chromeos: moves setting of touch state to a separate class

ui/display/manager/chromeos/touch_transform_controller.h

Index: ui/display/manager/chromeos/touch_transform_controller.h
diff --git a/ui/display/manager/chromeos/touch_transform_controller.h b/ui/display/manager/chromeos/touch_transform_controller.h
index b911a311feceb45e95405369a7ed8319f2a3e96e..69239bc5301dd7e74058b4948f8d71e40d38e3f0 100644
--- a/ui/display/manager/chromeos/touch_transform_controller.h
+++ b/ui/display/manager/chromeos/touch_transform_controller.h
@@ -5,6 +5,10 @@
 #ifndef UI_DISPLAY_MANAGER_CHROMEOS_TOUCH_TRANSFORM_CONTROLLER_H_
 #define UI_DISPLAY_MANAGER_CHROMEOS_TOUCH_TRANSFORM_CONTROLLER_H_
 
+#include <map>
+#include <memory>
+#include <vector>
+
 #include "base/macros.h"
 #include "ui/display/manager/display_manager_export.h"
 #include "ui/gfx/geometry/size.h"
@@ -20,6 +24,9 @@ namespace display {
 class DisplayConfigurator;
 class DisplayManager;
 class ManagedDisplayInfo;
+class TouchTransformSetter;
+
+struct TouchDeviceTransform;
 
 namespace test {
 class TouchTransformControllerTest;
@@ -31,7 +38,8 @@ class TouchTransformControllerTest;
 class DISPLAY_MANAGER_EXPORT TouchTransformController {
  public:
   TouchTransformController(DisplayConfigurator* display_configurator,
-                           DisplayManager* display_manager);
+                           DisplayManager* display_manager,
+                           std::unique_ptr<TouchTransformSetter> setter);
   ~TouchTransformController();
 
   // Updates the transform for touch input-devices and pushes the new transforms
@@ -45,6 +53,17 @@ class DISPLAY_MANAGER_EXPORT TouchTransformController {
  private:
   friend class test::TouchTransformControllerTest;
 
+  // Contains the data that is passed to TouchTransformSetter.
+  struct UpdateData {
+    UpdateData();
+    ~UpdateData();
+
+    std::map<int32_t, double> device_to_scale;
+    std::vector<TouchDeviceTransform> touch_device_transforms;
+  };
+
+  void UpdateTouchTransforms(UpdateData* data) const;
+
   // Returns a transform that will be used to change an event's location from
   // the touchscreen's coordinate system into |display|'s coordinate system.
   // The transform is also responsible for properly scaling the display if the
@@ -66,20 +85,23 @@ class DISPLAY_MANAGER_EXPORT TouchTransformController {
       const ManagedDisplayInfo& touch_display,
       const ui::TouchscreenDevice& touch_device) const;
 
-  // For the provided |display| update the touch radius mapping.
-  void UpdateTouchRadius(const ManagedDisplayInfo& display) const;
+  // For the provided |display| update the touch radius mapping in
+  // |update_data|.
+  void UpdateTouchRadius(const ManagedDisplayInfo& display,
+                         UpdateData* update_data) const;
 
   // For a given |target_display| and |target_display_id| update the touch
-  // transformation based on the touchscreen associated with |touch_display|.
-  // |target_display_id| is the display id whose root window will receive the
-  // touch events.
+  // transformation in |update_data| based on the touchscreen associated with
+  // |touch_display|. |target_display_id| is the display id to update the
+  // transform for.
   // |touch_display| is the physical display that has the touchscreen
   // from which the events arrive.
   // |target_display| provides the dimensions to which the touch event will be
   // transformed.
   void UpdateTouchTransform(int64_t target_display_id,
                             const ManagedDisplayInfo& touch_display,
-                            const ManagedDisplayInfo& target_display) const;
+                            const ManagedDisplayInfo& target_display,
+                            UpdateData* update_data) const;
 
   // Both |display_configurator_| and |display_manager_| are not owned and must
   // outlive TouchTransformController.
@@ -88,6 +110,8 @@ class DISPLAY_MANAGER_EXPORT TouchTransformController {
 
   bool is_calibrating_ = false;
 
+  std::unique_ptr<TouchTransformSetter> setter_;
+
   DISALLOW_COPY_AND_ASSIGN(TouchTransformController);
 };