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ash / webui / scanning / resources / page_size_select.ts [blame]

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import './scan_settings_section.js';
import '/strings.m.js';

import {assert} from 'chrome://resources/ash/common/assert.js';
import {I18nMixin, I18nMixinInterface} from 'chrome://resources/ash/common/cr_elements/i18n_mixin.js';
import {PolymerElement} from 'chrome://resources/polymer/v3_0/polymer/polymer_bundled.min.js';

import {getTemplate} from './page_size_select.html.js';
import {PageSize} from './scanning.mojom-webui.js';
import {alphabeticalCompare, getPageSizeString} from './scanning_app_util.js';
import {AbstractConstructor, SelectMixin, SelectMixinInterface} from './select_mixin.js';

/** @type {PageSize} */
const DEFAULT_PAGE_SIZE = PageSize.kNaLetter;

/**
 * @fileoverview
 * 'page-size-select' displays the available page sizes in a dropdown.
 */

const PageSizeSelectElementBase = SelectMixin(I18nMixin(PolymerElement)) as
        AbstractConstructor<SelectMixinInterface<PageSize>>&
    {new (): PolymerElement & I18nMixinInterface};

export class PageSizeSelectElement extends PageSizeSelectElementBase {
  static get is() {
    return 'page-size-select' as const;
  }

  static get template() {
    return getTemplate();
  }

  override getOptionAtIndex(index: number): string {
    assert(index < this.options.length);

    return this.options[index].toString();
  }

  getPageSizeAsString(pageSize: PageSize): string {
    return getPageSizeString(pageSize);
  }

  override sortOptions(): void {
    this.options.sort((a: PageSize, b: PageSize) => {
      return alphabeticalCompare(getPageSizeString(a), getPageSizeString(b));
    });

    // If the fit to scan area option exists, move it to the end of the page
    // sizes array.
    const fitToScanAreaIndex =
        this.options.findIndex((pageSize: PageSize): boolean => {
          return pageSize === PageSize.kMax;
        });


    if (fitToScanAreaIndex !== -1) {
      this.options.push(this.options.splice(fitToScanAreaIndex, 1)[0]);
    }
  }

  override isDefaultOption(option: PageSize): boolean {
    return option === DEFAULT_PAGE_SIZE;
  }
}

declare global {
  interface HTMLElementTagNameMap {
    [PageSizeSelectElement.is]: PageSizeSelectElement;
  }
}

customElements.define(PageSizeSelectElement.is, PageSizeSelectElement);