gristlabs_grist-core/app/client/components/CodeEditorPanel.ts

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import {GristDoc} from 'app/client/components/GristDoc';
import {reportError} from 'app/client/models/errors';
import {DisposableWithEvents} from 'app/common/DisposableWithEvents';
import {dom, Observable} from 'grainjs';
// Rather than require the whole of highlight.js, require just the core with the one language we
// need, to keep our bundle smaller and the build faster.
const hljs = require('highlight.js/lib/highlight');
hljs.registerLanguage('python', require('highlight.js/lib/languages/python'));
export class CodeEditorPanel extends DisposableWithEvents {
private _schema = Observable.create(this, '');
private _denied = Observable.create(this, false);
constructor(private _gristDoc: GristDoc) {
super();
this.listenTo(_gristDoc, 'schemaUpdateAction', this._onSchemaAction.bind(this));
this._onSchemaAction().catch(reportError); // Fetch the schema to initialize
}
public buildDom() {
// The tabIndex enables the element to gain focus, and the .clipboard class prevents the
// Clipboard module from re-grabbing it. This is a quick fix for the issue where clipboard
// interferes with text selection. TODO it should be possible for the Clipboard to never
// interfere with text selection even for un-focusable elements.
return dom('div.g-code-panel.clipboard',
{tabIndex: "-1"},
dom.maybe(this._denied, () => dom('div.g-code-panel-denied',
dom('h2', dom.text('Access denied')),
dom('div', dom.text('Code View is available only when you have full document access.')),
)),
dom.maybe(this._schema, (schema) => {
// The reason to scope and rebuild instead of using `kd.text(schema)` is because
// hljs.highlightBlock(elem) replaces `elem` with a whole new dom tree.
const elem = dom('code.g-code-viewer',
dom.text(schema),
dom.hide(true)
);
setTimeout(() => {
hljs.highlightBlock(elem);
dom.showElem(elem, true);
});
return elem;
})
);
}
private async _onSchemaAction() {
try {
const schema = await this._gristDoc.docComm.fetchTableSchema();
if (!this.isDisposed()) {
this._schema.set(schema);
this._denied.set(false);
}
} catch (err) {
if (!String(err).match(/Cannot view code/)) {
throw err;
}
if (!this.isDisposed()) {
this._schema.set('');
this._denied.set(true);
}
}
}
}