"I didn't get the feeling that she was gleeful at the prospect. "

Funny, most of the comments I have read suggest she is ecstatic that she can call an election and finally gain some legitimacy, which is what the election is really about. 

Before she called the election, I had to suffered endless lectures on why the Tory majority was already sufficient to hold the vote on Article 50, and that the legislation for semi-fixed dates prevented her from calling an election to earn herself a genuine mandate until the end of the parliamentary term. Suddenly, she realizes just how useless Corbyn is and off to the polls they go...