Simplify document title for Windows printing.

printing/backend/win_helper.cc

 // Copyright (c) 2012 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 "printing/backend/win_helper.h"
 
 #include <algorithm>
 
 #include "base/file_path.h"
 #include "base/file_version_info.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/utf_string_conversions.h"
 #include "printing/backend/print_backend.h"
 #include "printing/backend/print_backend_consts.h"
+#include "third_party/icu/public/common/unicode/uchar.h"
+#include "ui/base/text/text_elider.h"
 
 namespace {
+
+const wchar_t kDefaultDocumentTitle[] = L"Untitled Document";
+const int kMaxDocumentTitleLength = 25;
+
 typedef HRESULT (WINAPI* PTOpenProviderProc)(PCWSTR printer_name,
                                              DWORD version,
                                              HPTPROVIDER* provider);
 typedef HRESULT (WINAPI* PTGetPrintCapabilitiesProc)(HPTPROVIDER provider,
                                                      IStream* print_ticket,
                                                      IStream* capabilities,
                                                      BSTR* error_message);
 typedef HRESULT (WINAPI* PTConvertDevModeToPrintTicketProc)(
     HPTPROVIDER provider,
     ULONG devmode_size_in_bytes,
@@ skipping 341 matching lines @@
 
   for (size_t i = 0; i < arraysize(info); ++i) {
     std::replace(info[i].begin(), info[i].end(), ';', ',');
     driver_info.append(info[i]);
     if (i < arraysize(info) - 1)
       driver_info.append(";");
   }
   return driver_info;
 }
 
+string16 SimplifyDocumentTitle(const string16& title) {

[Albert Bodenhamer, 2012/09/19 18:37:10]

Consider moving this into PrintBackend and doing the same filtering on other
platforms.  I don't see a reason to limit the filtering to Windows (I could
imagine other platforms having the same issue)

+  string16 no_controls(title);
+  no_controls.erase(
+    std::remove_if(no_controls.begin(), no_controls.end(), &u_iscntrl),
+    no_controls.end());
+  string16 result;
+  ui::ElideString(no_controls, kMaxDocumentTitleLength, &result);
+  if (!result.empty())
+    return result;
+  // There is localized string in chrome/app/generated_resources.grd, but case
+  // is unusual and we don't want make printing depend of chrome/app.
+  return kDefaultDocumentTitle;
+}
+
 }  // namespace printing