src/chrome/renderer/extensions/app_window_custom_bindings.cc

   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 "chrome/renderer/extensions/app_window_custom_bindings.h"
   6
   7 #include <string>
   8
   9 #include "base/command_line.h"
  10 #include "chrome/common/chrome_switches.h"
  11 #include "chrome/grit/renderer_resources.h"
  12 #include "content/public/renderer/render_thread.h"
  13 #include "content/public/renderer/render_view.h"
  14 #include "content/public/renderer/render_view_observer.h"
  15 #include "content/public/renderer/render_view_visitor.h"
  16 #include "content/public/renderer/v8_value_converter.h"
  17 #include "extensions/common/extension_messages.h"
  18 #include "extensions/renderer/dispatcher.h"
  19 #include "extensions/renderer/scoped_persistent.h"
  20 #include "extensions/renderer/script_context.h"
  21 #include "extensions/renderer/script_context_set.h"
  22 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  23 #include "third_party/WebKit/public/web/WebView.h"
  24 #include "ui/base/resource/resource_bundle.h"
  25 #include "v8/include/v8.h"
  26
  27 namespace extensions {
  28
  29 class DidCreateDocumentElementObserver : public content::RenderViewObserver {
  30  public:
  31   DidCreateDocumentElementObserver(content::RenderView* view,
  32                                    Dispatcher* dispatcher)
  33       : content::RenderViewObserver(view), dispatcher_(dispatcher) {}
  34
  35   virtual void DidCreateDocumentElement(blink::WebLocalFrame* frame) OVERRIDE {
  36     DCHECK(frame);
  37     DCHECK(dispatcher_);
  38     // Don't attempt to inject the titlebar into iframes.
  39     if (frame->parent())
  40       return;
  41     v8::HandleScope handle_scope(v8::Isolate::GetCurrent());
  42     ScriptContext* script_context =
  43         dispatcher_->script_context_set().GetByV8Context(
  44             frame->mainWorldScriptContext());
  45
  46     if (!script_context)
  47       return;
  48     v8::Context::Scope context_scope(script_context->v8_context());
  49     script_context->module_system()->CallModuleMethod(
  50         "injectAppTitlebar", "didCreateDocumentElement");
  51   }
  52
  53  private:
  54   Dispatcher* dispatcher_;
  55 };
  56
  57 AppWindowCustomBindings::AppWindowCustomBindings(Dispatcher* dispatcher,
  58                                                  ScriptContext* context)
  59     : ObjectBackedNativeHandler(context), dispatcher_(dispatcher) {
  60   RouteFunction("GetView",
  61       base::Bind(&AppWindowCustomBindings::GetView,
  62                  base::Unretained(this)));
  63
  64   RouteFunction("GetWindowControlsHtmlTemplate",
  65       base::Bind(&AppWindowCustomBindings::GetWindowControlsHtmlTemplate,
  66                  base::Unretained(this)));
  67 }
  68
  69 void AppWindowCustomBindings::GetView(
  70     const v8::FunctionCallbackInfo<v8::Value>& args) {
  71   // TODO(jeremya): convert this to IDL nocompile to get validation, and turn
  72   // these argument checks into CHECK().
  73   if (args.Length() != 2)
  74     return;
  75
  76   if (!args[0]->IsInt32())
  77     return;
  78
  79   if (!args[1]->IsBoolean())
  80     return;
  81
  82   int view_id = args[0]->Int32Value();
  83
  84   bool inject_titlebar = args[1]->BooleanValue();
  85
  86   if (view_id == MSG_ROUTING_NONE)
  87     return;
  88
  89   content::RenderView* view = content::RenderView::FromRoutingID(view_id);
  90   if (!view)
  91     return;
  92
  93   if (inject_titlebar)
  94     new DidCreateDocumentElementObserver(view, dispatcher_);
  95
  96   // TODO(jeremya): it doesn't really make sense to set the opener here, but we
  97   // need to make sure the security origin is set up before returning the DOM
  98   // reference. A better way to do this would be to have the browser pass the
  99   // opener through so opener_id is set in RenderViewImpl's constructor.
 100   content::RenderView* render_view = context()->GetRenderView();
 101   if (!render_view)
 102     return;
 103   blink::WebFrame* opener = render_view->GetWebView()->mainFrame();
 104   blink::WebFrame* frame = view->GetWebView()->mainFrame();
 105   frame->setOpener(opener);
 106   content::RenderThread::Get()->Send(
 107       new ExtensionHostMsg_ResumeRequests(view->GetRoutingID()));
 108
 109   v8::Local<v8::Value> window = frame->mainWorldScriptContext()->Global();
 110   args.GetReturnValue().Set(window);
 111 }
 112
 113 void AppWindowCustomBindings::GetWindowControlsHtmlTemplate(
 114     const v8::FunctionCallbackInfo<v8::Value>& args) {
 115   CHECK_EQ(args.Length(), 0);
 116
 117   v8::Handle<v8::Value> result = v8::String::Empty(args.GetIsolate());
 118   if (CommandLine::ForCurrentProcess()->HasSwitch(
 119       switches::kEnableAppWindowControls)) {
 120     base::StringValue value(
 121         ResourceBundle::GetSharedInstance()
 122             .GetRawDataResource(IDR_WINDOW_CONTROLS_TEMPLATE_HTML)
 123             .as_string());
 124     scoped_ptr<content::V8ValueConverter> converter(
 125         content::V8ValueConverter::create());
 126     result = converter->ToV8Value(&value, context()->v8_context());
 127   }
 128   args.GetReturnValue().Set(result);
 129 }
 130
 131 }  // namespace extensions