1// Copyright 2014 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 "core/fxcrt/fx_ucd.h"
8
9uint32_t FX_GetUnicodeProperties(FX_WCHAR wch) {
10  size_t idx = static_cast<size_t>(wch);
11  if (idx < kTextLayoutCodePropertiesSize)
12    return kTextLayoutCodeProperties[(uint16_t)wch];
13  return 0;
14}
15
16#ifdef PDF_ENABLE_XFA
17bool FX_IsCtrlCode(FX_WCHAR ch) {
18  uint32_t dwRet = (FX_GetUnicodeProperties(ch) & FX_CHARTYPEBITSMASK);
19  return dwRet == FX_CHARTYPE_Tab || dwRet == FX_CHARTYPE_Control;
20}
21#endif  // PDF_ENABLE_XFA
22
23FX_WCHAR FX_GetMirrorChar(FX_WCHAR wch, bool bRTL, bool bVertical) {
24  uint32_t dwProps = FX_GetUnicodeProperties(wch);
25  uint32_t dwTemp = (dwProps & 0xFF800000);
26  if (bRTL && dwTemp < 0xFF800000) {
27    size_t idx = dwTemp >> 23;
28    if (idx < kFXTextLayoutBidiMirrorSize) {
29      wch = kFXTextLayoutBidiMirror[idx];
30      dwProps = FX_GetUnicodeProperties(wch);
31    }
32  }
33  if (bVertical) {
34    dwTemp = (dwProps & 0x007E0000);
35    if (dwTemp < 0x007E0000) {
36      size_t idx = dwTemp >> 17;
37      if (idx < kFXTextLayoutVerticalMirrorSize)
38        wch = kFXTextLayoutVerticalMirror[idx];
39    }
40  }
41  return wch;
42}
43
44#ifdef PDF_ENABLE_XFA
45FX_WCHAR FX_GetMirrorChar(FX_WCHAR wch,
46                          uint32_t dwProps,
47                          bool bRTL,
48                          bool bVertical) {
49  uint32_t dwTemp = (dwProps & 0xFF800000);
50  if (bRTL && dwTemp < 0xFF800000) {
51    size_t idx = dwTemp >> 23;
52    if (idx < kFXTextLayoutBidiMirrorSize) {
53      wch = kFXTextLayoutBidiMirror[idx];
54      dwProps = FX_GetUnicodeProperties(wch);
55    }
56  }
57  if (bVertical) {
58    dwTemp = (dwProps & 0x007E0000);
59    if (dwTemp < 0x007E0000) {
60      size_t idx = dwTemp >> 17;
61      if (idx < kFXTextLayoutVerticalMirrorSize)
62        wch = kFXTextLayoutVerticalMirror[idx];
63    }
64  }
65  return wch;
66}
67#endif  // PDF_ENABLE_XFA
68