content/renderer/java/gin_java_bridge_dispatcher.cc

   1 // Copyright 2014 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/renderer/java/gin_java_bridge_dispatcher.h"
   6
   7 #include "base/auto_reset.h"
   8 #include "base/strings/string_number_conversions.h"
   9 #include "base/strings/utf_string_conversions.h"
  10 #include "content/common/gin_java_bridge_messages.h"
  11 #include "content/public/renderer/render_frame.h"
  12 #include "content/renderer/java/gin_java_bridge_object.h"
  13 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  14 #include "third_party/WebKit/public/web/WebView.h"
  15
  16 namespace content {
  17
  18 GinJavaBridgeDispatcher::GinJavaBridgeDispatcher(RenderFrame* render_frame)
  19     : RenderFrameObserver(render_frame),
  20       inside_did_clear_window_object_(false) {
  21 }
  22
  23 GinJavaBridgeDispatcher::~GinJavaBridgeDispatcher() {
  24 }
  25
  26 bool GinJavaBridgeDispatcher::OnMessageReceived(const IPC::Message& msg) {
  27   bool handled = true;
  28   IPC_BEGIN_MESSAGE_MAP(GinJavaBridgeDispatcher, msg)
  29     IPC_MESSAGE_HANDLER(GinJavaBridgeMsg_AddNamedObject, OnAddNamedObject)
  30     IPC_MESSAGE_HANDLER(GinJavaBridgeMsg_RemoveNamedObject, OnRemoveNamedObject)
  31     IPC_MESSAGE_UNHANDLED(handled = false)
  32   IPC_END_MESSAGE_MAP()
  33   return handled;
  34 }
  35
  36 void GinJavaBridgeDispatcher::DidClearWindowObject() {
  37   // Accessing window object when adding properties to it may trigger
  38   // a nested call to DidClearWindowObject.
  39   if (inside_did_clear_window_object_)
  40     return;
  41   base::AutoReset<bool> flag_entry(&inside_did_clear_window_object_, true);
  42   for (NamedObjectMap::const_iterator iter = named_objects_.begin();
  43        iter != named_objects_.end(); ++iter) {
  44     // Always create a new GinJavaBridgeObject, so we don't pull any of the V8
  45     // wrapper's custom properties into the context of the page we have
  46     // navigated to. The old GinJavaBridgeObject will be automatically
  47     // deleted after its wrapper will be collected.
  48     // On the browser side, we ignore wrapper deletion events for named objects,
  49     // as they are only removed upon embedder's request (RemoveNamedObject).
  50     if (objects_.Lookup(iter->second))
  51       objects_.Remove(iter->second);
  52     GinJavaBridgeObject* object = GinJavaBridgeObject::InjectNamed(
  53         render_frame()->GetWebFrame(), AsWeakPtr(), iter->first, iter->second);
  54     if (object) {
  55       objects_.AddWithID(object, iter->second);
  56     } else {
  57       // Inform the host about wrapper creation failure.
  58       render_frame()->Send(new GinJavaBridgeHostMsg_ObjectWrapperDeleted(
  59           routing_id(), iter->second));
  60     }
  61   }
  62 }
  63
  64 void GinJavaBridgeDispatcher::OnAddNamedObject(
  65     const std::string& name,
  66     ObjectID object_id) {
  67   // Added objects only become available after page reload, so here they
  68   // are only added into the internal map.
  69   named_objects_.insert(std::make_pair(name, object_id));
  70 }
  71
  72 void GinJavaBridgeDispatcher::OnRemoveNamedObject(const std::string& name) {
  73   // Removal becomes in effect on next reload. We simply removing the entry
  74   // from the map here.
  75   NamedObjectMap::iterator iter = named_objects_.find(name);
  76   DCHECK(iter != named_objects_.end());
  77   named_objects_.erase(iter);
  78 }
  79
  80 void GinJavaBridgeDispatcher::GetJavaMethods(
  81     ObjectID object_id,
  82     std::set<std::string>* methods) {
  83   render_frame()->Send(new GinJavaBridgeHostMsg_GetMethods(
  84       routing_id(), object_id, methods));
  85 }
  86
  87 bool GinJavaBridgeDispatcher::HasJavaMethod(ObjectID object_id,
  88                                             const std::string& method_name) {
  89   bool result;
  90   render_frame()->Send(new GinJavaBridgeHostMsg_HasMethod(
  91       routing_id(), object_id, method_name, &result));
  92   return result;
  93 }
  94
  95 scoped_ptr<base::Value> GinJavaBridgeDispatcher::InvokeJavaMethod(
  96     ObjectID object_id,
  97     const std::string& method_name,
  98     const base::ListValue& arguments,
  99     GinJavaBridgeError* error) {
 100   base::ListValue result_wrapper;
 101   render_frame()->Send(
 102       new GinJavaBridgeHostMsg_InvokeMethod(routing_id(),
 103                                             object_id,
 104                                             method_name,
 105                                             arguments,
 106                                             &result_wrapper,
 107                                             error));
 108   base::Value* result;
 109   if (result_wrapper.Get(0, &result)) {
 110     return scoped_ptr<base::Value>(result->DeepCopy());
 111   } else {
 112     return scoped_ptr<base::Value>();
 113   }
 114 }
 115
 116 GinJavaBridgeObject* GinJavaBridgeDispatcher::GetObject(ObjectID object_id) {
 117   GinJavaBridgeObject* result = objects_.Lookup(object_id);
 118   if (!result) {
 119     result = GinJavaBridgeObject::InjectAnonymous(AsWeakPtr(), object_id);
 120     if (result)
 121       objects_.AddWithID(result, object_id);
 122   }
 123   return result;
 124 }
 125
 126 void GinJavaBridgeDispatcher::OnGinJavaBridgeObjectDeleted(
 127     GinJavaBridgeObject* object) {
 128   int object_id = object->object_id();
 129   // Ignore cleaning up of old object wrappers.
 130   if (objects_.Lookup(object_id) != object) return;
 131   objects_.Remove(object_id);
 132   render_frame()->Send(
 133       new GinJavaBridgeHostMsg_ObjectWrapperDeleted(routing_id(), object_id));
 134 }
 135
 136 }  // namespace content