ui/events/ozone/evdev/mouse_button_map_evdev.cc

   1 // Copyright 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/evdev/mouse_button_map_evdev.h"
   6
   7 #include <linux/input.h>
   8
   9 #include "base/logging.h"
  10
  11 namespace ui {
  12
  13 namespace {
  14
  15 // Defines the range of button codes that we support.
  16 //
  17 // Check linux/input.h for more info.
  18 const MouseButtonMapEvdev::Button kMinMouseButtonCode = BTN_MISC;
  19 const MouseButtonMapEvdev::Button kMaxMouseButtonCode = BTN_GEAR_UP;
  20
  21 bool IsMouseButton(const MouseButtonMapEvdev::Button button) {
  22   return (button >= kMinMouseButtonCode && button <= kMaxMouseButtonCode);
  23 }
  24
  25 }  // namespace
  26
  27 MouseButtonMapEvdev::MouseButtonMapEvdev() {
  28   ResetButtonMap();
  29 }
  30
  31 MouseButtonMapEvdev::~MouseButtonMapEvdev() {
  32 }
  33
  34 void MouseButtonMapEvdev::UpdateButtonMap(Button button_from,
  35                                           Button button_to) {
  36   DCHECK(IsMouseButton(button_from) && IsMouseButton(button_to));
  37   button_map_[button_from] = button_to;
  38 }
  39
  40 void MouseButtonMapEvdev::ResetButtonMap() {
  41   button_map_.clear();
  42   for (Button i = kMinMouseButtonCode; i <= kMaxMouseButtonCode; ++i)
  43     button_map_[i] = i;
  44 }
  45
  46 int MouseButtonMapEvdev::GetMappedButton(const Button button) const {
  47   ButtonMap::const_iterator it = button_map_.find(button);
  48   DCHECK(it != button_map_.end());
  49   return it->second;
  50 }
  51
  52 }  // namespace ui