def img(src, width=None, height=None, method=PROPORTIONAL, alt="", **attrs):
"""Renders an image tag."""
params = {
"alt": alt,
"attrs": attrs,
}
try:
thumbnail = default_thumbnail_cache.get_thumbnail(
src,
width = width,
height = height,
method = method,
)
except ThumbnailError:
asset = AdaptiveAsset(src)
params.update({
"url": asset.get_url(),
"width": width or "",
"height": height or "",
})
else:
params.update({
"url": thumbnail.url,
"width": thumbnail.width,
"height": thumbnail.height,
})
return params
def img(src, width=None, height=None, method=PROPORTIONAL, alt="", **attrs):
"""Renders an image tag."""
params = {
"alt": alt,
"attrs": attrs,
}
try:
thumbnail = default_thumbnail_cache.get_thumbnail(
src,
width=width,
height=height,
method=method,
)
except ThumbnailError:
asset = AdaptiveAsset(src)
params.update({
"url": asset.get_url(),
"width": width or "",
"height": height or "",
})
else:
params.update({
"url": thumbnail.url,
"width": thumbnail.width,
"height": thumbnail.height,
})
return params
def testImageCacheForSameSizeImageLeavesImageUnmodified(self):
asset, image_size = get_test_thumbnail_asset()
width, height = image_size
thumbnail = default_thumbnail_cache.get_thumbnail(asset, width, height, "resize")
self.assertEqual(thumbnail.width, width)
self.assertEqual(thumbnail.height, height)
# Make sure the assets are identical.
self.assertEqual(hashlib.sha1(default_storage.open(default_asset_cache.get_name(asset)).read()).hexdigest(), hashlib.sha1(default_storage.open(default_asset_cache.get_name(thumbnail._asset)).read()).hexdigest())
def testImageCacheThumbnailLarger(self):
asset, image_size = get_test_thumbnail_asset()
width, height = image_size
width *= 3
height *= 2
thumbnail = default_thumbnail_cache.get_thumbnail(asset, width, height, "proportional")
self.assertNotEqual(thumbnail.width, width)
self.assertEqual(thumbnail.height, height)
# Make sure the file contents are not identical.
self.assertEqual(hashlib.sha1(default_storage.open(default_asset_cache.get_name(asset)).read()).hexdigest(), hashlib.sha1(default_storage.open(default_asset_cache.get_name(thumbnail._asset)).read()).hexdigest())
def testImageCacheForSameSizeImageLeavesImageUnmodified(self):
asset, image_size = get_test_thumbnail_asset()
width, height = image_size
thumbnail = default_thumbnail_cache.get_thumbnail(
asset, width, height, "resize")
self.assertEqual(thumbnail.width, width)
self.assertEqual(thumbnail.height, height)
# Make sure the assets are identical.
self.assertEqual(
hashlib.sha1(
default_storage.open(
default_asset_cache.get_name(asset)).read()).hexdigest(),
hashlib.sha1(
default_storage.open(
default_asset_cache.get_name(
thumbnail._asset)).read()).hexdigest())
def testGetImgTag(self):
asset, image_size = get_test_thumbnail_asset()
width, height = image_size
width /= 2
height /= 2
thumbnail = default_thumbnail_cache.get_thumbnail(asset, width, height, "resize")
self.assertEqual(
Template("{% load assets %}{% get_img asset width=width height=height method='resize' as img %}{{img.url}}:{{img.width}}:{{img.height}}").render(Context({
"asset": asset,
"width": width,
"height": height,
})),
u'{src}:{width}:{height}'.format(
src = thumbnail.url,
width = thumbnail.width,
height = thumbnail.height,
),
)
def testImgTag(self):
asset, image_size = get_test_thumbnail_asset()
width, height = image_size
width /= 2
height /= 2
thumbnail = default_thumbnail_cache.get_thumbnail(asset, width, height, "resize")
self.assertEqual(
Template("{% load assets %}{% img asset width=width height=height method='resize' %}").render(Context({
"asset": asset,
"width": width,
"height": height,
})),
u'<img src="{src}" width={width} height={height} alt="">'.format(
src = thumbnail.url,
width = thumbnail.width,
height = thumbnail.height,
),
)
def testGetImgTag(self):
asset, image_size = get_test_thumbnail_asset()
width, height = image_size
width /= 2
height /= 2
thumbnail = default_thumbnail_cache.get_thumbnail(asset, width, height, "resize")
self.assertEqual(
Template("{% load assets %}{% get_img asset width=width height=height method='resize' as img %}{{img.url}}:{{img.width}}:{{img.height}}").render(Context({
"asset": asset,
"width": width,
"height": height,
})),
'{src}:{width}:{height}'.format(
src = thumbnail.url,
width = thumbnail.width,
height = thumbnail.height,
),
)
def testImgTag(self):
asset, image_size = get_test_thumbnail_asset()
width, height = image_size
width /= 2
height /= 2
thumbnail = default_thumbnail_cache.get_thumbnail(asset, width, height, "resize")
self.assertEqual(
Template("{% load assets %}{% img asset width=width height=height method='resize' %}").render(Context({
"asset": asset,
"width": width,
"height": height,
})),
'<img src="{src}" width={width} height={height} alt="">'.format(
src = thumbnail.url,
width = thumbnail.width,
height = thumbnail.height,
),
)
def testImageCacheThumbnailSmaller(self):
asset, image_size = get_test_thumbnail_asset()
width, height = image_size
width /= 3
height /= 2
thumbnail = default_thumbnail_cache.get_thumbnail(
asset, width, height, "proportional")
self.assertEqual(thumbnail.width, width)
self.assertNotEqual(thumbnail.height, height)
# Make sure the file contents are not identical.
self.assertNotEqual(
hashlib.sha1(
default_storage.open(
default_asset_cache.get_name(asset)).read()).hexdigest(),
hashlib.sha1(
default_storage.open(
default_asset_cache.get_name(
thumbnail._asset)).read()).hexdigest())
def testImageCacheResizeLarger(self):
asset, image_size = get_test_thumbnail_asset()
width, height = image_size
width *= 2
height *= 2
thumbnail = default_thumbnail_cache.get_thumbnail(
asset, width, height, "resize")
self.assertEqual(thumbnail.width, width)
self.assertEqual(thumbnail.height, height)
# Make sure the file contents are identical.
self.assertEqual(
hashlib.sha1(
default_storage.open(
default_asset_cache.get_name(asset)).read()).hexdigest(),
hashlib.sha1(
default_storage.open(
default_asset_cache.get_name(
thumbnail._asset)).read()).hexdigest())
def responsive_img(src, method=PROPORTIONAL, alt="", **attrs):
"""Renders an image tag."""
output = {
"sizes": [],
"alt": alt,
"attrs": attrs,
}
for size in settings.RESPONSIVE_IMAGES_SIZES:
params = {}
try:
thumbnail = default_thumbnail_cache.get_thumbnail(
src,
width=size['width'],
height=size['height'],
method=method,
)
except ThumbnailError:
asset = AdaptiveAsset(src)
params.update({
"url": asset.get_url(),
"width": size['width'] or "",
"height": size['height'] or "",
})
else:
params.update({
"url": thumbnail.url,
"width": thumbnail.width,
"height": thumbnail.height,
})
output['sizes'].append(params)
return output