android content shell bringup.

content/browser/android/content_view_impl.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/browser/android/content_view_impl.h"
+
+#include "base/android/jni_android.h"
+#include "base/android/scoped_java_ref.h"
+// Once the TODO(jrg) for namespaces in jni generation is resolved
+// (below), we won't need the next two headers.
+#include "base/basictypes.h"
+#include "base/logging.h"
+
+// TODO(jrg): content_view_jni.h is generated by
+// base/android/jni_generator/jni_generator.py from ContentView.java.
+// But the script doesn't know about the content namespace.  Fix gyp
+// rules to define a namespace variable; fix jni_generator.gypi to
+// pass namespace to the script; fix the script to apply namespace on
+// generation.
+// Until that is done, we must wrap this in the content namespace,
+// since otherwise the class ContentView is referenced in the
+// generated header without the proper namespace.  b/6597416
+namespace content {
+#include "jni/content_view_jni.h"
+};
+
+using base::android::GetClass;
+using base::android::HasField;
+
+namespace {
+jfieldID g_native_content_view;
+}  // namespace
+
+
+namespace content {
+
+// ----------------------------------------------------------------------------
+// Implementation of static ContentView public interfaces
+
+ContentView* ContentView::Create(JNIEnv* env, jobject obj) {
+  return new ContentViewImpl(env, obj);
+}
+
+ContentView* ContentView::GetNativeContentView(JNIEnv* env, jobject obj) {
+  return reinterpret_cast<ContentView*>(
+      env->GetIntField(obj, g_native_content_view));
+}
+
+// ----------------------------------------------------------------------------
+
+ContentViewImpl::ContentViewImpl(JNIEnv* env, jobject obj) {
+}
+
+ContentViewImpl::~ContentViewImpl() {
+}
+
+void ContentViewImpl::Destroy(JNIEnv* env, jobject obj) {
+  delete this;
+}
+
+void ContentViewImpl::Observe(int type,
+                              const NotificationSource& source,
+                              const NotificationDetails& details) {
+  // TODO(jrg)
+}
+
+// ----------------------------------------------------------------------------
+// Native JNI methods
+// ----------------------------------------------------------------------------
+
+// This is called for each ContentView.
+// TODO(jrg): add extra args (e.g. hardware_accelerated,
+// native_web_contents) once other pieces are upstreamed.
+static jint Init(JNIEnv* env, jobject obj) {
+  ContentView* view = ContentView::Create(env, obj);
+  return reinterpret_cast<jint>(view);
+}
+
+// ----------------------------------------------------------------------------
+
+bool RegisterContentView(JNIEnv* env) {
+  if (!base::android::HasClass(env, kContentViewClassPath)) {
+    DLOG(ERROR) << "Unable to find class ContentView!";
+    return false;
+  }
+  ScopedJavaLocalRef<jclass> clazz = GetClass(env, kContentViewClassPath);
+  if (!HasField(env, clazz, "mNativeContentView", "I")) {
+    DLOG(ERROR) << "Unable to find ContentView.mNativeContentView!";
+    return false;
+  }
+  g_native_content_view = GetFieldID(env, clazz, "mNativeContentView", "I");
+
+  return RegisterNativesImpl(env) >= 0;
+}
+
+};  // namespace content