javafx.scene.text.HitInfo Maven / Gradle / Ivy
/*
* Copyright (c) 2010, 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package javafx.scene.text;
import java.text.BreakIterator;
/**
* Represents the hit information in a Text node.
*
* @since 9
*/
public class HitInfo {
private int charIndex;
private boolean leading;
private int insertionIndex;
private String text;
/**
* Create a HitInfo object representing a text index and forward bias.
*
* @param charIndex the character index.
* @param leading whether the hit is on the leading edge of the character. If it is false, it represents the trailing edge.
*/
HitInfo(int charIndex, int insertionIndex, boolean leading, String text) {
this.charIndex = charIndex;
this.leading = leading;
this.insertionIndex = insertionIndex;
this.text = text;
}
/**
* The index of the character which this hit information refers to.
* @return the index of the character which this hit information refers to
*/
public int getCharIndex() { return charIndex; }
/**
* Indicates whether the hit is on the leading edge of the character.
* If it is false, it represents the trailing edge.
* @return if true the hit is on the leading edge of the character, otherwise
* the trailing edge
*/
public boolean isLeading() { return leading; }
private static BreakIterator charIterator = BreakIterator.getCharacterInstance();
/**
* Returns the index of the insertion position.
* @return the index of the insertion position
*/
public int getInsertionIndex() {
if (insertionIndex == -1) {
insertionIndex = charIndex;
if (!leading) {
if (text != null) {
// Skip complex character clusters / ligatures.
int next;
synchronized(charIterator) {
charIterator.setText(text);
next = charIterator.following(insertionIndex);
}
if (next == BreakIterator.DONE) {
insertionIndex += 1;
} else {
insertionIndex = next;
}
} else {
insertionIndex += 1;
}
}
}
return insertionIndex;
}
@Override public String toString() {
return "charIndex: " + charIndex + ", isLeading: " + leading + ", insertionIndex: " + getInsertionIndex();
}
}