1 | <?php |
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2 | |
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3 | /** |
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4 | * @file |
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5 | * Multiple language handling functionality. |
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6 | */ |
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7 | |
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8 | /** |
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9 | * Choose a language for the page, based on language negotiation settings. |
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10 | */ |
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11 | function language_initialize() { |
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12 | global $user; |
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13 | |
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14 | // Configured presentation language mode. |
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15 | $mode = variable_get('language_negotiation', LANGUAGE_NEGOTIATION_NONE); |
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16 | // Get a list of enabled languages. |
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17 | $languages = language_list('enabled'); |
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18 | $languages = $languages[1]; |
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19 | |
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20 | switch ($mode) { |
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21 | case LANGUAGE_NEGOTIATION_NONE: |
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22 | return language_default(); |
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23 | |
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24 | case LANGUAGE_NEGOTIATION_DOMAIN: |
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25 | foreach ($languages as $language) { |
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26 | $parts = parse_url($language->domain); |
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27 | if (!empty($parts['host']) && ($_SERVER['HTTP_HOST'] == $parts['host'])) { |
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28 | return $language; |
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29 | } |
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30 | } |
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31 | return language_default(); |
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32 | |
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33 | case LANGUAGE_NEGOTIATION_PATH_DEFAULT: |
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34 | case LANGUAGE_NEGOTIATION_PATH: |
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35 | // $_GET['q'] might not be available at this time, because |
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36 | // path initialization runs after the language bootstrap phase. |
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37 | $args = isset($_GET['q']) ? explode('/', $_GET['q']) : array(); |
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38 | $prefix = array_shift($args); |
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39 | // Search prefix within enabled languages. |
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40 | foreach ($languages as $language) { |
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41 | if (!empty($language->prefix) && $language->prefix == $prefix) { |
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42 | // Rebuild $GET['q'] with the language removed. |
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43 | $_GET['q'] = implode('/', $args); |
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44 | return $language; |
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45 | } |
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46 | } |
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47 | if ($mode == LANGUAGE_NEGOTIATION_PATH_DEFAULT) { |
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48 | // If we did not found the language by prefix, choose the default. |
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49 | return language_default(); |
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50 | } |
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51 | break; |
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52 | } |
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53 | |
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54 | // User language. |
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55 | if ($user->uid && isset($languages[$user->language])) { |
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56 | return $languages[$user->language]; |
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57 | } |
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58 | |
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59 | // Browser accept-language parsing. |
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60 | if ($language = language_from_browser()) { |
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61 | return $language; |
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62 | } |
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63 | |
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64 | // Fall back on the default if everything else fails. |
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65 | return language_default(); |
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66 | } |
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67 | |
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68 | /** |
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69 | * Identify language from the Accept-language HTTP header we got. |
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70 | */ |
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71 | function language_from_browser() { |
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72 | // Specified by the user via the browser's Accept Language setting |
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73 | // Samples: "hu, en-us;q=0.66, en;q=0.33", "hu,en-us;q=0.5" |
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74 | $browser_langs = array(); |
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75 | |
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76 | if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) { |
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77 | $browser_accept = explode(",", $_SERVER['HTTP_ACCEPT_LANGUAGE']); |
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78 | for ($i = 0; $i < count($browser_accept); $i++) { |
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79 | // The language part is either a code or a code with a quality. |
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80 | // We cannot do anything with a * code, so it is skipped. |
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81 | // If the quality is missing, it is assumed to be 1 according to the RFC. |
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82 | if (preg_match("!([a-z-]+)(;q=([0-9\\.]+))?!", trim($browser_accept[$i]), $found)) { |
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83 | $browser_langs[$found[1]] = (isset($found[3]) ? (float) $found[3] : 1.0); |
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84 | } |
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85 | } |
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86 | } |
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87 | |
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88 | // Order the codes by quality |
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89 | arsort($browser_langs); |
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90 | |
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91 | // Try to find the first preferred language we have |
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92 | $languages = language_list('enabled'); |
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93 | foreach ($browser_langs as $langcode => $q) { |
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94 | if (isset($languages['1'][$langcode])) { |
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95 | return $languages['1'][$langcode]; |
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96 | } |
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97 | } |
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98 | } |
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99 | |
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100 | /** |
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101 | * Rewrite URL's with language based prefix. Parameters are the same |
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102 | * as those of the url() function. |
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103 | */ |
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104 | function language_url_rewrite(&$path, &$options) { |
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105 | global $language; |
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106 | |
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107 | // Only modify relative (insite) URLs. |
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108 | if (empty($options['external'])) { |
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109 | |
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110 | // Language can be passed as an option, or we go for current language. |
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111 | if (!isset($options['language'])) { |
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112 | $options['language'] = $language; |
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113 | } |
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114 | |
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115 | switch (variable_get('language_negotiation', LANGUAGE_NEGOTIATION_NONE)) { |
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116 | case LANGUAGE_NEGOTIATION_NONE: |
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117 | // No language dependent path allowed in this mode. |
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118 | unset($options['language']); |
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119 | break; |
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120 | |
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121 | case LANGUAGE_NEGOTIATION_DOMAIN: |
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122 | if ($options['language']->domain) { |
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123 | // Ask for an absolute URL with our modified base_url. |
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124 | $options['absolute'] = TRUE; |
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125 | $options['base_url'] = $options['language']->domain; |
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126 | } |
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127 | break; |
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128 | |
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129 | case LANGUAGE_NEGOTIATION_PATH_DEFAULT: |
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130 | $default = language_default(); |
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131 | if ($options['language']->language == $default->language) { |
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132 | break; |
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133 | } |
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134 | // Intentionally no break here. |
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135 | |
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136 | case LANGUAGE_NEGOTIATION_PATH: |
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137 | if (!empty($options['language']->prefix)) { |
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138 | $options['prefix'] = $options['language']->prefix .'/'; |
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139 | } |
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140 | break; |
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141 | } |
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142 | } |
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143 | } |
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