Initial IndexedDB Support (#33044)

Adds indexeddb support to servo. At the moment heed is being used as the
backend, although this can be swapped out by implementing `KvsEngine`.
This PR adds a thread + a thread pool for Indexeddb related operations.
Also `database_access_task_source` is added for Indexeddb related
operations.

This is a partial rewrite of #25214. (Reopened due to branching issue)

Fixes #6963

---------

Signed-off-by: Ashwin Naren <arihant2math@gmail.com>
Signed-off-by: Josh Matthews <josh@joshmatthews.net>
Co-authored-by: Rasmus Viitanen <rasviitanen@gmail.com>
Co-authored-by: Josh Matthews <josh@joshmatthews.net>

components/script_bindings/webidls/IDBDatabase.webidl

@@ -0,0 +1,44 @@
+/* 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 https://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://w3c.github.io/IndexedDB/#idbdatabase
+ *
+ */
+
+// https://w3c.github.io/IndexedDB/#idbdatabase
+[Pref="dom_indexeddb_enabled", Exposed=(Window,Worker)]
+interface IDBDatabase : EventTarget {
+  readonly attribute DOMString name;
+  readonly attribute unsigned long long version;
+  readonly attribute DOMStringList objectStoreNames;
+
+  [Throws, NewObject] IDBTransaction transaction((DOMString or sequence<DOMString>) storeNames,
+                                         optional IDBTransactionMode mode = "readonly",
+                                         optional IDBTransactionOptions options = {});
+  undefined close();
+
+  [Throws, NewObject] IDBObjectStore createObjectStore(
+    DOMString name,
+    optional IDBObjectStoreParameters options = {}
+  );
+  [Throws] undefined deleteObjectStore(DOMString name);
+
+  // Event handlers:
+  attribute EventHandler onabort;
+  attribute EventHandler onclose;
+  attribute EventHandler onerror;
+  attribute EventHandler onversionchange;
+};
+
+enum IDBTransactionDurability { "default", "strict", "relaxed" };
+
+dictionary IDBTransactionOptions {
+  IDBTransactionDurability durability = "default";
+};
+
+dictionary IDBObjectStoreParameters {
+  (DOMString or sequence<DOMString>)? keyPath = null;
+  boolean autoIncrement = false;
+};

components/script_bindings/webidls/IDBFactory.webidl

@@ -0,0 +1,31 @@
+/* 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 https://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://w3c.github.io/IndexedDB/#idbfactory
+ *
+ */
+
+// https://w3c.github.io/IndexedDB/#idbfactory
+partial interface mixin WindowOrWorkerGlobalScope {
+  [Pref="dom_indexeddb_enabled", SameObject] readonly attribute IDBFactory indexedDB;
+};
+
+// https://w3c.github.io/IndexedDB/#idbfactory
+[Pref="dom_indexeddb_enabled", Exposed=(Window,Worker)]
+interface IDBFactory {
+  [NewObject, Throws] IDBOpenDBRequest open(DOMString name,
+                                    optional [EnforceRange] unsigned long long version);
+  [NewObject, Throws] IDBOpenDBRequest deleteDatabase(DOMString name);
+
+  // Promise<sequence<IDBDatabaseInfo>> databases();
+
+  // short cmp(any first, any second);
+};
+
+// https://w3c.github.io/IndexedDB/#dictdef-idbdatabaseinfo
+dictionary IDBDatabaseInfo {
+  DOMString name;
+  unsigned long long version;
+};

components/script_bindings/webidls/IDBObjectStore.webidl

@@ -0,0 +1,48 @@
+/* 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 https://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://w3c.github.io/IndexedDB/#idbobjectstore
+ *
+ */
+
+// https://w3c.github.io/IndexedDB/#idbobjectstore
+[Pref="dom_indexeddb_enabled", Exposed=(Window,Worker)]
+interface IDBObjectStore {
+  attribute DOMString name;
+  // readonly attribute any keyPath;
+  // readonly attribute DOMStringList indexNames;
+  // [SameObject] readonly attribute IDBTransaction transaction;
+  readonly attribute boolean autoIncrement;
+
+  [NewObject, Throws] IDBRequest put(any value, optional any key);
+  [NewObject, Throws] IDBRequest add(any value, optional any key);
+  [NewObject, Throws] IDBRequest delete(any query);
+  [NewObject, Throws] IDBRequest clear();
+  [NewObject, Throws] IDBRequest get(any query);
+  // [NewObject] IDBRequest getKey(any query);
+  // [NewObject] IDBRequest getAll(optional any query,
+                                // optional [EnforceRange] unsigned long count);
+  // [NewObject] IDBRequest getAllKeys(optional any query,
+                                    // optional [EnforceRange] unsigned long count);
+  [NewObject, Throws] IDBRequest count(optional any query);
+
+  // [NewObject] IDBRequest openCursor(optional any query,
+  //                                   optional IDBCursorDirection direction = "next");
+  // [NewObject] IDBRequest openKeyCursor(optional any query,
+  //                                      optional IDBCursorDirection direction = "next");
+
+  // IDBIndex index(DOMString name);
+
+  // [NewObject] IDBIndex createIndex(DOMString name,
+  //                                  (DOMString or sequence<DOMString>) keyPath,
+  //                                  optional IDBIndexParameters options = {});
+  // void deleteIndex(DOMString name);
+};
+
+// https://w3c.github.io/IndexedDB/#dictdef-idbindexparameters
+dictionary IDBIndexParameters {
+  boolean unique = false;
+  boolean multiEntry = false;
+};

components/script_bindings/webidls/IDBOpenDBRequest.webidl

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+/* 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 https://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://w3c.github.io/IndexedDB/#idbopendbrequest
+ *
+ */
+
+// https://w3c.github.io/IndexedDB/#idbopendbrequest
+[Pref="dom_indexeddb_enabled", Exposed=(Window,Worker)]
+interface IDBOpenDBRequest : IDBRequest {
+  // Event handlers:
+  attribute EventHandler onblocked;
+  attribute EventHandler onupgradeneeded;
+};

components/script_bindings/webidls/IDBRequest.webidl

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+/* 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 https://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://w3c.github.io/IndexedDB/#idbrequest
+ *
+ */
+
+// https://w3c.github.io/IndexedDB/#idbrequest
+[Pref="dom_indexeddb_enabled", Exposed=(Window,Worker)]
+interface IDBRequest : EventTarget {
+  readonly attribute any result;
+  readonly attribute DOMException? error;
+  // readonly attribute (IDBObjectStore or IDBIndex or IDBCursor)? source;
+  readonly attribute IDBObjectStore? source;
+  readonly attribute IDBTransaction? transaction;
+  readonly attribute IDBRequestReadyState readyState;
+
+  // Event handlers:
+  attribute EventHandler onsuccess;
+  attribute EventHandler onerror;
+};
+
+// https://w3c.github.io/IndexedDB/#enumdef-idbrequestreadystate
+enum IDBRequestReadyState {
+  "pending",
+  "done"
+};

components/script_bindings/webidls/IDBTransaction.webidl

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+/* 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 https://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://w3c.github.io/IndexedDB/#idbtransaction
+ *
+ */
+
+// https://w3c.github.io/IndexedDB/#idbtransaction
+[Pref="dom_indexeddb_enabled", Exposed=(Window,Worker)]
+interface IDBTransaction : EventTarget {
+  readonly attribute DOMStringList objectStoreNames;
+  readonly attribute IDBTransactionMode mode;
+  // readonly attribute IDBTransactionDurability durability;
+  [SameObject] readonly attribute IDBDatabase db;
+  readonly attribute DOMException? error;
+
+  [Throws] IDBObjectStore objectStore(DOMString name);
+  [Throws] undefined commit();
+  [Throws] undefined abort();
+
+  // Event handlers:
+  attribute EventHandler onabort;
+  attribute EventHandler oncomplete;
+  attribute EventHandler onerror;
+};
+
+enum IDBTransactionMode {
+  "readonly",
+  "readwrite",
+  "versionchange"
+};

components/script_bindings/webidls/IDBVersionChangeEvent.webidl

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+/* 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 https://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://w3c.github.io/IndexedDB/#idbversionchangeevent
+ *
+ */
+
+// FIXME:(arihant2math) Expose to Worker too
+
+// https://w3c.github.io/IndexedDB/#idbversionchangeevent
+[Pref="dom_indexeddb_enabled", Exposed=(Window)]
+interface IDBVersionChangeEvent : Event {
+  constructor(DOMString type, optional IDBVersionChangeEventInit eventInitDict = {});
+
+  readonly attribute unsigned long long oldVersion;
+  readonly attribute unsigned long long? newVersion;
+};
+
+// https://w3c.github.io/IndexedDB/#idbversionchangeevent
+dictionary IDBVersionChangeEventInit : EventInit {
+  unsigned long long oldVersion = 0;
+  unsigned long long? newVersion = null;
+};