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If an OpenMath parser provides location information to the
application, it does so by implementing this interface and then
passing an instance to the application using the
handler's setLocator()
method. The application can use the
object to obtain the location of any event
in the source document.
Note that the results returned by the object will be valid only during the scope of each handler method: the application will receive unpredictable results if it attempts to use the locator at any other time.
OpenMath parsers are not required to supply a locator, but they are
strongly encouraged to do so. If the parser supplies a
locator, it must do so before reporting any other parsing events.
If no locator has been set by the time the application receives
the startParse
event, the application should assume that a
locator is not available.
public abstract int getLineNumber()
Note that this is the line position of the first character after the text associated with the event.
public abstract int getColumnNumber()
Note that this is the column number of the first character after the text associated with the event. The first column in a line is position 1.
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