ghills/pdftron-react-native

A convenience wrapper for building react native apps with PDFTron mobile SDK.

PDFTron React Native Wrapper

• Prerequisites
• Preview
• Installation
• Usage
• Components
• License

Prerequisites

• No license key is required for trial. However, a valid commercial license key is required after trial.
• npm or yarn
• PDFTron SDK >= 6.10.0
• react-native >= 0.60.0 (for versions before 0.60.0, use branch rn553)

Preview

Android	iOS

Installation

0. If using yarn, do: yarn global add react-native-cli

1. First, follow the official getting started guide on setting up the React Native environment, setting up the iOS environment, setting up the Android environment, and creating a React Native project, the following steps will assume your app is created through react-native init MyApp.

2. In MyApp folder, install react-native-pdftron by calling:

   yarn add github:PDFTron/pdftron-react-native
   yarn add @react-native-community/cli --dev
   yarn add @react-native-community/cli-platform-android --dev
   yarn add @react-native-community/cli-platform-ios --dev
   yarn install

   or

   npm install github:PDFTron/pdftron-react-native --save
   npm install @react-native-community/cli --save-dev
   npm install @react-native-community/cli-platform-android --save-dev
   npm install @react-native-community/cli-platform-ios --save-dev

Android

1. Add the following in your android/app/build.gradle file:

   android {
       compileSdkVersion rootProject.ext.compileSdkVersion
   
       compileOptions {
           sourceCompatibility JavaVersion.VERSION_1_8
           targetCompatibility JavaVersion.VERSION_1_8
       }
   
       defaultConfig {
           applicationId "com.reactnativesample"
           minSdkVersion rootProject.ext.minSdkVersion
           targetSdkVersion rootProject.ext.targetSdkVersion
           versionCode 1
           versionName "1.0"
   +       multiDexEnabled true
       }
   
       dependencies {
   +       implementation "androidx.multidex:multidex:2.0.1"
       }
   
       ...
   }

2. Add the following to your android/app/src/main/AndroidManifest.xml file:

   <manifest xmlns:android="http://schemas.android.com/apk/res/android"
       package="com.myapp">
   
     <application
       ...
   +   android:largeHeap="true"
   +   android:usesCleartextTraffic="true">
   
       <activity
         android:name=".MainActivity"
         android:label="@string/app_name"
         android:configChanges="keyboard|keyboardHidden|orientation|screenSize"
   -     android:windowSoftInputMode="adjustResize"
   +     android:windowSoftInputMode="adjustPan"
   +     android:theme="@style/CustomAppTheme">
         <intent-filter>
             <action android:name="android.intent.action.MAIN" />
             <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
       </activity>
       <activity android:name="com.facebook.react.devsupport.DevSettingsActivity" />
     </application>
   </manifest>

3. In your android\app\src\main\java\com\myapp\MainApplication.java file, change Application to MultiDexApplication:

   - import android.app.Application;
   + import androidx.multidex.MultiDexApplication;
   ...
   - public class MainApplication extends Application implements ReactApplication {
   + public class MainApplication extends MultiDexApplication implements ReactApplication {

4. Replace App.js with what is shown here

5. Finally in the root project directory, run react-native run-android.

iOS

1. Open Podfile in the ios folder, add:

   target 'MyApp' do
       use_frameworks!
       pod 'PDFNet', podspec: 'https://www.pdftron.com/downloads/ios/cocoapods/pdfnet/latest.podspec'
       pod 'RNPdftron', :path => '../node_modules/react-native-pdftron'
   end
   

2. In the ios folder, run pod install.

3. (Optional) If you need a close button icon, you will need to add the PNG resources to MyApp as well, i.e. ic_close_black_24px.

4. Replace App.js with what is shown here.

5. Finally in the root project directory, run react-native run-ios.

Usage

Replace App.js with the following:

import React, { Component } from 'react';
import {
  Platform,
  StyleSheet,
  Text,
  View,
  PermissionsAndroid,
  BackHandler,
  NativeModules,
  Alert
} from 'react-native';

import { DocumentView, RNPdftron } from 'react-native-pdftron';

type Props = {};
export default class App extends Component<Props> {

  constructor(props) {
    super(props);

    this.state = {
      permissionGranted: Platform.OS === 'ios' ? true : false
    };

    RNPdftron.initialize("Insert commercial license key here after purchase");
    RNPdftron.enableJavaScript(true);
  }

  componentDidMount() {
    if (Platform.OS === 'android') {
      this.requestStoragePermission();
    }
  }

  async requestStoragePermission() {
    try {
      const granted = await PermissionsAndroid.request(
        PermissionsAndroid.PERMISSIONS.WRITE_EXTERNAL_STORAGE
      );
      if (granted === PermissionsAndroid.RESULTS.GRANTED) {
        this.setState({
          permissionGranted: true
        });
        console.log("Storage permission granted");
      } else {
        this.setState({
          permissionGranted: false
        });
        console.log("Storage permission denied");
      }
    } catch (err) {
      console.warn(err);
    }
  }

  onLeadingNavButtonPressed = () => {
    console.log('leading nav button pressed');
    if (Platform.OS === 'ios') {
      Alert.alert(
        'App',
        'onLeadingNavButtonPressed',
        [
          {text: 'OK', onPress: () => console.log('OK Pressed')},
        ],
        { cancelable: true }
      )
    } else {
      BackHandler.exitApp();
    }
  }

  render() {
    if (!this.state.permissionGranted) {
      return (
        <View style={styles.container}>
          <Text>
            Storage permission required.
          </Text>
        </View>
      )
    }

    const path = "https://pdftron.s3.amazonaws.com/downloads/pl/PDFTRON_mobile_about.pdf";

    return (
      <DocumentView
        document={path}
        showLeadingNavButton={true}
        leadingNavButtonIcon={Platform.OS === 'ios' ? 'ic_close_black_24px.png' : 'ic_arrow_back_white_24dp'}
        onLeadingNavButtonPressed={this.onLeadingNavButtonPressed}
      />
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#F5FCFF',
  }
});

• (iOS) For app bundle file path:

document="sample"

• (Android) For local storage file path:

document="file:///storage/emulated/0/Download/sample.pdf"

• (Android) For raw resource path (include file extension):

document="android.resource://mypackagename/raw/sample.pdf"

• (Android) For content Uri:

document="content://..."

Components

DocumentView

A component for displaying documents of different types such as PDF, docx, pptx, xlsx and various image formats.

Props

• document
• password
• leadingNavButtonIcon
• onLeadingNavButtonPressed
• showLeadingNavButton
• onDocumentLoaded
• onDocumentError
• disabledElements
• disabledTools
• customHeaders
• readOnly
• annotationAuthor
• continuousAnnotationEditing
• fitMode
• layoutMode
• initialPageNumber
• pageNumber
• topToolbarEnabled
• bottomToolbarEnabled
• pageIndicatorEnabled
• onAnnotationChanged

document

string, required

password

string, optional

leadingNavButtonIcon

string, optional

onLeadingNavButtonPressed

function, optional

showLeadingNavButton

bool, optional

onDocumentLoaded

function, optional

onDocumentError

function, optional

disabledElements

array of string, optional

disabledTools

array of string, optional

customHeaders

object, optional

readOnly

bool, optional

annotationAuthor

string, optional

continuousAnnotationEditing

bool, optional

fitMode

string, optional

layoutMode

string, optional

initialPageNumber

number, optional

pageNumber

number, optional

onPageChanged

function, optional

Perameters:

Name	Type	Description
previousPageNumber	int	the previous page number
pageNumber	int	the current page number

topToolbarEnabled

bool, optional

bottomToolbarEnabled

bool, optional

pageIndicatorEnabled

bool, optional

onAnnotationChanged

function, optional

Perameters:

Name	Type	Description
action	string	the action that occurred (add, delete, modify)
annotations	array	array of annotation data in the format {id: string, pageNumber: int}

Example:

import { DocumentView, Config } from 'react-native-pdftron';
<DocumentView
  ref={(c) => this._viewer = c}
  document={path}
  showLeadingNavButton={true}
  leadingNavButtonIcon={Platform.OS === 'ios' ? 'ic_close_black_24px.png' : 'ic_arrow_back_white_24dp'}
  onLeadingNavButtonPressed={() => {}}
  onDocumentLoaded={() => {}}
  onDocumentError={() => {}}
  disabledElements={[Config.Buttons.searchButton, Config.Buttons.shareButton]}
  disabledTools={[Config.Tools.annotationCreateLine, Config.Tools.annotationCreateRectangle]}
  customHeaders={{Foo: bar}}
  initialPageNumber={11}
  readOnly={false}
  annotationAuthor={'PDFTron'}
  continuousAnnotationEditing={true}
  fitMode={Config.FitMode.FitPage}
  layoutMode={Config.LayoutMode.Continuous}
  onPageChanged={({previousPageNumber, pageNumber}) => { console.log('page changed'); }}
  onAnnotationChanged={({action, annotations}) => { console.log('annotations changed'); }}
/>

Methods

• setToolMode
• getPageCount
• importAnnotations
• exportAnnotations
• flattenAnnotations
• saveDocument

setToolMode

To set the current tool mode (Config.Tools constants).

this._viewer.setToolMode(Config.Tools.annotationCreateFreeHand);

getPageCount

To get the current page count of the document.

Returns a Promise.

this._viewer.getPageCount().then((pageCount) => {
  console.log('pageCount', pageCount);
});

importAnnotations

To import XFDF string to the current document.

Returns a Promise.

const xfdf = '<?xml version="1.0" encoding="UTF-8"?>\n<xfdf xmlns="http://ns.adobe.com/xfdf/" xml:space="preserve">...</xfdf>';
this._viewer.importAnnotations(xfdf);

exportAnnotations

To extract XFDF from the current document.

Perameters:

Name	Type	Description
options	object	key: annotList, type: array

Returns a Promise.

this._viewer.exportAnnotations().then((xfdf) => {
  console.log('xfdf', xfdf);
});

With options:

// annotList is an array of annotation data in the format {id: string, pageNumber: int}
this._viewer.exportAnnotations({annotList: annotations}).then((xfdf) => {
  console.log('xfdf for annotations', xfdf);
});

flattenAnnotations

To flatten the forms and (optionally) annotations in the current document. The formsOnly parameter controls whether only forms are flattened.

Returns a Promise.

// flatten forms and annotations in the current document.
this._viewer.flattenAnnotations(false);

saveDocument

To save the current document.

Returns a Promise.

this._viewer.saveDocument().then(() => {
  console.log('saveDocument');
});

Contributing

See Contributing

License

See License