gecko-dev/dom/bindings/WebIDLGlobalNameHash.h

100 строки
3.6 KiB
C++

/* -*- 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_dom_WebIDLGlobalNameHash_h__
#define mozilla_dom_WebIDLGlobalNameHash_h__
#include "js/RootingAPI.h"
#include "nsTArray.h"
#include "mozilla/dom/BindingDeclarations.h"
class JSFlatString;
namespace mozilla {
namespace dom {
namespace constructors {
namespace id {
enum ID : uint16_t;
} // namespace id
} // namespace constructors
struct WebIDLNameTableEntry {
// Check whether a constructor should be enabled for the given object.
// Note that the object should NOT be an Xray, since Xrays will end up
// defining constructors on the underlying object.
typedef bool (*ConstructorEnabled)(JSContext* cx, JS::Handle<JSObject*> obj);
uint16_t mNameOffset;
uint16_t mNameLength;
constructors::id::ID mConstructorId;
CreateInterfaceObjectsMethod mCreate;
// May be null if enabled unconditionally
ConstructorEnabled mEnabled;
};
class WebIDLGlobalNameHash {
public:
typedef WebIDLNameTableEntry::ConstructorEnabled ConstructorEnabled;
// Returns false if something failed. aFound is set to true if the name is in
// the hash, whether it's enabled or not.
static bool DefineIfEnabled(JSContext* aCx, JS::Handle<JSObject*> aObj,
JS::Handle<jsid> aId,
JS::MutableHandle<JS::PropertyDescriptor> aDesc,
bool* aFound);
static bool MayResolve(jsid aId);
// The type of names we're asking for.
enum NameType {
// All WebIDL names enabled for aObj.
AllNames,
// Only the names that are enabled for aObj and have not been resolved for
// aObj in the past (and therefore can't have been deleted).
UnresolvedNamesOnly
};
// Returns false if an exception has been thrown on aCx.
static bool GetNames(JSContext* aCx, JS::Handle<JSObject*> aObj,
NameType aNameType, JS::AutoIdVector& aNames);
// Helpers for resolving & enumerating names on the system global.
// NOTE: These are distinct as it currently lacks a ProtoAndIfaceCache, and is
// an XPCOM global.
static bool ResolveForSystemGlobal(JSContext* aCx, JS::Handle<JSObject*> aObj,
JS::Handle<jsid> aId, bool* aResolvedp);
static bool NewEnumerateSystemGlobal(JSContext* aCx,
JS::Handle<JSObject*> aObj,
JS::AutoIdVector& aProperties,
bool aEnumerableOnly);
private:
friend struct WebIDLNameTableEntry;
// Look up an entry by key name. `nullptr` if the entry was not found.
// The impl of GetEntry is generated by Codegen.py in RegisterBindings.cpp
static const WebIDLNameTableEntry* GetEntry(JSFlatString* aKey);
// The total number of names in the hash.
// The value of sCount is generated by Codegen.py in RegisterBindings.cpp.
static const uint32_t sCount;
// The name table entries in the hash.
// The value of sEntries is generated by Codegen.py in RegisterBindings.cpp.
static const WebIDLNameTableEntry sEntries[];
// The names registered in the hash, concatenated as one big string with \0
// as a separator between names.
// The value of sNames is generated by Codegen.py in RegisterBindings.cpp.
static const char sNames[];
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_WebIDLGlobalNameHash_h__