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anything-show-completion.el
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;;; anything-show-completion.el --- Show selection in buffer for anything completion
;; $Id: anything-show-completion.el,v 1.19 2009/11/19 20:16:51 rubikitch Exp rubikitch $
;; Copyright (C) 2009 hchbaw
;; Copyright (C) 2009 rubikitch
;; Original Author: hchbaw
;; Author: rubikitch <[email protected]>
;; Keywords: anything, convenience, complete
;; URL: http://www.emacswiki.org/cgi-bin/wiki/download/anything-show-completion.el
;; This file is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; This file is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;
;; `anything' is also useful for in-buffer completion such as
;; `anything-lisp-complete-symbol'. But users must see *anything*
;; buffer when completing. It forces us to move our eyes away from
;; code temporarily and we feel stressful.
;;
;; With this plug-in, current selection (`anything-get-selection') is
;; displayed at point. This plug-in is automatically detected by user
;; program such as anything-complete.el .
;;
;; This program is based on an idea by hchbaw.
;; http://d.hatena.ne.jp/hchbaw/20090416/1239878984
;;; Commands:
;;
;; Below are complete command list:
;;
;;
;;; Customizable Options:
;;
;; Below are customizable option list:
;;
;; `anything-show-completion-face'
;; *Face of anything-show-completion.
;; default = anything-selection-face
;; `anything-show-completion-activate'
;; *Set nil to turn off anything-show-completion.
;; default = t
;; `anything-show-completion-minimum-window-height'
;; *Minimum completion window height.
;; default = 7
;;; For developers:
;;
;; To enable anything-show-completion for user-defined function, use
;; `use-anything-show-completion'. It accepts function and length of
;; prefix (= current completing target) as a sexp. It must be used
;; with soft-require.
;;
;; Example:
;; (when (require 'anything-show-completion nil t)
;; (use-anything-show-completion 'rct-complete-symbol--anything
;; '(length pattern)))
;;
;; Example in souce code:
;; http://www.emacswiki.org/cgi-bin/wiki/download/anything-complete.el
;; http://www.emacswiki.org/cgi-bin/wiki/download/anything-rcodetools.el
;;; Installation:
;;
;; Put anything-show-completion.el to your load-path.
;; The load-path is usually ~/elisp/.
;; It's set in your ~/.emacs like this:
;; (add-to-list 'load-path (expand-file-name "~/elisp"))
;;
;; And the following to your ~/.emacs startup file.
;;
;; (require 'anything-show-completion)
;;
;; No need more.
;;; Customize:
;;
;;
;; All of the above can customize by:
;; M-x customize-group RET anything-show-completion RET
;;
;;; History:
;; $Log: anything-show-completion.el,v $
;; Revision 1.19 2009/11/19 20:16:51 rubikitch
;; asc-display-function: Fix an error "Window height XX too small (after splitting)"
;;
;; Revision 1.18 2009/11/19 17:27:59 rubikitch
;; asc-display-function: Take into account the beginning of line
;;
;; Revision 1.17 2009/11/11 17:43:34 rubikitch
;; Display bug fix. thanks to hchbaw
;;
;; http://d.hatena.ne.jp/hchbaw/20091111/1257960247
;;
;; Revision 1.16 2009/10/09 17:05:41 rubikitch
;; asc-display-function: Fix an error when opening from minibuffer
;;
;; Revision 1.15 2009/10/08 17:04:04 rubikitch
;; Fix an error when window height is too small.
;;
;; Revision 1.14 2009/10/08 16:57:57 rubikitch
;; added comments
;;
;; Revision 1.13 2009/10/08 10:56:03 rubikitch
;; Fix an error when completion window is too small.
;;
;; Revision 1.12 2009/10/08 10:24:37 rubikitch
;; Show candidates under the point.
;;
;; Revision 1.11 2009/10/08 05:12:56 rubikitch
;; Candidates are shown near the point.
;;
;; Revision 1.10 2009/10/06 22:46:23 rubikitch
;; `asc-display-function': Emacs23 fix
;;
;; Revision 1.9 2009/05/03 22:01:32 rubikitch
;; asc-display-function: split-window hack is effective only if one window is displayed.
;;
;; Revision 1.8 2009/05/03 21:47:41 rubikitch
;; set `anything-display-function'
;;
;; Revision 1.7 2009/04/20 12:21:28 rubikitch
;; Fixed an error when `anything' is invoked for the first time.
;;
;; Revision 1.6 2009/04/18 16:11:33 rubikitch
;; Removed a mess
;;
;; Revision 1.5 2009/04/18 16:11:01 rubikitch
;; * Fixed a typo.
;; * New function: `anything-show-completion-install'
;;
;; Revision 1.4 2009/04/18 10:05:15 rubikitch
;; copyright
;;
;; Revision 1.3 2009/04/18 10:02:10 rubikitch
;; doc
;;
;; Revision 1.2 2009/04/18 09:21:14 rubikitch
;; `use-anything-show-completion' as a function.
;; It enables us to affect multiple commands with `dolist'.
;;
;; Revision 1.1 2009/04/17 17:07:35 rubikitch
;; Initial revision
;;
;;; Code:
(defvar anything-show-completion-version "$Id: anything-show-completion.el,v 1.19 2009/11/19 20:16:51 rubikitch Exp rubikitch $")
(require 'anything)
(defgroup anything-show-completion nil
"anything-show-completion"
:group 'anything)
(defvar asc-overlay nil)
(defcustom anything-show-completion-face anything-selection-face
"*Face of anything-show-completion."
:type 'face
:group 'anything-show-completion)
(defcustom anything-show-completion-activate t
"*Set nil to turn off anything-show-completion."
:type 'boolean
:group 'anything-show-completion)
(defcustom anything-show-completion-minimum-window-height 7
"*Minimum completion window height."
:type 'integer
:group 'anything-show-completion)
(defun asc-initialize-maybe ()
(unless asc-overlay
(setq asc-overlay (make-overlay (point-min) (point-min)))
(overlay-put asc-overlay 'face anything-show-completion-face)
(asc-cleanup)))
(defun asc-cleanup ()
(delete-overlay asc-overlay))
(add-hook 'anything-cleanup-hook 'asc-cleanup)
(asc-initialize-maybe)
(defun asc-overlay-activate-p ()
"Return non-nil if `anything' is being used for any completionic purposes."
(and anything-show-completion-activate (overlay-buffer asc-overlay)))
(defadvice anything-mark-current-line (after anything-show-completion activate)
"Display the `anything-get-selection' contents as an overlay at the
current (point)."
(anything-aif (and (asc-overlay-activate-p)
(with-anything-window
(not (equal (anything-buffer-get) anything-action-buffer)))
(anything-get-selection))
(with-current-buffer anything-current-buffer
(asc-display-overlay it))))
(defun asc-display-overlay (selection)
(overlay-put asc-overlay 'display selection)
(move-overlay asc-overlay
(- (point) (eval (overlay-get asc-overlay 'prefix-length-sexp)))
(point)
anything-current-buffer))
;;; Entry point
(defun use-anything-show-completion (function prefix-length-sexp)
"Setup a before advice of FUNCTION to show the `anything-get-selection' contents as an overlay at point.
PREFIX-LENGTH-SEXP is an expression to denote the length of prefix (completing target).
It is evaluated in `asc-display-overlay'."
(eval `(defadvice ,function (around anything-show-completion activate)
(anything-show-completion-install ',prefix-length-sexp)
(let ((anything-display-function 'asc-display-function)) ad-do-it))))
(defun anything-show-completion-install (prefix-length-sexp)
(asc-initialize-maybe)
(move-overlay asc-overlay (point) (point) (current-buffer))
(overlay-put asc-overlay 'prefix-length-sexp prefix-length-sexp))
(defun asc-point-at-upper-half-of-window-p (pt)
(<= (+ (count-screen-lines (window-start) pt)
(if header-line-format 1 0)
(if (zerop (current-column)) 0 0))
(- (/ (window-height) 2)
(if header-line-format 1 0))))
;; (global-set-key "\C-x\C-z" (lambda () (interactive) (message "%s" (asc-point-at-upper-half-of-window-p (point)))))
(defun asc-display-function (buf)
(let* ((cursor-upper-p (asc-point-at-upper-half-of-window-p (point)))
(half (/ (window-height) 2))
(win (selected-window))
(upper-height (max window-min-height
(min (+ 1 ; mode-line
(if header-line-format 1 0) ;header-line
;; window screen lines
(count-screen-lines (window-start) (point))
;; adjustment of count-screen-lines and BOL
(if (bolp) 1 0))
(- (window-height) anything-show-completion-minimum-window-height))))
(new-w (let ((split-window-keep-point))
(if (active-minibuffer-window)
(minibuffer-selected-window)
(enlarge-window (if (<= (window-height) (+ anything-show-completion-minimum-window-height window-min-height))
(+ 4 anything-show-completion-minimum-window-height)
0))
(split-window (selected-window) upper-height)))))
(with-selected-window win
(recenter -1))
(set-window-buffer new-w buf)))
(provide 'anything-show-completion)
;; (asc-display-function anything-buffer)
;; How to save (DO NOT REMOVE!!)
;; (emacswiki-post "anything-show-completion.el")
;;; anything-show-completion.el ends here