mozilla
/
gecko-dev
зеркало из https://github.com/mozilla/gecko-dev.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
gecko-dev/js/ipc/JavaScriptShared.cpp

473 строки
11 KiB
C++
Исходник Ответственный История

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=4 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/. */
#include "JavaScriptShared.h"
#include "jsfriendapi.h"
#include "xpcprivate.h"
using namespace js;
using namespace JS;
using namespace mozilla;
using namespace mozilla::jsipc;
ObjectStore::ObjectStore()
: table_(SystemAllocPolicy())
{
}
bool
ObjectStore::init()
{
return table_.init(32);
}
void
ObjectStore::trace(JSTracer *trc)
{
for (ObjectTable::Range r(table_.all()); !r.empty(); r.popFront()) {
JSObject *obj = r.front().value;
JS_CallObjectTracer(trc, &obj, "ipc-object");
MOZ_ASSERT(obj == r.front().value);
}
}
JSObject *
ObjectStore::find(ObjectId id)
{
ObjectTable::Ptr p = table_.lookup(id);
if (!p)
return NULL;
return p->value;
}
bool
ObjectStore::add(ObjectId id, JSObject *obj)
{
return table_.put(id, obj);
}
void
ObjectStore::remove(ObjectId id)
{
table_.remove(id);
}
ObjectIdCache::ObjectIdCache()
: table_(SystemAllocPolicy())
{
}
bool
ObjectIdCache::init()
{
return table_.init(32);
}
void
ObjectIdCache::trace(JSTracer *trc)
{
for (ObjectIdTable::Range r(table_.all()); !r.empty(); r.popFront()) {
JSObject *obj = r.front().key;
JS_CallObjectTracer(trc, &obj, "ipc-id");
MOZ_ASSERT(obj == r.front().key);
}
}
ObjectId
ObjectIdCache::find(JSObject *obj)
{
ObjectIdTable::Ptr p = table_.lookup(obj);
if (!p)
return 0;
return p->value;
}
bool
ObjectIdCache::add(JSObject *obj, ObjectId id)
{
return table_.put(obj, id);
}
void
ObjectIdCache::remove(JSObject *obj)
{
table_.remove(obj);
}
bool
JavaScriptShared::init()
{
if (!objects_.init())
return false;
return true;
}
bool
JavaScriptShared::convertIdToGeckoString(JSContext *cx, JS::HandleId id, nsString *to)
{
RootedValue idval(cx);
if (!JS_IdToValue(cx, id, idval.address()))
return false;
RootedString str(cx, JS_ValueToString(cx, idval));
if (!str)
return false;
const jschar *chars = JS_GetStringCharsZ(cx, str);
if (!chars)
return false;
*to = chars;
return true;
}
bool
JavaScriptShared::convertGeckoStringToId(JSContext *cx, const nsString &from, JS::MutableHandleId to)
{
RootedString str(cx, JS_NewUCStringCopyN(cx, from.BeginReading(), from.Length()));
if (!str)
return false;
return JS_ValueToId(cx, StringValue(str), to.address());
}
bool
JavaScriptShared::toVariant(JSContext *cx, jsval from, JSVariant *to)
{
switch (JS_TypeOfValue(cx, from)) {
case JSTYPE_VOID:
*to = void_t();
return true;
case JSTYPE_NULL:
{
*to = uint64_t(0);
return true;
}
case JSTYPE_OBJECT:
case JSTYPE_FUNCTION:
{
JSObject *obj = from.toObjectOrNull();
if (!obj) {
JS_ASSERT(from == JSVAL_NULL);
*to = uint64_t(0);
return true;
}
if (xpc_JSObjectIsID(cx, obj)) {
JSIID iid;
const nsID *id = xpc_JSObjectToID(cx, obj);
ConvertID(*id, &iid);
*to = iid;
return true;
}
ObjectId id;
if (!makeId(cx, obj, &id))
return false;
*to = uint64_t(id);
return true;
}
case JSTYPE_STRING:
{
nsDependentJSString dep;
if (!dep.init(cx, from))
return false;
*to = dep;
return true;
}
case JSTYPE_NUMBER:
if (JSVAL_IS_INT(from))
*to = double(from.toInt32());
else
*to = from.toDouble();
return true;
case JSTYPE_BOOLEAN:
*to = from.toBoolean();
return true;
default:
MOZ_ASSERT(false);
return false;
}
}
bool
JavaScriptShared::toValue(JSContext *cx, const JSVariant &from, MutableHandleValue to)
{
switch (from.type()) {
case JSVariant::Tvoid_t:
to.set(UndefinedValue());
return true;
case JSVariant::Tuint64_t:
{
ObjectId id = from.get_uint64_t();
if (id) {
JSObject *obj = unwrap(cx, id);
if (!obj)
return false;
to.set(ObjectValue(*obj));
} else {
to.set(JSVAL_NULL);
}
return true;
}
case JSVariant::Tdouble:
to.set(JS_NumberValue(from.get_double()));
return true;
case JSVariant::Tbool:
to.set(BOOLEAN_TO_JSVAL(from.get_bool()));
return true;
case JSVariant::TnsString:
{
const nsString &old = from.get_nsString();
JSString *str = JS_NewUCStringCopyN(cx, old.BeginReading(), old.Length());
if (!str)
return false;
to.set(StringValue(str));
return true;
}
case JSVariant::TJSIID:
{
nsID iid;
const JSIID &id = from.get_JSIID();
ConvertID(id, &iid);
JSCompartment *compartment = GetContextCompartment(cx);
RootedObject global(cx, JS_GetGlobalForCompartmentOrNull(cx, compartment));
JSObject *obj = xpc_NewIDObject(cx, global, iid);
if (!obj)
return false;
to.set(ObjectValue(*obj));
return true;
}
default:
return false;
}
}
/* static */ void
JavaScriptShared::ConvertID(const nsID &from, JSIID *to)
{
to->m0() = from.m0;
to->m1() = from.m1;
to->m2() = from.m2;
to->m3_0() = from.m3[0];
to->m3_1() = from.m3[1];
to->m3_2() = from.m3[2];
to->m3_3() = from.m3[3];
to->m3_4() = from.m3[4];
to->m3_5() = from.m3[5];
to->m3_6() = from.m3[6];
to->m3_7() = from.m3[7];
}
/* static */ void
JavaScriptShared::ConvertID(const JSIID &from, nsID *to)
{
to->m0 = from.m0();
to->m1 = from.m1();
to->m2 = from.m2();
to->m3[0] = from.m3_0();
to->m3[1] = from.m3_1();
to->m3[2] = from.m3_2();
to->m3[3] = from.m3_3();
to->m3[4] = from.m3_4();
to->m3[5] = from.m3_5();
to->m3[6] = from.m3_6();
to->m3[7] = from.m3_7();
}
static const uint32_t DefaultPropertyOp = 1;
static const uint32_t GetterOnlyPropertyStub = 2;
static const uint32_t UnknownPropertyOp = 3;
bool
JavaScriptShared::fromDescriptor(JSContext *cx, const JSPropertyDescriptor &desc, PPropertyDescriptor *out)
{
out->attrs() = desc.attrs;
out->shortid() = desc.shortid;
if (!toVariant(cx, desc.value, &out->value()))
return false;
if (!makeId(cx, desc.obj, &out->objId()))
return false;
if (!desc.getter) {
out->getter() = 0;
} else if (desc.attrs & JSPROP_GETTER) {
JSObject *getter = JS_FUNC_TO_DATA_PTR(JSObject *, desc.getter);
if (!makeId(cx, getter, &out->getter()))
return false;
} else {
if (desc.getter == JS_PropertyStub)
out->getter() = DefaultPropertyOp;
else
out->getter() = UnknownPropertyOp;
}
if (!desc.setter) {
out->setter() = 0;
} else if (desc.attrs & JSPROP_SETTER) {
JSObject *setter = JS_FUNC_TO_DATA_PTR(JSObject *, desc.setter);
if (!makeId(cx, setter, &out->setter()))
return false;
} else {
if (desc.setter == JS_StrictPropertyStub)
out->setter() = DefaultPropertyOp;
else if (desc.setter == js_GetterOnlyPropertyStub)
out->setter() = GetterOnlyPropertyStub;
else
out->setter() = UnknownPropertyOp;
}
return true;
}
JSBool
UnknownPropertyStub(JSContext *cx, HandleObject obj, HandleId id, MutableHandleValue vp)
{
JS_ReportError(cx, "getter could not be wrapped via CPOWs");
return JS_FALSE;
}
JSBool
UnknownStrictPropertyStub(JSContext *cx, HandleObject obj, HandleId id, JSBool strict, MutableHandleValue vp)
{
JS_ReportError(cx, "setter could not be wrapped via CPOWs");
return JS_FALSE;
}
bool
JavaScriptShared::toDescriptor(JSContext *cx, const PPropertyDescriptor &in, JSPropertyDescriptor *out)
{
out->attrs = in.attrs();
out->shortid = in.shortid();
if (!toValue(cx, in.value(), &out->value))
return false;
if (!unwrap(cx, in.objId(), &out->obj))
return false;
if (!in.getter()) {
out->getter = NULL;
} else if (in.attrs() & JSPROP_GETTER) {
JSObject *getter;
if (!unwrap(cx, in.getter(), &getter))
return false;
out->getter = JS_DATA_TO_FUNC_PTR(JSPropertyOp, getter);
} else {
if (in.getter() == DefaultPropertyOp)
out->getter = JS_PropertyStub;
else
out->getter = UnknownPropertyStub;
}
if (!in.setter()) {
out->setter = NULL;
} else if (in.attrs() & JSPROP_SETTER) {
JSObject *setter;
if (!unwrap(cx, in.setter(), &setter))
return false;
out->setter = JS_DATA_TO_FUNC_PTR(JSStrictPropertyOp, setter);
} else {
if (in.setter() == DefaultPropertyOp)
out->setter = JS_StrictPropertyStub;
else if (in.setter() == GetterOnlyPropertyStub)
out->setter = js_GetterOnlyPropertyStub;
else
out->setter = UnknownStrictPropertyStub;
}
return true;
}
bool
CpowIdHolder::ToObject(JSContext *cx, JSObject **objp)
{
return js_->Unwrap(cx, cpows_, objp);
}
bool
JavaScriptShared::Unwrap(JSContext *cx, const InfallibleTArray<CpowEntry> &aCpows, JSObject **objp)
{
*objp = NULL;
if (!aCpows.Length())
return true;
RootedObject obj(cx, JS_NewObject(cx, NULL, NULL, NULL));
if (!obj)
return false;
RootedValue v(cx);
RootedString str(cx);
for (size_t i = 0; i < aCpows.Length(); i++) {
const nsString &name = aCpows[i].name();
if (!toValue(cx, aCpows[i].value(), &v))
return false;
if (!JS_DefineUCProperty(cx,
obj,
name.BeginReading(),
name.Length(),
v,
NULL,
NULL,
JSPROP_ENUMERATE))
{
return false;
}
}
*objp = obj;
return true;
}
bool
JavaScriptShared::Wrap(JSContext *cx, HandleObject aObj, InfallibleTArray<CpowEntry> *outCpows)
{
if (!aObj)
return true;
AutoIdArray ids(cx, JS_Enumerate(cx, aObj));
if (!ids)
return false;
RootedId id(cx);
RootedValue v(cx);
for (size_t i = 0; i < ids.length(); i++) {
id = ids[i];
nsString str;
if (!convertIdToGeckoString(cx, id, &str))
return false;
if (!JS_GetPropertyById(cx, aObj, id, v.address()))
return false;
JSVariant var;
if (!toVariant(cx, v, &var))
return false;
outCpows->AppendElement(CpowEntry(str, var));
}
return true;
}
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку