Commit node_modules

2023-03-27 20:36:01 -07:00
parent 53a30a4c3e
commit 18ea53bb81
2693 changed files with 193960 additions and 70 deletions
--- a/paige/node_modules/katex/src/metrics/extract_ttfs.py
+++ b/paige/node_modules/katex/src/metrics/extract_ttfs.py
@@ -0,0 +1,122 @@
+#!/usr/bin/env python3
+
+from fontTools.ttLib import TTFont
+import sys
+import json
+
+# map of characters to extract
+metrics_to_extract = {
+    # Font name
+    "AMS-Regular": {
+        u"\u21e2": None,  # \dashrightarrow
+        u"\u21e0": None,  # \dashleftarrow
+    },
+    "Main-Regular": {
+        # Skew and italic metrics can't be easily parsed from the TTF. Instead,
+        # we map each character to a "base character", which is a character
+        # from the same font with correct italic and skew metrics. A character
+        # maps to None if it doesn't have a base.
+
+        #u"\u2209": None,  # \notin
+        #u"\u2260": None,  # \neq
+        u"\u2245": None,  # \cong
+        u"\u2026": None,  # \ldots
+        u"\u22ef": None,  # \cdots
+        u"\u22f1": None,  # \ddots
+        u"\u22ee": None,  # \vdots
+        u"\u22ee": None,  # \vdots
+        u"\u22a8": None,  # \models
+        u"\u22c8": None,  # \bowtie
+        u"\u2250": None,  # \doteq
+        u"\u23b0": None,  # \lmoustache
+        u"\u23b1": None,  # \rmoustache
+        u"\u27ee": None,  # \lgroup
+        u"\u27ef": None,  # \rgroup
+        u"\u27f5": None,  # \longleftarrow
+        u"\u27f8": None,  # \Longleftarrow
+        u"\u27f6": None,  # \longrightarrow
+        u"\u27f9": None,  # \Longrightarrow
+        u"\u27f7": None,  # \longleftrightarrow
+        u"\u27fa": None,  # \Longleftrightarrow
+        u"\u21a6": None,  # \mapsto
+        u"\u27fc": None,  # \longmapsto
+        u"\u21a9": None,  # \hookleftarrow
+        u"\u21aa": None,  # \hookrightarrow
+        u"\u21cc": None,  # \rightleftharpoons
+    },
+    "Main-Bold": {
+        u"\u2245": None,  # \cong
+    },
+    "Size1-Regular": {
+        u"\u222c": u"\u222b",  # \iint, based on \int
+        u"\u222d": u"\u222b",  # \iiint, based on \int
+    },
+    "Size2-Regular": {
+        u"\u222c": u"\u222b",  # \iint, based on \int
+        u"\u222d": u"\u222b",  # \iiint, based on \int
+    },
+}
+
+
+def main():
+    start_json = json.load(sys.stdin)
+
+    for font in start_json:
+        fontInfo = TTFont("../../fonts/KaTeX_" + font + ".ttf")
+        glyf = fontInfo["glyf"]
+        widths = fontInfo.getGlyphSet()
+        unitsPerEm = float(fontInfo["head"].unitsPerEm)
+
+        # We keep ALL Unicode cmaps, not just fontInfo["cmap"].getcmap(3, 1).
+        # This is playing it extra safe, since it reports inconsistencies.
+        # Platform 0 is Unicode, platform 3 is Windows. For platform 3,
+        # encoding 1 is UCS-2 and encoding 10 is UCS-4.
+        cmap = [t.cmap for t in fontInfo["cmap"].tables
+                if (t.platformID == 0)
+                or (t.platformID == 3 and t.platEncID in (1, 10))]
+
+        chars = metrics_to_extract.get(font, {})
+        chars[u"\u0020"] = None  # space
+        chars[u"\u00a0"] = None  # nbsp
+
+        for char, base_char in chars.items():
+            code = ord(char)
+            names = set(t.get(code) for t in cmap)
+            if not names:
+                sys.stderr.write(
+                    "Codepoint {} of font {} maps to no name\n"
+                    .format(code, font))
+                continue
+            if len(names) != 1:
+                sys.stderr.write(
+                    "Codepoint {} of font {} maps to multiple names: {}\n"
+                    .format(code, font, ", ".join(sorted(names))))
+                continue
+            name = names.pop()
+
+            height = depth = italic = skew = width = 0
+            glyph = glyf[name]
+            if glyph.numberOfContours:
+                height = glyph.yMax / unitsPerEm
+                depth = -glyph.yMin / unitsPerEm
+            width = widths[name].width / unitsPerEm
+            if base_char:
+                base_char_str = str(ord(base_char))
+                base_metrics = start_json[font][base_char_str]
+                italic = base_metrics["italic"]
+                skew = base_metrics["skew"]
+                width = base_metrics["width"]
+
+            start_json[font][str(code)] = {
+                "height": height,
+                "depth": depth,
+                "italic": italic,
+                "skew": skew,
+                "width": width
+            }
+
+    sys.stdout.write(
+        json.dumps(start_json, separators=(',', ':'), sort_keys=True))
+
+if __name__ == "__main__":
+    main()