Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 200 insertions, 0 deletions

diff --git a/accessible/html/HTMLImageMapAccessible.cpp b/accessible/html/HTMLImageMapAccessible.cpp
new file mode 100644
index 0000000000..14dd485875
--- /dev/null
+++ b/accessible/html/HTMLImageMapAccessible.cpp
@@ -0,0 +1,200 @@
+/* -*- 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 "EventTree.h"
+#include "mozilla/a11y/Role.h"
+
+#include "nsCoreUtils.h"
+#include "nsIFrame.h"
+#include "nsImageFrame.h"
+#include "nsImageMap.h"
+#include "nsLayoutUtils.h"
+#include "mozilla/dom/HTMLAreaElement.h"
+
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLImageMapAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+HTMLImageMapAccessible::HTMLImageMapAccessible(nsIContent* aContent,
+                                               DocAccessible* aDoc)
+    : ImageAccessible(aContent, aDoc) {
+  mType = eImageMapType;
+
+  UpdateChildAreas(false);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLImageMapAccessible: LocalAccessible public
+
+role HTMLImageMapAccessible::NativeRole() const { return roles::IMAGE_MAP; }
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLImageMapAccessible: public
+
+void HTMLImageMapAccessible::UpdateChildAreas(bool aDoFireEvents) {
+  if (!mContent || !mContent->GetPrimaryFrame()) {
+    return;
+  }
+  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--) {
+    LocalAccessible* 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);
+    LocalAccessible* area = mChildren.SafeElementAt(idx);
+    if (!area || area->GetContent() != areaContent) {
+      RefPtr<LocalAccessible> 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();
+}
+
+LocalAccessible* HTMLImageMapAccessible::GetChildAccessibleFor(
+    const nsINode* aNode) const {
+  uint32_t length = mChildren.Length();
+  for (uint32_t i = 0; i < length; i++) {
+    LocalAccessible* 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: LocalAccessible
+
+role HTMLAreaAccessible::NativeRole() const {
+  // A link element without an href attribute and without a click listener
+  // should be reported as a generic.
+  if (mContent->IsElement()) {
+    dom::Element* element = mContent->AsElement();
+    if (!element->HasAttr(nsGkAtoms::href) &&
+        !nsCoreUtils::HasClickListener(element)) {
+      return roles::TEXT;
+    }
+  }
+  return HTMLLinkAccessible::NativeRole();
+}
+
+ENameValueFlag HTMLAreaAccessible::NativeName(nsString& aName) const {
+  ENameValueFlag nameFlag = LocalAccessible::NativeName(aName);
+  if (!aName.IsEmpty()) return nameFlag;
+
+  if (!mContent->AsElement()->GetAttr(nsGkAtoms::alt, aName)) {
+    Value(aName);
+  }
+
+  return eNameOK;
+}
+
+void HTMLAreaAccessible::Description(nsString& aDescription) const {
+  aDescription.Truncate();
+
+  // Still to do - follow IE's standard here
+  RefPtr<dom::HTMLAreaElement> area =
+      dom::HTMLAreaElement::FromNodeOrNull(mContent);
+  if (area) area->GetShape(aDescription);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// HTMLAreaAccessible: LocalAccessible public
+
+LocalAccessible* HTMLAreaAccessible::LocalChildAtPoint(
+    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 LocalAccessible 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.SizeTo(bounds.Width() - bounds.X(), bounds.Height() - bounds.Y());
+  return bounds;
+}
+
+nsRect HTMLAreaAccessible::ParentRelativeBounds() {
+  nsIFrame* boundingFrame = nullptr;
+  nsRect relativeBoundsRect = RelativeBounds(&boundingFrame);
+  if (MOZ_UNLIKELY(!boundingFrame)) {
+    // Area is not attached to an image map?
+    return nsRect();
+  }
+
+  // The relative bounds returned above are relative to this area's
+  // image map, which is technically already "parent relative".
+  // Because area elements are `display:none` to layout, they can't
+  // have transforms or other styling applied directly, and so we
+  // don't apply any additional transforms here. Any transform
+  // at the image map layer will be taken care of when computing bounds
+  // in the parent process.
+  return relativeBoundsRect;
+}