See https://zed.dev/channel/gpui-536
Fixes https://github.com/zed-industries/zed/issues/9010
Fixes https://github.com/zed-industries/zed/issues/8883
Fixes https://github.com/zed-industries/zed/issues/8640
Fixes https://github.com/zed-industries/zed/issues/8598
Fixes https://github.com/zed-industries/zed/issues/8579
Fixes https://github.com/zed-industries/zed/issues/8363
Fixes https://github.com/zed-industries/zed/issues/8207
### Problem
After transitioning Zed to GPUI 2, we started noticing that interacting
with the mouse on many UI elements would lead to a pretty annoying
flicker. The main issue with the old approach was that hover state was
calculated based on the previous frame. That is, when computing whether
a given element was hovered in the current frame, we would use
information about the same element in the previous frame.
However, inspecting the previous frame tells us very little about what
should be hovered in the current frame, as elements in the current frame
may have changed significantly.
### Solution
This pull request's main contribution is the introduction of a new
`after_layout` phase when redrawing the window. The key idea is that
we'll give every element a chance to register a hitbox (see
`ElementContext::insert_hitbox`) before painting anything. Then, during
the `paint` phase, elements can determine whether they're the topmost
and draw their hover state accordingly.
We are also removing the ability to give an arbitrary z-index to
elements. Instead, we will follow the much simpler painter's algorithm.
That is, an element that gets painted after will be drawn on top of an
element that got painted earlier. Elements can still escape their
current "stacking context" by using the new `ElementContext::defer_draw`
method (see `Overlay` for an example). Elements drawn using this method
will still be logically considered as being children of their original
parent (for keybinding, focus and cache invalidation purposes) but their
layout and paint passes will be deferred until the currently-drawn
element is done.
With these changes we also reworked geometry batching within the
`Scene`. The new approach uses an AABB tree to determine geometry
occlusion, which allows the GPU to render non-overlapping geometry in
parallel.
### Performance
Performance is slightly better than on `main` even though this new
approach is more correct and we're maintaining an extra data structure
(the AABB tree).
Release Notes:
- Fixed a bug that was causing popovers to flicker.
---------
Co-authored-by: Nathan Sobo <nathan@zed.dev>
Co-authored-by: Thorsten <thorsten@zed.dev>
We were seeing panics due to callers assuming they had valid
excerpt_ids, but that cannot easily be guaranteed across await points as
anyone may remove an excerpt.
Release Notes:
- Fixed a panic when hovering in a multibuffer
I think this makes it less chaotic to edit text when the inlay hints are
on.
It's for cases where you're editing to the right side of an inlay hint.
Example:
```rust
for name in names.iter().map(|item| item.len()) {
println!("{:?}", name);
}
```
We display a `usize` inlay hint right next to `name`.
But as soon as you remove that `.` in `names.iter` your cursor jumps
around because the inlay hint has been removed.
With this change we now have a 700ms debounce before we update the inlay
hints.
VS Code seems to have an even longer debounce, I think somewhere around
~1s.
Release Notes:
- Added debouncing to make it easier to edit text when inlay hints are
enabled and to save rendering of inlay hints when scrolling. Both
debounce durations can be configured with `{"inlay_hints":
{"edit_debounce_ms": 700}}` (default) and `{"inlay_hints":
{"scroll_debounce_ms": 50}}`. Set a value to `0` to turn off the
debouncing.
### Before
https://github.com/zed-industries/zed/assets/1185253/3afbe548-dcfb-45a3-ab9f-cce14c04a148
### After
https://github.com/zed-industries/zed/assets/1185253/7ea90e42-bca6-4f6c-995e-83324669ab43
---------
Co-authored-by: Kirill <kirill@zed.dev>
This adds one feature I've been missing a lot in Vim mode: `gx` to open
the URL under the cursor.
Technically, in Vim, `gx` opens more "paths", not just URLs, but I think
this is a good start.
Release Notes:
- Added `gx` to Vim mode to open the URL under the cursor.
Demo:
https://github.com/zed-industries/zed/assets/1185253/6a19490d-b61d-40b7-93e8-4819599f6977
Kirill Bulatov
Ivan Žužak
Conrad Irwin
Marshall Bowers
Thorsten BallandKirill
Piotr Osiewicz
