| # Defines properties which are available on the Settings object. |
| # |
| # Please think carefully before adding a new Setting. Some questions to |
| # consider are: |
| # - Should this be a RuntimeEnabledFeature instead? Settings are for things |
| # which we support either values of at runtime. Features are set at renderer |
| # process startup and are never changed. Features also tend to be set to a |
| # value based on the platform or the stability of the code in question, where |
| # as settings both codepaths need to be stable. |
| # - How will you ensure test coverage of all relevant values of your setting? |
| # - Is the default value appropriate for other platforms or ports which may |
| # not be aware of your setting? |
| # - Can your setting result in behavior differences observable to web |
| # developers? |
| # - Should this setting ideally be removed in the future? If so please file |
| # a bug and reference it in the comments for your setting. |
| # |
| # One reason to add a Setting is to manage the risk associated with adding a |
| # new feature. For example, we may choose to ship a new UI behavior or |
| # performance optimization to ChromeOS users first (in order to gather feedback |
| # and metrics on its use from the wild) before attempting to ship it to |
| # Windows. |
| # |
| # FIXME: Add support for global settings. |
| # FIXME: Add support for custom getters/setters. |
| |
| defaultTextEncodingName type=String |
| |
| # Do not hide chars typed in password fields immediately, but let the last char stay |
| # visible for N seconds, configured by the passwordEchoDurationInSeconds setting |
| # FIXME: Enable automatically if passwordEchoDurationInSeconds is set to a positive value. |
| passwordEchoEnabled initial=false |
| |
| # Configure how long the last char should say visible in seconds. |
| passwordEchoDurationInSeconds type=double, initial=1 |
| |
| # Sets the magnification value for validation message timer. If the |
| # magnification value is N, a validation message disappears automatically after |
| # <message length> * N / 1000 seconds. If N is equal to or less than 0, a |
| # validation message doesn't disappears automaticaly. |
| validationMessageTimerMagnification type=int, initial=50 |
| |
| # Number of pixels below which 2D canvas is rendered in software |
| # even if hardware acceleration is enabled. |
| # Hardware acceleration is useful for large canvases where it can avoid the |
| # pixel bandwidth between the CPU and GPU. But GPU acceleration comes at |
| # a price - extra back-buffer and texture copy. Small canvases are also |
| # widely used for stylized fonts. Anti-aliasing text in hardware at that |
| # scale is generally slower. So below a certain size it is better to |
| # draw canvas in software. |
| minimumAccelerated2dCanvasSize type=int, initial=257*256 |
| |
| minimumFontSize type=int, initial=0, invalidate=Style |
| minimumLogicalFontSize type=int, initial=0, invalidate=Style |
| defaultFontSize type=int, initial=0, invalidate=Style |
| defaultFixedFontSize type=int, initial=0, invalidate=Style |
| |
| editingBehaviorType type=EditingBehaviorType, initial=editingBehaviorTypeForPlatform() |
| |
| caretBrowsingEnabled initial=false |
| localStorageEnabled initial=false |
| allowUniversalAccessFromFileURLs initial=true |
| allowFileAccessFromFileURLs initial=true |
| javaScriptCanOpenWindowsAutomatically initial=false |
| supportsMultipleWindows initial=true |
| javaScriptCanAccessClipboard initial=false |
| shouldPrintBackgrounds initial=false |
| shouldClearDocumentBackground initial=true |
| |
| textAreasAreResizable initial=false, invalidate=Style |
| acceleratedCompositingEnabled initial=true, invalidate=AcceleratedCompositing |
| |
| offlineWebApplicationCacheEnabled initial=true |
| usesEncodingDetector initial=false |
| allowScriptsToCloseWindows initial=false |
| |
| # FIXME: This should really be disabled by default as it makes platforms that |
| # don't support the feature download files they can't use by. |
| # Leaving enabled for now to not change existing behavior. |
| downloadableBinaryFontsEnabled initial=true |
| |
| xssAuditorEnabled initial=false |
| unsafePluginPastingEnabled initial=false |
| |
| preferCompositingToLCDTextEnabled initial=false, invalidate=AcceleratedCompositing |
| |
| # 3D canvas (WebGL) support. |
| webGLEnabled initial=false |
| |
| webGLErrorsToConsoleEnabled initial=true |
| accelerated2dCanvasEnabled initial=false |
| antialiased2dCanvasEnabled initial=true |
| antialiasedClips2dCanvasEnabled initial=false |
| accelerated2dCanvasMSAASampleCount type=int, initial=0 |
| |
| # WebAudio support. |
| webAudioEnabled initial=false |
| |
| asynchronousSpellCheckingEnabled initial=false |
| |
| hyperlinkAuditingEnabled initial=false |
| allowDisplayOfInsecureContent initial=true |
| allowRunningOfInsecureContent initial=true |
| |
| mediaControlsOverlayPlayButtonEnabled initial=false |
| mediaPlaybackRequiresUserGesture initial=false |
| |
| scrollAnimatorEnabled initial=true |
| |
| # Used to disable threaded, compositor scrolling for testing purposes. |
| # crbug.com/410974 tracks removal once alternative solutions for selective |
| # main thread scrolling are supported. |
| threadedScrollingEnabled initial=true, invalidate=Style |
| |
| # Handles frame-level scrolls via the root Layer instead of the FrameView. |
| # crbug.com/417782 tracks enabling this by default. |
| rootLayerScrolls initial=false |
| |
| # Used in layout tests for gesture tap highlights. Makes the highlights square |
| # (rather than rounded) to make it possible to reftest the results. |
| mockGestureTapHighlightsEnabled initial=false |
| |
| shouldRespectImageOrientation initial=false |
| |
| # Limited use by features which behave differently depending on the input |
| # devices available. For example, the pointer and hover media queries. |
| # Note that we need to be careful when basing behavior or UI on this - |
| # just because a device is present doesn't mean the user cares about it |
| # or uses it (i.e. Chromebook Pixel users generally don't want to give up |
| # screen real estate just because they happen to have a touchscreen). |
| deviceSupportsTouch initial=false |
| deviceSupportsMouse initial=true |
| |
| # This value indicates the number of simultaneous multi-touch points supported |
| # by the currently connected screen/digitizer that supports the most points. |
| # From Pointer Events spec: |
| # http://www.w3.org/TR/pointerevents/#widl-Navigator-maxTouchPoints |
| maxTouchPoints type=int, initial=0 |
| |
| # Whether touch gestures should be "fuzzed" to nearest touch targets. |
| # It's expected that this is enabled everywhere by default, but it may be |
| # disabled for testing purposes as the algorithm is not yet perfect. |
| # crbug.com/304895 tracks removal once we're satisfied with the algorithm. |
| touchAdjustmentEnabled initial=true |
| |
| # Determines whether WebViewClient::didTapMultipleTargets will be used for |
| # touch disambiguation. |
| multiTargetTapNotificationEnabled initial=true |
| |
| syncXHRInDocumentsEnabled initial=true |
| cookieEnabled initial=true |
| navigateOnDragDrop initial=true |
| DOMPasteAllowed initial=false |
| |
| allowCustomScrollbarInMainFrame initial=true |
| webSecurityEnabled initial=true |
| |
| # Special keyboard navigation mode intented for platforms with no |
| # proper mouse or touch support, such as a TV controller with a remote. |
| spatialNavigationEnabled initial=false |
| |
| # This setting adds a means to enable/disable touch initiated drag & drop. If |
| # enabled, the user can initiate drag using long press. |
| # crbug.com/304894 tracks removal once it's been enabled on all platforms. |
| touchDragDropEnabled initial=false |
| |
| unifiedTextCheckerEnabled initial=false |
| |
| # Some apps could have a default video poster if it is not set. |
| defaultVideoPosterURL type=String |
| |
| smartInsertDeleteEnabled initial=false |
| selectTrailingWhitespaceEnabled initial=defaultSelectTrailingWhitespaceEnabled |
| |
| selectionIncludesAltImageText initial=false |
| |
| selectionStrategy type=SelectionStrategy, initial=SelectionStrategy::Character |
| |
| ######## Settings used by Android WebView below ######## |
| |
| useLegacyBackgroundSizeShorthandBehavior initial=false |
| |
| # This quirk is to maintain compatibility with Android apps built on |
| # the Android SDK prior to and including version 18. |
| # Presumably, this can be removed any time after 2015. |
| # See http://crbug.com/282130. |
| viewportMetaZeroValuesQuirk initial=false |
| |
| # Another Android SDK <= 18 quirk, removable 2015. |
| # See http://crbug.com/295287 |
| ignoreMainFrameOverflowHiddenQuirk initial=false |
| |
| # Yet another Android SDK <= 18 quirk, removable 2015. |
| # See http://crbug.com/305236 |
| reportScreenSizeInPhysicalPixelsQuirk initial=false |
| |
| # One more Android SDK <= 18 quirk, removable 2015. |
| # See http://crbug.com/306548 |
| viewportMetaMergeContentQuirk initial=false |
| |
| # This quirk is to maintain compatibility with Android apps. |
| # It will be possible to remove it once WebSettings.{get|set}UseWideViewPort |
| # API function will be removed. |
| # See http://crbug.com/288037. |
| wideViewportQuirkEnabled initial=false |
| |
| # Used by the android_webview to support a horizontal height auto-sizing |
| # mode. |
| forceZeroLayoutHeight initial=false, invalidate=ViewportDescription |
| |
| mainFrameClipsContent initial=true |
| |
| # For android.webkit.WebSettings.setUseWideViewport() |
| # http://developer.android.com/reference/android/webkit/WebSettings.html#setUseWideViewPort(boolean) |
| useWideViewport initial=true, invalidate=ViewportDescription |
| |
| # For android.webkit.WebSettings.setLoadWithOverviewMode() |
| # http://developer.android.com/reference/android/webkit/WebSettings.html#setLoadWithOverviewMode(boolean) |
| loadWithOverviewMode initial=true, invalidate=ViewportDescription |
| |
| ######## End of settings used by Android WebView ######## |
| |
| |
| # Touch based text selection and editing on desktop. |
| # crbug.com/304873 tracks removal once it's been enabled on all platforms. |
| touchEditingEnabled initial=false |
| |
| # Settings for experimental desktop pinch-zoom support (with semantics |
| # optimized for large screens). Pinch-zoom generally is implemented mainly |
| # outside of blink (in the compositor) and doesn't require any settings. |
| # These settings are for an experimental modification to how pinch-zoom |
| # behaves. crbug.com/304869 tracks removal. |
| useSolidColorScrollbars initial=false |
| pinchOverlayScrollbarThickness type=int, initial=0 |
| |
| # Experiment to invert the scroll order of the layout and visual viewports |
| # in some circumstances. Namely, during a pinch-zoom gesture and browser |
| # generated scrolls like "scroll into view". |
| invertViewportScrollOrder initial=false |
| |
| # Experiment to have all APIs reflect the layout viewport. |
| # crbug.com/489206 tracks the experiment. |
| inertVisualViewport initial=false |
| |
| # The rubber-band overscroll effect is implemented in Blink and is being moved |
| # to the compositor thread. This will be set to true and eventually removed. |
| # crbug.com/133097 |
| rubberBandingOnCompositorThread initial=false |
| |
| # Font scale factor for accessibility, applied as part of text autosizing. |
| accessibilityFontScaleFactor type=double, initial=1.0, invalidate=TextAutosizing |
| |
| # Only used by Layout Tests and inspector emulation. |
| mediaTypeOverride type=String, initial="", invalidate=MediaQuery |
| displayModeOverride type=WebDisplayMode, initial=WebDisplayModeUndefined, invalidate=MediaQuery |
| |
| # loadsImagesAutomatically only suppresses the network load of |
| # the image URL. A cached image will still be rendered if requested. |
| loadsImagesAutomatically initial=false, invalidate=ImageLoading |
| imagesEnabled initial=true, invalidate=ImageLoading |
| imageAnimationPolicy type=ImageAnimationPolicy, initial=ImageAnimationPolicyAllowed |
| |
| # Number of outstanding and pending tokens allowed in the background HTML |
| # parser. A value of 0 indicates the parser should use its default value. |
| backgroundHtmlParserOutstandingTokenLimit type=unsigned, initial=0 |
| backgroundHtmlParserPendingTokenLimit type=unsigned, initial=0 |
| |
| # Html preload scanning is a fast, early scan of HTML documents to find loadable |
| # resources before the parser advances to them. If it is disabled, resources will |
| # be loaded later. |
| doHtmlPreloadScanning initial=true |
| |
| pluginsEnabled initial=false |
| |
| viewportEnabled initial=false, invalidate=ViewportDescription |
| viewportMetaEnabled initial=false |
| |
| dnsPrefetchingEnabled initial=false, invalidate=DNSPrefetching |
| |
| # FIXME: This is a temporary flag and should be removed |
| # when squashing is ready. (crbug.com/261605) |
| layerSquashingEnabled initial=false |
| |
| # Clients that execute script should call ScriptController::canExecuteScripts() |
| # instead of this function. ScriptController::canExecuteScripts() checks the |
| # HTML sandbox, plugin sandboxing, and other important details. |
| scriptEnabled initial=false |
| |
| # Compensates for poor text legibility on mobile devices. This value is |
| # multiplied by the font scale factor when performing text autosizing of |
| # websites that do not set an explicit viewport description. |
| deviceScaleAdjustment type=double, initial=1.0, invalidate=TextAutosizing |
| |
| # This value indicates the maximum number of bytes a document is allowed |
| # to transmit in Beacons (via navigator.sendBeacon()) -- Beacons are |
| # intended to be smaller payloads transmitted as a page is unloading, not |
| # a general (one-way) network transmission API. |
| # The spec ( https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/Beacon/Overview.html ) |
| # does not proscribe an upper limit, but allows for it -- the underlying |
| # API will return 'false' in that case. |
| maxBeaconTransmission type=int, initial=65536 |
| |
| # This value is set to false if the platform does not support fullscreen. |
| # When set to false all the requests to enter fullscreen will return an error |
| # (fullscreenerror or webkitfullscreenerror) as specified in the standard: |
| # http://fullscreen.spec.whatwg.org/#dom-element-requestfullscreen |
| fullscreenSupported initial=true |
| |
| # V8 supports different types of caching. Used by V8 bindings. |
| v8CacheOptions type=V8CacheOptions, initial=V8CacheOptionsDefault |
| |
| # These values are bit fields for the properties of available pointing devices |
| # and may take on multiple values (e.g. laptop with touchpad and touchscreen |
| # has pointerType coarse *and* fine). |
| availablePointerTypes type=int, initial=PointerTypeNone, invalidate=MediaQuery |
| availableHoverTypes type=int, initial=HoverTypeNone, invalidate=MediaQuery |
| |
| # These values specify properties of the user's primary pointing device only. |
| primaryPointerType type=PointerType, initial=PointerTypeNone, invalidate=MediaQuery |
| primaryHoverType type=HoverType, initial=HoverTypeNone, invalidate=MediaQuery |
| |
| # Whether accessibility support is enabled at all. |
| accessibilityEnabled initial=false, invalidate=AccessibilityState |
| |
| # If true, the value in password fields is exposed to assistive technologies. |
| accessibilityPasswordValuesEnabled initial=false |
| |
| # If true, static text nodes expose inline text box children. |
| inlineTextBoxAccessibilityEnabled initial=false |
| |
| # If true, context menu will be shown on mouse up instead of mouse down. |
| # Typically enabled on Windows to match platform convention. |
| showContextMenuOnMouseUp initial=false |
| |
| disableReadingFromCanvas initial=false |
| strictMixedContentChecking initial=false |
| strictMixedContentCheckingForPlugin initial=false |
| strictPowerfulFeatureRestrictions initial=false |
| strictlyBlockBlockableMixedContent initial=false |
| logDnsPrefetchAndPreconnect initial=false |
| logPreload initial=false |
| |
| # If true, the UA styles will include viewportAndroid.css. It is used for |
| # Android, and dynamically set by the inspector for mobile emulation. |
| useMobileViewportStyle initial=false, invalidate=ViewportRule |
| |
| # Automatic track selection is performed based on user preference for track kind specified |
| # by this setting. |
| textTrackKindUserPreference type=TextTrackKindUserPreference, initial=TextTrackKindUserPreference::Default, invalidate=TextTrackKindUserPreference |
| |
| # User style overrides for captions and subtitles |
| textTrackBackgroundColor type=String |
| textTrackFontFamily type=String |
| textTrackFontStyle type=String |
| textTrackFontVariant type=String |
| textTrackTextColor type=String |
| textTrackTextShadow type=String |
| textTrackTextSize type=String |
| |
| lowPriorityIframes initial=false |
| |
| reportWheelOverscroll initial=false |
| |
| mainResourceOnlyProgress initial=false |
| |
| # Do we want to try to save screen real estate in the media player by hiding |
| # the volume slider / mute button? |
| preferHiddenVolumeControls initial=false |
| |
| # Controls for resource fetch prioritization. |
| # Overall rationale and details here: https://docs.google.com/document/d/1bCDuq9H1ih9iNjgzyAL0gpwNFiEP4TZS-YLRp_RuMlc/edit?usp=sharing |
| fetchDeferLateScripts initial=false |
| fetchIncreaseFontPriority initial=false |
| fetchIncreaseAsyncScriptPriority initial=false |
| # Increases the priorities for CSS, Scripts, Fonts and Images all by one level |
| # and parser-blocking scripts and visible images by 2. |
| # This is used in conjunction with logic on the Chrome side to raise the threshold |
| # of "layout-blocking" resources and provide a boost to resources that are needed |
| # as soon as possible for something currently on the screen. |
| fetchIncreasePriorities initial=false |
| |
| # The autoplay gesture override experiment is described in crbug.com/487345 . |
| autoplayExperimentMode type=String, initial="off" |
