Add row index to ItemClickEvent in Grid (#10754)

client/src/main/java/com/vaadin/client/connectors/grid/GridConnector.java

                 NativeEvent mouseEvent) {
             String rowKey = getRowKey((JsonObject) cell.getRow());
             String columnId = columnToIdMap.get(cell.getColumn());
+            int rowIndex = cell.getRowIndex();
             getRpcProxy(GridServerRpc.class).itemClick(rowKey, columnId,
                     MouseEventDetailsBuilder
-                            .buildMouseEventDetails(mouseEvent));
+                            .buildMouseEventDetails(mouseEvent), rowIndex);
         }
     }
 

server/src/main/java/com/vaadin/ui/Grid.java

         private final T item;
         private final Column<T, ?> column;
         private final MouseEventDetails mouseEventDetails;
+        private final int rowIndex;
 
         /**
          * Creates a new {@code ItemClick} event containing the given item and
          *
          */
         public ItemClick(Grid<T> source, Column<T, ?> column, T item,
-                MouseEventDetails mouseEventDetails) {
+                MouseEventDetails mouseEventDetails, int rowIndex) {
             super(source);
             this.column = column;
             this.item = item;
             this.mouseEventDetails = mouseEventDetails;
+            this.rowIndex = rowIndex;
         }
 
         /**
         public MouseEventDetails getMouseEventDetails() {
             return mouseEventDetails;
         }
+
+        /**
+         * Returns the clicked rowIndex.
+         *
+         * @return the clicked rowIndex
+         */
+        public int getRowIndex() {
+            return rowIndex;
+        }
     }
 
     /**
 
         @Override
         public void itemClick(String rowKey, String columnInternalId,
-                MouseEventDetails details) {
+                MouseEventDetails details, int rowIndex) {
             Column<T, ?> column = getColumnByInternalId(columnInternalId);
             T item = getDataCommunicator().getKeyMapper().get(rowKey);
-            fireEvent(new ItemClick<>(Grid.this, column, item, details));
+            fireEvent(new ItemClick<>(Grid.this, column, item, details, rowIndex));
         }
 
         @Override

shared/src/main/java/com/vaadin/shared/ui/grid/GridServerRpc.java

      *            column internal id identifying the clicked property
      * @param details
      *            mouse event details
+     * @param rowIndex
+     *            the row index of the clicked item
      */
     void itemClick(String rowKey, String columnInternalId,
-            MouseEventDetails details);
+            MouseEventDetails details, int rowIndex);
 
     /**
      * Informs the server that a context click has happened inside of Grid.

uitest/src/main/java/com/vaadin/tests/components/grid/basics/GridBasics.java

                                 !grid.isDetailsVisible(event.getItem()));
                         log("Item click on row "
                                 + event.getItem().getRowNumber() + ", Column '"
-                                + event.getColumn().getCaption() + "'");
+                                + event.getColumn().getCaption() + "' Index " + event.getRowIndex());
                     });
                     log("Registered an item click listener.");
                 }

uitest/src/test/java/com/vaadin/tests/components/grid/basics/GridEventListenersTest.java

+package com.vaadin.tests.components.grid.basics;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import com.vaadin.testbench.elements.GridElement;
+
+public class GridEventListenersTest extends GridBasicsTest {
+
+    @Test
+    public void testItemClickListener() {
+        selectMenuPath("Component", "State", "Item click listener");
+        selectMenuPath("Component", "State", "Selection model", "none");
+        checkItemClickOnRow(0);
+        checkItemClickOnRow(2);
+        GridElement grid = getGridElement();
+        grid.getHeaderCell(0, 7);
+        checkItemClickOnRow(0);
+        checkItemClickOnRow(2);
+    }
+
+    private void checkItemClickOnRow(int row) {
+        GridElement grid = getGridElement();
+        grid.getCell(row, 2).click();
+        String logRow = getLogRow(0);
+        Assert.assertTrue(
+                "Log row '" + logRow + "' did not contain index " + row,
+                logRow.endsWith("Index " + row));
+    }
+}