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Find best matched font in TypefaceCompatApi29Impl #212

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Find best matched font in TypefaceCompatApi29Impl #212

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43 changes: 27 additions & 16 deletions core/core/src/main/java/androidx/core/graphics/TypefaceCompatApi29Impl.java
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,27 @@
@RestrictTo(LIBRARY_GROUP)
@RequiresApi(29)
public class TypefaceCompatApi29Impl extends TypefaceCompatBaseImpl {

private static int getMatchScore(@NonNull FontStyle o1, @NonNull FontStyle o2) {
return Math.abs((o1.getWeight() - o2.getWeight())) / 100 + (o1.getSlant() == o2.getSlant() ? 0 : 2);
}

private Font findBaseFont(@NonNull FontFamily family) {
final FontStyle normal = new FontStyle(FontStyle.FONT_WEIGHT_NORMAL,
FontStyle.FONT_SLANT_UPRIGHT);
Font bestFont = family.getFont(0);
int bestScore = getMatchScore(normal, bestFont.getStyle());
for (int i = 1; i < family.getSize(); ++i) {
final Font candidate = family.getFont(i);
final int score = getMatchScore(normal, candidate.getStyle());
if (score < bestScore) {
bestFont = candidate;
bestScore = score;
}
}
return bestFont;
}

@Override
protected FontsContractCompat.FontInfo findBestInfo(FontsContractCompat.FontInfo[] fonts,
int style) {
Expand Down Expand Up @@ -86,14 +107,9 @@ public Typeface createFromFontInfo(Context context,
if (familyBuilder == null) {
return null; // No font is added. Give up.
}
final FontStyle defaultStyle = new FontStyle(
(style & Typeface.BOLD) != 0 ? FontStyle.FONT_WEIGHT_BOLD
: FontStyle.FONT_WEIGHT_NORMAL,
(style & Typeface.ITALIC) != 0 ? FontStyle.FONT_SLANT_ITALIC
: FontStyle.FONT_SLANT_UPRIGHT
);
return new Typeface.CustomFallbackBuilder(familyBuilder.build())
.setStyle(defaultStyle)
final FontFamily family = familyBuilder.build();
return new Typeface.CustomFallbackBuilder(family)
.setStyle(findBaseFont(family).getStyle())
.build();
} catch (Exception e) {
return null;
Expand Down Expand Up @@ -128,14 +144,9 @@ public Typeface createFromFontFamilyFilesResourceEntry(Context context,
if (familyBuilder == null) {
return null; // No font is added. Give up.
}
final FontStyle defaultStyle = new FontStyle(
(style & Typeface.BOLD) != 0 ? FontStyle.FONT_WEIGHT_BOLD
: FontStyle.FONT_WEIGHT_NORMAL,
(style & Typeface.ITALIC) != 0 ? FontStyle.FONT_SLANT_ITALIC
: FontStyle.FONT_SLANT_UPRIGHT
);
return new Typeface.CustomFallbackBuilder(familyBuilder.build())
.setStyle(defaultStyle)
final FontFamily family = familyBuilder.build();
return new Typeface.CustomFallbackBuilder(family)
.setStyle(findBaseFont(family).getStyle())
.build();
} catch (Exception e) {
return null;
Expand Down