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Diffstat (limited to 'src/ui/text_input.h')
| -rw-r--r-- | src/ui/text_input.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/src/ui/text_input.h b/src/ui/text_input.h new file mode 100644 index 0000000..8dc416f --- /dev/null +++ b/src/ui/text_input.h | |||
| @@ -0,0 +1,85 @@ | |||
| 1 | /* | ||
| 2 | This file is part of GNUnet. | ||
| 3 | Copyright (C) 2022 GNUnet e.V. | ||
| 4 | |||
| 5 | GNUnet is free software: you can redistribute it and/or modify it | ||
| 6 | under the terms of the GNU Affero General Public License as published | ||
| 7 | by the Free Software Foundation, either version 3 of the License, | ||
| 8 | or (at your option) any later version. | ||
| 9 | |||
| 10 | GNUnet is distributed in the hope that it will be useful, but | ||
| 11 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 13 | Affero General Public License for more details. | ||
| 14 | |||
| 15 | You should have received a copy of the GNU Affero General Public License | ||
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| 17 | |||
| 18 | SPDX-License-Identifier: AGPL3.0-or-later | ||
| 19 | */ | ||
| 20 | /* | ||
| 21 | * @author Tobias Frisch | ||
| 22 | * @file ui/text_input.h | ||
| 23 | */ | ||
| 24 | |||
| 25 | #ifndef UI_TEXT_INPUT_H_ | ||
| 26 | #define UI_TEXT_INPUT_H_ | ||
| 27 | |||
| 28 | #include <ctype.h> | ||
| 29 | |||
| 30 | #define text_input_event(text, key) { \ | ||
| 31 | switch (key) \ | ||
| 32 | { \ | ||
| 33 | case KEY_LEFT: \ | ||
| 34 | { \ | ||
| 35 | text##_pos--; \ | ||
| 36 | break; \ | ||
| 37 | } \ | ||
| 38 | case KEY_RIGHT: \ | ||
| 39 | { \ | ||
| 40 | text##_pos++; \ | ||
| 41 | break; \ | ||
| 42 | } \ | ||
| 43 | case KEY_BACKSPACE: \ | ||
| 44 | { \ | ||
| 45 | if ((text##_pos < text##_len) && (text##_pos > 0)) \ | ||
| 46 | for (int i = text##_pos; i < text##_len; i++) \ | ||
| 47 | text[i - 1] = text[i]; \ | ||
| 48 | \ | ||
| 49 | if ((text##_pos > 0) && (text##_len > 0)) \ | ||
| 50 | { \ | ||
| 51 | text##_pos--; \ | ||
| 52 | text##_len--; \ | ||
| 53 | } \ | ||
| 54 | \ | ||
| 55 | break; \ | ||
| 56 | } \ | ||
| 57 | default: \ | ||
| 58 | { \ | ||
| 59 | if (!isprint(key)) \ | ||
| 60 | break; \ | ||
| 61 | \ | ||
| 62 | for (int i = text##_len - 1; i >= text##_pos; i--) \ | ||
| 63 | text[i + 1] = text[i]; \ | ||
| 64 | \ | ||
| 65 | text[text##_pos++] = (char) key; \ | ||
| 66 | text##_len++; \ | ||
| 67 | break; \ | ||
| 68 | } \ | ||
| 69 | } \ | ||
| 70 | \ | ||
| 71 | int max_len = (int) sizeof(text) - 1; \ | ||
| 72 | \ | ||
| 73 | if (text##_len > max_len) \ | ||
| 74 | text##_len = max_len; \ | ||
| 75 | \ | ||
| 76 | text[text##_len] = '\0'; \ | ||
| 77 | \ | ||
| 78 | if (text##_pos < 0) \ | ||
| 79 | text##_pos = 0; \ | ||
| 80 | \ | ||
| 81 | if (text##_pos > text##_len) \ | ||
| 82 | text##_pos = text##_len; \ | ||
| 83 | } | ||
| 84 | |||
| 85 | #endif /* UI_TEXT_INPUT_H_ */ | ||