Don't offer to translate pages if the page says so by

using the magic Google meta-tag.

BUG=48606
TEST=See bug.

Review URL: http://codereview.chromium.org/2960001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@52097 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 25 insertions, 2 deletions

diff --git a/chrome/renderer/render_view.cc b/chrome/renderer/render_view.cc
index 1386917..7030f80 100644
--- a/chrome/renderer/render_view.cc
+++ b/chrome/renderer/render_view.cc
@@ -838,11 +838,11 @@ void RenderView::CapturePageInfo(int load_id, bool preliminary_capture) {
     std::string language = DetermineTextLanguage(contents);
     UMA_HISTOGRAM_MEDIUM_TIMES("Renderer4.LanguageDetection",
                                base::TimeTicks::Now() - begin_time);
-
+    WebKit::WebDocument document = main_frame->document();
     // Send the text to the browser for indexing (the browser might decide not
     // to index, if the URL is HTTPS for instance) and language discovery.
     Send(new ViewHostMsg_PageContents(routing_id_, url, load_id, contents,
-                                      language));
+                                      language, IsPageTranslatable(&document)));
   }
 
   OnCaptureThumbnail();
@@ -1978,6 +1978,23 @@ void RenderView::UpdateTargetURL(const GURL& url, const GURL& fallback_url) {
   }
 }
 
+bool RenderView::IsPageTranslatable(WebKit::WebDocument* document) {
+  std::vector<WebKit::WebElement> meta_elements;
+  webkit_glue::GetMetaElementsWithName(document, ASCIIToUTF16("google"),
+                                       &meta_elements);
+  std::vector<WebKit::WebElement>::const_iterator iter;
+  for (iter = meta_elements.begin(); iter != meta_elements.end(); ++iter) {
+    WebString attribute = iter->getAttribute("value");
+    if (attribute.isNull())  // We support both 'value' and 'content'.
+      attribute = iter->getAttribute("content");
+    if (attribute.isNull())
+      continue;
+    if (LowerCaseEqualsASCII(attribute, "notranslate"))
+      return false;
+  }
+  return true;
+}
+
 void RenderView::StartNavStateSyncTimerIfNecessary() {
   int delay;
   if (send_content_state_immediately_)
diff --git a/chrome/renderer/render_view.h b/chrome/renderer/render_view.h
index ea515b4..71b8693 100644
--- a/chrome/renderer/render_view.h
+++ b/chrome/renderer/render_view.h
@@ -103,6 +103,7 @@ class WebAccessibilityCache;
 class WebApplicationCacheHost;
 class WebApplicationCacheHostClient;
 class WebDataSource;
+class WebDocument;
 class WebDragData;
 class WebGeolocationServiceInterface;
 class WebImage;
@@ -933,6 +934,11 @@ class RenderView : public RenderWidget,
   // If |only_visible| is true, only forms visible in the layout are sent
   void SendPasswordForms(WebKit::WebFrame* frame, bool only_visible);
 
+  // Returns whether the page associated with |document| is a candidate for
+  // translation.  Some pages can explictly specify (via a meta-tag) that they
+  // should not be translated.
+  bool IsPageTranslatable(WebKit::WebDocument* document);
+
   // Starts nav_state_sync_timer_ if it isn't already running.
   void StartNavStateSyncTimerIfNecessary();