Updates for xhtml style and gadgets

backport nexedi/erp5!880

First revert a first attempt that was incorrect and then backport a7ffbc92 which is related and make the rest apply cleanly

/reviewed-on https://lab.nexedi.com/nexedi/erp5-capago/merge_requests/41

bt5/erp5_ui_test/PathTemplateItem/portal_tests/gadget_field_zuite/testSaveAndLoad.zpt

@@ -61,6 +61,12 @@
 </tr>
 
 
+<!-- the flag used in erp5.js to warn unsaved changes is initially not set -->
+<tr>
+  <td>assertEval</td>
+  <td>selenium.browserbot.currentWindow.changed</td>
+  <td>false</td>
+</tr>
 
 <tr>
   <td>type</td>
@@ -68,6 +74,12 @@
   <td>123</td>
 </tr>
 
+<!-- the flag used in erp5.js to warn unsaved changes is set after gadget is changed -->
+<tr>
+  <td>waitForEval</td>
+  <td>selenium.browserbot.currentWindow.changed</td>
+  <td>true</td>
+</tr>
 
 
 <tr>

product/ERP5/bootstrap/erp5_xhtml_style/SkinTemplateItem/portal_skins/erp5_xhtml_style/erp5.css.css

@@ -752,6 +752,10 @@ span.search button .image {
   background-image: url('images/exec16.png');
 }
 
+.bottom_actions {
+  margin-bottom: 1em;
+}
+
 .document .actions {
   position: relative;
   float: left;

product/ERP5/bootstrap/erp5_xhtml_style/SkinTemplateItem/portal_skins/erp5_xhtml_style/erp5_gadgetfield.js.js

@@ -69,17 +69,36 @@
         return displayFieldError(argument_list[0]);
       })
 
-    .allowPublicAcquisition('translateHtml', function dummyTranslateHtml (html) {
-        // gadget translation does not work in erp5_xhtml_style, but at least
-        // gadgets can be used.
-        return html;
+    /////////////////////////////////////////////////////////////////
+    // Support some methods used in ERP5JS
+    /////////////////////////////////////////////////////////////////
+    .allowPublicAcquisition('notifyChange',
+                            function () {
+       // This flag is used for erp5.js's onBeforeUnload warning for unsaved changes.
+        window.changed = true;
+        return;
       })
-    .allowPublicAcquisition('translate', function dummyTranslate (html) {
-        // gadget translation does not work in erp5_xhtml_style, but at least
-        // gadgets can be used.
-        return html;
+
+    .allowPublicAcquisition('notifyValid',
+                            function () {
+        return;
       })
 
+    .allowPublicAcquisition('notifySubmit', function () {
+      return this.element.querySelector('form').querySelector('[type="submit"]').click();
+    })
+
+    // Comply to interface_translation.html, but without actually translating.
+    .allowPublicAcquisition('translate', function (argument_list) {
+      return argument_list[0];
+    })
+    .allowPublicAcquisition('getTranslationList', function (argument_list) {
+      return argument_list[0];
+    })
+    .allowPublicAcquisition('translateHtml', function (argument_list) {
+      return argument_list[0];
+    })
+
     /////////////////////////////////////////////////////////////////
     // declared methods
     /////////////////////////////////////////////////////////////////