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Diffstat (limited to 'remote/webdriver-bidi/RemoteValue.sys.mjs')
| -rw-r--r-- | remote/webdriver-bidi/RemoteValue.sys.mjs | 1045 |
1 files changed, 1045 insertions, 0 deletions
diff --git a/remote/webdriver-bidi/RemoteValue.sys.mjs b/remote/webdriver-bidi/RemoteValue.sys.mjs new file mode 100644 index 0000000000..cd2f58d066 --- /dev/null +++ b/remote/webdriver-bidi/RemoteValue.sys.mjs @@ -0,0 +1,1045 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +const lazy = {}; + +ChromeUtils.defineESModuleGetters(lazy, { + assert: "chrome://remote/content/shared/webdriver/Assert.sys.mjs", + dom: "chrome://remote/content/shared/DOM.sys.mjs", + error: "chrome://remote/content/shared/webdriver/Errors.sys.mjs", + generateUUID: "chrome://remote/content/shared/UUID.sys.mjs", + Log: "chrome://remote/content/shared/Log.sys.mjs", +}); + +ChromeUtils.defineLazyGetter(lazy, "logger", () => + lazy.Log.get(lazy.Log.TYPES.WEBDRIVER_BIDI) +); + +/** + * @typedef {object} IncludeShadowTreeMode + */ + +/** + * Enum of include shadow tree modes supported by the serialization. + * + * @readonly + * @enum {IncludeShadowTreeMode} + */ +export const IncludeShadowTreeMode = { + All: "all", + None: "none", + Open: "open", +}; + +/** + * @typedef {object} OwnershipModel + */ + +/** + * Enum of ownership models supported by the serialization. + * + * @readonly + * @enum {OwnershipModel} + */ +export const OwnershipModel = { + None: "none", + Root: "root", +}; + +/** + * Extra options for deserializing remote values. + * + * @typedef {object} ExtraDeserializationOptions + * + * @property {NodeCache=} nodeCache + * The cache containing DOM node references. + * @property {Function=} emitScriptMessage + * The function to emit "script.message" event. + */ + +/** + * Extra options for serializing remote values. + * + * @typedef {object} ExtraSerializationOptions + * + * @property {NodeCache=} nodeCache + * The cache containing DOM node references. + * @property {Map<BrowsingContext, Array<string>>} seenNodeIds + * Map of browsing contexts to their seen node ids during the current + * serialization. + */ + +/** + * An object which holds the information of how + * ECMAScript objects should be serialized. + * + * @typedef {object} SerializationOptions + * + * @property {number} [maxDomDepth=0] + * Depth of a serialization of DOM Nodes. Defaults to 0. + * @property {number} [maxObjectDepth=null] + * Depth of a serialization of objects. Defaults to null. + * @property {IncludeShadowTreeMode} [includeShadowTree=IncludeShadowTreeMode.None] + * Mode of a serialization of shadow dom. Defaults to "none". + */ + +const TYPED_ARRAY_CLASSES = [ + "Uint8Array", + "Uint8ClampedArray", + "Uint16Array", + "Uint32Array", + "Int8Array", + "Int16Array", + "Int32Array", + "Float32Array", + "Float64Array", + "BigInt64Array", + "BigUint64Array", +]; + +/** + * Build the serialized RemoteValue. + * + * @returns {object} + * An object with a mandatory `type` property, and optional `handle`, + * depending on the OwnershipModel, used for the serialization and + * on the value's type. + */ +function buildSerialized(type, handle = null) { + const serialized = { type }; + + if (handle !== null) { + serialized.handle = handle; + } + + return serialized; +} + +/** + * Helper to deserialize value list. + * + * @see https://w3c.github.io/webdriver-bidi/#deserialize-value-list + * + * @param {Array} serializedValueList + * List of serialized values. + * @param {Realm} realm + * The Realm in which the value is deserialized. + * @param {ExtraDeserializationOptions} extraOptions + * Extra Remote Value deserialization options. + * + * @returns {Array} List of deserialized values. + * + * @throws {InvalidArgumentError} + * If <var>serializedValueList</var> is not an array. + */ +function deserializeValueList(serializedValueList, realm, extraOptions) { + lazy.assert.array( + serializedValueList, + `Expected "serializedValueList" to be an array, got ${serializedValueList}` + ); + + const deserializedValues = []; + + for (const item of serializedValueList) { + deserializedValues.push(deserialize(item, realm, extraOptions)); + } + + return deserializedValues; +} + +/** + * Helper to deserialize key-value list. + * + * @see https://w3c.github.io/webdriver-bidi/#deserialize-key-value-list + * + * @param {Array} serializedKeyValueList + * List of serialized key-value. + * @param {Realm} realm + * The Realm in which the value is deserialized. + * @param {ExtraDeserializationOptions} extraOptions + * Extra Remote Value deserialization options. + * + * @returns {Array} List of deserialized key-value. + * + * @throws {InvalidArgumentError} + * If <var>serializedKeyValueList</var> is not an array or + * not an array of key-value arrays. + */ +function deserializeKeyValueList(serializedKeyValueList, realm, extraOptions) { + lazy.assert.array( + serializedKeyValueList, + `Expected "serializedKeyValueList" to be an array, got ${serializedKeyValueList}` + ); + + const deserializedKeyValueList = []; + + for (const serializedKeyValue of serializedKeyValueList) { + if (!Array.isArray(serializedKeyValue) || serializedKeyValue.length != 2) { + throw new lazy.error.InvalidArgumentError( + `Expected key-value pair to be an array with 2 elements, got ${serializedKeyValue}` + ); + } + const [serializedKey, serializedValue] = serializedKeyValue; + const deserializedKey = + typeof serializedKey == "string" + ? serializedKey + : deserialize(serializedKey, realm, extraOptions); + const deserializedValue = deserialize(serializedValue, realm, extraOptions); + + deserializedKeyValueList.push([deserializedKey, deserializedValue]); + } + + return deserializedKeyValueList; +} + +/** + * Deserialize a Node as referenced by the shared unique reference. + * + * This unique reference can be shared by WebDriver clients with the WebDriver + * classic implementation (Marionette) if the reference is for an Element or + * ShadowRoot. + * + * @param {string} sharedRef + * Shared unique reference of the Node. + * @param {Realm} realm + * The Realm in which the value is deserialized. + * @param {ExtraDeserializationOptions} extraOptions + * Extra Remote Value deserialization options. + * + * @returns {Node} The deserialized DOM node. + */ +function deserializeSharedReference(sharedRef, realm, extraOptions) { + const { nodeCache } = extraOptions; + + const browsingContext = realm.browsingContext; + if (!browsingContext) { + throw new lazy.error.NoSuchNodeError("Realm isn't a Window global"); + } + + const node = nodeCache.getNode(browsingContext, sharedRef); + + if (node === null) { + throw new lazy.error.NoSuchNodeError( + `The node with the reference ${sharedRef} is not known` + ); + } + + // Bug 1819902: Instead of a browsing context check compare the origin + const isSameBrowsingContext = sharedRef => { + const nodeDetails = nodeCache.getReferenceDetails(sharedRef); + + if (nodeDetails.isTopBrowsingContext && browsingContext.parent === null) { + // As long as Navigables are not available any cross-group navigation will + // cause a swap of the current top-level browsing context. The only unique + // identifier in such a case is the browser id the top-level browsing + // context actually lives in. + return nodeDetails.browserId === browsingContext.browserId; + } + + return nodeDetails.browsingContextId === browsingContext.id; + }; + + if (!isSameBrowsingContext(sharedRef)) { + return null; + } + + return node; +} + +/** + * Deserialize a local value. + * + * @see https://w3c.github.io/webdriver-bidi/#deserialize-local-value + * + * @param {object} serializedValue + * Value of any type to be deserialized. + * @param {Realm} realm + * The Realm in which the value is deserialized. + * @param {ExtraDeserializationOptions} extraOptions + * Extra Remote Value deserialization options. + * + * @returns {object} Deserialized representation of the value. + */ +export function deserialize(serializedValue, realm, extraOptions) { + const { handle, sharedId, type, value } = serializedValue; + + // With a shared id present deserialize as node reference. + if (sharedId !== undefined) { + lazy.assert.string( + sharedId, + `Expected "sharedId" to be a string, got ${sharedId}` + ); + + return deserializeSharedReference(sharedId, realm, extraOptions); + } + + // With a handle present deserialize as remote reference. + if (handle !== undefined) { + lazy.assert.string( + handle, + `Expected "handle" to be a string, got ${handle}` + ); + + const object = realm.getObjectForHandle(handle); + if (!object) { + throw new lazy.error.NoSuchHandleError( + `Unable to find an object reference for "handle" ${handle}` + ); + } + + return object; + } + + lazy.assert.string(type, `Expected "type" to be a string, got ${type}`); + + // Primitive protocol values + switch (type) { + case "undefined": + return undefined; + case "null": + return null; + case "string": + lazy.assert.string( + value, + `Expected "value" to be a string, got ${value}` + ); + return value; + case "number": + // If value is already a number return its value. + if (typeof value === "number") { + return value; + } + + // Otherwise it has to be one of the special strings + lazy.assert.in( + value, + ["NaN", "-0", "Infinity", "-Infinity"], + `Expected "value" to be one of "NaN", "-0", "Infinity", "-Infinity", got ${value}` + ); + return Number(value); + case "boolean": + lazy.assert.boolean( + value, + `Expected "value" to be a boolean, got ${value}` + ); + return value; + case "bigint": + lazy.assert.string( + value, + `Expected "value" to be a string, got ${value}` + ); + try { + return BigInt(value); + } catch (e) { + throw new lazy.error.InvalidArgumentError( + `Failed to deserialize value as BigInt: ${value}` + ); + } + + // Script channel + case "channel": { + const channel = message => + extraOptions.emitScriptMessage(realm, value, message); + return realm.cloneIntoRealm(channel); + } + + // Non-primitive protocol values + case "array": + const array = realm.cloneIntoRealm([]); + deserializeValueList(value, realm, extraOptions).forEach(v => + array.push(v) + ); + return array; + case "date": + // We want to support only Date Time String format, + // check if the value follows it. + if (!ChromeUtils.isISOStyleDate(value)) { + throw new lazy.error.InvalidArgumentError( + `Expected "value" for Date to be a Date Time string, got ${value}` + ); + } + + return realm.cloneIntoRealm(new Date(value)); + case "map": + const map = realm.cloneIntoRealm(new Map()); + deserializeKeyValueList(value, realm, extraOptions).forEach(([k, v]) => + map.set(k, v) + ); + + return map; + case "object": + const object = realm.cloneIntoRealm({}); + deserializeKeyValueList(value, realm, extraOptions).forEach( + ([k, v]) => (object[k] = v) + ); + return object; + case "regexp": + lazy.assert.object( + value, + `Expected "value" for RegExp to be an object, got ${value}` + ); + const { pattern, flags } = value; + lazy.assert.string( + pattern, + `Expected "pattern" for RegExp to be a string, got ${pattern}` + ); + if (flags !== undefined) { + lazy.assert.string( + flags, + `Expected "flags" for RegExp to be a string, got ${flags}` + ); + } + try { + return realm.cloneIntoRealm(new RegExp(pattern, flags)); + } catch (e) { + throw new lazy.error.InvalidArgumentError( + `Failed to deserialize value as RegExp: ${value}` + ); + } + case "set": + const set = realm.cloneIntoRealm(new Set()); + deserializeValueList(value, realm, extraOptions).forEach(v => set.add(v)); + return set; + } + + lazy.logger.warn(`Unsupported type for local value ${type}`); + return undefined; +} + +/** + * Helper to retrieve the handle id for a given object, for the provided realm + * and ownership type. + * + * See https://w3c.github.io/webdriver-bidi/#handle-for-an-object + * + * @param {Realm} realm + * The Realm from which comes the value being serialized. + * @param {OwnershipModel} ownershipType + * The ownership model to use for this serialization. + * @param {object} object + * The object being serialized. + * + * @returns {string} The unique handle id for the object. Will be null if the + * Ownership type is "none". + */ +function getHandleForObject(realm, ownershipType, object) { + if (ownershipType === OwnershipModel.None) { + return null; + } + return realm.getHandleForObject(object); +} + +/** + * Gets or creates a new shared unique reference for the DOM node. + * + * This unique reference can be shared by WebDriver clients with the WebDriver + * classic implementation (Marionette) if the reference is for an Element or + * ShadowRoot. + * + * @param {Node} node + * Node to create the unique reference for. + * @param {ExtraSerializationOptions} extraOptions + * Extra Remote Value serialization options. + * + * @returns {string} + * Shared unique reference for the Node. + */ +function getSharedIdForNode(node, extraOptions) { + const { nodeCache, seenNodeIds } = extraOptions; + + if (!Node.isInstance(node)) { + return null; + } + + const browsingContext = node.ownerGlobal.browsingContext; + if (!browsingContext) { + return null; + } + + return nodeCache.getOrCreateNodeReference(node, seenNodeIds); +} + +/** + * Helper to serialize an Array-like object. + * + * @see https://w3c.github.io/webdriver-bidi/#serialize-an-array-like + * + * @param {string} production + * Type of object + * @param {string} handleId + * The unique id of the <var>value</var>. + * @param {boolean} knownObject + * Indicates if the <var>value</var> has already been serialized. + * @param {object} value + * The Array-like object to serialize. + * @param {SerializationOptions} serializationOptions + * Options which define how ECMAScript objects should be serialized. + * @param {OwnershipModel} ownershipType + * The ownership model to use for this serialization. + * @param {Map} serializationInternalMap + * Map of internal ids. + * @param {Realm} realm + * The Realm from which comes the value being serialized. + * @param {ExtraSerializationOptions} extraOptions + * Extra Remote Value serialization options. + * + * @returns {object} Object for serialized values. + */ +function serializeArrayLike( + production, + handleId, + knownObject, + value, + serializationOptions, + ownershipType, + serializationInternalMap, + realm, + extraOptions +) { + const serialized = buildSerialized(production, handleId); + setInternalIdsIfNeeded(serializationInternalMap, serialized, value); + + if (!knownObject && serializationOptions.maxObjectDepth !== 0) { + serialized.value = serializeList( + value, + serializationOptions, + ownershipType, + serializationInternalMap, + realm, + extraOptions + ); + } + + return serialized; +} + +/** + * Helper to serialize as a list. + * + * @see https://w3c.github.io/webdriver-bidi/#serialize-as-a-list + * + * @param {Iterable} iterable + * List of values to be serialized. + * @param {SerializationOptions} serializationOptions + * Options which define how ECMAScript objects should be serialized. + * @param {OwnershipModel} ownershipType + * The ownership model to use for this serialization. + * @param {Map} serializationInternalMap + * Map of internal ids. + * @param {Realm} realm + * The Realm from which comes the value being serialized. + * @param {ExtraSerializationOptions} extraOptions + * Extra Remote Value serialization options. + * + * @returns {Array} List of serialized values. + */ +function serializeList( + iterable, + serializationOptions, + ownershipType, + serializationInternalMap, + realm, + extraOptions +) { + const { maxObjectDepth } = serializationOptions; + const serialized = []; + const childSerializationOptions = { + ...serializationOptions, + }; + if (maxObjectDepth !== null) { + childSerializationOptions.maxObjectDepth = maxObjectDepth - 1; + } + + for (const item of iterable) { + serialized.push( + serialize( + item, + childSerializationOptions, + ownershipType, + serializationInternalMap, + realm, + extraOptions + ) + ); + } + + return serialized; +} + +/** + * Helper to serialize as a mapping. + * + * @see https://w3c.github.io/webdriver-bidi/#serialize-as-a-mapping + * + * @param {Iterable} iterable + * List of values to be serialized. + * @param {SerializationOptions} serializationOptions + * Options which define how ECMAScript objects should be serialized. + * @param {OwnershipModel} ownershipType + * The ownership model to use for this serialization. + * @param {Map} serializationInternalMap + * Map of internal ids. + * @param {Realm} realm + * The Realm from which comes the value being serialized. + * @param {ExtraSerializationOptions} extraOptions + * Extra Remote Value serialization options. + * + * @returns {Array} List of serialized values. + */ +function serializeMapping( + iterable, + serializationOptions, + ownershipType, + serializationInternalMap, + realm, + extraOptions +) { + const { maxObjectDepth } = serializationOptions; + const serialized = []; + const childSerializationOptions = { + ...serializationOptions, + }; + if (maxObjectDepth !== null) { + childSerializationOptions.maxObjectDepth = maxObjectDepth - 1; + } + + for (const [key, item] of iterable) { + const serializedKey = + typeof key == "string" + ? key + : serialize( + key, + childSerializationOptions, + ownershipType, + serializationInternalMap, + realm, + extraOptions + ); + const serializedValue = serialize( + item, + childSerializationOptions, + ownershipType, + serializationInternalMap, + realm, + extraOptions + ); + + serialized.push([serializedKey, serializedValue]); + } + + return serialized; +} + +/** + * Helper to serialize as a Node. + * + * @param {Node} node + * Node to be serialized. + * @param {SerializationOptions} serializationOptions + * Options which define how ECMAScript objects should be serialized. + * @param {OwnershipModel} ownershipType + * The ownership model to use for this serialization. + * @param {Map} serializationInternalMap + * Map of internal ids. + * @param {Realm} realm + * The Realm from which comes the value being serialized. + * @param {ExtraSerializationOptions} extraOptions + * Extra Remote Value serialization options. + * + * @returns {object} Serialized value. + */ +function serializeNode( + node, + serializationOptions, + ownershipType, + serializationInternalMap, + realm, + extraOptions +) { + const { includeShadowTree, maxDomDepth } = serializationOptions; + const isAttribute = Attr.isInstance(node); + const isElement = Element.isInstance(node); + + const serialized = { + nodeType: node.nodeType, + }; + + if (node.nodeValue !== null) { + serialized.nodeValue = node.nodeValue; + } + + if (isElement || isAttribute) { + serialized.localName = node.localName; + serialized.namespaceURI = node.namespaceURI; + } + + serialized.childNodeCount = node.childNodes.length; + if ( + maxDomDepth !== 0 && + (!lazy.dom.isShadowRoot(node) || + (includeShadowTree === IncludeShadowTreeMode.Open && + node.mode === "open") || + includeShadowTree === IncludeShadowTreeMode.All) + ) { + const children = []; + const childSerializationOptions = { + ...serializationOptions, + }; + if (maxDomDepth !== null) { + childSerializationOptions.maxDomDepth = maxDomDepth - 1; + } + for (const child of node.childNodes) { + children.push( + serialize( + child, + childSerializationOptions, + ownershipType, + serializationInternalMap, + realm, + extraOptions + ) + ); + } + + serialized.children = children; + } + + if (isElement) { + serialized.attributes = [...node.attributes].reduce((map, attr) => { + map[attr.name] = attr.value; + return map; + }, {}); + + const shadowRoot = node.openOrClosedShadowRoot; + serialized.shadowRoot = null; + if (shadowRoot !== null) { + serialized.shadowRoot = serialize( + shadowRoot, + serializationOptions, + ownershipType, + serializationInternalMap, + realm, + extraOptions + ); + } + } + + if (lazy.dom.isShadowRoot(node)) { + serialized.mode = node.mode; + } + + return serialized; +} + +/** + * Serialize a value as a remote value. + * + * @see https://w3c.github.io/webdriver-bidi/#serialize-as-a-remote-value + * + * @param {object} value + * Value of any type to be serialized. + * @param {SerializationOptions} serializationOptions + * Options which define how ECMAScript objects should be serialized. + * @param {OwnershipModel} ownershipType + * The ownership model to use for this serialization. + * @param {Map} serializationInternalMap + * Map of internal ids. + * @param {Realm} realm + * The Realm from which comes the value being serialized. + * @param {ExtraSerializationOptions} extraOptions + * Extra Remote Value serialization options. + * + * @returns {object} Serialized representation of the value. + */ +export function serialize( + value, + serializationOptions, + ownershipType, + serializationInternalMap, + realm, + extraOptions +) { + const { maxObjectDepth } = serializationOptions; + const type = typeof value; + + // Primitive protocol values + if (type == "undefined") { + return { type }; + } else if (Object.is(value, null)) { + return { type: "null" }; + } else if (Object.is(value, NaN)) { + return { type: "number", value: "NaN" }; + } else if (Object.is(value, -0)) { + return { type: "number", value: "-0" }; + } else if (Object.is(value, Infinity)) { + return { type: "number", value: "Infinity" }; + } else if (Object.is(value, -Infinity)) { + return { type: "number", value: "-Infinity" }; + } else if (type == "bigint") { + return { type, value: value.toString() }; + } else if (["boolean", "number", "string"].includes(type)) { + return { type, value }; + } + + const handleId = getHandleForObject(realm, ownershipType, value); + const knownObject = serializationInternalMap.has(value); + + // Set the OwnershipModel to use for all complex object serializations. + ownershipType = OwnershipModel.None; + + // Remote values + + // symbols are primitive JS values which can only be serialized + // as remote values. + if (type == "symbol") { + return buildSerialized("symbol", handleId); + } + + // All other remote values are non-primitives and their + // className can be extracted with ChromeUtils.getClassName + const className = ChromeUtils.getClassName(value); + if (["Array", "HTMLCollection", "NodeList"].includes(className)) { + return serializeArrayLike( + className.toLowerCase(), + handleId, + knownObject, + value, + serializationOptions, + ownershipType, + serializationInternalMap, + realm, + extraOptions + ); + } else if (className == "RegExp") { + const serialized = buildSerialized("regexp", handleId); + serialized.value = { pattern: value.source, flags: value.flags }; + return serialized; + } else if (className == "Date") { + const serialized = buildSerialized("date", handleId); + serialized.value = value.toISOString(); + return serialized; + } else if (className == "Map") { + const serialized = buildSerialized("map", handleId); + setInternalIdsIfNeeded(serializationInternalMap, serialized, value); + + if (!knownObject && maxObjectDepth !== 0) { + serialized.value = serializeMapping( + value.entries(), + serializationOptions, + ownershipType, + serializationInternalMap, + realm, + extraOptions + ); + } + return serialized; + } else if (className == "Set") { + const serialized = buildSerialized("set", handleId); + setInternalIdsIfNeeded(serializationInternalMap, serialized, value); + + if (!knownObject && maxObjectDepth !== 0) { + serialized.value = serializeList( + value.values(), + serializationOptions, + ownershipType, + serializationInternalMap, + realm, + extraOptions + ); + } + return serialized; + } else if ( + ["ArrayBuffer", "Function", "Promise", "WeakMap", "WeakSet"].includes( + className + ) + ) { + return buildSerialized(className.toLowerCase(), handleId); + } else if (className.includes("Generator")) { + return buildSerialized("generator", handleId); + } else if (lazy.error.isError(value)) { + return buildSerialized("error", handleId); + } else if (Cu.isProxy(value)) { + return buildSerialized("proxy", handleId); + } else if (TYPED_ARRAY_CLASSES.includes(className)) { + return buildSerialized("typedarray", handleId); + } else if (Node.isInstance(value)) { + const serialized = buildSerialized("node", handleId); + + value = Cu.unwaiveXrays(value); + + // Get or create the shared id for WebDriver classic compat from the node. + const sharedId = getSharedIdForNode(value, extraOptions); + if (sharedId !== null) { + serialized.sharedId = sharedId; + } + + setInternalIdsIfNeeded(serializationInternalMap, serialized, value); + + if (!knownObject) { + serialized.value = serializeNode( + value, + serializationOptions, + ownershipType, + serializationInternalMap, + realm, + extraOptions + ); + } + + return serialized; + } else if (Window.isInstance(value)) { + const serialized = buildSerialized("window", handleId); + const window = Cu.unwaiveXrays(value); + + if (window.browsingContext.parent == null) { + serialized.value = { + context: window.browsingContext.browserId.toString(), + isTopBrowsingContext: true, + }; + } else { + serialized.value = { + context: window.browsingContext.id.toString(), + }; + } + + return serialized; + } else if (ChromeUtils.isDOMObject(value)) { + const serialized = buildSerialized("object", handleId); + return serialized; + } + + // Otherwise serialize the JavaScript object as generic object. + const serialized = buildSerialized("object", handleId); + setInternalIdsIfNeeded(serializationInternalMap, serialized, value); + + if (!knownObject && maxObjectDepth !== 0) { + serialized.value = serializeMapping( + Object.entries(value), + serializationOptions, + ownershipType, + serializationInternalMap, + realm, + extraOptions + ); + } + return serialized; +} + +/** + * Set default serialization options. + * + * @param {SerializationOptions} options + * Options which define how ECMAScript objects should be serialized. + * @returns {SerializationOptions} + * Serialiation options with default value added. + */ +export function setDefaultSerializationOptions(options = {}) { + const serializationOptions = { ...options }; + if (!("maxDomDepth" in serializationOptions)) { + serializationOptions.maxDomDepth = 0; + } + if (!("maxObjectDepth" in serializationOptions)) { + serializationOptions.maxObjectDepth = null; + } + if (!("includeShadowTree" in serializationOptions)) { + serializationOptions.includeShadowTree = IncludeShadowTreeMode.None; + } + + return serializationOptions; +} + +/** + * Set default values and assert if serialization options have + * expected types. + * + * @param {SerializationOptions} options + * Options which define how ECMAScript objects should be serialized. + * @returns {SerializationOptions} + * Serialiation options with default value added. + */ +export function setDefaultAndAssertSerializationOptions(options = {}) { + lazy.assert.object(options); + + const serializationOptions = setDefaultSerializationOptions(options); + + const { includeShadowTree, maxDomDepth, maxObjectDepth } = + serializationOptions; + + if (maxDomDepth !== null) { + lazy.assert.positiveInteger(maxDomDepth); + } + if (maxObjectDepth !== null) { + lazy.assert.positiveInteger(maxObjectDepth); + } + const includeShadowTreeModesValues = Object.values(IncludeShadowTreeMode); + lazy.assert.that( + includeShadowTree => + includeShadowTreeModesValues.includes(includeShadowTree), + `includeShadowTree ${includeShadowTree} doesn't match allowed values "${includeShadowTreeModesValues.join( + "/" + )}"` + )(includeShadowTree); + + return serializationOptions; +} + +/** + * Set the internalId property of a provided serialized RemoteValue, + * and potentially of a previously created serialized RemoteValue, + * corresponding to the same provided object. + * + * @see https://w3c.github.io/webdriver-bidi/#set-internal-ids-if-needed + * + * @param {Map} serializationInternalMap + * Map of objects to remote values. + * @param {object} remoteValue + * A serialized RemoteValue for the provided object. + * @param {object} object + * Object of any type to be serialized. + */ +function setInternalIdsIfNeeded(serializationInternalMap, remoteValue, object) { + if (!serializationInternalMap.has(object)) { + // If the object was not tracked yet in the current serialization, add + // a new entry in the serialization internal map. An internal id will only + // be generated if the same object is encountered again. + serializationInternalMap.set(object, remoteValue); + } else { + // This is at least the second time this object is encountered, retrieve the + // original remote value stored for this object. + const previousRemoteValue = serializationInternalMap.get(object); + + if (!previousRemoteValue.internalId) { + // If the original remote value has no internal id yet, generate a uuid + // and update the internalId of the original remote value with it. + previousRemoteValue.internalId = lazy.generateUUID(); + } + + // Copy the internalId of the original remote value to the new remote value. + remoteValue.internalId = previousRemoteValue.internalId; + } +} + +/** + * Safely stringify a value. + * + * @param {object} obj + * Value of any type to be stringified. + * + * @returns {string} String representation of the value. + */ +export function stringify(obj) { + let text; + try { + text = + obj !== null && typeof obj === "object" ? obj.toString() : String(obj); + } catch (e) { + // The error-case will also be handled in `finally {}`. + } finally { + if (typeof text != "string") { + text = Object.prototype.toString.apply(obj); + } + } + + return text; +} |