1 /* 2 * make the current screen look like "win" over the area coverd by 3 * win. 4 * 5 * 02/17/82 (Berkeley) @(#)refresh.c 1.5 6 */ 7 8 # include "curses.ext" 9 10 # ifdef DEBUG 11 # define STATIC 12 # else 13 # define STATIC static 14 # endif 15 16 STATIC short ly, lx; 17 18 STATIC bool curwin; 19 20 WINDOW *_win = NULL; 21 22 wrefresh(win) 23 reg WINDOW *win; 24 { 25 reg short wy; 26 reg int retval; 27 28 /* 29 * make sure were in visual state 30 */ 31 if (_endwin) { 32 _puts(VS); 33 _puts(TI); 34 _endwin = FALSE; 35 } 36 37 /* 38 * initialize loop parameters 39 */ 40 41 ly = curscr->_cury; 42 lx = curscr->_curx; 43 wy = 0; 44 _win = win; 45 curwin = (win == curscr); 46 47 if (win->_clear || curscr->_clear || curwin) { 48 if ((win->_flags & _FULLWIN) || curscr->_clear) { 49 _puts(CL); 50 ly = lx = curscr->_curx = curscr->_cury = 0; 51 curscr->_clear = FALSE; 52 if (!curwin) 53 werase(curscr); 54 touchwin(win); 55 } 56 win->_clear = FALSE; 57 } 58 if (!CA) { 59 if (win->_curx != 0) 60 putchar('\n'); 61 if (!curwin) 62 werase(curscr); 63 } 64 # ifdef DEBUG 65 fprintf(outf, "REFRESH(%0.2o): curwin = %d\n", win, curwin); 66 fprintf(outf, "REFRESH:\n\tfirstch\tlastch\n"); 67 # endif 68 for (wy = 0; wy < win->_maxy; wy++) { 69 # ifdef DEBUG 70 fprintf(outf, "%d\t%d\t%d\n", wy, win->_firstch[wy], win->_lastch[wy]); 71 # endif 72 if (win->_firstch[wy] != _NOCHANGE) 73 if (makech(win, wy) == ERR) 74 return ERR; 75 else 76 win->_firstch[wy] = _NOCHANGE; 77 } 78 if (win->_leave) { 79 curscr->_cury = ly; 80 curscr->_curx = lx; 81 ly -= win->_begy; 82 lx -= win->_begx; 83 if (ly >= 0 && ly < win->_maxy && lx >= 0 && lx < win->_maxx) { 84 win->_cury = ly; 85 win->_curx = lx; 86 } 87 else 88 win->_cury = win->_curx = 0; 89 } 90 else { 91 mvcur(ly, lx, win->_cury + win->_begy, win->_curx + win->_begx); 92 curscr->_cury = win->_cury + win->_begy; 93 curscr->_curx = win->_curx + win->_begx; 94 } 95 retval = OK; 96 ret: 97 _win = NULL; 98 fflush(stdout); 99 return retval; 100 } 101 102 /* 103 * make a change on the screen 104 */ 105 STATIC 106 makech(win, wy) 107 reg WINDOW *win; 108 short wy; 109 { 110 reg char *nsp, *csp, *ce; 111 reg short wx, lch, y; 112 reg int nlsp, clsp; /* last space in lines */ 113 114 wx = win->_firstch[wy]; 115 y = wy + win->_begy; 116 lch = win->_lastch[wy]; 117 if (curwin) 118 csp = " "; 119 else 120 csp = &curscr->_y[wy + win->_begy][wx + win->_begx]; 121 nsp = &win->_y[wy][wx]; 122 if (CE && !curwin) { 123 for (ce = &win->_y[wy][win->_maxx - 1]; *ce == ' '; ce--) 124 if (ce <= win->_y[wy]) 125 break; 126 nlsp = ce - win->_y[wy]; 127 } 128 if (!curwin) 129 ce = CE; 130 else 131 ce = NULL; 132 while (wx <= lch) { 133 if (*nsp != *csp) { 134 mvcur(ly, lx, y, wx + win->_begx); 135 # ifdef DEBUG 136 fprintf(outf, "MAKECH: 1: wx = %d, lx = %d\n", wx, lx); 137 # endif 138 ly = y; 139 lx = wx + win->_begx; 140 while (*nsp != *csp && wx <= lch) { 141 if (ce != NULL && wx >= nlsp && *nsp == ' ') { 142 /* 143 * check for clear to end-of-line 144 */ 145 ce = &curscr->_y[ly][COLS - 1]; 146 while (*ce == ' ') 147 if (ce-- <= csp) 148 break; 149 clsp = ce - curscr->_y[ly] - win->_begx; 150 # ifdef DEBUG 151 fprintf(outf, "MAKECH: clsp = %d, nlsp = %d\n", clsp, nlsp); 152 # endif 153 if (clsp - nlsp >= strlen(CE) 154 && clsp < win->_maxx) { 155 # ifdef DEBUG 156 fprintf(outf, "MAKECH: using CE\n"); 157 # endif 158 _puts(CE); 159 lx = wx + win->_begx; 160 while (wx++ <= clsp) 161 *csp++ = ' '; 162 goto ret; 163 } 164 ce = NULL; 165 } 166 /* 167 * enter/exit standout mode as appropriate 168 */ 169 if (SO && (*nsp&_STANDOUT) != (curscr->_flags&_STANDOUT)) { 170 if (*nsp & _STANDOUT) { 171 _puts(SO); 172 curscr->_flags |= _STANDOUT; 173 } 174 else { 175 _puts(SE); 176 curscr->_flags &= ~_STANDOUT; 177 } 178 } 179 wx++; 180 if (wx >= win->_maxx && wy == win->_maxy - 1) 181 if (win->_scroll) { 182 if ((win->_flags&(_ENDLINE|_STANDOUT)) == (_ENDLINE|_STANDOUT)) 183 if (!MS) { 184 _puts(SE); 185 win->_flags &= ~_STANDOUT; 186 } 187 if (!curwin) 188 putchar((*csp = *nsp) & 0177); 189 else 190 putchar(*nsp & 0177); 191 scroll(win); 192 if (win->_flags&_FULLWIN && !curwin) 193 scroll(curscr); 194 ly = win->_begy+win->_cury; 195 lx = win->_begx+win->_curx; 196 return OK; 197 } 198 else if (win->_flags&_SCROLLWIN) { 199 lx = --wx; 200 return ERR; 201 } 202 if (!curwin) 203 putchar((*csp++ = *nsp) & 0177); 204 else 205 putchar(*nsp & 0177); 206 if (UC && (*nsp & _STANDOUT)) { 207 putchar('\b'); 208 _puts(UC); 209 } 210 nsp++; 211 } 212 if (!MS && (*nsp & _STANDOUT) && (*csp & _STANDOUT)) { 213 _puts(SE); 214 win->_flags &= ~_STANDOUT; 215 } 216 # ifdef DEBUG 217 fprintf(outf, "MAKECH: 2: wx = %d, lx = %d\n", wx, lx); 218 # endif 219 if (lx == wx + win->_begx) /* if no change */ 220 break; 221 lx = wx + win->_begx; 222 } 223 else if (wx < lch) 224 while (*nsp == *csp) { 225 nsp++; 226 if (!curwin) 227 csp++; 228 ++wx; 229 } 230 else 231 break; 232 # ifdef DEBUG 233 fprintf(outf, "MAKECH: 3: wx = %d, lx = %d\n", wx, lx); 234 # endif 235 } 236 ret: 237 if ((win->_flags & _STANDOUT) && !MS) { 238 _puts(SE); 239 win->_flags &= ~_STANDOUT; 240 } 241 return OK; 242 } 243