gecko-dev/layout/base/nsIPresShell.h

144 строки
4.3 KiB
C++

/* -*- 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 "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsIPresShell_h___
#define nsIPresShell_h___
#include "nslayout.h"
#include "nsISupports.h"
#include "nsCoord.h"
class nsIContent;
class nsIDocument;
class nsIDocumentObserver;
class nsIFrame;
class nsIPresContext;
class nsIStyleSet;
class nsIViewManager;
class nsIReflowCommand;
class nsIDeviceContext;
class nsIRenderingContext;
class nsIPageSequenceFrame;
#define NS_IPRESSHELL_IID \
{ 0x76e79c60, 0x944e, 0x11d1, \
{0x93, 0x23, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }
/**
* Presentation shell interface. Presentation shells are the
* controlling point for managing the presentation of a document. The
* presentation shell holds a live reference to the document, the
* presentation context, the style manager, the style set and the root
* frame. <p>
*
* When this object is Release'd, it will release the document, the
* presentation context, the style manager, the style set and the root
* frame.
*/
class nsIPresShell : public nsISupports {
public:
NS_IMETHOD Init(nsIDocument* aDocument,
nsIPresContext* aPresContext,
nsIViewManager* aViewManager,
nsIStyleSet* aStyleSet) = 0;
virtual nsIDocument* GetDocument() = 0;
virtual nsIPresContext* GetPresContext() = 0;
virtual nsIViewManager * GetViewManager() = 0;
virtual nsIStyleSet* GetStyleSet() = 0;
virtual nsresult SetFocus(nsIFrame *aFrame) = 0;
NS_IMETHOD EnterReflowLock() = 0;
NS_IMETHOD ExitReflowLock() = 0;
// Make shell be a document observer
virtual void BeginObservingDocument() = 0;
// Make shell stop being a document observer
virtual void EndObservingDocument() = 0;
/**
* Perform the initial reflow. Constructs the frame for the root content
* object and then reflows the frame model into the specified width and
* height.
*
* The coordinates for aWidth and aHeight must be in standard nscoord's.
*/
NS_IMETHOD InitialReflow(nscoord aWidth, nscoord aHeight) = 0;
/**
* Reflow the frame model into a new width and height. The
* coordinates for aWidth and aHeight must be in standard nscoord's.
*/
NS_IMETHOD ResizeReflow(nscoord aWidth, nscoord aHeight) = 0;
/**
* Reflow the frame model with a reflow reason of eReflowReason_StyleChange
*/
NS_IMETHOD StyleChangeReflow() = 0;
virtual nsIFrame* GetRootFrame() = 0;
/**
* Returns the page sequence frame associated with the frame hierarchy.
* Returns NULL if not a paginated view.
*/
NS_IMETHOD GetPageSequenceFrame(nsIPageSequenceFrame*& aPageSequenceFrame) = 0;
virtual nsIFrame* FindFrameWithContent(nsIContent* aContent) = 0;
virtual void AppendReflowCommand(nsIReflowCommand* aReflowCommand) = 0;
virtual void ProcessReflowCommands() = 0;
virtual void ClearFrameRefs(nsIFrame* aFrame) = 0;
/**
* Given a frame, cough up a rendering context suitable for use with
* the frame.
*/
NS_IMETHOD CreateRenderingContext(nsIFrame *aFrame, nsIRenderingContext *&aContext) = 0;
// XXX events
// XXX selection
/**
* See if reflow verification is enabled. To enable reflow verification add
* "verifyreflow:1" to your NSPR_LOG_MODULES environment variable
* (any non-zero debug level will work). Or, call SetVerifyReflowEnable
* with PR_TRUE.
*/
static NS_LAYOUT PRBool GetVerifyReflowEnable();
/**
* Set the verify-reflow enable flag.
*/
static NS_LAYOUT void SetVerifyReflowEnable(PRBool aEnabled);
};
/**
* Create a new empty presentation shell. Upon success, call Init
* before attempting to use the shell.
*/
extern NS_LAYOUT nsresult
NS_NewPresShell(nsIPresShell** aInstancePtrResult);
#endif /* nsIPresShell_h___ */