js-adler32/demo/browser.flow.js
2021-04-18 13:26:36 -04:00

123 lines
4.1 KiB
JavaScript

/*jshint browser:true */
/*eslint-env browser */
/*global ADLER32, Uint8Array */
/*:: declare var ADLER32: ADLER32Module; */
var X = ADLER32;
function console_log(/*:: ...args:Array<any> */) { if(typeof console !== 'undefined') console.log.apply(console, [].slice.call(arguments)); }
function lpad(s/*:string*/, len/*:number*/, chr/*:?string*/)/*:string*/{
var L/*:number*/ = len - s.length, C/*:string*/ = chr || " ";
if(L <= 0) return s;
return new Array(L+1).join(C) + s;
}
function is_defined(val/*:any*/, keys/*:Array<string>*/)/*:boolean*/ {
if(typeof val === "undefined") return false;
return keys.length === 0 || is_defined(val[keys[0]], keys.slice(1));
}
/*# buffer to string; IE String.fromCharCode.apply limit, manual chunk */
/*::
type ArrayLike = any;
type Stringifier = {(d:ArrayLike):string};
*/
function make_chunk_buf_to_str(BType/*:function*/)/*:Stringifier*/ {
return function(data/*:any*/)/*:string*/ {
var o = "", l = 0, w = 10240, L = data.byteLength/w;
for(; l<L; ++l) o+=String.fromCharCode.apply(null, ((new BType(data.slice(l*w,l*w+w)))/*:any*/));
o+=String.fromCharCode.apply(null, ((new BType(data.slice(l*w)))/*:any*/));
return o;
};
}
/*# buffer to binary string */
var bstrify/*:Stringifier*/ = make_chunk_buf_to_str(typeof Uint8Array !== 'undefined' ? Uint8Array : Array);
/*# readAsBinaryString support */
var rABS/*:boolean*/ = typeof FileReader !== 'undefined' && is_defined(FileReader, ['prototype', 'readAsBinaryString']);
var userABS/*:HTMLInputElement*/ = (document.getElementsByName("userabs")[0]/*:any*/);
if(!rABS) {
userABS.disabled = true;
userABS.checked = false;
}
/*## Process Result */
/*:: declare class HTMLPreElement extends HTMLElement { innerText?:string; } */
function process_value(val/*:ADLER32Type*/) {
var output = [];
output[0] = "Signed : " + val;
output[1] = "Unsigned : " + (val>>>0);
output[2] = "Hex value : " + lpad((val>>>0).toString(16),8,'0');
var out/*:HTMLPreElement*/ = (document.getElementById('out')/*:any*/);
var o = output.join("\n");
if(typeof out.innerText == "undefined") out.textContent = o;
else out.innerText = o;
console_log("output", new Date());
}
/*## Raw Text */
var dotxt/*:HTMLInputElement*/ = (document.getElementById('dotext')/*:any*/);
dotxt.onclick = function() {
var txt/*:HTMLTextAreaElement*/=(document.getElementById('rawdata')/*:any*/);
console_log("onload", new Date());
var wb/*:ADLER32Type*/ = X.str(txt.value);
process_value(wb);
};
/*# HTML5 */
var readcb = function(e/*:Event*/) {
console_log("onload", new Date(), rABS, false);
var target/*:FileReader*/ = (e.target/*:any*/);
var data = target.result;
var val/*:ADLER32Type*/ = rABS ? X.bstr(/*::(*/data/*:: :any)*/) : X.str(bstrify(data));
process_value(val);
};
/*## File Input */
var handle_file = function(e/*:Event*/) {
rABS = userABS.checked;
var otarget/*:HTMLInputElement*/ = (e.target/*:any*/);
var files/*:FileList*/ = otarget.files;
var f/*:File*/ = files[0];
var reader/*:FileReader*/ = new FileReader();
reader.onload = readcb;
if(rABS) (reader/*:any*/).readAsBinaryString(f);
else reader.readAsArrayBuffer(f);
};
var xlf/*:HTMLInputElement*/ = (document.getElementById('xlf')/*:any*/);
if(xlf.addEventListener) xlf.addEventListener('change', handle_file, false);
/*## Drag and Drop File */
var handle_drop/*:EventHandler*/ = (function(e/*:DragEvent*/) {
e.stopPropagation();
e.preventDefault();
rABS = userABS.checked;
if(!e.dataTransfer) return;
var files/*:FileList*/ = e.dataTransfer.files;
var f/*:File*/ = files[0];
var reader/*:FileReader*/ = new FileReader();
reader.onload = readcb;
if(rABS) (reader/*:any*/).readAsBinaryString(f);
else reader.readAsArrayBuffer(f);
}/*:any*/);
var handle_drag/*:EventHandler*/ = (function (e/*:DragEvent*/) {
e.stopPropagation();
e.preventDefault();
if(e.dataTransfer) e.dataTransfer.dropEffect = 'copy';
}/*:any*/);
var drop/*:HTMLDivElement*/ = (document.getElementById('drop')/*:any*/);
if(drop.addEventListener) {
drop.addEventListener('dragenter', handle_drag, false);
drop.addEventListener('dragover', handle_drag, false);
drop.addEventListener('drop', handle_drop, false);
}