Don't move cursor location when rotation /ui scaling has changed

ash/display/display_manager_unittest.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 "ash/display/display_manager.h"
 
 #include "ash/display/display_controller.h"
 #include "ash/screen_ash.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
@@ skipping 730 matching lines @@
   display_manager()->SetDisplayUIScale(display_id, 1.125f);
   EXPECT_EQ(1.125f, GetDisplayInfoAt(0).ui_scale());
   display_manager()->SetDisplayUIScale(display_id, 0.8f);
   EXPECT_EQ(0.8f, GetDisplayInfoAt(0).ui_scale());
   display_manager()->SetDisplayUIScale(display_id, 0.625f);
   EXPECT_EQ(0.625f, GetDisplayInfoAt(0).ui_scale());
   display_manager()->SetDisplayUIScale(display_id, 0.5f);
   EXPECT_EQ(0.5f, GetDisplayInfoAt(0).ui_scale());
 }
 
+TEST_F(DisplayManagerTest, UpdateMouseCursorAfterRotateZoom) {
+  // Make sure just rotating will not change native location.
+  UpdateDisplay("300x200,200x150");
+  Shell::RootWindowList root_windows = Shell::GetAllRootWindows();
+  aura::Env* env = aura::Env::GetInstance();
+
+  // Test on 1st display.
+  root_windows[0]->MoveCursorTo(gfx::Point(150, 50));
+  EXPECT_EQ("150,50", env->last_mouse_location().ToString());
+  UpdateDisplay("300x200/r,200x150");
+  EXPECT_EQ("50,149", env->last_mouse_location().ToString());
+
+  // Test on 2nd display.
+  root_windows[1]->MoveCursorTo(gfx::Point(50, 100));
+  EXPECT_EQ("250,100", env->last_mouse_location().ToString());
+  UpdateDisplay("300x200/r,200x150/l");
+  EXPECT_EQ("249,50", env->last_mouse_location().ToString());
+
+  // Make sure just zooming will not change native location.
+  UpdateDisplay("600x400*2,400x300");
+
+  // Test on 1st display.
+  root_windows[0]->MoveCursorTo(gfx::Point(100, 150));
+  EXPECT_EQ("100,150", env->last_mouse_location().ToString());
+  UpdateDisplay("600x400*2@1.5,400x300");
+  EXPECT_EQ("150,225", env->last_mouse_location().ToString());
+
+  // Test on 2nd display.
+  UpdateDisplay("600x400,400x300*2");
+  root_windows[1]->MoveCursorTo(gfx::Point(100, 50));
+  EXPECT_EQ("700,50", env->last_mouse_location().ToString());
+  UpdateDisplay("600x400,400x300*2@1.5");
+  EXPECT_EQ("750,75", env->last_mouse_location().ToString());
+}
+
 }  // namespace internal
 }  // namespace ash