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- /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla 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/MPL/
- *
- * 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 the Initial Developer are Copyright (C) 1998
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either of the GNU General Public License Version 2 or later (the "GPL"),
- * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
- #ifndef nsIDocumentObserver_h___
- #define nsIDocumentObserver_h___
-
- #include "nsISupports.h"
-
- class nsIAtom;
- class nsIContent;
- class nsIPresShell;
- class nsIStyleSheet;
- class nsIStyleRule;
- class nsString;
- class nsIDocument;
-
- #define NS_IDOCUMENT_OBSERVER_IID \
- { 0xb3f92460, 0x944c, 0x11d1, {0x93, 0x23, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32}}
-
- typedef PRUint32 nsUpdateType;
-
- #define UPDATE_CONTENT_MODEL 0x00000001
- #define UPDATE_STYLE 0x00000002
- #define UPDATE_CONTENT_STATE 0x00000004
- #define UPDATE_ALL (UPDATE_CONTENT_MODEL | UPDATE_STYLE | UPDATE_CONTENT_STATE)
-
- // Document observer interface
- class nsIDocumentObserver : public nsISupports
- {
- public:
- NS_DEFINE_STATIC_IID_ACCESSOR(NS_IDOCUMENT_OBSERVER_IID)
-
- /**
- * Notify that a content model update is beginning. This call can be
- * nested.
- */
- virtual void BeginUpdate(nsIDocument *aDocument,
- nsUpdateType aUpdateType) = 0;
-
- /**
- * Notify that a content model update is finished. This call can be
- * nested.
- */
- virtual void EndUpdate(nsIDocument *aDocument, nsUpdateType aUpdateType) = 0;
-
- /**
- * Notify the observer that a document load is beginning.
- */
- virtual void BeginLoad(nsIDocument *aDocument) = 0;
-
- /**
- * Notify the observer that a document load has finished. Note that
- * the associated reflow of the document will be done <b>before</b>
- * EndLoad is invoked, not after.
- */
- virtual void EndLoad(nsIDocument *aDocument) = 0;
-
- /**
- * Notify the observer that the document is being reflowed in
- * the given presentation shell.
- */
- virtual void BeginReflow(nsIDocument *aDocument, nsIPresShell* aShell) = 0;
-
- /**
- * Notify the observer that the document is done being reflowed in
- * the given presentation shell.
- */
- virtual void EndReflow(nsIDocument *aDocument, nsIPresShell* aShell) = 0;
-
- /**
- * Notification that the content model has changed. This method is
- * called automatically by content objects when their state is changed
- * (therefore there is normally no need to invoke this method
- * directly). The notification is passed to any
- * IDocumentObservers. The notification is passed on to all of the
- * document observers. <p>
- *
- * This notification is not sent when a piece of content is
- * added/removed from the document (the other notifications are used
- * for that).
- *
- * @param aDocument The document being observed
- * @param aContent the piece of content that changed
- * @param aAppend Whether the change was an append
- */
- virtual void CharacterDataChanged(nsIDocument *aDocument,
- nsIContent* aContent,
- PRBool aAppend) = 0;
-
- /**
- * Notification that the state of a content node has changed.
- * (ie: gained or lost focus, became active or hovered over)
- * This method is called automatically by content objects
- * when their state is changed (therefore there is normally
- * no need to invoke this method directly). The notification
- * is passed to any IDocumentObservers. The notification is
- * passed on to all of the document observers. <p>
- *
- * This notification is not sent when a piece of content is
- * added/removed from the document or the content itself changed
- * (the other notifications are used for that).
- *
- * The optional second content node is to allow optimization
- * of the case where state moves from one node to another
- * (as is likely for :focus and :hover)
- *
- * Either content node may be nsnull, but not both
- *
- * @param aDocument The document being observed
- * @param aContent1 the piece of content that changed
- * @param aContent2 optional second piece of content that changed
- */
- virtual void ContentStatesChanged(nsIDocument* aDocument,
- nsIContent* aContent1,
- nsIContent* aContent2,
- PRInt32 aStateMask) = 0;
-
- /**
- * Notification that the content model has changed. This method is called
- * automatically by content objects when an attribute's value has changed
- * (therefore there is normally no need to invoke this method directly). The
- * notification is passed to any IDocumentObservers document observers. <p>
- *
- * @param aDocument The document being observed
- * @param aContent the piece of content whose attribute changed
- * @param aAttribute the atom name of the attribute
- * @param aModType Whether or not the attribute was added, changed, or removed.
- * The constants are defined in nsIDOMMutationEvent.h.
- */
- virtual void AttributeChanged(nsIDocument *aDocument,
- nsIContent* aContent,
- PRInt32 aNameSpaceID,
- nsIAtom* aAttribute,
- PRInt32 aModType) = 0;
-
- /**
- * Notifcation that the content model has had data appended to the
- * given content object. This method is called automatically by the
- * content container objects when a new content object is appended to
- * the container (therefore there is normally no need to invoke this
- * method directly). The notification is passed on to all of the
- * document observers.
- *
- * @param aDocument The document being observed
- * @param aContainer the container that had a new child appended
- * @param aNewIndexInContainer the index in the container of the first
- * new child
- */
- virtual void ContentAppended(nsIDocument *aDocument,
- nsIContent* aContainer,
- PRInt32 aNewIndexInContainer) = 0;
-
- /**
- * Notification that content has been inserted. This method is called
- * automatically by the content container objects when a new content
- * object is inserted in the container (therefore there is normally no
- * need to invoke this method directly). The notification is passed on
- * to all of the document observers.
- *
- * @param aDocument The document being observed
- * @param aContainer the container that now contains aChild
- * @param aChild the child that was inserted
- * @param aIndexInContainer the index of the child in the container
- */
- virtual void ContentInserted(nsIDocument *aDocument,
- nsIContent* aContainer,
- nsIContent* aChild,
- PRInt32 aIndexInContainer) = 0;
-
- /**
- * Content has just been removed. This method is called automatically
- * by content container objects when a content object has just been
- * removed from the container (therefore there is normally no need to
- * invoke this method directly). The notification is passed on to all
- * of the document observers.
- *
- * @param aDocument The document being observed
- * @param aContainer the container that had a child removed
- * @param aChild the child that was just removed
- * @param aIndexInContainer the index of the child in the container
- * before it was removed
- */
- virtual void ContentRemoved(nsIDocument *aDocument,
- nsIContent* aContainer,
- nsIContent* aChild,
- PRInt32 aIndexInContainer) = 0;
-
- /**
- * A StyleSheet has just been added to the document. This method is
- * called automatically when a StyleSheet gets added to the
- * document, even if the stylesheet is not applicable. The
- * notification is passed on to all of the document observers.
- *
- * @param aDocument The document being observed
- * @param aStyleSheet the StyleSheet that has been added
- * @param aDocumentSheet True if sheet is in document's style sheet list,
- * false if sheet is not (i.e., UA or user sheet)
- */
- virtual void StyleSheetAdded(nsIDocument *aDocument,
- nsIStyleSheet* aStyleSheet,
- PRBool aDocumentSheet) = 0;
-
- /**
- * A StyleSheet has just been removed from the document. This
- * method is called automatically when a StyleSheet gets removed
- * from the document, even if the stylesheet is not applicable. The
- * notification is passed on to all of the document observers.
- *
- * @param aDocument The document being observed
- * @param aStyleSheet the StyleSheet that has been removed
- * @param aDocumentSheet True if sheet is in document's style sheet list,
- * false if sheet is not (i.e., UA or user sheet)
- */
- virtual void StyleSheetRemoved(nsIDocument *aDocument,
- nsIStyleSheet* aStyleSheet,
- PRBool aDocumentSheet) = 0;
-
- /**
- * A StyleSheet has just changed its applicable state.
- * This method is called automatically when the applicable state
- * of a StyleSheet gets changed. The style sheet passes this
- * notification to the document. The notification is passed on
- * to all of the document observers.
- *
- * @param aDocument The document being observed
- * @param aStyleSheet the StyleSheet that has changed state
- * @param aApplicable PR_TRUE if the sheet is applicable, PR_FALSE if
- * it is not applicable
- */
- virtual void StyleSheetApplicableStateChanged(nsIDocument *aDocument,
- nsIStyleSheet* aStyleSheet,
- PRBool aApplicable) = 0;
-
- /**
- * A StyleRule has just been modified within a style sheet.
- * This method is called automatically when the rule gets
- * modified. The style sheet passes this notification to
- * the document. The notification is passed on to all of
- * the document observers.
- *
- * Since nsIStyleRule objects are immutable, there is a new object
- * replacing the old one. However, the use of this method (rather
- * than StyleRuleAdded and StyleRuleRemoved) implies that the new rule
- * matches the same elements and has the same priority (weight,
- * origin, specificity) as the old one. (However, if it is a CSS
- * style rule, there may be a change in whether it has an important
- * rule.)
- *
- * @param aDocument The document being observed
- * @param aStyleSheet the StyleSheet that contians the rule
- * @param aOldStyleRule The rule being removed. This rule may not be
- * fully valid anymore -- however, it can still
- * be used for pointer comparison and
- * |QueryInterface|.
- * @param aNewStyleRule The rule being added.
- */
- virtual void StyleRuleChanged(nsIDocument *aDocument,
- nsIStyleSheet* aStyleSheet,
- nsIStyleRule* aOldStyleRule,
- nsIStyleRule* aNewStyleRule) = 0;
-
- /**
- * A StyleRule has just been added to a style sheet.
- * This method is called automatically when the rule gets
- * added to the sheet. The style sheet passes this
- * notification to the document. The notification is passed on
- * to all of the document observers.
- *
- * @param aDocument The document being observed
- * @param aStyleSheet the StyleSheet that has been modified
- * @param aStyleRule the rule that was added
- */
- virtual void StyleRuleAdded(nsIDocument *aDocument,
- nsIStyleSheet* aStyleSheet,
- nsIStyleRule* aStyleRule) = 0;
-
- /**
- * A StyleRule has just been removed from a style sheet.
- * This method is called automatically when the rule gets
- * removed from the sheet. The style sheet passes this
- * notification to the document. The notification is passed on
- * to all of the document observers.
- *
- * @param aDocument The document being observed
- * @param aStyleSheet the StyleSheet that has been modified
- * @param aStyleRule the rule that was removed
- */
- virtual void StyleRuleRemoved(nsIDocument *aDocument,
- nsIStyleSheet* aStyleSheet,
- nsIStyleRule* aStyleRule) = 0;
-
- /**
- * The document is in the process of being destroyed.
- * This method is called automatically during document
- * destruction.
- *
- * @param aDocument The document being observed
- */
- virtual void DocumentWillBeDestroyed(nsIDocument *aDocument) = 0;
- };
-
- #define NS_DECL_NSIDOCUMENTOBSERVER \
- virtual void BeginUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType);\
- virtual void EndUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType);\
- virtual void BeginLoad(nsIDocument* aDocument); \
- virtual void EndLoad(nsIDocument* aDocument); \
- virtual void BeginReflow(nsIDocument* aDocument, \
- nsIPresShell* aShell); \
- virtual void EndReflow(nsIDocument* aDocument, \
- nsIPresShell* aShell); \
- virtual void CharacterDataChanged(nsIDocument* aDocument, \
- nsIContent* aContent, \
- PRBool aAppend); \
- virtual void ContentStatesChanged(nsIDocument* aDocument, \
- nsIContent* aContent1, \
- nsIContent* aContent2, \
- PRInt32 aStateMask); \
- virtual void AttributeChanged(nsIDocument* aDocument, \
- nsIContent* aContent, \
- PRInt32 aNameSpaceID, \
- nsIAtom* aAttribute, \
- PRInt32 aModType); \
- virtual void ContentAppended(nsIDocument* aDocument, \
- nsIContent* aContainer, \
- PRInt32 aNewIndexInContainer); \
- virtual void ContentInserted(nsIDocument* aDocument, \
- nsIContent* aContainer, \
- nsIContent* aChild, \
- PRInt32 aIndexInContainer); \
- virtual void ContentRemoved(nsIDocument* aDocument, \
- nsIContent* aContainer, \
- nsIContent* aChild, \
- PRInt32 aIndexInContainer); \
- virtual void StyleSheetAdded(nsIDocument* aDocument, \
- nsIStyleSheet* aStyleSheet, \
- PRBool aDocumentSheet); \
- virtual void StyleSheetRemoved(nsIDocument* aDocument, \
- nsIStyleSheet* aStyleSheet, \
- PRBool aDocumentSheet); \
- virtual void StyleSheetApplicableStateChanged(nsIDocument* aDocument, \
- nsIStyleSheet* aStyleSheet,\
- PRBool aApplicable); \
- virtual void StyleRuleChanged(nsIDocument* aDocument, \
- nsIStyleSheet* aStyleSheet, \
- nsIStyleRule* aOldStyleRule, \
- nsIStyleRule* aNewStyleRule); \
- virtual void StyleRuleAdded(nsIDocument* aDocument, \
- nsIStyleSheet* aStyleSheet, \
- nsIStyleRule* aStyleRule); \
- virtual void StyleRuleRemoved(nsIDocument* aDocument, \
- nsIStyleSheet* aStyleSheet, \
- nsIStyleRule* aStyleRule); \
- virtual void DocumentWillBeDestroyed(nsIDocument* aDocument); \
-
-
- #define NS_IMPL_NSIDOCUMENTOBSERVER_CORE_STUB(_class) \
- void \
- _class::BeginUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType) \
- { \
- } \
- void \
- _class::EndUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType) \
- { \
- } \
- void \
- _class::DocumentWillBeDestroyed(nsIDocument* aDocument) \
- { \
- }
-
- #define NS_IMPL_NSIDOCUMENTOBSERVER_LOAD_STUB(_class) \
- void \
- _class::BeginLoad(nsIDocument* aDocument) \
- { \
- } \
- void \
- _class::EndLoad(nsIDocument* aDocument) \
- { \
- }
-
- #define NS_IMPL_NSIDOCUMENTOBSERVER_REFLOW_STUB(_class) \
- void \
- _class::BeginReflow(nsIDocument* aDocument, \
- nsIPresShell* aShell) \
- { \
- } \
- void \
- _class::EndReflow(nsIDocument* aDocument, \
- nsIPresShell* aShell) \
- { \
- }
-
- #define NS_IMPL_NSIDOCUMENTOBSERVER_STATE_STUB(_class) \
- void \
- _class::ContentStatesChanged(nsIDocument* aDocument, \
- nsIContent* aContent1, \
- nsIContent* aContent2, \
- PRInt32 aStateMask) \
- { \
- }
-
- #define NS_IMPL_NSIDOCUMENTOBSERVER_CONTENT(_class) \
- void \
- _class::CharacterDataChanged(nsIDocument* aDocument, \
- nsIContent* aContent, \
- PRBool aAppend) \
- { \
- } \
- void \
- _class::AttributeChanged(nsIDocument* aDocument, \
- nsIContent* aContent, \
- PRInt32 aNameSpaceID, \
- nsIAtom* aAttribute, \
- PRInt32 aModType) \
- { \
- } \
- void \
- _class::ContentAppended(nsIDocument* aDocument, \
- nsIContent* aContainer, \
- PRInt32 aNewIndexInContainer) \
- { \
- } \
- void \
- _class::ContentInserted(nsIDocument* aDocument, \
- nsIContent* aContainer, \
- nsIContent* aChild, \
- PRInt32 aIndexInContainer) \
- { \
- } \
- void \
- _class::ContentRemoved(nsIDocument* aDocument, \
- nsIContent* aContainer, \
- nsIContent* aChild, \
- PRInt32 aIndexInContainer) \
- { \
- }
-
- #define NS_IMPL_NSIDOCUMENTOBSERVER_STYLE_STUB(_class) \
- void \
- _class::StyleSheetAdded(nsIDocument* aDocument, \
- nsIStyleSheet* aStyleSheet, \
- PRBool aDocumentSheet) \
- { \
- } \
- void \
- _class::StyleSheetRemoved(nsIDocument* aDocument, \
- nsIStyleSheet* aStyleSheet, \
- PRBool aDocumentSheet) \
- { \
- } \
- void \
- _class::StyleSheetApplicableStateChanged(nsIDocument* aDocument, \
- nsIStyleSheet* aStyleSheet, \
- PRBool aApplicable) \
- { \
- } \
- void \
- _class::StyleRuleChanged(nsIDocument* aDocument, \
- nsIStyleSheet* aStyleSheet, \
- nsIStyleRule* aOldStyleRule, \
- nsIStyleRule* aNewStyleRule) \
- { \
- } \
- void \
- _class::StyleRuleAdded(nsIDocument* aDocument, \
- nsIStyleSheet* aStyleSheet, \
- nsIStyleRule* aStyleRule) \
- { \
- } \
- void \
- _class::StyleRuleRemoved(nsIDocument* aDocument, \
- nsIStyleSheet* aStyleSheet, \
- nsIStyleRule* aStyleRule) \
- { \
- }
-
- #endif /* nsIDocumentObserver_h___ */
-