/*

Clippings version 1.0.6.18.2001

summary 
- - - - -
script handles all Clipping functionality
this is a stripped down version of the IHT Clippings code
the primary difference is the removal of animation code which I am not that happy with
and a few minor improvements

+  Add to Clippings
+  Link to Clipping
+  Update Clipping as read
+  Remove Clipping(s)
+  Save Clippings

comments
- - - - - - 
Clippings only work with DOM browsers.  Opera at this point does not have enough of the DOM to support clippings.
There is little or no feature/browser compatibiliy checking in this code, so use wisely.
The code has been tested on IE 5.0, 5.5, 6.0 on Windows, IE 5.0 on Mac, and various versions of Netscape 6.0 and Mozilla.

loadClippingURL() will control how Clipping urls are handled.  You will want to customize this method.
clippingsTag is a variable which defines what tag your Clippings icon will be nested in.  All clipping icons must be in the same type of tag.

there is a fix for a display error in Mozilla on lines 266-268 and again on 

changelog
- - - - - - 
08.06.2001 Mindor tweak to clippingsSetContainerHeight()
07.04.2002 Aggiunta l'istruzione saveClippings(); nella funzione loadClippingURL (Francesco Caccavella, f.caccavella@html.it), pił varie modifiche.


copyright
- - - - - -
Copyright (C) 2001 John Weir  (www.smokinggun.com)

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

A copy of the license may be found at www.smokinggun.com/perm/gnu.php
or www.fsf.org (Free Software Foundation)
*/


allClippings = new Array();  
activeClippings = new Array();
currentClipping = 0; 
clippingsDivArray = new Array(); 
cookiesOn = false; 

clippingsTag = "A"; 

var mouseX = mouseY =0;

function screenObject()
	{

	this.bottom = function(){
		if (document.body.scrollHeight) return document.body.scrollHeight};
	
	this.height = function() {
		if (document.body.offsetHeight) return document.body.offsetHeight;}
	
	this.visHeight = function() {
		if (window.innerHeight) return window.innerHeight;
		if (document.body.clientHeight) return document.body.clientHeight;}
	
	this.width = function() {
		if (document.body.offsetWidth) return document.body.offsetWidth;}
	
	this.scrollTop = function() {
		if(document.body.scrollTop) return document.body.scrollTop
		if (window.pageYOffset) return window.pageYOffset;
		else return 0;};
	}

function mousePosition(e)
	{
	if (e) event = e;   
	mouseX = event.clientX;
	mouseY = event.clientY;
	}
	
	
function windowResize()
	{
	clippingsSetContainerHeight()
	}

function initClippings()
	{
	createPageClippingsArray()
	loadClippings();
	setClippingsVisibility();		
	updateClippingCounter();
	drawClippings();
	}	






function loadClippings()
	{
	clippingsString = null;
	tempArray = document.cookie.split(";");
	x = -1;
		
		for (tA = 0; tA < tempArray.length; tA++)
			{
			if (tempArray[tA].indexOf('clippings=') > -1) 
				{
				tPos = tempArray[tA].indexOf("=")+2;
				clippingsString = tempArray[tA].substring(tPos,tempArray[tA].length); 				}
			
			}
	if (clippingsString != null)
		{		
		tempArray = clippingsString.split("^");
		if (tempArray.length > 1)
		{
		x=0;
		for (i=0; i < tempArray.length/4; i++)
			{
			
			activeClippings[i] = new Clipping(tempArray[x],tempArray[x+1],tempArray[x+2],tempArray[x+3])
			x=x+4;
			}}
		}
	}

function saveClippings()
	{
	tempCookie = "clippings=";
	for(i=0; i < activeClippings.length; i++)
		{
		tempCookie=tempCookie+"^"+(activeClippings[i].id)+"^"+(activeClippings[i].name)+"^"+(activeClippings[i].URL)+"^"+(activeClippings[i].read);
		}
		var expire = new Date ();
   		expire.setTime (expire.getTime() + (6 * 24 * 3600000)); 
   		expire = expire.toGMTString();
	finalCookie = tempCookie+"; path=/; expires="+expire;  	
  	document.cookie = finalCookie;
	}


function eventCheckForCookies()
	{
	document.cookie = "cookies=on";
  	
  	checkForCookie = document.cookie.split(";");
  	
  		for (x=0; x < checkForCookie.length; x++)
  			{
  			if (checkForCookie[x].indexOf("cookies") >= 0) {cookiesOn = true;}
  			}
  		if (cookiesOn == false) alert("Per utilizzare questa funzione\ndevi abilitare i Cookies");
	}

function Clipping(id,name,URL,read)
	{
	this.id = id;
	this.name = name;
	this.URL = URL;
	this.read = read;
	this.clicked = markRead;
	} 
	
function markRead(id)
	{
	if (!id) id = this.id.substring(5,this.id.length);
	for (i=0; i < activeClippings.length; i++)
		{
		if (activeClippings[i].id == id) activeClippings[i].read = "yes";
		}
		
	
	drawClippings();
	}	

// Mark read quando vedo il contenuto dal link del div content

function markReadFromContent(id)
	{
	
	for (i=0; i < activeClippings.length; i++)
		{
		if (activeClippings[i].id == id) markRead(activeClippings[i].id);
		}
	//refresh the container
	drawClippings();
	}		

function loadClippingURL(pos)
	{
	n = window.open(activeClippings[pos].URL,'_self',+activeClippings[pos].id);
	markRead(activeClippings[pos].id);
	saveClippings();
	}
//load next unread clipping in array
function eventShowNextClipping()
	{
	if (activeClippings != null) 
		{
		total = 0;
		for (aC = 0; aC < activeClippings.length; aC++)
			{
			if (activeClippings[aC].read != "yes") 
				{
				markRead(activeClippings[aC].id);
				saveClippings();
				loadClippingURL(aC);
				//document.location = activeClippings[aC].url;
				break;
				}
			}
		}
	}
function eventClearReadClippings()
	{
	tempClippings = new Array()
	x = 0;
	for (i=0; i < activeClippings.length; i++)
		{
		if (activeClippings[i].read != "yes") {tempClippings[x] = activeClippings[i]; x++}
		}
	activeClippings = tempClippings;
	drawClippings();
	setClippingsVisibility();	
	saveClippings();
	}

function eventClearAllClippings()
	{
	
	activeClippings = new Array();
	setClippingsVisibility();
	drawClippings();	
	saveClippings();
	}

function drawClippings()
	{
	newHTML = "";
	
	if (activeClippings.length < 1) 
		{
		newHTML = "<p>Non hai salvato nessuna struttura. <br>Per salvare una struttura basta cliccare su <img src=\"img/clipping.gif\" width=\"20\" height=\"14\" /> accanto al suo nome</p>";
		newHTML += "<ul>";
		}
	if (activeClippings.length > 0) 
		{
		newHTML = "<ul>";
		}
	for (i=0; i < activeClippings.length; i++)
		{
		clipping = activeClippings[i];
		
		if (clipping.read == "yes") tClass = "intestazione";
		else tClass = "menu";
		
		newHTML += "<li><a href=\"#\"  onclick=\"javascript:loadClippingURL("+i+");\" class='"+tClass+"' id='cLink"+clipping.id+"'>";
		newHTML += clipping.name+"</a></li>";
		
		}
		
	obj = document.getElementById("clippingsContainer");
	
	obj.innerHTML = newHTML;
	
	obj.style.display = "none";
	obj.style.display = "block";
	
	clippingsSetContainerHeight();
	}


function clippingsSetContainerHeight()
	{
	obj = document.getElementById("clippingsContainer");
	if (userScreen.visHeight() > 2000)
		{
		obj.style.height= (userScreen.visHeight()-350)+"px";
		}
	}


function checkForDuplicates()
	{
	for (i=0; i < activeClippings.length; i++)
		{
		if (newClipping == activeClippings[i].id) {i = allClippings.length; duplicate = true;}
		}
	}


function createPageClippingsArray()
	{
		d = document.getElementsByTagName(clippingsTag)
		for (j=0; j < d.length; j++) if (d[j].id.indexOf("clp") > -1) 
			{
			clippingsDivArray[clippingsDivArray.length] = d[j];
			}
	 }

function clippingInstanceVisibility(id,state)
	{
	t = document.getElementsByName(id);
	if(t.length > 0)
		{
		for (j=0; j < t.length; j++) 
			{
			t[j].style.visibility = state;
			t[j].onclick = addClipping;
			}
		}
	else {
	 	d = clippingsDivArray;
  		{
		for (j=0; j < d.length; j++) if (d[j].id == id) 
			{
			d[j].style.visibility = state;
			d[j].onclick = addClipping;
			}
		}
		}		
	}
	
function setClippingsVisibility()
	{
	
	for (i=0; i < allClippings.length; i++)
		{
		vis = "visible";
		
		for (x=0; x <activeClippings.length; x++) if (allClippings[i].id == activeClippings[x].id) vis = "hidden";
			obj = "clp"+allClippings[i].id;
			clippingInstanceVisibility(obj,vis)
			}
			
		}

function addClipping()
	{
	newClipping = this.id.substring(3,this.id.length)
	duplicate = false;
	for (i=0; i < allClippings.length; i++) 
		{
		if (newClipping == allClippings[i].id) {pos = i; i = allClippings.length}
		}
		
	if (activeClippings.length > 0)	checkForDuplicates() 
	
	if (!duplicate)
	{	
		eventCheckForCookies();
		if (cookiesOn == true)
			{
			activeClippings[activeClippings.length] = new Clipping(allClippings[pos].id,allClippings[pos].name,allClippings[pos].URL);
			
			clippingInstanceVisibility(this.id,'hidden') 
	 		
	 		drawClippings();	
	 		if (document.all) event.cancleBubble = true;
	 		saveClippings();
		 	}
	 	}
	}

//sets the number of unread clippings
function updateClippingCounter()
	{
	if (activeClippings != null) 
		{
		total = 0;
		for (aC = 0; aC < activeClippings.length; aC++)
			{
			if (activeClippings[aC].read != "yes") total++
			}
		}
	obj = document.getElementById("clippingsCounter");
	// Tolto da obj.innerHTML questa linea "Ricordati di me non letti: "+total+"<br> tanto si vedono i non letti
	obj.innerHTML = "";
	obj.style.display = "none";
	obj.style.display = "block";
	}
	
	function init()
		{		
		if (document.all) classFix = "className";
		else classFix = "class";
		
		userScreen = new screenObject(); 
		
		window.onresize = windowResize;
		
		initClippings();
		}
	window.onload = init;