lib/api/smarty/sysplugins/smarty_internal_compile_assign.php

   1 <?php
   2 /**
   3  * Smarty Internal Plugin Compile Assign
   4  * Compiles the {assign} tag
   5  *
   6  * @package    Smarty
   7  * @subpackage Compiler
   8  * @author     Uwe Tews
   9  */
  10
  11 /**
  12  * Smarty Internal Plugin Compile Assign Class
  13  *
  14  * @package    Smarty
  15  * @subpackage Compiler
  16  */
  17 class Smarty_Internal_Compile_Assign extends Smarty_Internal_CompileBase
  18 {
  19     /**
  20      * Compiles code for the {assign} tag
  21      *
  22      * @param  array  $args      array with attributes from parser
  23      * @param  object $compiler  compiler object
  24      * @param  array  $parameter array with compilation parameter
  25      *
  26      * @return string compiled code
  27      */
  28     public function compile($args, $compiler, $parameter)
  29     {
  30         // the following must be assigned at runtime because it will be overwritten in Smarty_Internal_Compile_Append
  31         $this->required_attributes = array('var', 'value');
  32         $this->shorttag_order = array('var', 'value');
  33         $this->optional_attributes = array('scope');
  34         $_nocache = 'null';
  35         $_scope = Smarty::SCOPE_LOCAL;
  36         // check and get attributes
  37         $_attr = $this->getAttributes($compiler, $args);
  38         // nocache ?
  39         if ($compiler->tag_nocache || $compiler->nocache) {
  40             $_nocache = 'true';
  41             // create nocache var to make it know for further compiling
  42             if (isset($compiler->template->tpl_vars[trim($_attr['var'], "'")])) {
  43                 $compiler->template->tpl_vars[trim($_attr['var'], "'")]->nocache = true;
  44             } else {
  45                 $compiler->template->tpl_vars[trim($_attr['var'], "'")] = new Smarty_Variable(null, true);
  46             }
  47         }
  48         // scope setup
  49         if (isset($_attr['scope'])) {
  50             $_attr['scope'] = trim($_attr['scope'], "'\"");
  51             if ($_attr['scope'] == 'parent') {
  52                 $_scope = Smarty::SCOPE_PARENT;
  53             } elseif ($_attr['scope'] == 'root') {
  54                 $_scope = Smarty::SCOPE_ROOT;
  55             } elseif ($_attr['scope'] == 'global') {
  56                 $_scope = Smarty::SCOPE_GLOBAL;
  57             } else {
  58                 $compiler->trigger_template_error('illegal value for "scope" attribute', $compiler->lex->taglineno);
  59             }
  60         }
  61         // compiled output
  62         if (isset($parameter['smarty_internal_index'])) {
  63             $output = "<?php \$_smarty_tpl->createLocalArrayVariable($_attr[var], $_nocache, $_scope);\n\$_smarty_tpl->tpl_vars[$_attr[var]]->value$parameter[smarty_internal_index] = $_attr[value];";
  64         } else {
  65             // implement Smarty2's behaviour of variables assigned by reference
  66             if ($compiler->template->smarty instanceof SmartyBC) {
  67                 $output = "<?php if (isset(\$_smarty_tpl->tpl_vars[$_attr[var]])) {\$_smarty_tpl->tpl_vars[$_attr[var]] = clone \$_smarty_tpl->tpl_vars[$_attr[var]];";
  68                 $output .= "\n\$_smarty_tpl->tpl_vars[$_attr[var]]->value = $_attr[value]; \$_smarty_tpl->tpl_vars[$_attr[var]]->nocache = $_nocache; \$_smarty_tpl->tpl_vars[$_attr[var]]->scope = $_scope;";
  69                 $output .= "\n} else \$_smarty_tpl->tpl_vars[$_attr[var]] = new Smarty_Variable($_attr[value], $_nocache, $_scope);";
  70             } else {
  71                 $output = "<?php \$_smarty_tpl->tpl_vars[$_attr[var]] = new Smarty_Variable($_attr[value], $_nocache, $_scope);";
  72             }
  73         }
  74         if ($_scope == Smarty::SCOPE_PARENT) {
  75             $output .= "\nif (\$_smarty_tpl->parent != null) \$_smarty_tpl->parent->tpl_vars[$_attr[var]] = clone \$_smarty_tpl->tpl_vars[$_attr[var]];";
  76         } elseif ($_scope == Smarty::SCOPE_ROOT || $_scope == Smarty::SCOPE_GLOBAL) {
  77             $output .= "\n\$_ptr = \$_smarty_tpl->parent; while (\$_ptr != null) {\$_ptr->tpl_vars[$_attr[var]] = clone \$_smarty_tpl->tpl_vars[$_attr[var]]; \$_ptr = \$_ptr->parent; }";
  78         }
  79         if ($_scope == Smarty::SCOPE_GLOBAL) {
  80             $output .= "\nSmarty::\$global_tpl_vars[$_attr[var]] = clone \$_smarty_tpl->tpl_vars[$_attr[var]];";
  81         }
  82         $output .= '?>';
  83
  84         return $output;
  85     }
  86 }