Do something more interesting than printf when an event is received by sample_app.

R=abarth@chromium.org
http://crbug.com/324639

Review URL: https://codereview.chromium.org/108273008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239910 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 62 insertions, 14 deletions

diff --git a/mojo/services/native_viewport/native_viewport_impl.cc b/mojo/services/native_viewport/native_viewport_impl.cc
index 5b980c8..6d04ca4 100644
--- a/mojo/services/native_viewport/native_viewport_impl.cc
+++ b/mojo/services/native_viewport/native_viewport_impl.cc
@@ -5,17 +5,32 @@
 #include "mojo/services/native_viewport/native_viewport_impl.h"
 
 #include "base/message_loop/message_loop.h"
+#include "base/time/time.h"
 #include "mojo/services/gles2/gles2_impl.h"
 #include "mojo/services/native_viewport/native_viewport.h"
 #include "ui/events/event.h"
 
 namespace mojo {
 namespace services {
+namespace {
+
+bool IsRateLimitedEventType(ui::Event* event) {
+  return event->type() == ui::ET_MOUSE_MOVED ||
+         event->type() == ui::ET_MOUSE_DRAGGED ||
+         event->type() == ui::ET_TOUCH_MOVED;
+}
+
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// NativeViewportImpl, public:
 
 NativeViewportImpl::NativeViewportImpl(shell::Context* context,
                                        ScopedMessagePipeHandle pipe)
     : context_(context),
       widget_(gfx::kNullAcceleratedWidget),
+      waiting_for_event_ack_(false),
+      pending_event_timestamp_(0),
       client_(pipe.Pass()) {
   client_.SetPeer(this);
 }
@@ -23,6 +38,9 @@ NativeViewportImpl::NativeViewportImpl(shell::Context* context,
 NativeViewportImpl::~NativeViewportImpl() {
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// NativeViewportImpl, NativeViewportStub overrides:
+
 void NativeViewportImpl::Open() {
   native_viewport_ = services::NativeViewport::Create(context_, this);
   native_viewport_->Init();
@@ -40,18 +58,47 @@ void NativeViewportImpl::CreateGLES2Context(
   CreateGLES2ContextIfNeeded();
 }
 
-void NativeViewportImpl::CreateGLES2ContextIfNeeded() {
-  if (widget_ == gfx::kNullAcceleratedWidget || !gles2_)
-    return;
-  gles2_->CreateContext(widget_, native_viewport_->GetSize());
+void NativeViewportImpl::AckEvent(const Event& event) {
+  DCHECK_EQ(event.time_stamp(), pending_event_timestamp_);
+  waiting_for_event_ack_ = false;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// NativeViewportImpl, NativeViewportDelegate implementation:
+
+void NativeViewportImpl::OnResized(const gfx::Size& size) {
+}
+
+void NativeViewportImpl::OnAcceleratedWidgetAvailable(
+    gfx::AcceleratedWidget widget) {
+  widget_ = widget;
+  CreateGLES2ContextIfNeeded();
 }
 
 bool NativeViewportImpl::OnEvent(ui::Event* ui_event) {
+  // Must not return early before updating capture.
+  switch (ui_event->type()) {
+  case ui::ET_MOUSE_PRESSED:
+  case ui::ET_TOUCH_PRESSED:
+    native_viewport_->SetCapture();
+    break;
+  case ui::ET_MOUSE_RELEASED:
+  case ui::ET_TOUCH_RELEASED:
+    native_viewport_->ReleaseCapture();
+    break;
+  default:
+    break;
+  }
+
+  if (waiting_for_event_ack_ && IsRateLimitedEventType(ui_event))
+    return false;
+
   AllocationScope scope;
 
   Event::Builder event;
   event.set_action(ui_event->type());
-  event.set_time_stamp(ui_event->time_stamp().ToInternalValue());
+  pending_event_timestamp_ = ui_event->time_stamp().ToInternalValue();
+  event.set_time_stamp(pending_event_timestamp_);
 
   if (ui_event->IsMouseEvent() || ui_event->IsTouchEvent()) {
     ui::LocatedEvent* located_event = static_cast<ui::LocatedEvent*>(ui_event);
@@ -69,18 +116,10 @@ bool NativeViewportImpl::OnEvent(ui::Event* ui_event) {
   }
 
   client_->OnEvent(event.Finish());
+  waiting_for_event_ack_ = true;
   return false;
 }
 
-void NativeViewportImpl::OnAcceleratedWidgetAvailable(
-    gfx::AcceleratedWidget widget) {
-  widget_ = widget;
-  CreateGLES2ContextIfNeeded();
-}
-
-void NativeViewportImpl::OnResized(const gfx::Size& size) {
-}
-
 void NativeViewportImpl::OnDestroyed() {
   // TODO(beng):
   // Destroying |gles2_| on the shell thread here hits thread checker asserts.
@@ -94,5 +133,14 @@ void NativeViewportImpl::OnDestroyed() {
   client_->OnDestroyed();
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// NativeViewportImpl, private:
+
+void NativeViewportImpl::CreateGLES2ContextIfNeeded() {
+  if (widget_ == gfx::kNullAcceleratedWidget || !gles2_)
+    return;
+  gles2_->CreateContext(widget_, native_viewport_->GetSize());
+}
+
 }  // namespace services
 }  // namespace mojo