Add ContentViewDelegate

chrome/browser/android/content_view_delegate.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 "chrome/browser/android/content_view_delegate.h"
+
+#include "base/android/jni_helper.h"
+#include "base/android/jni_string.h"
+#include "base/hash_tables.h"
+#include "base/memory/linked_ptr.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/synchronization/lock.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_contents_observer.h"
+
+#include "jni/content_view_delegate_jni.h"
+
+using namespace base::android;
+using content::BrowserThread;
+using content::RenderViewHost;
+using content::WebContents;
+
+#if defined(COMPILER_GCC)
+namespace BASE_HASH_NAMESPACE {
+
+template<>
+struct hash<content::WebContents*> {
+  size_t operator()(content::WebContents* value) const {
+    return hash<void*>()(static_cast<void*>(value));
+  }
+};
+
+template<>
+struct hash<content::RenderViewHost*> {
+  size_t operator()(content::RenderViewHost* value) const {
+    return hash<void*>()(static_cast<void*>(value));
+  }
+};
+
+} // namespace BASE_HASH_NAMESPACE
+#endif
+
+namespace {
+
+typedef linked_ptr<JavaObjectWeakGlobalRef> LinkedJavaWeakRef;
+typedef base::hash_map<RenderViewHost*, WebContents*>
+    RenderViewHostToWebContentsMapType;
+typedef std::map<WebContents*, LinkedJavaWeakRef>
+    WebContentsToWeakClientMapType;
+
+base::Lock g_map_lock;
+RenderViewHostToWebContentsMapType g_rvh_to_web_contents_map;
+WebContentsToWeakClientMapType g_web_contents_to_weak_client_map;
+
+} // namespace
+
+// WebContentsObserver --------------------------------------------------------
+
+class ContentViewDelegate::WebContentsObserver
+  : public content::WebContentsObserver {
+ public:
+  WebContentsObserver(JNIEnv* env, jobject jobject, WebContents* web_contents);
+
+  virtual void RenderViewCreated(RenderViewHost* render_view_host) OVERRIDE;
+  virtual void RenderViewForInterstitialPageCreated(
+      RenderViewHost* render_view_host) OVERRIDE;
+  virtual void RenderViewDeleted(RenderViewHost* render_view_host) OVERRIDE;
+  virtual void WebContentsDestroyed(WebContents* web_contents);
+};
+
+ContentViewDelegate::WebContentsObserver::WebContentsObserver(
+    JNIEnv* env, jobject jobject, WebContents* web_contents)
+    : content::WebContentsObserver(web_contents) {
+  DCHECK(web_contents);
+  DCHECK(jobject);
+  LinkedJavaWeakRef linked_weak_ref = LinkedJavaWeakRef(
+      new JavaObjectWeakGlobalRef(env, jobject));
+  base::AutoLock lock(g_map_lock);
+  g_web_contents_to_weak_client_map[web_contents] = linked_weak_ref;
+}
+
+void ContentViewDelegate::WebContentsObserver::RenderViewCreated(
+    RenderViewHost* rvh) {
+  DCHECK(rvh);
+  DCHECK(web_contents());
+  base::AutoLock lock(g_map_lock);
+  g_rvh_to_web_contents_map[rvh] = web_contents();
+}
+
+void
+ContentViewDelegate::WebContentsObserver::RenderViewForInterstitialPageCreated(
+      RenderViewHost* rvh) {
+  RenderViewCreated(rvh);
+}
+
+void ContentViewDelegate::WebContentsObserver::RenderViewDeleted(
+    RenderViewHost* rvh) {
+  DCHECK(rvh);
+  base::AutoLock lock(g_map_lock);
+  g_rvh_to_web_contents_map.erase(rvh);
+}
+
+void ContentViewDelegate::WebContentsObserver::WebContentsDestroyed(
+    WebContents* web_contents) {
+  scoped_ptr<ContentViewDelegate> content_view_delegate =
+      ContentViewDelegate::ForWebContents(web_contents);
+  if (content_view_delegate.get())
+    content_view_delegate->OnWebContentsDestroyed();
+  {
+  base::AutoLock lock(g_map_lock);
+  g_web_contents_to_weak_client_map.erase(web_contents);
+  }
+  delete this;
+}
+
+// ContentViewDelegate --------------------------------------------------------
+
+// JNI Methods ----------------------------------------------------------------
+
+void Init(JNIEnv* env, jobject obj,
+          jint native_web_contents) {
+  WebContents* web_contents =
+      reinterpret_cast<WebContents*>(native_web_contents);
+  // The observer's lifespan is tied to that of the WebContents.
+  new ContentViewDelegate::WebContentsObserver(env, obj, web_contents);
+}
+
+bool ContentViewDelegate::RegisterContentViewDelegate(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+// Static methods -------------------------------------------------------------
+
+scoped_ptr<ContentViewDelegate>
+ContentViewDelegate::ForRenderViewHost(RenderViewHost* rvh) {
+  DCHECK(rvh);
+  WebContents* web_contents = NULL;
+  {
+  base::AutoLock lock(g_map_lock);
+  RenderViewHostToWebContentsMapType::iterator web_contents_iterator =
+      g_rvh_to_web_contents_map.find(rvh);
+  if (web_contents_iterator != g_rvh_to_web_contents_map.end())
+    web_contents = web_contents_iterator->second;
+  }
+  if (web_contents == NULL)
+    return scoped_ptr<ContentViewDelegate>();
+  return ForWebContents(web_contents).Pass();
+}
+
+scoped_ptr<ContentViewDelegate>
+ContentViewDelegate::ForWebContents(WebContents* web_contents) {
+  DCHECK(web_contents);
+  base::AutoLock lock(g_map_lock);
+  WebContentsToWeakClientMapType::iterator weak_client_iterator =
+      g_web_contents_to_weak_client_map.find(web_contents);
+  if (weak_client_iterator == g_web_contents_to_weak_client_map.end())
+    return scoped_ptr<ContentViewDelegate>();
+
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> java_client =
+      weak_client_iterator->second->get(env);
+  if (!java_client.obj())
+    return scoped_ptr<ContentViewDelegate>();
+
+  return scoped_ptr<ContentViewDelegate>();
+//  return scoped_ptr<ContentViewDelegate>(
+//      new ContentViewDelegate(env, jobject));
+}
+
+// regular methods ------------------------------------------------------------
+
+ContentViewDelegate::ContentViewDelegate(JNIEnv* env, jobject obj) {
+  java_object_.Reset(env, obj);
+}
+
+ContentViewDelegate::~ContentViewDelegate() {
+}
+
+void ContentViewDelegate::OnWebContentsDestroyed() {
+  JNIEnv* env = AttachCurrentThread();
+  Java_ContentViewDelegate_onWebContentsDestroyed(env, java_object_.obj());
+}
+
+bool ContentViewDelegate::ShouldIgnoreNavigation(
+    RenderViewHost* source,
+    const GURL& validated_url,
+    const content::Referrer& referrer,
+    bool is_content_initiated) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jstring> jstring_url =
+      ConvertUTF8ToJavaString(env, validated_url.spec());
+  bool ret = Java_ContentViewDelegate_shouldOverrideUrlLoading(
+      env, java_object_.obj(), jstring_url.obj());
+  return ret;
+}
+
+bool ContentViewDelegate::ShouldInterceptRequest(
+    const net::URLRequest* request) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  return false;
+}