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183 lines
6.4 KiB
183 lines
6.4 KiB
;;; helm-info.el --- Browse info index with helm -*- lexical-binding: t -*-
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;; Copyright (C) 2012 ~ 2015 Thierry Volpiatto <thierry.volpiatto@gmail.com>
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;;; Code:
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(require 'cl-lib)
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(require 'helm)
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(require 'helm-plugin)
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(declare-function Info-index-nodes "info" (&optional file))
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(declare-function Info-goto-node "info" (&optional fork))
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(declare-function Info-find-node "info.el" (filename nodename &optional no-going-back))
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(defvar Info-history)
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(defgroup helm-info nil
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"Info related Applications and libraries for Helm."
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:group 'helm)
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;;; Build info-index sources with `helm-info-source' class.
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;;
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;;
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(cl-defun helm-info-init (&optional (file (helm-attr 'info-file)))
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;; Allow reinit candidate buffer when using edebug.
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(helm-aif (and debug-on-error
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(helm-candidate-buffer))
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(kill-buffer it))
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(unless (helm-candidate-buffer)
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(save-window-excursion
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(info file)
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(let ((tobuf (helm-candidate-buffer 'global))
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(infobuf (current-buffer))
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Info-history
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start end)
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(cl-dolist (node (Info-index-nodes))
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(Info-goto-node node)
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(goto-char (point-min))
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(while (search-forward "\n* " nil t)
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(unless (search-forward "Menu:\n" (1+ (point-at-eol)) t)
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(setq start (point-at-bol)
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end (point-at-eol))
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(with-current-buffer tobuf
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(insert-buffer-substring infobuf start end)
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(insert "\n")))))))))
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(defun helm-info-goto (node-line)
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(Info-goto-node (car node-line))
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(helm-goto-line (cdr node-line)))
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(defun helm-info-display-to-real (line)
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(and (string-match
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;; This regexp is stolen from Info-apropos-matches
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"\\* +\\([^\n]*.+[^\n]*\\):[ \t]+\\([^\n]*\\)\\.\\(?:[ \t\n]*(line +\\([0-9]+\\))\\)?" line)
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(cons (format "(%s)%s" (helm-attr 'info-file) (match-string 2 line))
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(string-to-number (or (match-string 3 line) "1")))))
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(defclass helm-info-source (helm-source-in-buffer)
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((info-file :initarg :info-file
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:initform nil
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:custom 'string)
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(init :initform #'helm-info-init)
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(display-to-real :initform #'helm-info-display-to-real)
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(get-line :initform #'buffer-substring)
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(action :initform '(("Goto node" . helm-info-goto)))))
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(defmacro helm-build-info-source (fname &rest args)
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`(helm-make-source (concat "Info Index: " ,fname) 'helm-info-source
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:info-file ,fname ,@args))
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(defun helm-build-info-index-command (name doc source buffer)
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"Define an helm command NAME with documentation DOC.
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Arg SOURCE will be an existing helm source named
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`helm-source-info-<NAME>' and BUFFER a string buffer name."
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(defalias (intern (concat "helm-info-" name))
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(lambda ()
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(interactive)
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(helm :sources source
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:buffer buffer
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:candidate-number-limit 1000))
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doc))
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(defun helm-define-info-index-sources (var-value &optional commands)
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"Define helm sources named helm-source-info-<NAME>.
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Sources are generated for all entries of `helm-default-info-index-list'.
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If COMMANDS arg is non--nil build also commands named `helm-info<NAME>'.
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Where NAME is one of `helm-default-info-index-list'."
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(cl-loop for str in var-value
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for sym = (intern (concat "helm-source-info-" str))
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do (set sym (helm-build-info-source str))
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when commands
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do (helm-build-info-index-command
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str (format "Predefined helm for %s info." str)
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sym (format "*helm info %s*" str))))
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(defun helm-info-index-set (var value)
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(set var value)
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(helm-define-info-index-sources value t))
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(defcustom helm-default-info-index-list
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'("elisp" "cl" "org" "gnus" "tramp" "ratpoison"
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"zsh" "bash" "coreutils" "fileutils"
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"find" "sh-utils" "textutils" "libc"
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"make" "automake" "autoconf" "eintr"
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"emacs" "elib" "eieio" "gauche-refe" "guile"
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"guile-tut" "goops" "screen" "latex" "gawk"
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"sed" "m4" "wget" "binutils" "as" "bfd" "gprof"
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"ld" "diff" "flex" "grep" "gzip" "libtool"
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"texinfo" "info" "gdb" "stabs" "cvsbook" "cvs"
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"bison" "id-utils" "global")
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"Info Manual entries to use for building helm info index commands."
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:group 'helm-info
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:type '(repeat (choice string))
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:set 'helm-info-index-set)
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(defcustom helm-info-default-sources
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'(helm-source-info-elisp
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helm-source-info-cl
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helm-source-info-eieio
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helm-source-info-pages)
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"The default sources to use in `helm-info-at-point'."
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:group 'helm-info
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:type '(repeat (choice symbol)))
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;;; Info pages
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(defvar helm-info--pages-cache nil
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"Cache for all info pages on system.")
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(defun helm-info-pages-init ()
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"Collect candidates for initial Info node Top."
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(if helm-info--pages-cache
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helm-info--pages-cache
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(let ((info-topic-regexp "\\* +\\([^:]+: ([^)]+)[^.]*\\)\\.")
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topics)
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(require 'info)
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(with-temp-buffer
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(Info-find-node "dir" "top")
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(goto-char (point-min))
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(while (re-search-forward info-topic-regexp nil t)
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(push (match-string-no-properties 1) topics))
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(kill-buffer))
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(setq helm-info--pages-cache topics))))
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(defvar helm-source-info-pages
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(helm-build-sync-source "Info Pages"
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:init #'helm-info-pages-init
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:candidates (lambda () helm-info--pages-cache)
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:action '(("Show with Info" .(lambda (node-str)
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(info (replace-regexp-in-string
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"^[^:]+: " "" node-str)))))
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:requires-pattern 2))
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;;;###autoload
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(defun helm-info-at-point ()
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"Preconfigured `helm' for searching info at point.
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With a prefix-arg insert symbol at point."
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(interactive)
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(helm :sources helm-info-default-sources
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:buffer "*helm info*"))
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(provide 'helm-info)
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;; Local Variables:
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;; byte-compile-warnings: (not cl-functions obsolete)
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;; coding: utf-8
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;; indent-tabs-mode: nil
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;; End:
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;;; helm-info.el ends here
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