Return false to discard a character.
| 3867 | |
| 3868 | // Return false to discard a character. |
| 3869 | static bool InputTextFilterCharacter(unsigned int* p_char, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback, void* user_data, ImGuiInputSource input_source) |
| 3870 | { |
| 3871 | IM_ASSERT(input_source == ImGuiInputSource_Keyboard || input_source == ImGuiInputSource_Clipboard); |
| 3872 | unsigned int c = *p_char; |
| 3873 | |
| 3874 | // Filter non-printable (NB: isprint is unreliable! see #2467) |
| 3875 | bool apply_named_filters = true; |
| 3876 | if (c < 0x20) |
| 3877 | { |
| 3878 | bool pass = false; |
| 3879 | pass |= (c == '\n' && (flags & ImGuiInputTextFlags_Multiline)); |
| 3880 | pass |= (c == '\t' && (flags & ImGuiInputTextFlags_AllowTabInput)); |
| 3881 | if (!pass) |
| 3882 | return false; |
| 3883 | apply_named_filters = false; // Override named filters below so newline and tabs can still be inserted. |
| 3884 | } |
| 3885 | |
| 3886 | if (input_source != ImGuiInputSource_Clipboard) |
| 3887 | { |
| 3888 | // We ignore Ascii representation of delete (emitted from Backspace on OSX, see #2578, #2817) |
| 3889 | if (c == 127) |
| 3890 | return false; |
| 3891 | |
| 3892 | // Filter private Unicode range. GLFW on OSX seems to send private characters for special keys like arrow keys (FIXME) |
| 3893 | if (c >= 0xE000 && c <= 0xF8FF) |
| 3894 | return false; |
| 3895 | } |
| 3896 | |
| 3897 | // Filter Unicode ranges we are not handling in this build |
| 3898 | if (c > IM_UNICODE_CODEPOINT_MAX) |
| 3899 | return false; |
| 3900 | |
| 3901 | // Generic named filters |
| 3902 | if (apply_named_filters && (flags & (ImGuiInputTextFlags_CharsDecimal | ImGuiInputTextFlags_CharsHexadecimal | ImGuiInputTextFlags_CharsUppercase | ImGuiInputTextFlags_CharsNoBlank | ImGuiInputTextFlags_CharsScientific))) |
| 3903 | { |
| 3904 | // The libc allows overriding locale, with e.g. 'setlocale(LC_NUMERIC, "de_DE.UTF-8");' which affect the output/input of printf/scanf to use e.g. ',' instead of '.'. |
| 3905 | // The standard mandate that programs starts in the "C" locale where the decimal point is '.'. |
| 3906 | // We don't really intend to provide widespread support for it, but out of empathy for people stuck with using odd API, we support the bare minimum aka overriding the decimal point. |
| 3907 | // Change the default decimal_point with: |
| 3908 | // ImGui::GetCurrentContext()->PlatformLocaleDecimalPoint = *localeconv()->decimal_point; |
| 3909 | // Users of non-default decimal point (in particular ',') may be affected by word-selection logic (is_word_boundary_from_right/is_word_boundary_from_left) functions. |
| 3910 | ImGuiContext& g = *GImGui; |
| 3911 | const unsigned c_decimal_point = (unsigned int)g.PlatformLocaleDecimalPoint; |
| 3912 | |
| 3913 | // Allow 0-9 . - + * / |
| 3914 | if (flags & ImGuiInputTextFlags_CharsDecimal) |
| 3915 | if (!(c >= '0' && c <= '9') && (c != c_decimal_point) && (c != '-') && (c != '+') && (c != '*') && (c != '/')) |
| 3916 | return false; |
| 3917 | |
| 3918 | // Allow 0-9 . - + * / e E |
| 3919 | if (flags & ImGuiInputTextFlags_CharsScientific) |
| 3920 | if (!(c >= '0' && c <= '9') && (c != c_decimal_point) && (c != '-') && (c != '+') && (c != '*') && (c != '/') && (c != 'e') && (c != 'E')) |
| 3921 | return false; |
| 3922 | |
| 3923 | // Allow 0-9 a-F A-F |
| 3924 | if (flags & ImGuiInputTextFlags_CharsHexadecimal) |
| 3925 | if (!(c >= '0' && c <= '9') && !(c >= 'a' && c <= 'f') && !(c >= 'A' && c <= 'F')) |
| 3926 | return false; |
no test coverage detected