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 *
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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * 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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 *
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#ifndef nsIEventStateManager_h__
#define nsIEventStateManager_h__

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

class nsIContent;
class nsPresContext;
class nsIDOMEvent;
class nsIFrame;
class nsIView;
class nsIWidget;
class imgIContainer;

/*
 * Event state manager interface.
 */
// 2270e188-6743-441e-b6e1-af83f1047a53
#define NS_IEVENTSTATEMANAGER_IID \
{ 0x2270e188, 0x6743, 0x441e, \
  { 0xb6, 0xe1, 0xaf, 0x83, 0xf1, 0x04, 0x7a, 0x53 } }


#define NS_EVENT_NEEDS_FRAME(event) (!NS_IS_FOCUS_EVENT(event))

class nsIEventStateManager : public nsISupports {

public:
  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)
  };

  NS_DEFINE_STATIC_IID_ACCESSOR(NS_IEVENTSTATEMANAGER_IID)

  NS_IMETHOD Init() = 0;

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

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

  NS_IMETHOD SetPresContext(nsPresContext* 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;

  // Get the previously-focused content node for this document
  NS_IMETHOD GetLastFocusedContent(nsIContent **aContent) = 0;

  NS_IMETHOD GetFocusedFrame(nsIFrame **aFrame) = 0;

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

  // Return whether browse with caret is enabled or not
  virtual PRBool GetBrowseWithCaret() = 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;

  // Set focus on any element that can receive focus, or on document via aFocusContent == nsnull
  // Must supply method that focus is being set with
  NS_IMETHOD ChangeFocusWith(nsIContent *aFocusContent, EFocusedWithType aFocusedWith) = 0;

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

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

  NS_IMETHOD SetCursor(PRInt32 aCursor, imgIContainer* aContainer,
                       PRBool aHaveHotspot, float aHotspotX, float aHotspotY,
                       nsIWidget* aWidget, PRBool aLockCursor) = 0;

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

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

#define NS_EVENT_STATE_ACTIVE        0x00000001 // mouse is down on content
#define NS_EVENT_STATE_FOCUS         0x00000002 // content has focus
#define NS_EVENT_STATE_HOVER         0x00000004 // mouse is hovering over content
#define NS_EVENT_STATE_DRAGOVER      0x00000008 // drag  is hovering over content
#define NS_EVENT_STATE_URLTARGET     0x00000010 // content is URL's target (ref)

// The following states are used only for ContentStatesChanged
// CSS 3 Selectors
#define NS_EVENT_STATE_CHECKED       0x00000020
#define NS_EVENT_STATE_ENABLED       0x00000040
#define NS_EVENT_STATE_DISABLED      0x00000080
// CSS 3 UI
#define NS_EVENT_STATE_REQUIRED      0x00000100
#define NS_EVENT_STATE_OPTIONAL      0x00000200
#define NS_EVENT_STATE_VISITED       0x00000400
#define NS_EVENT_STATE_VALID         0x00000800
#define NS_EVENT_STATE_INVALID       0x00001000
#define NS_EVENT_STATE_INRANGE       0x00002000
#define NS_EVENT_STATE_OUTOFRANGE    0x00004000
#define NS_EVENT_STATE_MOZ_READONLY  0x00008000
#define NS_EVENT_STATE_MOZ_READWRITE 0x00010000

#endif // nsIEventStateManager_h__