ui: move note and profile rendering to notedeck_ui

We want to render notes in other apps like dave, so lets move
our note rendering to notedeck_ui. We rework NoteAction so it doesn't
have anything specific to notedeck_columns

Signed-off-by: William Casarin <jb55@jb55.com>

crates/notedeck_ui/src/mention.rs

@@ -0,0 +1,107 @@
+use crate::{show_pointer, ProfilePreview};
+use egui::Sense;
+use enostr::Pubkey;
+use nostrdb::{Ndb, Transaction};
+use notedeck::{name::get_display_name, Images, NoteAction};
+
+pub struct Mention<'a> {
+    ndb: &'a Ndb,
+    img_cache: &'a mut Images,
+    txn: &'a Transaction,
+    pk: &'a [u8; 32],
+    selectable: bool,
+    size: f32,
+}
+
+impl<'a> Mention<'a> {
+    pub fn new(
+        ndb: &'a Ndb,
+        img_cache: &'a mut Images,
+        txn: &'a Transaction,
+        pk: &'a [u8; 32],
+    ) -> Self {
+        let size = 16.0;
+        let selectable = true;
+        Mention {
+            ndb,
+            img_cache,
+            txn,
+            pk,
+            selectable,
+            size,
+        }
+    }
+
+    pub fn selectable(mut self, selectable: bool) -> Self {
+        self.selectable = selectable;
+        self
+    }
+
+    pub fn size(mut self, size: f32) -> Self {
+        self.size = size;
+        self
+    }
+
+    pub fn show(self, ui: &mut egui::Ui) -> egui::InnerResponse<Option<NoteAction>> {
+        mention_ui(
+            self.ndb,
+            self.img_cache,
+            self.txn,
+            self.pk,
+            ui,
+            self.size,
+            self.selectable,
+        )
+    }
+}
+
+impl egui::Widget for Mention<'_> {
+    fn ui(self, ui: &mut egui::Ui) -> egui::Response {
+        self.show(ui).response
+    }
+}
+
+#[allow(clippy::too_many_arguments)]
+#[profiling::function]
+fn mention_ui(
+    ndb: &Ndb,
+    img_cache: &mut Images,
+    txn: &Transaction,
+    pk: &[u8; 32],
+    ui: &mut egui::Ui,
+    size: f32,
+    selectable: bool,
+) -> egui::InnerResponse<Option<NoteAction>> {
+    let link_color = ui.visuals().hyperlink_color;
+
+    ui.horizontal(|ui| {
+        let profile = ndb.get_profile_by_pubkey(txn, pk).ok();
+
+        let name: String = format!("@{}", get_display_name(profile.as_ref()).name());
+
+        let resp = ui.add(
+            egui::Label::new(egui::RichText::new(name).color(link_color).size(size))
+                .sense(Sense::click())
+                .selectable(selectable),
+        );
+
+        let note_action = if resp.clicked() {
+            show_pointer(ui);
+            Some(NoteAction::Profile(Pubkey::new(*pk)))
+        } else if resp.hovered() {
+            show_pointer(ui);
+            None
+        } else {
+            None
+        };
+
+        if let Some(rec) = profile.as_ref() {
+            resp.on_hover_ui_at_pointer(|ui| {
+                ui.set_max_width(300.0);
+                ui.add(ProfilePreview::new(rec, img_cache));
+            });
+        }
+
+        note_action
+    })
+}