├── .gitignore ├── .travis.yml ├── LICENSE ├── Makefile ├── README.md ├── build.fth ├── fmacs.sh ├── install-deps.sh ├── shippable.yml ├── src ├── bindings.fth ├── display.fth ├── fmacs.fth ├── format.fth ├── keymap.fth ├── kill.fth ├── minibuffer.fth ├── point.fth ├── text.fth ├── tty.fth ├── vt100.fth └── window.fth └── wercker.yml /.gitignore: -------------------------------------------------------------------------------- 1 | *~ 2 | /fmacs 3 | -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | language: c 2 | sudo: required 3 | install: sh -e install-deps.sh 4 | script: make check 5 | notifications: 6 | email: lars@nocrew.org 7 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | FORTH = forth 2 | SRC = $(wildcard src/*.fth) 3 | 4 | all: fmacs 5 | 6 | fmacs: $(SRC) 7 | $(FORTH) < build.fth | grep Build-OK 8 | chmod a+x $@ 9 | 10 | check: fmacs 11 | printf '\030\003' | ./fmacs | grep scratch 12 | 13 | clean: 14 | rm -f fmacs 15 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | Possibly a clone of Emacs, written in Forth. 2 | [![Build Status](https://travis-ci.org/larsbrinkhoff/fmacs.svg?branch=travis)](https://travis-ci.org/larsbrinkhoff/fmacs) 3 | [![Build Status](https://app.wercker.com/status/49e81e84322987ebfe902c5ab09c832e/s/master "wercker status")](https://app.wercker.com/project/byKey/49e81e84322987ebfe902c5ab09c832e) 4 | [![Build Status](https://api.shippable.com/projects/57e5100f7d2e3611000c2f2f/badge?branch=master)](https://app.shippable.com/projects/57e5100f7d2e3611000c2f2f) 5 | 6 | ### Limitations 7 | - Only runs in [lbForth](http://github.com/larsbrinkhoff/lbForth). 8 | - It's a block editor, i.e. it's fixed to 16 lines by 64 characters. 9 | 10 | ### Installation 11 | - Either load it into a running Forth (which the `fmacs.sh` script does), 12 | - Or build a standalone executable with `make`. 13 | 14 | ### Key bindings 15 | - `M-:` - Evaluate a Forth expression. 16 | - `M-x` - Execute extended command. 17 | - `C-f`, `C-b`, `C-p`, `C-n` - Cursor movement. 18 | - `M-f`, `M-b` - Move forward/backward by word. 19 | - `C-a`, `C-e` - Go to beginning/end of line. 20 | - `M-<`, `M->` - Go to beginning/end of buffer. 21 | - `C-d`, `DEL` - Delete character to the right/left. 22 | - `M-w` - Copy region to kill ring. 23 | - `M-d`, `M-DEL` - Delete word and copy to kill ring. 24 | - `C-y` - Insert text from kill ring. 25 | - `C-j`, `C-m` - Stub; does not break line. 26 | - `C-x C-f` - Stub; does not load file. 27 | - `C-h` - Stub; provide a helpful message. 28 | - `C-x u`, `C-_` - Stub; does not undo. 29 | - `C-q` - Quoted insert. 30 | - `C-g` - Quit. 31 | - `C-@`, `C-SPC` - Set mark. 32 | - `C-x C-x` - Exchange point and mark. 33 | - `C-z` - Return to Forth. Type `fmacs` to get back to Fmacs. 34 | - `C-x C-c` - Exit Forth. 35 | -------------------------------------------------------------------------------- /build.fth: -------------------------------------------------------------------------------- 1 | \ Build an fmacs executable. 2 | 3 | : h-[defined] postpone [defined] ; 4 | include lib/save-image.fth 5 | s" src/" searched 6 | include fmacs.fth 7 | ' fmacs is turnkey 8 | s" fmacs" save-image 9 | .( Build-OK ) 10 | bye 11 | -------------------------------------------------------------------------------- /fmacs.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | cd src 4 | (stty raw; echo include fmacs.fth fmacs; cat) | forth 5 | stty sane 6 | -------------------------------------------------------------------------------- /install-deps.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | FORTH=https://github.com/larsbrinkhoff/lbForth 4 | 5 | git clone $FORTH 6 | cd lbForth 7 | export M32=-m32 8 | sh -e test/install-deps.sh install_linux 9 | make TARGET=x86 OS=linux 10 | sudo make install TARGET=x86 OS=linux 11 | -------------------------------------------------------------------------------- /shippable.yml: -------------------------------------------------------------------------------- 1 | language: none 2 | build: 3 | pre_ci_boot: 4 | image_name: larsbrinkhoff/lbforth 5 | image_tag: latest 6 | pull: true 7 | ci: 8 | - forth < build.fth 9 | - chmod a+x fmacs 10 | - printf '\030\003' | ./fmacs 11 | -------------------------------------------------------------------------------- /src/bindings.fth: -------------------------------------------------------------------------------- 1 | \ Copyright 2016 Lars Brinkhoff 2 | 3 | : control ( "name" -- c ) char 31 and ; 4 | 5 | : no-find-file s" Sorry, find-file is not implemented" message ; 6 | : find-file ['] no-find-file s" Find file: " read-from-minibuffer ; 7 | : kill-emacs reset-terminal bye ; 8 | : suspend-emacs reset-terminal ." Stopped" cr also quit ; 9 | : help-prefix s" Don't panic!" message ; 10 | : extended-command 'minibuffer 4 + 50 evaluate ; 11 | : execute-extended-command ['] extended-command s" M-x " read-from-minibuffer ; 12 | 13 | ' kill-emacs control C ctl-x-map define-key 14 | ' exchange-point-and-mark control X ctl-x-map define-key 15 | ' set-mark-command control @ global-map define-key 16 | ' find-file control F ctl-x-map define-key 17 | ' execute-extended-command char x esc-map define-key 18 | 19 | variable d 20 | : "%d" ( u1 -- a u2 ) 12 swap -3 * + s" %d %d %d %d" rot /string ; 21 | : do-eval depth d ! 'minibuffer 6 + 50 evaluate depth d @ - "%d" message ; 22 | : eval-expression ['] do-eval s" Eval: " read-from-minibuffer ; 23 | ' eval-expression char : esc-map define-key 24 | 25 | ' beginning-of-line control A global-map define-key 26 | ' end-of-line control E global-map define-key 27 | ' forward-char control F global-map define-key 28 | ' forward-char char C esc-[-map define-key 29 | ' backward-char control B global-map define-key 30 | ' backward-char char D esc-[-map define-key 31 | ' kill-word char D esc-map define-key 32 | ' next-line control N global-map define-key 33 | ' next-line char B esc-[-map define-key 34 | ' previous-line control P global-map define-key 35 | ' previous-line char A esc-[-map define-key 36 | ' forward-word char f esc-map define-key 37 | ' backward-word char b esc-map define-key 38 | ' suspend-emacs control Z global-map define-key 39 | ' help-prefix control H global-map define-key 40 | ' undo control _ global-map define-key 41 | ' undo char u ctl-x-map define-key 42 | ' quoted-insert control Q global-map define-key 43 | ' keyboard-quit control G global-map define-key 44 | 45 | :noname s" C-x-" message key s" " message ctl-x-map lookup-key ; 46 | control X global-map define-key 47 | :noname s" ESC-" message key s" " message esc-map lookup-key ; 48 | control [ global-map define-key 49 | 50 | : esc-[ key esc-[-map lookup-key ; 51 | ' esc-[ char [ esc-map define-key 52 | ' esc-[ char O esc-map define-key 53 | ' beginning-of-buffer char < esc-map define-key 54 | ' end-of-buffer char > esc-map define-key 55 | ' kill-ring-save char w esc-map define-key 56 | ' yank control Y global-map define-key 57 | 58 | : define-ascii 127 32 do ['] self-insert-command i global-map define-key loop ; 59 | define-ascii 60 | 61 | ' delete-char control D global-map define-key 62 | ' newline control J global-map define-key 63 | ' newline control M global-map define-key 64 | ' delete-backward-char 127 global-map define-key 65 | ' backward-kill-word 127 esc-map define-key 66 | -------------------------------------------------------------------------------- /src/display.fth: -------------------------------------------------------------------------------- 1 | variable 'c 2 | create 'message 64 allot 3 | 4 | : x point @ 63 and ; 5 | : y point @ 6 rshift window-line @ + ; 6 | : .cursor x y at-xy ; 7 | 8 | : 0message 'message 64 blank ; 9 | 0message 10 | : message? window-line @ 16 < ; 11 | : .message message? if 0 17 at-xy 'message 63 type then ; 12 | : message format 0message 'message swap cmove .message .cursor ; 13 | 14 | : .c 'c @ c@ emit 1 'c +! ; 15 | : .line 64 0 do .c loop .nl ; 16 | : .mode .rev ." -UUU:----F1 *scratch* All (Fundamental) ---------------------" .unrev ; 17 | : .screen 0 window-line @ at-xy 'text @ 'c ! 18 | window-height @ 0 do .line loop .mode .message ; 19 | 20 | : reset-terminal restore-tty 0 17 at-xy ; 21 | : keyboard-quit s" Quit" message ; 22 | 23 | : redisplay page .screen .cursor ; 24 | -------------------------------------------------------------------------------- /src/fmacs.fth: -------------------------------------------------------------------------------- 1 | \ Copyright 2016 Lars Brinkhoff 2 | 3 | .( Fmacs isn't quite done yet ) 4 | 5 | include search.fth 6 | 7 | variable this-command 8 | variable last-command 9 | variable last-command-event 10 | variable 'text 11 | 12 | wordlist constant global-map 13 | wordlist constant ctl-x-map 14 | wordlist constant esc-map 15 | wordlist constant esc-[-map 16 | 17 | include tty.fth 18 | include vt100.fth 19 | include point.fth 20 | include format.fth 21 | include window.fth 22 | include display.fth 23 | include text.fth 24 | include kill.fth 25 | include keymap.fth 26 | include minibuffer.fth 27 | include bindings.fth 28 | 29 | : get-event key last-command-event ! ; 30 | : !last-command this-command @ last-command ! ; 31 | : command-execute last-command-event @ global-map lookup-key !last-command ; 32 | : command-loop begin get-event 0message command-execute redisplay again ; 33 | 34 | : fmacs init-tty redisplay command-loop restore-tty ; 35 | 36 | here 'text ! 1024 allot 37 | 'text @ 1024 blank 38 | 39 | : th-line 64 * 'text @ + swap cmove ; 40 | s" Welcome to Fmacs, one component of the Forth operating system." 0 th-line 41 | s" Get help C-h (Hold down CTRL and press h)" 2 th-line 42 | s" Undo changes C-x u" 3 th-line 43 | s" Exit Fmacs and Forth C-x C-c" 4 th-line 44 | s" Suspend to Forth C-z" 5 th-line 45 | s" (`C-' means use the CTRL key. `M-' means use the Meta key." 6 th-line 46 | s" Fmacs 0.0.1 Copyright (C) 2016 Lars Brinkhoff" 8 th-line 47 | s" Fmacs comes with ABSOLUTELY NO WARRANTY; type C-h C-w for full" 9 th-line 48 | s" details. Fmacs is Free Software--Free as in Freedom--so you can" 10 th-line 49 | s" redistribute copies of Fmacs and modify it; type C-h C-c to see" 11 th-line 50 | s" the conditions." 12 th-line 51 | -------------------------------------------------------------------------------- /src/format.fth: -------------------------------------------------------------------------------- 1 | \ Copyright 2016 Lars Brinkhoff 2 | 3 | create out 128 allot 4 | variable 'out 5 | variable nout 6 | variable 'in 7 | variable nin 8 | 9 | : in! nin ! 'in ! ; 10 | : in? nin @ ; 11 | : in@+ 'in @ c@ 1 'in +! -1 nin +! ; 12 | : 0out out 'out ! 0 nout ! ; 13 | : out!+ 'out @ c! 1 'out +! 1 nout +! ; 14 | : >out bounds ?do i c@ out!+ loop ; 15 | : out> out nout @ ; 16 | 17 | : percent: create , does> perform ; 18 | 19 | vocabulary percent 20 | also percent definitions 21 | :noname out!+ ; percent: c 22 | :noname >out ; percent: s 23 | :noname base @ >r decimal 0 <# #s #> >out r> base ! ; percent: d 24 | :noname base @ >r hex 0 <# #s #> >out r> base ! ; percent: x 25 | previous definitions 26 | 27 | variable tmp 28 | : >str ( c -- a 1 ) tmp c! tmp 1 ; 29 | 30 | : percent in@+ >str also percent evaluate previous ; 31 | 32 | : process in@+ dup [char] % = if drop percent else out!+ then ; 33 | : format ( n*x a1 u1 -- a2 u2 ) in! 0out begin in? while process repeat out> ; 34 | -------------------------------------------------------------------------------- /src/keymap.fth: -------------------------------------------------------------------------------- 1 | \ Copyright 2016 Lars Brinkhoff 2 | 3 | : !this-command dup this-command ! ; 4 | : ?execute if !this-command execute else s" Undefined key" message then ; 5 | : lookup-key ( c wl -- ) swap >str rot search-wordlist ?execute ; 6 | 7 | : define-key ( xt c wl -- ) get-current >r set-current 8 | >str "create , r> set-current does> perform ; 9 | -------------------------------------------------------------------------------- /src/kill.fth: -------------------------------------------------------------------------------- 1 | create 'kill 1024 allot 2 | variable #kill 0 #kill ! 3 | variable 'kill-region 4 | 5 | : >text 'text @ + ; 6 | : region point @ >text mark @ >text 2dup max >r min r> ; 7 | : kill-new over - dup #kill ! 'kill swap cmove ; 8 | : kill-end 'kill #kill @ + ; 9 | : kill-append over - >r kill-end r@ cmove r> #kill +! ; 10 | : append? last-command @ 'kill-region @ = ; 11 | : !kill 'kill-region @ this-command ! ; 12 | : kill append? if kill-append else kill-new then !kill ; 13 | : kill-region ( TODO ) ; 14 | ' kill-region 'kill-region ! 15 | : kill-ring-save region kill ; 16 | : yank 'kill #kill @ bounds ?do i c@ insert-char loop ; 17 | 18 | \ TODO: add to kill ring. 19 | : kill-word begin word? 0= while delete-char repeat 20 | begin word? while delete-char repeat ; 21 | : backward-kill-word backward-char 22 | begin word? 0= while delete-backward-char repeat 23 | begin word? while delete-backward-char repeat 24 | forward-char ; 25 | -------------------------------------------------------------------------------- /src/minibuffer.fth: -------------------------------------------------------------------------------- 1 | create 'minibuffer 128 allot 2 | variable saved-point 3 | variable saved-'text 4 | variable callback 5 | 6 | : 0minibuffer ( a u -- ) 'minibuffer 64 blank 'minibuffer swap move ; 7 | 8 | : quit-minibuffer 0 window-line ! 16 window-height ! 9 | ['] newline 13 global-map define-key 10 | ['] keyboard-quit 7 global-map define-key 11 | saved-'text @ 'text ! saved-point @ point ! ; 12 | 13 | : exit-minibuffer quit-minibuffer callback perform ; 14 | 15 | : read-from-minibuffer ( xt a u -- ) point @ saved-point ! dup point ! 16 | 0minibuffer 'text @ saved-'text ! 'minibuffer 'text ! 1 window-height ! 17 | 17 window-line ! callback ! ['] exit-minibuffer 13 global-map define-key 18 | ['] quit-minibuffer 7 global-map define-key ; 19 | -------------------------------------------------------------------------------- /src/point.fth: -------------------------------------------------------------------------------- 1 | variable point 2 | variable mark 3 | 4 | : goto-char point ! ; 5 | : set-mark mark ! ; 6 | 7 | : point-min 0 ; 8 | : point-max 1023 ; 9 | 10 | : set-mark-command point @ set-mark ; 11 | : exchange-point-and-mark point @ mark @ goto-char set-mark ; 12 | 13 | : forward-char 1 point +! ; 14 | : backward-char -1 point +! ; 15 | : next-line 64 point +! ; 16 | : previous-line -64 point +! ; 17 | 18 | : >= < 0= ; 19 | : word? point @ 'text @ + c@ [char] 0 >= ; 20 | : forward-word begin word? 0= while forward-char repeat 21 | begin word? while forward-char repeat ; 22 | : backward-word backward-char begin word? 0= while backward-char repeat 23 | begin word? while backward-char repeat forward-char ; 24 | 25 | : beginning-of-line point @ -64 and goto-char ; 26 | : end-of-line point @ -64 and 63 + goto-char ; 27 | 28 | : beginning-of-buffer point-min goto-char ; 29 | : end-of-buffer point-max goto-char ; 30 | -------------------------------------------------------------------------------- /src/text.fth: -------------------------------------------------------------------------------- 1 | : 'point 'text @ point @ + ; 2 | : #>end 63 point @ 63 and - ; 3 | : 'end 'text @ point @ -64 and + 63 + ; 4 | : insert-char ( c -- ) 'point dup 1+ #>end move 'point c! forward-char ; 5 | : delete-char 'point dup 1+ swap #>end move bl 'end c! ; 6 | : delete-backward-char backward-char delete-char ; 7 | 8 | : self-insert-command last-command-event @ insert-char ; 9 | : quoted-insert key insert-char ; 10 | : newline s" Newline" message ; 11 | 12 | : undo s" You know that last thing you did? Just do it in reverse." message ; 13 | -------------------------------------------------------------------------------- /src/tty.fth: -------------------------------------------------------------------------------- 1 | \ Access TTY settings in Linux/i386. 2 | 3 | require targets/x86/asm.fth 4 | require targets/x86/next.fth 5 | 6 | \ Linux ioctl syscall. 7 | code linux-ioctl ( arg fd cmd -- ) 8 | eax push, 9 | ebx push, 10 | ecx push, 11 | edx push, 12 | 13 | 24 esp )# edx mov, \ arg 14 | 16 esp )# ecx mov, \ cmd 15 | 20 esp )# ebx mov, \ fd 16 | 54 # eax mov, 17 | 128 # int, 18 | 19 | edx pop, 20 | ecx pop, 21 | ebx pop, 22 | eax pop, 23 | 24 | 12 # esp add, 25 | next, 26 | end-code 27 | 28 | \ TCGETS and TCSETS ioctl calls. 29 | 21505 constant tcgets 30 | 21506 constant tcsets 31 | : tcgetattr tcgets linux-ioctl ; 32 | : tcsetattr tcsets linux-ioctl ; 33 | 34 | \ termios 35 | 60 constant /termios 36 | create saved-termios /termios allot 37 | : raw-termios here /termios erase 1 here 23 + c! here ; 38 | 39 | \ Handle TTY settings. 40 | : save-tty saved-termios 0 tcgetattr ; 41 | : raw-tty raw-termios 0 tcsetattr ; 42 | : init-tty save-tty raw-tty ; 43 | : restore-tty saved-termios 0 tcsetattr ; 44 | -------------------------------------------------------------------------------- /src/vt100.fth: -------------------------------------------------------------------------------- 1 | : .c char postpone literal postpone emit ; immediate 2 | : .d (.) ; 3 | : .; .c ; ; 4 | : esc[ 27 emit .c [ ; 5 | 6 | : .clear esc[ .c 2 .c J ; 7 | : .home esc[ .c H ; 8 | : .rev esc[ .c 7 .c m ; 9 | : .unrev esc[ .c m ; 10 | : .nl 13 emit cr ; 11 | : page .clear .home ; 12 | : at-xy esc[ 1+ .d .; 1+ .d .c H ; 13 | -------------------------------------------------------------------------------- /src/window.fth: -------------------------------------------------------------------------------- 1 | variable window-line 0 window-line ! 2 | variable window-height 16 window-height ! 3 | -------------------------------------------------------------------------------- /wercker.yml: -------------------------------------------------------------------------------- 1 | box: larsbrinkhoff/lbforth 2 | build: 3 | steps: 4 | - script: 5 | name: build 6 | code: forth < build.fth; chmod a+x fmacs 7 | - script: 8 | name: test 9 | code: printf '\030\003' | ./fmacs 10 | --------------------------------------------------------------------------------