18h.mm-cg.com Image Viewer

Image viewer for content pages, RIGHT or SPACE for the next image, LEFT for previous image.

As of 2022-11-18. See the latest version.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @namespace http://xorcerer.github.io/
// @name     18h.mm-cg.com Image Viewer
// @version  1
// @grant    none
// @description Image viewer for content pages, RIGHT or SPACE for the next image, LEFT for previous image.
// @match https://18h.mm-cg.com/*/content.html
// @license MIT
// ==/UserScript==

function addGlobalStyle(css) {
    var head, style;
    head = document.getElementsByTagName('head')[0];
    if (!head) { return; }
    style = document.createElement('style');
    style.type = 'text/css';
    style.innerHTML = css;
    head.appendChild(style);
}

addGlobalStyle(`
 /* The Overlay (background) */
.overlay {
  /* Height & width depends on how you want to reveal the overlay (see JS below) */   
  height: 100vh;
  width: 100vw;
  position: fixed; /* Stay in place */
  z-index: 1; /* Sit on top */
  left: 0;
  top: 0;
  background-color: rgb(0,0,0); /* Black fallback color */
  background-color: rgba(0,0,0, 0.9); /* Black w/opacity */
  overflow-x: hidden; /* Disable horizontal scroll */
}

/* Position the content inside the overlay */
.overlay-content {
  position: relative;
  width: 100%; /* 100% width */
  text-align: center; /* Centered text/links */
}

/* The navigation links inside the overlay */
.overlay-content img {
  height: 100vh;
  width: 100vw;
	object-fit:contain;
}
`);


var markup = document.documentElement.innerHTML;
var urlRe = /Large_cgurl\[\d+\] = "(.+)";/g;
var pics = [];
var cache = [];

for (const match of markup.matchAll(urlRe)) {
  var src = match[1];
  pics.push(src);
	var i = new Image();
  i.src = src;
  cache.push(i);
}


var d = document.createElement('div');
d.classList.add('overlay');

dc = document.createElement('div');
dc.classList.add('overlay-content');
d.appendChild(dc);

var i = document.createElement('img');
i.src = pics[0];
dc.appendChild(i);

document.body.innerHTML = '';
document.body.append(d);

var index = 0;
document.addEventListener('keyup', (e) => {
	var left = -1, right = 1;
		if (e.keyCode == 37) {
  			index -= 1;
				if (index == -1) index = pics.length - 1;
	      i.src = pics[index]; return false;
    } else if (e.keyCode == 39 || e.keyCode == 32) {
  			index += 1;
				if (index >= pics.length) index = 0;
	      i.src = pics[index]; return false;
    }
});