[document_page] FIX creating history when there are no changes made. Add history name field, to name revisions. Modified views to allow setting this field.

document_page/models/document_page.py

@@ -42,7 +42,16 @@ class DocumentPage(models.Model):
     )
 
     # no-op computed field
-    summary = fields.Char(
+    draft_name = fields.Char(
+        string='Name',
+        help='Name for the changes made',
+        compute=lambda x: x,
+        inverse=lambda x: x,
+    )
+
+    # no-op computed field
+    draft_summary = fields.Char(
+        string='Summary',
         help='Describe the changes made',
         compute=lambda x: x,
         inverse=lambda x: x,
@@ -124,10 +133,12 @@ class DocumentPage(models.Model):
     @api.multi
     def _inverse_content(self):
         for rec in self:
-            if rec.type == 'content':
+            if rec.type == 'content' and \
+                    rec.content != rec.history_head.content:
                 rec._create_history({
+                    'name': rec.draft_name,
+                    'summary': rec.draft_summary,
                     'content': rec.content,
-                    'summary': rec.summary,
                 })
 
     @api.multi

document_page/models/document_page_history.py

@@ -14,8 +14,9 @@ class DocumentPageHistory(models.Model):
     _order = 'id DESC'
 
     page_id = fields.Many2one('document.page', 'Page', ondelete='cascade')
-    summary = fields.Char('Summary', index=True)
-    content = fields.Text("Content")
+    name = fields.Char(index=True)
+    summary = fields.Char(index=True)
+    content = fields.Text()
     diff = fields.Text(compute='_compute_diff')
 
     @api.multi