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xvtext.c
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xvtext.c
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/*
* xvtext.c - text file display window routines
*
* includes:
* void CreateTextWins(geom, cmtgeom);
* void OpenTextView(text, textlen, title, freeonclose);
* void OpenCommentText();
* void CloseCommentText();
* void ChangeCommentText();
* void HideTextWindows();
* void UnHideTextWindows();
* void RaiseTextWindows();
* void SetTextCursor(Cursor);
* void KillTextWindows();
* int TextCheckEvent(evt, int *retval, int *done);
*
*/
#include "copyright.h"
#include "xv.h"
#define BUTTW 80
#define BUTTH 24
#define TOPMARGIN 30 /* from top of window to top of text window */
#define BOTMARGIN (5+BUTTH+5) /* room for a row of buttons at bottom */
#define LRMARGINS 5 /* left and right margins */
#define MAXTVWIN 2 /* total # of windows */
#define MAXTEXTWIN 1 /* # of windows for text file viewing */
#define CMTWIN 1 /* cmtwin is reserved for image comments */
/* button/menu indicies */
#define TV_ASCII 0
#define TV_HEX 1
#define TV_CLOSE 2
#define TV_NBUTTS 3
#define TITLELEN 128
/* data needed per text window */
typedef struct { Window win, textW;
int vis, wasvis;
char *text; /* text to be displayed */
int freeonclose; /* free text when closing win */
int textlen; /* length of text */
char title[TITLELEN]; /* name of file being displayed */
char **lines; /* ptr to array of line ptrs */
int numlines; /* # of lines in text */
int hexlines; /* # of lines in HEX mode */
int maxwide; /* length of longest line (ascii) */
int wide, high; /* size of outer window (win) */
int twWide, twHigh; /* size of inner window (textW) */
int chwide, chhigh; /* size of textW, in chars */
int hexmode; /* true if disp Hex, else Ascii */
SCRL vscrl, hscrl;
BUTT but[TV_NBUTTS], nopBut;
} TVINFO;
static TVINFO tinfo[MAXTVWIN];
static int hasBeenSized = 0;
static int haveWindows = 0;
static int mfwide, mfhigh, mfascent; /* size of chars in mono font */
static int *event_retP, *event_doneP; /* used in tvChkEvent() */
static void closeText PARM((TVINFO *));
static int tvChkEvent PARM((TVINFO *, XEvent *));
static void resizeText PARM((TVINFO *, int, int));
static void computeScrlVals PARM((TVINFO *));
static void doCmd PARM((TVINFO *, int));
static void drawTextView PARM((TVINFO *));
static void drawNumLines PARM((TVINFO *));
static void eraseNumLines PARM((TVINFO *));
static void drawTextW PARM((int, SCRL *));
static void clickText PARM((TVINFO *, int, int));
static void keyText PARM((TVINFO *, XKeyEvent *));
static void textKey PARM((TVINFO *, int));
static void doHexAsciiCmd PARM((TVINFO *, int));
static void computeText PARM((TVINFO *));
/* HEXMODE output looks like this:
0x00000000: 00 11 22 33 44 55 66 77 - 88 99 aa bb cc dd ee ff 0123456789abcdef
0x00000010: 00 11 22 33 44 55 66 77 - 88 99 aa bb cc dd ee ff 0123456789abcdef
etc.
*/
/***************************************************************/
void CreateTextWins(geom, cmtgeom)
char *geom, *cmtgeom;
{
int i, defwide, defhigh, cmthigh;
XSizeHints hints;
XSetWindowAttributes xswa;
TVINFO *tv;
mfwide = monofinfo->max_bounds.width;
mfhigh = monofinfo->ascent + monofinfo->descent;
mfascent = monofinfo->ascent;
/* compute default size of textview windows. should be big enough to
hold an 80x24 text window */
defwide = 80 * mfwide + 2*LRMARGINS + 8 + 20; /* -ish */
defhigh = 24 * mfhigh + TOPMARGIN + BOTMARGIN + 8 + 20; /* ish */
cmthigh = 6 * mfhigh + TOPMARGIN + BOTMARGIN + 8 + 20; /* ish */
/* creates *all* textview windows at once */
for (i=0; i<MAXTVWIN; i++) tinfo[i].win = (Window) NULL;
for (i=0; i<MAXTVWIN; i++) {
tv = &tinfo[i];
tv->win = CreateWindow((i<CMTWIN) ? "xv text viewer" : "xv image comments",
"XVtextview",
(i<CMTWIN) ? geom : cmtgeom,
defwide,
(i<CMTWIN) ? defhigh : cmthigh,
infofg, infobg, 1);
if (!tv->win) FatalError("can't create textview window!");
haveWindows = 1;
tv->vis = tv->wasvis = 0;
if (ctrlColor) XSetWindowBackground(theDisp, tv->win, locol);
else XSetWindowBackgroundPixmap(theDisp, tv->win, grayTile);
/* note: everything is sized and positioned in resizeText() */
tv->textW = XCreateSimpleWindow(theDisp, tv->win, 1,1, 100,100,
1,infofg,infobg);
if (!tv->textW) FatalError("can't create textview text window!");
SCCreate(&(tv->vscrl), tv->win, 0,0, 1,100, 0,0,0,0,
infofg, infobg, hicol, locol, drawTextW);
SCCreate(&(tv->hscrl), tv->win, 0,0, 0,100, 0,0,0,0,
infofg, infobg, hicol, locol, drawTextW);
if (XGetNormalHints(theDisp, tv->win, &hints))
hints.flags |= PMinSize;
else
hints.flags = PMinSize;
hints.min_width = 380;
hints.min_height = 200;
XSetNormalHints(theDisp, tv->win, &hints);
#ifdef BACKING_STORE
xswa.backing_store = WhenMapped;
XChangeWindowAttributes(theDisp, tv->textW, CWBackingStore, &xswa);
#endif
XSelectInput(theDisp, tv->textW, ExposureMask | ButtonPressMask);
BTCreate(&(tv->but[TV_ASCII]), tv->win, 0,0,BUTTW,BUTTH,
"Ascii",infofg,infobg,hicol,locol);
BTCreate(&(tv->but[TV_HEX]), tv->win, 0,0,BUTTW,BUTTH,
"Hex",infofg,infobg,hicol,locol);
BTCreate(&(tv->but[TV_CLOSE]), tv->win, 0,0,BUTTW,BUTTH,
"Close",infofg,infobg,hicol,locol);
BTCreate(&(tv->nopBut), tv->win, 0,0, (u_int) tv->vscrl.tsize+1,
(u_int) tv->vscrl.tsize+1, "", infofg, infobg, hicol, locol);
tv->nopBut.active = 0;
XMapSubwindows(theDisp, tv->win);
tv->text = (char *) NULL;
tv->textlen = 0;
tv->title[0] = '\0';
}
for (i=0; i<MAXTVWIN; i++) {
resizeText(&tinfo[i], defwide, (i<CMTWIN) ? defhigh : cmthigh);
XSelectInput(theDisp, tinfo[i].win, ExposureMask | ButtonPressMask |
KeyPressMask | StructureNotifyMask);
}
hasBeenSized = 1; /* we can now start looking at textview events */
}
/***************************************************************/
void TextView(fname)
char *fname;
{
/* given a filename, attempts to read in the file and open a textview win */
long textlen;
char *text, buf[512], title[128], rfname[MAXPATHLEN+1];
char *basefname[128]; /* just current fname, no path */
FILE *fp;
basefname[0] = '\0';
strcpy(rfname, fname);
/* see if this file is compressed. if it is, uncompress it, and view
the uncompressed version */
if (ReadFileType(fname) == RFT_COMPRESS) {
#ifndef VMS
if (!UncompressFile(fname, rfname)) return; /* failed to uncompress */
#else
/* chop off trailing '.Z' from friendly displayed basefname, if any */
strcpy (basefname, fname);
*rindex (basefname, '.') = '\0';
if (!UncompressFile(basefname, rfname)) return;/* failed to uncompress */
#endif
}
fp = fopen(rfname, "r");
if (!fp) {
sprintf(buf,"Couldn't open '%s': %s", rfname, ERRSTR(errno));
ErrPopUp(buf,"\nOh well");
return;
}
fseek(fp, 0L, 2);
textlen = ftell(fp);
fseek(fp, 0L, 0);
if (!textlen) {
sprintf(buf, "File '%s' contains no data. (Zero length file.)", rfname);
ErrPopUp(buf, "\nOk");
fclose(fp);
return;
}
text = (char *) malloc((size_t) textlen);
if (!text) {
sprintf(buf, "Couldn't malloc %ld bytes to read file '%s'",
textlen, rfname);
ErrPopUp(buf, "\nSo what!");
fclose(fp);
return;
}
if (fread(text, (size_t) 1, (size_t) textlen, fp) != textlen) {
sprintf(buf, "Warning: Couldn't read all of '%s'. Possibly truncated.",
rfname);
ErrPopUp(buf, "\nHmm...");
}
fclose(fp);
sprintf(title, "File: '%s'", BaseName(fname));
OpenTextView(text, (int) textlen, title, 1);
/* note: text gets freed when window gets closed */
}
/***************************************************************/
void OpenTextView(text, len, title, freeonclose)
char *text, *title;
int len, freeonclose;
{
/* opens up a textview window */
TVINFO *tv;
tv = &tinfo[0];
/* kill off old text info */
if (tv->freeonclose && tv->text) free(tv->text);
if (tv->lines) free(tv->lines);
tv->text = (char *) NULL;
tv->lines = (char **) NULL;
tv->numlines = tv->textlen = tv->hexmode = 0;
tv->text = text;
tv->textlen = len;
tv->freeonclose = freeonclose;
strncpy(tv->title, title, (size_t) TITLELEN-1);
tv->title[TITLELEN-1] = '\0';
computeText(tv); /* compute # lines and linestarts array */
anyTextUp = 1;
if (!tv->vis) XMapRaised(theDisp, tv->win);
else {
XClearArea(theDisp, tv->win, 0, 0, (u_int) tv->wide, (u_int) 30, False);
drawTextView(tv);
}
tv->vis = 1;
SCSetVal(&(tv->vscrl), 0);
SCSetVal(&(tv->hscrl), 0);
computeScrlVals(tv);
}
/***************************************************************/
void OpenCommentText()
{
/* opens up the reserved 'comment' textview window */
TVINFO *tv;
tv = &tinfo[CMTWIN];
commentUp = 1;
XMapRaised(theDisp, tv->win);
tv->vis = 1;
ChangeCommentText();
}
/***************************************************************/
void CloseCommentText()
{
/* closes the reserved 'comment' textview window */
closeText(&tinfo[CMTWIN]);
commentUp = 0;
}
/***************************************************************/
void ChangeCommentText()
{
/* called when 'picComments' changes */
TVINFO *tv;
tv = &tinfo[CMTWIN];
tv->text = picComments;
tv->textlen = (tv->text) ? strlen(tv->text) : 0;
tv->freeonclose = 0;
if (strlen(fullfname))
sprintf(tv->title, "File: '%s'", BaseName(fullfname));
else
sprintf(tv->title, "<no file loaded>");
computeText(tv); /* compute # lines and linestarts array */
if (tv->vis) {
XClearArea(theDisp, tv->win, 0, 0, (u_int) tv->wide, (u_int) 30, False);
drawTextView(tv);
}
SCSetVal(&(tv->vscrl), 0);
SCSetVal(&(tv->hscrl), 0);
computeScrlVals(tv);
}
/***************************************************************/
void HideTextWindows()
{
int i;
for (i=0; i<MAXTVWIN; i++) {
if (tinfo[i].vis) {
XUnmapWindow(theDisp, tinfo[i].win);
tinfo[i].wasvis = 1;
tinfo[i].vis = 0;
}
}
}
/***************************************************************/
void UnHideTextWindows()
{
int i;
for (i=0; i<MAXTVWIN; i++) {
if (tinfo[i].wasvis) {
XMapRaised(theDisp, tinfo[i].win);
tinfo[i].wasvis = 0;
tinfo[i].vis = 1;
}
}
}
/***************************************************************/
void RaiseTextWindows()
{
int i;
for (i=0; i<MAXTEXTWIN; i++) {
if (tinfo[i].vis) {
XRaiseWindow(theDisp, tinfo[i].win);
}
}
}
/***************************************************************/
void SetTextCursor(c)
Cursor c;
{
int i;
for (i=0; i<MAXTVWIN; i++) {
if (haveWindows && tinfo[i].win) XDefineCursor(theDisp, tinfo[i].win, c);
}
}
/***************************************************************/
void KillTextWindows()
{
int i;
for (i=0; i<MAXTVWIN; i++) {
if (haveWindows && tinfo[i].win) XDestroyWindow(theDisp, tinfo[i].win);
}
}
/***************************************************************/
int TextCheckEvent(xev, retP, doneP)
XEvent *xev;
int *retP, *doneP;
{
int i;
event_retP = retP; /* so don't have to pass these all over the place */
event_doneP = doneP;
for (i=0; i<MAXTVWIN; i++) {
if (tvChkEvent(&tinfo[i], xev)) break;
}
if (i<MAXTVWIN) return 1;
return 0;
}
/***************************************************************/
int TextDelWin(win)
Window win;
{
/* got a delete window request. see if the window is a textview window,
and close accordingly. Return 1 if event was eaten */
int i;
for (i=0; i<MAXTVWIN; i++) {
if (tinfo[i].win == win) {
closeText(&tinfo[i]);
return 1;
}
}
return 0;
}
/**************************************************************/
/*** INTERNAL FUNCTIONS ***/
/**************************************************************/
/***************************************************************/
static void closeText(tv)
TVINFO *tv;
{
/* closes specified textview window */
int i;
XUnmapWindow(theDisp, tv->win);
tv->vis = 0;
for (i=0; i<MAXTEXTWIN && !tinfo[i].vis; i++);
if (i==MAXTEXTWIN) anyTextUp = 0;
/* free all info for this textview window */
if (tv->freeonclose && tv->text) free(tv->text);
if (tv->lines) free(tv->lines);
tv->text = (char *) NULL;
tv->lines = (char **) NULL;
tv->numlines = tv->textlen = tv->hexmode = 0;
}
/***************************************************************/
static int tvChkEvent(tv, xev)
TVINFO *tv;
XEvent *xev;
{
/* checks event to see if it's a text-window related thing. If it
is, it eats the event and returns '1', otherwise '0'. */
int rv;
rv = 1;
if (!hasBeenSized) return 0; /* ignore evrythng until we get 1st Resize */
if (xev->type == Expose) {
int x,y,w,h;
XExposeEvent *e = (XExposeEvent *) xev;
x = e->x; y = e->y; w = e->width; h = e->height;
/* throw away excess redraws for 'dumb' windows */
if (e->count > 0 && (e->window == tv->vscrl.win ||
e->window == tv->hscrl.win)) {}
else if (e->window == tv->vscrl.win) SCRedraw(&(tv->vscrl));
else if (e->window == tv->hscrl.win) SCRedraw(&(tv->hscrl));
else if (e->window == tv->win || e->window == tv->textW) { /* smart wins */
/* group individual expose rects into a single expose region */
int count;
Region reg;
XRectangle rect;
XEvent evt;
xvbcopy((char *) e, (char *) &evt, sizeof(XEvent));
reg = XCreateRegion();
count = 0;
do {
if (DEBUG) fprintf(stderr," expose: %s %d,%d %dx%d\n",
(e->window == tv->win) ? "tv win" : "text win",
rect.x, rect.y, rect.width, rect.height);
rect.x = evt.xexpose.x;
rect.y = evt.xexpose.y;
rect.width = evt.xexpose.width;
rect.height = evt.xexpose.height;
XUnionRectWithRegion(&rect, reg, reg);
count++;
} while (XCheckWindowEvent(theDisp, evt.xexpose.window,
ExposureMask, &evt));
XClipBox(reg, &rect); /* bounding box of region */
XSetRegion(theDisp, theGC, reg);
if (DEBUG) {
fprintf(stderr,"win = %lx, tv->win = %lx, textW = %lx\n",
e->window, tv->win, tv->textW);
fprintf(stderr,"grouped %d expose events into %d,%d %dx%d rect\n",
count, rect.x, rect.y, rect.width, rect.height);
}
if (e->window == tv->win) drawTextView(tv);
else if (e->window == tv->textW) drawTextW(0, &(tv->vscrl));
XSetClipMask(theDisp, theGC, None);
XDestroyRegion(reg);
}
else rv = 0;
}
else if (xev->type == ButtonPress) {
XButtonEvent *e = (XButtonEvent *) xev;
int x,y;
x = e->x; y = e->y;
if (e->button == Button1) {
if (e->window == tv->win) clickText(tv,x,y);
else if (e->window == tv->vscrl.win) SCTrack(&(tv->vscrl),x,y);
else if (e->window == tv->hscrl.win) SCTrack(&(tv->hscrl),x,y);
else if (e->window == tv->textW) { }
else rv = 0;
}
else rv = 0;
}
else if (xev->type == KeyPress) {
XKeyEvent *e = (XKeyEvent *) xev;
if (e->window == tv->win) keyText(tv, e);
else rv = 0;
}
else if (xev->type == ConfigureNotify) {
XConfigureEvent *e = (XConfigureEvent *) xev;
if (e->window == tv->win) {
if (DEBUG)
fprintf(stderr,"textview got a configure event (%dx%d)\n",
e->width, e->height);
if (tv->wide != e->width || tv->high != e->height) {
if (DEBUG) fprintf(stderr,"Forcing a redraw! (from configure)\n");
XClearArea(theDisp, tv->win, 0, 0,
(u_int) e->width, (u_int) e->height, True);
resizeText(tv, e->width, e->height);
}
}
else rv = 0;
}
else rv = 0;
return rv;
}
/***************************************************************/
static void resizeText(tv,w,h)
TVINFO *tv;
int w,h;
{
int i, maxw, maxh;
XSizeHints hints;
if (tv->wide == w && tv->high == h) return; /* no change in size */
if (XGetNormalHints(theDisp, tv->win, &hints)) {
hints.width = w;
hints.height = h;
hints.flags |= USSize;
XSetNormalHints(theDisp, tv->win, &hints);
}
tv->wide = w; tv->high = h;
/* compute maximum size of text window */
maxw = tv->wide - (2*LRMARGINS) - (tv->vscrl.tsize+1) - 2;
maxh = tv->high - (TOPMARGIN + BOTMARGIN) - (tv->hscrl.tsize+1) - 2;
tv->chwide = ((maxw - 6) / mfwide);
tv->chhigh = ((maxh - 6) / mfhigh);
tv->twWide = tv->chwide * mfwide + 6;
tv->twHigh = tv->chhigh * mfhigh + 6;
XMoveResizeWindow(theDisp, tv->textW, LRMARGINS, TOPMARGIN,
(u_int) tv->twWide, (u_int) tv->twHigh);
for (i=0; i<TV_NBUTTS; i++) {
tv->but[i].x = tv->wide - (TV_NBUTTS-i) * (BUTTW+5);
tv->but[i].y = tv->high - BUTTH - 5;
}
computeScrlVals(tv);
tv->nopBut.x = LRMARGINS + tv->twWide + 1;
tv->nopBut.y = TOPMARGIN + tv->twHigh + 1;
}
/***************************************************************/
static void computeScrlVals(tv)
TVINFO *tv;
{
int hmax, hpag, vmax, vpag;
if (tv->hexmode) {
hmax = 80 - tv->chwide;
vmax = tv->hexlines - tv->chhigh;
}
else { /* ASCII mode */
hmax = tv->maxwide - tv->chwide;
vmax = tv->numlines - tv->chhigh - 1;
}
hpag = tv->chwide / 4;
vpag = tv->chhigh - 1;
SCChange(&tv->vscrl, LRMARGINS + tv->twWide+1, TOPMARGIN,
1, tv->twHigh, 0, vmax, tv->vscrl.val, vpag);
SCChange(&tv->hscrl, LRMARGINS, TOPMARGIN + tv->twHigh + 1,
0, tv->twWide, 0, hmax, tv->hscrl.val, hpag);
}
/***************************************************************/
static void doCmd(tv, cmd)
TVINFO *tv;
int cmd;
{
switch (cmd) {
case TV_ASCII: doHexAsciiCmd(tv, 0); break;
case TV_HEX: doHexAsciiCmd(tv, 1); break;
case TV_CLOSE: if (tv == &tinfo[CMTWIN]) CloseCommentText();
else closeText(tv);
break;
}
}
/***************************************************************/
static void drawTextView(tv)
TVINFO *tv;
{
/* redraw the outer window */
int i, y;
if (strlen(tv->title)) { /* draw the title */
y = 5;
XSetForeground(theDisp, theGC, infobg);
XFillRectangle(theDisp, tv->win, theGC, 5+1, y+1,
(u_int) StringWidth(tv->title)+6, (u_int) CHIGH+4);
XSetForeground(theDisp, theGC, infofg);
XDrawRectangle(theDisp, tv->win, theGC, 5, y,
(u_int) StringWidth(tv->title)+7, (u_int) CHIGH+5);
Draw3dRect(tv->win, 5+1, y+1, (u_int) StringWidth(tv->title)+5,
(u_int) CHIGH+3, R3D_IN, 2, hicol, locol, infobg);
XSetForeground(theDisp, theGC, infofg);
DrawString(tv->win, 5+3, y+ASCENT+3, tv->title);
}
drawNumLines(tv);
/* draw the buttons */
for (i=0; i<TV_NBUTTS; i++) BTRedraw(&(tv->but[i]));
BTRedraw(&tv->nopBut);
}
/***************************************************************/
static void drawNumLines(tv)
TVINFO *tv;
{
int x, y, w, nl;
char tmpstr[128];
if (tv->hexmode) nl = tv->hexlines;
else {
if (tv->numlines>0 &&
tv->lines[tv->numlines-1] - tv->lines[tv->numlines-2] == 1)
nl = tv->numlines - 2; /* line after last \n has zero length */
else nl = tv->numlines - 1;
}
if (nl<0) nl = 0;
sprintf(tmpstr, "%d byte%s, %d line%s",
tv->textlen, (tv->textlen!=1) ? "s" : "",
nl, (nl!=1) ? "s" : "");
w = StringWidth(tmpstr) + 7; /* width of frame */
x = LRMARGINS + tv->twWide + tv->vscrl.tsize+1; /* right align point */
y = 6;
XSetForeground(theDisp, theGC, infobg);
XFillRectangle(theDisp, tv->win, theGC, (x-w)+1, y+1,
(u_int) (w-1), (u_int) CHIGH+4);
XSetForeground(theDisp, theGC, infofg);
XDrawRectangle(theDisp, tv->win, theGC, x-w, y, (u_int) w, (u_int) CHIGH+5);
Draw3dRect(tv->win, (x-w)+1, y+1, (u_int) (w-2), (u_int) CHIGH+3,
R3D_IN,2,hicol,locol,infobg);
XSetForeground(theDisp, theGC, infofg);
DrawString(tv->win, (x-w)+3, y+ASCENT+3, tmpstr);
}
/***************************************************************/
static void eraseNumLines(tv)
TVINFO *tv;
{
int x, y, w, nl;
char tmpstr[64];
nl = (tv->hexmode) ? tv->hexlines : tv->numlines-1;
sprintf(tmpstr, "%d byte%s, %d line%s",
tv->textlen, (tv->textlen>1) ? "s" : "",
nl, (nl>1) ? "s" : "");
w = StringWidth(tmpstr) + 7; /* width of frame */
x = LRMARGINS + tv->twWide + tv->vscrl.tsize+1; /* right align point */
y = 5;
XClearArea(theDisp, tv->win, x-w, y, (u_int) w+1, (u_int) CHIGH+7, False);
}
/***************************************************************/
static void drawTextW(delta, sptr)
int delta;
SCRL *sptr;
{
int i, j, lnum, hpos, cpos, extrach, lwide;
TVINFO *tv;
char linestr[512];
u_char *sp, *ep, *lp;
/* figure out TVINFO pointer from SCRL pointer */
for (i=0; i<MAXTVWIN && sptr != &tinfo[i].vscrl
&& sptr != &tinfo[i].hscrl; i++);
if (i==MAXTVWIN) return; /* didn't find one */
tv = &tinfo[i];
/* make sure we've been sized. Necessary, as creating/modifying the
scrollbar calls this routine directly, rather than through
TextCheckEvent() */
if (!hasBeenSized) return;
XSetForeground(theDisp, theGC, infofg);
XSetBackground(theDisp, theGC, infobg);
XSetFont(theDisp, theGC, monofont);
hpos = tv->hscrl.val;
lwide = (tv->chwide < 500) ? tv->chwide : 500;
/* draw text */
if (!tv->hexmode) { /* ASCII mode */
for (i=0; i<tv->chhigh; i++) { /* draw each line */
lnum = i + tv->vscrl.val;
if (lnum < tv->numlines-1) {
/* find start of displayed portion of line. This is *wildly*
complicated by the ctrl-character and tab expansion... */
sp = (byte *) tv->lines[lnum];
ep = (byte *) tv->lines[lnum+1] - 1; /* ptr to last disp ch in line */
extrach = 0;
for (cpos=0; cpos<hpos && sp<ep; cpos++) {
if (!extrach) {
if (*sp == '\011') { /* tab to next multiple of 8 */
extrach = ((cpos+8) & (~7)) - cpos;
extrach--;
}
else if (*sp == '\015') { /* ^M not displayed */
cpos--; sp++;
}
else if (*sp < 32) extrach = 1;
else if (*sp > 127) extrach = 3;
else sp++;
}
else {
extrach--;
if (!extrach) sp++;
}
}
/* at this point, 'sp' is pointing to the first char to display.
if sp is a 'special' character, extrach is the # of chars
left to display of the 'expanded' version. If sp>=ep, a blank
line should be printed */
/* build up the linestr buffer, which is the current line, padded
with blanks to a width of exactly tv->chwide chars */
for (cpos=0, lp=(byte *) linestr; cpos<lwide; cpos++, lp++) {
if (sp>=ep) *lp = ' ';
else {
if (*sp == '\011') { /* tab to next multiple of 8 */
if (!extrach) extrach = ((cpos+hpos+8) & (~7)) - (cpos+hpos);
if (extrach) *lp = ' ';
}
else if (*sp == '\015') { /* don't show ^M */
cpos--; lp--; sp++;
}
else if (*sp < 32) {
if (!extrach) extrach = 2;
if (extrach == 2) *lp = '^';
else if (extrach == 1) *lp = *sp + 64;
}
else if (*sp > 127) {
if (!extrach) extrach = 4;
if (extrach == 4) *lp = '\\';
else if (extrach == 3) *lp = ((u_char)(*sp & 0700) >> 6) + '0';
else if (extrach == 2) *lp = ((u_char)(*sp & 0070) >> 3) + '0';
else if (extrach == 1) *lp = ((*sp & 0007)) + '0';
}
else *lp = *sp++;
if (extrach) {
extrach--;
if (!extrach) sp++;
}
}
}
}
else { /* below bottom of file. Just build a blank str */
for (cpos = 0; cpos<lwide; cpos++) linestr[cpos]=' ';
}
/* draw the line */
XDrawImageString(theDisp, tv->textW, theGC,
3, i*mfhigh + 3 + mfascent, linestr, lwide);
} /* for i ... */
} /* if hexmode */
else { /* HEX MODE */
for (i=0; i<tv->chhigh; i++) { /* draw each line */
lnum = i + tv->vscrl.val;
if (lnum < tv->hexlines) {
char hexstr[80], tmpstr[16];
/* generate hex for this line */
sprintf(hexstr, "0x%08x: ", lnum * 0x10);
sp = (byte *) tv->text + lnum * 0x10;
ep = (byte *) tv->text + tv->textlen; /* ptr to end of buffer */
for (j=0; j<16; j++) {
if (sp+j < ep) sprintf(tmpstr,"%02x ", sp[j]);
else sprintf(tmpstr," ");
strcat(hexstr, tmpstr);
if (j==7) {
if (sp+8<ep) strcat(hexstr,"- ");
else strcat(hexstr," ");
}
}
strcat(hexstr," ");
lp = (byte *) hexstr + strlen(hexstr);
for (j=0; j<16; j++) {
if (sp+j < ep) {
if (sp[j] >= 32 && sp[j] <= 127) *lp++ = sp[j];
else *lp++ = '.';
}
else *lp++ = ' ';
}
*lp = '\0';
/* at this point, 'hexstr' contains an 80 column hex thingy.
now build 'linestr', which is going to have hexstr shifted
and/or padded with blanks (ie, the displayed portion or hexstr) */
/* skip obscured beginning of line, if any */
for (cpos=0, sp=(byte *) hexstr; cpos<hpos && *sp; cpos++, sp++);
for (cpos=0, lp=(byte *)linestr; cpos<lwide; cpos++, lp++) {
if (*sp) { *lp = *sp++; }
else *lp = ' ';
}
}
else { /* below bottom of file. just build blank str */
for (cpos=0; cpos<lwide; cpos++) linestr[cpos]=' ';
}
/* draw the line */
XDrawImageString(theDisp, tv->textW, theGC,
3, i*mfhigh + 3 + mfascent, linestr, lwide);
} /* for i ... */
} /* else hexmode */
XSetFont(theDisp, theGC, mfont);
Draw3dRect(tv->textW, 0, 0, (u_int) (tv->twWide-1), (u_int) (tv->twHigh-1),
R3D_IN, 2, hicol, locol, infobg);
}
/***************************************************************/