eieio / chart.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
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
;;; chart.el --- Draw charts (bar charts, etc)

;;; Copyright (C) 1996, 1998, 1999, 2001 Eric M. Ludlam
;;
;; Author: <zappo@gnu.org>
;; Version: 0.2
;; RCS: $Id$
;; Keywords: OO, chart, graph
;;                                                                          
;; 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 package is an experiment of mine aiding in the debugging of
;; eieio, and proved to be neat enough that others may like to use
;; it.  To quickly see what you can do with chart, run the command
;; `chart-test-it-all'.
;;
;;   Chart current can display bar-charts in either of two
;; directions.  It also supports ranged (integer) axis, and axis
;; defined by some set of strings or names.  These name can be
;; automatically derived from data sequences, which are just lists of
;; anything encapsulated in a nice eieio object.
;;
;;   Current example apps for chart can be accessed via these commands:
;; `chart-file-count'     - count files w/ matching extensions
;; `chart-space-usage'    - display space used by files/directories
;; `chart-emacs-storage'  - Emacs storage units used/free (garbage-collect)
;; `chart-emacs-lists'    - length of Emacs lists
;; `chart-rmail-from'     - who sends you the most mail (in -summary only)
;;
;; Customization:
;;
;;   If you find the default colors and pixmaps unpleasant, or too
;; short, you can change them.  The variable `chart-face-color-list'
;; contains a list of colors, and `chart-face-pixmap-list' contains
;; all the pixmaps to use.  The current pixmaps are those found on
;; several systems I found.  The two lists should be the same length,
;; as the long list will just be truncated.
;;
;;   If you would like to draw your own stipples, simply create some
;; xbm's and put them in a directory, then you can add:
;;
;; (setq x-bitmap-file-path (cons "~/mybitmaps" x-bitmap-file-path))
;;
;; to your .emacs (or wherever) and load the `chart-face-pixmap-list'
;; with all the bitmaps you want to use.

(require 'eieio)

;;; Code:
(defvar chart-map nil "Keymap used in chart mode.")
(if chart-map
    ()
  (setq chart-map (make-sparse-keymap))
  )

(defvar chart-local-object nil
  "Local variable containing the locally displayed chart object.")
(make-variable-buffer-local 'chart-local-object)

(defvar chart-face-list nil
  "Faces used to colorize charts.
List is limited currently, which is ok since you really can't display
too much in text characters anyways.")

(defvar chart-face-color-list '("red" "green" "blue"
				"cyan" "yellow" "purple")
  "Colors to use when generating `chart-face-list'.
Colors will be the background color.")

(defvar chart-face-pixmap-list
  (if (and (fboundp 'display-graphic-p)
	   (display-graphic-p))
      '("dimple1" "scales" "dot" "cross_weave" "boxes" "dimple3"))
  "If pixmaps are allowed, display these background pixmaps.
Useful if new Emacs is used on B&W display")

(defcustom chart-face-use-pixmaps nil
  "*Non-nil to use fancy pixmaps in the background of chart face colors."
  :group 'eieio
  :type 'boolean)

(if (and (if (fboundp 'display-color-p)
	     (display-color-p)
	   window-system)
	 (not chart-face-list))
    (let ((cl chart-face-color-list)
	  (pl chart-face-pixmap-list)
	  nf)
      (while cl
	(setq nf (make-face (intern (concat "chart-" (car cl) "-" (car pl)))))
	(if (condition-case nil
		(> (x-display-color-cells) 4)
	      (error t))
	    (set-face-background nf (car cl))
	  (set-face-background nf "white"))
	(set-face-foreground nf "black")
	(if (and chart-face-use-pixmaps
		 pl
		 (fboundp 'set-face-background-pixmap))
	    (condition-case nil
		(set-face-background-pixmap nf (car pl))
	      (error (message "Cannot set background pixmap %s" (car pl)))))
	(setq chart-face-list (cons nf chart-face-list))
	(setq cl (cdr cl)
	      pl (cdr pl)))))

(defun chart-mode ()
  "Define a mode in Emacs for displaying a chart."
  (kill-all-local-variables)
  (use-local-map chart-map)
  (setq major-mode 'chart-mode
	mode-name "CHART")
  (run-hooks 'chart-mode-hook)
  )

(defun chart-new-buffer (obj)
  "Create a new buffer NAME in which the chart OBJ is displayed.
Returns the newly created buffer"
  (save-excursion
    (set-buffer (get-buffer-create (format "*%s*" (oref obj title))))
    (chart-mode)
    (setq chart-local-object obj)
    (current-buffer)))

(defclass chart ()
  ((title :initarg :title
	  :initform "Emacs Chart")
   (title-face :initarg :title-face
	       :initform 'bold-italic)
   (x-axis :initarg :x-axis
	   :initform nil )
   (x-margin :initarg :x-margin
	     :initform 5)
   (x-width :initarg :x-width
	    )
   (y-axis :initarg :y-axis
	   :initform nil)
   (y-margin :initarg :y-margin
	     :initform 5)
   (y-width :initarg :y-width
	    )
   (key-label :initarg :key-label
	      :initform "Key")
   (sequences :initarg :sequences
	      :initform nil)
   )
  "Superclass for all charts to be displayed in an emacs buffer")

(defmethod initialize-instance :AFTER ((obj chart) &rest fields)
  "Initialize the chart OBJ being created with FIELDS.
Make sure the width/height is correct."
  (oset obj x-width (- (window-width) 10))
  (oset obj y-width (- (window-height) 12)))

(defclass chart-axis ()
  ((name :initarg :name
	 :initform "Generic Axis")
   (loweredge :initarg :loweredge
	      :initform t)
   (name-face :initarg :name-face
	      :initform 'bold)
   (labels-face :initarg :lables-face
		:initform 'italic)
   (chart :initarg :chart
	  :initform nil)
   )
  "Superclass used for display of an axis.")

(defclass chart-axis-range (chart-axis)
  ((bounds :initarg :bounds
	   :initform '(0.0 . 50.0))
   )
  "Class used to display an axis defined by a range of values")

(defclass chart-axis-names (chart-axis)
  ((items :initarg :items
	  :initform nil)
   )
  "Class used to display an axis which represents different named items")

(defclass chart-sequece ()
  ((data :initarg :data
	 :initform nil)
   (name :initarg :name
	 :initform "Data")
   )
  "Class used for all data in different charts")

(defclass chart-bar (chart)
  ((direction :initarg :direction
	      :initform vertical))
  "Subclass for bar charts. (Vertical or horizontal)")

(defmethod chart-draw ((c chart) &optional buff)
  "Start drawing a chart object C in optional BUFF.
Erases current contents of buffer"
  (save-excursion
    (if buff (set-buffer buff))
    (erase-buffer)
    (insert (make-string 100 ?\n))
    ;; Start by displaying the axis
    (chart-draw-axis c)
    ;; Display title
    (chart-draw-title c)
    ;; Display data
    (message "Rendering chart...")
    (sit-for 0)
    (chart-draw-data c)
    ;; Display key
    ; (chart-draw-key c)
    (message "Rendering chart...done")
    ))

(defmethod chart-draw-title ((c chart))
  "Draw a title upon the chart.
Argument C is the chart object."
  (chart-display-label (oref c title) 'horizontal 0 0 (window-width)
		       (oref c title-face)))

(defmethod chart-size-in-dir ((c chart) dir)
  "Return the physical size of chart C in direction DIR."
  (if (eq dir 'vertical)
      (oref c y-width)
    (oref c x-width)))

(defmethod chart-draw-axis ((c chart))
  "Draw axis into the current buffer defined by chart C."
  (let ((ymarg (oref c y-margin))
	(xmarg (oref c x-margin))
	(ylen (oref c y-width))
	(xlen (oref c x-width)))
    (chart-axis-draw (oref c y-axis) 'vertical ymarg
		     (if (oref (oref c y-axis) loweredge) nil xlen)
		     xmarg (+ xmarg ylen))
    (chart-axis-draw (oref c x-axis) 'horizontal xmarg
		     (if (oref (oref c x-axis) loweredge) nil ylen)
		     ymarg (+ ymarg xlen)))
  )

(defmethod chart-axis-draw ((a chart-axis) &optional dir margin zone start end)
  "Draw some axis for A in direction DIR at with MARGIN in boundry.
ZONE is a zone specification.
START and END represent the boundary."
  (chart-draw-line dir (+ margin (if zone zone 0)) start end)
  (chart-display-label (oref a name) dir (if zone (+ zone margin 3)
					   (if (eq dir 'horizontal)
					       1 0))
		       start end (oref a name-face)))

(defmethod chart-translate-xpos ((c chart) x)
  "Translate in chart C the coordinate X into a screen column."
  (let ((range (oref (oref c x-axis) bounds)))
    (+ (oref c x-margin)
       (round (* (float (- x (car range)))
		 (/ (float (oref c x-width))
		    (float (- (cdr range) (car range))))))))
  )

(defmethod chart-translate-ypos ((c chart) y)
  "Translate in chart C the coordinate Y into a screen row."
  (let ((range (oref (oref c y-axis) bounds)))
    (+ (oref c x-margin)
       (- (oref c y-width)
	  (round (* (float (- y (car range)))
		    (/ (float (oref c y-width))
		       (float (- (cdr range) (car range)))))))))
  )

(defmethod chart-axis-draw ((a chart-axis-range) &optional dir margin zone start end)
  "Draw axis information based upon a range to be spread along the edge.
A is the chart to draw.  DIR is the direction.
MARGIN, ZONE, START, and END specify restrictions in chart space."
  (call-next-method)
  ;; We prefer about 5 spaces between each value
  (let* ((i (car (oref a bounds)))
	 (e (cdr (oref a bounds)))
	 (z (if zone zone 0))
	 (s nil)
	 (rng (- e i))
	 ;; want to jump by units of 5 spaces or so
	 (j (/ rng (/  (chart-size-in-dir (oref a chart) dir) 4)))
	 p1)
    (if (= j 0) (setq j 1))
    (while (<= i e)
      (setq s
	    (cond ((> i 999999)
		   (format "%dM" (/ i 1000000)))
		  ((> i 999)
		   (format "%dK" (/ i 1000)))
		  (t
		   (format "%d" i))))
      (if (eq dir 'vertical)
	  (let ((x (+ (+ margin z) (if (oref a loweredge)
				       (- (length s)) 1))))
	    (if (< x 1) (setq x 1))
	    (chart-goto-xy x (chart-translate-ypos (oref a chart) i)))
	(chart-goto-xy (chart-translate-xpos (oref a chart) i)
		       (+ margin z (if (oref a loweredge) -1 1))))
      (setq p1 (point))
      (insert s)
      (chart-zap-chars (length s))
      (put-text-property p1 (point) 'face (oref a labels-face))
      (setq i (+ i j))))
)

(defmethod chart-translate-namezone ((c chart) n)
  "Return a dot-pair representing a positional range for a name.
The name in chart C of the Nth name resides.
Automatically compensates for for direction."
  (let* ((dir (oref c direction))
	 (w (if (eq dir 'vertical) (oref c x-width) (oref c y-width)))
	 (m (if (eq dir 'vertical) (oref c y-margin) (oref c x-margin)))
	 (ns (length
	      (oref (if (eq dir 'vertical) (oref c x-axis) (oref c y-axis))
		    items)))
	 (lpn (/ (+ 1.0 (float w)) (float ns)))
	 )
    (cons (+ m (round (* lpn (float n))))
	  (+ m -1 (round (* lpn (+ 1.0 (float n))))))
    ))

(defmethod chart-axis-draw ((a chart-axis-names) &optional dir margin zone start end)
  "Draw axis information based upon A range to be spread along the edge.
Optional argument DIR the direction of the chart.
Optional argument MARGIN , ZONE, START and END specify boundaries of the drawing."
  (call-next-method)
  ;; We prefer about 5 spaces between each value
  (let* ((i 0)
	 (s (oref a items))
	 (z (if zone zone 0))
	 (r nil)
	 (p nil)
	 (odd nil)
	 p1)
    (while s
      (setq odd (= (% (length s) 2) 1))
      (setq r (chart-translate-namezone (oref a chart) i))
      (if (eq dir 'vertical)
	  (setq p (/ (+ (car r) (cdr r)) 2))
	(setq p (- (+ (car r) (/ (- (cdr r) (car r)) 2))
		   (/ (length (car s)) 2))))
      (if (eq dir 'vertical)
	  (let ((x (+ (+ margin z) (if (oref a loweredge)
				       (- (length (car s)))
				     (length (car s))))))
	    (if (< x 1) (setq x 1))
	    (if (> (length (car s)) (1- margin))
		(setq x (+ x margin)))
	    (chart-goto-xy x p))
	(chart-goto-xy p (+ (+ margin z) (if (oref a loweredge)
					     (if odd -2 -1)
					   (if odd 2 1)))))
      (setq p1 (point))
      (insert (car s))
      (chart-zap-chars (length (car s)))
      (put-text-property p1 (point) 'face (oref a labels-face))
      (setq i (+ i 1)
	    s (cdr s))))
)

(defmethod chart-draw-data ((c chart-bar))
  "Display the data available in a bar chart C."
  (let* ((data (oref c sequences))
	 (dir (oref c direction))
	 (odir (if (eq dir 'vertical) 'horizontal 'vertical))
	)
    (while data
      (if (stringp (car (oref (car data) data)))
	  ;; skip string lists...
	  nil
	;; display number lists...
	(let ((i 0)
	      (seq (oref (car data) data)))
	  (while seq
	    (let* ((rng (chart-translate-namezone c i))
		   (dp (if (eq dir 'vertical)
			   (chart-translate-ypos c (car seq))
			 (chart-translate-xpos c (car seq))))
		  (zp (if (eq dir 'vertical)
			  (chart-translate-ypos c 0)
			(chart-translate-xpos c 0)))
		  (fc (if chart-face-list
			  (nth (% i (length chart-face-list)) chart-face-list)
			'default))
		  )
	      (if (< dp zp)
		  (progn
		    (chart-draw-line dir (car rng) dp zp)
		    (chart-draw-line dir (cdr rng) dp zp))
		(chart-draw-line dir (car rng) zp (1+ dp))
		(chart-draw-line dir (cdr rng) zp (1+ dp)))
	      (if (= (car rng) (cdr rng)) nil
		(chart-draw-line odir dp (1+ (car rng)) (cdr rng))
		(chart-draw-line odir zp (car rng) (1+ (cdr rng))))
	      (if (< dp zp)
		  (chart-deface-rectangle dir rng (cons dp zp) fc)
		(chart-deface-rectangle dir rng (cons zp dp) fc))
	      )
	    ;; find the bounds, and chart it!
	    ;; for now, only do one!
	    (setq i (1+ i)
		  seq (cdr seq)))))
      (setq data (cdr data))))
  )

(defmethod chart-add-sequence ((c chart) &optional seq axis-label)
  "Add to chart object C the sequence object SEQ.
If AXIS-LABEL, then the axis stored in C is updated with the bounds of SEQ,
or is created with the bounds of SEQ."
  (if axis-label
      (let ((axis (eieio-oref c axis-label)))
	(if (stringp (car (oref seq data)))
	    (let ((labels (oref seq data)))
	      (if (not axis)
		  (setq axis (make-instance chart-axis-names
					    :name (oref seq name)
					    :items labels
					    :chart c))
		(oset axis items labels)))
	  (let ((range (cons 0 1))
		(l (oref seq data)))
	    (if (not axis)
		(setq axis (make-instance chart-axis-range
					  :name (oref seq name)
					  :chart c)))
	    (while l
	      (if (< (car l) (car range)) (setcar range (car l)))
	      (if (> (car l) (cdr range)) (setcdr range (car l)))
	      (setq l (cdr l)))
	    (oset axis bounds range)))
	(if (eq axis-label 'x-axis) (oset axis loweredge nil))
	(eieio-oset c axis-label axis)
	))
  (oset c sequences (append (oref c sequences) (list seq))))

;;; Charting optimizers

(defmethod chart-trim ((c chart) max)
  "Trim all sequences in chart C to be at most MAX elements long."
  (let ((s (oref c sequences)))
    (while s
      (let ((sl (oref (car s) data)))
	(if (> (length sl) max)
	    (setcdr (nthcdr (1- max) sl) nil)))
      (setq s (cdr s))))
  )

(defmethod chart-sort ((c chart) pred)
  "Sort the data in chart C using predicate PRED.
See `chart-sort-matchlist' for more details"
  (let* ((sl (oref c sequences))
	 (s1 (car sl))
	 (s2 (car (cdr sl)))
	 (s nil))
    (if (stringp (car (oref s1 data)))
	(progn
	  (chart-sort-matchlist s1 s2 pred)
	  (setq s (oref s1 data)))
      (if (stringp (car (oref s2 data)))
	  (progn
	    (chart-sort-matchlist s2 s1 pred)
	    (setq s (oref s2 data)))
	(error "Sorting of chart %s not supported" (object-name c))))
    (if (eq (oref c direction) 'horizontal)
	(oset (oref c y-axis) items s)
      (oset (oref c x-axis) items s)
	))
  )

(defun chart-sort-matchlist (namelst numlst pred)
  "Sort NAMELST and NUMLST (both SEQUENCE objects) based on predicate PRED.
PRED should be the equivalent of '<, except it must expect two
cons cells of the form (NAME . NUM).  See SORT for more details."
  ;; 1 - create 1 list of cons cells
  (let ((newlist nil)
	(alst (oref namelst data))
	(ulst (oref numlst data)))
    (while alst
      ;; this is reversed, but were are sorting anyway
      (setq newlist (cons (cons (car alst) (car ulst)) newlist))
      (setq alst (cdr alst)
	    ulst (cdr ulst)))
    ;; 2 - Run sort routine on it
    (setq newlist (sort newlist pred)
	  alst nil
	  ulst nil)
    ;; 3 - Separate the lists
    (while newlist
      (setq alst (cons (car (car newlist)) alst)
	    ulst (cons (cdr (car newlist)) ulst))
      (setq newlist (cdr newlist)))
    ;; 4 - Store them back
    (oset namelst data (reverse alst))
    (oset numlst data (reverse ulst))))

;;; Utilities

(defun chart-goto-xy (x y)
  "Move cursor to position X Y in buffer, and add spaces and CRs if needed."

  (let ((indent-tabs-mode nil)
	(num (goto-line (1+ y))))
    (if (and (= 0 num) (/= 0 (current-column))) (newline 1))
    (if (eobp) (newline num))
    (if (< x 0) (setq x 0))
    (if (< y 0) (setq y 0))
    ;; Now, a quicky column moveto/forceto method.
    (or (= (move-to-column x) x)
	(let ((p (point)))
	  (indent-to x)
	  (remove-text-properties p (point) '(face))))))

(defun chart-zap-chars (n)
  "Zap up to N chars without deleteting EOLs."
  (if (not (eobp))
      (if (< n (- (save-excursion (end-of-line) (point)) (point)))
	  (delete-char n)
	(delete-region (point) (save-excursion (end-of-line) (point))))))

(defun chart-display-label (label dir zone start end &optional face)
  "Display LABEL in direction DIR in column/row ZONE between START and END.
Optional argument FACE is the property we wish to place on this text."
  (if (eq dir 'horizontal)
      (let (p1)
	(chart-goto-xy (+ start (- (/ (- end start) 2) (/ (length label) 2)))
		       zone)
	(setq p1 (point))
	(insert label)
	(chart-zap-chars (length label))
	(put-text-property p1 (point) 'face face)
	)
    (let ((i 0)
	  (stz (+ start (- (/ (- end start) 2) (/ (length label) 2)))))
      (while (< i (length label))
	(chart-goto-xy zone (+ stz i))
	(insert (aref label i))
	(chart-zap-chars 1)
	(put-text-property (1- (point)) (point) 'face face)
	(setq i (1+ i))))))

(defun chart-draw-line (dir zone start end)
  "Draw a line using line-drawing characters in direction DIR.
Use column or row ZONE between START and END"
  (chart-display-label
   (make-string (- end start) (if (eq dir 'vertical) ?| ?\-))
   dir zone start end))

(defun chart-deface-rectangle (dir r1 r2 face)
  "Colorize a rectangle in direction DIR across range R1 by range R2.
R1 and R2 are dotted pairs.  Colorize it with FACE."
  (let* ((range1 (if (eq dir 'vertical) r1 r2))
	 (range2 (if (eq dir 'vertical) r2 r1))
	 (y (car range2)))
    (while (<= y (cdr range2))
      (chart-goto-xy (car range1) y)
      (put-text-property (point) (+ (point) (1+ (- (cdr range1) (car range1))))
			 'face face)
      (setq y (1+ y)))))

;;; Helpful `I don't want to learn eieio just now' washover functions

(defun chart-bar-quickie (dir title namelst nametitle numlst numtitle
			      &optional max sort-pred)
  "Wash over the complex eieio stuff and create a nice bar chart.
Creat it going in direction DIR ['horizontal 'vertical] with TITLE
using a name sequence NAMELST labeled NAMETITLE with values NUMLST
labeled NUMTITLE.
Optional arguments:
Set the charts' max element display to MAX, and sort lists with
SORT-PRED if desired."
  (let ((nc (make-instance chart-bar
			   :title title
			   :key-label "8-m"  ; This is a text key pic
			   :direction dir
			   ))
	(iv (eq dir 'vertical)))
    (chart-add-sequence nc
			(make-instance chart-sequece
				       :data namelst
				       :name nametitle)
			(if iv 'x-axis 'y-axis))
    (chart-add-sequence nc
			(make-instance chart-sequece
				       :data numlst
				       :name numtitle)
			(if iv 'y-axis 'x-axis))
    (if sort-pred (chart-sort nc sort-pred))
    (if (integerp max) (chart-trim nc max))
    (switch-to-buffer (chart-new-buffer nc))
    (chart-draw nc)))

;;; Test code

(defun chart-test-it-all ()
  "Test out various charting features."
  (interactive)
  (chart-bar-quickie 'vertical "Test Bar Chart"
		     '( "U1" "ME2" "C3" "B4" "QT" "EZ") "Items"
		     '( 5 -10 23 20 30 -3) "Values")
  )

;;; Sample utility function

(defun chart-file-count (dir)
  "Draw a chart displaying the number of different file extentions in DIR."
  (interactive "DDirectory: ")
  (if (not (string-match "/$" dir))
      (setq dir (concat dir "/")))
  (message "Collecting statistics...")
  (let ((flst (directory-files dir nil nil t))
	(extlst (list "<dir>"))
	(cntlst (list 0)))
    (while flst
      (let* ((j (string-match "[^\\.]\\(\\.[a-zA-Z]+\\|~\\|#\\)$" (car flst)))
	     (s (if (file-accessible-directory-p (concat dir (car flst)))
		    "<dir>"
		  (if j
		      (substring (car flst) (match-beginning 1) (match-end 1))
		    nil)))
	     (m (member s extlst)))
	(if (not s) nil
	  (if m
	      (let ((cell (nthcdr (- (length extlst) (length m)) cntlst)))
		(setcar cell (1+ (car cell))))
	    (setq extlst (cons s extlst)
		  cntlst (cons 1 cntlst)))))
      (setq flst (cdr flst)))
    ;; Lets create the chart!
    (chart-bar-quickie 'vertical "Files Extension Distribution"
		       extlst "File Extensions"
		       cntlst "# of occurances"
		       10
		       '(lambda (a b) (> (cdr a) (cdr b))))
    ))

(defun chart-space-usage (d)
  "Display a top usage chart for directory D."
  (interactive "DDirectory: ")
  (message "Collecting statistics...")
  (let ((nmlst nil)
	(cntlst nil)
	(b (get-buffer-create " *du-tmp*")))
    (set-buffer b)
    (erase-buffer)
    (insert "cd " d ";du -sk * \n")
    (message "Running `cd %s;du -sk *'..." d)
    (call-process-region (point-min) (point-max) "csh" t
			 (current-buffer) nil)
    (goto-char (point-min))
    (message "Scanning output ...")
    (while (re-search-forward "^\\([0-9]+\\)[ \t]+\\([^ \n]+\\)$" nil t)
      (let* ((nam (buffer-substring (match-beginning 2) (match-end 2)))
	     (num (buffer-substring (match-beginning 1) (match-end 1))))
	(setq nmlst (cons nam nmlst)
	      ;; * 1000 to put it into bytes
	      cntlst (cons (* (string-to-int num) 1000) cntlst))))
    (if (not nmlst)
	(error "No files found!"))
    (chart-bar-quickie 'vertical (format "Largest files in %s" d)
		       nmlst "File Name"
		       cntlst "File Size"
		       10
		       '(lambda (a b) (> (cdr a) (cdr b))))
    ))

(defun chart-emacs-storage ()
  "Chart the current storage requirements of Emacs."
  (interactive)
  (let* ((data (garbage-collect))
	 (names '("strings/2" "vectors"
		  "conses" "free cons"
		  "syms" "free syms"
		  "markers" "free mark"
		  ;; "floats" "free flt"
		  ))
	 (nums (list (/ (nth 3 data) 2)
		     (nth 4 data)
		     (car (car data))	; conses
		     (cdr (car data))
		     (car (nth 1 data)) ; syms
		     (cdr (nth 1 data))
		     (car (nth 2 data))	; markers
		     (cdr (nth 2 data))
		     ;(car (nth 5 data)) ; floats are Emacs only
		     ;(cdr (nth 5 data))
		     )))
    ;; Lets create the chart!
    (chart-bar-quickie 'vertical "Emacs Runtime Storage Usage"
		       names "Storage Items"
		       nums "Objects")))

(defun chart-emacs-lists ()
  "Chart out the size of various important lists."
  (interactive)
  (let* ((names '("buffers" "frames" "processes" "faces"))
	 (nums (list (length (buffer-list))
		     (length (frame-list))
		     (length (process-list))
		     (length (face-list))
		     )))
    (if (fboundp 'x-display-list)
	(setq names (append names '("x-displays"))
	      nums (append nums (list (length (x-display-list))))))
    ;; Lets create the chart!
    (chart-bar-quickie 'vertical "Emacs List Size Chart"
		       names "Various Lists"
		       nums "Objects")))

(defun chart-rmail-from ()
  "If we are in an rmail summary buffer, then chart out the froms."
  (interactive)
  (if (not (eq major-mode 'rmail-summary-mode))
      (error "You must invoke chart-rmail-from in an rmail summary buffer"))
  (let ((nmlst nil)
	(cntlst nil))
    (save-excursion
      (goto-char (point-min))
      (while (re-search-forward "\\-[A-Z][a-z][a-z] +\\(\\w+\\)@\\w+" nil t)
	(let* ((nam (buffer-substring (match-beginning 1) (match-end 1)))
	       (m (member nam nmlst)))
	  (message "Scanned username %s" nam)
	  (if m
	      (let ((cell (nthcdr (- (length nmlst) (length m)) cntlst)))
		(setcar cell (1+ (car cell))))
	    (setq nmlst (cons nam nmlst)
		  cntlst (cons 1 cntlst))))))
    (chart-bar-quickie 'vertical "Username Occurance in RMAIL box"
		       nmlst "User Names"
		       cntlst "# of occurances"
		       10
		       '(lambda (a b) (> (cdr a) (cdr b))))
    ))


(provide 'chart)

;;; chart.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.