ABP/Android V8 integration code

jni/jsEngine.cpp

+/*
+ * This file is part of the Adblock Plus,
+ * Copyright (C) 2006-2012 Eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string>
+#include <android/log.h>
+#include <jni.h>
+#include "wrap.h"
+#include "ops.h"
+
+const char* scriptDir;
+const char* dataDir;
+JNIEnv* jniEnv;
+jobject jniCallback;
+
+extern "C"
+{
+  JNIEXPORT jlong JNICALL Java_org_adblockplus_android_JSEngine_nativeInitialize(JNIEnv *pEnv, jobject, jobject pCallback);
+  JNIEXPORT void JNICALL Java_org_adblockplus_android_JSEngine_nativeRelease(JNIEnv *pEnv, jobject pObj, jlong pContext);
+  JNIEXPORT jobject JNICALL Java_org_adblockplus_android_JSEngine_nativeExecute(JNIEnv *pEnv, jobject pObj, jstring pScript, jlong pContext);
+  JNIEXPORT jobject JNICALL Java_org_adblockplus_android_JSEngine_nativeGet(JNIEnv *pEnv, jobject pObj, jstring pKey, jlong pContext);
+  JNIEXPORT jobject JNICALL Java_org_adblockplus_android_JSEngine_nativePut(JNIEnv *pEnv, jobject pObj, jstring pKey, jobject pValue, jlong pContext);
+  JNIEXPORT void JNICALL Java_org_adblockplus_android_JSEngine_nativeCallback(JNIEnv *pEnv, jobject pObj, jlong pCallback, jobjectArray pParams, jlong pContext);
+  JNIEXPORT jlong JNICALL Java_org_adblockplus_android_JSEngine_nativeRunCallbacks(JNIEnv *pEnv, jobject pObj, jlong pContext);
+};
+
+typedef struct __ObjMethod
+{
+  const char* name;
+  v8::InvocationCallback callback;
+} ObjMethod;
+
+static ObjMethod methods[] =
+{
+{ "load", loadImpl },
+{ "print", printImpl },
+{ "showToast", showToastImpl },
+{ "canAutoupdate", canAutoupdateImpl },
+{ "setStatus", setStatusImpl },
+{ "fileExists", fileExistsImpl },
+{ "fileLastModified", fileLastModifiedImpl },
+{ "fileRemove", fileRemoveImpl },
+{ "fileRename", fileRenameImpl },
+{ "fileRead", fileReadImpl },
+{ "fileWrite", fileWriteImpl },
+{ "setTimeout", setTimeoutImpl },
+{ "httpSend", httpSendImpl },
+{ NULL, NULL }, };
+
+void reportException(v8::TryCatch* try_catch)
+{
+  v8::HandleScope handle_scope;
+  v8::String::Utf8Value exception(try_catch->Exception());
+  v8::Handle < v8::Message > message = try_catch->Message();
+  if (message.IsEmpty())
+  {
+    // Exception context is unknown
+    __android_log_print(ANDROID_LOG_ERROR, "JS", "Uncaught exception: %s", *exception);
+  }
+  else
+  {
+    v8::String::Utf8Value filename(message->GetScriptResourceName());
+    int linenum = message->GetLineNumber();
+    __android_log_print(ANDROID_LOG_ERROR, "JS", "Uncaught exception in %s:%i: %s\n", *filename, linenum, *exception);
+
+    v8::String::Utf8Value sourceLine(message->GetSourceLine());
+    if (*sourceLine)
+    {
+      fprintf(stderr, "\n%s\n", *sourceLine);
+
+      int startcol = message->GetStartColumn();
+      int endcol = message->GetEndColumn();
+      for (int i = 0; i < startcol; i++)
+        fprintf(stderr, " ");
+      for (int i = startcol; i < endcol; i++)
+        fprintf(stderr, "^");
+      fprintf(stderr, "\n");
+    }
+  }
+}
+
+const std::string getString(JNIEnv *pEnv, jstring str)
+{
+  jboolean iscopy;
+
+  const char *s = pEnv->GetStringUTFChars(str, &iscopy);
+  jsize len = pEnv->GetStringUTFLength(str);
+
+  const std::string value(s, len);
+
+  pEnv->ReleaseStringUTFChars(str, s);
+
+  return value;
+}
+
+jint JNICALL JNI_OnLoad(JavaVM *vm, void *reserved)
+{
+  return JNI_VERSION_1_2;
+}
+
+void JNICALL JNI_OnUnload(JavaVM *vm, void *reserved)
+{
+}
+
+JNIEXPORT jlong JNICALL Java_org_adblockplus_android_JSEngine_nativeInitialize
+  (JNIEnv *pEnv, jobject, jobject pCallback)
+{
+  jniEnv = pEnv;
+  jniCallback = pEnv->NewGlobalRef(pCallback);
+
+  v8::HandleScope handle_scope;
+
+  v8::Handle < v8::ObjectTemplate > system = v8::ObjectTemplate::New();
+  for (int i = 0; methods[i].name; i++)
+    system->Set(v8::String::New(methods[i].name), v8::FunctionTemplate::New(methods[i].callback));
+
+  v8::Handle < v8::ObjectTemplate > global = v8::ObjectTemplate::New();
+  global->Set(v8::String::New("Android"), system);
+
+  return (jlong) *v8::Persistent<v8::Context>::New(v8::Context::New(NULL, global));
+}
+
+JNIEXPORT void JNICALL Java_org_adblockplus_android_JSEngine_nativeRelease
+  (JNIEnv *pEnv, jobject, jlong pContext)
+{
+  ClearQueue();
+  if (pContext)
+  {
+    v8::Persistent<v8::Context> context((v8::Context *) pContext);
+    context.Dispose();
+  }
+  jniCallback = NULL;
+  jniEnv = NULL;
+}
+
+JNIEXPORT jobject JNICALL Java_org_adblockplus_android_JSEngine_nativeExecute
+  (JNIEnv *pEnv, jobject pObj, jstring pScript, jlong pContext)
+{
+  v8::HandleScope handle_scope;
+
+  v8::Persistent<v8::Context> context((v8::Context *) pContext);
+  v8::Context::Scope context_scope(context);
+
+  const std::string script = getString(pEnv, pScript);
+
+  v8::Handle<v8::String> source = v8::String::New(script.c_str(), script.size());
+  v8::Handle<v8::Script> compiledScript = v8::Script::Compile(source);
+  {
+    v8::TryCatch try_catch;
+    v8::Handle<v8::Value> result = compiledScript->Run();
+    if (try_catch.HasCaught())
+    {
+      reportException(&try_catch);
+      return NULL;
+    }
+    else
+    {
+      return wrapJSObject(pEnv, result);
+    }
+  }
+}
+
+JNIEXPORT jobject JNICALL Java_org_adblockplus_android_JSEngine_nativeGet
+  (JNIEnv *pEnv, jobject pObj, jstring pKey, jlong pContext)
+{
+  v8::HandleScope handle_scope;
+
+  v8::Persistent<v8::Context> context((v8::Context *) pContext);
+  v8::Context::Scope context_scope(context);
+
+  v8::Persistent<v8::Object> obj(v8::Persistent<v8::Object>::New(context->Global()));
+  const std::string key = getString(pEnv, pKey);
+
+  {
+    v8::TryCatch try_catch;
+    v8::Handle<v8::Value> value = obj->Get(v8::String::New(key.c_str(), key.size()));
+    if (try_catch.HasCaught())
+    {
+      reportException(&try_catch);
+      return NULL;
+    }
+    else
+    {
+      return wrapJSObject(pEnv, value);
+    }
+  }
+}
+
+JNIEXPORT jobject JNICALL Java_org_adblockplus_android_JSEngine_nativePut
+  (JNIEnv *pEnv, jobject pObj, jstring pKey, jobject pValue, jlong pContext)
+{
+  v8::HandleScope handle_scope;
+
+  v8::Persistent<v8::Context> context((v8::Context *) pContext);
+  v8::Context::Scope context_scope(context);
+
+  v8::Persistent<v8::Object> obj(v8::Persistent<v8::Object>::New(context->Global()));
+
+  const std::string key = getString(pEnv, pKey);
+  v8::Handle<v8::String> name = v8::String::New(key.c_str(), key.size());
+
+//  v8::Handle<v8::Value> value = obj->Get(name);
+  obj->Set(name, wrapJavaObject(pEnv, pValue));
+
+  return NULL;
+//  return env.HasCaught() ? NULL : env.Wrap(value);
+}
+
+JNIEXPORT void JNICALL Java_org_adblockplus_android_JSEngine_nativeCallback
+  (JNIEnv *pEnv, jobject pObj, jlong pCallback, jobjectArray pParams, jlong pContext)
+{
+  v8::HandleScope handle_scope;
+
+  v8::Persistent<v8::Context> context((v8::Context *) pContext);
+  v8::Context::Scope context_scope(context);
+
+  v8::Persistent<v8::Function> callback((v8::Function *) pCallback);
+
+  jsize pnum = pEnv->GetArrayLength(pParams);
+  v8::Handle<v8::Value> *args = new v8::Handle<v8::Value>[pnum];
+
+  for (int i = 0; i < pnum; i++)
+  {
+    jobject param = pEnv->GetObjectArrayElement(pParams, i);
+    args[i] = wrapJavaObject(pEnv, param);
+    pEnv->DeleteLocalRef(param);
+  }
+
+  {
+    v8::TryCatch try_catch;
+    callback->Call(context->Global(), pnum, args);
+    callback.Dispose();
+    delete [] args;
+    if (try_catch.HasCaught())
+      reportException(&try_catch);
+  }
+}
+
+JNIEXPORT jlong JNICALL Java_org_adblockplus_android_JSEngine_nativeRunCallbacks
+  (JNIEnv *pEnv, jobject pObj, jlong pContext)
+{
+  v8::HandleScope handle_scope;
+
+  v8::Persistent<v8::Context> context((v8::Context *) pContext);
+  v8::Context::Scope context_scope(context);
+
+  long r = 0;
+  while (r == 0)
+  {
+    v8::TryCatch try_catch;
+    r = RunNextCallback(context);
+    if (try_catch.HasCaught())
+      reportException(&try_catch);
+  }
+  return (jlong) r;
+}