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