Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 660 insertions, 0 deletions

diff --git a/layout/style/GeckoBindings.h b/layout/style/GeckoBindings.h
new file mode 100644
index 0000000000..7bb839ae18
--- /dev/null
+++ b/layout/style/GeckoBindings.h
@@ -0,0 +1,660 @@
+/* -*- 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 {
+class ComputedStyle;
+class SeenPtrs;
+class ServoElementSnapshot;
+class ServoElementSnapshotTable;
+class StyleSheet;
+enum class PseudoStyleType : uint8_t;
+enum class PointerCapabilities : uint8_t;
+enum class UpdateAnimationsTasks : uint8_t;
+struct Keyframe;
+struct StyleStylesheetContents;
+
+namespace css {
+class LoaderReusableStyleSheets;
+}
+namespace dom {
+enum class CompositeOperationOrAuto : uint8_t;
+enum class ScreenColorGamut : uint8_t;
+}  // namespace dom
+}  // 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);
+
+// Counter style.
+void Gecko_CounterStyle_ToPtr(const mozilla::StyleCounterStyle*,
+                              mozilla::CounterStylePtr*);
+
+void Gecko_SetCounterStyleToNone(mozilla::CounterStylePtr*);
+
+void Gecko_SetCounterStyleToString(mozilla::CounterStylePtr* ptr,
+                                   const nsACString* symbol);
+
+void Gecko_CopyCounterStyle(mozilla::CounterStylePtr* dst,
+                            const mozilla::CounterStylePtr* src);
+
+nsAtom* Gecko_CounterStyle_GetName(const mozilla::CounterStylePtr* ptr);
+
+const mozilla::AnonymousCounterStyle* Gecko_CounterStyle_GetAnonymous(
+    const mozilla::CounterStylePtr* ptr);
+
+// 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*);
+
+// Incremental restyle.
+mozilla::PseudoStyleType Gecko_GetImplementedPseudo(
+    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);
+
+// `array` must be an nsTArray
+// If changing this signature, please update the
+// friend function declaration in nsTArray.h
+void Gecko_EnsureTArrayCapacity(void* array, size_t capacity, size_t elem_size);
+
+// Same here, `array` must be an nsTArray<T>, for some T.
+//
+// Important note: Only valid for POD types, since destructors won't be run
+// otherwise. This is ensured with rust traits for the relevant structs.
+void Gecko_ClearPODTArray(void* array, size_t elem_size, size_t elem_align);
+
+void Gecko_ResizeTArrayForStrings(nsTArray<nsString>* array, uint32_t length);
+void Gecko_ResizeAtomArray(nsTArray<RefPtr<nsAtom>>* array, uint32_t length);
+
+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);
+
+// Appends and returns a new PropertyValuePair to |aProperties| initialized with
+// its mProperty member set to |aProperty| and all other members initialized to
+// their default values.
+mozilla::PropertyValuePair* Gecko_AppendPropertyValuePair(
+    nsTArray<mozilla::PropertyValuePair>*,
+    const mozilla::AnimatedPropertyID* aProperty);
+
+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);
+
+struct GeckoFontMetrics {
+  mozilla::Length mXSize;
+  mozilla::Length mChSize;     // negatives indicate not found.
+  mozilla::Length mCapHeight;  // negatives indicate not found.
+  mozilla::Length mIcWidth;    // negatives indicate not found.
+  mozilla::Length mAscent;
+  mozilla::Length mComputedEmSize;
+  float mScriptPercentScaleDown;        // zero is invalid or means not found.
+  float mScriptScriptPercentScaleDown;  // zero is invalid or means not found.
+};
+
+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,
+    const mozilla::StyleSheet* aNewParentSheet);
+
+void Gecko_StyleSheet_AddRef(const mozilla::StyleSheet* aSheet);
+void Gecko_StyleSheet_Release(const mozilla::StyleSheet* aSheet);
+bool Gecko_IsDocumentBody(const mozilla::dom::Element* element);
+
+bool Gecko_IsDarkColorScheme(const mozilla::dom::Document*,
+                             const mozilla::StyleColorScheme*);
+nscolor Gecko_ComputeSystemColor(mozilla::StyleSystemColor,
+                                 const mozilla::dom::Document*,
+                                 const mozilla::StyleColorScheme*);
+
+// 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* source,
+    uint32_t sourceLen, 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::dom::ScreenColorGamut 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