Merge branch 'main' into project-panel-context-menu

crates/welcome2/src/base_keymap_picker.rs

@@ -0,0 +1,208 @@
+use super::base_keymap_setting::BaseKeymap;
+use fuzzy::{match_strings, StringMatch, StringMatchCandidate};
+use gpui::{
+    actions, AppContext, DismissEvent, EventEmitter, FocusableView, ParentElement, Render, Task,
+    View, ViewContext, VisualContext, WeakView,
+};
+use picker::{Picker, PickerDelegate};
+use project::Fs;
+use settings::{update_settings_file, Settings};
+use std::sync::Arc;
+use ui::ListItem;
+use util::ResultExt;
+use workspace::{ui::HighlightedLabel, Workspace};
+
+actions!(ToggleBaseKeymapSelector);
+
+pub fn init(cx: &mut AppContext) {
+    cx.observe_new_views(|workspace: &mut Workspace, _cx| {
+        workspace.register_action(toggle);
+    })
+    .detach();
+}
+
+pub fn toggle(
+    workspace: &mut Workspace,
+    _: &ToggleBaseKeymapSelector,
+    cx: &mut ViewContext<Workspace>,
+) {
+    let fs = workspace.app_state().fs.clone();
+    workspace.toggle_modal(cx, |cx| {
+        BaseKeymapSelector::new(
+            BaseKeymapSelectorDelegate::new(cx.view().downgrade(), fs, cx),
+            cx,
+        )
+    });
+}
+
+pub struct BaseKeymapSelector {
+    focus_handle: gpui::FocusHandle,
+    picker: View<Picker<BaseKeymapSelectorDelegate>>,
+}
+
+impl FocusableView for BaseKeymapSelector {
+    fn focus_handle(&self, _cx: &AppContext) -> gpui::FocusHandle {
+        self.focus_handle.clone()
+    }
+}
+
+impl EventEmitter<DismissEvent> for BaseKeymapSelector {}
+
+impl BaseKeymapSelector {
+    pub fn new(
+        delegate: BaseKeymapSelectorDelegate,
+        cx: &mut ViewContext<BaseKeymapSelector>,
+    ) -> Self {
+        let picker = cx.build_view(|cx| Picker::new(delegate, cx));
+        let focus_handle = cx.focus_handle();
+        Self {
+            focus_handle,
+            picker,
+        }
+    }
+}
+
+impl Render for BaseKeymapSelector {
+    type Element = View<Picker<BaseKeymapSelectorDelegate>>;
+
+    fn render(&mut self, _cx: &mut ViewContext<Self>) -> Self::Element {
+        self.picker.clone()
+    }
+}
+
+pub struct BaseKeymapSelectorDelegate {
+    view: WeakView<BaseKeymapSelector>,
+    matches: Vec<StringMatch>,
+    selected_index: usize,
+    fs: Arc<dyn Fs>,
+}
+
+impl BaseKeymapSelectorDelegate {
+    fn new(
+        weak_view: WeakView<BaseKeymapSelector>,
+        fs: Arc<dyn Fs>,
+        cx: &mut ViewContext<BaseKeymapSelector>,
+    ) -> Self {
+        let base = BaseKeymap::get(None, cx);
+        let selected_index = BaseKeymap::OPTIONS
+            .iter()
+            .position(|(_, value)| value == base)
+            .unwrap_or(0);
+        Self {
+            view: weak_view,
+            matches: Vec::new(),
+            selected_index,
+            fs,
+        }
+    }
+}
+
+impl PickerDelegate for BaseKeymapSelectorDelegate {
+    type ListItem = ui::ListItem;
+
+    fn placeholder_text(&self) -> Arc<str> {
+        "Select a base keymap...".into()
+    }
+
+    fn match_count(&self) -> usize {
+        self.matches.len()
+    }
+
+    fn selected_index(&self) -> usize {
+        self.selected_index
+    }
+
+    fn set_selected_index(
+        &mut self,
+        ix: usize,
+        _: &mut ViewContext<Picker<BaseKeymapSelectorDelegate>>,
+    ) {
+        self.selected_index = ix;
+    }
+
+    fn update_matches(
+        &mut self,
+        query: String,
+        cx: &mut ViewContext<Picker<BaseKeymapSelectorDelegate>>,
+    ) -> Task<()> {
+        let background = cx.background_executor().clone();
+        let candidates = BaseKeymap::names()
+            .enumerate()
+            .map(|(id, name)| StringMatchCandidate {
+                id,
+                char_bag: name.into(),
+                string: name.into(),
+            })
+            .collect::<Vec<_>>();
+
+        cx.spawn(|this, mut cx| async move {
+            let matches = if query.is_empty() {
+                candidates
+                    .into_iter()
+                    .enumerate()
+                    .map(|(index, candidate)| StringMatch {
+                        candidate_id: index,
+                        string: candidate.string,
+                        positions: Vec::new(),
+                        score: 0.0,
+                    })
+                    .collect()
+            } else {
+                match_strings(
+                    &candidates,
+                    &query,
+                    false,
+                    100,
+                    &Default::default(),
+                    background,
+                )
+                .await
+            };
+
+            this.update(&mut cx, |this, _| {
+                this.delegate.matches = matches;
+                this.delegate.selected_index = this
+                    .delegate
+                    .selected_index
+                    .min(this.delegate.matches.len().saturating_sub(1));
+            })
+            .log_err();
+        })
+    }
+
+    fn confirm(&mut self, _: bool, cx: &mut ViewContext<Picker<BaseKeymapSelectorDelegate>>) {
+        if let Some(selection) = self.matches.get(self.selected_index) {
+            let base_keymap = BaseKeymap::from_names(&selection.string);
+            update_settings_file::<BaseKeymap>(self.fs.clone(), cx, move |setting| {
+                *setting = Some(base_keymap)
+            });
+        }
+
+        self.view
+            .update(cx, |_, cx| {
+                cx.emit(DismissEvent);
+            })
+            .ok();
+    }
+
+    fn dismissed(&mut self, _cx: &mut ViewContext<Picker<BaseKeymapSelectorDelegate>>) {}
+
+    fn render_match(
+        &self,
+        ix: usize,
+        selected: bool,
+        _cx: &mut gpui::ViewContext<Picker<Self>>,
+    ) -> Option<Self::ListItem> {
+        let keymap_match = &self.matches[ix];
+
+        Some(
+            ListItem::new(ix)
+                .selected(selected)
+                .inset(true)
+                .child(HighlightedLabel::new(
+                    keymap_match.string.clone(),
+                    keymap_match.positions.clone(),
+                )),
+        )
+    }
+}