96 lines
2.7 KiB
PHP
96 lines
2.7 KiB
PHP
<?php
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/*
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* $Id$
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.phpdoctrine.org>.
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*/
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/**
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* A parse tree printer for Doctrine Query Language parser.
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*
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* @package Doctrine
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* @subpackage Query
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* @author Janne Vanhala <jpvanhal@cc.hut.fi>
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @link http://www.phpdoctrine.org
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* @since 2.0
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* @version $Revision$
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*/
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class Doctrine_Query_Printer
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{
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/**
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* Current indentation level
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*
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* @var int
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*/
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protected $_indent = 0;
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/**
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* Defines whether parse tree is printed (default, false) or not (true).
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*
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* @var bool
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*/
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protected $_silent;
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/**
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* Constructs a new parse tree printer.
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*
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* @param bool $silent Parse tree will not be printed if true.
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*/
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public function __construct($silent = false)
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{
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$this->_silent = $silent;
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}
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/**
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* Prints an opening parenthesis followed by production name and increases
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* indentation level by one.
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*
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* This method is called before executing a production.
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*
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* @param string $name production name
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*/
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public function startProduction($name)
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{
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$this->println('(' . $name);
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$this->_indent++;
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}
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/**
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* Decreases indentation level by one and prints a closing parenthesis.
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*
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* This method is called after executing a production.
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*/
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public function endProduction()
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{
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$this->_indent--;
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$this->println(')');
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}
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/**
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* Prints text indented with spaces depending on current indentation level.
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*
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* @param string $str text
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*/
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public function println($str)
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{
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if ( ! $this->_silent) {
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echo str_repeat(' ', $this->_indent), $str, "\n";
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}
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}
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}
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