/**
* Lexes one token from the current stream
*
* I'll leave the stream's pointer on the first character after the token's last
* character. For example, if the stream is "\foo bar", I'll leave the stream on
* "b" (because the space is part of the control word).
*
* @param Jstewmc\Stream\Stream $stream the character stream
* @return Jstewmc\Rtf\Token\Token|false
* @since 0.2.0
*/
public function lexOne(\Jstewmc\Stream\Stream $stream)
{
$token = false;
// if the stream has characters
if ($stream->hasCharacters()) {
// switch on the current character
switch ($stream->current()) {
case '{':
$token = $this->lexOpenBracket($stream);
break;
case '}':
$token = $this->lexCloseBracket($stream);
break;
case '\\':
$token = $this->lexBackslash($stream);
break;
case "\t":
$token = $this->lexTab($stream);
break;
case "\n":
case "\r":
case "\f":
case "":
$token = $this->lexOther($stream);
break;
default:
$token = $this->lexText($stream);
}
// advance the stream to the next character
$stream->next();
}
return $token;
}
/**
* hasCharacters() should return false if stream is after last character
*/
public function testHasCharacters_returnsFalse_ifAfterLastCharacter()
{
$chunker = new Chunker\Text('foo');
$stream = new Stream($chunker);
$stream->next();
$stream->next();
$stream->next();
$this->assertFalse($stream->hasCharacters());
return;
}
