/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- * * The contents of this file are subject to the Netscape Public * License Version 1.1 (the "License"); you may not use this file * except in compliance with the License. You may obtain a copy of * the License at http://www.mozilla.org/NPL/ * * Software distributed under the License is distributed on an "AS * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr * implied. See the License for the specific language governing * rights and limitations under the License. * * The Original Code is Mozilla Communicator client code, released * March 31, 1998. * * The Initial Developer of the Original Code is Netscape * Communications Corporation. Portions created by Netscape are * Copyright (C) 1998 Netscape Communications Corporation. All * Rights Reserved. * * Contributor(s): * * Alternatively, the contents of this file may be used under the * terms of the GNU Public License (the "GPL"), in which case the * provisions of the GPL are applicable instead of those above. * If you wish to allow use of your version of this file only * under the terms of the GPL and not to allow others to use your * version of this file under the NPL, indicate your decision by * deleting the provisions above and replace them with the notice * and other provisions required by the GPL. If you do not delete * the provisions above, a recipient may use your version of this * file under either the NPL or the GPL. */ /* * This file is part of the Java-vendor-neutral implementation of LiveConnect * * It contains the implementation providing nsIFactory XP-COM interface. * */ #include #include #include "prtypes.h" #include "prprf.h" #include "prlog.h" #include "jsj_private.h" #include "jsjava.h" #include "jscntxt.h" /* For js_ReportErrorAgain(). TODO - get rid of private header */ #include "netscape_javascript_JSObject.h" /* javah-generated headers */ #include "nsISecurityContext.h" #include "nsIServiceManager.h" #include "nsIJSContextStack.h" PR_BEGIN_EXTERN_C /* A captured JavaScript error, created when JS_ReportError() is called while running JavaScript code that is itself called from Java. */ struct CapturedJSError { char * message; JSErrorReport report; /* Line # of error, etc. */ jthrowable java_exception; /* Java exception, error, or null */ CapturedJSError * next; /* Next oldest captured JS error */ }; PR_END_EXTERN_C #include "nsCLiveconnect.h" /***************************************************************************/ // A class to put on the stack to manage JS contexts when we are entering JS. // This pushes and pops the given context // with the nsThreadJSContextStack service as this object goes into and out // of scope. It is optimized to not push/pop the cx if it is already on top // of the stack. We need to push the JSContext when we enter JS because the // JS security manager looks on the context stack for permissions information. class AutoPushJSContext { public: AutoPushJSContext(JSContext *cx) { mContextStack = do_GetService("@mozilla.org/js/xpc/ContextStack;1"); if(mContextStack) { JSContext* currentCX; if(NS_SUCCEEDED(mContextStack->Peek(¤tCX))) { // Is the current context already on the stack? if(cx == currentCX) mContextStack = nsnull; else { mContextStack->Push(cx); // Leave the reference to the mContextStack to // indicate that we need to pop it in our dtor. } } } } ~AutoPushJSContext() { if(mContextStack) { mContextStack->Pop(nsnull); mContextStack = nsnull; } } private: nsCOMPtr mContextStack; }; //////////////////////////////////////////////////////////////////////////// // from nsISupports and AggregatedQueryInterface: // Thes macro expands to the aggregated query interface scheme. NS_IMPL_AGGREGATED(nsCLiveconnect); NS_METHOD nsCLiveconnect::AggregatedQueryInterface(const nsIID& aIID, void** aInstancePtr) { NS_ENSURE_ARG_POINTER(aInstancePtr); if (aIID.Equals(NS_GET_IID(nsISupports))) { *aInstancePtr = GetInner(); } else if (aIID.Equals(NS_GET_IID(nsILiveconnect))) { *aInstancePtr = NS_STATIC_CAST(nsILiveconnect*, this); } else { *aInstancePtr = nsnull; return NS_NOINTERFACE; } NS_ADDREF((nsISupports*) *aInstancePtr); return NS_OK; } //////////////////////////////////////////////////////////////////////////// // from nsILiveconnect: /** * get member of a Native JSObject for a given name. * * @param jEnv - JNIEnv on which the call is being made. * @param obj - A Native JS Object. * @param name - Name of a member. * @param pjobj - return parameter as a java object representing * the member. If it is a basic data type it is converted to * a corresponding java type. If it is a NJSObject, then it is * wrapped up as java wrapper netscape.javascript.JSObject. */ NS_METHOD nsCLiveconnect::GetMember(JNIEnv *jEnv, jsobject obj, const jchar *name, jsize length, void* principalsArray[], int numPrincipals, nsISupports *securitySupports, jobject *pjobj) { if(jEnv == NULL || obj == 0) { return NS_ERROR_FAILURE; } JSJavaThreadState *jsj_env = NULL; JSObjectHandle *handle = (JSObjectHandle*)obj; JSObject *js_obj = handle->js_obj; JSContext *cx = NULL; jobject member = NULL; jsval js_val; int dummy_cost = 0; JSBool dummy_bool = PR_FALSE; JSErrorReporter saved_state = NULL; jsj_env = jsj_enter_js(jEnv, mJavaClient, NULL, &cx, NULL, &saved_state, principalsArray, numPrincipals, securitySupports); if (!jsj_env) return NS_ERROR_FAILURE; AutoPushJSContext autopush(cx); if (!name) { JS_ReportError(cx, "illegal null member name"); member = NULL; goto done; } if (!JS_GetUCProperty(cx, js_obj, name, length, &js_val)) goto done; jsj_ConvertJSValueToJavaObject(cx, jEnv, js_val, jsj_get_jlObject_descriptor(cx, jEnv), &dummy_cost, &member, &dummy_bool); done: if (!jsj_exit_js(cx, jsj_env, saved_state)) return NS_ERROR_FAILURE; *pjobj = member; return NS_OK; } /** * get member of a Native JSObject for a given index. * * @param jEnv - JNIEnv on which the call is being made. * @param obj - A Native JS Object. * @param index - Index of a member. * @param pjobj - return parameter as a java object representing * the member. */ NS_METHOD nsCLiveconnect::GetSlot(JNIEnv *jEnv, jsobject obj, jint slot, void* principalsArray[], int numPrincipals, nsISupports *securitySupports, jobject *pjobj) { if(jEnv == NULL || obj == 0) { return NS_ERROR_FAILURE; } JSJavaThreadState *jsj_env = NULL; JSObjectHandle *handle = (JSObjectHandle*)obj; JSObject *js_obj = handle->js_obj; JSContext *cx = NULL; jobject member = NULL; jsval js_val; int dummy_cost = 0; JSBool dummy_bool = PR_FALSE; JSErrorReporter saved_state = NULL; jsj_env = jsj_enter_js(jEnv, mJavaClient, NULL, &cx, NULL, &saved_state, principalsArray, numPrincipals, securitySupports); if (!jsj_env) return NS_ERROR_FAILURE; AutoPushJSContext autopush(cx); // =-= sudu: check to see if slot can be passed in as is. // Should it be converted to a jsint? if (!JS_GetElement(cx, js_obj, slot, &js_val)) goto done; if (!jsj_ConvertJSValueToJavaObject(cx, jEnv, js_val, jsj_get_jlObject_descriptor(cx, jEnv), &dummy_cost, &member, &dummy_bool)) goto done; done: if (!jsj_exit_js(cx, jsj_env, saved_state)) return NS_ERROR_FAILURE; *pjobj = member; return NS_OK; } /** * set member of a Native JSObject for a given name. * * @param jEnv - JNIEnv on which the call is being made. * @param obj - A Native JS Object. * @param name - Name of a member. * @param jobj - Value to set. If this is a basic data type, it is converted * using standard JNI calls but if it is a wrapper to a JSObject * then a internal mapping is consulted to convert to a NJSObject. */ NS_METHOD nsCLiveconnect::SetMember(JNIEnv *jEnv, jsobject obj, const jchar *name, jsize length, jobject java_obj, void* principalsArray[], int numPrincipals, nsISupports *securitySupports) { if(jEnv == NULL || obj == 0) { return NS_ERROR_FAILURE; } JSJavaThreadState *jsj_env = NULL; JSObjectHandle *handle = (JSObjectHandle*)obj; JSObject *js_obj = handle->js_obj; JSContext *cx = NULL; jsval js_val; JSErrorReporter saved_state = NULL; jsj_env = jsj_enter_js(jEnv, mJavaClient, NULL, &cx, NULL, &saved_state, principalsArray, numPrincipals, securitySupports); if (!jsj_env) return NS_ERROR_FAILURE; AutoPushJSContext autopush(cx); if (!name) { JS_ReportError(cx, "illegal null member name"); goto done; } if (!jsj_ConvertJavaObjectToJSValue(cx, jEnv, java_obj, &js_val)) goto done; JS_SetUCProperty(cx, js_obj, name, length, &js_val); done: jsj_exit_js(cx, jsj_env, saved_state); return NS_OK; } /** * set member of a Native JSObject for a given index. * * @param jEnv - JNIEnv on which the call is being made. * @param obj - A Native JS Object. * @param index - Index of a member. * @param jobj - Value to set. If this is a basic data type, it is converted * using standard JNI calls but if it is a wrapper to a JSObject * then a internal mapping is consulted to convert to a NJSObject. */ NS_METHOD nsCLiveconnect::SetSlot(JNIEnv *jEnv, jsobject obj, jint slot, jobject java_obj, void* principalsArray[], int numPrincipals, nsISupports *securitySupports) { if(jEnv == NULL || obj == 0) { return NS_ERROR_FAILURE; } JSJavaThreadState *jsj_env = NULL; JSObjectHandle *handle = (JSObjectHandle*)obj; JSObject *js_obj = handle->js_obj; JSContext *cx = NULL; jsval js_val; JSErrorReporter saved_state = NULL; jsj_env = jsj_enter_js(jEnv, mJavaClient, NULL, &cx, NULL, &saved_state, principalsArray, numPrincipals, securitySupports); if (!jsj_env) return NS_ERROR_FAILURE; AutoPushJSContext autopush(cx); if (!jsj_ConvertJavaObjectToJSValue(cx, jEnv, java_obj, &js_val)) goto done; JS_SetElement(cx, js_obj, slot, &js_val); done: jsj_exit_js(cx, jsj_env, saved_state); return NS_OK; } /** * remove member of a Native JSObject for a given name. * * @param jEnv - JNIEnv on which the call is being made. * @param obj - A Native JS Object. * @param name - Name of a member. */ NS_METHOD nsCLiveconnect::RemoveMember(JNIEnv *jEnv, jsobject obj, const jchar *name, jsize length, void* principalsArray[], int numPrincipals, nsISupports *securitySupports) { if(jEnv == NULL || obj == 0) { return NS_ERROR_FAILURE; } JSJavaThreadState *jsj_env = NULL; JSObjectHandle *handle = (JSObjectHandle*)obj; JSObject *js_obj = handle->js_obj; JSContext *cx = NULL; jsval js_val; JSErrorReporter saved_state = NULL; jsj_env = jsj_enter_js(jEnv, mJavaClient, NULL, &cx, NULL, &saved_state, principalsArray, numPrincipals, securitySupports); if (!jsj_env) return NS_ERROR_FAILURE; AutoPushJSContext autopush(cx); if (!name) { JS_ReportError(cx, "illegal null member name"); goto done; } JS_DeleteUCProperty2(cx, js_obj, name, length, &js_val); done: jsj_exit_js(cx, jsj_env, saved_state); return NS_OK; } /** * call a method of Native JSObject. * * @param jEnv - JNIEnv on which the call is being made. * @param obj - A Native JS Object. * @param name - Name of a method. * @param jobjArr - Array of jobjects representing parameters of method being caled. * @param pjobj - return value. */ NS_METHOD nsCLiveconnect::Call(JNIEnv *jEnv, jsobject obj, const jchar *name, jsize length, jobjectArray java_args, void* principalsArray[], int numPrincipals, nsISupports *securitySupports, jobject *pjobj) { if(jEnv == NULL || obj == 0) { return NS_ERROR_FAILURE; } int i = 0; int argc = 0; int arg_num = 0; jsval *argv = 0; JSJavaThreadState *jsj_env = NULL; JSObjectHandle *handle = (JSObjectHandle*)obj; JSObject *js_obj = handle->js_obj; JSContext *cx = NULL; jsval js_val; jsval function_val = 0; int dummy_cost = 0; JSBool dummy_bool = PR_FALSE; JSErrorReporter saved_state = NULL; jobject result = NULL; jsj_env = jsj_enter_js(jEnv, mJavaClient, NULL, &cx, NULL, &saved_state, principalsArray, numPrincipals, securitySupports); if (!jsj_env) return NS_ERROR_FAILURE; AutoPushJSContext autopush(cx); result = NULL; if (!name) { JS_ReportError(cx, "illegal null JavaScript function name"); goto done; } /* Allocate space for JS arguments */ if (java_args) { argc = jEnv->GetArrayLength(java_args); argv = (jsval*)JS_malloc(cx, argc * sizeof(jsval)); } else { argc = 0; argv = 0; } /* Convert arguments from Java to JS values */ for (arg_num = 0; arg_num < argc; arg_num++) { jobject arg = jEnv->GetObjectArrayElement(java_args, arg_num); if (!jsj_ConvertJavaObjectToJSValue(cx, jEnv, arg, &argv[arg_num])) goto cleanup_argv; JS_AddRoot(cx, &argv[arg_num]); } if (!JS_GetUCProperty(cx, js_obj, name, length, &function_val)) goto cleanup_argv; if (!JS_CallFunctionValue(cx, js_obj, function_val, argc, argv, &js_val)) goto cleanup_argv; jsj_ConvertJSValueToJavaObject(cx, jEnv, js_val, jsj_get_jlObject_descriptor(cx, jEnv), &dummy_cost, &result, &dummy_bool); cleanup_argv: if (argv) { for (i = 0; i < arg_num; i++) JS_RemoveRoot(cx, &argv[i]); JS_free(cx, argv); } done: if (!jsj_exit_js(cx, jsj_env, saved_state)) return NS_ERROR_FAILURE; *pjobj = result; return NS_OK; } NS_METHOD nsCLiveconnect::Eval(JNIEnv *jEnv, jsobject obj, const jchar *script, jsize length, void* principalsArray[], int numPrincipals, nsISupports *securitySupports, jobject *pjobj) { if(jEnv == NULL || obj == 0) { return NS_ERROR_FAILURE; } JSJavaThreadState *jsj_env = NULL; JSObjectHandle *handle = (JSObjectHandle*)obj; JSObject *js_obj = handle->js_obj; JSContext *cx = NULL; jsval js_val; int dummy_cost = 0; JSBool dummy_bool = PR_FALSE; JSErrorReporter saved_state = NULL; jobject result = NULL; const char *codebase = NULL; JSPrincipals *principals = NULL; JSBool eval_succeeded = PR_FALSE; jsj_env = jsj_enter_js(jEnv, mJavaClient, NULL, &cx, NULL, &saved_state, principalsArray, numPrincipals, securitySupports); if (!jsj_env) return NS_ERROR_FAILURE; AutoPushJSContext autopush(cx); result = NULL; if (!script) { JS_ReportError(cx, "illegal null string eval argument"); goto done; } /* Set up security stuff */ if (JSJ_callbacks && JSJ_callbacks->get_JSPrincipals_from_java_caller) principals = JSJ_callbacks->get_JSPrincipals_from_java_caller(jEnv, cx, principalsArray, numPrincipals, securitySupports); codebase = principals ? principals->codebase : NULL; /* Have the JS engine evaluate the unicode string */ eval_succeeded = JS_EvaluateUCScriptForPrincipals(cx, js_obj, principals, script, length, codebase, 0, &js_val); if (!eval_succeeded) goto done; /* Convert result to a subclass of java.lang.Object */ jsj_ConvertJSValueToJavaObject(cx, jEnv, js_val, jsj_get_jlObject_descriptor(cx, jEnv), &dummy_cost, &result, &dummy_bool); done: if (principals) JSPRINCIPALS_DROP(cx, principals); if (!jsj_exit_js(cx, jsj_env, saved_state)) return NS_ERROR_FAILURE; *pjobj = result; return NS_OK; } /** * Get the window object for a plugin instance. * * @param jEnv - JNIEnv on which the call is being made. * @param pJavaObject - Either a jobject or a pointer to a plugin instance * representing the java object. * @param pjobj - return value. This is a native js object * representing the window object of a frame * in which a applet/bean resides. */ NS_METHOD nsCLiveconnect::GetWindow(JNIEnv *jEnv, void *pJavaObject, void* principalsArray[], int numPrincipals, nsISupports *securitySupports, jsobject *pobj) { if(jEnv == NULL || JSJ_callbacks == NULL) { return NS_ERROR_FAILURE; } // associate this Java client with this LiveConnect connection. mJavaClient = pJavaObject; char *err_msg = NULL; JSContext *cx = NULL; JSObject *js_obj = NULL; JSErrorReporter saved_state = NULL; JSJavaThreadState *jsj_env = NULL; JSObjectHandle *handle = NULL; jsj_env = jsj_enter_js(jEnv, mJavaClient, NULL, &cx, NULL, &saved_state, principalsArray, numPrincipals, securitySupports); if (!jsj_env) return NS_ERROR_FAILURE; AutoPushJSContext autopush(cx); err_msg = NULL; js_obj = JSJ_callbacks->map_java_object_to_js_object(jEnv, mJavaClient, &err_msg); if (!js_obj) { if (err_msg) { JS_ReportError(cx, err_msg); free(err_msg); } goto done; } #ifdef PRESERVE_JSOBJECT_IDENTITY *pobj = (jint)js_obj; #else /* FIXME: to handle PRESERVE_JSOBJECT_IDENTITY case, this needs to just return a raw JSObject reference. FIXME !!! */ /* Create a tiny stub object to act as the GC root that points to the JSObject from its netscape.javascript.JSObject counterpart. */ handle = (JSObjectHandle*)JS_malloc(cx, sizeof(JSObjectHandle)); if (handle != NULL) { handle->js_obj = js_obj; handle->rt = JS_GetRuntime(cx); } *pobj = (jsobject)NS_PTR_TO_INT32(handle); /* FIXME: what if the window is explicitly disposed of, how do we notify Java? */ #endif done: if (!jsj_exit_js(cx, jsj_env, saved_state)) return NS_ERROR_FAILURE; return NS_OK; } /** * Get the window object for a plugin instance. * * @param jEnv - JNIEnv on which the call is being made. * @param obj - A Native JS Object. */ NS_METHOD nsCLiveconnect::FinalizeJSObject(JNIEnv *jEnv, jsobject obj) { if(jEnv == NULL || obj == 0) { return NS_ERROR_FAILURE; } JSObjectHandle *handle = (JSObjectHandle *)obj; if (!handle) return NS_ERROR_NULL_POINTER; JS_RemoveRootRT(handle->rt, &handle->js_obj); free(handle); return NS_OK; } NS_METHOD nsCLiveconnect::ToString(JNIEnv *jEnv, jsobject obj, jstring *pjstring) { if(jEnv == NULL || obj == 0) { return NS_ERROR_FAILURE; } JSJavaThreadState *jsj_env = NULL; JSObjectHandle *handle = (JSObjectHandle*)obj; JSObject *js_obj = handle->js_obj; JSContext *cx = NULL; JSErrorReporter saved_state = NULL; jstring result = NULL; JSString *jsstr = NULL; jsj_env = jsj_enter_js(jEnv, mJavaClient, NULL, &cx, NULL, &saved_state, NULL, 0, NULL ); if (!jsj_env) return NS_ERROR_FAILURE; AutoPushJSContext autopush(cx); result = NULL; jsstr = JS_ValueToString(cx, OBJECT_TO_JSVAL(js_obj)); if (jsstr) result = jsj_ConvertJSStringToJavaString(cx, jEnv, jsstr); if (!result) result = jEnv->NewStringUTF("*JavaObject*"); if (!jsj_exit_js(cx, jsj_env, saved_state)) return NS_ERROR_FAILURE; *pjstring = result; return NS_OK; } //////////////////////////////////////////////////////////////////////////// // from nsCLiveconnect: nsCLiveconnect::nsCLiveconnect(nsISupports *aOuter) : mJavaClient(NULL) { NS_INIT_AGGREGATED(aOuter); #ifdef PRESERVE_JSOBJECT_IDENTITY jsj_init_js_obj_reflections_table(); #endif } nsCLiveconnect::~nsCLiveconnect() { }