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/strings/string_number_conversions.h"
8 #include "base/strings/utf_string_conversions.h"
9 #include "content/common/gin_java_bridge_messages.h"
10 #include "content/public/renderer/render_frame.h"
11 #include "content/renderer/java/gin_java_bridge_object.h"
12 #include "third_party/WebKit/public/web/WebLocalFrame.h"
13 #include "third_party/WebKit/public/web/WebView.h"
14
15 namespace content {
16
GinJavaBridgeDispatcher(RenderFrame * render_frame)17 GinJavaBridgeDispatcher::GinJavaBridgeDispatcher(RenderFrame* render_frame)
18 : RenderFrameObserver(render_frame),
19 inside_did_clear_window_object_(false) {
20 }
21
~GinJavaBridgeDispatcher()22 GinJavaBridgeDispatcher::~GinJavaBridgeDispatcher() {
23 }
24
OnMessageReceived(const IPC::Message & msg)25 bool GinJavaBridgeDispatcher::OnMessageReceived(const IPC::Message& msg) {
26 bool handled = true;
27 IPC_BEGIN_MESSAGE_MAP(GinJavaBridgeDispatcher, msg)
28 IPC_MESSAGE_HANDLER(GinJavaBridgeMsg_AddNamedObject, OnAddNamedObject)
29 IPC_MESSAGE_HANDLER(GinJavaBridgeMsg_RemoveNamedObject, OnRemoveNamedObject)
30 IPC_MESSAGE_UNHANDLED(handled = false)
31 IPC_END_MESSAGE_MAP()
32 return handled;
33 }
34
35 namespace {
36
37 class ScopedFlag {
38 public:
ScopedFlag(bool * flag)39 ScopedFlag(bool* flag) : flag_(flag) {
40 DCHECK(!*flag_);
41 *flag_ = true;
42 }
~ScopedFlag()43 ~ScopedFlag() {
44 DCHECK(*flag_);
45 *flag_ = false;
46 }
47 private:
48 bool* flag_;
49
50 DISALLOW_COPY_AND_ASSIGN(ScopedFlag);
51 };
52
53 } // namespace
54
DidClearWindowObject()55 void GinJavaBridgeDispatcher::DidClearWindowObject() {
56 // Accessing window object when adding properties to it may trigger
57 // a nested call to DidClearWindowObject.
58 if (inside_did_clear_window_object_)
59 return;
60 ScopedFlag flag(&inside_did_clear_window_object_);
61 for (NamedObjectMap::const_iterator iter = named_objects_.begin();
62 iter != named_objects_.end(); ++iter) {
63 // Always create a new GinJavaBridgeObject, so we don't pull any of the V8
64 // wrapper's custom properties into the context of the page we have
65 // navigated to. The old GinJavaBridgeObject will be automatically
66 // deleted after its wrapper will be collected.
67 // On the browser side, we ignore wrapper deletion events for named objects,
68 // as they are only removed upon embedder's request (RemoveNamedObject).
69 if (objects_.Lookup(iter->second))
70 objects_.Remove(iter->second);
71 GinJavaBridgeObject* object = GinJavaBridgeObject::InjectNamed(
72 render_frame()->GetWebFrame(), AsWeakPtr(), iter->first, iter->second);
73 if (object) {
74 objects_.AddWithID(object, iter->second);
75 } else {
76 // Inform the host about wrapper creation failure.
77 render_frame()->Send(new GinJavaBridgeHostMsg_ObjectWrapperDeleted(
78 routing_id(), iter->second));
79 }
80 }
81 }
82
OnAddNamedObject(const std::string & name,ObjectID object_id)83 void GinJavaBridgeDispatcher::OnAddNamedObject(
84 const std::string& name,
85 ObjectID object_id) {
86 // Added objects only become available after page reload, so here they
87 // are only added into the internal map.
88 named_objects_.insert(std::make_pair(name, object_id));
89 }
90
OnRemoveNamedObject(const std::string & name)91 void GinJavaBridgeDispatcher::OnRemoveNamedObject(const std::string& name) {
92 // Removal becomes in effect on next reload. We simply removing the entry
93 // from the map here.
94 NamedObjectMap::iterator iter = named_objects_.find(name);
95 DCHECK(iter != named_objects_.end());
96 named_objects_.erase(iter);
97 }
98
GetJavaMethods(ObjectID object_id,std::set<std::string> * methods)99 void GinJavaBridgeDispatcher::GetJavaMethods(
100 ObjectID object_id,
101 std::set<std::string>* methods) {
102 render_frame()->Send(new GinJavaBridgeHostMsg_GetMethods(
103 routing_id(), object_id, methods));
104 }
105
HasJavaMethod(ObjectID object_id,const std::string & method_name)106 bool GinJavaBridgeDispatcher::HasJavaMethod(ObjectID object_id,
107 const std::string& method_name) {
108 bool result;
109 render_frame()->Send(new GinJavaBridgeHostMsg_HasMethod(
110 routing_id(), object_id, method_name, &result));
111 return result;
112 }
113
InvokeJavaMethod(ObjectID object_id,const std::string & method_name,const base::ListValue & arguments,GinJavaBridgeError * error)114 scoped_ptr<base::Value> GinJavaBridgeDispatcher::InvokeJavaMethod(
115 ObjectID object_id,
116 const std::string& method_name,
117 const base::ListValue& arguments,
118 GinJavaBridgeError* error) {
119 base::ListValue result_wrapper;
120 render_frame()->Send(
121 new GinJavaBridgeHostMsg_InvokeMethod(routing_id(),
122 object_id,
123 method_name,
124 arguments,
125 &result_wrapper,
126 error));
127 base::Value* result;
128 if (result_wrapper.Get(0, &result)) {
129 return scoped_ptr<base::Value>(result->DeepCopy());
130 } else {
131 return scoped_ptr<base::Value>();
132 }
133 }
134
GetObject(ObjectID object_id)135 GinJavaBridgeObject* GinJavaBridgeDispatcher::GetObject(ObjectID object_id) {
136 GinJavaBridgeObject* result = objects_.Lookup(object_id);
137 if (!result) {
138 result = GinJavaBridgeObject::InjectAnonymous(AsWeakPtr(), object_id);
139 if (result)
140 objects_.AddWithID(result, object_id);
141 }
142 return result;
143 }
144
OnGinJavaBridgeObjectDeleted(ObjectID object_id)145 void GinJavaBridgeDispatcher::OnGinJavaBridgeObjectDeleted(ObjectID object_id) {
146 if (!objects_.Lookup(object_id))
147 return;
148 objects_.Remove(object_id);
149 render_frame()->Send(
150 new GinJavaBridgeHostMsg_ObjectWrapperDeleted(routing_id(), object_id));
151 }
152
153 } // namespace content
154