Adding upstream version 115.7.0esr.upstream/115.7.0esr

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

1 files changed, 398 insertions, 0 deletions

diff --git a/dom/xul/XULMenuParentElement.cpp b/dom/xul/XULMenuParentElement.cpp
new file mode 100644
index 0000000000..f2e4d1e572
--- /dev/null
+++ b/dom/xul/XULMenuParentElement.cpp
@@ -0,0 +1,398 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "XULMenuParentElement.h"
+#include "XULButtonElement.h"
+#include "XULMenuBarElement.h"
+#include "XULPopupElement.h"
+#include "mozilla/LookAndFeel.h"
+#include "mozilla/StaticAnalysisFunctions.h"
+#include "mozilla/TextEvents.h"
+#include "mozilla/dom/DocumentInlines.h"
+#include "mozilla/dom/KeyboardEvent.h"
+#include "mozilla/EventDispatcher.h"
+#include "nsDebug.h"
+#include "nsMenuPopupFrame.h"
+#include "nsString.h"
+#include "nsStringFwd.h"
+#include "nsUTF8Utils.h"
+#include "nsXULElement.h"
+#include "nsXULPopupManager.h"
+
+namespace mozilla::dom {
+
+NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED_0(XULMenuParentElement,
+                                               nsXULElement)
+NS_IMPL_CYCLE_COLLECTION_INHERITED(XULMenuParentElement, nsXULElement,
+                                   mActiveItem)
+
+XULMenuParentElement::XULMenuParentElement(
+    already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
+    : nsXULElement(std::move(aNodeInfo)) {}
+
+XULMenuParentElement::~XULMenuParentElement() = default;
+
+class MenuActivateEvent final : public Runnable {
+ public:
+  MenuActivateEvent(Element* aMenu, bool aIsActivate)
+      : Runnable("MenuActivateEvent"), mMenu(aMenu), mIsActivate(aIsActivate) {}
+
+  // TODO: Convert this to MOZ_CAN_RUN_SCRIPT (bug 1415230, bug 1535398)
+  MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHOD Run() override {
+    nsAutoString domEventToFire;
+    if (mIsActivate) {
+      // Highlight the menu.
+      mMenu->SetAttr(kNameSpaceID_None, nsGkAtoms::menuactive, u"true"_ns,
+                     true);
+      // The menuactivated event is used by accessibility to track the user's
+      // movements through menus
+      domEventToFire.AssignLiteral("DOMMenuItemActive");
+    } else {
+      // Unhighlight the menu.
+      mMenu->UnsetAttr(kNameSpaceID_None, nsGkAtoms::menuactive, true);
+      domEventToFire.AssignLiteral("DOMMenuItemInactive");
+    }
+
+    RefPtr<nsPresContext> pc = mMenu->OwnerDoc()->GetPresContext();
+    RefPtr<dom::Event> event = NS_NewDOMEvent(mMenu, pc, nullptr);
+    event->InitEvent(domEventToFire, true, true);
+
+    event->SetTrusted(true);
+
+    EventDispatcher::DispatchDOMEvent(mMenu, nullptr, event, pc, nullptr);
+    return NS_OK;
+  }
+
+ private:
+  const RefPtr<Element> mMenu;
+  bool mIsActivate;
+};
+
+static void ActivateOrDeactivate(XULButtonElement& aButton, bool aActivate) {
+  if (!aButton.IsMenu()) {
+    return;
+  }
+
+  if (nsXULPopupManager* pm = nsXULPopupManager::GetInstance()) {
+    if (aActivate) {
+      // Cancel the close timer if selecting a menu within the popup to be
+      // closed.
+      pm->CancelMenuTimer(aButton.GetContainingPopupWithoutFlushing());
+    } else if (auto* popup = aButton.GetMenuPopupWithoutFlushing()) {
+      if (popup->IsOpen()) {
+        // Set up the close timer if deselecting an open sub-menu.
+        pm->HidePopupAfterDelay(popup, aButton.MenuOpenCloseDelay());
+      }
+    }
+  }
+
+  nsCOMPtr<nsIRunnable> event = new MenuActivateEvent(&aButton, aActivate);
+  aButton.OwnerDoc()->Dispatch(TaskCategory::Other, event.forget());
+}
+
+XULButtonElement* XULMenuParentElement::GetContainingMenu() const {
+  if (IsMenuBar()) {
+    return nullptr;
+  }
+  auto* button = XULButtonElement::FromNodeOrNull(GetParent());
+  if (!button || !button->IsMenu()) {
+    return nullptr;
+  }
+  return button;
+}
+
+void XULMenuParentElement::LockMenuUntilClosed(bool aLock) {
+  if (IsMenuBar()) {
+    return;
+  }
+  mLocked = aLock;
+  // Lock/Unlock the parent menu too.
+  if (XULButtonElement* menu = GetContainingMenu()) {
+    if (XULMenuParentElement* parent = menu->GetMenuParent()) {
+      parent->LockMenuUntilClosed(aLock);
+    }
+  }
+}
+
+void XULMenuParentElement::SetActiveMenuChild(XULButtonElement* aChild,
+                                              ByKey aByKey) {
+  if (aChild == mActiveItem) {
+    return;
+  }
+
+  if (mActiveItem) {
+    ActivateOrDeactivate(*mActiveItem, false);
+  }
+  mActiveItem = nullptr;
+
+  if (auto* menuBar = XULMenuBarElement::FromNode(*this)) {
+    // KnownLive because `this` is known-live by definition.
+    MOZ_KnownLive(menuBar)->SetActive(!!aChild);
+  }
+
+  if (!aChild) {
+    return;
+  }
+
+  // When a menu opens a submenu, the mouse will often be moved onto a sibling
+  // before moving onto an item within the submenu, causing the parent to become
+  // deselected. We need to ensure that the parent menu is reselected when an
+  // item in the submenu is selected.
+  if (RefPtr menu = GetContainingMenu()) {
+    if (RefPtr parent = menu->GetMenuParent()) {
+      parent->SetActiveMenuChild(menu, aByKey);
+    }
+  }
+
+  mActiveItem = aChild;
+  ActivateOrDeactivate(*mActiveItem, true);
+
+  if (IsInMenuList()) {
+    if (nsMenuPopupFrame* f = do_QueryFrame(GetPrimaryFrame())) {
+      f->EnsureActiveMenuListItemIsVisible();
+#ifdef XP_WIN
+      // On Windows, a menulist should update its value whenever navigation was
+      // done by the keyboard.
+      //
+      // NOTE(emilio): This is a rather odd per-platform behavior difference,
+      // but other browsers also do this.
+      if (aByKey == ByKey::Yes && f->IsOpen()) {
+        // Fire a command event as the new item, but we don't want to close the
+        // menu, blink it, or update any other state of the menuitem. The
+        // command event will cause the item to be selected.
+        RefPtr<mozilla::PresShell> presShell = OwnerDoc()->GetPresShell();
+        nsContentUtils::DispatchXULCommand(aChild, /* aTrusted = */ true,
+                                           nullptr, presShell, false, false,
+                                           false, false);
+      }
+#endif
+    }
+  }
+}
+
+static bool IsValidMenuItem(const XULMenuParentElement& aMenuParent,
+                            const nsIContent& aContent) {
+  const auto* button = XULButtonElement::FromNode(aContent);
+  if (!button || !button->IsMenu()) {
+    return false;
+  }
+  if (!button->GetPrimaryFrame()) {
+    // Hidden buttons are not focusable/activatable.
+    return false;
+  }
+  if (!button->IsDisabled()) {
+    return true;
+  }
+  // In the menubar or a menulist disabled items are always skipped.
+  const bool skipDisabled =
+      LookAndFeel::GetInt(LookAndFeel::IntID::SkipNavigatingDisabledMenuItem) ||
+      aMenuParent.IsMenuBar() || aMenuParent.IsInMenuList();
+  return !skipDisabled;
+}
+
+enum class StartKind { Parent, Item };
+
+template <bool aForward>
+static XULButtonElement* DoGetNextMenuItem(
+    const XULMenuParentElement& aMenuParent, const nsIContent& aStart,
+    StartKind aStartKind) {
+  nsIContent* start =
+      aStartKind == StartKind::Item
+          ? (aForward ? aStart.GetNextSibling() : aStart.GetPreviousSibling())
+          : (aForward ? aStart.GetFirstChild() : aStart.GetLastChild());
+  for (nsIContent* node = start; node;
+       node = aForward ? node->GetNextSibling() : node->GetPreviousSibling()) {
+    if (IsValidMenuItem(aMenuParent, *node)) {
+      return static_cast<XULButtonElement*>(node);
+    }
+    if (node->IsXULElement(nsGkAtoms::menugroup)) {
+      if (XULButtonElement* child = DoGetNextMenuItem<aForward>(
+              aMenuParent, *node, StartKind::Parent)) {
+        return child;
+      }
+    }
+  }
+  if (aStartKind == StartKind::Item && aStart.GetParent() &&
+      aStart.GetParent()->IsXULElement(nsGkAtoms::menugroup)) {
+    // We haven't found anything in aStart's sibling list, but if we're in a
+    // group we need to keep looking.
+    return DoGetNextMenuItem<aForward>(aMenuParent, *aStart.GetParent(),
+                                       StartKind::Item);
+  }
+  return nullptr;
+}
+
+XULButtonElement* XULMenuParentElement::GetFirstMenuItem() const {
+  return DoGetNextMenuItem<true>(*this, *this, StartKind::Parent);
+}
+
+XULButtonElement* XULMenuParentElement::GetLastMenuItem() const {
+  return DoGetNextMenuItem<false>(*this, *this, StartKind::Parent);
+}
+
+XULButtonElement* XULMenuParentElement::GetNextMenuItemFrom(
+    const XULButtonElement& aStartingItem) const {
+  return DoGetNextMenuItem<true>(*this, aStartingItem, StartKind::Item);
+}
+
+XULButtonElement* XULMenuParentElement::GetPrevMenuItemFrom(
+    const XULButtonElement& aStartingItem) const {
+  return DoGetNextMenuItem<false>(*this, aStartingItem, StartKind::Item);
+}
+
+XULButtonElement* XULMenuParentElement::GetNextMenuItem(Wrap aWrap) const {
+  if (mActiveItem) {
+    if (auto* next = GetNextMenuItemFrom(*mActiveItem)) {
+      return next;
+    }
+    if (aWrap == Wrap::No) {
+      return nullptr;
+    }
+  }
+  return GetFirstMenuItem();
+}
+
+XULButtonElement* XULMenuParentElement::GetPrevMenuItem(Wrap aWrap) const {
+  if (mActiveItem) {
+    if (auto* prev = GetPrevMenuItemFrom(*mActiveItem)) {
+      return prev;
+    }
+    if (aWrap == Wrap::No) {
+      return nullptr;
+    }
+  }
+  return GetLastMenuItem();
+}
+
+void XULMenuParentElement::SelectFirstItem() {
+  if (RefPtr firstItem = GetFirstMenuItem()) {
+    SetActiveMenuChild(firstItem);
+  }
+}
+
+XULButtonElement* XULMenuParentElement::FindMenuWithShortcut(
+    KeyboardEvent& aKeyEvent) const {
+  using AccessKeyArray = AutoTArray<uint32_t, 10>;
+  AccessKeyArray accessKeys;
+  WidgetKeyboardEvent* nativeKeyEvent =
+      aKeyEvent.WidgetEventPtr()->AsKeyboardEvent();
+  if (nativeKeyEvent) {
+    nativeKeyEvent->GetAccessKeyCandidates(accessKeys);
+  }
+  const uint32_t charCode = aKeyEvent.CharCode();
+  if (accessKeys.IsEmpty() && charCode) {
+    accessKeys.AppendElement(charCode);
+  }
+  if (accessKeys.IsEmpty()) {
+    return nullptr;  // no character was pressed so just return
+  }
+  XULButtonElement* foundMenu = nullptr;
+  size_t foundIndex = AccessKeyArray::NoIndex;
+  for (auto* item = GetFirstMenuItem(); item;
+       item = GetNextMenuItemFrom(*item)) {
+    nsAutoString shortcutKey;
+    item->GetAttr(nsGkAtoms::accesskey, shortcutKey);
+    if (shortcutKey.IsEmpty()) {
+      continue;
+    }
+
+    ToLowerCase(shortcutKey);
+    const char16_t* start = shortcutKey.BeginReading();
+    const char16_t* end = shortcutKey.EndReading();
+    uint32_t ch = UTF16CharEnumerator::NextChar(&start, end);
+    size_t index = accessKeys.IndexOf(ch);
+    if (index == AccessKeyArray::NoIndex) {
+      continue;
+    }
+    if (foundIndex == AccessKeyArray::NoIndex || index < foundIndex) {
+      foundMenu = item;
+      foundIndex = index;
+    }
+  }
+  return foundMenu;
+}
+
+XULButtonElement* XULMenuParentElement::FindMenuWithShortcut(
+    const nsAString& aString, bool& aDoAction) const {
+  aDoAction = false;
+  uint32_t accessKeyMatchCount = 0;
+  uint32_t matchCount = 0;
+
+  XULButtonElement* foundAccessKeyMenu = nullptr;
+  XULButtonElement* foundMenuBeforeCurrent = nullptr;
+  XULButtonElement* foundMenuAfterCurrent = nullptr;
+
+  bool foundActive = false;
+  for (auto* item = GetFirstMenuItem(); item;
+       item = GetNextMenuItemFrom(*item)) {
+    nsAutoString textKey;
+    // Get the shortcut attribute.
+    item->GetAttr(nsGkAtoms::accesskey, textKey);
+    const bool isAccessKey = !textKey.IsEmpty();
+    if (textKey.IsEmpty()) {  // No shortcut, try first letter
+      item->GetAttr(nsGkAtoms::label, textKey);
+      if (textKey.IsEmpty()) {  // No label, try another attribute (value)
+        item->GetAttr(nsGkAtoms::value, textKey);
+      }
+    }
+
+    const bool isActive = item == GetActiveMenuChild();
+    foundActive |= isActive;
+
+    if (!StringBeginsWith(
+            nsContentUtils::TrimWhitespace<
+                nsContentUtils::IsHTMLWhitespaceOrNBSP>(textKey, false),
+            aString, nsCaseInsensitiveStringComparator)) {
+      continue;
+    }
+    // There is one match
+    matchCount++;
+    if (isAccessKey) {
+      // There is one shortcut-key match
+      accessKeyMatchCount++;
+      // Record the matched item. If there is only one matched shortcut
+      // item, do it
+      foundAccessKeyMenu = item;
+    }
+    // Get the active status
+    if (isActive && aString.Length() > 1 && !foundMenuBeforeCurrent) {
+      // If there is more than one char typed and the current item matches, the
+      // current item has highest priority, otherwise the item next to current
+      // has highest priority.
+      return item;
+    }
+    if (!foundActive || isActive) {
+      // It's a first candidate item located before/on the current item
+      if (!foundMenuBeforeCurrent) {
+        foundMenuBeforeCurrent = item;
+      }
+    } else {
+      if (!foundMenuAfterCurrent) {
+        foundMenuAfterCurrent = item;
+      }
+    }
+  }
+
+  aDoAction = !IsInMenuList() && (matchCount == 1 || accessKeyMatchCount == 1);
+
+  if (accessKeyMatchCount == 1) {
+    // We have one matched accesskey item
+    return foundAccessKeyMenu;
+  }
+  // If we have matched an item after the current, use it.
+  if (foundMenuAfterCurrent) {
+    return foundMenuAfterCurrent;
+  }
+  // If we haven't, use the item before the current, if any.
+  return foundMenuBeforeCurrent;
+}
+
+void XULMenuParentElement::HandleEnterKeyPress(WidgetEvent& aEvent) {
+  if (RefPtr child = GetActiveMenuChild()) {
+    child->HandleEnterKeyPress(aEvent);
+  }
+}
+
+}  // namespace mozilla::dom