fonts - Which Unicode characters can be typed using the keyboard? -

i had trouble figuring out title question, know sounds little stupid.

i'm working on webfont generator. have on 1,000 svgs (and growing), and, use of fontforge scripts, plan on assigning each 1 of files character position.

this red x rectangle next blue 1 down here mean "character position":

the problem:

each 1 of positions have code correspondent. print directly, don't. know fact control characters from table here don't print. there other characters don't print either, such soft-hyphen (u+00ad). 1 sadly discovered accident.

i don't want allow end-users pick whatever characters positions want, because then, icons filling positions won't show in browser. looked on , on over unicode website see if have list or something, there's nothing helpful there.

so there way can know sure character positions safe use icons, or ones aren't?

i can guess @ intentions, i'll guess you're looking private use areas of unicode. these range of code points have no assigned meaning. can use these code points assign own icons, symbols or meanings. it's between , user of font these code points mean , can use them freely.

you should never overload meaning of code points. if code point specified "%", character should ever in code point "%". doesn't matter how rare or common use of code point is, because if there's ever collision situation hard resolve. private use areas exist prevent collisions of sort entirely.