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First of all: I am not exactly shure if this belongs into -user if it
should be put into the dev mailing list please tell me to do so
Today I ran some experiments on collaborative work Inkscape.
I put a file in a simple Hg-repository, created two branches, made
some changes to each of them and afterwards tried to merge them back
together.
while doing so I ran into 3 Problems:
The first one can't be changed by Inkscape: when you add objects to
the same layer in both branches you need to tell the diff tool to
insert them after each others so no big deal
The second one is that Inkscape saves the zoom and view position;
while its a bit annoying and i don’t relay see the advantage of saving
those its easy to resolve.
The third one is the reason for this mail: the svg format was designed
not to waste too much bandwidth for path definitions
(http://www.w3.org/TR/SVG/paths.html#PathDataGeneralInformation) so it
was allowed to put skip some whitespaces, have relative and absolute
formats and so on. While its not necessary to use it Inkscape actually
uses some of those optimizations for size. That is where it gets
problematic:
No line based diff algorithm will ever be able to understand
d="M 94.560583,882.94114 202.33942,447.30755 149.72092,186.54185 C
322.59461,172.3981 497.26518,91.769646 666.84911,199.34693 l
44.50099,59.86379 6.19919,124.61 -138.89214,182.52301
- -292.02038,376.68278 z"
it would be way better if Inkscape would save all the commands in
their own line with the correct command in front so you can put other
lines in between without breaking everything:
d="M94.560583,882.94114
M202.33942,447.30755
M149.72092,186.54185
C322.59461,172.3981
C497.26518,91.769646
C666.84911,199.34693
l44.50099,59.86379
l6.19919,124.61
l-138.89214,182.52301
l-292.02038,376.68278
z"
would allow adding a point to the line by just adding a line without
creating a huge diff.
Additionally it would be good to never use relative coordinates (l) as
changing one point would change two lines otherwise
Please note that this suggestion is for the so-called Inkscape-SVG
only (as that is the one people will use to work ), it should
obviously be optimized as much as possible in the plain svg format.
- --
Yannik Völker
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