From cacfccadf3784f05123402f5b7e739c85ac26f35 Mon Sep 17 00:00:00 2001
From: Zirro <code@zirro.se>
Date: Sun, 20 Aug 2017 22:16:00 +0200
Subject: [PATCH] Add support for [LegacyArrayClass]

---
 lib/constructs/interface.js     |   4 ++
 test/__snapshots__/test.js.snap | 119 ++++++++++++++++++++++++++++++++
 test/cases/LegacyArrayClass.idl |   4 ++
 3 files changed, 127 insertions(+)
 create mode 100644 test/cases/LegacyArrayClass.idl

diff --git a/lib/constructs/interface.js b/lib/constructs/interface.js
index 67f61626..b911b17f 100644
--- a/lib/constructs/interface.js
+++ b/lib/constructs/interface.js
@@ -311,6 +311,10 @@ class Interface {
         Object.setPrototypeOf(${this.name}.prototype, ${this.idl.inheritance}.interface.prototype);
         Object.setPrototypeOf(${this.name}, ${this.idl.inheritance}.interface);
       `;
+    } else if (utils.getExtAttr(this.idl.extAttrs, "LegacyArrayClass")) {
+      this.str += `
+        Object.setPrototypeOf(${this.name}.prototype, Array.prototype);
+      `;
     }
 
     this.str += `
diff --git a/test/__snapshots__/test.js.snap b/test/__snapshots__/test.js.snap
index 8c992727..de29d76a 100644
--- a/test/__snapshots__/test.js.snap
+++ b/test/__snapshots__/test.js.snap
@@ -236,6 +236,125 @@ const Impl = require(\\"../implementations/Factory.js\\");
 "
 `;
 
+exports[`LegacyArrayClass.idl 1`] = `
+"\\"use strict\\";
+
+const conversions = require(\\"webidl-conversions\\");
+const utils = require(\\"./utils.js\\");
+
+const impl = utils.implSymbol;
+
+function LegacyArrayClass() {
+  throw new TypeError(\\"Illegal constructor\\");
+}
+
+Object.setPrototypeOf(LegacyArrayClass.prototype, Array.prototype);
+
+Object.defineProperty(LegacyArrayClass, \\"prototype\\", {
+  value: LegacyArrayClass.prototype,
+  writable: false,
+  enumerable: false,
+  configurable: false
+});
+
+Object.defineProperty(LegacyArrayClass.prototype, \\"length\\", {
+  get() {
+    if (!this || !module.exports.is(this)) {
+      throw new TypeError(\\"Illegal invocation\\");
+    }
+
+    return this[impl][\\"length\\"];
+  },
+
+  enumerable: true,
+  configurable: true
+});
+
+Object.defineProperty(LegacyArrayClass.prototype, Symbol.toStringTag, {
+  value: \\"LegacyArrayClass\\",
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+
+const iface = {
+  mixedInto: [],
+  is(obj) {
+    if (obj) {
+      if (obj[impl] instanceof Impl.implementation) {
+        return true;
+      }
+      for (let i = 0; i < module.exports.mixedInto.length; ++i) {
+        if (obj instanceof module.exports.mixedInto[i]) {
+          return true;
+        }
+      }
+    }
+    return false;
+  },
+  isImpl(obj) {
+    if (obj) {
+      if (obj instanceof Impl.implementation) {
+        return true;
+      }
+
+      const wrapper = utils.wrapperForImpl(obj);
+      for (let i = 0; i < module.exports.mixedInto.length; ++i) {
+        if (wrapper instanceof module.exports.mixedInto[i]) {
+          return true;
+        }
+      }
+    }
+    return false;
+  },
+  convert(obj, { context = \\"The provided value\\" } = {}) {
+    if (module.exports.is(obj)) {
+      return utils.implForWrapper(obj);
+    }
+    throw new TypeError(\`\${context} is not of type 'LegacyArrayClass'.\`);
+  },
+
+  create(constructorArgs, privateData) {
+    let obj = Object.create(LegacyArrayClass.prototype);
+    obj = this.setup(obj, constructorArgs, privateData);
+    return obj;
+  },
+  createImpl(constructorArgs, privateData) {
+    let obj = Object.create(LegacyArrayClass.prototype);
+    obj = this.setup(obj, constructorArgs, privateData);
+    return utils.implForWrapper(obj);
+  },
+  _internalSetup(obj) {},
+  setup(obj, constructorArgs, privateData) {
+    if (!privateData) privateData = {};
+
+    privateData.wrapper = obj;
+
+    this._internalSetup(obj);
+    Object.defineProperty(obj, impl, {
+      value: new Impl.implementation(constructorArgs, privateData),
+      writable: false,
+      enumerable: false,
+      configurable: true
+    });
+
+    obj[impl][utils.wrapperSymbol] = obj;
+    if (Impl.init) {
+      Impl.init(obj[impl], privateData);
+    }
+    return obj;
+  },
+  interface: LegacyArrayClass,
+  expose: {
+    Window: { LegacyArrayClass }
+  }
+}; // iface
+module.exports = iface;
+
+const Impl = require(\\"../implementations/LegacyArrayClass.js\\");
+"
+`;
+
 exports[`PromiseTypes.idl 1`] = `
 "\\"use strict\\";
 
diff --git a/test/cases/LegacyArrayClass.idl b/test/cases/LegacyArrayClass.idl
new file mode 100644
index 00000000..42189ad9
--- /dev/null
+++ b/test/cases/LegacyArrayClass.idl
@@ -0,0 +1,4 @@
+[LegacyArrayClass]
+interface LegacyArrayClass {
+  readonly attribute unsigned long length;
+};