149 lines
3.5 KiB
JavaScript
149 lines
3.5 KiB
JavaScript
goog.provide('ol.interaction.Select');
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goog.require('goog.array');
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goog.require('goog.functions');
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goog.require('ol.FeatureOverlay');
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goog.require('ol.events.condition');
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goog.require('ol.interaction.Interaction');
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/**
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* @constructor
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* @extends {ol.interaction.Interaction}
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* @param {olx.interaction.SelectOptions} options Options.
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* @todo stability experimental
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*/
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ol.interaction.Select = function(options) {
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goog.base(this);
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/**
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* @private
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* @type {ol.events.ConditionType}
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*/
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this.condition_ = goog.isDef(options.condition) ?
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options.condition : ol.events.condition.singleClick;
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/**
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* @private
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* @type {ol.events.ConditionType}
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*/
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this.addCondition_ = goog.isDef(options.addCondition) ?
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options.addCondition : ol.events.condition.shiftKeyOnly;
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var layerFilter;
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if (goog.isDef(options.layerFilter)) {
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layerFilter = options.layerFilter;
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} else if (goog.isDef(options.layer)) {
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var layer = options.layer;
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layerFilter =
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/**
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* @param {ol.layer.Layer} l Layer.
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* @return {boolean} Include.
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*/
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function(l) {
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return l === layer;
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};
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} else if (goog.isDef(options.layers)) {
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var layers = options.layers;
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layerFilter =
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/**
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* @param {ol.layer.Layer} layer Layer.
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* @return {boolean} Include.
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*/
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function(layer) {
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return goog.array.indexOf(layers, layer) != -1;
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};
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} else {
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layerFilter = goog.functions.TRUE;
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}
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/**
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* @private
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* @type {function(ol.layer.Layer): boolean}
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*/
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this.layerFilter_ = layerFilter;
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/**
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* @private
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* @type {ol.FeatureOverlay}
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*/
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this.featureOverlay_ = new ol.FeatureOverlay({
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style: options.style
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});
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};
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goog.inherits(ol.interaction.Select, ol.interaction.Interaction);
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/**
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* @return {ol.Collection} Features collection.
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* @todo stability experimental
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*/
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ol.interaction.Select.prototype.getFeatures = function() {
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return this.featureOverlay_.getFeatures();
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};
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/**
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* @inheritDoc
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*/
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ol.interaction.Select.prototype.handleMapBrowserEvent =
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function(mapBrowserEvent) {
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if (!this.condition_(mapBrowserEvent)) {
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return true;
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}
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var add = this.addCondition_(mapBrowserEvent);
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var map = mapBrowserEvent.map;
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var features = this.featureOverlay_.getFeatures();
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if (add) {
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map.forEachFeatureAtPixel(mapBrowserEvent.pixel,
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/**
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* @param {ol.Feature} feature Feature.
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* @param {ol.layer.Layer} layer Layer.
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*/
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function(feature, layer) {
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if (goog.array.indexOf(features.getArray(), feature) == -1) {
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features.push(feature);
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}
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}, undefined, this.layerFilter_);
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} else {
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/** @type {ol.Feature|undefined} */
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var feature = map.forEachFeatureAtPixel(mapBrowserEvent.pixel,
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/**
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* @param {ol.Feature} feature Feature.
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* @param {ol.layer.Layer} layer Layer.
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*/
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function(feature, layer) {
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return feature;
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}, undefined, this.layerFilter_);
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if (goog.isDef(feature)) {
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if (features.getLength() == 1) {
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if (features.getAt(0) !== feature) {
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features.setAt(0, feature);
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}
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} else {
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if (features.getLength() != 1) {
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features.clear();
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}
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features.push(feature);
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}
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} else {
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if (features.getLength() !== 0) {
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features.clear();
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}
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}
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}
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return false;
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};
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/**
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* @inheritDoc
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*/
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ol.interaction.Select.prototype.setMap = function(map) {
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goog.base(this, 'setMap', map);
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this.featureOverlay_.setMap(map);
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};
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