public bool MoveAhead(int numChars)
{
Debug.Assert(numChars > 0);
switch (state)
{
case TextIteratorState.Resetted:
Position = endOffset;
state = TextIteratorState.Iterating;
return(true);
case TextIteratorState.Done:
return(false);
case TextIteratorState.Iterating:
Position = (Position + numChars) % textBuffer.Length;
bool finish = oldOffset != -1 && (oldOffset > Position || oldOffset < endOffset) && Position >= endOffset;
oldOffset = Position;
if (finish)
{
state = TextIteratorState.Done;
return(false);
}
return(true);
default:
throw new Exception("Unknown text iterator state");
}
}
public bool MoveAhead(int numChars)
{
Debug.Assert(numChars > 0);
switch (state)
{
case TextIteratorState.Resetted:
if (document.TextLength == 0)
{
state = TextIteratorState.Done;
return(false);
}
Position = endOffset;
state = TextIteratorState.Iterating;
return(true);
case TextIteratorState.Done:
return(false);
case TextIteratorState.Iterating:
if (oldOffset == -1 && document.TextLength == endOffset)
{
// HACK: Take off one if the iterator start
// position is at the end of the text.
Position--;
}
if (oldOffset != -1 && Position == endOffset - 1 && document.TextLength == endOffset)
{
state = TextIteratorState.Done;
return(false);
}
Position = (Position + numChars) % document.TextLength;
bool finish = oldOffset != -1 && (oldOffset > Position || oldOffset < endOffset) && Position >= endOffset;
// HACK: Iterating is complete if Position == endOffset - 1
// when the iterator start position was initially at the
// end of the text.
if (oldOffset != -1 && oldOffset == endOffset - 1 && document.TextLength == endOffset)
{
finish = true;
}
oldOffset = Position;
if (finish)
{
state = TextIteratorState.Done;
return(false);
}
return(true);
default:
throw new Exception("Unknown text iterator state");
}
}
public bool MoveAhead(int numChars)
{
Debug.Assert(numChars > 0);
switch (state) {
case TextIteratorState.Resetted:
Position = endOffset;
state = TextIteratorState.Iterating;
return true;
case TextIteratorState.Done:
return false;
case TextIteratorState.Iterating:
Position = (Position + numChars) % textBuffer.Length;
bool finish = oldOffset != -1 && (oldOffset > Position || oldOffset < endOffset) && Position >= endOffset;
oldOffset = Position;
if (finish) {
state = TextIteratorState.Done;
return false;
}
return true;
default:
throw new Exception("Unknown text iterator state");
}
}
public void Reset()
{
state = TextIteratorState.Resetted;
Position = endOffset;
oldOffset = -1;
}
public void Reset()
{
state = TextIteratorState.Resetted;
Position = endOffset;
oldOffset = -1;
}
public virtual void Reset()
{
state = TextIteratorState.Resetted;
currentOffset = endOffset;
}
public virtual void MoveToEnd()
{
if (endOffset > 0)
currentOffset = endOffset - 1;
else
currentOffset = BufferLength - 1;
state = TextIteratorState.Iterating;
}
public virtual bool MoveAhead(int numChars)
{
Debug.Assert(numChars > 0);
switch (state) {
case TextIteratorState.Resetted:
currentOffset = endOffset;
state = TextIteratorState.Iterating;
return true;
case TextIteratorState.Done:
return false;
case TextIteratorState.Iterating:
int oldOffset = currentOffset;
currentOffset = (currentOffset + numChars) % BufferLength;
bool finish = (oldOffset > currentOffset || oldOffset < endOffset) && currentOffset >= endOffset;
if (finish) {
state = TextIteratorState.Done;
currentOffset = endOffset;
return false;
}
return true;
default:
throw new Exception("Unknown text iterator state");
}
}
public bool MoveAhead(int numChars)
{
Debug.Assert(numChars > 0);
switch (state) {
case TextIteratorState.Resetted:
if (textBuffer.Length == 0) {
state = TextIteratorState.Done;
return false;
}
Position = endOffset;
state = TextIteratorState.Iterating;
return true;
case TextIteratorState.Done:
return false;
case TextIteratorState.Iterating:
if (oldOffset == -1 && textBuffer.Length == endOffset) {
// HACK: Take off one if the iterator start
// position is at the end of the text.
Position--;
}
if (oldOffset != -1 && Position == endOffset - 1 && textBuffer.Length == endOffset) {
state = TextIteratorState.Done;
return false;
}
Position = (Position + numChars) % textBuffer.Length;
bool finish = oldOffset != -1 && (oldOffset > Position || oldOffset < endOffset) && Position >= endOffset;
// HACK: Iterating is complete if Position == endOffset - 1
// when the iterator start position was initially at the
// end of the text.
if (oldOffset != -1 && oldOffset == endOffset - 1 && textBuffer.Length == endOffset) {
finish = true;
}
oldOffset = Position;
if (finish) {
state = TextIteratorState.Done;
return false;
}
return true;
default:
throw new Exception("Unknown text iterator state");
}
}
public void Reset()
{
state = TextIteratorState.Resetted;
currentOffset = endOffset;
oldOffset = -1;
}
