// SpryUtils.js - version 0.3 - Spry Pre-Release 1.6.1

//

// Copyright (c) 2007. 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.Utils) Spry.Utils = {};





Spry.Utils.submitForm = function(form, callback, opts)

{

	if (!form)

		return true;



	if ( typeof form == 'string' )

		form = Spry.$(form) || document.forms[form];



	var frmOpts = {};

	frmOpts.method = form.getAttribute('method');

	frmOpts.url = form.getAttribute('action') || document.location.href;

	frmOpts.enctype = form.getAttribute('enctype');



	Spry.Utils.setOptions(frmOpts, opts);



	var submitData = Spry.Utils.extractParamsFromForm(form, frmOpts.elements);

	if (frmOpts.additionalData)

		submitData += "&" + frmOpts.additionalData;



	if (!frmOpts.enctype || frmOpts.enctype.toLowerCase() != 'multipart/form-data')

	{

		// Ajax submission of a form doesn't work for multipart/form-data!

		frmOpts.method = (frmOpts.method && frmOpts.method.toLowerCase() == "post") ? 'POST' : 'GET';

		if (frmOpts.method == "GET")

		{

			// Data will be submitted in the url.

			if (frmOpts.url.indexOf('?') == -1)

				frmOpts.url += '?';

			else

				frmOpts.url += '&';

			frmOpts.url += submitData;

		}

		else

		{

			// Send Content-Type header.

			if (!frmOpts.headers) frmOpts.headers = {};

			if (!frmOpts.headers['Content-Type'] || frmOpts.headers['Content-Type'].indexOf("application/x-www-form-urlencoded") ==-1 )

				frmOpts.headers['Content-Type'] = 'application/x-www-form-urlencoded';



			// Set the postData

			frmOpts.postData = submitData;

		}



		Spry.Utils.loadURL(frmOpts.method, frmOpts.url, true, callback, frmOpts);

		return false;

	}



	// Native submission when 'multipart/form-data' is used.

	return true;

};





Spry.Utils.extractParamsFromForm = function (form, elements)

{

	if (!form)

		return '';



	if ( typeof form == 'string' )

		form = document.getElementById(form) || document.forms[form];



	var formElements;

	if (elements)

		formElements = ',' + elements.join(',') + ',';



	var compStack = new Array(); // key=value pairs



	var el;

	for (var i = 0; i < form.elements.length; i++ )

	{

		el = form.elements[i];

		if (el.disabled || !el.name)

		{

			// Don't submit disabled elements.

			// Don't submit elements without name.

			continue;

		}



		if (!el.type)

		{

			// It seems that this element doesn't have a type set,

			// so skip it.

			continue;

		}



		if (formElements && formElements.indexOf(',' + el.name + ',')==-1)

			continue;



		switch(el.type.toLowerCase())

		{

			case 'text':

			case 'password':

			case 'textarea':

			case 'hidden':

			case 'submit':

				compStack.push(encodeURIComponent(el.name) + '=' + encodeURIComponent(el.value));

				break;

			case 'select-one':

				var value = '';

				var opt;

				if (el.selectedIndex >= 0) {

					opt = el.options[el.selectedIndex];

					value = opt.value || opt.text;

				}

				compStack.push(encodeURIComponent(el.name) + '=' + encodeURIComponent(value));

				break;

			case 'select-multiple':

				for (var j = 0; j < el.length; j++)

				{

					if (el.options[j].selected)

					{

						value = el.options[j].value || el.options[j].text;

						compStack.push(encodeURIComponent(el.name) + '=' + encodeURIComponent(value));

					}

				}

				break;

			case 'checkbox':

			case 'radio':

				if (el.checked)

					compStack.push(encodeURIComponent(el.name) + '=' + encodeURIComponent(el.value));

				break;

			default:

			// file, button, reset

			break;

			}

		}

	return compStack.join('&');

};