src/chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.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
   6 #include "chrome/browser/guest_view/web_view/chrome_web_view_guest_delegate.h"
   7
   8 #include "chrome/browser/extensions/chrome_extension_web_contents_observer.h"
   9 #include "chrome/browser/favicon/favicon_tab_helper.h"
  10 #include "chrome/browser/renderer_context_menu/render_view_context_menu.h"
  11 #include "chrome/browser/ui/pdf/chrome_pdf_web_contents_helper_client.h"
  12 #include "chrome/browser/ui/zoom/zoom_controller.h"
  13 #include "chrome/common/chrome_version_info.h"
  14 #include "components/pdf/browser/pdf_web_contents_helper.h"
  15 #include "components/renderer_context_menu/context_menu_delegate.h"
  16 #include "content/public/common/page_zoom.h"
  17 #include "extensions/browser/api/web_request/web_request_api.h"
  18 #include "extensions/browser/guest_view/web_view/web_view_constants.h"
  19
  20 #if defined(ENABLE_PRINTING)
  21 #if defined(ENABLE_FULL_PRINTING)
  22 #include "chrome/browser/printing/print_preview_message_handler.h"
  23 #include "chrome/browser/printing/print_view_manager.h"
  24 #else
  25 #include "chrome/browser/printing/print_view_manager_basic.h"
  26 #endif  // defined(ENABLE_FULL_PRINTING)
  27 #endif  // defined(ENABLE_PRINTING)
  28
  29 void RemoveWebViewEventListenersOnIOThread(
  30     void* profile,
  31     const std::string& extension_id,
  32     int embedder_process_id,
  33     int view_instance_id) {
  34   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
  35   ExtensionWebRequestEventRouter::GetInstance()->RemoveWebViewEventListeners(
  36       profile,
  37       extension_id,
  38       embedder_process_id,
  39       view_instance_id);
  40 }
  41
  42 ChromeWebViewGuestDelegate::ChromeWebViewGuestDelegate(
  43     extensions::WebViewGuest* web_view_guest)
  44     : pending_context_menu_request_id_(0),
  45       chromevox_injected_(false),
  46       current_zoom_factor_(1.0),
  47       web_view_guest_(web_view_guest) {
  48 }
  49
  50 ChromeWebViewGuestDelegate::~ChromeWebViewGuestDelegate() {
  51 }
  52
  53 double ChromeWebViewGuestDelegate::GetZoom() {
  54   return current_zoom_factor_;
  55 }
  56
  57 bool ChromeWebViewGuestDelegate::HandleContextMenu(
  58     const content::ContextMenuParams& params) {
  59   ContextMenuDelegate* menu_delegate =
  60       ContextMenuDelegate::FromWebContents(guest_web_contents());
  61   DCHECK(menu_delegate);
  62
  63   pending_menu_ = menu_delegate->BuildMenu(guest_web_contents(), params);
  64
  65   // Pass it to embedder.
  66   int request_id = ++pending_context_menu_request_id_;
  67   scoped_ptr<base::DictionaryValue> args(new base::DictionaryValue());
  68   scoped_ptr<base::ListValue> items =
  69       MenuModelToValue(pending_menu_->menu_model());
  70   args->Set(webview::kContextMenuItems, items.release());
  71   args->SetInteger(webview::kRequestId, request_id);
  72   web_view_guest()->DispatchEventToEmbedder(
  73       new extensions::GuestViewBase::Event(
  74           webview::kEventContextMenu, args.Pass()));
  75   return true;
  76 }
  77
  78 // TODO(hanxi) Investigate which of these observers should move to the
  79 // extension module in the future.
  80 void ChromeWebViewGuestDelegate::OnAttachWebViewHelpers(
  81     content::WebContents* contents) {
  82   // Create a zoom controller for the guest contents give it access to
  83   // GetZoomLevel() and and SetZoomLevel() in WebViewGuest.
  84   // TODO(wjmaclean) This currently uses the same HostZoomMap as the browser
  85   // context, but we eventually want to isolate the guest contents from zoom
  86   // changes outside the guest (e.g. in the main browser), so we should
  87   // create a separate HostZoomMap for the guest.
  88   ZoomController::CreateForWebContents(contents);
  89
  90   FaviconTabHelper::CreateForWebContents(contents);
  91   extensions::ChromeExtensionWebContentsObserver::
  92       CreateForWebContents(contents);
  93 #if defined(ENABLE_PRINTING)
  94 #if defined(ENABLE_FULL_PRINTING)
  95   printing::PrintViewManager::CreateForWebContents(contents);
  96   printing::PrintPreviewMessageHandler::CreateForWebContents(contents);
  97 #else
  98   printing::PrintViewManagerBasic::CreateForWebContents(contents);
  99 #endif  // defined(ENABLE_FULL_PRINTING)
 100 #endif  // defined(ENABLE_PRINTING)
 101   pdf::PDFWebContentsHelper::CreateForWebContentsWithClient(
 102       contents,
 103       scoped_ptr<pdf::PDFWebContentsHelperClient>(
 104           new ChromePDFWebContentsHelperClient()));
 105 }
 106
 107 void ChromeWebViewGuestDelegate::OnEmbedderDestroyed() {
 108   // TODO(fsamuel): WebRequest event listeners for <webview> should survive
 109   // reparenting of a <webview> within a single embedder. Right now, we keep
 110   // around the browser state for the listener for the lifetime of the embedder.
 111   // Ideally, the lifetime of the listeners should match the lifetime of the
 112   // <webview> DOM node. Once http://crbug.com/156219 is resolved we can move
 113   // the call to RemoveWebViewEventListenersOnIOThread back to
 114   // WebViewGuest::WebContentsDestroyed.
 115   content::BrowserThread::PostTask(
 116       content::BrowserThread::IO,
 117       FROM_HERE,
 118       base::Bind(
 119           &RemoveWebViewEventListenersOnIOThread,
 120           web_view_guest()->browser_context(),
 121           web_view_guest()->embedder_extension_id(),
 122           web_view_guest()->embedder_render_process_id(),
 123           web_view_guest()->view_instance_id()));
 124 }
 125
 126 void ChromeWebViewGuestDelegate::OnDidAttachToEmbedder() {
 127   // TODO(fsamuel): This code should be implemented in GuestViewBase once the
 128   // ZoomController moves to the extensions module.
 129   ZoomController* zoom_controller = ZoomController::FromWebContents(
 130       web_view_guest()->embedder_web_contents());
 131   if (!zoom_controller)
 132     return;
 133   // Listen to the embedder's zoom changes.
 134   zoom_controller->AddObserver(this);
 135   // Set the guest's initial zoom level to be equal to the embedder's.
 136   ZoomController::FromWebContents(guest_web_contents())->
 137       SetZoomLevel(zoom_controller->GetZoomLevel());
 138 }
 139
 140 void ChromeWebViewGuestDelegate::OnDidCommitProvisionalLoadForFrame(
 141     bool is_main_frame) {
 142   // Update the current zoom factor for the new page.
 143   ZoomController* zoom_controller =
 144       ZoomController::FromWebContents(guest_web_contents());
 145   DCHECK(zoom_controller);
 146   current_zoom_factor_ = zoom_controller->GetZoomLevel();
 147   if (is_main_frame)
 148     chromevox_injected_ = false;
 149 }
 150
 151 void ChromeWebViewGuestDelegate::OnDidInitialize() {
 152 #if defined(OS_CHROMEOS)
 153   chromeos::AccessibilityManager* accessibility_manager =
 154       chromeos::AccessibilityManager::Get();
 155   CHECK(accessibility_manager);
 156   accessibility_subscription_ = accessibility_manager->RegisterCallback(
 157       base::Bind(&ChromeWebViewGuestDelegate::OnAccessibilityStatusChanged,
 158                  base::Unretained(this)));
 159 #endif
 160 }
 161
 162 void ChromeWebViewGuestDelegate::OnDocumentLoadedInFrame(
 163     content::RenderFrameHost* render_frame_host) {
 164   if (!render_frame_host->GetParent())
 165     InjectChromeVoxIfNeeded(render_frame_host->GetRenderViewHost());
 166 }
 167
 168 void ChromeWebViewGuestDelegate::OnGuestDestroyed() {
 169   // Clean up custom context menu items for this guest.
 170   extensions::MenuManager* menu_manager = extensions::MenuManager::Get(
 171       Profile::FromBrowserContext(web_view_guest()->browser_context()));
 172   menu_manager->RemoveAllContextItems(extensions::MenuItem::ExtensionKey(
 173       web_view_guest()->embedder_extension_id(),
 174       web_view_guest()->view_instance_id()));
 175 }
 176
 177 // static
 178 scoped_ptr<base::ListValue> ChromeWebViewGuestDelegate::MenuModelToValue(
 179     const ui::SimpleMenuModel& menu_model) {
 180   scoped_ptr<base::ListValue> items(new base::ListValue());
 181   for (int i = 0; i < menu_model.GetItemCount(); ++i) {
 182     base::DictionaryValue* item_value = new base::DictionaryValue();
 183     // TODO(lazyboy): We need to expose some kind of enum equivalent of
 184     // |command_id| instead of plain integers.
 185     item_value->SetInteger(webview::kMenuItemCommandId,
 186                            menu_model.GetCommandIdAt(i));
 187     item_value->SetString(webview::kMenuItemLabel, menu_model.GetLabelAt(i));
 188     items->Append(item_value);
 189   }
 190   return items.Pass();
 191 }
 192
 193 void ChromeWebViewGuestDelegate::OnSetZoom(double zoom_factor) {
 194   ZoomController* zoom_controller =
 195       ZoomController::FromWebContents(guest_web_contents());
 196   DCHECK(zoom_controller);
 197   double zoom_level = content::ZoomFactorToZoomLevel(zoom_factor);
 198   zoom_controller->SetZoomLevel(zoom_level);
 199
 200   scoped_ptr<base::DictionaryValue> args(new base::DictionaryValue());
 201   args->SetDouble(webview::kOldZoomFactor, current_zoom_factor_);
 202   args->SetDouble(webview::kNewZoomFactor, zoom_factor);
 203   web_view_guest()->DispatchEventToEmbedder(
 204       new extensions::GuestViewBase::Event(
 205           webview::kEventZoomChange, args.Pass()));
 206   current_zoom_factor_ = zoom_factor;
 207 }
 208
 209 void ChromeWebViewGuestDelegate::OnShowContextMenu(
 210     int request_id,
 211     const MenuItemVector* items) {
 212   if (!pending_menu_.get())
 213     return;
 214
 215   // Make sure this was the correct request.
 216   if (request_id != pending_context_menu_request_id_)
 217     return;
 218
 219   // TODO(lazyboy): Implement.
 220   DCHECK(!items);
 221
 222   ContextMenuDelegate* menu_delegate =
 223       ContextMenuDelegate::FromWebContents(guest_web_contents());
 224   menu_delegate->ShowMenu(pending_menu_.Pass());
 225 }
 226
 227 void ChromeWebViewGuestDelegate::InjectChromeVoxIfNeeded(
 228     content::RenderViewHost* render_view_host) {
 229 #if defined(OS_CHROMEOS)
 230   if (!chromevox_injected_) {
 231     chromeos::AccessibilityManager* manager =
 232         chromeos::AccessibilityManager::Get();
 233     if (manager && manager->IsSpokenFeedbackEnabled()) {
 234       manager->InjectChromeVox(render_view_host);
 235       chromevox_injected_ = true;
 236     }
 237   }
 238 #endif
 239 }
 240
 241 #if defined(OS_CHROMEOS)
 242 void ChromeWebViewGuestDelegate::OnAccessibilityStatusChanged(
 243     const chromeos::AccessibilityStatusEventDetails& details) {
 244   if (details.notification_type == chromeos::ACCESSIBILITY_MANAGER_SHUTDOWN) {
 245     accessibility_subscription_.reset();
 246   } else if (details.notification_type ==
 247       chromeos::ACCESSIBILITY_TOGGLE_SPOKEN_FEEDBACK) {
 248     if (details.enabled)
 249       InjectChromeVoxIfNeeded(guest_web_contents()->GetRenderViewHost());
 250     else
 251       chromevox_injected_ = false;
 252   }
 253 }
 254 #endif
 255
 256 void ChromeWebViewGuestDelegate::OnZoomChanged(
 257     const ZoomController::ZoomChangedEventData& data) {
 258   ZoomController::FromWebContents(guest_web_contents())->
 259       SetZoomLevel(data.new_zoom_level);
 260 }