feat: configure min and max rows in text area (#6828)

* feat: configure min and max rows in text area

* Update vaadin-text-field-flow-parent/vaadin-text-field-flow/src/main/java/com/vaadin/flow/component/textfield/TextArea.java

Co-authored-by: Sergey Vinogradov <[email protected]>

---------

Co-authored-by: Sergey Vinogradov <[email protected]>

Author: sissbruecker

vaadin-text-field-flow-parent/vaadin-text-field-flow/src/main/java/com/vaadin/flow/component/textfield/TextArea.java

@@ -399,6 +399,59 @@ public String getPattern() {
         return getElement().getProperty("pattern");
     }
 
+    /**
+     * The minimum number of rows to show.
+     *
+     * @return the minimum number of rows
+     */
+    public int getMinRows() {
+        return getElement().getProperty("minRows", 2);
+    }
+
+    /**
+     * Sets the minimum number of rows to show. Default is two rows.
+     *
+     * @param minRows
+     *            the minimum number of rows to show
+     */
+    public void setMinRows(int minRows) {
+        getElement().setProperty("minRows", minRows);
+    }
+
+    /**
+     * Maximum number of rows to expand to before the component starts
+     * scrolling.
+     *
+     * @return the maximum number of rows, or {@code null} if the maximum has
+     *         not been set
+     */
+    public Integer getMaxRows() {
+        String maxRows = getElement().getProperty("maxRows");
+        if (maxRows != null && !maxRows.isEmpty()) {
+            return Integer.parseInt(maxRows);
+        }
+
+        return null;
+    }
+
+    /**
+     * Sets the maximum number of rows to expand to before the component starts
+     * scrolling. This effectively sets a max-height on the {@code input-field}
+     * part. By default, the value is {@code null}, which means the component
+     * grows with the content without constraints.
+     *
+     * @param maxRows
+     *            the maximum number of rows, or {@code null} to remove the
+     *            maximum
+     */
+    public void setMaxRows(Integer maxRows) {
+        if (maxRows != null) {
+            getElement().setProperty("maxRows", maxRows);
+        } else {
+            getElement().removeProperty("maxRows");
+        }
+    }
+
     @Override
     public String getEmptyValue() {
         return "";

vaadin-text-field-flow-parent/vaadin-text-field-flow/src/test/java/com/vaadin/flow/component/textfield/tests/TextAreaTest.java

@@ -215,4 +215,41 @@ public void implementsInputField() {
         Assert.assertTrue(
                 field instanceof InputField<AbstractField.ComponentValueChangeEvent<TextArea, String>, String>);
     }
+
+    @Test
+    public void getMinRows_defaultValue() {
+        TextArea field = new TextArea();
+
+        Assert.assertEquals(2, field.getMinRows());
+    }
+
+    @Test
+    public void setMinRows() {
+        TextArea field = new TextArea();
+        field.setMinRows(5);
+
+        Assert.assertEquals(5, field.getMinRows());
+        Assert.assertEquals(5, field.getElement().getProperty("minRows", 0));
+    }
+
+    @Test
+    public void getMaxRows_defaultValue() {
+        TextArea field = new TextArea();
+
+        Assert.assertNull(field.getMaxRows());
+    }
+
+    @Test
+    public void setMaxRows() {
+        TextArea field = new TextArea();
+        field.setMaxRows(5);
+
+        Assert.assertEquals(5, (int) field.getMaxRows());
+        Assert.assertEquals(5, field.getElement().getProperty("maxRows", 0));
+
+        field.setMaxRows(null);
+
+        Assert.assertNull(field.getMaxRows());
+        Assert.assertNull(field.getElement().getProperty("maxRows"));
+    }
 }