gecko-dev/webshell/public/nsILinkHandler.h

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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 1.0 (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 Communicator client 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.
*/
#ifndef nsILinkHandler_h___
#define nsILinkHandler_h___
#include "nsweb.h"
#include "nsISupports.h"
class nsIFrame;
class nsIPostData;
struct nsGUIEvent;
// Interface ID for nsILinkHandler
#define NS_ILINKHANDLER_IID \
{ 0xa6cf905b, 0x15b3, 0x11d2,{0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}}
enum nsLinkState {
eLinkState_Unvisited = 0,
eLinkState_Visited = 1,
eLinkState_OutOfDate = 2, // visited, but the cache is stale
eLinkState_Active = 3, // mouse is down on link
eLinkState_Hover = 4 // mouse is hovering over link
};
/**
* Interface used for handling clicks on links
*/
class nsILinkHandler : public nsISupports {
public:
/**
* Process a click on a link. aFrame is the frame that contains the
* linked content. aURLSpec is an absolute url spec that defines the
* destination for the link. aTargetSpec indicates where the link is
* targeted (it may be an empty string).
*/
NS_IMETHOD OnLinkClick(nsIFrame* aFrame,
const PRUnichar* aURLSpec,
const PRUnichar* aTargetSpec,
nsIPostData* aPostData = 0) = 0;
/**
* Process a mouse-over a link. aFrame is the frame that contains the
* linked content. aURLSpec is an absolute url spec that defines the
* destination for the link. aTargetSpec indicates where the link is
* targeted (it may be an empty string).
*/
NS_IMETHOD OnOverLink(nsIFrame* aFrame,
const PRUnichar* aURLSpec,
const PRUnichar* aTargetSpec) = 0;
/**
* Get the state of a link to a given absolute URL
*/
NS_IMETHOD GetLinkState(const PRUnichar* aURLSpec, nsLinkState& aState) = 0;
};
#endif /* nsILinkHandler_h___ */