/**
* Measure the text, stopping early if the measured width exceeds maxWidth. Return the number of
* chars that were measured, and if measuredWidth is not null, return in it the actual width
* measured.
*
* @param text The text to measure
* @param start The offset into text to begin measuring at
* @param end The end of the text slice to measure.
* @param measureForwards If true, measure forwards, starting at start. Otherwise, measure
* backwards, starting with end.
* @param maxWidth The maximum width to accumulate.
* @param measuredWidth Optional. If not null, returns the actual width measured.
* @return The number of chars that were measured. Will always be <= abs(end - start).
*/
public int breakText(
CharSequence text,
int start,
int end,
boolean measureForwards,
float maxWidth,
float[] measuredWidth) {
if (start == 0 && text instanceof String && end == text.length()) {
return breakText((String) text, measureForwards, maxWidth, measuredWidth);
}
char[] buf = TemporaryBuffer.obtain(end - start);
int result;
TextUtils.getChars(text, start, end, buf, 0);
if (measureForwards) {
result = breakText(buf, 0, end - start, maxWidth, measuredWidth);
} else {
result = breakText(buf, 0, -(end - start), maxWidth, measuredWidth);
}
TemporaryBuffer.recycle(buf);
return result;
}
@Test
public void testDestroyWhileOpen() throws IOException {
@SuppressWarnings("resource" /* java 7 */)
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
try {
b.write(new TestRng(getName()).nextBytes(TemporaryBuffer.DEFAULT_IN_CORE_LIMIT * 2));
} finally {
b.destroy();
}
}
@Test
public void testOneBlockAndHalf_BulkWrite() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
final byte[] test = new TestRng(getName()).nextBytes(TemporaryBuffer.Block.SZ * 3 / 2);
try {
b.write(test, 0, 2);
b.write(test, 2, 4);
b.write(test, 6, test.length - 6 - 2);
b.write(test, test.length - 2, 2);
b.close();
assertEquals(test.length, b.length());
{
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(test.length, r.length);
assertArrayEquals(test, r);
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertArrayEquals(test, r);
}
} finally {
b.destroy();
}
}
@Test
public void testEmpty() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
try {
b.close();
assertEquals(0, b.length());
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(0, r.length);
} finally {
b.destroy();
}
}
@Test
public void testHeap() throws IOException {
@SuppressWarnings("resource" /* java 7 */)
final TemporaryBuffer b = new TemporaryBuffer.Heap(2 * 8 * 1024);
final byte[] r = new byte[8 * 1024];
b.write(r);
b.write(r);
try {
b.write(1);
fail("accepted too many bytes of data");
} catch (IOException e) {
assertEquals("In-memory buffer limit exceeded", e.getMessage());
}
}
@Test
public void testInCoreLimit_SwitchOnCopy() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
final byte[] test = new TestRng(getName()).nextBytes(TemporaryBuffer.DEFAULT_IN_CORE_LIMIT * 2);
try {
final ByteArrayInputStream in =
new ByteArrayInputStream(
test,
TemporaryBuffer.DEFAULT_IN_CORE_LIMIT,
test.length - TemporaryBuffer.DEFAULT_IN_CORE_LIMIT);
b.write(test, 0, TemporaryBuffer.DEFAULT_IN_CORE_LIMIT);
b.copy(in);
b.close();
assertEquals(test.length, b.length());
{
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(test.length, r.length);
assertArrayEquals(test, r);
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertArrayEquals(test, r);
}
} finally {
b.destroy();
}
}
/**
* Return the width of the text.
*
* @param text The text to measure
* @param start The index of the first character to start measuring
* @param end 1 beyond the index of the last character to measure
* @return The width of the text
*/
public float measureText(CharSequence text, int start, int end) {
if (text instanceof String) {
return measureText((String) text, start, end);
}
if (text instanceof SpannedString || text instanceof SpannableString) {
return measureText(text.toString(), start, end);
}
if (text instanceof GraphicsOperations) {
return ((GraphicsOperations) text).measureText(start, end, this);
}
char[] buf = TemporaryBuffer.obtain(end - start);
TextUtils.getChars(text, start, end, buf, 0);
float result = measureText(buf, 0, end - start);
TemporaryBuffer.recycle(buf);
return result;
}
/**
* Return the advance widths for the characters in the string.
*
* @param text The text to measure
* @param start The index of the first char to to measure
* @param end The end of the text slice to measure
* @param widths array to receive the advance widths of the characters. Must be at least a large
* as (end - start).
* @return the actual number of widths returned.
*/
public int getTextWidths(CharSequence text, int start, int end, float[] widths) {
if (text instanceof String) {
return getTextWidths((String) text, start, end, widths);
}
if (text instanceof SpannedString || text instanceof SpannableString) {
return getTextWidths(text.toString(), start, end, widths);
}
if (text instanceof GraphicsOperations) {
return ((GraphicsOperations) text).getTextWidths(start, end, widths, this);
}
char[] buf = TemporaryBuffer.obtain(end - start);
TextUtils.getChars(text, start, end, buf, 0);
int result = getTextWidths(buf, 0, end - start, widths);
TemporaryBuffer.recycle(buf);
return result;
}
@Test
public void testOneByte() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
final byte test = (byte) new TestRng(getName()).nextInt();
try {
b.write(test);
b.close();
assertEquals(1, b.length());
{
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(1, r.length);
assertEquals(test, r[0]);
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(1, r.length);
assertEquals(test, r[0]);
}
} finally {
b.destroy();
}
}
@Test
public void testLarge_SingleWrite() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
final byte[] test = new TestRng(getName()).nextBytes(TemporaryBuffer.DEFAULT_IN_CORE_LIMIT * 3);
try {
b.write(test);
b.close();
assertEquals(test.length, b.length());
{
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(test.length, r.length);
assertArrayEquals(test, r);
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(test.length, r.length);
assertArrayEquals(test, r);
}
} finally {
b.destroy();
}
}
@Test
public void testHeapWithEstimatedSize() throws IOException {
int sz = 2 * Block.SZ;
try (TemporaryBuffer b = new TemporaryBuffer.Heap(sz / 2, sz)) {
for (int i = 0; i < sz; i++) {
b.write('x');
}
try {
b.write(1);
fail("accepted too many bytes of data");
} catch (IOException e) {
assertEquals("In-memory buffer limit exceeded", e.getMessage());
}
try (InputStream in = b.openInputStream()) {
for (int i = 0; i < sz; i++) {
assertEquals('x', in.read());
}
assertEquals(-1, in.read());
}
}
}
@Test
public void testRandomWrites() throws IOException {
final TemporaryBuffer b = new TemporaryBuffer.LocalFile(null);
final TestRng rng = new TestRng(getName());
final int max = TemporaryBuffer.DEFAULT_IN_CORE_LIMIT * 2;
final byte[] expect = new byte[max];
try {
int written = 0;
boolean onebyte = true;
while (written < max) {
if (onebyte) {
final byte v = (byte) rng.nextInt();
b.write(v);
expect[written++] = v;
} else {
final int len = Math.min(rng.nextInt() & 127, max - written);
final byte[] tmp = rng.nextBytes(len);
b.write(tmp, 0, len);
System.arraycopy(tmp, 0, expect, written, len);
written += len;
}
onebyte = !onebyte;
}
assertEquals(expect.length, written);
b.close();
assertEquals(expect.length, b.length());
{
final byte[] r = b.toByteArray();
assertNotNull(r);
assertEquals(expect.length, r.length);
assertArrayEquals(expect, r);
}
{
final ByteArrayOutputStream o = new ByteArrayOutputStream();
b.writeTo(o, null);
o.close();
final byte[] r = o.toByteArray();
assertEquals(expect.length, r.length);
assertArrayEquals(expect, r);
}
} finally {
b.destroy();
}
}
