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鼠标指向链接标识图标预览链接网页
当前为
// ==UserScript==
// @name 链接预览
// @name:zh-cn 链接预览
// @name:en Link Previewer
// @namespace http://greasyfork.icu/zh-CN/users/1073-hzhbest
// @version 1.2
// @description 鼠标指向链接标识图标预览链接网页
// @description:zh-cn 鼠标指向链接标识图标预览链接网页
// @description:en Hovering to preview a link
// @author hzhbest
// @match *://*/*
// @grant none
// @license MIT
// ==/UserScript==
(function () {
'use strict';
// --------自定义区-------- //
const minHgap = 20, minVgap = 10; // 预览窗距鼠标位置的右、下最大距离：像素
var winWidth = 700, winHeight = 550; // 预览窗宽、高：像素
const scale = 0.9; // 预览窗内页面放大率：(0~1]
const animationtime = 0.5; // 动画时长：秒
const iconsize = 20; // 图标放大后大小：像素
const icontrpr = 0.7; // 图标放大后不透明度：(0~1)
const pre = "░░░░░░ "; // 移动手柄显示：字符串
const preID = "__link__prev_win" // 预览窗id
// --------自定义区结束--------//
const ixonimg = "data:image/png;base64,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";
const inonimg = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAACXBIWXMAATr4AAE6+AGeOBvEAAAA3klEQVQ4y83SPUpDURAF4M8YooUiIi7BQBaQ2lqirZjnVrIFCwsLDbbZgLoAO8FC7EJcgNgZUpvYTOByee/513hguDB3zpm5cy5/xOovOI0qgUZJ5FjDBbbxnF5s4hHjLPYz8jVmOFwmm0n3PdzhJXIreM06H6OP23y0LbyjVzJ2C8O8c51AGwOsB/kqyEd1m00FephiF5dfkZs1Vp0H8RQ3kS/iHJV6mmADJziLRe4kAkXlpwgsMI8Y4AEHP3nCPTohtMTbdwUKdCtq5+HQpEzgA09R0K5xa5p8tH+CT7aEK2vlnm2YAAAAAElFTkSuQmCCAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==";
const loadimg = "data:image/png;base64,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";
const domainregex = /(?<=:\/\/)[^\/]+/;
const id = "__link__prev";
const css = `
/* 链接样式 */
a.___prevlink>img.___previcon {
width: 16px !important; height: 16px !important;
opacity: 0%; transition: opacity 0.5s ease-out, background 0s;
position: absolute;
display: inline-block !important; margin: 0 !important;
}
a.___prevlink.__pr {
position: relative;
}
*:hover>a.___prevlink>img.___previcon {
opacity: 30%;
}
a.___prevlink:hover>img.___previcon {
opacity: ${icontrpr}; background: white; border: 1px solid #8d8d8db1;
transition: opacity 0.5s linear; z-index: 10008;
transform: scale(${iconsize / 16});
}
a.___prevlink>img.___previcon:hover {
background: #3e3ed3 !important; transition: background 1s !important;
}
a.__link__preved {
outline: 3px solid #3e3ed3;
}
/* 预览窗样式 */
div#${preID} {
opacity: 0; position: absolute; z-index: 10009; box-shadow: 1px 1px 7px 1px #717171;
padding: 0; margin: 0; background-color: white; transition: ${animationtime}s ease;
}
div#${preID}.__close {
transition: 0s !important; display: none;
}
div#${preID}.__loading {
background: url(${loadimg}) no-repeat center center; background-color: #e7e7e7;
}
div#${preID}.__link__visible {
opacity: 1; transition: 0.2s !important;
}
div#${preID}.visible .__link__prev_ifr {
border: none; transform: scale(${scale});
max-width: unset !important; width: calc(100% / ${scale});
max-height: unset !important; height: calc(100% / ${scale});
}
div#${preID}.__onmove, div#${preID}.__onsize{
transition: 0s !important;
}
div#${preID}.__onmove {
opacity: 0.7;
}
/* 关闭按钮样式 */
@keyframes rotating_button {
from {
transform: rotate(0deg);
}
to {
transform: rotate(360deg);
}
}
div#${preID}>.__link__clos_btn {
position: absolute; top: -10px; right: -10px; z-index: 10010;
line-height: 24px; width: 24px; height: 24px;
color: white; font-family: Consolas; font-size: 16px; text-align: center;
background: #df2020; border: 1px solid black; border-radius: 50%;
box-shadow: 1px 1px 5px #333; cursor: default; padding: 0 !important; margin: 0;
}
div#${preID}>.__link__clos_btn.__loading {
animation: 3s linear 0s infinite rotating_button; background: #d76565;
}
div#${preID}>.__link__clos_btn.__loading:hover {
animation: none; background: #df2020;
}
div#${preID}>.__link__clos_btn:hover {
outline: 3px solid #be3737a2;
}
div#${preID}>.__link__clos_btn.__close {
display: none;
}
/* 拖动手柄样式 */
div#${preID}>div.__link__prev_mv {
position: absolute; top: -5px; left: 0px; z-index: 10010;
height: 6px; width: 30px; border: 1px solid #242424; background: #3e3e3e; cursor: move;
border-radius: 3px; overflow: hidden; max-width: ${winWidth}px;
font-size: 14px !important; color: #d7d7d7; line-height: 20px;
}
div#${preID}>div.__link__prev_mv>* {
display: inline-block; width: fit-content;
}
div#${preID}>div.__link__prev_mv:hover {
color: #e0a52e; height: 20px; top: -20px; width: fit-content;
}
div#${preID}.__onmove>div.__link__prev_mv {
background: #6f6122; height: 50px; top: -20px; width: fit-content;
}
div#${preID} .__link__prev_ttl {
font-size: 14px !important; font-family: Arial; white-space: nowrap; margin: 0 3px;
}
div#${preID}>.__link__prev_rs {
height: 4px; width: 4px; border: 1px solid #616161; color: #9a9276; font-size: 13px;
position: absolute; right: 0; bottom: 0; z-index: 10011; background: #3e3e3e67;
transition: 0.3s ease-out; font-size: 10px; line-height: 10px; overflow: hidden;
cursor: nw-resize;
}
div#${preID}:hover>.__link__prev_rs {
background: #3e3e3e; height: 12px; width: 12px;
}
div#${preID}>.__link__prev_rs:hover {
border-color: #2c96e2af; height: 18px; width: 18px;
}
div#${preID}.__onsize>.__link__prev_rs {
height: 40px; width: 60px; transition: 0s; color: #e0a52e
}
`;
addCSS(css, id); // 添加的style节点添加id，用于判断是否需重添加
var previewwin, pre_ir, timer, linkprev, closebtn, movehand, titlebox, ondrag, resizehand, rsdrag;
makeprevwin();
var site = location.host;
document.addEventListener('mouseover', (evt) => { // 检查鼠标下的节点，查找链接添加图标
const t = evt.target;
if (t.tagName == "A" && ispagelink(t)) {
addIconTo([t]);
} else {
var links = getLinksInThreeLayer(t);
addIconTo(links);
}
});
setTimeout(function () { // 延时设置监视器，若标题变化则重新加载
var watch = document.querySelector('title');
new (window.MutationObserver || window.WebKitMutationObserver)(function (mutations) {
// console.log('标题变了', document.title);
if (!document.querySelector("#" + id)) {
addCSS(css, id);
}
if (!document.querySelector("#" + preID)) {
makeprevwin();
}
site = location.host;
}).observe(watch, { childList: true, subtree: true, characterData: true });
}, 1000);
function addIconTo(links) { // 往链接上添加图标；输入：链接的数组
var lnkl = links.length;
var exl = 0;
// console.log(lnkl);
for (let i = 0; i < lnkl; i++) {
const lnk = links[i];
if (lnk.classList.contains("___prevlink")) { // 跳过已处理的链接
continue;
}
lnk.classList.add("___prevlink");
if (window.getComputedStyle(lnk).position == "static") { // 若链接本身无position设置则添加定位样式
lnk.classList.add("__pr");
}
var lnkposit = getTrueSize(lnk); // 获取链接实占空间
var textWidth = mixStringLength(lnk.textContent ,parseInt(window.getComputedStyle(lnk).fontSize));
textWidth = Math.min(lnkposit.w, textWidth); // 以文本宽度和链接宽度中较少者为右边界
var img;
img = creaElemIn('img', lnk);
img.className = '___previcon';
img.style.bottom = '0.1em';
var adj = textWidth + 4; // 右边界右4像素；如果被父节点遮挡或自身隐藏
if (lnkposit.r < (4 + iconsize) || window.getComputedStyle(lnk).overflow !== "visible") {
adj = Math.min(adj, lnkposit.w - 5 - iconsize); // 则避开遮挡
}
img.style.left = adj + "px";
if (domainregex.exec(lnk.href)[0] !== site) { // 站内还是站外链接
img.src = ixonimg;
exl += 1;
} else {
img.src = inonimg;
}
img.addEventListener('mouseover', (evt) => { // 鼠标悬停图标上的动作
//clearTimeout(timer);
setTimeout(() => {
if (previewwin.classList.contains("__close")) { // 若预览窗关闭状态则移动到鼠标下
setWinPosit(evt.x, evt.y);
}
}, 1000);
timer = setTimeout(previewlink, 1000, evt); // 一秒后开启预览窗
});
img.addEventListener('mouseleave', () => { // 鼠标离开鼠标则清除计时
clearTimeout(timer);
});
}
//console.log("external link count:" + exl);
window.addEventListener('mousedown', (e) => { // 点击页面的动作
var target = e.target;
if (isPrevVisual() && !previewwin.contains(target)) { // 若预览窗开启且点击位置不在预览窗内则隐藏预览窗
hidepreview(e);
}
}, true);
}
function makeprevwin() { // 生成预览窗
previewwin = creaElemIn('div', document.body);
previewwin.id = preID;
previewwin.style.width = '100px'; // 显示前预览窗大小，显示时形成放大效果
previewwin.style.height = '100px';
previewwin.classList.add("__close"); // 初始状态关闭
movehand = creaElemIn('div', previewwin); // 移动手柄
movehand.classList.add("__link__prev_mv");
movehand.innerHTML = pre;
resizehand = creaElemIn('div', previewwin); // 调整大小手柄
resizehand.className = "__link__prev_rs";
titlebox = creaElemIn('div', movehand); // 标题栏
titlebox.className = "__link__prev_ttl";
pre_ir = creaElemIn('iframe', previewwin); // 预览容器iframe
pre_ir.className = "__link__prev_ifr";
pre_ir.style.border = 0;
closebtn = creaElemIn('div', previewwin); // 关闭按钮
closebtn.classList.add("__link__clos_btn");
closebtn.innerHTML = "✖";
closebtn.addEventListener('click', hidepreview);
ondrag = endrag(previewwin, { x: 'left', y: 'top' }, movehand); // 绑定移动预览窗对象
ondrag.hook('__drag_begin', () => { // 绑定移动开始、结束状态样式
previewwin.classList.add("__onmove");
});
ondrag.hook('__drag_end', () => {
previewwin.classList.remove("__onmove");
});
rsdrag = endrag(previewwin, { x: 'width', y: 'height' }, resizehand); // 绑定调整预览窗大小对象
rsdrag.hook('__dragging', () => { // 调整中更新iframe大小，记录预览窗大小
if (!!rsdrag.position) { // 未开始拖动前该对象不存在，判断避免编译出错
winWidth = rsdrag.position._x;
winHeight = rsdrag.position._y;
setIfrWinSize(winWidth, winHeight);
}
if (previewwin.classList.contains("__onsize")) { // 调整中显示当前大小（该状态需加入已开始判断）
// console.log("dragging", rsdrag.position.x, rsdrag.position.y);
resizehand.innerHTML = `
W: ${winWidth} px <br />H: ${winHeight} px
`;
}
});
rsdrag.hook('__drag_begin', () => { // 绑定调整大小开始、结束状态样式、显示
previewwin.classList.add("__onsize");
});
rsdrag.hook('__drag_end', () => {
previewwin.classList.remove("__onsize");
resizehand.innerHTML = "";
});
}
function previewlink(evt) { // 在预览窗中加载链接
if (!!linkprev) { // 若有链接在预览中，去除其预览中状态
linkprev.classList.remove("__link__preved");
}
linkprev = evt.target.parentNode; // 当前链接为预览中状态
linkprev.classList.add("__link__preved");
pre_ir.src = linkprev.href; // 加载页面，调整缩放
pre_ir.style.transform = "scale(" + scale + ")";
previewwin.classList.remove("__close"); // 预览窗去除关闭、添加加载中状态
previewwin.classList.add("__loading");
titlebox.innerHTML = linkprev.textContent; // 以链接文本为标题
setTimeout(() => { // 延时0.1秒（等待预览窗到位）显示、移动、大小
previewwin.classList.add("__link__visible");
let l = Math.max(minHgap, Math.min(window.innerWidth - winWidth - minHgap, evt.x));
let t = Math.max(minVgap, Math.min(window.innerHeight - winHeight - minVgap, evt.y));
setWinPosit(l, t);
setPrevWinSize(winWidth, winHeight);
closebtn.classList.remove("__close");
closebtn.classList.add("__loading");
}, 100);
pre_ir.onload = () => { // iframe加载完成后去除加载中状态
closebtn.classList.remove("__loading");
previewwin.classList.remove("__loading");
};
}
function setWinPosit(l, t) { // 根据屏幕位置设置网页位置
previewwin.style.left = l + window.scrollX + 'px';
previewwin.style.top = t + window.scrollY + 'px';
}
function setPrevWinSize(w, h) { // 设置预览窗口大小
previewwin.style.width = w + 'px';
previewwin.style.height = h + 'px';
setIfrWinSize(w, h);
}
function setIfrWinSize(w, h) { // 根据放大率设置iframe窗口大小
var f = (1 - scale) / 2 * -1 / scale;
pre_ir.width = w / scale;
pre_ir.height = h / scale;
pre_ir.style.marginLeft = (w * f) + 'px';
pre_ir.style.marginTop = (h * f) + 'px';
}
function hidepreview(evt) {
setPrevWinSize(100, 100); // 预览窗缩小效果
pre_ir.src = '';
setWinPosit(evt.x, evt.y); // 在鼠标位置消失
previewwin.classList.remove('__link__visible');
linkprev.classList.remove('__link__preved'); // 去除链接高亮中状态
closebtn.classList.add("__close");
setTimeout(() => { // 动画效果完成后添加关闭状态
previewwin.classList.add("__close");
}, animationtime * 1000 + 10);
}
function isPrevVisual() { // 预览窗是否可见
return previewwin && previewwin.classList.contains('__link__visible');
}
function getLinksInThreeLayer(elem) { // 对当前元素及其下两层的链接进行提取
var links = [];
elem.childNodes.forEach(cnode => {
if (ispagelink(cnode)) {
links.push(cnode);
} else {
cnode.childNodes.forEach(ccnode => {
if (ispagelink(ccnode)) {
links.push(ccnode);
} else {
ccnode.childNodes.forEach(cccnode => {
if (ispagelink(cccnode)) {
links.push(cccnode);
}
});
}
});
}
});
return links;
}
function ispagelink(node) { // 若节点是A且指向实网址（非js非锚点）返回true
if (node.tagName !== "A" || !node.href) {
return false;
}
const h = node.href, l = location.href;
if (h.indexOf('javascript:') == 0 || h.replace(l.split('#')[0], "").indexOf("#") == 0) {
return false;
} else {
return true;
}
}
function creaElemIn(tagname, destin) { //在 destin 内末尾创建元素 tagname
let theElem = destin.appendChild(document.createElement(tagname));
return theElem;
}
function addCSS(css, cssid) { // 创建带id的 style 节点
let stylenode = creaElemIn('style', document.getElementsByTagName('head')[0]);
stylenode.textContent = css;
stylenode.type = 'text/css';
stylenode.id = cssid || '';
}
// 输入元素，返回对象{元素可见的宽、高、顶、左、一层父元素右侧余量}
function getTrueSize(elem, posiz) {
if (!posiz) {
var p = elem.getBoundingClientRect();
posiz = {
w: p.width,
h: p.height,
t: p.top,
l: p.left,
r: 0
};
}
var pp = elem.parentNode.getBoundingClientRect();
if (posiz.r == 0) posiz.r = (pp.left + pp.width) - (posiz.l + posiz.w); // 父元素对当前元素的右侧余量
if (pp.width >= posiz.w && pp.height >= posiz.h && pp.top <= posiz.t && pp.left <= posiz.l) {
return posiz;
} else {
return getTrueSize(elem.parentNode, {
w: Math.min(posiz.w, pp.width),
h: Math.min(posiz.h, pp.height),
t: Math.max(posiz.t, pp.top),
l: Math.max(posiz.l, pp.left),
r: posiz.r
});
}
}
// 对target拖动handle时，实现拖动的功能
// 输入：目标元素target，拖动位置参考系opt，拖动手柄handle
// 输入opt：形如【{x:'right',y:'bottom'}】，或者width、height（右下角拖动）
function endrag(target, opt, handle) {
var p_x, p_y, isDragging;
endrag = function (target, opt, handle) {
return new endrag.proto(target, opt || {}, handle);
}
endrag.proto = function (target, opt, handle) {
var self = this;
this.target = target;
this.style = target.style;
this.handle = handle;
var _x = opt.x !== 'right';
var _y = opt.y !== 'bottom';
this.x = opt.x; //_x ? 'left' : 'right';
this.y = opt.y; //_y ? 'top' : 'bottom';
// p_x = this.x;
// p_y = this.y;
this.xd = _x ? -1 : 1;
this.yd = _y ? -1 : 1;
this.computed_style = document.defaultView.getComputedStyle(target, '');
this.drag_begin = function (e) { self.__drag_begin(e); };
this.handle.addEventListener('mousedown', this.drag_begin, false); //only drag on handler
this.dragging = function (e) { self.__dragging(e); };
document.addEventListener('mousemove', this.dragging, false);
this.drag_end = function (e) { self.__drag_end(e); };
document.addEventListener('mouseup', this.drag_end, false);
};
endrag.proto.prototype = {
__drag_begin: function (e) {
if (e.button == 0) {
var _c = this.computed_style;
this.isDragging = isDragging = true;
this.position = {
_x: parseFloat(_c[this.x]),
_y: parseFloat(_c[this.y]),
x: e.pageX,
y: e.pageY
};
e.preventDefault();
}
},
__dragging: function (e) {
if (!this.isDragging) return;
var x = Math.floor(e.pageX), y = Math.floor(e.pageY), p = this.position;
// prevent moving out of window
var x_border = window.innerWidth - 40, y_border = window.innerHeight - 20;
if (x - window.scrollX > x_border) x = window.scrollX + x_border;
if (y - window.scrollY > y_border) y = window.scrollY + y_border;
p._x = p._x + (p.x - x) * this.xd;
p._y = p._y + (p.y - y) * this.yd;
this.style[this.x] = p._x + 'px';
this.style[this.y] = p._y + 'px';
p.x = x;
p.y = y;
},
__drag_end: function (e) {
if (e.button == 0) {
if (this.isDragging) {
this.isDragging = isDragging = false;
}
}
},
hook: function (method, func) {
if (typeof this[method] === 'function') {
var o = this[method];
this[method] = function () {
if (func.apply(this, arguments) === false) {
return;
}
o.apply(this, arguments);
};
}
}
};
return endrag(target, opt, handle);
}
function mixStringLength(str, size) { // 输出按size（字号px）计算的字符长度
var cvalue = str.replace(/\r\n/g, "\n").trim();
var cncnt = (cvalue.match(/[\u4e00-\u9fa5]/g) || []).length; //统一中文字范围
var kncnt = (cvalue.match(/[\u3040-\u30ff]/g) || []).length; //日文假名范围
var krcnt = (cvalue.match(/[\uac00-\ud7af]/g) || []).length; //韩文字范围
var ttcnt = cvalue.length;
return ttcnt * size - (ttcnt - cncnt - kncnt - krcnt) * size / 2;
}
})();