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694 lines
19 KiB
PHP
694 lines
19 KiB
PHP
<?php
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/***************************************************************************
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* template.php
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* -------------------
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* begin : Saturday, Feb 13, 2001
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* copyright : (C) 2001 The phpBB Group
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* email : support@phpbb.com
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*
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* $Id$
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*
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***************************************************************************/
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/***************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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***************************************************************************/
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/*
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Template class.
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Nathan Codding - Original version design and implementation
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Crimsonbane - Initial caching proposal and work
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psoTFX - Completion of file caching, decompilation routines and implementation of
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conditionals/keywords and associated changes
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The interface was inspired by PHPLib templates, and the template file (formats are
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quite similar)
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The keyword/conditional implementation is currently based on sections of code from
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the Smarty templating engine (c) 2001 ispi of Lincoln, Inc. which is released
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(on its own and in whole) under the LGPL. Section 3 of the LGPL states that any code
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derived from an LGPL application may be relicenced under the GPL, this applies
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to this source
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*/
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// Changes for 2.2:
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//
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// * Allow use of Smarty plug-ins?
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// * Reduce number of methods and variables
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class Template {
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var $classname = 'Template';
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// variable that holds all the data we'll be substituting into
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// the compiled templates. Takes form:
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// --> $this->_tpldata[block.][iteration#][child.][iteration#][child2.][iteration#][variablename] == value
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// if it's a root-level variable, it'll be like this:
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// --> $this->_tpldata[.][0][varname] == value
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var $_tpldata = array();
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// Root dir and hash of filenames for each template handle.
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var $root = '';
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var $cache_root = 'cache/templates/';
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var $files = array();
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// this will hash handle names to the compiled/uncompiled code for that handle.
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var $compiled_code = array();
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var $uncompiled_code = array();
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// Various counters and storage arrays
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var $block_names = array();
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var $block_else_level = array();
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var $include_counter = 1;
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var $block_nesting_level = 0;
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function set_template($template = '')
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{
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global $phpbb_root_path;
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$this->root = $phpbb_root_path . 'templates/' . $template;
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$this->cachedir = $phpbb_root_path . $this->cache_root . $template . '/';
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if (!file_exists($this->cachedir))
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{
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@umask(0);
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mkdir($this->cachedir, 0777);
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}
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return true;
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}
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// Sets the template filenames for handles. $filename_array
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// should be a hash of handle => filename pairs.
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function set_filenames($filename_array)
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{
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if (!is_array($filename_array))
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{
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return false;
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}
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$template_names = '';
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foreach ($filename_array as $handle => $filename)
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{
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if (empty($filename))
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{
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trigger_error("Template error - Empty filename specified for $handle", E_USER_ERROR);
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}
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$this->filename[$handle] = $filename;
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$this->files[$handle] = $this->make_filename($filename);
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}
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return true;
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}
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// Generates a full path+filename for the given filename, which can either
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// be an absolute name, or a name relative to the rootdir for this Template
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// object.
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function make_filename($filename)
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{
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// Check if it's an absolute or relative path.
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return (substr($filename, 0, 1) != '/') ? $this->root . '/' . $filename : $filename;
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}
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/**
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* If not already done, load the file for the given handle and populate
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* the uncompiled_code[] hash with its code. Do not compile.
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*/
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function loadfile($handle)
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{
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// If the file for this handle is already loaded and compiled, do nothing.
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if (!empty($this->uncompiled_code[$handle]))
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{
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return true;
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}
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// If we don't have a file assigned to this handle, die.
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if (!isset($this->files[$handle]))
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{
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trigger_error("Template->loadfile(): No file specified for handle $handle", E_USER_ERROR);
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}
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if (!($fp = @fopen($this->files[$handle], 'r')))
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{
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trigger_error("Template->loadfile(): Error - file $filename does not exist or is empty", E_USER_ERROR);
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}
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$str = '';
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$str = fread($fp, filesize($this->files[$handle]));
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@fclose($fp);
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$this->uncompiled_code[$handle] = trim($str);
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return true;
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}
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/**
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* Destroys this template object. Should be called when you're done with it, in order
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* to clear out the template data so you can load/parse a new template set.
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*/
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function destroy()
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{
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$this->_tpldata = array();
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}
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//
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// Methods for loading and evaluating the templates
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//
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function display($handle)
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{
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if (!$this->compile_load($handle, true))
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{
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global $user, $phpEx;
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if (!$this->loadfile($handle))
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{
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trigger_error("Template->display(): Couldn't load template file for handle $handle", E_USER_ERROR);
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}
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// Actually compile the code now.
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$this->compiled_code[$handle] = $this->compile($this->uncompiled_code[$handle]);
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$this->compile_write($handle, $this->compiled_code[$handle]);
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eval($this->compiled_code[$handle]);
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}
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return true;
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}
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function compile_load(&$handle, $include = true)
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{
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global $phpEx, $user;
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$filename = $this->cachedir . $this->filename[$handle] . '.' . $phpEx;
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// Recompile page if the original template is newer, otherwise load the compiled version
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if (file_exists($filename) && @filemtime($filename) >= @filemtime($this->files[$handle]))
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{
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if ($include)
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{
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include($filename);
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}
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return true;
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}
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return false;
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}
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/**
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* Root-level variable assignment. Adds to current assignments, overriding
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* any existing variable assignment with the same name.
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*/
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function assign_vars($vararray)
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{
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foreach ($vararray as $key => $val)
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{
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$this->_tpldata['.'][0][$key] = $val;
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}
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return true;
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}
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/**
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* Root-level variable assignment. Adds to current assignments, overriding
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* any existing variable assignment with the same name.
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*/
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function assign_var($varname, $varval)
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{
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$this->_tpldata['.'][0][$varname] = $varval;
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return true;
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}
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/**
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* Block-level variable assignment. Adds a new block iteration with the given
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* variable assignments. Note that this should only be called once per block
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* iteration.
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*/
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function assign_block_vars($blockname, $vararray)
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{
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if (strstr($blockname, '.'))
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{
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// Nested block.
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$blocks = explode('.', $blockname);
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$blockcount = sizeof($blocks) - 1;
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$str = &$this->_tpldata;
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for ($i = 0; $i < $blockcount; $i++)
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{
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$str = &$str[$blocks[$i] . '.'];
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$str = &$str[sizeof($str) - 1];
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}
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// Now we add the block that we're actually assigning to.
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// We're adding a new iteration to this block with the given
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// variable assignments.
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$str[$blocks[$blockcount] . '.'][] = $vararray;
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}
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else
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{
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// Top-level block.
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// Add a new iteration to this block with the variable assignments
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// we were given.
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$this->_tpldata[$blockname . '.'][] = $vararray;
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}
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return true;
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}
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// Additional methods
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function _tpl_include($filename, $include = true)
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{
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$handle = $filename;
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$this->filename[$handle] = $filename;
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$this->files[$handle] = $this->make_filename($filename);
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if (!($this->compile_load($handle, $include)))
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{
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global $user, $phpEx;
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if (!$this->loadfile($handle))
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{
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trigger_error("Template->_tpl_include(): Couldn't load template file for handle $handle", E_USER_ERROR);
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}
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$this->compiled_code[$handle] = $this->compile($this->uncompiled_code[$handle]);
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$this->compile_write($handle, $this->compiled_code[$handle]);
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}
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}
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/**
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* Compiles the given string of code, and returns
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* the result in a string.
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* If "do_not_echo" is true, the returned code will not be directly
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* executable, but can be used as part of a variable assignment
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* for use in assign_code_from_handle().
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*
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* Parts of this where inspired by Smarty
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*/
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function compile($code, $do_not_echo = false, $retvar = '')
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{
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// Pull out all block/statement level elements and seperate
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// plain text
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preg_match_all('#<!-- PHP -->(.*?)<!-- ENDPHP -->#s', $code, $matches);
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$php_blocks = $matches[1];
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$code = preg_replace('#<!-- PHP -->(.*?)<!-- ENDPHP -->#s', '<!-- PHP -->', $code);
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preg_match_all('#<!-- INCLUDE (.*?) -->#s', $code, $matches);
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$include_blocks = $matches[1];
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$code = preg_replace('#<!-- INCLUDE (.*?) -->#s', '<!-- INCLUDE -->', $code);
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preg_match_all('#<!-- (.*?) (.*?)?[ ]?-->#s', $code, $blocks);
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$text_blocks = preg_split('#<!-- (.*?) (.*?)?[ ]?-->#s', $code);
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for($i = 0; $i < count($text_blocks); $i++)
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{
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$this->compile_var_tags($text_blocks[$i]);
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}
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$compile_blocks = array();
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for ($curr_tb = 0; $curr_tb < count($text_blocks); $curr_tb++)
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{
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switch ($blocks[1][$curr_tb])
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{
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case 'BEGIN':
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$this->block_else_level[] = false;
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$compile_blocks[] = '// BEGIN ' . $blocks[2][$curr_tb] . "\n" . $this->compile_tag_block($blocks[2][$curr_tb]);
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break;
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case 'BEGINELSE':
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$this->block_else_level[sizeof($this->block_else_level) - 1] = true;
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$compile_blocks[] = "// BEGINELSE\n}} else {\n";
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break;
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case 'END':
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$compile_blocks[] = ((array_pop($this->block_else_level)) ? "}\n" : "}}\n") . '// END ' . array_pop($this->block_names) . "\n";
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break;
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case 'IF':
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$compile_blocks[] = '// IF ' . $blocks[2][$curr_tb] . "\n" . $this->compile_tag_if($blocks[2][$curr_tb], false);
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break;
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case 'ELSE':
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$compile_blocks[] = "// ELSE\n} else {\n";
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break;
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case 'ELSEIF':
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$compile_blocks[] = '// ELSEIF ' . $blocks[2][$curr_tb] . "\n" . $this->compile_tag_if($blocks[2][$curr_tb], true);
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break;
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case 'ENDIF':
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$compile_blocks[] = "// ENDIF\n}\n";
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break;
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case 'INCLUDE':
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$temp = '';
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list(, $temp) = each($include_blocks);
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$compile_blocks[] = "// INCLUDE $temp\n\$this->_tpl_include('$temp');\n";
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$this->_tpl_include($temp, false);
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break;
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/* case 'INCLUDEPHP':
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$compile_blocks[] = '// INCLUDEPHP ' . $blocks[2][$curr_tb] . "\n" . $this->compile_tag_include_php($blocks[2][$curr_tb]);
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break;
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case 'PHP':
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$temp = '';
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list(, $temp) = each($php_blocks);
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$compile_blocks[] = "// PHP START\n" . $temp . "\n// PHP END\n";
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break;*/
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default:
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$this->compile_var_tags($blocks[0][$curr_tb]);
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$trim_check = trim($blocks[0][$curr_tb]);
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$compile_blocks[] = (!$do_not_echo) ? ((!empty($trim_check)) ? 'echo \'' . $blocks[0][$curr_tb] . '\';' : '') : ((!empty($trim_check)) ? $blocks[0][$curr_tb] : '');
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break;
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}
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}
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$template_php = '';
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for ($i = 0; $i < count($text_blocks); $i++)
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{
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$trim_check_text = trim($text_blocks[$i]);
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$trim_check_block = trim($compile_blocks[$i]);
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$template_php .= (!$do_not_echo) ? ((!empty($trim_check_text)) ? 'echo \'' . $text_blocks[$i] . '\';' : '') . ((!empty($compile_blocks[$i])) ? $compile_blocks[$i] : '') : ((!empty($trim_check_text)) ? $text_blocks[$i] . "\n" : '') . ((!empty($compile_blocks[$i])) ? $compile_blocks[$i] . "\n" : '');
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}
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return (!$do_not_echo) ? $template_php : '$' . $retvar . '.= \'' . $template_php . '\'';
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}
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function compile_var_tags(&$text_blocks)
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{
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// change template varrefs into PHP varrefs
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$varrefs = array();
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$text_blocks = str_replace('\\', '\\\\', $text_blocks);
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$text_blocks = str_replace('\'', '\\\'', $text_blocks);
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// This one will handle varrefs WITH namespaces
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preg_match_all('#\{(([a-z0-9\-_]+?\.)+?)([a-z0-9\-_]+?)\}#is', $text_blocks, $varrefs);
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for ($j = 0; $j < sizeof($varrefs[1]); $j++)
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{
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$namespace = $varrefs[1][$j];
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$varname = $varrefs[3][$j];
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$new = $this->generate_block_varref($namespace, $varname);
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$text_blocks = str_replace($varrefs[0][$j], $new, $text_blocks);
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}
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// This will handle the remaining root-level varrefs
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$text_blocks = preg_replace('#\{L_([a-z0-9\-_]*?)\}#is', "' . ((isset(\$this->_tpldata['.'][0]['L_\\1'])) ? \$this->_tpldata['.'][0]['L_\\1'] : ((isset(\$user->lang['\\1'])) ? \$user->lang['\\1'] : '{ ' . ucfirst(strtolower(str_replace('_', ' ', '\\1'))) . ' }')) . '", $text_blocks);
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$text_blocks = preg_replace('#\{([a-z0-9\-_]*?)\}#is', "' . ((isset(\$this->_tpldata['.'][0]['\\1'])) ? \$this->_tpldata['.'][0]['\\1'] : '') . '", $text_blocks);
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return;
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}
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function compile_tag_block($tag_args)
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{
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$tag_template_php = '';
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array_push($this->block_names, $tag_args);
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if (sizeof($this->block_names) < 2)
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{
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// Block is not nested.
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$tag_template_php = '$_' . $tag_args . '_count = (isset($this->_tpldata[\'' . $tag_args . '.\'])) ? sizeof($this->_tpldata[\'' . $tag_args . '.\']) : 0;' . "\n";
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$tag_template_php .= 'if ($_' . $tag_args . '_count) {' . "\n";
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$tag_template_php .= 'for ($this->_' . $tag_args . '_i = 0; $this->_' . $tag_args . '_i < $_' . $tag_args . '_count; $this->_' . $tag_args . '_i++)';
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}
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else
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{
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// This block is nested.
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// Generate a namespace string for this block.
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$namespace = implode('.', $this->block_names);
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// Get a reference to the data array for this block that depends on the
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// current indices of all parent blocks.
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$varref = $this->generate_block_data_ref($namespace, false);
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// Create the for loop code to iterate over this block.
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$tag_template_php = '$_' . $tag_args . '_count = (isset(' . $varref . ')) ? sizeof(' . $varref . ') : 0;' . "\n";
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$tag_template_php .= 'if ($_' . $tag_args . '_count) {' . "\n";
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$tag_template_php .= 'for ($this->_' . $tag_args . '_i = 0; $this->_' . $tag_args . '_i < $_' . $tag_args . '_count; $this->_' . $tag_args . '_i++)';
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}
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$tag_template_php .= "\n{\n";
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return $tag_template_php;
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}
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//
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// Compile IF tags - much of this is from Smarty with
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// some adaptions for our block level methods
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//
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function compile_tag_if($tag_args, $elseif)
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{
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/* Tokenize args for 'if' tag. */
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preg_match_all('/(?:
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"[^"\\\\]*(?:\\\\.[^"\\\\]*)*" |
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\'[^\'\\\\]*(?:\\\\.[^\'\\\\]*)*\' |
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[(),] |
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[^\s(),]+)/x', $tag_args, $match);
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$tokens = $match[0];
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$is_arg_stack = array();
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for ($i = 0; $i < count($tokens); $i++)
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{
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$token = &$tokens[$i];
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switch ($token)
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{
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case 'eq':
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$token = '==';
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break;
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case 'ne':
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case 'neq':
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$token = '!=';
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break;
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case 'lt':
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$token = '<';
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break;
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case 'le':
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case 'lte':
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$token = '<=';
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break;
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case 'gt':
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$token = '>';
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break;
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case 'ge':
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case 'gte':
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$token = '>=';
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break;
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case 'and':
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$token = '&&';
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break;
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case 'or':
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$token = '||';
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break;
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case 'not':
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$token = '!';
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break;
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case 'mod':
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$token = '%';
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break;
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case '(':
|
|
array_push($is_arg_stack, $i);
|
|
break;
|
|
|
|
case 'is':
|
|
$is_arg_start = ($tokens[$i-1] == ')') ? array_pop($is_arg_stack) : $i-1;
|
|
$is_arg = implode(' ', array_slice($tokens, $is_arg_start, $i - $is_arg_start));
|
|
|
|
$new_tokens = $this->_parse_is_expr($is_arg, array_slice($tokens, $i+1));
|
|
|
|
array_splice($tokens, $is_arg_start, count($tokens), $new_tokens);
|
|
|
|
$i = $is_arg_start;
|
|
|
|
default:
|
|
if (preg_match('#^(([a-z0-9\-_]+?\.)+?)?([A-Z]+[A-Z0-9\-_]+?)$#s', $token, $varrefs))
|
|
{
|
|
$token = (!empty($varrefs[1])) ? $this->generate_block_data_ref(substr($varrefs[1], 0, strlen($varrefs[1]) - 1), true) . '[\'' . $varrefs[3] . '\']' : '$this->_tpldata[\'.\'][0][\'' . $varrefs[3] . '\']';
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
return (($elseif) ? '} elseif (' : 'if (') . (implode(' ', $tokens) . ') { ' . "\n");
|
|
}
|
|
|
|
function compile_tag_include($tag_args)
|
|
{
|
|
return "\$this->assign_from_include('$tag_args');\n";
|
|
}
|
|
|
|
function compile_tag_include_php($tag_args)
|
|
{
|
|
return "include('" . $this->root . '/' . $tag_args . "');\n";
|
|
}
|
|
|
|
// This is from Smarty
|
|
function _parse_is_expr($is_arg, $tokens)
|
|
{
|
|
$expr_end = 0;
|
|
$negate_expr = false;
|
|
|
|
if (($first_token = array_shift($tokens)) == 'not')
|
|
{
|
|
$negate_expr = true;
|
|
$expr_type = array_shift($tokens);
|
|
}
|
|
else
|
|
{
|
|
$expr_type = $first_token;
|
|
}
|
|
|
|
switch ($expr_type)
|
|
{
|
|
case 'even':
|
|
if (@$tokens[$expr_end] == 'by')
|
|
{
|
|
$expr_end++;
|
|
$expr_arg = $tokens[$expr_end++];
|
|
$expr = "!(($is_arg / $expr_arg) % $expr_arg)";
|
|
}
|
|
else
|
|
{
|
|
$expr = "!($is_arg % 2)";
|
|
}
|
|
break;
|
|
|
|
case 'odd':
|
|
if (@$tokens[$expr_end] == 'by')
|
|
{
|
|
$expr_end++;
|
|
$expr_arg = $tokens[$expr_end++];
|
|
$expr = "(($is_arg / $expr_arg) % $expr_arg)";
|
|
}
|
|
else
|
|
{
|
|
$expr = "($is_arg % 2)";
|
|
}
|
|
break;
|
|
|
|
case 'div':
|
|
if (@$tokens[$expr_end] == 'by')
|
|
{
|
|
$expr_end++;
|
|
$expr_arg = $tokens[$expr_end++];
|
|
$expr = "!($is_arg % $expr_arg)";
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if ($negate_expr)
|
|
{
|
|
$expr = "!($expr)";
|
|
}
|
|
|
|
array_splice($tokens, 0, $expr_end, $expr);
|
|
|
|
return $tokens;
|
|
}
|
|
|
|
/**
|
|
* Generates a reference to the given variable inside the given (possibly nested)
|
|
* block namespace. This is a string of the form:
|
|
* ' . $this->_tpldata['parent'][$_parent_i]['$child1'][$_child1_i]['$child2'][$_child2_i]...['varname'] . '
|
|
* It's ready to be inserted into an "echo" line in one of the templates.
|
|
* NOTE: expects a trailing "." on the namespace.
|
|
*/
|
|
function generate_block_varref($namespace, $varname)
|
|
{
|
|
// Strip the trailing period.
|
|
$namespace = substr($namespace, 0, strlen($namespace) - 1);
|
|
|
|
// Get a reference to the data block for this namespace.
|
|
$varref = $this->generate_block_data_ref($namespace, true);
|
|
// Prepend the necessary code to stick this in an echo line.
|
|
|
|
// Append the variable reference.
|
|
$varref .= "['$varname']";
|
|
$varref = "' . $varref . '";
|
|
|
|
return $varref;
|
|
|
|
}
|
|
|
|
/**
|
|
* Generates a reference to the array of data values for the given
|
|
* (possibly nested) block namespace. This is a string of the form:
|
|
* $this->_tpldata['parent'][$_parent_i]['$child1'][$_child1_i]['$child2'][$_child2_i]...['$childN']
|
|
*
|
|
* If $include_last_iterator is true, then [$_childN_i] will be appended to the form shown above.
|
|
* NOTE: does not expect a trailing "." on the blockname.
|
|
*/
|
|
function generate_block_data_ref($blockname, $include_last_iterator)
|
|
{
|
|
// Get an array of the blocks involved.
|
|
$blocks = explode('.', $blockname);
|
|
$blockcount = sizeof($blocks) - 1;
|
|
$varref = '$this->_tpldata';
|
|
|
|
// Build up the string with everything but the last child.
|
|
for ($i = 0; $i < $blockcount; $i++)
|
|
{
|
|
$varref .= "['" . $blocks[$i] . ".'][\$this->_" . $blocks[$i] . '_i]';
|
|
}
|
|
|
|
// Add the block reference for the last child.
|
|
$varref .= "['" . $blocks[$blockcount] . ".']";
|
|
|
|
// Add the iterator for the last child if requried.
|
|
if ($include_last_iterator)
|
|
{
|
|
$varref .= '[$this->_' . $blocks[$blockcount] . '_i]';
|
|
}
|
|
|
|
return $varref;
|
|
}
|
|
|
|
function compile_write(&$handle, $data)
|
|
{
|
|
global $phpEx;
|
|
|
|
$filename = $this->cachedir . $this->filename[$handle] . '.' . $phpEx;
|
|
|
|
$data = "<?php\n$data\n?>";
|
|
|
|
if ($fp = @fopen($filename, 'w+'))
|
|
{
|
|
@flock($fp, LOCK_EX);
|
|
@fwrite ($fp, $data);
|
|
@flock($fp, LOCK_UN);
|
|
@fclose($fp);
|
|
|
|
@touch($filename, filemtime($this->files[$handle]));
|
|
@umask(0);
|
|
@chmod($filename, 0644);
|
|
}
|
|
|
|
return;
|
|
}
|
|
}
|
|
|
|
?>
|