split notedeck into crates

This splits notedeck into crates, separating the browser chrome and
individual apps:

* notedeck: binary file, browser chrome
* notedeck_columns: our columns app
* enostr: same as before

We still need to do more work to cleanly separate the chrome apis
from the app apis. Soon I will create notedeck-notebook to see what
makes sense to be shared between the apps.

Some obvious ones that come to mind:

1. ImageCache

We will likely want to move this to the notedeck crate, as most apps
will want some kind of image cache. In web browsers, web pages do not
need to worry about this, so we will likely have to do something similar

2. Ndb

Since NdbRef is threadsafe and Ndb is an Arc<NdbRef>, it can be safely
copied to each app. This will simplify things. In the future we might
want to create an abstraction over this? Maybe each app shouldn't have
access to the same database... we assume the data in DBs are all public
anyways, but if we have unwrapped giftwraps that could be a problem.

3. RelayPool / Subscription Manager

The browser should probably maintain these. Then apps can use ken's
high level subscription manager api and not have to worry about
connection pool details

4. Accounts

Accounts and key management should be handled by the chrome. Apps should
only have a simple signer interface.

That's all for now, just something to think about!

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

crates/notedeck_columns/src/ui/note/reply.rs

@@ -0,0 +1,135 @@
+use crate::draft::Draft;
+use crate::imgcache::ImageCache;
+use crate::notecache::NoteCache;
+use crate::ui;
+use crate::ui::note::{PostResponse, PostType};
+use enostr::{FilledKeypair, NoteId};
+use nostrdb::Ndb;
+
+pub struct PostReplyView<'a> {
+    ndb: &'a Ndb,
+    poster: FilledKeypair<'a>,
+    note_cache: &'a mut NoteCache,
+    img_cache: &'a mut ImageCache,
+    draft: &'a mut Draft,
+    note: &'a nostrdb::Note<'a>,
+    id_source: Option<egui::Id>,
+}
+
+impl<'a> PostReplyView<'a> {
+    pub fn new(
+        ndb: &'a Ndb,
+        poster: FilledKeypair<'a>,
+        draft: &'a mut Draft,
+        note_cache: &'a mut NoteCache,
+        img_cache: &'a mut ImageCache,
+        note: &'a nostrdb::Note<'a>,
+    ) -> Self {
+        let id_source: Option<egui::Id> = None;
+        PostReplyView {
+            ndb,
+            poster,
+            draft,
+            note,
+            note_cache,
+            img_cache,
+            id_source,
+        }
+    }
+
+    pub fn id_source(mut self, id: egui::Id) -> Self {
+        self.id_source = Some(id);
+        self
+    }
+
+    pub fn id(&self) -> egui::Id {
+        self.id_source
+            .unwrap_or_else(|| egui::Id::new("post-reply-view"))
+    }
+
+    pub fn show(&mut self, ui: &mut egui::Ui) -> PostResponse {
+        ui.vertical(|ui| {
+            let avail_rect = ui.available_rect_before_wrap();
+
+            // This is the offset of the post view's pfp. We use this
+            // to indent things so that the reply line is aligned
+            let pfp_offset = ui::PostView::outer_margin()
+                + ui::PostView::inner_margin()
+                + ui::ProfilePic::small_size() / 2.0;
+
+            let note_offset = pfp_offset
+                - ui::ProfilePic::medium_size() / 2.0
+                - ui::NoteView::expand_size() / 2.0;
+
+            egui::Frame::none()
+                .outer_margin(egui::Margin::same(note_offset))
+                .show(ui, |ui| {
+                    ui::NoteView::new(self.ndb, self.note_cache, self.img_cache, self.note)
+                        .actionbar(false)
+                        .medium_pfp(true)
+                        .options_button(true)
+                        .show(ui);
+                });
+
+            let id = self.id();
+            let replying_to = self.note.id();
+            let rect_before_post = ui.min_rect();
+
+            let post_response = {
+                ui::PostView::new(
+                    self.ndb,
+                    self.draft,
+                    PostType::Reply(NoteId::new(*replying_to)),
+                    self.img_cache,
+                    self.note_cache,
+                    self.poster,
+                )
+                .id_source(id)
+                .ui(self.note.txn().unwrap(), ui)
+            };
+
+            //
+            // reply line
+            //
+
+            // Position and draw the reply line
+            let mut rect = ui.min_rect();
+
+            // Position the line right above the poster's profile pic in
+            // the post box. Use the PostView's margin values to
+            // determine this offset.
+            rect.min.x = avail_rect.min.x + pfp_offset;
+
+            // honestly don't know what the fuck I'm doing here. just trying
+            // to get the line under the profile picture
+            rect.min.y = avail_rect.min.y
+                + (ui::ProfilePic::medium_size() / 2.0
+                    + ui::ProfilePic::medium_size()
+                    + ui::NoteView::expand_size() * 2.0)
+                + 1.0;
+
+            // For some reason we need to nudge the reply line's height a
+            // few more pixels?
+            let nudge = if post_response.edit_response.has_focus() {
+                // we nudge by one less pixel if focused, otherwise it
+                // overlaps the focused PostView purple border color
+                2.0
+            } else {
+                // we have to nudge by one more pixel when not focused
+                // otherwise it looks like there's a gap(?)
+                3.0
+            };
+
+            rect.max.y = rect_before_post.max.y + ui::PostView::outer_margin() + nudge;
+
+            ui.painter().vline(
+                rect.left(),
+                rect.y_range(),
+                ui.visuals().widgets.noninteractive.bg_stroke,
+            );
+
+            post_response
+        })
+        .inner
+    }
+}