59 lines
1.9 KiB
JavaScript
59 lines
1.9 KiB
JavaScript
/*jshint browser:true */
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function lpad(s/*:string*/, len/*:number*/, chr/*:?string*/)/*:string*/{
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var L/*:number*/ = len - s.length, C/*:string*/ = chr || " ";
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if(L <= 0) return s;
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return new Array(L+1).join(C) + s;
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}
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function is_defined(val/*:any*/, keys/*:Array<string>*/)/*:boolean*/ {
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if(typeof val === "undefined") return false;
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return keys.length === 0 || is_defined(val[keys[0]], keys.slice(1));
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}
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/*## Process Result */
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/*:: declare class HTMLPreElement extends HTMLElement { innerText?:string; } */
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function process_value(val/*:CRC32Type*/, progress/*:number*/) {
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var output = [];
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output[0] = "Progress : %" + lpad(progress.toFixed(2), 6, " ");
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output[1] = "Signed : " + val;
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output[2] = "Unsigned : " + (val>>>0);
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output[3] = "Hex value : " + lpad((val>>>0).toString(16),8,'0');
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var out/*:HTMLPreElement*/ = (document.getElementById('out')/*:any*/);
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var o = output.join("\n");
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if(typeof out.innerText == "undefined") out.textContent = o;
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else out.innerText = o;
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}
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/*# Drag and Drop File */
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var handle_drop/*:EventHandler*/ = (function(e/*:DragEvent*/) {
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e.stopPropagation();
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e.preventDefault();
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if(!e.dataTransfer) return;
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var files/*:FileList*/ = e.dataTransfer.files;
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var f/*:File*/ = files[0];
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var worker = new Worker("/demo/work.js");
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worker.postMessage(f);
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worker.onmessage = function(M) { var m = M.data; switch(m.t) {
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case 'ready': break;
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case 'start': break;
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case 'data': process_value(m.crc, 100 * m.bytes / f.size); break;
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case 'done': break;
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} };
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}/*:any*/);
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var handle_drag/*:EventHandler*/ = (function (e/*:DragEvent*/) {
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e.stopPropagation();
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e.preventDefault();
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if(e.dataTransfer) e.dataTransfer.dropEffect = 'copy';
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}/*:any*/);
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var drop/*:HTMLDivElement*/ = (document.getElementById('drop')/*:any*/);
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if(drop.addEventListener) {
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drop.addEventListener('dragenter', handle_drag, false);
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drop.addEventListener('dragover', handle_drag, false);
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drop.addEventListener('drop', handle_drop, false);
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}
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