pdf.module in PDF 6

File

pdf.module

<?php

/**
 * Implementation of hook_menu().
 */
function pdf_menu() {
  $items = array();
  $items['pdf/worker_loader.js'] = array(
    'page callback' => 'pdf_worker_loader_js',
    'access callback' => TRUE,
    'type' => MENU_CALLBACK,
  );
  $items['file/pdf_viewer/%node'] = array(
    //%node to make a node_load
    'page callback' => 'pdf_js_viewer',
    'page arguments' => array(
      2,
    ),
    'access callback' => TRUE,
    'type' => MENU_CALLBACK,
  );
  return $items;
}

/**
 * Implementation of hook_theme().
 */
function pdf_theme() {
  $theme = array(
    'pdf_formatter_iframe' => array(
      'arguments' => array(
        'element' => NULL,
      ),
    ),
    'pdf_formatter_thumbnail' => array(
      'arguments' => array(
        'element' => NULL,
      ),
    ),
    'pdf_viewer' => array(
      'template' => 'pdf-viewer',
      'arguments' => array(
        'file' => NULL,
        'node' => NULL,
        'language' => NULL,
      ),
    ),
  );
  return $theme;
}
function pdf_js_viewer($node) {

  //if needed take localization into account...
  global $language;
  $file = $node->field_filefield[0];
  print theme('pdf_viewer', $file, $node, $language);
  exit;
}

/**
 * Preprocessor for theme function pdf_viewer
 */
function template_preprocess_pdf_viewer(&$variables) {
  $variables['nid'] = $variables['node']->nid;
  $variables['file_url'] = file_create_url($variables['file']['filepath']);
}
function pdf_worker_loader_js() {
  global $base_url;
  $output = "importScripts('{$base_url}/sites/all/libraries/pdf.js/build/pdf.js');";
  print $output;
  exit;
}

/**
 * Implements hook_field_formatter_info().
 */
function pdf_field_formatter_info() {
  return array(
    'iframe' => array(
      'label' => t('PDF iframe'),
      'field types' => array(
        'filefield',
      ),
    ),
    'thumbnail' => array(
      'label' => t('PDF first page'),
      'field types' => array(
        'filefield',
      ),
    ),
  );
}

/**
 * Formatter theme function for file fields : default: function calls hook_menu file/pdf_viewer/%node which calls pdf_js_viewer
 */
function theme_pdf_formatter_iframe($element) {
  global $language;
  $content = '<iframe class="pdf" frameborder="no" width="100%" height="1050px" src="';
  $content .= $language->language . '/file/pdf_viewer/' . $element['#node']->nid;
  $content .= '"></iframe>';
  return $content;
}

/**
 * Formatter theme function for file fields : thumbnail
 */
function theme_pdf_formatter_thumbnail($element) {
  if (isset($element['#item'])) {
    $file_url = file_create_url($element['#item']['filepath']);
  }
  drupal_add_js('sites/all/libraries/pdf.js' . '/build/pdf.js');
  $worker_loader = url('pdf/worker_loader.js');
  $js = "PDFJS.workerSrc = '{$worker_loader}';";
  $js .= "'use strict';\n  PDFJS.getDocument('{$file_url}').then(function(pdf) {\n    pdf.getPage(1).then(function(page) {\n      var scale = 1.5;\n      var viewport = page.getViewport(scale);\n      var canvas = document.getElementById('the-canvas');\n      var context = canvas.getContext('2d');\n      canvas.height = viewport.height;\n      canvas.width = viewport.width;\n      var renderContext = {\n        canvasContext: context,\n        viewport: viewport\n      };\n      page.render(renderContext);\n    });\n  });\n  ";
  drupal_add_js($js, 'inline', 'footer', FALSE, TRUE, FALSE);
  $output = '<canvas id="the-canvas" style="width:100%; border:1px solid black;"/>';
  return $output;
}

Functions

Name	Description
pdf_field_formatter_info	Implements hook_field_formatter_info().
pdf_js_viewer
pdf_menu	Implementation of hook_menu().
pdf_theme	Implementation of hook_theme().
pdf_worker_loader_js
template_preprocess_pdf_viewer	Preprocessor for theme function pdf_viewer
theme_pdf_formatter_iframe	Formatter theme function for file fields : default: function calls hook_menu file/pdf_viewer/%node which calls pdf_js_viewer
theme_pdf_formatter_thumbnail	Formatter theme function for file fields : thumbnail