| /* GENERATED SOURCE. DO NOT MODIFY. */ |
| /* |
| ******************************************************************************* |
| * Copyright (C) 2001-2011, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| ******************************************************************************* |
| */ |
| /* Written by Simon Montagu, Matitiahu Allouche |
| * (ported from C code written by Markus W. Scherer) |
| */ |
| |
| package android.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 <quote>run</quote>. |
| * |
| * <p>A BidiRun represents such a run by storing its essential properties, |
| * but does not duplicate the characters which form the run. |
| * |
| * <p>The "limit" of the run is the position just after the |
| * last character, i.e., one more than that position. |
| * |
| * <p>This class has no public constructor, and its members cannot be |
| * modified by users. |
| * |
| * @see android.icu.text.Bidi |
| * @hide Only a subset of ICU is exposed in Android |
| */ |
| public 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 the first logical position of the run in the source text |
| */ |
| public int getStart() |
| { |
| return start; |
| } |
| |
| /** |
| * Get position of one character after the end of the run in the source text |
| */ |
| public int getLimit() |
| { |
| return limit; |
| } |
| |
| /** |
| * Get length of run |
| */ |
| public int getLength() |
| { |
| return limit - start; |
| } |
| |
| /** |
| * Get level of run |
| */ |
| public byte getEmbeddingLevel() |
| { |
| return level; |
| } |
| |
| /** |
| * Check if run level is odd |
| * @return true if the embedding level of this run is odd, i.e. it is a |
| * right-to-left run. |
| */ |
| public boolean isOddRun() |
| { |
| return (level & 1) == 1; |
| } |
| |
| /** |
| * 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. |
| */ |
| public boolean isEvenRun() |
| { |
| return (level & 1) == 0; |
| } |
| |
| /** |
| * Get direction of run |
| */ |
| public byte getDirection() |
| { |
| return (byte)(level & 1); |
| } |
| |
| /** |
| * String to display run |
| */ |
| public String toString() |
| { |
| return "BidiRun " + start + " - " + limit + " @ " + level; |
| } |
| } |