[unix-history] / usr / othersrc / public / less-177 / CHANGES

	Major changes between "less" versions 123 and 170

* New option -j allows target lines to be positioned anywhere on screen.

* New option -S truncates displayed line at the screen width,
  rather than wrapping onto the next line.

* New option -y limits amount of forward scroll.

* New option -T specifies a "tags" file.

* Non-printable, non-control characters are displayed in octal.
  Such characters, as well as control characters, are displayed 
  in blinking mode.

* New command -+ sets an option to its default.
* New command -- sets an option to the opposite of its default.

* Lesskey file may have a string appended to a key's action,
  which acts as though typed in after the command.

* New commands ESC-^F and ESC-^B match arbitrary types of brackets.

* New command F monitors a growing file (like "tail -f").

* New command | pipes a section of the input file into a shell command.

* New command :x directly jumps to a file in the command line list.

* Search commands have been enhanced and reorganized:
	n	Repeat search, same direction.
	N	Repeat search, opposite direction.
	ESC-/	Search forward thru file boundaries
	ESC-?	Search backward thru file boundaries
	ESC-n	Repeat search thru file boundaries, same direction.
	ESC-N	Repeat search thru file boundaries, opposite direction.
  Special character * causes search to search thru file boundaries.
  Special character @ causes search to begin at start/end of file list.

* Examining a new file adds it to the command line list.
  A list of files, or an expression which matches more than one file,
  may be examined; all of them are added to the command line list.

* Environment variables LESSCHARSET and LESSCHARDEF can define
  a non-ASCII character set.

* Partial support for MSDOS, including options -R for repainting screen
  on quit, -v/-V to select video mode, and -W to change window size.


======================================================================


	Major changes between "less" versions 97 and 123

* New option (-N) causes line numbers to be displayed in the
  text of the file (like vi "set nu").

* New option (-?) prints help message immediately.

* New option (-r) displays "raw" control characters, without
  mapping them to ^X notation.

* New option (-f) forces less to open non-regular files
  (directories, etc).

* New option (-k) can be used to specify lesskey files by name.

* New option (-y) can be used to set a forward scroll limit
  (like -h sets a backward scroll limit).

* File marks (set by the m command) are now preserved when a new
  file is edited.  The ' command can thus be used to switch files.

* New command ESC-/ searches all files (on the command line) 
  for a pattern.

* New command ESC-n repeats previous search, spanning files.

* The N command has been changed to repeat the previous search
  in the reverse direction.  The old N command is still available 
  via :n.

* New command ESC-N repeats previous search in the reverse
  direction and spanning files.

* 8 bit characters are now supported.  A new option (-g) can be 
  used to strip off the eighth bit (the previous behavior).

* Options which take a following string (like -t) may now
  optionally have a space between the option letter and the string.

* Six new commands { } ( ) [ and ] can be used to match
  brackets of specific types, similar to vi % command.

* New commands z and w move forward/backward one window and
  simultaneously set the window size.

* Prompt string expansion now has %L for line number of the last
  line in the file, and %E for the name of the editor.
  Also, % escapes which refer to a line (b=bottom, t=top, etc.)
  can use j for the jump target line.

* New environment variable LESSEDIT can be used to tailor the
  command string passed to the editor by the v command.

* Examining a file which was previously examined will return
  to the same position in the file.

* A "%" is expanded to the current filename and a "#" to the 
  previous filename, in both shell commands and the E command.
  (Previously % worked only in shell commands and # worked 
  only in the E command.)

* New command ":ta" is equivalent to "-t".

* New command "s" is equivalent to "-l".

* The - command may be followed by "+X" to revert to the default
  for option X, or "-X" to get the opposite of the default.

* Lesskey files may now include characters after the action as
  extra input to be parsed after the action; for example:
  "toggle-option X" to toggle a specific option X.
Commit	Line	Data
77e25d77 WJ	1	Major changes between "less" versions 123 and 170
	2
	3	* New option -j allows target lines to be positioned anywhere on screen.
	4
	5	* New option -S truncates displayed line at the screen width,
	6	rather than wrapping onto the next line.
	7
	8	* New option -y limits amount of forward scroll.
	9
	10	* New option -T specifies a "tags" file.
	11
	12	* Non-printable, non-control characters are displayed in octal.
	13	Such characters, as well as control characters, are displayed
	14	in blinking mode.
	15
	16	* New command -+ sets an option to its default.
	17	* New command -- sets an option to the opposite of its default.
	18
	19	* Lesskey file may have a string appended to a key's action,
	20	which acts as though typed in after the command.
	21
	22	* New commands ESC-^F and ESC-^B match arbitrary types of brackets.
	23
	24	* New command F monitors a growing file (like "tail -f").
	25
	26	* New command \| pipes a section of the input file into a shell command.
	27
	28	* New command :x directly jumps to a file in the command line list.
	29
	30	* Search commands have been enhanced and reorganized:
	31	n Repeat search, same direction.
	32	N Repeat search, opposite direction.
	33	ESC-/ Search forward thru file boundaries
	34	ESC-? Search backward thru file boundaries
	35	ESC-n Repeat search thru file boundaries, same direction.
	36	ESC-N Repeat search thru file boundaries, opposite direction.
	37	Special character * causes search to search thru file boundaries.
	38	Special character @ causes search to begin at start/end of file list.
	39
	40	* Examining a new file adds it to the command line list.
	41	A list of files, or an expression which matches more than one file,
	42	may be examined; all of them are added to the command line list.
	43
	44	* Environment variables LESSCHARSET and LESSCHARDEF can define
	45	a non-ASCII character set.
	46
	47	* Partial support for MSDOS, including options -R for repainting screen
	48	on quit, -v/-V to select video mode, and -W to change window size.
	49
	50
	51	======================================================================
	52
	53
	54	Major changes between "less" versions 97 and 123
	55
	56	* New option (-N) causes line numbers to be displayed in the
	57	text of the file (like vi "set nu").
	58
	59	* New option (-?) prints help message immediately.
	60
	61	* New option (-r) displays "raw" control characters, without
	62	mapping them to ^X notation.
	63
	64	* New option (-f) forces less to open non-regular files
65	(directories, etc).
66
67	* New option (-k) can be used to specify lesskey files by name.
68
69	* New option (-y) can be used to set a forward scroll limit
70	(like -h sets a backward scroll limit).
71
72	* File marks (set by the m command) are now preserved when a new
73	file is edited. The ' command can thus be used to switch files.
74
75	* New command ESC-/ searches all files (on the command line)
76	for a pattern.
77
78	* New command ESC-n repeats previous search, spanning files.
79
80	* The N command has been changed to repeat the previous search
81	in the reverse direction. The old N command is still available
82	via :n.
83
84	* New command ESC-N repeats previous search in the reverse
85	direction and spanning files.
86
87	* 8 bit characters are now supported. A new option (-g) can be
88	used to strip off the eighth bit (the previous behavior).
89
90	* Options which take a following string (like -t) may now
91	optionally have a space between the option letter and the string.
92
93	* Six new commands { } ( ) [ and ] can be used to match
94	brackets of specific types, similar to vi % command.
95
96	* New commands z and w move forward/backward one window and
97	simultaneously set the window size.
98
99	* Prompt string expansion now has %L for line number of the last
100	line in the file, and %E for the name of the editor.
101	Also, % escapes which refer to a line (b=bottom, t=top, etc.)
102	can use j for the jump target line.
103
104	* New environment variable LESSEDIT can be used to tailor the
105	command string passed to the editor by the v command.
106
107	* Examining a file which was previously examined will return
108	to the same position in the file.
109
110	* A "%" is expanded to the current filename and a "#" to the
111	previous filename, in both shell commands and the E command.
112	(Previously % worked only in shell commands and # worked
113	only in the E command.)
114
115	* New command ":ta" is equivalent to "-t".
116
117	* New command "s" is equivalent to "-l".
118
119	* The - command may be followed by "+X" to revert to the default
120	for option X, or "-X" to get the opposite of the default.
121
122	* Lesskey files may now include characters after the action as
123	extra input to be parsed after the action; for example:
124	"toggle-option X" to toggle a specific option X.