zoom level is autoamtiaclly computed if no defaults are provided

CHANGELOG

@@ -39,6 +39,8 @@ minerva (12.3.0~alpha.0) unstable; urgency=low
     about problem with a plugin (#767)
   * Small improvement: when exporting reaction and elements there is 
     possibility to filter by (sub)map (#615)
+  * Small improvement: during first opening of a map, the zoom level is 
+    automatically computed if no default information is provided
   * Bug fix: progress bar of gene genome mapping upload is refreshing properly
     (#728)
   * Bug fix: when editing project Disease and Organism could not be removed

frontend-js/src/main/js/map/CustomMap.js

@@ -94,22 +94,26 @@ CustomMap.prototype.init = function () {
     ids.push(mapType);
   }
 
+  // center map and zoom in to fit into browser window if there is no
+  // information about coordinates in the session
+  var x = self.getModel().getDefaultCenterX();
+  var y = self.getModel().getDefaultCenterY();
+  var zoom = self.getModel().getDefaultZoomLevel();
+  var autoFit = false;
+  if (self.getServerConnector().getSessionData(self.getProject()).getCenter(self.getModel()) === undefined &&
+    (x === undefined || y === undefined || zoom === undefined ||
+      x === null || y === null || zoom === null
+    )) {
+    autoFit= true;
+  }
+
   return Promise.all([self.getMapCanvas().triggerListeners('resize'),
     // noinspection SpellCheckingInspection
     self.getMapCanvas().triggerListeners('maptypeid_changed'),
     self.getMapCanvas().triggerListeners('projection_changed')
   ]).then(function () {
 
-    // center map and zoom in to fit into browser window if there is no
-    // information about coordinates in the session
-
-    var x = self.getModel().getDefaultCenterX();
-    var y = self.getModel().getDefaultCenterY();
-    var zoom = self.getModel().getDefaultZoomLevel();
-    if (self.getServerConnector().getSessionData(self.getProject()).getCenter(self.getModel()) === undefined &&
-      (x === undefined || y === undefined || zoom === undefined ||
-        x === null || y === null || zoom === null
-      )) {
+    if (autoFit) {
       var bounds = new Bounds();
       bounds.extend(self.getTopLeft());
       bounds.extend(self.getBottomRight());

frontend-js/src/test/js/SessionData-test.js

@@ -8,8 +8,8 @@ var chai = require('chai');
 var assert = chai.assert;
 var logger = require('./logger');
 
-describe('SessionData', function() {
-  it('setShowComments', function() {
+describe('SessionData', function () {
+  it('setShowComments', function () {
     var project = helper.createProject();
     var session = new SessionData(project);
     session.setShowComments(true);
@@ -18,22 +18,30 @@ describe('SessionData', function() {
     assert.notOk(session.getShowComments());
     assert.equal(logger.getWarnings().length, 0);
   });
-  
-  it('setVisibleOverlays', function() {
+
+  it('setVisibleOverlays', function () {
     var project = helper.createProject();
     var session = new SessionData(project);
-    
+
     var overlays = session.getVisibleOverlays();
-    
+
     assert.ok(overlays);
     assert.equal(overlays.length, 0);
-    
-    session.setVisibleOverlays([1,3]);
+
+    session.setVisibleOverlays([1, 3]);
     overlays = session.getVisibleOverlays();
-    
+
     assert.ok(overlays);
     assert.equal(overlays.length, 2);
-    assert.equal(overlays[0],1);
-    assert.equal(overlays[1],3);
+    assert.equal(overlays[0], 1);
+    assert.equal(overlays[1], 3);
+  });
+  it('setCenter for unknown', function () {
+    var project = helper.createProject();
+    var session = new SessionData(project);
+
+    var point = session.getCenter(project.getModels()[0]);
+
+    assert.ok(point === undefined || point === null);
   });
 });

frontend-js/src/test/js/minerva-test.js

@@ -50,7 +50,7 @@ describe('minerva global', function () {
       });
     });
     it('with overview', function () {
-      helper.setUrl("http://test/?id=complex_model_with_images");
+      helper.setUrl("http://test/?id=complex_model_with_images&zoom=5");
       var customMap;
       return ServerConnectorMock.getProject().then(function (project) {
         var options = helper.createCustomMapOptions(project);
@@ -58,6 +58,7 @@ describe('minerva global', function () {
         return minerva.create(options);
       }).then(function (result) {
         customMap = result;
+        assert.notEqual(5, ServerConnectorMock.getSessionData().getZoomLevel(customMap.getProject().getModels()[0]), "Zoom should be changed because we don't have full info about position")
         assert.ok(result);
         assert.equal(logger.getWarnings().length, 0);
         var showOverviewButton = $(".minerva-overview-button")[0];