// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/chromeos/status/network_menu_icon.h"

#include <algorithm>
#include <cmath>

#include "base/utf_string_conversions.h"
#include "chrome/browser/chromeos/accessibility/accessibility_util.h"
#include "chrome/browser/chromeos/cros/cros_library.h"
#include "grit/generated_resources.h"
#include "grit/theme_resources.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/skbitmap_operations.h"

using std::max;
using std::min;

namespace chromeos {

namespace {

// Amount to fade icons while connecting.
const double kConnectingImageAlpha = 0.5;

// Animation cycle length.
const int kThrobDurationMs = 750;

// Images for strength bars for wired networks.
const int kNumBarsImages = 5;
SkBitmap* kBarsImagesAnimatingDark[kNumBarsImages - 1];
SkBitmap* kBarsImagesAnimatingLight[kNumBarsImages - 1];

// Imagaes for strength arcs for wireless networks.
const int kNumArcsImages = 5;
SkBitmap* kArcsImagesAnimatingDark[kNumArcsImages - 1];
SkBitmap* kArcsImagesAnimatingLight[kNumArcsImages - 1];

// Badge offsets.  If a badge is large enough that it won't fit within the icon
// when using the right or bottom offset, it gets shifted inwards so it will.
const int kBadgeLeftX = 0;
const int kBadgeRightX = 14;
const int kBadgeTopY = 0;
const int kBadgeBottomY = 14;

// ID for VPN badge. TODO(stevenjb): replace with correct icon when available.
const int kVpnBadgeId = IDR_STATUSBAR_NETWORK_SECURE;

int StrengthIndex(int strength, int count) {
  if (strength == 0) {
    return 0;
  } else {
    // Return an index in the range [1, count].
    const float findex = (static_cast<float>(strength) / 100.0f) *
        nextafter(static_cast<float>(count), 0);
    int index = 1 + static_cast<int>(findex);
    index = max(min(index, count), 1);
    return index;
  }
}

int WifiStrengthIndex(const WifiNetwork* wifi) {
  return StrengthIndex(wifi->strength(), kNumArcsImages - 1);
}

int CellularStrengthIndex(const CellularNetwork* cellular) {
  if (cellular->data_left() == CellularNetwork::DATA_NONE)
    return 0;
  else
    return StrengthIndex(cellular->strength(), kNumBarsImages - 1);
}

const SkBitmap* BadgeForNetworkTechnology(const CellularNetwork* cellular) {
  const int kUnknownBadgeType = -1;
  int id = kUnknownBadgeType;
  switch (cellular->network_technology()) {
    case NETWORK_TECHNOLOGY_EVDO:
      switch (cellular->data_left()) {
        case CellularNetwork::DATA_NONE:
          id = IDR_STATUSBAR_NETWORK_3G_ERROR;
          break;
        case CellularNetwork::DATA_VERY_LOW:
        case CellularNetwork::DATA_LOW:
        case CellularNetwork::DATA_NORMAL:
          id = IDR_STATUSBAR_NETWORK_3G;
          break;
        case CellularNetwork::DATA_UNKNOWN:
          id = IDR_STATUSBAR_NETWORK_3G_UNKNOWN;
          break;
      }
      break;
    case NETWORK_TECHNOLOGY_1XRTT:
      switch (cellular->data_left()) {
        case CellularNetwork::DATA_NONE:
          id = IDR_STATUSBAR_NETWORK_1X_ERROR;
          break;
        case CellularNetwork::DATA_VERY_LOW:
        case CellularNetwork::DATA_LOW:
        case CellularNetwork::DATA_NORMAL:
          id = IDR_STATUSBAR_NETWORK_1X;
          break;
        case CellularNetwork::DATA_UNKNOWN:
          id = IDR_STATUSBAR_NETWORK_1X_UNKNOWN;
          break;
      }
      break;
      // Note: we may not be able to obtain data usage info from GSM carriers,
      // so there may not be a reason to create _ERROR or _UNKNOWN versions
      // of the following icons.
    case NETWORK_TECHNOLOGY_GPRS:
      id = IDR_STATUSBAR_NETWORK_GPRS;
      break;
    case NETWORK_TECHNOLOGY_EDGE:
      id = IDR_STATUSBAR_NETWORK_EDGE;
      break;
    case NETWORK_TECHNOLOGY_UMTS:
      id = IDR_STATUSBAR_NETWORK_3G;
      break;
    case NETWORK_TECHNOLOGY_HSPA:
      id = IDR_STATUSBAR_NETWORK_HSPA;
      break;
    case NETWORK_TECHNOLOGY_HSPA_PLUS:
      id = IDR_STATUSBAR_NETWORK_HSPA_PLUS;
      break;
    case NETWORK_TECHNOLOGY_LTE:
      id = IDR_STATUSBAR_NETWORK_LTE;
      break;
    case NETWORK_TECHNOLOGY_LTE_ADVANCED:
      id = IDR_STATUSBAR_NETWORK_LTE_ADVANCED;
      break;
    case NETWORK_TECHNOLOGY_GSM:
      id = IDR_STATUSBAR_NETWORK_GPRS;
      break;
    case NETWORK_TECHNOLOGY_UNKNOWN:
      break;
  }
  if (id == kUnknownBadgeType)
    return NULL;
  else
    return ResourceBundle::GetSharedInstance().GetBitmapNamed(id);
}

// Generates a single empty vpn image for blending.
const SkBitmap& GetEmptyVpnBadge() {
  static SkBitmap* empty_vpn_badge = NULL;
  if (empty_vpn_badge == NULL) {
    empty_vpn_badge = new SkBitmap();
    ResourceBundle& rb = ResourceBundle::GetSharedInstance();
    const SkBitmap* vpn_badge = rb.GetBitmapNamed(kVpnBadgeId);
    empty_vpn_badge->setConfig(SkBitmap::kARGB_8888_Config,
                               vpn_badge->width(),
                               vpn_badge->height());
    empty_vpn_badge->allocPixels();
    empty_vpn_badge->eraseARGB(0, 0, 0, 0);
  }
  return *empty_vpn_badge;
}

const SkBitmap GetVpnResource(int resource_id) {
  ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
  const SkBitmap* ethernet_icon = rb.GetBitmapNamed(resource_id);
  gfx::Canvas canvas(
      gfx::Size(ethernet_icon->width(), ethernet_icon->height()), false);
  canvas.DrawBitmapInt(*ethernet_icon, 0, 0);
  const SkBitmap* vpn_badge = rb.GetBitmapNamed(kVpnBadgeId);
  canvas.DrawBitmapInt(*vpn_badge, kBadgeLeftX, kBadgeBottomY);
  return canvas.ExtractBitmap();
}

}  // namespace

////////////////////////////////////////////////////////////////////////////////
// NetworkIcon
// TODO(stevenjb): Separate class implementation from the definition.

// Sets up and generates an SkBitmap for a Network icon.
class NetworkIcon {
 public:
  // Default constructor is used by the status bar icon (NetworkMenuIcon).
  explicit NetworkIcon(NetworkMenuIcon::ResourceColorTheme color)
      : state_(STATE_UNKNOWN),
        resource_color_theme_(color),
        strength_index_(-1),
        top_left_badge_(NULL),
        top_right_badge_(NULL),
        bottom_left_badge_(NULL),
        bottom_right_badge_(NULL),
        is_status_bar_(true),
        connected_network_(NULL),
        roaming_state_(ROAMING_STATE_UNKNOWN) {
  }

  // Service path constructor for cached network service icons.
  NetworkIcon(const std::string& service_path,
              NetworkMenuIcon::ResourceColorTheme color)
      : service_path_(service_path),
        state_(STATE_UNKNOWN),
        resource_color_theme_(color),
        strength_index_(-1),
        top_left_badge_(NULL),
        top_right_badge_(NULL),
        bottom_left_badge_(NULL),
        bottom_right_badge_(NULL),
        is_status_bar_(false),
        connected_network_(NULL),
        roaming_state_(ROAMING_STATE_UNKNOWN) {
  }

  ~NetworkIcon() {
  }

  // Resets the icon state.
  void ClearIconAndBadges() {
    icon_ = SkBitmap();
    top_left_badge_ = NULL;
    top_right_badge_ = NULL;
    bottom_left_badge_ = NULL;
    bottom_right_badge_ = NULL;
  }

  // Resets the saved state to force an update.
  void SetDirty() {
    state_ = STATE_UNKNOWN;
    strength_index_ = -1;
  }

  // Determines whether or not the associated network might be dirty and if so
  // updates and generates the icon. Does nothing if network no longer exists.
  void Update() {
    chromeos::NetworkLibrary* cros =
        chromeos::CrosLibrary::Get()->GetNetworkLibrary();
    // First look for a visible network.
    const Network* network = cros->FindNetworkByPath(service_path_);
    if (!network) {
      // If not a visible network, check for a remembered network.
      network = cros->FindRememberedNetworkByPath(service_path_);
      if (!network) {
        LOG(WARNING) << "Unable to find network:" << service_path_;
        return;
      }
    }

    // Determine whether or not we need to update the icon.
    bool dirty = bitmap_.empty();
    bool speak = false;
    if (accessibility::IsSpokenFeedbackEnabled()) {
      if ((Network::IsConnectedState(state_) && !network->connected()) ||
          (Network::IsConnectingState(state_) && !network->connecting()) ||
          (Network::IsDisconnectedState(state_) && !network->disconnected())) {
        speak = true;
      }
    }

    // If the network state has changed, the icon needs updating.
    if (state_ != network->state()) {
      state_ = network->state();
      dirty = true;
    }

    ConnectionType type = network->type();
    if (type == TYPE_WIFI || type == TYPE_CELLULAR) {
      if (UpdateWirelessStrengthIndex(network))
        dirty = true;
    }

    if (type == TYPE_CELLULAR) {
      if (UpdateCellularState(network))
        dirty = true;
    }

    if (type == TYPE_VPN) {
      if (cros->connected_network() != connected_network_) {
        connected_network_ = cros->connected_network();
        dirty = true;
      }
    }

    if (dirty) {
      // Set the icon and badges based on the network.
      UpdateIcon(network);
      // Generate the bitmap from the icon.
      GenerateBitmap();
    }

    if (speak) {
      AccessabilitySpeak(network);
    }
  }

  // Sets up the base icon image.
  void SetIcon(const Network* network) {
    ResourceBundle& rb = ResourceBundle::GetSharedInstance();

    switch (network->type()) {
      case TYPE_ETHERNET: {
        icon_ = *rb.GetBitmapNamed(IDR_STATUSBAR_WIRED);
        break;
      }
      case TYPE_WIFI: {
        const WifiNetwork* wifi =
            static_cast<const WifiNetwork*>(network);
        if (strength_index_ == -1)
          strength_index_ = WifiStrengthIndex(wifi);
        icon_ = NetworkMenuIcon::GetBitmap(
            NetworkMenuIcon::ARCS, strength_index_, resource_color_theme_);
        break;
      }
      case TYPE_CELLULAR: {
        const CellularNetwork* cellular =
            static_cast<const CellularNetwork*>(network);
        if (strength_index_ == -1)
          strength_index_ = CellularStrengthIndex(cellular);
        icon_ = NetworkMenuIcon::GetBitmap(
            NetworkMenuIcon::BARS, strength_index_, resource_color_theme_);
        break;
      }
      case TYPE_VPN: {
        icon_ = *rb.GetBitmapNamed(IDR_STATUSBAR_VPN);
        break;
      }
      default: {
        LOG(WARNING) << "Request for icon for unsupported type: "
                     << network->type();
        icon_ = *rb.GetBitmapNamed(IDR_STATUSBAR_WIRED);
        break;
      }
    }
  }

  // Sets up the various badges:
  // top_left: cellular roaming
  // top_right: libcros warning
  // bottom_left: VPN
  // bottom_right: disconnected / secure / technology / warning
  void SetBadges(const Network* network) {
    ResourceBundle& rb = ResourceBundle::GetSharedInstance();
    chromeos::NetworkLibrary* cros =
        chromeos::CrosLibrary::Get()->GetNetworkLibrary();

    switch (network->type()) {
      case TYPE_ETHERNET: {
        if (network->disconnected()) {
          bottom_right_badge_ =
              rb.GetBitmapNamed(IDR_STATUSBAR_NETWORK_DISCONNECTED);
        }
        break;
      }
      case TYPE_WIFI: {
        const WifiNetwork* wifi =
            static_cast<const WifiNetwork*>(network);
        if (wifi->encrypted() && !is_status_bar_)
          bottom_right_badge_ = rb.GetBitmapNamed(IDR_STATUSBAR_NETWORK_SECURE);
        break;
      }
      case TYPE_CELLULAR: {
        const CellularNetwork* cellular =
            static_cast<const CellularNetwork*>(network);
        if (cellular->roaming_state() == ROAMING_STATE_ROAMING &&
            !cros->IsCellularAlwaysInRoaming()) {
          // For cellular that always in roaming don't show roaming badge.
          top_left_badge_ = rb.GetBitmapNamed(IDR_STATUSBAR_NETWORK_ROAMING);
        }
        if (!cellular->connecting())
          bottom_right_badge_ = BadgeForNetworkTechnology(cellular);
        break;
      }
      default:
        break;
    }
    // Display warning badge if cros is not loaded.
    if (is_status_bar_&& !CrosLibrary::Get()->load_error_string().empty())
      top_right_badge_ = rb.GetBitmapNamed(IDR_STATUSBAR_NETWORK_WARNING);
  }

  // Clears any previous state then sets the base icon and badges.
  void UpdateIcon(const Network* network) {
    ResourceBundle& rb = ResourceBundle::GetSharedInstance();
    chromeos::NetworkLibrary* cros =
        chromeos::CrosLibrary::Get()->GetNetworkLibrary();

    ClearIconAndBadges();

    if (network->type() != TYPE_VPN) {
      SetIcon(network);
      SetBadges(network);
      return;
    }

    // VPN should never be the primiary active network. This is used for
    // the icon next to a connected or disconnected VPN.
    const Network* connected_network = cros->connected_network();
    if (connected_network && connected_network->type() != TYPE_VPN) {
      // Set the icon and badges for the connected network.
      SetIcon(connected_network);
      SetBadges(connected_network);
    } else {
      // Use the ethernet icon for VPN when not connected.
      icon_ = *rb.GetBitmapNamed(IDR_STATUSBAR_WIRED);
      // We can be connected to a VPN, even when there is no connected
      // underlying network. In that case, for the status bar, show the
      // disconnected badge.
      if (is_status_bar_) {
        bottom_right_badge_ =
            rb.GetBitmapNamed(IDR_STATUSBAR_NETWORK_DISCONNECTED);
      }
    }
    // Overlay the VPN badge.
    bottom_left_badge_ = rb.GetBitmapNamed(kVpnBadgeId);
  }

  // Generates the bitmap. Call after setting the icon and badges.
  void GenerateBitmap() {
    if (icon_.empty())
      return;

    bitmap_ = NetworkMenuIcon::GenerateBitmapFromComponents(
        icon_,
        top_left_badge_,
        top_right_badge_,
        bottom_left_badge_,
        bottom_right_badge_);
  }

  const SkBitmap GetBitmap() const { return bitmap_; }

  void set_icon(const SkBitmap& icon) { icon_ = icon; }
  void set_top_left_badge(const SkBitmap* badge) {
    top_left_badge_ = badge;
  }
  void set_top_right_badge(const SkBitmap* badge) {
    top_right_badge_ = badge;
  }
  void set_bottom_left_badge(const SkBitmap* badge) {
    bottom_left_badge_ = badge;
  }
  void set_bottom_right_badge(const SkBitmap* badge) {
    bottom_right_badge_ = badge;
  }

 private:
  // Updates strength_index_ for wifi or cellular networks.
  // Returns true if strength_index_ changed.
  bool UpdateWirelessStrengthIndex(const Network* network) {
    bool dirty = false;
    ConnectionType type = network->type();
    int index = 0;
    if (type == TYPE_WIFI) {
      index = WifiStrengthIndex(
          static_cast<const WifiNetwork*>(network));
    } else if (type == TYPE_CELLULAR) {
      index = CellularStrengthIndex(
          static_cast<const CellularNetwork*>(network));
    }
    if (index != strength_index_) {
      strength_index_ = index;
      dirty = true;
    }
    return dirty;
  }

  // Updates the local state for cellular networks.
  bool UpdateCellularState(const Network* network) {
    if (network->type() != TYPE_CELLULAR)
      return false;
    bool dirty = false;
    const CellularNetwork* cellular =
        static_cast<const CellularNetwork*>(network);
    const SkBitmap* technology_badge = BadgeForNetworkTechnology(cellular);
    if (technology_badge != bottom_right_badge_) {
      dirty = true;
    }
    if (cellular->roaming_state() != roaming_state_) {
      roaming_state_ = cellular->roaming_state();
      dirty = true;
    }
    return dirty;
  }

  // Generate accessability text and call Speak().
  void AccessabilitySpeak(const Network* network) {
    NetworkLibrary* cros = CrosLibrary::Get()->GetNetworkLibrary();
    std::string connection_string;
    if (Network::IsConnectedState(state_)) {
      switch (network->type()) {
        case TYPE_ETHERNET:
          connection_string = l10n_util::GetStringFUTF8(
              IDS_STATUSBAR_NETWORK_CONNECTED_TOOLTIP,
              l10n_util::GetStringUTF16(
                  IDS_STATUSBAR_NETWORK_DEVICE_ETHERNET));
          break;
        default:
          connection_string = l10n_util::GetStringFUTF8(
              IDS_STATUSBAR_NETWORK_CONNECTED_TOOLTIP,
              UTF8ToUTF16(network->name()));
          break;
      }
    } else if (Network::IsConnectingState(state_)) {
      const Network* connecting_network = cros->connecting_network();
      if (connecting_network && connecting_network->type() != TYPE_ETHERNET) {
        connection_string = l10n_util::GetStringFUTF8(
            IDS_STATUSBAR_NETWORK_CONNECTING_TOOLTIP,
            UTF8ToUTF16(connecting_network->name()));
      }
    } else if (Network::IsDisconnectedState(state_)) {
      connection_string = l10n_util::GetStringUTF8(
          IDS_STATUSBAR_NETWORK_NO_NETWORK_TOOLTIP);
    }
    accessibility::Speak(connection_string.c_str());
  }

  std::string service_path_;
  ConnectionState state_;
  NetworkMenuIcon::ResourceColorTheme resource_color_theme_;
  int strength_index_;
  SkBitmap bitmap_;
  SkBitmap icon_;
  const SkBitmap* top_left_badge_;
  const SkBitmap* top_right_badge_;
  const SkBitmap* bottom_left_badge_;
  const SkBitmap* bottom_right_badge_;
  bool is_status_bar_;
  const Network* connected_network_;  // weak pointer; used for VPN icons.
  NetworkRoamingState roaming_state_;

  DISALLOW_COPY_AND_ASSIGN(NetworkIcon);
};

////////////////////////////////////////////////////////////////////////////////
// NetworkMenuIcon

NetworkMenuIcon::NetworkMenuIcon(Delegate* delegate, Mode mode)
    : mode_(mode),
      delegate_(delegate),
      resource_color_theme_(COLOR_DARK),
      ALLOW_THIS_IN_INITIALIZER_LIST(animation_connecting_(this)),
      last_network_type_(TYPE_WIFI),
      connecting_network_(NULL) {
  // Set up the connection animation throbber.
  animation_connecting_.SetThrobDuration(kThrobDurationMs);
  animation_connecting_.SetTweenType(ui::Tween::LINEAR);

  // Initialize the icon.
  icon_.reset(new NetworkIcon(resource_color_theme_));
}

NetworkMenuIcon::~NetworkMenuIcon() {
}

// Public methods:

void NetworkMenuIcon::SetResourceColorTheme(ResourceColorTheme color) {
  if (color == resource_color_theme_)
    return;

  resource_color_theme_ = color;
  icon_.reset(new NetworkIcon(resource_color_theme_));
}

const SkBitmap NetworkMenuIcon::GetIconAndText(string16* text) {
  SetIconAndText();
  if (text)
    *text = text_;
  icon_->GenerateBitmap();
  return icon_->GetBitmap();
}

void NetworkMenuIcon::AnimationProgressed(const ui::Animation* animation) {
  if (animation == &animation_connecting_ && delegate_) {
    // Only update the connecting network from here.
    if (GetConnectingNetwork() == connecting_network_)
      delegate_->NetworkMenuIconChanged();
  }
}

// Private methods:

// In menu mode, returns any connecting network.
// In dropdown mode, only returns connecting network if not connected.
const Network* NetworkMenuIcon::GetConnectingNetwork() {
  NetworkLibrary* cros = CrosLibrary::Get()->GetNetworkLibrary();
  if ((mode_ == MENU_MODE) ||
      (mode_ == DROPDOWN_MODE && !cros->connected_network())) {
    const Network* connecting_network = cros->connecting_network();
    // Only show connecting icon for wireless networks.
    if (connecting_network && connecting_network->type() != TYPE_ETHERNET) {
      return connecting_network;
    }
  }
  return NULL;
}

double NetworkMenuIcon::GetAnimation() {
  if (!animation_connecting_.is_animating()) {
    animation_connecting_.Reset();
    animation_connecting_.StartThrobbing(-1 /*throb indefinitely*/);
    return 0;
  }
  return animation_connecting_.GetCurrentValue();
}

// TODO(stevenjb): move below SetIconAndText.
void NetworkMenuIcon::SetConnectingIconAndText() {
  int image_count;
  BitmapType bitmap_type;
  SkBitmap** images;

  if (connecting_network_->type() == TYPE_WIFI) {
    image_count = kNumArcsImages - 1;
    bitmap_type = ARCS;
    images = resource_color_theme_ == COLOR_DARK ? kArcsImagesAnimatingDark :
                                                   kArcsImagesAnimatingLight;
  } else {
    image_count = kNumBarsImages - 1;
    bitmap_type = BARS;
    images = resource_color_theme_ == COLOR_DARK ? kBarsImagesAnimatingDark :
                                                   kBarsImagesAnimatingLight;
  }
  int index = GetAnimation() * nextafter(static_cast<float>(image_count), 0);
  index = std::max(std::min(index, image_count - 1), 0);

  // Lazily cache images.
  if (!images[index]) {
    SkBitmap source = GetBitmap(bitmap_type, index + 1, resource_color_theme_);
    images[index] =
        new SkBitmap(NetworkMenuIcon::GenerateConnectingBitmap(source));
  }
  icon_->set_icon(*images[index]);
  icon_->SetBadges(connecting_network_);
  if (mode_ == MENU_MODE) {
    text_ = l10n_util::GetStringFUTF16(
        IDS_STATUSBAR_NETWORK_CONNECTING_TOOLTIP,
        UTF8ToUTF16(connecting_network_->name()));
  } else {
    text_ = UTF8ToUTF16(connecting_network_->name());
  }
}

// Sets up the icon and badges for GenerateBitmap().
void NetworkMenuIcon::SetIconAndText() {
  NetworkLibrary* cros = CrosLibrary::Get()->GetNetworkLibrary();
  DCHECK(cros);

  icon_->ClearIconAndBadges();

  // If we are connecting to a network, display that.
  connecting_network_ = GetConnectingNetwork();
  if (connecting_network_) {
    SetConnectingIconAndText();
    return;
  }

  // If not connecting to a network, show the active or connected network.
  const Network* network;
  if (mode_ == DROPDOWN_MODE && cros->connected_network())
    network = cros->connected_network();
  else
    network = cros->active_network();
  if (network) {
    SetActiveNetworkIconAndText(network);
    return;
  }

  // Not connecting, so stop animation.
  animation_connecting_.Stop();

  // No connecting, connected, or active network.
  SetDisconnectedIconAndText();
}

void NetworkMenuIcon::SetActiveNetworkIconAndText(const Network* network) {
  NetworkLibrary* cros = CrosLibrary::Get()->GetNetworkLibrary();
  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
  bool animating = false;
  last_network_type_ = network->type();

  // Set icon and badges. Call SetDirty() since network may have changed.
  icon_->SetDirty();
  icon_->UpdateIcon(network);
  // Overlay the VPN badge if connecting to a VPN.
  if (network->type() != TYPE_VPN && cros->virtual_network()) {
    if (cros->virtual_network()->connecting()) {
      const SkBitmap* vpn_badge = rb.GetBitmapNamed(kVpnBadgeId);
      const double animation = GetAnimation();
      animating = true;
      // Even though this is the only place we use vpn_connecting_badge_,
      // it is important that this is a member variable since we set a
      // pointer to it and access that pointer in icon_->GenerateBitmap().
      vpn_connecting_badge_ = SkBitmapOperations::CreateBlendedBitmap(
          GetEmptyVpnBadge(), *vpn_badge, animation);
      icon_->set_bottom_left_badge(&vpn_connecting_badge_);
    }
  }
  if (!animating)
    animation_connecting_.Stop();

  // Set the text to display.
  if (network->type() == TYPE_ETHERNET) {
    if (mode_ == MENU_MODE) {
      text_ = l10n_util::GetStringFUTF16(
          IDS_STATUSBAR_NETWORK_CONNECTED_TOOLTIP,
          l10n_util::GetStringUTF16(
              IDS_STATUSBAR_NETWORK_DEVICE_ETHERNET));
    } else {
      text_ = l10n_util::GetStringUTF16(IDS_STATUSBAR_NETWORK_DEVICE_ETHERNET);
    }
  } else {
    if (mode_ == MENU_MODE) {
      text_ = l10n_util::GetStringFUTF16(
          IDS_STATUSBAR_NETWORK_CONNECTED_TOOLTIP,
          UTF8ToUTF16(network->name()));
    } else {
      text_ = UTF8ToUTF16(network->name());
    }
  }
}

void NetworkMenuIcon::SetDisconnectedIconAndText() {
  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
  switch (last_network_type_) {
    case TYPE_ETHERNET:
      icon_->set_icon(*rb.GetBitmapNamed(IDR_STATUSBAR_WIRED));
      icon_->set_bottom_right_badge(
          rb.GetBitmapNamed(IDR_STATUSBAR_NETWORK_DISCONNECTED));
      break;
    case TYPE_WIFI:
      icon_->set_icon(GetDisconnectedBitmap(ARCS, resource_color_theme_));
      break;
    case TYPE_CELLULAR:
    default:
      icon_->set_icon(GetDisconnectedBitmap(BARS, resource_color_theme_));
      icon_->set_bottom_right_badge(
          rb.GetBitmapNamed(IDR_STATUSBAR_NETWORK_DISCONNECTED));
      break;
  }
  if (mode_ == MENU_MODE)
    text_ = l10n_util::GetStringUTF16(IDS_STATUSBAR_NETWORK_NO_NETWORK_TOOLTIP);
  else
    text_ = l10n_util::GetStringUTF16(IDS_NETWORK_SELECTION_NONE);
}

////////////////////////////////////////////////////////////////////////////////
// Static functions for generating network icon bitmaps:

// This defines how we assemble a network icon.
const SkBitmap NetworkMenuIcon::GenerateBitmapFromComponents(
    const SkBitmap& icon,
    const SkBitmap* top_left_badge,
    const SkBitmap* top_right_badge,
    const SkBitmap* bottom_left_badge,
    const SkBitmap* bottom_right_badge) {
  DCHECK(!icon.empty());
  gfx::Canvas canvas(icon, false);

  if (top_left_badge) {
    canvas.DrawBitmapInt(*top_left_badge, kBadgeLeftX, kBadgeTopY);
  }
  if (top_right_badge) {
    int x = min(kBadgeRightX, icon.width() - top_right_badge->width());
    canvas.DrawBitmapInt(*top_right_badge, x, kBadgeTopY);
  }
  if (bottom_left_badge) {
    int y = min(kBadgeBottomY, icon.height() - bottom_left_badge->height());
    canvas.DrawBitmapInt(*bottom_left_badge, kBadgeLeftX, y);
  }
  if (bottom_right_badge) {
    int x = min(kBadgeRightX, icon.width() - bottom_right_badge->width());
    int y = min(kBadgeBottomY, icon.height() - bottom_right_badge->height());
    canvas.DrawBitmapInt(*bottom_right_badge, x, y);
  }

  return canvas.ExtractBitmap();
}

// We blend connecting icons with a black image to generate a faded icon.
const SkBitmap NetworkMenuIcon::GenerateConnectingBitmap(
    const SkBitmap& source) {
  CR_DEFINE_STATIC_LOCAL(SkBitmap, empty_badge, ());
  if (empty_badge.empty()) {
    empty_badge.setConfig(SkBitmap::kARGB_8888_Config,
                          source.width(),
                          source.height());
    empty_badge.allocPixels();
    empty_badge.eraseARGB(0, 0, 0, 0);
  }
  DCHECK(empty_badge.width() == source.width());
  DCHECK(empty_badge.height() == source.height());
  return SkBitmapOperations::CreateBlendedBitmap(
      empty_badge, source, kConnectingImageAlpha);
}

// Generates and caches an icon bitmap for a network's current state.
const SkBitmap NetworkMenuIcon::GetBitmap(const Network* network,
                                          ResourceColorTheme color) {
  DCHECK(network);
  // Maintain a static (global) icon map. Note: Icons are never destroyed;
  // it is assumed that a finite and reasonable number of network icons will be
  // created during a session.
  typedef std::map<std::string, NetworkIcon*> NetworkIconMap;
  static NetworkIconMap* icon_map_dark = NULL;
  static NetworkIconMap* icon_map_light = NULL;
  if (icon_map_dark == NULL)
    icon_map_dark = new NetworkIconMap;
  if (icon_map_light == NULL)
    icon_map_light = new NetworkIconMap;

  NetworkIconMap* icon_map = color == COLOR_DARK ? icon_map_dark :
                                                   icon_map_light;
  // Find or add the icon.
  NetworkIcon* icon;
  NetworkIconMap::iterator iter = icon_map->find(network->service_path());
  if (iter == icon_map->end()) {
    icon = new NetworkIcon(network->service_path(), color);
    icon_map->insert(std::make_pair(network->service_path(), icon));
  } else {
    icon = iter->second;
  }
  // Update and return the icon's bitmap.
  icon->Update();
  return icon->GetBitmap();
}

// Returns an icon for a disconnected VPN.
const SkBitmap NetworkMenuIcon::GetVpnBitmap() {
  static SkBitmap* vpn_bitmap = NULL;
  if (vpn_bitmap == NULL)
    vpn_bitmap = new SkBitmap(GetVpnResource(IDR_STATUSBAR_VPN));
  return *vpn_bitmap;
}

const SkBitmap NetworkMenuIcon::GetBitmap(BitmapType type,
                                          int index,
                                          ResourceColorTheme color) {
  int width, height;
  SkBitmap* images;
  if (type == ARCS) {
    if (index >= kNumArcsImages)
      return SkBitmap();

    images = ResourceBundle::GetSharedInstance().GetBitmapNamed(
        color == COLOR_DARK ? IDR_STATUSBAR_NETWORK_ARCS_DARK :
                              IDR_STATUSBAR_NETWORK_ARCS_LIGHT);
    width = images->width();
    height = images->height() / kNumArcsImages;
  } else {
    if (index >= kNumBarsImages)
      return SkBitmap();

    images = ResourceBundle::GetSharedInstance().GetBitmapNamed(
        color == COLOR_DARK ? IDR_STATUSBAR_NETWORK_BARS_DARK :
                              IDR_STATUSBAR_NETWORK_BARS_LIGHT);
    width = images->width();
    height = images->height() / kNumBarsImages;
  }

  SkIRect subset = SkIRect::MakeXYWH(0, index * height, width, height);
  SkBitmap image;
  images->extractSubset(&image, subset);
  return image;
}

const SkBitmap NetworkMenuIcon::GetDisconnectedBitmap(
    BitmapType type,
    ResourceColorTheme color) {
  return GetBitmap(type, 0, color);
}

const SkBitmap NetworkMenuIcon::GetConnectedBitmap(BitmapType type,
                                                   ResourceColorTheme color) {
  return GetBitmap(type, NumBitmaps(type) - 1, color);
}

int NetworkMenuIcon::NumBitmaps(BitmapType type) {
  return (type == ARCS) ? kNumArcsImages : kNumBarsImages;
}

}  // chromeos