FeedsXPathParserQueryParser.inc in Feeds XPath Parser 7

Pseudo-parser of XPath queries. When an XML document has a default namespace this gets called so that adding the __default__ namepace where appropriate. Aren't we nice?

@todo Cleanup.

File

FeedsXPathParserQueryParser.inc

<?php

/**
 * @file
 * Pseudo-parser of XPath queries.  When an XML document has a default
 * namespace this gets called so that adding the __default__ namepace where
 * appropriate. Aren't we nice?
 *
 * @todo
 *   Cleanup.
 * @param $query
 *   An XPath query string.
 * @return string
 *   An XPath query string with the __default__ namespace added.
 */
class FeedsXPathParserQueryParser {
  function __construct($query) {
    $this->query = preg_replace('/\\s+\\(\\s*/', '(', $query);
    $this->word_boundaries = array(
      '[',
      ']',
      '=',
      '(',
      ')',
      '.',
      '<',
      '>',
      '*',
      '!',
      '|',
      '/',
      ',',
      ' ',
      ':',
    );
    $this->in_quotes = FALSE;
    $this->quote_char = '';
    $this->word = '';
    $this->output = '';
    $this->prev_boundary = '';
    $this->axis = '';
    $this->skip_next_word = FALSE;
    $this
      ->start();
  }
  function start() {
    for ($i = 0; $i < drupal_strlen($this->query); $i++) {
      $this->i = $i;
      $c = drupal_substr($this->query, $i, 1);
      if ($c == '"' || $c == "'") {
        $this
          ->handle_quote($c);
        continue;
      }
      if ($this->in_quotes) {
        $this->word .= $c;
        continue;
      }
      if (in_array($c, $this->word_boundaries)) {
        $this
          ->handle_word_boundary($c);
      }
      else {
        $this->word .= $c;
      }
    }
    $this
      ->handle_word();
  }
  function handle_quote($c) {
    if ($this->in_quotes && $c == $this->quote_char) {
      $this->in_quotes = FALSE;
      $this->word .= $c;
      $this->output .= $this->word;
      $this->word = '';
    }
    elseif (!$this->in_quotes) {
      $this->in_quotes = TRUE;
      $this
        ->handle_word();
      $this->word = $c;
      $this->quote_char = $c;
    }
    else {
      $this->word .= $c;
    }
  }
  function handle_word_boundary($c) {
    if (in_array($this->word, array(
      'div',
      'or',
      'and',
      'mod',
    )) && $this->prev_boundary == ' ' && $c == ' ') {
      $this->output .= $this->word;
    }
    else {
      $this
        ->handle_word($c);
    }
    $this->output .= $c;
    $this->word = '';
    $this->prev_boundary = $c;
  }
  function handle_word($c = '') {
    if ($this->word == '') {
      return;
    }
    if ($c == ':' && drupal_substr($this->query, $this->i + 1, 1) == ':') {
      $this->axis = $this->word;
    }
    if ($c == ':' && drupal_substr($this->query, $this->i - 1, 1) != ':' && drupal_substr($this->query, $this->i + 1, 1) != ':') {
      $this->output .= $this->word;
      $this->skip_next_word = TRUE;
      return;
    }
    if ($this->skip_next_word) {
      $this->skip_next_word = FALSE;
      $this->output .= $this->word;
      return;
    }
    if (is_numeric($this->word) || $this->axis == 'attribute' || strpos($this->word, '@') === 0 || $c == '(' || $c == ':') {
      $this->output .= $this->word;
      return;
    }
    $this->output .= '__default__:' . $this->word;
  }
  function getQuery() {
    return $this->output;
  }

}

Classes

Name	Description
FeedsXPathParserQueryParser	@file Pseudo-parser of XPath queries. When an XML document has a default namespace this gets called so that adding the __default__ namepace where appropriate. Aren't we nice?