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101 lines
3.9 KiB
Plaintext
101 lines
3.9 KiB
Plaintext
/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsISupports.idl"
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interface nsIURI;
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/**
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* nsISHistoryListener defines the interface one can implement to receive
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* notifications about activities in session history and to be able to
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* cancel them.
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*
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* A session history listener will be notified when pages are added, removed
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* and loaded from session history. It can prevent any action (except adding
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* a new session history entry) from happening by returning false from the
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* corresponding callback method.
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*
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* A session history listener can be registered on a particular nsISHistory
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* instance via the nsISHistory::addSHistoryListener() method.
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*/
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[scriptable, uuid(125c0833-746a-400e-9b89-d2d18545c08a)]
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interface nsISHistoryListener : nsISupports
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{
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/**
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* Called when a new document is added to session history. New documents are
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* added to session history by docshell when new pages are loaded in a frame
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* or content area, for example via nsIWebNavigation::loadURI()
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*
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* @param aNewURI The URI of the document to be added to session history.
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*/
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void OnHistoryNewEntry(in nsIURI aNewURI);
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/**
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* Called when navigating to a previous session history entry, for example
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* due to a nsIWebNavigation::goBack() call.
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*
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* @param aBackURI The URI of the session history entry being navigated to.
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* @return Whether the operation can proceed.
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*/
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boolean OnHistoryGoBack(in nsIURI aBackURI);
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/**
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* Called when navigating to a next session history entry, for example
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* due to a nsIWebNavigation::goForward() call.
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*
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* @param aForwardURI The URI of the session history entry being navigated to.
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* @return Whether the operation can proceed.
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*/
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boolean OnHistoryGoForward(in nsIURI aForwardURI);
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/**
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* Called when the current document is reloaded, for example due to a
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* nsIWebNavigation::reload() call.
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*
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* @param aReloadURI The URI of the document to be reloaded.
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* @param aReloadFlags Flags that indicate how the document is to be
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* refreshed. See constants on the nsIWebNavigation
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* interface.
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* @return Whether the operation can proceed.
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*
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* @see nsIWebNavigation
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*/
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boolean OnHistoryReload(in nsIURI aReloadURI, in unsigned long aReloadFlags);
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/**
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* Called when navigating to a session history entry by index, for example,
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* when nsIWebNavigation::gotoIndex() is called.
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*
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* @param aIndex The index in session history of the entry to be loaded.
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* @param aGotoURI The URI of the session history entry to be loaded.
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* @return Whether the operation can proceed.
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*/
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boolean OnHistoryGotoIndex(in long aIndex, in nsIURI aGotoURI);
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/**
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* Called when entries are removed from session history. Entries can be
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* removed from session history for various reasons, for example to control
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* the memory usage of the browser, to prevent users from loading documents
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* from history, to erase evidence of prior page loads, etc.
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*
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* To purge documents from session history call nsISHistory::PurgeHistory()
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*
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* @param aNumEntries The number of entries to be removed from session history.
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* @return Whether the operation can proceed.
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*/
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boolean OnHistoryPurge(in long aNumEntries);
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/**
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* Called when an entry is replaced in the session history. Entries are
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* replaced when navigating away from non-persistent history entries (such as
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* about pages) and when history.replaceState is called.
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*
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* @param aIndex The index in session history of the entry being
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* replaced
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*/
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void OnHistoryReplaceEntry(in long aIndex);
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};
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