[IIIF-148] Provide canvas index to mirador

Author: atarix83

src/mirador-viewer/config.default.js

@@ -28,6 +28,7 @@ const multi = params.get('multi');
 const notMobile = params.get('notMobile');
 const isDownloadPluginEnabled = (params.get('enableDownloadPlugin') === 'true');
 const canvasId = params.get('canvasId');
+const canvasIndex = params.get('canvasIndex');
 
 let windowSettings = {};
 let sideBarPanel = 'info';
@@ -62,6 +63,8 @@ windowSettings.manifestId = manifest;
   if (canvasId && canvasId !== 'null') {
     windowSettings.canvasId =
       `${(manifest.replace(MANIFEST_URL_PART, ''))}/canvas/${canvasId}`;
+  } else if (canvasIndex) {
+    windowSettings.canvasIndex = parseInt(canvasIndex);
   }
 })();