зеркало из https://github.com/mozilla/gecko-dev.git
139 строки
4.2 KiB
C++
139 строки
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "XULComboboxAccessible.h"
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#include "LocalAccessible-inl.h"
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#include "nsAccessibilityService.h"
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#include "DocAccessible.h"
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#include "nsCoreUtils.h"
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#include "Role.h"
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#include "States.h"
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#include "mozilla/dom/Element.h"
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#include "nsIDOMXULMenuListElement.h"
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using namespace mozilla::a11y;
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////////////////////////////////////////////////////////////////////////////////
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// XULComboboxAccessible
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////////////////////////////////////////////////////////////////////////////////
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XULComboboxAccessible::XULComboboxAccessible(nsIContent* aContent,
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DocAccessible* aDoc)
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: AccessibleWrap(aContent, aDoc) {
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mGenericTypes |= eCombobox;
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}
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role XULComboboxAccessible::NativeRole() const { return roles::COMBOBOX; }
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uint64_t XULComboboxAccessible::NativeState() const {
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// As a nsComboboxAccessible we can have the following states:
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// STATE_FOCUSED
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// STATE_FOCUSABLE
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// STATE_HASPOPUP
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// STATE_EXPANDED
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// STATE_COLLAPSED
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// Get focus status from base class
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uint64_t state = LocalAccessible::NativeState();
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nsCOMPtr<nsIDOMXULMenuListElement> menuList = Elm()->AsXULMenuList();
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if (menuList) {
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bool isOpen = false;
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menuList->GetOpen(&isOpen);
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if (isOpen) {
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state |= states::EXPANDED;
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} else {
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state |= states::COLLAPSED;
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}
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}
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return state | states::HASPOPUP;
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}
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void XULComboboxAccessible::Description(nsString& aDescription) const {
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aDescription.Truncate();
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// Use description of currently focused option
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nsCOMPtr<nsIDOMXULMenuListElement> menuListElm = Elm()->AsXULMenuList();
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if (!menuListElm) return;
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nsCOMPtr<dom::Element> focusedOptionItem;
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menuListElm->GetSelectedItem(getter_AddRefs(focusedOptionItem));
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if (focusedOptionItem && mDoc) {
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LocalAccessible* focusedOptionAcc = mDoc->GetAccessible(focusedOptionItem);
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if (focusedOptionAcc) focusedOptionAcc->Description(aDescription);
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}
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}
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void XULComboboxAccessible::Value(nsString& aValue) const {
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aValue.Truncate();
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// The value is the option or text shown entered in the combobox.
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nsCOMPtr<nsIDOMXULMenuListElement> menuList = Elm()->AsXULMenuList();
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if (menuList) menuList->GetLabel(aValue);
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}
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bool XULComboboxAccessible::HasPrimaryAction() const { return true; }
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bool XULComboboxAccessible::DoAction(uint8_t aIndex) const {
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if (aIndex != XULComboboxAccessible::eAction_Click) return false;
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// Programmaticaly toggle the combo box.
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nsCOMPtr<nsIDOMXULMenuListElement> menuList = Elm()->AsXULMenuList();
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if (!menuList) return false;
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bool isDroppedDown = false;
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menuList->GetOpen(&isDroppedDown);
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menuList->SetOpen(!isDroppedDown);
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return true;
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}
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void XULComboboxAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName) {
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aName.Truncate();
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if (aIndex != XULComboboxAccessible::eAction_Click) return;
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nsCOMPtr<nsIDOMXULMenuListElement> menuList = Elm()->AsXULMenuList();
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if (!menuList) return;
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bool isDroppedDown = false;
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menuList->GetOpen(&isDroppedDown);
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if (isDroppedDown) {
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aName.AssignLiteral("close");
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} else {
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aName.AssignLiteral("open");
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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// Widgets
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bool XULComboboxAccessible::IsActiveWidget() const {
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if (mContent->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::editable,
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nsGkAtoms::_true, eIgnoreCase)) {
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int32_t childCount = mChildren.Length();
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for (int32_t idx = 0; idx < childCount; idx++) {
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LocalAccessible* child = mChildren[idx];
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if (child->Role() == roles::ENTRY) {
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return FocusMgr()->HasDOMFocus(child->GetContent());
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}
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}
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return false;
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}
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return FocusMgr()->HasDOMFocus(mContent);
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}
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bool XULComboboxAccessible::AreItemsOperable() const {
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nsCOMPtr<nsIDOMXULMenuListElement> menuListElm = Elm()->AsXULMenuList();
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if (menuListElm) {
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bool isOpen = false;
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menuListElm->GetOpen(&isOpen);
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return isOpen;
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}
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return false;
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}
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