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Support 2019 new UI Twitter only.
// ==UserScript==
// @name Zoom In Twitter Image
// @version 1.0.8
// @description Support 2019 new UI Twitter only.
// @author Hayao-Gai
// @namespace https://github.com/HayaoGai
// @icon https://i.imgur.com/M9oO8K9.png
// @include https://twitter.com/*
// @require http://code.jquery.com/jquery-3.4.1.slim.min.js
// @grant none
// ==/UserScript==
(function() {
'use strict';
const $ = window.jQuery;
const urlLoad = "https://i.imgur.com/hXeIJqw.gif";
let img, push, image;
let showing = false;
$(document).ready(() => {
createZoom();
observeSystem();
detectAddress();
detectSwitch();
});
// 定義 Zoom
function createZoom() {
img = $("<img/>").css({
"position": "fixed",
"width": document.documentElement.clientWidth + "px",
"height": document.documentElement.clientHeight + "px",
"pointerEvents": "none",
"display": "inline",
"opacity": "0",
"transition": "opacity 0.4s"
}).appendTo("body");
}
// 觀察文件是否產生變化
function observeSystem() {
setTimeout(() => {
const h1 = $("section").find("H1");
const title = $("title");
if (h1.length !== 2 || title.length === 0) observeSystem();
else {
// 獲取目標
const target1 = [...h1[0].parentElement.childNodes].filter(child => child.tagName !== "H1")[0].childNodes[0].childNodes[0];
const target2 = title[0];
// 先執行一次
setTimeout(addListener, 1000);
// 建立觀察者，文件有變化就執行下列函式
const mutation = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver; //前綴
const observer = new mutation(addListener);
// 設定觀察選項
const config = { attributes: true, childList: true, characterData: true };
// 開始觀察
observer.observe(target1, config); //時間軸
observer.observe(target2, config); //標籤頁
}
}, 500);
}
// 偵測是否僅切換地址
function detectAddress() {
let pushState = history.pushState;
history.pushState = function () {
pushState.apply(history, arguments);
observeSystem();
};
}
// 偵測上一頁、下一頁
function detectSwitch() {
window.addEventListener("popstate", observeSystem);
}
// 增加監聽的物件
function addListener() {
if (location.href.match("photo/1")) return; //點進圖片後，不做放大效果
// 縮圖
$(".css-9pa8cd").each((index, image) => {
$(image).on("mousemove", showImage);
$(image).on("mouseleave", hideImage);
});
// 展開按鈕
$('[role="button"]').each((index, button) => {
$(button).on("click", observeSystem);
});
// 上方標籤
$('[role="tab"]').each((index, tab) => {
$(tab).on("click", () => { setTimeout(() => observeSystem, 3000); });
});
}
// 顯示圖片
function showImage() {
if (showing) return;
showing = true;
const url = getImage(this.src);
image = new Image();
image.onload = () => {
// 調整圖片寬高
const w = image.width;
const h = image.height;
const clientW = document.documentElement.clientWidth;
const clientH = document.documentElement.clientHeight;
const condition1 = w > clientW;
const condition2 = h > clientH;
if (condition1 && condition2) {
const rate = clientH / h;
const new_w = w * rate;
const new_h = clientH;
if (new_w > clientW) {
const rate2 = clientW / new_w;
const new_w2 = clientW;
const new_h2 = new_h * rate2;
img.css({ "width": new_w2 + "px", "height": new_h2 + "px" });
} else {
img.css({ "width": new_w + "px", "height": new_h + "px" });
}
} else if (condition1) {
const rate3 = clientW / w;
const new_h3 = h * rate3;
img.css({ "width": clientW + "px", "height": new_h3 + "px" });
} else if (condition2) {
const rate4 = clientH / h;
const new_w4 = w * rate4;
img.css({ "width": new_w4 + "px", "height": clientH + "px" });
} else {
img.css({ "width": w + "px", "height": h + "px" });
}
// 圖片位置
let left = clientW / 2 - img.width() / 2;
let top = clientH / 2 - img.height() / 2;
if (left < 0) left = 0;
if (top < 0) top = 0;
// 調整圖片屬性
img.attr("src", url);
img.css({
"left": left + "px",
"top": top + "px",
"display": "inline",
"opacity": "1"
});
};
image.src = url; //因不明原因，必須將這行寫在後面
}
// 取得圖片網址
function getImage(url) {
const m1 = url.split("/");
let newUrl = "https://pbs.twimg.com/";
// 一般圖
if (m1[3].match("media") !== null) {
for (let i = 3; i < m1.length; i++) {
if (i !== m1.length - 1) newUrl += m1[i] + "/";
else newUrl += m1[i].split("&")[0] + "&name=orig";
}
}
// 使用者頭像
else if (m1[3].match("profile") !== null) {
for (let i = 3; i < m1.length; i++) {
if (i !== m1.length - 1) newUrl += m1[i] + "/";
else {
const m2 = m1[i].split("_");
for (let i = 0; i < m2.length; i++) {
if (i === 0) newUrl += m2[i];
else if (i !== m2.length - 1) newUrl += "_" + m2[i];
else newUrl += "." + m2[i].split(".")[1];
}
}
}
}
// 影片不放大縮圖
else newUrl = null;
return newUrl;
}
// 隱藏圖片
function hideImage() {
showing = false;
image.src = null;
image.onload = null;
img.css({
"display": "none",
"opacity": "0"
});
}
})();