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