/* Test undo / redo stack */
@Test
public void testUndoRedo() {
final float tol = 1E-9f;
/* stroke0 and stroke1 constitute "=" */
CStroke stroke0 = new CStroke();
stroke0.addPoint(0.0f, 0.0f);
stroke0.addPoint(10.0f, 0.1f);
stroke0.addPoint(20.0f, 0.0f);
stroke0.addPoint(30.0f, 0.05f);
CStroke stroke1 = new CStroke();
stroke1.addPoint(0.0f, 10.0f);
stroke1.addPoint(10.0f, 10.95f);
stroke1.addPoint(20.0f, 10.0f);
stroke1.addPoint(30.0f, 10.02f);
/* stroke2 and stroke3 constitute "T". But they need to be merged manually.
* But eventually it'll be force-recognized as "+" instead */
CStroke stroke2 = new CStroke();
stroke2.addPoint(40.0f, -10.0f);
stroke2.addPoint(50.0f, -10.1f);
stroke2.addPoint(60.0f, -10.2f);
stroke2.addPoint(70.0f, -10.1f);
CStroke stroke3 = new CStroke();
stroke3.addPoint(55.0f, -10.0f);
stroke3.addPoint(55.0f, 0.0f);
stroke3.addPoint(55.0f, 10.0f);
stroke3.addPoint(55.0f, 20.0f);
// State stack is empty initially
assertNull(curator.getLastUserAction());
// Initially the state stack should be empty. An exception should be thrown if you attempt to
// undo or redo.
IllegalStateException caughtException = null;
try {
curator.undoUserAction();
} catch (IllegalStateException e) {
caughtException = e;
}
assertNotNull(caughtException);
caughtException = null;
try {
curator.redoUserAction();
} catch (IllegalStateException e) {
caughtException = e;
}
assertNotNull(caughtException);
assertFalse(curator.canUndoUserAction());
assertFalse(curator.canRedoUserAction());
// Add the first stroke
curator.addStroke(stroke0);
assertEquals(StrokeCuratorUserAction.AddStroke, curator.getLastUserAction());
assertTrue(curator.canUndoUserAction());
assertFalse(curator.canRedoUserAction());
assertEquals(1, curator.getNumTokens());
assertEquals(1, curator.getNumStrokes());
assertEquals(1, curator.getWrittenTokenRecogWinners().size());
assertEquals("-", curator.getWrittenTokenRecogWinners().get(0));
assertEquals(1, curator.getTokenUuids().size());
assertEquals(1, curator.getTokenUuids().size());
String token0Uuid = curator.getTokenUuid(0);
// Add the second stroke
curator.addStroke(stroke1);
assertEquals(StrokeCuratorUserAction.AddStroke, curator.getLastUserAction());
assertTrue(curator.canUndoUserAction());
assertFalse(curator.canRedoUserAction());
assertEquals(1, curator.getNumTokens());
assertEquals(2, curator.getNumStrokes());
assertEquals(1, curator.getWrittenTokenRecogWinners().size());
assertEquals("=", curator.getWrittenTokenRecogWinners().get(0));
assertEquals(1, curator.getTokenUuids().size());
String tokenUuidEqualSign = curator.getTokenUuid(0);
// Undo the AddStroke action
curator.undoUserAction();
assertTrue(curator.canUndoUserAction());
assertTrue(curator.canRedoUserAction());
assertEquals(1, curator.getNumTokens());
assertEquals(1, curator.getNumStrokes());
assertEquals(1, curator.getWrittenTokenRecogWinners().size());
assertEquals("-", curator.getWrittenTokenRecogWinners().get(0));
assertEquals(1, curator.getTokenUuids().size());
assertEquals(token0Uuid, curator.getTokenUuid(0)); // The UUID shouldn't have changed
// Redo the AddStroke action
curator.redoUserAction();
assertTrue(curator.canUndoUserAction());
assertFalse(curator.canRedoUserAction());
assertEquals(1, curator.getNumTokens());
assertEquals(2, curator.getNumStrokes());
assertEquals(1, curator.getWrittenTokenRecogWinners().size());
assertEquals("=", curator.getWrittenTokenRecogWinners().get(0));
assertEquals(1, curator.getTokenUuids().size());
assertEquals(tokenUuidEqualSign, curator.getTokenUuid(0)); // The UUID shouldn't have changed
float[] tokenBounds = curator.getWrittenTokenSet().getTokenBounds(0);
assertArrayEquals(new float[] {0.0f, 0.0f, 30.0f, 10.95f}, tokenBounds, tol);
// Move token
curator.moveToken(0, new float[] {1.0f, 1.0f, 31.0f, 11.95f});
assertEquals("=", curator.getWrittenTokenRecogWinners().get(0));
tokenBounds = curator.getWrittenTokenSet().getTokenBounds(0);
assertArrayEquals(new float[] {1.0f, 1.0f, 31.0f, 11.95f}, tokenBounds, tol);
assertEquals(StrokeCuratorUserAction.MoveToken, curator.getLastUserAction());
assertTrue(curator.canUndoUserAction());
assertFalse(curator.canRedoUserAction());
// Undo MoveToken
curator.undoUserAction();
assertEquals("=", curator.getWrittenTokenRecogWinners().get(0));
tokenBounds = curator.getWrittenTokenSet().getTokenBounds(0);
assertArrayEquals(new float[] {0.0f, 0.0f, 30.0f, 10.95f}, tokenBounds, tol);
assertEquals(StrokeCuratorUserAction.AddStroke, curator.getLastUserAction());
assertTrue(curator.canUndoUserAction());
assertTrue(curator.canRedoUserAction());
// Redo MoveToken
curator.redoUserAction();
assertEquals("=", curator.getWrittenTokenRecogWinners().get(0));
tokenBounds = curator.getWrittenTokenSet().getTokenBounds(0);
assertArrayEquals(new float[] {1.0f, 1.0f, 31.0f, 11.95f}, tokenBounds, tol);
assertEquals(StrokeCuratorUserAction.MoveToken, curator.getLastUserAction());
assertTrue(curator.canUndoUserAction());
assertFalse(curator.canRedoUserAction());
// Undo the MoveToken and two AddStroke actions
curator.undoUserAction();
curator.undoUserAction();
curator.undoUserAction();
assertFalse(curator.canUndoUserAction());
assertTrue(curator.canRedoUserAction());
assertEquals(0, curator.getNumTokens());
assertEquals(0, curator.getNumStrokes());
// Redo both AddStroke actions
curator.redoUserAction();
curator.redoUserAction();
assertTrue(curator.canUndoUserAction());
assertTrue(curator.canRedoUserAction());
assertEquals(1, curator.getNumTokens());
assertEquals(2, curator.getNumStrokes());
assertEquals(1, curator.getWrittenTokenRecogWinners().size());
assertEquals("=", curator.getWrittenTokenRecogWinners().get(0));
// Unmerge the 2nd stroke
curator.mergeStrokesAsToken(new int[] {1});
assertEquals(2, curator.getNumTokens());
assertEquals(2, curator.getNumStrokes());
assertEquals(2, curator.getWrittenTokenRecogWinners().size());
assertEquals("-", curator.getWrittenTokenRecogWinners().get(0));
assertEquals("-", curator.getWrittenTokenRecogWinners().get(1));
assertEquals(2, curator.getTokenUuids().size());
assertNotEquals(curator.getTokenUuid(0), curator.getTokenUuid(1));
assertTrue(curator.canUndoUserAction());
assertFalse(curator.canRedoUserAction());
// The internal implementation of the unmerge action is actually merge
assertEquals(StrokeCuratorUserAction.MergeStrokesAsToken, curator.getLastUserAction());
// Undo the unmerge (i.e., implemented as merge internally)
curator.undoUserAction();
assertTrue(curator.canUndoUserAction());
assertTrue(curator.canRedoUserAction());
assertEquals(1, curator.getNumTokens());
assertEquals(2, curator.getNumStrokes());
assertEquals(1, curator.getWrittenTokenRecogWinners().size());
assertEquals("=", curator.getWrittenTokenRecogWinners().get(0));
assertEquals(StrokeCuratorUserAction.AddStroke, curator.getLastUserAction());
// Force set token name
curator.forceSetRecogWinner(0, "A");
assertTrue(curator.canUndoUserAction());
assertFalse(curator.canRedoUserAction());
assertEquals(1, curator.getNumTokens());
assertEquals(2, curator.getNumStrokes());
assertEquals(1, curator.getWrittenTokenRecogWinners().size());
assertEquals("A", curator.getWrittenTokenRecogWinners().get(0));
assertEquals(StrokeCuratorUserAction.ForceSetTokenName, curator.getLastUserAction());
// Undo force set token name
curator.undoUserAction();
assertTrue(curator.canUndoUserAction());
assertTrue(curator.canRedoUserAction());
assertEquals(1, curator.getNumTokens());
assertEquals(2, curator.getNumStrokes());
assertEquals(1, curator.getWrittenTokenRecogWinners().size());
assertEquals("=", curator.getWrittenTokenRecogWinners().get(0));
assertEquals(StrokeCuratorUserAction.AddStroke, curator.getLastUserAction());
// Clear tokens
curator.clear();
assertTrue(curator.canUndoUserAction());
assertFalse(curator.canRedoUserAction());
assertEquals(0, curator.getNumTokens());
assertEquals(0, curator.getNumStrokes());
assertEquals(StrokeCuratorUserAction.ClearStrokes, curator.getLastUserAction());
// Undo clear strokes
curator.undoUserAction();
assertTrue(curator.canUndoUserAction());
assertTrue(curator.canRedoUserAction());
assertEquals(1, curator.getNumTokens());
assertEquals(2, curator.getNumStrokes());
assertEquals(1, curator.getWrittenTokenRecogWinners().size());
assertEquals("=", curator.getWrittenTokenRecogWinners().get(0));
assertEquals(StrokeCuratorUserAction.AddStroke, curator.getLastUserAction());
// Add the third and fourth strokes
curator.addStroke(stroke2);
curator.addStroke(stroke3);
assertTrue(curator.canUndoUserAction());
assertFalse(curator.canRedoUserAction());
assertEquals(3, curator.getNumTokens());
assertEquals(4, curator.getNumStrokes());
assertEquals(3, curator.getWrittenTokenRecogWinners().size());
assertEquals("=", curator.getWrittenTokenRecogWinners().get(0));
assertEquals("-", curator.getWrittenTokenRecogWinners().get(1));
assertEquals("1", curator.getWrittenTokenRecogWinners().get(2));
// Merge the third and fourth strokes into "T"
curator.mergeStrokesAsToken(new int[] {2, 3});
assertTrue(curator.canUndoUserAction());
assertFalse(curator.canRedoUserAction());
assertEquals(2, curator.getNumTokens());
assertEquals(4, curator.getNumStrokes());
assertEquals(2, curator.getWrittenTokenRecogWinners().size());
assertEquals("=", curator.getWrittenTokenRecogWinners().get(0));
assertEquals("T", curator.getWrittenTokenRecogWinners().get(1));
assertEquals(StrokeCuratorUserAction.MergeStrokesAsToken, curator.getLastUserAction());
// Remove a token
curator.removeToken(1);
assertTrue(curator.canUndoUserAction());
assertFalse(curator.canRedoUserAction());
assertEquals(1, curator.getNumTokens());
assertEquals(2, curator.getNumStrokes());
assertEquals(1, curator.getWrittenTokenRecogWinners().size());
assertEquals("=", curator.getWrittenTokenRecogWinners().get(0));
assertEquals(StrokeCuratorUserAction.RemoveToken, curator.getLastUserAction());
// Undo remove token
curator.undoUserAction();
assertTrue(curator.canUndoUserAction());
assertTrue(curator.canRedoUserAction());
assertEquals(2, curator.getNumTokens());
assertEquals(4, curator.getNumStrokes());
assertEquals(2, curator.getWrittenTokenRecogWinners().size());
assertEquals("=", curator.getWrittenTokenRecogWinners().get(0));
assertEquals("T", curator.getWrittenTokenRecogWinners().get(1));
assertEquals(StrokeCuratorUserAction.MergeStrokesAsToken, curator.getLastUserAction());
// Redo remove token
curator.redoUserAction();
assertTrue(curator.canUndoUserAction());
assertFalse(curator.canRedoUserAction());
assertEquals(1, curator.getNumTokens());
assertEquals(2, curator.getNumStrokes());
assertEquals(1, curator.getWrittenTokenRecogWinners().size());
assertEquals("=", curator.getWrittenTokenRecogWinners().get(0));
assertEquals(StrokeCuratorUserAction.RemoveToken, curator.getLastUserAction());
assertEquals(1, curator.getTokenUuids().size());
// Redo again and it should throw an exception
caughtException = null;
try {
curator.redoUserAction();
} catch (IllegalStateException e) {
caughtException = e;
}
assertNotNull(caughtException);
}
@Test
public void testSerializeDeserialize() {
CStroke[] strokesToAdd = new CStroke[4];
/* stroke0 and stroke1 constitute "=" */
CStroke stroke0 = new CStroke();
stroke0.addPoint(0.0f, 0.0f);
stroke0.addPoint(10.0f, 0.1f);
stroke0.addPoint(20.0f, 0.0f);
stroke0.addPoint(30.0f, 0.05f);
CStroke stroke1 = new CStroke();
stroke1.addPoint(0.0f, 10.0f);
stroke1.addPoint(10.0f, 10.95f);
stroke1.addPoint(20.0f, 10.0f);
stroke1.addPoint(30.0f, 10.02f);
/* stroke2 and stroke3 constitute "T". But they need to be merged manually.
* But eventually it'll be force-recognized as "+" instead */
CStroke stroke2 = new CStroke();
stroke2.addPoint(40.0f, -10.0f);
stroke2.addPoint(50.0f, -10.1f);
stroke2.addPoint(60.0f, -10.2f);
stroke2.addPoint(70.0f, -10.1f);
CStroke stroke3 = new CStroke();
stroke3.addPoint(55.0f, -10.0f);
stroke3.addPoint(55.1f, 0.0f);
stroke3.addPoint(55.0f, 10.0f);
stroke3.addPoint(55.1f, 20.1f);
strokesToAdd[0] = stroke0;
strokesToAdd[1] = stroke1;
strokesToAdd[2] = stroke2;
strokesToAdd[3] = stroke3;
for (CStroke strokeToAdd : strokesToAdd) {
curator.addStroke(strokeToAdd);
}
/* Merge stroke2 and stroke3 to get "T" */
curator.mergeStrokesAsToken(new int[] {2, 3});
assertEquals(2, curator.getNumTokens());
curator.forceSetRecogWinner(1, "+");
List<String> serializedStrokes = curator.getSerializedStrokes();
assertEquals(strokesToAdd.length, serializedStrokes.size());
for (int i = 0; i < serializedStrokes.size(); ++i) {
String serializedStroke = serializedStrokes.get(i);
try {
CStroke stroke = CStrokeJsonHelper.json2CStroke(serializedStroke);
assertEquals(strokesToAdd[i].nPoints(), stroke.nPoints());
} catch (CStrokeJsonHelper.CStrokeJsonConversionException exc) {
fail("Failed due to " + exc.getMessage());
}
}
String serializedTokenSet = curator.getSerializedTokenSet();
assertNotNull(serializedTokenSet);
assertFalse(serializedTokenSet.isEmpty());
String serializedWtConstStrokeIndices = curator.getSerializedConstStrokeIndices();
assertNotNull(serializedWtConstStrokeIndices);
assertFalse(serializedWtConstStrokeIndices.isEmpty());
String serializedState = curator.getStateSerializationString();
assertNotNull(serializedState);
assertFalse(serializedState.isEmpty());
/* Deserializatoin / injection */
curatorPrime.injectSerializedState((new JsonParser()).parse(serializedState).getAsJsonObject());
assertEquals(curator.getNumStrokes(), curatorPrime.getNumStrokes());
assertEquals(curator.getNumTokens(), curatorPrime.getNumTokens());
assertEquals(
curator.getWrittenTokenSet().recogWinners.size(),
curatorPrime.getWrittenTokenSet().recogWinners.size());
assertEquals(
curator.getWrittenTokenSet().recogPs.size(),
curatorPrime.getWrittenTokenSet().recogPs.size());
// Check deserialized token UUIDs
assertEquals(curator.getTokenUuids().size(), curatorPrime.getTokenUuids().size());
for (int i = 0; i < curator.getTokenUuids().size(); ++i) {
assertEquals(curator.getTokenUuid(i), curatorPrime.getTokenUuid(i));
}
for (int i = 0; i < curator.getWrittenTokenSet().recogWinners.size(); ++i) {
assertEquals(
curator.getWrittenTokenRecogWinners().get(i),
curatorPrime.getWrittenTokenRecogWinners().get(i));
assertArrayEquals(
curator.getWrittenTokenRecogPs().get(i),
curatorPrime.getWrittenTokenRecogPs().get(i),
1e-9);
}
assertEquals(
curator.getWrittenTokenConstStrokeIndices().size(),
curatorPrime.getWrittenTokenConstStrokeIndices().size());
List<int[]> constStrokeIndices = curator.getWrittenTokenConstStrokeIndices();
List<int[]> primeConstStrokeIndices = curatorPrime.getWrittenTokenConstStrokeIndices();
for (int i = 0; i < constStrokeIndices.size(); ++i) {
assertArrayEquals(constStrokeIndices.get(i), primeConstStrokeIndices.get(i));
}
}