1use editor::Editor;
 2use encoding_rs::{Encoding, UTF_8};
 3use gpui::{
 4    Context, Entity, IntoElement, ParentElement, Render, Styled, Subscription, Window, div,
 5};
 6use ui::{Button, ButtonCommon, Clickable, LabelSize, Tooltip};
 7use workspace::{
 8    StatusBarSettings, StatusItemView, Workspace,
 9    item::{ItemHandle, Settings},
10};
11
12pub struct ActiveBufferEncoding {
13    active_encoding: Option<&'static Encoding>,
14    //workspace: WeakEntity<Workspace>,
15    _observe_active_editor: Option<Subscription>,
16    has_bom: bool,
17}
18
19impl ActiveBufferEncoding {
20    pub fn new(_workspace: &Workspace) -> Self {
21        Self {
22            active_encoding: None,
23            //workspace: workspace.weak_handle(),
24            _observe_active_editor: None,
25            has_bom: false,
26        }
27    }
28
29    fn update_encoding(&mut self, editor: Entity<Editor>, _: &mut Window, cx: &mut Context<Self>) {
30        self.active_encoding = None;
31
32        let editor = editor.read(cx);
33        if let Some((_, buffer, _)) = editor.active_excerpt(cx) {
34            let buffer = buffer.read(cx);
35
36            self.active_encoding = Some(buffer.encoding());
37            self.has_bom = buffer.has_bom();
38        }
39
40        cx.notify();
41    }
42}
43
44impl Render for ActiveBufferEncoding {
45    fn render(&mut self, _: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
46        let Some(active_encoding) = self.active_encoding else {
47            return div().hidden();
48        };
49
50        let display_option = StatusBarSettings::get_global(cx).active_encoding_button;
51        let is_utf8 = active_encoding == UTF_8;
52        if !display_option.should_show(is_utf8, self.has_bom) {
53            return div().hidden();
54        }
55
56        let mut text = active_encoding.name().to_string();
57        if self.has_bom {
58            text.push_str(" (BOM)");
59        }
60
61        div().child(
62            Button::new("change-encoding", text)
63                .label_size(LabelSize::Small)
64                .on_click(|_, _, _cx| {
65                    // No-op
66                })
67                .tooltip(Tooltip::text("Current Encoding")),
68        )
69    }
70}
71
72impl StatusItemView for ActiveBufferEncoding {
73    fn set_active_pane_item(
74        &mut self,
75        active_pane_item: Option<&dyn ItemHandle>,
76        window: &mut Window,
77        cx: &mut Context<Self>,
78    ) {
79        if let Some(editor) = active_pane_item.and_then(|item| item.downcast::<Editor>()) {
80            self._observe_active_editor =
81                Some(cx.observe_in(&editor, window, Self::update_encoding));
82            self.update_encoding(editor, window, cx);
83        } else {
84            self.active_encoding = None;
85            self.has_bom = false;
86            self._observe_active_editor = None;
87        }
88
89        cx.notify();
90    }
91}