Use grid wallpaper to highlight transparent image. Support to view the large image by holding the right mouse and drag.
// ==UserScript==
// @name Image viewer
// @name:vi Image viewer
// @namespace http://devs.forumvi.com/
// @description Use grid wallpaper to highlight transparent image. Support to view the large image by holding the right mouse and drag.
// @description:vi Sử dụng nền lưới để làm nổi bật ảnh trong suốt. Hỗ trợ xem ảnh lớn bằng cách giữ và kéo chuột phải.
// @version 2.3.0
// @icon http://i.imgur.com/ItcjCPc.png
// @author Zzbaivong
// @oujs:author baivong
// @license MIT; https://baivong.mit-license.org/license.txt
// @match http://*/*
// @match https://*/*
// @require https://greasemonkey.github.io/gm4-polyfill/gm4-polyfill.js?v=a834d46
// @noframes
// @supportURL https://github.com/lelinhtinh/Userscript/issues
// @run-at document-idle
// @grant GM_addStyle
// @grant GM_xmlhttpRequest
// @grant GM.xmlHttpRequest
// @inject-into content
// ==/UserScript==
(function () {
'use strict';
/**
* Background theme
* @type {'system'|'dark'|'light'}
*/
let theme = 'system';
// Do not change the code below this line, unless you know how.
if (document.contentType.indexOf('image/') !== 0) return;
if (theme === 'system') {
theme = window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
}
let colorGrid = theme === 'light' ? ['#eee', 'white'] : ['gray', '#444'];
function scrollByDragging(container, disableH, disableV) {
function mouseUp(e) {
if (e.which !== 3) return;
window.removeEventListener('mousemove', mouseMove, true);
container.style.cursor = 'default';
}
function mouseDown(e) {
if (e.which !== 3) return;
pos = {
x: e.clientX,
y: e.clientY,
};
window.addEventListener('mousemove', mouseMove, true);
container.style.cursor = 'move';
}
function mouseMove(e) {
if (!disableH) container.scrollLeft -= -pos.x + (pos.x = e.clientX);
if (!disableV) container.scrollTop -= -pos.y + (pos.y = e.clientY);
}
let pos = {
x: 0,
y: 0,
};
container.oncontextmenu = function (e) {
e.preventDefault();
};
container.addEventListener('mousedown', mouseDown, false);
window.addEventListener('mouseup', mouseUp, false);
}
function updateImageInfo() {
let img = document.querySelector('img');
if (!img) return;
let info = document.querySelector('.image-info');
if (!info) {
info = document.createElement('div');
info.className = 'image-info';
document.body.appendChild(info);
}
info.innerHTML = `
<div class="image-info-title">
<div class="image-info-ext">${imageInfo.ext.toUpperCase()}</div>
<div class="image-info-size">${imageInfo.size}</div>
</div>
<div class="image-info-dimensions">${imageInfo.dimensions}</div>
`;
}
function formatBytes(bytes, decimals = 2) {
if (bytes === 0) return '0 Bytes';
const k = 1024;
const dm = decimals < 0 ? 0 : decimals;
const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
const i = Math.floor(Math.log(bytes) / Math.log(k));
return `${parseFloat((bytes / Math.pow(k, i)).toFixed(dm))} <strong>${sizes[i]}</strong>`;
}
GM_addStyle(
`html,body{width:100%;height:100%;margin:0;padding:0}
body,svg:root{background-attachment:fixed!important;background-position:0 0, 10px 10px !important;background-size:20px 20px!important;background-image:linear-gradient(45deg, ${colorGrid[0]} 25%,transparent 25%, transparent 75%,${colorGrid[0]} 75%,${colorGrid[0]} 100%),linear-gradient(45deg, ${colorGrid[0]} 25%,${colorGrid[1]} 25%,${colorGrid[1]} 75%,${colorGrid[0]} 75%,${colorGrid[0]} 100%)!important;display:flex;align-content:center;justify-content:center}
body > img{background-color:transparent!important;background-image:none!important;display:block;position:initial}
body > img:hover{background:rgba(0,0,0,0.4)!important;outline:3px solid #333}
body > img[style*="cursor: zoom-out;"],body > img.overflowing{position:relative!important}
.image-info{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,"Fira Sans","Droid Sans","Helvetica Neue",Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";color:#fff;background:#000000b8;text-align:center;text-shadow:1px 1px 2px #444,1px 1px 2px #444;border-radius:.2rem;padding:.4rem .7rem;width:fit-content;position:fixed;bottom:10%;left:50%;transform:translateX(-50%);opacity:1;transition:opacity 200ms;user-select:none}
.image-info-title{display:flex;justify-content:space-evenly;flex-wrap:nowrap;gap:.5rem}
.image-info:hover{opacity:0}
.image-info-ext{font-weight:700}`,
);
if (document.contentType === 'image/svg+xml') return;
scrollByDragging(document.documentElement);
const imageInfo = {
ext: '',
size: '',
dimensions: '',
};
let imageExt = document.contentType.split('/')[1];
if (imageExt === 'svg+xml') imageExt = 'svg';
if (imageExt === 'x-icon' || imageExt === 'vnd.microsoft.icon') imageExt = 'ico';
imageInfo.ext = imageExt;
let imageDimensions = document.title.match(/\(([A-Z]{3,4} Image,\s*)?\s*([0-9]+\s*(x|×)\s*[0-9]+)\s*(\pixels\s*)?/);
if (imageDimensions) imageDimensions = imageDimensions[2];
imageInfo.dimensions = imageDimensions;
updateImageInfo();
GM.xmlHttpRequest({
method: 'GET',
url: location.href,
responseType: 'arraybuffer',
onload: function (response) {
imageInfo.dimensions = `${document.images[0].naturalWidth}×${document.images[0].naturalHeight}`;
const imageSize = response.response.byteLength;
imageInfo.size = formatBytes(imageSize);
updateImageInfo();
},
});
})();