1 files changed, 84 insertions, 0 deletions
diff --git a/devtools/server/actors/utils/breakpoint-actor-map.js b/devtools/server/actors/utils/breakpoint-actor-map.js
new file mode 100644
index 0000000000..cce32b2833
--- /dev/null
+++ b/devtools/server/actors/utils/breakpoint-actor-map.js
@@ -0,0 +1,84 @@
+/* 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 {
+  BreakpointActor,
+} = require("resource://devtools/server/actors/breakpoint.js");
+
+/**
+ * A BreakpointActorMap is a map from locations to instances of BreakpointActor.
+ */
+class BreakpointActorMap {
+  constructor(threadActor) {
+    this._threadActor = threadActor;
+    this._actors = {};
+  }
+
+  // Get the key in the _actors table for a given breakpoint location.
+  // See also duplicate code in commands.js :(
+  _locationKey(location) {
+    const { sourceUrl, sourceId, line, column } = location;
+    return `${sourceUrl}:${sourceId}:${line}:${column}`;
+  }
+
+  /**
+   * Return all BreakpointActors in this BreakpointActorMap.
+   */
+  findActors() {
+    return Object.values(this._actors);
+  }
+
+  listKeys() {
+    return Object.keys(this._actors);
+  }
+
+  /**
+   * Return the BreakpointActor at the given location in this
+   * BreakpointActorMap.
+   *
+   * @param BreakpointLocation location
+   *        The location for which the BreakpointActor should be returned.
+   *
+   * @returns BreakpointActor actor
+   *          The BreakpointActor at the given location.
+   */
+  getOrCreateBreakpointActor(location) {
+    const key = this._locationKey(location);
+    if (!this._actors[key]) {
+      this._actors[key] = new BreakpointActor(this._threadActor, location);
+    }
+    return this._actors[key];
+  }
+
+  get(location) {
+    const key = this._locationKey(location);
+    return this._actors[key];
+  }
+
+  /**
+   * Delete the BreakpointActor from the given location in this
+   * BreakpointActorMap.
+   *
+   * @param BreakpointLocation location
+   *        The location from which the BreakpointActor should be deleted.
+   */
+  deleteActor(location) {
+    const key = this._locationKey(location);
+    delete this._actors[key];
+  }
+
+  /**
+   * Unregister all currently active breakpoints.
+   */
+  removeAllBreakpoints() {
+    for (const bpActor of Object.values(this._actors)) {
+      bpActor.removeScripts();
+    }
+    this._actors = {};
+  }
+}
+
+exports.BreakpointActorMap = BreakpointActorMap;