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;;; +Info.el -*- lexical-binding: t; -*-
;;Copyright (C) 2022 Case Duckworth
;;; Code:
(require 'info)
(defun +Info-copy-current-node-name (&optional arg)
"Put the name of the current Info invocation intothe kill ring.
This is the same as `Info-copy-current-node-name', but with the
arg reversed."
(interactive "P" Info-mode)
(Info-copy-current-node-name (unless arg 0)))
(defun +Info-modeline-breadcrumbs ()
(let ((nodes (Info-toc-nodes Info-current-file))
(node Info-current-node)
(crumbs ())
(depth Info-breadcrumbs-depth-internal)
(text ""))
;; Get ancestors from the cached parent-children node info
(while (and (not (equal "Top" node)) (> depth 0))
(setq node (nth 1 (assoc node nodes)))
(when node (push node crumbs))
(setq depth (1- depth)))
;; Add bottom node.
(setq crumbs (nconc crumbs (list Info-current-node)))
(when crumbs
;; Add top node (and continuation if needed).
(setq crumbs (cons "Top" (if (member (pop crumbs) '(nil "Top"))
crumbs
(cons nil crumbs))))
(dolist (node crumbs)
(let ((crumbs-map (make-sparse-keymap))
(menu-map (make-sparse-keymap "Breadcrumbs in Mode Line")))
(define-key crumbs-map [mode-line mouse-3] menu-map)
(when node
(define-key menu-map [Info-prev]
`(menu-item "Previous Node" Info-prev
:visible ,(Info-check-pointer "prev[ious]*") :help "Go to the previous node"))
(define-key menu-map [Info-next]
`(menu-item "Next Node" Info-next
:visible ,(Info-check-pointer "next") :help "Go to the next node"))
(define-key menu-map [separator] '("--"))
(define-key menu-map [Info-breadcrumbs-in-mode-line-mode]
`(menu-item "Toggle Breadcrumbs" Info-breadcrumbs-in-mode-line-mode
:help "Toggle displaying breadcrumbs in the Info mode-line"
:button (:toggle . Info-breadcrumbs-in-mode-line-mode)))
(define-key menu-map [Info-set-breadcrumbs-depth]
`(menu-item "Set Breadcrumbs Depth" Info-set-breadcrumbs-depth
:help "Set depth of breadcrumbs to show in the mode-line"))
(setq node (if (equal node Info-current-node)
(propertize
(replace-regexp-in-string "%" "%%" Info-current-node)
'face 'mode-line-buffer-id
'help-echo "mouse-1: Scroll back, mouse-2: Scroll forward, mouse-3: Menu"
'mouse-face 'mode-line-highlight
'local-map
(progn
(define-key crumbs-map [mode-line mouse-1] 'Info-mouse-scroll-down)
(define-key crumbs-map [mode-line mouse-2] 'Info-mouse-scroll-up)
crumbs-map))
(propertize
node
'local-map (progn (define-key crumbs-map [mode-line mouse-1]
`(lambda () (interactive) (Info-goto-node ,node)))
(define-key crumbs-map [mode-line mouse-2]
`(lambda () (interactive) (Info-goto-node ,node)))
crumbs-map)
'mouse-face 'mode-line-highlight
'help-echo "mouse-1, mouse-2: Go to this node; mouse-3: Menu")))))
(let ((nodetext (if (not (equal node "Top"))
node
(concat (format "(%s)" (if (stringp Info-current-file)
(file-name-nondirectory Info-current-file)
;; Some legacy code can still use a symbol.
Info-current-file))
node))))
(setq text (concat text (if (equal node "Top") "" " > ") (if node nodetext "...")))))
text)))
(provide '+Info)
;;; +Info.el ends here
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