May 2022 Release of the APL 2022.1 compliant APL Viewhost Web

For more details on this release refer to CHANGELOG.md

To learn about APL see: https://developer.amazon.com/docs/alexa-presentation-language/understand-apl.html

Author: bddufour

CHANGELOG.md

@@ -1,5 +1,21 @@
 # Changelog for apl-viewhost-web
 
+## [2022.1]
+
+This release adds support for version 2022.1 of the APL specification. Please also see APL Core Library for changes: [apl-core-library CHANGELOG](https://github.com/alexa/apl-core-library/blob/master/CHANGELOG.md)
+
+### Added
+
+- Added muted property to video component
+- Exposed scrollCommandDuration
+
+### Changed
+
+- Improved support for HLS video
+- Scale factor can be specified independently per renderer
+- Changed clipping behaviour for documents using APL <= 1.5 for backwards compatibility
+- Bug fixes 
+
 ## [1.9.0]
 
 This release adds support for version 1.9 of the APL specification. Please also see APL Core Library for changes: [apl-core-library CHANGELOG](https://github.com/alexa/apl-core-library/blob/master/CHANGELOG.md)

CMakeLists.txt

@@ -12,6 +12,12 @@ option(WEBSOCKET "Build Websocket Server" OFF)
 option(EMSCRIPTEN_SOURCEMAPS "Builds source maps." OFF)
 option(WASM_PROFILING "WASM profiling mode." OFF)
 
+if(WASM)
+    # make sure we enable exception support when building APL core, since PEGTL
+    # relies on it
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fexceptions")
+endif()
+
 if(${APL_CORE_PATH} STREQUAL "OFF")
     set(APL_CORE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../APLCoreEngine)
 endif()

README.md

@@ -1,10 +1,10 @@
 # Alexa Presentation Language (APL) Viewhost Web
 
 <p>
- <a href="https://github.com/alexa/apl-viewhost-web/tree/v1.9.0" alt="version">
- <img src="https://img.shields.io/badge/stable%20version-1.9.0-brightgreen" /></a>
- <a href="https://github.com/alexa/apl-core-library/tree/v1.9.1" alt="APLCore">
- <img src="https://img.shields.io/badge/apl%20core%20library-1.9.1-navy" /></a>
+ <a href="https://github.com/alexa/apl-viewhost-web/tree/v2022.1" alt="version">
+ <img src="https://img.shields.io/badge/stable%20version-2022.1-brightgreen" /></a>
+ <a href="https://github.com/alexa/apl-core-library/tree/v2022.1" alt="APLCore">
+ <img src="https://img.shields.io/badge/apl%20core%20library-2022.1-navy" /></a>
 </p>
 
 ## Introduction

js/apl-html/lib/dts/Context.d.ts

@@ -44,9 +44,9 @@ declare namespace APL {
 
         public setBackground(background: APL.IBackground): void;
 
-        public getDataSourceContext(): string;
+        public getDataSourceContext(): Promise<string>;
 
-        public getVisualContext(): string;
+        public getVisualContext(): Promise<string>;
 
         public clearPending(): void;
 

js/apl-html/src/APLRenderer.ts

@@ -23,6 +23,7 @@ import { IExtensionManager } from './extensions/IExtensionManager';
 import { ILogger } from './logging/ILogger';
 import { LoggerFactory } from './logging/LoggerFactory';
 import { AudioPlayerFactory } from './media/audio/AudioPlayer';
+import { createAplVersionUtils } from './utils/AplVersionUtils';
 import { browserIsEdge } from './utils/BrowserUtils';
 import { ARROW_DOWN, ARROW_LEFT, ARROW_RIGHT, ARROW_UP, ENTER_KEY, HttpStatusCodes } from './utils/Constant';
 import { isDisplayState } from './utils/DisplayStateUtils';
@@ -31,6 +32,8 @@ import { fetchMediaResource } from './utils/MediaRequestUtils';
 
 const agentName = 'AplWebRenderer';
 const agentVersion = '1.0.0';
+const MAX_LEGACY_CLIPPING_APL_VERSION = '1.5';
+
 // For touch enabled browser, touch event will be followed by a mouse event after 300ms-500ms up to browser.
 // This will cause issue which triggers click or press events twice.
 // setup a 500ms gap between two events.
@@ -301,6 +304,12 @@ export default abstract class APLRenderer<Options = any> {
      */
     public abstract getLegacyKaraoke(): boolean;
 
+    /**
+     * @internal
+     * @ignore
+     */
+    protected abstract getDocumentAplVersion(): string;
+
     /** A reference to the APL root context */
     public context: APL.Context;
 
@@ -910,6 +919,19 @@ export default abstract class APLRenderer<Options = any> {
         }
     }
 
+    /**
+     * @internal
+     * @ignore
+     */
+    public getLegacyClippingEnabled(): boolean {
+        const aplVersionUtils = createAplVersionUtils();
+
+        const documentAplVersion: number = aplVersionUtils.getVersionCode(this.getDocumentAplVersion());
+        const legacyClippingAplVersion: number = aplVersionUtils.getVersionCode(MAX_LEGACY_CLIPPING_APL_VERSION);
+
+        return documentAplVersion <= legacyClippingAplVersion;
+    }
+
     /**
      * @internal
      * @ignore

js/apl-html/src/components/Component.ts

@@ -29,6 +29,7 @@ import {applyAplRectToStyle, applyPaddingToStyle} from './helpers/StylesUtil';
  */
 const COMPONENT_TYPE_MAP = {
     [ComponentType.kComponentTypeContainer]: 'Container',
+    [ComponentType.kComponentTypeEditText]: 'EditText',
     [ComponentType.kComponentTypeFrame]: 'Frame',
     [ComponentType.kComponentTypeImage]: 'Image',
     [ComponentType.kComponentTypePager]: 'Pager',
@@ -46,6 +47,22 @@ const SUPPORTED_LAYOUT_DIRECTIONS = {
     [LayoutDirection.kLayoutDirectionRTL]: 'rtl'
 };
 
+const LEGACY_CLIPPING_COMPONENTS_SET = new Set([
+    ComponentType.kComponentTypeFrame,
+    ComponentType.kComponentTypePager,
+    ComponentType.kComponentTypeScrollView,
+    ComponentType.kComponentTypeSequence,
+    ComponentType.kComponentTypeGridSequence
+]);
+
+const NO_CLIPPING_COMPONENTS_SET = new Set([
+    ComponentType.kComponentTypeEditText,
+    ComponentType.kComponentTypeImage,
+    ComponentType.kComponentTypeText,
+    ComponentType.kComponentTypeTouchWrapper,
+    ComponentType.kComponentTypeVideo
+]);
+
 export const SVG_NS = 'http://www.w3.org/2000/svg';
 export const uuidv4 = require('uuid/v4');
 export const IDENTITY_TRANSFORM = 'matrix(1.000000,0.000000,0.000000,1.000000,0.000000,0.000000)';
@@ -151,6 +168,7 @@ export abstract class Component<PropsType = IGenericPropType> extends EventEmitt
             '-moz-box-sizing': 'border-box',
             'box-sizing': 'border-box'
         });
+        this.checkComponentTypeAndEnableClipping();
         this.id = component.getUniqueId();
         this.$container.attr('id', this.id);
 
@@ -415,6 +433,9 @@ export abstract class Component<PropsType = IGenericPropType> extends EventEmitt
      * Resizes child component to fit parent component when applicable
      */
     private sizeToFit(): void {
+        if (this.renderer && this.renderer.getLegacyClippingEnabled()) {
+            return;
+        }
         // adjust bounds
         const componentHasBounds = !!this.bounds;
         const componentHasParent = !!this.parent;
@@ -702,4 +723,33 @@ export abstract class Component<PropsType = IGenericPropType> extends EventEmitt
         }
         return '';
     }
+
+    /**
+     * Enable clipping if version is <= 1.5 or if component is part the legacy-clipping set.
+     * Never enable clipping for if component is part of the no-clipping set.
+     *
+     */
+    private checkComponentTypeAndEnableClipping() {
+        const componentType = this.component.getType();
+
+        // Don't clip for these components
+        if (NO_CLIPPING_COMPONENTS_SET.has(componentType)) {
+            return;
+        }
+
+        const isParentLegacy = this.parent && LEGACY_CLIPPING_COMPONENTS_SET.has(this.parent.component.getType());
+        const isLegacyComponentType: boolean = LEGACY_CLIPPING_COMPONENTS_SET.has(componentType);
+        const isLegacyAplVersion: boolean = this.renderer && this.renderer.getLegacyClippingEnabled();
+
+        if (isLegacyComponentType || isParentLegacy || !isLegacyAplVersion) {
+            this.enableClipping();
+        }
+    }
+
+    /**
+     * Enable clipping
+     */
+    protected enableClipping() {
+        this.$container.css('overflow', 'hidden');
+    }
 }

js/apl-html/src/components/Container.ts

@@ -12,10 +12,6 @@ import { Component, FactoryFunction } from './Component';
 export class Container extends Component {
     constructor(renderer: APLRenderer, component: APL.Component, factory: FactoryFunction, parent?: Component) {
         super(renderer, component, factory, parent);
-
-        this.$container.css({
-            overflow: 'hidden'
-        });
     }
 
     protected isLayout(): boolean {

js/apl-html/src/components/Frame.ts

@@ -25,8 +25,7 @@ export class Frame extends Component<IFrameProperties> {
     constructor(renderer: APLRenderer, component: APL.Component, factory: FactoryFunction, parent?: Component) {
         super(renderer, component, factory, parent);
         this.$container.css({
-            'border-style': 'solid',
-            'overflow': 'hidden'
+            'border-style': 'solid'
         });
         this.propExecutor
             (this.setBackgroundColor, PropertyKey.kPropertyBackgroundColor)

js/apl-html/src/components/MultiChildScrollable.ts

@@ -36,7 +36,6 @@ export abstract class MultiChildScrollable extends Scrollable<IMultiChildScrolla
 
     public init() {
         super.init();
-        this.$container.css('overflow', 'hidden');
     }
 
     protected allowFocus(requestedDistance: number, moveTo: HTMLDivElement) {

js/apl-html/src/components/ScrollView.ts

@@ -28,7 +28,6 @@ export class ScrollView extends Scrollable<IScrollViewProperties> {
 
     public init() {
         super.init();
-        this.$container.css('overflow', 'hidden');
     }
 
     /**