cognitivegears
commented
1 year ago From what I've been able to figure out, it looks like:
- 'T' should be treated like 'A' (cursor up)
- 'S' should be treated like 'B' (cursor down)
- 'E' works like one or more line feeds going to the start of the row and down # number of lines.
- 'F' is like a negative 'E' - going to the start of the line and up # of lines
- 'G' moves # spaces from the left - 1. (I'm not positive on my interpretation of this one.)
- 'K' doesn't affect cursor positioning, we can ignore it
- 't' doesn't affect cursor positioning, we can ignore it.
- '@' is described in ANSI, but isn't in Pablo Draw. It inserts a space at the cursor position, but it doesn't say whether it moves the cursor in the process. Not sure if it's used by any editors either, so probably going to skip it unless you disagree.
Another set of characters that aren't CSI but we might need to deal with:
- TAB character. I'm not sure how common it is in .ANS files, but theoretically I think it should move over the the next tab stop - that is, move right 8 - (this.column MOD 8) spaces. It is described in BANSI
- ^H destructive backspace. It moves the cursor, and is described in BANSI
- ^L Clear screen (I've also seen this as page break), it homes cursor to 1,1 and is also described in BANSI
Yet another set that are not CSI sequences are ESC D and ESC M which work like CSI S and CSI T
Just wanted to see if you could confirm any of these before I put in code to handle them. Since I don't have any ANS files that uses them, I'll need to make samples to try to confirm.
Is your feature request related to a problem? Please describe. This was related it issue #494. For that I added additional sequences, including t ,E, F, G, S, and T that are supported by PabloDraw. However, I just added the codes to prevent breakage, not implemented additional functionality.
Describe the solution you'd like We should investigate these, as well as others (such as K) to see what implementation is needed.
Describe alternatives you've considered n/a
Additional context Take a look at the code here: (https://github.com/cwensley/pablodraw/blob/c1df6febcc7fb6b2d9b7876fb783ff224e0e87f5/Source/Pablo/Formats/Character/Types/Ansi.load.cs)