// ==UserScript==
// @name 鼠标悬停图片放大预览-大师兄2.5
// @date 05/27/2021
// @namespace https://gf.qytechs.cn/zh-CN/users/724782-caogen1207
// @match *://*/*
// @version 2.5
// @author 大师兄 [email protected]
// @description 电脑端可以跟随鼠标悬停图片放大预览 /n找了很多图片放大的脚本,都没有一个能用的,只有自己写。脚本还不够完美,但大部分网站的图片都可以已支持悬浮放大了。/n完美适应大小屏幕,图片超大也会图片等比例自适应浏览器。/n鼠标跟随也优化/n欢迎反馈,有时间就更新/n下一步开发不能识别非图片元素的地方
// @note 2.5 2021年10月4日更新超大图片显示问题
// @require https://code.jquery.com/jquery-3.6.0.min.js
// @icon https://mms0.baidu.com/it/u=685985501,228922170&fm=27&gp=0.jpg&fmt=auto
// @grant none
// ==/UserScript==
(function() {
console.log("图片放大");
fangdatupian();
function fangdatupian() {
//添加图片盒子
$("body:eq(0)").append("<div id='dashixiong_preview' style='display:none;pointer-events:none;padding:0px;margin:0px;width:10px;height:10px;left:0px;top:0px;background-color:#ff0000;position:fixed;z-index:999999;'><img /></div>"); //弹出一个div里面放着图片
jiantingimg();
//jiantingBGimg();
//jiantingWEIimg();
}
function jiantingimg(){
//$("img").css({"cursor":"pointer","z-index":"9999"});
//$("body:eq(0)").prepend(`<style> img{cursor:pointer;z-index:9999999}</style>`);
$("body").on("mouseenter", "img",
function(e) {
let imgw,
imgh;
let imgsrc = $(this).attr("src");
$("#dashixiong_preview img").attr("src", imgsrc);
[imgw, imgh] = getImageWidth(imgsrc);
//console.log(imgw, imgh);
//鼠标进到图片里就先执行图片位置
tupianweizhi(e, imgw, imgh);
$("#dashixiong_preview").stop(true, false).fadeIn();
// 鼠标移动时给div挂事件
$(this).mousemove(function(e) {
tupianweizhi(e, imgw, imgh);
});
$(this).mouseleave(function(e) {
$("#dashixiong_preview").stop(true, false).hide();
});
});
}
function jiantingBGimg(){
$("body").on("mouseover", "div[style*='color']",
function(e) {
Toast($(this).html());
});
}
function jiantingWEIimg(){
$("body").on("mouseenter", "div[style]", function(){
//if($(this).attr("z-index")==1){
console.log($(this).attr("style"));
//}
});
}
function getImageWidth(url) {
let img = new Image();
img.src = url;
if (img.naturalWidth) { // 如果支持HTML5属性,直接使用
return [img.naturalWidth, img.naturalHeight];
} else {
// 新建一个图片副本,来获取原始宽高
let copy = new Image();
copy.onload = function() {
return [copy.width, copy.height];
};
copy.src = img.src;
}
}
function tupianweizhi(e, img_width, img_height) {
$("#dashixiong_preview img").height(img_height);
$("#dashixiong_preview img").width(img_width);
let jianxi = 20;
let window_height = $(window).height();
let window_width = $(window).width();
if (img_height > window_height || img_width > window_width) {
if (window_width*img_height/img_width > window_height) {
$("#dashixiong_preview img").css({
"height": window_height,
"width": img_width * window_height / img_height
});
}else {
$("#dashixiong_preview img").css({
"height": img_height * window_width / img_width,
"width": window_width
});
};
};
img_height = $("#dashixiong_preview img").height();
img_width = $("#dashixiong_preview img").width();
if (img_height + e.clientY > window_height && img_width + e.clientX < window_width) {
//console.log("显示高度超过屏幕,显示在鼠标左右两侧");
if (img_height + e.clientY + jianxi > window_height) {
$("#dashixiong_preview").css({
top: (e.clientY - img_height - jianxi) < 0 ? 0 : e.clientY - img_height - jianxi,
left: e.clientX + jianxi,
});
}
} else if (img_width + e.clientX + jianxi > window_width && img_height + e.clientY < window_height) {
//console.log("显示宽度超过屏幕,显示在鼠标上下两侧");
$("#dashixiong_preview").css({
top: e.clientY + jianxi,
left: (e.clientX - img_width - jianxi) < 0 ? 0 : e.clientX - img_width - jianxi,
});
} else if (img_width + e.clientX > window_width && img_height + e.clientY > window_height) {
//console.log("显示高度和宽度超过屏幕");
if (e.clientX - img_width - jianxi > 0 && e.clientY - img_height - jianxi > 0) {
$("#dashixiong_preview").css({
top: e.clientY - img_height - jianxi,
left: e.clientX - img_width - jianxi,
});
} else if (e.clientX - img_width - jianxi < 0 && e.clientY - img_height - jianxi > 0) {
$("#dashixiong_preview").css({
top: e.clientY - img_height - jianxi,
left: 0,
});
} else if (e.clientX - img_width - jianxi > 0 && e.clientY - img_height - jianxi < 0) {
$("#dashixiong_preview").css({
top: 0,
left: e.clientX - img_width - jianxi,
});
} else if (e.clientX - img_width - jianxi < 0 && e.clientY - img_height - jianxi < 0) {
$("#dashixiong_preview").css({
top: 0,
left: 0,
});
};
} else {
//console.log("显示在鼠标右下");
$("#dashixiong_preview").css({
top: e.clientY + jianxi,
left: e.clientX + jianxi,
});
}
}
function Toast(msg,duration){
duration=isNaN(duration)?3000:duration;
let m = document.createElement('div');
m.innerHTML = msg;
m.style.cssText="max-width:60%;min-width: 150px;padding:0 14px;height: 40px;color: rgb(255, 255, 255);line-height: 40px;text-align: center;border-radius: 4px;position: fixed;top: 50%;left: 50%;transform: translate(-50%, -50%);z-index: 999999;background: rgba(0, 0, 0,.7);font-size: 16px;";
document.body.appendChild(m);
setTimeout(function() {
let d = 0.5;
m.style.webkitTransition = '-webkit-transform ' + d + 's ease-in, opacity ' + d + 's ease-in';
m.style.opacity = '0';
setTimeout(function() { document.body.removeChild(m) }, d * 1000);
}, duration);
}
function getViewprotOffset() {
if (window.innerWidth) {
return [window.innerWidth,window.innerHeight]
} else {
if (document.compatMode == "BackCompat") {
return [document.body.clientWidth, document.body.clientHeight]
} else {
return [document.documentElement.clientWidth, document.documentElement.clientHeight]
}
}
}
})();