GeckoBindings.h - mozsearch

/* -*- 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/. */

/* FFI functions for Servo to call into Gecko */

#ifndef mozilla_GeckoBindings_h

#define mozilla_GeckoBindings_h

#include <stdint.h>

#include "mozilla/ServoTypes.h"

#include "mozilla/ServoBindingTypes.h"

#include "mozilla/css/DocumentMatchingFunction.h"

#include "mozilla/css/SheetLoadData.h"

#include "mozilla/dom/Document.h"

#include "mozilla/EffectCompositor.h"

#include "mozilla/PreferenceSheet.h"

#include "nsStyleStruct.h"

#include "COLRFonts.h"

class nsAtom;

class nsIURI;

class nsSimpleContentList;

struct nsFont;

class ServoComputedData;

}  // namespace mozilla

#ifdef NIGHTLY_BUILD

const bool GECKO_IS_NIGHTLY = true;

#else

const bool GECKO_IS_NIGHTLY = false;

#endif

#define NS_DECL_THREADSAFE_FFI_REFCOUNTING(class_, name_)  \

  void Gecko_AddRef##name_##ArbitraryThread(class_* aPtr); \

  void Gecko_Release##name_##ArbitraryThread(class_* aPtr);

#define NS_IMPL_THREADSAFE_FFI_REFCOUNTING(class_, name_)                      \

  static_assert(class_::HasThreadSafeRefCnt::value,                            \

                "NS_DECL_THREADSAFE_FFI_REFCOUNTING can only be used with "    \

                "classes that have thread-safe refcounting");                  \

  void Gecko_AddRef##name_##ArbitraryThread(class_* aPtr) { NS_ADDREF(aPtr); } \

  void Gecko_Release##name_##ArbitraryThread(class_* aPtr) { NS_RELEASE(aPtr); }

extern "C" {

NS_DECL_THREADSAFE_FFI_REFCOUNTING(nsIURI, nsIURI);

// Debugging stuff.

void Gecko_Element_DebugListAttributes(const mozilla::dom::Element*,

                                       nsCString*);

void Gecko_Snapshot_DebugListAttributes(const mozilla::ServoElementSnapshot*,

                                        nsCString*);

bool Gecko_IsSignificantChild(const nsINode*, bool whitespace_is_significant);

const nsINode* Gecko_GetLastChild(const nsINode*);

const nsINode* Gecko_GetFlattenedTreeParentNode(const nsINode*);

const mozilla::dom::Element* Gecko_GetBeforeOrAfterPseudo(

    const mozilla::dom::Element*, bool is_before);

const mozilla::dom::Element* Gecko_GetMarkerPseudo(

    const mozilla::dom::Element*);

nsTArray<nsIContent*>* Gecko_GetAnonymousContentForElement(

    const mozilla::dom::Element*);

void Gecko_DestroyAnonymousContentList(nsTArray<nsIContent*>* anon_content);

const nsTArray<RefPtr<nsINode>>* Gecko_GetAssignedNodes(

    const mozilla::dom::Element*);

void Gecko_GetQueryContainerSize(const mozilla::dom::Element*,

                                 nscoord* aOutWidth, nscoord* aOutHeight);

void Gecko_ComputedStyle_Init(mozilla::ComputedStyle* context,

                              const ServoComputedData* values,

                              mozilla::PseudoStyleType pseudo_type);

void Gecko_ComputedStyle_Destroy(mozilla::ComputedStyle* context);

// By default, Servo walks the DOM by traversing the siblings of the DOM-view

// first child. This generally works, but misses anonymous children, which we

// want to traverse during styling. To support these cases, we create an

// optional stack-allocated iterator in aIterator for nodes that need it.

void Gecko_ConstructStyleChildrenIterator(const mozilla::dom::Element*,

                                          mozilla::dom::StyleChildrenIterator*);

void Gecko_DestroyStyleChildrenIterator(mozilla::dom::StyleChildrenIterator*);

const nsINode* Gecko_GetNextStyleChild(mozilla::dom::StyleChildrenIterator*);

nsAtom* Gecko_Element_ImportedPart(const nsAttrValue*, nsAtom*);

nsAtom** Gecko_Element_ExportedParts(const nsAttrValue*, nsAtom*,

                                     size_t* aOutLength);

NS_DECL_THREADSAFE_FFI_REFCOUNTING(mozilla::css::SheetLoadDataHolder,

                                   SheetLoadDataHolder);

void Gecko_StyleSheet_FinishAsyncParse(

    mozilla::css::SheetLoadDataHolder* data,

    mozilla::StyleStrong<mozilla::StyleStylesheetContents> sheet_contents,

    mozilla::StyleUseCounters* use_counters);

mozilla::StyleSheet* Gecko_LoadStyleSheet(

    mozilla::css::Loader* loader, mozilla::StyleSheet* parent,

    mozilla::css::SheetLoadData* parent_load_data,

    mozilla::css::LoaderReusableStyleSheets* reusable_sheets,

    const mozilla::StyleCssUrl* url,

    mozilla::StyleStrong<mozilla::StyleLockedMediaList> media_list);

void Gecko_LoadStyleSheetAsync(

    mozilla::css::SheetLoadDataHolder* parent_data,

    const mozilla::StyleCssUrl* url,

    mozilla::StyleStrong<mozilla::StyleLockedMediaList>,

    mozilla::StyleStrong<mozilla::StyleLockedImportRule>);

// Selector Matching.

uint64_t Gecko_ElementState(const mozilla::dom::Element*);

bool Gecko_IsRootElement(const mozilla::dom::Element*);

bool Gecko_MatchLang(const mozilla::dom::Element*, nsAtom* override_lang,

                     bool has_override_lang, const char16_t* value);

nsAtom* Gecko_GetXMLLangValue(const mozilla::dom::Element*);

const mozilla::PreferenceSheet::Prefs* Gecko_GetPrefSheetPrefs(

    const mozilla::dom::Document*);

bool Gecko_IsTableBorderNonzero(const mozilla::dom::Element* element);

bool Gecko_IsSelectListBox(const mozilla::dom::Element* element);

// Attributes.

#define SERVO_DECLARE_ELEMENT_ATTR_MATCHING_FUNCTIONS(prefix_, implementor_) \

  nsAtom* prefix_##LangValue(implementor_ element);

bool Gecko_AttrEquals(const nsAttrValue*, const nsAtom*, bool aIgnoreCase);

bool Gecko_AttrDashEquals(const nsAttrValue*, const nsAtom*, bool aIgnoreCase);

bool Gecko_AttrIncludes(const nsAttrValue*, const nsAtom*, bool aIgnoreCase);

bool Gecko_AttrHasSubstring(const nsAttrValue*, const nsAtom*,

                            bool aIgnoreCase);

bool Gecko_AttrHasPrefix(const nsAttrValue*, const nsAtom*, bool aIgnoreCase);

bool Gecko_AttrHasSuffix(const nsAttrValue*, const nsAtom*, bool aIgnoreCase);

bool Gecko_AssertClassAttrValueIsSane(const nsAttrValue*);

const nsAttrValue* Gecko_GetSVGAnimatedClass(const mozilla::dom::Element*);

SERVO_DECLARE_ELEMENT_ATTR_MATCHING_FUNCTIONS(Gecko_,

                                              const mozilla::dom::Element*)

SERVO_DECLARE_ELEMENT_ATTR_MATCHING_FUNCTIONS(

    Gecko_Snapshot, const mozilla::ServoElementSnapshot*)

#undef SERVO_DECLARE_ELEMENT_ATTR_MATCHING_FUNCTIONS

// Style attributes.

const mozilla::StyleLockedDeclarationBlock* Gecko_GetStyleAttrDeclarationBlock(

    const mozilla::dom::Element* element);

void Gecko_UnsetDirtyStyleAttr(const mozilla::dom::Element* element);

const mozilla::StyleLockedDeclarationBlock*

Gecko_GetHTMLPresentationAttrDeclarationBlock(

    const mozilla::dom::Element* element);

const mozilla::StyleLockedDeclarationBlock*

Gecko_GetExtraContentStyleDeclarations(const mozilla::dom::Element* element);

const mozilla::StyleLockedDeclarationBlock*

Gecko_GetUnvisitedLinkAttrDeclarationBlock(

    const mozilla::dom::Element* element);

const mozilla::StyleLockedDeclarationBlock*

Gecko_GetVisitedLinkAttrDeclarationBlock(const mozilla::dom::Element* element);

const mozilla::StyleLockedDeclarationBlock*

Gecko_GetActiveLinkAttrDeclarationBlock(const mozilla::dom::Element* element);

// Visited handling.

// Returns whether visited styles are enabled for a given document.

bool Gecko_VisitedStylesEnabled(const mozilla::dom::Document*);

// Animations

bool Gecko_GetAnimationRule(

    const mozilla::dom::Element* aElementOrPseudo,

    mozilla::EffectCompositor::CascadeLevel aCascadeLevel,

    mozilla::StyleAnimationValueMap* aAnimationValues);

bool Gecko_StyleAnimationsEquals(

    const nsStyleAutoArray<mozilla::StyleAnimation>*,

    const nsStyleAutoArray<mozilla::StyleAnimation>*);

bool Gecko_StyleScrollTimelinesEquals(

    const nsStyleAutoArray<mozilla::StyleScrollTimeline>*,

    const nsStyleAutoArray<mozilla::StyleScrollTimeline>*);

bool Gecko_StyleViewTimelinesEquals(

    const nsStyleAutoArray<mozilla::StyleViewTimeline>*,

    const nsStyleAutoArray<mozilla::StyleViewTimeline>*);

void Gecko_UpdateAnimations(const mozilla::dom::Element* aElementOrPseudo,

                            const mozilla::ComputedStyle* aOldComputedValues,

                            const mozilla::ComputedStyle* aComputedValues,

                            mozilla::UpdateAnimationsTasks aTasks);

size_t Gecko_GetAnimationEffectCount(

    const mozilla::dom::Element* aElementOrPseudo);

bool Gecko_ElementHasAnimations(const mozilla::dom::Element* aElementOrPseudo);

bool Gecko_ElementHasCSSAnimations(

    const mozilla::dom::Element* aElementOrPseudo);

bool Gecko_ElementHasCSSTransitions(

    const mozilla::dom::Element* aElementOrPseudo);

bool Gecko_ElementHasWebAnimations(

    const mozilla::dom::Element* aElementOrPseudo);

size_t Gecko_ElementTransitions_Length(

    const mozilla::dom::Element* aElementOrPseudo);

nsCSSPropertyID Gecko_ElementTransitions_PropertyAt(

    const mozilla::dom::Element* aElementOrPseudo, size_t aIndex);

const mozilla::StyleAnimationValue* Gecko_ElementTransitions_EndValueAt(

    const mozilla::dom::Element* aElementOrPseudo, size_t aIndex);

double Gecko_GetProgressFromComputedTiming(const mozilla::ComputedTiming*);

double Gecko_GetPositionInSegment(const mozilla::AnimationPropertySegment*,

                                  double aProgress, bool aBeforeFlag);

// Get servo's AnimationValue for |aProperty| from the cached base style

// |aBaseStyles|.

// |aBaseStyles| is nsRefPtrHashtable<nsGenericHashKey<AnimatedPropertyID>,

// StyleAnimationValue>.

// We use RawServoAnimationValueTableBorrowed to avoid exposing

// nsRefPtrHashtable in FFI.

const mozilla::StyleAnimationValue* Gecko_AnimationGetBaseStyle(

    const RawServoAnimationValueTable* aBaseStyles,

    const mozilla::AnimatedPropertyID* aProperty);

void Gecko_StyleTransition_SetUnsupportedProperty(

    mozilla::StyleTransition* aTransition, nsAtom* aAtom);

// Atoms.

nsAtom* Gecko_Atomize(const char* aString, uint32_t aLength);

nsAtom* Gecko_Atomize16(const nsAString* aString);

void Gecko_AddRefAtom(nsAtom* aAtom);

void Gecko_ReleaseAtom(nsAtom* aAtom);

// will not run destructors on dst, give it uninitialized memory

// font_id is LookAndFeel::FontID

void Gecko_nsFont_InitSystem(nsFont* dst, mozilla::StyleSystemFont font_id,

                             const nsStyleFont* font,

                             const mozilla::dom::Document*);

void Gecko_nsFont_Destroy(nsFont* dst);

// The gfxFontFeatureValueSet returned from this function has zero reference.

gfxFontFeatureValueSet* Gecko_ConstructFontFeatureValueSet();

nsTArray<uint32_t>* Gecko_AppendFeatureValueHashEntry(

    gfxFontFeatureValueSet* value_set, nsAtom* family, uint32_t alternate,

    nsAtom* name);

// Font variant alternates

void Gecko_ClearAlternateValues(nsFont* font, size_t length);

void Gecko_AppendAlternateValues(nsFont* font, uint32_t alternate_name,

                                 nsAtom* atom);

void Gecko_CopyAlternateValuesFrom(nsFont* dest, const nsFont* src);

// The FontPaletteValueSet returned from this function has zero reference.

mozilla::gfx::FontPaletteValueSet* Gecko_ConstructFontPaletteValueSet();

mozilla::gfx::FontPaletteValueSet::PaletteValues*

Gecko_AppendPaletteValueHashEntry(

    mozilla::gfx::FontPaletteValueSet* aPaletteValueSet, nsAtom* aFamily,

    nsAtom* aName);

void Gecko_SetFontPaletteBase(

    mozilla::gfx::FontPaletteValueSet::PaletteValues* aValues,

    int32_t aBasePaletteIndex);

void Gecko_SetFontPaletteOverride(

    mozilla::gfx::FontPaletteValueSet::PaletteValues* aValues, int32_t aIndex,

    mozilla::StyleAbsoluteColor* aColor);

// Visibility style

void Gecko_SetImageOrientation(nsStyleVisibility* aVisibility,

                               uint8_t aOrientation, bool aFlip);

void Gecko_SetImageOrientationAsFromImage(nsStyleVisibility* aVisibility);

void Gecko_CopyImageOrientationFrom(nsStyleVisibility* aDst,

                                    const nsStyleVisibility* aSrc);

// list-style-image style.

void Gecko_SetListStyleImageNone(nsStyleList* style_struct);

void Gecko_SetListStyleImageImageValue(

    nsStyleList* style_struct, const mozilla::StyleComputedImageUrl* url);

void Gecko_CopyListStyleImageFrom(nsStyleList* dest, const nsStyleList* src);

// Dirtiness tracking.

void Gecko_NoteDirtyElement(const mozilla::dom::Element*);

void Gecko_NoteDirtySubtreeForInvalidation(const mozilla::dom::Element*);

void Gecko_NoteAnimationOnlyDirtyElement(const mozilla::dom::Element*);

bool Gecko_AnimationNameMayBeReferencedFromStyle(const nsPresContext*,

                                                 nsAtom* name);

float Gecko_GetScrollbarInlineSize(const nsPresContext*);

// Retrive pseudo type from an element.

mozilla::PseudoStyleType Gecko_GetImplementedPseudoType(

    const mozilla::dom::Element*);

// Retrive pseudo identifier from an element if any.

nsAtom* Gecko_GetImplementedPseudoIdentifier(const mozilla::dom::Element*);

// We'd like to return `nsChangeHint` here, but bindgen bitfield enums don't

// work as return values with the Linux 32-bit ABI at the moment because

// they wrap the value in a struct.

uint32_t Gecko_CalcStyleDifference(const mozilla::ComputedStyle* old_style,

                                   const mozilla::ComputedStyle* new_style,

                                   bool* any_style_struct_changed,

                                   bool* reset_only_changed);

nscoord Gecko_CalcLineHeight(const mozilla::StyleLineHeight*,

                             const nsPresContext*, bool aVertical,

                             const nsStyleFont* aAgainstFont,

                             const mozilla::dom::Element* aElement);

// Get an element snapshot for a given element from the table.

const mozilla::ServoElementSnapshot* Gecko_GetElementSnapshot(

    const mozilla::ServoElementSnapshotTable* table,

    const mozilla::dom::Element*);

// Have we seen this pointer before?

bool Gecko_HaveSeenPtr(mozilla::SeenPtrs* table, const void* ptr);

void Gecko_EnsureImageLayersLength(nsStyleImageLayers* layers, size_t len,

                                   nsStyleImageLayers::LayerType layer_type);

void Gecko_EnsureStyleAnimationArrayLength(void* array, size_t len);

void Gecko_EnsureStyleTransitionArrayLength(void* array, size_t len);

void Gecko_EnsureStyleScrollTimelineArrayLength(void* array, size_t len);

void Gecko_EnsureStyleViewTimelineArrayLength(void* array, size_t len);

// Searches from the beginning of |keyframes| for a Keyframe object with the

// specified offset and timing function. If none is found, a new Keyframe object

// with the specified |offset| and |timingFunction| will be prepended to

// |keyframes|.

//

// @param keyframes  An array of Keyframe objects, sorted by offset.

//                   The first Keyframe in the array, if any, MUST have an

//                   offset greater than or equal to |offset|.

// @param offset  The offset to search for, or, if no suitable Keyframe is

//                found, the offset to use for the created Keyframe.

//                Must be a floating point number in the range [0.0, 1.0].

// @param timingFunction  The timing function to match, or, if no suitable

//                        Keyframe is found, to set on the created Keyframe.

// @param composition  The composition to match, or, if no suitable Keyframe is

//                     found, to set on the created Keyframe.

//

// @returns  The matching or created Keyframe.

mozilla::Keyframe* Gecko_GetOrCreateKeyframeAtStart(

    nsTArray<mozilla::Keyframe>* keyframes, float offset,

    const mozilla::StyleComputedTimingFunction* timingFunction,

    const mozilla::dom::CompositeOperationOrAuto composition);

// As with Gecko_GetOrCreateKeyframeAtStart except that this method will search

// from the beginning of |keyframes| for a Keyframe with matching timing

// function, composition, and an offset of 0.0.

// Furthermore, if a matching Keyframe is not found, a new Keyframe will be

// inserted after the *last* Keyframe in |keyframes| with offset 0.0.

mozilla::Keyframe* Gecko_GetOrCreateInitialKeyframe(

    nsTArray<mozilla::Keyframe>* keyframes,

    const mozilla::StyleComputedTimingFunction* timingFunction,

    const mozilla::dom::CompositeOperationOrAuto composition);

// As with Gecko_GetOrCreateKeyframeAtStart except that this method will search

// from the *end* of |keyframes| for a Keyframe with matching timing function,

// composition, and an offset of 1.0. If a matching Keyframe is not found, a new

// Keyframe will be appended to the end of |keyframes|.

mozilla::Keyframe* Gecko_GetOrCreateFinalKeyframe(

    nsTArray<mozilla::Keyframe>* keyframes,

    const mozilla::StyleComputedTimingFunction* timingFunction,

    const mozilla::dom::CompositeOperationOrAuto composition);

void Gecko_ResetFilters(nsStyleEffects* effects, size_t new_len);

void Gecko_CopyFiltersFrom(nsStyleEffects* aSrc, nsStyleEffects* aDest);

void Gecko_nsStyleSVG_SetDashArrayLength(nsStyleSVG* svg, uint32_t len);

void Gecko_nsStyleSVG_CopyDashArray(nsStyleSVG* dst, const nsStyleSVG* src);

void Gecko_nsStyleSVG_SetContextPropertiesLength(nsStyleSVG* svg, uint32_t len);

void Gecko_nsStyleSVG_CopyContextProperties(nsStyleSVG* dst,

                                            const nsStyleSVG* src);

void Gecko_GetComputedURLSpec(const mozilla::StyleComputedUrl* url,

                              nsCString* spec);

void Gecko_GetComputedImageURLSpec(const mozilla::StyleComputedUrl* url,

                                   nsCString* spec);

// Return true if the given image MIME type is supported

bool Gecko_IsSupportedImageMimeType(const uint8_t* mime_type,

                                    const uint32_t len);

void Gecko_nsIURI_Debug(nsIURI*, nsCString* spec);

void Gecko_nsIReferrerInfo_Debug(nsIReferrerInfo* aReferrerInfo,

                                 nsCString* aOut);

NS_DECL_THREADSAFE_FFI_REFCOUNTING(mozilla::URLExtraData, URLExtraData);

NS_DECL_THREADSAFE_FFI_REFCOUNTING(nsIReferrerInfo, nsIReferrerInfo);

void Gecko_FillAllImageLayers(nsStyleImageLayers* layers, uint32_t max_len);

void Gecko_LoadData_Drop(mozilla::StyleLoadData*);

void Gecko_nsStyleFont_SetLang(nsStyleFont* font, nsAtom* atom);

void Gecko_nsStyleFont_CopyLangFrom(nsStyleFont* aFont,

                                    const nsStyleFont* aSource);

mozilla::Length Gecko_nsStyleFont_ComputeMinSize(const nsStyleFont*,

                                                 const mozilla::dom::Document*);

// Computes the default generic font for a language.

mozilla::StyleGenericFontFamily

Gecko_nsStyleFont_ComputeFallbackFontTypeForLanguage(

    const mozilla::dom::Document*, nsAtom* language);

mozilla::Length Gecko_GetBaseSize(const mozilla::dom::Document*,

                                  nsAtom* language,

                                  mozilla::StyleGenericFontFamily);

};

GeckoFontMetrics Gecko_GetFontMetrics(const nsPresContext*, bool is_vertical,

                                      const nsStyleFont* font,

                                      mozilla::Length font_size,

                                      bool use_user_font_set,

                                      bool retrieve_math_scales);

mozilla::StyleSheet* Gecko_StyleSheet_Clone(const mozilla::StyleSheet* aSheet);

void Gecko_StyleSheet_AddRef(const mozilla::StyleSheet* aSheet);

void Gecko_StyleSheet_Release(const mozilla::StyleSheet* aSheet);

};

GeckoImplicitScopeRoot Gecko_StyleSheet_ImplicitScopeRoot(

    const mozilla::StyleSheet* aSheet);

bool Gecko_IsDocumentBody(const mozilla::dom::Element* element);

bool Gecko_IsDarkColorScheme(const mozilla::dom::Document*,

                             const mozilla::StyleColorSchemeFlags*);

nscolor Gecko_ComputeSystemColor(mozilla::StyleSystemColor,

                                 const mozilla::dom::Document*,

                                 const mozilla::StyleColorSchemeFlags*);

// We use an int32_t here instead of a LookAndFeel::IntID/FloatID because

// forward-declaring a nested enum/struct is impossible.

int32_t Gecko_GetLookAndFeelInt(int32_t int_id);

float Gecko_GetLookAndFeelFloat(int32_t float_id);

void Gecko_AddPropertyToSet(nsCSSPropertyIDSet*, nsCSSPropertyID);

// Style-struct management.

#define STYLE_STRUCT(name)                                                   \

  void Gecko_Construct_Default_nsStyle##name(nsStyle##name* ptr,             \

                                             const mozilla::dom::Document*); \

  void Gecko_CopyConstruct_nsStyle##name(nsStyle##name* ptr,                 \

                                         const nsStyle##name* other);        \

  void Gecko_Destroy_nsStyle##name(nsStyle##name* ptr);

#include "nsStyleStructList.h"

#undef STYLE_STRUCT

bool Gecko_DocumentRule_UseForPresentation(

    const mozilla::dom::Document*, const nsACString* aPattern,

    mozilla::css::DocumentMatchingFunction);

// Allocator hinting.

void Gecko_SetJemallocThreadLocalArena(bool enabled);

// Pseudo-element flags.

#define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \

  const uint32_t SERVO_CSS_PSEUDO_ELEMENT_FLAGS_##name_ = flags_;

#include "nsCSSPseudoElementList.h"

#undef CSS_PSEUDO_ELEMENT

bool Gecko_ErrorReportingEnabled(const mozilla::StyleSheet* sheet,

                                 const mozilla::css::Loader* loader,

                                 uint64_t* aOutWindowId);

void Gecko_ReportUnexpectedCSSError(

    uint64_t windowId, nsIURI* uri, const char* message, const char* param,

    uint32_t paramLen, const char* prefix, const char* prefixParam,

    uint32_t prefixParamLen, const char* suffix, const char* selectors,

    uint32_t selectorsLen, uint32_t lineNumber, uint32_t colNumber);

// DOM APIs.

void Gecko_ContentList_AppendAll(nsSimpleContentList* aContentList,

                                 const mozilla::dom::Element** aElements,

                                 size_t aLength);

// FIXME(emilio): These two below should be a single function that takes a

// `const DocumentOrShadowRoot*`, but that doesn't make MSVC builds happy for a

// reason I haven't really dug into.

const nsTArray<mozilla::dom::Element*>* Gecko_Document_GetElementsWithId(

    const mozilla::dom::Document*, nsAtom* aId);

const nsTArray<mozilla::dom::Element*>* Gecko_ShadowRoot_GetElementsWithId(

    const mozilla::dom::ShadowRoot*, nsAtom* aId);

bool Gecko_ComputeBoolPrefMediaQuery(nsAtom*);

// Check whether font format/tech is supported.

bool Gecko_IsFontFormatSupported(

    mozilla::StyleFontFaceSourceFormatKeyword aFormat);

bool Gecko_IsFontTechSupported(mozilla::StyleFontFaceSourceTechFlags aFlag);

bool Gecko_IsKnownIconFontFamily(const nsAtom* aFamilyName);

// Returns true if we're currently performing the servo traversal.

bool Gecko_IsInServoTraversal();

// Returns true if we're currently on the main thread.

bool Gecko_IsMainThread();

// Returns true if we're currently on a DOM worker thread.

bool Gecko_IsDOMWorkerThread();

// Returns the preferred number of style threads to use, or -1 for no

// preference.

int32_t Gecko_GetNumStyleThreads();

// Media feature helpers.

//

// Defined in nsMediaFeatures.cpp.

mozilla::StyleDisplayMode Gecko_MediaFeatures_GetDisplayMode(

    const mozilla::dom::Document*);

bool Gecko_MediaFeatures_UseOverlayScrollbars(const mozilla::dom::Document*);

int32_t Gecko_MediaFeatures_GetColorDepth(const mozilla::dom::Document*);

int32_t Gecko_MediaFeatures_GetMonochromeBitsPerPixel(

    const mozilla::dom::Document*);

mozilla::StyleColorGamut Gecko_MediaFeatures_ColorGamut(

    const mozilla::dom::Document*);

void Gecko_MediaFeatures_GetDeviceSize(const mozilla::dom::Document*,

                                       nscoord* width, nscoord* height);

float Gecko_MediaFeatures_GetResolution(const mozilla::dom::Document*);

bool Gecko_MediaFeatures_PrefersReducedMotion(const mozilla::dom::Document*);

bool Gecko_MediaFeatures_PrefersReducedTransparency(

    const mozilla::dom::Document*);

mozilla::StylePrefersContrast Gecko_MediaFeatures_PrefersContrast(

    const mozilla::dom::Document*);

mozilla::StylePrefersColorScheme Gecko_MediaFeatures_PrefersColorScheme(

    const mozilla::dom::Document*, bool aUseContent);

bool Gecko_MediaFeatures_InvertedColors(const mozilla::dom::Document*);

mozilla::StyleScripting Gecko_MediaFeatures_Scripting(

    const mozilla::dom::Document*);

mozilla::StyleDynamicRange Gecko_MediaFeatures_DynamicRange(

    const mozilla::dom::Document*);

mozilla::StyleDynamicRange Gecko_MediaFeatures_VideoDynamicRange(

    const mozilla::dom::Document*);

mozilla::PointerCapabilities Gecko_MediaFeatures_PrimaryPointerCapabilities(

    const mozilla::dom::Document*);

mozilla::PointerCapabilities Gecko_MediaFeatures_AllPointerCapabilities(

    const mozilla::dom::Document*);

float Gecko_MediaFeatures_GetDevicePixelRatio(const mozilla::dom::Document*);

bool Gecko_MediaFeatures_IsResourceDocument(const mozilla::dom::Document*);

bool Gecko_MediaFeatures_MatchesPlatform(mozilla::StylePlatform);

mozilla::StyleGtkThemeFamily Gecko_MediaFeatures_GtkThemeFamily();

void Gecko_GetSafeAreaInsets(const nsPresContext*, float*, float*, float*,

                             float*);

void Gecko_PrintfStderr(const nsCString*);

}  // extern "C"

#endif  // mozilla_GeckoBindings_h

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