Chip 2006 July/CHIP 2006-07.2.iso/program/google/google-toolbar-win.xpi/amulet-jslib/google3/lang.js

JavaScript | 2006-05-15 | 4.3 KB | 199 lines

function isDef(val) {
return typeof val != "undefined";
}
function isNull(val) {
return val === null;
}
function isArray(val) {
return isObject(val) && val.constructor == Array;
}
function isString(val) {
return typeof val == "string";
}
function isBoolean(val) {
return typeof val == "boolean";
}
function isNumber(val) {
return typeof val == "number";
}
function isFunction(val) {
return typeof val == "function";
}
function isObject(val) {
return val && typeof val == "object";
}
function getObjectProps(obj) {
var ret = [];
for (var p in obj) {
ret.push(p);
}
return ret;
}
function isEmptyObject(val) {
if (!isObject(val)) {
return false;
}
for (var p in val) {
return false;
}
return true;
}
var getHashCode;
var removeHashCode;
(function () {
var hashCodeProperty = "lang_hashCode_";
getHashCode = function(obj) {
if (!obj[hashCodeProperty]) {
obj[hashCodeProperty] = ++getHashCode.hashCodeCounter_;
}
return obj[hashCodeProperty];
};
removeHashCode = function(obj) {
obj[hashCodeProperty] = undefined;
};
getHashCode.hashCodeCounter_ = 0;
})();
String.prototype.startsWith = function(prefix) {
if (this.length < prefix.length) {
return false;
}
if (this.substring(0, prefix.length) == prefix) {
return true;
}
return false;
}
String.prototype.trim = function() {
return this.replace(/^\s+|\s+$/g, "");
}
String.prototype.subs = function() {
var ret = this;
for (var i = 0; i < arguments.length; i++) {
ret = ret.replace(/\%s/, String(arguments[i]));
}
return ret;
}
if (!Function.prototype.apply) {
Function.prototype.apply = function(oScope, args) {
var sarg = [];
var rtrn, call;
if (!oScope) oScope = window;
if (!args) args = [];
for (var i = 0; i < args.length; i++) {
sarg[i] = "args[" + i + "]";
}
call = "oScope.__applyTemp__.peek().(" + sarg.join(",") + ");";
if (!oScope.__applyTemp__) {
oScope.__applyTemp__ = [];
}
oScope.__applyTemp__.push(this);
rtrn = eval(call);
oScope.__applyTemp__.pop();
return rtrn;
}
}
if (!Array.prototype.push) {
Array.prototype.push = function() {
for (var i = 0; i < arguments.length; i++) {
this[this.length] = arguments[i];
}
return this.length;
}
}
if (!Array.prototype.pop) {
Array.prototype.pop = function() {
if (!this.length) {
return;
}
var val = this[this.length - 1];
this.length--;
return val;
}
}
Array.prototype.peek = function() {
return this[this.length - 1];
}
if (!Array.prototype.shift) {
Array.prototype.shift = function() {
if (this.length == 0) {
return; // return undefined
}
var val = this[0];
for (var i = 0; i < this.length - 1; i++) {
this[i] = this[i+1];
}
this.length--;
return val;
}
}
if (!Array.prototype.unshift) {
Array.prototype.unshift = function() {
var numArgs = arguments.length;
for (var i = this.length - 1; i >= 0; i--) {
this[i + numArgs] = this[i];
}
for (var j = 0; j < numArgs; j++) {
this[j] = arguments[j];
}
return this.length;
}
}
if (!Array.prototype.forEach) {
Array.prototype.forEach = function(callback, scope) {
for (var i = 0; i < this.length; i++) {
callback.apply(scope, [this[i]]);
}
}
}
function bind(fn, self, opt_args) {
var boundargs = fn.boundArgs_ || [];
boundargs = boundargs.concat(Array.prototype.slice.call(arguments, 2));
if (typeof fn.boundSelf_ != "undefined") {
self = fn.boundSelf_;
}
if (typeof fn.foundFn_ != "undefined") {
fn = fn.boundFn_;
}
var newfn = function() {
var args = boundargs.concat(Array.prototype.slice.call(arguments));
return fn.apply(self, args);
}
newfn.boundArgs_ = boundargs;
newfn.boundSelf_ = self;
newfn.boundFn_ = fn;
return newfn;
}
Function.prototype.bind = function(self, opt_args) {
return bind.apply(
null, [this, self].concat(Array.prototype.slice.call(arguments, 1)));
}
function partial(fn, opt_args) {
return bind.apply(
null, [fn, null].concat(Array.prototype.slice.call(arguments, 1)));
}
Function.prototype.partial = function(opt_args) {
return bind.apply(
null, [this, null].concat(Array.prototype.slice.call(arguments)));
}
function bindMethods(obj) {
for (var p in obj) {
if (isFunction(obj[p])) {
obj[p] = obj[p].bind(obj);
}
}
}
Function.prototype.inherits = function(parentCtor) {
var tempCtor = function(){};
tempCtor.prototype = parentCtor.prototype;
this.superClass_ = parentCtor.prototype;
this.prototype = new tempCtor();
}
Function.prototype.mixin = function(props) {
for (var x in props) {
this.prototype[x] = props[x];
}
if (isFunction(props['toString']) &&
props['toString'] != this.prototype['toString']) {
this.prototype.toString = props.toString
}
}