What is the simplest implementation of Markdown for a Cocoa application?

Question

I\'m writing a Cocoa application in Objective-C, and I would like to be able to incorporate Markdown. The user will enter text in Markdown syntax, click an \"export\" button

Answer 1

I just used the Sundown implementation which includes SmartyPants support, in an iPad app with great success. Took about 15 minutes to build a test app.

Assume you have a UITextView *textView (which you setDelegate:self) and also a UIWebView *webView in which to display the results:

- (void) textViewDidEndEditing:(UITextView *)textView
{
    NSString *rawMarkdown = [textView text];
    const char * prose = [rawMarkdown UTF8String];  
    struct buf *ib, *ob;       

    int length = [rawMarkdown lengthOfBytesUsingEncoding:NSUTF8StringEncoding] + 1;

    ib = bufnew(length);
    bufgrow(ib, length);
    memcpy(ib->data, prose, length);
    ib->size = length;

    ob = bufnew(64);

    struct sd_callbacks callbacks;
    struct html_renderopt options;
    struct sd_markdown *markdown;


    sdhtml_renderer(&callbacks, &options, 0);
    markdown = sd_markdown_new(0, 16, &callbacks, &options);

    sd_markdown_render(ob, ib->data, ib->size, markdown);
    sd_markdown_free(markdown);


    NSString *shinyNewHTML = [NSString stringWithUTF8String: ob->data];
    [webView loadHTMLString:shinyNewHTML baseURL:[[NSURL alloc] initWithString:@""]];

    bufrelease(ib);
    bufrelease(ob);
}