Adding upstream version 115.8.0esr.upstream/115.8.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 389 insertions, 0 deletions

diff --git a/dom/base/nsWindowRoot.cpp b/dom/base/nsWindowRoot.cpp
new file mode 100644
index 0000000000..9cc04bbbf1
--- /dev/null
+++ b/dom/base/nsWindowRoot.cpp
@@ -0,0 +1,389 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 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/. */
+
+#include "mozilla/BasicEvents.h"
+#include "mozilla/EventDispatcher.h"
+#include "mozilla/EventListenerManager.h"
+#include "mozilla/StaticPrefs_browser.h"
+#include "mozilla/dom/WindowRootBinding.h"
+#include "nsCOMPtr.h"
+#include "nsWindowRoot.h"
+#include "nsPIDOMWindow.h"
+#include "nsPresContext.h"
+#include "nsLayoutCID.h"
+#include "nsContentCID.h"
+#include "nsString.h"
+#include "nsFrameLoaderOwner.h"
+#include "nsFrameLoader.h"
+#include "nsQueryActor.h"
+#include "nsGlobalWindow.h"
+#include "nsFocusManager.h"
+#include "nsIContent.h"
+#include "nsIControllers.h"
+#include "nsIController.h"
+#include "nsQueryObject.h"
+#include "xpcpublic.h"
+#include "nsCycleCollectionParticipant.h"
+#include "mozilla/dom/BrowserParent.h"
+#include "mozilla/dom/CanonicalBrowsingContext.h"
+#include "mozilla/dom/HTMLTextAreaElement.h"
+#include "mozilla/dom/HTMLInputElement.h"
+#include "mozilla/dom/JSActorService.h"
+#include "mozilla/dom/WindowGlobalParent.h"
+
+#include "nsXULElement.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+nsWindowRoot::nsWindowRoot(nsPIDOMWindowOuter* aWindow) { mWindow = aWindow; }
+
+nsWindowRoot::~nsWindowRoot() {
+  if (mListenerManager) {
+    mListenerManager->Disconnect();
+  }
+
+  JSActorService::UnregisterChromeEventTarget(this);
+}
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(nsWindowRoot)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsWindowRoot)
+  JSActorService::UnregisterChromeEventTarget(tmp);
+
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mWindow)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mListenerManager)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mParent)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsWindowRoot)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mWindow)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mListenerManager)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mParent)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsWindowRoot)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+  NS_INTERFACE_MAP_ENTRY(nsPIWindowRoot)
+  NS_INTERFACE_MAP_ENTRY(mozilla::dom::EventTarget)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(nsWindowRoot)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(nsWindowRoot)
+
+bool nsWindowRoot::DispatchEvent(Event& aEvent, CallerType aCallerType,
+                                 ErrorResult& aRv) {
+  nsEventStatus status = nsEventStatus_eIgnore;
+  nsresult rv = EventDispatcher::DispatchDOMEvent(
+      static_cast<EventTarget*>(this), nullptr, &aEvent, nullptr, &status);
+  bool retval = !aEvent.DefaultPrevented(aCallerType);
+  if (NS_FAILED(rv)) {
+    aRv.Throw(rv);
+  }
+  return retval;
+}
+
+bool nsWindowRoot::ComputeDefaultWantsUntrusted(ErrorResult& aRv) {
+  return false;
+}
+
+EventListenerManager* nsWindowRoot::GetOrCreateListenerManager() {
+  if (!mListenerManager) {
+    mListenerManager =
+        new EventListenerManager(static_cast<EventTarget*>(this));
+  }
+
+  return mListenerManager;
+}
+
+EventListenerManager* nsWindowRoot::GetExistingListenerManager() const {
+  return mListenerManager;
+}
+
+void nsWindowRoot::GetEventTargetParent(EventChainPreVisitor& aVisitor) {
+  aVisitor.mCanHandle = true;
+  aVisitor.mForceContentDispatch = true;  // FIXME! Bug 329119
+  // To keep mWindow alive
+  aVisitor.mItemData = static_cast<nsISupports*>(mWindow);
+  aVisitor.SetParentTarget(mParent, false);
+}
+
+nsresult nsWindowRoot::PostHandleEvent(EventChainPostVisitor& aVisitor) {
+  return NS_OK;
+}
+
+nsPIDOMWindowOuter* nsWindowRoot::GetOwnerGlobalForBindingsInternal() {
+  return mWindow;
+}
+
+nsIGlobalObject* nsWindowRoot::GetOwnerGlobal() const {
+  nsCOMPtr<nsIGlobalObject> global =
+      do_QueryInterface(mWindow->GetCurrentInnerWindow());
+  // We're still holding a ref to it, so returning the raw pointer is ok...
+  return global;
+}
+
+nsPIDOMWindowOuter* nsWindowRoot::GetWindow() { return mWindow; }
+
+nsresult nsWindowRoot::GetControllers(bool aForVisibleWindow,
+                                      nsIControllers** aResult) {
+  *aResult = nullptr;
+
+  // XXX: we should fix this so there's a generic interface that
+  // describes controllers, so this code would have no special
+  // knowledge of what object might have controllers.
+
+  nsFocusManager::SearchRange searchRange =
+      aForVisibleWindow ? nsFocusManager::eIncludeVisibleDescendants
+                        : nsFocusManager::eIncludeAllDescendants;
+  nsCOMPtr<nsPIDOMWindowOuter> focusedWindow;
+  nsIContent* focusedContent = nsFocusManager::GetFocusedDescendant(
+      mWindow, searchRange, getter_AddRefs(focusedWindow));
+  if (focusedContent) {
+    RefPtr<nsXULElement> xulElement = nsXULElement::FromNode(focusedContent);
+    if (xulElement) {
+      ErrorResult rv;
+      *aResult = xulElement->GetControllers(rv);
+      NS_IF_ADDREF(*aResult);
+      return rv.StealNSResult();
+    }
+
+    HTMLTextAreaElement* htmlTextArea =
+        HTMLTextAreaElement::FromNode(focusedContent);
+    if (htmlTextArea) return htmlTextArea->GetControllers(aResult);
+
+    HTMLInputElement* htmlInputElement =
+        HTMLInputElement::FromNode(focusedContent);
+    if (htmlInputElement) return htmlInputElement->GetControllers(aResult);
+
+    if (focusedContent->IsEditable() && focusedWindow)
+      return focusedWindow->GetControllers(aResult);
+  } else {
+    return focusedWindow->GetControllers(aResult);
+  }
+
+  return NS_OK;
+}
+
+nsresult nsWindowRoot::GetControllerForCommand(const char* aCommand,
+                                               bool aForVisibleWindow,
+                                               nsIController** _retval) {
+  NS_ENSURE_ARG_POINTER(_retval);
+  *_retval = nullptr;
+
+  // If this is the parent process, check if a child browsing context from
+  // another process is focused, and ask if it has a controller actor that
+  // supports the command.
+  if (XRE_IsParentProcess()) {
+    nsFocusManager* fm = nsFocusManager::GetFocusManager();
+    if (!fm) {
+      return NS_ERROR_FAILURE;
+    }
+
+    // Unfortunately, messages updating the active/focus state in the focus
+    // manager don't happen fast enough in the case when switching focus between
+    // processes when clicking on a chrome UI element while a child tab is
+    // focused, so we need to check whether the focus manager thinks a child
+    // frame is focused as well.
+    nsCOMPtr<nsPIDOMWindowOuter> focusedWindow;
+    nsIContent* focusedContent = nsFocusManager::GetFocusedDescendant(
+        mWindow, nsFocusManager::eIncludeAllDescendants,
+        getter_AddRefs(focusedWindow));
+    RefPtr<nsFrameLoaderOwner> loaderOwner = do_QueryObject(focusedContent);
+    if (loaderOwner) {
+      // Only check browsing contexts if a remote frame is focused. If chrome is
+      // focused, just check the controllers directly below.
+      RefPtr<nsFrameLoader> frameLoader = loaderOwner->GetFrameLoader();
+      if (frameLoader && frameLoader->IsRemoteFrame()) {
+        // GetActiveBrowsingContextInChrome actually returns the top-level
+        // browsing context if the focus is in a child process tab, or null if
+        // the focus is in chrome.
+        BrowsingContext* focusedBC =
+            fm->GetActiveBrowsingContextInChrome()
+                ? fm->GetFocusedBrowsingContextInChrome()
+                : nullptr;
+        if (focusedBC) {
+          // At this point, it is known that a child process is focused, so ask
+          // its Controllers actor if the command is supported.
+          nsCOMPtr<nsIController> controller = do_QueryActor(
+              "Controllers", focusedBC->Canonical()->GetCurrentWindowGlobal());
+          if (controller) {
+            bool supported;
+            controller->SupportsCommand(aCommand, &supported);
+            if (supported) {
+              controller.forget(_retval);
+              return NS_OK;
+            }
+          }
+        }
+      }
+    }
+  }
+
+  {
+    nsCOMPtr<nsIControllers> controllers;
+    GetControllers(aForVisibleWindow, getter_AddRefs(controllers));
+    if (controllers) {
+      nsCOMPtr<nsIController> controller;
+      controllers->GetControllerForCommand(aCommand,
+                                           getter_AddRefs(controller));
+      if (controller) {
+        controller.forget(_retval);
+        return NS_OK;
+      }
+    }
+  }
+
+  nsFocusManager::SearchRange searchRange =
+      aForVisibleWindow ? nsFocusManager::eIncludeVisibleDescendants
+                        : nsFocusManager::eIncludeAllDescendants;
+  nsCOMPtr<nsPIDOMWindowOuter> focusedWindow;
+  nsFocusManager::GetFocusedDescendant(mWindow, searchRange,
+                                       getter_AddRefs(focusedWindow));
+  while (focusedWindow) {
+    nsCOMPtr<nsIControllers> controllers;
+    focusedWindow->GetControllers(getter_AddRefs(controllers));
+    if (controllers) {
+      nsCOMPtr<nsIController> controller;
+      controllers->GetControllerForCommand(aCommand,
+                                           getter_AddRefs(controller));
+      if (controller) {
+        controller.forget(_retval);
+        return NS_OK;
+      }
+    }
+
+    // XXXndeakin P3 is this casting safe?
+    nsGlobalWindowOuter* win = nsGlobalWindowOuter::Cast(focusedWindow);
+    focusedWindow = win->GetPrivateParent();
+  }
+
+  return NS_OK;
+}
+
+void nsWindowRoot::GetEnabledDisabledCommandsForControllers(
+    nsIControllers* aControllers, nsTHashSet<nsCString>& aCommandsHandled,
+    nsTArray<nsCString>& aEnabledCommands,
+    nsTArray<nsCString>& aDisabledCommands) {
+  uint32_t controllerCount;
+  aControllers->GetControllerCount(&controllerCount);
+  for (uint32_t c = 0; c < controllerCount; c++) {
+    nsCOMPtr<nsIController> controller;
+    aControllers->GetControllerAt(c, getter_AddRefs(controller));
+
+    nsCOMPtr<nsICommandController> commandController(
+        do_QueryInterface(controller));
+    if (commandController) {
+      // All of our default command controllers have 20-60 commands.  Let's just
+      // leave enough space here for all of them so we probably don't need to
+      // heap-allocate.
+      AutoTArray<nsCString, 64> commands;
+      if (NS_SUCCEEDED(commandController->GetSupportedCommands(commands))) {
+        for (auto& commandStr : commands) {
+          // Use a hash to determine which commands have already been handled by
+          // earlier controllers, as the earlier controller's result should get
+          // priority.
+          if (aCommandsHandled.EnsureInserted(commandStr)) {
+            // We inserted a new entry into aCommandsHandled.
+            bool enabled = false;
+            controller->IsCommandEnabled(commandStr.get(), &enabled);
+
+            if (enabled) {
+              aEnabledCommands.AppendElement(commandStr);
+            } else {
+              aDisabledCommands.AppendElement(commandStr);
+            }
+          }
+        }
+      }
+    }
+  }
+}
+
+void nsWindowRoot::GetEnabledDisabledCommands(
+    nsTArray<nsCString>& aEnabledCommands,
+    nsTArray<nsCString>& aDisabledCommands) {
+  nsTHashSet<nsCString> commandsHandled;
+
+  nsCOMPtr<nsIControllers> controllers;
+  GetControllers(false, getter_AddRefs(controllers));
+  if (controllers) {
+    GetEnabledDisabledCommandsForControllers(
+        controllers, commandsHandled, aEnabledCommands, aDisabledCommands);
+  }
+
+  nsCOMPtr<nsPIDOMWindowOuter> focusedWindow;
+  nsFocusManager::GetFocusedDescendant(mWindow,
+                                       nsFocusManager::eIncludeAllDescendants,
+                                       getter_AddRefs(focusedWindow));
+  while (focusedWindow) {
+    focusedWindow->GetControllers(getter_AddRefs(controllers));
+    if (controllers) {
+      GetEnabledDisabledCommandsForControllers(
+          controllers, commandsHandled, aEnabledCommands, aDisabledCommands);
+    }
+
+    nsGlobalWindowOuter* win = nsGlobalWindowOuter::Cast(focusedWindow);
+    focusedWindow = win->GetPrivateParent();
+  }
+}
+
+already_AddRefed<nsINode> nsWindowRoot::GetPopupNode() {
+  nsCOMPtr<nsINode> popupNode = do_QueryReferent(mPopupNode);
+  return popupNode.forget();
+}
+
+void nsWindowRoot::SetPopupNode(nsINode* aNode) {
+  mPopupNode = do_GetWeakReference(aNode);
+}
+
+nsIGlobalObject* nsWindowRoot::GetParentObject() {
+  return xpc::NativeGlobal(xpc::PrivilegedJunkScope());
+}
+
+JSObject* nsWindowRoot::WrapObject(JSContext* aCx,
+                                   JS::Handle<JSObject*> aGivenProto) {
+  return mozilla::dom::WindowRoot_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+void nsWindowRoot::AddBrowser(nsIRemoteTab* aBrowser) {
+  nsWeakPtr weakBrowser = do_GetWeakReference(aBrowser);
+  mWeakBrowsers.Insert(weakBrowser);
+}
+
+void nsWindowRoot::RemoveBrowser(nsIRemoteTab* aBrowser) {
+  nsWeakPtr weakBrowser = do_GetWeakReference(aBrowser);
+  mWeakBrowsers.Remove(weakBrowser);
+}
+
+void nsWindowRoot::EnumerateBrowsers(BrowserEnumerator aEnumFunc, void* aArg) {
+  // Collect strong references to all browsers in a separate array in
+  // case aEnumFunc alters mWeakBrowsers.
+  nsTArray<nsCOMPtr<nsIRemoteTab>> remoteTabs;
+  for (const auto& key : mWeakBrowsers) {
+    nsCOMPtr<nsIRemoteTab> remoteTab(do_QueryReferent(key));
+    if (remoteTab) {
+      remoteTabs.AppendElement(remoteTab);
+    }
+  }
+
+  for (uint32_t i = 0; i < remoteTabs.Length(); ++i) {
+    aEnumFunc(remoteTabs[i], aArg);
+  }
+}
+
+///////////////////////////////////////////////////////////////////////////////////
+
+already_AddRefed<EventTarget> NS_NewWindowRoot(nsPIDOMWindowOuter* aWindow) {
+  nsCOMPtr<EventTarget> result = new nsWindowRoot(aWindow);
+
+  RefPtr<JSActorService> wasvc = JSActorService::GetSingleton();
+  wasvc->RegisterChromeEventTarget(result);
+
+  return result.forget();
+}