1 files changed, 221 insertions, 0 deletions
diff --git a/accessible/xul/XULElementAccessibles.cpp b/accessible/xul/XULElementAccessibles.cpp
new file mode 100644
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--- /dev/null
+++ b/accessible/xul/XULElementAccessibles.cpp
@@ -0,0 +1,221 @@
+/* -*- 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 "XULElementAccessibles.h"
+
+#include "LocalAccessible-inl.h"
+#include "BaseAccessibles.h"
+#include "DocAccessible-inl.h"
+#include "nsAccUtils.h"
+#include "nsCoreUtils.h"
+#include "nsTextEquivUtils.h"
+#include "Relation.h"
+#include "Role.h"
+#include "States.h"
+#include "TextUpdater.h"
+
+#ifdef A11Y_LOG
+#  include "Logging.h"
+#endif
+
+#include "nsNameSpaceManager.h"
+#include "nsNetUtil.h"
+#include "nsString.h"
+#include "nsTextBoxFrame.h"
+#include "nsXULElement.h"
+
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// XULLabelAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+XULLabelAccessible::XULLabelAccessible(nsIContent* aContent,
+                                       DocAccessible* aDoc)
+    : HyperTextAccessibleWrap(aContent, aDoc) {
+  mType = eXULLabelType;
+
+  // If @value attribute is given then it's rendered instead text content. In
+  // this case we need to create a text leaf accessible to make @value attribute
+  // accessible.
+  // XXX: text interface doesn't let you get the text by words.
+  nsTextBoxFrame* textBoxFrame = do_QueryFrame(mContent->GetPrimaryFrame());
+  if (textBoxFrame) {
+    mValueTextLeaf = new XULLabelTextLeafAccessible(mContent, mDoc);
+    mDoc->BindToDocument(mValueTextLeaf, nullptr);
+
+    nsAutoString text;
+    textBoxFrame->GetCroppedTitle(text);
+    mValueTextLeaf->SetText(text);
+    AppendChild(mValueTextLeaf);
+  }
+}
+
+void XULLabelAccessible::Shutdown() {
+  mValueTextLeaf = nullptr;
+  HyperTextAccessibleWrap::Shutdown();
+}
+
+void XULLabelAccessible::DispatchClickEvent(nsIContent* aContent,
+                                            uint32_t aActionIndex) const {
+  // Bug 1578140: For labels inside buttons, The base implementation of
+  // DispatchClickEvent doesn't fire a command event on the button.
+  RefPtr<nsXULElement> el = nsXULElement::FromNodeOrNull(aContent);
+  if (el) {
+    el->Click(mozilla::dom::CallerType::System);
+  }
+}
+
+ENameValueFlag XULLabelAccessible::NativeName(nsString& aName) const {
+  // if the value attr doesn't exist, the screen reader must get the accessible
+  // text from the accessible text interface or from the children
+  if (mValueTextLeaf) return mValueTextLeaf->Name(aName);
+
+  return LocalAccessible::NativeName(aName);
+}
+
+role XULLabelAccessible::NativeRole() const { return roles::LABEL; }
+
+uint64_t XULLabelAccessible::NativeState() const {
+  // Labels and description have read only state
+  // They are not focusable or selectable
+  return HyperTextAccessibleWrap::NativeState() | states::READONLY;
+}
+
+Relation XULLabelAccessible::RelationByType(RelationType aType) const {
+  Relation rel = HyperTextAccessibleWrap::RelationByType(aType);
+
+  // The label for xul:groupbox is generated from the first xul:label
+  if (aType == RelationType::LABEL_FOR) {
+    LocalAccessible* parent = LocalParent();
+    if (parent && parent->Role() == roles::GROUPING &&
+        parent->LocalChildAt(0) == this) {
+      nsIContent* parentContent = parent->GetContent();
+      if (parentContent && parentContent->IsXULElement(nsGkAtoms::groupbox)) {
+        rel.AppendTarget(parent);
+      }
+    }
+  }
+
+  return rel;
+}
+
+void XULLabelAccessible::UpdateLabelValue(const nsString& aValue) {
+#ifdef A11Y_LOG
+  if (logging::IsEnabled(logging::eText)) {
+    logging::MsgBegin("TEXT", "text may be changed (xul:label @value update)");
+    logging::Node("container", mContent);
+    logging::MsgEntry("old text '%s'",
+                      NS_ConvertUTF16toUTF8(mValueTextLeaf->Text()).get());
+    logging::MsgEntry("new text: '%s'", NS_ConvertUTF16toUTF8(aValue).get());
+    logging::MsgEnd();
+  }
+#endif
+
+  TextUpdater::Run(mDoc, mValueTextLeaf, aValue);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// XULLabelTextLeafAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+role XULLabelTextLeafAccessible::NativeRole() const { return roles::TEXT_LEAF; }
+
+uint64_t XULLabelTextLeafAccessible::NativeState() const {
+  return TextLeafAccessible::NativeState() | states::READONLY;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// XULTooltipAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+XULTooltipAccessible::XULTooltipAccessible(nsIContent* aContent,
+                                           DocAccessible* aDoc)
+    : LeafAccessible(aContent, aDoc) {
+  mType = eXULTooltipType;
+}
+
+uint64_t XULTooltipAccessible::NativeState() const {
+  return LeafAccessible::NativeState() | states::READONLY;
+}
+
+role XULTooltipAccessible::NativeRole() const { return roles::TOOLTIP; }
+
+////////////////////////////////////////////////////////////////////////////////
+// XULLinkAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+XULLinkAccessible::XULLinkAccessible(nsIContent* aContent, DocAccessible* aDoc)
+    : XULLabelAccessible(aContent, aDoc) {}
+
+XULLinkAccessible::~XULLinkAccessible() {}
+
+////////////////////////////////////////////////////////////////////////////////
+// XULLinkAccessible: LocalAccessible
+
+void XULLinkAccessible::Value(nsString& aValue) const {
+  aValue.Truncate();
+
+  mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::href, aValue);
+}
+
+ENameValueFlag XULLinkAccessible::NativeName(nsString& aName) const {
+  mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::value, aName);
+  if (!aName.IsEmpty()) return eNameOK;
+
+  nsTextEquivUtils::GetNameFromSubtree(this, aName);
+  return aName.IsEmpty() ? eNameOK : eNameFromSubtree;
+}
+
+role XULLinkAccessible::NativeRole() const { return roles::LINK; }
+
+uint64_t XULLinkAccessible::NativeLinkState() const { return states::LINKED; }
+
+bool XULLinkAccessible::HasPrimaryAction() const { return true; }
+
+void XULLinkAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName) {
+  aName.Truncate();
+
+  if (aIndex == eAction_Jump) aName.AssignLiteral("jump");
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// XULLinkAccessible: HyperLinkAccessible
+
+bool XULLinkAccessible::IsLink() const {
+  // Expose HyperLinkAccessible unconditionally.
+  return true;
+}
+
+uint32_t XULLinkAccessible::StartOffset() {
+  // If XUL link accessible is not contained by hypertext accessible then
+  // start offset matches index in parent because the parent doesn't contains
+  // a text.
+  // XXX: accessible parent of XUL link accessible should be a hypertext
+  // accessible.
+  if (LocalAccessible::IsLink()) return LocalAccessible::StartOffset();
+  return IndexInParent();
+}
+
+uint32_t XULLinkAccessible::EndOffset() {
+  if (LocalAccessible::IsLink()) return LocalAccessible::EndOffset();
+  return IndexInParent() + 1;
+}
+
+already_AddRefed<nsIURI> XULLinkAccessible::AnchorURIAt(
+    uint32_t aAnchorIndex) const {
+  if (aAnchorIndex != 0) return nullptr;
+
+  nsAutoString href;
+  mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::href, href);
+
+  dom::Document* document = mContent->OwnerDoc();
+
+  nsCOMPtr<nsIURI> anchorURI;
+  NS_NewURI(getter_AddRefs(anchorURI), href,
+            document->GetDocumentCharacterSet(), mContent->GetBaseURI());
+
+  return anchorURI.forget();
+}