Implement alternative sub-buffer support in term.el
* etc/e/eterm-color.ti: Added termcaps for entering and leaving an alternative sub-buffer. * lisp/term.el (term-reset-size): Resize correctly in an alternative sub-buffer is in use. (term-clear-full-screen-programs): New user option. (term-handle-ansi-escape): (term-termcap-format): Handle termcaps for entering and leaving an alternative sub-buffer. (term-switch-to-alternate-sub-buffer): New (used to be commented out) function to enter or leave an alternative sub-buffer. bug#53485
This commit is contained in:
Miha Rihtaršič
Lars Ingebrigtsen
parent
b93902e22b
commit
81886aeaff
4 changed files with 60 additions and 37 deletions
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@ -16,6 +16,7 @@ eterm-color|Emacs term.el terminal emulator term-protocol-version 0.96,
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am,
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mir,
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msgr,
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nrrmc,
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xenl,
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bel=^G,
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blink=\E[5m,
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@ -77,8 +78,8 @@ eterm-color|Emacs term.el terminal emulator term-protocol-version 0.96,
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smso=\E[7m,
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u6=\E[%i%d;%dR,
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u7=\E[6n,
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# smcup=\E[?47h,
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# rmcup=\E[?47l,
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smcup=\E[47h,
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rmcup=\E[47l,
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# rs2 may need to be added
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eterm-direct|Emacs term.el with direct-color indexing term-protocol-version 0.96,
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92
lisp/term.el
92
lisp/term.el
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@ -523,6 +523,16 @@ This means text can automatically reflow if the window is resized."
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(make-obsolete-variable 'term-suppress-hard-newline nil
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"27.1")
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(defcustom term-clear-full-screen-programs t
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"Whether to clear contents of full-screen TUI programs after exit.
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If non-nil, output of full-screen TUI programs is cleared after
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exiting them. Note however that a minority of such programs
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don't send an appropriate escape sequence to the terminal before
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exiting so their output isn't cleared regardless of this option."
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:version "29.1"
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:type 'boolean
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:group 'term)
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;; Where gud-display-frame should put the debugging arrow. This is
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;; set by the marker-filter, which scans the debugger's output for
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;; indications of the current pc.
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@ -1270,7 +1280,8 @@ Entry to this mode runs the hooks on `term-mode-hook'."
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(when (/= width term-width)
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(save-excursion
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(term--remove-fake-newlines)))
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(let ((point (point)))
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(let ((point (point))
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(home-marker (marker-position term-home-marker)))
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(setq term-height height)
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(setq term-width width)
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(setq term-start-line-column nil)
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@ -1279,11 +1290,20 @@ Entry to this mode runs the hooks on `term-mode-hook'."
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(term--reset-scroll-region)
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;; `term-set-scroll-region' causes these to be set, we have to
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;; clear them again since we're changing point (Bug#30544).
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(term--unwrap-visible-long-lines width)
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(setq term-start-line-column nil)
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(setq term-current-row nil)
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(setq term-current-column nil)
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(goto-char point))
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(term--unwrap-visible-long-lines width)))
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(goto-char point)
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(when (term-using-alternate-sub-buffer)
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(term-handle-deferred-scroll)
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;; When using an alternative sub-buffer, the home marker should
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;; not move forward. Bring it back by deleting text in front of
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;; it.
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(when (> term-home-marker home-marker)
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(let ((inhibit-read-only t))
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(delete-region home-marker term-home-marker)))))))
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;; Recursive routine used to check if any string in term-kill-echo-list
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;; matches part of the buffer before point.
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@ -1611,6 +1631,7 @@ Using \"emacs\" loses, because bash disables editing if $TERM == emacs.")
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"%s%s:li#%d:co#%d:cl=\\E[H\\E[J:cd=\\E[J:bs:am:xn:cm=\\E[%%i%%d;%%dH\
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:nd=\\E[C:up=\\E[A:ce=\\E[K:ho=\\E[H:pt\
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:al=\\E[L:dl=\\E[M:DL=\\E[%%dM:AL=\\E[%%dL:cs=\\E[%%i%%d;%%dr:sf=^J\
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:NR:te=\\E[47l:ti=\\E[47h\
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:dc=\\E[P:DC=\\E[%%dP:IC=\\E[%%d@:im=\\E[4h:ei=\\E[4l:mi:\
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:mb=\\E[5m:mh=\\E[2m:ZR=\\E[23m:ZH=\\E[3m\
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:so=\\E[7m:se=\\E[m:us=\\E[4m:ue=\\E[m:md=\\E[1m:mr=\\E[7m:me=\\E[m\
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@ -3539,16 +3560,14 @@ otherwise use the current foreground color."
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((eq char ?h)
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(cond ((eq (car params) 4) ;; (terminfo: smir)
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(setq term-insert-mode t))
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;; ((eq (car params) 47) ;; (terminfo: smcup)
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;; (term-switch-to-alternate-sub-buffer t))
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))
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((eq (car params) 47) ;; (terminfo: smcup)
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(term-switch-to-alternate-sub-buffer t))))
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;; \E[?l - DEC Private Mode Reset
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((eq char ?l)
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(cond ((eq (car params) 4) ;; (terminfo: rmir)
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(setq term-insert-mode nil))
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;; ((eq (car params) 47) ;; (terminfo: rmcup)
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;; (term-switch-to-alternate-sub-buffer nil))
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))
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((eq (car params) 47) ;; (terminfo: rmcup)
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(term-switch-to-alternate-sub-buffer nil))))
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;; Modified to allow ansi coloring -mm
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;; \E[m - Set/reset modes, set bg/fg
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@ -3595,32 +3614,35 @@ The top-most line is line 0."
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(term-move-columns (- (term-current-column)))
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(term-goto 0 0))
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;; (defun term-switch-to-alternate-sub-buffer (set)
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;; ;; If asked to switch to (from) the alternate sub-buffer, and already (not)
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;; ;; using it, do nothing. This test is needed for some programs (including
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;; ;; Emacs) that emit the ti termcap string twice, for unknown reason.
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;; (term-handle-deferred-scroll)
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;; (if (eq set (not (term-using-alternate-sub-buffer)))
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;; (let ((row (term-current-row))
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;; (col (term-horizontal-column)))
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;; (cond (set
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;; (goto-char (point-max))
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;; (if (not (eq (preceding-char) ?\n))
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;; (term-insert-char ?\n 1))
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;; (setq term-scroll-with-delete t)
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;; (setq term-saved-home-marker (copy-marker term-home-marker))
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;; (set-marker term-home-marker (point)))
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;; (t
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;; (setq term-scroll-with-delete
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;; (not (and (= term-scroll-start 0)
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;; (= term-scroll-end term-height))))
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;; (set-marker term-home-marker term-saved-home-marker)
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;; (set-marker term-saved-home-marker nil)
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;; (setq term-saved-home-marker nil)
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;; (goto-char term-home-marker)))
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;; (setq term-current-column nil)
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;; (setq term-current-row 0)
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;; (term-goto row col))))
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(defun term-switch-to-alternate-sub-buffer (set)
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;; If asked to switch to (from) the alternate sub-buffer, and already (not)
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;; using it, do nothing. This test is needed for some programs (including
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;; Emacs) that emit the ti termcap string twice, for unknown reason.
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(term-handle-deferred-scroll)
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(when (eq set (not (term-using-alternate-sub-buffer)))
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(cond
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(set
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(goto-char (point-max))
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(if (not (eq (preceding-char) ?\n))
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(term-insert-char ?\n 1))
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(setq term-scroll-with-delete t)
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(setq term-saved-home-marker (copy-marker term-home-marker))
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(set-marker term-home-marker (point)))
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(t
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(setq term-scroll-with-delete
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(not (and (= term-scroll-start 0)
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(= term-scroll-end (term--last-line)))))
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(goto-char (point-max))
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(when term-clear-full-screen-programs
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(delete-region term-home-marker (point))
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(set-marker term-home-marker term-saved-home-marker))
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(set-marker term-saved-home-marker nil)
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(setq term-saved-home-marker nil)))
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(setq term-start-line-column nil)
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(setq term-current-column nil)
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(setq term-current-row nil)
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(term-handle-deferred-scroll)))
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;; Default value for the symbol term-command-function.
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