Handle attribution visiblity for tile layers

src/ol/base/coveragearea.js

@@ -7,36 +7,25 @@ goog.require('ol.Extent');
 /**
  * @constructor
  * @param {ol.Extent} extent Extent.
- * @param {number} minZ Minimum Z.
- * @param {number} maxZ Maximum Z.
  */
-ol.CoverageArea = function(extent, minZ, maxZ) {
+ol.CoverageArea = function(extent) {
 
   /**
    * @type {ol.Extent}
    */
   this.extent = extent;
 
-  /**
-   * @type {number}
-   */
-  this.minZ = minZ;
-
-  /**
-   * @type {number}
-   */
-  this.maxZ = maxZ;
-
 };
 
 
 /**
  * @param {ol.Extent} extent Extent.
- * @param {number} z Z.
+ * @param {number} resolution Resolution.
  * @return {boolean} Intersects.
  */
-ol.CoverageArea.prototype.intersectsWithZ = function(extent, z) {
-  return this.extent.intersects(extent) && this.minZ <= z && z <= this.maxZ;
+ol.CoverageArea.prototype.intersectsExtentAndResolution =
+    function(extent, resolution) {
+  return this.extent.intersects(extent);
 };
 
 
@@ -46,5 +35,5 @@ ol.CoverageArea.prototype.intersectsWithZ = function(extent, z) {
  */
 ol.CoverageArea.prototype.transform = function(transformFn) {
   var extent = this.extent.transform(transformFn);
-  return new ol.CoverageArea(extent, this.minZ, this.maxZ);
+  return new ol.CoverageArea(extent);
 };