vichan/js/post-hover.js

/*
 * post-hover.js
 * https://github.com/savetheinternet/Tinyboard/blob/master/js/post-hover.js
 *
 * Released under the MIT license
 * Copyright (c) 2012 Michael Save <savetheinternet@tinyboard.org>
 *
 * Usage:
 *   $config['additional_javascript'][] = 'js/jquery.min.js';
 *   $config['additional_javascript'][] = 'js/post-hover.js';
 *
 */

onready(function(){
	var dont_fetch_again = [];
	init_hover = function() {
		var $link = $(this);
		
		var id;
		
		if(id = $link.text().match(/^>>(\d+)$/)) {
			id = id[1];
		} else {
			return;
		}
		
		var $post = false;
		var hovering = false;
		var hovered_at;
		$link.hover(function(e) {
			hovering = true;
			hovered_at = {'x': e.pageX, 'y': e.pageY};
			
			var start_hover = function($link) {
				if($post.is(':visible') &&
						$post.offset().top + $post.height() >= $(window).scrollTop() &&
						$post.offset().top <= $(window).scrollTop() + $(window).height()
						) {
					// post is in view
					$post.attr('style', 'border-style: none dashed dashed none; background: ' + $post.css('border-right-color'));
				} else {
					var $newPost = $post.clone();
					$newPost.find('span.mentioned').remove();
					$newPost
						.attr('id', 'post-hover-' + id)
						.addClass('post-hover')
						.css('position', 'absolute')
						.css('border-style', 'solid')
						.css('box-shadow', '1px 1px 1px #999')
						.css('display', 'block')
						.insertAfter($link.parent());
					$link.trigger('mousemove');
				}
			};
			
			$post = $('div.post#reply_' + id);
			if($post.length > 0) {
				start_hover($(this));
			} else {
				var url = $link.attr('href').replace(/#.*$/, '');
				
				if($.inArray(url, dont_fetch_again) != -1) {
					return;
				}
				dont_fetch_again.push(url);
				
				$.ajax({
					url: url,
					context: document.body,
					success: function(data) {
						$(data).find('div.post.reply').each(function() {
							if($('#' + $(this).attr('id')).length == 0)
								$('div.post:first').prepend($(this).css('display', 'none').addClass('hidden'));

						});
						
						$post = $('div.post#reply_' + id);
						if(hovering && $post.length > 0) {
							start_hover($link);
						}
					}
				});
			}
		}, function() {
			hovering = false;
			if(!$post)
				return;
			
			$post.attr('style', '');
			if($post.hasClass('hidden'))
				$post.css('display', 'none');
			$('.post-hover').remove();
		}).mousemove(function(e) {
			if(!$post)
				return;
			
			var $hover = $('#post-hover-' + id);
			if($hover.length == 0)
				return;
			
			var top = (e.pageY ? e.pageY : hovered_at['y']) - 10;
			
			if(e.pageY < $(window).scrollTop() + 15) {
				top = $(window).scrollTop();
			} else if(e.pageY > $(window).scrollTop() + $(window).height() - $hover.height() - 15) {
				top = $(window).scrollTop() + $(window).height() - $hover.height() - 15;
			}
			
			
			$hover.css('left', (e.pageX ? e.pageX : hovered_at['x'])).css('top', top);
		});
	};
	
	$('div.body a:not([rel="nofollow"])').each(init_hover);
	
	// allow to work with auto-reload.js, etc.
	$(document).bind('new_post', function(e, post) {
		$(post).find('div.body a:not([rel="nofollow"])').each(init_hover);
	});
});