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tenfourfox/accessible/xul/XULMenuAccessible.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 "XULMenuAccessible.h"
#include "Accessible-inl.h"
#include "nsAccessibilityService.h"
#include "nsAccUtils.h"
#include "DocAccessible.h"
#include "Role.h"
#include "States.h"
#include "XULFormControlAccessible.h"
#include "nsIDOMElement.h"
#include "nsIDOMXULElement.h"
#include "nsIMutableArray.h"
#include "nsIDOMXULContainerElement.h"
#include "nsIDOMXULSelectCntrlItemEl.h"
#include "nsIDOMXULMultSelectCntrlEl.h"
#include "nsIDOMKeyEvent.h"
#include "nsIServiceManager.h"
#include "nsIPresShell.h"
#include "nsIContent.h"
#include "nsMenuBarFrame.h"
#include "nsMenuPopupFrame.h"
#include "mozilla/Preferences.h"
#include "mozilla/LookAndFeel.h"
#include "mozilla/dom/Element.h"
using namespace mozilla;
using namespace mozilla::a11y;
////////////////////////////////////////////////////////////////////////////////
// XULMenuitemAccessible
////////////////////////////////////////////////////////////////////////////////
XULMenuitemAccessible::
XULMenuitemAccessible(nsIContent* aContent, DocAccessible* aDoc) :
AccessibleWrap(aContent, aDoc)
{
}
uint64_t
XULMenuitemAccessible::NativeState()
{
uint64_t state = Accessible::NativeState();
// Has Popup?
if (mContent->NodeInfo()->Equals(nsGkAtoms::menu, kNameSpaceID_XUL)) {
state |= states::HASPOPUP;
if (mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::open))
state |= states::EXPANDED;
else
state |= states::COLLAPSED;
}
// Checkable/checked?
static nsIContent::AttrValuesArray strings[] =
{ &nsGkAtoms::radio, &nsGkAtoms::checkbox, nullptr };
if (mContent->FindAttrValueIn(kNameSpaceID_None, nsGkAtoms::type, strings,
eCaseMatters) >= 0) {
// Checkable?
state |= states::CHECKABLE;
// Checked?
if (mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::checked,
nsGkAtoms::_true, eCaseMatters))
state |= states::CHECKED;
}
// Combo box listitem
bool isComboboxOption = (Role() == roles::COMBOBOX_OPTION);
if (isComboboxOption) {
// Is selected?
bool isSelected = false;
nsCOMPtr<nsIDOMXULSelectControlItemElement>
item(do_QueryInterface(mContent));
NS_ENSURE_TRUE(item, state);
item->GetSelected(&isSelected);
// Is collapsed?
bool isCollapsed = false;
Accessible* parent = Parent();
if (parent && parent->State() & states::INVISIBLE)
isCollapsed = true;
if (isSelected) {
state |= states::SELECTED;
// Selected and collapsed?
if (isCollapsed) {
// Set selected option offscreen/invisible according to combobox state
Accessible* grandParent = parent->Parent();
if (!grandParent)
return state;
NS_ASSERTION(grandParent->Role() == roles::COMBOBOX,
"grandparent of combobox listitem is not combobox");
uint64_t grandParentState = grandParent->State();
state &= ~(states::OFFSCREEN | states::INVISIBLE);
state |= (grandParentState & states::OFFSCREEN) |
(grandParentState & states::INVISIBLE) |
(grandParentState & states::OPAQUE1);
} // isCollapsed
} // isSelected
} // ROLE_COMBOBOX_OPTION
return state;
}
uint64_t
XULMenuitemAccessible::NativeInteractiveState() const
{
if (NativelyUnavailable()) {
// Note: keep in sinc with nsXULPopupManager::IsValidMenuItem() logic.
bool skipNavigatingDisabledMenuItem = true;
nsMenuFrame* menuFrame = do_QueryFrame(GetFrame());
if (!menuFrame || !menuFrame->IsOnMenuBar()) {
skipNavigatingDisabledMenuItem = LookAndFeel::
GetInt(LookAndFeel::eIntID_SkipNavigatingDisabledMenuItem, 0) != 0;
}
if (skipNavigatingDisabledMenuItem)
return states::UNAVAILABLE;
return states::UNAVAILABLE | states::FOCUSABLE | states::SELECTABLE;
}
return states::FOCUSABLE | states::SELECTABLE;
}
ENameValueFlag
XULMenuitemAccessible::NativeName(nsString& aName)
{
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::label, aName);
return eNameOK;
}
void
XULMenuitemAccessible::Description(nsString& aDescription)
{
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::description,
aDescription);
}
KeyBinding
XULMenuitemAccessible::AccessKey() const
{
// Return menu accesskey: N or Alt+F.
static int32_t gMenuAccesskeyModifier = -1; // magic value of -1 indicates unitialized state
// We do not use nsCoreUtils::GetAccesskeyFor() because accesskeys for
// menu are't registered by EventStateManager.
nsAutoString accesskey;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::accesskey,
accesskey);
if (accesskey.IsEmpty())
return KeyBinding();
uint32_t modifierKey = 0;
Accessible* parentAcc = Parent();
if (parentAcc) {
if (parentAcc->NativeRole() == roles::MENUBAR) {
// If top level menu item, add Alt+ or whatever modifier text to string
// No need to cache pref service, this happens rarely
if (gMenuAccesskeyModifier == -1) {
// Need to initialize cached global accesskey pref
gMenuAccesskeyModifier = Preferences::GetInt("ui.key.menuAccessKey", 0);
}
switch (gMenuAccesskeyModifier) {
case nsIDOMKeyEvent::DOM_VK_CONTROL:
modifierKey = KeyBinding::kControl;
break;
case nsIDOMKeyEvent::DOM_VK_ALT:
modifierKey = KeyBinding::kAlt;
break;
case nsIDOMKeyEvent::DOM_VK_META:
modifierKey = KeyBinding::kMeta;
break;
case nsIDOMKeyEvent::DOM_VK_WIN:
modifierKey = KeyBinding::kOS;
break;
}
}
}
return KeyBinding(accesskey[0], modifierKey);
}
KeyBinding
XULMenuitemAccessible::KeyboardShortcut() const
{
nsAutoString keyElmId;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::key, keyElmId);
if (keyElmId.IsEmpty())
return KeyBinding();
nsIContent* keyElm = mContent->OwnerDoc()->GetElementById(keyElmId);
if (!keyElm)
return KeyBinding();
uint32_t key = 0;
nsAutoString keyStr;
keyElm->GetAttr(kNameSpaceID_None, nsGkAtoms::key, keyStr);
if (keyStr.IsEmpty()) {
nsAutoString keyCodeStr;
keyElm->GetAttr(kNameSpaceID_None, nsGkAtoms::keycode, keyCodeStr);
nsresult errorCode;
key = keyStr.ToInteger(&errorCode, kAutoDetect);
} else {
key = keyStr[0];
}
nsAutoString modifiersStr;
keyElm->GetAttr(kNameSpaceID_None, nsGkAtoms::modifiers, modifiersStr);
uint32_t modifierMask = 0;
if (modifiersStr.Find("shift") != -1)
modifierMask |= KeyBinding::kShift;
if (modifiersStr.Find("alt") != -1)
modifierMask |= KeyBinding::kAlt;
if (modifiersStr.Find("meta") != -1)
modifierMask |= KeyBinding::kMeta;
if (modifiersStr.Find("os") != -1)
modifierMask |= KeyBinding::kOS;
if (modifiersStr.Find("control") != -1)
modifierMask |= KeyBinding::kControl;
if (modifiersStr.Find("accel") != -1) {
modifierMask |= KeyBinding::AccelModifier();
}
return KeyBinding(key, modifierMask);
}
role
XULMenuitemAccessible::NativeRole()
{
nsCOMPtr<nsIDOMXULContainerElement> xulContainer(do_QueryInterface(mContent));
if (xulContainer)
return roles::PARENT_MENUITEM;
if (mParent && mParent->Role() == roles::COMBOBOX_LIST)
return roles::COMBOBOX_OPTION;
if (mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
nsGkAtoms::radio, eCaseMatters))
return roles::RADIO_MENU_ITEM;
if (mContent->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
nsGkAtoms::checkbox,
eCaseMatters))
return roles::CHECK_MENU_ITEM;
return roles::MENUITEM;
}
int32_t
XULMenuitemAccessible::GetLevelInternal()
{
return nsAccUtils::GetLevelForXULContainerItem(mContent);
}
bool
XULMenuitemAccessible::CanHaveAnonChildren()
{
// That indicates we don't walk anonymous children for menuitems
return false;
}
bool
XULMenuitemAccessible::DoAction(uint8_t index)
{
if (index == eAction_Click) { // default action
DoCommand();
return true;
}
return false;
}
void
XULMenuitemAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName)
{
if (aIndex == eAction_Click)
aName.AssignLiteral("click");
}
uint8_t
XULMenuitemAccessible::ActionCount()
{
return 1;
}
////////////////////////////////////////////////////////////////////////////////
// XULMenuitemAccessible: Widgets
bool
XULMenuitemAccessible::IsActiveWidget() const
{
// Parent menu item is a widget, it's active when its popup is open.
nsIContent* menuPopupContent = mContent->GetFirstChild();
if (menuPopupContent) {
nsMenuPopupFrame* menuPopupFrame =
do_QueryFrame(menuPopupContent->GetPrimaryFrame());
return menuPopupFrame && menuPopupFrame->IsOpen();
}
return false;
}
bool
XULMenuitemAccessible::AreItemsOperable() const
{
// Parent menu item is a widget, its items are operable when its popup is open.
nsIContent* menuPopupContent = mContent->GetFirstChild();
if (menuPopupContent) {
nsMenuPopupFrame* menuPopupFrame =
do_QueryFrame(menuPopupContent->GetPrimaryFrame());
return menuPopupFrame && menuPopupFrame->IsOpen();
}
return false;
}
Accessible*
XULMenuitemAccessible::ContainerWidget() const
{
nsMenuFrame* menuFrame = do_QueryFrame(GetFrame());
if (menuFrame) {
nsMenuParent* menuParent = menuFrame->GetMenuParent();
if (menuParent) {
if (menuParent->IsMenuBar()) // menubar menu
return mParent;
// a menupoup or parent menu item
if (menuParent->IsMenu())
return mParent;
// otherwise it's different kind of popups (like panel or tooltip), it
// shouldn't be a real case.
}
}
return nullptr;
}
////////////////////////////////////////////////////////////////////////////////
// XULMenuSeparatorAccessible
////////////////////////////////////////////////////////////////////////////////
XULMenuSeparatorAccessible::
XULMenuSeparatorAccessible(nsIContent* aContent, DocAccessible* aDoc) :
XULMenuitemAccessible(aContent, aDoc)
{
}
uint64_t
XULMenuSeparatorAccessible::NativeState()
{
// Isn't focusable, but can be offscreen/invisible -- only copy those states
return XULMenuitemAccessible::NativeState() &
(states::OFFSCREEN | states::INVISIBLE);
}
ENameValueFlag
XULMenuSeparatorAccessible::NativeName(nsString& aName)
{
return eNameOK;
}
role
XULMenuSeparatorAccessible::NativeRole()
{
return roles::SEPARATOR;
}
bool
XULMenuSeparatorAccessible::DoAction(uint8_t index)
{
return false;
}
void
XULMenuSeparatorAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName)
{
aName.Truncate();
}
uint8_t
XULMenuSeparatorAccessible::ActionCount()
{
return 0;
}
////////////////////////////////////////////////////////////////////////////////
// XULMenupopupAccessible
////////////////////////////////////////////////////////////////////////////////
XULMenupopupAccessible::
XULMenupopupAccessible(nsIContent* aContent, DocAccessible* aDoc) :
XULSelectControlAccessible(aContent, aDoc)
{
nsMenuPopupFrame* menuPopupFrame = do_QueryFrame(GetFrame());
if (menuPopupFrame && menuPopupFrame->IsMenu())
mType = eMenuPopupType;
// May be the anonymous <menupopup> inside <menulist> (a combobox)
mSelectControl = do_QueryInterface(mContent->GetFlattenedTreeParent());
if (!mSelectControl)
mGenericTypes &= ~eSelect;
}
uint64_t
XULMenupopupAccessible::NativeState()
{
uint64_t state = Accessible::NativeState();
#ifdef DEBUG
// We are onscreen if our parent is active
bool isActive = mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::menuactive);
if (!isActive) {
Accessible* parent = Parent();
if (parent) {
nsIContent* parentContent = parent->GetContent();
if (parentContent)
isActive = parentContent->HasAttr(kNameSpaceID_None, nsGkAtoms::open);
}
}
NS_ASSERTION(isActive || (state & states::INVISIBLE),
"XULMenupopup doesn't have INVISIBLE when it's inactive");
#endif
if (state & states::INVISIBLE)
state |= states::OFFSCREEN | states::COLLAPSED;
return state;
}
ENameValueFlag
XULMenupopupAccessible::NativeName(nsString& aName)
{
nsIContent* content = mContent;
while (content && aName.IsEmpty()) {
content->GetAttr(kNameSpaceID_None, nsGkAtoms::label, aName);
content = content->GetFlattenedTreeParent();
}
return eNameOK;
}
role
XULMenupopupAccessible::NativeRole()
{
// If accessible is not bound to the tree (this happens while children are
// cached) return general role.
if (mParent) {
roles::Role role = mParent->Role();
if (role == roles::COMBOBOX || role == roles::AUTOCOMPLETE)
return roles::COMBOBOX_LIST;
if (role == roles::PUSHBUTTON) {
// Some widgets like the search bar have several popups, owned by buttons.
Accessible* grandParent = mParent->Parent();
if (grandParent && grandParent->Role() == roles::AUTOCOMPLETE)
return roles::COMBOBOX_LIST;
}
}
return roles::MENUPOPUP;
}
////////////////////////////////////////////////////////////////////////////////
// XULMenupopupAccessible: Widgets
bool
XULMenupopupAccessible::IsWidget() const
{
return true;
}
bool
XULMenupopupAccessible::IsActiveWidget() const
{
// If menupopup is a widget (the case of context menus) then active when open.
nsMenuPopupFrame* menuPopupFrame = do_QueryFrame(GetFrame());
return menuPopupFrame && menuPopupFrame->IsOpen();
}
bool
XULMenupopupAccessible::AreItemsOperable() const
{
nsMenuPopupFrame* menuPopupFrame = do_QueryFrame(GetFrame());
return menuPopupFrame && menuPopupFrame->IsOpen();
}
Accessible*
XULMenupopupAccessible::ContainerWidget() const
{
DocAccessible* document = Document();
nsMenuPopupFrame* menuPopupFrame = do_QueryFrame(GetFrame());
while (menuPopupFrame) {
Accessible* menuPopup =
document->GetAccessible(menuPopupFrame->GetContent());
if (!menuPopup) // shouldn't be a real case
return nullptr;
nsMenuFrame* menuFrame = do_QueryFrame(menuPopupFrame->GetParent());
if (!menuFrame) // context menu or popups
return nullptr;
nsMenuParent* menuParent = menuFrame->GetMenuParent();
if (!menuParent) // menulist or menubutton
return menuPopup->Parent();
if (menuParent->IsMenuBar()) { // menubar menu
nsMenuBarFrame* menuBarFrame = static_cast<nsMenuBarFrame*>(menuParent);
return document->GetAccessible(menuBarFrame->GetContent());
}
// different kind of popups like panel or tooltip
if (!menuParent->IsMenu())
return nullptr;
menuPopupFrame = static_cast<nsMenuPopupFrame*>(menuParent);
}
NS_NOTREACHED("Shouldn't be a real case.");
return nullptr;
}
////////////////////////////////////////////////////////////////////////////////
// XULMenubarAccessible
////////////////////////////////////////////////////////////////////////////////
XULMenubarAccessible::
XULMenubarAccessible(nsIContent* aContent, DocAccessible* aDoc) :
AccessibleWrap(aContent, aDoc)
{
}
ENameValueFlag
XULMenubarAccessible::NativeName(nsString& aName)
{
aName.AssignLiteral("Application");
return eNameOK;
}
role
XULMenubarAccessible::NativeRole()
{
return roles::MENUBAR;
}
////////////////////////////////////////////////////////////////////////////////
// XULMenubarAccessible: Widgets
bool
XULMenubarAccessible::IsActiveWidget() const
{
nsMenuBarFrame* menuBarFrame = do_QueryFrame(GetFrame());
return menuBarFrame && menuBarFrame->IsActive();
}
bool
XULMenubarAccessible::AreItemsOperable() const
{
return true;
}
Accessible*
XULMenubarAccessible::CurrentItem()
{
nsMenuBarFrame* menuBarFrame = do_QueryFrame(GetFrame());
if (menuBarFrame) {
nsMenuFrame* menuFrame = menuBarFrame->GetCurrentMenuItem();
if (menuFrame) {
nsIContent* menuItemNode = menuFrame->GetContent();
return mDoc->GetAccessible(menuItemNode);
}
}
return nullptr;
}
void
XULMenubarAccessible::SetCurrentItem(Accessible* aItem)
{
NS_ERROR("XULMenubarAccessible::SetCurrentItem not implemented");
}
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