Add m-esr52 at 52.6.0

1 files changed, 271 insertions, 0 deletions

diff --git a/accessible/base/AccEvent.cpp b/accessible/base/AccEvent.cpp
new file mode 100644
index 000000000..a27ceacb9
--- /dev/null
+++ b/accessible/base/AccEvent.cpp
@@ -0,0 +1,271 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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 "AccEvent.h"
+
+#include "nsAccUtils.h"
+#include "DocAccessible.h"
+#include "xpcAccEvents.h"
+#include "States.h"
+#include "xpcAccessibleDocument.h"
+
+#include "mozilla/EventStateManager.h"
+#include "mozilla/dom/Selection.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+static_assert(static_cast<bool>(eNoUserInput) == false &&
+              static_cast<bool>(eFromUserInput) == true,
+              "EIsFromUserInput cannot be casted to bool");
+
+////////////////////////////////////////////////////////////////////////////////
+// AccEvent
+////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////////////
+// AccEvent constructors
+
+AccEvent::AccEvent(uint32_t aEventType, Accessible* aAccessible,
+                   EIsFromUserInput aIsFromUserInput, EEventRule aEventRule) :
+  mEventType(aEventType), mEventRule(aEventRule), mAccessible(aAccessible)
+{
+  if (aIsFromUserInput == eAutoDetect)
+    mIsFromUserInput = EventStateManager::IsHandlingUserInput();
+  else
+    mIsFromUserInput = aIsFromUserInput == eFromUserInput ? true : false;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// AccEvent cycle collection
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(AccEvent)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(AccEvent)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mAccessible)
+  if (AccTreeMutationEvent* tmEvent = downcast_accEvent(tmp)) {
+    tmEvent->SetNextEvent(nullptr);
+    tmEvent->SetPrevEvent(nullptr);
+  }
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(AccEvent)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAccessible)
+  if (AccTreeMutationEvent* tmEvent = downcast_accEvent(tmp)) {
+    CycleCollectionNoteChild(cb, tmEvent->NextEvent(), "mNext");
+    CycleCollectionNoteChild(cb, tmEvent->PrevEvent(), "mPrevEvent");
+  }
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(AccEvent, AddRef)
+NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(AccEvent, Release)
+
+////////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+// AccTextChangeEvent
+////////////////////////////////////////////////////////////////////////////////
+
+// Note: we pass in eAllowDupes to the base class because we don't support text
+// events coalescence. We fire delayed text change events in DocAccessible but
+// we continue to base the event off the accessible object rather than just the
+// node. This means we won't try to create an accessible based on the node when
+// we are ready to fire the event and so we will no longer assert at that point
+// if the node was removed from the document. Either way, the AT won't work with
+// a defunct accessible so the behaviour should be equivalent.
+AccTextChangeEvent::
+  AccTextChangeEvent(Accessible* aAccessible, int32_t aStart,
+                     const nsAString& aModifiedText, bool aIsInserted,
+                     EIsFromUserInput aIsFromUserInput)
+  : AccEvent(aIsInserted ?
+             static_cast<uint32_t>(nsIAccessibleEvent::EVENT_TEXT_INSERTED) :
+             static_cast<uint32_t>(nsIAccessibleEvent::EVENT_TEXT_REMOVED),
+             aAccessible, aIsFromUserInput, eAllowDupes)
+  , mStart(aStart)
+  , mIsInserted(aIsInserted)
+  , mModifiedText(aModifiedText)
+{
+  // XXX We should use IsFromUserInput here, but that isn't always correct
+  // when the text change isn't related to content insertion or removal.
+   mIsFromUserInput = mAccessible->State() &
+    (states::FOCUSED | states::EDITABLE);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// AccHideEvent
+////////////////////////////////////////////////////////////////////////////////
+
+AccHideEvent::
+  AccHideEvent(Accessible* aTarget, bool aNeedsShutdown) :
+  AccMutationEvent(::nsIAccessibleEvent::EVENT_HIDE, aTarget),
+  mNeedsShutdown(aNeedsShutdown)
+{
+  mNextSibling = mAccessible->NextSibling();
+  mPrevSibling = mAccessible->PrevSibling();
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+// AccShowEvent
+////////////////////////////////////////////////////////////////////////////////
+
+AccShowEvent::
+  AccShowEvent(Accessible* aTarget) :
+  AccMutationEvent(::nsIAccessibleEvent::EVENT_SHOW, aTarget)
+{
+  int32_t idx = aTarget->IndexInParent();
+  MOZ_ASSERT(idx >= 0);
+  mInsertionIndex = idx;
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+// AccTextSelChangeEvent
+////////////////////////////////////////////////////////////////////////////////
+
+AccTextSelChangeEvent::AccTextSelChangeEvent(HyperTextAccessible* aTarget,
+                                             dom::Selection* aSelection,
+                                             int32_t aReason) :
+  AccEvent(nsIAccessibleEvent::EVENT_TEXT_SELECTION_CHANGED, aTarget,
+           eAutoDetect, eCoalesceTextSelChange),
+  mSel(aSelection), mReason(aReason) {}
+
+AccTextSelChangeEvent::~AccTextSelChangeEvent() { }
+
+bool
+AccTextSelChangeEvent::IsCaretMoveOnly() const
+{
+  return mSel->RangeCount() == 1 && mSel->IsCollapsed() &&
+    ((mReason & (nsISelectionListener::COLLAPSETOSTART_REASON |
+                 nsISelectionListener::COLLAPSETOEND_REASON)) == 0);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// AccSelChangeEvent
+////////////////////////////////////////////////////////////////////////////////
+
+AccSelChangeEvent::
+  AccSelChangeEvent(Accessible* aWidget, Accessible* aItem,
+                    SelChangeType aSelChangeType) :
+    AccEvent(0, aItem, eAutoDetect, eCoalesceSelectionChange),
+    mWidget(aWidget), mItem(aItem), mSelChangeType(aSelChangeType),
+    mPreceedingCount(0), mPackedEvent(nullptr)
+{
+  if (aSelChangeType == eSelectionAdd) {
+    if (mWidget->GetSelectedItem(1))
+      mEventType = nsIAccessibleEvent::EVENT_SELECTION_ADD;
+    else
+      mEventType = nsIAccessibleEvent::EVENT_SELECTION;
+  } else {
+    mEventType = nsIAccessibleEvent::EVENT_SELECTION_REMOVE;
+  }
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+// AccTableChangeEvent
+////////////////////////////////////////////////////////////////////////////////
+
+AccTableChangeEvent::
+  AccTableChangeEvent(Accessible* aAccessible, uint32_t aEventType,
+                      int32_t aRowOrColIndex, int32_t aNumRowsOrCols) :
+  AccEvent(aEventType, aAccessible),
+  mRowOrColIndex(aRowOrColIndex), mNumRowsOrCols(aNumRowsOrCols)
+{
+}
+
+
+////////////////////////////////////////////////////////////////////////////////
+// AccVCChangeEvent
+////////////////////////////////////////////////////////////////////////////////
+
+AccVCChangeEvent::
+  AccVCChangeEvent(Accessible* aAccessible,
+                   Accessible* aOldAccessible,
+                   int32_t aOldStart, int32_t aOldEnd,
+                   int16_t aReason, EIsFromUserInput aIsFromUserInput) :
+    AccEvent(::nsIAccessibleEvent::EVENT_VIRTUALCURSOR_CHANGED, aAccessible,
+             aIsFromUserInput),
+    mOldAccessible(aOldAccessible), mOldStart(aOldStart), mOldEnd(aOldEnd),
+    mReason(aReason)
+{
+}
+
+already_AddRefed<nsIAccessibleEvent>
+a11y::MakeXPCEvent(AccEvent* aEvent)
+{
+  DocAccessible* doc = aEvent->Document();
+  Accessible* acc = aEvent->GetAccessible();
+  nsINode* node = acc->GetNode();
+  nsIDOMNode* domNode = node ? node->AsDOMNode() : nullptr;
+  bool fromUser = aEvent->IsFromUserInput();
+  uint32_t type = aEvent->GetEventType();
+  uint32_t eventGroup = aEvent->GetEventGroups();
+  nsCOMPtr<nsIAccessibleEvent> xpEvent;
+
+  if (eventGroup & (1 << AccEvent::eStateChangeEvent)) {
+    AccStateChangeEvent* sc = downcast_accEvent(aEvent);
+    bool extra = false;
+    uint32_t state = nsAccUtils::To32States(sc->GetState(), &extra);
+    xpEvent = new xpcAccStateChangeEvent(type, ToXPC(acc), ToXPCDocument(doc),
+                                         domNode, fromUser,
+                                         state, extra, sc->IsStateEnabled());
+    return xpEvent.forget();
+  }
+
+  if (eventGroup & (1 << AccEvent::eTextChangeEvent)) {
+    AccTextChangeEvent* tc = downcast_accEvent(aEvent);
+    nsString text;
+    tc->GetModifiedText(text);
+    xpEvent = new xpcAccTextChangeEvent(type, ToXPC(acc), ToXPCDocument(doc),
+                                        domNode, fromUser,
+                                        tc->GetStartOffset(), tc->GetLength(),
+                                        tc->IsTextInserted(), text);
+    return xpEvent.forget();
+  }
+
+  if (eventGroup & (1 << AccEvent::eHideEvent)) {
+    AccHideEvent* hideEvent = downcast_accEvent(aEvent);
+    xpEvent = new xpcAccHideEvent(type, ToXPC(acc), ToXPCDocument(doc),
+                                  domNode, fromUser,
+                                  ToXPC(hideEvent->TargetParent()),
+                                  ToXPC(hideEvent->TargetNextSibling()),
+                                  ToXPC(hideEvent->TargetPrevSibling()));
+    return xpEvent.forget();
+  }
+
+  if (eventGroup & (1 << AccEvent::eCaretMoveEvent)) {
+    AccCaretMoveEvent* cm = downcast_accEvent(aEvent);
+    xpEvent = new xpcAccCaretMoveEvent(type, ToXPC(acc), ToXPCDocument(doc),
+                                       domNode, fromUser,
+                                       cm->GetCaretOffset());
+    return xpEvent.forget();
+  }
+
+  if (eventGroup & (1 << AccEvent::eVirtualCursorChangeEvent)) {
+    AccVCChangeEvent* vcc = downcast_accEvent(aEvent);
+    xpEvent = new xpcAccVirtualCursorChangeEvent(type,
+                                                 ToXPC(acc), ToXPCDocument(doc),
+                                                 domNode, fromUser,
+                                                 ToXPC(vcc->OldAccessible()),
+                                                 vcc->OldStartOffset(),
+                                                 vcc->OldEndOffset(),
+                                                 vcc->Reason());
+    return xpEvent.forget();
+  }
+
+  if (eventGroup & (1 << AccEvent::eObjectAttrChangedEvent)) {
+    AccObjectAttrChangedEvent* oac = downcast_accEvent(aEvent);
+    xpEvent = new xpcAccObjectAttributeChangedEvent(type,
+                                                    ToXPC(acc),
+                                                    ToXPCDocument(doc), domNode,
+                                                    fromUser,
+                                                    oac->GetAttribute());
+    return xpEvent.forget();
+  }
+
+  xpEvent = new xpcAccEvent(type, ToXPC(acc), ToXPCDocument(doc), domNode, fromUser);
+  return xpEvent.forget();
+  }