Add m-esr52 at 52.6.0

1 files changed, 285 insertions, 0 deletions

diff --git a/layout/style/ServoBindings.h b/layout/style/ServoBindings.h
new file mode 100644
index 000000000..81ea48d5b
--- /dev/null
+++ b/layout/style/ServoBindings.h
@@ -0,0 +1,285 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_ServoBindings_h
+#define mozilla_ServoBindings_h
+
+#include <stdint.h>
+
+#include "mozilla/ServoTypes.h"
+#include "mozilla/ServoBindingTypes.h"
+#include "mozilla/ServoElementSnapshot.h"
+#include "mozilla/css/SheetParsingMode.h"
+#include "nsChangeHint.h"
+#include "nsStyleStruct.h"
+
+/*
+ * API for Servo to access Gecko data structures. This file must compile as valid
+ * C code in order for the binding generator to parse it.
+ *
+ * Functions beginning with Gecko_ are implemented in Gecko and invoked from Servo.
+ * Functions beginning with Servo_ are implemented in Servo and invoked from Gecko.
+ */
+
+class nsIAtom;
+class nsIPrincipal;
+class nsIURI;
+struct nsFont;
+namespace mozilla {
+  class FontFamilyList;
+  enum FontFamilyType : uint32_t;
+}
+using mozilla::FontFamilyList;
+using mozilla::FontFamilyType;
+using mozilla::ServoElementSnapshot;
+struct nsStyleList;
+struct nsStyleImage;
+struct nsStyleGradientStop;
+class nsStyleGradient;
+class nsStyleCoord;
+struct nsStyleDisplay;
+
+#define NS_DECL_THREADSAFE_FFI_REFCOUNTING(class_, name_)                     \
+  void Gecko_AddRef##name_##ArbitraryThread(class_* aPtr);                    \
+  void Gecko_Release##name_##ArbitraryThread(class_* aPtr);
+#define NS_IMPL_THREADSAFE_FFI_REFCOUNTING(class_, name_)                     \
+  static_assert(class_::HasThreadSafeRefCnt::value,                           \
+                "NS_DECL_THREADSAFE_FFI_REFCOUNTING can only be used with "   \
+                "classes that have thread-safe refcounting");                 \
+  void Gecko_AddRef##name_##ArbitraryThread(class_* aPtr)                     \
+  { NS_ADDREF(aPtr); }                                                        \
+  void Gecko_Release##name_##ArbitraryThread(class_* aPtr)                    \
+  { NS_RELEASE(aPtr); }
+
+#define NS_DECL_HOLDER_FFI_REFCOUNTING(class_, name_)                         \
+  typedef nsMainThreadPtrHolder<class_> ThreadSafe##name_##Holder;            \
+  void Gecko_AddRef##name_##ArbitraryThread(ThreadSafe##name_##Holder* aPtr); \
+  void Gecko_Release##name_##ArbitraryThread(ThreadSafe##name_##Holder* aPtr);
+#define NS_IMPL_HOLDER_FFI_REFCOUNTING(class_, name_)                         \
+  void Gecko_AddRef##name_##ArbitraryThread(ThreadSafe##name_##Holder* aPtr)  \
+  { NS_ADDREF(aPtr); }                                                        \
+  void Gecko_Release##name_##ArbitraryThread(ThreadSafe##name_##Holder* aPtr) \
+  { NS_RELEASE(aPtr); }                                                       \
+
+extern "C" {
+
+// Object refcounting.
+NS_DECL_HOLDER_FFI_REFCOUNTING(nsIPrincipal, Principal)
+NS_DECL_HOLDER_FFI_REFCOUNTING(nsIURI, URI)
+
+// DOM Traversal.
+uint32_t Gecko_ChildrenCount(RawGeckoNodeBorrowed node);
+bool Gecko_NodeIsElement(RawGeckoNodeBorrowed node);
+RawGeckoNodeBorrowedOrNull Gecko_GetParentNode(RawGeckoNodeBorrowed node);
+RawGeckoNodeBorrowedOrNull Gecko_GetFirstChild(RawGeckoNodeBorrowed node);
+RawGeckoNodeBorrowedOrNull Gecko_GetLastChild(RawGeckoNodeBorrowed node);
+RawGeckoNodeBorrowedOrNull Gecko_GetPrevSibling(RawGeckoNodeBorrowed node);
+RawGeckoNodeBorrowedOrNull Gecko_GetNextSibling(RawGeckoNodeBorrowed node);
+RawGeckoElementBorrowedOrNull Gecko_GetParentElement(RawGeckoElementBorrowed element);
+RawGeckoElementBorrowedOrNull Gecko_GetFirstChildElement(RawGeckoElementBorrowed element);
+RawGeckoElementBorrowedOrNull Gecko_GetLastChildElement(RawGeckoElementBorrowed element);
+RawGeckoElementBorrowedOrNull Gecko_GetPrevSiblingElement(RawGeckoElementBorrowed element);
+RawGeckoElementBorrowedOrNull Gecko_GetNextSiblingElement(RawGeckoElementBorrowed element);
+RawGeckoElementBorrowedOrNull Gecko_GetDocumentElement(RawGeckoDocumentBorrowed document);
+
+// By default, Servo walks the DOM by traversing the siblings of the DOM-view
+// first child. This generally works, but misses anonymous children, which we
+// want to traverse during styling. To support these cases, we create an
+// optional heap-allocated iterator for nodes that need it. If the creation
+// method returns null, Servo falls back to the aforementioned simpler (and
+// faster) sibling traversal.
+StyleChildrenIteratorOwnedOrNull Gecko_MaybeCreateStyleChildrenIterator(RawGeckoNodeBorrowed node);
+void Gecko_DropStyleChildrenIterator(StyleChildrenIteratorOwned it);
+RawGeckoNodeBorrowedOrNull Gecko_GetNextStyleChild(StyleChildrenIteratorBorrowedMut it);
+
+// Selector Matching.
+uint8_t Gecko_ElementState(RawGeckoElementBorrowed element);
+bool Gecko_IsHTMLElementInHTMLDocument(RawGeckoElementBorrowed element);
+bool Gecko_IsLink(RawGeckoElementBorrowed element);
+bool Gecko_IsTextNode(RawGeckoNodeBorrowed node);
+bool Gecko_IsVisitedLink(RawGeckoElementBorrowed element);
+bool Gecko_IsUnvisitedLink(RawGeckoElementBorrowed element);
+bool Gecko_IsRootElement(RawGeckoElementBorrowed element);
+nsIAtom* Gecko_LocalName(RawGeckoElementBorrowed element);
+nsIAtom* Gecko_Namespace(RawGeckoElementBorrowed element);
+nsIAtom* Gecko_GetElementId(RawGeckoElementBorrowed element);
+
+// Attributes.
+#define SERVO_DECLARE_ELEMENT_ATTR_MATCHING_FUNCTIONS(prefix_, implementor_)  \
+  nsIAtom* prefix_##AtomAttrValue(implementor_ element, nsIAtom* attribute);  \
+  bool prefix_##HasAttr(implementor_ element, nsIAtom* ns, nsIAtom* name);    \
+  bool prefix_##AttrEquals(implementor_ element, nsIAtom* ns, nsIAtom* name,  \
+                           nsIAtom* str, bool ignoreCase);                    \
+  bool prefix_##AttrDashEquals(implementor_ element, nsIAtom* ns,             \
+                               nsIAtom* name, nsIAtom* str);                  \
+  bool prefix_##AttrIncludes(implementor_ element, nsIAtom* ns,               \
+                             nsIAtom* name, nsIAtom* str);                    \
+  bool prefix_##AttrHasSubstring(implementor_ element, nsIAtom* ns,           \
+                                 nsIAtom* name, nsIAtom* str);                \
+  bool prefix_##AttrHasPrefix(implementor_ element, nsIAtom* ns,              \
+                              nsIAtom* name, nsIAtom* str);                   \
+  bool prefix_##AttrHasSuffix(implementor_ element, nsIAtom* ns,              \
+                              nsIAtom* name, nsIAtom* str);                   \
+  uint32_t prefix_##ClassOrClassList(implementor_ element, nsIAtom** class_,  \
+                                     nsIAtom*** classList);
+
+SERVO_DECLARE_ELEMENT_ATTR_MATCHING_FUNCTIONS(Gecko_, RawGeckoElementBorrowed)
+SERVO_DECLARE_ELEMENT_ATTR_MATCHING_FUNCTIONS(Gecko_Snapshot,
+                                              ServoElementSnapshot*)
+
+#undef SERVO_DECLARE_ELEMENT_ATTR_MATCHING_FUNCTIONS
+
+// Style attributes.
+RawServoDeclarationBlockStrongBorrowedOrNull
+Gecko_GetServoDeclarationBlock(RawGeckoElementBorrowed element);
+
+// Atoms.
+nsIAtom* Gecko_Atomize(const char* aString, uint32_t aLength);
+void Gecko_AddRefAtom(nsIAtom* aAtom);
+void Gecko_ReleaseAtom(nsIAtom* aAtom);
+const uint16_t* Gecko_GetAtomAsUTF16(nsIAtom* aAtom, uint32_t* aLength);
+bool Gecko_AtomEqualsUTF8(nsIAtom* aAtom, const char* aString, uint32_t aLength);
+bool Gecko_AtomEqualsUTF8IgnoreCase(nsIAtom* aAtom, const char* aString, uint32_t aLength);
+
+// Strings (temporary until bug 1294742)
+void Gecko_Utf8SliceToString(nsString* aString,
+                             const uint8_t* aBuffer,
+                             size_t aBufferLen);
+
+// Font style
+void Gecko_FontFamilyList_Clear(FontFamilyList* aList);
+void Gecko_FontFamilyList_AppendNamed(FontFamilyList* aList, nsIAtom* aName);
+void Gecko_FontFamilyList_AppendGeneric(FontFamilyList* list, FontFamilyType familyType);
+void Gecko_CopyFontFamilyFrom(nsFont* dst, const nsFont* src);
+
+// Counter style.
+void Gecko_SetListStyleType(nsStyleList* style_struct, uint32_t type);
+void Gecko_CopyListStyleTypeFrom(nsStyleList* dst, const nsStyleList* src);
+
+// background-image style.
+// TODO: support element() and -moz-image()
+void Gecko_SetNullImageValue(nsStyleImage* image);
+void Gecko_SetGradientImageValue(nsStyleImage* image, nsStyleGradient* gradient);
+void Gecko_SetUrlImageValue(nsStyleImage* image,
+                            const uint8_t* url_bytes,
+                            uint32_t url_length,
+                            ThreadSafeURIHolder* base_uri,
+                            ThreadSafeURIHolder* referrer,
+                            ThreadSafePrincipalHolder* principal);
+void Gecko_CopyImageValueFrom(nsStyleImage* image, const nsStyleImage* other);
+
+nsStyleGradient* Gecko_CreateGradient(uint8_t shape,
+                                      uint8_t size,
+                                      bool repeating,
+                                      bool legacy_syntax,
+                                      uint32_t stops);
+
+// list-style-image style.
+void Gecko_SetListStyleImageNone(nsStyleList* style_struct);
+void Gecko_SetListStyleImage(nsStyleList* style_struct,
+                             const uint8_t* string_bytes, uint32_t string_length,
+                             ThreadSafeURIHolder* base_uri,
+                             ThreadSafeURIHolder* referrer,
+                             ThreadSafePrincipalHolder* principal);
+void Gecko_CopyListStyleImageFrom(nsStyleList* dest, const nsStyleList* src);
+
+// Display style.
+void Gecko_SetMozBinding(nsStyleDisplay* style_struct,
+                         const uint8_t* string_bytes, uint32_t string_length,
+                         ThreadSafeURIHolder* base_uri,
+                         ThreadSafeURIHolder* referrer,
+                         ThreadSafePrincipalHolder* principal);
+void Gecko_CopyMozBindingFrom(nsStyleDisplay* des, const nsStyleDisplay* src);
+
+// Dirtiness tracking.
+uint32_t Gecko_GetNodeFlags(RawGeckoNodeBorrowed node);
+void Gecko_SetNodeFlags(RawGeckoNodeBorrowed node, uint32_t flags);
+void Gecko_UnsetNodeFlags(RawGeckoNodeBorrowed node, uint32_t flags);
+
+// Incremental restyle.
+// TODO: We would avoid a few ffi calls if we decide to make an API like the
+// former CalcAndStoreStyleDifference, but that would effectively mean breaking
+// some safety guarantees in the servo side.
+//
+// Also, we might want a ComputedValues to ComputedValues API for animations?
+// Not if we do them in Gecko...
+nsStyleContext* Gecko_GetStyleContext(RawGeckoNodeBorrowed node,
+                                      nsIAtom* aPseudoTagOrNull);
+nsChangeHint Gecko_CalcStyleDifference(nsStyleContext* oldstyle,
+                                       ServoComputedValuesBorrowed newstyle);
+void Gecko_StoreStyleDifference(RawGeckoNodeBorrowed node, nsChangeHint change);
+
+// `array` must be an nsTArray
+// If changing this signature, please update the
+// friend function declaration in nsTArray.h
+void Gecko_EnsureTArrayCapacity(void* array, size_t capacity, size_t elem_size);
+
+// Same here, `array` must be an nsTArray<T>, for some T.
+//
+// Important note: Only valid for POD types, since destructors won't be run
+// otherwise. This is ensured with rust traits for the relevant structs.
+void Gecko_ClearPODTArray(void* array, size_t elem_size, size_t elem_align);
+
+// Clear the mContents field in nsStyleContent. This is needed to run the
+// destructors, otherwise we'd leak the images (though we still don't support
+// those), strings, and whatnot.
+void Gecko_ClearStyleContents(nsStyleContent* content);
+void Gecko_CopyStyleContentsFrom(nsStyleContent* content, const nsStyleContent* other);
+
+void Gecko_EnsureImageLayersLength(nsStyleImageLayers* layers, size_t len,
+                                   nsStyleImageLayers::LayerType layer_type);
+
+// Clean up pointer-based coordinates
+void Gecko_ResetStyleCoord(nsStyleUnit* unit, nsStyleUnion* value);
+
+// Set an nsStyleCoord to a computed `calc()` value
+void Gecko_SetStyleCoordCalcValue(nsStyleUnit* unit, nsStyleUnion* value, nsStyleCoord::CalcValue calc);
+
+void Gecko_CopyClipPathValueFrom(mozilla::StyleClipPath* dst, const mozilla::StyleClipPath* src);
+
+void Gecko_DestroyClipPath(mozilla::StyleClipPath* clip);
+mozilla::StyleBasicShape* Gecko_NewBasicShape(mozilla::StyleBasicShapeType type);
+
+void Gecko_ResetFilters(nsStyleEffects* effects, size_t new_len);
+void Gecko_CopyFiltersFrom(nsStyleEffects* aSrc, nsStyleEffects* aDest);
+
+void Gecko_FillAllBackgroundLists(nsStyleImageLayers* layers, uint32_t max_len);
+void Gecko_FillAllMaskLists(nsStyleImageLayers* layers, uint32_t max_len);
+NS_DECL_THREADSAFE_FFI_REFCOUNTING(nsStyleCoord::Calc, Calc);
+
+nsCSSShadowArray* Gecko_NewCSSShadowArray(uint32_t len);
+NS_DECL_THREADSAFE_FFI_REFCOUNTING(nsCSSShadowArray, CSSShadowArray);
+
+nsStyleQuoteValues* Gecko_NewStyleQuoteValues(uint32_t len);
+NS_DECL_THREADSAFE_FFI_REFCOUNTING(nsStyleQuoteValues, QuoteValues);
+
+nsCSSValueSharedList* Gecko_NewCSSValueSharedList(uint32_t len);
+void Gecko_CSSValue_SetAbsoluteLength(nsCSSValueBorrowedMut css_value, nscoord len);
+void Gecko_CSSValue_SetNumber(nsCSSValueBorrowedMut css_value, float number);
+void Gecko_CSSValue_SetKeyword(nsCSSValueBorrowedMut css_value, nsCSSKeyword keyword);
+void Gecko_CSSValue_SetPercentage(nsCSSValueBorrowedMut css_value, float percent);
+void Gecko_CSSValue_SetAngle(nsCSSValueBorrowedMut css_value, float radians);
+void Gecko_CSSValue_SetCalc(nsCSSValueBorrowedMut css_value, nsStyleCoord::CalcValue calc);
+void Gecko_CSSValue_SetFunction(nsCSSValueBorrowedMut css_value, int32_t len);
+nsCSSValueBorrowedMut Gecko_CSSValue_GetArrayItem(nsCSSValueBorrowedMut css_value, int32_t index);
+NS_DECL_THREADSAFE_FFI_REFCOUNTING(nsCSSValueSharedList, CSSValueSharedList);
+
+// Style-struct management.
+#define STYLE_STRUCT(name, checkdata_cb)                                       \
+  void Gecko_Construct_nsStyle##name(nsStyle##name* ptr);                      \
+  void Gecko_CopyConstruct_nsStyle##name(nsStyle##name* ptr,                   \
+                                         const nsStyle##name* other);          \
+  void Gecko_Destroy_nsStyle##name(nsStyle##name* ptr);
+#include "nsStyleStructList.h"
+#undef STYLE_STRUCT
+
+#define SERVO_BINDING_FUNC(name_, return_, ...) return_ name_(__VA_ARGS__);
+#include "mozilla/ServoBindingList.h"
+#undef SERVO_BINDING_FUNC
+
+} // extern "C"
+
+#endif // mozilla_ServoBindings_h