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Mozilla/mozilla/accessible/src/html/nsHTMLSelectAccessible.cpp
marco.zehe%googlemail.com 7e685ffd51 bug 431656 - SELECTED and SELECTABLE states not exposed for html multiselectable lists 
patch by Alexander Surkov (surkov.alexander@gmail.com)
r=me
a1.9=dsicore


git-svn-id: svn://10.0.0.236/trunk@251090 18797224-902f-48f8-a5cc-f745e15eee43
2008-05-02 08:50:35 +00:00

1533 lines
49 KiB
C++
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Kyle Yuan (kyle.yuan@sun.com)
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsCOMPtr.h"
#include "nsHTMLSelectAccessible.h"
#include "nsIAccessibilityService.h"
#include "nsIAccessibleEvent.h"
#include "nsIFrame.h"
#include "nsIComboboxControlFrame.h"
#include "nsIDocument.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsIDOMHTMLOptGroupElement.h"
#include "nsIDOMHTMLSelectElement.h"
#include "nsIListControlFrame.h"
#include "nsIServiceManager.h"
#include "nsIMutableArray.h"
/**
* Selects, Listboxes and Comboboxes, are made up of a number of different
* widgets, some of which are shared between the two. This file contains
* all of the widgets for both of the Selects, for HTML only.
*
* Listbox:
* - nsHTMLSelectListAccessible
* - nsHTMLSelectOptionAccessible
*
* Comboboxes:
* - nsHTMLComboboxAccessible
* - nsHTMLComboboxTextFieldAccessible (#ifdef COMBO_BOX_WITH_THREE_CHILDREN)
* - nsHTMLComboboxButtonAccessible (#ifdef COMBO_BOX_WITH_THREE_CHILDREN)
* - nsHTMLComboboxListAccessible [ inserted in accessible tree ]
* - nsHTMLSelectOptionAccessible(s)
*
* XXX COMBO_BOX_WITH_THREE_CHILDREN is not currently defined.
* If we start using it again, we should pass the correct frame into those accessibles.
* They share a DOM node with the parent combobox.
*/
/** ------------------------------------------------------ */
/** Impl. of nsHTMLSelectableAccessible */
/** ------------------------------------------------------ */
// Helper class
nsHTMLSelectableAccessible::iterator::iterator(nsHTMLSelectableAccessible *aParent, nsIWeakReference *aWeakShell):
mWeakShell(aWeakShell), mParentSelect(aParent)
{
mLength = mIndex = 0;
mSelCount = 0;
nsCOMPtr<nsIDOMHTMLSelectElement> htmlSelect(do_QueryInterface(mParentSelect->mDOMNode));
if (htmlSelect) {
htmlSelect->GetOptions(getter_AddRefs(mOptions));
if (mOptions)
mOptions->GetLength(&mLength);
}
}
PRBool nsHTMLSelectableAccessible::iterator::Advance()
{
if (mIndex < mLength) {
nsCOMPtr<nsIDOMNode> tempNode;
if (mOptions) {
mOptions->Item(mIndex, getter_AddRefs(tempNode));
mOption = do_QueryInterface(tempNode);
}
mIndex++;
return PR_TRUE;
}
return PR_FALSE;
}
void nsHTMLSelectableAccessible::iterator::CalcSelectionCount(PRInt32 *aSelectionCount)
{
PRBool isSelected = PR_FALSE;
if (mOption)
mOption->GetSelected(&isSelected);
if (isSelected)
(*aSelectionCount)++;
}
void nsHTMLSelectableAccessible::iterator::AddAccessibleIfSelected(nsIAccessibilityService *aAccService,
nsIMutableArray *aSelectedAccessibles,
nsPresContext *aContext)
{
PRBool isSelected = PR_FALSE;
nsCOMPtr<nsIAccessible> tempAccess;
if (mOption) {
mOption->GetSelected(&isSelected);
if (isSelected) {
nsCOMPtr<nsIDOMNode> optionNode(do_QueryInterface(mOption));
aAccService->GetAccessibleInWeakShell(optionNode, mWeakShell, getter_AddRefs(tempAccess));
}
}
if (tempAccess)
aSelectedAccessibles->AppendElement(static_cast<nsISupports*>(tempAccess), PR_FALSE);
}
PRBool nsHTMLSelectableAccessible::iterator::GetAccessibleIfSelected(PRInt32 aIndex,
nsIAccessibilityService *aAccService,
nsPresContext *aContext,
nsIAccessible **aAccessible)
{
PRBool isSelected = PR_FALSE;
*aAccessible = nsnull;
if (mOption) {
mOption->GetSelected(&isSelected);
if (isSelected) {
if (mSelCount == aIndex) {
nsCOMPtr<nsIDOMNode> optionNode(do_QueryInterface(mOption));
aAccService->GetAccessibleInWeakShell(optionNode, mWeakShell, aAccessible);
return PR_TRUE;
}
mSelCount++;
}
}
return PR_FALSE;
}
void nsHTMLSelectableAccessible::iterator::Select(PRBool aSelect)
{
if (mOption)
mOption->SetSelected(aSelect);
}
nsHTMLSelectableAccessible::nsHTMLSelectableAccessible(nsIDOMNode* aDOMNode,
nsIWeakReference* aShell):
nsAccessibleWrap(aDOMNode, aShell)
{
}
NS_IMPL_ISUPPORTS_INHERITED1(nsHTMLSelectableAccessible, nsAccessible, nsIAccessibleSelectable)
// Helper methods
NS_IMETHODIMP nsHTMLSelectableAccessible::ChangeSelection(PRInt32 aIndex, PRUint8 aMethod, PRBool *aSelState)
{
*aSelState = PR_FALSE;
nsCOMPtr<nsIDOMHTMLSelectElement> htmlSelect(do_QueryInterface(mDOMNode));
if (!htmlSelect)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMHTMLOptionsCollection> options;
htmlSelect->GetOptions(getter_AddRefs(options));
if (!options)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDOMNode> tempNode;
options->Item(aIndex, getter_AddRefs(tempNode));
nsCOMPtr<nsIDOMHTMLOptionElement> tempOption(do_QueryInterface(tempNode));
if (!tempOption)
return NS_ERROR_FAILURE;
tempOption->GetSelected(aSelState);
nsresult rv = NS_OK;
if (eSelection_Add == aMethod && !(*aSelState))
rv = tempOption->SetSelected(PR_TRUE);
else if (eSelection_Remove == aMethod && (*aSelState))
rv = tempOption->SetSelected(PR_FALSE);
return rv;
}
// Interface methods
NS_IMETHODIMP nsHTMLSelectableAccessible::GetSelectedChildren(nsIArray **_retval)
{
*_retval = nsnull;
nsCOMPtr<nsIAccessibilityService> accService(do_GetService("@mozilla.org/accessibilityService;1"));
if (!accService)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIMutableArray> selectedAccessibles =
do_CreateInstance(NS_ARRAY_CONTRACTID);
NS_ENSURE_STATE(selectedAccessibles);
nsPresContext *context = GetPresContext();
if (!context)
return NS_ERROR_FAILURE;
nsHTMLSelectableAccessible::iterator iter(this, mWeakShell);
while (iter.Advance())
iter.AddAccessibleIfSelected(accService, selectedAccessibles, context);
PRUint32 uLength = 0;
selectedAccessibles->GetLength(&uLength);
if (uLength != 0) { // length of nsIArray containing selected options
*_retval = selectedAccessibles;
NS_ADDREF(*_retval);
}
return NS_OK;
}
// return the nth selected child's nsIAccessible object
NS_IMETHODIMP nsHTMLSelectableAccessible::RefSelection(PRInt32 aIndex, nsIAccessible **_retval)
{
*_retval = nsnull;
nsCOMPtr<nsIAccessibilityService> accService(do_GetService("@mozilla.org/accessibilityService;1"));
if (!accService)
return NS_ERROR_FAILURE;
nsPresContext *context = GetPresContext();
if (!context)
return NS_ERROR_FAILURE;
nsHTMLSelectableAccessible::iterator iter(this, mWeakShell);
while (iter.Advance())
if (iter.GetAccessibleIfSelected(aIndex, accService, context, _retval))
return NS_OK;
// No matched item found
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP nsHTMLSelectableAccessible::GetSelectionCount(PRInt32 *aSelectionCount)
{
*aSelectionCount = 0;
nsHTMLSelectableAccessible::iterator iter(this, mWeakShell);
while (iter.Advance())
iter.CalcSelectionCount(aSelectionCount);
return NS_OK;
}
NS_IMETHODIMP nsHTMLSelectableAccessible::AddChildToSelection(PRInt32 aIndex)
{
PRBool isSelected;
return ChangeSelection(aIndex, eSelection_Add, &isSelected);
}
NS_IMETHODIMP nsHTMLSelectableAccessible::RemoveChildFromSelection(PRInt32 aIndex)
{
PRBool isSelected;
return ChangeSelection(aIndex, eSelection_Remove, &isSelected);
}
NS_IMETHODIMP nsHTMLSelectableAccessible::IsChildSelected(PRInt32 aIndex, PRBool *_retval)
{
*_retval = PR_FALSE;
return ChangeSelection(aIndex, eSelection_GetState, _retval);
}
NS_IMETHODIMP nsHTMLSelectableAccessible::ClearSelection()
{
nsHTMLSelectableAccessible::iterator iter(this, mWeakShell);
while (iter.Advance())
iter.Select(PR_FALSE);
return NS_OK;
}
NS_IMETHODIMP nsHTMLSelectableAccessible::SelectAllSelection(PRBool *_retval)
{
*_retval = PR_FALSE;
nsCOMPtr<nsIDOMHTMLSelectElement> htmlSelect(do_QueryInterface(mDOMNode));
if (!htmlSelect)
return NS_ERROR_FAILURE;
htmlSelect->GetMultiple(_retval);
if (*_retval) {
nsHTMLSelectableAccessible::iterator iter(this, mWeakShell);
while (iter.Advance())
iter.Select(PR_TRUE);
}
return NS_OK;
}
/** ------------------------------------------------------ */
/** First, the common widgets */
/** ------------------------------------------------------ */
/** ----- nsHTMLSelectListAccessible ----- */
/** Default Constructor */
nsHTMLSelectListAccessible::nsHTMLSelectListAccessible(nsIDOMNode* aDOMNode,
nsIWeakReference* aShell)
:nsHTMLSelectableAccessible(aDOMNode, aShell)
{
}
/**
* As a nsHTMLSelectListAccessible we can have the following states:
* nsIAccessibleStates::STATE_MULTISELECTABLE
* nsIAccessibleStates::STATE_EXTSELECTABLE
*/
NS_IMETHODIMP
nsHTMLSelectListAccessible::GetState(PRUint32 *aState, PRUint32 *aExtraState)
{
nsresult rv = nsHTMLSelectableAccessible::GetState(aState, aExtraState);
NS_ENSURE_SUCCESS(rv, rv);
if (!mDOMNode)
return NS_OK;
nsCOMPtr<nsIDOMHTMLSelectElement> select (do_QueryInterface(mDOMNode));
if (select) {
if (*aState | nsIAccessibleStates::STATE_FOCUSED) {
// Treat first focusable option node as actual focus, in order
// to avoid confusing JAWS, which needs focus on the option
nsCOMPtr<nsIDOMNode> focusedOption;
nsHTMLSelectOptionAccessible::GetFocusedOptionNode(mDOMNode,
getter_AddRefs(focusedOption));
if (focusedOption) { // Clear focused state since it is on option
*aState &= ~nsIAccessibleStates::STATE_FOCUSED;
}
}
PRBool multiple;
select->GetMultiple(&multiple);
if ( multiple )
*aState |= nsIAccessibleStates::STATE_MULTISELECTABLE |
nsIAccessibleStates::STATE_EXTSELECTABLE;
}
return NS_OK;
}
NS_IMETHODIMP nsHTMLSelectListAccessible::GetRole(PRUint32 *aRole)
{
if (mParent && Role(mParent) == nsIAccessibleRole::ROLE_COMBOBOX) {
*aRole = nsIAccessibleRole::ROLE_COMBOBOX_LIST;
}
else {
*aRole = nsIAccessibleRole::ROLE_LIST;
}
return NS_OK;
}
already_AddRefed<nsIAccessible>
nsHTMLSelectListAccessible::AccessibleForOption(nsIAccessibilityService *aAccService,
nsIContent *aContent,
nsIAccessible *aLastGoodAccessible,
PRInt32 *aChildCount)
{
nsCOMPtr<nsIDOMNode> domNode(do_QueryInterface(aContent));
NS_ASSERTION(domNode, "DOM node is null");
// Accessibility service will initialize & cache any accessibles created
nsCOMPtr<nsIAccessible> accessible;
aAccService->GetAccessibleInWeakShell(domNode, mWeakShell, getter_AddRefs(accessible));
nsCOMPtr<nsPIAccessible> privateAccessible(do_QueryInterface(accessible));
if (!privateAccessible) {
return nsnull;
}
++ *aChildCount;
privateAccessible->SetParent(this);
nsCOMPtr<nsPIAccessible> privatePrevAccessible(do_QueryInterface(aLastGoodAccessible));
if (privatePrevAccessible) {
privatePrevAccessible->SetNextSibling(accessible);
}
if (!mFirstChild) {
mFirstChild = accessible;
}
nsIAccessible *returnAccessible = accessible;
NS_ADDREF(returnAccessible);
return returnAccessible;
}
already_AddRefed<nsIAccessible>
nsHTMLSelectListAccessible::CacheOptSiblings(nsIAccessibilityService *aAccService,
nsIContent *aParentContent,
nsIAccessible *aLastGoodAccessible,
PRInt32 *aChildCount)
{
// Recursive helper for CacheChildren()
PRUint32 numChildren = aParentContent->GetChildCount();
nsCOMPtr<nsIAccessible> lastGoodAccessible(aLastGoodAccessible);
nsCOMPtr<nsIAccessible> newAccessible;
for (PRUint32 count = 0; count < numChildren; count ++) {
nsIContent *childContent = aParentContent->GetChildAt(count);
if (!childContent->IsNodeOfType(nsINode::eHTML)) {
continue;
}
nsCOMPtr<nsIAtom> tag = childContent->Tag();
if (tag == nsAccessibilityAtoms::option || tag == nsAccessibilityAtoms::optgroup) {
newAccessible = AccessibleForOption(aAccService,
childContent,
lastGoodAccessible,
aChildCount);
if (newAccessible) {
lastGoodAccessible = newAccessible;
}
if (tag == nsAccessibilityAtoms::optgroup) {
newAccessible = CacheOptSiblings(aAccService, childContent,
lastGoodAccessible, aChildCount);
if (newAccessible) {
lastGoodAccessible = newAccessible;
}
}
}
}
if (lastGoodAccessible) {
nsCOMPtr<nsPIAccessible> privateLastAcc =
do_QueryInterface(lastGoodAccessible);
privateLastAcc->SetNextSibling(nsnull);
NS_ADDREF(aLastGoodAccessible = lastGoodAccessible);
}
return aLastGoodAccessible;
}
/**
* Cache the children and child count of a Select List Accessible. We want to count
* all the <optgroup>s and <option>s as children because we want a
* flat tree under the Select List.
*/
void nsHTMLSelectListAccessible::CacheChildren()
{
// Cache the number of <optgroup> and <option> DOM decendents,
// as well as the accessibles for them. Avoid whitespace text nodes.
nsCOMPtr<nsIContent> selectContent(do_QueryInterface(mDOMNode));
nsCOMPtr<nsIAccessibilityService> accService(do_GetService("@mozilla.org/accessibilityService;1"));
if (!selectContent || !accService) {
mAccChildCount = eChildCountUninitialized;
return;
}
if (mAccChildCount != eChildCountUninitialized) {
return;
}
mAccChildCount = 0; // Avoid reentry
PRInt32 childCount = 0;
nsCOMPtr<nsIAccessible> lastGoodAccessible =
CacheOptSiblings(accService, selectContent, nsnull, &childCount);
mAccChildCount = childCount;
}
/** ----- nsHTMLSelectOptionAccessible ----- */
/** Default Constructor */
nsHTMLSelectOptionAccessible::nsHTMLSelectOptionAccessible(nsIDOMNode* aDOMNode, nsIWeakReference* aShell):
nsHyperTextAccessibleWrap(aDOMNode, aShell)
{
nsCOMPtr<nsIAccessibilityService> accService(do_GetService("@mozilla.org/accessibilityService;1"));
nsCOMPtr<nsIDOMNode> parentNode;
aDOMNode->GetParentNode(getter_AddRefs(parentNode));
nsCOMPtr<nsIAccessible> parentAccessible;
if (parentNode) {
// If the parent node is a Combobox, then the option's accessible parent
// is nsHTMLComboboxListAccessible, not the nsHTMLComboboxAccessible that
// GetParent would normally return. This is because the
// nsHTMLComboboxListAccessible is inserted into the accessible hierarchy
// where there is no DOM node for it.
accService->GetAccessibleInWeakShell(parentNode, mWeakShell, getter_AddRefs(parentAccessible));
if (parentAccessible) {
PRUint32 role;
parentAccessible->GetRole(&role);
if (role == nsIAccessibleRole::ROLE_COMBOBOX) {
nsCOMPtr<nsIAccessible> comboAccessible(parentAccessible);
comboAccessible->GetLastChild(getter_AddRefs(parentAccessible));
}
}
}
SetParent(parentAccessible);
}
/** We are a ListItem */
NS_IMETHODIMP nsHTMLSelectOptionAccessible::GetRole(PRUint32 *aRole)
{
if (mParent && Role(mParent) == nsIAccessibleRole::ROLE_COMBOBOX_LIST) {
*aRole = nsIAccessibleRole::ROLE_COMBOBOX_OPTION;
}
else {
*aRole = nsIAccessibleRole::ROLE_OPTION;
}
return NS_OK;
}
/**
* Get our Name from our Content's subtree
*/
NS_IMETHODIMP nsHTMLSelectOptionAccessible::GetName(nsAString& aName)
{
// CASE #1 -- great majority of the cases
// find the label attribute - this is what the W3C says we should use
nsCOMPtr<nsIDOMElement> domElement(do_QueryInterface(mDOMNode));
if (!domElement)
return NS_ERROR_FAILURE;
nsresult rv = domElement->GetAttribute(NS_LITERAL_STRING("label"), aName) ;
if (NS_SUCCEEDED(rv) && !aName.IsEmpty()) {
return NS_OK;
}
// CASE #2 -- no label parameter, get the first child,
// use it if it is a text node
nsCOMPtr<nsIDOMNode> child;
mDOMNode->GetFirstChild(getter_AddRefs(child));
if (child) {
nsCOMPtr<nsIContent> text = do_QueryInterface(child);
if (text && text->IsNodeOfType(nsINode::eTEXT)) {
nsAutoString txtValue;
rv = AppendFlatStringFromContentNode(text, &txtValue);
NS_ENSURE_SUCCESS(rv, rv);
// Temp var (txtValue) needed until CompressWhitespace built for nsAString
txtValue.CompressWhitespace();
aName.Assign(txtValue);
return NS_OK;
}
}
aName.Truncate();
return NS_OK;
}
nsresult
nsHTMLSelectOptionAccessible::GetAttributesInternal(nsIPersistentProperties *aAttributes)
{
NS_ENSURE_ARG_POINTER(aAttributes);
if (!mDOMNode) {
return NS_ERROR_FAILURE; // Accessible shut down
}
nsresult rv = nsHyperTextAccessibleWrap::GetAttributesInternal(aAttributes);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMNode> parentNode;
mDOMNode->GetParentNode(getter_AddRefs(parentNode));
nsCOMPtr<nsIDOMElement> parentElement(do_QueryInterface(parentNode));
NS_ENSURE_TRUE(parentElement, NS_ERROR_FAILURE);
nsAutoString parentTagName;
parentNode->GetLocalName(parentTagName);
PRInt32 level = parentTagName.LowerCaseEqualsLiteral("optgroup") ? 2 : 1;
if (level == 1 && Role(this) != nsIAccessibleRole::ROLE_HEADING) {
level = 0; // In a single level list, the level is irrelevant
}
nsAutoString tagName;
mDOMNode->GetLocalName(tagName); // Will be looking for similar DOM siblings
nsCOMPtr<nsIDOMNodeList> siblings;
parentElement->GetElementsByTagName(tagName, getter_AddRefs(siblings));
PRInt32 posInSet = 0;
PRUint32 setSize = 0;
if (siblings) {
siblings->GetLength(&setSize);
nsCOMPtr<nsIDOMNode> itemNode;
while (NS_SUCCEEDED(siblings->Item(posInSet ++, getter_AddRefs(itemNode))) &&
itemNode != mDOMNode) {
// Keep looping, to increment posInSet
}
}
nsAccUtils::SetAccGroupAttrs(aAttributes, level, posInSet,
static_cast<PRInt32>(setSize));
return NS_OK;
}
nsIFrame* nsHTMLSelectOptionAccessible::GetBoundsFrame()
{
PRUint32 state;
nsCOMPtr<nsIContent> content = GetSelectState(&state);
if (state & nsIAccessibleStates::STATE_COLLAPSED) {
nsCOMPtr<nsIPresShell> presShell(GetPresShell());
if (!presShell) {
return nsnull;
}
return presShell->GetPrimaryFrameFor(content);
}
return nsAccessible::GetBoundsFrame();
}
/**
* As a nsHTMLSelectOptionAccessible we can have the following states:
* STATE_SELECTABLE
* STATE_SELECTED
* STATE_FOCUSED
* STATE_FOCUSABLE
* STATE_OFFSCREEN
*/
NS_IMETHODIMP
nsHTMLSelectOptionAccessible::GetState(PRUint32 *aState, PRUint32 *aExtraState)
{
// Upcall to nsAccessible, but skip nsHyperTextAccessible impl
// because we don't want EXT_STATE_EDITABLE or EXT_STATE_SELECTABLE_TEXT
nsresult rv = nsAccessible::GetState(aState, aExtraState);
NS_ENSURE_SUCCESS(rv, rv);
if (!mDOMNode)
return NS_OK;
PRUint32 selectState, selectExtState;
nsCOMPtr<nsIContent> selectContent = GetSelectState(&selectState,
&selectExtState);
if (selectState & nsIAccessibleStates::STATE_INVISIBLE) {
return NS_OK;
}
nsCOMPtr<nsIDOMNode> selectNode = do_QueryInterface(selectContent);
NS_ENSURE_TRUE(selectNode, NS_ERROR_FAILURE);
// Is disabled?
if (0 == (*aState & nsIAccessibleStates::STATE_UNAVAILABLE)) {
*aState |= (nsIAccessibleStates::STATE_FOCUSABLE |
nsIAccessibleStates::STATE_SELECTABLE);
// When the list is focused but no option is actually focused,
// Firefox draws a focus ring around the first non-disabled option.
// We need to indicated STATE_FOCUSED in that case, because it
// prevents JAWS from ignoring the list
// GetFocusedOptionNode() ensures that an option node is
// returned in this case, as long as some focusable option exists
// in the listbox
nsCOMPtr<nsIDOMNode> focusedOptionNode;
GetFocusedOptionNode(selectNode, getter_AddRefs(focusedOptionNode));
if (focusedOptionNode == mDOMNode) {
*aState |= nsIAccessibleStates::STATE_FOCUSED;
}
}
// Are we selected?
PRBool isSelected = PR_FALSE;
nsCOMPtr<nsIDOMHTMLOptionElement> option (do_QueryInterface(mDOMNode));
if (option) {
option->GetSelected(&isSelected);
if ( isSelected )
*aState |= nsIAccessibleStates::STATE_SELECTED;
}
if (selectState & nsIAccessibleStates::STATE_OFFSCREEN) {
*aState |= nsIAccessibleStates::STATE_OFFSCREEN;
}
else if (selectState & nsIAccessibleStates::STATE_COLLAPSED) {
// <select> is COLLAPSED: add STATE_OFFSCREEN, if not the currently
// visible option
if (!isSelected) {
*aState |= nsIAccessibleStates::STATE_OFFSCREEN;
}
else {
// Clear offscreen and invisible for currently showing option
*aState &= ~nsIAccessibleStates::STATE_OFFSCREEN;
*aState &= ~nsIAccessibleStates::STATE_INVISIBLE;
if (aExtraState) {
*aExtraState |= selectExtState & nsIAccessibleStates::EXT_STATE_OPAQUE;
}
}
}
else {
// XXX list frames are weird, don't rely on nsAccessible's general
// visibility implementation unless they get reimplemented in layout
*aState &= ~nsIAccessibleStates::STATE_OFFSCREEN;
// <select> is not collapsed: compare bounds to calculate STATE_OFFSCREEN
nsCOMPtr<nsIAccessible> listAccessible = GetParent();
if (listAccessible) {
PRInt32 optionX, optionY, optionWidth, optionHeight;
PRInt32 listX, listY, listWidth, listHeight;
GetBounds(&optionX, &optionY, &optionWidth, &optionHeight);
listAccessible->GetBounds(&listX, &listY, &listWidth, &listHeight);
if (optionY < listY || optionY + optionHeight > listY + listHeight) {
*aState |= nsIAccessibleStates::STATE_OFFSCREEN;
}
}
}
return NS_OK;
}
/** select us! close combo box if necessary*/
NS_IMETHODIMP nsHTMLSelectOptionAccessible::GetActionName(PRUint8 aIndex, nsAString& aName)
{
if (aIndex == eAction_Select) {
aName.AssignLiteral("select");
return NS_OK;
}
return NS_ERROR_INVALID_ARG;
}
NS_IMETHODIMP nsHTMLSelectOptionAccessible::GetNumActions(PRUint8 *_retval)
{
*_retval = 1;
return NS_OK;
}
NS_IMETHODIMP nsHTMLSelectOptionAccessible::DoAction(PRUint8 index)
{
if (index == eAction_Select) { // default action
nsCOMPtr<nsIDOMHTMLOptionElement> newHTMLOption(do_QueryInterface(mDOMNode));
if (!newHTMLOption)
return NS_ERROR_FAILURE;
// Clear old selection
nsCOMPtr<nsIDOMNode> oldHTMLOptionNode, selectNode;
nsCOMPtr<nsIAccessible> parent(GetParent());
nsCOMPtr<nsIAccessNode> accessNode(do_QueryInterface(parent));
NS_ASSERTION(accessNode, "Unable to QI to nsIAccessNode");
accessNode->GetDOMNode(getter_AddRefs(selectNode));
GetFocusedOptionNode(selectNode, getter_AddRefs(oldHTMLOptionNode));
nsCOMPtr<nsIDOMHTMLOptionElement> oldHTMLOption(do_QueryInterface(oldHTMLOptionNode));
if (oldHTMLOption)
oldHTMLOption->SetSelected(PR_FALSE);
// Set new selection
newHTMLOption->SetSelected(PR_TRUE);
// If combo box, and open, close it
// First, get the <select> widgets list control frame
nsCOMPtr<nsIDOMNode> testSelectNode;
nsCOMPtr<nsIDOMNode> thisNode(do_QueryInterface(mDOMNode));
do {
thisNode->GetParentNode(getter_AddRefs(testSelectNode));
nsCOMPtr<nsIDOMHTMLSelectElement> selectControl(do_QueryInterface(testSelectNode));
if (selectControl)
break;
thisNode = testSelectNode;
} while (testSelectNode);
nsCOMPtr<nsIPresShell> presShell(do_QueryReferent(mWeakShell));
nsCOMPtr<nsIContent> selectContent(do_QueryInterface(testSelectNode));
nsCOMPtr<nsIDOMHTMLOptionElement> option(do_QueryInterface(mDOMNode));
if (!testSelectNode || !selectContent || !presShell || !option)
return NS_ERROR_FAILURE;
nsIFrame *selectFrame = presShell->GetPrimaryFrameFor(selectContent);
nsIComboboxControlFrame *comboBoxFrame = nsnull;
CallQueryInterface(selectFrame, &comboBoxFrame);
if (comboBoxFrame) {
nsIFrame *listFrame = comboBoxFrame->GetDropDown();
if (comboBoxFrame->IsDroppedDown() && listFrame) {
// use this list control frame to roll up the list
nsIListControlFrame *listControlFrame = nsnull;
listFrame->QueryInterface(NS_GET_IID(nsIListControlFrame), (void**)&listControlFrame);
if (listControlFrame) {
PRInt32 newIndex = 0;
option->GetIndex(&newIndex);
listControlFrame->ComboboxFinish(newIndex);
}
}
}
return NS_OK;
}
return NS_ERROR_INVALID_ARG;
}
/**
* Helper method for getting the focused DOM Node from our parent(list) node. We
* need to use the frame to get the focused option because for some reason we
* weren't getting the proper notification when the focus changed using the DOM
*/
nsresult nsHTMLSelectOptionAccessible::GetFocusedOptionNode(nsIDOMNode *aListNode,
nsIDOMNode **aFocusedOptionNode)
{
*aFocusedOptionNode = nsnull;
NS_ASSERTION(aListNode, "Called GetFocusedOptionNode without a valid list node");
nsCOMPtr<nsIContent> content(do_QueryInterface(aListNode));
nsCOMPtr<nsIDocument> document = content->GetDocument();
nsIPresShell *shell = nsnull;
if (document)
shell = document->GetPrimaryShell();
if (!shell)
return NS_ERROR_FAILURE;
nsIFrame *frame = shell->GetPrimaryFrameFor(content);
if (!frame)
return NS_ERROR_FAILURE;
PRInt32 focusedOptionIndex = 0;
// Get options
nsCOMPtr<nsIDOMHTMLSelectElement> selectElement(do_QueryInterface(aListNode));
NS_ASSERTION(selectElement, "No select element where it should be");
nsCOMPtr<nsIDOMHTMLOptionsCollection> options;
nsresult rv = selectElement->GetOptions(getter_AddRefs(options));
if (NS_SUCCEEDED(rv)) {
nsIListControlFrame *listFrame = nsnull;
frame->QueryInterface(NS_GET_IID(nsIListControlFrame), (void**)&listFrame);
if (listFrame) {
// Get what's focused in listbox by asking frame for "selected item".
// Can't use dom interface for this, because it will always return the first selected item
// when there is more than 1 item selected. We need the focused item, not
// the first selected item.
focusedOptionIndex = listFrame->GetSelectedIndex();
if (focusedOptionIndex == -1) {
nsCOMPtr<nsIDOMNode> nextOption;
while (PR_TRUE) {
++ focusedOptionIndex;
options->Item(focusedOptionIndex, getter_AddRefs(nextOption));
nsCOMPtr<nsIDOMHTMLOptionElement> optionElement = do_QueryInterface(nextOption);
if (!optionElement) {
break;
}
PRBool disabled;
optionElement->GetDisabled(&disabled);
if (!disabled) {
break;
}
}
}
}
else // Combo boxes can only have 1 selected option, so they can use the dom interface for this
rv = selectElement->GetSelectedIndex(&focusedOptionIndex);
}
// Either use options and focused index, or default return null
if (NS_SUCCEEDED(rv) && options && focusedOptionIndex >= 0) { // Something is focused
rv = options->Item(focusedOptionIndex, aFocusedOptionNode);
}
return rv;
}
void nsHTMLSelectOptionAccessible::SelectionChangedIfOption(nsIContent *aPossibleOption)
{
if (!aPossibleOption || aPossibleOption->Tag() != nsAccessibilityAtoms::option ||
!aPossibleOption->IsNodeOfType(nsINode::eHTML)) {
return;
}
nsCOMPtr<nsIDOMNode> optionNode(do_QueryInterface(aPossibleOption));
NS_ASSERTION(optionNode, "No option node for nsIContent with option tag!");
nsCOMPtr<nsIAccessible> multiSelect = GetMultiSelectFor(optionNode);
nsCOMPtr<nsPIAccessible> privateMultiSelect = do_QueryInterface(multiSelect);
if (!privateMultiSelect) {
return;
}
nsCOMPtr<nsIAccessibilityService> accService =
do_GetService("@mozilla.org/accessibilityService;1");
nsCOMPtr<nsIAccessible> optionAccessible;
accService->GetAccessibleFor(optionNode, getter_AddRefs(optionAccessible));
if (!optionAccessible) {
return;
}
nsAccUtils::FireAccEvent(nsIAccessibleEvent::EVENT_SELECTION_WITHIN,
multiSelect);
PRUint32 state = State(optionAccessible);
PRUint32 eventType;
if (state & nsIAccessibleStates::STATE_SELECTED) {
eventType = nsIAccessibleEvent::EVENT_SELECTION_ADD;
}
else {
eventType = nsIAccessibleEvent::EVENT_SELECTION_REMOVE;
}
nsAccUtils::FireAccEvent(eventType, optionAccessible);
}
nsIContent* nsHTMLSelectOptionAccessible::GetSelectState(PRUint32* aState,
PRUint32* aExtraState)
{
nsCOMPtr<nsIContent> content(do_QueryInterface(mDOMNode));
while (content && content->Tag() != nsAccessibilityAtoms::select) {
content = content->GetParent();
}
nsCOMPtr<nsIDOMNode> selectNode(do_QueryInterface(content));
if (selectNode) {
nsCOMPtr<nsIAccessibilityService> accService = GetAccService();
if (accService) {
nsCOMPtr<nsIAccessible> selAcc;
accService->GetAccessibleFor(selectNode, getter_AddRefs(selAcc));
if (selAcc) {
selAcc->GetFinalState(aState, aExtraState);
return content;
}
}
}
return nsnull;
}
/** ----- nsHTMLSelectOptGroupAccessible ----- */
/** Default Constructor */
nsHTMLSelectOptGroupAccessible::nsHTMLSelectOptGroupAccessible(nsIDOMNode* aDOMNode, nsIWeakReference* aShell):
nsHTMLSelectOptionAccessible(aDOMNode, aShell)
{
}
NS_IMETHODIMP
nsHTMLSelectOptGroupAccessible::GetRole(PRUint32 *aRole)
{
*aRole = nsIAccessibleRole::ROLE_HEADING;
return NS_OK;
}
NS_IMETHODIMP
nsHTMLSelectOptGroupAccessible::GetState(PRUint32 *aState, PRUint32 *aExtraState)
{
nsresult rv = nsHTMLSelectOptionAccessible::GetState(aState, aExtraState);
NS_ENSURE_SUCCESS(rv, rv);
*aState &= ~(nsIAccessibleStates::STATE_FOCUSABLE |
nsIAccessibleStates::STATE_SELECTABLE);
return NS_OK;
}
NS_IMETHODIMP nsHTMLSelectOptGroupAccessible::DoAction(PRUint8 index)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP nsHTMLSelectOptGroupAccessible::GetActionName(PRUint8 aIndex, nsAString& aName)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP nsHTMLSelectOptGroupAccessible::GetNumActions(PRUint8 *_retval)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
void nsHTMLSelectOptGroupAccessible::CacheChildren()
{
if (!mWeakShell) {
// This node has been shut down
mAccChildCount = eChildCountUninitialized;
return;
}
if (mAccChildCount == eChildCountUninitialized) {
// XXX To do (bug 378612) - create text child for the anonymous attribute content, so that
// nsIAccessibleText is supported for the <optgroup> as it is for an <option>
// Attribute content is what layout creates for the label="foo" on the <optgroup>
// See eStyleContentType_Attr and CreateAttributeContent() in nsCSSFrameConstructor
mAccChildCount = 0;
SetFirstChild(nsnull);
}
}
/** ------------------------------------------------------ */
/** Finally, the Combobox widgets */
/** ------------------------------------------------------ */
/** ----- nsHTMLComboboxAccessible ----- */
nsHTMLComboboxAccessible::nsHTMLComboboxAccessible(nsIDOMNode* aDOMNode, nsIWeakReference* aShell):
nsAccessibleWrap(aDOMNode, aShell)
{
}
/** We are a combobox */
NS_IMETHODIMP nsHTMLComboboxAccessible::GetRole(PRUint32 *_retval)
{
*_retval = nsIAccessibleRole::ROLE_COMBOBOX;
return NS_OK;
}
void nsHTMLComboboxAccessible::CacheChildren()
{
if (!mWeakShell) {
// This node has been shut down
mAccChildCount = eChildCountUninitialized;
return;
}
if (mAccChildCount == eChildCountUninitialized) {
mAccChildCount = 0;
#ifdef COMBO_BOX_WITH_THREE_CHILDREN
// We no longer create textfield and button accessible, in order to have
// harmonization between IAccessible2, ATK/AT-SPI and OS X
nsHTMLComboboxTextFieldAccessible* textFieldAccessible =
new nsHTMLComboboxTextFieldAccessible(this, mDOMNode, mWeakShell);
SetFirstChild(textFieldAccessible);
if (!textFieldAccessible) {
return;
}
textFieldAccessible->SetParent(this);
textFieldAccessible->Init();
mAccChildCount = 1; // Textfield accessible child successfully added
nsHTMLComboboxButtonAccessible* buttonAccessible =
new nsHTMLComboboxButtonAccessible(mParent, mDOMNode, mWeakShell);
textFieldAccessible->SetNextSibling(buttonAccessible);
if (!buttonAccessible) {
return;
}
buttonAccessible->SetParent(this);
buttonAccessible->Init();
mAccChildCount = 2; // Button accessible child successfully added
#endif
nsIFrame *frame = GetFrame();
if (!frame) {
return;
}
nsIComboboxControlFrame *comboFrame = nsnull;
frame->QueryInterface(NS_GET_IID(nsIComboboxControlFrame), (void**)&comboFrame);
if (!comboFrame) {
return;
}
nsIFrame *listFrame = comboFrame->GetDropDown();
if (!listFrame) {
return;
}
if (!mListAccessible) {
mListAccessible =
new nsHTMLComboboxListAccessible(mParent, mDOMNode, mWeakShell);
}
#ifdef COMBO_BOX_WITH_THREE_CHILDREN
buttonAccessible->SetNextSibling(mListAccessible);
#else
SetFirstChild(mListAccessible);
#endif
if (!mListAccessible) {
return;
}
mListAccessible->SetParent(this);
mListAccessible->SetNextSibling(nsnull);
mListAccessible->Init();
++ mAccChildCount; // List accessible child successfully added
}
}
NS_IMETHODIMP nsHTMLComboboxAccessible::Shutdown()
{
nsAccessibleWrap::Shutdown();
if (mListAccessible) {
mListAccessible->Shutdown();
mListAccessible = nsnull;
}
return NS_OK;
}
/**
* As a nsHTMLComboboxAccessible we can have the following states:
* STATE_FOCUSED
* STATE_FOCUSABLE
* STATE_HASPOPUP
* STATE_EXPANDED
* STATE_COLLAPSED
*/
NS_IMETHODIMP
nsHTMLComboboxAccessible::GetState(PRUint32 *aState, PRUint32 *aExtraState)
{
// Get focus status from base class
nsresult rv = nsAccessible::GetState(aState, aExtraState);
NS_ENSURE_SUCCESS(rv, rv);
if (!mDOMNode)
return NS_OK;
nsIFrame *frame = GetBoundsFrame();
nsIComboboxControlFrame *comboFrame = nsnull;
if (frame) {
frame->QueryInterface(NS_GET_IID(nsIComboboxControlFrame), (void**)&comboFrame);
}
if (comboFrame && comboFrame->IsDroppedDown()) {
*aState |= nsIAccessibleStates::STATE_EXPANDED;
}
else {
*aState &= ~nsIAccessibleStates::STATE_FOCUSED; // Focus is on an option
*aState |= nsIAccessibleStates::STATE_COLLAPSED;
}
*aState |= nsIAccessibleStates::STATE_HASPOPUP |
nsIAccessibleStates::STATE_FOCUSABLE;
return NS_OK;
}
NS_IMETHODIMP nsHTMLComboboxAccessible::GetDescription(nsAString& aDescription)
{
aDescription.Truncate();
// First check to see if combo box itself has a description, perhaps through
// tooltip (title attribute) or via aria-describedby
nsAccessible::GetDescription(aDescription);
if (!aDescription.IsEmpty()) {
return NS_OK;
}
// Use description of currently focused option
nsCOMPtr<nsIAccessible> optionAccessible = GetFocusedOptionAccessible();
return optionAccessible ? optionAccessible->GetDescription(aDescription) : NS_OK;
}
already_AddRefed<nsIAccessible>
nsHTMLComboboxAccessible::GetFocusedOptionAccessible()
{
if (!mWeakShell) {
return nsnull; // Shut down
}
nsCOMPtr<nsIDOMNode> focusedOptionNode;
nsHTMLSelectOptionAccessible::GetFocusedOptionNode(mDOMNode, getter_AddRefs(focusedOptionNode));
nsIAccessibilityService *accService = GetAccService();
if (!focusedOptionNode || !accService) {
return nsnull;
}
nsIAccessible *optionAccessible;
accService->GetAccessibleInWeakShell(focusedOptionNode, mWeakShell,
&optionAccessible);
return optionAccessible;
}
/**
* MSAA/ATK accessible value != HTML value, especially not in combo boxes.
* Our accessible value is the text label for of our ( first ) selected child.
* The easiest way to get this is from the first child which is the readonly textfield.
*/
NS_IMETHODIMP nsHTMLComboboxAccessible::GetValue(nsAString& aValue)
{
// Use label of currently focused option
nsCOMPtr<nsIAccessible> optionAccessible = GetFocusedOptionAccessible();
NS_ENSURE_TRUE(optionAccessible, NS_ERROR_FAILURE);
return optionAccessible->GetName(aValue);
}
/** Just one action ( click ). */
NS_IMETHODIMP nsHTMLComboboxAccessible::GetNumActions(PRUint8 *aNumActions)
{
*aNumActions = 1;
return NS_OK;
}
/**
* Programmaticaly toggle the combo box
*/
NS_IMETHODIMP nsHTMLComboboxAccessible::DoAction(PRUint8 aIndex)
{
if (aIndex != nsHTMLComboboxAccessible::eAction_Click) {
return NS_ERROR_INVALID_ARG;
}
nsIFrame *frame = GetFrame();
if (!frame) {
return NS_ERROR_FAILURE;
}
nsIComboboxControlFrame *comboFrame = nsnull;
frame->QueryInterface(NS_GET_IID(nsIComboboxControlFrame), (void**)&comboFrame);
if (!comboFrame) {
return NS_ERROR_FAILURE;
}
// Reverse whether it's dropped down or not
comboFrame->ShowDropDown(!comboFrame->IsDroppedDown());
return NS_OK;
}
/**
* Our action name is the reverse of our state:
* if we are closed -> open is our name.
* if we are open -> closed is our name.
* Uses the frame to get the state, updated on every click
*/
NS_IMETHODIMP nsHTMLComboboxAccessible::GetActionName(PRUint8 aIndex, nsAString& aName)
{
if (aIndex != nsHTMLComboboxAccessible::eAction_Click) {
return NS_ERROR_INVALID_ARG;
}
nsIFrame *frame = GetFrame();
if (!frame) {
return NS_ERROR_FAILURE;
}
nsIComboboxControlFrame *comboFrame = nsnull;
frame->QueryInterface(NS_GET_IID(nsIComboboxControlFrame), (void**)&comboFrame);
if (!comboFrame) {
return NS_ERROR_FAILURE;
}
if (comboFrame->IsDroppedDown())
aName.AssignLiteral("close");
else
aName.AssignLiteral("open");
return NS_OK;
}
#ifdef COMBO_BOX_WITH_THREE_CHILDREN
/** ----- nsHTMLComboboxTextFieldAccessible ----- */
/** Constructor */
nsHTMLComboboxTextFieldAccessible::nsHTMLComboboxTextFieldAccessible(nsIAccessible* aParent,
nsIDOMNode* aDOMNode,
nsIWeakReference* aShell):
nsHTMLTextFieldAccessible(aDOMNode, aShell)
{
}
NS_IMETHODIMP nsHTMLComboboxTextFieldAccessible::GetUniqueID(void **aUniqueID)
{
// Since mDOMNode is same as for our parent, use |this| pointer as the unique Id
*aUniqueID = static_cast<void*>(this);
return NS_OK;
}
/**
* Gets the bounds for the BlockFrame.
* Walks the Frame tree and checks for proper frames.
*/
void nsHTMLComboboxTextFieldAccessible::GetBoundsRect(nsRect& aBounds, nsIFrame** aBoundingFrame)
{
// get our first child's frame
nsIFrame* frame = nsAccessible::GetBoundsFrame();
if (!frame)
return;
frame = frame->GetFirstChild(nsnull);
*aBoundingFrame = frame;
aBounds = frame->GetRect();
}
void nsHTMLComboboxTextFieldAccessible::CacheChildren()
{
// Allow single text anonymous child, so that nsHyperTextAccessible can operate correctly
// We must override this otherwise we get the dropdown button as a child of the textfield,
// and at least for now we want to keep it as a sibling
if (!mWeakShell) {
// This node has been shut down
mAccChildCount = eChildCountUninitialized;
return;
}
// Allows only 1 child
if (mAccChildCount == eChildCountUninitialized) {
mAccChildCount = 0; // Prevent reentry
nsAccessibleTreeWalker walker(mWeakShell, mDOMNode, PR_TRUE);
// Seed the frame hint early while we're still on a container node.
// This is better than doing the GetPrimaryFrameFor() later on
// a text node, because text nodes aren't in the frame map.
walker.mState.frame = GetFrame();
walker.GetFirstChild();
SetFirstChild(walker.mState.accessible);
nsCOMPtr<nsPIAccessible> privateChild =
do_QueryInterface(walker.mState.accessible);
privateChild->SetParent(this);
privateChild->SetNextSibling(nsnull);
mAccChildCount = 1;
}
}
/** -----ComboboxButtonAccessible ----- */
/** Constructor -- cache our parent */
nsHTMLComboboxButtonAccessible::nsHTMLComboboxButtonAccessible(nsIAccessible* aParent,
nsIDOMNode* aDOMNode,
nsIWeakReference* aShell):
nsLeafAccessible(aDOMNode, aShell)
{
}
/** Just one action ( click ). */
NS_IMETHODIMP nsHTMLComboboxButtonAccessible::GetNumActions(PRUint8 *aNumActions)
{
*aNumActions = 1;
return NS_OK;
}
/**
* Programmaticaly click on the button, causing either the display or
* the hiding of the drop down box ( window ).
* Walks the Frame tree and checks for proper frames.
*/
NS_IMETHODIMP nsHTMLComboboxButtonAccessible::DoAction(PRUint8 aIndex)
{
nsIFrame* frame = nsAccessible::GetBoundsFrame();
nsPresContext *context = GetPresContext();
if (!frame || !context)
return NS_ERROR_FAILURE;
frame = frame->GetFirstChild(nsnull)->GetNextSibling();
// We only have one action, click. Any other index is meaningless(wrong)
if (aIndex == eAction_Click) {
nsCOMPtr<nsIDOMHTMLInputElement>
element(do_QueryInterface(frame->GetContent()));
if (element)
{
element->Click();
return NS_OK;
}
return NS_ERROR_FAILURE;
}
return NS_ERROR_INVALID_ARG;
}
/**
* Our action name is the reverse of our state:
* if we are closed -> open is our name.
* if we are open -> closed is our name.
* Uses the frame to get the state, updated on every click
*/
NS_IMETHODIMP nsHTMLComboboxButtonAccessible::GetActionName(PRUint8 aIndex, nsAString& aName)
{
nsIFrame *boundsFrame = GetBoundsFrame();
nsIComboboxControlFrame* comboFrame;
boundsFrame->QueryInterface(NS_GET_IID(nsIComboboxControlFrame), (void**)&comboFrame);
if (!comboFrame)
return NS_ERROR_FAILURE;
if (comboFrame->IsDroppedDown())
aName.AssignLiteral("close");
else
aName.AssignLiteral("open");
return NS_OK;
}
NS_IMETHODIMP nsHTMLComboboxButtonAccessible::GetUniqueID(void **aUniqueID)
{
// Since mDOMNode is same for all tree item, use |this| pointer as the unique Id
*aUniqueID = static_cast<void*>(this);
return NS_OK;
}
/**
* Gets the bounds for the gfxButtonControlFrame.
* Walks the Frame tree and checks for proper frames.
*/
void nsHTMLComboboxButtonAccessible::GetBoundsRect(nsRect& aBounds, nsIFrame** aBoundingFrame)
{
// get our second child's frame
// bounding frame is the ComboboxControlFrame
nsIFrame *frame = nsAccessible::GetBoundsFrame();
*aBoundingFrame = frame;
nsPresContext *context = GetPresContext();
if (!frame || !context)
return;
aBounds = frame->GetFirstChild(nsnull)->GetNextSibling()->GetRect();
// sibling frame is for the button
}
/** We are a button. */
NS_IMETHODIMP nsHTMLComboboxButtonAccessible::GetRole(PRUint32 *_retval)
{
*_retval = nsIAccessibleRole::ROLE_PUSHBUTTON;
return NS_OK;
}
/** Return our cached parent */
NS_IMETHODIMP nsHTMLComboboxButtonAccessible::GetParent(nsIAccessible **aParent)
{
NS_IF_ADDREF(*aParent = mParent);
return NS_OK;
}
/**
* Gets the name from GetActionName()
*/
NS_IMETHODIMP nsHTMLComboboxButtonAccessible::GetName(nsAString& aName)
{
return GetActionName(eAction_Click, aName);
}
/**
* As a nsHTMLComboboxButtonAccessible we can have the following states:
* STATE_PRESSED
* STATE_FOCUSED
* STATE_FOCUSABLE
* STATE_INVISIBLE
*/
NS_IMETHODIMP
nsHTMLComboboxButtonAccessible::GetState(PRUint32 *aState, PRUint32 *aExtraState)
{
// Get focus status from base class
nsresult rv = nsAccessible::GetState(aState, aExtraState);
NS_ENSURE_SUCCESS(rv, rv);
if (!mDOMNode)
return NS_OK;
nsIFrame *boundsFrame = GetBoundsFrame();
nsIComboboxControlFrame* comboFrame = nsnull;
if (boundsFrame)
boundsFrame->QueryInterface(NS_GET_IID(nsIComboboxControlFrame), (void**)&comboFrame);
if (!comboFrame) {
*aState |= nsIAccessibleStates::STATE_INVISIBLE;
}
else {
*aState |= nsIAccessibleStates::STATE_FOCUSABLE;
if (comboFrame->IsDroppedDown()) {
*aState |= nsIAccessibleStates::STATE_PRESSED;
}
}
return NS_OK;
}
#endif
/** ----- nsHTMLComboboxListAccessible ----- */
nsHTMLComboboxListAccessible::nsHTMLComboboxListAccessible(nsIAccessible *aParent,
nsIDOMNode* aDOMNode,
nsIWeakReference* aShell):
nsHTMLSelectListAccessible(aDOMNode, aShell)
{
}
nsIFrame *nsHTMLComboboxListAccessible::GetFrame()
{
nsIFrame* frame = nsHTMLSelectListAccessible::GetFrame();
if (frame) {
nsIComboboxControlFrame* comboBox;
CallQueryInterface(frame, &comboBox);
if (comboBox) {
return comboBox->GetDropDown();
}
}
return nsnull;
}
/**
* As a nsHTMLComboboxListAccessible we can have the following states:
* STATE_FOCUSED
* STATE_FOCUSABLE
* STATE_INVISIBLE
* STATE_FLOATING
*/
NS_IMETHODIMP
nsHTMLComboboxListAccessible::GetState(PRUint32 *aState, PRUint32 *aExtraState)
{
// Get focus status from base class
nsresult rv = nsAccessible::GetState(aState, aExtraState);
NS_ENSURE_SUCCESS(rv, rv);
if (!mDOMNode)
return NS_OK;
nsIFrame *boundsFrame = GetBoundsFrame();
nsIComboboxControlFrame* comboFrame = nsnull;
if (boundsFrame)
boundsFrame->QueryInterface(NS_GET_IID(nsIComboboxControlFrame), (void**)&comboFrame);
if (comboFrame && comboFrame->IsDroppedDown())
*aState |= nsIAccessibleStates::STATE_FLOATING;
else
*aState |= nsIAccessibleStates::STATE_INVISIBLE;
return NS_OK;
}
/** Return our cached parent */
NS_IMETHODIMP nsHTMLComboboxListAccessible::GetParent(nsIAccessible **aParent)
{
NS_IF_ADDREF(*aParent = mParent);
return NS_OK;
}
NS_IMETHODIMP nsHTMLComboboxListAccessible::GetUniqueID(void **aUniqueID)
{
// Since mDOMNode is same for all tree item, use |this| pointer as the unique Id
*aUniqueID = static_cast<void*>(this);
return NS_OK;
}
/**
* Gets the bounds for the areaFrame.
* Walks the Frame tree and checks for proper frames.
*/
void nsHTMLComboboxListAccessible::GetBoundsRect(nsRect& aBounds, nsIFrame** aBoundingFrame)
{
*aBoundingFrame = nsnull;
nsCOMPtr<nsIAccessible> comboAccessible;
GetParent(getter_AddRefs(comboAccessible));
if (!comboAccessible) {
return;
}
if (0 == (State(comboAccessible) & nsIAccessibleStates::STATE_COLLAPSED)) {
nsHTMLSelectListAccessible::GetBoundsRect(aBounds, aBoundingFrame);
return;
}
// get our first option
nsCOMPtr<nsIDOMNode> child;
mDOMNode->GetFirstChild(getter_AddRefs(child));
// now get its frame
nsCOMPtr<nsIPresShell> shell = GetPresShell();
if (!shell) {
return;
}
nsCOMPtr<nsIContent> content(do_QueryInterface(child));
if (!content) {
return;
}
nsIFrame* frame = shell->GetPrimaryFrameFor(content);
if (!frame) {
*aBoundingFrame = nsnull;
return;
}
*aBoundingFrame = frame->GetParent();
aBounds = (*aBoundingFrame)->GetRect();
}
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