space-width

Arguments: graphical-stream

Returns the pixel width of a space character in the current font of a graphical-stream. If the font is a fixed-width font, then this is of course the width of any character printed to the stream.

The value returned by page-width, left-margin, or right-margin is measured in space widths when the stream-units-p argument is nil.

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Created 2010.1.21.