diff options
Diffstat (limited to 'lisp/info.el')
| -rw-r--r-- | lisp/info.el | 124 |
1 files changed, 77 insertions, 47 deletions
diff --git a/lisp/info.el b/lisp/info.el index 4c7bb981afc..8408e01efb5 100644 --- a/lisp/info.el +++ b/lisp/info.el @@ -1,6 +1,6 @@ ;; info.el --- info package for Emacs -;; Copyright (C) 1985-1986, 1992-2012 Free Software Foundation, Inc. +;; Copyright (C) 1985-1986, 1992-2013 Free Software Foundation, Inc. ;; Maintainer: FSF ;; Keywords: help @@ -397,6 +397,10 @@ Marker points nowhere if file has no tag table.") (defvar Info-current-file-completions nil "Cached completion list for current Info file.") +(defvar Info-file-completions nil + "Cached completion alist of visited Info files. +Each element of the alist is (FILE . COMPLETIONS)") + (defvar Info-file-supports-index-cookies nil "Non-nil if current Info file supports index cookies.") @@ -742,11 +746,15 @@ in `Info-file-supports-index-cookies-list'." (push dir Info-directory-list))))))) ;;;###autoload -(defun info-other-window (&optional file-or-node) +(defun info-other-window (&optional file-or-node buffer) "Like `info' but show the Info buffer in another window." - (interactive (if current-prefix-arg - (list (read-file-name "Info file name: " nil nil t)))) - (info-setup file-or-node (switch-to-buffer-other-window "*info*"))) + (interactive (list + (if (and current-prefix-arg (not (numberp current-prefix-arg))) + (read-file-name "Info file name: " nil nil t)) + (if (numberp current-prefix-arg) + (format "*info*<%s>" current-prefix-arg)))) + (info-setup file-or-node + (switch-to-buffer-other-window (or buffer "*info*")))) ;;;###autoload (put 'info 'info-file (purecopy "emacs")) ;;;###autoload @@ -763,8 +771,9 @@ with the top-level Info directory. In interactive use, a non-numeric prefix argument directs this command to read a file name from the minibuffer. -A numeric prefix argument selects an Info buffer with the prefix number -appended to the Info buffer name. + +A numeric prefix argument N selects an Info buffer named +\"*info*<%s>\". The search path for Info files is in the variable `Info-directory-list'. The top-level Info directory is made by combining all the files named `dir' @@ -1771,12 +1780,20 @@ See `completing-read' for a description of arguments and usage." (substring string 1) predicate code)) - ;; If a file name was given, then any node is fair game. - ((string-match "\\`(" string) - (cond - ((eq code nil) string) - ((eq code t) nil) - (t t))) + ;; If a file name was given, complete nodes in the file. + ((string-match "\\`(\\([^)]+\\))" string) + (let ((file0 (match-string 0 string)) + (file1 (match-string 1 string)) + (node (substring string (match-end 0)))) + (completion-table-with-context + file0 + (apply-partially + (lambda (string pred action) + (complete-with-action + action + (Info-build-node-completions (Info-find-file file1)) + string pred))) + node predicate code))) ;; Otherwise use Info-read-node-completion-table. (t (complete-with-action code Info-read-node-completion-table string predicate)))) @@ -1793,41 +1810,54 @@ in the current Info file, or \"(FILENAME)NODENAME\"." (Info-read-node-name prompt) nodename))) -(defun Info-build-node-completions () - (or Info-current-file-completions - (let ((compl nil) - ;; Bind this in case the user sets it to nil. - (case-fold-search t) - (node-regexp "Node: *\\([^,\n]*\\) *[,\n\t]")) - (save-excursion - (save-restriction - (or Info-tag-table-marker - (error "No Info tags found")) - (if (marker-buffer Info-tag-table-marker) - (let ((marker Info-tag-table-marker)) - (set-buffer (marker-buffer marker)) - (widen) - (goto-char marker) - (while (re-search-forward "\n\\(Node\\|Ref\\): \\(.*\\)\177" nil t) - (setq compl - (cons (list (match-string-no-properties 2)) - compl)))) +(defun Info-build-node-completions (&optional file) + (if file + (or (cdr (assoc file Info-file-completions)) + (with-temp-buffer + (Info-mode) + (Info-goto-node (format "(%s)Top" file)) + (Info-build-node-completions-1) + (push (cons file Info-current-file-completions) Info-file-completions) + Info-current-file-completions)) + (or Info-current-file-completions + (Info-build-node-completions-1)))) + +(defun Info-build-node-completions-1 () + (let ((compl nil) + ;; Bind this in case the user sets it to nil. + (case-fold-search t) + (node-regexp "Node: *\\([^,\n]*\\) *[,\n\t]")) + (save-excursion + (save-restriction + (or Info-tag-table-marker + (error "No Info tags found")) + (if (marker-buffer Info-tag-table-marker) + (let ((marker Info-tag-table-marker)) + (set-buffer (marker-buffer marker)) (widen) - (goto-char (point-min)) - ;; If the buffer begins with a node header, process that first. - (if (Info-node-at-bob-matching node-regexp) - (setq compl (list (match-string-no-properties 1)))) - ;; Now for the rest of the nodes. - (while (search-forward "\n\^_" nil t) - (forward-line 1) - (let ((beg (point))) - (forward-line 1) - (if (re-search-backward node-regexp beg t) - (setq compl - (cons (list (match-string-no-properties 1)) - compl)))))))) - (setq compl (cons '("*") compl)) - (set (make-local-variable 'Info-current-file-completions) compl)))) + (goto-char marker) + (while (re-search-forward "\n\\(Node\\|Ref\\): \\(.*\\)\177" nil t) + (setq compl + (cons (list (match-string-no-properties 2)) + compl)))) + (widen) + (goto-char (point-min)) + ;; If the buffer begins with a node header, process that first. + (if (Info-node-at-bob-matching node-regexp) + (setq compl (list (match-string-no-properties 1)))) + ;; Now for the rest of the nodes. + (while (search-forward "\n\^_" nil t) + (forward-line 1) + (let ((beg (point))) + (forward-line 1) + (if (re-search-backward node-regexp beg t) + (setq compl + (cons (list (match-string-no-properties 1)) + compl)))))))) + (setq compl (cons '("*") (nreverse compl))) + (set (make-local-variable 'Info-current-file-completions) compl) + compl)) + (defun Info-restore-point (hl) "If this node has been visited, restore the point value when we left." |