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mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-11-27 07:37:33 +00:00

(describe-text-at and stuff): Moved to descr-text.el.

This commit is contained in:
Richard M. Stallman 2002-04-30 04:59:24 +00:00
parent bd421bc2dd
commit 641c04b9f0

View File

@ -461,164 +461,6 @@ These special properties include `invisible', `intangible' and `read-only'."
(remove-text-properties
start end '(invisible nil intangible nil read-only nil))))
;;; Describe-Text Mode.
(defun describe-text-done ()
"Delete the current window or bury the current buffer."
(interactive)
(if (> (count-windows) 1)
(delete-window)
(bury-buffer)))
(defvar describe-text-mode-map
(let ((map (make-sparse-keymap)))
(set-keymap-parent map widget-keymap)
map)
"Keymap for `describe-text-mode'.")
(defcustom describe-text-mode-hook nil
"List of hook functions ran by `describe-text-mode'."
:type 'hook)
(defun describe-text-mode ()
"Major mode for buffers created by `describe-text-at'.
\\{describe-text-mode-map}
Entry to this mode calls the value of `describe-text-mode-hook'
if that value is non-nil."
(kill-all-local-variables)
(setq major-mode 'describe-text-mode
mode-name "Describe-Text")
(use-local-map describe-text-mode-map)
(widget-setup)
(run-hooks 'describe-text-mode-hook))
;;; Describe-Text Utilities.
(defun describe-text-widget (widget)
"Insert text to describe WIDGET in the current buffer."
(widget-create 'link
:notify `(lambda (&rest ignore)
(widget-browse ',widget))
(format "%S" (if (symbolp widget)
widget
(car widget))))
(widget-insert " ")
(widget-create 'info-link :tag "widget" "(widget)Top"))
(defun describe-text-sexp (sexp)
"Insert a short description of SEXP in the current buffer."
(let ((pp (condition-case signal
(pp-to-string sexp)
(error (prin1-to-string signal)))))
(when (string-match "\n\\'" pp)
(setq pp (substring pp 0 (1- (length pp)))))
(if (cond ((string-match "\n" pp)
nil)
((> (length pp) (- (window-width) (current-column)))
nil)
(t t))
(widget-insert pp)
(widget-create 'push-button
:tag "show"
:action (lambda (widget &optional event)
(with-output-to-temp-buffer
"*Pp Eval Output*"
(princ (widget-get widget :value))))
pp))))
(defun describe-text-properties (properties)
"Insert a description of PROPERTIES in the current buffer.
PROPERTIES should be a list of overlay or text properties.
The `category' property is made into a widget button that call
`describe-text-category' when pushed."
(while properties
(widget-insert (format " %-20s " (car properties)))
(let ((key (nth 0 properties))
(value (nth 1 properties)))
(cond ((eq key 'category)
(widget-create 'link
:notify `(lambda (&rest ignore)
(describe-text-category ',value))
(format "%S" value)))
((widgetp value)
(describe-text-widget value))
(t
(describe-text-sexp value))))
(widget-insert "\n")
(setq properties (cdr (cdr properties)))))
;;; Describe-Text Commands.
(defun describe-text-category (category)
"Describe a text property category."
(interactive "S")
(when (get-buffer "*Text Category*")
(kill-buffer "*Text Category*"))
(save-excursion
(with-output-to-temp-buffer "*Text Category*"
(set-buffer "*Text Category*")
(widget-insert "Category " (format "%S" category) ":\n\n")
(describe-text-properties (symbol-plist category))
(describe-text-mode)
(goto-char (point-min)))))
;;;###autoload
(defun describe-text-at (pos)
"Describe widgets, buttons, overlays and text properties at POS."
(interactive "d")
(when (eq (current-buffer) (get-buffer "*Text Description*"))
(error "Can't do self inspection"))
(let* ((properties (text-properties-at pos))
(overlays (overlays-at pos))
overlay
(wid-field (get-char-property pos 'field))
(wid-button (get-char-property pos 'button))
(wid-doc (get-char-property pos 'widget-doc))
;; If button.el is not loaded, we have no buttons in the text.
(button (and (fboundp 'button-at) (button-at pos)))
(button-type (and button (button-type button)))
(button-label (and button (button-label button)))
(widget (or wid-field wid-button wid-doc)))
(if (not (or properties overlays))
(message "This is plain text.")
(when (get-buffer "*Text Description*")
(kill-buffer "*Text Description*"))
(save-excursion
(with-output-to-temp-buffer "*Text Description*"
(set-buffer "*Text Description*")
(widget-insert "Text content at position " (format "%d" pos) ":\n\n")
;; Widgets
(when (widgetp widget)
(widget-insert (cond (wid-field "This is an editable text area")
(wid-button "This is an active area")
(wid-doc "This is documentation text")))
(widget-insert " of a ")
(describe-text-widget widget)
(widget-insert ".\n\n"))
;; Buttons
(when (and button (not (widgetp wid-button)))
(widget-insert "Here is a " (format "%S" button-type)
" button labeled `" button-label "'.\n\n"))
;; Overlays
(when overlays
(if (eq (length overlays) 1)
(widget-insert "There is an overlay here:\n")
(widget-insert "There are " (format "%d" (length overlays))
" overlays here:\n"))
(dolist (overlay overlays)
(widget-insert " From " (format "%d" (overlay-start overlay))
" to " (format "%d" (overlay-end overlay)) "\n")
(describe-text-properties (overlay-properties overlay)))
(widget-insert "\n"))
;; Text properties
(when properties
(widget-insert "There are text properties here:\n")
(describe-text-properties properties))
(describe-text-mode)
(goto-char (point-min)))))))
;;;###autoload
(defun facemenu-read-color (&optional prompt)
"Read a color using the minibuffer."