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 <algorithm>
   8
   9 #include "base/logging.h"
  10
  11 #include "base/strings/utf_string_conversions.h"
  12 #include "third_party/icu/source/common/unicode/uchar.h"
  13 #include "ui/gfx/text_elider.h"
  14
  15 namespace printing {
  16
  17 namespace {
  18
  19 const size_t kMaxDocumentTitleLength = 80;
  20
  21 }  // namespace
  22
  23 base::string16 SimplifyDocumentTitleWithLength(const base::string16& title,
  24                                                size_t length) {
  25   base::string16 no_controls(title);
  26   no_controls.erase(
  27       std::remove_if(no_controls.begin(), no_controls.end(), &u_iscntrl),
  28       no_controls.end());
  29   base::string16 result;
  30   gfx::ElideString(no_controls, static_cast<int>(length), &result);
  31   return result;
  32 }
  33
  34 base::string16 FormatDocumentTitleWithOwnerAndLength(
  35     const base::string16& owner,
  36     const base::string16& title,
  37     size_t length) {
  38   const base::string16 separator = base::ASCIIToUTF16(": ");
  39   DCHECK(separator.size() < length);
  40
  41   base::string16 short_title =
  42       SimplifyDocumentTitleWithLength(owner, length - separator.size());
  43   short_title += separator;
  44   if (short_title.size() < length) {
  45     short_title +=
  46         SimplifyDocumentTitleWithLength(title, length - short_title.size());
  47   }
  48
  49   return short_title;
  50 }
  51
  52 base::string16 SimplifyDocumentTitle(const base::string16& title) {
  53   return SimplifyDocumentTitleWithLength(title, kMaxDocumentTitleLength);
  54 }
  55
  56 base::string16 FormatDocumentTitleWithOwner(const base::string16& owner,
  57                                             const base::string16& title) {
  58   return FormatDocumentTitleWithOwnerAndLength(owner, title,
  59                                                kMaxDocumentTitleLength);
  60 }
  61
  62 }  // namespace printing