def __call__(
self,
fieldname=None,
direction='thumbnail',
height=None,
width=None,
scale=None,
**parameters
):
storage = Storage(self.context)
self.box = storage.read(fieldname, scale)
if self.box:
direction = 'down'
else:
registry = getUtility(IRegistry)
settings = registry.forInterface(ISettings)
if scale in settings.cropping_for:
direction = 'down'
return super(CroppingImageScalingFactory, self).__call__(
fieldname=fieldname,
direction=direction,
height=height,
width=width,
scale=scale,
**parameters
)
def _scale_info(self, fieldname, scale_id, target_size, true_size):
scale = dict()
scale['id'] = scale_id
scale['title'] = scale_id
# scale config
min_width, min_height = self._min_size(true_size, target_size)
# lookup saved crop info
storage = Storage(self.context)
current_box = storage.read(fieldname, scale_id)
if current_box is None:
current_box = self._initial_size(true_size, target_size)
scale['is_cropped'] = False
else:
scale['is_cropped'] = True
# images original dimensions
scale['true_width'] = true_size[0]
scale['true_height'] = true_size[1]
# images target dimensions
scale['target_width'] = target_size[0]
scale['target_height'] = target_size[1]
# current selected crop
scale['current'] = {
'x': current_box[0],
'y': current_box[1],
'w': current_box[2] - current_box[0],
'h': current_box[3] - current_box[1],
}
scale['aspect_ratio'] = '1.777778' # 16:9
if target_size[0] > 0 and target_size[1] > 0:
scale['aspect_ratio'] = '{0:.2f}'.format(
float(target_size[0]) / float(target_size[1])
)
scale['can_scale'] = (
target_size[0] <= true_size[0] and
target_size[1] <= true_size[1]
)
return scale
