d26a67f220
We had some duplicate mappings in mappings to start with. Now we have some code to complain loudly about these, and all currently existing duplicates have been dealt with. We also had a problem where in some Python dict, existing stuff was using strings as keys while new data would use numeric indices, thus not overwriting the previous value. Now we always use strings as keys. Along the road, the italic dotless i and j symbols were changed so that they now are taken from cmmi10 instead of cmti10.
99 lines
3.0 KiB
Python
Executable File
99 lines
3.0 KiB
Python
Executable File
#!/usr/bin/env python
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import fontforge
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import sys
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import json
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# map of characters to extract
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metrics_to_extract = {
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# Font name
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"AMS-Regular": {
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u"\u21e2": None, # \dashrightarrow
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u"\u21e0": None, # \dashleftarrow
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},
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"Main-Regular": {
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# Skew and italic metrics can't be easily parsed from the TTF. Instead,
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# we map each character to a "base character", which is a character
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# from the same font with correct italic and skew metrics. A character
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# maps to None if it doesn't have a base.
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u"\u2260": None, # \neq
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u"\u2245": None, # \cong
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u"\u0020": None, # space
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u"\u00a0": None, # nbsp
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u"\u2026": None, # \ldots
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u"\u22ef": None, # \cdots
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u"\u22f1": None, # \ddots
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u"\u22ee": None, # \vdots
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u"\u22ee": None, # \vdots
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u"\u22a8": None, # \models
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u"\u22c8": None, # \bowtie
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u"\u2250": None, # \doteq
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u"\u23b0": None, # \lmoustache
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u"\u23b1": None, # \rmoustache
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u"\u27ee": None, # \lgroup
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u"\u27ef": None, # \rgroup
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u"\u27f5": None, # \longleftarrow
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u"\u27f8": None, # \Longleftarrow
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u"\u27f6": None, # \longrightarrow
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u"\u27f9": None, # \Longrightarrow
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u"\u27f7": None, # \longleftrightarrow
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u"\u27fa": None, # \Longleftrightarrow
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u"\u21a6": None, # \mapsto
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u"\u27fc": None, # \longmapsto
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u"\u21a9": None, # \hookleftarrow
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u"\u21aa": None, # \hookrightarrow
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u"\u21cc": None, # \rightleftharpoons
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},
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"Size1-Regular": {
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u"\u222c": u"\u222b", # \iint, based on \int
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u"\u222d": u"\u222b", # \iiint, based on \int
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},
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"Size2-Regular": {
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u"\u222c": u"\u222b", # \iint, based on \int
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u"\u222d": u"\u222b", # \iiint, based on \int
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},
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}
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def main():
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start_json = json.load(sys.stdin)
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for font, chars in metrics_to_extract.iteritems():
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fontInfo = fontforge.open("../static/fonts/KaTeX_" + font + ".ttf")
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for glyph in fontInfo.glyphs():
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try:
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char = unichr(glyph.unicode)
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except ValueError:
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continue
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if char in chars:
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_, depth, _, height = glyph.boundingBox()
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depth = -depth
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base_char = chars[char]
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if base_char:
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base_char_str = str(ord(base_char))
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base_metrics = start_json[font][base_char_str]
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italic = base_metrics["italic"]
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skew = base_metrics["skew"]
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else:
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italic = 0
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skew = 0
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start_json[font][str(ord(char))] = {
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"height": height / fontInfo.em,
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"depth": depth / fontInfo.em,
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"italic": italic,
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"skew": skew,
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}
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sys.stdout.write(
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json.dumps(start_json, separators=(',', ':'), sort_keys=True))
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if __name__ == "__main__":
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main()
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