public function getText(PdfStream $stream, array $charMaps)
{
$this->charMaps = $charMaps;
$this->data = array('font' => '');
$textObjectLexer = new TextObjectLexer();
$stream->rewind();
$source = $stream->getContents();
$offset = 0;
$count = strlen($source);
$text = '';
// default, in_array
$state = 'default';
$operandBuffer = array();
while ($offset < $count) {
$token = $textObjectLexer->getNextTokenFromString($source, $offset);
$tokenContent = substr($source, $offset, $token->newPos - $offset);
switch ($token->tokenName) {
case 'white_space':
// nop. Ignore white space
break;
case 'operator':
if ($state === 'default') {
$response = $this->runOperator($operandBuffer, $tokenContent);
if ($response['type'] === 'text') {
$text .= $response['content'];
}
$operandBuffer = array();
} else {
throw new PdfException('Unexpected token ' . $token->tokenName);
}
break;
case 'numeric':
case 'name':
case 'boolean':
case 'string':
case 'null':
if ($state === 'default') {
$operandBuffer[] = $tokenContent;
} elseif ($state === 'in_array') {
$operandBuffer[] = $tokenContent;
} else {
throw new PdfException('Unexpected token ' . $token->tokenName);
}
break;
case 'array_start':
if ($state === 'default') {
if (count($operandBuffer) > 0) {
throw new PdfException('array_start but operand buffer not emtpy');
}
$state = 'in_array';
} else {
throw new PdfException('Unexpected token ' . $token->tokenName);
}
break;
case 'array_end':
if ($state === 'in_array') {
$newArray = new Objects\PdfArray();
foreach ($operandBuffer as $entry) {
$newArray[] = $entry;
}
$operandBuffer = array();
$operandBuffer[] = $newArray;
$state = 'default';
} else {
throw new PdfException('Unexpected token ' . $token->tokenName);
}
break;
default:
throw new PdfException('Unknown token ' . $token->tokenName);
break;
}
$offset = $token->newPos;
}
if ($state !== 'default') {
throw new PdfException('default state expected, ' . $state . ' given');
}
if (count($operandBuffer) !== 0) {
throw new PdfException('Empty operand buffer expected');
}
return $text;
}
/**
* @expectedException mermshaus\Pdf\Parser\PdfException
* @dataProvider providerException
*/
public function testException($test)
{
$lexer = new TextObjectLexer();
$lexer->tokenize($test);
}
