Fix information about showed entries below paginated table. Closes #R…

_partials/developer-materials-results.html.slim

@@ -93,7 +93,7 @@
       option(value="25") 25
     label.inline entries
     br
-    p Showing {{paginate.currentPage}} to {{paginate.currentPage + pagination.size}} of {{data.materials.length}} entries
+    p Showing {{(paginate.currentPage * pagination.size - pagination.size + 1) | safeNumber}} to {{ Math.min(data.materials.length, paginate.currentPage * pagination.size) | safeNumber}} of {{data.materials.length | safeNumber}} entries
   .large-17.small-24.columns
     nav#paginator(ng-hide="pagination.viewall || !data.materials.length || data.loading")
       ul.pagination

javascripts/developer-materials.angular.js

@@ -233,6 +233,18 @@ dcp.filter('formatName',function(){
   }
 });
 
+/**
+ * safeNumber is an "ng filter" that accept string value
+ * and convert to number (using radix of 10). If parsing
+ * fails (NaN) then 0 is returned.
+ */
+dcp.filter('safeNumber', function() {
+  return function(input) {
+    var n = parseInt(input, 10);
+    return isNaN(n) ? 0 : n;
+  }
+});
+
 dcp.controller('developerMaterialsController', function($scope, materialService) {
 
   window.scope = $scope;
@@ -243,6 +255,12 @@ dcp.controller('developerMaterialsController', function($scope, materialService)
     size : 10
   };
 
+  // Add Math object to $scope so we can use it directly in Angular expressions
+  // like: {{ Math.min(data.materials.length, paginate.currentPage * pagination.size) }}
+  // This might not be clean technique from Angular perspective (more clear would be
+  // to do all required calculations in controller and not the view)
+  $scope.Math = Math;
+
   /*
     Handle Pagination
   */