88 lines
2.2 KiB
PHP
88 lines
2.2 KiB
PHP
<?php
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/**
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* @package HTML2PS
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* @subpackage Document
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* Represents the 'background-postitions' CSS property value
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*
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* @link http://www.w3.org/TR/CSS21/colors.html#propdef-background-position CSS 2.1 'background-position' property description
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*/
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class BackgroundPosition {
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/**
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* @var string X-offset value
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* @access public
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*/
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var $x;
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/**
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* @var string Y-offset value
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* @access public
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*/
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var $y;
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/**
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* @var boolean Indicates whether $x value contains absolute (false) or percentage (true) value
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* @access public
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*/
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var $x_percentage;
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/**
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* @var boolean Indicates whether $y value contains absolute (false) or percentage (true) value
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* @access public
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*/
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var $y_percentage;
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/**
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* Constructs new 'background-position' value object
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*
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* @param float $x X-offset value
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* @param boolean $x_percentage A flag indicating that $x value should be treated as percentage
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* @param float $y Y-offset value
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* @param boolean $y_percentage A flag indicating that $y value should be treated as percentage
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*/
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function BackgroundPosition($x, $x_percentage, $y, $y_percentage) {
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$this->x = $x;
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$this->x_percentage = $x_percentage;
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$this->y = $y;
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$this->y_percentage = $y_percentage;
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}
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/**
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* A "deep copy" routine; it is required for compatibility with PHP 5
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*
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* @return BackgroundPosition A copy of current object
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*/
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function ©() {
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$value =& new BackgroundPosition($this->x, $this->x_percentage,
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$this->y, $this->y_percentage);
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return $value;
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}
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/**
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* Test is current value is equal to default 'background-position' CSS property value
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*/
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function is_default() {
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return
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$this->x == 0 &&
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$this->x_percentage &&
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$this->y == 0 &&
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$this->y_percentage;
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}
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/**
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* Converts the absolute lengths to the device points
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*
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* @param float $font_size Font size to use during conversion of 'ex' and 'em' units
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*/
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function units2pt($font_size) {
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if (!$this->x_percentage) {
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$this->x = units2pt($this->x, $font_size);
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};
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if (!$this->y_percentage) {
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$this->y = units2pt($this->y, $font_size);
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};
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}
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}
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?>
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