Closes #1576. Adds mechanism to open windows when passed in as a config object.

__tests__/integration/mirador/index.html

@@ -11,7 +11,13 @@
     <script>document.write("<script type='text/javascript' src='../../../dist/mirador.min.js?v=" + Date.now() + "'><\/script>");</script>
     <script type="text/javascript">
      var miradorInstance = Mirador.viewer({
-       id: 'mirador'
+       id: 'mirador',
+       windows: [{
+         loadedManifest: 'https://iiif.harvardartmuseums.org/manifests/object/299843',
+       },
+       {
+         loadedManifest: 'https://iiif.harvardartmuseums.org/manifests/object/299843'
+       }]
      });
     </script>
   </body>

__tests__/integration/mirador/window_actions.test.js

@@ -10,6 +10,9 @@ describe('Window actions', () => {
     await expect(page).toClick('li button');
     await expect(page).toMatchElement('.mirador-window');
     await expect(page).toClick('.mirador-window-close');
-    await expect(page).not.toMatchElement('.mirador-window');
+    const numWindows = await page.evaluate(page => (
+      document.querySelectorAll('.mirador-window').length
+    )); // only default configed windows found
+    await expect(numWindows).toBe(2);
   });
 });

__tests__/src/lib/MiradorViewer.test.js

@@ -40,4 +40,20 @@ describe('MiradorViewer', () => {
       expect(instance.store.pluginReducers).toBeDefined();
     });
   });
+  describe('processConfig', () => {
+    it('transforms config values to actions to dispatch to store', () => {
+      instance = new MiradorViewer({
+        id: 'mirador',
+        windows: [{
+          loadedManifest: 'https://iiif.harvardartmuseums.org/manifests/object/299843',
+        },
+        {
+          loadedManifest: 'https://iiif.harvardartmuseums.org/manifests/object/299843',
+        },
+        ],
+      });
+
+      expect(Object.keys(instance.store.getState().windows).length).toBe(2);
+    });
+  });
 });

src/config/settings.js

 export default {
-  foo: 'bar',
+  windows: [],
   thumbnailNavigationHeight: 150,
 };

src/lib/MiradorViewer.js

@@ -16,15 +16,13 @@ class MiradorViewer {
   constructor(config) {
     this.config = config;
     this.processPlugins();
+    this.processConfig();
 
     const viewer = {
       actions,
       store,
     };
 
-    const action = actions.setConfig(deepmerge(settings, config));
-    store.dispatch(action);
-
     ReactDOM.render(
       <Provider store={store}>
         <ConnectedApp config={config} />
@@ -35,6 +33,22 @@ class MiradorViewer {
     return viewer;
   }
 
+  /**
+   * Process config into actions
+   */
+  processConfig() {
+    const mergedConfig = deepmerge(settings, this.config);
+    const action = actions.setConfig(mergedConfig);
+    store.dispatch(action);
+
+    mergedConfig.windows.forEach((miradorWindow) => {
+      store.dispatch(actions.fetchManifest(miradorWindow.loadedManifest));
+      store.dispatch(actions.addWindow({
+        manifestId: miradorWindow.loadedManifest,
+      }));
+    });
+  }
+
   /**
    * Process Plugins
    */