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import Key from '../../shared/settings/Key';
export default class KeySequence {
constructor(
public readonly keys: Key[],
) {
}
push(key: Key): number {
return this.keys.push(key);
}
length(): number {
return this.keys.length;
}
startsWith(o: KeySequence): boolean {
if (this.keys.length < o.keys.length) {
return false;
}
for (let i = 0; i < o.keys.length; ++i) {
if (!this.keys[i].equals(o.keys[i])) {
return false;
}
}
return true;
}
isDigitOnly(): boolean {
return this.keys.every(key => key.isDigit());
}
repeatCount(): number {
let nonDigitAt = this.keys.findIndex(key => !key.isDigit());
if (this.keys.length === 0 || nonDigitAt === 0) {
return 1;
}
if (nonDigitAt === -1) {
nonDigitAt = this.keys.length;
}
const digits = this.keys.slice(0, nonDigitAt)
.map(key => key.key)
.join('');
return Number(digits);
}
trimNumericPrefix(): KeySequence {
let nonDigitAt = this.keys.findIndex(key => !key.isDigit());
if (nonDigitAt === -1) {
nonDigitAt = this.keys.length;
}
return new KeySequence(this.keys.slice(nonDigitAt));
}
splitNumericPrefix(): [KeySequence, KeySequence] {
const nonDigitIndex = this.keys.findIndex(key => !key.isDigit());
if (nonDigitIndex === -1) {
return [this, new KeySequence([])];
}
return [
new KeySequence(this.keys.slice(0, nonDigitIndex)),
new KeySequence(this.keys.slice(nonDigitIndex)),
];
}
static fromMapKeys(keys: string): KeySequence {
const fromMapKeysRecursive = (
remaining: string, mappedKeys: Key[],
): Key[] => {
if (remaining.length === 0) {
return mappedKeys;
}
let nextPos = 1;
if (remaining.startsWith('<')) {
const ltPos = remaining.indexOf('>');
if (ltPos > 0) {
nextPos = ltPos + 1;
}
}
return fromMapKeysRecursive(
remaining.slice(nextPos),
mappedKeys.concat([Key.fromMapKey(remaining.slice(0, nextPos))])
);
};
const data = fromMapKeysRecursive(keys, []);
return new KeySequence(data);
}
}
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