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332 lines
16 KiB
C++
332 lines
16 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsIDocumentObserver_h___
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#define nsIDocumentObserver_h___
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#include "nsISupports.h"
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#include "nsIMutationObserver.h"
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class nsIAtom;
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class nsIContent;
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class nsIPresShell;
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class nsIStyleSheet;
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class nsIStyleRule;
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class nsString;
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class nsIDocument;
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#define NS_IDOCUMENT_OBSERVER_IID \
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{ 0x4e14e321, 0xa4bb, 0x49f8, \
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{ 0xa5, 0x7a, 0x23, 0x63, 0x66, 0x8d, 0x14, 0xd0 } }
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typedef PRUint32 nsUpdateType;
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#define UPDATE_CONTENT_MODEL 0x00000001
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#define UPDATE_STYLE 0x00000002
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#define UPDATE_CONTENT_STATE 0x00000004
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#define UPDATE_ALL (UPDATE_CONTENT_MODEL | UPDATE_STYLE | UPDATE_CONTENT_STATE)
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// Document observer interface
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class nsIDocumentObserver : public nsIMutationObserver
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_IDOCUMENT_OBSERVER_IID)
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/**
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* Notify that a content model update is beginning. This call can be
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* nested.
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*/
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virtual void BeginUpdate(nsIDocument *aDocument,
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nsUpdateType aUpdateType) = 0;
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/**
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* Notify that a content model update is finished. This call can be
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* nested.
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*/
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virtual void EndUpdate(nsIDocument *aDocument, nsUpdateType aUpdateType) = 0;
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/**
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* Notify the observer that a document load is beginning.
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*/
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virtual void BeginLoad(nsIDocument *aDocument) = 0;
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/**
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* Notify the observer that a document load has finished. Note that
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* the associated reflow of the document will be done <b>before</b>
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* EndLoad is invoked, not after.
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*/
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virtual void EndLoad(nsIDocument *aDocument) = 0;
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/**
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* Notification that the state of a content node has changed.
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* (ie: gained or lost focus, became active or hovered over)
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* This method is called automatically by content objects
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* when their state is changed (therefore there is normally
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* no need to invoke this method directly). The notification
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* is passed to any IDocumentObservers. The notification is
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* passed on to all of the document observers. <p>
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*
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* This notification is not sent when a piece of content is
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* added/removed from the document or the content itself changed
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* (the other notifications are used for that).
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*
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* The optional second content node is to allow optimization
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* of the case where state moves from one node to another
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* (as is likely for :focus and :hover)
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*
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* Either content node may be nsnull, but not both
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*
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* @param aDocument The document being observed
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* @param aContent1 the piece of content that changed
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* @param aContent2 optional second piece of content that changed
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*/
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virtual void ContentStatesChanged(nsIDocument* aDocument,
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nsIContent* aContent1,
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nsIContent* aContent2,
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PRInt32 aStateMask) = 0;
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/**
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* A StyleSheet has just been added to the document. This method is
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* called automatically when a StyleSheet gets added to the
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* document, even if the stylesheet is not applicable. The
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* notification is passed on to all of the document observers.
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*
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* @param aDocument The document being observed
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* @param aStyleSheet the StyleSheet that has been added
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* @param aDocumentSheet True if sheet is in document's style sheet list,
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* false if sheet is not (i.e., UA or user sheet)
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*/
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virtual void StyleSheetAdded(nsIDocument *aDocument,
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nsIStyleSheet* aStyleSheet,
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PRBool aDocumentSheet) = 0;
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/**
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* A StyleSheet has just been removed from the document. This
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* method is called automatically when a StyleSheet gets removed
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* from the document, even if the stylesheet is not applicable. The
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* notification is passed on to all of the document observers.
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*
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* @param aDocument The document being observed
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* @param aStyleSheet the StyleSheet that has been removed
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* @param aDocumentSheet True if sheet is in document's style sheet list,
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* false if sheet is not (i.e., UA or user sheet)
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*/
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virtual void StyleSheetRemoved(nsIDocument *aDocument,
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nsIStyleSheet* aStyleSheet,
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PRBool aDocumentSheet) = 0;
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/**
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* A StyleSheet has just changed its applicable state.
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* This method is called automatically when the applicable state
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* of a StyleSheet gets changed. The style sheet passes this
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* notification to the document. The notification is passed on
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* to all of the document observers.
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*
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* @param aDocument The document being observed
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* @param aStyleSheet the StyleSheet that has changed state
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* @param aApplicable PR_TRUE if the sheet is applicable, PR_FALSE if
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* it is not applicable
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*/
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virtual void StyleSheetApplicableStateChanged(nsIDocument *aDocument,
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nsIStyleSheet* aStyleSheet,
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PRBool aApplicable) = 0;
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/**
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* A StyleRule has just been modified within a style sheet.
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* This method is called automatically when the rule gets
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* modified. The style sheet passes this notification to
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* the document. The notification is passed on to all of
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* the document observers.
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*
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* Since nsIStyleRule objects are immutable, there is a new object
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* replacing the old one. However, the use of this method (rather
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* than StyleRuleAdded and StyleRuleRemoved) implies that the new rule
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* matches the same elements and has the same priority (weight,
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* origin, specificity) as the old one. (However, if it is a CSS
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* style rule, there may be a change in whether it has an important
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* rule.)
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*
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* @param aDocument The document being observed
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* @param aStyleSheet the StyleSheet that contians the rule
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* @param aOldStyleRule The rule being removed. This rule may not be
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* fully valid anymore -- however, it can still
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* be used for pointer comparison and
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* |QueryInterface|.
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* @param aNewStyleRule The rule being added.
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*/
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virtual void StyleRuleChanged(nsIDocument *aDocument,
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nsIStyleSheet* aStyleSheet,
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nsIStyleRule* aOldStyleRule,
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nsIStyleRule* aNewStyleRule) = 0;
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/**
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* A StyleRule has just been added to a style sheet.
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* This method is called automatically when the rule gets
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* added to the sheet. The style sheet passes this
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* notification to the document. The notification is passed on
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* to all of the document observers.
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*
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* @param aDocument The document being observed
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* @param aStyleSheet the StyleSheet that has been modified
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* @param aStyleRule the rule that was added
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*/
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virtual void StyleRuleAdded(nsIDocument *aDocument,
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nsIStyleSheet* aStyleSheet,
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nsIStyleRule* aStyleRule) = 0;
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/**
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* A StyleRule has just been removed from a style sheet.
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* This method is called automatically when the rule gets
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* removed from the sheet. The style sheet passes this
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* notification to the document. The notification is passed on
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* to all of the document observers.
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*
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* @param aDocument The document being observed
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* @param aStyleSheet the StyleSheet that has been modified
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* @param aStyleRule the rule that was removed
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*/
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virtual void StyleRuleRemoved(nsIDocument *aDocument,
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nsIStyleSheet* aStyleSheet,
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nsIStyleRule* aStyleRule) = 0;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsIDocumentObserver, NS_IDOCUMENT_OBSERVER_IID)
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#define NS_DECL_NSIDOCUMENTOBSERVER \
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virtual void BeginUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType);\
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virtual void EndUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType);\
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virtual void BeginLoad(nsIDocument* aDocument); \
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virtual void EndLoad(nsIDocument* aDocument); \
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virtual void ContentStatesChanged(nsIDocument* aDocument, \
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nsIContent* aContent1, \
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nsIContent* aContent2, \
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PRInt32 aStateMask); \
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virtual void StyleSheetAdded(nsIDocument* aDocument, \
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nsIStyleSheet* aStyleSheet, \
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PRBool aDocumentSheet); \
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virtual void StyleSheetRemoved(nsIDocument* aDocument, \
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nsIStyleSheet* aStyleSheet, \
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PRBool aDocumentSheet); \
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virtual void StyleSheetApplicableStateChanged(nsIDocument* aDocument, \
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nsIStyleSheet* aStyleSheet,\
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PRBool aApplicable); \
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virtual void StyleRuleChanged(nsIDocument* aDocument, \
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nsIStyleSheet* aStyleSheet, \
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nsIStyleRule* aOldStyleRule, \
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nsIStyleRule* aNewStyleRule); \
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virtual void StyleRuleAdded(nsIDocument* aDocument, \
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nsIStyleSheet* aStyleSheet, \
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nsIStyleRule* aStyleRule); \
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virtual void StyleRuleRemoved(nsIDocument* aDocument, \
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nsIStyleSheet* aStyleSheet, \
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nsIStyleRule* aStyleRule); \
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NS_DECL_NSIMUTATIONOBSERVER
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#define NS_IMPL_NSIDOCUMENTOBSERVER_CORE_STUB(_class) \
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void \
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_class::BeginUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType) \
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{ \
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} \
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void \
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_class::EndUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType) \
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{ \
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} \
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NS_IMPL_NSIMUTATIONOBSERVER_CORE_STUB(_class)
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#define NS_IMPL_NSIDOCUMENTOBSERVER_LOAD_STUB(_class) \
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void \
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_class::BeginLoad(nsIDocument* aDocument) \
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{ \
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} \
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void \
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_class::EndLoad(nsIDocument* aDocument) \
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{ \
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}
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#define NS_IMPL_NSIDOCUMENTOBSERVER_STATE_STUB(_class) \
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void \
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_class::ContentStatesChanged(nsIDocument* aDocument, \
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nsIContent* aContent1, \
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nsIContent* aContent2, \
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PRInt32 aStateMask) \
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{ \
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}
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#define NS_IMPL_NSIDOCUMENTOBSERVER_CONTENT(_class) \
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NS_IMPL_NSIMUTATIONOBSERVER_CONTENT(_class)
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#define NS_IMPL_NSIDOCUMENTOBSERVER_STYLE_STUB(_class) \
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void \
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_class::StyleSheetAdded(nsIDocument* aDocument, \
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nsIStyleSheet* aStyleSheet, \
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PRBool aDocumentSheet) \
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{ \
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} \
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void \
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_class::StyleSheetRemoved(nsIDocument* aDocument, \
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nsIStyleSheet* aStyleSheet, \
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PRBool aDocumentSheet) \
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{ \
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} \
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void \
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_class::StyleSheetApplicableStateChanged(nsIDocument* aDocument, \
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nsIStyleSheet* aStyleSheet, \
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PRBool aApplicable) \
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{ \
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} \
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void \
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_class::StyleRuleChanged(nsIDocument* aDocument, \
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nsIStyleSheet* aStyleSheet, \
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nsIStyleRule* aOldStyleRule, \
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nsIStyleRule* aNewStyleRule) \
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{ \
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} \
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void \
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_class::StyleRuleAdded(nsIDocument* aDocument, \
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nsIStyleSheet* aStyleSheet, \
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nsIStyleRule* aStyleRule) \
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{ \
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} \
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void \
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_class::StyleRuleRemoved(nsIDocument* aDocument, \
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nsIStyleSheet* aStyleSheet, \
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nsIStyleRule* aStyleRule) \
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{ \
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}
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#endif /* nsIDocumentObserver_h___ */
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