Bug 582459 - Reset the focused element when a frame loses document focus; r=mikedeboer,NeilDeakin,hsivonen,jaws

Resetting focus would also clear selection on editable element, so get
current selected text before moving focus to findbar to make
prefill-with-selection work if the content is loaded in chrome process.

Differential Revision: https://phabricator.services.mozilla.com/D89557

browser/components/aboutlogins/tests/chrome/test_confirm_delete_dialog.html

@@ -109,15 +109,15 @@ add_task(async function test_dialog_focus_trap() {
   ok(displayElChildSpan.tabIndex === -1, "The tabIndex value for elements with a hardcoded tabIndex attribute should be reset to '-1'.")
   ok(displayElChildSpan.dataset.oldTabIndex === "0", "Existing tabIndex values should be stored in `dataset.oldTabIndex`.")
 
-  const isActiveElemDialogOrHTML = (elemTagName) => {
-    return (["HTML", "CONFIRMATION-DIALOG"].includes(elemTagName));
+  const isActiveElemDialogOrHTMLorBODY = (elemTagName) => {
+    return (["HTML", "BODY", "CONFIRMATION-DIALOG"].includes(elemTagName));
   }
 
   let iterator = 0;
   while(iterator < 20) {
     sendKey("TAB");
     isnot(document.activeElement.id, "display-child", "The display-child element should not gain focus when the dialog is showing");
-    is(isActiveElemDialogOrHTML(document.activeElement.tagName), true, "The confirmation-dialog should always have focus when the dialog is showing");
+    ok(isActiveElemDialogOrHTMLorBODY(document.activeElement.tagName), "The confirmation-dialog should always have focus when the dialog is showing");
     iterator++;
   }
 });

dom/base/nsFocusManager.cpp

@@ -1626,13 +1626,6 @@ void nsFocusManager::SetFocusInner(Element* aNewContent, int32_t aFlags,
     }
     // return if blurring fails or the focus changes during the blur
     if (focusedBrowsingContext) {
-      // if the focus is being moved to another element in the same document,
-      // or to a descendant, pass the existing window to Blur so that the
-      // current node in the existing window is cleared. If moving to a
-      // window elsewhere, we want to maintain the current node in the
-      // window but still blur it.
-      bool currentIsSameOrAncestor =
-          IsSameOrAncestor(focusedBrowsingContext, newWindow);
       // find the common ancestor of the currently focused window and the new
       // window. The ancestor will need to have its currently focused node
       // cleared once the document has been blurred. Otherwise, we'll be in a
@@ -1650,8 +1643,14 @@ void nsFocusManager::SetFocusInner(Element* aNewContent, int32_t aFlags,
         commonAncestor = GetCommonAncestor(newWindow, focusedBrowsingContext);
       }
 
+      // XXX for the case that we try to focus an already-focused-remote-frame,
+      // we would still send blur and focus IPC to it, but they will not
+      // generate blur or focus event, we don't want to reset activeElement on
+      // the remote frame.
       if (!Blur(
-              currentIsSameOrAncestor ? focusedBrowsingContext.get() : nullptr,
+              (focusMovesToDifferentBC || focusedBrowsingContext->IsInProcess())
+                  ? focusedBrowsingContext.get()
+                  : nullptr,
               commonAncestor ? commonAncestor.get() : nullptr,
               focusMovesToDifferentBC, aAdjustWidget, aActionId,
               elementToFocus)) {
@@ -3545,11 +3544,12 @@ nsresult nsFocusManager::DetermineElementToMoveFocus(
         docShell->TabToTreeOwner(forward, forDocumentNavigation, &tookFocus);
         // If the tree owner took the focus, blur the current element.
         if (tookFocus) {
-          nsCOMPtr<nsPIDOMWindowOuter> window = docShell->GetWindow();
-          if (window->GetFocusedElement() == mFocusedElement) {
+          if (GetFocusedBrowsingContext() &&
+              GetFocusedBrowsingContext()->IsInProcess()) {
             Blur(GetFocusedBrowsingContext(), nullptr, true, true,
                  GenerateFocusActionId());
           } else {
+            nsCOMPtr<nsPIDOMWindowOuter> window = docShell->GetWindow();
             window->SetFocusedElement(nullptr);
           }
           return NS_OK;

dom/events/test/mochitest.ini

@@ -59,7 +59,6 @@ skip-if = verify
 [test_bug448602.html]
 [test_bug450876.html]
 skip-if = verify
-fail-if = (xorigin && fission)
 [test_bug456273.html]
 [test_bug457672.html]
 skip-if = toolkit == 'android' #CRASH_DUMP, RANDOM

dom/events/test/test_bug450876.html

@@ -31,7 +31,7 @@ function doTest() {
   is(document.activeElement, document.getElementById('a'), "link should have focus");
   is(document.hasFocus(), true, "document should be focused");
   synthesizeKey("KEY_Tab");
-  is(document.activeElement, document.getElementById('a'), "body element should be focused");
+  is(document.activeElement, document.body, "body element should be focused");
   is(document.hasFocus(), false, "document should not be focused");
 
   SimpleTest.finish();

layout/reftests/selection/reftest.list

@@ -53,5 +53,5 @@ needs-focus == semitransparent-decoration-line.html semitransparent-decoration-l
 fuzzy-if(OSX,0-1,0-6) fuzzy-if(Android,0-188,0-39) needs-focus == writing-mode.html writing-mode-ref.html
 needs-focus == 1478604.html 1478604-ref.html
 
-needs-focus != disabled-1.html disabled-1-notref.html
+needs-focus == disabled-1.html disabled-1-notref.html
 needs-focus != disabled-2.html disabled-2-notref.html

testing/web-platform/tests/focus/iframe-activeelement-after-focusing-out-iframes.html

@@ -0,0 +1,50 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>iframe activeElement after focusing out iframe</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script>
+function waitForEvent(target, event, checkFn) {
+  return new Promise(resolve => {
+    target.addEventListener(event, e => {
+      if (checkFn && !checkFn(e)) {
+        return;
+      }
+      resolve();
+    }, { once: true });
+  });
+}
+
+function focusTopLevel(w) {
+  w.postMessage("focus", "*");
+}
+
+async function getLog(w) {
+  let log = "";
+  step_timeout(function() {
+    w.postMessage("getlog", "*");
+  }, 0);
+  await waitForEvent(window, "message", (e) => {
+    log = e.data;
+    return true;
+  });
+  return log;
+}
+
+async function runTest(t, url) {
+  let w = window.open(url);
+  t.add_cleanup(() => { w.close(); });
+  await waitForEvent(window, "message", e => e.data === "ready");
+  focusTopLevel(w);
+  assert_equals(await getLog(w), 'outerlog:willfocusinput,windowfocus,didfocusinput,innerlog:willfocusinput,windowfocus,didfocusinput,activeElement:INPUT,windowblur,activeElement:BODY,');
+}
+
+promise_test(async t => {
+  await runTest(t, "support/iframe-activeelement-after-focusing-out-different-site-iframes-outer.sub.html");
+}, "Check iframe activeElement after focusing out different site iframe");
+
+promise_test(async t => {
+  await runTest(t, "support/iframe-activeelement-after-focusing-out-same-site-iframes-outer.html");
+}, "Check iframe activeElement after focusing out same site iframe");
+
+</script>

testing/web-platform/tests/focus/support/iframe-activeelement-after-focusing-out-different-site-iframes-outer.sub.html

@@ -0,0 +1,34 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>iframe active element after focusing out different site iframes outer</title>
+<input></input></br>
+<iframe src="http://{{hosts[alt][www]}}:{{ports[http][0]}}/focus/support/iframe-activeelement-after-focusing-out-iframes-inner.html"></iframe>
+<script>
+let outerlog = "outerlog:";
+
+let input = document.querySelector("input");
+let iframe = document.querySelector("iframe");
+window.onmessage = function(e) {
+  if (e.data == "ready") {
+    opener.postMessage("ready", "*");
+  } else if (e.data == "focus") {
+    outerlog += "willfocusinput,";
+    input.focus();
+    outerlog += "didfocusinput,";
+  } else if (e.data == "getlog") {
+    iframe.contentWindow.postMessage("getlog", "*");
+  } else {
+    opener.postMessage(outerlog + e.data, "*");
+  }
+};
+
+window.onload = function() {
+  window.onfocus = function() {
+    outerlog += "windowfocus,";
+  };
+
+  window.onblur = function() {
+    outerlog += "windowblur,";
+  };
+};
+</script>

testing/web-platform/tests/focus/support/iframe-activeelement-after-focusing-out-iframes-inner.html

@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>iframe active element inner document</title>
+</head>
+<body>
+<h1>Inner</h1><br>
+<input></input>
+<script>
+let innerlog = "innerlog:";
+
+window.onmessage = function(e) {
+  if (e.data == "getlog") {
+    parent.postMessage(innerlog, "*");
+  }
+};
+
+window.onfocus = function() {
+  innerlog += "windowfocus,";
+};
+
+window.onblur = function() {
+  innerlog += "windowblur,";
+  innerlog += "activeElement:" + document.activeElement.tagName + ",";
+};
+
+let input = document.querySelector("input");
+window.onload = function() {
+  innerlog += "willfocusinput,";
+  input.focus();
+  innerlog += "didfocusinput,";
+  innerlog += "activeElement:" + document.activeElement.tagName + ",";
+  parent.postMessage("ready", "*");
+};
+</script>
+</body>
+</html>

testing/web-platform/tests/focus/support/iframe-activeelement-after-focusing-out-same-site-iframes-outer.html

@@ -0,0 +1,34 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>iframe active element after focusing out same site iframes outer</title>
+<input></input></br>
+<iframe src="iframe-activeelement-after-focusing-out-iframes-inner.html"></iframe>
+<script>
+let outerlog = "outerlog:";
+
+let input = document.querySelector("input");
+let iframe = document.querySelector("iframe");
+window.onmessage = function(e) {
+  if (e.data == "ready") {
+    opener.postMessage("ready", "*");
+  } else if (e.data == "focus") {
+    outerlog += "willfocusinput,";
+    input.focus();
+    outerlog += "didfocusinput,";
+  } else if (e.data == "getlog") {
+    iframe.contentWindow.postMessage("getlog", "*");
+  } else {
+    opener.postMessage(outerlog + e.data, "*");
+  }
+};
+
+window.onload = function() {
+  window.onfocus = function() {
+    outerlog += "windowfocus,";
+  };
+
+  window.onblur = function() {
+    outerlog += "windowblur,";
+  };
+};
+</script>

testing/web-platform/tests/html/interaction/focus/focus-management/focus-events.html

@@ -25,6 +25,7 @@
     assert_true(e.isTrusted, "blur event is trusted");
     assert_false(e.bubbles, "blur event doesn't bubble");
     assert_false(e.cancelable, "blur event is not cancelable");
+    assert_equals(document.activeElement, document.body);
   });
 
   i1.focus();

toolkit/content/widgets/findbar.js

@@ -1147,6 +1147,8 @@
       }
 
       if (this.prefillWithSelection && userWantsPrefill) {
+        this.browser.finder.getInitialSelection();
+
         // NB: We have to focus this._findField here so tests that send
         // key events can open and close the find bar synchronously.
         this._findField.focus();
@@ -1157,7 +1159,6 @@
         // jumbled up queries.
         this._findField.select();
 
-        this.browser.finder.getInitialSelection();
         return startFindPromise;
       }
 

toolkit/modules/Finder.jsm

@@ -374,8 +374,8 @@ Finder.prototype = {
   },
 
   getInitialSelection() {
+    let initialSelection = this.getActiveSelectionText().selectedText;
     this._getWindow().setTimeout(() => {
-      let initialSelection = this.getActiveSelectionText().selectedText;
       for (let l of this._listeners) {
         try {
           l.onCurrentSelection(initialSelection, true);