def is_valid_logo(value):
"""Check if the image is a valid logo:
* Logos should have a wide aspect ratio, not a square icon
* Logos should be no wider than 600px, and no taller than 60px
"""
if not value:
return True
filename, data = b64decode_file(value)
width, height = Image.open(StringIO(data)).size
if width <= height:
raise Invalid(_(u'Image should have a wide aspect ratio.'))
if width > 600 or height > 60:
raise Invalid(
_(u'Image should be no wider than 600px, and no taller than 60px.')
)
return True
class IAMPSettings(model.Schema):
"""Schema for the control panel form."""
form.widget('publisher_logo', NamedImageFieldWidget)
publisher_logo = schema.ASCII(
title=_(u'Publisher Logo'),
description=_(
u'The logo of the publisher. Should have a wide aspect ratio, '
u'and should be no wider than 600px, and no taller than 60px.'),
required=False,
constraint=is_valid_logo,
)
form.widget('amp_analytics', rows=15)
amp_analytics = schema.Text(
title=_(u'AMP Analytics'),
description=_(
u'The value (in JSON-LD format) of the "amp-analytics" element '
u'that will be used to measure activity on AMP documents.'),
required=False,
default=u'',
constraint=is_json,
)
class IAMPSettings(model.Schema):
"""Schema for the control panel form."""
form.widget('publisher_logo', NamedImageFieldWidget)
publisher_logo = schema.ASCII(
title=_(u'Publisher Logo'),
description=_(
u'The logo of the publisher. Should have a wide aspect ratio, '
u'and should be no wider than 600px, and no taller than 60px.'),
required=False,
constraint=is_valid_logo,
)
# XXX: placeholder attribute is not working
form.widget('amp_sticky_ad',
rows=15,
placeholder=AMP_STICKY_AD_PLACEHOLDER)
amp_sticky_ad = schema.Text(
title=_(u'AMP Sticky Ad'),
description=
_(u'Adds support for ad units that always take a fixed place in the viewport. '
u'Fill with the "amp-ad" element that will be used as a direct child of "amp-sticky-ad". '
u'See <a href="https://ampbyexample.com/components/amp-sticky-ad/">amp-sticky-ad</a> for examples on how to implement this feature.'
),
required=False,
default=u'',
constraint=is_xml,
)
form.widget('amp_analytics', rows=15)
amp_analytics = schema.Text(
title=_(u'AMP Analytics'),
description=
_(u'The "amp-analytics" elements that will be used to measure activity on AMP documents. '
u'See <a href="https://developers.google.com/analytics/devguides/collection/amp-analytics/">'
u'Adding Analytics to your AMP pages</a> for examples on how to implement this feature.'
),
required=False,
default=u'',
constraint=is_xml,
)
class AMPSettingsEditForm(controlpanel.RegistryEditForm):
"""Control panel edit form."""
schema = IAMPSettings
label = _(u'Accelerated Mobile Pages')
description = _(u'Settings for AMP integration.')