').style.backgroundColor = '#28a745';
document.querySelector('.preview-rule').style.color = 'white';
attachPreviewListeners();
}
document.getElementById('regex-mode').addEventListener('click', () => {
isSimpleMode = false;
showRegexInput();
});
document.getElementById('simple-mode').addEventListener('click', () => {
isSimpleMode = true;
showSimpleInput();
});
showRegexInput();
function renderRules() {
rulesRows.innerHTML = '';
if (tempRules.length === 0) {
rulesRows.innerHTML = '<p>暂无规则</p>';
return;
}
tempRules.forEach((rule, index) => {
const row = document.createElement('div');
row.className = 'rule-row';
row.innerHTML = `
<input type="text" class="rule-regex" value="${rule.regex}" />
<input type="number" class="rule-level" value="${rule.level}" min="0" />
<button class="delete-rule">删除</button>
`;
const regexInput = row.querySelector('.rule-regex');
const levelInput = row.querySelector('.rule-level');
const deleteBtn = row.querySelector('.delete-rule');
regexInput.addEventListener('input', () => {
tempRules[index].regex = regexInput.value;
});
levelInput.addEventListener('input', () => {
tempRules[index].level = parseInt(levelInput.value, 10);
});
deleteBtn.addEventListener('click', () => {
tempRules.splice(index, 1);
renderRules();
});
rulesRows.appendChild(row);
});
}
document.getElementById('add-rule-row').addEventListener('click', () => {
let regex, level;
if (isSimpleMode) {
const logic = inputContainer.querySelector('.logic-select').value;
const text = inputContainer.querySelector('.simple-input').value.trim();
level = parseInt(inputContainer.querySelector('.level-input').value, 10);
if (!text || isNaN(level) || level < 0) {
alert('请输入有效的文本和层级');
return;
}
regex = convertSimpleToRegex(logic, text);
} else {
regex = inputContainer.querySelector('.regex-input').value.trim();
level = parseInt(inputContainer.querySelector('.level-input').value, 10);
if (!regex || isNaN(level) || level < 0) {
alert('请输入有效的正则规则和层级');
return;
}
}
tempRules.push({ regex, level });
renderRules();
if (isSimpleMode) {
inputContainer.querySelector('.simple-input').value = '';
inputContainer.querySelector('.level-input').value = '0';
} else {
inputContainer.querySelector('.regex-input').value = '';
inputContainer.querySelector('.level-input').value = '0';
}
});
document.getElementById('save-rules').addEventListener('click', () => {
regexBlocks[domain] = tempRules;
GM_setValue('regexBlocks', regexBlocks);
applyBlocks();
document.body.removeChild(popup);
});
document.getElementById('cancel-rule').addEventListener('click', () => {
document.body.removeChild(popup);
});
function convertSimpleToRegex(logic, text) {
const escapedText = text.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
switch (logic) {
case 'contains': return `.*${escapedText}.*`;
case 'not-contains': return `^(?!.*${escapedText}).*$`;
case 'equals': return `^${escapedText}$`;
default: return escapedText;
}
}
function attachPreviewListeners() {
const previewBtn = inputContainer.querySelector('.preview-rule');
let previewActive = false;
let affectedElements = [];
previewBtn.addEventListener('click', () => {
if (!previewActive) {
let regex, level;
if (isSimpleMode) {
const logic = inputContainer.querySelector('.logic-select').value;
const text = inputContainer.querySelector('.simple-input').value.trim();
level = parseInt(inputContainer.querySelector('.level-input').value, 10);
if (!text || isNaN(level) || level < 0) {
alert('请输入有效的文本和层级');
return;
}
regex = convertSimpleToRegex(logic, text);
} else {
regex = inputContainer.querySelector('.regex-input').value.trim();
level = parseInt(inputContainer.querySelector('.level-input').value, 10);
if (!regex || isNaN(level) || level < 0) {
alert('请输入有效的正则规则和层级');
return;
}
}
try {
const ruleRegex = new RegExp(regex);
const walker = document.createTreeWalker(document.body, NodeFilter.SHOW_TEXT, {
acceptNode: (node) => {
const parent = node.parentElement;
return (parent && (parent.closest('.blocker-popup') || parent.closest('.blocker-list')))
? NodeFilter.FILTER_REJECT
: NodeFilter.FILTER_ACCEPT;
}
}, false);
let node;
affectedElements = [];
while (node = walker.nextNode()) {
if (ruleRegex.test(node.textContent)) {
let element = node.parentElement;
for (let i = 0; i < level; i++) {
if (element.parentElement) element = element.parentElement;
else break;
}
affectedElements.push(element);
element.style.display = 'none';
}
}
previewActive = true;
previewBtn.textContent = '取消预览';
} catch (e) {
alert('正则表达式无效，请检查输入');
}
} else {
affectedElements.forEach(el => el.style.display = '');
affectedElements = [];
previewActive = false;
previewBtn.textContent = '预览';
}
});
}
renderRules();
}
// 清除当前域名屏蔽规则
function clearDomainBlocks() {
const domain = window.location.hostname;
if (window.confirm(`是否确认清除当前域名 (${domain}) 下的所有屏蔽规则？`)) {
let blocks = GM_getValue('blocks', {});
let dynamicBlocks = GM_getValue('dynamicBlocks', {});
let regexBlocks = GM_getValue('regexBlocks', {});
delete blocks[domain];
delete dynamicBlocks[domain];
delete regexBlocks[domain];
GM_setValue('blocks', blocks);
GM_setValue('dynamicBlocks', dynamicBlocks);
GM_setValue('regexBlocks', regexBlocks);
// 刷新页面以恢复显示
window.location.reload();
}
}
// 页面加载时立即应用所有屏蔽规则
applyBlocks();
const observer = new MutationObserver(() => applyBlocks());
observer.observe(document.body, { childList: true, subtree: true });
})();