Function is_word_boundary_from_left

KBotExt/imgui/imgui_widgets.cpp:3727–3737

		return ((prev_white || prev_separ) && !(curr_separ || curr_white)) || (curr_separ && !prev_separ);
	}
	static int is_word_boundary_from_left(ImGuiInputTextState* obj, int idx)
	{
		if ((obj->Flags & ImGuiInputTextFlags_Password) || idx <= 0)
			return 0;

		bool prev_white = ImCharIsBlankW(obj->TextW[idx]);
		bool prev_separ = is_separator(obj->TextW[idx]);
		bool curr_white = ImCharIsBlankW(obj->TextW[idx - 1]);
		bool curr_separ = is_separator(obj->TextW[idx - 1]);
		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->CurLenW; 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->CurLenW; while (idx < len && !is_word_boundary_from_right(obj, idx)) idx++; return idx > len ? len : idx; }