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/api/web_request/web_request_api.h"
   9 #include "chrome/browser/extensions/chrome_extension_web_contents_observer.h"
  10 #include "chrome/browser/favicon/favicon_tab_helper.h"
  11 #include "chrome/browser/renderer_context_menu/render_view_context_menu.h"
  12 #include "chrome/browser/ui/pdf/chrome_pdf_web_contents_helper_client.h"
  13 #include "chrome/browser/ui/zoom/zoom_controller.h"
  14 #include "chrome/common/chrome_version_info.h"
  15 #include "components/pdf/browser/pdf_web_contents_helper.h"
  16 #include "components/renderer_context_menu/context_menu_delegate.h"
  17 #include "content/public/common/page_zoom.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   : WebViewGuestDelegate(web_view_guest),
  45     find_helper_(web_view_guest),
  46     pending_context_menu_request_id_(0),
  47     chromevox_injected_(false),
  48     current_zoom_factor_(1.0) {
  49 }
  50
  51 ChromeWebViewGuestDelegate::~ChromeWebViewGuestDelegate() {
  52 }
  53
  54 void ChromeWebViewGuestDelegate::Find(
  55     const base::string16& search_text,
  56     const blink::WebFindOptions& options,
  57     extensions::WebViewInternalFindFunction* find_function) {
  58   find_helper_.Find(guest_web_contents(), search_text, options, find_function);
  59 }
  60
  61 void ChromeWebViewGuestDelegate::FindReply(content::WebContents* source,
  62                                            int request_id,
  63                                            int number_of_matches,
  64                                            const gfx::Rect& selection_rect,
  65                                            int active_match_ordinal,
  66                                            bool final_update) {
  67   find_helper_.FindReply(request_id, number_of_matches, selection_rect,
  68                          active_match_ordinal, final_update);
  69 }
  70
  71 void ChromeWebViewGuestDelegate::StopFinding(content::StopFindAction action) {
  72   find_helper_.CancelAllFindSessions();
  73   guest_web_contents()->StopFinding(action);
  74 }
  75
  76 double ChromeWebViewGuestDelegate::GetZoom() {
  77   return current_zoom_factor_;
  78 }
  79
  80 bool ChromeWebViewGuestDelegate::HandleContextMenu(
  81     const content::ContextMenuParams& params) {
  82   ContextMenuDelegate* menu_delegate =
  83       ContextMenuDelegate::FromWebContents(guest_web_contents());
  84   DCHECK(menu_delegate);
  85
  86   pending_menu_ = menu_delegate->BuildMenu(guest_web_contents(), params);
  87
  88   // Pass it to embedder.
  89   int request_id = ++pending_context_menu_request_id_;
  90   scoped_ptr<base::DictionaryValue> args(new base::DictionaryValue());
  91   scoped_ptr<base::ListValue> items =
  92       MenuModelToValue(pending_menu_->menu_model());
  93   args->Set(webview::kContextMenuItems, items.release());
  94   args->SetInteger(webview::kRequestId, request_id);
  95   web_view_guest()->DispatchEventToEmbedder(
  96       new extensions::GuestViewBase::Event(
  97           webview::kEventContextMenu, args.Pass()));
  98   return true;
  99 }
 100
 101 // TODO(hanxi) Investigate which of these observers should move to the
 102 // extension module in the future.
 103 void ChromeWebViewGuestDelegate::OnAttachWebViewHelpers(
 104     content::WebContents* contents) {
 105   // Create a zoom controller for the guest contents give it access to
 106   // GetZoomLevel() and and SetZoomLevel() in WebViewGuest.
 107   // TODO(wjmaclean) This currently uses the same HostZoomMap as the browser
 108   // context, but we eventually want to isolate the guest contents from zoom
 109   // changes outside the guest (e.g. in the main browser), so we should
 110   // create a separate HostZoomMap for the guest.
 111   ZoomController::CreateForWebContents(contents);
 112
 113   FaviconTabHelper::CreateForWebContents(contents);
 114   extensions::ChromeExtensionWebContentsObserver::
 115       CreateForWebContents(contents);
 116 #if defined(ENABLE_PRINTING)
 117 #if defined(ENABLE_FULL_PRINTING)
 118   printing::PrintViewManager::CreateForWebContents(contents);
 119   printing::PrintPreviewMessageHandler::CreateForWebContents(contents);
 120 #else
 121   printing::PrintViewManagerBasic::CreateForWebContents(contents);
 122 #endif  // defined(ENABLE_FULL_PRINTING)
 123 #endif  // defined(ENABLE_PRINTING)
 124   pdf::PDFWebContentsHelper::CreateForWebContentsWithClient(
 125       contents,
 126       scoped_ptr<pdf::PDFWebContentsHelperClient>(
 127           new ChromePDFWebContentsHelperClient()));
 128 }
 129
 130 void ChromeWebViewGuestDelegate::OnEmbedderDestroyed() {
 131   // TODO(fsamuel): WebRequest event listeners for <webview> should survive
 132   // reparenting of a <webview> within a single embedder. Right now, we keep
 133   // around the browser state for the listener for the lifetime of the embedder.
 134   // Ideally, the lifetime of the listeners should match the lifetime of the
 135   // <webview> DOM node. Once http://crbug.com/156219 is resolved we can move
 136   // the call to RemoveWebViewEventListenersOnIOThread back to
 137   // WebViewGuest::WebContentsDestroyed.
 138   content::BrowserThread::PostTask(
 139       content::BrowserThread::IO,
 140       FROM_HERE,
 141       base::Bind(
 142           &RemoveWebViewEventListenersOnIOThread,
 143           web_view_guest()->browser_context(),
 144           web_view_guest()->embedder_extension_id(),
 145           web_view_guest()->embedder_render_process_id(),
 146           web_view_guest()->view_instance_id()));
 147 }
 148
 149 void ChromeWebViewGuestDelegate::OnDidCommitProvisionalLoadForFrame(
 150     bool is_main_frame) {
 151   find_helper_.CancelAllFindSessions();
 152
 153   // Update the current zoom factor for the new page.
 154   ZoomController* zoom_controller =
 155       ZoomController::FromWebContents(guest_web_contents());
 156   DCHECK(zoom_controller);
 157   current_zoom_factor_ = zoom_controller->GetZoomLevel();
 158   if (is_main_frame)
 159     chromevox_injected_ = false;
 160 }
 161
 162 void ChromeWebViewGuestDelegate::OnDidInitialize() {
 163 #if defined(OS_CHROMEOS)
 164   chromeos::AccessibilityManager* accessibility_manager =
 165       chromeos::AccessibilityManager::Get();
 166   CHECK(accessibility_manager);
 167   accessibility_subscription_ = accessibility_manager->RegisterCallback(
 168       base::Bind(&ChromeWebViewGuestDelegate::OnAccessibilityStatusChanged,
 169                  base::Unretained(this)));
 170 #endif
 171 }
 172
 173 void ChromeWebViewGuestDelegate::OnDocumentLoadedInFrame(
 174     content::RenderFrameHost* render_frame_host) {
 175   if (!render_frame_host->GetParent())
 176     InjectChromeVoxIfNeeded(render_frame_host->GetRenderViewHost());
 177 }
 178
 179 void ChromeWebViewGuestDelegate::OnGuestDestroyed() {
 180   // Clean up custom context menu items for this guest.
 181   extensions::MenuManager* menu_manager = extensions::MenuManager::Get(
 182       Profile::FromBrowserContext(web_view_guest()->browser_context()));
 183   menu_manager->RemoveAllContextItems(extensions::MenuItem::ExtensionKey(
 184       web_view_guest()->embedder_extension_id(),
 185       web_view_guest()->view_instance_id()));
 186 }
 187
 188 // static
 189 scoped_ptr<base::ListValue> ChromeWebViewGuestDelegate::MenuModelToValue(
 190     const ui::SimpleMenuModel& menu_model) {
 191   scoped_ptr<base::ListValue> items(new base::ListValue());
 192   for (int i = 0; i < menu_model.GetItemCount(); ++i) {
 193     base::DictionaryValue* item_value = new base::DictionaryValue();
 194     // TODO(lazyboy): We need to expose some kind of enum equivalent of
 195     // |command_id| instead of plain integers.
 196     item_value->SetInteger(webview::kMenuItemCommandId,
 197                            menu_model.GetCommandIdAt(i));
 198     item_value->SetString(webview::kMenuItemLabel, menu_model.GetLabelAt(i));
 199     items->Append(item_value);
 200   }
 201   return items.Pass();
 202 }
 203
 204 void ChromeWebViewGuestDelegate::OnRenderProcessGone() {
 205   // Cancel all find sessions in progress.
 206   find_helper_.CancelAllFindSessions();
 207 }
 208
 209 void ChromeWebViewGuestDelegate::OnSetZoom(double zoom_factor) {
 210   ZoomController* zoom_controller =
 211       ZoomController::FromWebContents(guest_web_contents());
 212   DCHECK(zoom_controller);
 213   double zoom_level = content::ZoomFactorToZoomLevel(zoom_factor);
 214   zoom_controller->SetZoomLevel(zoom_level);
 215
 216   scoped_ptr<base::DictionaryValue> args(new base::DictionaryValue());
 217   args->SetDouble(webview::kOldZoomFactor, current_zoom_factor_);
 218   args->SetDouble(webview::kNewZoomFactor, zoom_factor);
 219   web_view_guest()->DispatchEventToEmbedder(
 220       new extensions::GuestViewBase::Event(
 221           webview::kEventZoomChange, args.Pass()));
 222   current_zoom_factor_ = zoom_factor;
 223 }
 224
 225 void ChromeWebViewGuestDelegate::OnShowContextMenu(
 226     int request_id,
 227     const MenuItemVector* items) {
 228   if (!pending_menu_.get())
 229     return;
 230
 231   // Make sure this was the correct request.
 232   if (request_id != pending_context_menu_request_id_)
 233     return;
 234
 235   // TODO(lazyboy): Implement.
 236   DCHECK(!items);
 237
 238   ContextMenuDelegate* menu_delegate =
 239       ContextMenuDelegate::FromWebContents(guest_web_contents());
 240   menu_delegate->ShowMenu(pending_menu_.Pass());
 241 }
 242
 243 void ChromeWebViewGuestDelegate::InjectChromeVoxIfNeeded(
 244     content::RenderViewHost* render_view_host) {
 245 #if defined(OS_CHROMEOS)
 246   if (!chromevox_injected_) {
 247     chromeos::AccessibilityManager* manager =
 248         chromeos::AccessibilityManager::Get();
 249     if (manager && manager->IsSpokenFeedbackEnabled()) {
 250       manager->InjectChromeVox(render_view_host);
 251       chromevox_injected_ = true;
 252     }
 253   }
 254 #endif
 255 }
 256
 257 #if defined(OS_CHROMEOS)
 258 void ChromeWebViewGuestDelegate::OnAccessibilityStatusChanged(
 259     const chromeos::AccessibilityStatusEventDetails& details) {
 260   if (details.notification_type == chromeos::ACCESSIBILITY_MANAGER_SHUTDOWN) {
 261     accessibility_subscription_.reset();
 262   } else if (details.notification_type ==
 263       chromeos::ACCESSIBILITY_TOGGLE_SPOKEN_FEEDBACK) {
 264     if (details.enabled)
 265       InjectChromeVoxIfNeeded(guest_web_contents()->GetRenderViewHost());
 266     else
 267       chromevox_injected_ = false;
 268   }
 269 }
 270 #endif