mirror of https://github.com/torappinfo/uweb.git
153 lines
4.3 KiB
HTML
153 lines
4.3 KiB
HTML
<head>
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<base>
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<script src="https://fastly.jsdelivr.net/npm/marked@3.0.7/marked.min.js"></script>
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<script src="https://cdn.jsdelivr.net/npm/katex@0.13.11/dist/katex.min.js" crossorigin="anonymous"></script>
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<script>
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const renderer = new marked.Renderer();
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var options = {
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renderer: renderer,
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pedantic: false,
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gfm: true,
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breaks: false,
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sanitize: false,
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smartLists: true,
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smartypants: false,
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xhtml: false
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};
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marked.setOptions(options);
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function htmldecode(text){
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var temp = document.createElement("div");
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temp.innerHTML = text;
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var output = temp.innerText || temp.textContent;
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temp = null;
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return output;
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}
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function mathsExpression(expr) {
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if (expr.match(/^\$\$[\s\S]*\$\$$/)) {
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expr = expr.substr(2, expr.length - 4);
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return katex.renderToString(expr, { displayMode: true });
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} else if (expr.match(/^\$[\s\S]*\$$/)) {
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expr = htmldecode(expr); // temp solution
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expr = expr.substr(1, expr.length - 2);
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return katex.renderToString(expr, { displayMode: false });
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}
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}
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const unchanged = new marked.Renderer()
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renderer.code = function(code, lang, escaped) {
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if (!lang) {
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const math = mathsExpression(code);
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if (math) {
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return math;
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}
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}
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return unchanged.code(code, lang, escaped);
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};
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renderer.codespan = function(text) {
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const math = mathsExpression(text);
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if (math) {
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return math;
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}
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return unchanged.codespan(text);
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};
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function markedWithKatex(text) {
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return marked(text, options);
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}
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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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var file;
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var blocksize = 20480;
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function loadSlice(){
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function render(u8array){
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document.body.innerHTML = markedWithKatex(new TextDecoder().decode(u8array));
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scroll(0,0);
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}
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function setPageUrl(pageurl){
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let a = document.createElement('a');
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a.href = "i:5c"+pageurl;
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a.click();
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}
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var page = 1;
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var extrasize = blocksize; //extrasize should <= blocksize
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let lhash = location.hash;
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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=href.substring(0,iHash)+"#page="+Math.floor((offset+len)/blocksize);
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setPageUrl(href);
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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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}else
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setPageUrl(location.href+"#page=1");
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file.slice(blocksize*(page-1),blocksize+extrasize).then((buffer)=>{
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let u8 = new Uint8Array(buffer);
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let u8len = u8.length;
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let iStart = 0;
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let limit = Math.min(u8len,extrasize);
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if(1!=page){
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for(let i=1;i<limit;i=i+2){
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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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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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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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}
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render(u8.slice(iStart,iEnd));
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});
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}
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//?url=#offset=&[len]&page=
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{
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let url = location.search.substring(5);
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file = new absFile(url);
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document.getElementsByTagName('base')[0].href=url;
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}
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window.addEventListener('hashchange',loadSlice);
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</script>
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</head>
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<body>
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<script>loadSlice();</script>
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</body>
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