1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
//! Actual fresh-profile browser shutdown before caller-owned directory cleanup.
mod observer;
use std::io;
use super::{
callbacks::{
remove_message, remove_navigation_completed, remove_navigation_starting, remove_new_window,
remove_permission_requested,
},
error::windows_error,
view::WebViewHost,
};
impl WebViewHost {
/// Closes callbacks, the controller and the parent window synchronously.
///
/// All cleanup steps are attempted. The first native error is returned
/// after the remaining handles have been released.
/// An explicitly configured fresh profile also waits for its actual
/// `BrowserProcessExited` event before releasing the environment, proving
/// the runtime has released the caller's user-data directory. Shared default
/// profiles retain their existing controller-only close behavior.
///
/// # Errors
/// Returns the first callback-removal, controller-close or window-close
/// error observed during teardown, or owned-profile browser-exit observation
/// failure. A failed close remains failed on subsequent calls.
pub fn close(&mut self) -> io::Result<()> {
if self.closed {
return match &self.close_error {
Some((kind, context)) => Err(io::Error::new(*kind, context.clone())),
None => Ok(()),
};
}
let mut first_error = None;
if let Some(mut startup) = self.startup.take()
&& let Err(error) = startup.close()
{
first_error = Some(error);
}
let observer = if self.config.user_data_folder().is_some() {
match self.webview.as_ref().zip(self.environment.as_ref()) {
Some((webview, environment)) => {
match observer::BrowserExit::register(webview, environment) {
Ok(observer) => Some(observer),
Err(error) => {
first_error.get_or_insert(error);
None
}
}
}
None => {
first_error.get_or_insert_with(|| {
io::Error::new(
io::ErrorKind::NotConnected,
"WebView2 owned profile has no live browser to observe",
)
});
None
}
}
} else {
None
};
if let Some(webview) = self.webview.as_ref() {
remove_navigation_starting(
webview,
&mut self.callbacks.navigation_starting,
&mut first_error,
);
remove_navigation_completed(
webview,
&mut self.callbacks.navigation_completed,
&mut first_error,
);
remove_new_window(webview, &mut self.callbacks.new_window, &mut first_error);
remove_permission_requested(
webview,
&mut self.callbacks.permission_requested,
&mut first_error,
);
remove_message(webview, &mut self.callbacks.message, &mut first_error);
}
if let Some(controller) = self.controller.take()
&& let Err(error) = unsafe { controller.Close() }.map_err(windows_error)
{
first_error.get_or_insert(error);
}
self.webview.take();
if let Some(observer) = observer
&& let Err(error) = observer.wait(self.config.wait())
{
first_error.get_or_insert(error);
}
self.environment.take();
if let Err(error) = self.window.close() {
first_error.get_or_insert(error);
}
self.closed = true;
self.close_error = first_error
.as_ref()
.map(|error| (error.kind(), error.to_string()));
match first_error {
Some(error) => Err(error),
None => Ok(()),
}
}
}