Index: components/translate/content/renderer/data_file_renderer_cld_data_provider.cc |
diff --git a/components/translate/content/renderer/data_file_renderer_cld_data_provider.cc b/components/translate/content/renderer/data_file_renderer_cld_data_provider.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..b79bd3022656e1be116e60aeda37214676dc2aba |
--- /dev/null |
+++ b/components/translate/content/renderer/data_file_renderer_cld_data_provider.cc |
@@ -0,0 +1,111 @@ |
+// Copyright 2014 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 "data_file_renderer_cld_data_provider.h" |
+ |
+#include "base/basictypes.h" |
+#include "base/files/file.h" |
+#include "base/files/memory_mapped_file.h" |
+#include "base/lazy_instance.h" |
+#include "components/translate/content/common/data_file_cld_data_provider_messages.h" |
+#include "ipc/ipc_message_macros.h" |
+#include "ipc/ipc_platform_file.h" |
+#include "third_party/cld_2/src/public/compact_lang_det.h" |
+ |
+namespace content { |
+// The mmap for the CLD2 data must be held forever once it is available in the |
+// process. This is declared static in the translate_helper.h. |
+base::LazyInstance<DataFileRendererCldDataProvider::CLDMmapWrapper>::Leaky |
+ DataFileRendererCldDataProvider::s_cld_mmap_ = LAZY_INSTANCE_INITIALIZER; |
+} // namespace |
Takashi Toyoshima
2014/06/19 10:20:35
remove line 21 - 23
Andrew Hayden (chromium.org)
2014/06/19 13:40:20
Whoops. Done.
|
+ |
+namespace content { |
+ |
+DataFileRendererCldDataProvider::DataFileRendererCldDataProvider( |
+ content::RenderViewObserver* render_view_observer) |
+ : render_view_observer (render_view_observer) { |
+} |
+ |
+bool DataFileRendererCldDataProvider::OnMessageReceived( |
+ const IPC::Message& message) { |
+ bool handled = true; |
+ IPC_BEGIN_MESSAGE_MAP(DataFileRendererCldDataProvider, message) |
+ IPC_MESSAGE_HANDLER(ChromeViewMsg_CldDataFileAvailable, OnCldDataAvailable) |
+ IPC_MESSAGE_UNHANDLED(handled = false) |
+ IPC_END_MESSAGE_MAP() |
+ return handled; |
+} |
+ |
+void DataFileRendererCldDataProvider::SendCldDataRequest() { |
+ // Else, send the IPC message to the browser process requesting the data... |
+ render_view_observer->Send(new ChromeViewHostMsg_NeedCldDataFile( |
+ render_view_observer->routing_id())); |
+} |
+ |
+bool DataFileRendererCldDataProvider::IsCldDataAvailable() { |
+ // This neatly removes the need for code that depends on the generalized |
+ // RendererCldDataProvider to #ifdef on CLD2_DYNAMIC_MODE |
+ return CLD2::isDataLoaded(); // ground truth, independent of our state. |
+} |
+ |
+void DataFileRendererCldDataProvider::SetCldAvailableCallback( |
+ base::Callback<void(void)> callback) { |
+ cld_available_callback = callback; |
+} |
+ |
+void DataFileRendererCldDataProvider::OnCldDataAvailable( |
+ const IPC::PlatformFileForTransit ipc_file_handle, |
+ const uint64 data_offset, |
+ const uint64 data_length) { |
+ LoadCldData(IPC::PlatformFileForTransitToFile(ipc_file_handle), |
+ data_offset, |
+ data_length); |
+} |
+ |
+void DataFileRendererCldDataProvider::LoadCldData( |
+ base::File file, |
+ const uint64 data_offset, |
+ const uint64 data_length) { |
+ |
+ // Terminate immediately if data is already loaded. |
+ if (IsCldDataAvailable()) |
+ return; |
+ |
+ if (!file.IsValid()) { |
+ LOG(ERROR) << "Can't find the CLD data file."; |
+ return; |
+ } |
+ |
+ // mmap the file |
+ s_cld_mmap_.Get().value = new base::MemoryMappedFile(); |
+ bool initialized = s_cld_mmap_.Get().value->Initialize(file.Pass()); |
+ if (!initialized) { |
+ LOG(ERROR) << "mmap initialization failed"; |
+ delete s_cld_mmap_.Get().value; |
+ s_cld_mmap_.Get().value = NULL; |
+ return; |
+ } |
+ |
+ // Sanity checks |
+ uint64 max_int32 = std::numeric_limits<int32>::max(); |
+ if (data_length + data_offset > s_cld_mmap_.Get().value->length() |
+ || data_length > max_int32) { // max signed 32 bit integer |
+ LOG(ERROR) << "Illegal mmap config: data_offset=" |
+ << data_offset << ", data_length=" << data_length |
+ << ", mmap->length()=" << s_cld_mmap_.Get().value->length(); |
+ delete s_cld_mmap_.Get().value; |
+ s_cld_mmap_.Get().value = NULL; |
+ return; |
+ } |
+ |
+ // Initialize the CLD subsystem... and it's all done! |
+ const uint8* data_ptr = s_cld_mmap_.Get().value->data() + data_offset; |
+ CLD2::loadDataFromRawAddress(data_ptr, data_length); |
+ DCHECK(CLD2::isDataLoaded()) << "Failed to load CLD data from mmap"; |
+ if (!cld_available_callback.is_null()) { |
+ cld_available_callback.Run(); |
+ } |
+} |
+ |
+} // namespace content |