in src/core/input/Keyboard.ts [39:357]
export function evaluateKeyboardEvent(
ev: IKeyboardEvent,
applicationCursorMode: boolean,
isMac: boolean,
macOptionIsMeta: boolean
): IKeyboardResult {
const result: IKeyboardResult = {
type: KeyboardResultType.SEND_KEY,
// Whether to cancel event propogation (NOTE: this may not be needed since the event is
// canceled at the end of keyDown
cancel: false,
// The new key even to emit
key: undefined
};
const modifiers = (ev.shiftKey ? 1 : 0) | (ev.altKey ? 2 : 0) | (ev.ctrlKey ? 4 : 0) | (ev.metaKey ? 8 : 0);
switch (ev.keyCode) {
case 0:
if (ev.key === 'UIKeyInputUpArrow') {
if (applicationCursorMode) {
result.key = C0.ESC + 'OA';
} else {
result.key = C0.ESC + '[A';
}
}
else if (ev.key === 'UIKeyInputLeftArrow') {
if (applicationCursorMode) {
result.key = C0.ESC + 'OD';
} else {
result.key = C0.ESC + '[D';
}
}
else if (ev.key === 'UIKeyInputRightArrow') {
if (applicationCursorMode) {
result.key = C0.ESC + 'OC';
} else {
result.key = C0.ESC + '[C';
}
}
else if (ev.key === 'UIKeyInputDownArrow') {
if (applicationCursorMode) {
result.key = C0.ESC + 'OB';
} else {
result.key = C0.ESC + '[B';
}
}
break;
case 8:
// backspace
if (ev.shiftKey) {
result.key = C0.BS; // ^H
break;
} else if (ev.altKey) {
result.key = C0.ESC + C0.DEL; // \e ^?
break;
}
result.key = C0.DEL; // ^?
break;
case 9:
// tab
if (ev.shiftKey) {
result.key = C0.ESC + '[Z';
break;
}
result.key = C0.HT;
result.cancel = true;
break;
case 13:
// return/enter
result.key = C0.CR;
result.cancel = true;
break;
case 27:
// escape
result.key = C0.ESC;
result.cancel = true;
break;
case 37:
// left-arrow
if (modifiers) {
result.key = C0.ESC + '[1;' + (modifiers + 1) + 'D';
// HACK: Make Alt + left-arrow behave like Ctrl + left-arrow: move one word backwards
// http://unix.stackexchange.com/a/108106
// macOS uses different escape sequences than linux
if (result.key === C0.ESC + '[1;3D') {
result.key = isMac ? C0.ESC + 'b' : C0.ESC + '[1;5D';
}
} else if (applicationCursorMode) {
result.key = C0.ESC + 'OD';
} else {
result.key = C0.ESC + '[D';
}
break;
case 39:
// right-arrow
if (modifiers) {
result.key = C0.ESC + '[1;' + (modifiers + 1) + 'C';
// HACK: Make Alt + right-arrow behave like Ctrl + right-arrow: move one word forward
// http://unix.stackexchange.com/a/108106
// macOS uses different escape sequences than linux
if (result.key === C0.ESC + '[1;3C') {
result.key = isMac ? C0.ESC + 'f' : C0.ESC + '[1;5C';
}
} else if (applicationCursorMode) {
result.key = C0.ESC + 'OC';
} else {
result.key = C0.ESC + '[C';
}
break;
case 38:
// up-arrow
if (modifiers) {
result.key = C0.ESC + '[1;' + (modifiers + 1) + 'A';
// HACK: Make Alt + up-arrow behave like Ctrl + up-arrow
// http://unix.stackexchange.com/a/108106
if (result.key === C0.ESC + '[1;3A') {
result.key = C0.ESC + '[1;5A';
}
} else if (applicationCursorMode) {
result.key = C0.ESC + 'OA';
} else {
result.key = C0.ESC + '[A';
}
break;
case 40:
// down-arrow
if (modifiers) {
result.key = C0.ESC + '[1;' + (modifiers + 1) + 'B';
// HACK: Make Alt + down-arrow behave like Ctrl + down-arrow
// http://unix.stackexchange.com/a/108106
if (result.key === C0.ESC + '[1;3B') {
result.key = C0.ESC + '[1;5B';
}
} else if (applicationCursorMode) {
result.key = C0.ESC + 'OB';
} else {
result.key = C0.ESC + '[B';
}
break;
case 45:
// insert
if (!ev.shiftKey && !ev.ctrlKey) {
// <Ctrl> or <Shift> + <Insert> are used to
// copy-paste on some systems.
result.key = C0.ESC + '[2~';
}
break;
case 46:
// delete
if (modifiers) {
result.key = C0.ESC + '[3;' + (modifiers + 1) + '~';
} else {
result.key = C0.ESC + '[3~';
}
break;
case 36:
// home
if (modifiers) {
result.key = C0.ESC + '[1;' + (modifiers + 1) + 'H';
} else if (applicationCursorMode) {
result.key = C0.ESC + 'OH';
} else {
result.key = C0.ESC + '[H';
}
break;
case 35:
// end
if (modifiers) {
result.key = C0.ESC + '[1;' + (modifiers + 1) + 'F';
} else if (applicationCursorMode) {
result.key = C0.ESC + 'OF';
} else {
result.key = C0.ESC + '[F';
}
break;
case 33:
// page up
if (ev.shiftKey) {
result.type = KeyboardResultType.PAGE_UP;
} else {
result.key = C0.ESC + '[5~';
}
break;
case 34:
// page down
if (ev.shiftKey) {
result.type = KeyboardResultType.PAGE_DOWN;
} else {
result.key = C0.ESC + '[6~';
}
break;
case 112:
// F1-F12
if (modifiers) {
result.key = C0.ESC + '[1;' + (modifiers + 1) + 'P';
} else {
result.key = C0.ESC + 'OP';
}
break;
case 113:
if (modifiers) {
result.key = C0.ESC + '[1;' + (modifiers + 1) + 'Q';
} else {
result.key = C0.ESC + 'OQ';
}
break;
case 114:
if (modifiers) {
result.key = C0.ESC + '[1;' + (modifiers + 1) + 'R';
} else {
result.key = C0.ESC + 'OR';
}
break;
case 115:
if (modifiers) {
result.key = C0.ESC + '[1;' + (modifiers + 1) + 'S';
} else {
result.key = C0.ESC + 'OS';
}
break;
case 116:
if (modifiers) {
result.key = C0.ESC + '[15;' + (modifiers + 1) + '~';
} else {
result.key = C0.ESC + '[15~';
}
break;
case 117:
if (modifiers) {
result.key = C0.ESC + '[17;' + (modifiers + 1) + '~';
} else {
result.key = C0.ESC + '[17~';
}
break;
case 118:
if (modifiers) {
result.key = C0.ESC + '[18;' + (modifiers + 1) + '~';
} else {
result.key = C0.ESC + '[18~';
}
break;
case 119:
if (modifiers) {
result.key = C0.ESC + '[19;' + (modifiers + 1) + '~';
} else {
result.key = C0.ESC + '[19~';
}
break;
case 120:
if (modifiers) {
result.key = C0.ESC + '[20;' + (modifiers + 1) + '~';
} else {
result.key = C0.ESC + '[20~';
}
break;
case 121:
if (modifiers) {
result.key = C0.ESC + '[21;' + (modifiers + 1) + '~';
} else {
result.key = C0.ESC + '[21~';
}
break;
case 122:
if (modifiers) {
result.key = C0.ESC + '[23;' + (modifiers + 1) + '~';
} else {
result.key = C0.ESC + '[23~';
}
break;
case 123:
if (modifiers) {
result.key = C0.ESC + '[24;' + (modifiers + 1) + '~';
} else {
result.key = C0.ESC + '[24~';
}
break;
default:
// a-z and space
if (ev.ctrlKey && !ev.shiftKey && !ev.altKey && !ev.metaKey) {
if (ev.keyCode >= 65 && ev.keyCode <= 90) {
result.key = String.fromCharCode(ev.keyCode - 64);
} else if (ev.keyCode === 32) {
// NUL
result.key = String.fromCharCode(0);
} else if (ev.keyCode >= 51 && ev.keyCode <= 55) {
// escape, file sep, group sep, record sep, unit sep
result.key = String.fromCharCode(ev.keyCode - 51 + 27);
} else if (ev.keyCode === 56) {
// delete
result.key = String.fromCharCode(127);
} else if (ev.keyCode === 219) {
// ^[ - Control Sequence Introducer (CSI)
result.key = String.fromCharCode(27);
} else if (ev.keyCode === 220) {
// ^\ - String Terminator (ST)
result.key = String.fromCharCode(28);
} else if (ev.keyCode === 221) {
// ^] - Operating System Command (OSC)
result.key = String.fromCharCode(29);
}
} else if ((!isMac || macOptionIsMeta) && ev.altKey && !ev.metaKey) {
// On macOS this is a third level shift when !macOptionIsMeta. Use <Esc> instead.
const keyMapping = KEYCODE_KEY_MAPPINGS[ev.keyCode];
const key = keyMapping && keyMapping[!ev.shiftKey ? 0 : 1];
if (key) {
result.key = C0.ESC + key;
} else if (ev.keyCode >= 65 && ev.keyCode <= 90) {
const keyCode = ev.ctrlKey ? ev.keyCode - 64 : ev.keyCode + 32;
result.key = C0.ESC + String.fromCharCode(keyCode);
}
} else if (isMac && !ev.altKey && !ev.ctrlKey && ev.metaKey) {
if (ev.keyCode === 65) { // cmd + a
result.type = KeyboardResultType.SELECT_ALL;
}
}
break;
}
return result;
}