зеркало из https://github.com/mozilla/gecko-dev.git
646 строки
16 KiB
C++
646 строки
16 KiB
C++
/* -*- Mode: C++; tab-width: 2; 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 "XULFormControlAccessible.h"
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#include "Accessible-inl.h"
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#include "HTMLFormControlAccessible.h"
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#include "nsAccUtils.h"
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#include "nsCoreUtils.h"
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#include "DocAccessible.h"
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#include "nsIAccessibleRelation.h"
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#include "Relation.h"
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#include "Role.h"
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#include "States.h"
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#include "TreeWalker.h"
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#include "XULMenuAccessible.h"
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#include "nsIDOMNSEditableElement.h"
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#include "nsIDOMXULButtonElement.h"
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#include "nsIDOMXULCheckboxElement.h"
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#include "nsIDOMXULMenuListElement.h"
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#include "nsIDOMXULSelectCntrlItemEl.h"
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#include "nsIDOMXULTextboxElement.h"
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#include "nsIEditor.h"
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#include "nsIFrame.h"
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#include "nsITextControlFrame.h"
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#include "nsMenuPopupFrame.h"
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#include "nsNameSpaceManager.h"
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#include "mozilla/dom/Element.h"
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using namespace mozilla::a11y;
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////////////////////////////////////////////////////////////////////////////////
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// XULButtonAccessible
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////////////////////////////////////////////////////////////////////////////////
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XULButtonAccessible::
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XULButtonAccessible(nsIContent* aContent, DocAccessible* aDoc) :
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AccessibleWrap(aContent, aDoc)
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{
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if (ContainsMenu()) {
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mGenericTypes |= eMenuButton;
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} else {
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mGenericTypes |= eButton;
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}
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}
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XULButtonAccessible::~XULButtonAccessible()
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{
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULButtonAccessible: nsISupports
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NS_IMPL_ISUPPORTS_INHERITED0(XULButtonAccessible, Accessible)
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////////////////////////////////////////////////////////////////////////////////
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// XULButtonAccessible: nsIAccessible
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uint8_t
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XULButtonAccessible::ActionCount()
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{
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return 1;
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}
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NS_IMETHODIMP
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XULButtonAccessible::GetActionName(uint8_t aIndex, nsAString& aName)
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{
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if (aIndex == eAction_Click) {
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aName.AssignLiteral("press");
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return NS_OK;
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}
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return NS_ERROR_INVALID_ARG;
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}
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NS_IMETHODIMP
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XULButtonAccessible::DoAction(uint8_t aIndex)
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{
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if (aIndex != 0)
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return NS_ERROR_INVALID_ARG;
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DoCommand();
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return NS_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULButtonAccessible: Accessible
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role
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XULButtonAccessible::NativeRole()
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{
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return roles::PUSHBUTTON;
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}
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uint64_t
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XULButtonAccessible::NativeState()
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{
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// Possible states: focused, focusable, unavailable(disabled).
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// get focus and disable status from base class
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uint64_t state = Accessible::NativeState();
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// Buttons can be checked -- they simply appear pressed in rather than checked
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nsCOMPtr<nsIDOMXULButtonElement> xulButtonElement(do_QueryInterface(mContent));
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if (xulButtonElement) {
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nsAutoString type;
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xulButtonElement->GetType(type);
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if (type.EqualsLiteral("checkbox") || type.EqualsLiteral("radio")) {
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state |= states::CHECKABLE;
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bool checked = false;
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int32_t checkState = 0;
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xulButtonElement->GetChecked(&checked);
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if (checked) {
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state |= states::PRESSED;
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xulButtonElement->GetCheckState(&checkState);
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if (checkState == nsIDOMXULButtonElement::CHECKSTATE_MIXED) {
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state |= states::MIXED;
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}
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}
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}
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}
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if (ContainsMenu())
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state |= states::HASPOPUP;
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if (mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::_default))
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state |= states::DEFAULT;
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return state;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULButtonAccessible: Widgets
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bool
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XULButtonAccessible::IsWidget() const
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{
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return true;
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}
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bool
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XULButtonAccessible::IsActiveWidget() const
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{
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return FocusMgr()->HasDOMFocus(mContent);
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}
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bool
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XULButtonAccessible::AreItemsOperable() const
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{
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if (IsMenuButton()) {
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Accessible* menuPopup = mChildren.SafeElementAt(0, nullptr);
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if (menuPopup) {
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nsMenuPopupFrame* menuPopupFrame = do_QueryFrame(menuPopup->GetFrame());
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return menuPopupFrame->IsOpen();
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}
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}
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return false; // no items
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}
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Accessible*
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XULButtonAccessible::ContainerWidget() const
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{
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if (IsMenuButton() && mParent && mParent->IsAutoComplete())
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return mParent;
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return nullptr;
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}
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bool
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XULButtonAccessible::IsAcceptableChild(Accessible* aPossibleChild) const
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{
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// In general XUL button has not accessible children. Nevertheless menu
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// buttons can have button (@type="menu-button") and popup accessibles
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// (@type="menu-button", @type="menu" or columnpicker.
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// XXX: no children until the button is menu button. Probably it's not
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// totally correct but in general AT wants to have leaf buttons.
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roles::Role role = aPossibleChild->Role();
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// Get an accessible for menupopup or panel elements.
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if (role == roles::MENUPOPUP)
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return true;
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// Button type="menu-button" contains a real button. Get an accessible
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// for it. Ignore dropmarker button which is placed as a last child.
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if (role != roles::PUSHBUTTON ||
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aPossibleChild->GetContent()->Tag() == nsGkAtoms::dropMarker)
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return false;
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return mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
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nsGkAtoms::menuButton, eCaseMatters);
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULButtonAccessible protected
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bool
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XULButtonAccessible::ContainsMenu()
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{
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static nsIContent::AttrValuesArray strings[] =
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{&nsGkAtoms::menu, &nsGkAtoms::menuButton, nullptr};
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return mContent->FindAttrValueIn(kNameSpaceID_None,
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nsGkAtoms::type,
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strings, eCaseMatters) >= 0;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULDropmarkerAccessible
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////////////////////////////////////////////////////////////////////////////////
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XULDropmarkerAccessible::
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XULDropmarkerAccessible(nsIContent* aContent, DocAccessible* aDoc) :
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LeafAccessible(aContent, aDoc)
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{
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}
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uint8_t
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XULDropmarkerAccessible::ActionCount()
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{
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return 1;
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}
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bool
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XULDropmarkerAccessible::DropmarkerOpen(bool aToggleOpen)
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{
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bool isOpen = false;
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nsCOMPtr<nsIDOMXULButtonElement> parentButtonElement =
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do_QueryInterface(mContent->GetFlattenedTreeParent());
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if (parentButtonElement) {
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parentButtonElement->GetOpen(&isOpen);
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if (aToggleOpen)
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parentButtonElement->SetOpen(!isOpen);
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}
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else {
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nsCOMPtr<nsIDOMXULMenuListElement> parentMenuListElement =
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do_QueryInterface(parentButtonElement);
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if (parentMenuListElement) {
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parentMenuListElement->GetOpen(&isOpen);
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if (aToggleOpen)
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parentMenuListElement->SetOpen(!isOpen);
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}
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}
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return isOpen;
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}
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/**
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* Return the name of our only action
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*/
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NS_IMETHODIMP
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XULDropmarkerAccessible::GetActionName(uint8_t aIndex, nsAString& aName)
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{
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if (aIndex == eAction_Click) {
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if (DropmarkerOpen(false))
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aName.AssignLiteral("close");
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else
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aName.AssignLiteral("open");
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return NS_OK;
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}
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return NS_ERROR_INVALID_ARG;
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}
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/**
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* Tell the Dropmarker to do its action
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*/
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NS_IMETHODIMP
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XULDropmarkerAccessible::DoAction(uint8_t index)
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{
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if (index == eAction_Click) {
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DropmarkerOpen(true); // Reverse the open attribute
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return NS_OK;
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}
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return NS_ERROR_INVALID_ARG;
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}
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role
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XULDropmarkerAccessible::NativeRole()
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{
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return roles::PUSHBUTTON;
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}
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uint64_t
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XULDropmarkerAccessible::NativeState()
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{
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return DropmarkerOpen(false) ? states::PRESSED : 0;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULCheckboxAccessible
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////////////////////////////////////////////////////////////////////////////////
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XULCheckboxAccessible::
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XULCheckboxAccessible(nsIContent* aContent, DocAccessible* aDoc) :
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LeafAccessible(aContent, aDoc)
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{
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}
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role
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XULCheckboxAccessible::NativeRole()
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{
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return roles::CHECKBUTTON;
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}
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uint8_t
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XULCheckboxAccessible::ActionCount()
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{
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return 1;
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}
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/**
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* Return the name of our only action
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*/
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NS_IMETHODIMP
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XULCheckboxAccessible::GetActionName(uint8_t aIndex, nsAString& aName)
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{
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if (aIndex == eAction_Click) {
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// check or uncheck
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if (NativeState() & states::CHECKED)
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aName.AssignLiteral("uncheck");
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else
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aName.AssignLiteral("check");
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return NS_OK;
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}
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return NS_ERROR_INVALID_ARG;
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}
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/**
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* Tell the checkbox to do its only action -- check( or uncheck) itself
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*/
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NS_IMETHODIMP
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XULCheckboxAccessible::DoAction(uint8_t aIndex)
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{
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if (aIndex != eAction_Click)
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return NS_ERROR_INVALID_ARG;
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DoCommand();
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return NS_OK;
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}
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uint64_t
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XULCheckboxAccessible::NativeState()
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{
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// Possible states: focused, focusable, unavailable(disabled), checked
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// Get focus and disable status from base class
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uint64_t state = LeafAccessible::NativeState();
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state |= states::CHECKABLE;
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// Determine Checked state
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nsCOMPtr<nsIDOMXULCheckboxElement> xulCheckboxElement =
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do_QueryInterface(mContent);
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if (xulCheckboxElement) {
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bool checked = false;
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xulCheckboxElement->GetChecked(&checked);
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if (checked) {
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state |= states::CHECKED;
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int32_t checkState = 0;
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xulCheckboxElement->GetCheckState(&checkState);
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if (checkState == nsIDOMXULCheckboxElement::CHECKSTATE_MIXED)
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state |= states::MIXED;
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}
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}
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return state;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULGroupboxAccessible
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////////////////////////////////////////////////////////////////////////////////
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XULGroupboxAccessible::
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XULGroupboxAccessible(nsIContent* aContent, DocAccessible* aDoc) :
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AccessibleWrap(aContent, aDoc)
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{
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}
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role
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XULGroupboxAccessible::NativeRole()
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{
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return roles::GROUPING;
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}
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ENameValueFlag
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XULGroupboxAccessible::NativeName(nsString& aName)
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{
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// XXX: we use the first related accessible only.
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Accessible* label =
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RelationByType(RelationType::LABELLED_BY).Next();
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if (label)
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return label->Name(aName);
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return eNameOK;
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}
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Relation
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XULGroupboxAccessible::RelationByType(RelationType aType)
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{
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Relation rel = AccessibleWrap::RelationByType(aType);
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if (aType != RelationType::LABELLED_BY)
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return rel;
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// The label for xul:groupbox is generated from xul:label that is
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// inside the anonymous content of the xul:caption.
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// The xul:label has an accessible object but the xul:caption does not
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uint32_t childCount = ChildCount();
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for (uint32_t childIdx = 0; childIdx < childCount; childIdx++) {
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Accessible* childAcc = GetChildAt(childIdx);
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if (childAcc->Role() == roles::LABEL) {
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// Ensure that it's our label
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Relation reverseRel = childAcc->RelationByType(RelationType::LABEL_FOR);
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Accessible* testGroupbox = nullptr;
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while ((testGroupbox = reverseRel.Next()))
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if (testGroupbox == this) {
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// The <label> points back to this groupbox
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rel.AppendTarget(childAcc);
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}
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}
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}
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return rel;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULRadioButtonAccessible
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////////////////////////////////////////////////////////////////////////////////
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XULRadioButtonAccessible::
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XULRadioButtonAccessible(nsIContent* aContent, DocAccessible* aDoc) :
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RadioButtonAccessible(aContent, aDoc)
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{
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}
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uint64_t
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XULRadioButtonAccessible::NativeState()
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{
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uint64_t state = LeafAccessible::NativeState();
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state |= states::CHECKABLE;
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nsCOMPtr<nsIDOMXULSelectControlItemElement> radioButton =
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do_QueryInterface(mContent);
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if (radioButton) {
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bool selected = false; // Radio buttons can be selected
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radioButton->GetSelected(&selected);
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if (selected) {
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state |= states::CHECKED;
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}
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}
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return state;
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}
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uint64_t
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XULRadioButtonAccessible::NativeInteractiveState() const
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{
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return NativelyUnavailable() ? states::UNAVAILABLE : states::FOCUSABLE;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULRadioButtonAccessible: Widgets
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Accessible*
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XULRadioButtonAccessible::ContainerWidget() const
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{
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return mParent;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULRadioGroupAccessible
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////////////////////////////////////////////////////////////////////////////////
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/**
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* XUL Radio Group
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* The Radio Group proxies for the Radio Buttons themselves. The Group gets
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* focus whereas the Buttons do not. So we only have an accessible object for
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* this for the purpose of getting the proper RadioButton. Need this here to
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* avoid circular reference problems when navigating the accessible tree and
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* for getting to the radiobuttons.
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*/
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XULRadioGroupAccessible::
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XULRadioGroupAccessible(nsIContent* aContent, DocAccessible* aDoc) :
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XULSelectControlAccessible(aContent, aDoc)
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{
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}
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role
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XULRadioGroupAccessible::NativeRole()
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{
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return roles::GROUPING;
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}
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uint64_t
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XULRadioGroupAccessible::NativeInteractiveState() const
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{
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// The radio group is not focusable. Sometimes the focus controller will
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// report that it is focused. That means that the actual selected radio button
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// should be considered focused.
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return NativelyUnavailable() ? states::UNAVAILABLE : 0;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULRadioGroupAccessible: Widgets
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bool
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XULRadioGroupAccessible::IsWidget() const
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{
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return true;
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}
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bool
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XULRadioGroupAccessible::IsActiveWidget() const
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{
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return FocusMgr()->HasDOMFocus(mContent);
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}
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bool
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XULRadioGroupAccessible::AreItemsOperable() const
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{
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULStatusBarAccessible
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////////////////////////////////////////////////////////////////////////////////
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XULStatusBarAccessible::
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XULStatusBarAccessible(nsIContent* aContent, DocAccessible* aDoc) :
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AccessibleWrap(aContent, aDoc)
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{
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}
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role
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XULStatusBarAccessible::NativeRole()
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{
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return roles::STATUSBAR;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULToolbarButtonAccessible
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////////////////////////////////////////////////////////////////////////////////
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XULToolbarButtonAccessible::
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XULToolbarButtonAccessible(nsIContent* aContent, DocAccessible* aDoc) :
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XULButtonAccessible(aContent, aDoc)
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{
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}
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void
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XULToolbarButtonAccessible::GetPositionAndSizeInternal(int32_t* aPosInSet,
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int32_t* aSetSize)
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{
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int32_t setSize = 0;
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int32_t posInSet = 0;
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Accessible* parent = Parent();
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if (!parent)
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return;
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uint32_t childCount = parent->ChildCount();
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for (uint32_t childIdx = 0; childIdx < childCount; childIdx++) {
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Accessible* child = parent->GetChildAt(childIdx);
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if (IsSeparator(child)) { // end of a group of buttons
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if (posInSet)
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break; // we've found our group, so we're done
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setSize = 0; // not our group, so start a new group
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} else {
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setSize++; // another button in the group
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if (child == this)
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posInSet = setSize; // we've found our button
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}
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}
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*aPosInSet = posInSet;
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*aSetSize = setSize;
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}
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bool
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XULToolbarButtonAccessible::IsSeparator(Accessible* aAccessible)
|
|
{
|
|
nsIContent* content = aAccessible->GetContent();
|
|
return content && ((content->Tag() == nsGkAtoms::toolbarseparator) ||
|
|
(content->Tag() == nsGkAtoms::toolbarspacer) ||
|
|
(content->Tag() == nsGkAtoms::toolbarspring)); }
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// XULToolbarAccessible
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
XULToolbarAccessible::
|
|
XULToolbarAccessible(nsIContent* aContent, DocAccessible* aDoc) :
|
|
AccessibleWrap(aContent, aDoc)
|
|
{
|
|
}
|
|
|
|
role
|
|
XULToolbarAccessible::NativeRole()
|
|
{
|
|
return roles::TOOLBAR;
|
|
}
|
|
|
|
ENameValueFlag
|
|
XULToolbarAccessible::NativeName(nsString& aName)
|
|
{
|
|
if (mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::toolbarname, aName))
|
|
aName.CompressWhitespace();
|
|
|
|
return eNameOK;
|
|
}
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// XULToolbarAccessible
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
XULToolbarSeparatorAccessible::
|
|
XULToolbarSeparatorAccessible(nsIContent* aContent, DocAccessible* aDoc) :
|
|
LeafAccessible(aContent, aDoc)
|
|
{
|
|
}
|
|
|
|
role
|
|
XULToolbarSeparatorAccessible::NativeRole()
|
|
{
|
|
return roles::SEPARATOR;
|
|
}
|
|
|
|
uint64_t
|
|
XULToolbarSeparatorAccessible::NativeState()
|
|
{
|
|
return 0;
|
|
}
|