mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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376 lines
11 KiB
C++
376 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Aaron Leventhal (aaronl@netscape.com)
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* Kyle Yuan (kyle.yuan@sun.com)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsHTMLTextAccessible.h"
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#include "nsAccessibleTreeWalker.h"
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#include "nsIAccessibleDocument.h"
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#include "nsIAccessibleEvent.h"
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#include "nsIFrame.h"
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#include "nsPresContext.h"
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#include "nsIPresShell.h"
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#include "nsISelection.h"
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#include "nsISelectionController.h"
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#include "nsComponentManagerUtils.h"
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nsHTMLTextAccessible::nsHTMLTextAccessible(nsIDOMNode* aDomNode, nsIWeakReference* aShell):
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nsTextAccessibleWrap(aDomNode, aShell)
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{
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}
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NS_IMETHODIMP nsHTMLTextAccessible::GetName(nsAString& aName)
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{
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aName.Truncate();
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return AppendTextTo(aName, 0, PR_UINT32_MAX);
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}
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NS_IMETHODIMP nsHTMLTextAccessible::GetRole(PRUint32 *aRole)
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{
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nsIFrame *frame = GetFrame();
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// Don't return on null frame -- we still return a role
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// after accessible is shutdown/DEFUNCT
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if (frame && frame->IsGeneratedContentFrame()) {
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*aRole = nsIAccessibleRole::ROLE_STATICTEXT;
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return NS_OK;
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}
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return nsTextAccessible::GetRole(aRole);
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}
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NS_IMETHODIMP
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nsHTMLTextAccessible::GetState(PRUint32 *aState, PRUint32 *aExtraState)
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{
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nsresult rv = nsTextAccessible::GetState(aState, aExtraState);
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NS_ENSURE_SUCCESS(rv, rv);
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if (!mDOMNode)
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return NS_OK;
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nsCOMPtr<nsIAccessible> docAccessible =
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do_QueryInterface(nsCOMPtr<nsIAccessibleDocument>(GetDocAccessible()));
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if (docAccessible) {
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PRUint32 state, extState;
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docAccessible->GetFinalState(&state, &extState);
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if (0 == (extState & nsIAccessibleStates::EXT_STATE_EDITABLE)) {
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*aState |= nsIAccessibleStates::STATE_READONLY; // Links not focusable in editor
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}
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}
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return NS_OK;
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}
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nsresult
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nsHTMLTextAccessible::GetAttributesInternal(nsIPersistentProperties *aAttributes)
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{
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if (!mDOMNode) {
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return NS_ERROR_FAILURE; // Node already shut down
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}
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PRUint32 role;
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GetRole(&role);
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if (role == nsIAccessibleRole::ROLE_STATICTEXT) {
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nsAutoString oldValueUnused;
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aAttributes->SetStringProperty(NS_LITERAL_CSTRING("static"),
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NS_LITERAL_STRING("true"), oldValueUnused);
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}
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return NS_OK;
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}
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nsHTMLHRAccessible::nsHTMLHRAccessible(nsIDOMNode* aDomNode, nsIWeakReference* aShell):
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nsLeafAccessible(aDomNode, aShell)
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{
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}
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NS_IMETHODIMP nsHTMLHRAccessible::GetRole(PRUint32 *aRole)
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{
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*aRole = nsIAccessibleRole::ROLE_SEPARATOR;
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return NS_OK;
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}
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nsHTMLBRAccessible::nsHTMLBRAccessible(nsIDOMNode* aDomNode, nsIWeakReference* aShell):
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nsLeafAccessible(aDomNode, aShell)
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{
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}
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NS_IMETHODIMP nsHTMLBRAccessible::GetRole(PRUint32 *aRole)
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{
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*aRole = nsIAccessibleRole::ROLE_WHITESPACE;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLBRAccessible::GetState(PRUint32 *aState, PRUint32 *aExtraState)
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{
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*aState = nsIAccessibleStates::STATE_READONLY;
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if (aExtraState) {
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*aExtraState = mDOMNode ? 0 : nsIAccessibleStates::EXT_STATE_DEFUNCT;
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsHTMLBRAccessible::GetName(nsAString& aName)
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{
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aName = static_cast<PRUnichar>('\n'); // Newline char
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return NS_OK;
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}
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// A label is an element (not a leaf) and thus can support advanced interfaces.
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// We need to skip over nsTextAccessible QI which prevents that
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NS_IMPL_ISUPPORTS_INHERITED0(nsHTMLLabelAccessible, nsLinkableAccessible)
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nsHTMLLabelAccessible::nsHTMLLabelAccessible(nsIDOMNode* aDomNode, nsIWeakReference* aShell):
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nsTextAccessible(aDomNode, aShell)
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{
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}
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NS_IMETHODIMP nsHTMLLabelAccessible::GetName(nsAString& aReturn)
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{
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nsresult rv = NS_ERROR_FAILURE;
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nsCOMPtr<nsIContent> content(do_QueryInterface(mDOMNode));
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nsAutoString name;
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if (content)
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rv = AppendFlatStringFromSubtree(content, &name);
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if (NS_SUCCEEDED(rv)) {
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// Temp var needed until CompressWhitespace built for nsAString
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name.CompressWhitespace();
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aReturn = name;
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}
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return rv;
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}
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NS_IMETHODIMP nsHTMLLabelAccessible::GetRole(PRUint32 *aRole)
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{
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*aRole = nsIAccessibleRole::ROLE_LABEL;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLLabelAccessible::GetState(PRUint32 *aState, PRUint32 *aExtraState)
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{
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nsresult rv = nsTextAccessible::GetState(aState, aExtraState);
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NS_ENSURE_SUCCESS(rv, rv);
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if (mDOMNode) {
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*aState &= (nsIAccessibleStates::STATE_LINKED |
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nsIAccessibleStates::STATE_TRAVERSED); // Only use link states
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsHTMLLabelAccessible::GetFirstChild(nsIAccessible **aFirstChild)
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{
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// A <label> is not necessarily a leaf!
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return nsAccessible::GetFirstChild(aFirstChild);
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}
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/* readonly attribute nsIAccessible accFirstChild; */
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NS_IMETHODIMP nsHTMLLabelAccessible::GetLastChild(nsIAccessible **aLastChild)
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{
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// A <label> is not necessarily a leaf!
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return nsAccessible::GetLastChild(aLastChild);
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}
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/* readonly attribute long accChildCount; */
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NS_IMETHODIMP nsHTMLLabelAccessible::GetChildCount(PRInt32 *aAccChildCount)
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{
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// A <label> is not necessarily a leaf!
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return nsAccessible::GetChildCount(aAccChildCount);
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}
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nsHTMLLIAccessible::nsHTMLLIAccessible(nsIDOMNode *aDOMNode, nsIWeakReference* aShell,
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const nsAString& aBulletText):
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nsLinkableAccessible(aDOMNode, aShell)
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{
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if (!aBulletText.IsEmpty()) {
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mBulletAccessible = new nsHTMLListBulletAccessible(mDOMNode, mWeakShell,
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aBulletText);
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nsCOMPtr<nsPIAccessNode> bulletANode(mBulletAccessible);
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if (bulletANode) {
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bulletANode->Init();
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}
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}
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}
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NS_IMETHODIMP nsHTMLLIAccessible::Shutdown()
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{
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if (mBulletAccessible) {
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// Ensure that weak pointer to this is nulled out
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mBulletAccessible->Shutdown();
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}
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nsresult rv = nsLinkableAccessible::Shutdown();
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mBulletAccessible = nsnull;
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return rv;
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}
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NS_IMETHODIMP
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nsHTMLLIAccessible::GetState(PRUint32 *aState, PRUint32 *aExtraState)
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{
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nsresult rv = nsAccessibleWrap::GetState(aState, aExtraState);
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NS_ENSURE_SUCCESS(rv, rv);
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*aState |= nsIAccessibleStates::STATE_READONLY;
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return NS_OK;
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}
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NS_IMETHODIMP nsHTMLLIAccessible::GetBounds(PRInt32 *x, PRInt32 *y, PRInt32 *width, PRInt32 *height)
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{
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nsresult rv = nsAccessibleWrap::GetBounds(x, y, width, height);
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if (NS_FAILED(rv) || !mBulletAccessible) {
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return rv;
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}
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PRInt32 bulletX, bulletY, bulletWidth, bulletHeight;
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rv = mBulletAccessible->GetBounds(&bulletX, &bulletY, &bulletWidth, &bulletHeight);
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NS_ENSURE_SUCCESS(rv, rv);
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*x = bulletX; // Move x coordinate of list item over to cover bullet as well
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*width += bulletWidth;
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return NS_OK;
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}
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void nsHTMLLIAccessible::CacheChildren()
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{
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if (!mWeakShell || mAccChildCount != eChildCountUninitialized) {
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return;
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}
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nsAccessibleWrap::CacheChildren();
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if (mBulletAccessible) {
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mBulletAccessible->SetNextSibling(mFirstChild);
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mBulletAccessible->SetParent(this); // Set weak parent;
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SetFirstChild(mBulletAccessible);
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++ mAccChildCount;
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}
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}
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// nsHTMLListBulletAccessible
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nsHTMLListBulletAccessible::
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nsHTMLListBulletAccessible(nsIDOMNode* aDomNode, nsIWeakReference* aShell,
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const nsAString& aBulletText) :
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nsLeafAccessible(aDomNode, aShell), mWeakParent(nsnull),
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mBulletText(aBulletText)
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{
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mBulletText += ' '; // Otherwise bullets are jammed up against list text
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}
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NS_IMETHODIMP
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nsHTMLListBulletAccessible::GetUniqueID(void **aUniqueID)
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{
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// Since mDOMNode is same as for list item, use |this| pointer as the unique Id
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*aUniqueID = static_cast<void*>(this);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLListBulletAccessible::Shutdown()
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{
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mBulletText.Truncate();
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mWeakParent = nsnull;
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return nsLeafAccessible::Shutdown();
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}
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NS_IMETHODIMP
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nsHTMLListBulletAccessible::GetName(nsAString &aName)
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{
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aName = mBulletText;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLListBulletAccessible::GetRole(PRUint32 *aRole)
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{
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*aRole = nsIAccessibleRole::ROLE_STATICTEXT;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLListBulletAccessible::GetState(PRUint32 *aState, PRUint32 *aExtraState)
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{
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nsresult rv = nsLeafAccessible::GetState(aState, aExtraState);
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NS_ENSURE_SUCCESS(rv, rv);
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*aState &= ~nsIAccessibleStates::STATE_FOCUSABLE;
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*aState |= nsIAccessibleStates::STATE_READONLY;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLListBulletAccessible::SetParent(nsIAccessible *aParentAccessible)
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{
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mParent = nsnull;
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mWeakParent = aParentAccessible;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLListBulletAccessible::GetParent(nsIAccessible **aParentAccessible)
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{
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NS_IF_ADDREF(*aParentAccessible = mWeakParent);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTMLListBulletAccessible::AppendTextTo(nsAString& aText, PRUint32 aStartOffset,
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PRUint32 aLength)
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{
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PRUint32 maxLength = mBulletText.Length() - aStartOffset;
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if (aLength > maxLength) {
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aLength = maxLength;
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}
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aText += nsDependentSubstring(mBulletText, aStartOffset, aLength);
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return NS_OK;
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}
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// nsHTMLListAccessible
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NS_IMETHODIMP
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nsHTMLListAccessible::GetState(PRUint32 *aState, PRUint32 *aExtraState)
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{
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nsresult rv = nsHyperTextAccessibleWrap::GetState(aState, aExtraState);
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NS_ENSURE_SUCCESS(rv, rv);
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*aState |= nsIAccessibleStates::STATE_READONLY;
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return NS_OK;
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}
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