1 package android.text; 2 3 import com.android.tools.layoutlib.annotations.LayoutlibDelegate; 4 5 import java.text.CharacterIterator; 6 import java.util.Arrays; 7 import java.util.Locale; 8 9 import com.ibm.icu.lang.UCharacter; 10 import com.ibm.icu.text.BreakIterator; 11 import com.ibm.icu.util.ULocale; 12 import javax.swing.text.Segment; 13 14 /** 15 * Delegate that provides implementation for native methods in {@link android.text.StaticLayout} 16 * <p/> 17 * Through the layoutlib_create tool, selected methods of StaticLayout have been replaced 18 * by calls to methods of the same name in this delegate class. 19 * 20 */ 21 public class StaticLayout_Delegate { 22 23 /** 24 * Fills the recycle array with positions that are suitable to break the text at. The array 25 * must be terminated by '-1'. 26 */ 27 @LayoutlibDelegate nLineBreakOpportunities(String locale, char[] text, int length, int[] recycle)28 /*package*/ static int[] nLineBreakOpportunities(String locale, char[] text, int length, 29 int[] recycle) { 30 BreakIterator iterator = BreakIterator.getLineInstance(new ULocale(locale)); 31 Segment segment = new Segment(text, 0, length); 32 iterator.setText(segment); 33 if (recycle == null) { 34 // Because 42 is the answer to everything. 35 recycle = new int[42]; 36 } 37 int breakOpp = iterator.first(); 38 recycle[0] = breakOpp; 39 //noinspection ConstantConditions 40 assert BreakIterator.DONE == -1; 41 for (int i = 1; breakOpp != BreakIterator.DONE; ++i) { 42 if (i >= recycle.length) { 43 recycle = doubleSize(recycle); 44 } 45 assert (i < recycle.length); 46 breakOpp = iterator.next(); 47 recycle[i] = breakOpp; 48 } 49 return recycle; 50 } 51 52 private static int[] doubleSize(int[] array) { 53 return Arrays.copyOf(array, array.length * 2); 54 } 55 } 56