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/* Copyright (c) 1987 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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|
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/* |
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* xtwind.c - routines for X text windows. |
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* |
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* 10/30/87 |
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*/ |
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|
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#include <stdio.h> |
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|
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#include <X/Xlib.h> |
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|
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#include "xtwind.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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#define togglecurs(t) XPixFill((t)->w, (t)->c*(t)->f.width+LEFTMAR, \ |
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(t)->r*(t)->f.height, (t)->f.width, \ |
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(t)->f.height, 0, 0, GXinvert, 1) |
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|
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extern char *calloc(), *malloc(); |
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|
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|
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TEXTWIND * |
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xt_open(parent, x, y, width, height, border, fontname) |
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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 border; |
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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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|
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if ((t = (TEXTWIND *)malloc(sizeof(TEXTWIND))) == NULL) |
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return(NULL); |
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t->w = XCreateWindow(parent, x, y, width, height, |
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border, BlackPixmap, WhitePixmap); |
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if (t->w == 0) |
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return(NULL); |
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XMapWindow(t->w); |
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if ((i = XGetFont(fontname)) == 0) |
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return(NULL); |
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if (XQueryFont(i, &t->f) == 0) |
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return(NULL); |
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if (!t->f.fixedwidth) |
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return(NULL); |
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t->nc = (width - LEFTMAR) / t->f.width; |
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t->nr = height / t->f.height; |
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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+1, 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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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 = xt_cursor(t, TNOCURS); |
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|
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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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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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int oldcurs = xt_cursor(t, TNOCURS); |
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|
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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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XText(t->w, LEFTMAR + t->c*t->f.width, t->r*t->f.height, |
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&c, 1, t->f.id, BlackPixel, WhitePixel); |
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t->lp[t->r][t->c++] = c; |
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break; |
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} |
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xt_cursor(t, oldcurs); |
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} |
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|
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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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|
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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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XMoveArea(t->w, LEFTMAR, (r+1)*t->f.height, LEFTMAR, r*t->f.height, |
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t->nc*t->f.width, (t->nr-1-r)*t->f.height); |
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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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XPixSet(t->w, LEFTMAR, (t->nr-1)*t->f.height, |
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t->nc*t->f.width, t->f.height, WhitePixel); |
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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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|
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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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|
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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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XMoveArea(t->w, LEFTMAR, r*t->f.height, LEFTMAR, (r+1)*t->f.height, |
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t->nc*t->f.width, (t->nr-1-r)*t->f.height); |
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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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XPixSet(t->w, LEFTMAR, r*t->f.height, |
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t->nc*t->f.width, t->f.height, WhitePixel); |
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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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|
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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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|
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checkcurs(t); |
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XClear(t->w); |
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for (i = 0; i < t->nr; i++) |
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XText(t->w, LEFTMAR, i*t->f.height, t->lp[i], strlen(t->lp[i]), |
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t->f.id, BlackPixel, WhitePixel); |
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restorecurs(t); |
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} |
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|
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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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|
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checkcurs(t); |
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XClear(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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|
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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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|
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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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|
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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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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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|
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XFreeFont(t->f.id); |
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XDestroyWindow(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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} |
