32.1. Random Screen Access
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## 32.1. Random Screen Access

### Platform Dependent: UNIX, Win32 platforms only.

`(`SCREEN:MAKE-WINDOW`)`
  returns a WINDOW-STREAM. As long as this stream is open, the terminal is in cbreak/noecho mode. `*TERMINAL-IO*` should not be used for input or output during this time. (Use `EXT:WITH-KEYBOARD` and `EXT:*KEYBOARD-INPUT*` instead.)
`(`SCREEN:WITH-WINDOW` . `body`)`
  binds `SCREEN:*WINDOW*` to a WINDOW-STREAM and executes `body`. The stream is guaranteed to be closed when the body is left. During its execution, `*TERMINAL-IO*` should not be used, as above.
`(`SCREEN:WINDOW-SIZE` `window-stream`)`
  returns the window's size, as two values: height (= ymax+1) and width (= xmax+1).
`(`SCREEN:WINDOW-CURSOR-POSITION` `window-stream`)`
  returns the position of the cursor in the window, as two values: line (≥0, ≤ymax, 0 means top), column (≥0, ≤xmax, 0 means left margin).
`(`SCREEN:SET-WINDOW-CURSOR-POSITION` `window-stream` `line` `column`)`
  sets the position of the cursor in the window.
`(`SCREEN:CLEAR-WINDOW` `window-stream`)`
  clears the window's contents and puts the cursor in the upper left corner.
`(`SCREEN:CLEAR-WINDOW-TO-EOT` `window-stream`)`
  clears the window's contents from the cursor position to the end of window.
`(`SCREEN:CLEAR-WINDOW-TO-EOL` `window-stream`)`
  clears the window's contents from the cursor position to the end of line.
`(`SCREEN:DELETE-WINDOW-LINE` `window-stream`)`
  removes the cursor's line, moves the lines below it up by one line and clears the window's last line.
`(`SCREEN:INSERT-WINDOW-LINE` `window-stream`)`
  inserts a line at the cursor's line, moving the lines below it down by one line.
`(`SCREEN:HIGHLIGHT-ON` `window-stream`)`
  switches highlighted output on.
`(`SCREEN:HIGHLIGHT-OFF` `window-stream`)`
  switches highlighted output off.
`(`SCREEN:WINDOW-CURSOR-ON` `window-stream`)`
  makes the cursor visible, a cursor block in most implementations.
`(`SCREEN:WINDOW-CURSOR-OFF` `window-stream`)`
  makes the cursor invisible, in implementations where this is possible.

| These notes document CLISP version 2.45 | Last modified: 2008-05-14

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