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0bin/zerobin/static/js/behavior.js

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2012-05-12 12:33:01 +04:00
/*global sjcl:true, jQuery:true, $:true, lzw:true, zerobin:true, ZeroClipboard:true, vizhash:true, prettyPrint:true, confirm:true */
;
(function () {
"use strict";
/* Start random number generator seeding ASAP */
sjcl.random.startCollectors();
/* Ensure jquery use cache for ajax requests */
$.ajaxSetup({
cache: true
});
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/** Create a function that create inline callbacks.
We use it to create callbacks for onliners with static arguments
E.G:
$('stuff').hide(function()(console.log(1, 2, 3)))
Becomes:
$('stuff').hide(mkcb(console.log, 1, 2, 3))
*/
function mkcb(func) {
var args = arguments;
return function () {
return func.apply(func, Array.prototype.slice.call(args, 1));
};
}
/***************************
**** 0bin utilities ***
***************************/
window.zerobin = {
/** Base64 + compress + encrypt, with callbacks before each operation,
and all of them are executed in a timed continuation to give
a change to the UI to respond.
*/
version: '0.1.1',
encrypt: function (key, content, toBase64Callback,
compressCallback, encryptCallback, doneCallback) {
setTimeout(function () {
content = sjcl.codec.utf8String.toBits(content);
if (toBase64Callback) {
toBase64Callback();
}
setTimeout(function () {
content = sjcl.codec.base64.fromBits(content);
if (compressCallback) {
compressCallback();
}
setTimeout(function () {
// content = lzw.compress(content); // Create a bug with JPG
if (encryptCallback) {
encryptCallback();
}
setTimeout(function () {
try {
content = sjcl.encrypt(key, content);
} catch (e) {
$('input, textarea, select, button').prop('disabled', false);
zerobin.progressBar('form.well .progress').container.hide();
zerobin.message('error', 'Paste could not be encrypted. Aborting.',
'Error');
}
if (doneCallback) {
doneCallback(content);
}
}, 250);
}, 250);
}, 250);
}, 250);
},
/** Base64 decoding + uncompress + decrypt, with callbacks before each operation,
and all of them are executed in a timed continuation to give
a change to the UI to respond.
This is where using a library to fake synchronicity could start to be
useful, this code is starting be difficult to read. If anyone read this
and got a suggestion, by all means, speak your mind.
*/
decrypt: function (key, content, errorCallback, uncompressCallback,
fromBase64Callback, toStringCallback, doneCallback) {
/* Decrypt */
setTimeout(function () {
try {
content = sjcl.decrypt(key, content);
if (uncompressCallback) {
uncompressCallback();
}
/* Decompress */
setTimeout(function () {
try {
content = lzw.decompress(content);
if (fromBase64Callback) {
fromBase64Callback();
}
/* From base 64 to bits */
setTimeout(function () {
try {
content = sjcl.codec.base64.toBits(content);
if (toStringCallback) {
toStringCallback();
}
/* From bits to string */
setTimeout(function () {
try {
content = sjcl.codec.utf8String.fromBits(content);
if (doneCallback) {
doneCallback(content);
}
} catch (err) {
errorCallback(err);
}
}, 250); /* "End of from bits to string" */
} catch (err) {
errorCallback(err);
}
}, 250); /* End of "from base 64 to bits" */
} catch (err) {
errorCallback(err);
}
}, 250); /* End of "decompress" */
} catch (err) {
errorCallback(err);
}
}, 250); /* End of "decrypt" */
},
/** Create a random base64-like string long enought to be suitable as
an encryption key */
makeKey: function (entropy) {
entropy = Math.ceil(entropy / 6) * 6; /* non-6-multiple produces same-length base64 */
var key = sjcl.bitArray.clamp(
sjcl.random.randomWords(Math.ceil(entropy / 32), 0), entropy );
return sjcl.codec.base64.fromBits(key, 0).replace(/\=+$/, '').replace(/\//, '-');
},
getFormatedDate: function (date) {
date = date || new Date();
return ((date.getMonth() + 1) + '-' + date.getDate() + '-' + date.getFullYear());
},
getFormatedTime: function (date) {
date = date || new Date();
var h = date.getHours(),
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m = date.getMinutes(),
s = date.getSeconds();
if (h < 10) {
h = "0" + h;
}
if (m < 10) {
m = "0" + m;
}
if (s < 10) {
s = "0" + s;
}
return h + ":" + m + ":" + s;
},
numOrdA: function (a, b) {
return (a - b);
},
/** Return a reverse sorted list of all the keys in local storage that
are prefixed with with the passed version (default being this lib
version) */
getLocalStorageKeys: function () {
var version = 'zerobinV0.1';
var keys = [];
for (var key in localStorage) {
if (key.indexOf(version) !== -1) {
keys.push(key);
}
}
keys.sort();
keys.reverse();
return keys;
},
/** Get a tinyurl using JSONP */
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getTinyURL: function(longURL, success) {
$.ajax({
url: 'https://www.googleapis.com/urlshortener/v1/url',
type: 'POST',
contentType: 'application/json',
data: JSON.stringify({
"longUrl": longURL
}),
processData: false,
dataType: 'json'
}).done(function(data){
success(data.id);
});
},
/** Check for browser support of the named featured. Store the result
and add a class to the html tag with the result */
support: {
localStorage: (function () {
var val = !! (localStorage);
$('html').addClass((val ? '' : 'no-') + 'local-storage');
return val;
})(),
history: (function () {
var val = !! (window.history && history.pushState);
$('html').addClass((val ? '' : 'no-') + 'history');
return val;
})(),
fileUpload: (function () {
var w = window;
var val = !! (w.File && w.FileReader && w.FileList && w.Blob);
$('html').addClass((val ? '' : 'no-') + 'file-upload');
return val;
})()
},
/** Store the paste of a URL in local storate, with a storage format
version prefix and the paste date as the key */
storePaste: function (url, date) {
date = date || new Date();
date = (date.getFullYear() + '-' + (date.getMonth() + 1) + '-' + date.getDate() + ' ' + zerobin.getFormatedTime(date));
var keys = zerobin.getLocalStorageKeys();
if (localStorage.length > 19) {
void localStorage.removeItem(keys[19]);
}
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localStorage.setItem('zerobinV' + zerobin.version + "#" + date, url);
},
/** Return a list of the previous paste url with the creation date
If the paste is from today, date format should be "at hh:ss",
else it should be "the mm-dd-yyy"
*/
getPreviousPastes: function () {
var pastes = [],
keys = zerobin.getLocalStorageKeys(),
today = zerobin.getFormatedDate();
$.each(keys, function (i, key) {
var pasteDateTime = key.replace(/^[^#]+#/, '');
var displayDate = pasteDateTime.match(/^(\d+)-(\d+)-(\d+)\s/);
displayDate = displayDate[2] + '-' + displayDate[3] + '-' + displayDate[1];
var prefix = 'the ';
if (displayDate === today) {
displayDate = pasteDateTime.split(' ')[1];
prefix = 'at ';
}
pastes.push({
displayDate: displayDate,
prefix: prefix,
link: localStorage.getItem(key)
});
});
return pastes;
},
/** Return an link object with the URL as href so you can extract host,
protocol, hash, etc.
This function use a closure to store a <div> parent for the <a>
because IE requires the link be processed by it's HTML parser
for the URL to be parsed. */
parseUrl: (function () {
var div = document.createElement('div');
div.innerHTML = "<a></a>";
return function (url) {
div.firstChild.href = url;
div.innerHTML = div.innerHTML;
return div.firstChild;
};
})(),
getPasteId: function (url) {
var loc = url ? zerobin.parseUrl(url) : window.location;
return loc.pathname.replace(/\/|paste/g, '');
},
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getPasteKey: function (url) {
var loc = url ? zerobin.parseUrl(url) : window.location;
return loc.hash.replace('#', '').replace(/(\?|&).*$/, '');
},
/** Return the paste content stripted from any code coloration */
getPasteContent: function () {
var copy = '';
$("#paste-content li").each(function (index) {
copy = copy + $(this).text().replace(/[\u00a0]+/g, ' ') + '\n';
});
if (copy == '') {
copy = $("#paste-content").text();
}
return copy;
},
/** Return an approximate estimate the number of bytes in a text */
count: function (text, options) {
// Set option defaults
var crlf = /(\r?\n|\r)/g;
var whitespace = /(\r?\n|\r|\s+)/g;
options = options || {};
options.lineBreaks = options.lineBreaks || 1;
var length = text.length,
nonAscii = length - text.replace(/[\u0100-\uFFFF]/g, '').length,
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lineBreaks = length - text.replace(crlf, '').length;
return length + nonAscii + Math.max(0, options.lineBreaks * (lineBreaks - 1));
},
/** Create a message, style it and insert it in the alert box */
message: function (type, message, title, flush, callback) {
$(window).scrollTop(0);
if (flush) {
$('.alert-' + type).remove();
}
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var $message = $('#alert-template').clone().attr('id', null)
.addClass('alert alert-' + type);
$('.message', $message).html(message);
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if (title) {
$('.title', $message).html(title);
} else {
$('.title', $message).remove();
}
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$message.prependTo($('#main')).show('fadeUp', callback);
},
/** Return a progress bar object */
progressBar: function (selector) {
var $container = $(selector);
var bar = {
container: $container,
elem: $container.find('.bar')
};
bar.set = function (text, rate) {
bar.elem.text(text).css('width', rate);
};
return bar;
},
/** Return an integer ranking the probability this text is any kind of
source code. */
isCode: function (text) {
var code_chars = /[A-Z]{3}[A-Z]+|\.[a-z]|[=:<>{}\[\]$_'"&]| {2}|\t/g;
var comments = /(:?\/\*|<!--)(:?.|\n)*?(:?\*\/|-->)|(\/\/|#)(.*?)\n/g;
var formating = /[-*=_+]{4,}/;
var total = 0;
var size = 0;
var m = text.match(comments);
if (m) {
total += text.match(comments).length;
}
text = text.replace(comments, '');
text.replace(formating, '');
text = text.split('\n');
for (var i = 0; i < text.length; i++) {
var line = text[i];
size += line.length;
var match = line.replace(formating, '').match(code_chars);
if (match) {
total += match.length;
}
}
return total * 1000 / size;
},
// prevent defaults
ignoreDrag: function (e) {
e.originalEvent.stopPropagation();
e.originalEvent.preventDefault();
},
// Handle Drop
handleDrop: function (e) {
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e.originalEvent.preventDefault();
zerobin.upload(e.originalEvent.dataTransfer.files);
$("#content").removeClass('hover');
},
handleDragOver: function (e) {
zerobin.ignoreDrag(e);
$(this).addClass('hover');
},
handleDragLeave: function (e) {
$(this).removeClass('hover');
},
upload: function (files) {
var current_file = files[0];
var reader = new FileReader();
if (current_file.type.indexOf('image') == 0) {
reader.onload = function (event) {
var image = new Image();
image.src = event.target.result;
image.onload = function() {
var maxWidth = 1024,
maxHeight = 1024,
imageWidth = image.width,
imageHeight = image.height;
if (imageWidth > imageHeight) {
if (imageWidth > maxWidth) {
imageHeight *= maxWidth / imageWidth;
imageWidth = maxWidth;
}
}
else {
if (imageHeight > maxHeight) {
imageWidth *= maxHeight / imageHeight;
imageHeight = maxHeight;
}
}
var canvas = document.createElement('canvas');
canvas.width = imageWidth;
canvas.height = imageHeight;
image.width = imageWidth;
image.height = imageHeight;
var ctx = canvas.getContext("2d");
ctx.drawImage(this, 0, 0, imageWidth, imageHeight);
var paste = canvas.toDataURL(current_file.type);
$('#content').val(paste).trigger('change');
$('#content').hide();
$(image).css('max-width', '742px');
$('#content').after(image);
}
}
reader.readAsDataURL(current_file);
} else {
reader.onload = function (event) {
$('#content').val(event.target.result).trigger('change');
};
reader.readAsText(current_file);
}
}
};
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/***************************
**** On document ready ***
****************************/
$(function () {
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/**
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On the create paste page:
On click on the send button, compress and encrypt data before
posting it using ajax. Then redirect to the address of the
newly created paste, adding the key in the hash.
*/
$('.btn-primary').live("click", function (e) {
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e.preventDefault();
var paste = $('textarea').val();
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if (paste.trim()) {
var $form = $('input, textarea, select, button').prop('disabled', true);
// set up progress bar
var bar = zerobin.progressBar('form.well .progress');
bar.container.show();
bar.set('Converting paste to bits...', '25%');
/* Encode, compress, encrypt and send the paste then redirect the user
to the new paste. We ensure a loading animation is updated
during the process by passing callbacks.
*/
try {
var expiration = $('#expiration').val();
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var key = zerobin.makeKey(256);
zerobin.encrypt(key, paste,
mkcb(bar.set, 'Encoding to base64...', '45%'),
mkcb(bar.set, 'Compressing...', '65%'),
mkcb(bar.set, 'Encrypting...', '85%'),
/* This block deal with sending the data, redirection or error handling */
function (content) {
bar.set('Sending...', '95%');
var data = {
content: content,
expiration: expiration
};
var sizebytes = zerobin.count(JSON.stringify(data));
var oversized = sizebytes > zerobin.max_size; // 100kb - the others header information
var readableFsize = Math.round(sizebytes / 1024);
var readableMaxsize = Math.round(zerobin.max_size / 1024);
if (oversized) {
bar.container.hide();
$form.prop('disabled', false);
zerobin.message('error', ('The encrypted file was <strong class="file-size">' + readableFsize +
'</strong>KB. You have reached the maximum size limit of ' + readableMaxsize + 'KB.'),
'Warning!', true);
return;
}
$.post('/paste/create', data)
.error(function (error) {
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$form.prop('disabled', false);
bar.container.hide();
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zerobin.message(
'error',
'Paste could not be saved. Please try again later.',
'Error');
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})
.success(function (data) {
bar.set('Redirecting to new paste...', '100%');
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if (data.status === 'error') {
zerobin.message('error', data.message, 'Error');
$form.prop('disabled', false);
bar.container.hide();
} else {
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var paste_url = '/paste/' + data.paste + '#' + key;
if (zerobin.support.localStorage) {
zerobin.storePaste(paste_url);
}
window.location = (paste_url);
}
});
});
} catch (err) {
$form.prop('disabled', false);
bar.container.hide();
zerobin.message('error', 'Paste could not be encrypted. Aborting.',
'Error');
}
}
});
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/**
DECRYPTION:
On the display paste page, decrypt and decompress the paste content,
add syntax coloration then setup the copy to clipboard button.
Also calculate and set the paste visual hash.
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*/
var content = $('#paste-content').text().trim();
var key = zerobin.getPasteKey();
var error = false;
if (content && key) {
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/* Load the lib for visual canvas, create one from the paste id and
insert it */
$.getScript("/static/js/vizhash.min.js").done(function (script, textStatus) {
if (vizhash.supportCanvas) {
var vhash = vizhash.canvasHash(zerobin.getPasteId(), 24, 24);
$('<a class="vhash" href="#"></a>').click(function (e) {
e.preventDefault();
if (confirm("This picture is unique to your paste so you can identify" +
" it quickly. \n\n Do you want to know more about this?")) {
window.open("http://is.gd/IJaMRG", "_blank");
}
}).prependTo('.lnk-option').append(vhash.canvas);
}
});
var $form = $('input, textarea, select, button').prop('disabled', true);
var bar = zerobin.progressBar('.well form .progress');
bar.container.show();
bar.set('Decrypting paste...', '25%');
zerobin.decrypt(key, content,
/* On error*/
function () {
bar.container.hide();
zerobin.message('error', 'Could not decrypt data (Wrong key ?)', 'Error');
},
/* Update progress bar */
mkcb(bar.set, 'Decompressing...', '45%'),
mkcb(bar.set, 'Base64 decoding...', '65%'),
mkcb(bar.set, 'From bits to string...', '85%'),
/* When done */
function (content) {
/* Decrypted content goes back to initial container*/
$('#paste-content').text(content);
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if (content.indexOf('data:image') == 0) {
// Display Image
$('#paste-content').hide();
var img = $('<img/>');
$(img).attr('src', content);
$(img).css('max-width', '742px');
$('#paste-content').after(img);
// Display Download button
$('.btn-clone').hide();
var button = $('<a/>').attr('href', content);
$(button).attr('download', '0bin_' + document.location.pathname.split('/').pop());
$(button).addClass('btn');
$(button).html('<i class="icon-download"></i> Download');
$('.btn-clone').after(button);
}
bar.set('Code coloration...', '95%');
/* Add a continuation to let the UI redraw */
setTimeout(function () {
/* Setup flash clipboard button */
ZeroClipboard.setMoviePath('/static/js/ZeroClipboard.swf');
var clip = new ZeroClipboard.Client();
// Callback to reposition the clibpboad flash animation overlay
var reposition = function () {
clip.reposition();
};
clip.addEventListener('mouseup', function () {
$('#clip-button').text('Copying paste...');
clip.setText(zerobin.getPasteContent());
});
clip.addEventListener('complete', function () {
$('#clip-button').text('Copy to clipboard');
zerobin.message('info', 'The paste is now in your clipboard', '',
true, reposition);
});
clip.glue('clip-button');
window.onresize = reposition;
/* Setup link to get the paste short url*/
$('#short-url').click(function (e) {
e.preventDefault();
$('#short-url').text('Loading short url...');
zerobin.getTinyURL(window.location.toString(), function (tinyurl) {
clip.setText(tinyurl);
$('#copy-success').hide();
zerobin.message('success',
'<a href="' + tinyurl + '">' + tinyurl + '</a>',
'Short url', true, reposition);
$('#short-url').text('Get short url');
});
});
/* Remap the message close handler to include the clipboard
flash reposition */
$(".close").die().live('click', function (e) {
e.preventDefault();
$(this).parent().fadeOut(reposition);
});
/** Syntaxic coloration */
if (zerobin.isCode(content) > 100) {
$('#paste-content').addClass('linenums');
prettyPrint();
} else {
if (content.indexOf('data:image') != 0) {
zerobin.message('info',
"The paste did not seem to be code, so it " +
"was not colorized. " +
"<a id='force-coloration' href='#'>Force coloration</a>",
'', false, reposition);
}
}
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/* Class to switch to paste content style with coloration done */
$('#paste-content').addClass('done');
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/* Display result */
bar.set('Done', '100%');
bar.container.hide();
$form.prop('disabled', false);
content = '';
}, 250);
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});
} /* End of "DECRYPTION" */
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/* Synchronize expiration select boxes value */
$('.paste-option select').live('change', function () {
$('.paste-option select').val($(this).val());
});
/* Resize Textarea according to content */
$('#content').elastic();
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/* Display bottom paste option buttons when needed */
$('#content').live('keyup change', function () {
if ($('#content').height() < 400) {
$('.paste-option.down').remove();
} else {
if ($('.paste-option').length === 1) {
$('.paste-option').clone().addClass('down').appendTo('form.well');
}
}
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});
/* Display previous pastes */
if (zerobin.support.localStorage) {
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var $container = $('.previous-pastes'),
pastes = zerobin.getPreviousPastes();
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if (pastes.length) {
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$.getScript("/static/js/vizhash.min.js").done(function (script, textStatus) {
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$container.find('.item').remove();
$.each(zerobin.getPreviousPastes(), function (i, paste) {
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var $li = $('<li class="item"></li>').appendTo($container);
var $link = $('<a></a>').attr('href', paste.link)
.text(paste.prefix + paste.displayDate)
.appendTo($li);
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if (vizhash.supportCanvas) {
var pasteId = zerobin.getPasteId(paste.link);
var vhash = vizhash.canvasHash(pasteId, 24, 24).canvas;
$link.prepend($(vhash).addClass('vhash'));
}
// hightlite the current link and make sure clicking the link
// does redirect to the page
if (paste.link.replace(/#[^#]+/, '') === window.location.pathname) {
$li.addClass('active');
$link.click(function () {
window.location = $link.attr('href');
window.location.reload();
});
}
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});
});
}
}
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/* Event handler for "clone paste" button */
$('.btn-clone').click(function (e) {
e.preventDefault();
$('.submit-form').show();
$('.paste-form').hide();
$('#content').val(zerobin.getPasteContent()).trigger('change');
});
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$('.clone .btn-danger').click(function (e) {
e.preventDefault();
$('.submit-form').hide();
$('.paste-form').show();
});
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/* Upload file using HTML5 File API */
if (zerobin.support.fileUpload) {
var $buttonOverlay = $('#file-upload');
var $button = $('.btn-upload');
try {
$button.val('Uploading...');
$button.prop('disabled', true);
$buttonOverlay.change(function () {
zerobin.upload(this.files);
});
} catch (e) {
zerobin.message('error', 'Could no upload the file', 'Error');
$button.val('Upload File');
$button.prop('disabled', false);
}
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$button.prop('disabled', false);
$button.val('Upload File');
$buttonOverlay.mouseover(mkcb($(this).css, 'cursor', 'pointer'));
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// Implements drag & drop upload
$('#content').bind('drop', zerobin.handleDrop);
$('#content').bind('dragover', zerobin.handleDragOver);
$('#content').bind('dragleave', zerobin.handleDragLeave);
}
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/* Alerts */
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$(".close").live('click', function (e) {
e.preventDefault();
$(this).parent().fadeOut();
});
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/* Parse obfuscaded emails and make them usable */
$('.email-link').each(function (i, elem) {
var $obfuscatedEmail = $(this);
var address = $obfuscatedEmail.attr('title').replace('__AT__', '@');
var text = $obfuscatedEmail.text().replace('__AT__', '@');
var $plainTextEmail = $('<a href="mailto:' + address + '">' + text + '</a>');
$obfuscatedEmail.replaceWith($plainTextEmail);
});
/* Show the page using javascript. Non js enabled browser will see an
error message */
$('#wrap-content').each(function (i, elem) {
$(elem).show();
});
/* Remove expired pasted from history */
if (zerobin.support.history && zerobin.paste_not_found) {
var paste_id = zerobin.getPasteId();
var keys = zerobin.getLocalStorageKeys();
$.each(keys, function (i, key) {
if (localStorage[key].indexOf(paste_id) !== -1) {
localStorage.removeItem(key);
return false;
}
});
}
/* Force text coloration when clickin on link */
$("#force-coloration").live("click", function (e) {
e.preventDefault();
$('#paste-content').addClass('linenums');
$(this).die(e).text('Applying coloration');
prettyPrint();
$(this).remove();
});
/* Send the paste by email */
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$('#email-link').click(function() {
zerobin.getTinyURL(window.location.toString(), function(tinyurl) {
document.location.href= 'mailto:friend@example.com?body=' + tinyurl;
2013-01-24 12:53:04 +04:00
});
return false;
});
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}); /* End of "document ready" jquery callback */
})(); /* End of self executing function */