Page 138	Table of Contents	Index	Page 140
	Chapters
	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 A, B, C, D, E

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CHAPTER 15. EXTENDED STREAM OUTPUT

allocate for the output, in device units. If it is not supplied, the height is computed from the
output.

record-type specifies the class of output record to create to hold the graphical output. The default
is standard-sequence-output-record.

15.4.2 Wrapping of Text Lines

=> stream-end-of-line-action stream [Generic Function]
=> (setf stream-end-of-line-action) action stream [Generic Function]
The end-of-line action controls what happens if the text cursor position moves horizontally out
of the viewport, or if text output reaches the text margin. (By default the text margin is the
width of the viewport, so these are usually the same thing.)

stream-end-of-line-action returns the end-of-line action for the extended output stream
stream. It can be changed by using setf on stream-end-of-line-action.

The end-of-line action is one of:

• :wrap - when doing text output, wrap the text around (that is, break the text line and
  start another line). When setting the cursor position, scroll the window horizontally to
  keep the cursor position inside the viewport. This is the default.
  
  
• :scroll - scroll the window horizontally to keep the cursor position inside the viewport,
  then keep doing the output.
  
  
• :allow - ignore the text margin and do the output on the drawing plane beyond the visible
  part of the viewport.
  

=> with-end-of-line-action (stream action) &body body [Macro]
Temporarily changes stream's end-of-line action for the duration of execution of body. action
must be one of the actions described in stream-end-of-line-action.

The stream argument is not evaluated, and must be a symbol that is bound to a stream. If
stream is t, *standard-output* is used. body may have zero or more declarations as its first
forms.

=> stream-end-of-page-action stream [Generic Function]
=> (setf stream-end-of-page-action) action stream [Generic Function]
The end-of-page action controls what happens if the text cursor position moves vertically out of
the viewport.

stream-end-of-page-action returns the end-of-page action for the extended output stream
stream. It can be changed by using setf on stream-end-of-page-action.

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Page 138	Table of Contents	Index	Page 140
	Chapters
	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 A, B, C, D, E