/**
*
* @param array $tokens
* @param int $indent
* @return PdfDictionary
* @throws PdfException
*/
protected function parseDictionary(array $tokens, $indent = 0)
{
$dict = new PdfDictionary();
$tokenCount = count($tokens);
// start, stop, want_name_or_end, want_value
$state = 'start';
$pos = 0;
$lastName = '';
while ($pos < $tokenCount) {
$token = $tokens[$pos];
// Debug output
//echo str_repeat(' ', $indent * 2) . $pos . ' ' .$token['name'] . "\n";
switch ($token['name']) {
case 'dictionary_start':
if ($state === 'start') {
$state = 'want_name_or_end';
$pos++;
} elseif ($state === 'want_name_or_end') {
throw new PdfException('<name> or <dictionary_end> expected, <dictionary_start> given');
} elseif ($state === 'want_value') {
// Sub-dictionary. Find next balanced dictionary_end
// and call this method recursively
$dictionaryIndent = 0;
$testPos = $pos + 1;
while ($testPos <= $tokenCount && ($tokens[$testPos]['name'] !== 'dictionary_end' || $dictionaryIndent > 0)) {
if ($tokens[$testPos]['name'] === 'dictonary_start') {
$dictionaryIndent++;
} elseif ($tokens[$testPos]['name'] === 'dictionary_end') {
$dictionaryIndent--;
}
$testPos++;
}
if ($testPos > $tokenCount) {
throw new PdfException('Unbalanced dictionaries');
}
$dict->add($lastName, $this->parseDictionary(array_slice($tokens, $pos, $testPos - $pos + 1), $indent + 1));
$lastName = '';
$state = 'want_name_or_end';
$pos = $testPos + 1;
}
break;
case 'dictionary_end':
if ($state === 'want_name_or_end') {
$state = 'stop';
$pos++;
} else {
throw new PdfException('Unexpected <dictionary_end> at ' . $pos);
}
break;
case 'array_start':
if ($state === 'want_value') {
// Find next balanced array_end and call parseArray()
$arrayIndent = 0;
$testPos = $pos + 1;
while ($testPos <= $tokenCount && ($tokens[$testPos]['name'] !== 'array_end' || $arrayIndent > 0)) {
if ($tokens[$testPos]['name'] === 'array_start') {
$arrayIndent++;
} elseif ($tokens[$testPos]['name'] === 'array_end') {
$arrayIndent--;
}
$testPos++;
}
if ($testPos > $tokenCount) {
throw new PdfException('Unbalanced arrays');
}
$dict->add($lastName, $this->parseArray(array_slice($tokens, $pos, $testPos - $pos + 1), $indent + 1));
$lastName = '';
$state = 'want_name_or_end';
$pos = $testPos + 1;
} else {
throw new PdfException('Unexpected <' . $token['name'] . '> at ' . $pos);
}
break;
case 'name':
if ($state === 'want_name_or_end') {
$lastName = $token['content'];
$state = 'want_value';
$pos++;
} elseif ($state === 'want_value') {
$dict->add($lastName, $token['content']);
$lastName = '';
$state = 'want_name_or_end';
$pos++;
} else {
throw new PdfException('Unexpected <name> at ' . $pos);
}
break;
case 'string':
case 'boolean':
case 'null':
if ($state === 'want_value') {
$dict->add($lastName, $token['content']);
$lastName = '';
$state = 'want_name_or_end';
$pos++;
} else {
throw new PdfException('Unexpected <' . $token['name'] . '> at ' . $pos);
}
break;
case 'numeric':
if ($state === 'want_value') {
if ($pos + 2 < $tokenCount) {
if ($tokens[$pos + 1]['name'] === 'numeric' && $tokens[$pos + 2]['name'] === 'reference') {
$dict->add($lastName, new PdfReference((int) $tokens[$pos]['content'], (int) $tokens[$pos + 1]['content']));
$lastName = '';
$state = 'want_name_or_end';
$pos += 3;
} else {
$dict->add($lastName, $token['content']);
$lastName = '';
$state = 'want_name_or_end';
$pos++;
}
} else {
$dict->add($lastName, $token['content']);
$lastName = '';
$state = 'want_name_or_end';
$pos++;
}
} else {
throw new PdfException('Unexpected <' . $token['name'] . '> at ' . $pos);
}
break;
case 'reference':
// References are handled by numeric
throw new PdfException('Unexpected <' . $token['name'] . '>');
break;
default:
throw new PdfException('Unexpected <' . $token['name'] . '>. This is a serious bug');
break;
}
}
if ($state !== 'stop') {
throw new PdfException('Unexpected end of input');
}
return $dict;
}
/**
*
* @return PdfDictionary
*/
public function getDocumentCatalog()
{
return $this->resolveRef($this->trailer->get('/Root'));
}
