Bug 1693577 - Pass on original event to inluce triggerNode in popupshowing event. r=mossop

Differential Revision: https://phabricator.services.mozilla.com/D105649

toolkit/content/editMenuOverlay.js

@@ -128,7 +128,7 @@ window.addEventListener("contextmenu", e => {
   }
 
   goUpdateGlobalEditMenuItems(true);
-  popup.openPopupAtScreen(e.screenX, e.screenY, true);
+  popup.openPopupAtScreen(e.screenX, e.screenY, true, e);
   // Don't show any other context menu at the same time. There can be a
   // context menu from an ancestor too but we only want to show this one.
   e.preventDefault();

toolkit/content/tests/browser/browser.ini

@@ -60,6 +60,7 @@ skip-if = ((debug || asan) && os == "win" && bits == 64)
 skip-if = true # bug 1399845 tracks re-enabling this test.
 [browser_bug594509.js]
 [browser_bug982298.js]
+[browser_bug1693577.js]
 [browser_cancel_starting_autoscrolling_requested_by_background_tab.js]
 [browser_charsetMenu_swapBrowsers.js]
 [browser_click_event_during_autoscrolling.js]

toolkit/content/tests/browser/browser_bug1693577.js

@@ -0,0 +1,45 @@
+/*
+ * This test checks that the popupshowing event for input fields, which do not
+ * have a dedicated contextmenu event, but use the global one (added by
+ * editMenuOverlay.js, see bug 1693577) include a triggerNode.
+ *
+ * The search-input field of the browser-sidebar is one of the rare cases in
+ * mozilla-central, which can be used to test this. There are a few more in
+ * comm-central, which need the triggerNode information.
+ */
+
+add_task(async function test_search_input_popupshowing() {
+  let sidebar = document.getElementById("sidebar");
+
+  let loadPromise = BrowserTestUtils.waitForEvent(sidebar, "load", true);
+  SidebarUI.toggle("viewBookmarksSidebar");
+  await loadPromise;
+
+  let inputField = sidebar.contentDocument.getElementById("search-box")
+    .inputField;
+  let popupShownPromise = new Promise(resolve => {
+    sidebar.contentWindow.addEventListener(
+      "popupshowing",
+      e => {
+        Assert.equal(
+          e.target.triggerNode?.id,
+          "search-box",
+          "Popupshowing event for the search input includes triggernode."
+        );
+        resolve();
+      },
+      { once: true }
+    );
+  });
+
+  EventUtils.synthesizeMouseAtCenter(
+    inputField,
+    {
+      type: "contextmenu",
+      button: 2,
+    },
+    sidebar.contentWindow
+  );
+  await popupShownPromise;
+  SidebarUI.toggle("viewBookmarksSidebar");
+});