A displaying scanner which draws its output to a Morphic canvas.

	private
	doesDisplaying setFont textColor:

	scanning
	displayLine:offset:leftInRun:

	stop conditions
	cr crossedX endOfRun paddedSpace setStopConditions tab

	accessing	top
	canvas: set the canvas to draw on

	private	top
	doesDisplaying
	setFont Set the font and other emphasis.
	textColor: Overridden in DisplayScanner

	scanning	top
	displayLine:offset:leftInRun: largely copied from DisplayScanner's routine

	stop conditions	top
	cr When a carriage return is encountered, simply increment the pointer into the paragraph.
	crossedX This condition will sometimes be reached 'legally' during display, when, for instance the space that caused the line to wrap actually extends over the right boundary. This character is allowed to display, even though it is technically outside or straddling the clipping ectangle since it is in the normal case not visible and is in any case appropriately clipped by the scanner.
	endOfRun The end of a run in the display case either means that there is actually a change in the style (run code) to be associated with the string or the end of this line has been reached.
	paddedSpace Each space is a stop condition when the alignment is right justified. Padding must be added to the base width of the space according to which space in the line this space is and according to the amount of space that remained at the end of the line when it was composed.
	setStopConditions Set the font and the stop conditions for the current run.
	tab