CP/M/CPM_CDROM.iso/lambda/soundpot/a/express.lbr/EXPRESS4.DZC/EXPRESS4.DOC

Text File | 1993-10-26 | 11.3 KB | 378 lines

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            EXPRESS - Full Screen Editor                (c)1985 C. & L. Stump
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EDITING COMMANDS
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The following are descriptions of commands that can be executed
while in EXPRESS's edit mode. They are all executed by typing a one or
more character sequence, usually control characters, or function
keys if you have customized the control commands.

Any time a specific control character is mentioned, it will be preceded
by a '^'; thus, ^N means 'control+N'. You should remember that the
<CONTROL> key is similar to the <SHIFT> key; you must hold it down WHILE
YOU TYPE THE OTHER KEY. This should not be confused with the <ESCAPE>
key, which is typed separately from the other character(s) in the
sequence.

If you have not customized the keys, you will notice that some of the
commands are a two character sequence started with a ^U. This is the
'undo' or 'alternate function' key. This was necessary because there are
more editing commands than there are control characters.

For people who have chosen to customize their control character layout
to achieve compatibility with other editors, implement special function
keys on their terminal, or whatever other reason, a space - (____) - has
been provided wherever a specific control character is mentioned. This
will allow you to write in the control character or function key you
have selected for this operation.

The commands will be described in an order that is non-alphabetical,
but more related to the commands' relationships to one another.
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CURSOR CONTROL
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Cursor Left     ^H (Backspace) (____)

Moves the cursor one position to the left non-destructively.

If the cursor is already in the first column of the line, it will be
placed in the last column of the of the preceding line.


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Cursor Right  ^L (____)

Moves the cursor one position to the right non-destructively.

If the cursor is already in the last column of the line, as defined by
the screen width or, if in wrap mode, the current right margin, the
cursor will go to the beginning of the next line.


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Next Tab  ^I (Tab) (____)

Moves the cursor to the next tab stop on the line.

If the cursor is already past the last tab stop on the line, the line is
extended into the next line on the screen and the cursor is moved to the
beginning of this 'continuation line'.

If insert mode is on or if the cursor is moving past the last character
on a line, a tab will be inserted at the cursor position, otherwise the
command just positions the cursor.

If you wish, you can cause the <TAB> key to insert the appropriate
number of spaces instead of a tab character. This is useful when the
file will later be used by a program that does not understand tab
characters (Turbo Pascal, for instance). To 'turn off the tabs', return
to command mode with <ESC>, (______) and enter the command:

    tabs off

After this time, no more tab characters will be entered into the file
(although all existing tab characters will remain).


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Previous Tab  ^U^I (^U Tab) (______)

Moves the cursor to the first tab stop preceding the current
cursor location in the line. This command is always
non-destructive.

If the cursor is at the beginning of the line, the command is
ignored.


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Next Word  ^W (____)

Moves the cursor to the beginning of the next word following the
current cursor location. The beginning of a word is signalled by
either the start of a new line or an non-alphanumeric character
('a'-'z','A'-'Z','0'-'9') preceding an alphanumeric character.

If there are no more words on the current line, the cursor is
moved to the beginning of the next line.


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Previous Word  ^A (____)

Moves the cursor to the beginning of the current word or, if it
is already on the beginning of the current word, to the
beginning of the first word preceding it.

If there are no more words on the line the cursor is moved to
the beginning of the line; if the cursor is already at the
beginning of the line, it is moved to the beginning of the last
word on the line above.


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Indent  ^U^W (______)

Moves the cursor to the next tab stop and sets that column as
the new left margin. Please notice that the new margin is the
next tab stop after the CURRENT LOCATION OF THE CURSOR, not the
current left margin. This command is functionally identical to
using the INDENT command from the command mode.

If the cursor is already in the last column of the line, the
command is ignored.


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Undent  ^U^A (______)

Moves the cursor to the first tab previous to the current cursor
location and sets that column as the new left margin. See the
note for Indent above.

If the cursor is already in the first column then this command
is ignored.


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Start of Line    ^U^H (____)

Moves the cursor to the beginning of the current line.


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End of Line    ^U^L (____)

Moves the cursor to the end of the current line.


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Carriage Return  ^M <CR> (____)

Moves the cursor to the beginning of the next line. If you are
currently in entry mode or if you are at the end of the edit
buffer, a new line is inserted. This command merely positions
the cursor; it does not actually place a ^M in the file, so you
can simply type a carriage return from the middle of a line to
move to the next line, you don't have to worry about going to
the end or beginning of the line first as with some other
editors.

If you wish to break a line in two you may use the 'break line'
command, ^B (____) described later. If you really must have the
carriage return break a line in two then you may set the 'break
line on CR' flag in ECONFIG and the carriage return key will actually
insert a carriage return/linefeed into the file (when entry mode is on).


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Cursor Up  ^K (____)

Moves the cursor up one line. If this operation would cause the
cursor to go off the top of the screen, then it is scrolled one
line towards the beginning of the edit buffer.

If the cursor is already on the first line of the edit buffer
then this command is ignored.


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Cursor Down     ^J (Linefeed) (____)

Moves the cursor down one line. If this would cause the cursor
to go off the bottom of the screen, the screen is scrolled one line
towards the end of the edit buffer.

If the cursor is already on the last line of the edit buffer
then the command is ignored.


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Start of Screen    ^U^K (____)

Moves the cursor to the first line on the screen.


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End of Screen    ^U^J (____)

Moves the cursor to the bottom line of the screen.


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Start of Buffer    ^U^R (____)

Moves the cursor to the first page of the edit buffer.


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End of Buffer    ^U^T (____)

Moves the cursor to the last page of the edit buffer.


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Start of Line/Screen/Buffer     ^^ (____)

Moves the cursor to the beginning of the current line when typed
once. Typed twice, it moves to the beginning of the first line
on the screen. Three times moves to the beginning of the first
line of the edit buffer.

If the cursor is already in the desired position, the command is
ignored.


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End of Line/Screen/Buffer    ^N (____)

Moves the cursor to one position past the last non-space on the
current line when typed once. When typed twice, it moves to the
end of the last line on the screen. If it is typed three times,
it moves the cursor to the end of the last line in the edit
buffer.

If the cursor is already in the desired location, no action is
taken.
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SCROLLING COMMANDS
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Scroll Backward One Line  ^F (____)

Scrolls the screen one line towards the beginning of the edit
buffer; the cursor remains in the same position on the screen.

If the first line of the edit buffer is already on the screen,
the command is ignored.


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Scroll Forward One Line ^G (____)

Scrolls the screen one line towards the end of the edit buffer.
The cursor maintains the same absolute position on the screen.

If less than half of the lines on the screen are actual lines of
the file (as signified by the [EOB] message following the last
line) then the command is ignored.


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Scroll Backward Continuously  ^U^F (______)

Scrolls the screen towards the beginning of the buffer, one line
at a time.

While scrolling is in progress, several keys take on a special
function:

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1.  Typing any digit, 1-9 or 0, will change the auto-scroll
speed to that speed. '1' gives the slowest scroll speed and
'0' gives the fastest. These are arranged in ascending order
across the top of the computer keyboard.

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2.  The minus key (-) changes the direction of the scroll. If
you were scrolling backward, you will begin scrolling
forward, if you were scrolling forward, you will begin
scrolling backward. This key was chosen because it is
usually situated immediately to the right of the '0' key on
the computer keyboard and it also has the meaning of
negate' which is what you are doing - negating the command.

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3.  Any other key will stop the scrolling action and return you
to normal edit mode.

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Scrolling will automatically stop when the beginning of the
buffer is reached.


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Scroll Forward Continuously     ^U^G (______)

Scrolls the screen towards the end of the buffer, one line at a
time.

The scrolling speed of this command can be set from command mode
or while scrolling, just as for the Scroll Backward Continuously
command.

To stop scrolling type any key other than the ones listed in the
Scroll Backward command.

Scrolling stops automatically when the last line of the buffer
is on the screen.


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Center Cursor Line    ^] (____)

Scrolls the line that the cursor is currently on to the middle
of the screen. This is useful for seeing the context in the file
of a word that has just been found using the SEARCH command.

If this command would cause scrolling past the beginning of the
file, as much scrolling is done as possible, then the terminal
beeps.


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Next Page  ^T (____)

Clears the current page from the screen and displays the next 24
lines (or however many lines your terminal can display) on the screen.
If you wish to page rapidly through a file to find a certain section,
you may press the 'next page' key several times; you do not have to wait
for the screen to finish painting. As soon as you type any key, painting
of the screen is temporarily suspended and the new command is executed.

If there are no more lines in the edit buffer past the ones
already displayed, this command takes no action.


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Previous Page  ^R (____)

Clears the current page from the screen and displays the
previous 24 lines (or however many your terminal can display) on
the screen. The same comments about the painting of the screen
given in the Next Page command hold for this command (and all
other commands, for that matter), too.

If there are less than 24 lines preceding the current screen
being displayed, then the first 24 lines of the file are
displayed.