teraterm/teraterm/buffer.c

/* Tera Term
 Copyright(C) 1994-1998 T. Teranishi
 All rights reserved. */

/* TERATERM.EXE, scroll buffer routines */

#include "teraterm.h"
#include "tttypes.h"
#include <string.h>

#include "ttwinman.h"
#include "teraprn.h"
#include "vtdisp.h"
#include "clipboar.h"
#include "telnet.h"
#include "ttplug.h" /* TTPLUG */

#include "buffer.h"

// URLを強調する（石崎氏パッチ 2005/4/2）
#define URL_EMPHASIS 1

#define BuffXMax TermWidthMax
//#define BuffYMax 100000
//#define BuffSizeMax 8000000
// スクロールバッファの最大長を拡張 (2004.11.28 yutaka)
#define BuffYMax 500000
#define BuffSizeMax (BuffYMax * 80)

// status line
int StatusLine; //0: none 1: shown 
/* top & bottom margin */
int CursorTop, CursorBottom;
BOOL Selected;
BOOL Wrap;

static WORD TabStops[256];
static int NTabStops;

static WORD BuffLock = 0;
static HANDLE HCodeBuff = 0;
static HANDLE HAttrBuff = 0;
static HANDLE HAttrBuff2 = 0;
static HANDLE HAttrBuffFG = 0;
static HANDLE HAttrBuffBG = 0;

static PCHAR CodeBuff;  /* Character code buffer */
static PCHAR AttrBuff;  /* Attribute buffer */
static PCHAR AttrBuff2; /* Color attr buffer */
static PCHAR AttrBuffFG; /* Foreground color attr buffer */
static PCHAR AttrBuffBG; /* Background color attr buffer */
static PCHAR CodeLine;
static PCHAR AttrLine;
static PCHAR AttrLine2;
static PCHAR AttrLineFG;
static PCHAR AttrLineBG;
static LONG LinePtr;
static LONG BufferSize;
static int NumOfLinesInBuff;
static int BuffStartAbs, BuffEndAbs;
static POINT SelectStart, SelectEnd, SelectEndOld;
static BOOL BoxSelect;
static POINT DblClkStart, DblClkEnd;

static int StrChangeStart, StrChangeCount;

static BOOL SeveralPageSelect;  // add (2005.5.15 yutaka)

static TCharAttr CurCharAttr;

LONG GetLinePtr(int Line)
{
  LONG Ptr;

  Ptr = (LONG)(BuffStartAbs + Line) *
        (LONG)(NumOfColumns);
  while (Ptr>=BufferSize)
    Ptr = Ptr - BufferSize;
  return Ptr;
}

LONG NextLinePtr(LONG Ptr)
{
  Ptr = Ptr + (LONG)NumOfColumns;
  if (Ptr >= BufferSize)
    Ptr = Ptr - BufferSize;
  return Ptr;
}

LONG PrevLinePtr(LONG Ptr)
{
  Ptr = Ptr - (LONG)NumOfColumns;
  if (Ptr < 0) Ptr = Ptr + BufferSize;
  return Ptr;
}

BOOL ChangeBuffer(int Nx, int Ny)
{
  HANDLE HCodeNew, HAttrNew, HAttr2New, HAttrFGNew, HAttrBGNew;
  LONG NewSize;
  int NxCopy, NyCopy, i;
  PCHAR CodeDest, AttrDest, AttrDest2, AttrDestFG, AttrDestBG;
  PCHAR Ptr;
  LONG SrcPtr, DestPtr;
  WORD LockOld;

  if (Nx > BuffXMax) Nx = BuffXMax;
  if (ts.ScrollBuffMax > BuffYMax)
    ts.ScrollBuffMax = BuffYMax;
  if (Ny > ts.ScrollBuffMax) Ny = ts.ScrollBuffMax;
 
  if ( (LONG)Nx * (LONG)Ny > BuffSizeMax )
    Ny = BuffSizeMax / Nx;

  NewSize = (LONG)Nx * (LONG)Ny;

  HCodeNew = GlobalAlloc(GMEM_MOVEABLE, NewSize);
  if ( HCodeNew==0 ) return FALSE;
  Ptr = GlobalLock(HCodeNew);
  if ( Ptr==NULL )
  {
    GlobalFree(HCodeNew);
    return FALSE;
  }
  CodeDest = Ptr;

  HAttrNew = GlobalAlloc(GMEM_MOVEABLE, NewSize);
  if ( HAttrNew==0 )
  {
    GlobalFree(HCodeNew);
    return FALSE;
  }
  Ptr = GlobalLock(HAttrNew);
  if ( Ptr==NULL )
  {
    GlobalFree(HCodeNew);
    GlobalFree(HAttrNew);
    return FALSE;
  }
  AttrDest = Ptr;

  HAttr2New = GlobalAlloc(GMEM_MOVEABLE, NewSize);
  if ( HAttr2New==0 )
  {
    GlobalFree(HCodeNew);
    GlobalFree(HAttrNew);
    return FALSE;
  }
  Ptr = GlobalLock(HAttr2New);
  if ( Ptr==NULL )
  {
    GlobalFree(HCodeNew);
    GlobalFree(HAttrNew);
    GlobalFree(HAttr2New);
    return FALSE;
  }
  AttrDest2 = Ptr;

  HAttrFGNew = GlobalAlloc(GMEM_MOVEABLE, NewSize);
  if ( HAttrFGNew==0 )
  {
    GlobalFree(HCodeNew);
    GlobalFree(HAttrNew);
    GlobalFree(HAttr2New);
    return FALSE;
  }
  Ptr = GlobalLock(HAttrFGNew);
  if ( Ptr==NULL )
  {
    GlobalFree(HCodeNew);
    GlobalFree(HAttrNew);
    GlobalFree(HAttr2New);
    GlobalFree(HAttrFGNew);
    return FALSE;
  }
  AttrDestFG = Ptr;

  HAttrBGNew = GlobalAlloc(GMEM_MOVEABLE, NewSize);
  if ( HAttrBGNew==0 )
  {
    GlobalFree(HCodeNew);
    GlobalFree(HAttrNew);
    GlobalFree(HAttr2New);
    GlobalFree(HAttrFGNew);
    return FALSE;
  }
  Ptr = GlobalLock(HAttrBGNew);
  if ( Ptr==NULL )
  {
    GlobalFree(HCodeNew);
    GlobalFree(HAttrNew);
    GlobalFree(HAttr2New);
    GlobalFree(HAttrFGNew);
    GlobalFree(HAttrBGNew);
    return FALSE;
  }
  AttrDestBG = Ptr;

  memset(&CodeDest[0], 0x20, NewSize);
  memset(&AttrDest[0], AttrDefault, NewSize);
  memset(&AttrDest2[0], AttrDefault, NewSize);
  memset(&AttrDestFG[0], AttrDefaultFG, NewSize);
  memset(&AttrDestBG[0], AttrDefaultBG, NewSize);
  if ( HCodeBuff!=0 )
  {
    if ( NumOfColumns > Nx )
      NxCopy = Nx;
    else NxCopy = NumOfColumns;
    if ( BuffEnd > Ny )
      NyCopy = Ny;
    else NyCopy = BuffEnd;
    LockOld = BuffLock;
    LockBuffer();
    SrcPtr = GetLinePtr(BuffEnd-NyCopy);
    DestPtr = 0;
    for (i = 1 ; i <= NyCopy ; i++)
    {
      memcpy(&CodeDest[DestPtr],&CodeBuff[SrcPtr],NxCopy);
      memcpy(&AttrDest[DestPtr],&AttrBuff[SrcPtr],NxCopy);
      memcpy(&AttrDest2[DestPtr],&AttrBuff2[SrcPtr],NxCopy);
      memcpy(&AttrDestFG[DestPtr],&AttrBuffFG[SrcPtr],NxCopy);
      memcpy(&AttrDestBG[DestPtr],&AttrBuffBG[SrcPtr],NxCopy);
      SrcPtr = NextLinePtr(SrcPtr);
      DestPtr = DestPtr + (LONG)Nx;
    }
    FreeBuffer();
  }
  else {
    LockOld = 0;
    NyCopy = NumOfLines;
    Selected = FALSE;
  }

  if (Selected)
  {
    SelectStart.y =
      SelectStart.y - BuffEnd + NyCopy;
    SelectEnd.y =
      SelectEnd.y - BuffEnd + NyCopy;
    if (SelectStart.y < 0)
    {
      SelectStart.y = 0;
      SelectStart.x = 0;
    }
    if (SelectEnd.y<0)
    {
      SelectEnd.x = 0;
      SelectEnd.y = 0;
    }

    Selected = (SelectEnd.y > SelectStart.y) ||
                ((SelectEnd.y=SelectStart.y) &&
                 (SelectEnd.x > SelectStart.x));
  }

  HCodeBuff = HCodeNew;
  HAttrBuff = HAttrNew;
  HAttrBuff2 = HAttr2New;
  HAttrBuffFG = HAttrFGNew;
  HAttrBuffBG = HAttrBGNew;
  BufferSize = NewSize;
  NumOfLinesInBuff = Ny;
  BuffStartAbs = 0;
  BuffEnd = NyCopy;

  if (BuffEnd==NumOfLinesInBuff)
    BuffEndAbs = 0;
  else
    BuffEndAbs = BuffEnd;

  PageStart = BuffEnd - NumOfLines;

  LinePtr = 0;
  if (LockOld>0)
  {
    CodeBuff = (PCHAR)GlobalLock(HCodeBuff);
    AttrBuff = (PCHAR)GlobalLock(HAttrBuff);
    AttrBuff2 = (PCHAR)GlobalLock(HAttrBuff2);
    AttrBuffFG = (PCHAR)GlobalLock(HAttrBuffFG);
    AttrBuffBG = (PCHAR)GlobalLock(HAttrBuffBG);
    CodeLine = CodeBuff;
    AttrLine = AttrBuff;
    AttrLine2 = AttrBuff2;
    AttrLineFG = AttrBuffFG;
    AttrLineBG = AttrBuffBG;
  }
  else {
    GlobalUnlock(HCodeNew);
    GlobalUnlock(HAttrNew);
  }
  BuffLock = LockOld;

  return TRUE;
}

void InitBuffer()
{
  int Ny;

  /* setup terminal */
  NumOfColumns = ts.TerminalWidth;
  NumOfLines = ts.TerminalHeight;

  /* setup window */
  if (ts.EnableScrollBuff>0)
  {
    if (ts.ScrollBuffSize < NumOfLines)
      ts.ScrollBuffSize = NumOfLines;
    Ny = ts.ScrollBuffSize;
  }
  else
    Ny = NumOfLines;

  if (! ChangeBuffer(NumOfColumns,Ny))
    PostQuitMessage(0);

  if (ts.EnableScrollBuff>0)
    ts.ScrollBuffSize = NumOfLinesInBuff;

  StatusLine = 0;
}

void NewLine(int Line)
{
  LinePtr = GetLinePtr(Line);
  CodeLine = &CodeBuff[LinePtr];
  AttrLine = &AttrBuff[LinePtr];
  AttrLine2 = &AttrBuff2[LinePtr];
  AttrLineFG = &AttrBuffFG[LinePtr];
  AttrLineBG = &AttrBuffBG[LinePtr];
}

void LockBuffer()
{
  BuffLock++;
  if (BuffLock>1) return;
  CodeBuff = (PCHAR)GlobalLock(HCodeBuff);
  AttrBuff = (PCHAR)GlobalLock(HAttrBuff);
  AttrBuff2 = (PCHAR)GlobalLock(HAttrBuff2);
  AttrBuffFG = (PCHAR)GlobalLock(HAttrBuffFG);
  AttrBuffBG = (PCHAR)GlobalLock(HAttrBuffBG);
  NewLine(PageStart+CursorY);
}

void UnlockBuffer()
{
  if (BuffLock==0) return;
  BuffLock--;
  if (BuffLock>0) return;
  if (HCodeBuff!=NULL)
    GlobalUnlock(HCodeBuff);
  if (HAttrBuff!=NULL)
    GlobalUnlock(HAttrBuff);
  if (HAttrBuff2!=NULL)
    GlobalUnlock(HAttrBuff2);
  if (HAttrBuffFG!=NULL)
    GlobalUnlock(HAttrBuffFG);
  if (HAttrBuffBG!=NULL)
    GlobalUnlock(HAttrBuffBG);
}

void FreeBuffer()
{
  BuffLock = 1;
  UnlockBuffer();
  if (HCodeBuff!=NULL)
  {
    GlobalFree(HCodeBuff);
    HCodeBuff = NULL;
  }
  if (HAttrBuff!=NULL)
  {
    GlobalFree(HAttrBuff);
    HAttrBuff = NULL;
  }
  if (HAttrBuff2!=NULL)
  {
    GlobalFree(HAttrBuff2);
    HAttrBuff2 = NULL;
  }
  if (HAttrBuffFG!=NULL)
  {
    GlobalFree(HAttrBuffFG);
    HAttrBuffFG = NULL;
  }
  if (HAttrBuffBG!=NULL)
  {
    GlobalFree(HAttrBuffBG);
    HAttrBuffBG = NULL;
  }
}

void BuffAllSelect()
{
        SelectStart.x = 0;
        SelectStart.y = 0;
        SelectEnd.x = 0;
        SelectEnd.y = BuffEnd;
//      SelectEnd.x = NumOfColumns;
//      SelectEnd.y = BuffEnd - 1;
}

void BuffScreenSelect()
{
        int X, Y;
        DispConvWinToScreen(0, 0, &X, &Y, NULL);
        SelectStart.x = X;
        SelectStart.y = Y + PageStart;
        SelectEnd.x = 0;
        SelectEnd.y = SelectStart.y + NumOfLines;
//      SelectEnd.x = X + NumOfColumns;
//      SelectEnd.y = Y + PageStart + NumOfLines - 1;
}

void BuffCancelSelection()
{
        SelectStart.x = 0;
        SelectStart.y = 0;
        SelectEnd.x = 0;
        SelectEnd.y = 0;
}

void BuffReset()
// Reset buffer status. don't update real display
//   called by ResetTerminal()
{
  int i;

  /* Cursor */
  NewLine(PageStart);
  WinOrgX = 0;
  WinOrgY = 0;
  NewOrgX = 0;
  NewOrgY = 0;

  /* Top/bottom margin */
  CursorTop = 0;
  CursorBottom = NumOfLines-1;

  /* Tab stops */
  NTabStops = (NumOfColumns-1) >> 3;
  for (i=1 ; i<=NTabStops ; i++)
    TabStops[i-1] = i*8;

  /* Initialize text selection region */
  SelectStart.x = 0;
  SelectStart.y = 0;
  SelectEnd = SelectStart;
  SelectEndOld = SelectStart;
  Selected = FALSE;

  StrChangeCount = 0;
  Wrap = FALSE;
  StatusLine = 0;

  SeveralPageSelect = FALSE; // yutaka
}

void BuffScroll(int Count, int Bottom)
{
  int i, n;
  LONG SrcPtr, DestPtr;
  int BuffEndOld;

  if (Count>NumOfLinesInBuff)
    Count = NumOfLinesInBuff;

  DestPtr = GetLinePtr(PageStart+NumOfLines-1+Count);
  n = Count;
  if (Bottom<NumOfLines-1)
  {
    SrcPtr = GetLinePtr(PageStart+NumOfLines-1);
    for (i=NumOfLines-1; i>=Bottom+1; i--)
    {
      memcpy(&(CodeBuff[DestPtr]),&(CodeBuff[SrcPtr]),NumOfColumns);
      memcpy(&(AttrBuff[DestPtr]),&(AttrBuff[SrcPtr]),NumOfColumns);
      memcpy(&(AttrBuff2[DestPtr]),&(AttrBuff2[SrcPtr]),NumOfColumns);
      memcpy(&(AttrBuffFG[DestPtr]),&(AttrBuffFG[SrcPtr]),NumOfColumns);
      memcpy(&(AttrBuffBG[DestPtr]),&(AttrBuffBG[SrcPtr]),NumOfColumns);
      memset(&(CodeBuff[SrcPtr]),0x20,NumOfColumns);
      memset(&(AttrBuff[SrcPtr]),CurCharAttr.Attr,NumOfColumns);
      memset(&(AttrBuff2[SrcPtr]),CurCharAttr.Attr2,NumOfColumns);
      memset(&(AttrBuffFG[SrcPtr]),CurCharAttr.Fore,NumOfColumns);
      memset(&(AttrBuffBG[SrcPtr]),CurCharAttr.Back,NumOfColumns);
      SrcPtr = PrevLinePtr(SrcPtr);
      DestPtr = PrevLinePtr(DestPtr);
      n--;
    }
  }
  for (i = 1 ; i <= n ; i++)
  {
    memset(&CodeBuff[DestPtr],0x20,NumOfColumns);
    memset(&AttrBuff[DestPtr],CurCharAttr.Attr,NumOfColumns);
    memset(&AttrBuff2[DestPtr],CurCharAttr.Attr2,NumOfColumns);
    memset(&AttrBuffFG[DestPtr],CurCharAttr.Fore,NumOfColumns);
    memset(&AttrBuffBG[DestPtr],CurCharAttr.Back,NumOfColumns);
    DestPtr = PrevLinePtr(DestPtr);
  }

  BuffEndAbs = BuffEndAbs + Count;
  if (BuffEndAbs >= NumOfLinesInBuff)
    BuffEndAbs = BuffEndAbs - NumOfLinesInBuff;
  BuffEndOld = BuffEnd;
  BuffEnd = BuffEnd + Count;
  if (BuffEnd >= NumOfLinesInBuff)
  {
    BuffEnd = NumOfLinesInBuff;
    BuffStartAbs = BuffEndAbs;
  }
  PageStart = BuffEnd-NumOfLines;

  if (Selected)
  {
    SelectStart.y = SelectStart.y - Count + BuffEnd - BuffEndOld;
    SelectEnd.y = SelectEnd.y - Count + BuffEnd - BuffEndOld;
    if ( SelectStart.y<0 )
    {
      SelectStart.x = 0;
      SelectStart.y = 0;
    }
    if ( SelectEnd.y<0 )
    {
      SelectEnd.x = 0;
      SelectEnd.y = 0;
    }
    Selected =
      (SelectEnd.y > SelectStart.y) ||
       ((SelectEnd.y==SelectStart.y) &&
        (SelectEnd.x > SelectStart.x));
  }

  NewLine(PageStart+CursorY);
}

void NextLine()
{
  LinePtr = NextLinePtr(LinePtr);
  CodeLine = &CodeBuff[LinePtr];
  AttrLine = &AttrBuff[LinePtr];
  AttrLine2 = &AttrBuff2[LinePtr];
  AttrLineFG = &AttrBuffFG[LinePtr];
  AttrLineBG = &AttrBuffBG[LinePtr];
}

void PrevLine()
{
  LinePtr = PrevLinePtr(LinePtr);
  CodeLine = &CodeBuff[LinePtr];
  AttrLine = &AttrBuff[LinePtr];
  AttrLine2 = &AttrBuff2[LinePtr];
  AttrLineFG = &AttrBuffFG[LinePtr];
  AttrLineBG = &AttrBuffBG[LinePtr];
}

void EraseKanji(int LR)
{
// If cursor is on left/right half of a Kanji, erase it.
//   LR: left(0)/right(1) flag

  if ((CursorX-LR>=0) &&
      ((AttrLine[CursorX-LR] & AttrKanji) != 0))
  {
    CodeLine[CursorX-LR] = 0x20;
    AttrLine[CursorX-LR] = CurCharAttr.Attr;
    AttrLine2[CursorX-LR] = CurCharAttr.Attr2;
    AttrLineFG[CursorX-LR] = CurCharAttr.Fore;
    AttrLineBG[CursorX-LR] = CurCharAttr.Back;
    if (CursorX-LR+1 < NumOfColumns)
    {
      CodeLine[CursorX-LR+1] = 0x20;
      AttrLine[CursorX-LR+1] = CurCharAttr.Attr;
      AttrLine2[CursorX-LR+1] = CurCharAttr.Attr2;
      AttrLineFG[CursorX-LR+1] = CurCharAttr.Fore;
      AttrLineBG[CursorX-LR+1] = CurCharAttr.Back;
    }
  }
}

void BuffInsertSpace(int Count)
// Insert space characters at the current position
//   Count: Number of characters to be inserted
{
  NewLine(PageStart+CursorY);

  if (ts.Language==IdJapanese)
    EraseKanji(1); /* if cursor is on right half of a kanji, erase the kanji */

  if (Count > NumOfColumns - CursorX)
    Count = NumOfColumns - CursorX;

  memmove(&(CodeLine[CursorX+Count]),&(CodeLine[CursorX]),
          NumOfColumns-Count-CursorX);
  memmove(&(AttrLine[CursorX+Count]),&(AttrLine[CursorX]),
          NumOfColumns-Count-CursorX);
  memmove(&(AttrLine2[CursorX+Count]),&(AttrLine2[CursorX]),
          NumOfColumns-Count-CursorX);
  memmove(&(AttrLineFG[CursorX+Count]),&(AttrLineFG[CursorX]),
          NumOfColumns-Count-CursorX);
  memmove(&(AttrLineBG[CursorX+Count]),&(AttrLineBG[CursorX]),
          NumOfColumns-Count-CursorX);
  memset(&(CodeLine[CursorX]),0x20,Count);
  memset(&(AttrLine[CursorX]),CurCharAttr.Attr,Count);
  memset(&(AttrLine2[CursorX]),CurCharAttr.Attr2,Count);
  memset(&(AttrLineFG[CursorX]),CurCharAttr.Fore,Count);
  memset(&(AttrLineBG[CursorX]),CurCharAttr.Back,Count);
  /* last char in current line is kanji first? */
  if ((AttrLine[NumOfColumns-1] & AttrKanji) != 0)
  {
    /* then delete it */
    CodeLine[NumOfColumns-1] = 0x20;
    AttrLine[NumOfColumns-1] = CurCharAttr.Attr;
    AttrLine2[NumOfColumns-1] = CurCharAttr.Attr2;
    AttrLineFG[NumOfColumns-1] = CurCharAttr.Fore;
    AttrLineBG[NumOfColumns-1] = CurCharAttr.Back;
  }
  BuffUpdateRect(CursorX,CursorY,NumOfColumns-1,CursorY);
}

void BuffEraseCurToEnd()
// Erase characters from cursor to the end of screen
{
  LONG TmpPtr;
  int offset;
  int i, YEnd;

  NewLine(PageStart+CursorY);
  if (ts.Language==IdJapanese)
    EraseKanji(1); /* if cursor is on right half of a kanji, erase the kanji */
  offset = CursorX;
  TmpPtr = GetLinePtr(PageStart+CursorY);
  YEnd = NumOfLines-1;
  if ((StatusLine>0) &&
      (CursorY<NumOfLines-1))
    YEnd--;
  for (i = CursorY ; i <= YEnd ; i++)
  {
    memset(&(CodeBuff[TmpPtr+offset]),0x20,NumOfColumns-offset);
    memset(&(AttrBuff[TmpPtr+offset]),CurCharAttr.Attr,NumOfColumns-offset);
    memset(&(AttrBuff2[TmpPtr+offset]),CurCharAttr.Attr2,NumOfColumns-offset);
    memset(&(AttrBuffFG[TmpPtr+offset]),CurCharAttr.Fore,NumOfColumns-offset);
    memset(&(AttrBuffBG[TmpPtr+offset]),CurCharAttr.Back,NumOfColumns-offset);
    offset = 0;
    TmpPtr = NextLinePtr(TmpPtr);
  }
  /* update window */
  DispEraseCurToEnd(YEnd);
}

void BuffEraseHomeToCur()
// Erase characters from home to cursor
{
  LONG TmpPtr;
  int offset;
  int i, YHome;

  NewLine(PageStart+CursorY);
  if (ts.Language==IdJapanese)
    EraseKanji(0); /* if cursor is on left half of a kanji, erase the kanji */
  offset = NumOfColumns;
  if ((StatusLine>0) && (CursorY==NumOfLines-1))
    YHome = CursorY;
  else
    YHome = 0;
  TmpPtr = GetLinePtr(PageStart+YHome);
  for (i = YHome ; i <= CursorY ; i++)
  {
    if (i==CursorY) offset = CursorX+1;
    memset(&(CodeBuff[TmpPtr]),0x20,offset);
    memset(&(AttrBuff[TmpPtr]),CurCharAttr.Attr,offset);
    memset(&(AttrBuff2[TmpPtr]),CurCharAttr.Attr2,offset);
    memset(&(AttrBuffFG[TmpPtr]),CurCharAttr.Fore,offset);
    memset(&(AttrBuffBG[TmpPtr]),CurCharAttr.Back,offset);
    TmpPtr = NextLinePtr(TmpPtr);
  }

  /* update window */
  DispEraseHomeToCur(YHome);
}

void BuffInsertLines(int Count, int YEnd)
// Insert lines at current position
//   Count: number of lines to be inserted
//   YEnd: bottom line number of scroll region (screen coordinate)
{
  int i;
  LONG SrcPtr, DestPtr;

  BuffUpdateScroll();

  SrcPtr = GetLinePtr(PageStart+YEnd-Count);
  DestPtr = GetLinePtr(PageStart+YEnd);
  for (i= YEnd-Count ; i>=CursorY ; i--)
  {
    memcpy(&(CodeBuff[DestPtr]),&(CodeBuff[SrcPtr]),NumOfColumns);
    memcpy(&(AttrBuff[DestPtr]),&(AttrBuff[SrcPtr]),NumOfColumns);
    memcpy(&(AttrBuff2[DestPtr]),&(AttrBuff2[SrcPtr]),NumOfColumns);
    memcpy(&(AttrBuffFG[DestPtr]),&(AttrBuffFG[SrcPtr]),NumOfColumns);
    memcpy(&(AttrBuffBG[DestPtr]),&(AttrBuffBG[SrcPtr]),NumOfColumns);
    SrcPtr = PrevLinePtr(SrcPtr);
    DestPtr = PrevLinePtr(DestPtr);
  }
  for (i = 1 ; i <= Count ; i++)
  {
    memset(&(CodeBuff[DestPtr]),0x20,NumOfColumns);
    memset(&(AttrBuff[DestPtr]),CurCharAttr.Attr,NumOfColumns);
    memset(&(AttrBuff2[DestPtr]),CurCharAttr.Attr2,NumOfColumns);
    memset(&(AttrBuffFG[DestPtr]),CurCharAttr.Fore,NumOfColumns);
    memset(&(AttrBuffBG[DestPtr]),CurCharAttr.Back,NumOfColumns);
    DestPtr = PrevLinePtr(DestPtr);
  }

  if (! DispInsertLines(Count,YEnd))
    BuffUpdateRect(WinOrgX,CursorY,WinOrgX+WinWidth-1,YEnd);
}

void BuffEraseCharsInLine(int XStart, int Count)
// erase characters in the current line
//  XStart: start position of erasing
//  Count: number of characters to be erased
{
  if (ts.Language==IdJapanese)
    EraseKanji(1); /* if cursor is on right half of a kanji, erase the kanji */

  NewLine(PageStart+CursorY);
  memset(&(CodeLine[XStart]),0x20,Count);
  memset(&(AttrLine[XStart]),CurCharAttr.Attr,Count);
  memset(&(AttrLine2[XStart]),CurCharAttr.Attr2,Count);
  memset(&(AttrLineFG[XStart]),CurCharAttr.Fore,Count);
  memset(&(AttrLineBG[XStart]),CurCharAttr.Back,Count);

  DispEraseCharsInLine(XStart, Count);
}

void BuffDeleteLines(int Count, int YEnd)
// Delete lines from current line
//   Count: number of lines to be deleted
//   YEnd: bottom line number of scroll region (screen coordinate)
{
  int i;
  LONG SrcPtr, DestPtr;

  BuffUpdateScroll();

  SrcPtr = GetLinePtr(PageStart+CursorY+Count);
  DestPtr = GetLinePtr(PageStart+CursorY);
  for (i=CursorY ; i<= YEnd-Count ; i++)
  {
    memcpy(&(CodeBuff[DestPtr]),&(CodeBuff[SrcPtr]),NumOfColumns);
    memcpy(&(AttrBuff[DestPtr]),&(AttrBuff[SrcPtr]),NumOfColumns);
    memcpy(&(AttrBuff2[DestPtr]),&(AttrBuff2[SrcPtr]),NumOfColumns);
    memcpy(&(AttrBuffFG[DestPtr]),&(AttrBuffFG[SrcPtr]),NumOfColumns);
    memcpy(&(AttrBuffBG[DestPtr]),&(AttrBuffBG[SrcPtr]),NumOfColumns);
    SrcPtr = NextLinePtr(SrcPtr);
    DestPtr = NextLinePtr(DestPtr);
  }
  for (i = YEnd+1-Count ; i<=YEnd ; i++)
  {
    memset(&(CodeBuff[DestPtr]),0x20,NumOfColumns);
    memset(&(AttrBuff[DestPtr]),CurCharAttr.Attr,NumOfColumns);
    memset(&(AttrBuff2[DestPtr]),CurCharAttr.Attr2,NumOfColumns);
    memset(&(AttrBuffFG[DestPtr]),CurCharAttr.Fore,NumOfColumns);
    memset(&(AttrBuffBG[DestPtr]),CurCharAttr.Back,NumOfColumns);
    DestPtr = NextLinePtr(DestPtr);
  }

  if (! DispDeleteLines(Count,YEnd))
    BuffUpdateRect(WinOrgX,CursorY,WinOrgX+WinWidth-1,YEnd);
}

void BuffDeleteChars(int Count)
// Delete characters in current line from cursor
//   Count: number of characters to be deleted
{
  NewLine(PageStart+CursorY);

  if (ts.Language==IdJapanese)
  {
    EraseKanji(0); /* if cursor is on left harf of a kanji, erase the kanji */
    EraseKanji(1); /* if cursor on right half... */
  }

  if (Count > NumOfColumns-CursorX) Count = NumOfColumns-CursorX;
  memmove(&(CodeLine[CursorX]),&(CodeLine[CursorX+Count]),
          NumOfColumns-Count-CursorX);
  memmove(&(AttrLine[CursorX]),&(AttrLine[CursorX+Count]),
          NumOfColumns-Count-CursorX);
  memmove(&(AttrLine2[CursorX]),&(AttrLine2[CursorX+Count]),
          NumOfColumns-Count-CursorX);
  memmove(&(AttrLineFG[CursorX]),&(AttrLineFG[CursorX+Count]),
          NumOfColumns-Count-CursorX);
  memmove(&(AttrLineBG[CursorX]),&(AttrLineBG[CursorX+Count]),
          NumOfColumns-Count-CursorX);
  memset(&(CodeLine[NumOfColumns-Count]),0x20,Count);
  memset(&(AttrLine[NumOfColumns-Count]),CurCharAttr.Attr,Count);
  memset(&(AttrLine2[NumOfColumns-Count]),CurCharAttr.Attr2,Count);
  memset(&(AttrLineFG[NumOfColumns-Count]),CurCharAttr.Fore,Count);
  memset(&(AttrLineBG[NumOfColumns-Count]),CurCharAttr.Back,Count);

  BuffUpdateRect(CursorX,CursorY,WinOrgX+WinWidth-1,CursorY);
}

void BuffEraseChars(int Count)
// Erase characters in current line from cursor
//   Count: number of characters to be deleted
{
  NewLine(PageStart+CursorY);

  if (ts.Language==IdJapanese)
  {
    EraseKanji(0); /* if cursor is on left harf of a kanji, erase the kanji */
    EraseKanji(1); /* if cursor on right half... */
  }

  if (Count > NumOfColumns-CursorX) Count = NumOfColumns-CursorX;
  memset(&(CodeLine[CursorX]),0x20,Count);
  memset(&(AttrLine[CursorX]),CurCharAttr.Attr,Count);
  memset(&(AttrLine2[CursorX]),CurCharAttr.Attr2,Count);
  memset(&(AttrLineFG[CursorX]),CurCharAttr.Fore,Count);
  memset(&(AttrLineBG[CursorX]),CurCharAttr.Back,Count);

  /* update window */
  DispEraseCharsInLine(CursorX,Count);
}

void BuffFillWithE()
// Fill screen with 'E' characters
{
  LONG TmpPtr;
  int i;

  TmpPtr = GetLinePtr(PageStart);
  for (i = 0 ; i <= NumOfLines-1-StatusLine ; i++)
  {
    memset(&(CodeBuff[TmpPtr]),'E',NumOfColumns);
    memset(&(AttrBuff[TmpPtr]),CurCharAttr.Attr,NumOfColumns);
    memset(&(AttrBuff2[TmpPtr]),CurCharAttr.Attr2,NumOfColumns);
    memset(&(AttrBuffFG[TmpPtr]),CurCharAttr.Fore,NumOfColumns);
    memset(&(AttrBuffBG[TmpPtr]),CurCharAttr.Back,NumOfColumns);
    TmpPtr = NextLinePtr(TmpPtr);
  }
  BuffUpdateRect(WinOrgX,WinOrgY,WinOrgX+WinWidth-1,WinOrgY+WinHeight-1);
}

void BuffDrawLine(TCharAttr Attr, int Direction, int C)
{ // IO-8256 terminal
  LONG Ptr;
  int i, X, Y;

  if (C==0) return;
  Attr.Attr |= AttrSpecial;

  switch (Direction) {
    case 3:
    case 4:
      if (Direction==3)
      {
        if (CursorY==0) return;
        Y = CursorY-1;
      }
      else {
        if (CursorY==NumOfLines-1-StatusLine) return;
        Y = CursorY+1;
      }
      if (CursorX+C > NumOfColumns)
        C = NumOfColumns-CursorX;
      Ptr = GetLinePtr(PageStart+Y);
      memset(&(CodeBuff[Ptr+CursorX]),'q',C);
      memset(&(AttrBuff[Ptr+CursorX]),Attr.Attr,C);
      memset(&(AttrBuff2[Ptr+CursorX]),Attr.Attr2,C);
      memset(&(AttrBuffFG[Ptr+CursorX]),Attr.Fore,C);
      memset(&(AttrBuffBG[Ptr+CursorX]),Attr.Back,C);
      BuffUpdateRect(CursorX,Y,CursorX+C-1,Y);
      break;
    case 5:
    case 6:
      if (Direction==5)
      {
        if (CursorX==0) return;
        X = CursorX - 1;
      }
      else {
        if (CursorX==NumOfColumns-1)
          X = CursorX-1;
        else
          X = CursorX+1;
      }
      Ptr = GetLinePtr(PageStart+CursorY);
      if (CursorY+C > NumOfLines-StatusLine)
        C = NumOfLines-StatusLine-CursorY;
      for (i=1; i<=C; i++)
      {
        CodeBuff[Ptr+X] = 'x';
        AttrBuff[Ptr+X] = Attr.Attr;
        AttrBuff2[Ptr+X] = Attr.Attr2;
        AttrBuffFG[Ptr+X] = Attr.Fore;
        AttrBuffBG[Ptr+X] = Attr.Back;
        Ptr = NextLinePtr(Ptr);
      }
      BuffUpdateRect(X,CursorY,X,CursorY+C-1);
      break;
  }
}

void BuffEraseBox
  (int XStart, int YStart, int XEnd, int YEnd)
// IO-8256 terminal
{
  int C, i;
  LONG Ptr;

  if (XEnd>NumOfColumns-1)
    XEnd = NumOfColumns-1;
  if (YEnd>NumOfLines-1-StatusLine)
    YEnd = NumOfLines-1-StatusLine;
  if (XStart>XEnd) return;
  if (YStart>YEnd) return;
  C = XEnd-XStart+1;
  Ptr = GetLinePtr(PageStart+YStart);
  for (i=YStart; i<=YEnd; i++)
  {
    if ((XStart>0) &&
        ((AttrBuff[Ptr+XStart-1] & AttrKanji) != 0))
    {
      CodeBuff[Ptr+XStart-1] = 0x20;
      AttrBuff[Ptr+XStart-1] = CurCharAttr.Attr;
      AttrBuff2[Ptr+XStart-1] = CurCharAttr.Attr2;
      AttrBuffFG[Ptr+XStart-1] = CurCharAttr.Fore;
      AttrBuffBG[Ptr+XStart-1] = CurCharAttr.Back;
    }
    if ((XStart+C<NumOfColumns) &&
        ((AttrBuff[Ptr+XStart+C-1] & AttrKanji) != 0))
    {
      CodeBuff[Ptr+XStart+C] = 0x20;
      AttrBuff[Ptr+XStart+C] = CurCharAttr.Attr;
      AttrBuff2[Ptr+XStart+C] = CurCharAttr.Attr2;
      AttrBuffFG[Ptr+XStart+C] = CurCharAttr.Fore;
      AttrBuffBG[Ptr+XStart+C] = CurCharAttr.Back;
    }
    memset(&(CodeBuff[Ptr+XStart]),0x20,C);
    memset(&(AttrBuff[Ptr+XStart]),CurCharAttr.Attr,C);
    memset(&(AttrBuff2[Ptr+XStart]),CurCharAttr.Attr2,C);
    memset(&(AttrBuffFG[Ptr+XStart]),CurCharAttr.Fore,C);
    memset(&(AttrBuffBG[Ptr+XStart]),CurCharAttr.Back,C);
    Ptr = NextLinePtr(Ptr);
  }
  BuffUpdateRect(XStart,YStart,XEnd,YEnd);
}

int LeftHalfOfDBCS(LONG Line, int CharPtr)
// If CharPtr is on the right half of a DBCS character,
// return pointer to the left half
//   Line: points to a line in CodeBuff
//   CharPtr: points to a char
//   return: points to the left half of the DBCS
{
  if ((CharPtr>0) &&
      ((AttrBuff[Line+CharPtr-1] & AttrKanji) != 0))
    CharPtr--;
  return CharPtr;
}

int MoveCharPtr(LONG Line, int *x, int dx)
// move character pointer x by dx character unit
//   in the line specified by Line
//   Line: points to a line in CodeBuff
//   x: points to a character in the line
//   dx: moving distance in character unit (-: left, +: right)
//              One DBCS character is counted as one character.
//      The pointer stops at the beginning or the end of line.
// Output
//   x: new pointer. x points to a SBCS character or
//      the left half of a DBCS character.
//   return: actual moving distance in character unit
{
  int i;

  *x = LeftHalfOfDBCS(Line,*x);
  i = 0;
  while (dx!=0)
  {
    if (dx>0) // move right
    {
      if ((AttrBuff[Line+*x] & AttrKanji) != 0)
      {
        if (*x<NumOfColumns-2)
        {
          i++;
          *x = *x + 2;
        }
      }
      else if (*x<NumOfColumns-1)
      {
        i++;
        (*x)++;
      }
      dx--;
    }
    else { // move left
      if (*x>0)
      {
        i--;
        (*x)--;
      }
      *x = LeftHalfOfDBCS(Line,*x);
      dx++;
    }
  }
  return i;
}

void BuffCBCopy(BOOL Table)
// copy selected text to clipboard
{
  LONG MemSize;
  PCHAR CBPtr;
  LONG TmpPtr;
  int i, j, k, IStart, IEnd;
  BOOL Sp, FirstChar;
  BYTE b;
#ifndef NO_COPYLINE_FIX
  BOOL LineContinued, PrevLineContinued;
  LineContinued = FALSE;
#endif /* NO_COPYLINE_FIX */

  if (TalkStatus==IdTalkCB) return;
  if (! Selected) return;

// --- open clipboard and get CB memory
  if (BoxSelect)
    MemSize = (SelectEnd.x-SelectStart.x+3)*
              (SelectEnd.y-SelectStart.y+1) + 1;
  else 
    MemSize = (SelectEnd.y-SelectStart.y)*
              (NumOfColumns+2) +
              SelectEnd.x - SelectStart.x + 1;
  CBPtr = CBOpen(MemSize);
  if (CBPtr==NULL) return;

// --- copy selected text to CB memory
  LockBuffer();

  CBPtr[0] = 0;
  TmpPtr = GetLinePtr(SelectStart.y);
  k = 0;
  for (j = SelectStart.y ; j<=SelectEnd.y ; j++)
  {
    if (BoxSelect)
    {
      IStart = SelectStart.x;
      IEnd = SelectEnd.x-1;
    }
    else {
      IStart = 0;
      IEnd = NumOfColumns-1;
      if (j==SelectStart.y) IStart = SelectStart.x;
      if (j==SelectEnd.y) IEnd = SelectEnd.x-1;
    }
    i = LeftHalfOfDBCS(TmpPtr,IStart);
    if (i!=IStart)
    {
      if (j==SelectStart.y)
        IStart = i;
      else
        IStart = i + 2;
    }

    // exclude right-side space characters
    IEnd = LeftHalfOfDBCS(TmpPtr,IEnd);
#ifndef NO_COPYLINE_FIX
    PrevLineContinued = LineContinued;
    LineContinued = FALSE;
    if (ts.EnableContinuedLineCopy && j!=SelectEnd.y && !BoxSelect)
    {
      LONG NextTmpPtr = NextLinePtr(TmpPtr);
      if ((AttrBuff[NextTmpPtr] & AttrLineContinued) != 0)
      LineContinued = TRUE;
      if (IEnd == NumOfColumns-1 &&
        (AttrBuff[TmpPtr + IEnd] & AttrLineContinued) != 0)
      MoveCharPtr(TmpPtr,&IEnd,-1);
    }
    if (!LineContinued)
#endif /* NO_COPYLINE_FIX */
    while ((IEnd>0) && (CodeBuff[TmpPtr+IEnd]==0x20))
      MoveCharPtr(TmpPtr,&IEnd,-1);
    if ((IEnd==0) && (CodeBuff[TmpPtr]==0x20))
      IEnd = -1;
    else if ((AttrBuff[TmpPtr+IEnd] & AttrKanji) != 0) /* DBCS first byte? */
      IEnd++;

    Sp = FALSE;
    FirstChar = TRUE;
    i = IStart;
    while (i <= IEnd)
    {
      b = CodeBuff[TmpPtr+i];
      i++;
      if (! Sp)
      {
        if ((Table) && (b<=0x20))
        {
          Sp = TRUE;
          b = 0x09;
        }
#ifndef NO_COPYLINE_FIX
        if ((b!=0x09) || (! FirstChar) || PrevLineContinued)
#else
        if ((b!=0x09) || (! FirstChar))
#endif
        {
          FirstChar = FALSE;
          CBPtr[k] = b;
          k++;
        }
      }
      else {
        if (b>0x20)
        {
          Sp = FALSE;
          FirstChar = FALSE;
          CBPtr[k] = b;
          k++;
        }
      }
    }

#ifndef NO_COPYLINE_FIX
    if (!LineContinued)
#endif /* NO_COPYLINE_FIX */
    if (j < SelectEnd.y)
    {
      CBPtr[k] = 0x0d;
      k++;
      CBPtr[k] = 0x0a;
      k++;
    }

    TmpPtr = NextLinePtr(TmpPtr);
  }
  CBPtr[k] = 0;
#ifndef NO_COPYLINE_FIX
    LineContinued = FALSE;
    if (ts.EnableContinuedLineCopy && j!=SelectEnd.y && !BoxSelect && j<BuffEnd-1)
    {
      LONG NextTmpPtr = NextLinePtr(TmpPtr);
      if ((AttrBuff[NextTmpPtr] & AttrLineContinued) != 0)
      LineContinued = TRUE;
      if (IEnd == NumOfColumns-1 &&
        (AttrBuff[TmpPtr + IEnd] & AttrLineContinued) != 0)
      MoveCharPtr(TmpPtr,&IEnd,-1);
    }
    if (!LineContinued)
#endif /* NO_COPYLINE_FIX */
  UnlockBuffer();

// --- send CB memory to clipboard
  CBClose();
  return;
}

void BuffPrint(BOOL ScrollRegion)
// Print screen or selected text
{
  int Id;
  POINT PrintStart, PrintEnd;
  TCharAttr CurAttr, TempAttr;
  int i, j, count;
  int IStart, IEnd;
  LONG TmpPtr;

  TempAttr = DefCharAttr;

  if (ScrollRegion)
    Id = VTPrintInit(IdPrnScrollRegion);
  else if (Selected)
    Id = VTPrintInit(IdPrnScreen | IdPrnSelectedText);
  else
    Id = VTPrintInit(IdPrnScreen);
  if (Id==IdPrnCancel) return;

  /* set print region */
  if (Id==IdPrnSelectedText)
  {
    /* print selected region */
    PrintStart = SelectStart;
    PrintEnd = SelectEnd;
  }
  else if (Id==IdPrnScrollRegion)
  {
    /* print scroll region */
    PrintStart.x = 0;
    PrintStart.y = PageStart + CursorTop;
    PrintEnd.x = NumOfColumns;
    PrintEnd.y = PageStart + CursorBottom;
  }
  else {
    /* print current screen */
    PrintStart.x = 0;
    PrintStart.y = PageStart;
    PrintEnd.x = NumOfColumns;
    PrintEnd.y = PageStart + NumOfLines - 1;
  }
  if (PrintEnd.y > BuffEnd-1)
    PrintEnd.y = BuffEnd-1;

  LockBuffer();

  TmpPtr = GetLinePtr(PrintStart.y);
  for (j = PrintStart.y ; j <= PrintEnd.y ; j++)
  {
    if (j==PrintStart.y)
      IStart = PrintStart.x;
    else IStart = 0;
    if (j == PrintEnd.y)
      IEnd = PrintEnd.x - 1;
    else
      IEnd = NumOfColumns - 1;

    while ((IEnd>=IStart) &&
           (CodeBuff[TmpPtr+IEnd]==0x20) &&
           (AttrBuff[TmpPtr+IEnd]==AttrDefault) &&
           (AttrBuff2[TmpPtr+IEnd]==AttrDefault))
        IEnd--;

    i = IStart;
    while (i <= IEnd) {
      CurAttr.Attr = AttrBuff[TmpPtr+i] & ~ AttrKanji;
      CurAttr.Attr2 = AttrBuff2[TmpPtr+i];
      CurAttr.Fore = AttrBuffFG[TmpPtr+i];
      CurAttr.Back = AttrBuffBG[TmpPtr+i];

      count = 1;
      while ((i+count <= IEnd) &&
             (CurAttr.Attr == (AttrBuff[TmpPtr+i+count] & ~ AttrKanji)) &&
             (CurAttr.Attr2 == AttrBuff2[TmpPtr+i+count]) &&
             (CurAttr.Fore == AttrBuffFG[TmpPtr+i+count]) &&
             (CurAttr.Back == AttrBuffBG[TmpPtr+i+count]) ||
             (i+count<NumOfColumns) &&
             ((AttrBuff[TmpPtr+i+count-1] & AttrKanji) != 0))
        count++;

      if (TCharAttrCmp(CurAttr, TempAttr) != 0) {
        PrnSetAttr(CurAttr);
        TempAttr = CurAttr;
      }
      PrnOutText(&(CodeBuff[TmpPtr+i]),count);  
      i = i+count;
    }
    PrnNewLine();
    TmpPtr = NextLinePtr(TmpPtr);
  }

  UnlockBuffer();
  VTPrintEnd();
}

void BuffDumpCurrentLine(BYTE TERM)
// Dumps current line to the file (for path through printing)
//   HFile: file handle
//   TERM: terminator character
//      = LF or VT or FF
{
  int i, j;

  i = NumOfColumns;
  while ((i>0) && (CodeLine[i-1]==0x20))
    i--;
  for (j=0; j<i; j++)
    WriteToPrnFile(CodeLine[j],FALSE);
  WriteToPrnFile(0,TRUE);
  if ((TERM>=LF) && (TERM<=FF))
  {
    WriteToPrnFile(0x0d,FALSE);
    WriteToPrnFile(TERM,TRUE);
  }
}


/* begin - ishizaki */
static void markURL(int x)
{
#ifdef URL_EMPHASIS
        // by sakura editor 1.5.2.1: etc_uty.cpp
        static const char       url_char[] = {
          /* +0  +1  +2  +3  +4  +5  +6  +7  +8  +9  +A  +B  +C  +D  +E  +F */
                  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,        /* +00: */
                  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,        /* +10: */
                  0, -1,  0, -1, -1, -1, -1,  0,  0,  0,  0, -1, -1, -1, -1, -1,        /* +20: " !"#$%&'()*+,-./" */
                 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,  0, -1,  0, -1,        /* +30: "0123456789:;<=>?" */
                 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,        /* +40: "@ABCDEFGHIJKLMNO" */
                 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,  0, -1,  0,  0, -1,        /* +50: "PQRSTUVWXYZ[\]^_" */
                  0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,        /* +60: "`abcdefghijklmno" */
                 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,  0,  0,  0, -1,  0,        /* +70: "pqrstuvwxyz{|}~ " */
                /* 0    : not url char
                 * -1   : url char
                 * other: url head char --> url_table array number + 1
                 */
        };
        unsigned char ch = CodeLine[x];

        if (ts.EnableClickableUrl == FALSE)
                return;

        // 直前の行から連結しているか。
        // TODO: 1つ前の行の終端文字が URL の一部なら、強制的に現在の行頭文字もURLの一部とみなす。
        // (2005.4.3 yutaka)
        if (x == 0) {
                if (AttrLine > AttrBuff && (AttrLine[x-1] & AttrURL)) {
                        if (!(ch & 0x80 || url_char[ch]==0)) { // かつURL構成文字なら
                                AttrLine[x] |= AttrURL; 
                        }
                }
                return;
        }

        if ((x-1>=0) && (AttrLine[x-1] & AttrURL) &&
                !(ch & 0x80 || url_char[ch]==0)) {
//              !((CodeLine[x] <= ' ') && !(AttrLine[x] & AttrKanji))) {
                        AttrLine[x] |= AttrURL; 
//              AttrLine[x] |= (AttrURL | AttrUnder); 
                return;
        }

        if ((x-2>=0) && !strncmp(&CodeLine[x-2], "://", 3)) {
                int i, len = 0;
                if ((x-6>=0) && !strncmp(&CodeLine[x-6], "http", 4)) {
                        len = 6;
                }
                if ((x-7>=0) && !strncmp(&CodeLine[x-7], "https", 5)) {
                        len = 7;
                }
                if ((x-6>=0) && !strncmp(&CodeLine[x-6], "news", 4)) {
                        len = 6;
                }
                if ((x-5>=0) && !strncmp(&CodeLine[x-5], "ftp", 3)) {
                        len = 5;
                }
                if ((x-5>=0) && !strncmp(&CodeLine[x-5], "mms", 3)) {
                        len = 5;
                }
#if 0
                if ((x-5>=0) && !strncmp(&CodeLine[x-5], "ttp", 3)) {
                        len = 5;
                }
#endif
                for (i = 0; i <= len; i++) {
                                AttrLine[x-i] |= AttrURL; 
//                      AttrLine[x-i] |= (AttrURL | AttrUnder); 
                }
        }
#endif
}
/* end - ishizaki */

void BuffPutChar(BYTE b, TCharAttr Attr, BOOL Insert)
// Put a character in the buffer at the current position
//   b: character
//   Attr: attributes
//   Insert: Insert flag
{
  int XStart;

  if (ts.Language==IdJapanese)
  {
    EraseKanji(1); /* if cursor is on right half of a kanji, erase the kanji */
    if (! Insert) EraseKanji(0); /* if cursor on left half... */
  }

  if (Insert)
  {
    memmove(&CodeLine[CursorX+1],&CodeLine[CursorX],NumOfColumns-1-CursorX);
    memmove(&AttrLine[CursorX+1],&AttrLine[CursorX],NumOfColumns-1-CursorX);
    memmove(&AttrLine2[CursorX+1],&AttrLine2[CursorX],NumOfColumns-1-CursorX);
    memmove(&AttrLineFG[CursorX+1],&AttrLineFG[CursorX],NumOfColumns-1-CursorX);
    memmove(&AttrLineBG[CursorX+1],&AttrLineBG[CursorX],NumOfColumns-1-CursorX);
    CodeLine[CursorX] = b;
    AttrLine[CursorX] = Attr.Attr;
    AttrLine2[CursorX] = Attr.Attr2;
    AttrLineFG[CursorX] = Attr.Fore;
    AttrLineBG[CursorX] = Attr.Back;
    /* last char in current line is kanji first? */
    if ((AttrLine[NumOfColumns-1] & AttrKanji) != 0)
    {
      /* then delete it */
      CodeLine[NumOfColumns-1] = 0x20;
      AttrLine[NumOfColumns-1] = CurCharAttr.Attr;
      AttrLine2[NumOfColumns-1] = CurCharAttr.Attr2;
      AttrLineFG[NumOfColumns-1] = CurCharAttr.Fore;
      AttrLineBG[NumOfColumns-1] = CurCharAttr.Back;
    }
    /* begin - ishizaki */
    markURL(CursorX+1);
    markURL(CursorX);
    /* end - ishizaki */

    if (StrChangeCount==0) XStart = CursorX;
                      else XStart = StrChangeStart;
    StrChangeCount = 0;
    BuffUpdateRect(XStart,CursorY,NumOfColumns-1,CursorY);
  }
  else {
    CodeLine[CursorX] = b;
    AttrLine[CursorX] = Attr.Attr;
    AttrLine2[CursorX] = Attr.Attr2;
    AttrLineFG[CursorX] = Attr.Fore;
    AttrLineBG[CursorX] = Attr.Back;
    /* begin - ishizaki */
    markURL(CursorX);
    /* end - ishizaki */

    if (StrChangeCount==0)
      StrChangeStart = CursorX;
    StrChangeCount++;
  }
}

void BuffPutKanji(WORD w, TCharAttr Attr, BOOL Insert)
// Put a kanji character in the buffer at the current position
//   b: character
//   Attr: attributes
//   Insert: Insert flag
{
  int XStart;

  EraseKanji(1); /* if cursor is on right half of a kanji, erase the kanji */

  if (Insert)
  {
    memmove(&CodeLine[CursorX+2],&CodeLine[CursorX],NumOfColumns-2-CursorX);
    memmove(&AttrLine[CursorX+2],&AttrLine[CursorX],NumOfColumns-2-CursorX);
    memmove(&AttrLine2[CursorX+2],&AttrLine2[CursorX],NumOfColumns-2-CursorX);
    memmove(&AttrLineFG[CursorX+2],&AttrLineFG[CursorX],NumOfColumns-2-CursorX);
    memmove(&AttrLineBG[CursorX+2],&AttrLineBG[CursorX],NumOfColumns-2-CursorX);

    CodeLine[CursorX] = HIBYTE(w);
    AttrLine[CursorX] = Attr.Attr | AttrKanji; /* DBCS first byte */
    AttrLine2[CursorX] = Attr.Attr2;
    AttrLineFG[CursorX] = Attr.Fore;
    AttrLineBG[CursorX] = Attr.Back;
    if (CursorX < NumOfColumns-1)
    {
      CodeLine[CursorX+1] = LOBYTE(w);
      AttrLine[CursorX+1] = Attr.Attr;
      AttrLine2[CursorX+1] = Attr.Attr2;
      AttrLineFG[CursorX+1] = Attr.Fore;
      AttrLineBG[CursorX+1] = Attr.Back;
    }
    /* begin - ishizaki */
    markURL(CursorX);
    markURL(CursorX+1);
    /* end - ishizaki */

    /* last char in current line is kanji first? */
    if ((AttrLine[NumOfColumns-1] & AttrKanji) != 0)
    {
      /* then delete it */
      CodeLine[NumOfColumns-1] = 0x20;
      AttrLine[NumOfColumns-1] = CurCharAttr.Attr;
      AttrLine2[NumOfColumns-1] = CurCharAttr.Attr2;
      AttrLineFG[NumOfColumns-1] = CurCharAttr.Fore;
      AttrLineBG[NumOfColumns-1] = CurCharAttr.Back;
    }

    if (StrChangeCount==0) XStart = CursorX;
                      else XStart = StrChangeStart;
    StrChangeCount = 0;
    BuffUpdateRect(XStart,CursorY,NumOfColumns-1,CursorY);
  }
  else {
    CodeLine[CursorX] = HIBYTE(w);
    AttrLine[CursorX] = Attr.Attr | AttrKanji; /* DBCS first byte */
    AttrLine2[CursorX] = Attr.Attr2;
    AttrLineFG[CursorX] = Attr.Fore;
    AttrLineBG[CursorX] = Attr.Back;
    if (CursorX < NumOfColumns-1)
    {
      CodeLine[CursorX+1] = LOBYTE(w);
      AttrLine[CursorX+1] = Attr.Attr;
      AttrLine2[CursorX+1] = Attr.Attr2;
      AttrLineFG[CursorX+1] = Attr.Fore;
      AttrLineBG[CursorX+1] = Attr.Back;
    }
    /* begin - ishizaki */
    markURL(CursorX);
    markURL(CursorX+1);
    /* end - ishizaki */

    if (StrChangeCount==0)
      StrChangeStart = CursorX;
    StrChangeCount = StrChangeCount + 2;
  }
}

BOOL CheckSelect(int x, int y)
//  subroutine called by BuffUpdateRect
{
  LONG L, L1, L2;

  if (BoxSelect)
  {
    return (Selected &&
      ((SelectStart.x<=x) && (x<SelectEnd.x) ||
       (SelectEnd.x<=x) && (x<SelectStart.x)) &&
      ((SelectStart.y<=y) && (y<=SelectEnd.y) ||
       (SelectEnd.y<=y) && (y<=SelectStart.y)));
  }
  else {
    L = MAKELONG(x,y);
    L1 = MAKELONG(SelectStart.x,SelectStart.y);
    L2 = MAKELONG(SelectEnd.x,SelectEnd.y);

    return (Selected &&
      ((L1<=L) && (L<L2) || (L2<=L) && (L<L1)));
  }
}

void BuffUpdateRect
  (int XStart, int YStart, int XEnd, int YEnd)
// Display text in a rectangular region in the screen
//   XStart: x position of the upper-left corner (screen cordinate)
//   YStart: y position
//   XEnd: x position of the lower-right corner (last character)
//   YEnd: y position
{
  int i, j, count;
  int IStart, IEnd;
  int X, Y;
  LONG TmpPtr;
  TCharAttr CurAttr, TempAttr;
  BOOL CurSel, TempSel, Caret;

  if (XStart >= WinOrgX+WinWidth) return;
  if (YStart >= WinOrgY+WinHeight) return;
  if (XEnd < WinOrgX) return;
  if (YEnd < WinOrgY) return;

  if (XStart < WinOrgX) XStart = WinOrgX;
  if (YStart < WinOrgY) YStart = WinOrgY;
  if (XEnd >= WinOrgX+WinWidth) XEnd = WinOrgX+WinWidth-1;
  if (YEnd >= WinOrgY+WinHeight) YEnd = WinOrgY+WinHeight-1;

  TempAttr = DefCharAttr;
  TempSel = FALSE;

  Caret = IsCaretOn();
  if (Caret) CaretOff();

  DispSetupDC(DefCharAttr, TempSel);

  Y = (YStart-WinOrgY)*FontHeight;
  TmpPtr = GetLinePtr(PageStart+YStart);
  for (j = YStart+PageStart ; j <= YEnd+PageStart ; j++)
  {
    IStart = XStart;
    IEnd = XEnd;

    IStart = LeftHalfOfDBCS(TmpPtr,IStart);

    X = (IStart-WinOrgX)*FontWidth;

    i = IStart;
    do {
      CurAttr.Attr = AttrBuff[TmpPtr+i] & ~ AttrKanji;
      CurAttr.Attr2 = AttrBuff2[TmpPtr+i];
      CurAttr.Fore = AttrBuffFG[TmpPtr+i];
      CurAttr.Back = AttrBuffBG[TmpPtr+i];
      CurSel = CheckSelect(i,j);
      count = 1;
      while
        ( (i+count <= IEnd) &&
          (CurAttr.Attr == (AttrBuff[TmpPtr+i+count] & ~ AttrKanji)) &&
          (CurAttr.Attr2==AttrBuff2[TmpPtr+i+count]) &&
          (CurAttr.Fore==AttrBuffFG[TmpPtr+i+count]) &&
          (CurAttr.Back==AttrBuffBG[TmpPtr+i+count]) &&
          (CurSel==CheckSelect(i+count,j)) ||
          (i+count<NumOfColumns) &&
          ((AttrBuff[TmpPtr+i+count-1] & AttrKanji) != 0) )
        count++;

      if (TCharAttrCmp(CurAttr, TempAttr) != 0 || (CurSel != TempSel)) {
        DispSetupDC(CurAttr, CurSel);
        TempAttr = CurAttr;
        TempSel = CurSel;
      }
      DispStr(&CodeBuff[TmpPtr+i],count,Y, &X);
      i = i+count;
    }
    while (i<=IEnd);
    Y = Y + FontHeight;
    TmpPtr = NextLinePtr(TmpPtr);
  }
  if (Caret) CaretOn();
}

void UpdateStr()
// Display not-yet-displayed string
{
  int X, Y;
  TCharAttr TempAttr;

  if (StrChangeCount==0) return;
  X = StrChangeStart;
  Y = CursorY;
  if (! IsLineVisible(&X, &Y))
  {
    StrChangeCount = 0;
    return;
  }

  TempAttr.Attr = AttrLine[StrChangeStart];
  TempAttr.Attr2 = AttrLine2[StrChangeStart];
  TempAttr.Fore = AttrLineFG[StrChangeStart];
  TempAttr.Back = AttrLineBG[StrChangeStart];
  DispSetupDC(TempAttr, FALSE);
  DispStr(&CodeLine[StrChangeStart],StrChangeCount,Y, &X);
  StrChangeCount = 0;
}

#if 0
void UpdateStrUnicode(void)
// Display not-yet-displayed string
{
  int X, Y;
  TCharAttr TempAttr;

  if (StrChangeCount==0) return;
  X = StrChangeStart;
  Y = CursorY;
  if (! IsLineVisible(&X, &Y))
  {
    StrChangeCount = 0;
    return;
  }

  TempAttr.Attr = AttrLine[StrChangeStart];
  TempAttr.Attr2 = AttrLine2[StrChangeStart];
  TempAttr.Fore = AttrLineFG[StrChangeStart];
  TempAttr.Back = AttrLineBG[StrChangeStart];
  DispSetupDC(TempAttr, FALSE);
  DispStr(&CodeLine[StrChangeStart],StrChangeCount,Y, &X);
  StrChangeCount = 0;
}
#endif

void MoveCursor(int Xnew, int Ynew)
{
  UpdateStr();

  if (CursorY!=Ynew) NewLine(PageStart+Ynew);

  CursorX = Xnew;
  CursorY = Ynew;
  Wrap = FALSE;

  /* 最下行でだけ自動スクロールする*/
  if (ts.AutoScrollOnlyInBottomLine == 0 || WinOrgY == 0) {
    DispScrollToCursor(CursorX, CursorY);
  }
}

void MoveRight()
/* move cursor right, but dont update screen.
  this procedure must be called from DispChar&DispKanji only */
{
  CursorX++;
  /* 最下行でだけ自動スクロールする */
  if (ts.AutoScrollOnlyInBottomLine == 0 || WinOrgY == 0) {
    DispScrollToCursor(CursorX, CursorY);
  }
}

void BuffSetCaretWidth()
{
  BOOL DW;

  /* check whether cursor on a DBCS character */
  DW = (((BYTE)(AttrLine[CursorX]) & AttrKanji) != 0);
  DispSetCaretWidth(DW);
}

void ScrollUp1Line()
{
  int i;
  LONG SrcPtr, DestPtr;

  if ((CursorTop<=CursorY) && (CursorY<=CursorBottom))
  {
    UpdateStr();

    DestPtr = GetLinePtr(PageStart+CursorBottom);
    for (i = CursorBottom-1 ; i >= CursorTop ; i--)
    {
      SrcPtr = PrevLinePtr(DestPtr);
      memcpy(&(CodeBuff[DestPtr]),&(CodeBuff[SrcPtr]),NumOfColumns);
      memcpy(&(AttrBuff[DestPtr]),&(AttrBuff[SrcPtr]),NumOfColumns);
      memcpy(&(AttrBuff2[DestPtr]),&(AttrBuff2[SrcPtr]),NumOfColumns);
      memcpy(&(AttrBuffFG[DestPtr]),&(AttrBuffFG[SrcPtr]),NumOfColumns);
      memcpy(&(AttrBuffBG[DestPtr]),&(AttrBuffBG[SrcPtr]),NumOfColumns);
      DestPtr = SrcPtr;
    }
    memset(&(CodeBuff[SrcPtr]),0x20,NumOfColumns);
    memset(&(AttrBuff[SrcPtr]),CurCharAttr.Attr,NumOfColumns);
    memset(&(AttrBuff2[SrcPtr]),CurCharAttr.Attr2,NumOfColumns);
    memset(&(AttrBuffFG[SrcPtr]),CurCharAttr.Fore,NumOfColumns);
    memset(&(AttrBuffBG[SrcPtr]),CurCharAttr.Back,NumOfColumns);

    DispScrollNLines(CursorTop,CursorBottom,-1);
  }
}

void BuffScrollNLines(int n)
{
  int i;
  LONG SrcPtr, DestPtr;

  if (n<1) return;
  UpdateStr();

  if ((CursorTop == 0) && (CursorBottom == NumOfLines-1))
  {
    WinOrgY = WinOrgY-n;
    /* 最下行でだけ自動スクロールする */
        if (ts.AutoScrollOnlyInBottomLine != 0 && NewOrgY != 0) {
                NewOrgY = WinOrgY;
        }
    BuffScroll(n,CursorBottom);
    DispCountScroll(n);
  }
  else if ((CursorTop==0) && (CursorY<=CursorBottom))
  {
    BuffScroll(n,CursorBottom);
    DispScrollNLines(WinOrgY,CursorBottom,n);
  }
  else if ((CursorTop<=CursorY) && (CursorY<=CursorBottom))
  {
    DestPtr = GetLinePtr(PageStart+CursorTop);
    if (n<CursorBottom-CursorTop+1)
    {
      SrcPtr = GetLinePtr(PageStart+CursorTop+n);
      for (i = CursorTop+n ; i<=CursorBottom ; i++)
      {
        memmove(&(CodeBuff[DestPtr]),&(CodeBuff[SrcPtr]),NumOfColumns);
        memmove(&(AttrBuff[DestPtr]),&(AttrBuff[SrcPtr]),NumOfColumns);
        memmove(&(AttrBuff2[DestPtr]),&(AttrBuff2[SrcPtr]),NumOfColumns);
        memmove(&(AttrBuffFG[DestPtr]),&(AttrBuffFG[SrcPtr]),NumOfColumns);
        memmove(&(AttrBuffBG[DestPtr]),&(AttrBuffBG[SrcPtr]),NumOfColumns);
        SrcPtr = NextLinePtr(SrcPtr);
        DestPtr = NextLinePtr(DestPtr);
      }
    }
    else
      n = CursorBottom-CursorTop+1;
    for (i = CursorBottom+1-n ; i<=CursorBottom; i++)
    {
      memset(&(CodeBuff[DestPtr]),0x20,NumOfColumns);
      memset(&(AttrBuff[DestPtr]),CurCharAttr.Attr,NumOfColumns);
      memset(&(AttrBuff2[DestPtr]),CurCharAttr.Attr2,NumOfColumns);
      memset(&(AttrBuffFG[DestPtr]),CurCharAttr.Fore,NumOfColumns);
      memset(&(AttrBuffBG[DestPtr]),CurCharAttr.Back,NumOfColumns);
      DestPtr = NextLinePtr(DestPtr);
    }
    DispScrollNLines(CursorTop,CursorBottom,n);
  }
}

void BuffRegionScrollUpNLines(int n) {
  int i;
  LONG SrcPtr, DestPtr;

  if (n<1) return;
  UpdateStr();

  if (n > 0) {
    if ((CursorTop == 0) && (CursorBottom == NumOfLines-1)) {
      WinOrgY = WinOrgY-n;
      BuffScroll(n,CursorBottom);
      DispCountScroll(n);
    }
    else if (CursorTop==0) {
      BuffScroll(n,CursorBottom);
      DispScrollNLines(WinOrgY,CursorBottom,n);
    }
    else {
      DestPtr = GetLinePtr(PageStart+CursorTop);
      if (n<CursorBottom-CursorTop+1) {
        SrcPtr = GetLinePtr(PageStart+CursorTop+n);
        for (i = CursorTop+n ; i<=CursorBottom ; i++) {
          memmove(&(CodeBuff[DestPtr]),&(CodeBuff[SrcPtr]),NumOfColumns);
          memmove(&(AttrBuff[DestPtr]),&(AttrBuff[SrcPtr]),NumOfColumns);
          memmove(&(AttrBuff2[DestPtr]),&(AttrBuff2[SrcPtr]),NumOfColumns);
          memmove(&(AttrBuffFG[DestPtr]),&(AttrBuffFG[SrcPtr]),NumOfColumns);
          memmove(&(AttrBuffBG[DestPtr]),&(AttrBuffBG[SrcPtr]),NumOfColumns);
          SrcPtr = NextLinePtr(SrcPtr);
          DestPtr = NextLinePtr(DestPtr);
        }
      }
      else
        n = CursorBottom-CursorTop+1;
      for (i = CursorBottom+1-n ; i<=CursorBottom; i++) {
        memset(&(CodeBuff[DestPtr]),0x20,NumOfColumns);
        memset(&(AttrBuff[DestPtr]),CurCharAttr.Attr,NumOfColumns);
        memset(&(AttrBuff2[DestPtr]),CurCharAttr.Attr2,NumOfColumns);
        memset(&(AttrBuffFG[DestPtr]),CurCharAttr.Fore,NumOfColumns);
        memset(&(AttrBuffBG[DestPtr]),CurCharAttr.Back,NumOfColumns);
        DestPtr = NextLinePtr(DestPtr);
      }
      DispScrollNLines(CursorTop,CursorBottom,n);
    }
  }
}

void BuffRegionScrollDownNLines(int n) {
  int i;
  LONG SrcPtr, DestPtr;

  if (n<1) {
    return;
  }
  UpdateStr();

  DestPtr = GetLinePtr(PageStart+CursorBottom);
  if (n < CursorBottom-CursorTop+1) {
    SrcPtr = GetLinePtr(PageStart+CursorBottom-n);
    for (i=CursorBottom-n ; i>=CursorTop ; i--) {
      memmove(&(CodeBuff[DestPtr]),&(CodeBuff[SrcPtr]),NumOfColumns);
      memmove(&(AttrBuff[DestPtr]),&(AttrBuff[SrcPtr]),NumOfColumns);
      memmove(&(AttrBuff2[DestPtr]),&(AttrBuff2[SrcPtr]),NumOfColumns);
      memmove(&(AttrBuffFG[DestPtr]),&(AttrBuffFG[SrcPtr]),NumOfColumns);
      memmove(&(AttrBuffBG[DestPtr]),&(AttrBuffBG[SrcPtr]),NumOfColumns);
      SrcPtr = PrevLinePtr(SrcPtr);
      DestPtr = PrevLinePtr(DestPtr);
    }
  }
  else {
    n = CursorBottom - CursorTop + 1;
  }
  for (i = CursorTop+n-1; i>=CursorTop; i--) {
    memset(&(CodeBuff[DestPtr]),0x20,NumOfColumns);
    memset(&(AttrBuff[DestPtr]),CurCharAttr.Attr,NumOfColumns);
    memset(&(AttrBuff2[DestPtr]),CurCharAttr.Attr2,NumOfColumns);
    memset(&(AttrBuffFG[DestPtr]),CurCharAttr.Fore,NumOfColumns);
    memset(&(AttrBuffBG[DestPtr]),CurCharAttr.Back,NumOfColumns);
    DestPtr = PrevLinePtr(DestPtr);
  }

  DispScrollNLines(CursorTop,CursorBottom,-n);
}

void BuffClearScreen()
{ // clear screen
  if ((StatusLine>0) && (CursorY==NumOfLines-1))
    BuffScrollNLines(1); /* clear status line */
  else { /* clear main screen */
    UpdateStr();
    BuffScroll(NumOfLines-StatusLine,NumOfLines-1-StatusLine);
    DispScrollNLines(WinOrgY,NumOfLines-1-StatusLine,NumOfLines-StatusLine);
  }
}

void BuffUpdateScroll()
// Updates scrolling
{
  UpdateStr();
  DispUpdateScroll();
}

void CursorUpWithScroll()
{
  if ((0<CursorY) && (CursorY<CursorTop) ||
      (CursorTop<CursorY))
    MoveCursor(CursorX,CursorY-1);
  else if (CursorY==CursorTop)
    ScrollUp1Line();
}

// called by BuffDblClk
//   check if a character is the word delimiter
BOOL IsDelimiter(LONG Line, int CharPtr)
{
  if ((AttrBuff[Line+CharPtr] & AttrKanji) !=0)
    return (ts.DelimDBCS!=0);
  return
    (strchr(ts.DelimList,CodeBuff[Line+CharPtr])!=NULL);
}

void GetMinMax(int i1, int i2, int i3,
               int *min, int *max)
{
  if (i1<i2)
  {
    *min = i1;
    *max = i2;
  }
  else {
    *min = i2;
    *max = i1;
  }
  if (i3<*min)
    *min = i3;
  if (i3>*max)
    *max = i3;
}

/* start - ishizaki */
static void invokeBrowser(LONG ptr)
{
#ifdef URL_EMPHASIS
    LONG i, start, end;
    char url[1024];
        char *uptr, ch;

    start = ptr;
    while (AttrBuff[start] & AttrURL) start--;
    start++;

    end = ptr;
    while (AttrBuff[end] & AttrURL) end++;
    end--;
 
    if (start + 1024 <= end) end = start + 1023;
        uptr = url;
    for (i = 0; i < end - start + 1; i++) {
                ch = CodeBuff[start + i];
                if ((start + i) % NumOfColumns == NumOfColumns - 1 
                        && ch == '\\') {
                        // Emacs対応。行末に \ が来ている場合は、次の行に続くという意味で emacs が
                        // 自動で挿入する文字なので、URLには含めないようにする。
                        // (2007.8.7 yutaka)

                } else {
                        *uptr++ = ch;
                }
    }
        *uptr = '\0';
    ShellExecute(NULL, NULL, url, NULL, NULL,SW_SHOWNORMAL);
#endif
}
/* end - ishizaki */

void ChangeSelectRegion()
{
  POINT TempStart, TempEnd;
  int j, IStart, IEnd;
  BOOL Caret;

  if ((SelectEndOld.x==SelectEnd.x) &&
      (SelectEndOld.y==SelectEnd.y)) return;

  if (BoxSelect)
  {
    GetMinMax(SelectStart.x,SelectEndOld.x,SelectEnd.x,
              (int *)&TempStart.x,(int *)&TempEnd.x);
    GetMinMax(SelectStart.y,SelectEndOld.y,SelectEnd.y,
              (int *)&TempStart.y,(int *)&TempEnd.y);
    TempEnd.x--;
    Caret = IsCaretOn();
    if (Caret) CaretOff();
    DispInitDC();
    BuffUpdateRect(TempStart.x,TempStart.y-PageStart,
                   TempEnd.x,TempEnd.y-PageStart);
    DispReleaseDC();
    if (Caret) CaretOn();
    SelectEndOld = SelectEnd;
    return;
  }

  if ((SelectEndOld.y < SelectEnd.y) ||
      (SelectEndOld.y==SelectEnd.y) &&
      (SelectEndOld.x<=SelectEnd.x))
  {
    TempStart = SelectEndOld;
    TempEnd.x = SelectEnd.x-1;
    TempEnd.y = SelectEnd.y;
  }
  else {
    TempStart = SelectEnd;
    TempEnd.x = SelectEndOld.x-1;
    TempEnd.y = SelectEndOld.y;
  }
  if (TempEnd.x < 0)
  {
    TempEnd.x = NumOfColumns - 1;
    TempEnd.y--;
  }

  Caret = IsCaretOn();
  if (Caret) CaretOff();
  for (j = TempStart.y ; j <= TempEnd.y ; j++)
  {
    IStart = 0;
    IEnd = NumOfColumns-1;
    if (j==TempStart.y) IStart = TempStart.x;
    if (j==TempEnd.y) IEnd = TempEnd.x;

    if ((IEnd>=IStart) && (j >= PageStart+WinOrgY) &&
        (j < PageStart+WinOrgY+WinHeight))
    {
      DispInitDC();
      BuffUpdateRect(IStart,j-PageStart,IEnd,j-PageStart);
      DispReleaseDC();
    }
  }
  if (Caret) CaretOn();

  SelectEndOld = SelectEnd;
}

BOOL BuffUrlDblClk(int Xw, int Yw)
{
  int X, Y;
  LONG TmpPtr;
  BOOL url_invoked = FALSE;

  if (! ts.EnableClickableUrl) {
    return FALSE;
  }

  CaretOff();

  DispConvWinToScreen(Xw,Yw,&X,&Y,NULL);
  Y = Y + PageStart;
  if ((Y<0) || (Y>=BuffEnd)) return 0;
  if (X<0) X = 0;
  if (X>=NumOfColumns) X = NumOfColumns-1;

  if ((Y>=0) && (Y<BuffEnd)) {
    LockBuffer();
    TmpPtr = GetLinePtr(Y);
    /* start - ishizaki */
    if (AttrBuff[TmpPtr+X] & AttrURL) {
      BoxSelect = FALSE;
      SelectEnd = SelectStart;
      ChangeSelectRegion();

      url_invoked = TRUE;
      invokeBrowser(TmpPtr+X);

      SelectStart.x = 0;
      SelectStart.y = 0;
      SelectEnd.x = 0;
      SelectEnd.y = 0;
      SelectEndOld.x = 0;
      SelectEndOld.y = 0;
      Selected = FALSE;
    }
    UnlockBuffer();
  }
  return url_invoked;
}

void BuffDblClk(int Xw, int Yw)
//  Select a word at (Xw, Yw) by mouse double click
//    Xw: horizontal position in window coordinate (pixels)
//    Yw: vertical
{
  int X, Y, YStart, YEnd;
  int IStart, IEnd, i;
  LONG TmpPtr;
  BYTE b;
  BOOL DBCS;

  CaretOff();

  DispConvWinToScreen(Xw,Yw,&X,&Y,NULL);
  Y = Y + PageStart;
  if ((Y<0) || (Y>=BuffEnd)) return;
  if (X<0) X = 0;
  if (X>=NumOfColumns) X = NumOfColumns-1;

  BoxSelect = FALSE;
  LockBuffer();
  SelectEnd = SelectStart;
  ChangeSelectRegion();

  if ((Y>=0) && (Y<BuffEnd))
  {
    TmpPtr = GetLinePtr(Y);

    IStart = X;
    IStart = LeftHalfOfDBCS(TmpPtr,IStart);
    IEnd = IStart;
    YStart = YEnd = Y;

    if (IsDelimiter(TmpPtr,IStart))
    {
      b = CodeBuff[TmpPtr+IStart];
      DBCS = (AttrBuff[TmpPtr+IStart] & AttrKanji) != 0;
      while ((b==CodeBuff[TmpPtr+IStart]) ||
             DBCS &&
                         ((AttrBuff[TmpPtr+IStart] & AttrKanji)!=0)) {
        MoveCharPtr(TmpPtr,&IStart,-1); // move left
        if (ts.EnableContinuedLineCopy) {
          if (IStart<=0) {
            // 左端の場合
            if (YStart>0 && AttrBuff[TmpPtr] & AttrLineContinued) {
              // 前の行に移動する
              YStart--;
              TmpPtr = GetLinePtr(YStart);
              IStart = NumOfColumns;
                        }
                        else {
              break;
                        }
                  }
                }
                else {
          if (IStart<=0) {
            // 左端の場合は終わり
            break;
                  }
                }
          }
      if ((b!=CodeBuff[TmpPtr+IStart]) &&
          ! (DBCS &&
          ((AttrBuff[TmpPtr+IStart] & AttrKanji)!=0))) {
        // 最終位置が Delimiter でない場合にはひとつ右にずらす
        if (ts.EnableContinuedLineCopy && IStart == NumOfColumns-1) {
          // 右端の場合には次の行へ移動する
          YStart++;
          TmpPtr = GetLinePtr(YStart);
          IStart = 0;
        }
        else {
          MoveCharPtr(TmpPtr,&IStart,1);
        }
          }

      // 行が移動しているかもしれないので、クリックした行を取り直す
      TmpPtr = GetLinePtr(YEnd);
      i = 1;
      while (((b==CodeBuff[TmpPtr+IEnd]) ||
              DBCS &&
              ((AttrBuff[TmpPtr+IEnd] & AttrKanji)!=0))) {
        i = MoveCharPtr(TmpPtr,&IEnd,1); // move right
        if (ts.EnableContinuedLineCopy) {
          if (i==0) {
            // 右端の場合
            if (YEnd<BuffEnd &&
                AttrBuff[TmpPtr+IEnd+1+DBCS] & AttrLineContinued) {
              // 次の行に移動する
              YEnd++;
              TmpPtr = GetLinePtr(YEnd);
              IEnd = 0;
            }
            else {
              break;
            }
          }
        }
        else {
          if (i==0) {
            // 右端の場合は終わり
            break;
          }
        }
          }
    }
    else {
      while (! IsDelimiter(TmpPtr,IStart)) {
        MoveCharPtr(TmpPtr,&IStart,-1); // move left
        if (ts.EnableContinuedLineCopy) {
          if (IStart<=0) {
            // 左端の場合
            if (YStart>0 && AttrBuff[TmpPtr] & AttrLineContinued) {
              // 前の行に移動する
              YStart--;
              TmpPtr = GetLinePtr(YStart);
              IStart = NumOfColumns;
            }
            else {
              break;
            }
          }
        }
        else {
          if (IStart<=0) {
            // 左端の場合は終わり
            break;
          }
        }
      }
      if (IsDelimiter(TmpPtr,IStart)) {
        // 最終位置が Delimiter の場合にはひとつ右にずらす
        if (ts.EnableContinuedLineCopy && IStart == NumOfColumns-1) {
          // 右端の場合には次の行へ移動する
          YStart++;
          TmpPtr = GetLinePtr(YStart);
          IStart = 0;
        }
        else {
          MoveCharPtr(TmpPtr,&IStart,1);
        }
      }
      
      // 行が移動しているかもしれないので、クリックした行を取り直す
      TmpPtr = GetLinePtr(YEnd);
      i = 1;
      while (! IsDelimiter(TmpPtr,IEnd)) {
        i = MoveCharPtr(TmpPtr,&IEnd,1); // move right
        if (ts.EnableContinuedLineCopy) {
          if (i==0) {
            // 右端の場合
            if (YEnd<BuffEnd && AttrBuff[TmpPtr+IEnd+1] & AttrLineContinued) {
              // 次の行に移動する
              YEnd++;
              TmpPtr = GetLinePtr(YEnd);
              IEnd = 0;
            }
            else {
              break;
            }
          }
        }
        else {
          if (i==0) {
            // 右端の場合は終わり
            break;
          }
        }
      }
    }
    if (ts.EnableContinuedLineCopy) {
      if (IEnd == 0) {
        // 左端の場合には前の行へ移動する
        YEnd--;
        IEnd = NumOfColumns;
      }
      else if (i==0) {
        IEnd = NumOfColumns;
      }
    }
    else {
      if (i==0)
        IEnd = NumOfColumns;
    }

    SelectStart.x = IStart;
    SelectStart.y = YStart;
    SelectEnd.x = IEnd;
    SelectEnd.y = YEnd;
    SelectEndOld = SelectStart;
    DblClkStart = SelectStart;
    DblClkEnd = SelectEnd;
    Selected = TRUE;
    ChangeSelectRegion();
  }
  UnlockBuffer();
  return;
}

void BuffTplClk(int Yw)
//  Select a line at Yw by mouse tripple click
//    Yw: vertical clicked position
//                      in window coordinate (pixels)
{
  int Y;

  CaretOff();

  DispConvWinToScreen(0,Yw,NULL,&Y,NULL);
  Y = Y + PageStart;
  if ((Y<0) || (Y>=BuffEnd)) return;

  LockBuffer();
  SelectEnd = SelectStart;
  ChangeSelectRegion();
  SelectStart.x = 0;
  SelectStart.y = Y;
  SelectEnd.x = NumOfColumns;
  SelectEnd.y = Y;
  SelectEndOld = SelectStart;
  DblClkStart = SelectStart;
  DblClkEnd = SelectEnd;
  Selected = TRUE;
  ChangeSelectRegion();
  UnlockBuffer();
}


// The block of the text between old and new cursor positions is being selected.
// This function enables to select several pages of output from Tera Term window.
// add (2005.5.15 yutaka)
void BuffSeveralPagesSelect(int Xw, int Yw)
//  Start text selection by mouse button down
//    Xw: horizontal position in window coordinate (pixels)
//    Yw: vertical
{
        int X, Y;
        BOOL Right;

        DispConvWinToScreen(Xw,Yw, &X,&Y,&Right);
        Y = Y + PageStart;
        if ((Y<0) || (Y>=BuffEnd)) return;
        if (X<0) X = 0;
        if (X>=NumOfColumns) X = NumOfColumns-1;

        SelectEnd.x = X;
        SelectEnd.y = Y;
        //BoxSelect = FALSE; // box selecting disabled
        SeveralPageSelect = TRUE;
}

void BuffStartSelect(int Xw, int Yw, BOOL Box)
//  Start text selection by mouse button down
//    Xw: horizontal position in window coordinate (pixels)
//    Yw: vertical
//    Box: Box selection if TRUE
{
  int X, Y;
  BOOL Right;
  LONG TmpPtr;

  DispConvWinToScreen(Xw,Yw, &X,&Y,&Right);
  Y = Y + PageStart;
  if ((Y<0) || (Y>=BuffEnd)) return;
  if (X<0) X = 0;
  if (X>=NumOfColumns) X = NumOfColumns-1;

  SelectEndOld = SelectEnd;
  SelectEnd = SelectStart;

  LockBuffer();
  ChangeSelectRegion();
  UnlockBuffer();

  SelectStart.x = X;
  SelectStart.y = Y;
  if (SelectStart.x<0) SelectStart.x = 0;
  if (SelectStart.x > NumOfColumns)
    SelectStart.x = NumOfColumns;
  if (SelectStart.y < 0) SelectStart.y = 0;
  if (SelectStart.y >= BuffEnd)
    SelectStart.y = BuffEnd - 1;

  TmpPtr = GetLinePtr(SelectStart.y);
  // check if the cursor is on the right half of a character
  if ((SelectStart.x>0) &&
      ((AttrBuff[TmpPtr+SelectStart.x-1] & AttrKanji) != 0) ||
      ((AttrBuff[TmpPtr+SelectStart.x] & AttrKanji) == 0) &&
       Right) SelectStart.x++;

  SelectEnd = SelectStart;
  SelectEndOld = SelectEnd;
  CaretOff();
  Selected = TRUE;
  BoxSelect = Box;
}

void BuffChangeSelect(int Xw, int Yw, int NClick)
//  Change selection region by mouse move
//    Xw: horizontal position of the mouse cursor
//                      in window coordinate
//    Yw: vertical
{
        int X, Y;
        BOOL Right;
        LONG TmpPtr;
        int i;
        BYTE b;
        BOOL DBCS;

        DispConvWinToScreen(Xw,Yw,&X,&Y,&Right);
        Y = Y + PageStart;

        if (X<0) X = 0;
        if (X > NumOfColumns)
                X = NumOfColumns;
        if (Y < 0) Y = 0;
        if (Y >= BuffEnd)
                Y = BuffEnd - 1;

        TmpPtr = GetLinePtr(Y);
        LockBuffer();
        // check if the cursor is on the right half of a character
        if ((X>0) &&
                ((AttrBuff[TmpPtr+X-1] & AttrKanji) != 0) ||
                (X<NumOfColumns) &&
                ((AttrBuff[TmpPtr+X] & AttrKanji) == 0) &&
                Right) X++;

        if (X > NumOfColumns)
                X = NumOfColumns;

        // check URL string on mouse over(2005/4/3 yutaka)
        if (NClick == 0) {
                extern void SetMouseCursor(char *cursor);

                if ((AttrBuff[TmpPtr+X] & AttrURL)) {
                        SetMouseCursor("HAND");

                } else {
                        SetMouseCursor(ts.MouseCursorName);
                        //SetCursor(LoadCursor(NULL, IDC_IBEAM));

                }

                UnlockBuffer();
                return;
        }

#if 0
        /* start - ishizaki */
        if (ts.EnableClickableUrl && (NClick == 2) && (AttrBuff[TmpPtr+X] & AttrURL)) {
                invokeBrowser(TmpPtr+X);

                SelectStart.x = 0;
                SelectStart.y = 0;
                SelectEnd.x = 0;
                SelectEnd.y = 0;
                SelectEndOld.x = 0;
                SelectEndOld.y = 0;
                Selected = FALSE;
                goto end;
        }
        /* end - ishizaki */
#endif

        SelectEnd.x = X;
        SelectEnd.y = Y;

        if (NClick==2) // drag after double click
        {
                if ((SelectEnd.y>SelectStart.y) ||
                        (SelectEnd.y==SelectStart.y) &&
                        (SelectEnd.x>=SelectStart.x))
                {
                        if (SelectStart.x==DblClkEnd.x)
                        {
                                SelectEnd = DblClkStart;
                                ChangeSelectRegion();
                                SelectStart = DblClkStart;
                                SelectEnd.x = X;
                                SelectEnd.y = Y;
                        }
                        MoveCharPtr(TmpPtr,&X,-1);
                        if (X<SelectStart.x) X = SelectStart.x;

                        i = 1;
                        if (IsDelimiter(TmpPtr,X))
                        {
                                b = CodeBuff[TmpPtr+X];
                                DBCS = (AttrBuff[TmpPtr+X] & AttrKanji) != 0;
                                while ((i!=0) &&
                                        ((b==CodeBuff[TmpPtr+SelectEnd.x]) ||
                                        DBCS &&
                                        ((AttrBuff[TmpPtr+SelectEnd.x] & AttrKanji)!=0)))
                                        i = MoveCharPtr(TmpPtr,(int *)&SelectEnd.x,1); // move right