tree ea54424e97e879dd5db20ec549f1b8346844cf73
parent 46f041b7340cba58356e7782bf3d7377ae278530
author James Bottomley <JBottomley@Parallels.com> 1393861952 -0800
committer James Bottomley <JBottomley@Parallels.com> 1400407092 +0900

impress.js: make past, present and future classes work with non-linear steps

Currently the class changes in the impress:stepenter and impress:stepleave
events assume you're going linearly through the presentation.  This means that
they add the wrong classes if you go back by one (or even just reload the
presentation).  This shows up starkly if you use the class.past|future css
modifiers.  Fix this by detecting how the step is being done and adjusting
accordingly in impress:stepenter.

Also introduce data-duration parameter to control the delay timing of steps.

Signed-off-by: James Bottomley <JBottomley@Parallels.com>