printing/printing_utils.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "printing/printing_utils.h"
   6
   7 #include <stddef.h>
   8
   9 #include <algorithm>
  10
  11 #include "base/logging.h"
  12 #include "base/strings/string_util.h"
  13 #include "base/strings/utf_string_conversions.h"
  14 #include "third_party/icu/source/common/unicode/uchar.h"
  15 #include "ui/gfx/text_elider.h"
  16
  17 namespace printing {
  18
  19 namespace {
  20
  21 const size_t kMaxDocumentTitleLength = 80;
  22
  23 }  // namespace
  24
  25 base::string16 SimplifyDocumentTitleWithLength(const base::string16& title,
  26                                                size_t length) {
  27   base::string16 no_controls(title);
  28   no_controls.erase(
  29       std::remove_if(no_controls.begin(), no_controls.end(), &u_iscntrl),
  30       no_controls.end());
  31   base::ReplaceChars(no_controls, base::ASCIIToUTF16("\\"),
  32                      base::ASCIIToUTF16("_"), &no_controls);
  33   base::string16 result;
  34   gfx::ElideString(no_controls, length, &result);
  35   return result;
  36 }
  37
  38 base::string16 FormatDocumentTitleWithOwnerAndLength(
  39     const base::string16& owner,
  40     const base::string16& title,
  41     size_t length) {
  42   const base::string16 separator = base::ASCIIToUTF16(": ");
  43   DCHECK_LT(separator.size(), length);
  44
  45   base::string16 short_title =
  46       SimplifyDocumentTitleWithLength(owner, length - separator.size());
  47   short_title += separator;
  48   if (short_title.size() < length) {
  49     short_title +=
  50         SimplifyDocumentTitleWithLength(title, length - short_title.size());
  51   }
  52
  53   return short_title;
  54 }
  55
  56 base::string16 SimplifyDocumentTitle(const base::string16& title) {
  57   return SimplifyDocumentTitleWithLength(title, kMaxDocumentTitleLength);
  58 }
  59
  60 base::string16 FormatDocumentTitleWithOwner(const base::string16& owner,
  61                                             const base::string16& title) {
  62   return FormatDocumentTitleWithOwnerAndLength(owner, title,
  63                                                kMaxDocumentTitleLength);
  64 }
  65
  66 }  // namespace printing