#1165 Tab draw mode (files attached)

[Justin Dailey]

Some editors allow tabs to be draw different from just the regular "arrows". This patch addes 2 new API messages that get/set the tab draw mode. There is currently 2 ways of drawing them. The "long arrow" which is the normal/default way, and as a "strike out" which is a single horizontal line (like the arrow but with no arrow head). This is how Sublime text does and maybe others. Someone could also add a new mode like "short arrows" like what MSVC uses.

The default (long arrow):

And strike out:

This patch also does a slight bit of renaming, for example "DrawTabArrowFn" is now "DrawTabFn" since tabs don't technically have to be arrows.

Feedback and/or renaming suggestions welcome.

[Neil Hodgson]

Changing DrawTabArrowFn to DrawTabFn (and related changes) is an unnecessary incompatibility with existing platform layers. Arrows don't have to have heads.

[Justin Dailey]

Changing DrawTabArrowFn to DrawTabFn (and related changes) is an unnecessary incompatibility with existing platform layers.

Ah yes I see that now.

Is this patch something you would accept if I reverted the naming changes?

[Justin Dailey]

Updated files if you are interested.

[Neil Hodgson]

Committed as [d24fee].