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

/* -*- Mode: C++; tab-width: 2; 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
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 * License.
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 * 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):
 *   Aaron Leventhal (aaronl@netscape.com)
 *   Kyle Yuan (kyle.yuan@sun.com)
 *
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 * 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"),
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#include "nsHTMLTextAccessible.h"
#include "nsIFrame.h"
#include "nsIPresContext.h"
#include "nsIPresShell.h"
#include "nsISelection.h"
#include "nsISelectionController.h"

nsHTMLTextAccessible::nsHTMLTextAccessible(nsIDOMNode* aDomNode, nsIWeakReference* aShell):
nsTextAccessibleWrap(aDomNode, aShell)
{ 
}

NS_IMETHODIMP nsHTMLTextAccessible::GetAccName(nsAString& aName)
{ 
  nsAutoString accName;
  if (NS_FAILED(mDOMNode->GetNodeValue(accName)))
    return NS_ERROR_FAILURE;
  accName.CompressWhitespace();
  aName = accName;
  return NS_OK;
}

NS_IMETHODIMP nsHTMLTextAccessible::GetAccState(PRUint32 *aState)
{
  nsTextAccessible::GetAccState(aState);
  // Get current selection and find out if current node is in it
  nsCOMPtr<nsIPresShell> shell(GetPresShell());
  if (!shell) {
     return NS_ERROR_FAILURE;  
  }

  nsCOMPtr<nsIPresContext> context;
  shell->GetPresContext(getter_AddRefs(context));
  nsCOMPtr<nsIContent> content(do_QueryInterface(mDOMNode));
  nsIFrame *frame = nsnull;
  if (content && NS_SUCCEEDED(shell->GetPrimaryFrameFor(content, &frame)) && frame) {
    nsCOMPtr<nsISelectionController> selCon;
    frame->GetSelectionController(context, getter_AddRefs(selCon));
    if (selCon) {
      nsCOMPtr<nsISelection> domSel;
      selCon->GetSelection(nsISelectionController::SELECTION_NORMAL, getter_AddRefs(domSel));
      if (domSel) {
        PRBool isSelected = PR_FALSE, isCollapsed = PR_TRUE;
        domSel->ContainsNode(mDOMNode, PR_TRUE, &isSelected);
        domSel->GetIsCollapsed(&isCollapsed);
        if (isSelected && !isCollapsed)
          *aState |=STATE_SELECTED;
      }
    }
  }
  *aState |= STATE_SELECTABLE;

  nsCOMPtr<nsIAccessibleDocument> docAccessible(GetDocAccessible());
  if (docAccessible) {
    PRBool isEditable;
    docAccessible->GetIsEditable(&isEditable);
    if (!isEditable) {
      *aState |= STATE_READONLY;
    }
  }

  return NS_OK;
}

nsHTMLHRAccessible::nsHTMLHRAccessible(nsIDOMNode* aDomNode, nsIWeakReference* aShell):
nsLeafAccessible(aDomNode, aShell)
{ 
}

NS_IMETHODIMP nsHTMLHRAccessible::GetAccRole(PRUint32 *aRole)
{
  *aRole = ROLE_SEPARATOR;
  return NS_OK;
}

NS_IMETHODIMP nsHTMLHRAccessible::GetAccState(PRUint32 *aState)
{
  nsLeafAccessible::GetAccState(aState);
  *aState &= ~STATE_FOCUSABLE;
  return NS_OK;
}

nsHTMLLabelAccessible::nsHTMLLabelAccessible(nsIDOMNode* aDomNode, nsIWeakReference* aShell):
nsTextAccessible(aDomNode, aShell)
{ 
}

NS_IMETHODIMP nsHTMLLabelAccessible::GetAccName(nsAString& aReturn)
{ 
  nsresult rv = NS_ERROR_FAILURE;
  nsCOMPtr<nsIContent> content(do_QueryInterface(mDOMNode));

  nsAutoString name;
  if (content)
    rv = AppendFlatStringFromSubtree(content, &name);

  if (NS_SUCCEEDED(rv)) {
    // Temp var needed until CompressWhitespace built for nsAString
    name.CompressWhitespace();
    aReturn = name;
  }

  return rv;
}

NS_IMETHODIMP nsHTMLLabelAccessible::GetAccRole(PRUint32 *aRole)
{
  *aRole = ROLE_STATICTEXT;
  return NS_OK;
}

NS_IMETHODIMP nsHTMLLabelAccessible::GetAccState(PRUint32 *aState)
{
  nsTextAccessible::GetAccState(aState);
  *aState &= (STATE_LINKED|STATE_TRAVERSED);  // Only use link states
  return NS_OK;
}

NS_IMETHODIMP nsHTMLLabelAccessible::GetAccFirstChild(nsIAccessible **aAccFirstChild) 
{  
  // A <label> is not necessarily a leaf!
  return nsAccessible::GetAccFirstChild(aAccFirstChild);
}

  /* readonly attribute nsIAccessible accFirstChild; */
NS_IMETHODIMP nsHTMLLabelAccessible::GetAccLastChild(nsIAccessible **aAccLastChild)
{  
  // A <label> is not necessarily a leaf!
  return nsAccessible::GetAccLastChild(aAccLastChild);
}

/* readonly attribute long accChildCount; */
NS_IMETHODIMP nsHTMLLabelAccessible::GetAccChildCount(PRInt32 *aAccChildCount) 
{
  // A <label> is not necessarily a leaf!
  return nsAccessible::GetAccChildCount(aAccChildCount);
}