src/chrome/browser/ui/webui/options/chromeos/power_handler.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 "chrome/browser/ui/webui/options/chromeos/power_handler.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/strings/string_number_conversions.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "base/values.h"
  12 #include "chrome/common/chrome_switches.h"
  13 #include "chrome/grit/generated_resources.h"
  14 #include "content/public/browser/web_ui.h"
  15 #include "grit/ash_resources.h"
  16 #include "ui/base/l10n/l10n_util.h"
  17 #include "ui/base/resource/resource_bundle.h"
  18 #include "ui/base/webui/web_ui_util.h"
  19 #include "ui/gfx/image/image_skia.h"
  20
  21 using ash::PowerStatus;
  22
  23 namespace chromeos {
  24 namespace options {
  25
  26 PowerHandler::PowerHandler() {
  27 }
  28
  29 PowerHandler::~PowerHandler() {
  30   if (switches::PowerOverlayEnabled())
  31     PowerStatus::Get()->RemoveObserver(this);
  32 }
  33
  34 void PowerHandler::GetLocalizedValues(
  35     base::DictionaryValue* localized_strings) {
  36   DCHECK(localized_strings);
  37   RegisterTitle(localized_strings, "powerOverlay",
  38                 IDS_OPTIONS_POWER_OVERLAY_TITLE);
  39   localized_strings->SetString(
  40       "batteryStatusLabel",
  41       l10n_util::GetStringUTF16(IDS_OPTIONS_BATTERY_STATUS_LABEL));
  42 }
  43
  44 void PowerHandler::InitializePage() {
  45   if (switches::PowerOverlayEnabled())
  46     PowerStatus::Get()->RequestStatusUpdate();
  47 }
  48
  49 void PowerHandler::RegisterMessages() {
  50   if (switches::PowerOverlayEnabled())
  51     PowerStatus::Get()->AddObserver(this);
  52
  53   // Callback to fetch the battery icon data.
  54   web_ui()->RegisterMessageCallback(
  55       "requestBatteryIcon",
  56       base::Bind(&PowerHandler::GetBatteryIcon, base::Unretained(this)));
  57 }
  58
  59 void PowerHandler::OnPowerStatusChanged() {
  60   web_ui()->CallJavascriptFunction(
  61       "options.PowerOverlay.setBatteryStatusText",
  62       base::StringValue(GetStatusValue()));
  63   web_ui()->CallJavascriptFunction(
  64       "options.BrowserOptions.setBatteryStatusText",
  65       base::StringValue(GetFullStatusText()));
  66 }
  67
  68 base::string16 PowerHandler::GetStatusValue() const {
  69   PowerStatus* status = PowerStatus::Get();
  70   if (!status->IsBatteryPresent())
  71     return base::string16();
  72
  73   bool charging = status->IsBatteryCharging();
  74   bool calculating = status->IsBatteryTimeBeingCalculated();
  75   int percent = status->GetRoundedBatteryPercent();
  76   base::TimeDelta time_left;
  77   bool show_time = false;
  78
  79   if (!calculating) {
  80     time_left = charging ? status->GetBatteryTimeToFull() :
  81                            status->GetBatteryTimeToEmpty();
  82     show_time = PowerStatus::ShouldDisplayBatteryTime(time_left);
  83   }
  84
  85   if (!show_time) {
  86     return l10n_util::GetStringFUTF16(IDS_OPTIONS_BATTERY_STATUS_SHORT,
  87                                       base::IntToString16(percent));
  88   } else {
  89     int hour = 0;
  90     int min = 0;
  91     PowerStatus::SplitTimeIntoHoursAndMinutes(time_left, &hour, &min);
  92     base::string16 minute_text = base::ASCIIToUTF16(min < 10 ? "0" : "") +
  93                                  base::IntToString16(min);
  94     return l10n_util::GetStringFUTF16(
  95         charging ? IDS_OPTIONS_BATTERY_STATUS_CHARGING :
  96                    IDS_OPTIONS_BATTERY_STATUS,
  97         base::IntToString16(percent),
  98         base::IntToString16(hour),
  99         minute_text);
 100   }
 101 }
 102
 103 base::string16 PowerHandler::GetFullStatusText() const {
 104   base::string16 status = GetStatusValue();
 105   if (status.empty())
 106     return base::string16();
 107   return l10n_util::GetStringFUTF16(
 108       IDS_OPTIONS_DEVICE_GROUP_BATTERY_STATUS_LABEL, status);
 109 }
 110
 111 void PowerHandler::GetBatteryIcon(const base::ListValue* args) {
 112   gfx::ImageSkia icon = PowerStatus::Get()->GetBatteryImage(
 113       ash::PowerStatus::ICON_DARK);
 114   gfx::ImageSkiaRep image_rep = icon.GetRepresentation(
 115       web_ui()->GetDeviceScaleFactor());
 116   web_ui()->CallJavascriptFunction(
 117       "options.BrowserOptions.setBatteryIcon",
 118       base::StringValue(webui::GetBitmapDataUrl(image_rep.sk_bitmap())));
 119 }
 120
 121 }  // namespace options
 122 }  // namespace chromeos