speedbar / dframe.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
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
;;; dframe --- dedicate frame support modes

;;; Copyright (C) 1996, 97, 98, 99, 00 Free Software Foundation

;; Author: Eric M. Ludlam <zappo@gnu.org>
;; Keywords: file, tags, tools
;; X-RCS: $Id$

(defvar dframe-version "1.0beta"
  "The current version of the dedicated frame library.")

;; This file is part of GNU Emacs.

;; GNU Emacs 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.

;; GNU Emacs 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 GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Commentary:
;;
;; This code was developed and maintained as a part of speedbar since 1996.
;; It became its own support utility in Aug 2000.
;;
;; Dedicated frame mode is an Emacs independent library for supporting
;; a program/buffer combination that resides in a dedicated frame.
;; Support of this nature requires several complex interactions with the
;; user which this library will provide, including:
;;
;; * Creation of a frame.  Positioned relatively.
;;   Includes a frame cache for User position caching.
;; * Switching between frames.
;; * Timed activities using idle-timers
;; * Frame/buffer killing hooks
;; * Mouse-3 position relative menu
;; * Mouse motion, help-echo hacks
;; * Mouse clicking, double clicking, & Xemacs image clicking hack
;; * Mode line hacking
;; * Utilities for use in a program covering:
;;    o keymap massage for some actions
;;    o working with an associated buffer
;;    o shift-click
;;    o detaching a frame
;;    o focus-shifting & optional frame jumping
;;    o currently active frame.
;;    o message/y-or-n-p
;;    o mouse set point
;;
;; To Use:
;; 1) (require 'dframe)
;; 2) Variable Setup:
;;   -frame-parameters -- Frame parameters for Emacs.
;;   -frame-plist -- Frame parameters for XEmacs.
;;   -- Not on parameter lists: They can optionally include width
;;      and height.  If width or height is not included, then it will
;;      be provided to match the originating frame.  In general,
;;      turning off the menu bar, mode line, and minibuffer can
;;      provide a smaller window, or more display area.
;;   -track-mouse-flag -- mouse tracking on/off specific to your tool.
;;   -update-flag -- app toggle for timer use.  Init from
;;     `dframe-have-timer-flag'.  This is nil for terminals, since
;;     updating a frame in a terminal is not useful to the user.
;;   -key-map -- Your keymap.  Call `dframe-update-keymap' on it.
;;   -buffer, -frame, -cached-frame -- Variables used to track your
;;     applications buffer, frame, or frame cache (when hidden).  See
;;     `dframe-frame-mode' for details.
;;   -before-delete-hook, -before-popup-hook, -after-create-hook --
;;     Hooks to have called.  The `-after-create-hook' probably wants
;;     to call a function which calls `dframe-reposition-frame' in an
;;     appropriate manner.
;; 3) Function Setup:
;;   your-frame-mode -- function to toggle your app frame on and off.
;;     its tasks are:
;;       a) create a buffer
;;       b) Call `dframe-frame-mode'.  (See its doc)
;;       c) If successful (your -frame variable has a value), call
;;          timer setup if applicable.
;;   your-frame-reposition- -- Function to call from after-create-hook to
;;     reposition your frame with `dframe-repsoition-frame'.
;;   your-mode -- Set up the major mode of the buffer for your app.
;;     Set these variables: dframe-track-mouse-function,
;;                          dframe-help-echo-function,
;;                          dframe-mouse-click-function,
;;                          dframe-mouse-position-function.
;;   See speedbar's implementation of these functions.
;;    `speedbar-current-frame', `speedbar-get-focus', `speedbar-message',
;;    `speedbar-y-or-n-p', `speedbar-set-timer', `speedbar-click',
;;    `speedbar-position-cursor-on-line'
;; 4) Handling mouse clicks, and help text:
;;   dframe-track-mouse, dframe-help-echo-function --
;;    These variables need to be set to functions that display info
;;    based on the mouse's position.
;;   Text propert 'help-echo, set to `dframe-help-echo', which will
;;    call `dframe-help-echo-function'.
;;   Have a `-click' function, it can call `dframe-quick-mouse' for
;;    positioning.  If the variable `dframe-power-click' is non-nil,
;;    then `shift' was held down during the click.

;;; Bugs
;;
;;  * The timer managers doesn't handle multiple different timeouts.
;;  * You can't specify continuous timouts (as opposed to just lidle timers.)

;;; Code:
(defvar dframe-xemacsp (string-match "XEmacs" emacs-version)
  "Non-nil if we are running in the XEmacs environment.")
(defvar dframe-xemacs20p (and dframe-xemacsp
			      (>= emacs-major-version 20)))

;; From custom web page for compatibility between versions of custom
;; with help from ptype@dera.gov.uk (Proto Type)
(eval-and-compile
  (condition-case ()
      (require 'custom)
    (error nil))
  (if (and (featurep 'custom) (fboundp 'custom-declare-variable)
	   ;; Some XEmacsen w/ custom don't have :set keyword.
	   ;; This protects them against custom.
	   (fboundp 'custom-initialize-set))
      nil ;; We've got what we needed
    ;; We have the old custom-library, hack around it!
    (if (boundp 'defgroup)
	nil
      (defmacro defgroup (&rest args)
	nil))
    (if (boundp 'defface)
	nil
      (defmacro defface (var values doc &rest args)
	(` (progn
	     (defvar (, var) (quote (, var)))
	     ;; To make colors for your faces you need to set your .Xdefaults
	     ;; or set them up ahead of time in your .emacs file.
	     (make-face (, var))
	     ))))
    (if (boundp 'defcustom)
	nil
      (defmacro defcustom (var value doc &rest args)
	(` (defvar (, var) (, value) (, doc)))))))


;;; Compatibility functions
;;
(if (fboundp 'frame-parameter)

    (defalias 'dframe-frame-parameter 'frame-parameter)
  
  (defun dframe-frame-parameter (frame parameter)
    "Return FRAME's PARAMETER value."
    (cdr (assoc parameter (frame-parameters frame)))))


;;; Variables
;;
(defgroup dframe nil
  "Faces used in dframe."
  :prefix "dframe-"
  :group 'dframe)

(defvar dframe-have-timer-flag
  (and (or (fboundp 'run-with-idle-timer)
	   (fboundp 'start-itimer)
	   (boundp 'post-command-idle-hook))
       (if (fboundp 'display-graphic-p)
	   (display-graphic-p)
	 window-system))
  "Non-nil means that timers are available for this Emacs.")

(defcustom dframe-update-speed
  (if dframe-xemacsp
      (if dframe-xemacs20p
	  2				; 1 is too obrusive in XEmacs
	5)				; when no idleness, need long delay
    1)
  "*Idle time in seconds needed before dframe will update itself.
Updates occur to allow dframe to display directory information
relevant to the buffer you are currently editing."
  :group 'dframe
  :type 'integer)

(defcustom dframe-activity-change-focus-flag nil
  "*Non-nil means the selected frame will change based on activity.
Thus, if a file is selected for edit, the buffer will appear in the
selected frame and the focus will change to that frame."
  :group 'dframe
  :type 'boolean)

(defvar dframe-track-mouse-function nil
  "*A function to call when the mouse is moved in the given frame.
Typically used to display info about the line under the mouse.")
(make-variable-buffer-local 'dframe-track-mouse-function)

(defvar dframe-help-echo-function nil
  "*A function to call when help-echo is used in newer versions of Emacs.
Typically used to display info about the line under the mouse.")
(make-variable-buffer-local 'dframe-help-echo-function)

(defvar dframe-mouse-click-function nil
  "*A function to call when the mouse is clicked.
Valid clicks are mouse 2, our double mouse 1.")
(make-variable-buffer-local 'dframe-mouse-click-function)

(defvar dframe-mouse-position-function nil
  "*A function to called to position the cursor for a mouse click.")
(make-variable-buffer-local 'dframe-mouse-position-function)

(defvar dframe-power-click nil
  "Never set this by hand.  Value is t when S-mouse activity occurs.")

(defvar dframe-timer nil
  "The dframe timer used for updating the buffer.")

(defvar dframe-attached-frame nil
  "The frame which started a frame mode.
This is the frame from which all interesting activities will go
for the mode using dframe.")

(defvar dframe-controlled nil
  "Is this buffer controlled by a dedicated frame.
Local to those buffers, as a function called that created it.")
(make-variable-buffer-local 'dframe-controlled)

(defun dframe-update-keymap (map)
  "Update the keymap MAP for dframe default bindings."
  ;; Frame control
  (define-key map "q" 'dframe-close-frame)
  (define-key map "Q" 'delete-frame)

  ;; Override switch to buffer to never hack our frame.
  (substitute-key-definition 'switch-to-buffer
			     'dframe-switch-buffer-attached-frame
			     map global-map)

  (if dframe-xemacsp
      (progn
	;; mouse bindings so we can manipulate the items on each line
	(define-key map 'button2 'dframe-click)
	(define-key map '(shift button2) 'dframe-power-click)
	;; Info doc fix from Bob Weiner
	(if (featurep 'infodoc)
	    nil
	  (define-key map 'button3 'dframe-xemacs-popup-kludge))
	(define-key map '(meta button3) 'dframe-mouse-item-info)
	)

    ;; mouse bindings so we can manipulate the items on each line
    (define-key map [down-mouse-1] 'dframe-double-click)
    (define-key map [mouse-2] 'dframe-click)
    ;; This is the power click for new frames, or refreshing a cache
    (define-key map [S-mouse-2] 'dframe-power-click)
    ;; This adds a small unecessary visual effect
    ;;(define-key map [down-mouse-2] 'dframe-quick-mouse)
    (define-key map [M-mouse-2] 'dframe-mouse-item-info)

    (define-key map [down-mouse-3] 'dframe-emacs-popup-kludge)

    ;; This lets the user scroll as if we had a scrollbar... well maybe not
    (define-key map [mode-line mouse-2] 'dframe-mouse-hscroll)
    ;; another handy place users might click to get our menu.
    (define-key map [mode-line down-mouse-1]
      'dframe-emacs-popup-kludge)

    ;; We can't switch buffers with the buffer mouse menu.  Lets hack it.
    (define-key map [C-down-mouse-1] 'dframe-hack-buffer-menu)

    ;; Lastly, we want to track the mouse.  Play here
    (define-key map [mouse-movement] 'dframe-track-mouse)
    ))

(defun dframe-live-p (frame)
  "Return non-nil if FRAME is currently available."
  (and frame (frame-live-p frame) (frame-visible-p frame)))

(defun dframe-frame-mode (arg frame-var cache-var buffer-var frame-name
			      local-mode-fn
			      &optional
			      parameters
			      delete-hook popup-hook create-hook
			      )
  "Manage a frame for an application, enabling it when ARG is positive.
FRAME-VAR is a variable used to cache the frame being used.
This frame is either resurrected, hidden, killed, etc based on
the value.
CACHE-VAR is a variable used to cache a cached frame.
BUFFER-VAR is a variable used to cache the buffer being used in dframe.
This buffer will have `dframe-mode' run on it.
FRAME-NAME is the name of the frame to create.
LOCAL-MODE-FN is the function used to call this one.
PARAMETERS are frame parameters to apply to this dframe.
DELETE-HOOK are hooks to run when deleting a frame.
POPUP-HOOK are hooks to run before showing a frame.
CREATE-HOOK are hooks to run after creating a frame."
  ;; toggle frame on and off.
  (if (not arg) (if (dframe-live-p (symbol-value frame-var))
		    (setq arg -1) (setq arg 1)))
  ;; Make sure the current buffer is set.
  (set-buffer (symbol-value buffer-var))
  ;; turn the frame off on neg number
  (if (and (numberp arg) (< arg 0))
      (progn
	(run-hooks delete-hook)
	(if (and (symbol-value frame-var)
		 (frame-live-p (symbol-value frame-var)))
	    (progn
	      (set cache-var (symbol-value frame-var))
	      (make-frame-invisible (symbol-value frame-var))))
	(set frame-var nil)
	(make-variable-buffer-local 'dframe-timer)
	)
    ;; Set this as our currently attached frame
    (make-variable-buffer-local 'dframe-attached-frame)
    (setq dframe-attached-frame (selected-frame))
    (run-hooks 'popup-hook)
    ;; Updated the buffer passed in to contain all the hacks needed
    ;; to make it work well in a dedicated window.
    (save-excursion
      (set-buffer (symbol-value buffer-var))
      ;; Declare this buffer a dedicated frame
      (setq dframe-controlled local-mode-fn)

      (if dframe-xemacsp
	  ;; Hack the XEmacs mouse-motion handler
	  (set (make-local-variable 'mouse-motion-handler)
	       'dframe-track-mouse-xemacs)
	;; Enable mouse tracking in emacs
	(if dframe-track-mouse-function
	    (set (make-local-variable 'track-mouse) t))	;this could be messy.
	;; disable auto-show-mode for Emacs
	(setq auto-show-mode nil))
      ;; Set this up special just for the passed in buffer
      ;; Terminal minibuffer stuff does not require this.
      (if (and (or (assoc 'minibuffer parameters)
		   ;; XEmacs plist is not an association list
		   (member 'minibuffer parameters))
	       window-system (not (eq window-system 'pc))
	       (null default-minibuffer-frame))
	  (progn
	    (make-local-variable 'default-minibuffer-frame)
	    (setq default-minibuffer-frame dframe-attached-frame)))
      ;; Override `temp-buffer-show-hook' so that help and such
      ;; put their stuff into a frame other than our own.
      ;; Correct use of `temp-buffer-show-function': Bob Weiner
      (if (and (boundp 'temp-buffer-show-hook)
	       (boundp 'temp-buffer-show-function))
	  (progn (make-local-variable 'temp-buffer-show-hook)
		 (setq temp-buffer-show-hook temp-buffer-show-function)))
      (make-local-variable 'temp-buffer-show-function)
      (setq temp-buffer-show-function 'dframe-temp-buffer-show-function)
      ;; If this buffer is killed, we must make sure that we destroy
      ;; the frame the dedicated window is in.
      (make-local-hook 'kill-buffer-hook)
      (add-hook 'kill-buffer-hook `(lambda ()
				     (let ((skilling (boundp 'skilling)))
				       (if skilling
					   nil
					 (if dframe-controlled
					     (progn
					       (funcall dframe-controlled -1)
					       (setq ,buffer-var nil)
					       )))))
		t t)
      )
    ;; Get the frame to work in
    (if (frame-live-p (symbol-value cache-var))
	(progn
	  (set frame-var (symbol-value cache-var))
	  (make-frame-visible (symbol-value frame-var))
	  (select-frame (symbol-value frame-var))
	  (set-window-dedicated-p (selected-window) nil)
	  (if (not (eq (current-buffer) (symbol-value buffer-var)))
	      (switch-to-buffer (symbol-value buffer-var)))
	  (set-window-dedicated-p (selected-window) t)
	  (raise-frame (symbol-value frame-var))
	  )
      (if (frame-live-p (symbol-value frame-var))
	  (raise-frame (symbol-value frame-var))
	(set frame-var
	      (if dframe-xemacsp
		  ;; Only guess height if it is not specified.
		  (if (member 'height parameters)
		      (make-frame parameters)
		    (make-frame (nconc (list 'height
					     (dframe-needed-height))
				       parameters)))
		(let* ((mh (dframe-frame-parameter dframe-attached-frame
						   'menu-bar-lines))
		       (paramsa
			;; Only add a guessed height if one is not specified
			;; in the input parameters.
			(if (assoc 'height parameters)
			    parameters
			  (append
			   parameters
			   (list (cons 'height (+ mh (frame-height)))))))
		       (params
			;; Only add a guessed width if one is not specified
			;; in the input parameters.
			(if (assoc 'width parameters)
			    paramsa
			  (append
			   paramsa
			   (list (cons 'width (frame-width))))))
		       (frame
			(if (or (< emacs-major-version 20)
				(not (eq window-system 'x)))
			    (make-frame params)
			  (let ((x-pointer-shape x-pointer-top-left-arrow)
				(x-sensitive-text-pointer-shape
				 x-pointer-hand2))
			    (make-frame params)))))
		  frame)))
	;; Put the buffer into the frame
	(save-excursion
	  (select-frame (symbol-value frame-var))
	  (switch-to-buffer (symbol-value buffer-var))
	  (set-window-dedicated-p (selected-window) t))
	;; Run hooks (like reposition)
	(run-hooks 'create-hook)
	;; Frame name
	(if (and (or (null window-system) (eq window-system 'pc))
		 (fboundp 'set-frame-name))
	    (save-window-excursion
	      (select-frame (symbol-value frame-var))
	      (set-frame-name frame-name)))))) )

(defun dframe-reposition-frame (new-frame parent-frame location)
  "Move NEW-FRAME to be relative to PARENT-FRAME.
LOCATION can be one of 'random, 'left-right, or 'top-bottom."
  (if dframe-xemacsp
      (dframe-reposition-frame-xemacs new-frame parent-frame location)
    (dframe-reposition-frame-emacs new-frame parent-frame location)))

(defun dframe-reposition-frame-emacs (new-frame parent-frame location)
  "Move NEW-FRAME to be relative to PARENT-FRAME.
LOCATION can be one of 'random, 'left-right, or 'top-bottom."
  (let* ((pfx (dframe-frame-parameter parent-frame 'left))
	 (pfy (dframe-frame-parameter parent-frame 'top))
	 (pfw (frame-pixel-width parent-frame))
	 (pfh (frame-pixel-height parent-frame))
	 (nfw (frame-pixel-width new-frame))
	 (nfh (frame-pixel-height new-frame))
	 newleft newtop
	 )
    ;; Position dframe.
    (if (or (not window-system) (eq window-system 'pc))
	;; Do no positioning if not on a windowing system,
	nil
      ;; Rebuild pfx,pfy to be absolute positions.
      (setq pfx (if (not (consp pfx))
		    pfx
		  ;; If pfx is a list, that means we grow
		  ;; from a specific edge of the display.
		  ;; Convert that to the distance from the
		  ;; left side of the display.
		  (if (eq (car pfx) '-)
		      ;; A - means distance from the right edge
		      ;; of the display, or DW - pfx - framewidth
		      (- (x-display-pixel-width) (car (cdr pfx)) pfw)
		    (car (cdr pfx))))
	    pfy (if (not (consp pfy))
		    pfy
		  ;; If pfy is a list, that means we grow
		  ;; from a specific edge of the display.
		  ;; Convert that to the distance from the
		  ;; left side of the display.
		  (if (eq (car pfy) '-)
		      ;; A - means distance from the right edge
		      ;; of the display, or DW - pfx - framewidth
		      (- (x-display-pixel-height) (car (cdr pfy)) pfh)
		    (car (cdr pfy))))
	    )
      (cond ((eq location 'left-right)
	     (setq newleft
		   ;; Decide which side to put it on.  200 is just a
		   ;; buffer for the left edge of the screen.  The
		   ;; extra 10 is just dressings for window
		   ;; decorations.
		   (let* ((left-guess (- pfx 10 nfw))
			  (right-guess (+ pfx pfw 5))
			  (left-margin left-guess)
			  (right-margin (- (x-display-pixel-width)
					   right-guess 5 nfw)))
		     (cond ((>= left-margin 0) left-guess)
			   ((>= right-margin 0) right-guess)
			   ;; otherwise choose side we overlap less
			   ((> left-margin right-margin) 0)
			   (t (- (x-display-pixel-width) nfw 5))))
		   newtop pfy
		   ))
	    ((eq location 'top-bottom)
	     )
	    (t nil))
      (modify-frame-parameters new-frame
       (list (cons 'left newleft)
	     (cons 'top newtop))))))

(defun dframe-reposition-frame-xemacs (new-frame parent-frame location)
  "Move NEW-FRAME to be relative to PARENT-FRAME.
LOCATION can be one of 'random, 'left-right, or 'top-bottom."
  ;; Not yet implemented
  )

;; XEmacs function only.
(defun dframe-needed-height (&optional frame)
  "The needed height for the tool bar FRAME (in characters)."
  (or frame (setq frame (selected-frame)))
  ;; The 1 is the missing modeline/minibuffer
  (+ 1 (/ (frame-pixel-height frame)
	  (face-height 'default frame))))

(defun dframe-detach (frame-var cache-var buffer-var)
  "Detatch the frame in symbol FRAME-VAR.
CACHE-VAR and BUFFER-VAR are symbols as in `dframe-frame-mode'"
  (save-excursion
    (set-buffer (symbol-value buffer-var))
    (rename-buffer (buffer-name) t)
    (let ((oldframe (symbol-value frame-var)))
      (set buffer-var nil)
      (set frame-var nil)
      (set cache-var nil)
      (make-variable-buffer-local frame-var)
      (set frame-var oldframe)
      )))


;;; Utilities
;;
(defun dframe-get-focus (frame-var activator &optional hook)
  "Change frame focus to or from a dedicated frame.
If the selected frame is not in the symbol FRAME-VAR, then FRAME-VAR
frame is selected.  If the FRAME-VAR is active, then select the
attached frame.  If FRAME-VAR is nil, ACTIVATOR is called to
created it.  HOOK is an optional argument of hooks to run when
selecting FRAME."
  (interactive)
  (if (eq (selected-frame) (symbol-value frame-var))
      (if (frame-live-p dframe-attached-frame)
	  (select-frame dframe-attached-frame))
    ;; If updates are off, then refresh the frame (they want it now...)
    (run-hooks 'hook)
    ;; make sure we have a frame
    (if (not (frame-live-p (symbol-value frame-var)))
	(funcall activator 1))
    ;; go there
    (select-frame (symbol-value frame-var))
    )
  (other-frame 0))

(defun dframe-close-frame ()
  "Close the current frame if it is dedicated."
  (interactive)
  (if dframe-controlled
      (let ((b (current-buffer)))
	(funcall dframe-controlled -1)
	(kill-buffer b))))

(defun dframe-current-frame (frame-var desired-major-mode)
  "Return the existing dedicated frame to use.
FRAME-VAR is the variable storing the currently active dedicated frame.
If the current frame's buffer uses DESIRED-MAJOR-MODE, then use that frame."
  (if (not (eq (selected-frame) (symbol-value frame-var)))
      (if (and (eq major-mode 'desired-major-mode)
	       (get-buffer-window (current-buffer))
	       (window-frame (get-buffer-window (current-buffer))))
	  (window-frame (get-buffer-window (current-buffer)))
	(symbol-value frame-var))
    (symbol-value frame-var)))

(defun dframe-attached-frame (frame)
  "Return the attached frame belonging to the dframe controlled frame FRAME."
  (save-excursion
    (if frame (select-frame frame))
    dframe-attached-frame))

(defun dframe-select-attached-frame (frame)
  "Switch to the frame the dframe controled frame FRAME was started from."
  (let ((frame (dframe-attached-frame frame)))
    (if frame (select-frame frame) nil)))

(defmacro dframe-with-attached-buffer (&rest forms)
  "Execute FORMS in the attached frame's special buffer.
Optionally select that frame if necessary."
  `(save-selected-window
     ;;(speedbar-set-timer speedbar-update-speed)
     (select-frame dframe-attached-frame)
     ,@forms
     (dframe-maybee-jump-to-attached-frame)))

(defun dframe-maybee-jump-to-attached-frame ()
  "Jump to the attached frame ONLY if this was not a mouse event."
  (if (or (not (dframe-mouse-event-p last-input-event))
	  dframe-activity-change-focus-flag)
      (progn
	;(select-frame dframe-attached-frame)
	(other-frame 0))))

(defvar dframe-suppress-message-flag nil
  "Non-nil means that `dframe-message' should just return a string.")

(defun dframe-message (fmt &rest args)
  "Like message, but for use in a dedicated frame.
Argument FMT is the format string, and ARGS are the arguments for message."
  (save-selected-window
    (if dframe-suppress-message-flag
	(apply 'format fmt args)
      (if dframe-attached-frame
	  (select-frame dframe-attached-frame))
      (apply 'message fmt args))))

(defun dframe-y-or-n-p (prompt)
  "Like `y-or-n-p', but for use in a dedicated frame.
Argument PROMPT is the prompt to use."
  (save-selected-window
    (if (and default-minibuffer-frame
	     dframe-attached-frame
	     (not (eq default-minibuffer-frame dframe-attached-frame)))
	(select-frame dframe-attached-frame))
    (y-or-n-p prompt)))

;;; timer management
;;
;; Unlike speedbar with a dedicated set of routines, dframe has one master
;; timer, and all dframe users will use it.  At least until I figure out a way
;; around that problem.
;;
;; Advantage 1: Two apps with timer/frames can munge the master list
;;              to make sure they occur in order.
;; Advantage 2: If a user hits a key between timer functions, we can
;;	        interrupt them safely.
(defvar dframe-client-functions nil
  "List of client functions using the dframe timer.")

(defun dframe-set-timer (timeout fn &optional null-on-error)
  "Apply a timer TIMEOUT, to call FN, or remove a timer if TIMOUT is nil.
TIMEOUT is the number of seconds until the dframe controled program
timer is called again.  When TIMEOUT is nil, turn off all timeouts.
This function must be called from the buffer belonging to the program
who requested the timer.
If NULL-ON-ERROR is a symbol, set it to nil if we cannot create a timer."
  ;; First, fix up our list of client functions
  (if timeout
      (add-to-list 'dframe-client-functions fn)
    (setq dframe-client-functions (delete fn dframe-client-functions)))
  ;; Now decided what to do about the timout.
  (if (or
       ;; We have a timer, restart the timer with the new time.
       timeout
       ;; We have a timer, an off is requested, and no client
       ;; functions are left, shut er down.
       (and dframe-timer (not timeout) dframe-client-functions))
      ;; Only call the low level function if we are changing the state.
      (dframe-set-timer-internal timeout null-on-error)))

(defun dframe-set-timer-internal (timeout &optional null-on-error)
  "Apply a timer with TIMEOUT to call the dframe timer manager.
If NULL-ON-ERROR is a symbol, set it to nil if we cannot create a timer."
  (cond
   ;; XEmacs
   (dframe-xemacsp
    (if dframe-timer
	(progn (delete-itimer dframe-timer)
	       (setq dframe-timer nil)))
    (if timeout
	(if (and dframe-xemacsp
		 (or (>= emacs-major-version 20)
		     (>= emacs-minor-version 15)))
	    (setq dframe-timer (start-itimer "dframe"
					     'dframe-timer-fn
					     timeout
					     timeout
					     t))
	  (setq dframe-timer (start-itimer "dframe"
					   'dframe-timer-fn
					   timeout
					   nil)))))
   ;; Post 19.31 Emacs
   ((fboundp 'run-with-idle-timer)
    (if dframe-timer
	(progn (cancel-timer dframe-timer)
	       (setq dframe-timer nil)))
    (if timeout
	(setq dframe-timer
	      (run-with-idle-timer timeout t 'dframe-timer-fn))))
   ;; Emacs 19.30 (Thanks twice: ptype@dra.hmg.gb)
   ((fboundp 'post-command-idle-hook)
    (if timeout
	(add-hook 'post-command-idle-hook 'dframe-timer-fn)
      (remove-hook 'post-command-idle-hook 'dframe-timer-fn)))
   ;; Older or other Emacsen with no timers.  Set up so that its
   ;; obvious this emacs can't handle the updates
   ((symbolp null-on-error)
    (set null-on-error nil)))
  )

(defun dframe-timer-fn ()
  "Called due to the dframe timer.
Evaluates all cached timer functions in sequence."
  (let ((l dframe-client-functions))
    (while (and l (sit-for 0))
      (condition-case er
	  (funcall (car l))
	(error (message "DFRAME TIMER ERROR: %S" er)))
      (setq l (cdr l)))))

;;; Menu hacking for mouse-3
;;
;; In XEmacs, we make popup menus work on the item over mouse (as
;; opposed to where the point happens to be.)  We attain this by
;; temporarily moving the point to that place.
;;    Hrvoje Niksic <hniksic@srce.hr>
(defun dframe-xemacs-popup-kludge (event)
  "Pop up a menu related to the clicked on item.
Must be bound to EVENT."
  (interactive "e")
  (save-excursion
    (goto-char (event-closest-point event))
    (beginning-of-line)
    (forward-char (min 5 (- (save-excursion (end-of-line) (point))
			    (save-excursion (beginning-of-line) (point)))))
    (popup-mode-menu)
    ;; Wait for menu to bail out.  `popup-mode-menu' (and other popup
    ;; menu functions) return immediately.
    (let (new)
      (while (not (misc-user-event-p (setq new (next-event))))
	(dispatch-event new))
      (dispatch-event new))))

(defun dframe-emacs-popup-kludge (e)
  "Pop up a menu related to the clicked on item.
Must be bound to event E."
  (interactive "e")
  (save-excursion
    (mouse-set-point e)
    ;; This gets the cursor where the user can see it.
    (if (not (bolp)) (forward-char -1))
    (sit-for 0)
    (if (< emacs-major-version 20)
	(mouse-major-mode-menu e)
      (mouse-major-mode-menu e nil))))

;;; Interactive user functions for the mouse
;;
(if dframe-xemacsp
    (defalias 'dframe-mouse-event-p 'button-press-event-p)
  (defun dframe-mouse-event-p (event)
    "Return t if the event is a mouse related event"
    (if (and (listp event)
	     (member (event-basic-type event)
		     '(mouse-1 mouse-2 mouse-3)))
	t
      nil)))

(defun dframe-track-mouse (event)
  "For motion EVENT, display info about the current line."
  (interactive "e")
  (when dframe-track-mouse-function
    (funcall dframe-track-mouse-function event)))

(defun dframe-track-mouse-xemacs (event)
  "For motion EVENT, display info about the current line."
  (if (functionp (default-value 'mouse-motion-handler))
      (funcall (default-value 'mouse-motion-handler) event))
  (if dframe-track-mouse-function
      (funcall dframe-track-mouse-function event)))

(defun dframe-help-echo (window &optional buffer position)
  "Display help based context.
The context is in WINDOW, viewing BUFFER, at POSITION.
BUFFER and POSITION are optional because XEmacs doesn't use them."
  (when (and (not dframe-track-mouse-function)
	     (bufferp buffer)
	     dframe-help-echo-function)
    (let ((dframe-suppress-message-flag t))
      (with-current-buffer buffer
	(if position (goto-char position))
	(funcall dframe-help-echo-function)))))

(defun dframe-mouse-set-point (e)
  "Set POINT based on event E.
Handles clicking on images in XEmacs."
  (if (and (fboundp 'event-over-glyph-p) (event-over-glyph-p e))
      ;; We are in XEmacs, and clicked on a picture
      (let ((ext (event-glyph-extent e)))
	;; This position is back inside the extent where the
	;; junk we pushed into the property list lives.
	(if (extent-end-position ext)
	    (goto-char (1- (extent-end-position ext)))
	  (mouse-set-point e)))
    ;; We are not in XEmacs, OR we didn't click on a picture.
    (mouse-set-point e)))

(defun dframe-quick-mouse (e)
  "Since mouse events are strange, this will keep the mouse nicely positioned.
This should be bound to mouse event E."
  (interactive "e")
  (dframe-mouse-set-point e)
  (if dframe-mouse-position-function
      (funcall dframe-mouse-position-function)))

(defun dframe-power-click (e)
  "Activate any `dframe' mouse click as a power click.
A power click will dispose of cached data (if available) or bring a buffer
up into a different window.
This should be bound to mouse event E."
  (interactive "e")
  (let ((dframe-power-click t))
    (dframe-click e)))

(defun dframe-click (e)
  "Call our clients click function on a user click.
E is the event causing the click."
  (interactive "e")
  (dframe-mouse-set-point e)
  (funcall dframe-mouse-click-function e))

(defun dframe-double-click (e)
  "Activate the registered click function on a double click.
This must be bound to a mouse event.
This should be bound to mouse event E."
  (interactive "e")
  ;; Emacs only.  XEmacs handles this via `mouse-track-click-hook'.
  (cond ((eq (car e) 'down-mouse-1)
	 (dframe-mouse-set-point e))
	((eq (car e) 'mouse-1)
	 (dframe-quick-mouse e))
	((or (eq (car e) 'double-down-mouse-1)
	     (eq (car e) 'triple-down-mouse-1))
	 (dframe-click e))))

;;; Hacks of normal things.
;;
;; Some normal things that happen in one of these dedicated frames
;; must be handled specially, so that our dedicated frame isn't
;; messed up.
(defun dframe-temp-buffer-show-function (buffer)
  "Placed in the variable `temp-buffer-show-function' in dedicated frames.
If a user requests help using \\[help-command] <Key> the temp BUFFER will be
redirected into a window on the attached frame."
  (if dframe-attached-frame (select-frame dframe-attached-frame))
  (pop-to-buffer buffer nil)
  (other-window -1)
  ;; Fix for using this hook on some platforms: Bob Weiner
  (cond ((not dframe-xemacsp)
	 (run-hooks 'temp-buffer-show-hook))
	((fboundp 'run-hook-with-args)
	 (run-hook-with-args 'temp-buffer-show-hook buffer))
	((and (boundp 'temp-buffer-show-hook)
	      (listp temp-buffer-show-hook))
	 (mapcar (function (lambda (hook) (funcall hook buffer)))
		 temp-buffer-show-hook))))

(defun dframe-hack-buffer-menu (e)
  "Control mouse 1 is buffer menu.
This hack overrides it so that the right thing happens in the main
Emacs frame, not in the dedicated frame.
Argument E is the event causing this activity."
  (interactive "e")
  (let ((fn (lookup-key global-map (if dframe-xemacsp
				              '(control button1)
				     [C-down-mouse-1])))
	(oldbuff (current-buffer))
	(newbuff nil))
    (unwind-protect
	(save-excursion
	  (set-window-dedicated-p (selected-window) nil)
	  (call-interactively fn)
	  (setq newbuff (current-buffer)))
      (switch-to-buffer oldbuff)
      (set-window-dedicated-p (selected-window) t))
    (if (not (eq newbuff oldbuff))
	(dframe-with-attached-buffer
	 (switch-to-buffer newbuff)))))

(defun dframe-switch-buffer-attached-frame (&optional buffer)
  "Switch to BUFFER in the attached frame, and raise that frame.
This overrides the default behavior of `switch-to-buffer' which is
broken because of the dedicated frame."
  (interactive)
  ;; Assume we are in the dedicated frame.
  (other-window 0)
  ;; Now switch buffers
  (if buffer
      (switch-to-buffer buffer)
    (call-interactively 'switch-to-buffer nil nil)))

;; XEmacs: this can be implemented using modeline keymaps, but there
;; is no use, as we have horizontal scrollbar (as the docstring
;; hints.)
(defun dframe-mouse-hscroll (e)
  "Read a mouse event E from the mode line, and horizontally scroll.
If the mouse is being clicked on the far left, or far right of the
mode-line.  This is only useful for non-XEmacs"
  (interactive "e")
  (let* ((xp (car (nth 2 (car (cdr e)))))
	 (cpw (/ (frame-pixel-width)
		 (frame-width)))
	 (oc (1+ (/ xp cpw)))
	 )
    (cond ((< oc 3)
	   (scroll-left 2))
	  ((> oc (- (window-width) 3))
	   (scroll-right 2))
	  (t (dframe-message
	      "Click on the edge of the modeline to scroll left/right")))
    ))

(provide 'dframe)

;;; dframe.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.