### TODO
- [x] Make sure keybinding shows up in pane + menu
- [x] Selection tool in the editor toolbar
- [x] Application Menu
- [x] Add more options to pane + menu
- Go to File...
- Go to Symbol in Project...
- [x] Add go items to the selection tool in the editor:
- Go to Symbol in Editor...
- Go to Line/Column...
- Next Problem
- Previous Problem
- [x] Fix a bug where modals opened from a context menu aren't focused
correclty
- [x] Determine if or what needs to be done with project actions:
- Difficulty is that these are exposed in the UI via clicking the
project name in the titlebar or by right clicking the root entry in the
project panel. But they require reading and are two clicks away. Is that
sufficient?
- Add Folder to Project
- Open a new project
- Open recent
- [x] Get a style pass
- [x] Implement style pass
- [x] Fix the wrong actions in the selection menu
- [x] Show selection tool toggle in the 'editor settings' thing
- [x] Put preferences section from the app menu onto the right hand user
menu
- [x] Add Project menu into app menu to replace 'preferences' section,
and put the rest of the actions there
- [ ] ~~Adopt `...` convention for opening a surface~~ uncertain what
this convention is.
- [x] Adopt link styling for webview actions
- [x] Set lucide hamburger for menu icon
- [x] Gate application menu to only show on Linux and Windows
Release Notes:
- Added a 'selection and movement' tool to the Editor's toolbar, as well
as controls to toggle it and a setting to remove it (`"toolbar":
{"selections_menu": true/false }`)
- Changed the behavior of the `+` menu in the tab bar to use standard
actions and keybindings. Replaced 'New Center Terminal' with 'New
Terminal', and 'New Search', with the usual 'Deploy Search'. Also added
item-creating actions to this menu.
- Added an 'application' menu to the titlebar to Linux and Windows
builds of Zed
Release Notes:
- Now when an editor loses focus (e.g. from switching tabs) and then
gains focus again, it doesn't close the inline assist. Instead, it only
closes when you move the cursor outside of it, e.g. by clicking
somewhere else in its parent editor.
---------
Co-authored-by: Antonio Scandurra <me@as-cii.com>
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>
This PR renames the `h_stack` and `v_stack` to `h_flex` and `v_flex`,
respectively.
We were previously using `h_stack` and `v_stack` to match SwiftUI, but
`h_flex` and `v_flex` fit better with the web/flexbox terminology that
the rest of GPUI uses.
Additionally, we were already calling the utility functions used to
implement `h_stack` and `v_stack` by the new names.
Release Notes:
- N/A