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This imports readline 8.0. readline/ChangeLog.gdb 2019-08-12 Tom Tromey <tom@tromey.com> * Imported readline 8.0.
367 lines
16 KiB
Plaintext
367 lines
16 KiB
Plaintext
This is a terse description of the new features added to readline-8.0 since
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the release of readline-7.0.
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New Features in Readline
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a. Non-incremental vi-mode search (`N', `n') can search for a shell pattern, as
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Posix specifies (uses fnmatch(3) if available).
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b. There are new `next-screen-line' and `previous-screen-line' bindable
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commands, which move the cursor to the same column in the next, or previous,
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physical line, respectively.
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c. There are default key bindings for control-arrow-key key combinations.
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d. A negative argument (-N) to `quoted-insert' means to insert the next N
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characters using quoted-insert.
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e. New public function: rl_check_signals(), which allows applications to
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respond to signals that readline catches while waiting for input using
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a custom read function.
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f. There is new support for conditionally testing the readline version in an
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inputrc file, with a full set of arithmetic comparison operators available.
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g. There is a simple variable comparison facility available for use within an
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inputrc file. Allowable operators are equality and inequality; string
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variables may be compared to a value; boolean variables must be compared to
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either `on' or `off'; variable names are separated from the operator by
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whitespace.
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h. The history expansion library now understands command and process
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substitution and extended globbing and allows them to appear anywhere in a
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word.
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i. The history library has a new variable that allows applications to set the
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initial quoting state, so quoting state can be inherited from a previous
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line.
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j. Readline now allows application-defined keymap names; there is a new public
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function, rl_set_keymap_name(), to do that.
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k. The "Insert" keypad key, if available, now puts readline into overwrite
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mode.
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-------------------------------------------------------------------------------
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This is a terse description of the new features added to readline-7.0 since
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the release of readline-6.3.
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New Features in Readline
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a. The history truncation code now uses the same error recovery mechansim as
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the history writing code, and restores the old version of the history file
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on error. The error recovery mechanism handles symlinked history files.
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b. There is a new bindable variable, `enable-bracketed-paste', which enables
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support for a terminal's bracketed paste mode.
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c. The editing mode indicators can now be strings and are user-settable
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(new `emacs-mode-string', `vi-cmd-mode-string' and `vi-ins-mode-string'
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variables). Mode strings can contain invisible character sequences.
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Setting mode strings to null strings restores the defaults.
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d. Prompt expansion adds the mode string to the last line of a multi-line
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prompt (one with embedded newlines).
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e. There is a new bindable variable, `colored-completion-prefix', which, if
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set, causes the common prefix of a set of possible completions to be
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displayed in color.
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f. There is a new bindable command `vi-yank-pop', a vi-mode version of emacs-
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mode yank-pop.
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g. The redisplay code underwent several efficiency improvements for multibyte
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locales.
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h. The insert-char function attempts to batch-insert all pending typeahead
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that maps to self-insert, as long as it is coming from the terminal.
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i. rl_callback_sigcleanup: a new application function that can clean up and
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unset any state set by readline's callback mode. Intended to be used
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after a signal.
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j. If an incremental search string has its last character removed with DEL, the
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resulting empty search string no longer matches the previous line.
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k. If readline reads a history file that begins with `#' (or the value of
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the history comment character) and has enabled history timestamps, the history
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entries are assumed to be delimited by timestamps. This allows multi-line
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history entries.
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l. Readline now throws an error if it parses a key binding without a terminating
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`:' or whitespace.
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m. The default binding for ^W in vi mode now uses word boundaries specified
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by Posix (vi-unix-word-rubout is bindable command name).
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n. rl_clear_visible_line: new application-callable function; clears all
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screen lines occupied by the current visible readline line.
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o. rl_tty_set_echoing: application-callable function that controls whether
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or not readline thinks it is echoing terminal output.
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p. Handle >| and strings of digits preceding and following redirection
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specifications as single tokens when tokenizing the line for history
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expansion.
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q. Fixed a bug with displaying completions when the prefix display length
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is greater than the length of the completions to be displayed.
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r. The :p history modifier now applies to the entire line, so any expansion
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specifying :p causes the line to be printed instead of expanded.
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s. New application-callable function: rl_pending_signal(): returns the signal
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number of any signal readline has caught but not yet handled.
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t. New application-settable variable: rl_persistent_signal_handlers: if set
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to a non-zero value, readline will enable the readline-6.2 signal handler
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behavior in callback mode: handlers are installed when
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rl_callback_handler_install is called and removed removed when a complete
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line has been read.
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-------------------------------------------------------------------------------
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This is a terse description of the new features added to readline-6.3 since
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the release of readline-6.2.
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New Features in Readline
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a. Readline is now more responsive to SIGHUP and other fatal signals when
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reading input from the terminal or performing word completion but no
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longer attempts to run any not-allowable functions from a signal handler
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context.
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b. There are new bindable commands to search the history for the string of
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characters between the beginning of the line and the point
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(history-substring-search-forward, history-substring-search-backward)
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c. Readline allows quoted strings as the values of variables when setting
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them with `set'. As a side effect, trailing spaces and tabs are ignored
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when setting a string variable's value.
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d. The history library creates a backup of the history file when writing it
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and restores the backup on a write error.
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e. New application-settable variable: rl_filename_stat_hook: a function called
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with a filename before using it in a call to stat(2). Bash uses it to
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expand shell variables so things like $HOME/Downloads have a slash
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appended.
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f. New bindable function `print-last-kbd-macro', prints the most-recently-
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defined keyboard macro in a reusable format.
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g. New user-settable variable `colored-stats', enables use of colored text
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to denote file types when displaying possible completions (colored analog
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of visible-stats).
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h. New user-settable variable `keyseq-timout', acts as an inter-character
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timeout when reading input or incremental search strings.
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i. New application-callable function: rl_clear_history. Clears the history list
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and frees all readline-associated private data.
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j. New user-settable variable, show-mode-in-prompt, adds a characters to the
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beginning of the prompt indicating the current editing mode.
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k. New application-settable variable: rl_input_available_hook; function to be
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called when readline detects there is data available on its input file
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descriptor.
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l. Readline calls an application-set event hook (rl_event_hook) after it gets
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a signal while reading input (read returns -1/EINTR but readline does not
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handle the signal immediately) to allow the application to handle or
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otherwise note it.
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m. If the user-settable variable `history-size' is set to a value less than
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0, the history list size is unlimited.
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n. New application-settable variable: rl_signal_event_hook; function that is
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called when readline is reading terminal input and read(2) is interrupted
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by a signal. Currently not called for SIGHUP or SIGTERM.
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-------------------------------------------------------------------------------
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This is a terse description of the new features added to readline-6.1 since
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the release of readline-6.0.
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New Features in Readline
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a. New bindable function: menu-complete-backward.
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b. In the vi insertion keymap, C-n is now bound to menu-complete by default,
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and C-p to menu-complete-backward.
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c. When in vi command mode, repeatedly hitting ESC now does nothing, even
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when ESC introduces a bound key sequence. This is closer to how
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historical vi behaves.
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d. New bindable function: skip-csi-sequence. Can be used as a default to
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consume key sequences generated by keys like Home and End without having
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to bind all keys.
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e. New application-settable function: rl_filename_rewrite_hook. Can be used
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to rewite or modify filenames read from the file system before they are
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compared to the word to be completed.
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f. New bindable variable: skip-completed-text, active when completing in the
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middle of a word. If enabled, it means that characters in the completion
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that match characters in the remainder of the word are "skipped" rather
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than inserted into the line.
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g. The pre-readline-6.0 version of menu completion is available as
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"old-menu-complete" for users who do not like the readline-6.0 version.
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h. New bindable variable: echo-control-characters. If enabled, and the
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tty ECHOCTL bit is set, controls the echoing of characters corresponding
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to keyboard-generated signals.
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i. New bindable variable: enable-meta-key. Controls whether or not readline
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sends the smm/rmm sequences if the terminal indicates it has a meta key
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that enables eight-bit characters.
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-------------------------------------------------------------------------------
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This is a terse description of the new features added to readline-6.0 since
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the release of readline-5.2.
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New Features in Readline
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a. A new variable, rl_sort_completion_matches; allows applications to inhibit
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match list sorting (but beware: some things don't work right if
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applications do this).
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b. A new variable, rl_completion_invoking_key; allows applications to discover
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the key that invoked rl_complete or rl_menu_complete.
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c. The functions rl_block_sigint and rl_release_sigint are now public and
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available to calling applications who want to protect critical sections
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(like redisplay).
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d. The functions rl_save_state and rl_restore_state are now public and
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available to calling applications; documented rest of readline's state
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flag values.
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e. A new user-settable variable, `history-size', allows setting the maximum
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number of entries in the history list.
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f. There is a new implementation of menu completion, with several improvements
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over the old; the most notable improvement is a better `completions
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browsing' mode.
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g. The menu completion code now uses the rl_menu_completion_entry_function
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variable, allowing applications to provide their own menu completion
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generators.
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h. There is support for replacing a prefix of a pathname with a `...' when
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displaying possible completions. This is controllable by setting the
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`completion-prefix-display-length' variable. Matches with a common prefix
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longer than this value have the common prefix replaced with `...'.
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i. There is a new `revert-all-at-newline' variable. If enabled, readline will
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undo all outstanding changes to all history lines when `accept-line' is
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executed.
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-------------------------------------------------------------------------------
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This is a terse description of the new features added to readline-5.2 since
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the release of readline-5.1.
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New Features in Readline
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a. Calling applications can now set the keyboard timeout to 0, allowing
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poll-like behavior.
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b. The value of SYS_INPUTRC (configurable at compilation time) is now used as
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the default last-ditch startup file.
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c. The history file reading functions now allow windows-like \r\n line
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terminators.
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-------------------------------------------------------------------------------
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This is a terse description of the new features added to readline-5.1 since
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the release of readline-5.0.
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New Features in Readline
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a. The key sequence sent by the keypad `delete' key is now automatically
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bound to delete-char.
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b. A negative argument to menu-complete now cycles backward through the
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completion list.
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c. A new bindable readline variable: bind-tty-special-chars. If non-zero,
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readline will bind the terminal special characters to their readline
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equivalents when it's called (on by default).
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d. New bindable command: vi-rubout. Saves deleted text for possible
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reinsertion, as with any vi-mode `text modification' command; `X' is bound
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to this in vi command mode.
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e. If the rl_completion_query_items is set to a value < 0, readline never
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asks the user whether or not to view the possible completions.
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f. New application-callable auxiliary function, rl_variable_value, returns
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a string corresponding to a readline variable's value.
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g. When parsing inputrc files and variable binding commands, the parser
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strips trailing whitespace from values assigned to boolean variables
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before checking them.
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h. A new external application-controllable variable that allows the LINES
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and COLUMNS environment variables to set the window size regardless of
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what the kernel returns.
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-------------------------------------------------------------------------------
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This is a terse description of the new features added to readline-5.0 since
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the release of readline-4.3.
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New Features in Readline
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a. History expansion has a new `a' modifier equivalent to the `g' modifier
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for compatibility with the BSD csh.
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b. History expansion has a new `G' modifier equivalent to the BSD csh `g'
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modifier, which performs a substitution once per word.
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c. All non-incremental search operations may now undo the operation of
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replacing the current line with the history line.
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d. The text inserted by an `a' command in vi mode can be reinserted with
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`.'.
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e. New bindable variable, `show-all-if-unmodified'. If set, the readline
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completer will list possible completions immediately if there is more
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than one completion and partial completion cannot be performed.
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f. There is a new application-callable `free_history_entry()' function.
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g. History list entries now contain timestamp information; the history file
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functions know how to read and write timestamp information associated
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with each entry.
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h. Four new key binding functions have been added:
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rl_bind_key_if_unbound()
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rl_bind_key_if_unbound_in_map()
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rl_bind_keyseq_if_unbound()
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rl_bind_keyseq_if_unbound_in_map()
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i. New application variable, rl_completion_quote_character, set to any
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quote character readline finds before it calls the application completion
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function.
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j. New application variable, rl_completion_suppress_quote, settable by an
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application completion function. If set to non-zero, readline does not
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attempt to append a closing quote to a completed word.
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k. New application variable, rl_completion_found_quote, set to a non-zero
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value if readline determines that the word to be completed is quoted.
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Set before readline calls any application completion function.
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l. New function hook, rl_completion_word_break_hook, called when readline
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needs to break a line into words when completion is attempted. Allows
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the word break characters to vary based on position in the line.
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m. New bindable command: unix-filename-rubout. Does the same thing as
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unix-word-rubout, but adds `/' to the set of word delimiters.
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n. When listing completions, directories have a `/' appended if the
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`mark-directories' option has been enabled.
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