ui/display/chromeos/display_util.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/display/chromeos/display_util.h"
   6
   7 #include "base/logging.h"
   8 #include "base/strings/string_number_conversions.h"
   9 #include "base/strings/stringprintf.h"
  10 #include "ui/display/types/display_snapshot.h"
  11
  12 namespace ui {
  13
  14 std::string DisplayPowerStateToString(chromeos::DisplayPowerState state) {
  15   switch (state) {
  16     case chromeos::DISPLAY_POWER_ALL_ON:
  17       return "ALL_ON";
  18     case chromeos::DISPLAY_POWER_ALL_OFF:
  19       return "ALL_OFF";
  20     case chromeos::DISPLAY_POWER_INTERNAL_OFF_EXTERNAL_ON:
  21       return "INTERNAL_OFF_EXTERNAL_ON";
  22     case chromeos::DISPLAY_POWER_INTERNAL_ON_EXTERNAL_OFF:
  23       return "INTERNAL_ON_EXTERNAL_OFF";
  24     default:
  25       return "unknown (" + base::IntToString(state) + ")";
  26   }
  27 }
  28
  29 std::string MultipleDisplayStateToString(MultipleDisplayState state) {
  30   switch (state) {
  31     case MULTIPLE_DISPLAY_STATE_INVALID:
  32       return "INVALID";
  33     case MULTIPLE_DISPLAY_STATE_HEADLESS:
  34       return "HEADLESS";
  35     case MULTIPLE_DISPLAY_STATE_SINGLE:
  36       return "SINGLE";
  37     case MULTIPLE_DISPLAY_STATE_DUAL_MIRROR:
  38       return "DUAL_MIRROR";
  39     case MULTIPLE_DISPLAY_STATE_DUAL_EXTENDED:
  40       return "DUAL_EXTENDED";
  41     case MULTIPLE_DISPLAY_STATE_MULTI_EXTENDED:
  42       return "MULTI_EXTENDED";
  43   }
  44   NOTREACHED() << "Unknown state " << state;
  45   return "INVALID";
  46 }
  47
  48 int GetDisplayPower(const std::vector<DisplaySnapshot*>& displays,
  49                     chromeos::DisplayPowerState state,
  50                     std::vector<bool>* display_power) {
  51   int num_on_displays = 0;
  52   if (display_power)
  53     display_power->resize(displays.size());
  54
  55   for (size_t i = 0; i < displays.size(); ++i) {
  56     bool internal = displays[i]->type() == DISPLAY_CONNECTION_TYPE_INTERNAL;
  57     bool on =
  58         state == chromeos::DISPLAY_POWER_ALL_ON ||
  59         (state == chromeos::DISPLAY_POWER_INTERNAL_OFF_EXTERNAL_ON &&
  60          !internal) ||
  61         (state == chromeos::DISPLAY_POWER_INTERNAL_ON_EXTERNAL_OFF && internal);
  62     if (display_power)
  63       (*display_power)[i] = on;
  64     if (on)
  65       num_on_displays++;
  66   }
  67   return num_on_displays;
  68 }
  69
  70 }  // namespace ui