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