A BidiRun represents such a run by storing its essential properties, - * but does not duplicate the characters which form the run. - * - *
The "limit" of the run is the position just after the - * last character, i.e., one more than that position. - * - *
This class has no public constructor, and its members cannot be - * modified by users. - * - * @see com.ibm.icu.text.Bidi - */ -class BidiRun { - - int start; /* first logical position of the run */ - int limit; /* last visual position of the run +1 */ - int insertRemove; /* if >0, flags for inserting LRM/RLM before/after run, - if <0, count of bidi controls within run */ - byte level; - - /* - * Default constructor - * - * Note that members start and limit of a run instance have different - * meanings depending whether the run is part of the runs array of a Bidi - * object, or if it is a reference returned by getVisualRun() or - * getLogicalRun(). - * For a member of the runs array of a Bidi object, - * - start is the first logical position of the run in the source text. - * - limit is one after the last visual position of the run. - * For a reference returned by getLogicalRun() or getVisualRun(), - * - start is the first logical position of the run in the source text. - * - limit is one after the last logical position of the run. - */ - BidiRun() - { - this(0, 0, (byte)0); - } - - /* - * Constructor - */ - BidiRun(int start, int limit, byte embeddingLevel) - { - this.start = start; - this.limit = limit; - this.level = embeddingLevel; - } - - /* - * Copy the content of a BidiRun instance - */ - void copyFrom(BidiRun run) - { - this.start = run.start; - this.limit = run.limit; - this.level = run.level; - this.insertRemove = run.insertRemove; - } - - /** - * Get level of run - */ - byte getEmbeddingLevel() - { - return level; - } - - /** - * Check if run level is even - * @return true if the embedding level of this run is even, i.e. it is a - * left-to-right run. - */ - boolean isEvenRun() - { - return (level & 1) == 0; - } - -} --- /dev/null 2020-01-10 15:57:55.000000000 -0800 +++ new/src/java.base/share/classes/jdk/internal/icu/text/BidiRun.java 2020-01-10 15:57:55.000000000 -0800 @@ -0,0 +1,124 @@ +/* + * Copyright (c) 2009, 2020, 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. + */ +/* + ******************************************************************************* + * (C) Copyright IBM Corp. and others, 1996-2009 - All Rights Reserved * + * * + * The original version of this source code and documentation is copyrighted * + * and owned by IBM, These materials are provided under terms of a License * + * Agreement between IBM and Sun. This technology is protected by multiple * + * US and International patents. This notice and attribution to IBM may not * + * to removed. * + ******************************************************************************* + */ +/* Written by Simon Montagu, Matitiahu Allouche + * (ported from C code written by Markus W. Scherer) + */ + +package jdk.internal.icu.text; + +/** + * A BidiRun represents a sequence of characters at the same embedding level. + * The Bidi algorithm decomposes a piece of text into sequences of characters + * at the same embedding level, each such sequence is called a "run". + * + *
A BidiRun represents such a run by storing its essential properties, + * but does not duplicate the characters which form the run. + * + *
The "limit" of the run is the position just after the + * last character, i.e., one more than that position. + * + *
This class has no public constructor, and its members cannot be + * modified by users. + * + * @see com.ibm.icu.text.Bidi + */ +class BidiRun { + + int start; /* first logical position of the run */ + int limit; /* last visual position of the run +1 */ + int insertRemove; /* if >0, flags for inserting LRM/RLM before/after run, + if <0, count of bidi controls within run */ + byte level; + + /* + * Default constructor + * + * Note that members start and limit of a run instance have different + * meanings depending whether the run is part of the runs array of a Bidi + * object, or if it is a reference returned by getVisualRun() or + * getLogicalRun(). + * For a member of the runs array of a Bidi object, + * - start is the first logical position of the run in the source text. + * - limit is one after the last visual position of the run. + * For a reference returned by getLogicalRun() or getVisualRun(), + * - start is the first logical position of the run in the source text. + * - limit is one after the last logical position of the run. + */ + BidiRun() + { + this(0, 0, (byte)0); + } + + /* + * Constructor + */ + BidiRun(int start, int limit, byte embeddingLevel) + { + this.start = start; + this.limit = limit; + this.level = embeddingLevel; + } + + /* + * Copy the content of a BidiRun instance + */ + void copyFrom(BidiRun run) + { + this.start = run.start; + this.limit = run.limit; + this.level = run.level; + this.insertRemove = run.insertRemove; + } + + /** + * Get level of run + */ + byte getEmbeddingLevel() + { + return level; + } + + /** + * Check if run level is even + * @return true if the embedding level of this run is even, i.e. it is a + * left-to-right run. + */ + boolean isEvenRun() + { + return (level & 1) == 0; + } + +}