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csi: implement DECSET/DECRST/DECRQM 2027 - grapheme cluster processing

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This implements private mode 2027 - grapheme cluster processing, as
defined in the "Terminal Unicode Core"[1] specification.

Internally, we just flip the already existing option "grapheme
shaping". Since it's now runtime changeable, we need a copy of it in
the terminal struct, rather than referencing the conf object.

[1]: 13fc5a8993/spec/terminal-unicode-core.tex (L50-L53)
This commit is contained in:
Daniel Eklöf 2023-09-20 13:45:06 +02:00
parent 8a5f2915e9
commit 4eef001d58
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7 changed files with 21 additions and 1 deletions
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vt.c
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@ -657,7 +657,7 @@ static void
action_utf8_print(struct terminal *term, char32_t wc)
{
int width = c32width(wc);
const bool grapheme_clustering = term->conf->tweak.grapheme_shaping;
const bool grapheme_clustering = term->grapheme_shaping;
#if !defined(FOOT_GRAPHEME_CLUSTERING)
xassert(!grapheme_clustering);