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joplin/packages/app-mobile/components/NoteEditor/NoteEditor.tsx

335 lines
9.0 KiB
TypeScript

import Setting from '@joplin/lib/models/Setting';
import shim from '@joplin/lib/shim';
import { themeStyle } from '@joplin/lib/theme';
const React = require('react');
const { forwardRef, useImperativeHandle, useEffect, useState, useCallback, useRef } = require('react');
const { WebView } = require('react-native-webview');
const { editorFont } = require('../global-style');
export interface ChangeEvent {
value: string;
}
export interface UndoRedoDepthChangeEvent {
undoDepth: number;
redoDepth: number;
}
type ChangeEventHandler = (event: ChangeEvent)=> void;
type UndoRedoDepthChangeHandler = (event: UndoRedoDepthChangeEvent)=> void;
interface Props {
themeId: number;
initialText: string;
style: any;
onChange: ChangeEventHandler;
onUndoRedoDepthChange: UndoRedoDepthChangeHandler;
}
function fontFamilyFromSettings() {
const f = editorFont(Setting.value('style.editor.fontFamily'));
return [f, 'sans-serif'].join(', ');
}
// Obsolete with CodeMirror 6. See ./CodeMirror.ts for styling.
// function useCss(themeId:number):string {
// const [css, setCss] = useState('');
// // useEffect(() => {
// // const theme = themeStyle(themeId);
// // // Selection in dark mode is hard to see so make it brighter.
// // // https://discourse.joplinapp.org/t/dragging-in-dark-theme/12433/4?u=laurent
// // const selectionColorCss = theme.appearance === ThemeAppearance.Dark ?
// // `.CodeMirror-selected {
// // background: #6b6b6b !important;
// // }` : '';
// // const monospaceFonts = [];
// // // if (Setting.value('style.editor.monospaceFontFamily')) monospaceFonts.push(`"${Setting.value('style.editor.monospaceFontFamily')}"`);
// // monospaceFonts.push('monospace');
// // const fontSize = 15;
// // const fontFamily = fontFamilyFromSettings();
// // // BUG: caret-color seems to be ignored for some reason
// // const caretColor = theme.appearance === ThemeAppearance.Dark ? "white" : 'black';
// // setCss(`
// // /* These must be important to prevent the codemirror defaults from taking over*/
// // .CodeMirror {
// // font-family: ${fontFamily};
// // font-size: ${fontSize}px;
// // height: 100% !important;
// // width: 100% !important;
// // color: ${theme.color};
// // background-color: ${theme.backgroundColor};
// // position: absolute !important;
// // -webkit-box-shadow: none !important; // Some themes add a box shadow for some reason
// // }
// // .CodeMirror-lines {
// // /* This is used to enable the scroll-past end behaviour. The same height should */
// // /* be applied to the viewer. */
// // padding-bottom: 400px !important;
// // }
// // /* Left padding is applied at the editor component level, so we should remove it from the lines */
// // .CodeMirror pre.CodeMirror-line,
// // .CodeMirror pre.CodeMirror-line-like {
// // padding-left: 0;
// // }
// // .CodeMirror-sizer {
// // /* Add a fixed right padding to account for the appearance (and disappearance) */
// // /* of the sidebar */
// // padding-right: 10px !important;
// // }
// // /* This enforces monospace for certain elements (code, tables, etc.) */
// // .cm-jn-monospace {
// // font-family: ${monospaceFonts.join(', ')} !important;
// // }
// // .cm-header-1 {
// // font-size: 1.5em;
// // }
// // .cm-header-2 {
// // font-size: 1.3em;
// // }
// // .cm-header-3 {
// // font-size: 1.1em;
// // }
// // .cm-header-4, .cm-header-5, .cm-header-6 {
// // font-size: 1em;
// // }
// // .cm-header-1, .cm-header-2, .cm-header-3, .cm-header-4, .cm-header-5, .cm-header-6 {
// // line-height: 1.5em;
// // }
// // .cm-search-marker {
// // background: ${theme.searchMarkerBackgroundColor};
// // color: ${theme.searchMarkerColor} !important;
// // }
// // .cm-search-marker-selected {
// // background: ${theme.selectedColor2};
// // color: ${theme.color2} !important;
// // }
// // .cm-search-marker-scrollbar {
// // background: ${theme.searchMarkerBackgroundColor};
// // -moz-box-sizing: border-box;
// // box-sizing: border-box;
// // opacity: .5;
// // }
// // /* We need to use important to override theme specific values */
// // .cm-error {
// // color: inherit !important;
// // background-color: inherit !important;
// // border-bottom: 1px dotted #dc322f;
// // }
// // /* The default dark theme colors don't have enough contrast with the background */
// // .cm-s-nord span.cm-comment {
// // color: #9aa4b6 !important;
// // }
// // .cm-s-dracula span.cm-comment {
// // color: #a1abc9 !important;
// // }
// // .cm-s-monokai span.cm-comment {
// // color: #908b74 !important;
// // }
// // .cm-s-material-darker span.cm-comment {
// // color: #878787 !important;
// // }
// // .cm-s-solarized.cm-s-dark span.cm-comment {
// // color: #8ba1a7 !important;
// // }
// // /* MOBILE SPECIFIC */
// // .CodeMirror .cm-scroller,
// // .CodeMirror .cm-line {
// // font-family: ${fontFamily};
// // caret-color: ${caretColor};
// // }
// // ${selectionColorCss}
// // `);
// // }, [themeId]);
// return css;
// }
function useHtml(css: string): string {
const [html, setHtml] = useState('');
useEffect(() => {
setHtml(
`
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<style>
.cm-editor {
height: 100%;
}
${css}
</style>
</head>
<body style="margin:0; height:100vh; width:100vh; width:100vw; min-width:100vw; box-sizing: border-box; padding: 10px;">
<div class="CodeMirror" style="height:100%;" autocapitalize="on"></div>
</body>
</html>
`
);
}, [css]);
return html;
}
function editorTheme(themeId: number) {
return {
...themeStyle(themeId),
fontSize: 15,
fontFamily: fontFamilyFromSettings(),
};
}
function NoteEditor(props: Props, ref: any) {
const [source, setSource] = useState(undefined);
const webviewRef = useRef(null);
const injectedJavaScript = `
function postMessage(name, data) {
window.ReactNativeWebView.postMessage(JSON.stringify({
data,
name,
}));
}
function logMessage(...msg) {
postMessage('onLog', { value: msg });
}
// This variable is not used within this script
// but is called using "injectJavaScript" from
// the wrapper component.
let cm = null;
try {
${shim.injectedJs('codeMirrorBundle')};
const parentElement = document.getElementsByClassName('CodeMirror')[0];
const theme = ${JSON.stringify(editorTheme(props.themeId))};
const initialText = ${JSON.stringify(props.initialText)};
cm = codeMirrorBundle.initCodeMirror(parentElement, initialText, theme);
} catch (e) {
window.ReactNativeWebView.postMessage("error:" + e.message + ": " + JSON.stringify(e))
} finally {
true;
}
`;
// const css = useCss(props.themeId);
const html = useHtml('');
useImperativeHandle(ref, () => {
return {
undo: function() {
webviewRef.current.injectJavaScript('cm.undo(); true;');
},
redo: function() {
webviewRef.current.injectJavaScript('cm.redo(); true;');
},
};
});
useEffect(() => {
let cancelled = false;
async function createHtmlFile() {
const tempFile = `${Setting.value('resourceDir')}/NoteEditor.html`;
await shim.fsDriver().writeFile(tempFile, html, 'utf8');
if (cancelled) return;
setSource({
uri: `file://${tempFile}?r=${Math.round(Math.random() * 100000000)}`,
baseUrl: `file://${Setting.value('resourceDir')}/`,
});
}
void createHtmlFile();
return () => {
cancelled = true;
};
}, [html]);
const onMessage = useCallback((event: any) => {
const data = event.nativeEvent.data;
if (data.indexOf('error:') === 0) {
console.error('CodeMirror:', data);
return;
}
const msg = JSON.parse(data);
const handlers: Record<string, Function> = {
onLog: (event: any) => {
console.info('CodeMirror:', ...event.value);
},
onChange: (event: ChangeEvent) => {
props.onChange(event);
},
onUndoRedoDepthChange: (event: UndoRedoDepthChangeEvent) => {
console.info('onUndoRedoDepthChange', event);
props.onUndoRedoDepthChange(event);
},
};
if (handlers[msg.name]) {
handlers[msg.name](msg.data);
} else {
console.info('Unsupported CodeMirror message:', msg);
}
}, [props.onChange]);
const onError = useCallback(() => {
console.error('NoteEditor: webview error');
});
// - `setSupportMultipleWindows` must be `true` for security reasons:
// https://github.com/react-native-webview/react-native-webview/releases/tag/v11.0.0
return <WebView
style={props.style}
ref={webviewRef}
useWebKit={true}
source={source}
setSupportMultipleWindows={true}
allowingReadAccessToURL={`file://${Setting.value('resourceDir')}`}
originWhitelist={['file://*', './*', 'http://*', 'https://*']}
allowFileAccess={true}
injectedJavaScript={injectedJavaScript}
onMessage={onMessage}
onError={onError}
/>;
}
export default forwardRef(NoteEditor);