Source

eieio / eieio-speedbar.el

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
;;; eieio-speedbar.el -- Classes for managing speedbar displays.

;;;
;; Copyright (C) 1999, 2000, 2001 Eric M. Ludlam
;;
;; Author: <zappo@gnu.org>
;; RCS: $Id$
;; Keywords: oop, tools
;;
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program; if not, you can either send email to this
;; program's author (see below) or write to:
;;
;;              The Free Software Foundation, Inc.
;;              675 Mass Ave.
;;              Cambridge, MA 02139, USA.
;;
;; Please send bug reports, etc. to zappo@gnu.org

;;; Commentary:
;;  
;;  This provides some classes that can be used as a parent which
;; will automatically provide SPEEDBAR support for any list of objects
;; of that type.
;;
;; This file requires speedbar version 0.10 or later.

;;; Creating a new speedbar mode based on a pre-existing object hierarchy
;;
;; To create a new speedbar mode based on lists of objects is easier
;; than creating a whole new speedbar mode from scratch.
;;
;; 1) Objects that will have lists of items that can be expanded
;;    should also inherit from the classes:
;;  * `eieio-speedbar-directory-button' - objects that behave like directories
;;  * `eieio-speedbar-file-button'      - objects that behave like files
;;
;; 2) Objects that have lists of children should implement the method
;;    `eieio-speedbar-object-children' which returns a list of more
;;    objects, or a list of strings.
;;
;; 3) Objects that return a list of strings should also implement these
;;    methods:
;;  * `eieio-speedbar-child-make-tag-lines' - make tag lines for a child.
;;  * `eieio-speedbar-child-description' - describe non-object children
;;
;; 4) Objects which have expanded information should implement the method
;;    `eieio-speedbar-description' to produce more information.
;;
;; 5) Objects that are associated with a directory should implement
;;    the method `eieio-speedbar-derive-line-path' which returns a
;;    path.
;;
;; 6) Objects that have a specialized behavior when clicked should
;;    define the method `eieio-speedbar-handle-click'.
;;
;; To initialize a new eieio based speedbar display, do the following.
;;
;; 1) Create a keymap variable `foo-speedbar-key-map'.
;;    This keymap variable should be initialized in a function.
;;    If you have no special needs, use `eieio-speedbar-key-map'
;;
;; 2) Create a variable containing an easymenu definition compatible
;;    with speedbar.  if you have no special needs, use
;;    `eieio-speedbar-menu'.
;;
;; 3) Create a function which returns the top-level list of children
;;    objects to be displayed in speedbar.
;;
;; 4) Call `eieio-speedbar-create' as specified in it's documentation
;;    string.   This will automatically handle cases when speedbar is
;;    not already loaded, and specifying all overload functions.
;;
;; 5) Create an initliazer function which looks like this:
;; 
;; (defun my-speedbar-mode-initilaize ()
;;   "documentation"
;;   (interactive)
;;   (speedbar-frame-mode 1)
;;   (speedbar-change-initial-expansion-list mymodename)
;;   (speedbar-get-focus))
;; 
;; where `mymodename' is the same value as passed to `eieio-speedbar-create'
;; as the MODENAME parameter.

;;; Code:
(require 'eieio)
(require 'eieio-custom)
(require 'speedbar)

;;; Support a way of adding generic object based modes into speedbar.
;;
(defvar eieio-speedbar-key-map nil
  "A Generic object based speedbar display keymap.")

(defun eieio-speedbar-make-map ()
  "Make the generic object based speedbar keymap."
  (setq eieio-speedbar-key-map (speedbar-make-specialized-keymap))

  ;; General viewing things
  (define-key eieio-speedbar-key-map "\C-m" 'speedbar-edit-line)
  (define-key eieio-speedbar-key-map "+" 'speedbar-expand-line)
  (define-key eieio-speedbar-key-map "=" 'speedbar-expand-line)
  (define-key eieio-speedbar-key-map "-" 'speedbar-contract-line)

  ;; Some object based things
  (define-key eieio-speedbar-key-map "C" 'eieio-speedbar-customize-line)
  )

(defvar eieio-speedbar-menu
  '([ "Edit Object/Field" speedbar-edit-line t]
    [ "Expand Object" speedbar-expand-line
      (save-excursion (beginning-of-line)
		      (looking-at "[0-9]+: *.\\+. "))]
    [ "Contract Object" speedbar-contract-line
      (save-excursion (beginning-of-line)
		      (looking-at "[0-9]+: *.-. "))]
    "---"
    [ "Customize Object" eieio-speedbar-customize-line
      (object-p (speedbar-line-token)) ]
    )
  "Menu part in easymenu format used in speedbar while browsing objects.")

(defalias 'eieio-speedbar-customize-line  'speedbar-edit-line)

(defun eieio-speedbar-create (map-fn map-var menu-var modename fetcher)
  "Create a speedbar mode for displaying an object hierarchy.
MAP-FN is the keymap generator function used for extra keys.
MAP-VAR is the keymap variable used.
MENU-VAR is the symbol containting an easymenu compatible menu part to use.
MODENAME is a s tring used to identify this browser mode.
FETCHER is a generic function used to fetch the base object list used when
creating the speedbar display."
  (if (not (featurep 'speedbar))
      (add-hook 'speedbar-load-hook
		(list 'lambda nil
		      (list 'eieio-speedbar-create-engine
			    map-fn map-var menu-var modename fetcher)))
    (eieio-speedbar-create-engine map-fn map-var menu-var modename fetcher)))

(defun eieio-speedbar-create-engine (map-fn map-var menu-var modename fetcher)
  "Create a speedbar mode for displaying an object hierarchy.
Called from `eieio-speedbar-create', or the speedbar load-hook.
MAP-FN, MAP-VAR, MENU-VAR, MODENAME, and FETCHER are the same as
`eieio-speedbar-create'."
  ;; make sure the keymap exists
  (funcall map-fn)
  ;; Add to the expansion list.
  (speedbar-add-expansion-list
   (list modename
	 menu-var
	 map-var
	 (list 'lambda '(dir depth)
	       (list 'eieio-speedbar-buttons 'dir 'depth
		     (list 'quote fetcher)))))
  ;; Set the special functions.
  (speedbar-add-mode-functions-list
   (list modename
	 '(speedbar-item-info . eieio-speedbar-item-info)
	 '(speedbar-line-path . eieio-speedbar-line-path))))

(defun eieio-speedbar-buttons (dir-or-object depth fetcher)
  "Create buttons for the speedbar display.
Start in directory DIR-OR-OBJECT.  If it is an object, just display that
objects subelements.
Argument DEPTH specifies how far down we have already been displayed.
If it is a directory, use FETCHER to fetch all objects associated with
that path."
  (let ((objlst (cond ((object-p dir-or-object)
		       (list dir-or-object))
		      ((stringp dir-or-object)
		       (funcall fetcher dir-or-object))
		      (t dir-or-object))))
    (if (not objlst)
	(speedbar-make-tag-line nil nil nil nil "Empty display" nil nil nil
				depth)
      ;; Dump all objects into speedbar
      (while objlst
	(eieio-speedbar-make-tag-line (car objlst) depth)
	(setq objlst (cdr objlst))))))


;;; DEFAULT SUPERCLASS baseline methods
;;
;; First, define methods onto the superclass so all classes
;; will have some minor support.

(defmethod eieio-speedbar-description ((object eieio-default-superclass))
  "Return a string describing OBJECT."
  (object-name-string object))

(defmethod eieio-speedbar-derive-line-path ((object eieio-default-superclass))
  "Return the path which OBJECT has something to do with."
  nil)

(defmethod eieio-speedbar-object-buttonname ((object eieio-default-superclass))
  "Return a string to use as a speedbar button for OBJECT."
  (object-name-string object))

(defmethod eieio-speedbar-make-tag-line ((object eieio-default-superclass)
					 depth)
  "Insert a tag line into speedbar at point for OBJECT.
By default, all objects appear as simple TAGS with no need to inherit from
the special `eieio-speedbar' classes.  Child classes should redefine this
method to create more accurate tag lines.
Argument DEPTH is the depth at which the tag line is inserted."
  (speedbar-make-tag-line nil nil nil nil
			  (eieio-speedbar-object-buttonname object)
			  'eieio-speedbar-object-click
			  object
			  'speedbar-tag-face
			  depth))

(defmethod eieio-speedbar-handle-click ((object eieio-default-superclass))
  "Handle a click action on OBJECT in speedbar.
Any object can be represented as a tag in SPEEDBAR without special
attributes.  These default objects will be pulled up in a custom
object edit buffer doing an in-place edit.

If your object represents some other item, override this method
and take the apropriate action."
  (require 'eieio-custom)
  (speedbar-with-attached-buffer
   (eieio-customize-object object))
  (speedbar-maybee-jump-to-attached-frame))


;;; Class definitions
;;
;; Now define a special speedbar class with some
;; variables with :allocation class which can be attached into
;; object hierarchies.
;;
;; These more complex types are for objects which wish to display
;; lists of children buttons.

(defclass eieio-speedbar nil
  ((buttontype :initform nil
	       :type symbol
	       :documentation
	       "The type of expansion button used for objects of this class.
Possible values are those symbols supported by the `exp-button-type' argument
to `speedbar-make-tag-line'."
	       :allocation class)
   (buttonface :initform speedbar-tag-face
	       :type (or symbol face)
	       :documentation
	       "The face used on the textual part of the button for this class.
See `speedbar-make-tag-line' for details."
	       :allocation class)
   (expanded :initform nil
	     :type boolean
	     :documentation
	     "State of an object being expanded in speedbar.")
   )
  "Class which provides basic speedbar support for child classes.
Add one of thie child classes to this class to the parent list of a class.")

(defclass eieio-speedbar-directory-button (eieio-speedbar)
  ((buttontype :initform angle)
   (buttonface :initform speedbar-directory-face))
  "Class providing support for objects which behave like a directory.")

(defclass eieio-speedbar-file-button (eieio-speedbar)
  ((buttontype :initform bracket)
   (buttonface :initform speedbar-file-face))
  "Class providing support for objects which behave like a directory.")


;;; Methods to eieio-speedbar-* which do not need to be overriden
;;
(defmethod eieio-speedbar-make-tag-line ((object eieio-speedbar)
					 depth)
  "Insert a tag line into speedbar at point for OBJECT.
All objects a child of symbol `eieio-speedbar' can be created from this
method.  Override this if you need non-traditional tag lines.
Argument DEPTH is the depth at which the tag line is inserted."
  (let ((children (eieio-speedbar-object-children object))
	(exp (oref object expanded)))
    (if (not children)
	(speedbar-make-tag-line (oref object buttontype)
				?? nil nil
				(eieio-speedbar-object-buttonname object)
				'eieio-speedbar-object-click
				object
				(oref object buttonface)
				depth)
      (speedbar-make-tag-line (oref object buttontype)
			      (if exp ?- ?+)
			      'eieio-speedbar-object-expand
			      object
			      (eieio-speedbar-object-buttonname object)
			      'eieio-speedbar-object-click
			      object
			      (oref object buttonface)
			      depth)
      (if exp
	  (eieio-speedbar-expand object (1+ depth))))))

(defmethod eieio-speedbar-child-make-tag-lines ((object eieio-speedbar) depth)
  "Base method for creating tag lines for non-object children."
  (error "You must implement `eieio-speedbar-child-make-tag-lnes' for %s"
	 (object-name object)))

(defmethod eieio-speedbar-expand ((object eieio-speedbar) depth)
  "Expand OBJECT at indentation DEPTH.
Inserts a list of new tag lines representing expanded elements withing
OBJECT."
  (let ((children (eieio-speedbar-object-children object)))
    (cond ((object-p (car children))
	   (mapcar (lambda (car)
		     (eieio-speedbar-make-tag-line car depth))
		   children))
	  (t (eieio-speedbar-child-make-tag-lines object depth)))))


;;; Speedbar specific function callbacks.
;;
(defun eieio-speedbar-object-click (text token indent)
  "Handle a user click on TEXT representing object TOKEN.
The object is at indentation level INDENT."
  (eieio-speedbar-handle-click token))

(defun eieio-speedbar-object-expand (text token indent)
  "Expand object represented by TEXT.  TOKEN is the object.
INDENT is the current indentation level."
  (cond ((string-match "+" text)	;we have to expand this file
	 (speedbar-change-expand-button-char ?-)
	 (oset token expanded t)
	 (speedbar-with-writable
	   (save-excursion
	     (end-of-line) (forward-char 1)
	     (eieio-speedbar-expand token (1+ indent)))))
	((string-match "-" text)	;we have to contract this node
	 (speedbar-change-expand-button-char ?+)
	 (oset token expanded nil)
	 (speedbar-delete-subblock indent))
	(t (error "Ooops... not sure what to do")))
  (speedbar-center-buffer-smartly))

(defmethod eieio-speedbar-child-description ((obj eieio-speedbar))
  "Return a description for a child of OBJ which is not an object."
  (error "You must implement `eieio-speedbar-child-description' for %s"
	 (object-name obj)))

(defun eieio-speedbar-item-info ()
  "Display info for the current line when in EDE display mode."
  ;; Switch across the types of the tokens.
  (let ((tok (speedbar-line-token)))
    (cond ((object-p tok)
	   (message (eieio-speedbar-description tok)))
	  (t
	   (let ((no (eieio-speedbar-find-nearest-object)))
	     (if no
		 (eieio-speedbar-child-description no)))))))

(defun eieio-speedbar-find-nearest-object (&optional depth)
  "Search backwards to the first line associated with an object.
Optional argument DEPTH is the current depth of the search."
  (save-excursion
    (if (not depth)
	(progn
	  (beginning-of-line)
	  (when (looking-at "^\\([0-9]+\\):")
	    (setq depth (string-to-int (match-string 1))))))
    (when depth
      (while (and (not (object-p (speedbar-line-token)))
		  (> depth 0))
	(setq depth (1- depth))
	(re-search-backward (format "^%d:" depth) nil t))
      (speedbar-line-token))))

(defun eieio-speedbar-line-path (&optional depth)
  "If applicable, return the path to the file the cursor is on.
Optional DEPTH is the depth we start at."
  (save-match-data
    (if (not depth)
	(progn
	  (beginning-of-line)
	  (looking-at "^\\([0-9]+\\):")
	  (setq depth (string-to-int (match-string 1)))))
    ;; This whole function is presently bogus.  Make it better later.
    (let ((tok (eieio-speedbar-find-nearest-object depth)))
      (if (object-p tok)
	  (eieio-speedbar-derive-line-path tok)
	default-directory))))


;;; Methods to the eieio-speedbar-* classes which need to be overriden.
;;
(defmethod eieio-speedbar-object-children ((object eieio-speedbar))
  "Return a list of children to be displayed in SPEEDBAR.
If the return value is a list of OBJECTs, then those objects are
queried for details.  If the return list is made of strings,
then this object will be queried for the details needed
to create a speedbar button."
  nil)

(provide 'eieio-speedbar)

;;; eieio-speedbar.el ends here
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.