front_end/panels/application/preloading/components/PreloadingDisabledInfobar.ts

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import '../../../../ui/components/report_view/report_view.js';
import '../../../../ui/kit/kit.js';

import * as i18n from '../../../../core/i18n/i18n.js';
import * as Platform from '../../../../core/platform/platform.js';
import * as Buttons from '../../../../ui/components/buttons/buttons.js';
import * as Dialogs from '../../../../ui/components/dialogs/dialogs.js';
import * as UI from '../../../../ui/legacy/legacy.js';
import {html, i18nTemplate, type LitTemplate, nothing, render} from '../../../../ui/lit/lit.js';
import * as VisualLogging from '../../../../ui/visual_logging/visual_logging.js';

import preloadingDisabledInfobarStyles from './preloadingDisabledInfobar.css.js';

const {urlString} = Platform.DevToolsPath;

const UIStrings = {
  /**
   * @description Infobar text for disabled case
   */
  infobarPreloadingIsDisabled: 'Speculative loading is disabled',
  /**
   * @description Infobar text for force-enabled case
   */
  infobarPreloadingIsForceEnabled: 'Speculative loading is force-enabled',
  /**
   * @description Title for dialog
   */
  titleReasonsPreventingPreloading: 'Reasons preventing speculative loading',
  /**
   * @description Header in dialog
   */
  headerDisabledByPreference: 'User settings or extensions',
  /**
   * @description Description in dialog
   * @example {Preload pages settings (linked to chrome://settings/performance)} PH1
   * @example {Extensions settings (linked to chrome://extensions)} PH2
   */
  descriptionDisabledByPreference:
      'Speculative loading is disabled because of user settings or an extension. Go to {PH1} to update your preference. Go to {PH2} to disable any extension that blocks speculative loading.',
  /**
   * @description Text of link
   */
  preloadingPagesSettings: 'Preload pages settings',
  /**
   * @description Text of link
   */
  extensionsSettings: 'Extensions settings',
  /**
   * @description Header in dialog
   */
  headerDisabledByDataSaver: 'Data Saver',
  /**
   * @description Description in dialog
   */
  descriptionDisabledByDataSaver: 'Speculative loading is disabled because of the operating system\'s Data Saver mode.',
  /**
   * @description Header in dialog
   */
  headerDisabledByBatterySaver: 'Battery Saver',
  /**
   * @description Description in dialog
   */
  descriptionDisabledByBatterySaver:
      'Speculative loading is disabled because of the operating system\'s Battery Saver mode.',
  /**
   * @description Header in dialog
   */
  headerDisabledByHoldbackPrefetchSpeculationRules: 'Prefetch was disabled, but is force-enabled now',
  /**
   * @description Description in infobar
   */
  descriptionDisabledByHoldbackPrefetchSpeculationRules:
      'Prefetch is forced-enabled because DevTools is open. When DevTools is closed, prefetch will be disabled because this browser session is part of a holdback group used for performance comparisons.',
  /**
   * @description Header in dialog
   */
  headerDisabledByHoldbackPrerenderSpeculationRules: 'Prerendering was disabled, but is force-enabled now',
  /**
   * @description Description in infobar
   */
  descriptionDisabledByHoldbackPrerenderSpeculationRules:
      'Prerendering is forced-enabled because DevTools is open. When DevTools is closed, prerendering will be disabled because this browser session is part of a holdback group used for performance comparisons.',
  /**
   * @description Footer link for more details
   */
  footerLearnMore: 'Learn more',
} as const;
const str_ =
    i18n.i18n.registerUIStrings('panels/application/preloading/components/PreloadingDisabledInfobar.ts', UIStrings);
const i18nString = i18n.i18n.getLocalizedString.bind(undefined, str_);

const LINK = 'https://developer.chrome.com/blog/prerender-pages/';

export interface ViewInput {
  header: Platform.UIString.LocalizedString|null;
  warnings: Array<{
    key: Platform.UIString.LocalizedString,
    valueId: string,
    placeholders?: Record<string, {
                  title: Platform.UIString.LocalizedString,
                  href: Platform.DevToolsPath.UrlString,
                }>,
  }>;
}

type ViewOutput = unknown;

export type View = (input: ViewInput, output: ViewOutput, target: HTMLElement|DocumentFragment) => void;

export const DEFAULT_VIEW: View = (input, _output, target) => {
  let template: LitTemplate = nothing;
  if (input.header !== null) {
    // Disabled until https://crbug.com/1079231 is fixed.
    // clang-format off
    template = html`
        <style>${preloadingDisabledInfobarStyles}</style>
        <div id="container">
          <span id="header">${input.header}</span>
          <devtools-button-dialog .data=${{
                                    iconName: 'info',
                                    variant: Buttons.Button.Variant.ICON,
                                    closeButton: true,
                                    position: Dialogs.Dialog.DialogVerticalPosition.AUTO,
                                    horizontalAlignment: Dialogs.Dialog.DialogHorizontalAlignment.AUTO,
                                    closeOnESC: true,
                                    closeOnScroll: false,
                                    dialogTitle: i18nString(UIStrings.titleReasonsPreventingPreloading),
                                  } as Dialogs.ButtonDialog.ButtonDialogData}
                                  jslog=${VisualLogging.dialog('preloading-disabled').track({resize: true, keydown: 'Escape'})}>
            <div id="contents">
              <devtools-report>
                ${input.warnings.map(({key, valueId, placeholders = {}}) => {
                  const value = i18nTemplate(
                      str_, valueId,
                      Object.fromEntries(Object.entries(placeholders).map(
                          ([key, {title, href}]) =>
                              [key, html`<devtools-link href=${href}>${title}</devtools-link>`])));
                  return html`
                      <div class="key">${key}</div>
                      <div class="value">${value}</div>
                    `;
                })}
              </devtools-report>
              <div id="footer">
                <devtools-link href=${LINK} jslogcontext="learn-more">
                  ${i18nString(UIStrings.footerLearnMore)}
                </devtools-link>
              </div>
            </div>
          </devtools-button-dialog>
        </div>`;
    // clang-format on
  }
  render(template, target);
};

export class PreloadingDisabledInfobar extends UI.Widget.VBox {
  #view: View;
  #disabledByPreference = false;
  #disabledByDataSaver = false;
  #disabledByBatterySaver = false;
  #disabledByHoldbackPrefetchSpeculationRules = false;
  #disabledByHoldbackPrerenderSpeculationRules = false;

  constructor(view: View = DEFAULT_VIEW) {
    super({useShadowDom: true});
    this.#view = view;
  }

  get disabledByPreference(): boolean {
    return this.#disabledByPreference;
  }

  set disabledByPreference(value: boolean) {
    if (this.#disabledByPreference !== value) {
      this.#disabledByPreference = value;
      this.requestUpdate();
    }
  }

  get disabledByDataSaver(): boolean {
    return this.#disabledByDataSaver;
  }

  set disabledByDataSaver(value: boolean) {
    if (this.#disabledByDataSaver !== value) {
      this.#disabledByDataSaver = value;
      this.requestUpdate();
    }
  }

  get disabledByBatterySaver(): boolean {
    return this.#disabledByBatterySaver;
  }

  set disabledByBatterySaver(value: boolean) {
    if (this.#disabledByBatterySaver !== value) {
      this.#disabledByBatterySaver = value;
      this.requestUpdate();
    }
  }

  get disabledByHoldbackPrefetchSpeculationRules(): boolean {
    return this.#disabledByHoldbackPrefetchSpeculationRules;
  }

  set disabledByHoldbackPrefetchSpeculationRules(value: boolean) {
    if (this.#disabledByHoldbackPrefetchSpeculationRules !== value) {
      this.#disabledByHoldbackPrefetchSpeculationRules = value;
      this.requestUpdate();
    }
  }

  get disabledByHoldbackPrerenderSpeculationRules(): boolean {
    return this.#disabledByHoldbackPrerenderSpeculationRules;
  }

  set disabledByHoldbackPrerenderSpeculationRules(value: boolean) {
    if (this.#disabledByHoldbackPrerenderSpeculationRules !== value) {
      this.#disabledByHoldbackPrerenderSpeculationRules = value;
      this.requestUpdate();
    }
  }

  override wasShown(): void {
    super.wasShown();
    this.requestUpdate();
  }

  override performUpdate(): void {
    let header: Platform.UIString.LocalizedString|null = null;
    if (this.#disabledByPreference || this.#disabledByDataSaver || this.#disabledByBatterySaver) {
      header = i18nString(UIStrings.infobarPreloadingIsDisabled);
    } else if (this.#disabledByHoldbackPrefetchSpeculationRules || this.#disabledByHoldbackPrerenderSpeculationRules) {
      header = i18nString(UIStrings.infobarPreloadingIsForceEnabled);
    }
    const warnings = [];
    if (this.#disabledByPreference) {
      warnings.push({
        key: i18nString(UIStrings.headerDisabledByPreference),
        valueId: UIStrings.descriptionDisabledByPreference,
        placeholders: {
          PH1: {
            title: i18nString(UIStrings.preloadingPagesSettings),
            href: urlString`chrome://settings/performance`,
          },
          PH2: {
            title: i18nString(UIStrings.extensionsSettings),
            href: urlString`chrome://extensions`,
          },
        },
      });
    }
    if (this.#disabledByDataSaver) {
      warnings.push({
        key: i18nString(UIStrings.headerDisabledByDataSaver),
        valueId: UIStrings.descriptionDisabledByDataSaver,
      });
    }
    if (this.#disabledByBatterySaver) {
      warnings.push({
        key: i18nString(UIStrings.headerDisabledByBatterySaver),
        valueId: UIStrings.descriptionDisabledByBatterySaver,
      });
    }
    if (this.#disabledByHoldbackPrefetchSpeculationRules) {
      warnings.push({
        key: i18nString(UIStrings.headerDisabledByHoldbackPrefetchSpeculationRules),
        valueId: UIStrings.descriptionDisabledByHoldbackPrefetchSpeculationRules,
      });
    }
    if (this.#disabledByHoldbackPrerenderSpeculationRules) {
      warnings.push({
        key: i18nString(UIStrings.headerDisabledByHoldbackPrerenderSpeculationRules),
        valueId: UIStrings.descriptionDisabledByHoldbackPrerenderSpeculationRules,
      });
    }
    const input: ViewInput = {
      header,
      warnings,
    };
    const output: ViewOutput = undefined;
    this.#view(input, output, this.contentElement);
  }
}