/*

	*	File:		ecms_system.js

	*	Name:		Expandable/Collapsible Menu System

	*	Date:		2001-10-06



	*	Author:		Ben Boyle

	*	Email:		bboyle@inspire.server101.com



	*	Platform:	all javascript browsers

	*	Namespace:	all variables and functions prefixed with "ECMS_"



	System functions (cross-platform) shared by menu system.

	Dynamically loads correct platform library (IE, Netscape, default) to handle menu.

	All configuration handled through ECMS_config.js and CSS classes.



*/





// LOADER - loads browser specific version

if (document.getElementById) {

	// standard - Netscape6, IE 4/5

	document.writeln('<script language="Javascript" type="text\/javascript" src="ecms_system_id.js"><\/script>');

} else if (document.layers) {

	// layers (Netscape 4, 3)

	document.writeln('<script language="Javascript" type="text\/javascript" src="ecms_system_layer.js"><\/script>');

} else {

	// default - uses UL/LI display

	document.writeln('<script language="Javascript" type="text\/javascript" src="ecms_system_default.js"><\/script>');

}





/*

 ECMS_config.js variables

 - The following variables can all be user-defined in ECMS_config.js

*/



// expand/collapse images

var ECMS_image_bullet = new Image();

var ECMS_image_collapsed = new Image();

var ECMS_image_expanded = new Image();



// CSS classes

var ECMS_class_bullet = 'bullet';

var ECMS_class_collapsed = 'collapsed';

var ECMS_class_expanded = 'expanded';



// menu indent level

var ECMS_menu_indent = 0;



// menu height level (used by netscape to ensure expandable space)

var ECMS_menu_height = 0;



// display title (or name) in status bar

var ECMS_status_display = false;



// repeat links with images/text

var ECMS_repeat_links = false;



// automatically expand (onfocus, onmouseover)

var ECMS_auto_expand = false;

var ECMS_auto_expand_delay = 0;



// collapse other menu trees when expanding

var ECMS_collapse_on_expand = '';



/*

 end ECMS_config.js variables

*/





// menu

var ECMS_menu_tree = new Array();

var ECMS_menu_tree_index = 0;

// caches

var ECMS_image_cache = new Array();

var ECMS_class_cache = new Array();

// auto expand timer

var	ECMS_auto_expand_timer;





// new menu_tree object

function ECMS_menu_node(id, name, url, target, expanded, title, image) {

	this.id			= id.toString();

	this.expanded	= (expanded ? true : false);

	this.name		= name;

	this.url		= (url ? url : null);

	this.title		= (title ? title : name);

	this.target		= (target ? target : null);

	this.tree		= ECMS_menu_tree_index;

	this.expandedi	= (ECMS_image_expanded ? ECMS_find_image(ECMS_image_expanded) : null);

	this.collapsedi	= (ECMS_image_collapsed ? ECMS_find_image(ECMS_image_collapsed) : null);

	this.bulleti	= (ECMS_image_bullet ? ECMS_find_image(ECMS_image_bullet) : null);

	this.expandedc	= (ECMS_class_expanded ? ECMS_find_class(ECMS_class_expanded) : null);

	this.collapsedc	= (ECMS_class_collapsed ? ECMS_find_class(ECMS_class_collapsed) : null);

	this.bulletc	= (ECMS_class_bullet ? ECMS_find_class(ECMS_class_bullet) : null);

}





// adds a node to the end of the menu tree

function ECMS_add_item(level, name, url, target, expanded, title, node) {

	if (!node) {

		if (!ECMS_menu_tree[ECMS_menu_tree_index]) {

			// first item

			ECMS_menu_tree[ECMS_menu_tree_index] = new ECMS_menu_node(0, name, url, target, expanded, title);

			// menu settings

			ECMS_menu_tree[ECMS_menu_tree_index].menu_height = ECMS_menu_height;

			ECMS_menu_tree[ECMS_menu_tree_index].status_display = ECMS_status_display;

			ECMS_menu_tree[ECMS_menu_tree_index].repeat_links = ECMS_repeat_links;

			ECMS_menu_tree[ECMS_menu_tree_index].auto_expand = ECMS_auto_expand;

			ECMS_menu_tree[ECMS_menu_tree_index].auto_expand_delay = ECMS_auto_expand_delay;

			ECMS_menu_tree[ECMS_menu_tree_index].collapse_on_expand = ECMS_collapse_on_expand;

			return;

		} else {

	 		node = ECMS_menu_tree[ECMS_menu_tree_index];

		}

	}



	// end of level

	while (node.next) {

		node = node.next;

	}



	if (level == 0) {

		// add to this level

		var id = node.id.lastIndexOf('-');

		if (id != -1) {

			var inc = node.id.substring(id + 1);

			inc++;

			id = node.id.substring(0, id) + '-' + inc;

		} else {

			id = parseInt(node.id) + 1;

		}

		node.next = new ECMS_menu_node(id, name, url, target, expanded, title);

	} else if (node.child) {

		// recurse on next level

		ECMS_add_item(level - 1, name, url, target, expanded, title, node.child);

	} else {

		// new child

		node.child = new ECMS_menu_node(node.id + '-0', name, url, target, expanded, title);

	}

}





// include a class

function ECMS_include_class(i) {

	var cl = ECMS_class_cache[i];

	return (cl ? ' class="' + cl + '"' : '');

}



// include a image

function ECMS_include_image(node, i) {

	var image = ECMS_image_cache[i];

	if (image) {

		var alt = (node.child ? node.name + ' ' + image.alt : image.alt);

		return '<img src="' + image.src + '" ' + (image.width ? 'width="' + image.width + ' ' : '') + (image.height ? 'height="' + image.height + ' ' : '') + 'border="0" alt="' + alt + '" ID="ECMS_' + node.tree + '|' + node.id + '_IMG" />';

	}

	return '';

}

// include a bullet image

function ECMS_include_bullet_image(node) {

	var image = ECMS_include_image(node, node.bulleti);

	// link the image

	if (node.url && ECMS_menu_tree[node.tree].repeat_links) {

		image = ECMS_include_node_link(node, image);

	}

	return image;

}



// include control image

function ECMS_include_control_image(node, image) {

	return ECMS_include_control_link(node, ECMS_include_image(node, image));

}



// include control link

function ECMS_include_control_link(node, text) {

	return '<a href="javascript:ECMS_control_click(' + node.tree + ', \'' + node.id + '\');" title="' + node.title + '" target="_self"' + ECMS_include_behaviours(node) + '>' + text + '</a>';

}



// include behaviours

function ECMS_include_behaviours(node, text) {

	var f = ''; // focus handler

	var f = ''; // blur handler

	var menu = ECMS_menu_tree[node.tree];



	// status

	if (menu.status_display) {

		f = 'window.status = \'' + node.title + '\';';

		b = 'window.status = \'\';';

	}



	// auto expand

	if (menu.auto_expand && node.child) {

		f += 'ECMS_set_auto_expand(' + node.tree + ', \'' + node.id + '\');';

		b += 'ECMS_set_auto_expand();';

	}

	var t = 'return true;';



	return (f ? ' onfocus="' + f + t +'" onblur="' + b + t +'" onmouseover="' + f + t +'" onmouseout="' + b + t +'"' : '');

}



// include a node link

function ECMS_include_node_link(node, display) {

	var text = (display ? display : node.name);

	if (node.url) {

		text = '<a href="' + node.url + '" title="' + node.title + '"' + (node.target ? ' target="' + node.target + '"' : '') + ECMS_include_behaviours(node) + '>' + text + '</a>';

	} else if (node.child && ECMS_menu_tree[node.tree].repeat_links) {

		text = ECMS_include_control_link(node, node.name);

	}



	return text;

}



// include node

function ECMS_include_node(node, cl, i) {

	var	text = '<table border="0" cellpadding="0" cellspacing="0"><tr>';

	text += '<td valign="top">' + i + '&nbsp;</td>';

	text += '<td valign="top"' + ECMS_include_class(cl) + ' id="ECMS_' + node.tree + '|' + node.id + '_CL">' + ECMS_include_node_link(node) + '</td>';

	text += '</tr></table>';



	return text;

}



// find a node with a given id

function ECMS_find_node(tree, id) {

	var node = ECMS_menu_tree[tree];

	var level = id.toString().split('-');



	for (var i = 0; i < level.length; i++) {

		for (var j = level[i]; j > 0; j--) {

			node = node.next;

		}

		if (i + 1 < level.length) {

			node = node.child;

		}

	}



	return node;

}





// find a node with a given name

function ECMS_find_node_name(tree, name) {

	if (!tree) {

		tree = 0;

	}

	return ECMS_find_node_name_in_tree(ECMS_menu_tree[tree], name);

}

function ECMS_find_node_name_in_tree(node, name) {



	// found it (only if it is a parent node)

	if (node.child && node.name == name) {

		return node;

	}

	

	// recurse: check expanded children

	if (node.child && node.expanded) {

		var check = ECMS_find_node_name_in_tree(node.child, name);

		if (check) {

			return check;

		}

	}



	// recurse: check next nodes

	if (node.next) {

		var check = ECMS_find_node_name_in_tree(node.next, name);

		if (check) {

			return check;

		}

	}



	return null;

}





// control click to expand/collapse menu

function ECMS_control_click(tree, node, image) {

	node = ECMS_find_node(tree, node);

	ECMS_control_node(node, !node.expanded, image);

}





// expand a node based on name

function ECMS_expand(name, tree) {

	ECMS_control_node(ECMS_find_node_name(tree, name), 1);

}





// expand a node based on id

function ECMS_expand_id(tree, id) {

	ECMS_control_node(ECMS_find_node(tree, id), 1);

}





// collapse a node based on its name

function ECMS_collapse(name, tree) {

	ECMS_control_node(ECMS_find_node_name(tree, name), 0);

}





// expand all folders

function ECMS_expand_all(tree) {

	var collapse_on_expand = ECMS_menu_tree[tree].collapse_on_expand;

	// turn of auto collapsing

	ECMS_menu_tree[tree].collapse_on_expand = false;

	// expand all

	ECMS_expand_tree(ECMS_menu_tree[tree]);

	// restore auto collapsing setting

	ECMS_menu_tree[tree].collapse_on_expand = collapse_on_expand;

}





// expand a menu tree

function ECMS_expand_tree(node) {

	if (node.child) {

		ECMS_expand_tree(node.child);

		ECMS_control_node(node, 1);

	}



	// recurse

	if (node.next) {

		ECMS_expand_tree(node.next);

	}

}





// collapse all folders (exclude node path)

function ECMS_collapse_all(tree, path) {

	ECMS_collapse_tree(ECMS_menu_tree[tree], path);

}





// collapse a menu tree (exclude those in a given path)

function ECMS_collapse_tree(node, path) {

	if (node.child) {

		if (!path || path.id.indexOf(node.id) != 0) {

			ECMS_control_node(node, 0);

		}

		ECMS_collapse_tree(node.child, path);

	}

	// recurse

	if (node.next) {

		ECMS_collapse_tree(node.next, path);

	}

}





// control click to expand/collapse menu

function ECMS_control_node(node, expand) {

	if (expand) {

		if (!node.expanded) {

			// collapse other menus?

			var collapse = ECMS_menu_tree[node.tree].collapse_on_expand;

			if (collapse) {

				// collapse other trees

				if (collapse == 'all') {

					for (var i = 0; i < ECMS_menu_tree.length; i++) {

						if (i != node.tree) {

							ECMS_collapse_all(i);

						}

					}

				}

				// collapse other items within this tree

				ECMS_collapse_all(node.tree, node);

			}

			node.expanded = true;

			ECMS_PF_expand(node);

		}

	} else {

		if (node.expanded) {

			node.expanded = false;

			ECMS_PF_collapse(node);

		}

	}

}





// auto expand

function ECMS_set_auto_expand(tree, node) {

	if (!node && ECMS_auto_expand_timer) {

		clearTimeout(ECMS_auto_expand_timer);

	} else if (ECMS_menu_tree[tree].auto_expand) {

		ECMS_auto_expand_timer = setTimeout('ECMS_expand_id(' + tree + ', \'' + node + '\');', ECMS_menu_tree[tree].auto_expand_delay);

	}

}





// find image - caches images

function ECMS_find_image(image) {

	var i = 0;

	while (i < ECMS_image_cache.length) {

		if (ECMS_image_cache[i].src == image.src) {

			return i;

		}

		i++;

	}

	// cache new image - create copy

	ECMS_image_cache[i] = new Image();

	ECMS_image_cache[i].src = image.src;

	ECMS_image_cache[i].alt = image.alt;

	return i;

}





// find class - caches classes

function ECMS_find_class(name) {

	var i = 0;

	while (i < ECMS_class_cache.length) {

		if (ECMS_class_cache[i] == name) {

			return i;

		}

		i++;

	}

	// cache new class name

	ECMS_class_cache[i] = name;

	return i;

}





// end menu - trigger to create menu on page

function ECMS_end_menu() {

	if (ECMS_menu_tree[ECMS_menu_tree_index]) {

		// root node exists, continue

		ECMS_PF_create_menu(ECMS_menu_tree[ECMS_menu_tree_index]);

		ECMS_menu_tree_index++;

	}

}