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import { Extension } from '@tiptap/core';
import { Plugin, PluginKey } from 'prosemirror-state';
import { __ } from '~/locale';
import { VARIANT_DANGER } from '~/flash';
import createMarkdownDeserializer from '../services/markdown_deserializer';
import {
ALERT_EVENT,
LOADING_CONTENT_EVENT,
LOADING_SUCCESS_EVENT,
LOADING_ERROR_EVENT,
EXTENSION_PRIORITY_HIGHEST,
} from '../constants';
const TEXT_FORMAT = 'text/plain';
const HTML_FORMAT = 'text/html';
const VS_CODE_FORMAT = 'vscode-editor-data';
export default Extension.create({
name: 'pasteMarkdown',
priority: EXTENSION_PRIORITY_HIGHEST,
addOptions() {
return {
renderMarkdown: null,
};
},
addCommands() {
return {
pasteMarkdown: (markdown) => () => {
const { editor, options } = this;
const { renderMarkdown, eventHub } = options;
const deserializer = createMarkdownDeserializer({ render: renderMarkdown });
eventHub.$emit(LOADING_CONTENT_EVENT);
deserializer
.deserialize({ schema: editor.schema, content: markdown })
.then(({ document }) => {
if (!document) {
return;
}
const { state, view } = editor;
const { tr, selection } = state;
tr.replaceWith(selection.from - 1, selection.to, document.content);
view.dispatch(tr);
eventHub.$emit(LOADING_SUCCESS_EVENT);
})
.catch(() => {
eventHub.$emit(ALERT_EVENT, {
message: __('An error occurred while pasting text in the editor. Please try again.'),
variant: VARIANT_DANGER,
});
eventHub.$emit(LOADING_ERROR_EVENT);
});
return true;
},
};
},
addProseMirrorPlugins() {
return [
new Plugin({
key: new PluginKey('pasteMarkdown'),
props: {
handlePaste: (_, event) => {
const { clipboardData } = event;
const content = clipboardData.getData(TEXT_FORMAT);
const hasHTML = clipboardData.types.some((type) => type === HTML_FORMAT);
const hasVsCode = clipboardData.types.some((type) => type === VS_CODE_FORMAT);
const vsCodeMeta = hasVsCode ? JSON.parse(clipboardData.getData(VS_CODE_FORMAT)) : {};
const language = vsCodeMeta.mode;
if (!content || (hasHTML && !hasVsCode) || (hasVsCode && language !== 'markdown')) {
return false;
}
this.editor.commands.pasteMarkdown(content);
return true;
},
},
}),
];
},
});
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