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#ifndef lint
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static char SCCSid[] = "$SunId$ LBL";
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#endif
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/* Copyright (c) 1989 Regents of the University of California */
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/*
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* x11twind.c - routines for X11 text windows.
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*
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* Written by G. Ward
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* 10/30/87
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*
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* Modified for X11 by B. V. Smith
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* 9/26/88
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*/
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#include <stdio.h>
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#include <X11/Xlib.h>
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#include "x11twind.h"
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#define checkcurs(t) if ((t)->cursor) togglecurs(t)
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#define restorecurs checkcurs
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/* width/height of a character in fontstruct f */
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#define Width(f) ((f)->max_bounds.rbearing - (f)->min_bounds.lbearing)
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#define Height(f) ((f)->ascent + (f)->descent)
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#define YStart(f) ((f)->ascent)
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extern char *calloc(), *malloc();
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TEXTWIND *
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xt_open(dpy, gc, parent, x, y, width, height, bw, fontname)
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Display *dpy;
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GC gc;
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Window parent;
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int x, y;
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int width, height;
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int bw;
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char *fontname;
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{
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register int i;
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register TEXTWIND *t;
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if ((t = (TEXTWIND *)malloc(sizeof(TEXTWIND))) == NULL)
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return(NULL);
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t->dpy = dpy;
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t->w = XCreateSimpleWindow(dpy, parent, x, y, width, height, bw,
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BlackPixel(dpy,DefaultScreen(dpy)),
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WhitePixel(dpy,DefaultScreen(dpy)));
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/*
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t->w = XCreateWindow(dpy, parent, x, y, width, height, bw, 0,
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CopyFromParent, CopyFromParent, 0, 0);
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*/
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if (t->w == 0)
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return(NULL);
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XMapWindow(dpy, t->w);
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if ((t->f = XLoadQueryFont(dpy, fontname)) == 0)
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return(NULL);
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/* if (!t->f.fixedwidth) check for fixedwidth later
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return(NULL); */
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t->gc = XCreateGC(dpy,t->w,0,NULL);
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XCopyGC(dpy, gc, ~0L, t->gc);
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XSetFont(dpy, t->gc, t->f->fid);
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XSetFunction(dpy, t->gc, GXcopy);
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t->nc = (width - LEFTMAR) /
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Width(t->f); /* number of columns */
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t->nr = height /
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Height(t->f); /* number of rows */
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if (t->nc < 1 || t->nr < 1)
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return(NULL);
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if ((t->lp = (char **)calloc(t->nr, sizeof(char *))) == NULL)
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return(NULL);
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for (i = 0; i < t->nr; i++)
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if ((t->lp[i] = calloc(t->nc+1, 1)) == NULL)
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return(NULL);
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t->r = t->c = 0;
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t->cursor = TNOCURS;
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return(t);
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}
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xt_puts(s, t) /* output a string */
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register char *s;
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TEXTWIND *t;
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{
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int oldcurs;
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oldcurs = xt_cursor(t, TNOCURS); /* for efficiency */
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while (*s)
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xt_putc(*s++, t);
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xt_cursor(t, oldcurs);
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}
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xt_putc(c, t) /* output a character */
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char c;
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register TEXTWIND *t;
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{
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checkcurs(t);
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switch (c) {
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case '\n':
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if (t->r >= t->nr - 1)
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xt_delete(t, 0); /* scroll up 1 line */
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else if (t->r < t->nr - 1)
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t->r++;
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/* fall through */
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case '\r':
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t->c = 0;
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break;
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case '\b':
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while (t->c < 1 && t->r > 0)
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t->c = strlen(t->lp[--t->r]);
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if (t->c > 0)
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t->c--;
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break;
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default:
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if (t->c >= t->nc)
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xt_putc('\n', t);
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XDrawImageString(t->dpy, t->w, t->gc, LEFTMAR+t->c*Width(t->f),
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YStart(t->f)+t->r*Height(t->f), &c, 1);
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t->lp[t->r][t->c++] = c;
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break;
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}
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restorecurs(t);
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}
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xt_delete(t, r) /* delete a line */
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register TEXTWIND *t;
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int r;
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{
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char *cp;
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register int i;
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if (r < 0 || r >= t->nr)
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return;
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checkcurs(t);
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/* move lines */
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XCopyArea(t->dpy, t->w, t->w, t->gc, LEFTMAR, (r+1)*Height(t->f),
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t->nc*Width(t->f), (t->nr-1-r)*Height(t->f),
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LEFTMAR, r*Height(t->f));
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cp = t->lp[r];
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for (i = r; i < t->nr-1; i++)
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t->lp[i] = t->lp[i+1];
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t->lp[t->nr-1] = cp;
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/* clear bottom */
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XClearArea(t->dpy, t->w, LEFTMAR, (t->nr-1)*Height(t->f),
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t->nc*Width(t->f), Height(t->f),(Bool) 0);
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bzero(cp, t->nc);
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restorecurs(t); /* should we reposition cursor? */
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}
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xt_insert(t, r) /* insert a line */
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register TEXTWIND *t;
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int r;
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{
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char *cp;
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register int i;
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if (r < 0 || r >= t->nr)
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return;
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checkcurs(t);
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/* move lines */
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XCopyArea(t->dpy, t->w, t->w, t->gc, LEFTMAR, r*Height(t->f), LEFTMAR,
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(r+1)*Height(t->f), t->nc*Width(t->f),
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(t->nr-1-r)*Height(t->f));
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cp = t->lp[t->nr-1];
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for (i = t->nr-1; i > r; i--)
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t->lp[i] = t->lp[i-1];
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t->lp[r] = cp;
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/* clear new line */
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XClearArea(t->dpy, t->w, LEFTMAR, r*Height(t->f),
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t->nc*Width(t->f), Height(t->f), (Bool) 0);
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bzero(cp, t->nc);
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restorecurs(t); /* should we reposition cursor? */
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}
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xt_redraw(t) /* redraw text window */
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register TEXTWIND *t;
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{
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register int i;
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XClearWindow(t->dpy, t->w);
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for (i = 0; i < t->nr; i++)
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if (strlen(t->lp[i]) > 0)
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XDrawImageString(t->dpy, t->w, t->gc, LEFTMAR,
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YStart(t->f)+i*Height(t->f),
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t->lp[i], strlen(t->lp[i]));
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restorecurs(t);
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}
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xt_clear(t) /* clear text window */
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register TEXTWIND *t;
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{
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register int i;
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XClearWindow(t->dpy, t->w);
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for (i = 0; i < t->nr; i++)
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bzero(t->lp[i], t->nc);
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t->r = t->c = 0;
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restorecurs(t);
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}
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xt_move(t, r, c) /* move to new position */
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register TEXTWIND *t;
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int r, c;
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{
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if (r < 0 || c < 0 || r >= t->nr || c >= t->nc)
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return;
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checkcurs(t);
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t->r = r;
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t->c = c;
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restorecurs(t);
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}
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int
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xt_cursor(t, curs) /* change cursor */
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register TEXTWIND *t;
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register int curs;
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{
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register int oldcurs;
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if (curs != TNOCURS && curs != TBLKCURS)
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return(-1);
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oldcurs = t->cursor;
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if (curs != oldcurs)
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togglecurs(t);
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t->cursor = curs;
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return(oldcurs);
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}
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xt_close(t) /* close text window */
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register TEXTWIND *t;
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{
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register int i;
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XFreeFont(t->dpy, t->f);
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XFreeGC(t->dpy,t->gc);
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XDestroyWindow(t->dpy, t->w);
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for (i = 0; i < t->nr; i++)
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free(t->lp[i]);
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free((char *)t->lp);
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free((char *)t);
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}
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static
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togglecurs(t)
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register TEXTWIND *t;
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{
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XSetFunction(t->dpy, t->gc, GXinvert);
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XSetPlaneMask(t->dpy, t->gc, 1L);
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XFillRectangle(t->dpy, t->w, t->gc,
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t->c*Width(t->f)+LEFTMAR, t->r*Height(t->f),
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Width(t->f), Height(t->f));
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XSetFunction(t->dpy, t->gc, GXcopy);
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XSetPlaneMask(t->dpy, t->gc, ~0L);
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}
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