projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| a43a8870 | 1 | #ifndef lint |
| 861cd1ed | 2 | static char *sccsid = "@(#)wwclreol.c 3.5 83/08/16"; |
| a43a8870 EW |
3 | #endif |
| 4 | ||
| 5 | #include "ww.h" | |
| e908bfac | 6 | #include "tt.h" |
| a43a8870 | 7 | |
| 14f251df EW |
8 | wwclreol(w, line, col) |
| 9 | struct ww *w; | |
| 10 | { | |
| 11 | wwclreol1(w, line, col, 0); | |
| 12 | } | |
| 13 | ||
| a43a8870 EW |
14 | /* |
| 15 | * Clear w to the end of line. | |
| 16 | * If cleared is true, then the screen line has already been cleared | |
| 17 | * previously. | |
| 18 | */ | |
| 14f251df | 19 | wwclreol1(w, line, col, cleared) |
| a43a8870 | 20 | register struct ww *w; |
| 14f251df EW |
21 | int line, col; |
| 22 | char cleared; | |
| a43a8870 EW |
23 | { |
| 24 | register i; | |
| 25 | int row = line - w->ww_scroll; | |
| 26 | int srow = w->ww_w.t + row; | |
| 27 | int scol = w->ww_w.l + col; | |
| 28 | register union ww_char *s, *buf; | |
| 29 | register char *smap, *win; | |
| 861cd1ed | 30 | char *touched; |
| a43a8870 EW |
31 | int nblank, ncleared; |
| 32 | ||
| 33 | if (row < 0 || row >= w->ww_w.nr) { | |
| 34 | /* can't even see it, so just clear the buffer */ | |
| 35 | buf = &w->ww_buf[line][col]; | |
| 36 | for (i = w->ww_w.nc - col; --i >= 0;) | |
| 37 | buf++->c_w = ' '; | |
| 38 | return; | |
| 39 | } | |
| 40 | smap = &wwsmap[srow][scol]; | |
| 41 | s = &wwns[srow][scol]; | |
| 861cd1ed | 42 | touched = &wwtouched[srow]; |
| a43a8870 EW |
43 | win = &w->ww_win[row][col]; |
| 44 | buf = &w->ww_buf[row][col]; | |
| 45 | ncleared = nblank = 0; | |
| 46 | for (i = w->ww_w.nc - col; --i >= 0;) { | |
| 47 | if (*smap++ != w->ww_index) { | |
| 48 | if (s++->c_w == ' ') | |
| 49 | nblank++; | |
| 50 | buf++; | |
| 51 | win++; | |
| 52 | continue; | |
| 53 | } | |
| 54 | ncleared++; | |
| 55 | buf++->c_w = ' '; | |
| 861cd1ed | 56 | *touched = 1; |
| a43a8870 EW |
57 | if (*win == 0) { |
| 58 | nblank++; | |
| 59 | s++->c_w = ' '; | |
| 60 | win++; | |
| 61 | } else | |
| 62 | s++->c_w = ' ' | *win++ << WWC_MSHIFT; | |
| 63 | } | |
| 64 | if (!cleared && tt.tt_clreol != 0 | |
| 65 | && ncleared > wwncol - scol - nblank | |
| 66 | && nblank > (wwncol - scol) / 2) { | |
| 67 | /* clear to the end */ | |
| 68 | (*tt.tt_move)(srow, scol); | |
| 69 | (*tt.tt_clreol)(); | |
| 70 | s = &wwos[srow][scol]; | |
| b1db5e4e | 71 | for (i = wwncol - scol; --i >= 0;) |
| a43a8870 EW |
72 | s++->c_w = ' '; |
| 73 | } | |
| 74 | } |