gecko-dev/layout/base/public/nsIFocusTracker.h
mjudge%netscape.com 91c9ce3a57 legal changes
2000-05-15 14:22:03 +00:00

76 lines
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* 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 compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
*
* Contributors:
*/
#ifndef nsIFocusTracker_h___
#define nsIFocusTracker_h___
#include "nsISupports.h"
#include "nsIFrame.h"
class nsIPresContext;
// IID for the nsIFocusTracker interface
#define NS_IFOCUSTRACKER_IID \
{ 0x81ac51d1, 0x923b, 0x11d2, \
{ 0x91, 0x8f, 0x0, 0x80, 0xc8, 0xe4, 0x4d, 0xb5 } }
class nsIFocusTracker : public nsISupports
{
public:
static const nsIID& GetIID() { static nsIID iid = NS_IFOCUSTRACKER_IID; return iid; }
/** ScrollFrameIntoView
* limited version of nsPresShell::ScrollFrameIntoView
* @param aFrame will be the frame to scroll into view.
*/
NS_IMETHOD ScrollFrameIntoView(nsIFrame *aFrame) = 0;
/**
* Returns the primary frame associated with the content object.
*
* The primary frame is the frame that is most closely associated with the
* content. A frame is more closely associated with the content that another
* frame if the one frame contains directly or indirectly the other frame (e.g.,
* when a frame is scrolled there is a scroll frame that contains the frame
* being scrolled). The primary frame is always the first-in-flow.
*
* In the case of absolutely positioned elements and floated elements,
* the primary frame is the frame that is out of the flow and not the
* placeholder frame.
*/
NS_IMETHOD GetPrimaryFrameFor(nsIContent* aContent,
nsIFrame** aPrimaryFrame) const = 0;
/**
* GetPresContent will return the nsIPresContext Interface from this
* FocusTracker
* usefull for getting screen coordinates of current selection
*/
NS_IMETHOD GetPresContext(nsIPresContext **aContext) = 0;
};
#endif //nsIFocusTracker_h___