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;;; speedbar --- quick access to files and tags in a frame
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;;; Copyright (C) 1996, 97, 98 Free Software Foundation
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;; Author: Eric M. Ludlam <zappo@gnu.org>
;; Version: 0.7
;; Keywords: file, tags, tools
;; X-RCS: $Id: speedbar.el,v 1.112 1998/06/16 12:53:18 kwzh Exp kwzh $

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;; This file is part of GNU Emacs.
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;; 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.
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;; 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.
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;; 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:
;;
;;   The speedbar provides a frame in which files, and locations in
;; files are displayed.  These items can be clicked on with mouse-2
;; in order to make the last active frame display that file location.
;;
;; Starting Speedbar:
;;
;;   If speedbar came to you as a part of Emacs, simply type
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;; `M-x speedbar', and it will be autoloaded for you.
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;;
;;   If speedbar is not a part of your distribution, then add
;; this to your .emacs file:
;;
;;   (autoload 'speedbar-frame-mode "speedbar" "Popup a speedbar frame" t)
;;   (autoload 'speedbar-get-focus "speedbar" "Jump to speedbar frame" t)
;;
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;;   If you want to choose it from a menu, such as "Tools", you can do this:
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;;
;;   Emacs:
;;   (define-key-after (lookup-key global-map [menu-bar tools])
;;      [speedbar] '("Speedbar" . speedbar-frame-mode) [calendar])
;;
;;   XEmacs:
;;   (add-menu-button '("Tools")
;;		      ["Speedbar" speedbar-frame-mode
;;		       :style toggle
;;		       :selected (and (boundp 'speedbar-frame)
;;				      (frame-live-p speedbar-frame)
;;				      (frame-visible-p speedbar-frame))]
;;		      "--")
;;
;;   If you want to access speedbar using only the keyboard, do this:
;;
;;   (global-set-key [(f4)] 'speedbar-get-focus)
;;
;;   This will let you hit f4 (or whatever key you choose) to jump
;; focus to the speedbar frame.  Pressing it again will bring you back
;; to the attached frame.  Pressing RET or e to jump to a file
;; or tag will move you back to the attached frame.  The command
;; `speedbar-get-focus' will also create a speedbar frame if it does
;; not exist.
;;
;; Customizing Speedbar:
;;
;;   Once a speedbar frame is active, it takes advantage of idle time
;; to keep its contents updated.  The contents is usually a list of
;; files in the directory of the currently active buffer.  When
;; applicable, tags in the active file can be expanded.
;;
;;   To add new supported files types into speedbar, use the function
;; `speedbar-add-supported-extension' If speedbar complains that the
;; file type is not supported, that means there is no built in
;; support from imenu, and the etags part wasn't set up correctly.  You
;; may add elements to `speedbar-supported-extension-expressions' as long
;; as it is done before speedbar is loaded.
;;
;;   To prevent speedbar from following you into certain directories
;; use the function `speedbar-add-ignored-path-regexp' too add a new
;; regular expression matching a type of path.  You may add list
;; elements to `speedbar-ignored-path-expressions' as long as it is
;; done before speedbar is loaded.
;;
;;   To add new file types to imenu, see the documentation in the
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;; file imenu.el that comes with Emacs.  To add new file types which
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;; etags supports, you need to modify the variable
;; `speedbar-fetch-etags-parse-list'.
;;
;;    If the updates are going too slow for you, modify the variable
;; `speedbar-update-speed' to a longer idle time before updates.
;;
;;    If you navigate directories, you will probably notice that you
;; will navigate to a directory which is eventually replaced after
;; you go back to editing a file (unless you pull up a new file.)
;; The delay time before this happens is in
;; `speedbar-navigating-speed', and defaults to 10 seconds.
;;
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;;    To enable mouse tracking with information in the minibuffer of
;; the attached frame, use the variable `speedbar-track-mouse-flag'.
;;
;;    Tag layout can be modified through `speedbar-tag-hierarchy-method',
;; which controls how tags are layed out.  It is actually a list of
;; functions that filter the data.  The default groups large tag lists
;; into sub-lists.  A long flat list can be used instead if needed.
;; Other filters could be easily added.
;;
;;    Users of XEmacs previous to 20 may want to change the default
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;; timeouts for `speedbar-update-speed' to something longer as XEmacs
;; doesn't have idle timers, the speedbar timer keeps going off
;; arbitrarily while you're typing.  It's quite pesky.
;;
;;    Users of really old emacsen without the needed timers will not
;; have speedbar updating automatically.  Use "r" to refresh the
;; display after changing directories.  Remember, do not interrupt the
;; stealthy updates or your display may not be completely refreshed.
;;
;;    AUC-TEX users: The imenu tags for AUC-TEX mode don't work very
;; well.  Use the imenu keywords from tex-mode.el for better results.
;;
;; This file requires the library package assoc (association lists)
;; and the package custom (for easy configuration of speedbar)
;;     http://www.dina.kvl.dk/~abraham/custom/
;;
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;;; Developing for speedbar
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;;
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;; Adding a speedbar specialized display mode:
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;;
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;; Speedbar can be configured to create a special display for certain
;; modes that do not display tradition file/tag data.  Rmail, Info,
;; and the debugger are examples.  These modes can, however, benefit
;; from a speedbar style display in their own way.
;;
;; If your `major-mode' is `foo-mode', the only requirement is to
;; create a function called `foo-speedbar-buttons' which takes one
;; argument, BUFFER.  BUFFER will be the buffer speedbar wants filled.
;; In `foo-speedbar-buttons' there are several functions that make
;; building a speedbar display easy.  See the documentation for
;; `speedbar-with-writable' (needed because the buffer is usually
;; read-only) `speedbar-make-tag-line', `speedbar-insert-button', and
;; `speedbar-insert-generic-list'.  If you use
;; `speedbar-insert-generic-list', also read the doc for
;; `speedbar-tag-hierarchy-method' in case you wish to override it.
;; The function `speedbar-with-attached-buffer' brings you back to the
;; buffer speedbar is displaying for.
;;
;; For those functions that make buttons, the "function" should be a
;; symbol that is the function to call when clicked on.  The "token"
;; is extra data you can pass along.  The "function" must take three
;; parameters.  They are (TEXT TOKEN INDENT).  TEXT is the text of the
;; button clicked on.  TOKEN is the data passed in when you create the
;; button.  INDENT is an indentation level, or 0.  You can store
;; indentation levels with `speedbar-make-tag-line' which creates a
;; line with an expander (eg.  [+]) and a text button.
;;
;; Some useful functions when writing expand functions, and click
;; functions are `speedbar-change-expand-button-char',
;; `speedbar-delete-subblock', and `speedbar-center-buffer-smartly'.
;; The variable `speedbar-power-click' is set to t in your functions
;; when the user shift-clicks.  This indications anything from
;; refreshing cached data to making a buffer appear in a new frame.
;;
;; If you wish to add to the default speedbar menu for the case of
;; `foo-mode', create a variable `foo-speedbar-menu-items'.  This
;; should be a list compatible with the `easymenu' package.  It will
;; be spliced into the main menu.  (Available with click-mouse-3).  If
;; you wish to have extra key bindings in your special mode, create a
;; variable `foo-speedbar-key-map'.  Instead of using `make-keymap',
;; or `make-sparse-keymap', use the function
;; `speedbar-make-specialized-keymap'.  This lets you inherit all of
;; speedbar's default bindings with low overhead.
;;
;; Adding a speedbar top-level display mode:
;;
;; Unlike the specialized modes, there are no name requirements,
;; however the methods for writing a button display, menu, and keymap
;; are the same.  Once you create these items, you can call the
;; function `speedbar-add-expansion-list'.  It takes one parameter
;; which is a list element of the form (NAME MENU KEYMAP &rest
;; BUTTON-FUNCTIONS).  NAME is a string that will show up in the
;; Displays menu item.  MENU is a symbol containing the menu items to
;; splice in.  KEYMAP is a symbol holding the keymap to use, and
;; BUTTON-FUNCTIONS are the function names to call, in order, to create
;; the display.
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;;; TODO:
;; - More functions to create buttons and options
;; - Timeout directories we haven't visited in a while.
;; - Remeber tags when refreshing the display.  (Refresh tags too?)
;; - More 'special mode support.

(require 'assoc)
(require 'easymenu)

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

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;; From custom web page for compatibility between versions of custom:
(eval-and-compile
  (condition-case ()
      (require 'custom)
    (error nil))
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  (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))
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      nil ;; We've got what we needed
    ;; We have the old custom-library, hack around it!
    (defmacro defgroup (&rest args)
      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))
	   )))
    (defmacro defcustom (var value doc &rest args)
      (` (defvar (, var) (, value) (, doc))))))

;; customization stuff
(defgroup speedbar nil
  "File and tag browser frame."
  :group 'tags
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  :group 'tools
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  :group 'convenience
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  :version "20.3")
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(defgroup speedbar-faces nil
  "Faces used in speedbar."
  :prefix "speedbar-"
  :group 'speedbar
  :group 'faces)

(defgroup speedbar-vc nil
  "Version control display in speedbar."
  :prefix "speedbar-"
  :group 'speedbar)

;;; Code:
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(defvar speedbar-initial-expansion-mode-alist
  '(("buffers" speedbar-buffer-easymenu-definition speedbar-buffers-key-map
     speedbar-buffer-buttons)
    ("quick buffers" speedbar-buffer-easymenu-definition speedbar-buffers-key-map
     speedbar-buffer-buttons-temp)
    ;; Files last, means first in the Displays menu
    ("files" speedbar-easymenu-definition-special speedbar-file-key-map
     speedbar-directory-buttons speedbar-default-directory-list)
    )
  "List of named expansion elements for filling the speedbar frame.
These expansion lists are only valid for regular files.  Special modes
still get to override this list on a mode-by-mode basis.  This list of
lists is of the form (NAME MENU KEYMAP FN1 FN2 ...).  NAME is a string
representing the types of things to be displayed.  MENU is an easymenu
structure used when in this mode.  KEYMAP is a local keymap to install
over the regular speedbar keymap.  FN1 ...  are functions that will be
called in order.  These functions will always get the default
directory to use passed in as the first parameter, and a 0 as the
second parameter.  The 0 indicates the uppermost indentation level.
They must assume that the cursor is at the position where they start
inserting buttons.")

(defcustom speedbar-initial-expansion-list-name "files"
  "A symbol name representing the expansion list to use.
The expansion list `speedbar-initial-expansion-mode-alist' contains
the names and associated functions to use for buttons in speedbar."
  :group 'speedbar
  :type '(radio (const :tag "File Directorys" file)
	       ))

(defvar speedbar-previously-used-expansion-list-name "files"
  "Save the last expansion list method.
This is used for returning to a previous expansion list method when
the user is done with the current expansion list.")
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(defvar speedbar-stealthy-function-list
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  '(("files"
     speedbar-update-current-file speedbar-check-vc speedbar-check-objects)
    )
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  "List of functions to periodically call stealthily.
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This list is of the form:
 '( (\"NAME\" FUNCTION ...)
    ...)
where NAME is the name of the major display mode these functions are
for, and the remaining elements FUNCTION are functions to call in order.
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Each function must return nil if interrupted, or t if completed.
Stealthy functions which have a single operation should always return
t.  Functions which take a long time should maintain a state (where
they are in their speedbar related calculations) and permit
interruption.  See `speedbar-check-vc' as a good example.")

(defcustom speedbar-mode-specific-contents-flag t
  "*Non-nil means speedbar will show special mode contents.
This permits some modes to create customized contents for the speedbar
frame."
  :group 'speedbar
  :type 'boolean)

(defvar speedbar-special-mode-expansion-list nil
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  "Default function list for creating specialized button lists.
This list is set by modes that wish to have special speedbar displays.
The list is of function names.  Each function is called with one
parameter BUFFER, the originating buffer.  The current buffer is the
speedbar buffer.")
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(defvar speedbar-special-mode-key-map nil
  "Default keymap used when identifying a specialized display mode.
This keymap is local to each buffer that wants to define special keybindings
effective when it's display is shown.")
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(defcustom speedbar-visiting-file-hook nil
  "Hooks run when speedbar visits a file in the selected frame."
  :group 'speedbar
  :type 'hook)

(defcustom speedbar-visiting-tag-hook nil
  "Hooks run when speedbar visits a tag in the selected frame."
  :group 'speedbar
  :type 'hook)

(defcustom speedbar-load-hook nil
  "Hooks run when speedbar is loaded."
  :group 'speedbar
  :type 'hook)

(defcustom speedbar-show-unknown-files nil
  "*Non-nil show files we can't expand with a ? in the expand button.
nil means don't show the file in the list."
  :group 'speedbar
  :type 'boolean)

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

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;; When I moved to a repeating timer, I had the horrible missfortune
;; of loosing the ability for adaptive speed choice.  This update
;; speed currently causes long delays when it should have been turned off.
(defcustom speedbar-navigating-speed speedbar-update-speed
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  "*Idle time to wait after navigation commands in speedbar are executed.
Navigation commands included expanding/contracting nodes, and moving
between different directories."
  :group 'speedbar
  :type 'integer)

(defcustom speedbar-frame-parameters '((minibuffer . nil)
				       (width . 20)
				       (scroll-bar-width . 10)
				       (border-width . 0)
				       (menu-bar-lines . 0)
				       (unsplittable . t))
  "*Parameters to use when creating the speedbar frame in Emacs.
Parameters not listed here which will be added automatically are
`height' which will be initialized to the height of the frame speedbar
is attached to."
  :group 'speedbar
  :type '(repeat (sexp :tag "Parameter:")))

;; These values by Hrvoje Niksic <hniksic@srce.hr>
(defcustom speedbar-frame-plist
  '(minibuffer nil width 20 border-width 0
	       internal-border-width 0 unsplittable t
	       default-toolbar-visible-p nil has-modeline-p nil
	       menubar-visible-p nil
	       ;; I don't see the particular value of these three, but...
	       text-pointer-glyph [cursor-font :data "top_left_arrow"]
	       nontext-pointer-glyph [cursor-font :data "top_left_arrow"]
	       selection-pointer-glyph [cursor-font :data "hand2"])
  "*Parameters to use when creating the speedbar frame in XEmacs.
Parameters not listed here which will be added automatically are
`height' which will be initialized to the height of the frame speedbar
is attached to."
  :group 'speedbar
  :type '(repeat (group :inline t
			(symbol :tag "Property")
			(sexp :tag "Value"))))

(defcustom speedbar-use-imenu-flag (stringp (locate-library "imenu"))
  "*Non-nil means use imenu for file parsing.  nil to use etags.
XEmacs prior to 20.4 doesn't support imenu, therefore the default is to
use etags instead.  Etags support is not as robust as imenu support."
  :tag "User Imenu"
  :group 'speedbar
  :type 'boolean)

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(defcustom speedbar-track-mouse-flag t
  "*Non-nil means to display info about the line under the mouse."
  :group 'speedbar
  :type 'boolean)

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(defcustom speedbar-sort-tags nil
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  "*If Non-nil, sort tags in the speedbar display.  *Obsolete*."
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  :group 'speedbar
  :type 'boolean)

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(defcustom speedbar-tag-hierarchy-method
  '(prefix-group trim-words)
  "*List of methods which speedbar will use to organize tags into groups.
Groups are defined as expandable meta-tags.  Imenu supports such
things in some languages, such as separating variables from functions.
Available methods are:
  sort         - Sort tags.  (sometimes unnecessary)
  trim-words   - Trim all tags by a common prefix, broken @ word sections.
  prefix-group - Try to guess groups by prefix.
  simple-group - If imenu already returned some meta groups, stick all
                 tags that are not in a group into a sub-group."
  :group 'speedbar
  :type '(repeat
	  (radio
	   (const :tag "Sort the tags." sort)
	   (const :tag "Trim words to common prefix." trim-words)
	   (const :tag "Create groups from common prefixes." prefix-group)
	   (const :tag "Group loose tags into their own group." simple-group))
	  ))

(defcustom speedbar-tag-split-minimum-length 20
  "*Minimum length before we stop trying to create sub-lists in tags.
This is used by all tag-hierarchy methods that break large lists into
sub-lists."
  :group 'speedbar
  :type 'integer)

(defcustom speedbar-tag-regroup-maximum-length 10
  "*Maximum length of submenus that are regrouped.
If the regrouping option is used, then if two or more short subgroups
are next to each other, then they are combined until this number of
items is reached."
  :group 'speedbar
  :type 'integer)

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(defcustom speedbar-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 'speedbar
  :type 'boolean)

(defcustom speedbar-directory-button-trim-method 'span
  "*Indicates how the directory button will be displayed.
Possible values are:
 'span - span large directories over multiple lines.
 'trim - trim large directories to only show the last few.
 nil   - no trimming."
  :group 'speedbar
  :type '(radio (const :tag "Span large directories over mutiple lines."
		       span)
		(const :tag "Trim large directories to only show the last few."
		       trim)
		(const :tag "No trimming." nil)))

(defcustom speedbar-smart-directory-expand-flag t
  "*Non-nil means speedbar should use smart expansion.
Smart expansion only affects when speedbar wants to display a
directory for a file in the attached frame.  When smart expansion is
enabled, new directories which are children of a displayed directory
are expanded in the current framework.  If nil, then the current
hierarchy would be replaced with the new directory."
  :group 'speedbar
  :type 'boolean)

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(defvar speedbar-hide-button-brackets-flag nil
  "*Non-nil means speedbar will hide the brackets around the + or -.")

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(defcustom speedbar-before-popup-hook nil
  "*Hooks called before popping up the speedbar frame."
  :group 'speedbar
  :type 'hook)

(defcustom speedbar-before-delete-hook nil
  "*Hooks called before deleting the speedbar frame."
  :group 'speedbar
  :type 'hook)

(defcustom speedbar-mode-hook nil
  "*Hooks called after creating a speedbar buffer."
  :group 'speedbar
  :type 'hook)

(defcustom speedbar-timer-hook nil
  "*Hooks called after running the speedbar timer function."
  :group 'speedbar
  :type 'hook)

(defcustom speedbar-verbosity-level 1
  "*Verbosity level of the speedbar.  0 means say nothing.
1 means medium level verbosity.  2 and higher are higher levels of
verbosity."
  :group 'speedbar
  :type 'integer)

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(defvar speedbar-indicator-separator " "
  "String separating file text from indicator characters.")

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(defcustom speedbar-vc-do-check t
  "*Non-nil check all files in speedbar to see if they have been checked out.
Any file checked out is marked with `speedbar-vc-indicator'"
  :group 'speedbar-vc
  :type 'boolean)

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(defvar speedbar-vc-indicator "*"
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  "Text used to mark files which are currently checked out.
Currently only RCS is supported.  Other version control systems can be
added by examining the function `speedbar-this-file-in-vc' and
`speedbar-vc-check-dir-p'")

(defcustom speedbar-vc-path-enable-hook nil
  "*Return non-nil if the current path should be checked for Version Control.
Functions in this hook must accept one parameter which is the path
being checked."
  :group 'speedbar-vc
  :type 'hook)

(defcustom speedbar-vc-in-control-hook nil
  "*Return non-nil if the specified file is under Version Control.
Functions in this hook must accept two parameters.  The PATH of the
current file, and the FILENAME of the file being checked."
  :group 'speedbar-vc
  :type 'hook)

(defvar speedbar-vc-to-do-point nil
  "Local variable maintaining the current version control check position.")

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(defcustom speedbar-obj-do-check t
  "*Non-nil check all files in speedbar to see if they have an object file.
Any file checked out is marked with `speedbar-obj-indicator', and the
marking is based on  `speedbar-obj-alist'"
  :group 'speedbar-vc
  :type 'boolean)

(defvar speedbar-obj-to-do-point nil
  "Local variable maintaining the current version control check position.")

(defvar speedbar-obj-indicator '("#" . "!")
  "Text used to mark files that have a corresponding hidden object file.
The car is for an up-to-date object.  The cdr is for an out of date object.
The expression `speedbar-obj-alist' defines who gets tagged.")

(defvar speedbar-obj-alist
  '(("\\.\\([cpC]\\|cpp\\|cc\\)$" . ".o")
    ("\\.el$" . ".elc")
    ("\\.java$" . ".class")
    ("\\.f\\(or\\|90\\|77\\)?$" . ".o")
    ("\\.tex$" . ".dvi")
    ("\\.texi$" . ".info"))
  "Alist of file extensions, and their corresponding object file type.")

(defvar speedbar-indicator-regex
  (concat (regexp-quote speedbar-indicator-separator)
	  "\\("
	  (regexp-quote speedbar-vc-indicator)
	  "\\|"
	  (regexp-quote (car speedbar-obj-indicator))
	  "\\|"
	  (regexp-quote (cdr speedbar-obj-indicator))
	  "\\)*")
  "Regular expression used when identifying files.
Permits stripping of indicator characters from a line.")

(defcustom speedbar-scanner-reset-hook nil
  "*Hook called whenever generic scanners are reset.
Set this to implement your own scanning / rescan safe functions with
state data."
  :group 'speedbar
  :type 'hook)

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(defvar speedbar-ignored-modes nil
  "*List of major modes which speedbar will not switch directories for.")

(defun speedbar-extension-list-to-regex (extlist)
  "Takes EXTLIST, a list of extensions and transforms it into regexp.
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All the preceding `.' are stripped for an optimized expression starting
with `.' followed by extensions, followed by full-filenames."
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  (let ((regex1 nil) (regex2 nil))
    (while extlist
      (if (= (string-to-char (car extlist)) ?.)
	  (setq regex1 (concat regex1 (if regex1 "\\|" "")
			       (substring (car extlist) 1)))
	(setq regex2 (concat regex2 (if regex2 "\\|" "") (car extlist))))
      (setq extlist (cdr extlist)))
    ;; concat all the sub-exressions together, making sure all types
    ;; of parts exist during concatination.
    (concat "\\("
	    (if regex1 (concat "\\(\\.\\(" regex1 "\\)\\)") "")
	    (if (and regex1 regex2) "\\|" "")
	    (if regex2 (concat "\\(" regex2 "\\)") "")
	    "\\)$")))

(defvar speedbar-ignored-path-regexp nil
  "Regular expression matching paths speedbar will not switch to.
Created from `speedbar-ignored-path-expressions' with the function
`speedbar-extension-list-to-regex' (A misnamed function in this case.)
Use the function `speedbar-add-ignored-path-regexp', or customize the
variable `speedbar-ignored-path-expressions' to modify this variable.")

(defcustom speedbar-ignored-path-expressions
  '("/logs?/\\'")
  "*List of regular expressions matching directories speedbar will ignore.
They should included paths to directories which are notoriously very
large and take a long time to load in.  Use the function
`speedbar-add-ignored-path-regexp' to add new items to this list after
speedbar is loaded.  You may place anything you like in this list
before speedbar has been loaded."
  :group 'speedbar
  :type '(repeat (regexp :tag "Path Regexp"))
  :set (lambda (sym val)
	 (setq speedbar-ignored-path-expressions val
	       speedbar-ignored-path-regexp
	       (speedbar-extension-list-to-regex val))))

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(defcustom speedbar-directory-unshown-regexp "^\\(CVS\\|RCS\\|SCCS\\)\\'"
  "*Regular expression matching directories not to show in speedbar.
They should include commonly existing directories which are not
useful, such as version control."
  :group 'speedbar
  :type 'string)

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(defvar speedbar-file-unshown-regexp
  (let ((nstr "") (noext completion-ignored-extensions))
    (while noext
      (setq nstr (concat nstr (regexp-quote (car noext)) "\\'"
			 (if (cdr noext) "\\|" ""))
	    noext (cdr noext)))
    (concat nstr "\\|#[^#]+#$\\|\\.\\.?\\'"))
  "*Regexp matching files we don't want displayed in a speedbar buffer.
It is generated from the variable `completion-ignored-extensions'")

;; this is dangerous to customize, because the defaults will probably
;; change in the future.
(defcustom speedbar-supported-extension-expressions
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  (append '(".[ch]\\(\\+\\+\\|pp\\|c\\|h\\|xx\\)?" ".tex\\(i\\(nfo\\)?\\)?"
	    ".el" ".emacs" ".l" ".lsp" ".p" ".java" ".f\\(90\\|77\\|or\\)?")
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	  (if speedbar-use-imenu-flag
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	      '(".ada" ".pl" ".tcl" ".m" ".scm" ".pm" ".py"
		;; html is not supported by default, but an imenu tags package
		;; is available.  Also, html files are nice to be able to see.
		".s?html"
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		"Makefile\\(\\.in\\)?")))
  "*List of regular expressions which will match files supported by tagging.
Do not prefix the `.' char with a double \\ to quote it, as the period
will be stripped by a simplified optimizer when compiled into a
singular expression.  This variable will be turned into
`speedbar-file-regexp' for use with speedbar.  You should use the
function `speedbar-add-supported-extension' to add a new extension at
runtime, or use the configuration dialog to set it in your .emacs
file."
  :group 'speedbar
  :type '(repeat (regexp :tag "Extension Regexp"))
  :set (lambda (sym val)
	 (setq speedbar-supported-extension-expressions val
	       speedbar-file-regexp (speedbar-extension-list-to-regex val)))
  )

(defvar speedbar-file-regexp
  (speedbar-extension-list-to-regex speedbar-supported-extension-expressions)
  "Regular expression matching files we know how to expand.
Created from `speedbar-supported-extension-expression' with the
function `speedbar-extension-list-to-regex'")

(defun speedbar-add-supported-extension (extension)
  "Add EXTENSION as a new supported extension for speedbar tagging.
This should start with a `.' if it is not a complete file name, and
the dot should NOT be quoted in with \\.  Other regular expression
matchers are allowed however.  EXTENSION may be a single string or a
list of strings."
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  (interactive "sExtionsion: ")
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  (if (not (listp extension)) (setq extension (list extension)))
  (while extension
    (if (member (car extension) speedbar-supported-extension-expressions)
	nil
      (setq speedbar-supported-extension-expressions
	    (cons (car extension) speedbar-supported-extension-expressions)))
    (setq extension (cdr extension)))
  (setq speedbar-file-regexp (speedbar-extension-list-to-regex
			      speedbar-supported-extension-expressions)))

(defun speedbar-add-ignored-path-regexp (path-expression)
  "Add PATH-EXPRESSION as a new ignored path for speedbar tracking.
This function will modify `speedbar-ignored-path-regexp' and add
PATH-EXPRESSION to `speedbar-ignored-path-expressions'."
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  (interactive "sPath regex: ")
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  (if (not (listp path-expression))
      (setq path-expression (list path-expression)))
  (while path-expression
    (if (member (car path-expression) speedbar-ignored-path-expressions)
	nil
      (setq speedbar-ignored-path-expressions
	    (cons (car path-expression) speedbar-ignored-path-expressions)))
    (setq path-expression (cdr path-expression)))
  (setq speedbar-ignored-path-regexp (speedbar-extension-list-to-regex
				      speedbar-ignored-path-expressions)))

;; If we don't have custom, then we set it here by hand.
(if (not (fboundp 'custom-declare-variable))
    (setq speedbar-file-regexp (speedbar-extension-list-to-regex
				speedbar-supported-extension-expressions)
	  speedbar-ignored-path-regexp (speedbar-extension-list-to-regex
					speedbar-ignored-path-expressions)))

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(defvar speedbar-update-flag (and
			      (or (fboundp 'run-with-idle-timer)
				  (fboundp 'start-itimer)
				  (boundp 'post-command-idle-hook))
			      window-system)
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  "*Non-nil means to automatically update the display.
When this is nil then speedbar will not follow the attached frame's path.
When speedbar is active, use:

\\<speedbar-key-map> `\\[speedbar-toggle-updates]'

to toggle this value.")

(defvar speedbar-syntax-table nil
  "Syntax-table used on the speedbar.")

(if speedbar-syntax-table
    nil
  (setq speedbar-syntax-table (make-syntax-table))
  ;; turn off paren matching around here.
  (modify-syntax-entry ?\' " " speedbar-syntax-table)
  (modify-syntax-entry ?\" " " speedbar-syntax-table)
  (modify-syntax-entry ?( " " speedbar-syntax-table)
  (modify-syntax-entry ?) " " speedbar-syntax-table)
  (modify-syntax-entry ?[ " " speedbar-syntax-table)
  (modify-syntax-entry ?] " " speedbar-syntax-table))

(defvar speedbar-key-map nil
  "Keymap used in speedbar buffer.")

(if speedbar-key-map
    nil
  (setq speedbar-key-map (make-keymap))
  (suppress-keymap speedbar-key-map t)

  ;; control
  (define-key speedbar-key-map "g" 'speedbar-refresh)
  (define-key speedbar-key-map "t" 'speedbar-toggle-updates)
  (define-key speedbar-key-map "q" 'speedbar-close-frame)

  ;; navigation
  (define-key speedbar-key-map "n" 'speedbar-next)
  (define-key speedbar-key-map "p" 'speedbar-prev)
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  (define-key speedbar-key-map "\M-n" 'speedbar-restricted-next)
  (define-key speedbar-key-map "\M-p" 'speedbar-restricted-prev)
  (define-key speedbar-key-map "\C-\M-n" 'speedbar-forward-list)
  (define-key speedbar-key-map "\C-\M-p" 'speedbar-backward-list)
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  (define-key speedbar-key-map " " 'speedbar-scroll-up)
  (define-key speedbar-key-map [delete] 'speedbar-scroll-down)

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  ;; Short cuts I happen to find useful
  (define-key speedbar-key-map "r"
    (lambda () (interactive)
      (speedbar-change-initial-expansion-list
       speedbar-previously-used-expansion-list-name)))
  (define-key speedbar-key-map "b"
    (lambda () (interactive)
      (speedbar-change-initial-expansion-list "quick buffers")))
  (define-key speedbar-key-map "f"
    (lambda () (interactive)
      (speedbar-change-initial-expansion-list "files")))

  ;; Overrides
  (substitute-key-definition 'switch-to-buffer
			     'speedbar-switch-buffer-attached-frame
			     speedbar-key-map global-map)
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  (if speedbar-xemacsp
      (progn
	;; mouse bindings so we can manipulate the items on each line
	(define-key speedbar-key-map 'button2 'speedbar-click)
	(define-key speedbar-key-map '(shift button2) 'speedbar-power-click)
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	;; Info doc fix from Bob Weiner
	(if (featurep 'infodoc)
	    nil
	  (define-key speedbar-key-map 'button3 'speedbar-xemacs-popup-kludge))
	(define-key speedbar-key-map '(meta button3) 'speedbar-mouse-item-info)
	)

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

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

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

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

(defun speedbar-make-specialized-keymap ()
  "Create a keymap for use w/ a speedbar major or minor display mode.
This basically creates a sparse keymap, and makes it's parent be
`speedbar-key-map'."
  (let ((k (make-sparse-keymap)))
    (set-keymap-parent k speedbar-key-map)
    k))

(defvar speedbar-file-key-map nil
  "Keymap used in speedbar buffer while files are displayed.")

(if speedbar-file-key-map
    nil
  (setq speedbar-file-key-map (speedbar-make-specialized-keymap))

  ;; Basic tree features
  (define-key speedbar-file-key-map "e" 'speedbar-edit-line)
  (define-key speedbar-file-key-map "\C-m" 'speedbar-edit-line)
  (define-key speedbar-file-key-map "+" 'speedbar-expand-line)
  (define-key speedbar-file-key-map "-" 'speedbar-contract-line)

  ;; file based commands
  (define-key speedbar-file-key-map "U" 'speedbar-up-directory)
  (define-key speedbar-file-key-map "I" 'speedbar-item-info)
  (define-key speedbar-file-key-map "B" 'speedbar-item-byte-compile)
  (define-key speedbar-file-key-map "L" 'speedbar-item-load)
  (define-key speedbar-file-key-map "C" 'speedbar-item-copy)
  (define-key speedbar-file-key-map "D" 'speedbar-item-delete)
  (define-key speedbar-file-key-map "O" 'speedbar-item-object-delete)
  (define-key speedbar-file-key-map "R" 'speedbar-item-rename)
  )
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(defvar speedbar-easymenu-definition-base
  '("Speedbar"
    ["Update" speedbar-refresh t]
    ["Auto Update" speedbar-toggle-updates
     :style toggle :selected speedbar-update-flag]
    )
  "Base part of the speedbar menu.")

(defvar speedbar-easymenu-definition-special
  '(["Edit Item On Line" speedbar-edit-line t]
    ["Show All Files" speedbar-toggle-show-all-files
     :style toggle :selected speedbar-show-unknown-files]
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    ["Expand File Tags" speedbar-expand-line
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     (save-excursion (beginning-of-line)
		     (looking-at "[0-9]+: *.\\+. "))]
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    ["Contract File Tags" speedbar-contract-line
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     (save-excursion (beginning-of-line)
		     (looking-at "[0-9]+: *.-. "))]
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;    ["Sort Tags" speedbar-toggle-sorting
;     :style toggle :selected speedbar-sort-tags]
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    "----"
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    ["File/Tag Information" speedbar-item-info t]
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    ["Load Lisp File" speedbar-item-load
     (save-excursion
       (beginning-of-line)
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       (looking-at "[0-9]+: *\\[[+-]\\] .+\\(\\.el\\)\\( \\|$\\)"))]
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    ["Byte Compile File" speedbar-item-byte-compile
     (save-excursion
       (beginning-of-line)
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       (looking-at "[0-9]+: *\\[[+-]\\] .+\\(\\.el\\)\\( \\|$\\)"))]
    ["Copy File" speedbar-item-copy
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     (save-excursion (beginning-of-line) (looking-at "[0-9]+: *\\["))]
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    ["Rename File" speedbar-item-rename
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     (save-excursion (beginning-of-line) (looking-at "[0-9]+: *[[<]"))]
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    ["Delete File" speedbar-item-delete
     (save-excursion (beginning-of-line) (looking-at "[0-9]+: *[[<]"))]
    ["Delete Object" speedbar-item-object-delete
     (save-excursion (beginning-of-line)
		     (looking-at "[0-9]+: *\\[[+-]\\] [^ \n]+ \\*?[!#]$"))]
    )
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  "Additional menu items while in file-mode.")
 
(defvar speedbar-easymenu-definition-trailer
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  (list
   (if (and (featurep 'custom) (fboundp 'custom-declare-variable))
       ["Customize..." speedbar-customize t])
   ["Close" speedbar-close-frame t])
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  "Menu items appearing at the end of the speedbar menu.")

(defvar speedbar-desired-buffer nil
  "Non-nil when speedbar is showing buttons specific a special mode.
In this case it is the originating buffer.")
(defvar speedbar-buffer nil
  "The buffer displaying the speedbar.")
(defvar speedbar-frame nil
  "The frame displaying speedbar.")
(defvar speedbar-cached-frame nil
  "The frame that was last created, then removed from the display.")
(defvar speedbar-full-text-cache nil
  "The last open directory is saved in its entirety for ultra-fast switching.")
(defvar speedbar-timer nil
  "The speedbar timer used for updating the buffer.")
(defvar speedbar-attached-frame nil
  "The frame which started speedbar mode.
This is the frame from which all data displayed in the speedbar is
gathered, and in which files and such are displayed.")

(defvar speedbar-last-selected-file nil
  "The last file which was selected in speedbar buffer.")

(defvar speedbar-shown-directories nil
  "Maintain list of directories simultaneously open in the current speedbar.")

(defvar speedbar-directory-contents-alist nil
  "An association list of directories and their contents.
Each sublist was returned by `speedbar-file-lists'.  This list is
maintained to speed up the refresh rate when switching between
directories.")

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


;;; Mode definitions/ user commands
;;

;;;###autoload
(defalias 'speedbar 'speedbar-frame-mode)
;;;###autoload
(defun speedbar-frame-mode (&optional arg)
  "Enable or disable speedbar.  Positive ARG means turn on, negative turn off.
nil means toggle.  Once the speedbar frame is activated, a buffer in
`speedbar-mode' will be displayed.  Currently, only one speedbar is
supported at a time.
`speedbar-before-popup-hook' is called before popping up the speedbar frame.
`speedbar-before-delete-hook' is called before the frame is deleted."
  (interactive "P")
  ;; toggle frame on and off.
  (if (not arg) (if (and (frame-live-p speedbar-frame)
			 (frame-visible-p speedbar-frame))
		    (setq arg -1) (setq arg 1)))
  ;; turn the frame off on neg number
  (if (and (numberp arg) (< arg 0))
      (progn
	(run-hooks 'speedbar-before-delete-hook)
	(if (and speedbar-frame (frame-live-p speedbar-frame))
	    (progn
	      (setq speedbar-cached-frame speedbar-frame)
	      (make-frame-invisible speedbar-frame)))
	(setq speedbar-frame nil)
	(speedbar-set-timer nil)
	;; Used to delete the buffer.  This has the annoying affect of
	;; preventing whatever took its place from ever appearing
	;; as the default after a C-x b was typed
	;;(if (bufferp speedbar-buffer)
	;;    (kill-buffer speedbar-buffer))
	)
    ;; Set this as our currently attached frame
    (setq speedbar-attached-frame (selected-frame))
    (run-hooks 'speedbar-before-popup-hook)
    ;; Get the frame to work in
    (if (frame-live-p speedbar-cached-frame)
	(progn
	  (setq speedbar-frame speedbar-cached-frame)
	  (make-frame-visible speedbar-frame)
	  ;; Get the buffer to play with
	  (speedbar-mode)
	  (select-frame speedbar-frame)
	  (if (not (eq (current-buffer) speedbar-buffer))
	      (switch-to-buffer speedbar-buffer))
	  (set-window-dedicated-p (selected-window) t)
	  (raise-frame speedbar-frame)
	  (speedbar-set-timer speedbar-update-speed)
	  )
      (if (frame-live-p speedbar-frame)
	  (raise-frame speedbar-frame)
	(setq speedbar-frame
	      (if speedbar-xemacsp
		  (make-frame (nconc (list 'height
					   (speedbar-needed-height))
				     speedbar-frame-plist))
		(let* ((mh (cdr (assoc 'menu-bar-lines (frame-parameters))))
		       (params (append speedbar-frame-parameters
				       (list (cons
					      'height
					      (if speedbar-xemacsp
						  (speedbar-needed-height)
						(+ mh (frame-height))))))))
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		  (if (or (< emacs-major-version 20);;a bug is fixed in v20
			  (not (eq window-system 'x)))
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		      (make-frame params)
		    (let ((x-pointer-shape x-pointer-top-left-arrow)
			  (x-sensitive-text-pointer-shape x-pointer-hand2))
		      (make-frame params))))))
	;; reset the selection variable
	(setq speedbar-last-selected-file nil)
	;; Put the buffer into the frame
	(save-window-excursion
	  ;; Get the buffer to play with
	  (speedbar-mode)
	  (select-frame speedbar-frame)
	  (switch-to-buffer speedbar-buffer)
	  (set-window-dedicated-p (selected-window) t))
	(speedbar-set-timer speedbar-update-speed)))))

;;;###autoload
(defun speedbar-get-focus ()
  "Change frame focus to or from the speedbar frame.
If the selected frame is not speedbar, then speedbar frame is
selected.  If the speedbar frame is active, then select the attached frame."
  (interactive)
  (if (eq (selected-frame) speedbar-frame)
      (if (frame-live-p speedbar-attached-frame)
	  (select-frame speedbar-attached-frame))
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    ;; If updates are off, then refresh the frame (they want it now...)
    (if (not speedbar-update-flag)
	(let ((speedbar-update-flag t))
	  (speedbar-timer-fn)))
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    ;; make sure we have a frame
    (if (not (frame-live-p speedbar-frame)) (speedbar-frame-mode 1))
    ;; go there
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    (select-frame speedbar-frame)
    )
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  (other-frame 0))

(defun speedbar-close-frame ()
  "Turn off a currently active speedbar."
  (interactive)
  (speedbar-frame-mode -1)
  (select-frame speedbar-attached-frame)
  (other-frame 0))

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

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(defmacro speedbar-frame-width ()
  "Return the width of the speedbar frame in characters.
nil if it doesn't exist."
  '(frame-width speedbar-frame))

;; XEmacs function only.
(defun speedbar-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 speedbar-mode ()
  "Major mode for managing a display of directories and tags.
\\<speedbar-key-map>
The first line represents the default path of the speedbar frame.
Each directory segment is a button which jumps speedbar's default
directory to that path.  Buttons are activated by clicking `\\[speedbar-click]'.
In some situations using `\\[speedbar-power-click]' is a `power click' which will
rescan cached items, or pop up new frames.

Each line starting with <+> represents a directory.  Click on the <+>
to insert the directory listing into the current tree.  Click on the
<-> to retract that list.  Click on the directory name to go to that
directory as the default.

Each line starting with [+] is a file.  If the variable
`speedbar-show-unknown-files' is t, the lines starting with [?] are
files which don't have imenu support, but are not expressly ignored.
Files are completely ignored if they match `speedbar-file-unshown-regexp'
which is generated from `completion-ignored-extensions'.

Files with a `*' character after their name are files checked out of a
version control system.  (currently only RCS is supported.)  New
version control systems can be added by examining the documentation
for `speedbar-this-file-in-vc' and `speedbar-vc-check-dir-p'

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Files with a `#' or `!' character after them are source files that
have an object file associated with them.  The `!' indicates that the
files is out of date.   You can control what source/object associations
exist through the variable `speedbar-obj-alist'.

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Click on the [+] to display a list of tags from that file.  Click on
the [-] to retract the list.  Click on the file name to edit the file
in the attached frame.

If you open tags, you might find a node starting with {+}, which is a
category of tags.  Click the {+} to expand the category.  Jump-able
tags start with >.  Click the name of the tag to go to that position
in the selected file.

\\{speedbar-key-map}"
  ;; NOT interactive
  (save-excursion
    (setq speedbar-buffer (set-buffer (get-buffer-create " SPEEDBAR")))
    (kill-all-local-variables)
    (setq major-mode 'speedbar-mode)
    (setq mode-name "Speedbar")
    (set-syntax-table speedbar-syntax-table)
    (setq font-lock-keywords nil) ;; no font-locking please
    (setq truncate-lines t)
    (make-local-variable 'frame-title-format)
    (setq frame-title-format "Speedbar")
    ;; Set this up special just for the speedbar buffer
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    ;; Terminal minibuffer stuff does not require this.
    (if (and window-system (null default-minibuffer-frame))
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	(progn
	  (make-local-variable 'default-minibuffer-frame)
	  (setq default-minibuffer-frame speedbar-attached-frame)))
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    ;; 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)))
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    (make-local-variable 'temp-buffer-show-function)
    (setq temp-buffer-show-function 'speedbar-temp-buffer-show-function)
    (if speedbar-xemacsp
	(progn
	  ;; Argh!  mouse-track-click-hook doesn't understand the
	  ;; make-local-hook conventions.
	  (make-local-variable 'mouse-track-click-hook)
	  (add-hook 'mouse-track-click-hook
		    (lambda (event count)
		      (if (/= (event-button event) 1)
			  nil		; Do normal operations.
			(cond ((eq count 1)
			       (speedbar-quick-mouse event))
			      ((or (eq count 2)
				   (eq count 3))
			       (mouse-set-point event)
			       (speedbar-do-function-pointer)
			       (speedbar-quick-mouse event)))
			;; Don't do normal operations.
			t)))))
    (make-local-hook 'kill-buffer-hook)
    (add-hook 'kill-buffer-hook (lambda () (let ((skilling (boundp 'skilling)))
					     (if skilling
						 nil
					       (if (eq (current-buffer)
						       speedbar-buffer)
						   (speedbar-frame-mode -1)))))
	      t t)
    (speedbar-set-mode-line-format)
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    (if speedbar-xemacsp
	(progn
	  (make-local-variable 'mouse-motion-handler)
	  (setq mouse-motion-handler 'speedbar-track-mouse-xemacs))
      (if speedbar-track-mouse-flag
	  (progn
	    (make-local-variable 'track-mouse)
	    (setq track-mouse t)))	;this could be messy.
      (setq auto-show-mode nil))	;no auto-show for Emacs
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    (run-hooks 'speedbar-mode-hook))
  (speedbar-update-contents)
  speedbar-buffer)

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(defun speedbar-show-info-under-mouse (&optional event)
  "Call the info function for the line under the mouse.
Optional EVENT is currently not used."
  (let ((pos (mouse-position)))  ; we ignore event until I use it later.
    (if (equal (car pos) speedbar-frame)
	(save-excursion
	  (save-window-excursion
	    (apply 'set-mouse-position pos)
	    (speedbar-item-info))))))

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(defun speedbar-set-mode-line-format ()
  "Set the format of the mode line based on the current speedbar environment.
This gives visual indications of what is up.  It EXPECTS the speedbar
frame and window to be the currently active frame and window."
  (if (and (frame-live-p speedbar-frame)
	   (or (not speedbar-xemacsp)
	       (specifier-instance has-modeline-p)))
      (save-excursion
	(set-buffer speedbar-buffer)
	(let* ((w (or (speedbar-frame-width) 20))
	       (p1 "<<")
	       (p5 ">>")
	       (p3 (if speedbar-update-flag "SPEEDBAR" "SLOWBAR"))
	       (blank (- w (length p1) (length p3) (length p5)
			 (if line-number-mode 4 0)))
	       (p2 (if (> blank 0)
		       (make-string (/ blank 2) ? )
		     ""))
	       (p4 (if (> blank 0)
		       (make-string (+ (/ blank 2) (% blank 2)) ? )
		     ""))
	       (tf
		(if line-number-mode
		    (list (concat p1 p2 p3) '(line-number-mode " %3l")
			  (concat p4 p5))
		  (list (concat p1 p2 p3 p4 p5)))))
	  (if (not (equal mode-line-format tf))
	      (progn
		(setq mode-line-format tf)
		(force-mode-line-update)))))))

(defun speedbar-temp-buffer-show-function (buffer)
  "Placed in the variable `temp-buffer-show-function' in `speedbar-mode'.
If a user requests help using \\[help-command] <Key> the temp BUFFER will be
redirected into a window on the attached frame."
  (if speedbar-attached-frame (select-frame speedbar-attached-frame))
  (pop-to-buffer buffer nil)
  (other-window -1)
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  ;; Fix for using this hook: Bob Weiner
  (cond ((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 speedbar-reconfigure-keymaps ()
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  "Reconfigure the menu-bar in a speedbar frame.
Different menu items are displayed depending on the current display mode
and the existence of packages."
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  (let ((md (append
	     speedbar-easymenu-definition-base
	     (if speedbar-shown-directories
		 ;; file display mode version
		 (speedbar-initial-menu)
	       (save-excursion
		 (select-frame speedbar-attached-frame)
		 (if (local-variable-p
		      'speedbar-easymenu-definition-special
		      (current-buffer))
		     ;; If bound locally, we can use it
		     speedbar-easymenu-definition-special)))
	     ;; Dynamic menu stuff
	     '("-")
	    (list (cons "Displays"
			(let ((displays nil)
			      (alist speedbar-initial-expansion-mode-alist))
			  (while alist
			    (setq displays
				  (cons
				   (vector
				    (capitalize (car (car alist)))
				    (list
				     'speedbar-change-initial-expansion-list
				     (car (car alist)))
				    t)
				   displays))
			    (setq alist (cdr alist)))
			  displays)))
	    ;; The trailer
	    speedbar-easymenu-definition-trailer))
	(localmap (save-excursion
		    (let ((cf (selected-frame)))
		      (prog2
			  (select-frame speedbar-attached-frame)
			  (if (local-variable-p
			       'speedbar-special-mode-key-map
			       (current-buffer))
			      speedbar-special-mode-key-map)
			(select-frame cf))))))
    (save-excursion
      (set-buffer speedbar-buffer)
      (use-local-map (or localmap
			 (speedbar-initial-keymap)
			 ;; This creates a small keymap we can glom the
			 ;; menu adjustments into.
			 (speedbar-make-specialized-keymap)))
      (if (not speedbar-xemacsp)
	  (easy-menu-define speedbar-menu-map (current-local-map)
			    "Speedbar menu" md)
	(if (and (not (assoc "Speedbar" mode-popup-menu)))
	    (easy-menu-add md (current-local-map)))
	(set-buffer-menubar (list md))))))
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;;; User Input stuff
;;

;; XEmacs: this can be implemented using modeline keymaps, but there
;; is no use, as we have horizontal scrollbar (as the docstring
;; hints.)
(defun speedbar-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 (message "Click on the edge of the modeline to scroll left/right")))
    ;;(message "X: Pixel %d Char Pixels %d On char %d" xp cpw oc)
    ))

(defun speedbar-customize ()
  "Customize speedbar using the Custom package."
  (interactive)
  (let ((sf (selected-frame)))
    (select-frame speedbar-attached-frame)
    (customize-group 'speedbar)
    (select-frame sf))
  (speedbar-maybee-jump-to-attached-frame))

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(defun speedbar-track-mouse (event)
  "For motion EVENT, display info about the current line."
  (interactive "e")
  (if (not speedbar-track-mouse-flag)
      nil
    (save-excursion
      (let ((char (nth 1 (car (cdr event)))))
	(if (not (numberp char))
	    (message nil)
	  (goto-char char)
	  ;; (message "%S" event)
	  (speedbar-item-info)
	  )))))

(defun speedbar-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 speedbar-track-mouse-flag
      (save-excursion
	(save-window-excursion
	  (condition-case ()
	      (progn (mouse-set-point event)
		     ;; Prevent focus-related bugs.
		     (if (eq major-mode 'speedbar-mode)
			 (speedbar-item-info)))
	    (error nil))))))

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;; 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 speedbar-xemacs-popup-kludge (event)
  "Pop up a menu related to the clicked on item.
Must be bound to EVENT."
  (interactive "e")
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  (select-frame speedbar-frame)
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  (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 speedbar-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))))

(defun speedbar-next (arg)
  "Move to the next ARGth line in a speedbar buffer."
  (interactive "p")
  (forward-line (or arg 1))
  (speedbar-item-info)
  (speedbar-position-cursor-on-line))

(defun speedbar-prev (arg)
  "Move to the previous ARGth line in a speedbar buffer."
  (interactive "p")
  (speedbar-next (if arg (- arg) -1)))

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(defun speedbar-restricted-move (arg)
  "Move to the next ARGth line in a speedbar buffer at the same depth.
This means that movement is restricted to a subnode, and that siblings
of intermediate nodes are skipped."
  (if (not (numberp arg)) (signal 'wrong-type-argument (list arg 'numberp)))
  ;; First find the extent for which we are allowed to move.
  (let ((depth (save-excursion (beginning-of-line)
			       (if (looking-at "[0-9]+:")
				   (string-to-int (match-string 0))
				 0)))
	(crement (if (< arg 0) 1 -1)) ; decrement or increment
	(lastmatch (point)))
    (while (/= arg 0)
      (forward-line (- crement))
      (let ((subdepth (save-excursion (beginning-of-line)
			       (if (looking-at "[0-9]+:")
				   (string-to-int (match-string 0))
				 0))))
	(cond ((or (< subdepth depth)
		   (progn (end-of-line) (eobp))
		   (progn (beginning-of-line) (bobp)))
	       ;; We have reached the end of this block.
	       (goto-char lastmatch)
	       (setq arg 0)
	       (error "End of sub-list"))
	      ((= subdepth depth)
	       (setq lastmatch (point)
		     arg (+ arg crement))))))
    (speedbar-position-cursor-on-line)))

(defun speedbar-restricted-next (arg)
  "Move to the next ARGth line in a speedbar buffer at the same depth.
This means that movement is restricted to a subnode, and that siblings
of intermediate nodes are skipped."
  (interactive "p")
  (speedbar-restricted-move (or arg 1))
  (speedbar-item-info))


(defun speedbar-restricted-prev (arg)
  "Move to the previous ARGth line in a speedbar buffer at the same depth.
This means that movement is restricted to a subnode, and that siblings
of intermediate nodes are skipped."
  (interactive "p")
  (speedbar-restricted-move (if arg (- arg) -1))
  (speedbar-item-info))

(defun speedbar-navigate-list (arg)
  "Move across ARG groups of similarly typed items in speedbar.
Stop on the first line of the next type of item, or on the last or first item
if we reach a buffer boundary."
  (interactive "p")
  (beginning-of-line)
  (if (looking-at "[0-9]+: *[[<{][-+?][]>}] ")
      (let ((str (regexp-quote (match-string 0))))
	(while (looking-at str)
	  (speedbar-restricted-move arg)
	  (beginning-of-line))))
  (speedbar-position-cursor-on-line))

(defun speedbar-forward-list ()
  "Move forward over the current list.
A LIST in speedbar is a group of similarly typed items, such as directories,
files, or the directory button."
  (interactive)
  (speedbar-navigate-list 1)
  (speedbar-item-info))

(defun speedbar-backward-list ()
  "Move backward over the current list.
A LIST in speedbar is a group of similarly typed items, such as directories,
files, or the directory button."
  (interactive)
  (speedbar-navigate-list -1)
  (speedbar-item-info))

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(defun speedbar-scroll-up (&optional arg)
  "Page down one screen-full of the speedbar, or ARG lines."
  (interactive "P")
  (scroll-up arg)
  (speedbar-position-cursor-on-line))

(defun speedbar-scroll-down (&optional arg)
  "Page up one screen-full of the speedbar, or ARG lines."
  (interactive "P")
  (scroll-down arg)
  (speedbar-position-cursor-on-line))

(defun speedbar-up-directory ()
  "Keyboard accelerator for moving the default directory up one.
Assumes that the current buffer is the speedbar buffer"
  (interactive)
  (setq default-directory (expand-file-name (concat default-directory "../")))
  (speedbar-update-contents))

;;; Speedbar file activity (aka creeping featurism)
;;
(defun speedbar-refresh ()
  "Refresh the current speedbar display, disposing of any cached data."
  (interactive)
  (let ((dl speedbar-shown-directories))
    (while dl
      (adelete 'speedbar-directory-contents-alist (car dl))
      (setq dl (cdr dl))))
  (if (<= 1 speedbar-verbosity-level) (message "Refreshing speedbar..."))
  (speedbar-update-contents)
  (speedbar-stealthy-updates)
  ;; Reset the timer in case it got really hosed for some reason...
  (speedbar-set-timer speedbar-update-speed)
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  (if (<= 1 speedbar-verbosity-level)
      (progn
	(message "Refreshing speedbar...done")
	(sit-for 0)
	(message nil))))
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(defun speedbar-item-load ()
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  "Load the item under the cursor or mouse if it is a Lisp file."
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  (interactive)
  (let ((f (speedbar-line-file)))
    (if (and (file-exists-p f) (string-match "\\.el\\'" f))
	(if (and (file-exists-p (concat f "c"))
		 (y-or-n-p (format "Load %sc? " f)))
	    ;; If the compiled version exists, load that instead...
	    (load-file (concat f "c"))
	  (load-file f))
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      (error "Not a loadable file"))))
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(defun speedbar-item-byte-compile ()
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  "Byte compile the item under the cursor or mouse if it is a Lisp file."
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  (interactive)
  (let ((f (speedbar-line-file))
	(sf (selected-frame)))
    (if (and (file-exists-p f) (string-match "\\.el\\'" f))
	(progn
	  (select-frame speedbar-attached-frame)
	  (byte-compile-file f nil)
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	  (select-frame sf)
	  (speedbar-reset-scanners)))
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    ))

(defun speedbar-mouse-item-info (event)
  "Provide information about what the user clicked on.
This should be bound to a mouse EVENT."
  (interactive "e")
  (mouse-set-point event)
  (speedbar-item-info))

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(defun speedbar-generic-item-info ()
  "Attempt to derive, and then display information about thils line item.
File style information is displayed with `speedbar-item-info'."
  (save-excursion
    (beginning-of-line)
    ;; Skip invisible number info.
    (if (looking-at "\\([0-9]+\\):") (goto-char (match-end 0)))
    ;; Skip items in "folder" type text characters.
    (if (looking-at "\\s-*[[<({].[]>)}] ") (goto-char (match-end 0)))
    ;; Get the text
    (message "Text: %s" (buffer-substring-no-properties
			 (point) (progn (end-of-line) (point))))))

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(defun speedbar-item-info ()
  "Display info in the mini-buffer about the button the mouse is over."
  (interactive)
  (if (not speedbar-shown-directories)
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      (speedbar-generic-item-info)
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    (let* ((item (speedbar-line-file))
	   (attr (if item (file-attributes item) nil)))
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      (if (and item attr) (message "%s %-6d %s" (nth 8 attr) (nth 7 attr) item)
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	(save-excursion
	  (beginning-of-line)
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	  (if (not (looking-at "\\([0-9]+\\):"))
	      (speedbar-generic-item-info)
	    (setq item (speedbar-line-path (string-to-int (match-string 1))))
	    (if (re-search-forward "> \\([^ ]+\\)$"
				   (save-excursion(end-of-line)(point)) t)
		(progn
		  (setq attr (get-text-property (match-beginning 1)
						'speedbar-token))
		  (message "Tag: %s  in %s @ %s"
			   (match-string 1) item
			   (if attr
			       (if (markerp attr) (marker-position attr) attr)
			     0)))
	      (if (re-search-forward "{[+-]} \\([^\n]+\\)$"
				     (save-excursion(end-of-line)(point)) t)
		  (message "Group of tags \"%s\"" (match-string 1))
		(speedbar-generic-item-info)))))))))
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(defun speedbar-item-copy ()
  "Copy the item under the cursor.
Files can be copied to new names or places."
  (interactive)
  (let ((f (speedbar-line-file)))
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    (if (not f)	(error "Not a file"))
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    (if (file-directory-p f)
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	(error "Cannot copy directory")
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      (let* ((rt (read-file-name (format "Copy %s to: "
					 (file-name-nondirectory f))
				 (file-name-directory f)))
	     (refresh (member (expand-file-name (file-name-directory rt))
			      speedbar-shown-directories)))
	;; Create the right file name part
	(if (file-directory-p rt)
	    (setq rt
		  (concat (expand-file-name rt)
			  (if (string-match "/$" rt) "" "/")
			  (file-name-nondirectory f))))
	(if (or (not (file-exists-p rt))
		(y-or-n-p (format "Overwrite %s with %s? " rt f)))
	    (progn
	      (copy-file f rt t t)
	      ;; refresh display if the new place is currently displayed.
	      (if refresh
		  (progn
		    (speedbar-refresh)
		    (if (not (speedbar-goto-this-file rt))
			(speedbar-goto-this-file f))))
	      ))))))

(defun speedbar-item-rename ()
  "Rename the item under the cursor or mouse.
Files can be renamed to new names or moved to new directories."
  (interactive)
  (let ((f (speedbar-line-file)))
    (if f
	(let* ((rt (read-file-name (format "Rename %s to: "
					   (file-name-nondirectory f))
				   (file-name-directory f)))
	       (refresh (member (expand-file-name (file-name-directory rt))
				speedbar-shown-directories)))
	  ;; Create the right file name part
	  (if (file-directory-p rt)
	      (setq rt
		    (concat (expand-file-name rt)
			    (if (string-match "/\\'" rt) "" "/")
			    (file-name-nondirectory f))))
	  (if (or (not (file-exists-p rt))
		  (y-or-n-p (format "Overwrite %s with %s? " rt f)))
	      (progn
		(rename-file f rt t)
		;; refresh display if the new place is currently displayed.
		(if refresh
		    (progn
		      (speedbar-refresh)
		      (speedbar-goto-this-file rt)
		      )))))
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      (error "Not a file"))))
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(defun speedbar-item-delete ()
  "Delete the item under the cursor.  Files are removed from disk."
  (interactive)
  (let ((f (speedbar-line-file)))
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    (if (not f) (error "Not a file"))
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    (if (y-or-n-p (format "Delete %s? " f))
	(progn
	  (if (file-directory-p f)
	      (delete-directory f)
	    (delete-file f))
	  (message "Okie dokie..")
	  (let ((p (point)))
	    (speedbar-refresh)
	    (goto-char p))
	  ))
    ))

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(defun speedbar-item-object-delete ()
  "Delete the object associated from the item under the cursor.
The file is removed from disk.  The object is determined from the
variable `speedbar-obj-alist'."
  (interactive)
  (let* ((f (speedbar-line-file))
	 (obj nil)
	 (oa speedbar-obj-alist))
    (if (not f) (error "Not a file"))
    (while (and oa (not (string-match (car (car oa)) f)))
      (setq oa (cdr oa)))
    (setq obj (concat (file-name-sans-extension f) (cdr (car oa))))
    (if (and oa (file-exists-p obj)
	     (y-or-n-p (format "Delete %s? " obj)))
	(progn
	  (delete-file obj)
	  (speedbar-reset-scanners)))))

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