Method _onkeydown

packages/main/src/StepInput.ts:696–747

(e: KeyboardEvent)

	}

	_onkeydown(e: KeyboardEvent) {
		let preventDefault = true;
		if (this.disabled || this.readonly) {
			return;
		}

		if (isEnter(e)) {
			this._onInputChange();
			return;
		}

		if (isUp(e)) {
			// step up
			this._modifyValue(this.step);
		} else if (isDown(e)) {
			// step down
			this._modifyValue(-this.step);
		} else if (isEscape(e)) {
			// return previous value
			if (this._previousValue === undefined) {
				this._previousValue = this.value;
			}
			this.value = this._previousValue;
			this.input.value = this.value.toFixed(this.valuePrecision);
		} else if (this.max !== undefined && (isPageUpShift(e) || isUpShiftCtrl(e))) {
			// step to max
			this._modifyValue(this.max - this.value);
		} else if (this.min !== undefined && (isPageDownShift(e) || isDownShiftCtrl(e))) {
			// step to min
			this._modifyValue(this.min - this.value);
		} else if (!isUpCtrl(e) && !isDownCtrl(e) && !isUpShift(e) && !isDownShift(e)) {
			preventDefault = false;
		}

		if (e.key && e.key.length !== 1) {
			return;
		}

		const caretPosition = this._getCaretPosition();
		const inputValue = this.innerInput.value;
		const typedValue = this._getValueOnkeyDown(e, inputValue, caretPosition!);
		const parsedValue = this._parseNumber(typedValue);
		const isValidTypedValue = this._isInputValueValid(typedValue, parsedValue);

		if (preventDefault || !isValidTypedValue) {
			e.preventDefault();
		}

		if (caretPosition === 0 && isMinus(e)) {
			this._updateValueAndValidate(parsedValue);
		}
	}

	_getCaretPosition() {
		return this.input.getDomRef()!.querySelector("input")!.selectionStart;