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nsXULTreeGridAccessible.h

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 *
 * The Initial Developer of the Original Code is
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 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *   Alexander Surkov <surkov.alexander@gmail.com> (original author)
 *
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 * either of the GNU General Public License Version 2 or later (the "GPL"),
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#ifndef __nsXULTreeGridAccessible_h__
#define __nsXULTreeGridAccessible_h__

#include "nsIAccessibleTable.h"

#include "nsXULTreeAccessible.h"

/**
 * Represents accessible for XUL tree in the case when it has multiple columns.
 */
00049 class nsXULTreeGridAccessible : public nsXULTreeAccessible,
                                public nsIAccessibleTable
{
public:
  nsXULTreeGridAccessible(nsIDOMNode *aDOMNode,
                          nsIWeakReference *aShell);

  // nsISupports
  NS_DECL_ISUPPORTS_INHERITED

  // nsIAccessibleTable
  NS_DECL_NSIACCESSIBLETABLE

  // nsAccessible
  virtual nsresult GetRoleInternal(PRUint32 *aRole);

protected:

  // nsXULTreeAccessible
  virtual void CreateTreeItemAccessible(PRInt32 aRow,
                                        nsAccessNode** aAccessNode);
};


/**
 * Represents accessible for XUL tree item in the case when XUL tree has
 * multiple columns.
 */
00077 class nsXULTreeGridRowAccessible : public nsXULTreeItemAccessibleBase
{
public:
  nsXULTreeGridRowAccessible(nsIDOMNode *aDOMNode, nsIWeakReference *aShell,
                             nsIAccessible *aParent, nsITreeBoxObject *aTree,
                             nsITreeView *aTreeView, PRInt32 aRow);

  // nsISupports and cycle collection
  NS_DECL_ISUPPORTS_INHERITED
  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsXULTreeGridRowAccessible,
                                           nsAccessible)

  // nsIAccessible
  NS_IMETHOD GetFirstChild(nsIAccessible **aFirstChild);
  NS_IMETHOD GetLastChild(nsIAccessible **aLastChild);
  NS_IMETHOD GetChildCount(PRInt32 *aChildCount);
  NS_IMETHOD GetChildAt(PRInt32 aChildIndex, nsIAccessible **aChild);

  // nsAccessNode
  virtual nsresult Shutdown();

  // nsAccessible
  virtual nsresult GetRoleInternal(PRUint32 *aRole);
  virtual nsresult GetChildAtPoint(PRInt32 aX, PRInt32 aY,
                                   PRBool aDeepestChild,
                                   nsIAccessible **aChild);

  // nsXULTreeItemAccessibleBase
  virtual void GetCellAccessible(nsITreeColumn *aColumn, nsIAccessible **aCell);
  virtual void RowInvalidated(PRInt32 aStartColIdx, PRInt32 aEndColIdx);

protected:
  nsAccessNodeHashtable mAccessNodeCache;
};


/**
 * Represents an accessible for XUL tree cell in the case when XUL tree has
 * multiple columns.
 */

#define NS_XULTREEGRIDCELLACCESSIBLE_IMPL_CID         \
{  /* 84588ad4-549c-4196-a932-4c5ca5de5dff */         \
  0x84588ad4,                                         \
  0x549c,                                             \
  0x4196,                                             \
  { 0xa9, 0x32, 0x4c, 0x5c, 0xa5, 0xde, 0x5d, 0xff }  \
}

class nsXULTreeGridCellAccessible : public nsLeafAccessible,
                                    public nsIAccessibleTableCell
{
public:
  nsXULTreeGridCellAccessible(nsIDOMNode *aDOMNode, nsIWeakReference *aShell,
                              nsXULTreeGridRowAccessible *aRowAcc,
                              nsITreeBoxObject *aTree, nsITreeView *aTreeView,
                              PRInt32 aRow, nsITreeColumn* aColumn);

  // nsISupports
  NS_DECL_ISUPPORTS_INHERITED

  // nsIAccessNode
  NS_IMETHOD GetUniqueID(void **aUniqueID);

  // nsIAccessible
  NS_IMETHOD GetParent(nsIAccessible **aParent);
  NS_IMETHOD GetNextSibling(nsIAccessible **aNextSibling);
  NS_IMETHOD GetPreviousSibling(nsIAccessible **aPrevSibling);

  NS_IMETHOD GetFocusedChild(nsIAccessible **aFocusedChild);

  NS_IMETHOD GetName(nsAString& aName);
  NS_IMETHOD GetBounds(PRInt32 *aX, PRInt32 *aY,
                       PRInt32 *aWidth, PRInt32 *aHeight);

  NS_IMETHOD GetNumActions(PRUint8 *aCount);
  NS_IMETHOD GetActionName(PRUint8 aIndex, nsAString& aName);
  NS_IMETHOD DoAction(PRUint8 aIndex);

  // nsIAccessibleTableCell
  NS_DECL_NSIACCESSIBLETABLECELL

  // nsAccessNode
  virtual PRBool IsDefunct();
  virtual nsresult Init();

  // nsAccessible
  virtual nsresult GetAttributesInternal(nsIPersistentProperties *aAttributes);
  virtual nsresult GetRoleInternal(PRUint32 *aRole);
  virtual nsresult GetStateInternal(PRUint32 *aState, PRUint32 *aExtraState);

  // nsXULTreeGridCellAccessible
  NS_DECLARE_STATIC_IID_ACCESSOR(NS_XULTREEGRIDCELLACCESSIBLE_IMPL_CID)

  /**
   * Return index of the column.
   */
  PRInt32 GetColumnIndex() const;

  /**
   * Fire name or state change event if the accessible text or value has been
   * changed.
   */
  void CellInvalidated();

protected:
  // nsAccessible
  virtual void DispatchClickEvent(nsIContent *aContent, PRUint32 aActionIndex);

  // nsXULTreeGridCellAccessible

  /**
   * Return true if value of cell can be modified.
   */
  PRBool IsEditable() const;

  enum { eAction_Click = 0 };

  nsCOMPtr<nsITreeBoxObject> mTree;
  nsCOMPtr<nsITreeView> mTreeView;

  PRInt32 mRow;
  nsCOMPtr<nsITreeColumn> mColumn;

  nsString mCachedTextEquiv;
};

NS_DEFINE_STATIC_IID_ACCESSOR(nsXULTreeGridCellAccessible,
                              NS_XULTREEGRIDCELLACCESSIBLE_IMPL_CID)

#endif

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