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      1 // Copyright (c) 2012 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 "ash/system/chromeos/network/network_icon.h"
      6 
      7 #include "ash/shell.h"
      8 #include "ash/system/chromeos/network/network_icon_animation.h"
      9 #include "ash/system/chromeos/network/network_icon_animation_observer.h"
     10 #include "base/strings/utf_string_conversions.h"
     11 #include "chromeos/network/device_state.h"
     12 #include "chromeos/network/network_connection_handler.h"
     13 #include "chromeos/network/network_state.h"
     14 #include "chromeos/network/network_state_handler.h"
     15 #include "chromeos/network/shill_property_util.h"
     16 #include "grit/ash_resources.h"
     17 #include "grit/ash_strings.h"
     18 #include "third_party/cros_system_api/dbus/service_constants.h"
     19 #include "ui/base/l10n/l10n_util.h"
     20 #include "ui/base/resource/resource_bundle.h"
     21 #include "ui/gfx/canvas.h"
     22 #include "ui/gfx/image/image_skia_operations.h"
     23 #include "ui/gfx/image/image_skia_source.h"
     24 #include "ui/gfx/rect.h"
     25 #include "ui/gfx/size_conversions.h"
     26 
     27 using chromeos::DeviceState;
     28 using chromeos::NetworkConnectionHandler;
     29 using chromeos::NetworkHandler;
     30 using chromeos::NetworkState;
     31 using chromeos::NetworkStateHandler;
     32 using chromeos::NetworkTypePattern;
     33 
     34 namespace ash {
     35 namespace network_icon {
     36 
     37 namespace {
     38 
     39 //------------------------------------------------------------------------------
     40 // Struct to pass icon badges to NetworkIconImageSource.
     41 struct Badges {
     42   Badges()
     43       : top_left(NULL),
     44         top_right(NULL),
     45         bottom_left(NULL),
     46         bottom_right(NULL) {
     47   }
     48   const gfx::ImageSkia* top_left;
     49   const gfx::ImageSkia* top_right;
     50   const gfx::ImageSkia* bottom_left;
     51   const gfx::ImageSkia* bottom_right;
     52 };
     53 
     54 //------------------------------------------------------------------------------
     55 // class used for maintaining a map of network state and images.
     56 class NetworkIconImpl {
     57  public:
     58   explicit NetworkIconImpl(IconType icon_type);
     59 
     60   // Determines whether or not the associated network might be dirty and if so
     61   // updates and generates the icon. Does nothing if network no longer exists.
     62   void Update(const chromeos::NetworkState* network);
     63 
     64   const gfx::ImageSkia& image() const { return image_; }
     65 
     66  private:
     67   // Updates |strength_index_| for wireless networks. Returns true if changed.
     68   bool UpdateWirelessStrengthIndex(const chromeos::NetworkState* network);
     69 
     70   // Updates the local state for cellular networks. Returns true if changed.
     71   bool UpdateCellularState(const chromeos::NetworkState* network);
     72 
     73   // Updates the VPN badge. Returns true if changed.
     74   bool UpdateVPNBadge();
     75 
     76   // Gets |badges| based on |network| and the current state.
     77   void GetBadges(const NetworkState* network, Badges* badges);
     78 
     79   // Gets the appropriate icon and badges and composites the image.
     80   void GenerateImage(const chromeos::NetworkState* network);
     81 
     82   // Defines color theme and VPN badging
     83   const IconType icon_type_;
     84 
     85   // Cached state of the network when the icon was last generated.
     86   std::string state_;
     87 
     88   // Cached strength index of the network when the icon was last generated.
     89   int strength_index_;
     90 
     91   // Cached technology badge for the network when the icon was last generated.
     92   const gfx::ImageSkia* technology_badge_;
     93 
     94   // Cached vpn badge for the network when the icon was last generated.
     95   const gfx::ImageSkia* vpn_badge_;
     96 
     97   // Cached roaming state of the network when the icon was last generated.
     98   std::string roaming_state_;
     99 
    100   // Generated icon image.
    101   gfx::ImageSkia image_;
    102 
    103   DISALLOW_COPY_AND_ASSIGN(NetworkIconImpl);
    104 };
    105 
    106 //------------------------------------------------------------------------------
    107 // Maintain a static (global) icon map. Note: Icons are never destroyed;
    108 // it is assumed that a finite and reasonable number of network icons will be
    109 // created during a session.
    110 
    111 typedef std::map<std::string, NetworkIconImpl*> NetworkIconMap;
    112 
    113 NetworkIconMap* GetIconMapInstance(IconType icon_type, bool create) {
    114   typedef std::map<IconType, NetworkIconMap*> IconTypeMap;
    115   static IconTypeMap* s_icon_map = NULL;
    116   if (s_icon_map == NULL) {
    117     if (!create)
    118       return NULL;
    119     s_icon_map = new IconTypeMap;
    120   }
    121   if (s_icon_map->count(icon_type) == 0) {
    122     if (!create)
    123       return NULL;
    124     (*s_icon_map)[icon_type] = new NetworkIconMap;
    125   }
    126   return (*s_icon_map)[icon_type];
    127 }
    128 
    129 NetworkIconMap* GetIconMap(IconType icon_type) {
    130   return GetIconMapInstance(icon_type, true);
    131 }
    132 
    133 void PurgeIconMap(IconType icon_type,
    134                   const std::set<std::string>& network_paths) {
    135   NetworkIconMap* icon_map = GetIconMapInstance(icon_type, false);
    136   if (!icon_map)
    137     return;
    138   for (NetworkIconMap::iterator loop_iter = icon_map->begin();
    139        loop_iter != icon_map->end(); ) {
    140     NetworkIconMap::iterator cur_iter = loop_iter++;
    141     if (network_paths.count(cur_iter->first) == 0) {
    142       delete cur_iter->second;
    143       icon_map->erase(cur_iter);
    144     }
    145   }
    146 }
    147 
    148 //------------------------------------------------------------------------------
    149 // Utilities for generating icon images.
    150 
    151 // 'NONE' will default to ARCS behavior where appropriate (e.g. no network or
    152 // if a new type gets added).
    153 enum ImageType {
    154   ARCS,
    155   BARS,
    156   NONE
    157 };
    158 
    159 // Amount to fade icons while connecting.
    160 const double kConnectingImageAlpha = 0.5;
    161 
    162 // Images for strength bars for wired networks.
    163 const int kNumBarsImages = 5;
    164 
    165 // Imagaes for strength arcs for wireless networks.
    166 const int kNumArcsImages = 5;
    167 
    168 // Number of discrete images to use for alpha fade animation
    169 const int kNumFadeImages = 10;
    170 
    171 //------------------------------------------------------------------------------
    172 // Classes for generating scaled images.
    173 
    174 const SkBitmap GetEmptyBitmap(const gfx::Size pixel_size) {
    175   typedef std::pair<int, int> SizeKey;
    176   typedef std::map<SizeKey, SkBitmap> SizeBitmapMap;
    177   static SizeBitmapMap* s_empty_bitmaps = new SizeBitmapMap;
    178 
    179   SizeKey key(pixel_size.width(), pixel_size.height());
    180 
    181   SizeBitmapMap::iterator iter = s_empty_bitmaps->find(key);
    182   if (iter != s_empty_bitmaps->end())
    183     return iter->second;
    184 
    185   SkBitmap empty;
    186   empty.setConfig(SkBitmap::kARGB_8888_Config, key.first, key.second);
    187   empty.allocPixels();
    188   empty.eraseARGB(0, 0, 0, 0);
    189   (*s_empty_bitmaps)[key] = empty;
    190   return empty;
    191 }
    192 
    193 class EmptyImageSource: public gfx::ImageSkiaSource {
    194  public:
    195   explicit EmptyImageSource(const gfx::Size& size)
    196       : size_(size) {
    197   }
    198 
    199   virtual gfx::ImageSkiaRep GetImageForScale(float scale) OVERRIDE {
    200     gfx::Size pixel_size = gfx::ToFlooredSize(gfx::ScaleSize(size_, scale));
    201     SkBitmap empty_bitmap = GetEmptyBitmap(pixel_size);
    202     return gfx::ImageSkiaRep(empty_bitmap, scale);
    203   }
    204 
    205  private:
    206   const gfx::Size size_;
    207 
    208   DISALLOW_COPY_AND_ASSIGN(EmptyImageSource);
    209 };
    210 
    211 // This defines how we assemble a network icon.
    212 class NetworkIconImageSource : public gfx::ImageSkiaSource {
    213  public:
    214   NetworkIconImageSource(const gfx::ImageSkia& icon, const Badges& badges)
    215       : icon_(icon),
    216         badges_(badges) {
    217   }
    218   virtual ~NetworkIconImageSource() {}
    219 
    220   // TODO(pkotwicz): Figure out what to do when a new image resolution becomes
    221   // available.
    222   virtual gfx::ImageSkiaRep GetImageForScale(float scale) OVERRIDE {
    223     gfx::ImageSkiaRep icon_rep = icon_.GetRepresentation(scale);
    224     if (icon_rep.is_null())
    225       return gfx::ImageSkiaRep();
    226     gfx::Canvas canvas(icon_rep, false);
    227     if (badges_.top_left)
    228       canvas.DrawImageInt(*badges_.top_left, 0, 0);
    229     if (badges_.top_right)
    230       canvas.DrawImageInt(*badges_.top_right,
    231                           icon_.width() - badges_.top_right->width(), 0);
    232     if (badges_.bottom_left) {
    233       canvas.DrawImageInt(*badges_.bottom_left,
    234                           0, icon_.height() - badges_.bottom_left->height());
    235     }
    236     if (badges_.bottom_right) {
    237       canvas.DrawImageInt(*badges_.bottom_right,
    238                           icon_.width() - badges_.bottom_right->width(),
    239                           icon_.height() - badges_.bottom_right->height());
    240     }
    241     return canvas.ExtractImageRep();
    242   }
    243 
    244  private:
    245   const gfx::ImageSkia icon_;
    246   const Badges badges_;
    247 
    248   DISALLOW_COPY_AND_ASSIGN(NetworkIconImageSource);
    249 };
    250 
    251 //------------------------------------------------------------------------------
    252 // Utilities for extracting icon images.
    253 
    254 bool IconTypeIsDark(IconType icon_type) {
    255   return (icon_type != ICON_TYPE_TRAY);
    256 }
    257 
    258 bool IconTypeHasVPNBadge(IconType icon_type) {
    259   return (icon_type != ICON_TYPE_LIST);
    260 }
    261 
    262 int NumImagesForType(ImageType type) {
    263   return (type == BARS) ? kNumBarsImages : kNumArcsImages;
    264 }
    265 
    266 gfx::ImageSkia* BaseImageForType(ImageType image_type, IconType icon_type) {
    267   gfx::ImageSkia* image;
    268   if (image_type == BARS) {
    269     image =  ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
    270         IconTypeIsDark(icon_type) ?
    271         IDR_AURA_UBER_TRAY_NETWORK_BARS_DARK :
    272         IDR_AURA_UBER_TRAY_NETWORK_BARS_LIGHT);
    273   } else {
    274     image =  ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
    275         IconTypeIsDark(icon_type) ?
    276         IDR_AURA_UBER_TRAY_NETWORK_ARCS_DARK :
    277         IDR_AURA_UBER_TRAY_NETWORK_ARCS_LIGHT);
    278   }
    279   return image;
    280 }
    281 
    282 ImageType ImageTypeForNetworkType(const std::string& type) {
    283   if (type == shill::kTypeWifi)
    284     return ARCS;
    285   else if (type == shill::kTypeCellular || type == shill::kTypeWimax)
    286     return BARS;
    287   return NONE;
    288 }
    289 
    290 gfx::ImageSkia GetImageForIndex(ImageType image_type,
    291                                 IconType icon_type,
    292                                 int index) {
    293   int num_images = NumImagesForType(image_type);
    294   if (index < 0 || index >= num_images)
    295     return gfx::ImageSkia();
    296   gfx::ImageSkia* images = BaseImageForType(image_type, icon_type);
    297   int width = images->width();
    298   int height = images->height() / num_images;
    299   return gfx::ImageSkiaOperations::ExtractSubset(*images,
    300       gfx::Rect(0, index * height, width, height));
    301 }
    302 
    303 const gfx::ImageSkia GetConnectedImage(const std::string& type,
    304                                        IconType icon_type) {
    305   if (type == shill::kTypeVPN) {
    306     return *ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
    307         IDR_AURA_UBER_TRAY_NETWORK_VPN);
    308   }
    309   ImageType image_type = ImageTypeForNetworkType(type);
    310   const int connected_index = NumImagesForType(image_type) - 1;
    311   return GetImageForIndex(image_type, icon_type, connected_index);
    312 }
    313 
    314 const gfx::ImageSkia GetDisconnectedImage(const std::string& type,
    315                                           IconType icon_type) {
    316   if (type == shill::kTypeVPN) {
    317     // Note: same as connected image, shouldn't normally be seen.
    318     return *ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
    319         IDR_AURA_UBER_TRAY_NETWORK_VPN);
    320   }
    321   ImageType image_type = ImageTypeForNetworkType(type);
    322   const int disconnected_index = 0;
    323   return GetImageForIndex(image_type, icon_type, disconnected_index);
    324 }
    325 
    326 gfx::ImageSkia* ConnectingWirelessImage(ImageType image_type,
    327                                         IconType icon_type,
    328                                         double animation) {
    329   static gfx::ImageSkia* s_bars_images_dark[kNumBarsImages - 1];
    330   static gfx::ImageSkia* s_bars_images_light[kNumBarsImages - 1];
    331   static gfx::ImageSkia* s_arcs_images_dark[kNumArcsImages - 1];
    332   static gfx::ImageSkia* s_arcs_images_light[kNumArcsImages - 1];
    333   int image_count = NumImagesForType(image_type) - 1;
    334   int index = animation * nextafter(static_cast<float>(image_count), 0);
    335   index = std::max(std::min(index, image_count - 1), 0);
    336   gfx::ImageSkia** images;
    337   bool dark = IconTypeIsDark(icon_type);
    338   if (image_type == BARS)
    339     images = dark ? s_bars_images_dark : s_bars_images_light;
    340   else
    341     images = dark ? s_arcs_images_dark : s_arcs_images_light;
    342   if (!images[index]) {
    343     // Lazily cache images.
    344     gfx::ImageSkia source = GetImageForIndex(image_type, icon_type, index + 1);
    345     images[index] = new gfx::ImageSkia(
    346         gfx::ImageSkiaOperations::CreateBlendedImage(
    347             gfx::ImageSkia(new EmptyImageSource(source.size()), source.size()),
    348             source,
    349             kConnectingImageAlpha));
    350   }
    351   return images[index];
    352 }
    353 
    354 gfx::ImageSkia* ConnectingVpnImage(double animation) {
    355   int index = animation * nextafter(static_cast<float>(kNumFadeImages), 0);
    356   static gfx::ImageSkia* s_vpn_images[kNumFadeImages];
    357   if (!s_vpn_images[index]) {
    358     // Lazily cache images.
    359     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
    360     gfx::ImageSkia* icon = rb.GetImageSkiaNamed(IDR_AURA_UBER_TRAY_NETWORK_VPN);
    361     s_vpn_images[index] = new gfx::ImageSkia(
    362         gfx::ImageSkiaOperations::CreateBlendedImage(
    363             gfx::ImageSkia(new EmptyImageSource(icon->size()), icon->size()),
    364             *icon,
    365             animation));
    366   }
    367   return s_vpn_images[index];
    368 }
    369 
    370 gfx::ImageSkia* ConnectingVpnBadge(double animation) {
    371   int index = animation * nextafter(static_cast<float>(kNumFadeImages), 0);
    372   static gfx::ImageSkia* s_vpn_badges[kNumFadeImages];
    373   if (!s_vpn_badges[index]) {
    374     // Lazily cache images.
    375     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
    376     gfx::ImageSkia* icon =
    377         rb.GetImageSkiaNamed(IDR_AURA_UBER_TRAY_NETWORK_WIRED);  // For size
    378     gfx::ImageSkia* badge =
    379         rb.GetImageSkiaNamed(IDR_AURA_UBER_TRAY_NETWORK_VPN_BADGE);
    380     s_vpn_badges[index] = new gfx::ImageSkia(
    381         gfx::ImageSkiaOperations::CreateBlendedImage(
    382             gfx::ImageSkia(new EmptyImageSource(icon->size()), icon->size()),
    383             *badge,
    384             animation));
    385   }
    386   return s_vpn_badges[index];
    387 }
    388 
    389 int StrengthIndex(int strength, int count) {
    390   // Return an index in the range [1, count-1].
    391   const float findex = (static_cast<float>(strength) / 100.0f) *
    392       nextafter(static_cast<float>(count - 1), 0);
    393   int index = 1 + static_cast<int>(findex);
    394   index = std::max(std::min(index, count - 1), 1);
    395   return index;
    396 }
    397 
    398 int GetStrengthIndex(const NetworkState* network) {
    399   ImageType image_type = ImageTypeForNetworkType(network->type());
    400   if (image_type == ARCS)
    401     return StrengthIndex(network->signal_strength(), kNumArcsImages);
    402   else if (image_type == BARS)
    403     return StrengthIndex(network->signal_strength(), kNumBarsImages);
    404   return 0;
    405 }
    406 
    407 const gfx::ImageSkia* BadgeForNetworkTechnology(const NetworkState* network,
    408                                                 IconType icon_type) {
    409   const int kUnknownBadgeType = -1;
    410   int id = kUnknownBadgeType;
    411   const std::string& technology = network->network_technology();
    412   if (technology == shill::kNetworkTechnologyEvdo) {
    413     id = IconTypeIsDark(icon_type) ?
    414         IDR_AURA_UBER_TRAY_NETWORK_EVDO_DARK :
    415         IDR_AURA_UBER_TRAY_NETWORK_EVDO_LIGHT;
    416   } else if (technology == shill::kNetworkTechnology1Xrtt) {
    417     id = IDR_AURA_UBER_TRAY_NETWORK_1X;
    418   } else if (technology == shill::kNetworkTechnologyGprs) {
    419     id = IconTypeIsDark(icon_type) ?
    420         IDR_AURA_UBER_TRAY_NETWORK_GPRS_DARK :
    421         IDR_AURA_UBER_TRAY_NETWORK_GPRS_LIGHT;
    422   } else if (technology == shill::kNetworkTechnologyEdge) {
    423     id = IconTypeIsDark(icon_type) ?
    424         IDR_AURA_UBER_TRAY_NETWORK_EDGE_DARK :
    425         IDR_AURA_UBER_TRAY_NETWORK_EDGE_LIGHT;
    426   } else if (technology == shill::kNetworkTechnologyUmts) {
    427     id = IconTypeIsDark(icon_type) ?
    428         IDR_AURA_UBER_TRAY_NETWORK_3G_DARK :
    429         IDR_AURA_UBER_TRAY_NETWORK_3G_LIGHT;
    430   } else if (technology == shill::kNetworkTechnologyHspa) {
    431     id = IconTypeIsDark(icon_type) ?
    432         IDR_AURA_UBER_TRAY_NETWORK_HSPA_DARK :
    433         IDR_AURA_UBER_TRAY_NETWORK_HSPA_LIGHT;
    434   } else if (technology == shill::kNetworkTechnologyHspaPlus) {
    435     id = IconTypeIsDark(icon_type) ?
    436         IDR_AURA_UBER_TRAY_NETWORK_HSPA_PLUS_DARK :
    437         IDR_AURA_UBER_TRAY_NETWORK_HSPA_PLUS_LIGHT;
    438   } else if (technology == shill::kNetworkTechnologyLte) {
    439     id = IconTypeIsDark(icon_type) ?
    440         IDR_AURA_UBER_TRAY_NETWORK_LTE_DARK :
    441         IDR_AURA_UBER_TRAY_NETWORK_LTE_LIGHT;
    442   } else if (technology == shill::kNetworkTechnologyLteAdvanced) {
    443     id = IconTypeIsDark(icon_type) ?
    444         IDR_AURA_UBER_TRAY_NETWORK_LTE_ADVANCED_DARK :
    445         IDR_AURA_UBER_TRAY_NETWORK_LTE_ADVANCED_LIGHT;
    446   } else if (technology == shill::kNetworkTechnologyGsm) {
    447     id = IconTypeIsDark(icon_type) ?
    448         IDR_AURA_UBER_TRAY_NETWORK_GPRS_DARK :
    449         IDR_AURA_UBER_TRAY_NETWORK_GPRS_LIGHT;
    450   }
    451   if (id == kUnknownBadgeType)
    452     return NULL;
    453   else
    454     return ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(id);
    455 }
    456 
    457 const gfx::ImageSkia* BadgeForVPN(IconType icon_type) {
    458   return ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
    459       IDR_AURA_UBER_TRAY_NETWORK_VPN_BADGE);
    460 }
    461 
    462 gfx::ImageSkia GetIcon(const NetworkState* network,
    463                        IconType icon_type,
    464                        int strength_index) {
    465   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
    466   if (network->Matches(NetworkTypePattern::Ethernet())) {
    467     return *rb.GetImageSkiaNamed(IDR_AURA_UBER_TRAY_NETWORK_WIRED);
    468   } else if (network->Matches(NetworkTypePattern::Wireless())) {
    469     DCHECK(strength_index > 0);
    470     return GetImageForIndex(
    471         ImageTypeForNetworkType(network->type()), icon_type, strength_index);
    472   } else if (network->Matches(NetworkTypePattern::VPN())) {
    473     return *rb.GetImageSkiaNamed(IDR_AURA_UBER_TRAY_NETWORK_VPN);
    474   } else {
    475     LOG(WARNING) << "Request for icon for unsupported type: "
    476                  << network->type();
    477     return *rb.GetImageSkiaNamed(IDR_AURA_UBER_TRAY_NETWORK_WIRED);
    478   }
    479 }
    480 
    481 //------------------------------------------------------------------------------
    482 // Get connecting images
    483 
    484 gfx::ImageSkia GetConnectingVpnImage(IconType icon_type) {
    485   NetworkStateHandler* handler = NetworkHandler::Get()->network_state_handler();
    486   const NetworkState* connected_network = NULL;
    487   if (icon_type == ICON_TYPE_TRAY) {
    488     connected_network =
    489         handler->ConnectedNetworkByType(NetworkTypePattern::NonVirtual());
    490   }
    491   double animation = NetworkIconAnimation::GetInstance()->GetAnimation();
    492 
    493   if (connected_network) {
    494     gfx::ImageSkia icon = GetImageForNetwork(connected_network, icon_type);
    495     Badges badges;
    496     badges.bottom_left = ConnectingVpnBadge(animation);
    497     return gfx::ImageSkia(
    498         new NetworkIconImageSource(icon, badges), icon.size());
    499   } else {
    500     gfx::ImageSkia* icon = ConnectingVpnImage(animation);
    501     return gfx::ImageSkia(
    502         new NetworkIconImageSource(*icon, Badges()), icon->size());
    503   }
    504 }
    505 
    506 gfx::ImageSkia GetConnectingImage(const std::string& network_type,
    507                                   IconType icon_type) {
    508   if (network_type == shill::kTypeVPN)
    509     return GetConnectingVpnImage(icon_type);
    510 
    511   ImageType image_type = ImageTypeForNetworkType(network_type);
    512   double animation = NetworkIconAnimation::GetInstance()->GetAnimation();
    513 
    514   gfx::ImageSkia* icon = ConnectingWirelessImage(
    515       image_type, icon_type, animation);
    516   return gfx::ImageSkia(
    517       new NetworkIconImageSource(*icon, Badges()), icon->size());
    518 }
    519 
    520 }  // namespace
    521 
    522 //------------------------------------------------------------------------------
    523 // NetworkIconImpl
    524 
    525 NetworkIconImpl::NetworkIconImpl(IconType icon_type)
    526     : icon_type_(icon_type),
    527       strength_index_(-1),
    528       technology_badge_(NULL),
    529       vpn_badge_(NULL) {
    530   // Default image
    531   image_ = GetDisconnectedImage(shill::kTypeWifi, icon_type);
    532 }
    533 
    534 void NetworkIconImpl::Update(const NetworkState* network) {
    535   DCHECK(network);
    536   // Determine whether or not we need to update the icon.
    537   bool dirty = image_.isNull();
    538 
    539   // If the network state has changed, the icon needs updating.
    540   if (state_ != network->connection_state()) {
    541     state_ = network->connection_state();
    542     dirty = true;
    543   }
    544 
    545   if (network->Matches(NetworkTypePattern::Wireless()))
    546     dirty |= UpdateWirelessStrengthIndex(network);
    547 
    548   if (network->Matches(NetworkTypePattern::Cellular()))
    549     dirty |= UpdateCellularState(network);
    550 
    551   if (IconTypeHasVPNBadge(icon_type_) &&
    552       network->Matches(NetworkTypePattern::NonVirtual())) {
    553     dirty |= UpdateVPNBadge();
    554   }
    555 
    556   if (dirty) {
    557     // Set the icon and badges based on the network and generate the image.
    558     GenerateImage(network);
    559   }
    560 }
    561 
    562 bool NetworkIconImpl::UpdateWirelessStrengthIndex(const NetworkState* network) {
    563   int index = GetStrengthIndex(network);
    564   if (index != strength_index_) {
    565     strength_index_ = index;
    566     return true;
    567   }
    568   return false;
    569 }
    570 
    571 bool NetworkIconImpl::UpdateCellularState(const NetworkState* network) {
    572   bool dirty = false;
    573   const gfx::ImageSkia* technology_badge =
    574       BadgeForNetworkTechnology(network, icon_type_);
    575   if (technology_badge != technology_badge_) {
    576     technology_badge_ = technology_badge;
    577     dirty = true;
    578   }
    579   std::string roaming_state = network->roaming();
    580   if (roaming_state != roaming_state_) {
    581     roaming_state_ = roaming_state;
    582     dirty = true;
    583   }
    584   return dirty;
    585 }
    586 
    587 bool NetworkIconImpl::UpdateVPNBadge() {
    588   const NetworkState* vpn = NetworkHandler::Get()->network_state_handler()->
    589       ConnectedNetworkByType(NetworkTypePattern::VPN());
    590   if (vpn && vpn_badge_ == NULL) {
    591     vpn_badge_ = BadgeForVPN(icon_type_);
    592     return true;
    593   } else if (!vpn && vpn_badge_ != NULL) {
    594     vpn_badge_ = NULL;
    595     return true;
    596   }
    597   return false;
    598 }
    599 
    600 void NetworkIconImpl::GetBadges(const NetworkState* network, Badges* badges) {
    601   DCHECK(network);
    602   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
    603   NetworkStateHandler* handler = NetworkHandler::Get()->network_state_handler();
    604 
    605   const std::string& type = network->type();
    606   if (type == shill::kTypeWifi) {
    607     if (network->security() != shill::kSecurityNone &&
    608         IconTypeIsDark(icon_type_)) {
    609       badges->bottom_right = rb.GetImageSkiaNamed(
    610           IDR_AURA_UBER_TRAY_NETWORK_SECURE_DARK);
    611     }
    612   } else if (type == shill::kTypeWimax) {
    613     technology_badge_ = rb.GetImageSkiaNamed(
    614         IconTypeIsDark(icon_type_) ?
    615         IDR_AURA_UBER_TRAY_NETWORK_4G_DARK :
    616         IDR_AURA_UBER_TRAY_NETWORK_4G_LIGHT);
    617   } else if (type == shill::kTypeCellular) {
    618     if (network->roaming() == shill::kRoamingStateRoaming) {
    619       // For networks that are always in roaming don't show roaming badge.
    620       const DeviceState* device =
    621           handler->GetDeviceState(network->device_path());
    622       LOG_IF(WARNING, !device) << "Could not find device state for "
    623                                << network->device_path();
    624       if (!device || !device->provider_requires_roaming()) {
    625         badges->bottom_right = rb.GetImageSkiaNamed(
    626             IconTypeIsDark(icon_type_) ?
    627             IDR_AURA_UBER_TRAY_NETWORK_ROAMING_DARK :
    628             IDR_AURA_UBER_TRAY_NETWORK_ROAMING_LIGHT);
    629       }
    630     }
    631   }
    632   if (!network->IsConnectingState()) {
    633     badges->top_left = technology_badge_;
    634     badges->bottom_left = vpn_badge_;
    635   }
    636 }
    637 
    638 void NetworkIconImpl::GenerateImage(const NetworkState* network) {
    639   DCHECK(network);
    640   gfx::ImageSkia icon = GetIcon(network, icon_type_, strength_index_);
    641   Badges badges;
    642   GetBadges(network, &badges);
    643   image_ = gfx::ImageSkia(
    644       new NetworkIconImageSource(icon, badges), icon.size());
    645 }
    646 
    647 //------------------------------------------------------------------------------
    648 // Public interface
    649 
    650 gfx::ImageSkia GetImageForNetwork(const NetworkState* network,
    651                                   IconType icon_type) {
    652   DCHECK(network);
    653   // Handle connecting icons.
    654   if (network->IsConnectingState())
    655     return GetConnectingImage(network->type(), icon_type);
    656 
    657   // Find or add the icon.
    658   NetworkIconMap* icon_map = GetIconMap(icon_type);
    659   NetworkIconImpl* icon;
    660   NetworkIconMap::iterator iter = icon_map->find(network->path());
    661   if (iter == icon_map->end()) {
    662     icon = new NetworkIconImpl(icon_type);
    663     icon_map->insert(std::make_pair(network->path(), icon));
    664   } else {
    665     icon = iter->second;
    666   }
    667 
    668   // Update and return the icon's image.
    669   icon->Update(network);
    670   return icon->image();
    671 }
    672 
    673 gfx::ImageSkia GetImageForConnectedNetwork(IconType icon_type,
    674                                            const std::string& network_type) {
    675   return GetConnectedImage(network_type, icon_type);
    676 }
    677 
    678 gfx::ImageSkia GetImageForConnectingNetwork(IconType icon_type,
    679                                             const std::string& network_type) {
    680   return GetConnectingImage(network_type, icon_type);
    681 }
    682 
    683 gfx::ImageSkia GetImageForDisconnectedNetwork(IconType icon_type,
    684                                               const std::string& network_type) {
    685   return GetDisconnectedImage(network_type, icon_type);
    686 }
    687 
    688 base::string16 GetLabelForNetwork(const chromeos::NetworkState* network,
    689                                   IconType icon_type) {
    690   DCHECK(network);
    691   std::string activation_state = network->activation_state();
    692   if (icon_type == ICON_TYPE_LIST) {
    693     // Show "<network>: [Connecting|Activating]..."
    694     if (network->IsConnectingState()) {
    695       return l10n_util::GetStringFUTF16(
    696           IDS_ASH_STATUS_TRAY_NETWORK_LIST_CONNECTING,
    697           UTF8ToUTF16(network->name()));
    698     }
    699     if (activation_state == shill::kActivationStateActivating) {
    700       return l10n_util::GetStringFUTF16(
    701           IDS_ASH_STATUS_TRAY_NETWORK_LIST_ACTIVATING,
    702           UTF8ToUTF16(network->name()));
    703     }
    704     // Show "Activate <network>" in list view only.
    705     if (activation_state == shill::kActivationStateNotActivated ||
    706         activation_state == shill::kActivationStatePartiallyActivated) {
    707       return l10n_util::GetStringFUTF16(
    708           IDS_ASH_STATUS_TRAY_NETWORK_LIST_ACTIVATE,
    709           UTF8ToUTF16(network->name()));
    710     }
    711   } else {
    712     // Show "[Connected to|Connecting to|Activating] <network>" (non-list view).
    713     if (network->IsConnectedState()) {
    714       return l10n_util::GetStringFUTF16(
    715           IDS_ASH_STATUS_TRAY_NETWORK_CONNECTED, UTF8ToUTF16(network->name()));
    716     }
    717     if (network->IsConnectingState()) {
    718       return l10n_util::GetStringFUTF16(
    719           IDS_ASH_STATUS_TRAY_NETWORK_CONNECTING, UTF8ToUTF16(network->name()));
    720     }
    721     if (activation_state == shill::kActivationStateActivating) {
    722       return l10n_util::GetStringFUTF16(
    723           IDS_ASH_STATUS_TRAY_NETWORK_ACTIVATING, UTF8ToUTF16(network->name()));
    724     }
    725   }
    726 
    727   // Otherwise just show the network name or 'Ethernet'.
    728   if (network->Matches(NetworkTypePattern::Ethernet())) {
    729     return l10n_util::GetStringUTF16(IDS_ASH_STATUS_TRAY_ETHERNET);
    730   } else {
    731     return UTF8ToUTF16(network->name());
    732   }
    733 }
    734 
    735 int GetCellularUninitializedMsg() {
    736   static base::Time s_uninitialized_state_time;
    737   static int s_uninitialized_msg(0);
    738 
    739   NetworkStateHandler* handler = NetworkHandler::Get()->network_state_handler();
    740   if (handler->GetTechnologyState(NetworkTypePattern::Mobile())
    741       == NetworkStateHandler::TECHNOLOGY_UNINITIALIZED) {
    742     s_uninitialized_msg = IDS_ASH_STATUS_TRAY_INITIALIZING_CELLULAR;
    743     s_uninitialized_state_time = base::Time::Now();
    744     return s_uninitialized_msg;
    745   } else if (handler->GetScanningByType(NetworkTypePattern::Mobile())) {
    746     s_uninitialized_msg = IDS_ASH_STATUS_TRAY_CELLULAR_SCANNING;
    747     s_uninitialized_state_time = base::Time::Now();
    748     return s_uninitialized_msg;
    749   }
    750   // There can be a delay between leaving the Initializing state and when
    751   // a Cellular device shows up, so keep showing the initializing
    752   // animation for a bit to avoid flashing the disconnect icon.
    753   const int kInitializingDelaySeconds = 1;
    754   base::TimeDelta dtime = base::Time::Now() - s_uninitialized_state_time;
    755   if (dtime.InSeconds() < kInitializingDelaySeconds)
    756     return s_uninitialized_msg;
    757   return 0;
    758 }
    759 
    760 void GetDefaultNetworkImageAndLabel(IconType icon_type,
    761                                     gfx::ImageSkia* image,
    762                                     base::string16* label,
    763                                     bool* animating) {
    764   NetworkStateHandler* state_handler =
    765       NetworkHandler::Get()->network_state_handler();
    766   NetworkConnectionHandler* connect_handler =
    767       NetworkHandler::Get()->network_connection_handler();
    768   const NetworkState* connected_network =
    769       state_handler->ConnectedNetworkByType(NetworkTypePattern::NonVirtual());
    770   const NetworkState* connecting_network =
    771       state_handler->ConnectingNetworkByType(NetworkTypePattern::Wireless());
    772   if (!connecting_network && icon_type == ICON_TYPE_TRAY) {
    773     connecting_network =
    774         state_handler->ConnectingNetworkByType(NetworkTypePattern::VPN());
    775   }
    776 
    777   const NetworkState* network;
    778   // If we are connecting to a network, and there is either no connected
    779   // network, or the connection was user requested, use the connecting
    780   // network.
    781   if (connecting_network &&
    782       (!connected_network ||
    783        connect_handler->HasConnectingNetwork(connecting_network->path()))) {
    784     network = connecting_network;
    785   } else {
    786     network = connected_network;
    787   }
    788 
    789   // Don't show ethernet in the tray
    790   if (icon_type == ICON_TYPE_TRAY && network &&
    791       network->Matches(NetworkTypePattern::Ethernet())) {
    792     *image = gfx::ImageSkia();
    793     *animating = false;
    794     return;
    795   }
    796 
    797   if (!network) {
    798     // If no connecting network, check if we are activating a network.
    799     const NetworkState* mobile_network =
    800         state_handler->FirstNetworkByType(NetworkTypePattern::Mobile());
    801     if (mobile_network && (mobile_network->activation_state() ==
    802                            shill::kActivationStateActivating)) {
    803       network = mobile_network;
    804     }
    805   }
    806   if (!network) {
    807     // If no connecting network, check for cellular initializing.
    808     int uninitialized_msg = GetCellularUninitializedMsg();
    809     if (uninitialized_msg != 0) {
    810       *image = GetImageForConnectingNetwork(icon_type, shill::kTypeCellular);
    811       if (label)
    812         *label = l10n_util::GetStringUTF16(uninitialized_msg);
    813       *animating = true;
    814     } else {
    815       // Otherwise show the disconnected wifi icon.
    816       *image = GetImageForDisconnectedNetwork(icon_type, shill::kTypeWifi);
    817       if (label) {
    818         *label = l10n_util::GetStringUTF16(
    819             IDS_ASH_STATUS_TRAY_NETWORK_NOT_CONNECTED);
    820       }
    821       *animating = false;
    822     }
    823     return;
    824   }
    825   *animating = network->IsConnectingState();
    826   // Get icon and label for connected or connecting network.
    827   *image = GetImageForNetwork(network, icon_type);
    828   if (label)
    829     *label = GetLabelForNetwork(network, icon_type);
    830 }
    831 
    832 void PurgeNetworkIconCache() {
    833   NetworkStateHandler::NetworkStateList networks;
    834   NetworkHandler::Get()->network_state_handler()->GetNetworkList(&networks);
    835   std::set<std::string> network_paths;
    836   for (NetworkStateHandler::NetworkStateList::iterator iter = networks.begin();
    837        iter != networks.end(); ++iter) {
    838     network_paths.insert((*iter)->path());
    839   }
    840   PurgeIconMap(ICON_TYPE_TRAY, network_paths);
    841   PurgeIconMap(ICON_TYPE_DEFAULT_VIEW, network_paths);
    842   PurgeIconMap(ICON_TYPE_LIST, network_paths);
    843 }
    844 
    845 }  // namespace network_icon
    846 }  // namespace ash
    847