script.js

$(document).ready(function(){
//======================================================================== general

function hover_a() {
	$(this).addClass('current');
	$(this).find('i').addClass('current');
}
function hover_b() {
	$(this).removeClass('current');
	$(this).find('i').removeClass('current');
}
$('.button').hover(hover_a, hover_b);
$('.hover').hover(hover_a, hover_b);

var $_GET = {};
document.location.search.replace(/\??(?:([^=]+)=([^&]*)&?)/g, function () {
	function decode(s) {
		return decodeURIComponent(s.split("+").join(" "));
	}
	$_GET[decode(arguments[1])] = decode(arguments[2]);
});

function isINT(input){
	return parseInt(input)==input;
}

//======================================================================== index.php
if (typeof $IS_INDEX_PHP != 'undefined')
{
	var $current_topic = -1;
	
	function scroll($i) {
		$("html:not(:animated),body:not(:animated)").animate({scrollTop : $i}, 0);
	}
	function goHash() {
		var words = window.location.hash.split('/');
		var $to_topic = words[1];
		var $to_reply = (words[2])?words[2]:1;
		if (isINT($to_topic) && isINT($to_reply))
		{
			var $this_topic = $("#topic_title").attr('name');
			var $this_reply = $("#text_container").find(".tcore:eq(0)").text();
			if (!$this_reply) $this_reply = 1;
			if (($to_topic != $this_topic) || ($to_reply != $this_reply)) 
			{
				goTopic($to_topic, $to_reply);
				return true;
			}
		}
		return false;
	}

	var $shall_go_end_of_mid = false;

	function updateCurrTopic(tttt)
	{
		if (tttt == $current_topic) return;
		$(".topic[name=" + $current_topic + "] p").removeClass('current');
		$current_topic = tttt;
		$(".topic[name=" + tttt + "] p").addClass('current');
	}
	function goTopic(tttt, $rep) {
		$('#prepare_post_button').contents().filter(function(){return this.nodeType == 3}).replaceWith(' 新帖');
		var $topic_change = false;
		if ($current_topic != tttt)
		{
			$topic_change = true;
			updateCurrTopic(tttt);
		}
		var $begin = 0;
		if ($rep) { $begin = $rep; }
		$.post('post_db.php', {method:"get", topic:tttt, begin:$begin}, function(msg)
		{
			if ($topic_change)
			{
				$('#text_container').empty();
				if (!$shall_go_end_of_mid)
				{
					scroll(0);
				}
				clearPost();
				$('#post_title').hide();
				$('#text_container').show();
			}
			updateText(msg);
			
			if ($shall_go_end_of_mid)
			{
				$shall_go_end_of_mid = false;
				to_end_of_mid();
			}
		});
	}

	function refresh($to_topic) {
		$.post('post_db.php', {method:"get"}, function(msg)
		{
			updateNav(msg);
			if ($to_topic > 0)
			{
				scroll(0);
				goTopic($to_topic);
			}
			else if (typeof $to_topic == 'undefined')
			{
				scroll(0);
				if ($(".topic:eq(0)").attr('name') > 0)
					goTopic($(".topic:eq(0)").attr('name'), 0);
				else
					goTopic(0, 0);
			}
		});
	}	
	
	$(window).resize(function() {
	}).trigger("resize");
	
	function to_end_of_mid() {
		scroll($('#mid_container').height() - $(window).height() + 40);
	}

	function updateText(msg, $partial) {
		if (msg) {
			$('#text_container').html(msg);
			
			$('#mid').show();
			document.title = $('#topic_title').text();
			updateCurrTopic($('#topic_title').attr('name'));
			
			var $numposts = $('#topic_title').attr('topic_replies');
			var $target = $(".topic[name=" + $current_topic + "]").find('.trep');
			$target.text($numposts);
			if ($numposts > 0) $target.show(); else $target.hide();

			makeHash();
			if (typeof MathJax != 'undefined') if (typeof MathJax.isReady != 'undefined') if (MathJax.isReady)
				MathJax.Hub.Queue(["Typeset", MathJax.Hub, document.getElementById("text_container")]);
		}
		$("#text_container .tup").mousedown(function(){replyShift(-1); return false});
		$("#text_container .tup").hover(hover_a, hover_b);
		$("#text_container .tdown").mousedown(function(){replyShift(+1); return false});
		$("#text_container .tdown").hover(hover_a, hover_b);
	}
	function updateNav(msg) {
		$('#left').show();
		if (!msg) return;
		$('#nav').html(msg);
		if (typeof MathJax != 'undefined') if (typeof MathJax.isReady != 'undefined') if (MathJax.isReady)
			MathJax.Hub.Queue(["Typeset", MathJax.Hub, document.getElementById("nav")]);
		$(".topic[name=" + $current_topic + "] p").addClass('current');
		$("#nav .tup").mousedown(function(){topicShift(-1); return false});
		$("#nav .tup").hover(hover_a, hover_b);
		$("#nav .tdown").mousedown(function(){topicShift(+1); return false});
		$("#nav .tdown").hover(hover_a, hover_b);
		$("#nav .topic p").mousedown(function(e){
			e.preventDefault();
			goTopic($(this).parent().attr('name'));
		});
	}
	function clearPost() {
		$('#post_text').val('');
		$('#post_title').val('');
		$('#post_msg').empty();
	}
	
	function makeHash() {
		var $this_topic = $("#topic_title").attr('name');
		var $this_reply = $("#text_container").find(".tcore:eq(0)").text();
		if ((!$this_reply) || ($this_reply == 1))
		{
			window.location.hash = "topic/" + $this_topic;
		} else {
			window.location.hash = "topic/" + $this_topic + "/" + $this_reply;
		}
	}
	
	if (goHash()) refresh(-1); else	refresh();
	window.addEventListener("hashchange", goHash, false);
	
	$('#post_container').keydown(function (e) {
		if (e.ctrlKey && e.keyCode == 13) {
			$('#post_button').mousedown().mouseup();
		}
	});
	
	$('#refresh_button').mousedown(function(e)
	{
		e.preventDefault();
		refresh();
	});

	function replyShift($dir) {
		var $begin = 0;
		if ($dir == -1)
		{
			$begin = parseInt($('#topic_title').attr('begin')) - parseInt($('#topic_title').attr('limit'));
		} 
		else
		{
			$begin = parseInt($('#topic_title').attr('end')) + 1;
		}
		$.post('post_db.php', {method:"get", topic:$current_topic, begin:$begin}, function(msg)
		{
			scroll(0);
			updateText(msg);
		});				
	}
	
	function topicShift($dir) {
		var $begin = 0;
		if ($dir == -1)
		{
			$begin = parseInt($('#left_title').attr('begin')) - parseInt($('#left_title').attr('limit'));
		} 
		else
		{
			$begin = parseInt($('#left_title').attr('end')) + 1;
		}
		$.post('post_db.php', {method:"get", begin:$begin}, function(msg)
		{
			if (msg)
			{
				scroll(0);
				updateNav(msg);
			}
		});				
	}
	
	$('#page_bottom_button').mousedown(function(e)
	{
		e.preventDefault();
		to_end_of_mid();
	});
	$('#page_top_button').mousedown(function(e)
	{
		e.preventDefault();
		scroll(0);
	});
	
	var $current_topic_bak = -1;
	$('#prepare_post_button').mousedown(function(e)
	{
		e.preventDefault();
		clearPost();
		if ($current_topic >= 0)
		{
			$('#prepare_post_button').contents().filter(function(){return this.nodeType == 3}).replaceWith(' 取消');
			$current_topic_bak = $current_topic;
			$(".topic[name=" + $current_topic + "] p").removeClass('current');
			$current_topic = -1;
			$('#text_container').hide();
			$('#post_title').show();
		}
		else 
		{
			$('#prepare_post_button').contents().filter(function(){return this.nodeType == 3}).replaceWith(' 新帖');
			$current_topic = $current_topic_bak;
			$(".topic[name=" + $current_topic + "] p").addClass('current');
			$('#post_title').hide();
			$('#text_container').show();
		}
	});
	
	var post_working = false;
	$('#post_button').mousedown(function(e)
	{
		e.preventDefault();
		if (post_working) return false;
		post_working = true;
		$('#post_msg').html('正在发送。');
		$.post('post_db.php', {title:$('#post_title').val(), text:$('#post_text').val(), method:"new", topic:$current_topic}, function(msg)
		{
			if(msg.substr(0, 7) == 'SUCCESS')
			{
				clearPost();
				$('#post_msg').html('发送成功。');
				if ($current_topic < 0)
				{
					refresh(msg.substr(7));
				}
				else
				{
					$shall_go_end_of_mid = true;
					goTopic($current_topic);
				}
			}
			else
			{
				$('#post_msg').html(msg);
			}
			post_working = false;
		});
	});
	
	(function () {
		var head = document.getElementsByTagName("head")[0], script;
		script = document.createElement("script");
		script.type = "text/x-mathjax-config";
		script[(window.opera ? "innerHTML" : "text")] =
		'MathJax.Hub.Config({\n' +
	    'jax: ["input/TeX","output/SVG"],\n' +
		'extensions: ["tex2jax.js","MathMenu.js","MathZoom.js"],\n' +
		'TeX: { extensions: ["AMSmath.js","AMSsymbols.js","noErrors.js","noUndefined.js"] },\n' +
		'tex2jax: { inlineMath: [["$","$"]] }\n' +
		'});';
		head.appendChild(script);
		script = document.createElement("script");
		script.type = "text/javascript";
		script.src = "http://cdn.mathjax.org/mathjax/latest/MathJax.js";
		head.appendChild(script);
	})();
}
//======================================================================== account.php
if (typeof $IS_ACCOUNT_PHP != 'undefined')
{
	$(document).keypress(function(e) {
		if(e.keyCode == 13) {
			$('#login_button').mousedown().mouseup();
		}
	});
	var working = false;
	$('#login_button').mousedown(function(e)
	{
		e.preventDefault();
		if (working) return false;
		working = true;
		$('#message').empty();
		if ($_GET['a'] == 'login')
		{
			$.post('account_db.php', {method:'login', user:$('#login_user').val(), pass:$('#login_pass').val()}, function(msg)
			{
				if (msg == "登陆成功。")
				{
					window.location.href = "index.php";
				}
				$('#message').html(msg);
				working = false;
			});
		}
		else if ($_GET['a'] == 'register')
		{
			$.post('account_db.php', {method:'register', user:$('#login_user').val(), pass:$('#login_pass').val()}, function(msg)
			{
				if (msg == "登陆成功。")
				{
					window.location.href = "index.php";
				}
				$('#message').html(msg);
				working = false;
			});
		}
	});
}
});