diff -r 000000000000 -r bca7a7e058a3 src/pyams_skin/interfaces/__init__.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/pyams_skin/interfaces/__init__.py	Thu Feb 13 11:43:31 2020 +0100
@@ -0,0 +1,197 @@
+#
+# Copyright (c) 2008-2015 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 zope.component.interfaces import IObjectEvent, ObjectEvent
+from zope.configuration.fields import GlobalInterface
+from zope.interface import implementer, invariant, Interface, Attribute, Invalid
+from zope.schema import Text, TextLine, Choice, Int, Bool
+
+from pyams_file.schema import FileField
+from pyams_skin.layer import IPyAMSLayer
+from pyams_template.template import layout_config
+
+from pyams_skin import _
+
+
+class ISkin(Interface):
+    """Skin interface
+
+    Skins are registered as utilities implementing this interface
+    and defining request layer as attribute
+    """
+
+    label = TextLine(title="Skin name")
+
+    layer = GlobalInterface(title="Request layer",
+                            description="This interface will be used to tag request layer",
+                            required=True)
+
+
+class ISkinChangedEvent(IObjectEvent):
+    """Skin changed event"""
+
+
+@implementer(ISkinChangedEvent)
+class SkinChangedEvent(ObjectEvent):
+    """Request skin changed event"""
+
+
+class ISkinnable(Interface):
+    """Skinnable content interface"""
+
+    can_inherit_skin = Attribute("Check if skin can be inherited")
+
+    inherit_skin = Bool(title=_("Inherit parent skin?"),
+                        description=_("Should we reuse parent skin?"),
+                        required=True,
+                        default=False)
+
+    no_inherit_skin = Bool(title=_("Don't inherit parent skin?"),
+                           description=_("Should we override parent skin?"),
+                           required=True,
+                           default=True)
+
+    skin_parent = Attribute("Skin parent (local or inherited)")
+
+    skin = Choice(title=_("Custom graphic theme"),
+                  description=_("This theme will be used to handle graphic design (colors and images)"),
+                  vocabulary='PyAMS user skins',
+                  required=False)
+
+    @invariant
+    def check_skin(self):
+        if self.no_inherit_skin and not self.skin:
+            raise Invalid(_("You must select a custom skin or inherit from parent!"))
+
+    def get_skin(self, request=None):
+        """Get skin matching this content"""
+
+    custom_stylesheet = FileField(title=_("Custom stylesheet"),
+                                  description=_("This custom stylesheet will be used to override selected theme styles"),
+                                  required=False)
+
+    editor_stylesheet = FileField(title=_("Editor stylesheet"),
+                                  description=_("Styles defined into this stylesheet will be available into HTML editor"),
+                                  required=False)
+
+    custom_script = FileField(title=_("Custom script"),
+                              description=_("This custom javascript file will be used to add dynamic features to "
+                                            "selected theme"),
+                              required=False)
+
+
+class IUserSkinnable(ISkinnable):
+    """User skinnable content interface"""
+
+
+@layout_config(template='templates/fullpage-layout.pt', layer=IPyAMSLayer)
+class IFullPage(Interface):
+    """Full page marker interface"""
+
+
+@layout_config(template='templates/fullpage-modal-layout.pt', layer=IPyAMSLayer)
+class IModalFullPage(IFullPage):
+    """Full page modal dialog marker interface"""
+
+    dialog_class = Attribute("Default dialog CSS class")
+
+
+@layout_config(template='templates/inner-layout.pt', layer=IPyAMSLayer)
+class IInnerPage(Interface):
+    """Inner page marker interface"""
+
+
+@layout_config(template='templates/widget-layout.pt', layer=IPyAMSLayer)
+class IWidgetInnerPage(IInnerPage):
+    """Inner page with widget marker interface"""
+
+
+@layout_config(template='templates/modal-layout.pt', layer=IPyAMSLayer)
+class IModalPage(Interface):
+    """Modal page marker interface"""
+
+
+class IDialog(IModalPage):
+    """Modal dialog interface"""
+
+    modal_class = TextLine(title="Modal dialog CSS class",
+                           default='modal-medium')
+
+
+class IPageHeader(Interface):
+    """Page header interface used by 'header' content provider"""
+
+    back_url = TextLine(title="Back URL",
+                        required=False)
+
+    back_target = TextLine(title="Back URL target",
+                           description="HTML target selector, or None for full page target",
+                           required=False)
+
+    icon_class = TextLine(title='Icon CSS class')
+
+    title = TextLine(title='Page title')
+
+    title_badge = TextLine(title="Title badge")
+
+    title_badge_class = TextLine(title="Title badge class")
+
+    subtitle = TextLine(title='Page sub-title')
+
+    subtitle_badge = TextLine(title="Sub-title badge")
+
+    subtitle_badge_class = TextLine(title="Sub-title badge class")
+
+
+class IContentHelp(Interface):
+    """Content help block"""
+
+    outer_margin = Int(title='Outer margin size',
+                       default=0)
+
+    status = TextLine(title='Help status',
+                      default='info')
+
+    header = TextLine(title='Help header')
+
+    message = Text(title='Help message')
+
+    message_format = Choice(title='Help message format',
+                            vocabulary='PyAMS HTML renderers')
+
+
+class IContentTitle(Interface):
+    """Content title interface"""
+
+    title = Attribute("Content title")
+
+
+class IContextTitlePrefix(Interface):
+    """Context title prefix interface"""
+
+    prefix = Attribute("Context title prefix")
+
+
+class IContentSearch(Interface):
+    """Content search interface"""
+
+    def get_search_results(self, data):
+        """Extract search results from given data
+
+        `data` is a dictionary containing search fields
+        """
+
+
+class ISearchPage(Interface):
+    """Search page marker interface"""