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Hide unicode directional control characters

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They shouldn't be looked up in the font and displayed under any
circumstances.
This commit is contained in:
Dav999
2024-01-03 18:55:42 +01:00
committed by Misa Elizabeth Kai
parent 45ec77973b
commit 2003eed2a5
3 changed files with 31 additions and 8 deletions
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29
desktop_version/src/FontBidi.cpp
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@@ -263,6 +263,25 @@ void bidi_destroy(void)
}
bool is_directional_character(const uint32_t codepoint)
{
// LEFT-TO-RIGHT MARK and RIGHT-TO-LEFT MARK
if (codepoint == 0x200E || codepoint == 0x200F) return true;
// Some other directional formatting: LRE, RLE, PDF, RLO, LRO
if (codepoint >= 0x202A && codepoint <= 0x202E) return true;
// The more recent isolates: LRI, RLI, FSI, PDI
if (codepoint >= 0x2066 && codepoint <= 0x2069) return true;
return false;
}
bool is_joiner(const uint32_t codepoint)
{
return codepoint == 0x200C || codepoint == 0x200D;
}
bool bidi_should_transform(const char* text)
{
/* Just as an optimization, only run the whole bidi machinery if the
@@ -278,14 +297,8 @@ bool bidi_should_transform(const char* text)
// Extended Arabic B and A
if (ch >= 0x870 && ch <= 0x8FF) return true;
// LEFT-TO-RIGHT MARK and RIGHT-TO-LEFT MARK
if (ch == 0x200E || ch == 0x200F) return true;
// Some other directional formatting: LRE, RLE, PDF, RLO, LRO
if (ch >= 0x202A && ch <= 0x202E) return true;
// The more recent isolates: LRI, RLI, FSI, PDI
if (ch >= 0x2066 && ch <= 0x2069) return true;
// Any directional control character
if (is_directional_character(ch)) return true;
// Hebrew presentation forms
if (ch >= 0xFB1D && ch <= 0xFB4F) return true;