[chromium-reviews] Add getLanguage function to tabs extension

chrome/browser/renderer_host/render_view_host.cc

Index: chrome/browser/renderer_host/render_view_host.cc
===================================================================
--- chrome/browser/renderer_host/render_view_host.cc	(revision 20334)
+++ chrome/browser/renderer_host/render_view_host.cc	(working copy)
@@ -41,6 +41,8 @@
 #if defined(OS_WIN)
 // TODO(port): accessibility not yet implemented. See http://crbug.com/8288.
 #include "chrome/browser/browser_accessibility_manager.h"
+// TODO(port): The compact language detection library works only for Windows.
+#include "third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/win/cld_unicodetext.h"
 #endif
 
 using base::TimeDelta;
@@ -410,6 +412,10 @@
   Send(new ViewMsg_StopFinding(routing_id(), clear_selection));
 }
 
+void RenderViewHost::GetPageLanguage() {
+  Send(new ViewMsg_DeterminePageText(routing_id()));
+}
+
 void RenderViewHost::Zoom(PageZoom::Function function) {
   Send(new ViewMsg_Zoom(routing_id(), function));
 }
@@ -726,6 +732,8 @@
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidFailProvisionalLoadWithError,
                         OnMsgDidFailProvisionalLoadWithError)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Find_Reply, OnMsgFindReply)
+    IPC_MESSAGE_HANDLER(ViewMsg_DeterminePageText_Reply,
+                        OnDeterminePageTextReply)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateFavIconURL, OnMsgUpdateFavIconURL)
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidDownloadFavIcon, OnMsgDidDownloadFavIcon)
     IPC_MESSAGE_HANDLER(ViewHostMsg_ContextMenu, OnMsgContextMenu)
@@ -1058,6 +1066,21 @@
   Send(new ViewMsg_FindReplyACK(routing_id()));
 }
 
+void RenderViewHost::OnDeterminePageTextReply(
+    const std::wstring& page_text) {
+#if defined(OS_WIN) // Only for windows.
+    int num_languages = 0;
+    bool is_reliable = false;
+    const char* language_char = LanguageName(DetectLanguageOfUnicodeText(
+        page_text.c_str(), true, &is_reliable, &num_languages, NULL));
+    std::string language(language_char);
+    NotificationService::current()->Notify(
+        NotificationType::TAB_LANGUAGE_DETERMINED,
+        Source<RenderViewHost>(this),
+        Details<std::string>(&language));
+#endif
+}
+
 void RenderViewHost::OnMsgUpdateFavIconURL(int32 page_id,
                                            const GURL& icon_url) {
   RenderViewHostDelegate::FavIcon* favicon_delegate =