| 1 | #ifndef lint |
| 2 | static char sccsid[] = "@(#)wwinsline.c 3.7 %G%"; |
| 3 | #endif |
| 4 | |
| 5 | /* |
| 6 | * Copyright (c) 1983 Regents of the University of California, |
| 7 | * All rights reserved. Redistribution permitted subject to |
| 8 | * the terms of the Berkeley Software License Agreement. |
| 9 | */ |
| 10 | |
| 11 | #include "ww.h" |
| 12 | |
| 13 | wwinsline(w, row) |
| 14 | register struct ww *w; |
| 15 | int row; |
| 16 | { |
| 17 | register i; |
| 18 | register union ww_char **cpp, **cqq; |
| 19 | register union ww_char *cp; |
| 20 | int row1, row2; |
| 21 | char deleted; |
| 22 | int visible; |
| 23 | |
| 24 | /* |
| 25 | * Scroll first. |
| 26 | */ |
| 27 | if ((row1 = row) < w->ww_i.t) { |
| 28 | row1 = w->ww_i.t; |
| 29 | visible = 0; |
| 30 | } else |
| 31 | visible = 1; |
| 32 | if ((row2 = w->ww_b.b) > w->ww_i.b) { |
| 33 | row2 = w->ww_i.b; |
| 34 | } |
| 35 | deleted = wwscroll1(w, row1, row2, -1, visible); |
| 36 | |
| 37 | /* |
| 38 | * Fix the buffer. |
| 39 | * But leave clearing the last line for wwclreol(). |
| 40 | */ |
| 41 | cpp = &w->ww_buf[w->ww_b.b]; |
| 42 | cqq = cpp - 1; |
| 43 | cp = *cqq; |
| 44 | for (i = w->ww_b.b - row; --i > 0;) |
| 45 | *--cpp = *--cqq; |
| 46 | *cqq = cp; |
| 47 | |
| 48 | /* |
| 49 | * Now clear the last line. |
| 50 | */ |
| 51 | if (visible) |
| 52 | wwclreol1(w, row, w->ww_b.l, deleted); |
| 53 | else |
| 54 | for (i = w->ww_b.nc; --i >= 0;) |
| 55 | cp++->c_w = ' '; |
| 56 | } |