//--
//-- Refresh mechanism
//--

//# List of notification functions to be called when certain tiddlers are changed or deleted
config.notifyTiddlers = [
	{name: "SystemSettings", notify: onSystemSettingsChange},
	{name: "StyleSheetLayout", notify: refreshStyles},
	{name: "StyleSheetColors", notify: refreshStyles},
	{name: "StyleSheet", notify: refreshStyles},
	{name: "StyleSheetPrint", notify: refreshStyles},
	{name: "PageTemplate", notify: refreshPageTemplate},
	{name: "SiteTitle", notify: refreshPageTitle},
	{name: "SiteSubtitle", notify: refreshPageTitle},
	{name: "WindowTitle", notify: refreshPageTitle},
	{name: "ColorPalette", notify: refreshColorPalette},
	{name: null, notify: refreshDisplay}
];

//# refresher functions
config.refreshers = {
	link: function(e,changeList)
		{
		var title = e.getAttribute("tiddlyLink");
		refreshTiddlyLink(e,title);
		return true;
		},

	tiddler: function(e,changeList)
		{
		var title = e.getAttribute("tiddler");
		var template = e.getAttribute("template");
		if(changeList && (changeList.indexOf && changeList.indexOf(title) != -1) && !story.isDirty(title))
			story.refreshTiddler(title,template,true);
		else
			refreshElements(e,changeList);
		return true;
		},

	content: function(e,changeList)
		{
		var title = e.getAttribute("tiddler");
		var force = e.getAttribute("force");
		var args = e.getAttribute("args");
		if(force != null || changeList == null || (changeList.indexOf && changeList.indexOf(title) != -1)) {
			jQuery(e).empty();
			config.macros.tiddler.transclude(e,title,args);
			return true;
		} else
			return false;
		},

	macro: function(e,changeList)
		{
		var macro = e.getAttribute("macroName");
		var params = e.getAttribute("params");
		if(macro)
			macro = config.macros[macro];
		if(macro && macro.refresh)
			macro.refresh(e,params);
		return true;
		}
};

config.refresherData = {
	styleSheet: "StyleSheet",
	defaultStyleSheet: "StyleSheet",
	pageTemplate: "PageTemplate",
	defaultPageTemplate: "PageTemplate",
	colorPalette: "ColorPalette",
	defaultColorPalette: "ColorPalette"
};

function refreshElements(root,changeList)
{
	var c,nodes = root.childNodes;
	for(c=0; c<nodes.length; c++) {
		var e = nodes[c], type = null;
		if(e.getAttribute && (e.tagName ? e.tagName != "IFRAME" : true))
			type = e.getAttribute("refresh");
		var refresher = config.refreshers[type];
		var refreshed = false;
		if(refresher != undefined)
			refreshed = refresher(e,changeList);
		if(e.hasChildNodes() && !refreshed)
			refreshElements(e,changeList);
	}
}

function applyHtmlMacros(root,tiddler)
{
	var e = root.firstChild;
	while(e) {
		var nextChild = e.nextSibling;
		if(e.getAttribute) {
			var macro = e.getAttribute("macro");
			if(macro) {
				e.removeAttribute("macro");
				var params = "";
				var p = macro.indexOf(" ");
				if(p != -1) {
					params = macro.substr(p+1);
					macro = macro.substr(0,p);
				}
				invokeMacro(e,macro,params,null,tiddler);
			}
		}
		if(e.hasChildNodes())
			applyHtmlMacros(e,tiddler);
		e = nextChild;
	}
}

function refreshPageTemplate(title)
{
	var stash = jQuery("<div/>").appendTo("body").hide()[0];
	var display = story.getContainer();
	var nodes,t;
	if(display) {
		nodes = display.childNodes;
		for(t=nodes.length-1; t>=0; t--)
			stash.appendChild(nodes[t]);
	}
	var wrapper = document.getElementById("contentWrapper");

	var isAvailable = function(title) {
		var s = title ? title.indexOf(config.textPrimitives.sectionSeparator) : -1;
		if(s!=-1)
			title = title.substr(0,s);
		return store.tiddlerExists(title) || store.isShadowTiddler(title);
	};
	//# protect against non-existent pageTemplate
	if(!title || !isAvailable(title))
		title = config.refresherData.pageTemplate;
	if(!isAvailable(title))
		title = config.refresherData.defaultPageTemplate; //# this one is always avaialable
	wrapper.innerHTML = store.getRecursiveTiddlerText(title,null,10);
	applyHtmlMacros(wrapper);
	refreshElements(wrapper);
	display = story.getContainer();
	jQuery(display).empty();
	if(!display)
		display = createTiddlyElement(wrapper,"div",story.containerId());
	nodes = stash.childNodes;
	for(t=nodes.length-1; t>=0; t--)
		display.appendChild(nodes[t]);
	jQuery(stash).remove();
}

function refreshDisplay(hint)
{
	if(typeof hint == "string")
		hint = [hint];
	var e = document.getElementById("contentWrapper");
	refreshElements(e,hint);
	if(backstage.isPanelVisible()) {
		e = document.getElementById("backstage");
		refreshElements(e,hint);
	}
}

function refreshPageTitle()
{
	document.title = getPageTitle();
}

function getPageTitle()
{
	return wikifyPlainText(store.getTiddlerText("WindowTitle",""),null,tiddler);
}

function refreshStyles(title,doc)
{
	setStylesheet(title == null ? "" : store.getRecursiveTiddlerText(title,"",10),title,doc || document);
}

function refreshColorPalette(title)
{
	if(!startingUp)
		refreshAll();
}

function refreshAll()
{
	refreshPageTemplate();
	refreshDisplay();
	refreshStyles("StyleSheetLayout");
	refreshStyles("StyleSheetColors");
	refreshStyles(config.refresherData.styleSheet);
	refreshStyles("StyleSheetPrint");
}