def __hsl_op(op, color, h, s, l):
color = ColorValue(color)
c = color.value
h = None if h is None else NumberValue(h)
s = None if s is None else NumberValue(s)
l = None if l is None else NumberValue(l)
a = [
None if h is None else h.value / 360.0,
None if s is None else _apply_percentage(s),
None if l is None else _apply_percentage(l),
]
# Convert to HSL:
h, l, s = list(
colorsys.rgb_to_hls(c[0] / 255.0, c[1] / 255.0, c[2] / 255.0))
c = h, s, l
# Do the additions:
c = [
0.0
if c[i] < 0 else 1.0 if c[i] > 1 else op(c[i], a[i]) if op is not None
and a[i] is not None else a[i] if a[i] is not None else c[i]
for i in range(3)
]
# Validations:
c[0] = (c[0] * 360.0) % 360
r = 360.0, 1.0, 1.0
c = [0.0 if c[i] < 0 else r[i] if c[i] > r[i] else c[i] for i in range(3)]
# Convert back to RGB:
c = colorsys.hls_to_rgb(c[0] / 360.0, 0.99999999 if c[2] == 1 else c[2],
0.99999999 if c[1] == 1 else c[1])
color.value = (c[0] * 255.0, c[1] * 255.0, c[2] * 255.0, color.value[3])
return color
def dash_compass_slice(lst, start_index, end_index=None):
start_index = NumberValue(start_index).value
end_index = NumberValue(end_index).value if end_index is not None else None
ret = {}
lst = List(lst)
if end_index:
# This function has an inclusive end, but Python slicing is exclusive
end_index += 1
ret = lst.value[start_index:end_index]
return List(ret, use_comma=lst.use_comma)
def __grad_position(index, default, radial, color_stops):
try:
stops = NumberValue(color_stops[index][0])
if radial and stops.unit != 'px' and (index == 0 or index == -1 or
index == len(color_stops) - 1):
log.warn(
"Webkit only supports pixels for the start and end stops for radial gradients. Got %s",
stops)
except IndexError:
stops = NumberValue(default)
return stops
def grad_point(*p):
pos = set()
hrz = vrt = NumberValue(0.5, '%')
for _p in p:
pos.update(StringValue(_p).value.split())
if 'left' in pos:
hrz = NumberValue(0, '%')
elif 'right' in pos:
hrz = NumberValue(1, '%')
if 'top' in pos:
vrt = NumberValue(0, '%')
elif 'bottom' in pos:
vrt = NumberValue(1, '%')
return List([v for v in (hrz, vrt) if v is not None])
def image_height(image):
"""
Returns the height of the image found at the path supplied by `image`
relative to your project's images directory.
"""
if not Image:
raise Exception("Images manipulation require PIL")
filepath = StringValue(image).value
path = None
try:
height = _image_size_cache[filepath][1]
except KeyError:
height = 0
if callable(config.STATIC_ROOT):
try:
_file, _storage = list(config.STATIC_ROOT(filepath))[0]
path = _storage.open(_file)
except:
pass
else:
_path = os.path.join(config.STATIC_ROOT, filepath.strip('/'))
if os.path.exists(_path):
path = open(_path, 'rb')
if path:
image = Image.open(path)
size = image.size
height = size[1]
_image_size_cache[filepath] = size
return NumberValue(height, 'px')
def _color_type(color, a, type):
color = ColorValue(color).value
a = NumberValue(a).value if a is not None else color[3]
col = list(color[:3])
col += [0.0 if a < 0 else 1.0 if a > 1 else a]
col += [type]
return ColorValue(col)
def enumerate_(prefix, frm, through, separator='-'):
separator = StringValue(separator).value
try:
frm = int(getattr(frm, 'value', frm))
except ValueError:
frm = 1
try:
through = int(getattr(through, 'value', through))
except ValueError:
through = frm
if frm > through:
frm, through = through, frm
rev = reversed
else:
rev = lambda x: x
ret = []
for i in rev(range(frm, through + 1)):
if prefix.value:
ret.append(
StringValue(prefix.value + separator + str(i), quotes=None))
else:
ret.append(NumberValue(i))
return List(ret, use_comma=True)
def background_noise(density=None, opacity=None, size=None, monochrome=False, intensity=None, color=None, background=None, inline=False):
if not Image:
raise Exception("Images manipulation require PIL")
density = [NumberValue(v).value for v in List.from_maybe(density)]
intensity = [NumberValue(v).value for v in List.from_maybe(intensity)]
color = [ColorValue(v).value for v in List.from_maybe(color) if v]
opacity = [NumberValue(v).value for v in List.from_maybe(opacity)]
size = int(NumberValue(size).value) if size else 0
if size < 1 or size > 512:
size = 200
monochrome = bool(monochrome)
background = ColorValue(background).value if background else None
new_image = Image.new(
mode='RGBA',
size=(size, size)
)
pixdata = new_image.load()
_image_noise(pixdata, size, density, intensity, color, opacity, monochrome)
if not inline:
key = (size, density, intensity, color, opacity, monochrome)
asset_file = 'noise-%s%sx%s' % ('mono-' if monochrome else '', size, size)
# asset_file += '-[%s][%s]' % ('-'.join(to_str(s).replace('.', '_') for s in density or []), '-'.join(to_str(s).replace('.', '_') for s in opacity or []))
asset_file += '-' + base64.urlsafe_b64encode(hashlib.md5(repr(key)).digest()).rstrip('=').replace('-', '_')
asset_file += '.png'
asset_path = os.path.join(config.ASSETS_ROOT or os.path.join(config.STATIC_ROOT, 'assets'), asset_file)
try:
new_image.save(asset_path)
except IOError:
log.exception("Error while saving image")
inline = True # Retry inline version
url = '%s%s' % (config.ASSETS_URL, asset_file)
if inline:
output = six.BytesIO()
new_image.save(output, format='PNG')
contents = output.getvalue()
output.close()
url = 'data:image/png;base64,' + base64.b64encode(contents)
inline = 'url("%s")' % escape(url)
return StringValue(inline)
def percentage(value):
if not isinstance(value, NumberValue):
raise TypeError("Expected number, got %r" % (value, ))
if not value.is_unitless:
raise TypeError("Expected unitless number, got %r" % (value, ))
return value * NumberValue(100, unit='%')
def __rgba_op(op, color, r, g, b, a):
color = ColorValue(color)
c = color.value
a = [
None if r is None else NumberValue(r).value,
None if g is None else NumberValue(g).value,
None if b is None else NumberValue(b).value,
None if a is None else NumberValue(a).value,
]
# Do the additions:
c = [
op(c[i], a[i]) if op is not None and a[i] is not None else
a[i] if a[i] is not None else c[i] for i in range(4)
]
# Validations:
r = 255.0, 255.0, 255.0, 1.0
c = [0.0 if c[i] < 0 else r[i] if c[i] > r[i] else c[i] for i in range(4)]
color.value = tuple(c)
return color
def image_color(color, width=1, height=1):
if not Image:
raise Exception("Images manipulation require PIL")
c = ColorValue(color).value
w = int(NumberValue(width).value)
h = int(NumberValue(height).value)
if w <= 0 or h <= 0:
raise ValueError
new_image = Image.new(
mode='RGB' if c[3] == 1 else 'RGBA',
size=(w, h),
color=(c[0], c[1], c[2], int(c[3] * 255.0))
)
output = six.BytesIO()
new_image.save(output, format='PNG')
contents = output.getvalue()
output.close()
mime_type = 'image/png'
url = 'data:' + mime_type + ';base64,' + base64.b64encode(contents)
inline = 'url("%s")' % escape(url)
return StringValue(inline)
def atom(self):
_token_ = self._peek(self.u_expr_chks)
if _token_ == 'LPAR':
LPAR = self._scan('LPAR')
expr_lst = self.expr_lst()
RPAR = self._scan('RPAR')
return Parentheses(expr_lst)
elif _token_ == 'ID':
ID = self._scan('ID')
return Literal(parse_bareword(ID))
elif _token_ == 'BANG_IMPORTANT':
BANG_IMPORTANT = self._scan('BANG_IMPORTANT')
return Literal(String(BANG_IMPORTANT, quotes=None))
elif _token_ == 'FNCT':
FNCT = self._scan('FNCT')
v = ArgspecLiteral([])
LPAR = self._scan('LPAR')
if self._peek(self.atom_rsts) != 'RPAR':
argspec = self.argspec()
v = argspec
RPAR = self._scan('RPAR')
return CallOp(FNCT, v)
elif _token_ == 'NUM':
NUM = self._scan('NUM')
if self._peek(self.atom_rsts_) == 'UNITS':
UNITS = self._scan('UNITS')
return Literal(NumberValue(float(NUM), unit=UNITS.lower()))
return Literal(NumberValue(float(NUM)))
elif _token_ == 'STR':
STR = self._scan('STR')
return Literal(String(STR[1:-1], quotes="'"))
elif _token_ == 'QSTR':
QSTR = self._scan('QSTR')
return Literal(String(QSTR[1:-1], quotes='"'))
elif _token_ == 'COLOR':
COLOR = self._scan('COLOR')
return Literal(ColorValue(ParserValue(COLOR)))
else: # == 'VAR'
VAR = self._scan('VAR')
return Variable(VAR)
def sprite_position(map, sprite, offset_x=None, offset_y=None):
"""
Returns the position for the original image in the sprite.
This is suitable for use as a value to background-position.
"""
map = StringValue(map).value
sprite_name = StringValue(sprite).value
sprite_map = sprite_maps.get(map)
sprite = sprite_map and sprite_map.get(sprite_name)
if not sprite_map:
log.error("No sprite map found: %s", map, extra={'stack': True})
elif not sprite:
log.error("No sprite found: %s in %s", sprite_name, sprite_map['*n*'], extra={'stack': True})
if sprite:
x = None
if offset_x is not None and not isinstance(offset_x, NumberValue):
x = offset_x
if x not in ('left', 'right', 'center'):
if x:
offset_x = None
x = NumberValue(offset_x or 0, 'px')
u = x.unit
x = x.value
if not x or (x <= -1 or x >= 1) and u != '%':
x -= sprite[2]
y = None
if offset_y is not None and not isinstance(offset_y, NumberValue):
y = offset_y
if y not in ('top', 'bottom', 'center'):
if y:
offset_y = None
y = NumberValue(offset_y or 0, 'px')
u = y.unit
y = y.value
if not y or (y <= -1 or y >= 1) and u != '%':
y -= sprite[3]
pos = '%s %s' % (x, y)
return StringValue(pos)
return StringValue('0 0')
def test_alpha_opacity(calc):
assert calc('alpha(black)') == NumberValue(1.)
assert calc('alpha(rgba(black, 0.5))') == NumberValue(0.5)
assert calc('alpha(rgba(black, 0))') == NumberValue(0.)
# opacity is a synonym
assert calc('opacity(black)') == NumberValue(1.)
assert calc('opacity(rgba(black, 0.5))') == NumberValue(0.5)
assert calc('opacity(rgba(black, 0))') == NumberValue(0.)
def sprite(map, sprite, offset_x=None, offset_y=None):
"""
Returns the image and background position for use in a single shorthand
property
"""
map = StringValue(map).value
sprite_name = StringValue(sprite).value
sprite_map = sprite_maps.get(map)
sprite = sprite_map and sprite_map.get(sprite_name)
if not sprite_map:
log.error("No sprite map found: %s", map, extra={'stack': True})
elif not sprite:
log.error("No sprite found: %s in %s", sprite_name, sprite_map['*n*'], extra={'stack': True})
if sprite:
url = '%s%s?_=%s' % (config.ASSETS_URL, sprite_map['*f*'], sprite_map['*t*'])
x = NumberValue(offset_x or 0, 'px')
y = NumberValue(offset_y or 0, 'px')
if not x or (x <= -1 or x >= 1) and x.unit != '%':
x -= sprite[2]
if not y or (y <= -1 or y >= 1) and y.unit != '%':
y -= sprite[3]
pos = "url(%s) %s %s" % (escape(url), x, y)
return StringValue(pos)
return StringValue('0 0')
def _position(opposite, positions):
if positions is None:
positions = DEFAULT_POSITION
else:
positions = List.from_maybe(positions)
ret = []
for pos in positions:
if isinstance(pos, (StringValue, six.string_types)):
pos_value = getattr(pos, 'value', pos)
if pos_value in OPPOSITE_POSITIONS:
if opposite:
ret.append(OPPOSITE_POSITIONS[pos_value])
else:
ret.append(pos)
continue
elif isinstance(pos, NumberValue):
if pos.unit == '%':
if opposite:
ret.append(NumberValue(100 - pos.value, '%'))
else:
ret.append(pos)
continue
elif pos.unit == 'deg':
# TODO support other angle types?
if opposite:
ret.append(NumberValue((pos.value + 180) % 360, 'deg'))
else:
ret.append(pos)
continue
log.warn("Can't find opposite for position %r" % (pos, ))
ret.append(pos)
return List(ret, use_comma=False).maybe()
def nth(lst, n):
"""
Return the Nth item in the string
"""
n = NumberValue(n).value
lst = List(lst).value
try:
n = int(float(n)) - 1
n = n % len(lst)
except:
if n.lower() == 'first':
n = 0
elif n.lower() == 'last':
n = -1
try:
ret = lst[n]
except KeyError:
lst = [v for k, v in sorted(lst.items()) if isinstance(k, int)]
try:
ret = lst[n]
except:
ret = ''
return ret.__class__(ret)
def test_lightness(calc):
assert calc('lightness(yellow)') == NumberValue(50, unit='%')
def pi():
return NumberValue(math.pi)
def test_saturation(calc):
assert calc('saturation(yellow)') == NumberValue(100, unit='%')
def lightness(color):
c = ColorValue(color).value
h, l, s = colorsys.rgb_to_hls(c[0] / 255.0, c[1] / 255.0, c[2] / 255.0)
return NumberValue(l * 100, unit='%')
def test_blue(calc):
assert calc('blue(orange)') == NumberValue(0)
def test_hue(calc):
assert calc('hue(yellow)') == NumberValue(60, unit='deg')
def test_green(calc):
assert calc('green(orange)') == NumberValue(165)
def test_red(calc):
assert calc('red(orange)') == NumberValue(255)
def index(lst, val):
for i in xrange(len(lst)):
if lst.value[i] == val:
return NumberValue(i + 1)
return BooleanValue(False)
def _length(*lst):
if len(lst) == 1 and isinstance(lst[0], (list, tuple, List)):
lst = lst[0]
return NumberValue(len(lst))
def rgb(r, g, b, type='rgb'):
return rgba(r, g, b, NumberValue(1.0), type)
def sprite_map(g, **kwargs):
"""
Generates a sprite map from the files matching the glob pattern.
Uses the keyword-style arguments passed in to control the placement.
$direction - Sprite map layout. Can be `vertical` (default), `horizontal`, `diagonal` or `smart`.
$position - For `horizontal` and `vertical` directions, the position of the sprite. (defaults to `0`)
$<sprite>-position - Position of a given sprite.
$padding, $spacing - Adds paddings to sprites (top, right, bottom, left). (defaults to `0, 0, 0, 0`)
$<sprite>-padding, $<sprite>-spacing - Padding for a given sprite.
$dst-color - Together with `$src-color`, forms a map of source colors to be converted to destiny colors (same index of `$src-color` changed to `$dst-color`).
$<sprite>-dst-color - Destiny colors for a given sprite. (defaults to `$dst-color`)
$src-color - Selects source colors to be converted to the corresponding destiny colors. (defaults to `black`)
$<sprite>-dst-color - Source colors for a given sprite. (defaults to `$src-color`)
$collapse - Collapses every image in the sprite map to a fixed size (`x` and `y`).
$collapse-x - Collapses a size for `x`.
$collapse-y - Collapses a size for `y`.
"""
if not Image:
raise Exception("Images manipulation require PIL")
now_time = time.time()
g = StringValue(g).value
if g in sprite_maps:
sprite_maps[glob]['*'] = now_time
elif '..' not in g: # Protect against going to prohibited places...
if callable(config.STATIC_ROOT):
glob_path = g
rfiles = files = sorted(config.STATIC_ROOT(g))
else:
glob_path = os.path.join(config.STATIC_ROOT, g)
files = glob.glob(glob_path)
files = sorted((f, None) for f in files)
rfiles = [(rf[len(config.STATIC_ROOT):], s) for rf, s in files]
if not files:
log.error("Nothing found at '%s'", glob_path)
return StringValue(None)
map_name = os.path.normpath(os.path.dirname(g)).replace('\\', '_').replace('/', '_')
key = list(zip(*files)[0]) + [repr(kwargs), config.ASSETS_URL]
key = map_name + '-' + base64.urlsafe_b64encode(hashlib.md5(repr(key)).digest()).rstrip('=').replace('-', '_')
asset_file = key + '.png'
ASSETS_ROOT = config.ASSETS_ROOT or os.path.join(config.STATIC_ROOT, 'assets')
asset_path = os.path.join(ASSETS_ROOT, asset_file)
cache_path = os.path.join(config.CACHE_ROOT or ASSETS_ROOT, asset_file + '.cache')
sprite_map = None
if os.path.exists(asset_path):
try:
save_time, asset, sprite_map, sizes = pickle.load(open(cache_path))
sprite_maps[asset] = sprite_map
except:
pass
if sprite_map:
for file_, storage in files:
if storage is not None:
d_obj = storage.modified_time(file_)
_time = time.mktime(d_obj.timetuple())
else:
_time = os.path.getmtime(file_)
if save_time < _time:
if _time > now_time:
log.warning("File '%s' has a date in the future (cache ignored)" % file_)
sprite_map = None # Invalidate cached sprite map
break
if sprite_map is None:
direction = StringValue(kwargs.get('direction', config.SPRTE_MAP_DIRECTION)).value
repeat = StringValue(kwargs.get('repeat', 'no-repeat')).value
collapse = kwargs.get('collapse') or 0
if isinstance(collapse, List):
collapse_x = int(NumberValue(collapse[0]).value)
collapse_y = int(NumberValue(collapse[-1]).value)
else:
collapse_x = collapse_y = int(NumberValue(collapse).value)
if 'collapse_x' in kwargs:
collapse_x = int(NumberValue(kwargs['collapse_x']).value)
if 'collapse_y' in kwargs:
collapse_y = int(NumberValue(kwargs['collapse_y']).value)
position = kwargs.get('position', 0)
position = NumberValue(position)
if position.unit != '%' and position.value > 1:
position = position.value / 100.0
else:
position = position.value
if position < 0:
position = 0.0
elif position > 1:
position = 1.0
padding = kwargs.get('padding', kwargs.get('spacing', 0))
padding = [int(NumberValue(v).value) for v in List.from_maybe(padding)]
padding = (padding * 4)[:4]
dst_colors = kwargs.get('dst_color')
dst_colors = [list(ColorValue(v).value[:3]) for v in List.from_maybe(dst_colors) if v]
src_colors = kwargs.get('src_color')
src_colors = [tuple(ColorValue(v).value[:3]) if v else (0, 0, 0) for v in List.from_maybe(src_colors)]
len_colors = max(len(dst_colors), len(src_colors))
dst_colors = (dst_colors * len_colors)[:len_colors]
src_colors = (src_colors * len_colors)[:len_colors]
def images(f=lambda x: x):
for file_, storage in f(files):
if storage is not None:
_file = storage.open(file_)
else:
_file = file_
_image = Image.open(_file)
yield _image
names = tuple(os.path.splitext(os.path.basename(file_))[0] for file_, storage in files)
has_dst_colors = False
all_dst_colors = []
all_src_colors = []
all_positions = []
all_paddings = []
for name in names:
name = name.replace('-', '_')
_position = kwargs.get(name + '_position')
if _position is None:
_position = position
else:
_position = NumberValue(_position)
if _position.unit != '%' and _position.value > 1:
_position = _position.value / 100.0
else:
_position = _position.value
if _position < 0:
_position = 0.0
elif _position > 1:
_position = 1.0
all_positions.append(_position)
_padding = kwargs.get(name + '_padding', kwargs.get(name + '_spacing'))
if _padding is None:
_padding = padding
else:
_padding = [int(NumberValue(v).value) for v in List.from_maybe(_padding)]
_padding = (_padding * 4)[:4]
all_paddings.append(_padding)
_dst_colors = kwargs.get(name + '_dst_color')
if _dst_colors is None:
_dst_colors = dst_colors
if dst_colors:
has_dst_colors = True
else:
has_dst_colors = True
_dst_colors = [list(ColorValue(v).value[:3]) for v in List.from_maybe(_dst_colors) if v]
_src_colors = kwargs.get(name + '_src_color')
if _src_colors is None:
_src_colors = src_colors
else:
_src_colors = [tuple(ColorValue(v).value[:3]) if v else (0, 0, 0) for v in List.from_maybe(_src_colors)]
_len_colors = max(len(_dst_colors), len(_src_colors))
_dst_colors = (_dst_colors * _len_colors)[:_len_colors]
_src_colors = (_src_colors * _len_colors)[:_len_colors]
all_dst_colors.append(_dst_colors)
all_src_colors.append(_src_colors)
sizes = tuple((collapse_x or i.size[0], collapse_y or i.size[1]) for i in images())
if direction == 'horizontal':
layout = HorizontalSpritesLayout(sizes, all_paddings, position=all_positions)
elif direction == 'vertical':
layout = VerticalSpritesLayout(sizes, all_paddings, position=all_positions)
elif direction == 'diagonal':
layout = DiagonalSpritesLayout(sizes, all_paddings)
elif direction == 'smart':
layout = PackedSpritesLayout(sizes, all_paddings)
else:
raise Exception("Invalid direction %r" % (direction,))
layout_positions = list(layout)
new_image = Image.new(
mode='RGBA',
size=(layout.width, layout.height),
color=(0, 0, 0, 0)
)
useless_dst_color = has_dst_colors
offsets_x = []
offsets_y = []
for i, image in enumerate(images()):
x, y, width, height, cssx, cssy, cssw, cssh = layout_positions[i]
iwidth, iheight = image.size
if has_dst_colors:
pixdata = image.load()
for _y in xrange(iheight):
for _x in xrange(iwidth):
pixel = pixdata[_x, _y]
a = pixel[3] if len(pixel) == 4 else 255
if a:
rgb = pixel[:3]
for j, dst_color in enumerate(all_dst_colors[i]):
if rgb == all_src_colors[i][j]:
new_color = tuple([int(c) for c in dst_color] + [a])
if pixel != new_color:
pixdata[_x, _y] = new_color
useless_dst_color = False
break
if iwidth != width or iheight != height:
cy = 0
while cy < iheight:
cx = 0
while cx < iwidth:
new_image = alpha_composite(new_image, image, (x, y), (cx, cy, cx + width, cy + height))
cx += width
cy += height
else:
new_image.paste(image, (x, y))
offsets_x.append(cssx)
offsets_y.append(cssy)
if useless_dst_color:
log.warning("Useless use of $dst-color in sprite map for files at '%s' (never used for)" % glob_path)
try:
new_image.save(asset_path)
except IOError:
log.exception("Error while saving image")
filetime = int(now_time)
url = '%s%s?_=%s' % (config.ASSETS_URL, asset_file, filetime)
asset = 'url("%s") %s' % (escape(url), repeat)
# Add the new object:
sprite_map = dict(zip(names, zip(sizes, rfiles, offsets_x, offsets_y)))
sprite_map['*'] = now_time
sprite_map['*f*'] = asset_file
sprite_map['*k*'] = key
sprite_map['*n*'] = map_name
sprite_map['*t*'] = filetime
cache_tmp = tempfile.NamedTemporaryFile(delete=False, dir=ASSETS_ROOT)
pickle.dump((now_time, asset, sprite_map, zip(files, sizes)), cache_tmp)
cache_tmp.close()
os.rename(cache_tmp.name, cache_path)
# Use the sorted list to remove older elements (keep only 500 objects):
if len(sprite_maps) > MAX_SPRITE_MAPS:
for a in sorted(sprite_maps, key=lambda a: sprite_maps[a]['*'], reverse=True)[KEEP_SPRITE_MAPS:]:
del sprite_maps[a]
log.warning("Exceeded maximum number of sprite maps (%s)" % MAX_SPRITE_MAPS)
sprite_maps[asset] = sprite_map
for file_, size in sizes:
_image_size_cache[file_] = size
ret = StringValue(asset)
return ret
def _image_url(path,
only_path=False,
cache_buster=True,
dst_color=None,
src_color=None,
inline=False,
mime_type=None,
spacing=None,
collapse_x=None,
collapse_y=None):
"""
src_color - a list of or a single color to be replaced by each corresponding dst_color colors
spacing - spaces to be added to the image
collapse_x, collapse_y - collapsable (layered) image of the given size (x, y)
"""
if inline or dst_color or spacing:
if not Image:
raise Exception("Images manipulation require PIL")
filepath = StringValue(path).value
mime_type = inline and (StringValue(mime_type).value
or mimetypes.guess_type(filepath)[0])
path = None
if callable(config.STATIC_ROOT):
try:
_file, _storage = list(config.STATIC_ROOT(filepath))[0]
d_obj = _storage.modified_time(_file)
filetime = int(time.mktime(d_obj.timetuple()))
if inline or dst_color or spacing:
path = _storage.open(_file)
except:
filetime = 'NA'
else:
_path = os.path.join(config.STATIC_ROOT, filepath.strip('/'))
if os.path.exists(_path):
filetime = int(os.path.getmtime(_path))
if inline or dst_color or spacing:
path = open(_path, 'rb')
else:
filetime = 'NA'
BASE_URL = config.STATIC_URL
if path:
dst_colors = [
list(ColorValue(v).value[:3]) for v in List.from_maybe(dst_color)
if v
]
src_colors = src_color
src_colors = [
tuple(ColorValue(v).value[:3]) if v else (0, 0, 0)
for v in List.from_maybe(src_color)
]
len_colors = max(len(dst_colors), len(src_colors))
dst_colors = (dst_colors * len_colors)[:len_colors]
src_colors = (src_colors * len_colors)[:len_colors]
spacing = [
int(NumberValue(v).value) if v else 0
for v in List.from_maybe(spacing)
]
spacing = (spacing * 4)[:4]
file_name, file_ext = os.path.splitext(
os.path.normpath(filepath).replace('\\', '_').replace('/', '_'))
key = (filetime, src_color, dst_color, spacing)
key = file_name + '-' + base64.urlsafe_b64encode(
hashlib.md5(repr(key)).digest()).rstrip('=').replace('-', '_')
asset_file = key + file_ext
ASSETS_ROOT = config.ASSETS_ROOT or os.path.join(
config.STATIC_ROOT, 'assets')
asset_path = os.path.join(ASSETS_ROOT, asset_file)
if os.path.exists(asset_path):
filepath = asset_file
BASE_URL = config.ASSETS_URL
if inline:
path = open(asset_path, 'rb')
url = 'data:' + mime_type + ';base64,' + base64.b64encode(
path.read())
else:
url = '%s%s' % (BASE_URL, filepath)
if cache_buster:
filetime = int(os.path.getmtime(asset_path))
url = add_cache_buster(url, filetime)
else:
image = Image.open(path)
width, height = collapse_x or image.size[
0], collapse_y or image.size[1]
new_image = Image.new(mode='RGBA',
size=(width + spacing[1] + spacing[3],
height + spacing[0] + spacing[2]),
color=(0, 0, 0, 0))
for i, dst_color in enumerate(dst_colors):
src_color = src_colors[i]
pixdata = image.load()
for _y in xrange(image.size[1]):
for _x in xrange(image.size[0]):
pixel = pixdata[_x, _y]
if pixel[:3] == src_color:
pixdata[_x, _y] = tuple(
[int(c) for c in dst_color] +
[pixel[3] if len(pixel) == 4 else 255])
iwidth, iheight = image.size
if iwidth != width or iheight != height:
cy = 0
while cy < iheight:
cx = 0
while cx < iwidth:
cropped_image = image.crop(
(cx, cy, cx + width, cy + height))
new_image.paste(cropped_image,
(int(spacing[3]), int(spacing[0])),
cropped_image)
cx += width
cy += height
else:
new_image.paste(image, (int(spacing[3]), int(spacing[0])))
if not inline:
try:
new_image.save(asset_path)
filepath = asset_file
BASE_URL = config.ASSETS_URL
if cache_buster:
filetime = int(os.path.getmtime(asset_path))
except IOError:
log.exception("Error while saving image")
inline = True # Retry inline version
url = '%s%s' % (config.ASSETS_URL, asset_file)
if cache_buster:
url = add_cache_buster(url, filetime)
if inline:
output = six.BytesIO()
new_image.save(output, format='PNG')
contents = output.getvalue()
output.close()
url = 'data:' + mime_type + ';base64,' + base64.b64encode(
contents)
else:
url = '%s%s' % (BASE_URL, filepath)
if cache_buster:
url = add_cache_buster(url, filetime)
if not only_path:
url = 'url("%s")' % escape(url)
return StringValue(url)
