import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

2026-09-06 15:58:39 +09:00 · 2018-01-19 03:59:58 +08:00 · 2018-01-19 03:59:58 +08:00 · dcd9973243
commit dcd9973243
150858 changed files with 23884658 additions and 0 deletions
--- a/accessible/generic/ImageAccessible.cpp
+++ b/accessible/generic/ImageAccessible.cpp
@ -0,0 +1,224 @@
+/* -*- 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 "ImageAccessible.h"
+
+#include "nsAccUtils.h"
+#include "Role.h"
+#include "AccIterator.h"
+#include "States.h"
+
+#include "imgIContainer.h"
+#include "imgIRequest.h"
+#include "nsGenericHTMLElement.h"
+#include "nsIDocument.h"
+#include "nsIImageLoadingContent.h"
+#include "nsIPresShell.h"
+#include "nsIServiceManager.h"
+#include "nsIDOMHTMLImageElement.h"
+#include "nsIPersistentProperties2.h"
+#include "nsPIDOMWindow.h"
+#include "nsIURI.h"
+
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// ImageAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+ImageAccessible::
+  ImageAccessible(nsIContent* aContent, DocAccessible* aDoc) :
+  LinkableAccessible(aContent, aDoc)
+{
+  mType = eImageType;
+}
+
+ImageAccessible::~ImageAccessible()
+{
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Accessible public
+
+uint64_t
+ImageAccessible::NativeState()
+{
+  // The state is a bitfield, get our inherited state, then logically OR it with
+  // states::ANIMATED if this is an animated image.
+
+  uint64_t state = LinkableAccessible::NativeState();
+
+  nsCOMPtr<nsIImageLoadingContent> content(do_QueryInterface(mContent));
+  nsCOMPtr<imgIRequest> imageRequest;
+
+  if (content)
+    content->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
+                        getter_AddRefs(imageRequest));
+
+  nsCOMPtr<imgIContainer> imgContainer;
+  if (imageRequest)
+    imageRequest->GetImage(getter_AddRefs(imgContainer));
+
+  if (imgContainer) {
+    bool animated;
+    imgContainer->GetAnimated(&animated);
+    if (animated)
+      state |= states::ANIMATED;
+  }
+
+  return state;
+}
+
+ENameValueFlag
+ImageAccessible::NativeName(nsString& aName)
+{
+  bool hasAltAttrib =
+    mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::alt, aName);
+  if (!aName.IsEmpty())
+    return eNameOK;
+
+  ENameValueFlag nameFlag = Accessible::NativeName(aName);
+  if (!aName.IsEmpty())
+    return nameFlag;
+
+  // No accessible name but empty 'alt' attribute is present. If further name
+  // computation algorithm doesn't provide non empty name then it means
+  // an empty 'alt' attribute was used to indicate a decorative image (see
+  // Accessible::Name() method for details).
+  return hasAltAttrib ? eNoNameOnPurpose : eNameOK;
+}
+
+role
+ImageAccessible::NativeRole()
+{
+  return roles::GRAPHIC;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Accessible
+
+uint8_t
+ImageAccessible::ActionCount()
+{
+  uint8_t actionCount = LinkableAccessible::ActionCount();
+  return HasLongDesc() ? actionCount + 1 : actionCount;
+}
+
+void
+ImageAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName)
+{
+  aName.Truncate();
+  if (IsLongDescIndex(aIndex) && HasLongDesc())
+    aName.AssignLiteral("showlongdesc"); 
+  else
+    LinkableAccessible::ActionNameAt(aIndex, aName);
+}
+
+bool
+ImageAccessible::DoAction(uint8_t aIndex)
+{
+  // Get the long description uri and open in a new window.
+  if (!IsLongDescIndex(aIndex))
+    return LinkableAccessible::DoAction(aIndex);
+
+  nsCOMPtr<nsIURI> uri = GetLongDescURI();
+  if (!uri)
+    return false;
+
+  nsAutoCString utf8spec;
+  uri->GetSpec(utf8spec);
+  NS_ConvertUTF8toUTF16 spec(utf8spec);
+
+  nsIDocument* document = mContent->OwnerDoc();
+  nsCOMPtr<nsPIDOMWindowOuter> piWindow = document->GetWindow();
+  if (!piWindow)
+    return false;
+
+  nsCOMPtr<nsPIDOMWindowOuter> tmp;
+  return NS_SUCCEEDED(piWindow->Open(spec, EmptyString(), EmptyString(),
+                                     /* aLoadInfo = */ nullptr,
+                                     /* aForceNoOpener = */ false,
+                                     getter_AddRefs(tmp)));
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// ImageAccessible
+
+nsIntPoint
+ImageAccessible::Position(uint32_t aCoordType)
+{
+  nsIntRect rect = Bounds();
+  nsAccUtils::ConvertScreenCoordsTo(&rect.x, &rect.y, aCoordType, this);
+  return rect.TopLeft();
+}
+
+nsIntSize
+ImageAccessible::Size()
+{
+  return Bounds().Size();
+}
+
+// Accessible
+already_AddRefed<nsIPersistentProperties>
+ImageAccessible::NativeAttributes()
+{
+  nsCOMPtr<nsIPersistentProperties> attributes =
+    LinkableAccessible::NativeAttributes();
+
+  nsAutoString src;
+  mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::src, src);
+  if (!src.IsEmpty())
+    nsAccUtils::SetAccAttr(attributes, nsGkAtoms::src, src);
+
+  return attributes.forget();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Private methods
+
+already_AddRefed<nsIURI>
+ImageAccessible::GetLongDescURI() const
+{
+  if (mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::longdesc)) {
+    // To check if longdesc contains an invalid url.
+    nsAutoString longdesc;
+    mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::longdesc, longdesc);
+    if (longdesc.FindChar(' ') != -1 || longdesc.FindChar('\t') != -1 ||
+        longdesc.FindChar('\r') != -1 || longdesc.FindChar('\n') != -1) {
+      return nullptr;
+    }
+    nsCOMPtr<nsIURI> baseURI = mContent->GetBaseURI();
+    nsCOMPtr<nsIURI> uri;
+    nsContentUtils::NewURIWithDocumentCharset(getter_AddRefs(uri), longdesc,
+                                              mContent->OwnerDoc(), baseURI);
+    return uri.forget();
+  }
+
+  DocAccessible* document = Document();
+  if (document) {
+    IDRefsIterator iter(document, mContent, nsGkAtoms::aria_describedby);
+    while (nsIContent* target = iter.NextElem()) {
+      if ((target->IsHTMLElement(nsGkAtoms::a) ||
+           target->IsHTMLElement(nsGkAtoms::area)) &&
+          target->HasAttr(kNameSpaceID_None, nsGkAtoms::href)) {
+        nsGenericHTMLElement* element =
+          nsGenericHTMLElement::FromContent(target);
+
+        nsCOMPtr<nsIURI> uri;
+        element->GetURIAttr(nsGkAtoms::href, nullptr, getter_AddRefs(uri));
+        return uri.forget();
+      }
+    }
+  }
+
+  return nullptr;
+}
+
+bool
+ImageAccessible::IsLongDescIndex(uint8_t aIndex)
+{
+  return aIndex == LinkableAccessible::ActionCount();
+}
+