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/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 */
interface URI;
interface nsIDocShell;
interface nsISecureBrowserUI;
interface nsISHEntry;
interface nsIPrintSettings;
interface nsIWebProgress;
interface mixin LoadContextMixin {
readonly attribute WindowProxy? associatedWindow;
readonly attribute WindowProxy? topWindow;
readonly attribute Element? topFrameElement;
readonly attribute boolean isContent;
attribute boolean usePrivateBrowsing;
readonly attribute boolean useRemoteTabs;
readonly attribute boolean useRemoteSubframes;
[BinaryName="useTrackingProtectionWebIDL", SetterThrows]
attribute boolean useTrackingProtection;
[NewObject, Throws]
readonly attribute any originAttributes;
* Allowed CSS display modes. This needs to be kept in
* sync with similar values in ServoStyleConsts.h
enum DisplayMode {
* CSS prefers-color-scheme values.
enum PrefersColorSchemeOverride {
* Allowed overrides of platform/pref default behaviour for touch events.
enum TouchEventsOverride {
"disabled", // Force-disable touch events.
"enabled", // Force-enable touch events.
"none", // Don't override behaviour for touch events.
[Exposed=Window, ChromeOnly]
interface BrowsingContext {
static BrowsingContext? get(unsigned long long aId);
static BrowsingContext? getFromWindow(WindowProxy window);
static BrowsingContext? getCurrentTopByBrowserId(unsigned long long aId);
sequence<BrowsingContext> getAllBrowsingContextsInSubtree();
readonly attribute DOMString name;
readonly attribute BrowsingContext? parent;
readonly attribute BrowsingContext top;
[Cached, Frozen, Pure]
readonly attribute sequence<BrowsingContext> children;
readonly attribute nsIDocShell? docShell;
readonly attribute Element? embedderElement;
readonly attribute unsigned long long id;
readonly attribute BrowsingContext? opener;
readonly attribute BrowsingContextGroup group;
readonly attribute WindowProxy? window;
readonly attribute WindowContext? currentWindowContext;
readonly attribute WindowContext? parentWindowContext;
readonly attribute WindowContext? topWindowContext;
readonly attribute boolean ancestorsAreCurrent;
[SetterThrows] attribute [LegacyNullToEmptyString] DOMString customPlatform;
[SetterThrows] attribute [LegacyNullToEmptyString] DOMString customUserAgent;
readonly attribute DOMString embedderElementType;
readonly attribute boolean createdDynamically;
readonly attribute boolean isInBFCache;
readonly attribute boolean isDiscarded;
* The sandbox flags on the browsing context. These reflect the value of the
* sandbox attribute of the associated IFRAME or CSP-protectable content, if
* existent. See the HTML5 spec for more details.
* These flags on the browsing context reflect the current state of the
* sandbox attribute, which is modifiable. They are only used when loading new
* content, sandbox flags are also immutably set on the document when it is
* loaded.
* The sandbox flags of a document depend on the sandbox flags on its
* browsing context and of its parent document, if any.
* See nsSandboxFlags.h for the possible flags.
[SetterThrows] attribute unsigned long sandboxFlags;
* Whether the BrowsingContext is active. That is, whether it's in a
* foreground tab, and not minimized or fully occluded otherwise.
readonly attribute boolean isActive;
* When set to true all channels in this browsing context or its children will report navigator.onLine = false,
* and HTTP requests created from these browsing context will fail with NS_ERROR_OFFLINE.
[SetterThrows] attribute boolean forceOffline;
* Sets whether this is an app tab. Non-same-origin link navigations from app
* tabs may be forced to open in new contexts, rather than in the same context.
[SetterThrows] attribute boolean isAppTab;
* Sets whether this is BC has siblings **at the toplevel** (e.g. in a tabbed
* browser environment). Used to determine if web content can resize the top
* window. Never set correctly for non-top BCs.
[SetterThrows] attribute boolean hasSiblings;
// The inRDMPane flag indicates whether or not Responsive Design Mode is
// active for the browsing context.
[SetterThrows] attribute boolean inRDMPane;
[SetterThrows] attribute float fullZoom;
[SetterThrows] attribute float textZoom;
// Override the dots-per-CSS-pixel scaling factor in this BrowsingContext
// and all of its descendants. May only be set on the top BC, and should
// only be set from the parent process.
// A value of 0.0 causes us to use the global default scaling factor.
// NOTE that this override only affects a few minor things (the value exposed
// to devicePixelRatio and some media queries in content, and responsive
// image selection). Most notably, it does _not_ affect rendering.
// It is intended for RDM, and is probably not what you want in other cases.
// If you want to change the actual device pixel ratio that rendering code
// uses, you probably want to change the fullZoom.
[SetterThrows] attribute float overrideDPPX;
[SetterThrows] attribute boolean suspendMediaWhenInactive;
// Default value for nsIDocumentViewer::authorStyleDisabled in any new
// browsing contexts created as a descendant of this one.
// Valid only for top browsing contexts.
[SetterThrows] attribute boolean authorStyleDisabledDefault;
* Whether this docshell should save entries in global history.
[SetterThrows] attribute boolean useGlobalHistory;
// Extension to give chrome JS the ability to set the window screen
// orientation while in RDM.
[Throws] undefined setRDMPaneOrientation(OrientationType type, float rotationAngle);
// Extension to give chrome JS the ability to set a maxTouchPoints override
// while in RDM.
[Throws] undefined setRDMPaneMaxTouchPoints(octet maxTouchPoints);
// The watchedByDevTools flag indicates whether or not DevTools are currently
// debugging this browsing context.
[SetterThrows] attribute boolean watchedByDevTools;
// Enable some service workers testing features, for DevTools.
[SetterThrows] attribute boolean serviceWorkersTestingEnabled;
// Enable media query medium override, for DevTools.
[SetterThrows] attribute DOMString mediumOverride;
// Color-scheme simulation, for DevTools.
[SetterThrows] attribute PrefersColorSchemeOverride prefersColorSchemeOverride;
* A unique identifier for the browser element that is hosting this
* BrowsingContext tree. Every BrowsingContext in the element's tree will
* return the same ID in all processes and it will remain stable regardless of
* process changes. When a browser element's frameloader is switched to
* another browser element this ID will remain the same but hosted under the
* under the new browser element.
[SetterThrows] attribute unsigned long long browserId;
[SetterThrows] attribute DisplayMode displayMode;
* This allows chrome to override the default choice of whether touch events
* are available in a specific BrowsingContext and its descendents.
readonly attribute TouchEventsOverride touchEventsOverride;
* Returns true if the top-level BrowsingContext has been configured to
* default-target user-initiated link clicks to _blank.
readonly attribute boolean targetTopLevelLinkClicksToBlank;
* Partially determines whether script execution is allowed in this
* BrowsingContext. Script execution will be permitted only if this
* attribute is true and script execution is allowed in the parent
* WindowContext.
* May only be set in the parent process.
[SetterThrows] attribute boolean allowJavascript;
* Determines whether we're forcing a desktop-mode viewport. Only settable in
* the top browsing context from the parent process.
[SetterThrows] attribute boolean forceDesktopViewport;
* Default load flags (as defined in nsIRequest) that will be set on all
* requests made by this BrowsingContext.
[SetterThrows] attribute long defaultLoadFlags;
* The nsID of the browsing context in the session history.
[NewObject, Throws]
readonly attribute any historyID;
readonly attribute ChildSHistory? childSessionHistory;
// Resets the location change rate limit. Used for testing.
undefined resetLocationChangeRateLimit();
readonly attribute long childOffset;
BrowsingContext includes LoadContextMixin;
[Exposed=Window, ChromeOnly]
interface CanonicalBrowsingContext : BrowsingContext {
sequence<WindowGlobalParent> getWindowGlobals();
readonly attribute WindowGlobalParent? currentWindowGlobal;
readonly attribute WindowProxy? topChromeWindow;
// XXX(nika): This feels kinda hacky, but will do for now while we don't
// synchronously create WindowGlobalParent. It can throw if somehow the
// content process has died.
readonly attribute UTF8String? currentRemoteType;
readonly attribute WindowGlobalParent? embedderWindowGlobal;
undefined notifyStartDelayedAutoplayMedia();
[Throws] undefined notifyMediaMutedChanged(boolean muted);
readonly attribute nsISecureBrowserUI? secureBrowserUI;
* Returns an nsIWebProgress object for this BrowsingContext, if this
* is a top-level content BC.
* Progress listeners attached to this will get notifications filtered by
* nsBrowserStatusFilter, and don't get any notifications from sub frames.
readonly attribute nsIWebProgress? webProgress;
static unsigned long countSiteOrigins(sequence<BrowsingContext> roots);
* Loads a given URI. This will give priority to loading the requested URI
* in the object implementing this interface. If it can't be loaded here
* however, the URI dispatcher will go through its normal process of content
* loading.
* @param aURI
* The URI to load. No fixup will be performed on this URI.
* @param aLoadURIOptions
* A JSObject defined in LoadURIOptions.webidl holding info like e.g.
* the triggeringPrincipal, the referrer info.
undefined loadURI(URI aURI, optional LoadURIOptions aOptions = {});
* Like `loadURI` but takes a DOMString instead. This will use nsIURIFixup
* to "fix up" the input if it doesn't parse as a string. If an existing
* DOM URL or nsIURI object is available to you, prefer using `loadURI`
* directly.
* @param aURI
* The URI to load. For HTTP and FTP URLs and possibly others,
* characters above U+007F will be converted to UTF-8 and then URL-
* escaped per the rules of RFC 2396.
* @param aLoadURIOptions
* A JSObject defined in LoadURIOptions.webidl holding info like e.g.
* the triggeringPrincipal, the referrer info.
undefined fixupAndLoadURIString(DOMString aURI, optional LoadURIOptions aOptions = {});
* Print the current document.
* @param aOuterWindowID the ID of the outer window to print
* @param aPrintSettings print settings to use; printSilent can be
* set to prevent prompting.
* @return A Promise that resolves once printing is finished.
[NewObject, BinaryName="printJS"]
Promise<undefined> print(nsIPrintSettings aPrintSettings);
* These methods implement the nsIWebNavigation methods of the same names
undefined goBack(optional long aCancelContentJSEpoch, optional boolean aRequireUserInteraction = false, optional boolean aUserActivation = false);
undefined goForward(optional long aCancelContentJSEpoch, optional boolean aRequireUserInteraction = false, optional boolean aUserActivation = false);
undefined goToIndex(long aIndex, optional long aCancelContentJSEpoch, optional boolean aUserActivation = false);
undefined reload(unsigned long aReloadFlags);
undefined stop(unsigned long aStopFlags);
readonly attribute nsISHistory? sessionHistory;
readonly attribute nsISHEntry? activeSessionHistoryEntry;
readonly attribute MediaController? mediaController;
undefined resetScalingZoom();
// The current URI loaded in this BrowsingContext according to nsDocShell.
// This may not match the current window global's document URI in some cases.
readonly attribute URI? currentURI;
undefined clearRestoreState();
// Force this browsing context, which must correspond to an app window, to
// be active regardless of the window being minimized or fully occluded.
[SetterThrows] attribute boolean forceAppWindowActive;
// @see BrowsingContext.isActive.
[SetterThrows] attribute boolean isActive;
* This allows chrome to override the default choice of whether touch events
* are available in a specific BrowsingContext and its descendents.
[SetterThrows] inherit attribute TouchEventsOverride touchEventsOverride;
* Set to true to configure the top-level BrowsingContext to default-target
* user-initiated link clicks to _blank.
[SetterThrows] inherit attribute boolean targetTopLevelLinkClicksToBlank;
* Set the cross-group opener of this BrowsingContext. This tracks the opener
* of a browsing context regardless if that context is opened using noopener.
* This value will be automatically set for documents created using
* ``.
attribute CanonicalBrowsingContext? crossGroupOpener;
readonly attribute boolean isReplaced;
* Notify APZ to start autoscrolling.
* (aAnchorX, aAnchorY) are the coordinates of the autoscroll anchor, in
* device coordinates relative to the screen.
* aScrollId and aPresShellId identify the scroll frame that content chose to
* scroll.
* Returns whether we were successfully able to notify APZ.
* If this function returns true, APZ (which may live in another process) may
* still reject the autoscroll, but it's then APZ's responsibility to notify
* content via an "autoscroll-rejected-by-apz" message.
boolean startApzAutoscroll(float aAnchorX, float aAnchorY,
unsigned long long aScrollId,
unsigned long aPresShellId);
* Notify APZ to stop autoscrolling.
undefined stopApzAutoscroll(unsigned long long aScrollId,
unsigned long aPresShellId);
readonly attribute nsISHEntry? mostRecentLoadingSessionHistoryEntry;
* Indicates if the embedder element or an ancestor has hidden
* visibility, or no frame.
readonly attribute boolean isUnderHiddenEmbedderElement;
[Exposed=Window, ChromeOnly]
interface BrowsingContextGroup {
sequence<BrowsingContext> getToplevels();
readonly attribute unsigned long long id;