Re: Script for creating Application Menu

*cut old message*


- (if (not (boundp'ed desktop-directory (no changeable via rc)
- major update of README part
- added (c) Matthew Love
- NEW TODO Items:
	- case ignoring alphabetize
	- support for Icon= [needs to be implemented in menu first]*
	- support for Comment/[LC]= [menu needs tooltip support first]*
	- support for Name[LC]= [with fallback to Name=]
	- * commented out dummies added (may not work,
		untested as needs changes in menu first)
Have Fun,
;; (mk-saw-menu.jl (v0.5.7) --- sawfish wm menu generation -- librep)

;; (c) 2009 Matthew Love
;; Christopher Bratusek

;; This file will be part of Sawfish

;;; Description:
;; Create a sawfish wm menu from .desktop files
;; in your /usr/share/applications folder.



Make sure the mk-saw-menu.jl is in your load path
(i.e. ~/.sawfish/lisp), then in your .sawfish[/]rc file add:

;; Optional Part, config bits, defaults listed below
;; can be savely skipped, if you're fine with the defaults

;; change xterm -e to your appropriate string (must have
;; a space at the end) 

(setq my-term-string "xterm -e ") 

;; if your .desktop files are located somewhere else than
;; /usr/share/applications, then change the desktop-directory

(setq desktop-directory "/usr/share/applications"))

;; some entries are hidden from the menu, especially GNOME Apps
;; like eog, nautilus or evince & Co, if you want to have them
;; added to your menu, then replace '() by 't in the following

(setq ignore-no-display '())

;; if you don't want your menus to be sorted alphabetically
;; then replace 't by '() in the following

(setq want-alphabetize 't)

;; Necessary part, can't be skipped

;; load our script

(require 'mk-saw-menu)

;; generate the menu


;; load our menu

(require 'saw-menu)

;; set our menu as default

(setq apps-menu saw-apps-menu)


;;; TODO:

;; adhere to the desktop entry file specifications.
;; <a href=""; target="_blank"></a>
;; add support for field codes: <a href=""; target="_blank"></a>
;; add support for Name[lang]=
;; add support for Comment=/Comment[lang]=
;; add support for Icon=
;; add support for ignore-case alphabetizing

;;; Code:

;; Some defaults
(setq my-name ()
      ;my-comm ()
      ;my-icon ()
      my-disp ()
      my-term ()
      my-exec ())

;; Variables that can be set in .sawfish[/]rc
(if (not (boundp 'desktop-directory))
    (setq desktop-directory "/usr/share/applications"))

(setq desk-files (directory-files desktop-directory))

(if (not (boundp 'ignore-no-display))
    (setq ignore-no-display '()))

(if (not (boundp 'want-alphabetize))
    (setq want-alphabetize 't))

(if (not (boundp 'my-term-string))
    (setq my-term-string "xterm -e "))

;; The Master Category List
(setq menu-cat-alist
      '(("Desktop" .  ("X-Desktop" "X-DesktopApplets" "X-DesktopCountry" \
		       "DesktopSettings" "GNOME" "KDE" "X-GNOME-PersonalSettings" \
	("Personal" . ("X-Personal" "X-PersonalUtility" "Calendar" "ContactManagement"))
	("Office" . ("Office" "WordProcessor" "Presentation" "X-Document" \
		     "TextEditor" "SpreadSheet" "Calculator" "X-Calculate" \
		     "Chart" "FlowChart" "Finance"))
	("Internet" . ("Telephony" "Network" "Dialup" "VideoConference" \
		      "RemoteAccess" "News" "HamRadio" "FileTransfer" \
		      "X-Internet" "P2P" "Email" "WebBrowser" "IRCClient" "Chat" \
		      "InstantMessaging" "Chat" "WebDevelopment"))
	("Games" . ("Game" "ActionGame" "AdventureGame" "ArcadeGame" "BoardGame" "Emulator"\
		    "BlocksGame" "CardGame" "KidsGame" "LogicGame" "RolePlaying" "Simulation"))
	("Graphics" . ("RasterGraphics" "VectorGraphics" "X-GraphicUtility" \
		       "2DGraphics" "3dGraphics" "3DGraphics" "Scanning" "OCR" "Photography" \
		       "Viewer" "Publishing" "Art" "ImageProcessing"))
	("Media" . ("AudioVideo" "Audio", "Video" "Midi" "Mixer" "Sequencer" "Tuner" \
		    "TV" "AudioVideoEditing" "Player" "Recorder" "DiscBurning" "Music"))
	("Science" . ("Science" "Astrology" "ArtificialIntelligence" "Astronomy" \
		      "Biology" "Chemistry" "ComputerScience" "DataVisualization" \
		      "Electricity" "Robotics" "Physics" "Math" "Education" "Geography"))
	("Development" . ("GUIDesigner" "IDE" "Profiling" "RevisionControl" \
			  "ProjectManagement" "Translation" "GTK" "Development" \
			  "Qt" "Development" "Documentation"))
	("Utility" . ("X-SystemMemory" "Security" "Utility" \
		      "X-SetupEntry" "X-SetupUtility" "X-SystemMemory" \
		      "TextTools" "TelephonyTools" "Accessibility" "Clock" \
	("Filesystem" .  ("X-FileSystemFind" "X-FileSystemUtility" "Archiving" \
			  "FileManager" "X-FileSystemMount" "Compression"))
	("System" . ("X-SystemSchedule" "System" "X-SystemMemory" \
		     "TerminalEmulator" "Dictionary" "Puppy" "Printing" "Monitor" "Security"))
	("Settings" . ("Settings" "HardwareSettings" "PackageManager"))))

;; Some file-verifiers
(defun desktop-file-p (directory-file)
  (let ((this-file (open-file directory-file 'read)))
    (let ((this-line (read-line this-file)))
      (if (string= (substring this-line 0 15) "[Desktop Entry]")

(defun backup-file-p (input-file-name)
  (if (or (string= "~" (substring input-file-name (- (length input-file-name) 1)))
	  (string= "#" (substring input-file-name 0 1)))

;; Parse a .desktop file into a list suitable for a menu
;; ex. (parse-desktop-file "emacs.desktop") ==> ("Development" "Emacs"
(defun parse-desktop-file (desktop-file)
  (let ((desktop-file-name (expand-file-name desktop-file desktop-directory)))
    (if (and (file-exists-p desktop-file-name)
	     (not (file-directory-p desktop-file-name)))
	     ;(not (backup-file-p desktop-file-name))
	     ;(file-regular-p desktop-file-name))
	(let ((new-file (open-file desktop-file-name 'read)))
	  (while (setq file-line (read-line new-file))
	    (create-menu file-line))
	  (if ignore-no-display
	      (setq my-disp '()))
	  (if (not (string= my-disp "true"))
	      (if (not (string= (string-downcase my-term) "true"))
		  (cons my-cat (cons my-name (cons (list 'system my-exec) nil)))
                  ;(cons my-cat (cons my-icon (cons my-name (cons my-comm (cons (list 'system my-exec) nil)))))
		(cons my-cat (cons my-name (cons (list 'system (concat my-term-string my-exec)) nil))))
                  ;(cons my-cat (cons my-icon (cons my-name (cons my-comm (cons (list 'system (concat my-term-string my-exec)) nil))))))
	    (setq my-disp ()))))))

;; begining of parsing for (parse-desktop-file), feed a .desktop file line into this.
;; (create-menu "Name=Emacs ") ==> "Emacs"
;; (create-menu "Categories=Development;TextEditor;") ==> "Development"
(defun create-menu (line)
   ((parse-desk-line line "Categories=")
    (setq my-cat (parse-desk-line line "Categories=")))
   ((parse-desk-line line "Name=")
    (setq my-name (parse-desk-line line "Name=")))
   ;((parse-desk-line line "Comment=")
   ; (setq my-comm (parse-desk-line line "Comment=")))
   ;((parse-desk-line line "Icon=")
   ; (setq my-icon (parse-desk-line line "Icon=")))
   ((parse-desk-line line "Exec=")
    (setq my-exec (concat (parse-desk-line line "Exec=") " &")))
   ((parse-desk-line line "Terminal=")
    (setq my-term (parse-desk-line line "Terminal=")))
   ((parse-desk-line line "NoDisplay=")
    (setq my-disp (parse-desk-line line "NoDisplay=")))))

;; Helper function for (create-menu), which will parse the string input there.
;; Will only give an output for specified lines (i.e. category, name, etc.)
(defun parse-desk-line (line desk-value)
  (let ((line-len (length line)))
     ; this section is for the exec string
     ((and (> line-len 5) (string= desk-value (substring line 0 5)))
      (if (string= (aref line (- line-len 3)) 37)
	  (substring line 5 (- line-len 4))
	(substring line 5 (- line-len 1))))

     ; this section is for the category string
     ((and (> line-len 10) (string= desk-value (substring line 0 11)))
      (let ((cat-string (parse-cat-list (build-cat-list (substring line 11)))))

     ; this section is for the terminal string
     ((and (> line-len 8) (string= desk-value (substring line 0 9)))
      (substring line 9 (- line-len 1)))

     ; this section is for the nodisplay string
     ((and (> line-len 9) (string= desk-value (substring line 0 10)))
      (substring line 10 (- line-len 1))))))

;; Helper for (parse-desk-line) - specifically, for categories.
(defun build-cat-list (line) ; line must be excluding the \
					; categories= part -> (substring line 11)
  (if (> (length line) 1)
      (let ((line-len (length line))
	    (this-cat (prin1-to-string (read-from-string line))))
	(cons this-cat (build-cat-list (substring line (+ 1 (length this-cat))))))))

;; Helper for (parse-desk-line)
;; Determine best category to use... :|
(defun parse-cat-list (cat-list)
  (if (cdr cat-list)
      (let ((this-cat (car cat-list)))
	(if (or
	     (string= this-cat "GNOME")
	     (string= this-cat "GTK")
	     (string= this-cat "KDE")
             (string= this-cat "Qt")
	     (string= this-cat "X-XFCE")
	     (string= this-cat "Application"))
	    (parse-cat-list (cdr cat-list))
	    ; to do specific things for the above entries (uncomment below, \
					; and comment out the above (parse-cat-list (cdr cat-list)):
	    ;(let ((dm-specific this-cat))
	    ;  (if (or (string= dm-specific "Application")
		;      (string= dm-specific "Qt")
		;      (string= dm-specific "GTK"))
		;  (parse-cat-list (cdr cat-list))
    (car cat-list)))

;; Second Part of process, after (parse-desktop-file) has run \
					; through and generated the *loc-menu*.
;; Will run through the Category alist and assign menu values accordingly, and \
					; will output the base of the menu, to \
					; be fed into (build-saw-menu)
(defun fix-cats (cat-list)
  (if cat-list
      (let ((cat-val (car (car cat-list)))
	    (c-list (fix-sub-cats (car cat-list) *loc-menu*)))
	(if (car c-list)
	    (cons (cons cat-val c-list) (fix-cats (cdr cat-list)))
	  (fix-cats (cdr cat-list))))))

;; Helper function for (fix-cats)
(defun fix-sub-cats (cat-list loc-list)
  (if cat-list
      (let ((cat-val (car cat-list)))
	(if (assoc cat-val loc-list)
	    (cons (cdr (assoc cat-val loc-list))
		  (fix-sub-cats cat-list (remove (assoc cat-val loc-list) loc-list)))
	  (fix-sub-cats (cdr cat-list) loc-list)))))

;; Format the menu for sawfish
(defun build-saw-menu (entry)
  `(defvar saw-apps-menu ',entry))

;; Alphabetize the entries in the category menus
(defun alphabetize-entries (saw-menu)
  (if saw-menu
      (cons (cons (car (car saw-menu)) (sort (cdr (car saw-menu)) string<)) (alphabetize-entries (cdr

;; Write the sawfish menu to file
(defun write-saw-menu ()
  (setq *loc-menu* '())
  ; generate a list (*loc-menu*) from a (parse-desktop-file) call on all the .desktop files
  (mapc (lambda (x)
	  (setq *loc-menu* (append *loc-menu* (list (parse-desktop-file x))))) desk-files)
  ; check if ~/.sawfish/lisp exists, and if not, create it
  (if (not (file-exists-p "~/.sawfish/lisp"))
      (if (file-exists-p "~/.sawfish")
	  (make-directory "~/.sawfish/lisp")
 	(lambda () (make-directory "~/.sawfish") (make-directory "~/.sawfish/lisp"))))
  (setq menu-file (open-file "~/.sawfish/lisp/saw-menu.jl" 'write))
  ; generate the sawfish compatible menu file from the *loc-menu* list
  (if want-alphabetize
      (prin1 (build-saw-menu (alphabetize-entries (fix-cats menu-cat-alist))) menu-file)
    (prin1 (build-saw-menu (fix-cats menu-cat-alist)) menu-file))
  (close-file menu-file))


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