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Plotted out at a high level how insertion with attribute borrowing should work.

This commit is contained in:
Pietro Gagliardi 2016-12-20 14:24:26 -05:00
parent 643e2937c4
commit 4f1ba0df84
1 changed files with 48 additions and 2 deletions
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50
common/exp_attrdll.c
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@ -347,8 +347,54 @@ void attrlistInsertCharactersExtendingAttributes(struct attrlist *alist, size_t
from = start - 1;
if (start == 0)
from = 0;
TODO
/////////
if start == 0
for every attribute
if it doesn't start at 0
move start up by count
move end up by count
return
for every attribute
if the attribute ends at or after the insertion point
advance its end by count
continue
if the attribute starts at or after the insertion point
advance its start and end by count
continue
/////
abcdefghi (012345678 9)
red start 0 end 3
bold start 2 end 6
underline start 5 end 8
inserting qwe -> qweabcdefghi (0123456789AB C)
012345678 9
rrr------
--bbbb---
-----uuu-
before 0, 1, 2 (grow the red part, move everything else down)
red -> start 0 (no change) end 3+3=6
bold -> start 2+3=5 end 6+3=9
underline -> start 5+3=8 end 8+3=B
before 3 (grow red and bold, move underline down)
red -> start 0 (no change) end 3+3=6
bold -> start 2 (no change) end 6+3=9
underline -> start 5+3=8 end 8+3=B
before 4, 5 (keep red, grow bold, move underline down)
red -> start 0 (no change) end 3 (no change)
bold -> start 2 (no change) end 6+3=9
underline -> start 5+3=8 end 8+3=B
before 6 (keep red, grow bold and underline)
red -> start 0 (no change) end 3 (no change)
bold -> start 2 (no change) end 6+3=9
underline -> start 5 (no change) end 8+3=B
before 7, 8 (keep red and bold, grow underline)
red -> start 0 (no change) end 3 (no change)
bold -> start 2 (no change) end 6 (no change)
underline -> start 5 (no change) end 8+3=B
before 9 (keep all three)
red -> start 0 (no change) end 3 (no change)
bold -> start 2 (no change) end 6 (no change)
underline -> start 5 (no change) end 8 (no change)
}
void attrlistRemoveAttribute(struct attrlist *alist, uiAttribute type, size_t start, size_t end)