/*
* 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 com.android.internal.util.ArrayUtils;
import com.android.internal.util.GrowingArrayUtils;
import libcore.util.EmptyArray;
import java.lang.reflect.Array;
/* package */ abstract class SpannableStringInternal
{
/* package */ SpannableStringInternal(CharSequence source,
int start, int end) {
if (start == 0 && end == source.length())
mText = source.toString();
else
mText = source.toString().substring(start, end);
mSpans = EmptyArray.OBJECT;
mSpanData = EmptyArray.INT;
if (source instanceof Spanned) {
Spanned sp = (Spanned) source;
Object[] spans = sp.getSpans(start, end, Object.class);
for (int i = 0; i < spans.length; i++) {
int st = sp.getSpanStart(spans[i]);
int en = sp.getSpanEnd(spans[i]);
int fl = sp.getSpanFlags(spans[i]);
if (st < start)
st = start;
if (en > end)
en = end;
setSpan(spans[i], st - start, en - start, fl);
}
}
}
public final int length() {
return mText.length();
}
public final char charAt(int i) {
return mText.charAt(i);
}
public final String toString() {
return mText;
}
/* subclasses must do subSequence() to preserve type */
public final void getChars(int start, int end, char[] dest, int off) {
mText.getChars(start, end, dest, off);
}
/* package */ void setSpan(Object what, int start, int end, int flags) {
int nstart = start;
int nend = end;
checkRange("setSpan", start, end);
if ((flags & Spannable.SPAN_PARAGRAPH) == Spannable.SPAN_PARAGRAPH) {
if (start != 0 && start != length()) {
char c = charAt(start - 1);
if (c != '\n')
throw new RuntimeException(
"PARAGRAPH span must start at paragraph boundary" +
" (" + start + " follows " + c + ")");
}
if (end != 0 && end != length()) {
char c = charAt(end - 1);
if (c != '\n')
throw new RuntimeException(
"PARAGRAPH span must end at paragraph boundary" +
" (" + end + " follows " + c + ")");
}
}
int count = mSpanCount;
Object[] spans = mSpans;
int[] data = mSpanData;
for (int i = 0; i < count; i++) {
if (spans[i] == what) {
int ostart = data[i * COLUMNS + START];
int oend = data[i * COLUMNS + END];
data[i * COLUMNS + START] = start;
data[i * COLUMNS + END] = end;
data[i * COLUMNS + FLAGS] = flags;
sendSpanChanged(what, ostart, oend, nstart, nend);
return;
}
}
if (mSpanCount + 1 >= mSpans.length) {
Object[] newtags = ArrayUtils.newUnpaddedObjectArray(
GrowingArrayUtils.growSize(mSpanCount));
int[] newdata = new int[newtags.length * 3];
System.arraycopy(mSpans, 0, newtags, 0, mSpanCount);
System.arraycopy(mSpanData, 0, newdata, 0, mSpanCount * 3);
mSpans = newtags;
mSpanData = newdata;
}
mSpans[mSpanCount] = what;
mSpanData[mSpanCount * COLUMNS + START] = start;
mSpanData[mSpanCount * COLUMNS + END] = end;
mSpanData[mSpanCount * COLUMNS + FLAGS] = flags;
mSpanCount++;
if (this instanceof Spannable)
sendSpanAdded(what, nstart, nend);
}
/* package */ void removeSpan(Object what) {
int count = mSpanCount;
Object[] spans = mSpans;
int[] data = mSpanData;
for (int i = count - 1; i >= 0; i--) {
if (spans[i] == what) {
int ostart = data[i * COLUMNS + START];
int oend = data[i * COLUMNS + END];
int c = count - (i + 1);
System.arraycopy(spans, i + 1, spans, i, c);
System.arraycopy(data, (i + 1) * COLUMNS,
data, i * COLUMNS, c * COLUMNS);
mSpanCount--;
sendSpanRemoved(what, ostart, oend);
return;
}
}
}
public int getSpanStart(Object what) {
int count = mSpanCount;
Object[] spans = mSpans;
int[] data = mSpanData;
for (int i = count - 1; i >= 0; i--) {
if (spans[i] == what) {
return data[i * COLUMNS + START];
}
}
return -1;
}
public int getSpanEnd(Object what) {
int count = mSpanCount;
Object[] spans = mSpans;
int[] data = mSpanData;
for (int i = count - 1; i >= 0; i--) {
if (spans[i] == what) {
return data[i * COLUMNS + END];
}
}
return -1;
}
public int getSpanFlags(Object what) {
int count = mSpanCount;
Object[] spans = mSpans;
int[] data = mSpanData;
for (int i = count - 1; i >= 0; i--) {
if (spans[i] == what) {
return data[i * COLUMNS + FLAGS];
}
}
return 0;
}
public <T> T[] getSpans(int queryStart, int queryEnd, Class<T> kind) {
int count = 0;
int spanCount = mSpanCount;
Object[] spans = mSpans;
int[] data = mSpanData;
Object[] ret = null;
Object ret1 = null;
for (int i = 0; i < spanCount; i++) {
if (kind != null && !kind.isInstance(spans[i])) {
continue;
}
int spanStart = data[i * COLUMNS + START];
int spanEnd = data[i * COLUMNS + END];
if (spanStart > queryEnd) {
continue;
}
if (spanEnd < queryStart) {
continue;
}
if (spanStart != spanEnd && queryStart != queryEnd) {
if (spanStart == queryEnd) {
continue;
}
if (spanEnd == queryStart) {
continue;
}
}
if (count == 0) {
ret1 = spans[i];
count++;
} else {
if (count == 1) {
ret = (Object[]) Array.newInstance(kind, spanCount - i + 1);
ret[0] = ret1;
}
int prio = data[i * COLUMNS + FLAGS] & Spanned.SPAN_PRIORITY;
if (prio != 0) {
int j;
for (j = 0; j < count; j++) {
int p = getSpanFlags(ret[j]) & Spanned.SPAN_PRIORITY;
if (prio > p) {
break;
}
}
System.arraycopy(ret, j, ret, j + 1, count - j);
ret[j] = spans[i];
count++;
} else {
ret[count++] = spans[i];
}
}
}
if (count == 0) {
return (T[]) ArrayUtils.emptyArray(kind);
}
if (count == 1) {
ret = (Object[]) Array.newInstance(kind, 1);
ret[0] = ret1;
return (T[]) ret;
}
if (count == ret.length) {
return (T[]) ret;
}
Object[] nret = (Object[]) Array.newInstance(kind, count);
System.arraycopy(ret, 0, nret, 0, count);
return (T[]) nret;
}
public int nextSpanTransition(int start, int limit, Class kind) {
int count = mSpanCount;
Object[] spans = mSpans;
int[] data = mSpanData;
if (kind == null) {
kind = Object.class;
}
for (int i = 0; i < count; i++) {
int st = data[i * COLUMNS + START];
int en = data[i * COLUMNS + END];
if (st > start && st < limit && kind.isInstance(spans[i]))
limit = st;
if (en > start && en < limit && kind.isInstance(spans[i]))
limit = en;
}
return limit;
}
private void sendSpanAdded(Object what, int start, int end) {
SpanWatcher[] recip = getSpans(start, end, SpanWatcher.class);
int n = recip.length;
for (int i = 0; i < n; i++) {
recip[i].onSpanAdded((Spannable) this, what, start, end);
}
}
private void sendSpanRemoved(Object what, int start, int end) {
SpanWatcher[] recip = getSpans(start, end, SpanWatcher.class);
int n = recip.length;
for (int i = 0; i < n; i++) {
recip[i].onSpanRemoved((Spannable) this, what, start, end);
}
}
private void sendSpanChanged(Object what, int s, int e, int st, int en) {
SpanWatcher[] recip = getSpans(Math.min(s, st), Math.max(e, en),
SpanWatcher.class);
int n = recip.length;
for (int i = 0; i < n; i++) {
recip[i].onSpanChanged((Spannable) this, what, s, e, st, en);
}
}
private static String region(int start, int end) {
return "(" + start + " ... " + end + ")";
}
private void checkRange(final String operation, int start, int end) {
if (end < start) {
throw new IndexOutOfBoundsException(operation + " " +
region(start, end) +
" has end before start");
}
int len = length();
if (start > len || end > len) {
throw new IndexOutOfBoundsException(operation + " " +
region(start, end) +
" ends beyond length " + len);
}
if (start < 0 || end < 0) {
throw new IndexOutOfBoundsException(operation + " " +
region(start, end) +
" starts before 0");
}
}
// Same as SpannableStringBuilder
@Override
public boolean equals(Object o) {
if (o instanceof Spanned &&
toString().equals(o.toString())) {
Spanned other = (Spanned) o;
// Check span data
Object[] otherSpans = other.getSpans(0, other.length(), Object.class);
if (mSpanCount == otherSpans.length) {
for (int i = 0; i < mSpanCount; ++i) {
Object thisSpan = mSpans[i];
Object otherSpan = otherSpans[i];
if (thisSpan == this) {
if (other != otherSpan ||
getSpanStart(thisSpan) != other.getSpanStart(otherSpan) ||
getSpanEnd(thisSpan) != other.getSpanEnd(otherSpan) ||
getSpanFlags(thisSpan) != other.getSpanFlags(otherSpan)) {
return false;
}
} else if (!thisSpan.equals(otherSpan) ||
getSpanStart(thisSpan) != other.getSpanStart(otherSpan) ||
getSpanEnd(thisSpan) != other.getSpanEnd(otherSpan) ||
getSpanFlags(thisSpan) != other.getSpanFlags(otherSpan)) {
return false;
}
}
return true;
}
}
return false;
}
// Same as SpannableStringBuilder
@Override
public int hashCode() {
int hash = toString().hashCode();
hash = hash * 31 + mSpanCount;
for (int i = 0; i < mSpanCount; ++i) {
Object span = mSpans[i];
if (span != this) {
hash = hash * 31 + span.hashCode();
}
hash = hash * 31 + getSpanStart(span);
hash = hash * 31 + getSpanEnd(span);
hash = hash * 31 + getSpanFlags(span);
}
return hash;
}
private String mText;
private Object[] mSpans;
private int[] mSpanData;
private int mSpanCount;
/* package */ static final Object[] EMPTY = new Object[0];
private static final int START = 0;
private static final int END = 1;
private static final int FLAGS = 2;
private static final int COLUMNS = 3;
}
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