| An InputMethodHighlight is used to describe the highlight
attributes of text being composed.
The description can be at two levels:
at the abstract level it specifies the conversion state and whether the
text is selected; at the concrete level it specifies style attributes used
to render the highlight.
An InputMethodHighlight must provide the description at the
abstract level; it may or may not provide the description at the concrete
level.
If no concrete style is provided, a renderer should use
java.awt.Toolkit.mapInputMethodHighlight to map to a concrete style.
The abstract description consists of three fields: selected,
state, and variation.
selected indicates whether the text range is the one that the
input method is currently working on, for example, the segment for which
conversion candidates are currently shown in a menu.
state represents the conversion state. State values are defined
by the input method framework and should be distinguished in all
mappings from abstract to concrete styles. Currently defined state values
are raw (unconverted) and converted.
These state values are recommended for use before and after the
main conversion step of text composition, say, before and after kana->kanji
or pinyin->hanzi conversion.
The variation field allows input methods to express additional
information about the conversion results.
InputMethodHighlight instances are typically used as attribute values
returned from AttributedCharacterIterator for the INPUT_METHOD_HIGHLIGHT
attribute. They may be wrapped into
java.text.Annotation Annotation instances to indicate separate text segments.
version:
1.19, 01/23/03
See Also: java.text.AttributedCharacterIterator
since:
1.2 |
