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Revision 1.7 - (hide annotations)
Fri Oct 4 17:00:30 1991 UTC (22 years, 6 months ago) by chiles
Branch: MAIN
Changes since 1.6: +2 -2 lines
Adjusted length of the :hemlock-banner modeline-field to prevent the
*truncated-field-character* from appearing after the date.
1 ram 1.1 ;;; -*- Log: hemlock.log; Package: Hemlock-Internals -*-
2     ;;;
3     ;;; **********************************************************************
4 ram 1.3 ;;; This code was written as part of the CMU Common Lisp project at
5     ;;; Carnegie Mellon University, and has been placed in the public domain.
6     ;;; If you want to use this code or any part of CMU Common Lisp, please contact
7     ;;; Scott Fahlman or slisp-group@cs.cmu.edu.
8     ;;;
9     (ext:file-comment
10 chiles 1.7 "$Header: /tiger/var/lib/cvsroots/cmucl/src/hemlock/main.lisp,v 1.7 1991/10/04 17:00:30 chiles Exp $")
11 ram 1.3 ;;;
12 ram 1.1 ;;; **********************************************************************
13     ;;;
14     ;;; Hemlock initialization code and random debugging stuff.
15     ;;;
16     ;;; Written by Bill Chiles and Rob MacLachlan
17     ;;;
18    
19     (in-package "HEMLOCK-INTERNALS")
20    
21     (export '(*global-variable-names* *mode-names* *buffer-names*
22     *character-attribute-names* *command-names* *buffer-list*
23 ram 1.2 *window-list* *last-key-event-typed* after-editor-initializations))
24 ram 1.1
25    
26     (in-package "EXTENSIONS")
27     (export '(save-all-buffers *hemlock-version*))
28     (in-package "HEMLOCK-INTERNALS")
29    
30    
31    
32     ;;;; Definition of *hemlock-version*.
33    
34 ram 1.5 (defvar *hemlock-version* "3.5")
35 ram 1.1
36    
37    
38     ;;;; %INIT-HEMLOCK.
39    
40     (defun %init-hemlock ()
41     "Initialize hemlock's internal data structures."
42     ;;
43     ;; This function is defined in Buffer.Lisp. It creates fundamental mode
44     ;; and the buffer main. Until this is done it is not possible to define
45     ;; or use Hemlock variables.
46     (setup-initial-buffer)
47     ;;
48     ;; Define some of the system variables.
49     (define-some-variables)
50     ;;
51     ;; Site initializations such as window system variables.
52     (site-init)
53     ;;
54     ;; Set up syntax table data structures.
55     (%init-syntax-table)
56     ;;
57     ;; Define print representations for funny characters.
58     (%init-line-image))
59    
60    
61    
62     ;;;; Define some globals.
63    
64     ;;; These globals cannot be defined in the appropriate file due to compilation
65     ;;; or load time constraints.
66     ;;;
67    
68     ;;; The following belong in other files, but those files are loaded before
69     ;;; table.lisp which defines MAKE-STRING-TABLE.
70     ;;;
71     ;;; vars.lisp
72     (defvar *global-variable-names* (make-string-table)
73     "A String Table of global variable names, the values are the symbol names.")
74     ;;;
75     ;;; buffer.lisp
76     (defvar *mode-names* (make-string-table) "A String Table of Mode names.")
77     (defvar *buffer-names* (make-string-table)
78     "A String Table of Buffer names and their corresponding objects.")
79     ;;;
80     ;;; interp.lisp
81     (defvar *command-names* (make-string-table) "String table of command names.")
82     ;;;
83     ;;; syntax.lisp
84     (defvar *character-attribute-names* (make-string-table)
85     "String Table of character attribute names and their corresponding keywords.")
86    
87    
88    
89     ;;;; DEFINE-SOME-VARIABLES.
90    
91     ;;; This is necessary to define "Default Status Line Fields" which belongs
92     ;;; beside the other modeline variables. This DEFVAR would live in
93     ;;; Morecoms.Lisp, but it is compiled and loaded after this file.
94     ;;;
95     (proclaim '(special ed::*recursive-edit-count*))
96     ;;;
97     (make-modeline-field
98     :name :edit-level :width 15
99     :function #'(lambda (buffer window)
100     (declare (ignore buffer window))
101     (if (zerop ed::*recursive-edit-count*)
102     ""
103     (format nil "Edit Level: ~2,'0D "
104     ed::*recursive-edit-count*))))
105    
106     ;;; This is necessary to define "Default Status Line Fields" which belongs
107     ;;; beside the other modeline variables. This DEFVAR would live in
108     ;;; Completion.Lisp, but it is compiled and loaded after this file.
109     ;;;
110     (proclaim '(special ed::*completion-mode-possibility*))
111     ;;; Hack for now until completion mode is added.
112     (defvar ed::*completion-mode-possibility* "")
113     ;;;
114     (make-modeline-field
115     :name :completion :width 40
116     :function #'(lambda (buffer window)
117     (declare (ignore buffer window))
118     ed::*completion-mode-possibility*))
119    
120    
121     (defun define-some-variables ()
122     (defhvar "Default Modes"
123     "This variable contains the default list of modes for new buffers."
124     :value '("Fundamental" "Save"))
125     (defhvar "Echo Area Height"
126     "Number of lines in the echo area window."
127     :value 3)
128     (defhvar "Make Buffer Hook"
129     "This hook is called with the new buffer whenever a buffer is created.")
130     (defhvar "Delete Buffer Hook"
131     "This hook is called with the buffer whenever a buffer is deleted.")
132     (defhvar "Enter Recursive Edit Hook"
133     "This hook is called with the new buffer when a recursive edit is
134     entered.")
135     (defhvar "Exit Recursive Edit Hook"
136     "This hook is called with the value returned when a recursive edit
137     is exited.")
138     (defhvar "Abort Recursive Edit Hook"
139     "This hook is called with the editor-error args when a recursive
140     edit is aborted.")
141     (defhvar "Buffer Major Mode Hook"
142     "This hook is called with the buffer and the new mode when a buffer's
143     major mode is changed.")
144     (defhvar "Buffer Minor Mode Hook"
145     "This hook is called a minor mode is changed. The arguments are
146     the buffer, the mode affected and T or NIL depending on when the
147     mode is being turned on or off.")
148     (defhvar "Buffer Writable Hook"
149     "This hook is called whenever someone sets whether the buffer is
150     writable.")
151     (defhvar "Buffer Name Hook"
152     "This hook is called with the buffer and the new name when the name of a
153     buffer is changed.")
154     (defhvar "Buffer Pathname Hook"
155     "This hook is called with the buffer and the new Pathname when the Pathname
156     associated with the buffer is changed.")
157     (defhvar "Buffer Modified Hook"
158     "This hook is called whenever a buffer changes from unmodified to modified
159     and vice versa. It takes the buffer and the new value for modification
160     flag.")
161     (defhvar "Set Buffer Hook"
162     "This hook is called with the new buffer when the current buffer is set.")
163     (defhvar "After Set Buffer Hook"
164     "This hook is invoked with the old buffer after the current buffer has
165     been changed.")
166     (defhvar "Set Window Hook"
167     "This hook is called with the new window when the current window
168     is set.")
169     (defhvar "Make Window Hook"
170     "This hook is called with a new window when one is created.")
171     (defhvar "Delete Window Hook"
172     "This hook is called with a window before it is deleted.")
173     (defhvar "Window Buffer Hook"
174     "This hook is invoked with the window and new buffer when a window's
175     buffer is changed.")
176     (defhvar "Delete Variable Hook"
177     "This hook is called when a variable is deleted with the args to
178     delete-variable.")
179     (defhvar "Entry Hook"
180     "this hook is called when the editor is entered.")
181     (defhvar "Exit Hook"
182     "This hook is called when the editor is exited.")
183     (defhvar "Redisplay Hook"
184     "This is called on the current window from REDISPLAY after checking the
185     window display start, window image, and recentering. After calling the
186     functions in this hook, we do the above stuff and call the smart
187     redisplay method for the device."
188     :value nil)
189     (defhvar "Key Echo Delay"
190     "Wait this many seconds before echoing keys in the command loop. This
191     feature is inhibited when nil."
192     :value 1.0)
193     (defhvar "Input Hook"
194     "The functions in this variable are invoked each time a character enters
195     Hemlock."
196     :value nil)
197     (defhvar "Abort Hook"
198     "These functions are invoked when ^G is typed. No arguments are passed."
199     :value nil)
200     (defhvar "Command Abort Hook"
201     "These functions get called when commands are aborted, such as with
202     EDITOR-ERROR."
203     :value nil)
204     (defhvar "Character Attribute Hook"
205     "This hook is called with the attribute, character and new value
206     when the value of a character attribute is changed.")
207     (defhvar "Shadow Attribute Hook"
208     "This hook is called when a mode character attribute is made.")
209     (defhvar "Unshadow Attribute Hook"
210     "This hook is called when a mode character attribute is deleted.")
211     (defhvar "Default Modeline Fields"
212     "The default list of modeline-fields for MAKE-WINDOW."
213     :value *default-modeline-fields*)
214     (defhvar "Default Status Line Fields"
215     "This is the default list of modeline-fields for the echo area window's
216     modeline which is used for general information."
217     :value (list (make-modeline-field
218 chiles 1.7 :name :hemlock-banner :width 28
219 ram 1.1 :function #'(lambda (buffer window)
220     (declare (ignore buffer window))
221     (format nil "Hemlock ~A "
222     *hemlock-version*)))
223     (modeline-field :edit-level)
224     (modeline-field :completion)))
225     (defhvar "Maximum Modeline Pathname Length"
226     "When set, this variable is the maximum length of the display of a pathname
227     in a modeline. When the pathname is too long, the :buffer-pathname
228     modeline-field function chops off leading directory specifications until
229     the pathname fits. \"...\" indicates a truncated pathname."
230     :value nil
231     :hooks (list 'maximum-modeline-pathname-length-hook)))
232    
233    
234    
235     ;;;; ED.
236    
237     (defvar *editor-has-been-entered* ()
238     "True if and only if the editor has been entered.")
239     (defvar *in-the-editor* ()
240     "True if we are inside the editor. This is used to prevent ill-advised
241     \"recursive\" edits.")
242    
243     (defvar *after-editor-initializations-funs* nil
244     "A list of functions to be called after the editor has been initialized upon
245     entering the first time.")
246    
247     (defmacro after-editor-initializations (&rest forms)
248     "Causes forms to be executed after the editor has been initialized.
249     Forms supplied with successive uses of this macro will be executed after
250     forms supplied with previous uses."
251     `(push #'(lambda () ,@forms)
252     *after-editor-initializations-funs*))
253    
254     (defun ed (&optional x
255     &key (init t)
256     (display (cdr (assoc :display ext:*environment-list*))))
257     "Invokes the editor, Hemlock. If X is supplied and is a symbol, the
258     definition of X is put into a buffer, and that buffer is selected. If X
259     is a pathname, the file specified by X is visited in a new buffer. If X
260     is not supplied or Nil, the editor is entered in the same state as when
261     last exited. When :init is supplied as t (the default), the file
262     \"hemlock-init.fasl\" or \"hemlock-init.lisp\" is loaded from the home or
263     default directory, but the Lisp command line switch -hinit can be used to
264     specify a different name. If the argument is non-nil and not t, then it
265     should be a pathname that will be merged with the home or default directory.
266     The display argument is not currently supported."
267     (when *in-the-editor* (error "You are already in the editor, you bogon!"))
268     (let ((*in-the-editor* t)
269     (display (unless *editor-has-been-entered*
270     (maybe-load-hemlock-init init)
271     ;; Device dependent initializaiton.
272     (init-raw-io display))))
273     (catch 'editor-top-level-catcher
274     (site-wrapper-macro
275     (unless *editor-has-been-entered*
276     ;; Make an initial window, and set up redisplay's internal
277     ;; data structures.
278     (%init-redisplay display)
279     (setq *editor-has-been-entered* t)
280     ;; Pick up user initializations to be done after initialization.
281     (invoke-hook (reverse *after-editor-initializations-funs*)))
282     (catch 'hemlock-exit
283     (catch 'editor-top-level-catcher
284     (cond ((and x (symbolp x))
285     (let* ((name (nstring-capitalize
286     (concatenate 'simple-string "Edit " (string x))))
287     (buffer (or (getstring name *buffer-names*)
288     (make-buffer name)))
289     (*print-case* :downcase))
290     (delete-region (buffer-region buffer))
291     (with-output-to-mark
292     (*standard-output* (buffer-point buffer))
293     (eval `(grindef ,x)) ; hackish, I know...
294     (terpri)
295     (ed::change-to-buffer buffer)
296     (buffer-start (buffer-point buffer)))))
297     ((or (stringp x) (pathnamep x))
298     (ed::find-file-command () x))
299     (x
300     (error
301     "~S is not a symbol or pathname. I can't edit it!" x))))
302    
303     (invoke-hook ed::entry-hook)
304     (unwind-protect
305     (loop
306     (catch 'editor-top-level-catcher
307     (handler-bind ((error #'(lambda (condition)
308     (lisp-error-error-handler condition
309     :internal))))
310     (invoke-hook ed::abort-hook)
311     (%command-loop))))
312     (invoke-hook ed::exit-hook)))))))
313    
314     (defun maybe-load-hemlock-init (init)
315     (when init
316     (let* ((name (case init
317     ((t) (let ((switch (find "hinit" *command-line-switches*
318     :test #'string-equal
319     :key #'cmd-switch-name)))
320     (if switch
321     (or (cmd-switch-value switch)
322     (car (cmd-switch-words switch))
323     "hemlock-init")
324     "hemlock-init")))
325     (t (pathname init)))))
326     (load (merge-pathnames name (user-homedir-pathname))
327     :if-does-not-exist nil))))
328    
329    
330    
331     ;;;; SAVE-ALL-BUFFERS.
332    
333 chiles 1.4 ;;; SAVE-ALL-BUFFERS -- Public.
334     ;;;
335 ram 1.1 (defun save-all-buffers (&optional (list-unmodified-buffers nil))
336 chiles 1.4 "This prompts users with each modified buffer as to whether they want to
337     write it out. If the buffer has no associated file, this will also prompt
338     for a file name. Supplying the optional argument non-nil causes this
339     to prompt for every buffer."
340 ram 1.1 (dolist (buffer *buffer-list*)
341     (when (or list-unmodified-buffers (buffer-modified buffer))
342     (maybe-save-buffer buffer))))
343    
344     (defun maybe-save-buffer (buffer)
345     (let* ((modified (buffer-modified buffer))
346     (pathname (buffer-pathname buffer))
347     (name (buffer-name buffer))
348     (string (if pathname (namestring pathname))))
349     (format t "Buffer ~S is ~:[UNmodified~;modified~], Save it? "
350     name modified)
351 chiles 1.6 (force-output)
352 ram 1.1 (when (y-or-n-p)
353     (let ((name (read-line-default "File to write" string)))
354     (format t "Writing file ~A..." name)
355     (force-output)
356     (write-file (buffer-region buffer) name)
357     (write-line "write WON")))))
358    
359     (defun read-line-default (prompt default)
360     (format t "~A:~@[ [~A]~] " prompt default)
361 chiles 1.6 (force-output)
362 ram 1.1 (do ((result (read-line) (read-line)))
363     (())
364     (declare (simple-string result))
365     (when (plusp (length result)) (return result))
366     (when default (return default))
367 chiles 1.6 (format t "~A:~@[ [~A]~] " prompt default)
368     (force-output)))

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