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InputText: restore truncating, now between UTF-8 codepoint. (#9029)

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Amend e612536, 2a194e2.
This commit is contained in:
ocornut 2025-10-29 18:40:40 +01:00
parent 8df962a6ed
commit 3c578fa87e
4 changed files with 24 additions and 8 deletions
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22
imgui.cpp
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@ -2663,17 +2663,29 @@ int ImTextCountUtf8BytesFromStr(const ImWchar* in_text, const ImWchar* in_text_e
return bytes_count;
}
const char* ImTextFindPreviousUtf8Codepoint(const char* in_text_start, const char* in_text_curr)
const char* ImTextFindPreviousUtf8Codepoint(const char* in_text_start, const char* in_p)
{
while (in_text_curr > in_text_start)
while (in_p > in_text_start)
{
in_text_curr--;
if ((*in_text_curr & 0xC0) != 0x80)
return in_text_curr;
in_p--;
if ((*in_p & 0xC0) != 0x80)
return in_p;
}
return in_text_start;
}
const char* ImTextFindValidUtf8CodepointEnd(const char* in_text_start, const char* in_text_end, const char* in_p)
{
if (in_text_start == in_p)
return in_text_start;
const char* prev = ImTextFindPreviousUtf8Codepoint(in_text_start, in_p);
unsigned int prev_c;
int prev_c_len = ImTextCharFromUtf8(&prev_c, prev, in_text_end);
if (prev_c != IM_UNICODE_CODEPOINT_INVALID && prev_c_len <= (int)(in_p - prev))
return in_p;
return prev;
}
int ImTextCountLines(const char* in_text, const char* in_text_end)
{
if (in_text_end == NULL)