GNU bug report logs -
#73752
29.4; Ligatures are randomly rendered with extra spaces
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Reported by: xuan <at> xlk.me
Date: Fri, 11 Oct 2024 21:40:02 UTC
Severity: normal
Merged with 54646
Found in versions 29.0.50, 29.4
Fixed in version 30.1
Done: Eli Zaretskii <eliz <at> gnu.org>
Bug is archived. No further changes may be made.
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On 10/27/24 16:07, Eli Zaretskii wrote:
> To convince me that this is really happening (although I'm unable to
> understand how it could, given how Emacs faces work), you will need to
> show some code which generates such a situation in a reproducible
> manner, and then show me by using "M-x describe-text-properties" and
> "C-u C-x =" that indeed the same characters in the same face are shown
> on different lines with different metrics.
OK, here you go.
> you will need to show some code which generates such a situation in a reproducible manner
The same script I submitted in this bug.
"screenshot1.png" shows the bugged display. Here's the result of
"describe-text-properties",
> There are text properties here:
> face (face12 font-lock-string-face)
> fontified t
In case you want to know what the face12 is,
> Face: face12 (sample) (customize this face)
>
> Documentation:
> Not documented as a face.
>
>
> Family: unspecified
> Foundry: unspecified
> Width: unspecified
> Height: 125
> Weight: medium
> Slant: italic
> Foreground: unspecified
> DistantForeground: unspecified
> Background: unspecified
> Underline: unspecified
> Overline: unspecified
> Strike-through: unspecified
> Box: unspecified
> Inverse: unspecified
> Stipple: unspecified
> Font: unspecified
> Fontset: unspecified
> Extend: unspecified
> Inherit: unspecified
and here's the result of "C-x C-u =":
> position: 1277 of 3527 (36%), column: 34
> character: > (displayed as >) (codepoint 62, #o76, #x3e)
> charset: ascii (ASCII (ISO646 IRV))
> code point in charset: 0x3E
> script: latin
> syntax: _ which means: symbol
> category: .:Base, a:ASCII, l:Latin, r:Roman
> to input: type "C-x 8 RET 3e" or "C-x 8 RET GREATER-THAN SIGN"
> buffer code: #x3E
> file code: #x3E (encoded by coding system utf-8-unix)
> display: by this font (glyph code):
> ftcrhb:-SAJA-Cascadia Code-regular-italic-normal-*-17-*-*-*-m-0-iso10646-1 (#x3AC)
>
> Character code properties: customize what to show
> name: GREATER-THAN SIGN
> general-category: Sm (Symbol, Math)
> decomposition: (62) ('>')
>
> There are text properties here:
> face (face12 font-lock-string-face)
> fontified t
In a separate fresh new emacs window, I execute the following command:
(set-face-attribute 'default nil :weight 'medium :slant 'italic
:height 125)
"screenshot2.png" shows how it looks this time (the normal display).
the result of "describe-text-properties":
> There are text properties here:
> face font-lock-string-face
> fontified nil
and "C-u C-x =":
> position: 1277 of 3527 (36%), column: 34
> character: > (displayed as >) (codepoint 62, #o76, #x3e)
> charset: ascii (ASCII (ISO646 IRV))
> code point in charset: 0x3E
> script: latin
> syntax: _ which means: symbol
> category: .:Base, a:ASCII, l:Latin, r:Roman
> to input: type "C-x 8 RET 3e" or "C-x 8 RET GREATER-THAN SIGN"
> buffer code: #x3E
> file code: #x3E (encoded by coding system utf-8-unix)
> display: by this font (glyph code):
> ftcrhb:-SAJA-Cascadia Code-regular-italic-normal-*-17-*-*-*-m-0-iso10646-1 (#x3AC)
>
> Character code properties: customize what to show
> name: GREATER-THAN SIGN
> general-category: Sm (Symbol, Math)
> decomposition: (62) ('>')
>
> There are text properties here:
> face font-lock-string-face
> fontified t
If you want more information, I will keep both emacs window open for the
next two hours.
[screenshot1.png (image/png, attachment)]
[screenshot2.png (image/png, attachment)]
This bug report was last modified 253 days ago.
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