tor-browser

IHistory.h (5338B)

---

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_IHistory_h_
#define mozilla_IHistory_h_

#include "nsISupports.h"
#include "nsURIHashKey.h"
#include "nsTHashSet.h"
#include "nsTObserverArray.h"

class nsIURI;
class nsIWidget;

namespace mozilla {

namespace dom {
class ContentParent;
class Document;
class Link;
}  // namespace dom

// 0057c9d3-b98e-4933-bdc5-0275d06705e1
#define IHISTORY_IID \
 {0x0057c9d3, 0xb98e, 0x4933, {0xbd, 0xc5, 0x02, 0x75, 0xd0, 0x67, 0x05, 0xe1}}

class IHistory : public nsISupports {
public:
 NS_INLINE_DECL_STATIC_IID(IHISTORY_IID)

 using ContentParentSet = nsTHashSet<RefPtr<dom::ContentParent>>;

 /**
  * Registers the Link for notifications about the visited-ness of aURI.
  * Consumers should assume that the URI is unvisited after calling this, and
  * they will be notified if that state (unvisited) changes by having
  * VisitedQueryFinished called on themselves. Note that it may call
  * synchronously if the answer is already known.
  *
  * @note VisitedQueryFinished must not call RegisterVisitedCallback or
  *       UnregisterVisitedCallback.
  *
  * @pre aURI must not be null.
  * @pre aLink may be null only in the parent (chrome) process.
  *
  * @param aURI
  *        The URI to check.
  * @param aLink
  *        The link to update whenever the history status changes.  The
  *        implementation will only hold onto a raw pointer, so if this
  *        object should be destroyed, be sure to call
  *        UnregisterVistedCallback first.
  */
 virtual void RegisterVisitedCallback(nsIURI* aURI, dom::Link* aLink) = 0;

 /**
  * Schedules a single visited query from a given child process.
  *
  * @param aURI the URI to query.
  * @param ContentParent the process interested in knowing about the visited
  *                      state of this URI.
  */
 virtual void ScheduleVisitedQuery(nsIURI* aURI, dom::ContentParent*) = 0;

 /**
  * Unregisters a previously registered Link object.  This must be called
  * before destroying the registered object, and asserts when misused.
  *
  * @pre aURI must not be null.
  * @pre aLink must not be null.
  *
  * @param aURI
  *        The URI that aLink was registered for.
  * @param aLink
  *        The link object to unregister for aURI.
  */
 virtual void UnregisterVisitedCallback(nsIURI* aURI, dom::Link* aLink) = 0;

 enum class VisitedStatus : uint8_t {
   Unknown,
   Visited,
   Unvisited,
 };

 /**
  * Notifies about the visited status of a given URI. The visited status cannot
  * be unknown, otherwise there's no point in notifying of anything.
  *
  * @param ContentParentSet a set of content processes that are interested on
  *                         this change. If null, it is broadcasted to all
  *                         child processes.
  */
 virtual void NotifyVisited(nsIURI*, VisitedStatus,
                            const ContentParentSet* = nullptr) = 0;

 enum VisitFlags {
   /**
    * Indicates whether the URI was loaded in a top-level window.
    */
   TOP_LEVEL = 1 << 0,
   /**
    * Indicates whether the URI is the target of a permanent redirect.
    */
   REDIRECT_PERMANENT = 1 << 1,
   /**
    * Indicates whether the URI is the target of a temporary redirect.
    */
   REDIRECT_TEMPORARY = 1 << 2,
   /**
    * Indicates the URI will redirect  (Response code 3xx).
    */
   REDIRECT_SOURCE = 1 << 3,
   /**
    * Indicates the URI caused an error that is unlikely fixable by a
    * retry, like a not found or unfetchable page.
    */
   UNRECOVERABLE_ERROR = 1 << 4,
   /**
    * If REDIRECT_SOURCE is set, this indicates that the redirect is permanent.
    * Note this differs from REDIRECT_PERMANENT because that one refers to how
    * we reached the URI, while this is used when the URI itself redirects.
    */
   REDIRECT_SOURCE_PERMANENT = 1 << 5,
   /**
    * If REDIRECT_SOURCE is set, this indicates that this is a special redirect
    * caused by HSTS or HTTPS-Only/First upgrading to the HTTPS version of the
    * URI.
    */
   REDIRECT_SOURCE_UPGRADED = 1 << 6
 };

 /**
  * Adds a history visit for the URI.
  *
  * @pre aURI must not be null.
  *
  * @param aWidget
  *        The widget for the DocShell.
  * @param aURI
  *        The URI of the page being visited.
  * @param aLastVisitedURI
  *        The URI of the last visit in the chain.
  * @param aFlags
  *        The VisitFlags describing this visit.
  * @param aBrowserId
  *        The id of browser used for this visit.
  */
 NS_IMETHOD VisitURI(nsIWidget* aWidget, nsIURI* aURI, nsIURI* aLastVisitedURI,
                     uint32_t aFlags, uint64_t aBrowserId) = 0;

 /**
  * Set the title of the URI.
  *
  * @pre aURI must not be null.
  *
  * @param aURI
  *        The URI to set the title for.
  * @param aTitle
  *        The title string.
  */
 NS_IMETHOD SetURITitle(nsIURI* aURI, const nsAString& aTitle) = 0;
};

}  // namespace mozilla

#endif  // mozilla_IHistory_h_