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InputText: amends: fixed next/prev word implementation. (#7925) 

+ replace IMSTB_TEXTEDIT_GETPREVCHARINDEX code with ImTextFindPreviousUtf8Codepoint().
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ocornut 2024-09-05 19:56:12 +02:00 committed by omar
parent e240bc151a
commit 3d1e593b5b
1 changed files with 42 additions and 49 deletions
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91
imgui_widgets.cpp
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@ -3911,6 +3911,25 @@ static void STB_TEXTEDIT_LAYOUTROW(StbTexteditRow* r, ImGuiInputTextState* ob
r->num_chars = (int)(text_remaining - (text + line_start_idx));
}
#define IMSTB_TEXTEDIT_GETNEXTCHARINDEX IMSTB_TEXTEDIT_GETNEXTCHARINDEX_IMPL
#define IMSTB_TEXTEDIT_GETPREVCHARINDEX IMSTB_TEXTEDIT_GETPREVCHARINDEX_IMPL
static int IMSTB_TEXTEDIT_GETNEXTCHARINDEX_IMPL(ImGuiInputTextState* obj, int idx)
{
if (idx >= obj->CurLenA)
return obj->CurLenA + 1;
unsigned int c;
return idx + ImTextCharFromUtf8(&c, obj->TextA.Data + idx, obj->TextA.Data + obj->TextA.Size);
}
static int IMSTB_TEXTEDIT_GETPREVCHARINDEX_IMPL(ImGuiInputTextState* obj, int idx)
{
if (idx <= 0)
return -1;
const char* p = ImTextFindPreviousUtf8Codepoint(obj->TextA.Data, obj->TextA.Data + idx);
return (int)(p - obj->TextA.Data);
}
static bool ImCharIsSeparatorW(unsigned int c)
{
static const unsigned int separator_list[] =
@ -3958,58 +3977,32 @@ static int is_word_boundary_from_left(ImGuiInputTextState* obj, int idx)
bool curr_separ = ImCharIsSeparatorW(curr_c);
return ((prev_white) && !(curr_separ || curr_white)) || (curr_separ && !prev_separ);
}
static int STB_TEXTEDIT_MOVEWORDLEFT_IMPL(ImGuiInputTextState* obj, int idx) { idx--; while (idx >= 0 && !is_word_boundary_from_right(obj, idx)) idx--; return idx < 0 ? 0 : idx; }
static int STB_TEXTEDIT_MOVEWORDRIGHT_MAC(ImGuiInputTextState* obj, int idx) { idx++; int len = obj->CurLenA; while (idx < len && !is_word_boundary_from_left(obj, idx)) idx++; return idx > len ? len : idx; }
static int STB_TEXTEDIT_MOVEWORDRIGHT_WIN(ImGuiInputTextState* obj, int idx) { idx++; int len = obj->CurLenA; while (idx < len && !is_word_boundary_from_right(obj, idx)) idx++; return idx > len ? len : idx; }
static int STB_TEXTEDIT_MOVEWORDLEFT_IMPL(ImGuiInputTextState* obj, int idx)
{
idx = IMSTB_TEXTEDIT_GETPREVCHARINDEX(obj, idx);
while (idx >= 0 && !is_word_boundary_from_right(obj, idx))
idx = IMSTB_TEXTEDIT_GETPREVCHARINDEX(obj, idx);
return idx < 0 ? 0 : idx;
}
static int STB_TEXTEDIT_MOVEWORDRIGHT_MAC(ImGuiInputTextState* obj, int idx)
{
int len = obj->CurLenA;
idx = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(obj, idx);
while (idx < len && !is_word_boundary_from_left(obj, idx))
idx = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(obj, idx);
return idx > len ? len : idx;
}
static int STB_TEXTEDIT_MOVEWORDRIGHT_WIN(ImGuiInputTextState* obj, int idx)
{
idx = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(obj, idx);
int len = obj->CurLenA;
while (idx < len && !is_word_boundary_from_right(obj, idx))
idx = IMSTB_TEXTEDIT_GETNEXTCHARINDEX(obj, idx);
return idx > len ? len : idx;
}
static int STB_TEXTEDIT_MOVEWORDRIGHT_IMPL(ImGuiInputTextState* obj, int idx) { ImGuiContext& g = *obj->Ctx; if (g.IO.ConfigMacOSXBehaviors) return STB_TEXTEDIT_MOVEWORDRIGHT_MAC(obj, idx); else return STB_TEXTEDIT_MOVEWORDRIGHT_WIN(obj, idx); }
#define STB_TEXTEDIT_MOVEWORDLEFT STB_TEXTEDIT_MOVEWORDLEFT_IMPL // They need to be #define for stb_textedit.h
#define STB_TEXTEDIT_MOVEWORDRIGHT STB_TEXTEDIT_MOVEWORDRIGHT_IMPL
#define IMSTB_TEXTEDIT_GETNEXTCHARINDEX IMSTB_TEXTEDIT_GETNEXTCHARINDEX_IMPL
#define IMSTB_TEXTEDIT_GETPREVCHARINDEX IMSTB_TEXTEDIT_GETPREVCHARINDEX_IMPL
static int IMSTB_TEXTEDIT_GETNEXTCHARINDEX_IMPL(ImGuiInputTextState* obj, int idx)
{
unsigned int c;
return idx + ImTextCharFromUtf8(&c, obj->TextA.Data + idx, obj->TextA.Data + obj->TextA.Size);
}
static int CountLeadingHighBits(unsigned char b)
{
for (int i = 0; i < (int)sizeof(b) * 8; i++)
{
bool set = (b >> (7 - i)) & 1;
if (!set)
return i;
}
return sizeof(b) * 8;
}
static int IMSTB_TEXTEDIT_GETPREVCHARINDEX_IMPL(ImGuiInputTextState* obj, int idx)
{
// Backwards check/count for UTF-8 multi byte sequence
int num_seq_bytes = 0;
for (int i = idx - 1; i >= 0; i -= 1)
{
bool is_seq_byte = (obj->TextA.Data[i] & 0x80) == 0x80 && (obj->TextA.Data[i] & 0x40) == 0;
num_seq_bytes += is_seq_byte;
if (!is_seq_byte)
{
if (num_seq_bytes > 0)
{
char initial_byte = obj->TextA.Data[i];
char num_leading_bits = (char)CountLeadingHighBits(initial_byte);
bool is_multi_byte_seq = num_leading_bits == num_seq_bytes + 1;
if (is_multi_byte_seq)
{
return idx - (num_seq_bytes + 1);
}
}
break;
}
}
return idx - 1;
}
static void STB_TEXTEDIT_DELETECHARS(ImGuiInputTextState* obj, int pos, int n)
{