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dtmm: Document error dialog

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This commit is contained in:
Lucas Schwiderski 2023-11-24 10:13:59 +01:00
parent de1bd64007
commit 6f0fdc5086
Signed by: lucas
GPG key ID: AA12679AAA6DF4D8
1 changed files with 11 additions and 1 deletions
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12
crates/dtmm/src/ui/window/dialog.rs
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@ -7,11 +7,14 @@ use crate::ui::widget::button::Button;
const WINDOW_SIZE: (f64, f64) = (600., 250.);
/// Show an error dialog.
/// The title and message are extracted from the error chain in the given `Report`.
pub fn error<T: Data>(err: Report, _parent: WindowHandle) -> WindowDesc<T> {
let (title, msg) = {
let count = err.chain().count();
if count == 1 {
// If there is only one error, that's all we can show.
(
String::from("An error occurred!"),
err.root_cause().to_string(),
@ -20,13 +23,20 @@ pub fn error<T: Data>(err: Report, _parent: WindowHandle) -> WindowDesc<T> {
let first = err.chain().next().unwrap();
let root = err.root_cause();
// If there is more than one error in the chain we want to show
// - The first one: This will describe the overall operation that failed
// - The root cause: The actual thing that failed (e.g. 'No such file or directory')
// - The one before the root cause: With diligent `wrap_err` usage, this will provide
// context to the root cause (e.g. the file name we failed to access)
//
// If there are only two errors, the first one is also the context to the root cause.
if count > 2 {
// The second to last one, the context to the root cause
let context = err.chain().nth(count - 2).unwrap();
(format!("{first}!"), format!("{}: {}", context, root))
} else {
(format!("{first}!"), root.to_string())
("An error occurred!".to_string(), format!("{}: {}", first, root))
}
}
};