1 files changed, 228 insertions, 0 deletions
diff --git a/accessible/html/HTMLImageMapAccessible.cpp b/accessible/html/HTMLImageMapAccessible.cpp
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+++ b/accessible/html/HTMLImageMapAccessible.cpp
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+/* -*- Mode: C++; tab-width: 2; 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 "HTMLImageMapAccessible.h"
+
+#include "ARIAMap.h"
+#include "nsAccUtils.h"
+#include "DocAccessible-inl.h"
+#include "Role.h"
+
+#include "nsIDOMHTMLCollection.h"
+#include "nsIServiceManager.h"
+#include "nsIDOMElement.h"
+#include "nsIDOMHTMLAreaElement.h"
+#include "nsIFrame.h"
+#include "nsImageFrame.h"
+#include "nsImageMap.h"
+#include "nsIURI.h"
+
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLImageMapAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+HTMLImageMapAccessible::
+  HTMLImageMapAccessible(nsIContent* aContent, DocAccessible* aDoc) :
+  ImageAccessibleWrap(aContent, aDoc)
+{
+  mType = eImageMapType;
+
+  UpdateChildAreas(false);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLImageMapAccessible: nsISupports
+
+NS_IMPL_ISUPPORTS_INHERITED0(HTMLImageMapAccessible, ImageAccessible)
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLImageMapAccessible: Accessible public
+
+role
+HTMLImageMapAccessible::NativeRole()
+{
+  return roles::IMAGE_MAP;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLImageMapAccessible: HyperLinkAccessible
+
+uint32_t
+HTMLImageMapAccessible::AnchorCount()
+{
+  return ChildCount();
+}
+
+Accessible*
+HTMLImageMapAccessible::AnchorAt(uint32_t aAnchorIndex)
+{
+  return GetChildAt(aAnchorIndex);
+}
+
+already_AddRefed<nsIURI>
+HTMLImageMapAccessible::AnchorURIAt(uint32_t aAnchorIndex)
+{
+  Accessible* area = GetChildAt(aAnchorIndex);
+  if (!area)
+    return nullptr;
+
+  nsIContent* linkContent = area->GetContent();
+  return linkContent ? linkContent->GetHrefURI() : nullptr;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLImageMapAccessible: public
+
+void
+HTMLImageMapAccessible::UpdateChildAreas(bool aDoFireEvents)
+{
+  nsImageFrame* imageFrame = do_QueryFrame(mContent->GetPrimaryFrame());
+
+  // If image map is not initialized yet then we trigger one time more later.
+  nsImageMap* imageMapObj = imageFrame->GetExistingImageMap();
+  if (!imageMapObj)
+    return;
+
+  TreeMutation mt(this, TreeMutation::kNoEvents & !aDoFireEvents);
+
+  // Remove areas that are not a valid part of the image map anymore.
+  for (int32_t childIdx = mChildren.Length() - 1; childIdx >= 0; childIdx--) {
+    Accessible* area = mChildren.ElementAt(childIdx);
+    if (area->GetContent()->GetPrimaryFrame())
+      continue;
+
+    mt.BeforeRemoval(area);
+    RemoveChild(area);
+  }
+
+  // Insert new areas into the tree.
+  uint32_t areaElmCount = imageMapObj->AreaCount();
+  for (uint32_t idx = 0; idx < areaElmCount; idx++) {
+    nsIContent* areaContent = imageMapObj->GetAreaAt(idx);
+    Accessible* area = mChildren.SafeElementAt(idx);
+    if (!area || area->GetContent() != areaContent) {
+      RefPtr<Accessible> area = new HTMLAreaAccessible(areaContent, mDoc);
+      mDoc->BindToDocument(area, aria::GetRoleMap(areaContent->AsElement()));
+
+      if (!InsertChildAt(idx, area)) {
+        mDoc->UnbindFromDocument(area);
+        break;
+      }
+
+      mt.AfterInsertion(area);
+    }
+  }
+
+  mt.Done();
+}
+
+Accessible*
+HTMLImageMapAccessible::GetChildAccessibleFor(const nsINode* aNode) const
+{
+  uint32_t length = mChildren.Length();
+  for (uint32_t i = 0; i < length; i++) {
+    Accessible* area = mChildren[i];
+    if (area->GetContent() == aNode)
+      return area;
+  }
+
+  return nullptr;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLAreaAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+HTMLAreaAccessible::
+  HTMLAreaAccessible(nsIContent* aContent, DocAccessible* aDoc) :
+  HTMLLinkAccessible(aContent, aDoc)
+{
+  // Make HTML area DOM element not accessible. HTML image map accessible
+  // manages its tree itself.
+  mStateFlags |= eNotNodeMapEntry;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLAreaAccessible: Accessible
+
+ENameValueFlag
+HTMLAreaAccessible::NativeName(nsString& aName)
+{
+  ENameValueFlag nameFlag = Accessible::NativeName(aName);
+  if (!aName.IsEmpty())
+    return nameFlag;
+
+  if (!mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::alt, aName))
+    Value(aName);
+
+  return eNameOK;
+}
+
+void
+HTMLAreaAccessible::Description(nsString& aDescription)
+{
+  aDescription.Truncate();
+
+  // Still to do - follow IE's standard here
+  nsCOMPtr<nsIDOMHTMLAreaElement> area(do_QueryInterface(mContent));
+  if (area)
+    area->GetShape(aDescription);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLAreaAccessible: Accessible public
+
+Accessible*
+HTMLAreaAccessible::ChildAtPoint(int32_t aX, int32_t aY,
+                                 EWhichChildAtPoint aWhichChild)
+{
+  // Don't walk into area accessibles.
+  return this;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLImageMapAccessible: HyperLinkAccessible
+
+uint32_t
+HTMLAreaAccessible::StartOffset()
+{
+  // Image map accessible is not hypertext accessible therefore
+  // StartOffset/EndOffset implementations of Accessible doesn't work here.
+  // We return index in parent because image map contains area links only which
+  // are embedded objects.
+  // XXX: image map should be a hypertext accessible.
+  return IndexInParent();
+}
+
+uint32_t
+HTMLAreaAccessible::EndOffset()
+{
+  return IndexInParent() + 1;
+}
+
+nsRect
+HTMLAreaAccessible::RelativeBounds(nsIFrame** aBoundingFrame) const
+{
+  nsIFrame* frame = GetFrame();
+  if (!frame)
+    return nsRect();
+
+  nsImageFrame* imageFrame = do_QueryFrame(frame);
+  nsImageMap* map = imageFrame->GetImageMap();
+
+  nsRect bounds;
+  nsresult rv = map->GetBoundsForAreaContent(mContent, bounds);
+  if (NS_FAILED(rv))
+    return nsRect();
+
+  // XXX Areas are screwy; they return their rects as a pair of points, one pair
+  // stored into the width and height.
+  *aBoundingFrame = frame;
+  bounds.width -= bounds.x;
+  bounds.height -= bounds.y;
+  return bounds;
+}