The concept of uninitialized cells in wezterm is not the same as that on
VT520 or that on xterm, so treat them as spaces, at least when asking
for the checksum of a single cell, which is what esctest does.
Neither of these understand image protocols, and both are
an additional processing layer between the application and
wezterm.
This commit detects and wraps OSC sequences in tmux's passthru
sequence so that the data is passed on to wezterm rather than
elided from the data stream.
For image protocols in both tmux and conpty, work a little
smarter and explicitly move the cursor position to the same
location that wezterm would move it to. That prevents the
display from being as mangled by tmux/conpty due to a diverging
understanding of the cursor position.
The logic isn't perfect, and can result in the x-coordinate
being incorrect, and this won't work with the new --position
argument either in its current state, without adding a lot
of complexity to deal with scrolling and relative and absolute
positioning handling.
To facilitate that, a new termwiz Terminal trait method has
been added to probe the terminal name, version, cell and pixel
dimensions. It's not pretty.
refs: https://github.com/wez/wezterm/issues/3624
refs: https://github.com/wez/wezterm/issues/3716
Given a sequence like this, where the `ESC [ K` sequence is
emitted at the last column when wrap_next=true:
\u001b[47;30m 17:24:50 \u001b[0m\u001b[K
rather than treating the column as out of bounds, we'd clear the
final cell.
refs: #3548
The server-side ownership of the palette is a stumbling block for
many users, so let's fix it.
This commit allows the client to pass its configured palette to
the server when it connects, and when the config is changed.
That palette takes precedence over the palette from the server config.
However, if the remote application uses any escape sequences that
redefine the color palette, the color palette that was active at
that point in time is forked and use as the basis, and will remain
the active palette until the palette is reset via escape sequences.
refs: https://github.com/wez/wezterm/issues/2686
refs: https://github.com/wez/wezterm/issues/3397
* Translate from File to EncodedFile as needed
* Adopt blob leases in the mux server
* Fix an issue where the first image sent by the mux server would
be replaced on the client by its background image, if configured.
Removed the ImageData::id field to resolve this: you should use
the hash field instead to identify and disambiguate images.
Bumped the termwiz API version because this is conceptually
a breaking change to the API
refs: https://github.com/wez/wezterm/issues/3343
Really, this is adjusting the logical line breaking behavior, or the
lack thereof.
The situation is this: conpty can decided to reinterpret and flush
large sections of its buffer as a continuous stream of unbroken
characters with no breaks when it repaints the full screen.
When we receive such an update, we see it as one long logical line,
and when we subsequently select multiple lines we can run into the
maximum logical line length and insert invalid synthetic line breaks
into the data that we send to the clipboard.
This commit adjusts the wrapping logic at the time that we receive
the text so that we don't tag the line as a logical line continuation
if:
* The alt screen is active. Full screen apps will re-render on resize
anyway, and we don't reflow long lines on resize either for the same
reasons
* If we are talking to ConPTY:
* If the last character in the line is not alphanumeric or
punctuation (in other words: it doesn't look plausibly like
text that should be a line continuation).
refs: #3278
refs: #3177
- Removes closures and function calls for types that implement default:
```rust
// Change
let _my_str = get_str().unwrap_or(String::new);
// To
let _my_str = get_str().unwrap_or_default();
```
- Uses the `.cloned()/.copied()` methods where possible
- Use function pointer instead of simple closure
May improve performace, as closures generate more code, and this might
unlock some inlining opportunities.
- Use `find` instead of `position(..).next()`
- Use `any` instead of `position(..).next().is_some()/.is_none()`
- Use `first/next` instead of `get(0)/nth(0)`
- Prefer `for` loops over `while let` loops on iterators
May improve performance.
Adopt the new blob lease layer to storing and referencing
image files.
This reduces the number of open files needed when
images are being displayed in the terminal.
refs: https://github.com/wez/wezterm/issues/3263
Input data:
\e_Ga=T,f=32,s=10,v=22,c=1,r=1,m=1\e\\e_Gm=1;/xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T//P=\e\\e_Gm=1;/xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T////E////xP///8T//P=\e\\e_Gm=0\e\
There were two issues in handling this:
* We expected there to be `;payload` in the first transmission packet,
but there wasn't one, so we ignored it as ill-formed.
* The standard base64 decoder in the rust ecosystem is super strict
and rejects the "sloppy" python base64 encoder output that isn't
strictly conformant with the RFC. We need to jump through some
hoops to get it to relax and accept the input.
refs: https://github.com/wez/wezterm/issues/2716
Continuing from the previous commit, this shifts:
* In-memory data -> temporary file
* Image decoding -> background thread
The background thread asynchronously decodes frames and
sends them to the render thread via a bounded channel.
While decoding frames, it writes them, uncompressed, to
a scratch file so that when the animation loops, it is
a very cheap operation to rewind and pull that data
from the file, without having to burn CPU to re-decode
the data from the start.
Memory usage is bounded to 4 uncompressed frames while
decoding, then 3 uncompressed frames (triple buffered)
while looping over the rest.
However, disk usage is N uncompressed frames.
refs: https://github.com/wez/wezterm/issues/3263
This makes decoding animation frames a lazy operation, but it
comes at the cost of needing to re-decode the image from scratch
when it loops, because the image crate doesn't provide a way
to rewind its frame iterator.
That initial decode can have a significant time cost; a small
webp file consistently takes 150ms to decode, which is too
much to do inline in the render thread.
Next steps will be to move that cost off the render thread.
I spent a few hours in heap profilers. What I found was:
* Inefficient use of heap when building up runs of
`Action::Print(char)`.
-> Solve by adding `Action::PrintString(String)`
and accumulating utf8 bytes rather than u32 codepoints.
* Inefficient use of heap when building Quad buffers: the default
exponential growth of `Vec` tended to waste 40%-75% of the allocated
capacity, and since we could keep ~1024 of these in cache, there's
a lot of potential for waste.
-> Solve by bounding the growth to 64 at a time. This has similar
characteristics to exponential growth at the default 80x24 terminal
size. May need to add a config option for this step size for users
with very large terminals.
* Lazy eviction from the LFU caches. The underlying cache advisor is
somewhat probabilistic and has a minimum cache size of 256, making
it difficult to maintain low heap utilization.
-> Solve by replacing it with a very simple LFU algorithm. It doesn't
seem to hurt much at the default terminal size with the default
cache sizes. If we make the cache sizes smaller, its overhead is
reduced.
Some further experimentation is needed to adjust defaults, but this
should help reduce heap usage.
refs: https://github.com/wez/wezterm/issues/2626
