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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> */
/**
@module montage/core/gate
@requires montage/core/core
@requires montage/core/logger
*/
var Montage = require("montage").Montage,
logger = require("core/logger").logger("gate");
/**
@class module:montage/core/gate.Gate
@extends module:montage/core/core.Montage
*/
var Gate = exports.Gate = Montage.create(Montage,/** @lends module:montage/core/gate.Gate# */ {
/**
@function
@returns {Gate} A new Gate instance.
*/
init: {
enumerable: false,
value: function() {
this.reset();
return this;
}
},
/**
@function
@param {String} delegate The delegate to be initialized.
@returns itself
*/
initWithDelegate: {
enumerable: false,
value: function(delegate) {
this.reset();
this.delegate = delegate;
return this;
}
},
/**
@function
@param {String} propertyDescriptor The propertyDescriptor to be initialized.
@returns itself
*/
initWithDescriptor: {
enumerable: false,
value: function(propertyDescriptor) {
var fieldName;
this.reset();
for (fieldName in propertyDescriptor) {
this.setField(fieldName, propertyDescriptor[fieldName].value);
}
return this;
}
},
/**
@type {Property}
@default {Number} 0
*/
count: {
value: 0
},
/**
@type {Property}
@default {String} null
*/
table: {
value: null
},
/**
@function
@param {Array} aFieldName The aFieldName array.
@returns !table or table[aFieldName]
*/
getField: {
enumerable: false,
value: function(aFieldName) {
var table = this.table;
return !table || table[aFieldName];
}
},
/**
@function
@param {Array} aFieldName The aFieldName array.
@param {Number} value The count on the array.
*/
setField: {
enumerable: false,
value: function(aFieldName, value) {
var table = this.table,
fieldValue,
oldCount = this.count;
table = (!table ? this.table = {} : table);
fieldValue = table[aFieldName];
if (typeof fieldValue === "undefined" && !value) {
// new field
this.count++;
} else if (typeof fieldValue !== "undefined" && fieldValue !== value) {
if (value) {
this.count--;
} else {
this.count++;
}
} else if (value) {
logger.error(this, aFieldName + " was not set before.");
}
table[aFieldName] = !!value;
if (this.count === 0 && oldCount > 0) {
this.callDelegateMethod(true);
} else if (oldCount === 0 && this.count > 0) {
this.callDelegateMethod(false);
}
}
},
/**
@function
@param {Array} aFieldName The aFieldName array to be removed.
*/
removeField: {
enumerable: false,
value: function(aFieldName) {
var table = this.table, fieldValue = table[aFieldName];
if (typeof fieldValue !== "undefined" && !fieldValue) {
// if the value was false decrement the count
this.count--;
}
delete table[aFieldName];
}
},
/**
@type {Property}
@default {String} null
*/
delegate: {
enumerable: false,
value: null
},
/**
@function
@param {Number} value The value to be called.
*/
callDelegateMethod: {
value: function(value) {
var delegateMethod;
if (this.delegate && typeof (delegateMethod = this.delegate["gateDidBecome" + (value ? "True" : "False")]) === "function") {
delegateMethod.call(this.delegate, this);
}
},
enumerable: false
},
/**
@type {Function}
@returns this.count === 0
*/
value: {
enumerable: false,
get: function() {
return this.count === 0;
}
},
/**
@function
*/
reset: {
enumerable: false,
value: function() {
this.table = {};
this.count = 0;
}
},
/**
@function
@returns {String} result
*/
toString: {
value: function() {
var fieldNames = this._fields,
i,
iField,
result = "";
for (i = 0; (iField = fieldNames[i]); i++) {
result += iField + "[" + (this._value & fieldNames[iField]) + "], ";
}
return result;
}
}
});
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