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-rw-r--r--accessible/xul/XULComboboxAccessible.cpp142
1 files changed, 142 insertions, 0 deletions
diff --git a/accessible/xul/XULComboboxAccessible.cpp b/accessible/xul/XULComboboxAccessible.cpp
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+++ b/accessible/xul/XULComboboxAccessible.cpp
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+/* -*- Mode: C++; tab-width: 4; 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 "XULComboboxAccessible.h"
+
+#include "LocalAccessible-inl.h"
+#include "nsAccessibilityService.h"
+#include "DocAccessible.h"
+#include "nsCoreUtils.h"
+#include "Role.h"
+#include "States.h"
+
+#include "mozilla/dom/Element.h"
+#include "nsIDOMXULMenuListElement.h"
+
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// XULComboboxAccessible
+////////////////////////////////////////////////////////////////////////////////
+
+XULComboboxAccessible::XULComboboxAccessible(nsIContent* aContent,
+ DocAccessible* aDoc)
+ : AccessibleWrap(aContent, aDoc) {
+ mGenericTypes |= eCombobox;
+}
+
+role XULComboboxAccessible::NativeRole() const { return roles::COMBOBOX; }
+
+uint64_t XULComboboxAccessible::NativeState() const {
+ // As a nsComboboxAccessible we can have the following states:
+ // STATE_FOCUSED
+ // STATE_FOCUSABLE
+ // STATE_HASPOPUP
+ // STATE_EXPANDED
+ // STATE_COLLAPSED
+
+ // Get focus status from base class
+ uint64_t state = LocalAccessible::NativeState();
+
+ nsCOMPtr<nsIDOMXULMenuListElement> menuList = Elm()->AsXULMenuList();
+ if (menuList) {
+ bool isOpen = false;
+ menuList->GetOpen(&isOpen);
+ if (isOpen) {
+ state |= states::EXPANDED;
+ } else {
+ state |= states::COLLAPSED;
+ }
+ }
+
+ return state | states::HASPOPUP;
+}
+
+bool XULComboboxAccessible::IsAcceptableChild(nsIContent* aContent) const {
+ return AccessibleWrap::IsAcceptableChild(aContent) && !aContent->IsText();
+}
+
+void XULComboboxAccessible::Description(nsString& aDescription) const {
+ aDescription.Truncate();
+ // Use description of currently focused option
+ nsCOMPtr<nsIDOMXULMenuListElement> menuListElm = Elm()->AsXULMenuList();
+ if (!menuListElm) return;
+
+ nsCOMPtr<dom::Element> focusedOptionItem;
+ menuListElm->GetSelectedItem(getter_AddRefs(focusedOptionItem));
+ if (focusedOptionItem && mDoc) {
+ LocalAccessible* focusedOptionAcc = mDoc->GetAccessible(focusedOptionItem);
+ if (focusedOptionAcc) focusedOptionAcc->Description(aDescription);
+ }
+}
+
+void XULComboboxAccessible::Value(nsString& aValue) const {
+ aValue.Truncate();
+
+ // The value is the option or text shown entered in the combobox.
+ nsCOMPtr<nsIDOMXULMenuListElement> menuList = Elm()->AsXULMenuList();
+ if (menuList) menuList->GetLabel(aValue);
+}
+
+bool XULComboboxAccessible::HasPrimaryAction() const { return true; }
+
+bool XULComboboxAccessible::DoAction(uint8_t aIndex) const {
+ if (aIndex != XULComboboxAccessible::eAction_Click) return false;
+
+ // Programmaticaly toggle the combo box.
+ nsCOMPtr<nsIDOMXULMenuListElement> menuList = Elm()->AsXULMenuList();
+ if (!menuList) return false;
+
+ bool isDroppedDown = false;
+ menuList->GetOpen(&isDroppedDown);
+ menuList->SetOpen(!isDroppedDown);
+ return true;
+}
+
+void XULComboboxAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName) {
+ aName.Truncate();
+ if (aIndex != XULComboboxAccessible::eAction_Click) return;
+
+ nsCOMPtr<nsIDOMXULMenuListElement> menuList = Elm()->AsXULMenuList();
+ if (!menuList) return;
+
+ bool isDroppedDown = false;
+ menuList->GetOpen(&isDroppedDown);
+ if (isDroppedDown) {
+ aName.AssignLiteral("close");
+ } else {
+ aName.AssignLiteral("open");
+ }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Widgets
+
+bool XULComboboxAccessible::IsActiveWidget() const {
+ if (mContent->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::editable,
+ nsGkAtoms::_true, eIgnoreCase)) {
+ int32_t childCount = mChildren.Length();
+ for (int32_t idx = 0; idx < childCount; idx++) {
+ LocalAccessible* child = mChildren[idx];
+ if (child->Role() == roles::ENTRY) {
+ return FocusMgr()->HasDOMFocus(child->GetContent());
+ }
+ }
+ return false;
+ }
+
+ return FocusMgr()->HasDOMFocus(mContent);
+}
+
+bool XULComboboxAccessible::AreItemsOperable() const {
+ nsCOMPtr<nsIDOMXULMenuListElement> menuListElm = Elm()->AsXULMenuList();
+ if (menuListElm) {
+ bool isOpen = false;
+ menuListElm->GetOpen(&isOpen);
+ return isOpen;
+ }
+
+ return false;
+}