/
amp-story.js
2759 lines (2426 loc) · 80.1 KB
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amp-story.js
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/**
* Copyright 2017 The AMP HTML Authors. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS-IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Embeds a story
*
* Example:
* <code>
* <amp-story standalone>
* [...]
* </amp-story>
* </code>
*/
import './amp-story-cta-layer';
import './amp-story-grid-layer';
import './amp-story-page';
import {
Action,
EmbeddedComponentState,
InteractiveComponentDef,
StateProperty,
UIType,
getStoreService,
} from './amp-story-store-service';
import {ActionTrust} from '../../../src/action-constants';
import {AdvancementConfig, TapNavigationDirection} from './page-advancement';
import {
AdvancementMode,
StoryAnalyticsEvent,
getAnalyticsService,
} from './story-analytics';
import {AmpEvents} from '../../../src/amp-events';
import {AmpStoryAccess} from './amp-story-access';
import {AmpStoryBookend} from './bookend/amp-story-bookend';
import {AmpStoryConsent} from './amp-story-consent';
import {AmpStoryCtaLayer} from './amp-story-cta-layer';
import {AmpStoryEmbeddedComponent} from './amp-story-embedded-component';
import {AmpStoryGridLayer} from './amp-story-grid-layer';
import {AmpStoryHint} from './amp-story-hint';
import {AmpStoryPage, NavigationDirection, PageState} from './amp-story-page';
import {AmpStoryPageAttachment} from './amp-story-page-attachment';
import {AmpStoryQuiz} from './amp-story-quiz';
import {AmpStoryRenderService} from './amp-story-render-service';
import {AmpStoryViewerMessagingHandler} from './amp-story-viewer-messaging-handler';
import {AnalyticsVariable, getVariableService} from './variable-service';
import {CSS} from '../../../build/amp-story-1.0.css';
import {CommonSignals} from '../../../src/common-signals';
import {EventType, dispatch} from './events';
import {Gestures} from '../../../src/gesture';
import {
HistoryState,
getHistoryState,
removeAttributeInMutate,
setAttributeInMutate,
setHistoryState,
shouldShowStoryUrlInfo,
} from './utils';
import {InfoDialog} from './amp-story-info-dialog';
import {Keys} from '../../../src/utils/key-codes';
import {Layout} from '../../../src/layout';
import {LiveStoryManager} from './live-story-manager';
import {LocalizationService} from '../../../src/service/localization';
import {MediaPool, MediaType} from './media-pool';
import {PaginationButtons} from './pagination-buttons';
import {Services} from '../../../src/services';
import {ShareMenu} from './amp-story-share-menu';
import {SwipeXYRecognizer} from '../../../src/gesture-recognizers';
import {SystemLayer} from './amp-story-system-layer';
import {UnsupportedBrowserLayer} from './amp-story-unsupported-browser-layer';
import {ViewportWarningLayer} from './amp-story-viewport-warning-layer';
import {
childElement,
childElementByTag,
childElements,
childNodes,
closest,
createElementWithAttributes,
isRTL,
scopedQuerySelectorAll,
whenUpgradedToCustomElement,
} from '../../../src/dom';
import {
computedStyle,
resetStyles,
setImportantStyles,
toggle,
} from '../../../src/style';
import {createPseudoLocale} from '../../../src/localized-strings';
import {debounce} from '../../../src/utils/rate-limit';
import {dev, devAssert, user} from '../../../src/log';
import {dict, map} from '../../../src/utils/object';
import {endsWith} from '../../../src/string';
import {escapeCssSelectorIdent} from '../../../src/css';
import {findIndex, lastItem} from '../../../src/utils/array';
import {getConsentPolicyState} from '../../../src/consent';
import {getDetail} from '../../../src/event-helper';
import {getMediaQueryService} from './amp-story-media-query-service';
import {getMode} from '../../../src/mode';
import {getState} from '../../../src/history';
import {isExperimentOn} from '../../../src/experiments';
import {parseQueryString} from '../../../src/url';
import {registerServiceBuilder} from '../../../src/service';
import {upgradeBackgroundAudio} from './audio';
import LocalizedStringsAr from './_locales/ar';
import LocalizedStringsDe from './_locales/de';
import LocalizedStringsDefault from './_locales/default';
import LocalizedStringsEn from './_locales/en';
import LocalizedStringsEnGb from './_locales/en-GB';
import LocalizedStringsEs from './_locales/es';
import LocalizedStringsEs419 from './_locales/es-419';
import LocalizedStringsFr from './_locales/fr';
import LocalizedStringsHi from './_locales/hi';
import LocalizedStringsId from './_locales/id';
import LocalizedStringsIt from './_locales/it';
import LocalizedStringsJa from './_locales/ja';
import LocalizedStringsKo from './_locales/ko';
import LocalizedStringsNl from './_locales/nl';
import LocalizedStringsNo from './_locales/no';
import LocalizedStringsPtBr from './_locales/pt-BR';
import LocalizedStringsPtPt from './_locales/pt-PT';
import LocalizedStringsRu from './_locales/ru';
import LocalizedStringsTr from './_locales/tr';
import LocalizedStringsVi from './_locales/vi';
import LocalizedStringsZhCn from './_locales/zh-CN';
import LocalizedStringsZhTw from './_locales/zh-TW';
/** @private @const {number} */
const DESKTOP_WIDTH_THRESHOLD = 1024;
/** @private @const {number} */
const DESKTOP_HEIGHT_THRESHOLD = 550;
/** @private @const {number} */
const MIN_SWIPE_FOR_HINT_OVERLAY_PX = 50;
/** @enum {string} */
const Attributes = {
AD_SHOWING: 'ad-showing',
ADVANCE_TO: 'i-amphtml-advance-to',
AUTO_ADVANCE_AFTER: 'auto-advance-after',
AUTO_ADVANCE_TO: 'auto-advance-to',
DESKTOP_POSITION: 'i-amphtml-desktop-position',
ORIENTATION: 'orientation',
PUBLIC_ADVANCE_TO: 'advance-to',
RETURN_TO: 'i-amphtml-return-to',
STANDALONE: 'standalone',
SUPPORTS_LANDSCAPE: 'supports-landscape',
// Attributes that desktop css looks for to decide where pages will be placed
VISITED: 'i-amphtml-visited', // stacked offscreen to left
};
/**
* The duration of time (in milliseconds) to wait for a page to be loaded,
* before the story becomes visible.
* @const {number}
*/
const PAGE_LOAD_TIMEOUT_MS = 5000;
/**
* Single page ads may be injected later. If the original story contains 0 media
* elements the mediaPool will not be able to handle the injected audio/video
* Therefore we preallocate a minimum here.
* @const {number}
*/
const MINIMUM_AD_MEDIA_ELEMENTS = 2;
/**
* CSS class for an amp-story that indicates the initial load for the story has
* completed.
* @const {string}
*/
const STORY_LOADED_CLASS_NAME = 'i-amphtml-story-loaded';
/**
* CSS class for the opacity layer that separates the amp-sidebar and the rest
* of the story when the amp-sidebar is entering the screen.
* @const {string}
*/
const OPACITY_MASK_CLASS_NAME = 'i-amphtml-story-opacity-mask';
/**
* CSS class for sidebars in stories.
* @const {string}
*/
const SIDEBAR_CLASS_NAME = 'i-amphtml-story-sidebar';
/** @const {!Object<string, number>} */
const MAX_MEDIA_ELEMENT_COUNTS = {
[MediaType.AUDIO]: 4,
[MediaType.VIDEO]: 8,
};
/** @type {string} */
const TAG = 'amp-story';
/**
* Selector for elements that should be hidden when the bookend is open on
* desktop view.
* @private @const {string}
*/
const HIDE_ON_BOOKEND_SELECTOR =
'amp-story-page, .i-amphtml-story-system-layer';
/**
* The default dark gray for chrome supported theme color.
* @const {string}
*/
const DEFAULT_THEME_COLOR = '#202125';
/**
* MutationObserverInit options to listen for changes to the `open` attribute.
*/
const SIDEBAR_OBSERVER_OPTIONS = {
attributes: true,
attributeFilter: ['open'],
};
/**
* @implements {./media-pool.MediaPoolRoot}
*/
export class AmpStory extends AMP.BaseElement {
/** @param {!AmpElement} element */
constructor(element) {
super(element);
/** @private @const {!./amp-story-store-service.AmpStoryStoreService} */
this.storeService_ = getStoreService(this.win);
// Check if story is RTL.
if (isRTL(this.win.document)) {
this.storeService_.dispatch(Action.TOGGLE_RTL, true);
}
/** @private {!./story-analytics.StoryAnalyticsService} */
this.analyticsService_ = getAnalyticsService(this.win, this.element);
/** @private @const {!AdvancementConfig} */
this.advancement_ = AdvancementConfig.forElement(this.win, this.element);
this.advancement_.start();
/** @const @private {!../../../src/service/vsync-impl.Vsync} */
this.vsync_ = this.getVsync();
/** @private {?AmpStoryBookend} */
this.bookend_ = null;
/** @private @const {!ShareMenu} Preloads and prerenders the share menu. */
this.shareMenu_ = new ShareMenu(this.win, this.element);
/** @private @const {!SystemLayer} */
this.systemLayer_ = new SystemLayer(this.win, this.element);
/** Instantiate in case there are embedded components. */
new AmpStoryEmbeddedComponent(this.win, this.element);
/** @private @const {!UnsupportedBrowserLayer} */
this.unsupportedBrowserLayer_ = new UnsupportedBrowserLayer(this.win);
/** Instantiates the viewport warning layer. */
new ViewportWarningLayer(
this.win,
this.element,
DESKTOP_WIDTH_THRESHOLD,
DESKTOP_HEIGHT_THRESHOLD
);
/** @private {!Array<!./amp-story-page.AmpStoryPage>} */
this.pages_ = [];
/** @private @const {!Array<!./amp-story-page.AmpStoryPage>} */
this.adPages_ = [];
/** @const @private {!./variable-service.AmpStoryVariableService} */
this.variableService_ = getVariableService(this.win);
/** @private {?./amp-story-page.AmpStoryPage} */
this.activePage_ = null;
/** @private @const */
this.desktopMedia_ = this.win.matchMedia(
`(min-width: ${DESKTOP_WIDTH_THRESHOLD}px) and ` +
`(min-height: ${DESKTOP_HEIGHT_THRESHOLD}px)`
);
/** @private @const */
this.canRotateToDesktopMedia_ = this.win.matchMedia(
`(min-width: ${DESKTOP_HEIGHT_THRESHOLD}px) and ` +
`(min-height: ${DESKTOP_WIDTH_THRESHOLD}px)`
);
/** @private @const */
this.landscapeOrientationMedia_ = this.win.matchMedia(
'(orientation: landscape)'
);
/** @private {?HTMLMediaElement} */
this.backgroundAudioEl_ = null;
/** @private {?./pagination-buttons.PaginationButtons} */
this.paginationButtons_ = null;
/** @private {!AmpStoryHint} */
this.ampStoryHint_ = new AmpStoryHint(this.win, this.element);
/** @private {!MediaPool} */
this.mediaPool_ = MediaPool.for(this);
/** @private {boolean} */
this.areAccessAuthorizationsCompleted_ = false;
/** @private */
this.navigateToPageAfterAccess_ = null;
/** @private @const {!../../../src/service/timer-impl.Timer} */
this.timer_ = Services.timerFor(this.win);
/** @private @const {!../../../src/service/platform-impl.Platform} */
this.platform_ = Services.platformFor(this.win);
/** @private @const {!../../../src/service/viewer-interface.ViewerInterface} */
this.viewer_ = Services.viewerForDoc(this.element);
/** @private @const {?AmpStoryViewerMessagingHandler} */
this.viewerMessagingHandler_ = this.viewer_.isEmbedded()
? new AmpStoryViewerMessagingHandler(this.win, this.viewer_)
: null;
/**
* Store the current paused state, to make sure the story does not play on
* resume if it was previously paused.
* @private {boolean}
*/
this.pausedStateToRestore_ = false;
/** @private {?Element} */
this.sidebar_ = null;
/** @private {?MutationObserver} */
this.sidebarObserver_ = null;
/** @private {?Element} */
this.maskElement_ = null;
/** @private {?LiveStoryManager} */
this.liveStoryManager_ = null;
/** @private @const {!LocalizationService} */
this.localizationService_ = new LocalizationService(this.win);
const localizationService = this.localizationService_;
this.localizationService_
.registerLocalizedStringBundle('default', LocalizedStringsDefault)
.registerLocalizedStringBundle('ar', LocalizedStringsAr)
.registerLocalizedStringBundle('de', LocalizedStringsDe)
.registerLocalizedStringBundle('en', LocalizedStringsEn)
.registerLocalizedStringBundle('en-GB', LocalizedStringsEnGb)
.registerLocalizedStringBundle('es', LocalizedStringsEs)
.registerLocalizedStringBundle('es-419', LocalizedStringsEs419)
.registerLocalizedStringBundle('fr', LocalizedStringsFr)
.registerLocalizedStringBundle('hi', LocalizedStringsHi)
.registerLocalizedStringBundle('id', LocalizedStringsId)
.registerLocalizedStringBundle('it', LocalizedStringsIt)
.registerLocalizedStringBundle('ja', LocalizedStringsJa)
.registerLocalizedStringBundle('ko', LocalizedStringsKo)
.registerLocalizedStringBundle('nl', LocalizedStringsNl)
.registerLocalizedStringBundle('no', LocalizedStringsNo)
.registerLocalizedStringBundle('pt-PT', LocalizedStringsPtPt)
.registerLocalizedStringBundle('pt-BR', LocalizedStringsPtBr)
.registerLocalizedStringBundle('ru', LocalizedStringsRu)
.registerLocalizedStringBundle('tr', LocalizedStringsTr)
.registerLocalizedStringBundle('vi', LocalizedStringsVi)
.registerLocalizedStringBundle('zh-CN', LocalizedStringsZhCn)
.registerLocalizedStringBundle('zh-TW', LocalizedStringsZhTw);
const enXaPseudoLocaleBundle = createPseudoLocale(
LocalizedStringsEn,
s => `[${s} one two]`
);
this.localizationService_.registerLocalizedStringBundle(
'en-xa',
enXaPseudoLocaleBundle
);
registerServiceBuilder(this.win, 'localization', function() {
return localizationService;
});
}
/** @override */
buildCallback() {
if (this.isStandalone_()) {
this.initializeStandaloneStory_();
}
// buildCallback already runs in a mutate context. Calling another
// mutateElement explicitly will force the runtime to remeasure the
// amp-story element, fixing rendering bugs where the story is inactive
// (layoutCallback not called) when accessed from any viewer using
// prerendering, because of a height incorrectly set to 0.
this.mutateElement(() => {});
const pageEl = this.element.querySelector('amp-story-page');
pageEl && pageEl.setAttribute('active', '');
this.initializeStyles_();
this.initializeListeners_();
this.initializeListenersForDev_();
this.initializePageIds_();
this.initializeStoryPlayer_();
this.storeService_.dispatch(Action.TOGGLE_UI, this.getUIType_());
// Disables the bookend entirely if the story is within a group of stories.
if (this.viewer_.hasCapability('swipe')) {
this.storeService_.dispatch(Action.TOGGLE_CAN_SHOW_BOOKEND, false);
}
// Removes title in order to prevent incorrect titles appearing on link
// hover. (See 17654)
this.element.removeAttribute('title');
// Remove text nodes which would be shown outside of the amp-story
const textNodes = childNodes(
this.element,
node => node.nodeType === Node.TEXT_NODE
);
textNodes.forEach(node => {
this.element.removeChild(node);
});
if (isExperimentOn(this.win, 'amp-story-branching')) {
this.registerAction('goToPage', invocation => {
const {args} = invocation;
if (!args) {
return;
}
this.storeService_.dispatch(
Action.SET_ADVANCEMENT_MODE,
AdvancementMode.GO_TO_PAGE
);
// If open, closes the sidebar before navigating.
const promise = this.storeService_.get(StateProperty.SIDEBAR_STATE)
? Services.historyForDoc(this.getAmpDoc()).goBack()
: Promise.resolve();
promise.then(() =>
this.switchTo_(args['id'], NavigationDirection.NEXT)
);
});
}
}
/**
* Pauses the whole story on viewer visibilityState updates, or tab visibility
* updates.
* @private
*/
pause_() {
this.pausedStateToRestore_ = !!this.storeService_.get(
StateProperty.PAUSED_STATE
);
this.storeService_.dispatch(Action.TOGGLE_PAUSED, true);
}
/**
* Resumes the whole story on viewer visibilityState updates, or tab
* visibility updates.
* @private
*/
resume_() {
this.storeService_.dispatch(
Action.TOGGLE_PAUSED,
this.pausedStateToRestore_
);
}
/**
* Note: runs in the buildCallback vsync mutate context.
* @private
*/
initializeStandaloneStory_() {
const html = this.win.document.documentElement;
html.classList.add('i-amphtml-story-standalone');
// Lock body to prevent overflow.
this.lockBody_();
// Standalone CSS affects sizing of the entire page.
this.onResize();
}
/** @private */
initializeStyles_() {
const mediaQueryEls = this.element.querySelectorAll('media-query');
if (mediaQueryEls.length) {
this.initializeMediaQueries_(mediaQueryEls);
}
const styleEl = this.win.document.querySelector('style[amp-custom]');
if (styleEl) {
this.rewriteStyles_(styleEl);
}
}
/**
* Registers the media queries
* @param {!NodeList<!Element>} mediaQueryEls
* @private
*/
initializeMediaQueries_(mediaQueryEls) {
const service = getMediaQueryService(this.win);
const onMediaQueryMatch = (matches, className) => {
this.mutateElement(() => {
this.element.classList.toggle(className, matches);
});
};
mediaQueryEls.forEach(el => {
const className = el.getAttribute('class-name');
const media = el.getAttribute('media');
if (className && media) {
service.onMediaQueryMatch(media, matches =>
onMediaQueryMatch(matches, className)
);
}
});
}
/**
* Initializes page ids by deduplicating them.
* @private
*/
initializePageIds_() {
const pageEls = this.element.querySelectorAll('amp-story-page');
const pageIds = Array.prototype.map.call(
pageEls,
el => el.id || 'default-page'
);
const idsMap = map();
for (let i = 0; i < pageIds.length; i++) {
if (idsMap[pageIds[i]] === undefined) {
idsMap[pageIds[i]] = 0;
continue;
}
user().error(TAG, `Duplicate amp-story-page ID ${pageIds[i]}`);
const newId = `${pageIds[i]}__${++idsMap[pageIds[i]]}`;
pageEls[i].id = newId;
pageIds[i] = newId;
}
this.storeService_.dispatch(Action.SET_PAGE_IDS, pageIds);
}
/**
* @param {!Element} styleEl
* @private
*/
rewriteStyles_(styleEl) {
if (!isExperimentOn(this.win, 'amp-story-responsive-units')) {
return;
}
// TODO(#15955): Update this to use CssContext from
// ../../../extensions/amp-animation/0.1/web-animations.js
this.mutateElement(() => {
styleEl.textContent = styleEl.textContent
.replace(/(-?[\d.]+)vh/gim, 'calc($1 * var(--story-page-vh))')
.replace(/(-?[\d.]+)vw/gim, 'calc($1 * var(--story-page-vw))')
.replace(/(-?[\d.]+)vmin/gim, 'calc($1 * var(--story-page-vmin))')
.replace(/(-?[\d.]+)vmax/gim, 'calc($1 * var(--story-page-vmax))');
});
}
/**
* @private
*/
setThemeColor_() {
// Don't override the publisher's tag.
if (this.win.document.querySelector('meta[name=theme-color]')) {
return;
}
// The theme color should be copied from the story's primary accent color
// if possible, with the fall back being default dark gray.
const meta = this.win.document.createElement('meta');
const ampStoryPageEl = this.element.querySelector('amp-story-page');
meta.name = 'theme-color';
meta.content =
computedStyle(this.win, this.element).getPropertyValue(
'--primary-color'
) ||
computedStyle(
this.win,
dev().assertElement(ampStoryPageEl)
).getPropertyValue('background-color') ||
DEFAULT_THEME_COLOR;
this.win.document.head.appendChild(meta);
}
/**
* Builds the system layer DOM.
* @param {string} initialPageId
* @private
*/
buildSystemLayer_(initialPageId) {
this.updateAudioIcon_();
this.element.appendChild(this.systemLayer_.build(initialPageId));
}
/** @private */
initializeListeners_() {
this.element.addEventListener(EventType.NEXT_PAGE, () => {
this.next_();
});
this.element.addEventListener(EventType.PREVIOUS_PAGE, () => {
this.previous_();
});
this.storeService_.subscribe(
StateProperty.MUTED_STATE,
isMuted => {
this.onMutedStateUpdate_(isMuted);
this.variableService_.onVariableUpdate(
AnalyticsVariable.STORY_IS_MUTED,
isMuted
);
},
true /** callToInitialize */
);
this.storeService_.subscribe(
StateProperty.MUTED_STATE,
isMuted => {
// We do not want to trigger an analytics event for the initialization of
// the muted state.
this.analyticsService_.triggerEvent(
isMuted
? StoryAnalyticsEvent.STORY_MUTED
: StoryAnalyticsEvent.STORY_UNMUTED
);
},
false /** callToInitialize */
);
this.storeService_.subscribe(
StateProperty.SUPPORTED_BROWSER_STATE,
isBrowserSupported => {
this.onSupportedBrowserStateUpdate_(isBrowserSupported);
}
);
this.storeService_.subscribe(StateProperty.ADVANCEMENT_MODE, mode => {
this.variableService_.onVariableUpdate(
AnalyticsVariable.STORY_ADVANCEMENT_MODE,
mode
);
});
this.element.addEventListener(EventType.SWITCH_PAGE, e => {
if (this.storeService_.get(StateProperty.BOOKEND_STATE)) {
// Disallow switching pages while the bookend is active.
return;
}
this.switchTo_(getDetail(e)['targetPageId'], getDetail(e)['direction']);
this.ampStoryHint_.hideAllNavigationHint();
});
this.element.addEventListener(EventType.PAGE_PROGRESS, e => {
const detail = getDetail(e);
const pageId = detail['pageId'];
const progress = detail['progress'];
if (pageId !== this.activePage_.element.id) {
// Ignore progress update events from inactive pages.
return;
}
if (!this.activePage_.isAd()) {
this.systemLayer_.updateProgress(pageId, progress);
}
});
this.element.addEventListener(EventType.REPLAY, () => {
this.replay_();
});
this.element.addEventListener(EventType.NO_NEXT_PAGE, () => {
this.onNoNextPage_();
});
this.element.addEventListener(EventType.NO_PREVIOUS_PAGE, () => {
this.onNoPreviousPage_();
});
this.advancement_.addOnTapNavigationListener(direction => {
this.performTapNavigation_(direction);
});
this.element.addEventListener(EventType.DISPATCH_ACTION, e => {
if (!getMode().test) {
return;
}
const action = getDetail(e)['action'];
const data = getDetail(e)['data'];
this.storeService_.dispatch(action, data);
});
// Actions whitelist could be initialized empty, or with some actions some
// other components registered.
this.storeService_.subscribe(
StateProperty.ACTIONS_WHITELIST,
actionsWhitelist => {
const actions = Services.actionServiceForDoc(this.element);
actions.setWhitelist(actionsWhitelist);
},
true /** callToInitialize */
);
this.storeService_.subscribe(StateProperty.AD_STATE, isAd => {
this.onAdStateUpdate_(isAd);
});
this.storeService_.subscribe(StateProperty.BOOKEND_STATE, isActive => {
this.onBookendStateUpdate_(isActive);
});
this.storeService_.subscribe(StateProperty.PAUSED_STATE, isPaused => {
this.onPausedStateUpdate_(isPaused);
});
this.storeService_.subscribe(StateProperty.SIDEBAR_STATE, sidebarState => {
this.onSidebarStateUpdate_(sidebarState);
});
this.storeService_.subscribe(
StateProperty.UI_STATE,
uiState => {
this.onUIStateUpdate_(uiState);
},
true /** callToInitialize */
);
this.win.document.addEventListener(
'keydown',
e => {
this.onKeyDown_(e);
},
true
);
this.win.document.addEventListener('contextmenu', e => {
const uiState = this.storeService_.get(StateProperty.UI_STATE);
if (uiState === UIType.MOBILE) {
e.preventDefault();
e.stopPropagation();
}
});
this.getAmpDoc().onVisibilityChanged(() => this.onVisibilityChanged_());
this.win.addEventListener('hashchange', () => {
const maybePageId = parseQueryString(this.win.location.hash)['page'];
if (!maybePageId || !this.isActualPage_(maybePageId)) {
return;
}
this.switchTo_(maybePageId, NavigationDirection.NEXT);
// Removes the page 'hash' parameter from the URL.
let href = this.win.location.href.replace(
new RegExp(`page=${maybePageId}&?`),
''
);
if (endsWith(href, '#')) {
href = href.slice(0, -1);
}
this.win.history.replaceState(
(this.win.history && getState(this.win.history)) || {} /** data */,
this.win.document.title /** title */,
href /** URL */
);
});
this.getViewport().onResize(debounce(this.win, () => this.onResize(), 300));
this.installGestureRecognizers_();
// TODO(gmajoulet): migrate this to amp-story-viewer-messaging-handler once
// there is a way to navigate to pages that does not involve using private
// amp-story methods.
this.viewer_.onMessage('selectPage', data => this.onSelectPage_(data));
if (this.viewerMessagingHandler_) {
this.viewerMessagingHandler_.startListening();
}
}
/** @private */
installGestureRecognizers_() {
// If the story is within a viewer that enabled the swipe capability, this
// disables the navigation education overlay to enable:
// - horizontal swipe events to the next story
// - vertical swipe events to close the viewer, or open a page attachment
if (this.viewer_.hasCapability('swipe')) {
return;
}
const {element} = this;
const gestures = Gestures.get(element, /* shouldNotPreventDefault */ true);
// Shows "tap to navigate" hint when swiping.
gestures.onGesture(SwipeXYRecognizer, gesture => {
const {deltaX, deltaY} = gesture.data;
const embedComponent = /** @type {InteractiveComponentDef} */ (this.storeService_.get(
StateProperty.INTERACTIVE_COMPONENT_STATE
));
// TODO(enriqe): Move to a separate file if this keeps growing.
if (
this.storeService_.get(StateProperty.BOOKEND_STATE) ||
embedComponent.state !== EmbeddedComponentState.HIDDEN ||
this.storeService_.get(StateProperty.ACCESS_STATE) ||
this.storeService_.get(StateProperty.SIDEBAR_STATE) ||
!this.storeService_.get(StateProperty.SYSTEM_UI_IS_VISIBLE_STATE) ||
!this.storeService_.get(StateProperty.CAN_SHOW_NAVIGATION_OVERLAY_HINT)
) {
// Cancels the event for this gesture entirely, ensuring the hint won't
// show even if the user keeps swiping without releasing the touch.
if (gesture.event && gesture.event.cancelable !== false) {
gesture.event.preventDefault();
}
return;
}
if (
(gesture.event && gesture.event.defaultPrevented) ||
!this.isSwipeLargeEnoughForHint_(deltaX, deltaY)
) {
return;
}
this.ampStoryHint_.showNavigationOverlay();
});
}
/**
* @param {number} deltaX
* @param {number} deltaY
* @return {boolean}
* @private
*/
isSwipeLargeEnoughForHint_(deltaX, deltaY) {
const sideSwipe = Math.abs(deltaX) >= MIN_SWIPE_FOR_HINT_OVERLAY_PX;
const upSwipe = -1 * deltaY >= MIN_SWIPE_FOR_HINT_OVERLAY_PX;
return sideSwipe || upSwipe;
}
/** @private */
initializeListenersForDev_() {
if (!getMode().development) {
return;
}
this.element.addEventListener(EventType.DEV_LOG_ENTRIES_AVAILABLE, e => {
this.systemLayer_.logAll(/** @type {?} */ (getDetail(e)));
});
}
/** @private */
lockBody_() {
const {document} = this.win;
setImportantStyles(document.documentElement, {
'overflow': 'hidden',
});
setImportantStyles(document.body, {
'overflow': 'hidden',
});
this.getViewport().resetTouchZoom();
this.getViewport().disableTouchZoom();
this.maybeLockScreenOrientation_();
}
/** @private */
maybeLockScreenOrientation_() {
const {screen} = this.win;
if (!screen || !this.canRotateToDesktopMedia_.matches) {
return;
}
const lockOrientation =
screen.lockOrientation ||
screen.mozLockOrientation ||
screen.msLockOrientation ||
(unusedOrientation => {});
try {
lockOrientation('portrait');
} catch (e) {
dev().warn(TAG, 'Failed to lock screen orientation:', e.message);
}
}
/** @private */
buildPaginationButtons_() {
if (
this.paginationButtons_ ||
!this.storeService_.get(StateProperty.CAN_SHOW_PAGINATION_BUTTONS)
) {
return;
}
// TODO(#19768): Avoid passing a private function here.
this.paginationButtons_ = PaginationButtons.create(this, () =>
this.hasBookend_()
);
this.paginationButtons_.attach(this.element);
}
/** @visibleForTesting */
buildPaginationButtonsForTesting() {
this.buildPaginationButtons_();
}
/** @override */
layoutCallback() {
if (!AmpStory.isBrowserSupported(this.win) && !this.platform_.isBot()) {
this.storeService_.dispatch(Action.TOGGLE_SUPPORTED_BROWSER, false);
return Promise.resolve();
}
return this.layoutStory_();
}
/**
* Renders the layout for the story
* @return {!Promise} A promise that is resolved when the story layout is
* loaded
* @private
*/
layoutStory_() {
const firstPageEl = user().assertElement(
this.element.querySelector('amp-story-page'),
'Story must have at least one page.'
);
const initialPageId = this.getInitialPageId_(firstPageEl);
this.buildSystemLayer_(initialPageId);
this.initializeSidebar_();
this.setThemeColor_();
const storyLayoutPromise = Promise.all([
this.getAmpDoc().whenFirstVisible(), // Pauses execution during prerender.
this.initializePages_(),
])
.then(() => {
this.handleConsentExtension_();
this.initializeStoryAccess_();
this.pages_.forEach((page, index) => {
page.setState(PageState.NOT_ACTIVE);
this.upgradeCtaAnchorTagsForTracking_(page, index);
});
this.initializeStoryNavigationPath_();
})
.then(() => this.initializeBookend_())
.then(() => {
const bookendInHistory = !!getHistoryState(
this.win,
HistoryState.BOOKEND_ACTIVE
);
if (bookendInHistory) {
return this.hasBookend_().then(hasBookend => {
if (hasBookend) {
return this.showBookend_();
}
});
}
})
.then(() => this.switchTo_(initialPageId, NavigationDirection.NEXT))
.then(() => {
const shouldReOpenAttachmentForPageId = getHistoryState(
this.win,
HistoryState.ATTACHMENT_PAGE_ID
);
if (shouldReOpenAttachmentForPageId === this.activePage_.element.id) {
this.activePage_.openAttachment(false /** shouldAnimate */);
}
// Preloads and prerenders the share menu.