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base64.js
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base64.js
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/**
* Created by Amio, 2013.09.12
* Repository: http://github.com/amio/base64
* Credit to Ole Morten Didriksen
*/
(function () {
'use strict';
function $(selecterString) {
return document.querySelector(selecterString);
}
var eWrapper = $('#wrapper'),
eTextInput = $('#textInput'),
eFileInput = $('#fileInput'),
eDropMask = $('#dropMask'),
eBase64 = $('#textBase64');
if (!hasRequiredFunctionality()) {
eWrapper.innerHTML = 'Your browser does not support atob, btoa or FileReader.<br />\
As this website only aims to use this functionality (not replace it), you\
should look for what you need elsewhere.<br />Or you can use a newer browser.';
return;
}
eTextInput.oninput = handleTextInput;
eFileInput.onchange = handleFileInput;
document.body.ondragover = FileDragHover;
document.body.onclick = FileDragHover; // clear drop mask while click
document.body.ondrop = onFileDropped;
eBase64.oninput = handleBase64Input;
function hasRequiredFunctionality() {
return typeof atob != "undefined" && typeof btoa != "undefined" && typeof FileReader != "undefined";
}
// file drag hover
function FileDragHover(e) {
e.stopPropagation();
e.preventDefault();
document.body.className = (e.type == "dragover" ? "dragover" : "");
}
function onFileDropped(e) {
// cancel event and hover styling
FileDragHover(e);
var files = e.target.files || e['dataTransfer'].files;
eTextInput.value = '';
encodeFile(files[0]);
}
function handleTextInput() {
var input = eTextInput.value;
var result;
try{
result = btoa(input);
}catch(e){
result = '';
console.log(e.message);
}
eBase64.value = result;
}
function handleFileInput() {
var files = event.target.files;
if ( files && files.length == 1 ){
eTextInput.value = '';
encodeFile(files[0]);
}
}
function encodeFile(file) {
var reader = new FileReader();
reader.onload = function (e) {
eBase64.value = e.target.result;
};
reader.readAsDataURL(file);
}
function handleBase64Input() {
var result;
try{
result = atob(eBase64.value);
}catch(e){
result = '';
console.log(e.message);
}
eTextInput.value = result;
}
}());