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 * for the specific language governing rights and limitations under the
 * License.
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 * The Original Code is mozilla.org code.
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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):
 *
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 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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#ifndef nsIEventStateManager_h__
#define nsIEventStateManager_h__

#include "nsEvent.h"
#include "nsISupports.h"
#include "nsVoidArray.h"

class nsIContent;
class nsIPresContext;
class nsIDOMEvent;
class nsIFrame;
class nsIView;
class nsIWidget;

/*
 * Event listener manager interface.
 */
#define NS_IEVENTSTATEMANAGER_IID \
{ /* 80a98c80-2036-11d2-bd89-00805f8ae3f4 */ \
0x80a98c80, 0x2036, 0x11d2, \
{0xbd, 0x89, 0x00, 0x80, 0x5f, 0x8a, 0xe3, 0xf4} }

class nsIEventStateManager : public nsISupports {

public:
  static const nsIID& GetIID() { static nsIID iid = NS_IEVENTSTATEMANAGER_IID; return iid; }

  NS_IMETHOD Init() = 0;

  NS_IMETHOD PreHandleEvent(nsIPresContext* aPresContext, 
                         nsEvent *aEvent, 
                         nsIFrame* aTargetFrame,
                         nsEventStatus* aStatus,
                         nsIView* aView) = 0;

  NS_IMETHOD PostHandleEvent(nsIPresContext* aPresContext, 
                         nsEvent *aEvent, 
                         nsIFrame* aTargetFrame,
                         nsEventStatus* aStatus,
                         nsIView* aView) = 0;

  NS_IMETHOD SetPresContext(nsIPresContext* aPresContext) = 0;
  NS_IMETHOD ClearFrameRefs(nsIFrame* aFrame) = 0;

  NS_IMETHOD GetEventTarget(nsIFrame **aFrame) = 0;
  NS_IMETHOD GetEventTargetContent(nsEvent* aEvent, nsIContent** aContent) = 0;
  NS_IMETHOD GetEventRelatedContent(nsIContent** aContent) = 0;

  NS_IMETHOD GetContentState(nsIContent *aContent, PRInt32& aState) = 0;
  NS_IMETHOD SetContentState(nsIContent *aContent, PRInt32 aState) = 0;

  NS_IMETHOD GetFocusedContent(nsIContent **aContent) = 0;
  NS_IMETHOD SetFocusedContent(nsIContent* aContent) = 0;

  NS_IMETHOD ContentRemoved(nsIContent* aContent) = 0;
  NS_IMETHOD EventStatusOK(nsGUIEvent* aEvent, PRBool *aOK) = 0;

  // This is called when browse with caret changes on the fly
  NS_IMETHOD ResetBrowseWithCaret(PRBool *aBrowseWithCaret) = 0;

  // This is called after find text or when a cursor movement key is pressed
  // If aCanFocusDoc == PR_TRUE, the current document will be focused if caret is not on a focusable element
  NS_IMETHOD MoveFocusToCaret(PRBool aCanFocusDoc, PRBool *aIsSelectionWithFocus) = 0;
  NS_IMETHOD MoveCaretToFocus() = 0;

  NS_IMETHOD GetNextTabbableContent(nsIContent* aRootContent, nsIFrame* aFrame,
                                    PRBool forward, PRBool aIgnoreTabIndex, nsIContent** aResult) = 0;

  // This is an experiment and may be temporary
  NS_IMETHOD ConsumeFocusEvents(PRBool aDoConsume) = 0;

  // Access Key Registration
  NS_IMETHOD RegisterAccessKey(nsIFrame * aFrame, nsIContent* aContent, PRUint32 aKey) = 0;
  NS_IMETHOD UnregisterAccessKey(nsIFrame * aFrame, nsIContent* aContent, PRUint32 aKey) = 0;

  NS_IMETHOD SetCursor(PRInt32 aCursor, nsIWidget* aWidget, PRBool aLockCursor) = 0;

  //Method for centralized distribution of new DOM events
  NS_IMETHOD DispatchNewEvent(nsISupports* aTarget, nsIDOMEvent* aEvent, PRBool* aPreventDefault) = 0;

  // Method for moving the focus forward/back.
  NS_IMETHOD ShiftFocus(PRBool aDirection, nsIContent* aStart)=0;

};

#define NS_EVENT_STATE_UNSPECIFIED  0x0000
#define NS_EVENT_STATE_ACTIVE       0x0001 // mouse is down on content
#define NS_EVENT_STATE_FOCUS        0x0002 // content has focus
#define NS_EVENT_STATE_HOVER        0x0004 // mouse is hovering over content
#define NS_EVENT_STATE_DRAGOVER     0x0008 // drag  is hovering over content
// The following states are used only for ContentStatesChanged
#define NS_EVENT_STATE_CHECKED      0x0010

enum EFocusedWithType {
  eEventFocusedByUnknown,     // focus gained via unknown method
  eEventFocusedByMouse,       // focus gained via mouse
  eEventFocusedByKey,         // focus gained via key press (like tab)
  eEventFocusedByContextMenu, // focus gained via context menu
  eEventFocusedByApplication  // focus gained via Application (like script)
};

#endif // nsIEventStateManager_h__
