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   1  <?php
   2  /**
   3   * Smarty Internal Plugin Compile Assign
   4   *
   5   * Compiles the {assign} tag
   6   *
   7   * @package Smarty
   8   * @subpackage Compiler
   9   * @author Uwe Tews
  10   */
  11  
  12  /**
  13   * Smarty Internal Plugin Compile Assign Class
  14   *
  15   * @package Smarty
  16   * @subpackage Compiler
  17   */
  18  class Smarty_Internal_Compile_Assign extends Smarty_Internal_CompileBase {
  19  
  20      /**
  21       * Compiles code for the {assign} tag
  22       *
  23       * @param array  $args      array with attributes from parser
  24       * @param object $compiler  compiler object
  25       * @param array  $parameter array with compilation parameter
  26       * @return string compiled code
  27       */
  28      public function compile($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              $compiler->template->tpl_vars[trim($_attr['var'], "'")] = new Smarty_variable(null, true);
  43          }
  44          // scope setup
  45          if (isset($_attr['scope'])) {
  46              $_attr['scope'] = trim($_attr['scope'], "'\"");
  47              if ($_attr['scope'] == 'parent') {
  48                  $_scope = Smarty::SCOPE_PARENT;
  49              } elseif ($_attr['scope'] == 'root') {
  50                  $_scope = Smarty::SCOPE_ROOT;
  51              } elseif ($_attr['scope'] == 'global') {
  52                  $_scope = Smarty::SCOPE_GLOBAL;
  53              } else {
  54                  $compiler->trigger_template_error('illegal value for "scope" attribute', $compiler->lex->taglineno);
  55              }
  56          }
  57          // compiled output
  58          if (isset($parameter['smarty_internal_index'])) {
  59              $output = "<?php \$_smarty_tpl->createLocalArrayVariable($_attr[var], $_nocache, $_scope);\n\$_smarty_tpl->tpl_vars[$_attr[var]]->value$parameter[smarty_internal_index] = $_attr[value];";
  60          } else {
  61              $output = "<?php \$_smarty_tpl->tpl_vars[$_attr[var]] = new Smarty_variable($_attr[value], $_nocache, $_scope);";
  62          }
  63          if ($_scope == Smarty::SCOPE_PARENT) {
  64              $output .= "\nif (\$_smarty_tpl->parent != null) \$_smarty_tpl->parent->tpl_vars[$_attr[var]] = clone \$_smarty_tpl->tpl_vars[$_attr[var]];";
  65          } elseif ($_scope == Smarty::SCOPE_ROOT || $_scope == Smarty::SCOPE_GLOBAL) {
  66              $output .= "\n\$_ptr = \$_smarty_tpl->parent; while (\$_ptr != null) {\$_ptr->tpl_vars[$_attr[var]] = clone \$_smarty_tpl->tpl_vars[$_attr[var]]; \$_ptr = \$_ptr->parent; }";
  67          }
  68          if ( $_scope == Smarty::SCOPE_GLOBAL) {
  69              $output .= "\nSmarty::\$global_tpl_vars[$_attr[var]] = clone \$_smarty_tpl->tpl_vars[$_attr[var]];";
  70          }
  71          $output .= '?>';
  72          return $output;
  73      }
  74  
  75  }
  76  
  77  ?>