| |
| |
| |
| |
| """ |
| Functions related to keyboard layout. |
| """ |
|
|
| EN_TH_KEYB_PAIRS = { |
| "Z": "(", |
| "z": "ผ", |
| "X": ")", |
| "x": "ป", |
| "C": "ฉ", |
| "c": "แ", |
| "V": "ฮ", |
| "v": "อ", |
| "B": "\u0e3a", |
| "b": "\u0e34", |
| "N": "\u0e4c", |
| "n": "\u0e37", |
| "M": "?", |
| "m": "ท", |
| "<": "ฒ", |
| ",": "ม", |
| ">": "ฬ", |
| ".": "ใ", |
| "?": "ฦ", |
| "/": "ฝ", |
| "A": "ฤ", |
| "a": "ฟ", |
| "S": "ฆ", |
| "s": "ห", |
| "D": "ฏ", |
| "d": "ก", |
| "F": "โ", |
| "f": "ด", |
| "G": "ฌ", |
| "g": "เ", |
| "H": "\u0e47", |
| "h": "\u0e49", |
| "J": "\u0e4b", |
| "j": "\u0e48", |
| "K": "ษ", |
| "k": "า", |
| "L": "ศ", |
| "l": "ส", |
| ":": "ซ", |
| ";": "ว", |
| '"': ".", |
| "'": "ง", |
| "Q": "๐", |
| "q": "ๆ", |
| "W": '"', |
| "w": "ไ", |
| "E": "ฎ", |
| "e": "\u0e33", |
| "R": "ฑ", |
| "r": "พ", |
| "T": "ธ", |
| "t": "ะ", |
| "Y": "\u0e4d", |
| "y": "\u0e31", |
| "U": "\u0e4a", |
| "u": "\u0e35", |
| "I": "ณ", |
| "i": "ร", |
| "O": "ฯ", |
| "o": "น", |
| "P": "ญ", |
| "p": "ย", |
| "{": "ฐ", |
| "[": "บ", |
| "}": ",", |
| "]": "ล", |
| "|": "ฅ", |
| "\\": "ฃ", |
| "~": "%", |
| "`": "_", |
| "@": "๑", |
| "2": "/", |
| "#": "๒", |
| "3": "-", |
| "$": "๓", |
| "4": "ภ", |
| "%": "๔", |
| "5": "ถ", |
| "^": "\u0e39", |
| "6": "\u0e38", |
| "&": "฿", |
| "7": "\u0e36", |
| "*": "๕", |
| "8": "ค", |
| "(": "๖", |
| "9": "ต", |
| ")": "๗", |
| "0": "จ", |
| "_": "๘", |
| "-": "ข", |
| "+": "๙", |
| "=": "ช", |
| } |
|
|
| TH_EN_KEYB_PAIRS = {v: k for k, v in EN_TH_KEYB_PAIRS.items()} |
|
|
| EN_TH_TRANSLATE_TABLE = str.maketrans(EN_TH_KEYB_PAIRS) |
| TH_EN_TRANSLATE_TABLE = str.maketrans(TH_EN_KEYB_PAIRS) |
|
|
| TIS_820_2531_MOD = [ |
| ["-", "ๅ", "/", "", "_", "ภ", "ถ", "ุ", "ึ", "ค", "ต", "จ", "ข", "ช"], |
| ["ๆ", "ไ", "ำ", "พ", "ะ", "ั", "ี", "ร", "น", "ย", "บ", "ล", "ฃ"], |
| ["ฟ", "ห", "ก", "ด", "เ", "้", "่", "า", "ส", "ว", "ง"], |
| ["ผ", "ป", "แ", "อ", "ิ", "ื", "ท", "ม", "ใ", "ฝ"], |
| ] |
| TIS_820_2531_MOD_SHIFT = [ |
| ["%", "+", "๑", "๒", "๓", "๔", "ู", "฿", "๕", "๖", "๗", "๘", "๙"], |
| ["๐", '"', "ฎ", "ฑ", "ธ", "ํ", "๊", "ณ", "ฯ", "ญ", "ฐ", ",", "ฅ"], |
| ["ฤ", "ฆ", "ฏ", "โ", "ฌ", "็", "๋", "ษ", "ศ", "ซ", "."], |
| ["(", ")", "ฉ", "ฮ", "ฺ", "์", "?", "ฒ", "ฬ", "ฦ"], |
| ] |
|
|
|
|
| def eng_to_thai(text: str) -> str: |
| """ |
| Corrects the given text that was incorrectly typed using English-US |
| Qwerty keyboard layout to the originally intended keyboard layout |
| that is the Thai Kedmanee keyboard. |
| |
| :param str text: incorrect text input (Thai typed using English keyboard) |
| :return: Thai text with typing using |
| incorrect keyboard layout is corrected |
| :rtype: str |
| |
| :Example: |
| |
| Intentionally type "ธนาคารแห่งประเทศไทย", but got "Tok8kicsj'xitgmLwmp":: |
| |
| from pythainlp.util import eng_to_thai |
| |
| eng_to_thai("Tok8kicsj'xitgmLwmp") |
| # output: ธนาคารแห่งประเทศไทย |
| """ |
| return text.translate(EN_TH_TRANSLATE_TABLE) |
|
|
|
|
| def thai_to_eng(text: str) -> str: |
| """ |
| Corrects the given text that was incorrectly typed using Thai Kedmanee |
| keyboard layout to the originally intended keyboard layout |
| that is the English-US Qwerty keyboard. |
| |
| :param str text: incorrect text input (English typed using Thai keyboard) |
| :return: English text with typing with |
| incorrect keyboard layout is corrected |
| :rtype: str |
| |
| :Example: |
| |
| Intentionally type "Bank of Thailand", but got "ฺฟืา นด ธ้ฟรสฟืก":: |
| |
| from pythainlp.util import eng_to_thai |
| |
| thai_to_eng("ฺฟืา นด ธ้ฟรสฟืก") |
| # output: 'Bank of Thailand' |
| """ |
| return text.translate(TH_EN_TRANSLATE_TABLE) |
|
|
|
|
| def thai_keyboard_dist(c1: str, c2: str, shift_dist: float = 0.0) -> float: |
| """ |
| Calculate Euclidean distance between two Thai characters |
| according to their location on a Thai keyboard layout. |
| |
| A modified TIS 820-2531 standard keyboard layout, which is developed |
| from Kedmanee layout and is the most commonly used Thai keyboard layout, |
| is used in distance calculation. |
| |
| The modified TIS 820-2531 is TIS 820-2531 with few key extensions |
| proposed in TIS 820-2536 draft. See Figure 4, notice grey keys, in |
| https://www.nectec.or.th/it-standards/keyboard_layout/thai-key.html |
| |
| Noted that the latest TIS 820-2538 has slight changes in layout from |
| TIS 820-2531. See Figure 2, notice the Thai Baht sign and ฅ-ฃ pair, in |
| https://www.nectec.or.th/it-standards/std820/std820.html |
| Since TIS 820-2538 is not widely adopted by keyboard manufacturer, |
| this function uses the de facto standard modified TIS 820-2531 instead. |
| |
| :param str c1: first character |
| :param str c2: second character |
| :param str shift_dist: return value if they're shifted |
| :return: Euclidean distance between two characters |
| :rtype: float |
| |
| :Example: |
| |
| from pythainlp.util import thai_keyboard_dist |
| thai_keyboard_dist("ด", "ะ") |
| # output: 1.4142135623730951 |
| thai_keyboard_dist("ฟ", "ฤ") |
| # output: 0.0 |
| thai_keyboard_dist("ฟ", "ห") |
| # output: 1.0 |
| thai_keyboard_dist("ฟ", "ก") |
| # output: 2.0 |
| thai_keyboard_dist("ฟ", "ฤ", 0.5) |
| # output: 0.5 |
| """ |
|
|
| def get_char_coord( |
| ch: str, layouts=[TIS_820_2531_MOD, TIS_820_2531_MOD_SHIFT] |
| ): |
| for layout in layouts: |
| for row in layout: |
| if ch in row: |
| r = layout.index(row) |
| c = row.index(ch) |
| return (r, c) |
| raise ValueError(ch + " not found in given keyboard layout") |
|
|
| coord1 = get_char_coord(c1) |
| coord2 = get_char_coord(c2) |
| distance = ( |
| (coord1[0] - coord2[0]) ** 2 + (coord1[1] - coord2[1]) ** 2 |
| ) ** (0.5) |
| if distance == 0 and c1 != c2: |
| return shift_dist |
| return distance |
|
|
