Implemented GetWindowSnapshot on RenderViewImpl

content/renderer/render_view_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/bind.h"
@@ skipping 576 matching lines @@
       body_background_color_(SK_ColorWHITE),
       update_frame_info_scheduled_(false),
       expected_content_intent_id_(0),
       media_player_proxy_(NULL),
       synchronous_find_active_match_ordinal_(-1),
       ALLOW_THIS_IN_INITIALIZER_LIST(
           load_progress_tracker_(new LoadProgressTracker(this))),
 #endif
       session_storage_namespace_id_(session_storage_namespace_id),
       handling_select_range_(false),
+      next_snapshot_id_(0),
 #if defined(OS_WIN)
       focused_plugin_id_(-1),
 #endif
       updating_frame_tree_(false),
       pending_frame_tree_update_(false),
       target_process_id_(0),
       target_routing_id_(0),
       ALLOW_THIS_IN_INITIALIZER_LIST(pepper_delegate_(this)) {
   set_throttle_input_events(renderer_prefs.throttle_input_events);
   routing_id_ = routing_id;
@@ skipping 393 matching lines @@
     IPC_MESSAGE_HANDLER(ViewMsg_CopyToFindPboard, OnCopyToFindPboard)
     IPC_MESSAGE_HANDLER(ViewMsg_PluginImeCompositionCompleted,
                         OnPluginImeCompositionCompleted)
     IPC_MESSAGE_HANDLER(ViewMsg_SelectPopupMenuItem, OnSelectPopupMenuItem)
     IPC_MESSAGE_HANDLER(ViewMsg_SetInLiveResize, OnSetInLiveResize)
     IPC_MESSAGE_HANDLER(ViewMsg_SetWindowVisibility, OnSetWindowVisibility)
     IPC_MESSAGE_HANDLER(ViewMsg_WindowFrameChanged, OnWindowFrameChanged)
 #endif
     IPC_MESSAGE_HANDLER(ViewMsg_ReleaseDisambiguationPopupDIB,
                         OnReleaseDisambiguationPopupDIB)
+    IPC_MESSAGE_HANDLER(ViewMsg_WindowSnapshotCompleted,
+                        OnWindowSnapshotCompleted)
 
     // Have the super handle all other messages.
     IPC_MESSAGE_UNHANDLED(handled = RenderWidget::OnMessageReceived(message))
   IPC_END_MESSAGE_MAP()
 
   if (!msg_is_ok) {
     // The message had a handler, but its deserialization failed.
     // Kill the renderer to avoid potential spoofing attacks.
     CHECK(false) << "Unable to deserialize message in RenderViewImpl.";
   }
@@ skipping 686 matching lines @@
   // equivalent of WebView::willEnterModalLoop.  In the case of showModalDialog
   // it is particularly important that we do not call willEnterModalLoop as
   // that would defer resource loads for the dialog itself.
   if (RenderThreadImpl::current())  // Will be NULL during unit tests.
     RenderThreadImpl::current()->DoNotNotifyWebKitOfModalLoop();
 
   message->EnableMessagePumping();  // Runs a nested message loop.
   return Send(message);
 }
 
+void RenderViewImpl::GetWindowSnapshot(const WindowSnapshotCallback& callback) {
+  int id = next_smooth_scroll_gesture_id_++;

[Ken Russell (switch to Gerrit), 2012/11/08 22:27:44]

Typo: next_smooth_scroll_gesture_id_ -> next_snapshot_id_.

+  pending_snapshots_.insert(std::make_pair(id, callback));
+  Send(new ViewHostMsg_GetWindowSnapshot(routing_id_, id));
+}
+
+void RenderViewImpl::OnWindowSnapshotCompleted(const int snapshot_id,
+    const gfx::Size& size, const std::vector<unsigned char>& png) {
+  PendingSnapshotMap::iterator it = pending_snapshots_.find(snapshot_id);
+  DCHECK(it != pending_snapshots_.end());
+  it->second.Run(size, png);
+  pending_snapshots_.erase(it);
+}
+
 // WebKit::WebViewClient ------------------------------------------------------
 
 WebView* RenderViewImpl::createView(
     WebFrame* creator,
     const WebURLRequest& request,
     const WebWindowFeatures& features,
     const WebString& frame_name,
     WebNavigationPolicy policy) {
   // Check to make sure we aren't overloading on popups.
   if (shared_popup_counter_->data > kMaximumNumberOfUnacknowledgedPopups)
@@ skipping 4625 matching lines @@
 }
 #endif
 
 void RenderViewImpl::OnReleaseDisambiguationPopupDIB(
     TransportDIB::Handle dib_handle) {
   TransportDIB* dib = TransportDIB::CreateWithHandle(dib_handle);
   RenderProcess::current()->ReleaseTransportDIB(dib);
 }
 
 }  // namespace content