Resolve #3390339 "Entity reference field"

Closes #3390339

config/schema/custom_field.schema.yml

@@ -136,6 +136,12 @@ custom_field.formatter.*:
         granularity:
           type: integer
           label: 'Granularity'
+        view_mode:
+          type: string
+          label: 'View mode'
+        link:
+          type: boolean
+          label: 'Link label to the referenced entity'
 
 field.formatter.settings.custom_formatter:
   type: custom_field_formatter_base
@@ -203,6 +209,9 @@ custom_field.column:
     datetime_type:
       type: string
       label: 'Date type'
+    target_type:
+      type: string
+      label: 'Type of item to reference'
 
 custom_field.widget.*:
   type: mapping
@@ -326,3 +335,68 @@ custom_field.widget.*:
             increment:
               type: integer
               label: 'increment'
+            match_operator:
+              type: string
+              label: 'Match operator'
+            match_limit:
+              type: integer
+              label: 'Match limit'
+            handler:
+              type: string
+              label: 'Handler'
+            handler_settings:
+              type: mapping
+              label: 'Handler settings'
+              mapping:
+                include_anonymous:
+                  type: boolean
+                  label: 'Include anonymous'
+                filter:
+                  type: mapping
+                  label: 'Filter'
+                  mapping:
+                    type:
+                      type: string
+                      label: 'Type'
+                sort:
+                  type: mapping
+                  label: 'Sort'
+                  mapping:
+                    field:
+                      type: string
+                      label: 'Sort by'
+                    direction:
+                      type: string
+                      label: 'Sort direction'
+                auto_create:
+                  type: boolean
+                  label: "Create referenced entities if they don't already exist"
+                target_bundles:
+                  type: sequence
+                  label: 'Target bundles'
+                  sequence:
+                    type: custom_field.target_bundles.[%bundle]
+                auto_create_bundle:
+                  type: string
+                  label: 'Store new items in'
+                view:
+                  type: mapping
+                  label: 'View used to select the entities'
+                  mapping:
+                    view_name:
+                      type: string
+                      label: 'View machine name'
+                    display_name:
+                      type: string
+                      label: 'View display name'
+                    arguments:
+                      type: sequence
+                      label: 'View arguments'
+                      sequence:
+                        type: custom_field.view_arguments.[%arg]
+
+custom_field.target_bundles.*:
+  type: string
+
+custom_field.view_arguments.*:
+  type: string