_parse_and_cache_line(self, line)
The format is (partially) documented at http://mirrors.ctan.org/systems/doc/pdftex/manual/pdftex-a.pdf https://tug.org/texinfohtml/dvips.html#psfonts_002emap Each line can have the following fields:
tfmname (first, only required field),
psname (defaults to tfmname, must come immediately after tfmname if present),
fontflags (integer, must come immediately after psname if present, ignored by us),
special (SlantFont and ExtendFont, only field that is double-quoted),
fontfile, encodingfile (optional, prefixed by <, <<, or <[; << always precedes a font, <[ always precedes an encoding, < can precede either but then an encoding file must have extension .enc; < and << also request different font subsetting behaviors but we ignore that; < can be separated from the filename by whitespace).
special, fontfile, and encodingfile can appear in any order.
Parse a line in the font mapping file.
Hover to see nodes names; edges to Self not shown, Caped at 50 nodes.
Using a canvas is more power efficient and can get hundred of nodes ; but does not allow hyperlinks; , arrows or text (beyond on hover)
SVG is more flexible but power hungry; and does not scale well to 50 + nodes.
All aboves nodes referred to, (or are referred from) current nodes; Edges from Self to other have been omitted (or all nodes would be connected to the central node "self" which is not useful). Nodes are colored by the library they belong to, and scaled with the number of references pointing them