1// Copyright 2016 PDFium 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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7#include "xfa/fde/cfx_chariter.h"
8
9CFX_CharIter::CFX_CharIter(const CFX_WideString& wsText)
10    : m_wsText(wsText), m_nIndex(0) {
11  ASSERT(!wsText.IsEmpty());
12}
13
14CFX_CharIter::~CFX_CharIter() {}
15
16bool CFX_CharIter::Next(bool bPrev) {
17  if (bPrev) {
18    if (m_nIndex <= 0)
19      return false;
20    m_nIndex--;
21  } else {
22    if (m_nIndex + 1 >= m_wsText.GetLength())
23      return false;
24    m_nIndex++;
25  }
26  return true;
27}
28
29FX_WCHAR CFX_CharIter::GetChar() {
30  return m_wsText.GetAt(m_nIndex);
31}
32
33void CFX_CharIter::SetAt(int32_t nIndex) {
34  if (nIndex < 0 || nIndex >= m_wsText.GetLength())
35    return;
36  m_nIndex = nIndex;
37}
38
39int32_t CFX_CharIter::GetAt() const {
40  return m_nIndex;
41}
42
43bool CFX_CharIter::IsEOF(bool bTail) const {
44  return bTail ? (m_nIndex + 1 == m_wsText.GetLength()) : (m_nIndex == 0);
45}
46
47IFX_CharIter* CFX_CharIter::Clone() {
48  CFX_CharIter* pIter = new CFX_CharIter(m_wsText);
49  pIter->m_nIndex = m_nIndex;
50  return pIter;
51}
52