Calc: Fix read-only file opening in edit mode

The guard `!this._documentInfo` was intended to call `setPermission`
only on the first status message. However, `this._documentInfo` was
assigned to `textMsg` one line before the check, causing the guard
to always evaluate to false and preventing `setPermission` from
ever executing.

Move the `_documentInfo` assignment after the read-only check so
the guard functions as intended.

Signed-off-by: Darshan-upadhyay1110 <darshan.upadhyay@collabora.com>
Change-Id: Ifc9ba699eb15fb69e74776856142c6a0267f3d03

Author: Darshan-upadhyay1110

browser/src/layer/tile/CalcTileLayer.js

@@ -427,13 +427,14 @@ window.L.CalcTileLayer = window.L.CanvasTileLayer.extend({
 		if (statusJSON.width && statusJSON.height && this._documentInfo !== textMsg) {
 			const previousStatusJSON = this._lastStatusJSON ? Object.assign({}, this._lastStatusJSON): null;
 			this._lastStatusJSON = statusJSON;
-			this._documentInfo = textMsg;
-
-			var firstSelectedPart = (typeof this._selectedPart !== 'number');
 
 			if (statusJSON.readonly && !this._documentInfo)
 				this._map.setPermission('readonly');
 
+			this._documentInfo = textMsg;
+
+			var firstSelectedPart = (typeof this._selectedPart !== 'number');
+
 			app.activeDocument.fileSize = new cool.SimplePoint(statusJSON.width, statusJSON.height);
 			app.activeDocument.activeLayout.viewSize = app.activeDocument.fileSize.clone();