Add support for triggering Android intents based on content.

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/jni_string.h"
 #include "base/android/scoped_java_ref.h"
 #include "content/browser/android/content_view_client.h"
 #include "content/browser/web_contents/navigation_controller_impl.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/web_contents.h"
 #include "jni/content_view_jni.h"
 
+using base::android::AttachCurrentThread;
 using base::android::ConvertUTF16ToJavaString;
 using base::android::ConvertUTF8ToJavaString;
 using base::android::GetClass;
 using base::android::HasField;
+using base::android::ScopedJavaLocalRef;
 
 namespace {
 jfieldID g_native_content_view;
 }  // namespace
 
 namespace content {
 
+struct ContentViewImpl::JavaObject {
+  jweak obj;
+
+  ScopedJavaLocalRef<jobject> View(JNIEnv* env) {
+    return GetRealObject(env, obj);
+  }
+};
+
 // ----------------------------------------------------------------------------
 // Implementation of static ContentView public interfaces
 
 ContentView* ContentView::Create(JNIEnv* env, jobject obj,
                                  WebContents* web_contents) {
   return new ContentViewImpl(env, obj, web_contents);
 }
 
 ContentView* ContentView::GetNativeContentView(JNIEnv* env, jobject obj) {
   return reinterpret_cast<ContentView*>(
       env->GetIntField(obj, g_native_content_view));
 }
 
 // ----------------------------------------------------------------------------
 
 ContentViewImpl::ContentViewImpl(JNIEnv* env, jobject obj,
                                  WebContents* web_contents)
     : web_contents_(web_contents),
       tab_crashed_(false) {
   DCHECK(web_contents) <<
       "A ContentViewImpl should be created with a valid WebContents.";
+
+  InitJNI(env, obj);
 }
 
 ContentViewImpl::~ContentViewImpl() {
+  if (java_object_) {
+    JNIEnv* env = AttachCurrentThread();
+    env->DeleteWeakGlobalRef(java_object_->obj);
+    delete java_object_;
+    java_object_ = 0;
+  }
 }
 
 void ContentViewImpl::Destroy(JNIEnv* env, jobject obj) {
   delete this;
 }
 
 void ContentViewImpl::Observe(int type,
                               const NotificationSource& source,
                               const NotificationDetails& details) {
   // TODO(jrg)
 }
 
+void ContentViewImpl::InitJNI(JNIEnv* env, jobject obj) {
+  java_object_ = new JavaObject;
+  java_object_->obj = env->NewWeakGlobalRef(obj);
+}
+
 // ----------------------------------------------------------------------------
 // Methods called from Java via JNI
 // ----------------------------------------------------------------------------
 
 void ContentViewImpl::LoadUrlWithoutUrlSanitization(JNIEnv* env,
                                                     jobject,
                                                     jstring jurl,
                                                     int page_transition) {
   GURL url(base::android::ConvertJavaStringToUTF8(env, jurl));
 
@@ skipping 162 matching lines @@
     int endy,
     base::i18n::TextDirection end_dir) {
   NOTIMPLEMENTED() << "not upstreamed yet";
 }
 
 void ContentViewImpl::OnAcceleratedCompositingStateChange(
     RenderWidgetHostViewAndroid* rwhva, bool activated, bool force) {
   NOTIMPLEMENTED() << "not upstreamed yet";
 }
 
+void ContentViewImpl::StartContentIntent(const GURL& content_url) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> jcontent_url =
+      ConvertUTF8ToJavaString(env, content_url.spec());
+  Java_ContentView_startContentIntent(env,
+                                      java_object_->View(env).obj(),
+                                      jcontent_url.obj());
+}
+
 // --------------------------------------------------------------------------
 // Methods called from Java via JNI
 // --------------------------------------------------------------------------
 
 // --------------------------------------------------------------------------
 // Methods called from native code
 // --------------------------------------------------------------------------
 
 gfx::Rect ContentViewImpl::GetBounds() const {
   NOTIMPLEMENTED() << "not upstreamed yet";
@@ skipping 11 matching lines @@
   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