*   A quick hash to prevent there from being two AJAX requests for a

 *   given course at one time.

 */

var course_ajax_requests = [];

/**

 * \brief

 *   The course number which contains nothing.

 *

 * To avoid having a user need to click the ``Add course'' button, we

 * keep a course added at the end of the list of courses. If this

 * variable is -1, it indicates that no such free course exists. If it

 * is zero or greater, that number is the class which is the free one.

 */

var slate_permutate_course_free = -1;

/**

 * \brief

 *   Whether or not we should divulge the existence of course slots to

 *   the user.

 *

 * This will automatically be set to true as soon as a course

 * utilizing multiple slots is added using autocomplete.

 */

/*

 * General Input Functions

 */

/**

 * Outputs an <option/> element. It will inlcude selected="selected"

 * if the value param equals the test_value param.

 */

function genOptionHtml(value, content, test_value)

{

    var selected = ' selected="selected"';

    if (value != test_value)

	selected = '';

    return '<option value="' + value + '"' + selected + '>' + content + "</option>\n";

}

/** Add tooltips for user guidance */

function addTips()

{

  var tr = jQuery('tr');

  var td = tr.eq(tr.length-1);

	jQuery.each(data.dependencies, function(i, dep) {

			/* Gracefully deprecate the old crawler's JSON format. */

			if (dep['class'])

			    dep.course = dep['class'];

		var new_course_num = add_class_n(dep.course, dep['title'] ? dep['title'] : '');

			add_sections(new_course_num, dep);

		    });

}

/**

 * \brief

 *   Adds an identifier for a course slot.

 *

 * \param course_i

 *   The javascript index of the course to which a slot is being

 *   added.

 * \param slot_id

 *   The idenfifier of the slot.

 */

function course_add_slot_row(course_i, slot_id)

{

    var extra_classes = '';

    {

	var aclass;

	/*

	 * Then check if this course has multiple slots and we should

	 * enable displaying them to the user.

	 */

	aclass = jQuery('.' + safe_css_class('class' + course_i) + '.section .section-slot-entry');

	if (aclass.length && aclass.val() != slot_id)

	{

	}

    }

	extra_classes += ' tr-slot-id-hidden';

    jQuery('tr.class' + course_i + ':last').after(

	'<tr class="class' + course_i + ' tr-slot-id ' + safe_css_class('slot-' + slot_id) + extra_classes + '">\n' +

	    '  <td><span /></td>\n' +

	    '  <td colspan="10"><span class="slot-id-text" /></td>\n' +

	    '  <td colspan="2"><span /></td>\n' +

	    '</tr>\n'

    );

    jQuery('tr.class' + course_i + ':last .slot-id-text').text('The following are ' + slot_id + ' sections and will be scheduled as a group.');

}

/**

 * \brief

 */

{

}

/**

 * \brief

 *   Adds a new class to the input.

 *

 * \param course_id

 *   The course_id.

 * \param title

 *   The human-friendly course title.

 * \return

 *   The javascript-local course entry identifying number.

 */

function add_class_n(course_id, title)

{

    /*

     * If we're adding a course entry form with preadded

     * content, first remove the empty course.

     */

    if (course_id.length && slate_permutate_course_free != -1)

	course_remove(slate_permutate_course_free);

    sectionsOfClass[classNum] = 0; // Initialize at 0

    course_ajax_requests[classNum] = false;