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#ifndef lint |
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static const char RCSid[] = "$Id: x11twind.c,v 2.10 2024/05/23 22:45:05 greg Exp $"; |
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#endif |
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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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|
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#include "copyright.h" |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <X11/Xlib.h> |
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|
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#include "x11twind.h" |
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|
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#define checkcurs(t) if ((t)->cursor) togglecurs(t) |
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|
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#define restorecurs checkcurs |
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|
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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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|
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static void togglecurs(TEXTWIND *t); |
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|
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|
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TEXTWIND * |
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xt_open( |
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Display *dpy, |
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Window parent, |
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int x, int y, |
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int width, int height, |
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int bw, |
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unsigned long fore, unsigned long back, |
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char *fontname |
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) |
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{ |
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int i; |
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TEXTWIND *t; |
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|
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if ((t = (TEXTWIND *)malloc(sizeof(TEXTWIND))) == NULL) |
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return(NULL); |
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|
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t->dpy = dpy; |
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t->w = XCreateSimpleWindow(dpy, parent, x, y, width, height, |
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bw, fore, back); |
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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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|
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if ((t->f = XLoadQueryFont(dpy, fontname)) == 0) |
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return(NULL); |
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|
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/* if (!t->f.fixedwidth) check for fixedwidth later |
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return(NULL); */ |
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|
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t->gc = XCreateGC(dpy,t->w,0,NULL); |
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XSetState(dpy, t->gc, fore, back, GXcopy, AllPlanes); |
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XSetFont(dpy, t->gc, t->f->fid); |
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|
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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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} |
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|
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|
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void |
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xt_putc( /* output a character */ |
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int c, |
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TEXTWIND *t |
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) |
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{ |
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char ch[2]; |
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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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ch[0] = c; ch[1] = '\0'; |
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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), ch, 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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|
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|
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void |
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xt_puts(const char *s, TEXTWIND *t) /* output a string */ |
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{ |
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int oldcurs; |
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|
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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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|
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|
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void |
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xt_delete( /* delete a line */ |
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TEXTWIND *t, |
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int r |
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) |
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{ |
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char *cp; |
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int i; |
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|
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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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|
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memset(cp, '\0', t->nc); |
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restorecurs(t); /* should we reposition cursor? */ |
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} |
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|
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|
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void |
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xt_insert( /* insert a line */ |
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TEXTWIND *t, |
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int r |
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) |
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{ |
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char *cp; |
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int i; |
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|
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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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memset(cp, '\0', t->nc); |
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restorecurs(t); /* should we reposition cursor? */ |
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} |
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|
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|
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void |
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xt_redraw(TEXTWIND *t) /* redraw text window */ |
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{ |
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int i; |
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|
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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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|
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|
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void |
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xt_clear(TEXTWIND *t) /* clear text window */ |
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{ |
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int i; |
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|
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XClearWindow(t->dpy, t->w); |
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for (i = 0; i < t->nr; i++) |
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memset(t->lp[i], '\0', 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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|
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|
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void |
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xt_move( /* move to new position */ |
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TEXTWIND *t, |
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int r, int c |
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) |
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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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|
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|
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int |
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xt_cursor( /* change cursor */ |
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TEXTWIND *t, |
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int curs |
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) |
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{ |
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int oldcurs; |
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|
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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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|
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|
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void |
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xt_close(TEXTWIND *t) /* close text window */ |
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{ |
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int i; |
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|
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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((void *)t->lp); |
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free((void *)t); |
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} |
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|
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|
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static void |
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togglecurs(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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} |
