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website: update reverse wrap details and test

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This commit is contained in:
Mitchell Hashimoto
2023-10-06 08:09:09 -07:00
parent 8f1cc5fab3
commit 5221f99380
1 changed files with 24 additions and 3 deletions
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27
website/app/vt/cub/page.mdx
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@ -42,9 +42,11 @@ mode.
For the **reverse wrap** (non-extended) behavior, moe the cursor to the left `n`
cells while respecting the aforementioned leftmost boundary. Upon reaching the
leftmost boundary, if `n > 0` then move the cursor to the [right margin](#TODO)
of the line above the cursor. If the cursor is already on the
[top margin](#TODO), do not move the cursor up and the sequence is complete.
leftmost boundary, if `n > 0` and the previous line was wrapped, then move the
cursor to the [right margin](#TODO) of the line above the cursor. If the previous
line was not wrapped, the cursor left operation is complete even if there
is a remaining value of `n`. If the cursor
is already on the [top margin](#TODO), do not move the cursor up.
This wrapping mode does not wrap the cursor row back to the bottom margin.
## Validation
@ -79,4 +81,23 @@ printf "B"
|Bc________|
```
### CUB V-3: Reverse Wrap
```bash
cols=$(tput cols)
printf "\033[?7h" # enable wraparound
printf "\033[?45h" # enable reverse wrap
printf "\033[1;1H" # move to top-left
printf "\033[0J" # clear screen
printf "\033[${cols}G" # move to end of line
printf "AB" # write and wrap
printf "\033[D" # move back two
printf "X"
```
```
|_________Xc
|B_________|
```
### TODO: Reverse Wrap, Scroll Region Validations