This CL contains the back-end implementation of the translate feature. It adds a Translate method to the renderer.

On invocation this method triggers a traversal of the DOM page to retrieve the text nodes.  The text node contents are then sent to the browser for actual translation (at this point, we just up-case the text for testing purpose).
The browser sends back the translated text to the renderer that replace the DOM text node values with the translated text.

BUG=None
TEST=Run the unit-tests.
Review URL: http://codereview.chromium.org/547013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@36258 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 10 insertions, 2 deletions

diff --git a/base/string_util.h b/base/string_util.h
index dd0f8c1..c895f27 100644
--- a/base/string_util.h
+++ b/base/string_util.h
@@ -30,16 +30,19 @@ namespace base {
 // are listed below.  These functions are then implemented as inline calls
 // to the platform-specific equivalents in the platform-specific headers.
 
-// Compare the two strings s1 and s2 without regard to case using
+// Compares the two strings s1 and s2 without regard to case using
 // the current locale; returns 0 if they are equal, 1 if s1 > s2, and -1 if
 // s2 > s1 according to a lexicographic comparison.
 int strcasecmp(const char* s1, const char* s2);
 
-// Compare up to count characters of s1 and s2 without regard to case using
+// Compares up to count characters of s1 and s2 without regard to case using
 // the current locale; returns 0 if they are equal, 1 if s1 > s2, and -1 if
 // s2 > s1 according to a lexicographic comparison.
 int strncasecmp(const char* s1, const char* s2, size_t count);
 
+// Same as strncmp but for char16 strings.
+int strncmp16(const char16* s1, const char16* s2, size_t count);
+
 // Wrapper for vsnprintf that always null-terminates and always returns the
 // number of characters that would be in an untruncated formatted
 // string, even when truncation occurs.
@@ -196,6 +199,11 @@ string16 CollapseWhitespace(const string16& text,
 std::string CollapseWhitespaceASCII(const std::string& text,
                                     bool trim_sequences_with_line_breaks);
 
+// Returns true if the passed string is empty or contains only white-space
+// characters.
+bool ContainsOnlyWhitespaceASCII(const std::string& str);
+bool ContainsOnlyWhitespace(const string16& str);
+
 // These convert between ASCII (7-bit) and Wide/UTF16 strings.
 std::string WideToASCII(const std::wstring& wide);
 std::wstring ASCIIToWide(const base::StringPiece& ascii);