1 files changed, 123 insertions, 0 deletions
diff --git a/browser/actors/BrowserTabChild.sys.mjs b/browser/actors/BrowserTabChild.sys.mjs
new file mode 100644
index 0000000000..2863b9e436
--- /dev/null
+++ b/browser/actors/BrowserTabChild.sys.mjs
@@ -0,0 +1,123 @@
+/* vim: set ts=2 sw=2 sts=2 et 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/. */
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  E10SUtils: "resource://gre/modules/E10SUtils.sys.mjs",
+});
+
+export class BrowserTabChild extends JSWindowActorChild {
+  constructor() {
+    super();
+    this.rpmInitialized = false;
+    this.handledFirstPaint = false;
+  }
+
+  actorCreated() {
+    this.sendAsyncMessage("Browser:WindowCreated", {
+      userContextId: this.browsingContext.originAttributes.userContextId,
+    });
+  }
+
+  handleEvent(event) {
+    switch (event.type) {
+      case "DOMDocElementInserted":
+        // NOTE: DOMDocElementInserted may be called multiple times per
+        // PWindowGlobal due to the initial about:blank document's window global
+        // being re-used.
+        this.initializeRPM();
+        break;
+
+      case "MozAfterPaint":
+        if (this.handledFirstPaint) {
+          return;
+        }
+        this.handledFirstPaint = true;
+        this.sendAsyncMessage("Browser:FirstPaint", {});
+        break;
+    }
+  }
+
+  receiveMessage(message) {
+    let context = this.manager.browsingContext;
+    let docShell = context.docShell;
+
+    switch (message.name) {
+      case "Browser:AppTab":
+        if (docShell) {
+          docShell.isAppTab = message.data.isAppTab;
+        }
+        break;
+
+      case "Browser:HasSiblings":
+        try {
+          let browserChild = docShell
+            .QueryInterface(Ci.nsIInterfaceRequestor)
+            .getInterface(Ci.nsIBrowserChild);
+          let hasSiblings = message.data;
+          browserChild.hasSiblings = hasSiblings;
+        } catch (e) {}
+        break;
+
+      // XXX(nika): Should we try to call this in the parent process instead?
+      case "Browser:Reload":
+        /* First, we'll try to use the session history object to reload so
+         * that framesets are handled properly. If we're in a special
+         * window (such as view-source) that has no session history, fall
+         * back on using the web navigation's reload method.
+         */
+        let webNav = docShell.QueryInterface(Ci.nsIWebNavigation);
+        try {
+          if (webNav.sessionHistory) {
+            webNav = webNav.sessionHistory;
+          }
+        } catch (e) {}
+
+        let reloadFlags = message.data.flags;
+        if (message.data.handlingUserInput) {
+          reloadFlags |= Ci.nsIWebNavigation.LOAD_FLAGS_USER_ACTIVATION;
+        }
+
+        try {
+          lazy.E10SUtils.wrapHandlingUserInput(
+            this.document.defaultView,
+            message.data.handlingUserInput,
+            () => webNav.reload(reloadFlags)
+          );
+        } catch (e) {}
+        break;
+
+      case "ForceEncodingDetection":
+        docShell.forceEncodingDetection();
+        break;
+    }
+  }
+
+  // Creates a new PageListener for this process. This will listen for page loads
+  // and for those that match URLs provided by the parent process will set up
+  // a dedicated message port and notify the parent process.
+  // Note: this is part of the old message-manager based RPM and is only still
+  // used by newtab and talos tests.
+  initializeRPM() {
+    if (this.rpmInitialized) {
+      return;
+    }
+
+    // Strip the hash from the URL, because it's not part of the origin.
+    let url = this.document.documentURI.replace(/[\#?].*$/, "");
+
+    let registeredURLs = Services.cpmm.sharedData.get("RemotePageManager:urls");
+
+    if (registeredURLs && registeredURLs.has(url)) {
+      let { ChildMessagePort } = ChromeUtils.import(
+        "resource://gre/modules/remotepagemanager/RemotePageManagerChild.jsm"
+      );
+      // Set up the child side of the message port
+      new ChildMessagePort(this.contentWindow);
+      this.rpmInitialized = true;
+    }
+  }
+}