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60370d40 | 1 | ;;; em-term.el --- running visual commands |
affbf647 | 2 | |
3146b070 | 3 | ;; Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, |
114f9c96 | 4 | ;; 2008, 2009, 2010 Free Software Foundation, Inc. |
affbf647 | 5 | |
7de5b421 GM |
6 | ;; Author: John Wiegley <johnw@gnu.org> |
7 | ||
affbf647 GM |
8 | ;; This file is part of GNU Emacs. |
9 | ||
4ee57b2a | 10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
affbf647 | 11 | ;; it under the terms of the GNU General Public License as published by |
4ee57b2a GM |
12 | ;; the Free Software Foundation, either version 3 of the License, or |
13 | ;; (at your option) any later version. | |
affbf647 GM |
14 | |
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
4ee57b2a | 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
affbf647 | 22 | |
affbf647 GM |
23 | ;;; Commentary: |
24 | ||
25 | ;; At the moment, eshell is stream-based in its interactive input and | |
26 | ;; output. This means that full-screen commands, such as "vi" or | |
27 | ;; "lynx", will not display correctly. These are therefore thought of | |
28 | ;; as "visual" programs. In order to run these progrem under Emacs, | |
29 | ;; Eshell uses the term.el package, and invokes them in a separate | |
30 | ;; buffer, giving the illusion that Eshell itself is allowing these | |
31 | ;; visual processes to execute. | |
32 | ||
dbba8a04 GM |
33 | ;;; Code: |
34 | ||
35 | (eval-when-compile (require 'eshell)) | |
affbf647 GM |
36 | (require 'term) |
37 | ||
3146b070 GM |
38 | ;;;###autoload |
39 | (eshell-defgroup eshell-term nil | |
dbba8a04 GM |
40 | "This module causes visual commands (e.g., 'vi') to be executed by |
41 | the `term' package, which comes with Emacs. This package handles most | |
42 | of the ANSI control codes, allowing curses-based applications to run | |
43 | within an Emacs window. The variable `eshell-visual-commands' defines | |
44 | which commands are considered visual in nature." | |
45 | :tag "Running visual commands" | |
46 | :group 'eshell-module) | |
47 | ||
affbf647 GM |
48 | ;;; User Variables: |
49 | ||
50 | (defcustom eshell-term-load-hook '(eshell-term-initialize) | |
51 | "*A list of functions to call when loading `eshell-term'." | |
52 | :type 'hook | |
53 | :group 'eshell-term) | |
54 | ||
55 | (defcustom eshell-visual-commands | |
56 | '("vi" ; what is going on?? | |
57 | "screen" "top" ; ok, a valid program... | |
58 | "less" "more" ; M-x view-file | |
59 | "lynx" "ncftp" ; w3.el, ange-ftp | |
60 | "pine" "tin" "trn" "elm") ; GNUS!! | |
61 | "*A list of commands that present their output in a visual fashion." | |
62 | :type '(repeat string) | |
63 | :group 'eshell-term) | |
64 | ||
65 | (defcustom eshell-term-name "eterm" | |
66 | "*Name to use for the TERM variable when running visual commands. | |
67 | See `term-term-name' in term.el for more information on how this is | |
68 | used." | |
69 | :type 'string | |
70 | :group 'eshell-term) | |
71 | ||
72 | (defcustom eshell-escape-control-x t | |
73 | "*If non-nil, allow <C-x> to be handled by Emacs key in visual buffers. | |
74 | See the variable `eshell-visual-commands'. If this variable is set to | |
75 | nil, <C-x> will send that control character to the invoked process." | |
76 | :type 'boolean | |
77 | :group 'eshell-term) | |
78 | ||
79 | ;;; Internal Variables: | |
80 | ||
81 | (defvar eshell-parent-buffer) | |
82 | ||
83 | ;;; Functions: | |
84 | ||
85 | (defun eshell-term-initialize () | |
86 | "Initialize the `term' interface code." | |
87 | (make-local-variable 'eshell-interpreter-alist) | |
88 | (setq eshell-interpreter-alist | |
89 | (cons (cons (function | |
90 | (lambda (command) | |
91 | (member (file-name-nondirectory command) | |
92 | eshell-visual-commands))) | |
93 | 'eshell-exec-visual) | |
94 | eshell-interpreter-alist))) | |
95 | ||
96 | (defun eshell-exec-visual (&rest args) | |
97 | "Run the specified PROGRAM in a terminal emulation buffer. | |
98 | ARGS are passed to the program. At the moment, no piping of input is | |
99 | allowed." | |
100 | (let* (eshell-interpreter-alist | |
101 | (interp (eshell-find-interpreter (car args))) | |
102 | (program (car interp)) | |
103 | (args (eshell-flatten-list | |
104 | (eshell-stringify-list (append (cdr interp) | |
105 | (cdr args))))) | |
106 | (term-buf | |
107 | (generate-new-buffer | |
108 | (concat "*" (file-name-nondirectory program) "*"))) | |
109 | (eshell-buf (current-buffer))) | |
110 | (save-current-buffer | |
111 | (switch-to-buffer term-buf) | |
112 | (term-mode) | |
113 | (set (make-local-variable 'term-term-name) eshell-term-name) | |
114 | (make-local-variable 'eshell-parent-buffer) | |
115 | (setq eshell-parent-buffer eshell-buf) | |
116 | (term-exec term-buf program program nil args) | |
117 | (let ((proc (get-buffer-process term-buf))) | |
118 | (if (and proc (eq 'run (process-status proc))) | |
119 | (set-process-sentinel proc 'eshell-term-sentinel) | |
120 | (error "Failed to invoke visual command"))) | |
121 | (term-char-mode) | |
122 | (if eshell-escape-control-x | |
123 | (term-set-escape-char ?\C-x)))) | |
124 | nil) | |
125 | ||
126 | (defun eshell-term-sentinel (proc string) | |
127 | "Destroy the buffer visiting PROC." | |
128 | (let ((proc-buf (process-buffer proc))) | |
129 | (when (and proc-buf (buffer-live-p proc-buf) | |
130 | (not (eq 'run (process-status proc))) | |
131 | (= (process-exit-status proc) 0)) | |
132 | (if (eq (current-buffer) proc-buf) | |
133 | (let ((buf (and (boundp 'eshell-parent-buffer) | |
134 | eshell-parent-buffer | |
135 | (buffer-live-p eshell-parent-buffer) | |
136 | eshell-parent-buffer))) | |
137 | (if buf | |
138 | (switch-to-buffer buf)))) | |
139 | (kill-buffer proc-buf)))) | |
140 | ||
141 | ;; jww (1999-09-17): The code below will allow Eshell to send input | |
142 | ;; characters directly to the currently running interactive process. | |
143 | ;; However, since this would introduce other problems that would need | |
144 | ;; solutions, I'm going to let it wait until after 2.1. | |
145 | ||
146 | ; (defvar eshell-term-raw-map nil | |
147 | ; "Keyboard map for sending characters directly to the inferior process.") | |
148 | ; (defvar eshell-term-escape-char nil | |
149 | ; "Escape character for char-sub-mode of term mode. | |
150 | ; Do not change it directly; use term-set-escape-char instead.") | |
151 | ; (defvar eshell-term-raw-escape-map nil) | |
152 | ||
153 | ; (defun eshell-term-send-raw-string (chars) | |
154 | ; (goto-char eshell-last-output-end) | |
155 | ; (process-send-string (eshell-interactive-process) chars)) | |
156 | ||
157 | ; (defun eshell-term-send-raw () | |
158 | ; "Send the last character typed through the terminal-emulator | |
159 | ; without any interpretation." | |
160 | ; (interactive) | |
161 | ; ;; Convert `return' to C-m, etc. | |
cfa29281 GM |
162 | ; (if (and (symbolp last-input-event) |
163 | ; (get last-input-event 'ascii-character)) | |
164 | ; (setq last-input-event (get last-input-event 'ascii-character))) | |
165 | ; (eshell-term-send-raw-string (make-string 1 last-input-event))) | |
affbf647 GM |
166 | |
167 | ; (defun eshell-term-send-raw-meta () | |
168 | ; (interactive) | |
cfa29281 | 169 | ; (if (symbolp last-input-event) |
affbf647 | 170 | ; ;; Convert `return' to C-m, etc. |
cfa29281 | 171 | ; (let ((tmp (get last-input-event 'event-symbol-elements))) |
affbf647 | 172 | ; (if tmp |
cfa29281 GM |
173 | ; (setq last-input-event (car tmp))) |
174 | ; (if (symbolp last-input-event) | |
affbf647 | 175 | ; (progn |
cfa29281 GM |
176 | ; (setq tmp (get last-input-event 'ascii-character)) |
177 | ; (if tmp (setq last-input-event tmp)))))) | |
178 | ; (eshell-term-send-raw-string (if (and (numberp last-input-event) | |
179 | ; (> last-input-event 127) | |
180 | ; (< last-input-event 256)) | |
181 | ; (make-string 1 last-input-event) | |
182 | ; (format "\e%c" last-input-event)))) | |
affbf647 GM |
183 | |
184 | ; (defun eshell-term-mouse-paste (click arg) | |
185 | ; "Insert the last stretch of killed text at the position clicked on." | |
186 | ; (interactive "e\nP") | |
187 | ; (if (boundp 'xemacs-logo) | |
188 | ; (eshell-term-send-raw-string | |
189 | ; (or (condition-case () (x-get-selection) (error ())) | |
190 | ; (x-get-cutbuffer) | |
191 | ; (error "No selection or cut buffer available"))) | |
192 | ; ;; Give temporary modes such as isearch a chance to turn off. | |
193 | ; (run-hooks 'mouse-leave-buffer-hook) | |
194 | ; (setq this-command 'yank) | |
195 | ; (eshell-term-send-raw-string | |
196 | ; (current-kill (cond ((listp arg) 0) | |
197 | ; ((eq arg '-) -1) | |
198 | ; (t (1- arg))))))) | |
199 | ||
200 | ; ;; Which would be better: "\e[A" or "\eOA"? readline accepts either. | |
201 | ; ;; For my configuration it's definitely better \eOA but YMMV. -mm | |
202 | ; ;; For example: vi works with \eOA while elm wants \e[A ... | |
203 | ; (defun eshell-term-send-up () (interactive) (eshell-term-send-raw-string "\eOA")) | |
204 | ; (defun eshell-term-send-down () (interactive) (eshell-term-send-raw-string "\eOB")) | |
205 | ; (defun eshell-term-send-right () (interactive) (eshell-term-send-raw-string "\eOC")) | |
206 | ; (defun eshell-term-send-left () (interactive) (eshell-term-send-raw-string "\eOD")) | |
207 | ; (defun eshell-term-send-home () (interactive) (eshell-term-send-raw-string "\e[1~")) | |
208 | ; (defun eshell-term-send-end () (interactive) (eshell-term-send-raw-string "\e[4~")) | |
209 | ; (defun eshell-term-send-prior () (interactive) (eshell-term-send-raw-string "\e[5~")) | |
210 | ; (defun eshell-term-send-next () (interactive) (eshell-term-send-raw-string "\e[6~")) | |
211 | ; (defun eshell-term-send-del () (interactive) (eshell-term-send-raw-string "\C-?")) | |
212 | ; (defun eshell-term-send-backspace () (interactive) (eshell-term-send-raw-string "\C-H")) | |
213 | ||
214 | ; (defun eshell-term-set-escape-char (c) | |
215 | ; "Change term-escape-char and keymaps that depend on it." | |
216 | ; (if eshell-term-escape-char | |
217 | ; (define-key eshell-term-raw-map eshell-term-escape-char 'eshell-term-send-raw)) | |
218 | ; (setq c (make-string 1 c)) | |
219 | ; (define-key eshell-term-raw-map c eshell-term-raw-escape-map) | |
220 | ; ;; Define standard bindings in eshell-term-raw-escape-map | |
221 | ; (define-key eshell-term-raw-escape-map "\C-x" | |
222 | ; (lookup-key (current-global-map) "\C-x")) | |
223 | ; (define-key eshell-term-raw-escape-map "\C-v" | |
224 | ; (lookup-key (current-global-map) "\C-v")) | |
225 | ; (define-key eshell-term-raw-escape-map "\C-u" | |
226 | ; (lookup-key (current-global-map) "\C-u")) | |
227 | ; (define-key eshell-term-raw-escape-map c 'eshell-term-send-raw)) | |
228 | ||
229 | ; (defun eshell-term-char-mode () | |
230 | ; "Switch to char (\"raw\") sub-mode of term mode. | |
231 | ; Each character you type is sent directly to the inferior without | |
232 | ; intervention from Emacs, except for the escape character (usually C-c)." | |
233 | ; (interactive) | |
234 | ; (if (not eshell-term-raw-map) | |
235 | ; (let* ((map (make-keymap)) | |
236 | ; (esc-map (make-keymap)) | |
237 | ; (i 0)) | |
238 | ; (while (< i 128) | |
239 | ; (define-key map (make-string 1 i) 'eshell-term-send-raw) | |
240 | ; (define-key esc-map (make-string 1 i) 'eshell-term-send-raw-meta) | |
241 | ; (setq i (1+ i))) | |
242 | ; (define-key map "\e" esc-map) | |
243 | ; (setq eshell-term-raw-map map) | |
244 | ; (setq eshell-term-raw-escape-map | |
245 | ; (copy-keymap (lookup-key (current-global-map) "\C-x"))) | |
246 | ; (if (boundp 'xemacs-logo) | |
247 | ; (define-key eshell-term-raw-map [button2] 'eshell-term-mouse-paste) | |
248 | ; (define-key eshell-term-raw-map [mouse-2] 'eshell-term-mouse-paste)) | |
249 | ; (define-key eshell-term-raw-map [up] 'eshell-term-send-up) | |
250 | ; (define-key eshell-term-raw-map [down] 'eshell-term-send-down) | |
251 | ; (define-key eshell-term-raw-map [right] 'eshell-term-send-right) | |
252 | ; (define-key eshell-term-raw-map [left] 'eshell-term-send-left) | |
253 | ; (define-key eshell-term-raw-map [delete] 'eshell-term-send-del) | |
254 | ; (define-key eshell-term-raw-map [backspace] 'eshell-term-send-backspace) | |
255 | ; (define-key eshell-term-raw-map [home] 'eshell-term-send-home) | |
256 | ; (define-key eshell-term-raw-map [end] 'eshell-term-send-end) | |
257 | ; (define-key eshell-term-raw-map [prior] 'eshell-term-send-prior) | |
258 | ; (define-key eshell-term-raw-map [next] 'eshell-term-send-next) | |
259 | ; (eshell-term-set-escape-char ?\C-c)))) | |
260 | ||
261 | ; (defun eshell-term-line-mode () | |
262 | ; "Switch to line (\"cooked\") sub-mode of eshell-term mode." | |
263 | ; (use-local-map term-old-mode-map)) | |
264 | ||
dbba8a04 | 265 | (provide 'em-term) |
affbf647 | 266 | |
3146b070 GM |
267 | ;; Local Variables: |
268 | ;; generated-autoload-file: "esh-groups.el" | |
269 | ;; End: | |
270 | ||
cbee283d | 271 | ;; arch-tag: ab7c8fe4-3101-4257-925b-1354c6b2fe9d |
affbf647 | 272 | ;;; em-term.el ends here |