notedeck

timeline.rs (8548B)

---

 use crate::actionbar::NoteAction;
 use crate::timeline::TimelineTab;
 use crate::{
     column::Columns,
     timeline::{TimelineId, ViewFilter},
     ui,
     ui::note::NoteOptions,
 };
 use egui::containers::scroll_area::ScrollBarVisibility;
 use egui::{Direction, Layout};
 use egui_tabs::TabColor;
 use nostrdb::{Ndb, Transaction};
 use notedeck::{ImageCache, NoteCache};
 use tracing::{error, warn};
 
 pub struct TimelineView<'a> {
     timeline_id: TimelineId,
     columns: &'a mut Columns,
     ndb: &'a Ndb,
     note_cache: &'a mut NoteCache,
     img_cache: &'a mut ImageCache,
     note_options: NoteOptions,
     reverse: bool,
 }
 
 impl<'a> TimelineView<'a> {
     pub fn new(
         timeline_id: TimelineId,
         columns: &'a mut Columns,
         ndb: &'a Ndb,
         note_cache: &'a mut NoteCache,
         img_cache: &'a mut ImageCache,
         note_options: NoteOptions,
     ) -> TimelineView<'a> {
         let reverse = false;
         TimelineView {
             ndb,
             timeline_id,
             columns,
             note_cache,
             img_cache,
             reverse,
             note_options,
         }
     }
 
     pub fn ui(&mut self, ui: &mut egui::Ui) -> Option<NoteAction> {
         timeline_ui(
             ui,
             self.ndb,
             self.timeline_id,
             self.columns,
             self.note_cache,
             self.img_cache,
             self.reverse,
             self.note_options,
         )
     }
 
     pub fn reversed(mut self) -> Self {
         self.reverse = true;
         self
     }
 }
 
 #[allow(clippy::too_many_arguments)]
 fn timeline_ui(
     ui: &mut egui::Ui,
     ndb: &Ndb,
     timeline_id: TimelineId,
     columns: &mut Columns,
     note_cache: &mut NoteCache,
     img_cache: &mut ImageCache,
     reversed: bool,
     note_options: NoteOptions,
 ) -> Option<NoteAction> {
     //padding(4.0, ui, |ui| ui.heading("Notifications"));
     /*
     let font_id = egui::TextStyle::Body.resolve(ui.style());
     let row_height = ui.fonts(|f| f.row_height(&font_id)) + ui.spacing().item_spacing.y;
 
     */
 
     let scroll_id = {
         let timeline = if let Some(timeline) = columns.find_timeline_mut(timeline_id) {
             timeline
         } else {
             error!("tried to render timeline in column, but timeline was missing");
             // TODO (jb55): render error when timeline is missing?
             // this shouldn't happen...
             return None;
         };
 
         timeline.selected_view = tabs_ui(ui, timeline.selected_view, &timeline.views);
 
         // need this for some reason??
         ui.add_space(3.0);
 
         egui::Id::new(("tlscroll", timeline.view_id()))
     };
 
     egui::ScrollArea::vertical()
         .id_salt(scroll_id)
         .animated(false)
         .auto_shrink([false, false])
         .scroll_bar_visibility(ScrollBarVisibility::AlwaysVisible)
         .show(ui, |ui| {
             let timeline = if let Some(timeline) = columns.find_timeline_mut(timeline_id) {
                 timeline
             } else {
                 error!("tried to render timeline in column, but timeline was missing");
                 // TODO (jb55): render error when timeline is missing?
                 // this shouldn't happen...
                 return None;
             };
 
             let txn = Transaction::new(ndb).expect("failed to create txn");
             TimelineTabView::new(
                 timeline.current_view(),
                 reversed,
                 note_options,
                 &txn,
                 ndb,
                 note_cache,
                 img_cache,
             )
             .show(ui)
         })
         .inner
 }
 
 pub fn tabs_ui(ui: &mut egui::Ui, selected: usize, views: &[TimelineTab]) -> usize {
     ui.spacing_mut().item_spacing.y = 0.0;
 
     let tab_res = egui_tabs::Tabs::new(views.len() as i32)
         .selected(selected as i32)
         .hover_bg(TabColor::none())
         .selected_fg(TabColor::none())
         .selected_bg(TabColor::none())
         .hover_bg(TabColor::none())
         //.hover_bg(TabColor::custom(egui::Color32::RED))
         .height(32.0)
         .layout(Layout::centered_and_justified(Direction::TopDown))
         .show(ui, |ui, state| {
             ui.spacing_mut().item_spacing.y = 0.0;
 
             let ind = state.index();
 
             let txt = match views[ind as usize].filter {
                 ViewFilter::Notes => "Notes",
                 ViewFilter::NotesAndReplies => "Notes & Replies",
             };
 
             let res = ui.add(egui::Label::new(txt).selectable(false));
 
             // underline
             if state.is_selected() {
                 let rect = res.rect;
                 let underline =
                     shrink_range_to_width(rect.x_range(), get_label_width(ui, txt) * 1.15);
                 let underline_y = ui.painter().round_to_pixel(rect.bottom()) - 1.5;
                 return (underline, underline_y);
             }
 
             (egui::Rangef::new(0.0, 0.0), 0.0)
         });
 
     //ui.add_space(0.5);
     ui::hline(ui);
 
     let sel = tab_res.selected().unwrap_or_default();
 
     let (underline, underline_y) = tab_res.inner()[sel as usize].inner;
     let underline_width = underline.span();
 
     let tab_anim_id = ui.id().with("tab_anim");
     let tab_anim_size = tab_anim_id.with("size");
 
     let stroke = egui::Stroke {
         color: ui.visuals().hyperlink_color,
         width: 2.0,
     };
 
     let speed = 0.1f32;
 
     // animate underline position
     let x = ui
         .ctx()
         .animate_value_with_time(tab_anim_id, underline.min, speed);
 
     // animate underline width
     let w = ui
         .ctx()
         .animate_value_with_time(tab_anim_size, underline_width, speed);
 
     let underline = egui::Rangef::new(x, x + w);
 
     ui.painter().hline(underline, underline_y, stroke);
 
     sel as usize
 }
 
 fn get_label_width(ui: &mut egui::Ui, text: &str) -> f32 {
     let font_id = egui::FontId::default();
     let galley = ui.fonts(|r| r.layout_no_wrap(text.to_string(), font_id, egui::Color32::WHITE));
     galley.rect.width()
 }
 
 fn shrink_range_to_width(range: egui::Rangef, width: f32) -> egui::Rangef {
     let midpoint = (range.min + range.max) / 2.0;
     let half_width = width / 2.0;
 
     let min = midpoint - half_width;
     let max = midpoint + half_width;
 
     egui::Rangef::new(min, max)
 }
 
 pub struct TimelineTabView<'a> {
     tab: &'a TimelineTab,
     reversed: bool,
     note_options: NoteOptions,
     txn: &'a Transaction,
     ndb: &'a Ndb,
     note_cache: &'a mut NoteCache,
     img_cache: &'a mut ImageCache,
 }
 
 impl<'a> TimelineTabView<'a> {
     pub fn new(
         tab: &'a TimelineTab,
         reversed: bool,
         note_options: NoteOptions,
         txn: &'a Transaction,
         ndb: &'a Ndb,
         note_cache: &'a mut NoteCache,
         img_cache: &'a mut ImageCache,
     ) -> Self {
         Self {
             tab,
             reversed,
             txn,
             note_options,
             ndb,
             note_cache,
             img_cache,
         }
     }
 
     pub fn show(&mut self, ui: &mut egui::Ui) -> Option<NoteAction> {
         let mut action: Option<NoteAction> = None;
         let len = self.tab.notes.len();
 
         self.tab
             .list
             .clone()
             .borrow_mut()
             .ui_custom_layout(ui, len, |ui, start_index| {
                 ui.spacing_mut().item_spacing.y = 0.0;
                 ui.spacing_mut().item_spacing.x = 4.0;
 
                 let ind = if self.reversed {
                     len - start_index - 1
                 } else {
                     start_index
                 };
 
                 let note_key = self.tab.notes[ind].key;
 
                 let note = if let Ok(note) = self.ndb.get_note_by_key(self.txn, note_key) {
                     note
                 } else {
                     warn!("failed to query note {:?}", note_key);
                     return 0;
                 };
 
                 ui::padding(8.0, ui, |ui| {
                     let resp = ui::NoteView::new(self.ndb, self.note_cache, self.img_cache, &note)
                         .note_options(self.note_options)
                         .show(ui);
 
                     if let Some(note_action) = resp.action {
                         action = Some(note_action)
                     }
 
                     if let Some(context) = resp.context_selection {
                         context.process(ui, &note);
                     }
                 });
 
                 ui::hline(ui);
                 //ui.add(egui::Separator::default().spacing(0.0));
 
                 1
             });
 
         action
     }
 }