1// Copyright (c) 2013 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/browser/renderer_host/pepper/pepper_truetype_font_list_host.h" 6 7#include <algorithm> 8 9#include "base/numerics/safe_conversions.h" 10#include "base/threading/sequenced_worker_pool.h" 11#include "content/browser/renderer_host/pepper/pepper_truetype_font_list.h" 12#include "content/common/font_list.h" 13#include "content/public/browser/browser_ppapi_host.h" 14#include "content/public/browser/browser_thread.h" 15#include "ppapi/host/dispatch_host_message.h" 16#include "ppapi/host/host_message_context.h" 17#include "ppapi/host/resource_message_filter.h" 18#include "ppapi/proxy/ppapi_messages.h" 19 20namespace content { 21 22namespace { 23 24// Handles the font list request on the blocking pool. 25class FontMessageFilter : public ppapi::host::ResourceMessageFilter { 26 public: 27 FontMessageFilter(); 28 29 // ppapi::host::ResourceMessageFilter implementation. 30 virtual scoped_refptr<base::TaskRunner> OverrideTaskRunnerForMessage( 31 const IPC::Message& msg) OVERRIDE; 32 virtual int32_t OnResourceMessageReceived( 33 const IPC::Message& msg, 34 ppapi::host::HostMessageContext* context) OVERRIDE; 35 36 private: 37 virtual ~FontMessageFilter(); 38 39 // Message handlers. 40 int32_t OnHostMsgGetFontFamilies(ppapi::host::HostMessageContext* context); 41 int32_t OnHostMsgGetFontsInFamily(ppapi::host::HostMessageContext* context, 42 const std::string& family); 43 44 DISALLOW_COPY_AND_ASSIGN(FontMessageFilter); 45}; 46 47FontMessageFilter::FontMessageFilter() {} 48 49FontMessageFilter::~FontMessageFilter() {} 50 51scoped_refptr<base::TaskRunner> FontMessageFilter::OverrideTaskRunnerForMessage( 52 const IPC::Message& msg) { 53 // Use the blocking pool to get the font list (currently the only message) 54 // Since getting the font list is non-threadsafe on Linux (for versions of 55 // Pango predating 2013), use a sequenced task runner. 56 base::SequencedWorkerPool* pool = BrowserThread::GetBlockingPool(); 57 return pool->GetSequencedTaskRunner( 58 pool->GetNamedSequenceToken(kFontListSequenceToken)); 59} 60 61int32_t FontMessageFilter::OnResourceMessageReceived( 62 const IPC::Message& msg, 63 ppapi::host::HostMessageContext* context) { 64 PPAPI_BEGIN_MESSAGE_MAP(FontMessageFilter, msg) 65 PPAPI_DISPATCH_HOST_RESOURCE_CALL_0( 66 PpapiHostMsg_TrueTypeFontSingleton_GetFontFamilies, 67 OnHostMsgGetFontFamilies) 68 PPAPI_DISPATCH_HOST_RESOURCE_CALL( 69 PpapiHostMsg_TrueTypeFontSingleton_GetFontsInFamily, 70 OnHostMsgGetFontsInFamily) 71 PPAPI_END_MESSAGE_MAP() 72 return PP_ERROR_FAILED; 73} 74 75int32_t FontMessageFilter::OnHostMsgGetFontFamilies( 76 ppapi::host::HostMessageContext* context) { 77 // OK to use "slow blocking" version since we're on the blocking pool. 78 std::vector<std::string> font_families; 79 GetFontFamilies_SlowBlocking(&font_families); 80 // Sort the names in case the host platform returns them out of order. 81 std::sort(font_families.begin(), font_families.end()); 82 83 context->reply_msg = 84 PpapiPluginMsg_TrueTypeFontSingleton_GetFontFamiliesReply(font_families); 85 return base::checked_cast<int32_t>(font_families.size()); 86} 87 88int32_t FontMessageFilter::OnHostMsgGetFontsInFamily( 89 ppapi::host::HostMessageContext* context, 90 const std::string& family) { 91 // OK to use "slow blocking" version since we're on the blocking pool. 92 std::vector<ppapi::proxy::SerializedTrueTypeFontDesc> fonts_in_family; 93 GetFontsInFamily_SlowBlocking(family, &fonts_in_family); 94 95 context->reply_msg = 96 PpapiPluginMsg_TrueTypeFontSingleton_GetFontsInFamilyReply( 97 fonts_in_family); 98 return base::checked_cast<int32_t>(fonts_in_family.size()); 99} 100 101} // namespace 102 103PepperTrueTypeFontListHost::PepperTrueTypeFontListHost(BrowserPpapiHost* host, 104 PP_Instance instance, 105 PP_Resource resource) 106 : ResourceHost(host->GetPpapiHost(), instance, resource) { 107 AddFilter(scoped_refptr<ppapi::host::ResourceMessageFilter>( 108 new FontMessageFilter())); 109} 110 111PepperTrueTypeFontListHost::~PepperTrueTypeFontListHost() {} 112 113} // namespace content 114