jquery.realperson.js
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/* http://keith-wood.name/realPerson.html
Real Person Form Submission for jQuery v1.0.1.
Written by Keith Wood (kwood{at}iinet.com.au) June 2009.
Dual licensed under the GPL (http://dev.jquery.com/browser/trunk/jquery/GPL-LICENSE.txt) and
MIT (http://dev.jquery.com/browser/trunk/jquery/MIT-LICENSE.txt) licenses.
Please attribute the author if you use it. */
(function($) { // Hide scope, no $ conflict
var PROP_NAME = 'realPerson';
/* Real person manager. */
function RealPerson() {
this._defaults = {
length: 6, // Number of characters to use
includeNumbers: false, // True to use numbers as well as letters
regenerate: 'Click to change', // Instruction text to regenerate
hashName: '{n}Hash' // Name of the hash value field to compare with,
// use {n} to substitute with the original field name
};
}
var CHARS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
var DOTS = [
[' * ', ' * * ', ' * * ', ' * * ', ' ***** ', '* *', '* *'],
['****** ', '* *', '* *', '****** ', '* *', '* *', '****** '],
[' ***** ', '* *', '* ', '* ', '* ', '* *', ' ***** '],
['****** ', '* *', '* *', '* *', '* *', '* *', '****** '],
['*******', '* ', '* ', '**** ', '* ', '* ', '*******'],
['*******', '* ', '* ', '**** ', '* ', '* ', '* '],
[' ***** ', '* *', '* ', '* ', '* ***', '* *', ' ***** '],
['* *', '* *', '* *', '*******', '* *', '* *', '* *'],
['*******', ' * ', ' * ', ' * ', ' * ', ' * ', '*******'],
[' *', ' *', ' *', ' *', ' *', '* *', ' ***** '],
['* *', '* ** ', '* ** ', '** ', '* ** ', '* ** ', '* *'],
['* ', '* ', '* ', '* ', '* ', '* ', '*******'],
['* *', '** **', '* * * *', '* * *', '* *', '* *', '* *'],
['* *', '** *', '* * *', '* * *', '* * *', '* **', '* *'],
[' ***** ', '* *', '* *', '* *', '* *', '* *', ' ***** '],
['****** ', '* *', '* *', '****** ', '* ', '* ', '* '],
[' ***** ', '* *', '* *', '* *', '* * *', '* * ', ' **** *'],
['****** ', '* *', '* *', '****** ', '* * ', '* * ', '* *'],
[' ***** ', '* *', '* ', ' ***** ', ' *', '* *', ' ***** '],
['*******', ' * ', ' * ', ' * ', ' * ', ' * ', ' * '],
['* *', '* *', '* *', '* *', '* *', '* *', ' ***** '],
['* *', '* *', ' * * ', ' * * ', ' * * ', ' * * ', ' * '],
['* *', '* *', '* *', '* * *', '* * * *', '** **', '* *'],
['* *', ' * * ', ' * * ', ' * ', ' * * ', ' * * ', '* *'],
['* *', ' * * ', ' * * ', ' * ', ' * ', ' * ', ' * '],
['*******', ' * ', ' * ', ' * ', ' * ', ' * ', '*******'],
[' *** ', ' * * ', '* *', '* *', '* *', ' * * ', ' *** '],
[' * ', ' ** ', ' * * ', ' * ', ' * ', ' * ', '*******'],
[' ***** ', '* *', ' *', ' * ', ' ** ', ' ** ', '*******'],
[' ***** ', '* *', ' *', ' ** ', ' *', '* *', ' ***** '],
[' * ', ' ** ', ' * * ', ' * * ', '*******', ' * ', ' * '],
['*******', '* ', '****** ', ' *', ' *', '* *', ' ***** '],
[' **** ', ' * ', '* ', '****** ', '* *', '* *', ' ***** '],
['*******', ' * ', ' * ', ' * ', ' * ', ' * ', '* '],
[' ***** ', '* *', '* *', ' ***** ', '* *', '* *', ' ***** '],
[' ***** ', '* *', '* *', ' ******', ' *', ' * ', ' **** ']];
$.extend(RealPerson.prototype, {
/* Class name added to elements to indicate already configured with real person. */
markerClassName: 'hasRealPerson',
/* Override the default settings for all real person instances.
@param settings (object) the new settings to use as defaults
@return (RealPerson) this object */
setDefaults: function(settings) {
$.extend(this._defaults, settings || {});
return this;
},
/* Attach the real person functionality to an input field.
@param target (element) the control to affect
@param settings (object) the custom options for this instance */
_attachRealPerson: function(target, settings) {
target = $(target);
if (target.hasClass(this.markerClassName)) {
return;
}
target.addClass(this.markerClassName);
var inst = {settings: $.extend({}, this._defaults)};
$.data(target[0], PROP_NAME, inst);
this._changeRealPerson(target, settings);
},
/* Reconfigure the settings for a real person control.
@param target (element) the control to affect
@param settings (object) the new options for this instance or
(string) an individual property name
@param value (any) the individual property value (omit if settings is an object) */
_changeRealPerson: function(target, settings, value) {
target = $(target);
if (!target.hasClass(this.markerClassName)) {
return;
}
settings = settings || {};
if (typeof settings == 'string') {
var name = settings;
settings = {};
settings[name] = value;
}
var inst = $.data(target[0], PROP_NAME);
$.extend(inst.settings, settings);
target.prevAll('.realperson-challenge,.realperson-hash').remove().end().
before(this._generateHTML(target, inst));
},
/* Generate the additional content for this control.
@param target (jQuery) the input field
@param inst (object) the current instance settings
@return (string) the additional content */
_generateHTML: function(target, inst) {
var text = '';
for (var i = 0; i < inst.settings.length; i++) {
text += CHARS.charAt(Math.floor(Math.random() *
(inst.settings.includeNumbers ? 36 : 26)));
}
var html = '<div class="realperson-challenge"><div class="realperson-text">';
for (var i = 0; i < DOTS[0].length; i++) {
for (var j = 0; j < text.length; j++) {
html += DOTS[CHARS.indexOf(text.charAt(j))][i].replace(/ /g, ' ') +
' ';
}
html += '<br>';
}
html += '</div><div class="realperson-regen">' + inst.settings.regenerate +
'</div></div><input type="hidden" class="realperson-hash" name="' +
inst.settings.hashName.replace(/\{n\}/, target.attr('name')) +
'" value="' + this._hash(text) + '">';
return html;
},
/* Remove the real person functionality from a control.
@param target (element) the control to affect */
_destroyRealPerson: function(target) {
target = $(target);
if (!target.hasClass(this.markerClassName)) {
return;
}
target.removeClass(this.markerClassName).
prevAll('.realperson-challenge,.realperson-hash').remove();
$.removeData(target[0], PROP_NAME);
},
/* Compute a hash value for the given text.
@param value (string) the text to hash
@return the corresponding hash value */
_hash: function(value) {
var hash = 5381;
for (var i = 0; i < value.length; i++) {
hash = ((hash << 5) + hash) + value.charCodeAt(i);
}
return hash;
}
});
/* Attach the real person functionality to a jQuery selection.
@param command (string) the command to run (optional, default 'attach')
@param options (object) the new settings to use for these instances (optional)
@return (jQuery) for chaining further calls */
$.fn.realperson = function(options) {
var otherArgs = Array.prototype.slice.call(arguments, 1);
return this.each(function() {
if (typeof options == 'string') {
$.realperson['_' + options + 'RealPerson'].
apply($.realperson, [this].concat(otherArgs));
}
else {
$.realperson._attachRealPerson(this, options || {});
}
});
};
/* Initialise the real person functionality. */
$.realperson = new RealPerson(); // singleton instance
$('.realperson-challenge').live('click', function() {
$(this).next().next().realperson('change');
});
})(jQuery);