Inconsistent behavior in xaxis labels when using ellipses.

[jasdeep26]

Expected behaviour

Should consistently show first n letters of each category if space permits.

Actual behaviour

Skipping the first letter in some of the categories (specially with word length is a multiple of 5) even if the space permits.

Live demo with steps to reproduce

Minimalist example
http://jsfiddle.net/reckutq8/

Affected browser(s)

All browsers

[jasdeep26]

Fix:
In Highcharts v5.0.6, change condition in line number 4343
from : if (wordStr === '' || (!tooLong && cursor < 0.5))
to : if ((wordStr === '' || !tooLong) && cursor <= 0.5) {

Root Cause:
Since we are using Math.ceil on the binary search cursor, it goes from 5, 2.5, 1.25, 0.625
which makes the actual word length go from 5, 2, 0.
Now since word string becomes empty, it returns empty word.
But the fact is that we never checked for word length 1.
So in the fix provided, we will always continue to check as long as the cursor value is less than or equal to 0.5 implying that we have not yet checked for word length 1 yet.

Example with updated script.
http://jsfiddle.net/reckutq8/2/