ABP/Android V8 integration code

jni/wrap.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 <math.h>
+#include <android/log.h>
+#include <jni.h>
+#include <v8.h>
+
+jobject NewBoolean(JNIEnv *pEnv, jboolean value)
+{
+  static jclass cls = reinterpret_cast<jclass>(pEnv->NewGlobalRef(pEnv->FindClass("java/lang/Boolean")));
+  static jmethodID cid = pEnv->GetMethodID(cls, "<init>", "(Z)V");
+  return pEnv->NewObject(cls, cid, value);
+}
+
+jobject NewInt(JNIEnv *pEnv, jint value)
+{
+  static jclass cls = reinterpret_cast<jclass>(pEnv->NewGlobalRef(pEnv->FindClass("java/lang/Integer")));
+  static jmethodID cid = pEnv->GetMethodID(cls, "<init>", "(I)V");
+  return pEnv->NewObject(cls, cid, value);
+}
+
+jobject NewLong(JNIEnv *pEnv, jlong value)
+{
+  static jclass cls = reinterpret_cast<jclass>(pEnv->NewGlobalRef(pEnv->FindClass("java/lang/Long")));
+  static jmethodID cid = pEnv->GetMethodID(cls, "<init>", "(J)V");
+  return pEnv->NewObject(cls, cid, value);
+}
+
+jobject NewDouble(JNIEnv *pEnv, jdouble value)
+{
+  static jclass cls = reinterpret_cast<jclass>(pEnv->NewGlobalRef(pEnv->FindClass("java/lang/Double")));
+  static jmethodID cid = pEnv->GetMethodID(cls, "<init>", "(D)V");
+  return pEnv->NewObject(cls, cid, value);
+}
+
+jstring NewString(JNIEnv *pEnv, v8::Handle<v8::String> str)
+{
+  return pEnv->NewStringUTF(*v8::String::Utf8Value(str));
+}
+
+jobject NewDate(JNIEnv *pEnv, v8::Handle<v8::Date> date)
+{
+  static jclass cls = reinterpret_cast<jclass>(pEnv->NewGlobalRef(pEnv->FindClass("java/lang/Double")));
+  static jmethodID cid = pEnv->GetMethodID(cls, "<init>", "(J)V");
+  jlong value = floor(date->NumberValue());
+  return pEnv->NewObject(cls, cid, value);
+}
+
+jobject wrapJSObject(JNIEnv *pEnv, v8::Handle<v8::Value> value)
+{
+  v8::HandleScope handle_scope;
+
+  if (value.IsEmpty() || value->IsNull() || value->IsUndefined()) return NULL;
+  if (value->IsTrue()) return NewBoolean(pEnv, JNI_TRUE);
+  if (value->IsFalse()) return NewBoolean(pEnv, JNI_FALSE);
+
+  if (value->IsInt32()) return NewInt(pEnv, value->Int32Value());
+  if (value->IsUint32()) return NewLong(pEnv, value->IntegerValue());
+  if (value->IsString()) return NewString(pEnv, v8::Handle<v8::String>::Cast(value));
+  if (value->IsDate()) return NewDate(pEnv, v8::Handle<v8::Date>::Cast(value));
+  if (value->IsNumber()) return NewDouble(pEnv, value->NumberValue());
+
+//  return wrap(value->ToObject());
+  return NULL;
+}
+
+v8::Handle<v8::Value> wrapJavaObject(JNIEnv *pEnv, jobject value)
+{
+  v8::HandleScope handle_scope;
+  v8::TryCatch try_catch;
+
+  if (value == NULL)
+    return handle_scope.Close(v8::Null());
+
+  v8::Handle<v8::Value> result;
+
+  jclass cls = pEnv->GetObjectClass(value);
+
+  if (pEnv->IsAssignableFrom(cls, pEnv->FindClass("java/lang/String")) == JNI_TRUE)
+  {
+    jstring str = (jstring) value;
+    const char *p = pEnv->GetStringUTFChars(str, NULL);
+
+    result = v8::String::New(p, pEnv->GetStringUTFLength(str));
+
+    pEnv->ReleaseStringUTFChars(str, p);
+  }
+  else if (pEnv->IsAssignableFrom(cls, pEnv->FindClass("java/lang/Long")) == JNI_TRUE
+      || pEnv->IsAssignableFrom(cls, pEnv->FindClass("java/lang/Integer")) == JNI_TRUE
+      || pEnv->IsAssignableFrom(cls, pEnv->FindClass("java/lang/Short")) == JNI_TRUE
+      || pEnv->IsAssignableFrom(cls, pEnv->FindClass("java/lang/Byte")) == JNI_TRUE)
+  {
+    static jmethodID mid = pEnv->GetMethodID(pEnv->FindClass("java/lang/Number"), "intValue", "()I");
+
+    result = v8::Integer::New(pEnv->CallIntMethod(value, mid));
+  }
+  else if (pEnv->IsAssignableFrom(cls, pEnv->FindClass("java/lang/Double")) == JNI_TRUE
+      || pEnv->IsAssignableFrom(cls, pEnv->FindClass("java/lang/Float")) == JNI_TRUE)
+  {
+    static jmethodID mid = pEnv->GetMethodID(pEnv->FindClass("java/lang/Number"), "doubleValue", "()D");
+
+    result = v8::Number::New(pEnv->CallDoubleMethod(value, mid));
+  }
+  else if (pEnv->IsAssignableFrom(cls, pEnv->FindClass("java/lang/Boolean")) == JNI_TRUE)
+  {
+    static jmethodID mid = pEnv->GetMethodID(pEnv->FindClass("java/lang/Boolean"), "booleanValue", "()Z");
+
+    result = v8::Boolean::New(pEnv->CallBooleanMethod(value, mid));
+  }
+  else if (pEnv->IsAssignableFrom(cls, pEnv->FindClass("java/util/Date")) == JNI_TRUE)
+  {
+    static jmethodID mid = pEnv->GetMethodID(pEnv->FindClass("java/util/Date"), "getTime", "()J");
+
+    result = v8::Date::New(pEnv->CallLongMethod(value, mid));
+  }
+  /*
+   else if (pEnv->IsAssignableFrom(cls, pEnv->FindClass("java/lang/reflect/Method")) == JNI_TRUE)
+   {
+   result = jni::CJavaFunction::Wrap(pEnv, value);
+   }
+   */
+  else
+  {
+    static jmethodID mid = pEnv->GetMethodID(pEnv->FindClass("java/lang/Class"), "isArray", "()Z");
+
+    if (pEnv->CallBooleanMethod(pEnv->GetObjectClass(value), mid))
+    {
+      size_t len = pEnv->GetArrayLength((jarray) value);
+      v8::Handle<v8::Array> items = v8::Array::New(len);
+
+      for (size_t i=0; i<len; i++)
+      {
+        jobject item = pEnv->GetObjectArrayElement((jobjectArray) value, i);
+        items->Set(i, wrapJavaObject(pEnv, item));
+        pEnv->DeleteLocalRef(item);
+      }
+
+      result = items;
+    }
+  }
+
+  return try_catch.HasCaught() ? v8::Handle<v8::Value>() : handle_scope.Close(result);
+//  return ThrowIf(try_catch) ? v8::Handle<v8::Value>() : handle_scope.Close(result);
+}