Convert Settings.in, CSSValueKeywords.in, SVGCSSValueKeywords.in to json5

third_party/WebKit/Source/core/frame/Settings.in

-# 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()
-
-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
-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
-
-preferCompositingToLCDTextEnabled initial=false, invalidate=AcceleratedCompositing
-
-# 3D canvas (WebGL) support.
-webGLEnabled initial=false
-
-webGLErrorsToConsoleEnabled initial=true
-antialiased2dCanvasEnabled initial=true
-antialiasedClips2dCanvasEnabled initial=true
-accelerated2dCanvasMSAASampleCount type=int, initial=0
-
-hyperlinkAuditingEnabled initial=false
-allowRunningOfInsecureContent initial=true
-
-mediaControlsOverlayPlayButtonEnabled initial=false
-mediaPlaybackRequiresUserGesture initial=false
-
-# This flags overrides mediaPlaybackRequiresUserGesture
-crossOriginMediaPlaybackRequiresUserGesture initial=false
-
-presentationRequiresUserGesture initial=true
-
-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
-
-# 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
-
-# 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
-
-# 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
-
-# Used by android_webview to support legacy apps that inject script into a top-level initial empty
-# document and expect it to persist on navigation, even though the origin is unique. Note that this
-# behavior violates the requirements described by [Initialising a new Document object] in
-# https://html.spec.whatwg.org/multipage/browsers.html#navigating-across-documents.
-shouldReuseGlobalForUnownedMainFrame initial=false
-
-######## 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
-
-# If true, scrollers will use overlay scrollbars.  These do not take up any
-# layout width, are drawn using solid color quads by the compositor, and fade away
-# after a timeout.
-useSolidColorScrollbars 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, invalidate=ViewportDescription
-
-dnsPrefetchingEnabled initial=false, invalidate=DNSPrefetching
-
-dataSaverEnabled initial=false
-
-# 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
-
-# Forces initialization of main world, even if no scripts will be executed.
-# Used by inspector to report all contexts.
-forceMainWorldInitialization initial=false, invalidate=DOMWorlds
-
-# 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://w3c.github.io/beacon/> 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
-
-# V8 code cache for CacheStorage supports three types of strategies (none, normal and aggressive).
-v8CacheStrategiesForCacheStorage type=V8CacheStrategiesForCacheStorage, initial=V8CacheStrategiesForCacheStorage::Default
-
-# 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
-
-# If true, context menu will be shown on any long press event.
-# Used on Android to prevent a context menu from being shown in certain situations
-# (i.e. long pressing an empty div)
-alwaysShowContextMenuOnTouch initial=true
-
-disableReadingFromCanvas initial=false
-strictMixedContentChecking initial=false
-strictMixedContentCheckingForPlugin initial=false
-strictPowerfulFeatureRestrictions initial=false
-strictlyBlockBlockableMixedContent initial=false
-allowGeolocationOnInsecureOrigins initial=false
-logDnsPrefetchAndPreconnect initial=false
-logPreload initial=false
-
-# These values specify the UA intial viewport style.
-# It is dynamically set by the inspector for mobile emulation and can be
-# used by content embedders to specify custom style on certain platforms.
-viewportStyle type=WebViewportStyle, initial=WebViewportStyle::Default, 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
-
-# Margin for title-safe placement of cues with overscan, gives top and bottom margin size as
-# percentage of video element height (for horizontal text) into which cues will not be placed.
-textTrackMarginPercentage type=double, initial=0
-
-lowPriorityIframes initial=false
-
-progressBarCompletion type=ProgressBarCompletion, initial=ProgressBarCompletion::LoadEvent
-
-historyEntryRequiresUserGesture 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
-
-# Whether to disallow network fetches for parser blocking scripts in the main
-# frame inserted via document.write, for users on 2G or connections that are
-# effectively 2G.
-disallowFetchForDocWrittenScriptsInMainFrameIfEffectively2G initial=false
-
-# Whether to disallow network fetches for parser blocking scripts in the main
-# frame inserted via document.write, for users on slow connections.
-disallowFetchForDocWrittenScriptsInMainFrameOnSlowConnections initial=false
-
-# Whether to disallow network fetches for parser blocking scripts in the main
-# frame inserted via document.write, regardless of connection type.
-disallowFetchForDocWrittenScriptsInMainFrame initial=false
-
-# Whether to invalidate device-dependent media queries and restore scroll positions
-# on frame resize assuming device rotation.
-mainFrameResizesAreOrientationChanges initial=false
-
-# Ability to override the default 'passive' value in AddEventListenerOptions. This
-# is useful to demonstrate the power of passive event listeners. This can be removed
-# when there is greater adoption, interventions to force it on and associated devtools
-# to enable it have been shipped.
-passiveListenerDefault type=PassiveListenerDefault, initial=PassiveListenerDefault::False
-
-# Use default interpolation quality to scale bitmap images if quality is not determined
-# in other ways. This can help us writing reftests containing scaled images.
-useDefaultImageInterpolationQuality initial=false
-
-# Variant of the ParseHTMLOnMainThread experiment. One experiment immediately
-# tokenizes input bytes. The default is to tokenize with a post task.
-parseHTMLOnMainThreadSyncTokenize initial=false
-
-# Variant of the ParseHTMLOnMainThread experiment. This is designed to coalesce
-# TokenizedChunks when the experiment is running in threaded mode.
-parseHTMLOnMainThreadCoalesceChunks initial=false
-
-# Whether the CSSPreloadScanner is used for externally CSS preloads. NoPreload
-# indicates that the scanner will be used, but no preloads issued.
-cssExternalScannerNoPreload initial=false
-cssExternalScannerPreload initial=false
-
-browserSideNavigationEnabled initial=false
-
-# Some platforms have media subsystems which are too buggy to allow preloading
-# of content by default. See http://crbug.com/612909 for details.
-forcePreloadNoneForMediaElements initial=false
-
-hideScrollbars initial=false
-
-# Spellchecking is enabled by default for elements that do not specify it explicitly
-# using the "spellcheck" attribute.
-spellCheckEnabledByDefault initial=true
-
-# Whether download UI should be hidden for the current page content.
-hideDownloadUI initial=false
-
-# Whether or not to issue range requests for images and show placeholders.
-fetchImagePlaceholders initial=false
-
-# Whether the frame is a presentation receiver and should expose
-# `navigator.presentation.receiver`.
-presentationReceiver initial=false