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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "webkit/plugins/ppapi/host_globals.h"
#include <limits>
#include "base/logging.h"
#include "base/rand_util.h"
#include "ppapi/shared_impl/api_id.h"
#include "ppapi/shared_impl/function_group_base.h"
#include "ppapi/shared_impl/id_assignment.h"
#include "webkit/plugins/ppapi/plugin_module.h"
#include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
#include "webkit/plugins/ppapi/ppb_cursor_control_impl.h"
#include "webkit/plugins/ppapi/ppb_flash_clipboard_impl.h"
#include "webkit/plugins/ppapi/ppb_font_impl.h"
#include "webkit/plugins/ppapi/ppb_text_input_impl.h"
#include "webkit/plugins/ppapi/resource_creation_impl.h"
using ppapi::CheckIdType;
using ppapi::MakeTypedId;
using ppapi::PPIdType;
namespace webkit {
namespace ppapi {
struct HostGlobals::InstanceData {
InstanceData() : instance(0) {}
// Non-owning pointer to the instance object. When a PluginInstance is
// destroyed, it will notify us and we'll delete all associated data.
PluginInstance* instance;
// Lazily allocated function proxies for the different interfaces.
scoped_ptr< ::ppapi::FunctionGroupBase >
function_proxies[::ppapi::API_ID_COUNT];
};
HostGlobals* HostGlobals::host_globals_ = NULL;
HostGlobals::HostGlobals() : ::ppapi::PpapiGlobals() {
DCHECK(!host_globals_);
host_globals_ = this;
}
HostGlobals::~HostGlobals() {
DCHECK(host_globals_ == this);
host_globals_ = NULL;
}
::ppapi::ResourceTracker* HostGlobals::GetResourceTracker() {
return &resource_tracker_;
}
::ppapi::VarTracker* HostGlobals::GetVarTracker() {
return &host_var_tracker_;
}
::ppapi::CallbackTracker* HostGlobals::GetCallbackTrackerForInstance(
PP_Instance instance) {
std::map<PP_Instance, linked_ptr<InstanceData> >::iterator found =
instance_map_.find(instance);
if (found == instance_map_.end())
return NULL;
return found->second->instance->module()->GetCallbackTracker();
}
::ppapi::FunctionGroupBase* HostGlobals::GetFunctionAPI(PP_Instance pp_instance,
::ppapi::ApiID id) {
// Get the instance object. This also ensures that the instance data is in
// the map, since we need it below.
PluginInstance* instance = GetInstance(pp_instance);
if (!instance)
return NULL;
// The instance one is special, since it's just implemented by the instance
// object.
if (id == ::ppapi::API_ID_PPB_INSTANCE)
return instance;
scoped_ptr< ::ppapi::FunctionGroupBase >& proxy =
instance_map_[pp_instance]->function_proxies[id];
if (proxy.get())
return proxy.get();
switch (id) {
case ::ppapi::API_ID_PPB_CURSORCONTROL:
proxy.reset(new PPB_CursorControl_Impl(instance));
break;
case ::ppapi::API_ID_PPB_FONT:
proxy.reset(new PPB_Font_FunctionImpl(instance));
break;
case ::ppapi::API_ID_PPB_TEXT_INPUT:
proxy.reset(new PPB_TextInput_Impl(instance));
break;
case ::ppapi::API_ID_RESOURCE_CREATION:
proxy.reset(new ResourceCreationImpl(instance));
break;
case ::ppapi::API_ID_PPB_FLASH_CLIPBOARD:
proxy.reset(new PPB_Flash_Clipboard_Impl(instance));
break;
default:
NOTREACHED();
}
return proxy.get();
}
PP_Module HostGlobals::GetModuleForInstance(PP_Instance instance) {
PluginInstance* inst = GetInstance(instance);
if (!inst)
return 0;
return inst->module()->pp_module();
}
PP_Module HostGlobals::AddModule(PluginModule* module) {
#ifndef NDEBUG
// Make sure we're not adding one more than once.
for (ModuleMap::const_iterator i = module_map_.begin();
i != module_map_.end(); ++i)
DCHECK(i->second != module);
#endif
// See AddInstance.
PP_Module new_module;
do {
new_module = MakeTypedId(static_cast<PP_Module>(base::RandUint64()),
::ppapi::PP_ID_TYPE_MODULE);
} while (!new_module ||
module_map_.find(new_module) != module_map_.end());
module_map_[new_module] = module;
return new_module;
}
void HostGlobals::ModuleDeleted(PP_Module module) {
DLOG_IF(ERROR, !CheckIdType(module, ::ppapi::PP_ID_TYPE_MODULE))
<< module << " is not a PP_Module.";
ModuleMap::iterator found = module_map_.find(module);
if (found == module_map_.end()) {
NOTREACHED();
return;
}
module_map_.erase(found);
}
PluginModule* HostGlobals::GetModule(PP_Module module) {
DLOG_IF(ERROR, !CheckIdType(module, ::ppapi::PP_ID_TYPE_MODULE))
<< module << " is not a PP_Module.";
ModuleMap::iterator found = module_map_.find(module);
if (found == module_map_.end())
return NULL;
return found->second;
}
PP_Instance HostGlobals::AddInstance(PluginInstance* instance) {
DCHECK(instance_map_.find(instance->pp_instance()) == instance_map_.end());
// Use a random number for the instance ID. This helps prevent some
// accidents. See also AddModule below.
//
// Need to make sure the random number isn't a duplicate or 0.
PP_Instance new_instance;
do {
new_instance = MakeTypedId(static_cast<PP_Instance>(base::RandUint64()),
::ppapi::PP_ID_TYPE_INSTANCE);
} while (!new_instance ||
instance_map_.find(new_instance) != instance_map_.end() ||
!instance->module()->ReserveInstanceID(new_instance));
instance_map_[new_instance] = linked_ptr<InstanceData>(new InstanceData);
instance_map_[new_instance]->instance = instance;
resource_tracker_.DidCreateInstance(new_instance);
return new_instance;
}
void HostGlobals::InstanceDeleted(PP_Instance instance) {
resource_tracker_.DidDeleteInstance(instance);
host_var_tracker_.ForceFreeNPObjectsForInstance(instance);
instance_map_.erase(instance);
}
void HostGlobals::InstanceCrashed(PP_Instance instance) {
resource_tracker_.DidDeleteInstance(instance);
host_var_tracker_.ForceFreeNPObjectsForInstance(instance);
}
PluginInstance* HostGlobals::GetInstance(PP_Instance instance) {
DLOG_IF(ERROR, !CheckIdType(instance, ::ppapi::PP_ID_TYPE_INSTANCE))
<< instance << " is not a PP_Instance.";
InstanceMap::iterator found = instance_map_.find(instance);
if (found == instance_map_.end())
return NULL;
return found->second->instance;
}
} // namespace ppapi
} // namespace webkit
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