mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-20 10:23:57 +00:00
a464a6c73a
* woman.el, winner.el, vc/vc-rcs.el, vc/vc-hooks.el, vc/vc-hg.el: * vc/vc-git.el, vc/vc-dir.el, vc/vc-bzr.el, vc/vc-annotate.el: * textmodes/tex-mode.el, textmodes/sgml-mode.el, tar-mode.el: * strokes.el, ses.el, server.el, progmodes/js.el, progmodes/gdb-mi.el: * progmodes/flymake.el, progmodes/ebrowse.el, progmodes/compile.el: * play/tetris.el, play/snake.el, play/pong.el, play/landmark.el: * play/hanoi.el, play/decipher.el, play/5x5.el, nxml/nxml-mode.el: * net/secrets.el, net/quickurl.el, midnight.el, mail/footnote.el: * image-dired.el, ibuffer.el, ibuf-macs.el, ibuf-ext.el, hexl.el: * eshell/eshell.el, eshell/esh-io.el, eshell/esh-ext.el: * eshell/esh-cmd.el, eshell/em-ls.el, eshell/em-hist.el: * eshell/em-cmpl.el, eshell/em-banner.el: * url/url.el, url/url-queue.el, url/url-parse.el, url/url-http.el: * url/url-future.el, url/url-dav.el, url/url-cookie.el: * calendar/parse-time.el, test/eshell.el: Use cl-lib. * wid-browse.el, wdired.el, vc/vc.el, vc/vc-mtn.el, vc/vc-cvs.el: * vc/vc-arch.el, tree-widget.el, textmodes/texinfo.el: * textmodes/refill.el, textmodes/css-mode.el, term/tvi970.el: * term/ns-win.el, term.el, shell.el, ps-samp.el: * progmodes/perl-mode.el, progmodes/pascal.el, progmodes/gud.el: * progmodes/glasses.el, progmodes/etags.el, progmodes/cwarn.el: * play/gamegrid.el, play/bubbles.el, novice.el, notifications.el: * net/zeroconf.el, net/xesam.el, net/snmp-mode.el, net/mairix.el: * net/ldap.el, net/eudc.el, net/browse-url.el, man.el: * mail/mailheader.el, mail/feedmail.el: * url/url-util.el, url/url-privacy.el, url/url-nfs.el, url/url-misc.el: * url/url-methods.el, url/url-gw.el, url/url-file.el, url/url-expand.el: Dont use CL. * ibuf-ext.el (ibuffer-mark-old-buffers): Use float-time. * eshell/esh-opt.el (eshell-eval-using-options): Quote code with `lambda' rather than with `quote'. (eshell-do-opt): Adjust accordingly. (eshell-process-option): Simplify. * eshell/esh-var.el: * eshell/em-script.el: Require `esh-opt' for eshell-eval-using-options. * emacs-pcase.el (pcase--dontcare-upats, pcase--let*) (pcase--expand, pcase--u1): Rename pcase's internal `dontcare' pattern to `pcase--dontcare'. * emacs-cl.el (labels): Mark obsolete. (cl--letf, letf): Move to cl-lib. (cl--letf*, letf*): Remove. * emacs-cl-lib.el (cl-nth-value): Use defalias. * emacs-cl-macs.el (cl-dolist, cl-dotimes): Add indent rule. (cl-progv): Rewrite. (cl--letf, cl-letf): Move from cl.el. (cl-letf*): New macro. * emacs-cl-extra.el (cl--progv-before, cl--progv-after): Remove.
823 lines
31 KiB
EmacsLisp
823 lines
31 KiB
EmacsLisp
;;; tree-widget.el --- Tree widget
|
||
|
||
;; Copyright (C) 2004-2012 Free Software Foundation, Inc.
|
||
|
||
;; Author: David Ponce <david@dponce.com>
|
||
;; Maintainer: David Ponce <david@dponce.com>
|
||
;; Created: 16 Feb 2001
|
||
;; Keywords: extensions
|
||
|
||
;; 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
|
||
|
||
;;; Commentary:
|
||
;;
|
||
;; This library provide a tree widget useful to display data
|
||
;; structures organized in a hierarchical order.
|
||
;;
|
||
;; The following properties are specific to the tree widget:
|
||
;;
|
||
;; :open
|
||
;; Set to non-nil to expand the tree. By default the tree is
|
||
;; collapsed.
|
||
;;
|
||
;; :node
|
||
;; Specify the widget used to represent the value of a tree node.
|
||
;; By default this is an `item' widget which displays the
|
||
;; tree-widget :tag property value if defined, or a string
|
||
;; representation of the tree-widget value.
|
||
;;
|
||
;; :keep
|
||
;; Specify a list of properties to keep when the tree is collapsed
|
||
;; so they can be recovered when the tree is expanded. This
|
||
;; property can be used in child widgets too.
|
||
;;
|
||
;; :expander (obsoletes :dynargs)
|
||
;; Specify a function to be called to dynamically provide the
|
||
;; tree's children in response to an expand request. This function
|
||
;; will be passed the tree widget and must return a list of child
|
||
;; widgets. Child widgets returned by the :expander function are
|
||
;; stored in the :args property of the tree widget.
|
||
;;
|
||
;; :expander-p
|
||
;; Specify a predicate which must return non-nil to indicate that
|
||
;; the :expander function above has to be called. By default, to
|
||
;; speed up successive expand requests, the :expander-p predicate
|
||
;; return non-nil when the :args value is nil. So, by default, to
|
||
;; refresh child values, it is necessary to set the :args property
|
||
;; to nil, then redraw the tree.
|
||
;;
|
||
;; :open-icon (default `tree-widget-open-icon')
|
||
;; :close-icon (default `tree-widget-close-icon')
|
||
;; :empty-icon (default `tree-widget-empty-icon')
|
||
;; :leaf-icon (default `tree-widget-leaf-icon')
|
||
;; Those properties define the icon widgets associated to tree
|
||
;; nodes. Icon widgets must derive from the `tree-widget-icon'
|
||
;; widget. The :tag and :glyph-name property values are
|
||
;; respectively used when drawing the text and graphic
|
||
;; representation of the tree. The :tag value must be a string
|
||
;; that represent a node icon, like "[+]" for example. The
|
||
;; :glyph-name value must the name of an image found in the current
|
||
;; theme, like "close" for example (see also the variable
|
||
;; `tree-widget-theme').
|
||
;;
|
||
;; :guide (default `tree-widget-guide')
|
||
;; :end-guide (default `tree-widget-end-guide')
|
||
;; :no-guide (default `tree-widget-no-guide')
|
||
;; :handle (default `tree-widget-handle')
|
||
;; :no-handle (default `tree-widget-no-handle')
|
||
;; Those properties define `item'-like widgets used to draw the
|
||
;; tree guide lines. The :tag property value is used when drawing
|
||
;; the text representation of the tree. The graphic look and feel
|
||
;; is given by the images named "guide", "no-guide", "end-guide",
|
||
;; "handle", and "no-handle" found in the current theme (see also
|
||
;; the variable `tree-widget-theme').
|
||
;;
|
||
;; These are the default :tag values for icons, and guide lines:
|
||
;;
|
||
;; open-icon "[-]"
|
||
;; close-icon "[+]"
|
||
;; empty-icon "[X]"
|
||
;; leaf-icon ""
|
||
;; guide " |"
|
||
;; no-guide " "
|
||
;; end-guide " `"
|
||
;; handle "-"
|
||
;; no-handle " "
|
||
;;
|
||
;; The text representation of a tree looks like this:
|
||
;;
|
||
;; [-] 1 (open-icon :node)
|
||
;; |-[+] 1.0 (guide+handle+close-icon :node)
|
||
;; |-[X] 1.1 (guide+handle+empty-icon :node)
|
||
;; `-[-] 1.2 (end-guide+handle+open-icon :node)
|
||
;; |- 1.2.1 (no-guide+no-handle+guide+handle+leaf-icon leaf)
|
||
;; `- 1.2.2 (no-guide+no-handle+end-guide+handle+leaf-icon leaf)
|
||
;;
|
||
;; By default, images will be used instead of strings to draw a
|
||
;; nice-looking tree. See the `tree-widget-image-enable',
|
||
;; `tree-widget-themes-directory', and `tree-widget-theme' options for
|
||
;; more details.
|
||
|
||
;;; History:
|
||
;;
|
||
|
||
;;; Code:
|
||
(require 'wid-edit)
|
||
|
||
;;; Customization
|
||
;;
|
||
(defgroup tree-widget nil
|
||
"Customization support for the Tree Widget library."
|
||
:version "22.1"
|
||
:group 'widgets)
|
||
|
||
(defcustom tree-widget-image-enable (if (fboundp 'display-images-p)
|
||
(display-images-p))
|
||
"Non-nil means that tree-widget will try to use images."
|
||
:type 'boolean
|
||
:group 'tree-widget)
|
||
|
||
(defvar tree-widget-themes-load-path
|
||
'(load-path
|
||
(let ((dir (if (fboundp 'locate-data-directory)
|
||
(locate-data-directory "tree-widget") ;; XEmacs
|
||
data-directory)))
|
||
(and dir (list dir (expand-file-name "images" dir))))
|
||
)
|
||
"List of locations in which to search for the themes sub-directory.
|
||
Each element is an expression that will be recursively evaluated until
|
||
it returns a single directory or a list of directories.
|
||
The default is to search in the `load-path' first, then in the
|
||
\"images\" sub directory in the data directory, then in the data
|
||
directory.
|
||
The data directory is the value of the variable `data-directory' on
|
||
Emacs, and what `(locate-data-directory \"tree-widget\")' returns on
|
||
XEmacs.")
|
||
|
||
(defcustom tree-widget-themes-directory "tree-widget"
|
||
"Name of the directory in which to look for an image theme.
|
||
When nil use the directory where the tree-widget library is located.
|
||
When it is a relative name, search in all occurrences of that sub
|
||
directory in the path specified by `tree-widget-themes-load-path'.
|
||
The default is to use the \"tree-widget\" relative name."
|
||
:type '(choice (const :tag "Default" "tree-widget")
|
||
(const :tag "Where is this library" nil)
|
||
(directory :format "%{%t%}:\n%v"))
|
||
:group 'tree-widget)
|
||
|
||
(defcustom tree-widget-theme nil
|
||
"Name of the theme in which to look for images.
|
||
This is a sub directory of the themes directory specified by the
|
||
`tree-widget-themes-directory' option.
|
||
The default theme is \"default\". When an image is not found in a
|
||
theme, it is searched in its parent theme.
|
||
|
||
A complete theme must at least contain images with these file names
|
||
with a supported extension (see also `tree-widget-image-formats'):
|
||
|
||
\"guide\"
|
||
A vertical guide line.
|
||
\"no-guide\"
|
||
An invisible vertical guide line.
|
||
\"end-guide\"
|
||
End of a vertical guide line.
|
||
\"handle\"
|
||
Horizontal guide line that joins the vertical guide line to an icon.
|
||
\"no-handle\"
|
||
An invisible handle.
|
||
|
||
Plus images whose name is given by the :glyph-name property of the
|
||
icon widgets used to draw the tree. By default these images are used:
|
||
|
||
\"open\"
|
||
Icon associated to an expanded tree.
|
||
\"close\"
|
||
Icon associated to a collapsed tree.
|
||
\"empty\"
|
||
Icon associated to an expanded tree with no child.
|
||
\"leaf\"
|
||
Icon associated to a leaf node."
|
||
:type '(choice (const :tag "Default" nil)
|
||
(string :tag "Name"))
|
||
:group 'tree-widget)
|
||
|
||
(defcustom tree-widget-image-properties-emacs
|
||
'(:ascent center :mask (heuristic t))
|
||
"Default properties of Emacs images."
|
||
:type 'plist
|
||
:group 'tree-widget)
|
||
|
||
(defcustom tree-widget-image-properties-xemacs
|
||
nil
|
||
"Default properties of XEmacs images."
|
||
:type 'plist
|
||
:group 'tree-widget)
|
||
|
||
(defcustom tree-widget-space-width 0.5
|
||
"Amount of space between an icon image and a node widget.
|
||
Must be a valid space :width display property."
|
||
:group 'tree-widget
|
||
:type 'sexp)
|
||
|
||
;;; Image support
|
||
;;
|
||
(eval-and-compile ;; Emacs/XEmacs compatibility stuff
|
||
(cond
|
||
;; XEmacs
|
||
((featurep 'xemacs)
|
||
(defsubst tree-widget-use-image-p ()
|
||
"Return non-nil if image support is currently enabled."
|
||
(and tree-widget-image-enable
|
||
widget-glyph-enable
|
||
(console-on-window-system-p)))
|
||
(defsubst tree-widget-create-image (type file &optional props)
|
||
"Create an image of type TYPE from FILE, and return it.
|
||
Give the image the specified properties PROPS."
|
||
(apply 'make-glyph `([,type :file ,file ,@props])))
|
||
(defsubst tree-widget-image-formats ()
|
||
"Return the alist of image formats/file name extensions.
|
||
See also the option `widget-image-file-name-suffixes'."
|
||
(delq nil
|
||
(mapcar
|
||
#'(lambda (fmt)
|
||
(and (valid-image-instantiator-format-p (car fmt)) fmt))
|
||
widget-image-file-name-suffixes)))
|
||
)
|
||
;; Emacs
|
||
(t
|
||
(defsubst tree-widget-use-image-p ()
|
||
"Return non-nil if image support is currently enabled."
|
||
(and tree-widget-image-enable
|
||
widget-image-enable
|
||
(display-images-p)))
|
||
(defsubst tree-widget-create-image (type file &optional props)
|
||
"Create an image of type TYPE from FILE, and return it.
|
||
Give the image the specified properties PROPS."
|
||
(apply 'create-image `(,file ,type nil ,@props)))
|
||
(defsubst tree-widget-image-formats ()
|
||
"Return the alist of image formats/file name extensions.
|
||
See also the option `widget-image-conversion'."
|
||
(delq nil
|
||
(mapcar
|
||
#'(lambda (fmt)
|
||
(and (image-type-available-p (car fmt)) fmt))
|
||
widget-image-conversion)))
|
||
))
|
||
)
|
||
|
||
;; Buffer local cache of theme data.
|
||
(defvar tree-widget--theme nil)
|
||
|
||
(defsubst tree-widget-theme-name ()
|
||
"Return the current theme name, or nil if no theme is active."
|
||
(and tree-widget--theme (car (aref tree-widget--theme 0))))
|
||
|
||
(defsubst tree-widget-set-parent-theme (name)
|
||
"Set to NAME the parent theme of the current theme.
|
||
The default parent theme is the \"default\" theme."
|
||
(unless (member name (aref tree-widget--theme 0))
|
||
(aset tree-widget--theme 0
|
||
(append (aref tree-widget--theme 0) (list name)))
|
||
;; Load the theme setup from the first directory where the theme
|
||
;; is found.
|
||
(catch 'found
|
||
(dolist (dir (tree-widget-themes-path))
|
||
(setq dir (expand-file-name name dir))
|
||
(when (file-accessible-directory-p dir)
|
||
(throw 'found
|
||
(load (expand-file-name
|
||
"tree-widget-theme-setup" dir) t)))))))
|
||
|
||
(defun tree-widget-set-theme (&optional name)
|
||
"In the current buffer, set the theme to use for images.
|
||
The current buffer must be where the tree widget is drawn.
|
||
Optional argument NAME is the name of the theme to use. It defaults
|
||
to the value of the variable `tree-widget-theme'.
|
||
Does nothing if NAME is already the current theme.
|
||
|
||
If there is a \"tree-widget-theme-setup\" library in the theme
|
||
directory, load it to setup a parent theme or the images properties.
|
||
Typically it should contain something like this:
|
||
|
||
(tree-widget-set-parent-theme \"my-parent-theme\")
|
||
(tree-widget-set-image-properties
|
||
(if (featurep 'xemacs)
|
||
'(:ascent center)
|
||
'(:ascent center :mask (heuristic t))
|
||
))"
|
||
(or name (setq name (or tree-widget-theme "default")))
|
||
(unless (string-equal name (tree-widget-theme-name))
|
||
(set (make-local-variable 'tree-widget--theme)
|
||
(make-vector 4 nil))
|
||
(tree-widget-set-parent-theme name)
|
||
(tree-widget-set-parent-theme "default")))
|
||
|
||
(defun tree-widget--locate-sub-directory (name path &optional found)
|
||
"Locate all occurrences of the sub-directory NAME in PATH.
|
||
Return a list of absolute directory names in reverse order, or nil if
|
||
not found."
|
||
(condition-case err
|
||
(dolist (elt path)
|
||
(setq elt (eval elt))
|
||
(cond
|
||
((stringp elt)
|
||
(and (file-accessible-directory-p
|
||
(setq elt (expand-file-name name elt)))
|
||
(push elt found)))
|
||
(elt
|
||
(setq found (tree-widget--locate-sub-directory
|
||
name (if (atom elt) (list elt) elt) found)))))
|
||
(error
|
||
(message "In tree-widget--locate-sub-directory: %s"
|
||
(error-message-string err))))
|
||
found)
|
||
|
||
(defun tree-widget-themes-path ()
|
||
"Return the path where to search for a theme.
|
||
It is specified in variable `tree-widget-themes-directory'.
|
||
Return a list of absolute directory names, or nil when no directory
|
||
has been found accessible."
|
||
(let ((path (aref tree-widget--theme 1)))
|
||
(cond
|
||
;; No directory was found.
|
||
((eq path 'void) nil)
|
||
;; The list of directories is available in the cache.
|
||
(path)
|
||
;; Use the directory where this library is located.
|
||
((null tree-widget-themes-directory)
|
||
(when (setq path (locate-library "tree-widget"))
|
||
(setq path (file-name-directory path))
|
||
(setq path (and (file-accessible-directory-p path)
|
||
(list path)))
|
||
;; Store the result in the cache for later use.
|
||
(aset tree-widget--theme 1 (or path 'void))
|
||
path))
|
||
;; Check accessibility of absolute directory name.
|
||
((file-name-absolute-p tree-widget-themes-directory)
|
||
(setq path (expand-file-name tree-widget-themes-directory))
|
||
(setq path (and (file-accessible-directory-p path)
|
||
(list path)))
|
||
;; Store the result in the cache for later use.
|
||
(aset tree-widget--theme 1 (or path 'void))
|
||
path)
|
||
;; Locate a sub-directory in `tree-widget-themes-load-path'.
|
||
(t
|
||
(setq path (nreverse (tree-widget--locate-sub-directory
|
||
tree-widget-themes-directory
|
||
tree-widget-themes-load-path)))
|
||
;; Store the result in the cache for later use.
|
||
(aset tree-widget--theme 1 (or path 'void))
|
||
path))))
|
||
|
||
(defconst tree-widget--cursors
|
||
;; Pointer shapes when the mouse pointer is over inactive
|
||
;; tree-widget images. This feature works since Emacs 22, and
|
||
;; ignored on older versions, and XEmacs.
|
||
'(
|
||
("guide" . arrow)
|
||
("no-guide" . arrow)
|
||
("end-guide" . arrow)
|
||
("handle" . arrow)
|
||
("no-handle" . arrow)
|
||
))
|
||
|
||
(defsubst tree-widget-set-image-properties (props)
|
||
"In current theme, set images properties to PROPS.
|
||
Does nothing if images properties have already been set for that
|
||
theme."
|
||
(or (aref tree-widget--theme 2)
|
||
(aset tree-widget--theme 2 props)))
|
||
|
||
(defsubst tree-widget-image-properties (name)
|
||
"Return the properties of image NAME in current theme.
|
||
Default global properties are provided for respectively Emacs and
|
||
XEmacs in the variables `tree-widget-image-properties-emacs', and
|
||
`tree-widget-image-properties-xemacs'."
|
||
;; Add the pointer shape
|
||
(cons :pointer
|
||
(cons (or (cdr (assoc name tree-widget--cursors)) 'hand)
|
||
(tree-widget-set-image-properties
|
||
(if (featurep 'xemacs)
|
||
tree-widget-image-properties-xemacs
|
||
tree-widget-image-properties-emacs)))))
|
||
|
||
(defun tree-widget-lookup-image (name)
|
||
"Look up in current theme for an image with NAME.
|
||
Search first in current theme, then in parent themes (see also the
|
||
function `tree-widget-set-parent-theme').
|
||
Return the first image found having a supported format, or nil if not
|
||
found."
|
||
(let (file)
|
||
(catch 'found
|
||
(dolist (default-directory (tree-widget-themes-path))
|
||
(dolist (dir (aref tree-widget--theme 0))
|
||
(dolist (fmt (tree-widget-image-formats))
|
||
(dolist (ext (cdr fmt))
|
||
(setq file (expand-file-name (concat name ext) dir))
|
||
(and (file-readable-p file)
|
||
(file-regular-p file)
|
||
(throw 'found
|
||
(tree-widget-create-image
|
||
(car fmt) file
|
||
(tree-widget-image-properties name))))))))
|
||
nil)))
|
||
|
||
(defun tree-widget-find-image (name)
|
||
"Find the image with NAME in current theme.
|
||
NAME is an image file name sans extension.
|
||
Return the image found, or nil if not found."
|
||
(when (tree-widget-use-image-p)
|
||
;; Ensure there is an active theme.
|
||
(tree-widget-set-theme (tree-widget-theme-name))
|
||
(let ((image (assoc name (aref tree-widget--theme 3))))
|
||
;; The image NAME is found in the cache.
|
||
(if image
|
||
(cdr image)
|
||
;; Search the image in current, and default themes.
|
||
(prog1
|
||
(setq image (tree-widget-lookup-image name))
|
||
;; Store image reference in the cache for later use.
|
||
(push (cons name image) (aref tree-widget--theme 3))))
|
||
)))
|
||
|
||
;;; Widgets
|
||
;;
|
||
(defun tree-widget-button-click (event)
|
||
"Move to the position clicked on, and if it is a button, invoke it.
|
||
EVENT is the mouse event received."
|
||
(interactive "e")
|
||
(mouse-set-point event)
|
||
(let ((pos (widget-event-point event)))
|
||
(if (get-char-property pos 'button)
|
||
(widget-button-click event))))
|
||
|
||
(defvar tree-widget-button-keymap
|
||
(let ((km (make-sparse-keymap)))
|
||
(if (boundp 'widget-button-keymap)
|
||
;; XEmacs
|
||
(progn
|
||
(set-keymap-parent km widget-button-keymap)
|
||
(define-key km [button1] 'tree-widget-button-click))
|
||
;; Emacs
|
||
(set-keymap-parent km widget-keymap)
|
||
(define-key km [down-mouse-1] 'tree-widget-button-click))
|
||
km)
|
||
"Keymap used inside node buttons.
|
||
Handle mouse button 1 click on buttons.")
|
||
|
||
(define-widget 'tree-widget-icon 'push-button
|
||
"Basic widget other tree-widget icons are derived from."
|
||
:format "%[%t%]"
|
||
:button-keymap tree-widget-button-keymap ; XEmacs
|
||
:keymap tree-widget-button-keymap ; Emacs
|
||
:create 'tree-widget-icon-create
|
||
:action 'tree-widget-icon-action
|
||
:help-echo 'tree-widget-icon-help-echo
|
||
)
|
||
|
||
(define-widget 'tree-widget-open-icon 'tree-widget-icon
|
||
"Icon for an expanded tree-widget node."
|
||
:tag "[-]"
|
||
:glyph-name "open"
|
||
)
|
||
|
||
(define-widget 'tree-widget-empty-icon 'tree-widget-icon
|
||
"Icon for an expanded tree-widget node with no child."
|
||
:tag "[X]"
|
||
:glyph-name "empty"
|
||
)
|
||
|
||
(define-widget 'tree-widget-close-icon 'tree-widget-icon
|
||
"Icon for a collapsed tree-widget node."
|
||
:tag "[+]"
|
||
:glyph-name "close"
|
||
)
|
||
|
||
(define-widget 'tree-widget-leaf-icon 'tree-widget-icon
|
||
"Icon for a tree-widget leaf node."
|
||
:tag ""
|
||
:glyph-name "leaf"
|
||
:button-face 'default
|
||
)
|
||
|
||
(define-widget 'tree-widget-guide 'item
|
||
"Vertical guide line."
|
||
:tag " |"
|
||
;;:tag-glyph (tree-widget-find-image "guide")
|
||
:format "%t"
|
||
)
|
||
|
||
(define-widget 'tree-widget-end-guide 'item
|
||
"End of a vertical guide line."
|
||
:tag " `"
|
||
;;:tag-glyph (tree-widget-find-image "end-guide")
|
||
:format "%t"
|
||
)
|
||
|
||
(define-widget 'tree-widget-no-guide 'item
|
||
"Invisible vertical guide line."
|
||
:tag " "
|
||
;;:tag-glyph (tree-widget-find-image "no-guide")
|
||
:format "%t"
|
||
)
|
||
|
||
(define-widget 'tree-widget-handle 'item
|
||
"Horizontal guide line that joins a vertical guide line to a node."
|
||
:tag "-"
|
||
;;:tag-glyph (tree-widget-find-image "handle")
|
||
:format "%t"
|
||
)
|
||
|
||
(define-widget 'tree-widget-no-handle 'item
|
||
"Invisible handle."
|
||
:tag " "
|
||
;;:tag-glyph (tree-widget-find-image "no-handle")
|
||
:format "%t"
|
||
)
|
||
|
||
(define-widget 'tree-widget 'default
|
||
"Tree widget."
|
||
:format "%v"
|
||
:convert-widget 'tree-widget-convert-widget
|
||
:value-get 'widget-value-value-get
|
||
:value-delete 'widget-children-value-delete
|
||
:value-create 'tree-widget-value-create
|
||
:action 'tree-widget-action
|
||
:help-echo 'tree-widget-help-echo
|
||
:expander-p 'tree-widget-expander-p
|
||
:open-icon 'tree-widget-open-icon
|
||
:close-icon 'tree-widget-close-icon
|
||
:empty-icon 'tree-widget-empty-icon
|
||
:leaf-icon 'tree-widget-leaf-icon
|
||
:guide 'tree-widget-guide
|
||
:end-guide 'tree-widget-end-guide
|
||
:no-guide 'tree-widget-no-guide
|
||
:handle 'tree-widget-handle
|
||
:no-handle 'tree-widget-no-handle
|
||
)
|
||
|
||
;;; Widget support functions
|
||
;;
|
||
(defun tree-widget-p (widget)
|
||
"Return non-nil if WIDGET is a tree-widget."
|
||
(let ((type (widget-type widget)))
|
||
(while (and type (not (eq type 'tree-widget)))
|
||
(setq type (widget-type (get type 'widget-type))))
|
||
(eq type 'tree-widget)))
|
||
|
||
(defun tree-widget-node (widget)
|
||
"Return WIDGET's :node child widget.
|
||
If not found, setup an `item' widget as default.
|
||
Signal an error if the :node widget is a tree-widget.
|
||
WIDGET is, or derives from, a tree-widget."
|
||
(let ((node (widget-get widget :node)))
|
||
(if node
|
||
;; Check that the :node widget is not a tree-widget.
|
||
(and (tree-widget-p node)
|
||
(error "Invalid tree-widget :node %S" node))
|
||
;; Setup an item widget as default :node.
|
||
(setq node `(item :tag ,(or (widget-get widget :tag)
|
||
(widget-princ-to-string
|
||
(widget-value widget)))))
|
||
(widget-put widget :node node))
|
||
node))
|
||
|
||
(defun tree-widget-keep (arg widget)
|
||
"Save in ARG the WIDGET's properties specified by :keep."
|
||
(dolist (prop (widget-get widget :keep))
|
||
(widget-put arg prop (widget-get widget prop))))
|
||
|
||
(defun tree-widget-children-value-save (widget &optional args node)
|
||
"Save WIDGET children values.
|
||
WIDGET is, or derives from, a tree-widget.
|
||
Children properties and values are saved in ARGS if non-nil, else in
|
||
WIDGET's :args property value. Properties and values of the
|
||
WIDGET's :node sub-widget are saved in NODE if non-nil, else in
|
||
WIDGET's :node sub-widget."
|
||
(let ((args (cons (or node (widget-get widget :node))
|
||
(or args (widget-get widget :args))))
|
||
(children (widget-get widget :children))
|
||
arg child)
|
||
(while (and args children)
|
||
(setq arg (car args)
|
||
args (cdr args)
|
||
child (car children)
|
||
children (cdr children))
|
||
(if (tree-widget-p child)
|
||
;;;; The child is a tree node.
|
||
(progn
|
||
;; Backtrack :args and :node properties.
|
||
(widget-put arg :args (widget-get child :args))
|
||
(widget-put arg :node (widget-get child :node))
|
||
;; Save :open property.
|
||
(widget-put arg :open (widget-get child :open))
|
||
;; The node is open.
|
||
(when (widget-get child :open)
|
||
;; Save the widget value.
|
||
(widget-put arg :value (widget-value child))
|
||
;; Save properties specified in :keep.
|
||
(tree-widget-keep arg child)
|
||
;; Save children.
|
||
(tree-widget-children-value-save
|
||
child (widget-get arg :args) (widget-get arg :node))))
|
||
;;;; Another non tree node.
|
||
;; Save the widget value.
|
||
(widget-put arg :value (widget-value child))
|
||
;; Save properties specified in :keep.
|
||
(tree-widget-keep arg child)))))
|
||
|
||
;;; Widget creation
|
||
;;
|
||
(defvar tree-widget-before-create-icon-functions nil
|
||
"Hooks run before to create a tree-widget icon.
|
||
Each function is passed the icon widget not yet created.
|
||
The value of the icon widget :node property is a tree :node widget or
|
||
a leaf node widget, not yet created.
|
||
This hook can be used to dynamically change properties of the icon and
|
||
associated node widgets. For example, to dynamically change the look
|
||
and feel of the tree-widget by changing the values of the :tag
|
||
and :glyph-name properties of the icon widget.
|
||
This hook should be local in the buffer setup to display widgets.")
|
||
|
||
(defun tree-widget-icon-create (icon)
|
||
"Create the ICON widget."
|
||
(run-hook-with-args 'tree-widget-before-create-icon-functions icon)
|
||
(widget-put icon :tag-glyph
|
||
(tree-widget-find-image (widget-get icon :glyph-name)))
|
||
;; Ensure there is at least one char to display the image.
|
||
(and (widget-get icon :tag-glyph)
|
||
(equal "" (or (widget-get icon :tag) ""))
|
||
(widget-put icon :tag " "))
|
||
(widget-default-create icon)
|
||
;; Insert space between the icon and the node widget.
|
||
(insert-char ? 1)
|
||
(put-text-property
|
||
(1- (point)) (point)
|
||
'display (list 'space :width tree-widget-space-width)))
|
||
|
||
(defun tree-widget-convert-widget (widget)
|
||
"Convert :args as widget types in WIDGET."
|
||
(let ((tree (widget-types-convert-widget widget)))
|
||
;; Compatibility
|
||
(widget-put tree :expander (or (widget-get tree :expander)
|
||
(widget-get tree :dynargs)))
|
||
tree))
|
||
|
||
(defvar widget-glyph-enable) ; XEmacs
|
||
|
||
(defun tree-widget-value-create (tree)
|
||
"Create the TREE tree-widget."
|
||
(let* ((node (tree-widget-node tree))
|
||
(flags (widget-get tree :tree-widget--guide-flags))
|
||
(indent (widget-get tree :indent))
|
||
;; Setup widget's image support. Looking up for images, and
|
||
;; setting widgets' :tag-glyph is done here, to allow to
|
||
;; dynamically change the image theme.
|
||
(widget-image-enable (tree-widget-use-image-p)) ; Emacs
|
||
(widget-glyph-enable widget-image-enable) ; XEmacs
|
||
children buttons)
|
||
(and indent (not (widget-get tree :parent))
|
||
(insert-char ?\ indent))
|
||
(if (widget-get tree :open)
|
||
;;;; Expanded node.
|
||
(let ((args (widget-get tree :args))
|
||
(guide (widget-get tree :guide))
|
||
(noguide (widget-get tree :no-guide))
|
||
(endguide (widget-get tree :end-guide))
|
||
(handle (widget-get tree :handle))
|
||
(nohandle (widget-get tree :no-handle))
|
||
(guidi (tree-widget-find-image "guide"))
|
||
(noguidi (tree-widget-find-image "no-guide"))
|
||
(endguidi (tree-widget-find-image "end-guide"))
|
||
(handli (tree-widget-find-image "handle"))
|
||
(nohandli (tree-widget-find-image "no-handle")))
|
||
;; Request children at run time, when requested.
|
||
(when (and (widget-get tree :expander)
|
||
(widget-apply tree :expander-p))
|
||
(setq args (mapcar 'widget-convert
|
||
(widget-apply tree :expander)))
|
||
(widget-put tree :args args))
|
||
;; Defer the node widget creation after icon creation.
|
||
(widget-put tree :node (widget-convert node))
|
||
;; Create the icon widget for the expanded tree.
|
||
(push (widget-create-child-and-convert
|
||
tree (widget-get tree (if args :open-icon :empty-icon))
|
||
;; Pass the node widget to child.
|
||
:node (widget-get tree :node))
|
||
buttons)
|
||
;; Create the tree node widget.
|
||
(push (widget-create-child tree (widget-get tree :node))
|
||
children)
|
||
;; Update the icon :node with the created node widget.
|
||
(widget-put (car buttons) :node (car children))
|
||
;; Create the tree children.
|
||
(while args
|
||
(setq node (car args)
|
||
args (cdr args))
|
||
(and indent (insert-char ?\ indent))
|
||
;; Insert guide lines elements from previous levels.
|
||
(dolist (f (reverse flags))
|
||
(widget-create-child-and-convert
|
||
tree (if f guide noguide)
|
||
:tag-glyph (if f guidi noguidi))
|
||
(widget-create-child-and-convert
|
||
tree nohandle :tag-glyph nohandli))
|
||
;; Insert guide line element for this level.
|
||
(widget-create-child-and-convert
|
||
tree (if args guide endguide)
|
||
:tag-glyph (if args guidi endguidi))
|
||
;; Insert the node handle line
|
||
(widget-create-child-and-convert
|
||
tree handle :tag-glyph handli)
|
||
(if (tree-widget-p node)
|
||
;; Create a sub-tree node.
|
||
(push (widget-create-child-and-convert
|
||
tree node :tree-widget--guide-flags
|
||
(cons (if args t) flags))
|
||
children)
|
||
;; Create the icon widget for a leaf node.
|
||
(push (widget-create-child-and-convert
|
||
tree (widget-get tree :leaf-icon)
|
||
;; At this point the node widget isn't yet created.
|
||
:node (setq node (widget-convert
|
||
node :tree-widget--guide-flags
|
||
(cons (if args t) flags)))
|
||
:tree-widget--leaf-flag t)
|
||
buttons)
|
||
;; Create the leaf node widget.
|
||
(push (widget-create-child tree node) children)
|
||
;; Update the icon :node with the created node widget.
|
||
(widget-put (car buttons) :node (car children)))))
|
||
;;;; Collapsed node.
|
||
;; Defer the node widget creation after icon creation.
|
||
(widget-put tree :node (widget-convert node))
|
||
;; Create the icon widget for the collapsed tree.
|
||
(push (widget-create-child-and-convert
|
||
tree (widget-get tree :close-icon)
|
||
;; Pass the node widget to child.
|
||
:node (widget-get tree :node))
|
||
buttons)
|
||
;; Create the tree node widget.
|
||
(push (widget-create-child tree (widget-get tree :node))
|
||
children)
|
||
;; Update the icon :node with the created node widget.
|
||
(widget-put (car buttons) :node (car children)))
|
||
;; Save widget children and buttons. The tree-widget :node child
|
||
;; is the first element in :children.
|
||
(widget-put tree :children (nreverse children))
|
||
(widget-put tree :buttons buttons)))
|
||
|
||
;;; Widget callbacks
|
||
;;
|
||
(defsubst tree-widget-leaf-node-icon-p (icon)
|
||
"Return non-nil if ICON is a leaf node icon.
|
||
That is, if its :node property value is a leaf node widget."
|
||
(widget-get icon :tree-widget--leaf-flag))
|
||
|
||
(defun tree-widget-icon-action (icon &optional event)
|
||
"Handle the ICON widget :action.
|
||
If ICON :node is a leaf node it handles the :action. The tree-widget
|
||
parent of ICON handles the :action otherwise.
|
||
Pass the received EVENT to :action."
|
||
(let ((node (widget-get icon (if (tree-widget-leaf-node-icon-p icon)
|
||
:node :parent))))
|
||
(widget-apply node :action event)))
|
||
|
||
(defun tree-widget-icon-help-echo (icon)
|
||
"Return the help-echo string of ICON.
|
||
If ICON :node is a leaf node it handles the :help-echo. The tree-widget
|
||
parent of ICON handles the :help-echo otherwise."
|
||
(let* ((node (widget-get icon (if (tree-widget-leaf-node-icon-p icon)
|
||
:node :parent)))
|
||
(help-echo (widget-get node :help-echo)))
|
||
(if (functionp help-echo)
|
||
(funcall help-echo node)
|
||
help-echo)))
|
||
|
||
(defvar tree-widget-after-toggle-functions nil
|
||
"Hooks run after toggling a tree-widget expansion.
|
||
Each function is passed a tree-widget. If the value of the :open
|
||
property is non-nil the tree has been expanded, else collapsed.
|
||
This hook should be local in the buffer setup to display widgets.")
|
||
|
||
(defun tree-widget-action (tree &optional _event)
|
||
"Handle the :action of the TREE tree-widget.
|
||
That is, toggle expansion of the TREE tree-widget.
|
||
Ignore the EVENT argument."
|
||
(let ((open (not (widget-get tree :open))))
|
||
(or open
|
||
;; Before to collapse the node, save children values so next
|
||
;; open can recover them.
|
||
(tree-widget-children-value-save tree))
|
||
(widget-put tree :open open)
|
||
(widget-value-set tree open)
|
||
(run-hook-with-args 'tree-widget-after-toggle-functions tree)))
|
||
|
||
(defun tree-widget-help-echo (tree)
|
||
"Return the help-echo string of the TREE tree-widget."
|
||
(if (widget-get tree :open)
|
||
"Collapse node"
|
||
"Expand node"))
|
||
|
||
(defun tree-widget-expander-p (tree)
|
||
"Return non-nil if the TREE tree-widget :expander has to be called.
|
||
That is, if TREE :args is nil."
|
||
(null (widget-get tree :args)))
|
||
|
||
(provide 'tree-widget)
|
||
|
||
;;; tree-widget.el ends here
|