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Expand use elements

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YishiMichael 2022-05-29 16:26:40 +08:00
parent bc939fdd5b
commit 97ac8c9953
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1 changed files with 37 additions and 3 deletions
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40
manimlib/mobject/svg/svg_mobject.py
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@ -22,6 +22,8 @@ from manimlib.utils.simple_functions import hash_string
SVG_HASH_TO_MOB_MAP: dict[int, VMobject] = {}
SVG_XMLNS = "{http://www.w3.org/2000/svg}"
SVG_XLINK = "{http://www.w3.org/1999/xlink}"
def _convert_point_to_3d(x: float, y: float) -> np.ndarray:
@ -106,6 +108,8 @@ class SVGMobject(VMobject):
return get_full_vector_image_path(self.file_name)
def modify_xml_tree(self, element_tree: ET.ElementTree) -> ET.ElementTree:
element_tree = self.expand_use_elements(element_tree)
config_style_attrs = self.generate_config_style_dict()
style_keys = (
"fill",
@ -123,12 +127,42 @@ class SVGMobject(VMobject):
}
# Ignore other attributes in case that svgelements cannot parse them
new_root = ET.Element("svg", {})
config_style_node = ET.SubElement(new_root, "g", config_style_attrs)
root_style_node = ET.SubElement(config_style_node, "g", style_attrs)
new_root = ET.Element("svg")
config_style_node = ET.SubElement(new_root, f"{SVG_XMLNS}g", config_style_attrs)
root_style_node = ET.SubElement(config_style_node, f"{SVG_XMLNS}g", style_attrs)
root_style_node.extend(root)
return ET.ElementTree(new_root)
@staticmethod
def expand_use_elements(element_tree: ET.ElementTree) -> ET.ElementTree:
# Replace `use` elements with copies of elements they refer to
xpath = f".//{SVG_XMLNS}use[@{SVG_XLINK}href]"
element = element_tree.find(xpath)
while element is not None:
element.tag = f"{SVG_XMLNS}g"
attrs = element.attrib
href_str = attrs.pop(f"{SVG_XLINK}href")[1:]
href_element = element_tree.find(f".//{SVG_XMLNS}*[@id='{href_str}']")
if href_element is None:
continue
attrs.pop("width", None)
attrs.pop("height", None)
x = attrs.pop("x", "0")
y = attrs.pop("y", "0")
if not x == y == "0":
translate_str = f"translate({x}, {y})"
if "transform" in attrs:
attrs["transform"] = translate_str + " " + attrs["transform"]
else:
attrs["transform"] = translate_str
shadow_node = ET.SubElement(element, href_element.tag, href_element.attrib)
shadow_node.extend(href_element)
element = element_tree.find(xpath)
for defs_element in element_tree.iterfind(f".//{SVG_XMLNS}defs"):
defs_element.clear()
return element_tree
def generate_config_style_dict(self) -> dict[str, str]:
keys_converting_dict = {
"fill": ("color", "fill_color"),