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/* <copyright>
This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
(c) Copyright 2011 Motorola Mobility, Inc. All Rights Reserved.
</copyright> */
/**
Provides common conversion, validation, and formatting functions for different types of values.
@module montage/core/converter/converter
@requires montage/core/core
*/
var Montage = require("montage").Montage;
var FUNCTION_CLASS = '[object Function]',
BOOLEAN_CLASS = '[object Boolean]',
NUMBER_CLASS = '[object Number]',
STRING_CLASS = '[object String]',
ARRAY_CLASS = '[object Array]',
DATE_CLASS = '[object Date]';
var _toString = Object.prototype.toString;
// TODO should maybe move these into String.isString and Number.isNumber to parallel Array.isArray
/**
@exports module:montage/core/converter#isString
@function
*/
var isString = function(object) {
return _toString.call(object) === STRING_CLASS;
};
exports.isString = isString;
/**
@exports module:montage/core/converter#isNumber
@function
*/
var isNumber = function(object) {
return _toString.call(object) === NUMBER_CLASS;
};
exports.isNumber = isNumber;
/**
@exports module:montage/core/converter#isDef
@function
*/
var isDef = function(obj) {
return (obj && typeof obj !== 'undefined');
};
exports.isDef = isDef;
var startsWith = exports.startsWith = function(str) {
return str.lastIndexOf(prefix, 0) === 0;
};
var endsWith = exports.endsWith = function(str) {
var l = str.length - suffix.length;
return l >= 0 && str.indexOf(suffix, l) == l;
};
/**
Truncates a string to a certain length and adds '...' if necessary.<br>
The length also accounts for the ellipsis, so a maximum length of 10 and a string<br>
'Hello World!' produces 'Hello W...'.
@function
@param {String} str The string to truncate.
@param {Number} chars Max number of characters.
@param {Boolean} opt_protectEscapedCharacters Whether to protect escaped characters from being cut off in the middle.
@return {String} The truncated {@code str} string.
*/
var truncate = exports.truncate = function(str, chars, opt_protectEscapedCharacters) {
if (opt_protectEscapedCharacters) {
goog.string.unescapeEntities(this);
}
if (str.length > chars) {
return str.substring(0, chars - 3) + '…';
}
if (opt_protectEscapedCharacters) {
str.htmlEscape(this);
}
return this;
};
// Validators
/**
Base validator object.
@class module:montage/core/converter.Validator
@extends module:montage/core/core.Montage
*/
var Validator = exports.Validator = Montage.create(Montage, /** @lends module:montage/core/converter.Validator# */{
/**
@type {Object}
@default null
*/
validate: {
value: null
}
});
// Converters
/**
@class module:montage/core/converter.Converter
@classdesc The base Converter class that is extended by specific converter classes. A Converter has two primary methods:
<ul>
<li><code>convert(<i>value</i>)</code> : Convert value to a String.
<li><code>revert(<i>value</i>)</code>: Do the reverse. Depending on the specific converter being used, the reverse operation may be "lossy".
</ul>
*/
var Converter = exports.Converter = Montage.create(Montage, /** @lends module:montage/core/converter.Converter# */ {
/**
Specifies whether the converter allows partial conversion.
@type {Property}
@default {Boolean} true
*/
allowPartialConversion: {
value: true
},
/**
@type {Property}
@default null
*/
convert: {
enumerable: false,
value: null
},
/**
@type {Property}
@default null
*/
revert: {
enumerable: false,
value: null
}
});
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