1 | <?php |
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2 | /** |
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3 | * CSS.inc.css |
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4 | * code by strangecode :: www.strangecode.com :: this document contains copyrighted information |
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5 | * |
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6 | * Dynamically outputs cached CSS data. |
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7 | * |
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8 | * @author Quinn Comendant <quinn@strangecode.com> |
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9 | * @version 1.0 |
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10 | */ |
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11 | class CSS { |
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12 | |
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13 | // Include these style sheets. |
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14 | var $_css_files = array(); |
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15 | |
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16 | // Cache style sheets? |
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17 | var $_params = array( |
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18 | 'cache_css' => true, |
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19 | 'character_set' => 'ISO-8859-1', |
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20 | ); |
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21 | |
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22 | /** |
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23 | * Constructor. |
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24 | */ |
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25 | function CSS() |
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26 | { |
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27 | $this->_params['character_set'] = isset($CFG->character_set) ? $CFG->character_set : $this->_params['character_set']; |
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28 | } |
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29 | |
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30 | /** |
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31 | * Set (or overwrite existing) parameters by passing an array of new parameters. |
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32 | * |
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33 | * @access public |
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34 | * |
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35 | * @param array $params Array of parameters (key => val pairs). |
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36 | */ |
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37 | function setParam($params=null) |
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38 | { |
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39 | if (isset($params) && is_array($params)) { |
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40 | // Merge new parameters with old overriding only those passed. |
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41 | $this->_params = array_merge($this->_params, $params); |
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42 | } else { |
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43 | logMsg(sprintf('Supplied argument is not an array: %s', $params), LOG_WARNING, __FILE__, __LINE__); |
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44 | } |
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45 | } |
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46 | |
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47 | /** |
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48 | * Return the value of a parameter. |
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49 | * |
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50 | * @access public |
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51 | * |
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52 | * @param string $param The key of the parameter to return. |
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53 | * |
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54 | * @return mixed Parameter value. |
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55 | */ |
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56 | function getParam($param) |
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57 | { |
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58 | return $this->_params[$param]; |
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59 | } |
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60 | |
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61 | /** |
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62 | * Add a file-path to the array of files to include as CSS. |
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63 | * |
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64 | * @access public |
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65 | * |
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66 | * @param string Full path to css file. |
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67 | * |
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68 | * @return bool True on success, false on failure. |
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69 | */ |
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70 | function setFile($file) |
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71 | { |
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72 | if (file_exists($file)) { |
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73 | $this->_css_files[] = $file; |
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74 | return true; |
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75 | } else { |
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76 | logMsg(sprintf('CSS file non-existant: %s', $file), LOG_WARNING, __FILE__, __LINE__); |
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77 | return false; |
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78 | } |
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79 | } |
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80 | |
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81 | /** |
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82 | * Output headers for CSS. |
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83 | * |
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84 | * @access public |
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85 | * |
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86 | * @return bool False if no files have been set. |
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87 | */ |
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88 | function headers() |
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89 | { |
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90 | if (empty($this->_css_files)) { |
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91 | logMsg(sprintf('CSS::headers called without specifiying any files.', null), LOG_NOTICE, __FILE__, __LINE__); |
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92 | return false; |
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93 | } |
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94 | |
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95 | // Get time of latest modified file. |
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96 | $files_mtime = array_map('filemtime', array_merge($this->_css_files, array(__FILE__))); |
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97 | sort($files_mtime, SORT_NUMERIC); |
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98 | $mtime = array_pop($files_mtime); |
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99 | |
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100 | if ($this->_params['cache_css']) { |
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101 | header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $mtime) . ' GMT'); |
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102 | header('Cache-Control: public, max-age=86400'); |
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103 | } else { |
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104 | header('Expires: -1'); |
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105 | header('Pragma: no-cache'); |
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106 | header('Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0'); |
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107 | } |
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108 | header('Content-Type: text/css; charset=' . $this->_params['character_set']); |
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109 | } |
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110 | |
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111 | /** |
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112 | * Include CSS files specified by setFile(). |
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113 | * |
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114 | * @access public |
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115 | * |
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116 | * @return bool False if no files have been set. |
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117 | */ |
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118 | function output() |
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119 | { |
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120 | if (empty($this->_css_files)) { |
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121 | logMsg(sprintf('CSS::output called without specifiying any files.', null), LOG_NOTICE, __FILE__, __LINE__); |
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122 | return false; |
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123 | } |
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124 | |
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125 | foreach ($this->_css_files as $file) { |
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126 | include $file; |
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127 | } |
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128 | } |
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129 | } |
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130 | ?> |
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