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And FINALLY implemented that function :D

This commit is contained in:
Pietro Gagliardi 2016-12-20 16:16:52 -05:00
parent 28ca02673b
commit ecc7b70a6b
1 changed files with 39 additions and 23 deletions
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62
common/exp_attrdll.c
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@ -340,30 +340,22 @@ void attrlistInsertCharactersUnattributed(struct attrlist *alist, size_t start,
// The attributes are those of character start - 1.
// If start == 0, the attributes are those of character 0.
void attrlistInsertCharactersExtendingAttributes(struct attrlist *alist, size_t start, size_t count)
{
size_t from;
/*
This is an obtuse function. Here's some diagrams to help.
Given the input string
abcdefghi (positions: 012345678 9)
and attribute set
red start 0 end 3
bold start 2 end 6
underline start 5 end 8
or visually:
012345678 9
rrr------
--bbbb---
-----uuu-
If we insert qwe to result in positions 0123456789AB C:
from = start - 1;
if (start == 0)
from = 0;
/////////
for every attribute
if TODO
adjust start by count
adjust end by count
else if TODO
adjust end by count
/////////
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
@ -388,6 +380,7 @@ 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)
result:
0 1 2 3 4 5 6 7 8 9
red E E E e n n n n n n
@ -397,7 +390,30 @@ N = none
E = end only
S = start and end
uppercase = in original range, lowercase = not
which results in our algorithm:
for each attribute
if start < insertion point
move start up
else if start == insertion point
if start != 0
move start up
if end <= insertion point
move end up
*/
// TODO does this ensure the list remains sorted?
void attrlistInsertCharactersExtendingAttributes(struct attrlist *alist, size_t start, size_t count)
{
struct attr *a;
for (a = alist->first; a != NULL; a = a->next) {
if (a->start < start)
a->start += count;
else if (a->start == start && start != 0)
a->start += count;
if (a->end <= start)
a->end += count;
}
}
void attrlistRemoveAttribute(struct attrlist *alist, uiAttribute type, size_t start, size_t end)