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-rw-r--r--infrastructure/framework-src/modules/jsutils.js195
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-/**
- * Copyright 2009 Google Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS-IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/**
- * @fileOverview A collection of core JavaScript utilities.
- */
-
-/**
- * Iterator convenience for JavaScript Objects.
- *
- * Note that if func returns false, the iteration will be immediately terminated.
- * (Returning undefined, or not specifying a return type, does not terminate the iteration).
- *
- * @example
-var pastels = {
- red: "#fcc",
- green: "#cfc",
- blue: "#ccf"
-};
-eachProperty(pastels, function(key, value) {
- print(DIV({style: 'background: '+value+';'}, key));
-});
- *
- * @param {object} obj The object over which to iterate.
- * @param {function} func The function to run on each [key,value] pair.
- */
-function eachProperty(obj, func) {
- var r;
- for (k in obj) {
- if (!obj.hasOwnProperty || obj.hasOwnProperty(k)) {
- r = func(k,obj[k]);
- if (r === false) {
- break;
- }
- }
- }
-}
-
-/**
- * Douglas Crockford's "object" function for prototypal inheritance, taken from
- * http://javascript.crockford.com/prototypal.html
- *
- * @param {object} parent The parent object.
- * @return {object} A new object whose prototype is parent.
- */
-function object(parent) {
- function f() {};
- f.prototype = parent;
- return new f();
-}
-
-/**
- * Creates an array of the properties of <code>obj</code>,
- * <em>not</em> including built-in or inherited properties. If no
- * argument is given, applies to the global object.
- *
- * @example
-// Prints "abc"
-keys({a: 1, b: 2, c: 3}).forEach(function(k) {
- print(k);
-}
- *
- * @example
-// Prints all the functions and object members of the global "appjet" object,
-// one per line.
-print(keys(appjet).join('\n'));
- *
- * @param {object} obj
- */
-function keys(obj) {
- var array = [];
- var o = obj;
- if (o == undefined) {
- o = this;
- }
- for(var k in o) {
- if (!obj.hasOwnProperty || o.hasOwnProperty(k)) {
- array.push(k);
- }
- }
- return array;
-}
-
-/**
- * Comparator that returns -1, +1, or 0 depending on whether a &lt; b, or a &gt; b, or
- * neither, respectively.
- * @param {object} a
- * @param {object} b
- * @return {number} -1, 0, or +1
- */
-function cmp(a,b) {
- if (a < b) {
- return -1;
- }
- if (a > b) {
- return 1;
- }
- return 0;
-}
-
-function arrayToSet(arr) {
- var set = {};
- arr.forEach(function(x) {
- set[x] = true;
- });
- return set;
-}
-
-function mergeArrays(mergeFunction, a1, a2, etc) {
- var len = a1.length;
- var arrays = Array.prototype.slice.call(arguments, 1);
- for (var i = 0; i < arrays.length; ++i) {
- if (arrays[i].length != len) {
- return;
- }
- }
- out = [];
- for (var i = 0; i < a1.length; ++i) {
- out.push(mergeFunction.apply(this, arrays.map(function(array) { return array[i]; })));
- }
- return out;
-}
-
-function debug(obj) {
- if (typeof(obj) == 'object') {
- var ret = [];
- if (obj) {
- eachProperty(obj, function(k, v) {
- ret.push(k+" -> "+debug(v));
- });
- return '['+ret.join(", ")+']';
- } else {
- return String(obj);
- }
- } else {
- return String(obj);
- }
-}
-
-/**
- * Create a scala function out of the given JS function.
- */
-function scalaFn(nargs, f) {
- if (typeof(f) == 'function') {
- return new Packages.scala['Function'+nargs]({
- apply: f
- });
- } else {
- return new Packages.scala['Function'+nargs]({
- apply: function() { return f; }
- })
- }
-}
-
-function scalaF0(f) {
- return scalaFn(0, f);
-}
-
-function scalaF1(f) {
- return scalaFn(1, f);
-}
-
-/**
- * Some bonus functions for functional programming.
- */
-function f_curry(thisPtr, f, arg1, arg2, etc) {
- var curriedArgs = Array.prototype.slice.call(arguments, 2);
- return function() {
- var args = Array.prototype.slice.call(arguments, 0);
- return f.apply(thisPtr, curriedArgs.concat(args));
- }
-}
-
-function f_limitArgs(thisPtr, f, n) {
- return function() {
- var args = Array.prototype.slice.call(arguments, 0, n);
- return f.apply(thisPtr, args);
- }
-}
-
-
-