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<?php// +-----------------------------------------------------------------------+// | PhpWebGallery - a PHP based picture gallery |// | Copyright (C) 2002-2003 Pierrick LE GALL - pierrick@phpwebgallery.net |// | Copyright (C) 2003-2005 PhpWebGallery Team - http://phpwebgallery.net |// +-----------------------------------------------------------------------+// | branch : BSF (Best So Far)// | file : $RCSfile: template.php,v $// | last update : $Date: 2005/03/12 10:51:08 $// | last modifier : $Author: plg $// | revision : $Revision: 1.8 $// +-----------------------------------------------------------------------+// | 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 |// | |// | This program is distributed in the hope that it will be useful, but |// | WITHOUT ANY WARRANTY; without even the implied warranty of |// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |// | General Public License for more details. |// | |// | You should have received a copy of the GNU General Public License |// | along with this program; if not, write to the Free Software |// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |// | USA. |// +-----------------------------------------------------------------------+/*** 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 Template {var $classname = "Template";// 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] == valuevar $_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();// outputvar $output = '';/*** Constructor. Simply sets the root dir.**/function Template($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($handle){if (!$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[$handle]);}// Run the compiled code.//echo ("<!-- ".$this->compiled_code[$handle]." -->");eval($this->compiled_code[$handle]);return true;}/*** fills $output template var*/function parse($handle){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[$handle], true, '_str');}// Run the compiled code.$_str = '';eval($this->compiled_code[$handle]);$this->output.= $_str;return true;}/*** prints $output template var*/function p(){echo $this->output;}/*** 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){reset ($vararray);while (list($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])and !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;}}?>