Move layer files so they are named like their provides
This commit is contained in:
Tim Schaub
237
src/ol/layer/group.js
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237
src/ol/layer/group.js
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@@ -0,0 +1,237 @@
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goog.provide('ol.layer.Group');
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goog.require('ol.Collection');
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goog.require('ol.Object');
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goog.require('ol.ObjectEventType');
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goog.require('ol.events');
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goog.require('ol.events.EventType');
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goog.require('ol.extent');
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goog.require('ol.layer.Base');
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goog.require('ol.object');
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goog.require('ol.source.State');
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/**
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* @enum {string}
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*/
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ol.layer.GroupProperty = {
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LAYERS: 'layers'
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};
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/**
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* @classdesc
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* A {@link ol.Collection} of layers that are handled together.
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*
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* A generic `change` event is triggered when the group/Collection changes.
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*
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* @constructor
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* @extends {ol.layer.Base}
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* @param {olx.layer.GroupOptions=} opt_options Layer options.
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* @api stable
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*/
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ol.layer.Group = function(opt_options) {
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var options = opt_options || {};
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var baseOptions = /** @type {olx.layer.GroupOptions} */
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(ol.object.assign({}, options));
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delete baseOptions.layers;
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var layers = options.layers;
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ol.layer.Base.call(this, baseOptions);
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/**
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* @private
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* @type {Array.<ol.EventsKey>}
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*/
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this.layersListenerKeys_ = [];
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/**
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* @private
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* @type {Object.<string, Array.<ol.EventsKey>>}
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*/
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this.listenerKeys_ = {};
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ol.events.listen(this,
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ol.Object.getChangeEventType(ol.layer.GroupProperty.LAYERS),
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this.handleLayersChanged_, this);
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if (layers) {
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if (Array.isArray(layers)) {
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layers = new ol.Collection(layers.slice());
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} else {
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ol.assert(layers instanceof ol.Collection,
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43); // Expected `layers` to be an array or an `ol.Collection`
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layers = layers;
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}
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} else {
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layers = new ol.Collection();
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}
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this.setLayers(layers);
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};
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ol.inherits(ol.layer.Group, ol.layer.Base);
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/**
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* @private
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*/
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ol.layer.Group.prototype.handleLayerChange_ = function() {
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if (this.getVisible()) {
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this.changed();
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}
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};
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/**
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* @param {ol.events.Event} event Event.
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* @private
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*/
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ol.layer.Group.prototype.handleLayersChanged_ = function(event) {
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this.layersListenerKeys_.forEach(ol.events.unlistenByKey);
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this.layersListenerKeys_.length = 0;
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var layers = this.getLayers();
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this.layersListenerKeys_.push(
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ol.events.listen(layers, ol.Collection.EventType.ADD,
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this.handleLayersAdd_, this),
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ol.events.listen(layers, ol.Collection.EventType.REMOVE,
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this.handleLayersRemove_, this));
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for (var id in this.listenerKeys_) {
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this.listenerKeys_[id].forEach(ol.events.unlistenByKey);
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}
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ol.object.clear(this.listenerKeys_);
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var layersArray = layers.getArray();
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var i, ii, layer;
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for (i = 0, ii = layersArray.length; i < ii; i++) {
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layer = layersArray[i];
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this.listenerKeys_[ol.getUid(layer).toString()] = [
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ol.events.listen(layer, ol.ObjectEventType.PROPERTYCHANGE,
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this.handleLayerChange_, this),
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ol.events.listen(layer, ol.events.EventType.CHANGE,
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this.handleLayerChange_, this)
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];
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}
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this.changed();
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};
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/**
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* @param {ol.Collection.Event} collectionEvent Collection event.
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* @private
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*/
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ol.layer.Group.prototype.handleLayersAdd_ = function(collectionEvent) {
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var layer = /** @type {ol.layer.Base} */ (collectionEvent.element);
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var key = ol.getUid(layer).toString();
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goog.DEBUG && console.assert(!(key in this.listenerKeys_),
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'listeners already registered');
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this.listenerKeys_[key] = [
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ol.events.listen(layer, ol.ObjectEventType.PROPERTYCHANGE,
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this.handleLayerChange_, this),
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ol.events.listen(layer, ol.events.EventType.CHANGE,
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this.handleLayerChange_, this)
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];
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this.changed();
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};
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/**
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* @param {ol.Collection.Event} collectionEvent Collection event.
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* @private
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*/
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ol.layer.Group.prototype.handleLayersRemove_ = function(collectionEvent) {
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var layer = /** @type {ol.layer.Base} */ (collectionEvent.element);
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var key = ol.getUid(layer).toString();
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goog.DEBUG && console.assert(key in this.listenerKeys_, 'no listeners to unregister');
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this.listenerKeys_[key].forEach(ol.events.unlistenByKey);
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delete this.listenerKeys_[key];
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this.changed();
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};
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/**
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* Returns the {@link ol.Collection collection} of {@link ol.layer.Layer layers}
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* in this group.
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* @return {!ol.Collection.<ol.layer.Base>} Collection of
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* {@link ol.layer.Base layers} that are part of this group.
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* @observable
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* @api stable
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*/
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ol.layer.Group.prototype.getLayers = function() {
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return /** @type {!ol.Collection.<ol.layer.Base>} */ (this.get(
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ol.layer.GroupProperty.LAYERS));
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};
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/**
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* Set the {@link ol.Collection collection} of {@link ol.layer.Layer layers}
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* in this group.
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* @param {!ol.Collection.<ol.layer.Base>} layers Collection of
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* {@link ol.layer.Base layers} that are part of this group.
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* @observable
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* @api stable
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*/
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ol.layer.Group.prototype.setLayers = function(layers) {
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this.set(ol.layer.GroupProperty.LAYERS, layers);
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};
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/**
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* @inheritDoc
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*/
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ol.layer.Group.prototype.getLayersArray = function(opt_array) {
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var array = opt_array !== undefined ? opt_array : [];
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this.getLayers().forEach(function(layer) {
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layer.getLayersArray(array);
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});
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return array;
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};
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/**
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* @inheritDoc
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*/
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ol.layer.Group.prototype.getLayerStatesArray = function(opt_states) {
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var states = opt_states !== undefined ? opt_states : [];
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var pos = states.length;
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this.getLayers().forEach(function(layer) {
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layer.getLayerStatesArray(states);
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});
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var ownLayerState = this.getLayerState();
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var i, ii, layerState;
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for (i = pos, ii = states.length; i < ii; i++) {
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layerState = states[i];
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layerState.opacity *= ownLayerState.opacity;
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layerState.visible = layerState.visible && ownLayerState.visible;
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layerState.maxResolution = Math.min(
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layerState.maxResolution, ownLayerState.maxResolution);
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layerState.minResolution = Math.max(
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layerState.minResolution, ownLayerState.minResolution);
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if (ownLayerState.extent !== undefined) {
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if (layerState.extent !== undefined) {
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layerState.extent = ol.extent.getIntersection(
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layerState.extent, ownLayerState.extent);
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} else {
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layerState.extent = ownLayerState.extent;
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}
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}
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}
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return states;
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};
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/**
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* @inheritDoc
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*/
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ol.layer.Group.prototype.getSourceState = function() {
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return ol.source.State.READY;
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};
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