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 struct StyleStylesheetContents;
  41
  42 namespace css {
  43 class LoaderReusableStyleSheets;
  44 }
  45 namespace dom {
  46 enum class CompositeOperationOrAuto : uint8_t;
  47 enum class ScreenColorGamut : uint8_t;
  48 }  // namespace dom
  49 }  // namespace mozilla
  50
  51 #ifdef NIGHTLY_BUILD
  52 const bool GECKO_IS_NIGHTLY = true;
  53 #else
  54 const bool GECKO_IS_NIGHTLY = false;
  55 #endif
  56
  57 #define NS_DECL_THREADSAFE_FFI_REFCOUNTING(class_, name_)  \
  58   void Gecko_AddRef##name_##ArbitraryThread(class_* aPtr); \
  59   void Gecko_Release##name_##ArbitraryThread(class_* aPtr);
  60 #define NS_IMPL_THREADSAFE_FFI_REFCOUNTING(class_, name_)                      \
  61   static_assert(class_::HasThreadSafeRefCnt::value,                            \
  62                 "NS_DECL_THREADSAFE_FFI_REFCOUNTING can only be used with "    \
  63                 "classes that have thread-safe refcounting");                  \
  64   void Gecko_AddRef##name_##ArbitraryThread(class_* aPtr) { NS_ADDREF(aPtr); } \
  65   void Gecko_Release##name_##ArbitraryThread(class_* aPtr) { NS_RELEASE(aPtr); }
  66
  67 extern "C" {
  68
  69 NS_DECL_THREADSAFE_FFI_REFCOUNTING(nsIURI, nsIURI);
  70
  71 // Debugging stuff.
  72 void Gecko_Element_DebugListAttributes(const mozilla::dom::Element*,
  73                                        nsCString*);
  74
  75 void Gecko_Snapshot_DebugListAttributes(const mozilla::ServoElementSnapshot*,
  76                                         nsCString*);
  77
  78 bool Gecko_IsSignificantChild(const nsINode*, bool whitespace_is_significant);
  79
  80 const nsINode* Gecko_GetLastChild(const nsINode*);
  81 const nsINode* Gecko_GetFlattenedTreeParentNode(const nsINode*);
  82 const mozilla::dom::Element* Gecko_GetBeforeOrAfterPseudo(
  83     const mozilla::dom::Element*, bool is_before);
  84 const mozilla::dom::Element* Gecko_GetMarkerPseudo(
  85     const mozilla::dom::Element*);
  86
  87 nsTArray<nsIContent*>* Gecko_GetAnonymousContentForElement(
  88     const mozilla::dom::Element*);
  89 void Gecko_DestroyAnonymousContentList(nsTArray<nsIContent*>* anon_content);
  90
  91 const nsTArray<RefPtr<nsINode>>* Gecko_GetAssignedNodes(
  92     const mozilla::dom::Element*);
  93
  94 void Gecko_GetQueryContainerSize(const mozilla::dom::Element*,
  95                                  nscoord* aOutWidth, nscoord* aOutHeight);
  96
  97 void Gecko_ComputedStyle_Init(mozilla::ComputedStyle* context,
  98                               const ServoComputedData* values,
  99                               mozilla::PseudoStyleType pseudo_type);
 100
 101 void Gecko_ComputedStyle_Destroy(mozilla::ComputedStyle* context);
 102
 103 // By default, Servo walks the DOM by traversing the siblings of the DOM-view
 104 // first child. This generally works, but misses anonymous children, which we
 105 // want to traverse during styling. To support these cases, we create an
 106 // optional stack-allocated iterator in aIterator for nodes that need it.
 107 void Gecko_ConstructStyleChildrenIterator(const mozilla::dom::Element*,
 108                                           mozilla::dom::StyleChildrenIterator*);
 109
 110 void Gecko_DestroyStyleChildrenIterator(mozilla::dom::StyleChildrenIterator*);
 111
 112 const nsINode* Gecko_GetNextStyleChild(mozilla::dom::StyleChildrenIterator*);
 113
 114 nsAtom* Gecko_Element_ImportedPart(const nsAttrValue*, nsAtom*);
 115 nsAtom** Gecko_Element_ExportedParts(const nsAttrValue*, nsAtom*,
 116                                      size_t* aOutLength);
 117
 118 NS_DECL_THREADSAFE_FFI_REFCOUNTING(mozilla::css::SheetLoadDataHolder,
 119                                    SheetLoadDataHolder);
 120
 121 void Gecko_StyleSheet_FinishAsyncParse(
 122     mozilla::css::SheetLoadDataHolder* data,
 123     mozilla::StyleStrong<mozilla::StyleStylesheetContents> sheet_contents,
 124     mozilla::StyleUseCounters* use_counters);
 125
 126 mozilla::StyleSheet* Gecko_LoadStyleSheet(
 127     mozilla::css::Loader* loader, mozilla::StyleSheet* parent,
 128     mozilla::css::SheetLoadData* parent_load_data,
 129     mozilla::css::LoaderReusableStyleSheets* reusable_sheets,
 130     const mozilla::StyleCssUrl* url,
 131     mozilla::StyleStrong<mozilla::StyleLockedMediaList> media_list);
 132
 133 void Gecko_LoadStyleSheetAsync(
 134     mozilla::css::SheetLoadDataHolder* parent_data,
 135     const mozilla::StyleCssUrl* url,
 136     mozilla::StyleStrong<mozilla::StyleLockedMediaList>,
 137     mozilla::StyleStrong<mozilla::StyleLockedImportRule>);
 138
 139 // Selector Matching.
 140 uint64_t Gecko_ElementState(const mozilla::dom::Element*);
 141 bool Gecko_IsRootElement(const mozilla::dom::Element*);
 142
 143 bool Gecko_MatchLang(const mozilla::dom::Element*, nsAtom* override_lang,
 144                      bool has_override_lang, const char16_t* value);
 145
 146 nsAtom* Gecko_GetXMLLangValue(const mozilla::dom::Element*);
 147
 148 const mozilla::PreferenceSheet::Prefs* Gecko_GetPrefSheetPrefs(
 149     const mozilla::dom::Document*);
 150
 151 bool Gecko_IsTableBorderNonzero(const mozilla::dom::Element* element);
 152 bool Gecko_IsBrowserFrame(const mozilla::dom::Element* element);
 153 bool Gecko_IsSelectListBox(const mozilla::dom::Element* element);
 154
 155 // Attributes.
 156 #define SERVO_DECLARE_ELEMENT_ATTR_MATCHING_FUNCTIONS(prefix_, implementor_) \
 157   nsAtom* prefix_##LangValue(implementor_ element);
 158
 159 bool Gecko_AttrEquals(const nsAttrValue*, const nsAtom*, bool aIgnoreCase);
 160 bool Gecko_AttrDashEquals(const nsAttrValue*, const nsAtom*, bool aIgnoreCase);
 161 bool Gecko_AttrIncludes(const nsAttrValue*, const nsAtom*, bool aIgnoreCase);
 162 bool Gecko_AttrHasSubstring(const nsAttrValue*, const nsAtom*,
 163                             bool aIgnoreCase);
 164 bool Gecko_AttrHasPrefix(const nsAttrValue*, const nsAtom*, bool aIgnoreCase);
 165 bool Gecko_AttrHasSuffix(const nsAttrValue*, const nsAtom*, bool aIgnoreCase);
 166
 167 bool Gecko_AssertClassAttrValueIsSane(const nsAttrValue*);
 168 const nsAttrValue* Gecko_GetSVGAnimatedClass(const mozilla::dom::Element*);
 169
 170 SERVO_DECLARE_ELEMENT_ATTR_MATCHING_FUNCTIONS(Gecko_,
 171                                               const mozilla::dom::Element*)
 172
 173 SERVO_DECLARE_ELEMENT_ATTR_MATCHING_FUNCTIONS(
 174     Gecko_Snapshot, const mozilla::ServoElementSnapshot*)
 175
 176 #undef SERVO_DECLARE_ELEMENT_ATTR_MATCHING_FUNCTIONS
 177
 178 // Style attributes.
 179 const mozilla::StyleLockedDeclarationBlock* Gecko_GetStyleAttrDeclarationBlock(
 180     const mozilla::dom::Element* element);
 181
 182 void Gecko_UnsetDirtyStyleAttr(const mozilla::dom::Element* element);
 183
 184 const mozilla::StyleLockedDeclarationBlock*
 185 Gecko_GetHTMLPresentationAttrDeclarationBlock(
 186     const mozilla::dom::Element* element);
 187
 188 const mozilla::StyleLockedDeclarationBlock*
 189 Gecko_GetExtraContentStyleDeclarations(const mozilla::dom::Element* element);
 190
 191 const mozilla::StyleLockedDeclarationBlock*
 192 Gecko_GetUnvisitedLinkAttrDeclarationBlock(
 193     const mozilla::dom::Element* element);
 194
 195 const mozilla::StyleLockedDeclarationBlock*
 196 Gecko_GetVisitedLinkAttrDeclarationBlock(const mozilla::dom::Element* element);
 197
 198 const mozilla::StyleLockedDeclarationBlock*
 199 Gecko_GetActiveLinkAttrDeclarationBlock(const mozilla::dom::Element* element);
 200
 201 // Visited handling.
 202
 203 // Returns whether visited styles are enabled for a given document.
 204 bool Gecko_VisitedStylesEnabled(const mozilla::dom::Document*);
 205
 206 // Animations
 207 bool Gecko_GetAnimationRule(
 208     const mozilla::dom::Element* aElementOrPseudo,
 209     mozilla::EffectCompositor::CascadeLevel aCascadeLevel,
 210     mozilla::StyleAnimationValueMap* aAnimationValues);
 211
 212 bool Gecko_StyleAnimationsEquals(
 213     const nsStyleAutoArray<mozilla::StyleAnimation>*,
 214     const nsStyleAutoArray<mozilla::StyleAnimation>*);
 215
 216 bool Gecko_StyleScrollTimelinesEquals(
 217     const nsStyleAutoArray<mozilla::StyleScrollTimeline>*,
 218     const nsStyleAutoArray<mozilla::StyleScrollTimeline>*);
 219
 220 bool Gecko_StyleViewTimelinesEquals(
 221     const nsStyleAutoArray<mozilla::StyleViewTimeline>*,
 222     const nsStyleAutoArray<mozilla::StyleViewTimeline>*);
 223
 224 void Gecko_CopyAnimationNames(
 225     nsStyleAutoArray<mozilla::StyleAnimation>* aDest,
 226     const nsStyleAutoArray<mozilla::StyleAnimation>* aSrc);
 227
 228 // This function takes an already addrefed nsAtom
 229 void Gecko_SetAnimationName(mozilla::StyleAnimation* aStyleAnimation,
 230                             nsAtom* aAtom);
 231
 232 void Gecko_UpdateAnimations(const mozilla::dom::Element* aElementOrPseudo,
 233                             const mozilla::ComputedStyle* aOldComputedValues,
 234                             const mozilla::ComputedStyle* aComputedValues,
 235                             mozilla::UpdateAnimationsTasks aTasks);
 236
 237 size_t Gecko_GetAnimationEffectCount(
 238     const mozilla::dom::Element* aElementOrPseudo);
 239 bool Gecko_ElementHasAnimations(const mozilla::dom::Element* aElementOrPseudo);
 240 bool Gecko_ElementHasCSSAnimations(
 241     const mozilla::dom::Element* aElementOrPseudo);
 242 bool Gecko_ElementHasCSSTransitions(
 243     const mozilla::dom::Element* aElementOrPseudo);
 244 bool Gecko_ElementHasWebAnimations(
 245     const mozilla::dom::Element* aElementOrPseudo);
 246 size_t Gecko_ElementTransitions_Length(
 247     const mozilla::dom::Element* aElementOrPseudo);
 248
 249 nsCSSPropertyID Gecko_ElementTransitions_PropertyAt(
 250     const mozilla::dom::Element* aElementOrPseudo, size_t aIndex);
 251
 252 const mozilla::StyleAnimationValue* Gecko_ElementTransitions_EndValueAt(
 253     const mozilla::dom::Element* aElementOrPseudo, size_t aIndex);
 254
 255 double Gecko_GetProgressFromComputedTiming(const mozilla::ComputedTiming*);
 256
 257 double Gecko_GetPositionInSegment(const mozilla::AnimationPropertySegment*,
 258                                   double aProgress, bool aBeforeFlag);
 259
 260 // Get servo's AnimationValue for |aProperty| from the cached base style
 261 // |aBaseStyles|.
 262 // |aBaseStyles| is nsRefPtrHashtable<nsUint32HashKey, StyleAnimationValue>.
 263 // We use RawServoAnimationValueTableBorrowed to avoid exposing
 264 // nsRefPtrHashtable in FFI.
 265 const mozilla::StyleAnimationValue* Gecko_AnimationGetBaseStyle(
 266     const RawServoAnimationValueTable* aBaseStyles, nsCSSPropertyID aProperty);
 267
 268 void Gecko_StyleTransition_SetUnsupportedProperty(
 269     mozilla::StyleTransition* aTransition, nsAtom* aAtom);
 270
 271 // Atoms.
 272 nsAtom* Gecko_Atomize(const char* aString, uint32_t aLength);
 273 nsAtom* Gecko_Atomize16(const nsAString* aString);
 274 void Gecko_AddRefAtom(nsAtom* aAtom);
 275 void Gecko_ReleaseAtom(nsAtom* aAtom);
 276
 277 // will not run destructors on dst, give it uninitialized memory
 278 // font_id is LookAndFeel::FontID
 279 void Gecko_nsFont_InitSystem(nsFont* dst, mozilla::StyleSystemFont font_id,
 280                              const nsStyleFont* font,
 281                              const mozilla::dom::Document*);
 282
 283 void Gecko_nsFont_Destroy(nsFont* dst);
 284
 285 // The gfxFontFeatureValueSet returned from this function has zero reference.
 286 gfxFontFeatureValueSet* Gecko_ConstructFontFeatureValueSet();
 287
 288 nsTArray<uint32_t>* Gecko_AppendFeatureValueHashEntry(
 289     gfxFontFeatureValueSet* value_set, nsAtom* family, uint32_t alternate,
 290     nsAtom* name);
 291
 292 // Font variant alternates
 293 void Gecko_ClearAlternateValues(nsFont* font, size_t length);
 294
 295 void Gecko_AppendAlternateValues(nsFont* font, uint32_t alternate_name,
 296                                  nsAtom* atom);
 297
 298 void Gecko_CopyAlternateValuesFrom(nsFont* dest, const nsFont* src);
 299
 300 // The FontPaletteValueSet returned from this function has zero reference.
 301 mozilla::gfx::FontPaletteValueSet* Gecko_ConstructFontPaletteValueSet();
 302
 303 mozilla::gfx::FontPaletteValueSet::PaletteValues*
 304 Gecko_AppendPaletteValueHashEntry(
 305     mozilla::gfx::FontPaletteValueSet* aPaletteValueSet, nsAtom* aFamily,
 306     nsAtom* aName);
 307
 308 void Gecko_SetFontPaletteBase(
 309     mozilla::gfx::FontPaletteValueSet::PaletteValues* aValues,
 310     int32_t aBasePaletteIndex);
 311
 312 void Gecko_SetFontPaletteOverride(
 313     mozilla::gfx::FontPaletteValueSet::PaletteValues* aValues, int32_t aIndex,
 314     mozilla::StyleAbsoluteColor* aColor);
 315
 316 // Visibility style
 317 void Gecko_SetImageOrientation(nsStyleVisibility* aVisibility,
 318                                uint8_t aOrientation, bool aFlip);
 319
 320 void Gecko_SetImageOrientationAsFromImage(nsStyleVisibility* aVisibility);
 321
 322 void Gecko_CopyImageOrientationFrom(nsStyleVisibility* aDst,
 323                                     const nsStyleVisibility* aSrc);
 324
 325 // Counter style.
 326 void Gecko_CounterStyle_ToPtr(const mozilla::StyleCounterStyle*,
 327                               mozilla::CounterStylePtr*);
 328
 329 void Gecko_SetCounterStyleToNone(mozilla::CounterStylePtr*);
 330
 331 void Gecko_SetCounterStyleToString(mozilla::CounterStylePtr* ptr,
 332                                    const nsACString* symbol);
 333
 334 void Gecko_CopyCounterStyle(mozilla::CounterStylePtr* dst,
 335                             const mozilla::CounterStylePtr* src);
 336
 337 nsAtom* Gecko_CounterStyle_GetName(const mozilla::CounterStylePtr* ptr);
 338
 339 const mozilla::AnonymousCounterStyle* Gecko_CounterStyle_GetAnonymous(
 340     const mozilla::CounterStylePtr* ptr);
 341
 342 // list-style-image style.
 343 void Gecko_SetListStyleImageNone(nsStyleList* style_struct);
 344
 345 void Gecko_SetListStyleImageImageValue(
 346     nsStyleList* style_struct, const mozilla::StyleComputedImageUrl* url);
 347
 348 void Gecko_CopyListStyleImageFrom(nsStyleList* dest, const nsStyleList* src);
 349
 350 // Dirtiness tracking.
 351 void Gecko_NoteDirtyElement(const mozilla::dom::Element*);
 352 void Gecko_NoteDirtySubtreeForInvalidation(const mozilla::dom::Element*);
 353 void Gecko_NoteAnimationOnlyDirtyElement(const mozilla::dom::Element*);
 354
 355 bool Gecko_AnimationNameMayBeReferencedFromStyle(const nsPresContext*,
 356                                                  nsAtom* name);
 357
 358 float Gecko_GetScrollbarInlineSize(const nsPresContext*);
 359
 360 // Incremental restyle.
 361 mozilla::PseudoStyleType Gecko_GetImplementedPseudo(
 362     const mozilla::dom::Element*);
 363
 364 // We'd like to return `nsChangeHint` here, but bindgen bitfield enums don't
 365 // work as return values with the Linux 32-bit ABI at the moment because
 366 // they wrap the value in a struct.
 367 uint32_t Gecko_CalcStyleDifference(const mozilla::ComputedStyle* old_style,
 368                                    const mozilla::ComputedStyle* new_style,
 369                                    bool* any_style_struct_changed,
 370                                    bool* reset_only_changed);
 371
 372 nscoord Gecko_CalcLineHeight(const mozilla::StyleLineHeight*,
 373                              const nsPresContext*, bool aVertical,
 374                              const nsStyleFont* aAgainstFont,
 375                              const mozilla::dom::Element* aElement);
 376
 377 // Get an element snapshot for a given element from the table.
 378 const mozilla::ServoElementSnapshot* Gecko_GetElementSnapshot(
 379     const mozilla::ServoElementSnapshotTable* table,
 380     const mozilla::dom::Element*);
 381
 382 // Have we seen this pointer before?
 383 bool Gecko_HaveSeenPtr(mozilla::SeenPtrs* table, const void* ptr);
 384
 385 // `array` must be an nsTArray
 386 // If changing this signature, please update the
 387 // friend function declaration in nsTArray.h
 388 void Gecko_EnsureTArrayCapacity(void* array, size_t capacity, size_t elem_size);
 389
 390 // Same here, `array` must be an nsTArray<T>, for some T.
 391 //
 392 // Important note: Only valid for POD types, since destructors won't be run
 393 // otherwise. This is ensured with rust traits for the relevant structs.
 394 void Gecko_ClearPODTArray(void* array, size_t elem_size, size_t elem_align);
 395
 396 void Gecko_ResizeTArrayForStrings(nsTArray<nsString>* array, uint32_t length);
 397 void Gecko_ResizeAtomArray(nsTArray<RefPtr<nsAtom>>* array, uint32_t length);
 398
 399 void Gecko_EnsureImageLayersLength(nsStyleImageLayers* layers, size_t len,
 400                                    nsStyleImageLayers::LayerType layer_type);
 401
 402 void Gecko_EnsureStyleAnimationArrayLength(void* array, size_t len);
 403 void Gecko_EnsureStyleTransitionArrayLength(void* array, size_t len);
 404 void Gecko_EnsureStyleScrollTimelineArrayLength(void* array, size_t len);
 405 void Gecko_EnsureStyleViewTimelineArrayLength(void* array, size_t len);
 406
 407 // Searches from the beginning of |keyframes| for a Keyframe object with the
 408 // specified offset and timing function. If none is found, a new Keyframe object
 409 // with the specified |offset| and |timingFunction| will be prepended to
 410 // |keyframes|.
 411 //
 412 // @param keyframes  An array of Keyframe objects, sorted by offset.
 413 //                   The first Keyframe in the array, if any, MUST have an
 414 //                   offset greater than or equal to |offset|.
 415 // @param offset  The offset to search for, or, if no suitable Keyframe is
 416 //                found, the offset to use for the created Keyframe.
 417 //                Must be a floating point number in the range [0.0, 1.0].
 418 // @param timingFunction  The timing function to match, or, if no suitable
 419 //                        Keyframe is found, to set on the created Keyframe.
 420 // @param composition  The composition to match, or, if no suitable Keyframe is
 421 //                     found, to set on the created Keyframe.
 422 //
 423 // @returns  The matching or created Keyframe.
 424 mozilla::Keyframe* Gecko_GetOrCreateKeyframeAtStart(
 425     nsTArray<mozilla::Keyframe>* keyframes, float offset,
 426     const mozilla::StyleComputedTimingFunction* timingFunction,
 427     const mozilla::dom::CompositeOperationOrAuto composition);
 428
 429 // As with Gecko_GetOrCreateKeyframeAtStart except that this method will search
 430 // from the beginning of |keyframes| for a Keyframe with matching timing
 431 // function, composition, and an offset of 0.0.
 432 // Furthermore, if a matching Keyframe is not found, a new Keyframe will be
 433 // inserted after the *last* Keyframe in |keyframes| with offset 0.0.
 434 mozilla::Keyframe* Gecko_GetOrCreateInitialKeyframe(
 435     nsTArray<mozilla::Keyframe>* keyframes,
 436     const mozilla::StyleComputedTimingFunction* timingFunction,
 437     const mozilla::dom::CompositeOperationOrAuto composition);
 438
 439 // As with Gecko_GetOrCreateKeyframeAtStart except that this method will search
 440 // from the *end* of |keyframes| for a Keyframe with matching timing function,
 441 // composition, and an offset of 1.0. If a matching Keyframe is not found, a new
 442 // Keyframe will be appended to the end of |keyframes|.
 443 mozilla::Keyframe* Gecko_GetOrCreateFinalKeyframe(
 444     nsTArray<mozilla::Keyframe>* keyframes,
 445     const mozilla::StyleComputedTimingFunction* timingFunction,
 446     const mozilla::dom::CompositeOperationOrAuto composition);
 447
 448 // Appends and returns a new PropertyValuePair to |aProperties| initialized with
 449 // its mProperty member set to |aProperty| and all other members initialized to
 450 // their default values.
 451 mozilla::PropertyValuePair* Gecko_AppendPropertyValuePair(
 452     nsTArray<mozilla::PropertyValuePair>*, nsCSSPropertyID aProperty);
 453
 454 void Gecko_ResetFilters(nsStyleEffects* effects, size_t new_len);
 455
 456 void Gecko_CopyFiltersFrom(nsStyleEffects* aSrc, nsStyleEffects* aDest);
 457
 458 void Gecko_nsStyleSVG_SetDashArrayLength(nsStyleSVG* svg, uint32_t len);
 459
 460 void Gecko_nsStyleSVG_CopyDashArray(nsStyleSVG* dst, const nsStyleSVG* src);
 461
 462 void Gecko_nsStyleSVG_SetContextPropertiesLength(nsStyleSVG* svg, uint32_t len);
 463
 464 void Gecko_nsStyleSVG_CopyContextProperties(nsStyleSVG* dst,
 465                                             const nsStyleSVG* src);
 466
 467 void Gecko_GetComputedURLSpec(const mozilla::StyleComputedUrl* url,
 468                               nsCString* spec);
 469
 470 void Gecko_GetComputedImageURLSpec(const mozilla::StyleComputedUrl* url,
 471                                    nsCString* spec);
 472
 473 // Return true if the given image MIME type is supported
 474 bool Gecko_IsSupportedImageMimeType(const uint8_t* mime_type,
 475                                     const uint32_t len);
 476
 477 void Gecko_nsIURI_Debug(nsIURI*, nsCString* spec);
 478
 479 void Gecko_nsIReferrerInfo_Debug(nsIReferrerInfo* aReferrerInfo,
 480                                  nsCString* aOut);
 481
 482 NS_DECL_THREADSAFE_FFI_REFCOUNTING(mozilla::URLExtraData, URLExtraData);
 483 NS_DECL_THREADSAFE_FFI_REFCOUNTING(nsIReferrerInfo, nsIReferrerInfo);
 484
 485 void Gecko_FillAllImageLayers(nsStyleImageLayers* layers, uint32_t max_len);
 486
 487 void Gecko_LoadData_Drop(mozilla::StyleLoadData*);
 488
 489 void Gecko_nsStyleFont_SetLang(nsStyleFont* font, nsAtom* atom);
 490
 491 void Gecko_nsStyleFont_CopyLangFrom(nsStyleFont* aFont,
 492                                     const nsStyleFont* aSource);
 493
 494 mozilla::Length Gecko_nsStyleFont_ComputeMinSize(const nsStyleFont*,
 495                                                  const mozilla::dom::Document*);
 496
 497 // Computes the default generic font for a language.
 498 mozilla::StyleGenericFontFamily
 499 Gecko_nsStyleFont_ComputeFallbackFontTypeForLanguage(
 500     const mozilla::dom::Document*, nsAtom* language);
 501
 502 mozilla::Length Gecko_GetBaseSize(const mozilla::dom::Document*,
 503                                   nsAtom* language,
 504                                   mozilla::StyleGenericFontFamily);
 505
 506 struct GeckoFontMetrics {
 507   mozilla::Length mXSize;
 508   mozilla::Length mChSize;     // negatives indicate not found.
 509   mozilla::Length mCapHeight;  // negatives indicate not found.
 510   mozilla::Length mIcWidth;    // negatives indicate not found.
 511   mozilla::Length mAscent;
 512   mozilla::Length mComputedEmSize;
 513   float mScriptPercentScaleDown;        // zero is invalid or means not found.
 514   float mScriptScriptPercentScaleDown;  // zero is invalid or means not found.
 515 };
 516
 517 GeckoFontMetrics Gecko_GetFontMetrics(const nsPresContext*, bool is_vertical,
 518                                       const nsStyleFont* font,
 519                                       mozilla::Length font_size,
 520                                       bool use_user_font_set,
 521                                       bool retrieve_math_scales);
 522
 523 mozilla::StyleSheet* Gecko_StyleSheet_Clone(
 524     const mozilla::StyleSheet* aSheet,
 525     const mozilla::StyleSheet* aNewParentSheet);
 526
 527 void Gecko_StyleSheet_AddRef(const mozilla::StyleSheet* aSheet);
 528 void Gecko_StyleSheet_Release(const mozilla::StyleSheet* aSheet);
 529 bool Gecko_IsDocumentBody(const mozilla::dom::Element* element);
 530
 531 bool Gecko_IsDarkColorScheme(const mozilla::dom::Document*,
 532                              const mozilla::StyleColorScheme*);
 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 bool Gecko_ComputeBoolPrefMediaQuery(nsAtom*);
 593
 594 // Check whether font format/tech is supported.
 595 bool Gecko_IsFontFormatSupported(
 596     mozilla::StyleFontFaceSourceFormatKeyword aFormat);
 597 bool Gecko_IsFontTechSupported(mozilla::StyleFontFaceSourceTechFlags aFlag);
 598
 599 bool Gecko_IsKnownIconFontFamily(const nsAtom* aFamilyName);
 600
 601 // Returns true if we're currently performing the servo traversal.
 602 bool Gecko_IsInServoTraversal();
 603
 604 // Returns true if we're currently on the main thread.
 605 bool Gecko_IsMainThread();
 606
 607 // Returns true if we're currently on a DOM worker thread.
 608 bool Gecko_IsDOMWorkerThread();
 609
 610 // Returns the preferred number of style threads to use, or -1 for no
 611 // preference.
 612 int32_t Gecko_GetNumStyleThreads();
 613
 614 // Media feature helpers.
 615 //
 616 // Defined in nsMediaFeatures.cpp.
 617 mozilla::StyleDisplayMode Gecko_MediaFeatures_GetDisplayMode(
 618     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