// ****************************************************************
// ********************* FOLDER TREE SCRIPT ***********************
// ****************************************************************

function Folder(folderDescription, hreference) {
	//constructor
	//constant data
	this.desc = folderDescription
	this.hreference = hreference
	this.id = -1
	this.navObj = 0
	this.iconImg = 0
	this.nodeImg = 0
	this.isLastNode = 0
	  
	//dynamic data
	this.isOpen = true
	this.iconSrc = "menus/images/ftv2folderopen.gif"
	this.children = new Array
	this.nChildren = 0

	//methods
	this.initialize = initializeFolder
	this.setState = setStateFolder
	this.addChild = addChild
	this.createIndex = createEntryIndex
	this.hide = hideFolder
	this.display = display
	this.renderOb = drawFolder
	this.totalHeight = totalHeight
	this.subEntries = folderSubEntries
	this.outputLink = outputFolderLink
}

function setStateFolder(isOpen) {
	var subEntries
	var totalHeight
	var fIt = 0
	var i=0
	if (isOpen == this.isOpen)
		return
	if (browserVersion == 2) {
		totalHeight = 0
		for (i=0; i < this.nChildren; i++)
			totalHeight = totalHeight + this.children[i].navObj.clip.height
		subEntries = this.subEntries()
		if (this.isOpen)
			totalHeight = 0 - totalHeight
		for (fIt = this.id + subEntries + 1; fIt < nEntries; fIt++)
		    indexOfEntries[fIt].navObj.moveBy(0, totalHeight)
	}
	this.isOpen = isOpen
	propagateChangesInState(this)
}

function propagateChangesInState(folder) {
	var i=0
	if (folder.isOpen) {
		if (folder.nodeImg)
			if (folder.isLastNode)
				folder.nodeImg.src = "menus/images/ftv2mlastnode.gif"
			else
				folder.nodeImg.src = "menus/images/ftv2mnode.gif"
			folder.iconImg.src = "menus/images/ftv2folderopen.gif"
			for (i=0; i<folder.nChildren; i++)
				folder.children[i].display()
	} else {
		if (folder.nodeImg)
			if (folder.isLastNode)
				folder.nodeImg.src = "menus/images/ftv2plastnode.gif"
			else
				folder.nodeImg.src = "menus/images/ftv2pnode.gif"
			folder.iconImg.src = "menus/images/ftv2folderclosed.gif"
			for (i=0; i<folder.nChildren; i++)
				folder.children[i].hide()
	}
}

function hideFolder() {
	if (browserVersion == 1) {
		if (this.navObj.style.display == "none")
			return
		this.navObj.style.display = "none"
	} else {
		if (this.navObj.visibility == "hiden")
			return
		this.navObj.visibility = "hiden"
	}
	this.setState(0)
}

function initializeFolder(level, lastNode, leftSide) {
	var j=0
	var i=0
	var numberOfFolders
	var numberOfDocs
	var nc
	nc = this.nChildren
	this.createIndex()
	var auxEv = ""
	if (browserVersion > 0)
		auxEv = "<a href='javascript:clickOnNode("+this.id+")'>"
	else
		auxEv = "<a>"
	if (level>0)
		if (lastNode) {
			//the last 'brother' in the children array
			this.renderOb(leftSide + auxEv + "<img name='nodeIcon" + this.id + "' src='menus/images/ftv2mlastnode.gif' width=16 height=22 border=0></a>")
			leftSide = leftSide + "<img src='menus/images/ftv2blank.gif' width=16 height=22>"
			this.isLastNode = 1
		} else {
			this.renderOb(leftSide + auxEv + "<img name='nodeIcon" + this.id + "' src='menus/images/ftv2mnode.gif' width=16 height=22 border=0></a>")
			leftSide = leftSide + "<img src='menus/images/ftv2vertline.gif' width=16 height=22>"
			this.isLastNode = 0
		}
	else
		this.renderOb("")
		if (nc > 0) {
			level = level + 1
			for (i=0 ; i < this.nChildren; i++) {
				if (i == this.nChildren-1)
					this.children[i].initialize(level, 1, leftSide)
				else
					this.children[i].initialize(level, 0, leftSide)
			}
		}
}

function drawFolder(leftSide) {
	if (browserVersion == 2) {
		if (!doc.yPos)
			doc.yPos = 8
		doc.write("<layer id='folder" + this.id + "' top=" + doc.yPos + " visibility=hiden>")
	}
	doc.write("<table ")
	if (browserVersion == 1)
		doc.write(" id='folder" + this.id + "' style='position:block;' ")
		doc.write(" border=0 cellspacing=0 cellpadding=0>")
		doc.write("<tr><td>")
		doc.write(leftSide)
		this.outputLink()
		doc.write("<img name='folderIcon" + this.id + "' ")
		doc.write("src='" + this.iconSrc+"' border=0></a>")
		doc.write("</td><td valign=middle nowrap>")
		if (USETEXTLINKS) {
			this.outputLink()
			doc.write(this.desc + "</a>")
		}
	else
		doc.write(this.desc)
		doc.write("</td>")
		doc.write("</table>")
	if (browserVersion == 2) {
		doc.write("</layer>")
	}
	if (browserVersion == 1) {
		this.navObj = doc.all["folder"+this.id]
		this.iconImg = doc.all["folderIcon"+this.id]
		this.nodeImg = doc.all["nodeIcon"+this.id]
	} else if (browserVersion == 2) {
		this.navObj = doc.layers["folder"+this.id]
		this.iconImg = this.navObj.document.images["folderIcon"+this.id]
		this.nodeImg = this.navObj.document.images["nodeIcon"+this.id]
		doc.yPos=doc.yPos+this.navObj.clip.height
	}
}
// ************************ ICI ***************
function outputFolderLink() {
	if (this.hreference) {
		doc.write("<a href='" + this.hreference + "' TARGET=\"main\" ")
		if (browserVersion > 0)
			doc.write("onClick='javascript:clickOnNode("+this.id+")'")
	doc.write(">")
	}
	else
	
		doc.write("<a href='javascript:clickOnNode("+this.id+")'>")
}

function addChild(childNode) {
	this.children[this.nChildren] = childNode
	this.nChildren++
	return childNode
}

function folderSubEntries() {
	var i = 0
	var se = this.nChildren
	for (i=0; i < this.nChildren; i++) {
		if (this.children[i].children) //is a folder
			se = se + this.children[i].subEntries()
	}
	return se
}

// ************************************************************* 
// Definition of class Item (a document or link inside a Folder)
// *************************************************************

function Item(itemDescription, itemLink) {
	// Constructor
	// constant data
	this.desc = itemDescription
	this.link = itemLink
	this.id = -1 //initialized in initalize()
	this.navObj = 0 //initialized in render()
	this.iconImg = 0 //initialized in render()
	this.iconSrc = "menus/images/ftv2doc.gif"
	// methods
	this.initialize = initializeItem
	this.createIndex = createEntryIndex
	this.hide = hideItem
	this.display = display
	this.renderOb = drawItem
	this.totalHeight = totalHeight
}

function hideItem() {
	if (browserVersion == 1) {
		if (this.navObj.style.display == "none")
			return
		this.navObj.style.display = "none"
	} else {
		if (this.navObj.visibility == "hiden")
			return
		this.navObj.visibility = "hiden"
	}
}

function initializeItem(level, lastNode, leftSide) {
	this.createIndex()
	if (level>0)
		if (lastNode) {
			//the last 'brother' in the children array
			this.renderOb(leftSide + "<img src='menus/images/ftv2lastnode.gif' width=16 height=22>")
			leftSide = leftSide + "<img src='menus/images/ftv2blank.gif' width=16 height=22>"
		} else {
			this.renderOb(leftSide + "<img src='menus/images/ftv2node.gif' width=16 height=22>")
			leftSide = leftSide + "<img src='menus/images/ftv2vertline.gif' width=16 height=22>"
		}
	else
		this.renderOb("")
}

function drawItem(leftSide) {
	if (browserVersion == 2)
		doc.write("<layer id='item" + this.id + "' top=" + doc.yPos + " visibility=hiden>")
	doc.write("<table")
	if (browserVersion == 1)
		doc.write(" id='item" + this.id + "' style='position:block;' ")
	doc.write(" border=0 cellspacing=0 cellpadding=0>")
	doc.write("<tr><td>")
	doc.write(leftSide)
	doc.write("<a href=" + this.link + ">")
	doc.write("<img id='itemIcon"+this.id+"' ")
	doc.write("src='"+this.iconSrc+"' border=0>")
	doc.write("</a>")
	doc.write("</td><td valign=middle nowrap>")
	if (USETEXTLINKS)
		doc.write("<a href=" + this.link + ">" + this.desc + "</a>")
	else
		doc.write(this.desc)
	doc.write("</table>")
	if (browserVersion == 2)
		doc.write("</layer>")
	if (browserVersion == 1) {
		this.navObj = doc.all["item"+this.id]
		this.iconImg = doc.all["itemIcon"+this.id]
	} else if (browserVersion == 2) {
		this.navObj = doc.layers["item"+this.id]
		this.iconImg = this.navObj.document.images["itemIcon"+this.id]
		doc.yPos=doc.yPos+this.navObj.clip.height
	}
}

// Methods common to both objects (pseudo-inheritance)
// ********************************************************

function display() {
	if (browserVersion == 1)
		this.navObj.style.display = "block"
	else
		this.navObj.visibility = "show"
}

function createEntryIndex() {
	this.id = nEntries
	indexOfEntries[nEntries] = this
	nEntries++
}

// total height of subEntries open
function totalHeight() {
	//used with browserVersion == 2
	var h = this.navObj.clip.height
	var i = 0
	if (this.isOpen) //is a folder and _is_ open
		for (i=0 ; i < this.nChildren; i++)
		h = h + this.children[i].totalHeight()
	return h
}

// ************************ 
// ****** Events **********
// ************************

function clickOnFolder(folderId) {
	var clicked = indexOfEntries[folderId]
	if (!clicked.isOpen)
		clickOnNode(folderId)
	return
	if (clicked.isSelected)
		return
}

function clickOnNode(folderId) {
	var clickedFolder = 0
	var state = 0
	clickedFolder = indexOfEntries[folderId]
	state = clickedFolder.isOpen
	clickedFolder.setState(!state) //open<->close
}

function initializeDocument() {
	if (doc.all)
		browserVersion = 1 //IE4
	else
		if (doc.layers)
			browserVersion = 2 //NS4
		else
			browserVersion = 0 //other
	foldersTree.initialize(0, 1, "")
	foldersTree.display()
	if (browserVersion > 0) {
		doc.write("<layer top="+indexOfEntries[nEntries-1].navObj.top+">&nbsp;</layer>")
		// close the whole tree
		clickOnNode(0)
		// open the root folder
		clickOnNode(0)
	}
}

// **************************************************************
// Auxiliary Functions for Folder-Treee backward compatibility **
// **************************************************************

function gFld(description, hreference) {
	folder = new Folder(description, hreference)
	return folder
}

function gLnk(target, description, linkData) {
	fullLink = ""
	if (target==0) {
		fullLink = "'"+linkData+"' target=\"main\""
	} else {
		if (target==1)
			fullLink = "'http://"+linkData+"' target=_blank"
		else
			fullLink = "'http://"+linkData+"' target=\"main\""
	}
	linkItem = new Item(description, fullLink)
	return linkItem
}

function insFld(parentFolder, childFolder) {
	return parentFolder.addChild(childFolder)
}

function insDoc(parentFolder, document) {
	parentFolder.addChild(document)
}

// *******************
// Global variables **
// *******************

USETEXTLINKS = 1
indexOfEntries = new Array
nEntries = 0
doc = document
browserVersion = 0
selectedFolder = 1