def __init__(self, content):
self.content = content
self.attrs = {}
for declaration in parse_declaration_list(content,
skip_comments=True,
skip_whitespace=True):
if isinstance(declaration, ast.AtRule):
if declaration.at_keyword == 'bottom-right':
at_dec = Declarations(declaration.content)
self.attrs['page_bottom_right_content'] = at_dec.attrs[
'content']
else:
raise NotImplementedError
elif declaration.name == 'content':
self.attrs[declaration.name.replace(
'-', '_')] = parse_content_value(declaration.value)
else:
attr = declaration.name.replace('-', '_')
value_parts = parse_value_parts(declaration.value)
if declaration.name in ('color', 'background-color'):
self.attrs[attr] = color3.parse_color(value_parts[0])
elif declaration.name in ('margin', 'padding'):
apply_box_values(self.attrs, declaration.name + '_{}',
list(map(convert, value_parts)))
elif declaration.name == 'border-color':
apply_box_values(
self.attrs, 'border_{}_color',
list(map(color3.parse_color, value_parts)))
elif declaration.name == 'border-width':
apply_box_values(self.attrs, 'border_{}_width',
list(map(convert, value_parts)))
elif declaration.name == 'border-collapse':
self.attrs[attr] = getattr(BorderCollapse,
value_parts[0].value)
elif declaration.name == 'border-style':
apply_box_values(
self.attrs, 'border_{}_style',
[getattr(BorderStyle, v.value) for v in value_parts])
elif declaration.name == 'border-spacing':
if len(value_parts) == 1:
self.attrs['border_spacing_horizontal'] = value_parts[
0].value
self.attrs['border_spacing_vertical'] = value_parts[
0].value
else:
(self.attrs['border_spacing_horizontal'],
self.attrs['border_spacing_vertical']) = value_parts
elif declaration.name.startswith('border-'):
if declaration.name.endswith('-style'):
self.attrs[attr] = getattr(BorderStyle,
value_parts[0].value)
elif declaration.name.endswith('-color'):
self.attrs[attr] = color3.parse_color(value_parts[0])
elif declaration.name.endswith('-width'):
self.attrs[attr] = convert(value_parts[0])
elif isinstance(value_parts[0], ast.DimensionToken):
self.attrs[attr] = convert(value_parts[0])
else:
self.attrs[attr] = value_parts[0].value
def parse_color_stop(tokens):
if len(tokens) == 1:
color = parse_color(tokens[0])
if color is not None:
return color, None
elif len(tokens) == 2:
color = parse_color(tokens[0])
position = get_length(tokens[1], negative=True, percentage=True)
if color is not None and position is not None:
return color, position
raise InvalidValues
def parse_color_stop(tokens):
if len(tokens) == 1:
color = parse_color(tokens[0])
if color is not None:
return color, None
elif len(tokens) == 2:
color = parse_color(tokens[0])
position = get_length(tokens[1], negative=True, percentage=True)
if color is not None and position is not None:
return color, position
raise InvalidValues
def parse_color_stop(tokens):
if len(tokens) == 1:
color = parse_color(tokens[0])
if color == 'currentColor':
# TODO: return the current color instead
return parse_color('black'), None
if color is not None:
return color, None
elif len(tokens) == 2:
color = parse_color(tokens[0])
position = get_length(tokens[1], negative=True, percentage=True)
if color is not None and position is not None:
return color, position
raise InvalidValues
def color(token):
"""``*-color`` and ``color`` properties validation."""
result = parse_color(token)
if result == 'currentColor':
return 'inherit'
else:
return result
def color(token):
"""``*-color`` and ``color`` properties validation."""
result = parse_color(token)
if result == 'currentColor':
return 'inherit'
else:
return result
def grey_from_style_frag(frag):
color = color3.parse_color(frag)
if color is None:
return frag
else:
grey = int(255 * color.red * 0.3 + 255 * color.green * 0.59 + 255 * color.blue * 0.11)
return "rgb({g}, {g}, {g})".format(g=grey)
def test_color3_keywords():
for css, expected in load_json('color3_keywords.json'):
result = parse_color(css)
if result is not None:
r, g, b, a = result
result = [r * 255, g * 255, b * 255, a]
assert result == expected
def expand_text_decoration(base_url, name, tokens):
"""Expand the ``text-decoration`` shorthand property."""
text_decoration_line = set()
text_decoration_color = None
text_decoration_style = None
for token in tokens:
keyword = get_keyword(token)
if keyword in ('none', 'underline', 'overline', 'line-through',
'blink'):
text_decoration_line.add(keyword)
elif keyword in ('solid', 'double', 'dotted', 'dashed', 'wavy'):
if text_decoration_style is not None:
raise InvalidValues
else:
text_decoration_style = keyword
else:
color = parse_color(token)
if color is None:
raise InvalidValues
elif text_decoration_color is not None:
raise InvalidValues
else:
text_decoration_color = color
if 'none' in text_decoration_line:
if len(text_decoration_line) != 1:
raise InvalidValues
text_decoration_line = 'none'
elif not text_decoration_line:
text_decoration_line = 'none'
yield 'text_decoration_line', text_decoration_line
yield 'text_decoration_color', text_decoration_color or 'currentColor'
yield 'text_decoration_style', text_decoration_style or 'solid'
def catColorAsRGBInt(category):
if 'color' in category:
rgb = parse_color(category['color'])
if rgb is None:
return None
return (int(rgb.red * 255) << 16) + (int(rgb.green * 255) << 8) + int(
rgb.blue * 255)
return None
def is_valid_css_color(css_color: str) -> bool:
"""Determines whether css color is valid.
:param css_color: css color
:type css_color: str
:return: whether css color is valid
:rtype: bool
"""
return parse_color(css_color) is not None
def expand_border_side(name, tokens):
"""Expand the ``border-*`` shorthand properties.
See http://www.w3.org/TR/CSS21/box.html#propdef-border-top
"""
for token in tokens:
if parse_color(token) is not None:
suffix = '-color'
elif border_width([token]) is not None:
suffix = '-width'
elif border_style([token]) is not None:
suffix = '-style'
else:
raise InvalidValues
yield suffix, [token]
def expand_border_side(name, tokens):
"""Expand the ``border-*`` shorthand properties.
See http://www.w3.org/TR/CSS21/box.html#propdef-border-top
"""
for token in tokens:
if parse_color(token) is not None:
suffix = '-color'
elif border_width([token]) is not None:
suffix = '-width'
elif border_style([token]) is not None:
suffix = '-style'
else:
raise InvalidValues
yield suffix, [token]
def compute_attr_function(computer, values):
# TODO: use real token parsing instead of casting with Python types
func_name, value = values
assert func_name == 'attr()'
attr_name, type_or_unit, fallback = value
# computer.element sometimes is None
# computer.element sometimes is a 'PageType' object without .get()
# so wrapt the .get() into try and return None instead of crashing
try:
attr_value = computer.element.get(attr_name, fallback)
if type_or_unit == 'string':
pass # Keep the string
elif type_or_unit == 'url':
if attr_value.startswith('#'):
attr_value = ('internal', unquote(attr_value[1:]))
else:
attr_value = (
'external', safe_urljoin(computer.base_url, attr_value))
elif type_or_unit == 'color':
attr_value = parse_color(attr_value.strip())
elif type_or_unit == 'integer':
attr_value = int(attr_value.strip())
elif type_or_unit == 'number':
attr_value = float(attr_value.strip())
elif type_or_unit == '%':
attr_value = Dimension(float(attr_value.strip()), '%')
type_or_unit = 'length'
elif type_or_unit in LENGTH_UNITS:
attr_value = Dimension(float(attr_value.strip()), type_or_unit)
type_or_unit = 'length'
elif type_or_unit in ANGLE_TO_RADIANS:
attr_value = Dimension(float(attr_value.strip()), type_or_unit)
type_or_unit = 'angle'
except Exception:
return
return (type_or_unit, attr_value)
def compute_attr_function(computer, values):
# TODO: use real token parsing instead of casting with Python types
func_name, value = values
assert func_name == 'attr()'
attr_name, type_or_unit, fallback = value
# computer['element'] sometimes is None
# computer['element'] sometimes is a 'PageType' object without .get()
# so wrapt the .get() into try and return None instead of crashing
try:
attr_value = computer['element'].get(attr_name, fallback)
if type_or_unit == 'string':
pass # Keep the string
elif type_or_unit == 'url':
if attr_value.startswith('#'):
attr_value = ('internal', unquote(attr_value[1:]))
else:
attr_value = ('external',
safe_urljoin(computer['base_url'], attr_value))
elif type_or_unit == 'color':
attr_value = parse_color(attr_value.strip())
elif type_or_unit == 'integer':
attr_value = int(attr_value.strip())
elif type_or_unit == 'number':
attr_value = float(attr_value.strip())
elif type_or_unit == '%':
attr_value = Dimension(float(attr_value.strip()), '%')
type_or_unit = 'length'
elif type_or_unit in LENGTH_UNITS:
attr_value = Dimension(float(attr_value.strip()), type_or_unit)
type_or_unit = 'length'
elif type_or_unit in ANGLE_TO_RADIANS:
attr_value = Dimension(float(attr_value.strip()), type_or_unit)
type_or_unit = 'angle'
except Exception:
return
return (type_or_unit, attr_value)
def test_color3_hsl():
for css, expected in load_json('color3_hsl.json'):
assert to_json(parse_color(css)) == expected
def color(string):
"""Safely parse a color string and return a RGBA tuple."""
return parse_color(string or '') or (0, 0, 0, 1)
def other_colors(token):
return parse_color(token)
def other_colors(token):
return parse_color(token)
def outline_color(token):
if get_keyword(token) == 'invert':
return 'currentColor'
else:
return parse_color(token)
from __future__ import division, unicode_literals
import collections
from tinycss2.color3 import parse_color
Dimension = collections.namedtuple('Dimension', ['value', 'unit'])
# See http://www.w3.org/TR/CSS21/propidx.html
INITIAL_VALUES = {
'bottom': 'auto',
'caption_side': 'top',
'clear': 'none',
'clip': (), # computed value for 'auto'
'color': parse_color('black'), # chosen by the user agent
'content': 'normal',
# Means 'none', but allow `display: list-item` to increment the
# list-item counter. If we ever have a way for authors to query
# computed values (JavaScript?), this value should serialize to 'none'.
'counter_increment': 'auto',
'counter_reset': (), # parsed value for 'none'
# 'counter_set': (), # parsed value for 'none'
'direction': 'ltr',
'display': 'inline',
'empty_cells': 'show',
'float': 'none',
'height': 'auto',
'left': 'auto',
'line_height': 'normal',
'list_style_image': ('none', None),
"""
import collections
from tinycss2.color3 import parse_color
Dimension = collections.namedtuple('Dimension', ['value', 'unit'])
# See http://www.w3.org/TR/CSS21/propidx.html
INITIAL_VALUES = {
'bottom': 'auto',
'caption_side': 'top',
'clear': 'none',
'clip': (), # computed value for 'auto'
'color': parse_color('black'), # chosen by the user agent
# Means 'none', but allow `display: list-item` to increment the
# list-item counter. If we ever have a way for authors to query
# computed values (JavaScript?), this value should serialize to 'none'.
'counter_increment': 'auto',
'counter_reset': (), # parsed value for 'none'
# 'counter_set': (), # parsed value for 'none'
'direction': 'ltr',
'display': 'inline',
'empty_cells': 'show',
'float': 'none',
'height': 'auto',
'left': 'auto',
'line_height': 'normal',
'list_style_image': ('none', None),
'list_style_position': 'outside',
def outline_color(token):
if get_keyword(token) == 'invert':
return 'currentColor'
else:
return parse_color(token)
def test_color3(input):
return parse_color(input)
def test_parse_declaration_value_color():
source = 'color:#369'
declaration = parse_one_declaration(source)
(value_token,) = declaration.value
assert parse_color(value_token) == (.2, .4, .6, 1)
assert declaration.serialize() == source