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Use em rather than percent for MathML mo minsize, maxsize #2341

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Apr 2, 2024
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Use em rather than percent for MathML mo minsize, maxsize #2341

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11 changes: 9 additions & 2 deletions lib/LaTeXML/Post/MathML.pm
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Original file line number Diff line number Diff line change
Expand Up @@ -645,6 +645,9 @@ sub pmml_infix {
my %default_token_content = (
MULOP => "\x{2062}", ADDOP => "\x{2064}", PUNCT => "\x{2063}");

# chars that all browsers will know are stretchy (notably, apparently, NOT "|")
my %safe_stretchy = map { $_ => 1; } "(", ")", "[", "]", "{", "}";

# Remaps some mathvariants to a simpler subset of Unicode
my %plane1hackable = ( # CONSTANT
script => 'script',
Expand Down Expand Up @@ -777,11 +780,15 @@ sub stylizeContent {
# (Thanks Peter Krautzberger)
# Really we should check the Operator Dictionary to see if it's expected to be symmetric
if ($size) { # if non-default size
if ($size =~ /^(.*?)%$/) { # Convert to em, as safari apparently ignores %
$size = fmt_em($1 / 100); }
if ($issymm || $props{symmetric}) { # but should be symmetric?
$stretchyhack = 1;
$stretchy = 1; } # so, pretend we asked for stretchy
# BUT force attribute to avoid browser bugs. (esp "|")
$props{stretchy} = undef unless $safe_stretchy{$text};
$stretchy = 1; } # so, pretend we asked for stretchy
elsif ($tag eq 'm:mo') {
$stretchy = undef; } } } # Conversely, if size specifically set, don't stretch it!
$stretchy = undef; } } } # Conversely, if size specifically set, don't stretch it!

return ($text,
($variant ? (mathvariant => $variant) : ()),
Expand Down
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