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<?php
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class CSSPropertyHandler {
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var $_inheritable;
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var $_inheritable_text;
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function css($value, &$pipeline) {
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$css_state =& $pipeline->get_current_css_state();
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if ($this->applicable($css_state)) {
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$this->replace($this->parse($value, $pipeline), $css_state);
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};
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}
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function applicable($css_state) {
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return true;
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}
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function clearDefaultFlags(&$state) {
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$state->set_propertyDefaultFlag($this->get_property_code(), false);
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}
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function CSSPropertyHandler($inheritable, $inheritable_text) {
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$this->_inheritable = $inheritable;
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$this->_inheritable_text = $inheritable_text;
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}
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/**
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* Optimization: this function is called very often, so
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* we minimize the overhead by calling $this->get_property_code()
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* once per property handler object instead of calling in every
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* CSSPropertyHandler::get() call.
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*/
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function &get(&$state) {
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static $property_code = null;
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if (is_null($property_code)) {
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$property_code = $this->get_property_code();
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};
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if (!isset($state[$property_code])) {
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$null = null;
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return $null;
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};
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return $state[$property_code];
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}
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function inherit($old_state, &$new_state) {
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$code = $this->get_property_code();
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$new_state[$code] = ($this->_inheritable ?
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$old_state[$code] :
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$this->default_value());
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}
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function isInheritableText() {
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return $this->_inheritable_text;
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}
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function isInheritable() {
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return $this->_inheritable;
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}
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function inherit_text($old_state, &$new_state) {
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$code = $this->get_property_code();
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if ($this->_inheritable_text) {
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$new_state[$code] = $old_state[$code];
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} else {
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$new_state[$code] = $this->default_value();
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};
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}
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function is_default($value) {
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if (is_object($value)) {
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return $value->is_default();
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} else {
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return $this->default_value() === $value;
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};
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}
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function is_subproperty() { return false; }
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function replace($value, &$state) {
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$state->set_property($this->get_property_code(), $value);
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}
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function replaceDefault($value, &$state) {
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$state->set_propertyDefault($this->get_property_code(), $value);
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}
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function replace_array($value, &$state) {
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static $property_code = null;
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if (is_null($property_code)) {
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$property_code = $this->get_property_code();
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};
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$state[$property_code] = $value;
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}
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}
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?>
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