extensions/renderer/guest_view/guest_view_internal_custom_bindings.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 "extensions/renderer/guest_view/guest_view_internal_custom_bindings.h"
   6
   7 #include <string>
   8
   9 #include "base/bind.h"
  10 #include "content/public/renderer/render_view.h"
  11 #include "content/public/renderer/v8_value_converter.h"
  12 #include "extensions/common/extension.h"
  13 #include "extensions/common/extension_messages.h"
  14 #include "extensions/renderer/guest_view/extensions_guest_view_container.h"
  15 #include "extensions/renderer/script_context.h"
  16 #include "v8/include/v8.h"
  17
  18 using content::V8ValueConverter;
  19
  20 namespace extensions {
  21
  22 GuestViewInternalCustomBindings::GuestViewInternalCustomBindings(
  23     ScriptContext* context)
  24     : ObjectBackedNativeHandler(context) {
  25   RouteFunction("AttachGuest",
  26                 base::Bind(&GuestViewInternalCustomBindings::AttachGuest,
  27                            base::Unretained(this)));
  28   RouteFunction(
  29       "RegisterDestructionCallback",
  30       base::Bind(&GuestViewInternalCustomBindings::RegisterDestructionCallback,
  31                  base::Unretained(this)));
  32 }
  33
  34 void GuestViewInternalCustomBindings::AttachGuest(
  35     const v8::FunctionCallbackInfo<v8::Value>& args) {
  36   // Allow for an optional callback parameter.
  37   CHECK(args.Length() >= 3 && args.Length() <= 4);
  38   // Element Instance ID.
  39   CHECK(args[0]->IsInt32());
  40   // Guest Instance ID.
  41   CHECK(args[1]->IsInt32());
  42   // Attach Parameters.
  43   CHECK(args[2]->IsObject());
  44   // Optional Callback Function.
  45   CHECK(args.Length() < 4 || args[3]->IsFunction());
  46
  47   int element_instance_id = args[0]->Int32Value();
  48   // An element instance ID uniquely identifies a ExtensionsGuestViewContainer
  49   // within a RenderView.
  50   ExtensionsGuestViewContainer* guest_view_container =
  51       ExtensionsGuestViewContainer::FromID(element_instance_id);
  52
  53   // TODO(fsamuel): Should we be reporting an error if the element instance ID
  54   // is invalid?
  55   if (!guest_view_container)
  56     return;
  57
  58   int guest_instance_id = args[1]->Int32Value();
  59
  60   scoped_ptr<base::DictionaryValue> params;
  61   {
  62     scoped_ptr<V8ValueConverter> converter(V8ValueConverter::create());
  63     scoped_ptr<base::Value> params_as_value(
  64         converter->FromV8Value(args[2], context()->v8_context()));
  65     CHECK(params_as_value->IsType(base::Value::TYPE_DICTIONARY));
  66     params.reset(
  67         static_cast<base::DictionaryValue*>(params_as_value.release()));
  68   }
  69
  70   linked_ptr<ExtensionsGuestViewContainer::Request> request(
  71       new ExtensionsGuestViewContainer::AttachRequest(
  72           guest_view_container,
  73           guest_instance_id,
  74           params.Pass(),
  75           args.Length() == 4 ? args[3].As<v8::Function>() :
  76               v8::Handle<v8::Function>(),
  77           args.GetIsolate()));
  78   guest_view_container->IssueRequest(request);
  79
  80   args.GetReturnValue().Set(v8::Boolean::New(context()->isolate(), true));
  81 }
  82
  83 void GuestViewInternalCustomBindings::RegisterDestructionCallback(
  84     const v8::FunctionCallbackInfo<v8::Value>& args) {
  85   // There are two parameters.
  86   CHECK(args.Length() == 2);
  87   // Element Instance ID.
  88   CHECK(args[0]->IsInt32());
  89   // Callback function.
  90   CHECK(args[1]->IsFunction());
  91
  92   int element_instance_id = args[0]->Int32Value();
  93   // An element instance ID uniquely identifies a ExtensionsGuestViewContainer
  94   // within a RenderView.
  95   ExtensionsGuestViewContainer* guest_view_container =
  96       ExtensionsGuestViewContainer::FromID(element_instance_id);
  97   if (!guest_view_container)
  98     return;
  99
 100   guest_view_container->RegisterDestructionCallback(args[1].As<v8::Function>(),
 101                                                     args.GetIsolate());
 102
 103   args.GetReturnValue().Set(v8::Boolean::New(context()->isolate(), true));
 104 }
 105
 106 }  // namespace extensions