Subversion-Projekte lars-tiefland.php_share

Revision

Details | Letzte Änderung | Log anzeigen | RSS feed

Revision Autor Zeilennr. Zeile
1 lars 1 
<?php
2 
 
3 
/**
4 
 * @package HTML2PS
5 
 * @subpackage Document
6 
 * Represents the 'background-postitions' CSS property value
7 
 *
8 
 * @link http://www.w3.org/TR/CSS21/colors.html#propdef-background-position CSS 2.1 'background-position' property description
9 
 */
10 
class BackgroundPosition {
11 
  /**
12 
   * @var string X-offset value
13 
   * @access public
14 
   */
15 
  var $x;
16 
 
17 
  /**
18 
   * @var string Y-offset value
19 
   * @access public
20 
   */
21 
  var $y;
22 
 
23 
  /**
24 
   * @var boolean Indicates whether $x value contains absolute (false) or percentage (true) value
25 
   * @access public
26 
   */
27 
  var $x_percentage;
28 
 
29 
  /**
30 
   * @var boolean Indicates whether $y value contains absolute (false) or percentage (true) value
31 
   * @access public
32 
   */
33 
  var $y_percentage;
34 
 
35 
  /**
36 
   * Constructs new 'background-position' value object
37 
   *
38 
   * @param float $x X-offset value
39 
   * @param boolean $x_percentage A flag indicating that $x value should be treated as percentage
40 
   * @param float $y Y-offset value
41 
   * @param boolean $y_percentage A flag indicating that $y value should be treated as percentage
42 
   */
43 
  function BackgroundPosition($x, $x_percentage, $y, $y_percentage) {
44 
    $this->x = $x;
45 
    $this->x_percentage = $x_percentage;
46 
    $this->y = $y;
47 
    $this->y_percentage = $y_percentage;
48 
  }
49 
 
50 
  /**
51 
   * A "deep copy" routine; it is required for compatibility with PHP 5
52 
   *
53 
   * @return BackgroundPosition A copy of current object
54 
   */
55 
  function &copy() {
56 
    $value =& new BackgroundPosition($this->x, $this->x_percentage,
57 
                                     $this->y, $this->y_percentage);
58 
    return $value;
59 
  }
60 
 
61 
  /**
62 
   * Test is current value is equal to default 'background-position' CSS property value
63 
   */
64 
  function is_default() {
65 
    return
66 
      $this->x == 0 &&
67 
      $this->x_percentage &&
68 
      $this->y == 0 &&
69 
      $this->y_percentage;
70 
  }
71 
 
72 
  /**
73 
   * Converts the absolute lengths to the device points
74 
   *
75 
   * @param float $font_size Font size to use during conversion of 'ex' and 'em' units
76 
   */
77 
  function units2pt($font_size) {
78 
    if (!$this->x_percentage) {
79 
      $this->x = units2pt($this->x, $font_size);
80 
    };
81 
 
82 
    if (!$this->y_percentage) {
83 
      $this->y = units2pt($this->y, $font_size);
84 
    };
85 
  }
86 
}
87 
 
88 
?>