ACME(1) General Commands Manual ACME(1)
NAME
acme, win, awd - interactive text windows
SYNOPSIS
acme [ -f varfont ] [ -F fixfont ] [ -c ncol ] [ -b ] [ -l file | file ... ]
win [ command ]
awd [ label ]
DESCRIPTION
Acme manages windows of text that may be edited interactively or by external programs. The interactive interface uses the keyboard and
mouse; external programs use a set of files served by acme; these are discussed in acme(4).
Any named files are read into acme windows before acme accepts input. With the -l option, the state of the entire system is loaded from
file, which should have been created by a Dump command (q.v.), and subsequent file names are ignored. Plain files display as text; direc-
tories display as columnated lists of the names of their components, as in ls -p directory|mc except that the names of subdirectories have
a slash appended.
The -f (-F) option sets the default variable-pitch (fixed-pitch) font; the default is /lib/font/bit/lucidasans/euro.8.font (.../lucm/uni-
code.9.font). Tab intervals are set to the width of 4 numeral zeros in the variable-pitch font.
Windows
Acme windows are in two parts: a one-line tag above a multi-line body. The body typically contains an image of a file, as in sam(1), or
the output of a program, as in an 81/2(1) window. The tag contains a number of blank-separated words, followed by a vertical bar charac-
ter, followed by anything. The first word is the name of the window, typically the name of the associated file or directory, and the other
words are commands available in that window. Any text may be added after the bar; examples are strings to search for or commands to exe-
cute in that window. Changes to the text left of the bar will be ignored, unless the result is to change the name of the window.
If a window holds a directory, the name (first word of the tag) will end with a slash.
Scrolling
Each window has a scroll bar to the left of the body. The scroll bar behaves much as in sam(1) or 81/2(1) except that scrolling occurs
when the button is pressed, rather than released, and continues as long as the mouse button is held down in the scroll bar. For example,
to scroll slowly through a file, hold button 3 down near the top of the scroll bar. Moving the mouse down the scroll bar speeds up the
rate of scrolling.
Layout
Acme windows are arranged in columns. By default, it creates two columns when starting; this can be overridden with the -c option. Place-
ment is automatic but may be adjusted using the layout box in the upper left corner of each window and column. Pressing and holding any
mouse button in the box drags the associated window or column. For windows, just clicking in the layout box grows the window in place:
button 1 grows it a little, button 2 grows it as much as it can, still leaving all other tags in that column visible, and button 3 takes
over the column completely, temporarily hiding other windows in the column. (They will return en masse if any of them needs attention.)
The layout box in a window is normally white; when it is black in the center, it records that the file is `dirty': Acme believes it is mod-
ified from its original contents.
Tags exist at the top of each column and across the whole display. Acme pre-loads them with useful commands. Also, the tag across the top
maintains a list of executing long-running commands.
Typing
The behavior of typed text is similar to that in 81/2(1) except that the characters are delivered to the tag or body under the mouse; there
is no `click to type'. (The experimental option -b causes typing to go to the most recently clicked-at or made window.) The usual
backspacing conventions apply. As in sam(1) but not 81/2, the ESC key selects the text typed since the last mouse action, a feature par-
ticularly useful when executing commands. A side effect is that typing ESC with text already selected is identical to a Cut command
(q.v.).
Most text, including the names of windows, may be edited uniformly. The only exception is that the command names to the left of the bar in
a tag are maintained automatically; changes to them are repaired by acme.
Directory context
Each window's tag names a directory: explicitly if the window holds a directory; implicitly if it holds a regular file (e.g. the directory
/adm if the window holds /adm/users). This directory provides a context for interpreting file names in that window. For example, the
string users in a window labeled /adm/ or /adm/keys will be interpreted as the file name /adm/users. The directory is defined purely tex-
tually, so it can be a non-existent directory or a real directory associated with a non-existent file (e.g. /adm/not-a-file). File names
beginning with a slash are assumed to be absolute file names.
Errors
Windows whose names begin with - or + conventionally hold diagnostics and other data not directly associated with files. A window labeled
+Errors receives all diagnostics produced by acme itself. Diagnostics from commands run by acme appear in a window named directory/+Errors
where directory is identified by the context of the command. These error windows are created when needed.
Mouse button 1
Mouse button 1 selects text just as in sam(1) or 81/2(1), including the usual double-clicking conventions.
Mouse button 2
By an action similar to selecting text with button 1, button 2 indicates text to execute as a command. If the indicated text has multiple
white-space-separated words, the first is the command name and the second and subsequent are its arguments. If button 2 is
`clicked'--indicates a null string--acme expands the indicated text to find a command to run: if the click is within button-1-selected
text, acme takes that selection as the command; otherwise it takes the largest string of valid file name characters containing the click.
Valid file name characters are alphanumerics and _ . - + /. This behavior is similar to double-clicking with button 1 but, because a null
command is meaningless, only a single click is required.
Some commands, all by convention starting with a capital letter, are built-ins that are executed directly by acme:
Cut Delete most recently selected text and place in snarf buffer.
Del Delete window. If window is dirty, instead print a warning; a second Del will succeed.
Delcol Delete column and all its windows, after checking that windows are not dirty.
Delete Delete window without checking for dirtiness.
Dump Write the state of acme to the file name, if specified, or $home/acme.dump by default.
Exit Exit acme after checking that windows are not dirty.
Font With no arguments, change the font of the associated window from fixed-spaced to proportional-spaced or vice versa. Given a file
name argument, change the font of the window to that stored in the named file. If the file name argument is prefixed by var (fix),
also set the default proportional-spaced (fixed-spaced) font for future use to that font. Other existing windows are unaffected.
Get Load file into window, replacing previous contents (after checking for dirtiness as in Del). With no argument, use the existing
file name of the window. Given an argument, use that file but do not change the window's file name.
ID Print window ID number (q.v.).
Incl When opening `include' files (those enclosed in <>) with button 3, acme searches in directories /$objtype/include and /sys/include
and, for alef(1) programs, /sys/include/alef. Incl adds its arguments to a supplementary list of include directories, analogous to
the -I option to the compilers. This list is per-window and is inherited when windows are created by actions in that window, so
Incl is most usefully applied to a directory containing relevant source. With no arguments, Incl prints the supplementary list.
Kill Send a kill note to acme-initiated commands named as arguments.
Local When prefixed to a command run the command in the same file name space and environment variable group as acme. The environment of
the command is restricted but is sufficient to run bind(1), 9fs (see srv(4)), import(4), etc., and to set environment variables such
as $objtype.
Load Restore the state of acme from a file (default $home/acme.dump) created by the Dump command.
Look Search in body for occurrence of literal text indicated by the argument or, if none is given, by the selected text in the body.
New Make new window. With arguments, load the named files into windows.
Newcol Make new column.
Paste Replace most recently selected text with contents of snarf buffer.
Put Write window to the named file. With no argument, write to the file named in the tag of the window.
Putall Write all dirty windows whose names indicate existing regular files.
Redo Complement of Undo.
Send Append selected text or snarf buffer to end of body; used mainly with win.
Snarf Place selected text in snarf buffer.
Sort Arrange the windows in the column from top to bottom in lexicographical order based on their names.
Undo Undo last textual change or set of changes.
Zerox Create a copy of the window containing most recently selected text.
A common place to store text for commands is in the tag; in fact acme maintains a set of commands appropriate to the state of the window to
the left of the bar in the tag.
If the text indicated with button 2 is not a recognized built-in, it is executed as a shell command. For example, indicating date with
button 2 runs date(1). The standard and error outputs of commands are sent to the error window associated with the directory from which
the command was run, which will be created if necessary. For example, in a window /adm/users executing pwd will produce the output /adm in
a (possibly newly-created) window labeled /adm/+Errors; in a window containing /sys/src/cmd/sam/sam.c executing mk will run mk(1) in
/sys/src/cmd/sam, producing output in a window labeled /sys/src/cmd/sam/+Errors.
Mouse button 3
Pointing at text with button 3 instructs acme to locate or acquire the file, string, etc. described by the indicated text and its context.
This description follows the actions taken when button 3 is released after sweeping out some text. In the description, text refers to the
text of the original sweep or, if it was null, the result of applying the same expansion rules that apply to button 2 actions.
If the text names an existing window, acme moves the mouse cursor to the selected text in the body of that window. If the text names an
existing file with no associated window, acme loads the file into a new window and moves the mouse there. If the text is a file name con-
tained in angle brackets, acme loads the indicated include file from the directory appropriate to the suffix of the file name of the window
holding the text. (The Incl command adds directories to the standard list.)
If the text begins with a colon, it is taken to be an address, in the style of sam(1), within the body of the window containing the text.
The address is evaluated, the resulting text highlighted, and the mouse moved to it. Thus, in acme, one must type :/regexp or :127 not
just /regexp or 127. (There is an easier way to locate literal text; see below.)
If the text is a file name followed by a colon and an address, acme loads the file and evaluates the address. For example, clicking button
3 anywhere in the text file.c:27 will open file.c, select line 27, and put the mouse at the beginning of the line. The rules about Error
files, directories, and so on all combine to make this an efficient way to investigate errors from compilers, etc.
If the text is not an address or file, it is taken to be literal text, which is then searched for in the body of the window in which button
3 was clicked. If a match is found, it is selected and the mouse is moved there. Thus, to search for occurrences of a word in a file,
just click button 3 on the word. Because of the rule of using the selection as the button 3 action, subsequent clicks will find subsequent
occurrences without moving the mouse.
In all these actions, the mouse motion is not done if the text is a null string within a non-null selected string in the tag, so that (for
example) complex regular expressions may be selected and applied repeatedly to the body by just clicking button 3 over them.
Chords of mouse buttons
Several operations are bound to multiple-button actions. After selecting text, with button 1 still down, pressing button 2 executes Cut
and button 3 executes Paste. After clicking one button, the other undoes the first; thus (while holding down button 1) 2 followed by 3 is
a Snarf that leaves the file undirtied; 3 followed by 2 is a no-op. These actions also apply to text selected by double-clicking because
the double-click expansion is made when the second click starts, not when it ends.
Commands may be given extra arguments by a mouse chord with buttons 2 and 1. While holding down button 2 on text to be executed as a com-
mand, clicking button 1 appends the text last pointed to by button 1 as a distinct final argument. For example, to search for literal text
one may execute Look text with button 2 or instead point at text with button 1 in any window, release button 1, then execute Look, clicking
button 1 while 2 is held down.
When an external command (e.g. echo(1)) is executed this way, the extra argument is passed as expected and an environment variable
$acmeaddr is created that holds, in the form interpreted by button 3, the fully-qualified address of the extra argument.
Support programs
Win creates a new acme window and runs a command (default /bin/rc) in it, turning the window into something analogous to an 81/2(1) window.
Executing text in a win window with button 2 is similar to using Send.
Awd loads the tag line of its window with the directory in which it's running, suffixed -label (default rc); it is intended to be executed
by a cd function for use in win windows. An example definition is
fn cd { builtin cd $1 && awd $sysname }
Applications and guide files
In the directory /acme live several subdirectories, each corresponding to a program or set of related programs that employ acme's user
interface. Each subdirectory includes source, binaries, and a readme file for further information. It also includes a guide, a text file
holding sample commands to invoke the programs. The idea is to find an example in the guide that best matches the job at hand, edit it to
suit, and execute it.
Whenever a command is executed by acme, the default search path includes the directory of the window containing the command and its subdi-
rectory $cputype. The program directories in /acme contain appropriately labeled subdirectories of binaries, so commands named in the
guide files will be found automatically when run. Also, acme binds the directories /acme/bin and /acme/bin/$cputype to the end of /bin
when it starts; this is where acme-specific programs such as win and awd reside.
FILES
$home/acme.dump
default file for Dump and Load; also where state is written if acme dies or is killed unexpectedly, e.g. by deleting its window.
/acme/*/guide
template files for applications
/acme/*/readme
informal documentation for applications
/acme/*/src
source for applications
/acme/*/mips
MIPS-specific binaries for applications
SOURCE
/sys/src/cmd/acme
/acme/bin/src/win.l
/sys/src/cmd/awd.c
SEE ALSO
acme(4)
Rob Pike, Acme: A User Interface for Programmers.
BUGS
Because of a bug in 81/2(1), when returning to the acme window after working in another, acme may not know the correct mouse position until
a button is clicked.
With the -l option or Load command, the recreation of windows under control of external programs such as win is just to rerun the command;
information may be lost.
ACME(1)