style_utils

Utility functions for parsing SVG styles.

Functions

cascade_element_style(element, inherited)

Collect the element’s style attributes based upon both its inheritance and its own attributes.

SVG uses cascading element styles. A closer ancestor’s style takes precedence over a more distant ancestor’s style. In order to correctly calculate the styles, the attributes are passed down through the inheritance tree, updating where necessary.

Note that this method only copies the values and does not parse them. See parse_color_string() for converting from SVG attributes to manim keyword arguments.

Parameters

• element (MinidomElement) – Element of the SVG parse tree

• inherited (dict) – Dictionary of SVG attributes inherited from the parent element.

Returns

Dictionary mapping svg attributes to values with element’s values overriding inherited values.

Return type

dict

fill_default_values(svg_style)

Fill in the default values for properties of SVG elements, if they are not currently set in the style dictionary.

Parameters

svg_style (dict) – Style dictionary with SVG property names. Some may be missing.

Returns

Style attributes; none are missing.

Return type

dict

parse_color_string(color_spec)

Handle the SVG-specific color strings and convert them to HTML #rrggbb format.

Parameters

color_spec (str) – String in any web-compatible format

Returns

Hexadecimal color string in the format #rrggbb

Return type

str

parse_style(svg_style)

Convert a dictionary of SVG attributes to Manim VMobject keyword arguments.

Parameters

svg_style (dict) – Style attributes as a string-to-string dictionary. Keys are valid SVG element attributes (fill, stroke, etc)

Returns

Style attributes, but in manim kwargs form, e.g., keys are fill_color, stroke_color

Return type

dict