tor-browser

The Tor Browser
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RootAccessible.h (2701B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 #ifndef mozilla_a11y_RootAccessible_h__
      7 #define mozilla_a11y_RootAccessible_h__
      8 
      9 #include "HyperTextAccessible.h"
     10 #include "DocAccessibleWrap.h"
     11 
     12 #include "nsIDOMEventListener.h"
     13 
     14 namespace mozilla {
     15 
     16 class PresShell;
     17 
     18 namespace a11y {
     19 
     20 /**
     21 * The node at a root of the accessibility tree. This node originated in the
     22 * current process. If this is the parent process, RootAccessible is the
     23 * Accessible for the top-level window. If this is a content process,
     24 * RootAccessible is a top-level content document in this process, which is
     25 * either a tab document or an out-of-process iframe.
     26 */
     27 class RootAccessible : public DocAccessibleWrap, public nsIDOMEventListener {
     28  NS_DECL_ISUPPORTS_INHERITED
     29 
     30 public:
     31  RootAccessible(dom::Document* aDocument, PresShell* aPresShell);
     32 
     33  // nsIDOMEventListener
     34  NS_DECL_NSIDOMEVENTLISTENER
     35 
     36  // LocalAccessible
     37  virtual void Shutdown() override;
     38  virtual mozilla::a11y::ENameValueFlag DirectName(
     39      nsString& aName) const override;
     40  virtual Relation RelationByType(RelationType aType) const override;
     41  virtual uint64_t NativeState() const override;
     42 
     43  // RootAccessible
     44 
     45  /**
     46   * Notify that the sub document presshell was activated.
     47   */
     48  virtual void DocumentActivated(DocAccessible* aDocument);
     49 
     50  /**
     51   * Return the primary remote top level document if any.
     52   */
     53  RemoteAccessible* GetPrimaryRemoteTopLevelContentDoc() const;
     54 
     55 protected:
     56  virtual ~RootAccessible();
     57 
     58  /**
     59   * Add/remove DOM event listeners.
     60   */
     61  virtual nsresult AddEventListeners() override;
     62  virtual nsresult RemoveEventListeners() override;
     63 
     64  /**
     65   * Process the DOM event.
     66   */
     67  void ProcessDOMEvent(dom::Event* aDOMEvent, nsINode* aTarget);
     68 
     69  /**
     70   * Process "popupshown" event. Used by HandleEvent().
     71   */
     72  void HandlePopupShownEvent(LocalAccessible* aAccessible);
     73 
     74  /*
     75   * Process "popuphiding" event. Used by HandleEvent().
     76   */
     77  void HandlePopupHidingEvent(nsINode* aNode);
     78 
     79  void HandleTreeRowCountChangedEvent(dom::Event* aEvent,
     80                                      XULTreeAccessible* aAccessible);
     81  void HandleTreeInvalidatedEvent(dom::Event* aEvent,
     82                                  XULTreeAccessible* aAccessible);
     83 
     84  uint32_t GetChromeFlags() const;
     85 };
     86 
     87 inline RootAccessible* LocalAccessible::AsRoot() {
     88  return IsRoot() ? static_cast<mozilla::a11y::RootAccessible*>(this) : nullptr;
     89 }
     90 
     91 }  // namespace a11y
     92 }  // namespace mozilla
     93 
     94 #endif