no bug - Bumping Firefox l10n changesets r=release a=l10n-bump DONTBUILD
ar -> 98b99511893c
be -> 9addccd24ee6
en-CA -> ad8f5f794e90
es-CL -> c51f2d3897f6
fr -> 248db406dc9f
he -> f0100cf11a34
hsb -> 785a3f38c8e1
id -> eebf16da6583
ka -> 25827f47b791
nb-NO -> b559e54e34ed
pt-BR -> 70e583fef3e2
sq -> ac13cf28abb1
sv-SE -> 20be37e0615c
zh-CN -> 88e115af6deb
zh-TW -> d2080e505bc9
/* -*- 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/. */
/* A namespace class for static layout utilities. */
#include "nsContentUtils.h"
#include <algorithm>
#include <math.h>
#include "DecoderTraits.h"
#include "harfbuzz/hb.h"
#include "imgICache.h"
#include "imgIContainer.h"
#include "imgINotificationObserver.h"
#include "imgLoader.h"
#include "imgRequestProxy.h"
#include "jsapi.h"
#include "jsfriendapi.h"
#include "js/ArrayBuffer.h" // JS::{GetArrayBufferData,IsArrayBufferObject,NewArrayBuffer}
#include "js/JSON.h"
#include "js/RegExp.h" // JS::ExecuteRegExpNoStatics, JS::NewUCRegExpObject, JS::RegExpFlags
#include "js/Value.h"
#include "Layers.h"
#include "nsAppRunner.h"
// nsNPAPIPluginInstance must be included before mozilla/dom/Document.h, which
// is included in mozAutoDocUpdate.h.
#include "nsNPAPIPluginInstance.h"
#include "gfxDrawable.h"
#include "ImageOps.h"
#include "mozAutoDocUpdate.h"
#include "mozilla/AntiTrackingCommon.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/Attributes.h"
#include "mozilla/AutoRestore.h"
#include "mozilla/AutoTimelineMarker.h"
#include "mozilla/BackgroundHangMonitor.h"
#include "mozilla/Base64.h"
#include "mozilla/BasePrincipal.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/Components.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/LoadInfo.h"
#include "mozilla/dom/BlobURLProtocolHandler.h"
#include "mozilla/dom/BrowsingContext.h"
#include "mozilla/dom/BrowsingContextGroup.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/CustomElementRegistry.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/DocumentInlines.h"
#include "mozilla/dom/MessageBroadcaster.h"
#include "mozilla/dom/DocumentFragment.h"
#include "mozilla/dom/DOMException.h"
#include "mozilla/dom/DOMExceptionBinding.h"
#include "mozilla/dom/DOMTypes.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/ElementInlines.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/FileSystemSecurity.h"
#include "mozilla/dom/FileBlobImpl.h"
#include "mozilla/dom/FontTableURIProtocolHandler.h"
#include "mozilla/dom/HTMLInputElement.h"
#include "mozilla/dom/HTMLSlotElement.h"
#include "mozilla/dom/HTMLTemplateElement.h"
#include "mozilla/dom/HTMLTextAreaElement.h"
#include "mozilla/dom/IDTracker.h"
#include "mozilla/dom/MouseEventBinding.h"
#include "mozilla/dom/KeyboardEventBinding.h"
#include "mozilla/dom/IPCBlobUtils.h"
#include "mozilla/dom/NodeBinding.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/BrowserBridgeChild.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/dom/BrowserParent.h"
#include "mozilla/dom/Text.h"
#include "mozilla/dom/TouchEvent.h"
#include "mozilla/dom/ShadowRoot.h"
#include "mozilla/dom/XULCommandEvent.h"
#include "mozilla/dom/UserActivation.h"
#include "mozilla/dom/WorkerCommon.h"
#include "mozilla/dom/WorkerPrivate.h"
#include "mozilla/extensions/WebExtensionPolicy.h"
#include "mozilla/net/CookieSettings.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/EventListenerManager.h"
#include "mozilla/EventStateManager.h"
#include "mozilla/gfx/DataSurfaceHelpers.h"
#include "mozilla/HTMLEditor.h"
#include "mozilla/IMEStateManager.h"
#include "mozilla/InternalMutationEvent.h"
#include "mozilla/Likely.h"
#include "mozilla/ManualNAC.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/Preferences.h"
#include "mozilla/PresShell.h"
#include "mozilla/ResultExtensions.h"
#include "mozilla/dom/Selection.h"
#include "mozilla/Services.h"
#include "mozilla/StaticPrefs_dom.h"
#include "mozilla/StaticPrefs_full_screen_api.h"
#ifdef FUZZING
# include "mozilla/StaticPrefs_fuzzing.h"
#endif
#include "mozilla/StaticPrefs_privacy.h"
#include "mozilla/StaticPrefs_test.h"
#include "mozilla/StaticPrefs_ui.h"
#include "mozilla/TextControlState.h"
#include "mozilla/TextEditor.h"
#include "mozilla/TextEvents.h"
#include "nsArrayUtils.h"
#include "nsAString.h"
#include "nsAttrName.h"
#include "nsAttrValue.h"
#include "nsAttrValueInlines.h"
#include "nsCanvasFrame.h"
#include "nsCaret.h"
#include "nsCCUncollectableMarker.h"
#include "nsCharSeparatedTokenizer.h"
#include "nsCOMPtr.h"
#include "nsContentCreatorFunctions.h"
#include "nsContentDLF.h"
#include "nsContentList.h"
#include "nsContentPolicyUtils.h"
#include "nsContentSecurityManager.h"
#include "nsCRT.h"
#include "nsCycleCollectionParticipant.h"
#include "nsCycleCollector.h"
#include "nsDataHashtable.h"
#include "nsDocShellCID.h"
#include "nsDOMCID.h"
#include "mozilla/dom/DataTransfer.h"
#include "nsDOMJSUtils.h"
#include "nsDOMMutationObserver.h"
#include "nsError.h"
#include "nsFocusManager.h"
#include "nsFrameLoaderOwner.h"
#include "nsGenericHTMLElement.h"
#include "nsGenericHTMLFrameElement.h"
#include "nsGkAtoms.h"
#include "nsHtml5Module.h"
#include "nsHtml5StringParser.h"
#include "nsHTMLDocument.h"
#include "nsHTMLTags.h"
#include "nsIAddonPolicyService.h"
#include "nsIAnonymousContentCreator.h"
#include "nsIAsyncVerifyRedirectCallback.h"
#include "nsICategoryManager.h"
#include "nsIChannelEventSink.h"
#include "nsICharsetDetectionObserver.h"
#include "nsIChromeRegistry.h"
#include "nsIConsoleService.h"
#include "nsIContent.h"
#include "nsIContentInlines.h"
#include "nsIContentSecurityPolicy.h"
#include "nsIContentSink.h"
#include "nsIContentViewer.h"
#include "nsIDocShell.h"
#include "nsIDocShellTreeOwner.h"
#include "mozilla/dom/Document.h"
#include "nsIDocumentEncoder.h"
#include "nsIDOMChromeWindow.h"
#include "nsIDOMWindowUtils.h"
#include "nsIDragService.h"
#include "nsIFormControl.h"
#include "nsIForm.h"
#include "nsIFragmentContentSink.h"
#include "nsContainerFrame.h"
#include "nsIClassifiedChannel.h"
#include "nsIHttpChannelInternal.h"
#include "nsIIdleService.h"
#include "nsIImageLoadingContent.h"
#include "nsIInterfaceRequestor.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIIOService.h"
#include "nsILoadContext.h"
#include "nsILoadGroup.h"
#include "nsIMemoryReporter.h"
#include "nsIMIMEHeaderParam.h"
#include "nsIMIMEService.h"
#include "nsINode.h"
#include "mozilla/dom/NodeInfo.h"
#include "mozilla/NullPrincipal.h"
#include "nsIObjectLoadingContent.h"
#include "nsIObserver.h"
#include "nsIObserverService.h"
#include "nsIOfflineCacheUpdate.h"
#include "nsIParser.h"
#include "nsIParserUtils.h"
#include "nsIPermissionManager.h"
#include "nsIPluginHost.h"
#include "nsIRequest.h"
#include "nsIRunnable.h"
#include "nsIScriptContext.h"
#include "nsIScriptError.h"
#include "nsIScriptGlobalObject.h"
#include "nsIScriptObjectPrincipal.h"
#include "nsIScriptSecurityManager.h"
#include "nsIScrollable.h"
#include "nsIStreamConverter.h"
#include "nsIStreamConverterService.h"
#include "nsIStringBundle.h"
#include "nsIURI.h"
#include "nsIURIMutator.h"
#include "nsIURIWithSpecialOrigin.h"
#include "nsIURL.h"
#include "nsIWebNavigation.h"
#include "nsIWidget.h"
#include "nsIWindowMediator.h"
#include "nsIXPConnect.h"
#include "nsJSUtils.h"
#include "nsMappedAttributes.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsNodeInfoManager.h"
#include "nsParserCIID.h"
#include "nsParserConstants.h"
#include "nsPIDOMWindow.h"
#include "nsPresContext.h"
#include "nsPrintfCString.h"
#include "nsQueryObject.h"
#include "nsSandboxFlags.h"
#include "nsScriptSecurityManager.h"
#include "nsSerializationHelper.h"
#include "nsStreamUtils.h"
#include "nsTextFragment.h"
#include "nsTextNode.h"
#include "nsThreadUtils.h"
#include "nsTreeSanitizer.h"
#include "nsUnicodeProperties.h"
#include "nsURLHelper.h"
#include "nsViewManager.h"
#include "nsViewportInfo.h"
#include "nsWidgetsCID.h"
#include "nsIWindowProvider.h"
#include "nsWrapperCacheInlines.h"
#include "nsXULPopupManager.h"
#include "xpcprivate.h" // nsXPConnect
#include "HTMLSplitOnSpacesTokenizer.h"
#include "InProcessBrowserChildMessageManager.h"
#include "nsContentTypeParser.h"
#include "nsICookiePermission.h"
#include "nsICookieService.h"
#include "ThirdPartyUtil.h"
#include "mozilla/EnumSet.h"
#include "mozilla/BloomFilter.h"
#include "BrowserChild.h"
#include "mozilla/dom/DocGroup.h"
#include "mozilla/dom/TabGroup.h"
#include "nsIWebNavigationInfo.h"
#include "nsPluginHost.h"
#include "nsIBrowser.h"
#include "mozilla/HangAnnotations.h"
#include "mozilla/Encoding.h"
#include "nsXULElement.h"
#include "mozilla/RecordReplay.h"
#include "nsThreadManager.h"
#include "nsIBidiKeyboard.h"
#include "ReferrerInfo.h"
#include "nsAboutProtocolUtils.h"
#if defined(XP_WIN)
// Undefine LoadImage to prevent naming conflict with Windows.
# undef LoadImage
#endif
extern "C" int MOZ_XMLTranslateEntity(const char* ptr, const char* end,
const char** next, char16_t* result);
extern "C" int MOZ_XMLCheckQName(const char* ptr, const char* end, int ns_aware,
const char** colon);
class imgLoader;
class nsAtom;
using namespace mozilla::dom;
using namespace mozilla::ipc;
using namespace mozilla::gfx;
using namespace mozilla::layers;
using namespace mozilla::widget;
using namespace mozilla;
const char kLoadAsData[] = "loadAsData";
nsIXPConnect* nsContentUtils::sXPConnect;
nsIScriptSecurityManager* nsContentUtils::sSecurityManager;
nsIPrincipal* nsContentUtils::sSystemPrincipal;
nsIPrincipal* nsContentUtils::sNullSubjectPrincipal;
nsNameSpaceManager* nsContentUtils::sNameSpaceManager;
nsIIOService* nsContentUtils::sIOService;
nsIUUIDGenerator* nsContentUtils::sUUIDGenerator;
nsIConsoleService* nsContentUtils::sConsoleService;
nsDataHashtable<nsRefPtrHashKey<nsAtom>, EventNameMapping>*
nsContentUtils::sAtomEventTable = nullptr;
nsDataHashtable<nsStringHashKey, EventNameMapping>*
nsContentUtils::sStringEventTable = nullptr;
nsTArray<RefPtr<nsAtom>>* nsContentUtils::sUserDefinedEvents = nullptr;
nsIStringBundleService* nsContentUtils::sStringBundleService;
nsIStringBundle* nsContentUtils::sStringBundles[PropertiesFile_COUNT];
nsIContentPolicy* nsContentUtils::sContentPolicyService;
bool nsContentUtils::sTriedToGetContentPolicy = false;
RefPtr<mozilla::intl::LineBreaker> nsContentUtils::sLineBreaker;
RefPtr<mozilla::intl::WordBreaker> nsContentUtils::sWordBreaker;
StaticRefPtr<nsIBidiKeyboard> nsContentUtils::sBidiKeyboard;
uint32_t nsContentUtils::sScriptBlockerCount = 0;
uint32_t nsContentUtils::sDOMNodeRemovedSuppressCount = 0;
AutoTArray<nsCOMPtr<nsIRunnable>, 8>* nsContentUtils::sBlockedScriptRunners =
nullptr;
uint32_t nsContentUtils::sRunnersCountAtFirstBlocker = 0;
nsIInterfaceRequestor* nsContentUtils::sSameOriginChecker = nullptr;
bool nsContentUtils::sIsHandlingKeyBoardEvent = false;
nsString* nsContentUtils::sShiftText = nullptr;
nsString* nsContentUtils::sControlText = nullptr;
nsString* nsContentUtils::sMetaText = nullptr;
nsString* nsContentUtils::sOSText = nullptr;
nsString* nsContentUtils::sAltText = nullptr;
nsString* nsContentUtils::sModifierSeparator = nullptr;
bool nsContentUtils::sInitialized = false;
#ifndef RELEASE_OR_BETA
bool nsContentUtils::sBypassCSSOMOriginCheck = false;
#endif
nsCString* nsContentUtils::sJSBytecodeMimeType = nullptr;
nsContentUtils::UserInteractionObserver*
nsContentUtils::sUserInteractionObserver = nullptr;
nsHtml5StringParser* nsContentUtils::sHTMLFragmentParser = nullptr;
nsIParser* nsContentUtils::sXMLFragmentParser = nullptr;
nsIFragmentContentSink* nsContentUtils::sXMLFragmentSink = nullptr;
bool nsContentUtils::sFragmentParsingActive = false;
mozilla::LazyLogModule nsContentUtils::sDOMDumpLog("Dump");
int32_t nsContentUtils::sInnerOrOuterWindowCount = 0;
uint32_t nsContentUtils::sInnerOrOuterWindowSerialCounter = 0;
template int32_t nsContentUtils::ComparePoints(
const RangeBoundary& aFirstBoundary, const RangeBoundary& aSecondBoundary,
bool* aDisconnected);
template int32_t nsContentUtils::ComparePoints(
const RangeBoundary& aFirstBoundary,
const RawRangeBoundary& aSecondBoundary, bool* aDisconnected);
template int32_t nsContentUtils::ComparePoints(
const RawRangeBoundary& aFirstBoundary,
const RangeBoundary& aSecondBoundary, bool* aDisconnected);
template int32_t nsContentUtils::ComparePoints(
const RawRangeBoundary& aFirstBoundary,
const RawRangeBoundary& aSecondBoundary, bool* aDisconnected);
// Subset of
// http://www.whatwg.org/specs/web-apps/current-work/#autofill-field-name
enum AutocompleteUnsupportedFieldName : uint8_t {
#define AUTOCOMPLETE_UNSUPPORTED_FIELD_NAME(name_, value_) \
eAutocompleteUnsupportedFieldName_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_UNSUPPORTED_FIELD_NAME
};
enum AutocompleteNoPersistFieldName : uint8_t {
#define AUTOCOMPLETE_NO_PERSIST_FIELD_NAME(name_, value_) \
eAutocompleteNoPersistFieldName_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_NO_PERSIST_FIELD_NAME
};
enum AutocompleteUnsupportFieldContactHint : uint8_t {
#define AUTOCOMPLETE_UNSUPPORTED_FIELD_CONTACT_HINT(name_, value_) \
eAutocompleteUnsupportedFieldContactHint_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_UNSUPPORTED_FIELD_CONTACT_HINT
};
enum AutocompleteFieldName : uint8_t {
#define AUTOCOMPLETE_FIELD_NAME(name_, value_) eAutocompleteFieldName_##name_,
#define AUTOCOMPLETE_CONTACT_FIELD_NAME(name_, value_) \
AUTOCOMPLETE_FIELD_NAME(name_, value_)
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_NAME
#undef AUTOCOMPLETE_CONTACT_FIELD_NAME
};
enum AutocompleteFieldHint : uint8_t {
#define AUTOCOMPLETE_FIELD_HINT(name_, value_) eAutocompleteFieldHint_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_HINT
};
enum AutocompleteFieldContactHint : uint8_t {
#define AUTOCOMPLETE_FIELD_CONTACT_HINT(name_, value_) \
eAutocompleteFieldContactHint_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_CONTACT_HINT
};
enum AutocompleteCategory {
#define AUTOCOMPLETE_CATEGORY(name_, value_) eAutocompleteCategory_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_CATEGORY
};
static const nsAttrValue::EnumTable kAutocompleteUnsupportedFieldNameTable[] = {
#define AUTOCOMPLETE_UNSUPPORTED_FIELD_NAME(name_, value_) \
{value_, eAutocompleteUnsupportedFieldName_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_UNSUPPORTED_FIELD_NAME
{nullptr, 0}};
static const nsAttrValue::EnumTable kAutocompleteNoPersistFieldNameTable[] = {
#define AUTOCOMPLETE_NO_PERSIST_FIELD_NAME(name_, value_) \
{value_, eAutocompleteNoPersistFieldName_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_NO_PERSIST_FIELD_NAME
{nullptr, 0}};
static const nsAttrValue::EnumTable
kAutocompleteUnsupportedContactFieldHintTable[] = {
#define AUTOCOMPLETE_UNSUPPORTED_FIELD_CONTACT_HINT(name_, value_) \
{value_, eAutocompleteUnsupportedFieldContactHint_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_UNSUPPORTED_FIELD_CONTACT_HINT
{nullptr, 0}};
static const nsAttrValue::EnumTable kAutocompleteFieldNameTable[] = {
#define AUTOCOMPLETE_FIELD_NAME(name_, value_) \
{value_, eAutocompleteFieldName_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_NAME
{nullptr, 0}};
static const nsAttrValue::EnumTable kAutocompleteContactFieldNameTable[] = {
#define AUTOCOMPLETE_CONTACT_FIELD_NAME(name_, value_) \
{value_, eAutocompleteFieldName_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_CONTACT_FIELD_NAME
{nullptr, 0}};
static const nsAttrValue::EnumTable kAutocompleteFieldHintTable[] = {
#define AUTOCOMPLETE_FIELD_HINT(name_, value_) \
{value_, eAutocompleteFieldHint_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_HINT
{nullptr, 0}};
static const nsAttrValue::EnumTable kAutocompleteContactFieldHintTable[] = {
#define AUTOCOMPLETE_FIELD_CONTACT_HINT(name_, value_) \
{value_, eAutocompleteFieldContactHint_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_CONTACT_HINT
{nullptr, 0}};
namespace {
static NS_DEFINE_CID(kCParserCID, NS_PARSER_CID);
static PLDHashTable* sEventListenerManagersHash;
class DOMEventListenerManagersHashReporter final : public nsIMemoryReporter {
MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf)
~DOMEventListenerManagersHashReporter() = default;
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override {
// We don't measure the |EventListenerManager| objects pointed to by the
// entries because those references are non-owning.
int64_t amount =
sEventListenerManagersHash
? sEventListenerManagersHash->ShallowSizeOfIncludingThis(
MallocSizeOf)
: 0;
MOZ_COLLECT_REPORT(
"explicit/dom/event-listener-managers-hash", KIND_HEAP, UNITS_BYTES,
amount, "Memory used by the event listener manager's hash table.");
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(DOMEventListenerManagersHashReporter, nsIMemoryReporter)
class EventListenerManagerMapEntry : public PLDHashEntryHdr {
public:
explicit EventListenerManagerMapEntry(const void* aKey) : mKey(aKey) {}
~EventListenerManagerMapEntry() {
NS_ASSERTION(!mListenerManager, "caller must release and disconnect ELM");
}
protected: // declared protected to silence clang warnings
const void* mKey; // must be first, to look like PLDHashEntryStub
public:
RefPtr<EventListenerManager> mListenerManager;
};
static void EventListenerManagerHashInitEntry(PLDHashEntryHdr* entry,
const void* key) {
// Initialize the entry with placement new
new (entry) EventListenerManagerMapEntry(key);
}
static void EventListenerManagerHashClearEntry(PLDHashTable* table,
PLDHashEntryHdr* entry) {
EventListenerManagerMapEntry* lm =
static_cast<EventListenerManagerMapEntry*>(entry);
// Let the EventListenerManagerMapEntry clean itself up...
lm->~EventListenerManagerMapEntry();
}
class SameOriginCheckerImpl final : public nsIChannelEventSink,
public nsIInterfaceRequestor {
~SameOriginCheckerImpl() = default;
NS_DECL_ISUPPORTS
NS_DECL_NSICHANNELEVENTSINK
NS_DECL_NSIINTERFACEREQUESTOR
};
} // namespace
/**
* This class is used to determine whether or not the user is currently
* interacting with the browser. It listens to observer events to toggle the
* value of the sUserActive static.
*
* This class is an internal implementation detail.
* nsContentUtils::GetUserIsInteracting() should be used to access current
* user interaction status.
*/
class nsContentUtils::UserInteractionObserver final
: public nsIObserver,
public BackgroundHangAnnotator {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
void Init();
void Shutdown();
void AnnotateHang(BackgroundHangAnnotations& aAnnotations) override;
static Atomic<bool> sUserActive;
private:
~UserInteractionObserver() {}
};
// static
nsresult nsContentUtils::Init() {
if (sInitialized) {
NS_WARNING("Init() called twice");
return NS_OK;
}
nsHTMLTags::AddRefTable();
sNameSpaceManager = nsNameSpaceManager::GetInstance();
NS_ENSURE_TRUE(sNameSpaceManager, NS_ERROR_OUT_OF_MEMORY);
sXPConnect = nsXPConnect::XPConnect();
// We hold a strong ref to sXPConnect to ensure that it does not go away until
// nsLayoutStatics::Shutdown is happening. Otherwise ~nsXPConnect can be
// triggered by xpcModuleDtor late in shutdown and cause crashes due to
// various stuff already being torn down by then. Note that this means that
// we are effectively making sure that if we leak nsLayoutStatics then we also
// leak nsXPConnect.
NS_ADDREF(sXPConnect);
sSecurityManager = nsScriptSecurityManager::GetScriptSecurityManager();
if (!sSecurityManager) return NS_ERROR_FAILURE;
NS_ADDREF(sSecurityManager);
sSecurityManager->GetSystemPrincipal(&sSystemPrincipal);
MOZ_ASSERT(sSystemPrincipal);
RefPtr<NullPrincipal> nullPrincipal =
NullPrincipal::CreateWithoutOriginAttributes();
if (!nullPrincipal) {
return NS_ERROR_FAILURE;
}
nullPrincipal.forget(&sNullSubjectPrincipal);
nsresult rv = CallGetService(NS_IOSERVICE_CONTRACTID, &sIOService);
if (NS_FAILED(rv)) {
// This makes life easier, but we can live without it.
sIOService = nullptr;
}
sLineBreaker = mozilla::intl::LineBreaker::Create();
sWordBreaker = mozilla::intl::WordBreaker::Create();
if (!InitializeEventTable()) return NS_ERROR_FAILURE;
if (!sEventListenerManagersHash) {
static const PLDHashTableOps hash_table_ops = {
PLDHashTable::HashVoidPtrKeyStub, PLDHashTable::MatchEntryStub,
PLDHashTable::MoveEntryStub, EventListenerManagerHashClearEntry,
EventListenerManagerHashInitEntry};
sEventListenerManagersHash =
new PLDHashTable(&hash_table_ops, sizeof(EventListenerManagerMapEntry));
RegisterStrongMemoryReporter(new DOMEventListenerManagersHashReporter());
}
sBlockedScriptRunners = new AutoTArray<nsCOMPtr<nsIRunnable>, 8>;
#ifndef RELEASE_OR_BETA
sBypassCSSOMOriginCheck = getenv("MOZ_BYPASS_CSSOM_ORIGIN_CHECK");
#endif
nsDependentCString buildID(mozilla::PlatformBuildID());
sJSBytecodeMimeType =
new nsCString(NS_LITERAL_CSTRING("javascript/moz-bytecode-") + buildID);
Element::InitCCCallbacks();
Unused << nsRFPService::GetOrCreate();
nsCOMPtr<nsIUUIDGenerator> uuidGenerator =
do_GetService("@mozilla.org/uuid-generator;1", &rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
uuidGenerator.forget(&sUUIDGenerator);
if (XRE_IsParentProcess()) {
AsyncPrecreateStringBundles();
}
RefPtr<UserInteractionObserver> uio = new UserInteractionObserver();
uio->Init();
uio.forget(&sUserInteractionObserver);
sInitialized = true;
return NS_OK;
}
void nsContentUtils::GetShiftText(nsAString& text) {
if (!sShiftText) InitializeModifierStrings();
text.Assign(*sShiftText);
}
void nsContentUtils::GetControlText(nsAString& text) {
if (!sControlText) InitializeModifierStrings();
text.Assign(*sControlText);
}
void nsContentUtils::GetMetaText(nsAString& text) {
if (!sMetaText) InitializeModifierStrings();
text.Assign(*sMetaText);
}
void nsContentUtils::GetOSText(nsAString& text) {
if (!sOSText) {
InitializeModifierStrings();
}
text.Assign(*sOSText);
}
void nsContentUtils::GetAltText(nsAString& text) {
if (!sAltText) InitializeModifierStrings();
text.Assign(*sAltText);
}
void nsContentUtils::GetModifierSeparatorText(nsAString& text) {
if (!sModifierSeparator) InitializeModifierStrings();
text.Assign(*sModifierSeparator);
}
void nsContentUtils::InitializeModifierStrings() {
// load the display strings for the keyboard accelerators
nsCOMPtr<nsIStringBundleService> bundleService =
mozilla::services::GetStringBundleService();
nsCOMPtr<nsIStringBundle> bundle;
DebugOnly<nsresult> rv = NS_OK;
if (bundleService) {
rv = bundleService->CreateBundle(
"chrome://global-platform/locale/platformKeys.properties",
getter_AddRefs(bundle));
}
NS_ASSERTION(
NS_SUCCEEDED(rv) && bundle,
"chrome://global/locale/platformKeys.properties could not be loaded");
nsAutoString shiftModifier;
nsAutoString metaModifier;
nsAutoString osModifier;
nsAutoString altModifier;
nsAutoString controlModifier;
nsAutoString modifierSeparator;
if (bundle) {
// macs use symbols for each modifier key, so fetch each from the bundle,
// which also covers i18n
bundle->GetStringFromName("VK_SHIFT", shiftModifier);
bundle->GetStringFromName("VK_META", metaModifier);
bundle->GetStringFromName("VK_WIN", osModifier);
bundle->GetStringFromName("VK_ALT", altModifier);
bundle->GetStringFromName("VK_CONTROL", controlModifier);
bundle->GetStringFromName("MODIFIER_SEPARATOR", modifierSeparator);
}
// if any of these don't exist, we get an empty string
sShiftText = new nsString(shiftModifier);
sMetaText = new nsString(metaModifier);
sOSText = new nsString(osModifier);
sAltText = new nsString(altModifier);
sControlText = new nsString(controlModifier);
sModifierSeparator = new nsString(modifierSeparator);
}
mozilla::EventClassID nsContentUtils::GetEventClassIDFromMessage(
EventMessage aEventMessage) {
switch (aEventMessage) {
#define MESSAGE_TO_EVENT(name_, message_, type_, struct_) \
case message_: \
return struct_;
#include "mozilla/EventNameList.h"
#undef MESSAGE_TO_EVENT
default:
MOZ_ASSERT_UNREACHABLE("Invalid event message?");
return eBasicEventClass;
}
}
static nsAtom* GetEventTypeFromMessage(EventMessage aEventMessage) {
switch (aEventMessage) {
#define MESSAGE_TO_EVENT(name_, message_, type_, struct_) \
case message_: \
return nsGkAtoms::on##name_;
#include "mozilla/EventNameList.h"
#undef MESSAGE_TO_EVENT
default:
return nullptr;
}
}
// Because of SVG/SMIL we have several atoms mapped to the same
// id, but we can rely on MESSAGE_TO_EVENT to map id to only one atom.
static bool ShouldAddEventToStringEventTable(const EventNameMapping& aMapping) {
MOZ_ASSERT(aMapping.mAtom);
return GetEventTypeFromMessage(aMapping.mMessage) == aMapping.mAtom;
}
bool nsContentUtils::InitializeEventTable() {
NS_ASSERTION(!sAtomEventTable, "EventTable already initialized!");
NS_ASSERTION(!sStringEventTable, "EventTable already initialized!");
static const EventNameMapping eventArray[] = {
#define EVENT(name_, _message, _type, _class) \
{nsGkAtoms::on##name_, _type, _message, _class, false},
#define WINDOW_ONLY_EVENT EVENT
#define DOCUMENT_ONLY_EVENT EVENT
#define NON_IDL_EVENT EVENT
#include "mozilla/EventNameList.h"
#undef WINDOW_ONLY_EVENT
#undef NON_IDL_EVENT
#undef EVENT
{nullptr}};
sAtomEventTable =
new nsDataHashtable<nsRefPtrHashKey<nsAtom>, EventNameMapping>(
ArrayLength(eventArray));
sStringEventTable = new nsDataHashtable<nsStringHashKey, EventNameMapping>(
ArrayLength(eventArray));
sUserDefinedEvents = new nsTArray<RefPtr<nsAtom>>(64);
// Subtract one from the length because of the trailing null
for (uint32_t i = 0; i < ArrayLength(eventArray) - 1; ++i) {
MOZ_ASSERT(!sAtomEventTable->Lookup(eventArray[i].mAtom),
"Double-defining event name; fix your EventNameList.h");
sAtomEventTable->Put(eventArray[i].mAtom, eventArray[i]);
if (ShouldAddEventToStringEventTable(eventArray[i])) {
sStringEventTable->Put(
Substring(nsDependentAtomString(eventArray[i].mAtom), 2),
eventArray[i]);
}
}
return true;
}
void nsContentUtils::InitializeTouchEventTable() {
static bool sEventTableInitialized = false;
if (!sEventTableInitialized && sAtomEventTable && sStringEventTable) {
sEventTableInitialized = true;
static const EventNameMapping touchEventArray[] = {
#define EVENT(name_, _message, _type, _class)
#define TOUCH_EVENT(name_, _message, _type, _class) \
{nsGkAtoms::on##name_, _type, _message, _class},
#include "mozilla/EventNameList.h"
#undef TOUCH_EVENT
#undef EVENT
{nullptr}};
// Subtract one from the length because of the trailing null
for (uint32_t i = 0; i < ArrayLength(touchEventArray) - 1; ++i) {
sAtomEventTable->Put(touchEventArray[i].mAtom, touchEventArray[i]);
sStringEventTable->Put(
Substring(nsDependentAtomString(touchEventArray[i].mAtom), 2),
touchEventArray[i]);
}
}
}
static bool Is8bit(const nsAString& aString) {
static const char16_t EIGHT_BIT = char16_t(~0x00FF);
for (nsAString::const_char_iterator start = aString.BeginReading(),
end = aString.EndReading();
start != end; ++start) {
if (*start & EIGHT_BIT) {
return false;
}
}
return true;
}
nsresult nsContentUtils::Btoa(const nsAString& aBinaryData,
nsAString& aAsciiBase64String) {
if (!Is8bit(aBinaryData)) {
aAsciiBase64String.Truncate();
return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
}
return Base64Encode(aBinaryData, aAsciiBase64String);
}
nsresult nsContentUtils::Atob(const nsAString& aAsciiBase64String,
nsAString& aBinaryData) {
if (!Is8bit(aAsciiBase64String)) {
aBinaryData.Truncate();
return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
}
const char16_t* start = aAsciiBase64String.BeginReading();
const char16_t* cur = start;
const char16_t* end = aAsciiBase64String.EndReading();
bool hasWhitespace = false;
while (cur < end) {
if (nsContentUtils::IsHTMLWhitespace(*cur)) {
hasWhitespace = true;
break;
}
cur++;
}
nsresult rv;
if (hasWhitespace) {
nsString trimmedString;
if (!trimmedString.SetCapacity(aAsciiBase64String.Length(), fallible)) {
return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
}
trimmedString.Append(start, cur - start);
while (cur < end) {
if (!nsContentUtils::IsHTMLWhitespace(*cur)) {
trimmedString.Append(*cur);
}
cur++;
}
rv = Base64Decode(trimmedString, aBinaryData);
} else {
rv = Base64Decode(aAsciiBase64String, aBinaryData);
}
if (NS_FAILED(rv) && rv == NS_ERROR_INVALID_ARG) {
return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
}
return rv;
}
bool nsContentUtils::IsAutocompleteEnabled(
mozilla::dom::HTMLInputElement* aInput) {
MOZ_ASSERT(aInput, "aInput should not be null!");
nsAutoString autocomplete;
aInput->GetAutocomplete(autocomplete);
if (autocomplete.IsEmpty()) {
auto* form = aInput->GetForm();
if (!form) {
return true;
}
form->GetAutocomplete(autocomplete);
}
return !autocomplete.EqualsLiteral("off");
}
nsContentUtils::AutocompleteAttrState
nsContentUtils::SerializeAutocompleteAttribute(
const nsAttrValue* aAttr, nsAString& aResult,
AutocompleteAttrState aCachedState) {
if (!aAttr ||
aCachedState == nsContentUtils::eAutocompleteAttrState_Invalid) {
return aCachedState;
}
if (aCachedState == nsContentUtils::eAutocompleteAttrState_Valid) {
uint32_t atomCount = aAttr->GetAtomCount();
for (uint32_t i = 0; i < atomCount; i++) {
if (i != 0) {
aResult.Append(' ');
}
aResult.Append(nsDependentAtomString(aAttr->AtomAt(i)));
}
nsContentUtils::ASCIIToLower(aResult);
return aCachedState;
}
aResult.Truncate();
mozilla::dom::AutocompleteInfo info;
AutocompleteAttrState state =
InternalSerializeAutocompleteAttribute(aAttr, info);
if (state == eAutocompleteAttrState_Valid) {
// Concatenate the info fields.
aResult = info.mSection;
if (!info.mAddressType.IsEmpty()) {
if (!aResult.IsEmpty()) {
aResult += ' ';
}
aResult += info.mAddressType;
}
if (!info.mContactType.IsEmpty()) {
if (!aResult.IsEmpty()) {
aResult += ' ';
}
aResult += info.mContactType;
}
if (!info.mFieldName.IsEmpty()) {
if (!aResult.IsEmpty()) {
aResult += ' ';
}
aResult += info.mFieldName;
}
}
return state;
}
nsContentUtils::AutocompleteAttrState
nsContentUtils::SerializeAutocompleteAttribute(
const nsAttrValue* aAttr, mozilla::dom::AutocompleteInfo& aInfo,
AutocompleteAttrState aCachedState, bool aGrantAllValidValue) {
if (!aAttr ||
aCachedState == nsContentUtils::eAutocompleteAttrState_Invalid) {
return aCachedState;
}
return InternalSerializeAutocompleteAttribute(aAttr, aInfo,
aGrantAllValidValue);
}
/**
* Helper to validate the @autocomplete tokens.
*
* @return {AutocompleteAttrState} The state of the attribute (invalid/valid).
*/
nsContentUtils::AutocompleteAttrState
nsContentUtils::InternalSerializeAutocompleteAttribute(
const nsAttrValue* aAttrVal, mozilla::dom::AutocompleteInfo& aInfo,
bool aGrantAllValidValue) {
// No autocomplete attribute so we are done
if (!aAttrVal) {
return eAutocompleteAttrState_Invalid;
}
uint32_t numTokens = aAttrVal->GetAtomCount();
if (!numTokens) {
return eAutocompleteAttrState_Invalid;
}
uint32_t index = numTokens - 1;
nsString tokenString = nsDependentAtomString(aAttrVal->AtomAt(index));
AutocompleteCategory category;
nsAttrValue enumValue;
bool unsupported = false;
if (!aGrantAllValidValue) {
unsupported = enumValue.ParseEnumValue(
tokenString, kAutocompleteUnsupportedFieldNameTable, false);
if (unsupported) {
return eAutocompleteAttrState_Invalid;
}
}
nsAutoString str;
bool result =
enumValue.ParseEnumValue(tokenString, kAutocompleteFieldNameTable, false);
if (result) {
// Off/Automatic/Normal categories.
if (enumValue.Equals(NS_LITERAL_STRING("off"), eIgnoreCase) ||
enumValue.Equals(NS_LITERAL_STRING("on"), eIgnoreCase)) {
if (numTokens > 1) {
return eAutocompleteAttrState_Invalid;
}
enumValue.ToString(str);
ASCIIToLower(str);
aInfo.mFieldName.Assign(str);
aInfo.mCanAutomaticallyPersist =
!enumValue.Equals(NS_LITERAL_STRING("off"), eIgnoreCase);
return eAutocompleteAttrState_Valid;
}
// Only allow on/off if form autofill @autocomplete values aren't enabled
// and it doesn't grant all valid values.
if (!StaticPrefs::dom_forms_autocomplete_formautofill() &&
!aGrantAllValidValue) {
return eAutocompleteAttrState_Invalid;
}
// Normal category
if (numTokens > 3) {
return eAutocompleteAttrState_Invalid;
}
category = eAutocompleteCategory_NORMAL;
} else { // Check if the last token is of the contact category instead.
// Only allow on/off if form autofill @autocomplete values aren't enabled
// and it doesn't grant all valid values.
if (!StaticPrefs::dom_forms_autocomplete_formautofill() &&
!aGrantAllValidValue) {
return eAutocompleteAttrState_Invalid;
}
result = enumValue.ParseEnumValue(
tokenString, kAutocompleteContactFieldNameTable, false);
if (!result || numTokens > 4) {
return eAutocompleteAttrState_Invalid;
}
category = eAutocompleteCategory_CONTACT;
}
enumValue.ToString(str);
ASCIIToLower(str);
aInfo.mFieldName.Assign(str);
aInfo.mCanAutomaticallyPersist = !enumValue.ParseEnumValue(
tokenString, kAutocompleteNoPersistFieldNameTable, false);
// We are done if this was the only token.
if (numTokens == 1) {
return eAutocompleteAttrState_Valid;
}
--index;
tokenString = nsDependentAtomString(aAttrVal->AtomAt(index));
if (category == eAutocompleteCategory_CONTACT) {
if (!aGrantAllValidValue) {
unsupported = enumValue.ParseEnumValue(
tokenString, kAutocompleteUnsupportedContactFieldHintTable, false);
if (unsupported) {
return eAutocompleteAttrState_Invalid;
}
}
nsAttrValue contactFieldHint;
result = contactFieldHint.ParseEnumValue(
tokenString, kAutocompleteContactFieldHintTable, false);
if (result) {
nsAutoString contactFieldHintString;
contactFieldHint.ToString(contactFieldHintString);
ASCIIToLower(contactFieldHintString);
aInfo.mContactType.Assign(contactFieldHintString);
if (index == 0) {
return eAutocompleteAttrState_Valid;
}
--index;
tokenString = nsDependentAtomString(aAttrVal->AtomAt(index));
}
}
// Check for billing/shipping tokens
nsAttrValue fieldHint;
if (fieldHint.ParseEnumValue(tokenString, kAutocompleteFieldHintTable,
false)) {
nsString fieldHintString;
fieldHint.ToString(fieldHintString);
ASCIIToLower(fieldHintString);
aInfo.mAddressType.Assign(fieldHintString);
if (index == 0) {
return eAutocompleteAttrState_Valid;
}
--index;
tokenString = nsDependentAtomString(aAttrVal->AtomAt(index));
}
// Check for section-* token
const nsDependentSubstring& section = Substring(tokenString, 0, 8);
if (section.LowerCaseEqualsASCII("section-")) {
ASCIIToLower(tokenString);
aInfo.mSection.Assign(tokenString);
if (index == 0) {
return eAutocompleteAttrState_Valid;
}
}
// Clear the fields as the autocomplete attribute is invalid.
aInfo.mSection.Truncate();
aInfo.mAddressType.Truncate();
aInfo.mContactType.Truncate();
aInfo.mFieldName.Truncate();
return eAutocompleteAttrState_Invalid;
}
// Parse an integer according to HTML spec
int32_t nsContentUtils::ParseHTMLInteger(const nsAString& aValue,
ParseHTMLIntegerResultFlags* aResult) {
int result = eParseHTMLInteger_NoFlags;
nsAString::const_iterator iter, end;
aValue.BeginReading(iter);
aValue.EndReading(end);
while (iter != end && nsContentUtils::IsHTMLWhitespace(*iter)) {
result |= eParseHTMLInteger_NonStandard;
++iter;
}
if (iter == end) {
result |= eParseHTMLInteger_Error | eParseHTMLInteger_ErrorNoValue;
*aResult = (ParseHTMLIntegerResultFlags)result;
return 0;
}
int sign = 1;
if (*iter == char16_t('-')) {
sign = -1;
result |= eParseHTMLInteger_Negative;
++iter;
} else if (*iter == char16_t('+')) {
result |= eParseHTMLInteger_NonStandard;
++iter;
}
bool foundValue = false;
CheckedInt32 value = 0;
// Check for leading zeros first.
uint64_t leadingZeros = 0;
while (iter != end) {
if (*iter != char16_t('0')) {
break;
}
++leadingZeros;
foundValue = true;
++iter;
}
while (iter != end) {
if (*iter >= char16_t('0') && *iter <= char16_t('9')) {
value = (value * 10) + (*iter - char16_t('0')) * sign;
++iter;
if (!value.isValid()) {
result |= eParseHTMLInteger_Error | eParseHTMLInteger_ErrorOverflow;
break;
}
foundValue = true;
} else {
break;
}
}
if (!foundValue) {
result |= eParseHTMLInteger_Error | eParseHTMLInteger_ErrorNoValue;
}
if (value.isValid() &&
((leadingZeros > 1 || (leadingZeros == 1 && !(value == 0))) ||
(sign == -1 && value == 0))) {
result |= eParseHTMLInteger_NonStandard;
}
if (iter != end) {
result |= eParseHTMLInteger_DidNotConsumeAllInput;
}
*aResult = (ParseHTMLIntegerResultFlags)result;
return value.isValid() ? value.value() : 0;
}
#define SKIP_WHITESPACE(iter, end_iter, end_res) \
while ((iter) != (end_iter) && nsCRT::IsAsciiSpace(*(iter))) { \
++(iter); \
} \
if ((iter) == (end_iter)) { \
return (end_res); \
}
#define SKIP_ATTR_NAME(iter, end_iter) \
while ((iter) != (end_iter) && !nsCRT::IsAsciiSpace(*(iter)) && \
*(iter) != '=') { \
++(iter); \
}
bool nsContentUtils::GetPseudoAttributeValue(const nsString& aSource,
nsAtom* aName, nsAString& aValue) {
aValue.Truncate();
const char16_t* start = aSource.get();
const char16_t* end = start + aSource.Length();
const char16_t* iter;
while (start != end) {
SKIP_WHITESPACE(start, end, false)
iter = start;
SKIP_ATTR_NAME(iter, end)
if (start == iter) {
return false;
}
// Remember the attr name.
const nsDependentSubstring& attrName = Substring(start, iter);
// Now check whether this is a valid name="value" pair.
start = iter;
SKIP_WHITESPACE(start, end, false)
if (*start != '=') {
// No '=', so this is not a name="value" pair. We don't know
// what it is, and we have no way to handle it.
return false;
}
// Have to skip the value.
++start;
SKIP_WHITESPACE(start, end, false)
char16_t q = *start;
if (q != kQuote && q != kApostrophe) {
// Not a valid quoted value, so bail.
return false;
}
++start; // Point to the first char of the value.
iter = start;
while (iter != end && *iter != q) {
++iter;
}
if (iter == end) {
// Oops, unterminated quoted string.
return false;
}
// At this point attrName holds the name of the "attribute" and
// the value is between start and iter.
if (aName->Equals(attrName)) {
// We'll accumulate as many characters as possible (until we hit either
// the end of the string or the beginning of an entity). Chunks will be
// delimited by start and chunkEnd.
const char16_t* chunkEnd = start;
while (chunkEnd != iter) {
if (*chunkEnd == kLessThan) {
aValue.Truncate();
return false;
}
if (*chunkEnd == kAmpersand) {
aValue.Append(start, chunkEnd - start);
const char16_t* afterEntity = nullptr;
char16_t result[2];
uint32_t count = MOZ_XMLTranslateEntity(
reinterpret_cast<const char*>(chunkEnd),
reinterpret_cast<const char*>(iter),
reinterpret_cast<const char**>(&afterEntity), result);
if (count == 0) {
aValue.Truncate();
return false;
}
aValue.Append(result, count);
// Advance to after the entity and begin a new chunk.
start = chunkEnd = afterEntity;
} else {
++chunkEnd;
}
}
// Append remainder.
aValue.Append(start, iter - start);
return true;
}
// Resume scanning after the end of the attribute value (past the quote
// char).
start = iter + 1;
}
return false;
}
bool nsContentUtils::IsJavaScriptLanguage(const nsString& aName) {
return aName.LowerCaseEqualsLiteral("javascript") ||
aName.LowerCaseEqualsLiteral("livescript") ||
aName.LowerCaseEqualsLiteral("mocha") ||
aName.LowerCaseEqualsLiteral("javascript1.0") ||
aName.LowerCaseEqualsLiteral("javascript1.1") ||
aName.LowerCaseEqualsLiteral("javascript1.2") ||
aName.LowerCaseEqualsLiteral("javascript1.3") ||
aName.LowerCaseEqualsLiteral("javascript1.4") ||
aName.LowerCaseEqualsLiteral("javascript1.5");
}
void nsContentUtils::SplitMimeType(const nsAString& aValue, nsString& aType,
nsString& aParams) {
aType.Truncate();
aParams.Truncate();
int32_t semiIndex = aValue.FindChar(char16_t(';'));
if (-1 != semiIndex) {
aType = Substring(aValue, 0, semiIndex);
aParams =
Substring(aValue, semiIndex + 1, aValue.Length() - (semiIndex + 1));
aParams.StripWhitespace();
} else {
aType = aValue;
}
aType.StripWhitespace();
}
nsresult nsContentUtils::IsUserIdle(uint32_t aRequestedIdleTimeInMS,
bool* aUserIsIdle) {
nsresult rv;
nsCOMPtr<nsIIdleService> idleService =
do_GetService("@mozilla.org/widget/idleservice;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t idleTimeInMS;
rv = idleService->GetIdleTime(&idleTimeInMS);
NS_ENSURE_SUCCESS(rv, rv);
*aUserIsIdle = idleTimeInMS >= aRequestedIdleTimeInMS;
return NS_OK;
}
/**
* A helper function that parses a sandbox attribute (of an <iframe> or a CSP
* directive) and converts it to the set of flags used internally.
*
* @param aSandboxAttr the sandbox attribute
* @return the set of flags (SANDBOXED_NONE if aSandboxAttr is
* null)
*/
uint32_t nsContentUtils::ParseSandboxAttributeToFlags(
const nsAttrValue* aSandboxAttr) {
if (!aSandboxAttr) {
return SANDBOXED_NONE;
}
uint32_t out = SANDBOX_ALL_FLAGS;
#define SANDBOX_KEYWORD(string, atom, flags) \
if (aSandboxAttr->Contains(nsGkAtoms::atom, eIgnoreCase)) { \
out &= ~(flags); \
}
#include "IframeSandboxKeywordList.h"
#undef SANDBOX_KEYWORD
return out;
}
/**
* A helper function that checks if a string matches a valid sandbox flag.
*
* @param aFlag the potential sandbox flag.
* @return true if the flag is a sandbox flag.
*/
bool nsContentUtils::IsValidSandboxFlag(const nsAString& aFlag) {
#define SANDBOX_KEYWORD(string, atom, flags) \
if (EqualsIgnoreASCIICase(nsDependentAtomString(nsGkAtoms::atom), aFlag)) { \
return true; \
}
#include "IframeSandboxKeywordList.h"
#undef SANDBOX_KEYWORD
return false;
}
/**
* A helper function that returns a string attribute corresponding to the
* sandbox flags.
*
* @param aFlags the sandbox flags
* @param aString the attribute corresponding to the flags (null if aFlags
* is zero)
*/
void nsContentUtils::SandboxFlagsToString(uint32_t aFlags, nsAString& aString) {
if (!aFlags) {
SetDOMStringToNull(aString);
return;
}
aString.Truncate();
#define SANDBOX_KEYWORD(string, atom, flags) \
if (!(aFlags & (flags))) { \
if (!aString.IsEmpty()) { \
aString.AppendLiteral(u" "); \
} \
aString.Append(nsDependentAtomString(nsGkAtoms::atom)); \
}
#include "IframeSandboxKeywordList.h"
#undef SANDBOX_KEYWORD
}
nsIBidiKeyboard* nsContentUtils::GetBidiKeyboard() {
if (!sBidiKeyboard) {
sBidiKeyboard = nsIWidget::CreateBidiKeyboard();
}
return sBidiKeyboard;
}
/**
* This is used to determine whether a character is in one of the classes
* which CSS says should be part of the first-letter. Currently, that is
* all punctuation classes (P*). Note that this is a change from CSS2
* which excluded Pc and Pd.
*
* https://www.w3.org/TR/css-pseudo-4/#first-letter-pseudo
* "Punctuation (i.e, characters that belong to the Punctuation (P*) Unicode
* general category [UAX44]) [...]"
*/
// static
bool nsContentUtils::IsFirstLetterPunctuation(uint32_t aChar) {
switch (mozilla::unicode::GetGeneralCategory(aChar)) {
case HB_UNICODE_GENERAL_CATEGORY_CONNECT_PUNCTUATION: /* Pc */
case HB_UNICODE_GENERAL_CATEGORY_DASH_PUNCTUATION: /* Pd */
case HB_UNICODE_GENERAL_CATEGORY_CLOSE_PUNCTUATION: /* Pe */
case HB_UNICODE_GENERAL_CATEGORY_FINAL_PUNCTUATION: /* Pf */
case HB_UNICODE_GENERAL_CATEGORY_INITIAL_PUNCTUATION: /* Pi */
case HB_UNICODE_GENERAL_CATEGORY_OTHER_PUNCTUATION: /* Po */
case HB_UNICODE_GENERAL_CATEGORY_OPEN_PUNCTUATION: /* Ps */
return true;
default:
return false;
}
}
// static
bool nsContentUtils::IsAlphanumeric(uint32_t aChar) {
nsUGenCategory cat = mozilla::unicode::GetGenCategory(aChar);
return (cat == nsUGenCategory::kLetter || cat == nsUGenCategory::kNumber);
}
// static
bool nsContentUtils::IsAlphanumericAt(const nsTextFragment* aFrag,
uint32_t aOffset) {
char16_t h = aFrag->CharAt(aOffset);
if (!IS_SURROGATE(h)) {
return IsAlphanumeric(h);
}
if (NS_IS_HIGH_SURROGATE(h) && aOffset + 1 < aFrag->GetLength()) {
char16_t l = aFrag->CharAt(aOffset + 1);
if (NS_IS_LOW_SURROGATE(l)) {
return IsAlphanumeric(SURROGATE_TO_UCS4(h, l));
}
}
return false;
}
/* static */
bool nsContentUtils::IsHTMLWhitespace(char16_t aChar) {
return aChar == char16_t(0x0009) || aChar == char16_t(0x000A) ||
aChar == char16_t(0x000C) || aChar == char16_t(0x000D) ||
aChar == char16_t(0x0020);
}
/* static */
bool nsContentUtils::IsHTMLWhitespaceOrNBSP(char16_t aChar) {
return IsHTMLWhitespace(aChar) || aChar == char16_t(0xA0);
}
/* static */
bool nsContentUtils::IsHTMLBlockLevelElement(nsIContent* aContent) {
return aContent->IsAnyOfHTMLElements(
nsGkAtoms::address, nsGkAtoms::article, nsGkAtoms::aside,
nsGkAtoms::blockquote, nsGkAtoms::center, nsGkAtoms::dir, nsGkAtoms::div,
nsGkAtoms::dl, // XXX why not dt and dd?
nsGkAtoms::fieldset,
nsGkAtoms::figure, // XXX shouldn't figcaption be on this list
nsGkAtoms::footer, nsGkAtoms::form, nsGkAtoms::h1, nsGkAtoms::h2,
nsGkAtoms::h3, nsGkAtoms::h4, nsGkAtoms::h5, nsGkAtoms::h6,
nsGkAtoms::header, nsGkAtoms::hgroup, nsGkAtoms::hr, nsGkAtoms::li,
nsGkAtoms::listing, nsGkAtoms::menu, nsGkAtoms::nav, nsGkAtoms::ol,
nsGkAtoms::p, nsGkAtoms::pre, nsGkAtoms::section, nsGkAtoms::table,
nsGkAtoms::ul, nsGkAtoms::xmp);
}
/* static */
bool nsContentUtils::ParseIntMarginValue(const nsAString& aString,
nsIntMargin& result) {
nsAutoString marginStr(aString);
marginStr.CompressWhitespace(true, true);
if (marginStr.IsEmpty()) {
return false;
}
int32_t start = 0, end = 0;
for (int count = 0; count < 4; count++) {
if ((uint32_t)end >= marginStr.Length()) return false;
// top, right, bottom, left
if (count < 3)
end = Substring(marginStr, start).FindChar(',');
else
end = Substring(marginStr, start).Length();
if (end <= 0) return false;
nsresult ec;
int32_t val = nsString(Substring(marginStr, start, end)).ToInteger(&ec);
if (NS_FAILED(ec)) return false;
switch (count) {
case 0:
result.top = val;
break;
case 1:
result.right = val;
break;
case 2:
result.bottom = val;
break;
case 3:
result.left = val;
break;
}
start += end + 1;
}
return true;
}
// static
int32_t nsContentUtils::ParseLegacyFontSize(const nsAString& aValue) {
nsAString::const_iterator iter, end;
aValue.BeginReading(iter);
aValue.EndReading(end);
while (iter != end && nsContentUtils::IsHTMLWhitespace(*iter)) {
++iter;
}
if (iter == end) {
return 0;
}
bool relative = false;
bool negate = false;
if (*iter == char16_t('-')) {
relative = true;
negate = true;
++iter;
} else if (*iter == char16_t('+')) {
relative = true;
++iter;
}
if (iter == end || *iter < char16_t('0') || *iter > char16_t('9')) {
return 0;
}
// We don't have to worry about overflow, since we can bail out as soon as
// we're bigger than 7.
int32_t value = 0;
while (iter != end && *iter >= char16_t('0') && *iter <= char16_t('9')) {
value = 10 * value + (*iter - char16_t('0'));
if (value >= 7) {
break;
}
++iter;
}
if (relative) {
if (negate) {
value = 3 - value;
} else {
value = 3 + value;
}
}
return clamped(value, 1, 7);
}
/* static */
void nsContentUtils::GetOfflineAppManifest(Document* aDocument, nsIURI** aURI) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aDocument);
*aURI = nullptr;
if (aDocument->GetController().isSome()) {
return;
}
Element* docElement = aDocument->GetRootElement();
if (!docElement) {
return;
}
nsAutoString manifestSpec;
docElement->GetAttr(kNameSpaceID_None, nsGkAtoms::manifest, manifestSpec);
// Manifest URIs can't have fragment identifiers.
if (manifestSpec.IsEmpty() || manifestSpec.Contains('#')) {
return;
}
nsContentUtils::NewURIWithDocumentCharset(aURI, manifestSpec, aDocument,
aDocument->GetDocBaseURI());
}
/* static */
bool nsContentUtils::OfflineAppAllowed(nsIURI* aURI) {
nsCOMPtr<nsIOfflineCacheUpdateService> updateService =
components::OfflineCacheUpdate::Service();
if (!updateService) {
return false;
}
bool allowed;
nsresult rv = updateService->OfflineAppAllowedForURI(aURI, &allowed);
return NS_SUCCEEDED(rv) && allowed;
}
/* static */
bool nsContentUtils::OfflineAppAllowed(nsIPrincipal* aPrincipal) {
nsCOMPtr<nsIOfflineCacheUpdateService> updateService =
components::OfflineCacheUpdate::Service();
if (!updateService) {
return false;
}
bool allowed;
nsresult rv = updateService->OfflineAppAllowed(aPrincipal, &allowed);
return NS_SUCCEEDED(rv) && allowed;
}
static bool IsErrorPage(nsIURI* aURI) {
if (!aURI) {
return false;
}
if (!aURI->SchemeIs("about")) {
return false;
}
nsAutoCString name;
nsresult rv = NS_GetAboutModuleName(aURI, name);
NS_ENSURE_SUCCESS(rv, false);
return name.EqualsLiteral("certerror") || name.EqualsLiteral("neterror") ||
name.EqualsLiteral("blocked");
}
/* static */
bool nsContentUtils::PrincipalAllowsL10n(nsIPrincipal* aPrincipal,
nsIURI* aDocumentURI) {
if (IsErrorPage(aDocumentURI)) {
return true;
}
// The system principal is always allowed.
if (IsSystemPrincipal(aPrincipal)) {
return true;
}
nsCOMPtr<nsIURI> uri;
nsresult rv = aPrincipal->GetURI(getter_AddRefs(uri));
NS_ENSURE_SUCCESS(rv, false);
bool hasFlags;
// Allow access to uris that cannot be loaded by web content.
rv = NS_URIChainHasFlags(uri, nsIProtocolHandler::URI_DANGEROUS_TO_LOAD,
&hasFlags);
NS_ENSURE_SUCCESS(rv, false);
if (hasFlags) {
return true;
}
// UI resources also get access.
rv = NS_URIChainHasFlags(uri, nsIProtocolHandler::URI_IS_UI_RESOURCE,
&hasFlags);
NS_ENSURE_SUCCESS(rv, false);
if (hasFlags) {
return true;
}
auto principal = BasePrincipal::Cast(aPrincipal);
auto policy = principal->AddonPolicy();
return (policy && policy->IsPrivileged());
}
// static
void nsContentUtils::Shutdown() {
sInitialized = false;
nsHTMLTags::ReleaseTable();
NS_IF_RELEASE(sContentPolicyService);
sTriedToGetContentPolicy = false;
uint32_t i;
for (i = 0; i < PropertiesFile_COUNT; ++i) NS_IF_RELEASE(sStringBundles[i]);
NS_IF_RELEASE(sStringBundleService);
NS_IF_RELEASE(sConsoleService);
NS_IF_RELEASE(sXPConnect);
NS_IF_RELEASE(sSecurityManager);
NS_IF_RELEASE(sSystemPrincipal);
NS_IF_RELEASE(sNullSubjectPrincipal);
NS_IF_RELEASE(sIOService);
NS_IF_RELEASE(sUUIDGenerator);
sLineBreaker = nullptr;
sWordBreaker = nullptr;
sBidiKeyboard = nullptr;
delete sAtomEventTable;
sAtomEventTable = nullptr;
delete sStringEventTable;
sStringEventTable = nullptr;
delete sUserDefinedEvents;
sUserDefinedEvents = nullptr;
if (sEventListenerManagersHash) {
NS_ASSERTION(sEventListenerManagersHash->EntryCount() == 0,
"Event listener manager hash not empty at shutdown!");
// See comment above.
// However, we have to handle this table differently. If it still
// has entries, we want to leak it too, so that we can keep it alive
// in case any elements are destroyed. Because if they are, we need
// their event listener managers to be destroyed too, or otherwise
// it could leave dangling references in DOMClassInfo's preserved
// wrapper table.
if (sEventListenerManagersHash->EntryCount() == 0) {
delete sEventListenerManagersHash;
sEventListenerManagersHash = nullptr;
}
}
NS_ASSERTION(!sBlockedScriptRunners || sBlockedScriptRunners->Length() == 0,
"How'd this happen?");
delete sBlockedScriptRunners;
sBlockedScriptRunners = nullptr;
delete sShiftText;
sShiftText = nullptr;
delete sControlText;
sControlText = nullptr;
delete sMetaText;
sMetaText = nullptr;
delete sOSText;
sOSText = nullptr;
delete sAltText;
sAltText = nullptr;
delete sModifierSeparator;
sModifierSeparator = nullptr;
delete sJSBytecodeMimeType;
sJSBytecodeMimeType = nullptr;
NS_IF_RELEASE(sSameOriginChecker);
if (sUserInteractionObserver) {
sUserInteractionObserver->Shutdown();
NS_RELEASE(sUserInteractionObserver);
}
TextControlState::Shutdown();
nsMappedAttributes::Shutdown();
}
/**
* Checks whether two nodes come from the same origin. aTrustedNode is
* considered 'safe' in that a user can operate on it.
*/
// static
nsresult nsContentUtils::CheckSameOrigin(const nsINode* aTrustedNode,
const nsINode* unTrustedNode) {
MOZ_ASSERT(aTrustedNode);
MOZ_ASSERT(unTrustedNode);
/*
* Get hold of each node's principal
*/
nsIPrincipal* trustedPrincipal = aTrustedNode->NodePrincipal();
nsIPrincipal* unTrustedPrincipal = unTrustedNode->NodePrincipal();
if (trustedPrincipal == unTrustedPrincipal) {
return NS_OK;
}
bool equal;
// XXXbz should we actually have a Subsumes() check here instead? Or perhaps
// a separate method for that, with callers using one or the other?
if (NS_FAILED(trustedPrincipal->Equals(unTrustedPrincipal, &equal)) ||
!equal) {
return NS_ERROR_DOM_PROP_ACCESS_DENIED;
}
return NS_OK;
}
// static
bool nsContentUtils::CanCallerAccess(nsIPrincipal* aSubjectPrincipal,
nsIPrincipal* aPrincipal) {
bool subsumes;
nsresult rv = aSubjectPrincipal->Subsumes(aPrincipal, &subsumes);
NS_ENSURE_SUCCESS(rv, false);
if (subsumes) {
return true;
}
// The subject doesn't subsume aPrincipal. Allow access only if the subject
// is chrome.
return IsCallerChrome();
}
// static
bool nsContentUtils::CanCallerAccess(const nsINode* aNode) {
nsIPrincipal* subject = SubjectPrincipal();
if (IsSystemPrincipal(subject)) {
return true;
}
if (aNode->ChromeOnlyAccess()) {
return false;
}
return CanCallerAccess(subject, aNode->NodePrincipal());
}
// static
bool nsContentUtils::CanCallerAccess(nsPIDOMWindowInner* aWindow) {
nsCOMPtr<nsIScriptObjectPrincipal> scriptObject = do_QueryInterface(aWindow);
NS_ENSURE_TRUE(scriptObject, false);
return CanCallerAccess(SubjectPrincipal(), scriptObject->GetPrincipal());
}
// static
bool nsContentUtils::PrincipalHasPermission(nsIPrincipal* aPrincipal,
const nsAtom* aPerm) {
// Chrome gets access by default.
if (IsSystemPrincipal(aPrincipal)) {
return true;
}
// Otherwise, only allow if caller is an addon with the permission.
return BasePrincipal::Cast(aPrincipal)->AddonHasPermission(aPerm);
}
// static
bool nsContentUtils::CallerHasPermission(JSContext* aCx, const nsAtom* aPerm) {
return PrincipalHasPermission(SubjectPrincipal(aCx), aPerm);
}
// static
nsIPrincipal* nsContentUtils::GetAttrTriggeringPrincipal(
nsIContent* aContent, const nsAString& aAttrValue,
nsIPrincipal* aSubjectPrincipal) {
nsIPrincipal* contentPrin = aContent ? aContent->NodePrincipal() : nullptr;
// If the subject principal is the same as the content principal, or no
// explicit subject principal was provided, we don't need to do any further
// checks. Just return the content principal.
if (contentPrin == aSubjectPrincipal || !aSubjectPrincipal) {
return contentPrin;
}
// Only use the subject principal if the URL string we are going to end up
// fetching is under the control of that principal, which is never the case
// for relative URLs.
if (aAttrValue.IsEmpty() ||
!IsAbsoluteURL(NS_ConvertUTF16toUTF8(aAttrValue))) {
return contentPrin;
}
// Only use the subject principal as the attr triggering principal if it
// should override the CSP of the node's principal.
if (BasePrincipal::Cast(aSubjectPrincipal)->OverridesCSP(contentPrin)) {
return aSubjectPrincipal;
}
return contentPrin;
}
// static
bool nsContentUtils::IsAbsoluteURL(const nsACString& aURL) {
nsAutoCString scheme;
if (NS_FAILED(net_ExtractURLScheme(aURL, scheme))) {
// If we can't extract a scheme, it's not an absolute URL.
return false;
}
// If it parses as an absolute StandardURL, it's definitely an absolute URL,
// so no need to check with the IO service.
if (net_IsAbsoluteURL(aURL)) {
return true;
}
uint32_t flags;
if (NS_SUCCEEDED(sIOService->GetProtocolFlags(scheme.get(), &flags))) {
return flags & nsIProtocolHandler::URI_NORELATIVE;
}
return false;
}
// static
bool nsContentUtils::InProlog(nsINode* aNode) {
MOZ_ASSERT(aNode, "missing node to nsContentUtils::InProlog");
nsINode* parent = aNode->GetParentNode();
if (!parent || !parent->IsDocument()) {
return false;
}
Document* doc = parent->AsDocument();
nsIContent* root = doc->GetRootElement();
return !root || doc->ComputeIndexOf(aNode) < doc->ComputeIndexOf(root);
}
bool nsContentUtils::IsCallerChrome() {
MOZ_ASSERT(NS_IsMainThread());
if (SubjectPrincipal() == sSystemPrincipal) {
return true;
}
// If the check failed, look for UniversalXPConnect on the cx compartment.
return xpc::IsUniversalXPConnectEnabled(GetCurrentJSContext());
}
#ifdef FUZZING
bool nsContentUtils::IsFuzzingEnabled() {
return StaticPrefs::fuzzing_enabled();
}
#endif
/* static */
bool nsContentUtils::IsCallerChromeOrElementTransformGettersEnabled(
JSContext* aCx, JSObject*) {
return ThreadsafeIsSystemCaller(aCx) ||
StaticPrefs::dom_element_transform_getters_enabled();
}
/* static */
bool nsContentUtils::ShouldResistFingerprinting() {
return StaticPrefs::privacy_resistFingerprinting();
}
bool nsContentUtils::ShouldResistFingerprinting(nsIDocShell* aDocShell) {
if (!aDocShell) {
return false;
}
return ShouldResistFingerprinting(aDocShell->GetDocument());
}
/* static */
bool nsContentUtils::ShouldResistFingerprinting(const Document* aDoc) {
if (!aDoc) {
return false;
}
bool isChrome = nsContentUtils::IsChromeDoc(aDoc);
return !isChrome && ShouldResistFingerprinting();
}
/* static */
bool nsContentUtils::ShouldResistFingerprinting(nsIPrincipal* aPrincipal) {
if (!aPrincipal) {
return false;
}
bool isChrome = nsContentUtils::IsSystemPrincipal(aPrincipal);
return !isChrome && ShouldResistFingerprinting();
}
/* static */
bool nsContentUtils::ShouldResistFingerprinting(WorkerPrivate* aWorkerPrivate) {
if (!aWorkerPrivate) {
// We may be on a non-worker thread!
return ShouldResistFingerprinting();
}
bool isChrome = aWorkerPrivate->UsesSystemPrincipal();
return !isChrome && ShouldResistFingerprinting();
}
/* static */
bool nsContentUtils::UseStandinsForNativeColors() {
return ShouldResistFingerprinting() ||
StaticPrefs::ui_use_standins_for_native_colors();
}
/* static */
void nsContentUtils::CalcRoundedWindowSizeForResistingFingerprinting(
int32_t aChromeWidth, int32_t aChromeHeight, int32_t aScreenWidth,
int32_t aScreenHeight, int32_t aInputWidth, int32_t aInputHeight,
bool aSetOuterWidth, bool aSetOuterHeight, int32_t* aOutputWidth,
int32_t* aOutputHeight) {
MOZ_ASSERT(aOutputWidth);
MOZ_ASSERT(aOutputHeight);
int32_t availContentWidth = 0;
int32_t availContentHeight = 0;
availContentWidth = std::min(StaticPrefs::privacy_window_maxInnerWidth(),
aScreenWidth - aChromeWidth);
#ifdef MOZ_WIDGET_GTK
// In the GTK window, it will not report outside system decorations
// when we get available window size, see Bug 581863. So, we leave a
// 40 pixels space for them when calculating the available content
// height. It is not necessary for the width since the content width
// is usually pretty much the same as the chrome width.
availContentHeight = std::min(StaticPrefs::privacy_window_maxInnerHeight(),
(-40 + aScreenHeight) - aChromeHeight);
#else
availContentHeight = std::min(StaticPrefs::privacy_window_maxInnerHeight(),
aScreenHeight - aChromeHeight);
#endif
// Ideally, we'd like to round window size to 1000x1000, but the
// screen space could be too small to accommodate this size in some
// cases. If it happens, we would round the window size to the nearest
// 200x100.
availContentWidth = availContentWidth - (availContentWidth % 200);
availContentHeight = availContentHeight - (availContentHeight % 100);
// If aIsOuter is true, we are setting the outer window. So we
// have to consider the chrome UI.
int32_t chromeOffsetWidth = aSetOuterWidth ? aChromeWidth : 0;
int32_t chromeOffsetHeight = aSetOuterHeight ? aChromeHeight : 0;
int32_t resultWidth = 0, resultHeight = 0;
// if the original size is greater than the maximum available size, we set
// it to the maximum size. And if the original value is less than the
// minimum rounded size, we set it to the minimum 200x100.
if (aInputWidth > (availContentWidth + chromeOffsetWidth)) {
resultWidth = availContentWidth + chromeOffsetWidth;
} else if (aInputWidth < (200 + chromeOffsetWidth)) {
resultWidth = 200 + chromeOffsetWidth;
} else {
// Otherwise, we round the window to the nearest upper rounded 200x100.
resultWidth = NSToIntCeil((aInputWidth - chromeOffsetWidth) / 200.0) * 200 +
chromeOffsetWidth;
}
if (aInputHeight > (availContentHeight + chromeOffsetHeight)) {
resultHeight = availContentHeight + chromeOffsetHeight;
} else if (aInputHeight < (100 + chromeOffsetHeight)) {
resultHeight = 100 + chromeOffsetHeight;
} else {
resultHeight =
NSToIntCeil((aInputHeight - chromeOffsetHeight) / 100.0) * 100 +
chromeOffsetHeight;
}
*aOutputWidth = resultWidth;
*aOutputHeight = resultHeight;
}
bool nsContentUtils::ThreadsafeIsCallerChrome() {
return NS_IsMainThread() ? IsCallerChrome()
: IsCurrentThreadRunningChromeWorker();
}
bool nsContentUtils::IsCallerContentXBL() {
JSContext* cx = GetCurrentJSContext();
if (!cx) return false;
JS::Realm* realm = JS::GetCurrentRealmOrNull(cx);
if (!realm) return false;
// For remote XUL, we run XBL in the XUL scope. Given that we care about
// compat and not security for remote XUL, just always claim to be XBL.
if (!xpc::AllowContentXBLScope(realm)) {
MOZ_ASSERT(
nsContentUtils::AllowXULXBLForPrincipal(xpc::GetRealmPrincipal(realm)));
return true;
}
return false;
}
bool nsContentUtils::IsCallerUAWidget() {
JSContext* cx = GetCurrentJSContext();
if (!cx) {
return false;
}
JS::Realm* realm = JS::GetCurrentRealmOrNull(cx);
if (!realm) {
return false;
}
return xpc::IsUAWidgetScope(realm);
}
bool nsContentUtils::IsSystemCaller(JSContext* aCx) {
// Note that SubjectPrincipal() assumes we are in a compartment here.
return SubjectPrincipal(aCx) == sSystemPrincipal;
}
bool nsContentUtils::ThreadsafeIsSystemCaller(JSContext* aCx) {
CycleCollectedJSContext* ccjscx = CycleCollectedJSContext::Get();
MOZ_ASSERT(ccjscx->Context() == aCx);
return ccjscx->IsSystemCaller();
}
// static
bool nsContentUtils::LookupBindingMember(
JSContext* aCx, nsIContent* aContent, JS::Handle<jsid> aId,
JS::MutableHandle<JS::PropertyDescriptor> aDesc) {
return true;
}
// static
nsINode* nsContentUtils::GetCrossDocParentNode(nsINode* aChild) {
MOZ_ASSERT(aChild, "The child is null!");
nsINode* parent = aChild->GetParentNode();
if (parent && parent->IsContent() && aChild->IsContent()) {
parent = aChild->AsContent()->GetFlattenedTreeParent();
}
if (parent || !aChild->IsDocument()) {
return parent;
}
Document* doc = aChild->AsDocument();
Document* parentDoc = doc->GetInProcessParentDocument();
return parentDoc ? parentDoc->FindContentForSubDocument(doc) : nullptr;
}
bool nsContentUtils::ContentIsHostIncludingDescendantOf(
const nsINode* aPossibleDescendant, const nsINode* aPossibleAncestor) {
MOZ_ASSERT(aPossibleDescendant, "The possible descendant is null!");
MOZ_ASSERT(aPossibleAncestor, "The possible ancestor is null!");
do {
if (aPossibleDescendant == aPossibleAncestor) return true;
if (aPossibleDescendant->IsDocumentFragment()) {
aPossibleDescendant =
aPossibleDescendant->AsDocumentFragment()->GetHost();
} else {
aPossibleDescendant = aPossibleDescendant->GetParentNode();
}
} while (aPossibleDescendant);
return false;
}
// static
bool nsContentUtils::ContentIsCrossDocDescendantOf(nsINode* aPossibleDescendant,
nsINode* aPossibleAncestor) {
MOZ_ASSERT(aPossibleDescendant, "The possible descendant is null!");
MOZ_ASSERT(aPossibleAncestor, "The possible ancestor is null!");
do {
if (aPossibleDescendant == aPossibleAncestor) return true;
aPossibleDescendant = GetCrossDocParentNode(aPossibleDescendant);
} while (aPossibleDescendant);
return false;
}
// static
bool nsContentUtils::ContentIsFlattenedTreeDescendantOf(
const nsINode* aPossibleDescendant, const nsINode* aPossibleAncestor) {
MOZ_ASSERT(aPossibleDescendant, "The possible descendant is null!");
MOZ_ASSERT(aPossibleAncestor, "The possible ancestor is null!");
do {
if (aPossibleDescendant == aPossibleAncestor) {
return true;
}
aPossibleDescendant = aPossibleDescendant->GetFlattenedTreeParentNode();
} while (aPossibleDescendant);
return false;
}
// static
bool nsContentUtils::ContentIsFlattenedTreeDescendantOfForStyle(
const nsINode* aPossibleDescendant, const nsINode* aPossibleAncestor) {
MOZ_ASSERT(aPossibleDescendant, "The possible descendant is null!");
MOZ_ASSERT(aPossibleAncestor, "The possible ancestor is null!");
do {
if (aPossibleDescendant == aPossibleAncestor) {
return true;
}
aPossibleDescendant =
aPossibleDescendant->GetFlattenedTreeParentNodeForStyle();
} while (aPossibleDescendant);
return false;
}
// static
nsINode* nsContentUtils::Retarget(nsINode* aTargetA, nsINode* aTargetB) {
while (true && aTargetA) {
// If A's root is not a shadow root...
nsINode* root = aTargetA->SubtreeRoot();
if (!root->IsShadowRoot()) {
// ...then return A.
return aTargetA;
}
// or A's root is a shadow-including inclusive ancestor of B...
if (aTargetB->IsShadowIncludingInclusiveDescendantOf(root)) {
// ...then return A.
return aTargetA;
}
aTargetA = ShadowRoot::FromNode(root)->GetHost();
}
return nullptr;
}
// static
nsresult nsContentUtils::GetAncestors(nsINode* aNode,
nsTArray<nsINode*>& aArray) {
while (aNode) {
aArray.AppendElement(aNode);
aNode = aNode->GetParentNode();
}
return NS_OK;
}
// static
nsresult nsContentUtils::GetAncestorsAndOffsets(
nsINode* aNode, int32_t aOffset, nsTArray<nsIContent*>* aAncestorNodes,
nsTArray<int32_t>* aAncestorOffsets) {
NS_ENSURE_ARG_POINTER(aNode);
if (!aNode->IsContent()) {
return NS_ERROR_FAILURE;
}
nsIContent* content = aNode->AsContent();
if (!aAncestorNodes->IsEmpty()) {
NS_WARNING("aAncestorNodes is not empty");
aAncestorNodes->Clear();
}
if (!aAncestorOffsets->IsEmpty()) {
NS_WARNING("aAncestorOffsets is not empty");
aAncestorOffsets->Clear();
}
// insert the node itself
aAncestorNodes->AppendElement(content);
aAncestorOffsets->AppendElement(aOffset);
// insert all the ancestors
nsIContent* child = content;
nsIContent* parent = child->GetParent();
while (parent) {
aAncestorNodes->AppendElement(parent);
aAncestorOffsets->AppendElement(parent->ComputeIndexOf(child));
child = parent;
parent = parent->GetParent();
}
return NS_OK;
}
template <typename Node, typename GetParentFunc>
static Node* GetCommonAncestorInternal(Node* aNode1, Node* aNode2,
GetParentFunc aGetParentFunc) {
MOZ_ASSERT(aNode1 != aNode2);
// Build the chain of parents
AutoTArray<Node*, 30> parents1, parents2;
do {
parents1.AppendElement(aNode1);
aNode1 = aGetParentFunc(aNode1);
} while (aNode1);
do {
parents2.AppendElement(aNode2);
aNode2 = aGetParentFunc(aNode2);
} while (aNode2);
// Find where the parent chain differs
uint32_t pos1 = parents1.Length();
uint32_t pos2 = parents2.Length();
Node* parent = nullptr;
uint32_t len;
for (len = std::min(pos1, pos2); len > 0; --len) {
Node* child1 = parents1.ElementAt(--pos1);
Node* child2 = parents2.ElementAt(--pos2);
if (child1 != child2) {
break;
}
parent = child1;
}
return parent;
}
/* static */
nsINode* nsContentUtils::GetCommonAncestorHelper(nsINode* aNode1,
nsINode* aNode2) {
return GetCommonAncestorInternal(
aNode1, aNode2, [](nsINode* aNode) { return aNode->GetParentNode(); });
}
/* static */
nsIContent* nsContentUtils::GetCommonFlattenedTreeAncestorHelper(
nsIContent* aContent1, nsIContent* aContent2) {
return GetCommonAncestorInternal(
aContent1, aContent2,
[](nsIContent* aContent) { return aContent->GetFlattenedTreeParent(); });
}
/* static */
Element* nsContentUtils::GetCommonFlattenedTreeAncestorForStyle(
Element* aElement1, Element* aElement2) {
return GetCommonAncestorInternal(aElement1, aElement2, [](Element* aElement) {
return aElement->GetFlattenedTreeParentElementForStyle();
});
}
/* static */
bool nsContentUtils::PositionIsBefore(nsINode* aNode1, nsINode* aNode2,
int32_t* aNode1Index,
int32_t* aNode2Index) {
// Note, CompareDocumentPosition takes the latter params in different order.
return (aNode2->CompareDocumentPosition(*aNode1, aNode2Index, aNode1Index) &
(Node_Binding::DOCUMENT_POSITION_PRECEDING |
Node_Binding::DOCUMENT_POSITION_DISCONNECTED)) ==
Node_Binding::DOCUMENT_POSITION_PRECEDING;
}
/* static */
int32_t nsContentUtils::ComparePoints(const nsINode* aParent1, int32_t aOffset1,
const nsINode* aParent2, int32_t aOffset2,
bool* aDisconnected,
ComparePointsCache* aParent1Cache) {
if (aParent1 == aParent2) {
// XXX This is odd. aOffset1 and/or aOffset2 may be -1, e.g., it's result
// of nsINode::ComputeIndexOf(), but this compares such invalid
// offset with valid offset.
return aOffset1 < aOffset2 ? -1 : aOffset1 > aOffset2 ? 1 : 0;
}
AutoTArray<const nsINode*, 32> parents1, parents2;
const nsINode* node1 = aParent1;
const nsINode* node2 = aParent2;
do {
parents1.AppendElement(node1);
node1 = node1->GetParentNode();
} while (node1);
do {
parents2.AppendElement(node2);
node2 = node2->GetParentNode();
} while (node2);
uint32_t pos1 = parents1.Length() - 1;
uint32_t pos2 = parents2.Length() - 1;
bool disconnected = parents1.ElementAt(pos1) != parents2.ElementAt(pos2);
if (aDisconnected) {
*aDisconnected = disconnected;
}
if (disconnected) {
NS_ASSERTION(aDisconnected, "unexpected disconnected nodes");
return 1;
}
// Find where the parent chains differ
const nsINode* parent = parents1.ElementAt(pos1);
uint32_t len;
for (len = std::min(pos1, pos2); len > 0; --len) {
const nsINode* child1 = parents1.ElementAt(--pos1);
const nsINode* child2 = parents2.ElementAt(--pos2);
if (child1 != child2) {
int32_t child1index = aParent1Cache
? aParent1Cache->ComputeIndexOf(parent, child1)
: parent->ComputeIndexOf(child1);
return child1index < parent->ComputeIndexOf(child2) ? -1 : 1;
}
parent = child1;
}
// The parent chains never differed, so one of the nodes is an ancestor of
// the other
NS_ASSERTION(!pos1 || !pos2,
"should have run out of parent chain for one of the nodes");
if (!pos1) {
const nsINode* child2 = parents2.ElementAt(--pos2);
// XXX aOffset1 may be -1 as mentioned above. So, why does this return
// it's *before* of the valid DOM point?
return aOffset1 <= parent->ComputeIndexOf(child2) ? -1 : 1;
}
const nsINode* child1 = parents1.ElementAt(--pos1);
// XXX aOffset2 may be -1 as mentioned above. So, why does this return it's
// *after* of the valid DOM point?
int32_t child1index = aParent1Cache
? aParent1Cache->ComputeIndexOf(parent, child1)
: parent->ComputeIndexOf(child1);
return child1index < aOffset2 ? -1 : 1;
}
// static
nsINode* nsContentUtils::GetCommonAncestorUnderInteractiveContent(
nsINode* aNode1, nsINode* aNode2) {
if (!aNode1 || !aNode2) {
return nullptr;
}
if (aNode1 == aNode2) {
return aNode1;
}
// Build the chain of parents
AutoTArray<nsINode*, 30> parents1;
do {
parents1.AppendElement(aNode1);
if (aNode1->IsElement() &&
aNode1->AsElement()->IsInteractiveHTMLContent(true)) {
break;
}
aNode1 = aNode1->GetFlattenedTreeParentNode();
} while (aNode1);
AutoTArray<nsINode*, 30> parents2;
do {
parents2.AppendElement(aNode2);
if (aNode2->IsElement() &&
aNode2->AsElement()->IsInteractiveHTMLContent(true)) {
break;
}
aNode2 = aNode2->GetFlattenedTreeParentNode();
} while (aNode2);
// Find where the parent chain differs
uint32_t pos1 = parents1.Length();
uint32_t pos2 = parents2.Length();
nsINode* parent = nullptr;
for (uint32_t len = std::min(pos1, pos2); len > 0; --len) {
nsINode* child1 = parents1.ElementAt(--pos1);
nsINode* child2 = parents2.ElementAt(--pos2);
if (child1 != child2) {
break;
}
parent = child1;
}
return parent;
}
/* static */
template <typename FPT, typename FRT, typename SPT, typename SRT>
int32_t nsContentUtils::ComparePoints(
const RangeBoundaryBase<FPT, FRT>& aFirstBoundary,
const RangeBoundaryBase<SPT, SRT>& aSecondBoundary, bool* aDisconnected) {
if (NS_WARN_IF(!aFirstBoundary.IsSet()) ||
NS_WARN_IF(!aSecondBoundary.IsSet())) {
return -1;
}
// XXX Re-implement this without calling `Offset()` as far as possible,
// and the other overload should be an alias of this.
return ComparePoints(aFirstBoundary.Container(), aFirstBoundary.Offset(),
aSecondBoundary.Container(), aSecondBoundary.Offset(),
aDisconnected);
}
inline bool IsCharInSet(const char* aSet, const char16_t aChar) {
char16_t ch;
while ((ch = *aSet)) {
if (aChar == char16_t(ch)) {
return true;
}
++aSet;
}
return false;
}
/**
* This method strips leading/trailing chars, in given set, from string.
*/
// static
const nsDependentSubstring nsContentUtils::TrimCharsInSet(
const char* aSet, const nsAString& aValue) {
nsAString::const_iterator valueCurrent, valueEnd;
aValue.BeginReading(valueCurrent);
aValue.EndReading(valueEnd);
// Skip characters in the beginning
while (valueCurrent != valueEnd) {
if (!IsCharInSet(aSet, *valueCurrent)) {
break;
}
++valueCurrent;
}
if (valueCurrent != valueEnd) {
for (;;) {
--valueEnd;
if (!IsCharInSet(aSet, *valueEnd)) {
break;
}
}
++valueEnd; // Step beyond the last character we want in the value.
}
// valueEnd should point to the char after the last to copy
return Substring(valueCurrent, valueEnd);
}
/**
* This method strips leading and trailing whitespace from a string.
*/
// static
template <bool IsWhitespace(char16_t)>
const nsDependentSubstring nsContentUtils::TrimWhitespace(const nsAString& aStr,
bool aTrimTrailing) {
nsAString::const_iterator start, end;
aStr.BeginReading(start);
aStr.EndReading(end);
// Skip whitespace characters in the beginning
while (start != end && IsWhitespace(*start)) {
++start;
}
if (aTrimTrailing) {
// Skip whitespace characters in the end.
while (end != start) {
--end;
if (!IsWhitespace(*end)) {
// Step back to the last non-whitespace character.
++end;
break;
}
}
}
// Return a substring for the string w/o leading and/or trailing
// whitespace
return Substring(start, end);
}
// Declaring the templates we are going to use avoid linking issues without
// inlining the method. Considering there is not so much spaces checking
// methods we can consider this to be better than inlining.
template const nsDependentSubstring
nsContentUtils::TrimWhitespace<nsCRT::IsAsciiSpace>(const nsAString&, bool);
template const nsDependentSubstring nsContentUtils::TrimWhitespace<
nsContentUtils::IsHTMLWhitespace>(const nsAString&, bool);
template const nsDependentSubstring nsContentUtils::TrimWhitespace<
nsContentUtils::IsHTMLWhitespaceOrNBSP>(const nsAString&, bool);
static inline void KeyAppendSep(nsACString& aKey) {
if (!aKey.IsEmpty()) {
aKey.Append('>');
}
}
static inline void KeyAppendString(const nsAString& aString, nsACString& aKey) {
KeyAppendSep(aKey);
// Could escape separator here if collisions happen. > is not a legal char
// for a name or type attribute, so we should be safe avoiding that extra
// work.
AppendUTF16toUTF8(aString, aKey);
}
static inline void KeyAppendString(const nsACString& aString,
nsACString& aKey) {
KeyAppendSep(aKey);
// Could escape separator here if collisions happen. > is not a legal char
// for a name or type attribute, so we should be safe avoiding that extra
// work.
aKey.Append(aString);
}
static inline void KeyAppendInt(int32_t aInt, nsACString& aKey) {
KeyAppendSep(aKey);
aKey.AppendInt(aInt);
}
static inline bool IsAutocompleteOff(const nsIContent* aContent) {
return aContent->IsElement() &&
aContent->AsElement()->AttrValueIs(
kNameSpaceID_None, nsGkAtoms::autocomplete,
NS_LITERAL_STRING("off"), eIgnoreCase);
}
/*static*/
void nsContentUtils::GenerateStateKey(nsIContent* aContent, Document* aDocument,
nsACString& aKey) {
MOZ_ASSERT(aContent);
aKey.Truncate();
uint32_t partID = aDocument ? aDocument->GetPartID() : 0;
// Don't capture state for anonymous content
if (aContent->IsInAnonymousSubtree()) {
return;
}
if (IsAutocompleteOff(aContent)) {
return;
}
RefPtr<Document> doc = aContent->GetUncomposedDoc();
KeyAppendInt(partID, aKey); // first append a partID
bool generatedUniqueKey = false;
if (doc && doc->IsHTMLOrXHTML()) {
nsHTMLDocument* htmlDoc = doc->AsHTMLDocument();
// If we have a form control and can calculate form information, use that
// as the key - it is more reliable than just recording position in the
// DOM.
// XXXbz Is it, really? We have bugs on this, I think...
// Important to have a unique key, and tag/type/name may not be.
//
// The format of the key depends on whether the control has a form,
// and whether the element was parser inserted:
//
// [Has Form, Parser Inserted]:
// fp>type>FormNum>IndOfControlInForm>FormName>name
//
// [No Form, Parser Inserted]:
// dp>type>ControlNum>name
//
// [Has Form, Not Parser Inserted]:
// fn>type>IndOfFormInDoc>IndOfControlInForm>FormName>name
//
// [No Form, Not Parser Inserted]:
// dn>type>IndOfControlInDoc>name
//
// XXX We don't need to use index if name is there
// XXXbz We don't? Why not? I don't follow.
//
nsCOMPtr<nsIFormControl> control(do_QueryInterface(aContent));
if (control) {
// Get the control number if this was a parser inserted element from the
// network.
int32_t controlNumber =
control->GetParserInsertedControlNumberForStateKey();
bool parserInserted = controlNumber != -1;
RefPtr<nsContentList> htmlForms;
RefPtr<nsContentList> htmlFormControls;
if (!parserInserted) {
// Getting these lists is expensive, as we need to keep them up to date
// as the document loads, so we avoid it if we don't need them.
htmlDoc->GetFormsAndFormControls(getter_AddRefs(htmlForms),
getter_AddRefs(htmlFormControls));
}
// Append the control type
KeyAppendInt(control->ControlType(), aKey);
// If in a form, add form name / index of form / index in form
HTMLFormElement* formElement = control->GetFormElement();
if (formElement) {
if (IsAutocompleteOff(formElement)) {
aKey.Truncate();
return;
}
// Append the form number, if this is a parser inserted control, or
// the index of the form in the document otherwise.
bool appendedForm = false;
if (parserInserted) {
MOZ_ASSERT(formElement->GetFormNumberForStateKey() != -1,
"when generating a state key for a parser inserted form "
"control we should have a parser inserted <form> element");
KeyAppendString(NS_LITERAL_CSTRING("fp"), aKey);
KeyAppendInt(formElement->GetFormNumberForStateKey(), aKey);
appendedForm = true;
} else {
KeyAppendString(NS_LITERAL_CSTRING("fn"), aKey);
int32_t index = htmlForms->IndexOf(formElement, false);
if (index <= -1) {
//
// XXX HACK this uses some state that was dumped into the document
// specifically to fix bug 138892. What we are trying to do is
// *guess* which form this control's state is found in, with the
// highly likely guess that the highest form parsed so far is the
// one. This code should not be on trunk, only branch.
//
index = htmlDoc->GetNumFormsSynchronous() - 1;
}
if (index > -1) {
KeyAppendInt(index, aKey);
appendedForm = true;
}
}
if (appendedForm) {
// Append the index of the control in the form
int32_t index = formElement->IndexOfControl(control);
if (index > -1) {
KeyAppendInt(index, aKey);
generatedUniqueKey = true;
}
}
// Append the form name
nsAutoString formName;
formElement->GetAttr(kNameSpaceID_None, nsGkAtoms::name, formName);
KeyAppendString(formName, aKey);
} else {
// Not in a form. Append the control number, if this is a parser
// inserted control, or the index of the control in the document
// otherwise.
if (parserInserted) {
KeyAppendString(NS_LITERAL_CSTRING("dp"), aKey);
KeyAppendInt(control->GetParserInsertedControlNumberForStateKey(),
aKey);
generatedUniqueKey = true;
} else {
KeyAppendString(NS_LITERAL_CSTRING("dn"), aKey);
int32_t index = htmlFormControls->IndexOf(aContent, true);
if (index > -1) {
KeyAppendInt(index, aKey);
generatedUniqueKey = true;
}
}
// Append the control name
nsAutoString name;
aContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::name,
name);
KeyAppendString(name, aKey);
}
}
}
if (!generatedUniqueKey) {
// Either we didn't have a form control or we aren't in an HTML document so
// we can't figure out form info. Append the tag name if it's an element
// to avoid restoring state for one type of element on another type.
if (aContent->IsElement()) {
KeyAppendString(nsDependentAtomString(aContent->NodeInfo()->NameAtom()),
aKey);
} else {
// Append a character that is not "d" or "f" to disambiguate from
// the case when we were a form control in an HTML document.
KeyAppendString(NS_LITERAL_CSTRING("o"), aKey);
}
// Now start at aContent and append the indices of it and all its ancestors
// in their containers. That should at least pin down its position in the
// DOM...
nsINode* parent = aContent->GetParentNode();
nsINode* content = aContent;
while (parent) {
KeyAppendInt(parent->ComputeIndexOf(content), aKey);
content = parent;
parent = content->GetParentNode();
}
}
}
// static
nsIPrincipal* nsContentUtils::SubjectPrincipal(JSContext* aCx) {
MOZ_ASSERT(NS_IsMainThread());
// As opposed to SubjectPrincipal(), we do in fact assume that
// we're in a realm here; anyone who calls this function in
// situations where that's not the case is doing it wrong.
JS::Realm* realm = js::GetContextRealm(aCx);
MOZ_ASSERT(realm);
JSPrincipals* principals = JS::GetRealmPrincipals(realm);
return nsJSPrincipals::get(principals);
}
// static
nsIPrincipal* nsContentUtils::SubjectPrincipal() {
MOZ_ASSERT(IsInitialized());
MOZ_ASSERT(NS_IsMainThread());
JSContext* cx = GetCurrentJSContext();
if (!cx) {
MOZ_CRASH(
"Accessing the Subject Principal without an AutoJSAPI on the stack is "
"forbidden");
}
JS::Realm* realm = js::GetContextRealm(cx);
// When an AutoJSAPI is instantiated, we are in a null realm until the
// first JSAutoRealm, which is kind of a purgatory as far as permissions
// go. It would be nice to just hard-abort if somebody does a security check
// in this purgatory zone, but that would be too fragile, since it could be
// triggered by random IsCallerChrome() checks 20-levels deep.
//
// So we want to return _something_ here - and definitely not the System
// Principal, since that would make an AutoJSAPI a very dangerous thing to
// instantiate.
//
// The natural thing to return is a null principal. Ideally, we'd return a
// different null principal each time, to avoid any unexpected interactions
// when the principal accidentally gets inherited somewhere. But
// SubjectPrincipal doesn't return strong references, so there's no way to
// sanely manage the lifetime of multiple null principals.
//
// So we use a singleton null principal. To avoid it being accidentally
// inherited and becoming a "real" subject or object principal, we do a
// release-mode assert during realm creation against using this principal on
// an actual global.
if (!realm) {
return sNullSubjectPrincipal;
}
return SubjectPrincipal(cx);
}
// static
nsIPrincipal* nsContentUtils::ObjectPrincipal(JSObject* aObj) {
MOZ_ASSERT(NS_IsMainThread());
#ifdef DEBUG
JS::AssertObjectBelongsToCurrentThread(aObj);
#endif
MOZ_DIAGNOSTIC_ASSERT(!js::IsCrossCompartmentWrapper(aObj));
JS::Realm* realm = js::GetNonCCWObjectRealm(aObj);
JSPrincipals* principals = JS::GetRealmPrincipals(realm);
return nsJSPrincipals::get(principals);
}
// static
nsresult nsContentUtils::NewURIWithDocumentCharset(nsIURI** aResult,
const nsAString& aSpec,
Document* aDocument,
nsIURI* aBaseURI) {
if (aDocument) {
return NS_NewURI(aResult, aSpec, aDocument->GetDocumentCharacterSet(),
aBaseURI);
}
return NS_NewURI(aResult, aSpec, nullptr, aBaseURI);
}
// static
bool nsContentUtils::IsNameWithDash(nsAtom* aName) {
// A valid custom element name is a sequence of characters name which
// must match the PotentialCustomElementName production:
// PotentialCustomElementName ::= [a-z] (PCENChar)* '-' (PCENChar)*
const char16_t* name = aName->GetUTF16String();
uint32_t len = aName->GetLength();
bool hasDash = false;
if (!len || name[0] < 'a' || name[0] > 'z') {
return false;
}
uint32_t i = 1;
while (i < len) {
if (i + 1 < len && NS_IS_SURROGATE_PAIR(name[i], name[i + 1])) {
// Merged two 16-bit surrogate pairs into code point.
char32_t code = SURROGATE_TO_UCS4(name[i], name[i + 1]);
if (code < 0x10000 || code > 0xEFFFF) {
return false;
}
i += 2;
} else {
if (name[i] == '-') {
hasDash = true;
}
if (name[i] != '-' && name[i] != '.' && name[i] != '_' &&
name[i] != 0xB7 && (name[i] < '0' || name[i] > '9') &&
(name[i] < 'a' || name[i] > 'z') &&
(name[i] < 0xC0 || name[i] > 0xD6) &&
(name[i] < 0xF8 || name[i] > 0x37D) &&
(name[i] < 0x37F || name[i] > 0x1FFF) &&
(name[i] < 0x200C || name[i] > 0x200D) &&
(name[i] < 0x203F || name[i] > 0x2040) &&
(name[i] < 0x2070 || name[i] > 0x218F) &&
(name[i] < 0x2C00 || name[i] > 0x2FEF) &&
(name[i] < 0x3001 || name[i] > 0xD7FF) &&
(name[i] < 0xF900 || name[i] > 0xFDCF) &&
(name[i] < 0xFDF0 || name[i] > 0xFFFD)) {
return false;
}
i++;
}
}
return hasDash;
}
// static
bool nsContentUtils::IsCustomElementName(nsAtom* aName, uint32_t aNameSpaceID) {
// Allow non-dashed names in XUL for XBL to Custom Element migrations.
if (aNameSpaceID == kNameSpaceID_XUL) {
return true;
}
bool hasDash = IsNameWithDash(aName);
if (!hasDash) {
return false;
}
// The custom element name must not be one of the following values:
// annotation-xml
// color-profile
// font-face
// font-face-src
// font-face-uri
// font-face-format
// font-face-name
// missing-glyph
return aName != nsGkAtoms::annotation_xml_ &&
aName != nsGkAtoms::colorProfile && aName != nsGkAtoms::font_face &&
aName != nsGkAtoms::font_face_src &&
aName != nsGkAtoms::font_face_uri &&
aName != nsGkAtoms::font_face_format &&
aName != nsGkAtoms::font_face_name && aName != nsGkAtoms::missingGlyph;
}
// static
nsresult nsContentUtils::CheckQName(const nsAString& aQualifiedName,
bool aNamespaceAware,
const char16_t** aColon) {
const char* colon = nullptr;
const char16_t* begin = aQualifiedName.BeginReading();
const char16_t* end = aQualifiedName.EndReading();
int result = MOZ_XMLCheckQName(reinterpret_cast<const char*>(begin),
reinterpret_cast<const char*>(end),
aNamespaceAware, &colon);
if (!result) {
if (aColon) {
*aColon = reinterpret_cast<const char16_t*>(colon);
}
return NS_OK;
}
return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
}
// static
nsresult nsContentUtils::SplitQName(const nsIContent* aNamespaceResolver,
const nsString& aQName, int32_t* aNamespace,
nsAtom** aLocalName) {
const char16_t* colon;
nsresult rv = nsContentUtils::CheckQName(aQName, true, &colon);
NS_ENSURE_SUCCESS(rv, rv);
if (colon) {
const char16_t* end;
aQName.EndReading(end);
nsAutoString nameSpace;
rv = aNamespaceResolver->LookupNamespaceURIInternal(
Substring(aQName.get(), colon), nameSpace);
NS_ENSURE_SUCCESS(rv, rv);
*aNamespace = NameSpaceManager()->GetNameSpaceID(
nameSpace, nsContentUtils::IsChromeDoc(aNamespaceResolver->OwnerDoc()));
if (*aNamespace == kNameSpaceID_Unknown) return NS_ERROR_FAILURE;
*aLocalName = NS_AtomizeMainThread(Substring(colon + 1, end)).take();
} else {
*aNamespace = kNameSpaceID_None;
*aLocalName = NS_AtomizeMainThread(aQName).take();
}
NS_ENSURE_TRUE(aLocalName, NS_ERROR_OUT_OF_MEMORY);
return NS_OK;
}
// static
nsresult nsContentUtils::GetNodeInfoFromQName(
const nsAString& aNamespaceURI, const nsAString& aQualifiedName,
nsNodeInfoManager* aNodeInfoManager, uint16_t aNodeType,
mozilla::dom::NodeInfo** aNodeInfo) {
const nsString& qName = PromiseFlatString(aQualifiedName);
const char16_t* colon;
nsresult rv = nsContentUtils::CheckQName(qName, true, &colon);
NS_ENSURE_SUCCESS(rv, rv);
int32_t nsID;
sNameSpaceManager->RegisterNameSpace(aNamespaceURI, nsID);
if (colon) {
const char16_t* end;
qName.EndReading(end);
RefPtr<nsAtom> prefix = NS_AtomizeMainThread(Substring(qName.get(), colon));
rv = aNodeInfoManager->GetNodeInfo(Substring(colon + 1, end), prefix, nsID,
aNodeType, aNodeInfo);
} else {
rv = aNodeInfoManager->GetNodeInfo(aQualifiedName, nullptr, nsID, aNodeType,
aNodeInfo);
}
NS_ENSURE_SUCCESS(rv, rv);
return nsContentUtils::IsValidNodeName((*aNodeInfo)->NameAtom(),
(*aNodeInfo)->GetPrefixAtom(),
(*aNodeInfo)->NamespaceID())
? NS_OK
: NS_ERROR_DOM_NAMESPACE_ERR;
}
// static
void nsContentUtils::SplitExpatName(const char16_t* aExpatName,
nsAtom** aPrefix, nsAtom** aLocalName,
int32_t* aNameSpaceID) {
/**
* Expat can send the following:
* localName
* namespaceURI<separator>localName
* namespaceURI<separator>localName<separator>prefix
*
* and we use 0xFFFF for the <separator>.
*
*/
const char16_t* uriEnd = nullptr;
const char16_t* nameEnd = nullptr;
const char16_t* pos;
for (pos = aExpatName; *pos; ++pos) {
if (*pos == 0xFFFF) {
if (uriEnd) {
nameEnd = pos;
} else {
uriEnd = pos;
}
}
}
const char16_t* nameStart;
if (uriEnd) {
if (sNameSpaceManager) {
sNameSpaceManager->RegisterNameSpace(
nsDependentSubstring(aExpatName, uriEnd), *aNameSpaceID);
} else {
*aNameSpaceID = kNameSpaceID_Unknown;
}
nameStart = (uriEnd + 1);
if (nameEnd) {
const char16_t* prefixStart = nameEnd + 1;
*aPrefix = NS_AtomizeMainThread(Substring(prefixStart, pos)).take();
} else {
nameEnd = pos;
*aPrefix = nullptr;
}
} else {
*aNameSpaceID = kNameSpaceID_None;
nameStart = aExpatName;
nameEnd = pos;
*aPrefix = nullptr;
}
*aLocalName = NS_AtomizeMainThread(Substring(nameStart, nameEnd)).take();
}
// static
PresShell* nsContentUtils::GetPresShellForContent(const nsIContent* aContent) {
Document* doc = aContent->GetComposedDoc();
if (!doc) {
return nullptr;
}
return doc->GetPresShell();
}
// static
nsPresContext* nsContentUtils::GetContextForContent(
const nsIContent* aContent) {
PresShell* presShell = GetPresShellForContent(aContent);
if (!presShell) {
return nullptr;
}
return presShell->GetPresContext();
}
// static
bool nsContentUtils::CanLoadImage(nsIURI* aURI, nsINode* aNode,
Document* aLoadingDocument,
nsIPrincipal* aLoadingPrincipal) {
MOZ_ASSERT(aURI, "Must have a URI");
MOZ_ASSERT(aLoadingDocument, "Must have a document");
MOZ_ASSERT(aLoadingPrincipal, "Must have a loading principal");
nsresult rv;
auto appType = nsIDocShell::APP_TYPE_UNKNOWN;
{
nsCOMPtr<nsIDocShellTreeItem> docShellTreeItem =
aLoadingDocument->GetDocShell();
if (docShellTreeItem) {
nsCOMPtr<nsIDocShellTreeItem> root;
docShellTreeItem->GetInProcessRootTreeItem(getter_AddRefs(root));
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(root));
if (docShell) {
appType = docShell->GetAppType();
}
}
}
if (appType != nsIDocShell::APP_TYPE_EDITOR) {
// Editor apps get special treatment here, editors can load images
// from anywhere. This allows editor to insert images from file://
// into documents that are being edited.
rv = sSecurityManager->CheckLoadURIWithPrincipal(
aLoadingPrincipal, aURI, nsIScriptSecurityManager::ALLOW_CHROME);
if (NS_FAILED(rv)) {
return false;
}
}
nsCOMPtr<nsILoadInfo> secCheckLoadInfo = new mozilla::net::LoadInfo(
aLoadingPrincipal,
aLoadingPrincipal, // triggering principal
aNode, nsILoadInfo::SEC_ONLY_FOR_EXPLICIT_CONTENTSEC_CHECK,
nsIContentPolicy::TYPE_INTERNAL_IMAGE);
int16_t decision = nsIContentPolicy::ACCEPT;
rv = NS_CheckContentLoadPolicy(aURI, secCheckLoadInfo,
EmptyCString(), // mime guess
&decision, GetContentPolicy());
return NS_FAILED(rv) ? false : NS_CP_ACCEPTED(decision);
}
// static
mozilla::OriginAttributes nsContentUtils::GetOriginAttributes(
Document* aDocument) {
if (!aDocument) {
return mozilla::OriginAttributes();
}
nsCOMPtr<nsILoadGroup> loadGroup = aDocument->GetDocumentLoadGroup();
if (loadGroup) {
return GetOriginAttributes(loadGroup);
}
mozilla::OriginAttributes attrs;
nsCOMPtr<nsIChannel> channel = aDocument->GetChannel();
if (channel) {
NS_GetOriginAttributes(channel, attrs);
}
return attrs;
}
// static
mozilla::OriginAttributes nsContentUtils::GetOriginAttributes(
nsILoadGroup* aLoadGroup) {
if (!aLoadGroup) {
return mozilla::OriginAttributes();
}
mozilla::OriginAttributes attrs;
nsCOMPtr<nsIInterfaceRequestor> callbacks;
aLoadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
if (callbacks) {
nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(callbacks);
if (loadContext) {
loadContext->GetOriginAttributes(attrs);
}
}
return attrs;
}
// static
bool nsContentUtils::IsInPrivateBrowsing(Document* aDoc) {
if (!aDoc) {
return false;
}
nsCOMPtr<nsILoadGroup> loadGroup = aDoc->GetDocumentLoadGroup();
if (loadGroup) {
nsCOMPtr<nsIInterfaceRequestor> callbacks;
loadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
if (callbacks) {
nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(callbacks);
if (loadContext) {
return loadContext->UsePrivateBrowsing();
}
}
}
nsCOMPtr<nsIChannel> channel = aDoc->GetChannel();
return channel && NS_UsePrivateBrowsing(channel);
}
// static
bool nsContentUtils::IsInPrivateBrowsing(nsILoadGroup* aLoadGroup) {
if (!aLoadGroup) {
return false;
}
bool isPrivate = false;
nsCOMPtr<nsIInterfaceRequestor> callbacks;
aLoadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
if (callbacks) {
nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(callbacks);
isPrivate = loadContext && loadContext->UsePrivateBrowsing();
}
return isPrivate;
}
bool nsContentUtils::DocumentInactiveForImageLoads(Document* aDocument) {
if (aDocument && !IsChromeDoc(aDocument) && !aDocument->IsResourceDoc()) {
nsCOMPtr<nsPIDOMWindowInner> win =
do_QueryInterface(aDocument->GetScopeObject());
return !win || !win->GetDocShell();
}
return false;
}
imgLoader* nsContentUtils::GetImgLoaderForDocument(Document* aDoc) {
NS_ENSURE_TRUE(!DocumentInactiveForImageLoads(aDoc), nullptr);
if (!aDoc) {
return imgLoader::NormalLoader();
}
bool isPrivate = IsInPrivateBrowsing(aDoc);
return isPrivate ? imgLoader::PrivateBrowsingLoader()
: imgLoader::NormalLoader();
}
// static
imgLoader* nsContentUtils::GetImgLoaderForChannel(nsIChannel* aChannel,
Document* aContext) {
NS_ENSURE_TRUE(!DocumentInactiveForImageLoads(aContext), nullptr);
if (!aChannel) {
return imgLoader::NormalLoader();
}
nsCOMPtr<nsILoadContext> context;
NS_QueryNotificationCallbacks(aChannel, context);
return context && context->UsePrivateBrowsing()
? imgLoader::PrivateBrowsingLoader()
: imgLoader::NormalLoader();
}
// static
bool nsContentUtils::IsImageInCache(nsIURI* aURI, Document* aDocument) {
imgILoader* loader = GetImgLoaderForDocument(aDocument);
nsCOMPtr<imgICache> cache = do_QueryInterface(loader);
// If something unexpected happened we return false, otherwise if props
// is set, the image is cached and we return true
nsCOMPtr<nsIProperties> props;
nsresult rv =
cache->FindEntryProperties(aURI, aDocument, getter_AddRefs(props));
return (NS_SUCCEEDED(rv) && props);
}
// static
int32_t nsContentUtils::CORSModeToLoadImageFlags(mozilla::CORSMode aMode) {
switch (aMode) {
case CORS_ANONYMOUS:
return imgILoader::LOAD_CORS_ANONYMOUS;
case CORS_USE_CREDENTIALS:
return imgILoader::LOAD_CORS_USE_CREDENTIALS;
default:
return 0;
}
}
// static
nsresult nsContentUtils::LoadImage(
nsIURI* aURI, nsINode* aContext, Document* aLoadingDocument,
nsIPrincipal* aLoadingPrincipal, uint64_t aRequestContextID,
nsIReferrerInfo* aReferrerInfo, imgINotificationObserver* aObserver,
int32_t aLoadFlags, const nsAString& initiatorType,
imgRequestProxy** aRequest, uint32_t aContentPolicyType,
bool aUseUrgentStartForChannel) {
MOZ_ASSERT(aURI, "Must have a URI");
MOZ_ASSERT(aContext, "Must have a context");
MOZ_ASSERT(aLoadingDocument, "Must have a document");
MOZ_ASSERT(aLoadingPrincipal, "Must have a principal");
MOZ_ASSERT(aRequest, "Null out param");
imgLoader* imgLoader = GetImgLoaderForDocument(aLoadingDocument);
if (!imgLoader) {
// nothing we can do here
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsILoadGroup> loadGroup = aLoadingDocument->GetDocumentLoadGroup();
nsIURI* documentURI = aLoadingDocument->GetDocumentURI();
NS_ASSERTION(loadGroup || IsFontTableURI(documentURI),
"Could not get loadgroup; onload may fire too early");
// XXXbz using "documentURI" for the initialDocumentURI is not quite
// right, but the best we can do here...
return imgLoader->LoadImage(aURI, /* uri to load */
documentURI, /* initialDocumentURI */
aReferrerInfo, /* referrerInfo */
aLoadingPrincipal, /* loading principal */
aRequestContextID, /* request context ID */
loadGroup, /* loadgroup */
aObserver, /* imgINotificationObserver */
aContext, /* loading context */
aLoadingDocument, /* uniquification key */
aLoadFlags, /* load flags */
nullptr, /* cache key */
aContentPolicyType, /* content policy type */
initiatorType, /* the load initiator */
aUseUrgentStartForChannel, /* urgent-start flag */
aRequest);
}
// static
already_AddRefed<imgIContainer> nsContentUtils::GetImageFromContent(
nsIImageLoadingContent* aContent, imgIRequest** aRequest) {
if (aRequest) {
*aRequest = nullptr;
}
NS_ENSURE_TRUE(aContent, nullptr);
nsCOMPtr<imgIRequest> imgRequest;
aContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
getter_AddRefs(imgRequest));
if (!imgRequest) {
return nullptr;
}
nsCOMPtr<imgIContainer> imgContainer;
imgRequest->GetImage(getter_AddRefs(imgContainer));
if (!imgContainer) {
return nullptr;
}
if (aRequest) {
// If the consumer wants the request, verify it has actually loaded
// successfully.
uint32_t imgStatus;
imgRequest->GetImageStatus(&imgStatus);
if (imgStatus & imgIRequest::STATUS_FRAME_COMPLETE &&
!(imgStatus & imgIRequest::STATUS_ERROR)) {
imgRequest.swap(*aRequest);
}
}
return imgContainer.forget();
}
// static
already_AddRefed<imgRequestProxy> nsContentUtils::GetStaticRequest(
Document* aLoadingDocument, imgRequestProxy* aRequest) {
NS_ENSURE_TRUE(aRequest, nullptr);
RefPtr<imgRequestProxy> retval;
aRequest->GetStaticRequest(aLoadingDocument, getter_AddRefs(retval));
return retval.forget();
}
// static
bool nsContentUtils::ContentIsDraggable(nsIContent* aContent) {
MOZ_ASSERT(aContent);
if (auto htmlElement = nsGenericHTMLElement::FromNode(aContent)) {
if (htmlElement->Draggable()) {
return true;
}
if (htmlElement->AttrValueIs(kNameSpaceID_None, nsGkAtoms::draggable,
nsGkAtoms::_false, eIgnoreCase)) {
return false;
}
}
// special handling for content area image and link dragging
return IsDraggableImage(aContent) || IsDraggableLink(aContent);
}
// static
bool nsContentUtils::IsDraggableImage(nsIContent* aContent) {
MOZ_ASSERT(aContent, "Must have content node to test");
nsCOMPtr<nsIImageLoadingContent> imageContent(do_QueryInterface(aContent));
if (!imageContent) {
return false;
}
nsCOMPtr<imgIRequest> imgRequest;
imageContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
getter_AddRefs(imgRequest));
// XXXbz It may be draggable even if the request resulted in an error. Why?
// Not sure; that's what the old nsContentAreaDragDrop/nsFrame code did.
return imgRequest != nullptr;
}
// static
bool nsContentUtils::IsDraggableLink(const nsIContent* aContent) {
nsCOMPtr<nsIURI> absURI;
return aContent->IsLink(getter_AddRefs(absURI));
}
// static
nsresult nsContentUtils::QNameChanged(mozilla::dom::NodeInfo* aNodeInfo,
nsAtom* aName,
mozilla::dom::NodeInfo** aResult) {
nsNodeInfoManager* niMgr = aNodeInfo->NodeInfoManager();
*aResult = niMgr
->GetNodeInfo(aName, nullptr, aNodeInfo->NamespaceID(),
aNodeInfo->NodeType(), aNodeInfo->GetExtraName())
.take();
return NS_OK;
}
static bool TestSitePerm(nsIPrincipal* aPrincipal, const nsACString& aType,
uint32_t aPerm, bool aExactHostMatch) {
if (!aPrincipal) {
// We always deny (i.e. don't allow) the permission if we don't have a
// principal.
return aPerm != nsIPermissionManager::ALLOW_ACTION;
}
nsCOMPtr<nsIPermissionManager> permMgr = services::GetPermissionManager();
NS_ENSURE_TRUE(permMgr, false);
uint32_t perm;
nsresult rv;
if (aExactHostMatch) {
rv = permMgr->TestExactPermissionFromPrincipal(aPrincipal, aType, &perm);
} else {
rv = permMgr->TestPermissionFromPrincipal(aPrincipal, aType, &perm);
}
NS_ENSURE_SUCCESS(rv, false);
return perm == aPerm;
}
bool nsContentUtils::IsSitePermAllow(nsIPrincipal* aPrincipal,
const nsACString& aType) {
return TestSitePerm(aPrincipal, aType, nsIPermissionManager::ALLOW_ACTION,
false);
}
bool nsContentUtils::IsSitePermDeny(nsIPrincipal* aPrincipal,
const nsACString& aType) {
return TestSitePerm(aPrincipal, aType, nsIPermissionManager::DENY_ACTION,
false);
}
bool nsContentUtils::IsExactSitePermAllow(nsIPrincipal* aPrincipal,
const nsACString& aType) {
return TestSitePerm(aPrincipal, aType, nsIPermissionManager::ALLOW_ACTION,
true);
}
bool nsContentUtils::IsExactSitePermDeny(nsIPrincipal* aPrincipal,
const nsACString& aType) {
return TestSitePerm(aPrincipal, aType, nsIPermissionManager::DENY_ACTION,
true);
}
static const char* gEventNames[] = {"event"};
static const char* gSVGEventNames[] = {"evt"};
// for b/w compat, the first name to onerror is still 'event', even though it
// is actually the error message
static const char* gOnErrorNames[] = {"event", "source", "lineno", "colno",
"error"};
// static
void nsContentUtils::GetEventArgNames(int32_t aNameSpaceID, nsAtom* aEventName,
bool aIsForWindow, uint32_t* aArgCount,
const char*** aArgArray) {
#define SET_EVENT_ARG_NAMES(names) \
*aArgCount = sizeof(names) / sizeof(names[0]); \
*aArgArray = names;
// JSEventHandler is what does the arg magic for onerror, and it does
// not seem to take the namespace into account. So we let onerror in all
// namespaces get the 3 arg names.
if (aEventName == nsGkAtoms::onerror && aIsForWindow) {
SET_EVENT_ARG_NAMES(gOnErrorNames);
} else if (aNameSpaceID == kNameSpaceID_SVG) {
SET_EVENT_ARG_NAMES(gSVGEventNames);
} else {
SET_EVENT_ARG_NAMES(gEventNames);
}
}
// Note: The list of content bundles in nsStringBundle.cpp should be updated
// whenever entries are added or removed from this list.
static const char* gPropertiesFiles[nsContentUtils::PropertiesFile_COUNT] = {
// Must line up with the enum values in |PropertiesFile| enum.
"chrome://global/locale/css.properties",
"chrome://global/locale/xul.properties",
"chrome://global/locale/layout_errors.properties",
"chrome://global/locale/layout/HtmlForm.properties",
"chrome://global/locale/printing.properties",
"chrome://global/locale/dom/dom.properties",
"chrome://global/locale/layout/htmlparser.properties",
"chrome://global/locale/svg/svg.properties",
"chrome://branding/locale/brand.properties",
"chrome://global/locale/commonDialogs.properties",
"chrome://global/locale/mathml/mathml.properties",
"chrome://global/locale/security/security.properties",
"chrome://necko/locale/necko.properties",
"resource://gre/res/locale/layout/HtmlForm.properties",
"resource://gre/res/locale/dom/dom.properties"};
/* static */
nsresult nsContentUtils::EnsureStringBundle(PropertiesFile aFile) {
if (!sStringBundles[aFile]) {
if (!sStringBundleService) {
nsresult rv =
CallGetService(NS_STRINGBUNDLE_CONTRACTID, &sStringBundleService);
NS_ENSURE_SUCCESS(rv, rv);
}
nsIStringBundle* bundle;
nsresult rv =
sStringBundleService->CreateBundle(gPropertiesFiles[aFile], &bundle);
NS_ENSURE_SUCCESS(rv, rv);
sStringBundles[aFile] = bundle; // transfer ownership
}
return NS_OK;
}
/* static */
void nsContentUtils::AsyncPrecreateStringBundles() {
// We only ever want to pre-create bundles in the parent process.
//
// All nsContentUtils bundles are shared between the parent and child
// precesses, and the shared memory regions that back them *must* be created
// in the parent, and then sent to all children.
//
// If we attempt to create a bundle in the child before its memory region is
// available, we need to create a temporary non-shared bundle, and later
// replace that with the shared memory copy. So attempting to pre-load in the
// child is wasteful and unnecessary.
MOZ_ASSERT(XRE_IsParentProcess());
for (uint32_t bundleIndex = 0; bundleIndex < PropertiesFile_COUNT;
++bundleIndex) {
nsresult rv = NS_DispatchToCurrentThreadQueue(
NS_NewRunnableFunction("AsyncPrecreateStringBundles",
[bundleIndex]() {
PropertiesFile file =
static_cast<PropertiesFile>(bundleIndex);
EnsureStringBundle(file);
nsIStringBundle* bundle = sStringBundles[file];
bundle->AsyncPreload();
}),
EventQueuePriority::Idle);
Unused << NS_WARN_IF(NS_FAILED(rv));
}
}
/* static */
bool nsContentUtils::SpoofLocaleEnglish() {
// 0 - will prompt
// 1 - don't spoof
// 2 - spoof
return StaticPrefs::privacy_spoof_english() == 2;
}
static nsContentUtils::PropertiesFile GetMaybeSpoofedPropertiesFile(
nsContentUtils::PropertiesFile aFile, const char* aKey,
Document* aDocument) {
// When we spoof English, use en-US properties in strings that are accessible
// by content.
bool spoofLocale = nsContentUtils::SpoofLocaleEnglish() &&
(!aDocument || !aDocument->AllowsL10n());
if (spoofLocale) {
switch (aFile) {
case nsContentUtils::eFORMS_PROPERTIES:
return nsContentUtils::eFORMS_PROPERTIES_en_US;
case nsContentUtils::eDOM_PROPERTIES:
return nsContentUtils::eDOM_PROPERTIES_en_US;
default:
break;
}
}
return aFile;
}
/* static */
nsresult nsContentUtils::GetMaybeLocalizedString(PropertiesFile aFile,
const char* aKey,
Document* aDocument,
nsAString& aResult) {
return GetLocalizedString(
GetMaybeSpoofedPropertiesFile(aFile, aKey, aDocument), aKey, aResult);
}
/* static */
nsresult nsContentUtils::GetLocalizedString(PropertiesFile aFile,
const char* aKey,
nsAString& aResult) {
nsresult rv = EnsureStringBundle(aFile);
NS_ENSURE_SUCCESS(rv, rv);
nsIStringBundle* bundle = sStringBundles[aFile];
return bundle->GetStringFromName(aKey, aResult);
}
/* static */
nsresult nsContentUtils::FormatMaybeLocalizedString(
PropertiesFile aFile, const char* aKey, Document* aDocument,
const nsTArray<nsString>& aParams, nsAString& aResult) {
return FormatLocalizedString(
GetMaybeSpoofedPropertiesFile(aFile, aKey, aDocument), aKey, aParams,
aResult);
}
/* static */
nsresult nsContentUtils::FormatLocalizedString(
PropertiesFile aFile, const char* aKey, const nsTArray<nsString>& aParams,
nsAString& aResult) {
nsresult rv = EnsureStringBundle(aFile);
NS_ENSURE_SUCCESS(rv, rv);
nsIStringBundle* bundle = sStringBundles[aFile];
if (aParams.IsEmpty()) {
return bundle->GetStringFromName(aKey, aResult);
}
return bundle->FormatStringFromName(aKey, aParams, aResult);
}
/* static */
void nsContentUtils::LogSimpleConsoleError(const nsAString& aErrorText,
const char* classification,
bool aFromPrivateWindow,
bool aFromChromeContext) {
nsCOMPtr<nsIScriptError> scriptError =
do_CreateInstance(NS_SCRIPTERROR_CONTRACTID);
if (scriptError) {
nsCOMPtr<nsIConsoleService> console =
do_GetService(NS_CONSOLESERVICE_CONTRACTID);
if (console && NS_SUCCEEDED(scriptError->Init(
aErrorText, EmptyString(), EmptyString(), 0, 0,
nsIScriptError::errorFlag, classification,
aFromPrivateWindow, aFromChromeContext))) {
console->LogMessage(scriptError);
}
}
}
/* static */
nsresult nsContentUtils::ReportToConsole(
uint32_t aErrorFlags, const nsACString& aCategory,
const Document* aDocument, PropertiesFile aFile, const char* aMessageName,
const nsTArray<nsString>& aParams, nsIURI* aURI,
const nsString& aSourceLine, uint32_t aLineNumber, uint32_t aColumnNumber) {
nsresult rv;
nsAutoString errorText;
if (!aParams.IsEmpty()) {
rv = FormatLocalizedString(aFile, aMessageName, aParams, errorText);
} else {
rv = GetLocalizedString(aFile, aMessageName, errorText);
}
NS_ENSURE_SUCCESS(rv, rv);
return ReportToConsoleNonLocalized(errorText, aErrorFlags, aCategory,
aDocument, aURI, aSourceLine, aLineNumber,
aColumnNumber);
}
/* static */
void nsContentUtils::ReportEmptyGetElementByIdArg(const Document* aDoc) {
ReportToConsole(nsIScriptError::warningFlag, NS_LITERAL_CSTRING("DOM"), aDoc,
nsContentUtils::eDOM_PROPERTIES, "EmptyGetElementByIdParam");
}
/* static */
nsresult nsContentUtils::ReportToConsoleNonLocalized(
const nsAString& aErrorText, uint32_t aErrorFlags,
const nsACString& aCategory, const Document* aDocument, nsIURI* aURI,
const nsString& aSourceLine, uint32_t aLineNumber, uint32_t aColumnNumber,
MissingErrorLocationMode aLocationMode) {
uint64_t innerWindowID = 0;
if (aDocument) {
if (!aURI) {
aURI = aDocument->GetDocumentURI();
}
innerWindowID = aDocument->InnerWindowID();
}
return ReportToConsoleByWindowID(aErrorText, aErrorFlags, aCategory,
innerWindowID, aURI, aSourceLine,
aLineNumber, aColumnNumber, aLocationMode);
}
/* static */
nsresult nsContentUtils::ReportToConsoleByWindowID(
const nsAString& aErrorText, uint32_t aErrorFlags,
const nsACString& aCategory, uint64_t aInnerWindowID, nsIURI* aURI,
const nsString& aSourceLine, uint32_t aLineNumber, uint32_t aColumnNumber,
MissingErrorLocationMode aLocationMode) {
nsresult rv;
if (!sConsoleService) { // only need to bother null-checking here
rv = CallGetService(NS_CONSOLESERVICE_CONTRACTID, &sConsoleService);
NS_ENSURE_SUCCESS(rv, rv);
}
nsAutoString spec;
if (!aLineNumber && aLocationMode == eUSE_CALLING_LOCATION) {
JSContext* cx = GetCurrentJSContext();
if (cx) {
nsJSUtils::GetCallingLocation(cx, spec, &aLineNumber, &aColumnNumber);
}
}
nsCOMPtr<nsIScriptError> errorObject =
do_CreateInstance(NS_SCRIPTERROR_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
if (!spec.IsEmpty()) {
rv = errorObject->InitWithWindowID(aErrorText,
spec, // file name
aSourceLine, aLineNumber, aColumnNumber,
aErrorFlags, aCategory, aInnerWindowID);
} else {
rv = errorObject->InitWithSourceURI(aErrorText, aURI, aSourceLine,
aLineNumber, aColumnNumber, aErrorFlags,
aCategory, aInnerWindowID);
}
NS_ENSURE_SUCCESS(rv, rv);
return sConsoleService->LogMessage(errorObject);
}
void nsContentUtils::LogMessageToConsole(const char* aMsg) {
if (!sConsoleService) { // only need to bother null-checking here
CallGetService(NS_CONSOLESERVICE_CONTRACTID, &sConsoleService);
if (!sConsoleService) {
return;
}
}
sConsoleService->LogStringMessage(NS_ConvertUTF8toUTF16(aMsg).get());
}
bool nsContentUtils::IsChildOfSameType(Document* aDoc) {
nsCOMPtr<nsIDocShellTreeItem> docShellAsItem(aDoc->GetDocShell());
nsCOMPtr<nsIDocShellTreeItem> sameTypeParent;
if (docShellAsItem) {
docShellAsItem->GetInProcessSameTypeParent(getter_AddRefs(sameTypeParent));
}
return sameTypeParent != nullptr;
}
bool nsContentUtils::IsPlainTextType(const nsACString& aContentType) {
// NOTE: if you add a type here, add it to the CONTENTDLF_CATEGORIES
// define in nsContentDLF.h as well.
return aContentType.EqualsLiteral(TEXT_PLAIN) ||
aContentType.EqualsLiteral(TEXT_CSS) ||
aContentType.EqualsLiteral(TEXT_CACHE_MANIFEST) ||
aContentType.EqualsLiteral(TEXT_VTT) ||
aContentType.EqualsLiteral(APPLICATION_JAVASCRIPT) ||
aContentType.EqualsLiteral(APPLICATION_XJAVASCRIPT) ||
aContentType.EqualsLiteral(TEXT_ECMASCRIPT) ||
aContentType.EqualsLiteral(APPLICATION_ECMASCRIPT) ||
aContentType.EqualsLiteral(TEXT_JAVASCRIPT) ||
aContentType.EqualsLiteral(APPLICATION_JSON) ||
aContentType.EqualsLiteral(TEXT_JSON);
}
bool nsContentUtils::IsUtf8OnlyPlainTextType(const nsACString& aContentType) {
// NOTE: This must be a subset of the list in IsPlainTextType().
return aContentType.EqualsLiteral(TEXT_CACHE_MANIFEST) ||
aContentType.EqualsLiteral(APPLICATION_JSON) ||
aContentType.EqualsLiteral(TEXT_JSON) ||
aContentType.EqualsLiteral(TEXT_VTT);
}
// static
nsIContentPolicy* nsContentUtils::GetContentPolicy() {
if (!sTriedToGetContentPolicy) {
CallGetService(NS_CONTENTPOLICY_CONTRACTID, &sContentPolicyService);
// It's OK to not have a content policy service
sTriedToGetContentPolicy = true;
}
return sContentPolicyService;
}
// static
bool nsContentUtils::IsEventAttributeName(nsAtom* aName, int32_t aType) {
const char16_t* name = aName->GetUTF16String();
if (name[0] != 'o' || name[1] != 'n' ||
(aName == nsGkAtoms::onformdata &&
!mozilla::StaticPrefs::dom_formdata_event_enabled())) {
return false;
}
EventNameMapping mapping;
return (sAtomEventTable->Get(aName, &mapping) && mapping.mType & aType);
}
// static
EventMessage nsContentUtils::GetEventMessage(nsAtom* aName) {
MOZ_ASSERT(NS_IsMainThread(), "sAtomEventTable is not threadsafe");
if (aName) {
EventNameMapping mapping;
if (sAtomEventTable->Get(aName, &mapping)) {
return mapping.mMessage;
}
}
return eUnidentifiedEvent;
}
// static
mozilla::EventClassID nsContentUtils::GetEventClassID(const nsAString& aName) {
EventNameMapping mapping;
if (sStringEventTable->Get(aName, &mapping)) return mapping.mEventClassID;
return eBasicEventClass;
}
nsAtom* nsContentUtils::GetEventMessageAndAtom(
const nsAString& aName, mozilla::EventClassID aEventClassID,
EventMessage* aEventMessage) {
MOZ_ASSERT(NS_IsMainThread(), "Our hashtables are not threadsafe");
EventNameMapping mapping;
if (sStringEventTable->Get(aName, &mapping)) {
*aEventMessage = mapping.mEventClassID == aEventClassID
? mapping.mMessage
: eUnidentifiedEvent;
return mapping.mAtom;
}
// If we have cached lots of user defined event names, clear some of them.
if (sUserDefinedEvents->Length() > 127) {
while (sUserDefinedEvents->Length() > 64) {
nsAtom* first = sUserDefinedEvents->ElementAt(0);
sStringEventTable->Remove(Substring(nsDependentAtomString(first), 2));
sUserDefinedEvents->RemoveElementAt(0);
}
}
*aEventMessage = eUnidentifiedEvent;
RefPtr<nsAtom> atom = NS_AtomizeMainThread(NS_LITERAL_STRING("on") + aName);
sUserDefinedEvents->AppendElement(atom);
mapping.mAtom = atom;
mapping.mMessage = eUnidentifiedEvent;
mapping.mType = EventNameType_None;
mapping.mEventClassID = eBasicEventClass;
// This is a slow hashtable call, but at least we cache the result for the
// following calls. Because GetEventMessageAndAtomForListener utilizes
// sStringEventTable, it needs to know in which cases sStringEventTable
// doesn't contain the information it needs so that it can use
// sAtomEventTable instead.
mapping.mMaybeSpecialSVGorSMILEvent =
GetEventMessage(atom) != eUnidentifiedEvent;
sStringEventTable->Put(aName, mapping);
return mapping.mAtom;
}
// static
EventMessage nsContentUtils::GetEventMessageAndAtomForListener(
const nsAString& aName, nsAtom** aOnName) {
MOZ_ASSERT(NS_IsMainThread(), "Our hashtables are not threadsafe");
// Because of SVG/SMIL sStringEventTable contains a subset of the event names
// comparing to the sAtomEventTable. However, usually sStringEventTable
// contains the information we need, so in order to reduce hashtable
// lookups, start from it.
EventNameMapping mapping;
EventMessage msg = eUnidentifiedEvent;
RefPtr<nsAtom> atom;
if (sStringEventTable->Get(aName, &mapping)) {
if (mapping.mMaybeSpecialSVGorSMILEvent) {
// Try the atom version so that we should get the right message for
// SVG/SMIL.
atom = NS_AtomizeMainThread(NS_LITERAL_STRING("on") + aName);
msg = GetEventMessage(atom);
} else {
atom = mapping.mAtom;
msg = mapping.mMessage;
}
atom.forget(aOnName);
return msg;
}
// GetEventMessageAndAtom will cache the event type for the future usage...
GetEventMessageAndAtom(aName, eBasicEventClass, &msg);
// ...and then call this method recursively to get the message and atom from
// now updated sStringEventTable.
return GetEventMessageAndAtomForListener(aName, aOnName);
}
static nsresult GetEventAndTarget(Document* aDoc, nsISupports* aTarget,
const nsAString& aEventName,
CanBubble aCanBubble, Cancelable aCancelable,
Composed aComposed, Trusted aTrusted,
Event** aEvent, EventTarget** aTargetOut) {
nsCOMPtr<EventTarget> target(do_QueryInterface(aTarget));
NS_ENSURE_TRUE(aDoc && target, NS_ERROR_INVALID_ARG);
ErrorResult err;
RefPtr<Event> event =
aDoc->CreateEvent(NS_LITERAL_STRING("Events"), CallerType::System, err);
if (NS_WARN_IF(err.Failed())) {
return err.StealNSResult();
}
event->InitEvent(aEventName, aCanBubble, aCancelable, aComposed);
event->SetTrusted(aTrusted == Trusted::eYes);
event->SetTarget(target);
event.forget(aEvent);
target.forget(aTargetOut);
return NS_OK;
}
// static
nsresult nsContentUtils::DispatchTrustedEvent(
Document* aDoc, nsISupports* aTarget, const nsAString& aEventName,
CanBubble aCanBubble, Cancelable aCancelable, Composed aComposed,
bool* aDefaultAction) {
MOZ_ASSERT(!aEventName.EqualsLiteral("input"),
"Use DispatchInputEvent() instead");
return DispatchEvent(aDoc, aTarget, aEventName, aCanBubble, aCancelable,
aComposed, Trusted::eYes, aDefaultAction);
}
// static
nsresult nsContentUtils::DispatchUntrustedEvent(
Document* aDoc, nsISupports* aTarget, const nsAString& aEventName,
CanBubble aCanBubble, Cancelable aCancelable, bool* aDefaultAction) {
return DispatchEvent(aDoc, aTarget, aEventName, aCanBubble, aCancelable,
Composed::eDefault, Trusted::eNo, aDefaultAction);
}
// static
nsresult nsContentUtils::DispatchEvent(Document* aDoc, nsISupports* aTarget,
const nsAString& aEventName,
CanBubble aCanBubble,
Cancelable aCancelable,
Composed aComposed, Trusted aTrusted,
bool* aDefaultAction,
ChromeOnlyDispatch aOnlyChromeDispatch) {
RefPtr<Event> event;
nsCOMPtr<EventTarget> target;
nsresult rv = GetEventAndTarget(
aDoc, aTarget, aEventName, aCanBubble, aCancelable, aComposed, aTrusted,
getter_AddRefs(event), getter_AddRefs(target));
NS_ENSURE_SUCCESS(rv, rv);
event->WidgetEventPtr()->mFlags.mOnlyChromeDispatch =
aOnlyChromeDispatch == ChromeOnlyDispatch::eYes;
ErrorResult err;
bool doDefault = target->DispatchEvent(*event, CallerType::System, err);
if (aDefaultAction) {
*aDefaultAction = doDefault;
}
return err.StealNSResult();
}
// static
nsresult nsContentUtils::DispatchEvent(Document* aDoc, nsISupports* aTarget,
WidgetEvent& aEvent,
EventMessage aEventMessage,
CanBubble aCanBubble,
Cancelable aCancelable, Trusted aTrusted,
bool* aDefaultAction,
ChromeOnlyDispatch aOnlyChromeDispatch) {
MOZ_ASSERT_IF(aOnlyChromeDispatch == ChromeOnlyDispatch::eYes,
aTrusted == Trusted::eYes);
nsCOMPtr<EventTarget> target(do_QueryInterface(aTarget));
aEvent.mTime = PR_Now();
aEvent.mSpecifiedEventType = GetEventTypeFromMessage(aEventMessage);
aEvent.SetDefaultComposed();
aEvent.SetDefaultComposedInNativeAnonymousContent();
aEvent.mFlags.mBubbles = aCanBubble == CanBubble::eYes;
aEvent.mFlags.mCancelable = aCancelable == Cancelable::eYes;
aEvent.mFlags.mOnlyChromeDispatch =
aOnlyChromeDispatch == ChromeOnlyDispatch::eYes;
aEvent.mTarget = target;
nsEventStatus status = nsEventStatus_eIgnore;
nsresult rv = EventDispatcher::DispatchDOMEvent(target, &aEvent, nullptr,
nullptr, &status);
if (aDefaultAction) {
*aDefaultAction = (status != nsEventStatus_eConsumeNoDefault);
}
return rv;
}
nsContentUtils::InputEventOptions::InputEventOptions(
DataTransfer* aDataTransfer)
: mDataTransfer(aDataTransfer) {
MOZ_ASSERT(mDataTransfer);
MOZ_ASSERT(mDataTransfer->IsReadOnly());
}
// static
nsresult nsContentUtils::DispatchInputEvent(Element* aEventTargetElement,
EditorInputType aEditorInputType,
TextEditor* aTextEditor,
const InputEventOptions& aOptions) {
if (NS_WARN_IF(!aEventTargetElement)) {
return NS_ERROR_INVALID_ARG;
}
// If this is called from editor, the instance should be set to aTextEditor.
// Otherwise, we need to look for an editor for aEventTargetElement.
// However, we don't need to do it for HTMLEditor since nobody shouldn't
// dispatch "input" event for HTMLEditor except HTMLEditor itself.
bool useInputEvent = false;
if (aTextEditor) {
useInputEvent = true;
} else if (HTMLTextAreaElement* textAreaElement =
HTMLTextAreaElement::FromNode(aEventTargetElement)) {
aTextEditor = textAreaElement->GetTextEditorWithoutCreation();
useInputEvent = true;
} else if (HTMLInputElement* inputElement =
HTMLInputElement::FromNode(aEventTargetElement)) {
if (inputElement->IsInputEventTarget()) {
aTextEditor = inputElement->GetTextEditorWithoutCreation();
useInputEvent = true;
}
}
#ifdef DEBUG
else {
MOZ_ASSERT(!aEventTargetElement->IsTextControlElement(),
"The event target may have editor, but we've not known it yet.");
}
#endif // #ifdef DEBUG
// If the event target is an <input> element, we need to update
// validationMessage value before dispatching "input" event because
// "input" event listener may need to check it.
HTMLInputElement* inputElement =
HTMLInputElement::FromNode(aEventTargetElement);
if (inputElement) {
MOZ_KnownLive(inputElement)->MaybeUpdateAllValidityStates(true);
// XXX Should we stop dispatching "input" event if the target is removed
// from the DOM tree?
}
if (!useInputEvent) {
MOZ_ASSERT(aEditorInputType == EditorInputType::eUnknown);
// Dispatch "input" event with Event instance.
WidgetEvent widgetEvent(true, eUnidentifiedEvent);
widgetEvent.mSpecifiedEventType = nsGkAtoms::oninput;
widgetEvent.mFlags.mCancelable = false;
widgetEvent.mFlags.mComposed = true;
// Using same time as nsContentUtils::DispatchEvent() for backward
// compatibility.
widgetEvent.mTime = PR_Now();
(new AsyncEventDispatcher(aEventTargetElement, widgetEvent))
->RunDOMEventWhenSafe();
return NS_OK;
}
nsCOMPtr<nsIWidget> widget;
if (aTextEditor) {
widget = aTextEditor->GetWidget();
if (NS_WARN_IF(!widget)) {
return NS_ERROR_FAILURE;
}
} else {
Document* document = aEventTargetElement->OwnerDoc();
if (NS_WARN_IF(!document)) {
return NS_ERROR_FAILURE;
}
// If we're running xpcshell tests, we fail to get presShell here.
// Even in such case, we need to dispatch "input" event without widget.
PresShell* presShell = document->GetPresShell();
if (presShell) {
nsPresContext* presContext = presShell->GetPresContext();
if (NS_WARN_IF(!presContext)) {
return NS_ERROR_FAILURE;
}
widget = presContext->GetRootWidget();
if (NS_WARN_IF(!widget)) {
return NS_ERROR_FAILURE;
}
}
}
// Dispatch "input" event with InputEvent instance.
InternalEditorInputEvent inputEvent(true, eEditorInput, widget);
// Using same time as old event dispatcher in EditorBase for backward
// compatibility.
inputEvent.mTime = static_cast<uint64_t>(PR_Now() / 1000);
// If there is an editor, set isComposing to true when it has composition.
// Note that EditorBase::IsIMEComposing() may return false even when we
// need to set it to true.
// Otherwise, i.e., editor hasn't been created for the element yet,
// we should set isComposing to false since the element can never has
// composition without editor.
inputEvent.mIsComposing =
aTextEditor ? !!aTextEditor->GetComposition() : false;
if (!aTextEditor || !aTextEditor->AsHTMLEditor()) {
if (IsDataAvailableOnTextEditor(aEditorInputType)) {
inputEvent.mData = aOptions.mData;
MOZ_ASSERT(!inputEvent.mData.IsVoid(),
"inputEvent.mData shouldn't be void");
}
#ifdef DEBUG
else {
MOZ_ASSERT(inputEvent.mData.IsVoid(), "inputEvent.mData should be void");
}
#endif // #ifdef DEBUG
} else {
MOZ_ASSERT(aTextEditor->AsHTMLEditor());
if (IsDataAvailableOnHTMLEditor(aEditorInputType)) {
inputEvent.mData = aOptions.mData;
MOZ_ASSERT(!inputEvent.mData.IsVoid(),
"inputEvent.mData shouldn't be void");
} else {
MOZ_ASSERT(inputEvent.mData.IsVoid(), "inputEvent.mData should be void");
if (IsDataTransferAvailableOnHTMLEditor(aEditorInputType)) {
inputEvent.mDataTransfer = aOptions.mDataTransfer;
MOZ_ASSERT(inputEvent.mDataTransfer,
"inputEvent.mDataTransfer shouldn't be nullptr");
MOZ_ASSERT(inputEvent.mDataTransfer->IsReadOnly(),
"inputEvent.mDataTransfer should be read only");
}
#ifdef DEBUG
else {
MOZ_ASSERT(!inputEvent.mDataTransfer,
"inputEvent.mDataTransfer should be nullptr");
}
#endif // #ifdef DEBUG
}
}
inputEvent.mInputType = aEditorInputType;
(new AsyncEventDispatcher(aEventTargetElement, inputEvent))
->RunDOMEventWhenSafe();
return NS_OK;
}
nsresult nsContentUtils::DispatchChromeEvent(
Document* aDoc, nsISupports* aTarget, const nsAString& aEventName,
CanBubble aCanBubble, Cancelable aCancelable, bool* aDefaultAction) {
RefPtr<Event> event;
nsCOMPtr<EventTarget> target;
nsresult rv = GetEventAndTarget(
aDoc, aTarget, aEventName, aCanBubble, aCancelable, Composed::eDefault,
Trusted::eYes, getter_AddRefs(event), getter_AddRefs(target));
NS_ENSURE_SUCCESS(rv, rv);
NS_ASSERTION(aDoc, "GetEventAndTarget lied?");
if (!aDoc->GetWindow()) return NS_ERROR_INVALID_ARG;
EventTarget* piTarget = aDoc->GetWindow()->GetParentTarget();
if (!piTarget) return NS_ERROR_INVALID_ARG;
ErrorResult err;
bool defaultActionEnabled =
piTarget->DispatchEvent(*event, CallerType::System, err);
if (aDefaultAction) {
*aDefaultAction = defaultActionEnabled;
}
return err.StealNSResult();
}
void nsContentUtils::RequestFrameFocus(Element& aFrameElement, bool aCanRaise) {
RefPtr<Element> target = &aFrameElement;
bool defaultAction = true;
if (aCanRaise) {
DispatchEventOnlyToChrome(
target->OwnerDoc(), target, NS_LITERAL_STRING("framefocusrequested"),
CanBubble::eYes, Cancelable::eYes, &defaultAction);
}
if (!defaultAction) {
return;
}
nsCOMPtr<nsIFocusManager> fm = nsFocusManager::GetFocusManager();
if (!fm) {
return;
}
uint32_t flags = nsIFocusManager::FLAG_NOSCROLL;
if (aCanRaise) {
flags |= nsIFocusManager::FLAG_RAISE;
}
fm->SetFocus(target, flags);
}
nsresult nsContentUtils::DispatchEventOnlyToChrome(
Document* aDoc, nsISupports* aTarget, const nsAString& aEventName,
CanBubble aCanBubble, Cancelable aCancelable, bool* aDefaultAction) {
return DispatchEvent(aDoc, aTarget, aEventName, aCanBubble, aCancelable,
Composed::eDefault, Trusted::eYes, aDefaultAction,
ChromeOnlyDispatch::eYes);
}
/* static */
Element* nsContentUtils::MatchElementId(nsIContent* aContent,
const nsAtom* aId) {
for (nsIContent* cur = aContent; cur; cur = cur->GetNextNode(aContent)) {
if (aId == cur->GetID()) {
return cur->AsElement();
}
}
return nullptr;
}
/* static */
Element* nsContentUtils::MatchElementId(nsIContent* aContent,
const nsAString& aId) {
MOZ_ASSERT(!aId.IsEmpty(), "Will match random elements");
// ID attrs are generally stored as atoms, so just atomize this up front
RefPtr<nsAtom> id(NS_Atomize(aId));
if (!id) {
// OOM, so just bail
return nullptr;
}
return MatchElementId(aContent, id);
}
/* static */
Document* nsContentUtils::GetSubdocumentWithOuterWindowId(
Document* aDocument, uint64_t aOuterWindowId) {
if (!aDocument || !aOuterWindowId) {
return nullptr;
}
RefPtr<nsGlobalWindowOuter> window =
nsGlobalWindowOuter::GetOuterWindowWithId(aOuterWindowId);
if (!window) {
return nullptr;
}
RefPtr<Document> foundDoc = window->GetDoc();
if (nsContentUtils::ContentIsCrossDocDescendantOf(foundDoc, aDocument)) {
// Note that ContentIsCrossDocDescendantOf will return true if
// foundDoc == aDocument.
return foundDoc;
}
return nullptr;
}
/* static */
void nsContentUtils::RegisterShutdownObserver(nsIObserver* aObserver) {
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->AddObserver(aObserver, NS_XPCOM_SHUTDOWN_OBSERVER_ID,
false);
}
}
/* static */
void nsContentUtils::UnregisterShutdownObserver(nsIObserver* aObserver) {
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->RemoveObserver(aObserver, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
}
}
/* static */
bool nsContentUtils::HasNonEmptyAttr(const nsIContent* aContent,
int32_t aNameSpaceID, nsAtom* aName) {
static Element::AttrValuesArray strings[] = {nsGkAtoms::_empty, nullptr};
return aContent->IsElement() &&
aContent->AsElement()->FindAttrValueIn(aNameSpaceID, aName, strings,
eCaseMatters) ==
Element::ATTR_VALUE_NO_MATCH;
}
/* static */
bool nsContentUtils::HasMutationListeners(nsINode* aNode, uint32_t aType,
nsINode* aTargetForSubtreeModified) {
Document* doc = aNode->OwnerDoc();
// global object will be null for documents that don't have windows.
nsPIDOMWindowInner* window = doc->GetInnerWindow();
// This relies on EventListenerManager::AddEventListener, which sets
// all mutation bits when there is a listener for DOMSubtreeModified event.
if (window && !window->HasMutationListeners(aType)) {
return false;
}
if (aNode->ChromeOnlyAccess() || aNode->IsInShadowTree()) {
return false;
}
doc->MayDispatchMutationEvent(aTargetForSubtreeModified);
// If we have a window, we can check it for mutation listeners now.
if (aNode->IsInUncomposedDoc()) {
nsCOMPtr<EventTarget> piTarget(do_QueryInterface(window));
if (piTarget) {
EventListenerManager* manager = piTarget->GetExistingListenerManager();
if (manager && manager->HasMutationListeners()) {
return true;
}
}
}
// If we have a window, we know a mutation listener is registered, but it
// might not be in our chain. If we don't have a window, we might have a
// mutation listener. Check quickly to see.
while (aNode) {
EventListenerManager* manager = aNode->GetExistingListenerManager();
if (manager && manager->HasMutationListeners()) {
return true;
}
aNode = aNode->GetParentNode();
}
return false;
}
/* static */
bool nsContentUtils::HasMutationListeners(Document* aDocument, uint32_t aType) {
nsPIDOMWindowInner* window =
aDocument ? aDocument->GetInnerWindow() : nullptr;
// This relies on EventListenerManager::AddEventListener, which sets
// all mutation bits when there is a listener for DOMSubtreeModified event.
return !window || window->HasMutationListeners(aType);
}
void nsContentUtils::MaybeFireNodeRemoved(nsINode* aChild, nsINode* aParent) {
MOZ_ASSERT(aChild, "Missing child");
MOZ_ASSERT(aChild->GetParentNode() == aParent, "Wrong parent");
MOZ_ASSERT(aChild->OwnerDoc() == aParent->OwnerDoc(), "Wrong owner-doc");
// Having an explicit check here since it's an easy mistake to fall into,
// and there might be existing code with problems. We'd rather be safe
// than fire DOMNodeRemoved in all corner cases. We also rely on it for
// nsAutoScriptBlockerSuppressNodeRemoved.
if (!IsSafeToRunScript()) {
// This checks that IsSafeToRunScript is true since we don't want to fire
// events when that is false. We can't rely on EventDispatcher to assert
// this in this situation since most of the time there are no mutation
// event listeners, in which case we won't even attempt to dispatch events.
// However this also allows for two exceptions. First off, we don't assert
// if the mutation happens to native anonymous content since we never fire
// mutation events on such content anyway.
// Second, we don't assert if sDOMNodeRemovedSuppressCount is true since
// that is a know case when we'd normally fire a mutation event, but can't
// make that safe and so we suppress it at this time. Ideally this should
// go away eventually.
if (!(aChild->IsContent() &&
aChild->AsContent()->IsInNativeAnonymousSubtree()) &&
!sDOMNodeRemovedSuppressCount) {
NS_ERROR("Want to fire DOMNodeRemoved event, but it's not safe");
WarnScriptWasIgnored(aChild->OwnerDoc());
}
return;
}
if (HasMutationListeners(aChild, NS_EVENT_BITS_MUTATION_NODEREMOVED,
aParent)) {
InternalMutationEvent mutation(true, eLegacyNodeRemoved);
mutation.mRelatedNode = aParent;
mozAutoSubtreeModified subtree(aParent->OwnerDoc(), aParent);
EventDispatcher::Dispatch(aChild, nullptr, &mutation);
}
}
void nsContentUtils::UnmarkGrayJSListenersInCCGenerationDocuments() {
if (!sEventListenerManagersHash) {
return;
}
for (auto i = sEventListenerManagersHash->Iter(); !i.Done(); i.Next()) {
auto entry = static_cast<EventListenerManagerMapEntry*>(i.Get());
nsINode* n = static_cast<nsINode*>(entry->mListenerManager->GetTarget());
if (n && n->IsInComposedDoc() &&
nsCCUncollectableMarker::InGeneration(
n->OwnerDoc()->GetMarkedCCGeneration())) {
entry->mListenerManager->MarkForCC();
}
}
}
/* static */
void nsContentUtils::TraverseListenerManager(
nsINode* aNode, nsCycleCollectionTraversalCallback& cb) {
if (!sEventListenerManagersHash) {
// We're already shut down, just return.
return;
}
auto entry = static_cast<EventListenerManagerMapEntry*>(
sEventListenerManagersHash->Search(aNode));
if (entry) {
CycleCollectionNoteChild(cb, entry->mListenerManager.get(),
"[via hash] mListenerManager");
}
}
EventListenerManager* nsContentUtils::GetListenerManagerForNode(
nsINode* aNode) {
if (!sEventListenerManagersHash) {
// We're already shut down, don't bother creating an event listener
// manager.
return nullptr;
}
auto entry = static_cast<EventListenerManagerMapEntry*>(
sEventListenerManagersHash->Add(aNode, fallible));
if (!entry) {
return nullptr;
}
if (!entry->mListenerManager) {
entry->mListenerManager = new EventListenerManager(aNode);
aNode->SetFlags(NODE_HAS_LISTENERMANAGER);
}
return entry->mListenerManager;
}
EventListenerManager* nsContentUtils::GetExistingListenerManagerForNode(
const nsINode* aNode) {
if (!aNode->HasFlag(NODE_HAS_LISTENERMANAGER)) {
return nullptr;
}
if (!sEventListenerManagersHash) {
// We're already shut down, don't bother creating an event listener
// manager.
return nullptr;
}
auto entry = static_cast<EventListenerManagerMapEntry*>(
sEventListenerManagersHash->Search(aNode));
if (entry) {
return entry->mListenerManager;
}
return nullptr;
}
/* static */
void nsContentUtils::RemoveListenerManager(nsINode* aNode) {
if (sEventListenerManagersHash) {
auto entry = static_cast<EventListenerManagerMapEntry*>(
sEventListenerManagersHash->Search(aNode));
if (entry) {
RefPtr<EventListenerManager> listenerManager;
listenerManager.swap(entry->mListenerManager);
// Remove the entry and *then* do operations that could cause further
// modification of sEventListenerManagersHash. See bug 334177.
sEventListenerManagersHash->RawRemove(entry);
if (listenerManager) {
listenerManager->Disconnect();
}
}
}
}
/* static */
bool nsContentUtils::IsValidNodeName(nsAtom* aLocalName, nsAtom* aPrefix,
int32_t aNamespaceID) {
if (aNamespaceID == kNameSpaceID_Unknown) {
return false;
}
if (!aPrefix) {
// If the prefix is null, then either the QName must be xmlns or the
// namespace must not be XMLNS.
return (aLocalName == nsGkAtoms::xmlns) ==
(aNamespaceID == kNameSpaceID_XMLNS);
}
// If the prefix is non-null then the namespace must not be null.
if (aNamespaceID == kNameSpaceID_None) {
return false;
}
// If the namespace is the XMLNS namespace then the prefix must be xmlns,
// but the localname must not be xmlns.
if (aNamespaceID == kNameSpaceID_XMLNS) {
return aPrefix == nsGkAtoms::xmlns && aLocalName != nsGkAtoms::xmlns;
}
// If the namespace is not the XMLNS namespace then the prefix must not be
// xmlns.
// If the namespace is the XML namespace then the prefix can be anything.
// If the namespace is not the XML namespace then the prefix must not be xml.
return aPrefix != nsGkAtoms::xmlns &&
(aNamespaceID == kNameSpaceID_XML || aPrefix != nsGkAtoms::xml);
}
already_AddRefed<DocumentFragment> nsContentUtils::CreateContextualFragment(
nsINode* aContextNode, const nsAString& aFragment,
bool aPreventScriptExecution, ErrorResult& aRv) {
if (!aContextNode) {
aRv.Throw(NS_ERROR_INVALID_ARG);
return nullptr;
}
// If we don't have a document here, we can't get the right security context
// for compiling event handlers... so just bail out.
RefPtr<Document> document = aContextNode->OwnerDoc();
bool isHTML = document->IsHTMLDocument();
if (isHTML) {
RefPtr<DocumentFragment> frag =
new DocumentFragment(document->NodeInfoManager());
nsCOMPtr<nsIContent> contextAsContent = do_QueryInterface(aContextNode);
if (contextAsContent && !contextAsContent->IsElement()) {
contextAsContent = contextAsContent->GetParent();
if (contextAsContent && !contextAsContent->IsElement()) {
// can this even happen?
contextAsContent = nullptr;
}
}
if (contextAsContent && !contextAsContent->IsHTMLElement(nsGkAtoms::html)) {
aRv = ParseFragmentHTML(
aFragment, frag, contextAsContent->NodeInfo()->NameAtom(),
contextAsContent->GetNameSpaceID(),
(document->GetCompatibilityMode() == eCompatibility_NavQuirks),
aPreventScriptExecution);
} else {
aRv = ParseFragmentHTML(
aFragment, frag, nsGkAtoms::body, kNameSpaceID_XHTML,
(document->GetCompatibilityMode() == eCompatibility_NavQuirks),
aPreventScriptExecution);
}
return frag.forget();
}
AutoTArray<nsString, 32> tagStack;
nsAutoString uriStr, nameStr;
nsCOMPtr<nsIContent> content = do_QueryInterface(aContextNode);
// just in case we have a text node
if (content && !content->IsElement()) content = content->GetParent();
while (content && content->IsElement()) {
nsString& tagName = *tagStack.AppendElement();
// It mostly doesn't actually matter what tag name we use here: XML doesn't
// have parsing that depends on the open tag stack, apart from namespace
// declarations. So this whole tagStack bit is just there to get the right
// namespace declarations to the XML parser. That said, the parser _is_
// going to create elements with the tag names we provide here, so we need
// to make sure they are not names that can trigger custom element
// constructors. Just make up a name that is never going to be a valid
// custom element name.
//
// The principled way to do this would probably be to add a new FromParser
// value and make sure we use it when creating the context elements, then
// make sure we teach all FromParser consumers (and in particular the custom
// element code) about it as needed. But right now the XML parser never
// actually uses FromParser values other than NOT_FROM_PARSER, and changing
// that is pretty complicated.
tagName.AssignLiteral("notacustomelement");
// see if we need to add xmlns declarations
uint32_t count = content->AsElement()->GetAttrCount();
bool setDefaultNamespace = false;
if (count > 0) {
uint32_t index;
for (index = 0; index < count; index++) {
const BorrowedAttrInfo info =
content->AsElement()->GetAttrInfoAt(index);
const nsAttrName* name = info.mName;
if (name->NamespaceEquals(kNameSpaceID_XMLNS)) {
info.mValue->ToString(uriStr);
// really want something like nsXMLContentSerializer::SerializeAttr
tagName.AppendLiteral(" xmlns"); // space important
if (name->GetPrefix()) {
tagName.Append(char16_t(':'));
name->LocalName()->ToString(nameStr);
tagName.Append(nameStr);
} else {
setDefaultNamespace = true;
}
tagName.AppendLiteral(R"(=")");
tagName.Append(uriStr);
tagName.Append('"');
}
}
}
if (!setDefaultNamespace) {
mozilla::dom::NodeInfo* info = content->NodeInfo();
if (!info->GetPrefixAtom() && info->NamespaceID() != kNameSpaceID_None) {
// We have no namespace prefix, but have a namespace ID. Push
// default namespace attr in, so that our kids will be in our
// namespace.
info->GetNamespaceURI(uriStr);
tagName.AppendLiteral(R"( xmlns=")");
tagName.Append(uriStr);
tagName.Append('"');
}
}
content = content->GetParent();
}
RefPtr<DocumentFragment> frag;
aRv = ParseFragmentXML(aFragment, document, tagStack, aPreventScriptExecution,
getter_AddRefs(frag));
return frag.forget();
}
/* static */
void nsContentUtils::DropFragmentParsers() {
NS_IF_RELEASE(sHTMLFragmentParser);
NS_IF_RELEASE(sXMLFragmentParser);
NS_IF_RELEASE(sXMLFragmentSink);
}
/* static */
void nsContentUtils::XPCOMShutdown() { nsContentUtils::DropFragmentParsers(); }
/* static */
nsresult nsContentUtils::ParseFragmentHTML(const nsAString& aSourceBuffer,
nsIContent* aTargetNode,
nsAtom* aContextLocalName,
int32_t aContextNamespace,
bool aQuirks,
bool aPreventScriptExecution) {
AutoTimelineMarker m(aTargetNode->OwnerDoc()->GetDocShell(), "Parse HTML");
if (nsContentUtils::sFragmentParsingActive) {
MOZ_ASSERT_UNREACHABLE("Re-entrant fragment parsing attempted.");
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
mozilla::AutoRestore<bool> guard(nsContentUtils::sFragmentParsingActive);
nsContentUtils::sFragmentParsingActive = true;
if (!sHTMLFragmentParser) {
NS_ADDREF(sHTMLFragmentParser = new nsHtml5StringParser());
// Now sHTMLFragmentParser owns the object
}
nsIContent* target = aTargetNode;
// If this is a chrome-privileged document, create a fragment first, and
// sanitize it before insertion.
RefPtr<DocumentFragment> fragment;
if (IsSystemPrincipal(aTargetNode->NodePrincipal())) {
fragment = new DocumentFragment(aTargetNode->OwnerDoc()->NodeInfoManager());
target = fragment;
}
nsresult rv = sHTMLFragmentParser->ParseFragment(
aSourceBuffer, target, aContextLocalName, aContextNamespace, aQuirks,
aPreventScriptExecution);
NS_ENSURE_SUCCESS(rv, rv);
if (fragment) {
// Don't fire mutation events for nodes removed by the sanitizer.
nsAutoScriptBlockerSuppressNodeRemoved scriptBlocker;
nsTreeSanitizer sanitizer(nsIParserUtils::SanitizerAllowStyle |
nsIParserUtils::SanitizerAllowComments |
nsIParserUtils::SanitizerDropForms |
nsIParserUtils::SanitizerLogRemovals);
sanitizer.Sanitize(fragment);
ErrorResult error;
aTargetNode->AppendChild(*fragment, error);
rv = error.StealNSResult();
}
return rv;
}
/* static */
nsresult nsContentUtils::ParseDocumentHTML(
const nsAString& aSourceBuffer, Document* aTargetDocument,
bool aScriptingEnabledForNoscriptParsing) {
AutoTimelineMarker m(aTargetDocument->GetDocShell(), "Parse HTML");
if (nsContentUtils::sFragmentParsingActive) {
MOZ_ASSERT_UNREACHABLE("Re-entrant fragment parsing attempted.");
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
mozilla::AutoRestore<bool> guard(nsContentUtils::sFragmentParsingActive);
nsContentUtils::sFragmentParsingActive = true;
if (!sHTMLFragmentParser) {
NS_ADDREF(sHTMLFragmentParser = new nsHtml5StringParser());
// Now sHTMLFragmentParser owns the object
}
nsresult rv = sHTMLFragmentParser->ParseDocument(
aSourceBuffer, aTargetDocument, aScriptingEnabledForNoscriptParsing);
return rv;
}
/* static */
nsresult nsContentUtils::ParseFragmentXML(const nsAString& aSourceBuffer,
Document* aDocument,
nsTArray<nsString>& aTagStack,
bool aPreventScriptExecution,
DocumentFragment** aReturn) {
AutoTimelineMarker m(aDocument->GetDocShell(), "Parse XML");
if (nsContentUtils::sFragmentParsingActive) {
MOZ_ASSERT_UNREACHABLE("Re-entrant fragment parsing attempted.");
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
mozilla::AutoRestore<bool> guard(nsContentUtils::sFragmentParsingActive);
nsContentUtils::sFragmentParsingActive = true;
if (!sXMLFragmentParser) {
nsCOMPtr<nsIParser> parser = do_CreateInstance(kCParserCID);
parser.forget(&sXMLFragmentParser);
// sXMLFragmentParser now owns the parser
}
if (!sXMLFragmentSink) {
NS_NewXMLFragmentContentSink(&sXMLFragmentSink);
// sXMLFragmentSink now owns the sink
}
nsCOMPtr<nsIContentSink> contentsink = do_QueryInterface(sXMLFragmentSink);
MOZ_ASSERT(contentsink, "Sink doesn't QI to nsIContentSink!");
sXMLFragmentParser->SetContentSink(contentsink);
sXMLFragmentSink->SetTargetDocument(aDocument);
sXMLFragmentSink->SetPreventScriptExecution(aPreventScriptExecution);
nsresult rv = sXMLFragmentParser->ParseFragment(aSourceBuffer, aTagStack);
if (NS_FAILED(rv)) {
// Drop the fragment parser and sink that might be in an inconsistent state
NS_IF_RELEASE(sXMLFragmentParser);
NS_IF_RELEASE(sXMLFragmentSink);
return rv;
}
rv = sXMLFragmentSink->FinishFragmentParsing(aReturn);
sXMLFragmentParser->Reset();
NS_ENSURE_SUCCESS(rv, rv);
// If this is a chrome-privileged document, sanitize the fragment before
// returning.
if (IsSystemPrincipal(aDocument->NodePrincipal())) {
// Don't fire mutation events for nodes removed by the sanitizer.
nsAutoScriptBlockerSuppressNodeRemoved scriptBlocker;
nsTreeSanitizer sanitizer(nsIParserUtils::SanitizerAllowStyle |
nsIParserUtils::SanitizerAllowComments |
nsIParserUtils::SanitizerDropForms |
nsIParserUtils::SanitizerLogRemovals);
sanitizer.Sanitize(*aReturn);
}
return rv;
}
/* static */
nsresult nsContentUtils::ConvertToPlainText(const nsAString& aSourceBuffer,
nsAString& aResultBuffer,
uint32_t aFlags,
uint32_t aWrapCol) {
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), "about:blank");
nsCOMPtr<nsIPrincipal> principal =
NullPrincipal::CreateWithoutOriginAttributes();
RefPtr<Document> document;
nsresult rv = NS_NewDOMDocument(getter_AddRefs(document), EmptyString(),
EmptyString(), nullptr, uri, uri, principal,
true, nullptr, DocumentFlavorHTML);
NS_ENSURE_SUCCESS(rv, rv);
rv = nsContentUtils::ParseDocumentHTML(
aSourceBuffer, document,
!(aFlags & nsIDocumentEncoder::OutputNoScriptContent));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDocumentEncoder> encoder = do_createDocumentEncoder("text/plain");
rv = encoder->Init(document, NS_LITERAL_STRING("text/plain"), aFlags);
NS_ENSURE_SUCCESS(rv, rv);
encoder->SetWrapColumn(aWrapCol);
return encoder->EncodeToString(aResultBuffer);
}
/* static */
nsresult nsContentUtils::SetNodeTextContent(nsIContent* aContent,
const nsAString& aValue,
bool aTryReuse) {
// Fire DOMNodeRemoved mutation events before we do anything else.
nsCOMPtr<nsIContent> owningContent;
// Batch possible DOMSubtreeModified events.
mozAutoSubtreeModified subtree(nullptr, nullptr);
// Scope firing mutation events so that we don't carry any state that
// might be stale
{
// We're relying on mozAutoSubtreeModified to keep a strong reference if
// needed.
Document* doc = aContent->OwnerDoc();
// Optimize the common case of there being no observers
if (HasMutationListeners(doc, NS_EVENT_BITS_MUTATION_NODEREMOVED)) {
subtree.UpdateTarget(doc, nullptr);
owningContent = aContent;
nsCOMPtr<nsINode> child;
bool skipFirst = aTryReuse;
for (child = aContent->GetFirstChild();
child && child->GetParentNode() == aContent;
child = child->GetNextSibling()) {
if (skipFirst && child->IsText()) {
skipFirst = false;
continue;
}
nsContentUtils::MaybeFireNodeRemoved(child, aContent);
}
}
}
// Might as well stick a batch around this since we're performing several
// mutations.
mozAutoDocUpdate updateBatch(aContent->GetComposedDoc(), true);
nsAutoMutationBatch mb;
if (aTryReuse && !aValue.IsEmpty()) {
// Let's remove nodes until we find a eTEXT.
while (aContent->HasChildren()) {
nsIContent* child = aContent->GetFirstChild();
if (child->IsText()) {
break;
}
aContent->RemoveChildNode(child, true);
}
// If we have a node, it must be a eTEXT and we reuse it.
if (aContent->HasChildren()) {
nsIContent* child = aContent->GetFirstChild();
nsresult rv = child->AsText()->SetText(aValue, true);
NS_ENSURE_SUCCESS(rv, rv);
// All the following nodes, if they exist, must be deleted.
while (nsIContent* nextChild = child->GetNextSibling()) {
aContent->RemoveChildNode(nextChild, true);
}
}
if (aContent->HasChildren()) {
return NS_OK;
}
} else {
mb.Init(aContent, true, false);
while (aContent->HasChildren()) {
aContent->RemoveChildNode(aContent->GetFirstChild(), true);
}
}
mb.RemovalDone();
if (aValue.IsEmpty()) {
return NS_OK;
}
RefPtr<nsTextNode> textContent =
new nsTextNode(aContent->NodeInfo()->NodeInfoManager());
textContent->SetText(aValue, true);
nsresult rv = aContent->AppendChildTo(textContent, true);
mb.NodesAdded();
return rv;
}
static bool AppendNodeTextContentsRecurse(nsINode* aNode, nsAString& aResult,
const fallible_t& aFallible) {
for (nsIContent* child = aNode->GetFirstChild(); child;
child = child->GetNextSibling()) {
if (child->IsElement()) {
bool ok = AppendNodeTextContentsRecurse(child, aResult, aFallible);
if (!ok) {
return false;
}
} else if (Text* text = child->GetAsText()) {
bool ok = text->AppendTextTo(aResult, aFallible);
if (!ok) {
return false;
}
}
}
return true;
}
/* static */
bool nsContentUtils::AppendNodeTextContent(nsINode* aNode, bool aDeep,
nsAString& aResult,
const fallible_t& aFallible) {
if (Text* text = aNode->GetAsText()) {
return text->AppendTextTo(aResult, aFallible);
}
if (aDeep) {
return AppendNodeTextContentsRecurse(aNode, aResult, aFallible);
}
for (nsIContent* child = aNode->GetFirstChild(); child;
child = child->GetNextSibling()) {
if (Text* text = child->GetAsText()) {
bool ok = text->AppendTextTo(aResult, fallible);
if (!ok) {
return false;
}
}
}
return true;
}
bool nsContentUtils::HasNonEmptyTextContent(
nsINode* aNode, TextContentDiscoverMode aDiscoverMode) {
for (nsIContent* child = aNode->GetFirstChild(); child;
child = child->GetNextSibling()) {
if (child->IsText() && child->TextLength() > 0) {
return true;
}
if (aDiscoverMode == eRecurseIntoChildren &&
HasNonEmptyTextContent(child, aDiscoverMode)) {
return true;
}
}
return false;
}
/* static */
bool nsContentUtils::IsInSameAnonymousTree(const nsINode* aNode,
const nsIContent* aContent) {
MOZ_ASSERT(aNode, "Must have a node to work with");
MOZ_ASSERT(aContent, "Must have a content to work with");
if (aNode->IsInNativeAnonymousSubtree() !=
aContent->IsInNativeAnonymousSubtree()) {
return false;
}
if (aNode->IsInNativeAnonymousSubtree()) {
return aContent->GetClosestNativeAnonymousSubtreeRoot() ==
aNode->GetClosestNativeAnonymousSubtreeRoot();
}
// FIXME: This doesn't deal with disconnected nodes whatsoever, but it didn't
// use to either. Maybe that's fine.
return aNode->GetContainingShadow() == aContent->GetContainingShadow();
}
/* static */
bool nsContentUtils::IsInInteractiveHTMLContent(const Element* aElement,
const Element* aStop) {
const Element* element = aElement;
while (element && element != aStop) {
if (element->IsInteractiveHTMLContent(true)) {
return true;
}
element = element->GetFlattenedTreeParentElement();
}
return false;
}
/* static */
void nsContentUtils::NotifyInstalledMenuKeyboardListener(bool aInstalling) {
IMEStateManager::OnInstalledMenuKeyboardListener(aInstalling);
}
/* static */
bool nsContentUtils::SchemeIs(nsIURI* aURI, const char* aScheme) {
nsCOMPtr<nsIURI> baseURI = NS_GetInnermostURI(aURI);
NS_ENSURE_TRUE(baseURI, false);
return baseURI->SchemeIs(aScheme);
}
bool nsContentUtils::IsSystemPrincipal(nsIPrincipal* aPrincipal) {
// Some consumers call us with a null aPrincipal and expect a false return
// value...
return aPrincipal && aPrincipal->IsSystemPrincipal();
}
bool nsContentUtils::IsExpandedPrincipal(nsIPrincipal* aPrincipal) {
nsCOMPtr<nsIExpandedPrincipal> ep = do_QueryInterface(aPrincipal);
return !!ep;
}
nsIPrincipal* nsContentUtils::GetSystemPrincipal() {
MOZ_ASSERT(IsInitialized());
return sSystemPrincipal;
}
bool nsContentUtils::CombineResourcePrincipals(
nsCOMPtr<nsIPrincipal>* aResourcePrincipal, nsIPrincipal* aExtraPrincipal) {
if (!aExtraPrincipal) {
return false;
}
if (!*aResourcePrincipal) {
*aResourcePrincipal = aExtraPrincipal;
return true;
}
if (*aResourcePrincipal == aExtraPrincipal) {
return false;
}
bool subsumes;
if (NS_SUCCEEDED(
(*aResourcePrincipal)->Subsumes(aExtraPrincipal, &subsumes)) &&
subsumes) {
return false;
}
*aResourcePrincipal = sSystemPrincipal;
return true;
}
/* static */
void nsContentUtils::TriggerLink(nsIContent* aContent, nsIURI* aLinkURI,
const nsString& aTargetSpec, bool aClick,
bool aIsTrusted) {
MOZ_ASSERT(aLinkURI, "No link URI");
if (aContent->IsEditable() || !aContent->OwnerDoc()->LinkHandlingEnabled()) {
return;
}
nsCOMPtr<nsIDocShell> docShell = aContent->OwnerDoc()->GetDocShell();
if (!docShell) {
return;
}
if (!aClick) {
nsDocShell::Cast(docShell)->OnOverLink(aContent, aLinkURI, aTargetSpec);
return;
}
// Check that this page is allowed to load this URI.
nsresult proceed = NS_OK;
if (sSecurityManager) {
uint32_t flag = static_cast<uint32_t>(nsIScriptSecurityManager::STANDARD);
proceed = sSecurityManager->CheckLoadURIWithPrincipal(
aContent->NodePrincipal(), aLinkURI, flag);
}
// Only pass off the click event if the script security manager says it's ok.
// We need to rest aTargetSpec for forced downloads.
if (NS_SUCCEEDED(proceed)) {
// A link/area element with a download attribute is allowed to set
// a pseudo Content-Disposition header.
// For security reasons we only allow websites to declare same-origin
// resources as downloadable. If this check fails we will just do the normal
// thing (i.e. navigate to the resource).
nsAutoString fileName;
if ((!aContent->IsHTMLElement(nsGkAtoms::a) &&
!aContent->IsHTMLElement(nsGkAtoms::area) &&
!aContent->IsSVGElement(nsGkAtoms::a)) ||
!aContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::download,
fileName) ||
NS_FAILED(
aContent->NodePrincipal()->CheckMayLoad(aLinkURI, false, true))) {
fileName.SetIsVoid(true); // No actionable download attribute was found.
}
nsCOMPtr<nsIPrincipal> triggeringPrincipal = aContent->NodePrincipal();
nsCOMPtr<nsIContentSecurityPolicy> csp = aContent->GetCsp();
nsDocShell::Cast(docShell)->OnLinkClick(
aContent, aLinkURI, fileName.IsVoid() ? aTargetSpec : EmptyString(),
fileName, nullptr, nullptr, UserActivation::IsHandlingUserInput(),
aIsTrusted, triggeringPrincipal, csp);
}
}
/* static */
void nsContentUtils::GetLinkLocation(Element* aElement,
nsString& aLocationString) {
nsCOMPtr<nsIURI> hrefURI = aElement->GetHrefURI();
if (hrefURI) {
nsAutoCString specUTF8;
nsresult rv = hrefURI->GetSpec(specUTF8);
if (NS_SUCCEEDED(rv)) CopyUTF8toUTF16(specUTF8, aLocationString);
}
}
/* static */
nsIWidget* nsContentUtils::GetTopLevelWidget(nsIWidget* aWidget) {
if (!aWidget) return nullptr;
return aWidget->GetTopLevelWidget();
}
/* static */
const nsDependentString nsContentUtils::GetLocalizedEllipsis() {
static char16_t sBuf[4] = {0, 0, 0, 0};
if (!sBuf[0]) {
if (!SpoofLocaleEnglish()) {
nsAutoString tmp;
Preferences::GetLocalizedString("intl.ellipsis", tmp);
uint32_t len =
std::min(uint32_t(tmp.Length()), uint32_t(ArrayLength(sBuf) - 1));
CopyUnicodeTo(tmp, 0, sBuf, len);
}
if (!sBuf[0]) sBuf[0] = char16_t(0x2026);
}
return nsDependentString(sBuf);
}
/* static */
void nsContentUtils::AddScriptBlocker() {
MOZ_ASSERT(NS_IsMainThread());
if (!sScriptBlockerCount) {
MOZ_ASSERT(sRunnersCountAtFirstBlocker == 0,
"Should not already have a count");
sRunnersCountAtFirstBlocker =
sBlockedScriptRunners ? sBlockedScriptRunners->Length() : 0;
}
++sScriptBlockerCount;
}
#ifdef DEBUG
static bool sRemovingScriptBlockers = false;
#endif
/* static */
void nsContentUtils::RemoveScriptBlocker() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!sRemovingScriptBlockers);
NS_ASSERTION(sScriptBlockerCount != 0, "Negative script blockers");
--sScriptBlockerCount;
if (sScriptBlockerCount) {
return;
}
if (!sBlockedScriptRunners) {
return;
}
uint32_t firstBlocker = sRunnersCountAtFirstBlocker;
uint32_t lastBlocker = sBlockedScriptRunners->Length();
uint32_t originalFirstBlocker = firstBlocker;
uint32_t blockersCount = lastBlocker - firstBlocker;
sRunnersCountAtFirstBlocker = 0;
NS_ASSERTION(firstBlocker <= lastBlocker, "bad sRunnersCountAtFirstBlocker");
while (firstBlocker < lastBlocker) {
nsCOMPtr<nsIRunnable> runnable;
runnable.swap((*sBlockedScriptRunners)[firstBlocker]);
++firstBlocker;
// Calling the runnable can reenter us
runnable->Run();
// So can dropping the reference to the runnable
runnable = nullptr;
NS_ASSERTION(sRunnersCountAtFirstBlocker == 0, "Bad count");
NS_ASSERTION(!sScriptBlockerCount, "This is really bad");
}
#ifdef DEBUG
AutoRestore<bool> removingScriptBlockers(sRemovingScriptBlockers);
sRemovingScriptBlockers = true;
#endif
sBlockedScriptRunners->RemoveElementsAt(originalFirstBlocker, blockersCount);
}
/* static */
nsIWindowProvider* nsContentUtils::GetWindowProviderForContentProcess() {
MOZ_ASSERT(XRE_IsContentProcess());
return ContentChild::GetSingleton();
}
/* static */
already_AddRefed<nsPIDOMWindowOuter>
nsContentUtils::GetMostRecentNonPBWindow() {
nsCOMPtr<nsIWindowMediator> wm = do_GetService(NS_WINDOWMEDIATOR_CONTRACTID);
nsCOMPtr<mozIDOMWindowProxy> window;
wm->GetMostRecentNonPBWindow(u"navigator:browser", getter_AddRefs(window));
nsCOMPtr<nsPIDOMWindowOuter> pwindow;
pwindow = do_QueryInterface(window);
return pwindow.forget();
}
/* static */
void nsContentUtils::WarnScriptWasIgnored(Document* aDocument) {
nsAutoString msg;
bool privateBrowsing = false;
bool chromeContext = false;
if (aDocument) {
nsCOMPtr<nsIURI> uri = aDocument->GetDocumentURI();
if (uri) {
msg.Append(NS_ConvertUTF8toUTF16(uri->GetSpecOrDefault()));
msg.AppendLiteral(" : ");
}
privateBrowsing =
!!aDocument->NodePrincipal()->OriginAttributesRef().mPrivateBrowsingId;
chromeContext = IsSystemPrincipal(aDocument->NodePrincipal());
}
msg.AppendLiteral(
"Unable to run script because scripts are blocked internally.");
LogSimpleConsoleError(msg, "DOM", privateBrowsing, chromeContext);
}
/* static */
void nsContentUtils::AddScriptRunner(already_AddRefed<nsIRunnable> aRunnable) {
nsCOMPtr<nsIRunnable> runnable = aRunnable;
if (!runnable) {
return;
}
if (sScriptBlockerCount) {
sBlockedScriptRunners->AppendElement(runnable.forget());
return;
}
runnable->Run();
}
/* static */
void nsContentUtils::AddScriptRunner(nsIRunnable* aRunnable) {
nsCOMPtr<nsIRunnable> runnable = aRunnable;
AddScriptRunner(runnable.forget());
}
/* static */
void nsContentUtils::RunInStableState(already_AddRefed<nsIRunnable> aRunnable) {
MOZ_ASSERT(CycleCollectedJSContext::Get(), "Must be on a script thread!");
CycleCollectedJSContext::Get()->RunInStableState(std::move(aRunnable));
}
/* static */
void nsContentUtils::AddPendingIDBTransaction(
already_AddRefed<nsIRunnable> aTransaction) {
MOZ_ASSERT(CycleCollectedJSContext::Get(), "Must be on a script thread!");
CycleCollectedJSContext::Get()->AddPendingIDBTransaction(
std::move(aTransaction));
}
/* static */
bool nsContentUtils::IsInStableOrMetaStableState() {
MOZ_ASSERT(CycleCollectedJSContext::Get(), "Must be on a script thread!");
return CycleCollectedJSContext::Get()->IsInStableOrMetaStableState();
}
/* static */
void nsContentUtils::HidePopupsInDocument(Document* aDocument) {
#ifdef MOZ_XUL
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
if (pm && aDocument) {
nsCOMPtr<nsIDocShellTreeItem> docShellToHide = aDocument->GetDocShell();
if (docShellToHide) pm->HidePopupsInDocShell(docShellToHide);
}
#endif
}
/* static */
already_AddRefed<nsIDragSession> nsContentUtils::GetDragSession() {
nsCOMPtr<nsIDragSession> dragSession;
nsCOMPtr<nsIDragService> dragService =
do_GetService("@mozilla.org/widget/dragservice;1");
if (dragService) dragService->GetCurrentSession(getter_AddRefs(dragSession));
return dragSession.forget();
}
/* static */
nsresult nsContentUtils::SetDataTransferInEvent(WidgetDragEvent* aDragEvent) {
if (aDragEvent->mDataTransfer || !aDragEvent->IsTrusted()) {
return NS_OK;
}
// For dragstart events, the data transfer object is
// created before the event fires, so it should already be set. For other
// drag events, get the object from the drag session.
NS_ASSERTION(aDragEvent->mMessage != eDragStart,
"draggesture event created without a dataTransfer");
nsCOMPtr<nsIDragSession> dragSession = GetDragSession();
NS_ENSURE_TRUE(dragSession, NS_OK); // no drag in progress
RefPtr<DataTransfer> initialDataTransfer = dragSession->GetDataTransfer();
if (!initialDataTransfer) {
// A dataTransfer won't exist when a drag was started by some other
// means, for instance calling the drag service directly, or a drag
// from another application. In either case, a new dataTransfer should
// be created that reflects the data.
initialDataTransfer =
new DataTransfer(aDragEvent->mTarget, aDragEvent->mMessage, true, -1);
// now set it in the drag session so we don't need to create it again
dragSession->SetDataTransfer(initialDataTransfer);
}
bool isCrossDomainSubFrameDrop = false;
if (aDragEvent->mMessage == eDrop) {
isCrossDomainSubFrameDrop = CheckForSubFrameDrop(dragSession, aDragEvent);
}
// each event should use a clone of the original dataTransfer.
initialDataTransfer->Clone(
aDragEvent->mTarget, aDragEvent->mMessage, aDragEvent->mUserCancelled,
isCrossDomainSubFrameDrop, getter_AddRefs(aDragEvent->mDataTransfer));
if (NS_WARN_IF(!aDragEvent->mDataTransfer)) {
return NS_ERROR_OUT_OF_MEMORY;
}
// for the dragenter and dragover events, initialize the drop effect
// from the drop action, which platform specific widget code sets before
// the event is fired based on the keyboard state.
if (aDragEvent->mMessage == eDragEnter || aDragEvent->mMessage == eDragOver) {
uint32_t action;
dragSession->GetDragAction(&action);
uint32_t effectAllowed = aDragEvent->mDataTransfer->EffectAllowedInt();
aDragEvent->mDataTransfer->SetDropEffectInt(
FilterDropEffect(action, effectAllowed));
} else if (aDragEvent->mMessage == eDrop ||
aDragEvent->mMessage == eDragEnd) {
// For the drop and dragend events, set the drop effect based on the
// last value that the dropEffect had. This will have been set in
// EventStateManager::PostHandleEvent for the last dragenter or
// dragover event.
aDragEvent->mDataTransfer->SetDropEffectInt(
initialDataTransfer->DropEffectInt());
}
return NS_OK;
}
/* static */
uint32_t nsContentUtils::FilterDropEffect(uint32_t aAction,
uint32_t aEffectAllowed) {
// It is possible for the drag action to include more than one action, but
// the widget code which sets the action from the keyboard state should only
// be including one. If multiple actions were set, we just consider them in
// the following order:
// copy, link, move
if (aAction & nsIDragService::DRAGDROP_ACTION_COPY)
aAction = nsIDragService::DRAGDROP_ACTION_COPY;
else if (aAction & nsIDragService::DRAGDROP_ACTION_LINK)
aAction = nsIDragService::DRAGDROP_ACTION_LINK;
else if (aAction & nsIDragService::DRAGDROP_ACTION_MOVE)
aAction = nsIDragService::DRAGDROP_ACTION_MOVE;
// Filter the action based on the effectAllowed. If the effectAllowed
// doesn't include the action, then that action cannot be done, so adjust
// the action to something that is allowed. For a copy, adjust to move or
// link. For a move, adjust to copy or link. For a link, adjust to move or
// link. Otherwise, use none.
if (aAction & aEffectAllowed ||
aEffectAllowed == nsIDragService::DRAGDROP_ACTION_UNINITIALIZED)
return aAction;
if (aEffectAllowed & nsIDragService::DRAGDROP_ACTION_MOVE)
return nsIDragService::DRAGDROP_ACTION_MOVE;
if (aEffectAllowed & nsIDragService::DRAGDROP_ACTION_COPY)
return nsIDragService::DRAGDROP_ACTION_COPY;
if (aEffectAllowed & nsIDragService::DRAGDROP_ACTION_LINK)
return nsIDragService::DRAGDROP_ACTION_LINK;
return nsIDragService::DRAGDROP_ACTION_NONE;
}
/* static */
bool nsContentUtils::CheckForSubFrameDrop(nsIDragSession* aDragSession,
WidgetDragEvent* aDropEvent) {
nsCOMPtr<nsIContent> target = do_QueryInterface(aDropEvent->mOriginalTarget);
if (!target) {
return true;
}
Document* targetDoc = target->OwnerDoc();
nsPIDOMWindowOuter* targetWin = targetDoc->GetWindow();
if (!targetWin) {
return true;
}
nsCOMPtr<nsIDocShellTreeItem> tdsti = targetWin->GetDocShell();
if (!tdsti) {
return true;
}
// Always allow dropping onto chrome shells.
if (tdsti->ItemType() == nsIDocShellTreeItem::typeChrome) {
return false;
}
// If there is no source node, then this is a drag from another
// application, which should be allowed.
RefPtr<Document> doc;
aDragSession->GetSourceDocument(getter_AddRefs(doc));
if (doc) {
// Get each successive parent of the source document and compare it to
// the drop document. If they match, then this is a drag from a child frame.
do {
doc = doc->GetInProcessParentDocument();
if (doc == targetDoc) {
// The drag is from a child frame.
return true;
}
} while (doc);
}
return false;
}
/* static */
bool nsContentUtils::URIIsLocalFile(nsIURI* aURI) {
bool isFile;
nsCOMPtr<nsINetUtil> util = do_QueryInterface(sIOService);
// Important: we do NOT test the entire URI chain here!
return util &&
NS_SUCCEEDED(util->ProtocolHasFlags(
aURI, nsIProtocolHandler::URI_IS_LOCAL_FILE, &isFile)) &&
isFile;
}
/* static */
JSContext* nsContentUtils::GetCurrentJSContext() {
MOZ_ASSERT(IsInitialized());
if (!IsJSAPIActive()) {
return nullptr;
}
return danger::GetJSContext();
}
template <typename StringType, typename CharType>
void _ASCIIToLowerInSitu(StringType& aStr) {
CharType* iter = aStr.BeginWriting();
CharType* end = aStr.EndWriting();
MOZ_ASSERT(iter && end);
while (iter != end) {
CharType c = *iter;
if (c >= 'A' && c <= 'Z') {
*iter = c + ('a' - 'A');
}
++iter;
}
}
/* static */
void nsContentUtils::ASCIIToLower(nsAString& aStr) {
return _ASCIIToLowerInSitu<nsAString, char16_t>(aStr);
}
/* static */
void nsContentUtils::ASCIIToLower(nsACString& aStr) {
return _ASCIIToLowerInSitu<nsACString, char>(aStr);
}
template <typename StringType, typename CharType>
void _ASCIIToLowerCopy(const StringType& aSource, StringType& aDest) {
uint32_t len = aSource.Length();
aDest.SetLength(len);
MOZ_ASSERT(aDest.Length() == len);
CharType* dest = aDest.BeginWriting();
MOZ_ASSERT(dest);
const CharType* iter = aSource.BeginReading();
const CharType* end = aSource.EndReading();
while (iter != end) {
CharType c = *iter;
*dest = (c >= 'A' && c <= 'Z') ? c + ('a' - 'A') : c;
++iter;
++dest;
}
}
/* static */
void nsContentUtils::ASCIIToLower(const nsAString& aSource, nsAString& aDest) {
return _ASCIIToLowerCopy<nsAString, char16_t>(aSource, aDest);
}
/* static */
void nsContentUtils::ASCIIToLower(const nsACString& aSource,
nsACString& aDest) {
return _ASCIIToLowerCopy<nsACString, char>(aSource, aDest);
}
template <typename StringType, typename CharType>
void _ASCIIToUpperInSitu(StringType& aStr) {
CharType* iter = aStr.BeginWriting();
CharType* end = aStr.EndWriting();
MOZ_ASSERT(iter && end);
while (iter != end) {
CharType c = *iter;
if (c >= 'a' && c <= 'z') {
*iter = c + ('A' - 'a');
}
++iter;
}
}
/* static */
void nsContentUtils::ASCIIToUpper(nsAString& aStr) {
return _ASCIIToUpperInSitu<nsAString, char16_t>(aStr);
}
/* static */
void nsContentUtils::ASCIIToUpper(nsACString& aStr) {
return _ASCIIToUpperInSitu<nsACString, char>(aStr);
}
template <typename StringType, typename CharType>
void _ASCIIToUpperCopy(const StringType& aSource, StringType& aDest) {
uint32_t len = aSource.Length();
aDest.SetLength(len);
MOZ_ASSERT(aDest.Length() == len);
CharType* dest = aDest.BeginWriting();
MOZ_ASSERT(dest);
const CharType* iter = aSource.BeginReading();
const CharType* end = aSource.EndReading();
while (iter != end) {
CharType c = *iter;
*dest = (c >= 'a' && c <= 'z') ? c + ('A' - 'a') : c;
++iter;
++dest;
}
}
/* static */
void nsContentUtils::ASCIIToUpper(const nsAString& aSource, nsAString& aDest) {
return _ASCIIToUpperCopy<nsAString, char16_t>(aSource, aDest);
}
/* static */
void nsContentUtils::ASCIIToUpper(const nsACString& aSource,
nsACString& aDest) {
return _ASCIIToUpperCopy<nsACString, char>(aSource, aDest);
}
/* static */
bool nsContentUtils::EqualsIgnoreASCIICase(const nsAString& aStr1,
const nsAString& aStr2) {
uint32_t len = aStr1.Length();
if (len != aStr2.Length()) {
return false;
}
const char16_t* str1 = aStr1.BeginReading();
const char16_t* str2 = aStr2.BeginReading();
const char16_t* end = str1 + len;
while (str1 < end) {
char16_t c1 = *str1++;
char16_t c2 = *str2++;
// First check if any bits other than the 0x0020 differs
if ((c1 ^ c2) & 0xffdf) {
return false;
}
// We know they can only differ in the 0x0020 bit.
// Likely the two chars are the same, so check that first
if (c1 != c2) {
// They do differ, but since it's only in the 0x0020 bit, check if it's
// the same ascii char, but just differing in case
char16_t c1Upper = c1 & 0xffdf;
if (!('A' <= c1Upper && c1Upper <= 'Z')) {
return false;
}
}
}
return true;
}
/* static */
bool nsContentUtils::StringContainsASCIIUpper(const nsAString& aStr) {
const char16_t* iter = aStr.BeginReading();
const char16_t* end = aStr.EndReading();
while (iter != end) {
char16_t c = *iter;
if (c >= 'A' && c <= 'Z') {
return true;
}
++iter;
}
return false;
}
/* static */
nsIInterfaceRequestor* nsContentUtils::SameOriginChecker() {
if (!sSameOriginChecker) {
sSameOriginChecker = new SameOriginCheckerImpl();
NS_ADDREF(sSameOriginChecker);
}
return sSameOriginChecker;
}
/* static */
nsresult nsContentUtils::CheckSameOrigin(nsIChannel* aOldChannel,
nsIChannel* aNewChannel) {
if (!nsContentUtils::GetSecurityManager()) return NS_ERROR_NOT_AVAILABLE;
nsCOMPtr<nsIPrincipal> oldPrincipal;
nsContentUtils::GetSecurityManager()->GetChannelResultPrincipal(
aOldChannel, getter_AddRefs(oldPrincipal));
nsCOMPtr<nsIURI> newURI;
aNewChannel->GetURI(getter_AddRefs(newURI));
nsCOMPtr<nsIURI> newOriginalURI;
aNewChannel->GetOriginalURI(getter_AddRefs(newOriginalURI));
NS_ENSURE_STATE(oldPrincipal && newURI && newOriginalURI);
nsresult rv = oldPrincipal->CheckMayLoad(newURI, false, false);
if (NS_SUCCEEDED(rv) && newOriginalURI != newURI) {
rv = oldPrincipal->CheckMayLoad(newOriginalURI, false, false);
}
return rv;
}
NS_IMPL_ISUPPORTS(SameOriginCheckerImpl, nsIChannelEventSink,
nsIInterfaceRequestor)
NS_IMETHODIMP
SameOriginCheckerImpl::AsyncOnChannelRedirect(
nsIChannel* aOldChannel, nsIChannel* aNewChannel, uint32_t aFlags,
nsIAsyncVerifyRedirectCallback* cb) {
MOZ_ASSERT(aNewChannel, "Redirecting to null channel?");
nsresult rv = nsContentUtils::CheckSameOrigin(aOldChannel, aNewChannel);
if (NS_SUCCEEDED(rv)) {
cb->OnRedirectVerifyCallback(NS_OK);
}
return rv;
}
NS_IMETHODIMP
SameOriginCheckerImpl::GetInterface(const nsIID& aIID, void** aResult) {
return QueryInterface(aIID, aResult);
}
/* static */
nsresult nsContentUtils::GetASCIIOrigin(nsIPrincipal* aPrincipal,
nsACString& aOrigin) {
MOZ_ASSERT(aPrincipal, "missing principal");
aOrigin.Truncate();
nsCOMPtr<nsIURI> uri;
nsresult rv = aPrincipal->GetURI(getter_AddRefs(uri));
NS_ENSURE_SUCCESS(rv, rv);
if (uri) {
return GetASCIIOrigin(uri, aOrigin);
}
aOrigin.AssignLiteral("null");
return NS_OK;
}
/* static */
nsresult nsContentUtils::GetASCIIOrigin(nsIURI* aURI, nsACString& aOrigin) {
MOZ_ASSERT(aURI, "missing uri");
// For Blob URI, the path is the URL of the owning page.
if (aURI->SchemeIs(BLOBURI_SCHEME)) {
nsAutoCString path;
nsresult rv = aURI->GetPathQueryRef(path);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIURI> uri;
rv = NS_NewURI(getter_AddRefs(uri), path);
if (NS_FAILED(rv)) {
aOrigin.AssignLiteral("null");
return NS_OK;
}
return GetASCIIOrigin(uri, aOrigin);
}
aOrigin.Truncate();
nsCOMPtr<nsIURI> uri = NS_GetInnermostURI(aURI);
NS_ENSURE_TRUE(uri, NS_ERROR_UNEXPECTED);
nsAutoCString host;
nsresult rv = uri->GetAsciiHost(host);
if (NS_SUCCEEDED(rv) && !host.IsEmpty()) {
nsAutoCString userPass;
uri->GetUserPass(userPass);
nsAutoCString prePath;
if (!userPass.IsEmpty()) {
rv = NS_MutateURI(uri).SetUserPass(EmptyCString()).Finalize(uri);
NS_ENSURE_SUCCESS(rv, rv);
}
rv = uri->GetPrePath(prePath);
NS_ENSURE_SUCCESS(rv, rv);
aOrigin = prePath;
} else {
aOrigin.AssignLiteral("null");
}
return NS_OK;
}
/* static */
nsresult nsContentUtils::GetUTFOrigin(nsIPrincipal* aPrincipal,
nsAString& aOrigin) {
MOZ_ASSERT(aPrincipal, "missing principal");
aOrigin.Truncate();
nsAutoCString asciiOrigin;
nsresult rv = GetASCIIOrigin(aPrincipal, asciiOrigin);
NS_ENSURE_SUCCESS(rv, rv);
aOrigin = NS_ConvertUTF8toUTF16(asciiOrigin);
return NS_OK;
}
/* static */
nsresult nsContentUtils::GetUTFOrigin(nsIURI* aURI, nsAString& aOrigin) {
MOZ_ASSERT(aURI, "missing uri");
nsresult rv;
#if defined(MOZ_THUNDERBIRD) || defined(MOZ_SUITE)
// Check if either URI has a special origin.
nsCOMPtr<nsIURIWithSpecialOrigin> uriWithSpecialOrigin =
do_QueryInterface(aURI);
if (uriWithSpecialOrigin) {
nsCOMPtr<nsIURI> origin;
rv = uriWithSpecialOrigin->GetOrigin(getter_AddRefs(origin));
NS_ENSURE_SUCCESS(rv, rv);
return GetUTFOrigin(origin, aOrigin);
}
#endif
nsAutoCString asciiOrigin;
rv = GetASCIIOrigin(aURI, asciiOrigin);
NS_ENSURE_SUCCESS(rv, rv);
aOrigin = NS_ConvertUTF8toUTF16(asciiOrigin);
return NS_OK;
}
/* static */
bool nsContentUtils::CheckMayLoad(nsIPrincipal* aPrincipal,
nsIChannel* aChannel,
bool aAllowIfInheritsPrincipal) {
nsCOMPtr<nsIURI> channelURI;
nsresult rv = NS_GetFinalChannelURI(aChannel, getter_AddRefs(channelURI));
NS_ENSURE_SUCCESS(rv, false);
return NS_SUCCEEDED(
aPrincipal->CheckMayLoad(channelURI, false, aAllowIfInheritsPrincipal));
}
/* static */
bool nsContentUtils::CanAccessNativeAnon() {
return LegacyIsCallerChromeOrNativeCode() || IsCallerContentXBL();
}
/* static */
nsresult nsContentUtils::DispatchXULCommand(nsIContent* aTarget, bool aTrusted,
Event* aSourceEvent,
PresShell* aPresShell, bool aCtrl,
bool aAlt, bool aShift, bool aMeta,
uint16_t aInputSource) {
NS_ENSURE_STATE(aTarget);
Document* doc = aTarget->OwnerDoc();
nsPresContext* presContext = doc->GetPresContext();
RefPtr<XULCommandEvent> xulCommand =
new XULCommandEvent(doc, presContext, nullptr);
xulCommand->InitCommandEvent(NS_LITERAL_STRING("command"), true, true,
nsGlobalWindowInner::Cast(doc->GetInnerWindow()),
0, aCtrl, aAlt, aShift, aMeta, aSourceEvent,
aInputSource, IgnoreErrors());
if (aPresShell) {
nsEventStatus status = nsEventStatus_eIgnore;
return aPresShell->HandleDOMEventWithTarget(aTarget, xulCommand, &status);
}
ErrorResult rv;
aTarget->DispatchEvent(*xulCommand, rv);
return rv.StealNSResult();
}
// static
nsresult nsContentUtils::WrapNative(JSContext* cx, nsISupports* native,
nsWrapperCache* cache, const nsIID* aIID,
JS::MutableHandle<JS::Value> vp,
bool aAllowWrapping) {
MOZ_ASSERT(cx == GetCurrentJSContext());
if (!native) {
vp.setNull();
return NS_OK;
}
JSObject* wrapper = xpc_FastGetCachedWrapper(cx, cache, vp);
if (wrapper) {
return NS_OK;
}
NS_ENSURE_TRUE(sXPConnect, NS_ERROR_UNEXPECTED);
if (!NS_IsMainThread()) {
MOZ_CRASH();
}
JS::Rooted<JSObject*> scope(cx, JS::CurrentGlobalOrNull(cx));
nsresult rv = sXPConnect->WrapNativeToJSVal(cx, scope, native, cache, aIID,
aAllowWrapping, vp);
return rv;
}
nsresult nsContentUtils::CreateArrayBuffer(JSContext* aCx,
const nsACString& aData,
JSObject** aResult) {
if (!aCx) {
return NS_ERROR_FAILURE;
}
int32_t dataLen = aData.Length();
*aResult = JS::NewArrayBuffer(aCx, dataLen);
if (!*aResult) {
return NS_ERROR_FAILURE;
}
if (dataLen > 0) {
NS_ASSERTION(JS::IsArrayBufferObject(*aResult), "What happened?");
JS::AutoCheckCannotGC nogc;
bool isShared;
memcpy(JS::GetArrayBufferData(*aResult, &isShared, nogc),
aData.BeginReading(), dataLen);
MOZ_ASSERT(!isShared);
}
return NS_OK;
}
void nsContentUtils::StripNullChars(const nsAString& aInStr,
nsAString& aOutStr) {
// In common cases where we don't have nulls in the
// string we can simple simply bypass the checking code.
int32_t firstNullPos = aInStr.FindChar('\0');
if (firstNullPos == kNotFound) {
aOutStr.Assign(aInStr);
return;
}
aOutStr.SetCapacity(aInStr.Length() - 1);
nsAString::const_iterator start, end;
aInStr.BeginReading(start);
aInStr.EndReading(end);
while (start != end) {
if (*start != '\0') aOutStr.Append(*start);
++start;
}
}
struct ClassMatchingInfo {
AtomArray mClasses;
nsCaseTreatment mCaseTreatment;
};
// static
bool nsContentUtils::MatchClassNames(Element* aElement, int32_t aNamespaceID,
nsAtom* aAtom, void* aData) {
// We can't match if there are no class names
const nsAttrValue* classAttr = aElement->GetClasses();
if (!classAttr) {
return false;
}
// need to match *all* of the classes
ClassMatchingInfo* info = static_cast<ClassMatchingInfo*>(aData);
uint32_t length = info->mClasses.Length();
if (!length) {
// If we actually had no classes, don't match.
return false;
}
uint32_t i;
for (i = 0; i < length; ++i) {
if (!classAttr->Contains(info->mClasses[i], info->mCaseTreatment)) {
return false;
}
}
return true;
}
// static
void nsContentUtils::DestroyClassNameArray(void* aData) {
ClassMatchingInfo* info = static_cast<ClassMatchingInfo*>(aData);
delete info;
}
// static
void* nsContentUtils::AllocClassMatchingInfo(nsINode* aRootNode,
const nsString* aClasses) {
nsAttrValue attrValue;
attrValue.ParseAtomArray(*aClasses);
// nsAttrValue::Equals is sensitive to order, so we'll send an array
auto* info = new ClassMatchingInfo;
if (attrValue.Type() == nsAttrValue::eAtomArray) {
info->mClasses.SwapElements(*(attrValue.GetAtomArrayValue()));
} else if (attrValue.Type() == nsAttrValue::eAtom) {
info->mClasses.AppendElement(attrValue.GetAtomValue());
}
info->mCaseTreatment =
aRootNode->OwnerDoc()->GetCompatibilityMode() == eCompatibility_NavQuirks
? eIgnoreCase
: eCaseMatters;
return info;
}
// static
bool nsContentUtils::IsFocusedContent(const nsIContent* aContent) {
nsFocusManager* fm = nsFocusManager::GetFocusManager();
return fm && fm->GetFocusedElement() == aContent;
}
bool nsContentUtils::IsSubDocumentTabbable(nsIContent* aContent) {
Document* doc = aContent->GetComposedDoc();
if (!doc) {
return false;
}
// If the subdocument lives in another process, the frame is
// tabbable.
if (EventStateManager::IsRemoteTarget(aContent) ||
BrowserBridgeChild::GetFrom(aContent)) {
return true;
}
// XXXbz should this use OwnerDoc() for GetSubDocumentFor?
// sXBL/XBL2 issue!
Document* 