working on tab... checkpoint

src/main.rs

@@ -1,4 +1,7 @@
 #![feature(iter_map_windows)]
+use iced::keyboard::key::Named;
+use iced::keyboard::{Key, Modifiers};
+use iced::{event, task, Event, Subscription};
 use iced::widget::scrollable;
 use iced::{
     Element, Length, Task, Theme, clipboard, color,
@@ -43,32 +46,14 @@ fn main() -> iced::Result {
         }
     }
 
-    // ALL BUILTIN THEMES
+    // THEMES
-    //    Light
+    //    Dark - KanagawaDragon
-    //    Dark
+    //    Default - Nord
-    //    Dracula
+    //    Light - TokyoNightLight
-    //    Nord
-    //    SolarizedLight
-    //    SolarizedDark
-    //    GruvboxLight
-    //    GruvboxDark
-    //    CatppuccinLatte
-    //    CatppuccinFrappe
-    //    CatppuccinMacchiato
-    //    CatppuccinMocha
-    //    TokyoNight
-    //    TokyoNightStorm
-    //    TokyoNightLight
-    //    KanagawaWave
-    //    KanagawaDragon
-    //    KanagawaLotus
-    //    Moonfly
-    //    Nightfly
-    //    Oxocarbon
-    //    Ferra
 
     // GUI
     iced::application("Bible Study", State::update, State::view)
+        .subscription(State::subscription)
         .theme(|_| Theme::Nord)
         .run()
 }
@@ -85,6 +70,10 @@ enum Message {
     QuickSearch(usize, String, usize),
     AddColRight,
     DeleteColumn(usize),
+    ErrorSelectingBible(usize),
+    RecievedEvent(Event),
+    ColSelected(usize),
+    ColUnselected,
 }
 
 struct ColState {
@@ -96,6 +85,8 @@ struct ColState {
 
     word_search: String,
     word_search_results: Option<Vec<(String, bool)>>,
+
+    error: Option<String>,
 }
 
 impl Default for ColState {
@@ -109,6 +100,41 @@ impl Default for ColState {
 
             word_search: String::new(),
             word_search_results: None,
+
+            error: None,
+        }
+    }
+}
+
+#[derive(PartialEq, Eq)]
+enum SelectedInputBox {
+    Bible,
+    VerseSearch,
+    WordSearch,
+}
+impl SelectedInputBox {
+    fn in_order() -> Vec<Self> {
+        vec![
+            SelectedInputBox::Bible,
+            SelectedInputBox::VerseSearch,
+            SelectedInputBox::WordSearch
+            ]
+    }
+    fn next(current: &Option<Self>) -> Self {
+        if let Some(input) = current {
+            if let Some(found) = Self::in_order().into_iter().find(|a| a==input) {
+                return found
+            } 
+        }
+        // I don't see why this would panic
+        Self::in_order().into_iter().next().unwrap()
+    }
+    fn as_id_prefix(&self) -> &str {
+        // magic values that relate to id() as setup in the GUI
+        match self {
+            SelectedInputBox::Bible => "",
+            SelectedInputBox::VerseSearch => "verse-",
+            SelectedInputBox::WordSearch => "word-",
         }
     }
 }
@@ -117,6 +143,9 @@ struct State {
     files: combo_box::State<String>,
     states: Vec<ColState>,
     cols: usize,
+    /// Incase an event needs a best guess column
+    last_selected_column: Option<usize>,
+    last_selected_input: Option<SelectedInputBox>
 }
 
 impl Default for State {
@@ -147,13 +176,74 @@ impl Default for State {
             files: combo_box::State::new(files),
             states: vec![ColState::default()],
             cols: 1,
+            last_selected_column: None,
+            last_selected_input: None,
         }
     }
 }
 
 impl State {
+
+    fn subscription(&self) -> Subscription<Message> {
+        event::listen().map(Message::RecievedEvent)
+    }
+
     fn update(&mut self, msg: Message) -> Task<Message> {
+        // handle tab ordering
         match msg {
+            Message::WordSearchInput(_, _) => self.last_selected_input = Some(SelectedInputBox::WordSearch),
+            Message::BibleSearchInput(_, _) => self.last_selected_input = Some(SelectedInputBox::VerseSearch),
+            Message::DeleteColumn(_) => self.last_selected_input = None,
+            _ => {}
+        }
+
+        // try to set last_selected_column for messages with side effects
+        match msg {
+            // All events that give column index
+            Message::ErrorSelectingBible(i) |
+            Message::BibleSelected(i, _) |
+            Message::QuickSearch(i, _, _) |
+            Message::BibleSearchInput(i,_) |
+            Message::WordSearchInput(i, _) |
+            Message::BibleSearchSubmit(i) |
+            Message::SubmitWordSearch(i) |
+            Message::CopyText(i) |
+            Message::Clear(i)
+            => self.last_selected_column = Some(i),
+            Message::DeleteColumn(_) => self.last_selected_column = None,
+            _ => {}
+        }
+
+        // match normal messages
+        match msg {
+            Message::ColSelected(i) => self.last_selected_column = Some(i),
+            Message::ColUnselected => self.last_selected_column = None,
+            Message::RecievedEvent(event) => {
+                if let Event::Keyboard(kbd) =event {
+                    if let iced::keyboard::Event::KeyReleased {key, modifiers, ..} = kbd {
+                        if let Key::Named(n) = key {
+                            if let Named::Tab = n {
+                                if let Some(i) = self.last_selected_column {
+                                    if modifiers == Modifiers::SHIFT {
+                                        // Shirft + Tab
+                                        let next = SelectedInputBox::next(&self.last_selected_input);
+                                        let id = next.as_id_prefix(); 
+                                        return text_input::focus(format!("{id}{}", i));
+                                    } else {
+                                        // Tab
+
+                                        // TODO prev
+                                        return text_input::focus(format!("verse-{}", i));
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            Message::ErrorSelectingBible(i) => {
+                self.states[i].error = Some(String::new());
+            }
             Message::DeleteColumn(idx) => {
                 self.cols -= 1;
                 self.states.remove(idx);
@@ -165,8 +255,10 @@ impl State {
                 self.states.push(ColState::default())
             }
             Message::BibleSelected(i, file) => {
-                if let Ok(contents) = fs::read_to_string(&file) {
+                match fs::read_to_string(&file) {
-                    if let Ok(bible) = quick_xml::de::from_str::<bible::Bible>(&contents) {
+                    Ok(contents) => {
+                        match quick_xml::de::from_str::<bible::Bible>(&contents) {
+                            Ok(bible)  => {
                                 // State is held technically in this variable, although
                                 // the Bible is held in memory in it's own variable.
                                 self.states[i].selected_file = Some(format!("{bible}"));
@@ -174,6 +266,16 @@ impl State {
                                 // automatically focus the search bar when done here
                                 // return text_input::focus("bible-search");
                             }
+                            Err(err) => {
+                                eprintln!("{}", err);
+                                return self.update(Message::ErrorSelectingBible(i));
+                            },
+                        }
+                    },
+                    Err(err) => {
+                        eprintln!("{}", err);
+                        return self.update(Message::ErrorSelectingBible(i));
+                    }
                 }
             }
             Message::QuickSearch(i, s, result_index) => {
@@ -184,8 +286,12 @@ impl State {
                 }
                 return self.update(Message::BibleSearchSubmit(i));
             }
-            Message::BibleSearchInput(i, query) => self.states[i].bible_search = query,
+            Message::BibleSearchInput(i, query) => {
-            Message::WordSearchInput(i, query) => self.states[i].word_search = query,
+                self.states[i].bible_search = query
+            },
+            Message::WordSearchInput(i, query) => {
+                self.states[i].word_search = query
+            },
             Message::BibleSearchSubmit(i) => {
                 let mut splits = self.states[i].bible_search.split_whitespace();
                 let book = splits.next();
@@ -218,13 +324,13 @@ impl State {
                 self.states[i].word_search_results = None;
                 self.states[i].bible_search = String::new();
                 self.states[i].word_search = String::new();
-                // return text_input::focus("bible-search");
             }
         };
         Task::none()
     }
 
     fn view(&self) -> Element<Message> {
+        //TODO error message
         scrollable(
             row![
                 row((0..self.cols).map(|col_index| {
@@ -239,14 +345,17 @@ impl State {
                             "Select Bible",
                             self.states[col_index].selected_file.as_ref(),
                             move |s| Message::BibleSelected(col_index, s)
-                        ),
+                        )
+                        .on_open(Message::ColSelected(col_index)),
                         text_input(
                             "Search query, ie: Gen 1:1",
                             &self.states[col_index].bible_search
                         )
+                        .id(format!("verse-{}", col_index))
                         .on_input(move |s| Message::BibleSearchInput(col_index, s))
                         .on_submit(Message::BibleSearchSubmit(col_index)),
                         widget::text_input("Word Search", &self.states[col_index].word_search)
+                            .id(format!("word-{}", col_index))
                             .on_input(move |s| Message::WordSearchInput(col_index, s))
                             .on_submit(Message::SubmitWordSearch(col_index)),
                         row![