TScroller Class Reference

#include <tscroll.h>

Collaboration diagram for TScroller:

Public Member Functions
void	init (stripfunc *s)
void	update (const char *pszBegin, const char *pszEnd)
void	ScrollBack ()
	TScroller (TMouse &M, int size=20000)
	~TScroller ()

Private Attributes
char *	pcScrollData
long	iScrollSize
long	iScrollEnd
int	iPastEnd
int	iDisplay
stripfunc *	strip
TMouse &	Mouse

Detailed Description

Definition at line 8 of file tscroll.h.

Constructor & Destructor Documentation

TScroller()

TScroller::TScroller	(	TMouse &	M,
		int	size = 20000
	)

Definition at line 52 of file tscroll.cpp.

                                        : Mouse(M) {
    iScrollSize = size;
    pcScrollData = new char[iScrollSize];
    iScrollEnd = 0;
    iPastEnd = 0;
    memset(pcScrollData, ' ', iScrollSize);
 
    if(stricmp(ini.get_scroll_mode(), "hex") == 0) iDisplay = HEX;
    else if(stricmp(ini.get_scroll_mode(), "dump") == 0) iDisplay = DUMP;
    else if(stricmp(ini.get_scroll_mode(), "dumpb") == 0) iDisplay = DUMPB;
    else if(stricmp(ini.get_scroll_mode(), "text") == 0) iDisplay = TEXTB;
    else iDisplay = DUMP;
 
    strip = &DummyStripBuffer;
}

~TScroller()

TScroller::~TScroller

(

)

Definition at line 68 of file tscroll.cpp.

                      {
    delete[] pcScrollData;
}

Member Function Documentation

init()

void TScroller::init

(

stripfunc *

s

)

Definition at line 72 of file tscroll.cpp.

                                 {
    strip = s;
}

Referenced by TANSIParser::TANSIParser().

ScrollBack()

void TScroller::ScrollBack

(

)

Definition at line 163 of file tscroll.cpp.

                          {
    char p;
    int r,c;
 
    // define colors (Paul Brannan 7/5/98)
    int normal = (ini.get_scroll_bg() << 4) | ini.get_scroll_fg();
    // int inverse = (ini.get_scroll_fg() << 4) | ini.get_scroll_bg();
    int status = (ini.get_status_bg() << 4) | ini.get_status_fg();
 
    CHAR_INFO* chiBuffer;
    chiBuffer = newBuffer();
    saveScreen(chiBuffer);
 
    HANDLE hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
    CONSOLE_SCREEN_BUFFER_INFO ConsoleInfo;
    GetConsoleScreenBufferInfo(hStdout, &ConsoleInfo);
 
    // Update iScrollBegin -- necessary in case the buffer isn't full yet
    long iScrollBegin, iScrollLast;
    if(iPastEnd == 0) {
        iScrollBegin = 0;
        iScrollLast = iScrollEnd - 1;
    } else {
        iScrollBegin = iScrollEnd;
        iScrollLast = iScrollSize - 1;
    }
 
    // Create buffer with ANSI codes stripped
    // Fixed this to work properly with a circular buffer (PB 12/4/98)
    char *stripped = new char[iScrollSize];
    memcpy(stripped, pcScrollData + iScrollBegin, iScrollSize -
        iScrollBegin);
    if(iScrollBegin != 0) memcpy(stripped + (iScrollSize - iScrollBegin),
        pcScrollData, iScrollBegin - 1);
    int strippedlines = (*strip)(stripped, stripped + iScrollLast,
        CON_COLS);
 
    // Calculate the last line of the scroll buffer (Paul Brannan 12/4/98)
    int maxlines = setmaxlines(iDisplay, iScrollLast + 1, strippedlines,
        CON_COLS);
 
    // init scroll position
    int current = maxlines - CON_HEIGHT + 1;
    if(current < 0) current = 0;
 
    // paint border and info
    // paint last two lines black on white
    char * szStatusLine;
    szStatusLine = new char[CON_WIDTH+2];
    setstatusline(szStatusLine, CON_COLS, iDisplay);
    WriteConsoleOutputCharAndAttribute(hStdout, szStatusLine, status,
        CON_LEFT, CON_BOTTOM);
 
    // loop while not done
    BOOL done = FALSE;
    while (!done){
        switch (iDisplay){
        case HEX:
            memset(szStatusLine, ' ', CON_COLS);
            szStatusLine[8] = ':';
            szStatusLine[34] = '-';
            for (r = 0; r < CON_HEIGHT; r++) {
                hexify((r + current) * 16, &szStatusLine[2], 6);
                for (c = 0; c < 16; c++){
                    if (c+(16*(r+current)) >= iScrollLast)
                        p = 0;
                    else
                        p = pcScrollData[(c+16*(r+current) + iScrollBegin) %
                            iScrollSize];
                    hexify((char)p, &szStatusLine[11 + 3*c], 2);
                    if (!iscntrl(p)) {
                        szStatusLine[60 + c] = (char)p;
                    } else {
                        szStatusLine[60 + c] = '.';
                    }
                }
                for(int j = 0; j < 16; j++) {
                }
                szStatusLine[CON_COLS] = '\0';
                WriteConsoleOutputCharAndAttribute(hStdout, szStatusLine,
                    normal, CON_LEFT, r+CON_TOP);
            }
            break;
        case DUMP:
            for (r = 0; r < CON_HEIGHT; r++) {
                for (c = 0; c <= CON_WIDTH; c++) {
                    if (c+((CON_COLS)*(r+current)) >= iScrollLast) p = ' ';
                    else p = pcScrollData[(c+((CON_COLS)*(r+current))
                        + iScrollBegin) % iScrollSize];
                    if (!iscntrl(p))
                        szStatusLine[c] = p;
                    else
                        szStatusLine[c] = '.';
                }
                szStatusLine[c] = '\0';
                WriteConsoleOutputCharAndAttribute(hStdout, szStatusLine,
                    normal, CON_LEFT, r+CON_TOP);
            }
            break;
        case DUMPB:
            for (r = 0; r < CON_HEIGHT; r++) {
                for (c = 0; c <= CON_WIDTH; c++) {
                    if (c+((CON_COLS)*(r+current)) >= iScrollLast) p = ' ';
                    else p = pcScrollData[  (c+((CON_COLS)*(r+current))
                        + iScrollBegin) % iScrollSize];
                    if (p != 0)
                        szStatusLine[c] = p;
                    else
                        szStatusLine[c] = ' ';
                }
                szStatusLine[c] = '\0';
                WriteConsoleOutputCharAndAttribute(hStdout, szStatusLine,
                    normal, CON_LEFT, r+CON_TOP);
            }
            break;
        case TEXTB: {
            int ch, lines, x;
            // Find the starting position
            for(ch = 0, lines = 0, x = 1; ch < iScrollSize &&
                lines < current; ch++, x++) {
 
                if(stripped[ch] == '\n') lines++;
                if(stripped[ch] == '\r') x = 1;
            }
 
            for (r = 0; r < CON_HEIGHT; r++) {
                memset(szStatusLine, ' ', CON_COLS);
                for(c = 0; c <= CON_WIDTH; c++) {
                    done = FALSE;
                    if (ch >= iScrollSize) p = ' ';
                    else p = stripped[ch];
                    switch(p) {
                    case 10: done = TRUE; break;
                    case 13: c = 0; break;
                    default: szStatusLine[c] = p;
                    }
                    ch++;
                    if(done) break;
                }
                szStatusLine[CON_COLS] = '\0';
                WriteConsoleOutputCharAndAttribute(hStdout, szStatusLine,
                    normal, CON_LEFT, r+CON_TOP);
            }
                    }
            break;
        }
 
        setstatusline(szStatusLine, CON_COLS, iDisplay);
        WriteConsoleOutputCharAndAttribute(hStdout, szStatusLine, status,
            CON_LEFT, CON_BOTTOM);
 
        // paint scroll back data
        // get key input
        switch(scrollkeys()){
        case VK_ESCAPE:
            done = TRUE;
            break;
        case VK_PRIOR:
            if ( current > CON_HEIGHT)
                current-= CON_HEIGHT;
            else
                current = 0;
            break;
        case VK_NEXT:
            if ( current < maxlines - 2*CON_HEIGHT + 2)
                current += CON_HEIGHT;
            else
                current = maxlines - CON_HEIGHT + 1;
            break;
        case VK_DOWN:
            if (current <= maxlines - CON_HEIGHT) current++;
            break;
        case VK_UP:
            if ( current > 0) current--;
            break;
        case VK_TAB:
            iDisplay = (iDisplay+1)%4;
            maxlines = setmaxlines(iDisplay, iScrollLast + 1, strippedlines,
                CON_COLS);
            if(current > maxlines) current = maxlines - 1;
            if(current < 0) current = 0;
            break;
        case VK_END:
            current = maxlines - CON_HEIGHT + 1;
            if(current < 0) current = 0;
            break;
        case VK_HOME:
            current = 0;
            break;
        case SC_MOUSE:
            Mouse.scrollMouse();
            break;
        }
    }
 
    // Clean up
    restoreScreen(chiBuffer);
    delete[] szStatusLine;
    delete[] chiBuffer;
    delete[] stripped;
}

Referenced by Telnet::Resume().

update()

void TScroller::update	(	const char *	pszBegin,
		const char *	pszEnd
	)

Definition at line 78 of file tscroll.cpp.

                                                               {
    if ((iScrollEnd)+(pszTail-pszHead) < iScrollSize) {
        memcpy(&pcScrollData[iScrollEnd], pszHead, pszTail-pszHead);
    } else if (pszTail-pszHead > iScrollSize) {
        memcpy(pcScrollData, pszTail-iScrollSize, iScrollSize);
        iScrollEnd = 0;
    } else {
        memcpy(&pcScrollData[iScrollEnd], pszHead, iScrollSize-iScrollEnd);
        memcpy(&pcScrollData[0], pszHead + (iScrollSize-iScrollEnd),
            pszTail-pszHead-(iScrollSize-iScrollEnd));
    }
 
    // This could probably be optimized better, but it's probably not worth it
    int temp = iScrollEnd;
    iScrollEnd = ((iScrollEnd)+(pszTail-pszHead))%iScrollSize;
    if(iScrollEnd < temp) iPastEnd = 1;
}

Referenced by TANSIParser::ParseBuffer().

Member Data Documentation

iDisplay

int TScroller::iDisplay

private

Definition at line 14 of file tscroll.h.

Referenced by ScrollBack(), and TScroller().

iPastEnd

int TScroller::iPastEnd

private

Definition at line 13 of file tscroll.h.

Referenced by ScrollBack(), TScroller(), and update().

iScrollEnd

long TScroller::iScrollEnd

private

Definition at line 12 of file tscroll.h.

Referenced by ScrollBack(), TScroller(), and update().

iScrollSize

long TScroller::iScrollSize

private

Definition at line 11 of file tscroll.h.

Referenced by ScrollBack(), TScroller(), and update().

Mouse

TMouse& TScroller::Mouse

private

Definition at line 16 of file tscroll.h.

Referenced by ScrollBack().

pcScrollData

char* TScroller::pcScrollData

private

Definition at line 10 of file tscroll.h.

Referenced by ScrollBack(), TScroller(), update(), and ~TScroller().

strip

stripfunc* TScroller::strip

private

Definition at line 15 of file tscroll.h.

Referenced by init(), and TScroller().

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The documentation for this class was generated from the following files:

• base/applications/network/telnet/src/tscroll.h
• base/applications/network/telnet/src/tscroll.cpp