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--- a/toolkit/components/extensions/Schemas.jsm
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@@ -1,2143 +0,0 @@
-/* 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/. */
-
-"use strict";
-
-const Ci = Components.interfaces;
-const Cc = Components.classes;
-const Cu = Components.utils;
-const Cr = Components.results;
-
-const global = this;
-
-Cu.importGlobalProperties(["URL"]);
-
-Cu.import("resource://gre/modules/NetUtil.jsm");
-Cu.import("resource://gre/modules/Services.jsm");
-Cu.import("resource://gre/modules/XPCOMUtils.jsm");
-
-Cu.import("resource://gre/modules/ExtensionUtils.jsm");
-var {
- DefaultMap,
- instanceOf,
-} = ExtensionUtils;
-
-class DeepMap extends DefaultMap {
- constructor() {
- super(() => new DeepMap());
- }
-
- getPath(...keys) {
- return keys.reduce((map, prop) => map.get(prop), this);
- }
-}
-
-XPCOMUtils.defineLazyServiceGetter(this, "contentPolicyService",
- "@mozilla.org/addons/content-policy;1",
- "nsIAddonContentPolicy");
-
-this.EXPORTED_SYMBOLS = ["Schemas"];
-
-/* globals Schemas, URL */
-
-function readJSON(url) {
- return new Promise((resolve, reject) => {
- NetUtil.asyncFetch({uri: url, loadUsingSystemPrincipal: true}, (inputStream, status) => {
- if (!Components.isSuccessCode(status)) {
- // Convert status code to a string
- let e = Components.Exception("", status);
- reject(new Error(`Error while loading '${url}' (${e.name})`));
- return;
- }
- try {
- let text = NetUtil.readInputStreamToString(inputStream, inputStream.available());
-
- // Chrome JSON files include a license comment that we need to
- // strip off for this to be valid JSON. As a hack, we just
- // look for the first '[' character, which signals the start
- // of the JSON content.
- let index = text.indexOf("[");
- text = text.slice(index);
-
- resolve(JSON.parse(text));
- } catch (e) {
- reject(e);
- }
- });
- });
-}
-
-/**
- * Defines a lazy getter for the given property on the given object. Any
- * security wrappers are waived on the object before the property is
- * defined, and the getter and setter methods are wrapped for the target
- * scope.
- *
- * The given getter function is guaranteed to be called only once, even
- * if the target scope retrieves the wrapped getter from the property
- * descriptor and calls it directly.
- *
- * @param {object} object
- * The object on which to define the getter.
- * @param {string|Symbol} prop
- * The property name for which to define the getter.
- * @param {function} getter
- * The function to call in order to generate the final property
- * value.
- */
-function exportLazyGetter(object, prop, getter) {
- object = Cu.waiveXrays(object);
-
- let redefine = value => {
- if (value === undefined) {
- delete object[prop];
- } else {
- Object.defineProperty(object, prop, {
- enumerable: true,
- configurable: true,
- writable: true,
- value,
- });
- }
-
- getter = null;
-
- return value;
- };
-
- Object.defineProperty(object, prop, {
- enumerable: true,
- configurable: true,
-
- get: Cu.exportFunction(function() {
- return redefine(getter.call(this));
- }, object),
-
- set: Cu.exportFunction(value => {
- redefine(value);
- }, object),
- });
-}
-
-const POSTPROCESSORS = {
- convertImageDataToURL(imageData, context) {
- let document = context.cloneScope.document;
- let canvas = document.createElementNS("http://www.w3.org/1999/xhtml", "canvas");
- canvas.width = imageData.width;
- canvas.height = imageData.height;
- canvas.getContext("2d").putImageData(imageData, 0, 0);
-
- return canvas.toDataURL("image/png");
- },
-};
-
-// Parses a regular expression, with support for the Python extended
-// syntax that allows setting flags by including the string (?im)
-function parsePattern(pattern) {
- let flags = "";
- let match = /^\(\?([im]*)\)(.*)/.exec(pattern);
- if (match) {
- [, flags, pattern] = match;
- }
- return new RegExp(pattern, flags);
-}
-
-function getValueBaseType(value) {
- let t = typeof(value);
- if (t == "object") {
- if (value === null) {
- return "null";
- } else if (Array.isArray(value)) {
- return "array";
- } else if (Object.prototype.toString.call(value) == "[object ArrayBuffer]") {
- return "binary";
- }
- } else if (t == "number") {
- if (value % 1 == 0) {
- return "integer";
- }
- }
- return t;
-}
-
-// Methods of Context that are used by Schemas.normalize. These methods can be
-// overridden at the construction of Context.
-const CONTEXT_FOR_VALIDATION = [
- "checkLoadURL",
- "hasPermission",
- "logError",
-];
-
-// Methods of Context that are used by Schemas.inject.
-// Callers of Schemas.inject should implement all of these methods.
-const CONTEXT_FOR_INJECTION = [
- ...CONTEXT_FOR_VALIDATION,
- "shouldInject",
- "getImplementation",
-];
-
-/**
- * A context for schema validation and error reporting. This class is only used
- * internally within Schemas.
- */
-class Context {
- /**
- * @param {object} params Provides the implementation of this class.
- * @param {Array<string>} overridableMethods
- */
- constructor(params, overridableMethods = CONTEXT_FOR_VALIDATION) {
- this.params = params;
-
- this.path = [];
- this.preprocessors = {
- localize(value, context) {
- return value;
- },
- };
- this.postprocessors = POSTPROCESSORS;
- this.isChromeCompat = false;
-
- this.currentChoices = new Set();
- this.choicePathIndex = 0;
-
- for (let method of overridableMethods) {
- if (method in params) {
- this[method] = params[method].bind(params);
- }
- }
-
- let props = ["preprocessors", "isChromeCompat"];
- for (let prop of props) {
- if (prop in params) {
- if (prop in this && typeof this[prop] == "object") {
- Object.assign(this[prop], params[prop]);
- } else {
- this[prop] = params[prop];
- }
- }
- }
- }
-
- get choicePath() {
- let path = this.path.slice(this.choicePathIndex);
- return path.join(".");
- }
-
- get cloneScope() {
- return this.params.cloneScope;
- }
-
- get url() {
- return this.params.url;
- }
-
- get principal() {
- return this.params.principal || Services.scriptSecurityManager.createNullPrincipal({});
- }
-
- /**
- * Checks whether `url` may be loaded by the extension in this context.
- *
- * @param {string} url The URL that the extension wished to load.
- * @returns {boolean} Whether the context may load `url`.
- */
- checkLoadURL(url) {
- let ssm = Services.scriptSecurityManager;
- try {
- ssm.checkLoadURIStrWithPrincipal(this.principal, url,
- ssm.DISALLOW_INHERIT_PRINCIPAL);
- } catch (e) {
- return false;
- }
- return true;
- }
-
- /**
- * Checks whether this context has the given permission.
- *
- * @param {string} permission
- * The name of the permission to check.
- *
- * @returns {boolean} True if the context has the given permission.
- */
- hasPermission(permission) {
- return false;
- }
-
- /**
- * Returns an error result object with the given message, for return
- * by Type normalization functions.
- *
- * If the context has a `currentTarget` value, this is prepended to
- * the message to indicate the location of the error.
- *
- * @param {string} errorMessage
- * The error message which will be displayed when this is the
- * only possible matching schema.
- * @param {string} choicesMessage
- * The message describing the valid what constitutes a valid
- * value for this schema, which will be displayed when multiple
- * schema choices are available and none match.
- *
- * A caller may pass `null` to prevent a choice from being
- * added, but this should *only* be done from code processing a
- * choices type.
- * @returns {object}
- */
- error(errorMessage, choicesMessage = undefined) {
- if (choicesMessage !== null) {
- let {choicePath} = this;
- if (choicePath) {
- choicesMessage = `.${choicePath} must ${choicesMessage}`;
- }
-
- this.currentChoices.add(choicesMessage);
- }
-
- if (this.currentTarget) {
- return {error: `Error processing ${this.currentTarget}: ${errorMessage}`};
- }
- return {error: errorMessage};
- }
-
- /**
- * Creates an `Error` object belonging to the current unprivileged
- * scope. If there is no unprivileged scope associated with this
- * context, the message is returned as a string.
- *
- * If the context has a `currentTarget` value, this is prepended to
- * the message, in the same way as for the `error` method.
- *
- * @param {string} message
- * @returns {Error}
- */
- makeError(message) {
- let {error} = this.error(message);
- if (this.cloneScope) {
- return new this.cloneScope.Error(error);
- }
- return error;
- }
-
- /**
- * Logs the given error to the console. May be overridden to enable
- * custom logging.
- *
- * @param {Error|string} error
- */
- logError(error) {
- Cu.reportError(error);
- }
-
- /**
- * Returns the name of the value currently being normalized. For a
- * nested object, this is usually approximately equivalent to the
- * JavaScript property accessor for that property. Given:
- *
- * { foo: { bar: [{ baz: x }] } }
- *
- * When processing the value for `x`, the currentTarget is
- * 'foo.bar.0.baz'
- */
- get currentTarget() {
- return this.path.join(".");
- }
-
- /**
- * Executes the given callback, and returns an array of choice strings
- * passed to {@see #error} during its execution.
- *
- * @param {function} callback
- * @returns {object}
- * An object with a `result` property containing the return
- * value of the callback, and a `choice` property containing
- * an array of choices.
- */
- withChoices(callback) {
- let {currentChoices, choicePathIndex} = this;
-
- let choices = new Set();
- this.currentChoices = choices;
- this.choicePathIndex = this.path.length;
-
- try {
- let result = callback();
-
- return {result, choices: Array.from(choices)};
- } finally {
- this.currentChoices = currentChoices;
- this.choicePathIndex = choicePathIndex;
-
- choices = Array.from(choices);
- if (choices.length == 1) {
- currentChoices.add(choices[0]);
- } else if (choices.length) {
- let n = choices.length - 1;
- choices[n] = `or ${choices[n]}`;
-
- this.error(null, `must either [${choices.join(", ")}]`);
- }
- }
- }
-
- /**
- * Appends the given component to the `currentTarget` path to indicate
- * that it is being processed, calls the given callback function, and
- * then restores the original path.
- *
- * This is used to identify the path of the property being processed
- * when reporting type errors.
- *
- * @param {string} component
- * @param {function} callback
- * @returns {*}
- */
- withPath(component, callback) {
- this.path.push(component);
- try {
- return callback();
- } finally {
- this.path.pop();
- }
- }
-}
-
-/**
- * Holds methods that run the actual implementation of the extension APIs. These
- * methods are only called if the extension API invocation matches the signature
- * as defined in the schema. Otherwise an error is reported to the context.
- */
-class InjectionContext extends Context {
- constructor(params) {
- super(params, CONTEXT_FOR_INJECTION);
- }
-
- /**
- * Check whether the API should be injected.
- *
- * @abstract
- * @param {string} namespace The namespace of the API. This may contain dots,
- * e.g. in the case of "devtools.inspectedWindow".
- * @param {string} [name] The name of the property in the namespace.
- * `null` if we are checking whether the namespace should be injected.
- * @param {Array<string>} allowedContexts A list of additional contexts in which
- * this API should be available. May include any of:
- * "main" - The main chrome browser process.
- * "addon" - An addon process.
- * "content" - A content process.
- * @returns {boolean} Whether the API should be injected.
- */
- shouldInject(namespace, name, allowedContexts) {
- throw new Error("Not implemented");
- }
-
- /**
- * Generate the implementation for `namespace`.`name`.
- *
- * @abstract
- * @param {string} namespace The full path to the namespace of the API, minus
- * the name of the method or property. E.g. "storage.local".
- * @param {string} name The name of the method, property or event.
- * @returns {SchemaAPIInterface} The implementation of the API.
- */
- getImplementation(namespace, name) {
- throw new Error("Not implemented");
- }
-}
-
-/**
- * The methods in this singleton represent the "format" specifier for
- * JSON Schema string types.
- *
- * Each method either returns a normalized version of the original
- * value, or throws an error if the value is not valid for the given
- * format.
- */
-const FORMATS = {
- url(string, context) {
- let url = new URL(string).href;
-
- if (!context.checkLoadURL(url)) {
- throw new Error(`Access denied for URL ${url}`);
- }
- return url;
- },
-
- relativeUrl(string, context) {
- if (!context.url) {
- // If there's no context URL, return relative URLs unresolved, and
- // skip security checks for them.
- try {
- new URL(string);
- } catch (e) {
- return string;
- }
- }
-
- let url = new URL(string, context.url).href;
-
- if (!context.checkLoadURL(url)) {
- throw new Error(`Access denied for URL ${url}`);
- }
- return url;
- },
-
- strictRelativeUrl(string, context) {
- // Do not accept a string which resolves as an absolute URL, or any
- // protocol-relative URL.
- if (!string.startsWith("//")) {
- try {
- new URL(string);
- } catch (e) {
- return FORMATS.relativeUrl(string, context);
- }
- }
-
- throw new SyntaxError(`String ${JSON.stringify(string)} must be a relative URL`);
- },
-
- contentSecurityPolicy(string, context) {
- let error = contentPolicyService.validateAddonCSP(string);
- if (error != null) {
- throw new SyntaxError(error);
- }
- return string;
- },
-
- date(string, context) {
- // A valid ISO 8601 timestamp.
- const PATTERN = /^\d{4}-\d{2}-\d{2}(T\d{2}:\d{2}:\d{2}(\.\d{3})?(Z|([-+]\d{2}:?\d{2})))?$/;
- if (!PATTERN.test(string)) {
- throw new Error(`Invalid date string ${string}`);
- }
- // Our pattern just checks the format, we could still have invalid
- // values (e.g., month=99 or month=02 and day=31). Let the Date
- // constructor do the dirty work of validating.
- if (isNaN(new Date(string))) {
- throw new Error(`Invalid date string ${string}`);
- }
- return string;
- },
-};
-
-// Schema files contain namespaces, and each namespace contains types,
-// properties, functions, and events. An Entry is a base class for
-// types, properties, functions, and events.
-class Entry {
- constructor(schema = {}) {
- /**
- * If set to any value which evaluates as true, this entry is
- * deprecated, and any access to it will result in a deprecation
- * warning being logged to the browser console.
- *
- * If the value is a string, it will be appended to the deprecation
- * message. If it contains the substring "${value}", it will be
- * replaced with a string representation of the value being
- * processed.
- *
- * If the value is any other truthy value, a generic deprecation
- * message will be emitted.
- */
- this.deprecated = false;
- if ("deprecated" in schema) {
- this.deprecated = schema.deprecated;
- }
-
- /**
- * @property {string} [preprocessor]
- * If set to a string value, and a preprocessor of the same is
- * defined in the validation context, it will be applied to this
- * value prior to any normalization.
- */
- this.preprocessor = schema.preprocess || null;
-
- /**
- * @property {string} [postprocessor]
- * If set to a string value, and a postprocessor of the same is
- * defined in the validation context, it will be applied to this
- * value after any normalization.
- */
- this.postprocessor = schema.postprocess || null;
-
- /**
- * @property {Array<string>} allowedContexts A list of allowed contexts
- * to consider before generating the API.
- * These are not parsed by the schema, but passed to `shouldInject`.
- */
- this.allowedContexts = schema.allowedContexts || [];
- }
-
- /**
- * Preprocess the given value with the preprocessor declared in
- * `preprocessor`.
- *
- * @param {*} value
- * @param {Context} context
- * @returns {*}
- */
- preprocess(value, context) {
- if (this.preprocessor) {
- return context.preprocessors[this.preprocessor](value, context);
- }
- return value;
- }
-
- /**
- * Postprocess the given result with the postprocessor declared in
- * `postprocessor`.
- *
- * @param {object} result
- * @param {Context} context
- * @returns {object}
- */
- postprocess(result, context) {
- if (result.error || !this.postprocessor) {
- return result;
- }
-
- let value = context.postprocessors[this.postprocessor](result.value, context);
- return {value};
- }
-
- /**
- * Logs a deprecation warning for this entry, based on the value of
- * its `deprecated` property.
- *
- * @param {Context} context
- * @param {value} [value]
- */
- logDeprecation(context, value = null) {
- let message = "This property is deprecated";
- if (typeof(this.deprecated) == "string") {
- message = this.deprecated;
- if (message.includes("${value}")) {
- try {
- value = JSON.stringify(value);
- } catch (e) {
- value = String(value);
- }
- message = message.replace(/\$\{value\}/g, () => value);
- }
- }
-
- context.logError(context.makeError(message));
- }
-
- /**
- * Checks whether the entry is deprecated and, if so, logs a
- * deprecation message.
- *
- * @param {Context} context
- * @param {value} [value]
- */
- checkDeprecated(context, value = null) {
- if (this.deprecated) {
- this.logDeprecation(context, value);
- }
- }
-
- /**
- * Injects JS values for the entry into the extension API
- * namespace. The default implementation is to do nothing.
- * `context` is used to call the actual implementation
- * of a given function or event.
- *
- * @param {Array<string>} path The API path, e.g. `["storage", "local"]`.
- * @param {string} name The method name, e.g. "get".
- * @param {object} dest The object where `path`.`name` should be stored.
- * @param {InjectionContext} context
- */
- inject(path, name, dest, context) {
- }
-}
-
-// Corresponds either to a type declared in the "types" section of the
-// schema or else to any type object used throughout the schema.
-class Type extends Entry {
- /**
- * @property {Array<string>} EXTRA_PROPERTIES
- * An array of extra properties which may be present for
- * schemas of this type.
- */
- static get EXTRA_PROPERTIES() {
- return ["description", "deprecated", "preprocess", "postprocess", "allowedContexts"];
- }
-
- /**
- * Parses the given schema object and returns an instance of this
- * class which corresponds to its properties.
- *
- * @param {object} schema
- * A JSON schema object which corresponds to a definition of
- * this type.
- * @param {Array<string>} path
- * The path to this schema object from the root schema,
- * corresponding to the property names and array indices
- * traversed during parsing in order to arrive at this schema
- * object.
- * @param {Array<string>} [extraProperties]
- * An array of extra property names which are valid for this
- * schema in the current context.
- * @returns {Type}
- * An instance of this type which corresponds to the given
- * schema object.
- * @static
- */
- static parseSchema(schema, path, extraProperties = []) {
- this.checkSchemaProperties(schema, path, extraProperties);
-
- return new this(schema);
- }
-
- /**
- * Checks that all of the properties present in the given schema
- * object are valid properties for this type, and throws if invalid.
- *
- * @param {object} schema
- * A JSON schema object.
- * @param {Array<string>} path
- * The path to this schema object from the root schema,
- * corresponding to the property names and array indices
- * traversed during parsing in order to arrive at this schema
- * object.
- * @param {Array<string>} [extra]
- * An array of extra property names which are valid for this
- * schema in the current context.
- * @throws {Error}
- * An error describing the first invalid property found in the
- * schema object.
- */
- static checkSchemaProperties(schema, path, extra = []) {
- let allowedSet = new Set([...this.EXTRA_PROPERTIES, ...extra]);
-
- for (let prop of Object.keys(schema)) {
- if (!allowedSet.has(prop)) {
- throw new Error(`Internal error: Namespace ${path.join(".")} has invalid type property "${prop}" in type "${schema.id || JSON.stringify(schema)}"`);
- }
- }
- }
-
- // Takes a value, checks that it has the correct type, and returns a
- // "normalized" version of the value. The normalized version will
- // include "nulls" in place of omitted optional properties. The
- // result of this function is either {error: "Some type error"} or
- // {value: <normalized-value>}.
- normalize(value, context) {
- return context.error("invalid type");
- }
-
- // Unlike normalize, this function does a shallow check to see if
- // |baseType| (one of the possible getValueBaseType results) is
- // valid for this type. It returns true or false. It's used to fill
- // in optional arguments to functions before actually type checking
-
- checkBaseType(baseType) {
- return false;
- }
-
- // Helper method that simply relies on checkBaseType to implement
- // normalize. Subclasses can choose to use it or not.
- normalizeBase(type, value, context) {
- if (this.checkBaseType(getValueBaseType(value))) {
- this.checkDeprecated(context, value);
- return {value: this.preprocess(value, context)};
- }
-
- let choice;
- if (/^[aeiou]/.test(type)) {
- choice = `be an ${type} value`;
- } else {
- choice = `be a ${type} value`;
- }
-
- return context.error(`Expected ${type} instead of ${JSON.stringify(value)}`,
- choice);
- }
-}
-
-// Type that allows any value.
-class AnyType extends Type {
- normalize(value, context) {
- this.checkDeprecated(context, value);
- return this.postprocess({value}, context);
- }
-
- checkBaseType(baseType) {
- return true;
- }
-}
-
-// An untagged union type.
-class ChoiceType extends Type {
- static get EXTRA_PROPERTIES() {
- return ["choices", ...super.EXTRA_PROPERTIES];
- }
-
- static parseSchema(schema, path, extraProperties = []) {
- this.checkSchemaProperties(schema, path, extraProperties);
-
- let choices = schema.choices.map(t => Schemas.parseSchema(t, path));
- return new this(schema, choices);
- }
-
- constructor(schema, choices) {
- super(schema);
- this.choices = choices;
- }
-
- extend(type) {
- this.choices.push(...type.choices);
-
- return this;
- }
-
- normalize(value, context) {
- this.checkDeprecated(context, value);
-
- let error;
- let {choices, result} = context.withChoices(() => {
- for (let choice of this.choices) {
- let r = choice.normalize(value, context);
- if (!r.error) {
- return r;
- }
-
- error = r;
- }
- });
-
- if (result) {
- return result;
- }
- if (choices.length <= 1) {
- return error;
- }
-
- let n = choices.length - 1;
- choices[n] = `or ${choices[n]}`;
-
- let message = `Value must either: ${choices.join(", ")}`;
-
- return context.error(message, null);
- }
-
- checkBaseType(baseType) {
- return this.choices.some(t => t.checkBaseType(baseType));
- }
-}
-
-// This is a reference to another type--essentially a typedef.
-class RefType extends Type {
- static get EXTRA_PROPERTIES() {
- return ["$ref", ...super.EXTRA_PROPERTIES];
- }
-
- static parseSchema(schema, path, extraProperties = []) {
- this.checkSchemaProperties(schema, path, extraProperties);
-
- let ref = schema.$ref;
- let ns = path[0];
- if (ref.includes(".")) {
- [ns, ref] = ref.split(".");
- }
- return new this(schema, ns, ref);
- }
-
- // For a reference to a type named T declared in namespace NS,
- // namespaceName will be NS and reference will be T.
- constructor(schema, namespaceName, reference) {
- super(schema);
- this.namespaceName = namespaceName;
- this.reference = reference;
- }
-
- get targetType() {
- let ns = Schemas.namespaces.get(this.namespaceName);
- let type = ns.get(this.reference);
- if (!type) {
- throw new Error(`Internal error: Type ${this.reference} not found`);
- }
- return type;
- }
-
- normalize(value, context) {
- this.checkDeprecated(context, value);
- return this.targetType.normalize(value, context);
- }
-
- checkBaseType(baseType) {
- return this.targetType.checkBaseType(baseType);
- }
-}
-
-class StringType extends Type {
- static get EXTRA_PROPERTIES() {
- return ["enum", "minLength", "maxLength", "pattern", "format",
- ...super.EXTRA_PROPERTIES];
- }
-
- static parseSchema(schema, path, extraProperties = []) {
- this.checkSchemaProperties(schema, path, extraProperties);
-
- let enumeration = schema.enum || null;
- if (enumeration) {
- // The "enum" property is either a list of strings that are
- // valid values or else a list of {name, description} objects,
- // where the .name values are the valid values.
- enumeration = enumeration.map(e => {
- if (typeof(e) == "object") {
- return e.name;
- }
- return e;
- });
- }
-
- let pattern = null;
- if (schema.pattern) {
- try {
- pattern = parsePattern(schema.pattern);
- } catch (e) {
- throw new Error(`Internal error: Invalid pattern ${JSON.stringify(schema.pattern)}`);
- }
- }
-
- let format = null;
- if (schema.format) {
- if (!(schema.format in FORMATS)) {
- throw new Error(`Internal error: Invalid string format ${schema.format}`);
- }
- format = FORMATS[schema.format];
- }
- return new this(schema, enumeration,
- schema.minLength || 0,
- schema.maxLength || Infinity,
- pattern,
- format);
- }
-
- constructor(schema, enumeration, minLength, maxLength, pattern, format) {
- super(schema);
- this.enumeration = enumeration;
- this.minLength = minLength;
- this.maxLength = maxLength;
- this.pattern = pattern;
- this.format = format;
- }
-
- normalize(value, context) {
- let r = this.normalizeBase("string", value, context);
- if (r.error) {
- return r;
- }
- value = r.value;
-
- if (this.enumeration) {
- if (this.enumeration.includes(value)) {
- return this.postprocess({value}, context);
- }
-
- let choices = this.enumeration.map(JSON.stringify).join(", ");
-
- return context.error(`Invalid enumeration value ${JSON.stringify(value)}`,
- `be one of [${choices}]`);
- }
-
- if (value.length < this.minLength) {
- return context.error(`String ${JSON.stringify(value)} is too short (must be ${this.minLength})`,
- `be longer than ${this.minLength}`);
- }
- if (value.length > this.maxLength) {
- return context.error(`String ${JSON.stringify(value)} is too long (must be ${this.maxLength})`,
- `be shorter than ${this.maxLength}`);
- }
-
- if (this.pattern && !this.pattern.test(value)) {
- return context.error(`String ${JSON.stringify(value)} must match ${this.pattern}`,
- `match the pattern ${this.pattern.toSource()}`);
- }
-
- if (this.format) {
- try {
- r.value = this.format(r.value, context);
- } catch (e) {
- return context.error(String(e), `match the format "${this.format.name}"`);
- }
- }
-
- return r;
- }
-
- checkBaseType(baseType) {
- return baseType == "string";
- }
-
- inject(path, name, dest, context) {
- if (this.enumeration) {
- exportLazyGetter(dest, name, () => {
- let obj = Cu.createObjectIn(dest);
- for (let e of this.enumeration) {
- obj[e.toUpperCase()] = e;
- }
- return obj;
- });
- }
- }
-}
-
-let SubModuleType;
-class ObjectType extends Type {
- static get EXTRA_PROPERTIES() {
- return ["properties", "patternProperties", ...super.EXTRA_PROPERTIES];
- }
-
- static parseSchema(schema, path, extraProperties = []) {
- if ("functions" in schema) {
- return SubModuleType.parseSchema(schema, path, extraProperties);
- }
-
- if (!("$extend" in schema)) {
- // Only allow extending "properties" and "patternProperties".
- extraProperties = ["additionalProperties", "isInstanceOf", ...extraProperties];
- }
- this.checkSchemaProperties(schema, path, extraProperties);
-
- let parseProperty = (schema, extraProps = []) => {
- return {
- type: Schemas.parseSchema(schema, path,
- ["unsupported", "onError", "permissions", ...extraProps]),
- optional: schema.optional || false,
- unsupported: schema.unsupported || false,
- onError: schema.onError || null,
- };
- };
-
- // Parse explicit "properties" object.
- let properties = Object.create(null);
- for (let propName of Object.keys(schema.properties || {})) {
- properties[propName] = parseProperty(schema.properties[propName], ["optional"]);
- }
-
- // Parse regexp properties from "patternProperties" object.
- let patternProperties = [];
- for (let propName of Object.keys(schema.patternProperties || {})) {
- let pattern;
- try {
- pattern = parsePattern(propName);
- } catch (e) {
- throw new Error(`Internal error: Invalid property pattern ${JSON.stringify(propName)}`);
- }
-
- patternProperties.push({
- pattern,
- type: parseProperty(schema.patternProperties[propName]),
- });
- }
-
- // Parse "additionalProperties" schema.
- let additionalProperties = null;
- if (schema.additionalProperties) {
- let type = schema.additionalProperties;
- if (type === true) {
- type = {"type": "any"};
- }
-
- additionalProperties = Schemas.parseSchema(type, path);
- }
-
- return new this(schema, properties, additionalProperties, patternProperties, schema.isInstanceOf || null);
- }
-
- constructor(schema, properties, additionalProperties, patternProperties, isInstanceOf) {
- super(schema);
- this.properties = properties;
- this.additionalProperties = additionalProperties;
- this.patternProperties = patternProperties;
- this.isInstanceOf = isInstanceOf;
- }
-
- extend(type) {
- for (let key of Object.keys(type.properties)) {
- if (key in this.properties) {
- throw new Error(`InternalError: Attempt to extend an object with conflicting property "${key}"`);
- }
- this.properties[key] = type.properties[key];
- }
-
- this.patternProperties.push(...type.patternProperties);
-
- return this;
- }
-
- checkBaseType(baseType) {
- return baseType == "object";
- }
-
- /**
- * Extracts the enumerable properties of the given object, including
- * function properties which would normally be omitted by X-ray
- * wrappers.
- *
- * @param {object} value
- * @param {Context} context
- * The current parse context.
- * @returns {object}
- * An object with an `error` or `value` property.
- */
- extractProperties(value, context) {
- // |value| should be a JS Xray wrapping an object in the
- // extension compartment. This works well except when we need to
- // access callable properties on |value| since JS Xrays don't
- // support those. To work around the problem, we verify that
- // |value| is a plain JS object (i.e., not anything scary like a
- // Proxy). Then we copy the properties out of it into a normal
- // object using a waiver wrapper.
-
- let klass = Cu.getClassName(value, true);
- if (klass != "Object") {
- throw context.error(`Expected a plain JavaScript object, got a ${klass}`,
- `be a plain JavaScript object`);
- }
-
- let properties = Object.create(null);
-
- let waived = Cu.waiveXrays(value);
- for (let prop of Object.getOwnPropertyNames(waived)) {
- let desc = Object.getOwnPropertyDescriptor(waived, prop);
- if (desc.get || desc.set) {
- throw context.error("Objects cannot have getters or setters on properties",
- "contain no getter or setter properties");
- }
- // Chrome ignores non-enumerable properties.
- if (desc.enumerable) {
- properties[prop] = Cu.unwaiveXrays(desc.value);
- }
- }
-
- return properties;
- }
-
- checkProperty(context, prop, propType, result, properties, remainingProps) {
- let {type, optional, unsupported, onError} = propType;
- let error = null;
-
- if (unsupported) {
- if (prop in properties) {
- error = context.error(`Property "${prop}" is unsupported by Firefox`,
- `not contain an unsupported "${prop}" property`);
- }
- } else if (prop in properties) {
- if (optional && (properties[prop] === null || properties[prop] === undefined)) {
- result[prop] = null;
- } else {
- let r = context.withPath(prop, () => type.normalize(properties[prop], context));
- if (r.error) {
- error = r;
- } else {
- result[prop] = r.value;
- properties[prop] = r.value;
- }
- }
- remainingProps.delete(prop);
- } else if (!optional) {
- error = context.error(`Property "${prop}" is required`,
- `contain the required "${prop}" property`);
- } else if (optional !== "omit-key-if-missing") {
- result[prop] = null;
- }
-
- if (error) {
- if (onError == "warn") {
- context.logError(error.error);
- } else if (onError != "ignore") {
- throw error;
- }
-
- result[prop] = null;
- }
- }
-
- normalize(value, context) {
- try {
- let v = this.normalizeBase("object", value, context);
- if (v.error) {
- return v;
- }
- value = v.value;
-
- if (this.isInstanceOf) {
- if (Object.keys(this.properties).length ||
- this.patternProperties.length ||
- !(this.additionalProperties instanceof AnyType)) {
- throw new Error("InternalError: isInstanceOf can only be used with objects that are otherwise unrestricted");
- }
-
- if (!instanceOf(value, this.isInstanceOf)) {
- return context.error(`Object must be an instance of ${this.isInstanceOf}`,
- `be an instance of ${this.isInstanceOf}`);
- }
-
- // This is kind of a hack, but we can't normalize things that
- // aren't JSON, so we just return them.
- return this.postprocess({value}, context);
- }
-
- let properties = this.extractProperties(value, context);
- let remainingProps = new Set(Object.keys(properties));
-
- let result = {};
- for (let prop of Object.keys(this.properties)) {
- this.checkProperty(context, prop, this.properties[prop], result,
- properties, remainingProps);
- }
-
- for (let prop of Object.keys(properties)) {
- for (let {pattern, type} of this.patternProperties) {
- if (pattern.test(prop)) {
- this.checkProperty(context, prop, type, result,
- properties, remainingProps);
- }
- }
- }
-
- if (this.additionalProperties) {
- for (let prop of remainingProps) {
- let type = this.additionalProperties;
- let r = context.withPath(prop, () => type.normalize(properties[prop], context));
- if (r.error) {
- return r;
- }
- result[prop] = r.value;
- }
- } else if (remainingProps.size == 1) {
- return context.error(`Unexpected property "${[...remainingProps]}"`,
- `not contain an unexpected "${[...remainingProps]}" property`);
- } else if (remainingProps.size) {
- let props = [...remainingProps].sort().join(", ");
- return context.error(`Unexpected properties: ${props}`,
- `not contain the unexpected properties [${props}]`);
- }
-
- return this.postprocess({value: result}, context);
- } catch (e) {
- if (e.error) {
- return e;
- }
- throw e;
- }
- }
-}
-
-// This type is just a placeholder to be referred to by
-// SubModuleProperty. No value is ever expected to have this type.
-SubModuleType = class SubModuleType extends Type {
- static get EXTRA_PROPERTIES() {
- return ["functions", "events", "properties", ...super.EXTRA_PROPERTIES];
- }
-
- static parseSchema(schema, path, extraProperties = []) {
- this.checkSchemaProperties(schema, path, extraProperties);
-
- // The path we pass in here is only used for error messages.
- path = [...path, schema.id];
- let functions = schema.functions.map(fun => Schemas.parseFunction(path, fun));
-
- return new this(functions);
- }
-
- constructor(functions) {
- super();
- this.functions = functions;
- }
-};
-
-class NumberType extends Type {
- normalize(value, context) {
- let r = this.normalizeBase("number", value, context);
- if (r.error) {
- return r;
- }
-
- if (isNaN(r.value) || !Number.isFinite(r.value)) {
- return context.error("NaN and infinity are not valid",
- "be a finite number");
- }
-
- return r;
- }
-
- checkBaseType(baseType) {
- return baseType == "number" || baseType == "integer";
- }
-}
-
-class IntegerType extends Type {
- static get EXTRA_PROPERTIES() {
- return ["minimum", "maximum", ...super.EXTRA_PROPERTIES];
- }
-
- static parseSchema(schema, path, extraProperties = []) {
- this.checkSchemaProperties(schema, path, extraProperties);
-
- return new this(schema, schema.minimum || -Infinity, schema.maximum || Infinity);
- }
-
- constructor(schema, minimum, maximum) {
- super(schema);
- this.minimum = minimum;
- this.maximum = maximum;
- }
-
- normalize(value, context) {
- let r = this.normalizeBase("integer", value, context);
- if (r.error) {
- return r;
- }
- value = r.value;
-
- // Ensure it's between -2**31 and 2**31-1
- if (!Number.isSafeInteger(value)) {
- return context.error("Integer is out of range",
- "be a valid 32 bit signed integer");
- }
-
- if (value < this.minimum) {
- return context.error(`Integer ${value} is too small (must be at least ${this.minimum})`,
- `be at least ${this.minimum}`);
- }
- if (value > this.maximum) {
- return context.error(`Integer ${value} is too big (must be at most ${this.maximum})`,
- `be no greater than ${this.maximum}`);
- }
-
- return this.postprocess(r, context);
- }
-
- checkBaseType(baseType) {
- return baseType == "integer";
- }
-}
-
-class BooleanType extends Type {
- normalize(value, context) {
- return this.normalizeBase("boolean", value, context);
- }
-
- checkBaseType(baseType) {
- return baseType == "boolean";
- }
-}
-
-class ArrayType extends Type {
- static get EXTRA_PROPERTIES() {
- return ["items", "minItems", "maxItems", ...super.EXTRA_PROPERTIES];
- }
-
- static parseSchema(schema, path, extraProperties = []) {
- this.checkSchemaProperties(schema, path, extraProperties);
-
- let items = Schemas.parseSchema(schema.items, path);
-
- return new this(schema, items, schema.minItems || 0, schema.maxItems || Infinity);
- }
-
- constructor(schema, itemType, minItems, maxItems) {
- super(schema);
- this.itemType = itemType;
- this.minItems = minItems;
- this.maxItems = maxItems;
- }
-
- normalize(value, context) {
- let v = this.normalizeBase("array", value, context);
- if (v.error) {
- return v;
- }
- value = v.value;
-
- let result = [];
- for (let [i, element] of value.entries()) {
- element = context.withPath(String(i), () => this.itemType.normalize(element, context));
- if (element.error) {
- return element;
- }
- result.push(element.value);
- }
-
- if (result.length < this.minItems) {
- return context.error(`Array requires at least ${this.minItems} items; you have ${result.length}`,
- `have at least ${this.minItems} items`);
- }
-
- if (result.length > this.maxItems) {
- return context.error(`Array requires at most ${this.maxItems} items; you have ${result.length}`,
- `have at most ${this.maxItems} items`);
- }
-
- return this.postprocess({value: result}, context);
- }
-
- checkBaseType(baseType) {
- return baseType == "array";
- }
-}
-
-class FunctionType extends Type {
- static get EXTRA_PROPERTIES() {
- return ["parameters", "async", "returns", ...super.EXTRA_PROPERTIES];
- }
-
- static parseSchema(schema, path, extraProperties = []) {
- this.checkSchemaProperties(schema, path, extraProperties);
-
- let isAsync = !!schema.async;
- let isExpectingCallback = typeof schema.async === "string";
- let parameters = null;
- if ("parameters" in schema) {
- parameters = [];
- for (let param of schema.parameters) {
- // Callbacks default to optional for now, because of promise
- // handling.
- let isCallback = isAsync && param.name == schema.async;
- if (isCallback) {
- isExpectingCallback = false;
- }
-
- parameters.push({
- type: Schemas.parseSchema(param, path, ["name", "optional", "default"]),
- name: param.name,
- optional: param.optional == null ? isCallback : param.optional,
- default: param.default == undefined ? null : param.default,
- });
- }
- }
- if (isExpectingCallback) {
- throw new Error(`Internal error: Expected a callback parameter with name ${schema.async}`);
- }
-
- let hasAsyncCallback = false;
- if (isAsync) {
- hasAsyncCallback = (parameters &&
- parameters.length &&
- parameters[parameters.length - 1].name == schema.async);
-
- if (schema.returns) {
- throw new Error("Internal error: Async functions must not have return values.");
- }
- if (schema.allowAmbiguousOptionalArguments && !hasAsyncCallback) {
- throw new Error("Internal error: Async functions with ambiguous arguments must declare the callback as the last parameter");
- }
- }
-
- return new this(schema, parameters, isAsync, hasAsyncCallback);
- }
-
- constructor(schema, parameters, isAsync, hasAsyncCallback) {
- super(schema);
- this.parameters = parameters;
- this.isAsync = isAsync;
- this.hasAsyncCallback = hasAsyncCallback;
- }
-
- normalize(value, context) {
- return this.normalizeBase("function", value, context);
- }
-
- checkBaseType(baseType) {
- return baseType == "function";
- }
-}
-
-// Represents a "property" defined in a schema namespace with a
-// particular value. Essentially this is a constant.
-class ValueProperty extends Entry {
- constructor(schema, name, value) {
- super(schema);
- this.name = name;
- this.value = value;
- }
-
- inject(path, name, dest, context) {
- dest[name] = this.value;
- }
-}
-
-// Represents a "property" defined in a schema namespace that is not a
-// constant.
-class TypeProperty extends Entry {
- constructor(schema, namespaceName, name, type, writable) {
- super(schema);
- this.namespaceName = namespaceName;
- this.name = name;
- this.type = type;
- this.writable = writable;
- }
-
- throwError(context, msg) {
- throw context.makeError(`${msg} for ${this.namespaceName}.${this.name}.`);
- }
-
- inject(path, name, dest, context) {
- if (this.unsupported) {
- return;
- }
-
- let apiImpl = context.getImplementation(path.join("."), name);
-
- let getStub = () => {
- this.checkDeprecated(context);
- return apiImpl.getProperty();
- };
-
- let desc = {
- configurable: false,
- enumerable: true,
-
- get: Cu.exportFunction(getStub, dest),
- };
-
- if (this.writable) {
- let setStub = (value) => {
- let normalized = this.type.normalize(value, context);
- if (normalized.error) {
- this.throwError(context, normalized.error);
- }
-
- apiImpl.setProperty(normalized.value);
- };
-
- desc.set = Cu.exportFunction(setStub, dest);
- }
-
- Object.defineProperty(dest, name, desc);
- }
-}
-
-class SubModuleProperty extends Entry {
- // A SubModuleProperty represents a tree of objects and properties
- // to expose to an extension. Currently we support only a limited
- // form of sub-module properties, where "$ref" points to a
- // SubModuleType containing a list of functions and "properties" is
- // a list of additional simple properties.
- //
- // name: Name of the property stuff is being added to.
- // namespaceName: Namespace in which the property lives.
- // reference: Name of the type defining the functions to add to the property.
- // properties: Additional properties to add to the module (unsupported).
- constructor(schema, name, namespaceName, reference, properties) {
- super(schema);
- this.name = name;
- this.namespaceName = namespaceName;
- this.reference = reference;
- this.properties = properties;
- }
-
- inject(path, name, dest, context) {
- exportLazyGetter(dest, name, () => {
- let obj = Cu.createObjectIn(dest);
-
- let ns = Schemas.namespaces.get(this.namespaceName);
- let type = ns.get(this.reference);
- if (!type && this.reference.includes(".")) {
- let [namespaceName, ref] = this.reference.split(".");
- ns = Schemas.namespaces.get(namespaceName);
- type = ns.get(ref);
- }
- if (!type || !(type instanceof SubModuleType)) {
- throw new Error(`Internal error: ${this.namespaceName}.${this.reference} is not a sub-module`);
- }
-
- let functions = type.functions;
- for (let fun of functions) {
- let subpath = path.concat(name);
- let namespace = subpath.join(".");
- let allowedContexts = fun.allowedContexts.length ? fun.allowedContexts : ns.defaultContexts;
- if (context.shouldInject(namespace, fun.name, allowedContexts)) {
- fun.inject(subpath, fun.name, obj, context);
- }
- }
-
- // TODO: Inject this.properties.
-
- return obj;
- });
- }
-}
-
-// This class is a base class for FunctionEntrys and Events. It takes
-// care of validating parameter lists (i.e., handling of optional
-// parameters and parameter type checking).
-class CallEntry extends Entry {
- constructor(schema, path, name, parameters, allowAmbiguousOptionalArguments) {
- super(schema);
- this.path = path;
- this.name = name;
- this.parameters = parameters;
- this.allowAmbiguousOptionalArguments = allowAmbiguousOptionalArguments;
- }
-
- throwError(context, msg) {
- throw context.makeError(`${msg} for ${this.path.join(".")}.${this.name}.`);
- }
-
- checkParameters(args, context) {
- let fixedArgs = [];
-
- // First we create a new array, fixedArgs, that is the same as
- // |args| but with default values in place of omitted optional parameters.
- let check = (parameterIndex, argIndex) => {
- if (parameterIndex == this.parameters.length) {
- if (argIndex == args.length) {
- return true;
- }
- return false;
- }
-
- let parameter = this.parameters[parameterIndex];
- if (parameter.optional) {
- // Try skipping it.
- fixedArgs[parameterIndex] = parameter.default;
- if (check(parameterIndex + 1, argIndex)) {
- return true;
- }
- }
-
- if (argIndex == args.length) {
- return false;
- }
-
- let arg = args[argIndex];
- if (!parameter.type.checkBaseType(getValueBaseType(arg))) {
- // For Chrome compatibility, use the default value if null or undefined
- // is explicitly passed but is not a valid argument in this position.
- if (parameter.optional && (arg === null || arg === undefined)) {
- fixedArgs[parameterIndex] = Cu.cloneInto(parameter.default, global);
- } else {
- return false;
- }
- } else {
- fixedArgs[parameterIndex] = arg;
- }
-
- return check(parameterIndex + 1, argIndex + 1);
- };
-
- if (this.allowAmbiguousOptionalArguments) {
- // When this option is set, it's up to the implementation to
- // parse arguments.
- // The last argument for asynchronous methods is either a function or null.
- // This is specifically done for runtime.sendMessage.
- if (this.hasAsyncCallback && typeof(args[args.length - 1]) != "function") {
- args.push(null);
- }
- return args;
- }
- let success = check(0, 0);
- if (!success) {
- this.throwError(context, "Incorrect argument types");
- }
-
- // Now we normalize (and fully type check) all non-omitted arguments.
- fixedArgs = fixedArgs.map((arg, parameterIndex) => {
- if (arg === null) {
- return null;
- }
- let parameter = this.parameters[parameterIndex];
- let r = parameter.type.normalize(arg, context);
- if (r.error) {
- this.throwError(context, `Type error for parameter ${parameter.name} (${r.error})`);
- }
- return r.value;
- });
-
- return fixedArgs;
- }
-}
-
-// Represents a "function" defined in a schema namespace.
-class FunctionEntry extends CallEntry {
- constructor(schema, path, name, type, unsupported, allowAmbiguousOptionalArguments, returns, permissions) {
- super(schema, path, name, type.parameters, allowAmbiguousOptionalArguments);
- this.unsupported = unsupported;
- this.returns = returns;
- this.permissions = permissions;
-
- this.isAsync = type.isAsync;
- this.hasAsyncCallback = type.hasAsyncCallback;
- }
-
- inject(path, name, dest, context) {
- if (this.unsupported) {
- return;
- }
-
- if (this.permissions && !this.permissions.some(perm => context.hasPermission(perm))) {
- return;
- }
-
- exportLazyGetter(dest, name, () => {
- let apiImpl = context.getImplementation(path.join("."), name);
-
- let stub;
- if (this.isAsync) {
- stub = (...args) => {
- this.checkDeprecated(context);
- let actuals = this.checkParameters(args, context);
- let callback = null;
- if (this.hasAsyncCallback) {
- callback = actuals.pop();
- }
- if (callback === null && context.isChromeCompat) {
- // We pass an empty stub function as a default callback for
- // the `chrome` API, so promise objects are not returned,
- // and lastError values are reported immediately.
- callback = () => {};
- }
- return apiImpl.callAsyncFunction(actuals, callback);
- };
- } else if (!this.returns) {
- stub = (...args) => {
- this.checkDeprecated(context);
- let actuals = this.checkParameters(args, context);
- return apiImpl.callFunctionNoReturn(actuals);
- };
- } else {
- stub = (...args) => {
- this.checkDeprecated(context);
- let actuals = this.checkParameters(args, context);
- return apiImpl.callFunction(actuals);
- };
- }
- return Cu.exportFunction(stub, dest);
- });
- }
-}
-
-// Represents an "event" defined in a schema namespace.
-class Event extends CallEntry {
- constructor(schema, path, name, type, extraParameters, unsupported, permissions) {
- super(schema, path, name, extraParameters);
- this.type = type;
- this.unsupported = unsupported;
- this.permissions = permissions;
- }
-
- checkListener(listener, context) {
- let r = this.type.normalize(listener, context);
- if (r.error) {
- this.throwError(context, "Invalid listener");
- }
- return r.value;
- }
-
- inject(path, name, dest, context) {
- if (this.unsupported) {
- return;
- }
-
- if (this.permissions && !this.permissions.some(perm => context.hasPermission(perm))) {
- return;
- }
-
- exportLazyGetter(dest, name, () => {
- let apiImpl = context.getImplementation(path.join("."), name);
-
- let addStub = (listener, ...args) => {
- listener = this.checkListener(listener, context);
- let actuals = this.checkParameters(args, context);
- apiImpl.addListener(listener, actuals);
- };
-
- let removeStub = (listener) => {
- listener = this.checkListener(listener, context);
- apiImpl.removeListener(listener);
- };
-
- let hasStub = (listener) => {
- listener = this.checkListener(listener, context);
- return apiImpl.hasListener(listener);
- };
-
- let obj = Cu.createObjectIn(dest);
-
- Cu.exportFunction(addStub, obj, {defineAs: "addListener"});
- Cu.exportFunction(removeStub, obj, {defineAs: "removeListener"});
- Cu.exportFunction(hasStub, obj, {defineAs: "hasListener"});
-
- return obj;
- });
- }
-}
-
-const TYPES = Object.freeze(Object.assign(Object.create(null), {
- any: AnyType,
- array: ArrayType,
- boolean: BooleanType,
- function: FunctionType,
- integer: IntegerType,
- number: NumberType,
- object: ObjectType,
- string: StringType,
-}));
-
-this.Schemas = {
- initialized: false,
-
- // Maps a schema URL to the JSON contained in that schema file. This
- // is useful for sending the JSON across processes.
- schemaJSON: new Map(),
-
- // Map[<schema-name> -> Map[<symbol-name> -> Entry]]
- // This keeps track of all the schemas that have been loaded so far.
- namespaces: new Map(),
-
- register(namespaceName, symbol, value) {
- let ns = this.namespaces.get(namespaceName);
- if (!ns) {
- ns = new Map();
- ns.name = namespaceName;
- ns.permissions = null;
- ns.allowedContexts = [];
- ns.defaultContexts = [];
- this.namespaces.set(namespaceName, ns);
- }
- ns.set(symbol, value);
- },
-
- parseSchema(schema, path, extraProperties = []) {
- let allowedProperties = new Set(extraProperties);
-
- if ("choices" in schema) {
- return ChoiceType.parseSchema(schema, path, allowedProperties);
- } else if ("$ref" in schema) {
- return RefType.parseSchema(schema, path, allowedProperties);
- }
-
- if (!("type" in schema)) {
- throw new Error(`Unexpected value for type: ${JSON.stringify(schema)}`);
- }
-
- allowedProperties.add("type");
-
- let type = TYPES[schema.type];
- if (!type) {
- throw new Error(`Unexpected type ${schema.type}`);
- }
- return type.parseSchema(schema, path, allowedProperties);
- },
-
- parseFunction(path, fun) {
- let f = new FunctionEntry(fun, path, fun.name,
- this.parseSchema(fun, path,
- ["name", "unsupported", "returns",
- "permissions",
- "allowAmbiguousOptionalArguments"]),
- fun.unsupported || false,
- fun.allowAmbiguousOptionalArguments || false,
- fun.returns || null,
- fun.permissions || null);
- return f;
- },
-
- loadType(namespaceName, type) {
- if ("$extend" in type) {
- this.extendType(namespaceName, type);
- } else {
- this.register(namespaceName, type.id, this.parseSchema(type, [namespaceName], ["id"]));
- }
- },
-
- extendType(namespaceName, type) {
- let ns = Schemas.namespaces.get(namespaceName);
- let targetType = ns && ns.get(type.$extend);
-
- // Only allow extending object and choices types for now.
- if (targetType instanceof ObjectType) {
- type.type = "object";
- } else if (!targetType) {
- throw new Error(`Internal error: Attempt to extend a nonexistant type ${type.$extend}`);
- } else if (!(targetType instanceof ChoiceType)) {
- throw new Error(`Internal error: Attempt to extend a non-extensible type ${type.$extend}`);
- }
-
- let parsed = this.parseSchema(type, [namespaceName], ["$extend"]);
- if (parsed.constructor !== targetType.constructor) {
- throw new Error(`Internal error: Bad attempt to extend ${type.$extend}`);
- }
-
- targetType.extend(parsed);
- },
-
- loadProperty(namespaceName, name, prop) {
- if ("$ref" in prop) {
- if (!prop.unsupported) {
- this.register(namespaceName, name, new SubModuleProperty(prop, name, namespaceName, prop.$ref,
- prop.properties || {}));
- }
- } else if ("value" in prop) {
- this.register(namespaceName, name, new ValueProperty(prop, name, prop.value));
- } else {
- // We ignore the "optional" attribute on properties since we
- // don't inject anything here anyway.
- let type = this.parseSchema(prop, [namespaceName], ["optional", "writable"]);
- this.register(namespaceName, name, new TypeProperty(prop, namespaceName, name, type, prop.writable || false));
- }
- },
-
- loadFunction(namespaceName, fun) {
- let f = this.parseFunction([namespaceName], fun);
- this.register(namespaceName, fun.name, f);
- },
-
- loadEvent(namespaceName, event) {
- let extras = event.extraParameters || [];
- extras = extras.map(param => {
- return {
- type: this.parseSchema(param, [namespaceName], ["name", "optional", "default"]),
- name: param.name,
- optional: param.optional || false,
- default: param.default == undefined ? null : param.default,
- };
- });
-
- // We ignore these properties for now.
- /* eslint-disable no-unused-vars */
- let returns = event.returns;
- let filters = event.filters;
- /* eslint-enable no-unused-vars */
-
- let type = this.parseSchema(event, [namespaceName],
- ["name", "unsupported", "permissions",
- "extraParameters", "returns", "filters"]);
-
- let e = new Event(event, [namespaceName], event.name, type, extras,
- event.unsupported || false,
- event.permissions || null);
- this.register(namespaceName, event.name, e);
- },
-
- init() {
- if (this.initialized) {
- return;
- }
- this.initialized = true;
-
- if (Services.appinfo.processType == Services.appinfo.PROCESS_TYPE_CONTENT) {
- let data = Services.cpmm.initialProcessData;
- let schemas = data["Extension:Schemas"];
- if (schemas) {
- this.schemaJSON = schemas;
- }
- Services.cpmm.addMessageListener("Schema:Add", this);
- }
-
- this.flushSchemas();
- },
-
- receiveMessage(msg) {
- switch (msg.name) {
- case "Schema:Add":
- this.schemaJSON.set(msg.data.url, msg.data.schema);
- this.flushSchemas();
- break;
-
- case "Schema:Delete":
- this.schemaJSON.delete(msg.data.url);
- this.flushSchemas();
- break;
- }
- },
-
- flushSchemas() {
- XPCOMUtils.defineLazyGetter(this, "namespaces",
- () => this.parseSchemas());
- },
-
- parseSchemas() {
- Object.defineProperty(this, "namespaces", {
- enumerable: true,
- configurable: true,
- value: new Map(),
- });
-
- for (let json of this.schemaJSON.values()) {
- try {
- this.loadSchema(json);
- } catch (e) {
- Cu.reportError(e);
- }
- }
-
- return this.namespaces;
- },
-
- loadSchema(json) {
- for (let namespace of json) {
- let name = namespace.namespace;
-
- let types = namespace.types || [];
- for (let type of types) {
- this.loadType(name, type);
- }
-
- let properties = namespace.properties || {};
- for (let propertyName of Object.keys(properties)) {
- this.loadProperty(name, propertyName, properties[propertyName]);
- }
-
- let functions = namespace.functions || [];
- for (let fun of functions) {
- this.loadFunction(name, fun);
- }
-
- let events = namespace.events || [];
- for (let event of events) {
- this.loadEvent(name, event);
- }
-
- let ns = this.namespaces.get(name);
- ns.permissions = namespace.permissions || null;
- ns.allowedContexts = namespace.allowedContexts || [];
- ns.defaultContexts = namespace.defaultContexts || [];
- }
- },
-
- load(url) {
- if (Services.appinfo.processType != Services.appinfo.PROCESS_TYPE_CONTENT) {
- return readJSON(url).then(json => {
- this.schemaJSON.set(url, json);
-
- let data = Services.ppmm.initialProcessData;
- data["Extension:Schemas"] = this.schemaJSON;
-
- Services.ppmm.broadcastAsyncMessage("Schema:Add", {url, schema: json});
-
- this.flushSchemas();
- });
- }
- },
-
- unload(url) {
- this.schemaJSON.delete(url);
-
- let data = Services.ppmm.initialProcessData;
- data["Extension:Schemas"] = this.schemaJSON;
-
- Services.ppmm.broadcastAsyncMessage("Schema:Delete", {url});
-
- this.flushSchemas();
- },
-
- /**
- * Checks whether a given object has the necessary permissions to
- * expose the given namespace.
- *
- * @param {string} namespace
- * The top-level namespace to check permissions for.
- * @param {object} wrapperFuncs
- * Wrapper functions for the given context.
- * @param {function} wrapperFuncs.hasPermission
- * A function which, when given a string argument, returns true
- * if the context has the given permission.
- * @returns {boolean}
- * True if the context has permission for the given namespace.
- */
- checkPermissions(namespace, wrapperFuncs) {
- let ns = this.namespaces.get(namespace);
- if (ns && ns.permissions) {
- return ns.permissions.some(perm => wrapperFuncs.hasPermission(perm));
- }
- return true;
- },
-
- exportLazyGetter,
-
- /**
- * Inject registered extension APIs into `dest`.
- *
- * @param {object} dest The root namespace for the APIs.
- * This object is usually exposed to extensions as "chrome" or "browser".
- * @param {object} wrapperFuncs An implementation of the InjectionContext
- * interface, which runs the actual functionality of the generated API.
- */
- inject(dest, wrapperFuncs) {
- let context = new InjectionContext(wrapperFuncs);
-
- let createNamespace = ns => {
- let obj = Cu.createObjectIn(dest);
-
- for (let [name, entry] of ns) {
- let allowedContexts = entry.allowedContexts;
- if (!allowedContexts.length) {
- allowedContexts = ns.defaultContexts;
- }
-
- if (context.shouldInject(ns.name, name, allowedContexts)) {
- entry.inject([ns.name], name, obj, context);
- }
- }
-
- // Remove the namespace object if it is empty
- if (Object.keys(obj).length) {
- return obj;
- }
- };
-
- let createNestedNamespaces = (parent, namespaces) => {
- for (let [prop, namespace] of namespaces) {
- if (namespace instanceof DeepMap) {
- exportLazyGetter(parent, prop, () => {
- let obj = Cu.createObjectIn(parent);
- createNestedNamespaces(obj, namespace);
- return obj;
- });
- } else {
- exportLazyGetter(parent, prop,
- () => createNamespace(namespace));
- }
- }
- };
-
- let nestedNamespaces = new DeepMap();
- for (let ns of this.namespaces.values()) {
- if (ns.permissions && !ns.permissions.some(perm => context.hasPermission(perm))) {
- continue;
- }
-
- if (!wrapperFuncs.shouldInject(ns.name, null, ns.allowedContexts)) {
- continue;
- }
-
- if (ns.name.includes(".")) {
- let path = ns.name.split(".");
- let leafName = path.pop();
-
- let parent = nestedNamespaces.getPath(...path);
-
- parent.set(leafName, ns);
- } else {
- exportLazyGetter(dest, ns.name,
- () => createNamespace(ns));
- }
- }
-
- createNestedNamespaces(dest, nestedNamespaces);
- },
-
- /**
- * Normalize `obj` according to the loaded schema for `typeName`.
- *
- * @param {object} obj The object to normalize against the schema.
- * @param {string} typeName The name in the format namespace.propertyname
- * @param {object} context An implementation of Context. Any validation errors
- * are reported to the given context.
- * @returns {object} The normalized object.
- */
- normalize(obj, typeName, context) {
- let [namespaceName, prop] = typeName.split(".");
- let ns = this.namespaces.get(namespaceName);
- let type = ns.get(prop);
-
- return type.normalize(obj, new Context(context));
- },
-};
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-18 23:05:39 +0000