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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` For the **reverse wrap** (non-extended) behavior, moe the cursor to the left `n`
cells while respecting the aforementioned leftmost boundary. Upon reaching the cells while respecting the aforementioned leftmost boundary. Upon reaching the
leftmost boundary, if `n > 0` then move the cursor to the [right margin](#TODO) leftmost boundary, if `n > 0` and the previous line was wrapped, then move the
of the line above the cursor. If the cursor is already on the cursor to the [right margin](#TODO) of the line above the cursor. If the previous
[top margin](#TODO), do not move the cursor up and the sequence is complete. 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. This wrapping mode does not wrap the cursor row back to the bottom margin.
## Validation ## Validation
@ -79,4 +81,23 @@ printf "B"
|Bc________| |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 ### TODO: Reverse Wrap, Scroll Region Validations