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248 lines
6.1 KiB
TypeScript
248 lines
6.1 KiB
TypeScript
import Setting from '@joplin/lib/models/Setting';
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import shim from '@joplin/lib/shim';
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import { themeStyle } from '@joplin/lib/theme';
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const React = require('react');
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const { forwardRef, useImperativeHandle, useEffect, useMemo, useState, useCallback, useRef } = require('react');
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const { WebView } = require('react-native-webview');
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const { editorFont } = require('../global-style');
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export interface ChangeEvent {
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value: string;
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}
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export interface UndoRedoDepthChangeEvent {
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undoDepth: number;
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redoDepth: number;
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}
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export interface Selection {
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start: number;
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end: number;
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}
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export interface SelectionChangeEvent {
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selection: Selection;
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}
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type ChangeEventHandler = (event: ChangeEvent)=> void;
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type UndoRedoDepthChangeHandler = (event: UndoRedoDepthChangeEvent)=> void;
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type SelectionChangeEventHandler = (event: SelectionChangeEvent)=> void;
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interface Props {
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themeId: number;
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initialText: string;
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initialSelection?: Selection;
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style: any;
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onChange: ChangeEventHandler;
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onSelectionChange: SelectionChangeEventHandler;
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onUndoRedoDepthChange: UndoRedoDepthChangeHandler;
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}
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function fontFamilyFromSettings() {
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const f = editorFont(Setting.value('style.editor.fontFamily'));
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return [f, 'sans-serif'].join(', ');
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}
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function useCss(themeId: number): string {
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return useMemo(() => {
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const theme = themeStyle(themeId);
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return `
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:root {
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background-color: ${theme.backgroundColor};
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}
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body {
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font-size: 13pt;
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}
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`;
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}, [themeId]);
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}
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function useHtml(css: string): string {
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const [html, setHtml] = useState('');
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useEffect(() => {
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setHtml(
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`
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
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<style>
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.cm-editor {
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height: 100%;
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}
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${css}
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</style>
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</head>
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<body style="margin:0; height:100vh; width:100vh; width:100vw; min-width:100vw; box-sizing: border-box; padding: 10px;">
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<div class="CodeMirror" style="height:100%;" autocapitalize="on"></div>
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</body>
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</html>
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`
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);
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}, [css]);
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return html;
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}
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function editorTheme(themeId: number) {
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return {
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...themeStyle(themeId),
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fontSize: 0.85, // em
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fontFamily: fontFamilyFromSettings(),
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};
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}
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function NoteEditor(props: Props, ref: any) {
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const [source, setSource] = useState(undefined);
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const webviewRef = useRef(null);
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const setInitialSelectionJS = props.initialSelection ? `
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cm.select(${props.initialSelection.start}, ${props.initialSelection.end});
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` : '';
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const injectedJavaScript = `
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function postMessage(name, data) {
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window.ReactNativeWebView.postMessage(JSON.stringify({
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data,
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name,
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}));
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}
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function logMessage(...msg) {
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postMessage('onLog', { value: msg });
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}
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// This variable is not used within this script
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// but is called using "injectJavaScript" from
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// the wrapper component.
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window.cm = null;
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try {
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${shim.injectedJs('codeMirrorBundle')};
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const parentElement = document.getElementsByClassName('CodeMirror')[0];
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const theme = ${JSON.stringify(editorTheme(props.themeId))};
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const initialText = ${JSON.stringify(props.initialText)};
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cm = codeMirrorBundle.initCodeMirror(parentElement, initialText, theme);
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${setInitialSelectionJS}
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// Fixes https://github.com/laurent22/joplin/issues/5949
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window.onresize = () => {
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cm.scrollSelectionIntoView();
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};
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} catch (e) {
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window.ReactNativeWebView.postMessage("error:" + e.message + ": " + JSON.stringify(e))
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}
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true;
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`;
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const css = useCss(props.themeId);
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const html = useHtml(css);
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useImperativeHandle(ref, () => {
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return {
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undo: function() {
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webviewRef.current.injectJavaScript('cm.undo(); true;');
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},
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redo: function() {
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webviewRef.current.injectJavaScript('cm.redo(); true;');
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},
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select: (anchor: number, head: number) => {
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webviewRef.current.injectJavaScript(
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`cm.select(${JSON.stringify(anchor)}, ${JSON.stringify(head)}); true;`
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);
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},
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insertText: (text: string) => {
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webviewRef.current.injectJavaScript(`cm.insertText(${JSON.stringify(text)}); true;`);
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},
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};
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});
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useEffect(() => {
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let cancelled = false;
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async function createHtmlFile() {
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const tempFile = `${Setting.value('resourceDir')}/NoteEditor.html`;
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await shim.fsDriver().writeFile(tempFile, html, 'utf8');
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if (cancelled) return;
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setSource({
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uri: `file://${tempFile}?r=${Math.round(Math.random() * 100000000)}`,
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baseUrl: `file://${Setting.value('resourceDir')}/`,
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});
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}
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void createHtmlFile();
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return () => {
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cancelled = true;
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};
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}, [html]);
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const onMessage = useCallback((event: any) => {
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const data = event.nativeEvent.data;
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if (data.indexOf('error:') === 0) {
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console.error('CodeMirror:', data);
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return;
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}
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const msg = JSON.parse(data);
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const handlers: Record<string, Function> = {
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onLog: (event: any) => {
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console.info('CodeMirror:', ...event.value);
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},
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onChange: (event: ChangeEvent) => {
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props.onChange(event);
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},
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onUndoRedoDepthChange: (event: UndoRedoDepthChangeEvent) => {
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console.info('onUndoRedoDepthChange', event);
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props.onUndoRedoDepthChange(event);
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},
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onSelectionChange: (event: SelectionChangeEvent) => {
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props.onSelectionChange(event);
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},
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};
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if (handlers[msg.name]) {
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handlers[msg.name](msg.data);
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} else {
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console.info('Unsupported CodeMirror message:', msg);
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}
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}, [props.onChange]);
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const onError = useCallback(() => {
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console.error('NoteEditor: webview error');
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});
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// - `setSupportMultipleWindows` must be `true` for security reasons:
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// https://github.com/react-native-webview/react-native-webview/releases/tag/v11.0.0
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// - `scrollEnabled` prevents iOS from scrolling the document (has no effect on Android)
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// when the editor is focused.
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return <WebView
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style={props.style}
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ref={webviewRef}
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scrollEnabled={false}
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useWebKit={true}
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source={source}
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setSupportMultipleWindows={true}
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allowingReadAccessToURL={`file://${Setting.value('resourceDir')}`}
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originWhitelist={['file://*', './*', 'http://*', 'https://*']}
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allowFileAccess={true}
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injectedJavaScript={injectedJavaScript}
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onMessage={onMessage}
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onError={onError}
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/>;
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}
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export default forwardRef(NoteEditor);
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