mirror of
https://github.com/phpbb/phpbb.git
synced 2025-02-21 01:42:30 +01:00
447 lines
13 KiB
PHP
447 lines
13 KiB
PHP
<?php
|
|
/***************************************************************************
|
|
* template.inc
|
|
* -------------------
|
|
* begin : Saturday, Feb 13, 2001
|
|
* copyright : (C) 2001 The phpBB Group
|
|
* email : support@phpbb.com
|
|
*
|
|
* $Id$
|
|
*
|
|
*
|
|
***************************************************************************/
|
|
|
|
/***************************************************************************
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
|
|
// global 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:
|
|
// $_tpldata[block.][iteration#][child.][iteration#][child2.][iteration#][variablename] == value
|
|
// if it's a root-level variable, it'll be like this:
|
|
// $_tpldata[.][0][varname] == value
|
|
|
|
if (!isset($_tpldata))
|
|
{
|
|
$_tpldata = array();
|
|
}
|
|
|
|
|
|
class Template {
|
|
var $classname = "Template";
|
|
|
|
// 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 $uncompiled_code = array();
|
|
|
|
/**
|
|
* Constructor. Simply sets the root dir.
|
|
*
|
|
*/
|
|
function Template($root = ".")
|
|
{
|
|
$this->set_rootdir($root);
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
global $_tpldata;
|
|
|
|
if (!$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[$handle]);
|
|
}
|
|
|
|
// Run the compiled code.
|
|
eval($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)
|
|
{
|
|
global $_tpldata;
|
|
if (!$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.
|
|
$code = $this->compile($this->uncompiled_code[$handle], true);
|
|
// turn it into a variable assignment.
|
|
$code = '$_str = \'' . $code . '\';';
|
|
|
|
// evaluate the variable assignment.
|
|
eval($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)
|
|
{
|
|
global $_tpldata;
|
|
|
|
if (strstr($blockname, '.'))
|
|
{
|
|
// Nested block.
|
|
$blocks = explode('.', $blockname);
|
|
$blockcount = sizeof($blocks) - 1;
|
|
$str = '$_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.
|
|
$_tpldata[$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 $_tpldata;
|
|
|
|
reset ($vararray);
|
|
while (list($key, $val) = each($vararray))
|
|
{
|
|
$_tpldata['.'][0][$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)
|
|
{
|
|
global $_tpldata;
|
|
|
|
$_tpldata['.'][0][$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)
|
|
{
|
|
global $_tpldata;
|
|
|
|
// If the file for this handle is already loaded and compiled, do nothing.
|
|
if (isset($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)
|
|
{
|
|
global $_tpldata;
|
|
|
|
// 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', '\' . $_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))
|
|
{
|
|
// 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] = '$_' . $m[1] . '_count = sizeof($_tpldata[\'' . $m[1] . '.\']);';
|
|
$code_lines[$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 = sizeof(' . $varref . ');';
|
|
$code_lines[$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";';
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
// 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:
|
|
* ' . $_tpldata['parent'][$_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.
|
|
$varref = '\' . ' . $varref;
|
|
// Append the variable reference.
|
|
$varref .= '[\'' . $varname . '\'] . \'';
|
|
|
|
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:
|
|
* $_tpldata['parent'][$_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;
|
|
$varref = '$_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;
|
|
}
|
|
|
|
}
|
|
?>
|