components/favicon_base/large_icon_url_parser.cc

   1 // Copyright 2015 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 "components/favicon_base/large_icon_url_parser.h"
   6
   7 #include "base/logging.h"
   8 #include "base/strings/string_number_conversions.h"
   9 #include "base/strings/string_split.h"
  10 #include "base/strings/string_util.h"
  11 #include "third_party/skia/include/utils/SkParse.h"
  12 #include "ui/gfx/favicon_size.h"
  13
  14 LargeIconUrlParser::LargeIconUrlParser() : size_in_pixels_(48) {
  15 }
  16
  17 LargeIconUrlParser::~LargeIconUrlParser() {
  18 }
  19
  20 bool LargeIconUrlParser::Parse(base::StringPiece path) {
  21   if (path.empty())
  22     return false;
  23
  24   size_t slash = path.find("/", 0);  // |path| does not start with '/'.
  25   if (slash == base::StringPiece::npos)
  26     return false;
  27   base::StringPiece size_str = path.substr(0, slash);
  28   // Disallow empty, non-numeric, or non-positive sizes.
  29   if (size_str.empty() ||
  30       !base::StringToInt(size_str, &size_in_pixels_) ||
  31       size_in_pixels_ <= 0)
  32     return false;
  33
  34   // Need to store the index of the URL field, so Instant Extended can translate
  35   // large icon URLs using advanced parameters.
  36   // Example:
  37   //   "chrome-search://large-icon/48/<renderer-id>/<most-visited-id>"
  38   // would be translated to:
  39   //   "chrome-search://large-icon/48/<most-visited-item-with-given-id>".
  40   path_index_ = slash + 1;
  41   url_string_ = path.substr(path_index_).as_string();
  42   return true;
  43 }