Bug 1783049 - about:welcome should open FxView in its pinned tab, r=Mardak

Differential Revision: https://phabricator.services.mozilla.com/D154478

browser/components/newtab/aboutwelcome/lib/AboutWelcomeDefaults.jsm

@@ -531,8 +531,7 @@ const MR_ABOUT_WELCOME_DEFAULT = {
         primary_button: {
           label: "See what’s new",
           action: {
-            type: "OPEN_ABOUT_PAGE",
+            type: "OPEN_FIREFOX_VIEW",
-            data: { args: "firefoxview", where: "current" },
             navigate: true,
           },
         },

browser/components/newtab/lib/OnboardingMessageProvider.jsm

@@ -332,8 +332,7 @@ const ONBOARDING_MESSAGES = () => [
             primary_button: {
               label: "See what’s new",
               action: {
-                type: "OPEN_ABOUT_PAGE",
+                type: "OPEN_FIREFOX_VIEW",
-                data: { args: "firefoxview", where: "current" },
                 navigate: true,
               },
             },

toolkit/components/messaging-system/lib/SpecialMessageActions.jsm

@@ -258,6 +258,9 @@ const SpecialMessageActions = {
           action.data.where || "tab"
         );
         break;
+      case "OPEN_FIREFOX_VIEW":
+        window.FirefoxViewHandler.openTab();
+        break;
       case "OPEN_PREFERENCES_PAGE":
         window.openPreferences(
           action.data.category || action.data.args,

toolkit/components/messaging-system/schemas/SpecialMessageActionSchemas/SpecialMessageActionSchemas.json

@@ -97,6 +97,18 @@
           "additionalProperties": false,
           "description": "Opens an about: page in Firefox"
         },
+        {
+          "type": "object",
+          "properties": {
+            "type": {
+              "type": "string",
+              "enum": ["OPEN_FIREFOX_VIEW"]
+            }
+          },
+          "required": ["type"],
+          "additionalProperties": false,
+          "description": "Opens the Firefox View pseudo-pinned-tab"
+        },
         {
           "type": "object",
           "properties": {

toolkit/components/messaging-system/schemas/SpecialMessageActionSchemas/index.md

@@ -21,6 +21,12 @@ For snippets, you should add the action type in `button_action` and any addition
 
 Opens the applications menu.
 
+### `OPEN_FIREFOX_VIEW`
+
+* args: (none)
+
+Opens the Firefox View pseudo-tab.
+
 ### `OPEN_PRIVATE_BROWSER_WINDOW`
 
 * args: (none)

toolkit/components/messaging-system/schemas/SpecialMessageActionSchemas/test/browser/browser.ini

@@ -8,6 +8,7 @@ support-files =
 [browser_sma_block_message.js]
 [browser_sma_open_about_page.js]
 [browser_sma_open_awesome_bar.js]
+[browser_sma_open_firefox_view.js]
 [browser_sma_open_private_browser_window.js]
 [browser_sma_open_protection_panel.js]
 [browser_sma_open_protection_report.js]

toolkit/components/messaging-system/schemas/SpecialMessageActionSchemas/test/browser/browser_sma_open_firefox_view.js

@@ -0,0 +1,75 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * The setup code and the utility funcitons here are cribbed from (mostly)
+ * browser/components/firefoxview/test/browser/head.js
+ *
+ * https://bugzilla.mozilla.org/show_bug.cgi?id=1784979 has been filed to move
+ * these to some place publically accessible, after which we will be able to
+ * a bunch of code from this file.
+ */
+add_setup(async () => {
+  await SpecialPowers.pushPrefEnv({
+    set: [["browser.tabs.firefox-view", true]],
+  });
+
+  CustomizableUI.addWidgetToArea(
+    "firefox-view-button",
+    CustomizableUI.AREA_TABSTRIP,
+    0
+  );
+
+  registerCleanupFunction(async () => {
+    // If you're running mochitest with --keep-open=true, and need to
+    // easily tell whether the button really appeared, comment out the below
+    // line so that the button hangs around after the test finishes.
+    CustomizableUI.removeWidgetFromArea("firefox-view-button");
+    await SpecialPowers.popPrefEnv();
+  });
+});
+
+function assertFirefoxViewTab(w = window) {
+  ok(w.FirefoxViewHandler.tab, "Firefox View tab exists");
+  ok(w.FirefoxViewHandler.tab?.hidden, "Firefox View tab is hidden");
+  is(
+    w.gBrowser.tabs.indexOf(w.FirefoxViewHandler.tab),
+    0,
+    "Firefox View tab is the first tab"
+  );
+  is(
+    w.gBrowser.visibleTabs.indexOf(w.FirefoxViewHandler.tab),
+    -1,
+    "Firefox View tab is not in the list of visible tabs"
+  );
+}
+
+function closeFirefoxViewTab(w = window) {
+  w.gBrowser.removeTab(w.FirefoxViewHandler.tab);
+  ok(
+    !w.FirefoxViewHandler.tab,
+    "Reference to Firefox View tab got removed when closing the tab"
+  );
+}
+
+add_task(async function test_open_firefox_view() {
+  // setup
+  let newTabOpened = BrowserTestUtils.waitForEvent(
+    gBrowser.tabContainer,
+    "TabOpen"
+  );
+
+  // execute
+  await SMATestUtils.executeAndValidateAction({
+    type: "OPEN_FIREFOX_VIEW",
+  });
+
+  // verify
+  await newTabOpened;
+  assertFirefoxViewTab();
+
+  // cleanup
+  closeFirefoxViewTab();
+});