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216 lines
5.2 KiB
216 lines
5.2 KiB
'use strict';
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import { commands, Disposable } from 'vscode';
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import { ContextKeys, extensionId, setContext } from './constants';
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import { Logger } from './logger';
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import { log } from './system';
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export declare interface KeyCommand {
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onDidPressKey?(key: Keys): void | Promise<void>;
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}
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const keyNoopCommand = Object.create(null) as KeyCommand;
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export { keyNoopCommand as KeyNoopCommand };
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export const keys = [
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'left',
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'alt+left',
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'ctrl+left',
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'right',
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'alt+right',
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'ctrl+right',
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'alt+,',
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'alt+.',
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'escape',
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] as const;
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export type Keys = typeof keys[number];
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export type KeyMapping = { [K in Keys]?: KeyCommand | (() => Promise<KeyCommand>) };
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type IndexableKeyMapping = KeyMapping & {
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[index: string]: KeyCommand | (() => Promise<KeyCommand>) | undefined;
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};
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const mappings: KeyMapping[] = [];
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export class KeyboardScope implements Disposable {
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private readonly _mapping: IndexableKeyMapping;
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constructor(mapping: KeyMapping) {
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this._mapping = mapping;
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for (const key in this._mapping) {
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this._mapping[key] = this._mapping[key] ?? keyNoopCommand;
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}
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mappings.push(this._mapping);
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}
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@log({
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args: false,
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prefix: context => `${context.prefix}[${mappings.length}]`,
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})
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async dispose() {
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const index = mappings.indexOf(this._mapping);
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const cc = Logger.getCorrelationContext();
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if (cc != null) {
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cc.exitDetails = ` \u2022 index=${index}`;
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}
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if (index === mappings.length - 1) {
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mappings.pop();
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await this.updateKeyCommandsContext(mappings[mappings.length - 1]);
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} else {
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mappings.splice(index, 1);
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}
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}
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private _paused = true;
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get paused() {
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return this._paused;
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}
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@log<KeyboardScope['clearKeyCommand']>({
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args: false,
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prefix: (context, key) => `${context.prefix}[${mappings.length}](${key})`,
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})
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async clearKeyCommand(key: Keys) {
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const cc = Logger.getCorrelationContext();
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const mapping = mappings[mappings.length - 1];
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if (mapping !== this._mapping || mapping[key] == null) {
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if (cc != null) {
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cc.exitDetails = ' \u2022 skipped';
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}
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return;
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}
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mapping[key] = undefined;
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await setContext(`${ContextKeys.Key}:${key}`, false);
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}
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@log({
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args: false,
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prefix: context => `${context.prefix}(paused=${context.instance._paused})`,
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})
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async pause(keys?: Keys[]) {
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if (this._paused) return;
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this._paused = true;
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const mapping = (Object.keys(this._mapping) as Keys[]).reduce((accumulator, key) => {
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accumulator[key] = keys == null || keys.includes(key) ? undefined : this._mapping[key];
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return accumulator;
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}, Object.create(null) as KeyMapping);
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await this.updateKeyCommandsContext(mapping);
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}
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@log({
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args: false,
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prefix: context => `${context.prefix}(paused=${context.instance._paused})`,
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})
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async resume() {
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if (!this._paused) return;
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this._paused = false;
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await this.updateKeyCommandsContext(this._mapping);
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}
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async start() {
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await this.resume();
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}
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@log<KeyboardScope['setKeyCommand']>({
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args: false,
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prefix: (context, key) => `${context.prefix}[${mappings.length}](${key})`,
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})
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async setKeyCommand(key: Keys, command: KeyCommand | (() => Promise<KeyCommand>)) {
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const cc = Logger.getCorrelationContext();
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const mapping = mappings[mappings.length - 1];
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if (mapping !== this._mapping) {
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if (cc != null) {
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cc.exitDetails = ' \u2022 skipped';
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}
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return;
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}
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const set = Boolean(mapping[key]);
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mapping[key] = command;
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if (!set) {
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await setContext(`${ContextKeys.Key}:${key}`, true);
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}
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}
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private async updateKeyCommandsContext(mapping: KeyMapping) {
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await Promise.all(keys.map(key => setContext(`${ContextKeys.Key}:${key}`, Boolean(mapping?.[key]))));
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}
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}
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export class Keyboard implements Disposable {
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private readonly _disposable: Disposable;
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constructor() {
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const subscriptions = keys.map(key =>
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commands.registerCommand(`${extensionId}.key.${key}`, () => this.execute(key), this),
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);
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this._disposable = Disposable.from(...subscriptions);
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}
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dispose() {
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this._disposable.dispose();
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}
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@log<Keyboard['createScope']>({
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args: false,
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prefix: (context, mapping) =>
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`${context.prefix}[${mappings.length}](${mapping === undefined ? '' : Object.keys(mapping).join(',')})`,
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})
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createScope(mapping?: KeyMapping): KeyboardScope {
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return new KeyboardScope({ ...mapping });
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}
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@log<Keyboard['beginScope']>({
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args: false,
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prefix: (context, mapping) =>
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`${context.prefix}[${mappings.length}](${mapping === undefined ? '' : Object.keys(mapping).join(',')})`,
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})
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async beginScope(mapping?: KeyMapping): Promise<KeyboardScope> {
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const scope = this.createScope(mapping);
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await scope.start();
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return scope;
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}
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@log()
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async execute(key: Keys): Promise<void> {
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const cc = Logger.getCorrelationContext();
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if (!mappings.length) {
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if (cc != null) {
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cc.exitDetails = ' \u2022 skipped, no mappings';
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}
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return;
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}
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try {
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const mapping = mappings[mappings.length - 1];
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let command = mapping[key] as KeyCommand | (() => Promise<KeyCommand>);
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if (typeof command === 'function') {
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command = await command();
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}
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if (typeof command?.onDidPressKey !== 'function') {
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if (cc != null) {
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cc.exitDetails = ' \u2022 skipped, no callback';
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}
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return;
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}
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void (await command.onDidPressKey(key));
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} catch (ex) {
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Logger.error(ex, cc);
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}
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}
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}
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