On Fri, 11 Jul 2025 19:33:17 GMT, Phil Race <p...@openjdk.org> wrote:
>> Valery Semenchuk has refreshed the contents of this pull request, and
>> previous commits have been removed. The incremental views will show
>> differences compared to the previous content of the PR. The pull request
>> contains one new commit since the last revision:
>>
>> 8360136: introducing TextAttribute#PROPORTIONAL_FIGURES and
>> TextAttribute#TABULAR_FIGURES for controlling Font figure styles
>
> src/java.desktop/share/classes/java/awt/font/TextAttribute.java line 1122:
>
>> 1120: * <p>The constant value {@link #PROPORTIONAL_FIGURES_ON} is
>> defined.
>> 1121: *
>> 1122: * <p>Conflicts with {@link #TABULAR_FIGURES}
>
> True. So at an API level, should it be allowed to specify both at the same
> time ?
> Perhaps instead the attribute should be called FIGURE_WIDTH and have values
> of PROPORTIONAL and TABULAR
> But what about the other figure related 'standard' opentype features : lining
> and old style ?
>
> https://learn.microsoft.com/en-us/typography/opentype/spec/features_ko#lnum
> https://learn.microsoft.com/en-us/typography/opentype/spec/features_ko#onum
>
> They are the same idea but it affects height / vertical positioning instead
> of width
>
> So do we add FIGURE_HEIGHT too with values of LINING and OLDSTYLE ?
>
> Or .. do we add
> FIGURE_STYLE and provide the combinations like
> TABULAR_LINING and PROPORTIONAL_OLDSTYLE ?
>
> There'd be 16 values so I am not sure about that.
> May be have the WIDTH and HEIGHT options and let people select the pairs they
> want.
> Also it means if they 'don't care" about one or the other they can just not
> set it instead of thinking.
Hello. Main idea - is to provide access to control this features in a simple
way, without modification native & java too much.
Conflict described only in JavaDoc since - I don't want add special throws
inside `Font` constructor with this options.
About what you say. Yes - I thought about that, but it's too big change.
For example - will be nice move control hb features control from C++ code to
Java. For now it's controlled by flags, and not flexable.
What do you think about this api:
// internal api in sun.font
// enum for better control values, since there no sense give access to set
3,4,5+ values
public enum EFigureWidth {
// unset? unknown? undefined?
UNSET,
PROPORTIONAL_FIGURES, // pnum=1
TABULAR_FIGURES // tnum=1
}
// public api
public class TextAttribute {
public static final TextAttribute FIGURE_WIDTH = new
TextAttribute("figure-width");
public static final Object FIGURE_WIDTH_UNSET = EFigureWidth.UNSET;
public static final Object FIGURE_WIDTH_TABULAR =
EFigureWidth.TABULAR_FIGURES;
public static final Object FIGURE_WIDTH_PROPORTIONAL =
EFigureWidth.PROPORTIONAL_FIGURES;
// same for figure height
}
-------------
PR Review Comment: https://git.openjdk.org/jdk/pull/26144#discussion_r2202427915
