// ==UserScript==
// @name         GreasyFork Media Preview
// @author       NWP
// @description  Automatically show media previews (video, audio, images, gifs) on GreasyFork links. It supports: .mp3, .wav, .flac, .aac, .ogg, .m4a, .wma, .alac, .aiff, .amr, .mp4, .webm, .ogv, .avi, .mov, .mkv, .flv, .wmv, .m4v, .3gp, .jpg, .jpeg, .png, .bmp, .svg, .gif, .apng, .webp
// @namespace    https://greasyfork.org/users/877912
// @version      0.1
// @license      MIT
// @match        *://greasyfork.org/*
// @grant        none
// ==/UserScript==
(function() {
'use strict';
const audioFormats = ['.mp3', '.wav', '.flac', '.aac', '.ogg', '.m4a', '.wma', '.alac', '.aiff', '.amr'];
const videoFormats = ['.mp4', '.webm', '.ogv', '.avi', '.mov', '.mkv', '.flv', '.wmv', '.m4v', '.3gp'];
const imageFormats = ['.jpg', '.jpeg', '.png', '.bmp', '.svg'];
const gifFormats = ['.gif', '.apng', '.webp'];
function createMediaElement(url) {
let media;
if (audioFormats.some(format => url.endsWith(format))) {
media = document.createElement('audio');
media.src = url;
media.controls = true;
media.autoplay = false;
media.loop = true;
media.muted = false;
media.classList.add('added-by-script');
} else if (videoFormats.some(format => url.endsWith(format))) {
media = document.createElement('video');
media.src = url;
media.style.width = '20rem';
media.style.height = '15rem';
media.controls = true;
media.autoplay = false;
media.loop = true;
media.muted = false;
media.classList.add('added-by-script');
} else if (gifFormats.some(format => url.endsWith(format))) {
media = document.createElement('div');
media.style.display = 'flex';
media.style.flexDirection = 'column';
media.style.alignItems = 'flex-start';
media.style.width = '20rem';
media.style.height = 'auto';
media.style.marginBottom = '0.625rem';
const img = document.createElement('img');
img.src = url;
img.style.width = '20rem';
img.style.height = '15rem';
img.classList.add('added-by-script');
img.dataset.pausedSrc = url;
img.dataset.playing = 'false';
img.style.display = 'none';
const canvas = document.createElement('canvas');
canvas.style.width = '20rem';
canvas.style.height = '15rem';
media.appendChild(canvas);
const ctx = canvas.getContext('2d');
const gif = new Image();
gif.src = url;
gif.onload = function() {
ctx.drawImage(gif, 0, 0, canvas.width, canvas.height);
};
const playButton = document.createElement('button');
playButton.innerText = 'Play';
playButton.style.display = 'block';
playButton.style.marginTop = '0.625rem';
playButton.style.alignSelf = 'flex-start';
playButton.onclick = function(event) {
event.preventDefault();
if (img.dataset.playing === 'true') {
img.style.display = 'none';
canvas.style.display = 'block';
img.dataset.playing = 'false';
playButton.innerText = 'Play';
} else {
img.style.display = 'block';
canvas.style.display = 'none';
img.dataset.playing = 'true';
playButton.innerText = 'Stop';
}
};
media.appendChild(img);
media.appendChild(playButton);
media.classList.add('added-by-script');
} else if (imageFormats.some(format => url.endsWith(format))) {
media = document.createElement('img');
media.src = url;
media.style.width = '20rem';
media.style.height = '15rem';
media.classList.add('added-by-script');
}
return media;
}
function showMediaPreviews(container) {
const mediaLinks = container.querySelectorAll(
audioFormats.map(format => `a[href$="${format}"]`)
.concat(videoFormats.map(format => `a[href$="${format}"]`))
.concat(imageFormats.map(format => `a[href$="${format}"]`))
.concat(gifFormats.map(format => `a[href$="${format}"]`))
.join(', ')
);
mediaLinks.forEach(link => {
if (!link.dataset.processed) {
const media = createMediaElement(link.href);
if (media) {
const paragraph = document.createElement('p');
paragraph.appendChild(media);
link.parentNode.insertBefore(paragraph, link.nextSibling);
link.dataset.processed = 'true';
}
}
});
}
function initializeMediaPreviews() {
const additionalInfo = document.querySelector('#additional-info');
if (additionalInfo) {
showMediaPreviews(additionalInfo);
}
const previewR###lts = document.querySelectorAll('.preview-r###lts.user-content[style*="display: block"]');
previewR###lts.forEach(container => {
showMediaPreviews(container);
});
}
window.onload = function() {
initializeMediaPreviews();
};
const observer = new MutationObserver((mutations) => {
mutations.forEach(mutation => {
if (mutation.attributeName === 'style' && mutation.target.style.display === 'block') {
showMediaPreviews(mutation.target);
}
});
});
document.querySelectorAll('.preview-r###lts.user-content').forEach(container => {
observer.observe(container, { attributes: true, attributeFilter: ['style'] });
});
})();