[ADD] mail: quick-open related record from email

Current behavior before PR: You have to find the right menu/view and then take
over the ID stored on the email to find back the record. This is annoying,
painful and error prone.

Desired behavior after PR is merged: By adding a smartbutton the user can
quick-navigate to the related record in a second. This allows for quickly
finding and opening records which is usually handy when debugging things.

Task-2868230

closes odoo/odoo#91228

Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>

addons/mail/models/mail_mail.py

@@ -158,6 +158,17 @@ class MailMail(models.Model):
     def action_retry(self):
         self.filtered(lambda mail: mail.state == 'exception').mark_outgoing()
 
+    def action_open_document(self):
+        """ Opens the related record based on the model and ID """
+        self.ensure_one()
+        return {
+            'res_id': self.res_id,
+            'res_model': self.model,
+            'target': 'current',
+            'type': 'ir.actions.act_window',
+            'view_mode': 'form',
+        }
+
     def mark_outgoing(self):
         return self.write({'state': 'outgoing'})
 

addons/mail/views/mail_mail_views.xml

@@ -13,6 +13,11 @@
                         <field name="state" widget="statusbar" statusbar_visible="outgoing,sent,received,exception,cancel"/>
                     </header>
                     <sheet>
+                        <div class="oe_button_box" name="button_box">
+                            <button name="action_open_document" string="Open Document"
+                                    type="object" class="oe_link" icon="fa-file-text-o"
+                                    attrs="{'invisible': ['|', ('model', '=', False), ('res_id', '=', 0)]}"/>
+                        </div>
                         <field name="mail_message_id_int" required="0" invisible="1"/>
                         <label for="subject" class="oe_edit_only"/>
                         <h2><field name="subject"/></h2>