Eclipse Plug-in Developer Guide (Galileo) - ICharacterPairMatcher (Eclipse Platform API Specification)

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Release 3.5

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org.eclipse.jface.text.source
Interface ICharacterPairMatcher

All Known Implementing Classes:: DefaultCharacterPairMatcher

public interface ICharacterPairMatcher

A character pair matcher finds to a character at a certain document offset the matching peer character. It is the matchers responsibility to define the concepts of "matching" and "peer". The matching process starts at a given offset. Starting of this offset, the matcher chooses a character close to this offset. The anchor defines whether the chosen character is left or right of the initial offset. The matcher then searches for the matching peer character of the chosen character and if it finds one, delivers the minimal region of the document that contains both characters.

Since:: 2.1

Field Summary

static int LEFT
          Indicates the anchor value "left".

static int RIGHT
          Indicates the anchor value "right".

Method Summary

void clear ()
          Clears this pair matcher.

void dispose ()
          Disposes this pair matcher.

int getAnchor ()
          Returns the anchor for the region of the matching peer characters.

IRegion match ( IDocument iDocument, int i)
          Starting at the given offset, the matcher chooses a character close to this offset.

Field Detail

RIGHT

static final int RIGHT

Indicates the anchor value "right".

See Also:: Constant Field Values

LEFT

static final int LEFT

Indicates the anchor value "left".

See Also:: Constant Field Values

Method Detail

dispose

void dispose()

Disposes this pair matcher.

clear

void clear()

Clears this pair matcher. I.e. the matcher throws away all state it might remember and prepares itself for a new call of the match method.

match


IRegion match(
IDocument iDocument,
              int i)

Starting at the given offset, the matcher chooses a character close to this offset. The matcher then searches for the matching peer character of the chosen character and if it finds one, returns the minimal region of the document that contains both characters. It returns null if there is no peer character.

Parameters:: iDocument - the document to work on; i - the start offset
Returns:: the minimal region containing the peer characters

getAnchor

int getAnchor()

Returns the anchor for the region of the matching peer characters. The anchor says whether the character that has been chosen to search for its peer character has been left or right of the initial offset.

Returns:: RIGHT or LEFT