mirror of
https://github.com/Kozea/WeasyPrint.git
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f78eb3763e
In this content-list, here are the possibilities: - string: implemented - counter/counters: not implemented, but easily possible - content: implemented (but what's exactly the "string value of an element"?) - attr: not implemented (I don't know how to do this)
290 lines
8.1 KiB
Python
290 lines
8.1 KiB
Python
# coding: utf8
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"""
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weasyprint.css.properties
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-------------------------
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Various data about known properties.
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:copyright: Copyright 2011-2014 Simon Sapin and contributors, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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from __future__ import division, unicode_literals
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import collections
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from tinycss.color3 import COLOR_KEYWORDS
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Dimension = collections.namedtuple('Dimension', ['value', 'unit'])
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# See http://www.w3.org/TR/CSS21/propidx.html
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INITIAL_VALUES = {
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'background_attachment': ['scroll'],
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'background_color': COLOR_KEYWORDS['transparent'],
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'background_image': [('none', None)],
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'background_position': [('left', Dimension(0, '%'),
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'top', Dimension(0, '%'))],
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'background_repeat': [('repeat', 'repeat')],
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'background_clip': ['border-box'], # CSS3
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'background_origin': ['padding-box'], # CSS3
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'background_size': [('auto', 'auto')], # CSS3
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'border_collapse': 'separate',
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# http://www.w3.org/TR/css3-color/#currentcolor
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'border_top_color': 'currentColor',
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'border_right_color': 'currentColor',
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'border_bottom_color': 'currentColor',
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'border_left_color': 'currentColor',
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'border_spacing': (0, 0),
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'border_top_style': 'none',
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'border_right_style': 'none',
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'border_bottom_style': 'none',
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'border_left_style': 'none',
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'border_top_width': 3, # Computed value for 'medium'
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'border_right_width': 3,
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'border_bottom_width': 3,
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'border_left_width': 3,
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'bottom': 'auto',
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'caption_side': 'top',
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'clear': 'none',
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'clip': (), # empty collection, computed value for 'auto'
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'color': COLOR_KEYWORDS['black'], # chosen by the user agent
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'content': 'normal',
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# Means 'none', but allow `display: list-item` to increment the
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# list-item counter. If we ever have a way for authors to query
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# computed values (JavaScript?), this value should serialize to 'none'.
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'counter_increment': 'auto',
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'counter_reset': [], # parsed value for 'none'
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# 'counter_set': [], # parsed value for 'none'
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'direction': 'ltr',
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'display': 'inline',
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'empty_cells': 'show',
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'float': 'none',
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'font_family': ['serif'], # depends on user agent
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'font_size': 16, # Actually medium, but we define medium from this.
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'font_stretch': 'normal', # css3-fonts
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'font_style': 'normal',
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'font_variant': 'normal',
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'font_weight': 400,
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'height': 'auto',
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'left': 'auto',
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'letter_spacing': 'normal',
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'line_height': 'normal',
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'list_style_image': ('none', None),
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'list_style_position': 'outside',
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'list_style_type': 'disc',
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'margin_top': Dimension(0, 'px'),
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'margin_right': Dimension(0, 'px'),
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'margin_bottom': Dimension(0, 'px'),
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'margin_left': Dimension(0, 'px'),
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'max_height': Dimension(float('inf'), 'px'), # Parsed value for 'none'
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'max_width': Dimension(float('inf'), 'px'),
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'min_height': Dimension(0, 'px'),
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'min_width': Dimension(0, 'px'),
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'orphans': 2,
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'outline_color': 'currentColor', # invert is not supported
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'outline_style': 'none',
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'outline_width': 3, # Computed value for 'medium'
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'overflow': 'visible',
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'padding_top': Dimension(0, 'px'),
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'padding_right': Dimension(0, 'px'),
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'padding_bottom': Dimension(0, 'px'),
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'padding_left': Dimension(0, 'px'),
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'page_break_after': 'auto',
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'page_break_before': 'auto',
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'page_break_inside': 'auto',
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'quotes': list('“”‘’'), # depends on user agent
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'position': 'static',
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'right': 'auto',
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# http://dev.w3.org/csswg/css-gcpm/#named-strings
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'string_set': 'none',
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'table_layout': 'auto',
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# Taken from CSS3 Text.
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# The only other supported value form CSS3 is -weasy-end.
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'text_align': '-weasy-start',
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'text_decoration': 'none',
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'text_indent': Dimension(0, 'px'),
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'text_transform': 'none',
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'top': 'auto',
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'unicode_bidi': 'normal',
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'vertical_align': 'baseline',
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'visibility': 'visible',
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'white_space': 'normal',
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'widows': 2,
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'width': 'auto',
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'word_spacing': 0, # computed value for 'normal'
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'z_index': 'auto',
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# CSS3 Paged Media: http://www.w3.org/TR/css3-page/#page-size
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'size': None, # XXX set to A4 in computed_values
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# CSS3 User Interface: http://www.w3.org/TR/css3-ui/#box-sizing
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'box_sizing': 'content-box',
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'overflow_wrap': 'normal',
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# CSS3 Backgrounds and Borders: http://www.w3.org/TR/css3-background/
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'border_top_left_radius': (Dimension(0, 'px'), Dimension(0, 'px')),
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'border_top_right_radius': (Dimension(0, 'px'), Dimension(0, 'px')),
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'border_bottom_left_radius': (Dimension(0, 'px'), Dimension(0, 'px')),
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'border_bottom_right_radius': (Dimension(0, 'px'), Dimension(0, 'px')),
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# CSS3 Color: http://www.w3.org/TR/css3-color/#transparency
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'opacity': 1,
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# CSS3 2D Transforms: http://www.w3.org/TR/css3-2d-transforms
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'transform_origin': (Dimension(50, '%'), Dimension(50, '%')),
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'transform': (), # empty sequence: computed value for 'none'
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# Taken from SVG:
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# http://www.w3.org/TR/SVG/painting.html#ImageRenderingProperty
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'image_rendering': 'auto',
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# http://www.w3.org/TR/css3-images/#the-image-resolution
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'image_resolution': 1, # dppx
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# Proprietary
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'anchor': None, # computed value of 'none'
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'link': None, # computed value of 'none'
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'lang': None, # computed value of 'none'
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# CSS3 Generated Content for Paged Media
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# http://dev.w3.org/csswg/css3-gcpm/
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'bookmark_label': [('content', 'text')],
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'bookmark_level': 'none',
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# CSS4 Text
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# http://dev.w3.org/csswg/css4-text/#hyphenation
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'hyphens': 'manual',
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'hyphenate_character': '‐',
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'hyphenate_limit_chars': (5, 2, 2),
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'hyphenate_limit_zone': Dimension(0, 'px'),
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# Internal, to implement the "static position" for absolute boxes.
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'_weasy_specified_display': 'inline',
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}
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KNOWN_PROPERTIES = set(name.replace('_', '-') for name in INITIAL_VALUES)
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# Not applicable to the print media
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NOT_PRINT_MEDIA = set([
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# Aural media:
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'azimuth',
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'cue',
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'cue-after',
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'cue-before',
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'cursor',
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'elevation',
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'pause',
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'pause-after',
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'pause-before',
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'pitch-range',
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'pitch',
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'play-during',
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'richness',
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'speak-header',
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'speak-numeral',
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'speak-punctuation',
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'speak',
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'speech-rate',
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'stress',
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'voice-family',
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'volume',
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# outlines are not just for interactive but any visual media in css3-ui
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])
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# Do not list shorthand properties here as we handle them before inheritance.
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#
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# text_decoration is not a really inherited, see
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# http://www.w3.org/TR/CSS2/text.html#propdef-text-decoration
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#
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# link: click events normally bubble up to link ancestors
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# See http://lists.w3.org/Archives/Public/www-style/2012Jun/0315.html
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INHERITED = set("""
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border_collapse
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border_spacing
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caption_side
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color
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direction
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empty_cells
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font_family
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font_size
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font_style
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font_stretch
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font_variant
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font_weight
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letter_spacing
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line_height
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list_style_image
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list_style_position
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list_style_type
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orphans
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overflow_wrap
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quotes
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text_align
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text_decoration
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text_indent
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text_transform
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visibility
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white_space
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widows
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word_spacing
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hyphens
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hyphenate_character
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hyphenate_limit_chars
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hyphenate_limit_zone
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image_rendering
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image_resolution
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lang
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link
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""".split())
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# Inherited but not applicable to print:
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# azimuth
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# cursor
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# elevation
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# pitch_range
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# pitch
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# richness
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# speak_header
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# speak_numeral
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# speak_punctuation
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# speak
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# speech_rate
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# stress
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# voice_family
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# volume
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# http://www.w3.org/TR/CSS21/tables.html#model
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# See also http://lists.w3.org/Archives/Public/www-style/2012Jun/0066.html
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# Only non-inherited properties need to be included here.
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TABLE_WRAPPER_BOX_PROPERTIES = set('''
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position
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float
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margin_top
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margin_bottom
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margin_left
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margin_right
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top
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bottom
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left
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right
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clear
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counter_increment
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counter_reset
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opacity
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page_break_before
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page_break_after
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page_break_inside
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transform
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transform_origin
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vertical_align
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z_index
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'''.split())
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