Resolves: fdo#68347 fix word count with recorded changes

also see fdo#46757

a) We need to ignore redline-deleted text, but count redline-added text
b) each block of text is denoted by its end position in the model
and where that maps to in the view so a hidden portion
should record its end point not its starting point, and a non-hidden
deleted portion should always record its end point
c) when mapping a model position to the view we take the offset of
the model pos arg from the block end and use that to offset the
mapped block-end view pos to get the final view pos. But for
hidden portions that won't make a whole lot of sense, and
end up offsetting into prior portions, so map all positions within a
hidden portion to the same block-end view pos

add regression tests for these cases

Change-Id: I45c76bba47fd430bc3bccb5f919502660d415d9e

0 files changed, 0 insertions, 0 deletions