1 files changed, 100 insertions, 0 deletions
diff --git a/devtools/server/actors/frame.js b/devtools/server/actors/frame.js
new file mode 100644
index 000000000..fefcad1b0
--- /dev/null
+++ b/devtools/server/actors/frame.js
@@ -0,0 +1,100 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* 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 { ActorPool } = require("devtools/server/actors/common");
+const { createValueGrip } = require("devtools/server/actors/object");
+const { ActorClassWithSpec } = require("devtools/shared/protocol");
+const { frameSpec } = require("devtools/shared/specs/frame");
+
+/**
+ * An actor for a specified stack frame.
+ */
+let FrameActor = ActorClassWithSpec(frameSpec, {
+  /**
+   * Creates the Frame actor.
+   *
+   * @param frame Debugger.Frame
+   *        The debuggee frame.
+   * @param threadActor ThreadActor
+   *        The parent thread actor for this frame.
+   */
+  initialize: function (frame, threadActor) {
+    this.frame = frame;
+    this.threadActor = threadActor;
+  },
+
+  /**
+   * A pool that contains frame-lifetime objects, like the environment.
+   */
+  _frameLifetimePool: null,
+  get frameLifetimePool() {
+    if (!this._frameLifetimePool) {
+      this._frameLifetimePool = new ActorPool(this.conn);
+      this.conn.addActorPool(this._frameLifetimePool);
+    }
+    return this._frameLifetimePool;
+  },
+
+  /**
+   * Finalization handler that is called when the actor is being evicted from
+   * the pool.
+   */
+  disconnect: function () {
+    this.conn.removeActorPool(this._frameLifetimePool);
+    this._frameLifetimePool = null;
+  },
+
+  /**
+   * Returns a frame form for use in a protocol message.
+   */
+  form: function () {
+    let threadActor = this.threadActor;
+    let form = { actor: this.actorID,
+                 type: this.frame.type };
+    if (this.frame.type === "call") {
+      form.callee = createValueGrip(this.frame.callee, threadActor._pausePool,
+        threadActor.objectGrip);
+    }
+
+    if (this.frame.environment) {
+      let envActor = threadActor.createEnvironmentActor(
+        this.frame.environment,
+        this.frameLifetimePool
+      );
+      form.environment = envActor.form();
+    }
+    form.this = createValueGrip(this.frame.this, threadActor._pausePool,
+      threadActor.objectGrip);
+    form.arguments = this._args();
+    if (this.frame.script) {
+      var generatedLocation = this.threadActor.sources.getFrameLocation(this.frame);
+      form.where = {
+        source: generatedLocation.generatedSourceActor.form(),
+        line: generatedLocation.generatedLine,
+        column: generatedLocation.generatedColumn
+      };
+    }
+
+    if (!this.frame.older) {
+      form.oldest = true;
+    }
+
+    return form;
+  },
+
+  _args: function () {
+    if (!this.frame.arguments) {
+      return [];
+    }
+
+    return this.frame.arguments.map(arg => createValueGrip(arg,
+      this.threadActor._pausePool, this.threadActor.objectGrip));
+  }
+});
+
+exports.FrameActor = FrameActor;