Reorganize inheriting order and refactor SVGMobject #1745
Merged
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Motivation
Fix some potential bugs left in #1731.
Proposed changes
manimlib/mobject/svg/svg_mobject.py: Addsvg_defaultdictionary to allow users to specifically fill in style attributes to elements whose style is not specified in svg scope (and the functionality ofinit_colorsis therefore preserved); usexml.dom.ElementTreepackage to parse style attributes in the outer svg tag; useSVG_HASH_TO_MOB_MAPto cache svg mobjectsmanimlib/mobject/svg/drawings.py: Remove unnecessaryinit_colorsoverridemanimlib/mobject/svg/text_mobject.py: Remove unnecessaryset_fillprocessmanimlib/mobject/svg/mtex_mobject.py: Reorganize inheriting structure (MTexinherits fromSVGMobject)manimlib/mobject/svg/tex_mobject.py: Reorganize inheriting structure (SingleStringTexinherits fromSVGMobject)manimlib/utils/tex_file_writing.py: Avoid the message from being too longmanimlib/utils/iterables.py: Addhash_objfunction to hash objects that may contain dictionaries