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Backing out cfea4859f458, 883e581e0849 due to permaorange on moth opt.

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This commit is contained in:
Justin Lebar 2011-08-02 13:23:11 -04:00
parent d3ddbf1365
commit f12a40a987
23 changed files with 779 additions and 1210 deletions
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56
browser/components/sessionstore/src/nsSessionStore.js
View File

@ -1673,13 +1673,9 @@ SessionStoreService.prototype = {
}
else if (history && history.count > 0) {
try {
// bfCacheEntryMap maps a bfCacheEntry to a unique number. It also
// contains a field 'max' which contains the maximum number in the map.
let bfCacheEntryMap = {'max': 0};
for (var j = 0; j < history.count; j++) {
let entry = this._serializeHistoryEntry(history.getEntryAtIndex(j, false),
aFullData, aTab.pinned,
bfCacheEntryMap);
aFullData, aTab.pinned);
tabData.entries.push(entry);
}
// If we make it through the for loop, then we're ok and we should clear
@ -1768,14 +1764,10 @@ SessionStoreService.prototype = {
* always return privacy sensitive data (use with care)
* @param aIsPinned
* the tab is pinned and should be treated differently for privacy
* @param aBFCacheEntryMap
* a dictionary mapping BFCacheEntries to integers. This dictionary
* must also map 'max' to the largest number in the dictionary.
* @returns object
*/
_serializeHistoryEntry:
function sss_serializeHistoryEntry(aEntry, aFullData,
aIsPinned, aBFCacheEntryMap) {
function sss_serializeHistoryEntry(aEntry, aFullData, aIsPinned) {
var entry = { url: aEntry.URI.spec };
try {
@ -1866,14 +1858,8 @@ SessionStoreService.prototype = {
catch (ex) { debug(ex); }
}
if (aBFCacheEntryMap[aEntry.BFCacheEntry]) {
entry.docIdentifier = aBFCacheEntryMap[aEntry.BFCacheEntry];
}
else {
let id = aBFCacheEntryMap['max'] + 1;
entry.docIdentifier = id;
aBFCacheEntryMap['max'] = id;
aBFCacheEntryMap[aEntry.BFCacheEntry] = id;
if (aEntry.docIdentifier) {
entry.docIdentifier = aEntry.docIdentifier;
}
if (aEntry.stateData != null) {
@ -1891,7 +1877,7 @@ SessionStoreService.prototype = {
var child = aEntry.GetChildAt(i);
if (child) {
entry.children.push(this._serializeHistoryEntry(child, aFullData,
aIsPinned, aBFCacheEntryMap));
aIsPinned));
}
else { // to maintain the correct frame order, insert a dummy entry
entry.children.push({ url: "about:blank" });
@ -2974,6 +2960,7 @@ SessionStoreService.prototype = {
browser.__SS_restore_data = tabData.entries[activeIndex] || {};
browser.__SS_restore_pageStyle = tabData.pageStyle || "";
browser.__SS_restore_tab = aTab;
browser.__SS_restore_docIdentifier = curSHEntry.docIdentifier;
didStartLoad = true;
try {
@ -3126,16 +3113,24 @@ SessionStoreService.prototype = {
}
if (aEntry.docIdentifier) {
// If we have a serialized document identifier, try to find an SHEntry
// which matches that doc identifier and adopt that SHEntry's
// BFCacheEntry. If we don't find a match, insert shEntry as the match
// for the document identifier.
let matchingEntry = aDocIdentMap[aEntry.docIdentifier];
if (!matchingEntry) {
aDocIdentMap[aEntry.docIdentifier] = shEntry;
// Get a new document identifier for this entry to ensure that history
// entries after a session restore are considered to have different
// documents from the history entries before the session restore.
// Document identifiers are 64-bit ints, so JS will loose precision and
// start assigning all entries the same doc identifier if these ever get
// large enough.
//
// It's a potential security issue if document identifiers aren't
// globally unique, but shEntry.setUniqueDocIdentifier() below guarantees
// that we won't re-use a doc identifier within a given instance of the
// application.
let ident = aDocIdentMap[aEntry.docIdentifier];
if (!ident) {
shEntry.setUniqueDocIdentifier();
aDocIdentMap[aEntry.docIdentifier] = shEntry.docIdentifier;
}
else {
shEntry.adoptBFCacheEntry(matchingEntry);
shEntry.docIdentifier = ident;
}
}
@ -3271,12 +3266,19 @@ SessionStoreService.prototype = {
aBrowser.markupDocumentViewer.authorStyleDisabled = selectedPageStyle == "_nostyle";
}
if (aBrowser.__SS_restore_docIdentifier) {
let sh = aBrowser.webNavigation.sessionHistory;
sh.getEntryAtIndex(sh.index, false).QueryInterface(Ci.nsISHEntry).
docIdentifier = aBrowser.__SS_restore_docIdentifier;
}
// notify the tabbrowser that this document has been completely restored
this._sendTabRestoredNotification(aBrowser.__SS_restore_tab);
delete aBrowser.__SS_restore_data;
delete aBrowser.__SS_restore_pageStyle;
delete aBrowser.__SS_restore_tab;
delete aBrowser.__SS_restore_docIdentifier;
},
/**

8
browser/components/sessionstore/test/browser/browser_500328.js
View File

@ -116,13 +116,13 @@ function test() {
// After these push/replaceState calls, the window should have three
// history entries:
// testURL (state object: null) <-- oldest
// testURL (state object: {obj1:1})
// testURL?page2 (state object: {obj3:/^a$/}) <-- newest
// testURL (state object: null) <-- oldest
// testURL (state object: {obj1:1})
// page2 (state object: {obj3:/^a$/}) <-- newest
let contentWindow = tab.linkedBrowser.contentWindow;
let history = contentWindow.history;
history.pushState({obj1:1}, "title-obj1");
history.pushState({obj2:2}, "title-obj2", "?page2");
history.pushState({obj2:2}, "title-obj2", "page2");
history.replaceState({obj3:/^a$/}, "title-obj3");
let state = ss.getTabState(tab);

23
content/base/public/nsIDocument.h
View File

@ -69,7 +69,6 @@
#include "nsIAnimationFrameListener.h"
#include "nsEventStates.h"
#include "nsIStructuredCloneContainer.h"
#include "nsIBFCacheEntry.h"
#include "nsDOMMemoryReporter.h"
class nsIContent;
@ -126,9 +125,9 @@ class Element;
} // namespace mozilla
#define NS_IDOCUMENT_IID \
{ 0x455e4d79, 0x756b, 0x4f73, \
{ 0x95, 0xea, 0x3f, 0xf6, 0x0c, 0x6a, 0x8c, 0xa6 } }
#define NS_IDOCUMENT_IID \
{ 0xfac563fb, 0x2b6a, 0x4ac8, \
{ 0x85, 0xf7, 0xd5, 0x14, 0x4b, 0x3e, 0xce, 0x78 } }
// Flag for AddStyleSheet().
#define NS_STYLESHEET_FROM_CATALOG (1 << 0)
@ -481,15 +480,11 @@ public:
return GetBFCacheEntry() ? nsnull : mPresShell;
}
void SetBFCacheEntry(nsIBFCacheEntry* aEntry)
{
mBFCacheEntry = aEntry;
void SetBFCacheEntry(nsISHEntry* aSHEntry) {
mSHEntry = aSHEntry;
}
nsIBFCacheEntry* GetBFCacheEntry() const
{
return mBFCacheEntry;
}
nsISHEntry* GetBFCacheEntry() const { return mSHEntry; }
/**
* Return the parent document of this document. Will return null
@ -1743,9 +1738,9 @@ protected:
AnimationListenerList mAnimationFrameListeners;
// This object allows us to evict ourself from the back/forward cache. The
// pointer is non-null iff we're currently in the bfcache.
nsIBFCacheEntry *mBFCacheEntry;
// The session history entry in which we're currently bf-cached. Non-null
// if and only if we're currently in the bfcache.
nsISHEntry* mSHEntry;
// Our base target.
nsString mBaseTarget;

66
docshell/base/nsDocShell.cpp
View File

@ -4136,10 +4136,10 @@ nsDocShell::LoadErrorPage(nsIURI *aURI, const PRUnichar *aURL,
mFailedLoadType = mLoadType;
if (mLSHE) {
// Abandon mLSHE's BFCache entry and create a new one. This way, if
// we go back or forward to another SHEntry with the same doc
// identifier, the error page won't persist.
mLSHE->AbandonBFCacheEntry();
// If we don't give mLSHE a new doc identifier here, when we go back or
// forward to another SHEntry with the same doc identifier, the error
// page will persist.
mLSHE->SetUniqueDocIdentifier();
}
nsCAutoString url;
@ -4412,10 +4412,10 @@ nsDocShell::LoadPage(nsISupports *aPageDescriptor, PRUint32 aDisplayType)
nsresult rv = shEntryIn->Clone(getter_AddRefs(shEntry));
NS_ENSURE_SUCCESS(rv, rv);
// Give our cloned shEntry a new bfcache entry so this load is independent
// of all other loads. (This is important, in particular, for bugs 582795
// and 585298.)
rv = shEntry->AbandonBFCacheEntry();
// Give our cloned shEntry a new document identifier so this load is
// independent of all other loads. (This is important, in particular,
// for bugs 582795 and 585298.)
rv = shEntry->SetUniqueDocIdentifier();
NS_ENSURE_SUCCESS(rv, rv);
//
@ -8403,15 +8403,17 @@ nsDocShell::InternalLoad(nsIURI * aURI,
NS_SUCCEEDED(splitRv2) &&
curBeforeHash.Equals(newBeforeHash);
// XXX rename
PRBool sameDocument = PR_FALSE;
PRBool sameDocIdent = PR_FALSE;
if (mOSHE && aSHEntry) {
// We're doing a history load.
mOSHE->SharesDocumentWith(aSHEntry, &sameDocument);
PRUint64 ourDocIdent, otherDocIdent;
mOSHE->GetDocIdentifier(&ourDocIdent);
aSHEntry->GetDocIdentifier(&otherDocIdent);
sameDocIdent = (ourDocIdent == otherDocIdent);
#ifdef DEBUG
if (sameDocument) {
if (sameDocIdent) {
nsCOMPtr<nsIInputStream> currentPostData;
mOSHE->GetPostData(getter_AddRefs(currentPostData));
NS_ASSERTION(currentPostData == aPostData,
@ -8434,7 +8436,7 @@ nsDocShell::InternalLoad(nsIURI * aURI,
// The restriction tha the SHEntries in (a) must be different ensures
// that history.go(0) and the like trigger full refreshes, rather than
// short-circuited loads.
PRBool doShortCircuitedLoad = (sameDocument && mOSHE != aSHEntry) ||
PRBool doShortCircuitedLoad = (sameDocIdent && mOSHE != aSHEntry) ||
(!aSHEntry && aPostData == nsnull &&
sameExceptHashes && !newHash.IsEmpty());
@ -8485,6 +8487,7 @@ nsDocShell::InternalLoad(nsIURI * aURI,
OnNewURI(aURI, nsnull, owner, mLoadType, PR_TRUE, PR_TRUE, PR_TRUE);
nsCOMPtr<nsIInputStream> postData;
PRUint64 docIdent = PRUint64(-1);
nsCOMPtr<nsISupports> cacheKey;
if (mOSHE) {
@ -8498,12 +8501,8 @@ nsDocShell::InternalLoad(nsIURI * aURI,
// wouldn't want here.
if (aLoadType & LOAD_CMD_NORMAL) {
mOSHE->GetPostData(getter_AddRefs(postData));
mOSHE->GetDocIdentifier(&docIdent);
mOSHE->GetCacheKey(getter_AddRefs(cacheKey));
// Link our new SHEntry to the old SHEntry's back/forward
// cache data, since the two SHEntries correspond to the
// same document.
mLSHE->AdoptBFCacheEntry(mOSHE);
}
}
@ -8523,6 +8522,11 @@ nsDocShell::InternalLoad(nsIURI * aURI,
// cache first
if (cacheKey)
mOSHE->SetCacheKey(cacheKey);
// Propagate our document identifier to the new mOSHE so that
// we'll know it's related by an anchor navigation or pushState.
if (docIdent != PRUint64(-1))
mOSHE->SetDocIdentifier(docIdent);
}
/* restore previous position of scroller(s), if we're moving
@ -8566,7 +8570,7 @@ nsDocShell::InternalLoad(nsIURI * aURI,
}
}
if (sameDocument) {
if (sameDocIdent) {
// Set the doc's URI according to the new history entry's URI
nsCOMPtr<nsIURI> newURI;
mOSHE->GetURI(getter_AddRefs(newURI));
@ -8583,10 +8587,10 @@ nsDocShell::InternalLoad(nsIURI * aURI,
// Dispatch the popstate and hashchange events, as appropriate.
nsCOMPtr<nsPIDOMWindow> window = do_QueryInterface(mScriptGlobal);
if (window) {
// Need the doHashchange check here since sameDocument is
// Need the doHashchange check here since sameDocIdent is
// false if we're navigating to a new shentry (i.e. a aSHEntry
// is null), such as when clicking a <a href="#foo">.
if (sameDocument || doHashchange) {
if (sameDocIdent || doHashchange) {
window->DispatchSyncPopState();
}
@ -9416,11 +9420,11 @@ nsDocShell::OnNewURI(nsIURI * aURI, nsIChannel * aChannel, nsISupports* aOwner,
}
// If the response status indicates an error, unlink this session
// history entry from any entries sharing its document.
// history entry from any entries sharing its doc ident.
PRUint32 responseStatus;
nsresult rv = httpChannel->GetResponseStatus(&responseStatus);
if (mLSHE && NS_SUCCEEDED(rv) && responseStatus >= 400) {
mLSHE->AbandonBFCacheEntry();
mLSHE->SetUniqueDocIdentifier();
}
}
}
@ -9649,9 +9653,9 @@ nsDocShell::AddState(nsIVariant *aData, const nsAString& aTitle,
// It's important that this function not run arbitrary scripts after step 1
// and before completing step 5. For example, if a script called
// history.back() before we completed step 5, bfcache might destroy an
// active content viewer. Since EvictOutOfRangeContentViewers at the end of
// step 5 might run script, we can't just put a script blocker around the
// critical section.
// active content viewer. Since EvictContentViewers at the end of step 5
// might run script, we can't just put a script blocker around the critical
// section.
//
// Note that we completely ignore the aTitle parameter.
@ -9831,9 +9835,11 @@ nsDocShell::AddState(nsIVariant *aData, const nsAString& aTitle,
NS_ENSURE_TRUE(newSHEntry, NS_ERROR_FAILURE);
// Link the new SHEntry to the old SHEntry's BFCache entry, since the
// two entries correspond to the same document.
NS_ENSURE_SUCCESS(newSHEntry->AdoptBFCacheEntry(oldOSHE),
// Set the new SHEntry's document identifier, if we can.
PRUint64 ourDocIdent;
NS_ENSURE_SUCCESS(oldOSHE->GetDocIdentifier(&ourDocIdent),
NS_ERROR_FAILURE);
NS_ENSURE_SUCCESS(newSHEntry->SetDocIdentifier(ourDocIdent),
NS_ERROR_FAILURE);
// Set the new SHEntry's title (bug 655273).
@ -9879,7 +9885,7 @@ nsDocShell::AddState(nsIVariant *aData, const nsAString& aTitle,
PRInt32 curIndex = -1;
rv = rootSH->GetIndex(&curIndex);
if (NS_SUCCEEDED(rv) && curIndex > -1) {
internalSH->EvictOutOfRangeContentViewers(curIndex);
internalSH->EvictContentViewers(curIndex - 1, curIndex);
}
}

7
docshell/build/nsDocShellModule.cpp
View File

@ -66,7 +66,6 @@
// session history
#include "nsSHEntry.h"
#include "nsSHEntryShared.h"
#include "nsSHistory.h"
#include "nsSHTransaction.h"
@ -88,15 +87,15 @@ Initialize()
nsresult rv = nsSHistory::Startup();
NS_ENSURE_SUCCESS(rv, rv);
nsSHEntryShared::Startup();
return NS_OK;
rv = nsSHEntry::Startup();
return rv;
}
static void
Shutdown()
{
nsSHistory::Shutdown();
nsSHEntryShared::Shutdown();
nsSHEntry::Shutdown();
gInitialized = PR_FALSE;
}

1
docshell/shistory/public/Makefile.in
View File

@ -56,7 +56,6 @@ XPIDLSRCS = \
nsISHContainer.idl \
nsISHTransaction.idl \
nsISHistoryInternal.idl \
nsIBFCacheEntry.idl \
$(NULL)
include $(topsrcdir)/config/rules.mk

45
docshell/shistory/public/nsIBFCacheEntry.idl
View File

@ -1,45 +0,0 @@
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is the Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsISupports.idl"
/**
* This interface lets you evict a document from the back/forward cache.
*/
[scriptable, uuid(27A326F6-5D66-463D-8CDC-49394A8CB7D6)]
interface nsIBFCacheEntry : nsISupports
{
void RemoveFromBFCacheSync();
void RemoveFromBFCacheAsync();
};

63
docshell/shistory/public/nsISHEntry.idl
View File

@ -51,18 +51,15 @@ interface nsIInputStream;
interface nsIDocShellTreeItem;
interface nsISupportsArray;
interface nsIStructuredCloneContainer;
interface nsIBFCacheEntry;
%{C++
struct nsIntRect;
class nsDocShellEditorData;
class nsSHEntryShared;
%}
[ref] native nsIntRect(nsIntRect);
[ptr] native nsDocShellEditorDataPtr(nsDocShellEditorData);
[ptr] native nsSHEntryShared(nsSHEntryShared);
[scriptable, uuid(6443FD72-A50F-4B8B-BB82-BB1FA04CB15D)]
[scriptable, uuid(b92d403e-f5ec-4b81-b0e3-6e6c241cef2d)]
interface nsISHEntry : nsIHistoryEntry
{
/** URI for the document */
@ -143,6 +140,21 @@ interface nsISHEntry : nsIHistoryEntry
*/
attribute unsigned long ID;
/**
* docIdentifier is an integer that should be the same for two entries
* attached to the same docshell if and only if the two entries are entries
* for the same document. In practice, two entries A and B will have the
* same docIdentifier if we arrived at B by clicking an anchor link in A or
* if B was created by A's calling history.pushState().
*/
attribute unsigned long long docIdentifier;
/**
* Changes this entry's doc identifier to a new value which is unique
* among those of all other entries.
*/
void setUniqueDocIdentifier();
/** attribute to set and get the cache key for the entry */
attribute nsISupports cacheKey;
@ -240,36 +252,6 @@ interface nsISHEntry : nsIHistoryEntry
* The history ID of the docshell.
*/
attribute unsigned long long docshellID;
readonly attribute nsIBFCacheEntry BFCacheEntry;
/**
* Does this SHEntry point to the given BFCache entry? If so, evicting
* the BFCache entry will evict the SHEntry, since the two entries
* correspond to the same document.
*/
[notxpcom, noscript]
boolean hasBFCacheEntry(in nsIBFCacheEntry aEntry);
/**
* Adopt aEntry's BFCacheEntry, so now both this and aEntry point to
* aEntry's BFCacheEntry.
*/
void adoptBFCacheEntry(in nsISHEntry aEntry);
/**
* Create a new BFCache entry and drop our reference to our old one. This
* call unlinks this SHEntry from any other SHEntries for its document.
*/
void abandonBFCacheEntry();
/**
* Does this SHEntry correspond to the same document as aEntry? This is
* true iff the two SHEntries have the same BFCacheEntry. So in
* particular, sharesDocumentWith(aEntry) is guaranteed to return true if
* it's preceeded by a call to adoptBFCacheEntry(aEntry).
*/
boolean sharesDocumentWith(in nsISHEntry aEntry);
};
[scriptable, uuid(bb66ac35-253b-471f-a317-3ece940f04c5)]
@ -282,17 +264,6 @@ interface nsISHEntryInternal : nsISupports
* A number that is assigned by the sHistory when the entry is activated
*/
attribute unsigned long lastTouched;
/**
* Some state, particularly that related to the back/forward cache, is
* shared between SHEntries which correspond to the same document. This
* method gets a pointer to that shared state.
*
* This shared state is the SHEntry's BFCacheEntry. So
* hasBFCacheEntry(getSharedState()) is guaranteed to return true.
*/
[noscript, notxpcom]
nsSHEntryShared getSharedState();
};
%{ C++

27
docshell/shistory/public/nsISHistoryInternal.idl
View File

@ -57,7 +57,7 @@ struct nsTArrayDefaultAllocator;
[ref] native nsDocshellIDArray(nsTArray<PRUint64, nsTArrayDefaultAllocator>);
[scriptable, uuid(e27cf38e-c19f-4294-bd31-d7e0916e7fa2)]
[scriptable, uuid(2dede933-25e1-47a3-8f61-0127c785ea01)]
interface nsISHistoryInternal: nsISupports
{
/**
@ -96,25 +96,20 @@ interface nsISHistoryInternal: nsISupports
*/
readonly attribute nsISHistoryListener listener;
/**
* Evict content viewers which don't lie in the "safe" range around aIndex.
* In practice, this should leave us with no more than gHistoryMaxViewers
* viewers associated with this SHistory object.
*
* Also make sure that the total number of content viewers in all windows is
* not greater than our global max; if it is, evict viewers as appropriate.
*
* @param aIndex - The index around which the "safe" range is centered. In
* general, if you just navigated the history, aIndex should be the index
* history was navigated to.
*/
void evictOutOfRangeContentViewers(in long aIndex);
/**
* Evict content viewers until the number of content viewers per tab
* is no more than gHistoryMaxViewers. Also, count
* total number of content viewers globally and evict one if we are over
* our total max. This is always called in Show(), after we destroy
* the previous viewer.
*/
void evictContentViewers(in long previousIndex, in long index);
/**
* Evict the content viewer associated with a bfcache entry
* Evict the content viewer associated with a session history entry
* that has timed out.
*/
void evictExpiredContentViewerForEntry(in nsIBFCacheEntry aEntry);
void evictExpiredContentViewerForEntry(in nsISHEntry aEntry);
/**
* Evict all the content viewers in this session history

3
docshell/shistory/src/Makefile.in
View File

@ -48,13 +48,10 @@ LIBRARY_NAME = shistory_s
FORCE_STATIC_LIB = 1
LIBXUL_LIBRARY = 1
EXPORTS = nsSHEntryShared.h \
$(NULL)
CPPSRCS = nsSHEntry.cpp \
nsSHTransaction.cpp \
nsSHistory.cpp \
nsSHEntryShared.cpp \
$(NULL)
include $(topsrcdir)/config/rules.mk

497
docshell/shistory/src/nsSHEntry.cpp
View File

@ -36,6 +36,10 @@
*
* ***** END LICENSE BLOCK ***** */
#ifdef DEBUG_bryner
#define DEBUG_PAGE_CACHE
#endif
// Local Includes
#include "nsSHEntry.h"
#include "nsXPIDLString.h"
@ -44,44 +48,103 @@
#include "nsIDocShellTreeItem.h"
#include "nsIDocument.h"
#include "nsIDOMDocument.h"
#include "nsAutoPtr.h"
#include "nsThreadUtils.h"
#include "nsIWebNavigation.h"
#include "nsISHistory.h"
#include "nsISHistoryInternal.h"
#include "nsDocShellEditorData.h"
#include "nsSHEntryShared.h"
#include "nsILayoutHistoryState.h"
#include "nsIContentViewer.h"
#include "nsISupportsArray.h"
#include "nsIDocShell.h"
namespace dom = mozilla::dom;
// Hardcode this to time out unused content viewers after 30 minutes
#define CONTENT_VIEWER_TIMEOUT_SECONDS 30*60
typedef nsExpirationTracker<nsSHEntry,3> HistoryTrackerBase;
class HistoryTracker : public HistoryTrackerBase {
public:
// Expire cached contentviewers after 20-30 minutes in the cache.
HistoryTracker() : HistoryTrackerBase((CONTENT_VIEWER_TIMEOUT_SECONDS/2)*1000) {}
protected:
virtual void NotifyExpired(nsSHEntry* aObj) {
RemoveObject(aObj);
aObj->Expire();
}
};
static HistoryTracker *gHistoryTracker = nsnull;
static PRUint32 gEntryID = 0;
static PRUint64 gEntryDocIdentifier = 0;
nsresult nsSHEntry::Startup()
{
gHistoryTracker = new HistoryTracker();
return gHistoryTracker ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
}
void nsSHEntry::Shutdown()
{
delete gHistoryTracker;
gHistoryTracker = nsnull;
}
static void StopTrackingEntry(nsSHEntry *aEntry)
{
if (aEntry->GetExpirationState()->IsTracked()) {
gHistoryTracker->RemoveObject(aEntry);
}
}
//*****************************************************************************
//*** nsSHEntry: Object Management
//*****************************************************************************
nsSHEntry::nsSHEntry()
nsSHEntry::nsSHEntry()
: mLoadType(0)
, mID(gEntryID++)
, mDocIdentifier(gEntryDocIdentifier++)
, mScrollPositionX(0)
, mScrollPositionY(0)
, mURIWasModified(PR_FALSE)
, mIsFrameNavigation(PR_FALSE)
, mSaveLayoutState(PR_TRUE)
, mExpired(PR_FALSE)
, mSticky(PR_TRUE)
, mDynamicallyCreated(PR_FALSE)
, mParent(nsnull)
, mViewerBounds(0, 0, 0, 0)
, mDocShellID(0)
, mLastTouched(0)
{
mShared = new nsSHEntryShared();
}
nsSHEntry::nsSHEntry(const nsSHEntry &other)
: mShared(other.mShared)
, mURI(other.mURI)
: mURI(other.mURI)
, mReferrerURI(other.mReferrerURI)
// XXX why not copy mDocument?
, mTitle(other.mTitle)
, mPostData(other.mPostData)
, mLayoutHistoryState(other.mLayoutHistoryState)
, mLoadType(0) // XXX why not copy?
, mID(other.mID)
, mDocIdentifier(other.mDocIdentifier)
, mScrollPositionX(0) // XXX why not copy?
, mScrollPositionY(0) // XXX why not copy?
, mURIWasModified(other.mURIWasModified)
, mIsFrameNavigation(other.mIsFrameNavigation)
, mSaveLayoutState(other.mSaveLayoutState)
, mExpired(other.mExpired)
, mSticky(PR_TRUE)
, mDynamicallyCreated(other.mDynamicallyCreated)
// XXX why not copy mContentType?
, mCacheKey(other.mCacheKey)
, mParent(other.mParent)
, mViewerBounds(0, 0, 0, 0)
, mOwner(other.mOwner)
, mDocShellID(other.mDocShellID)
, mStateData(other.mStateData)
{
}
@ -97,16 +160,37 @@ ClearParentPtr(nsISHEntry* aEntry, void* /* aData */)
nsSHEntry::~nsSHEntry()
{
// Null out the mParent pointers on all our kids.
StopTrackingEntry(this);
// Since we never really remove kids from SHEntrys, we need to null
// out the mParent pointers on all our kids.
mChildren.EnumerateForwards(ClearParentPtr, nsnull);
mChildren.Clear();
if (mContentViewer) {
// RemoveFromBFCacheSync is virtual, so call the nsSHEntry version
// explicitly
nsSHEntry::RemoveFromBFCacheSync();
}
mEditorData = nsnull;
#ifdef DEBUG
// This is not happening as far as I can tell from breakpad as of early November 2007
nsExpirationTracker<nsSHEntry,3>::Iterator iterator(gHistoryTracker);
nsSHEntry* elem;
while ((elem = iterator.Next()) != nsnull) {
NS_ASSERTION(elem != this, "Found dead entry still in the tracker!");
}
#endif
}
//*****************************************************************************
// nsSHEntry: nsISupports
//*****************************************************************************
NS_IMPL_ISUPPORTS4(nsSHEntry, nsISHContainer, nsISHEntry, nsIHistoryEntry,
nsISHEntryInternal)
NS_IMPL_ISUPPORTS5(nsSHEntry, nsISHContainer, nsISHEntry, nsIHistoryEntry,
nsIMutationObserver, nsISHEntryInternal)
//*****************************************************************************
// nsSHEntry: nsISHEntry
@ -167,13 +251,35 @@ NS_IMETHODIMP nsSHEntry::SetReferrerURI(nsIURI *aReferrerURI)
NS_IMETHODIMP
nsSHEntry::SetContentViewer(nsIContentViewer *aViewer)
{
return mShared->SetContentViewer(aViewer);
NS_PRECONDITION(!aViewer || !mContentViewer, "SHEntry already contains viewer");
if (mContentViewer || !aViewer) {
DropPresentationState();
}
mContentViewer = aViewer;
if (mContentViewer) {
gHistoryTracker->AddObject(this);
nsCOMPtr<nsIDOMDocument> domDoc;
mContentViewer->GetDOMDocument(getter_AddRefs(domDoc));
// Store observed document in strong pointer in case it is removed from
// the contentviewer
mDocument = do_QueryInterface(domDoc);
if (mDocument) {
mDocument->SetBFCacheEntry(this);
mDocument->AddMutationObserver(this);
}
}
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::GetContentViewer(nsIContentViewer **aResult)
{
*aResult = mShared->mContentViewer;
*aResult = mContentViewer;
NS_IF_ADDREF(*aResult);
return NS_OK;
}
@ -213,14 +319,14 @@ nsSHEntry::GetAnyContentViewer(nsISHEntry **aOwnerEntry,
NS_IMETHODIMP
nsSHEntry::SetSticky(PRBool aSticky)
{
mShared->mSticky = aSticky;
mSticky = aSticky;
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::GetSticky(PRBool *aSticky)
{
*aSticky = mShared->mSticky;
*aSticky = mSticky;
return NS_OK;
}
@ -259,18 +365,16 @@ NS_IMETHODIMP nsSHEntry::SetPostData(nsIInputStream* aPostData)
NS_IMETHODIMP nsSHEntry::GetLayoutHistoryState(nsILayoutHistoryState** aResult)
{
*aResult = mShared->mLayoutHistoryState;
*aResult = mLayoutHistoryState;
NS_IF_ADDREF(*aResult);
return NS_OK;
}
NS_IMETHODIMP nsSHEntry::SetLayoutHistoryState(nsILayoutHistoryState* aState)
{
mShared->mLayoutHistoryState = aState;
if (mShared->mLayoutHistoryState) {
mShared->mLayoutHistoryState->
SetScrollPositionOnly(!mShared->mSaveLayoutState);
}
mLayoutHistoryState = aState;
if (mLayoutHistoryState)
mLayoutHistoryState->SetScrollPositionOnly(!mSaveLayoutState);
return NS_OK;
}
@ -299,73 +403,91 @@ NS_IMETHODIMP nsSHEntry::SetID(PRUint32 aID)
return NS_OK;
}
nsSHEntryShared* nsSHEntry::GetSharedState()
NS_IMETHODIMP nsSHEntry::GetDocIdentifier(PRUint64 * aResult)
{
return mShared;
*aResult = mDocIdentifier;
return NS_OK;
}
NS_IMETHODIMP nsSHEntry::SetDocIdentifier(PRUint64 aDocIdentifier)
{
// This ensures that after a session restore, gEntryDocIdentifier is greater
// than all SHEntries' docIdentifiers, which ensures that we'll never repeat
// a doc identifier.
if (aDocIdentifier >= gEntryDocIdentifier)
gEntryDocIdentifier = aDocIdentifier + 1;
mDocIdentifier = aDocIdentifier;
return NS_OK;
}
NS_IMETHODIMP nsSHEntry::SetUniqueDocIdentifier()
{
mDocIdentifier = gEntryDocIdentifier++;
return NS_OK;
}
NS_IMETHODIMP nsSHEntry::GetIsSubFrame(PRBool * aFlag)
{
*aFlag = mShared->mIsFrameNavigation;
*aFlag = mIsFrameNavigation;
return NS_OK;
}
NS_IMETHODIMP nsSHEntry::SetIsSubFrame(PRBool aFlag)
{
mShared->mIsFrameNavigation = aFlag;
mIsFrameNavigation = aFlag;
return NS_OK;
}
NS_IMETHODIMP nsSHEntry::GetCacheKey(nsISupports** aResult)
{
*aResult = mShared->mCacheKey;
*aResult = mCacheKey;
NS_IF_ADDREF(*aResult);
return NS_OK;
}
NS_IMETHODIMP nsSHEntry::SetCacheKey(nsISupports* aCacheKey)
{
mShared->mCacheKey = aCacheKey;
mCacheKey = aCacheKey;
return NS_OK;
}
NS_IMETHODIMP nsSHEntry::GetSaveLayoutStateFlag(PRBool * aFlag)
{
*aFlag = mShared->mSaveLayoutState;
*aFlag = mSaveLayoutState;
return NS_OK;
}
NS_IMETHODIMP nsSHEntry::SetSaveLayoutStateFlag(PRBool aFlag)
{
mShared->mSaveLayoutState = aFlag;
if (mShared->mLayoutHistoryState) {
mShared->mLayoutHistoryState->SetScrollPositionOnly(!aFlag);
}
mSaveLayoutState = aFlag;
if (mLayoutHistoryState)
mLayoutHistoryState->SetScrollPositionOnly(!aFlag);
return NS_OK;
}
NS_IMETHODIMP nsSHEntry::GetExpirationStatus(PRBool * aFlag)
{
*aFlag = mShared->mExpired;
*aFlag = mExpired;
return NS_OK;
}
NS_IMETHODIMP nsSHEntry::SetExpirationStatus(PRBool aFlag)
{
mShared->mExpired = aFlag;
mExpired = aFlag;
return NS_OK;
}
NS_IMETHODIMP nsSHEntry::GetContentType(nsACString& aContentType)
{
aContentType = mShared->mContentType;
aContentType = mContentType;
return NS_OK;
}
NS_IMETHODIMP nsSHEntry::SetContentType(const nsACString& aContentType)
{
mShared->mContentType = aContentType;
mContentType = aContentType;
return NS_OK;
}
@ -380,27 +502,26 @@ nsSHEntry::Create(nsIURI * aURI, const nsAString &aTitle,
mURI = aURI;
mTitle = aTitle;
mPostData = aInputStream;
mCacheKey = aCacheKey;
mContentType = aContentType;
mOwner = aOwner;
mDocShellID = aDocShellID;
mDynamicallyCreated = aDynamicCreation;
// Set the LoadType by default to loadHistory during creation
mLoadType = (PRUint32) nsIDocShellLoadInfo::loadHistory;
mShared->mCacheKey = aCacheKey;
mShared->mContentType = aContentType;
mShared->mOwner = aOwner;
mShared->mDocShellID = aDocShellID;
mShared->mDynamicallyCreated = aDynamicCreation;
// By default all entries are set false for subframe flag.
// nsDocShell::CloneAndReplace() which creates entries for
// all subframe navigations, sets the flag to true.
mShared->mIsFrameNavigation = PR_FALSE;
mIsFrameNavigation = PR_FALSE;
// By default we save LayoutHistoryState
mShared->mSaveLayoutState = PR_TRUE;
mShared->mLayoutHistoryState = aLayoutHistoryState;
mSaveLayoutState = PR_TRUE;
mLayoutHistoryState = aLayoutHistoryState;
//By default the page is not expired
mShared->mExpired = PR_FALSE;
mExpired = PR_FALSE;
return NS_OK;
}
@ -409,6 +530,8 @@ NS_IMETHODIMP
nsSHEntry::Clone(nsISHEntry ** aResult)
{
*aResult = new nsSHEntry(*this);
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
@ -417,7 +540,7 @@ NS_IMETHODIMP
nsSHEntry::GetParent(nsISHEntry ** aResult)
{
NS_ENSURE_ARG_POINTER(aResult);
*aResult = mShared->mParent;
*aResult = mParent;
NS_IF_ADDREF(*aResult);
return NS_OK;
}
@ -430,95 +553,49 @@ nsSHEntry::SetParent(nsISHEntry * aParent)
*
* XXX this method should not be scriptable if this is the case!!
*/
mShared->mParent = aParent;
mParent = aParent;
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::SetWindowState(nsISupports *aState)
{
mShared->mWindowState = aState;
mWindowState = aState;
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::GetWindowState(nsISupports **aState)
{
NS_IF_ADDREF(*aState = mShared->mWindowState);
NS_IF_ADDREF(*aState = mWindowState);
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::SetViewerBounds(const nsIntRect &aBounds)
{
mShared->mViewerBounds = aBounds;
mViewerBounds = aBounds;
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::GetViewerBounds(nsIntRect &aBounds)
{
aBounds = mShared->mViewerBounds;
aBounds = mViewerBounds;
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::GetOwner(nsISupports **aOwner)
{
NS_IF_ADDREF(*aOwner = mShared->mOwner);
NS_IF_ADDREF(*aOwner = mOwner);
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::SetOwner(nsISupports *aOwner)
{
mShared->mOwner = aOwner;
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::GetBFCacheEntry(nsIBFCacheEntry **aEntry)
{
NS_ENSURE_ARG_POINTER(aEntry);
NS_IF_ADDREF(*aEntry = mShared);
return NS_OK;
}
PRBool
nsSHEntry::HasBFCacheEntry(nsIBFCacheEntry *aEntry)
{
return static_cast<nsIBFCacheEntry*>(mShared) == aEntry;
}
NS_IMETHODIMP
nsSHEntry::AdoptBFCacheEntry(nsISHEntry *aEntry)
{
nsCOMPtr<nsISHEntryInternal> shEntry = do_QueryInterface(aEntry);
NS_ENSURE_STATE(shEntry);
nsSHEntryShared *shared = shEntry->GetSharedState();
NS_ENSURE_STATE(shared);
mShared = shared;
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::SharesDocumentWith(nsISHEntry *aEntry, PRBool *aOut)
{
NS_ENSURE_ARG_POINTER(aOut);
nsCOMPtr<nsISHEntryInternal> internal = do_QueryInterface(aEntry);
NS_ENSURE_STATE(internal);
*aOut = mShared == internal->GetSharedState();
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::AbandonBFCacheEntry()
{
mShared = nsSHEntryShared::Duplicate(mShared);
mOwner = aOwner;
return NS_OK;
}
@ -676,77 +753,256 @@ NS_IMETHODIMP
nsSHEntry::AddChildShell(nsIDocShellTreeItem *aShell)
{
NS_ASSERTION(aShell, "Null child shell added to history entry");
mShared->mChildShells.AppendObject(aShell);
mChildShells.AppendObject(aShell);
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::ChildShellAt(PRInt32 aIndex, nsIDocShellTreeItem **aShell)
{
NS_IF_ADDREF(*aShell = mShared->mChildShells.SafeObjectAt(aIndex));
NS_IF_ADDREF(*aShell = mChildShells.SafeObjectAt(aIndex));
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::ClearChildShells()
{
mShared->mChildShells.Clear();
mChildShells.Clear();
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::GetRefreshURIList(nsISupportsArray **aList)
{
NS_IF_ADDREF(*aList = mShared->mRefreshURIList);
NS_IF_ADDREF(*aList = mRefreshURIList);
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::SetRefreshURIList(nsISupportsArray *aList)
{
mShared->mRefreshURIList = aList;
mRefreshURIList = aList;
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::SyncPresentationState()
{
return mShared->SyncPresentationState();
if (mContentViewer && mWindowState) {
// If we have a content viewer and a window state, we should be ok.
return NS_OK;
}
DropPresentationState();
return NS_OK;
}
void
nsSHEntry::DropPresentationState()
{
nsRefPtr<nsSHEntry> kungFuDeathGrip = this;
if (mDocument) {
mDocument->SetBFCacheEntry(nsnull);
mDocument->RemoveMutationObserver(this);
mDocument = nsnull;
}
if (mContentViewer)
mContentViewer->ClearHistoryEntry();
StopTrackingEntry(this);
mContentViewer = nsnull;
mSticky = PR_TRUE;
mWindowState = nsnull;
mViewerBounds.SetRect(0, 0, 0, 0);
mChildShells.Clear();
mRefreshURIList = nsnull;
mEditorData = nsnull;
}
void
nsSHEntry::Expire()
{
// This entry has timed out. If we still have a content viewer, we need to
// get it evicted.
if (!mContentViewer)
return;
nsCOMPtr<nsISupports> container;
mContentViewer->GetContainer(getter_AddRefs(container));
nsCOMPtr<nsIDocShellTreeItem> treeItem = do_QueryInterface(container);
if (!treeItem)
return;
// We need to find the root DocShell since only that object has an
// SHistory and we need the SHistory to evict content viewers
nsCOMPtr<nsIDocShellTreeItem> root;
treeItem->GetSameTypeRootTreeItem(getter_AddRefs(root));
nsCOMPtr<nsIWebNavigation> webNav = do_QueryInterface(root);
nsCOMPtr<nsISHistory> history;
webNav->GetSessionHistory(getter_AddRefs(history));
nsCOMPtr<nsISHistoryInternal> historyInt = do_QueryInterface(history);
if (!historyInt)
return;
historyInt->EvictExpiredContentViewerForEntry(this);
}
//*****************************************************************************
// nsSHEntry: nsIMutationObserver
//*****************************************************************************
void
nsSHEntry::NodeWillBeDestroyed(const nsINode* aNode)
{
NS_NOTREACHED("Document destroyed while we're holding a strong ref to it");
}
void
nsSHEntry::CharacterDataWillChange(nsIDocument* aDocument,
nsIContent* aContent,
CharacterDataChangeInfo* aInfo)
{
}
void
nsSHEntry::CharacterDataChanged(nsIDocument* aDocument,
nsIContent* aContent,
CharacterDataChangeInfo* aInfo)
{
RemoveFromBFCacheAsync();
}
void
nsSHEntry::AttributeWillChange(nsIDocument* aDocument,
dom::Element* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
}
void
nsSHEntry::AttributeChanged(nsIDocument* aDocument,
dom::Element* aElement,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
RemoveFromBFCacheAsync();
}
void
nsSHEntry::ContentAppended(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aFirstNewContent,
PRInt32 /* unused */)
{
RemoveFromBFCacheAsync();
}
void
nsSHEntry::ContentInserted(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 /* unused */)
{
RemoveFromBFCacheAsync();
}
void
nsSHEntry::ContentRemoved(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer,
nsIContent* aPreviousSibling)
{
RemoveFromBFCacheAsync();
}
void
nsSHEntry::ParentChainChanged(nsIContent *aContent)
{
}
class DestroyViewerEvent : public nsRunnable
{
public:
DestroyViewerEvent(nsIContentViewer* aViewer, nsIDocument* aDocument)
: mViewer(aViewer),
mDocument(aDocument)
{}
NS_IMETHOD Run()
{
if (mViewer)
mViewer->Destroy();
return NS_OK;
}
nsCOMPtr<nsIContentViewer> mViewer;
nsCOMPtr<nsIDocument> mDocument;
};
void
nsSHEntry::RemoveFromBFCacheSync()
{
mShared->RemoveFromBFCacheSync();
NS_ASSERTION(mContentViewer && mDocument,
"we're not in the bfcache!");
nsCOMPtr<nsIContentViewer> viewer = mContentViewer;
DropPresentationState();
// Warning! The call to DropPresentationState could have dropped the last
// reference to this nsSHEntry, so no accessing members beyond here.
if (viewer) {
viewer->Destroy();
}
}
void
nsSHEntry::RemoveFromBFCacheAsync()
{
mShared->RemoveFromBFCacheAsync();
NS_ASSERTION(mContentViewer && mDocument,
"we're not in the bfcache!");
// Release the reference to the contentviewer asynchronously so that the
// document doesn't get nuked mid-mutation.
nsCOMPtr<nsIRunnable> evt =
new DestroyViewerEvent(mContentViewer, mDocument);
nsresult rv = NS_DispatchToCurrentThread(evt);
if (NS_FAILED(rv)) {
NS_WARNING("failed to dispatch DestroyViewerEvent");
}
else {
// Drop presentation. Also ensures that we don't post more then one
// PLEvent. Only do this if we succeeded in posting the event since
// otherwise the document could be torn down mid mutation causing crashes.
DropPresentationState();
}
// Warning! The call to DropPresentationState could have dropped the last
// reference to this nsSHEntry, so no accessing members beyond here.
}
nsDocShellEditorData*
nsSHEntry::ForgetEditorData()
{
// XXX jlebar Check how this is used.
return mShared->mEditorData.forget();
return mEditorData.forget();
}
void
nsSHEntry::SetEditorData(nsDocShellEditorData* aData)
{
NS_ASSERTION(!(aData && mShared->mEditorData),
NS_ASSERTION(!(aData && mEditorData),
"We're going to overwrite an owning ref!");
if (mShared->mEditorData != aData) {
mShared->mEditorData = aData;
}
if (mEditorData != aData)
mEditorData = aData;
}
PRBool
nsSHEntry::HasDetachedEditor()
{
return mShared->mEditorData != nsnull;
return mEditorData != nsnull;
}
NS_IMETHODIMP
@ -767,7 +1023,7 @@ nsSHEntry::SetStateData(nsIStructuredCloneContainer *aContainer)
NS_IMETHODIMP
nsSHEntry::IsDynamicallyAdded(PRBool* aAdded)
{
*aAdded = mShared->mDynamicallyCreated;
*aAdded = mDynamicallyCreated;
return NS_OK;
}
@ -790,14 +1046,14 @@ nsSHEntry::HasDynamicallyAddedChild(PRBool* aAdded)
NS_IMETHODIMP
nsSHEntry::GetDocshellID(PRUint64* aID)
{
*aID = mShared->mDocShellID;
*aID = mDocShellID;
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::SetDocshellID(PRUint64 aID)
{
mShared->mDocShellID = aID;
mDocShellID = aID;
return NS_OK;
}
@ -805,13 +1061,14 @@ nsSHEntry::SetDocshellID(PRUint64 aID)
NS_IMETHODIMP
nsSHEntry::GetLastTouched(PRUint32 *aLastTouched)
{
*aLastTouched = mShared->mLastTouched;
*aLastTouched = mLastTouched;
return NS_OK;
}
NS_IMETHODIMP
nsSHEntry::SetLastTouched(PRUint32 aLastTouched)
{
mShared->mLastTouched = aLastTouched;
mLastTouched = aLastTouched;
return NS_OK;
}

64
docshell/shistory/src/nsSHEntry.h
View File

@ -42,21 +42,28 @@
// Helper Classes
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
#include "nsCOMArray.h"
#include "nsString.h"
#include "nsAutoPtr.h"
// Interfaces needed
#include "nsIContentViewer.h"
#include "nsIInputStream.h"
#include "nsILayoutHistoryState.h"
#include "nsISHEntry.h"
#include "nsISHContainer.h"
#include "nsIURI.h"
#include "nsIEnumerator.h"
#include "nsIHistoryEntry.h"
class nsSHEntryShared;
#include "nsRect.h"
#include "nsISupportsArray.h"
#include "nsIMutationObserver.h"
#include "nsExpirationTracker.h"
#include "nsDocShellEditorData.h"
class nsSHEntry : public nsISHEntry,
public nsISHContainer,
public nsIMutationObserver,
public nsISHEntryInternal
{
public:
@ -68,30 +75,51 @@ public:
NS_DECL_NSISHENTRY
NS_DECL_NSISHENTRYINTERNAL
NS_DECL_NSISHCONTAINER
NS_DECL_NSIMUTATIONOBSERVER
void DropPresentationState();
void Expire();
nsExpirationState *GetExpirationState() { return &mExpirationState; }
static nsresult Startup();
static void Shutdown();
private:
~nsSHEntry();
// We share the state in here with other SHEntries which correspond to the
// same document.
nsRefPtr<nsSHEntryShared> mShared;
// See nsSHEntry.idl for comments on these members.
nsCOMPtr<nsIURI> mURI;
nsCOMPtr<nsIURI> mReferrerURI;
nsString mTitle;
nsCOMPtr<nsIInputStream> mPostData;
PRUint32 mLoadType;
PRUint32 mID;
PRInt32 mScrollPositionX;
PRInt32 mScrollPositionY;
nsCOMArray<nsISHEntry> mChildren;
PRPackedBool mURIWasModified;
nsCOMPtr<nsIURI> mURI;
nsCOMPtr<nsIURI> mReferrerURI;
nsCOMPtr<nsIContentViewer> mContentViewer;
nsCOMPtr<nsIDocument> mDocument; // document currently being observed
nsString mTitle;
nsCOMPtr<nsIInputStream> mPostData;
nsCOMPtr<nsILayoutHistoryState> mLayoutHistoryState;
nsCOMArray<nsISHEntry> mChildren;
PRUint32 mLoadType;
PRUint32 mID;
PRInt64 mDocIdentifier;
PRInt32 mScrollPositionX;
PRInt32 mScrollPositionY;
PRPackedBool mURIWasModified;
PRPackedBool mIsFrameNavigation;
PRPackedBool mSaveLayoutState;
PRPackedBool mExpired;
PRPackedBool mSticky;
PRPackedBool mDynamicallyCreated;
nsCString mContentType;
nsCOMPtr<nsISupports> mCacheKey;
nsISHEntry * mParent; // weak reference
nsCOMPtr<nsISupports> mWindowState;
nsIntRect mViewerBounds;
nsCOMArray<nsIDocShellTreeItem> mChildShells;
nsCOMPtr<nsISupportsArray> mRefreshURIList;
nsCOMPtr<nsISupports> mOwner;
nsExpirationState mExpirationState;
nsAutoPtr<nsDocShellEditorData> mEditorData;
PRUint64 mDocShellID;
PRUint32 mLastTouched;
nsCOMPtr<nsIStructuredCloneContainer> mStateData;
};

348
docshell/shistory/src/nsSHEntryShared.cpp
View File

@ -1,348 +0,0 @@
#include "nsSHEntryShared.h"
#include "nsISHistory.h"
#include "nsISHistoryInternal.h"
#include "nsIDocument.h"
#include "nsIWebNavigation.h"
#include "nsIContentViewer.h"
#include "nsIDocShellTreeItem.h"
#include "nsISupportsArray.h"
#include "nsDocShellEditorData.h"
#include "nsThreadUtils.h"
#include "nsILayoutHistoryState.h"
namespace dom = mozilla::dom;
// Hardcode this to time out unused content viewers after 30 minutes
// XXX jlebar shouldn't this be a pref?
#define CONTENT_VIEWER_TIMEOUT_SECONDS (30*60)
typedef nsExpirationTracker<nsSHEntryShared, 3> HistoryTrackerBase;
class HistoryTracker : public HistoryTrackerBase {
public:
// Expire cached contentviewers after 20-30 minutes in the cache.
HistoryTracker()
: HistoryTrackerBase(1000 * CONTENT_VIEWER_TIMEOUT_SECONDS / 2)
{
}
protected:
virtual void NotifyExpired(nsSHEntryShared *aObj) {
RemoveObject(aObj);
aObj->Expire();
}
};
static HistoryTracker *gHistoryTracker = nsnull;
void
nsSHEntryShared::Startup()
{
gHistoryTracker = new HistoryTracker();
}
void
nsSHEntryShared::Shutdown()
{
delete gHistoryTracker;
gHistoryTracker = nsnull;
}
nsSHEntryShared::nsSHEntryShared()
: mDocShellID(0)
, mParent(nsnull)
, mIsFrameNavigation(PR_FALSE)
, mSaveLayoutState(PR_TRUE)
, mSticky(PR_TRUE)
, mDynamicallyCreated(PR_FALSE)
, mLastTouched(0)
, mExpired(PR_FALSE)
, mViewerBounds(0, 0, 0, 0)
{
}
nsSHEntryShared::~nsSHEntryShared()
{
RemoveFromExpirationTracker();
#ifdef DEBUG
// Check that we're not still on track to expire. We shouldn't be, because
// we just removed ourselves!
nsExpirationTracker<nsSHEntryShared, 3>::Iterator
iterator(gHistoryTracker);
nsSHEntryShared *elem;
while ((elem = iterator.Next()) != nsnull) {
NS_ASSERTION(elem != this, "Found dead entry still in the tracker!");
}
#endif
if (mContentViewer) {
RemoveFromBFCacheSync();
}
}
NS_IMPL_ISUPPORTS2(nsSHEntryShared, nsIBFCacheEntry, nsIMutationObserver)
already_AddRefed<nsSHEntryShared>
nsSHEntryShared::Duplicate(nsSHEntryShared *aEntry)
{
nsRefPtr<nsSHEntryShared> newEntry = new nsSHEntryShared();
newEntry->mDocShellID = aEntry->mDocShellID;
newEntry->mChildShells.AppendObjects(aEntry->mChildShells);
newEntry->mOwner = aEntry->mOwner;
newEntry->mParent = aEntry->mParent;
newEntry->mContentType.Assign(aEntry->mContentType);
newEntry->mIsFrameNavigation = aEntry->mIsFrameNavigation;
newEntry->mSaveLayoutState = aEntry->mSaveLayoutState;
newEntry->mSticky = aEntry->mSticky;
newEntry->mDynamicallyCreated = aEntry->mDynamicallyCreated;
newEntry->mCacheKey = aEntry->mCacheKey;
newEntry->mLastTouched = aEntry->mLastTouched;
return newEntry.forget();
}
void nsSHEntryShared::RemoveFromExpirationTracker()
{
if (GetExpirationState()->IsTracked()) {
gHistoryTracker->RemoveObject(this);
}
}
nsresult
nsSHEntryShared::SyncPresentationState()
{
if (mContentViewer && mWindowState) {
// If we have a content viewer and a window state, we should be ok.
return NS_OK;
}
DropPresentationState();
return NS_OK;
}
void
nsSHEntryShared::DropPresentationState()
{
nsRefPtr<nsSHEntryShared> kungFuDeathGrip = this;
if (mDocument) {
mDocument->SetBFCacheEntry(nsnull);
mDocument->RemoveMutationObserver(this);
mDocument = nsnull;
}
if (mContentViewer) {
mContentViewer->ClearHistoryEntry();
}
RemoveFromExpirationTracker();
mContentViewer = nsnull;
mSticky = PR_TRUE;
mWindowState = nsnull;
mViewerBounds.SetRect(0, 0, 0, 0);
mChildShells.Clear();
mRefreshURIList = nsnull;
mEditorData = nsnull;
}
void
nsSHEntryShared::Expire()
{
// This entry has timed out. If we still have a content viewer, we need to
// evict it.
if (!mContentViewer) {
return;
}
nsCOMPtr<nsISupports> container;
mContentViewer->GetContainer(getter_AddRefs(container));
nsCOMPtr<nsIDocShellTreeItem> treeItem = do_QueryInterface(container);
if (!treeItem) {
return;
}
// We need to find the root DocShell since only that object has an
// SHistory and we need the SHistory to evict content viewers
nsCOMPtr<nsIDocShellTreeItem> root;
treeItem->GetSameTypeRootTreeItem(getter_AddRefs(root));
nsCOMPtr<nsIWebNavigation> webNav = do_QueryInterface(root);
nsCOMPtr<nsISHistory> history;
webNav->GetSessionHistory(getter_AddRefs(history));
nsCOMPtr<nsISHistoryInternal> historyInt = do_QueryInterface(history);
if (!historyInt) {
return;
}
historyInt->EvictExpiredContentViewerForEntry(this);
}
nsresult
nsSHEntryShared::SetContentViewer(nsIContentViewer *aViewer)
{
NS_PRECONDITION(!aViewer || !mContentViewer,
"SHEntryShared already contains viewer");
if (mContentViewer || !aViewer) {
DropPresentationState();
}
mContentViewer = aViewer;
if (mContentViewer) {
gHistoryTracker->AddObject(this);
nsCOMPtr<nsIDOMDocument> domDoc;
mContentViewer->GetDOMDocument(getter_AddRefs(domDoc));
// Store observed document in strong pointer in case it is removed from
// the contentviewer
mDocument = do_QueryInterface(domDoc);
if (mDocument) {
mDocument->SetBFCacheEntry(this);
mDocument->AddMutationObserver(this);
}
}
return NS_OK;
}
nsresult
nsSHEntryShared::RemoveFromBFCacheSync()
{
NS_ASSERTION(mContentViewer && mDocument,
"we're not in the bfcache!");
nsCOMPtr<nsIContentViewer> viewer = mContentViewer;
DropPresentationState();
// Warning! The call to DropPresentationState could have dropped the last
// reference to this object, so don't access members beyond here.
if (viewer) {
viewer->Destroy();
}
return NS_OK;
}
class DestroyViewerEvent : public nsRunnable
{
public:
DestroyViewerEvent(nsIContentViewer* aViewer, nsIDocument* aDocument)
: mViewer(aViewer),
mDocument(aDocument)
{}
NS_IMETHOD Run()
{
if (mViewer) {
mViewer->Destroy();
}
return NS_OK;
}
nsCOMPtr<nsIContentViewer> mViewer;
nsCOMPtr<nsIDocument> mDocument;
};
nsresult
nsSHEntryShared::RemoveFromBFCacheAsync()
{
NS_ASSERTION(mContentViewer && mDocument,
"we're not in the bfcache!");
// Release the reference to the contentviewer asynchronously so that the
// document doesn't get nuked mid-mutation.
nsCOMPtr<nsIRunnable> evt =
new DestroyViewerEvent(mContentViewer, mDocument);
nsresult rv = NS_DispatchToCurrentThread(evt);
if (NS_FAILED(rv)) {
NS_WARNING("failed to dispatch DestroyViewerEvent");
} else {
// Drop presentation. Only do this if we succeeded in posting the event
// since otherwise the document could be torn down mid-mutation, causing
// crashes.
DropPresentationState();
}
// Careful! The call to DropPresentationState could have dropped the last
// reference to this nsSHEntryShared, so don't access members beyond here.
return NS_OK;
}
//*****************************************************************************
// nsSHEntryShared: nsIMutationObserver
//*****************************************************************************
void
nsSHEntryShared::NodeWillBeDestroyed(const nsINode* aNode)
{
NS_NOTREACHED("Document destroyed while we're holding a strong ref to it");
}
void
nsSHEntryShared::CharacterDataWillChange(nsIDocument* aDocument,
nsIContent* aContent,
CharacterDataChangeInfo* aInfo)
{
}
void
nsSHEntryShared::CharacterDataChanged(nsIDocument* aDocument,
nsIContent* aContent,
CharacterDataChangeInfo* aInfo)
{
RemoveFromBFCacheAsync();
}
void
nsSHEntryShared::AttributeWillChange(nsIDocument* aDocument,
dom::Element* aContent,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
}
void
nsSHEntryShared::AttributeChanged(nsIDocument* aDocument,
dom::Element* aElement,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
RemoveFromBFCacheAsync();
}
void
nsSHEntryShared::ContentAppended(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aFirstNewContent,
PRInt32 /* unused */)
{
RemoveFromBFCacheAsync();
}
void
nsSHEntryShared::ContentInserted(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 /* unused */)
{
RemoveFromBFCacheAsync();
}
void
nsSHEntryShared::ContentRemoved(nsIDocument* aDocument,
nsIContent* aContainer,
nsIContent* aChild,
PRInt32 aIndexInContainer,
nsIContent* aPreviousSibling)
{
RemoveFromBFCacheAsync();
}
void
nsSHEntryShared::ParentChainChanged(nsIContent *aContent)
{
}

88
docshell/shistory/src/nsSHEntryShared.h
View File

@ -1,88 +0,0 @@
#ifndef nsSHEntryShared_h__
#define nsSHEntryShared_h__
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
#include "nsCOMArray.h"
#include "nsIBFCacheEntry.h"
#include "nsIMutationObserver.h"
#include "nsExpirationTracker.h"
#include "nsRect.h"
class nsSHEntry;
class nsISHEntry;
class nsIDocument;
class nsIContentViewer;
class nsIDocShellTreeItem;
class nsILayoutHistoryState;
class nsISupportsArray;
class nsDocShellEditorData;
// A document may have multiple SHEntries, either due to hash navigations or
// calls to history.pushState. SHEntries corresponding to the same document
// share many members; in particular, they share state related to the
// back/forward cache.
//
// nsSHEntryShared is the vehicle for this sharing.
class nsSHEntryShared : public nsIBFCacheEntry,
public nsIMutationObserver
{
public:
static void Startup();
static void Shutdown();
nsSHEntryShared();
~nsSHEntryShared();
NS_DECL_ISUPPORTS
NS_DECL_NSIMUTATIONOBSERVER
NS_DECL_NSIBFCACHEENTRY
private:
friend class nsSHEntry;
friend class HistoryTracker;
friend class nsExpirationTracker<nsSHEntryShared, 3>;
nsExpirationState *GetExpirationState() { return &mExpirationState; }
static already_AddRefed<nsSHEntryShared> Duplicate(nsSHEntryShared *aEntry);
void SetDocIdentifier(PRUint64 aDocIdentifier);
void RemoveFromExpirationTracker();
void Expire();
nsresult SyncPresentationState();
void DropPresentationState();
nsresult SetContentViewer(nsIContentViewer *aViewer);
// See nsISHEntry.idl for an explanation of these members.
// These members are copied by nsSHEntryShared::Duplicate(). If you add a
// member here, be sure to update the Duplicate() implementation.
PRUint64 mDocShellID;
nsCOMArray<nsIDocShellTreeItem> mChildShells;
nsCOMPtr<nsISupports> mOwner;
nsISHEntry* mParent;
nsCString mContentType;
PRPackedBool mIsFrameNavigation;
PRPackedBool mSaveLayoutState;
PRPackedBool mSticky;
PRPackedBool mDynamicallyCreated;
nsCOMPtr<nsISupports> mCacheKey;
PRUint32 mLastTouched;
// These members aren't copied by nsSHEntryShared::Duplicate() because
// they're specific to a particular content viewer.
nsCOMPtr<nsIContentViewer> mContentViewer;
nsCOMPtr<nsIDocument> mDocument;
nsCOMPtr<nsILayoutHistoryState> mLayoutHistoryState;
PRPackedBool mExpired;
nsCOMPtr<nsISupports> mWindowState;
nsIntRect mViewerBounds;
nsCOMPtr<nsISupportsArray> mRefreshURIList;
nsExpirationState mExpirationState;
nsAutoPtr<nsDocShellEditorData> mEditorData;
};
#endif

526
docshell/shistory/src/nsSHistory.cpp
View File

@ -72,10 +72,12 @@ using namespace mozilla;
#define PREF_SHISTORY_SIZE "browser.sessionhistory.max_entries"
#define PREF_SHISTORY_MAX_TOTAL_VIEWERS "browser.sessionhistory.max_total_viewers"
#define PREF_SHISTORY_OPTIMIZE_EVICTION "browser.sessionhistory.optimize_eviction"
static const char* kObservedPrefs[] = {
PREF_SHISTORY_SIZE,
PREF_SHISTORY_MAX_TOTAL_VIEWERS,
PREF_SHISTORY_OPTIMIZE_EVICTION,
nsnull
};
@ -88,46 +90,16 @@ static PRCList gSHistoryList;
// means we will calculate how many viewers to cache based on total memory
PRInt32 nsSHistory::sHistoryMaxTotalViewers = -1;
// Whether we should optimize the search for which entry to evict,
// by evicting older entries first. See entryLastTouched in
// nsSHistory::EvictGlobalContentViewer().
// NB: After 4.0, we should remove this option and the corresponding
// pref - optimization should always be used
static PRBool gOptimizeEviction = PR_FALSE;
// A counter that is used to be able to know the order in which
// entries were touched, so that we can evict older entries first.
static PRUint32 gTouchCounter = 0;
static PRLogModuleInfo* gLogModule = PR_LOG_DEFINE("nsSHistory");
#define LOG(format) PR_LOG(gLogModule, PR_LOG_DEBUG, format)
// This macro makes it easier to print a log message which includes a URI's
// spec. Example use:
//
// nsIURI *uri = [...];
// LOG_SPEC(("The URI is %s.", _spec), uri);
//
#define LOG_SPEC(format, uri) \
PR_BEGIN_MACRO \
if (PR_LOG_TEST(gLogModule, PR_LOG_DEBUG)) { \
nsCAutoString _specStr(NS_LITERAL_CSTRING("(null)"));\
if (uri) { \
uri->GetSpec(_specStr); \
} \
const char* _spec = _specStr.get(); \
LOG(format); \
} \
PR_END_MACRO
// This macro makes it easy to log a message including an SHEntry's URI.
// For example:
//
// nsCOMPtr<nsISHEntry> shentry = [...];
// LOG_SHENTRY_SPEC(("shentry %p has uri %s.", shentry.get(), _spec), shentry);
//
#define LOG_SHENTRY_SPEC(format, shentry) \
PR_BEGIN_MACRO \
if (PR_LOG_TEST(gLogModule, PR_LOG_DEBUG)) { \
nsCOMPtr<nsIURI> uri; \
shentry->GetURI(getter_AddRefs(uri)); \
LOG_SPEC(format, uri); \
} \
PR_END_MACRO
enum HistCmd{
HIST_CMD_BACK,
HIST_CMD_FORWARD,
@ -162,60 +134,15 @@ nsSHistoryObserver::Observe(nsISupports *aSubject, const char *aTopic,
{
if (!strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID)) {
nsSHistory::UpdatePrefs();
nsSHistory::GloballyEvictContentViewers();
nsSHistory::EvictGlobalContentViewer();
} else if (!strcmp(aTopic, NS_CACHESERVICE_EMPTYCACHE_TOPIC_ID) ||
!strcmp(aTopic, "memory-pressure")) {
nsSHistory::GloballyEvictAllContentViewers();
nsSHistory::EvictAllContentViewersGlobally();
}
return NS_OK;
}
namespace {
already_AddRefed<nsIContentViewer>
GetContentViewerForTransaction(nsISHTransaction *aTrans)
{
nsCOMPtr<nsISHEntry> entry;
aTrans->GetSHEntry(getter_AddRefs(entry));
if (!entry) {
return nsnull;
}
nsCOMPtr<nsISHEntry> ownerEntry;
nsCOMPtr<nsIContentViewer> viewer;
entry->GetAnyContentViewer(getter_AddRefs(ownerEntry),
getter_AddRefs(viewer));
return viewer.forget();
}
void
EvictContentViewerForTransaction(nsISHTransaction *aTrans)
{
nsCOMPtr<nsISHEntry> entry;
aTrans->GetSHEntry(getter_AddRefs(entry));
nsCOMPtr<nsIContentViewer> viewer;
nsCOMPtr<nsISHEntry> ownerEntry;
entry->GetAnyContentViewer(getter_AddRefs(ownerEntry),
getter_AddRefs(viewer));
if (viewer) {
NS_ASSERTION(ownerEntry,
"Content viewer exists but its SHEntry is null");
LOG_SHENTRY_SPEC(("Evicting content viewer 0x%p for "
"owning SHEntry 0x%p at %s.",
viewer.get(), ownerEntry.get(), _spec), ownerEntry);
// Drop the presentation state before destroying the viewer, so that
// document teardown is able to correctly persist the state.
ownerEntry->SetContentViewer(nsnull);
ownerEntry->SyncPresentationState();
viewer->Destroy();
}
}
} // anonymous namespace
//*****************************************************************************
//*** nsSHistory: Object Management
//*****************************************************************************
@ -313,6 +240,7 @@ nsSHistory::UpdatePrefs()
Preferences::GetInt(PREF_SHISTORY_SIZE, &gHistoryMaxSize);
Preferences::GetInt(PREF_SHISTORY_MAX_TOTAL_VIEWERS,
&sHistoryMaxTotalViewers);
Preferences::GetBool(PREF_SHISTORY_OPTIMIZE_EVICTION, &gOptimizeEviction);
// If the pref is negative, that means we calculate how many viewers
// we think we should cache, based on total memory
if (sHistoryMaxTotalViewers < 0) {
@ -761,12 +689,12 @@ nsSHistory::GetListener(nsISHistoryListener ** aListener)
}
NS_IMETHODIMP
nsSHistory::EvictOutOfRangeContentViewers(PRInt32 aIndex)
nsSHistory::EvictContentViewers(PRInt32 aPreviousIndex, PRInt32 aIndex)
{
// Check our per SHistory object limit in the currently navigated SHistory
EvictOutOfRangeWindowContentViewers(aIndex);
EvictWindowContentViewers(aPreviousIndex, aIndex);
// Check our total limit across all SHistory objects
GloballyEvictContentViewers();
EvictGlobalContentViewer();
return NS_OK;
}
@ -775,14 +703,7 @@ nsSHistory::EvictAllContentViewers()
{
// XXXbz we don't actually do a good job of evicting things as we should, so
// we might have viewers quite far from mIndex. So just evict everything.
nsCOMPtr<nsISHTransaction> trans = mListRoot;
while (trans) {
EvictContentViewerForTransaction(trans);
nsISHTransaction *temp = trans;
temp->GetNext(getter_AddRefs(trans));
}
EvictContentViewersInRange(0, mLength);
return NS_OK;
}
@ -926,78 +847,103 @@ nsSHistory::ReloadCurrentEntry()
}
void
nsSHistory::EvictOutOfRangeWindowContentViewers(PRInt32 aIndex)
nsSHistory::EvictWindowContentViewers(PRInt32 aFromIndex, PRInt32 aToIndex)
{
// XXX rename method to EvictContentViewersExceptAroundIndex, or something.
// To enforce the per SHistory object limit on cached content viewers, we
// need to release all of the content viewers that are no longer in the
// "window" that now ends/begins at aToIndex. Existing content viewers
// should be in the window from
// aFromIndex - gHistoryMaxViewers to aFromIndex + gHistoryMaxViewers
//
// We make the assumption that entries outside this range have no viewers so
// that we don't have to walk the whole entire session history checking for
// content viewers.
// We need to release all content viewers that are no longer in the range
//
// aIndex - gHistoryMaxViewers to aIndex + gHistoryMaxViewers
//
// to ensure that this SHistory object isn't responsible for more than
// gHistoryMaxViewers content viewers. But our job is complicated by the
// fact that two transactions which are related by either hash navigations or
// history.pushState will have the same content viewer.
//
// To illustrate the issue, suppose gHistoryMaxViewers = 3 and we have four
// linked transactions in our history. Suppose we then add a new content
// viewer and call into this function. So the history looks like:
//
// A A A A B
// + *
//
// where the letters are content viewers and + and * denote the beginning and
// end of the range aIndex +/- gHistoryMaxViewers.
//
// Although one copy of the content viewer A exists outside the range, we
// don't want to evict A, because it has other copies in range!
//
// We therefore adjust our eviction strategy to read:
//
// Evict each content viewer outside the range aIndex -/+
// gHistoryMaxViewers, unless that content viewer also appears within the
// range.
//
// (Note that it's entirely legal to have two copies of one content viewer
// separated by a different content viewer -- call pushState twice, go back
// once, and refresh -- so we can't rely on identical viewers only appearing
// adjacent to one another.)
if (aIndex < 0) {
// This can happen on the first load of a page in a particular window
if (aFromIndex < 0 || aToIndex < 0) {
return;
}
NS_ASSERTION(aIndex < mLength, "aIndex is out of range");
if (aIndex >= mLength) {
NS_ASSERTION(aFromIndex < mLength, "aFromIndex is out of range");
NS_ASSERTION(aToIndex < mLength, "aToIndex is out of range");
if (aFromIndex >= mLength || aToIndex >= mLength) {
return;
}
// Calculate the range that's safe from eviction.
PRInt32 startSafeIndex = PR_MAX(0, aIndex - gHistoryMaxViewers);
PRInt32 endSafeIndex = PR_MIN(mLength, aIndex + gHistoryMaxViewers);
// These indices give the range of SHEntries whose content viewers will be
// evicted
PRInt32 startIndex, endIndex;
if (aToIndex > aFromIndex) { // going forward
endIndex = aToIndex - gHistoryMaxViewers;
if (endIndex <= 0) {
return;
}
startIndex = NS_MAX(0, aFromIndex - gHistoryMaxViewers);
} else { // going backward
startIndex = aToIndex + gHistoryMaxViewers + 1;
if (startIndex >= mLength) {
return;
}
endIndex = NS_MIN(mLength, aFromIndex + gHistoryMaxViewers + 1);
}
LOG(("EvictOutOfRangeWindowContentViewers(index=%d), "
"mLength=%d. Safe range [%d, %d]",
aIndex, mLength, startSafeIndex, endSafeIndex));
// The content viewers in range aIndex -/+ gHistoryMaxViewers will not be
// evicted. Collect a set of them so we don't accidentally evict one of them
// if it appears outside this range.
nsCOMArray<nsIContentViewer> safeViewers;
#ifdef DEBUG
nsCOMPtr<nsISHTransaction> trans;
GetTransactionAtIndex(startSafeIndex, getter_AddRefs(trans));
for (PRUint32 i = startSafeIndex; trans && i <= endSafeIndex; i++) {
nsCOMPtr<nsIContentViewer> viewer = GetContentViewerForTransaction(trans);
safeViewers.AppendObject(viewer);
GetTransactionAtIndex(0, getter_AddRefs(trans));
// Walk the full session history and check that entries outside the window
// around aFromIndex have no content viewers
for (PRInt32 i = 0; trans && i < mLength; ++i) {
if (i < aFromIndex - gHistoryMaxViewers ||
i > aFromIndex + gHistoryMaxViewers) {
nsCOMPtr<nsISHEntry> entry;
trans->GetSHEntry(getter_AddRefs(entry));
nsCOMPtr<nsIContentViewer> viewer;
nsCOMPtr<nsISHEntry> ownerEntry;
entry->GetAnyContentViewer(getter_AddRefs(ownerEntry),
getter_AddRefs(viewer));
NS_WARN_IF_FALSE(!viewer,
"ContentViewer exists outside gHistoryMaxViewer range");
}
nsISHTransaction *temp = trans;
temp->GetNext(getter_AddRefs(trans));
}
#endif
// Walk the SHistory list and evict any content viewers that aren't safe.
GetTransactionAtIndex(0, getter_AddRefs(trans));
while (trans) {
nsCOMPtr<nsIContentViewer> viewer = GetContentViewerForTransaction(trans);
if (safeViewers.IndexOf(viewer) == -1) {
EvictContentViewerForTransaction(trans);
EvictContentViewersInRange(startIndex, endIndex);
}
void
nsSHistory::EvictContentViewersInRange(PRInt32 aStart, PRInt32 aEnd)
{
nsCOMPtr<nsISHTransaction> trans;
GetTransactionAtIndex(aStart, getter_AddRefs(trans));
for (PRInt32 i = aStart; trans && i < aEnd; ++i) {
nsCOMPtr<nsISHEntry> entry;
trans->GetSHEntry(getter_AddRefs(entry));
nsCOMPtr<nsIContentViewer> viewer;
nsCOMPtr<nsISHEntry> ownerEntry;
entry->GetAnyContentViewer(getter_AddRefs(ownerEntry),
getter_AddRefs(viewer));
if (viewer) {
NS_ASSERTION(ownerEntry,
"ContentViewer exists but its SHEntry is null");
#ifdef DEBUG_PAGE_CACHE
nsCOMPtr<nsIURI> uri;
ownerEntry->GetURI(getter_AddRefs(uri));
nsCAutoString spec;
if (uri)
uri->GetSpec(spec);
printf("per SHistory limit: evicting content viewer: %s\n", spec.get());
#endif
// Drop the presentation state before destroying the viewer, so that
// document teardown is able to correctly persist the state.
ownerEntry->SetContentViewer(nsnull);
ownerEntry->SyncPresentationState();
viewer->Destroy();
}
nsISHTransaction *temp = trans;
@ -1005,153 +951,138 @@ nsSHistory::EvictOutOfRangeWindowContentViewers(PRInt32 aIndex)
}
}
namespace {
class TransactionAndDistance
{
public:
TransactionAndDistance(nsISHTransaction *aTrans, PRUint32 aDist)
: mTransaction(aTrans)
, mDistance(aDist)
{
mViewer = GetContentViewerForTransaction(aTrans);
NS_ASSERTION(mViewer, "Transaction should have a content viewer");
nsCOMPtr<nsISHEntry> shentry;
mTransaction->GetSHEntry(getter_AddRefs(shentry));
nsCOMPtr<nsISHEntryInternal> shentryInternal = do_QueryInterface(shentry);
if (shentryInternal) {
shentryInternal->GetLastTouched(&mLastTouched);
} else {
NS_WARNING("Can't cast to nsISHEntryInternal?");
mLastTouched = 0;
}
}
bool operator<(const TransactionAndDistance &aOther) const
{
// Compare distances first, and fall back to last-accessed times.
if (aOther.mDistance != this->mDistance) {
return this->mDistance < aOther.mDistance;
}
return this->mLastTouched < aOther.mLastTouched;
}
bool operator==(const TransactionAndDistance &aOther) const
{
// This is a little silly; we need == so the default comaprator can be
// instantiated, but this function is never actually called when we sort
// the list of TransactionAndDistance objects.
return aOther.mDistance == this->mDistance &&
aOther.mLastTouched == this->mLastTouched;
}
nsCOMPtr<nsISHTransaction> mTransaction;
nsCOMPtr<nsIContentViewer> mViewer;
PRUint32 mLastTouched;
PRInt32 mDistance;
};
} // anonymous namespace
//static
// static
void
nsSHistory::GloballyEvictContentViewers()
nsSHistory::EvictGlobalContentViewer()
{
// First, collect from each SHistory object the transactions which have a
// cached content viewer. Associate with each transaction its distance from
// its SHistory's current index.
// true until the total number of content viewers is <= total max
// The usual case is that we only need to evict one content viewer.
// However, if somebody resets the pref value, we might occasionally
// need to evict more than one.
PRBool shouldTryEviction = PR_TRUE;
while (shouldTryEviction) {
// Walk through our list of SHistory objects, looking for content
// viewers in the possible active window of all of the SHEntry objects.
// Keep track of the SHEntry object that has a ContentViewer and is
// farthest from the current focus in any SHistory object. The
// ContentViewer associated with that SHEntry will be evicted
PRInt32 distanceFromFocus = 0;
PRUint32 candidateLastTouched = 0;
nsCOMPtr<nsISHEntry> evictFromSHE;
nsCOMPtr<nsIContentViewer> evictViewer;
PRInt32 totalContentViewers = 0;
nsSHistory* shist = static_cast<nsSHistory*>
(PR_LIST_HEAD(&gSHistoryList));
while (shist != &gSHistoryList) {
// Calculate the window of SHEntries that could possibly have a content
// viewer. There could be up to gHistoryMaxViewers content viewers,
// but we don't know whether they are before or after the mIndex position
// in the SHEntry list. Just check both sides, to be safe.
PRInt32 startIndex = NS_MAX(0, shist->mIndex - gHistoryMaxViewers);
PRInt32 endIndex = NS_MIN(shist->mLength - 1,
shist->mIndex + gHistoryMaxViewers);
nsCOMPtr<nsISHTransaction> trans;
shist->GetTransactionAtIndex(startIndex, getter_AddRefs(trans));
nsTArray<TransactionAndDistance> transactions;
for (PRInt32 i = startIndex; trans && i <= endIndex; ++i) {
nsCOMPtr<nsISHEntry> entry;
trans->GetSHEntry(getter_AddRefs(entry));
nsCOMPtr<nsIContentViewer> viewer;
nsCOMPtr<nsISHEntry> ownerEntry;
entry->GetAnyContentViewer(getter_AddRefs(ownerEntry),
getter_AddRefs(viewer));
nsSHistory *shist = static_cast<nsSHistory*>(PR_LIST_HEAD(&gSHistoryList));
while (shist != &gSHistoryList) {
// Maintain a list of the transactions which have viewers and belong to
// this particular shist object. We'll add this list to the global list,
// |transactions|, eventually.
nsTArray<TransactionAndDistance> shTransactions;
// Content viewers are likely to exist only within shist->mIndex -/+
// gHistoryMaxViewers, so only search within that range.
//
// A content viewer might exist outside that range due to either:
//
// * history.pushState or hash navigations, in which case a copy of the
// content viewer should exist within the range, or
//
// * bugs which cause us not to call nsSHistory::EvictContentViewers()
// often enough. Once we do call EvictContentViewers() for the
// SHistory object in question, we'll do a full search of its history
// and evict the out-of-range content viewers, so we don't bother here.
//
PRInt32 startIndex = NS_MAX(0, shist->mIndex - gHistoryMaxViewers);
PRInt32 endIndex = NS_MIN(shist->mLength - 1,
shist->mIndex + gHistoryMaxViewers);
nsCOMPtr<nsISHTransaction> trans;
shist->GetTransactionAtIndex(startIndex, getter_AddRefs(trans));
for (PRInt32 i = startIndex; trans && i <= endIndex; i++) {
nsCOMPtr<nsIContentViewer> contentViewer =
GetContentViewerForTransaction(trans);
if (contentViewer) {
// Because one content viewer might belong to multiple SHEntries, we
// have to search through shTransactions to see if we already know
// about this content viewer. If we find the viewer, update its
// distance from the SHistory's index and continue.
PRBool found = PR_FALSE;
for (PRUint32 j = 0; j < shTransactions.Length(); j++) {
TransactionAndDistance &container = shTransactions[j];
if (container.mViewer == contentViewer) {
container.mDistance = PR_MIN(container.mDistance,
PR_ABS(i - shist->mIndex));
found = PR_TRUE;
break;
PRUint32 entryLastTouched = 0;
if (gOptimizeEviction) {
nsCOMPtr<nsISHEntryInternal> entryInternal = do_QueryInterface(entry);
if (entryInternal) {
// Find when this entry was last activated
entryInternal->GetLastTouched(&entryLastTouched);
}
}
// If we didn't find a TransactionAndDistance for this content viewer, make a new
// one.
if (!found) {
TransactionAndDistance container(trans, PR_ABS(i - shist->mIndex));
shTransactions.AppendElement(container);
#ifdef DEBUG_PAGE_CACHE
nsCOMPtr<nsIURI> uri;
if (ownerEntry) {
ownerEntry->GetURI(getter_AddRefs(uri));
} else {
entry->GetURI(getter_AddRefs(uri));
}
}
nsCAutoString spec;
if (uri) {
uri->GetSpec(spec);
printf("Considering for eviction: %s\n", spec.get());
}
#endif
// This SHEntry has a ContentViewer, so check how far away it is from
// the currently used SHEntry within this SHistory object
if (viewer) {
PRInt32 distance = NS_ABS(shist->mIndex - i);
#ifdef DEBUG_PAGE_CACHE
printf("Has a cached content viewer: %s\n", spec.get());
printf("mIndex: %d i: %d\n", shist->mIndex, i);
#endif
totalContentViewers++;
nsISHTransaction *temp = trans;
temp->GetNext(getter_AddRefs(trans));
// If this entry is further away from focus than any previously found
// or at the same distance but it is longer time since it was activated
// then take this entry as the new candiate for eviction
if (distance > distanceFromFocus || (distance == distanceFromFocus && candidateLastTouched > entryLastTouched)) {
#ifdef DEBUG_PAGE_CACHE
printf("Choosing as new eviction candidate: %s\n", spec.get());
#endif
candidateLastTouched = entryLastTouched;
distanceFromFocus = distance;
evictFromSHE = ownerEntry;
evictViewer = viewer;
}
}
nsISHTransaction* temp = trans;
temp->GetNext(getter_AddRefs(trans));
}
shist = static_cast<nsSHistory*>(PR_NEXT_LINK(shist));
}
// We've found all the transactions belonging to shist which have viewers.
// Add those transactions to our global list and move on.
transactions.AppendElements(shTransactions);
shist = static_cast<nsSHistory*>(PR_NEXT_LINK(shist));
}
#ifdef DEBUG_PAGE_CACHE
printf("Distance from focus: %d\n", distanceFromFocus);
printf("Total max viewers: %d\n", sHistoryMaxTotalViewers);
printf("Total number of viewers: %d\n", totalContentViewers);
#endif
// We now have collected all cached content viewers. First check that we
// have enough that we actually need to evict some.
if ((PRInt32)transactions.Length() <= sHistoryMaxTotalViewers) {
return;
}
if (totalContentViewers > sHistoryMaxTotalViewers && evictViewer) {
#ifdef DEBUG_PAGE_CACHE
nsCOMPtr<nsIURI> uri;
evictFromSHE->GetURI(getter_AddRefs(uri));
nsCAutoString spec;
if (uri) {
uri->GetSpec(spec);
printf("Evicting content viewer: %s\n", spec.get());
}
#endif
// If we need to evict, sort our list of transactions and evict the largest
// ones. (We could of course get better algorithmic complexity here by using
// a heap or something more clever. But sHistoryMaxTotalViewers isn't large,
// so let's not worry about it.)
transactions.Sort();
// Drop the presentation state before destroying the viewer, so that
// document teardown is able to correctly persist the state.
evictFromSHE->SetContentViewer(nsnull);
evictFromSHE->SyncPresentationState();
evictViewer->Destroy();
for (PRInt32 i = transactions.Length() - 1;
i >= sHistoryMaxTotalViewers; --i) {
EvictContentViewerForTransaction(transactions[i].mTransaction);
}
// If we only needed to evict one content viewer, then we are done.
// Otherwise, continue evicting until we reach the max total limit.
if (totalContentViewers - sHistoryMaxTotalViewers == 1) {
shouldTryEviction = PR_FALSE;
}
} else {
// couldn't find a content viewer to evict, so we are done
shouldTryEviction = PR_FALSE;
}
} // while shouldTryEviction
}
nsresult
nsSHistory::EvictExpiredContentViewerForEntry(nsIBFCacheEntry *aEntry)
NS_IMETHODIMP
nsSHistory::EvictExpiredContentViewerForEntry(nsISHEntry *aEntry)
{
PRInt32 startIndex = NS_MAX(0, mIndex - gHistoryMaxViewers);
PRInt32 endIndex = NS_MIN(mLength - 1,
@ -1163,11 +1094,8 @@ nsSHistory::EvictExpiredContentViewerForEntry(nsIBFCacheEntry *aEntry)
for (i = startIndex; trans && i <= endIndex; ++i) {
nsCOMPtr<nsISHEntry> entry;
trans->GetSHEntry(getter_AddRefs(entry));
// Does entry have the same BFCacheEntry as the argument to this method?
if (entry->HasBFCacheEntry(aEntry)) {
if (entry == aEntry)
break;
}
nsISHTransaction *temp = trans;
temp->GetNext(getter_AddRefs(trans));
@ -1175,13 +1103,21 @@ nsSHistory::EvictExpiredContentViewerForEntry(nsIBFCacheEntry *aEntry)
if (i > endIndex)
return NS_OK;
if (i == mIndex) {
NS_WARNING("How did the current SHEntry expire?");
NS_ASSERTION(i != mIndex, "How did the current session entry expire?");
if (i == mIndex)
return NS_OK;
// We evict content viewers for the expired entry and any other entries that
// we would have to go through the expired entry to get to (i.e. the entries
// that have the expired entry between them and the current entry). Those
// other entries should have timed out already, actually, but this is just
// to be on the safe side.
if (i < mIndex) {
EvictContentViewersInRange(startIndex, i + 1);
} else {
EvictContentViewersInRange(i, endIndex + 1);
}
EvictContentViewerForTransaction(trans);
return NS_OK;
}
@ -1192,11 +1128,11 @@ nsSHistory::EvictExpiredContentViewerForEntry(nsIBFCacheEntry *aEntry)
//static
void
nsSHistory::GloballyEvictAllContentViewers()
nsSHistory::EvictAllContentViewersGlobally()
{
PRInt32 maxViewers = sHistoryMaxTotalViewers;
sHistoryMaxTotalViewers = 0;
GloballyEvictContentViewers();
EvictGlobalContentViewer();
sHistoryMaxTotalViewers = maxViewers;
}

11
docshell/shistory/src/nsSHistory.h
View File

@ -101,11 +101,12 @@ protected:
nsresult PrintHistory();
#endif
// Evict content viewers in this window which don't lie in the "safe" range
// around aIndex.
void EvictOutOfRangeWindowContentViewers(PRInt32 aIndex);
static void GloballyEvictContentViewers();
static void GloballyEvictAllContentViewers();
// Evict the viewers at indices between aStartIndex and aEndIndex,
// including aStartIndex but not aEndIndex.
void EvictContentViewersInRange(PRInt32 aStartIndex, PRInt32 aEndIndex);
void EvictWindowContentViewers(PRInt32 aFromIndex, PRInt32 aToIndex);
static void EvictGlobalContentViewer();
static void EvictAllContentViewersGlobally();
// Calculates a max number of total
// content viewers to cache, based on amount of total memory

1
docshell/test/Makefile.in
View File

@ -119,7 +119,6 @@ _TEST_FILES = \
test_bug669671.html \
file_bug669671.sjs \
test_bug675587.html \
test_bfcache_plus_hash.html \
$(NULL)
ifeq ($(MOZ_WIDGET_TOOLKIT),cocoa)

20
docshell/test/chrome/bug396519_window.xul
View File

@ -50,9 +50,6 @@
const LISTEN_EVENTS = ["pageshow"];
const Cc = Components.classes;
const Ci = Components.interfaces;
var gBrowser;
var gTestCount = 0;
var gTestsIterator;
@ -99,23 +96,6 @@
QueryInterface(Components.interfaces.nsISHEntry);
is(!!shEntry.contentViewer, gExpected[i], "content viewer "+i+", test "+gTestCount);
}
// Make sure none of the SHEntries share bfcache entries with one
// another.
for (var i = 0; i < history.count; i++) {
for (var j = 0; j < history.count; j++) {
if (j == i)
continue;
let shentry1 = history.getEntryAtIndex(i, false)
.QueryInterface(Ci.nsISHEntry);
let shentry2 = history.getEntryAtIndex(j, false)
.QueryInterface(Ci.nsISHEntry);
ok(!shentry1.sharesDocumentWith(shentry2),
'Test ' + gTestCount + ': shentry[' + i + "] shouldn't " +
"share document with shentry[" + j + ']');
}
}
}
else {
is(history.count, gExpected.length, "Wrong history length in test "+gTestCount);

121
docshell/test/test_bfcache_plus_hash.html
View File

@ -1,121 +0,0 @@
<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=646641
-->
<head>
<title>Test for Bug 646641</title>
<script type="application/javascript" src="/MochiKit/packed.js"></script>
<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<script type="text/javascript" src="/tests/SimpleTest/WindowSnapshot.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=646641">Mozilla Bug 646641</a>
<p id="display"></p>
<div id="content" style="display: none">
</div>
<pre id="test">
<script type="application/javascript;version=1.7">
/** Test for Bug 646641 **/
/*
* In a popup (because navigating the main frame confuses Mochitest), do the
* following:
*
* * Call history.pushState().
* * Navigate to a new page.
* * Go back two history entries.
*
* Check that we go back, we retrieve the document from bfcache.
*/
SimpleTest.waitForExplicitFinish();
function debug(msg) {
// Wrap dump so we can turn debug messages on and off easily.
dump(msg + '\n');
}
var expectedLoadNum = -1;
function childLoad(n) {
if (n == expectedLoadNum) {
debug('Got load ' + n);
expectedLoadNum = -1;
// Spin the event loop before calling gGen.next() so the generator runs
// outside the onload handler. This prevents us from encountering all
// sorts of docshell quirks.
//
// (I don't know why I need to wrap gGen.next() in a function, but it
// throws an error otherwise.)
setTimeout(function() { gGen.next() }, 0);
}
else {
debug('Got unexpected load ' + n);
ok(false, 'Got unexpected load ' + n);
}
}
var expectedPageshowNum = -1;
function childPageshow(n) {
if (n == expectedPageshowNum) {
debug('Got expected pageshow ' + n);
expectedPageshowNum = -1;
ok(true, 'Got expected pageshow ' + n);
setTimeout(function() { gGen.next() }, 0);
}
else {
debug('Got pageshow ' + n);
}
// Since a pageshow comes along with an onload, don't fail the test if we get
// an unexpected pageshow.
}
function waitForLoad(n) {
debug('Waiting for load ' + n);
expectedLoadNum = n;
}
function waitForShow(n) {
debug('Waiting for show ' + n);
expectedPageshowNum = n;
}
function test() {
var popup = window.open('data:text/html,' +
'<html><body onload="opener.childLoad(1)" ' +
'onpageshow="opener.childPageshow(1)">' +
'Popup 1' +
'</body></html>');
waitForLoad(1);
yield;
popup.history.pushState('', '', '');
popup.location = 'data:text/html,<html><body onload="opener.childLoad(2)">Popup 2</body></html>';
waitForLoad(2);
yield;
// Now go back 2. The first page should be retrieved from bfcache.
popup.history.go(-2);
waitForShow(1);
yield;
popup.close();
SimpleTest.finish();
// Yield once more so we don't throw a StopIteration exception.
yield;
}
var gGen = test();
gGen.next();
</script>
</pre>
</body>
</html>

9
dom/indexedDB/IndexedDatabaseManager.cpp
View File

@ -173,9 +173,12 @@ public:
// First check if the document the IDBDatabase is part of is bfcached
nsCOMPtr<nsIDocument> ownerDoc = database->GetOwnerDocument();
nsIBFCacheEntry* bfCacheEntry;
if (ownerDoc && (bfCacheEntry = ownerDoc->GetBFCacheEntry())) {
bfCacheEntry->RemoveFromBFCacheSync();
nsISHEntry* shEntry;
if (ownerDoc && (shEntry = ownerDoc->GetBFCacheEntry())) {
nsCOMPtr<nsISHEntryInternal> sheInternal = do_QueryInterface(shEntry);
if (sheInternal) {
sheInternal->RemoveFromBFCacheSync();
}
NS_ASSERTION(database->IsClosed(),
"Kicking doc out of bfcache should have closed database");
continue;

2
layout/base/nsDocumentViewer.cpp
View File

@ -1980,7 +1980,7 @@ DocumentViewerImpl::Show(void)
printf("About to evict content viewers: prev=%d, loaded=%d\n",
prevIndex, loadedIndex);
#endif
historyInt->EvictOutOfRangeContentViewers(loadedIndex);
historyInt->EvictContentViewers(prevIndex, loadedIndex);
}
}
}

1
mobile/app/mobile.js
View File

@ -130,6 +130,7 @@ pref("browser.display.remotetabs.timeout", 10);
/* session history */
pref("browser.sessionhistory.max_total_viewers", 1);
pref("browser.sessionhistory.max_entries", 50);
pref("browser.sessionhistory.optimize_eviction", true);
/* session store */
pref("browser.sessionstore.resume_session_once", false);

2
modules/libpref/src/init/all.js
View File

@ -109,6 +109,8 @@ pref("dom.enable_performance", true);
// of content viewers to cache based on the amount of available memory.
pref("browser.sessionhistory.max_total_viewers", -1);
pref("browser.sessionhistory.optimize_eviction", true);
pref("ui.use_native_colors", true);
pref("ui.click_hold_context_menus", false);
pref("browser.display.use_document_fonts", 1); // 0 = never, 1 = quick, 2 = always