//<![CDATA[

/*
	v2023-11-20

	PID1, FID 3906

	What does it do?

		Formchangewatchdog will add a new onclick trigger to all A elements and a a new onchange trigger to all INPUT, SELECT, TEXTAREA elements.
		onchange will check for formelement value modification and set internal variable.
		onclick will check for this variable and show up specified layer #formchangewatchdog_notYetSave
		Layer has to contain three A elements. a
			Link #1 gets a "save changes" button. document.getElementsByTagName("form")[0].submit() is called
			Link #2 gets a "Dismiss" button. Original Linktarget and/or original onclicks will be executed
			Link #3 gets a "Check" Button. #formchangewatchdog_notYetSave will be removed
	
	Requirements:
	
		mandatory: method add_onload_action()
		optional: html object with id formchangewatchdog_notYetSave and the following structure:
					<ELEMENT id="formchangewatchdog_notYetSave"><div><a /><a /><a /> [...] </div></ELEMENT>
					(#formchangewatchdog_notYetSave has to contain at least one surrounding DIV which has to contain at least three A)
					Formchangewatchdog will add its own formchangewatchdog_notYetSave using formchangewatchdog_create_formchangewatchdog_notYetSave() if document does not provide it
	
	Configurations:

		element attribute "setwatchdog":	elements having this attribute will be handled as A elements and included into watchdog processing (getting a watchdog onclock handler)
		element attribute "nowatchdog":		elements having this attribute will NOT be handled as A elements and excluded from watchdog processing	
		input attribute "watchdoginvisible":	input element is ignored by watchdog
		global variable "window.formchangewatchdog_do_not_activate":	will prevent watchdog from touching any elment. "switch off"
		global variable "window.formchangewatchdog_do_not_show_save":	will prevent watchdog from using the forst A (save). Additionaly formchangewatchdog_create_formchangewatchdog_notYetSave() will generate just 2 links
		
	Elements that are affected:
		
		- A Elements that DO NOT have - attribute "nowatchdog", - target "_blank", href with '#" as last character
		- Elements having setwatchdog
		
		- INPUT, SELECT, TEXTAREA Elements that do NOT have a attribute "watchdoginvisible"
		
		- Element with id "formchangewatchdog_notYetSave"
		
	Functions to be called:
	
		- none. all done automatically. 
		- formchangewatchdog_formcontent_has_changed() can be called to set watchdog manually to "form has changed mode"

*/

function formchangewatchdog_create_formchangewatchdog_notYetSave()
{
	var prefix = '<p>You did not save your latest changes. Do you want to...</p>';
	if(typeof window.formchangewatchdog_do_not_show_save == 'undefined')
	{
		var save = '<button onclick="" id="notYetSave_action_save">Save</button>';
	}
	else
	{
		var save = '';
	}
	var dismiss = '<button onclick="" id="notYetSave_action_dismiss">Dismiss</button>';
	var check = '<button onclick="" id="notYetSave_action_check">Check</button>';

	return '<div id="formchangewatchdog_notYetSave_container"><fieldset class="contentbox"><p>You did not save your latest changes in this form.<br /><br />Please choose one of the following options to define how to deal with these form changes:</p></fieldset><div id="formsubmit" class="form_save_area">'+save+check+dismiss+'</div></div>';	
}

function formchangewatchdog_add_listeners_to_all_clickelements()
{
	if(window.formchangewatchdog_do_not_activate)	
	{
		return true;
	}
	if(document.getElementsByTagName)
	{
		for(input=0; input < document.getElementsByTagName("input").length; input++)
		{
			if(!document.getElementsByTagName("input")[input].getAttribute || !document.getElementsByTagName("input")[input].getAttribute("watchdoginvisible"))
			{
				addEvent(document.getElementsByTagName("input")[input], "change", formchangewatchdog_formcontent_has_changed);
			}
		}
		for(input in document.getElementsByTagName("select"))
		{
			if(!document.getElementsByTagName("select")[input].getAttribute || !document.getElementsByTagName("select")[input].getAttribute("watchdoginvisible"))
			{
				addEvent(document.getElementsByTagName("select")[input], "change", formchangewatchdog_formcontent_has_changed);
			}			
		}
		for(input in document.getElementsByTagName("textarea"))
		{
			if(!document.getElementsByTagName("textarea")[input].getAttribute || !document.getElementsByTagName("textarea")[input].getAttribute("watchdoginvisible"))
			{
				addEvent(document.getElementsByTagName("textarea")[input], "change", formchangewatchdog_formcontent_has_changed);
			}
		}

		listofelements = document.getElementsByTagName("*");
		for(element in listofelements)
		{
			element=listofelements[element];
			if(element.getAttribute && element.getAttribute("onclick")!="" && element.getAttribute("onclick")!=null && element.getAttribute("onclick") != "null" && element.getAttribute("setwatchdog"))
			{
				element.setAttribute("watchdogoldonclick", element.getAttribute("onclick"));
				element.onclick=formchangewatchdog_check_for_modification_storage;
			}
		}
		listofelements = document.getElementsByTagName("a");
		for(link in listofelements)
		{
			link=listofelements[link];
			if(
				link.href
				&&(link.href.length==0 || link.href.charAt(link.href.length-1)!="#")
				&&(!link.target||link.target!="_blank")
				&&!link.getAttribute("nowatchdog")
				&&!link.getAttribute("onclick")
			)
			{
				link.setAttribute("watchdogoldonclick",link.getAttribute("onclick"));
				link.onclick=formchangewatchdog_check_for_modification_storage;
			}
		}
	}
}

window.formchangewatchdog_formChanged=false;
function formchangewatchdog_formcontent_has_changed()
{
	window.formchangewatchdog_formChanged=true;
}

function formchangewatchdog_check_for_modification_storage(e)
{
	var current_object = false;

	if(this)
	{
		current_object = this;
	}
	else if(e)
	{
		current_object = (e.target) ? e.target : e.srcElement;
	}

	if(window.formchangewatchdog_formChanged)
	{
		if(current_object)
		{
			if(_get("formClickTarget"))
			{
				_get("formClickTarget").value=current_object;
			}
			window.formchangewatchdog_storeLinktarget=current_object;
		}
		else
		{
			window.formchangewatchdog_storeLinktarget=location.href;
		}

		var arrayPageSize = getPageSize();
		var arrayPageScroll = co_getPageScroll();

		if(!_get("formchangewatchdog_notYetSave"))
		{
			var notYetSave_layer = document.createElement("div");
			notYetSave_layer.setAttribute("id","formchangewatchdog_notYetSave");
			notYetSave_layer.innerHTML=formchangewatchdog_create_formchangewatchdog_notYetSave();
			document.getElementsByTagName("body")[0].appendChild(notYetSave_layer);
		}
		else
		{
			var notYetSave_layer = _get("formchangewatchdog_notYetSave");
		}	

		notYetSave_layer.style.height = (arrayPageSize[1] + "px");
		notYetSave_layer.style.width = (arrayPageSize[0] + "px");

		if (notYetSave_layer.getElementsByTagName("div")[0])
		{
			notYetSave_layer.getElementsByTagName("div")[0].style.top = (arrayPageScroll[1] + ((arrayPageSize[3] - 35 - 120) / 2) + "px");
			notYetSave_layer.getElementsByTagName("div")[0].style.left = (((arrayPageSize[0] - 350) / 2) + "px");
		}

		notYetSave_layer.style.display="block";

		
		if(notYetSave_layer.getElementsByTagName("div")[0])
		{
			var div = notYetSave_layer.getElementsByTagName("div")[0];
	
			// store
			if(_get("notYetSave_action_save"))
			{
				_get("notYetSave_action_save").onclick=function(){ document.getElementsByTagName("form")[0].submit(); return false; }
			}
			// dismiss
			if(_get("notYetSave_action_dismiss"))
			{
				_get("notYetSave_action_dismiss").onclick=function(){ window.location.href=window.formchangewatchdog_storeLinktarget; return false; }
			}
			// check
			if(_get("notYetSave_action_check"))
			{
				_get("notYetSave_action_check").onclick=function() { notYetSave_layer.style.display="none"; return false; }
			}
		}

		return false;
	}
	else
	{
		// ff stores onclick as string. let's generate an executable function and run it withinin current_object context to preserve .this references
		if(typeof current_object.getAttribute("watchdogoldonclick") == "string" && current_object.getAttribute("watchdogoldonclick") != "" && current_object.getAttribute("watchdogoldonclick") != "null")
		{
			eval("var current_object.checkonclick=function(){"+current_object.getAttribute("watchdogoldonclick")+";}");

			return current_object.checkonclick();
		}
		// ie stores onclick as function. let's add and run it withinin current_object context to preserve .this references
		else if(typeof current_object.getAttribute("watchdogoldonclick") == "function")
		{
			current_object.checkonclick=current_object.getAttribute("watchdogoldonclick");

			return current_object.checkonclick();
		}

		if(current_object.tagName.toUpperCase()==="A")
		{
			return true;
		}
		else
		{
			window.location.href=current_object.href;
			return false;
		}
	}
}


if(typeof add_onload_action == 'function')
{
	add_onload_action("formchangewatchdog_add_listeners_to_all_clickelements()");
}
//]]>