Installed leaflet in extlib

[mediagoblin.git] / extlib / leaflet / src / core / Util.js

/*\r
 * L.Util is a namespace for various utility functions.\r
 */\r
\r
L.Util = {\r
	extend: function(/*Object*/ dest) /*-> Object*/ {	// merge src properties into dest\r
		var sources = Array.prototype.slice.call(arguments, 1);\r
		for (var j = 0, len = sources.length, src; j < len; j++) {\r
			src = sources[j] || {};\r
			for (var i in src) {\r
				if (src.hasOwnProperty(i)) {\r
					dest[i] = src[i];\r
				}\r
			}\r
		}\r
		return dest;\r
	},\r
\r
	bind: function(/*Function*/ fn, /*Object*/ obj) /*-> Object*/ {\r
		return function() {\r
			return fn.apply(obj, arguments);\r
		};\r
	},\r
\r
	stamp: (function() {\r
		var lastId = 0, key = '_leaflet_id';\r
		return function(/*Object*/ obj) {\r
			obj[key] = obj[key] || ++lastId;\r
			return obj[key];\r
		};\r
	})(),\r
	\r
	requestAnimFrame: (function() {\r
		function timeoutDefer(callback) {\r
			window.setTimeout(callback, 1000 / 60);\r
		}\r
		\r
		var requestFn = window.requestAnimationFrame || \r
			window.webkitRequestAnimationFrame || \r
			window.mozRequestAnimationFrame || \r
			window.oRequestAnimationFrame || \r
			window.msRequestAnimationFrame || \r
			timeoutDefer;\r
		\r
		return function(callback, context, immediate) {\r
			callback = context ? L.Util.bind(callback, context) : context;\r
			if (immediate && requestFn === timeoutDefer) {\r
				callback();\r
			} else {\r
				requestFn(callback);\r
			}\r
		};\r
	})(),\r
\r
	limitExecByInterval: function(fn, time, context) {	\r
		var lock, execOnUnlock, args;\r
		function exec(){\r
			lock = false;\r
			if (execOnUnlock) {\r
				args.callee.apply(context, args);\r
				execOnUnlock = false;\r
			}\r
		}\r
		return function() {\r
			args = arguments;\r
			if (!lock) {				\r
				lock = true;\r
				setTimeout(exec, time);\r
				fn.apply(context, args);\r
			} else {\r
				execOnUnlock = true;\r
			}\r
		};\r
	},\r
	\r
	falseFn: function() { return false; },\r
	\r
	formatNum: function(num, digits) {\r
		var pow = Math.pow(10, digits || 5);\r
		return Math.round(num * pow) / pow;\r
	},\r
	\r
	setOptions: function(obj, options) {\r
		obj.options = L.Util.extend({}, obj.options, options);\r
	},\r
	\r
	getParamString: function(obj) {\r
		var params = [];\r
		for (var i in obj) {\r
			if (obj.hasOwnProperty(i)) {\r
				params.push(i + '=' + obj[i]);\r
			}\r
		}\r
		return '?' + params.join('&');\r
	}\r
};\r