****** IMPORTANT NOTE *****
As of this release, several configuration keywords have changed:
The delimiters for the PROMPT and YESNO features have changed
from [] to {}.
The WILDCARD= option is no longer supported (or relevant).
Two new options, WILDFILTER = and WILDSELECT=, have replaced it.
Existing configurations files that use these will have to be changed
to reflect this.
BUG FIXES
- Fixed longstanding problem that prompt strings within PROMPT and
YESNO builtins were not preserved as written by the user.
Previously, multiple spaces were replaced with a single space. This
is now fixed, and both prompts and the new default feature will be
preserved exactly as written.
- It was previously possible to create a circular .include chain.
This is now explicitly checked for and prevented.
- Previously, if you used the -t command line option to suppress
quoting and then reloaded a configuration file, quoting would go
back to its default behavior (quoting with the " character). Now,
specifying -t suppresses quoting, even after a configuration reload.
CHANGES
- Changed the behavior of forced clearing with AFTERCLEAR option.
Previously this deselected all active selections AND repositioned
cursor to top of directory listing. This was inconvenient with a
large directory list. Behavior now is to only clear active
selections. Cursor is left at approximately the same location in
the displayed list.
- Variable references are now evaluated at command *execution* time.
(Previously they were evaluated at command definition time). This
was done to make it possible to include variable references
within PROMPT and YESNO operations that would not be evaluated
until the command was actually run.
- File lengths are now normalized for files > 1KB, 1MB, and 1GB.
Previously files less than 1MB were shown as actual length and files
greater than 1GB were expressed in MB. These normalized lengths
are now more accurately rounded than they were previously.
- A new option, ACTUALLENGTH (Default: False), can be set to display
actual rather than normalized file lengths. This can be toggled
with a new key binding, TOGLENGTH (Default: Control-0).
- File and drive (Win32 Drive List View) lengths are now displayed
right-justified within their respective fields. This makes both
normalized and actual length displays easier to read.
- The MOUSEWILD key binding has been renamed to MOUSEWILDSEL. This
will have no effect on configuration files since mouse bindings
cannot be changed.
- Selection by wildcard is now case-insensitive on Win32 by
default. This can be changed with the WILDNOCASE option.
- Debug option Bit 8 (0x100) now dumps the content of both the
Filtering and Selection wildcard lists as they change.
NEW FEATURES
- Added ability to insert a default value for PROMPT and YESNO
builtins. Syntax is: [BUILTIN:prompt text==>default text]. For
YESNO, the default text can only be "Yes" or "No" (case-
insensitive).
The default separator string, "==>" can be changed by setting the
new DEFAULTSEP option variable. Be careful to not use
any of the characters, []{}, in this delimiter string. The
program will get confused since it sees these as variable/builtin
delimiters.
- Added support for "Execution Variables". These are similar to Unix
shell "backtick" references. You do this in one of two forms:
var = [`command string`]
Sets var to string returned by executing "command string".
Any terminating newline is stripped off.
var = [`-command string`]
Sets var to string returned by executing "command string".
*All* newlines are replaced with spaces.
- It is now possible to embed variable references inside PROMPT
and YESNO builtins. For example, you can do things like:
PROMPT = New File Name?
r rename mv [SELECTION] {PROMPT:[PROMPT]==>[SELECTION]}
This brings up a prompt with a default of the filename to
be renamed - this allows you to modify the existing name easily,
without having to type the whole name in.
You can embed references to execution variables, builtin variables,
user variables, and environment variables anywhere within
PROMPT or YESNO constructs.
Note that because variables are now resolved when the command is
actually run, execution variables are evaluated anew *each time*
a command is run:
c count echo [`ls | wc`]
To the keep the parser reasonably sane, the delimiters for PROMPT
and YESNO have changed from [] to {}
NOTE: Existing configuration files will have to be changed.
The older [PROMPT ...] and [YESNO ...] forms are no
longer supported.
- It is now possible to use a wildcard to "filter" which files are
displayed in a given directory. This is helpful when a directory
contains many files, but you are only interested in a subset of
them.
The rules are the same as for selection wildcards. By default,
the string you enter can appear anywhere in the displayed line
for the filter to declare a match. You can escape this by
prepending a double-quote to your filter expression. In that
case, your entry is treated literally as the wildcard
specification used for matching.
This feature is invoked with new key binding, FILTERWILD
(Control-=).
The filter is reset when directory is changed or on a REFRESH
(Control-l).
The filter is applied to entire line in detailed view or just the
filename otherwise.
Note that *selection* by wildcard scans the currently-displayed
list of files and selects them, but *filtering* by wildcard scans
the *entire list of files in the current directory*, displaying
only those that match.
The filter is never applied to the ".." entry. That is, the the ".."
entry always appears regardless of the wildcard filter in effect.
The old Wildcard menu has been replaced by the Filter (Accel:
Alt-f) and Selection (Accel: Alt-t) menus that track wildcards
used for filtering and selection separately.
The WILDCARD= configuration statement has been replaced by the
WILDFILTER= and WILDSELECT= statements. These are used to
preload the Filter and Selection menus respectively.
A new mouse binding, MOUSEWILDFILTER (Alt-Control-MiddleButton)
has been added to popup the Filter menu near the current mouse
position.
A new filter wildcard is always applied against the *entire* directory
list, not just what is currently displayed.
Filter logic can be inverted with TOGFILT (Control-minus) key.
Supported by INVERTFILTER (Default: False) option. Sets initial state.
Wildcard filters are case-insensitive on Win32 by default and
case- sensitive on all other systems. This can be overriden with
the WILDNOCASE option. Escaped wildcard specifications are
always treated literally regardless of this option's setting.
twander 3.160 (1-12-2005):
===========================
BUG FIXES
- The keybinding definitions for the History and Wildcard mouse popup
menus were missing. MOUSEHIST and MOUSEWILD are now defined. Like
all other MOUSE bindings, these cannot be overriden by the user.
- The program would lockup when browsing a piece of removeable media,
if the media was then removed. The refresh logic now catches this
error and resets the view to the starting directory in this case.
This is not foolproof. The program will still lockup in this case
if the starting directory itself is no longer readable - i.e., It to
is (was) on a piece of removed media, for example.
- The copyright symbol that appears in the About menu and command line
help was not portable. Changed to a textual equivalent "(c)".
- Quite a bit of formatting cleanup in the documentation, especially
the HTML version.
CHANGES
- In previous versions, symbolic links were always treated as files
for purposes of sorting, if a "separated" sort (of directories and
files) was requested (the default). Symbolic links that point to
directories are now sorted as directories in this case. If you
prefer the old style behavior, set the new option, SYMDIR, to False.
- Since version 3.146, 'twander' commands could be defined or entered
to force a refresh when the command completes (by placing a '+'
symbol as the first character of the command). As of this release,
this feature also clears all active selections and repositions the
cursor under the first entry on the screen (".."). This was done
because commands requesting screen refresh presumably do something
that changes the content of the currently viewed directory (such as
a file delete). In this case, the active selections may not make
sense any longer. A new option, AFTERCLEAR, can be set to False to
revert to the old behavior that just did the refresh and left the
active selections alone.
- The internal variable that sets the GUI polling interval (POLLINT)
has been changed from a nominal 20ms to 250ms. This is the interval
at which the program checks to see whether or not it is time to
reread the current directory if AUTOREFRESH is enabled.
- In previous versions, if AUTOREFRESH was enabled, the program would
attempt to reread the current directory every REFRESHINT ms
(nominal). This could be a problem on very large/slow directory
reads (such as optical media) because as soon as one refresh was
done, it would be time for another. This effectively locked the
program up because it was constantly doing directory reads leaving
no time for user interaction. With this release, the refresh
interval is "adaptive" by default. Each directory refresh time is
measured and the refresh interval is dynamically adjusted to reflect
the actual amount of time needed to read a given directory. The
refresh interval is then "stretched" a bit, to give you time to
interact with the directory before another refresh begins. In no
case will this value ever be less than the value of REFRESHINT. A
new option, ADAPTREFRESH, enables this feature by default. If
ADAPTREFRESH is set to False, then the program reverts to its old
behavior of stictly observing the REFRESHINT interval.
NEW FEATURES
- Added the FORCEUNIXPATH option. If set to True, it forces the use
of the Unix path separator character ("/") when substituting
Built-In Variable and Program Memory references in command
definitions. This is handy when running Unix tools like cygwin
under Windows. This option is only observed on Windows systems; it
is ignored on other OS platforms.
- Previous versions primed the Directory menu with the user's
Directory Shortcut definition(s). This behavior is no longer present.
Instead there is a separate Shortcut menu on the menubar that
displays these values as well as several other shortcuts to go to
up, back, home, and to the starting and root directories
respectively. A new mouse popup keybinding, MOUSESC
has been defined as Control-Button3 so that this
menu can be popped up at the current pointer location.
On Windows systems using the Win32All extensions, an entry
for a Drive List also appears in the Shortcut menu.
- Added ability to pop-up the Sorting Menu with Alt-Shift-Button3.
Added the MOUSESORT key binding to define this.
twander 3.146 (3-11-2004):
===========================
BUG FIXES
- In previous versions, a redefinition of a particular command key
would cause old and new versions of the definition to appear in the
Command Menu. This has been fixed. Now only the command defintion
that is actually active (the last one that appears in the
configuration file) appears in the Command Menu.
- Entries in the Command Menu now appear strictly in the order of
their definition in the configuration file. This was not always the
case in previous releases.
- Help and Debug output is now consistently sorted.
CHANGES
- The title bar no longer has a separate entry to indicate reverse
sorts. Instead, when sorting is reversed, the field name being used
as the sort key has a '-' appended to it. This was done to make
the title bar less cluttered and of reasonable length.
- The directory path displayed on the title bar is now limited to
60 characters. Paths longer than this are truncated to the last
60 characters and "..." is prepended to the result to indicate
that a partial path is being displayed. This was done because
some systems, notably Win32, have very long path names. Moving
to these directories caused the other status information to the
right on the title bar to be lost.
NEW FEATURES
- The RUNCMD feature (default: Control-z) gives you to enter
commands "on-the-fly". It has always been possible to
make reference to built-in, user-defined, and environment
variables (via the "[vblname]" mechanism) when entering
commands manually. The most common use of this feature is
to include a reference to the current directory or item(s)
selected in the GUI as a part of the manual command. For
instance entering:
less [DSELECTIONS]
will let you page through all the files you currently have
selected.
Since this is used fairly often, "shortcut" forms for many of the
builtins have been implemented. You can enter either the full
variable name reference or its shortcut when using RUNCMD. This is
***only*** for RUNCMD. Configuration files still require the full
name to be used. This was an intentional design choice to keep the
configurations consistent and readable.
Here are the new shortcuts you can use in RUNCMD:
[D] for [DIR]
[DN] for [DSELECTION]
[DS] for [DSELECTIONS]
[SN] for [SELECTION]
[SS] for [SELECTIONS]
[1] for [MEM1]
[2] for [MEM2]
[3] for [MEM3]
[4] for [MEM4]
[5] for [MEM5]
[6] for [MEM6]
[7] for [MEM7]
[8] for [MEM8]
[9] for [MEM9]
[10] for [MEM10]
[11] for [MEM11]
[12] for [MEM12]
- The TOGAUTO Key (Default: Control-o) has been added to allow you to
toggle Autorefreshing on- and off. When working with very
large/slow directory reads, it is handly to temporarily turn off
refreshing (and do it manually as needed with the Refresh - Default:
Control-l) key. This is simpler than changing and reloading the
configuration file each time you want Autorefreshing disabled.
- The current state of Autofreshing is now displayed on the main
window title bar.
- You can now force a display refresh after a command is executed
by placing the REFRESHAFTER symbol (default: '+') at the beginning
of your command string in the configuration file. This also
works when entered manually via RUNCMD (default: Control-z).
This will take place regardless the current AUTOREFRESH setting.
- A new user-settable option variable, AFTERWAIT (default: 1) has
been added. This tells 'twander' how long to wait before
initiating a display refresh requested by the REFRESHAFTER
construct. This gives the system AFTERWAIT seconds to complete
the command before a display update is done. See documentation
for subtleties of using this feature.
- During actual refreshing - whether automatic, manual, because
of a directory change, or because of a REFRESHAFTER demand -
the Autorefresh state on the title bar has "*" appended to it.
Ordinarily, this happens so fast you do not see it. But on
really long refreshes, the asterisk is a visual confirmation
that the program is busy and not hung.
twander 3.135 (3-11-2003):
===========================
BUG FIXES
- Found (and fixed) last-minute bug which caused [DESELECTION]
and [SELECTION] to be returned incorrectly when nothing was
selected in the UI.
twander 3.134 (3-11-2003):
===========================
BUG FIXES
- Fixed a problem which caused User-Defined Commands to be processed
with the CMDSHELL option when such commands were re-invoked via the
Command History. The program now properly applies CMDSHELL
processing (if enabled) *only* to manually entered commands.
- Previous version allowed FONTDECR to set font sizes to 0 or even
negative values. Feature is now checked to make sure a font size is
never decremented below 1.
CHANGES
- USETHREADS is now False by default. Thread implementations
vary so much from system to system it seemed smarter to
make their use a conscious decision.
- The default for REFRESHINT is now 5000 (up from 3000) which
should make the program work a bit more smoothly "out of the
box" on slower systems and X connections.
- The About box on the Help Menu now displays the 'twander'
web site information.
- Quite a bit of new material added to the GOTCHAS section of
the documentation.
- Boolean Options are now shown as "True" or "False" rather than
1 or 0 in the relevant Help Menu and Debug output.
- Nothing pre-selected now when entering a new directory. Previously,
the first item ("..") was always selected. This prevents accidental
navigation on slow/unresponsive systems or X-Windows connections
where you can type faster than the screen can update.
- The MAXDIR, MAXDIRBUF, MAXHIST, and MAXHISTBUF options have been
removed. These are replaced by the new MAXMENU and MAXMENUBUF
options which control the depth and display of *all* menus
with dynamic content.
- User-Defined Variables, Directory Shortcuts, and Command Definitions
can now be redefined within the same Configuration File. This was
done to better exploit the new conditional operators and the new
".include" directive in the configuration language. Now you
can maintain a "standard" configuration which everyone on the system
can ".include", but anything in that configuration can be redefined
locally with your own configuration statements.
- A blank Right Hand Side is now permitted for all Option Statements.
It means that the statement in question is simply ignored. This was
done to make Option Statements consistent with Directory Shortcut
and User-Defined Variable Statements, both of which allow a blank
RHS.
- Because the RHS of a String Option can now be blank, the ""
construct is no longer necessary to disable CMDSHELL. An entry in
the form 'CMDSHELL = ' will do.
VERY IMPORTANT: if for some reason you have a line like 'CMDSHELL =
""' in your Configuration File, remove it! Otherwise a pair of
double-quotes will be prepended to every RUNCMD you issue - almost
certainly not what you want.
- The "escape" character to escape (defeat) CMDSHELL processing has
been changed from \ to ". This was done for two reasons.
First, the backslash character may occasionally be necessary to
escape the first letter of a command string. More importantly, the
" is used to escape for the new Wildcard feature. CMDSHELL was
thus changed so both features which permit "escapes" would use the
same character for consistency.
- The Free Space and Total Space of each drive in Drive List View
are now shown in separate columns to make sorting order clearer.
- The FreeBSD port Makefile has been cleaned up and updated.
NEW FEATURES
- Wildcard-Based Selection
It is now possible to select items using a user-specified wildcard
with the SELWILD feature. (default: Control-\) This feature makes
the full power of Python regular expressions available for selecting
the items desired. You may enter any literal text *or any
legitimate Python regular expression* in the SELWILD dialog and all
lines with matching expressions will be selected. (Note that the
"wildcards" used here are *not* the same thing as the standard Unix
shell wildcard "globbing" used for naming files.) For example, if
you enter: \.exe all files or directories which have the string
".exe" somewhere on their display line will be selected. SELWILD
will never include ".." in any wildcard-based selection even if
that entry matches the regular expression.
By default, SELWILD will select an entry when your regular
expression matches *anything on the displayed line*. This allows
you to make selections based on any visible column of information.
Of course, if you have details turned off, the check for matching
will be done only against the file or directory name (since that's
all that is visible).
This "match anywhere on the line" semantic is possible because
SELWILD automatically massages the regular expression you provide to
make any match on the line true. There may be times when you want
to provide very specific regular expression definitions which seek a
match at specific locations. In that case, you can prevent SELWILD
from fiddling with your regular expression, by beginning it with the
" character. SELWILD understands this to mean that your regular
expression is to be treated literally without modification. (It only
throws away this leading " escape character.)
Because regular expressions can get complicated and tedious to type
in, any such expression you use is saved in a history available via
the Wildcard Menu. The menu can be invoked by clicking on its
button, pressing Alt-w, or Alt-Control-Right-Mouse-Button. (Note
that on Win32 you *must* press Alt then Control then
Right-Mouse-Button for this to work. Win32 appears to care deeply
about keystroke order.)
You can also preload that menu with commonly used wildcards by
placing multiple statements like this in your Configuration File:
WILDCARD = some-regular-expression
These will appear in the Wildcard Menu in the order they were
defined. Bear in mind that only the first MAXMENU number of items
will actually appear in the Wildcard Menu. Again, SELWILD will
check the first character of your regular expression and "escape" it
if that character is ".
There is a new debug bit which will display the Wildcard stack as it
changes.
- Advanced Sorting Options
You can now sort by any of the detail columns *whether or not
details are currently displayed*. Shift-F1 sorts by the leftmost
column, Shift-F2 sorts by the second from left column, and so forth.
Shift-F10 selects no sorting which means items will be displayed in
the order they are reported by the operating system. Shift-F11
reverses the sort order, and Shift-F12 toggles whether or not
directories and files should be separated when sorting and
displaying. These sort options are also available via a new Sort
Menu which can be opened by clicking on its menu button or pressing
Alt-s. There is no mouse shortcut for sorting options.
The current sort parameters are displayed on the Titlebar and
the name of the sort key field is automatically adjusted
depending on whether you are in Normal or Drive List View.
You can set your desired default sorting order via three new
options in the Configuration File.
Option Default Possible Values
---------------------------------------------
SORTBYFIELD Name No Sort, Permissions, Links,
Owner, Group, Length,
Time, Name
SORTREVERSE False True, False
SORTSEPARATE True True, False
- Conditional Processing Of Configuration File Statements
It is now possible to include or exclude statements in the
Configuration File based on certain conditions. This makes it easy
to maintain a single such file that works across all the different
operating systems and with many different users.
A Condition Block begins with a Condition Test Statement and ends
with '.endif'. If the Condition Test evaluates to be True, all the
lines up to the matching '.endif' are included in the configuration.
If False, all these lines are ignored. Conditionals may be nested
without limit. 'twander' keeps track of which '.endif' matches which
Condition Test Statement. Like all Configuration File entries,
whitespace is ignored when processing Conditional Statements and you
are free to indent (or not) as you see fit.
Condition Test Statements are one of three types:
#####
# Existential: True if FOO or $FOO are defined
#####
.if [FOO]
...
.endif
.if [$FOO]
...
.endif
#####
# Equality: True if FOO or $FOO are literally
# the same as the test-string
#####
.if [FOO] == test-string
...
.endif
.if [$FOO] == test-string
...
.endif
#####
# Inequality: True if FOO or $FOO are literally
# not the same as the test-string
#####
.if [FOO] != test-string
...
.endif
.if [$FOO] != test-string
...
.endif
Note that the test always depends first on a *variable reference*
([FOO], never just FOO), but that the Right Hand Side of
an in/equality test is just a string comparsion - no variable
expansion is done. This will not work as you might expect:
.if [FOO] == string[BAR]
To make it easy to create conditional blocks based on the type of
system you're running, 'twander' now automatically pre-defines two
variables which provide information about your system:
Variable Name Typical Values
--------------------------------
.OS nt, posix
.PLATFORM freebsd4, linux-i386, win32
Note that these predefined variables also begin with a period to
remind you of their intended role. They will thus also sort first in
the User-Defined Variables section of the Help Menu.
See the example .twander file provided in the distribution for
some extended examples of using conditinals in your Configuration
File.
- The New ".include" Directive
The configuration language now supports a means of including
other files in your configuration. This makes it easy to, say,
have a "standard" configuration that everyone can use as a starting
point like this:
.include /usr/local/etc/.twander.global
# Your configuration lines go here
You may have as many ".include" directives in your Configuration File
as you like. The only requirement is that there be whitespace between
the directive and the filename.
twander 3.0 (2-17-2003):
========================
- The licensing terms have been clarified. Non-Commercial use of the
program is free with a $20 US per user donation recommended.
This fee is mandatory for commercial users.
- A Quick Start introduction to 'twander' is now included in the
distribution. See 'READ-1ST.txt'.
- *MANY* bug fixes and code cleanup including a nasty one with
RH linux that prevented 'twander' from opening the user's
home directory.
- Most program features and options are now settable in the
configuration file AND you can set your default twander command line
arguments in an environment variable called TWANDER.
The priority of options processing, from lowest to highest is:
1) Defaults coded into program
2) Options set in configuration file
3) Options set in environment variable
4) Options set on command line.
- The -b, -f, -n, -w, -s, -x, -y command line options have
been removed because these options are not settable as
options in the configuration file.
- Width/Height now default to 800 and 600 pixels respectively.
Previous versions did not really count pixels correctly.
You can also specify the starting position on screen in pixels.
- You can now include references to any of the variable types
in a manually entered command line. Syntax is the same as for
command definitions in the configuration file.
- Various help menus have been added.
- Command History has been implemented and is available via a new
menu.
- There are now accelerator key and mouse shortcuts for each of the
menus.
- A new "Directory Shortcuts" feature has been added. You can
specify up to 12 directories which will be preloaded into
the Directory Menu (as if you'd already visited them) AND
you can move to each of them via one of the Function keys.
- twander debug facilities have been vastly improved. The -d
command line argument now takes a mandatory "debug level"
as an argument. This is a bitfield (which can be expressed
in either decimal or hex) in which each bit indicates a
kind of degbug output you'd like.
- There is a new Built-In variable called [YESNO:some text]. It
allows you to put a Yes/No popup during command execution.
If the user presses "No", the command is aborted.
- Since Win32 file/directory names are case-insensitive,
twander now sorts them as such. Previously, 'ZEBRA' would
appear before 'echo' in a twander display.
- Most previous error conditions have been changed to warnings so
that the program is more forgiving and will keep running after
such a condition.
- The various interactive popup dialogs allow intra-line editing
with both the local conventions as well as emacs-style key
editing. This was true previously, but was not documented.
- If you are running on Win32 and have Mark Hammond's 'win32all'
extensions installed, a number of Win32-specific features are
enabled:
a) You can now navigate ".." from root or use the Ctrl-k key to
get a Drive List View of all available Win32 drives.
b) The file/directory mode will be displayed showing Win32
attributes.
c) The Win32 user/group names will appear for each displayed
item, instead of "win32user" and "win32group".
- You can now resize fonts while running 'twander' without having to
change the respective configuration file parameters. Two new key
assignments have been defined to increment or decrement font size.
- You can use the CMDSHELL option to define a string that will be
prepended to each manually entered command. The feature is off
by default. If enabled, it can be suppressed by entering "\"
as the first character in the manually entered command. This makes
it easy to create a default visual/GUI context for each command you
enter manually.
- A new "Program Memory" feature is implemented which allows 'twander'
to maintain up to 12 separate, simultaneous clipboard- like
memories. These memories are used to compile names of files and
directories which you would like to subsequently processs. There
are 12 new corresponding Built-In Variables ([MEM1]-[MEM12]) which
allow command definitions to access the contents of the memories
- TundraWare Inc. is now running a 'twander-users' mailing list.
------------------------------------------------------------------------
twander 2.34 (12-23-2002):
===========================
Initial public release of program
tundra