mirror of
https://git.savannah.gnu.org/git/emacs.git
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2543 lines
81 KiB
EmacsLisp
2543 lines
81 KiB
EmacsLisp
;;; wid-edit.el --- Functions for creating and using widgets.
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;;
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;; Copyright (C) 1996, 1997 Free Software Foundation, Inc.
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;;
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;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
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;; Keywords: extensions
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;; Version: 1.71
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;; X-URL: http://www.dina.kvl.dk/~abraham/custom/
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;;; Commentary:
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;;
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;; See `widget.el'.
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;;; Code:
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(require 'widget)
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(eval-and-compile
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(require 'cl))
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;;; Compatibility.
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(eval-and-compile
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(autoload 'pp-to-string "pp")
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(autoload 'Info-goto-node "info")
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(when (string-match "XEmacs" emacs-version)
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(condition-case nil
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(require 'overlay)
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(error (load-library "x-overlay"))))
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(if (string-match "XEmacs" emacs-version)
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;; XEmacs spell `intangible' as `atomic'.
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(defun widget-make-intangible (from to side)
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"Make text between FROM and TO atomic with regard to movement.
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Third argument should be `start-open' if it should be sticky to the rear,
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and `end-open' if it should sticky to the front."
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(require 'atomic-extents)
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(let ((ext (make-extent from to)))
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;; XEmacs doesn't understant different kinds of read-only, so
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;; we have to use extents instead.
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(put-text-property from to 'read-only nil)
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(set-extent-property ext 'read-only t)
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(set-extent-property ext 'start-open nil)
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(set-extent-property ext 'end-open nil)
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(set-extent-property ext side t)
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(set-extent-property ext 'atomic t)))
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(defun widget-make-intangible (from to size)
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"Make text between FROM and TO intangible."
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(put-text-property from to 'intangible 'front)))
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;; The following should go away when bundled with Emacs.
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(condition-case ()
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(require 'custom)
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(error nil))
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(unless (and (featurep 'custom) (fboundp 'custom-declare-variable))
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;; We have the old custom-library, hack around it!
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(defmacro defgroup (&rest args) nil)
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(defmacro defcustom (var value doc &rest args)
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`(defvar ,var ,value ,doc))
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(defmacro defface (&rest args) nil)
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(define-widget-keywords :prefix :tag :load :link :options :type :group)
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(when (fboundp 'copy-face)
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(copy-face 'default 'widget-documentation-face)
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(copy-face 'bold 'widget-button-face)
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(copy-face 'italic 'widget-field-face)))
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(unless (fboundp 'event-point)
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;; XEmacs function missing in Emacs.
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(defun event-point (event)
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"Return the character position of the given mouse-motion, button-press,
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or button-release event. If the event did not occur over a window, or did
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not occur over text, then this returns nil. Otherwise, it returns an index
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into the buffer visible in the event's window."
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(posn-point (event-start event))))
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(unless (fboundp 'error-message-string)
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;; Emacs function missing in XEmacs.
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(defun error-message-string (obj)
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"Convert an error value to an error message."
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(let ((buf (get-buffer-create " *error-message*")))
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(erase-buffer buf)
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(display-error obj buf)
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(buffer-string buf)))))
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;;; Customization.
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(defgroup widgets nil
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"Customization support for the Widget Library."
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:link '(custom-manual "(widget)Top")
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:link '(url-link :tag "Development Page"
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"http://www.dina.kvl.dk/~abraham/custom/")
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:prefix "widget-"
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:group 'extensions
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:group 'faces
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:group 'hypermedia)
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(defface widget-documentation-face '((((class color)
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(background dark))
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(:foreground "lime green"))
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(((class color)
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(background light))
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(:foreground "dark green"))
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(t nil))
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"Face used for documentation text."
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:group 'widgets)
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(defface widget-button-face '((t (:bold t)))
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"Face used for widget buttons."
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:group 'widgets)
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(defcustom widget-mouse-face 'highlight
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"Face used for widget buttons when the mouse is above them."
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:type 'face
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:group 'widgets)
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(defface widget-field-face '((((class grayscale color)
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(background light))
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(:background "light gray"))
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(((class grayscale color)
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(background dark))
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(:background "dark gray"))
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(t
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(:italic t)))
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"Face used for editable fields."
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:group 'widgets)
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(defcustom widget-menu-max-size 40
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"Largest number of items allowed in a popup-menu.
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Larger menus are read through the minibuffer."
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:group 'widgets
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:type 'integer)
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;;; Utility functions.
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;;
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;; These are not really widget specific.
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(defsubst widget-plist-member (plist prop)
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;; Return non-nil if PLIST has the property PROP.
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;; PLIST is a property list, which is a list of the form
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;; (PROP1 VALUE1 PROP2 VALUE2 ...). PROP is a symbol.
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;; Unlike `plist-get', this allows you to distinguish between a missing
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;; property and a property with the value nil.
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;; The value is actually the tail of PLIST whose car is PROP.
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(while (and plist (not (eq (car plist) prop)))
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(setq plist (cdr (cdr plist))))
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plist)
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(defun widget-princ-to-string (object)
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;; Return string representation of OBJECT, any Lisp object.
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;; No quoting characters are used; no delimiters are printed around
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;; the contents of strings.
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(save-excursion
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(set-buffer (get-buffer-create " *widget-tmp*"))
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(erase-buffer)
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(let ((standard-output (current-buffer)))
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(princ object))
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(buffer-string)))
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(defun widget-clear-undo ()
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"Clear all undo information."
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(buffer-disable-undo (current-buffer))
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(buffer-enable-undo))
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(defun widget-choose (title items &optional event)
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"Choose an item from a list.
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First argument TITLE is the name of the list.
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Second argument ITEMS is an alist (NAME . VALUE).
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Optional third argument EVENT is an input event.
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The user is asked to choose between each NAME from the items alist,
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and the VALUE of the chosen element will be returned. If EVENT is a
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mouse event, and the number of elements in items is less than
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`widget-menu-max-size', a popup menu will be used, otherwise the
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minibuffer."
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(cond ((and (< (length items) widget-menu-max-size)
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event (fboundp 'x-popup-menu) window-system)
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;; We are in Emacs-19, pressed by the mouse
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(x-popup-menu event
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(list title (cons "" items))))
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((and (< (length items) widget-menu-max-size)
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event (fboundp 'popup-menu) window-system)
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;; We are in XEmacs, pressed by the mouse
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(let ((val (get-popup-menu-response
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(cons title
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(mapcar
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(function
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(lambda (x)
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(vector (car x) (list (car x)) t)))
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items)))))
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(setq val (and val
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(listp (event-object val))
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(stringp (car-safe (event-object val)))
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(car (event-object val))))
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(cdr (assoc val items))))
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(t
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(let ((val (completing-read (concat title ": ") items nil t)))
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(if (stringp val)
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(let ((try (try-completion val items)))
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(when (stringp try)
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(setq val try))
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(cdr (assoc val items)))
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nil)))))
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(defun widget-get-sibling (widget)
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"Get the item WIDGET is assumed to toggle.
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This is only meaningful for radio buttons or checkboxes in a list."
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(let* ((parent (widget-get widget :parent))
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(children (widget-get parent :children))
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child)
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(catch 'child
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(while children
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(setq child (car children)
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children (cdr children))
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(when (eq (widget-get child :button) widget)
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(throw 'child child)))
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nil)))
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;;; Widget text specifications.
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;;
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;; These functions are for specifying text properties.
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(defun widget-specify-none (from to)
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;; Clear all text properties between FROM and TO.
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(set-text-properties from to nil))
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(defun widget-specify-text (from to)
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;; Default properties.
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(add-text-properties from to (list 'read-only t
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'front-sticky t
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'start-open t
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'end-open t
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'rear-nonsticky nil)))
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(defun widget-specify-field (widget from to)
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;; Specify editable button for WIDGET between FROM and TO.
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(widget-specify-field-update widget from to)
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;; Make it possible to edit the front end of the field.
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(add-text-properties (1- from) from (list 'rear-nonsticky t
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'end-open t
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'invisible t))
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(when (or (string-match "\\(.\\|\n\\)%v" (widget-get widget :format))
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(widget-get widget :hide-front-space))
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;; WARNING: This is going to lose horrible if the character just
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;; before the field can be modified (e.g. if it belongs to a
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;; choice widget). We try to compensate by checking the format
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;; string, and hope the user hasn't changed the :create method.
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(widget-make-intangible (- from 2) from 'end-open))
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;; Make it possible to edit back end of the field.
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(add-text-properties to (1+ to) (list 'front-sticky nil
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'read-only t
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'start-open t))
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(cond ((widget-get widget :size)
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(put-text-property to (1+ to) 'invisible t)
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(when (or (string-match "%v\\(.\\|\n\\)" (widget-get widget :format))
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(widget-get widget :hide-rear-space))
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;; WARNING: This is going to lose horrible if the character just
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;; after the field can be modified (e.g. if it belongs to a
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;; choice widget). We try to compensate by checking the format
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;; string, and hope the user hasn't changed the :create method.
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(widget-make-intangible to (+ to 2) 'start-open)))
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((string-match "XEmacs" emacs-version)
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;; XEmacs does not allow you to insert before a read-only
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;; character, even if it is start.open.
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;; XEmacs does allow you to delete an read-only extent, so
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;; making the terminating newline read only doesn't help.
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;; I tried putting an invisible intangible read-only space
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;; before the newline, which gave really weird effects.
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;; So for now, we just have trust the user not to delete the
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;; newline.
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(put-text-property to (1+ to) 'read-only nil))))
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(defun widget-specify-field-update (widget from to)
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;; Specify editable button for WIDGET between FROM and TO.
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(let ((map (widget-get widget :keymap))
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(secret (widget-get widget :secret))
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(secret-to to)
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(size (widget-get widget :size))
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(face (or (widget-get widget :value-face)
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'widget-field-face))
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(help-echo (widget-get widget :help-echo))
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(help-property (if (featurep 'balloon-help)
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'balloon-help
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'help-echo)))
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(unless (or (stringp help-echo) (null help-echo))
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(setq help-echo 'widget-mouse-help))
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(when secret
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(while (and size
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(not (zerop size))
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(> secret-to from)
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(eq (char-after (1- secret-to)) ?\ ))
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(setq secret-to (1- secret-to)))
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(save-excursion
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(goto-char from)
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(while (< (point) secret-to)
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(let ((old (get-text-property (point) 'secret)))
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(when old
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(subst-char-in-region (point) (1+ (point)) secret old)))
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(forward-char))))
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(set-text-properties from to (list 'field widget
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'read-only nil
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'keymap map
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'local-map map
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help-property help-echo
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'face face))
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(when secret
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(save-excursion
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(goto-char from)
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(while (< (point) secret-to)
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(let ((old (following-char)))
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(subst-char-in-region (point) (1+ (point)) old secret)
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(put-text-property (point) (1+ (point)) 'secret old))
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(forward-char))))
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(unless (widget-get widget :size)
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(add-text-properties to (1+ to) (list 'field widget
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help-property help-echo
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'face face)))
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(add-text-properties to (1+ to) (list 'local-map map
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'keymap map))))
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(defun widget-specify-button (widget from to)
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;; Specify button for WIDGET between FROM and TO.
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(let ((face (widget-apply widget :button-face-get))
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(help-echo (widget-get widget :help-echo))
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(help-property (if (featurep 'balloon-help)
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'balloon-help
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'help-echo)))
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(unless (or (null help-echo) (stringp help-echo))
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(setq help-echo 'widget-mouse-help))
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(add-text-properties from to (list 'button widget
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'mouse-face widget-mouse-face
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'start-open t
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'end-open t
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help-property help-echo
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'face face))))
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(defun widget-mouse-help (extent)
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"Find mouse help string for button in extent."
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(let* ((widget (widget-at (extent-start-position extent)))
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(help-echo (and widget (widget-get widget :help-echo))))
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(cond ((stringp help-echo)
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help-echo)
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((and (symbolp help-echo) (fboundp help-echo)
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(stringp (setq help-echo (funcall help-echo widget))))
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help-echo)
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(t
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(format "(widget %S :help-echo %S)" widget help-echo)))))
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(defun widget-specify-sample (widget from to)
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;; Specify sample for WIDGET between FROM and TO.
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(let ((face (widget-apply widget :sample-face-get)))
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(when face
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(add-text-properties from to (list 'start-open t
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'end-open t
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'face face)))))
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(defun widget-specify-doc (widget from to)
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;; Specify documentation for WIDGET between FROM and TO.
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(add-text-properties from to (list 'widget-doc widget
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'face 'widget-documentation-face)))
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(defmacro widget-specify-insert (&rest form)
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;; Execute FORM without inheriting any text properties.
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`(save-restriction
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(let ((inhibit-read-only t)
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result
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after-change-functions)
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(insert "<>")
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(narrow-to-region (- (point) 2) (point))
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(widget-specify-none (point-min) (point-max))
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(goto-char (1+ (point-min)))
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(setq result (progn ,@form))
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(delete-region (point-min) (1+ (point-min)))
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(delete-region (1- (point-max)) (point-max))
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(goto-char (point-max))
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result)))
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(defface widget-inactive-face '((((class grayscale color)
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(background dark))
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(:foreground "light gray"))
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(((class grayscale color)
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(background light))
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(:foreground "dark gray"))
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(t
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(:italic t)))
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"Face used for inactive widgets."
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:group 'widgets)
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(defun widget-specify-inactive (widget from to)
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"Make WIDGET inactive for user modifications."
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(unless (widget-get widget :inactive)
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(let ((overlay (make-overlay from to nil t nil)))
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(overlay-put overlay 'face 'widget-inactive-face)
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(overlay-put overlay 'evaporate 't)
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(overlay-put overlay (if (string-match "XEmacs" emacs-version)
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'read-only
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'modification-hooks) '(widget-overlay-inactive))
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(widget-put widget :inactive overlay))))
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(defun widget-overlay-inactive (&rest junk)
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"Ignoring the arguments, signal an error."
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(unless inhibit-read-only
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(error "Attempt to modify inactive widget")))
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(defun widget-specify-active (widget)
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"Make WIDGET active for user modifications."
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(let ((inactive (widget-get widget :inactive)))
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(when inactive
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(delete-overlay inactive)
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(widget-put widget :inactive nil))))
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;;; Widget Properties.
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(defsubst widget-type (widget)
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"Return the type of WIDGET, a symbol."
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(car widget))
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(defun widget-put (widget property value)
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"In WIDGET set PROPERTY to VALUE.
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The value can later be retrived with `widget-get'."
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(setcdr widget (plist-put (cdr widget) property value)))
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(defun widget-get (widget property)
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"In WIDGET, get the value of PROPERTY.
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The value could either be specified when the widget was created, or
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later with `widget-put'."
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(let ((missing t)
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value tmp)
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(while missing
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(cond ((setq tmp (widget-plist-member (cdr widget) property))
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(setq value (car (cdr tmp))
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missing nil))
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((setq tmp (car widget))
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(setq widget (get tmp 'widget-type)))
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(t
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(setq missing nil))))
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value))
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(defun widget-member (widget property)
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"Non-nil iff there is a definition in WIDGET for PROPERTY."
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(cond ((widget-plist-member (cdr widget) property)
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t)
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((car widget)
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(widget-member (get (car widget) 'widget-type) property))
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(t nil)))
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;;;###autoload
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(defun widget-apply (widget property &rest args)
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"Apply the value of WIDGET's PROPERTY to the widget itself.
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ARGS are passed as extra arguments to the function."
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(apply (widget-get widget property) widget args))
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(defun widget-value (widget)
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"Extract the current value of WIDGET."
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(widget-apply widget
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:value-to-external (widget-apply widget :value-get)))
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(defun widget-value-set (widget value)
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"Set the current value of WIDGET to VALUE."
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(widget-apply widget
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:value-set (widget-apply widget
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:value-to-internal value)))
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(defun widget-match-inline (widget vals)
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;; In WIDGET, match the start of VALS.
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(cond ((widget-get widget :inline)
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(widget-apply widget :match-inline vals))
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((and vals
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(widget-apply widget :match (car vals)))
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(cons (list (car vals)) (cdr vals)))
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(t nil)))
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(defun widget-apply-action (widget &optional event)
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"Apply :action in WIDGET in response to EVENT."
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(if (widget-apply widget :active)
|
|
(widget-apply widget :action event)
|
|
(error "Attempt to perform action on inactive widget")))
|
|
|
|
;;; Glyphs.
|
|
|
|
(defcustom widget-glyph-directory (concat data-directory "custom/")
|
|
"Where widget glyphs are located.
|
|
If this variable is nil, widget will try to locate the directory
|
|
automatically. This does not work yet."
|
|
:group 'widgets
|
|
:type 'directory)
|
|
|
|
(defcustom widget-glyph-enable t
|
|
"If non nil, use glyphs in images when available."
|
|
:group 'widgets
|
|
:type 'boolean)
|
|
|
|
(defun widget-glyph-insert (widget tag image)
|
|
"In WIDGET, insert the text TAG or, if supported, IMAGE.
|
|
IMAGE should either be a glyph, or a name sans extension of an xpm or
|
|
xbm file located in `widget-glyph-directory'.
|
|
|
|
WARNING: If you call this with a glyph, and you want the user to be
|
|
able to activate the glyph, make sure it is unique. If you use the
|
|
same glyph for multiple widgets, activating any of the glyphs will
|
|
cause the last created widget to be activated."
|
|
(cond ((not (and (string-match "XEmacs" emacs-version)
|
|
widget-glyph-enable
|
|
(fboundp 'make-glyph)
|
|
image))
|
|
;; We don't want or can't use glyphs.
|
|
(insert tag))
|
|
((and (fboundp 'glyphp)
|
|
(glyphp image))
|
|
;; Already a glyph. Insert it.
|
|
(widget-glyph-insert-glyph widget tag image))
|
|
(t
|
|
;; A string. Look it up in.
|
|
(let ((file (concat widget-glyph-directory
|
|
(if (string-match "/\\'" widget-glyph-directory)
|
|
""
|
|
"/")
|
|
image
|
|
(if (featurep 'xpm) ".xpm" ".xbm"))))
|
|
(if (file-readable-p file)
|
|
(widget-glyph-insert-glyph widget tag (make-glyph file))
|
|
;; File not readable, give up.
|
|
(insert tag))))))
|
|
|
|
(defun widget-glyph-insert-glyph (widget tag glyph)
|
|
"In WIDGET, with alternative text TAG, insert GLYPH."
|
|
(set-glyph-image glyph (cons 'tty tag))
|
|
(set-glyph-property glyph 'widget widget)
|
|
(insert "*")
|
|
(add-text-properties (1- (point)) (point)
|
|
(list 'invisible t
|
|
'end-glyph glyph))
|
|
(let ((help-echo (widget-get widget :help-echo)))
|
|
(when help-echo
|
|
(let ((extent (extent-at (1- (point)) nil 'end-glyph))
|
|
(help-property (if (featurep 'balloon-help)
|
|
'balloon-help
|
|
'help-echo)))
|
|
(set-extent-property extent help-property (if (stringp help-echo)
|
|
help-echo
|
|
'widget-mouse-help))))))
|
|
|
|
;;; Creating Widgets.
|
|
|
|
;;;###autoload
|
|
(defun widget-create (type &rest args)
|
|
"Create widget of TYPE.
|
|
The optional ARGS are additional keyword arguments."
|
|
(let ((widget (apply 'widget-convert type args)))
|
|
(widget-apply widget :create)
|
|
widget))
|
|
|
|
(defun widget-create-child-and-convert (parent type &rest args)
|
|
"As part of the widget PARENT, create a child widget TYPE.
|
|
The child is converted, using the keyword arguments ARGS."
|
|
(let ((widget (apply 'widget-convert type args)))
|
|
(widget-put widget :parent parent)
|
|
(unless (widget-get widget :indent)
|
|
(widget-put widget :indent (+ (or (widget-get parent :indent) 0)
|
|
(or (widget-get widget :extra-offset) 0)
|
|
(widget-get parent :offset))))
|
|
(widget-apply widget :create)
|
|
widget))
|
|
|
|
(defun widget-create-child (parent type)
|
|
"Create widget of TYPE."
|
|
(let ((widget (copy-list type)))
|
|
(widget-put widget :parent parent)
|
|
(unless (widget-get widget :indent)
|
|
(widget-put widget :indent (+ (or (widget-get parent :indent) 0)
|
|
(or (widget-get widget :extra-offset) 0)
|
|
(widget-get parent :offset))))
|
|
(widget-apply widget :create)
|
|
widget))
|
|
|
|
(defun widget-create-child-value (parent type value)
|
|
"Create widget of TYPE with value VALUE."
|
|
(let ((widget (copy-list type)))
|
|
(widget-put widget :value (widget-apply widget :value-to-internal value))
|
|
(widget-put widget :parent parent)
|
|
(unless (widget-get widget :indent)
|
|
(widget-put widget :indent (+ (or (widget-get parent :indent) 0)
|
|
(or (widget-get widget :extra-offset) 0)
|
|
(widget-get parent :offset))))
|
|
(widget-apply widget :create)
|
|
widget))
|
|
|
|
;;;###autoload
|
|
(defun widget-delete (widget)
|
|
"Delete WIDGET."
|
|
(widget-apply widget :delete))
|
|
|
|
(defun widget-convert (type &rest args)
|
|
"Convert TYPE to a widget without inserting it in the buffer.
|
|
The optional ARGS are additional keyword arguments."
|
|
;; Don't touch the type.
|
|
(let* ((widget (if (symbolp type)
|
|
(list type)
|
|
(copy-list type)))
|
|
(current widget)
|
|
(keys args))
|
|
;; First set the :args keyword.
|
|
(while (cdr current) ;Look in the type.
|
|
(let ((next (car (cdr current))))
|
|
(if (and (symbolp next) (eq (aref (symbol-name next) 0) ?:))
|
|
(setq current (cdr (cdr current)))
|
|
(setcdr current (list :args (cdr current)))
|
|
(setq current nil))))
|
|
(while args ;Look in the args.
|
|
(let ((next (nth 0 args)))
|
|
(if (and (symbolp next) (eq (aref (symbol-name next) 0) ?:))
|
|
(setq args (nthcdr 2 args))
|
|
(widget-put widget :args args)
|
|
(setq args nil))))
|
|
;; Then Convert the widget.
|
|
(setq type widget)
|
|
(while type
|
|
(let ((convert-widget (plist-get (cdr type) :convert-widget)))
|
|
(if convert-widget
|
|
(setq widget (funcall convert-widget widget))))
|
|
(setq type (get (car type) 'widget-type)))
|
|
;; Finally set the keyword args.
|
|
(while keys
|
|
(let ((next (nth 0 keys)))
|
|
(if (and (symbolp next) (eq (aref (symbol-name next) 0) ?:))
|
|
(progn
|
|
(widget-put widget next (nth 1 keys))
|
|
(setq keys (nthcdr 2 keys)))
|
|
(setq keys nil))))
|
|
;; Convert the :value to internal format.
|
|
(if (widget-member widget :value)
|
|
(let ((value (widget-get widget :value)))
|
|
(widget-put widget
|
|
:value (widget-apply widget :value-to-internal value))))
|
|
;; Return the newly create widget.
|
|
widget))
|
|
|
|
(defun widget-insert (&rest args)
|
|
"Call `insert' with ARGS and make the text read only."
|
|
(let ((inhibit-read-only t)
|
|
after-change-functions
|
|
(from (point)))
|
|
(apply 'insert args)
|
|
(widget-specify-text from (point))))
|
|
|
|
;;; Keymap and Commands.
|
|
|
|
(defvar widget-keymap nil
|
|
"Keymap containing useful binding for buffers containing widgets.
|
|
Recommended as a parent keymap for modes using widgets.")
|
|
|
|
(unless widget-keymap
|
|
(setq widget-keymap (make-sparse-keymap))
|
|
(define-key widget-keymap "\C-k" 'widget-kill-line)
|
|
(define-key widget-keymap "\t" 'widget-forward)
|
|
(define-key widget-keymap "\M-\t" 'widget-backward)
|
|
(define-key widget-keymap [(shift tab)] 'widget-backward)
|
|
(define-key widget-keymap [backtab] 'widget-backward)
|
|
(if (string-match "XEmacs" (emacs-version))
|
|
(progn
|
|
(define-key widget-keymap [button2] 'widget-button-click)
|
|
(define-key widget-keymap [button1] 'widget-button1-click))
|
|
(define-key widget-keymap [mouse-2] 'ignore)
|
|
(define-key widget-keymap [down-mouse-2] 'widget-button-click))
|
|
(define-key widget-keymap "\C-m" 'widget-button-press))
|
|
|
|
(defvar widget-global-map global-map
|
|
"Keymap used for events the widget does not handle themselves.")
|
|
(make-variable-buffer-local 'widget-global-map)
|
|
|
|
(defvar widget-field-keymap nil
|
|
"Keymap used inside an editable field.")
|
|
|
|
(unless widget-field-keymap
|
|
(setq widget-field-keymap (copy-keymap widget-keymap))
|
|
(unless (string-match "XEmacs" (emacs-version))
|
|
(define-key widget-field-keymap [menu-bar] 'nil))
|
|
(define-key widget-field-keymap "\C-m" 'widget-field-activate)
|
|
(define-key widget-field-keymap "\C-a" 'widget-beginning-of-line)
|
|
(define-key widget-field-keymap "\C-e" 'widget-end-of-line)
|
|
(set-keymap-parent widget-field-keymap global-map))
|
|
|
|
(defvar widget-text-keymap nil
|
|
"Keymap used inside a text field.")
|
|
|
|
(unless widget-text-keymap
|
|
(setq widget-text-keymap (copy-keymap widget-keymap))
|
|
(unless (string-match "XEmacs" (emacs-version))
|
|
(define-key widget-text-keymap [menu-bar] 'nil))
|
|
(define-key widget-text-keymap "\C-a" 'widget-beginning-of-line)
|
|
(define-key widget-text-keymap "\C-e" 'widget-end-of-line)
|
|
(set-keymap-parent widget-text-keymap global-map))
|
|
|
|
(defun widget-field-activate (pos &optional event)
|
|
"Activate the ediable field at point."
|
|
(interactive "@d")
|
|
(let ((field (get-text-property pos 'field)))
|
|
(if field
|
|
(widget-apply-action field event)
|
|
(call-interactively
|
|
(lookup-key widget-global-map (this-command-keys))))))
|
|
|
|
(defun widget-button-click (event)
|
|
"Activate button below mouse pointer."
|
|
(interactive "@e")
|
|
(cond ((and (fboundp 'event-glyph)
|
|
(event-glyph event))
|
|
(let ((widget (glyph-property (event-glyph event) 'widget)))
|
|
(if widget
|
|
(widget-apply-action widget event)
|
|
(message "You clicked on a glyph."))))
|
|
((event-point event)
|
|
(let ((button (get-text-property (event-point event) 'button)))
|
|
(if button
|
|
(widget-apply-action button event)
|
|
(call-interactively
|
|
(or (lookup-key widget-global-map [ button2 ])
|
|
(lookup-key widget-global-map [ down-mouse-2 ])
|
|
(lookup-key widget-global-map [ mouse-2]))))))
|
|
(t
|
|
(message "You clicked somewhere weird."))))
|
|
|
|
(defun widget-button1-click (event)
|
|
"Activate glyph below mouse pointer."
|
|
(interactive "@e")
|
|
(if (and (fboundp 'event-glyph)
|
|
(event-glyph event))
|
|
(let ((widget (glyph-property (event-glyph event) 'widget)))
|
|
(if widget
|
|
(widget-apply-action widget event)
|
|
(message "You clicked on a glyph.")))
|
|
(call-interactively (lookup-key widget-global-map (this-command-keys)))))
|
|
|
|
(defun widget-button-press (pos &optional event)
|
|
"Activate button at POS."
|
|
(interactive "@d")
|
|
(let ((button (get-text-property pos 'button)))
|
|
(if button
|
|
(widget-apply-action button event)
|
|
(let ((command (lookup-key widget-global-map (this-command-keys))))
|
|
(when (commandp command)
|
|
(call-interactively command))))))
|
|
|
|
(defun widget-move (arg)
|
|
"Move point to the ARG next field or button.
|
|
ARG may be negative to move backward."
|
|
(while (> arg 0)
|
|
(setq arg (1- arg))
|
|
(let ((next (cond ((get-text-property (point) 'button)
|
|
(next-single-property-change (point) 'button))
|
|
((get-text-property (point) 'field)
|
|
(next-single-property-change (point) 'field))
|
|
(t
|
|
(point)))))
|
|
(if (null next) ; Widget extends to end. of buffer
|
|
(setq next (point-min)))
|
|
(let ((button (next-single-property-change next 'button))
|
|
(field (next-single-property-change next 'field)))
|
|
(cond ((or (get-text-property next 'button)
|
|
(get-text-property next 'field))
|
|
(goto-char next))
|
|
((and button field)
|
|
(goto-char (min button field)))
|
|
(button (goto-char button))
|
|
(field (goto-char field))
|
|
(t
|
|
(let ((button (next-single-property-change (point-min) 'button))
|
|
(field (next-single-property-change (point-min) 'field)))
|
|
(cond ((and button field) (goto-char (min button field)))
|
|
(button (goto-char button))
|
|
(field (goto-char field))
|
|
(t
|
|
(error "No buttons or fields found"))))))
|
|
(setq button (widget-at (point)))
|
|
(if (and button (widget-get button :tab-order)
|
|
(< (widget-get button :tab-order) 0))
|
|
(setq arg (1+ arg))))))
|
|
(while (< arg 0)
|
|
(if (= (point-min) (point))
|
|
(forward-char 1))
|
|
(setq arg (1+ arg))
|
|
(let ((previous (cond ((get-text-property (1- (point)) 'button)
|
|
(previous-single-property-change (point) 'button))
|
|
((get-text-property (1- (point)) 'field)
|
|
(previous-single-property-change (point) 'field))
|
|
(t
|
|
(point)))))
|
|
(if (null previous) ; Widget extends to beg. of buffer
|
|
(setq previous (point-max)))
|
|
(let ((button (previous-single-property-change previous 'button))
|
|
(field (previous-single-property-change previous 'field)))
|
|
(cond ((and button field)
|
|
(goto-char (max button field)))
|
|
(button (goto-char button))
|
|
(field (goto-char field))
|
|
(t
|
|
(let ((button (previous-single-property-change
|
|
(point-max) 'button))
|
|
(field (previous-single-property-change
|
|
(point-max) 'field)))
|
|
(cond ((and button field) (goto-char (max button field)))
|
|
(button (goto-char button))
|
|
(field (goto-char field))
|
|
(t
|
|
(error "No buttons or fields found"))))))))
|
|
(let ((button (previous-single-property-change (point) 'button))
|
|
(field (previous-single-property-change (point) 'field)))
|
|
(cond ((and button field)
|
|
(goto-char (max button field)))
|
|
(button (goto-char button))
|
|
(field (goto-char field)))
|
|
(setq button (widget-at (point)))
|
|
(if (and button (widget-get button :tab-order)
|
|
(< (widget-get button :tab-order) 0))
|
|
(setq arg (1- arg)))))
|
|
(widget-echo-help (point))
|
|
(run-hooks 'widget-move-hook))
|
|
|
|
(defun widget-forward (arg)
|
|
"Move point to the next field or button.
|
|
With optional ARG, move across that many fields."
|
|
(interactive "p")
|
|
(run-hooks 'widget-forward-hook)
|
|
(widget-move arg))
|
|
|
|
(defun widget-backward (arg)
|
|
"Move point to the previous field or button.
|
|
With optional ARG, move across that many fields."
|
|
(interactive "p")
|
|
(run-hooks 'widget-backward-hook)
|
|
(widget-move (- arg)))
|
|
|
|
(defun widget-beginning-of-line ()
|
|
"Go to beginning of field or beginning of line, whichever is first."
|
|
(interactive)
|
|
(let ((bol (save-excursion (beginning-of-line) (point)))
|
|
(prev (previous-single-property-change (point) 'field)))
|
|
(goto-char (max bol (or prev bol)))))
|
|
|
|
(defun widget-end-of-line ()
|
|
"Go to end of field or end of line, whichever is first."
|
|
(interactive)
|
|
(let ((bol (save-excursion (end-of-line) (point)))
|
|
(prev (next-single-property-change (point) 'field)))
|
|
(goto-char (min bol (or prev bol)))))
|
|
|
|
(defun widget-kill-line ()
|
|
"Kill to end of field or end of line, whichever is first."
|
|
(interactive)
|
|
(let ((field (get-text-property (point) 'field))
|
|
(newline (save-excursion (search-forward "\n")))
|
|
(next (next-single-property-change (point) 'field)))
|
|
(if (and field (> newline next))
|
|
(kill-region (point) next)
|
|
(call-interactively 'kill-line))))
|
|
|
|
;;; Setting up the buffer.
|
|
|
|
(defvar widget-field-new nil)
|
|
;; List of all newly created editable fields in the buffer.
|
|
(make-variable-buffer-local 'widget-field-new)
|
|
|
|
(defvar widget-field-list nil)
|
|
;; List of all editable fields in the buffer.
|
|
(make-variable-buffer-local 'widget-field-list)
|
|
|
|
(defun widget-setup ()
|
|
"Setup current buffer so editing string widgets works."
|
|
(let ((inhibit-read-only t)
|
|
(after-change-functions nil)
|
|
field)
|
|
(while widget-field-new
|
|
(setq field (car widget-field-new)
|
|
widget-field-new (cdr widget-field-new)
|
|
widget-field-list (cons field widget-field-list))
|
|
(let ((from (widget-get field :value-from))
|
|
(to (widget-get field :value-to)))
|
|
(widget-specify-field field from to)
|
|
(move-marker from (1- from))
|
|
(move-marker to (1+ to)))))
|
|
(widget-clear-undo)
|
|
;; We need to maintain text properties and size of the editing fields.
|
|
(make-local-variable 'after-change-functions)
|
|
(if widget-field-list
|
|
(setq after-change-functions '(widget-after-change))
|
|
(setq after-change-functions nil)))
|
|
|
|
(defvar widget-field-last nil)
|
|
;; Last field containing point.
|
|
(make-variable-buffer-local 'widget-field-last)
|
|
|
|
(defvar widget-field-was nil)
|
|
;; The widget data before the change.
|
|
(make-variable-buffer-local 'widget-field-was)
|
|
|
|
(defun widget-field-find (pos)
|
|
;; Find widget whose editing field is located at POS.
|
|
;; Return nil if POS is not inside and editing field.
|
|
;;
|
|
;; This is only used in `widget-field-modified', since ordinarily
|
|
;; you would just test the field property.
|
|
(let ((fields widget-field-list)
|
|
field found)
|
|
(while fields
|
|
(setq field (car fields)
|
|
fields (cdr fields))
|
|
(let ((from (widget-get field :value-from))
|
|
(to (widget-get field :value-to)))
|
|
(if (and from to (< from pos) (> to pos))
|
|
(setq fields nil
|
|
found field))))
|
|
found))
|
|
|
|
(defun widget-after-change (from to old)
|
|
;; Adjust field size and text properties.
|
|
(condition-case nil
|
|
(let ((field (widget-field-find from))
|
|
(inhibit-read-only t))
|
|
(cond ((null field))
|
|
((not (eq field (widget-field-find to)))
|
|
(debug)
|
|
(message "Error: `widget-after-change' called on two fields"))
|
|
(t
|
|
(let ((size (widget-get field :size)))
|
|
(if size
|
|
(let ((begin (1+ (widget-get field :value-from)))
|
|
(end (1- (widget-get field :value-to))))
|
|
(widget-specify-field-update field begin end)
|
|
(cond ((< (- end begin) size)
|
|
;; Field too small.
|
|
(save-excursion
|
|
(goto-char end)
|
|
(insert-char ?\ (- (+ begin size) end))
|
|
(widget-specify-field-update field
|
|
begin
|
|
(+ begin size))))
|
|
((> (- end begin) size)
|
|
;; Field too large and
|
|
(if (or (< (point) (+ begin size))
|
|
(> (point) end))
|
|
;; Point is outside extra space.
|
|
(setq begin (+ begin size))
|
|
;; Point is within the extra space.
|
|
(setq begin (point)))
|
|
(save-excursion
|
|
(goto-char end)
|
|
(while (and (eq (preceding-char) ?\ )
|
|
(> (point) begin))
|
|
(delete-backward-char 1))))))
|
|
(widget-specify-field-update field from to)))
|
|
(widget-apply field :notify field))))
|
|
(error (debug))))
|
|
|
|
;;; Widget Functions
|
|
;;
|
|
;; These functions are used in the definition of multiple widgets.
|
|
|
|
(defun widget-children-value-delete (widget)
|
|
"Delete all :children and :buttons in WIDGET."
|
|
(mapcar 'widget-delete (widget-get widget :children))
|
|
(widget-put widget :children nil)
|
|
(mapcar 'widget-delete (widget-get widget :buttons))
|
|
(widget-put widget :buttons nil))
|
|
|
|
(defun widget-types-convert-widget (widget)
|
|
"Convert :args as widget types in WIDGET."
|
|
(widget-put widget :args (mapcar 'widget-convert (widget-get widget :args)))
|
|
widget)
|
|
|
|
;;; The `default' Widget.
|
|
|
|
(define-widget 'default nil
|
|
"Basic widget other widgets are derived from."
|
|
:value-to-internal (lambda (widget value) value)
|
|
:value-to-external (lambda (widget value) value)
|
|
:create 'widget-default-create
|
|
:indent nil
|
|
:offset 0
|
|
:format-handler 'widget-default-format-handler
|
|
:button-face-get 'widget-default-button-face-get
|
|
:sample-face-get 'widget-default-sample-face-get
|
|
:delete 'widget-default-delete
|
|
:value-set 'widget-default-value-set
|
|
:value-inline 'widget-default-value-inline
|
|
:menu-tag-get 'widget-default-menu-tag-get
|
|
:validate (lambda (widget) nil)
|
|
:active 'widget-default-active
|
|
:activate 'widget-specify-active
|
|
:deactivate 'widget-default-deactivate
|
|
:action 'widget-default-action
|
|
:notify 'widget-default-notify)
|
|
|
|
(defun widget-default-create (widget)
|
|
"Create WIDGET at point in the current buffer."
|
|
(widget-specify-insert
|
|
(let ((from (point))
|
|
(tag (widget-get widget :tag))
|
|
(glyph (widget-get widget :tag-glyph))
|
|
(doc (widget-get widget :doc))
|
|
button-begin button-end
|
|
sample-begin sample-end
|
|
doc-begin doc-end
|
|
value-pos)
|
|
(insert (widget-get widget :format))
|
|
(goto-char from)
|
|
;; Parse escapes in format.
|
|
(while (re-search-forward "%\\(.\\)" nil t)
|
|
(let ((escape (aref (match-string 1) 0)))
|
|
(replace-match "" t t)
|
|
(cond ((eq escape ?%)
|
|
(insert "%"))
|
|
((eq escape ?\[)
|
|
(setq button-begin (point)))
|
|
((eq escape ?\])
|
|
(setq button-end (point)))
|
|
((eq escape ?\{)
|
|
(setq sample-begin (point)))
|
|
((eq escape ?\})
|
|
(setq sample-end (point)))
|
|
((eq escape ?n)
|
|
(when (widget-get widget :indent)
|
|
(insert "\n")
|
|
(insert-char ? (widget-get widget :indent))))
|
|
((eq escape ?t)
|
|
(cond (glyph
|
|
(widget-glyph-insert widget (or tag "image") glyph))
|
|
(tag
|
|
(insert tag))
|
|
(t
|
|
(let ((standard-output (current-buffer)))
|
|
(princ (widget-get widget :value))))))
|
|
((eq escape ?d)
|
|
(when doc
|
|
(setq doc-begin (point))
|
|
(insert doc)
|
|
(while (eq (preceding-char) ?\n)
|
|
(delete-backward-char 1))
|
|
(insert "\n")
|
|
(setq doc-end (point))))
|
|
((eq escape ?v)
|
|
(if (and button-begin (not button-end))
|
|
(widget-apply widget :value-create)
|
|
(setq value-pos (point))))
|
|
(t
|
|
(widget-apply widget :format-handler escape)))))
|
|
;; Specify button, sample, and doc, and insert value.
|
|
(and button-begin button-end
|
|
(widget-specify-button widget button-begin button-end))
|
|
(and sample-begin sample-end
|
|
(widget-specify-sample widget sample-begin sample-end))
|
|
(and doc-begin doc-end
|
|
(widget-specify-doc widget doc-begin doc-end))
|
|
(when value-pos
|
|
(goto-char value-pos)
|
|
(widget-apply widget :value-create)))
|
|
(let ((from (copy-marker (point-min)))
|
|
(to (copy-marker (point-max))))
|
|
(widget-specify-text from to)
|
|
(set-marker-insertion-type from t)
|
|
(set-marker-insertion-type to nil)
|
|
(widget-put widget :from from)
|
|
(widget-put widget :to to))))
|
|
|
|
(defun widget-default-format-handler (widget escape)
|
|
;; We recognize the %h escape by default.
|
|
(let* ((buttons (widget-get widget :buttons))
|
|
(doc-property (widget-get widget :documentation-property))
|
|
(doc-try (cond ((widget-get widget :doc))
|
|
((symbolp doc-property)
|
|
(documentation-property (widget-get widget :value)
|
|
doc-property))
|
|
(t
|
|
(funcall doc-property (widget-get widget :value)))))
|
|
(doc-text (and (stringp doc-try)
|
|
(> (length doc-try) 1)
|
|
doc-try)))
|
|
(cond ((eq escape ?h)
|
|
(when doc-text
|
|
(and (eq (preceding-char) ?\n)
|
|
(widget-get widget :indent)
|
|
(insert-char ? (widget-get widget :indent)))
|
|
;; The `*' in the beginning is redundant.
|
|
(when (eq (aref doc-text 0) ?*)
|
|
(setq doc-text (substring doc-text 1)))
|
|
;; Get rid of trailing newlines.
|
|
(when (string-match "\n+\\'" doc-text)
|
|
(setq doc-text (substring doc-text 0 (match-beginning 0))))
|
|
(push (if (string-match "\n." doc-text)
|
|
;; Allow multiline doc to be hiden.
|
|
(widget-create-child-and-convert
|
|
widget 'widget-help
|
|
:doc (progn
|
|
(string-match "\\`.*" doc-text)
|
|
(match-string 0 doc-text))
|
|
:widget-doc doc-text
|
|
"?")
|
|
;; A single line is just inserted.
|
|
(widget-create-child-and-convert
|
|
widget 'item :format "%d" :doc doc-text nil))
|
|
buttons)))
|
|
(t
|
|
(error "Unknown escape `%c'" escape)))
|
|
(widget-put widget :buttons buttons)))
|
|
|
|
(defun widget-default-button-face-get (widget)
|
|
;; Use :button-face or widget-button-face
|
|
(or (widget-get widget :button-face) 'widget-button-face))
|
|
|
|
(defun widget-default-sample-face-get (widget)
|
|
;; Use :sample-face.
|
|
(widget-get widget :sample-face))
|
|
|
|
(defun widget-default-delete (widget)
|
|
;; Remove widget from the buffer.
|
|
(let ((from (widget-get widget :from))
|
|
(to (widget-get widget :to))
|
|
(inhibit-read-only t)
|
|
after-change-functions)
|
|
(widget-apply widget :value-delete)
|
|
(when (< from to)
|
|
;; Kludge: this doesn't need to be true for empty formats.
|
|
(delete-region from to))
|
|
(set-marker from nil)
|
|
(set-marker to nil)))
|
|
|
|
(defun widget-default-value-set (widget value)
|
|
;; Recreate widget with new value.
|
|
(save-excursion
|
|
(goto-char (widget-get widget :from))
|
|
(widget-apply widget :delete)
|
|
(widget-put widget :value value)
|
|
(widget-apply widget :create)))
|
|
|
|
(defun widget-default-value-inline (widget)
|
|
;; Wrap value in a list unless it is inline.
|
|
(if (widget-get widget :inline)
|
|
(widget-value widget)
|
|
(list (widget-value widget))))
|
|
|
|
(defun widget-default-menu-tag-get (widget)
|
|
;; Use tag or value for menus.
|
|
(or (widget-get widget :menu-tag)
|
|
(widget-get widget :tag)
|
|
(widget-princ-to-string (widget-get widget :value))))
|
|
|
|
(defun widget-default-active (widget)
|
|
"Return t iff this widget active (user modifiable)."
|
|
(and (not (widget-get widget :inactive))
|
|
(let ((parent (widget-get widget :parent)))
|
|
(or (null parent)
|
|
(widget-apply parent :active)))))
|
|
|
|
(defun widget-default-deactivate (widget)
|
|
"Make WIDGET inactive for user modifications."
|
|
(widget-specify-inactive widget
|
|
(widget-get widget :from)
|
|
(widget-get widget :to)))
|
|
|
|
(defun widget-default-action (widget &optional event)
|
|
;; Notify the parent when a widget change
|
|
(let ((parent (widget-get widget :parent)))
|
|
(when parent
|
|
(widget-apply parent :notify widget event))))
|
|
|
|
(defun widget-default-notify (widget child &optional event)
|
|
;; Pass notification to parent.
|
|
(widget-default-action widget event))
|
|
|
|
;;; The `item' Widget.
|
|
|
|
(define-widget 'item 'default
|
|
"Constant items for inclusion in other widgets."
|
|
:convert-widget 'widget-item-convert-widget
|
|
:value-create 'widget-item-value-create
|
|
:value-delete 'ignore
|
|
:value-get 'widget-item-value-get
|
|
:match 'widget-item-match
|
|
:match-inline 'widget-item-match-inline
|
|
:action 'widget-item-action
|
|
:format "%t\n")
|
|
|
|
(defun widget-item-convert-widget (widget)
|
|
;; Initialize :value from :args in WIDGET.
|
|
(let ((args (widget-get widget :args)))
|
|
(when args
|
|
(widget-put widget :value (widget-apply widget
|
|
:value-to-internal (car args)))
|
|
(widget-put widget :args nil)))
|
|
widget)
|
|
|
|
(defun widget-item-value-create (widget)
|
|
;; Insert the printed representation of the value.
|
|
(let ((standard-output (current-buffer)))
|
|
(princ (widget-get widget :value))))
|
|
|
|
(defun widget-item-match (widget value)
|
|
;; Match if the value is the same.
|
|
(equal (widget-get widget :value) value))
|
|
|
|
(defun widget-item-match-inline (widget values)
|
|
;; Match if the value is the same.
|
|
(let ((value (widget-get widget :value)))
|
|
(and (listp value)
|
|
(<= (length value) (length values))
|
|
(let ((head (subseq values 0 (length value))))
|
|
(and (equal head value)
|
|
(cons head (subseq values (length value))))))))
|
|
|
|
(defun widget-item-action (widget &optional event)
|
|
;; Just notify itself.
|
|
(widget-apply widget :notify widget event))
|
|
|
|
(defun widget-item-value-get (widget)
|
|
;; Items are simple.
|
|
(widget-get widget :value))
|
|
|
|
;;; The `push-button' Widget.
|
|
|
|
(defcustom widget-push-button-gui t
|
|
"If non nil, use GUI push buttons when available."
|
|
:group 'widgets
|
|
:type 'boolean)
|
|
|
|
;; Cache already created GUI objects.
|
|
(defvar widget-push-button-cache nil)
|
|
|
|
(define-widget 'push-button 'item
|
|
"A pushable button."
|
|
:value-create 'widget-push-button-value-create
|
|
:format "%[%v%]")
|
|
|
|
(defun widget-push-button-value-create (widget)
|
|
;; Insert text representing the `on' and `off' states.
|
|
(let* ((tag (or (widget-get widget :tag)
|
|
(widget-get widget :value)))
|
|
(text (concat "[" tag "]"))
|
|
(gui (cdr (assoc tag widget-push-button-cache))))
|
|
(if (and (fboundp 'make-gui-button)
|
|
(fboundp 'make-glyph)
|
|
widget-push-button-gui
|
|
(fboundp 'device-on-window-system-p)
|
|
(device-on-window-system-p)
|
|
(string-match "XEmacs" emacs-version))
|
|
(progn
|
|
(unless gui
|
|
(setq gui (make-gui-button tag 'widget-gui-action widget))
|
|
(push (cons tag gui) widget-push-button-cache))
|
|
(widget-glyph-insert-glyph widget text
|
|
(make-glyph (car (aref gui 1)))))
|
|
(insert text))))
|
|
|
|
(defun widget-gui-action (widget)
|
|
"Apply :action for WIDGET."
|
|
(widget-apply-action widget (this-command-keys)))
|
|
|
|
;;; The `link' Widget.
|
|
|
|
(define-widget 'link 'item
|
|
"An embedded link."
|
|
:help-echo "Follow the link."
|
|
:format "%[_%t_%]")
|
|
|
|
;;; The `info-link' Widget.
|
|
|
|
(define-widget 'info-link 'link
|
|
"A link to an info file."
|
|
:action 'widget-info-link-action)
|
|
|
|
(defun widget-info-link-action (widget &optional event)
|
|
"Open the info node specified by WIDGET."
|
|
(Info-goto-node (widget-value widget)))
|
|
|
|
;;; The `url-link' Widget.
|
|
|
|
(define-widget 'url-link 'link
|
|
"A link to an www page."
|
|
:action 'widget-url-link-action)
|
|
|
|
(defun widget-url-link-action (widget &optional event)
|
|
"Open the url specified by WIDGET."
|
|
(require 'browse-url)
|
|
(funcall browse-url-browser-function (widget-value widget)))
|
|
|
|
;;; The `editable-field' Widget.
|
|
|
|
(define-widget 'editable-field 'default
|
|
"An editable text field."
|
|
:convert-widget 'widget-item-convert-widget
|
|
:keymap widget-field-keymap
|
|
:format "%v"
|
|
:value ""
|
|
:action 'widget-field-action
|
|
:validate 'widget-field-validate
|
|
:valid-regexp ""
|
|
:error "No match"
|
|
:value-create 'widget-field-value-create
|
|
:value-delete 'widget-field-value-delete
|
|
:value-get 'widget-field-value-get
|
|
:match 'widget-field-match)
|
|
|
|
;; History of field minibuffer edits.
|
|
(defvar widget-field-history nil)
|
|
|
|
(defun widget-field-action (widget &optional event)
|
|
;; Edit the value in the minibuffer.
|
|
(let ((tag (widget-apply widget :menu-tag-get))
|
|
(invalid (widget-apply widget :validate)))
|
|
(when invalid
|
|
(error (widget-get invalid :error)))
|
|
(widget-value-set widget
|
|
(widget-apply widget
|
|
:value-to-external
|
|
(read-string (concat tag ": ")
|
|
(widget-apply
|
|
widget
|
|
:value-to-internal
|
|
(widget-value widget))
|
|
'widget-field-history)))
|
|
(widget-apply widget :notify widget event)
|
|
(widget-setup)))
|
|
|
|
(defun widget-field-validate (widget)
|
|
;; Valid if the content matches `:valid-regexp'.
|
|
(save-excursion
|
|
(let ((value (widget-apply widget :value-get))
|
|
(regexp (widget-get widget :valid-regexp)))
|
|
(if (string-match regexp value)
|
|
nil
|
|
widget))))
|
|
|
|
(defun widget-field-value-create (widget)
|
|
;; Create an editable text field.
|
|
(insert " ")
|
|
(let ((size (widget-get widget :size))
|
|
(value (widget-get widget :value))
|
|
(from (point)))
|
|
(insert value)
|
|
(and size
|
|
(< (length value) size)
|
|
(insert-char ?\ (- size (length value))))
|
|
(unless (memq widget widget-field-list)
|
|
(setq widget-field-new (cons widget widget-field-new)))
|
|
(widget-put widget :value-to (copy-marker (point)))
|
|
(set-marker-insertion-type (widget-get widget :value-to) nil)
|
|
(if (null size)
|
|
(insert ?\n)
|
|
(insert ?\ ))
|
|
(widget-put widget :value-from (copy-marker from))
|
|
(set-marker-insertion-type (widget-get widget :value-from) t)))
|
|
|
|
(defun widget-field-value-delete (widget)
|
|
;; Remove the widget from the list of active editing fields.
|
|
(setq widget-field-list (delq widget widget-field-list))
|
|
;; These are nil if the :format string doesn't contain `%v'.
|
|
(when (widget-get widget :value-from)
|
|
(set-marker (widget-get widget :value-from) nil))
|
|
(when (widget-get widget :value-from)
|
|
(set-marker (widget-get widget :value-to) nil)))
|
|
|
|
(defun widget-field-value-get (widget)
|
|
;; Return current text in editing field.
|
|
(let ((from (widget-get widget :value-from))
|
|
(to (widget-get widget :value-to))
|
|
(size (widget-get widget :size))
|
|
(secret (widget-get widget :secret))
|
|
(old (current-buffer)))
|
|
(if (and from to)
|
|
(progn
|
|
(set-buffer (marker-buffer from))
|
|
(setq from (1+ from)
|
|
to (1- to))
|
|
(while (and size
|
|
(not (zerop size))
|
|
(> to from)
|
|
(eq (char-after (1- to)) ?\ ))
|
|
(setq to (1- to)))
|
|
(let ((result (buffer-substring-no-properties from to)))
|
|
(when secret
|
|
(let ((index 0))
|
|
(while (< (+ from index) to)
|
|
(aset result index
|
|
(get-text-property (+ from index) 'secret))
|
|
(setq index (1+ index)))))
|
|
(set-buffer old)
|
|
result))
|
|
(widget-get widget :value))))
|
|
|
|
(defun widget-field-match (widget value)
|
|
;; Match any string.
|
|
(stringp value))
|
|
|
|
;;; The `text' Widget.
|
|
|
|
(define-widget 'text 'editable-field
|
|
:keymap widget-text-keymap
|
|
"A multiline text area.")
|
|
|
|
;;; The `menu-choice' Widget.
|
|
|
|
(define-widget 'menu-choice 'default
|
|
"A menu of options."
|
|
:convert-widget 'widget-types-convert-widget
|
|
:format "%[%t%]: %v"
|
|
:case-fold t
|
|
:tag "choice"
|
|
:void '(item :format "invalid (%t)\n")
|
|
:value-create 'widget-choice-value-create
|
|
:value-delete 'widget-children-value-delete
|
|
:value-get 'widget-choice-value-get
|
|
:value-inline 'widget-choice-value-inline
|
|
:action 'widget-choice-action
|
|
:error "Make a choice"
|
|
:validate 'widget-choice-validate
|
|
:match 'widget-choice-match
|
|
:match-inline 'widget-choice-match-inline)
|
|
|
|
(defun widget-choice-value-create (widget)
|
|
;; Insert the first choice that matches the value.
|
|
(let ((value (widget-get widget :value))
|
|
(args (widget-get widget :args))
|
|
current)
|
|
(while args
|
|
(setq current (car args)
|
|
args (cdr args))
|
|
(when (widget-apply current :match value)
|
|
(widget-put widget :children (list (widget-create-child-value
|
|
widget current value)))
|
|
(widget-put widget :choice current)
|
|
(setq args nil
|
|
current nil)))
|
|
(when current
|
|
(let ((void (widget-get widget :void)))
|
|
(widget-put widget :children (list (widget-create-child-and-convert
|
|
widget void :value value)))
|
|
(widget-put widget :choice void)))))
|
|
|
|
(defun widget-choice-value-get (widget)
|
|
;; Get value of the child widget.
|
|
(widget-value (car (widget-get widget :children))))
|
|
|
|
(defun widget-choice-value-inline (widget)
|
|
;; Get value of the child widget.
|
|
(widget-apply (car (widget-get widget :children)) :value-inline))
|
|
|
|
(defun widget-choice-action (widget &optional event)
|
|
;; Make a choice.
|
|
(let ((args (widget-get widget :args))
|
|
(old (widget-get widget :choice))
|
|
(tag (widget-apply widget :menu-tag-get))
|
|
(completion-ignore-case (widget-get widget :case-fold))
|
|
current choices)
|
|
;; Remember old value.
|
|
(if (and old (not (widget-apply widget :validate)))
|
|
(let* ((external (widget-value widget))
|
|
(internal (widget-apply old :value-to-internal external)))
|
|
(widget-put old :value internal)))
|
|
;; Find new choice.
|
|
(setq current
|
|
(cond ((= (length args) 0)
|
|
nil)
|
|
((= (length args) 1)
|
|
(nth 0 args))
|
|
((and (= (length args) 2)
|
|
(memq old args))
|
|
(if (eq old (nth 0 args))
|
|
(nth 1 args)
|
|
(nth 0 args)))
|
|
(t
|
|
(while args
|
|
(setq current (car args)
|
|
args (cdr args))
|
|
(setq choices
|
|
(cons (cons (widget-apply current :menu-tag-get)
|
|
current)
|
|
choices)))
|
|
(widget-choose tag (reverse choices) event))))
|
|
(when current
|
|
(widget-value-set widget
|
|
(widget-apply current :value-to-external
|
|
(widget-get current :value)))
|
|
(widget-apply widget :notify widget event)
|
|
(widget-setup)))
|
|
;; Notify parent.
|
|
(widget-apply widget :notify widget event)
|
|
(widget-clear-undo))
|
|
|
|
(defun widget-choice-validate (widget)
|
|
;; Valid if we have made a valid choice.
|
|
(let ((void (widget-get widget :void))
|
|
(choice (widget-get widget :choice))
|
|
(child (car (widget-get widget :children))))
|
|
(if (eq void choice)
|
|
widget
|
|
(widget-apply child :validate))))
|
|
|
|
(defun widget-choice-match (widget value)
|
|
;; Matches if one of the choices matches.
|
|
(let ((args (widget-get widget :args))
|
|
current found)
|
|
(while (and args (not found))
|
|
(setq current (car args)
|
|
args (cdr args)
|
|
found (widget-apply current :match value)))
|
|
found))
|
|
|
|
(defun widget-choice-match-inline (widget values)
|
|
;; Matches if one of the choices matches.
|
|
(let ((args (widget-get widget :args))
|
|
current found)
|
|
(while (and args (null found))
|
|
(setq current (car args)
|
|
args (cdr args)
|
|
found (widget-match-inline current values)))
|
|
found))
|
|
|
|
;;; The `toggle' Widget.
|
|
|
|
(define-widget 'toggle 'item
|
|
"Toggle between two states."
|
|
:format "%[%v%]\n"
|
|
:value-create 'widget-toggle-value-create
|
|
:action 'widget-toggle-action
|
|
:match (lambda (widget value) t)
|
|
:on "on"
|
|
:off "off")
|
|
|
|
(defun widget-toggle-value-create (widget)
|
|
;; Insert text representing the `on' and `off' states.
|
|
(if (widget-value widget)
|
|
(widget-glyph-insert widget
|
|
(widget-get widget :on)
|
|
(widget-get widget :on-glyph))
|
|
(widget-glyph-insert widget
|
|
(widget-get widget :off)
|
|
(widget-get widget :off-glyph))))
|
|
|
|
(defun widget-toggle-action (widget &optional event)
|
|
;; Toggle value.
|
|
(widget-value-set widget (not (widget-value widget)))
|
|
(widget-apply widget :notify widget event))
|
|
|
|
;;; The `checkbox' Widget.
|
|
|
|
(define-widget 'checkbox 'toggle
|
|
"A checkbox toggle."
|
|
:format "%[%v%]"
|
|
:on "[X]"
|
|
:on-glyph "check1"
|
|
:off "[ ]"
|
|
:off-glyph "check0"
|
|
:action 'widget-checkbox-action)
|
|
|
|
(defun widget-checkbox-action (widget &optional event)
|
|
"Toggle checkbox, notify parent, and set active state of sibling."
|
|
(widget-toggle-action widget event)
|
|
(let ((sibling (widget-get-sibling widget)))
|
|
(when sibling
|
|
(if (widget-value widget)
|
|
(widget-apply sibling :activate)
|
|
(widget-apply sibling :deactivate)))))
|
|
|
|
;;; The `checklist' Widget.
|
|
|
|
(define-widget 'checklist 'default
|
|
"A multiple choice widget."
|
|
:convert-widget 'widget-types-convert-widget
|
|
:format "%v"
|
|
:offset 4
|
|
:entry-format "%b %v"
|
|
:menu-tag "checklist"
|
|
:greedy nil
|
|
:value-create 'widget-checklist-value-create
|
|
:value-delete 'widget-children-value-delete
|
|
:value-get 'widget-checklist-value-get
|
|
:validate 'widget-checklist-validate
|
|
:match 'widget-checklist-match
|
|
:match-inline 'widget-checklist-match-inline)
|
|
|
|
(defun widget-checklist-value-create (widget)
|
|
;; Insert all values
|
|
(let ((alist (widget-checklist-match-find widget (widget-get widget :value)))
|
|
(args (widget-get widget :args)))
|
|
(while args
|
|
(widget-checklist-add-item widget (car args) (assq (car args) alist))
|
|
(setq args (cdr args)))
|
|
(widget-put widget :children (nreverse (widget-get widget :children)))))
|
|
|
|
(defun widget-checklist-add-item (widget type chosen)
|
|
;; Create checklist item in WIDGET of type TYPE.
|
|
;; If the item is checked, CHOSEN is a cons whose cdr is the value.
|
|
(and (eq (preceding-char) ?\n)
|
|
(widget-get widget :indent)
|
|
(insert-char ? (widget-get widget :indent)))
|
|
(widget-specify-insert
|
|
(let* ((children (widget-get widget :children))
|
|
(buttons (widget-get widget :buttons))
|
|
(button-args (or (widget-get type :sibling-args)
|
|
(widget-get widget :button-args)))
|
|
(from (point))
|
|
child button)
|
|
(insert (widget-get widget :entry-format))
|
|
(goto-char from)
|
|
;; Parse % escapes in format.
|
|
(while (re-search-forward "%\\([bv%]\\)" nil t)
|
|
(let ((escape (aref (match-string 1) 0)))
|
|
(replace-match "" t t)
|
|
(cond ((eq escape ?%)
|
|
(insert "%"))
|
|
((eq escape ?b)
|
|
(setq button (apply 'widget-create-child-and-convert
|
|
widget 'checkbox
|
|
:value (not (null chosen))
|
|
button-args)))
|
|
((eq escape ?v)
|
|
(setq child
|
|
(cond ((not chosen)
|
|
(let ((child (widget-create-child widget type)))
|
|
(widget-apply child :deactivate)
|
|
child))
|
|
((widget-get type :inline)
|
|
(widget-create-child-value
|
|
widget type (cdr chosen)))
|
|
(t
|
|
(widget-create-child-value
|
|
widget type (car (cdr chosen)))))))
|
|
(t
|
|
(error "Unknown escape `%c'" escape)))))
|
|
;; Update properties.
|
|
(and button child (widget-put child :button button))
|
|
(and button (widget-put widget :buttons (cons button buttons)))
|
|
(and child (widget-put widget :children (cons child children))))))
|
|
|
|
(defun widget-checklist-match (widget values)
|
|
;; All values must match a type in the checklist.
|
|
(and (listp values)
|
|
(null (cdr (widget-checklist-match-inline widget values)))))
|
|
|
|
(defun widget-checklist-match-inline (widget values)
|
|
;; Find the values which match a type in the checklist.
|
|
(let ((greedy (widget-get widget :greedy))
|
|
(args (copy-list (widget-get widget :args)))
|
|
found rest)
|
|
(while values
|
|
(let ((answer (widget-checklist-match-up args values)))
|
|
(cond (answer
|
|
(let ((vals (widget-match-inline answer values)))
|
|
(setq found (append found (car vals))
|
|
values (cdr vals)
|
|
args (delq answer args))))
|
|
(greedy
|
|
(setq rest (append rest (list (car values)))
|
|
values (cdr values)))
|
|
(t
|
|
(setq rest (append rest values)
|
|
values nil)))))
|
|
(cons found rest)))
|
|
|
|
(defun widget-checklist-match-find (widget vals)
|
|
;; Find the vals which match a type in the checklist.
|
|
;; Return an alist of (TYPE MATCH).
|
|
(let ((greedy (widget-get widget :greedy))
|
|
(args (copy-list (widget-get widget :args)))
|
|
found)
|
|
(while vals
|
|
(let ((answer (widget-checklist-match-up args vals)))
|
|
(cond (answer
|
|
(let ((match (widget-match-inline answer vals)))
|
|
(setq found (cons (cons answer (car match)) found)
|
|
vals (cdr match)
|
|
args (delq answer args))))
|
|
(greedy
|
|
(setq vals (cdr vals)))
|
|
(t
|
|
(setq vals nil)))))
|
|
found))
|
|
|
|
(defun widget-checklist-match-up (args vals)
|
|
;; Rerturn the first type from ARGS that matches VALS.
|
|
(let (current found)
|
|
(while (and args (null found))
|
|
(setq current (car args)
|
|
args (cdr args)
|
|
found (widget-match-inline current vals)))
|
|
(if found
|
|
current
|
|
nil)))
|
|
|
|
(defun widget-checklist-value-get (widget)
|
|
;; The values of all selected items.
|
|
(let ((children (widget-get widget :children))
|
|
child result)
|
|
(while children
|
|
(setq child (car children)
|
|
children (cdr children))
|
|
(if (widget-value (widget-get child :button))
|
|
(setq result (append result (widget-apply child :value-inline)))))
|
|
result))
|
|
|
|
(defun widget-checklist-validate (widget)
|
|
;; Ticked chilren must be valid.
|
|
(let ((children (widget-get widget :children))
|
|
child button found)
|
|
(while (and children (not found))
|
|
(setq child (car children)
|
|
children (cdr children)
|
|
button (widget-get child :button)
|
|
found (and (widget-value button)
|
|
(widget-apply child :validate))))
|
|
found))
|
|
|
|
;;; The `option' Widget
|
|
|
|
(define-widget 'option 'checklist
|
|
"An widget with an optional item."
|
|
:inline t)
|
|
|
|
;;; The `choice-item' Widget.
|
|
|
|
(define-widget 'choice-item 'item
|
|
"Button items that delegate action events to their parents."
|
|
:action 'widget-choice-item-action
|
|
:format "%[%t%] \n")
|
|
|
|
(defun widget-choice-item-action (widget &optional event)
|
|
;; Tell parent what happened.
|
|
(widget-apply (widget-get widget :parent) :action event))
|
|
|
|
;;; The `radio-button' Widget.
|
|
|
|
(define-widget 'radio-button 'toggle
|
|
"A radio button for use in the `radio' widget."
|
|
:notify 'widget-radio-button-notify
|
|
:format "%[%v%]"
|
|
:on "(*)"
|
|
:on-glyph "radio1"
|
|
:off "( )"
|
|
:off-glyph "radio0")
|
|
|
|
(defun widget-radio-button-notify (widget child &optional event)
|
|
;; Tell daddy.
|
|
(widget-apply (widget-get widget :parent) :action widget event))
|
|
|
|
;;; The `radio-button-choice' Widget.
|
|
|
|
(define-widget 'radio-button-choice 'default
|
|
"Select one of multiple options."
|
|
:convert-widget 'widget-types-convert-widget
|
|
:offset 4
|
|
:format "%v"
|
|
:entry-format "%b %v"
|
|
:menu-tag "radio"
|
|
:value-create 'widget-radio-value-create
|
|
:value-delete 'widget-children-value-delete
|
|
:value-get 'widget-radio-value-get
|
|
:value-inline 'widget-radio-value-inline
|
|
:value-set 'widget-radio-value-set
|
|
:error "You must push one of the buttons"
|
|
:validate 'widget-radio-validate
|
|
:match 'widget-choice-match
|
|
:match-inline 'widget-choice-match-inline
|
|
:action 'widget-radio-action)
|
|
|
|
(defun widget-radio-value-create (widget)
|
|
;; Insert all values
|
|
(let ((args (widget-get widget :args))
|
|
arg)
|
|
(while args
|
|
(setq arg (car args)
|
|
args (cdr args))
|
|
(widget-radio-add-item widget arg))))
|
|
|
|
(defun widget-radio-add-item (widget type)
|
|
"Add to radio widget WIDGET a new radio button item of type TYPE."
|
|
;; (setq type (widget-convert type))
|
|
(and (eq (preceding-char) ?\n)
|
|
(widget-get widget :indent)
|
|
(insert-char ? (widget-get widget :indent)))
|
|
(widget-specify-insert
|
|
(let* ((value (widget-get widget :value))
|
|
(children (widget-get widget :children))
|
|
(buttons (widget-get widget :buttons))
|
|
(button-args (or (widget-get type :sibling-args)
|
|
(widget-get widget :button-args)))
|
|
(from (point))
|
|
(chosen (and (null (widget-get widget :choice))
|
|
(widget-apply type :match value)))
|
|
child button)
|
|
(insert (widget-get widget :entry-format))
|
|
(goto-char from)
|
|
;; Parse % escapes in format.
|
|
(while (re-search-forward "%\\([bv%]\\)" nil t)
|
|
(let ((escape (aref (match-string 1) 0)))
|
|
(replace-match "" t t)
|
|
(cond ((eq escape ?%)
|
|
(insert "%"))
|
|
((eq escape ?b)
|
|
(setq button (apply 'widget-create-child-and-convert
|
|
widget 'radio-button
|
|
:value (not (null chosen))
|
|
button-args)))
|
|
((eq escape ?v)
|
|
(setq child (if chosen
|
|
(widget-create-child-value
|
|
widget type value)
|
|
(widget-create-child widget type)))
|
|
(unless chosen
|
|
(widget-apply child :deactivate)))
|
|
(t
|
|
(error "Unknown escape `%c'" escape)))))
|
|
;; Update properties.
|
|
(when chosen
|
|
(widget-put widget :choice type))
|
|
(when button
|
|
(widget-put child :button button)
|
|
(widget-put widget :buttons (nconc buttons (list button))))
|
|
(when child
|
|
(widget-put widget :children (nconc children (list child))))
|
|
child)))
|
|
|
|
(defun widget-radio-value-get (widget)
|
|
;; Get value of the child widget.
|
|
(let ((chosen (widget-radio-chosen widget)))
|
|
(and chosen (widget-value chosen))))
|
|
|
|
(defun widget-radio-chosen (widget)
|
|
"Return the widget representing the chosen radio button."
|
|
(let ((children (widget-get widget :children))
|
|
current found)
|
|
(while children
|
|
(setq current (car children)
|
|
children (cdr children))
|
|
(let* ((button (widget-get current :button))
|
|
(value (widget-apply button :value-get)))
|
|
(when value
|
|
(setq found current
|
|
children nil))))
|
|
found))
|
|
|
|
(defun widget-radio-value-inline (widget)
|
|
;; Get value of the child widget.
|
|
(let ((children (widget-get widget :children))
|
|
current found)
|
|
(while children
|
|
(setq current (car children)
|
|
children (cdr children))
|
|
(let* ((button (widget-get current :button))
|
|
(value (widget-apply button :value-get)))
|
|
(when value
|
|
(setq found (widget-apply current :value-inline)
|
|
children nil))))
|
|
found))
|
|
|
|
(defun widget-radio-value-set (widget value)
|
|
;; We can't just delete and recreate a radio widget, since children
|
|
;; can be added after the original creation and won't be recreated
|
|
;; by `:create'.
|
|
(let ((children (widget-get widget :children))
|
|
current found)
|
|
(while children
|
|
(setq current (car children)
|
|
children (cdr children))
|
|
(let* ((button (widget-get current :button))
|
|
(match (and (not found)
|
|
(widget-apply current :match value))))
|
|
(widget-value-set button match)
|
|
(if match
|
|
(progn
|
|
(widget-value-set current value)
|
|
(widget-apply current :activate))
|
|
(widget-apply current :deactivate))
|
|
(setq found (or found match))))))
|
|
|
|
(defun widget-radio-validate (widget)
|
|
;; Valid if we have made a valid choice.
|
|
(let ((children (widget-get widget :children))
|
|
current found button)
|
|
(while (and children (not found))
|
|
(setq current (car children)
|
|
children (cdr children)
|
|
button (widget-get current :button)
|
|
found (widget-apply button :value-get)))
|
|
(if found
|
|
(widget-apply current :validate)
|
|
widget)))
|
|
|
|
(defun widget-radio-action (widget child event)
|
|
;; Check if a radio button was pressed.
|
|
(let ((children (widget-get widget :children))
|
|
(buttons (widget-get widget :buttons))
|
|
current)
|
|
(when (memq child buttons)
|
|
(while children
|
|
(setq current (car children)
|
|
children (cdr children))
|
|
(let* ((button (widget-get current :button)))
|
|
(cond ((eq child button)
|
|
(widget-value-set button t)
|
|
(widget-apply current :activate))
|
|
((widget-value button)
|
|
(widget-value-set button nil)
|
|
(widget-apply current :deactivate)))))))
|
|
;; Pass notification to parent.
|
|
(widget-apply widget :notify child event))
|
|
|
|
;;; The `insert-button' Widget.
|
|
|
|
(define-widget 'insert-button 'push-button
|
|
"An insert button for the `editable-list' widget."
|
|
:tag "INS"
|
|
:help-echo "Insert a new item into the list at this position."
|
|
:action 'widget-insert-button-action)
|
|
|
|
(defun widget-insert-button-action (widget &optional event)
|
|
;; Ask the parent to insert a new item.
|
|
(widget-apply (widget-get widget :parent)
|
|
:insert-before (widget-get widget :widget)))
|
|
|
|
;;; The `delete-button' Widget.
|
|
|
|
(define-widget 'delete-button 'push-button
|
|
"A delete button for the `editable-list' widget."
|
|
:tag "DEL"
|
|
:help-echo "Delete this item from the list."
|
|
:action 'widget-delete-button-action)
|
|
|
|
(defun widget-delete-button-action (widget &optional event)
|
|
;; Ask the parent to insert a new item.
|
|
(widget-apply (widget-get widget :parent)
|
|
:delete-at (widget-get widget :widget)))
|
|
|
|
;;; The `editable-list' Widget.
|
|
|
|
(defcustom widget-editable-list-gui nil
|
|
"If non nil, use GUI push-buttons in editable list when available."
|
|
:type 'boolean
|
|
:group 'widgets)
|
|
|
|
(define-widget 'editable-list 'default
|
|
"A variable list of widgets of the same type."
|
|
:convert-widget 'widget-types-convert-widget
|
|
:offset 12
|
|
:format "%v%i\n"
|
|
:format-handler 'widget-editable-list-format-handler
|
|
:entry-format "%i %d %v"
|
|
:menu-tag "editable-list"
|
|
:value-create 'widget-editable-list-value-create
|
|
:value-delete 'widget-children-value-delete
|
|
:value-get 'widget-editable-list-value-get
|
|
:validate 'widget-editable-list-validate
|
|
:match 'widget-editable-list-match
|
|
:match-inline 'widget-editable-list-match-inline
|
|
:insert-before 'widget-editable-list-insert-before
|
|
:delete-at 'widget-editable-list-delete-at)
|
|
|
|
(defun widget-editable-list-format-handler (widget escape)
|
|
;; We recognize the insert button.
|
|
(let ((widget-push-button-gui widget-editable-list-gui))
|
|
(cond ((eq escape ?i)
|
|
(and (widget-get widget :indent)
|
|
(insert-char ? (widget-get widget :indent)))
|
|
(apply 'widget-create-child-and-convert
|
|
widget 'insert-button
|
|
(widget-get widget :append-button-args)))
|
|
(t
|
|
(widget-default-format-handler widget escape)))))
|
|
|
|
(defun widget-editable-list-value-create (widget)
|
|
;; Insert all values
|
|
(let* ((value (widget-get widget :value))
|
|
(type (nth 0 (widget-get widget :args)))
|
|
(inlinep (widget-get type :inline))
|
|
children)
|
|
(widget-put widget :value-pos (copy-marker (point)))
|
|
(set-marker-insertion-type (widget-get widget :value-pos) t)
|
|
(while value
|
|
(let ((answer (widget-match-inline type value)))
|
|
(if answer
|
|
(setq children (cons (widget-editable-list-entry-create
|
|
widget
|
|
(if inlinep
|
|
(car answer)
|
|
(car (car answer)))
|
|
t)
|
|
children)
|
|
value (cdr answer))
|
|
(setq value nil))))
|
|
(widget-put widget :children (nreverse children))))
|
|
|
|
(defun widget-editable-list-value-get (widget)
|
|
;; Get value of the child widget.
|
|
(apply 'append (mapcar (lambda (child) (widget-apply child :value-inline))
|
|
(widget-get widget :children))))
|
|
|
|
(defun widget-editable-list-validate (widget)
|
|
;; All the chilren must be valid.
|
|
(let ((children (widget-get widget :children))
|
|
child found)
|
|
(while (and children (not found))
|
|
(setq child (car children)
|
|
children (cdr children)
|
|
found (widget-apply child :validate)))
|
|
found))
|
|
|
|
(defun widget-editable-list-match (widget value)
|
|
;; Value must be a list and all the members must match the type.
|
|
(and (listp value)
|
|
(null (cdr (widget-editable-list-match-inline widget value)))))
|
|
|
|
(defun widget-editable-list-match-inline (widget value)
|
|
(let ((type (nth 0 (widget-get widget :args)))
|
|
(ok t)
|
|
found)
|
|
(while (and value ok)
|
|
(let ((answer (widget-match-inline type value)))
|
|
(if answer
|
|
(setq found (append found (car answer))
|
|
value (cdr answer))
|
|
(setq ok nil))))
|
|
(cons found value)))
|
|
|
|
(defun widget-editable-list-insert-before (widget before)
|
|
;; Insert a new child in the list of children.
|
|
(save-excursion
|
|
(let ((children (widget-get widget :children))
|
|
(inhibit-read-only t)
|
|
after-change-functions)
|
|
(cond (before
|
|
(goto-char (widget-get before :entry-from)))
|
|
(t
|
|
(goto-char (widget-get widget :value-pos))))
|
|
(let ((child (widget-editable-list-entry-create
|
|
widget nil nil)))
|
|
(when (< (widget-get child :entry-from) (widget-get widget :from))
|
|
(set-marker (widget-get widget :from)
|
|
(widget-get child :entry-from)))
|
|
(widget-specify-text (widget-get child :entry-from)
|
|
(widget-get child :entry-to))
|
|
(if (eq (car children) before)
|
|
(widget-put widget :children (cons child children))
|
|
(while (not (eq (car (cdr children)) before))
|
|
(setq children (cdr children)))
|
|
(setcdr children (cons child (cdr children)))))))
|
|
(widget-setup)
|
|
widget (widget-apply widget :notify widget))
|
|
|
|
(defun widget-editable-list-delete-at (widget child)
|
|
;; Delete child from list of children.
|
|
(save-excursion
|
|
(let ((buttons (copy-list (widget-get widget :buttons)))
|
|
button
|
|
(inhibit-read-only t)
|
|
after-change-functions)
|
|
(while buttons
|
|
(setq button (car buttons)
|
|
buttons (cdr buttons))
|
|
(when (eq (widget-get button :widget) child)
|
|
(widget-put widget
|
|
:buttons (delq button (widget-get widget :buttons)))
|
|
(widget-delete button))))
|
|
(let ((entry-from (widget-get child :entry-from))
|
|
(entry-to (widget-get child :entry-to))
|
|
(inhibit-read-only t)
|
|
after-change-functions)
|
|
(widget-delete child)
|
|
(delete-region entry-from entry-to)
|
|
(set-marker entry-from nil)
|
|
(set-marker entry-to nil))
|
|
(widget-put widget :children (delq child (widget-get widget :children))))
|
|
(widget-setup)
|
|
(widget-apply widget :notify widget))
|
|
|
|
(defun widget-editable-list-entry-create (widget value conv)
|
|
;; Create a new entry to the list.
|
|
(let ((type (nth 0 (widget-get widget :args)))
|
|
(widget-push-button-gui widget-editable-list-gui)
|
|
child delete insert)
|
|
(widget-specify-insert
|
|
(save-excursion
|
|
(and (widget-get widget :indent)
|
|
(insert-char ? (widget-get widget :indent)))
|
|
(insert (widget-get widget :entry-format)))
|
|
;; Parse % escapes in format.
|
|
(while (re-search-forward "%\\(.\\)" nil t)
|
|
(let ((escape (aref (match-string 1) 0)))
|
|
(replace-match "" t t)
|
|
(cond ((eq escape ?%)
|
|
(insert "%"))
|
|
((eq escape ?i)
|
|
(setq insert (apply 'widget-create-child-and-convert
|
|
widget 'insert-button
|
|
(widget-get widget :insert-button-args))))
|
|
((eq escape ?d)
|
|
(setq delete (apply 'widget-create-child-and-convert
|
|
widget 'delete-button
|
|
(widget-get widget :delete-button-args))))
|
|
((eq escape ?v)
|
|
(if conv
|
|
(setq child (widget-create-child-value
|
|
widget type value))
|
|
(setq child (widget-create-child widget type))))
|
|
(t
|
|
(error "Unknown escape `%c'" escape)))))
|
|
(widget-put widget
|
|
:buttons (cons delete
|
|
(cons insert
|
|
(widget-get widget :buttons))))
|
|
(let ((entry-from (copy-marker (point-min)))
|
|
(entry-to (copy-marker (point-max))))
|
|
(widget-specify-text entry-from entry-to)
|
|
(set-marker-insertion-type entry-from t)
|
|
(set-marker-insertion-type entry-to nil)
|
|
(widget-put child :entry-from entry-from)
|
|
(widget-put child :entry-to entry-to)))
|
|
(widget-put insert :widget child)
|
|
(widget-put delete :widget child)
|
|
child))
|
|
|
|
;;; The `group' Widget.
|
|
|
|
(define-widget 'group 'default
|
|
"A widget which group other widgets inside."
|
|
:convert-widget 'widget-types-convert-widget
|
|
:format "%v"
|
|
:value-create 'widget-group-value-create
|
|
:value-delete 'widget-children-value-delete
|
|
:value-get 'widget-editable-list-value-get
|
|
:validate 'widget-editable-list-validate
|
|
:match 'widget-group-match
|
|
:match-inline 'widget-group-match-inline)
|
|
|
|
(defun widget-group-value-create (widget)
|
|
;; Create each component.
|
|
(let ((args (widget-get widget :args))
|
|
(value (widget-get widget :value))
|
|
arg answer children)
|
|
(while args
|
|
(setq arg (car args)
|
|
args (cdr args)
|
|
answer (widget-match-inline arg value)
|
|
value (cdr answer))
|
|
(and (eq (preceding-char) ?\n)
|
|
(widget-get widget :indent)
|
|
(insert-char ? (widget-get widget :indent)))
|
|
(push (cond ((null answer)
|
|
(widget-create-child widget arg))
|
|
((widget-get arg :inline)
|
|
(widget-create-child-value widget arg (car answer)))
|
|
(t
|
|
(widget-create-child-value widget arg (car (car answer)))))
|
|
children))
|
|
(widget-put widget :children (nreverse children))))
|
|
|
|
(defun widget-group-match (widget values)
|
|
;; Match if the components match.
|
|
(and (listp values)
|
|
(let ((match (widget-group-match-inline widget values)))
|
|
(and match (null (cdr match))))))
|
|
|
|
(defun widget-group-match-inline (widget vals)
|
|
;; Match if the components match.
|
|
(let ((args (widget-get widget :args))
|
|
argument answer found)
|
|
(while args
|
|
(setq argument (car args)
|
|
args (cdr args)
|
|
answer (widget-match-inline argument vals))
|
|
(if answer
|
|
(setq vals (cdr answer)
|
|
found (append found (car answer)))
|
|
(setq vals nil
|
|
args nil)))
|
|
(if answer
|
|
(cons found vals)
|
|
nil)))
|
|
|
|
;;; The `widget-help' Widget.
|
|
|
|
(define-widget 'widget-help 'push-button
|
|
"The widget documentation button."
|
|
:format "%[[%t]%] %d"
|
|
:help-echo "Toggle display of documentation."
|
|
:action 'widget-help-action)
|
|
|
|
(defun widget-help-action (widget &optional event)
|
|
"Toggle documentation for WIDGET."
|
|
(let ((old (widget-get widget :doc))
|
|
(new (widget-get widget :widget-doc)))
|
|
(widget-put widget :doc new)
|
|
(widget-put widget :widget-doc old))
|
|
(widget-value-set widget (widget-value widget)))
|
|
|
|
;;; The Sexp Widgets.
|
|
|
|
(define-widget 'const 'item
|
|
"An immutable sexp."
|
|
:format "%t\n%d")
|
|
|
|
(define-widget 'function-item 'item
|
|
"An immutable function name."
|
|
:format "%v\n%h"
|
|
:documentation-property (lambda (symbol)
|
|
(condition-case nil
|
|
(documentation symbol t)
|
|
(error nil))))
|
|
|
|
(define-widget 'variable-item 'item
|
|
"An immutable variable name."
|
|
:format "%v\n%h"
|
|
:documentation-property 'variable-documentation)
|
|
|
|
(define-widget 'string 'editable-field
|
|
"A string"
|
|
:tag "String"
|
|
:format "%[%t%]: %v")
|
|
|
|
(define-widget 'regexp 'string
|
|
"A regular expression."
|
|
;; Should do validation.
|
|
:tag "Regexp")
|
|
|
|
(define-widget 'file 'string
|
|
"A file widget.
|
|
It will read a file name from the minibuffer when activated."
|
|
:format "%[%t%]: %v"
|
|
:tag "File"
|
|
:action 'widget-file-action)
|
|
|
|
(defun widget-file-action (widget &optional event)
|
|
;; Read a file name from the minibuffer.
|
|
(let* ((value (widget-value widget))
|
|
(dir (file-name-directory value))
|
|
(file (file-name-nondirectory value))
|
|
(menu-tag (widget-apply widget :menu-tag-get))
|
|
(must-match (widget-get widget :must-match))
|
|
(answer (read-file-name (concat menu-tag ": (default `" value "') ")
|
|
dir nil must-match file)))
|
|
(widget-value-set widget (abbreviate-file-name answer))
|
|
(widget-apply widget :notify widget event)
|
|
(widget-setup)))
|
|
|
|
(define-widget 'directory 'file
|
|
"A directory widget.
|
|
It will read a directory name from the minibuffer when activated."
|
|
:tag "Directory")
|
|
|
|
(define-widget 'symbol 'string
|
|
"A lisp symbol."
|
|
:value nil
|
|
:tag "Symbol"
|
|
:match (lambda (widget value) (symbolp value))
|
|
:value-to-internal (lambda (widget value)
|
|
(if (symbolp value)
|
|
(symbol-name value)
|
|
value))
|
|
:value-to-external (lambda (widget value)
|
|
(if (stringp value)
|
|
(intern value)
|
|
value)))
|
|
|
|
(define-widget 'function 'sexp
|
|
;; Should complete on functions.
|
|
"A lisp function."
|
|
:tag "Function")
|
|
|
|
(define-widget 'variable 'symbol
|
|
;; Should complete on variables.
|
|
"A lisp variable."
|
|
:tag "Variable")
|
|
|
|
(define-widget 'sexp 'string
|
|
"An arbitrary lisp expression."
|
|
:tag "Lisp expression"
|
|
:value nil
|
|
:validate 'widget-sexp-validate
|
|
:match (lambda (widget value) t)
|
|
:value-to-internal 'widget-sexp-value-to-internal
|
|
:value-to-external (lambda (widget value) (read value)))
|
|
|
|
(defun widget-sexp-value-to-internal (widget value)
|
|
;; Use pp for printer representation.
|
|
(let ((pp (pp-to-string value)))
|
|
(while (string-match "\n\\'" pp)
|
|
(setq pp (substring pp 0 -1)))
|
|
(if (or (string-match "\n\\'" pp)
|
|
(> (length pp) 40))
|
|
(concat "\n" pp)
|
|
pp)))
|
|
|
|
(defun widget-sexp-validate (widget)
|
|
;; Valid if we can read the string and there is no junk left after it.
|
|
(save-excursion
|
|
(let ((buffer (set-buffer (get-buffer-create " *Widget Scratch*"))))
|
|
(erase-buffer)
|
|
(insert (widget-apply widget :value-get))
|
|
(goto-char (point-min))
|
|
(condition-case data
|
|
(let ((value (read buffer)))
|
|
(if (eobp)
|
|
(if (widget-apply widget :match value)
|
|
nil
|
|
(widget-put widget :error (widget-get widget :type-error))
|
|
widget)
|
|
(widget-put widget
|
|
:error (format "Junk at end of expression: %s"
|
|
(buffer-substring (point)
|
|
(point-max))))
|
|
widget))
|
|
(error (widget-put widget :error (error-message-string data))
|
|
widget)))))
|
|
|
|
(define-widget 'integer 'sexp
|
|
"An integer."
|
|
:tag "Integer"
|
|
:value 0
|
|
:type-error "This field should contain an integer"
|
|
:value-to-internal (lambda (widget value)
|
|
(if (integerp value)
|
|
(prin1-to-string value)
|
|
value))
|
|
:match (lambda (widget value) (integerp value)))
|
|
|
|
(define-widget 'character 'string
|
|
"An character."
|
|
:tag "Character"
|
|
:value 0
|
|
:size 1
|
|
:format "%{%t%}: %v\n"
|
|
:type-error "This field should contain a character"
|
|
:value-to-internal (lambda (widget value)
|
|
(if (integerp value)
|
|
(char-to-string value)
|
|
value))
|
|
:value-to-external (lambda (widget value)
|
|
(if (stringp value)
|
|
(aref value 0)
|
|
value))
|
|
:match (lambda (widget value) (integerp value)))
|
|
|
|
(define-widget 'number 'sexp
|
|
"A floating point number."
|
|
:tag "Number"
|
|
:value 0.0
|
|
:type-error "This field should contain a number"
|
|
:value-to-internal (lambda (widget value)
|
|
(if (numberp value)
|
|
(prin1-to-string value)
|
|
value))
|
|
:match (lambda (widget value) (numberp value)))
|
|
|
|
(define-widget 'list 'group
|
|
"A lisp list."
|
|
:tag "List"
|
|
:format "%{%t%}:\n%v")
|
|
|
|
(define-widget 'vector 'group
|
|
"A lisp vector."
|
|
:tag "Vector"
|
|
:format "%{%t%}:\n%v"
|
|
:match 'widget-vector-match
|
|
:value-to-internal (lambda (widget value) (append value nil))
|
|
:value-to-external (lambda (widget value) (apply 'vector value)))
|
|
|
|
(defun widget-vector-match (widget value)
|
|
(and (vectorp value)
|
|
(widget-group-match widget
|
|
(widget-apply :value-to-internal widget value))))
|
|
|
|
(define-widget 'cons 'group
|
|
"A cons-cell."
|
|
:tag "Cons-cell"
|
|
:format "%{%t%}:\n%v"
|
|
:match 'widget-cons-match
|
|
:value-to-internal (lambda (widget value)
|
|
(list (car value) (cdr value)))
|
|
:value-to-external (lambda (widget value)
|
|
(cons (nth 0 value) (nth 1 value))))
|
|
|
|
(defun widget-cons-match (widget value)
|
|
(and (consp value)
|
|
(widget-group-match widget
|
|
(widget-apply widget :value-to-internal value))))
|
|
|
|
(define-widget 'choice 'menu-choice
|
|
"A union of several sexp types."
|
|
:tag "Choice"
|
|
:format "%[%t%]: %v")
|
|
|
|
(define-widget 'radio 'radio-button-choice
|
|
"A union of several sexp types."
|
|
:tag "Choice"
|
|
:format "%{%t%}:\n%v")
|
|
|
|
(define-widget 'repeat 'editable-list
|
|
"A variable length homogeneous list."
|
|
:tag "Repeat"
|
|
:format "%{%t%}:\n%v%i\n")
|
|
|
|
(define-widget 'set 'checklist
|
|
"A list of members from a fixed set."
|
|
:tag "Set"
|
|
:format "%{%t%}:\n%v")
|
|
|
|
(define-widget 'boolean 'toggle
|
|
"To be nil or non-nil, that is the question."
|
|
:tag "Boolean"
|
|
:format "%{%t%}: %[%v%]\n")
|
|
|
|
;;; The `color' Widget.
|
|
|
|
(define-widget 'color-item 'choice-item
|
|
"A color name (with sample)."
|
|
:format "%v (%{sample%})\n"
|
|
:sample-face-get 'widget-color-item-button-face-get)
|
|
|
|
(defun widget-color-item-button-face-get (widget)
|
|
;; We create a face from the value.
|
|
(require 'facemenu)
|
|
(condition-case nil
|
|
(facemenu-get-face (intern (concat "fg:" (widget-value widget))))
|
|
(error 'default)))
|
|
|
|
(define-widget 'color 'push-button
|
|
"Choose a color name (with sample)."
|
|
:format "%[%t%]: %v"
|
|
:tag "Color"
|
|
:value "black"
|
|
:value-create 'widget-color-value-create
|
|
:value-delete 'widget-children-value-delete
|
|
:value-get 'widget-color-value-get
|
|
:value-set 'widget-color-value-set
|
|
:action 'widget-color-action
|
|
:match 'widget-field-match
|
|
:tag "Color")
|
|
|
|
(defvar widget-color-choice-list nil)
|
|
;; Variable holding the possible colors.
|
|
|
|
(defun widget-color-choice-list ()
|
|
(unless widget-color-choice-list
|
|
(setq widget-color-choice-list
|
|
(mapcar '(lambda (color) (list color))
|
|
(x-defined-colors))))
|
|
widget-color-choice-list)
|
|
|
|
(defun widget-color-value-create (widget)
|
|
(let ((child (widget-create-child-and-convert
|
|
widget 'color-item (widget-get widget :value))))
|
|
(widget-put widget :children (list child))))
|
|
|
|
(defun widget-color-value-get (widget)
|
|
;; Pass command to first child.
|
|
(widget-apply (car (widget-get widget :children)) :value-get))
|
|
|
|
(defun widget-color-value-set (widget value)
|
|
;; Pass command to first child.
|
|
(widget-apply (car (widget-get widget :children)) :value-set value))
|
|
|
|
(defvar widget-color-history nil
|
|
"History of entered colors")
|
|
|
|
(defun widget-color-action (widget &optional event)
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;; Prompt for a color.
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(let* ((tag (widget-apply widget :menu-tag-get))
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(prompt (concat tag ": "))
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(answer (cond ((string-match "XEmacs" emacs-version)
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(read-color prompt))
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|
((fboundp 'x-defined-colors)
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|
(completing-read (concat tag ": ")
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|
(widget-color-choice-list)
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nil nil nil 'widget-color-history))
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(t
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(read-string prompt (widget-value widget))))))
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|
(unless (zerop (length answer))
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(widget-value-set widget answer)
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(widget-apply widget :notify widget event)
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|
(widget-setup))))
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|
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;;; The Help Echo
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|
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(defun widget-echo-help-mouse ()
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|
"Display the help message for the widget under the mouse.
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|
Enable with (run-with-idle-timer 1 t 'widget-echo-help-mouse)"
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|
(let* ((pos (mouse-position))
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|
(frame (car pos))
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|
(x (car (cdr pos)))
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|
(y (cdr (cdr pos)))
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|
(win (window-at x y frame))
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|
(where (coordinates-in-window-p (cons x y) win)))
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|
(when (consp where)
|
|
(save-window-excursion
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|
(progn ; save-excursion
|
|
(select-window win)
|
|
(let* ((result (compute-motion (window-start win)
|
|
'(0 . 0)
|
|
(window-end win)
|
|
where
|
|
(window-width win)
|
|
(cons (window-hscroll) 0)
|
|
win)))
|
|
(when (and (eq (nth 1 result) x)
|
|
(eq (nth 2 result) y))
|
|
(widget-echo-help (nth 0 result))))))))
|
|
(unless track-mouse
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|
(setq track-mouse t)
|
|
(add-hook 'post-command-hook 'widget-stop-mouse-tracking)))
|
|
|
|
(defun widget-stop-mouse-tracking (&rest args)
|
|
"Stop the mouse tracking done while idle."
|
|
(remove-hook 'post-command-hook 'widget-stop-mouse-tracking)
|
|
(setq track-mouse nil))
|
|
|
|
(defun widget-at (pos)
|
|
"The button or field at POS."
|
|
(or (get-text-property pos 'button)
|
|
(get-text-property pos 'field)))
|
|
|
|
(defun widget-echo-help (pos)
|
|
"Display the help echo for widget at POS."
|
|
(let* ((widget (widget-at pos))
|
|
(help-echo (and widget (widget-get widget :help-echo))))
|
|
(cond ((stringp help-echo)
|
|
(message "%s" help-echo))
|
|
((and (symbolp help-echo) (fboundp help-echo)
|
|
(stringp (setq help-echo (funcall help-echo widget))))
|
|
(message "%s" help-echo)))))
|
|
|
|
;;; The End:
|
|
|
|
(provide 'wid-edit)
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|
|
|
;; wid-edit.el ends here
|