379 Zeilen
9 KiB
PHP
379 Zeilen
9 KiB
PHP
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<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_View
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* @subpackage Helper
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* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
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* @version $Id$
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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/**
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* Abstract class representing container for placeholder values
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*
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* @package Zend_View
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* @subpackage Helper
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* @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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abstract class Zend_View_Helper_Placeholder_Container_Abstract extends ArrayObject
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{
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/**
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* Whether or not to override all contents of placeholder
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* @const string
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*/
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const SET = 'SET';
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/**
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* Whether or not to append contents to placeholder
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* @const string
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*/
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const APPEND = 'APPEND';
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/**
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* Whether or not to prepend contents to placeholder
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* @const string
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*/
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const PREPEND = 'PREPEND';
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/**
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* What text to prefix the placeholder with when rendering
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* @var string
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*/
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protected $_prefix = '';
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/**
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* What text to append the placeholder with when rendering
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* @var string
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*/
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protected $_postfix = '';
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/**
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* What string to use between individual items in the placeholder when rendering
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* @var string
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*/
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protected $_separator = '';
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/**
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* What string to use as the indentation of output, this will typically be spaces. Eg: ' '
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* @var string
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*/
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protected $_indent = '';
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/**
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* Whether or not we're already capturing for this given container
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* @var bool
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*/
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protected $_captureLock = false;
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/**
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* What type of capture (overwrite (set), append, prepend) to use
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* @var string
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*/
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protected $_captureType;
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/**
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* Key to which to capture content
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* @var string
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*/
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protected $_captureKey;
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/**
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* Constructor - This is needed so that we can attach a class member as the ArrayObject container
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*
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* @return void
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*/
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public function __construct()
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{
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parent::__construct(array(), parent::ARRAY_AS_PROPS);
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}
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/**
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* Set a single value
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*
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* @param mixed $value
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* @return void
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*/
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public function set($value)
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{
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$this->exchangeArray(array($value));
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}
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/**
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* Prepend a value to the top of the container
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*
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* @param mixed $value
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* @return void
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*/
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public function prepend($value)
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{
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$values = $this->getArrayCopy();
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array_unshift($values, $value);
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$this->exchangeArray($values);
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}
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/**
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* Retrieve container value
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*
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* If single element registered, returns that element; otherwise,
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* serializes to array.
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*
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* @return mixed
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*/
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public function getValue()
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{
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if (1 == count($this)) {
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$keys = $this->getKeys();
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$key = array_shift($keys);
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return $this[$key];
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}
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return $this->getArrayCopy();
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}
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/**
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* Set prefix for __toString() serialization
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*
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* @param string $prefix
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* @return Zend_View_Helper_Placeholder_Container
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*/
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public function setPrefix($prefix)
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{
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$this->_prefix = (string) $prefix;
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return $this;
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}
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/**
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* Retrieve prefix
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*
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* @return string
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*/
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public function getPrefix()
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{
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return $this->_prefix;
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}
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/**
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* Set postfix for __toString() serialization
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*
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* @param string $postfix
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* @return Zend_View_Helper_Placeholder_Container
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*/
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public function setPostfix($postfix)
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{
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$this->_postfix = (string) $postfix;
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return $this;
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}
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/**
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* Retrieve postfix
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*
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* @return string
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*/
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public function getPostfix()
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{
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return $this->_postfix;
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}
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/**
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* Set separator for __toString() serialization
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*
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* Used to implode elements in container
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*
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* @param string $separator
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* @return Zend_View_Helper_Placeholder_Container
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*/
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public function setSeparator($separator)
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{
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$this->_separator = (string) $separator;
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return $this;
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}
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/**
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* Retrieve separator
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*
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* @return string
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*/
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public function getSeparator()
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{
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return $this->_separator;
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}
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/**
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* Set the indentation string for __toString() serialization,
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* optionally, if a number is passed, it will be the number of spaces
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*
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* @param string|int $indent
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* @return Zend_View_Helper_Placeholder_Container_Abstract
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*/
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public function setIndent($indent)
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{
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$this->_indent = $this->getWhitespace($indent);
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return $this;
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}
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/**
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* Retrieve indentation
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*
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* @return string
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*/
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public function getIndent()
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{
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return $this->_indent;
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}
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/**
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* Retrieve whitespace representation of $indent
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*
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* @param int|string $indent
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* @return string
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*/
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public function getWhitespace($indent)
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{
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if (is_int($indent)) {
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$indent = str_repeat(' ', $indent);
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}
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return (string) $indent;
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}
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/**
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* Start capturing content to push into placeholder
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*
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* @param int $type How to capture content into placeholder; append, prepend, or set
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* @return void
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* @throws Zend_View_Helper_Placeholder_Exception if nested captures detected
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*/
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public function captureStart($type = Zend_View_Helper_Placeholder_Container_Abstract::APPEND, $key = null)
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{
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if ($this->_captureLock) {
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require_once 'Zend/View/Helper/Placeholder/Container/Exception.php';
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$e = new Zend_View_Helper_Placeholder_Container_Exception('Cannot nest placeholder captures for the same placeholder');
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$e->setView($this->view);
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throw $e;
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}
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$this->_captureLock = true;
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$this->_captureType = $type;
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if ((null !== $key) && is_scalar($key)) {
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$this->_captureKey = (string) $key;
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}
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ob_start();
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}
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/**
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* End content capture
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*
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* @return void
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*/
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public function captureEnd()
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{
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$data = ob_get_clean();
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$key = null;
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$this->_captureLock = false;
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if (null !== $this->_captureKey) {
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$key = $this->_captureKey;
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}
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switch ($this->_captureType) {
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case self::SET:
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if (null !== $key) {
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$this[$key] = $data;
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} else {
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$this->exchangeArray(array($data));
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}
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break;
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case self::PREPEND:
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if (null !== $key) {
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$array = array($key => $data);
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$values = $this->getArrayCopy();
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$final = $array + $values;
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$this->exchangeArray($final);
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} else {
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$this->prepend($data);
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}
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break;
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case self::APPEND:
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default:
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if (null !== $key) {
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if (empty($this[$key])) {
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$this[$key] = $data;
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} else {
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$this[$key] .= $data;
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}
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} else {
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$this[$this->nextIndex()] = $data;
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}
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break;
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}
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}
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/**
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* Get keys
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*
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* @return array
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*/
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public function getKeys()
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{
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$array = $this->getArrayCopy();
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return array_keys($array);
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}
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/**
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* Next Index
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*
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* as defined by the PHP manual
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* @return int
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*/
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public function nextIndex()
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{
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$keys = $this->getKeys();
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if (0 == count($keys)) {
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return 0;
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}
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return $nextIndex = max($keys) + 1;
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}
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/**
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* Render the placeholder
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*
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* @return string
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*/
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public function toString($indent = null)
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{
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$indent = ($indent !== null)
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? $this->getWhitespace($indent)
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: $this->getIndent();
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$items = $this->getArrayCopy();
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$return = $indent
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. $this->getPrefix()
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. implode($this->getSeparator(), $items)
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. $this->getPostfix();
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$return = preg_replace("/(\r\n?|\n)/", '$1' . $indent, $return);
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return $return;
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}
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/**
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* Serialize object to string
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*
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* @return string
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*/
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public function __toString()
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{
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return $this->toString();
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}
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}
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