What is the process for accessing a read-only markdown preview in a vscode extension?

I'm currently working on developing a custom Visual Studio Code extension. I have implemented a feature where clicking on a button should open a markdown preview with specific content. The code snippet I am using for this functionality is as follows:

let moreInfo = vscode.commands.registerCommand('moreInformation', () => {
        const uri = vscode.Uri.file(context.asAbsolutePath('./resources/info.md'));
        vscode.commands.executeCommand("markdown.showPreview", uri);
    });

Although this code successfully opens the markdown preview, I noticed that double-clicking on the preview allows users to access and modify the source markdown code. Is there a way to make the markdown preview open in read-only mode? Any insights would be greatly appreciated. Thank you.

typescriptvisual-studio-codemarkdownvscode-extensionsreadonly

Answer №1

Unfortunately, there doesn't seem to be a perfect solution for this problem. One option is to adjust the setting that controls opening the associated file when double-clicking the markdown preview:

Markdown > Preview: Double Click To Switch To Editor

By default, this setting is enabled, so disabling it in your extension may not be ideal for your users.

Another possibility is to detect when the markdown raw editor is opened and set it to read-only:

vscode.window.onDidChangeActiveTextEditor(async ed => {
    // if (ed.document.fileName === 'the markdown file to lock') {then do below}
    await vscode.commands.executeCommand('workbench.action.files.setActiveEditorReadonlyInSession');
});

While this method does work by opening the raw markdown file as read-only, users could still override this by turning off read-only mode on that specific file.

At the moment, it seems there isn't a perfect solution available for your issue.

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