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joplin/packages/app-mobile/components/NoteEditor/CodeMirror/CodeMirror.ts

78 lines
2.7 KiB
TypeScript

/* eslint-disable import/prefer-default-export */
// This contains the CodeMirror instance, which needs to be built into a bundle
// using `yarn buildInjectedJs`. This bundle is then loaded from
// NoteEditor.tsx into the webview.
//
// In general, since this file is harder to debug due to the intermediate built
// step, it's better to keep it as light as possible - it should just be a light
// wrapper to access CodeMirror functionalities. Anything else should be done
// from NoteEditor.tsx.
import { EditorSettings } from '@joplin/editor/types';
import createEditor from '@joplin/editor/CodeMirror/createEditor';
import CodeMirrorControl from '@joplin/editor/CodeMirror/CodeMirrorControl';
import WebViewToRNMessenger from '../../../utils/ipc/WebViewToRNMessenger';
import { WebViewToEditorApi } from '../types';
import { focus } from '@joplin/lib/utils/focusHandler';
export const initCodeMirror = (
parentElement: HTMLElement,
initialText: string,
settings: EditorSettings,
): CodeMirrorControl => {
const messenger = new WebViewToRNMessenger<CodeMirrorControl, WebViewToEditorApi>('editor', null);
const control = createEditor(parentElement, {
initialText,
settings,
onPasteFile: async (data) => {
const reader = new FileReader();
return new Promise<void>((resolve, reject) => {
reader.onload = async () => {
const dataUrl = reader.result as string;
const base64 = dataUrl.replace(/^data:.*;base64,/, '');
await messenger.remoteApi.onPasteFile(data.type, base64);
resolve();
};
reader.onerror = () => reject(new Error('Failed to load file.'));
reader.readAsDataURL(data);
});
},
onLogMessage: message => {
void messenger.remoteApi.logMessage(message);
},
onEvent: (event): void => {
void messenger.remoteApi.onEditorEvent(event);
},
});
// Works around https://github.com/laurent22/joplin/issues/10047 by handling
// the text/uri-list MIME type when pasting, rather than sending the paste event
// to CodeMirror.
//
// TODO: Remove this workaround when the issue has been fixed upstream.
control.on('paste', (_editor, event: ClipboardEvent) => {
const clipboardData = event.clipboardData;
if (clipboardData.types.length === 1 && clipboardData.types[0] === 'text/uri-list') {
event.preventDefault();
control.insertText(clipboardData.getData('text/uri-list'));
}
});
// Note: Just adding an onclick listener seems sufficient to focus the editor when its background
// is tapped.
parentElement.addEventListener('click', (event) => {
const activeElement = document.querySelector(':focus');
if (!parentElement.contains(activeElement) && event.target === parentElement) {
focus('initial editor focus', control);
}
});
messenger.setLocalInterface(control);
return control;
};