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6 |
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7 | import React from 'react';
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8 | import {
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9 | View,
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10 | ActivityIndicator,
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11 | StyleSheet,
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12 | WebView,
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13 | Platform,
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14 | Alert
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15 | } from 'react-native';
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16 | import PropTypes from 'prop-types';
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17 | import { Asset } from 'expo';
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18 |
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19 |
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20 |
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21 | const INDEX_FILE_PATH = `./assets/dist/reactQuillEditor-index.html`;
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22 | const INDEX_FILE_ASSET_URI = Asset.fromModule(require(INDEX_FILE_PATH)).uri;
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23 | const MESSAGE_PREFIX = 'react-native-webview-quilljs';
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24 |
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25 | export default class WebViewQuillEditor extends React.Component {
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26 | constructor() {
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27 | super();
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28 | this.webview = null;
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29 | this.state = {
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30 | webViewNotLoaded: true
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31 | };
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32 | }
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33 |
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34 | createWebViewRef = (webview) => {
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35 | this.webview = webview;
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36 | };
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37 |
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38 | handleMessage = (event) => {
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39 | let msgData;
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40 | try {
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41 | msgData = JSON.parse(event.nativeEvent.data);
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42 | if (
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43 | msgData.hasOwnProperty('prefix') &&
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44 | msgData.prefix === MESSAGE_PREFIX
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45 | ) {
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46 | console.log(`WebViewQuillEditor: received message ${msgData.type}`);
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47 | this.sendMessage('MESSAGE_ACKNOWLEDGED');
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48 | console.log(`WebViewQuillEditor: sent MESSAGE_ACKNOWLEDGED`);
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49 |
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50 | switch (msgData.type) {
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51 | case 'EDITOR_LOADED':
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52 | this.editorLoaded();
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53 | break;
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54 | case 'EDITOR_SENT':
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55 | this.props.getEditorCallback(msgData.payload.editor);
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56 | break;
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57 | case 'TEXT_CHANGED':
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58 | if (this.props.onDeltaChangeCallback) {
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59 | delete msgData.payload.type;
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60 | let {deltaChange, delta, deltaOld, changeSource } = msgData.payload;
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61 | this.props.onDeltaChangeCallback(deltaChange, deltaChange, deltaOld, changeSource );
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62 | }
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63 | break;
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64 | case 'RECEIVE_DELTA':
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65 | if (this.props.getDeltaCallback)
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66 | this.props.getDeltaCallback(msgData.payload);
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67 | break;
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68 | default:
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69 | console.warn(
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70 | `WebViewQuillEditor Error: Unhandled message type received "${
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71 | msgData.type
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72 | }"`
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73 | );
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74 | }
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75 | }
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76 | } catch (err) {
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77 | console.warn(err);
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78 | return;
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79 | }
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80 | };
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81 |
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82 | onWebViewLoaded = () => {
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83 | console.log('Webview loaded');
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84 | this.setState({ webViewNotLoaded: false });
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85 | this.sendMessage('LOAD_EDITOR');
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86 | if (this.props.hasOwnProperty('backgroundColor')) {
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87 | this.sendMessage('SET_BACKGROUND_COLOR', {
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88 | backgroundColor: this.props.backgroundColor
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89 | });
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90 | }
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91 | if (this.props.hasOwnProperty('onLoad')) {
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92 | this.props.onLoad();
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93 | }
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94 | if (this.props.hasOwnProperty('getEditorCallback')) {
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95 | this.sendMessage('SEND_EDITOR');
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96 | }
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97 | };
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98 |
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99 | editorLoaded = () => {
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100 |
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101 | if (this.props.hasOwnProperty('contentToDisplay')) {
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102 | console.log(this.props.contentToDisplay);
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103 | this.sendMessage('SET_CONTENTS', {
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104 | delta: this.props.contentToDisplay
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105 | });
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106 | }
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107 | if (this.props.hasOwnProperty('htmlContentToDisplay')) {
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108 | this.sendMessage('SET_HTML_CONTENTS', {
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109 | html: this.props.htmlContentToDisplay
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110 | });
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111 | }
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112 | };
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113 |
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114 | sendMessage = (type, payload) => {
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115 |
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116 | if (this.webview) {
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117 | console.log(`WebViewQuillEditor: sending message ${type}`);
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118 | this.webview.postMessage(
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119 | JSON.stringify({
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120 | prefix: MESSAGE_PREFIX,
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121 | type,
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122 | payload
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123 | }),
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124 | '*'
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125 | );
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126 | }
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127 | };
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128 |
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129 |
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130 |
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131 | getDelta = () => {
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132 | this.sendMessage('GET_DELTA');
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133 | };
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134 |
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135 | showLoadingIndicator = () => {
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136 | return (
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137 | <View style={styles.activityOverlayStyle}>
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138 | <View style={styles.activityIndicatorContainer}>
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139 | <ActivityIndicator
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140 | size="large"
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141 | animating={this.state.webViewNotLoaded}
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142 | color="green"
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143 | />
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144 | </View>
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145 | </View>
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146 | );
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147 | };
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148 |
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149 | onError = (error) => {
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150 | Alert.alert('WebView onError', error, [
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151 | { text: 'OK', onPress: () => console.log('OK Pressed') }
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152 | ]);
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153 | };
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154 |
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155 | renderError = (error) => {
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156 | Alert.alert('WebView renderError', error, [
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157 | { text: 'OK', onPress: () => console.log('OK Pressed') }
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158 | ]);
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159 | };
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160 |
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161 | render = () => {
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162 | return (
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163 | <View
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164 | style={{
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165 | flex: 1
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166 | }}
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167 | >
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168 | <WebView
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169 | style={{ ...StyleSheet.absoluteFillObject }}
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170 | ref={this.createWebViewRef}
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171 | source={
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172 | Platform.OS === 'ios'
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173 | ? require('./assets/dist/reactQuillEditor-index.html')
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174 | : { uri: INDEX_FILE_ASSET_URI }
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175 | }
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176 | onLoadEnd={this.onWebViewLoaded}
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177 | onMessage={this.handleMessage}
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178 | startInLoadingState={true}
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179 | renderLoading={this.showLoadingIndicator}
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180 | renderError={this.renderError}
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181 | javaScriptEnabled={true}
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182 | onError={this.onError}
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183 | scalesPageToFit={false}
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184 | mixedContentMode={'always'}
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185 | domStorageEnabled={true}
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186 | />
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187 | </View>
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188 | );
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189 | };
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190 | }
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191 |
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192 | WebViewQuillEditor.propTypes = {
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193 | getDeltaCallback: PropTypes.func,
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194 | onDeltaChangeCallback: PropTypes.func,
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195 | backgroundColor: PropTypes.string,
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196 | onLoad: PropTypes.func
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197 | };
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198 |
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199 |
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200 | WebViewQuillEditor.defaultProps = {
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201 | theme: 'snow'
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202 | };
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203 |
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204 | const styles = StyleSheet.create({
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205 | activityOverlayStyle: {
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206 | ...StyleSheet.absoluteFillObject,
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207 | display: 'flex',
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208 | justifyContent: 'center',
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209 | alignContent: 'center',
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210 | borderRadius: 0
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211 | },
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212 | activityIndicatorContainer: {
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213 | backgroundColor: 'white',
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214 | padding: 10,
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215 | borderRadius: 50,
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216 | alignSelf: 'center',
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217 | shadowColor: '#000000',
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218 | shadowOffset: {
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219 | width: 0,
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220 | height: 3
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221 | },
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222 | shadowRadius: 5,
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223 | shadowOpacity: 1.0
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224 | }
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225 | });
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