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<?php
class Text
{
public static $variable = '\b[a-zA-Z_.$][\w.$]*';
public static $namespace = '\b[a-zA-Z_.$][\w.$]*(?:\.[a-zA-Z_.$][\w.$]*|\["[^"]+"\])*';
/**
* Blanks out a portion of a string with whitespace
*
* @param $to_blank Portion of the string to be removed
* @param $string Overall string to remove it from
*/
public static function blankOut($to_blank, $string) {
$length = strlen($to_blank);
if (!$length) {
return $string;
}
$blanks = array_fill(0, $length, ' ');
return preg_replace('%' . preg_quote($to_blank, '%') . '%', implode($blanks), $string, 1);
}
/**
* Makes sure a variable is formatted namespace.namespace.etc
*
* @param shell
* Called shell because it might be missing some data
*/
public static function normalizeVariableName($shell, $source, $start){
if (strpos($shell, '[') !== false) {
$source_line = array_shift(Text::chop($source, $start[0], $start[1], $start[0] + 1));
preg_match('%^\s*([a-zA-Z_.$][\w.$]*(?:\.[a-zA-Z_.$][\w.$]|\["[^"]+"\])*)\s*=\s*function%', $source_line, $match);
$shell = preg_replace('%\["([^"]+)"\]%', '.$1', $match[1]);
}
return $shell;
}
public static function getNextPosition($array, $line_position_pair) {
list($line_number, $position) = $line_position_pair;
++$position;
if ($position >= strlen($array[$line_number])) {
++$line_number;
$position = 0;
while (!strlen($array[$line_number])) {
++$line_number;
}
}
return array($line_number, $position);
}
public static function blankOutAtPositions($to_blank, $start_line, $start_pos, $end_line = -1, $end_pos = -1) {
foreach ($to_blank as $line_number => $line) {
if ($line_number == $start_line) {
$to_blank[$line_number] = Text::blankOutAt($line, $start_pos);
}
if ($line_number > $start_line) {
if ($end_line == -1 || $line_number < $end_line) {
$to_blank[$line_number] = Text::blankOutAt($line, 0);
}
elseif ($line_number == $end_line) {
$to_blank[$line_number] = Text::blankOutAt($line, 0, $end_pos);
}
}
}
return $to_blank;
}
public static function blankOutAt($to_blank, $start, $end = -1) {
if ($end == -1) {
$end = strlen($to_blank) - 1;
}
$length = $end - $start + 1;
if (!$length) {
return $to_blank;
}
if ($length < 0) {
throw new Exception("Length is less than 0");
}
$blanks = array_fill(0, $length, ' ');
return substr($to_blank, 0, $start) . implode($blanks) . substr($to_blank, $end + 1);
}
public static function trim($string) {
return trim(preg_replace('%(^\s*/\*.*\*/\s*?|\s*?/\*.*\*/\s*$|^\s*//.*\n\s*?|\s*?//.*$)%U', '', $string));
}
public static function chop($array, $start_line, $start_position, $end_line = false, $end_position = false, $exclusive = false) {
if (!is_numeric($end_line)) {
$end_line = end(array_keys($array));
}
if (!is_numeric($end_position)) {
$end_position = strlen($array[$end_line]) - 1;
if ($end_position < 0) {
$end_position = 0;
}
}
$lines = array_slice($array, $start_line, $end_line - $start_line + 1, true);
if ($start_position > 0) {
$lines[$start_line] = Text::blankOutAt($lines[$start_line], 0, $start_position - 1);
}
$lines[$end_line] = Text::blankOutAt($lines[$end_line], $end_position + 1, strlen($lines[$end_line]));
if ($exclusive) {
if ($lines[$start_line]{$start_position}) {
$lines[$start_line]{$start_position} = ' ';
}
if ($lines[$end_line]{$end_position}) {
$lines[$end_line]{$end_position} = ' ';
}
}
return $lines;
}
/**
* Always starts at the beginning. If you want a character to be ignored, it shouldn't be passed (see chop and blankOutAt)
*/
public static function findTermination($source_array, $termination_characters, $enclosing_characters = '') {
$characters = array();
$terminators = array();
foreach (self::toArray($termination_characters) as $character) {
$terminators[$character] = true;
}
foreach (self::toArray($enclosing_characters) as $index => $character) {
$characters[$character] = ($index % 2) ? -1 : 1;
}
$all_characters = array_merge(array_keys($terminators), array_keys($characters));
$balance = 0;
foreach ($source_array as $line_number => $line) {
$line = self::toArray($line);
foreach (array_intersect($line, $all_characters) as $position => $character) {
if (!$balance && $terminators[$character]) {
return array($line_number, $position);
}
$balance += $characters[$character];
}
}
return array($line_number, $position);
}
public static function toArray($string) {
return array_slice(preg_split('%%', $string), 1, -1);
}
/**
* Splits a comment line up
*
* @returns Array(whitespace, comment data, non-comment data, comment data, has non-comment-data, comment continues on next line)
*/
public static function findComments($line, $started = false) {
if (empty($line) && !$started) {
return array(false, false, false, false, false);
}
$first = array();
$middle = array();
$last = array();
$data = false;
$multiline = false;
if ($started) {
// If we're already in a (multi-line) comment, look to close it up
if (($pos = strpos($line, '*/')) !== false) {
$first[] = trim(substr($line, 0, $pos));
$line = substr($line, $pos + 2);
}
else {
// We didn't find a terminator, we're still in a multi-line comment
$multiline = true;
}
}
$single_line = false; // Denotes that we're in a single-line comment.
if (!$multiline) {
// Split by //, /*, and */ while ignoring any surrounding whitespace
$parts = preg_split('%(\s*(?://|/\*|\*/)\s*)%', $line, -1, PREG_SPLIT_DELIM_CAPTURE);
foreach ($parts as $part) {
if (!($trimmed = trim($part))) continue;
if ($multiline && $trimmed == '*/') {
$multiline = false; // Multi-line ends!
}
elseif ($single_line || $multiline) { // If we're within a comment
if (!$data) {
$first[] = $part;
}
else { // If we've found any non-comment data, we start logging this as "after" the data
$last[] = $part;
}
}
elseif ($trimmed == '//') {
$single_line = true;
}
elseif ($trimmed == '/*') {
$multiline = true;
}
else {
$data = true;
$middle = array_merge($middle, $last);
$last = array();
}
}
}
return array(trim(implode('', $first)), trim(implode('', $middle)), trim(implode('', $last)), $data, $multiline);
}
}
?>
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