def retrieveScale(self, instance, scale):
""" retrieve a scaled version of the image """
field = self.context
if scale is None:
blob = field.getUnwrapped(instance)
data = dict(
id=field.getName(), blob=blob.getBlob(), content_type=blob.getContentType(), filename=blob.getFilename()
)
else:
fields = getattr(aq_base(instance), blobScalesAttr, {})
scales = fields.get(field.getName(), {})
data = scales.get(scale)
if data is not None:
blob = openBlob(data["blob"])
# `updata_data` & friends (from `OFS`) should support file
# objects, so we could use something like:
# ImageScale(..., data=blob.getIterator(), ...)
# but it uses `len(data)`, so we'll stick with a string for now
image = ImageScale(
data["id"],
data=blob.read(),
blob=data["blob"],
filename=data["filename"],
content_type=data["content_type"],
)
blob.close()
return image.__of__(instance)
return None
def storeScale(self, instance, scale, **data):
""" store a scaled version of the image """
image = ImageScale(**data)
field = self.context
field.getStorage(instance).set(
image.getId(), instance, image, mimetype=image.content_type, filename=image.filename
)
def storeScale(self, instance, scale, **data):
""" store a scaled version of the image """
image = ImageScale(**data)
field = self.context
field.getStorage(instance).set(image.getId(),
instance,
image,
mimetype=image.content_type,
filename=image.filename)
def make(self, info):
""" instantiate an object implementing `IImageScale` """
mimetype = info['mimetype']
info['content_type'] = mimetype
info['filename'] = self.context.getFilename()
scale = ImageScale(info['uid'], **info)
scale.size = len(scale.data)
url = self.context.absolute_url()
extension = mimetype.split('/')[-1]
scale.url = '%s/@@images/%s.%s' % (url, info['uid'], extension)
return scale
def make(self, info):
""" instantiate an object implementing `IImageScale` """
mimetype = info["mimetype"]
info["content_type"] = mimetype
info["filename"] = self.context.getFilename()
scale = ImageScale(info["uid"], **info)
scale.size = len(scale.data)
url = self.context.absolute_url()
extension = mimetype.split("/")[-1]
scale.url = "%s/@@images/%s.%s" % (url, info["uid"], extension)
return scale
def make(self, info):
""" instantiate an object implementing `IImageScale` """
mimetype = info['mimetype']
info['content_type'] = mimetype
info['filename'] = self.context.getFilename()
scale = ImageScale(info['uid'], **info)
scale.size = len(scale.data)
url = self.context.absolute_url()
extension = mimetype.split('/')[-1]
scale.url = '%s/@@images/%s.%s' % (url, info['uid'], extension)
return scale