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 1.1 |
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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' => 'utf-8', |
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20 | ); |
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21 | |
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22 | /** |
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23 | * Set (or overwrite existing) parameters by passing an array of new parameters. |
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24 | * |
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25 | * @access public |
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26 | * @param array $params Array of parameters (key => val pairs). |
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27 | */ |
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28 | function setParam($params) |
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29 | { |
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30 | if (isset($params) && is_array($params)) { |
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31 | // Merge new parameters with old overriding only those passed. |
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32 | $this->_params = array_merge($this->_params, $params); |
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33 | } else { |
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34 | App::logMsg(sprintf('Parameters are not an array: %s', $params), LOG_ERR, __FILE__, __LINE__); |
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35 | } |
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36 | } |
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37 | |
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38 | /** |
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39 | * Return the value of a parameter, if it exists. |
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40 | * |
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41 | * @access public |
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42 | * @param string $param Which parameter to return. |
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43 | * @return mixed Configured parameter value. |
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44 | */ |
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45 | function getParam($param) |
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46 | { |
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47 | if (isset($this->_params[$param])) { |
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48 | return $this->_params[$param]; |
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49 | } else { |
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50 | App::logMsg(sprintf('Parameter is not set: %s', $param), LOG_DEBUG, __FILE__, __LINE__); |
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51 | return null; |
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52 | } |
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53 | } |
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54 | |
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55 | /** |
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56 | * Add a file-path to the array of files to include as CSS. |
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57 | * |
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58 | * @access public |
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59 | * |
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60 | * @param string Full path to css file. |
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61 | * |
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62 | * @return bool True on success, false on failure. |
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63 | */ |
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64 | function setFile($file) |
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65 | { |
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66 | if (file_exists($file)) { |
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67 | $this->_css_files[] = $file; |
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68 | return true; |
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69 | } else { |
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70 | App::logMsg(sprintf('CSS file non-existent: %s', $file), LOG_ERR, __FILE__, __LINE__); |
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71 | return false; |
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72 | } |
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73 | } |
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74 | |
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75 | /** |
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76 | * Output headers for CSS. |
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77 | * |
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78 | * @access public |
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79 | * |
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80 | * @return bool False if no files have been set. |
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81 | */ |
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82 | function headers() |
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83 | { |
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84 | if (empty($this->_css_files)) { |
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85 | App::logMsg(sprintf('CSS::headers called without specifying any files.', null), LOG_WARNING, __FILE__, __LINE__); |
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86 | return false; |
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87 | } |
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88 | |
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89 | // Get time of latest modified file, including this class file. |
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90 | $files_mtime = array_map('filemtime', array_merge($this->_css_files, array(__FILE__))); |
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91 | sort($files_mtime, SORT_NUMERIC); |
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92 | $mtime = array_pop($files_mtime); |
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93 | |
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94 | if ($this->_params['cache_css']) { |
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95 | header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $mtime) . ' GMT'); |
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96 | header('Cache-Control: public, max-age=86400'); |
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97 | } else { |
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98 | header('Expires: -1'); |
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99 | header('Pragma: no-cache'); |
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100 | header('Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0'); |
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101 | } |
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102 | header('Content-Type: text/css; charset=' . $this->_params['character_set']); |
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103 | } |
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104 | |
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105 | /** |
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106 | * Include CSS files specified by setFile(). |
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107 | * |
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108 | * @access public |
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109 | * |
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110 | * @return bool False if no files have been set. |
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111 | */ |
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112 | function output() |
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113 | { |
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114 | if (empty($this->_css_files)) { |
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115 | App::logMsg(sprintf('CSS::output called without specifying any files.', null), LOG_WARNING, __FILE__, __LINE__); |
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116 | return false; |
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117 | } |
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118 | |
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119 | foreach ($this->_css_files as $file) { |
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120 | include $file; |
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121 | } |
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122 | } |
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123 | } |
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124 | ?> |
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