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gecko-dev
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gecko-dev/layout/base/public/nsIDocument.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 "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 nsIDocument_h___
#define nsIDocument_h___
#include "nslayout.h"
#include "nsISupports.h"
#include "nsIUnicharInputStream.h"
#include "nsGUIEvent.h"
class nsIAtom;
class nsIArena;
class nsIContent;
class nsIDocumentContainer;
class nsIDocumentObserver;
class nsIPresContext;
class nsIPresShell;
class nsIStreamListener;
class nsIStreamObserver;
class nsIStyleSet;
class nsIStyleSheet;
class nsIStyleRule;
class nsIURI;
class nsILoadGroup;
class nsIViewManager;
class nsString;
class nsIScriptContextOwner;
class nsIContentViewerContainer;
class nsIDOMEvent;
class nsIDeviceContext;
class nsIParser;
class nsIDOMNode;
class nsXIFConverter;
class nsINameSpaceManager;
class nsIDOMDocumentFragment;
class nsILineBreaker;
class nsIWordBreaker;
class nsIDOMSelection;
class nsIChannel;
// IID for the nsIDocument interface
#define NS_IDOCUMENT_IID \
{ 0x94c6ceb0, 0x9447, 0x11d1, \
{0x93, 0x23, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }
// specification for data to be sent via form "post"
// IID for the nsIPostData interface - 152ab6e0-ff13-11d1-beb9-00805f8a66dc
#define NS_IPOSTDATA_IID \
{ 0x152ab6e0, 0xff13, 0x11d1, \
{0xbe, 0xb9, 0x00, 0x80, 0x5f, 0x8a, 0x66, 0xdc} }
class nsIPostData : public nsISupports {
public:
static const nsIID& GetIID() { static nsIID iid = NS_IPOSTDATA_IID; return iid; }
virtual PRBool IsFile() = 0; // is the data a file (or raw data)
virtual const char* GetData() = 0; // get the file name or raw data
virtual PRInt32 GetDataLength() = 0;
};
//----------------------------------------------------------------------
// Document interface
class nsIDocument : public nsISupports {
public:
static const nsIID& GetIID() { static nsIID iid = NS_IDOCUMENT_IID; return iid; }
// All documents have a memory arena associated with them which is
// used for memory allocation during document creation. This call
// returns the arena associated with this document.
virtual nsIArena* GetArena() = 0;
NS_IMETHOD StartDocumentLoad(const char* aCommand,
#ifdef NECKO
nsIChannel* aChannel,
nsILoadGroup* aLoadGroup,
#else
nsIURI *aUrl,
#endif
nsIContentViewerContainer* aContainer,
nsIStreamListener **aDocListener) = 0;
/**
* Return the title of the document. May return null.
*/
virtual const nsString* GetDocumentTitle() const = 0;
/**
* Return the URL for the document. May return null.
*/
virtual nsIURI* GetDocumentURL() const = 0;
/**
* Return the LoadGroup for the document. May return null.
*/
virtual nsILoadGroup* GetDocumentLoadGroup() const = 0;
/**
* Return the base URL for realtive URLs in the document. May return null (or the document URL).
*/
NS_IMETHOD GetBaseURL(nsIURI*& aURL) const = 0;
/**
* Return the content (mime) type of this document.
*/
NS_IMETHOD GetContentType(nsString& aContentType) const = 0;
/**
* Return a standard name for the document's character set. This will
* trigger a startDocumentLoad if necessary to answer the question.
*/
NS_IMETHOD GetDocumentCharacterSet(nsString& oCharSetID) = 0;
NS_IMETHOD SetDocumentCharacterSet(const nsString& aCharSetID) = 0;
/**
* Return the Line Breaker for the document
*/
NS_IMETHOD GetLineBreaker(nsILineBreaker** aResult) = 0;
NS_IMETHOD SetLineBreaker(nsILineBreaker* aLineBreaker) = 0;
NS_IMETHOD GetWordBreaker(nsIWordBreaker** aResult) = 0;
NS_IMETHOD SetWordBreaker(nsIWordBreaker* aWordBreaker) = 0;
/**
* Access HTTP header data (this may also get set from other sources, like
* HTML META tags).
*/
NS_IMETHOD GetHeaderData(nsIAtom* aHeaderField, nsString& aData) const = 0;
NS_IMETHOD SetHeaderData(nsIAtom* aheaderField, const nsString& aData) = 0;
/**
* Create a new presentation shell that will use aContext for
* it's presentation context (presentation context's <b>must not</b> be
* shared among multiple presentation shell's).
*/
NS_IMETHOD CreateShell(nsIPresContext* aContext,
nsIViewManager* aViewManager,
nsIStyleSet* aStyleSet,
nsIPresShell** aInstancePtrResult) = 0;
virtual PRBool DeleteShell(nsIPresShell* aShell) = 0;
virtual PRInt32 GetNumberOfShells() = 0;
virtual nsIPresShell* GetShellAt(PRInt32 aIndex) = 0;
/**
* Return the parent document of this document. Will return null
* unless this document is within a compound document and has a parent.
*/
virtual nsIDocument* GetParentDocument() = 0;
virtual void SetParentDocument(nsIDocument* aParent) = 0;
virtual void AddSubDocument(nsIDocument* aSubDoc) = 0;
virtual PRInt32 GetNumberOfSubDocuments() = 0;
virtual nsIDocument* GetSubDocumentAt(PRInt32 aIndex) = 0;
/**
* Return the root content object for this document.
*/
virtual nsIContent* GetRootContent() = 0;
virtual void SetRootContent(nsIContent* aRoot) = 0;
/**
* Methods to append to the prolog and epilog of
* a document. The prolog is the content before the document
* element, the epilog after.
*/
NS_IMETHOD AppendToProlog(nsIContent* aContent) = 0;
NS_IMETHOD AppendToEpilog(nsIContent* aContent) = 0;
/**
* Get the direct children of the document - content in
* the prolog, the root content and content in the epilog.
*/
NS_IMETHOD ChildAt(PRInt32 aIndex, nsIContent*& aResult) const = 0;
NS_IMETHOD IndexOf(nsIContent* aPossibleChild, PRInt32& aIndex) const = 0;
NS_IMETHOD GetChildCount(PRInt32& aCount) = 0;
/**
* Get the style sheets owned by this document.
* Style sheets are ordered, most significant last.
*/
virtual PRInt32 GetNumberOfStyleSheets() = 0;
virtual nsIStyleSheet* GetStyleSheetAt(PRInt32 aIndex) = 0;
virtual PRInt32 GetIndexOfStyleSheet(nsIStyleSheet* aSheet) = 0;
virtual void AddStyleSheet(nsIStyleSheet* aSheet) = 0;
NS_IMETHOD InsertStyleSheetAt(nsIStyleSheet* aSheet, PRInt32 aIndex, PRBool aNotify) = 0;
virtual void SetStyleSheetDisabledState(nsIStyleSheet* aSheet,
PRBool mDisabled) = 0;
/**
* Set the object from which a document can get a script context.
* This is the context within which all scripts (during document
* creation and during event handling) will run.
*/
virtual nsIScriptContextOwner *GetScriptContextOwner() = 0;
virtual void SetScriptContextOwner(nsIScriptContextOwner *aScriptContextOwner) = 0;
/**
* Get the name space manager for this document
*/
NS_IMETHOD GetNameSpaceManager(nsINameSpaceManager*& aManager) = 0;
//----------------------------------------------------------------------
// Document notification API's
/**
* Add a new observer of document change notifications. Whenever
* content is changed, appended, inserted or removed the observers are
* informed.
*/
virtual void AddObserver(nsIDocumentObserver* aObserver) = 0;
/**
* Remove an observer of document change notifications. This will
* return false if the observer cannot be found.
*/
virtual PRBool RemoveObserver(nsIDocumentObserver* aObserver) = 0;
// Observation hooks used by content nodes to propagate
// notifications to document observers.
NS_IMETHOD BeginLoad() = 0;
NS_IMETHOD EndLoad() = 0;
NS_IMETHOD ContentChanged(nsIContent* aContent,
nsISupports* aSubContent) = 0;
// notify that one or two content nodes changed state
// either may be nsnull, but not both
NS_IMETHOD ContentStatesChanged(nsIContent* aContent1,
nsIContent* aContent2) = 0;
NS_IMETHOD AttributeChanged(nsIContent* aChild,
nsIAtom* aAttribute,
PRInt32 aHint) = 0; // See nsStyleConsts fot hint values
NS_IMETHOD ContentAppended(nsIContent* aContainer,
PRInt32 aNewIndexInContainer) = 0;
NS_IMETHOD ContentInserted(nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer) = 0;
NS_IMETHOD ContentReplaced(nsIContent* aContainer,
nsIContent* aOldChild,
nsIContent* aNewChild,
PRInt32 aIndexInContainer) = 0;
NS_IMETHOD ContentRemoved(nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer) = 0;
// Observation hooks for style data to propogate notifications
// to document observers
NS_IMETHOD StyleRuleChanged(nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule,
PRInt32 aHint) = 0; // See nsStyleConsts fot hint values
NS_IMETHOD StyleRuleAdded(nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule) = 0;
NS_IMETHOD StyleRuleRemoved(nsIStyleSheet* aStyleSheet,
nsIStyleRule* aStyleRule) = 0;
/**
* Finds text in content
*/
NS_IMETHOD FindNext(const nsString &aSearchStr, PRBool aMatchCase, PRBool aSearchDown, PRBool &aIsFound) = 0;
/**
* Converts the document or a selection of the
* document to XIF (XML Interchange Format)
* and places the result in aBuffer.
* NOTE: we may way to place the result in a stream,
* but we will use a string for now -- gpk
*/
virtual void CreateXIF(nsString & aBuffer, nsIDOMSelection* aSelection = nsnull) = 0;
virtual void ToXIF(nsXIFConverter& aConverter, nsIDOMNode* aNode) = 0;
virtual void BeginConvertToXIF(nsXIFConverter& aConverter, nsIDOMNode* aNode) = 0;
virtual void ConvertChildrenToXIF(nsXIFConverter& aConverter, nsIDOMNode* aNode) = 0;
virtual void FinishConvertToXIF(nsXIFConverter& aConverter, nsIDOMNode* aNode) = 0;
/* Helper methods to help determine the logical positioning of content */
virtual PRBool IsInSelection(nsIDOMSelection* aSelection, const nsIContent *aContent) const = 0;
virtual nsIContent* GetPrevContent(const nsIContent *aContent) const = 0;
virtual nsIContent* GetNextContent(const nsIContent *aContent) const = 0;
virtual void SetDisplaySelection(PRBool aToggle) = 0;
virtual PRBool GetDisplaySelection() const = 0;
NS_IMETHOD HandleDOMEvent(nsIPresContext& aPresContext,
nsEvent* aEvent,
nsIDOMEvent** aDOMEvent,
PRUint32 aFlags,
nsEventStatus& aEventStatus) = 0;
};
// XXX These belong somewhere else
extern NS_LAYOUT nsresult
NS_NewHTMLDocument(nsIDocument** aInstancePtrResult);
extern NS_LAYOUT nsresult
NS_NewXMLDocument(nsIDocument** aInstancePtrResult);
extern NS_LAYOUT nsresult
NS_NewImageDocument(nsIDocument** aInstancePtrResult);
extern NS_LAYOUT nsresult
NS_NewDocumentFragment(nsIDOMDocumentFragment** aInstancePtrResult,
nsIDocument* aOwnerDocument);
// Note: The buffer passed into NewPostData(...) becomes owned by the IPostData
// instance and is freed when the instance is destroyed...
//
extern NS_LAYOUT nsresult
NS_NewPostData(PRBool aIsFile, char *aData, nsIPostData** aInstancePtrResult);
#endif /* nsIDocument_h___ */
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