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sort font faces

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GNUstep's font architecture makes it extremely difficult and annoying to
have a properly sorted font panel (or even one that makes any sense at all).

This might not be the best place to implement font sorting, but I'll be
damned if I can find a better one. The font enumerator knows where to look,
and has all the information needed to do it.

So, once we've enumerated all the fonts, sort them with a function that's
only slightly more clever than alphabetizing them. We sort by these
criteria, in order of importance:

1. font weight
2. traits (numeric ordering)
3. style name, with special cases so "Regular"/"Normal"/"Roman" sort
   earlier than other stuff (caption, titling, etc.)

This sorting function seems to work about as well as can be expected,
producing the obvious "Regular"/"Italic"/"Bold"/"Bold Italic" for
undemanding families, while getting more advanced ones (like, say, the 168
font faces of Kepler Std) pretty close.
This commit is contained in:
Jeff Teunissen 2013-11-26 21:39:30 -05:00
parent 233e44dc4c
commit ecba94053d
1 changed files with 56 additions and 0 deletions
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56
Source/fontconfig/FCFontEnumerator.m
View file

@ -53,6 +53,51 @@
#define FC_WEIGHT_ULTRABLACK FC_WEIGHT_BLACK
#endif
static NSComparisonResult
sortFontFacesArray(id fontArr1, id fontArr2, void *context)
{
/*
Order of array:
0: Font name
1: Font style
2: Font weight
3: Font traits
*/
NSString *style1 = [fontArr1 objectAtIndex: 1];
NSString *style2 = [fontArr2 objectAtIndex: 1];
int weight1 = [[fontArr1 objectAtIndex: 2] intValue];
int weight2 = [[fontArr2 objectAtIndex: 2] intValue];
unsigned int traits1 = [[fontArr1 objectAtIndex: 3] unsignedIntValue];
unsigned int traits2 = [[fontArr2 objectAtIndex: 3] unsignedIntValue];
// order first by weight
if (weight1 > weight2)
return NSOrderedDescending;
if (weight1 < weight2)
return NSOrderedAscending;
if (traits1 < traits2)
return NSOrderedAscending;
if (traits1 > traits2)
return NSOrderedDescending;
// Special case: "Regular" sorts before non-Regular, for many reasons.
if ([style1 isEqualToString: @"Regular"] && ![style2 isEqualToString: @"Regular"])
return NSOrderedAscending;
if ([style2 isEqualToString: @"Regular"] && ![style1 isEqualToString: @"Regular"])
return NSOrderedDescending;
if ([style1 isEqualToString: @"Normal"] && ![style2 isEqualToString: @"Normal"])
return NSOrderedAscending;
if ([style2 isEqualToString: @"Normal"] && ![style1 isEqualToString: @"Normal"])
return NSOrderedDescending;
if ([style1 isEqualToString: @"Roman"] && ![style2 isEqualToString: @"Roman"])
return NSOrderedAscending;
if ([style2 isEqualToString: @"Roman"] && ![style1 isEqualToString: @"Roman"])
return NSOrderedDescending;
// Otherwise, alphabetize
return [style1 compare: style2];
}
@implementation FCFontEnumerator
NSMutableDictionary * __allFonts;
@ -307,6 +352,17 @@ static NSArray *faFromFc(FcPattern *pat)
allFontNames = fcxft_allFontNames;
allFontFamilies = fcxft_allFontFamilies;
__allFonts = fcxft_allFonts;
// Sort font families
{
NSComparisonResult (*fontSort) (id, id, void *) = sortFontFacesArray;
NSEnumerator *e = [allFontFamilies keyEnumerator];
id key;
while ((key = [e nextObject]))
{
[[allFontFamilies objectForKey: key] sortUsingFunction:fontSort context:NULL];
}
}
}
- (NSString *) defaultSystemFontName