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

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

PDFTron React Native Wrapper A convenience wrapper for building react native apps with PDFTron mobile SDK

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
demo demo

Installation

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

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

  3. 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
    +       manifestPlaceholders = [pdftronLicenseKey:PDFTRON_LICENSE_KEY]
        }
    
        dependencies {
    +       implementation "androidx.multidex:multidex:2.0.1"
        }
    
        ...
    }
  2. Add the following to your android/build.gradle file:

    buildscript {
        ext {
        buildToolsVersion = "28.0.3"
    +    minSdkVersion = 21
        compileSdkVersion = 28
        targetSdkVersion = 28
        }
        // ...
    }
  3. In your android/gradle.properties file. Add the following line to it:

    # Add the PDFTRON_LICENSE_KEY variable here. 
    # For trial purposes leave it blank.
    # For production add a valid commercial license key.
    PDFTRON_LICENSE_KEY=
  4. 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">
    
        <uses-permission android:name="android.permission.INTERNET" />
        <!-- Required to read and write documents from device storage -->
    +    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
        <!-- Required if you want to record audio annotations -->
    +    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    
      <application
        ...
    +   android:largeHeap="true"
    +   android:usesCleartextTraffic="true">
    
        <!-- Add license key in meta-data tag here. This should be inside the application tag. -->
    +   <meta-data
    +       android:name="pdftron_license_key"
    +       android:value="${pdftronLicenseKey}"/>
    
        <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>
  5. 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 {
  6. Replace App.js with what is shown here

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

iOS

  1. Open Podfile in the ios folder, add the 3 middle lines to the target 'MyApp' do / end block:

    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
    

    and remove or comment out the Flipper section:

    # use_flipper!
    # post_install do |installer|
    #   flipper_post_install(installer)
    # 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://..."

API

RNPdftron

initialize

initialize(string)

enableJavaScript

enableJavaScript(bool)

getVersion

getVersion()

Return a promise with the version of the PDFNet version used.

getPlatformVersion

getPlatformVersion()

Return a promise with the version of current platform (Android/iOS).

encryptDocument

encryptDocument(string, string, string)

This function does not lock around the document so be sure to not use it while the document is opened in the viewer.

Return a promise.

Example:

RNPdftron.encryptDocument("/sdcard/Download/new.pdf", "1111", "").then(() => {
  console.log("done password");
});

Parameters:

Name Type Description
file path string the local file path to the file
password string the password
current password string the current password, use empty string if no password

Components

DocumentView

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

Props
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, default to false

thumbnailViewEditingEnabled

bool, optional, default to true

annotationAuthor

string, optional

continuousAnnotationEditing

bool, optional

selectAnnotationAfterCreation

bool, optional, default to true

fitMode

string, optional

layoutMode

string, optional

initialPageNumber

number, optional

pageNumber

number, optional

onPageChanged

function, optional

onZoomChanged

function, optional

Perameters:

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

bool, optional

bottomToolbarEnabled

bool, optional

hideToolbarsOnTap

bool, optional

Whether an unhandled tap in the viewer should toggle the visibility of the top and bottom toolbars. The default value is true. When false, the top and bottom toolbar visibility will not be toggled and the page content will fit between the bars, if any.

pageIndicatorEnabled

bool, optional

showSavedSignatures

bool, optional

isBase64String

bool, optional

If true, document prop will be treated as a base64 string.

When viewing a document initialized with a base64 string (ie a memory buffer), a temporary file is created on Android, and no temporary path is created on iOS.

padStatusBar

bool, optional, android only

If true, the viewer will add padding to take account of status bar. Default to false.

autoSaveEnabled

bool, optional

hideAnnotationMenu

array of Config.Tools string constants, optional

Defines annotation types that will not show the default annotation menu

annotationMenuItems

array of Config.AnnotationMenu string constants, optional

Defines menu items that can show when an annotation is selected.

overrideAnnotationMenuBehavior

array of Config.AnnotationMenu string constants, optional

Defines menu items that should skip default behavior.

onAnnotationMenuPress

function, optional

Defines what happens on annotation menu press if it is passed in to overrideAnnotationMenuBehavior

Parameters:

Name Type Description
annotationMenu string One of Config.AnnotationMenu string constants
annotations array An array of {id, rect} objects, where id is the annotation identifier and rect={x1, y1, x2, y2} specifies the annotation's screen rect.
longPressMenuEnabled

bool, optional, default to true

If true, the viewer will show the default menu on long press.

longPressMenuItems

array of Config.LongPressMenu string constants, optional

Defines menu items that can show when long press on text or blank space.

overrideLongPressMenuBehavior

array of Config.LongPressMenu string constants, optional

Defines menu items that should skip default behavior.

onLongPressMenuPress

function, optional

Defines what happens on long press menu press if it is passed in to overrideLongPressMenuBehavior

Parameters:

Name Type Description
longPressMenu string One of Config.LongPressMenu string constants
longPressText string the selected text if pressed on text, empty otherwise
overrideBehavior

array of Config.Actions string constants, optional

Defines actions that should skip default behavior, such as external link click.

onBehaviorActivated

function, optional

Defines what happens on certain behavior if it is passed in to overrideBehavior

Parameters:

Name Type Description
action string One of Config.Actions string constants
data object A JSON object that varies depending on the action

data param table:

Action Param
Config.Actions.linkPress key: url, value: the link pressed
pageChangeOnTap

bool, optional, default to true

useStylusAsPen

bool, optional, default to true

If true, stylus will act as a pen in pan mode, otherwise it will act as finger

signSignatureFieldsWithStamps

bool, optional, default to false

If true, signature field will be signed with image stamp. This is useful if you are saving XFDF to remote source.

followSystemDarkMode

bool, optional, Android only, default to true

If true, UI will appear in dark color when System is dark mode. Otherwise it will use viewer setting instead.

collabEnabled

bool, optional, if set to true then currentUser must be set as well for collaboration mode to work

currentUser

string, required if collabEnabled is set to true

currentUserName

string, optional

onExportAnnotationCommand

function, optional, annotation command will be given on each edit

onAnnotationsSelected

function, optional

Parameters:

Name Type Description
annotations array array of annotation data in the format {id: string, pageNumber: number, rect: {x1: number, y1: number, x2: number, y2: number}}
onAnnotationChanged

function, optional

Parameters:

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

bool, optional, default to false

If true, annotation's flags will be taken into account when it is selected, for example, a locked annotation can not be resized or moved.

onFormFieldValueChanged

function, optional

Parameters:

Name Type Description
fields array array of field data in the format {fieldName: string, fieldValue: string}
onBookmarkChanged

function, optional

Defines what happens if a change has been made to bookmarks

Parameters:

Name Type Description
bookmarkJson string the list of current bookmarks in JSON format

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'); }}
  annotationPermissionCheckEnabled={false}
  onBookmarkChanged={({bookmarkJson}) => { console.log('bookmark changed'); }}
/>
Methods
setToolMode

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

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

Commits the current tool, only available for multi-stroke ink and poly-shape.

Returns a Promise.

this._viewer.commitTool().then((committed) => {
  // committed: true if either ink or poly-shape tool is committed, false otherwise
});
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);
deleteAnnotations

To delete the specified annotations in the current document.

Returns a Promise.

// delete annotations in the current document.
this._viewer.deleteAnnotations([
    {
        id: 'annotId1',
        pageNumber: 1,
    },
    {
        id: 'annotId2',
        pageNumber: 2,
    }
]);
saveDocument

To save the current document.

Returns a Promise.

this._viewer.saveDocument().then((filePath) => {
  console.log('saveDocument:', filePath);
});
setFlagForFields

Set a field flag value on one or more form fields.

Parameters:

Name Type Description
fields array list of field names for which the flag should be set
flag integer flag to be set (see https://www.pdftron.com/api/ios/Enums/PTFieldFlag.html)
value bool value to set for flag

Returns a Promise.

this._viewer.setFlagForFields(['First Name', 'Last Name'], Config.FieldFlags.ReadOnly, true);
setValuesForFields

Set field values on one or more form fields.

Note: the old function setValueForFields is deprecated. Please use this one.

Parameters:

Name Type Description
fieldsMap object map of field names and values which should be set

Returns a Promise.

this._viewer.setValuesForFields({
  'textField1': 'Test',
  'textField2': 1234,
  'checkboxField1': true,
  'checkboxField2': false,
  'radioButton1': 'Yes',
  'radioButton2': 'No'
});
importAnnotationCommand

Import remote annotation command to local document.

Parameters:

Name Type Description
xfdfCommand string the XFDF command string
initialLoad bool whether this is for initial load

Returns a Promise.

handleBackButton

Android only.

this._viewer.handleBackButton().then((handled) => {
  if (!handled) {
    BackHandler.exitApp();
  }
});
selectAnnotation

To select the specified annotation in the current document.

Parameters:

Name Type Description
id string the id of the target annotation
pageNumber integer the page number where the targe annotation is located. It is 1-indexed

Return a Promise.

// select annotation in the current document.
this._viewer.selectAnnotation('annotId1', 1);
setFlagsForAnnotations

To set flags for specified annotations in the current document. The flagValue controls whether a flag will be set to or removed from the annotation.

Note: the old function setFlagForAnnotations is deprecated. Please use this one.

Parameters:

Name Type Description
annotationFlagList array A list of annotation flag operations

Return a Promise.

//  Set flag for annotations in the current document.
this._viewer.setFlagsForAnnotations([
    {
        id: 'annotId1',
        pageNumber: 1,
        flag: Config.AnnotationFlags.noView,
        flagValue: true
    },
    {
        id: 'annotId2',
        pageNumber: 5,
        flag: Config.AnnotationFlags.lockedContents,
        flagValue: false
    }
]);
setPropertiesForAnnotation

To set properties for specified annotation in the current document, if it is valid.

Note: the old function setPropertyForAnnotation is deprecated. Please use this one.

Parameters:

Name Type Description
annotationId string the unique id of the annotation
pageNumber integer the page number where annotation is located. It is 1-indexed
propertyMap object an object containing properties to be set. Available properties are listed below

Properties:

Name Type Markup exclusive Example
rect object no {x1: 1, y1: 2, x2: 3, y2: 4}
contents string no "contents"
subject string yes "subject"
title string yes "title"
contentRect object yes {x1: 1, y1: 2, x2: 3, y2: 4}

Return a promise.

// Set properties for annotation in the current document.
this._viewer.setPropertiesForAnnotation('Pdftron', 1, {
  rect: {
    x1: 1.1,    // left
    y1: 3,      // bottom
    x2: 100.9,  // right
    y2: 99.8    // top
  },
  contents: 'Hello World',
  subject: 'Sample',
  title: 'set-prop-for-annot'
});
getPageCropBox

Return a JSON object with properties for position (x1, y1, x2 and y2) and size (width and height) of the crop box for specified page.

Parameters:

Name Type Description
pageNumber integer the page number for the target crop box. It is 1-indexed

Return a Promise.

this._viewer.getPageCropBox(1).then((cropBox) => {
  console.log('bottom-left coordinate:', cropBox.x1, cropBox.y1);
  console.log('top-right coordinate:', cropBox.x2, cropBox.y2);
  console.log('width and height:', cropBox.width, cropBox.height);
});
importBookmarkJson

Imports user bookmarks to the document. The input needs to be a valid bookmark JSON format, for example {"0":"Page 1"}.

Parameters:

Name Type Description
bookmarkJson String needs to be in valid bookmark JSON format, for example {"0": "Page 1"}. The page numbers are 1-indexed

Return a Promise.

this._viewer.importBookmarkJson("{\"0\": \"Page 1\", \"3\": \"Page 4\"}");
setCurrentPage

Set current page of the document.

Parameters:

Name Type Description
pageNumber integer the page number for the target crop box. It is 1-indexed

Return a Promise (with a boolean that tells whether the setting process is successful).

this._viewer.setCurrentPage(4).then((success) => {
  if (success) {
    console.log("Current page is set to 4.");
  }
});
getDocumentPath

Return the path of the current document.

Return a Promise.

this._viewer.getDocumentPath().then((path) => {
  console.log('The path to current document is: ' + path);
});

Contributing

See Contributing

Download Details:

Author: PDFTron

Demo: https://www.pdftron.com/

Source Code: https://github.com/PDFTron/pdftron-react-native

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