File: base_mixin.ts

package info (click to toggle)
chromium 138.0.7204.157-1
  • links: PTS, VCS
  • area: main
  • in suites: trixie
  • size: 6,071,864 kB
  • sloc: cpp: 34,936,859; ansic: 7,176,967; javascript: 4,110,704; python: 1,419,953; asm: 946,768; xml: 739,967; pascal: 187,324; sh: 89,623; perl: 88,663; objc: 79,944; sql: 50,304; cs: 41,786; fortran: 24,137; makefile: 21,806; php: 13,980; tcl: 13,166; yacc: 8,925; ruby: 7,485; awk: 3,720; lisp: 3,096; lex: 1,327; ada: 727; jsp: 228; sed: 36
file content (37 lines) | stat: -rw-r--r-- 1,311 bytes parent folder | download | duplicates (4) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
 
// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

/**
 * @fileoverview Provides a couple of helper methods used by several Polymer
 * elements. This is needed for pages that contain <settings-subpage> to
 * populate the |associatedControl| field for search settings using the `$$()`
 * helper.
 */

import type {PolymerElement} from 'chrome://resources/polymer/v3_0/polymer/polymer_bundled.min.js';
import {dedupingMixin} from 'chrome://resources/polymer/v3_0/polymer/polymer_bundled.min.js';

type Constructor<T> = new (...args: any[]) => T;

export interface BaseMixinInterface {
  $$<E extends Element = Element>(query: string): E|null;
  fire(eventName: string, detail?: any): void;
}

export const BaseMixin = dedupingMixin(
    <T extends Constructor<PolymerElement>>(superClass: T): T&
    Constructor<BaseMixinInterface> => {
      class BaseMixin extends superClass {
        $$<E extends Element = Element>(query: string) {
          return this.shadowRoot!.querySelector<E>(query);
        }

        fire(eventName: string, detail?: any) {
          this.dispatchEvent(new CustomEvent(
              eventName, {bubbles: true, composed: true, detail}));
        }
      }

      return BaseMixin;
    });