Simplifies the reader layout, adds a hotkey and preloads the next image. Inspired by Handy ExHentai, ExHentai - Preload next page, and G.E/EX Keyboard Navigation.
// ==UserScript==
// @name Improved EH Reader
// @namespace karoo
// @version 2023.10.30
// @description Simplifies the reader layout, adds a hotkey and preloads the next image. Inspired by Handy ExHentai, ExHentai - Preload next page, and G.E/EX Keyboard Navigation.
// @match *://e-hentai.org/s/*
// @match *://exhentai.org/s/*
// @run-at document-end
// @noframes
// ==/UserScript==
function id(id) {return document.getElementById(id);}
if (window.top !== window.self) {return;}
// hide top panel and front page link
id('i1').firstElementChild.style.display = 'none';
id('i2').style.display = 'none';
document.getElementsByClassName('dp')[0].style.display = 'none';
// hide frame and fix margins
id('i1').style.background = 'none';
id('i1').style.border = 'none';
id('i1').style.margin = '0px auto 0px';
// add extra hotkeys
document.addEventListener('keydown', function(e) {
// alt+right, next page if no future history
if (e.altKey && e.keyCode == '39') {
var currentUrl = window.location.href;
history.forward();
// if the url hasn't changed after 20ms, click next
setTimeout(function() {
if(currentUrl === window.location.href){
id('next').click();
}
}, 20);
e.preventDefault();
return;
}
// ignore further hotkeys if a modifier is held
if (e.shiftKey || e.ctrlKey || e.altKey || e.metaKey) {return;}
// q key, return to gallery
if (e.keyCode == '81') {
id('i5').firstElementChild.firstElementChild.click();
return;
}
// f key, search all galleries
if (e.keyCode == '70') {
var tagSearch = prompt('Search ' + document.location.hostname);
if (tagSearch !== null) {
window.location.href = '/?f_search=' + tagSearch;
}
return;
}
});
// insert script to continue preloading beyond initial userscript load
// lookahead http request used to avoid creating an iframe
// doesn't preload when opening pages in new tabs
var script = document.createElement('script');
script.type = 'text/javascript';
script.innerHTML = `
var preload = new Image();
function preloadNext() {
var href = document.getElementById('next').href;
if (history.length <= 1 || href == window.location.href) {return;}
var lookahead = new XMLHttpRequest();
lookahead.open('GET', href, true);
lookahead.onload = function(e) {
var doc = document.implementation.createHTMLDocument('lookahead');
doc.documentElement.innerHTML = lookahead.responseText;
var nextImage = doc.getElementById('img').src;
preload.src = nextImage;
}
lookahead.send();
}
var uweo = update_window_extents;
update_window_extents = function() {
uweo();
document.getElementById('img').addEventListener('load', preloadNext());
}`;
document.head.appendChild(script);
