全屏以大号字体显示选中的文本。快捷键(默认Alt+D,可自定义)触发。按Esc或点击蒙版退出。
// ==UserScript==
// @name Large Type Display
// @namespace http://googleyixia.com/
// @version 1.1.3
// @description 全屏以大号字体显示选中的文本。快捷键(默认Alt+D,可自定义)触发。按Esc或点击蒙版退出。
// @author Byron (and AI assistant)
// @match *://*/*
// @icon data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><text y=".9em" font-size="90">Aa</text></svg>
// @grant GM_addStyle
// @grant GM_setValue
// @grant GM_getValue
// @grant GM_registerMenuCommand
// @run-at document-idle
// @license CC BY-NC-SA 4.0
// ==/UserScript==
(function() {
'use_strict';
let overlayElement = null;
let currentShortcutKey = 'D';
const MODIFIER_KEY = 'altKey';
const MIN_FONT_SIZE_PX = 42; // <-- 最小字体大小更新为 42px
// 样式
GM_addStyle(`
.large-type-overlay {
position: fixed;
top: 0;
left: 0;
width: 100vw;
height: 100vh;
background-color: rgba(0, 0, 0, 0.75);
display: flex;
justify-content: center;
align-items: center;
z-index: 2147483647;
opacity: 0;
visibility: hidden;
transition: opacity 0.2s ease-in-out, visibility 0.2s ease-in-out;
padding: 20px;
box-sizing: border-box;
}
.large-type-overlay.visible {
opacity: 1;
visibility: visible;
}
.large-type-text {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
color: white;
text-align: center;
line-height: 1.5; /* <-- 行间距从 1.2 增加到 1.5 */
text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
max-width: 90%;
overflow-wrap: break-word;
word-wrap: break-word;
overflow-y: auto;
max-height: calc(100vh - 80px);
}
.large-type-text span {
word-break: break-all;
}
`);
function getSelectedText() {
let text = "";
if (window.getSelection) {
text = window.getSelection().toString();
} else if (document.selection && document.selection.type != "Control") {
text = document.selection.createRange().text;
}
return text.trim();
}
function createOverlay() {
overlayElement = document.createElement('div');
overlayElement.id = 'large-type-overlay-container';
overlayElement.className = 'large-type-overlay';
const textElement = document.createElement('div');
textElement.className = 'large-type-text';
textElement.id = 'large-type-content';
overlayElement.appendChild(textElement);
document.body.appendChild(overlayElement);
overlayElement.addEventListener('click', function(event) {
if (event.target === overlayElement) {
hideLargeType();
}
});
}
function showLargeType(textToShow) {
const selectedText = textToShow;
if (!selectedText) {
return;
}
if (!overlayElement) {
createOverlay();
}
const textContentElement = overlayElement.querySelector('#large-type-content');
textContentElement.innerHTML = '';
const span = document.createElement('span');
span.textContent = selectedText;
textContentElement.appendChild(span);
const viewportWidth = window.innerWidth;
const viewportHeight = window.innerHeight;
const textLength = selectedText.length;
const overlayPaddingTotal = 40;
const textContainerMaxWidth = (viewportWidth - overlayPaddingTotal) * 0.9;
const textContainerMaxHeight = viewportHeight - overlayPaddingTotal;
const targetRenderWidth = textContainerMaxWidth * 0.98;
const targetRenderHeight = textContainerMaxHeight * 0.95;
let fontSizePx;
if (textLength <= 15) {
let initialSizeByHeight = targetRenderHeight * 0.7;
if (textLength === 1) initialSizeByHeight = targetRenderHeight * 0.8;
else if (textLength <= 3) initialSizeByHeight = targetRenderHeight * 0.75;
let initialSizeByWidth = targetRenderWidth / (Math.max(1, textLength) * 0.55);
fontSizePx = Math.min(initialSizeByHeight, initialSizeByWidth);
} else {
let initialVwEquivalent = 8; // 对于较长文本，此基准可能需要配合新的最小字号进行观察调整
if (textLength < 30) initialVwEquivalent = 10;
else if (textLength < 60) initialVwEquivalent = 8;
else if (textLength < 100) initialVwEquivalent = 7;
else initialVwEquivalent = 6;
fontSizePx = (initialVwEquivalent / 100) * viewportWidth;
}
fontSizePx = Math.max(MIN_FONT_SIZE_PX, Math.min(fontSizePx, viewportHeight * 0.85));
textContentElement.style.fontSize = fontSizePx + 'px';
let loops = 0;
const maxLoops = 100;
while (loops < maxLoops && (textContentElement.scrollWidth > targetRenderWidth || textContentElement.scrollHeight > targetRenderHeight)) {
fontSizePx -= Math.max(1, fontSizePx * 0.05);
if (fontSizePx < MIN_FONT_SIZE_PX) {
fontSizePx = MIN_FONT_SIZE_PX;
textContentElement.style.fontSize = fontSizePx + 'px';
break;
}
textContentElement.style.fontSize = fontSizePx + 'px';
loops++;
}
overlayElement.classList.add('visible');
document.addEventListener('keydown', handleEscapeKey);
}
function hideLargeType() {
if (overlayElement) {
if (overlayElement.classList.contains('visible')) {
overlayElement.classList.remove('visible');
setTimeout(() => {
if (overlayElement) {
overlayElement.remove();
overlayElement = null;
}
}, 200);
} else {
overlayElement.remove();
overlayElement = null;
}
document.removeEventListener('keydown', handleEscapeKey);
}
}
function handleEscapeKey(event) {
if (event.key === "Escape") {
hideLargeType();
}
}
function handleShortcut(event) {
if (event[MODIFIER_KEY] && event.code === 'Key' + currentShortcutKey.toUpperCase() && !event.ctrlKey && !event.shiftKey && !event.metaKey) {
event.preventDefault();
event.stopImmediatePropagation();
const selectedText = getSelectedText();
if (selectedText) {
showLargeType(selectedText);
}
}
}
async function loadShortcut() {
currentShortcutKey = await GM_getValue('largeTypeShortcutKey', 'D');
}
async function saveShortcut(key) {
await GM_setValue('largeTypeShortcutKey', key);
currentShortcutKey = key;
alert(`快捷键已设置为: Alt + ${currentShortcutKey.toUpperCase()}`);
}
function changeShortcut() {
const newKey = prompt(`请输入新的快捷键字母 (例如 D, L, M)，当前为 Alt + ${currentShortcutKey.toUpperCase()}:`, currentShortcutKey);
if (newKey && newKey.trim().length === 1 && /^[a-zA-Z]$/.test(newKey.trim())) {
saveShortcut(newKey.trim().toUpperCase());
} else if (newKey !== null) {
alert("无效的按键。请输入单个字母。");
}
}
async function init() {
await loadShortcut();
document.addEventListener('keydown', handleShortcut, true);
GM_registerMenuCommand("设置 大号文本显示 快捷键", changeShortcut, "L");
}
init();
})();