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apple2js
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apple2js/js/components/util/keyboard.ts

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import { JSX } from 'preact';
import { byte, DeepMemberOf, KnownKeys } from '../../types';
import { debug, toHex } from '../../util';
/**
* Map of KeyboardEvent.keyCode to ASCII, for normal,
* shifted and control states.
*/
// keycode: [plain, ctrl, shift]
export const keymap = {
// Most of these won't happen
0x00: [0x00, 0x00, 0x00], //
0x01: [0x01, 0x01, 0x01], //
0x02: [0x02, 0x02, 0x02], //
0x03: [0x03, 0x03, 0x03], //
0x04: [0x04, 0x04, 0x04], //
0x05: [0x05, 0x05, 0x05], //
0x06: [0x06, 0x06, 0x06], //
0x07: [0x07, 0x07, 0x07], //
0x08: [0x7F, 0x7F, 0x7F], // BS/DELETE
0x09: [0x09, 0x09, 0x09], // TAB
0x0A: [0x0A, 0x0A, 0x0A], //
0x0B: [0x0B, 0x0B, 0x0B], //
0x0C: [0x0C, 0x0C, 0x0C], //
0x0D: [0x0D, 0x0D, 0x0D], // CR
0x0E: [0x0E, 0x0E, 0x0E], //
0x0F: [0x0F, 0x0F, 0x0F], //
0x10: [0xff, 0xff, 0xff], // SHIFT
0x11: [0xff, 0xff, 0xff], // CTRL
0x12: [0xff, 0xff, 0xff], // ALT/OPTION
0x13: [0x13, 0x13, 0x13], //
0x14: [0x14, 0x14, 0x14], //
0x15: [0x15, 0x15, 0x15], //
0x16: [0x16, 0x16, 0x16], //
0x17: [0x17, 0x17, 0x18], //
0x18: [0x18, 0x18, 0x18], //
0x19: [0x19, 0x19, 0x19], //
0x1A: [0x1A, 0x1A, 0x1A], //
0x1B: [0x1B, 0x1B, 0x1B], // ESC
0x1C: [0x1C, 0x1C, 0x1C], //
0x1D: [0x1D, 0x1D, 0x1D], //
0x1E: [0x1E, 0x1E, 0x1E], //
0x1F: [0x1F, 0x1F, 0x1F], //
// Most of these besides space won't happen
0x20: [0x20, 0x20, 0x20], //
0x21: [0x21, 0x21, 0x21], //
0x22: [0x22, 0x22, 0x22], //
0x23: [0x23, 0x23, 0x23], //
0x24: [0x24, 0x24, 0x24], //
0x25: [0x08, 0x08, 0x08], // <- left
0x26: [0x0B, 0x0B, 0x0B], // ^ up
0x27: [0x15, 0x15, 0x15], // -> right
0x28: [0x0A, 0x0A, 0x0A], // v down
0x29: [0x29, 0x29, 0x29], // )
0x2A: [0x2A, 0x2A, 0x2A], // *
0x2B: [0x2B, 0x2B, 0x2B], // +
0x2C: [0x2C, 0x2C, 0x3C], // , - <
0x2D: [0x2D, 0x2D, 0x5F], // - - _
0x2E: [0x2E, 0x2E, 0x3E], // . - >
0x2F: [0x2F, 0x2F, 0x3F], // / - ?
0x30: [0x30, 0x30, 0x29], // 0 - )
0x31: [0x31, 0x31, 0x21], // 1 - !
0x32: [0x32, 0x00, 0x40], // 2 - @
0x33: [0x33, 0x33, 0x23], // 3 - #
0x34: [0x34, 0x34, 0x24], // 4 - $
0x35: [0x35, 0x35, 0x25], // 5 - %
0x36: [0x36, 0x36, 0x5E], // 6 - ^
0x37: [0x37, 0x37, 0x26], // 7 - &
0x38: [0x38, 0x38, 0x2A], // 8 - *
0x39: [0x39, 0x39, 0x28], // 9 - (
0x3A: [0x3A, 0x3A, 0x3A], // :
0x3B: [0x3B, 0x3B, 0x3A], // ; - :
0x3C: [0x3C, 0x3C, 0x3C], // <
0x3D: [0x3D, 0x3D, 0x2B], // = - +
0x3E: [0x3E, 0x3E, 0x3E], // >
0x3F: [0x3F, 0x3F, 0x3F], // ?
// Alpha and control
0x40: [0x40, 0x00, 0x40], // @
0x41: [0x61, 0x01, 0x41], // A
0x42: [0x62, 0x02, 0x42], // B
0x43: [0x63, 0x03, 0x43], // C - BRK
0x44: [0x64, 0x04, 0x44], // D
0x45: [0x65, 0x05, 0x45], // E
0x46: [0x66, 0x06, 0x46], // F
0x47: [0x67, 0x07, 0x47], // G - BELL
0x48: [0x68, 0x08, 0x48], // H
0x49: [0x69, 0x09, 0x49], // I - TAB
0x4A: [0x6A, 0x0A, 0x4A], // J - NL
0x4B: [0x6B, 0x0B, 0x4B], // K - VT
0x4C: [0x6C, 0x0C, 0x4C], // L
0x4D: [0x6D, 0x0D, 0x4D], // M - CR
0x4E: [0x6E, 0x0E, 0x4E], // N
0x4F: [0x6F, 0x0F, 0x4F], // O
0x50: [0x70, 0x10, 0x50], // P
0x51: [0x71, 0x11, 0x51], // Q
0x52: [0x72, 0x12, 0x52], // R
0x53: [0x73, 0x13, 0x53], // S
0x54: [0x74, 0x14, 0x54], // T
0x55: [0x75, 0x15, 0x55], // U
0x56: [0x76, 0x16, 0x56], // V
0x57: [0x77, 0x17, 0x57], // W
0x58: [0x78, 0x18, 0x58], // X
0x59: [0x79, 0x19, 0x59], // Y
0x5A: [0x7A, 0x1A, 0x5A], // Z
0x5B: [0xFF, 0xFF, 0xFF], // Left window
0x5C: [0xFF, 0xFF, 0xFF], // Right window
0x5D: [0xFF, 0xFF, 0xFF], // Select
0x5E: [0x5E, 0x1E, 0x5E], //
0x5F: [0x5F, 0x1F, 0x5F], // _
// Numeric pad
0x60: [0x30, 0x30, 0x30], // 0
0x61: [0x31, 0x31, 0x31], // 1
0x62: [0x32, 0x32, 0x32], // 2
0x63: [0x33, 0x33, 0x33], // 3
0x64: [0x34, 0x34, 0x34], // 4
0x65: [0x35, 0x35, 0x35], // 5
0x66: [0x36, 0x36, 0x36], // 6
0x67: [0x37, 0x37, 0x37], // 7
0x68: [0x38, 0x38, 0x38], // 8
0x69: [0x39, 0x39, 0x39], // 9
0x6A: [0x2A, 0x2A, 0x2A], // *
0x6B: [0x2B, 0x2B, 0x2B], // +
0x6D: [0x2D, 0x2D, 0x2D], // -
0x6E: [0x2E, 0x2E, 0x2E], // .
0x6F: [0x2F, 0x2F, 0x39], // /
// Stray keys
0xAD: [0x2D, 0x2D, 0x5F], // - - _
0xBA: [0x3B, 0x3B, 0x3A], // ; - :
0xBB: [0x3D, 0x3D, 0x2B], // = - +
0xBC: [0x2C, 0x2C, 0x3C], // , - <
0xBD: [0x2D, 0x2D, 0x5F], // - - _
0xBE: [0x2E, 0x2E, 0x3E], // . - >
0xBF: [0x2F, 0x2F, 0x3F], // / - ?
0xC0: [0x60, 0x60, 0x7E], // ` - ~
0xDB: [0x5B, 0x1B, 0x7B], // [ - {
0xDC: [0x5C, 0x1C, 0x7C], // \ - |
0xDD: [0x5D, 0x1D, 0x7D], // ] - }
0xDE: [0x27, 0x22, 0x22], // ' - '
0xFF: [0xFF, 0xFF, 0xFF] // No comma line
} as const;
export const isKeyboardCode = (code: number): code is KnownKeys<typeof keymap> => {
return code in keymap;
};
const uiKitMap = {
'Dead': 0xFF,
'UIKeyInputLeftArrow': 0x08,
'UIKeyInputRightArrow': 0x15,
'UIKeyInputUpArrow': 0x0B,
'UIKeyInputDownArrow': 0x0A,
'UIKeyInputEscape': 0x1B
} as const;
export const isUiKitKey = (k: string): k is KnownKeys<typeof uiKitMap> => {
return k in uiKitMap;
};
/**
* Keyboard layout for the Apple ][ / ][+
*/
export const keys2 = [
[
['1', '2', '3', '4', '5', '6', '7', '8', '9', '0', ':', '-', 'RESET'],
['ESC', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', 'REPT', 'RETURN'],
['CTRL', 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ';', '&larr;', '&rarr;'],
['SHIFT', 'Z', 'X', 'C', 'V', 'B', 'N', 'M', ',', '.', '/', 'SHIFT'],
['POWER', '&nbsp;']
], [
['!', '"', '#', '$', '%', '&', '\'', '(', ')', '0', '*', '=', 'RESET'],
['ESC', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', '@', 'REPT', 'RETURN'],
['CTRL', 'A', 'S', 'D', 'F', 'BELL', 'H', 'J', 'K', 'L', '+', '&larr;', '&rarr;'],
['SHIFT', 'Z', 'X', 'C', 'V', 'B', '^', ']', '<', '>', '?', 'SHIFT'],
['POWER', '&nbsp;']
]
] as const;
export type Key2 = DeepMemberOf<typeof keys2>;
/**
* Keyboard layout for the Apple //e
*/
export const keys2e = [
[
['ESC', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=', 'DELETE'],
['TAB', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '[', ']', '\\'],
['CTRL', 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ';', '"', 'RETURN'],
['SHIFT', 'Z', 'X', 'C', 'V', 'B', 'N', 'M', ',', '.', '/', 'SHIFT'],
['LOCK', '`', 'POW', 'OPEN_APPLE', '&nbsp;', 'CLOSED_APPLE', '&larr;', '&rarr;', '&darr;', '&uarr;']
], [
['ESC', '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+', 'DELETE'],
['TAB', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '|'],
['CTRL', 'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '\'', 'RETURN'],
['SHIFT', 'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?', 'SHIFT'],
['CAPS', '~', 'POW', 'OPEN_APPLE', '&nbsp;', 'CLOSED_APPLE', '&larr;', '&rarr;', '&darr;', '&uarr;']
]
] as const;
export type Key2e = DeepMemberOf<typeof keys2e>;
export type Key = Key2 | Key2e;
export type KeyFunction = (key: KeyboardEvent) => void;
/**
* Convert a DOM keyboard event into an ASCII equivalent that
* an Apple // can recognize.
*
* @param evt Event to convert
* @param caps Caps Lock state
* @returns ASCII character
*/
export const mapKeyEvent = (evt: KeyboardEvent, caps: boolean) => {
// TODO(whscullin): Find replacement for deprecated keycode
const code = evt.keyCode;
let key: byte = 0xff;
if (isUiKitKey(evt.key)) {
key = uiKitMap[evt.key];
} else if (isKeyboardCode(code)) {
key = keymap[code][evt.shiftKey ? 2 : (evt.ctrlKey ? 1 : 0)];
if (caps && key >= 0x61 && key <= 0x7A) {
key -= 0x20;
}
} else {
debug(`Unhandled key = ${toHex(code)}`);
}
return key;
};
/**
* Convert a mouse event into an ASCII character based on the
* data attached to the target DOM element.
*
* @param event Event to convert
* @param shifted Shift key state
* @param controlled Control key state
* @param caps Caps Lock state
* @param e //e status
* @returns ASCII character
*/
export const mapMouseEvent = (
event: JSX.TargetedMouseEvent<HTMLElement>,
shifted: boolean,
controlled: boolean,
caps: boolean,
e: boolean,
) => {
const keyLabel = event.currentTarget?.dataset.key2 ?? '';
let key = event.currentTarget?.dataset[shifted ? 'key2' : 'key1'] ?? '';
let keyCode = 0xff;
switch (key) {
case 'BELL':
key = 'G';
break;
case 'RETURN':
key = '\r';
break;
case 'TAB':
key = '\t';
break;
case 'DELETE':
key = '\x7F';
break;
case '&larr;':
key = '\x08';
break;
case '&rarr;':
key = '\x15';
break;
case '&darr;':
key = '\x0A';
break;
case '&uarr;':
key = '\x0B';
break;
case '&nbsp;':
key = ' ';
break;
case 'ESC':
key = '\x1B';
break;
default:
break;
}
if (key.length === 1) {
if (controlled && key >= '@' && key <= '_') {
keyCode = key.charCodeAt(0) - 0x40;
} else if (
e && !shifted && !caps &&
key >= 'A' && key <= 'Z'
) {
keyCode = key.charCodeAt(0) + 0x20;
} else {
keyCode = key.charCodeAt(0);
}
}
return { keyCode, key, keyLabel };
};
/**
* Remap keys so that upper and lower are a tuple per row instead of
* separate rows
*
* @param inKeys keys2 or keys2e
* @returns Keys remapped
*/
export const keysAsTuples = (inKeys: typeof keys2e | typeof keys2): string[][][] => {
const rows = [];
for (let idx = 0; idx < inKeys[0].length; idx++) {
const upper = inKeys[0][idx];
const lower = inKeys[1][idx];
const keys = [];
for (let jdx = 0; jdx < upper.length; jdx++) {
keys.push([upper[jdx], lower[jdx]]);
}
rows.push(keys);
}
return rows;
};
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