1<?php
2
3class CSSPropertyHandler {
4  var $_inheritable;
5  var $_inheritable_text;
6
7  function css($value, &$pipeline) {
8    $css_state =& $pipeline->get_current_css_state();
9
10    if ($this->applicable($css_state)) {
11      $this->replace($this->parse($value, $pipeline), $css_state);
12    };
13  }
14
15  function applicable($css_state) {
16    return true;
17  }
18
19  function clearDefaultFlags(&$state) {
20    $state->set_propertyDefaultFlag($this->get_property_code(), false);
21  }
22
23  function CSSPropertyHandler($inheritable, $inheritable_text) {
24    $this->_inheritable = $inheritable;
25    $this->_inheritable_text = $inheritable_text;
26  }
27
28  /**
29   * Optimization: this function is called very often, so
30   * we minimize the overhead by calling $this->get_property_code()
31   * once per property handler object instead of calling in every
32   * CSSPropertyHandler::get() call.
33   */
34  function &get(&$state) {
35    static $property_code = null;
36    if (is_null($property_code)) {
37      $property_code = $this->get_property_code();
38    };
39
40    if (!isset($state[$property_code])) {
41      $null = null;
42      return $null;
43    };
44
45    return $state[$property_code];
46  }
47
48  function inherit($old_state, &$new_state) {
49    $code = $this->get_property_code();
50    $new_state[$code] = ($this->_inheritable ?
51                         $old_state[$code] :
52                         $this->default_value());
53  }
54
55  function isInheritableText() {
56    return $this->_inheritable_text;
57  }
58
59  function isInheritable() {
60    return $this->_inheritable;
61  }
62
63  function inherit_text($old_state, &$new_state) {
64    $code = $this->get_property_code();
65
66    if ($this->_inheritable_text) {
67      $new_state[$code] = $old_state[$code];
68    } else {
69      $new_state[$code] = $this->default_value();
70    };
71  }
72
73  function is_default($value) {
74    if (is_object($value)) {
75      return $value->is_default();
76    } else {
77      return $this->default_value() === $value;
78    };
79  }
80
81  function is_subproperty() { return false; }
82
83  function replace($value, &$state) {
84    $state->set_property($this->get_property_code(), $value);
85  }
86
87  function replaceDefault($value, &$state) {
88    $state->set_propertyDefault($this->get_property_code(), $value);
89  }
90
91  function replace_array($value, &$state) {
92    static $property_code = null;
93    if (is_null($property_code)) {
94      $property_code = $this->get_property_code();
95    };
96
97    $state[$property_code] = $value;
98  }
99}
100
101?>