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csi: SGR 21 is “double underline”, not “disable bold” (according to ECMA-48)

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Daniel Eklöf 2020-12-14 19:10:30 +01:00
parent 6c8b034aff
commit 04703c07f0
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2 changed files with 4 additions and 1 deletions
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3
CHANGELOG.md
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@ -110,6 +110,9 @@ means foot can be PGO:d in e.g. sandboxed build scripts. See
* The sub-parameter versions of the SGR RGB color escapes (e.g
`\E[38:2...m`) can now be used _without_ the color space ID
parameter.
* SGR 21 no longer disables **bold**. According to ECMA-4, SGR 21 is
_”double underline_”. Foot does not (yet) implement that, but that’s
no reason to implement a non-standard behavior.
### Deprecated

2
csi.c
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@ -94,7 +94,7 @@ csi_sgr(struct terminal *term)
case 8: term->vt.attrs.conceal = true; break;
case 9: term->vt.attrs.strikethrough = true; break;
case 21: term->vt.attrs.bold = false; break;
case 21: break; /* double-underline, not implemented */
case 22: term->vt.attrs.bold = term->vt.attrs.dim = false; break;
case 23: term->vt.attrs.italic = false; break;
case 24: term->vt.attrs.underline = false; break;