layout/style/GeckoBindings.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 /* FFI functions for Servo to call into Gecko */
   8
   9 #ifndef mozilla_GeckoBindings_h
  10 #define mozilla_GeckoBindings_h
  11
  12 #include <stdint.h>
  13
  14 #include "mozilla/ServoTypes.h"
  15 #include "mozilla/ServoBindingTypes.h"
  16 #include "mozilla/css/DocumentMatchingFunction.h"
  17 #include "mozilla/css/SheetLoadData.h"
  18 #include "mozilla/dom/Document.h"
  19 #include "mozilla/EffectCompositor.h"
  20 #include "mozilla/PreferenceSheet.h"
  21 #include "nsStyleStruct.h"
  22 #include "COLRFonts.h"
  23
  24 class nsAtom;
  25 class nsIURI;
  26 class nsSimpleContentList;
  27 struct nsFont;
  28 class ServoComputedData;
  29
  30 namespace mozilla {
  31 class ComputedStyle;
  32 class SeenPtrs;
  33 class ServoElementSnapshot;
  34 class ServoElementSnapshotTable;
  35 class StyleSheet;
  36 enum class PseudoStyleType : uint8_t;
  37 enum class PointerCapabilities : uint8_t;
  38 enum class UpdateAnimationsTasks : uint8_t;
  39 struct Keyframe;
  40
  41 namespace css {
  42 class LoaderReusableStyleSheets;
  43 }
  44 namespace dom {
  45 enum class CompositeOperationOrAuto : uint8_t;
  46 enum class ScreenColorGamut : uint8_t;
  47 }  // namespace dom
  48 }  // namespace mozilla
  49
  50 #ifdef NIGHTLY_BUILD
  51 const bool GECKO_IS_NIGHTLY = true;
  52 #else
  53 const bool GECKO_IS_NIGHTLY = false;
  54 #endif
  55
  56 #define NS_DECL_THREADSAFE_FFI_REFCOUNTING(class_, name_)  \
  57   void Gecko_AddRef##name_##ArbitraryThread(class_* aPtr); \
  58   void Gecko_Release##name_##ArbitraryThread(class_* aPtr);
  59 #define NS_IMPL_THREADSAFE_FFI_REFCOUNTING(class_, name_)                      \
  60   static_assert(class_::HasThreadSafeRefCnt::value,                            \
  61                 "NS_DECL_THREADSAFE_FFI_REFCOUNTING can only be used with "    \
  62                 "classes that have thread-safe refcounting");                  \
  63   void Gecko_AddRef##name_##ArbitraryThread(class_* aPtr) { NS_ADDREF(aPtr); } \
  64   void Gecko_Release##name_##ArbitraryThread(class_* aPtr) { NS_RELEASE(aPtr); }
  65
  66 extern "C" {
  67
  68 NS_DECL_THREADSAFE_FFI_REFCOUNTING(nsIURI, nsIURI);
  69
  70 // Debugging stuff.
  71 void Gecko_Element_DebugListAttributes(const mozilla::dom::Element*,
  72                                        nsCString*);
  73
  74 void Gecko_Snapshot_DebugListAttributes(const mozilla::ServoElementSnapshot*,
  75                                         nsCString*);
  76
  77 bool Gecko_IsSignificantChild(const nsINode*, bool whitespace_is_significant);
  78
  79 const nsINode* Gecko_GetLastChild(const nsINode*);
  80 const nsINode* Gecko_GetFlattenedTreeParentNode(const nsINode*);
  81 const mozilla::dom::Element* Gecko_GetBeforeOrAfterPseudo(
  82     const mozilla::dom::Element*, bool is_before);
  83 const mozilla::dom::Element* Gecko_GetMarkerPseudo(
  84     const mozilla::dom::Element*);
  85
  86 nsTArray<nsIContent*>* Gecko_GetAnonymousContentForElement(
  87     const mozilla::dom::Element*);
  88 void Gecko_DestroyAnonymousContentList(nsTArray<nsIContent*>* anon_content);
  89
  90 const nsTArray<RefPtr<nsINode>>* Gecko_GetAssignedNodes(
  91     const mozilla::dom::Element*);
  92
  93 void Gecko_GetQueryContainerSize(const mozilla::dom::Element*,
  94                                  nscoord* aOutWidth, nscoord* aOutHeight);
  95
  96 void Gecko_ComputedStyle_Init(mozilla::ComputedStyle* context,
  97                               const ServoComputedData* values,
  98                               mozilla::PseudoStyleType pseudo_type);
  99
 100 void Gecko_ComputedStyle_Destroy(mozilla::ComputedStyle* context);
 101
 102 // By default, Servo walks the DOM by traversing the siblings of the DOM-view
 103 // first child. This generally works, but misses anonymous children, which we
 104 // want to traverse during styling. To support these cases, we create an
 105 // optional stack-allocated iterator in aIterator for nodes that need it.
 106 void Gecko_ConstructStyleChildrenIterator(const mozilla::dom::Element*,
 107                                           mozilla::dom::StyleChildrenIterator*);
 108
 109 void Gecko_DestroyStyleChildrenIterator(mozilla::dom::StyleChildrenIterator*);
 110
 111 const nsINode* Gecko_GetNextStyleChild(mozilla::dom::StyleChildrenIterator*);
 112
 113 nsAtom* Gecko_Element_ImportedPart(const nsAttrValue*, nsAtom*);
 114 nsAtom** Gecko_Element_ExportedParts(const nsAttrValue*, nsAtom*,
 115                                      size_t* aOutLength);
 116
 117 NS_DECL_THREADSAFE_FFI_REFCOUNTING(mozilla::css::SheetLoadDataHolder,
 118                                    SheetLoadDataHolder);
 119
 120 void Gecko_StyleSheet_FinishAsyncParse(
 121     mozilla::css::SheetLoadDataHolder* data,
 122     mozilla::StyleStrong<RawServoStyleSheetContents> sheet_contents,
 123     mozilla::StyleOwnedOrNull<StyleUseCounters> use_counters);
 124
 125 mozilla::StyleSheet* Gecko_LoadStyleSheet(
 126     mozilla::css::Loader* loader, mozilla::StyleSheet* parent,
 127     mozilla::css::SheetLoadData* parent_load_data,
 128     mozilla::css::LoaderReusableStyleSheets* reusable_sheets,
 129     const mozilla::StyleCssUrl* url,
 130     mozilla::StyleStrong<RawServoMediaList> media_list);
 131
 132 void Gecko_LoadStyleSheetAsync(mozilla::css::SheetLoadDataHolder* parent_data,
 133                                const mozilla::StyleCssUrl* url,
 134                                mozilla::StyleStrong<RawServoMediaList>,
 135                                mozilla::StyleStrong<RawServoImportRule>);
 136
 137 // Selector Matching.
 138 uint64_t Gecko_ElementState(const mozilla::dom::Element*);
 139 bool Gecko_IsRootElement(const mozilla::dom::Element*);
 140
 141 bool Gecko_MatchLang(const mozilla::dom::Element*, nsAtom* override_lang,
 142                      bool has_override_lang, const char16_t* value);
 143
 144 nsAtom* Gecko_GetXMLLangValue(const mozilla::dom::Element*);
 145
 146 const mozilla::PreferenceSheet::Prefs* Gecko_GetPrefSheetPrefs(
 147     const mozilla::dom::Document*);
 148
 149 bool Gecko_IsTableBorderNonzero(const mozilla::dom::Element* element);
 150 bool Gecko_IsBrowserFrame(const mozilla::dom::Element* element);
 151 bool Gecko_IsSelectListBox(const mozilla::dom::Element* element);
 152
 153 // Attributes.
 154 #define SERVO_DECLARE_ELEMENT_ATTR_MATCHING_FUNCTIONS(prefix_, implementor_)   \
 155   nsAtom* prefix_##LangValue(implementor_ element);                            \
 156   bool prefix_##HasAttr(implementor_ element, nsAtom* ns, nsAtom* name);       \
 157   bool prefix_##AttrEquals(implementor_ element, nsAtom* ns, nsAtom* name,     \
 158                            nsAtom* str, bool ignoreCase);                      \
 159   bool prefix_##AttrDashEquals(implementor_ element, nsAtom* ns, nsAtom* name, \
 160                                nsAtom* str, bool ignore_case);                 \
 161   bool prefix_##AttrIncludes(implementor_ element, nsAtom* ns, nsAtom* name,   \
 162                              nsAtom* str, bool ignore_case);                   \
 163   bool prefix_##AttrHasSubstring(implementor_ element, nsAtom* ns,             \
 164                                  nsAtom* name, nsAtom* str, bool ignore_case); \
 165   bool prefix_##AttrHasPrefix(implementor_ element, nsAtom* ns, nsAtom* name,  \
 166                               nsAtom* str, bool ignore_case);                  \
 167   bool prefix_##AttrHasSuffix(implementor_ element, nsAtom* ns, nsAtom* name,  \
 168                               nsAtom* str, bool ignore_case);
 169
 170 bool Gecko_AssertClassAttrValueIsSane(const nsAttrValue*);
 171 const nsAttrValue* Gecko_GetSVGAnimatedClass(const mozilla::dom::Element*);
 172
 173 SERVO_DECLARE_ELEMENT_ATTR_MATCHING_FUNCTIONS(Gecko_,
 174                                               const mozilla::dom::Element*)
 175
 176 SERVO_DECLARE_ELEMENT_ATTR_MATCHING_FUNCTIONS(
 177     Gecko_Snapshot, const mozilla::ServoElementSnapshot*)
 178
 179 #undef SERVO_DECLARE_ELEMENT_ATTR_MATCHING_FUNCTIONS
 180
 181 // Style attributes.
 182 const mozilla::StyleStrong<RawServoDeclarationBlock>*
 183 Gecko_GetStyleAttrDeclarationBlock(const mozilla::dom::Element* element);
 184
 185 void Gecko_UnsetDirtyStyleAttr(const mozilla::dom::Element* element);
 186
 187 const mozilla::StyleStrong<RawServoDeclarationBlock>*
 188 Gecko_GetHTMLPresentationAttrDeclarationBlock(
 189     const mozilla::dom::Element* element);
 190
 191 const mozilla::StyleStrong<RawServoDeclarationBlock>*
 192 Gecko_GetExtraContentStyleDeclarations(const mozilla::dom::Element* element);
 193
 194 const mozilla::StyleStrong<RawServoDeclarationBlock>*
 195 Gecko_GetUnvisitedLinkAttrDeclarationBlock(
 196     const mozilla::dom::Element* element);
 197
 198 const mozilla::StyleStrong<RawServoDeclarationBlock>*
 199 Gecko_GetVisitedLinkAttrDeclarationBlock(const mozilla::dom::Element* element);
 200
 201 const mozilla::StyleStrong<RawServoDeclarationBlock>*
 202 Gecko_GetActiveLinkAttrDeclarationBlock(const mozilla::dom::Element* element);
 203
 204 // Visited handling.
 205
 206 // Returns whether visited styles are enabled for a given document.
 207 bool Gecko_VisitedStylesEnabled(const mozilla::dom::Document*);
 208
 209 // Animations
 210 bool Gecko_GetAnimationRule(
 211     const mozilla::dom::Element* aElementOrPseudo,
 212     mozilla::EffectCompositor::CascadeLevel aCascadeLevel,
 213     RawServoAnimationValueMap* aAnimationValues);
 214
 215 bool Gecko_StyleAnimationsEquals(
 216     const nsStyleAutoArray<mozilla::StyleAnimation>*,
 217     const nsStyleAutoArray<mozilla::StyleAnimation>*);
 218
 219 bool Gecko_StyleScrollTimelinesEquals(
 220     const nsStyleAutoArray<mozilla::StyleScrollTimeline>*,
 221     const nsStyleAutoArray<mozilla::StyleScrollTimeline>*);
 222
 223 bool Gecko_StyleViewTimelinesEquals(
 224     const nsStyleAutoArray<mozilla::StyleViewTimeline>*,
 225     const nsStyleAutoArray<mozilla::StyleViewTimeline>*);
 226
 227 void Gecko_CopyAnimationNames(
 228     nsStyleAutoArray<mozilla::StyleAnimation>* aDest,
 229     const nsStyleAutoArray<mozilla::StyleAnimation>* aSrc);
 230
 231 // This function takes an already addrefed nsAtom
 232 void Gecko_SetAnimationName(mozilla::StyleAnimation* aStyleAnimation,
 233                             nsAtom* aAtom);
 234
 235 void Gecko_UpdateAnimations(const mozilla::dom::Element* aElementOrPseudo,
 236                             const mozilla::ComputedStyle* aOldComputedValues,
 237                             const mozilla::ComputedStyle* aComputedValues,
 238                             mozilla::UpdateAnimationsTasks aTasks);
 239
 240 size_t Gecko_GetAnimationEffectCount(
 241     const mozilla::dom::Element* aElementOrPseudo);
 242 bool Gecko_ElementHasAnimations(const mozilla::dom::Element* aElementOrPseudo);
 243 bool Gecko_ElementHasCSSAnimations(
 244     const mozilla::dom::Element* aElementOrPseudo);
 245 bool Gecko_ElementHasCSSTransitions(
 246     const mozilla::dom::Element* aElementOrPseudo);
 247 bool Gecko_ElementHasWebAnimations(
 248     const mozilla::dom::Element* aElementOrPseudo);
 249 size_t Gecko_ElementTransitions_Length(
 250     const mozilla::dom::Element* aElementOrPseudo);
 251
 252 nsCSSPropertyID Gecko_ElementTransitions_PropertyAt(
 253     const mozilla::dom::Element* aElementOrPseudo, size_t aIndex);
 254
 255 const RawServoAnimationValue* Gecko_ElementTransitions_EndValueAt(
 256     const mozilla::dom::Element* aElementOrPseudo, size_t aIndex);
 257
 258 double Gecko_GetProgressFromComputedTiming(const mozilla::ComputedTiming*);
 259
 260 double Gecko_GetPositionInSegment(const mozilla::AnimationPropertySegment*,
 261                                   double aProgress, bool aBeforeFlag);
 262
 263 // Get servo's AnimationValue for |aProperty| from the cached base style
 264 // |aBaseStyles|.
 265 // |aBaseStyles| is nsRefPtrHashtable<nsUint32HashKey, RawServoAnimationValue>.
 266 // We use RawServoAnimationValueTableBorrowed to avoid exposing
 267 // nsRefPtrHashtable in FFI.
 268 const RawServoAnimationValue* Gecko_AnimationGetBaseStyle(
 269     const RawServoAnimationValueTable* aBaseStyles, nsCSSPropertyID aProperty);
 270
 271 void Gecko_StyleTransition_SetUnsupportedProperty(
 272     mozilla::StyleTransition* aTransition, nsAtom* aAtom);
 273
 274 // Atoms.
 275 nsAtom* Gecko_Atomize(const char* aString, uint32_t aLength);
 276 nsAtom* Gecko_Atomize16(const nsAString* aString);
 277 void Gecko_AddRefAtom(nsAtom* aAtom);
 278 void Gecko_ReleaseAtom(nsAtom* aAtom);
 279
 280 // will not run destructors on dst, give it uninitialized memory
 281 // font_id is LookAndFeel::FontID
 282 void Gecko_nsFont_InitSystem(nsFont* dst, mozilla::StyleSystemFont font_id,
 283                              const nsStyleFont* font,
 284                              const mozilla::dom::Document*);
 285
 286 void Gecko_nsFont_Destroy(nsFont* dst);
 287
 288 // The gfxFontFeatureValueSet returned from this function has zero reference.
 289 gfxFontFeatureValueSet* Gecko_ConstructFontFeatureValueSet();
 290
 291 nsTArray<uint32_t>* Gecko_AppendFeatureValueHashEntry(
 292     gfxFontFeatureValueSet* value_set, nsAtom* family, uint32_t alternate,
 293     nsAtom* name);
 294
 295 // Font variant alternates
 296 void Gecko_ClearAlternateValues(nsFont* font, size_t length);
 297
 298 void Gecko_AppendAlternateValues(nsFont* font, uint32_t alternate_name,
 299                                  nsAtom* atom);
 300
 301 void Gecko_CopyAlternateValuesFrom(nsFont* dest, const nsFont* src);
 302
 303 // The FontPaletteValueSet returned from this function has zero reference.
 304 mozilla::gfx::FontPaletteValueSet* Gecko_ConstructFontPaletteValueSet();
 305
 306 mozilla::gfx::FontPaletteValueSet::PaletteValues*
 307 Gecko_AppendPaletteValueHashEntry(
 308     mozilla::gfx::FontPaletteValueSet* aPaletteValueSet, nsAtom* aFamily,
 309     nsAtom* aName);
 310
 311 void Gecko_SetFontPaletteBase(
 312     mozilla::gfx::FontPaletteValueSet::PaletteValues* aValues,
 313     int32_t aBasePaletteIndex);
 314
 315 void Gecko_SetFontPaletteOverride(
 316     mozilla::gfx::FontPaletteValueSet::PaletteValues* aValues, int32_t aIndex,
 317     mozilla::StyleAbsoluteColor* aColor);
 318
 319 // Visibility style
 320 void Gecko_SetImageOrientation(nsStyleVisibility* aVisibility,
 321                                uint8_t aOrientation, bool aFlip);
 322
 323 void Gecko_SetImageOrientationAsFromImage(nsStyleVisibility* aVisibility);
 324
 325 void Gecko_CopyImageOrientationFrom(nsStyleVisibility* aDst,
 326                                     const nsStyleVisibility* aSrc);
 327
 328 // Counter style.
 329 void Gecko_CounterStyle_ToPtr(const mozilla::StyleCounterStyle*,
 330                               mozilla::CounterStylePtr*);
 331
 332 void Gecko_SetCounterStyleToNone(mozilla::CounterStylePtr*);
 333
 334 void Gecko_SetCounterStyleToString(mozilla::CounterStylePtr* ptr,
 335                                    const nsACString* symbol);
 336
 337 void Gecko_CopyCounterStyle(mozilla::CounterStylePtr* dst,
 338                             const mozilla::CounterStylePtr* src);
 339
 340 nsAtom* Gecko_CounterStyle_GetName(const mozilla::CounterStylePtr* ptr);
 341
 342 const mozilla::AnonymousCounterStyle* Gecko_CounterStyle_GetAnonymous(
 343     const mozilla::CounterStylePtr* ptr);
 344
 345 // list-style-image style.
 346 void Gecko_SetListStyleImageNone(nsStyleList* style_struct);
 347
 348 void Gecko_SetListStyleImageImageValue(
 349     nsStyleList* style_struct, const mozilla::StyleComputedImageUrl* url);
 350
 351 void Gecko_CopyListStyleImageFrom(nsStyleList* dest, const nsStyleList* src);
 352
 353 // Dirtiness tracking.
 354 void Gecko_NoteDirtyElement(const mozilla::dom::Element*);
 355 void Gecko_NoteDirtySubtreeForInvalidation(const mozilla::dom::Element*);
 356 void Gecko_NoteAnimationOnlyDirtyElement(const mozilla::dom::Element*);
 357
 358 bool Gecko_AnimationNameMayBeReferencedFromStyle(const nsPresContext*,
 359                                                  nsAtom* name);
 360
 361 float Gecko_GetScrollbarInlineSize(const nsPresContext*);
 362
 363 // Incremental restyle.
 364 mozilla::PseudoStyleType Gecko_GetImplementedPseudo(
 365     const mozilla::dom::Element*);
 366
 367 // We'd like to return `nsChangeHint` here, but bindgen bitfield enums don't
 368 // work as return values with the Linux 32-bit ABI at the moment because
 369 // they wrap the value in a struct.
 370 uint32_t Gecko_CalcStyleDifference(const mozilla::ComputedStyle* old_style,
 371                                    const mozilla::ComputedStyle* new_style,
 372                                    bool* any_style_struct_changed,
 373                                    bool* reset_only_changed);
 374
 375 nscoord Gecko_CalcLineHeight(const mozilla::StyleLineHeight*,
 376                              const nsPresContext*, bool aVertical,
 377                              const nsStyleFont* aAgainstFont,
 378                              const mozilla::dom::Element* aElement);
 379
 380 // Get an element snapshot for a given element from the table.
 381 const mozilla::ServoElementSnapshot* Gecko_GetElementSnapshot(
 382     const mozilla::ServoElementSnapshotTable* table,
 383     const mozilla::dom::Element*);
 384
 385 // Have we seen this pointer before?
 386 bool Gecko_HaveSeenPtr(mozilla::SeenPtrs* table, const void* ptr);
 387
 388 // `array` must be an nsTArray
 389 // If changing this signature, please update the
 390 // friend function declaration in nsTArray.h
 391 void Gecko_EnsureTArrayCapacity(void* array, size_t capacity, size_t elem_size);
 392
 393 // Same here, `array` must be an nsTArray<T>, for some T.
 394 //
 395 // Important note: Only valid for POD types, since destructors won't be run
 396 // otherwise. This is ensured with rust traits for the relevant structs.
 397 void Gecko_ClearPODTArray(void* array, size_t elem_size, size_t elem_align);
 398
 399 void Gecko_ResizeTArrayForStrings(nsTArray<nsString>* array, uint32_t length);
 400 void Gecko_ResizeAtomArray(nsTArray<RefPtr<nsAtom>>* array, uint32_t length);
 401
 402 void Gecko_EnsureImageLayersLength(nsStyleImageLayers* layers, size_t len,
 403                                    nsStyleImageLayers::LayerType layer_type);
 404
 405 void Gecko_EnsureStyleAnimationArrayLength(void* array, size_t len);
 406 void Gecko_EnsureStyleTransitionArrayLength(void* array, size_t len);
 407 void Gecko_EnsureStyleScrollTimelineArrayLength(void* array, size_t len);
 408 void Gecko_EnsureStyleViewTimelineArrayLength(void* array, size_t len);
 409
 410 // Searches from the beginning of |keyframes| for a Keyframe object with the
 411 // specified offset and timing function. If none is found, a new Keyframe object
 412 // with the specified |offset| and |timingFunction| will be prepended to
 413 // |keyframes|.
 414 //
 415 // @param keyframes  An array of Keyframe objects, sorted by offset.
 416 //                   The first Keyframe in the array, if any, MUST have an
 417 //                   offset greater than or equal to |offset|.
 418 // @param offset  The offset to search for, or, if no suitable Keyframe is
 419 //                found, the offset to use for the created Keyframe.
 420 //                Must be a floating point number in the range [0.0, 1.0].
 421 // @param timingFunction  The timing function to match, or, if no suitable
 422 //                        Keyframe is found, to set on the created Keyframe.
 423 // @param composition  The composition to match, or, if no suitable Keyframe is
 424 //                     found, to set on the created Keyframe.
 425 //
 426 // @returns  The matching or created Keyframe.
 427 mozilla::Keyframe* Gecko_GetOrCreateKeyframeAtStart(
 428     nsTArray<mozilla::Keyframe>* keyframes, float offset,
 429     const mozilla::StyleComputedTimingFunction* timingFunction,
 430     const mozilla::dom::CompositeOperationOrAuto composition);
 431
 432 // As with Gecko_GetOrCreateKeyframeAtStart except that this method will search
 433 // from the beginning of |keyframes| for a Keyframe with matching timing
 434 // function, composition, and an offset of 0.0.
 435 // Furthermore, if a matching Keyframe is not found, a new Keyframe will be
 436 // inserted after the *last* Keyframe in |keyframes| with offset 0.0.
 437 mozilla::Keyframe* Gecko_GetOrCreateInitialKeyframe(
 438     nsTArray<mozilla::Keyframe>* keyframes,
 439     const mozilla::StyleComputedTimingFunction* timingFunction,
 440     const mozilla::dom::CompositeOperationOrAuto composition);
 441
 442 // As with Gecko_GetOrCreateKeyframeAtStart except that this method will search
 443 // from the *end* of |keyframes| for a Keyframe with matching timing function,
 444 // composition, and an offset of 1.0. If a matching Keyframe is not found, a new
 445 // Keyframe will be appended to the end of |keyframes|.
 446 mozilla::Keyframe* Gecko_GetOrCreateFinalKeyframe(
 447     nsTArray<mozilla::Keyframe>* keyframes,
 448     const mozilla::StyleComputedTimingFunction* timingFunction,
 449     const mozilla::dom::CompositeOperationOrAuto composition);
 450
 451 // Appends and returns a new PropertyValuePair to |aProperties| initialized with
 452 // its mProperty member set to |aProperty| and all other members initialized to
 453 // their default values.
 454 mozilla::PropertyValuePair* Gecko_AppendPropertyValuePair(
 455     nsTArray<mozilla::PropertyValuePair>*, nsCSSPropertyID aProperty);
 456
 457 void Gecko_ResetFilters(nsStyleEffects* effects, size_t new_len);
 458
 459 void Gecko_CopyFiltersFrom(nsStyleEffects* aSrc, nsStyleEffects* aDest);
 460
 461 void Gecko_nsStyleSVG_SetDashArrayLength(nsStyleSVG* svg, uint32_t len);
 462
 463 void Gecko_nsStyleSVG_CopyDashArray(nsStyleSVG* dst, const nsStyleSVG* src);
 464
 465 void Gecko_nsStyleSVG_SetContextPropertiesLength(nsStyleSVG* svg, uint32_t len);
 466
 467 void Gecko_nsStyleSVG_CopyContextProperties(nsStyleSVG* dst,
 468                                             const nsStyleSVG* src);
 469
 470 void Gecko_GetComputedURLSpec(const mozilla::StyleComputedUrl* url,
 471                               nsCString* spec);
 472
 473 void Gecko_GetComputedImageURLSpec(const mozilla::StyleComputedUrl* url,
 474                                    nsCString* spec);
 475
 476 // Return true if the given image MIME type is supported
 477 bool Gecko_IsSupportedImageMimeType(const uint8_t* mime_type,
 478                                     const uint32_t len);
 479
 480 void Gecko_nsIURI_Debug(nsIURI*, nsCString* spec);
 481
 482 void Gecko_nsIReferrerInfo_Debug(nsIReferrerInfo* aReferrerInfo,
 483                                  nsCString* aOut);
 484
 485 NS_DECL_THREADSAFE_FFI_REFCOUNTING(mozilla::URLExtraData, URLExtraData);
 486 NS_DECL_THREADSAFE_FFI_REFCOUNTING(nsIReferrerInfo, nsIReferrerInfo);
 487
 488 void Gecko_FillAllImageLayers(nsStyleImageLayers* layers, uint32_t max_len);
 489
 490 void Gecko_LoadData_Drop(mozilla::StyleLoadData*);
 491
 492 void Gecko_nsStyleFont_SetLang(nsStyleFont* font, nsAtom* atom);
 493
 494 void Gecko_nsStyleFont_CopyLangFrom(nsStyleFont* aFont,
 495                                     const nsStyleFont* aSource);
 496
 497 mozilla::Length Gecko_nsStyleFont_ComputeMinSize(const nsStyleFont*,
 498                                                  const mozilla::dom::Document*);
 499
 500 // Computes the default generic font for a language.
 501 mozilla::StyleGenericFontFamily
 502 Gecko_nsStyleFont_ComputeFallbackFontTypeForLanguage(
 503     const mozilla::dom::Document*, nsAtom* language);
 504
 505 mozilla::Length Gecko_GetBaseSize(const mozilla::dom::Document*,
 506                                   nsAtom* language,
 507                                   mozilla::StyleGenericFontFamily);
 508
 509 struct GeckoFontMetrics {
 510   mozilla::Length mXSize;
 511   mozilla::Length mChSize;     // negatives indicate not found.
 512   mozilla::Length mCapHeight;  // negatives indicate not found.
 513   mozilla::Length mIcWidth;    // negatives indicate not found.
 514   mozilla::Length mAscent;
 515   float mScriptPercentScaleDown;        // zero is invalid or means not found.
 516   float mScriptScriptPercentScaleDown;  // zero is invalid or means not found.
 517 };
 518
 519 GeckoFontMetrics Gecko_GetFontMetrics(const nsPresContext*, bool is_vertical,
 520                                       const nsStyleFont* font,
 521                                       mozilla::Length font_size,
 522                                       bool use_user_font_set,
 523                                       bool retrieve_math_scales);
 524
 525 mozilla::StyleSheet* Gecko_StyleSheet_Clone(
 526     const mozilla::StyleSheet* aSheet,
 527     const mozilla::StyleSheet* aNewParentSheet);
 528
 529 void Gecko_StyleSheet_AddRef(const mozilla::StyleSheet* aSheet);
 530 void Gecko_StyleSheet_Release(const mozilla::StyleSheet* aSheet);
 531 bool Gecko_IsDocumentBody(const mozilla::dom::Element* element);
 532
 533 nscolor Gecko_ComputeSystemColor(mozilla::StyleSystemColor,
 534                                  const mozilla::dom::Document*,
 535                                  const mozilla::StyleColorScheme*);
 536
 537 // We use an int32_t here instead of a LookAndFeel::IntID/FloatID because
 538 // forward-declaring a nested enum/struct is impossible.
 539 int32_t Gecko_GetLookAndFeelInt(int32_t int_id);
 540 float Gecko_GetLookAndFeelFloat(int32_t float_id);
 541
 542 void Gecko_AddPropertyToSet(nsCSSPropertyIDSet*, nsCSSPropertyID);
 543
 544 // Style-struct management.
 545 #define STYLE_STRUCT(name)                                                   \
 546   void Gecko_Construct_Default_nsStyle##name(nsStyle##name* ptr,             \
 547                                              const mozilla::dom::Document*); \
 548   void Gecko_CopyConstruct_nsStyle##name(nsStyle##name* ptr,                 \
 549                                          const nsStyle##name* other);        \
 550   void Gecko_Destroy_nsStyle##name(nsStyle##name* ptr);
 551 #include "nsStyleStructList.h"
 552 #undef STYLE_STRUCT
 553
 554 bool Gecko_DocumentRule_UseForPresentation(
 555     const mozilla::dom::Document*, const nsACString* aPattern,
 556     mozilla::css::DocumentMatchingFunction);
 557
 558 // Allocator hinting.
 559 void Gecko_SetJemallocThreadLocalArena(bool enabled);
 560
 561 // Pseudo-element flags.
 562 #define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \
 563   const uint32_t SERVO_CSS_PSEUDO_ELEMENT_FLAGS_##name_ = flags_;
 564 #include "nsCSSPseudoElementList.h"
 565 #undef CSS_PSEUDO_ELEMENT
 566
 567 bool Gecko_ErrorReportingEnabled(const mozilla::StyleSheet* sheet,
 568                                  const mozilla::css::Loader* loader,
 569                                  uint64_t* aOutWindowId);
 570
 571 void Gecko_ReportUnexpectedCSSError(
 572     uint64_t windowId, nsIURI* uri, const char* message, const char* param,
 573     uint32_t paramLen, const char* prefix, const char* prefixParam,
 574     uint32_t prefixParamLen, const char* suffix, const char* source,
 575     uint32_t sourceLen, const char* selectors, uint32_t selectorsLen,
 576     uint32_t lineNumber, uint32_t colNumber);
 577
 578 // DOM APIs.
 579 void Gecko_ContentList_AppendAll(nsSimpleContentList* aContentList,
 580                                  const mozilla::dom::Element** aElements,
 581                                  size_t aLength);
 582
 583 // FIXME(emilio): These two below should be a single function that takes a
 584 // `const DocumentOrShadowRoot*`, but that doesn't make MSVC builds happy for a
 585 // reason I haven't really dug into.
 586 const nsTArray<mozilla::dom::Element*>* Gecko_Document_GetElementsWithId(
 587     const mozilla::dom::Document*, nsAtom* aId);
 588
 589 const nsTArray<mozilla::dom::Element*>* Gecko_ShadowRoot_GetElementsWithId(
 590     const mozilla::dom::ShadowRoot*, nsAtom* aId);
 591
 592 // Check the value of the given bool preference. The pref name needs to
 593 // be null-terminated.
 594 bool Gecko_GetBoolPrefValue(const char* pref_name);
 595
 596 // Check whether font format/tech is supported.
 597 bool Gecko_IsFontFormatSupported(
 598     mozilla::StyleFontFaceSourceFormatKeyword aFormat);
 599 bool Gecko_IsFontTechSupported(mozilla::StyleFontFaceSourceTechFlags aFlag);
 600
 601 bool Gecko_IsKnownIconFontFamily(const nsAtom* aFamilyName);
 602
 603 // Returns true if we're currently performing the servo traversal.
 604 bool Gecko_IsInServoTraversal();
 605
 606 // Returns true if we're currently on the main thread.
 607 bool Gecko_IsMainThread();
 608
 609 // Returns true if we're currently on a DOM worker thread.
 610 bool Gecko_IsDOMWorkerThread();
 611
 612 // Media feature helpers.
 613 //
 614 // Defined in nsMediaFeatures.cpp.
 615 mozilla::StyleDisplayMode Gecko_MediaFeatures_GetDisplayMode(
 616     const mozilla::dom::Document*);
 617
 618 bool Gecko_MediaFeatures_WindowsNonNativeMenus(const mozilla::dom::Document*);
 619
 620 bool Gecko_MediaFeatures_ShouldAvoidNativeTheme(const mozilla::dom::Document*);
 621 bool Gecko_MediaFeatures_UseOverlayScrollbars(const mozilla::dom::Document*);
 622 int32_t Gecko_MediaFeatures_GetColorDepth(const mozilla::dom::Document*);
 623 int32_t Gecko_MediaFeatures_GetMonochromeBitsPerPixel(
 624     const mozilla::dom::Document*);
 625 mozilla::dom::ScreenColorGamut Gecko_MediaFeatures_ColorGamut(
 626     const mozilla::dom::Document*);
 627
 628 void Gecko_MediaFeatures_GetDeviceSize(const mozilla::dom::Document*,
 629                                        nscoord* width, nscoord* height);
 630
 631 float Gecko_MediaFeatures_GetResolution(const mozilla::dom::Document*);
 632 bool Gecko_MediaFeatures_PrefersReducedMotion(const mozilla::dom::Document*);
 633 bool Gecko_MediaFeatures_PrefersReducedTransparency(
 634     const mozilla::dom::Document*);
 635 mozilla::StylePrefersContrast Gecko_MediaFeatures_PrefersContrast(
 636     const mozilla::dom::Document*);
 637 mozilla::StylePrefersColorScheme Gecko_MediaFeatures_PrefersColorScheme(
 638     const mozilla::dom::Document*, bool aUseContent);
 639 bool Gecko_MediaFeatures_InvertedColors(const mozilla::dom::Document*);
 640 mozilla::StyleScripting Gecko_MediaFeatures_Scripting(
 641     const mozilla::dom::Document*);
 642
 643 mozilla::StyleDynamicRange Gecko_MediaFeatures_DynamicRange(
 644     const mozilla::dom::Document*);
 645 mozilla::StyleDynamicRange Gecko_MediaFeatures_VideoDynamicRange(
 646     const mozilla::dom::Document*);
 647
 648 mozilla::PointerCapabilities Gecko_MediaFeatures_PrimaryPointerCapabilities(
 649     const mozilla::dom::Document*);
 650
 651 mozilla::PointerCapabilities Gecko_MediaFeatures_AllPointerCapabilities(
 652     const mozilla::dom::Document*);
 653
 654 float Gecko_MediaFeatures_GetDevicePixelRatio(const mozilla::dom::Document*);
 655
 656 bool Gecko_MediaFeatures_IsResourceDocument(const mozilla::dom::Document*);
 657 bool Gecko_MediaFeatures_MatchesPlatform(mozilla::StylePlatform);
 658
 659 void Gecko_GetSafeAreaInsets(const nsPresContext*, float*, float*, float*,
 660                              float*);
 661
 662 void Gecko_PrintfStderr(const nsCString*);
 663
 664 }  // extern "C"
 665
 666 #endif  // mozilla_GeckoBindings_h