## Summary of the Pull Request
This adds a new action, `clearBuffer`. It accepts 3 values for the `clear` type:
* `"clear": "screen"`: Clear the terminal viewport content. Leaves the scrollback untouched. Moves the cursor row to the top of the viewport (unmodified).
* `"clear": "scrollback"`: Clear the scrollback. Leaves the viewport untouched.
* `"clear": "all"`: (**default**) Clear the scrollback and the visible viewport. Moves the cursor row to the top of the viewport (unmodified).
"Clear Buffer" has also been added to `defaults.json`.
## References
* From microsoft/vscode#75141 originally
## PR Checklist
* [x] Closes#1193
* [x] Closes#1882
* [x] I work here
* [x] Tests added/passed
* [ ] Requires documentation to be updated
## Detailed Description of the Pull Request / Additional comments
This is a bit tricky, because we need to plumb it all the way through conpty to clear the buffer. If we don't, then conpty will immediately just redraw the screen. So this sends a signal to the attached conpty, and then waits for conpty to draw the updated, cleared, screen back to us.
## Validation Steps Performed
* works for each of the three clear types as expected
* tests pass.
* works even with `ping -t 8.8.8.8` as you'd hope.
## Summary of the Pull Request
**Naive implementation** of exporting the text buffer of the current pane
into a text file triggered from the tab context menu.
**Disclaimer: this is not an export of the command history,**
but rather just a text buffer dumped into a file when asked explicitly.
## References
Should provide partial solution for #642.
## Detailed Description of the Pull Request / Additional comments
The logic is following:
* Open a file save picker
* The location is Downloads folder (should be always accessible)
* The suggest name of the file equals to the pane's title
* The allowed file formats list contains .txt only
* If no file selected stop
* Lock terminal
* Read all lines till the cursor
* Format each line by removing trailing white-spaces and adding CRLF if not wrapped
* Asynchronously write to selected file
* Show confirmation
As the action is relatively fast didn't add a progress bar or any other UX.
As the buffer is relatively small, holding it entirely in the memory rather than
writing line by line to disk.
#### ⚠️ targets #10051
## Summary of the Pull Request
This updates our `ThrottledFunc`s to take a dispatcher parameter. This means that we can use the `Windows::UI::Core::CoreDispatcher` in the `TermControl`, where there's always a `CoreDispatcher`, and use a `Windows::System::DispatcherQueue` in `ControlCore`/`ControlInteractivity`. When running in-proc, these are always the _same thing_. However, out-of-proc, the core needs a dispatcher queue that's not tied to a UI thread (because the content proces _doesn't have a UI thread!_).
This lets us get rid of the output event, because we don't need to bubble that event out to the `TermControl` to let it throttle that update anymore.
## References
* Tear-out: #1256
* Megathread: #5000
* Project: https://github.com/microsoft/terminal/projects/5
## PR Checklist
* [x] This is a part of #1256
* [x] I work here
* [n/a] Tests added/passed
* [n/a] Requires documentation to be updated
## Detailed Description of the Pull Request / Additional comments
Fortunately, `winrt::resume_foreground` works the same on both a `CoreDispatcher` and a `DispatcherQueue`, so this wasn't too hard!
## Validation Steps Performed
This was validated in `dev/migrie/oop/the-whole-thing` (or `dev/migrie/oop/connection-factory`, I forget which), and I made sure that it worked both in-proc and x-proc. Not only that, _it wasn't any slower_!This reverts commit 04b751faa7.
## Summary of the Pull Request
This forces the `TermControl` to only use `ControlCore` and `ControlInteractivity` via their WinRT projections. We want this, because WinRT projections can be used across process boundaries. In the future, `ControlCore` and `ControlInteractivity` are going to be living in a different process entirely from `TermControl`. By enforcing this boundary now, we can make sure that they will work seamlessly in the future.
## References
* Tear-out: #1256
* Megathread: #5000
* Project: https://github.com/microsoft/terminal/projects/5
## PR Checklist
* [x] Closes https://github.com/microsoft/terminal/projects/5#card-50760270
* [x] I work here
* [x] Tests added/passed
* [n/a] Requires documentation to be updated
## Detailed Description of the Pull Request / Additional comments
Most all this was just converting pure c++ types to winrt types when possible. I've added a couple helper projections with `til` converters, which made most of this really easy.
The "`MouseButtonState` needs to be composed of `Int32`s instead of `bool`s" is MENTAL. I have no idea why this is, but when I had the control OOP in the sample, that would crash when trying to de-marshal the bools. BODGY.
The biggest changes are in the way the UIA stuff is hooked up. The UiaEngine needs to be attached directly to the `Renderer`, and it can't be easily projected, so it needs to live next to the `ControlCore`. But the `TermControlAutomationPeer` needed the `UiaEngine` to help implement some interfaces.
Now, there's a new layer we've introduced. `InteractivityAutomationPeer` does the `ITextProvider`, `IControlAccessibilityInfo` and the `IUiaEventDispatcher` thing. `TermControlAutomationPeer` now has a
`InteractivityAutomationPeer` stashed inside itself, so that it can ask the interactivity layer to do the real work. We still need the `TermControlAutomationPeer` though, to be able to attach to the real UI tree.
## Validation Steps Performed
The terminal behaves basically the same as before.
Most importantly, I whipped out Accessibility Insights, and the Terminal looks the same as before.
This commit introduce three new `til` features:
* "til/latch.h": A std::latch clone, until we're on C++20.
* "til/mutex.h": A safe mutex wrapper, which only allows you access to the protected data after locking it. No more forgetting to lock mutexes!
* "til/throttled_func.h": Function invocation throttling used to be available as the `ThrottledFunc` class already. But this class is vastly more efficient and doesn't rely on any WinRT types.
This PR also adds a `til::ends_with` string helper which is `til::starts_with` counterpart.
## Validation Steps Performed
* Scrollbar throttling still works as it used to ✔️
* No performance regressions when printing big.txt ✔️Closes#10393
## Summary of the Pull Request
ControlCore::AttachUiaEngine receives a IRenderEngine as a raw pointer,
which TermControl owns. We must ensure that we first destroy the
ControlCore before the UiaEngine instance (both owned by TermControl).
Otherwise a deallocated IRenderEngine is accessed when
ControlCore calls Renderer::TriggerTeardown.
## References
This crash was introduced in #10031.
## PR Checklist
* [x] I work here
* [x] Tests added/passed
## Validation Steps Performed
* Run accevent.exe to cause a UiaEngine to be attached to a TermControl.
* Close the current tab
* Ensured no crashes occur
## Summary of the Pull Request
Brace yourselves, it's finally here. This PR does the dirty work of splitting the monolithic `TermControl` into three components. These components are:
* `ControlCore`: This encapsulates the `Terminal` instance, the `DxEngine` and `Renderer`, and the `Connection`. This is intended to everything that someone might need to stand up a terminal instance in a control, but without any regard for how the UX works.
* `ControlInteractivity`: This is a wrapper for the `ControlCore`, which holds the logic for things like double-click, right click copy/paste, selection, etc. This is intended to be a UI framework-independent abstraction. The methods this layer exposes can be called the same from both the WinUI TermControl and the WPF control.
* `TermControl`: This is the UWP control. It's got a Core and Interactivity inside it, which it uses for the actual logic of the terminal itself. TermControl's main responsibility is now
By splitting into smaller pieces, it will enable us to
* write unit tests for the `Core` and `Interactivity` bits, which we desparately need
* Combine `ControlCore` and `ControlInteractivity` in an out-of-proc core process in the future, to enable tab tearout.
However, we're not doing that work quite yet. There's still lots of work to be done to enable that, thought this is likely the biggest portion.
Ideally, this would just be methods moved wholesale from one file to another. Unfortunately, there are a bunch of cases where that didn't work as well as expected. Especially when trying to better enforce the boundary between the classes.
We've got a couple tests here that I've added. These are partially examples, and partially things I ran into while implementing this. A bunch of things from #7001 can go in now that we have this.
This PR is gonna be a huge pain to review - 38 files with 3,730 additions and 1,661 deletions is nothing to scoff at. It will also conflict 100% with anything that's targeting `TermControl`. I'm hoping we can review this over the course of the next week and just be done with it, and leave plenty of runway for 1.9 bugs in post.
## References
* In pursuit of #1256
* Proc Model: #5000
* https://github.com/microsoft/terminal/projects/5
## PR Checklist
* [x] Closes#6842
* [x] Closes https://github.com/microsoft/terminal/projects/5#card-50760249
* [x] Closes https://github.com/microsoft/terminal/projects/5#card-50760258
* [x] I work here
* [x] Tests added/passed
* [n/a] Requires documentation to be updated
## Detailed Description of the Pull Request / Additional comments
* I don't love the names `ControlCore` and `ControlInteractivity`. Open to other names.
* I added a `ICoreState` interface for "properties that come from the `ControlCore`, but consumers of the `TermControl` need to know". In the future, these will all need to be handled specially, because they might involve an RPC call to retrieve the info from the core (or cache it) in the window process.
* I've added more `EventArgs` to make more events proper `TypedEvent`s.
* I've changed how the TerminalApp layer requests updated TaskbarProgress state. It doesn't need to pump TermControl to raise a new event anymore.
* ~~Something that snuck into this branch in the very long history is the switch to `DCompositionCreateSurfaceHandle` for the `DxEngine`. @miniksa wrote this originally in 30b8335, I'm just finally committing it here. We'll need that in the future for the out-of-proc stuff.~~
* I reverted this in c113b65d9. We can revert _that_ commit when we want to come back to it.
* I've changed the acrylic handler a decent amount. But added tests!
* All the `ThrottledFunc` things are left in `TermControl`. Some might be able to move down into core/interactivity, but once we figure out how to use a different kind of Dispatcher (because a UI thread won't necessarily exist for those components).
* I've undoubtably messed up the merging of the locking around the appearance config stuff recently
## Validation Steps Performed
I've got a rolling list in https://github.com/microsoft/terminal/issues/6842#issuecomment-810990460 that I'm updating as I go.
