updating tests, adding scroll for title popup, refactoring

src/lib.rs

@@ -29,3 +29,4 @@ pub fn get_save_backup_file_path() -> PathBuf {
 pub const ORANGE: ratatui::style::Color = ratatui::style::Color::Rgb(255, 165, 0);
 pub const DAEMONIZE_ARG: &str = "__thoth_copy_daemonize";
 pub const MIN_TEXTAREA_HEIGHT: usize = 3;
+pub const BORDER_PADDING_SIZE: usize = 2;

src/scrollable_textarea.rs

@@ -5,7 +5,7 @@ use std::{
     rc::Rc,
 };
 
-use crate::{EditorClipboard, MIN_TEXTAREA_HEIGHT};
+use crate::{EditorClipboard, BORDER_PADDING_SIZE, MIN_TEXTAREA_HEIGHT};
 use crate::{MarkdownRenderer, ORANGE};
 use anyhow;
 use anyhow::Result;
@@ -173,7 +173,7 @@ impl ScrollableTextArea {
 
     pub fn move_focus(&mut self, direction: isize) {
         let new_index = self.focused_index as isize + direction;
-        if new_index > (self.textareas.len()) as isize {
+        if new_index >= (self.textareas.len()) as isize {
             self.focused_index = 0;
         } else if new_index < 0 {
             self.focused_index = self.textareas.len() - 1;
@@ -190,10 +190,10 @@ impl ScrollableTextArea {
             let mut height_sum = 0;
             for i in self.scroll..=self.focused_index {
                 let textarea_height =
-                    self.textareas[i].lines().len().max(MIN_TEXTAREA_HEIGHT) as u16 + 2;
+                    self.textareas[i].lines().len().max(MIN_TEXTAREA_HEIGHT) + BORDER_PADDING_SIZE;
                 height_sum += textarea_height;
 
-                if height_sum > self.viewport_height {
+                if height_sum > self.viewport_height as usize {
                     self.scroll = i;
                     break;
                 }
@@ -210,7 +210,7 @@ impl ScrollableTextArea {
     pub fn calculate_height_to_focused(&self) -> u16 {
         self.textareas[self.scroll..=self.focused_index]
             .iter()
-            .map(|ta| ta.lines().len().max(MIN_TEXTAREA_HEIGHT) as u16 + 2)
+            .map(|ta| (ta.lines().len().max(MIN_TEXTAREA_HEIGHT) + BORDER_PADDING_SIZE) as u16)
             .sum()
     }
 
@@ -283,7 +283,7 @@ impl ScrollableTextArea {
                     break;
                 }
 
-                let content_height = textarea.lines().len() as u16 + 2;
+                let content_height = (textarea.lines().len() + BORDER_PADDING_SIZE) as u16;
                 let is_focused = i == self.focused_index;
                 let is_editing = is_focused && self.edit_mode;
 
@@ -344,7 +344,7 @@ impl ScrollableTextArea {
                     let rendered_markdown = self.markdown_cache.borrow_mut().get_or_render(
                         &content,
                         title,
-                        f.size().width as usize - 2,
+                        f.size().width as usize - BORDER_PADDING_SIZE,
                     )?;
                     let paragraph = Paragraph::new(rendered_markdown)
                         .block(block)
@@ -408,7 +408,7 @@ impl ScrollableTextArea {
         let rendered_markdown = self.markdown_cache.borrow_mut().get_or_render(
             &content,
             title,
-            f.size().width as usize - 2,
+            f.size().width as usize - BORDER_PADDING_SIZE,
         )?;
 
         let paragraph = Paragraph::new(rendered_markdown)
@@ -452,11 +452,14 @@ mod tests {
     fn test_move_focus() {
         let mut sta = create_test_textarea();
         sta.add_textarea(TextArea::default(), "Test1".to_string());
+        assert_eq!(sta.focused_index, 0);
         sta.add_textarea(TextArea::default(), "Test2".to_string());
-        sta.move_focus(1);
+
         assert_eq!(sta.focused_index, 1);
-        sta.move_focus(-1);
+        sta.move_focus(1);
         assert_eq!(sta.focused_index, 0);
+        sta.move_focus(-1);
+        assert_eq!(sta.focused_index, 1);
     }
 
     #[test]

src/title_select_popup.rs

@@ -2,6 +2,7 @@ pub struct TitleSelectPopup {
     pub titles: Vec<String>,
     pub selected_index: usize,
     pub visible: bool,
+    pub scroll_offset: usize,
 }
 
 impl TitleSelectPopup {
@@ -10,6 +11,47 @@ impl TitleSelectPopup {
             titles: Vec::new(),
             selected_index: 0,
             visible: false,
+            scroll_offset: 0,
+        }
+    }
+
+    pub fn move_selection_up(&mut self, visible_items: usize) {
+        if self.titles.is_empty() {
+            return;
+        }
+
+        if self.selected_index > 0 {
+            self.selected_index -= 1;
+        } else {
+            self.selected_index = self.titles.len() - 1;
+        }
+
+        if self.selected_index < self.scroll_offset {
+            self.scroll_offset = self.selected_index;
+        }
+        if self.selected_index == self.titles.len() - 1 {
+            self.scroll_offset = self.titles.len().saturating_sub(visible_items);
+        }
+    }
+
+    pub fn move_selection_down(&mut self, visible_items: usize) {
+        if self.titles.is_empty() {
+            return;
+        }
+
+        if self.selected_index < self.titles.len() - 1 {
+            self.selected_index += 1;
+        } else {
+            self.selected_index = 0;
+            self.scroll_offset = 0;
+        }
+
+        let max_scroll = self.titles.len().saturating_sub(visible_items);
+        if self.selected_index >= self.scroll_offset + visible_items {
+            self.scroll_offset = (self.selected_index + 1).saturating_sub(visible_items);
+            if self.scroll_offset > max_scroll {
+                self.scroll_offset = max_scroll;
+            }
         }
     }
 }
@@ -40,4 +82,20 @@ mod tests {
         assert_eq!(popup.titles[0], "Title1");
         assert_eq!(popup.titles[1], "Title2");
     }
+
+    #[test]
+    fn test_wrap_around_selection() {
+        let mut popup = TitleSelectPopup::new();
+        popup.titles = vec!["1".to_string(), "2".to_string(), "3".to_string()];
+
+        popup.selected_index = 0;
+        popup.move_selection_up(2);
+        assert_eq!(popup.selected_index, 2);
+        assert_eq!(popup.scroll_offset, 1);
+
+        popup.selected_index = 2;
+        popup.move_selection_down(2);
+        assert_eq!(popup.selected_index, 0);
+        assert_eq!(popup.scroll_offset, 0);
+    }
 }

src/ui.rs

@@ -1,4 +1,4 @@
-use crate::{TitlePopup, TitleSelectPopup, ORANGE};
+use crate::{TitlePopup, TitleSelectPopup, BORDER_PADDING_SIZE, ORANGE};
 use ratatui::{
     layout::{Constraint, Direction, Layout, Rect},
     style::{Color, Modifier, Style},
@@ -67,7 +67,7 @@ pub fn render_edit_commands_popup(f: &mut Frame) {
         Cell::from("MAPPINGS").style(Style::default().fg(ORANGE).add_modifier(Modifier::BOLD)),
         Cell::from("DESCRIPTIONS").style(Style::default().fg(ORANGE).add_modifier(Modifier::BOLD)),
     ])
-    .height(2);
+    .height(BORDER_PADDING_SIZE as u16);
 
     let commands: Vec<Row> = vec![
         Row::new(vec![
@@ -105,7 +105,7 @@ pub fn render_edit_commands_popup(f: &mut Frame) {
         .header(header)
         .block(block)
         .widths([Constraint::Percentage(30), Constraint::Percentage(70)])
-        .column_spacing(2)
+        .column_spacing(BORDER_PADDING_SIZE as u16)
         .highlight_style(Style::default().fg(Color::Yellow))
         .highlight_symbol(">> ");
 
@@ -149,7 +149,7 @@ pub fn render_header(f: &mut Frame, area: Rect, is_edit_mode: bool) {
 
     let thoth_width = thoth.width();
     let separator_width = separator.width();
-    let reserved_width = thoth_width + 2; // 2 extra spaces for padding
+    let reserved_width = thoth_width + BORDER_PADDING_SIZE; // 2 extra spaces for padding
 
     let mut display_commands = Vec::new();
     let mut current_width = 0;
@@ -166,7 +166,7 @@ pub fn render_header(f: &mut Frame, area: Rect, is_edit_mode: bool) {
     let command_string = display_commands.join(separator);
     let command_width = command_string.width();
 
-    let padding = " ".repeat(available_width - command_width - thoth_width - 2);
+    let padding = " ".repeat(available_width - command_width - thoth_width - BORDER_PADDING_SIZE);
 
     let header = Line::from(vec![
         Span::styled(command_string, Style::default().fg(ORANGE)),
@@ -200,12 +200,18 @@ pub fn render_title_select_popup(f: &mut Frame, popup: &TitleSelectPopup) {
     let area = centered_rect(80, 80, f.size());
     f.render_widget(ratatui::widgets::Clear, area);
 
-    let items: Vec<Line> = popup
-        .titles
+    let visible_height = area.height.saturating_sub(BORDER_PADDING_SIZE as u16) as usize;
+
+    let start_idx = popup.scroll_offset;
+    let end_idx = (popup.scroll_offset + visible_height).min(popup.titles.len());
+    let visible_titles = &popup.titles[start_idx..end_idx];
+
+    let items: Vec<Line> = visible_titles
         .iter()
         .enumerate()
         .map(|(i, title)| {
-            if i == popup.selected_index {
+            let absolute_idx = i + popup.scroll_offset;
+            if absolute_idx == popup.selected_index {
                 Line::from(vec![Span::styled(
                     format!("> {}", title),
                     Style::default().fg(Color::Yellow),
@@ -219,7 +225,7 @@ pub fn render_title_select_popup(f: &mut Frame, popup: &TitleSelectPopup) {
     let block = Block::default()
         .borders(Borders::ALL)
         .border_style(Style::default().fg(ORANGE))
-        .title("Select Title");
+        .title(format!("Select Title"));
 
     let paragraph = Paragraph::new(items)
         .block(block)
@@ -374,6 +380,7 @@ mod tests {
             titles: vec!["Title1".to_string(), "Title2".to_string()],
             selected_index: 0,
             visible: true,
+            scroll_offset: 0,
         };
 
         terminal

src/ui_handler.rs

@@ -1,4 +1,4 @@
-use crate::{get_save_backup_file_path, EditorClipboard};
+use crate::{get_save_backup_file_path, EditorClipboard, BORDER_PADDING_SIZE};
 use anyhow::{bail, Result};
 use crossterm::{
     event::{self, DisableMouseCapture, EnableMouseCapture, KeyCode, KeyModifiers},
@@ -238,6 +238,15 @@ fn handle_title_popup_input(state: &mut UIState, key: event::KeyEvent) -> Result
 }
 
 fn handle_title_select_popup_input(state: &mut UIState, key: event::KeyEvent) -> Result<bool> {
+    // Subtract 2 from viewport height to account for the top and bottom borders
+    // drawn by Block::default().borders(Borders::ALL) in ui.rs render_title_select_popup.
+    // The borders are rendered using unicode box-drawing characters:
+    // top border    : ┌───┐
+    // bottom border : └───┘
+    // let visible_items = state.scrollable_textarea.viewport_height.saturating_sub(2) as usize;
+    let visible_items = (state.scrollable_textarea.viewport_height as f32 * 0.8).floor() as usize
+        - BORDER_PADDING_SIZE;
+
     match key.code {
         KeyCode::Enter => {
             state
@@ -250,18 +259,10 @@ fn handle_title_select_popup_input(state: &mut UIState, key: event::KeyEvent) ->
             state.edit_commands_popup.visible = false;
         }
         KeyCode::Up => {
-            if state.title_select_popup.selected_index > 0 {
-                state.title_select_popup.selected_index -= 1;
-            } else {
-                state.title_select_popup.selected_index = state.title_select_popup.titles.len() - 1
-            }
+            state.title_select_popup.move_selection_up(visible_items);
         }
         KeyCode::Down => {
-            if state.title_select_popup.selected_index < state.title_select_popup.titles.len() - 1 {
-                state.title_select_popup.selected_index += 1;
-            } else {
-                state.title_select_popup.selected_index = 0;
-            }
+            state.title_select_popup.move_selection_down(visible_items);
         }
         _ => {}
     }

tests/integration_tests.rs

@@ -21,8 +21,10 @@ fn test_full_application_flow() {
 
     // Test focus movement
     sta.move_focus(1);
-    assert_eq!(sta.focused_index, 1);
+    assert_eq!(sta.focused_index, 0);
     sta.move_focus(-1);
+    assert_eq!(sta.focused_index, 1);
+    sta.move_focus(1);
     assert_eq!(sta.focused_index, 0);
 
     // Test title change