/ReferenceCode/smarthouse/mustache/php/vendor/Mustache/Tokenizer.php
PHP | 310 lines | 218 code | 32 blank | 60 comment | 36 complexity | cb717f5461750caf804f3d0f98f3922b MD5 | raw file
- <?php
- /*
- * This file is part of Mustache.php.
- *
- * (c) 2012 Justin Hileman
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
- /**
- * Mustache Tokenizer class.
- *
- * This class is responsible for turning raw template source into a set of Mustache tokens.
- */
- class Mustache_Tokenizer
- {
- // Finite state machine states
- const IN_TEXT = 0;
- const IN_TAG_TYPE = 1;
- const IN_TAG = 2;
- // Token types
- const T_SECTION = '#';
- const T_INVERTED = '^';
- const T_END_SECTION = '/';
- const T_COMMENT = '!';
- const T_PARTIAL = '>';
- const T_PARTIAL_2 = '<';
- const T_DELIM_CHANGE = '=';
- const T_ESCAPED = '_v';
- const T_UNESCAPED = '{';
- const T_UNESCAPED_2 = '&';
- const T_TEXT = '_t';
- const T_PRAGMA = '%';
- // Valid token types
- private static $tagTypes = array(
- self::T_SECTION => true,
- self::T_INVERTED => true,
- self::T_END_SECTION => true,
- self::T_COMMENT => true,
- self::T_PARTIAL => true,
- self::T_PARTIAL_2 => true,
- self::T_DELIM_CHANGE => true,
- self::T_ESCAPED => true,
- self::T_UNESCAPED => true,
- self::T_UNESCAPED_2 => true,
- self::T_PRAGMA => true,
- );
- // Interpolated tags
- private static $interpolatedTags = array(
- self::T_ESCAPED => true,
- self::T_UNESCAPED => true,
- self::T_UNESCAPED_2 => true,
- );
- // Token properties
- const TYPE = 'type';
- const NAME = 'name';
- const OTAG = 'otag';
- const CTAG = 'ctag';
- const INDEX = 'index';
- const END = 'end';
- const INDENT = 'indent';
- const NODES = 'nodes';
- const VALUE = 'value';
- private $pragmas;
- private $state;
- private $tagType;
- private $tag;
- private $buffer;
- private $tokens;
- private $seenTag;
- private $lineStart;
- private $otag;
- private $ctag;
- /**
- * Scan and tokenize template source.
- *
- * @param string $text Mustache template source to tokenize
- * @param string $delimiters Optionally, pass initial opening and closing delimiters (default: null)
- *
- * @return array Set of Mustache tokens
- */
- public function scan($text, $delimiters = null)
- {
- $this->reset();
- if ($delimiters = trim($delimiters)) {
- list($otag, $ctag) = explode(' ', $delimiters);
- $this->otag = $otag;
- $this->ctag = $ctag;
- }
- $len = strlen($text);
- for ($i = 0; $i < $len; $i++) {
- switch ($this->state) {
- case self::IN_TEXT:
- if ($this->tagChange($this->otag, $text, $i)) {
- $i--;
- $this->flushBuffer();
- $this->state = self::IN_TAG_TYPE;
- } else {
- $char = substr($text, $i, 1);
- if ($char == "\n") {
- $this->filterLine();
- } else {
- $this->buffer .= $char;
- }
- }
- break;
- case self::IN_TAG_TYPE:
- $i += strlen($this->otag) - 1;
- $char = substr($text, $i + 1, 1);
- if (isset(self::$tagTypes[$char])) {
- $tag = $char;
- $this->tagType = $tag;
- } else {
- $tag = null;
- $this->tagType = self::T_ESCAPED;
- }
- if ($this->tagType === self::T_DELIM_CHANGE) {
- $i = $this->changeDelimiters($text, $i);
- $this->state = self::IN_TEXT;
- } elseif ($this->tagType === self::T_PRAGMA) {
- $i = $this->addPragma($text, $i);
- $this->state = self::IN_TEXT;
- } else {
- if ($tag !== null) {
- $i++;
- }
- $this->state = self::IN_TAG;
- }
- $this->seenTag = $i;
- break;
- default:
- if ($this->tagChange($this->ctag, $text, $i)) {
- $this->tokens[] = array(
- self::TYPE => $this->tagType,
- self::NAME => trim($this->buffer),
- self::OTAG => $this->otag,
- self::CTAG => $this->ctag,
- self::INDEX => ($this->tagType == self::T_END_SECTION) ? $this->seenTag - strlen($this->otag) : $i + strlen($this->ctag)
- );
- $this->buffer = '';
- $i += strlen($this->ctag) - 1;
- $this->state = self::IN_TEXT;
- if ($this->tagType == self::T_UNESCAPED) {
- if ($this->ctag == '}}') {
- $i++;
- } else {
- // Clean up `{{{ tripleStache }}}` style tokens.
- $lastName = $this->tokens[count($this->tokens) - 1][self::NAME];
- if (substr($lastName, -1) === '}') {
- $this->tokens[count($this->tokens) - 1][self::NAME] = trim(substr($lastName, 0, -1));
- }
- }
- }
- } else {
- $this->buffer .= substr($text, $i, 1);
- }
- break;
- }
- }
- $this->filterLine(true);
- foreach ($this->pragmas as $pragma) {
- array_unshift($this->tokens, array(
- self::TYPE => self::T_PRAGMA,
- self::NAME => $pragma,
- ));
- }
- return $this->tokens;
- }
- /**
- * Helper function to reset tokenizer internal state.
- */
- private function reset()
- {
- $this->state = self::IN_TEXT;
- $this->tagType = null;
- $this->tag = null;
- $this->buffer = '';
- $this->tokens = array();
- $this->seenTag = false;
- $this->lineStart = 0;
- $this->otag = '{{';
- $this->ctag = '}}';
- $this->pragmas = array();
- }
- /**
- * Flush the current buffer to a token.
- */
- private function flushBuffer()
- {
- if (!empty($this->buffer)) {
- $this->tokens[] = array(self::TYPE => self::T_TEXT, self::VALUE => $this->buffer);
- $this->buffer = '';
- }
- }
- /**
- * Test whether the current line is entirely made up of whitespace.
- *
- * @return boolean True if the current line is all whitespace
- */
- private function lineIsWhitespace()
- {
- $tokensCount = count($this->tokens);
- for ($j = $this->lineStart; $j < $tokensCount; $j++) {
- $token = $this->tokens[$j];
- if (isset(self::$tagTypes[$token[self::TYPE]])) {
- if (isset(self::$interpolatedTags[$token[self::TYPE]])) {
- return false;
- }
- } elseif ($token[self::TYPE] == self::T_TEXT) {
- if (preg_match('/\S/', $token[self::VALUE])) {
- return false;
- }
- }
- }
- return true;
- }
- /**
- * Filter out whitespace-only lines and store indent levels for partials.
- *
- * @param bool $noNewLine Suppress the newline? (default: false)
- */
- private function filterLine($noNewLine = false)
- {
- $this->flushBuffer();
- if ($this->seenTag && $this->lineIsWhitespace()) {
- $tokensCount = count($this->tokens);
- for ($j = $this->lineStart; $j < $tokensCount; $j++) {
- if ($this->tokens[$j][self::TYPE] == self::T_TEXT) {
- if (isset($this->tokens[$j+1]) && $this->tokens[$j+1][self::TYPE] == self::T_PARTIAL) {
- $this->tokens[$j+1][self::INDENT] = $this->tokens[$j][self::VALUE];
- }
- $this->tokens[$j] = null;
- }
- }
- } elseif (!$noNewLine) {
- $this->tokens[] = array(self::TYPE => self::T_TEXT, self::VALUE => "\n");
- }
- $this->seenTag = false;
- $this->lineStart = count($this->tokens);
- }
- /**
- * Change the current Mustache delimiters. Set new `otag` and `ctag` values.
- *
- * @param string $text Mustache template source
- * @param int $index Current tokenizer index
- *
- * @return int New index value
- */
- private function changeDelimiters($text, $index)
- {
- $startIndex = strpos($text, '=', $index) + 1;
- $close = '='.$this->ctag;
- $closeIndex = strpos($text, $close, $index);
- list($otag, $ctag) = explode(' ', trim(substr($text, $startIndex, $closeIndex - $startIndex)));
- $this->otag = $otag;
- $this->ctag = $ctag;
- return $closeIndex + strlen($close) - 1;
- }
- private function addPragma($text, $index)
- {
- $end = strpos($text, $this->ctag, $index);
- $this->pragmas[] = trim(substr($text, $index + 2, $end - $index - 2));
- return $end + strlen($this->ctag) - 1;
- }
- /**
- * Test whether it's time to change tags.
- *
- * @param string $tag Current tag name
- * @param string $text Mustache template source
- * @param int $index Current tokenizer index
- *
- * @return boolean True if this is a closing section tag
- */
- private function tagChange($tag, $text, $index)
- {
- return substr($text, $index, strlen($tag)) === $tag;
- }
- }