tor-browser

commit db9f6ed845665dfb7ccd59be4c5e2d668350ada7
parent fe9016075612070249a70edd5f9bb06570318c33
Author: Nazım Can Altınova <canaltinova@gmail.com>
Date:   Tue, 21 Oct 2025 21:15:37 +0000

Bug 1916785 - Add a GET_JS_SOURCES WebChannel request for frontend to fetch sources r=mstange,profiler-reviewers

As the last step, now we implement the WebChannel request, which will be
used by the frontend.

Differential Revision: https://phabricator.services.mozilla.com/D259272

Diffstat:
M
devtools/client/performance-new/@types/perf.d.ts
 | 
12
++++++++++--
M
devtools/client/performance-new/shared/background.sys.mjs
 | 
28
+++++++++++++++++++++++++++-

2 files changed, 37 insertions(+), 3 deletions(-)
diff --git a/devtools/client/performance-new/@types/perf.d.ts b/devtools/client/performance-new/@types/perf.d.ts
@@ -481,7 +481,8 @@ export type RequestFromFrontend =
   | GetSymbolTableRequest
   | QuerySymbolicationApiRequest
   | GetPageFaviconsRequest
-  | OpenScriptInTabDebuggerRequest;
+  | OpenScriptInTabDebuggerRequest
+  | GetJSSourcesRequest;
 
 type StatusQueryRequest = { type: "STATUS_QUERY" };
 type EnableMenuButtonRequest = { type: "ENABLE_MENU_BUTTON" };
@@ -517,6 +518,10 @@ type OpenScriptInTabDebuggerRequest = {
   line: number;
   column: number;
 };
+type GetJSSourcesRequest = {
+  type: "GET_JS_SOURCES";
+  sourceUuids: Array<string>;
+};
 
 export type MessageToFrontend<R> =
   | OutOfBandErrorMessageToFrontend
@@ -549,7 +554,8 @@ export type ResponseToFrontend =
   | GetSymbolTableResponse
   | QuerySymbolicationApiResponse
   | GetPageFaviconsResponse
-  | OpenScriptInTabDebuggerResponse;
+  | OpenScriptInTabDebuggerResponse
+  | GetJSSourcesResponse;
 
 type StatusQueryResponse = {
   menuButtonIsEnabled: boolean;
@@ -580,6 +586,8 @@ type GetSymbolTableResponse = SymbolTableAsTuple;
 type QuerySymbolicationApiResponse = string;
 type GetPageFaviconsResponse = Array<ProfilerFaviconData | null>;
 type OpenScriptInTabDebuggerResponse = void;
+type GetJSSourceReponseItem = { sourceText: string } | { error: string };
+type GetJSSourcesResponse = Array<GetJSSourceReponseItem>;
 
 /**
  * This represents an event channel that can talk to a content page on the web.
diff --git a/devtools/client/performance-new/shared/background.sys.mjs b/devtools/client/performance-new/shared/background.sys.mjs
@@ -36,7 +36,7 @@ const POPUP_FEATURE_FLAG_PREF = "devtools.performance.popup.feature-flag";
 // capabilities of the WebChannel. The front-end can handle old WebChannel
 // versions and has a full list of versions and capabilities here:
 // https://github.com/firefox-devtools/profiler/blob/main/src/app-logic/web-channel.js
-const CURRENT_WEBCHANNEL_VERSION = 5;
+const CURRENT_WEBCHANNEL_VERSION = 6;
 
 const lazyRequire = {};
 // eslint-disable-next-line mozilla/lazy-getter-object-name
@@ -344,7 +344,33 @@ async function getResponseForMessage(request, browser) {
       const { openScriptInDebugger } = lazy.BrowserModule();
       return openScriptInDebugger(tabId, scriptUrl, line, column);
     }
+    case "GET_JS_SOURCES": {
+      const { sourceUuids } = request;
+      if (!Array.isArray(sourceUuids)) {
+        throw new Error("sourceUuids must be an array");
+      }
+
+      const infoForBrowser = infoForBrowserMap.get(browser);
+      if (infoForBrowser === undefined) {
+        throw new Error("No JS source data found for this tab");
+      }
 
+      const jsSources = infoForBrowser.jsSources;
+      if (jsSources === null) {
+        return sourceUuids.map(() => ({
+          error: "Source not found in the browser",
+        }));
+      }
+
+      return sourceUuids.map(uuid => {
+        const sourceText = jsSources[uuid];
+        if (!sourceText) {
+          return { error: "Source not found in the browser" };
+        }
+
+        return { sourceText };
+      });
+    }
     default: {
       console.error(
         "An unknown message type was received by the profiler's WebChannel handler.",