From 50ac70af8aeca33b8240f0c6c70b3e7f5a4882bc Mon Sep 17 00:00:00 2001 From: Miles Bader Date: Sun, 17 Sep 2000 16:21:42 +0000 Subject: [PATCH] (Info-fontify-node): Make a few cleanups. Add extra `help-echo' and `local-map' props to node xrefs. Use header-specific faces for node-names & xrefs. (Info-use-header-line, Info-header-line): New variables. (info-header, info-header-xref, info-header-node): New faces. (Info-setup-header-line): New function. (Info-select-node): Call Info-setup-header-line when enabled. (Info-extract-pointer): Work even if the header line is hidden. --- lisp/ChangeLog | 12 +++++++ lisp/info.el | 85 +++++++++++++++++++++++++++++++++++++++----------- 2 files changed, 79 insertions(+), 18 deletions(-) diff --git a/lisp/ChangeLog b/lisp/ChangeLog index d3ca3d3f00a..f8f1059b30e 100644 --- a/lisp/ChangeLog +++ b/lisp/ChangeLog @@ -1,3 +1,15 @@ +2000-09-18 Miles Bader + + * info.el (Info-fontify-node): Make a few cleanups. + Add extra `help-echo' and `local-map' props to node xrefs. + Use header-specific faces for node-names & xrefs. + (Info-use-header-line): New variable. + (info-header, info-header-xref, info-header-node): New faces. + (Info-setup-header-line): New function. + (Info-select-node): Call Info-setup-header-line when enabled. + (Info-extract-pointer): Work even if the header line is hidden. + (Info-header-line): New variable. + 2000-09-16 Stefan Monnier * vms-patch.el (print-region-function): Don't quote lambda. diff --git a/lisp/info.el b/lisp/info.el index cd9f86384bb..dd1a5490e29 100644 --- a/lisp/info.el +++ b/lisp/info.el @@ -83,6 +83,22 @@ The Lisp code is executed when the node is selected.") :type 'integer :group 'info) +(defcustom Info-use-header-line t + "*Non-nil means to put the beginning-of-node links in an emacs header-line. +A header-line does not scroll with the rest of the buffer." + :type 'boolean + :group 'info) + +(defface info-header-xref + '((t (:weight bold))) + "Face for Info cross-references in a node header." + :group 'info) + +(defface info-header-node + '((t (:weight bold :slant italic))) + "Face for Info nodes in a node header." + :group 'info) + (defvar Info-directory-list nil "List of directories to search for Info documentation files. nil means not yet initialized. In this case, Info uses the environment @@ -873,6 +889,9 @@ a case-insensitive match is tried." (if (numberp nodepos) (+ (- nodepos lastfilepos) (point))))) +(defvar Info-header-line nil + "If the info node header is hidden, the text of the header.") + (defun Info-select-node () "Select the info node that point is in. Bind this in case the user sets it to nil." @@ -895,6 +914,7 @@ Bind this in case the user sets it to nil." ;; Find the end of it, and narrow. (beginning-of-line) (let (active-expression) + ;; Narrow to the node contents (narrow-to-region (point) (if (re-search-forward "\n[\^_\f]" nil t) (prog1 @@ -907,6 +927,9 @@ Bind this in case the user sets it to nil." (point-max))) (if Info-enable-active-nodes (eval active-expression)) (if Info-fontify (Info-fontify-node)) + (if Info-use-header-line + (Info-setup-header-line) + (setq Info-header-line nil)) (run-hooks 'Info-selection-hook))))) (defun Info-set-mode-line () @@ -919,6 +942,16 @@ Bind this in case the user sets it to nil." ") " (or Info-current-node "")))) +;; Skip the node header and make it into a header-line. This function +;; should be called when the node is already narrowed. +(defun Info-setup-header-line () + (goto-char (point-min)) + (forward-line 1) + (set (make-local-variable 'Info-header-line) + (buffer-substring (point-min) (1- (point)))) + (setq header-line-format 'Info-header-line) + (narrow-to-region (point) (point-max))) + ;; Go to an info node specified with a filename-and-nodename string ;; of the sort that is found in pointers in nodes. @@ -1101,15 +1134,20 @@ if ERRORNAME is nil, just return nil. Bind this in case the user sets it to nil." (let ((case-fold-search t)) (save-excursion - (goto-char (point-min)) - (forward-line 1) - (if (re-search-backward (concat name ":") nil t) - (progn + (save-restriction + (goto-char (point-min)) + (when Info-header-line + ;; expose the header line in the buffer + (widen) + (forward-line -1)) + (let ((bound (point))) + (forward-line 1) + (cond ((re-search-backward (concat name ":") nil bound) (goto-char (match-end 0)) (Info-following-node-name)) - (if (eq errorname t) - nil - (error "Node has no %s" (capitalize (or errorname name)))))))) + ((not (eq errorname t)) + (error "Node has no %s" + (capitalize (or errorname name)))))))))) (defun Info-following-node-name (&optional allowedchars) "Return the node name in the buffer following point. @@ -2321,18 +2359,29 @@ the variable `Info-file-list-for-emacs'." (goto-char (point-min)) (when (looking-at "^File: [^,: \t]+,?[ \t]+") (goto-char (match-end 0)) - (while - (looking-at "[ \t]*\\([^:, \t\n]+\\):[ \t]+\\([^:,\t\n]+\\),?") + (while (looking-at "[ \t]*\\([^:, \t\n]+\\):[ \t]+\\([^:,\t\n]+\\),?") (goto-char (match-end 0)) - (if (save-excursion - (goto-char (match-beginning 1)) - (save-match-data (looking-at "Node:"))) - (put-text-property (match-beginning 2) (match-end 2) - 'face 'info-node) - (put-text-property (match-beginning 2) (match-end 2) - 'face 'info-xref) - (put-text-property (match-beginning 2) (match-end 2) - 'mouse-face 'highlight)))) + (let* ((nbeg (match-beginning 2)) + (nend (match-end 2)) + (tbeg (match-beginning 1)) + (tag (buffer-substring tbeg (match-end 1)))) + (if (string-equal tag "Node") + (put-text-property nbeg nend 'face 'info-header-node) + (put-text-property nbeg nend 'face 'info-header-xref) + (put-text-property nbeg nend 'mouse-face 'highlight) + (put-text-property tbeg nend + 'help-echo + (concat "Goto node " + (buffer-substring nbeg nend))) + (let ((fun (cdr (assoc tag '(("Prev" . Info-prev) + ("Next" . Info-next) + ("Up" . Info-up)))))) + (when fun + (let ((keymap (make-sparse-keymap))) + (define-key keymap [header-line mouse-1] fun) + (define-key keymap [header-line mouse-2] fun) + (put-text-property tbeg nend 'local-map keymap)))) + )))) (goto-char (point-min)) (while (re-search-forward "\n\\([^ \t\n].+\\)\n\\(\\*+\\|=+\\|-+\\)$" nil t) -- 2.39.2