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      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 "../../include/fxcrt/fx_ext.h"
      8 extern const FX_DWORD gs_FX_TextLayout_CodeProperties[65536];
      9 extern const FX_WCHAR gs_FX_TextLayout_VerticalMirror[64];
     10 extern const FX_WCHAR gs_FX_TextLayout_BidiMirror[512];
     11 FX_DWORD FX_GetUnicodeProperties(FX_WCHAR wch)
     12 {
     13     return gs_FX_TextLayout_CodeProperties[(FX_WORD)wch];
     14 }
     15 FX_BOOL FX_IsCtrlCode(FX_WCHAR ch)
     16 {
     17     FX_DWORD dwRet = (gs_FX_TextLayout_CodeProperties[(FX_WORD)ch] & FX_CHARTYPEBITSMASK);
     18     return dwRet == FX_CHARTYPE_Tab || dwRet == FX_CHARTYPE_Control;
     19 }
     20 FX_BOOL FX_IsRotationCode(FX_WCHAR ch)
     21 {
     22     return (gs_FX_TextLayout_CodeProperties[(FX_WORD)ch] & 0x8000) != 0;
     23 }
     24 FX_BOOL FX_IsCombinationChar(FX_WCHAR wch)
     25 {
     26     FX_DWORD dwProps = (gs_FX_TextLayout_CodeProperties[(FX_WORD)wch] & FX_CHARTYPEBITSMASK);
     27     return dwProps == FX_CHARTYPE_Combination;
     28 }
     29 FX_BOOL	FX_IsBidiChar(FX_WCHAR wch)
     30 {
     31     FX_DWORD dwProps = gs_FX_TextLayout_CodeProperties[(FX_WORD)wch];
     32     FX_INT32 iBidiCls = (dwProps & FX_BIDICLASSBITSMASK) >> FX_BIDICLASSBITS;
     33     return (FX_BIDICLASS_R == iBidiCls || FX_BIDICLASS_AL == iBidiCls);
     34 }
     35 FX_WCHAR FX_GetMirrorChar(FX_WCHAR wch, FX_BOOL bRTL, FX_BOOL bVertical)
     36 {
     37     FX_DWORD dwProps = gs_FX_TextLayout_CodeProperties[(FX_WORD)wch];
     38     FX_DWORD dwTemp = (dwProps & 0xFF800000);
     39     if (bRTL && dwTemp < 0xFF800000) {
     40         wch = gs_FX_TextLayout_BidiMirror[dwTemp >> 23];
     41         dwProps = gs_FX_TextLayout_CodeProperties[(FX_WORD)wch];
     42     }
     43     if (bVertical) {
     44         dwTemp = (dwProps & 0x007E0000);
     45         if (dwTemp < 0x007E0000) {
     46             wch = gs_FX_TextLayout_VerticalMirror[dwTemp >> 17];
     47         }
     48     }
     49     return wch;
     50 }
     51 FX_WCHAR FX_GetMirrorChar(FX_WCHAR wch, FX_DWORD dwProps, FX_BOOL bRTL, FX_BOOL bVertical)
     52 {
     53     FX_DWORD dwTemp = (dwProps & 0xFF800000);
     54     if (bRTL && dwTemp < 0xFF800000) {
     55         wch = gs_FX_TextLayout_BidiMirror[dwTemp >> 23];
     56         dwProps = gs_FX_TextLayout_CodeProperties[(FX_WORD)wch];
     57     }
     58     if (bVertical) {
     59         dwTemp = (dwProps & 0x007E0000);
     60         if (dwTemp < 0x007E0000) {
     61             wch = gs_FX_TextLayout_VerticalMirror[dwTemp >> 17];
     62         }
     63     }
     64     return wch;
     65 }
     66