var smf_topic, smf_start, smf_show_modify, quickReplyCollapsed, buff_message;
var cur_msg_id, cur_msg_div, buff_subject, cur_subject_div, in_edit_mode = 0;

function doQuote(messageid, cur_session_id)
{
	try {
		// require quick reply
		if(quickReplyCollapsed){ throw {}; }

		// bail out older browsers
		if(!document.implementation.hasFeature('Range','2.0')){ throw {}; }

		// bail out if there is no selection
		try{ ajax_indicator(true); }catch(x){}
		var elMessage = document.evaluate(
			 "(descendant-or-self::*|following::*)[contains(concat(' ',@class,' '), ' post ')][1]"
			,document.getElementsByName('msg' + messageid)[0]
			,null,XPathResult.FIRST_ORDERED_NODE_TYPE,null
		).singleNodeValue;
		var selection = getSelectionInElement(elMessage);
		if(!(selection.rangeCount > 0)){ ajax_indicator(false); throw {}; }

		// get the post and filter to the selection
		getXMLDocument(
			 [smf_scripturl, "?action=quotefast;quote=", messageid, ";sesc=",
					cur_session_id, ";xml"].join('')
			,onDocReceived_QuoteSelected(selection)
		);

		// navigate
		location.assign('#quickreply');
	}
	catch(x) {
		return doQuote.original_QuoteSelected.apply(this, arguments);
	}
}

function insertQuoteFast (messageid) {
	try {
		// bail out older browsers
		if(!document.implementation.hasFeature('Range','2.0')){ throw {}; }

		// bail out if there is no selection
		try{ ajax_indicator(true); }catch(x){}
		var elMessage = document.evaluate(
			 "(descendant-or-self::*|following::*)[contains(concat(' ',@class,' '), ' post ')][1]"
			,document.getElementById('msg' + messageid)
			,null,XPathResult.FIRST_ORDERED_NODE_TYPE,null
		).singleNodeValue;
		var selection = getSelectionInElement(elMessage);
		if(!(selection.rangeCount > 0)){ ajax_indicator(false); throw {}; }

		// get the post and filter to the selection
		var cur_session_id = document.evaluate(
			 "//form[translate(@method,'POST','post')='post']"
					+ "/input[@type='hidden' and @name='sc']/@value"
			,document
			,null,XPathResult.STRING_TYPE,null
		).stringValue;
		getXMLDocument(
			 [smf_scripturl, "?action=quotefast;quote=", messageid, ";sesc=",
					cur_session_id, ";xml"].join('')
			,onDocReceived_QuoteSelected(selection)
		);
		return true;
	}
	catch(x) {
		var cur_session_id = '';
		for (var a=document.getElementsByName('sc'),i=0; (!cur_session_id) && (i<a.length); i++) {
			if (/^input$/i.test(a[i].tagName) && a[i].type == 'hidden'
					&& /^post$/i.test((a[i].form || {}).method)) {
				cur_session_id = a[i].value;
			}
		}
		if (window.XMLHttpRequest) {
			getXMLDocument(
				 [smf_scripturl, "?action=quotefast;quote=", messageid, ";sesc=",
						cur_session_id, ";xml"].join('')
				,onDocReceived
			);
		}
		else {
			reqWin([smf_scripturl, "?action=quotefast;quote=", messageid, ";sesc=", cur_session_id]
					.join(''), 240, 90);
		}
		return true;
	}
}

function onDocReceived_QuoteSelected (objSelection) {
	return function(XMLDoc) {
		try {
			// get the BBCode corresponding to each range in objSelection
			var strFull = XMLDoc.getElementsByTagName('quote')[0].textContent, pieces = [];
			var intPrefix = /^\[quote author=.*? link=topic=\d+.*? date=\d+\]/
					.exec(strFull)[0].length;
			var strContent = strFull.substring(intPrefix);
			for (var i = 0, match; i < objSelection.rangeCount; i++) {
				match = (new RegExp(rangeToRegExp(objSelection.getRangeAt(i)))).exec(strContent);
				pieces.push(match
					? bbcodeEnclose(strFull, intPrefix + match.index,
							intPrefix + match.index + match[0].length)
					: strFull
				);
			}

			// update arguments for the original function
			arguments[0].getElementsByTagName('quote')[0].textContent = pieces.join('\n\n');
		}catch(x){}
		return onDocReceived.apply(this, arguments);
	};
}

function bbcodeEnclose (strFull, idxStart, idxEnd) {
	var strPrefix = strFull.substring(0, idxStart);
	var strWorking = strFull.substring(idxStart, idxEnd);
	var strSuffix = strFull.substring(idxEnd);

	// remove internally-closed tags from strPrefix and strSuffix
	var reStrip = /((?:.|\n)*)\[(\w+)(?:.|\n)*?\](?:.|\n)*?\[\/\2\]/g;
	while(reStrip.test(strPrefix)){ strPrefix = strPrefix.replace(reStrip, '$1'); }
	while(reStrip.test(strSuffix)){ strSuffix = strSuffix.replace(reStrip, '$1'); }

	// remove inter-tag text from strPrefix and strSuffix
	reStrip = /(^|\])(?:[^[]|\n)+?(\[|$)/g;
	strPrefix = ([' ', strPrefix, ' '].join('')).replace(reStrip, '$1$2');
	strSuffix = ([' ', strSuffix, ' '].join('')).replace(reStrip, '$1$2');

	// return
	return [strPrefix, strWorking, strSuffix].join('');
}

function rangeToRegExp (rng) {
	return nodeToRegExp(rng.cloneContents(), true);
}

function nodeToRegExp (frg, blnFirst) {
	var precedingTags = (blnFirst ? '' : '(?:\\[.*?\\]\\s*)*');
	if (frg.nodeType == (Node.TEXT_NODE || frg.TEXT_NODE || 3)) {
		return precedingTags + regexEscape(frg.nodeValue);
	}
	if (/^br$/i.test(frg.nodeName)) {
		return precedingTags + '\\r?\\n';
	}
	if (/^img$/i.test(frg.nodeName)) {
		return precedingTags + '(?:\\[img.*?\\]' + regexEscape(frg.getAttribute('src'))
				+ '\\[img\\]|.{2,9})';
	}
	if (/(^|\s)quoteheader(\s|$)/.test(frg.className)) {
		return '';
	}
	var re = [], firstPending = blnFirst;
	for (var i = 0, append; i < frg.childNodes.length; i++) {
		append = arguments.callee(frg.childNodes[i], firstPending);
		firstPending = firstPending && !append;
		re.push(append);
	}
	return re.join('');
}

function regexEscape (str) {
	return str.replace(/([^a-z_0-9])/igm, '[$1]').replace(/\[\\\]/g, '\\\\')
			.replace(/\[([\.^])\]/g, '\\$1').replace(/\[\u00a0\]/g, '[ \\u00a0]')
			.replace(/\[[\r\n]\]/g, '\\r?\\n');
}

function getSelectionInElement (elParent) {
	var windowSelection = window.getSelection(), selection = [], rngParent = document.createRange();
		rngParent.selectNodeContents(elParent || document.body);
	var blnComparePoint = ('comparePoint' in rngParent);

	for (var i = 0, rng; i < windowSelection.rangeCount; i++) {
		rng = windowSelection.getRangeAt(i).cloneRange();
		if (blnComparePoint
			? rngParent.comparePoint(rng.startContainer, rng.startOffest) > 0
			: rngParent.compareBoundaryPoints(Range.START_TO_END, rng) <= 0
		) {	//alert("starts too late");
			continue;
		}
		if (blnComparePoint
			? rngParent.comparePoint(rng.endContainer, rng.endOffest) < 0
			: rngParent.compareBoundaryPoints(Range.END_TO_START, rng) >= 0
		) {	//alert("ends too soon");
			continue;
		}
		if (blnComparePoint
			? rngParent.comparePoint(rng.startContainer, rng.startOffest) < 0
			: rngParent.compareBoundaryPoints(Range.START_TO_START, rng) > 0
		) {	//alert("starts too soon")
			rng.setStart(rngParent.startContainer, rngParent.startOffset);
		}
		if (blnComparePoint
			? rngParent.comparePoint(rng.endContainer, rng.endOffest) > 0
			: rngParent.compareBoundaryPoints(Range.END_TO_END, rng) < 0
		) {	//alert("ends too late")
			rng.setEnd(rngParent.endContainer, rngParent.endOffset);
		}
		selection.push(rng);
	}
	selection.rangeCount = selection.length;
	selection.getRangeAt = new Function("i", "return this[i];");
	return selection;
}

doQuote.original_QuoteSelected = function(messageid, cur_session_id)
{
	if (quickReplyCollapsed)
		window.location.href = smf_scripturl + "?action=post;quote=" + messageid + ";topic=" + smf_topic + "." + smf_start + ";sesc=" + cur_session_id;
	else
	{
		if (window.XMLHttpRequest)
		{
			if (typeof window.ajax_indicator == "function")
				ajax_indicator(true);
			getXMLDocument(smf_scripturl + "?action=quotefast;quote=" + messageid + ";sesc=" + cur_session_id + ";xml", onDocReceived);
		}
		else
			reqWin(smf_scripturl + "?action=quotefast;quote=" + messageid + ";sesc=" + cur_session_id, 240, 90);

		if (navigator.appName == "Microsoft Internet Explorer")
			window.location.hash = "quickreply";
		else
			window.location.hash = "#quickreply";
	}
}

function onDocReceived(XMLDoc)
{
	var text = "";
	for (var i = 0; i < XMLDoc.getElementsByTagName("quote")[0].childNodes.length; i++)
		text += XMLDoc.getElementsByTagName("quote")[0].childNodes[i].nodeValue;

	replaceText(text, document.forms.postmodify.message);
	if (typeof window.ajax_indicator == "function")
		ajax_indicator(false);
}


function modify_msg(msg_id, cur_session_id)
{
	if (!window.XMLHttpRequest)
		return;
	if (typeof(window.opera) != "undefined")
	{
		var test = new XMLHttpRequest();
		if (typeof(test.setRequestHeader) != "function")
			return;
	}
	if (in_edit_mode == 1)
		modify_cancel();
	in_edit_mode = 1;
	if (typeof window.ajax_indicator == "function")
		ajax_indicator(true);
	getXMLDocument(smf_scripturl + '?action=quotefast;quote=' + msg_id + ';sesc=' + cur_session_id + ';modify;xml', onDocReceived_modify);
}

function onDocReceived_modify(XMLDoc)
{
	var text = "";
	var subject = "";

	// Grab the message ID.
	cur_msg_id = XMLDoc.getElementsByTagName("message")[0].getAttribute("id");

	// Replace the body part.
	for (var i = 0; i < XMLDoc.getElementsByTagName("message")[0].childNodes.length; i++)
		text += XMLDoc.getElementsByTagName("message")[0].childNodes[i].nodeValue;
	cur_msg_div = document.getElementById(cur_msg_id);
	buff_message = getInnerHTML(cur_msg_div);

	// Actually create the content, with a bodge for dissapearing dollar signs.
	text = text.replace(/\$/g,"{&dollarfix;$}");
	text = smf_template_body_edit.replace(/%body%/, text).replace(/%msg_id%/g, cur_msg_id.substr(4));
	text = text.replace(/\{&dollarfix;\$\}/g,"$");
	setInnerHTML(cur_msg_div, text);
	
	// Replace the subject part.
	cur_subject_div = document.getElementById('subject_' + cur_msg_id.substr(4));
	buff_subject = getInnerHTML(cur_subject_div);

	subject = XMLDoc.getElementsByTagName("subject")[0].childNodes[0].nodeValue;
	subject = subject.replace(/\$/g,"{&dollarfix;$}");
	subject = smf_template_subject_edit.replace(/%subject%/, subject);
	subject = subject.replace(/\{&dollarfix;\$\}/g,"$");
	setInnerHTML(cur_subject_div, subject);
	if (typeof window.ajax_indicator == "function")
		ajax_indicator(false);
}

function modify_cancel()
{
	// Roll back the HTML to its original state.
	setInnerHTML(cur_msg_div, buff_message);
	setInnerHTML(cur_subject_div, buff_subject);

	// No longer in edit mode, that's right.
	in_edit_mode = 0;

	return false;
}

function modify_save(cur_session_id)
{
	if (!in_edit_mode)
		return true;

	var i, x = new Array();
	x[x.length] = 'subject=' + escape(textToEntities(document.forms.quickModForm['subject'].value.replace(/&#/g, "&#38;#"))).replace(/\+/g, "%2B");
	x[x.length] = 'message=' + escape(textToEntities(document.forms.quickModForm['message'].value.replace(/&#/g, "&#38;#"))).replace(/\+/g, "%2B");
	x[x.length] = 'topic=' + parseInt(document.forms.quickModForm.elements['topic'].value);
	x[x.length] = 'msg=' + parseInt(document.forms.quickModForm.elements['msg'].value);

	if (typeof window.ajax_indicator == "function")
		ajax_indicator(true);

	sendXMLDocument(smf_scripturl + "?action=jsmodify;topic=" + smf_topic + ";sesc=" + cur_session_id + ";xml", x.join("&"), modify_done);

	return false;
}

function modify_done(XMLDoc)
{
	if (!XMLDoc)
	{
		modify_cancel();
		return;
	}

	var message = XMLDoc.getElementsByTagName("smf")[0].getElementsByTagName("message")[0];
	var body = message.getElementsByTagName("body")[0];
	var error = message.getElementsByTagName("error")[0];

	if (body)
	{
		// Show new body.
		var bodyText = "";
		for (i = 0; i < body.childNodes.length; i++)
			bodyText += body.childNodes[i].nodeValue;

		bodyText = bodyText.replace(/\$/g,"{&dollarfix;$}");
		bodyText = smf_template_body_normal.replace(/%body%/, bodyText);
		bodyText = bodyText.replace(/\{&dollarfix;\$\}/g,"$");
		setInnerHTML(cur_msg_div, bodyText);
		buff_message = bodyText;

		// Show new subject.
		var subject = message.getElementsByTagName("subject")[0];
		var subject_text = subject.childNodes[0].nodeValue;
		subject_text = subject_text.replace(/\$/g,"{&dollarfix;$}");
		var subject_html = smf_template_subject_normal.replace(/%msg_id%/g, cur_msg_id.substr(4)).replace(/%subject%/, subject_text);
		subject_html = subject_html.replace(/\{&dollarfix;\$\}/g,"$");
		setInnerHTML(cur_subject_div, subject_html);
		buff_subject = subject_html;
		
		// If this is the first message, also update the topic subject.
		if (subject.getAttribute("is_first") == 1)
		{
			var subject_top = smf_template_top_subject.replace(/%subject%/, subject_text);
			subject_top = subject_top.replace(/\{&dollarfix;\$\}/g,"$");
			setInnerHTML(document.getElementById("top_subject"), subject_top);
		}

		// Show this message as "modified on x by y".
		if (smf_show_modify)
		{
			var cur_modify_div = document.getElementById('modified_' + cur_msg_id.substr(4));
			setInnerHTML(cur_modify_div, message.getElementsByTagName("modified")[0].childNodes[0].nodeValue);
		}
	}
	else if (error)
	{
		setInnerHTML(document.getElementById("error_box"), error.childNodes[0].nodeValue);
		document.forms.quickModForm.message.style.border = error.getAttribute("in_body") == "1" ? "1px solid red" : "";
		document.forms.quickModForm.subject.style.border = error.getAttribute("in_subject") == "1" ? "1px solid red" : "";
	}

	if (typeof window.ajax_indicator == "function")
		ajax_indicator(false);
}

function showModifyButtons()
{
	var numImages = document.images.length;
	for (var i = 0; i < numImages; i++)
		if (document.images[i].id.substr(0, 14) == 'modify_button_')
			document.images[i].style.display = '';
}

function expandThumb(thumbID)
{
	var img = document.getElementById('thumb_' + thumbID);
	var link = document.getElementById('link_' + thumbID);
	var tmp = img.src;
	img.src = link.href;
	link.href = tmp;
	img.style.width = '';
	img.style.height = '';
	return false;
}

function swapQuickReply()
{
	document.getElementById("quickReplyExpand").src = smf_images_url + "/" + (quickReplyCollapsed ? "collapse.gif" : "expand.gif");
	document.getElementById("quickReplyOptions").style.display = quickReplyCollapsed ? "" : "none";

	quickReplyCollapsed = !quickReplyCollapsed;
}