Commit 7e387c9e authored by Juri Linkov's avatar Juri Linkov

* lisp/man.el (Man-width-max): New defcustom (bug#32536, bug#9385)

(Man-columns): New buffer-local variable.
(Man-columns): New function.
(Man-start-calling): Call Man-columns and set buffer-local Man-columns.
(Man--window-state-change-timer): New internal variable.
(Man--window-state-change): New internal function.
(Man-fit-to-window): New function.
(Man-mode): Add Man--window-state-change to local hook
window-state-change-functions.

* lisp/image-mode.el (image-fit-to-window): Add window arg to
window-buffer call.
parent 97f24412
Pipeline #4268 failed with stage
in 65 minutes and 5 seconds
......@@ -1268,6 +1268,8 @@ them to the 'browse-url' function, like the other protocols: 'ftp',
'http', and 'https'. This allows to have references to local HTML
files, for example.
*** 'Man-width-max' (80 by default) limits the number of columns on man pages.
** Xref
+++
......
......@@ -870,7 +870,7 @@ Otherwise, display the image by calling `image-mode'."
(defun image-fit-to-window (window)
"Adjust size of image to display it exactly in WINDOW boundaries."
(when (window-live-p window)
(with-current-buffer (window-buffer)
(with-current-buffer (window-buffer window)
(when (derived-mode-p 'image-mode)
(let ((spec (image-get-display-property)))
(when (eq (car-safe spec) 'image)
......
......@@ -182,6 +182,18 @@ The value also can be a positive integer for a fixed width."
(integer :tag "Fixed width" :value 65))
:group 'man)
(defcustom Man-width-max 80
"Maximum number of columns allowed for the width of manual pages.
It defines the maximum width for the case when `Man-width' is customized
to a dynamically calculated value depending on the frame/window width.
If the width calculated for `Man-width' is larger than the maximum width,
it will be automatically reduced to the width defined by this variable.
When nil, there is no limit on maximum width."
:type '(choice (const :tag "No limit" nil)
(integer :tag "Max width" :value 80))
:version "27.1"
:group 'man)
(defcustom Man-frame-parameters nil
"Frame parameter list for creating a new frame for a manual page."
:type '(repeat (cons :format "%v"
......@@ -1022,6 +1034,22 @@ names or descriptions. The pattern argument is usually an
(error "No item under point")
(man man-args)))
(defvar Man-columns nil)
(defun Man-columns ()
(let ((width (cond
((and (integerp Man-width) (> Man-width 0))
Man-width)
(Man-width
(let ((window (get-buffer-window nil t)))
(frame-width (and window (window-frame window)))))
(t
(window-width (get-buffer-window nil t))))))
(when (and (integerp Man-width-max)
(> Man-width-max 0))
(setq width (min width Man-width-max)))
width))
(defmacro Man-start-calling (&rest body)
"Start the man command in `body' after setting up the environment."
`(let ((process-environment (copy-sequence process-environment))
......@@ -1058,20 +1086,8 @@ names or descriptions. The pattern argument is usually an
(not (or (getenv "MANWIDTH") (getenv "COLUMNS"))))
;; Since the page buffer is displayed beforehand,
;; we can select its window and get the window/frame width.
(setenv "COLUMNS" (number-to-string
(cond
((and (integerp Man-width) (> Man-width 0))
Man-width)
(Man-width
(if (window-live-p (get-buffer-window (current-buffer) t))
(with-selected-window (get-buffer-window (current-buffer) t)
(frame-width))
(frame-width)))
(t
(if (window-live-p (get-buffer-window (current-buffer) t))
(with-selected-window (get-buffer-window (current-buffer) t)
(window-width))
(window-width)))))))
(setq-local Man-columns (Man-columns))
(setenv "COLUMNS" (number-to-string Man-columns)))
;; Since man-db 2.4.3-1, man writes plain text with no escape
;; sequences when stdout is not a tty. In 2.5.0, the following
;; env-var was added to allow control of this (see Debian Bug#340673).
......@@ -1157,6 +1173,25 @@ Return the buffer in which the manpage will appear."
(search-backward text nil t))
(search-forward text nil t)))))
(defvar Man--window-state-change-timer nil)
(defun Man--window-state-change (window)
(unless (integerp Man-width)
(when (timerp Man--window-state-change-timer)
(cancel-timer Man--window-state-change-timer))
(setq Man--window-state-change-timer
(run-with-idle-timer 1 nil #'Man-fit-to-window window))))
(defun Man-fit-to-window (window)
"Adjust width of the buffer to fit columns into WINDOW boundaries."
(when (window-live-p window)
(with-current-buffer (window-buffer window)
(when (and (derived-mode-p 'Man-mode)
(not (eq Man-columns (Man-columns))))
(let ((proc (get-buffer-process (current-buffer))))
(unless (and proc (not (eq (process-status proc) 'exit)))
(Man-update-manpage)))))))
(defun Man-notify-when-ready (man-buffer)
"Notify the user when MAN-BUFFER is ready.
See the variable `Man-notify-method' for the different notification behaviors."
......@@ -1543,7 +1578,8 @@ The following key bindings are currently in effect in the buffer:
(set (make-local-variable 'outline-regexp) Man-heading-regexp)
(set (make-local-variable 'outline-level) (lambda () 1))
(set (make-local-variable 'bookmark-make-record-function)
'Man-bookmark-make-record))
'Man-bookmark-make-record)
(add-hook 'window-state-change-functions #'Man--window-state-change nil t))
(defun Man-build-section-list ()
"Build the list of manpage sections."
......
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