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InputText: optimize InputTextCalcTextLenAndLineCount() for inactive multiline path. (#7925)

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ocornut 2024-09-16 14:52:42 +02:00
parent 7ac50bf77d
commit 4925695ae8
1 changed files with 11 additions and 5 deletions
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16
imgui_widgets.cpp
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@ -3822,16 +3822,22 @@ bool ImGui::InputTextWithHint(const char* label, const char* hint, char* buf, si
return InputTextEx(label, hint, buf, (int)buf_size, ImVec2(0, 0), flags, callback, user_data);
}
// This is only used in the path where the multiline widget is inactivate.
static int InputTextCalcTextLenAndLineCount(const char* text_begin, const char** out_text_end)
{
int line_count = 0;
const char* s = text_begin;
while (char c = *s++) // We are only matching for \n so we can ignore UTF-8 decoding
if (c == '\n')
line_count++;
s--;
if (s[0] != '\n' && s[0] != '\r')
while (true)
{
const char* s_eol = strchr(s, '\n');
line_count++;
if (s_eol == NULL)
{
s = s + strlen(s);
break;
}
s = s_eol + 1;
}
*out_text_end = s;
return line_count;
}