Created attachment 180661 [details] [review]
Cut with fading the Bar title when it's longer than the decoration bar

With this patch, when an application title is longer than the decorator available space for title, the text is colored using a cairo linear pattern which is divided into two parts:
  * The first pixels - alpha_margin are colored with the defined opaque color
  * The pixels from alpha_margin until the string end are colored using
    a cairo pattern going from the opaque color to the transparent one.

The alpha_margin value allows to define how "slow" the fading should be and is actually fixed to 30, but it can be revised or maybe settable by themes.

You can see how a window with a long title looks when the patch is applied here:
 http://go.3v1n0.net/dMv6Eg