Completion with cursor inside argument

[tkruse]

HI,

There are multiple alternatives to consider when completing an Argument with the cursor not being at the end of the line/argument.

Consider a command load that takes a Filename, assume there is a file project/LICENSE, the | indicates the cursor position:

load project/LICE|XXX
# possible situations after hitting tab
load project/LICENSE |XXX
load project/LICENSE

When the suffix matches the candidate, there are these possibilities:

load project/LICE|NS
# possible situations after hitting tab
load project/LICENSE |NS
load project/LICENSE |

Different completion frameworks do this differently (compare bash, ipython, Eclipse, IntelliJ)

I believe both strategies can be considered useful, so it would be nice if JLine supported both. I might have time to work on a PR, but first I want to check whether this is considered a good idea.

[gnodet]

This looks like the precise role of the CompletionHandler.
I don't have any problem adding a flag to the existing handler or defining a new one.