Revert "Disable bracketed paste in a terminal in char mode"

This change causes regressions, and besides, disabling BPM frame-wide
for the sake of one buffer is the wrong solution.

This reverts commit cf566b46a6.

lisp/term.el

@@ -1247,11 +1247,6 @@ intervention from Emacs, except for the escape character (usually C-c)."
 	      (end-of-line)
 	      (term-send-input))
 	  (setq term-input-sender save-input-sender))))
-
-    ;; Turn off XTerm bracketed paste (Bug#24639).
-    (when (fboundp 'xterm-inhibit-bracketed-paste-mode)
-      (xterm-inhibit-bracketed-paste-mode))
-
     (term-update-mode-line)))
 
 (defun term-line-mode  ()
@@ -1261,8 +1256,6 @@ you type \\[term-send-input] which sends the current line to the inferior."
   (interactive)
   (when (term-in-char-mode)
     (use-local-map term-old-mode-map)
-    (when (fboundp 'xterm-inhibit-bracketed-paste-mode)
-      (xterm-inhibit-bracketed-paste-mode 0))
     (term-update-mode-line)))
 
 (defun term-update-mode-line ()

lisp/term/xterm.el

@@ -24,8 +24,6 @@
 
 ;;; Code:
 
-(require 'cl-lib)
-
 (defgroup xterm nil
   "XTerm support."
   :version "24.1"
@@ -767,78 +765,6 @@ We run the first FUNCTION whose STRING matches the input events."
    basemap
    (make-composed-keymap map (keymap-parent basemap))))
 
-(define-minor-mode xterm-inhibit-bracketed-paste-mode
-  "Toggle whether XTerm bracketed paste should be allowed in this buffer.
-With a prefix argument ARG, forbid bracketed paste if ARG is
-positive, and allow it otherwise.  If called from Lisp, forbid
-bracketed paste if ARG is omitted or nil, and toggle the state of
-ARG is `toggle'.  If XTerm bracketed paste is allowed (the
-default), it will be used to paste text from an X selection upon
-reception of the `xterm-paste' event.  Otherwise the selection
-will be inserted character by character, which is much slower.
-Therefore, bracketed paste should only be disabled in buffers
-that can't deal with the `xterm-paste' event, such as terminal
-emulation buffers."
-  :group xterm
-  ;; Update the bracketed paste flag in all terminals that display the
-  ;; current buffer.
-  (mapc #'xterm--update-bracketed-paste (xterm--buffer-terminals)))
-
-(defun xterm--buffer-terminals (&optional buffer)
-  "Return all terminals that contain a window that displays BUFFER.
-BUFFER defaults to the current buffer."
-  (cl-delete-duplicates
-   (cl-loop for window in (get-buffer-window-list buffer nil t)
-            for terminal = (frame-terminal (window-frame window))
-            collect terminal)
-   :test 'eq))
-
-(defun xterm--update-bracketed-paste (&optional terminal)
-  "Enable or disable bracketed paste for TERMINAL.
-TERMINAL must be a live terminal; it defaults to the terminal
-displaying the selected frame.  If any buffer displayed on the
-frames of TERMINAL inhibits bracketed paste by enabling
-`xterm-inhibit-bracketed-paste-mode', disable bracketed paste for
-TERMINAL.  If there is no such buffer, enable bracketed paste."
-  (unless terminal (setq terminal (frame-terminal)))
-  (cl-check-type terminal terminal-live)
-  (when (xterm--is-xterm terminal)
-    (cl-symbol-macrolet
-        ((enabled-param (terminal-parameter terminal 'xterm--bracketed-paste))
-         (set-strings-param (terminal-parameter terminal 'tty-mode-set-strings))
-         (reset-strings-param
-          (terminal-parameter terminal 'tty-mode-reset-strings)))
-      (let ((is-enabled enabled-param)
-            (should-enable (xterm--bracketed-paste-possible terminal))
-            (enable-seq "\e[?2004h")
-            (disable-seq "\e[?2004l"))
-        (cond
-         ;; Unconditionally send terminal sequences: terminals that
-         ;; don't support bracketed paste just ignore the sequences.
-         ((and (not is-enabled) should-enable)
-          (send-string-to-terminal enable-seq terminal)
-          (push disable-seq reset-strings-param)
-          (push enable-seq set-strings-param)
-          (setq enabled-param t))
-         ((and is-enabled (not should-enable))
-          (send-string-to-terminal disable-seq)
-          (cl-callf2 delete disable-seq reset-strings-param)
-          (cl-callf2 delete enable-seq set-strings-param)
-          (setq enabled-param nil)))))))
-
-(defun xterm--bracketed-paste-possible (terminal)
-  "Return non-nil if bracketed paste could be enabled on TERMINAL.
-If any buffer displayed on the frames of TERMINAL inhibits
-bracketed paste by enabling `xterm-inhibit-bracketed-paste-mode',
-return nil.  If there is no such buffer, return non-nil."
-  (cl-check-type terminal terminal-live)
-  (cl-loop for frame being the frames
-           if (eq (frame-terminal frame) terminal)
-           always (cl-loop
-                   for window being the windows of frame
-                   never (buffer-local-value 'xterm-inhibit-bracketed-paste-mode
-                                             (window-buffer window)))))
-
 (defun terminal-init-xterm ()
   "Terminal initialization function for xterm."
   ;; rxvt terminals sometimes set the TERM variable to "xterm", but
@@ -876,8 +802,9 @@ return nil.  If there is no such buffer, return non-nil."
     (when (memq 'setSelection xterm-extra-capabilities)
       (xterm--init-activate-set-selection)))
 
-  (add-hook 'window-configuration-change-hook #'xterm--update-bracketed-paste)
-  (xterm--update-bracketed-paste)
+  ;; Unconditionally enable bracketed paste mode: terminals that don't
+  ;; support it just ignore the sequence.
+  (xterm--init-bracketed-paste-mode)
 
   (run-hooks 'terminal-init-xterm-hook))
 
@@ -887,6 +814,12 @@ return nil.  If there is no such buffer, return non-nil."
   (push "\e[>4m" (terminal-parameter nil 'tty-mode-reset-strings))
   (push "\e[>4;1m" (terminal-parameter nil 'tty-mode-set-strings)))
 
+(defun xterm--init-bracketed-paste-mode ()
+  "Terminal initialization for bracketed paste mode."
+  (send-string-to-terminal "\e[?2004h")
+  (push "\e[?2004l" (terminal-parameter nil 'tty-mode-reset-strings))
+  (push "\e[?2004h" (terminal-parameter nil 'tty-mode-set-strings)))
+
 (defun xterm--init-activate-get-selection ()
   "Terminal initialization for `gui-get-selection'."
   (set-terminal-parameter nil 'xterm--get-selection t))
@@ -1067,11 +1000,6 @@ versions of xterm."
     (set-terminal-parameter nil 'background-mode 'dark)
     t))
 
-(defun xterm--is-xterm (&optional terminal)
-  "Return non-nil if TERMINAL is an XTerm-like terminal.
-TERMINAL defaults to the terminal of the selected frame."
-  (eq (terminal-parameter terminal 'terminal-initted) 'terminal-init-xterm))
-
 (provide 'xterm)                        ;Backward compatibility.
 (provide 'term/xterm)
 ;;; xterm.el ends here