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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sw=4 et 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_jsipc_JavaScriptShared_h__
#define mozilla_jsipc_JavaScriptShared_h__
#include "jsapi.h"
#include "jspubtd.h"
#include "js/HashTable.h"
#include "mozilla/dom/DOMTypes.h"
#include "mozilla/jsipc/PJavaScript.h"
#include "nsJSUtils.h"
#include "nsFrameMessageManager.h"
namespace mozilla {
namespace jsipc {
typedef uint64_t ObjectId;
// Map ids -> JSObjects
class ObjectStore
{
typedef js::DefaultHasher<ObjectId> TableKeyHasher;
typedef js::HashMap<ObjectId, JSObject *, TableKeyHasher, js::SystemAllocPolicy> ObjectTable;
public:
ObjectStore();
bool init();
void trace(JSTracer *trc);
bool add(ObjectId id, JSObject *obj);
JSObject *find(ObjectId id);
void remove(ObjectId id);
private:
ObjectTable table_;
};
// Map JSObjects -> ids
class ObjectIdCache
{
typedef js::PointerHasher<JSObject *, 3> Hasher;
typedef js::HashMap<JSObject *, ObjectId, Hasher, js::SystemAllocPolicy> ObjectIdTable;
public:
ObjectIdCache();
bool init();
void trace(JSTracer *trc);
bool add(JSObject *, ObjectId id);
ObjectId find(JSObject *obj);
void remove(JSObject *obj);
private:
ObjectIdTable table_;
};
class JavaScriptShared
{
public:
bool init();
static const uint32_t OBJECT_EXTRA_BITS = 1;
static const uint32_t OBJECT_IS_CALLABLE = (1 << 0);
protected:
bool toVariant(JSContext *cx, jsval from, JSVariant *to);
bool toValue(JSContext *cx, const JSVariant &from, JS::MutableHandleValue to);
bool fromDescriptor(JSContext *cx, const JSPropertyDescriptor &desc, PPropertyDescriptor *out);
bool toDescriptor(JSContext *cx, const PPropertyDescriptor &in, JSPropertyDescriptor *out);
bool convertIdToGeckoString(JSContext *cx, JS::HandleId id, nsString *to);
bool convertGeckoStringToId(JSContext *cx, const nsString &from, JS::MutableHandleId id);
bool toValue(JSContext *cx, const JSVariant &from, jsval *to) {
JS::RootedValue v(cx);
if (!toValue(cx, from, &v))
return false;
*to = v;
return true;
}
virtual bool makeId(JSContext *cx, JSObject *obj, ObjectId *idp) = 0;
virtual JSObject *unwrap(JSContext *cx, ObjectId id) = 0;
bool unwrap(JSContext *cx, ObjectId id, JSObject **objp) {
if (!id) {
*objp = NULL;
return true;
}
*objp = unwrap(cx, id);
return !!*objp;
}
static void ConvertID(const nsID &from, JSIID *to);
static void ConvertID(const JSIID &from, nsID *to);
JSObject *findObject(uint32_t objId) {
return objects_.find(objId);
}
protected:
ObjectStore objects_;
};
// Use 47 at most, to be safe, since jsval privates are encoded as doubles.
static const uint64_t MAX_CPOW_IDS = (uint64_t(1) << 47) - 1;
} // namespace jsipc
} // namespace mozilla
#endif
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