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: }
87: