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/*
* Copyright (c) 1998, 2016, 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.
*
* 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.
*/
/**
* @test
* @bug 4178145 8144015
*/
/*
* Copyright 1998 IBM Corp. All Rights Reserved.
*/
import java.awt.Color;
import java.awt.Font;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsEnvironment;
import java.awt.font.TextAttribute;
import java.awt.font.TextLayout;
import java.awt.font.TextHitInfo;
import java.awt.font.FontRenderContext;
import java.util.Hashtable;
/**
* This test ensures that TextLayout will not place a caret within
* an Arabic lam-alef ligature, and will correctly caret through
* bidirectional text with numbers.
*/
public class LigatureCaretTest {
public static void main(String[] args) {
testBidiWithNumbers();
testLamAlef();
System.out.println("LigatureCaretTest PASSED");
}
private static final FontRenderContext frc =
new FontRenderContext(null, false, false);
private static Font getFontForText(String s) {
GraphicsEnvironment ge =
GraphicsEnvironment.getLocalGraphicsEnvironment();
Font[] fonts = ge.getAllFonts();
for (Font f : fonts) {
if (f.canDisplayUpTo(s) == -1) {
return f.deriveFont(Font.PLAIN, 24);
}
}
return null;
}
/**
* Caret through text mixed-direction text and check the results.
* If the test fails an Error is thrown.
* @exception an Error is thrown if the test fails
*/
public static void testBidiWithNumbers() {
String bidiWithNumbers = "abc\u05D0\u05D1\u05D2123abc";
Font font = getFontForText(bidiWithNumbers);
if (font == null) {
return;
}
Hashtable map = new Hashtable();
map.put(TextAttribute.FONT, font);
// visual order for the text:
// abc123<gimel><bet><aleph>abc
int[] carets = { 0, 1, 2, 3, 7, 8, 6, 5, 4, 9, 10, 11, 12 };
TextLayout layout = new TextLayout(bidiWithNumbers, map, frc);
// Caret through TextLayout in both directions and check results.
for (int i=0; i < carets.length-1; i++) {
TextHitInfo hit = layout.getNextRightHit(carets[i]);
if (hit.getInsertionIndex() != carets[i+1]) {
throw new Error("right hit failed within layout");
}
}
if (layout.getNextRightHit(carets[carets.length-1]) != null) {
throw new Error("right hit failed at end of layout");
}
for (int i=carets.length-1; i > 0; i--) {
TextHitInfo hit = layout.getNextLeftHit(carets[i]);
if (hit.getInsertionIndex() != carets[i-1]) {
throw new Error("left hit failed within layout");
}
}
if (layout.getNextLeftHit(carets[0]) != null) {
throw new Error("left hit failed at end of layout");
}
}
/**
* Ensure proper careting and hit-testing behavior with
* a lam-alef ligature.
* If the test fails, an Error is thrown.
* @exception an Error is thrown if the test fails
*/
public static void testLamAlef() {
// lam-alef form a mandantory ligature.
final String lamAlef = "\u0644\u0627";
final String ltrText = "abcd";
Font font = getFontForText(lamAlef+ltrText);
if (font == null) {
return;
}
Hashtable map = new Hashtable();
map.put(TextAttribute.FONT, font);
// Create a TextLayout with just a lam-alef sequence. There
// should only be two valid caret positions: one at
// insertion offset 0 and the other at insertion offset 2.
TextLayout layout = new TextLayout(lamAlef, map, frc);
TextHitInfo hit;
hit = layout.getNextLeftHit(0);
if (hit.getInsertionIndex() != 2) {
throw new Error("Left hit failed. Hit:" + hit);
}
hit = layout.getNextRightHit(2);
if (hit.getInsertionIndex() != 0) {
throw new Error("Right hit failed. Hit:" + hit);
}
hit = layout.hitTestChar(layout.getAdvance()/2, 0);
if (hit.getInsertionIndex() != 0 && hit.getInsertionIndex() != 2) {
throw new Error("Hit-test allowed incorrect caret. Hit:" + hit);
}
// Create a TextLayout with some left-to-right text
// before the lam-alef sequence. There should not be
// a caret position between the lam and alef.
layout = new TextLayout(ltrText+lamAlef, map, frc);
final int ltrLen = ltrText.length();
final int layoutLen = layout.getCharacterCount();
for (int i=0; i < ltrLen; i++) {
hit = layout.getNextRightHit(i);
if (hit.getInsertionIndex() != i+1) {
throw new Error("Right hit failed in ltr text.");
}
}
hit = layout.getNextRightHit(ltrLen);
if (layoutLen != hit.getInsertionIndex()) {
throw new Error("Right hit failed at direction boundary.");
}
hit = layout.getNextLeftHit(layoutLen);
if (hit.getInsertionIndex() != ltrLen) {
throw new Error("Left hit failed at end of text.");
}
}
}
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