ui/events/ozone/chromeos/cursor_controller.cc

   1 // Copyright (c) 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/events/ozone/chromeos/cursor_controller.h"
   6
   7 namespace ui {
   8
   9 namespace {
  10
  11 void TransformCursorMove(gfx::Display::Rotation rotation,
  12                          float scale,
  13                          gfx::Vector2dF* delta) {
  14   float dx;
  15   float dy;
  16
  17   switch (rotation) {
  18     case gfx::Display::ROTATE_90:
  19       dx = -delta->y();
  20       dy = delta->x();
  21       break;
  22     case gfx::Display::ROTATE_180:
  23       dx = -delta->x();
  24       dy = -delta->y();
  25       break;
  26     case gfx::Display::ROTATE_270:
  27       dx = delta->y();
  28       dy = -delta->x();
  29       break;
  30     default:  // gfx::Display::ROTATE_0
  31       dx = delta->x();
  32       dy = delta->y();
  33       break;
  34   }
  35
  36   delta->set_x(dx * scale);
  37   delta->set_y(dy * scale);
  38 }
  39
  40 }  // namespace
  41
  42 // static
  43 CursorController* CursorController::GetInstance() {
  44   return Singleton<CursorController>::get();
  45 }
  46
  47 void CursorController::SetCursorConfigForWindow(gfx::AcceleratedWidget widget,
  48                                                 gfx::Display::Rotation rotation,
  49                                                 float scale) {
  50   base::AutoLock lock(window_to_cursor_configuration_map_lock_);
  51   PerWindowCursorConfiguration config = {rotation, scale};
  52   window_to_cursor_configuration_map_[widget] = config;
  53 }
  54
  55 void CursorController::ClearCursorConfigForWindow(
  56     gfx::AcceleratedWidget widget) {
  57   window_to_cursor_configuration_map_.erase(widget);
  58 }
  59
  60 void CursorController::ApplyCursorConfigForWindow(gfx::AcceleratedWidget widget,
  61                                                   gfx::Vector2dF* delta) const {
  62   base::AutoLock lock(window_to_cursor_configuration_map_lock_);
  63   auto it = window_to_cursor_configuration_map_.find(widget);
  64   if (it != window_to_cursor_configuration_map_.end())
  65     TransformCursorMove(it->second.rotation, it->second.scale, delta);
  66 }
  67
  68 CursorController::CursorController() {
  69 }
  70
  71 CursorController::~CursorController() {
  72 }
  73
  74 }  // namespace ui