1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "content/browser/renderer_host/java/java_bridge_dispatcher_host_manager.h" 6 7 #include "base/android/jni_android.h" 8 #include "base/android/jni_helper.h" 9 #include "base/android/scoped_java_ref.h" 10 #include "base/bind.h" 11 #include "base/logging.h" 12 #include "base/strings/utf_string_conversions.h" 13 #include "content/browser/renderer_host/java/java_bound_object.h" 14 #include "content/browser/renderer_host/java/java_bridge_dispatcher_host.h" 15 #include "content/common/android/hash_set.h" 16 #include "content/public/browser/browser_thread.h" 17 #include "third_party/WebKit/public/web/WebBindings.h" 18 19 namespace content { 20 21 JavaBridgeDispatcherHostManager::JavaBridgeDispatcherHostManager( 22 WebContents* web_contents) 23 : WebContentsObserver(web_contents) { 24 } 25 26 JavaBridgeDispatcherHostManager::~JavaBridgeDispatcherHostManager() { 27 for (ObjectMap::iterator iter = objects_.begin(); iter != objects_.end(); 28 ++iter) { 29 WebKit::WebBindings::releaseObject(iter->second); 30 } 31 DCHECK_EQ(0U, instances_.size()); 32 } 33 34 void JavaBridgeDispatcherHostManager::AddNamedObject(const string16& name, 35 NPObject* object) { 36 // Record this object in a map so that we can add it into RenderViewHosts 37 // created later. The JavaBridgeDispatcherHost instances will take a 38 // reference to the object, but we take one too, because this method can be 39 // called before there are any such instances. 40 WebKit::WebBindings::retainObject(object); 41 objects_[name] = object; 42 43 for (InstanceMap::iterator iter = instances_.begin(); 44 iter != instances_.end(); ++iter) { 45 iter->second->AddNamedObject(name, object); 46 } 47 } 48 49 void JavaBridgeDispatcherHostManager::SetRetainedObjectSet( 50 const JavaObjectWeakGlobalRef& retained_object_set) { 51 // It's an error to replace the retained_object_set_ after it's been set, 52 // so we check that it hasn't already been here. 53 // TODO(benm): It'd be better to pass the set in the constructor to avoid 54 // the chance of this happening; but that's tricky as this get's constructed 55 // before ContentViewCore (which owns the set). Best solution may be to move 56 // ownership of the JavaBridgerDispatchHostManager from WebContents to 57 // ContentViewCore? 58 JNIEnv* env = base::android::AttachCurrentThread(); 59 base::android::ScopedJavaLocalRef<jobject> new_retained_object_set = 60 retained_object_set.get(env); 61 base::android::ScopedJavaLocalRef<jobject> current_retained_object_set = 62 retained_object_set_.get(env); 63 if (!env->IsSameObject(new_retained_object_set.obj(), 64 current_retained_object_set.obj())) { 65 DCHECK(current_retained_object_set.is_null()); 66 retained_object_set_ = retained_object_set; 67 } 68 } 69 70 void JavaBridgeDispatcherHostManager::RemoveNamedObject(const string16& name) { 71 ObjectMap::iterator iter = objects_.find(name); 72 if (iter == objects_.end()) { 73 return; 74 } 75 76 WebKit::WebBindings::releaseObject(iter->second); 77 objects_.erase(iter); 78 79 for (InstanceMap::iterator iter = instances_.begin(); 80 iter != instances_.end(); ++iter) { 81 iter->second->RemoveNamedObject(name); 82 } 83 } 84 85 void JavaBridgeDispatcherHostManager::RenderViewCreated( 86 RenderViewHost* render_view_host) { 87 // Creates a JavaBridgeDispatcherHost for the specified RenderViewHost and 88 // adds all currently registered named objects to the new instance. 89 scoped_refptr<JavaBridgeDispatcherHost> instance = 90 new JavaBridgeDispatcherHost(render_view_host); 91 92 for (ObjectMap::const_iterator iter = objects_.begin(); 93 iter != objects_.end(); ++iter) { 94 instance->AddNamedObject(iter->first, iter->second); 95 } 96 97 instances_[render_view_host] = instance; 98 } 99 100 void JavaBridgeDispatcherHostManager::RenderViewDeleted( 101 RenderViewHost* render_view_host) { 102 instances_.erase(render_view_host); 103 } 104 105 void JavaBridgeDispatcherHostManager::WebContentsDestroyed( 106 WebContents* web_contents) { 107 // When a WebContents is shutting down, it clears its observers before 108 // it kills all of its RenderViewHosts, so we won't get a call to 109 // RenderViewDeleted() for all RenderViewHosts. 110 instances_.clear(); 111 } 112 113 void JavaBridgeDispatcherHostManager::DocumentAvailableInMainFrame() { 114 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 115 // Called when the window object has been cleared in the main frame. 116 JNIEnv* env = base::android::AttachCurrentThread(); 117 base::android::ScopedJavaLocalRef<jobject> retained_object_set = 118 retained_object_set_.get(env); 119 if (!retained_object_set.is_null()) { 120 JNI_Java_HashSet_clear(env, retained_object_set); 121 122 // We also need to add back the named objects we have so far as they 123 // should survive navigations. 124 ObjectMap::iterator it = objects_.begin(); 125 for (; it != objects_.end(); ++it) { 126 JNI_Java_HashSet_add(env, retained_object_set, 127 JavaBoundObject::GetJavaObject(it->second)); 128 } 129 } 130 } 131 132 void JavaBridgeDispatcherHostManager::JavaBoundObjectCreated( 133 const base::android::JavaRef<jobject>& object) { 134 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 135 136 JNIEnv* env = base::android::AttachCurrentThread(); 137 base::android::ScopedJavaLocalRef<jobject> retained_object_set = 138 retained_object_set_.get(env); 139 if (!retained_object_set.is_null()) { 140 JNI_Java_HashSet_add(env, retained_object_set, object); 141 } 142 } 143 144 void JavaBridgeDispatcherHostManager::JavaBoundObjectDestroyed( 145 const base::android::JavaRef<jobject>& object) { 146 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI)); 147 148 JNIEnv* env = base::android::AttachCurrentThread(); 149 base::android::ScopedJavaLocalRef<jobject> retained_object_set = 150 retained_object_set_.get(env); 151 if (!retained_object_set.is_null()) { 152 JNI_Java_HashSet_remove(env, retained_object_set, object); 153 } 154 } 155 156 } // namespace content 157
