[IMP] base,mail: allow to customize the activity view

The activity view has been greatly improved to allow to customize it
more easily. It works quite similarly to the kanban view, defining
`<field>` tags at the top and using these fields in the `<template>`
section. The template name used to define the activity cards is
`activity-box`.

Note that these activity cards are rendered using `KanbanRecord` widget
(this has implied that ActivityView inherits from `BasicView`).

Also note that the view validation has been moved in base to include the
common grammar.

Task 1894990

1 files changed, 0 insertions, 30 deletions

diff --git a/addons/mail/validation.py b/addons/mail/validation.py
deleted file mode 100644
index 743c40f66dc..00000000000
--- a/addons/mail/validation.py
+++ /dev/null
@@ -1,30 +0,0 @@
-# -*- coding: utf-8 -*-
-import logging
-import os
-
-from lxml import etree
-
-from odoo.loglevels import ustr
-from odoo.tools import misc, view_validation
-
-_logger = logging.getLogger(__name__)
-
-_activity_validator = None
-@view_validation.validate('activity')
-def schema_activity(arch):
-    """ Check the activity view against its schema
-
-    :type arch: etree._Element
-    """
-    global _activity_validator
-
-    if _activity_validator is None:
-        with misc.file_open(os.path.join('mail', 'views', 'activity.rng')) as f:
-            _activity_validator = etree.RelaxNG(etree.parse(f))
-
-    if _activity_validator.validate(arch):
-        return True
-
-    for error in _activity_validator.error_log:
-        _logger.error(ustr(error))
-    return False