Still not perfect; there's a window invalidation missing from
the mux somewhere on higher latency connections that gets
resolved just by moving the mouse :-/
We would leave a copy of the alt screen lines at the top of the
scrollback.
This commit ensures that those lines are marked dirty and that
the dirty bits are propagated to the client to invalidate its cache.
Use StableRowIndex to implement tracking the viewport in the gui layer.
This resolves an issue where a busy terminal would continue to scroll
through the scrollback when you were paging backwards and look weird.
There's still some cleanup though:
- This breaks the selection ui
- the cursor position is wrong when scrolling back
- shift-pageup/pagedown need to be processed in the gui layer
Refs: https://github.com/wez/wezterm/issues/106
Previously we would try to pass through the Backspace and Delete
code points without interference, but that behavior wasn't quite
right.
With this commit our behavior is now:
- At the window layer: Classify a `Backspace` key press as logically
`BS` and a `Delete` key press as logically `DEL` unless the
`swap_backspace_and_delete` is true (macOS is true by default), in
which case `Backspace` is mapped to `Delete` and vice versa.
- At the terminal input layer: A `Backspace` input from the Window sends
the `DEL` sequence to the pty as that matches the default `VERASE` stty
configuration. A `Delete` input from the Window emits `\033[3~`,
which matches up to the `TERMINFO` for `xterm-256color` which we
claim to be compatible with, and is our default `$TERM` value.
The net result of this is that `Backspace` will now start to emit `^?`
which should match folks stty verase. Heads up to @fanzeyi!
I've tested this only on a linux system so far and will follow up on
a macOS system a little later today.
Refs: https://github.com/wez/wezterm/issues/88
Refs: https://github.com/wez/wezterm/issues/63
@fanzeyi ran into part of this issue when using multiplexing;
tabs from a remote domain always used the default color scheme
rather than the local configuration file color scheme.
Another variation on this is that making changes to the `[colors]`
section of the config only impacts tabs created after the change
was loaded, rather than updating the running tabs.
The root of this was that each terminal was keeping its own
copy of the palette that was updated at creation time to reflect
the config file. Relatively recently I introduced a new trait
to allow the terminal state to reach out and obtain configuration
from another source.
This commit connects the terminal configuration layer to the
configuration file directly.
The color schemes are now pulled directly from the configuration
file, except in the case where a dynamic color scheme has been
applied: using escape sequences to change the colors causes
the palette to be forked away from the configuration file.
There's still a low pri TODO around this space: if we're connected
to a remote domain and someone uses dynamic color scheme escapes,
should we reflect those locally? If so then we'll need to build
some plumbing to transport the palette to/from the remote system.
Closes: https://github.com/wez/wezterm/pull/60
This commit:
* Removes the ability to drag the window by the tab bar. I added
that in anticipation of needing to do custom title bar dragging
with Wayland, but it turned out both to be not required and not
possible to drag windows around in that way.
* Replaces the drag logic with dragging the scrollbar thumb
* Clicking above the scrollbar thumb is equivalent to page up
* Clicking below the scrollbar thumb is equivalent to page down
This commit adds a scrollbar that shows the scroll position but
that does not currently allow dragging to scroll.
The scrollbar occupies the right hand side window padding.
The width of the scrollbar can be set by explicitly configuring
`window_padding.right`. If the right padding is set to 0 (which
is its default value), and the scroll bar is enabled then the cell
width will be used for the right padding value instead.
The scrollbar can be enabled/disabled via this config setting:
```
enable_scroll_bar = true
```
Its color by this:
```
[colors]
scrollbar_thumb = "#444444"
```
(Note that color palette config will be reloaded when the config
file is changed, but you'll need to spawn a new tab/window to
see the effects because we cannot assume that a config reload should
always replace a potentially dynamically adjusted color scheme in
a tab).
This commit adds some plumbing for describing the cursor shape
(block, line, blinking etc) and visibility, and feeds that through
the mux and render layers.
The renderer now knows to omit the cursor when it is not visible.
The wayland changes rendered clipboard handling for remote multiplexers
broken, and this commit makes it work again.
It removes the clipboard concept from the the TerminalHost and
keeps it separated as the term::Clipboard concept.
The muxer now has plumbing for passing the Clipboard to its idea
of Windows and Tabs and this is hooked up at window creation and
domain attach time.
This was honestly a PITA because of its complexity. The `clipboard`
crate (now dropped as a dep) didn't support wayland, so I looked at
the `smithay-clipboard` crate, which caused all of my input to become
laggy just by enabling it--even without actually copying or pasting!
Both of those crates try to hide a number of details of working with
the clipboard from the embedding application, but that works against
our window crate implementation, so I decided to integrate it into
the window crate using Futures so that the underlying IPC timing and
potential for the peer to flake out are not completely hidden.
This first commit removes the SystemClipboard type from wezterm
and instead bridges the window crate clipboard to the term crate
Clipboard concept.
The clipboard must be associated with a window in order to function
at all on Wayland, to we place the get/set operations in WindowOps.
This commit effectively breaks the keyboard on the other window
environments; will fix those up in follow on commits.
This isn't complete but begins the process of extracting
the embedding application configuration into a trait provided
by the application rather than passing the values in at
construction.
This allows the application to change configuration at
runtime.
The first option to handle this is the scrollback size.
I keep holding shift while pressing space and seeing stuff get
undone in vim. Super annoying. I didn't see a good way to
teach applications about this via terminfo, so this is off
by default for now.
refs: https://github.com/wez/wezterm/issues/63
Alt-Backspace is the GNUReadline-style shortcut for kill-previous-word.
In wezterm, this currently doesn't work, since this gets trapped by the generic `Backspace` match case.
This diff adds a more specific case for when Backspace is combined with Alt to produce the correct sequence.
This is definitely a hack and there should probably be a more general solution for GNUReadline combinations, but this solves the immediate problem.
I noticed while scrolling `emoji-test.txt` that some of the combined
emoji sequences rendered very poorly. This was due to the unicode
width being reported as up to 4 in some cases.
Digging into it, I discovered that the unicode width crate uses a
standard calculation that doesn't take emoji combination sequences
into account (see https://github.com/unicode-rs/unicode-width/issues/4).
This commit takes a dep on the xi-unicode crate as a lightweight way
to gain access to emoji tables and test whether a given grapheme is
part of a combining sequence of emoji.
This was an unintended casualty of the recent gui layer refactoring.
If you press `option-h` macos generates DOT ABOVE which we pass through
to the terminal key processing layer. It sees that ALT is set and emits
an escape byte (to indicate that ALT is set) followed by the UTF-8
sequence for DOT ABOVE. `zsh` gets confused and treats this as
`<ffffffff>` in its line editor.
This diff restricts the emission of the ESC leader to ascii alphanumeric
characters only.
There needs to be a followup diff to allow configuring how we process
these ALT modified characters on macOS because our current behavior
breaks eg: `ALT-1` which is a hotkey that I use in tmux. Granted that
I don't need tmux with end to end wezterm, but it does prevent me from
using that if I wanted to.
I thought that I'd broken something with the DEL processing in vim with
the new frontend but it turned out that the other frontend was emitting
BS always and that I'd actuall unbroken passing DEL through and that
other layers were translating DEL into an application cursor mode output
for DEL that emits a totally different sequence.
This diff preserves DEL and disables that other sequence.
Will follow up with some explicit configuration to control this
behavior, but in the short term, the default behavior should be much
closer to what people actually want and expect!
refs: https://github.com/wez/wezterm/issues/52
This is still a bit rough because the terminal parser doesn't
understand the pixel sizes, so it relies on the hard coded
cell dimensions being accurate.
This enables using large OSC buffers in a form that we can publish
to crates.io without blocking on an external crate. Large OSC
buffers are important both for some tunnelling use cases and for
eg: iTerm2 image protocol handling.
Repeated moves or wheel events are collapsed so that we don't clog up
the queue. The queue size doesn't matter as much as the latency of
processing a large queue. For fast or repeated moves the queue can grow
rather quickly, and with what is currently ~25-50 ms round trip per
entry for a remote session, that is a poor UX.
