Query the layer only on when he is visible

contribs/gmf/src/services/querymanager.js

@@ -19,41 +19,41 @@ goog.require('ngeo.Query');
  *
  * @constructor
  * @struct
- * @param {ngeo.Query} ngeoQuery The ngeo Query service.
- * @param {gmf.Themes} gmfThemes The gmf Themes service.
- * @param {angular.$q} $q Angular q service
+ * @param {!ngeo.Query} ngeoQuery The ngeo Query service.
+ * @param {!gmf.Themes} gmfThemes The gmf Themes service.
+ * @param {!angular.$q} $q Angular q service
  * @ngInject
  * @ngdoc service
  * @ngname gmfThemes
  */
 gmf.QueryManager = function(ngeoQuery, gmfThemes, $q) {
 
   /**
-   * @type {ngeo.Query}
+   * @type {!ngeo.Query}
    * @private
    */
   this.ngeoQuery_ = ngeoQuery;
 
   /**
-   * @type {gmf.Themes}
+   * @type {!gmf.Themes}
    * @private
    */
   this.gmfThemes_ = gmfThemes;
 
   /**
-   * @type {angular.$q}
+   * @type {!angular.$q}
    * @private
    */
   this.$q_ = $q;
 
   /**
-   * @type {Array.<ngeox.QuerySource>}
+   * @type {!Array.<!ngeox.QuerySource>}
    * @private
    */
   this.sources_ = [];
 
   /**
-   * @type {Object.<number|string, ngeox.QuerySource>}
+   * @type {!Object.<number|string, !ngeox.QuerySource>}
    * @private
    */
   this.cache_ = {};
@@ -144,8 +144,9 @@ gmf.QueryManager.prototype.createSources_ = function(firstLevelGroup, node, ogcS
   // Don't create sources for WMTS layers without wmsUrl and ogcServer,
   // they are not queryable.
   if (gmfLayer.type === 'WMTS') {
-    layers = meta.queryLayers || meta.wmsLayers;
-    if (layers && meta.ogcServer && ogcServers[meta.ogcServer]) {
+    var layers_ = meta.queryLayers || meta.wmsLayers;
+    if (layers_ && meta.ogcServer && ogcServers[meta.ogcServer]) {
+      layers = layers_.split(',');
       ogcServer = ogcServers[meta.ogcServer];
     } else {
       return;
@@ -156,7 +157,7 @@ gmf.QueryManager.prototype.createSources_ = function(firstLevelGroup, node, ogcS
   var gmfLayerWMS;
   if (gmfLayer.type === 'WMS') {
     gmfLayerWMS = /** @type gmfThemes.GmfLayerWMS */ (gmfLayer);
-    layers = gmfLayerWMS.layers;
+    layers = gmfLayerWMS.layers.split(',');
     if (!firstLevelGroup || firstLevelGroup.mixed) {
       goog.asserts.assert(gmfLayerWMS.ogcServer);
       ogcServer = ogcServers[/** @type string */ (gmfLayerWMS.ogcServer)];
@@ -165,43 +166,45 @@ gmf.QueryManager.prototype.createSources_ = function(firstLevelGroup, node, ogcS
       ogcServer = ogcServers[/** @type string */ (firstLevelGroup.ogcServer)];
     }
   }
-  var childLayers = layers;
   if (!this.cache_[id]) {
-    if (validateLayerParams) {
-      // Some nodes have child layers, i.e. a list of layer names that are
-      // part of a group. The name of the group itself can't be used 'as-is'
-      // as an identifier of the layers for this source. For example, a
-      // group named 'osm' might result in returning 'restaurant' features.
-      // This override makes sure that those layer names are used instead of
-      // the original one.
-      if (gmfLayerWMS.childLayers && gmfLayerWMS.childLayers.length) {
-        // skip layers with no queryable childLayer
-        var isQueryable = function(item) {
-          return item.queryable;
-        };
-        if (!gmfLayerWMS.childLayers.some(isQueryable)) {
-          return;
-        }
-
-        var childLayerNames = [];
-        gmfLayerWMS.childLayers.forEach(function(childLayer) {
-          if (childLayer.queryable) {
-            childLayerNames.push(childLayer.name);
-          }
-        }, this);
-        childLayers = childLayerNames.join(',');
-      }
-    }
 
     goog.asserts.assert(ogcServer.urlWfs);
-    goog.asserts.assert(childLayers);
     goog.asserts.assert(layers);
 
     var source = {
       'id': id,
       'identifierAttributeField': identifierAttributeField,
       'label': name,
-      'params': {'LAYERS': childLayers},
+      'getLayers': function(resolution) {
+        var childLayers = layers;
+        goog.asserts.assert(childLayers);
+        if (validateLayerParams) {
+          // Some nodes have child layers, i.e. a list of layer names that are
+          // part of a group. The name of the group itself can't be used 'as-is'
+          // as an identifier of the layers for this source. For example, a
+          // group named 'osm' might result in returning 'restaurant' features.
+          // This override makes sure that those layer names are used instead of
+          // the original one.
+          if (gmfLayerWMS.childLayers && gmfLayerWMS.childLayers.length) {
+            // skip layers with no queryable childLayer
+            var isQueryable = function(item) {
+              return item.queryable && resolution >= item.minResolutionHint && resolution <= item.maxResolutionHint;
+            };
+            if (!gmfLayerWMS.childLayers.some(isQueryable)) {
+              return [];
+            }
+
+            var childLayerNames = [];
+            gmfLayerWMS.childLayers.forEach(function(childLayer) {
+              if (childLayer.queryable) {
+                childLayerNames.push(childLayer.name);
+              }
+            }, this);
+            childLayers = childLayerNames;
+          }
+        }
+        return childLayers;
+      },
       'layers': layers,
       'dimensions': node.dimensions || firstLevelGroup.dimensions,
       'url': ogcServer.urlWfs,

contribs/gmf/test/spec/services/querymanager.spec.js

@@ -47,7 +47,7 @@ describe('gmf.QueryManager', function() {
       // background layer
       var bgLayerSource = getSourceById(queryManager.sources_, 115);
       expect(bgLayerSource).not.toBeNull();
-      expect(bgLayerSource.params.LAYERS).toBe('ch.swisstopo.dreiecksvermaschung');
+      expect(bgLayerSource.getLayers(0).join(',')).toBe('ch.swisstopo.dreiecksvermaschung');
       expect(bgLayerSource.url).toBe('https://wms.geo.admin.ch?lang=fr');
     });
   });
@@ -62,22 +62,22 @@ describe('gmf.QueryManager', function() {
       // Child 0 (osm_time) is queryable and has wfs support.
       children = firstLevelGroup.children[0]; // osm_time
       osmSource = getSourceById(queryManager.sources_, children.id);
-      expect(osmSource.params.LAYERS).toBe('osm_time');
+      expect(osmSource.getLayers(0).join(',')).toBe('osm_time');
       expect(osmSource.wfsQuery).toBe(true);
 
       // Child 8 (srtm) is not queryable
       children = firstLevelGroup.children[8];
       osmSource = getSourceById(queryManager.sources_, children.id);
       expect(children.childLayers[0].queryable).toBe(false);
-      expect(osmSource).toBeNull();
+      expect(osmSource.getLayers(0).join(',')).toBe('');
     });
 
     it('Creates sources on queryable layer without WFS support', function() {
       var osmTheme = gmf.Themes.findThemeByName(themes.themes, 'Cadastre');
       var firstLevelGroup = osmTheme.children[0]; // 'Cadastre'
       queryManager.createSources_(firstLevelGroup, firstLevelGroup, themes.ogcServers);
       var osmSource = getSourceById(queryManager.sources_, 115);
-      expect(osmSource.params.LAYERS).toBe('ch.swisstopo.dreiecksvermaschung');
+      expect(osmSource.getLayers(0).join(',')).toBe('ch.swisstopo.dreiecksvermaschung');
       expect(osmSource.wfsQuery).toBe(false);
     });
 
@@ -95,12 +95,12 @@ describe('gmf.QueryManager', function() {
       // `queryLayers`. (`queryLayers` takes precedence over `wmsLayers`)
       var sourceAlpConvention = getSourceById(queryManager.sources_, 115);
       expect(sourceAlpConvention).not.toBeNull();
-      expect(sourceAlpConvention.params.LAYERS).toBe('ch.swisstopo.dreiecksvermaschung');
+      expect(sourceAlpConvention.getLayers(0).join(',')).toBe('ch.swisstopo.dreiecksvermaschung');
 
       // layer 'ch.astra.ausnahmetransportrouten' with `wmsUrl` and `queryLayers`
       var sourceRoutes = getSourceById(queryManager.sources_, 116);
       expect(sourceRoutes).not.toBeNull();
-      expect(sourceRoutes.params.LAYERS).toBe('ch.swisstopo.geologie-gravimetrischer_atlas');
+      expect(sourceRoutes.getLayers(0).join(',')).toBe('ch.swisstopo.geologie-gravimetrischer_atlas');
     });
 
     // FIXME no data to run this test

examples/bboxquery.js

@@ -90,6 +90,7 @@ app.MainController = function($scope, ngeoQuery) {
   ngeoQuery.addSource({
     'id': busStopSourceId,
     'layer': busStopLayer,
+    'layers': ['bus_stop'],
     'wfsQuery': true
   });
 
@@ -104,6 +105,7 @@ app.MainController = function($scope, ngeoQuery) {
   ngeoQuery.addSource({
     'id': informationSourceId,
     'layer': informationLayer,
+    'layers': ['information'],
     'wfsQuery': true
   });
 

examples/mapquery.js

@@ -99,7 +99,8 @@ app.MainController = function($scope, ngeoQuery, ngeoToolActivateMgr) {
   });
   ngeoQuery.addSource({
     'id': busStopSourceId,
-    'layer': busStopLayer
+    'layer': busStopLayer,
+    layers: ['bus_stop']
   });
 
   var informationSourceId = 'information';
@@ -112,7 +113,8 @@ app.MainController = function($scope, ngeoQuery, ngeoToolActivateMgr) {
   });
   ngeoQuery.addSource({
     'id': informationSourceId,
-    'layer': informationLayer
+    'layer': informationLayer,
+    layers: ['information']
   });
 
   /**

options/ngeox.js

@@ -428,18 +428,18 @@ ngeox.QueryOptions.prototype.geometryName;
 /**
  * The configuration of a source for the Query service.
  * @typedef {{
- *     format: (ol.format.Feature|undefined),
+ *     format: (!ol.format.Feature|undefined),
  *     id: (number|string),
  *     identifierAttributeField: (string|undefined),
  *     infoFormat: (string|undefined),
  *     label: (string|undefined),
- *     layer: (ol.layer.Base|undefined),
- *     layers: (string|undefined),
- *     params: (Object.<string, *>|undefined),
+ *     layer: (!ol.layer.Base|undefined),
+ *     layers: (!Array.<string>|undefined),
+ *     getLayers: (function(number): !Array.<string>|undefined),
  *     serverType: (string|undefined),
  *     url: (string|undefined),
  *     validateLayerParams: (boolean|undefined),
- *     wmsSource: (ol.source.ImageWMS|ol.source.TileWMS|undefined),
+ *     wmsSource: (!ol.source.ImageWMS|!ol.source.TileWMS|undefined),
  *     wfsQuery: (boolean|undefined)
  * }}
  */
@@ -448,7 +448,7 @@ ngeox.QuerySource;
 
 /**
  * The used to read the returned features from query requests for this source.
- * @type {ol.format.Feature|undefined}
+ * @type {!ol.format.Feature|undefined}
  */
 ngeox.QuerySource.prototype.format;
 
@@ -487,24 +487,23 @@ ngeox.QuerySource.prototype.label;
  * A reference to the ol3 layer object. If not defined, will be automatically
  * fetched using the source `name` and the according layer property that has
  * the same value.
- * @type {ol.layer.Base|undefined}
+ * @type {!ol.layer.Base|undefined}
  */
 ngeox.QuerySource.prototype.layer;
 
 
 /**
- * A reference to the ol3 layers names. Multiple layers names can be separated
- * by a comma.
- * @type {string|undefined}
+ * A reference to the ol3 layers names. Multiple layers names.
+ * @type {!Array.<string>|undefined}
  */
 ngeox.QuerySource.prototype.layers;
 
 
 /**
  * Additionnal params to use when querying this source.
- * @type {Object.<string, *>|undefined}
+ * @type {function(number): !Array.<string>|undefined}
  */
-ngeox.QuerySource.prototype.params;
+ngeox.QuerySource.prototype.getLayers;
 
 
 /**
@@ -547,7 +546,7 @@ ngeox.QuerySource.prototype.validateLayerParams;
  * the layer source object will be used (if it's WMS), otherwise one will
  * be created by the query service using the `url` and `params` properties of
  * this source.
- * @type {ol.source.ImageWMS|ol.source.TileWMS|undefined}
+ * @type {!ol.source.ImageWMS|!ol.source.TileWMS|undefined}
  */
 ngeox.QuerySource.prototype.wmsSource;