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gecko-dev/toolkit/components/places/History.cpp

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/* -*- 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/. */
#include "mozilla/ArrayUtils.h"
#include "mozilla/Attributes.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/ContentParent.h"
#include "nsXULAppAPI.h"
#include "History.h"
#include "nsNavHistory.h"
#include "nsNavBookmarks.h"
#include "nsAnnotationService.h"
#include "Helpers.h"
#include "PlaceInfo.h"
#include "VisitInfo.h"
#include "nsPlacesMacros.h"
#include "mozilla/storage.h"
#include "mozilla/dom/Link.h"
#include "nsDocShellCID.h"
#include "mozilla/Services.h"
#include "nsThreadUtils.h"
#include "nsNetUtil.h"
#include "nsIFileURL.h"
#include "nsIXPConnect.h"
#include "mozilla/unused.h"
#include "nsContentUtils.h" // for nsAutoScriptBlocker
#include "nsJSUtils.h"
#include "mozilla/ipc/URIUtils.h"
#include "nsPrintfCString.h"
#include "nsTHashtable.h"
#include "jsapi.h"
// Initial size for the cache holding visited status observers.
#define VISIT_OBSERVERS_INITIAL_CACHE_LENGTH 64
// Initial length for the visits removal hash.
#define VISITS_REMOVAL_INITIAL_HASH_LENGTH 64
using namespace mozilla::dom;
using namespace mozilla::ipc;
using mozilla::unused;
namespace mozilla {
namespace places {
////////////////////////////////////////////////////////////////////////////////
//// Global Defines
#define URI_VISITED "visited"
#define URI_NOT_VISITED "not visited"
#define URI_VISITED_RESOLUTION_TOPIC "visited-status-resolution"
// Observer event fired after a visit has been registered in the DB.
#define URI_VISIT_SAVED "uri-visit-saved"
#define DESTINATIONFILEURI_ANNO \
NS_LITERAL_CSTRING("downloads/destinationFileURI")
#define DESTINATIONFILENAME_ANNO \
NS_LITERAL_CSTRING("downloads/destinationFileName")
////////////////////////////////////////////////////////////////////////////////
//// VisitData
struct VisitData {
VisitData()
: placeId(0)
, visitId(0)
, hidden(true)
, typed(false)
, transitionType(UINT32_MAX)
, visitTime(0)
, frecency(-1)
, titleChanged(false)
, shouldUpdateFrecency(true)
{
guid.SetIsVoid(true);
title.SetIsVoid(true);
}
explicit VisitData(nsIURI* aURI,
nsIURI* aReferrer = nullptr)
: placeId(0)
, visitId(0)
, hidden(true)
, typed(false)
, transitionType(UINT32_MAX)
, visitTime(0)
, frecency(-1)
, titleChanged(false)
, shouldUpdateFrecency(true)
{
(void)aURI->GetSpec(spec);
(void)GetReversedHostname(aURI, revHost);
if (aReferrer) {
(void)aReferrer->GetSpec(referrerSpec);
}
guid.SetIsVoid(true);
title.SetIsVoid(true);
}
/**
* Sets the transition type of the visit, as well as if it was typed.
*
* @param aTransitionType
* The transition type constant to set. Must be one of the
* TRANSITION_ constants on nsINavHistoryService.
*/
void SetTransitionType(uint32_t aTransitionType)
{
typed = aTransitionType == nsINavHistoryService::TRANSITION_TYPED;
transitionType = aTransitionType;
}
/**
* Determines if this refers to the same url as aOther, and updates aOther
* with missing information if so.
*
* @param aOther
* The other place to check against.
* @return true if this is a visit for the same place as aOther, false
* otherwise.
*/
bool IsSamePlaceAs(VisitData& aOther)
{
if (!spec.Equals(aOther.spec)) {
return false;
}
aOther.placeId = placeId;
aOther.guid = guid;
return true;
}
int64_t placeId;
nsCString guid;
int64_t visitId;
nsCString spec;
nsString revHost;
bool hidden;
bool typed;
uint32_t transitionType;
PRTime visitTime;
int32_t frecency;
/**
* Stores the title. If this is empty (IsEmpty() returns true), then the
* title should be removed from the Place. If the title is void (IsVoid()
* returns true), then no title has been set on this object, and titleChanged
* should remain false.
*/
nsString title;
nsCString referrerSpec;
// TODO bug 626836 hook up hidden and typed change tracking too!
bool titleChanged;
// Indicates whether frecency should be updated for this visit.
bool shouldUpdateFrecency;
};
////////////////////////////////////////////////////////////////////////////////
//// RemoveVisitsFilter
/**
* Used to store visit filters for RemoveVisits.
*/
struct RemoveVisitsFilter {
RemoveVisitsFilter()
: transitionType(UINT32_MAX)
{
}
uint32_t transitionType;
};
////////////////////////////////////////////////////////////////////////////////
//// PlaceHashKey
class PlaceHashKey : public nsCStringHashKey
{
public:
explicit PlaceHashKey(const nsACString& aSpec)
: nsCStringHashKey(&aSpec)
, mVisitCount(0)
, mBookmarked(false)
#ifdef DEBUG
, mIsInitialized(false)
#endif
{
}
explicit PlaceHashKey(const nsACString* aSpec)
: nsCStringHashKey(aSpec)
, mVisitCount(0)
, mBookmarked(false)
#ifdef DEBUG
, mIsInitialized(false)
#endif
{
}
PlaceHashKey(const PlaceHashKey& aOther)
: nsCStringHashKey(&aOther.GetKey())
{
MOZ_ASSERT(false, "Do not call me!");
}
void SetProperties(uint32_t aVisitCount, bool aBookmarked)
{
mVisitCount = aVisitCount;
mBookmarked = aBookmarked;
#ifdef DEBUG
mIsInitialized = true;
#endif
}
uint32_t VisitCount() const
{
#ifdef DEBUG
MOZ_ASSERT(mIsInitialized, "PlaceHashKey::mVisitCount not set");
#endif
return mVisitCount;
}
bool IsBookmarked() const
{
#ifdef DEBUG
MOZ_ASSERT(mIsInitialized, "PlaceHashKey::mBookmarked not set");
#endif
return mBookmarked;
}
// Array of VisitData objects.
nsTArray<VisitData> mVisits;
private:
// Visit count for this place.
uint32_t mVisitCount;
// Whether this place is bookmarked.
bool mBookmarked;
#ifdef DEBUG
// Whether previous attributes are set.
bool mIsInitialized;
#endif
};
////////////////////////////////////////////////////////////////////////////////
//// Anonymous Helpers
namespace {
/**
* Convert the given js value to a js array.
*
* @param [in] aValue
* the JS value to convert.
* @param [in] aCtx
* The JSContext for aValue.
* @param [out] _array
* the JS array.
* @param [out] _arrayLength
* _array's length.
*/
nsresult
GetJSArrayFromJSValue(JS::Handle<JS::Value> aValue,
JSContext* aCtx,
JS::MutableHandle<JSObject*> _array,
uint32_t* _arrayLength) {
if (aValue.isObjectOrNull()) {
JS::Rooted<JSObject*> val(aCtx, aValue.toObjectOrNull());
if (JS_IsArrayObject(aCtx, val)) {
_array.set(val);
(void)JS_GetArrayLength(aCtx, _array, _arrayLength);
NS_ENSURE_ARG(*_arrayLength > 0);
return NS_OK;
}
}
// Build a temporary array to store this one item so the code below can
// just loop.
*_arrayLength = 1;
_array.set(JS_NewArrayObject(aCtx, 0));
NS_ENSURE_TRUE(_array, NS_ERROR_OUT_OF_MEMORY);
bool rc = JS_DefineElement(aCtx, _array, 0, aValue, 0);
NS_ENSURE_TRUE(rc, NS_ERROR_UNEXPECTED);
return NS_OK;
}
/**
* Attemps to convert a given js value to a nsIURI object.
* @param aCtx
* The JSContext for aValue.
* @param aValue
* The JS value to convert.
* @return the nsIURI object, or null if aValue is not a nsIURI object.
*/
already_AddRefed<nsIURI>
GetJSValueAsURI(JSContext* aCtx,
const JS::Value& aValue) {
if (!aValue.isPrimitive()) {
nsCOMPtr<nsIXPConnect> xpc = mozilla::services::GetXPConnect();
nsCOMPtr<nsIXPConnectWrappedNative> wrappedObj;
nsresult rv = xpc->GetWrappedNativeOfJSObject(aCtx, aValue.toObjectOrNull(),
getter_AddRefs(wrappedObj));
NS_ENSURE_SUCCESS(rv, nullptr);
nsCOMPtr<nsIURI> uri = do_QueryWrappedNative(wrappedObj);
return uri.forget();
}
return nullptr;
}
/**
* Obtains an nsIURI from the "uri" property of a JSObject.
*
* @param aCtx
* The JSContext for aObject.
* @param aObject
* The JSObject to get the URI from.
* @param aProperty
* The name of the property to get the URI from.
* @return the URI if it exists.
*/
already_AddRefed<nsIURI>
GetURIFromJSObject(JSContext* aCtx,
JS::Handle<JSObject *> aObject,
const char* aProperty)
{
JS::Rooted<JS::Value> uriVal(aCtx);
bool rc = JS_GetProperty(aCtx, aObject, aProperty, &uriVal);
NS_ENSURE_TRUE(rc, nullptr);
return GetJSValueAsURI(aCtx, uriVal);
}
/**
* Attemps to convert a JS value to a string.
* @param aCtx
* The JSContext for aObject.
* @param aValue
* The JS value to convert.
* @param _string
* The string to populate with the value, or set it to void.
*/
void
GetJSValueAsString(JSContext* aCtx,
const JS::Value& aValue,
nsString& _string) {
if (aValue.isUndefined() ||
!(aValue.isNull() || aValue.isString())) {
_string.SetIsVoid(true);
return;
}
// |null| in JS maps to the empty string.
if (aValue.isNull()) {
_string.Truncate();
return;
}
if (!AssignJSString(aCtx, _string, aValue.toString())) {
_string.SetIsVoid(true);
}
}
/**
* Obtains the specified property of a JSObject.
*
* @param aCtx
* The JSContext for aObject.
* @param aObject
* The JSObject to get the string from.
* @param aProperty
* The property to get the value from.
* @param _string
* The string to populate with the value, or set it to void.
*/
void
GetStringFromJSObject(JSContext* aCtx,
JS::Handle<JSObject *> aObject,
const char* aProperty,
nsString& _string)
{
JS::Rooted<JS::Value> val(aCtx);
bool rc = JS_GetProperty(aCtx, aObject, aProperty, &val);
if (!rc) {
_string.SetIsVoid(true);
return;
}
else {
GetJSValueAsString(aCtx, val, _string);
}
}
/**
* Obtains the specified property of a JSObject.
*
* @param aCtx
* The JSContext for aObject.
* @param aObject
* The JSObject to get the int from.
* @param aProperty
* The property to get the value from.
* @param _int
* The integer to populate with the value on success.
*/
template <typename IntType>
nsresult
GetIntFromJSObject(JSContext* aCtx,
JS::Handle<JSObject *> aObject,
const char* aProperty,
IntType* _int)
{
JS::Rooted<JS::Value> value(aCtx);
bool rc = JS_GetProperty(aCtx, aObject, aProperty, &value);
NS_ENSURE_TRUE(rc, NS_ERROR_UNEXPECTED);
if (value.isUndefined()) {
return NS_ERROR_INVALID_ARG;
}
NS_ENSURE_ARG(value.isPrimitive());
NS_ENSURE_ARG(value.isNumber());
double num;
rc = JS::ToNumber(aCtx, value, &num);
NS_ENSURE_TRUE(rc, NS_ERROR_UNEXPECTED);
NS_ENSURE_ARG(IntType(num) == num);
*_int = IntType(num);
return NS_OK;
}
/**
* Obtains the specified property of a JSObject.
*
* @pre aArray must be an Array object.
*
* @param aCtx
* The JSContext for aArray.
* @param aArray
* The JSObject to get the object from.
* @param aIndex
* The index to get the object from.
* @param objOut
* Set to the JSObject pointer on success.
*/
nsresult
GetJSObjectFromArray(JSContext* aCtx,
JS::Handle<JSObject*> aArray,
uint32_t aIndex,
JS::MutableHandle<JSObject*> objOut)
{
NS_PRECONDITION(JS_IsArrayObject(aCtx, aArray),
"Must provide an object that is an array!");
JS::Rooted<JS::Value> value(aCtx);
bool rc = JS_GetElement(aCtx, aArray, aIndex, &value);
NS_ENSURE_TRUE(rc, NS_ERROR_UNEXPECTED);
NS_ENSURE_ARG(!value.isPrimitive());
objOut.set(&value.toObject());
return NS_OK;
}
class VisitedQuery final : public AsyncStatementCallback,
public mozIStorageCompletionCallback
{
public:
NS_DECL_ISUPPORTS_INHERITED
static nsresult Start(nsIURI* aURI,
mozIVisitedStatusCallback* aCallback=nullptr)
{
NS_PRECONDITION(aURI, "Null URI");
// If we are a content process, always remote the request to the
// parent process.
if (XRE_IsContentProcess()) {
URIParams uri;
SerializeURI(aURI, uri);
mozilla::dom::ContentChild* cpc =
mozilla::dom::ContentChild::GetSingleton();
NS_ASSERTION(cpc, "Content Protocol is NULL!");
(void)cpc->SendStartVisitedQuery(uri);
return NS_OK;
}
nsMainThreadPtrHandle<mozIVisitedStatusCallback>
callback(new nsMainThreadPtrHolder<mozIVisitedStatusCallback>(aCallback));
nsNavHistory* navHistory = nsNavHistory::GetHistoryService();
NS_ENSURE_STATE(navHistory);
if (navHistory->hasEmbedVisit(aURI)) {
nsRefPtr<VisitedQuery> cb = new VisitedQuery(aURI, callback, true);
NS_ENSURE_TRUE(cb, NS_ERROR_OUT_OF_MEMORY);
// As per IHistory contract, we must notify asynchronously.
nsCOMPtr<nsIRunnable> event =
NS_NewRunnableMethod(cb, &VisitedQuery::NotifyVisitedStatus);
NS_DispatchToMainThread(event);
return NS_OK;
}
History* history = History::GetService();
NS_ENSURE_STATE(history);
nsRefPtr<VisitedQuery> cb = new VisitedQuery(aURI, callback);
NS_ENSURE_TRUE(cb, NS_ERROR_OUT_OF_MEMORY);
nsresult rv = history->GetIsVisitedStatement(cb);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
// Note: the return value matters here. We call into this method, it's not
// just xpcom boilerplate.
NS_IMETHOD Complete(nsresult aResult, nsISupports* aStatement) override
{
NS_ENSURE_SUCCESS(aResult, aResult);
nsCOMPtr<mozIStorageAsyncStatement> stmt = do_QueryInterface(aStatement);
NS_ENSURE_STATE(stmt);
// Bind by index for performance.
nsresult rv = URIBinder::Bind(stmt, 0, mURI);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<mozIStoragePendingStatement> handle;
return stmt->ExecuteAsync(this, getter_AddRefs(handle));
}
NS_IMETHOD HandleResult(mozIStorageResultSet* aResults) override
{
// If this method is called, we've gotten results, which means we have a
// visit.
mIsVisited = true;
return NS_OK;
}
NS_IMETHOD HandleError(mozIStorageError* aError) override
{
// mIsVisited is already set to false, and that's the assumption we will
// make if an error occurred.
return NS_OK;
}
NS_IMETHOD HandleCompletion(uint16_t aReason) override
{
if (aReason != mozIStorageStatementCallback::REASON_FINISHED) {
return NS_OK;
}
nsresult rv = NotifyVisitedStatus();
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult NotifyVisitedStatus()
{
// If an external handling callback is provided, just notify through it.
if (!!mCallback) {
mCallback->IsVisited(mURI, mIsVisited);
return NS_OK;
}
if (mIsVisited) {
History* history = History::GetService();
NS_ENSURE_STATE(history);
history->NotifyVisited(mURI);
}
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
nsAutoString status;
if (mIsVisited) {
status.AssignLiteral(URI_VISITED);
}
else {
status.AssignLiteral(URI_NOT_VISITED);
}
(void)observerService->NotifyObservers(mURI,
URI_VISITED_RESOLUTION_TOPIC,
status.get());
}
return NS_OK;
}
private:
explicit VisitedQuery(nsIURI* aURI,
const nsMainThreadPtrHandle<mozIVisitedStatusCallback>& aCallback,
bool aIsVisited=false)
: mURI(aURI)
, mCallback(aCallback)
, mIsVisited(aIsVisited)
{
}
~VisitedQuery()
{
}
nsCOMPtr<nsIURI> mURI;
nsMainThreadPtrHandle<mozIVisitedStatusCallback> mCallback;
bool mIsVisited;
};
NS_IMPL_ISUPPORTS_INHERITED(
VisitedQuery
, AsyncStatementCallback
, mozIStorageCompletionCallback
)
/**
* Notifies observers about a visit.
*/
class NotifyVisitObservers : public nsRunnable
{
public:
NotifyVisitObservers(VisitData& aPlace,
VisitData& aReferrer)
: mPlace(aPlace)
, mReferrer(aReferrer)
, mHistory(History::GetService())
{
}
NS_IMETHOD Run()
{
MOZ_ASSERT(NS_IsMainThread(), "This should be called on the main thread");
// We are in the main thread, no need to lock.
if (mHistory->IsShuttingDown()) {
// If we are shutting down, we cannot notify the observers.
return NS_OK;
}
nsNavHistory* navHistory = nsNavHistory::GetHistoryService();
if (!navHistory) {
NS_WARNING("Trying to notify about a visit but cannot get the history service!");
return NS_OK;
}
nsCOMPtr<nsIURI> uri;
(void)NS_NewURI(getter_AddRefs(uri), mPlace.spec);
// Notify the visit. Note that TRANSITION_EMBED visits are never added
// to the database, thus cannot be queried and we don't notify them.
if (mPlace.transitionType != nsINavHistoryService::TRANSITION_EMBED) {
navHistory->NotifyOnVisit(uri, mPlace.visitId, mPlace.visitTime,
mReferrer.visitId, mPlace.transitionType,
mPlace.guid, mPlace.hidden);
}
nsCOMPtr<nsIObserverService> obsService =
mozilla::services::GetObserverService();
if (obsService) {
DebugOnly<nsresult> rv =
obsService->NotifyObservers(uri, URI_VISIT_SAVED, nullptr);
NS_WARN_IF_FALSE(NS_SUCCEEDED(rv), "Could not notify observers");
}
History* history = History::GetService();
NS_ENSURE_STATE(history);
history->AppendToRecentlyVisitedURIs(uri);
history->NotifyVisited(uri);
return NS_OK;
}
private:
VisitData mPlace;
VisitData mReferrer;
nsRefPtr<History> mHistory;
};
/**
* Notifies observers about a pages title changing.
*/
class NotifyTitleObservers : public nsRunnable
{
public:
/**
* Notifies observers on the main thread.
*
* @param aSpec
* The spec of the URI to notify about.
* @param aTitle
* The new title to notify about.
*/
NotifyTitleObservers(const nsCString& aSpec,
const nsString& aTitle,
const nsCString& aGUID)
: mSpec(aSpec)
, mTitle(aTitle)
, mGUID(aGUID)
{
}
NS_IMETHOD Run()
{
MOZ_ASSERT(NS_IsMainThread(), "This should be called on the main thread");
nsNavHistory* navHistory = nsNavHistory::GetHistoryService();
NS_ENSURE_TRUE(navHistory, NS_ERROR_OUT_OF_MEMORY);
nsCOMPtr<nsIURI> uri;
(void)NS_NewURI(getter_AddRefs(uri), mSpec);
navHistory->NotifyTitleChange(uri, mTitle, mGUID);
return NS_OK;
}
private:
const nsCString mSpec;
const nsString mTitle;
const nsCString mGUID;
};
/**
* Helper class for methods which notify their callers through the
* mozIVisitInfoCallback interface.
*/
class NotifyPlaceInfoCallback : public nsRunnable
{
public:
NotifyPlaceInfoCallback(const nsMainThreadPtrHandle<mozIVisitInfoCallback>& aCallback,
const VisitData& aPlace,
bool aIsSingleVisit,
nsresult aResult)
: mCallback(aCallback)
, mPlace(aPlace)
, mResult(aResult)
, mIsSingleVisit(aIsSingleVisit)
{
MOZ_ASSERT(aCallback, "Must pass a non-null callback!");
}
NS_IMETHOD Run()
{
MOZ_ASSERT(NS_IsMainThread(), "This should be called on the main thread");
nsCOMPtr<nsIURI> referrerURI;
if (!mPlace.referrerSpec.IsEmpty()) {
(void)NS_NewURI(getter_AddRefs(referrerURI), mPlace.referrerSpec);
}
nsCOMPtr<nsIURI> uri;
(void)NS_NewURI(getter_AddRefs(uri), mPlace.spec);
nsCOMPtr<mozIPlaceInfo> place;
if (mIsSingleVisit) {
nsCOMPtr<mozIVisitInfo> visit =
new VisitInfo(mPlace.visitId, mPlace.visitTime, mPlace.transitionType,
referrerURI.forget());
PlaceInfo::VisitsArray visits;
(void)visits.AppendElement(visit);
// The frecency isn't exposed because it may not reflect the updated value
// in the case of InsertVisitedURIs.
place =
new PlaceInfo(mPlace.placeId, mPlace.guid, uri.forget(), mPlace.title,
-1, visits);
}
else {
// Same as above.
place =
new PlaceInfo(mPlace.placeId, mPlace.guid, uri.forget(), mPlace.title,
-1);
}
if (NS_SUCCEEDED(mResult)) {
(void)mCallback->HandleResult(place);
}
else {
(void)mCallback->HandleError(mResult, place);
}
return NS_OK;
}
private:
nsMainThreadPtrHandle<mozIVisitInfoCallback> mCallback;
VisitData mPlace;
const nsresult mResult;
bool mIsSingleVisit;
};
/**
* Notifies a callback object when the operation is complete.
*/
class NotifyCompletion : public nsRunnable
{
public:
explicit NotifyCompletion(const nsMainThreadPtrHandle<mozIVisitInfoCallback>& aCallback)
: mCallback(aCallback)
{
MOZ_ASSERT(aCallback, "Must pass a non-null callback!");
}
NS_IMETHOD Run()
{
if (NS_IsMainThread()) {
(void)mCallback->HandleCompletion();
}
else {
(void)NS_DispatchToMainThread(this);
}
return NS_OK;
}
private:
nsMainThreadPtrHandle<mozIVisitInfoCallback> mCallback;
};
/**
* Checks to see if we can add aURI to history, and dispatches an error to
* aCallback (if provided) if we cannot.
*
* @param aURI
* The URI to check.
* @param [optional] aGUID
* The guid of the URI to check. This is passed back to the callback.
* @param [optional] aCallback
* The callback to notify if the URI cannot be added to history.
* @return true if the URI can be added to history, false otherwise.
*/
bool
CanAddURI(nsIURI* aURI,
const nsCString& aGUID = EmptyCString(),
mozIVisitInfoCallback* aCallback = nullptr)
{
MOZ_ASSERT(NS_IsMainThread());
nsNavHistory* navHistory = nsNavHistory::GetHistoryService();
NS_ENSURE_TRUE(navHistory, false);
bool canAdd;
nsresult rv = navHistory->CanAddURI(aURI, &canAdd);
if (NS_SUCCEEDED(rv) && canAdd) {
return true;
};
// We cannot add the URI. Notify the callback, if we were given one.
if (aCallback) {
VisitData place(aURI);
place.guid = aGUID;
nsMainThreadPtrHandle<mozIVisitInfoCallback>
callback(new nsMainThreadPtrHolder<mozIVisitInfoCallback>(aCallback));
nsCOMPtr<nsIRunnable> event =
new NotifyPlaceInfoCallback(callback, place, true, NS_ERROR_INVALID_ARG);
(void)NS_DispatchToMainThread(event);
}
return false;
}
/**
* Adds a visit to the database.
*/
class InsertVisitedURIs final: public nsRunnable
{
public:
/**
* Adds a visit to the database asynchronously.
*
* @param aConnection
* The database connection to use for these operations.
* @param aPlaces
* The locations to record visits.
* @param [optional] aCallback
* The callback to notify about the visit.
*/
static nsresult Start(mozIStorageConnection* aConnection,
nsTArray<VisitData>& aPlaces,
mozIVisitInfoCallback* aCallback = nullptr)
{
MOZ_ASSERT(NS_IsMainThread(), "This should be called on the main thread");
MOZ_ASSERT(aPlaces.Length() > 0, "Must pass a non-empty array!");
// Make sure nsNavHistory service is up before proceeding:
nsNavHistory* navHistory = nsNavHistory::GetHistoryService();
MOZ_ASSERT(navHistory, "Could not get nsNavHistory?!");
if (!navHistory) {
return NS_ERROR_FAILURE;
}
nsMainThreadPtrHandle<mozIVisitInfoCallback>
callback(new nsMainThreadPtrHolder<mozIVisitInfoCallback>(aCallback));
nsRefPtr<InsertVisitedURIs> event =
new InsertVisitedURIs(aConnection, aPlaces, callback);
// Get the target thread, and then start the work!
nsCOMPtr<nsIEventTarget> target = do_GetInterface(aConnection);
NS_ENSURE_TRUE(target, NS_ERROR_UNEXPECTED);
nsresult rv = target->Dispatch(event, NS_DISPATCH_NORMAL);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
NS_IMETHOD Run()
{
MOZ_ASSERT(!NS_IsMainThread(), "This should not be called on the main thread");
// Prevent the main thread from shutting down while this is running.
MutexAutoLock lockedScope(mHistory->GetShutdownMutex());
if (mHistory->IsShuttingDown()) {
// If we were already shutting down, we cannot insert the URIs.
return NS_OK;
}
mozStorageTransaction transaction(mDBConn, false,
mozIStorageConnection::TRANSACTION_IMMEDIATE);
VisitData* lastFetchedPlace = nullptr;
for (nsTArray<VisitData>::size_type i = 0; i < mPlaces.Length(); i++) {
VisitData& place = mPlaces.ElementAt(i);
VisitData& referrer = mReferrers.ElementAt(i);
// Fetching from the database can overwrite this information, so save it
// apart.
bool typed = place.typed;
bool hidden = place.hidden;
// We can avoid a database lookup if it's the same place as the last
// visit we added.
bool known = lastFetchedPlace && lastFetchedPlace->IsSamePlaceAs(place);
if (!known) {
nsresult rv = mHistory->FetchPageInfo(place, &known);
if (NS_FAILED(rv)) {
if (!!mCallback) {
nsCOMPtr<nsIRunnable> event =
new NotifyPlaceInfoCallback(mCallback, place, true, rv);
return NS_DispatchToMainThread(event);
}
return NS_OK;
}
lastFetchedPlace = &mPlaces.ElementAt(i);
}
// If any transition is typed, ensure the page is marked as typed.
if (typed != lastFetchedPlace->typed) {
place.typed = true;
}
// If any transition is visible, ensure the page is marked as visible.
if (hidden != lastFetchedPlace->hidden) {
place.hidden = false;
}
FetchReferrerInfo(referrer, place);
nsresult rv = DoDatabaseInserts(known, place, referrer);
if (!!mCallback) {
nsCOMPtr<nsIRunnable> event =
new NotifyPlaceInfoCallback(mCallback, place, true, rv);
nsresult rv2 = NS_DispatchToMainThread(event);
NS_ENSURE_SUCCESS(rv2, rv2);
}
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIRunnable> event = new NotifyVisitObservers(place, referrer);
rv = NS_DispatchToMainThread(event);
NS_ENSURE_SUCCESS(rv, rv);
// Notify about title change if needed.
if ((!known && !place.title.IsVoid()) || place.titleChanged) {
event = new NotifyTitleObservers(place.spec, place.title, place.guid);
rv = NS_DispatchToMainThread(event);
NS_ENSURE_SUCCESS(rv, rv);
}
}
nsresult rv = transaction.Commit();
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
private:
InsertVisitedURIs(mozIStorageConnection* aConnection,
nsTArray<VisitData>& aPlaces,
const nsMainThreadPtrHandle<mozIVisitInfoCallback>& aCallback)
: mDBConn(aConnection)
, mCallback(aCallback)
, mHistory(History::GetService())
{
MOZ_ASSERT(NS_IsMainThread(), "This should be called on the main thread");
(void)mPlaces.SwapElements(aPlaces);
(void)mReferrers.SetLength(mPlaces.Length());
for (nsTArray<VisitData>::size_type i = 0; i < mPlaces.Length(); i++) {
mReferrers[i].spec = mPlaces[i].referrerSpec;
#ifdef DEBUG
nsCOMPtr<nsIURI> uri;
(void)NS_NewURI(getter_AddRefs(uri), mPlaces[i].spec);
NS_ASSERTION(CanAddURI(uri),
"Passed a VisitData with a URI we cannot add to history!");
#endif
}
}
/**
* Inserts or updates the entry in moz_places for this visit, adds the visit,
* and updates the frecency of the place.
*
* @param aKnown
* True if we already have an entry for this place in moz_places, false
* otherwise.
* @param aPlace
* The place we are adding a visit for.
* @param aReferrer
* The referrer for aPlace.
*/
nsresult DoDatabaseInserts(bool aKnown,
VisitData& aPlace,
VisitData& aReferrer)
{
MOZ_ASSERT(!NS_IsMainThread(), "This should not be called on the main thread");
// If the page was in moz_places, we need to update the entry.
nsresult rv;
if (aKnown) {
rv = mHistory->UpdatePlace(aPlace);
NS_ENSURE_SUCCESS(rv, rv);
}
// Otherwise, the page was not in moz_places, so now we have to add it.
else {
rv = mHistory->InsertPlace(aPlace);
NS_ENSURE_SUCCESS(rv, rv);
// We need the place id and guid of the page we just inserted when we
// have a callback or when the GUID isn't known. No point in doing the
// disk I/O if we do not need it.
if (!!mCallback || aPlace.guid.IsEmpty()) {
bool exists;
rv = mHistory->FetchPageInfo(aPlace, &exists);
NS_ENSURE_SUCCESS(rv, rv);
if (!exists) {
NS_NOTREACHED("should have an entry in moz_places");
}
}
}
rv = AddVisit(aPlace, aReferrer);
NS_ENSURE_SUCCESS(rv, rv);
// TODO (bug 623969) we shouldn't update this after each visit, but
// rather only for each unique place to save disk I/O.
// Don't update frecency if the page should not appear in autocomplete.
if (aPlace.shouldUpdateFrecency) {
rv = UpdateFrecency(aPlace);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
/**
* Loads visit information about the page into _place.
*
* @param _place
* The VisitData for the place we need to know visit information about.
* @param [optional] aThresholdStart
* The timestamp of a new visit (not represented by _place) used to
* determine if the page was recently visited or not.
* @return true if the page was recently (determined with aThresholdStart)
* visited, false otherwise.
*/
bool FetchVisitInfo(VisitData& _place,
PRTime aThresholdStart = 0)
{
NS_PRECONDITION(!_place.spec.IsEmpty(), "must have a non-empty spec!");
nsCOMPtr<mozIStorageStatement> stmt;
// If we have a visitTime, we want information on that specific visit.
if (_place.visitTime) {
stmt = mHistory->GetStatement(
"SELECT id, visit_date "
"FROM moz_historyvisits "
"WHERE place_id = (SELECT id FROM moz_places WHERE url = :page_url) "
"AND visit_date = :visit_date "
);
NS_ENSURE_TRUE(stmt, false);
mozStorageStatementScoper scoper(stmt);
nsresult rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("visit_date"),
_place.visitTime);
NS_ENSURE_SUCCESS(rv, false);
scoper.Abandon();
}
// Otherwise, we want information about the most recent visit.
else {
stmt = mHistory->GetStatement(
"SELECT id, visit_date "
"FROM moz_historyvisits "
"WHERE place_id = (SELECT id FROM moz_places WHERE url = :page_url) "
"ORDER BY visit_date DESC "
);
NS_ENSURE_TRUE(stmt, false);
}
mozStorageStatementScoper scoper(stmt);
nsresult rv = URIBinder::Bind(stmt, NS_LITERAL_CSTRING("page_url"),
_place.spec);
NS_ENSURE_SUCCESS(rv, false);
bool hasResult;
rv = stmt->ExecuteStep(&hasResult);
NS_ENSURE_SUCCESS(rv, false);
if (!hasResult) {
return false;
}
rv = stmt->GetInt64(0, &_place.visitId);
NS_ENSURE_SUCCESS(rv, false);
rv = stmt->GetInt64(1, reinterpret_cast<int64_t*>(&_place.visitTime));
NS_ENSURE_SUCCESS(rv, false);
// If we have been given a visit threshold start time, go ahead and
// calculate if we have been recently visited.
if (aThresholdStart &&
aThresholdStart - _place.visitTime <= RECENT_EVENT_THRESHOLD) {
return true;
}
return false;
}
/**
* Fetches information about a referrer for aPlace if it was a recent
* visit or not.
*
* @param aReferrer
* The VisitData for the referrer. This will be populated with
* FetchVisitInfo.
* @param aPlace
* The VisitData for the visit we will eventually add.
*
*/
void FetchReferrerInfo(VisitData& aReferrer,
VisitData& aPlace)
{
if (aReferrer.spec.IsEmpty()) {
return;
}
if (!FetchVisitInfo(aReferrer, aPlace.visitTime)) {
// We must change both the place and referrer to indicate that we will
// not be using the referrer's data. This behavior has test coverage, so
// if this invariant changes, we'll know.
aPlace.referrerSpec.Truncate();
aReferrer.visitId = 0;
}
}
/**
* Adds a visit for _place and updates it with the right visit id.
*
* @param _place
* The VisitData for the place we need to know visit information about.
* @param aReferrer
* A reference to the referrer's visit data.
*/
nsresult AddVisit(VisitData& _place,
const VisitData& aReferrer)
{
nsresult rv;
nsCOMPtr<mozIStorageStatement> stmt;
if (_place.placeId) {
stmt = mHistory->GetStatement(
"INSERT INTO moz_historyvisits "
"(from_visit, place_id, visit_date, visit_type, session) "
"VALUES (:from_visit, :page_id, :visit_date, :visit_type, 0) "
);
NS_ENSURE_STATE(stmt);
rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("page_id"), _place.placeId);
NS_ENSURE_SUCCESS(rv, rv);
}
else {
stmt = mHistory->GetStatement(
"INSERT INTO moz_historyvisits "
"(from_visit, place_id, visit_date, visit_type, session) "
"VALUES (:from_visit, (SELECT id FROM moz_places WHERE url = :page_url), :visit_date, :visit_type, 0) "
);
NS_ENSURE_STATE(stmt);
rv = URIBinder::Bind(stmt, NS_LITERAL_CSTRING("page_url"), _place.spec);
NS_ENSURE_SUCCESS(rv, rv);
}
rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("from_visit"),
aReferrer.visitId);
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("visit_date"),
_place.visitTime);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t transitionType = _place.transitionType;
NS_ASSERTION(transitionType >= nsINavHistoryService::TRANSITION_LINK &&
transitionType <= nsINavHistoryService::TRANSITION_FRAMED_LINK,
"Invalid transition type!");
rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("visit_type"),
transitionType);
NS_ENSURE_SUCCESS(rv, rv);
mozStorageStatementScoper scoper(stmt);
rv = stmt->Execute();
NS_ENSURE_SUCCESS(rv, rv);
// Now that it should be in the database, we need to obtain the id of the
// visit we just added.
(void)FetchVisitInfo(_place);
return NS_OK;
}
/**
* Updates the frecency, and possibly the hidden-ness of aPlace.
*
* @param aPlace
* The VisitData for the place we want to update.
*/
nsresult UpdateFrecency(const VisitData& aPlace)
{
MOZ_ASSERT(aPlace.shouldUpdateFrecency);
nsresult rv;
{ // First, set our frecency to the proper value.
nsCOMPtr<mozIStorageStatement> stmt;
if (aPlace.placeId) {
stmt = mHistory->GetStatement(
"UPDATE moz_places "
"SET frecency = NOTIFY_FRECENCY("
"CALCULATE_FRECENCY(:page_id), "
"url, guid, hidden, last_visit_date"
") "
"WHERE id = :page_id"
);
NS_ENSURE_STATE(stmt);
rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("page_id"), aPlace.placeId);
NS_ENSURE_SUCCESS(rv, rv);
}
else {
stmt = mHistory->GetStatement(
"UPDATE moz_places "
"SET frecency = NOTIFY_FRECENCY("
"CALCULATE_FRECENCY(id), url, guid, hidden, last_visit_date"
") "
"WHERE url = :page_url"
);
NS_ENSURE_STATE(stmt);
rv = URIBinder::Bind(stmt, NS_LITERAL_CSTRING("page_url"), aPlace.spec);
NS_ENSURE_SUCCESS(rv, rv);
}
mozStorageStatementScoper scoper(stmt);
rv = stmt->Execute();
NS_ENSURE_SUCCESS(rv, rv);
}
if (!aPlace.hidden) {
// Mark the page as not hidden if the frecency is now nonzero.
nsCOMPtr<mozIStorageStatement> stmt;
if (aPlace.placeId) {
stmt = mHistory->GetStatement(
"UPDATE moz_places "
"SET hidden = 0 "
"WHERE id = :page_id AND frecency <> 0"
);
NS_ENSURE_STATE(stmt);
rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("page_id"), aPlace.placeId);
NS_ENSURE_SUCCESS(rv, rv);
}
else {
stmt = mHistory->GetStatement(
"UPDATE moz_places "
"SET hidden = 0 "
"WHERE url = :page_url AND frecency <> 0"
);
NS_ENSURE_STATE(stmt);
rv = URIBinder::Bind(stmt, NS_LITERAL_CSTRING("page_url"), aPlace.spec);
NS_ENSURE_SUCCESS(rv, rv);
}
mozStorageStatementScoper scoper(stmt);
rv = stmt->Execute();
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
mozIStorageConnection* mDBConn;
nsTArray<VisitData> mPlaces;
nsTArray<VisitData> mReferrers;
nsMainThreadPtrHandle<mozIVisitInfoCallback> mCallback;
/**
* Strong reference to the History object because we do not want it to
* disappear out from under us.
*/
nsRefPtr<History> mHistory;
};
class GetPlaceInfo final : public nsRunnable {
public:
/**
* Get the place info for a given place (by GUID or URI) asynchronously.
*/
static nsresult Start(mozIStorageConnection* aConnection,
VisitData& aPlace,
mozIVisitInfoCallback* aCallback) {
MOZ_ASSERT(NS_IsMainThread(), "This should be called on the main thread");
nsMainThreadPtrHandle<mozIVisitInfoCallback>
callback(new nsMainThreadPtrHolder<mozIVisitInfoCallback>(aCallback));
nsRefPtr<GetPlaceInfo> event = new GetPlaceInfo(aPlace, callback);
// Get the target thread, and then start the work!
nsCOMPtr<nsIEventTarget> target = do_GetInterface(aConnection);
NS_ENSURE_TRUE(target, NS_ERROR_UNEXPECTED);
nsresult rv = target->Dispatch(event, NS_DISPATCH_NORMAL);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
NS_IMETHOD Run()
{
MOZ_ASSERT(!NS_IsMainThread(), "This should not be called on the main thread");
bool exists;
nsresult rv = mHistory->FetchPageInfo(mPlace, &exists);
NS_ENSURE_SUCCESS(rv, rv);
if (!exists)
rv = NS_ERROR_NOT_AVAILABLE;
nsCOMPtr<nsIRunnable> event =
new NotifyPlaceInfoCallback(mCallback, mPlace, false, rv);
rv = NS_DispatchToMainThread(event);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
private:
GetPlaceInfo(VisitData& aPlace,
const nsMainThreadPtrHandle<mozIVisitInfoCallback>& aCallback)
: mPlace(aPlace)
, mCallback(aCallback)
, mHistory(History::GetService())
{
MOZ_ASSERT(NS_IsMainThread(), "This should be called on the main thread");
}
VisitData mPlace;
nsMainThreadPtrHandle<mozIVisitInfoCallback> mCallback;
nsRefPtr<History> mHistory;
};
/**
* Sets the page title for a page in moz_places (if necessary).
*/
class SetPageTitle : public nsRunnable
{
public:
/**
* Sets a pages title in the database asynchronously.
*
* @param aConnection
* The database connection to use for this operation.
* @param aURI
* The URI to set the page title on.
* @param aTitle
* The title to set for the page, if the page exists.
*/
static nsresult Start(mozIStorageConnection* aConnection,
nsIURI* aURI,
const nsAString& aTitle)
{
MOZ_ASSERT(NS_IsMainThread(), "This should be called on the main thread");
MOZ_ASSERT(aURI, "Must pass a non-null URI object!");
nsCString spec;
nsresult rv = aURI->GetSpec(spec);
NS_ENSURE_SUCCESS(rv, rv);
nsRefPtr<SetPageTitle> event = new SetPageTitle(spec, aTitle);
// Get the target thread, and then start the work!
nsCOMPtr<nsIEventTarget> target = do_GetInterface(aConnection);
NS_ENSURE_TRUE(target, NS_ERROR_UNEXPECTED);
rv = target->Dispatch(event, NS_DISPATCH_NORMAL);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
NS_IMETHOD Run()
{
MOZ_ASSERT(!NS_IsMainThread(), "This should not be called on the main thread");
// First, see if the page exists in the database (we'll need its id later).
bool exists;
nsresult rv = mHistory->FetchPageInfo(mPlace, &exists);
NS_ENSURE_SUCCESS(rv, rv);
if (!exists || !mPlace.titleChanged) {
// We have no record of this page, or we have no title change, so there
// is no need to do any further work.
return NS_OK;
}
NS_ASSERTION(mPlace.placeId > 0,
"We somehow have an invalid place id here!");
// Now we can update our database record.
nsCOMPtr<mozIStorageStatement> stmt =
mHistory->GetStatement(
"UPDATE moz_places "
"SET title = :page_title "
"WHERE id = :page_id "
);
NS_ENSURE_STATE(stmt);
{
mozStorageStatementScoper scoper(stmt);
rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("page_id"), mPlace.placeId);
NS_ENSURE_SUCCESS(rv, rv);
// Empty strings should clear the title, just like
// nsNavHistory::SetPageTitle.
if (mPlace.title.IsEmpty()) {
rv = stmt->BindNullByName(NS_LITERAL_CSTRING("page_title"));
}
else {
rv = stmt->BindStringByName(NS_LITERAL_CSTRING("page_title"),
StringHead(mPlace.title, TITLE_LENGTH_MAX));
}
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->Execute();
NS_ENSURE_SUCCESS(rv, rv);
}
nsCOMPtr<nsIRunnable> event =
new NotifyTitleObservers(mPlace.spec, mPlace.title, mPlace.guid);
rv = NS_DispatchToMainThread(event);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
private:
SetPageTitle(const nsCString& aSpec,
const nsAString& aTitle)
: mHistory(History::GetService())
{
mPlace.spec = aSpec;
mPlace.title = aTitle;
}
VisitData mPlace;
/**
* Strong reference to the History object because we do not want it to
* disappear out from under us.
*/
nsRefPtr<History> mHistory;
};
/**
* Adds download-specific annotations to a download page.
*/
class SetDownloadAnnotations final : public mozIVisitInfoCallback
{
public:
NS_DECL_ISUPPORTS
explicit SetDownloadAnnotations(nsIURI* aDestination)
: mDestination(aDestination)
, mHistory(History::GetService())
{
MOZ_ASSERT(mDestination);
MOZ_ASSERT(NS_IsMainThread());
}
NS_IMETHOD HandleError(nsresult aResultCode, mozIPlaceInfo *aPlaceInfo) override
{
// Just don't add the annotations in case the visit isn't added.
return NS_OK;
}
NS_IMETHOD HandleResult(mozIPlaceInfo *aPlaceInfo) override
{
// Exit silently if the download destination is not a local file.
nsCOMPtr<nsIFileURL> destinationFileURL = do_QueryInterface(mDestination);
if (!destinationFileURL) {
return NS_OK;
}
nsCOMPtr<nsIURI> source;
nsresult rv = aPlaceInfo->GetUri(getter_AddRefs(source));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIFile> destinationFile;
rv = destinationFileURL->GetFile(getter_AddRefs(destinationFile));
NS_ENSURE_SUCCESS(rv, rv);
nsAutoString destinationFileName;
rv = destinationFile->GetLeafName(destinationFileName);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString destinationURISpec;
rv = destinationFileURL->GetSpec(destinationURISpec);
NS_ENSURE_SUCCESS(rv, rv);
// Use annotations for storing the additional download metadata.
nsAnnotationService* annosvc = nsAnnotationService::GetAnnotationService();
NS_ENSURE_TRUE(annosvc, NS_ERROR_OUT_OF_MEMORY);
rv = annosvc->SetPageAnnotationString(
source,
DESTINATIONFILEURI_ANNO,
NS_ConvertUTF8toUTF16(destinationURISpec),
0,
nsIAnnotationService::EXPIRE_WITH_HISTORY
);
NS_ENSURE_SUCCESS(rv, rv);
rv = annosvc->SetPageAnnotationString(
source,
DESTINATIONFILENAME_ANNO,
destinationFileName,
0,
nsIAnnotationService::EXPIRE_WITH_HISTORY
);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoString title;
rv = aPlaceInfo->GetTitle(title);
NS_ENSURE_SUCCESS(rv, rv);
// In case we are downloading a file that does not correspond to a web
// page for which the title is present, we populate the otherwise empty
// history title with the name of the destination file, to allow it to be
// visible and searchable in history results.
if (title.IsEmpty()) {
rv = mHistory->SetURITitle(source, destinationFileName);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
NS_IMETHOD HandleCompletion() override
{
return NS_OK;
}
private:
~SetDownloadAnnotations() {}
nsCOMPtr<nsIURI> mDestination;
/**
* Strong reference to the History object because we do not want it to
* disappear out from under us.
*/
nsRefPtr<History> mHistory;
};
NS_IMPL_ISUPPORTS(
SetDownloadAnnotations,
mozIVisitInfoCallback
)
/**
* Notify removed visits to observers.
*/
class NotifyRemoveVisits : public nsRunnable
{
public:
explicit NotifyRemoveVisits(nsTHashtable<PlaceHashKey>& aPlaces)
: mPlaces(VISITS_REMOVAL_INITIAL_HASH_LENGTH)
, mHistory(History::GetService())
{
MOZ_ASSERT(!NS_IsMainThread(),
"This should not be called on the main thread");
for (auto iter = aPlaces.Iter(); !iter.Done(); iter.Next()) {
PlaceHashKey* entry = iter.Get();
PlaceHashKey* copy = mPlaces.PutEntry(entry->GetKey());
copy->SetProperties(entry->VisitCount(), entry->IsBookmarked());
entry->mVisits.SwapElements(copy->mVisits);
}
}
NS_IMETHOD Run()
{
MOZ_ASSERT(NS_IsMainThread(), "This should be called on the main thread");
// We are in the main thread, no need to lock.
if (mHistory->IsShuttingDown()) {
// If we are shutting down, we cannot notify the observers.
return NS_OK;
}
nsNavHistory* navHistory = nsNavHistory::GetHistoryService();
if (!navHistory) {
NS_WARNING("Cannot notify without the history service!");
return NS_OK;
}
// Wrap all notifications in a batch, so the view can handle changes in a
// more performant way, by initiating a refresh after a limited number of
// single changes.
(void)navHistory->BeginUpdateBatch();
for (auto iter = mPlaces.Iter(); !iter.Done(); iter.Next()) {
PlaceHashKey* entry = iter.Get();
const nsTArray<VisitData>& visits = entry->mVisits;
nsCOMPtr<nsIURI> uri;
(void)NS_NewURI(getter_AddRefs(uri), visits[0].spec);
bool removingPage = visits.Length() == entry->VisitCount() &&
!entry->IsBookmarked();
// FindRemovableVisits only sets the transition type on the VisitData
// objects it collects if the visits were filtered by transition type.
// RemoveVisitsFilter currently only supports filtering by transition
// type, so FindRemovableVisits will either find all visits, or all
// visits of a given type. Therefore, if transitionType is set on this
// visit, we pass the transition type to NotifyOnPageExpired which in
// turns passes it to OnDeleteVisits to indicate that all visits of a
// given type were removed.
uint32_t transition = visits[0].transitionType < UINT32_MAX
? visits[0].transitionType
: 0;
navHistory->NotifyOnPageExpired(uri, visits[0].visitTime, removingPage,
visits[0].guid,
nsINavHistoryObserver::REASON_DELETED,
transition);
}
(void)navHistory->EndUpdateBatch();
return NS_OK;
}
private:
nsTHashtable<PlaceHashKey> mPlaces;
/**
* Strong reference to the History object because we do not want it to
* disappear out from under us.
*/
nsRefPtr<History> mHistory;
};
/**
* Remove visits from history.
*/
class RemoveVisits : public nsRunnable
{
public:
/**
* Asynchronously removes visits from history.
*
* @param aConnection
* The database connection to use for these operations.
* @param aFilter
* Filter to remove visits.
*/
static nsresult Start(mozIStorageConnection* aConnection,
RemoveVisitsFilter& aFilter)
{
MOZ_ASSERT(NS_IsMainThread(), "This should be called on the main thread");
nsRefPtr<RemoveVisits> event = new RemoveVisits(aConnection, aFilter);
// Get the target thread, and then start the work!
nsCOMPtr<nsIEventTarget> target = do_GetInterface(aConnection);
NS_ENSURE_TRUE(target, NS_ERROR_UNEXPECTED);
nsresult rv = target->Dispatch(event, NS_DISPATCH_NORMAL);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
NS_IMETHOD Run()
{
MOZ_ASSERT(!NS_IsMainThread(),
"This should not be called on the main thread");
// Prevent the main thread from shutting down while this is running.
MutexAutoLock lockedScope(mHistory->GetShutdownMutex());
if (mHistory->IsShuttingDown()) {
// If we were already shutting down, we cannot remove the visits.
return NS_OK;
}
// Find all the visits relative to the current filters and whether their
// pages will be removed or not.
nsTHashtable<PlaceHashKey> places(VISITS_REMOVAL_INITIAL_HASH_LENGTH);
nsresult rv = FindRemovableVisits(places);
NS_ENSURE_SUCCESS(rv, rv);
if (places.Count() == 0)
return NS_OK;
mozStorageTransaction transaction(mDBConn, false,
mozIStorageConnection::TRANSACTION_IMMEDIATE);
rv = RemoveVisitsFromDatabase();
NS_ENSURE_SUCCESS(rv, rv);
rv = RemovePagesFromDatabase(places);
NS_ENSURE_SUCCESS(rv, rv);
rv = transaction.Commit();
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIRunnable> event = new NotifyRemoveVisits(places);
rv = NS_DispatchToMainThread(event);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
private:
RemoveVisits(mozIStorageConnection* aConnection,
RemoveVisitsFilter& aFilter)
: mDBConn(aConnection)
, mHasTransitionType(false)
, mHistory(History::GetService())
{
MOZ_ASSERT(NS_IsMainThread(), "This should be called on the main thread");
// Build query conditions.
nsTArray<nsCString> conditions;
// TODO: add support for binding params when adding further stuff here.
if (aFilter.transitionType < UINT32_MAX) {
conditions.AppendElement(nsPrintfCString("visit_type = %d", aFilter.transitionType));
mHasTransitionType = true;
}
if (conditions.Length() > 0) {
mWhereClause.AppendLiteral (" WHERE ");
for (uint32_t i = 0; i < conditions.Length(); ++i) {
if (i > 0)
mWhereClause.AppendLiteral(" AND ");
mWhereClause.Append(conditions[i]);
}
}
}
/**
* Find the list of entries that may be removed from `moz_places`.
*
* Calling this method makes sense only if we are not clearing the entire history.
*/
nsresult
FindRemovableVisits(nsTHashtable<PlaceHashKey>& aPlaces)
{
MOZ_ASSERT(!NS_IsMainThread(),
"This should not be called on the main thread");
nsCString query("SELECT h.id, url, guid, visit_date, visit_type, "
"(SELECT count(*) FROM moz_historyvisits WHERE place_id = h.id) as full_visit_count, "
"EXISTS(SELECT 1 FROM moz_bookmarks WHERE fk = h.id) as bookmarked "
"FROM moz_historyvisits "
"JOIN moz_places h ON place_id = h.id");
query.Append(mWhereClause);
nsCOMPtr<mozIStorageStatement> stmt = mHistory->GetStatement(query);
NS_ENSURE_STATE(stmt);
mozStorageStatementScoper scoper(stmt);
bool hasResult;
nsresult rv;
while (NS_SUCCEEDED((rv = stmt->ExecuteStep(&hasResult))) && hasResult) {
VisitData visit;
rv = stmt->GetInt64(0, &visit.placeId);
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->GetUTF8String(1, visit.spec);
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->GetUTF8String(2, visit.guid);
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->GetInt64(3, &visit.visitTime);
NS_ENSURE_SUCCESS(rv, rv);
if (mHasTransitionType) {
int32_t transition;
rv = stmt->GetInt32(4, &transition);
NS_ENSURE_SUCCESS(rv, rv);
visit.transitionType = static_cast<uint32_t>(transition);
}
int32_t visitCount, bookmarked;
rv = stmt->GetInt32(5, &visitCount);
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->GetInt32(6, &bookmarked);
NS_ENSURE_SUCCESS(rv, rv);
PlaceHashKey* entry = aPlaces.GetEntry(visit.spec);
if (!entry) {
entry = aPlaces.PutEntry(visit.spec);
}
entry->SetProperties(static_cast<uint32_t>(visitCount), static_cast<bool>(bookmarked));
entry->mVisits.AppendElement(visit);
}
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult
RemoveVisitsFromDatabase()
{
MOZ_ASSERT(!NS_IsMainThread(),
"This should not be called on the main thread");
nsCString query("DELETE FROM moz_historyvisits");
query.Append(mWhereClause);
nsCOMPtr<mozIStorageStatement> stmt = mHistory->GetStatement(query);
NS_ENSURE_STATE(stmt);
mozStorageStatementScoper scoper(stmt);
nsresult rv = stmt->Execute();
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult
RemovePagesFromDatabase(nsTHashtable<PlaceHashKey>& aPlaces)
{
MOZ_ASSERT(!NS_IsMainThread(),
"This should not be called on the main thread");
nsCString placeIdsToRemove;
for (auto iter = aPlaces.Iter(); !iter.Done(); iter.Next()) {
PlaceHashKey* entry = iter.Get();
const nsTArray<VisitData>& visits = entry->mVisits;
// Only orphan ids should be listed.
if (visits.Length() == entry->VisitCount() && !entry->IsBookmarked()) {
if (!placeIdsToRemove.IsEmpty())
placeIdsToRemove.Append(',');
placeIdsToRemove.AppendInt(visits[0].placeId);
}
}
#ifdef DEBUG
{
// Ensure that we are not removing any problematic entry.
nsCString query("SELECT id FROM moz_places h WHERE id IN (");
query.Append(placeIdsToRemove);
query.AppendLiteral(") AND ("
"EXISTS(SELECT 1 FROM moz_bookmarks WHERE fk = h.id) OR "
"EXISTS(SELECT 1 FROM moz_historyvisits WHERE place_id = h.id) OR "
"SUBSTR(h.url, 1, 6) = 'place:' "
")");
nsCOMPtr<mozIStorageStatement> stmt = mHistory->GetStatement(query);
NS_ENSURE_STATE(stmt);
mozStorageStatementScoper scoper(stmt);
bool hasResult;
MOZ_ASSERT(NS_SUCCEEDED(stmt->ExecuteStep(&hasResult)) && !hasResult,
"Trying to remove a non-oprhan place from the database");
}
#endif
nsCString query("DELETE FROM moz_places "
"WHERE id IN (");
query.Append(placeIdsToRemove);
query.Append(')');
nsCOMPtr<mozIStorageStatement> stmt = mHistory->GetStatement(query);
NS_ENSURE_STATE(stmt);
mozStorageStatementScoper scoper(stmt);
nsresult rv = stmt->Execute();
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
mozIStorageConnection* mDBConn;
bool mHasTransitionType;
nsCString mWhereClause;
/**
* Strong reference to the History object because we do not want it to
* disappear out from under us.
*/
nsRefPtr<History> mHistory;
};
/**
* Stores an embed visit, and notifies observers.
*
* @param aPlace
* The VisitData of the visit to store as an embed visit.
* @param [optional] aCallback
* The mozIVisitInfoCallback to notify, if provided.
*/
void
StoreAndNotifyEmbedVisit(VisitData& aPlace,
mozIVisitInfoCallback* aCallback = nullptr)
{
MOZ_ASSERT(aPlace.transitionType == nsINavHistoryService::TRANSITION_EMBED,
"Must only pass TRANSITION_EMBED visits to this!");
MOZ_ASSERT(NS_IsMainThread(), "Must be called on the main thread!");
nsCOMPtr<nsIURI> uri;
(void)NS_NewURI(getter_AddRefs(uri), aPlace.spec);
nsNavHistory* navHistory = nsNavHistory::GetHistoryService();
if (!navHistory || !uri) {
return;
}
navHistory->registerEmbedVisit(uri, aPlace.visitTime);
if (!!aCallback) {
nsMainThreadPtrHandle<mozIVisitInfoCallback>
callback(new nsMainThreadPtrHolder<mozIVisitInfoCallback>(aCallback));
nsCOMPtr<nsIRunnable> event =
new NotifyPlaceInfoCallback(callback, aPlace, true, NS_OK);
(void)NS_DispatchToMainThread(event);
}
VisitData noReferrer;
nsCOMPtr<nsIRunnable> event = new NotifyVisitObservers(aPlace, noReferrer);
(void)NS_DispatchToMainThread(event);
}
} // namespace
////////////////////////////////////////////////////////////////////////////////
//// History
History* History::gService = nullptr;
History::History()
: mShuttingDown(false)
, mShutdownMutex("History::mShutdownMutex")
, mObservers(VISIT_OBSERVERS_INITIAL_CACHE_LENGTH)
, mRecentlyVisitedURIsNextIndex(0)
{
NS_ASSERTION(!gService, "Ruh-roh! This service has already been created!");
gService = this;
nsCOMPtr<nsIObserverService> os = services::GetObserverService();
NS_WARN_IF_FALSE(os, "Observer service was not found!");
if (os) {
(void)os->AddObserver(this, TOPIC_PLACES_SHUTDOWN, false);
}
}
History::~History()
{
UnregisterWeakMemoryReporter(this);
gService = nullptr;
NS_ASSERTION(mObservers.Count() == 0,
"Not all Links were removed before we disappear!");
}
void
History::InitMemoryReporter()
{
RegisterWeakMemoryReporter(this);
}
NS_IMETHODIMP
History::NotifyVisited(nsIURI* aURI)
{
NS_ENSURE_ARG(aURI);
nsAutoScriptBlocker scriptBlocker;
if (XRE_IsParentProcess()) {
nsTArray<ContentParent*> cplist;
ContentParent::GetAll(cplist);
if (!cplist.IsEmpty()) {
URIParams uri;
SerializeURI(aURI, uri);
for (uint32_t i = 0; i < cplist.Length(); ++i) {
unused << cplist[i]->SendNotifyVisited(uri);
}
}
}
// If we have no observers for this URI, we have nothing to notify about.
KeyClass* key = mObservers.GetEntry(aURI);
if (!key) {
return NS_OK;
}
// Update status of each Link node.
{
// RemoveEntry will destroy the array, this iterator should not survive it.
ObserverArray::ForwardIterator iter(key->array);
while (iter.HasMore()) {
Link* link = iter.GetNext();
link->SetLinkState(eLinkState_Visited);
// Verify that the observers hash doesn't mutate while looping through
// the links associated with this URI.
MOZ_ASSERT(key == mObservers.GetEntry(aURI),
"The URIs hash mutated!");
}
}
// All the registered nodes can now be removed for this URI.
mObservers.RemoveEntry(aURI);
return NS_OK;
}
class ConcurrentStatementsHolder final : public mozIStorageCompletionCallback {
public:
NS_DECL_ISUPPORTS
explicit ConcurrentStatementsHolder(mozIStorageConnection* aDBConn)
{
DebugOnly<nsresult> rv = aDBConn->AsyncClone(true, this);
MOZ_ASSERT(NS_SUCCEEDED(rv));
}
NS_IMETHOD Complete(nsresult aStatus, nsISupports* aConnection) override {
if (NS_FAILED(aStatus))
return NS_OK;
mReadOnlyDBConn = do_QueryInterface(aConnection);
// Now we can create our cached statements.
if (!mIsVisitedStatement) {
(void)mReadOnlyDBConn->CreateAsyncStatement(NS_LITERAL_CSTRING(
"SELECT 1 FROM moz_places h "
"WHERE url = ?1 AND last_visit_date NOTNULL "
), getter_AddRefs(mIsVisitedStatement));
MOZ_ASSERT(mIsVisitedStatement);
nsresult result = mIsVisitedStatement ? NS_OK : NS_ERROR_NOT_AVAILABLE;
for (int32_t i = 0; i < mIsVisitedCallbacks.Count(); ++i) {
DebugOnly<nsresult> rv;
rv = mIsVisitedCallbacks[i]->Complete(result, mIsVisitedStatement);
MOZ_ASSERT(NS_SUCCEEDED(rv));
}
mIsVisitedCallbacks.Clear();
}
return NS_OK;
}
void GetIsVisitedStatement(mozIStorageCompletionCallback* aCallback)
{
if (mIsVisitedStatement) {
DebugOnly<nsresult> rv;
rv = aCallback->Complete(NS_OK, mIsVisitedStatement);
MOZ_ASSERT(NS_SUCCEEDED(rv));
} else {
DebugOnly<bool> added = mIsVisitedCallbacks.AppendObject(aCallback);
MOZ_ASSERT(added);
}
}
void Shutdown() {
if (mReadOnlyDBConn) {
mIsVisitedCallbacks.Clear();
DebugOnly<nsresult> rv;
if (mIsVisitedStatement) {
rv = mIsVisitedStatement->Finalize();
MOZ_ASSERT(NS_SUCCEEDED(rv));
}
rv = mReadOnlyDBConn->AsyncClose(nullptr);
MOZ_ASSERT(NS_SUCCEEDED(rv));
}
}
private:
~ConcurrentStatementsHolder()
{
}
nsCOMPtr<mozIStorageAsyncConnection> mReadOnlyDBConn;
nsCOMPtr<mozIStorageAsyncStatement> mIsVisitedStatement;
nsCOMArray<mozIStorageCompletionCallback> mIsVisitedCallbacks;
};
NS_IMPL_ISUPPORTS(
ConcurrentStatementsHolder
, mozIStorageCompletionCallback
)
nsresult
History::GetIsVisitedStatement(mozIStorageCompletionCallback* aCallback)
{
MOZ_ASSERT(NS_IsMainThread());
if (mShuttingDown)
return NS_ERROR_NOT_AVAILABLE;
if (!mConcurrentStatementsHolder) {
mozIStorageConnection* dbConn = GetDBConn();
NS_ENSURE_STATE(dbConn);
mConcurrentStatementsHolder = new ConcurrentStatementsHolder(dbConn);
}
mConcurrentStatementsHolder->GetIsVisitedStatement(aCallback);
return NS_OK;
}
nsresult
History::InsertPlace(const VisitData& aPlace)
{
NS_PRECONDITION(aPlace.placeId == 0, "should not have a valid place id!");
NS_PRECONDITION(!NS_IsMainThread(), "must be called off of the main thread!");
nsCOMPtr<mozIStorageStatement> stmt = GetStatement(
"INSERT INTO moz_places "
"(url, title, rev_host, hidden, typed, frecency, guid) "
"VALUES (:url, :title, :rev_host, :hidden, :typed, :frecency, :guid) "
);
NS_ENSURE_STATE(stmt);
mozStorageStatementScoper scoper(stmt);
nsresult rv = stmt->BindStringByName(NS_LITERAL_CSTRING("rev_host"),
aPlace.revHost);
NS_ENSURE_SUCCESS(rv, rv);
rv = URIBinder::Bind(stmt, NS_LITERAL_CSTRING("url"), aPlace.spec);
NS_ENSURE_SUCCESS(rv, rv);
nsString title = aPlace.title;
// Empty strings should have no title, just like nsNavHistory::SetPageTitle.
if (title.IsEmpty()) {
rv = stmt->BindNullByName(NS_LITERAL_CSTRING("title"));
}
else {
title.Assign(StringHead(aPlace.title, TITLE_LENGTH_MAX));
rv = stmt->BindStringByName(NS_LITERAL_CSTRING("title"), title);
}
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("typed"), aPlace.typed);
NS_ENSURE_SUCCESS(rv, rv);
// When inserting a page for a first visit that should not appear in
// autocomplete, for example an error page, use a zero frecency.
int32_t frecency = aPlace.shouldUpdateFrecency ? aPlace.frecency : 0;
rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("frecency"), frecency);
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("hidden"), aPlace.hidden);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString guid(aPlace.guid);
if (aPlace.guid.IsVoid()) {
rv = GenerateGUID(guid);
NS_ENSURE_SUCCESS(rv, rv);
}
rv = stmt->BindUTF8StringByName(NS_LITERAL_CSTRING("guid"), guid);
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->Execute();
NS_ENSURE_SUCCESS(rv, rv);
// Post an onFrecencyChanged observer notification.
const nsNavHistory* navHistory = nsNavHistory::GetConstHistoryService();
NS_ENSURE_STATE(navHistory);
navHistory->DispatchFrecencyChangedNotification(aPlace.spec, frecency, guid,
aPlace.hidden,
aPlace.visitTime);
return NS_OK;
}
nsresult
History::UpdatePlace(const VisitData& aPlace)
{
NS_PRECONDITION(!NS_IsMainThread(), "must be called off of the main thread!");
NS_PRECONDITION(aPlace.placeId > 0, "must have a valid place id!");
NS_PRECONDITION(!aPlace.guid.IsVoid(), "must have a guid!");
nsCOMPtr<mozIStorageStatement> stmt = GetStatement(
"UPDATE moz_places "
"SET title = :title, "
"hidden = :hidden, "
"typed = :typed, "
"guid = :guid "
"WHERE id = :page_id "
);
NS_ENSURE_STATE(stmt);
mozStorageStatementScoper scoper(stmt);
nsresult rv;
// Empty strings should clear the title, just like nsNavHistory::SetPageTitle.
if (aPlace.title.IsEmpty()) {
rv = stmt->BindNullByName(NS_LITERAL_CSTRING("title"));
}
else {
rv = stmt->BindStringByName(NS_LITERAL_CSTRING("title"),
StringHead(aPlace.title, TITLE_LENGTH_MAX));
}
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("typed"), aPlace.typed);
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->BindInt32ByName(NS_LITERAL_CSTRING("hidden"), aPlace.hidden);
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->BindUTF8StringByName(NS_LITERAL_CSTRING("guid"), aPlace.guid);
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->BindInt64ByName(NS_LITERAL_CSTRING("page_id"),
aPlace.placeId);
NS_ENSURE_SUCCESS(rv, rv);
rv = stmt->Execute();
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult
History::FetchPageInfo(VisitData& _place, bool* _exists)
{
NS_PRECONDITION(!_place.spec.IsEmpty() || !_place.guid.IsEmpty(), "must have either a non-empty spec or guid!");
NS_PRECONDITION(!NS_IsMainThread(), "must be called off of the main thread!");
nsresult rv;
// URI takes precedence.
nsCOMPtr<mozIStorageStatement> stmt;
bool selectByURI = !_place.spec.IsEmpty();
if (selectByURI) {
stmt = GetStatement(
"SELECT guid, id, title, hidden, typed, frecency "
"FROM moz_places "
"WHERE url = :page_url "
);
NS_ENSURE_STATE(stmt);
rv = URIBinder::Bind(stmt, NS_LITERAL_CSTRING("page_url"), _place.spec);
NS_ENSURE_SUCCESS(rv, rv);
}
else {
stmt = GetStatement(
"SELECT url, id, title, hidden, typed, frecency "
"FROM moz_places "
"WHERE guid = :guid "
);
NS_ENSURE_STATE(stmt);
rv = stmt->BindUTF8StringByName(NS_LITERAL_CSTRING("guid"), _place.guid);
NS_ENSURE_SUCCESS(rv, rv);
}
mozStorageStatementScoper scoper(stmt);
rv = stmt->ExecuteStep(_exists);
NS_ENSURE_SUCCESS(rv, rv);
if (!*_exists) {
return NS_OK;
}
if (selectByURI) {
if (_place.guid.IsEmpty()) {
rv = stmt->GetUTF8String(0, _place.guid);
NS_ENSURE_SUCCESS(rv, rv);
}
}
else {
nsAutoCString spec;
rv = stmt->GetUTF8String(0, spec);
NS_ENSURE_SUCCESS(rv, rv);
_place.spec = spec;
}
rv = stmt->GetInt64(1, &_place.placeId);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoString title;
rv = stmt->GetString(2, title);
NS_ENSURE_SUCCESS(rv, rv);
// If the title we were given was void, that means we did not bother to set
// it to anything. As a result, ignore the fact that we may have changed the
// title (because we don't want to, that would be empty), and set the title
// to what is currently stored in the datbase.
if (_place.title.IsVoid()) {
_place.title = title;
}
// Otherwise, just indicate if the title has changed.
else {
_place.titleChanged = !(_place.title.Equals(title) ||
(_place.title.IsEmpty() && title.IsVoid()));
}
int32_t hidden;
rv = stmt->GetInt32(3, &hidden);
NS_ENSURE_SUCCESS(rv, rv);
_place.hidden = !!hidden;
int32_t typed;
rv = stmt->GetInt32(4, &typed);
NS_ENSURE_SUCCESS(rv, rv);
_place.typed = !!typed;
rv = stmt->GetInt32(5, &_place.frecency);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
MOZ_DEFINE_MALLOC_SIZE_OF(HistoryMallocSizeOf)
NS_IMETHODIMP
History::CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize)
{
return MOZ_COLLECT_REPORT(
"explicit/history-links-hashtable", KIND_HEAP, UNITS_BYTES,
SizeOfIncludingThis(HistoryMallocSizeOf),
"Memory used by the hashtable that records changes to the visited state "
"of links.");
}
size_t
History::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOfThis)
{
return aMallocSizeOfThis(this) +
mObservers.SizeOfExcludingThis(aMallocSizeOfThis);
}
/* static */
History*
History::GetService()
{
if (gService) {
return gService;
}
nsCOMPtr<IHistory> service(do_GetService(NS_IHISTORY_CONTRACTID));
MOZ_ASSERT(service, "Cannot obtain IHistory service!");
NS_ASSERTION(gService, "Our constructor was not run?!");
return gService;
}
/* static */
History*
History::GetSingleton()
{
if (!gService) {
gService = new History();
NS_ENSURE_TRUE(gService, nullptr);
gService->InitMemoryReporter();
}
NS_ADDREF(gService);
return gService;
}
mozIStorageConnection*
History::GetDBConn()
{
if (mShuttingDown)
return nullptr;
if (!mDB) {
mDB = Database::GetDatabase();
NS_ENSURE_TRUE(mDB, nullptr);
}
return mDB->MainConn();
}
void
History::Shutdown()
{
MOZ_ASSERT(NS_IsMainThread());
// Prevent other threads from scheduling uses of the DB while we mark
// ourselves as shutting down.
MutexAutoLock lockedScope(mShutdownMutex);
MOZ_ASSERT(!mShuttingDown && "Shutdown was called more than once!");
mShuttingDown = true;
if (mConcurrentStatementsHolder) {
mConcurrentStatementsHolder->Shutdown();
}
}
void
History::AppendToRecentlyVisitedURIs(nsIURI* aURI) {
if (mRecentlyVisitedURIs.Length() < RECENTLY_VISITED_URI_SIZE) {
// Append a new element while the array is not full.
mRecentlyVisitedURIs.AppendElement(aURI);
} else {
// Otherwise, replace the oldest member.
mRecentlyVisitedURIsNextIndex %= RECENTLY_VISITED_URI_SIZE;
mRecentlyVisitedURIs.ElementAt(mRecentlyVisitedURIsNextIndex) = aURI;
mRecentlyVisitedURIsNextIndex++;
}
}
inline bool
History::IsRecentlyVisitedURI(nsIURI* aURI) {
bool equals = false;
RecentlyVisitedArray::index_type i;
for (i = 0; i < mRecentlyVisitedURIs.Length() && !equals; ++i) {
aURI->Equals(mRecentlyVisitedURIs.ElementAt(i), &equals);
}
return equals;
}
////////////////////////////////////////////////////////////////////////////////
//// IHistory
NS_IMETHODIMP
History::VisitURI(nsIURI* aURI,
nsIURI* aLastVisitedURI,
uint32_t aFlags)
{
NS_PRECONDITION(aURI, "URI should not be NULL.");
if (mShuttingDown) {
return NS_OK;
}
if (XRE_IsContentProcess()) {
URIParams uri;
SerializeURI(aURI, uri);
OptionalURIParams lastVisitedURI;
SerializeURI(aLastVisitedURI, lastVisitedURI);
mozilla::dom::ContentChild* cpc =
mozilla::dom::ContentChild::GetSingleton();
NS_ASSERTION(cpc, "Content Protocol is NULL!");
(void)cpc->SendVisitURI(uri, lastVisitedURI, aFlags);
return NS_OK;
}
nsNavHistory* navHistory = nsNavHistory::GetHistoryService();
NS_ENSURE_TRUE(navHistory, NS_ERROR_OUT_OF_MEMORY);
// Silently return if URI is something we shouldn't add to DB.
bool canAdd;
nsresult rv = navHistory->CanAddURI(aURI, &canAdd);
NS_ENSURE_SUCCESS(rv, rv);
if (!canAdd) {
return NS_OK;
}
if (aLastVisitedURI) {
bool same;
rv = aURI->Equals(aLastVisitedURI, &same);
NS_ENSURE_SUCCESS(rv, rv);
if (same && IsRecentlyVisitedURI(aURI)) {
// Do not save refresh visits if we have visited this URI recently.
return NS_OK;
}
}
nsTArray<VisitData> placeArray(1);
NS_ENSURE_TRUE(placeArray.AppendElement(VisitData(aURI, aLastVisitedURI)),
NS_ERROR_OUT_OF_MEMORY);
VisitData& place = placeArray.ElementAt(0);
NS_ENSURE_FALSE(place.spec.IsEmpty(), NS_ERROR_INVALID_ARG);
place.visitTime = PR_Now();
// Assigns a type to the edge in the visit linked list. Each type will be
// considered differently when weighting the frecency of a location.
uint32_t recentFlags = navHistory->GetRecentFlags(aURI);
bool isFollowedLink = recentFlags & nsNavHistory::RECENT_ACTIVATED;
// Embed visits should never be added to the database, and the same is valid
// for redirects across frames.
// For the above reasoning non-toplevel transitions are handled at first.
// if the visit is toplevel or a non-toplevel followed link, then it can be
// handled as usual and stored on disk.
uint32_t transitionType = nsINavHistoryService::TRANSITION_LINK;
if (!(aFlags & IHistory::TOP_LEVEL) && !isFollowedLink) {
// A frame redirected to a new site without user interaction.
transitionType = nsINavHistoryService::TRANSITION_EMBED;
}
else if (aFlags & IHistory::REDIRECT_TEMPORARY) {
transitionType = nsINavHistoryService::TRANSITION_REDIRECT_TEMPORARY;
}
else if (aFlags & IHistory::REDIRECT_PERMANENT) {
transitionType = nsINavHistoryService::TRANSITION_REDIRECT_PERMANENT;
}
else if ((recentFlags & nsNavHistory::RECENT_TYPED) &&
!(aFlags & IHistory::UNRECOVERABLE_ERROR)) {
// Don't mark error pages as typed, even if they were actually typed by
// the user. This is useful to limit their score in autocomplete.
transitionType = nsINavHistoryService::TRANSITION_TYPED;
}
else if (recentFlags & nsNavHistory::RECENT_BOOKMARKED) {
transitionType = nsINavHistoryService::TRANSITION_BOOKMARK;
}
else if (!(aFlags & IHistory::TOP_LEVEL) && isFollowedLink) {
// User activated a link in a frame.
transitionType = nsINavHistoryService::TRANSITION_FRAMED_LINK;
}
place.SetTransitionType(transitionType);
place.hidden = GetHiddenState(aFlags & IHistory::REDIRECT_SOURCE,
transitionType);
// Error pages should never be autocompleted.
if (aFlags & IHistory::UNRECOVERABLE_ERROR) {
place.shouldUpdateFrecency = false;
}
// EMBED visits are session-persistent and should not go through the database.
// They exist only to keep track of isVisited status during the session.
if (place.transitionType == nsINavHistoryService::TRANSITION_EMBED) {
StoreAndNotifyEmbedVisit(place);
}
else {
mozIStorageConnection* dbConn = GetDBConn();
NS_ENSURE_STATE(dbConn);
rv = InsertVisitedURIs::Start(dbConn, placeArray);
NS_ENSURE_SUCCESS(rv, rv);
}
// Finally, notify that we've been visited.
nsCOMPtr<nsIObserverService> obsService =
mozilla::services::GetObserverService();
if (obsService) {
obsService->NotifyObservers(aURI, NS_LINK_VISITED_EVENT_TOPIC, nullptr);
}
return NS_OK;
}
NS_IMETHODIMP
History::RegisterVisitedCallback(nsIURI* aURI,
Link* aLink)
{
NS_ASSERTION(aURI, "Must pass a non-null URI!");
if (XRE_IsContentProcess()) {
NS_PRECONDITION(aLink, "Must pass a non-null Link!");
}
// Obtain our array of observers for this URI.
#ifdef DEBUG
bool keyAlreadyExists = !!mObservers.GetEntry(aURI);
#endif
KeyClass* key = mObservers.PutEntry(aURI);
NS_ENSURE_TRUE(key, NS_ERROR_OUT_OF_MEMORY);
ObserverArray& observers = key->array;
if (observers.IsEmpty()) {
NS_ASSERTION(!keyAlreadyExists,
"An empty key was kept around in our hashtable!");
// We are the first Link node to ask about this URI, or there are no pending
// Links wanting to know about this URI. Therefore, we should query the
// database now.
nsresult rv = VisitedQuery::Start(aURI);
// In IPC builds, we are passed a nullptr Link from
// ContentParent::RecvStartVisitedQuery. Since we won't be adding a
// nullptr entry to our list of observers, and the code after this point
// assumes that aLink is non-nullptr, we will need to return now.
if (NS_FAILED(rv) || !aLink) {
// Remove our array from the hashtable so we don't keep it around.
mObservers.RemoveEntry(aURI);
return rv;
}
}
// In IPC builds, we are passed a nullptr Link from
// ContentParent::RecvStartVisitedQuery. All of our code after this point
// assumes aLink is non-nullptr, so we have to return now.
else if (!aLink) {
NS_ASSERTION(XRE_IsParentProcess(),
"We should only ever get a null Link in the default process!");
return NS_OK;
}
// Sanity check that Links are not registered more than once for a given URI.
// This will not catch a case where it is registered for two different URIs.
NS_ASSERTION(!observers.Contains(aLink),
"Already tracking this Link object!");
// Start tracking our Link.
if (!observers.AppendElement(aLink)) {
// Curses - unregister and return failure.
(void)UnregisterVisitedCallback(aURI, aLink);
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
NS_IMETHODIMP
History::UnregisterVisitedCallback(nsIURI* aURI,
Link* aLink)
{
NS_ASSERTION(aURI, "Must pass a non-null URI!");
NS_ASSERTION(aLink, "Must pass a non-null Link object!");
// Get the array, and remove the item from it.
KeyClass* key = mObservers.GetEntry(aURI);
if (!key) {
NS_ERROR("Trying to unregister for a URI that wasn't registered!");
return NS_ERROR_UNEXPECTED;
}
ObserverArray& observers = key->array;
if (!observers.RemoveElement(aLink)) {
NS_ERROR("Trying to unregister a node that wasn't registered!");
return NS_ERROR_UNEXPECTED;
}
// If the array is now empty, we should remove it from the hashtable.
if (observers.IsEmpty()) {
mObservers.RemoveEntry(aURI);
}
return NS_OK;
}
NS_IMETHODIMP
History::SetURITitle(nsIURI* aURI, const nsAString& aTitle)
{
NS_PRECONDITION(aURI, "Must pass a non-null URI!");
if (mShuttingDown) {
return NS_OK;
}
if (XRE_IsContentProcess()) {
URIParams uri;
SerializeURI(aURI, uri);
mozilla::dom::ContentChild * cpc =
mozilla::dom::ContentChild::GetSingleton();
NS_ASSERTION(cpc, "Content Protocol is NULL!");
(void)cpc->SendSetURITitle(uri, PromiseFlatString(aTitle));
return NS_OK;
}
nsNavHistory* navHistory = nsNavHistory::GetHistoryService();
// At first, it seems like nav history should always be available here, no
// matter what.
//
// nsNavHistory fails to register as a service if there is no profile in
// place (for instance, if user is choosing a profile).
//
// Maybe the correct thing to do is to not register this service if no
// profile has been selected?
//
NS_ENSURE_TRUE(navHistory, NS_ERROR_FAILURE);
bool canAdd;
nsresult rv = navHistory->CanAddURI(aURI, &canAdd);
NS_ENSURE_SUCCESS(rv, rv);
if (!canAdd) {
return NS_OK;
}
// Embed visits don't have a database entry, thus don't set a title on them.
if (navHistory->hasEmbedVisit(aURI)) {
return NS_OK;
}
mozIStorageConnection* dbConn = GetDBConn();
NS_ENSURE_STATE(dbConn);
rv = SetPageTitle::Start(dbConn, aURI, aTitle);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
//// nsIDownloadHistory
NS_IMETHODIMP
History::AddDownload(nsIURI* aSource, nsIURI* aReferrer,
PRTime aStartTime, nsIURI* aDestination)
{
MOZ_ASSERT(NS_IsMainThread());
NS_ENSURE_ARG(aSource);
if (mShuttingDown) {
return NS_OK;
}
if (XRE_IsContentProcess()) {
NS_ERROR("Cannot add downloads to history from content process!");
return NS_ERROR_NOT_AVAILABLE;
}
nsNavHistory* navHistory = nsNavHistory::GetHistoryService();
NS_ENSURE_TRUE(navHistory, NS_ERROR_OUT_OF_MEMORY);
// Silently return if URI is something we shouldn't add to DB.
bool canAdd;
nsresult rv = navHistory->CanAddURI(aSource, &canAdd);
NS_ENSURE_SUCCESS(rv, rv);
if (!canAdd) {
return NS_OK;
}
nsTArray<VisitData> placeArray(1);
NS_ENSURE_TRUE(placeArray.AppendElement(VisitData(aSource, aReferrer)),
NS_ERROR_OUT_OF_MEMORY);
VisitData& place = placeArray.ElementAt(0);
NS_ENSURE_FALSE(place.spec.IsEmpty(), NS_ERROR_INVALID_ARG);
place.visitTime = aStartTime;
place.SetTransitionType(nsINavHistoryService::TRANSITION_DOWNLOAD);
place.hidden = false;
mozIStorageConnection* dbConn = GetDBConn();
NS_ENSURE_STATE(dbConn);
nsMainThreadPtrHandle<mozIVisitInfoCallback> callback;
if (aDestination) {
callback = new nsMainThreadPtrHolder<mozIVisitInfoCallback>(new SetDownloadAnnotations(aDestination));
}
rv = InsertVisitedURIs::Start(dbConn, placeArray, callback);
NS_ENSURE_SUCCESS(rv, rv);
// Finally, notify that we've been visited.
nsCOMPtr<nsIObserverService> obsService =
mozilla::services::GetObserverService();
if (obsService) {
obsService->NotifyObservers(aSource, NS_LINK_VISITED_EVENT_TOPIC, nullptr);
}
return NS_OK;
}
NS_IMETHODIMP
History::RemoveAllDownloads()
{
MOZ_ASSERT(NS_IsMainThread());
if (mShuttingDown) {
return NS_OK;
}
if (XRE_IsContentProcess()) {
NS_ERROR("Cannot remove downloads to history from content process!");
return NS_ERROR_NOT_AVAILABLE;
}
// Ensure navHistory is initialized.
nsNavHistory* navHistory = nsNavHistory::GetHistoryService();
NS_ENSURE_TRUE(navHistory, NS_ERROR_OUT_OF_MEMORY);
mozIStorageConnection* dbConn = GetDBConn();
NS_ENSURE_STATE(dbConn);
RemoveVisitsFilter filter;
filter.transitionType = nsINavHistoryService::TRANSITION_DOWNLOAD;
nsresult rv = RemoveVisits::Start(dbConn, filter);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
//// mozIAsyncHistory
NS_IMETHODIMP
History::GetPlacesInfo(JS::Handle<JS::Value> aPlaceIdentifiers,
mozIVisitInfoCallback* aCallback,
JSContext* aCtx)
{
// Make sure nsNavHistory service is up before proceeding:
nsNavHistory* navHistory = nsNavHistory::GetHistoryService();
MOZ_ASSERT(navHistory, "Could not get nsNavHistory?!");
if (!navHistory) {
return NS_ERROR_FAILURE;
}
uint32_t placesIndentifiersLength;
JS::Rooted<JSObject*> placesIndentifiers(aCtx);
nsresult rv = GetJSArrayFromJSValue(aPlaceIdentifiers, aCtx,
&placesIndentifiers,
&placesIndentifiersLength);
NS_ENSURE_SUCCESS(rv, rv);
nsTArray<VisitData> placesInfo;
placesInfo.SetCapacity(placesIndentifiersLength);
for (uint32_t i = 0; i < placesIndentifiersLength; i++) {
JS::Rooted<JS::Value> placeIdentifier(aCtx);
bool rc = JS_GetElement(aCtx, placesIndentifiers, i, &placeIdentifier);
NS_ENSURE_TRUE(rc, NS_ERROR_UNEXPECTED);
// GUID
nsAutoString fatGUID;
GetJSValueAsString(aCtx, placeIdentifier, fatGUID);
if (!fatGUID.IsVoid()) {
NS_ConvertUTF16toUTF8 guid(fatGUID);
if (!IsValidGUID(guid))
return NS_ERROR_INVALID_ARG;
VisitData& placeInfo = *placesInfo.AppendElement(VisitData());
placeInfo.guid = guid;
}
else {
nsCOMPtr<nsIURI> uri = GetJSValueAsURI(aCtx, placeIdentifier);
if (!uri)
return NS_ERROR_INVALID_ARG; // neither a guid, nor a uri.
placesInfo.AppendElement(VisitData(uri));
}
}
mozIStorageConnection* dbConn = GetDBConn();
NS_ENSURE_STATE(dbConn);
for (nsTArray<VisitData>::size_type i = 0; i < placesInfo.Length(); i++) {
nsresult rv = GetPlaceInfo::Start(dbConn, placesInfo.ElementAt(i), aCallback);
NS_ENSURE_SUCCESS(rv, rv);
}
// Be sure to notify that all of our operations are complete. This
// is dispatched to the background thread first and redirected to the
// main thread from there to make sure that all database notifications
// and all embed or canAddURI notifications have finished.
if (aCallback) {
nsMainThreadPtrHandle<mozIVisitInfoCallback>
callback(new nsMainThreadPtrHolder<mozIVisitInfoCallback>(aCallback));
nsCOMPtr<nsIEventTarget> backgroundThread = do_GetInterface(dbConn);
NS_ENSURE_TRUE(backgroundThread, NS_ERROR_UNEXPECTED);
nsCOMPtr<nsIRunnable> event = new NotifyCompletion(callback);
return backgroundThread->Dispatch(event, NS_DISPATCH_NORMAL);
}
return NS_OK;
}
NS_IMETHODIMP
History::UpdatePlaces(JS::Handle<JS::Value> aPlaceInfos,
mozIVisitInfoCallback* aCallback,
JSContext* aCtx)
{
NS_ENSURE_TRUE(NS_IsMainThread(), NS_ERROR_UNEXPECTED);
NS_ENSURE_TRUE(!aPlaceInfos.isPrimitive(), NS_ERROR_INVALID_ARG);
uint32_t infosLength;
JS::Rooted<JSObject*> infos(aCtx);
nsresult rv = GetJSArrayFromJSValue(aPlaceInfos, aCtx, &infos, &infosLength);
NS_ENSURE_SUCCESS(rv, rv);
nsTArray<VisitData> visitData;
for (uint32_t i = 0; i < infosLength; i++) {
JS::Rooted<JSObject*> info(aCtx);
nsresult rv = GetJSObjectFromArray(aCtx, infos, i, &info);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIURI> uri = GetURIFromJSObject(aCtx, info, "uri");
nsCString guid;
{
nsString fatGUID;
GetStringFromJSObject(aCtx, info, "guid", fatGUID);
if (fatGUID.IsVoid()) {
guid.SetIsVoid(true);
}
else {
guid = NS_ConvertUTF16toUTF8(fatGUID);
}
}
// Make sure that any uri we are given can be added to history, and if not,
// skip it (CanAddURI will notify our callback for us).
if (uri && !CanAddURI(uri, guid, aCallback)) {
continue;
}
// We must have at least one of uri or guid.
NS_ENSURE_ARG(uri || !guid.IsVoid());
// If we were given a guid, make sure it is valid.
bool isValidGUID = IsValidGUID(guid);
NS_ENSURE_ARG(guid.IsVoid() || isValidGUID);
nsString title;
GetStringFromJSObject(aCtx, info, "title", title);
JS::Rooted<JSObject*> visits(aCtx, nullptr);
{
JS::Rooted<JS::Value> visitsVal(aCtx);
bool rc = JS_GetProperty(aCtx, info, "visits", &visitsVal);
NS_ENSURE_TRUE(rc, NS_ERROR_UNEXPECTED);
if (!visitsVal.isPrimitive()) {
visits = visitsVal.toObjectOrNull();
NS_ENSURE_ARG(JS_IsArrayObject(aCtx, visits));
}
}
NS_ENSURE_ARG(visits);
uint32_t visitsLength = 0;
if (visits) {
(void)JS_GetArrayLength(aCtx, visits, &visitsLength);
}
NS_ENSURE_ARG(visitsLength > 0);
// Check each visit, and build our array of VisitData objects.
visitData.SetCapacity(visitData.Length() + visitsLength);
for (uint32_t j = 0; j < visitsLength; j++) {
JS::Rooted<JSObject*> visit(aCtx);
rv = GetJSObjectFromArray(aCtx, visits, j, &visit);
NS_ENSURE_SUCCESS(rv, rv);
VisitData& data = *visitData.AppendElement(VisitData(uri));
data.title = title;
data.guid = guid;
// We must have a date and a transaction type!
rv = GetIntFromJSObject(aCtx, visit, "visitDate", &data.visitTime);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t transitionType = 0;
rv = GetIntFromJSObject(aCtx, visit, "transitionType", &transitionType);
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_ARG_RANGE(transitionType,
nsINavHistoryService::TRANSITION_LINK,
nsINavHistoryService::TRANSITION_FRAMED_LINK);
data.SetTransitionType(transitionType);
data.hidden = GetHiddenState(false, transitionType);
// If the visit is an embed visit, we do not actually add it to the
// database.
if (transitionType == nsINavHistoryService::TRANSITION_EMBED) {
StoreAndNotifyEmbedVisit(data, aCallback);
visitData.RemoveElementAt(visitData.Length() - 1);
continue;
}
// The referrer is optional.
nsCOMPtr<nsIURI> referrer = GetURIFromJSObject(aCtx, visit,
"referrerURI");
if (referrer) {
(void)referrer->GetSpec(data.referrerSpec);
}
}
}
mozIStorageConnection* dbConn = GetDBConn();
NS_ENSURE_STATE(dbConn);
nsMainThreadPtrHandle<mozIVisitInfoCallback>
callback(new nsMainThreadPtrHolder<mozIVisitInfoCallback>(aCallback));
// It is possible that all of the visits we were passed were dissallowed by
// CanAddURI, which isn't an error. If we have no visits to add, however,
// we should not call InsertVisitedURIs::Start.
if (visitData.Length()) {
nsresult rv = InsertVisitedURIs::Start(dbConn, visitData, callback);
NS_ENSURE_SUCCESS(rv, rv);
}
// Be sure to notify that all of our operations are complete. This
// is dispatched to the background thread first and redirected to the
// main thread from there to make sure that all database notifications
// and all embed or canAddURI notifications have finished.
if (aCallback) {
nsCOMPtr<nsIEventTarget> backgroundThread = do_GetInterface(dbConn);
NS_ENSURE_TRUE(backgroundThread, NS_ERROR_UNEXPECTED);
nsCOMPtr<nsIRunnable> event = new NotifyCompletion(callback);
return backgroundThread->Dispatch(event, NS_DISPATCH_NORMAL);
}
return NS_OK;
}
NS_IMETHODIMP
History::IsURIVisited(nsIURI* aURI,
mozIVisitedStatusCallback* aCallback)
{
NS_ENSURE_STATE(NS_IsMainThread());
NS_ENSURE_ARG(aURI);
NS_ENSURE_ARG(aCallback);
nsresult rv = VisitedQuery::Start(aURI, aCallback);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
//// nsIObserver
NS_IMETHODIMP
History::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData)
{
if (strcmp(aTopic, TOPIC_PLACES_SHUTDOWN) == 0) {
Shutdown();
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
if (os) {
(void)os->RemoveObserver(this, TOPIC_PLACES_SHUTDOWN);
}
}
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
//// nsISupports
NS_IMPL_ISUPPORTS(
History
, IHistory
, nsIDownloadHistory
, mozIAsyncHistory
, nsIObserver
, nsIMemoryReporter
)
} // namespace places
} // namespace mozilla
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