1: <?php
  2: /**
  3:  *
  4:  * When this plugin is enabled, a selector will be floated at the upper left corner
  5:  * of the browser window. This enables a visitor to select which theme he wants to use.
  6:  *
  7:  * Theme selection is stored in a cookie. The default duration of this cookie is 120 minutes,
  8:  * changeable by an option.
  9:  *
 10:  * No theme participation is needed for this plugin. But to accomplish this independence the
 11:  * plugin will load a small css block in the theme head. The actual styling is an option to the plugin.
 12:  * A theme may replace this css via the <var>themeSwitcher_css</var> filter.
 13:  *
 14:  * Themes and plugins may use the <var>themeSwitcher_head</var> and <var>themeSwitcher_controllink</var> filters to add (or remove)
 15:  * switcher controls. The <i><var>active()</var></i> method may be called to see if <i>themeSwitcher</i> will display
 16:  * the control links.
 17:  *
 18:  * @package plugins
 19:  * @subpackage development
 20:  */
 21: $plugin_is_filter = 500 | CLASS_PLUGIN;
 22: $plugin_description = gettext('Allow a visitor to select the theme of the gallery.');
 23: $plugin_author = "Stephen Billard (sbillard)";
 24: 
 25: $option_interface = 'themeSwitcher';
 26: 
 27: class themeSwitcher {
 28: 
 29:     function __construct() {
 30:         global $_zp_gallery;
 31:         $themes = $_zp_gallery->getThemes();
 32:         foreach ($themes as $key => $theme) {
 33:             setOptionDefault('themeSwitcher_theme_' . $key, 1);
 34:             $themelist[$key] = getOption('themeSwitcher_theme_' . $key);
 35:         }
 36:         setOptionDefault('themeSwitcher_timeout', 60 * 2);
 37:         setOptionDefault('themeSwitcher_css', ".themeSwitcherControlLink {\n" .
 38:                         " position: fixed;\n" .
 39:                         " z-index: 10000;\n" .
 40:                         " left: 0px;\n" .
 41:                         " top: 0px;\n" .
 42:                         " border-bottom: 1px solid #444;\n" .
 43:                         " border-left: 1px solid #444;\n" .
 44:                         " color: black;\n" .
 45:                         " padding: 2px;\n" .
 46:                         " background-color: #f5f5f5 !important;\n" .
 47:                         "}\n"
 48:         );
 49:         setOptionDefault('themeSwitcher_css_loggedin', ".themeSwitcherControlLink {\n" .
 50:                         " position: fixed;\n" .
 51:                         " z-index: 10000;\n" .
 52:                         " left: 0px;\n" .
 53:                         " top: 30px;\n" .
 54:                         " border-bottom: 1px solid #444;\n" .
 55:                         " border-left: 1px solid #444;\n" .
 56:                         " color: black;\n" .
 57:                         " padding: 2px;\n" .
 58:                         " background-color: #f5f5f5 !important;\n" .
 59:                         "}\n"
 60:         );
 61:         setOptionDefault('themeSwitcher_adminOnly', 1);
 62:     }
 63: 
 64:     function getOptionsSupported() {
 65:         global $_zp_gallery;
 66:         $themes = $_zp_gallery->getThemes();
 67:         $list = array();
 68:         foreach ($themes as $key => $theme) {
 69:             $list[$theme['name']] = 'themeSwitcher_theme_' . $key;
 70:         }
 71:         $options = array(gettext('Cookie duration') => array('key'   => 'themeSwitcher_timeout', 'type' => OPTION_TYPE_TEXTBOX,
 72:                                         'desc' => gettext('The time in minutes that the theme switcher cookie lasts.')),
 73:                         gettext('Selector CSS')      => array('key'                  => 'themeSwitcher_css', 'type'              => OPTION_TYPE_TEXTAREA,
 74:                                         'multilingual' => false,
 75:                                         'desc'               => gettext('Change this box if you wish to style the theme switcher selector for your themes.')),
 76:                         gettext('Selector CSS Loggedin')         => array('key'                  => 'themeSwitcher_css_loggedin', 'type'                 => OPTION_TYPE_TEXTAREA,
 77:                                         'multilingual' => false,
 78:                                         'desc'               => gettext('Change this box if you wish to style the theme switcher selector for your themes. Only if loggedin to cover the admin toolbox.')),
 79:                         gettext('Private')               => array('key'  => 'themeSwitcher_adminOnly', 'type' => OPTION_TYPE_CHECKBOX,
 80:                                         'desc' => gettext('Only users with <em>Themes</em> rights will see the selector if this is checked.')),
 81:                         gettext('Theme list')            => array('key'              => 'themeSwitcher_list', 'type'             => OPTION_TYPE_CHECKBOX_UL,
 82:                                         'checkboxes' => $list,
 83:                                         'desc'           => gettext('These are the themes that may be selected among.'))
 84:         );
 85:         return $options;
 86:     }
 87: 
 88:     function handleOption($option, $currentValue) {
 89: 
 90:     }
 91: 
 92:     /**
 93:      *
 94:      * Filter to "setupTheme" that will override the gallery theme with user selected theme
 95:      * @param string $theme
 96:      */
 97:     static function theme($theme) {
 98:         global $_zp_gallery;
 99:         $new = zp_getCookie('themeSwitcher_theme');
100:         if ($new) {
101:             if (array_key_exists($new, $_zp_gallery->getThemes())) {
102:                 $theme = $new;
103:             }
104:         }
105:         return $theme;
106:     }
107: 
108:     static function head($css) {
109:         global $_themeSwitcherThemelist;
110:         if (getOption('themeSwitcher_css')) {
111:             ?>
112:             <style type="text/css">
113:             <?php 
114:             if(zp_loggedin()) {
115:                 echo zp_apply_filter('themeSwitcher_css', getOption('themeSwitcher_css_loggedin')); 
116:             } else {
117:                 echo zp_apply_filter('themeSwitcher_css', getOption('themeSwitcher_css')); 
118:             }
119:             ?>
120:             </style>
121:             <?php
122:         }
123:         ?>
124:         <script type="text/javascript">
125:             // <!-- <![CDATA[
126:             function switchTheme(reloc) {
127:                 window.location = reloc.replace(/%t/, $('#themeSwitcher').val());
128:             }
129:             // ]]> -->
130:         </script>
131:         <?php
132:         $_themeSwitcherThemelist = zp_apply_filter('themeSwitcher_head', $_themeSwitcherThemelist);
133:         return $css;
134:     }
135: 
136:     /**
137:      *
138:      * places a selector so a user may change thems
139:      * @param string $text link text
140:      */
141:     static function controlLink($textIn = NULL) {
142:         global $_zp_gallery, $_themeSwitcherThemelist, $_zp_gallery_page;
143:         if (self::active()) {
144:             $themes = array();
145:             foreach ($_zp_gallery->getThemes() as $theme => $details) {
146:                 if ($_themeSwitcherThemelist[$theme]) {
147:                     if (getPlugin($_zp_gallery_page, $theme)) {
148:                         $themes[$details['name']] = $theme;
149:                     }
150:                 }
151:             }
152:             $text = $textIn;
153:             if (empty($text)) {
154:                 $text = gettext('Theme');
155:             }
156:             $reloc = pathurlencode(trim(preg_replace('~themeSwitcher=.*?&~', '', getRequestURI() . '&'), '?&'));
157:             if (strpos($reloc, '?')) {
158:                 $reloc .= '&themeSwitcher=%t';
159:             } else {
160:                 $reloc .= '?themeSwitcher=%t';
161:             }
162:             $theme = $_zp_gallery->getCurrentTheme();
163:             ?>
164:             <span class="themeSwitcherControlLink">
165:                 <span title="<?php echo gettext("Themes will not show in this list if selecting them would result in a “not error."); ?>">
166:                     <?php echo $text; ?>
167:                     <select name="themeSwitcher" id="themeSwitcher" onchange="switchTheme('<?php echo html_encode($reloc); ?>')">
168:                         <?php generateListFromArray(array($theme), $themes, false, true); ?>
169:                     </select>
170:                 </span>
171:                 <?php zp_apply_filter('themeSwitcher_Controllink', $theme); ?>
172:             </span>
173:             <?php
174:         }
175:         return $textIn;
176:     }
177: 
178:     static function active() {
179:         global $_showNotLoggedin_real_auth;
180:         if (is_object($_showNotLoggedin_real_auth)) {
181:             $loggedin = $_showNotLoggedin_real_auth->getRights();
182:         } else {
183:             $loggedin = zp_loggedin();
184:         }
185:         return !getOption('themeSwitcher_adminOnly') || $loggedin & (ADMIN_RIGHTS | THEMES_RIGHTS);
186:     }
187: 
188: }
189: 
190: $_themeSwitcherThemelist = array();
191: foreach ($_zp_gallery->getThemes() as $__key => $__theme) {
192:     $set = getOption('themeSwitcher_theme_' . $__key);
193:     if (is_null($set)) //newly arrived theme?
194:         $set = 1;
195:     $_themeSwitcherThemelist[$__key] = $set;
196: }
197: unset($__key);
198: unset($__theme);
199: if (isset($_GET['themeSwitcher'])) {
200:     zp_setCookie('themeSwitcher_theme', sanitize($_GET['themeSwitcher']), getOption('themeSwitcher_timeout') * 60);
201: }
202: 
203: if (zp_getCookie('themeSwitcher_theme')) {
204:     zp_register_filter('setupTheme', 'themeSwitcher::theme');
205: }
206: zp_register_filter('theme_head', 'themeSwitcher::head', 999);
207: zp_register_filter('theme_body_open', 'themeSwitcher::controlLink');
208: ?>