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eldoc: modify eldoc-documentation-function' using add-function'

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* lisp/emacs-lisp/eldoc.el (eldoc-documentation-function): Describe how
major modes should use `add-function' to alter value of the variable.

* lisp/hexl.el (hexl-mode): Set `eldoc-documentation-function' using
`add-function' so the default value is always used.
* lisp/ielm.el (inferior-emacs-lisp-mode): Set
`eldoc-documentation-function' using `add-function' so the default
value is always used.
* lisp/progmodes/cfengine.el (cfengine3-mode): Set
`eldoc-documentation-function' using `add-function' so the default
value is always used.
* lisp/progmodes/elisp-mode (emacs-lisp-mode): Set
`eldoc-documentation-function' using `add-function' so the default
value is always used.
* lisp/progmodes/octave.el (octave-mode): Set
`eldoc-documentation-function' using `add-function' so the default
value is always used.
* lisp/progmodes/python.el (python-mode): Set
`eldoc-documentation-function' using `add-function' so the default
value is always used.
* lisp/simple.el (read--expression): Set `eldoc-documentation-function'
using `add-function' so the default value is always used.
This commit is contained in:
Michal Nazarewicz 2014-12-05 19:34:42 +01:00
parent 81681ed9a1
commit fd020a2931
9 changed files with 44 additions and 14 deletions
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23
lisp/ChangeLog
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@ -1,5 +1,28 @@
2015-01-20 Michal Nazarewicz <mina86@mina86.com>
* emacs-lisp/eldoc.el (eldoc-documentation-function): Describe how
major modes should use `add-function' to alter value of the variable.
* hexl.el (hexl-mode): Set `eldoc-documentation-function' using
`add-function' so the default value is always used.
* ielm.el (inferior-emacs-lisp-mode): Set
`eldoc-documentation-function' using `add-function' so the default
value is always used.
* progmodes/cfengine.el (cfengine3-mode): Set
`eldoc-documentation-function' using `add-function' so the default
value is always used.
* progmodes/elisp-mode (emacs-lisp-mode): Set
`eldoc-documentation-function' using `add-function' so the default
value is always used.
* progmodes/octave.el (octave-mode): Set
`eldoc-documentation-function' using `add-function' so the default
value is always used.
* progmodes/python.el (python-mode): Set
`eldoc-documentation-function' using `add-function' so the default
value is always used.
* simple.el (read--expression): Set `eldoc-documentation-function'
using `add-function' so the default value is always used.
* descr-text.el (describe-char-eldoc): New function returning
basic Unicode codepoint information (e.g. name) about character
at point. It is meant to be used as a default value of the

7
lisp/emacs-lisp/eldoc.el
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@ -336,7 +336,12 @@ the variables `eldoc-argument-case' and `eldoc-echo-area-use-multiline-p',
and the face `eldoc-highlight-function-argument', if they are to have any
effect.
This variable is expected to be set buffer-locally by modes that support ElDoc.")
Major modes should modify this variable using `add-function', for example:
(add-function :before-until (local 'eldoc-documentation-function)
#'foo-mode-eldoc-function)
so that the global documentation function (i.e. the default value of the
variable) is taken into account if the major mode specific function does not
return any documentation.")
(defun eldoc-print-current-symbol-info ()
;; This is run from post-command-hook or some idle timer thing,

4
lisp/hexl.el
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@ -395,8 +395,8 @@ You can use \\[hexl-find-file] to visit a file in Hexl mode.
(add-hook 'change-major-mode-hook 'hexl-maybe-dehexlify-buffer nil t)
;; Set a callback function for eldoc.
(hexl-mode--setq-local 'eldoc-documentation-function
#'hexl-print-current-point-info)
(add-function :before-until (local 'eldoc-documentation-function)
#'hexl-print-current-point-info)
(eldoc-add-command-completions "hexl-")
(eldoc-remove-command "hexl-save-buffer"
"hexl-current-address")

6
lisp/ielm.el
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@ -380,7 +380,7 @@ nonempty, then flushes the buffer."
(*3 ***)
(active-process (ielm-process))
(old-standard-output standard-output)
new-standard-output
new-standard-output
ielm-temp-buffer)
(set-match-data ielm-match-data)
(save-excursion
@ -542,8 +542,8 @@ Customized bindings may be defined in `ielm-map', which currently contains:
(set (make-local-variable 'completion-at-point-functions)
'(comint-replace-by-expanded-history
ielm-complete-filename elisp-completion-at-point))
(setq-local eldoc-documentation-function
#'elisp-eldoc-documentation-function)
(add-function :before-until (local 'eldoc-documentation-function)
#'elisp-eldoc-documentation-function)
(set (make-local-variable 'ielm-prompt-internal) ielm-prompt)
(set (make-local-variable 'comint-prompt-read-only) ielm-prompt-read-only)
(setq comint-get-old-input 'ielm-get-old-input)

3
lisp/progmodes/cfengine.el
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@ -1350,7 +1350,8 @@ to the action header."
(when buffer-file-name
(shell-quote-argument buffer-file-name)))))
(setq-local eldoc-documentation-function #'cfengine3-documentation-function)
(add-function :before-until (local 'eldoc-documentation-function)
#'cfengine3-documentation-function)
(add-hook 'completion-at-point-functions
#'cfengine3-completion-function nil t)

4
lisp/progmodes/elisp-mode.el
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@ -231,8 +231,8 @@ Blank lines separate paragraphs. Semicolons start comments.
(defvar xref-identifier-completion-table-function)
(lisp-mode-variables nil nil 'elisp)
(setq imenu-case-fold-search nil)
(setq-local eldoc-documentation-function
#'elisp-eldoc-documentation-function)
(add-function :before-until (local 'eldoc-documentation-function)
#'elisp-eldoc-documentation-function)
(setq-local xref-find-function #'elisp-xref-find)
(setq-local xref-identifier-completion-table-function
#'elisp--xref-identifier-completion-table)

3
lisp/progmodes/octave.el
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@ -601,7 +601,8 @@ Key bindings:
(add-hook 'before-save-hook 'octave-sync-function-file-names nil t)
(setq-local beginning-of-defun-function 'octave-beginning-of-defun)
(and octave-font-lock-texinfo-comment (octave-font-lock-texinfo-comment))
(setq-local eldoc-documentation-function 'octave-eldoc-function)
(add-function :before-until (local 'eldoc-documentation-function)
'octave-eldoc-function)
(easy-menu-add octave-mode-menu))

4
lisp/progmodes/python.el
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@ -4662,8 +4662,8 @@ Arguments START and END narrow the buffer region to work on."
(current-column))))
(^ '(- (1+ (current-indentation))))))
(set (make-local-variable 'eldoc-documentation-function)
#'python-eldoc-function)
(add-function :before-until (local 'eldoc-documentation-function)
#'python-eldoc-function)
(add-to-list 'hs-special-modes-alist
`(python-mode "^\\s-*\\(?:def\\|class\\)\\>" nil "#"

4
lisp/simple.el
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@ -1407,8 +1407,8 @@ display the result of expression evaluation."
(minibuffer-with-setup-hook
(lambda ()
;; FIXME: call emacs-lisp-mode?
(setq-local eldoc-documentation-function
#'elisp-eldoc-documentation-function)
(add-function :before-until (local 'eldoc-documentation-function)
#'elisp-eldoc-documentation-function)
(add-hook 'completion-at-point-functions
#'elisp-completion-at-point nil t)
(run-hooks 'eval-expression-minibuffer-setup-hook))