| // 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 "content/browser/renderer_host/pepper/pepper_browser_font_singleton_host.h" |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include "base/macros.h" |
| #include "base/values.h" |
| #include "content/common/font_list.h" |
| #include "content/public/browser/browser_ppapi_host.h" |
| #include "ppapi/host/dispatch_host_message.h" |
| #include "ppapi/host/resource_message_filter.h" |
| #include "ppapi/proxy/ppapi_messages.h" |
| |
| namespace content { |
| |
| namespace { |
| |
| // Handles the font list request on the blocking pool. |
| class FontMessageFilter : public ppapi::host::ResourceMessageFilter { |
| public: |
| FontMessageFilter(); |
| |
| // ppapi::host::ResourceMessageFilter implementation. |
| scoped_refptr<base::TaskRunner> OverrideTaskRunnerForMessage( |
| const IPC::Message& msg) override; |
| int32_t OnResourceMessageReceived( |
| const IPC::Message& msg, |
| ppapi::host::HostMessageContext* context) override; |
| |
| private: |
| ~FontMessageFilter() override; |
| |
| // Message handler. |
| int32_t OnHostMsgGetFontFamilies(ppapi::host::HostMessageContext* context); |
| |
| DISALLOW_COPY_AND_ASSIGN(FontMessageFilter); |
| }; |
| |
| FontMessageFilter::FontMessageFilter() {} |
| |
| FontMessageFilter::~FontMessageFilter() {} |
| |
| scoped_refptr<base::TaskRunner> FontMessageFilter::OverrideTaskRunnerForMessage( |
| const IPC::Message& msg) { |
| // Use the font list SequencedTaskRunner to get the font list (currently the |
| // only message) since getting the font list is non-threadsafe on Linux (for |
| // versions of Pango predating 2013). |
| return GetFontListTaskRunner(); |
| } |
| |
| int32_t FontMessageFilter::OnResourceMessageReceived( |
| const IPC::Message& msg, |
| ppapi::host::HostMessageContext* context) { |
| PPAPI_BEGIN_MESSAGE_MAP(FontMessageFilter, msg) |
| PPAPI_DISPATCH_HOST_RESOURCE_CALL_0( |
| PpapiHostMsg_BrowserFontSingleton_GetFontFamilies, |
| OnHostMsgGetFontFamilies) |
| PPAPI_END_MESSAGE_MAP() |
| return PP_ERROR_FAILED; |
| } |
| |
| int32_t FontMessageFilter::OnHostMsgGetFontFamilies( |
| ppapi::host::HostMessageContext* context) { |
| // OK to use "slow blocking" version since we're on the blocking pool. |
| std::unique_ptr<base::ListValue> list(GetFontList_SlowBlocking()); |
| |
| std::string output; |
| for (size_t i = 0; i < list->GetSize(); i++) { |
| base::ListValue* cur_font; |
| if (!list->GetList(i, &cur_font)) |
| continue; |
| |
| // Each entry is actually a list of (font name, localized name). |
| // We only care about the regular name. |
| std::string font_name; |
| if (!cur_font->GetString(0, &font_name)) |
| continue; |
| |
| // Font names are separated with nulls. We also want an explicit null at |
| // the end of the string (Pepper strings aren't null terminated so since |
| // we specify there will be a null, it should actually be in the string). |
| output.append(font_name); |
| output.push_back(0); |
| } |
| |
| context->reply_msg = |
| PpapiPluginMsg_BrowserFontSingleton_GetFontFamiliesReply(output); |
| return PP_OK; |
| } |
| |
| } // namespace |
| |
| PepperBrowserFontSingletonHost::PepperBrowserFontSingletonHost( |
| BrowserPpapiHost* host, |
| PP_Instance instance, |
| PP_Resource resource) |
| : ResourceHost(host->GetPpapiHost(), instance, resource) { |
| AddFilter(scoped_refptr<ppapi::host::ResourceMessageFilter>( |
| new FontMessageFilter())); |
| } |
| |
| PepperBrowserFontSingletonHost::~PepperBrowserFontSingletonHost() {} |
| |
| } // namespace content |