mirror of
https://gitlab.com/harald.mueller/aktuelle.kurse.git
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740 lines
26 KiB
PHP
740 lines
26 KiB
PHP
<?php
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//
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// +----------------------------------------------------------------------+
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// | PHP version 4.0 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2001 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: ITX.php,v 1.15 2002/02/28 08:27:13 sebastian Exp $
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//
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require_once('HTML/IT.php');
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/**
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* Integrated Template Extension - ITX
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*
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* With this class you get the full power of the phplib template class.
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* You may have one file with blocks in it but you have as well one main file
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* and multiple files one for each block. This is quite usefull when you have
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* user configurable websites. Using blocks not in the main template allows
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* you to modify some parts of your layout easily.
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*
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* Note that you can replace an existing block and add new blocks at runtime.
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* Adding new blocks means changing a variable placeholder to a block.
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*
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* @author Ulf Wendel <uw@netuse.de>
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* @access public
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* @version $Id: ITX.php,v 1.15 2002/02/28 08:27:13 sebastian Exp $
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* @package IT[X]
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*/
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class IntegratedTemplateExtension extends IntegratedTemplate {
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/**
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* Array with all warnings.
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* @var array
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* @access public
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* @see $printWarning, $haltOnWarning, warning()
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*/
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var $warn = array();
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/**
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* Print warnings?
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* @var array
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* @access public
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* @see $haltOnWarning, $warn, warning()
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*/
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var $printWarning = false;
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/**
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* Call die() on warning?
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* @var boolean
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* @access public
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* @see $warn, $printWarning, warning()
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*/
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var $haltOnWarning = false;
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/**
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* RegExp used to test for a valid blockname.
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* @var string
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*/
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var $checkblocknameRegExp = '';
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/**
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* Functionnameprefix used when searching function calls in the template.
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* @var string
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*/
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var $functionPrefix = 'func_';
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/**
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* Functionname RegExp.
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* @var string
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*/
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var $functionnameRegExp = '[_a-zA-Z]+[A-Za-z_0-9]*';
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/**
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* RegExp used to grep function calls in the template.
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*
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* The variable gets set by the constructor.
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*
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* @var string
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* @see IntegratedTemplateExtension()
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*/
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var $functionRegExp = '';
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/**
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* List of functions found in the template.
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*
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* @var array
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*/
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var $functions = array();
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/**
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* List of callback functions specified by the user.
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*
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* @var array
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*/
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var $callback = array();
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/**
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* Builds some complex regexps and calls the constructor of the parent class.
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*
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* Make sure that you call this constructor if you derive your own
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* template class from this one.
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*
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* @see IntegratedTemplate()
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*/
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function IntegratedTemplateExtension($root = '') {
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$this->checkblocknameRegExp = '@' . $this->blocknameRegExp . '@';
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$this->functionRegExp = '@' . $this->functionPrefix . '(' . $this->functionnameRegExp . ')\s*\(@sm';
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$this->IntegratedTemplate($root);
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} // end func constructor
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function init() {
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$this->free();
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$this->buildFunctionlist();
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$this->findBlocks($this->template);
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// we don't need it any more
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$this->template = '';
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$this->buildBlockvariablelist();
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} // end func init
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/**
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* Replaces an existing block with new content.
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*
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* This function will replace a block of the template and all blocks contained in
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* the replaced block and add a new block insted, means you can dynamically change your
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* template.
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*
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* Note that changing the template structure violates one of the IT[X] development
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* goals. I've tried to write a simple to use template engine supporting blocks.
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* In contrast to other systems IT[X] analyses the way you've nested blocks and knows
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* which block belongs into another block. The nesting information helps to make the API
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* short and simple. Replacing blocks does not only mean that IT[X] has to update
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* the nesting information (relatively time consumpting task) but you have to
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* make sure that you do not get confused due to the template change itself.
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*
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* @param string Blockname
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* @param string Blockcontent
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* @param boolean true if the new block inherits the content of the old block
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* @return boolean
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* @throws IT_Error
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* @see replaceBlockfile(), addBlock(), addBlockfile()
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* @access public
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*/
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function replaceBlock($block, $template, $keep_content = false) {
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if (!isset($this->blocklist[$block]))
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return new IT_Error("The block '$block' does not exist in the template and thus it can't be replaced.", __FILE__, __LINE__);
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if ('' == $template)
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return new IT_Error('No block content given.', __FILE__, __LINE__);
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if ($keep_content)
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$blockdata = $this->blockdata[$block];
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// remove all kinds of links to the block / data of the block
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$this->removeBlockData($block);
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$template = "<!-- BEGIN $block -->" . $template . "<!-- END $block -->";
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$parents = $this->blockparents[$block];
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$this->findBlocks($template);
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$this->blockparents[$block] = $parents;
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// KLUDGE: rebuild the list for all block - could be done faster
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$this->buildBlockvariablelist();
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if ($keep_content)
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$this->blockdata[$block] = $blockdata;
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// old TODO - I'm not sure if we need this
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// update caches
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return true;
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} // end func replaceBlock
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/**
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* Replaces an existing block with new content from a file. Warning: not implemented yet.
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* @brother replaceBlock()
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* @param string Blockname
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* @param string Name of the file that contains the blockcontent
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* @param boolean true if the new block inherits the content of the old block
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*/
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function replaceBlockfile($block, $filename, $keep_content = false) {
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return $this->replaceBlock($block, $this->getFile($filename));
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} // end func replaceBlockfile
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/**
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* Adds a block to the template changing a variable placeholder to a block placeholder.
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*
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* Add means "replace a variable placeholder by a new block".
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* This is different to PHPLibs templates. The function loads a
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* block, creates a handle for it and assigns it to a certain
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* variable placeholder. To to the same with PHPLibs templates you would
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* call set_file() to create the handle and parse() to assign the
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* parsed block to a variable. By this PHPLibs templates assume that you tend
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* to assign a block to more than one one placeholder. To assign a parsed block
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* to more than only the placeholder you specify in this function you have
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* to use a combination of getBlock() and setVariable().
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*
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* As no updates to cached data is necessary addBlock() and addBlockfile()
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* are rather "cheap" meaning quick operations.
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*
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* The block content must not start with <!-- BEGIN blockname --> and end with
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* <!-- END blockname --> this would cause overhead and produce an error.
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*
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* @param string Name of the variable placeholder, the name must be unique within the template.
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* @param string Name of the block to be added
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* @param string Content of the block
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* @return boolean
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* @throws IT_Error
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* @see addBlockfile()
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* @access public
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*/
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function addBlock($placeholder, $blockname, $template) {
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// Don't trust any user even if it's a programmer or yourself...
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if ('' == $placeholder) {
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return new IT_Error('No variable placeholder given.', __FILE__, __LINE__);
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} else if ('' == $blockname || !preg_match($this->checkblocknameRegExp, $blockname) ) {
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return new IT_Error("No or invalid blockname '$blockname' given.", __FILE__, __LINE__);
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} else if ('' == $template) {
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return new IT_Error('No block content given.', __FILE__, __LINE__);
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} else if (isset($this->blocklist[$blockname])) {
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return new IT_Error('The block already exists.', __FILE__, __LINE__);
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}
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// find out where to insert the new block
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$parents = $this->findPlaceholderBlocks($placeholder);
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if (0 == count($parents)) {
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return new IT_Error("The variable placeholder '$placeholder' was not found in the template.", __FILE__, __LINE__);
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} else if ( count($parents) > 1 ) {
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reset($parents);
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while (list($k, $parent) = each($parents))
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$msg .= "$parent, ";
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$msg = substr($parent, -2);
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return new IT_Error("The variable placeholder '$placeholder' must be unique, found in multiple blocks '$msg'.", __FILE__, __LINE__);
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}
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$template = "<!-- BEGIN $blockname -->" . $template . "<!-- END $blockname -->";
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$this->findBlocks($template);
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if ($this->flagBlocktrouble)
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return false; // findBlocks() already throws an exception
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$this->blockinner[$parents[0]][] = $blockname;
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$this->blocklist[$parents[0]] = preg_replace('@' . $this->openingDelimiter . $placeholder . $this->closingDelimiter . '@',
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$this->openingDelimiter . '__' . $blockname . '__' . $this->closingDelimiter,
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$this->blocklist[$parents[0]]
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);
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$this->deleteFromBlockvariablelist($parents[0], $placeholder);
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$this->updateBlockvariablelist($blockname);
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/*
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// check if any inner blocks were found
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if(is_array($this->blockinner[$blockname]) and count($this->blockinner[$blockname]) > 0) {
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// loop through inner blocks, registering the variable placeholders in each
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foreach($this->blockinner[$blockname] as $childBlock) {
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$this->updateBlockvariablelist($childBlock);
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}
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}
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*/
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return true;
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} // end func addBlock
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/**
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* Adds a block taken from a file to the template changing a variable placeholder to a block placeholder.
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*
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* @param string Name of the variable placeholder to be converted
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* @param string Name of the block to be added
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* @param string File that contains the block
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* @brother addBlock()
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*/
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function addBlockfile($placeholder, $blockname, $filename) {
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return $this->addBlock($placeholder, $blockname, $this->getFile($filename));
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} // end func addBlockfile
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/**
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* Returns the name of the (first) block that contains the specified placeholder.
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*
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* @param string Name of the placeholder you're searching
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* @param string Name of the block to scan. If left out (default) all blocks are scanned.
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* @return string Name of the (first) block that contains the specified placeholder.
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* If the placeholder was not found or an error occured an empty string is returned.
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* @throws IT_Error
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* @access public
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*/
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function placeholderExists($placeholder, $block = '') {
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if ('' == $placeholder) {
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new IT_Error('No placeholder name given.', __FILE__, __LINE__);
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return '';
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}
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if ('' != $block && !isset($this->blocklist[$block])) {
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new IT_Error("Unknown block '$block'.", __FILE__, __LINE__);
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return '';
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}
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// name of the block where the given placeholder was found
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$found = '';
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if ('' != $block) {
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if (is_array($variables = $this->blockvariables[$block])) {
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// search the value in the list of blockvariables
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reset($variables);
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while (list($k, $variable) = each($variables))
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if ($variable == $placeholder) {
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$found = $block;
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break;
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}
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}
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} else {
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// search all blocks and return the name of the first block that
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// contains the placeholder
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reset($this->blockvariables);
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while (list($blockname, $variables) = each($this->blockvariables)) {
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reset($variables);
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while (list($k, $variable) = each($variables))
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if ($variable == $placeholder) {
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$found = $blockname;
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break 2;
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}
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}
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}
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return $found;
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} // end func placeholderExists
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/**
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* Checks the list of function calls in the template and calls their callback function.
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*
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* @access public
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*/
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function performCallback() {
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reset($this->functions);
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while (list($func_id, $function) = each($this->functions)) {
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if (isset($this->callback[$function['name']])) {
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if ('' != $this->callback[$function['name']]['object']) {
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$this->variableCache['__function' . $func_id . '__'] = call_user_method(
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$this->callback[$function['name']]['function'],
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$GLOBALS[$this->callback[$function['name']]['object']],
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$function['args']
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);
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} else {
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$this->variableCache['__function' . $func_id . '__'] = call_user_func(
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$this->callback[$function['name']]['function'],
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$function['args']
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);
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}
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}
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}
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} // end func performCallback
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/**
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* Returns a list of all function calls in the current template.
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*
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* @return array
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* @access public
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*/
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function getFunctioncalls() {
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return $this->functions;
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} // end func getFunctioncalls
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/**
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* Replaces a function call with the given replacement.
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*
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* @param int Function ID
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* @param string Replacement
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* @deprec
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*/
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function setFunctioncontent($functionID, $replacement) {
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$this->variableCache['__function' . $functionID . '__'] = $replacement;
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} // end func setFunctioncontent
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/**
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* Sets a callback function.
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*
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* IT[X] templates (note the X) can contain simple function calls.
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* "function call" means that the editor of the template can add
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* special placeholder to the template like 'func_h1("embedded in h1")'.
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* IT[X] will grab this function calls and allow you to define a callback
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* function for them.
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*
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* This is an absolutely evil feature. If your application makes heavy
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* use of such callbacks and you're even implementing if-then etc. on
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* the level of a template engine you're reiventing the wheel... - that's
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* actually how PHP came into life. Anyway, sometimes it's handy.
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*
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* Consider also using XML/XSLT or native PHP. And please do not push
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* IT[X] any further into this direction of adding logics to the template
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* engine.
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*
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* For those of you ready for the X in IT[X]:
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*
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* <?php
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* ...
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* function h_one($args) {
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* return sprintf('<h1>%s</h1>', $args[0]);
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* }
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*
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* ...
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* $itx = new IntegratedTemplateExtension( ... );
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* ...
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* $itx->setCallbackFunction('h1', 'h_one');
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* $itx->performCallback();
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* ?>
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*
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* template:
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* func_h1('H1 Headline');
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*
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* @param string Function name in the template
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* @param string Name of the callback function
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* @param string Name of the callback object
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* @return boolean False on failure.
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* @throws IT_Error
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* @access public
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*/
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function setCallbackFunction($tplfunction, $callbackfunction, $callbackobject = '') {
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if ('' == $tplfunction || '' == $callbackfunction)
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return new IT_Error("No template function ('$tplfunction') and/or no callback function ('$callback') given.", __FILE__, __LINE__);
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$this->callback[$tplfunction] = array(
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"function" => $callbackfunction,
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"object" => $callbackobject
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);
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return true;
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} // end func setCallbackFunction
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/**
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* Sets the Callback function lookup table
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*
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* @param array function table - array[templatefunction] = array( "function" => userfunction, "object" => userobject )
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* @access public
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*/
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function setCallbackFuntiontable($functions) {
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$this->callback = $functions;
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} // end func setCallbackFunctiontable
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/**
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* Recursively removes all data assiciated with a block, including all inner blocks
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*
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* @param string block to be removed
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*/
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function removeBlockData($block) {
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if (isset($this->blockinner[$block])) {
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foreach ($this->blockinner[$block] as $k => $inner)
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$this->removeBlockData($inner);
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unset($this->blockinner[$block]);
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}
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unset($this->blocklist[$block]);
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unset($this->blockdata[$block]);
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unset($this->blockvariables[$block]);
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unset($this->touchedBlocks[$block]);
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} // end func removeBlockinner
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/**
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* Returns a list of blocknames in the template.
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*
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* @return array [blockname => blockname]
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* @access public
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* @see blockExists()
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*/
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function getBlocklist() {
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$blocklist = array();
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foreach ($this->blocklist as $block => $content)
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$blocklist[$block] = $block;
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return $blocklist;
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} // end func getBlocklist
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/**
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* Checks wheter a block exists.
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*
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* @param string
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* @return boolean
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* @access public
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* @see getBlocklist()
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*/
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function blockExists($blockname) {
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return isset($this->blocklist[$blockname]);
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} // end func blockExists
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/**
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* Returns a list of variables of a block.
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*
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* @param string Blockname
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* @return array [varname => varname]
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* @access public
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* @see BlockvariableExists()
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*/
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function getBlockvariables($block) {
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if (!isset($this->blockvariables[$block]))
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return array();
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|
|
$variables = array();
|
|
foreach ($this->blockvariables[$block] as $variable => $v) {
|
|
$variables[$variable] = $variable;
|
|
}
|
|
|
|
return $variables;
|
|
} // end func getBlockvariables
|
|
|
|
/**
|
|
* Checks wheter a block variable exists.
|
|
*
|
|
* @param string Blockname
|
|
* @param string Variablename
|
|
* @return boolean
|
|
* @access public
|
|
* @see getBlockvariables()
|
|
*/
|
|
function BlockvariableExists($block, $variable) {
|
|
return isset($this->blockvariables[$block][$variable]);
|
|
} // end func BlockvariableExists
|
|
|
|
/**
|
|
* Builds a functionlist from the template.
|
|
*/
|
|
function buildFunctionlist() {
|
|
|
|
$this->functions = array();
|
|
|
|
$template = $this->template;
|
|
$num = 0;
|
|
|
|
while (preg_match($this->functionRegExp, $template, $regs)) {
|
|
|
|
$pos = strpos($template, $regs[0]);
|
|
$template = substr($template, $pos + strlen($regs[0]));
|
|
|
|
$head = $this->getValue($template, ')');
|
|
$args = array();
|
|
|
|
$this->template = str_replace($regs[0] . $head . ')', '{__function' . $num . '__}', $this->template);
|
|
$template = str_replace($regs[0] . $head . ')', '{__function' . $num . '__}', $template);
|
|
|
|
while ('' != $head && $arg = $this->getValue($head, ',')) {
|
|
$arg2 = trim($args2);
|
|
$args[] = ('"' == $arg2{0} || "'" == $arg2{0}) ? substr($arg2, 1, -1) : $arg2;
|
|
if ($arg == $head)
|
|
break;
|
|
$head = substr($head, strlen($arg) + 1);
|
|
}
|
|
|
|
$this->functions[$num++] = array(
|
|
'name' => $regs[1],
|
|
'args' => $args
|
|
);
|
|
}
|
|
|
|
} // end func buildFunctionlist
|
|
|
|
|
|
function getValue($code, $delimiter) {
|
|
if ('' == $code)
|
|
return '';
|
|
|
|
if (!is_array($delimiter))
|
|
$delimiter = array( $delimiter => true );
|
|
|
|
$len = strlen($code);
|
|
$enclosed = false;
|
|
$enclosed_by = '';
|
|
|
|
if (isset($delimiter[$code[0]])) {
|
|
|
|
$i = 1;
|
|
|
|
} else {
|
|
|
|
for ($i = 0; $i < $len; ++$i) {
|
|
|
|
$char = $code[$i];
|
|
|
|
if (('"' == $char || "'" == $char) && ($char == $enclosed_by || '' == $enclosed_by) && (0 == $i || ($i > 0 && '\\' != $code[$i - 1]))) {
|
|
|
|
if (!$enclosed)
|
|
$enclosed_by = $char;
|
|
else
|
|
$enclosed_by = "";
|
|
|
|
$enclosed = !$enclosed;
|
|
|
|
}
|
|
if (!$enclosed && isset($delimiter[$char]))
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return substr($code, 0, $i);
|
|
} // end func getValue
|
|
|
|
|
|
/**
|
|
* Deletes one or many variables from the block variable list.
|
|
*
|
|
* @param string Blockname
|
|
* @param mixed Name of one variable or array of variables ( array ( name => true ) ) to be stripped.
|
|
*/
|
|
function deleteFromBlockvariablelist($block, $variables) {
|
|
|
|
if (!is_array($variables))
|
|
$variables = array($variables => true);
|
|
|
|
reset($this->blockvariables[$block]);
|
|
while (list($varname, $val) = each($this->blockvariables[$block]))
|
|
if (isset($variables[$varname]))
|
|
unset($this->blockvariables[$block][$varname]);
|
|
|
|
} // end deleteFromBlockvariablelist
|
|
|
|
/**
|
|
* Updates the variable list of a block.
|
|
*
|
|
* @param string Blockname
|
|
*/
|
|
function updateBlockvariablelist($block) {
|
|
|
|
preg_match_all( $this->variablesRegExp, $this->blocklist[$block], $regs );
|
|
|
|
if (0 != count($regs[1])) {
|
|
foreach ($regs[1] as $k => $var) {
|
|
$this->blockvariables[$block][$var] = true;
|
|
}
|
|
} else {
|
|
$this->blockvariables[$block] = array();
|
|
}
|
|
|
|
// check if any inner blocks were found
|
|
if (isset($this->blockinner[$block]) and is_array($this->blockinner[$block]) and count($this->blockinner[$block]) > 0) {
|
|
// loop through inner blocks, registering the variable placeholders in each
|
|
foreach($this->blockinner[$block] as $childBlock) {
|
|
$this->updateBlockvariablelist($childBlock);
|
|
}
|
|
}
|
|
|
|
} // end func updateBlockvariablelist
|
|
|
|
/**
|
|
* Returns an array of blocknames where the given variable placeholder is used.
|
|
*
|
|
* @param string Variable placeholder
|
|
* @return array $parents parents[0..n] = blockname
|
|
*/
|
|
function findPlaceholderBlocks($variable) {
|
|
$parents = array();
|
|
reset($this->blocklist);
|
|
while (list($blockname, $content) = each($this->blocklist)) {
|
|
reset($this->blockvariables[$blockname]);
|
|
while (list($varname, $val) = each($this->blockvariables[$blockname])) {
|
|
if ($variable == $varname) {
|
|
$parents[] = $blockname;
|
|
}
|
|
}
|
|
}
|
|
|
|
return $parents;
|
|
} // end func findPlaceholderBlocks
|
|
|
|
/**
|
|
* Handles warnings, saves them to $warn and prints them or calls die() depending on the flags
|
|
* @param string Warning
|
|
* @param string File where the warning occured
|
|
* @param int Linenumber where the warning occured
|
|
* @see $warn, $printWarning, $haltOnWarning
|
|
*/
|
|
function warning($message, $file = '', $line = 0) {
|
|
|
|
$message = sprintf('IntegratedTemplateExtension Warning: %s [File: %s, Line: %d]',
|
|
$message,
|
|
$file,
|
|
$line );
|
|
|
|
$this->warn[] = $message;
|
|
|
|
if ($this->printWarning)
|
|
print $message;
|
|
|
|
if ($this->haltOnError)
|
|
die($message);
|
|
|
|
} // end func warning
|
|
|
|
} // end class IntegratedTemplateExtension
|
|
?>
|