spryvalidationcheckbox.js

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/* SpryValidationCheckbox.js - Revision: Spry Preview Release 1.4 */

// Copyright (c) 2006. Adobe Systems Incorporated.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//   * Neither the name of Adobe Systems Incorporated nor the names of its
//     contributors may be used to endorse or promote products derived from this
//     software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

var Spry;
if (!Spry) Spry = {};
if (!Spry.Widget) Spry.Widget = {};

Spry.Widget.ValidationCheckbox = function(element, opts)
{
	this.init(element);
	
	Spry.Widget.Utils.setOptions(this, opts);

	// set validateOn flags
	var validateOn = ['submit'].concat(this.validateOn || []);
	validateOn = validateOn.join(",");
	this.validateOn = 0 | (validateOn.indexOf('submit') != -1 ? Spry.Widget.ValidationCheckbox.ONSUBMIT : 0);
	this.validateOn = this.validateOn | (validateOn.indexOf('blur') != -1 ? Spry.Widget.ValidationCheckbox.ONBLUR : 0);
	this.validateOn = this.validateOn | (validateOn.indexOf('change') != -1 ? Spry.Widget.ValidationCheckbox.ONCHANGE : 0);
	
	// sanity checks
	if (!isNaN(this.minSelections)) {
		this.minSelections = (this.minSelections > 0)? parseInt(this.minSelections, 10): null;
	}
	if (!isNaN(this.maxSelections)) {
		this.maxSelections = (this.maxSelections > 0)? parseInt(this.maxSelections, 10): null;
	}

	// Unfortunately in some browsers like Safari, the Stylesheets our
	// page depends on may not have been loaded at the time we are called.
	// This means we have to defer attaching our behaviors until after the
	// onload event fires, since some of our behaviors rely on dimensions
	// specified in the CSS.

	if (Spry.Widget.ValidationCheckbox.onloadDidFire)
		this.attachBehaviors();
	else 
		Spry.Widget.ValidationCheckbox.loadQueue.push(this);
};

Spry.Widget.ValidationCheckbox.ONCHANGE = 1;
Spry.Widget.ValidationCheckbox.ONBLUR = 2;
Spry.Widget.ValidationCheckbox.ONSUBMIT = 4;

Spry.Widget.ValidationCheckbox.prototype.init = function(element)
{
	this.element = this.getElement(element);
	this.checkboxElements = null;
	this.form = null;
	this.event_handlers = [];
	
	 // this.element can be either the container (<span>)
	 // or the <input type="checkbox"> element, when no error messages are used.
	this.hasFocus = false;
	this.requiredClass = "checkboxRequiredState";
	this.minSelectionsClass = "checkboxMinSelectionsState";
	this.maxSelectionsClass = "checkboxMaxSelectionsState";
	this.focusClass = "checkboxFocusState";
	this.validClass = "checkboxValidState";
	
	this.isRequired = true;
	
	this.minSelections = null;
	this.maxSelections = null;
	
	this.validateOn = ["submit"];  // change, submit (blur ?)
};

Spry.Widget.ValidationCheckbox.prototype.destroy = function() {
	for (var i=0; i<this.event_handlers.length; i++) {
		Spry.Widget.Utils.removeEventListener(this.event_handlers[i][0], this.event_handlers[i][1], this.event_handlers[i][2], false);
	}
	try { delete this.element; } catch(err) {}
	for(var i=0; i<this.checkboxElements.length; i++) {
		try { delete this.checkboxElements[i];} catch(err) {}
	}
	try { delete this.checkboxElements; } catch(err) {}
	try { delete this.form; } catch(err) {}
	try { delete this.event_handlers; } catch(err) {}

	var q = Spry.Widget.Form.onSubmitWidgetQueue;
	var qlen = q.length;
	for (var i = 0; i < qlen; i++) {
		if (q[i] == this) {
			q.splice(i, 1);
			break;
		}
	}
};

Spry.Widget.ValidationCheckbox.onloadDidFire = false;
Spry.Widget.ValidationCheckbox.loadQueue = [];

Spry.Widget.ValidationCheckbox.prototype.getElement = function(ele)
{
	if (ele && typeof ele == "string")
		return document.getElementById(ele);
	return ele;
};

Spry.Widget.ValidationCheckbox.processLoadQueue = function(handler)
{
	Spry.Widget.ValidationCheckbox.onloadDidFire = true;
	var q = Spry.Widget.ValidationCheckbox.loadQueue;
	var qlen = q.length;
	for (var i = 0; i < qlen; i++)
		q[i].attachBehaviors();
};

Spry.Widget.ValidationCheckbox.addLoadListener = function(handler)
{
	if (typeof window.addEventListener != 'undefined')
		window.addEventListener('load', handler, false);
	else if (typeof document.addEventListener != 'undefined')
		document.addEventListener('load', handler, false);
	else if (typeof window.attachEvent != 'undefined')
		window.attachEvent('onload', handler);
};

Spry.Widget.ValidationCheckbox.addLoadListener(Spry.Widget.ValidationCheckbox.processLoadQueue);
Spry.Widget.ValidationCheckbox.addLoadListener(function(){
	Spry.Widget.Utils.addEventListener(window, "unload", Spry.Widget.Form.destroyAll, false);
});

Spry.Widget.ValidationCheckbox.prototype.attachBehaviors = function()
{
	// find the INPUT type="checkbox" element(s) inside current container
	if (this.element.nodeName == "INPUT") {
		this.checkboxElements = [this.element];
	} else {
		this.checkboxElements = this.getCheckboxes();
	}
	if (this.checkboxElements) {
		var self = this;
		this.event_handlers = [];

		var qlen = this.checkboxElements.length;
		for (var i = 0; i < qlen; i++) {
			// focus
			this.event_handlers.push([this.checkboxElements[i], "focus", function(e) { return self.onFocus(e); }]);
			// blur
			this.event_handlers.push([this.checkboxElements[i], "blur", function(e) { return self.onBlur(e); }]);
			// add click instead of onChange
			if (this.validateOn & Spry.Widget.ValidationCheckbox.ONCHANGE) {
				this.event_handlers.push([this.checkboxElements[i], "click", function(e) { return self.onClick(e); }]);
			}
		}

		for (var i=0; i<this.event_handlers.length; i++) {
			Spry.Widget.Utils.addEventListener(this.event_handlers[i][0], this.event_handlers[i][1], this.event_handlers[i][2], false);
		}

		// submit
		this.form = Spry.Widget.Utils.getFirstParentWithNodeName(this.element, "FORM");
		if (this.form) {
			// if no "onSubmit" handler has been attached to the current form, attach one
			if (!this.form.attachedSubmitHandler && !this.form.onsubmit) {
				this.form.onsubmit = function(e) { e = e || event; return Spry.Widget.Form.onSubmit(e, e.srcElement || e.currentTarget) };
				this.form.attachedSubmitHandler = true;                 
			}
			if (!this.form.attachedResetHandler) {
				Spry.Widget.Utils.addEventListener(this.form, "reset", function(e) { e = e || event; return Spry.Widget.Form.onReset(e, e.srcElement || e.currentTarget) }, false);
				this.form.attachedResetHandler = true;                 
			}
			// add the currrent widget to the "onSubmit" check queue;
			Spry.Widget.Form.onSubmitWidgetQueue.push(this);
		}
	}
	
};

Spry.Widget.ValidationCheckbox.prototype.getCheckboxes = function() {
	var arrCheckboxes;
	var elements  = this.element.getElementsByTagName("INPUT");
	if (elements.length) {
		arrCheckboxes = [];
		var qlen = elements.length;
		for (var i = 0; i < qlen; i++) {
			if (elements[i].type == "checkbox") {
				arrCheckboxes.push(elements[i]);
			}
		}
		return arrCheckboxes;
	}
	return null;
}

Spry.Widget.ValidationCheckbox.prototype.addClassName = function(ele, className)
{
	if (!ele || !className || (ele.className && ele.className.search(new RegExp("\\b" + className + "\\b")) != -1))
		return;
	ele.className += (ele.className ? " " : "") + className;
};

Spry.Widget.ValidationCheckbox.prototype.removeClassName = function(ele, className)
{
	if (!ele || !className || (ele.className && ele.className.search(new RegExp("\\b" + className + "\\b")) == -1))
		return;
	ele.className = ele.className.replace(new RegExp("\\s*\\b" + className + "\\b", "g"), "");
};



Spry.Widget.ValidationCheckbox.prototype.onFocus = function(e)
{
	var eventCheckbox = (e.srcElement != null) ? e.srcElement : e.target;
 	if (eventCheckbox.disabled) return;
 	
	this.hasFocus = true;
	this.addClassName(this.element, this.focusClass);
};

Spry.Widget.ValidationCheckbox.prototype.onBlur = function(e)
{
	var eventCheckbox = (e.srcElement != null) ? e.srcElement : e.target;
	if (eventCheckbox.disabled) return;
	
	this.hasFocus = false;