Make content_moderation and inline_entity_form play nice

I've never used inline_entity_form so hard for me to comment, but we don't really want to add inline_entity_form specific changes in core.

I think we either need a generic way of making it work, or make the change in inline_entity_form itself.

There is one issue which wants to remove the little dropbutton we have for the publish/unpublish field, and instead provide an additional checkbox or so. I cannot find that particular issue at the moment, but when we would agree on that interaction pattern, content_moderation would not have to alter the submit button.

@Sam152 Great patch, something I notice is that when I am editing a draft of a node does not bring the draft version of the entity reference. Instead it bring the published of the entity_reference.

In my current use case this is a problem. I am not sure if this will be an expected behavior or if this should be even fix as part of this issue. What you folks think ?

Patch #2 will not be applicable to all entity references and their children as well (recursively) for a content type. I have create a patch that allows to have support for entity reference recursively, meaning that if there is an entity reference inside of another entity reference this will still add support of content moderation with inline edit form.

+++ b/core/modules/content_moderation/src/Plugin/Field/FieldWidget/ModerationStateWidget.php
@@ -169,11 +170,37 @@ public static function updateStatus($entity_type_id, ContentEntityInterface $ent
+    ¶
...
+    ¶

Spaces introduced.

Back to needs work.

These patches seem to be outdated in 8.3.x. Instead having the states button, I am getting some weird auto-complete field.

Fixed the white-space errors as per #17. Here is the updated patch.

I'm pretty sure this will be fixed by #2753717: Add select field to choose moderation state on entity forms.

Please ignore my comment from #17, that issue was unrelated to this patch.

@amateescu, I read issue #2753717: Add select field to choose moderation state on entity forms and it seem to be solving a different issue. This is temporary support for inline editing form. Just like @Sam152 mention on #3 this patch will never make it into core. For this reason, I am moving this patch into "Needs Review" so we can continue supporting this temporary solution until inline_editing_form support content_moderation.

1. +++ b/core/modules/content_moderation/src/Plugin/Field/FieldWidget/ModerationStateWidget.php
   @@ -165,11 +166,37 @@ public static function updateStatus($entity_type_id, ContentEntityInterface $ent
      public static function processActions($element, FormStateInterface $form_state, array &$form) {
   

   The widget has changed so much, we don't have processActions() anymore.

2. +++ b/core/modules/content_moderation/src/Plugin/Field/FieldWidget/ModerationStateWidget.php
   @@ -165,11 +166,37 @@ public static function updateStatus($entity_type_id, ContentEntityInterface $ent
   +    // Get the part of the form which contains the entity being moderated.Ø
   

   Don't need the 'Ø'.