content/common/content_switches_internal.cc

   1 // Copyright (c) 2014 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 "content/common/content_switches_internal.h"
   6
   7 #include <string>
   8
   9 #include "base/command_line.h"
  10 #include "base/metrics/field_trial.h"
  11 #include "content/public/common/content_switches.h"
  12
  13 #if defined(OS_WIN)
  14 #include "base/win/windows_version.h"
  15 #include "ui/gfx/win/direct_write.h"
  16 #endif
  17
  18 namespace content {
  19
  20 bool IsPinchToZoomEnabled() {
  21   const base::CommandLine& command_line =
  22       *base::CommandLine::ForCurrentProcess();
  23
  24   // --disable-pinch should always disable pinch
  25   if (command_line.HasSwitch(switches::kDisablePinch))
  26     return false;
  27
  28 #if defined(OS_WIN)
  29   return base::win::GetVersion() >= base::win::VERSION_WIN8;
  30 #elif defined(OS_CHROMEOS)
  31   return true;
  32 #else
  33   return command_line.HasSwitch(switches::kEnableViewport) ||
  34       command_line.HasSwitch(switches::kEnablePinch);
  35 #endif
  36 }
  37
  38 #if defined(OS_WIN)
  39
  40 bool IsWin32kRendererLockdownEnabled() {
  41   const std::string group_name =
  42       base::FieldTrialList::FindFullName("Win32kLockdown");
  43   if (base::win::GetVersion() < base::win::VERSION_WIN8)
  44     return false;
  45   if (!gfx::win::ShouldUseDirectWrite())
  46     return false;
  47   const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
  48   if (cmd_line->HasSwitch(switches::kEnableWin32kRendererLockDown))
  49     return true;
  50   if (cmd_line->HasSwitch(switches::kDisableWin32kRendererLockDown))
  51     return false;
  52   // Default.
  53   return group_name != "Disabled";
  54 }
  55 #endif
  56
  57 V8CacheOptions GetV8CacheOptions() {
  58   const base::CommandLine& command_line =
  59       *base::CommandLine::ForCurrentProcess();
  60   std::string v8_cache_options =
  61       command_line.GetSwitchValueASCII(switches::kV8CacheOptions);
  62   if (v8_cache_options.empty())
  63     v8_cache_options = base::FieldTrialList::FindFullName("V8CacheOptions");
  64   if (v8_cache_options == "parse") {
  65     return V8_CACHE_OPTIONS_PARSE;
  66   } else if (v8_cache_options == "code") {
  67     return V8_CACHE_OPTIONS_CODE;
  68   } else if (v8_cache_options == "code-compressed") {
  69     return V8_CACHE_OPTIONS_CODE_COMPRESSED;
  70   } else if (v8_cache_options == "none") {
  71     return V8_CACHE_OPTIONS_NONE;
  72   } else if (v8_cache_options == "parse-memory") {
  73     return V8_CACHE_OPTIONS_PARSE_MEMORY;
  74   } else if (v8_cache_options == "heuristics") {
  75     return V8_CACHE_OPTIONS_HEURISTICS;
  76   } else if (v8_cache_options == "heuristics-mobile") {
  77     return V8_CACHE_OPTIONS_HEURISTICS_MOBILE;
  78   } else if (v8_cache_options == "heuristics-default") {
  79     return V8_CACHE_OPTIONS_HEURISTICS_DEFAULT;
  80   } else if (v8_cache_options == "heuristics-default-mobile") {
  81     return V8_CACHE_OPTIONS_HEURISTICS_DEFAULT_MOBILE;
  82   } else if (v8_cache_options == "recent") {
  83     return V8_CACHE_OPTIONS_RECENT;
  84   } else if (v8_cache_options == "recent-small") {
  85     return V8_CACHE_OPTIONS_RECENT_SMALL;
  86   } else {
  87     return V8_CACHE_OPTIONS_DEFAULT;
  88   }
  89 }
  90
  91 } // namespace content