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/lazy_background_page_native_handler.h" 6 7 #include "base/bind.h" 8 #include "content/public/renderer/render_view.h" 9 #include "extensions/common/extension_messages.h" 10 #include "extensions/common/manifest_handlers/background_info.h" 11 #include "extensions/renderer/extension_helper.h" 12 #include "extensions/renderer/script_context.h" 13 14 namespace extensions { 15 LazyBackgroundPageNativeHandler(ScriptContext * context)16LazyBackgroundPageNativeHandler::LazyBackgroundPageNativeHandler( 17 ScriptContext* context) 18 : ObjectBackedNativeHandler(context) { 19 RouteFunction( 20 "IncrementKeepaliveCount", 21 base::Bind(&LazyBackgroundPageNativeHandler::IncrementKeepaliveCount, 22 base::Unretained(this))); 23 RouteFunction( 24 "DecrementKeepaliveCount", 25 base::Bind(&LazyBackgroundPageNativeHandler::DecrementKeepaliveCount, 26 base::Unretained(this))); 27 } 28 IncrementKeepaliveCount(const v8::FunctionCallbackInfo<v8::Value> & args)29void LazyBackgroundPageNativeHandler::IncrementKeepaliveCount( 30 const v8::FunctionCallbackInfo<v8::Value>& args) { 31 if (!context()) 32 return; 33 content::RenderView* render_view = context()->GetRenderView(); 34 if (IsContextLazyBackgroundPage(render_view, context()->extension())) { 35 render_view->Send(new ExtensionHostMsg_IncrementLazyKeepaliveCount( 36 render_view->GetRoutingID())); 37 } 38 } 39 DecrementKeepaliveCount(const v8::FunctionCallbackInfo<v8::Value> & args)40void LazyBackgroundPageNativeHandler::DecrementKeepaliveCount( 41 const v8::FunctionCallbackInfo<v8::Value>& args) { 42 if (!context()) 43 return; 44 content::RenderView* render_view = context()->GetRenderView(); 45 if (IsContextLazyBackgroundPage(render_view, context()->extension())) { 46 render_view->Send(new ExtensionHostMsg_DecrementLazyKeepaliveCount( 47 render_view->GetRoutingID())); 48 } 49 } 50 IsContextLazyBackgroundPage(content::RenderView * render_view,const Extension * extension)51bool LazyBackgroundPageNativeHandler::IsContextLazyBackgroundPage( 52 content::RenderView* render_view, 53 const Extension* extension) { 54 if (!render_view) 55 return false; 56 57 ExtensionHelper* helper = ExtensionHelper::Get(render_view); 58 return (extension && BackgroundInfo::HasLazyBackgroundPage(extension) && 59 helper->view_type() == VIEW_TYPE_EXTENSION_BACKGROUND_PAGE); 60 } 61 62 } // namespace extensions 63