gecko-dev/accessible/xpcom/xpcAccessible.cpp

598 строки
13 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* 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 "Accessible-inl.h"
#include "nsAccUtils.h"
#include "nsIAccessibleRelation.h"
#include "nsIAccessibleRole.h"
#include "nsAccessibleRelation.h"
#include "Relation.h"
#include "Role.h"
#include "RootAccessible.h"
#include "xpcAccessibleDocument.h"
#include "nsIMutableArray.h"
#include "nsIPersistentProperties2.h"
using namespace mozilla::a11y;
NS_IMETHODIMP
xpcAccessible::GetParent(nsIAccessible** aParent)
{
NS_ENSURE_ARG_POINTER(aParent);
*aParent = nullptr;
if (!Intl())
return NS_ERROR_FAILURE;
NS_IF_ADDREF(*aParent = ToXPC(Intl()->Parent()));
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetNextSibling(nsIAccessible** aNextSibling)
{
NS_ENSURE_ARG_POINTER(aNextSibling);
*aNextSibling = nullptr;
if (!Intl())
return NS_ERROR_FAILURE;
nsresult rv = NS_OK;
NS_IF_ADDREF(*aNextSibling = ToXPC(Intl()->GetSiblingAtOffset(1, &rv)));
return rv;
}
NS_IMETHODIMP
xpcAccessible::GetPreviousSibling(nsIAccessible** aPreviousSibling)
{
NS_ENSURE_ARG_POINTER(aPreviousSibling);
*aPreviousSibling = nullptr;
if (!Intl())
return NS_ERROR_FAILURE;
nsresult rv = NS_OK;
NS_IF_ADDREF(*aPreviousSibling = ToXPC(Intl()->GetSiblingAtOffset(-1, &rv)));
return rv;
}
NS_IMETHODIMP
xpcAccessible::GetFirstChild(nsIAccessible** aFirstChild)
{
NS_ENSURE_ARG_POINTER(aFirstChild);
*aFirstChild = nullptr;
if (!Intl())
return NS_ERROR_FAILURE;
NS_IF_ADDREF(*aFirstChild = ToXPC(Intl()->FirstChild()));
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetLastChild(nsIAccessible** aLastChild)
{
NS_ENSURE_ARG_POINTER(aLastChild);
*aLastChild = nullptr;
if (!Intl())
return NS_ERROR_FAILURE;
NS_IF_ADDREF(*aLastChild = ToXPC(Intl()->LastChild()));
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetChildCount(int32_t* aChildCount)
{
NS_ENSURE_ARG_POINTER(aChildCount);
if (!Intl())
return NS_ERROR_FAILURE;
*aChildCount = Intl()->ChildCount();
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetChildAt(int32_t aChildIndex, nsIAccessible** aChild)
{
NS_ENSURE_ARG_POINTER(aChild);
*aChild = nullptr;
if (!Intl())
return NS_ERROR_FAILURE;
// If child index is negative, then return last child.
// XXX: do we really need this?
if (aChildIndex < 0)
aChildIndex = Intl()->ChildCount() - 1;
Accessible* child = Intl()->GetChildAt(aChildIndex);
if (!child)
return NS_ERROR_INVALID_ARG;
NS_ADDREF(*aChild = ToXPC(child));
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetChildren(nsIArray** aChildren)
{
NS_ENSURE_ARG_POINTER(aChildren);
*aChildren = nullptr;
if (!Intl())
return NS_ERROR_FAILURE;
nsresult rv = NS_OK;
nsCOMPtr<nsIMutableArray> children =
do_CreateInstance(NS_ARRAY_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t childCount = Intl()->ChildCount();
for (uint32_t childIdx = 0; childIdx < childCount; childIdx++) {
Accessible* child = Intl()->GetChildAt(childIdx);
children->AppendElement(static_cast<nsIAccessible*>(ToXPC(child)), false);
}
NS_ADDREF(*aChildren = children);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetIndexInParent(int32_t* aIndexInParent)
{
NS_ENSURE_ARG_POINTER(aIndexInParent);
*aIndexInParent = -1;
if (!Intl())
return NS_ERROR_FAILURE;
*aIndexInParent = Intl()->IndexInParent();
return *aIndexInParent != -1 ? NS_OK : NS_ERROR_FAILURE;
}
NS_IMETHODIMP
xpcAccessible::GetDOMNode(nsIDOMNode** aDOMNode)
{
NS_ENSURE_ARG_POINTER(aDOMNode);
*aDOMNode = nullptr;
if (!Intl())
return NS_ERROR_FAILURE;
nsINode* node = Intl()->GetNode();
if (node)
CallQueryInterface(node, aDOMNode);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetDocument(nsIAccessibleDocument** aDocument)
{
NS_ENSURE_ARG_POINTER(aDocument);
*aDocument = nullptr;
if (!Intl())
return NS_ERROR_FAILURE;
NS_IF_ADDREF(*aDocument = ToXPCDocument(Intl()->Document()));
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetRootDocument(nsIAccessibleDocument** aRootDocument)
{
NS_ENSURE_ARG_POINTER(aRootDocument);
*aRootDocument = nullptr;
if (!Intl())
return NS_ERROR_FAILURE;
NS_IF_ADDREF(*aRootDocument = ToXPCDocument(Intl()->RootAccessible()));
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetRole(uint32_t* aRole)
{
NS_ENSURE_ARG_POINTER(aRole);
*aRole = nsIAccessibleRole::ROLE_NOTHING;
if (!Intl())
return NS_ERROR_FAILURE;
*aRole = Intl()->Role();
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetState(uint32_t* aState, uint32_t* aExtraState)
{
NS_ENSURE_ARG_POINTER(aState);
if (!Intl())
nsAccUtils::To32States(states::DEFUNCT, aState, aExtraState);
else
nsAccUtils::To32States(Intl()->State(), aState, aExtraState);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetName(nsAString& aName)
{
aName.Truncate();
if (!Intl())
return NS_ERROR_FAILURE;
nsAutoString name;
Intl()->Name(name);
aName.Assign(name);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetDescription(nsAString& aDescription)
{
if (!Intl())
return NS_ERROR_FAILURE;
nsAutoString desc;
Intl()->Description(desc);
aDescription.Assign(desc);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetLanguage(nsAString& aLanguage)
{
if (!Intl())
return NS_ERROR_FAILURE;
Intl()->Language(aLanguage);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetValue(nsAString& aValue)
{
if (!Intl())
return NS_ERROR_FAILURE;
nsAutoString value;
Intl()->Value(value);
aValue.Assign(value);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetHelp(nsAString& aHelp)
{
if (!Intl())
return NS_ERROR_FAILURE;
nsAutoString help;
Intl()->Help(help);
aHelp.Assign(help);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetAccessKey(nsAString& aAccessKey)
{
aAccessKey.Truncate();
if (!Intl())
return NS_ERROR_FAILURE;
Intl()->AccessKey().ToString(aAccessKey);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetKeyboardShortcut(nsAString& aKeyBinding)
{
aKeyBinding.Truncate();
if (!Intl())
return NS_ERROR_FAILURE;
Intl()->KeyboardShortcut().ToString(aKeyBinding);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetAttributes(nsIPersistentProperties** aAttributes)
{
NS_ENSURE_ARG_POINTER(aAttributes);
*aAttributes = nullptr;
if (!Intl())
return NS_ERROR_FAILURE;
nsCOMPtr<nsIPersistentProperties> attributes = Intl()->Attributes();
attributes.swap(*aAttributes);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetBounds(int32_t* aX, int32_t* aY,
int32_t* aWidth, int32_t* aHeight)
{
NS_ENSURE_ARG_POINTER(aX);
*aX = 0;
NS_ENSURE_ARG_POINTER(aY);
*aY = 0;
NS_ENSURE_ARG_POINTER(aWidth);
*aWidth = 0;
NS_ENSURE_ARG_POINTER(aHeight);
*aHeight = 0;
if (!Intl())
return NS_ERROR_FAILURE;
nsIntRect rect = Intl()->Bounds();
*aX = rect.x;
*aY = rect.y;
*aWidth = rect.width;
*aHeight = rect.height;;
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GroupPosition(int32_t* aGroupLevel,
int32_t* aSimilarItemsInGroup,
int32_t* aPositionInGroup)
{
NS_ENSURE_ARG_POINTER(aGroupLevel);
*aGroupLevel = 0;
NS_ENSURE_ARG_POINTER(aSimilarItemsInGroup);
*aSimilarItemsInGroup = 0;
NS_ENSURE_ARG_POINTER(aPositionInGroup);
*aPositionInGroup = 0;
if (!Intl())
return NS_ERROR_FAILURE;
GroupPos groupPos = Intl()->GroupPosition();
*aGroupLevel = groupPos.level;
*aSimilarItemsInGroup = groupPos.setSize;
*aPositionInGroup = groupPos.posInSet;
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetRelationByType(uint32_t aType,
nsIAccessibleRelation** aRelation)
{
NS_ENSURE_ARG_POINTER(aRelation);
*aRelation = nullptr;
NS_ENSURE_ARG(aType <= static_cast<uint32_t>(RelationType::LAST));
if (!Intl())
return NS_ERROR_FAILURE;
Relation rel = Intl()->RelationByType(static_cast<RelationType>(aType));
NS_ADDREF(*aRelation = new nsAccessibleRelation(aType, &rel));
return *aRelation ? NS_OK : NS_ERROR_FAILURE;
}
NS_IMETHODIMP
xpcAccessible::GetRelations(nsIArray** aRelations)
{
NS_ENSURE_ARG_POINTER(aRelations);
*aRelations = nullptr;
if (!Intl())
return NS_ERROR_FAILURE;
nsCOMPtr<nsIMutableArray> relations = do_CreateInstance(NS_ARRAY_CONTRACTID);
NS_ENSURE_TRUE(relations, NS_ERROR_OUT_OF_MEMORY);
static const uint32_t relationTypes[] = {
nsIAccessibleRelation::RELATION_LABELLED_BY,
nsIAccessibleRelation::RELATION_LABEL_FOR,
nsIAccessibleRelation::RELATION_DESCRIBED_BY,
nsIAccessibleRelation::RELATION_DESCRIPTION_FOR,
nsIAccessibleRelation::RELATION_NODE_CHILD_OF,
nsIAccessibleRelation::RELATION_NODE_PARENT_OF,
nsIAccessibleRelation::RELATION_CONTROLLED_BY,
nsIAccessibleRelation::RELATION_CONTROLLER_FOR,
nsIAccessibleRelation::RELATION_FLOWS_TO,
nsIAccessibleRelation::RELATION_FLOWS_FROM,
nsIAccessibleRelation::RELATION_MEMBER_OF,
nsIAccessibleRelation::RELATION_SUBWINDOW_OF,
nsIAccessibleRelation::RELATION_EMBEDS,
nsIAccessibleRelation::RELATION_EMBEDDED_BY,
nsIAccessibleRelation::RELATION_POPUP_FOR,
nsIAccessibleRelation::RELATION_PARENT_WINDOW_OF,
nsIAccessibleRelation::RELATION_DEFAULT_BUTTON,
nsIAccessibleRelation::RELATION_CONTAINING_DOCUMENT,
nsIAccessibleRelation::RELATION_CONTAINING_TAB_PANE,
nsIAccessibleRelation::RELATION_CONTAINING_APPLICATION
};
for (uint32_t idx = 0; idx < ArrayLength(relationTypes); idx++) {
nsCOMPtr<nsIAccessibleRelation> relation;
nsresult rv = GetRelationByType(relationTypes[idx], getter_AddRefs(relation));
if (NS_SUCCEEDED(rv) && relation) {
uint32_t targets = 0;
relation->GetTargetsCount(&targets);
if (targets)
relations->AppendElement(relation, false);
}
}
NS_ADDREF(*aRelations = relations);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetFocusedChild(nsIAccessible** aChild)
{
NS_ENSURE_ARG_POINTER(aChild);
*aChild = nullptr;
if (!Intl())
return NS_ERROR_FAILURE;
NS_IF_ADDREF(*aChild = ToXPC(Intl()->FocusedChild()));
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetChildAtPoint(int32_t aX, int32_t aY,
nsIAccessible** aAccessible)
{
NS_ENSURE_ARG_POINTER(aAccessible);
*aAccessible = nullptr;
if (!Intl())
return NS_ERROR_FAILURE;
NS_IF_ADDREF(*aAccessible =
ToXPC(Intl()->ChildAtPoint(aX, aY, Accessible::eDirectChild)));
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetDeepestChildAtPoint(int32_t aX, int32_t aY,
nsIAccessible** aAccessible)
{
NS_ENSURE_ARG_POINTER(aAccessible);
*aAccessible = nullptr;
if (!Intl())
return NS_ERROR_FAILURE;
NS_IF_ADDREF(*aAccessible =
ToXPC(Intl()->ChildAtPoint(aX, aY, Accessible::eDeepestChild)));
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::SetSelected(bool aSelect)
{
if (!Intl())
return NS_ERROR_FAILURE;
Intl()->SetSelected(aSelect);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::ExtendSelection()
{
if (!Intl())
return NS_ERROR_FAILURE;
Intl()->ExtendSelection();
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::TakeSelection()
{
if (!Intl())
return NS_ERROR_FAILURE;
Intl()->TakeSelection();
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::TakeFocus()
{
if (!Intl())
return NS_ERROR_FAILURE;
Intl()->TakeFocus();
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetActionCount(uint8_t* aActionCount)
{
NS_ENSURE_ARG_POINTER(aActionCount);
*aActionCount = 0;
if (!Intl())
return NS_ERROR_FAILURE;
*aActionCount = Intl()->ActionCount();
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetActionName(uint8_t aIndex, nsAString& aName)
{
if (!Intl())
return NS_ERROR_FAILURE;
if (aIndex >= Intl()->ActionCount())
return NS_ERROR_INVALID_ARG;
Intl()->ActionNameAt(aIndex, aName);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::GetActionDescription(uint8_t aIndex, nsAString& aDescription)
{
if (!Intl())
return NS_ERROR_FAILURE;
if (aIndex >= Intl()->ActionCount())
return NS_ERROR_INVALID_ARG;
Intl()->ActionDescriptionAt(aIndex, aDescription);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::DoAction(uint8_t aIndex)
{
if (!Intl())
return NS_ERROR_FAILURE;
return Intl()->DoAction(aIndex) ?
NS_OK : NS_ERROR_INVALID_ARG;
}
NS_IMETHODIMP
xpcAccessible::ScrollTo(uint32_t aHow)
{
if (!Intl())
return NS_ERROR_FAILURE;
Intl()->ScrollTo(aHow);
return NS_OK;
}
NS_IMETHODIMP
xpcAccessible::ScrollToPoint(uint32_t aCoordinateType, int32_t aX, int32_t aY)
{
if (!Intl())
return NS_ERROR_FAILURE;
Intl()->ScrollToPoint(aCoordinateType, aX, aY);
return NS_OK;
}