| // Copyright (c) 2012 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 "ppapi/proxy/ppp_printing_proxy.h" |
| |
| #include <string.h> |
| |
| #include "base/numerics/safe_conversions.h" |
| #include "build/build_config.h" |
| #include "ppapi/c/dev/ppp_printing_dev.h" |
| #include "ppapi/proxy/host_dispatcher.h" |
| #include "ppapi/proxy/plugin_dispatcher.h" |
| #include "ppapi/proxy/plugin_resource_tracker.h" |
| #include "ppapi/proxy/ppapi_messages.h" |
| #include "ppapi/shared_impl/ppapi_globals.h" |
| #include "ppapi/shared_impl/proxy_lock.h" |
| #include "ppapi/shared_impl/resource_tracker.h" |
| |
| namespace ppapi { |
| namespace proxy { |
| |
| namespace { |
| |
| #if !defined(OS_NACL) |
| bool HasPrintingPermission(PP_Instance instance) { |
| Dispatcher* dispatcher = HostDispatcher::GetForInstance(instance); |
| if (!dispatcher) |
| return false; |
| return dispatcher->permissions().HasPermission(PERMISSION_DEV); |
| } |
| |
| uint32_t QuerySupportedFormats(PP_Instance instance) { |
| if (!HasPrintingPermission(instance)) |
| return 0; |
| uint32_t result = 0; |
| HostDispatcher::GetForInstance(instance)->Send( |
| new PpapiMsg_PPPPrinting_QuerySupportedFormats(API_ID_PPP_PRINTING, |
| instance, &result)); |
| return result; |
| } |
| |
| int32_t Begin(PP_Instance instance, |
| const PP_PrintSettings_Dev* print_settings) { |
| if (!HasPrintingPermission(instance)) |
| return 0; |
| |
| int32_t result = 0; |
| HostDispatcher::GetForInstance(instance)->Send(new PpapiMsg_PPPPrinting_Begin( |
| API_ID_PPP_PRINTING, instance, *print_settings, &result)); |
| return result; |
| } |
| |
| PP_Resource PrintPages(PP_Instance instance, |
| const PP_PrintPageNumberRange_Dev* page_ranges, |
| uint32_t page_range_count) { |
| if (!HasPrintingPermission(instance)) |
| return 0; |
| std::vector<PP_PrintPageNumberRange_Dev> pages( |
| page_ranges, page_ranges + page_range_count); |
| |
| HostResource result; |
| HostDispatcher::GetForInstance(instance)->Send( |
| new PpapiMsg_PPPPrinting_PrintPages(API_ID_PPP_PRINTING, |
| instance, pages, &result)); |
| |
| // Explicilty don't add a reference to the received resource here. The plugin |
| // adds a ref during creation of the resource and it will "abandon" the |
| // resource to release it, which ensures that the initial ref won't be |
| // decremented. See the comment below in OnPluginMsgPrintPages. |
| |
| return result.host_resource(); |
| } |
| |
| void End(PP_Instance instance) { |
| if (!HasPrintingPermission(instance)) |
| return; |
| HostDispatcher::GetForInstance(instance)->Send( |
| new PpapiMsg_PPPPrinting_End(API_ID_PPP_PRINTING, instance)); |
| } |
| |
| PP_Bool IsScalingDisabled(PP_Instance instance) { |
| if (!HasPrintingPermission(instance)) |
| return PP_FALSE; |
| bool result = false; |
| HostDispatcher::GetForInstance(instance)->Send( |
| new PpapiMsg_PPPPrinting_IsScalingDisabled(API_ID_PPP_PRINTING, |
| instance, &result)); |
| return PP_FromBool(result); |
| } |
| |
| const PPP_Printing_Dev ppp_printing_interface = { |
| &QuerySupportedFormats, |
| &Begin, |
| &PrintPages, |
| &End, |
| &IsScalingDisabled |
| }; |
| #else |
| // The NaCl plugin doesn't need the host side interface - stub it out. |
| static const PPP_Printing_Dev ppp_printing_interface = {}; |
| #endif // !defined(OS_NACL) |
| |
| } // namespace |
| |
| PPP_Printing_Proxy::PPP_Printing_Proxy(Dispatcher* dispatcher) |
| : InterfaceProxy(dispatcher), |
| ppp_printing_impl_(NULL) { |
| if (dispatcher->IsPlugin()) { |
| ppp_printing_impl_ = static_cast<const PPP_Printing_Dev*>( |
| dispatcher->local_get_interface()(PPP_PRINTING_DEV_INTERFACE)); |
| } |
| } |
| |
| PPP_Printing_Proxy::~PPP_Printing_Proxy() { |
| } |
| |
| // static |
| const PPP_Printing_Dev* PPP_Printing_Proxy::GetProxyInterface() { |
| return &ppp_printing_interface; |
| } |
| |
| bool PPP_Printing_Proxy::OnMessageReceived(const IPC::Message& msg) { |
| if (!dispatcher()->IsPlugin()) |
| return false; |
| |
| bool handled = true; |
| IPC_BEGIN_MESSAGE_MAP(PPP_Printing_Proxy, msg) |
| IPC_MESSAGE_HANDLER(PpapiMsg_PPPPrinting_QuerySupportedFormats, |
| OnPluginMsgQuerySupportedFormats) |
| IPC_MESSAGE_HANDLER(PpapiMsg_PPPPrinting_Begin, |
| OnPluginMsgBegin) |
| IPC_MESSAGE_HANDLER(PpapiMsg_PPPPrinting_PrintPages, |
| OnPluginMsgPrintPages) |
| IPC_MESSAGE_HANDLER(PpapiMsg_PPPPrinting_End, |
| OnPluginMsgEnd) |
| IPC_MESSAGE_HANDLER(PpapiMsg_PPPPrinting_IsScalingDisabled, |
| OnPluginMsgIsScalingDisabled) |
| IPC_MESSAGE_UNHANDLED(handled = false) |
| IPC_END_MESSAGE_MAP() |
| return handled; |
| } |
| |
| void PPP_Printing_Proxy::OnPluginMsgQuerySupportedFormats(PP_Instance instance, |
| uint32_t* result) { |
| if (ppp_printing_impl_) { |
| *result = CallWhileUnlocked(ppp_printing_impl_->QuerySupportedFormats, |
| instance); |
| } else { |
| *result = 0; |
| } |
| } |
| |
| void PPP_Printing_Proxy::OnPluginMsgBegin(PP_Instance instance, |
| const PP_PrintSettings_Dev& settings, |
| int32_t* result) { |
| if (!ppp_printing_impl_) { |
| *result = 0; |
| return; |
| } |
| |
| *result = CallWhileUnlocked(ppp_printing_impl_->Begin, instance, &settings); |
| } |
| |
| void PPP_Printing_Proxy::OnPluginMsgPrintPages( |
| PP_Instance instance, |
| const std::vector<PP_PrintPageNumberRange_Dev>& pages, |
| HostResource* result) { |
| if (!ppp_printing_impl_ || pages.empty()) |
| return; |
| |
| PP_Resource plugin_resource = CallWhileUnlocked( |
| ppp_printing_impl_->PrintPages, |
| instance, &pages[0], base::checked_cast<uint32_t>(pages.size())); |
| ResourceTracker* resource_tracker = PpapiGlobals::Get()->GetResourceTracker(); |
| Resource* resource_object = resource_tracker->GetResource(plugin_resource); |
| if (!resource_object) |
| return; |
| |
| *result = resource_object->host_resource(); |
| |
| // Abandon the resource on the plugin side. This releases a reference to the |
| // resource and allows the plugin side of the resource (the proxy resource) to |
| // be destroyed without sending a message to the renderer notifing it that the |
| // plugin has released the resource. This used to call |
| // ResourceTracker::ReleaseResource directly which would trigger an IPC to be |
| // sent to the renderer to remove a ref to the resource. However due to |
| // arbitrary ordering of received sync/async IPCs in the renderer, this |
| // sometimes resulted in the resource being destroyed in the renderer before |
| // the renderer had a chance to add a reference to it. See crbug.com/490611. |
| static_cast<PluginResourceTracker*>(resource_tracker) |
| ->AbandonResource(plugin_resource); |
| } |
| |
| void PPP_Printing_Proxy::OnPluginMsgEnd(PP_Instance instance) { |
| if (ppp_printing_impl_) |
| CallWhileUnlocked(ppp_printing_impl_->End, instance); |
| } |
| |
| void PPP_Printing_Proxy::OnPluginMsgIsScalingDisabled(PP_Instance instance, |
| bool* result) { |
| if (ppp_printing_impl_) { |
| *result = PP_ToBool(CallWhileUnlocked(ppp_printing_impl_->IsScalingDisabled, |
| instance)); |
| } else { |
| *result = false; |
| } |
| } |
| |
| } // namespace proxy |
| } // namespace ppapi |