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author | Allan Sandfeld Jensen <allan.jensen@qt.io> | 2018-05-15 10:20:33 +0200 |
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committer | Allan Sandfeld Jensen <allan.jensen@qt.io> | 2018-05-15 10:28:57 +0000 |
commit | d17ea114e5ef69ad5d5d7413280a13e6428098aa (patch) | |
tree | 2c01a75df69f30d27b1432467cfe7c1467a498da /chromium/third_party/blink/renderer/platform/bindings/wrapper_type_info.h | |
parent | 8c5c43c7b138c9b4b0bf56d946e61d3bbc111bec (diff) | |
download | qtwebengine-chromium-d17ea114e5ef69ad5d5d7413280a13e6428098aa.tar.gz |
BASELINE: Update Chromium to 67.0.3396.47
Change-Id: Idcb1341782e417561a2473eeecc82642dafda5b7
Reviewed-by: Michal Klocek <michal.klocek@qt.io>
Diffstat (limited to 'chromium/third_party/blink/renderer/platform/bindings/wrapper_type_info.h')
-rw-r--r-- | chromium/third_party/blink/renderer/platform/bindings/wrapper_type_info.h | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/platform/bindings/wrapper_type_info.h b/chromium/third_party/blink/renderer/platform/bindings/wrapper_type_info.h new file mode 100644 index 00000000000..201bf7ad516 --- /dev/null +++ b/chromium/third_party/blink/renderer/platform/bindings/wrapper_type_info.h @@ -0,0 +1,203 @@ +/* + * Copyright (C) 2010 Google Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_WRAPPER_TYPE_INFO_H_ +#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_WRAPPER_TYPE_INFO_H_ + +#include "gin/public/wrapper_info.h" +#include "third_party/blink/renderer/platform/bindings/active_script_wrappable_base.h" +#include "third_party/blink/renderer/platform/heap/handle.h" +#include "third_party/blink/renderer/platform/wtf/allocator.h" +#include "third_party/blink/renderer/platform/wtf/assertions.h" +#include "v8/include/v8.h" + +namespace blink { + +class DOMWrapperWorld; +class ScriptWrappable; + +ScriptWrappable* ToScriptWrappable( + const v8::PersistentBase<v8::Object>& wrapper); +ScriptWrappable* ToScriptWrappable(v8::Local<v8::Object> wrapper); + +static const int kV8DOMWrapperTypeIndex = + static_cast<int>(gin::kWrapperInfoIndex); +static const int kV8DOMWrapperObjectIndex = + static_cast<int>(gin::kEncodedValueIndex); +static const int kV8DefaultWrapperInternalFieldCount = + static_cast<int>(gin::kNumberOfInternalFields); +static const int kV8PrototypeTypeIndex = 0; +static const int kV8PrototypeInternalFieldcount = 1; + +typedef v8::Local<v8::FunctionTemplate> ( + *DomTemplateFunction)(v8::Isolate*, const DOMWrapperWorld&); +typedef ActiveScriptWrappableBase* (*ToActiveScriptWrappableFunction)( + v8::Local<v8::Object>); +typedef void (*ResolveWrapperReachabilityFunction)( + v8::Isolate*, + ScriptWrappable*, + const v8::Persistent<v8::Object>&); +typedef void (*InstallConditionalFeaturesFunction)( + v8::Local<v8::Context>, + const DOMWrapperWorld&, + v8::Local<v8::Object>, + v8::Local<v8::Object>, + v8::Local<v8::Function>, + v8::Local<v8::FunctionTemplate>); + +// This struct provides a way to store a bunch of information that is helpful +// when unwrapping v8 objects. Each v8 bindings class has exactly one static +// WrapperTypeInfo member, so comparing pointers is a safe way to determine if +// types match. +struct WrapperTypeInfo { + DISALLOW_NEW(); + + enum WrapperTypePrototype { + kWrapperTypeObjectPrototype, + kWrapperTypeNoPrototype, // For legacy callback interface + }; + + enum WrapperClassId { + kNodeClassId = 1, // NodeClassId must be smaller than ObjectClassId. + kObjectClassId, + }; + + enum ActiveScriptWrappableInheritance { + kNotInheritFromActiveScriptWrappable, + kInheritFromActiveScriptWrappable, + }; + + static const WrapperTypeInfo* Unwrap(v8::Local<v8::Value> type_info_wrapper) { + return reinterpret_cast<const WrapperTypeInfo*>( + v8::External::Cast(*type_info_wrapper)->Value()); + } + + static void WrapperCreated() { + ThreadState::Current()->Heap().HeapStats().IncreaseWrapperCount(1); + } + + static void WrapperDestroyed() { + ThreadHeapStats& heap_stats = ThreadState::Current()->Heap().HeapStats(); + heap_stats.DecreaseWrapperCount(1); + heap_stats.IncreaseCollectedWrapperCount(1); + } + + bool Equals(const WrapperTypeInfo* that) const { return this == that; } + + bool IsSubclass(const WrapperTypeInfo* that) const { + for (const WrapperTypeInfo* current = this; current; + current = current->parent_class) { + if (current == that) + return true; + } + + return false; + } + + void ConfigureWrapper(v8::PersistentBase<v8::Object>* wrapper) const { + wrapper->SetWrapperClassId(wrapper_class_id); + } + + v8::Local<v8::FunctionTemplate> domTemplate( + v8::Isolate* isolate, + const DOMWrapperWorld& world) const { + return dom_template_function(isolate, world); + } + + void InstallConditionalFeatures( + v8::Local<v8::Context> context, + const DOMWrapperWorld& world, + v8::Local<v8::Object> instance_object, + v8::Local<v8::Object> prototype_object, + v8::Local<v8::Function> interface_object, + v8::Local<v8::FunctionTemplate> interface_template) const { + if (install_conditional_features_function) { + install_conditional_features_function(context, world, instance_object, + prototype_object, interface_object, + interface_template); + } + } + + bool IsActiveScriptWrappable() const { + return active_script_wrappable_inheritance == + kInheritFromActiveScriptWrappable; + } + + // This field must be the first member of the struct WrapperTypeInfo. + // See also static_assert() in .cpp file. + const gin::GinEmbedder gin_embedder; + + DomTemplateFunction dom_template_function; + InstallConditionalFeaturesFunction install_conditional_features_function; + const char* const interface_name; + const WrapperTypeInfo* parent_class; + const unsigned wrapper_type_prototype : 2; // WrapperTypePrototype + const unsigned wrapper_class_id : 2; // WrapperClassId + const unsigned // ActiveScriptWrappableInheritance + active_script_wrappable_inheritance : 1; +}; + +template <typename T, int offset> +inline T* GetInternalField(const v8::PersistentBase<v8::Object>& persistent) { + DCHECK_LT(offset, v8::Object::InternalFieldCount(persistent)); + return reinterpret_cast<T*>( + v8::Object::GetAlignedPointerFromInternalField(persistent, offset)); +} + +template <typename T, int offset> +inline T* GetInternalField(v8::Local<v8::Object> wrapper) { + DCHECK_LT(offset, wrapper->InternalFieldCount()); + return reinterpret_cast<T*>( + wrapper->GetAlignedPointerFromInternalField(offset)); +} + +// The return value can be null if |wrapper| is a global proxy, which points to +// nothing while a navigation. +inline ScriptWrappable* ToScriptWrappable( + const v8::PersistentBase<v8::Object>& wrapper) { + return GetInternalField<ScriptWrappable, kV8DOMWrapperObjectIndex>(wrapper); +} + +inline ScriptWrappable* ToScriptWrappable(v8::Local<v8::Object> wrapper) { + return GetInternalField<ScriptWrappable, kV8DOMWrapperObjectIndex>(wrapper); +} + +inline const WrapperTypeInfo* ToWrapperTypeInfo( + const v8::PersistentBase<v8::Object>& wrapper) { + return GetInternalField<WrapperTypeInfo, kV8DOMWrapperTypeIndex>(wrapper); +} + +inline const WrapperTypeInfo* ToWrapperTypeInfo(v8::Local<v8::Object> wrapper) { + return GetInternalField<WrapperTypeInfo, kV8DOMWrapperTypeIndex>(wrapper); +} + +} // namespace blink + +#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_BINDINGS_WRAPPER_TYPE_INFO_H_ |