Merge pull request #1613 from twpayne/select-interaction

Port ol.interaction.Select

src/ol/interaction/selectinteraction.exports

@@ -0,0 +1,3 @@
+@exportSymbol ol.interaction.Select
+@exportProperty ol.interaction.Select.prototype.getFeaturesOverlay
+@exportProperty ol.interaction.Select.prototype.setMap

src/ol/interaction/selectinteraction.js

@@ -0,0 +1,141 @@
+goog.provide('ol.interaction.Select');
+
+goog.require('goog.array');
+goog.require('goog.functions');
+goog.require('ol.events.condition');
+goog.require('ol.interaction.Interaction');
+goog.require('ol.render.FeaturesOverlay');
+
+
+
+/**
+ * @constructor
+ * @extends {ol.interaction.Interaction}
+ * @param {olx.interaction.SelectOptions=} opt_options Options.
+ */
+ol.interaction.Select = function(opt_options) {
+
+  var options = goog.isDef(opt_options) ? opt_options : {};
+
+  goog.base(this);
+
+  /**
+   * @private
+   * @type {ol.events.ConditionType}
+   */
+  this.condition_ = goog.isDef(options.condition) ?
+      options.condition : ol.events.condition.singleClick;
+
+  /**
+   * @private
+   * @type {ol.events.ConditionType}
+   */
+  this.addCondition_ = goog.isDef(options.addCondition) ?
+      options.addCondition : ol.events.condition.shiftKeyOnly;
+
+  var layerFilter;
+  if (goog.isDef(options.layerFilter)) {
+    layerFilter = options.layerFilter;
+  } else if (goog.isDef(options.layer)) {
+    var layer = options.layer;
+    layerFilter = function(l) {
+      return l === layer;
+    };
+  } else if (goog.isDef(options.layers)) {
+    var layers = options.layers;
+    layerFilter = function(layer) {
+      return goog.array.indexOf(layers, layer) != -1;
+    };
+  } else {
+    layerFilter = goog.functions.TRUE;
+  }
+
+  /**
+   * @private
+   * @type {function(ol.layer.Layer): boolean}
+   */
+  this.layerFilter_ = layerFilter;
+
+  /**
+   * @private
+   * @type {ol.render.FeaturesOverlay}
+   */
+  this.featuresOverlay_ = options.featuresOverlay;
+
+};
+goog.inherits(ol.interaction.Select, ol.interaction.Interaction);
+
+
+/**
+ * @return {ol.render.FeaturesOverlay} Features overlay.
+ */
+ol.interaction.Select.prototype.getFeaturesOverlay = function() {
+  return this.featuresOverlay_;
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.interaction.Select.prototype.handleMapBrowserEvent =
+    function(mapBrowserEvent) {
+  if (!this.condition_(mapBrowserEvent)) {
+    return true;
+  }
+  var add = this.addCondition_(mapBrowserEvent);
+  var map = mapBrowserEvent.map;
+  var features = this.featuresOverlay_.getFeatures();
+  map.withFrozenRendering(
+      /**
+       * @this {ol.interaction.Select}
+       */
+      function() {
+        if (add) {
+          map.forEachFeatureAtPixel(mapBrowserEvent.getPixel(),
+              /**
+               * @param {ol.Feature} feature Feature.
+               * @param {ol.layer.Layer} layer Layer.
+               */
+              function(feature, layer) {
+                if (goog.array.indexOf(features.getArray(), feature) == -1) {
+                  features.push(feature);
+                }
+              }, undefined, this.layerFilter_);
+        } else {
+          var feature = map.forEachFeatureAtPixel(mapBrowserEvent.getPixel(),
+              /**
+               * @param {ol.Feature} feature Feature.
+               * @param {ol.layer.Layer} layer Layer.
+               */
+              function(feature, layer) {
+                return feature;
+              }, undefined, this.layerFilter_);
+          if (goog.isDef(feature)) {
+            if (features.getLength() == 1) {
+              if (features.getAt(0) !== feature) {
+                features.setAt(0, feature);
+              }
+            } else {
+              if (features.getLength() != 1) {
+                features.clear();
+              }
+              features.push(feature);
+            }
+          } else {
+            if (features.getLength() !== 0) {
+              features.clear();
+            }
+          }
+        }
+      }, this);
+  return false;
+};
+
+
+/**
+ * @inheritDoc
+ */
+ol.interaction.Select.prototype.setMap = function(map) {
+  goog.base(this, 'setMap', map);
+  this.featuresOverlay_.setMap(map);
+};