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| 1 : | anton | 1.1 | \ Forth output paging add-on (like more(1)) |
| 2 : | |||
| 3 : | anton | 1.4 | \ Copyright (C) 1996,2000,2003 Free Software Foundation, Inc. |
| 4 : | anton | 1.1 | |
| 5 : | \ This file is part of Gforth. | ||
| 6 : | |||
| 7 : | \ Gforth is free software; you can redistribute it and/or | ||
| 8 : | \ modify it under the terms of the GNU General Public License | ||
| 9 : | anton | 1.5 | \ as published by the Free Software Foundation, either version 3 |
| 10 : | anton | 1.1 | \ of the License, or (at your option) any later version. |
| 11 : | |||
| 12 : | \ This program is distributed in the hope that it will be useful, | ||
| 13 : | \ but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 : | \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 15 : | \ GNU General Public License for more details. | ||
| 16 : | |||
| 17 : | \ You should have received a copy of the GNU General Public License | ||
| 18 : | anton | 1.5 | \ along with this program. If not, see http://www.gnu.org/licenses/. |
| 19 : | anton | 1.1 | |
| 20 : | |||
| 21 : | \ This add-on is for those poor souls whose terminals cannot scroll | ||
| 22 : | \ back but who want to read the output of 'words' at their leisure. | ||
| 23 : | |||
| 24 : | \ currently this is very primitive: it just counts newlines, and only | ||
| 25 : | \ allows continuing for another page (and of course, terminating | ||
| 26 : | \ processing by sending a signal (^C)) | ||
| 27 : | |||
| 28 : | \ Some things to do: | ||
| 29 : | \ allow continuing for one line (Enter) | ||
| 30 : | \ count lines produced by wraparound (note tabs and backspaces) | ||
| 31 : | \ allow continuing silently | ||
| 32 : | \ fancy features like searching, scrollback etc. | ||
| 33 : | |||
| 34 : | \ one more-or-less simple way to achieve all this is to | ||
| 35 : | \ popen("less","w") and output there. Before getting the next `key`, | ||
| 36 : | \ we would perform a pclose. This idea due to Marcel Hendrix. | ||
| 37 : | |||
| 38 : | require termsize.fs | ||
| 39 : | |||
| 40 : | variable last-#lines 0 last-#lines ! | ||
| 41 : | |||
| 42 : | :noname ( -- c ) | ||
| 43 : | 1 last-#lines ! | ||
| 44 : | defers key ; | ||
| 45 : | is key | ||
| 46 : | |||
| 47 : | :noname ( c -- ) | ||
| 48 : | dup defers emit | ||
| 49 : | #lf = | ||
| 50 : | if | ||
| 51 : | 1 last-#lines +! | ||
| 52 : | last-#lines @ rows >= | ||
| 53 : | if | ||
| 54 : | ." ... more ?" key drop 10 backspaces 10 spaces 10 backspaces | ||
| 55 : | endif | ||
| 56 : | endif ; | ||
| 57 : | is emit | ||
| 58 : | |||
| 59 : | :noname ( c-addr u -- ) | ||
| 60 : | bounds | ||
| 61 : | ?DO | ||
| 62 : | I c@ emit | ||
| 63 : | LOOP ; | ||
| 64 : | is type |
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