Method updatePreview

src/rmarkdown/preview.ts:288–309

(preview?: RMarkdownPreview)

    }

    public async updatePreview(preview?: RMarkdownPreview): Promise<void> {
        const toUpdate = preview ?? this.activePreview.preview;
        const previewUri = toUpdate ? this.previewStore.getFilePath(toUpdate) : undefined;
        toUpdate?.cp?.dispose();

        if (toUpdate && previewUri) {
            toUpdate.isRendering = true;
            const childProcess: DisposableProcess | void = await this.previewDocument(previewUri, toUpdate.title).catch(() => {
                void vscode.window.showErrorMessage('There was an error in knitting the document. Please check the R Markdown output stream.');
                this.rMarkdownOutput.show(true);
                this.previewStore.delete(previewUri);
            });

            if (childProcess) {
                toUpdate.cp = childProcess;
            }

            this.refreshPanel(toUpdate);
            toUpdate.isRendering = false;
        }

    }

    private async previewDocument(filePath: string, fileName?: string, viewer?: vscode.ViewColumn, currentViewColumn?: vscode.ViewColumn): Promise<DisposableProcess | undefined> {
        const knitWorkingDir = this.getKnitDir(knitDir, filePath);