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/*
* DOM Filter Copyright (C) 2024 Thedro Neely
* Licence: AGPL | https://www.gnu.org/licenses/agpl-3.0.txt
*/
(function () {
type millisecond = number;
const timeout: millisecond = 300;
const state = "on";
const key = "config.navigation.fast";
function fetch(url, method, callback) {
const http = new XMLHttpRequest();
http.onreadystatechange = function () {
if (callback && http.readyState === 4) {
if (http.status === 200) callback(http);
else {
console.error("ERROR: Unable to navigate", http);
self.location.href = url;
}
}
};
http.open(method, url);
http.timeout = timeout;
http.send();
return http;
}
function styles(node) {
return (node.nodeName === "LINK") && node.rel && node.rel.includes("stylesheet");
}
function scripts(node) {
return (node.nodeName === "SCRIPT") && node.hasAttribute("src");
}
function filter(url, http) {
let live = document;
let node = live.head.childNodes.length;
let next = (new DOMParser()).parseFromString(http.responseText, "text/html");
if (next.doctype === null || !http.getResponseHeader("content-type").includes("text/html")) return false;
while (node--) {
if (styles(live.head.childNodes[node]) || scripts(live.head.childNodes[node])) {
// console.log("INFO: Persist:", live.head.childNodes[node]);
} else {
live.head.removeChild(live.head.childNodes[node]);
}
}
while (next.head.firstChild) {
if (styles(next.head.firstChild) || scripts(next.head.firstChild)) {
next.head.removeChild(next.head.firstChild);
} else {
live.head.appendChild(next.head.firstChild);
}
}
while (live.documentElement.attributes.length > 0) {
live.documentElement.removeAttribute(
live.documentElement.attributes[live.documentElement.attributes.length - 1].name,
);
}
while (next.documentElement.attributes.length > 0) {
live.documentElement.setAttribute(
next.documentElement.attributes[next.documentElement.attributes.length - 1].name,
next.documentElement.attributes[next.documentElement.attributes.length - 1].value,
);
next.documentElement.removeAttribute(
next.documentElement.attributes[next.documentElement.attributes.length - 1].name,
);
}
live.body.parentElement.replaceChild(next.body, live.body);
}
function persist() {
let persist = document.createElement("link");
persist.rel = "location";
persist.target = JSON.stringify(self.location);
document.head.appendChild(persist);
}
self.addEventListener("DOMContentLoaded", function () {
if (localStorage[key] !== state) return;
persist();
});
self.addEventListener("popstate", function (event) {
if (localStorage[key] !== state) return;
const link = JSON.parse(document.querySelector('link[rel="location"]').target);
const url = event.target.location;
const hashed = link.pathname === url.pathname;
if (hashed) return;
fetch(url, "GET", function (http) {
if (filter(url, http) === false) return self.location.href = url;
persist();
self.document.dispatchEvent(new CustomEvent("URLChangedCustomEvent", { bubbles: true }));
});
});
self.addEventListener("click", function (event) {
if (localStorage[key] !== state) return;
const links = document.querySelectorAll("a");
for (let i = 0; i < links.length; i++) {
const active = links[i].contains(event.target);
const change = self.location.href !== links[i].href;
const view = links[i].attributes.hasOwnProperty("download") === false;
const local = self.location.origin === links[i].origin && links[i].target !== "_self";
const hashed = self.location.pathname === links[i].pathname && links[i].href.includes("#");
if (active && local && change && view && (hashed === false)) {
event.preventDefault();
const url = links[i].href;
links[i].style.cursor = "wait";
fetch(url, "GET", function (http) {
links[i].removeAttribute("style")
if (filter(url, http) === false) return self.location.href = url;
history.pushState({}, "", links[i].href);
persist();
self.document.dispatchEvent(new CustomEvent("URLChangedCustomEvent", { bubbles: true }));
});
}
}
});
})();
/*
* Copyright (C) 2024 Thedro Neely
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
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