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 namespace {
  21
  22 #if defined(OS_WIN)
  23 static bool g_win32k_renderer_lockdown_disabled = false;
  24 #endif
  25
  26 }  // namespace
  27
  28 bool IsPinchToZoomEnabled() {
  29   const base::CommandLine& command_line =
  30       *base::CommandLine::ForCurrentProcess();
  31
  32   // --disable-pinch should always disable pinch
  33   if (command_line.HasSwitch(switches::kDisablePinch))
  34     return false;
  35
  36 #if defined(OS_WIN)
  37   return base::win::GetVersion() >= base::win::VERSION_WIN8;
  38 #elif defined(OS_CHROMEOS)
  39   return true;
  40 #else
  41   return command_line.HasSwitch(switches::kEnableViewport) ||
  42       command_line.HasSwitch(switches::kEnablePinch);
  43 #endif
  44 }
  45
  46 #if defined(OS_WIN)
  47
  48 void DisableWin32kRendererLockdown() {
  49   g_win32k_renderer_lockdown_disabled = true;
  50 }
  51
  52 bool IsWin32kRendererLockdownEnabled() {
  53   if (g_win32k_renderer_lockdown_disabled)
  54     return false;
  55   if (base::win::GetVersion() < base::win::VERSION_WIN8)
  56     return false;
  57   if (!gfx::win::ShouldUseDirectWrite())
  58     return false;
  59   const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
  60   if (cmd_line->HasSwitch(switches::kDisableWin32kRendererLockDown))
  61     return false;
  62   return true;
  63 }
  64 #endif
  65
  66 V8CacheOptions GetV8CacheOptions() {
  67   const base::CommandLine& command_line =
  68       *base::CommandLine::ForCurrentProcess();
  69   std::string v8_cache_options =
  70       command_line.GetSwitchValueASCII(switches::kV8CacheOptions);
  71   if (v8_cache_options.empty())
  72     v8_cache_options = base::FieldTrialList::FindFullName("V8CacheOptions");
  73   if (v8_cache_options == "none") {
  74     return V8_CACHE_OPTIONS_NONE;
  75   } else if (v8_cache_options == "parse") {
  76     return V8_CACHE_OPTIONS_PARSE;
  77   } else if (v8_cache_options == "code") {
  78     return V8_CACHE_OPTIONS_CODE;
  79   } else {
  80     return V8_CACHE_OPTIONS_DEFAULT;
  81   }
  82 }
  83
  84 } // namespace content