Java 类android.text.style.TabStopSpan 实例源码

/**
 * @see android.text.style.TabStopSpan
 */
public static Span tabStop(final int where) {
    return new Span(new SpanBuilder() {
        @Override
        public Object build() {
            return new TabStopSpan.Standard(where);
        }
    });
}

private void writeSingleParagraphStyle(ParagraphStyle style, DataOutputStream dos) throws IOException {
    Class clazz = style.getClass();
    dos.writeInt(mString.getSpanStart(style));
    dos.writeInt(mString.getSpanEnd(style));
    dos.writeInt(mString.getSpanFlags(style));
    if (mCharacterStylesTags.containsKey(clazz.getSimpleName())) {
        int tag = mCharacterStylesTags.get(clazz.getSimpleName());
        if (mCharacterStylesTags.containsKey(clazz.getSimpleName())) {
            dos.writeInt(tag);
        }
        switch (tag) {
            case 24: // AligmentSpan.Standard
                AlignmentSpan.Standard as2 = (AlignmentSpan.Standard)style;
                dos.writeInt(as2.getAlignment().ordinal());
                break;
            case 25: // BulletSpan
                BulletSpan bs = (BulletSpan)style;
                dos.writeInt(bs.getLeadingMargin(true));
                dos.writeInt(bs.getLeadingMargin(false));

                break;
            case 30: // LeadingMarginSpan.Sandard
                LeadingMarginSpan.Standard lms = (LeadingMarginSpan.Standard)style;
                dos.writeInt(lms.getLeadingMargin(true));
                dos.writeInt(lms.getLeadingMargin(false));
                break;
            case 34: // QuoteSpan
                QuoteSpan qs = (QuoteSpan)style;
                dos.writeInt(qs.getColor());
                break;
            case 36: // TabStopSpan.Standard
                TabStopSpan.Standard tss = (TabStopSpan.Standard)style;
                dos.writeInt(tss.getTabStop());
                break;
            default:
        }
    } else {
        write(style,dos);
    }
}

private SpanPlacementInfo readSingleParagraph(DataInputStream dis) throws IOException {
    SpanPlacementInfo spi = new SpanPlacementInfo();
    spi.start = dis.readInt();
    spi.end = dis.readInt();
    spi.mode = dis.readInt();
    int tag = dis.readInt(); // mCharacterStylesTags.get(clazz.getSimpleName());
    switch (tag) {
        case 24: // AligmentSpan.Standard
            spi.span = new AlignmentSpan.Standard(Alignment.values()[dis.readInt()]);
            break;
        case 25: // BulletSpan
            spi.span = new BulletSpan(dis.readInt());
            dis.readInt(); // skip gap width for other lines
            break;
        case 30: // LeadingMarginSpan.Sandard
            spi.span = new LeadingMarginSpan.Standard(dis.readInt(),dis.readInt());
            break;
        case 34: // QuoteSpan
            spi.span = new QuoteSpan(dis.readInt());
            break;
        case 36: // TabStopSpan.Standard
            spi.span = new TabStopSpan.Standard(dis.readInt());
            break;
        case 80: // RemoteDrawableSpan
            break;
        default:
            spi.span = read(tag,dis);
    }
    return spi;
}

@SuppressWarnings("unchecked")
@Override
public <T> T[] getSpans(int start, int end, Class<T> type) {
    // Fast path for common time-critical spans that aren't there
    if (type == MetricAffectingSpan.class && !mHasMetricAffectingSpan) {
        return (T[]) EMPTY_METRIC_AFFECTING_SPAN_ARRAY;
    }
    if (type == ReplacementSpan.class && !mHasReplacementSpan) {
        return (T[]) EMPTY_REPLACEMENT_SPAN_ARRAY;
    }
    if (!mHasParagraphStyle) {
        if (type == LeadingMarginSpan.class) {
            return (T[]) EMPTY_LEADING_MARGIN_SPAN_ARRAY;
        }
        if (type == LineHeightSpan.class) {
            return (T[]) EMPTY_LINE_HEIGHT_SPAN_ARRAY;
        }
        if (type == TabStopSpan.class) {
            return (T[]) EMPTY_TAB_STOP_SPAN_ARRAY;
        }
    }

    T[] spansFromSuperclass = mSpannableString.getSpans(start, end, type);

    if (
            mSpansArr.length == 0 || // We have no optimized spans
            isExcludedSpanType(type)) { // Query is about unoptimized span
        return spansFromSuperclass;
    }

    // Based on Arrays.binarySearch()
    int lo = 0;
    int hi = mSpansArr.length - 1;
    int mid = -2;

    while (lo <= hi) {
        mid = (lo + hi) >>> 1;
        int midVal = mSpansArr[mid].end;

        if (midVal < start) {
            lo = mid + 1;
        } else if (midVal > start) {
            hi = mid - 1;
        } else {
            break;
        }
    }

    // Iterate over spans in range
    List<T> result = null;
    for (; mid < mSpansArr.length && mSpansArr[mid].start < end; mid++) {
        if (mSpansArr[mid].end > start && type.isInstance(mSpansArr[mid].span)) {
            if (result == null) {
                result = LIST_POOL.acquire();
                if (spansFromSuperclass.length != 0) {
                    result.addAll(Arrays.asList(spansFromSuperclass));
                }
            }
            result.add((T) mSpansArr[mid].span);
        }
    }

    // If we have list then make array and pass to superclass
    if (result == null) {
        return spansFromSuperclass;
    } else {
        T[] resultArray = result.toArray((T[]) Array.newInstance(type, result.size()));
        LIST_POOL.release(result);
        return resultArray;
    }
}