Implementation of device metrics emulation in render view.

content/renderer/gpu/input_handler_manager.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/gpu/input_handler_manager.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "cc/input/input_handler.h"
@@ skipping 75 matching lines @@
 
   TRACE_EVENT1("input",
       "InputHandlerManager::AddInputHandlerOnCompositorThread",
       "result", "AddingRoute");
   client_->DidAddInputHandler(routing_id, input_handler.get());
   input_handlers_[routing_id] =
       make_scoped_refptr(new InputHandlerWrapper(this,
           routing_id, main_loop, input_handler, render_view_impl));
 }
 
+void InputHandlerManager::SetInputEventRewriter(
+    int routing_id,
+    scoped_ptr<InputEventRewriter> rewriter) {
+  message_loop_proxy_->PostTask(
+      FROM_HERE,
+      base::Bind(&InputHandlerManager::SetInputEventRewriterOnCompositorThread,
+                 base::Unretained(this),
+                 routing_id,
+                 base::Passed(&rewriter)));
+}
+
+void InputHandlerManager::SetInputEventRewriterOnCompositorThread(
+    int routing_id,
+    scoped_ptr<InputEventRewriter> rewriter) {
+  InputHandlerMap::iterator it = input_handlers_.find(routing_id);
+  if (it != input_handlers_.end())
+    it->second->SetRewriter(rewriter.Pass());
+}
+
 void InputHandlerManager::RemoveInputHandler(int routing_id) {
   DCHECK(message_loop_proxy_->BelongsToCurrentThread());
 
   TRACE_EVENT0("input", "InputHandlerManager::RemoveInputHandler");
 
   client_->DidRemoveInputHandler(routing_id);
   input_handlers_.erase(routing_id);
 }
 
 InputEventAckState InputHandlerManager::HandleInputEvent(
     int routing_id,
     const WebInputEvent* input_event,
     const ui::LatencyInfo& latency_info) {
   DCHECK(message_loop_proxy_->BelongsToCurrentThread());
 
   InputHandlerMap::iterator it = input_handlers_.find(routing_id);
   if (it == input_handlers_.end()) {
     TRACE_EVENT1("input", "InputHandlerManager::HandleInputEvent",
                   "result", "NoInputHandlerFound");
     // Oops, we no longer have an interested input handler..
     return INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
   }
 
+  scoped_ptr<WebInputEvent> rewritten_event_owner;
+  InputEventRewriter* rewriter = it->second->rewriter();
+  if (rewriter) {
+    WebInputEvent* rewritten = rewriter->RewriteInputEvent(input_event);
+    if (rewritten) {
+      rewritten_event_owner.reset(rewritten);
+      input_event = rewritten;
+    }
+  }
+
   InputHandlerProxy* proxy = it->second->input_handler_proxy();
   return InputEventDispositionToAck(
       proxy->HandleInputEventWithLatencyInfo(*input_event, latency_info));
 }
 
 void InputHandlerManager::DidOverscroll(int routing_id,
                                         const cc::DidOverscrollParams& params) {
   client_->DidOverscroll(routing_id, params);
 }
 
 
 
 }  // namespace content