/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 Provides utility methods.
*/
/**
* @namespace This namespace defines utility methods for use within
* the Wave Gadgets API.
*/
wave.util = wave.util || {};
wave.util.SPACES_ = ' ';
wave.util.toSpaces_ = function(tabs) {
return wave.util.SPACES_.substring(0, tabs * 2);
};
wave.util.isArray_ = function(obj) {
try {
return obj && typeof(obj.length) == 'number';
} catch (e) {
return false;
}
};
/**
* Outputs JSON objects in text format. Optionally pretty print.
*
* @param {Object} obj The object to print.
* @param {boolean=} opt_pretty If true, pretty print (optional).
* @param {number=} opt_tabs Number of tabs to start indent.
* @return {string} The formatted object in text.
*/
wave.util.printJson = function(obj, opt_pretty, opt_tabs) {
if (!obj || typeof(obj.valueOf()) != 'object') {
if (typeof(obj) == 'string') {
return '\'' + obj + '\'';
}
else if (obj instanceof Function) {
return '[function]';
}
return '' + obj;
}
var text = [];
var isArray = wave.util.isArray_(obj);
var brace = isArray ? '[]' : '{}';
var newline = opt_pretty ? '\n' : '';
var spacer = opt_pretty ? ' ' : '';
var i = 0;
var tabs = opt_tabs || 1;
if (!opt_pretty) {
tabs = 0;
}
text.push(brace.charAt(0));
for (var key in obj) {
var value = obj[key];
if (i++ > 0) {
text.push(', ');
}
if (isArray) {
text.push(wave.util.printJson(value, opt_pretty, tabs + 1));
} else {
text.push(newline);
text.push(wave.util.toSpaces_(tabs));
text.push(key + ': ');
text.push(spacer);
text.push(wave.util.printJson(value, opt_pretty, tabs + 1));
}
}
if (!isArray) {
text.push(newline);
text.push(wave.util.toSpaces_(tabs - 1));
}
text.push(brace.charAt(1));
return text.join('');
};
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