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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /accessible/generic/ImageAccessible.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'accessible/generic/ImageAccessible.cpp')
-rw-r--r--accessible/generic/ImageAccessible.cpp224
1 files changed, 224 insertions, 0 deletions
diff --git a/accessible/generic/ImageAccessible.cpp b/accessible/generic/ImageAccessible.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 "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();
+}
+