2021-11-06 11:30:23 +00:00
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<head>
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2021-11-08 07:41:41 +00:00
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<script>window.markdeepOptions = {mode: 'script'};</script>
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<script src="https://morgan3d.github.io/markdeep/latest/markdeep.min.js"></script>
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<script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>
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2021-11-06 11:30:23 +00:00
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<script>
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function absFile(url) {
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this.name=url;
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this.slice = async(offset, length) =>{
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const headers = new Headers();
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headers.append('range', 'bytes=' + offset + '-' + ( offset + length -1).toString());
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const opts = {
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credentials: 'include',
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headers : headers
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};
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const resp = await fetch( this.name, opts );
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return await resp.arrayBuffer();
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//alert(JSON.stringify(resp.headers));
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//return await resp.text();
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}
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}
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2021-11-08 07:41:41 +00:00
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2021-11-12 07:24:33 +00:00
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function render(u8array){
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document.body.innerHTML = window.markdeep.format(new TextDecoder().decode(u8array),true);
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MathJax.typesetPromise();
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}
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var file;
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var blocksize = 1024;
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2021-11-06 11:30:23 +00:00
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function loadSlice(){
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2021-11-08 07:41:41 +00:00
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var url;
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2021-11-06 11:30:23 +00:00
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var page = 1;
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2021-11-12 07:24:33 +00:00
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var extrasize = blocksize; //extrasize should <= blocksize
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2021-11-06 11:30:23 +00:00
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let lhash = location.hash;
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2021-11-12 07:24:33 +00:00
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if(lhash){
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if("p"!==lhash.charAt(1)){//#offset=&[len]
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let iAmpersand = lhash.indexOf('&',8);
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let offset = parseInt(lhash.substring(8,iAmpersand));
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let len = parseInt(lhash.substring(iAmpersand+1));
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{//update urlInc() url
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let href = location.href;
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let iHash = href.indexOf('#');
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href="i:5c"+href.substring(0,iHash)+"#page="+Math.floor((offset+len)/blocksize);
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let d=document;
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let a = d.createElement('a');
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a.href = href;
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a.click();
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}
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file.slice(offset,len).then((buffer)=>{
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let u8 = new Uint8Array(buffer);
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render(u8);
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});
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return;
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}
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//#page=
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page = parseInt(lhash.substring(6));
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}
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2021-11-08 07:41:41 +00:00
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file.slice(blocksize*(page-1),blocksize+extrasize).then((buffer)=>{
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2021-11-06 11:30:23 +00:00
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let u8 = new Uint8Array(buffer);
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2021-11-12 07:24:33 +00:00
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let u8len = u8.length;
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2021-11-06 11:30:23 +00:00
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let iStart = 0;
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2021-11-12 07:24:33 +00:00
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let limit = Math.min(u8len,extrasize);
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2021-11-06 11:30:23 +00:00
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if(1!=page){
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2021-11-12 07:24:33 +00:00
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for(let i=1;i<limit;i=i+2){
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2021-11-08 07:41:41 +00:00
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if(10==u8[i] && 10==u8[i-1]) {
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iStart = i+1;
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break;
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}
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}
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}
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2021-11-12 07:24:33 +00:00
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let iEnd = Math.min(u8len,blocksize);
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limit = Math.min(u8len,blocksize+extrasize);
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for(let i=blocksize+1;i<limit;i=i+2){
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2021-11-08 07:41:41 +00:00
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if(10==u8[i] && 10==u8[i-1]) {
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iEnd = i+1;
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break;
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}
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2021-11-06 11:30:23 +00:00
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}
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2021-11-12 07:24:33 +00:00
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render(u8.slice(iStart,iEnd));
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2021-11-06 11:30:23 +00:00
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});
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}
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2021-11-12 07:24:33 +00:00
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//?url=#offset=&[len]&page=
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file = new absFile(location.search.substring(5));
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window.addEventListener('hashchange',loadSlice);
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2021-11-06 11:30:23 +00:00
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</script>
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</head>
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<body>
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2021-11-12 07:24:33 +00:00
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<script>loadSlice();</script>
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2021-11-08 07:41:41 +00:00
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</body>
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