accessible/base/nsEventShell.cpp

   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 #include "nsEventShell.h"
   7
   8 #include "nsAccUtils.h"
   9 #include "Logging.h"
  10
  11 #include "mozilla/StaticPtr.h"
  12
  13 using namespace mozilla;
  14 using namespace mozilla::a11y;
  15
  16 ////////////////////////////////////////////////////////////////////////////////
  17 // nsEventShell
  18 ////////////////////////////////////////////////////////////////////////////////
  19
  20 void nsEventShell::FireEvent(AccEvent* aEvent) {
  21   if (!aEvent || aEvent->mEventRule == AccEvent::eDoNotEmit) return;
  22
  23   Accessible* accessible = aEvent->GetAccessible();
  24   NS_ENSURE_TRUE_VOID(accessible);
  25
  26   nsINode* node = accessible->GetNode();
  27   if (node) {
  28     sEventTargetNode = node;
  29     sEventFromUserInput = aEvent->IsFromUserInput();
  30   }
  31
  32 #ifdef A11Y_LOG
  33   if (logging::IsEnabled(logging::eEvents)) {
  34     logging::MsgBegin("EVENTS", "events fired");
  35     nsAutoString type;
  36     GetAccService()->GetStringEventType(aEvent->GetEventType(), type);
  37     logging::MsgEntry("type: %s", NS_ConvertUTF16toUTF8(type).get());
  38     logging::AccessibleInfo("target", aEvent->GetAccessible());
  39     logging::MsgEnd();
  40   }
  41 #endif
  42
  43   accessible->HandleAccEvent(aEvent);
  44   aEvent->mEventRule = AccEvent::eDoNotEmit;
  45
  46   sEventTargetNode = nullptr;
  47 }
  48
  49 void nsEventShell::FireEvent(uint32_t aEventType, Accessible* aAccessible,
  50                              EIsFromUserInput aIsFromUserInput) {
  51   NS_ENSURE_TRUE_VOID(aAccessible);
  52
  53   RefPtr<AccEvent> event =
  54       new AccEvent(aEventType, aAccessible, aIsFromUserInput);
  55
  56   FireEvent(event);
  57 }
  58
  59 void nsEventShell::GetEventAttributes(nsINode* aNode,
  60                                       nsIPersistentProperties* aAttributes) {
  61   if (aNode != sEventTargetNode) return;
  62
  63   nsAccUtils::SetAccAttr(aAttributes, nsGkAtoms::eventFromInput,
  64                          sEventFromUserInput ? NS_LITERAL_STRING("true")
  65                                              : NS_LITERAL_STRING("false"));
  66 }
  67
  68 ////////////////////////////////////////////////////////////////////////////////
  69 // nsEventShell: private
  70
  71 bool nsEventShell::sEventFromUserInput = false;
  72 StaticRefPtr<nsINode> nsEventShell::sEventTargetNode;