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      1 // Copyright (c) 2011 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/chromeos/login/default_user_images.h"
      6 
      7 #include "base/basictypes.h"
      8 #include "base/logging.h"
      9 #include "base/string_number_conversions.h"
     10 #include "base/string_util.h"
     11 #include "base/stringprintf.h"
     12 #include "grit/theme_resources.h"
     13 
     14 namespace chromeos {
     15 
     16 namespace {
     17 
     18 const char kDefaultPathPrefix[] = "default:";
     19 const char kDefaultUrlPrefix[] = "chrome://theme/IDR_LOGIN_DEFAULT_USER_";
     20 const char kFirstDefaultUrl[] = "chrome://theme/IDR_LOGIN_DEFAULT_USER";
     21 
     22 const char* kOldDefaultImageNames[] = {
     23   "default:gray",
     24   "default:green",
     25   "default:blue",
     26   "default:yellow",
     27   "default:red",
     28 };
     29 
     30 // Returns a string consisting of the prefix specified and the index of the
     31 // image if its valid.
     32 std::string GetDefaultImageString(int index, const std::string& prefix) {
     33   if (index < 0 || index >= kDefaultImagesCount) {
     34     NOTREACHED();
     35     return std::string();
     36   }
     37   return StringPrintf("%s%d", prefix.c_str(), index);
     38 }
     39 
     40 // Returns true if the string specified consists of the prefix and one of
     41 // the default images indices. Returns the index of the image in |image_id|
     42 // variable.
     43 bool IsDefaultImageString(const std::string& s,
     44                           const std::string& prefix,
     45                           int* image_id) {
     46   DCHECK(image_id);
     47   if (!StartsWithASCII(s, prefix, true))
     48     return false;
     49 
     50   int image_index = -1;
     51   if (base::StringToInt(s.begin() + prefix.length(),
     52                         s.end(),
     53                         &image_index)) {
     54     if (image_index < 0 || image_index >= kDefaultImagesCount)
     55       return false;
     56     *image_id = image_index;
     57     return true;
     58   }
     59 
     60   return false;
     61 }
     62 }  // namespace
     63 
     64 std::string GetDefaultImagePath(int index) {
     65   return GetDefaultImageString(index, kDefaultPathPrefix);
     66 }
     67 
     68 bool IsDefaultImagePath(const std::string& path, int* image_id) {
     69   if (IsDefaultImageString(path, kDefaultPathPrefix, image_id))
     70     return true;
     71 
     72   // Check old default image names for back-compatibility.
     73   for (size_t i = 0; i < arraysize(kOldDefaultImageNames); ++i) {
     74     if (path == kOldDefaultImageNames[i]) {
     75       *image_id = static_cast<int>(i);
     76       return true;
     77     }
     78   }
     79   return false;
     80 }
     81 
     82 std::string GetDefaultImageUrl(int index) {
     83   if (index == 0)
     84     return kFirstDefaultUrl;
     85   return GetDefaultImageString(index, kDefaultUrlPrefix);
     86 }
     87 
     88 bool IsDefaultImageUrl(const std::string url, int* image_id) {
     89   if (url == kFirstDefaultUrl) {
     90     *image_id = 0;
     91     return true;
     92   }
     93   return IsDefaultImageString(url, kDefaultUrlPrefix, image_id);
     94 }
     95 
     96 // Resource IDs of default user images.
     97 const int kDefaultImageResources[] = {
     98   IDR_LOGIN_DEFAULT_USER,
     99   IDR_LOGIN_DEFAULT_USER_1,
    100   IDR_LOGIN_DEFAULT_USER_2,
    101   IDR_LOGIN_DEFAULT_USER_3,
    102   IDR_LOGIN_DEFAULT_USER_4,
    103   IDR_LOGIN_DEFAULT_USER_5,
    104   IDR_LOGIN_DEFAULT_USER_6,
    105   IDR_LOGIN_DEFAULT_USER_7,
    106   IDR_LOGIN_DEFAULT_USER_8,
    107   IDR_LOGIN_DEFAULT_USER_9,
    108   IDR_LOGIN_DEFAULT_USER_10,
    109   IDR_LOGIN_DEFAULT_USER_11,
    110   IDR_LOGIN_DEFAULT_USER_12,
    111   IDR_LOGIN_DEFAULT_USER_13,
    112   IDR_LOGIN_DEFAULT_USER_14,
    113   IDR_LOGIN_DEFAULT_USER_15,
    114   IDR_LOGIN_DEFAULT_USER_16,
    115   IDR_LOGIN_DEFAULT_USER_17,
    116   IDR_LOGIN_DEFAULT_USER_18,
    117 };
    118 
    119 const int kDefaultImagesCount = arraysize(kDefaultImageResources);
    120 
    121 }  // namespace chromeos
    122 
    123