1 /* 2 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 7 /* All Rights Reserved */ 8 9 /* 10 * Copyright (c) 1980 Regents of the University of California. 11 * All rights reserved. The Berkeley software License Agreement 12 * specifies the terms and conditions for redistribution. 13 */ 14 15 #pragma ident "%Z%%M% %I% %E% SMI" 16 17 /*LINTLIBRARY*/ 18 19 #ifndef lint 20 static char 21 sccsid[] = "@(#)newwin.c 1.7 89/07/13 SMI"; /* from UCB 5.1 85/06/07 */ 22 #endif /* not lint */ 23 24 /* 25 * allocate space for and set up defaults for a new window 26 * 27 */ 28 29 #include "curses.ext" 30 #include <malloc.h> 31 32 #define SMALLOC (short *)malloc 33 34 /* forward declaration */ 35 static WINDOW *makenew(int, int, int, int); 36 37 #undef nl /* don't need it here, and it interferes */ 38 39 WINDOW * 40 newwin(int num_lines, int num_cols, int begy, int begx) 41 { 42 WINDOW *win; 43 char *sp; 44 int i, by, bx, nl, nc; 45 int j; 46 47 by = begy; 48 bx = begx; 49 nl = num_lines; 50 nc = num_cols; 51 52 if (nl == 0) 53 nl = LINES - by; 54 if (nc == 0) 55 nc = COLS - bx; 56 if ((win = makenew(nl, nc, by, bx)) == NULL) 57 return (ERR); 58 if ((win->_firstch = SMALLOC(nl * sizeof (win->_firstch[0]))) == NULL) { 59 free(win->_y); 60 free(win); 61 return (NULL); 62 } 63 if ((win->_lastch = SMALLOC(nl * sizeof (win->_lastch[0]))) == NULL) { 64 free(win->_y); 65 free(win->_firstch); 66 free(win); 67 return (NULL); 68 } 69 win->_nextp = win; 70 for (i = 0; i < nl; i++) { 71 win->_firstch[i] = _NOCHANGE; 72 win->_lastch[i] = _NOCHANGE; 73 } 74 for (i = 0; i < nl; i++) 75 if ((win->_y[i] = malloc(nc * sizeof (win->_y[0]))) == NULL) { 76 for (j = 0; j < i; j++) 77 free(win->_y[j]); 78 free(win->_firstch); 79 free(win->_lastch); 80 free(win->_y); 81 free(win); 82 return (ERR); 83 } 84 else 85 for (sp = win->_y[i]; sp < win->_y[i] + nc; ) 86 *sp++ = ' '; 87 win->_ch_off = 0; 88 #ifdef DEBUG 89 fprintf(outf, "NEWWIN: win->_ch_off = %d\n", win->_ch_off); 90 #endif 91 return (win); 92 } 93 94 WINDOW * 95 subwin(WINDOW *orig, int num_lines, int num_cols, int begy, int begx) 96 { 97 WINDOW *win; 98 int by, bx, nl, nc; 99 100 by = begy; 101 bx = begx; 102 nl = num_lines; 103 nc = num_cols; 104 105 /* 106 * make sure window fits inside the original one 107 */ 108 #ifdef DEBUG 109 fprintf(outf, "SUBWIN(%0.2o, %d, %d, %d, %d)\n", orig, nl, nc, by, bx); 110 #endif 111 if (by < orig->_begy || bx < orig->_begx || 112 by + nl > orig->_maxy + orig->_begy || 113 bx + nc > orig->_maxx + orig->_begx) 114 return (ERR); 115 if (nl == 0) 116 nl = orig->_maxy + orig->_begy - by; 117 if (nc == 0) 118 nc = orig->_maxx + orig->_begx - bx; 119 if ((win = makenew(nl, nc, by, bx)) == NULL) 120 return (ERR); 121 win->_nextp = orig->_nextp; 122 orig->_nextp = win; 123 win->_orig = orig; 124 _set_subwin_(orig, win); 125 return (win); 126 } 127 128 /* 129 * this code is shared with mvwin() 130 */ 131 132 void 133 _set_subwin_(WINDOW *orig, WINDOW *win) 134 { 135 int i, j, k; 136 137 j = win->_begy - orig->_begy; 138 k = win->_begx - orig->_begx; 139 win->_ch_off = (short)k; 140 #ifdef DEBUG 141 fprintf(outf, "_SET_SUBWIN_: win->_ch_off = %d\n", win->_ch_off); 142 #endif 143 win->_firstch = &orig->_firstch[j]; 144 win->_lastch = &orig->_lastch[j]; 145 for (i = 0; i < win->_maxy; i++, j++) 146 win->_y[i] = &orig->_y[j][k]; 147 148 } 149 150 /* 151 * This routine sets up a window buffer and returns a pointer to it. 152 */ 153 154 static WINDOW * 155 makenew(int num_lines, int num_cols, int begy, int begx) 156 { 157 WINDOW *win; 158 int by, bx, nl, nc; 159 160 by = begy; 161 bx = begx; 162 nl = num_lines; 163 nc = num_cols; 164 165 #ifdef DEBUG 166 fprintf(outf, "MAKENEW(%d, %d, %d, %d)\n", nl, nc, by, bx); 167 #endif 168 if ((win = (WINDOW *) malloc(sizeof (*win))) == NULL) 169 return (NULL); 170 #ifdef DEBUG 171 fprintf(outf, "MAKENEW: nl = %d\n", nl); 172 #endif 173 if ((win->_y = (char **)malloc(nl * sizeof (win->_y[0]))) == NULL) { 174 free(win); 175 return (NULL); 176 } 177 #ifdef DEBUG 178 fprintf(outf, "MAKENEW: nc = %d\n", nc); 179 #endif 180 win->_cury = win->_curx = 0; 181 win->_clear = FALSE; 182 win->_maxy = (short)nl; 183 win->_maxx = (short)nc; 184 win->_begy = (short)by; 185 win->_begx = (short)bx; 186 win->_flags = 0; 187 win->_scroll = win->_leave = FALSE; 188 _swflags_(win); 189 win->_orig = NULL; 190 #ifdef DEBUG 191 fprintf(outf, "MAKENEW: win->_clear = %d\n", win->_clear); 192 fprintf(outf, "MAKENEW: win->_leave = %d\n", win->_leave); 193 fprintf(outf, "MAKENEW: win->_scroll = %d\n", win->_scroll); 194 fprintf(outf, "MAKENEW: win->_flags = %0.2o\n", win->_flags); 195 fprintf(outf, "MAKENEW: win->_maxy = %d\n", win->_maxy); 196 fprintf(outf, "MAKENEW: win->_maxx = %d\n", win->_maxx); 197 fprintf(outf, "MAKENEW: win->_begy = %d\n", win->_begy); 198 fprintf(outf, "MAKENEW: win->_begx = %d\n", win->_begx); 199 #endif 200 return (win); 201 } 202 203 void 204 _swflags_(WINDOW *win) 205 { 206 win->_flags &= ~(_ENDLINE|_FULLLINE|_FULLWIN|_SCROLLWIN); 207 if (win->_begx + win->_maxx == COLS) { 208 win->_flags |= _ENDLINE; 209 if (win->_begx == 0) { 210 if (AL && DL) 211 win->_flags |= _FULLLINE; 212 if (win->_maxy == LINES && win->_begy == 0) 213 win->_flags |= _FULLWIN; 214 } 215 if (win->_begy + win->_maxy == LINES) 216 win->_flags |= _SCROLLWIN; 217 } 218 } 219
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