MediaWiki:Common.js/minetip.js

// Taken from https://minecraft.gamepedia.com/MediaWiki:Common.js
// Creates minecraft style tooltips
// Replaces normal tooltips. Supports minecraft [[formatting codes]] (except k), and a description with line breaks (/).
$(function() {
'use strict';
(window.updateTooltips = function() {
	var escapeChars = { '\\&': '&#38;', '<': '&#60;', '>': '&#62;' };
	var escape = function(text) {
		// "\" must be escaped first
		return text.replace(/\\\\/g, '&#92;')
			.replace(/\\&|[<>]/g, function(char) { return escapeChars[char]; });
	};
	var $tooltip = $();
	var $win = $(window), winWidth, winHeight, width, height;
	
	$(document.body).on({
		'mouseenter.minetip': function(e) {
			$tooltip.remove();
			
			var $elem = $(this), title = $elem.attr('data-minetip-title');
			if (title === undefined) {
				title = $elem.attr('title');
				if (title !== undefined) {
					title = $.trim(title.replace(/&/g, '\\&'));
					$elem.attr('data-minetip-title', title);
				}
			}
			
			// No title or title only contains formatting codes
			if (title === undefined || title !== '' && title.replace(/&([0-9a-fl-or])/g, '') === '') {
				// Find deepest child title
				var childElem = $elem[0], childTitle;
				do {
					if (childElem.hasAttribute('title')) {
						childTitle = childElem.title;
					}
					childElem = childElem.firstChild;
				} while(childElem && childElem.nodeType === 1);
				if (childTitle === undefined) {
					return;
				}
				
				// Append child title as title may contain formatting codes
				if (!title) {
					title = '';
				}
				title += $.trim(childTitle.replace(/&/g, '\\&'));
				
				// Set the retrieved title as data for future use
				$elem.attr('data-minetip-title', title);
			}
			
			if (!$elem.data('minetip-ready')) {
				// Remove title attributes so the native tooltip doesn't get in the way
				$elem.find('[title]').addBack().removeAttr('title');
				$elem.data('minetip-ready', true);
			}
			
			if (title === '') {
				return;
			}
			
			var content = '<span class="minetip-title format-7">&7' + escape(title) + '&r</span>';
			
			var description = $.trim($elem.attr('data-minetip-text'));
			if (description) {
				// Apply normal escaping plus "/"
				description = escape(description).replace(/\\\//g, '&#47;');
				content += '<span class="minetip-description format-7">&7' + description.replace(/\//g, '<br>') + '&r</span>';
			}
			
			// Add classes for minecraft formatting codes
			while (content.search(/&[0-9a-fl-o]/) > -1) {
				content = content.replace(/&([0-9a-fl-o])(.*?)(&r|$)/g, '<span class="format-$1">$2</span>&r');
			}
			// Remove reset formatting
			content = content.replace(/&r/g, '');
			
			$tooltip = $('<div id="minetip-tooltip">');
			$tooltip.html(content).appendTo('body');
			
			// Cache current window and tooltip size
			winWidth = $win.width();
			winHeight = $win.height();
			width = $tooltip.outerWidth(true);
			height = $tooltip.outerHeight(true);
			
			// Trigger a mouse movement to position the tooltip
			$elem.trigger('mousemove', e);
		},
		'mousemove.minetip': function(e, trigger) {
			if (!$tooltip.length) {
				$(this).trigger('mouseenter');
				return;
			}
			
			// Get event data from remote trigger
			e = trigger || e;
			
			// Get mouse position and add default offsets
			var top = e.clientY - 34;
			var left = e.clientX + 14;
			
			// If going off the right of the screen, go to the left of the cursor
			if (left + width > winWidth) {
				left -= width + 36;
			}
			
			// If now going off to the left of the screen, resort to going above the cursor
			if (left < 0) {
				left = 0;
				top -= height - 22;
				
				// Go below the cursor if too high
				if (top < 0) {
					top += height + 47;
				}
			// Don't go off the top of the screen
			} else if (top < 0) {
				top = 0;
			// Don't go off the bottom of the screen
			} else if (top + height > winHeight) {
				top = winHeight - height;
			}
			
			// Apply the positions
			$tooltip.css({ top: top, left: left });
		},
		'mouseleave.minetip': function() {
			if (!$tooltip.length) {
				return;
			}
			
			$tooltip.remove();
			$tooltip = $();
		}
	}, '.minetip, .invslot-item');
}());
});