ppapi/proxy/flash_resource.cc

   1 // Copyright (c) 2012 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 "ppapi/proxy/flash_resource.h"
   6
   7 #include <cmath>
   8
   9 #include "base/containers/mru_cache.h"
  10 #include "base/debug/crash_logging.h"
  11 #include "base/lazy_instance.h"
  12 #include "base/time.h"
  13 #include "ppapi/c/pp_errors.h"
  14 #include "ppapi/c/private/ppb_flash.h"
  15 #include "ppapi/c/trusted/ppb_browser_font_trusted.h"
  16 #include "ppapi/proxy/plugin_dispatcher.h"
  17 #include "ppapi/proxy/plugin_globals.h"
  18 #include "ppapi/proxy/ppapi_messages.h"
  19 #include "ppapi/proxy/serialized_structs.h"
  20 #include "ppapi/shared_impl/ppapi_preferences.h"
  21 #include "ppapi/shared_impl/scoped_pp_var.h"
  22 #include "ppapi/shared_impl/time_conversion.h"
  23 #include "ppapi/shared_impl/var.h"
  24 #include "ppapi/thunk/enter.h"
  25 #include "ppapi/thunk/ppb_url_request_info_api.h"
  26
  27 using ppapi::thunk::EnterResourceNoLock;
  28
  29 namespace ppapi {
  30 namespace proxy {
  31
  32 namespace {
  33
  34 struct LocalTimeZoneOffsetEntry {
  35   base::TimeTicks expiration;
  36   double offset;
  37 };
  38
  39 class LocalTimeZoneOffsetCache
  40     : public base::MRUCache<PP_Time, LocalTimeZoneOffsetEntry> {
  41  public:
  42   LocalTimeZoneOffsetCache()
  43       : base::MRUCache<PP_Time, LocalTimeZoneOffsetEntry>(kCacheSize) {}
  44  private:
  45   static const size_t kCacheSize = 100;
  46 };
  47
  48 base::LazyInstance<LocalTimeZoneOffsetCache>::Leaky
  49     g_local_time_zone_offset_cache = LAZY_INSTANCE_INITIALIZER;
  50
  51 } //  namespace
  52
  53 FlashResource::FlashResource(Connection connection,
  54                              PP_Instance instance,
  55                              PluginDispatcher* plugin_dispatcher)
  56     : PluginResource(connection, instance),
  57       plugin_dispatcher_(plugin_dispatcher) {
  58   SendCreate(RENDERER, PpapiHostMsg_Flash_Create());
  59   SendCreate(BROWSER, PpapiHostMsg_Flash_Create());
  60 }
  61
  62 FlashResource::~FlashResource() {
  63 }
  64
  65 thunk::PPB_Flash_Functions_API* FlashResource::AsPPB_Flash_Functions_API() {
  66   return this;
  67 }
  68
  69 PP_Var FlashResource::GetProxyForURL(PP_Instance instance,
  70                                      const std::string& url) {
  71   std::string proxy;
  72   int32_t result = SyncCall<PpapiPluginMsg_Flash_GetProxyForURLReply>(RENDERER,
  73       PpapiHostMsg_Flash_GetProxyForURL(url), &proxy);
  74
  75   if (result == PP_OK)
  76     return StringVar::StringToPPVar(proxy);
  77   return PP_MakeUndefined();
  78 }
  79
  80 void FlashResource::UpdateActivity(PP_Instance instance) {
  81   Post(BROWSER, PpapiHostMsg_Flash_UpdateActivity());
  82 }
  83
  84 PP_Bool FlashResource::SetCrashData(PP_Instance instance,
  85                                     PP_FlashCrashKey key,
  86                                     PP_Var value) {
  87   StringVar* url_string_var(StringVar::FromPPVar(value));
  88   if (!url_string_var)
  89     return PP_FALSE;
  90   switch (key) {
  91     case PP_FLASHCRASHKEY_URL: {
  92       PluginGlobals::Get()->SetActiveURL(url_string_var->value());
  93       return PP_TRUE;
  94     }
  95     case PP_FLASHCRASHKEY_RESOURCE_URL: {
  96       base::debug::SetCrashKeyValue("subresource_url", url_string_var->value());
  97       return PP_TRUE;
  98     }
  99   }
 100   return PP_FALSE;
 101 }
 102
 103 double FlashResource::GetLocalTimeZoneOffset(PP_Instance instance,
 104                                              PP_Time t) {
 105   LocalTimeZoneOffsetCache& cache = g_local_time_zone_offset_cache.Get();
 106
 107   // Get the minimum PP_Time value that shares the same minute as |t|.
 108   // Use cached offset if cache hasn't expired and |t| is in the same minute as
 109   // the time for the cached offset (assume offsets change on minute
 110   // boundaries).
 111   PP_Time t_minute_base = floor(t / 60.0) * 60.0;
 112   LocalTimeZoneOffsetCache::iterator iter = cache.Get(t_minute_base);
 113   base::TimeTicks now = base::TimeTicks::Now();
 114   if (iter != cache.end() && now < iter->second.expiration)
 115     return iter->second.offset;
 116
 117   // Cache the local offset for ten seconds, since it's slow on XP and Linux.
 118   // Note that TimeTicks does not continue counting across sleep/resume on all
 119   // platforms. This may be acceptable for 10 seconds, but if in the future this
 120   // is changed to one minute or more, then we should consider using base::Time.
 121   const int64 kMaxCachedLocalOffsetAgeInSeconds = 10;
 122   base::TimeDelta expiration_delta =
 123       base::TimeDelta::FromSeconds(kMaxCachedLocalOffsetAgeInSeconds);
 124
 125   LocalTimeZoneOffsetEntry cache_entry;
 126   cache_entry.expiration = now + expiration_delta;
 127   cache_entry.offset = 0.0;
 128
 129   // We can't do the conversion here on Linux because the localtime calls
 130   // require filesystem access prohibited by the sandbox.
 131   // TODO(shess): Figure out why OSX needs the access, the sandbox warmup should
 132   // handle it.  http://crbug.com/149006
 133 #if defined(OS_LINUX) || defined(OS_MACOSX)
 134   int32_t result = SyncCall<PpapiPluginMsg_Flash_GetLocalTimeZoneOffsetReply>(
 135       BROWSER,
 136       PpapiHostMsg_Flash_GetLocalTimeZoneOffset(PPTimeToTime(t)),
 137       &cache_entry.offset);
 138   if (result != PP_OK)
 139     cache_entry.offset = 0.0;
 140 #else
 141   cache_entry.offset = PPGetLocalTimeZoneOffset(PPTimeToTime(t));
 142 #endif
 143
 144   cache.Put(t_minute_base, cache_entry);
 145   return cache_entry.offset;
 146 }
 147
 148 PP_Var FlashResource::GetSetting(PP_Instance instance,
 149                                  PP_FlashSetting setting) {
 150   switch (setting) {
 151     case PP_FLASHSETTING_3DENABLED:
 152       return PP_MakeBool(PP_FromBool(
 153           plugin_dispatcher_->preferences().is_3d_supported));
 154     case PP_FLASHSETTING_INCOGNITO:
 155       return PP_MakeBool(PP_FromBool(plugin_dispatcher_->incognito()));
 156     case PP_FLASHSETTING_STAGE3DENABLED:
 157       return PP_MakeBool(PP_FromBool(
 158           plugin_dispatcher_->preferences().is_stage3d_supported));
 159     case PP_FLASHSETTING_STAGE3DBASELINEENABLED:
 160       return PP_MakeBool(PP_FromBool(
 161           plugin_dispatcher_->preferences().is_stage3d_baseline_supported));
 162     case PP_FLASHSETTING_LANGUAGE:
 163       return StringVar::StringToPPVar(
 164           PluginGlobals::Get()->GetUILanguage());
 165     case PP_FLASHSETTING_NUMCORES:
 166       return PP_MakeInt32(
 167           plugin_dispatcher_->preferences().number_of_cpu_cores);
 168     case PP_FLASHSETTING_LSORESTRICTIONS: {
 169       int32_t restrictions;
 170       int32_t result =
 171           SyncCall<PpapiPluginMsg_Flash_GetLocalDataRestrictionsReply>(BROWSER,
 172               PpapiHostMsg_Flash_GetLocalDataRestrictions(), &restrictions);
 173       if (result != PP_OK)
 174         return PP_MakeInt32(PP_FLASHLSORESTRICTIONS_NONE);
 175       return PP_MakeInt32(restrictions);
 176     }
 177   }
 178   return PP_MakeUndefined();
 179 }
 180
 181 void FlashResource::SetInstanceAlwaysOnTop(PP_Instance instance,
 182                                            PP_Bool on_top) {
 183   Post(RENDERER, PpapiHostMsg_Flash_SetInstanceAlwaysOnTop(PP_ToBool(on_top)));
 184 }
 185
 186 PP_Bool FlashResource::DrawGlyphs(
 187     PP_Instance instance,
 188     PP_Resource pp_image_data,
 189     const PP_BrowserFont_Trusted_Description* font_desc,
 190     uint32_t color,
 191     const PP_Point* position,
 192     const PP_Rect* clip,
 193     const float transformation[3][3],
 194     PP_Bool allow_subpixel_aa,
 195     uint32_t glyph_count,
 196     const uint16_t glyph_indices[],
 197     const PP_Point glyph_advances[]) {
 198   EnterResourceNoLock<thunk::PPB_ImageData_API> enter(pp_image_data, true);
 199   if (enter.failed())
 200     return PP_FALSE;
 201   // The instance parameter isn't strictly necessary but we check that it
 202   // matches anyway.
 203   if (enter.resource()->pp_instance() != instance)
 204     return PP_FALSE;
 205
 206   PPBFlash_DrawGlyphs_Params params;
 207   params.image_data = enter.resource()->host_resource();
 208   params.font_desc.SetFromPPBrowserFontDescription(*font_desc);
 209   params.color = color;
 210   params.position = *position;
 211   params.clip = *clip;
 212   for (int i = 0; i < 3; i++) {
 213     for (int j = 0; j < 3; j++)
 214       params.transformation[i][j] = transformation[i][j];
 215   }
 216   params.allow_subpixel_aa = allow_subpixel_aa;
 217
 218   params.glyph_indices.insert(params.glyph_indices.begin(),
 219                               &glyph_indices[0],
 220                               &glyph_indices[glyph_count]);
 221   params.glyph_advances.insert(params.glyph_advances.begin(),
 222                                &glyph_advances[0],
 223                                &glyph_advances[glyph_count]);
 224
 225   // This has to be synchronous because the caller may want to composite on
 226   // top of the resulting text after the call is complete.
 227   int32_t result = SyncCall<IPC::Message>(RENDERER,
 228       PpapiHostMsg_Flash_DrawGlyphs(params));
 229   return PP_FromBool(result == PP_OK);
 230 }
 231
 232 int32_t FlashResource::Navigate(PP_Instance instance,
 233                                 PP_Resource request_info,
 234                                 const char* target,
 235                                 PP_Bool from_user_action) {
 236   EnterResourceNoLock<thunk::PPB_URLRequestInfo_API> enter(request_info,
 237                                                                   true);
 238   if (enter.failed())
 239     return PP_ERROR_BADRESOURCE;
 240   return SyncCall<IPC::Message>(RENDERER, PpapiHostMsg_Flash_Navigate(
 241       enter.object()->GetData(), target, PP_ToBool(from_user_action)));
 242 }
 243
 244 PP_Bool FlashResource::IsRectTopmost(PP_Instance instance,
 245                                      const PP_Rect* rect) {
 246   int32_t result = SyncCall<IPC::Message>(RENDERER,
 247       PpapiHostMsg_Flash_IsRectTopmost(*rect));
 248   return PP_FromBool(result == PP_OK);
 249 }
 250
 251 void FlashResource::InvokePrinting(PP_Instance instance) {
 252   Post(RENDERER, PpapiHostMsg_Flash_InvokePrinting());
 253 }
 254
 255 }  // namespace proxy
 256 }  // namespace ppapi