content/browser/accessibility/accessibility_mode_helper.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 "base/logging.h"
   6 #include "content/browser/accessibility/accessibility_mode_helper.h"
   7
   8 namespace content {
   9
  10 namespace {
  11
  12 AccessibilityMode CastToAccessibilityMode(unsigned int int_mode) {
  13   AccessibilityMode mode = static_cast<AccessibilityMode>(int_mode);
  14   switch (mode) {
  15   case AccessibilityModeOff:
  16   case AccessibilityModeComplete:
  17   case AccessibilityModeTreeOnly:
  18     return mode;
  19   }
  20   DCHECK(false) << "Could not convert to AccessibilityMode: " << int_mode;
  21   return AccessibilityModeOff;
  22 }
  23
  24 }  // namespace
  25
  26 AccessibilityMode GetBaseAccessibilityMode() {
  27   AccessibilityMode accessibility_mode = AccessibilityModeOff;
  28   return accessibility_mode;
  29 }
  30
  31 AccessibilityMode AddAccessibilityModeTo(AccessibilityMode to,
  32                                          AccessibilityMode mode_to_add) {
  33   return CastToAccessibilityMode(to | mode_to_add);
  34 }
  35
  36 AccessibilityMode RemoveAccessibilityModeFrom(
  37     AccessibilityMode from,
  38     AccessibilityMode mode_to_remove) {
  39   unsigned int new_mode = from ^ (mode_to_remove & from);
  40   return CastToAccessibilityMode(new_mode);
  41 }
  42
  43 }  // namespace content