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通过CSS选择器获取网页指定区域的文本内容，并输出为CSV文件。
// ==UserScript==
// @name 网页区域文本提取为CSV
// @namespace http://tampermonkey.net/
// @version 1.2
// @description 通过CSS选择器获取网页指定区域的文本内容，并输出为CSV文件。
// @description:en Extracts text content from a specified webpage area using a CSS selector and outputs it as a CSV file.
// @author tonyan
// @match *://*/*
// @grant GM_addStyle
// @grant GM_setClipboard
// @license MIT
// ==/UserScript==
(function() {
'use strict';
// --- 配置 ---
const BUTTON_TEXT = '提取文本为CSV';
const INPUT_PLACEHOLDER = '输入css选择器（例如：.next-table-row）';
const FILENAME_PREFIX = 'extracted_data_';
const DEFAULT_HEADER = '提取的文本';
const TRIGGER_BUTTON_TEXT = '提取区域文本';
const DEFAULT_SELECTOR_ON_TAB = '.next-table-row';
const MAX_HISTORY_SIZE = 20;
const HISTORY_STORAGE_KEY = 'tepSelectorHistory';
// --- 历史记录状态变量 (提升作用域) ---
let selectorHistory = [];
let currentHistoryIndex = -1;
let originalInputValueBeforeNav = '';
// --- 工具函数 ---
function escapeCsvCell(cell) {
if (cell == null) { // 处理 null 或 undefined
return '';
}
cell = String(cell).trim(); // 确保是字符串并去除首尾空格
// 如果单元格包含逗号、换行符或双引号，则用双引号包围
// 并且单元格内的双引号需要替换为两个双引号
if (cell.search(/[,_"\n]/g) >= 0) {
cell = `"${cell.replace(/"/g, '""')}"`;
}
return cell;
}
function loadSelectorHistory() {
const storedHistory = localStorage.getItem(HISTORY_STORAGE_KEY);
if (storedHistory) {
try {
selectorHistory = JSON.parse(storedHistory);
if (!Array.isArray(selectorHistory)) { // 基本的验证
selectorHistory = [];
}
} catch (e) {
console.error("Error parsing selector history:", e);
selectorHistory = [];
}
} else {
selectorHistory = [];
}
}
function saveSelectorToHistory(selector) {
selector = selector.trim();
if (!selector) return;
loadSelectorHistory(); //确保操作的是最新的内存中历史记录
const existingIndex = selectorHistory.indexOf(selector);
if (existingIndex > -1) {
selectorHistory.splice(existingIndex, 1);
}
selectorHistory.unshift(selector);
if (selectorHistory.length > MAX_HISTORY_SIZE) {
selectorHistory.length = MAX_HISTORY_SIZE;
}
try {
localStorage.setItem(HISTORY_STORAGE_KEY, JSON.stringify(selectorHistory));
} catch (e) {
console.error("Error saving selector history:", e);
}
}
function downloadCsv(csvContent, filename) {
const blob = new Blob([csvContent], { type: 'text/csv;charset=utf-8;' });
const link = document.createElement("a");
if (link.download !== undefined) { // feature detection
const url = URL.createObjectURL(blob);
link.setAttribute("href", url);
link.setAttribute("download", filename);
link.style.visibility = 'hidden';
document.body.appendChild(link);
link.click();
document.body.removeChild(link);
URL.revokeObjectURL(url);
} else {
alert("您的浏览器不支持自动下载。请尝试手动复制内容。");
GM_setClipboard(csvContent, 'text');
alert("CSV内容已复制到剪贴板。");
}
}
function createUI() {
const panel = document.createElement('div');
panel.id = 'text-extractor-panel';
panel.classList.add('tep-hidden'); //确保主面板初始隐藏
panel.innerHTML = `
<div class="tep-header">区域文本提取<span id="tep-close-button" class="tep-close-btn">×</span></div>
<input type="text" id="tep-selector-input" placeholder="${INPUT_PLACEHOLDER}">
<button id="tep-extract-button">${BUTTON_TEXT}</button>
<div id="tep-status" class="tep-status-message"></div>
`;
document.body.appendChild(panel);
const triggerButton = document.createElement('button');
triggerButton.id = 'tep-trigger-button';
triggerButton.textContent = TRIGGER_BUTTON_TEXT;
document.body.appendChild(triggerButton);
GM_addStyle(`
#text-extractor-panel {
position: fixed;
bottom: 20px;
right: 20px;
background-color: #f0f0f0;
border: 1px solid #ccc;
padding: 15px;
border-radius: 8px;
box-shadow: 0 4px 8px rgba(0,0,0,0.2);
z-index: 99999;
font-family: Arial, sans-serif;
color: #333;
}
#text-extractor-panel .tep-header {
font-size: 16px;
font-weight: bold;
margin-bottom: 10px;
text-align: center;
position: relative; /* 为关闭按钮提供定位上下文 */
}
#tep-selector-input {
width: calc(100% - 22px); /* 减去 padding 和 border */
padding: 8px;
margin-bottom: 10px;
border: 1px solid #ddd;
border-radius: 4px;
font-size: 14px;
}
#tep-extract-button {
width: 100%;
padding: 10px;
background-color: #4CAF50;
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 15px;
}
#tep-extract-button:hover {
background-color: #45a049;
}
.tep-status-message {
margin-top: 10px;
font-size: 12px;
text-align: center;
}
.tep-status-error {
color: red;
}
.tep-status-success {
color: green;
}
#tep-trigger-button {
position: fixed;
bottom: 80px; /* 与主面板错开 */
right: 0px;
background-color: #4CAF50; /* 与原按钮颜色一致 */
color: white;
border: none;
padding: 10px 15px;
border-top-left-radius: 5px;
border-bottom-left-radius: 5px;
cursor: pointer;
z-index: 100000; /* 确保在最上层 */
transform: translateX(calc(100% - 40px)); /* 初始露出40px */
transition: transform 0.3s ease-in-out, background-color 0.3s ease;
font-size: 14px;
box-shadow: -2px 2px 5px rgba(0,0,0,0.2);
white-space: nowrap; /* 防止文字换行 */
}
#tep-trigger-button:hover {
transform: translateX(0);
background-color: #45a049; /* 悬停颜色加深 */
}
.tep-hidden {
display: none !important;
}
.tep-visible {
display: block !important;
}
.tep-close-btn {
position: absolute;
top: 5px;
right: 8px;
font-size: 24px;
color: #aaa;
cursor: pointer;
line-height:1;
padding: 0 5px;
font-weight: bold;
}
.tep-close-btn:hover {
color: #555;
}
`);
document.getElementById('tep-extract-button').addEventListener('click', handleExtract);
// 新增：触发按钮的事件监听
const tepTriggerButton = document.getElementById('tep-trigger-button');
const tepPanel = document.getElementById('text-extractor-panel');
if (tepTriggerButton && tepPanel) {
tepTriggerButton.addEventListener('click', () => {
tepPanel.classList.remove('tep-hidden');
tepPanel.classList.add('tep-visible');
// 可选: 点击后隐藏触发按钮自身
// tepTriggerButton.style.display = 'none';
});
}
// 新增：关闭按钮的事件监听
const tepCloseButton = document.getElementById('tep-close-button');
if (tepCloseButton && tepPanel) { // tepPanel 已经获取过了，可以复用
tepCloseButton.addEventListener('click', () => {
tepPanel.classList.remove('tep-visible');
tepPanel.classList.add('tep-hidden');
// 可选: 如果触发按钮被隐藏了，在这里重新显示它
// if (tepTriggerButton) tepTriggerButton.style.display = 'block';
});
}
// 新增：输入框Tab键处理
const selectorInputField = document.getElementById('tep-selector-input'); // 复用或确保已获取
if (selectorInputField) {
selectorInputField.addEventListener('focus', function() {
loadSelectorHistory();
currentHistoryIndex = -1;
originalInputValueBeforeNav = this.value;
});
selectorInputField.addEventListener('input', function() {
currentHistoryIndex = -1; // 用户手动输入，重置历史导航
originalInputValueBeforeNav = this.value; // 实时更新原始输入
});
selectorInputField.addEventListener('keydown', function(event) {
const valueBeforeKeydown = this.value; // 在按键处理前记录当前值
if (event.key === 'ArrowUp' || event.key === 'ArrowDown') {
event.preventDefault();
loadSelectorHistory(); // 确保使用最新的历史记录
if (selectorHistory.length === 0) return; // 没有历史则不进行任何操作
// 如果是首次开始导航 (之前 currentHistoryIndex 为 -1)
// 则将按键前的输入框内容保存为 originalInputValueBeforeNav
if (currentHistoryIndex === -1) {
originalInputValueBeforeNav = valueBeforeKeydown;
}
if (event.key === 'ArrowUp') {
if (currentHistoryIndex === -1) { // 从当前输入开始向上导航
currentHistoryIndex = 0; // 指向最新的历史记录 (index 0)
} else if (currentHistoryIndex < selectorHistory.length - 1) {
currentHistoryIndex++; // 移动到更早的历史记录 (index增加)
}
// 只有在 currentHistoryIndex 有效时才更新输入框
if (currentHistoryIndex >= 0 && currentHistoryIndex < selectorHistory.length) {
this.value = selectorHistory[currentHistoryIndex];
}
} else if (event.key === 'ArrowDown') {
if (currentHistoryIndex === -1) {
// 如果未在导航状态（例如，直接按了向下键），则不进行任何操作
return;
} else if (currentHistoryIndex > 0) {
currentHistoryIndex--; // 移动到较新的历史记录 (index减少)
this.value = selectorHistory[currentHistoryIndex];
} else if (currentHistoryIndex === 0) { // 当前是最新的历史记录 (index 0)
currentHistoryIndex = -1; // 退出导航，恢复原始输入
this.value = originalInputValueBeforeNav;
}
}
} else if (event.key === 'Escape') {
if (currentHistoryIndex !== -1) { // 如果正在导航历史
this.value = originalInputValueBeforeNav; // 恢复原始输入
currentHistoryIndex = -1; // 退出导航状态
event.preventDefault(); // 阻止可能的其他 Escape 行为
}
} else if (event.key === 'Tab') {
if (this.value.trim() === '') { // Tab键且输入框为空
event.preventDefault();
this.value = DEFAULT_SELECTOR_ON_TAB;
}
currentHistoryIndex = -1; // Tab后，无论是否填充，都重置导航状态
}
// 对于其他按键（如字母、数字、删除等），`input`事件处理器已处理currentHistoryIndex的重置
});
}
}
function handleExtract() {
const selectorInput = document.getElementById('tep-selector-input');
const statusDiv = document.getElementById('tep-status');
const selector = selectorInput.value.trim();
saveSelectorToHistory(selector); // 在获取选择器后立即保存
statusDiv.textContent = ''; // 清空状态
statusDiv.className = 'tep-status-message'; // 重置样式
if (!selector) {
statusDiv.textContent = '请输入CSS选择器!';
statusDiv.classList.add('tep-status-error');
selectorInput.focus();
return;
}
try {
const elements = document.querySelectorAll(selector);
if (elements.length === 0) {
statusDiv.textContent = `未找到匹配 "${selector}" 的元素。`;
statusDiv.classList.add('tep-status-error');
return;
}
let csvRows = [];
// 添加表头
csvRows.push(escapeCsvCell(DEFAULT_HEADER));
elements.forEach(el => {
const textContent = el.textContent || ''; // 获取文本内容，处理 null 的情况
csvRows.push(escapeCsvCell(textContent));
});
const csvString = csvRows.join('\n');
const timestamp = new Date().toISOString().replace(/[:.-]/g, '').slice(0, -4); // YYYYMMDDTHHMMSS
const filename = `${FILENAME_PREFIX}${timestamp}.csv`;
downloadCsv(csvString, filename);
statusDiv.textContent = `成功提取 ${elements.length} 条文本并开始下载 ${filename}`;
statusDiv.classList.add('tep-status-success');
} catch (error) {
console.error("提取错误:", error);
statusDiv.textContent = `提取失败: ${error.message}. 请检查选择器是否有效。`;
statusDiv.classList.add('tep-status-error');
}
}
// --- 初始化 ---
if (document.readyState === "complete" || document.readyState === "interactive") {
createUI();
} else {
window.addEventListener('DOMContentLoaded', createUI);
}
})();