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d_wedit.cpp
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d_wedit.cpp
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/***************************************************************
BayCom(R) Packet-Radio fuer IBM PC
OpenBCM-Mailbox
--------------
Fenster-Editor
--------------
Copyright (c) Florian Radlherr
Taubenbergstr. 32
83627 Warngau
Alle Rechte vorbehalten / All Rights reserved
***************************************************************/
//19980202 OE3DZW corrected IBM-characters
//19990817 DH3MB made this feature optional (define FEATURE_EDITOR in
// baycom.h)
#include "baycom.h"
/*---------------------------------------------------------------------------*/
#define EDLEN 64000U
/*---------------------------------------------------------------------------*/
/*
curline current line -1 0..n
curcol current column -1 0..n
maxbuf last valid index into buf -1
maxlines last valid line number -1
index
readindex
blockbegin begin line
blockend
blockmark
modified
wordwrap
xoffset
readlines
*/
/*---------------------------------------------------------------------------*/
char *buf;
struct edstruct *e;
#ifdef FEATURE_EDITOR
static char searchstr[81];
static unsigned shiftgedrueckt = 0;
/*---------------------------------------------------------------------------*/
static void near putpos (void)
//*************************************************************************
//
// Zeigt momentane Cursorposition im Buffer als Balken am Fensterrand
//
//*************************************************************************
{
unsigned i, ypos =
(unsigned)(((long)e->curline*(e->ylen-2-2*e->frame))/(e->maxlines+1));
unsigned col;
if (iskeytask())
col = color.activ_frame;
else
col = color.back_frame;
wc(e->xend, e->y+e->frame, col, 30); // Pfeil hoch am oberen Ende
wc(e->xend, e->yend-e->frame, col, 31); // Pfeil runter am unteren Ende
for (i = (e->y+1+e->frame); i < (e->yend-e->frame); i++)
// Balken am rechten Rand des Fensters
{
if (i == (ypos+e->y+2))
wc(e->xend, i, col, (char)'þ'); // momentane Position markieren
else
wc(e->xend, i, col, (char)' '); // sonst frei lassen
}
if (e->frame)
{
wf(e->x+3, e->yend, col, " %d << %d:%d >>>",
e->modified, e->curline+1, e->curcol+1);
}
}
/*---------------------------------------------------------------------------*/
static void near lineout (void)
//*************************************************************************
//
// Gibt die aktuelle Zeile fuer den Horizontal-Editor aus
// und setzt den Hardwarecursor
//
//*************************************************************************
{
int i;
setzcurs(e->curcol-e->xoffset+e->frame, e->readlines+e->frame, e);
if (e->linbuf)
{
int zeile = e->y+e->readlines+e->frame;
int block = (e->readindex>=e->blockbegin) && (e->readindex<e->blockend);
int farbe = block ? color.edit_block : color.edit_text;
int xpos = e->xoffset-e->x-e->frame;
for (i = e->x+e->frame; i<e->xend; i++)
wc(i, zeile, farbe, e->linbuf[xpos+i]);
}
}
/*---------------------------------------------------------------------------*/
static int edupdate (int full)
//*************************************************************************
//
// Uebertraegt den Puffer an der aktuellen Position in das Bildschirmfenster
//
//*************************************************************************
{
int x, y, i=e->index;
int attr, blank; // vorbesetzen fuer hoehere Geschwindigkeit
int yline;
int a;
int pos;
int xend = e->xend;
unsigned maxbuf = e->maxbuf;
unsigned col;
if (video_off)
return OK;
if (iskeytask())
col = color.activ_frame;
else
col = color.back_frame;
if (full)
wframe(col, e->title, 0);
putpos(); // Position anzeigen
if (taskkbhit())
return 0; // nur weitermachen wenn keine Taste gedrueckt
for (y = e->y+e->frame; y <= (e->yend-e->frame); y++)
{
x = e->xoffset;
yline = (bildspalten*y);
if ((i >= e->blockbegin) && (i < e->blockend))
attr = color.edit_block << 8;
else
attr = color.edit_text << 8;
blank = attr | ' ';
while (x && (i < maxbuf) && (buf[i] != LF))
{
i++;
x--;
}
x = e->x+e->frame;
while (((a = buf[i]) != LF) && (i < maxbuf))
{
if (x < xend)
{
if (vorne[pos = yline+(x++)] == wa)
vram[pos] = a | attr;
}
i++;
}
i++;
while (x < xend)
{
if (vorne[pos = yline+(x++)] == wa)
vram[pos] = blank;
}
}
lineout();
return OK;
}
/*---------------------------------------------------------------------------*/
static int near linelength (int index)
//*************************************************************************
//
// Bestimmt die Laenge der mit 'index' referierten Zeile ( 1 == nur LF )
//
//*************************************************************************
{
int indexalt = index;
while (buf[index++] != LF);
return index-indexalt;
}
/*---------------------------------------------------------------------------*/
static void near testxoffset (void)
//*************************************************************************
//
// Prueft Cursorposition und tatsaechliches Bildschirmfenster auf
// Uebereinstimmung und veranlasst ggf. horizontales Scrolling
//
//*************************************************************************
{
while (e->curcol >= (e->xoffset + e->xend- e->x - 1))
e->xoffset++;
while (e->curcol < (e->xoffset + 5*(e->curcol > 4)))
e->xoffset--;
}
/*---------------------------------------------------------------------------*/
static void near crechts (void)
//*************************************************************************
//
// Positioniert den Cursor um 1 nach rechts
//
//*************************************************************************
{
if(e->curcol < (LINLEN-1))
{
e->curcol++;
testxoffset();
}
}
/*---------------------------------------------------------------------------*/
static void near calcrlines (void)
//*************************************************************************
//
// Stellt vertikale Editorpositon des Cursors im Buffer fest
//
//*************************************************************************
{
int r = e->readlines;
e->readindex = e->index;
if (e->index < e->maxbuf)
{
while (r)
{
while (buf[e->readindex++] != LF);
r--;
}
}
}
/*---------------------------------------------------------------------------*/
static void near lineplus (int zeilenanzahl)
//*************************************************************************
//
// Scrollt um eine Anzahl Zeilen nach oben
//
//*************************************************************************
{
int i = zeilenanzahl;
while (i)
{
if (e->curline<e->maxlines)
{
if (e->index < e->maxbuf) e->curline++;
while ((e->index < e->maxbuf) && (buf[e->index++] != LF));
}
else
zeilenanzahl--;
i--;
}
if (zeilenanzahl != 1)
calcrlines();
else
while ((e->readindex < e->maxbuf) && buf[e->readindex++] != LF);
}
/*---------------------------------------------------------------------------*/
static void near lineminus (int zeilenanzahl)
//*************************************************************************
//
// Scrollt um eine Anzahl Zeilen nach unten
//
//*************************************************************************
{
int i = zeilenanzahl;
while (i)
{
if (e->index)
{
e->curline--;
e->index--;
}
while (e->index && (buf[e->index-1] != LF))
e->index--;
i--;
}
if (zeilenanzahl > 1)
calcrlines();
else
{
if (e->readindex) e->readindex--;
while (e->readindex && (buf[e->readindex-1] != LF))
e->readindex--;
}
}
/*---------------------------------------------------------------------------*/
static int near horizontalswitch (int a)
//*************************************************************************
//
// Verteilfunktion fuer alle horizontalen Cursorbewegungen
//
//*************************************************************************
{
int i;
switch (a)
{
case INSERT:
break;
case K_DELETE:
for (i = e->curcol; i < LINLEN-1; i++)
e->linbuf[i] = e->linbuf[i+1];
e->linbuf[LINLEN-1] = ' ';
e->modified++;
break;
case LINKS:
if (e->curcol)
e->curcol--;
break;
case RECHTS:
crechts();
break;
case POS1:
e->curcol = 0;
break;
case ENDE:
for (i = LINLEN-1; i && (e->linbuf[i-1] == ' '); i--);
e->curcol = i;
break;
default:
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------*/
static void near gotoline (int line, int immer)
//*************************************************************************
//
// Springt zur angegebenen Zeilennummer
//
// Dabei wird die momentane Cursorposition beruecksichtigt und der
// Bildschirm nur neu aufgebaut, wenn die Position ausserhalb liegt.
//
//*************************************************************************
{ unsigned i = 0, ok = 1;
unsigned max = e->maxbuf;
unsigned zeilenzaehler = 0;
unsigned yl = e->ylen-1;
if (! immer)
{
if (line == e->curline);
// **** Alte Zeile gleich neue Zeile -> nichts machen
else if ((line > e->curline) && (line < (e->curline+(yl-1-e->readlines))))
e->readlines += line-e->curline;
// **** Neue Zeile unterhalb alter Zeile, aber am gleichen Bildschirm
else if ((line < e->curline) && (line > (e->curline-e->readlines)))
e->readlines -= e->curline-line;
// **** Neue Zeile oberhalb alter Zeile, aber am gleichen Bildschirm
else if (line < (yl-2))
{
e->index = 0;
e->readlines = e->curline=line;
// **** Neue Zeile auf der ersten Bildschirmseite im Buffer
}
else if ((line > (e->maxlines-yl-1)) && (line<e->maxlines))
{
e->readindex = e->index = e->maxbuf;
e->curline = e->maxlines;
lineminus(yl-2);
e->readlines = (yl-2-(e->maxlines-line));
// **** Neue Zeile auf der letzten Bildschirmseite im Buffer
}
else
ok = 0;
}
if (immer || ! ok)
{ // **** Neue Zeile liegt ganz wo anders im Buffer, Zeile suchen
while (i < max)
{
if (buf[i++] == LF)
{
zeilenzaehler++;
if (zeilenzaehler == line)
break;
}
}
if (i >= max) // Zeilennummer nicht gefunden (zu hoch)
{
msgline("Line not found");
line = zeilenzaehler; // go to last line
while (i && buf[i] != LF) i--;
}
e->index = e->readindex = i; // zur gefundenen Stelle springen
if (immer == 2)
{
e->readlines = yl-1;
}
else
{
e->curline = line+(yl/2); // BS-Start wird zurueckgesetzt
lineminus(yl/2); // damit die Stelle in Bildmitte kommt
e->readlines = yl/2; // Cursor in Bildmitte setzen
}
}
e->curline=line; // Neue Zeile uebernehmen
calcrlines(); // Zeiger reorganisieren
}
/*---------------------------------------------------------------------------*/
static void near contsearch (void)
//*************************************************************************
//
// Sucht nach 'searchstr' und baut den Bildschirm an der gefundenen
// Position neu auf
//
//*************************************************************************
{
int count = 0;
int slines = e->curline;
unsigned sindex = e->readindex;
int found = 0;
int size = strlen(searchstr);
unsigned i = linelength(e->readindex);
if (e->curcol > i)
i += e->readindex - 1;
else
i = e->readindex + e->curcol + 1;
while (i < e->maxbuf)
{
while (((buf[i+count] ^ searchstr[count]) & 0x5f) == 0) count++;
if (count == size)
{
found++;
break;
}
count = 0;
if (buf[i++] == LF)
{
slines++;
sindex = i;
}
}
if (found)
{
e->curcol = i-sindex;
gotoline(slines, 0);
testxoffset();
}
else
msgline("Pattern not found");
}
/*---------------------------------------------------------------------------*/
static void near ctrlk (void)
//*************************************************************************
//
//*************************************************************************
{
int a;
setzcurs(0, 255, e);
wf(e->x+2, e->y, color.activ_frame, "^K");
a=waitkey() & 255;
wf(e->x+2, e->y, color.activ_frame, "");
switch (a)
{
case 'b':
e->blockbegin = e->readindex;
break;
case 'k':
e->blockend = e->readindex;
break;
}
}
/*---------------------------------------------------------------------------*/
static void near zuzeile (void)
//*************************************************************************
//
//*************************************************************************
{
char linstr[12];
int l;
linstr[0] = 0;
if (inputwin("Goto", "Line:", linstr, 10) != ESC)
l = atoi(linstr);
if (l > 0)
gotoline(l-1, 0);
else
msgline("Invalid line number");
}
/*---------------------------------------------------------------------------*/
static void near suchen (void)
//*************************************************************************
//
//*************************************************************************
{
if (inputwin("Search", "pattern:", searchstr, 40) != ESC)
contsearch();
}
/*---------------------------------------------------------------------------*/
static void near ctrlq (void)
//*************************************************************************
//
//*************************************************************************
{
int a;
setzcurs(0, 255, e);
wf(e->x+2, e->y, color.activ_frame, "^Q");
a = waitkey() & 255;
wf(e->x+2, e->y, color.activ_frame, "");
switch (a)
{
case 'f':
case 'a':
suchen();
break;
case 'n':
zuzeile();
break;
}
}
/*---------------------------------------------------------------------------*/
static int near edhorizontal (void)
//*************************************************************************
//
// Zeileneditor, in dem alle horizontalen Cursorbewegungen und Eingaben
// verarbeitet werden. Die Zeile wird komplett in einem Puffer bearbeitet
//
// Vertikale Aktionen werden an den Aufrufer zurueckgegeben
//
//*************************************************************************
{
int retwert = OK;
int i = strlen(e->linbuf);
unsigned a;
memset(e->linbuf+i, ' ', LINLEN-i); // Rest der Zeile mit Blanks vorbesetzen
e->linbuf[LINLEN] = 0;
while (((a = (unsigned) waitkey()) & 255) != ESC)
{
retwert = a & 255;
if ((bioskey(2) & 3) == 0)
shiftgedrueckt = 0;
if ((a & 255) == 0)
{
a >>= 8;
retwert = (unsigned) a;
if (horizontalswitch(a))
goto ende;
}
else
{
a &= 255;
if (a == CR) a = LF;
if ((a < ' ') && (a != LF) && (a != LINEDEL) && (a != BACKSPACE))
goto ende;
e->modified++;
if (a == LINEDEL) // CTRL-Y
{
for (i = 0; i < LINLEN; i++)
e->linbuf[i] = ' ';
e->curcol = 0;
goto ende;
}
if (a == BACKSPACE)
{
if (e->curcol)
{
e->curcol--;
for (i = e->curcol; i < LINLEN-1; i++)
e->linbuf[i] = e->linbuf[i+1];
e->linbuf[LINLEN-1] = ' ';
}
else
goto ende;
}
else
{
if (e->curcol < LINLEN)
{
for (i = LINLEN-1; i > e->curcol; i--)
e->linbuf[i] = e->linbuf[i-1];
e->linbuf[e->curcol] = a;
crechts();
if ((e->curcol >= e->wordwrap) && (a != LF))
{
for (i = e->curcol-1; i && (e->linbuf[i] != ' '); i--);
if (i == 0)
{
i = e->curcol-1;
e->linbuf[e->curcol] = e->linbuf[i];
e->curcol = 1;
}
else
e->curcol -= (i+1);
e->linbuf[i] = LF;
e->xoffset = 0;
e->maxlines++;
calcrlines();
retwert = LF;
goto ende;
}
}
}
if (a == LF)
{
retwert = LF;
e->curcol = 0;
testxoffset();
e->maxlines++;
calcrlines();
goto ende;
}
}
testxoffset();
lineout();
}
retwert = a & 255;
ende:
if (e->readlines > (e->ylen-1))
gotoline(e->curline, 1);
i = LINLEN-1; // von hinten her
while ((i >= 0) && (e->linbuf[i] == ' ')) // Ende der Eingabe feststellen
e->linbuf[i--] = 0;
return retwert;
}
/*---------------------------------------------------------------------------*/
static int near changeline (int a, int alt, char *linbuf)
//*************************************************************************
//
// Wird aufgerufen, wenn eine Zeile editiert worden ist
// Die Aenderungen werden in den Buffer uebernommen
//
//*************************************************************************
{
int i;
int neu = strlen(linbuf);
if (a == BACKSPACE)
{
if (e->index || e->readindex)
{
e->maxlines--;
if (e->readindex)
for (i = e->readindex-1; i && (buf[i-1] != LF); i--)
e->curcol++;
testxoffset();
if(neu)
{
neu--;
e->readindex--;
}
else
alt++;
}
else
a = RAUF;
}
if ((a == LINEDEL) && (e->curline != e->maxlines))
alt++;
e->maxbuf += (neu-alt);
if ((alt != neu) && (((long)e->maxbuf-(long)e->readindex-(long)neu) > 0))
{
memmove(buf+e->readindex+neu, buf+e->readindex+alt,
e->maxbuf-e->readindex-neu);
}
if (neu)
{
strcpy(buf + e->readindex, linbuf);
buf[e->readindex + neu + (a == BACKSPACE)] = LF;
}
return a;
}
/*---------------------------------------------------------------------------*/
static int near vertikalswitch (unsigned a)
//*************************************************************************
//
// Hier werden alle vertikalen Cursorsteuerungen bearbeitet
//
//*************************************************************************
{
int bslines = e->yend - e->y - 2*e->frame;
int retwert = 0;
if (bioskey(2) & 3)
{
if (! shiftgedrueckt)
{
e->blockmark = e->blockbegin = e->blockend = e->readindex;
shiftgedrueckt++;
}
}
else
shiftgedrueckt = 0;
switch(a)
{
case LINEDEL:
calcrlines();
if (e->curline != e->maxlines)
e->maxlines--;
break;
case CTRLF:
suchen();
break;
case CTRLN:
zuzeile();
break;
case CTRLQ:
ctrlq();
break;
case CTRLL:
contsearch();
break;
case CTRLK:
ctrlk();
break;
case BACKSPACE:
if (e->readlines)
{
e->readlines--;
e->curline--;
}
else
lineminus(1);
calcrlines();
break;
case RAUF:
if (e->readlines)
{
e->readlines--;
e->curline--;
if (e->readindex) e->readindex--;
while (e->readindex && (buf[e->readindex-1] != LF))
e->readindex--;
}
else
lineminus(1);
break;
case LF:
case RUNTER:
if ((e->readindex < e->maxbuf) && (e->curline < e->maxlines))
{
if (e->readlines < bslines)
{
e->readlines++;
e->curline++;
while ((e->readindex < e->maxbuf) && buf[e->readindex++] != LF);
}
else
lineplus(1);
}
break;
case PG_RAUF:
if (e->index)
lineminus(bslines);
else
{
e->readlines = 0;
e->curline = 0;
calcrlines();
}
break;
case PG_RUNTER:
if (e->readlines < bslines)
{
while (e->readlines < bslines)
{
if (e->readlines < e->maxlines)
{
e->readlines++;
e->curline++;
}
else
bslines = 0;
}
calcrlines();
}
else
{
if (e->readindex < e->maxbuf)
lineplus(bslines);
}
break;
case CTL_PG_RAUF:
gotoline(0, 0);
break;
case CTL_PG_RUNTER:
e->index = e->maxbuf;
while (buf[--e->index] != LF);
e->readlines = bslines;
while (e->readlines > e->maxlines)
e->readlines--;
lineminus(bslines);
e->curline = e->maxlines;
break;
default: retwert = a;
}
if (shiftgedrueckt)
{
if (e->blockmark >= e->readindex)
e->blockbegin = e->readindex;
if (e->blockmark <= e->readindex)
e->blockend = e->readindex;
}
return retwert;
}
/*---------------------------------------------------------------------------*/
static int near edvertikal (void)
//*************************************************************************
//
// Diese Routine wird zum Bearbeiten einer Zeile aufgerufen und
// koordiniert alle Cursorsteuerungen und Modifikationen
//
//*************************************************************************
{
int a;
int i = 0;
char linbuf[LINLEN+1];
int alt;
int mod = e->modified;
while((i < LINLEN) && ((linbuf[i] = buf[e->readindex+i]) != LF)
&& ((e->readindex+i) < e->maxbuf)) i++;
linbuf[i] = 0;
alt = strlen(linbuf);
e->linbuf = linbuf;
a = edhorizontal(); // Zeileneditor
e->linbuf = NULL;
if (a == LF && e->linefunc)
{
char *nl = strchr(linbuf, LF);
if (nl && strlen(nl) > 1)
memmove(nl, nl+1, strlen(nl));
if (linbuf[strlen(linbuf)-1] == LF)
linbuf[strlen(linbuf)-1] = 0;
changeline(0, alt, "");
(*(e->linefunc)) (linbuf);
calcrlines(); // Zeiger reorganisieren
}
else
{
if (mod != e->modified) // geaendert?
a = changeline(a, alt, linbuf); // ja, Aenderungen uebernehmen
}
a = vertikalswitch(a); // Vertikale Cursorsteuerung
edupdate(0); // ggf. Bildschirm neu schreiben
return a;
}
/*---------------------------------------------------------------------------*/
/*
static void putvo_edit (char c)
//*************************************************************************
//
//*************************************************************************
{
char s[4];
s[0] = c;
s[1] = LF;
s[2] = 0;
changeline(0, 1, s);
e->readindex++;
if(c == LF)
{
e->maxlines++;
e->curline++;
}
}
*/
/*---------------------------------------------------------------------------*/
static void near filespeichern (void)
//*************************************************************************
//
//*************************************************************************
{
FILE *ef = s_fopen(e->title, "swt");
if(ef)
{
setvbuf(ef, NULL, _IOFBF, 8192);
fwrite(buf, e->maxbuf, 1, ef);
s_fclose(ef);
}
}
/*---------------------------------------------------------------------------*/
void editwin (int file)
//*************************************************************************
//
// Eroeffnet ein Fenster zum Editieren und ruft zyklisch den Editor auf
//
//*************************************************************************
{
int a;
int schlussmachen = 0;
e->update = edupdate;
e->wordwrap = 80;
if (file)
;//gotoline(1, 1);
else
gotoline(e->curline, 2);
edupdate(1);
while(! schlussmachen)
{
e->shouldupdate++;
a = edvertikal();
if (a == LF)
{
sound(2000);
delay(50);
nosound();
}
if (a == ESC)
schlussmachen = 1;
if (schlussmachen && e->modified && file)
{
switch (yesno("Save changes?", 1))
{
case ESC:
schlussmachen = 0;
break;
case YES:
filespeichern();
break;
}
}
}
}
/*---------------------------------------------------------------------------*/
void editfile (char *name)
//*************************************************************************
//
//*************************************************************************
{
FILE *ef = s_fopen(name, "srt");
int a;
int pos = 0;
int lines = 0;
strupr(name);
strncpy(e->title, name, 39);
e->title[39] = 0;
e->buf = (char *) t_malloc(EDLEN, "edbu");
buf = e->buf;
e->x = 3;
e->xend = 70;
e->y = 3;
e->yend = bildzeilen-5;
e->update = edupdate;
wopen();
setkeyhere();
edupdate(1);
if (buf)
{
if (ef)
{
setvbuf(ef, NULL, _IOFBF, 8192);
while ((a = fgetc(ef)) != EOF)