Display a warning if SUI is unable to write to settings file #19027
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Demo
Urgh. I guess the dialog's title is slightly incorrect. Can be fixed if desired. |
carlos-zamora
commented
Jun 13, 2025
| @@ -97,6 +97,7 @@ namespace TerminalApp | |||
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| event Windows.Foundation.TypedEventHandler<Object, Object> OpenSystemMenu; | |||
| event Windows.Foundation.TypedEventHandler<Object, Microsoft.Terminal.Control.ShowWindowArgs> ShowWindowChanged; | |||
| event Windows.Foundation.TypedEventHandler<Object, Windows.Foundation.Collections.IVectorView<Microsoft.Terminal.Settings.Model.SettingsLoadWarnings> > ShowLoadWarningsDialog; | |||
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Fun fact: you need the space here - SettingsLoadWarnings> > ShowLoadWarningsDialog or else the MIDL compiler gets angry and confused
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Summary of the Pull Request
Adds logic to display a warning popup if the settings.json is marked as read-only and we try to write to the settings.json file. Previously, this scenario would crash, which definitely isn't right. However, a simple fix of "not-crashing" wouldn't feel right either.
This leverages the existing infrastructure to display a warning dialog when we failed to write to the settings file. The main annoyance here is that that popup dialog is located in
TerminalWindowand is normally triggered from a failedSettingsLoadEventArgs. To get around this,CascadiaSettings::WriteSettingsToDisk()now returns a boolean to signal if the write was successful; whereas if it fails, a warning is added to the settings object. If we fail to write to disk, the function will return false and we'll raise an event with the settings' warnings toTerminalPagewhich passes it along toTerminalWindow.Additionally, this uses
IVectorView<SettingsLoadWarnings>as opposed toIVector<SettingsLoadWarnings>throughout the relevant code. It's more correct as the list of warnings shouldn't be mutable and the warnings from theCascadiaSettingsobject are retrieved in that format.Validation Steps Performed
Closes #18913