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/****************************** Module Header ******************************\
* Module Name: drawtext.c** Copyright (c) 1985 - 1999, Microsoft Corporation** This module contains common text drawing functions.** History:* 02-12-92 mikeke Moved Drawtext to the client side\***************************************************************************/
/***************************************************************************\
* Define some macros to test the format flags. We won't support them all* on the kernel-mode side, since they're not all needed there.\***************************************************************************/#ifdef _USERK_
#define CALCRECT(wFormat) FALSE
#define EDITCONTROL(wFormat) FALSE
#define EXPANDTABS(wFormat) FALSE
#define EXTERNALLEADING(wFormat) FALSE
#define MODIFYSTRING(wFormat) FALSE
#define NOPREFIX(wFormat) TRUE
#define PATHELLIPSIS(wFormat) FALSE
#define SINGLELINE(wFormat) TRUE
#define TABSTOP(wFormat) FALSE
#define WORDBREAK(wFormat) FALSE
#define WORDELLIPSIS(wFormat) FALSE
#define NOFULLWIDTHCHARBREAK(dwFormat) FALSE
#else
#define CALCRECT(wFormat) (wFormat & DT_CALCRECT)
#define EDITCONTROL(wFormat) (wFormat & DT_EDITCONTROL)
#define EXPANDTABS(wFormat) (wFormat & DT_EXPANDTABS)
#define EXTERNALLEADING(wFormat) (wFormat & DT_EXTERNALLEADING)
#define MODIFYSTRING(wFormat) (wFormat & DT_MODIFYSTRING)
#define NOPREFIX(wFormat) (wFormat & DT_NOPREFIX)
#define PATHELLIPSIS(wFormat) (wFormat & DT_PATH_ELLIPSIS)
#define SINGLELINE(wFormat) (wFormat & DT_SINGLELINE)
#define TABSTOP(wFormat) (wFormat & DT_TABSTOP)
#define WORDBREAK(wFormat) (wFormat & DT_WORDBREAK)
#define WORDELLIPSIS(wFormat) (wFormat & DT_WORD_ELLIPSIS)
// Note: DT_NOFULLWIDTHCHARBREAK exceeds WORD limit. Use dwFormat
// rather than wFormat.
#define NOFULLWIDTHCHARBREAK(dwFormat) (dwFormat & DT_NOFULLWIDTHCHARBREAK)
#endif
#define ENDELLIPSIS(wFormat) (wFormat & DT_END_ELLIPSIS)
#define NOCLIP(wFormat) (wFormat & DT_NOCLIP)
#define RTLREADING(wFormat) (wFormat & DT_RTLREADING)
#define HIDEPREFIX(wFormat) (wFormat & DT_HIDEPREFIX)
/***************************************************************************\
* Stuff used in DrawText code\***************************************************************************/
#define CR 13
#define LF 10
#define SYM_SP 0xf020
#define DT_HFMTMASK 0x03
#define DT_VFMTMASK 0x0C
#define ETO_OPAQUEFGND 0x0A
static CONST WCHAR szEllipsis[CCHELLIPSIS+1] = TEXT("...");
extern HDC ghdcBits2;
/* Max length of a full path is around 260. But, most of the time, it will
* be less than 128. So, we alloc only this much on stack. If the string is * longer, we alloc from local heap (which is slower). * * BOGUS: For international versions, we need to give some more margin here. */#define MAXBUFFSIZE 128
/***************************************************************************\
* There are word breaking characters which are compatible with* Japanese Windows 3.1 and FarEast Windows 95.** SJ - Country Japan , Charset SHIFTJIS, Codepage 932.* GB - Country PRC , Charset GB2312 , Codepage 936.* B5 - Country Taiwan, Charset BIG5 , Codepage 950.* WS - Country Korea , Charset WANGSUNG, Codepage 949.* JB - Country Korea , Charset JOHAB , Codepage 1361. *** LATER ***** [START BREAK CHARACTERS]** These character should not be the last charatcer of the line.** Unicode Japan PRC Taiwan Korea* -------+---------+---------+---------+---------+** + ASCII** U+0024 (SJ+0024) (WS+0024) Dollar sign* U+0028 (SJ+0028) (WS+0028) Opening parenthesis* U+003C (SJ+003C) Less-than sign* U+005C (SJ+005C) Backslash* U+005B (SJ+005B) (GB+005B) (WS+005B) Opening square bracket* U+007B (SJ+007B) (GB+007B) (WS+007B) Opening curly bracket** + General punctuation** U+2018 (WS+A1AE) Single Turned Comma Quotation Mark* U+201C (WS+A1B0) Double Comma Quotation Mark** + CJK symbols and punctuation** U+3008 (WS+A1B4) Opening Angle Bracket* U+300A (SJ+8173) (WS+A1B6) Opening Double Angle Bracket* U+300C (SJ+8175) (WS+A1B8) Opening Corner Bracket* U+300E (SJ+8177) (WS+A1BA) Opening White Corner Bracket* U+3010 (SJ+9179) (WS+A1BC) Opening Black Lenticular Bracket* U+3014 (SJ+816B) (WS+A1B2) Opening Tortoise Shell Bracket** + Fullwidth ASCII variants** U+FF04 (WS+A3A4) Fullwidth Dollar Sign* U+FF08 (SJ+8169) (WS+A3A8) Fullwidth opening parenthesis* U+FF1C (SJ+8183) Fullwidth less-than sign* U+FF3B (SJ+816D) (WS+A3DB) Fullwidth opening square bracket* U+FF5B (SJ+816F) (WS+A3FB) Fullwidth opening curly bracket** + Halfwidth Katakana variants** U+FF62 (SJ+00A2) Halfwidth Opening Corner Bracket** + Fullwidth symbol variants** U+FFE1 (WS+A1CC) Fullwidth Pound Sign* U+FFE6 (WS+A3DC) Fullwidth Won Sign** [END BREAK CHARACTERS]** These character should not be the top charatcer of the line.** Unicode Japan PRC Taiwan Korea* -------+---------+---------+---------+---------+** + ASCII** U+0021 (SJ+0021) (GB+0021) (B5+0021) (WS+0021) Exclamation mark* U+0025 (WS+0025) Percent Sign* U+0029 (SJ+0029) (WS+0029) Closing parenthesis* U+002C (SJ+002C) (GB+002C) (B5+002C) (WS+002C) Comma* U+002E (SJ+002E) (GB+002E) (B5+002E) (WS+002E) Priod* U+003A (WS+003A) Colon* U+003B (WS+003B) Semicolon* U+003E (SJ+003E) Greater-than sign* U+003F (SJ+003F) (GB+003F) (B5+003F) (WS+003F) Question mark* U+005D (SJ+005D) (GB+005D) (B5+005D) (WS+005D) Closing square bracket* U+007D (SJ+007D) (GB+007D) (B5+007D) (WS+007D) Closing curly bracket** + Latin1** U+00A8 (GB+A1A7) Spacing diaeresis* U+00B0 (WS+A1C6) Degree Sign* U+00B7 (B5+A150) Middle Dot** + Modifier letters** U+02C7 (GB+A1A6) Modifier latter hacek* U+02C9 (GB+A1A5) Modifier letter macron** + General punctuation** U+2013 (B5+A156) En Dash* U+2014 (b5+A158) Em Dash* U+2015 (GB+A1AA) Quotation dash* U+2016 (GB+A1AC) Double vertical bar* U+2018 (GB+A1AE) Single turned comma quotation mark* U+2019 (GB+A1AF) (B5+A1A6) (WS+A1AF) Single comma quotation mark* U+201D (GB+A1B1) (B5+A1A8) (WS+A1B1) Double comma quotation mark* U+2022 (GB+A1A4) Bullet* U+2025 (B5+A14C) Two Dot Leader* U+2026 (GB+A1AD) (B5+A14B) Horizontal ellipsis* U+2027 (B5+A145) Hyphenation Point* U+2032 (B5+A1AC) (WS+A1C7) Prime* U+2033 (WS+A1C8) Double Prime** + Letterlike symbols** U+2103 (WS+A1C9) Degrees Centigrade** + Mathemetical opetartors** U+2236 (GB+A1C3) Ratio** + Form and Chart components** U+2574 (B5+A15A) Forms Light Left** + CJK symbols and punctuation** U+3001 (SJ+8141) (GB+A1A2) (B5+A142) Ideographic comma* U+3002 (SJ+8142) (GB+A1A3) (B5+A143) Ideographic period* U+3003 (GB+A1A8) Ditto mark* U+3005 (GB+A1A9) Ideographic iteration* U+3009 (GB+A1B5) (B5+A172) (WS+A1B5) Closing angle bracket* U+300B (SJ+8174) (GB+A1B7) (B5+A16E) (WS+A1B7) Closing double angle bracket* U+300D (SJ+8176) (GB+A1B9) (B5+A176) (WS+A1B9) Closing corner bracket* U+300F (SJ+8178) (GB+A1BB) (B5+A17A) (WS+A1BB) Closing white corner bracket* U+3011 (SJ+817A) (GB+A1BF) (B5+A16A) (WS+A1BD) Closing black lenticular bracket* U+3015 (SJ+816C) (GB+A1B3) (B5+A166) (WS+A1B3) Closing tortoise shell bracket* U+3017 (GB+A1BD) Closing white lenticular bracket* U+301E (B5+A1AA) Double Prime Quotation Mark** + Hiragana** U+309B (SJ+814A) Katakana-Hiragana voiced sound mark* U+309C (SJ+814B) Katakana-Hiragana semi-voiced sound mark** + CNS 11643 compatibility** U+FE30 (B5+A14A) Glyph for Vertical 2 Dot Leader* U+FE31 (B5+A157) Glyph For Vertical Em Dash* U+FE33 (B5+A159) Glyph for Vertical Spacing Underscore* U+FE34 (B5+A15B) Glyph for Vertical Spacing Wavy Underscore* U+FE36 (B5+A160) Glyph For Vertical Closing Parenthesis* U+FE38 (B5+A164) Glyph For Vertical Closing Curly Bracket* U+FE3A (B5+A168) Glyph For Vertical Closing Tortoise Shell Bracket* U+FE3C (B5+A16C) Glyph For Vertical Closing Black Lenticular Bracket* U+FE3E (B5+A16E) Closing Double Angle Bracket* U+FE40 (B5+A174) Glyph For Vertical Closing Angle Bracket* U+FE42 (B5+A178) Glyph For Vertical Closing Corner Bracket* U+FE44 (B5+A17C) Glyph For Vertical Closing White Corner Bracket* U+FE4F (B5+A15C) Spacing Wavy Underscore** + Small variants** U+FE50 (B5+A14D) Small Comma* U+FE51 (B5+A14E) Small Ideographic Comma* U+FE52 (B5+A14F) Small Period* U+FE54 (B5+A151) Small Semicolon* U+FE55 (B5+A152) Small Colon* U+FE56 (B5+A153) Small Question Mark* U+FE57 (B5+A154) Small Exclamation Mark* U+FE5A (B5+A17E) Small Closing Parenthesis* U+FE5C (B5+A1A2) Small Closing Curly Bracket* U+FE5E (B5+A1A4) Small Closing Tortoise Shell Bracket** + Fullwidth ASCII variants** U+FF01 (SJ+8149) (GB+A3A1) (B5+A149) (WS+A3A1) Fullwidth exclamation mark* U+FF02 (GB+A3A2) Fullwidth Quotation mark* U+FF05 (WS+A3A5) Fullwidth Percent Sign* U+FF07 (GB+A3A7) Fullwidth Apostrophe* U+FF09 (SJ+816A) (GB+A3A9) (B5+A15E) (WS+A3A9) Fullwidth Closing parenthesis* U+FF0C (SJ+8143) (GB+A3AC) (B5+A141) (WS+A3AC) Fullwidth comma* U+FF0D (GB+A3AD) Fullwidth Hyphen-minus* U+FF0E (SJ+8144) (B5+A144) (WS+A3AE) Fullwidth period* U+FF1A (GB+A3BA) (B4+A147) (WS+A3BA) Fullwidth colon* U+FF1B (GB+A3BB) (B5+A146) (WS+A3BB) Fullwidth semicolon* U+FF1E (SJ+8184) Fullwidth Greater-than sign* U+FF1F (SJ+8148) (GB+A3BF) (B5+A148) (WS+A3BF) Fullwidth question mark* U+FF3D (SJ+816E) (GB+A3DD) (WS+A3DD) Fullwidth Closing square bracket* U+FF5C (B5+A155) Fullwidth Vertical Bar* U+FF5D (SJ+8170) (B5+A162) (WS+A3FD) Fullwidth Closing curly bracket* U+FF5E (GB+A1AB) Fullwidth Spacing tilde** + Halfwidth Katakana variants** U+FF61 (SJ+00A1) Halfwidth Ideographic period* U+FF63 (SJ+00A3) Halfwidth Closing corner bracket* U+FF64 (SJ+00A4) Halfwidth Ideographic comma* U+FF9E (SJ+00DE) Halfwidth Katakana voiced sound mark* U+FF9F (SJ+00DF) Halfwidth Katakana semi-voiced sound mark** + Fullwidth symbol variants** U+FFE0 (WS+A1CB) Fullwidth Cent Sign*\***************************************************************************/
#if 0 // not currently used --- FYI only
/***************************************************************************\
* Start Break table* These character should not be the last charatcer of the line.\***************************************************************************/
CONST BYTE aASCII_StartBreak[] = {/* 00 0 1 2 3 4 5 6 7 8 9 A B C D E F *//* 2X */ 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,/* 3X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,/* 4X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,/* 5X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0,/* 6X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,/* 7X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1};
CONST BYTE aCJKSymbol_StartBreak[] = {/* 30 0 1 2 3 4 5 6 7 8 9 A B C D E F *//* 0X */ 1, 0, 1, 0, 1, 0, 1, 0,/* 1X */ 1, 0, 0, 0, 1};
CONST BYTE aFullWidthHalfWidthVariants_StartBreak[] = {/* FF 0 1 2 3 4 5 6 7 8 9 A B C D E F *//* 0X */ 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,/* 1X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,/* 2X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,/* 3X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0,/* 4X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,/* 5X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0,/* 6X */ 0, 0, 1};#endif
/***************************************************************************\
* End Break table.* These character should not be the top charatcer of the line.\***************************************************************************/
CONST BYTE aASCII_Latin1_EndBreak[] = {/* 00 0 1 2 3 4 5 6 7 8 9 A B C D E F *//* 2X */ 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 0,/* 3X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1,/* 4X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,/* 5X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0,/* 6X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,/* 7X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0,/* 8X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,/* 9X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,/* AX */ 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,/* BX */ 1, 0, 0, 0, 0, 0, 0, 1};
CONST BYTE aGeneralPunctuation_EndBreak[] = {/* 20 0 1 2 3 4 5 6 7 8 9 A B C D E F *//* 1X */ 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0,/* 2X */ 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,/* 3X */ 0, 0, 1, 1};
CONST BYTE aCJKSymbol_EndBreak[] = {/* 30 0 1 2 3 4 5 6 7 8 9 A B C D E F *//* 0X */ 1, 1, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1,/* 1X */ 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1};
CONST BYTE aCNS11643_SmallVariants_EndBreak[] = {/* FE 0 1 2 3 4 5 6 7 8 9 A B C D E F *//* 3X */ 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0,/* 4X */ 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,/* 5X */ 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0, 1};
CONST BYTE aFullWidthHalfWidthVariants_EndBreak[] = {/* FF 0 1 2 3 4 5 6 7 8 9 A B C D E F *//* 0X */ 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 0,/* 1X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1,/* 2X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,/* 3X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0,/* 4X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,/* 5X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0,/* 6X */ 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,/* 7X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,/* 8X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,/* 9X */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1};
/***************************************************************************\
* UserIsFELineBreak() - Detects East Asia word breaking characters. ** ** History: ** 10-Mar-1996 HideyukN Created. *\***************************************************************************/
#if 0 // not currently used --- FYI only
BOOL UserIsFELineBreakStart(WCHAR wch){ switch (wch>>8) { case 0x00: //
// Check if word breaking chars in ASCII.
//
if ((wch >= 0x0024) && (wch <= 0x007B)) return((BOOL)(aASCII_StartBreak[wch - 0x0024])); else return(FALSE);
case 0x20: //
// Check if work breaking chars in "General punctuation"
//
if ((wch == 0x2018) || (wch == 0x201C)) return(TRUE); else return(FALSE);
case 0x30: //
// Check if word breaking chars in "CJK symbols and punctuation"
// and Hiragana.
//
if ((wch >= 0x3008) && (wch <= 0x3014)) return((BOOL)(aCJKSymbol_StartBreak[wch - 0x3008])); else return(FALSE);
case 0xFF: //
// Check if word breaking chars in "Fullwidth ASCII variants",
// "Halfwidth Katakana variants" or "Fullwidth Symbol variants".
//
if ((wch >= 0xFF04) && (wch <= 0xFF62)) return((BOOL)(aFullWidthHalfWidthVariants_StartBreak[wch - 0xFF04])); else if ((wch == 0xFFE1) || (wch == 0xFFE6)) return(TRUE); else return(FALSE);
default: return(FALSE); }}#endif
BOOL UserIsFELineBreakEnd(WCHAR wch){ switch (wch>>8) { case 0x00: //
// Check if word breaking chars in ASCII or Latin1.
//
if ((wch >= 0x0021) && (wch <= 0x00B7)) return((BOOL)(aASCII_Latin1_EndBreak[wch - 0x0021])); else return(FALSE);
case 0x02: //
// Check if work breaking chars in "Modifier letters"
//
if ((wch == 0x02C7) || (wch == 0x02C9)) return(TRUE); else return(FALSE);
case 0x20: //
// Check if work breaking chars in "General punctuation"
//
if ((wch >= 0x2013) && (wch <= 0x2033)) return((BOOL)(aGeneralPunctuation_EndBreak[wch - 0x2013])); else return(FALSE);
case 0x21: //
// Check if work breaking chars in "Letterlike symbols"
//
if (wch == 0x2103) return(TRUE); else return(FALSE);
case 0x22: //
// Check if work breaking chars in "Mathemetical opetartors"
//
if (wch == 0x2236) return(TRUE); else return(FALSE);
case 0x25: //
// Check if work breaking chars in "Form and Chart components"
//
if (wch == 0x2574) return(TRUE); else return(FALSE);
case 0x30: //
// Check if word breaking chars in "CJK symbols and punctuation"
// and Hiragana.
//
if ((wch >= 0x3001) && (wch <= 0x301E)) return((BOOL)(aCJKSymbol_EndBreak[wch - 0x3001])); else if ((wch == 0x309B) || (wch == 0x309C)) return(TRUE); else return(FALSE);
case 0xFE: //
// Check if word breaking chars in "CNS 11643 compatibility"
// or "Small variants".
//
if ((wch >= 0xFE30) && (wch <= 0xFE5E)) return((BOOL)(aCNS11643_SmallVariants_EndBreak[wch - 0xFE30])); else return(FALSE);
case 0xFF: //
// Check if word breaking chars in "Fullwidth ASCII variants",
// "Halfwidth Katakana variants" or "Fullwidth symbol variants".
//
if ((wch >= 0xFF01) && (wch <= 0xFF9F)) return((BOOL)(aFullWidthHalfWidthVariants_EndBreak[wch - 0xFF01])); else if (wch >= 0xFFE0) return(TRUE); else return(FALSE);
default: return(FALSE); }}
#define UserIsFELineBreak(wChar) UserIsFELineBreakEnd(wChar)
/***************************************************************************\
* UserIsFullWidth() - Detects East Asia FullWidth character. ** ** History: ** 10-Mar-1996 HideyukN Created *\***************************************************************************/
typedef struct _FULLWIDTH_UNICODE { WCHAR Start; WCHAR End;} FULLWIDTH_UNICODE, *PFULLWIDTH_UNICODE;
#define NUM_FULLWIDTH_UNICODES 4
CONST FULLWIDTH_UNICODE FullWidthUnicodes[] = { { 0x4E00, 0x9FFF }, // CJK_UNIFIED_IDOGRAPHS
{ 0x3040, 0x309F }, // HIRAGANA
{ 0x30A0, 0x30FF }, // KATAKANA
{ 0xAC00, 0xD7A3 } // HANGUL
};
BOOL UserIsFullWidth(DWORD dwCodePage,WCHAR wChar){ INT index; INT cChars;#ifdef _USERK_
CHAR aChars[2];#endif // _USERK_
//
// Early out for ASCII.
//
if (wChar < 0x0080) { //
// if the character < 0x0080, it should be a halfwidth character.
//
return (FALSE); } //
// Scan FullWdith definition table... most of FullWidth character is
// defined here... this is more faster than call NLS API.
//
for (index = 0; index < NUM_FULLWIDTH_UNICODES; index++) { if ((wChar >= FullWidthUnicodes[index].Start) && (wChar <= FullWidthUnicodes[index].End) ) { return (TRUE); } } //
// if this Unicode character is mapped to Double-Byte character,
// this is also FullWidth character..
//
#ifdef _USERK_
cChars = EngWideCharToMultiByte((UINT)dwCodePage,&wChar,sizeof(WCHAR),aChars,sizeof(aChars));#else
cChars = WideCharToMultiByte((UINT)dwCodePage,0,&wChar,1,NULL,0,NULL,NULL);#endif // _USERK_
return(cChars > 1 ? TRUE : FALSE);}/***************************************************************************\
* UserTextOutWInternal* Wrapper for UserTextOutW, used to adjust the parameter passed to* PSMTextOut*\***************************************************************************/BOOL UserTextOutWInternal( HDC hdc, int x, int y, LPCWSTR lp, UINT cc, DWORD dwFlags){ UNREFERENCED_PARAMETER(dwFlags); return UserTextOutW(hdc, x, y, lp, cc);}
/*--------------------------------------------------------------------------*//* *//* KKGetPrefixWidth() - *//* *//* Returns total width of prefix character. Japanese Windows has *//* three shortcut prefixes, '&',\036 and \037. They may have *//* different width. *//* *//* From Chicago ctlmgr.c HideyukN *//*--------------------------------------------------------------------------*/
int KKGetPrefixWidth(HDC hdc, LPCWSTR lpStr, int cch){ SIZE size; SIZE iPrefix1 = {-1L,-1L}; SIZE iPrefix2 = {-1L,-1L}; SIZE iPrefix3 = {-1L,-1L}; int iTotal = 0;
while (cch-- > 0 && *lpStr) { switch(*lpStr) { case CH_PREFIX: if (lpStr[1] != CH_PREFIX) { if (iPrefix1.cx == -1) { UserGetTextExtentPointW(hdc, lpStr, 1, &iPrefix1); } iTotal += iPrefix1.cx; } else { lpStr++; cch--; } break; case CH_ENGLISHPREFIX: if (iPrefix2.cx == -1) { UserGetTextExtentPointW(hdc, lpStr, 1, &iPrefix2); } iTotal += iPrefix2.cx; break; case CH_KANJIPREFIX: if (iPrefix3.cx == -1) { UserGetTextExtentPointW(hdc, lpStr, 1, &iPrefix3); } iTotal += iPrefix3.cx; //
// In NT, always alpha numeric mode, Then we have to sum
// KANA accel key prefix non visible char width.
// so always add the extent for next char.
//
UserGetTextExtentPointW(hdc, lpStr, 1, &size); iTotal += size.cx; break; default: // No need to taking care of Double byte since 2nd byte of
// DBC is grater than 0x2f but all shortcut keys are less
// than 0x30.
break; } lpStr++; } return iTotal;}
#if ((DT_WORDBREAK & ~0xff) != 0)
#error cannot use BOOLEAN for DT_WORDBREAK, or you should use "!!" before assigning it
#endif
/*--------------------------------------------------------------------------*//* *//* GetNextWordbreak() - *//* From Chicago ctlmgr.c FritzS *//* *//*--------------------------------------------------------------------------*/
LPCWSTR GetNextWordbreak(DWORD dwCodePage, LPCWSTR lpch, LPCWSTR lpchEnd, DWORD dwFormat, LPDRAWTEXTDATA lpDrawInfo)
{ /* ichNonWhite is used to make sure we always make progress. */ int ichNonWhite = 1; int ichComplexBreak = 0; // Breaking opportunity for complex scripts
BOOLEAN fBreakSpace = (BOOLEAN)WORDBREAK(dwFormat); /*
* If DT_WORDBREAK and DT_NOFULLWIDTHCHARBREAK are both set, we must * stop assuming FullWidth characters as word as we're doing in * NT4 and Win95. Instead, CR/LF and/or white space will only be * a line-break characters. */ BOOLEAN fDbcsCharBreak = (fBreakSpace && !NOFULLWIDTHCHARBREAK(dwFormat));
#ifdef _USERK_
/*
* Well, we actually should not and do not call GetNextWordBreak() in * kernel, since only Menu stuff (no word break!) calls DrawText from kernel. * In reality, thanks to a smart linker, word-break helper * functions even does not exist in win32k.sys. * Later, we should explicitly omit to compile those routines when we * build kernel. */ UNREFERENCED_PARAMETER(dwFormat);#endif
// We must terminate this loop before lpch == lpchEnd, otherwise, we
// may gp fault during *lpch.
while (lpch < lpchEnd) { switch (*lpch) { case CR: case LF: return lpch;
case '\t': case ' ': case SYM_SP: if (fBreakSpace) return (lpch + ichNonWhite);
/*** FALL THRU ***/
default: /*
* Since most Japanese writing don't use space character * to separate each word, we define each Kanji character * as a word. */ if (fDbcsCharBreak && UserIsFullWidth(dwCodePage, *lpch)) { if (!ichNonWhite) return lpch; /*
* if the next character is the last character of this string, * We return the character, even this is a "KINSOKU" charcter... */ if ((lpch+1) != lpchEnd) { /*
* Check next character of FullWidth character. * if the next character is "KINSOKU" character, the character * should be handled as a part of previous FullWidth character. * Never handle is as A character, and should not be a Word also. */ if (UserIsFELineBreak(*(lpch+1))) { /*
* Then if the character is "KINSOKU" character, we return * the next of this character,... */ return (lpch + 1 + 1); } } /*
* Otherwise, we just return the chracter that is next of FullWidth * Character. Because we treat A FullWidth chacter as A Word. */ return (lpch + 1); } /*
* If the character is not a FullWidth character and the complex script * LPK is present. Call it to determine the breaking opportunity for * script that requires word break such as Thai. Note that if *lpch is * NOT a complex script character. The LPK will fail the call and return 0 * since currently Uniscribe does not know how to handle FE break. */ else if(fBreakSpace && lpDrawInfo->bCharsetDll) {#ifdef _USERK_
PTHREADINFO ptiCurrent = PtiCurrentShared(); if(CALL_LPK(ptiCurrent))#endif
ichComplexBreak = (*UserLpkDrawTextEx)(0, 0, 0, lpch, (int)(lpchEnd - lpch), 0, 0, NULL, DT_GETNEXTWORD, -1); if (ichComplexBreak > 0) return (lpch + ichComplexBreak); } lpch++; ichNonWhite = 0; } }
return lpch;}
/***************************************************************************\
* GetPrefixCount** This routine returns the count of accelerator mnemonics and the* character location (starting at 0) of the character to underline.* A single CH_PREFIX character will be striped and the following character* underlined, all double CH_PREFIX character sequences will be replaced by* a single CH_PREFIX (this is done by PSMTextOut). This routine is used* to determine the actual character length of the string that will be* printed, and the location the underline should be placed. Only* cch characters from the input string will be processed. If the lpstrCopy* parameter is non-NULL, this routine will make a printable copy of the* string with all single prefix characters removed and all double prefix* characters collapsed to a single character. If copying, a maximum* character count must be specified which will limit the number of* characters copied.** The location of the single CH_PREFIX is returned in the low order* word, and the count of CH_PREFIX characters that will be striped* from the string during printing is in the hi order word. If the* high order word is 0, the low order word is meaningless. If there* were no single prefix characters (i.e. nothing to underline), the* low order word will be -1 (to distinguish from location 0).** These routines assume that there is only one single CH_PREFIX character* in the string.** WARNING! this rountine returns information in BYTE count not CHAR count* (so it can easily be passed onto GreExtTextOutW which takes byte* counts as well)** History:* 11-13-90 JimA Ported to NT* 30-Nov-1992 mikeke Client side version\***************************************************************************/
LONG GetPrefixCount( LPCWSTR lpstr, int cch, LPWSTR lpstrCopy, int charcopycount){ int chprintpos = 0; /* Num of chars that will be printed */ int chcount = 0; /* Num of prefix chars that will be removed */ int chprefixloc = -1; /* Pos (in printed chars) of the prefix */ WCHAR ch;
/*
* If not copying, use a large bogus count... */ if (lpstrCopy == NULL) charcopycount = 32767;
while ((cch-- > 0) && *lpstr && charcopycount-- != 0) {
/*
* Is this guy a prefix character ? */ if ((ch = *lpstr++) == CH_PREFIX) {
/*
* Yup - increment the count of characters removed during print. */ chcount++;
/*
* Is the next also a prefix char? */ if (*lpstr != CH_PREFIX) {
/*
* Nope - this is a real one, mark its location. */ chprefixloc = chprintpos;
} else {
/*
* yup - simply copy it if copying. */ if (lpstrCopy != NULL) *(lpstrCopy++) = CH_PREFIX; cch--; lpstr++; chprintpos++; } } else if (ch == CH_ENGLISHPREFIX) { // Still needs to be parsed
/*
* Yup - increment the count of characters removed during print. */ chcount++;
/*
* Next character is a real one, mark its location. */ chprefixloc = chprintpos;
} else if (ch == CH_KANJIPREFIX) { // Still needs to be parsed
/*
* We only support Alpha Numeric(CH_ENGLISHPREFIX). * no support for Kana(CH_KANJIPREFIX). */ /*
* Yup - increment the count of characters removed during print. */ chcount++;
if(cch) { /* don't copy the character */ chcount++; lpstr++; cch--; } } else {
/*
* Nope - just inc count of char. that will be printed */ chprintpos++; if (lpstrCopy != NULL) *(lpstrCopy++) = ch; } }
if (lpstrCopy != NULL) *lpstrCopy = 0;
/*
* Return the character counts */ return MAKELONG(chprefixloc, chcount);}
/***************************************************************************\
* DT_GetExtentMinusPrefixes\***************************************************************************/
int DT_GetExtentMinusPrefixes(HDC hdc, LPCWSTR lpchStr, int cchCount, UINT wFormat, int iOverhang, LPDRAWTEXTDATA lpDrawInfo, int iCharSet){ int iPrefixCount; int cxPrefixes = 0; WCHAR PrefixChar = CH_PREFIX; SIZE size; PCLIENTINFO pci = GetClientInfo();#ifdef _USERK_
PTHREADINFO ptiCurrent = PtiCurrentShared();#endif
UNREFERENCED_PARAMETER(wFormat);
if(!NOPREFIX(wFormat) && (iPrefixCount = HIWORD(GetPrefixCount(lpchStr, cchCount, NULL, 0)))) { //
// Kanji Windows has three shortcut prefixes...
// (ported from Win95 ctlmgr.c)
//
BOOL b16Bit;
#ifdef _USERK_
try { b16Bit = pci->dwTIFlags & TIF_16BIT; } except (W32ExceptionHandler(FALSE, RIP_WARNING)) { b16Bit = FALSE; }#else
b16Bit = pci->dwTIFlags & TIF_16BIT;#endif
if (IS_DBCS_ENABLED() && b16Bit) { // 16bit apps compatibility
cxPrefixes = KKGetPrefixWidth(hdc, lpchStr, cchCount) - (iPrefixCount * iOverhang); } else { if(lpDrawInfo->bCharsetDll) {#ifdef _USERK_
if(CALL_LPK(ptiCurrent))#endif // _USERK_
{ // Call LPKDrawTextEx with fDraw = FALSE just to get the text extent.
return (*UserLpkDrawTextEx)(hdc, 0, 0, lpchStr, cchCount, FALSE, wFormat, lpDrawInfo, DT_CHARSETDRAW, iCharSet); } } else { cxPrefixes = UserGetTextExtentPointW(hdc, &PrefixChar, 1, &size); cxPrefixes = size.cx - iOverhang; cxPrefixes *= iPrefixCount; } } }#ifdef _USERK_
if(CALL_LPK(ptiCurrent)) xxxClientGetTextExtentPointW(hdc, lpchStr, cchCount, &size); else#endif // _USERK_
UserGetTextExtentPointW(hdc, lpchStr, cchCount, &size); return (size.cx - cxPrefixes);}
/***************************************************************************\
* DT_DrawStr* This will draw the given string in the given location without worrying* about the left/right justification. Gets the extent and returns it.* If fDraw is TRUE and if NOT DT_CALCRECT, this draws the text.* NOTE: This returns the extent minus Overhang.** From Chicago ctlmgr.c FritzS\***************************************************************************/int DT_DrawStr(HDC hdc, int xLeft, int yTop, LPCWSTR lpchStr, int cchCount, BOOL fDraw, UINT wFormat, LPDRAWTEXTDATA lpDrawInfo, int iCharSet){ LPCWSTR lpch; int iLen; int cxExtent; int xOldLeft = xLeft; // Save the xLeft given to compute the extent later
int xTabLength = lpDrawInfo->cxTabLength; int iTabOrigin = lpDrawInfo->rcFormat.left;
//
// Because xLeft and yTop is a point in a rect, and we shift the rect in a mirrored hdc to include
// its most right pixel, then shift this point as well.
//
if (UserGetLayout(hdc) & LAYOUT_RTL) { --xOldLeft; --xLeft; }
//
// if there is a charset dll, let it draw the text.
//
if(lpDrawInfo->bCharsetDll) {#ifdef _USERK_
PTHREADINFO ptiCurrent = PtiCurrentShared();
//
// Don't perform a callback if in thread cleanup mode.
//
if(!CALL_LPK(ptiCurrent)) return 0 ;#endif // _USERK_
return (*UserLpkDrawTextEx)(hdc, xLeft, yTop, lpchStr, cchCount, fDraw, wFormat, lpDrawInfo, DT_CHARSETDRAW, iCharSet); }
// Check if the tabs need to be expanded
if(EXPANDTABS(wFormat)) { while(cchCount) { // Look for a tab
for(iLen = 0, lpch = lpchStr; iLen < cchCount; iLen++) if(*lpch++ == TEXT('\t')) break;
// Draw text, if any, upto the tab
if (iLen) { // Draw the substring taking care of the prefixes.
if (fDraw && !CALCRECT(wFormat)) { // Only if we need to draw text
(*(lpDrawInfo->lpfnTextDraw))(hdc, xLeft, yTop, (LPWSTR)lpchStr, iLen, wFormat); } // Get the extent of this sub string and add it to xLeft.
xLeft += DT_GetExtentMinusPrefixes(hdc, lpchStr, iLen, wFormat, lpDrawInfo->cxOverhang, lpDrawInfo, iCharSet) - lpDrawInfo->cxOverhang; }
//if a TAB was found earlier, calculate the start of next sub-string.
if (iLen < cchCount) { iLen++; // Skip the tab
if (xTabLength) // Tab length could be zero
xLeft = (((xLeft - iTabOrigin)/xTabLength) + 1)*xTabLength + iTabOrigin; }
// Calculate the details of the string that remains to be drawn.
cchCount -= iLen; lpchStr = lpch; } cxExtent = xLeft - xOldLeft; } else { // If required, draw the text (with either PSMTextOut or PSTextOut)
if (fDraw && !CALCRECT(wFormat)) { (*(lpDrawInfo->lpfnTextDraw))(hdc, xLeft, yTop, (LPWSTR)lpchStr, cchCount, wFormat); } // Compute the extent of the text.
cxExtent = DT_GetExtentMinusPrefixes(hdc, lpchStr, cchCount, wFormat, lpDrawInfo->cxOverhang, lpDrawInfo, iCharSet) - lpDrawInfo->cxOverhang; } return cxExtent;}
/***************************************************************************\
* DT_DrawJustifiedLine* This function draws one complete line with proper justification** from Chicago ctlmgr.c FritzS\***************************************************************************/
void DT_DrawJustifiedLine(HDC hdc, int yTop, LPCWSTR lpchLineSt, int cchCount, UINT wFormat, LPDRAWTEXTDATA lpDrawInfo, int iCharSet){ LPRECT lprc; int cxExtent; int xLeft;
lprc = &(lpDrawInfo->rcFormat); xLeft = lprc->left;
// Handle the special justifications (right or centered) properly.
if(wFormat & (DT_CENTER | DT_RIGHT)) { cxExtent = DT_DrawStr(hdc, xLeft, yTop, lpchLineSt, cchCount, FALSE, wFormat, lpDrawInfo, iCharSet) + lpDrawInfo->cxOverhang; if(wFormat & DT_CENTER) xLeft = lprc->left + (((lprc->right - lprc->left) - cxExtent) >> 1); else xLeft = lprc->right - cxExtent; } else xLeft = lprc->left;
// Draw the whole line.
cxExtent = DT_DrawStr(hdc, xLeft, yTop, lpchLineSt, cchCount, TRUE, wFormat, lpDrawInfo, iCharSet) +lpDrawInfo->cxOverhang; if(cxExtent > lpDrawInfo->cxMaxExtent) lpDrawInfo->cxMaxExtent = cxExtent;}
/***************************************************************************\
* DT_InitDrawTextInfo* This is called at the begining of DrawText(); This initializes the* DRAWTEXTDATA structure passed to this function with all the required info.** from Chicago ctlmgr.c FritzS\***************************************************************************/
BOOL DT_InitDrawTextInfo( HDC hdc, LPRECT lprc, UINT wFormat, LPDRAWTEXTDATA lpDrawInfo, LPDRAWTEXTPARAMS lpDTparams){ SIZE sizeViewPortExt = {0, 0},sizeWindowExt = {0, 0}; TEXTMETRICW tm; LPRECT lprcDest; int iTabLength = 8; // Default Tab length is 8 characters.
int iLeftMargin; int iRightMargin; BOOL fUseSystemFont;
if (lpDTparams) { /*
* Only if DT_TABSTOP flag is mentioned, we must use the iTabLength field. */ if (TABSTOP(wFormat)) iTabLength = lpDTparams->iTabLength; iLeftMargin = lpDTparams->iLeftMargin; iRightMargin = lpDTparams->iRightMargin; } else { iLeftMargin = iRightMargin = 0; }
/*
* Get the View port and Window extents for the given DC * If this call fails, hdc must be invalid */ if (!UserGetViewportExtEx(hdc,&sizeViewPortExt)) {#ifndef _USERK_
/*
* This call fails on standard Metafiles. So check * if the DC is really invalid to be compatible with * Win9x */ if ((hdc == NULL) || !GdiValidateHandle(hdc))#endif
return FALSE; } UserGetWindowExtEx(hdc, &sizeWindowExt);
/*
* For the current mapping mode, find out the sign of x from left to right. */ lpDrawInfo->iXSign = (((sizeViewPortExt.cx ^ sizeWindowExt.cx) & 0x80000000) ? -1 : 1);
/*
* For the current mapping mode, find out the sign of y from top to bottom. */ lpDrawInfo->iYSign = (((sizeViewPortExt.cy ^ sizeWindowExt.cy) & 0x80000000) ? -1 : 1);
/*
* Calculate the dimensions of the current font in this DC. * (If it is SysFont AND the mapping mode is MM_TEXT, use system font's data) */ fUseSystemFont = ((wFormat & DT_INTERNAL) || IsSysFontAndDefaultMode(hdc)); if (!fUseSystemFont) { /*
* Edit controls have their own way of calculating the aveCharWidth. */ if (EDITCONTROL(wFormat)) { tm.tmAveCharWidth = UserGetCharDimensionsW(hdc, &tm, NULL); tm.tmCharSet = (BYTE)UserGetTextCharsetInfo(hdc, NULL, 0); if (tm.tmAveCharWidth == 0) { fUseSystemFont = TRUE; } } else if (!UserGetTextMetricsW(hdc, &tm)) { /*
* This can fail in a hard error popup during logon or logoff * because UpdatePerUserSystemParameters destroys the server-side * font handle for the DC, and a repaint occurs before we switch * desktops (the switch recreates the popup from scratch with the * new font OK). ChrisWil's changes to move system-wide attributes * into desktops should take care of this in Kernel-mode. This is * just a horrible, horrible hack for now. */ RIPMSG0(RIP_WARNING, "UserGetTextMetricsW failed: only in logon/off?\n"); tm.tmOverhang = 0;
/*
* We should probably set fUseSystemFont to TRUE here. But I * assume that this "horrible hack" works fine plus it has been * here for good. So I'll leave it alone. 6/3/96 */ } }
if (fUseSystemFont) { /*
* Avoid GetTextMetrics for internal calls since they use sys font. */ tm.tmHeight = gpsi->cySysFontChar; tm.tmExternalLeading = gpsi->tmSysFont.tmExternalLeading; tm.tmAveCharWidth = gpsi->tmSysFont.tmAveCharWidth; tm.tmOverhang = gpsi->tmSysFont.tmOverhang;#ifdef _USERK_
tm.tmCharSet = (BYTE)UserGetTextCharsetInfo(gpDispInfo->hdcScreen, NULL, 0);#else
tm.tmCharSet = (BYTE)UserGetTextCharsetInfo(ghdcBits2, NULL, 0);#endif // _USERK_
}
// cyLineHeight is in pixels (This will be signed).
lpDrawInfo->cyLineHeight = (tm.tmHeight + (EXTERNALLEADING(wFormat) ? tm.tmExternalLeading : 0)) * lpDrawInfo->iYSign;
// cxTabLength is the tab length in pixels (This will not be signed)
lpDrawInfo->cxTabLength = tm.tmAveCharWidth * iTabLength;
// Set the cxOverhang
lpDrawInfo->cxOverhang = tm.tmOverhang;
// Pick up the proper TextOut function based on the prefix processing reqd.
#ifdef _USERK_
lpDrawInfo->bCharsetDll = PpiCurrent()->dwLpkEntryPoints & LPK_DRAWTEXTEX; if (lpDrawInfo->bCharsetDll == FALSE) { lpDrawInfo->lpfnTextDraw = (NOPREFIX(wFormat) ? (LPFNTEXTDRAW)UserTextOutWInternal : xxxPSMTextOut); }#else
lpDrawInfo->bCharsetDll = (BOOL)(fpLpkDrawTextEx != (FPLPKDRAWTEXTEX)NULL); if (lpDrawInfo->bCharsetDll == FALSE) { lpDrawInfo->lpfnTextDraw = (NOPREFIX(wFormat) ? (LPFNTEXTDRAW)UserTextOutWInternal : PSMTextOut); }#endif // _USERK_
// Set up the format rectangle based on the margins.
// LCopyStruct(lprc, lprcDest = (LPRECT)&(lpDrawInfo->rcFormat), sizeof(RECT));
lprcDest = &(lpDrawInfo->rcFormat); *lprcDest = *lprc;
// We need to do the following only if the margins are given
if(iLeftMargin | iRightMargin) { lprcDest->left += iLeftMargin * lpDrawInfo->iXSign; lprcDest->right -= (lpDrawInfo->cxRightMargin = iRightMargin * lpDrawInfo->iXSign); } else lpDrawInfo->cxRightMargin = 0; // Initialize to zero.
// cxMaxWidth is unsigned.
lpDrawInfo->cxMaxWidth = (lprcDest->right - lprcDest->left) * lpDrawInfo->iXSign; lpDrawInfo->cxMaxExtent = 0; // Initialize this to zero.
return TRUE;}
/***************************************************************************\
* DT_AdjustWhiteSpaces* In the case of WORDWRAP, we need to treat the white spaces at the* begining/end of each line specially. This function does that.* lpStNext = points to the begining of next line.* lpiCount = points to the count of characters in the current line.\***************************************************************************/
LPCWSTR DT_AdjustWhiteSpaces(LPCWSTR lpStNext, LPINT lpiCount, UINT wFormat){ switch(wFormat & DT_HFMTMASK) { case DT_LEFT: // Prevent a white space at the begining of a left justfied text.
// Is there a white space at the begining of next line......
if((*lpStNext == TEXT(' ')) || (*lpStNext == TEXT('\t'))) { // ...then, exclude it from next line.
lpStNext++; } break;
case DT_RIGHT: // Prevent a white space at the end of a RIGHT justified text.
// Is there a white space at the end of current line,.......
if((*(lpStNext-1) == TEXT(' ')) || (*(lpStNext - 1) == TEXT('\t'))) { // .....then, Skip the white space from the current line.
(*lpiCount)--; } break;
case DT_CENTER: // Exclude white spaces from the begining and end of CENTERed lines.
// If there is a white space at the end of current line.......
if((*(lpStNext-1) == TEXT(' ')) || (*(lpStNext - 1) == TEXT('\t'))) (*lpiCount)--; //...., don't count it for justification.
// If there is a white space at the begining of next line.......
if((*lpStNext == TEXT(' ')) || (*lpStNext == TEXT('\t'))) lpStNext++; //...., exclude it from next line.
break; } return lpStNext;}
/***************************************************************************\
* DT_BreakAWord* A word needs to be broken across lines and this finds out where to* break it.\***************************************************************************/LPCWSTR DT_BreakAWord(HDC hdc, LPCWSTR lpchText, int iLength, int iWidth, UINT wFormat, int iOverhang, LPDRAWTEXTDATA lpDrawInfo, int iCharSet){ int iLow = 0, iHigh = iLength; int iNew;
while((iHigh - iLow) > 1) { iNew = iLow + (iHigh - iLow)/2; if(DT_GetExtentMinusPrefixes(hdc, lpchText, iNew, wFormat, iOverhang, lpDrawInfo, iCharSet) > iWidth) iHigh = iNew; else iLow = iNew; } // If the width is too low, we must print atleast one char per line.
// Else, we will be in an infinite loop.
if(!iLow && iLength) iLow = 1; return (lpchText+iLow);}
/***************************************************************************\
* DT_GetLineBreak* This finds out the location where we can break a line.* Returns LPCSTR to the begining of next line.* Also returns via lpiLineLength, the length of the current line.* NOTE: (lpstNextLineStart - lpstCurrentLineStart) is not equal to the* line length; This is because, we exclude some white spaces at the begining* and/or end of lines; Also, CR/LF is excluded from the line length.\***************************************************************************/
LPWSTR DT_GetLineBreak( HDC hdc, LPCWSTR lpchLineStart, int cchCount, DWORD dwFormat, LPINT lpiLineLength, LPDRAWTEXTDATA lpDrawInfo, int iCharSet){ LPCWSTR lpchText, lpchEnd, lpch, lpchLineEnd; int cxStart, cxExtent, cxNewExtent; BOOL fAdjustWhiteSpaces = FALSE; WCHAR ch; DWORD dwCodePage = USERGETCODEPAGE(hdc);
cxStart = lpDrawInfo->rcFormat.left; cxExtent = cxNewExtent = 0; lpchText = lpchLineStart; lpchEnd = lpchLineStart + cchCount;
while(lpchText < lpchEnd) { lpchLineEnd = lpch = GetNextWordbreak(dwCodePage,lpchText, lpchEnd, dwFormat, lpDrawInfo); // DT_DrawStr does not return the overhang; Otherwise we will end up
// adding one overhang for every word in the string.
// For simulated Bold fonts, the summation of extents of individual
// words in a line is greater than the extent of the whole line. So,
// always calculate extent from the LineStart.
// BUGTAG: #6054 -- Win95B -- SANKAR -- 3/9/95 --
cxNewExtent = DT_DrawStr(hdc, cxStart, 0, lpchLineStart, (int)(((PBYTE)lpch - (PBYTE)lpchLineStart)/sizeof(WCHAR)), FALSE, dwFormat, lpDrawInfo, iCharSet);
if (WORDBREAK(dwFormat) && ((cxNewExtent + lpDrawInfo->cxOverhang) > lpDrawInfo->cxMaxWidth)) { // Are there more than one word in this line?
if (lpchText != lpchLineStart) { lpchLineEnd = lpch = lpchText; fAdjustWhiteSpaces = TRUE; } else { //One word is longer than the maximum width permissible.
//See if we are allowed to break that single word.
if(EDITCONTROL(dwFormat) && !WORDELLIPSIS(dwFormat)) { lpchLineEnd = lpch = DT_BreakAWord(hdc, lpchText, (int)(((PBYTE)lpch - (PBYTE)lpchText)/sizeof(WCHAR)), lpDrawInfo->cxMaxWidth - cxExtent, dwFormat, lpDrawInfo->cxOverhang, lpDrawInfo, iCharSet); //Break that word
//Note: Since we broke in the middle of a word, no need to
// adjust for white spaces.
} else { fAdjustWhiteSpaces = TRUE; // Check if we need to end this line with ellipsis
if(WORDELLIPSIS(dwFormat)) { // Don't do this if already at the end of the string.
if (lpch < lpchEnd) { // If there are CR/LF at the end, skip them.
if ((ch = *lpch) == CR || ch == LF) { if ((++lpch < lpchEnd) && (*lpch == (WCHAR)(ch ^ (LF ^ CR)))) lpch++; fAdjustWhiteSpaces = FALSE; } } } } } // Well! We found a place to break the line. Let us break from this
// loop;
break; } else { // Don't do this if already at the end of the string.
if (lpch < lpchEnd) { if ((ch = *lpch) == CR || ch == LF) { if ((++lpch < lpchEnd) && (*lpch == (WCHAR)(ch ^ (LF ^ CR)))) lpch++; fAdjustWhiteSpaces = FALSE; break; } } }
// Point at the beginning of the next word.
lpchText = lpch; cxExtent = cxNewExtent; }
// Calculate the length of current line.
*lpiLineLength = (INT)((PBYTE)lpchLineEnd - (PBYTE)lpchLineStart)/sizeof(WCHAR);
// Adjust the line length and lpch to take care of spaces.
if(fAdjustWhiteSpaces && (lpch < lpchEnd)) lpch = DT_AdjustWhiteSpaces(lpch, lpiLineLength, dwFormat);
// return the begining of next line;
return (LPWSTR)lpch;}
/***************************************************************************\
* NeedsEndEllipsis()* This function checks whether the given string fits within the given* width or we need to add end-ellipse. If it required end-ellipses, it* returns TRUE and it returns the number of characters that are saved* in the given string via lpCount.\***************************************************************************/BOOL NeedsEndEllipsis(HDC hdc, LPCWSTR lpchText, LPINT lpCount, LPDRAWTEXTDATA lpDTdata, UINT wFormat, LPDRAWTEXTDATA lpDrawInfo, int iCharSet){ int cchText; int ichMin, ichMax, ichMid; int cxMaxWidth; int iOverhang; int cxExtent; SIZE size; cchText = *lpCount; // Get the current count.
if (cchText == 0) return FALSE;
cxMaxWidth = lpDTdata->cxMaxWidth; iOverhang = lpDTdata->cxOverhang;
cxExtent = DT_GetExtentMinusPrefixes(hdc, lpchText, cchText, wFormat, iOverhang, lpDrawInfo, iCharSet);
if (cxExtent <= cxMaxWidth) return FALSE; // Reserve room for the "..." ellipses;
// (Assumption: The ellipses don't have any prefixes!)
UserGetTextExtentPointW(hdc, szEllipsis, CCHELLIPSIS, &size); cxMaxWidth -= size.cx - iOverhang;
// If no room for ellipses, always show first character.
//
ichMax = 1; if (cxMaxWidth > 0) { // Binary search to find characters that will fit.
ichMin = 0; ichMax = cchText; while (ichMin < ichMax) { // Be sure to round up, to make sure we make progress in
// the loop if ichMax == ichMin + 1.
//
ichMid = (ichMin + ichMax + 1) / 2;
cxExtent = DT_GetExtentMinusPrefixes(hdc, lpchText, ichMid, wFormat, iOverhang, lpDrawInfo, iCharSet);
if (cxExtent < cxMaxWidth) ichMin = ichMid; else { if (cxExtent > cxMaxWidth) ichMax = ichMid - 1; else { // Exact match up up to ichMid: just exit.
//
ichMax = ichMid; break; } } }
// Make sure we always show at least the first character...
//
if (ichMax < 1) ichMax = 1; }
*lpCount = ichMax; return TRUE;}
/***************************************************************************\
* BOGUS: The same function is available in SHELL2.DLL also.* We need to remove from one of the places.\***************************************************************************/// Returns a pointer to the last component of a path string.
//
// in:
// path name, either fully qualified or not
//
// returns:
// pointer into the path where the path is. if none is found
// returns a poiter to the start of the path
//
// c:\foo\bar -> bar
// c:\foo -> foo
// c:\foo\ -> c:\foo\ (REVIEW: is this case busted?)
// c:\ -> c:\ (REVIEW: this case is strange)
// c: -> c:
// foo -> foo
/***************************************************************************\
\***************************************************************************/
LPWSTR PathFindFileName(LPCWSTR pPath, int cchText){ LPCWSTR pT;
for (pT = pPath; cchText > 0 && *pPath; pPath++, cchText--) { if ((pPath[0] == TEXT('\\') || pPath[0] == TEXT(':')) && pPath[1]) pT = pPath + 1; }
return (LPWSTR)pT; // REVIEW, should this be const?
}
/***************************************************************************\
* AddPathEllipse():* This adds a path ellipse to the given path name.* Returns TRUE if the resultant string's extent is less the the* cxMaxWidth. FALSE, if otherwise.\***************************************************************************/int AddPathEllipsis( HDC hDC, LPWSTR lpszPath, int cchText, UINT wFormat, int cxMaxWidth, int iOverhang, LPDRAWTEXTDATA lpDrawInfo, int iCharSet){ int iLen; UINT dxFixed, dxEllipsis; LPWSTR lpEnd; /* end of the unfixed string */ LPWSTR lpFixed; /* start of text that we always display */ BOOL bEllipsisIn; int iLenFixed; SIZE size;
lpFixed = PathFindFileName(lpszPath, cchText); if (lpFixed != lpszPath) lpFixed--; // point at the slash
else return cchText;
lpEnd = lpFixed; bEllipsisIn = FALSE; iLenFixed = cchText - (int)(lpFixed - lpszPath); dxFixed = DT_GetExtentMinusPrefixes(hDC, lpFixed, iLenFixed, wFormat, iOverhang, lpDrawInfo, iCharSet);
// It is assumed that the "..." string does not have any prefixes ('&').
UserGetTextExtentPointW(hDC, szEllipsis, CCHELLIPSIS, &size); dxEllipsis = size.cx - iOverhang;
while (TRUE) { iLen = dxFixed + DT_GetExtentMinusPrefixes(hDC, lpszPath, (int)((PBYTE)lpEnd - (PBYTE)lpszPath)/sizeof(WCHAR), wFormat, iOverhang, lpDrawInfo, iCharSet) - iOverhang;
if (bEllipsisIn) iLen += dxEllipsis;
if (iLen <= cxMaxWidth) break;
bEllipsisIn = TRUE;
if (lpEnd <= lpszPath) { /* Things didn't fit. */ lpEnd = lpszPath; break; }
/* Step back a character. */ lpEnd--; }
if (bEllipsisIn && (lpEnd + CCHELLIPSIS < lpFixed)) { // NOTE: the strings could over lap here. So, we use LCopyStruct.
RtlMoveMemory((lpEnd + CCHELLIPSIS), lpFixed, iLenFixed * sizeof(WCHAR)); RtlCopyMemory(lpEnd, szEllipsis, CCHELLIPSIS * sizeof(WCHAR));
cchText = (int)(lpEnd - lpszPath) + CCHELLIPSIS + iLenFixed;
// now we can NULL terminate the string
*(lpszPath + cchText) = TEXT('\0'); }
return cchText;}
//-----------------------------------------------------------------------
// This function returns the number of characters actually drawn.
//-----------------------------------------------------------------------
int AddEllipsisAndDrawLine( HDC hdc, int yLine, LPCWSTR lpchText, int cchText, DWORD dwDTformat, LPDRAWTEXTDATA lpDrawInfo, int iCharSet){ LPWSTR pEllipsis = NULL; WCHAR szTempBuff[MAXBUFFSIZE]; LPWSTR lpDest; BOOL fAlreadyCopied = FALSE;
// Check if this is a filename with a path AND
// Check if the width is too narrow to hold all the text.
if(PATHELLIPSIS(dwDTformat) && ((DT_GetExtentMinusPrefixes(hdc, lpchText, cchText, dwDTformat, lpDrawInfo->cxOverhang, lpDrawInfo, iCharSet)) > lpDrawInfo->cxMaxWidth)) { // We need to add Path-Ellipsis. See if we can do it in-place.
if(!MODIFYSTRING(dwDTformat)) { // NOTE: When you add Path-Ellipsis, the string could grow by
// CCHELLIPSIS bytes.
if((cchText + CCHELLIPSIS + 1) <= MAXBUFFSIZE) lpDest = szTempBuff; else { // Alloc from local heap.
// Alloc the buffer from local heap.
if(!(pEllipsis = (LPWSTR)UserRtlAllocMem( (cchText+CCHELLIPSIS+1)*sizeof(WCHAR)))) return 0; lpDest = (LPWSTR)pEllipsis; } // Source String may not be NULL terminated. So, copy just
// the given number of characters.
RtlCopyMemory(lpDest, lpchText, cchText*sizeof(WCHAR)); lpchText = lpDest; // lpchText points to the copied buff.
fAlreadyCopied = TRUE; // Local copy has been made.
} // Add the path ellipsis now!
cchText = AddPathEllipsis(hdc, (LPWSTR)lpchText, cchText, dwDTformat, lpDrawInfo->cxMaxWidth, lpDrawInfo->cxOverhang, lpDrawInfo, iCharSet); }
// Check if end-ellipsis are to be added.
if((ENDELLIPSIS(dwDTformat) || WORDELLIPSIS(dwDTformat)) && NeedsEndEllipsis(hdc, lpchText, &cchText, lpDrawInfo, dwDTformat, lpDrawInfo, iCharSet)) { // We need to add end-ellipsis; See if we can do it in-place.
if(!MODIFYSTRING(dwDTformat) && !fAlreadyCopied) { // See if the string is small enough for the buff on stack.
if((cchText+CCHELLIPSIS+1) <= MAXBUFFSIZE) lpDest = szTempBuff; // If so, use it.
else { // Alloc the buffer from local heap.
if(!(pEllipsis = (LPWSTR)UserRtlAllocMem( (cchText+CCHELLIPSIS+1)*sizeof(WCHAR)))) return 0; lpDest = pEllipsis; } // Make a copy of the string in the local buff.
RtlCopyMemory(lpDest, lpchText, cchText*sizeof(WCHAR)); lpchText = lpDest; } // Add an end-ellipsis at the proper place.
RtlCopyMemory((LPWSTR)(lpchText+cchText), szEllipsis, (CCHELLIPSIS+1)*sizeof(WCHAR)); cchText += CCHELLIPSIS; }
// Draw the line that we just formed.
DT_DrawJustifiedLine(hdc, yLine, lpchText, cchText, dwDTformat, lpDrawInfo, iCharSet);
// Free the block allocated for End-Ellipsis.
if(pEllipsis) UserRtlFreeMem(pEllipsis);
return cchText;}
/***************************************************************************\
* IDrawTextEx* This is the new DrawText API\***************************************************************************/
/***************************************************************************\
* IDrawTextEx* This is the new DrawText API\***************************************************************************/
int DrawTextExW( HDC hdc, LPWSTR lpchText, int cchText, LPRECT lprc, UINT dwDTformat, LPDRAWTEXTPARAMS lpDTparams){ /*
* The LPK requires a charset. The Unicode entry point always passes a -1, * but the ANSI entry point passes a more interesting value. Both the * 'W' version and 'A' version of DrawTextEx call this common worker routine. */ return DrawTextExWorker(hdc, lpchText, cchText, lprc, dwDTformat, lpDTparams, -1);}
int DrawTextExWorker( HDC hdc, LPWSTR lpchText, int cchText, LPRECT lprc, UINT dwDTformat, LPDRAWTEXTPARAMS lpDTparams, int iCharset){ DRAWTEXTDATA DrawInfo; WORD wFormat = LOWORD(dwDTformat); LPWSTR lpchTextBegin; LPWSTR lpchEnd; LPWSTR lpchNextLineSt; int iLineLength; int iySign; int yLine; int yLastLineHeight; HRGN hrgnClip; int iLineCount; RECT rc; BOOL fLastLine; WCHAR ch; UINT oldAlign;
#if DBG
if (dwDTformat & ~DT_VALID) RIPMSG0 (RIP_WARNING, "DrawTextExW: Invalid dwDTformat flags");#endif
if (lpchText == NULL) { return 0; }
if (cchText == 0 && *lpchText) { /*
* infoview.exe passes lpchText that points to '\0' * * "Microsoft Expedia Streets and Trips 2000" and "MS MapPoint 2000" * tries cchText == 0 to detect if DrawTextW is supported. */
/* Added by Chicago:
* Lotus Notes doesn't like getting a zero return here */ return 1; }
if (cchText == -1) cchText = wcslen(lpchText);
if ((lpDTparams) && (lpDTparams->cbSize != sizeof(DRAWTEXTPARAMS))) { RIPERR1(ERROR_INVALID_PARAMETER, RIP_WARNING, "DrawTextEx: cbSize %ld is invalid", lpDTparams->cbSize); return 0; }
#ifdef LATER
/*
* If DT_MODIFYSTRING is specified, then check for read-write pointer. */ if (MODIFYSTRING(dwDTformat) && (ENDELLIPSIS(dwDTformat) || PATHELLIPSIS(dwDTformat))) { if(IsBadWritePtr(lpchText, cchText)) { RIPERR0(ERROR_INVALID_PARAMETER, RIP_WARNING, "DrawTextEx: For DT_MODIFYSTRING, lpchText must be read-write"); return(0); } }#endif
/*
* Initialize the DrawInfo structure. */ if (!DT_InitDrawTextInfo(hdc, lprc, dwDTformat, (LPDRAWTEXTDATA)&DrawInfo, lpDTparams)) return 0;
DrawInfo.iCharset = iCharset; /*
* If the rect is too narrow or the margins are too wide.....Just forget it! * * If wordbreak is specified, the MaxWidth must be a reasonable value. * This check is sufficient because this will allow CALCRECT and NOCLIP * cases. --SANKAR. * * This also fixed all of our known problems with AppStudio. */ if (DrawInfo.cxMaxWidth <= 0) {
/*
* We used to return a non-zero value in win31. * If the kernel calls this we are always Ver 4.0 or above */#ifdef _USERK_
if (0) {#else
if (GETAPPVER() < VER40) {#endif
if((DrawInfo.cxMaxWidth == 0) && !CALCRECT(wFormat)) { return(1); } } else { if (WORDBREAK(wFormat)) { RIPMSG0 (RIP_WARNING, "DrawTextExW: FAILURE DrawInfo.cxMaxWidth <=0"); return (1); } } }
/*
* if we're not doing the drawing, initialise the lpk-dll */ if (RTLREADING(dwDTformat)) { oldAlign = UserSetTextAlign(hdc, TA_RTLREADING | UserGetTextAlign(hdc)); }
/*
* If we need to clip, let us do that. */ if (!NOCLIP(wFormat)) { //
// Save clipping region so we can restore it later.
//
// hrgnSave = SaveClipRgn(hdc);
// IntersectClipRect(hdc, lprc->left, lprc->top, lprc->right, lprc->bottom);
hrgnClip = UserCreateRectRgn(0,0,0,0); if (hrgnClip != NULL) { if (UserGetClipRgn(hdc, hrgnClip) != 1) { UserDeleteObject(hrgnClip); hrgnClip = (HRGN)-1; } rc = *lprc; UserIntersectClipRect(hdc, rc.left, rc.top, rc.right, rc.bottom); } } else { hrgnClip = NULL; }
lpchTextBegin = lpchText; lpchEnd = lpchText + cchText;
ProcessDrawText:
iLineCount = 0; // Reset number of lines to 1.
yLine = lprc->top;
if (SINGLELINE(wFormat)) { iLineCount = 1; // It is a single line.
/*
* Process single line DrawText. */ switch (wFormat & DT_VFMTMASK) { case DT_BOTTOM: yLine = lprc->bottom - DrawInfo.cyLineHeight; break;
case DT_VCENTER: yLine = lprc->top + ((lprc->bottom - lprc->top - DrawInfo.cyLineHeight) / 2); break; }
cchText = AddEllipsisAndDrawLine(hdc, yLine, lpchText, cchText, dwDTformat, &DrawInfo, iCharset); yLine += DrawInfo.cyLineHeight; lpchText += cchText; } else {
/*
* Multiline * If the height of the rectangle is not an integral multiple of the * average char height, then it is possible that the last line drawn * is only partially visible. However, if DT_EDITCONTROL style is * specified, then we must make sure that the last line is not drawn if * it is going to be partially visible. This will help imitate the * appearance of an edit control. */ if (EDITCONTROL(wFormat)) yLastLineHeight = DrawInfo.cyLineHeight; else yLastLineHeight = 0;
iySign = DrawInfo.iYSign; fLastLine = FALSE; // Process multiline DrawText.
while ((lpchText < lpchEnd) && (!fLastLine)) { // Check if the line we are about to draw is the last line that needs
// to be drawn.
// Let us check if the display goes out of the clip rect and if so
// let us stop here, as an optimisation;
if (!CALCRECT(wFormat) && // We don't need to calc rect?
(!NOCLIP(wFormat)) && // Must we clip the display ?
// Are we outside the rect?
((yLine + DrawInfo.cyLineHeight + yLastLineHeight)*iySign > (lprc->bottom*iySign))) { fLastLine = TRUE; // Let us quit this loop
}
/*
* We do the Ellipsis processing only for the last line. */ if (fLastLine && (ENDELLIPSIS(dwDTformat) || PATHELLIPSIS(dwDTformat))) { lpchText += AddEllipsisAndDrawLine(hdc, yLine, lpchText, cchText, dwDTformat, &DrawInfo, iCharset); } else { lpchNextLineSt = (LPWSTR)DT_GetLineBreak(hdc, lpchText, cchText, dwDTformat, &iLineLength, &DrawInfo, iCharset);
/*
* Check if we need to put ellipsis at the end of this line. * Also check if this is the last line. */ if (WORDELLIPSIS(dwDTformat) || ((lpchNextLineSt >= lpchEnd) && (ENDELLIPSIS(dwDTformat) || PATHELLIPSIS(dwDTformat)))) AddEllipsisAndDrawLine(hdc, yLine, lpchText, iLineLength, dwDTformat, &DrawInfo, iCharset); else DT_DrawJustifiedLine(hdc, yLine, lpchText, iLineLength, dwDTformat, &DrawInfo, iCharset); cchText -= (int)((PBYTE)lpchNextLineSt - (PBYTE)lpchText) / sizeof(WCHAR); lpchText = lpchNextLineSt; } iLineCount++; // We draw one more line.
yLine += DrawInfo.cyLineHeight; }
/*
* For Win3.1 and NT compatibility, if the last char is a CR or a LF * then the height returned includes one more line. */ if (!EDITCONTROL(dwDTformat) && (lpchEnd > lpchTextBegin) && // If zero length it will fault.
(((ch = (*(lpchEnd-1))) == CR) || (ch == LF))) yLine += DrawInfo.cyLineHeight; }
/*
* If DT_CALCRECT, modify width and height of rectangle to include * all of the text drawn. */ if (CALCRECT(wFormat)) { DrawInfo.rcFormat.right = DrawInfo.rcFormat.left + DrawInfo.cxMaxExtent * DrawInfo.iXSign; lprc->right = DrawInfo.rcFormat.right + DrawInfo.cxRightMargin;
// If the Width is more than what was provided, we have to redo all
// the calculations, because, the number of lines can be less now.
// (We need to do this only if we have more than one line).
if((iLineCount > 1) && (DrawInfo.cxMaxExtent > DrawInfo.cxMaxWidth)) { DrawInfo.cxMaxWidth = DrawInfo.cxMaxExtent; lpchText = lpchTextBegin; cchText = (int)((PBYTE)lpchEnd - (PBYTE)lpchTextBegin)/sizeof(WCHAR); goto ProcessDrawText; // Start all over again!
} lprc->bottom = yLine; }
// if (!NOCLIP(wFormat))
// {
// RestoreClipRgn(hdc, hrgnClip);
// }
if (hrgnClip != NULL) { if (hrgnClip == (HRGN)-1) { UserExtSelectClipRgn(hdc, NULL, RGN_COPY); } else { UserExtSelectClipRgn(hdc, hrgnClip, RGN_COPY); UserDeleteObject(hrgnClip); } }
if (RTLREADING(dwDTformat)) UserSetTextAlign(hdc, oldAlign);
/*
* Copy the number of characters actually drawn */ if(lpDTparams != NULL) lpDTparams->uiLengthDrawn = (UINT)((PBYTE)lpchText - (PBYTE)lpchTextBegin)/sizeof(WCHAR);
if (yLine == lprc->top) return 1;
return (yLine - lprc->top);}
/***************************************************************************\
** IsSysFontAndDefaultMode()** Returns TRUE if font selected into DC is the system font AND the current* mapping mode of the DC is MM_TEXT (Default mode); else returns FALSE. This* is called by interrupt time code so it needs to be in the fixed code* segment.** History:* 07-Jul-95 BradG Ported from Win95\***************************************************************************/
BOOL IsSysFontAndDefaultMode(HDC hdc){ return((UserGetHFONT(hdc) == ghFontSys) && (UserGetMapMode(hdc) == MM_TEXT));}
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