/*
* Copyright 2015-2017 WorldWind Contributors
*
* 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.
*/
define([
'../KmlElements',
'./KmlSubStyle',
'../util/Pair',
'../../../util/Promise'
], function (KmlElements,
KmlSubStyle,
Pair,
Promise) {
"use strict";
/**
* Constructs an KmlStyleMap. Applications usually don't call this constructor. It is called by {@link KmlFile} as
* objects from Kml file are read. This object is already concrete implementation.
* @alias KmlStyleMap
* @classdesc Contains the data associated with StyleMap node.
* @param node {Node} Node representing style map in the document.
* @constructor
* @throws {ArgumentError} If the node is null or undefined.
* @see https://developers.google.com/kml/documentation/kmlreference#stylemap
* @augments KmlSubStyle
*/
var KmlStyleMap = function (node) {
KmlSubStyle.call(this, node);
};
KmlStyleMap.prototype = Object.create(KmlSubStyle.prototype);
Object.defineProperties(KmlStyleMap.prototype, {
/**
* Defines a key/value pair that maps a mode (normal or highlight) to the predefined <styleUrl>.
* <Pair>
* contains two elements (both are required):
* <key>, which identifies the key
* <styleUrl> or <Style>, which references the style. In <styleUrl>, for referenced style elements that are
* local to the KML document, a simple # referencing is used. For styles that are contained in external
* files, use a full URL along with # referencing.
* @memberof KmlStyleMap.prototype
* @readonly
* @type {Pair[]}
*/
kmlPairs: {
get: function () {
return this._factory.all(this);
}
},
isMap: {
get: function() {
return true;
}
}
});
/**
* Resolve the information from style map and create the options with normal and highlight.
* @param resolve Callback to be called when all promises are resolved with correct style.
*/
KmlStyleMap.prototype.resolve = function(resolve, styleResolver) {
// Create promise which resolves, when all styles are resolved.
var self = this;
var results = {};
var promises = [];
var pairs = self.kmlPairs;
pairs.forEach(function(pair) {
var key = pair.kmlKey;
var style = pair.getStyle(styleResolver);
promises.push(style);
style.then(function(pStyle){
results[key] = pStyle.normal;
});
});
var compoundPromise = Promise.all(promises);
compoundPromise.then(function(){
if(!results['normal']){
results['normal'] = null;
}
if(!results['highlight']){
results['highlight'] = null;
}
resolve(results);
});
};
/**
* @inheritDoc
*/
KmlStyleMap.prototype.getTagNames = function() {
return ['StyleMap'];
};
KmlElements.addKey(KmlStyleMap.prototype.getTagNames()[0], KmlStyleMap);
return KmlStyleMap;
});