--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/pyams_default_theme/viewlet/metas/__init__.py	Tue Jan 29 15:56:55 2019 +0100
@@ -0,0 +1,55 @@
+#
+# Copyright (c) 2008-2019 Thierry Florac <tflorac AT ulthar.net>
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+
+__docformat__ = 'restructuredtext'
+
+from datetime import datetime
+
+from zope.dublincore.interfaces import IZopeDublinCore
+from zope.interface import Interface
+
+from pyams_skin.interfaces.configuration import IConfiguration
+from pyams_skin.interfaces.metas import IHTMLContentMetas
+from pyams_skin.layer import IPyAMSLayer
+from pyams_skin.metas import LinkMeta
+from pyams_utils.adapter import ContextRequestViewAdapter, adapter_config
+from pyams_utils.timezone import tztime
+from pyams_utils.url import absolute_url
+
+
+@adapter_config(name='icon', context=(Interface, IPyAMSLayer, Interface), provides=IHTMLContentMetas)
+class IconMetasAdapter(ContextRequestViewAdapter):
+    """Icon metas adapter"""
+
+    order = 20
+
+    def get_metas(self):
+        config = IConfiguration(self.request.root, None)
+        if (config is not None) and (config.icon is not None):
+            icon = config.icon
+            icon_url = absolute_url(icon, self.request)
+            icon_size = icon.get_image_size()[0]
+            dc = IZopeDublinCore(icon)
+            timestamp = datetime.timestamp(tztime(dc.modified))
+            for size in (180, 144, 114, 72, 32, 16):
+                if icon_size >= size:
+                    yield LinkMeta('apple-touch-icon',
+                                   type=icon.content_type,
+                                   href='{}/++thumb++{}x{}?_={}'.format(icon_url, size, size, timestamp),
+                                   sizes='{0}x{0}'.format(size))
+            for size in (128, 124, 32):
+                if icon_size >= size:
+                    yield LinkMeta('icon',
+                                   type=icon.content_type,
+                                   href='{}/++thumb++{}x{}?_={}'.format(icon_url, size, size, timestamp),
+                                   sizes='{0}x{0}'.format(size))
+            yield LinkMeta('shortcut-icon', type=icon.content_type, href=icon_url)