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Mozilla/mozilla/accessible/src/html/nsHTMLSelectAccessible.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape 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/NPL/
*
* 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.
*
* Original Author: Eric Vaughan (evaughan@netscape.com)
*
* Contributor(s):
* Kyle Yuan (kyle.yuan@sun.com)
*
* Alternatively, the contents of this file may be used under the terms of
* either 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 NPL, 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 NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsCOMPtr.h"
#include "nsGUIEvent.h"
#include "nsHTMLSelectAccessible.h"
#include "nsIAccessibilityService.h"
#include "nsIFrame.h"
#include "nsIComboboxControlFrame.h"
#include "nsIDocument.h"
#include "nsIDOMDocumentEvent.h"
#include "nsIDOMEventReceiver.h"
#include "nsIDOMHTMLCollection.h"
#include "nsIDOMHTMLInputElement.h"
#include "nsIDOMHTMLOptionElement.h"
#include "nsIDOMHTMLOptGroupElement.h"
#include "nsIDOMHTMLSelectElement.h"
#include "nsIListControlFrame.h"
#include "nsIOptionElement.h"
#include "nsISelectControlFrame.h"
#include "nsIServiceManager.h"
#include "nsIWidget.h"
#include "nsLayoutAtoms.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. Some of them
* extend classes from nsSelectAccessible.cpp, which contains base classes
* that are also extended by the XUL Select Accessibility support.
*
* Listbox:
* - nsHTMLListboxAccessible
* - nsHTMLSelectListAccessible
* - nsHTMLSelectOptionAccessible
*
* Comboboxes:
* - nsHTMLComboboxAccessilbe
* - nsHTMLComboboxTextFieldAccessible
* - nsHTMLComboboxButtonAccessible
* - nsHTMLComboboxWindowAccessilbe
* - nsHTMLSelectListAccessible
* - nsHTMLSelectOptionAccessible
*/
/** ------------------------------------------------------ */
/** Impl. of nsHTMLSelectableAccessible */
/** ------------------------------------------------------ */
// Helper class
nsHTMLSelectableAccessible::iterator::iterator(nsHTMLSelectableAccessible *aParent) : mParent(aParent)
{
mLength = mIndex = 0;
mSelCount = 0;
nsCOMPtr<nsIDOMHTMLSelectElement> htmlSelect(do_QueryInterface(mParent->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,
nsISupportsArray *aSelectedAccessibles,
nsIPresContext *aContext)
{
PRBool isSelected = PR_FALSE;
nsCOMPtr<nsIAccessible> tempAccess;
if (mOption) {
mOption->GetSelected(&isSelected);
if (isSelected)
aAccService->CreateHTMLSelectOptionAccessible(mOption, mParent, aContext, getter_AddRefs(tempAccess));
}
if (tempAccess)
aSelectedAccessibles->AppendElement(tempAccess);
}
PRBool nsHTMLSelectableAccessible::iterator::GetAccessibleIfSelected(PRInt32 aIndex,
nsIAccessibilityService *aAccService,
nsIPresContext *aContext,
nsIAccessible **_retval)
{
PRBool isSelected = PR_FALSE;
nsCOMPtr<nsIAccessible> tempAccess;
*_retval = nsnull;
if (mOption) {
mOption->GetSelected(&isSelected);
if (isSelected) {
if (mSelCount == aIndex) {
aAccService->CreateHTMLSelectOptionAccessible(mOption, mParent, aContext, getter_AddRefs(tempAccess));
*_retval = tempAccess;
NS_IF_ADDREF(*_retval);
return PR_TRUE;
}
mSelCount++;
}
}
return PR_FALSE;
}
void nsHTMLSelectableAccessible::iterator::Select(PRBool aSelect)
{
if (mOption)
mOption->SetSelected(aSelect);
}
nsHTMLSelectableAccessible::nsHTMLSelectableAccessible(nsIDOMNode* aDOMNode,
nsIWeakReference* aShell):
nsAccessible(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<nsIDOMHTMLCollection> 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);
if (eSelection_Add == aMethod && !(*aSelState))
tempOption->SetSelected(PR_TRUE);
else if (eSelection_Remove == aMethod && (*aSelState))
tempOption->SetSelected(PR_FALSE);
return NS_OK;
}
// Interface methods
NS_IMETHODIMP nsHTMLSelectableAccessible::GetSelectedChildren(nsISupportsArray **_retval)
{
*_retval = nsnull;
nsCOMPtr<nsIAccessibilityService> accService(do_GetService("@mozilla.org/accessibilityService;1"));
if (!accService)
return NS_ERROR_FAILURE;
nsCOMPtr<nsISupportsArray> selectedAccessibles;
NS_NewISupportsArray(getter_AddRefs(selectedAccessibles));
if (!selectedAccessibles)
return NS_ERROR_OUT_OF_MEMORY;
nsCOMPtr<nsIPresContext> context;
GetPresContext(context);
if (!context)
return NS_ERROR_FAILURE;
nsHTMLSelectableAccessible::iterator iter(this);
while (iter.Advance())
iter.AddAccessibleIfSelected(accService, selectedAccessibles, context);
PRUint32 uLength = 0;
selectedAccessibles->Count(&uLength);
if (uLength != 0) { // length of nsISupportsArray 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;
nsCOMPtr<nsIPresContext> context;
GetPresContext(context);
if (!context)
return NS_ERROR_FAILURE;
nsHTMLSelectableAccessible::iterator iter(this);
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);
while (iter.Advance())
iter.CalcSelectionCount(aSelectionCount);
return NS_OK;
}
NS_IMETHODIMP nsHTMLSelectableAccessible::AddSelection(PRInt32 aIndex)
{
PRBool isSelected;
return ChangeSelection(aIndex, eSelection_Add, &isSelected);
}
NS_IMETHODIMP nsHTMLSelectableAccessible::RemoveSelection(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);
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);
while (iter.Advance())
iter.Select(PR_TRUE);
}
return NS_OK;
}
/** ------------------------------------------------------ */
/** First, the common widgets */
/** ------------------------------------------------------ */
/** ----- nsHTMLSelectListAccessible ----- */
/** Default Constructor */
nsHTMLSelectListAccessible::nsHTMLSelectListAccessible(nsIAccessible* aParent,
nsIDOMNode* aDOMNode,
nsIWeakReference* aShell)
:nsSelectListAccessible(aParent, aDOMNode, aShell)
{
}
/**
* As a nsHTMLSelectListAccessible we can have the following states:
* STATE_MULTISELECTABLE
* STATE_EXTSELECTABLE
*/
NS_IMETHODIMP nsHTMLSelectListAccessible::GetAccState(PRUint32 *_retval)
{
nsCOMPtr<nsIDOMHTMLSelectElement> select (do_QueryInterface(mDOMNode));
if ( select ) {
PRBool multiple;
select->GetMultiple(&multiple);
if ( multiple )
*_retval |= STATE_MULTISELECTABLE | STATE_EXTSELECTABLE;
}
return NS_OK;
}
/**
* Gets the last child of the DOM node and creates and returns
* a nsHTMLSelectOptionAccessible.
*/
NS_IMETHODIMP nsHTMLSelectListAccessible::GetAccLastChild(nsIAccessible **_retval)
{
nsCOMPtr<nsIDOMNode> last;
mDOMNode->GetLastChild(getter_AddRefs(last));
*_retval = new nsHTMLSelectOptionAccessible(this, last, mPresShell);
if ( ! *_retval )
return NS_ERROR_FAILURE;
NS_ADDREF(*_retval);
return NS_OK;
}
/**
* Gets the 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.
*/
NS_IMETHODIMP nsHTMLSelectListAccessible::GetAccChildCount(PRInt32 *aAccChildCount)
{
// Count the number of <Option Group> and <option> elements and return
// this number. This is so the tree can be flattened
nsCOMPtr<nsIDOMNode> next, nextInner, nextChild;
nsCOMPtr<nsIDOMHTMLOptionElement> optionElement(do_QueryInterface(mDOMNode));
nsCOMPtr<nsIAccessibilityService> accService(do_GetService("@mozilla.org/accessibilityService;1"));
PRInt32 countChild;
countChild = 0;
mDOMNode->GetFirstChild(getter_AddRefs(next));
while (next) {
nsCOMPtr<nsIDOMHTMLOptGroupElement> optGroupElement(do_QueryInterface(next));
countChild++;
if (optGroupElement) {
next->GetFirstChild(getter_AddRefs(nextInner));
while (nextInner ) {
nsCOMPtr<nsIDOMHTMLOptionElement> optionElement(do_QueryInterface(nextInner));
if (optionElement) {
countChild++;
}
nextInner->GetNextSibling(getter_AddRefs(nextChild));
nextInner = nextChild;
} // endWhile nextInner
} // endif optGroupElement
next->GetNextSibling(getter_AddRefs(nextInner));
next = nextInner;
} // endWhile next
*aAccChildCount = countChild;
return NS_OK;
}
/** ----- nsHTMLSelectOptionAccessible ----- */
/** Default Constructor */
nsHTMLSelectOptionAccessible::nsHTMLSelectOptionAccessible(nsIAccessible* aParent, nsIDOMNode* aDOMNode, nsIWeakReference* aShell):
nsSelectOptionAccessible(aParent, aDOMNode, aShell)
{
}
/**
* Gets the next accessible sibling of the mDOMNode and creates and returns
* a nsHTMLSelectOptionAccessible or nsHTMLSelectOptGroupAccessible.
*/
NS_IMETHODIMP nsHTMLSelectOptionAccessible::GetAccNextSibling(nsIAccessible **_retval)
{
// Get next sibling and if found create and return an accessible for it
// When getting the next sibling of an SelectOption we could be working with
// either an optgroup or an option. We process this tree as flat.
*_retval = nsnull;
nsCOMPtr<nsIDOMNode> next = mDOMNode, currentNode;
nsCOMPtr<nsIAccessibilityService> accService(do_GetService("@mozilla.org/accessibilityService;1"));
while (!*_retval && next) {
currentNode = next;
next = nsnull;
nsCOMPtr<nsIDOMHTMLOptGroupElement> currOptGroupElement(do_QueryInterface(currentNode));
if (currOptGroupElement) {
currentNode->GetFirstChild(getter_AddRefs(next));
}
if (!next) // no child under a <optgroup> or we started with a <option>
currentNode->GetNextSibling(getter_AddRefs(next)); // See if there is another <optgroup>
if (next) {
accService->GetAccessibleFor(next, _retval);
continue;
}
// else No child then or child is not a <option> nor an <optgroup>
// go back up to the parent and get next sibling from there,
nsCOMPtr<nsIDOMNode> parent, parentNextSib;
currentNode->GetParentNode(getter_AddRefs(parent));
if (!parent)
return NS_OK;
nsCOMPtr<nsIDOMNode> selectNode;
mParent->AccGetDOMNode(getter_AddRefs(selectNode));
if (parent == selectNode)
return NS_OK; // End search for options at subtree's start
parent->GetNextSibling(getter_AddRefs(next));
if (!next)
return NS_OK; // done
// We have a parent that is an option or option group
// get accessible for either one and return it
accService->GetAccessibleFor(next, _retval);
}
return NS_OK;
}
/**
* Gets the previous accessible sibling of the mDOMNode and creates and returns
* a nsHTMLSelectOptionAccessible or nsHTMLSelectOptGroupAccessible.
*/
NS_IMETHODIMP nsHTMLSelectOptionAccessible::GetAccPreviousSibling(nsIAccessible **_retval)
{
*_retval = nsnull;
nsCOMPtr<nsIAccessibilityService> accService(do_GetService("@mozilla.org/accessibilityService;1"));
nsCOMPtr<nsIAccessible> thisAcc, selectListAcc, nextSiblingAcc;
accService->GetAccessibleFor(mDOMNode, getter_AddRefs(thisAcc));
// The accessible parent of an <option> or <optgroup> is always the SelectListAcc - see GetAccessibleFor()
thisAcc->GetAccParent(getter_AddRefs(selectListAcc));
if (!selectListAcc) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIDOMNode> siblingDOMNode;
selectListAcc->GetAccFirstChild(_retval);
// Go thru all the siblings until we find ourselves(mDOMNode) then use the
// sibling right before us.
do {
(*_retval)->GetAccNextSibling(getter_AddRefs(nextSiblingAcc));
if (!nextSiblingAcc) {
*_retval = nsnull;
return NS_ERROR_FAILURE;
}
nextSiblingAcc->AccGetDOMNode(getter_AddRefs(siblingDOMNode));
if (siblingDOMNode == mDOMNode) {
break; // we found ourselves!
}
NS_RELEASE(*_retval);
*_retval = nextSiblingAcc;
NS_IF_ADDREF(*_retval);
} while (nextSiblingAcc);
return NS_OK;
}
/**
* As a nsHTMLSelectOptionAccessible we can have the following states:
* STATE_SELECTABLE
* STATE_SELECTED
* STATE_FOCUSED
* STATE_FOCUSABLE
* STATE_INVISIBLE -- not implemented yet
*/
NS_IMETHODIMP nsHTMLSelectOptionAccessible::GetAccState(PRUint32 *_retval)
{
*_retval = 0;
nsCOMPtr<nsIDOMNode> focusedOptionNode, parentNode;
// Go up to parent <select> element
nsCOMPtr<nsIDOMNode> thisNode(do_QueryInterface(mDOMNode));
do {
thisNode->GetParentNode(getter_AddRefs(parentNode));
nsCOMPtr<nsIDOMHTMLSelectElement> selectControl(do_QueryInterface(parentNode));
if (selectControl) {
break;
}
thisNode = parentNode;
} while (parentNode);
if (!parentNode) {
return NS_ERROR_FAILURE;
}
// find out if we are the focused node
GetFocusedOptionNode(parentNode, focusedOptionNode);
if (focusedOptionNode == mDOMNode)
*_retval |= STATE_FOCUSED;
// Are we selected?
nsCOMPtr<nsIDOMHTMLOptionElement> option (do_QueryInterface(mDOMNode));
if ( option ) {
PRBool isSelected = PR_FALSE;
option->GetSelected(&isSelected);
if ( isSelected )
*_retval |= STATE_SELECTED;
}
*_retval |= STATE_SELECTABLE | STATE_FOCUSABLE;
return NS_OK;
}
/** select us! close combo box if necessary*/
NS_IMETHODIMP nsHTMLSelectOptionAccessible::GetAccActionName(PRUint8 index, nsAString& _retval)
{
if (index == eAction_Select) {
nsAccessible::GetTranslatedString(NS_LITERAL_STRING("select"), _retval);
return NS_OK;
}
return NS_ERROR_INVALID_ARG;
}
NS_IMETHODIMP nsHTMLSelectOptionAccessible::GetAccNumActions(PRUint8 *_retval)
{
*_retval = eSingle_Action;
return NS_OK;
}
NS_IMETHODIMP nsHTMLSelectOptionAccessible::AccDoAction(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;
mParent->AccGetDOMNode(getter_AddRefs(selectNode));
nsHTMLSelectOptionAccessible::GetFocusedOptionNode(selectNode, 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(mPresShell));
nsCOMPtr<nsIContent> selectContent(do_QueryInterface(testSelectNode));
nsCOMPtr<nsIDOMHTMLOptionElement> option(do_QueryInterface(mDOMNode));
if (!testSelectNode || !selectContent || !presShell || !option)
return NS_ERROR_FAILURE;
nsIFrame *selectFrame = nsnull;
presShell->GetPrimaryFrameFor(selectContent, &selectFrame);
nsIComboboxControlFrame *comboBoxFrame = nsnull;
selectFrame->QueryInterface(NS_GET_IID(nsIComboboxControlFrame), (void**)&comboBoxFrame);
if (comboBoxFrame) {
nsIFrame *listFrame = nsnull;
comboBoxFrame->GetDropDown(&listFrame);
PRBool isDroppedDown;
comboBoxFrame->IsDroppedDown(&isDroppedDown);
if (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,
nsCOMPtr<nsIDOMNode>& aFocusedOptionNode)
{
NS_ASSERTION(aListNode, "Called GetFocusedOptionNode without a valid list node");
nsCOMPtr<nsIContent> content(do_QueryInterface(aListNode));
nsCOMPtr<nsIDocument> document;
content->GetDocument(*getter_AddRefs(document));
nsCOMPtr<nsIPresShell> shell;
if (document)
document->GetShellAt(0,getter_AddRefs(shell));
if (!shell)
return NS_ERROR_FAILURE;
nsIFrame *frame = nsnull;
shell->GetPrimaryFrameFor(content, &frame);
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<nsIDOMHTMLCollection> 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.
rv = listFrame->GetSelectedIndex(&focusedOptionIndex);
}
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 to list node itself
if (NS_SUCCEEDED(rv) && options && focusedOptionIndex >= 0) // Something is focused
rv = options->Item(focusedOptionIndex, getter_AddRefs(aFocusedOptionNode));
else { // If no options in list or focusedOptionIndex <0, then we are not focused on an item
aFocusedOptionNode = aListNode; // return normal target content
rv = NS_OK;
}
return rv;
}
/** ----- nsHTMLSelectOptGroupAccessible ----- */
/** Default Constructor */
nsHTMLSelectOptGroupAccessible::nsHTMLSelectOptGroupAccessible(nsIAccessible* aParent, nsIDOMNode* aDOMNode, nsIWeakReference* aShell):
nsHTMLSelectOptionAccessible(aParent, aDOMNode, aShell)
{
}
/**
* As a nsHTMLSelectOptGroupAccessible we can have the following states:
* STATE_SELECTABLE
*/
NS_IMETHODIMP nsHTMLSelectOptGroupAccessible::GetAccState(PRUint32 *_retval)
{
nsHTMLSelectOptionAccessible::GetAccState(_retval);
*_retval &= ~(STATE_FOCUSABLE|STATE_SELECTABLE);
return NS_OK;
}
NS_IMETHODIMP nsHTMLSelectOptGroupAccessible::AccDoAction(PRUint8 index)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP nsHTMLSelectOptGroupAccessible::GetAccActionName(PRUint8 index, nsAString& _retval)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP nsHTMLSelectOptGroupAccessible::GetAccNumActions(PRUint8 *_retval)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
/** ------------------------------------------------------ */
/** Secondly, the Listbox widget */
/** ------------------------------------------------------ */
/** ----- nsHTMLListboxAccessible ----- */
/** Constructor */
nsHTMLListboxAccessible::nsHTMLListboxAccessible(nsIDOMNode* aDOMNode, nsIWeakReference* aShell):
nsHTMLSelectableAccessible(aDOMNode, aShell)
{
}
/** We are a window, as far as MSAA is concerned */
NS_IMETHODIMP nsHTMLListboxAccessible::GetAccRole(PRUint32 *_retval)
{
*_retval = ROLE_WINDOW;
return NS_OK;
}
/**
* We always have 1 child: a subclass of nsSelectListAccessible.
*/
NS_IMETHODIMP nsHTMLListboxAccessible::GetAccChildCount(PRInt32 *_retval)
{
*_retval = 1;
return NS_OK;
}
/**
* As a nsHTMLListboxAccessible we can have the following states:
* STATE_FOCUSED
* STATE_READONLY
* STATE_FOCUSABLE
*/
NS_IMETHODIMP nsHTMLListboxAccessible::GetAccState(PRUint32 *_retval)
{
// Get focus status from base class
nsAccessible::GetAccState(_retval);
*_retval |= STATE_READONLY | STATE_FOCUSABLE;
return NS_OK;
}
/**
* Our last (and only) child is an nsHTMLSelectListAccessible object
*/
NS_IMETHODIMP nsHTMLListboxAccessible::GetAccLastChild(nsIAccessible **_retval)
{
*_retval = new nsHTMLSelectListAccessible(this, mDOMNode, mPresShell);
if ( ! *_retval )
return NS_ERROR_FAILURE;
NS_ADDREF(*_retval);
return NS_OK;
}
/**
* Our first (and only) child is an nsHTMLSelectListAccessible object
*/
NS_IMETHODIMP nsHTMLListboxAccessible::GetAccFirstChild(nsIAccessible **_retval)
{
*_retval = new nsHTMLSelectListAccessible(this, mDOMNode, mPresShell);
if ( ! *_retval )
return NS_ERROR_FAILURE;
NS_ADDREF(*_retval);
return NS_OK;
}
/**
* Our value is the value of our ( first ) selected child. nsIDOMHTMLSelectElement
* returns this by default with GetValue().
*/
NS_IMETHODIMP nsHTMLListboxAccessible::GetAccValue(nsAString& _retval)
{
nsCOMPtr<nsIDOMHTMLSelectElement> select (do_QueryInterface(mDOMNode));
if ( select ) {
select->GetValue(_retval);
return NS_OK;
}
return NS_ERROR_FAILURE;
}
/** ------------------------------------------------------ */
/** Finally, the Combobox widgets */
/** ------------------------------------------------------ */
/** ----- nsHTMLComboboxAccessible ----- */
nsHTMLComboboxAccessible::nsHTMLComboboxAccessible(nsIDOMNode* aDOMNode, nsIWeakReference* aShell):
nsHTMLSelectableAccessible(aDOMNode, aShell)
{
}
/** We are a combobox */
NS_IMETHODIMP nsHTMLComboboxAccessible::GetAccRole(PRUint32 *_retval)
{
*_retval = ROLE_COMBOBOX;
return NS_OK;
}
/**
* We always have 3 children: TextField, Button, Window. In that order
*/
NS_IMETHODIMP nsHTMLComboboxAccessible::GetAccChildCount(PRInt32 *_retval)
{
*_retval = 3;
return NS_OK;
}
/**
* As a nsComboboxAccessible we can have the following states:
* STATE_FOCUSED
* STATE_READONLY
* STATE_FOCUSABLE
* STATE_HASPOPUP
* STATE_EXPANDED
* STATE_COLLAPSED
*/
NS_IMETHODIMP nsHTMLComboboxAccessible::GetAccState(PRUint32 *_retval)
{
// Get focus status from base class
nsAccessible::GetAccState(_retval);
// we are open or closed
PRBool isOpen = PR_FALSE;
nsIFrame *frame = GetBoundsFrame();
nsIComboboxControlFrame *comboFrame = nsnull;
frame->QueryInterface(NS_GET_IID(nsIComboboxControlFrame), (void**)&comboFrame);
if (comboFrame)
comboFrame->IsDroppedDown(&isOpen);
*_retval |= isOpen ? STATE_EXPANDED : STATE_COLLAPSED;
*_retval |= STATE_HASPOPUP | STATE_READONLY | STATE_FOCUSABLE;
return NS_OK;
}
/**
* Our last child is an nsHTMLComboboxWindowAccessible object
*/
NS_IMETHODIMP nsHTMLComboboxAccessible::GetAccLastChild(nsIAccessible **_retval)
{
*_retval = new nsHTMLComboboxWindowAccessible(this, mDOMNode, mPresShell);
if (! *_retval)
return NS_ERROR_FAILURE;
NS_ADDREF(*_retval);
return NS_OK;
}
/**
* Our last child is an nsHTMLComboboxTextFieldAccessible object
*/
NS_IMETHODIMP nsHTMLComboboxAccessible::GetAccFirstChild(nsIAccessible **_retval)
{
*_retval = new nsHTMLComboboxTextFieldAccessible(this, mDOMNode, mPresShell);
if (! *_retval)
return NS_ERROR_FAILURE;
NS_ADDREF(*_retval);
return NS_OK;
}
/**
* Our value is the value of our ( first ) selected child. nsIDOMHTMLSelectElement
* returns this by default with GetValue().
*/
NS_IMETHODIMP nsHTMLComboboxAccessible::GetAccValue(nsAString& _retval)
{
nsCOMPtr<nsIDOMHTMLSelectElement> select (do_QueryInterface(mDOMNode));
if (select) {
select->GetValue(_retval);
return NS_OK;
}
return NS_ERROR_FAILURE;
}
/** ----- nsHTMLComboboxTextFieldAccessible ----- */
/** Constructor */
nsHTMLComboboxTextFieldAccessible::nsHTMLComboboxTextFieldAccessible(nsIAccessible* aParent,
nsIDOMNode* aDOMNode,
nsIWeakReference* aShell):
nsComboboxTextFieldAccessible(aParent, aDOMNode, aShell)
{
}
/**
* Our next sibling is an nsHTMLComboboxButtonAccessible object
*/
NS_IMETHODIMP nsHTMLComboboxTextFieldAccessible::GetAccNextSibling(nsIAccessible **_retval)
{
nsCOMPtr<nsIAccessible> parent;
GetAccParent(getter_AddRefs(parent));
*_retval = new nsHTMLComboboxButtonAccessible(parent, mDOMNode, mPresShell);
if (! *_retval)
return NS_ERROR_FAILURE;
NS_ADDREF(*_retval);
return NS_OK;
}
/** -----ComboboxButtonAccessible ----- */
/** Constructor -- cache our parent */
nsHTMLComboboxButtonAccessible::nsHTMLComboboxButtonAccessible(nsIAccessible* aParent,
nsIDOMNode* aDOMNode,
nsIWeakReference* aShell):
nsComboboxButtonAccessible(aParent, aDOMNode, aShell)
{
}
/**
* 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::AccDoAction(PRUint8 index)
{
nsIFrame* frame = nsAccessible::GetBoundsFrame();
nsCOMPtr<nsIPresContext> context;
GetPresContext(context);
if (!context)
return NS_ERROR_FAILURE;
frame->FirstChild(context, nsnull, &frame);
#ifdef DEBUG
if (! nsAccessible::IsCorrectFrameType(frame, nsLayoutAtoms::blockFrame))
return NS_ERROR_FAILURE;
#endif
frame->GetNextSibling(&frame);
#ifdef DEBUG
if (! nsAccessible::IsCorrectFrameType(frame, nsLayoutAtoms::gfxButtonControlFrame))
return NS_ERROR_FAILURE;
#endif
nsCOMPtr<nsIContent> content;
frame->GetContent(getter_AddRefs(content));
// We only have one action, click. Any other index is meaningless(wrong)
if (index == eAction_Click) {
nsCOMPtr<nsIDOMHTMLInputElement> element(do_QueryInterface(content));
if (element)
{
element->Click();
return NS_OK;
}
return NS_ERROR_FAILURE;
}
return NS_ERROR_INVALID_ARG;
}
/**
* Our next sibling is an nsHTMLComboboxWindowAccessible object
*/
NS_IMETHODIMP nsHTMLComboboxButtonAccessible::GetAccNextSibling(nsIAccessible **_retval)
{
nsCOMPtr<nsIAccessible> parent;
GetAccParent(getter_AddRefs(parent));
*_retval = new nsHTMLComboboxWindowAccessible(parent, mDOMNode, mPresShell);
if (! *_retval)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*_retval);
return NS_OK;
}
/**
* Our next sibling is an nsHTMLComboboxTextFieldAccessible object
*/
NS_IMETHODIMP nsHTMLComboboxButtonAccessible::GetAccPreviousSibling(nsIAccessible **_retval)
{
nsCOMPtr<nsIAccessible> parent;
GetAccParent(getter_AddRefs(parent));
*_retval = new nsHTMLComboboxTextFieldAccessible(parent, mDOMNode, mPresShell);
if (! *_retval)
return NS_ERROR_FAILURE;
NS_ADDREF(*_retval);
return NS_OK;
}
/** ----- nsHTMLComboboxWindowAccessible ----- */
/**
* Constructor -- cache our parent
*/
nsHTMLComboboxWindowAccessible::nsHTMLComboboxWindowAccessible(nsIAccessible* aParent,
nsIDOMNode* aDOMNode,
nsIWeakReference* aShell):
nsComboboxWindowAccessible(aParent, aDOMNode, aShell)
{
}
/**
* Our previous sibling is a nsHTMLComboboxButtonAccessible object
*/
NS_IMETHODIMP nsHTMLComboboxWindowAccessible::GetAccPreviousSibling(nsIAccessible **_retval)
{
nsCOMPtr<nsIAccessible> parent;
GetAccParent(getter_AddRefs(parent));
*_retval = new nsHTMLComboboxButtonAccessible(parent, mDOMNode, mPresShell);
if (! *_retval)
return NS_ERROR_FAILURE;
NS_ADDREF(*_retval);
return NS_OK;
}
/**
* We only have one child, a list
*/
NS_IMETHODIMP nsHTMLComboboxWindowAccessible::GetAccLastChild(nsIAccessible **_retval)
{
*_retval = new nsHTMLSelectListAccessible(this, mDOMNode, mPresShell);
if (! *_retval)
return NS_ERROR_FAILURE;
NS_ADDREF(*_retval);
return NS_OK;
}
/**
* We only have one child, a list
*/
NS_IMETHODIMP nsHTMLComboboxWindowAccessible::GetAccFirstChild(nsIAccessible **_retval)
{
*_retval = new nsHTMLSelectListAccessible(this, mDOMNode, mPresShell);
if (! *_retval)
return NS_ERROR_FAILURE;
NS_ADDREF(*_retval);
return NS_OK;
}
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