Use offset_linkid instead of offset to scan >1000 entities.
this is a first-cut. It works in all the ways I could make earlier
versions fail. It passes link_id as URL parameters. It also has a new
class LinkCreator which makes the main body of getListContents even easier
to write.
I wasn't sure if link_id's could have non alphanumeric characters; if so, they
need to be URL encoded/decoded.
I also need to go and remove any mention of raw offsets now, because we don't
use them.
I believe I've talked about this approach with a few of you and it sounded
reasonable. Feel free to roll-back/fix/amend/comment-for-me-to-fix. This is
my first big-logic-change to Melange.
Patch by: Dan Bentley
"""
Utility functions for handling images.
Requires PIL, as you might imagine.
"""
from django.core.files import File
class ImageFile(File):
"""
A mixin for use alongside django.core.files.base.File, which provides
additional features for dealing with images.
"""
def _get_width(self):
return self._get_image_dimensions()[0]
width = property(_get_width)
def _get_height(self):
return self._get_image_dimensions()[1]
height = property(_get_height)
def _get_image_dimensions(self):
if not hasattr(self, '_dimensions_cache'):
self._dimensions_cache = get_image_dimensions(self)
return self._dimensions_cache
def get_image_dimensions(file_or_path):
"""Returns the (width, height) of an image, given an open file or a path."""
from PIL import ImageFile as PILImageFile
p = PILImageFile.Parser()
if hasattr(file_or_path, 'read'):
file = file_or_path
else:
file = open(file_or_path, 'rb')
while 1:
data = file.read(1024)
if not data:
break
p.feed(data)
if p.image:
return p.image.size
return None