zh/searchurl/txt/markdeep.html

   1 <head>
   2   <script>window.markdeepOptions = {mode: 'script'};</script>
   3   <script src="https://morgan3d.github.io/markdeep/latest/markdeep.min.js"></script>
   4   <script id="MathJax-script" async src="https://fastly.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>
   5   <script>
   6     function absFile(url) {
   7       this.name=url;
   8       this.slice = async(offset, length) =>{
   9         const headers = new Headers();
  10         headers.append('range', 'bytes=' + offset + '-' + ( offset + length -1).toString());
  11
  12         const opts = {
  13           credentials: 'include',
  14           headers    : headers
  15         };
  16
  17         const resp = await fetch( this.name, opts );
  18         return await resp.arrayBuffer();
  19         //alert(JSON.stringify(resp.headers));
  20         //return await resp.text();
  21       }
  22     }
  23
  24     var file;
  25     var blocksize = 20480;
  26     function loadSlice(){
  27       function render(u8array){
  28         document.body.innerHTML = window.markdeep.format(new TextDecoder().decode(u8array),true);
  29         MathJax.typesetPromise();
  30       }
  31       function setPageUrl(pageurl){
  32         let a = document.createElement('a');
  33         a.href = "i:5c"+pageurl;
  34         a.click();
  35       }
  36
  37       var url;
  38       var page = 1;
  39       var extrasize = blocksize; //extrasize should <= blocksize
  40       let lhash = location.hash;
  41       if(lhash){
  42         if("p"!==lhash.charAt(1)){//#offset=&[len]
  43           let iAmpersand = lhash.indexOf('&',8);
  44           let offset = parseInt(lhash.substring(8,iAmpersand));
  45           let len = parseInt(lhash.substring(iAmpersand+1));
  46           {//update urlInc() url
  47             let href = location.href;
  48             let iHash = href.indexOf('#');
  49             href=href.substring(0,iHash)+"#page="+Math.floor((offset+len)/blocksize);
  50             setPageUrl(href);
  51           }
  52           file.slice(offset,len).then((buffer)=>{
  53             let u8 = new Uint8Array(buffer);
  54             render(u8);
  55           });
  56           return;
  57         }
  58         //#page=
  59         page = parseInt(lhash.substring(6));
  60       }else
  61         setPageUrl(location.href+"#page=1");
  62       file.slice(blocksize*(page-1),blocksize+extrasize).then((buffer)=>{
  63         let u8 = new Uint8Array(buffer);
  64         let u8len = u8.length;
  65         let iStart = 0;
  66         let limit = Math.min(u8len,extrasize);
  67         if(1!=page){
  68           for(let i=1;i<limit;i=i+2){
  69             if(10==u8[i] && 10==u8[i-1]) {
  70               iStart = i+1;
  71               break;
  72             }
  73           }
  74         }
  75         let iEnd = Math.min(u8len,blocksize);
  76         limit = Math.min(u8len,blocksize+extrasize);
  77         for(let i=blocksize+1;i<limit;i=i+2){
  78           if(10==u8[i] && 10==u8[i-1]) {
  79             iEnd = i+1;
  80             break;
  81           }
  82         }
  83         render(u8.slice(iStart,iEnd));
  84       });
  85
  86     }
  87     //?url=#offset=&[len]&page=
  88     file = new absFile(location.search.substring(5));
  89     window.addEventListener('hashchange',loadSlice);
  90   </script>
  91 </head>
  92 <body>
  93   <script>loadSlice();</script>
  94 </body>