зеркало из https://github.com/mozilla/gecko-dev.git
155 строки
3.9 KiB
C++
155 строки
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "ctypes.h"
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#include "jsapi.h"
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#include "mozilla/ModuleUtils.h"
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#include "nsMemory.h"
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#include "nsString.h"
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#include "nsNativeCharsetUtils.h"
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#include "mozilla/Preferences.h"
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#include "mozJSComponentLoader.h"
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#define JSCTYPES_CONTRACTID \
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"@mozilla.org/jsctypes;1"
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#define JSCTYPES_CID \
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{ 0xc797702, 0x1c60, 0x4051, { 0x9d, 0xd7, 0x4d, 0x74, 0x5, 0x60, 0x56, 0x42 } }
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namespace mozilla {
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namespace ctypes {
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static char*
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UnicodeToNative(JSContext *cx, const jschar *source, size_t slen)
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{
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nsAutoCString native;
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nsDependentString unicode(reinterpret_cast<const PRUnichar*>(source), slen);
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nsresult rv = NS_CopyUnicodeToNative(unicode, native);
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if (NS_FAILED(rv)) {
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JS_ReportError(cx, "could not convert string to native charset");
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return NULL;
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}
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char* result = static_cast<char*>(JS_malloc(cx, native.Length() + 1));
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if (!result)
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return NULL;
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memcpy(result, native.get(), native.Length() + 1);
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return result;
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}
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static JSCTypesCallbacks sCallbacks = {
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UnicodeToNative
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};
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NS_GENERIC_FACTORY_CONSTRUCTOR(Module)
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NS_IMPL_ISUPPORTS1(Module, nsIXPCScriptable)
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Module::Module()
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{
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}
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Module::~Module()
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{
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}
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#define XPC_MAP_CLASSNAME Module
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#define XPC_MAP_QUOTED_CLASSNAME "Module"
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#define XPC_MAP_WANT_CALL
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#define XPC_MAP_FLAGS nsIXPCScriptable::WANT_CALL
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#include "xpc_map_end.h"
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static JSBool
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SealObjectAndPrototype(JSContext* cx, JSObject* parent, const char* name)
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{
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JS::Value prop;
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if (!JS_GetProperty(cx, parent, name, &prop))
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return false;
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if (prop.isUndefined()) {
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// Pretend we sealed the object.
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return true;
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}
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JSObject* obj = JSVAL_TO_OBJECT(prop);
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if (!JS_GetProperty(cx, obj, "prototype", &prop))
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return false;
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JSObject* prototype = JSVAL_TO_OBJECT(prop);
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return JS_FreezeObject(cx, obj) && JS_FreezeObject(cx, prototype);
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}
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static JSBool
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InitAndSealCTypesClass(JSContext* cx, JSObject* global)
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{
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// Init the ctypes object.
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if (!JS_InitCTypesClass(cx, global))
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return false;
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// Set callbacks for charset conversion and such.
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JS::Value ctypes;
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if (!JS_GetProperty(cx, global, "ctypes", &ctypes))
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return false;
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JS_SetCTypesCallbacks(JSVAL_TO_OBJECT(ctypes), &sCallbacks);
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// Seal up Object, Function, Array and Error and their prototypes. (This
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// single object instance is shared amongst everyone who imports the ctypes
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// module.)
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if (!SealObjectAndPrototype(cx, global, "Object") ||
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!SealObjectAndPrototype(cx, global, "Function") ||
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!SealObjectAndPrototype(cx, global, "Array") ||
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!SealObjectAndPrototype(cx, global, "Error"))
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return false;
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// Finally, seal the global object, for good measure. (But not recursively;
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// this breaks things.)
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return JS_FreezeObject(cx, global);
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}
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NS_IMETHODIMP
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Module::Call(nsIXPConnectWrappedNative* wrapper,
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JSContext* cx,
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JSObject* obj,
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uint32_t argc,
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JS::Value* argv,
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JS::Value* vp,
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bool* _retval)
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{
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JSObject* targetObj = nullptr;
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mozJSComponentLoader* loader = mozJSComponentLoader::Get();
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nsresult rv = loader->FindTargetObject(cx, &targetObj);
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NS_ENSURE_SUCCESS(rv, rv);
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*_retval = InitAndSealCTypesClass(cx, targetObj);
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return NS_OK;
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}
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}
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}
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NS_DEFINE_NAMED_CID(JSCTYPES_CID);
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static const mozilla::Module::CIDEntry kCTypesCIDs[] = {
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{ &kJSCTYPES_CID, false, NULL, mozilla::ctypes::ModuleConstructor },
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{ NULL }
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};
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static const mozilla::Module::ContractIDEntry kCTypesContracts[] = {
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{ JSCTYPES_CONTRACTID, &kJSCTYPES_CID },
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{ NULL }
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};
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static const mozilla::Module kCTypesModule = {
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mozilla::Module::kVersion,
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kCTypesCIDs,
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kCTypesContracts
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};
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NSMODULE_DEFN(jsctypes) = &kCTypesModule;
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