为github中的特定链接（releases、文件、项目地址）添加一个悬浮按钮，提供代理后的加速链接
// ==UserScript==
// @name gh-proxy-buttons
// @name:zh-CN github加速按钮
// @namespace https://github.com/du33169/gh-proxy-buttons
// @version 0.7
// @license MPL-2.0
// @require https://cdn.bootcdn.net/ajax/libs/clipboard.js/2.0.6/clipboard.min.js
// @description add a button beside github link(releases,files and repository url), click to get alternative url according to previously specified proxy.
// @description:zh-CN 为github中的特定链接（releases、文件、项目地址）添加一个悬浮按钮，提供代理后的加速链接
// @author du33169
// @match *://github.com/*
// @grant none
// @run-at document-end
// ==/UserScript==
(function()
{
'use strict';
//--------------------------代理设置-------------------------------
//用于在线代理的workers地址
const proxy_url= 'https://gh-proxy.du33169.workers.dev/';
/*
备用： 'https://gh.api.99988866.xyz/'; （来自gh-proxy项目作者）
代理服务器地址可自行修改，末尾斜杠不可省略！
*/
//--------------------------其他设置------------------------------
//是否打开调试输出
const open_log=true;
//鼠标离开链接或按钮后消失前等待的时间
const fade_timeout=100;//ms
//--------------------------功能代码------------------------------
function isRepoFile(ourTarget){
return (ourTarget.tagName=='A'
&&ourTarget.getAttribute('aria-label')!=null//利用&&短路特性防止没有属性的元素导致脚本终止
&&ourTarget.classList.contains("Link--primary")
&&ourTarget.getAttribute('aria-label').endsWith('(File)')
&&ourTarget.closest('#js-repo-pjax-container')!=null
);
}
function isReleaseAsset(ourTarget){
return (ourTarget.tagName=='A'
&&ourTarget.getAttribute('rel')!=null
&&ourTarget.rel=="nofollow"
//&&/github.com/.test(ourTarget.href)==true
&&(ourTarget.closest('#repo-content-pjax-container')!=null)||(ourTarget.closest('.js-truncated-assets-fragment')!=null)
);
}
function isDownloadZip(e){
return (e.tagName=='A'
&&e.classList.contains("kHKEGN")
&&e.getAttribute('rel')!=null
&&e.rel=="nofollow"
&&e.getAttribute('role')!=null
&&e.role=="menuitem"
);
}
function isHttpCopyGit(e){
return (
e.tagName=='BUTTON'
&&e.classList.contains('hUTZcL')
&&e.previousElementSibling!=null
&&e.previousElementSibling.tagName=='INPUT'
&&e.previousElementSibling.value.startsWith('https')
);
}
function getBtn(originLink,filename,copy=false)
{
var ghBtn=document.getElementById("gh-proxy-button");
//existed
if(!ghBtn){
//not existed, create instance
ghBtn=document.createElement('a');
ghBtn.setAttribute('class','btn');
ghBtn.id="gh-proxy-button";
ghBtn.title="[gh-proxy-buttons] get proxy link";
ghBtn.style.position="absolute";
ghBtn.role="button";
ghBtn.style.zIndex=9999;
//ghBtn.style.top=0;//must be set for transition
//ghBtn.style.left=0;
//ghBtn.style.transition="transform 0.5s ease-in-out";
ghBtn.addEventListener('mouseenter',function(){
if(open_log)console.debug('[gh-proxy-buttons] onbtn');
if(ghBtn.timerId !=undefined && ghBtn.timerId!=-1){
clearTimeout(ghBtn.timerId);
ghBtn.timerId=-1;
}
});
ghBtn.addEventListener('mouseleave',function(){
if(open_log)console.debug('[gh-proxy-buttons] mouseleave-btn');
if(ghBtn.timerId !=undefined && ghBtn.timerId!=-1)return;
ghBtn.timerId=setTimeout(function(){
ghBtn.style.visibility="hidden";
ghBtn.timerId=-1;
if(open_log)console.debug('[gh-proxy-buttons] timeout fade mouseleave-btn');
},fade_timeout);
if(open_log)console.debug('[gh-proxy-buttons] btn leave timerid:',ghBtn.timerId);
});
document.documentElement.appendChild(ghBtn);
}
//now gh-proxy-button exists
if(copy)//仓库地址input标签特殊处理，使用ClipboardJS实现点击复制
{
ghBtn.removeAttribute('target');
ghBtn.removeAttribute('download');
ghBtn.href="javascript:void(0)";
ghBtn.innerText="🚀📄";
ghBtn.clip=new ClipboardJS(ghBtn);
ghBtn.clip.on('success',function(){
ghBtn.innerText="🚀📄✔";
});
ghBtn.setAttribute('data-clipboard-text',proxy_url+originLink);
//console.log('[gh-proxy-buttons] input url processed');
}
else{
ghBtn.innerText="🚀";
ghBtn.target="_blank";
if(ghBtn.clip)ghBtn.clip.destroy();
ghBtn.clip=undefined;
ghBtn.download=filename;
ghBtn.removeAttribute('data-clipboard-text');
ghBtn.href=proxy_url+originLink;
}
return ghBtn;
}
console.log('[gh-proxy-buttons] processing...');
function moveHere(e,originLink,copy=false)//用于注册mouseenter事件,e为当前元素
{
//创建按钮对象,github中使用.btn的class可以为<a>标签加上按钮外观
var btn=getBtn(originLink,e.title,copy);
if(open_log)console.debug("[gh-proxy-buttons]",btn);
//e.parentElement.insertBefore(btn,e);
if(btn.timerId !=undefined && btn.timerId!=-1){
clearTimeout(btn.timerId);
btn.timerId=-1;
}
const rect = e.getBoundingClientRect();
const btnRect=btn.getBoundingClientRect();
const x = rect.left + window.scrollX - btnRect.width;
const y = rect.top + window.scrollY;
console.log(`Element coordinates (relative to document): x: ${x}, y: ${y}`);
btn.style.left=`${x}px`;
btn.style.top =`${y}px`;
if(btn.style.visibility=="visible"){
//btn.style.transform = `translate(${event.x}px, ${event.y}px)`;
}
else{
//btn.style.transform="";
btn.style.visibility="visible";
}
if(open_log)console.debug(`[gh-proxy-buttons] mousein, move btn to ${event.x},${event.y}`);
e.addEventListener('mouseleave',function(){
if(open_log)console.debug('[gh-proxy-buttons] mouseleave-target');
if(btn.timerId !=undefined && btn.timerId!=-1)return;
btn.timerId=setTimeout(function(){
btn.style.visibility="hidden";
btn.timerId=-1;
if(open_log)console.debug('[gh-proxy-buttons] timeout fade mouseleave-target');
},fade_timeout);
if(open_log)console.debug('[gh-proxy-buttons] target leave timerid:',btn.timerId);
});
}
function eventDelegation(e)
{
// e.target 是事件触发的元素
if(e.target!=null)
{
var ourTarget=e.target;
while(ourTarget!=e.currentTarget&&ourTarget.tagName!='A'&&ourTarget.tagName!='BUTTON')//releases页面触发元素为<a>内的span，需要上浮寻找
{
ourTarget=ourTarget.parentNode;
}
if(ourTarget==e.currentTarget)return;
//if(open_log)console.debug('[gh-proxy-buttons]','found A',ourTarget);
if(isRepoFile(ourTarget)||isReleaseAsset(ourTarget)||isDownloadZip(ourTarget))
{
console.log('[gh-proxy-buttons] ','found target',ourTarget);
moveHere(ourTarget,ourTarget.href);
}else if(isHttpCopyGit(ourTarget)){
console.log('[gh-proxy-buttons] ','found target copy button',ourTarget);
moveHere(ourTarget,ourTarget.previousElementSibling.value,true);
}
}
}
document.body.addEventListener("mouseover", eventDelegation);
})();