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PHP | 484 lines | 266 code | 63 blank | 155 comment | 27 complexity | 3ac94f424f063034b5dc9a9394d8c661 MD5 | raw file
- <?php
- if (!defined('MSD_VERSION')) die('No direct access.');
- define('TPL_DEBUG',0); // used if evaluationg of template fails
- /***************************************************************************
- * template.php
- * -------------------
- * begin : Saturday, Feb 13, 2001
- * copyright : (C) 2001 The phpBB Group
- * email : support@phpbb.com
- *
- * $Id: template.php,v 1.10.2.3 2002/12/21 19:09:57 psotfx Exp $
- *
- *
- ***************************************************************************/
- /***************************************************************************
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- ***************************************************************************/
- /**
- * Template class. By Nathan Codding of the phpBB group.
- * The interface was originally inspired by PHPLib templates,
- * and the template file formats are quite similar.
- *
- */
- class MSDTemplate
- {
- var $classname="MSDTemplate";
-
- // variable that holds all the data we'll be substituting into
- // the compiled templates.
- // ...
- // This will end up being a multi-dimensional array like this:
- // $this->_tpldata[block.][iteration#][child.][iteration#][child2.][iteration#][variablename] == value
- // if it's a root-level variable, it'll be like this:
- // $this->_tpldata[.][0][varname] == value
- var $_tpldata=array();
-
- // Hash of filenames for each template handle.
- var $files=array();
-
- // Root template directory.
- var $root="";
-
- // this will hash handle names to the compiled code for that handle.
- var $compiled_code=array();
-
- // This will hold the uncompiled code for that handle.
- var $uncompiled_code=array();
-
- /**
- * Constructor. Simply sets the root dir.
- *
- */
- function MSDTemplate($root=".")
- {
- $this->set_rootdir($root);
- }
-
- /**
- * Destroys this template object. Should be called when you're done with it, in order
- * to clear out the template data so you can load/parse a new template set.
- */
- function destroy()
- {
- $this->_tpldata=array();
- }
-
- /**
- * Sets the template root directory for this Template object.
- */
- function set_rootdir($dir)
- {
- if (!is_dir($dir))
- {
- return false;
- }
- $this->root=$dir;
- return true;
- }
-
- /**
- * Sets the template filenames for handles. $filename_array
- * should be a hash of handle => filename pairs.
- */
- function set_filenames($filename_array)
- {
- if (!is_array($filename_array))
- {
- return false;
- }
-
- reset($filename_array);
- while (list ($handle, $filename)=each($filename_array))
- {
- $this->files[$handle]=$this->make_filename($filename);
- }
-
- return true;
- }
-
- /**
- * Load the file for the handle, compile the file,
- * and run the compiled code. This will print out
- * the results of executing the template.
- */
- function pparse($handle)
- {
- // Edit DSB: autimatically assign language vars
- global $lang;
- $this->assign_vars($lang);
-
- if (!$this->loadfile($handle))
- {
- die("Template->pparse(): Couldn't load template file for handle $handle");
- }
-
- // actually compile the template now.
- if (!isset($this->compiled_code[$handle]) || empty($this->compiled_code[$handle]))
- {
- // Actually compile the code now.
- $this->compiled_code[$handle]=$this->compile($this->uncompiled_code[$handle]);
- }
-
- // Run the compiled code.
- if (defined(TPL_DEBUG) && TPL_DEBUG>0) echo '<pre>'.htmlspecialchars($this->compiled_code[$handle]).'</pre>';
- eval($this->compiled_code[$handle]);
- return true;
- }
-
- /**
- * Inserts the uncompiled code for $handle as the
- * value of $varname in the root-level. This can be used
- * to effectively include a template in the middle of another
- * template.
- * Note that all desired assignments to the variables in $handle should be done
- * BEFORE calling this function.
- */
- function assign_var_from_handle($varname, $handle)
- {
- if (!$this->loadfile($handle))
- {
- die("Template->assign_var_from_handle(): Couldn't load template file for handle $handle");
- }
-
- // Compile it, with the "no echo statements" option on.
- $_str="";
- $code=$this->compile($this->uncompiled_code[$handle],true,'_str');
-
- // evaluate the variable assignment.
- eval($code);
- // assign the value of the generated variable to the given varname.
- $this->assign_var($varname,$_str);
-
- return true;
- }
-
- /**
- * Block-level variable assignment. Adds a new block iteration with the given
- * variable assignments. Note that this should only be called once per block
- * iteration.
- */
- function assign_block_vars($blockname, $vararray)
- {
- if (strstr($blockname,'.'))
- {
- // Nested block.
- $blocks=explode('.',$blockname);
- $blockcount=sizeof($blocks) - 1;
- $str='$this->_tpldata';
- for ($i=0; $i < $blockcount; $i++)
- {
- $str.='[\'' . $blocks[$i] . '.\']';
- eval('$lastiteration = sizeof(' . $str . ') - 1;');
- $str.='[' . $lastiteration . ']';
- }
- // Now we add the block that we're actually assigning to.
- // We're adding a new iteration to this block with the given
- // variable assignments.
- $str.='[\'' . $blocks[$blockcount] . '.\'][] = $vararray;';
-
- // Now we evaluate this assignment we've built up.
- eval($str);
- }
- else
- {
- // Top-level block.
- // Add a new iteration to this block with the variable assignments
- // we were given.
- $this->_tpldata[$blockname . '.'][]=$vararray;
- }
-
- return true;
- }
-
- /**
- * Root-level variable assignment. Adds to current assignments, overriding
- * any existing variable assignment with the same name.
- */
- function assign_vars($vararray)
- {
- global $lang;
- while (list ($key, $val)=each($vararray))
- {
- $this->_tpldata['.'][0][$key]=$val;
- }
-
- return true;
- }
-
- /**
- * Root-level variable assignment. Adds to current assignments, overriding
- * any existing variable assignment with the same name.
- */
- function assign_var($varname, $varval)
- {
- $this->_tpldata['.'][0][$varname]=$varval;
-
- return true;
- }
-
- /**
- * Generates a full path+filename for the given filename, which can either
- * be an absolute name, or a name relative to the rootdir for this Template
- * object.
- */
- function make_filename($filename)
- {
- // Check if it's an absolute or relative path.
- /*
- if (substr($filename, 0, 1) != '/')
- {
- $filename = $this->root . '/' . $filename;
- }
- */
- if (!file_exists($filename))
- {
- die("Template->make_filename(): Error - file $filename does not exist");
- }
-
- return $filename;
- }
-
- /**
- * If not already done, load the file for the given handle and populate
- * the uncompiled_code[] hash with its code. Do not compile.
- */
- function loadfile($handle)
- {
- // If the file for this handle is already loaded and compiled, do nothing.
- if (isset($this->uncompiled_code[$handle]) && !empty($this->uncompiled_code[$handle]))
- {
- return true;
- }
-
- // If we don't have a file assigned to this handle, die.
- if (!isset($this->files[$handle]))
- {
- die("Template->loadfile(): No file specified for handle $handle");
- }
-
- $filename=$this->files[$handle];
-
- $str=implode("",@file($filename));
- if (empty($str))
- {
- die("Template->loadfile(): File $filename for handle $handle is empty");
- }
-
- $this->uncompiled_code[$handle]=$str;
-
- return true;
- }
-
- /**
- * Compiles the given string of code, and returns
- * the result in a string.
- * If "do_not_echo" is true, the returned code will not be directly
- * executable, but can be used as part of a variable assignment
- * for use in assign_code_from_handle().
- */
- function compile($code, $do_not_echo=false, $retvar='')
- {
- // replace \ with \\ and then ' with \'.
- $code=str_replace('\\','\\\\',$code);
- $code=str_replace('\'','\\\'',$code);
-
- // change template varrefs into PHP varrefs
-
- // This one will handle varrefs WITH namespaces
- $varrefs=array();
- preg_match_all('#\{(([a-z0-9\-_]+?\.)+?)([a-z0-9\-_]+?)\}#is',$code,$varrefs);
- $varcount=sizeof($varrefs[1]);
- for ($i=0; $i < $varcount; $i++)
- {
- $namespace=$varrefs[1][$i];
- $varname=$varrefs[3][$i];
- $new=$this->generate_block_varref($namespace,$varname);
-
- $code=str_replace($varrefs[0][$i],$new,$code);
- }
-
- // This will handle the remaining root-level varrefs
- $code=preg_replace('#\{([a-z0-9\-_]*?)\}#is','\' . ( ( isset($this->_tpldata[\'.\'][0][\'\1\']) ) ? $this->_tpldata[\'.\'][0][\'\1\'] : \'\' ) . \'',$code);
-
- // Break it up into lines.
- $code_lines=explode("\n",$code);
-
- $block_nesting_level=0;
- $block_names=array();
- $block_names[0]=".";
-
- // Second: prepend echo ', append ' . "\n"; to each line.
- $line_count=sizeof($code_lines);
- for ($i=0; $i < $line_count; $i++)
- {
- $code_lines[$i]=chop($code_lines[$i]);
- if (preg_match('#<!-- BEGIN (.*?) -->#',$code_lines[$i],$m))
- {
- $n[0]=$m[0];
- $n[1]=$m[1];
-
- // Added: dougk_ff7-Keeps templates from bombing if begin is on the same line as end.. I think. :)
- if (preg_match('#<!-- END (.*?) -->#',$code_lines[$i],$n))
- {
- $block_nesting_level++;
- $block_names[$block_nesting_level]=$m[1];
- if ($block_nesting_level < 2)
- {
- // Block is not nested.
- $code_lines[$i]='$_' . $n[1] . '_count = ( isset($this->_tpldata[\'' . $n[1] . '.\']) ) ? sizeof($this->_tpldata[\'' . $n[1] . '.\']) : 0;';
- $code_lines[$i].="\n" . 'for ($_' . $n[1] . '_i = 0; $_' . $n[1] . '_i < $_' . $n[1] . '_count; $_' . $n[1] . '_i++)';
- $code_lines[$i].="\n" . '{';
- }
- else
- {
- // This block is nested.
-
- // Generate a namespace string for this block.
- $namespace=implode('.',$block_names);
- // strip leading period from root level..
- $namespace=substr($namespace,2);
- // Get a reference to the data array for this block that depends on the
- // current indices of all parent blocks.
- $varref=$this->generate_block_data_ref($namespace,false);
- // Create the for loop code to iterate over this block.
- $code_lines[$i]='$_' . $n[1] . '_count = ( isset(' . $varref . ') ) ? sizeof(' . $varref . ') : 0;';
- $code_lines[$i].="\n" . 'for ($_' . $n[1] . '_i = 0; $_' . $n[1] . '_i < $_' . $n[1] . '_count; $_' . $n[1] . '_i++)';
- $code_lines[$i].="\n" . '{';
- }
-
- // We have the end of a block.
- unset($block_names[$block_nesting_level]);
- $block_nesting_level--;
- $code_lines[$i].='} // END ' . $n[1];
- $m[0]=$n[0];
- $m[1]=$n[1];
- }
- else
- {
- // We have the start of a block.
- $block_nesting_level++;
- $block_names[$block_nesting_level]=$m[1];
- if ($block_nesting_level < 2)
- {
- // Block is not nested.
- $code_lines[$i]='$_' . $m[1] . '_count = ( isset($this->_tpldata[\'' . $m[1] . '.\']) ) ? sizeof($this->_tpldata[\'' . $m[1] . '.\']) : 0;';
- $code_lines[$i].="\n" . 'for ($_' . $m[1] . '_i = 0; $_' . $m[1] . '_i < $_' . $m[1] . '_count; $_' . $m[1] . '_i++)';
- $code_lines[$i].="\n" . '{';
- }
- else
- {
- // This block is nested.
-
- // Generate a namespace string for this block.
- $namespace=implode('.',$block_names);
- // strip leading period from root level..
- $namespace=substr($namespace,2);
- // Get a reference to the data array for this block that depends on the
- // current indices of all parent blocks.
- $varref=$this->generate_block_data_ref($namespace,false);
- // Create the for loop code to iterate over this block.
- $code_lines[$i]='$_' . $m[1] . '_count = ( isset(' . $varref . ') ) ? sizeof(' . $varref . ') : 0;';
- $code_lines[$i].="\n" . 'for ($_' . $m[1] . '_i = 0; $_' . $m[1] . '_i < $_' . $m[1] . '_count; $_' . $m[1] . '_i++)';
- $code_lines[$i].="\n" . '{';
- }
- }
- }
- else if (preg_match('#<!-- END (.*?) -->#',$code_lines[$i],$m))
- {
- // We have the end of a block.
- unset($block_names[$block_nesting_level]);
- $block_nesting_level--;
- $code_lines[$i]='} // END ' . $m[1];
- }
- else
- {
- // We have an ordinary line of code.
- if (!$do_not_echo)
- {
- $code_lines[$i]='echo \'' . $code_lines[$i] . '\' . "\\n";';
- }
- else
- {
- $code_lines[$i]='$' . $retvar . '.= \'' . $code_lines[$i] . '\' . "\\n";';
- }
- }
- }
-
- // Bring it back into a single string of lines of code.
- $code=implode("\n",$code_lines);
- return $code;
-
- }
-
- /**
- * 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='\' . ( ( isset(' . $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] . '.\'][$_' . $blocks[$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)
- {
- $varref.='[$_' . $blocks[$blockcount] . '_i]';
- }
-
- return $varref;
- }
- }
- ?>