sw/source/core/tox/ToxWhitespaceStripper.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  */
   9
  10 #include <ToxWhitespaceStripper.hxx>
  11
  12 #include <o3tl/safeint.hxx>
  13 #include <rtl/ustrbuf.hxx>
  14 #include <sal/log.hxx>
  15
  16
  17 namespace sw {
  18
  19 ToxWhitespaceStripper::ToxWhitespaceStripper(std::u16string_view inputString)
  20 {
  21     OUStringBuffer buffer;
  22
  23     bool lastCharacterWasWhitespace = false;
  24     for (size_t pos = 0; pos < inputString.size(); ++pos) {
  25         sal_Unicode cur = inputString[pos];
  26
  27         if (cur == ' ' || cur == '\n' || cur == '\t') {
  28             // merge consecutive whitespaces (and translate them to spaces)
  29             if (!lastCharacterWasWhitespace) {
  30                 buffer.append(' ');
  31             }
  32             lastCharacterWasWhitespace = true;
  33         }
  34         else {
  35             buffer.append(cur);
  36             lastCharacterWasWhitespace = false;
  37         }
  38         mNewPositions.push_back(buffer.getLength()-1);
  39     }
  40     // strip the last whitespace (if there was one)
  41     if (lastCharacterWasWhitespace) {
  42         buffer.truncate(buffer.getLength() - 1);
  43     }
  44     mNewPositions.push_back(buffer.getLength());
  45     mStripped = buffer.makeStringAndClear();
  46 }
  47
  48
  49 sal_Int32
  50 ToxWhitespaceStripper::GetPositionInStrippedString(sal_Int32 pos) const
  51 {
  52     assert(0 <= pos);
  53     if (o3tl::make_unsigned(pos) >= mNewPositions.size()) {
  54         // TODO probably this should assert, not just warn?
  55         SAL_WARN("sw.core", "Requested position of TOX entry text which does not exist. "
  56                             "Maybe the formatting hint is corrupt?");
  57         return mNewPositions.back();
  58     }
  59     return mNewPositions.at(pos);
  60 }
  61
  62
  63 }