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Internals: Added ImTextCharToUtf8() helper. Added "out_" markers in more UTF-8 functions. Metrics: Fonts: Fixed display of EllipsisChar by feeding proper utf-8.

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This commit is contained in:
ocornut 2021-05-25 13:32:33 +02:00
parent 3a941f95e9
commit c2bf4abfa1
2 changed files with 26 additions and 17 deletions
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30
imgui.cpp
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@ -1701,7 +1701,7 @@ int ImTextCountCharsFromUtf8(const char* in_text, const char* in_text_end)
} }
// Based on stb_to_utf8() from github.com/nothings/stb/ // Based on stb_to_utf8() from github.com/nothings/stb/
static inline int ImTextCharToUtf8(char* buf, int buf_size, unsigned int c) static inline int ImTextCharToUtf8_inline(char* buf, int buf_size, unsigned int c)
{ {
if (c < 0x80) if (c < 0x80)
{ {
@ -1736,6 +1736,13 @@ static inline int ImTextCharToUtf8(char* buf, int buf_size, unsigned int c)
return 0; return 0;
} }
const char* ImTextCharToUtf8(char out_buf[5], unsigned int c)
{
int count = ImTextCharToUtf8_inline(out_buf, 5, c);
out_buf[count] = 0;
return out_buf;
}
// Not optimal but we very rarely use this function. // Not optimal but we very rarely use this function.
int ImTextCountUtf8BytesFromChar(const char* in_text, const char* in_text_end) int ImTextCountUtf8BytesFromChar(const char* in_text, const char* in_text_end)
{ {
@ -1752,20 +1759,20 @@ static inline int ImTextCountUtf8BytesFromChar(unsigned int c)
return 3; return 3;
} }
int ImTextStrToUtf8(char* buf, int buf_size, const ImWchar* in_text, const ImWchar* in_text_end) int ImTextStrToUtf8(char* out_buf, int out_buf_size, const ImWchar* in_text, const ImWchar* in_text_end)
{ {
char* buf_out = buf; char* buf_p = out_buf;
const char* buf_end = buf + buf_size; const char* buf_end = out_buf + out_buf_size;
while (buf_out < buf_end - 1 && (!in_text_end || in_text < in_text_end) && *in_text) while (buf_p < buf_end - 1 && (!in_text_end || in_text < in_text_end) && *in_text)
{ {
unsigned int c = (unsigned int)(*in_text++); unsigned int c = (unsigned int)(*in_text++);
if (c < 0x80) if (c < 0x80)
*buf_out++ = (char)c; *buf_p++ = (char)c;
else else
buf_out += ImTextCharToUtf8(buf_out, (int)(buf_end - buf_out - 1), c); buf_p += ImTextCharToUtf8_inline(buf_p, (int)(buf_end - buf_p - 1), c);
} }
*buf_out = 0; *buf_p = 0;
return (int)(buf_out - buf); return (int)(buf_p - out_buf);
} }
int ImTextCountUtf8BytesFromStr(const ImWchar* in_text, const ImWchar* in_text_end) int ImTextCountUtf8BytesFromStr(const ImWchar* in_text, const ImWchar* in_text_end)
@ -11459,8 +11466,9 @@ void ImGui::DebugNodeFont(ImFont* font)
"You can also render at multiple sizes and select which one to use at runtime.\n\n" "You can also render at multiple sizes and select which one to use at runtime.\n\n"
"(Glimmer of hope: the atlas system will be rewritten in the future to make scaling more flexible.)"); "(Glimmer of hope: the atlas system will be rewritten in the future to make scaling more flexible.)");
Text("Ascent: %f, Descent: %f, Height: %f", font->Ascent, font->Descent, font->Ascent - font->Descent); Text("Ascent: %f, Descent: %f, Height: %f", font->Ascent, font->Descent, font->Ascent - font->Descent);
Text("Fallback character: '%c' (U+%04X)", font->FallbackChar, font->FallbackChar); char c_str[5];
Text("Ellipsis character: '%c' (U+%04X)", font->EllipsisChar, font->EllipsisChar); Text("Fallback character: '%s' (U+%04X)", ImTextCharToUtf8(c_str, font->FallbackChar), font->FallbackChar);
Text("Ellipsis character: '%s' (U+%04X)", ImTextCharToUtf8(c_str, font->EllipsisChar), font->EllipsisChar);
const int surface_sqrt = (int)ImSqrt((float)font->MetricsTotalSurface); const int surface_sqrt = (int)ImSqrt((float)font->MetricsTotalSurface);
Text("Texture Area: about %d px ~%dx%d px", font->MetricsTotalSurface, surface_sqrt, surface_sqrt); Text("Texture Area: about %d px ~%dx%d px", font->MetricsTotalSurface, surface_sqrt, surface_sqrt);
for (int config_i = 0; config_i < font->ConfigDataCount; config_i++) for (int config_i = 0; config_i < font->ConfigDataCount; config_i++)

5
imgui_internal.h
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@ -322,9 +322,10 @@ static inline bool ImCharIsBlankA(char c) { return c == ' ' || c =
static inline bool ImCharIsBlankW(unsigned int c) { return c == ' ' || c == '\t' || c == 0x3000; } static inline bool ImCharIsBlankW(unsigned int c) { return c == ' ' || c == '\t' || c == 0x3000; }
// Helpers: UTF-8 <> wchar conversions // Helpers: UTF-8 <> wchar conversions
IMGUI_API int ImTextStrToUtf8(char* buf, int buf_size, const ImWchar* in_text, const ImWchar* in_text_end); // return output UTF-8 bytes count IMGUI_API const char* ImTextCharToUtf8(char out_buf[5], unsigned int c); // return out_buf
IMGUI_API int ImTextStrToUtf8(char* out_buf, int out_buf_size, const ImWchar* in_text, const ImWchar* in_text_end); // return output UTF-8 bytes count
IMGUI_API int ImTextCharFromUtf8(unsigned int* out_char, const char* in_text, const char* in_text_end); // read one character. return input UTF-8 bytes count IMGUI_API int ImTextCharFromUtf8(unsigned int* out_char, const char* in_text, const char* in_text_end); // read one character. return input UTF-8 bytes count
IMGUI_API int ImTextStrFromUtf8(ImWchar* buf, int buf_size, const char* in_text, const char* in_text_end, const char** in_remaining = NULL); // return input UTF-8 bytes count IMGUI_API int ImTextStrFromUtf8(ImWchar* out_buf, int out_buf_size, const char* in_text, const char* in_text_end, const char** in_remaining = NULL); // return input UTF-8 bytes count
IMGUI_API int ImTextCountCharsFromUtf8(const char* in_text, const char* in_text_end); // return number of UTF-8 code-points (NOT bytes count) IMGUI_API int ImTextCountCharsFromUtf8(const char* in_text, const char* in_text_end); // return number of UTF-8 code-points (NOT bytes count)
IMGUI_API int ImTextCountUtf8BytesFromChar(const char* in_text, const char* in_text_end); // return number of bytes to express one char in UTF-8 IMGUI_API int ImTextCountUtf8BytesFromChar(const char* in_text, const char* in_text_end); // return number of bytes to express one char in UTF-8
IMGUI_API int ImTextCountUtf8BytesFromStr(const ImWchar* in_text, const ImWchar* in_text_end); // return number of bytes to express string in UTF-8 IMGUI_API int ImTextCountUtf8BytesFromStr(const ImWchar* in_text, const ImWchar* in_text_end); // return number of bytes to express string in UTF-8