159 lines
3.4 KiB
C
159 lines
3.4 KiB
C
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/*++
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Copyright (c) 1993 Microsoft Corporation
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Module Name:
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fefont.c
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Abstract:
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Text setup display support for FarEast text output.
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Author:
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Hideyuki Nagase (hideyukn) 01-July-1994
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Revision History:
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--*/
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#include <precomp.h>
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#pragma hdrstop
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PWCHAR PaddedString(int size, PWCHAR pwch, PWCHAR buffer);
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ULONG
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FEGetStringColCount(
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IN PCWSTR String
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)
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{
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UNICODE_STRING UnicodeString;
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//
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// Each DBCS char takes 2 columns, and each SBCS char takes 1.
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// Thus each char takes as much space as the number of bytes
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// in its representation in codepage 932.
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//
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RtlInitUnicodeString(&UnicodeString,String);
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return(RtlxUnicodeStringToOemSize(&UnicodeString)-1);
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}
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PWSTR
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FEPadString(
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IN int Size,
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IN PCWSTR String
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)
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{
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return(PaddedString(Size,(PWCHAR)String,NULL));
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}
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/***************************************************************************\
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* BOOL IsFullWidth(WCHAR wch)
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*
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* Determine if the given Unicode char is fullwidth or not.
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*
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* History:
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* 04-08-92 ShunK Created.
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\***************************************************************************/
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BOOL IsFullWidth(WCHAR wch)
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{
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if (wch <= 0x007f || (wch >= 0xff60 && wch <= 0xff9f))
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return(FALSE); // Half width.
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else
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return(TRUE); // Full width.
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}
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/***************************************************************************\
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* BOOL SizeOfHalfWidthString(PWCHAR pwch)
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*
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* Determine size of the given Unicode string, adjusting for half-width chars.
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*
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* History:
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* 08-08-93 FloydR Created.
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\***************************************************************************/
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int SizeOfHalfWidthString(PWCHAR pwch)
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{
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int c=0;
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while (*pwch) {
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if (IsFullWidth(*pwch))
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c += 2;
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else
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c++;
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pwch++;
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}
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return c;
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}
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/***************************************************************************\
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* PWCHAR PaddedString(int size, PWCHAR pwch)
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*
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* Realize the string, left aligned and padded on the right to the field
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* width/precision specified.
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*
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* Limitations: This uses a static buffer under the assumption that
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* no more than one such string is printed in a single 'printf'.
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*
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* History:
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* 11-03-93 FloydR Created.
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\***************************************************************************/
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WCHAR PaddingBuffer[160];
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PWCHAR
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PaddedString(int size, PWCHAR pwch, PWCHAR buffer)
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{
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int realsize;
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int fEllipsis = FALSE;
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if (buffer==NULL) buffer = PaddingBuffer;
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if (size < 0) {
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fEllipsis = TRUE;
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size = -size;
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}
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realsize = _snwprintf(buffer, 160, L"%-*.*ws", size, size, pwch);
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if (realsize == 0)
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return NULL;
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if (SizeOfHalfWidthString(buffer) > size) {
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do {
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buffer[--realsize] = L'\0';
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} while (SizeOfHalfWidthString(buffer) > size);
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if (fEllipsis && buffer[realsize-1] != L' ') {
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WCHAR Trail1 = buffer[realsize-2],
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Trail2 = buffer[realsize-1];
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int Length;
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PWCHAR pwCurrent = &(buffer[realsize-2]);
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if(!IsFullWidth(Trail2)) {
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*pwCurrent++ = L'.';
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} else {
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pwCurrent++;
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}
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if(!IsFullWidth(Trail1)) {
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*pwCurrent++ = L'.';
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} else {
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*pwCurrent++ = L'.';
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*pwCurrent++ = L'.';
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}
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*pwCurrent = L'\0';
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Length = SizeOfHalfWidthString(buffer);
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while( Length++ < size ) {
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*pwCurrent++ = L'.';
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*pwCurrent = L'\0';
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}
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}
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}
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return buffer;
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}
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