molstar
Version:
A comprehensive macromolecular library.
81 lines (80 loc) • 2.43 kB
JavaScript
;
/**
* Copyright (c) 2018 mol* contributors, licensed under MIT, See LICENSE file for more info.
*
* @author David Sehnal <david.sehnal@gmail.com>
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.PluginCommandManager = void 0;
exports.PluginCommand = PluginCommand;
const mol_util_1 = require("../mol-util");
function PluginCommand() {
const ret = ((ctx, params) => ctx.commands.dispatch(ret, params || {}));
ret.subscribe = (ctx, action) => ctx.commands.subscribe(ret, action);
ret.id = mol_util_1.UUID.create22();
return ret;
}
class PluginCommandManager {
constructor() {
this.subs = new Map();
this.disposing = false;
}
subscribe(cmd, action) {
let actions = this.subs.get(cmd.id);
if (!actions) {
actions = [];
this.subs.set(cmd.id, actions);
}
actions.push(action);
return {
unsubscribe: () => {
const actions = this.subs.get(cmd.id);
if (!actions)
return;
const idx = actions.indexOf(action);
if (idx < 0)
return;
for (let i = idx + 1; i < actions.length; i++) {
actions[i - 1] = actions[i];
}
actions.pop();
}
};
}
/** Resolves after all actions have completed */
dispatch(cmd, params) {
return new Promise((resolve, reject) => {
if (this.disposing) {
reject('disposed');
return;
}
const actions = this.subs.get(cmd.id);
if (!actions) {
resolve();
return;
}
this.resolve({ cmd, params, resolve, reject });
});
}
dispose() {
this.subs.clear();
}
async resolve(instance) {
const actions = this.subs.get(instance.cmd.id);
if (!actions) {
instance.resolve();
return;
}
try {
// TODO: should actions be called "asynchronously" ("setImmediate") instead?
for (const a of actions) {
await a(instance.params);
}
instance.resolve();
}
catch (e) {
instance.reject(e);
}
}
}
exports.PluginCommandManager = PluginCommandManager;