chrome/browser/ui/webui/chromeos/power_ui.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/chromeos/power_ui.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/compiler_specific.h"
  10 #include "base/strings/string_number_conversions.h"
  11 #include "base/time/time.h"
  12 #include "base/values.h"
  13 #include "chrome/browser/profiles/profile.h"
  14 #include "chrome/common/url_constants.h"
  15 #include "chromeos/power/power_data_collector.h"
  16 #include "content/public/browser/web_ui.h"
  17 #include "content/public/browser/web_ui_data_source.h"
  18 #include "content/public/browser/web_ui_message_handler.h"
  19 #include "grit/browser_resources.h"
  20 #include "grit/generated_resources.h"
  21
  22 namespace chromeos {
  23
  24 namespace {
  25
  26 const char kStringsJsFile[] = "strings.js";
  27 const char kRequestBatteryChargeDataCallback[] = "requestBatteryChargeData";
  28 const char kOnRequestBatteryChargeDataFunction[] =
  29     "powerUI.showBatteryChargeData";
  30
  31 class PowerMessageHandler : public content::WebUIMessageHandler {
  32  public:
  33   PowerMessageHandler();
  34   virtual ~PowerMessageHandler();
  35
  36   // WebUIMessageHandler implementation.
  37   virtual void RegisterMessages() OVERRIDE;
  38
  39  private:
  40   void OnGetBatteryChargeData(const base::ListValue* value);
  41 };
  42
  43 PowerMessageHandler::PowerMessageHandler() {
  44 }
  45
  46 PowerMessageHandler::~PowerMessageHandler() {
  47 }
  48
  49 void PowerMessageHandler::RegisterMessages() {
  50   web_ui()->RegisterMessageCallback(
  51       kRequestBatteryChargeDataCallback,
  52       base::Bind(&PowerMessageHandler::OnGetBatteryChargeData,
  53                  base::Unretained(this)));
  54 }
  55
  56 void PowerMessageHandler::OnGetBatteryChargeData(const base::ListValue* value) {
  57   const std::deque<PowerDataCollector::PowerSupplySnapshot>& power_supply =
  58       PowerDataCollector::Get()->power_supply_data();
  59   base::ListValue data;
  60
  61   for (unsigned int i = 0; i < power_supply.size(); ++i) {
  62     const PowerDataCollector::PowerSupplySnapshot& snapshot = power_supply[i];
  63     base::Time time = base::Time::Now() -
  64         (base::TimeTicks::Now() - snapshot.time);
  65     scoped_ptr<base::DictionaryValue> element(new base::DictionaryValue);
  66     element->SetDouble("battery_percent", snapshot.battery_percent);
  67     element->SetDouble("battery_discharge_rate",
  68                        snapshot.battery_discharge_rate);
  69     element->SetBoolean("external_power", snapshot.external_power);
  70     element->SetDouble("time", time.ToJsTime());
  71
  72     data.Append(element.release());
  73   }
  74
  75   web_ui()->CallJavascriptFunction(kOnRequestBatteryChargeDataFunction, data);
  76 }
  77
  78 }  // namespace
  79
  80 PowerUI::PowerUI(content::WebUI* web_ui) : content::WebUIController(web_ui) {
  81   web_ui->AddMessageHandler(new PowerMessageHandler());
  82
  83   content::WebUIDataSource* html =
  84       content::WebUIDataSource::Create(chrome::kChromeUIPowerHost);
  85   html->SetUseJsonJSFormatV2();
  86
  87   html->AddLocalizedString("titleText", IDS_ABOUT_POWER_TITLE);
  88   html->AddLocalizedString("reloadButton", IDS_ABOUT_POWER_RELOAD_BUTTON);
  89   html->AddLocalizedString("batteryChargePercentageHeader",
  90                            IDS_ABOUT_POWER_BATTERY_CHARGE_PERCENTAGE_HEADER);
  91   html->AddLocalizedString("batteryDischargeRateHeader",
  92                            IDS_ABOUT_POWER_BATTERY_DISCHARGE_RATE_HEADER);
  93   html->AddLocalizedString("negativeDischargeRateInfo",
  94                            IDS_ABOUT_POWER_NEGATIVE_DISCHARGE_RATE_INFO);
  95   html->AddLocalizedString("notEnoughDataAvailableYet",
  96                            IDS_ABOUT_POWER_NOT_ENOUGH_DATA);
  97   html->AddLocalizedString("timeAndPlotDataMismatch",
  98                            IDS_ABOUT_POWER_TIME_AND_PLOT_DATA_MISMATCH);
  99   html->SetJsonPath(kStringsJsFile);
 100
 101   html->AddResourcePath("power.css", IDR_ABOUT_POWER_CSS);
 102   html->AddResourcePath("power.js", IDR_ABOUT_POWER_JS);
 103   html->SetDefaultResource(IDR_ABOUT_POWER_HTML);
 104
 105   Profile* profile = Profile::FromWebUI(web_ui);
 106   content::WebUIDataSource::Add(profile, html);
 107 }
 108
 109 PowerUI::~PowerUI() {
 110 }
 111
 112 }  // namespace chromeos