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joplin/ElectronClient/app/gui/NoteTextViewer.jsx

121 lines
3.3 KiB
JavaScript

const React = require('react');
const { connect } = require('react-redux');
const { themeStyle } = require('../theme.js');
const { _ } = require('lib/locale.js');
class NoteTextViewerComponent extends React.Component {
constructor() {
super();
this.initialized_ = false;
this.webviewRef_ = React.createRef();
this.webviewListeners_ = null;
this.webview_domReady = this.webview_domReady.bind(this);
this.webview_ipcMessage = this.webview_ipcMessage.bind(this);
}
webview_domReady(event) {
this.props.onDomReady(event);
}
webview_ipcMessage(event) {
this.props.onIpcMessage(event);
}
initWebview() {
const wv = this.webviewRef_.current;
if (!this.webviewListeners_) {
this.webviewListeners_ = {
'dom-ready': this.webview_domReady.bind(this),
'ipc-message': this.webview_ipcMessage.bind(this),
};
}
for (let n in this.webviewListeners_) {
if (!this.webviewListeners_.hasOwnProperty(n)) continue;
const fn = this.webviewListeners_[n];
wv.addEventListener(n, fn);
}
}
destroyWebview() {
const wv = this.webviewRef_.current;
if (!wv || !this.initialized_) return;
for (let n in this.webviewListeners_) {
if (!this.webviewListeners_.hasOwnProperty(n)) continue;
const fn = this.webviewListeners_[n];
wv.removeEventListener(n, fn);
}
}
componentDidUpdate() {
if (!this.initialized_ && this.webviewRef_.current) {
this.initWebview();
this.initialized_ = true;
}
}
componentWillUnmount() {
this.destroyWebview();
}
// ----------------------------------------------------------------
// Wrap WebView functions
// ----------------------------------------------------------------
send(channel, arg0 = null, arg1 = null, arg2 = null, arg3 = null) {
return this.webviewRef_.current.send(channel, arg0, arg1, arg2, arg3);
}
printToPDF(options, callback) {
// In Electron 4x, printToPDF is broken so need to use this hack:
// https://github.com/electron/electron/issues/16171#issuecomment-451090245
// return this.webviewRef_.current.printToPDF(options, callback);
return this.webviewRef_.current.getWebContents().printToPDF(options, callback);
}
print(options = {}) {
// In Electron 4x, print is broken so need to use this hack:
// https://github.com/electron/electron/issues/16219#issuecomment-451454948
// Note that this is not a perfect workaround since it means the options are ignored
// In particular it means that background images and colours won't be printed (printBackground property will be ignored)
// return this.webviewRef_.current.getWebContents().print({});
return this.webviewRef_.current.getWebContents().executeJavaScript("window.print()")
}
openDevTools() {
return this.webviewRef_.current.openDevTools();
}
// ----------------------------------------------------------------
// Wrap WebView functions (END)
// ----------------------------------------------------------------
render() {
return <webview
ref={this.webviewRef_}
style={this.props.viewerStyle}
preload="gui/note-viewer/preload.js"
src="gui/note-viewer/index.html"
webpreferences="contextIsolation"
/>
}
}
const mapStateToProps = (state) => {
return {
theme: state.settings.theme,
};
};
const NoteTextViewer = connect(mapStateToProps, null, null, { withRef: true })(NoteTextViewerComponent);
module.exports = NoteTextViewer;