layout/style/ServoBindings.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 Gecko to call into Servo */
   8
   9 #ifndef mozilla_ServoBindings_h
  10 #define mozilla_ServoBindings_h
  11
  12 #include "mozilla/ServoStyleConsts.h"
  13
  14 // These functions are defined via macros in Rust, so cbindgen doesn't see them.
  15
  16 namespace mozilla {
  17
  18 // The clang we use on windows complains about returning StyleStrong<> and
  19 // StyleOwned<>, since the template parameters are incomplete.
  20 //
  21 // But they only contain pointers so it is ok. Also, this warning hilariously
  22 // doesn't exist in GCC.
  23 //
  24 // A solution for this is to explicitly instantiate the template, but duplicate
  25 // instantiations are an error.
  26 //
  27 // https://github.com/eqrion/cbindgen/issues/402 tracks an improvement to
  28 // cbindgen that would allow it to autogenerate the template instantiations on
  29 // its own.
  30 #pragma GCC diagnostic push
  31 #ifdef __clang__
  32 #  pragma GCC diagnostic ignored "-Wreturn-type-c-linkage"
  33 #endif
  34
  35 extern "C" {
  36
  37 #define BASIC_RULE_FUNCS_WITHOUT_GETTER_WITH_PREFIX(type_, prefix_)      \
  38   void Servo_##type_##_Debug(const mozilla::Style##prefix_##type_*,      \
  39                              nsACString* result);                        \
  40   void Servo_##type_##_GetCssText(const mozilla::Style##prefix_##type_*, \
  41                                   nsACString* result);
  42
  43 #define BASIC_RULE_FUNCS_WITHOUT_GETTER_LOCKED(type_) \
  44   BASIC_RULE_FUNCS_WITHOUT_GETTER_WITH_PREFIX(type_, Locked)
  45 #define BASIC_RULE_FUNCS_WITHOUT_GETTER_UNLOCKED(type_) \
  46   BASIC_RULE_FUNCS_WITHOUT_GETTER_WITH_PREFIX(type_, )
  47
  48 #define BASIC_RULE_FUNCS_WITH_PREFIX(type_, prefix_)                        \
  49   StyleStrong<mozilla::Style##prefix_##type_##Rule>                         \
  50       Servo_CssRules_Get##type_##RuleAt(const StyleLockedCssRules* rules,   \
  51                                         uint32_t index, uint32_t* line,     \
  52                                         uint32_t* column);                  \
  53   void Servo_StyleSet_##type_##RuleChanged(                                 \
  54       const StylePerDocumentStyleData*, const Style##prefix_##type_##Rule*, \
  55       const StyleDomStyleSheet*, StyleRuleChangeKind);                      \
  56   BASIC_RULE_FUNCS_WITHOUT_GETTER_WITH_PREFIX(type_##Rule, prefix_)
  57
  58 #define BASIC_RULE_FUNCS_LOCKED(type_) \
  59   BASIC_RULE_FUNCS_WITH_PREFIX(type_, Locked)
  60
  61 #define BASIC_RULE_FUNCS_UNLOCKED(type_) BASIC_RULE_FUNCS_WITH_PREFIX(type_, )
  62
  63 #define GROUP_RULE_FUNCS_WITH_PREFIX(type_, prefix_)                      \
  64   BASIC_RULE_FUNCS_WITH_PREFIX(type_, prefix_)                            \
  65   StyleStrong<mozilla::StyleLockedCssRules> Servo_##type_##Rule_GetRules( \
  66       const mozilla::Style##prefix_##type_##Rule* rule);
  67
  68 #define GROUP_RULE_FUNCS_LOCKED(type_) \
  69   GROUP_RULE_FUNCS_WITH_PREFIX(type_, Locked)
  70
  71 #define GROUP_RULE_FUNCS_UNLOCKED(type_) GROUP_RULE_FUNCS_WITH_PREFIX(type_, )
  72
  73 BASIC_RULE_FUNCS_LOCKED(Style)
  74 BASIC_RULE_FUNCS_LOCKED(Import)
  75 BASIC_RULE_FUNCS_WITHOUT_GETTER_LOCKED(Keyframe)
  76 BASIC_RULE_FUNCS_LOCKED(Keyframes)
  77 GROUP_RULE_FUNCS_UNLOCKED(Media)
  78 GROUP_RULE_FUNCS_UNLOCKED(Document)
  79 BASIC_RULE_FUNCS_UNLOCKED(Namespace)
  80 GROUP_RULE_FUNCS_LOCKED(Page)
  81 BASIC_RULE_FUNCS_UNLOCKED(Property)
  82 GROUP_RULE_FUNCS_UNLOCKED(Supports)
  83 GROUP_RULE_FUNCS_UNLOCKED(LayerBlock)
  84 BASIC_RULE_FUNCS_UNLOCKED(LayerStatement)
  85 BASIC_RULE_FUNCS_UNLOCKED(FontFeatureValues)
  86 BASIC_RULE_FUNCS_UNLOCKED(FontPaletteValues)
  87 BASIC_RULE_FUNCS_LOCKED(FontFace)
  88 BASIC_RULE_FUNCS_LOCKED(CounterStyle)
  89 GROUP_RULE_FUNCS_UNLOCKED(Container)
  90 GROUP_RULE_FUNCS_UNLOCKED(Scope)
  91 GROUP_RULE_FUNCS_UNLOCKED(StartingStyle)
  92
  93 #undef GROUP_RULE_FUNCS_LOCKED
  94 #undef GROUP_RULE_FUNCS_UNLOCKED
  95 #undef GROUP_RULE_FUNCS_WITH_PREFIX
  96 #undef BASIC_RULE_FUNCS_LOCKED
  97 #undef BASIC_RULE_FUNCS_UNLOCKED
  98 #undef BASIC_RULE_FUNCS_WITH_PREFIX
  99 #undef BASIC_RULE_FUNCS_WITHOUT_GETTER_LOCKED
 100 #undef BASIC_RULE_FUNCS_WITHOUT_GETTER_UNLOCKED
 101 #undef BASIC_RULE_FUNCS_WITHOUT_GETTER_WITH_PREFIX
 102
 103 #define BASIC_SERDE_FUNCS(type_)                                            \
 104   bool Servo_##type_##_Deserialize(mozilla::ipc::ByteBuf* input, type_* v); \
 105   bool Servo_##type_##_Serialize(const type_* v, mozilla::ipc::ByteBuf* output);
 106
 107 BASIC_SERDE_FUNCS(LengthPercentage)
 108 BASIC_SERDE_FUNCS(StyleRotate)
 109 BASIC_SERDE_FUNCS(StyleScale)
 110 BASIC_SERDE_FUNCS(StyleTranslate)
 111 BASIC_SERDE_FUNCS(StyleTransform)
 112 BASIC_SERDE_FUNCS(StyleOffsetPath)
 113 BASIC_SERDE_FUNCS(StyleOffsetRotate)
 114 BASIC_SERDE_FUNCS(StylePositionOrAuto)
 115 BASIC_SERDE_FUNCS(StyleOffsetPosition)
 116 BASIC_SERDE_FUNCS(StyleComputedTimingFunction)
 117
 118 #undef BASIC_SERDE_FUNCS
 119
 120 void Servo_CounterStyleRule_GetDescriptorCssText(
 121     const StyleLockedCounterStyleRule* rule, nsCSSCounterDesc desc,
 122     nsACString* result);
 123
 124 bool Servo_CounterStyleRule_SetDescriptor(
 125     const StyleLockedCounterStyleRule* rule, nsCSSCounterDesc desc,
 126     const nsACString* value);
 127
 128 }  // extern "C"
 129
 130 #pragma GCC diagnostic pop
 131
 132 }  // namespace mozilla
 133
 134 #endif  // mozilla_ServoBindings_h