/**
* phpBB3 forum functions
*/

/**
* Window popup
*/
function popup(url, width, height, name)
{
	if (!name)
	{
		name = '_popup';
	}

	window.open(url.replace(/&/g, '&'), name, 'height=' + height + ',resizable=yes,scrollbars=yes, width=' + width);
	return false;
}

/**
* Jump to page
*/
function jumpto()
{
	var page = prompt(jump_page, on_page);

	if (page !== null && !isNaN(page) && page == Math.floor(page) && page > 0)
	{
		if (base_url.indexOf('?') == -1)
		{
			document.location.href = base_url + '?start=' + ((page - 1) * per_page);
		}
		else
		{
			document.location.href = base_url.replace(/&/g, '&') + '&start=' + ((page - 1) * per_page);
		}
	}
}

/**
* Mark/unmark checklist
* id = ID of parent container, name = name prefix, state = state [true/false]
*/
function marklist(id, name, state)
{
	var parent = document.getElementById(id);
	if (!parent)
	{
		eval('parent = document.' + id);
	}

	if (!parent)
	{
		return;
	}

	var rb = parent.getElementsByTagName('input');
	
	for (var r = 0; r < rb.length; r++)
	{	
		if (rb[r].name.substr(0, name.length) == name)
		{
			rb[r].checked = state;
		}
	}
}

/**
* Resize viewable area for attached image or topic review panel (possibly others to come)
* e = element
*/
function viewableArea(e, itself)
{
	if (!e) return;
	if (!itself)
	{
		e = e.parentNode;
	}
	
	if (!e.vaHeight)
	{
		// Store viewable area height before changing style to auto
		e.vaHeight = e.offsetHeight;
		e.vaMaxHeight = e.style.maxHeight;
		e.style.height = 'auto';
		e.style.maxHeight = 'none';
		e.style.overflow = 'visible';
	}
	else
	{
		// Restore viewable area height to the default
		e.style.height = e.vaHeight + 'px';
		e.style.overflow = 'auto';
		e.style.maxHeight = e.vaMaxHeight;
		e.vaHeight = false;
	}
}

/**
* Set display of page element
* s[-1,0,1] = hide,toggle display,show
* type = string: inline, block, inline-block or other CSS "display" type
*/
function dE(n, s, type)
{
	if (!type)
	{
		type = 'block';
	}

	var e = document.getElementById(n);
	if (!s)
	{
		s = (e.style.display == '' || e.style.display == type) ? -1 : 1;
	}
	e.style.display = (s == 1) ? type : 'none';
}

/**
* Alternate display of subPanels
*/
function subPanels(p)
{
	var i, e, t;

	if (typeof(p) == 'string')
	{
		show_panel = p;
	}

	for (i = 0; i < panels.length; i++)
	{
		e = document.getElementById(panels[i]);
		t = document.getElementById(panels[i] + '-tab');

		if (e)
		{
			if (panels[i] == show_panel)
			{
				e.style.display = 'block';
				if (t)
				{
					t.className = 'activetab';
				}
			}
			else
			{
				e.style.display = 'none';
				if (t)
				{
					t.className = '';
				}
			}
		}
	}
}

/**
* Call print preview
*/
function printPage()
{
	if (is_ie)
	{
		printPreview();
	}
	else
	{
		window.print();
	}
}

/**
* Show/hide groups of blocks
* c = CSS style name
* e = checkbox element
* t = toggle dispay state (used to show 'grip-show' image in the profile block when hiding the profiles) 
*/
function displayBlocks(c, e, t)
{
	var s = (e.checked == true) ?  1 : -1;

	if (t)
	{
		s *= -1;
	}

	var divs = document.getElementsByTagName("DIV");

	for (var d = 0; d < divs.length; d++)
	{
		if (divs[d].className.indexOf(c) == 0)
		{
			divs[d].style.display = (s == 1) ? 'none' : 'block';
		}
	}
}

function selectCode(a)
{
	// Get ID of code block
	var e = a.parentNode.parentNode.getElementsByTagName('CODE')[0];

	// Not IE
	if (window.getSelection)
	{
		var s = window.getSelection();
		// Safari
		if (s.setBaseAndExtent)
		{
			s.setBaseAndExtent(e, 0, e, e.innerText.length - 1);
		}
		// Firefox and Opera
		else
		{
			// workaround for bug # 42885
			if (window.opera && e.innerHTML.substring(e.innerHTML.length - 4) == '<BR>')
			{
				e.innerHTML = e.innerHTML + '&nbsp;';
			}

			var r = document.createRange();
			r.selectNodeContents(e);
			s.removeAllRanges();
			s.addRange(r);
		}
	}
	// Some older browsers
	else if (document.getSelection)
	{
		var s = document.getSelection();
		var r = document.createRange();
		r.selectNodeContents(e);
		s.removeAllRanges();
		s.addRange(r);
	}
	// IE
	else if (document.selection)
	{
		var r = document.body.createTextRange();
		r.moveToElementText(e);
		r.select();
	}
}

/**
* Play quicktime file by determining it's width/height
* from the displayed rectangle area
*/
function play_qt_file(obj)
{
	var rectangle = obj.GetRectangle();

	if (rectangle)
	{
		rectangle = rectangle.split(',');
		var x1 = parseInt(rectangle[0]);
		var x2 = parseInt(rectangle[2]);
		var y1 = parseInt(rectangle[1]);
		var y2 = parseInt(rectangle[3]);

		var width = (x1 < 0) ? (x1 * -1) + x2 : x2 - x1;
		var height = (y1 < 0) ? (y1 * -1) + y2 : y2 - y1;
	}
	else
	{
		var width = 200;
		var height = 0;
	}

	obj.width = width;
	obj.height = height + 16;

	obj.SetControllerVisible(true);
	obj.Play();
}

/**
* Check if the nodeName of elem is name
* @author jQuery
*/
function is_node_name(elem, name)
{
	return elem.nodeName && elem.nodeName.toUpperCase() == name.toUpperCase();
}

/**
* Check if elem is in array, return position
* @author jQuery
*/
function is_in_array(elem, array)
{
	for (var i = 0, length = array.length; i < length; i++)
		// === is correct (IE)
		if (array[i] === elem)
			return i;

	return -1;
}

/**
* Find Element, type and class in tree
* Not used, but may come in handy for those not using JQuery
* @author jQuery.find, Meik Sievertsen
*/
function find_in_tree(node, tag, type, class_name)
{
	var result, element, i = 0, length = node.childNodes.length;

	for (element = node.childNodes[0]; i < length; element = node.childNodes[++i])
	{
		if (!element || element.nodeType != 1) continue;

		if ((!tag || is_node_name(element, tag)) && (!type || element.type == type) && (!class_name || is_in_array(class_name, (element.className || element).toString().split(/\s+/)) > -1))
		{
			return element;
		}

		if (element.childNodes.length)
			result = find_in_tree(element, tag, type, class_name);

		if (result) return result;
	}
}

var in_autocomplete = false;
var last_key_entered = '';

/**
* Check event key
*/
function phpbb_check_key(event)
{
	// Keycode is array down or up?
	if (event.keyCode && (event.keyCode == 40 || event.keyCode == 38))
		in_autocomplete = true;

	// Make sure we are not within an "autocompletion" field
	if (in_autocomplete)
	{
		// If return pressed and key changed we reset the autocompletion
		if (!last_key_entered || last_key_entered == event.which)
		{
			in_autocompletion = false;
			return true;
		}
	}

	// Keycode is not return, then return. ;)
	if (event.which != 13)
	{
		last_key_entered = event.which;
		return true;
	}

	return false;
}

/**
* Usually used for onkeypress event, to submit a form on enter
*/
function submit_default_button(event, selector, class_name)
{
	// Add which for key events
	if (!event.which && ((event.charCode || event.charCode === 0) ? event.charCode : event.keyCode))
		event.which = event.charCode || event.keyCode;

	if (phpbb_check_key(event))
		return true;

	var current = selector['parentNode'];

	// Search parent form element
	while (current && (!current.nodeName || current.nodeType != 1 || !is_node_name(current, 'form')) && current != document)
		current = current['parentNode'];

	// Find the input submit button with the class name
	//current = find_in_tree(current, 'input', 'submit', class_name);
	var input_tags = current.getElementsByTagName('input');
	current = false;

	for (var i = 0, element = input_tags[0]; i < input_tags.length; element = input_tags[++i])
	{
		if (element.type == 'submit' && is_in_array(class_name, (element.className || element).toString().split(/\s+/)) > -1)
			current = element;
	}

	if (!current)
		return true;

	// Submit form
	current.focus();
	current.click();
	return false;
}

/**
* Apply onkeypress event for forcing default submit button on ENTER key press
* The jQuery snippet used is based on http://greatwebguy.com/programming/dom/default-html-button-submit-on-enter-with-jquery/
* The non-jQuery code is a mimick of the jQuery code ;)
*/
function apply_onkeypress_event()
{
	// jQuery code in case jQuery is used
	if (jquery_present)
	{
		jQuery('form input[type=text], form input[type=password]').live('keypress', function (e)
		{
			var default_button = jQuery(this).parents('form').find('input[type=submit].default-submit-action');
			
			if (!default_button || default_button.length <= 0)
				return true;

			if (phpbb_check_key(e))
				return true;

			if ((e.which && e.which == 13) || (e.keyCode && e.keyCode == 13))
			{
				default_button.click();
				return false;
			}

			return true;
		});
	
		return;
	}

	var input_tags = document.getElementsByTagName('input');

	for (var i = 0, element = input_tags[0]; i < input_tags.length ; element = input_tags[++i])
	{
		if (element.type == 'text' || element.type == 'password')
		{
			// onkeydown is possible too
			element.onkeypress = function (evt) { submit_default_button((evt || window.event), this, 'default-submit-action'); };
		}
	}
}

/**
* Detect JQuery existance. We currently do not deliver it, but some styles do, so why not benefit from it. ;)
*/
var jquery_present = typeof jQuery == 'function';

/**
* Function required by function identify_plugins()
* Used only in IE
* Normal it's a part of file fetch_whorls.js
*/
function ieAcrobatVersion()
{
	// estimate the version of Acrobat on IE using horrible horrible hacks
	if (window.ActiveXObject)
	{
		for (var x = 2; x < 10; x++)
		{
			try
			{
				oAcro = eval("new ActiveXObject('PDF.PdfCtrl."+x+"');");
        
				if (oAcro)
				{
					return "Adobe Acrobat version" + x + ".?";
				}
			} catch(ex) {}
    }
    
    try
    {
		oAcro4 = new ActiveXObject('PDF.PdfCtrl.1');
      
		if (oAcro4)
		{	
			return "Adobe Acrobat version 4.?";
		}
    } catch(ex) {}
    
    try
    {
		oAcro7=new ActiveXObject('AcroPDF.PDF.1');
		
		if (oAcro7)
		{	
			return "Adobe Acrobat version 7.?";
		}
    } catch (ex) {}
    
    return "";
  }
}

/**
* Function required for browser fingerprinting.
* Returns list of installed plugins in a browser.
* Normal it's a part of file fetch_whorls.js
*/
function identify_plugins()
{
	// fetch and serialize plugins
	var plugins = '';
  
	// in Mozilla and in fact most non-IE browsers, this is easy
	if (navigator.plugins)
	{
		var np = navigator.plugins;
		var plist = new Array();
    
		// sorting navigator.plugins is a right royal pain
		// but it seems to be necessary because their order
		// is non-constant in some browsers
		for (var i = 0; i < np.length; i++)
		{
			plist[i] = np[i].name + "; ";
			plist[i] += np[i].description + "; ";
			plist[i] += np[i].filename + ";";
			
			for (var n = 0; n < np[i].length; n++)
			{
				plist[i] += " (" + np[i][n].description +"; "+ np[i][n].type + "; "+ np[i][n].suffixes + ")";
			}
			plist[i] += ". ";
		}
		
		plist.sort(); 
    
		for (i = 0; i < np.length; i++)
		{
			plugins += plist[i];
		}
	}
		
	// in IE, things are much harder; we use PluginDetect to get less
	// information (only the plugins listed below & their version numbers)
	if (plugins == "")
	{
		var pp = new Array();
		pp[0] = "Java"; pp[1] = "QuickTime"; pp[2] = "DevalVR"; pp[3] = "Shockwave";
		pp[4] = "Flash"; pp[5] = "WindowsMediaplayer"; pp[6] = "Silverlight"; 
		pp[7] = "VLC";
		
		var version;
		
		for (p in pp)
		{
			version = PluginDetect.getVersion(pp[p]);
			
			if (version)
			{
				plugins += pp[p] + " " + version + "; ";
			}
		}
		
		plugins += ieAcrobatVersion();
	}
	
	return plugins;
}

/**
* Returns user timezone settings
*/
function get_timezone_offset()
{
     var current_date = new Date();
     var gmt_offset = current_date.getTimezoneOffset() / 60;
     
     return gmt_offset;
}

/**
* Returns installed fonts list
*/
function populateFontList(fontArr)
{
	var fonts_list = '';
	
	for (var key in fontArr)
	{
		fonts_list += fontArr[key].replace(/^\s\s*/, '').replace(/\s\s*$/, '') + ', ';
	}
	
	// Because return can't be used if we don't pass the function argument
	$('input[name="system_fonts"]').attr('value', fonts_list)
}

/**
* Tests local storage engine
*/
function test_supercookie()
{
	var supported = '';
	
	try
	{ 
    	localStorage.fingerprint = 'Yes';
    	sessionStorage.fingerprint = 'Yes';
	}
	catch (ex) {}
  
	try
	{
    	if (localStorage.fingerprint == 'Yes')
    	{
    		supported += 'DOM localStorage: Yes';
		}
		else
		{
			supported += 'DOM localStorage: No';
		}
	}
	catch (ex) { supported += 'DOM localStorage: No'; }

	try
	{
    	if (sessionStorage.fingerprint == 'Yes')
    	{
			supported += ', DOM sessionStorage: Yes';
		}
		else
		{
			supported += ', DOM sessionStorage: No';
		}
	}
	catch (ex) { supported += ', DOM sessionStorage: No'; }
	
	try
	{
		oPersistDiv.setAttribute('remember', 'remember this value');
		oPersistDiv.save('oXMLStore');
		oPersistDiv.setAttribute('remember', 'overwritten!');
		oPersistDiv.load('oXMLStore');
		
		if ('remember this value' == (oPersistDiv.getAttribute('remember')))
		{
			supported += ', IE userData: Yes';
		}
		else
		{ 
			supported += ', IE userData: No';
    	}
	} catch (ex) { supported += ', IE userData: No'; }
	
	return supported;
}