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https://gitlab.com/harald.mueller/aktuelle.kurse.git
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793 lines
25 KiB
PHP
793 lines
25 KiB
PHP
<?php
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//
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// +----------------------------------------------------------------------+
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// | PHP Version 4 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2002 The PHP Group |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 2.02 of the PHP license, |
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// | that is bundled with this package in the file LICENSE, and is |
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// | available at through the world-wide-web at |
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// | http://www.php.net/license/2_02.txt. |
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// | If you did not receive a copy of the PHP license and are unable to |
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// | obtain it through the world-wide-web, please send a note to |
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// | license@php.net so we can mail you a copy immediately. |
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// +----------------------------------------------------------------------+
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// | Author: Ulf Wendel <ulf.wendel@phpdoc.de> |
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// +----------------------------------------------------------------------+
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//
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// $Id: IT.php,v 1.13 2002/02/28 08:27:13 sebastian Exp $
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//
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require_once('HTML/IT_Error.php');
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/**
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* Integrated Template - IT
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*
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* Well there's not much to say about it. I needed a template class that
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* supports a single template file with multiple (nested) blocks inside and
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* a simple block API.
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*
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* The Isotemplate API is somewhat tricky for a beginner although it is the best
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* one you can build. template::parse() [phplib template = Isotemplate] requests
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* you to name a source and a target where the current block gets parsed into.
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* Source and target can be block names or even handler names. This API gives you
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* a maximum of fexibility but you always have to know what you do which is
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* quite unusual for php skripter like me.
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*
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* I noticed that I do not any control on which block gets parsed into which one.
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* If all blocks are within one file, the script knows how they are nested and in
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* which way you have to parse them. IT knows that inner1 is a child of block2, there's
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* no need to tell him about this.
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*
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* <table border>
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* <tr>
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* <td colspan=2>
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* __global__
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* <p>
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* (hidden and automatically added)
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* </td>
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* </tr>
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* <tr>
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* <td>block1</td>
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* <td>
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* <table border>
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* <tr>
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* <td colspan=2>block2</td>
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* </tr>
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* <tr>
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* <td>inner1</td>
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* <td>inner2</td>
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* </tr>
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* </table>
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* </td>
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* </tr>
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* </table>
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*
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* To add content to block1 you simply type:
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* <code>$tpl->setCurrentBlock("block1");</code>
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* and repeat this as often as needed:
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* <code>
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* $tpl->setVariable(...);
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* $tpl->parseCurrentBlock();
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* </code>
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*
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* To add content to block2 you would type something like:
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* <code>
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* $tpl->setCurrentBlock("inner1");
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* $tpl->setVariable(...);
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* $tpl->parseCurrentBlock();
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*
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* $tpl->setVariable(...);
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* $tpl->parseCurrentBlock();
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*
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* $tpl->parse("block1");
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* </code>
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*
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* This will result in one repition of block1 which contains two repitions
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* of inner1. inner2 will be removed if $removeEmptyBlock is set to true which is the default.
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*
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* Usage:
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* <code>
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* $tpl = new IntegratedTemplate( [string filerootdir] );
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*
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* // load a template or set it with setTemplate()
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* $tpl->loadTemplatefile( string filename [, boolean removeUnknownVariables, boolean removeEmptyBlocks] )
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*
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* // set "global" Variables meaning variables not beeing within a (inner) block
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* $tpl->setVariable( string variablename, mixed value );
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*
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* // like with the Isotemplates there's a second way to use setVariable()
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* $tpl->setVariable( array ( string varname => mixed value ) );
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*
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* // Let's use any block, even a deeply nested one
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* $tpl->setCurrentBlock( string blockname );
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*
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* // repeat this as often as you need it.
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* $tpl->setVariable( array ( string varname => mixed value ) );
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* $tpl->parseCurrentBlock();
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*
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* // get the parsed template or print it: $tpl->show()
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* $tpl->get();
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* </code>
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*
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* @author Ulf Wendel <uw@netuse.de>
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* @version $Id: IT.php,v 1.13 2002/02/28 08:27:13 sebastian Exp $
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* @access public
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* @package IX[X]
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*/
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class IntegratedTemplate {
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/**
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* Contains the error objects
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* @var array
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* @access public
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* @see halt(), $printError, $haltOnError
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*/
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var $err = array();
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/**
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* Clear cache on get()?
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* @var boolean
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*/
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var $clearCache = false;
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/**
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* First character of a variable placeholder ( _{_VARIABLE} ).
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* @var string
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* @access public
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* @see $closingDelimiter, $blocknameRegExp, $variablenameRegExp
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*/
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var $openingDelimiter = "{";
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/**
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* Last character of a variable placeholder ( {VARIABLE_}_ ).
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* @var string
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* @access public
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* @see $openingDelimiter, $blocknameRegExp, $variablenameRegExp
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*/
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var $closingDelimiter = "}";
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/**
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* RegExp matching a block in the template.
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* Per default "sm" is used as the regexp modifier, "i" is missing.
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* That means a case sensitive search is done.
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* @var string
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* @access public
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* @see $variablenameRegExp, $openingDelimiter, $closingDelimiter
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*/
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var $blocknameRegExp = "[0-9A-Za-z_-]+";
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/**
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* RegExp matching a variable placeholder in the template.
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* Per default "sm" is used as the regexp modifier, "i" is missing.
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* That means a case sensitive search is done.
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* @var string
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* @access public
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* @see $blocknameRegExp, $openingDelimiter, $closingDelimiter
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*/
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var $variablenameRegExp = "[0-9A-Za-z_-]+";
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/**
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* RegExp used to find variable placeholder, filled by the constructor.
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* @var string Looks somewhat like @(delimiter varname delimiter)@
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* @access public
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* @see IntegratedTemplate()
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*/
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var $variablesRegExp = "";
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/**
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* RegExp used to strip unused variable placeholder.
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* @brother $variablesRegExp
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*/
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var $removeVariablesRegExp = "";
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/**
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* Controls the handling of unknown variables, default is remove.
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* @var boolean
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* @access public
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*/
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var $removeUnknownVariables = true;
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/**
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* Controls the handling of empty blocks, default is remove.
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* @var boolean
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* @access public
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*/
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var $removeEmptyBlocks = true;
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/**
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* RegExp used to find blocks an their content, filled by the constructor.
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* @var string
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* @see IntegratedTemplate()
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*/
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var $blockRegExp = "";
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/**
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* Name of the current block.
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* @var string
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*/
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var $currentBlock = "__global__";
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/**
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* Content of the template.
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* @var string
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*/
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var $template = "";
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/**
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* Array of all blocks and their content.
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*
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* @var array
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* @see findBlocks()
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*/
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var $blocklist = array();
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/**
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* Array with the parsed content of a block.
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*
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* @var array
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*/
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var $blockdata = array();
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/**
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* Array of variables in a block.
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* @var array
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*/
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var $blockvariables = array();
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/**
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* Array of inner blocks of a block.
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* @var array
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*/
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var $blockinner = array();
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/**
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* List of blocks to preverse even if they are "empty".
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*
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* This is something special. Sometimes you have blocks that
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* should be preserved although they are empty (no placeholder replaced).
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* Think of a shopping basket. If it's empty you have to drop a message to
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* the user. If it's filled you have to show the contents of the shopping baseket.
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* Now where do you place the message that the basket is empty? It's no good
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* idea to place it in you applications as customers tend to like unecessary minor
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* text changes. Having another template file for an empty basket means that it's
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* very likely that one fine day the filled and empty basket templates have different
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* layout. I decided to introduce blocks that to not contain any placeholder but only
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* text such as the message "Your shopping basked is empty".
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*
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* Now if there is no replacement done in such a block the block will be recognized
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* as "empty" and by default ($removeEmptyBlocks = true) be stripped off. To avoid this
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* you can now call touchBlock() to avoid this.
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*
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* The array $touchedBlocks stores a list of touched block which must not be removed even
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* if they are empty.
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*
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* @var array $touchedBlocks
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* @see touchBlock(), $removeEmptyBlocks
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*/
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var $touchedBlocks = array();
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/**
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* Variable cache.
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*
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* Variables get cached before any replacement is done.
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* Advantage: empty blocks can be removed automatically.
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* Disadvantage: might take some more memory
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*
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* @var array
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* @see setVariable(), $clearCacheOnParse
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*/
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var $variableCache = array();
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/**
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* Clear the variable cache on parse?
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*
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* If you're not an expert just leave the default false.
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* True reduces memory consumption somewhat if you tend to
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* add lots of values for unknown placeholder.
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*
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* @var boolean
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*/
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var $clearCacheOnParse = false;
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/**
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* Root directory for all file operations.
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* The string gets prefixed to all filenames given.
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* @var string
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* @see IntegratedTemplate(), setRoot()
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*/
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var $fileRoot = "";
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/**
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* Internal flag indicating that a blockname was used multiple times.
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* @var boolean
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*/
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var $flagBlocktrouble = false;
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/**
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* Flag indicating that the global block was parsed.
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* @var boolean
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*/
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var $flagGlobalParsed = false;
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/**
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* EXPERIMENTAL! FIXME!
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* Flag indication that a template gets cached.
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*
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* Complex templates require some times to be preparsed
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* before the replacement can take place. Often I use
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* one template file over and over again but I don't know
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* before that I will use the same template file again.
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* Now IT could notice this and skip the preparse.
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*
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* @var boolean
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*/
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var $flagCacheTemplatefile = true;
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/**
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* EXPERIMENTAL! FIXME!
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*/
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var $lastTemplatefile = "";
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/**
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* Builds some complex regular expressions and optinally sets the file root directory.
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*
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* Make sure that you call this constructor if you derive your template
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* class from this one.
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*
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* @param string File root directory, prefix for all filenames given to the object.
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* @see setRoot()
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*/
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function IntegratedTemplate($root = "") {
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$this->variablesRegExp = "@" . $this->openingDelimiter . "(" . $this->variablenameRegExp . ")" . $this->closingDelimiter . "@sm";
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$this->removeVariablesRegExp = "@" . $this->openingDelimiter . "\s*(" . $this->variablenameRegExp . ")\s*" . $this->closingDelimiter . "@sm";
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$this->blockRegExp = '@<!--\s+BEGIN\s+(' . $this->blocknameRegExp . ')\s+-->(.*)<!--\s+END\s+\1\s+-->@sm';
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$this->setRoot($root);
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} // end constructor
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/**
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* Print a certain block with all replacements done.
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* @brother get()
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*/
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function show($block = "__global__") {
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print $this->get($block);
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} // end func show
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/**
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* Returns a block with all replacements done.
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*
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* @param string name of the block
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* @return string
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* @throws IT_Error
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* @access public
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* @see show()
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*/
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function get($block = "__global__") {
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if ("__global__" == $block && !$this->flagGlobalParsed)
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$this->parse("__global__");
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if (!isset($this->blocklist[$block])) {
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new IT_Error("The block '$block' was not found in the template.", __FILE__, __LINE__);
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return "";
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}
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if ($this->clearCache) {
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$data = (isset($this->blockdata[$block])) ? $this->blockdata[$block] : "";
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unset($this->blockdata[$block]);
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return $data;
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} else {
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return (isset($this->blockdata[$block])) ? $this->blockdata[$block] : "";
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}
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} // end func get()
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/**
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* Parses the given block.
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*
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* @param string name of the block to be parsed
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* @access public
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* @see parseCurrentBlock()
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* @throws IT_Error
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*/
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function parse($block = "__global__", $flag_recursion = false) {
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if (!isset($this->blocklist[$block])) {
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return new IT_Error("The block '$block' was not found in the template.", __FILE__, __LINE__);
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return false;
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}
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if ("__global__" == $block)
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$this->flagGlobalParsed = true;
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$regs = array();
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$values = array();
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if ($this->clearCacheOnParse) {
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foreach ($this->variableCache as $name => $value) {
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$regs[] = "@" . $this->openingDelimiter . $name . $this->closingDelimiter . "@";
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$values[] = $value;
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}
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$this->variableCache = array();
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} else {
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foreach ($this->blockvariables[$block] as $allowedvar => $v) {
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if (isset($this->variableCache[$allowedvar])) {
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$regs[] = "@".$this->openingDelimiter . $allowedvar . $this->closingDelimiter . "@";
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$values[] = $this->variableCache[$allowedvar];
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unset($this->variableCache[$allowedvar]);
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}
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}
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}
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$outer = (0 == count($regs)) ? $this->blocklist[$block] : preg_replace($regs, $values, $this->blocklist[$block]);
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$empty = (0 == count($values)) ? true : false;
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if (isset($this->blockinner[$block])) {
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foreach ($this->blockinner[$block] as $k => $innerblock) {
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$this->parse($innerblock, true);
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if ("" != $this->blockdata[$innerblock])
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$empty = false;
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$placeholder = $this->openingDelimiter . "__" . $innerblock . "__" . $this->closingDelimiter;
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$outer = str_replace($placeholder, $this->blockdata[$innerblock], $outer);
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$this->blockdata[$innerblock] = "";
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}
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}
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if ($this->removeUnknownVariables)
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$outer = preg_replace($this->removeVariablesRegExp, "", $outer);
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if ($empty) {
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if (!$this->removeEmptyBlocks) {
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$this->blockdata[$block ].= $outer;
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} else {
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if (isset($this->touchedBlocks[$block])) {
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$this->blockdata[$block] .= $outer;
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unset($this->touchedBlocks[$block]);
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}
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}
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} else {
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$this->blockdata[$block] .= $outer;
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}
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return $empty;
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} // end func parse
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/**
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* Parses the current block
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* @see parse(), setCurrentBlock(), $currentBlock
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* @access public
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*/
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function parseCurrentBlock() {
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return $this->parse($this->currentBlock);
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} // end func parseCurrentBlock
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/**
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* Sets a variable value.
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*
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* The function can be used eighter like setVariable( "varname", "value")
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* or with one array $variables["varname"] = "value" given setVariable($variables)
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* quite like phplib templates set_var().
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*
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* @param mixed string with the variable name or an array %variables["varname"] = "value"
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* @param string value of the variable or empty if $variable is an array.
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* @param string prefix for variable names
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* @access public
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*/
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function setVariable($variable, $value = "") {
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if (is_array($variable)) {
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$this->variableCache = array_merge($this->variableCache, $variable);
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} else {
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$this->variableCache[$variable] = $value;
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}
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} // end func setVariable
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/**
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* Sets the name of the current block that is the block where variables are added.
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*
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* @param string name of the block
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* @return boolean false on failure, otherwise true
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* @throws IT_Error
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* @access public
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*/
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function setCurrentBlock($block = "__global__") {
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if (!isset($this->blocklist[$block]))
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return new IT_Error("Can't find the block '$block' in the template.", __FILE__, __LINE__);
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$this->currentBlock = $block;
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return true;
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} // end func setCurrentBlock
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/**
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* Preserves an empty block even if removeEmptyBlocks is true.
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*
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* @param string name of the block
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* @return boolean false on false, otherwise true
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* @throws IT_Error
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* @access public
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* @see $removeEmptyBlocks
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*/
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function touchBlock($block) {
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if (!isset($this->blocklist[$block]))
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return new IT_Error("Can't find the block '$block' in the template.", __FILE__, __LINE__);
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$this->touchedBlocks[$block] = true;
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return true;
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} // end func touchBlock
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/**
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* Clears all datafields of the object and rebuild the internal blocklist
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*
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* LoadTemplatefile() and setTemplate() automatically call this function
|
|
* when a new template is given. Don't use this function
|
|
* unless you know what you're doing.
|
|
*
|
|
* @access public
|
|
* @see free()
|
|
*/
|
|
function init() {
|
|
|
|
$this->free();
|
|
$this->findBlocks($this->template);
|
|
// we don't need it any more
|
|
$this->template = '';
|
|
$this->buildBlockvariablelist();
|
|
|
|
} // end func init
|
|
|
|
/**
|
|
* Clears all datafields of the object.
|
|
*
|
|
* Don't use this function unless you know what you're doing.
|
|
*
|
|
* @access public
|
|
* @see init()
|
|
*/
|
|
function free() {
|
|
|
|
$this->err = array();
|
|
|
|
$this->currentBlock = "__global__";
|
|
|
|
$this->variableCache = array();
|
|
$this->blocklookup = array();
|
|
$this->touchedBlocks = array();
|
|
|
|
$this->flagBlocktrouble = false;
|
|
$this->flagGlobalParsed = false;
|
|
|
|
} // end func free
|
|
|
|
/**
|
|
* Sets the template.
|
|
*
|
|
* You can eighter load a template file from disk with LoadTemplatefile() or set the
|
|
* template manually using this function.
|
|
*
|
|
* @param string template content
|
|
* @param boolean remove unknown/unused variables?
|
|
* @param boolean remove empty blocks?
|
|
* @see LoadTemplatefile(), $template
|
|
* @access public
|
|
*/
|
|
function setTemplate($template, $removeUnknownVariables = true, $removeEmptyBlocks = true) {
|
|
|
|
$this->removeUnknownVariables = $removeUnknownVariables;
|
|
$this->removeEmptyBlocks = $removeEmptyBlocks;
|
|
|
|
if ("" == $template && $this->flagCacheTemplatefile) {
|
|
|
|
$this->variableCache = array();
|
|
$this->blockdata = array();
|
|
$this->touchedBlocks = array();
|
|
$this->currentBlock = "__global__";
|
|
|
|
} else {
|
|
|
|
$this->template = '<!-- BEGIN __global__ -->' . $template . '<!-- END __global__ -->';
|
|
$this->init();
|
|
|
|
}
|
|
|
|
if ($this->flagBlocktrouble)
|
|
return false;
|
|
|
|
return true;
|
|
} // end func setTemplate
|
|
|
|
/**
|
|
* Reads a template file from the disk.
|
|
*
|
|
* @param string name of the template file
|
|
* @param bool how to handle unknown variables.
|
|
* @param bool how to handle empty blocks.
|
|
* @access public
|
|
* @return boolean false on failure, otherwise true
|
|
* @see $template, setTemplate(), $removeUnknownVariables, $removeEmptyBlocks
|
|
*/
|
|
function loadTemplatefile($filename, $removeUnknownVariables = true, $removeEmptyBlocks = true) {
|
|
|
|
$template = "";
|
|
if (!$this->flagCacheTemplatefile || $this->lastTemplatefile != $filename)
|
|
$template = $this->getfile($filename);
|
|
|
|
$this->lastTemplatefile = $filename;
|
|
|
|
return $this->setTemplate($template, $removeUnknownVariables, $removeEmptyBlocks);
|
|
} // end func LoadTemplatefile
|
|
|
|
/**
|
|
* Sets the file root. The file root gets prefixed to all filenames passed to the object.
|
|
*
|
|
* Make sure that you override this function when using the class
|
|
* on windows.
|
|
*
|
|
* @param string
|
|
* @see IntegratedTemplate()
|
|
* @access public
|
|
*/
|
|
function setRoot($root) {
|
|
|
|
if ("" != $root && "/" != substr($root, -1))
|
|
$root .= "/";
|
|
|
|
$this->fileRoot = $root;
|
|
|
|
} // end func setRoot
|
|
|
|
/**
|
|
* Build a list of all variables within of a block
|
|
*/
|
|
function buildBlockvariablelist() {
|
|
|
|
foreach ($this->blocklist as $name => $content) {
|
|
preg_match_all( $this->variablesRegExp, $content, $regs );
|
|
|
|
if (0 != count($regs[1])) {
|
|
|
|
foreach ($regs[1] as $k => $var)
|
|
$this->blockvariables[$name][$var] = true;
|
|
|
|
} else {
|
|
|
|
$this->blockvariables[$name] = array();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} // end func buildBlockvariablelist
|
|
|
|
/**
|
|
* Returns a list of all
|
|
*/
|
|
function getGlobalvariables() {
|
|
|
|
$regs = array();
|
|
$values = array();
|
|
|
|
foreach ($this->blockvariables["__global__"] as $allowedvar => $v) {
|
|
|
|
if (isset($this->variableCache[$allowedvar])) {
|
|
$regs[] = "@" . $this->openingDelimiter . $allowedvar . $this->closingDelimiter."@";
|
|
$values[] = $this->variableCache[$allowedvar];
|
|
unset($this->variableCache[$allowedvar]);
|
|
}
|
|
|
|
}
|
|
|
|
return array($regs, $values);
|
|
} // end func getGlobalvariables
|
|
|
|
/**
|
|
* Recusively builds a list of all blocks within the template.
|
|
*
|
|
* @param string string that gets scanned
|
|
* @see $blocklist
|
|
*/
|
|
function findBlocks($string) {
|
|
|
|
$blocklist = array();
|
|
|
|
if (preg_match_all($this->blockRegExp, $string, $regs, PREG_SET_ORDER)) {
|
|
|
|
foreach ($regs as $k => $match) {
|
|
|
|
$blockname = $match[1];
|
|
$blockcontent = $match[2];
|
|
|
|
if (isset($this->blocklist[$blockname])) {
|
|
new IT_Error("The name of a block must be unique within a template. Found '$blockname' twice. Unpredictable results may appear.", __FILE__, __LINE__);
|
|
$this->flagBlocktrouble = true;
|
|
}
|
|
|
|
$this->blocklist[$blockname] = $blockcontent;
|
|
$this->blockdata[$blockname] = "";
|
|
|
|
$blocklist[] = $blockname;
|
|
|
|
$inner = $this->findBlocks($blockcontent);
|
|
foreach ($inner as $k => $name) {
|
|
|
|
$pattern = sprintf('@<!--\s+BEGIN\s+%s\s+-->(.*)<!--\s+END\s+%s\s+-->@sm',
|
|
$name,
|
|
$name
|
|
);
|
|
|
|
$this->blocklist[$blockname] = preg_replace( $pattern,
|
|
$this->openingDelimiter . "__" . $name . "__" . $this->closingDelimiter,
|
|
$this->blocklist[$blockname]
|
|
);
|
|
$this->blockinner[$blockname][] = $name;
|
|
$this->blockparents[$name] = $blockname;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return $blocklist;
|
|
} // end func findBlocks
|
|
|
|
/**
|
|
* Reads a file from disk and returns its content.
|
|
* @param string Filename
|
|
* @return string Filecontent
|
|
*/
|
|
function getFile($filename) {
|
|
|
|
if ("/" == $filename{0} && "/" == substr($this->fileRoot, -1))
|
|
$filename = substr($filename, 1);
|
|
|
|
$filename = $this->fileRoot . $filename;
|
|
|
|
if (!($fh = @fopen($filename, "r"))) {
|
|
new IT_Error("Can't read '$filename'.", __FILE__, __LINE__);
|
|
return "";
|
|
}
|
|
|
|
$content = fread($fh, filesize($filename));
|
|
fclose($fh);
|
|
|
|
return preg_replace("#<!-- INCLUDE (.*) -->#ime", "\$this->getFile('\\1')", $content);
|
|
} // end func getFile
|
|
|
|
} // end class IntegratedTemplate
|
|
?>
|