MOAITextLabel:getTextBounds corner cases

[DanielSWolf]

There are multiple corner cases where MOAITextLabel:getTextBounds doesn't work as expected. I've tested those with the override that takes a start and an end index, but they should behave identically for the simple version.

• If the string has trailing spaces, the returned rectangle doesn't include those spaces but ends at the last visible glyph.
• If the string has leading spaces, no valid rectangle is returned at all.
• If the start index is one greater than the end index, this should describe a zero-length interval. Accordingly, I'd expect a zero-width rectangle that represents a vertical line between two characters.

These cases may seem contrived, but they all come into play as soon as you try to display a text cursor at a specific position within a string. All but the last one (for which I found a workaround) can be observed as unexpected behavior in the sample samples/input-text (pull request #1060).

[seclorum]

• If the string has trailing spaces, the returned rectangle doesn't include those spaces but ends at the last visible glyph./If the string has leading spaces, no valid rectangle is returned at all.

IMHO, this is a bug more than a corner case, as spaces should have their own glyph, and thus geometry, indeed.

[mohaalak]

I encounter this bug when I was creating TextLable in Hannape .you can not have a text label that it's text is empty or just spaces.