feature: add confirmation-widget doc

source/import_documentation/Mixins/validation-mixin.rst

@@ -69,4 +69,30 @@ Attributes
             confirmation-submit-text="Yes, I am"
             confirmation-submit-class="submit-button"
             confirmation-cancel-class="cancel-button"
-        ></solid-form>
\ No newline at end of file
+        ></solid-form>
+
+.. _confirmation-widget:
+``confirmation-widget``
+~~~~~~~~~~~~~~~~~~~~~~~
+    *Available from version 0.17*
+
+    Allows to insert a widget in the modal dialog, instead of ``confirmation-message`` (confirmation-widget prevails over confirmation-message).
+    The widget can contain a ``<solid-display>`` to display data from the resource concerned.
+
+    Example of confirmation-widget attribute use :
+
+    .. code:: html
+
+        <solid-widget name="confirm-delete-widget">
+            <template>
+                <div>
+                    <p>Are you sure to delete <strong><solid-display fields="name" data-src="${value}" style="display:inline-block"></solid-display></strong> ? </p>
+                </div>
+            </template>
+        ></solid-widget>
+
+        <solid-delete
+            data-src="http://server/user/"
+            confirmation-type="dialog"
+            confirmation-widget="confirm-delete-widget"
+        ></solid-delete>

source/import_documentation/attributes-list.rst

@@ -59,6 +59,10 @@ List of attributes (core framework)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    * :ref:`validation-mixin <confirmation-submit-text>`
 
+``confirmation-widget``
+~~~~~~~~~~~~~~~~~~~~~~~
+   * :ref:`validation-mixin <confirmation-widget>`
+
 ``counter-template``
 ~~~~~~~~~~~~~~~~~~~~
    * :ref:`counter-mixin <counter-mixin>`