Question

How to write a function that can cut a string with HTML tags to an N-length string without breaking HTML tags while doing it.

The returned string doesn’t need to be exactly N characters long. It can cut it before or after tag that is on the edge of N-long string.

Visit <a href="www.htz.hr">Croatia</a> this summer.

CutIt(9) should return

Visit

or

Visit <a href="www.htz.hr">Croatia</a>

Answer 1

I solved the problem so here is the code in c#;

static string CutIt(string s, int limit)
{
    if (s.Length < limit) return s;

    int okIndex = 0;
    bool inClosingTag = false;
    int numOpenTags = 0;

    for (int i = 0; i < limit; i++)
    {
        if (s[i]=='<')
        {
            if (s[i+1]=='/')
            {
                inClosingTag = true;    
            }
            else
            {
                numOpenTags++;   
            }
        }
        if (s[i]=='>')
        {
            if (s[i-1]=='/')
            {
                numOpenTags--;
            }
            if (inClosingTag)
            {
                numOpenTags--;
            }
        }

        if (numOpenTags == 0) okIndex = i;

    }
    return s.Substring(0, okIndex + 1);
}