src/extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.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/browser/guest_view/mime_handler_view/mime_handler_view_guest.h"
   6
   7 #include "base/strings/stringprintf.h"
   8 #include "content/public/browser/browser_thread.h"
   9 #include "content/public/browser/render_process_host.h"
  10 #include "content/public/common/url_constants.h"
  11 #include "extensions/browser/api/extensions_api_client.h"
  12 #include "extensions/browser/extension_registry.h"
  13 #include "extensions/browser/extension_system.h"
  14 #include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_constants.h"
  15 #include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest_delegate.h"
  16 #include "extensions/browser/process_manager.h"
  17 #include "extensions/common/extension_messages.h"
  18 #include "extensions/common/feature_switch.h"
  19 #include "extensions/common/guest_view/guest_view_constants.h"
  20 #include "extensions/strings/grit/extensions_strings.h"
  21 #include "ipc/ipc_message_macros.h"
  22 #include "net/base/url_util.h"
  23
  24 using content::WebContents;
  25
  26 namespace extensions {
  27
  28 // static
  29 const char MimeHandlerViewGuest::Type[] = "mimehandler";
  30
  31 // static
  32 GuestViewBase* MimeHandlerViewGuest::Create(
  33     content::BrowserContext* browser_context,
  34     int guest_instance_id) {
  35   if (!extensions::FeatureSwitch::mime_handler_view()->IsEnabled())
  36     return NULL;
  37
  38   return new MimeHandlerViewGuest(browser_context, guest_instance_id);
  39 }
  40
  41 MimeHandlerViewGuest::MimeHandlerViewGuest(
  42     content::BrowserContext* browser_context,
  43     int guest_instance_id)
  44     : GuestView<MimeHandlerViewGuest>(browser_context, guest_instance_id),
  45       delegate_(ExtensionsAPIClient::Get()->CreateMimeHandlerViewGuestDelegate(
  46           this)) {
  47 }
  48
  49 MimeHandlerViewGuest::~MimeHandlerViewGuest() {
  50 }
  51
  52 WindowController* MimeHandlerViewGuest::GetExtensionWindowController() const {
  53   return NULL;
  54 }
  55
  56 WebContents* MimeHandlerViewGuest::GetAssociatedWebContents() const {
  57   return web_contents();
  58 }
  59
  60 const char* MimeHandlerViewGuest::GetAPINamespace() const {
  61   return "mimeHandlerViewGuestInternal";
  62 }
  63
  64 int MimeHandlerViewGuest::GetTaskPrefix() const {
  65   return IDS_EXTENSION_TASK_MANAGER_MIMEHANDLERVIEW_TAG_PREFIX;
  66 }
  67
  68 // |embedder_extension_id| is empty for mime handler view.
  69 void MimeHandlerViewGuest::CreateWebContents(
  70     const std::string& embedder_extension_id,
  71     int embedder_render_process_id,
  72     const GURL& embedder_site_url,
  73     const base::DictionaryValue& create_params,
  74     const WebContentsCreatedCallback& callback) {
  75   std::string orig_mime_type;
  76   create_params.GetString(mime_handler_view::kMimeType, &orig_mime_type);
  77   DCHECK(!orig_mime_type.empty());
  78
  79   std::string extension_src;
  80   create_params.GetString(mime_handler_view::kSrc, &extension_src);
  81   DCHECK(!extension_src.empty());
  82
  83   GURL mime_handler_extension_url(extension_src);
  84   if (!mime_handler_extension_url.is_valid()) {
  85     callback.Run(NULL);
  86     return;
  87   }
  88
  89   const Extension* mime_handler_extension =
  90       // TODO(lazyboy): Do we need handle the case where the extension is
  91       // terminated (ExtensionRegistry::TERMINATED)?
  92       ExtensionRegistry::Get(browser_context())->enabled_extensions().GetByID(
  93           mime_handler_extension_url.host());
  94   if (!mime_handler_extension) {
  95     LOG(ERROR) << "Extension for mime_type not found, mime_type = "
  96                << orig_mime_type;
  97     callback.Run(NULL);
  98     return;
  99   }
 100
 101   ProcessManager* process_manager =
 102       ExtensionSystem::Get(browser_context())->process_manager();
 103   DCHECK(process_manager);
 104
 105   // Use the mime handler extension's SiteInstance to create the guest so it
 106   // goes under the same process as the extension.
 107   content::SiteInstance* guest_site_instance =
 108       process_manager->GetSiteInstanceForURL(
 109           Extension::GetBaseURLFromExtensionId(embedder_extension_id));
 110
 111   WebContents::CreateParams params(browser_context(), guest_site_instance);
 112   params.guest_delegate = this;
 113   callback.Run(WebContents::Create(params));
 114 }
 115
 116 void MimeHandlerViewGuest::DidAttachToEmbedder() {
 117   std::string src;
 118   bool success = attach_params()->GetString(mime_handler_view::kSrc, &src);
 119   DCHECK(success && !src.empty());
 120   web_contents()->GetController().LoadURL(
 121       GURL(src),
 122       content::Referrer(),
 123       ui::PAGE_TRANSITION_AUTO_TOPLEVEL,
 124       std::string());
 125 }
 126
 127 void MimeHandlerViewGuest::DidInitialize() {
 128   extension_function_dispatcher_.reset(
 129       new ExtensionFunctionDispatcher(browser_context(), this));
 130   if (delegate_)
 131     delegate_->AttachHelpers();
 132 }
 133
 134 void MimeHandlerViewGuest::ContentsZoomChange(bool zoom_in) {
 135   if (delegate_)
 136     delegate_->ChangeZoom(zoom_in);
 137 }
 138
 139 void MimeHandlerViewGuest::HandleKeyboardEvent(
 140     WebContents* source,
 141     const content::NativeWebKeyboardEvent& event) {
 142   if (!attached())
 143     return;
 144
 145   // Send the keyboard events back to the embedder to reprocess them.
 146   // TODO(fsamuel): This introduces the possibility of out-of-order keyboard
 147   // events because the guest may be arbitrarily delayed when responding to
 148   // keyboard events. In that time, the embedder may have received and processed
 149   // additional key events. This needs to be fixed as soon as possible.
 150   // See http://crbug.com/229882.
 151   embedder_web_contents()->GetDelegate()->HandleKeyboardEvent(web_contents(),
 152                                                               event);
 153 }
 154
 155 bool MimeHandlerViewGuest::OnMessageReceived(const IPC::Message& message) {
 156   bool handled = true;
 157   IPC_BEGIN_MESSAGE_MAP(MimeHandlerViewGuest, message)
 158     IPC_MESSAGE_HANDLER(ExtensionHostMsg_Request, OnRequest)
 159     IPC_MESSAGE_UNHANDLED(handled = false)
 160   IPC_END_MESSAGE_MAP()
 161   return handled;
 162 }
 163
 164 void MimeHandlerViewGuest::OnRequest(
 165     const ExtensionHostMsg_Request_Params& params) {
 166   if (extension_function_dispatcher_) {
 167     extension_function_dispatcher_->Dispatch(
 168         params, web_contents()->GetRenderViewHost());
 169   }
 170 }
 171
 172 }  // namespace extensions