STINNER Victor <vstin...@python.org> added the comment:
In LibreOffice, I see 4 flavors of "Cantarell" with different *weight* :
Cantarell
Cantarell Extra Bold
Cantarell Light
Cantarell Thin
whereas tkinter.font.families(frame) returns 4 times the same string:
"Cantarell". The C function of Tk is TkpGetFontFamilies().
The X11 implementation uses XListFonts() which returns a string like
"-foundry-family-weight-slant-(...)" but the function only returns the "family"
substring: it ignores the foundy and the weight for example. So it's not
surprising to get duplicates. Example:
"-adobe-helvetica-bold-o-normal--11-80-100-100-p-60-iso8859-1" becomes
"helvetica".
There is also a Xft implementation which uses XftListFonts(). Then it uses
XftPatternGetString() to get a font family.
I see no logic in Tcl to exclude duplicated family names of different weights.
--
>>> tkinter.font.names(frame)
('TkCaptionFont', 'TkSmallCaptionFont', 'TkTooltipFont', 'TkFixedFont',
'TkHeadingFont', 'TkMenuFont', 'TkIconFont', 'TkTextFont', 'TkDefaultFont')
That's something different that I would call unrelated ;-)
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<https://bugs.python.org/issue39600>
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