asarfuckery/electronasar/ptb/renderer/callbacks-registry.js

'use strict';
const v8Util = process.electronBinding('v8_util');
class CallbacksRegistry {
    constructor() {
        this.nextId = 0;
        this.callbacks = {};
    }
    add(callback) {
        // The callback is already added.
        let id = v8Util.getHiddenValue(callback, 'callbackId');
        if (id != null)
            return id;
        id = this.nextId += 1;
        // Capture the location of the function and put it in the ID string,
        // so that release errors can be tracked down easily.
        const regexp = /at (.*)/gi;
        const stackString = (new Error()).stack;
        let filenameAndLine;
        let match;
        while ((match = regexp.exec(stackString)) !== null) {
            const location = match[1];
            if (location.includes('(native)'))
                continue;
            if (location.includes('(<anonymous>)'))
                continue;
            if (location.includes('electron.asar'))
                continue;
            const ref = /([^/^)]*)\)?$/gi.exec(location);
            filenameAndLine = ref[1];
            break;
        }
        this.callbacks[id] = callback;
        v8Util.setHiddenValue(callback, 'callbackId', id);
        v8Util.setHiddenValue(callback, 'location', filenameAndLine);
        return id;
    }
    get(id) {
        return this.callbacks[id] || function () { };
    }
    apply(id, ...args) {
        return this.get(id).apply(global, ...args);
    }
    remove(id) {
        const callback = this.callbacks[id];
        if (callback) {
            v8Util.deleteHiddenValue(callback, 'callbackId');
            delete this.callbacks[id];
        }
    }
}
module.exports = CallbacksRegistry;