## Summary of the Pull Request
Fixes two issues related to SUI's Actions page:
1. Crash when adding an action and setting key chord to one that is already taken
- **Cause**: the new key binding that was introduced with the "Add new" button appears in `_KeyBindingList` that we're iterating over. This has no `CurrentKeys()`, resulting in a null pointer exception.
- **Fix**: null-check it
2. There's an action that appears as being nameless in the dropdown
- **Cause**: The culprit seems to be `MultipleActions`. We would register it, but it wouldn't have a name, so it would appear as a nameless option.
- **Fix**: if it has no name, don't register it. This is also future-proof in that any new nameless actions won't be automatically added.
Closes#10981
Part of #11353
## Summary of the Pull Request
Replaces the key chord editor in the actions page with a listener instead of a plain text box.
## References
#6900 - Settings UI Epic
## Detailed Description of the Pull Request / Additional comments
- `Actions` page:
- Replace `Keys` with `CurrentKeys` for consistency with `Action`/`CurrentAction`
- `ProposedKeys` is now a `Control::KeyChord`
- removes key chord validation (now we don't need it)
- removes accept/cancel shortcuts (nowhere we could use it now)
- `KeyChordListener`:
- `Keys`: dependency property that hooks us up to a system to the committed setting value
- this is the key binding view model, which propagates the change to the settings model clone on "accept changes"
- We bind to `PreviewKeyDown` to intercept the key event _before_ some special key bindings are handled (i.e. "select all" in the text box)
- `CoreWindow` is used to get the modifier keys because (1) it's easier than updating on each key press and (2) that approach resulted in a strange bug where the <kbd>Alt</kbd> key-up event was not detected
- `LosingFocus` means that we have completed our operation and want to commit our changes to the key binding view model
- `KeyDown` does most of the magic of updating `Keys`. We filter out any key chords that could be problematic (i.e. <kbd>Shift</kbd>+<kbd>Tab</kbd> and <kbd>Tab</kbd> for keyboard navigation)
## Validation Steps Performed
- Tested a few key chords:
- ✅single key: <kbd>X</kbd>
- ✅key with modifier(s): <kbd>Ctrl</kbd>+<kbd>Alt</kbd>+<kbd>X</kbd>
- ❌plain modifier: <kbd>Ctrl</kbd>
- ✅key that is used by text box: <kbd>Ctrl+A</kbd>
- ✅key that is used by Windows Terminal: <kbd>Alt</kbd>+<kbd>F4</kbd>
- ❌key that is taken by Windows OS: <kbd>Windows</kbd>+<kbd>X</kbd>
- ✅key that is not taken by Windows OS: <kbd>Windows</kbd>+<kbd>Shift</kbd>+<kbd>X</kbd>
- Known issue:
- global key taken by Windows Terminal: (i.e. quake mode keybinding)
- Behavior: global key binding executed
- Expected: key chord recorded
## Demo
## Summary of the Pull Request
This adds the "add new" button to the actions page. It build on the work of #10220 by basically just adding a new list item to the top of the key binding list.
This also makes it so that if you click the "accept changes" button when you have an invalid key chord, we don't do anything.
## References
#6900 - Actions page Epic
#9427 - Actions page design doc
#10220 - Actions page PR - set action
## Detailed Description of the Pull Request / Additional comments
- `ModifyKeyBindingEventArgs` is used to introduce new key bindings. We just ignore `OldKeys` and `OldActionName` because both didn't exist before.
- `IsNewlyAdded` tracks if this is an action that was added, but has not been confirmed to add to the settings model.
- `CancelChanges()` is directly bound to the cancel button. This allows us to delete the key binding when it's clicked on a "newly added" action.
## Validation Steps Performed
- Cancel:
- Deletes the action (because it doesn't truly exist until you confirm changes)
- Accept:
- Adds the new action.
- If you attempt to edit it, the delete button is back.
- Add Action:
- Delete button should not be visible (redundant with 'Cancel')
- Action should be initialized to a value
- Key chord should be empty
- Cannot add another action if a newly added action exists
- Keyboard interaction:
- escape --> cancel
- enter --> accept
- Accessibility:
- "add new" button has a name
- Interaction with other key bindings:
- editing another action --> delete the "newly added" action (it hasn't been added yet)
- only one action can be edited at a time
This introduces the ability to set the action for a key binding. A combo box is used to let the user select a new action.
## References
#6900 - Actions page Epic
#9427 - Actions page design doc
#9949 - Actions page PR
## Detailed Description of the Pull Request / Additional comments
### Settings Model Changes
- `ActionAndArgs`
- new ctor that just takes a `ShortcutAction`
- `ActionMap`
- `AvailableActions` provides a map of all the "acceptable" actions to choose from. This is a merged list of (1) all `{ "command": X }` style actions and (2) any actions with args that are already defined in the ActionMap (or any parents).
- `RegisterKeyBinding` introduces a new unnamed key binding to the action map.
### Editor Changes
- XAML
- Pretty straightforward, when in edit mode, we replace the text block with a combo box. This combo box just presents the actions you can choose from.
- `RebindKeysEventArgs` --> `ModifyKeyBindingEventArgs`
- `AvailableActionAndArgs`
- stores the list of actions to choose from in the combo box
- _Unfortunately_, `KeyBindingViewModel` needs this so that we can populate the combo box
- `Actions` stores and maintains this though. We populate this from the settings model on navigation.
- `ProposedAction` vs `CurrentAction`
- similar to `ProposedKeys` and `Keys`, we need a way to distinguish the value from the settings model and the value of the control (i.e. combo box).
- `CurrentAction` --> settings model
- `ProposedAction` --> combo box selected item
## Validation Steps Performed
- Cancel:
- ✔️ change action --> cancel button --> begin editing action again --> original action is selected
- Accept:
- ✔️ don't change anything
- ✔️ change action --> OK! --> Save!
- NOTE: The original action is still left as a stub `{ "command": "closePane" }`. This is intentional because we want to prevent all modifications to the command palette.
- ✔️ change action & change key chord --> OK! --> Save!
- ✔️ change action & change key chord (conflicting key chord) --> OK! --> click ok on flyout --> Save!
- NOTE: original action is left as a stub; original key chord explicitly unbound; new command/keys combo added.
Applies feedback from https://github.com/microsoft/terminal/pull/9949#pullrequestreview-662590658
Highlights include:
- bugfix: make all edit buttons stay visible if the user is using assistive technology
- rename a few functions and resources to match the correct naming scheme
- update the localized text for a conflicting key chord being assigned
- provide better comments throughout the actions page code
## References
#9949 - Original PR
Closes#10168
## Summary of the Pull Request
This PR lays the foundation for a new Actions page in the Settings UI as designed in #6900. The Actions page now leverages the `ActionMap` to display all of the key bindings and allow the user to modify the associated key chord or delete the key binding entirely.
## References
#9621 - ActionMap
#9926 - ActionMap serialization
#9428 - ActionMap Spec
#6900 - Actions page
#9427 - Actions page design doc
## Detailed Description of the Pull Request / Additional comments
### Settings Model Changes
- `Command::Copy()` now copies the `ActionAndArgs`
- `ActionMap::RebindKeys()` handles changing the key chord of a key binding. If a conflict occurs, the conflicting key chord is overwritten.
- `ActionMap::DeleteKeyBinding()` "deletes" a key binding by binding "unbound" to the given key chord.
- `ActionMap::KeyBindings()` presents another view (similar to `NameMap`) of the `ActionMap`. It specifically presents a map of key chords to commands. It is generated similar to how `NameMap` is generated.
### Editor Changes
- `Actions.xaml` is mainly split into two parts:
- `ListView` (as before) holds the list of key bindings. We _could_ explore the idea of an items repeater, but the `ListView` seems to provide some niceties with regards to navigating the list via the key board (though none are selectable).
- `DataTemplate` is used to represent each key binding inside the `ListView`. This is tricky because it is bound to a `KeyBindingViewModel` which must provide _all_ context necessary to modify the UI and the settings model. We cannot use names to target UI elements inside this template, so we must make the view model smart and force updates to the UI via changes in the view model.
- `KeyBindingViewModel` is a view model object that controls the UI and the settings model.
There are a number of TODOs in Actions.cpp will be long-term follow-ups and would be nice to have. This includes...
- a binary search by name on `Actions::KeyBindingList`
- presenting an error when the provided key chord is invalid.
## Demo
This entirely removes `KeyMapping` from the settings model, and builds on the work done in #9543 to consolidate all actions (key bindings and commands) into a unified data structure (`ActionMap`).
## References
#9428 - Spec
#6900 - Actions page
Closes#7441
## Detailed Description of the Pull Request / Additional comments
The important thing here is to remember that we're shifting our philosophy of how to interact/represent actions. Prior to this, the actions arrays in the JSON would be deserialized twice: once for key bindings, and again for commands. By thinking of every entry in the relevant JSON as a `Command`, we can remove a lot of the context switching between working with a key binding vs a command palette item.
#9543 allows us to make that shift. Given the work in that PR, we can now deserialize all of the relevant information from each JSON action item. This allows us to simplify `ActionMap::FromJson` to simply iterate over each JSON action item, deserialize it, and add it to our `ActionMap`.
Internally, our `ActionMap` operates as discussed in #9428 by maintaining a `_KeyMap` that points to an action ID, and using that action ID to retrieve the `Command` from the `_ActionMap`. Adding actions to the `ActionMap` automatically accounts for name/key-chord collisions. A `NameMap` can be constructed when requested; this is for the Command Palette.
Querying the `ActionMap` is fairly straightforward. Helper functions were needed to be able to distinguish an explicit unbinding vs the command not being found in the current layer. Internally, we store explicitly unbound names/key-chords as `ShortcutAction::Invalid` commands. However, we return `nullptr` when a query points to an unbound command. This is done to hide this complexity away from any caller.
The command palette still needs special handling for nested and iterable commands. Thankfully, the expansion of iterable commands is performed on an `IMapView`, so we can just expose `NameMap` as a consolidation of `ActionMap`'s `NameMap` with its parents. The same can be said for exposing key chords in nested commands.
## Validation Steps Performed
All local tests pass.
This was the only thing blocking me from signing off on #9224 in 1.7.
! CHANGE WARNING !
If we bind to `T.S.M.Command`s in XAML, then the compiler gets _very
angry_ at us. It generates two different versions of
`GetReferenceTypeMember_Icon` in `XamlTypeInfo.g.cpp`. Presumably
because there's an Icon on a NavViewItem and an Icon on a Command. We
don't really know why. Fortunately, the fix is "rename Command::Icon" to
"Command::IconPath". It's dumb, but it works. Thanks for the help with
that one Carlos ☺️
Unblocks #9224
