Add possibility to disable collapsible attributions from Source

src/ol/control/Attribution.js

@@ -186,6 +186,11 @@ class Attribution extends Control {
         continue;
       }
 
+      const collapsible = source.getAttributionsCollapsible();
+      if (collapsible !== undefined && !collapsible) {
+        this.setCollapsible(collapsible);
+      }
+
       if (Array.isArray(attributions)) {
         for (let j = 0, jj = attributions.length; j < jj; ++j) {
           if (!(attributions[j] in lookup)) {

src/ol/source/OSM.js

@@ -76,7 +76,8 @@ class OSM extends XYZ {
       reprojectionErrorThreshold: options.reprojectionErrorThreshold,
       tileLoadFunction: options.tileLoadFunction,
       url: url,
-      wrapX: options.wrapX
+      wrapX: options.wrapX,
+      attributionsCollapsible: false
     });
 
   }

src/ol/source/Source.js

@@ -31,6 +31,7 @@ import SourceState from './State.js';
 /**
  * @typedef {Object} Options
  * @property {AttributionLike} [attributions]
+ * @property {boolean} [attributionsCollapsible] Whether attributions should be collapsible.
  * @property {import("../proj.js").ProjectionLike} projection
  * @property {SourceState} [state]
  * @property {boolean} [wrapX]
@@ -66,6 +67,13 @@ class Source extends BaseObject {
      */
     this.attributions_ = this.adaptAttributions_(options.attributions);
 
+    /**
+     * @private
+     * @type {boolean}
+     */
+    this.attributionsCollapsible_ = options.attributionsCollapsible !== undefined ?
+      options.attributionsCollapsible : true;
+
     /**
      * This source is currently loading data. Sources that defer loading to the
      * map's tile queue never set this to `true`.
@@ -120,6 +128,13 @@ class Source extends BaseObject {
     return this.attributions_;
   }
 
+  /**
+   * @return {boolean} Should the attributions be collapsible or not.
+   */
+  getAttributionsCollapsible() {
+    return this.attributionsCollapsible_;
+  }
+
   /**
    * Get the projection of the source.
    * @return {import("../proj/Projection.js").default} Projection.

src/ol/source/Tile.js

@@ -14,6 +14,7 @@ import {wrapX, getForProjection as getTileGridForProjection} from '../tilegrid.j
 /**
  * @typedef {Object} Options
  * @property {import("./Source.js").AttributionLike} [attributions]
+ * @property {boolean} [attributionsCollapsible] Whether attributions should be collapsible.
  * @property {number} [cacheSize]
  * @property {boolean} [opaque]
  * @property {number} [tilePixelRatio]
@@ -40,6 +41,7 @@ class TileSource extends Source {
 
     super({
       attributions: options.attributions,
+      attributionsCollapsible: options.attributionsCollapsible,
       projection: options.projection,
       state: options.state,
       wrapX: options.wrapX

src/ol/source/TileImage.js

@@ -17,6 +17,7 @@ import {getForProjection as getTileGridForProjection} from '../tilegrid.js';
 /**
  * @typedef {Object} Options
  * @property {import("./Source.js").AttributionLike} [attributions] Attributions.
+ * @property {boolean} [attributionsCollapsible] Whether attributions should be collapsible.
  * @property {number} [cacheSize=2048] Cache size.
  * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that
  * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to
@@ -81,7 +82,8 @@ class TileImage extends UrlTile {
       url: options.url,
       urls: options.urls,
       wrapX: options.wrapX,
-      transition: options.transition
+      transition: options.transition,
+      attributionsCollapsible: options.attributionsCollapsible
     });
 
     /**

src/ol/source/UrlTile.js

@@ -11,6 +11,7 @@ import {getKeyZXY} from '../tilecoord.js';
 /**
  * @typedef {Object} Options
  * @property {import("./Source.js").AttributionLike} [attributions]
+ * @property {boolean} [attributionsCollapsible] Whether attributions should be collapsible.
  * @property {number} [cacheSize]
  * @property {boolean} [opaque]
  * @property {import("../proj.js").ProjectionLike} [projection]
@@ -47,7 +48,8 @@ class UrlTile extends TileSource {
       tileGrid: options.tileGrid,
       tilePixelRatio: options.tilePixelRatio,
       wrapX: options.wrapX,
-      transition: options.transition
+      transition: options.transition,
+      attributionsCollapsible: options.attributionsCollapsible
     });
 
     /**

src/ol/source/XYZ.js

@@ -8,6 +8,7 @@ import {createXYZ, extentFromProjection} from '../tilegrid.js';
 /**
  * @typedef {Object} Options
  * @property {import("./Source.js").AttributionLike} [attributions] Attributions.
+ * @property {boolean} [attributionsCollapsible] Whether attributions should be collapsible.
  * @property {number} [cacheSize=2048] Cache size.
  * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.  Note that
  * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to
@@ -93,7 +94,8 @@ class XYZ extends TileImage {
       url: options.url,
       urls: options.urls,
       wrapX: options.wrapX !== undefined ? options.wrapX : true,
-      transition: options.transition
+      transition: options.transition,
+      attributionsCollapsible: options.attributionsCollapsible
     });
 
   }