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Image magnifier for Twitter/X. Hold hotkey Ctrl+Alt to activate, press any key to disable. Hover over images to view them with magnifying glass. Features adjustable size, zoom level, and scroll wheel zoom control.
// ==UserScript==
// @name Twitter Image Magnifying Glass
// @namespace http://tampermonkey.net/
// @version 2
// @description Image magnifier for Twitter/X. Hold hotkey Ctrl+Alt to activate, press any key to disable. Hover over images to view them with magnifying glass. Features adjustable size, zoom level, and scroll wheel zoom control.
// @author You
// @match https://twitter.com/*
// @match https://x.com/*
// @icon data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyNCIgaGVpZ2h0PSIyNCIgdmlld0JveD0iMCAwIDI0IDI0IiBmaWxsPSJub25lIiBzdHJva2U9IiMwMDAiIHN0cm9rZS13aWR0aD0iMiIgc3Ryb2tlLWxpbmVjYXA9InJvdW5kIiBzdHJva2UtbGluZWpvaW49InJvdW5kIj48Y2lyY2xlIGN4PSIxMSIgY3k9IjExIiByPSI4Ii8+PHBhdGggZD0ibTIxIDIxLTQuMzUtNC4zNSIvPjwvc3ZnPg==
// @license MIT
// @run-at document-end
// @grant GM_getValue
// @grant GM_setValue
// @grant GM_registerMenuCommand
// ==/UserScript==
(function() {
'use strict';
// State variables
let magnifier = null;
let currentImage = null;
let magnifierActive = false;
// Load saved settings
let savedHotkey = GM_getValue('magnifier_hotkey', 'ctrl+alt');
let savedSize = GM_getValue('magnifier_size', 200);
let savedZoom = GM_getValue('magnifier_zoom', 3);
// Utility functions
const createSliderModal = (title, icon, currentValue, unit, min, max, step, tickStep, majorTickStep) => {
const overlay = document.createElement('div');
overlay.style.cssText = `
position: fixed; top: 0; left: 0; width: 100%; height: 100%;
background: rgba(0,0,0,0.8); z-index: 999999; display: flex;
align-items: center; justify-content: center; font-family: Arial, sans-serif;
`;
overlay.innerHTML = `
<div style="background: white; padding: 30px; border-radius: 10px; box-shadow: 0 10px 30px rgba(0,0,0,0.5); max-width: 400px; width: 90%;">
<h3 style="margin: 0 0 20px 0; text-align: center; color: #333;">${icon} ${title}</h3>
<div style="margin-bottom: 20px;">
<label style="display: block; margin-bottom: 10px; color: #555; font-weight: bold;">
${title.split(' ')[1]}: <span id="valueDisplay">${currentValue}</span>${unit}
</label>
<div style="position: relative;">
<input type="range" id="slider" min="${min}" max="${max}" step="${step}" value="${currentValue}"
style="width: 100%; height: 8px; border-radius: 5px; background: #ddd; outline: none;">
<div id="ticks" style="position: relative; height: 20px; margin-top: 5px;"></div>
</div>
</div>
<div style="margin-bottom: 20px; font-size: 12px; color: #666; text-align: center;">
Click tick marks for quick ${title.toLowerCase()} • ${min}${unit} to ${max}${unit}
</div>
<div style="display: flex; gap: 10px; justify-content: center;">
<button id="save" style="background: #1da1f2; color: white; border: none; padding: 12px 24px; border-radius: 6px; cursor: pointer; font-size: 14px;">Save</button>
<button id="cancel" style="background: #ccc; color: #333; border: none; padding: 12px 24px; border-radius: 6px; cursor: pointer; font-size: 14px;">Cancel</button>
</div>
</div>
`;
document.body.appendChild(overlay);
const slider = overlay.querySelector('#slider');
const valueDisplay = overlay.querySelector('#valueDisplay');
const ticksContainer = overlay.querySelector('#ticks');
// Create ticks
for (let i = min; i <= max; i += tickStep) {
const position = ((i - min) / (max - min)) * 100;
const isMajor = majorTickStep && i % majorTickStep === 0;
const isWhole = tickStep >= 1 ? true : i % 1 === 0;
const tick = document.createElement('div');
tick.style.cssText = `
position: absolute; left: ${position}%; top: 0; width: 2px;
height: ${isMajor ? '12px' : isWhole ? '10px' : '6px'};
background: ${isMajor ? '#666' : isWhole ? '#666' : '#bbb'};
cursor: pointer; transform: translateX(-50%);
`;
tick.addEventListener('click', () => { slider.value = i; valueDisplay.textContent = i; });
ticksContainer.appendChild(tick);
// Add labels for major ticks
if (isMajor && (i === min || i % majorTickStep === 0)) {
const label = document.createElement('div');
label.style.cssText = `
position: absolute; left: ${position}%; top: 14px; font-size: 10px;
color: #666; transform: translateX(-50%); cursor: pointer;
`;
label.textContent = i + unit;
label.addEventListener('click', () => { slider.value = i; valueDisplay.textContent = i; });
ticksContainer.appendChild(label);
}
}
slider.addEventListener('input', () => valueDisplay.textContent = slider.value);
overlay.addEventListener('click', (e) => { if (e.target === overlay) document.body.removeChild(overlay); });
return { overlay, slider, saveBtn: overlay.querySelector('#save'), cancelBtn: overlay.querySelector('#cancel') };
};
// Menu commands
GM_registerMenuCommand('Configure Hotkey', () => {
const validKeys = ['alt', 'ctrl', 'shift', 'ctrl+alt', 'ctrl+shift', 'alt+shift'];
let input, error = false;
do {
input = prompt(`Enter magnifier activation hotkey:${error ? '\n\n❌ INVALID INPUT! Please use one of the options below.' : ''}\n\n📋 Valid options:\n• ${validKeys.join('\n• ')}\n\nCurrent hotkey: ${savedHotkey}`, savedHotkey);
if (input === null) return;
input = input.trim().toLowerCase();
error = !validKeys.includes(input);
} while (error);
savedHotkey = input;
GM_setValue('magnifier_hotkey', savedHotkey);
alert(`✅ Hotkey set to: ${savedHotkey.toUpperCase().replace('+', ' + ')}\n\nPlease refresh the page for changes to take effect.`);
});
GM_registerMenuCommand('Configure Size', () => {
const { overlay, slider, saveBtn, cancelBtn } = createSliderModal('Magnifier Size', '🔍', savedSize, 'px', 50, 2000, 1, 50, 200);
saveBtn.addEventListener('click', () => {
savedSize = parseInt(slider.value);
GM_setValue('magnifier_size', savedSize);
document.body.removeChild(overlay);
alert(`✅ Magnifier size set to: ${savedSize}px\n\nPlease refresh the page for changes to take effect.`);
});
cancelBtn.addEventListener('click', () => document.body.removeChild(overlay));
});
GM_registerMenuCommand('Configure Zoom', () => {
const { overlay, slider, saveBtn, cancelBtn } = createSliderModal('Zoom Level', '🔎', savedZoom, 'x', 1, 20, 0.5, 0.5, 2);
saveBtn.addEventListener('click', () => {
savedZoom = parseFloat(slider.value);
GM_setValue('magnifier_zoom', savedZoom);
document.body.removeChild(overlay);
alert(`✅ Zoom level set to: ${savedZoom}x\n\nPlease refresh the page for changes to take effect.`);
});
cancelBtn.addEventListener('click', () => document.body.removeChild(overlay));
});
// Parse hotkey settings
const keySettings = (() => {
const keyMap = {
'alt': { alt: true, ctrl: false, shift: false },
'ctrl': { alt: false, ctrl: true, shift: false },
'shift': { alt: false, ctrl: false, shift: true },
'ctrl+alt': { alt: true, ctrl: true, shift: false },
'ctrl+shift': { alt: false, ctrl: true, shift: true },
'alt+shift': { alt: true, ctrl: false, shift: true }
};
return keyMap[savedHotkey] || { alt: true, ctrl: true, shift: false };
})();
// Core functions
const createMagnifier = () => {
const mag = document.createElement('div');
mag.id = 'image-magnifier';
mag.style.cssText = `
position: fixed; width: ${savedSize}px; height: ${savedSize}px;
border: 3px solid #000; border-radius: 50%; background: #fff;
background-repeat: no-repeat; box-shadow: 0 0 20px rgba(0,0,0,0.5);
pointer-events: none; z-index: 10000; display: none; transition: opacity 0.1s ease;
`;
document.body.appendChild(mag);
return mag;
};
const updateMagnifier = (e, img) => {
if (!magnifier || !img) return;
const rect = img.getBoundingClientRect();
const x = e.clientX - rect.left, y = e.clientY - rect.top;
const magSize = savedSize / 2;
// Use natural dimensions for proper aspect ratio
const bgWidth = (img.naturalWidth || rect.width) * savedZoom;
const bgHeight = (img.naturalHeight || rect.height) * savedZoom;
// Calculate scale factors to map mouse position correctly
const scaleX = bgWidth / rect.width;
const scaleY = bgHeight / rect.height;
magnifier.style.backgroundImage = `url('${img.src}')`;
magnifier.style.backgroundSize = `${bgWidth}px ${bgHeight}px`;
magnifier.style.backgroundPosition = `${-((x * scaleX) - magSize)}px ${-((y * scaleY) - magSize)}px`;
magnifier.style.left = `${e.clientX - magSize}px`;
magnifier.style.top = `${e.clientY - magSize}px`;
magnifier.style.display = 'block';
};
const hideMagnifier = () => {
if (magnifier) {
magnifier.style.display = 'none';
}
};
const isImage = (el) => {
if (!el) return false;
if (el.tagName === 'IMG') return true;
if (el.style?.backgroundImage && el.style.backgroundImage !== 'none') return true;
if (el.getAttribute('data-testid') === 'tweetPhoto') return true;
if (el.classList.contains('css-9pa8cd')) return true;
if (el.querySelector('img')) return true;
return false;
};
const isActivationKeyPressed = (e) => e.altKey === keySettings.alt && e.ctrlKey === keySettings.ctrl && e.shiftKey === keySettings.shift;
// Event listeners
document.addEventListener('keydown', (e) => {
if (isActivationKeyPressed(e) && !magnifierActive) {
magnifierActive = true;
if (!magnifier) magnifier = createMagnifier();
} else if (magnifierActive && !isActivationKeyPressed(e)) {
magnifierActive = false;
currentImage = null;
hideMagnifier();
}
}, { passive: true });
document.addEventListener('click', (e) => {
if (magnifierActive) {
magnifierActive = false;
currentImage = null;
hideMagnifier();
}
}, { passive: true });
document.addEventListener('mousemove', (e) => {
if (!magnifierActive) return;
const target = e.target;
if (isImage(target)) {
currentImage = target;
updateMagnifier(e, target);
} else {
currentImage = null;
hideMagnifier();
}
});
document.addEventListener('mouseleave', () => {
if (magnifierActive) {
currentImage = null;
hideMagnifier();
}
}, { passive: true });
document.addEventListener('wheel', (e) => {
if (!magnifierActive || !currentImage) return;
e.preventDefault();
e.stopPropagation();
savedZoom = Math.max(0.1, Math.min(20, savedZoom + (e.deltaY > 0 ? -0.1 : 0.1)));
GM_setValue('magnifier_zoom', savedZoom);
updateMagnifier(e, currentImage);
// Show zoom indicator
let indicator = document.getElementById('zoomIndicator');
if (!indicator) {
indicator = document.createElement('div');
indicator.id = 'zoomIndicator';
indicator.style.cssText = `
position: fixed; top: 20px; right: 20px; background: rgba(0,0,0,0.8);
color: white; padding: 8px 12px; border-radius: 4px; font-family: Arial, sans-serif;
font-size: 14px; z-index: 10001; pointer-events: none; will-change: opacity;
`;
document.body.appendChild(indicator);
}
indicator.textContent = `Zoom: ${savedZoom.toFixed(1)}x`;
indicator.style.display = 'block';
clearTimeout(window.zoomIndicatorTimeout);
window.zoomIndicatorTimeout = setTimeout(() => indicator.style.display = 'none', 1000);
}, { passive: false });
// Load message
console.log(`🔍 Twitter Image Magnifier loaded! Press ${savedHotkey.toUpperCase().replace('+', ' + ')} to activate.`);
console.log(`💡 Works on Twitter/X images. Right-click Tampermonkey icon → Configure settings.`);
console.log(`🎯 Scroll wheel adjusts zoom when magnifier is active.`);
})();