Review request: fix issue 6099 -- bad display of multi-line English message in pop ups

chrome/common/l10n_util.cc

 // Copyright (c) 2006-2008 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 "build/build_config.h"
 
 #include "chrome/common/l10n_util.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
@@ skipping 484 matching lines @@
     // Check only for Arabic and Hebrew languages now.
     if (strcmp(lang, "ar") == 0 || strcmp(lang, "he") == 0) {
       g_text_direction = RIGHT_TO_LEFT;
     } else {
       g_text_direction = LEFT_TO_RIGHT;
     }
   }
   return g_text_direction;
 }
 
+TextDirection GetFirstStrongCharacterDirection(const std::wstring& text) {
+#if defined(WCHAR_T_IS_UTF32)
+  string16 text_utf16 = WideToUTF16(text);
+  const UChar* string = text_utf16.c_str();
+#else
+  const UChar* string = text.c_str();
+#endif
+  size_t length = text.length();
+  size_t position = 0;
+  while (position < length) {
+    UChar32 character;
+    size_t next_position = position;
+    U16_NEXT(string, next_position, length, character);
+
+    // Now that we have the character, we use ICU in order to query for the
+    // appropriate Unicode BiDi character type.
+    int32_t property = u_getIntPropertyValue(character, UCHAR_BIDI_CLASS);
+    if ((property == U_RIGHT_TO_LEFT) ||
+        (property == U_RIGHT_TO_LEFT_ARABIC) ||
+        (property == U_RIGHT_TO_LEFT_EMBEDDING) ||
+        (property == U_RIGHT_TO_LEFT_OVERRIDE)) {
+      return RIGHT_TO_LEFT;
+    } else if ((property == U_LEFT_TO_RIGHT) ||
+               (property == U_LEFT_TO_RIGHT_EMBEDDING) ||
+               (property == U_LEFT_TO_RIGHT_OVERRIDE)) {
+      return LEFT_TO_RIGHT;
+    }
+
+    position = next_position;
+  }
+
+  return LEFT_TO_RIGHT;
+}
+
 bool AdjustStringForLocaleDirection(const std::wstring& text,
                                     std::wstring* localized_text) {
   if (GetTextDirection() == LEFT_TO_RIGHT || text.length() == 0)
     return false;
 
   // Marking the string as LTR if the locale is RTL and the string does not
   // contain strong RTL characters. Otherwise, mark the string as RTL.
   *localized_text = text;
   bool has_rtl_chars = StringContainsStrongRTLChars(text);
   if (!has_rtl_chars)
@@ skipping 209 matching lines @@
 }
 
 void BiDiLineIterator::GetLogicalRun(int start,
                                      int* end,
                                      UBiDiLevel* level) {
   DCHECK(bidi_ != NULL);
   ubidi_getLogicalRun(bidi_, start, end, level);
 }
 
 }