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font-patcher: Do not add Box drawing glyphs on propo fonts

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[why]
It does probably not make too much sense to add the box drawing glyphs
to proportional fonts. The boxes that are drawn need to be filled with
some text, and if that does not have monospaced property the box will
always look ugly and not fit and change when the font is changed.

[how]
Make the fact if we detect a source font as monospaced or not a property
of the patcher object.

Always determine that property (before we just determined it when the
target font should have monospaced behavior).

Use that new property to enable/disable the box drawing glyphs.

In a way it is now also prepared to add that as command line parameter
should the need for that arise.

Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>
This commit is contained in:
Fini Jastrow 2023-03-08 17:43:17 +01:00
parent 7b4d83c2f3
commit 9834207159
1 changed files with 20 additions and 15 deletions
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7
font-patcher
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@ -292,6 +292,7 @@ class font_patcher:
self.patch_set = None # class 'list'
self.font_dim = None # class 'dict'
self.font_extrawide = False
self.source_monospaced = None # Later True or False
self.onlybitmaps = 0
self.essential = set()
self.config = configparser.ConfigParser(empty_lines_in_values=False, allow_no_value=True)
@ -301,7 +302,6 @@ class font_patcher:
self.setup_version()
self.get_essential_references()
self.setup_name_backup(font)
if not self.args.nonmono:
self.assert_monospace()
self.remove_ligatures()
self.setup_patch_set()
@ -716,6 +716,9 @@ class font_patcher:
def assert_monospace(self):
# Check if the sourcefont is monospaced
width_mono, offending_char = is_monospaced(self.sourceFont)
self.source_monospaced = width_mono
if self.args.nonmono:
return
panose_mono = check_panose_monospaced(self.sourceFont)
# The following is in fact "width_mono != panose_mono", but only if panose_mono is not 'unknown'
if (width_mono and panose_mono == 0) or (not width_mono and panose_mono == 1):
@ -736,6 +739,8 @@ class font_patcher:
def setup_patch_set(self):
""" Creates list of dicts to with instructions on copying glyphs from each symbol font into self.sourceFont """
box_enabled = self.source_monospaced # Box glyph only for monospaced
if box_enabled:
self.sourceFont.selection.select(("ranges",), 0x2500, 0x259f)
box_glyphs_target = len(list(self.sourceFont.selection))
box_glyphs_current = len(list(self.sourceFont.selection.byGlyphs))