Club Drupal

<?php

/**

 * @file

 * pdf reader module file.

 */

/**

 * Implements hook_permission().

 */

function pdf_reader_permission() {

  return array(

    'administer pdf reader' => array(

      'title' => t('Administer PDF Reader'),

      'description' => t('Perform maintenance tasks for PDF Reader'),

    ),

  );

}

/**

 * Implement hook_field_formatter_info().

 */

function pdf_reader_field_formatter_info() {

  return array(

    'pdf_reader_file' => array(

      'label' => t('PDF Reader'),

      'field types' => array('file', 'text'),

      'settings' => array(

        'pdf_width' => 600,

        'pdf_height' => 780,

        'renderer' => 'google',

        'download' => FALSE,

        'colorbox' => FALSE,

        'colorbox_link_text' => '',

      )

    ),

  );

}

/**

 * Implements hook_field_formatter_settings_form().

 */

function pdf_reader_field_formatter_settings_form($field, $instance, $view_mode, $form, &$form_state) {

  $display = $instance['display'][$view_mode];

  $settings = $display['settings'];

  $element['pdf_width'] = array(

    '#title' => t('Width'),

    '#type' => 'textfield',

    '#default_value' => $settings['pdf_width'],

  );

  $element['pdf_height'] = array(

    '#title' => t('Height'),

    '#type' => 'textfield',

    '#default_value' => $settings['pdf_height'],

  );

  $element['renderer'] = array(

    '#title' => t('Renderer'),

    '#type' => 'select',

    '#options' => array(

      'google' => 'Google Viewer',

      'direct' => 'Direct Embed',

      'pdf-js' => 'pdf.js'),

    '#default_value' => $settings['renderer'],

  );

  $element['download'] = array(

    '#title' => t('Show download link'),

    '#type' => 'checkbox',

    '#default_value' => $settings['download'],

  );

  if (module_exists('colorbox')) {

    variable_set('colorbox_inline', 1);

  }

  $element['colorbox'] = array(

    '#title' => t('Display in colorbox (colorbox module must be installed).'),

    '#type' => 'checkbox',

    '#disabled' => !module_exists('colorbox'),

    '#default_value' => $settings['colorbox'],

  );

  $element['colorbox_link_text'] = array(

    '#title' => t('Colorbox link'),

    '#type' => 'textfield',

    '#disabled' => !module_exists('colorbox'),

    '#default_value' => $settings['colorbox_link_text'],

  );

  return $element;

}

/**

 * Implements hook_field_formatter_settings_summary().

 */

function pdf_reader_field_formatter_settings_summary($field, $instance, $view_mode) {

  $renderers = array(

    'google' => 'Google Viewer',

    'direct' => 'Direct Embed',

    'pdf-js' => 'pdf.js');

  $display = $instance['display'][$view_mode];

  $settings = $display['settings'];

  $summary = 'Size: ' . $settings['pdf_width'] . 'x' . $settings['pdf_height']

      . ' Using: ' . $renderers[$settings['renderer']]

      . '<br> Download Link: ' . ($settings['download'] == 1 ? 'YES' : 'NO')

      . ' Use colorbox: ' . ($settings['colorbox'] == 1 ? 'YES' : 'NO')

      . ' Colorbox link text: ' . $settings['colorbox_link_text'];

  return $summary;

}

/**

 * Implements hook_field_formatter_view().

 */

function pdf_reader_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {

  $settings = $display['settings'];

  $element = array();

  switch ($display['type']) {

    case 'pdf_reader_file':

      foreach ($items as $delta => $item) {

        $element[$delta]['#type'] = 'markup';

        $element[$delta]['#markup'] = theme('pdf_reader', array('file' => $item, 'settings' => $settings));

      }

      break;

  }

  return $element;

}

/**

 * Implements hook_theme().

 *

 * Use our theme function.

 */

function pdf_reader_theme($existing, $type, $theme, $path) {

  return array(

    'pdf_reader' => array(

      'variables' => array('file' => NULL, 'settings' => NULL)

    ),

    'pdf_js' => array(

      'template' => 'pdf_js',

      'path' => drupal_get_path('module', 'pdf_reader') . '/theme'

    )

  );

}

/**

 * Theme the field with pdf reader

 */

function theme_pdf_reader($variables) {

  $file_url = isset($variables['file']['uri']) ? file_create_url($variables['file']['uri']) : $variables['file']['value'];

  switch ($variables['settings']['renderer']) {

    case 'google':

      $output = '<iframe id="pdf_reader" src="//docs.google.com/viewer?embedded=true&url='

          . urlencode($file_url)

          . '" width="' . $variables['settings']['pdf_width']

          . '" height="' . $variables['settings']['pdf_height']

          . '" scrolling="no'

          . '" style="border: none;"></iframe>';

      break;

    case 'direct':

      $output = '<object id="pdf_reader" data="' . $file_url . '#view=Fit' . '" '

          . 'type="application/pdf' . '" '

          . 'width="' . $variables['settings']['pdf_width'] . '" '

          . 'height="' . $variables['settings']['pdf_height'] . '">'

          . '<embed src="' . $file_url . '#view=Fit' . '"'

          . 'width="' . $variables['settings']['pdf_width'] . '" '

          . 'height="' . $variables['settings']['pdf_height'] . '" '

          . 'type="application/pdf">'

          . '<p>' . t('It appears your Web browser is not configured to display PDF files. ')

          . l(t('Download adobe Acrobat '), 'http://www.adobe.com/products/reader.html')

          . ' ' . t('or') . ' ' . l(t('click here to download the PDF file.'), $file_url) . '</p>'

          . '</embed></object>';

      break;

    case 'pdf-js':

      _pdf_reader_load_pdf_js($file_url);

      $output = theme('pdf_js');

      break;

  }

  if ($variables['settings']['download'] == TRUE) {

    $output .= l(t('Click here to download the PDF file.'), $file_url, array('attributes' => array('class' => 'pdf-reader-download-link')));

  }

  if ($variables['settings']['colorbox'] == TRUE) {

    $html = $output;

    $options = array(

      'attributes' => array('class' => array('colorbox-inline', 'show')),

      'query' => array(

        'width' => $variables['settings']['pdf_width'],

        'height' => $variables['settings']['pdf_height'],

        'inline' => 'true',

      ),

      'fragment' => 'pdf_reader',

    );

    $output = l(t($variables['settings']['colorbox_link_text']), $file_url, $options);

    $output .= '<div style="display:none">' . $html . '</div>';

  }

  return $output;

}

function _pdf_reader_load_pdf_js($file_url) {

  $path = drupal_get_path('module', 'pdf_reader');

  $d_path = base_path() . $path;

  drupal_add_js("$path/js/pdf.js");

  drupal_add_js("PDFJS.workerSrc = '$d_path/js/pdf.js'", 'inline');

  drupal_add_js("$path/js/l10n.js");

  drupal_add_js("$path/js/compatibility.js");

  drupal_add_js("$path/js/viewer.js");

  drupal_add_css("$path/css/pdf_reader-viewer.css");

  drupal_add_js('kDefaultURL = "' . $file_url . '";', 'inline');

}