1 files changed, 92 insertions, 0 deletions
diff --git a/chromium/ash/wm/gestures/shelf_gesture_handler.cc b/chromium/ash/wm/gestures/shelf_gesture_handler.cc
new file mode 100644
index 00000000000..f9fb1b8d43c
--- /dev/null
+++ b/chromium/ash/wm/gestures/shelf_gesture_handler.cc
@@ -0,0 +1,92 @@
+// 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 "ash/wm/gestures/shelf_gesture_handler.h"
+
+#include "ash/root_window_controller.h"
+#include "ash/session_state_delegate.h"
+#include "ash/shelf/shelf_layout_manager.h"
+#include "ash/shelf/shelf_types.h"
+#include "ash/shelf/shelf_widget.h"
+#include "ash/shell.h"
+#include "ash/system/status_area_widget.h"
+#include "ash/wm/gestures/tray_gesture_handler.h"
+#include "ash/wm/window_state.h"
+#include "ash/wm/window_util.h"
+#include "ui/aura/window.h"
+#include "ui/compositor/layer.h"
+#include "ui/compositor/scoped_layer_animation_settings.h"
+#include "ui/gfx/transform.h"
+#include "ui/views/widget/widget.h"
+
+namespace ash {
+namespace internal {
+
+ShelfGestureHandler::ShelfGestureHandler()
+    : drag_in_progress_(false) {
+}
+
+ShelfGestureHandler::~ShelfGestureHandler() {
+}
+
+bool ShelfGestureHandler::ProcessGestureEvent(const ui::GestureEvent& event) {
+  Shell* shell = Shell::GetInstance();
+  if (!shell->session_state_delegate()->NumberOfLoggedInUsers() ||
+      shell->session_state_delegate()->IsScreenLocked()) {
+    // The gestures are disabled in the lock/login screen.
+    return false;
+  }
+
+  // TODO(oshima): Find the root window controller from event's location.
+  RootWindowController* controller = Shell::GetPrimaryRootWindowController();
+
+  ShelfLayoutManager* shelf = controller->GetShelfLayoutManager();
+
+  const aura::Window* fullscreen = controller->GetWindowForFullscreenMode();
+  if (fullscreen &&
+      ash::wm::GetWindowState(fullscreen)->hide_shelf_when_fullscreen()) {
+    return false;
+  }
+
+  if (event.type() == ui::ET_GESTURE_SCROLL_BEGIN) {
+    drag_in_progress_ = true;
+    shelf->StartGestureDrag(event);
+    return true;
+  }
+
+  if (!drag_in_progress_)
+    return false;
+
+  if (event.type() == ui::ET_GESTURE_SCROLL_UPDATE) {
+    if (tray_handler_) {
+      if (!tray_handler_->UpdateGestureDrag(event))
+        tray_handler_.reset();
+    } else if (shelf->UpdateGestureDrag(event) ==
+        ShelfLayoutManager::DRAG_TRAY) {
+      tray_handler_.reset(new TrayGestureHandler());
+    }
+
+    return true;
+  }
+
+  drag_in_progress_ = false;
+
+  if (event.type() == ui::ET_GESTURE_SCROLL_END ||
+      event.type() == ui::ET_SCROLL_FLING_START) {
+    if (tray_handler_) {
+      tray_handler_->CompleteGestureDrag(event);
+      tray_handler_.reset();
+    }
+
+    shelf->CompleteGestureDrag(event);
+    return true;
+  }
+
+  // Unexpected event. Reset the state and let the event fall through.
+  shelf->CancelGestureDrag();
+  return false;
+}
+
+}  // namespace internal
+}  // namespace ash