373 lines
11 KiB
Java
373 lines
11 KiB
Java
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/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.text;
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import com.android.internal.util.ArrayUtils;
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import java.lang.reflect.Array;
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/* package */ abstract class SpannableStringInternal
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{
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/* package */ SpannableStringInternal(CharSequence source,
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int start, int end) {
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if (start == 0 && end == source.length())
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mText = source.toString();
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else
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mText = source.toString().substring(start, end);
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int initial = ArrayUtils.idealIntArraySize(0);
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mSpans = new Object[initial];
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mSpanData = new int[initial * 3];
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if (source instanceof Spanned) {
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Spanned sp = (Spanned) source;
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Object[] spans = sp.getSpans(start, end, Object.class);
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for (int i = 0; i < spans.length; i++) {
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int st = sp.getSpanStart(spans[i]);
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int en = sp.getSpanEnd(spans[i]);
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int fl = sp.getSpanFlags(spans[i]);
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if (st < start)
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st = start;
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if (en > end)
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en = end;
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setSpan(spans[i], st - start, en - start, fl);
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}
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}
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}
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public final int length() {
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return mText.length();
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}
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public final char charAt(int i) {
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return mText.charAt(i);
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}
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public final String toString() {
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return mText;
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}
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/* subclasses must do subSequence() to preserve type */
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public final void getChars(int start, int end, char[] dest, int off) {
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mText.getChars(start, end, dest, off);
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}
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/* package */ void setSpan(Object what, int start, int end, int flags) {
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int nstart = start;
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int nend = end;
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checkRange("setSpan", start, end);
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if ((flags & Spannable.SPAN_PARAGRAPH) == Spannable.SPAN_PARAGRAPH) {
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if (start != 0 && start != length()) {
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char c = charAt(start - 1);
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if (c != '\n')
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throw new RuntimeException(
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"PARAGRAPH span must start at paragraph boundary" +
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" (" + start + " follows " + c + ")");
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}
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if (end != 0 && end != length()) {
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char c = charAt(end - 1);
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if (c != '\n')
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throw new RuntimeException(
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"PARAGRAPH span must end at paragraph boundary" +
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" (" + end + " follows " + c + ")");
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}
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}
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int count = mSpanCount;
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Object[] spans = mSpans;
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int[] data = mSpanData;
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for (int i = 0; i < count; i++) {
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if (spans[i] == what) {
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int ostart = data[i * COLUMNS + START];
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int oend = data[i * COLUMNS + END];
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data[i * COLUMNS + START] = start;
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data[i * COLUMNS + END] = end;
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data[i * COLUMNS + FLAGS] = flags;
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sendSpanChanged(what, ostart, oend, nstart, nend);
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return;
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}
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}
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if (mSpanCount + 1 >= mSpans.length) {
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int newsize = ArrayUtils.idealIntArraySize(mSpanCount + 1);
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Object[] newtags = new Object[newsize];
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int[] newdata = new int[newsize * 3];
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System.arraycopy(mSpans, 0, newtags, 0, mSpanCount);
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System.arraycopy(mSpanData, 0, newdata, 0, mSpanCount * 3);
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mSpans = newtags;
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mSpanData = newdata;
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}
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mSpans[mSpanCount] = what;
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mSpanData[mSpanCount * COLUMNS + START] = start;
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mSpanData[mSpanCount * COLUMNS + END] = end;
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mSpanData[mSpanCount * COLUMNS + FLAGS] = flags;
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mSpanCount++;
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if (this instanceof Spannable)
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sendSpanAdded(what, nstart, nend);
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}
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/* package */ void removeSpan(Object what) {
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int count = mSpanCount;
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Object[] spans = mSpans;
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int[] data = mSpanData;
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for (int i = count - 1; i >= 0; i--) {
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if (spans[i] == what) {
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int ostart = data[i * COLUMNS + START];
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int oend = data[i * COLUMNS + END];
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int c = count - (i + 1);
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System.arraycopy(spans, i + 1, spans, i, c);
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System.arraycopy(data, (i + 1) * COLUMNS,
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data, i * COLUMNS, c * COLUMNS);
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mSpanCount--;
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sendSpanRemoved(what, ostart, oend);
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return;
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}
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}
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}
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public int getSpanStart(Object what) {
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int count = mSpanCount;
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Object[] spans = mSpans;
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int[] data = mSpanData;
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for (int i = count - 1; i >= 0; i--) {
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if (spans[i] == what) {
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return data[i * COLUMNS + START];
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}
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}
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return -1;
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}
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public int getSpanEnd(Object what) {
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int count = mSpanCount;
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Object[] spans = mSpans;
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int[] data = mSpanData;
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for (int i = count - 1; i >= 0; i--) {
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if (spans[i] == what) {
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return data[i * COLUMNS + END];
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}
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}
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return -1;
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}
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public int getSpanFlags(Object what) {
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int count = mSpanCount;
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Object[] spans = mSpans;
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int[] data = mSpanData;
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for (int i = count - 1; i >= 0; i--) {
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if (spans[i] == what) {
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return data[i * COLUMNS + FLAGS];
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}
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}
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return 0;
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}
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public <T> T[] getSpans(int queryStart, int queryEnd, Class<T> kind) {
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int count = 0;
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int spanCount = mSpanCount;
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Object[] spans = mSpans;
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int[] data = mSpanData;
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Object[] ret = null;
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Object ret1 = null;
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for (int i = 0; i < spanCount; i++) {
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int spanStart = data[i * COLUMNS + START];
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int spanEnd = data[i * COLUMNS + END];
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if (spanStart > queryEnd) {
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continue;
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}
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if (spanEnd < queryStart) {
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continue;
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}
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if (spanStart != spanEnd && queryStart != queryEnd) {
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if (spanStart == queryEnd) {
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continue;
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}
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if (spanEnd == queryStart) {
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continue;
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}
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}
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if (kind != null && !kind.isInstance(spans[i])) {
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continue;
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}
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if (count == 0) {
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ret1 = spans[i];
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count++;
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} else {
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if (count == 1) {
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ret = (Object[]) Array.newInstance(kind, spanCount - i + 1);
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ret[0] = ret1;
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}
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int prio = data[i * COLUMNS + FLAGS] & Spanned.SPAN_PRIORITY;
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if (prio != 0) {
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int j;
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for (j = 0; j < count; j++) {
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int p = getSpanFlags(ret[j]) & Spanned.SPAN_PRIORITY;
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if (prio > p) {
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break;
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}
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}
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System.arraycopy(ret, j, ret, j + 1, count - j);
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ret[j] = spans[i];
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count++;
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} else {
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ret[count++] = spans[i];
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}
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}
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}
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if (count == 0) {
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return (T[]) ArrayUtils.emptyArray(kind);
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}
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if (count == 1) {
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ret = (Object[]) Array.newInstance(kind, 1);
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ret[0] = ret1;
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return (T[]) ret;
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}
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if (count == ret.length) {
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return (T[]) ret;
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}
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Object[] nret = (Object[]) Array.newInstance(kind, count);
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System.arraycopy(ret, 0, nret, 0, count);
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return (T[]) nret;
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}
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public int nextSpanTransition(int start, int limit, Class kind) {
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int count = mSpanCount;
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Object[] spans = mSpans;
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int[] data = mSpanData;
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if (kind == null) {
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kind = Object.class;
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}
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for (int i = 0; i < count; i++) {
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int st = data[i * COLUMNS + START];
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int en = data[i * COLUMNS + END];
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if (st > start && st < limit && kind.isInstance(spans[i]))
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limit = st;
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if (en > start && en < limit && kind.isInstance(spans[i]))
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limit = en;
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}
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return limit;
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}
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private void sendSpanAdded(Object what, int start, int end) {
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SpanWatcher[] recip = getSpans(start, end, SpanWatcher.class);
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int n = recip.length;
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for (int i = 0; i < n; i++) {
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recip[i].onSpanAdded((Spannable) this, what, start, end);
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}
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}
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private void sendSpanRemoved(Object what, int start, int end) {
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SpanWatcher[] recip = getSpans(start, end, SpanWatcher.class);
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int n = recip.length;
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for (int i = 0; i < n; i++) {
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recip[i].onSpanRemoved((Spannable) this, what, start, end);
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}
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}
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private void sendSpanChanged(Object what, int s, int e, int st, int en) {
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SpanWatcher[] recip = getSpans(Math.min(s, st), Math.max(e, en),
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SpanWatcher.class);
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int n = recip.length;
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for (int i = 0; i < n; i++) {
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recip[i].onSpanChanged((Spannable) this, what, s, e, st, en);
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}
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}
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private static String region(int start, int end) {
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return "(" + start + " ... " + end + ")";
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}
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private void checkRange(final String operation, int start, int end) {
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if (end < start) {
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throw new IndexOutOfBoundsException(operation + " " +
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region(start, end) +
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" has end before start");
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}
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int len = length();
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if (start > len || end > len) {
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throw new IndexOutOfBoundsException(operation + " " +
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region(start, end) +
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" ends beyond length " + len);
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}
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if (start < 0 || end < 0) {
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throw new IndexOutOfBoundsException(operation + " " +
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region(start, end) +
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" starts before 0");
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}
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}
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private String mText;
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private Object[] mSpans;
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private int[] mSpanData;
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private int mSpanCount;
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/* package */ static final Object[] EMPTY = new Object[0];
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private static final int START = 0;
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private static final int END = 1;
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private static final int FLAGS = 2;
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private static final int COLUMNS = 3;
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}
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