AE alignment semantics:
- leading white-space counts (i.e. "pushes" the line to the right
in left/center alignment mode)
- trailing white-space is ignored (does not push the line to the left
in center/right alignment mode)
Skottie currently always takes white-space into account. This yields
incorrect center/right alignment not just in the presence of explicit
trailing WS, but also due to residual WS from paragraph line breaks.
To fix, detect trailing WS for each committed line, and adjust glyph
positions to compensate.
Change-Id: Id8589cb30f743f21d77961c0eb4fa20a97e5f13c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/526457
Reviewed-by: Jorge Betancourt <jmbetancourt@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Florin Malita <fmalita@google.com>
de6af36e6e