1 files changed, 84 insertions, 0 deletions
diff --git a/devtools/client/framework/source-map.js b/devtools/client/framework/source-map.js
new file mode 100644
index 000000000..7c6805c85
--- /dev/null
+++ b/devtools/client/framework/source-map.js
@@ -0,0 +1,84 @@
+// @flow
+
+const {
+  originalToGeneratedId,
+  generatedToOriginalId,
+  isGeneratedId,
+  isOriginalId
+} = require("./source-map-util");
+
+function workerTask(worker, method) {
+  return function(...args: any) {
+    return new Promise((resolve, reject) => {
+      const id = msgId++;
+      worker.postMessage({ id, method, args });
+
+      const listener = ({ data: result }) => {
+        if (result.id !== id) {
+          return;
+        }
+
+        worker.removeEventListener("message", listener);
+        if (result.error) {
+          reject(result.error);
+        } else {
+          resolve(result.response);
+        }
+      };
+
+      worker.addEventListener("message", listener);
+    });
+  };
+}
+
+let sourceMapWorker;
+function restartWorker() {
+  if (sourceMapWorker) {
+    sourceMapWorker.terminate();
+  }
+  sourceMapWorker = new Worker(
+    "resource://devtools/client/framework/source-map-worker.js"
+  );
+
+  if (Services.prefs.getBoolPref("devtools.debugger.client-source-maps-enabled")) {
+    sourceMapWorker.postMessage({ id: 0, method: "enableSourceMaps" });
+  }
+}
+restartWorker();
+
+function destroyWorker() {
+  if (sourceMapWorker) {
+    sourceMapWorker.terminate();
+    sourceMapWorker = null;
+  }
+}
+
+function shouldSourceMap() {
+  return Services.prefs.getBoolPref("devtools.debugger.client-source-maps-enabled");
+}
+
+const getOriginalURLs = workerTask(sourceMapWorker, "getOriginalURLs");
+const getGeneratedLocation = workerTask(sourceMapWorker,
+                                        "getGeneratedLocation");
+const getOriginalLocation = workerTask(sourceMapWorker,
+                                       "getOriginalLocation");
+const getOriginalSourceText = workerTask(sourceMapWorker,
+                                         "getOriginalSourceText");
+const applySourceMap = workerTask(sourceMapWorker, "applySourceMap");
+const clearSourceMaps = workerTask(sourceMapWorker, "clearSourceMaps");
+
+module.exports = {
+  originalToGeneratedId,
+  generatedToOriginalId,
+  isGeneratedId,
+  isOriginalId,
+
+  getOriginalURLs,
+  getGeneratedLocation,
+  getOriginalLocation,
+  getOriginalSourceText,
+  applySourceMap,
+  clearSourceMaps,
+  destroyWorker,
+  shouldSourceMap
+};