ios/chrome/browser/experimental_flags.mm

   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 // This file can be empty. Its purpose is to contain the relatively short lived
   6 // definitions required for experimental flags.
   7
   8 #include "ios/chrome/browser/experimental_flags.h"
   9
  10 #import <Foundation/Foundation.h>
  11
  12 #include <string>
  13
  14 #include "base/command_line.h"
  15 #include "base/metrics/field_trial.h"
  16 #include "base/strings/string_number_conversions.h"
  17 #include "base/strings/string_util.h"
  18 #include "components/variations/variations_associated_data.h"
  19 #include "ios/chrome/browser/chrome_switches.h"
  20 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
  21 #include "ios/web/public/web_view_util.h"
  22
  23 namespace {
  24 NSString* const kEnableAlertOnBackgroundUpload =
  25     @"EnableAlertsOnBackgroundUpload";
  26 NSString* const kEnableBookmarkRefreshImageOnEachVisit =
  27     @"EnableBookmarkRefreshImageOnEachVisit";
  28 }  // namespace
  29
  30 namespace experimental_flags {
  31
  32 bool IsAlertOnBackgroundUploadEnabled() {
  33   return [[NSUserDefaults standardUserDefaults]
  34       boolForKey:kEnableAlertOnBackgroundUpload];
  35 }
  36
  37 bool IsBookmarkCollectionEnabled() {
  38   return ios::GetChromeBrowserProvider()->IsBookmarkCollectionEnabled();
  39 }
  40
  41 bool IsBookmarkImageFetchingOnVisitEnabled() {
  42   if (!IsBookmarkCollectionEnabled())
  43     return false;
  44
  45   NSUserDefaults* user_defaults = [NSUserDefaults standardUserDefaults];
  46   if ([user_defaults boolForKey:kEnableBookmarkRefreshImageOnEachVisit])
  47     return true;
  48
  49   const char kFieldTrialName[] = "EnhancedBookmarks";
  50   std::string enable_fetching = variations::GetVariationParamValue(
  51       kFieldTrialName, "EnableImagesFetchingOnVisit");
  52   return !enable_fetching.empty();
  53 }
  54
  55 bool IsWKWebViewEnabled() {
  56   // If WKWebView isn't supported, don't activate the experiment at all. This
  57   // avoids someone being slotted into the WKWebView bucket (and thus reporting
  58   // as WKWebView), but actually running UIWebView.
  59   if (!web::IsWKWebViewSupported())
  60     return false;
  61
  62   std::string group_name =
  63       base::FieldTrialList::FindFullName("IOSUseWKWebView");
  64
  65   // First check if the experimental flag is turned on.
  66   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
  67   if (command_line->HasSwitch(switches::kEnableIOSWKWebView)) {
  68     return true;
  69   } else if (command_line->HasSwitch(switches::kDisableIOSWKWebView)) {
  70     return false;
  71   }
  72
  73   // Check if the finch experiment is turned on.
  74   return base::StartsWithASCII(group_name, "Enabled", false);
  75 }
  76
  77 size_t MemoryWedgeSizeInMB() {
  78   std::string wedge_size_string;
  79
  80   // Get the size from the Experimental setting.
  81   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
  82   wedge_size_string =
  83       command_line->GetSwitchValueASCII(switches::kIOSMemoryWedgeSize);
  84
  85   // Otherwise, get from a variation param.
  86   if (wedge_size_string.empty()) {
  87     wedge_size_string =
  88         variations::GetVariationParamValue("MemoryWedge", "wedge_size");
  89   }
  90
  91   // Parse the value.
  92   size_t wedge_size_in_mb = 0;
  93   if (base::StringToSizeT(wedge_size_string, &wedge_size_in_mb))
  94     return wedge_size_in_mb;
  95   return 0;
  96 }
  97
  98 }  // namespace experimental_flags