1 files changed, 301 insertions, 0 deletions
diff --git a/accessible/base/AccEvent.cpp b/accessible/base/AccEvent.cpp
new file mode 100644
index 0000000000..b32d55ca06
--- /dev/null
+++ b/accessible/base/AccEvent.cpp
@@ -0,0 +1,301 @@
+/* -*- 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 "TextRange.h"
+#include "xpcAccessibleDocument.h"
+#include "xpcAccessibleTextRange.h"
+
+#include "mozilla/dom/Selection.h"
+#include "mozilla/dom/UserActivation.h"
+
+#include "nsComponentManagerUtils.h"
+#include "nsIMutableArray.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, LocalAccessible* aAccessible,
+                   EIsFromUserInput aIsFromUserInput, EEventRule aEventRule)
+    : mEventType(aEventType), mEventRule(aEventRule), mAccessible(aAccessible) {
+  if (aIsFromUserInput == eAutoDetect) {
+    mIsFromUserInput = dom::UserActivation::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
+
+////////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////////
+// 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(LocalAccessible* 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(LocalAccessible* aTarget, bool aNeedsShutdown)
+    : AccMutationEvent(::nsIAccessibleEvent::EVENT_HIDE, aTarget),
+      mNeedsShutdown(aNeedsShutdown) {
+  mNextSibling = mAccessible->LocalNextSibling();
+  mPrevSibling = mAccessible->LocalPrevSibling();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// AccShowEvent
+////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////////////
+// AccTextSelChangeEvent
+////////////////////////////////////////////////////////////////////////////////
+
+AccTextSelChangeEvent::AccTextSelChangeEvent(HyperTextAccessible* aTarget,
+                                             dom::Selection* aSelection,
+                                             int32_t aReason,
+                                             int32_t aGranularity)
+    : AccEvent(nsIAccessibleEvent::EVENT_TEXT_SELECTION_CHANGED, aTarget,
+               eAutoDetect, eCoalesceTextSelChange),
+      mSel(aSelection),
+      mReason(aReason),
+      mGranularity(aGranularity) {}
+
+AccTextSelChangeEvent::~AccTextSelChangeEvent() {}
+
+bool AccTextSelChangeEvent::IsCaretMoveOnly() const {
+  return mSel->RangeCount() == 1 && mSel->IsCollapsed() &&
+         ((mReason & (nsISelectionListener::COLLAPSETOSTART_REASON |
+                      nsISelectionListener::COLLAPSETOEND_REASON)) == 0);
+}
+
+void AccTextSelChangeEvent::SelectionRanges(
+    nsTArray<TextRange>* aRanges) const {
+  TextRange::TextRangesFromSelection(mSel, aRanges);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// AccSelChangeEvent
+////////////////////////////////////////////////////////////////////////////////
+
+AccSelChangeEvent::AccSelChangeEvent(LocalAccessible* aWidget,
+                                     LocalAccessible* 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(LocalAccessible* aAccessible,
+                                         uint32_t aEventType,
+                                         int32_t aRowOrColIndex,
+                                         int32_t aNumRowsOrCols)
+    : AccEvent(aEventType, aAccessible),
+      mRowOrColIndex(aRowOrColIndex),
+      mNumRowsOrCols(aNumRowsOrCols) {}
+
+////////////////////////////////////////////////////////////////////////////////
+// AccVCChangeEvent
+////////////////////////////////////////////////////////////////////////////////
+
+AccVCChangeEvent::AccVCChangeEvent(LocalAccessible* aAccessible,
+                                   LocalAccessible* aOldAccessible,
+                                   int32_t aOldStart, int32_t aOldEnd,
+                                   LocalAccessible* aNewAccessible,
+                                   int32_t aNewStart, int32_t aNewEnd,
+                                   int16_t aReason, int16_t aBoundaryType,
+                                   EIsFromUserInput aIsFromUserInput)
+    : AccEvent(::nsIAccessibleEvent::EVENT_VIRTUALCURSOR_CHANGED, aAccessible,
+               aIsFromUserInput),
+      mOldAccessible(aOldAccessible),
+      mNewAccessible(aNewAccessible),
+      mOldStart(aOldStart),
+      mNewStart(aNewStart),
+      mOldEnd(aOldEnd),
+      mNewEnd(aNewEnd),
+      mReason(aReason),
+      mBoundaryType(aBoundaryType) {}
+
+already_AddRefed<nsIAccessibleEvent> a11y::MakeXPCEvent(AccEvent* aEvent) {
+  DocAccessible* doc = aEvent->Document();
+  LocalAccessible* acc = aEvent->GetAccessible();
+  nsINode* node = acc->GetNode();
+  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),
+                                         node, 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), node, 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), node,
+                                  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), node, fromUser,
+        cm->GetCaretOffset(), cm->IsSelectionCollapsed(), cm->IsAtEndOfLine(),
+        cm->GetGranularity());
+    return xpEvent.forget();
+  }
+
+  if (eventGroup & (1 << AccEvent::eTextSelChangeEvent)) {
+    AccTextSelChangeEvent* tsc = downcast_accEvent(aEvent);
+    AutoTArray<TextRange, 1> ranges;
+    tsc->SelectionRanges(&ranges);
+
+    nsCOMPtr<nsIMutableArray> xpcRanges =
+        do_CreateInstance(NS_ARRAY_CONTRACTID);
+    uint32_t len = ranges.Length();
+    for (uint32_t idx = 0; idx < len; idx++) {
+      xpcRanges->AppendElement(new xpcAccessibleTextRange(ranges[idx]));
+    }
+
+    xpEvent = new xpcAccTextSelectionChangeEvent(
+        type, ToXPC(acc), ToXPCDocument(doc), node, fromUser, xpcRanges);
+    return xpEvent.forget();
+  }
+
+  if (eventGroup & (1 << AccEvent::eVirtualCursorChangeEvent)) {
+    AccVCChangeEvent* vcc = downcast_accEvent(aEvent);
+    xpEvent = new xpcAccVirtualCursorChangeEvent(
+        type, ToXPC(acc), ToXPCDocument(doc), node, fromUser,
+        ToXPC(vcc->OldAccessible()), vcc->OldStartOffset(), vcc->OldEndOffset(),
+        ToXPC(vcc->NewAccessible()), vcc->NewStartOffset(), vcc->NewEndOffset(),
+        vcc->Reason(), vcc->BoundaryType());
+    return xpEvent.forget();
+  }
+
+  if (eventGroup & (1 << AccEvent::eObjectAttrChangedEvent)) {
+    AccObjectAttrChangedEvent* oac = downcast_accEvent(aEvent);
+    nsString attribute;
+    oac->GetAttribute()->ToString(attribute);
+    xpEvent = new xpcAccObjectAttributeChangedEvent(
+        type, ToXPC(acc), ToXPCDocument(doc), node, fromUser, attribute);
+    return xpEvent.forget();
+  }
+
+  if (eventGroup & (1 << AccEvent::eScrollingEvent)) {
+    AccScrollingEvent* sa = downcast_accEvent(aEvent);
+    xpEvent = new xpcAccScrollingEvent(
+        type, ToXPC(acc), ToXPCDocument(doc), node, fromUser, sa->ScrollX(),
+        sa->ScrollY(), sa->MaxScrollX(), sa->MaxScrollY());
+    return xpEvent.forget();
+  }
+
+  if (eventGroup & (1 << AccEvent::eAnnouncementEvent)) {
+    AccAnnouncementEvent* aa = downcast_accEvent(aEvent);
+    xpEvent = new xpcAccAnnouncementEvent(type, ToXPC(acc), ToXPCDocument(doc),
+                                          node, fromUser, aa->Announcement(),
+                                          aa->Priority());
+    return xpEvent.forget();
+  }
+
+  xpEvent =
+      new xpcAccEvent(type, ToXPC(acc), ToXPCDocument(doc), node, fromUser);
+  return xpEvent.forget();
+}