1: <?php
  2: /**
  3:  * Copyright 2008-2014 Horde LLC (http://www.horde.org/)
  4:  *
  5:  * See the enclosed file COPYING for license information (GPL). If you
  6:  * did not receive this file, see http://www.horde.org/licenses/gpl.
  7:  *
  8:  * @category  Horde
  9:  * @copyright 2008-2014 Horde LLC
 10:  * @license   http://www.horde.org/licenses/gpl GPL
 11:  * @package   IMP
 12:  */
 13: 
 14: /**
 15:  * Handler to generate thumbnails for PDF attachments.
 16:  *
 17:  * @author    Michael Slusarz <slusarz@horde.org>
 18:  * @category  Horde
 19:  * @copyright 2008-2014 Horde LLC
 20:  * @license   http://www.horde.org/licenses/gpl GPL
 21:  * @package   IMP
 22:  */
 23: class IMP_Mime_Viewer_Pdf extends Horde_Mime_Viewer_Pdf
 24: {
 25:     /**
 26:      * This driver's display capabilities.
 27:      *
 28:      * @var array
 29:      */
 30:     protected $_capability = array(
 31:         'full' => true,
 32:         'info' => true,
 33:         'inline' => false,
 34:         'raw' => false
 35:     );
 36: 
 37:     /**
 38:      * Return the full rendered version of the Horde_Mime_Part object.
 39:      *
 40:      * URL parameters used by this function:
 41:      *   - pdf_view_thumbnail: (boolean) Output the thumbnail info.
 42:      *
 43:      * @return array  See parent::render().
 44:      */
 45:     protected function _render()
 46:     {
 47:         /* Create the thumbnail and display. */
 48:         if (!$GLOBALS['injector']->getInstance('Horde_Variables')->pdf_view_thumbnail) {
 49:             return parent::_render();
 50:         }
 51: 
 52:         $img = $this->_getHordeImageOb(true);
 53: 
 54:         if ($img) {
 55:             $img->resize(150, 150, true);
 56:             $type = $img->getContentType();
 57:             $data = $img->raw(true);
 58:         }
 59: 
 60:         if (!$img || !$data) {
 61:             $type = 'image/png';
 62:             $img_ob = Horde_Themes::img('mini-error.png', 'imp');
 63:             $data = file_get_contents($img_ob->fs);
 64:         }
 65: 
 66:         return array(
 67:             $this->_mimepart->getMimeId() => array(
 68:                 'data' => $data,
 69:                 'type' => $type
 70:             )
 71:         );
 72:     }
 73: 
 74:     /**
 75:      * Return the rendered information about the Horde_Mime_Part object.
 76:      *
 77:      * @return array  See parent::render().
 78:      */
 79:     protected function _renderInfo()
 80:     {
 81:         /* Check to see if convert utility is available. */
 82:         if (!$this->_getHordeImageOb(false)) {
 83:             return array();
 84:         }
 85: 
 86:         $status = new IMP_Mime_Status(_("This is a thumbnail of a PDF file attachment."));
 87:         $status->icon('mime/image.png');
 88: 
 89:         switch ($GLOBALS['registry']->getView()) {
 90:         case Horde_Registry::VIEW_MINIMAL:
 91:             $status->addText(Horde::link($this->getConfigParam('imp_contents')->urlView($this->_mimepart, 'view_attach')) . $this->_outputImgTag() . '</a>');
 92:             break;
 93: 
 94:         default:
 95:             $status->addText($this->getConfigParam('imp_contents')->linkViewJS($this->_mimepart, 'view_attach', $this->_outputImgTag(), null, null, null));
 96:             break;
 97:         }
 98: 
 99:         return array(
100:             $this->_mimepart->getMimeId() => array(
101:                 'data' => '',
102:                 'status' => $status,
103:                 'type' => 'text/html; charset=' . $this->getConfigParam('charset')
104:             )
105:         );
106:     }
107: 
108:     /**
109:      * Return a Horde_Image object.
110:      *
111:      * @param boolean $load  Whether to load the image data.
112:      *
113:      * @return mixed  The Hore_Image object, or false on error.
114:      */
115:     protected function _getHordeImageOb($load)
116:     {
117:         if (!$this->getConfigParam('thumbnails')) {
118:             return false;
119:         }
120: 
121:         try {
122:             $img = $GLOBALS['injector']->getInstance('Horde_Core_Factory_Image')->create();
123:         } catch (Horde_Exception $e) {
124:             return false;
125:         }
126:         if (!$img->hasCapability('multipage') && !$img->hasCapability('pdf')) {
127:             return false;
128:         }
129: 
130:         if ($load) {
131:             try {
132:                 $img->loadString($this->_mimepart->getContents());
133:             } catch (Horde_Image_Exception $e) {
134:                 return false;
135:             }
136:         }
137: 
138:         try {
139:             if ($img instanceof Horde_Image_Imagick) {
140:                 /* Get rid of PDF transparency. */
141:                 $img->imagick->setImageBackgroundColor('white');
142:                 return $GLOBALS['injector']->getInstance('Horde_Core_Factory_Image')->create(array(
143:                     'data' => $img->imagick->flattenImages()->getImageBlob()
144:                 ));
145:             }
146: 
147:             return $img->getImageAtIndex(0);
148:         } catch (Horde_Image_Exception $e) {
149:             return false;
150:         }
151:     }
152: 
153:     /**
154:      * Output an image tag for the thumbnail.
155:      *
156:      * @return string  An image tag.
157:      */
158:     protected function _outputImgTag()
159:     {
160:         return '<img src="' . $this->getConfigParam('imp_contents')->urlView($this->_mimepart, 'view_attach', array('params' => array('pdf_view_thumbnail' => 1)))->setRaw(false) . '" alt="' . htmlspecialchars(_("View PDF File"), ENT_COMPAT, $this->getConfigParam('charset')) . '" />';
161:     }
162: 
163: }
164: