| /* |
| * Copyright (C) 2006 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.text; |
| |
| import android.annotation.Nullable; |
| import android.content.res.Resources; |
| import android.icu.util.ULocale; |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| import android.os.SystemProperties; |
| import android.provider.Settings; |
| import android.text.style.AbsoluteSizeSpan; |
| import android.text.style.AlignmentSpan; |
| import android.text.style.BackgroundColorSpan; |
| import android.text.style.BulletSpan; |
| import android.text.style.CharacterStyle; |
| import android.text.style.EasyEditSpan; |
| import android.text.style.ForegroundColorSpan; |
| import android.text.style.LeadingMarginSpan; |
| import android.text.style.LocaleSpan; |
| import android.text.style.MetricAffectingSpan; |
| import android.text.style.QuoteSpan; |
| import android.text.style.RelativeSizeSpan; |
| import android.text.style.ReplacementSpan; |
| import android.text.style.ScaleXSpan; |
| import android.text.style.SpellCheckSpan; |
| import android.text.style.StrikethroughSpan; |
| import android.text.style.StyleSpan; |
| import android.text.style.SubscriptSpan; |
| import android.text.style.SuggestionRangeSpan; |
| import android.text.style.SuggestionSpan; |
| import android.text.style.SuperscriptSpan; |
| import android.text.style.TextAppearanceSpan; |
| import android.text.style.TtsSpan; |
| import android.text.style.TypefaceSpan; |
| import android.text.style.URLSpan; |
| import android.text.style.UnderlineSpan; |
| import android.util.Log; |
| import android.util.Printer; |
| import android.view.View; |
| |
| import com.android.internal.R; |
| import com.android.internal.util.ArrayUtils; |
| |
| import libcore.icu.ICU; |
| |
| import java.lang.reflect.Array; |
| import java.util.Iterator; |
| import java.util.Locale; |
| import java.util.regex.Pattern; |
| |
| public class TextUtils { |
| private static final String TAG = "TextUtils"; |
| |
| /* package */ static final char[] ELLIPSIS_NORMAL = { '\u2026' }; // this is "..." |
| private static final String ELLIPSIS_STRING = new String(ELLIPSIS_NORMAL); |
| |
| /* package */ static final char[] ELLIPSIS_TWO_DOTS = { '\u2025' }; // this is ".." |
| private static final String ELLIPSIS_TWO_DOTS_STRING = new String(ELLIPSIS_TWO_DOTS); |
| |
| private TextUtils() { /* cannot be instantiated */ } |
| |
| public static void getChars(CharSequence s, int start, int end, |
| char[] dest, int destoff) { |
| Class<? extends CharSequence> c = s.getClass(); |
| |
| if (c == String.class) |
| ((String) s).getChars(start, end, dest, destoff); |
| else if (c == StringBuffer.class) |
| ((StringBuffer) s).getChars(start, end, dest, destoff); |
| else if (c == StringBuilder.class) |
| ((StringBuilder) s).getChars(start, end, dest, destoff); |
| else if (s instanceof GetChars) |
| ((GetChars) s).getChars(start, end, dest, destoff); |
| else { |
| for (int i = start; i < end; i++) |
| dest[destoff++] = s.charAt(i); |
| } |
| } |
| |
| public static int indexOf(CharSequence s, char ch) { |
| return indexOf(s, ch, 0); |
| } |
| |
| public static int indexOf(CharSequence s, char ch, int start) { |
| Class<? extends CharSequence> c = s.getClass(); |
| |
| if (c == String.class) |
| return ((String) s).indexOf(ch, start); |
| |
| return indexOf(s, ch, start, s.length()); |
| } |
| |
| public static int indexOf(CharSequence s, char ch, int start, int end) { |
| Class<? extends CharSequence> c = s.getClass(); |
| |
| if (s instanceof GetChars || c == StringBuffer.class || |
| c == StringBuilder.class || c == String.class) { |
| final int INDEX_INCREMENT = 500; |
| char[] temp = obtain(INDEX_INCREMENT); |
| |
| while (start < end) { |
| int segend = start + INDEX_INCREMENT; |
| if (segend > end) |
| segend = end; |
| |
| getChars(s, start, segend, temp, 0); |
| |
| int count = segend - start; |
| for (int i = 0; i < count; i++) { |
| if (temp[i] == ch) { |
| recycle(temp); |
| return i + start; |
| } |
| } |
| |
| start = segend; |
| } |
| |
| recycle(temp); |
| return -1; |
| } |
| |
| for (int i = start; i < end; i++) |
| if (s.charAt(i) == ch) |
| return i; |
| |
| return -1; |
| } |
| |
| public static int lastIndexOf(CharSequence s, char ch) { |
| return lastIndexOf(s, ch, s.length() - 1); |
| } |
| |
| public static int lastIndexOf(CharSequence s, char ch, int last) { |
| Class<? extends CharSequence> c = s.getClass(); |
| |
| if (c == String.class) |
| return ((String) s).lastIndexOf(ch, last); |
| |
| return lastIndexOf(s, ch, 0, last); |
| } |
| |
| public static int lastIndexOf(CharSequence s, char ch, |
| int start, int last) { |
| if (last < 0) |
| return -1; |
| if (last >= s.length()) |
| last = s.length() - 1; |
| |
| int end = last + 1; |
| |
| Class<? extends CharSequence> c = s.getClass(); |
| |
| if (s instanceof GetChars || c == StringBuffer.class || |
| c == StringBuilder.class || c == String.class) { |
| final int INDEX_INCREMENT = 500; |
| char[] temp = obtain(INDEX_INCREMENT); |
| |
| while (start < end) { |
| int segstart = end - INDEX_INCREMENT; |
| if (segstart < start) |
| segstart = start; |
| |
| getChars(s, segstart, end, temp, 0); |
| |
| int count = end - segstart; |
| for (int i = count - 1; i >= 0; i--) { |
| if (temp[i] == ch) { |
| recycle(temp); |
| return i + segstart; |
| } |
| } |
| |
| end = segstart; |
| } |
| |
| recycle(temp); |
| return -1; |
| } |
| |
| for (int i = end - 1; i >= start; i--) |
| if (s.charAt(i) == ch) |
| return i; |
| |
| return -1; |
| } |
| |
| public static int indexOf(CharSequence s, CharSequence needle) { |
| return indexOf(s, needle, 0, s.length()); |
| } |
| |
| public static int indexOf(CharSequence s, CharSequence needle, int start) { |
| return indexOf(s, needle, start, s.length()); |
| } |
| |
| public static int indexOf(CharSequence s, CharSequence needle, |
| int start, int end) { |
| int nlen = needle.length(); |
| if (nlen == 0) |
| return start; |
| |
| char c = needle.charAt(0); |
| |
| for (;;) { |
| start = indexOf(s, c, start); |
| if (start > end - nlen) { |
| break; |
| } |
| |
| if (start < 0) { |
| return -1; |
| } |
| |
| if (regionMatches(s, start, needle, 0, nlen)) { |
| return start; |
| } |
| |
| start++; |
| } |
| return -1; |
| } |
| |
| public static boolean regionMatches(CharSequence one, int toffset, |
| CharSequence two, int ooffset, |
| int len) { |
| int tempLen = 2 * len; |
| if (tempLen < len) { |
| // Integer overflow; len is unreasonably large |
| throw new IndexOutOfBoundsException(); |
| } |
| char[] temp = obtain(tempLen); |
| |
| getChars(one, toffset, toffset + len, temp, 0); |
| getChars(two, ooffset, ooffset + len, temp, len); |
| |
| boolean match = true; |
| for (int i = 0; i < len; i++) { |
| if (temp[i] != temp[i + len]) { |
| match = false; |
| break; |
| } |
| } |
| |
| recycle(temp); |
| return match; |
| } |
| |
| /** |
| * Create a new String object containing the given range of characters |
| * from the source string. This is different than simply calling |
| * {@link CharSequence#subSequence(int, int) CharSequence.subSequence} |
| * in that it does not preserve any style runs in the source sequence, |
| * allowing a more efficient implementation. |
| */ |
| public static String substring(CharSequence source, int start, int end) { |
| if (source instanceof String) |
| return ((String) source).substring(start, end); |
| if (source instanceof StringBuilder) |
| return ((StringBuilder) source).substring(start, end); |
| if (source instanceof StringBuffer) |
| return ((StringBuffer) source).substring(start, end); |
| |
| char[] temp = obtain(end - start); |
| getChars(source, start, end, temp, 0); |
| String ret = new String(temp, 0, end - start); |
| recycle(temp); |
| |
| return ret; |
| } |
| |
| /** |
| * Returns a string containing the tokens joined by delimiters. |
| * @param tokens an array objects to be joined. Strings will be formed from |
| * the objects by calling object.toString(). |
| */ |
| public static String join(CharSequence delimiter, Object[] tokens) { |
| StringBuilder sb = new StringBuilder(); |
| boolean firstTime = true; |
| for (Object token: tokens) { |
| if (firstTime) { |
| firstTime = false; |
| } else { |
| sb.append(delimiter); |
| } |
| sb.append(token); |
| } |
| return sb.toString(); |
| } |
| |
| /** |
| * Returns a string containing the tokens joined by delimiters. |
| * @param tokens an array objects to be joined. Strings will be formed from |
| * the objects by calling object.toString(). |
| */ |
| public static String join(CharSequence delimiter, Iterable tokens) { |
| StringBuilder sb = new StringBuilder(); |
| boolean firstTime = true; |
| for (Object token: tokens) { |
| if (firstTime) { |
| firstTime = false; |
| } else { |
| sb.append(delimiter); |
| } |
| sb.append(token); |
| } |
| return sb.toString(); |
| } |
| |
| /** |
| * String.split() returns [''] when the string to be split is empty. This returns []. This does |
| * not remove any empty strings from the result. For example split("a,", "," ) returns {"a", ""}. |
| * |
| * @param text the string to split |
| * @param expression the regular expression to match |
| * @return an array of strings. The array will be empty if text is empty |
| * |
| * @throws NullPointerException if expression or text is null |
| */ |
| public static String[] split(String text, String expression) { |
| if (text.length() == 0) { |
| return EMPTY_STRING_ARRAY; |
| } else { |
| return text.split(expression, -1); |
| } |
| } |
| |
| /** |
| * Splits a string on a pattern. String.split() returns [''] when the string to be |
| * split is empty. This returns []. This does not remove any empty strings from the result. |
| * @param text the string to split |
| * @param pattern the regular expression to match |
| * @return an array of strings. The array will be empty if text is empty |
| * |
| * @throws NullPointerException if expression or text is null |
| */ |
| public static String[] split(String text, Pattern pattern) { |
| if (text.length() == 0) { |
| return EMPTY_STRING_ARRAY; |
| } else { |
| return pattern.split(text, -1); |
| } |
| } |
| |
| /** |
| * An interface for splitting strings according to rules that are opaque to the user of this |
| * interface. This also has less overhead than split, which uses regular expressions and |
| * allocates an array to hold the results. |
| * |
| * <p>The most efficient way to use this class is: |
| * |
| * <pre> |
| * // Once |
| * TextUtils.StringSplitter splitter = new TextUtils.SimpleStringSplitter(delimiter); |
| * |
| * // Once per string to split |
| * splitter.setString(string); |
| * for (String s : splitter) { |
| * ... |
| * } |
| * </pre> |
| */ |
| public interface StringSplitter extends Iterable<String> { |
| public void setString(String string); |
| } |
| |
| /** |
| * A simple string splitter. |
| * |
| * <p>If the final character in the string to split is the delimiter then no empty string will |
| * be returned for the empty string after that delimeter. That is, splitting <tt>"a,b,"</tt> on |
| * comma will return <tt>"a", "b"</tt>, not <tt>"a", "b", ""</tt>. |
| */ |
| public static class SimpleStringSplitter implements StringSplitter, Iterator<String> { |
| private String mString; |
| private char mDelimiter; |
| private int mPosition; |
| private int mLength; |
| |
| /** |
| * Initializes the splitter. setString may be called later. |
| * @param delimiter the delimeter on which to split |
| */ |
| public SimpleStringSplitter(char delimiter) { |
| mDelimiter = delimiter; |
| } |
| |
| /** |
| * Sets the string to split |
| * @param string the string to split |
| */ |
| public void setString(String string) { |
| mString = string; |
| mPosition = 0; |
| mLength = mString.length(); |
| } |
| |
| public Iterator<String> iterator() { |
| return this; |
| } |
| |
| public boolean hasNext() { |
| return mPosition < mLength; |
| } |
| |
| public String next() { |
| int end = mString.indexOf(mDelimiter, mPosition); |
| if (end == -1) { |
| end = mLength; |
| } |
| String nextString = mString.substring(mPosition, end); |
| mPosition = end + 1; // Skip the delimiter. |
| return nextString; |
| } |
| |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| |
| public static CharSequence stringOrSpannedString(CharSequence source) { |
| if (source == null) |
| return null; |
| if (source instanceof SpannedString) |
| return source; |
| if (source instanceof Spanned) |
| return new SpannedString(source); |
| |
| return source.toString(); |
| } |
| |
| /** |
| * Returns true if the string is null or 0-length. |
| * @param str the string to be examined |
| * @return true if str is null or zero length |
| */ |
| public static boolean isEmpty(@Nullable CharSequence str) { |
| if (str == null || str.length() == 0) |
| return true; |
| else |
| return false; |
| } |
| |
| /** {@hide} */ |
| public static String nullIfEmpty(@Nullable String str) { |
| return isEmpty(str) ? null : str; |
| } |
| |
| /** |
| * Returns the length that the specified CharSequence would have if |
| * spaces and ASCII control characters were trimmed from the start and end, |
| * as by {@link String#trim}. |
| */ |
| public static int getTrimmedLength(CharSequence s) { |
| int len = s.length(); |
| |
| int start = 0; |
| while (start < len && s.charAt(start) <= ' ') { |
| start++; |
| } |
| |
| int end = len; |
| while (end > start && s.charAt(end - 1) <= ' ') { |
| end--; |
| } |
| |
| return end - start; |
| } |
| |
| /** |
| * Returns true if a and b are equal, including if they are both null. |
| * <p><i>Note: In platform versions 1.1 and earlier, this method only worked well if |
| * both the arguments were instances of String.</i></p> |
| * @param a first CharSequence to check |
| * @param b second CharSequence to check |
| * @return true if a and b are equal |
| */ |
| public static boolean equals(CharSequence a, CharSequence b) { |
| if (a == b) return true; |
| int length; |
| if (a != null && b != null && (length = a.length()) == b.length()) { |
| if (a instanceof String && b instanceof String) { |
| return a.equals(b); |
| } else { |
| for (int i = 0; i < length; i++) { |
| if (a.charAt(i) != b.charAt(i)) return false; |
| } |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /* |
| * @deprecated |
| * Do not use. This function only reverses individual {@code char}s and not their associated |
| * spans. It doesn't support surrogate pairs (that correspond to non-BMP code points), |
| * combining sequences or conjuncts either. |
| */ |
| @Deprecated |
| public static CharSequence getReverse(CharSequence source, |
| int start, int end) { |
| return new Reverser(source, start, end); |
| } |
| |
| private static class Reverser |
| implements CharSequence, GetChars |
| { |
| public Reverser(CharSequence source, int start, int end) { |
| mSource = source; |
| mStart = start; |
| mEnd = end; |
| } |
| |
| public int length() { |
| return mEnd - mStart; |
| } |
| |
| public CharSequence subSequence(int start, int end) { |
| char[] buf = new char[end - start]; |
| |
| getChars(start, end, buf, 0); |
| return new String(buf); |
| } |
| |
| @Override |
| public String toString() { |
| return subSequence(0, length()).toString(); |
| } |
| |
| public char charAt(int off) { |
| return AndroidCharacter.getMirror(mSource.charAt(mEnd - 1 - off)); |
| } |
| |
| public void getChars(int start, int end, char[] dest, int destoff) { |
| TextUtils.getChars(mSource, start + mStart, end + mStart, |
| dest, destoff); |
| AndroidCharacter.mirror(dest, 0, end - start); |
| |
| int len = end - start; |
| int n = (end - start) / 2; |
| for (int i = 0; i < n; i++) { |
| char tmp = dest[destoff + i]; |
| |
| dest[destoff + i] = dest[destoff + len - i - 1]; |
| dest[destoff + len - i - 1] = tmp; |
| } |
| } |
| |
| private CharSequence mSource; |
| private int mStart; |
| private int mEnd; |
| } |
| |
| /** @hide */ |
| public static final int ALIGNMENT_SPAN = 1; |
| /** @hide */ |
| public static final int FIRST_SPAN = ALIGNMENT_SPAN; |
| /** @hide */ |
| public static final int FOREGROUND_COLOR_SPAN = 2; |
| /** @hide */ |
| public static final int RELATIVE_SIZE_SPAN = 3; |
| /** @hide */ |
| public static final int SCALE_X_SPAN = 4; |
| /** @hide */ |
| public static final int STRIKETHROUGH_SPAN = 5; |
| /** @hide */ |
| public static final int UNDERLINE_SPAN = 6; |
| /** @hide */ |
| public static final int STYLE_SPAN = 7; |
| /** @hide */ |
| public static final int BULLET_SPAN = 8; |
| /** @hide */ |
| public static final int QUOTE_SPAN = 9; |
| /** @hide */ |
| public static final int LEADING_MARGIN_SPAN = 10; |
| /** @hide */ |
| public static final int URL_SPAN = 11; |
| /** @hide */ |
| public static final int BACKGROUND_COLOR_SPAN = 12; |
| /** @hide */ |
| public static final int TYPEFACE_SPAN = 13; |
| /** @hide */ |
| public static final int SUPERSCRIPT_SPAN = 14; |
| /** @hide */ |
| public static final int SUBSCRIPT_SPAN = 15; |
| /** @hide */ |
| public static final int ABSOLUTE_SIZE_SPAN = 16; |
| /** @hide */ |
| public static final int TEXT_APPEARANCE_SPAN = 17; |
| /** @hide */ |
| public static final int ANNOTATION = 18; |
| /** @hide */ |
| public static final int SUGGESTION_SPAN = 19; |
| /** @hide */ |
| public static final int SPELL_CHECK_SPAN = 20; |
| /** @hide */ |
| public static final int SUGGESTION_RANGE_SPAN = 21; |
| /** @hide */ |
| public static final int EASY_EDIT_SPAN = 22; |
| /** @hide */ |
| public static final int LOCALE_SPAN = 23; |
| /** @hide */ |
| public static final int TTS_SPAN = 24; |
| /** @hide */ |
| public static final int LAST_SPAN = TTS_SPAN; |
| |
| /** |
| * Flatten a CharSequence and whatever styles can be copied across processes |
| * into the parcel. |
| */ |
| public static void writeToParcel(CharSequence cs, Parcel p, int parcelableFlags) { |
| if (cs instanceof Spanned) { |
| p.writeInt(0); |
| p.writeString(cs.toString()); |
| |
| Spanned sp = (Spanned) cs; |
| Object[] os = sp.getSpans(0, cs.length(), Object.class); |
| |
| // note to people adding to this: check more specific types |
| // before more generic types. also notice that it uses |
| // "if" instead of "else if" where there are interfaces |
| // so one object can be several. |
| |
| for (int i = 0; i < os.length; i++) { |
| Object o = os[i]; |
| Object prop = os[i]; |
| |
| if (prop instanceof CharacterStyle) { |
| prop = ((CharacterStyle) prop).getUnderlying(); |
| } |
| |
| if (prop instanceof ParcelableSpan) { |
| final ParcelableSpan ps = (ParcelableSpan) prop; |
| final int spanTypeId = ps.getSpanTypeIdInternal(); |
| if (spanTypeId < FIRST_SPAN || spanTypeId > LAST_SPAN) { |
| Log.e(TAG, "External class \"" + ps.getClass().getSimpleName() |
| + "\" is attempting to use the frameworks-only ParcelableSpan" |
| + " interface"); |
| } else { |
| p.writeInt(spanTypeId); |
| ps.writeToParcelInternal(p, parcelableFlags); |
| writeWhere(p, sp, o); |
| } |
| } |
| } |
| |
| p.writeInt(0); |
| } else { |
| p.writeInt(1); |
| if (cs != null) { |
| p.writeString(cs.toString()); |
| } else { |
| p.writeString(null); |
| } |
| } |
| } |
| |
| private static void writeWhere(Parcel p, Spanned sp, Object o) { |
| p.writeInt(sp.getSpanStart(o)); |
| p.writeInt(sp.getSpanEnd(o)); |
| p.writeInt(sp.getSpanFlags(o)); |
| } |
| |
| public static final Parcelable.Creator<CharSequence> CHAR_SEQUENCE_CREATOR |
| = new Parcelable.Creator<CharSequence>() { |
| /** |
| * Read and return a new CharSequence, possibly with styles, |
| * from the parcel. |
| */ |
| public CharSequence createFromParcel(Parcel p) { |
| int kind = p.readInt(); |
| |
| String string = p.readString(); |
| if (string == null) { |
| return null; |
| } |
| |
| if (kind == 1) { |
| return string; |
| } |
| |
| SpannableString sp = new SpannableString(string); |
| |
| while (true) { |
| kind = p.readInt(); |
| |
| if (kind == 0) |
| break; |
| |
| switch (kind) { |
| case ALIGNMENT_SPAN: |
| readSpan(p, sp, new AlignmentSpan.Standard(p)); |
| break; |
| |
| case FOREGROUND_COLOR_SPAN: |
| readSpan(p, sp, new ForegroundColorSpan(p)); |
| break; |
| |
| case RELATIVE_SIZE_SPAN: |
| readSpan(p, sp, new RelativeSizeSpan(p)); |
| break; |
| |
| case SCALE_X_SPAN: |
| readSpan(p, sp, new ScaleXSpan(p)); |
| break; |
| |
| case STRIKETHROUGH_SPAN: |
| readSpan(p, sp, new StrikethroughSpan(p)); |
| break; |
| |
| case UNDERLINE_SPAN: |
| readSpan(p, sp, new UnderlineSpan(p)); |
| break; |
| |
| case STYLE_SPAN: |
| readSpan(p, sp, new StyleSpan(p)); |
| break; |
| |
| case BULLET_SPAN: |
| readSpan(p, sp, new BulletSpan(p)); |
| break; |
| |
| case QUOTE_SPAN: |
| readSpan(p, sp, new QuoteSpan(p)); |
| break; |
| |
| case LEADING_MARGIN_SPAN: |
| readSpan(p, sp, new LeadingMarginSpan.Standard(p)); |
| break; |
| |
| case URL_SPAN: |
| readSpan(p, sp, new URLSpan(p)); |
| break; |
| |
| case BACKGROUND_COLOR_SPAN: |
| readSpan(p, sp, new BackgroundColorSpan(p)); |
| break; |
| |
| case TYPEFACE_SPAN: |
| readSpan(p, sp, new TypefaceSpan(p)); |
| break; |
| |
| case SUPERSCRIPT_SPAN: |
| readSpan(p, sp, new SuperscriptSpan(p)); |
| break; |
| |
| case SUBSCRIPT_SPAN: |
| readSpan(p, sp, new SubscriptSpan(p)); |
| break; |
| |
| case ABSOLUTE_SIZE_SPAN: |
| readSpan(p, sp, new AbsoluteSizeSpan(p)); |
| break; |
| |
| case TEXT_APPEARANCE_SPAN: |
| readSpan(p, sp, new TextAppearanceSpan(p)); |
| break; |
| |
| case ANNOTATION: |
| readSpan(p, sp, new Annotation(p)); |
| break; |
| |
| case SUGGESTION_SPAN: |
| readSpan(p, sp, new SuggestionSpan(p)); |
| break; |
| |
| case SPELL_CHECK_SPAN: |
| readSpan(p, sp, new SpellCheckSpan(p)); |
| break; |
| |
| case SUGGESTION_RANGE_SPAN: |
| readSpan(p, sp, new SuggestionRangeSpan(p)); |
| break; |
| |
| case EASY_EDIT_SPAN: |
| readSpan(p, sp, new EasyEditSpan(p)); |
| break; |
| |
| case LOCALE_SPAN: |
| readSpan(p, sp, new LocaleSpan(p)); |
| break; |
| |
| case TTS_SPAN: |
| readSpan(p, sp, new TtsSpan(p)); |
| break; |
| |
| default: |
| throw new RuntimeException("bogus span encoding " + kind); |
| } |
| } |
| |
| return sp; |
| } |
| |
| public CharSequence[] newArray(int size) |
| { |
| return new CharSequence[size]; |
| } |
| }; |
| |
| /** |
| * Debugging tool to print the spans in a CharSequence. The output will |
| * be printed one span per line. If the CharSequence is not a Spanned, |
| * then the entire string will be printed on a single line. |
| */ |
| public static void dumpSpans(CharSequence cs, Printer printer, String prefix) { |
| if (cs instanceof Spanned) { |
| Spanned sp = (Spanned) cs; |
| Object[] os = sp.getSpans(0, cs.length(), Object.class); |
| |
| for (int i = 0; i < os.length; i++) { |
| Object o = os[i]; |
| printer.println(prefix + cs.subSequence(sp.getSpanStart(o), |
| sp.getSpanEnd(o)) + ": " |
| + Integer.toHexString(System.identityHashCode(o)) |
| + " " + o.getClass().getCanonicalName() |
| + " (" + sp.getSpanStart(o) + "-" + sp.getSpanEnd(o) |
| + ") fl=#" + sp.getSpanFlags(o)); |
| } |
| } else { |
| printer.println(prefix + cs + ": (no spans)"); |
| } |
| } |
| |
| /** |
| * Return a new CharSequence in which each of the source strings is |
| * replaced by the corresponding element of the destinations. |
| */ |
| public static CharSequence replace(CharSequence template, |
| String[] sources, |
| CharSequence[] destinations) { |
| SpannableStringBuilder tb = new SpannableStringBuilder(template); |
| |
| for (int i = 0; i < sources.length; i++) { |
| int where = indexOf(tb, sources[i]); |
| |
| if (where >= 0) |
| tb.setSpan(sources[i], where, where + sources[i].length(), |
| Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); |
| } |
| |
| for (int i = 0; i < sources.length; i++) { |
| int start = tb.getSpanStart(sources[i]); |
| int end = tb.getSpanEnd(sources[i]); |
| |
| if (start >= 0) { |
| tb.replace(start, end, destinations[i]); |
| } |
| } |
| |
| return tb; |
| } |
| |
| /** |
| * Replace instances of "^1", "^2", etc. in the |
| * <code>template</code> CharSequence with the corresponding |
| * <code>values</code>. "^^" is used to produce a single caret in |
| * the output. Only up to 9 replacement values are supported, |
| * "^10" will be produce the first replacement value followed by a |
| * '0'. |
| * |
| * @param template the input text containing "^1"-style |
| * placeholder values. This object is not modified; a copy is |
| * returned. |
| * |
| * @param values CharSequences substituted into the template. The |
| * first is substituted for "^1", the second for "^2", and so on. |
| * |
| * @return the new CharSequence produced by doing the replacement |
| * |
| * @throws IllegalArgumentException if the template requests a |
| * value that was not provided, or if more than 9 values are |
| * provided. |
| */ |
| public static CharSequence expandTemplate(CharSequence template, |
| CharSequence... values) { |
| if (values.length > 9) { |
| throw new IllegalArgumentException("max of 9 values are supported"); |
| } |
| |
| SpannableStringBuilder ssb = new SpannableStringBuilder(template); |
| |
| try { |
| int i = 0; |
| while (i < ssb.length()) { |
| if (ssb.charAt(i) == '^') { |
| char next = ssb.charAt(i+1); |
| if (next == '^') { |
| ssb.delete(i+1, i+2); |
| ++i; |
| continue; |
| } else if (Character.isDigit(next)) { |
| int which = Character.getNumericValue(next) - 1; |
| if (which < 0) { |
| throw new IllegalArgumentException( |
| "template requests value ^" + (which+1)); |
| } |
| if (which >= values.length) { |
| throw new IllegalArgumentException( |
| "template requests value ^" + (which+1) + |
| "; only " + values.length + " provided"); |
| } |
| ssb.replace(i, i+2, values[which]); |
| i += values[which].length(); |
| continue; |
| } |
| } |
| ++i; |
| } |
| } catch (IndexOutOfBoundsException ignore) { |
| // happens when ^ is the last character in the string. |
| } |
| return ssb; |
| } |
| |
| public static int getOffsetBefore(CharSequence text, int offset) { |
| if (offset == 0) |
| return 0; |
| if (offset == 1) |
| return 0; |
| |
| char c = text.charAt(offset - 1); |
| |
| if (c >= '\uDC00' && c <= '\uDFFF') { |
| char c1 = text.charAt(offset - 2); |
| |
| if (c1 >= '\uD800' && c1 <= '\uDBFF') |
| offset -= 2; |
| else |
| offset -= 1; |
| } else { |
| offset -= 1; |
| } |
| |
| if (text instanceof Spanned) { |
| ReplacementSpan[] spans = ((Spanned) text).getSpans(offset, offset, |
| ReplacementSpan.class); |
| |
| for (int i = 0; i < spans.length; i++) { |
| int start = ((Spanned) text).getSpanStart(spans[i]); |
| int end = ((Spanned) text).getSpanEnd(spans[i]); |
| |
| if (start < offset && end > offset) |
| offset = start; |
| } |
| } |
| |
| return offset; |
| } |
| |
| public static int getOffsetAfter(CharSequence text, int offset) { |
| int len = text.length(); |
| |
| if (offset == len) |
| return len; |
| if (offset == len - 1) |
| return len; |
| |
| char c = text.charAt(offset); |
| |
| if (c >= '\uD800' && c <= '\uDBFF') { |
| char c1 = text.charAt(offset + 1); |
| |
| if (c1 >= '\uDC00' && c1 <= '\uDFFF') |
| offset += 2; |
| else |
| offset += 1; |
| } else { |
| offset += 1; |
| } |
| |
| if (text instanceof Spanned) { |
| ReplacementSpan[] spans = ((Spanned) text).getSpans(offset, offset, |
| ReplacementSpan.class); |
| |
| for (int i = 0; i < spans.length; i++) { |
| int start = ((Spanned) text).getSpanStart(spans[i]); |
| int end = ((Spanned) text).getSpanEnd(spans[i]); |
| |
| if (start < offset && end > offset) |
| offset = end; |
| } |
| } |
| |
| return offset; |
| } |
| |
| private static void readSpan(Parcel p, Spannable sp, Object o) { |
| sp.setSpan(o, p.readInt(), p.readInt(), p.readInt()); |
| } |
| |
| /** |
| * Copies the spans from the region <code>start...end</code> in |
| * <code>source</code> to the region |
| * <code>destoff...destoff+end-start</code> in <code>dest</code>. |
| * Spans in <code>source</code> that begin before <code>start</code> |
| * or end after <code>end</code> but overlap this range are trimmed |
| * as if they began at <code>start</code> or ended at <code>end</code>. |
| * |
| * @throws IndexOutOfBoundsException if any of the copied spans |
| * are out of range in <code>dest</code>. |
| */ |
| public static void copySpansFrom(Spanned source, int start, int end, |
| Class kind, |
| Spannable dest, int destoff) { |
| if (kind == null) { |
| kind = Object.class; |
| } |
| |
| Object[] spans = source.getSpans(start, end, kind); |
| |
| for (int i = 0; i < spans.length; i++) { |
| int st = source.getSpanStart(spans[i]); |
| int en = source.getSpanEnd(spans[i]); |
| int fl = source.getSpanFlags(spans[i]); |
| |
| if (st < start) |
| st = start; |
| if (en > end) |
| en = end; |
| |
| dest.setSpan(spans[i], st - start + destoff, en - start + destoff, |
| fl); |
| } |
| } |
| |
| public enum TruncateAt { |
| START, |
| MIDDLE, |
| END, |
| MARQUEE, |
| /** |
| * @hide |
| */ |
| END_SMALL |
| } |
| |
| public interface EllipsizeCallback { |
| /** |
| * This method is called to report that the specified region of |
| * text was ellipsized away by a call to {@link #ellipsize}. |
| */ |
| public void ellipsized(int start, int end); |
| } |
| |
| /** |
| * Returns the original text if it fits in the specified width |
| * given the properties of the specified Paint, |
| * or, if it does not fit, a truncated |
| * copy with ellipsis character added at the specified edge or center. |
| */ |
| public static CharSequence ellipsize(CharSequence text, |
| TextPaint p, |
| float avail, TruncateAt where) { |
| return ellipsize(text, p, avail, where, false, null); |
| } |
| |
| /** |
| * Returns the original text if it fits in the specified width |
| * given the properties of the specified Paint, |
| * or, if it does not fit, a copy with ellipsis character added |
| * at the specified edge or center. |
| * If <code>preserveLength</code> is specified, the returned copy |
| * will be padded with zero-width spaces to preserve the original |
| * length and offsets instead of truncating. |
| * If <code>callback</code> is non-null, it will be called to |
| * report the start and end of the ellipsized range. TextDirection |
| * is determined by the first strong directional character. |
| */ |
| public static CharSequence ellipsize(CharSequence text, |
| TextPaint paint, |
| float avail, TruncateAt where, |
| boolean preserveLength, |
| EllipsizeCallback callback) { |
| return ellipsize(text, paint, avail, where, preserveLength, callback, |
| TextDirectionHeuristics.FIRSTSTRONG_LTR, |
| (where == TruncateAt.END_SMALL) ? ELLIPSIS_TWO_DOTS_STRING : ELLIPSIS_STRING); |
| } |
| |
| /** |
| * Returns the original text if it fits in the specified width |
| * given the properties of the specified Paint, |
| * or, if it does not fit, a copy with ellipsis character added |
| * at the specified edge or center. |
| * If <code>preserveLength</code> is specified, the returned copy |
| * will be padded with zero-width spaces to preserve the original |
| * length and offsets instead of truncating. |
| * If <code>callback</code> is non-null, it will be called to |
| * report the start and end of the ellipsized range. |
| * |
| * @hide |
| */ |
| public static CharSequence ellipsize(CharSequence text, |
| TextPaint paint, |
| float avail, TruncateAt where, |
| boolean preserveLength, |
| EllipsizeCallback callback, |
| TextDirectionHeuristic textDir, String ellipsis) { |
| |
| int len = text.length(); |
| |
| MeasuredText mt = MeasuredText.obtain(); |
| try { |
| float width = setPara(mt, paint, text, 0, text.length(), textDir); |
| |
| if (width <= avail) { |
| if (callback != null) { |
| callback.ellipsized(0, 0); |
| } |
| |
| return text; |
| } |
| |
| // XXX assumes ellipsis string does not require shaping and |
| // is unaffected by style |
| float ellipsiswid = paint.measureText(ellipsis); |
| avail -= ellipsiswid; |
| |
| int left = 0; |
| int right = len; |
| if (avail < 0) { |
| // it all goes |
| } else if (where == TruncateAt.START) { |
| right = len - mt.breakText(len, false, avail); |
| } else if (where == TruncateAt.END || where == TruncateAt.END_SMALL) { |
| left = mt.breakText(len, true, avail); |
| } else { |
| right = len - mt.breakText(len, false, avail / 2); |
| avail -= mt.measure(right, len); |
| left = mt.breakText(right, true, avail); |
| } |
| |
| if (callback != null) { |
| callback.ellipsized(left, right); |
| } |
| |
| char[] buf = mt.mChars; |
| Spanned sp = text instanceof Spanned ? (Spanned) text : null; |
| |
| int remaining = len - (right - left); |
| if (preserveLength) { |
| if (remaining > 0) { // else eliminate the ellipsis too |
| buf[left++] = ellipsis.charAt(0); |
| } |
| for (int i = left; i < right; i++) { |
| buf[i] = ZWNBS_CHAR; |
| } |
| String s = new String(buf, 0, len); |
| if (sp == null) { |
| return s; |
| } |
| SpannableString ss = new SpannableString(s); |
| copySpansFrom(sp, 0, len, Object.class, ss, 0); |
| return ss; |
| } |
| |
| if (remaining == 0) { |
| return ""; |
| } |
| |
| if (sp == null) { |
| StringBuilder sb = new StringBuilder(remaining + ellipsis.length()); |
| sb.append(buf, 0, left); |
| sb.append(ellipsis); |
| sb.append(buf, right, len - right); |
| return sb.toString(); |
| } |
| |
| SpannableStringBuilder ssb = new SpannableStringBuilder(); |
| ssb.append(text, 0, left); |
| ssb.append(ellipsis); |
| ssb.append(text, right, len); |
| return ssb; |
| } finally { |
| MeasuredText.recycle(mt); |
| } |
| } |
| |
| /** |
| * Converts a CharSequence of the comma-separated form "Andy, Bob, |
| * Charles, David" that is too wide to fit into the specified width |
| * into one like "Andy, Bob, 2 more". |
| * |
| * @param text the text to truncate |
| * @param p the Paint with which to measure the text |
| * @param avail the horizontal width available for the text |
| * @param oneMore the string for "1 more" in the current locale |
| * @param more the string for "%d more" in the current locale |
| */ |
| public static CharSequence commaEllipsize(CharSequence text, |
| TextPaint p, float avail, |
| String oneMore, |
| String more) { |
| return commaEllipsize(text, p, avail, oneMore, more, |
| TextDirectionHeuristics.FIRSTSTRONG_LTR); |
| } |
| |
| /** |
| * @hide |
| */ |
| public static CharSequence commaEllipsize(CharSequence text, TextPaint p, |
| float avail, String oneMore, String more, TextDirectionHeuristic textDir) { |
| |
| MeasuredText mt = MeasuredText.obtain(); |
| try { |
| int len = text.length(); |
| float width = setPara(mt, p, text, 0, len, textDir); |
| if (width <= avail) { |
| return text; |
| } |
| |
| char[] buf = mt.mChars; |
| |
| int commaCount = 0; |
| for (int i = 0; i < len; i++) { |
| if (buf[i] == ',') { |
| commaCount++; |
| } |
| } |
| |
| int remaining = commaCount + 1; |
| |
| int ok = 0; |
| String okFormat = ""; |
| |
| int w = 0; |
| int count = 0; |
| float[] widths = mt.mWidths; |
| |
| MeasuredText tempMt = MeasuredText.obtain(); |
| for (int i = 0; i < len; i++) { |
| w += widths[i]; |
| |
| if (buf[i] == ',') { |
| count++; |
| |
| String format; |
| // XXX should not insert spaces, should be part of string |
| // XXX should use plural rules and not assume English plurals |
| if (--remaining == 1) { |
| format = " " + oneMore; |
| } else { |
| format = " " + String.format(more, remaining); |
| } |
| |
| // XXX this is probably ok, but need to look at it more |
| tempMt.setPara(format, 0, format.length(), textDir, null); |
| float moreWid = tempMt.addStyleRun(p, tempMt.mLen, null); |
| |
| if (w + moreWid <= avail) { |
| ok = i + 1; |
| okFormat = format; |
| } |
| } |
| } |
| MeasuredText.recycle(tempMt); |
| |
| SpannableStringBuilder out = new SpannableStringBuilder(okFormat); |
| out.insert(0, text, 0, ok); |
| return out; |
| } finally { |
| MeasuredText.recycle(mt); |
| } |
| } |
| |
| private static float setPara(MeasuredText mt, TextPaint paint, |
| CharSequence text, int start, int end, TextDirectionHeuristic textDir) { |
| |
| mt.setPara(text, start, end, textDir, null); |
| |
| float width; |
| Spanned sp = text instanceof Spanned ? (Spanned) text : null; |
| int len = end - start; |
| if (sp == null) { |
| width = mt.addStyleRun(paint, len, null); |
| } else { |
| width = 0; |
| int spanEnd; |
| for (int spanStart = 0; spanStart < len; spanStart = spanEnd) { |
| spanEnd = sp.nextSpanTransition(spanStart, len, |
| MetricAffectingSpan.class); |
| MetricAffectingSpan[] spans = sp.getSpans( |
| spanStart, spanEnd, MetricAffectingSpan.class); |
| spans = TextUtils.removeEmptySpans(spans, sp, MetricAffectingSpan.class); |
| width += mt.addStyleRun(paint, spans, spanEnd - spanStart, null); |
| } |
| } |
| |
| return width; |
| } |
| |
| private static final char FIRST_RIGHT_TO_LEFT = '\u0590'; |
| |
| /* package */ |
| static boolean doesNotNeedBidi(CharSequence s, int start, int end) { |
| for (int i = start; i < end; i++) { |
| if (s.charAt(i) >= FIRST_RIGHT_TO_LEFT) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /* package */ |
| static boolean doesNotNeedBidi(char[] text, int start, int len) { |
| for (int i = start, e = i + len; i < e; i++) { |
| if (text[i] >= FIRST_RIGHT_TO_LEFT) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /* package */ static char[] obtain(int len) { |
| char[] buf; |
| |
| synchronized (sLock) { |
| buf = sTemp; |
| sTemp = null; |
| } |
| |
| if (buf == null || buf.length < len) |
| buf = ArrayUtils.newUnpaddedCharArray(len); |
| |
| return buf; |
| } |
| |
| /* package */ static void recycle(char[] temp) { |
| if (temp.length > 1000) |
| return; |
| |
| synchronized (sLock) { |
| sTemp = temp; |
| } |
| } |
| |
| /** |
| * Html-encode the string. |
| * @param s the string to be encoded |
| * @return the encoded string |
| */ |
| public static String htmlEncode(String s) { |
| StringBuilder sb = new StringBuilder(); |
| char c; |
| for (int i = 0; i < s.length(); i++) { |
| c = s.charAt(i); |
| switch (c) { |
| case '<': |
| sb.append("<"); //$NON-NLS-1$ |
| break; |
| case '>': |
| sb.append(">"); //$NON-NLS-1$ |
| break; |
| case '&': |
| sb.append("&"); //$NON-NLS-1$ |
| break; |
| case '\'': |
| //http://www.w3.org/TR/xhtml1 |
| // The named character reference ' (the apostrophe, U+0027) was introduced in |
| // XML 1.0 but does not appear in HTML. Authors should therefore use ' instead |
| // of ' to work as expected in HTML 4 user agents. |
| sb.append("'"); //$NON-NLS-1$ |
| break; |
| case '"': |
| sb.append("""); //$NON-NLS-1$ |
| break; |
| default: |
| sb.append(c); |
| } |
| } |
| return sb.toString(); |
| } |
| |
| /** |
| * Returns a CharSequence concatenating the specified CharSequences, |
| * retaining their spans if any. |
| */ |
| public static CharSequence concat(CharSequence... text) { |
| if (text.length == 0) { |
| return ""; |
| } |
| |
| if (text.length == 1) { |
| return text[0]; |
| } |
| |
| boolean spanned = false; |
| for (int i = 0; i < text.length; i++) { |
| if (text[i] instanceof Spanned) { |
| spanned = true; |
| break; |
| } |
| } |
| |
| StringBuilder sb = new StringBuilder(); |
| for (int i = 0; i < text.length; i++) { |
| sb.append(text[i]); |
| } |
| |
| if (!spanned) { |
| return sb.toString(); |
| } |
| |
| SpannableString ss = new SpannableString(sb); |
| int off = 0; |
| for (int i = 0; i < text.length; i++) { |
| int len = text[i].length(); |
| |
| if (text[i] instanceof Spanned) { |
| copySpansFrom((Spanned) text[i], 0, len, Object.class, ss, off); |
| } |
| |
| off += len; |
| } |
| |
| return new SpannedString(ss); |
| } |
| |
| /** |
| * Returns whether the given CharSequence contains any printable characters. |
| */ |
| public static boolean isGraphic(CharSequence str) { |
| final int len = str.length(); |
| for (int cp, i=0; i<len; i+=Character.charCount(cp)) { |
| cp = Character.codePointAt(str, i); |
| int gc = Character.getType(cp); |
| if (gc != Character.CONTROL |
| && gc != Character.FORMAT |
| && gc != Character.SURROGATE |
| && gc != Character.UNASSIGNED |
| && gc != Character.LINE_SEPARATOR |
| && gc != Character.PARAGRAPH_SEPARATOR |
| && gc != Character.SPACE_SEPARATOR) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Returns whether this character is a printable character. |
| * |
| * This does not support non-BMP characters and should not be used. |
| * |
| * @deprecated Use {@link #isGraphic(CharSequence)} instead. |
| */ |
| @Deprecated |
| public static boolean isGraphic(char c) { |
| int gc = Character.getType(c); |
| return gc != Character.CONTROL |
| && gc != Character.FORMAT |
| && gc != Character.SURROGATE |
| && gc != Character.UNASSIGNED |
| && gc != Character.LINE_SEPARATOR |
| && gc != Character.PARAGRAPH_SEPARATOR |
| && gc != Character.SPACE_SEPARATOR; |
| } |
| |
| /** |
| * Returns whether the given CharSequence contains only digits. |
| */ |
| public static boolean isDigitsOnly(CharSequence str) { |
| final int len = str.length(); |
| for (int cp, i = 0; i < len; i += Character.charCount(cp)) { |
| cp = Character.codePointAt(str, i); |
| if (!Character.isDigit(cp)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * @hide |
| */ |
| public static boolean isPrintableAscii(final char c) { |
| final int asciiFirst = 0x20; |
| final int asciiLast = 0x7E; // included |
| return (asciiFirst <= c && c <= asciiLast) || c == '\r' || c == '\n'; |
| } |
| |
| /** |
| * @hide |
| */ |
| public static boolean isPrintableAsciiOnly(final CharSequence str) { |
| final int len = str.length(); |
| for (int i = 0; i < len; i++) { |
| if (!isPrintableAscii(str.charAt(i))) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * Capitalization mode for {@link #getCapsMode}: capitalize all |
| * characters. This value is explicitly defined to be the same as |
| * {@link InputType#TYPE_TEXT_FLAG_CAP_CHARACTERS}. |
| */ |
| public static final int CAP_MODE_CHARACTERS |
| = InputType.TYPE_TEXT_FLAG_CAP_CHARACTERS; |
| |
| /** |
| * Capitalization mode for {@link #getCapsMode}: capitalize the first |
| * character of all words. This value is explicitly defined to be the same as |
| * {@link InputType#TYPE_TEXT_FLAG_CAP_WORDS}. |
| */ |
| public static final int CAP_MODE_WORDS |
| = InputType.TYPE_TEXT_FLAG_CAP_WORDS; |
| |
| /** |
| * Capitalization mode for {@link #getCapsMode}: capitalize the first |
| * character of each sentence. This value is explicitly defined to be the same as |
| * {@link InputType#TYPE_TEXT_FLAG_CAP_SENTENCES}. |
| */ |
| public static final int CAP_MODE_SENTENCES |
| = InputType.TYPE_TEXT_FLAG_CAP_SENTENCES; |
| |
| /** |
| * Determine what caps mode should be in effect at the current offset in |
| * the text. Only the mode bits set in <var>reqModes</var> will be |
| * checked. Note that the caps mode flags here are explicitly defined |
| * to match those in {@link InputType}. |
| * |
| * @param cs The text that should be checked for caps modes. |
| * @param off Location in the text at which to check. |
| * @param reqModes The modes to be checked: may be any combination of |
| * {@link #CAP_MODE_CHARACTERS}, {@link #CAP_MODE_WORDS}, and |
| * {@link #CAP_MODE_SENTENCES}. |
| * |
| * @return Returns the actual capitalization modes that can be in effect |
| * at the current position, which is any combination of |
| * {@link #CAP_MODE_CHARACTERS}, {@link #CAP_MODE_WORDS}, and |
| * {@link #CAP_MODE_SENTENCES}. |
| */ |
| public static int getCapsMode(CharSequence cs, int off, int reqModes) { |
| if (off < 0) { |
| return 0; |
| } |
| |
| int i; |
| char c; |
| int mode = 0; |
| |
| if ((reqModes&CAP_MODE_CHARACTERS) != 0) { |
| mode |= CAP_MODE_CHARACTERS; |
| } |
| if ((reqModes&(CAP_MODE_WORDS|CAP_MODE_SENTENCES)) == 0) { |
| return mode; |
| } |
| |
| // Back over allowed opening punctuation. |
| |
| for (i = off; i > 0; i--) { |
| c = cs.charAt(i - 1); |
| |
| if (c != '"' && c != '\'' && |
| Character.getType(c) != Character.START_PUNCTUATION) { |
| break; |
| } |
| } |
| |
| // Start of paragraph, with optional whitespace. |
| |
| int j = i; |
| while (j > 0 && ((c = cs.charAt(j - 1)) == ' ' || c == '\t')) { |
| j--; |
| } |
| if (j == 0 || cs.charAt(j - 1) == '\n') { |
| return mode | CAP_MODE_WORDS; |
| } |
| |
| // Or start of word if we are that style. |
| |
| if ((reqModes&CAP_MODE_SENTENCES) == 0) { |
| if (i != j) mode |= CAP_MODE_WORDS; |
| return mode; |
| } |
| |
| // There must be a space if not the start of paragraph. |
| |
| if (i == j) { |
| return mode; |
| } |
| |
| // Back over allowed closing punctuation. |
| |
| for (; j > 0; j--) { |
| c = cs.charAt(j - 1); |
| |
| if (c != '"' && c != '\'' && |
| Character.getType(c) != Character.END_PUNCTUATION) { |
| break; |
| } |
| } |
| |
| if (j > 0) { |
| c = cs.charAt(j - 1); |
| |
| if (c == '.' || c == '?' || c == '!') { |
| // Do not capitalize if the word ends with a period but |
| // also contains a period, in which case it is an abbreviation. |
| |
| if (c == '.') { |
| for (int k = j - 2; k >= 0; k--) { |
| c = cs.charAt(k); |
| |
| if (c == '.') { |
| return mode; |
| } |
| |
| if (!Character.isLetter(c)) { |
| break; |
| } |
| } |
| } |
| |
| return mode | CAP_MODE_SENTENCES; |
| } |
| } |
| |
| return mode; |
| } |
| |
| /** |
| * Does a comma-delimited list 'delimitedString' contain a certain item? |
| * (without allocating memory) |
| * |
| * @hide |
| */ |
| public static boolean delimitedStringContains( |
| String delimitedString, char delimiter, String item) { |
| if (isEmpty(delimitedString) || isEmpty(item)) { |
| return false; |
| } |
| int pos = -1; |
| int length = delimitedString.length(); |
| while ((pos = delimitedString.indexOf(item, pos + 1)) != -1) { |
| if (pos > 0 && delimitedString.charAt(pos - 1) != delimiter) { |
| continue; |
| } |
| int expectedDelimiterPos = pos + item.length(); |
| if (expectedDelimiterPos == length) { |
| // Match at end of string. |
| return true; |
| } |
| if (delimitedString.charAt(expectedDelimiterPos) == delimiter) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Removes empty spans from the <code>spans</code> array. |
| * |
| * When parsing a Spanned using {@link Spanned#nextSpanTransition(int, int, Class)}, empty spans |
| * will (correctly) create span transitions, and calling getSpans on a slice of text bounded by |
| * one of these transitions will (correctly) include the empty overlapping span. |
| * |
| * However, these empty spans should not be taken into account when layouting or rendering the |
| * string and this method provides a way to filter getSpans' results accordingly. |
| * |
| * @param spans A list of spans retrieved using {@link Spanned#getSpans(int, int, Class)} from |
| * the <code>spanned</code> |
| * @param spanned The Spanned from which spans were extracted |
| * @return A subset of spans where empty spans ({@link Spanned#getSpanStart(Object)} == |
| * {@link Spanned#getSpanEnd(Object)} have been removed. The initial order is preserved |
| * @hide |
| */ |
| @SuppressWarnings("unchecked") |
| public static <T> T[] removeEmptySpans(T[] spans, Spanned spanned, Class<T> klass) { |
| T[] copy = null; |
| int count = 0; |
| |
| for (int i = 0; i < spans.length; i++) { |
| final T span = spans[i]; |
| final int start = spanned.getSpanStart(span); |
| final int end = spanned.getSpanEnd(span); |
| |
| if (start == end) { |
| if (copy == null) { |
| copy = (T[]) Array.newInstance(klass, spans.length - 1); |
| System.arraycopy(spans, 0, copy, 0, i); |
| count = i; |
| } |
| } else { |
| if (copy != null) { |
| copy[count] = span; |
| count++; |
| } |
| } |
| } |
| |
| if (copy != null) { |
| T[] result = (T[]) Array.newInstance(klass, count); |
| System.arraycopy(copy, 0, result, 0, count); |
| return result; |
| } else { |
| return spans; |
| } |
| } |
| |
| /** |
| * Pack 2 int values into a long, useful as a return value for a range |
| * @see #unpackRangeStartFromLong(long) |
| * @see #unpackRangeEndFromLong(long) |
| * @hide |
| */ |
| public static long packRangeInLong(int start, int end) { |
| return (((long) start) << 32) | end; |
| } |
| |
| /** |
| * Get the start value from a range packed in a long by {@link #packRangeInLong(int, int)} |
| * @see #unpackRangeEndFromLong(long) |
| * @see #packRangeInLong(int, int) |
| * @hide |
| */ |
| public static int unpackRangeStartFromLong(long range) { |
| return (int) (range >>> 32); |
| } |
| |
| /** |
| * Get the end value from a range packed in a long by {@link #packRangeInLong(int, int)} |
| * @see #unpackRangeStartFromLong(long) |
| * @see #packRangeInLong(int, int) |
| * @hide |
| */ |
| public static int unpackRangeEndFromLong(long range) { |
| return (int) (range & 0x00000000FFFFFFFFL); |
| } |
| |
| /** |
| * Return the layout direction for a given Locale |
| * |
| * @param locale the Locale for which we want the layout direction. Can be null. |
| * @return the layout direction. This may be one of: |
| * {@link android.view.View#LAYOUT_DIRECTION_LTR} or |
| * {@link android.view.View#LAYOUT_DIRECTION_RTL}. |
| * |
| * Be careful: this code will need to be updated when vertical scripts will be supported |
| */ |
| public static int getLayoutDirectionFromLocale(Locale locale) { |
| return ((locale != null && !locale.equals(Locale.ROOT) |
| && ULocale.forLocale(locale).isRightToLeft()) |
| // If forcing into RTL layout mode, return RTL as default |
| || SystemProperties.getBoolean(Settings.Global.DEVELOPMENT_FORCE_RTL, false)) |
| ? View.LAYOUT_DIRECTION_RTL |
| : View.LAYOUT_DIRECTION_LTR; |
| } |
| |
| /** |
| * Return localized string representing the given number of selected items. |
| * |
| * @hide |
| */ |
| public static CharSequence formatSelectedCount(int count) { |
| return Resources.getSystem().getQuantityString(R.plurals.selected_count, count, count); |
| } |
| |
| private static Object sLock = new Object(); |
| |
| private static char[] sTemp = null; |
| |
| private static String[] EMPTY_STRING_ARRAY = new String[]{}; |
| |
| private static final char ZWNBS_CHAR = '\uFEFF'; |
| } |
