michael@0: /* -*-  Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "ctypes.h"
michael@0: #include "jsapi.h"
michael@0: #include "mozilla/ModuleUtils.h"
michael@0: #include "nsMemory.h"
michael@0: #include "nsString.h"
michael@0: #include "nsNativeCharsetUtils.h"
michael@0: #include "mozilla/Preferences.h"
michael@0: #include "mozJSComponentLoader.h"
michael@0: #include "nsZipArchive.h"
michael@0: 
michael@0: #define JSCTYPES_CONTRACTID \
michael@0:   "@mozilla.org/jsctypes;1"
michael@0: 
michael@0: 
michael@0: #define JSCTYPES_CID \
michael@0: { 0xc797702, 0x1c60, 0x4051, { 0x9d, 0xd7, 0x4d, 0x74, 0x5, 0x60, 0x56, 0x42 } }
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace ctypes {
michael@0: 
michael@0: static char*
michael@0: UnicodeToNative(JSContext *cx, const jschar *source, size_t slen)
michael@0: {
michael@0:   nsAutoCString native;
michael@0:   nsDependentString unicode(reinterpret_cast<const char16_t*>(source), slen);
michael@0:   nsresult rv = NS_CopyUnicodeToNative(unicode, native);
michael@0:   if (NS_FAILED(rv)) {
michael@0:     JS_ReportError(cx, "could not convert string to native charset");
michael@0:     return nullptr;
michael@0:   }
michael@0: 
michael@0:   char* result = static_cast<char*>(JS_malloc(cx, native.Length() + 1));
michael@0:   if (!result)
michael@0:     return nullptr;
michael@0: 
michael@0:   memcpy(result, native.get(), native.Length() + 1);
michael@0:   return result;
michael@0: }
michael@0: 
michael@0: static JSCTypesCallbacks sCallbacks = {
michael@0:   UnicodeToNative
michael@0: };
michael@0: 
michael@0: NS_GENERIC_FACTORY_CONSTRUCTOR(Module)
michael@0: 
michael@0: NS_IMPL_ISUPPORTS(Module, nsIXPCScriptable)
michael@0: 
michael@0: Module::Module()
michael@0: {
michael@0: }
michael@0: 
michael@0: Module::~Module()
michael@0: {
michael@0: }
michael@0: 
michael@0: #define XPC_MAP_CLASSNAME Module
michael@0: #define XPC_MAP_QUOTED_CLASSNAME "Module"
michael@0: #define XPC_MAP_WANT_CALL
michael@0: #define XPC_MAP_FLAGS nsIXPCScriptable::WANT_CALL
michael@0: #include "xpc_map_end.h"
michael@0: 
michael@0: static bool
michael@0: SealObjectAndPrototype(JSContext* cx, JS::Handle<JSObject *> parent, const char* name)
michael@0: {
michael@0:   JS::Rooted<JS::Value> prop(cx);
michael@0:   if (!JS_GetProperty(cx, parent, name, &prop))
michael@0:     return false;
michael@0: 
michael@0:   if (prop.isUndefined()) {
michael@0:     // Pretend we sealed the object.
michael@0:     return true;
michael@0:   }
michael@0: 
michael@0:   JS::Rooted<JSObject*> obj(cx, prop.toObjectOrNull());
michael@0:   if (!JS_GetProperty(cx, obj, "prototype", &prop))
michael@0:     return false;
michael@0: 
michael@0:   JS::Rooted<JSObject*> prototype(cx, prop.toObjectOrNull());
michael@0:   return JS_FreezeObject(cx, obj) && JS_FreezeObject(cx, prototype);
michael@0: }
michael@0: 
michael@0: static bool
michael@0: InitAndSealCTypesClass(JSContext* cx, JS::Handle<JSObject*> global)
michael@0: {
michael@0:   // Init the ctypes object.
michael@0:   if (!JS_InitCTypesClass(cx, global))
michael@0:     return false;
michael@0: 
michael@0:   // Set callbacks for charset conversion and such.
michael@0:   JS::Rooted<JS::Value> ctypes(cx);
michael@0:   if (!JS_GetProperty(cx, global, "ctypes", &ctypes))
michael@0:     return false;
michael@0: 
michael@0:   JS_SetCTypesCallbacks(JSVAL_TO_OBJECT(ctypes), &sCallbacks);
michael@0: 
michael@0:   // Seal up Object, Function, Array and Error and their prototypes.  (This
michael@0:   // single object instance is shared amongst everyone who imports the ctypes
michael@0:   // module.)
michael@0:   if (!SealObjectAndPrototype(cx, global, "Object") ||
michael@0:       !SealObjectAndPrototype(cx, global, "Function") ||
michael@0:       !SealObjectAndPrototype(cx, global, "Array") ||
michael@0:       !SealObjectAndPrototype(cx, global, "Error"))
michael@0:     return false;
michael@0: 
michael@0:   // Finally, seal the global object, for good measure. (But not recursively;
michael@0:   // this breaks things.)
michael@0:   return JS_FreezeObject(cx, global);
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: Module::Call(nsIXPConnectWrappedNative* wrapper,
michael@0:              JSContext* cx,
michael@0:              JSObject* obj,
michael@0:              const JS::CallArgs& args,
michael@0:              bool* _retval)
michael@0: {
michael@0:   mozJSComponentLoader* loader = mozJSComponentLoader::Get();
michael@0:   JS::Rooted<JSObject*> targetObj(cx);
michael@0:   nsresult rv = loader->FindTargetObject(cx, &targetObj);
michael@0:   NS_ENSURE_SUCCESS(rv, rv);
michael@0: 
michael@0:   *_retval = InitAndSealCTypesClass(cx, targetObj);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: }
michael@0: }
michael@0: 
michael@0: NS_DEFINE_NAMED_CID(JSCTYPES_CID);
michael@0: 
michael@0: static const mozilla::Module::CIDEntry kCTypesCIDs[] = {
michael@0:   { &kJSCTYPES_CID, false, nullptr, mozilla::ctypes::ModuleConstructor },
michael@0:   { nullptr }
michael@0: };
michael@0: 
michael@0: static const mozilla::Module::ContractIDEntry kCTypesContracts[] = {
michael@0:   { JSCTYPES_CONTRACTID, &kJSCTYPES_CID },
michael@0:   { nullptr }
michael@0: };
michael@0: 
michael@0: static const mozilla::Module kCTypesModule = {
michael@0:   mozilla::Module::kVersion,
michael@0:   kCTypesCIDs,
michael@0:   kCTypesContracts
michael@0: };
michael@0: 
michael@0: NSMODULE_DEFN(jsctypes) = &kCTypesModule;