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fontsrv: avoid quote mapping on fonts with indistinguishable quotes

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Fixes #86.

Change-Id: Id487219a0fcfdb68133fc81b11383365a1431c1c
Reviewed-on: https://plan9port-review.googlesource.com/2922
Reviewed-by: Russ Cox <rsc@swtch.com>
This commit is contained in:
Russ Cox 2017-06-19 09:58:25 -04:00
parent 1f1ab4ccbb
commit 711336c348
1 changed files with 19 additions and 5 deletions
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24
src/cmd/fontsrv/osx.c
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@ -17,17 +17,31 @@
extern void CGFontGetGlyphsForUnichars(CGFontRef, const UniChar[], const CGGlyph[], size_t);
// In these fonts, it's too hard to distinguish U+2018 and U+2019,
// so don't map the ASCII quotes there.
// See https://github.com/9fans/plan9port/issues/86
static char *skipquotemap[] = {
"Courier",
"Osaka",
};
int
mapUnicode(int i)
mapUnicode(char *name, int i)
{
int j;
if(0xd800 <= i && i < 0xe0000) // surrogate pairs, will crash OS X libraries!
return 0xfffd;
for(j=0; j<nelem(skipquotemap); j++) {
if(strstr(name, skipquotemap[j]))
return i;
}
switch(i) {
case '\'':
return 0x2019;
case '`':
return 0x2018;
}
if(0xd800 <= i && i < 0xe0000) // surrogate pairs, will crash OS X libraries!
return 0xfffd;
return i;
}
@ -273,7 +287,7 @@ mksubfont(XFont *f, char *name, int lo, int hi, int size, int antialias)
CFStringRef keys[] = { kCTFontAttributeName, kCTForegroundColorAttributeName };
CFTypeRef values[] = { font, white };
sprint(buf, "%C", (Rune)mapUnicode(i));
sprint(buf, "%C", (Rune)mapUnicode(name, i));
str = c2mac(buf);
// See https://developer.apple.com/library/ios/documentation/StringsTextFonts/Conceptual/CoreText_Programming/LayoutOperations/LayoutOperations.html#//apple_ref/doc/uid/TP40005533-CH12-SW2
@ -298,7 +312,7 @@ mksubfont(XFont *f, char *name, int lo, int hi, int size, int antialias)
// fprint(2, "printed %#x: %g %g\n", mapUnicode(i), p1.x, p1.y);
p1 = CGContextGetTextPosition(ctxt);
if(p1.x <= 0 || mapUnicode(i) == 0xfffd) {
if(p1.x <= 0 || mapUnicode(name, i) == 0xfffd) {
fc->width = 0;
fc->left = 0;
if(i == 0) {