5 warnings

src/app.rs

@@ -1,29 +1,31 @@
-use crossterm::event::Event;
+use crossterm::event::{
-use crossterm::event::{self, KeyCode, KeyEvent, KeyEventKind, KeyModifiers, MouseEvent};
+    self, Event, KeyCode, KeyEvent, KeyEventKind, KeyModifiers, MouseEvent, MouseEventKind,
-use ratatui::text::{ToLine, ToSpan};
+};
-use ratatui::widgets::Clear;
 use ratatui::{
     Frame, Terminal,
-    layout::{Constraint, Layout, Spacing},
+    layout::{Constraint, Layout, Position, Rect, Size, Spacing},
     prelude::Backend,
     style::{Style, Stylize},
-    text::{Line, Span, Text},
+    text::{Line, Span, Text, ToLine, ToSpan},
-    widgets::{Block, BorderType, Padding, Paragraph},
+    widgets::{Block, BorderType, Clear, Padding, Paragraph, Wrap},
 };
 use ratatui_explorer::{FileExplorer, Input};
-use std::io::{BufRead, BufReader};
-use std::path::Path;
 use std::{
     fmt::Debug,
     fs::File,
-    io::{self},
+    io::{self, BufRead, BufReader},
-    path::PathBuf,
+    path::{Path, PathBuf},
 };
 
+#[derive(Default)]
 pub struct DocCache {
     content: String,
+    /// height - width. up down first, left right second.
     offset: (u16, u16),
-    length_hint: u16,
+    /// same format as offset
+    screen: Rect,
+    /// is also lines - max len, which means height width.
+    length_hint: (u16, u16),
 }
 pub struct Doc {
     doc: PathBuf,
@@ -95,6 +97,23 @@ impl<'a> App<'a> {
     }
 }
 
+#[derive(Debug, PartialEq, Eq, Clone)]
+enum TextScroll {
+    UpOne,
+    DownOne,
+    UpHalf,
+    DownHalf,
+    UpFull,
+    DownFull,
+    Up(u16),
+    Down(u16),
+    // not when i Wrap.
+    Left(u16),
+    Right(u16),
+    LeftOne,
+    RightOne,
+}
+
 #[derive(Debug, Default, PartialEq, Eq, Clone)]
 enum Message {
     #[default]
@@ -105,7 +124,7 @@ enum Message {
     DocSwitcherAction(Input),
     /// close doc switcher because there is a new file coming
     NewDoc,
-    TextScroll(Option<bool>, Option<bool>),
+    TextScroll(TextScroll),
 }
 impl App<'_> {
     pub fn run<B: Backend>(&mut self, term: &mut Terminal<B>) -> io::Result<()> {
@@ -118,7 +137,7 @@ impl App<'_> {
         }
         Ok(())
     }
-    fn view(&self, frame: &mut Frame) {
+    fn view(&mut self, frame: &mut Frame) {
         frame.render_widget(Clear, frame.area()); // tf this about
 
         let [header, main, foot] = Layout::vertical([
@@ -142,6 +161,14 @@ impl App<'_> {
             Span::from("lda").style(Style::new().fg(ratatui::style::Color::Indexed(202)));
         frame.render_widget(lda_text, lda);
         let content_block = Block::bordered().title(Line::from(" file content ").left_aligned());
+        // NOOOO this is only reason self is mut
+        if let Some(Doc {
+            cache: Some(DocCache { ref mut screen, .. }),
+            ..
+        }) = self.doc
+        {
+            *screen = content_block.inner(main);
+        }
 
         let mut file_name = Text::default().blue().centered();
         let content;
@@ -150,7 +177,9 @@ impl App<'_> {
             file_name.push_span(doc.doc.display().to_string());
             if let Some(cache) = &doc.cache {
                 let text = Text::from(cache.content.as_str());
-                content = Paragraph::new(text).scroll(cache.offset);
+                content = Paragraph::new(text)
+                    .wrap(Wrap { trim: false })
+                    .scroll(cache.offset); // pronblem
             } else {
                 content = Paragraph::new("errored buhhhhhh".to_line().centered())
             }
@@ -162,10 +191,14 @@ impl App<'_> {
         frame.render_widget(header_box, header);
         frame.render_widget(content, main);
         frame.render_widget(
-            Line::from_iter([
+            {
-                Span::from("enter to choose file, "),
+                let mut line = Line::default();
-                Span::from("esc or q to quit"),
+                if self.explorer.is_some() {
-            ]),
+                    line.push_span(Span::from("enter to choose file, "));
+                };
+                line.push_span(Span::from("esc or q to quit"));
+                line
+            },
             foot,
         );
         {
@@ -232,7 +265,11 @@ impl App<'_> {
                     Err(_e) => self.state = AppState::FileError,
                 };
             }
-            Message::OpenDocSwitcher => self.state = AppState::DocSwitcher,
+            Message::OpenDocSwitcher => {
+                if self.explorer.is_some() {
+                    self.state = AppState::DocSwitcher
+                };
+            }
             Message::NewDoc => {
                 let Some(ref mut expl) = self.explorer else {
                     // no way bro doesnt have this and then close doc
@@ -250,6 +287,9 @@ impl App<'_> {
                     {
                         self.doc = Some(Doc::new(file_name));
                         return Some(Message::ReloadDoc);
+                    } else if let Some(Doc { cache: None, .. }) = self.doc {
+                        self.state = AppState::FileError;
+                        return None;
                     }
                 }
                 return Some(Message::Main);
@@ -280,20 +320,21 @@ impl App<'_> {
                 }; // noooo
             }
 
-            Message::TextScroll(up, right) => {
+            Message::TextScroll(thing) => {
-                if let Some(ref mut doc) = self.doc {
+                if let Some(Doc {
-                    if let Some(up) = up {
+                    cache: Some(ref mut cache),
-                        let bij = if up { -1 } else { 1 }; // fuck is this about
+                    ..
-                        if let Some(ref mut cache) = doc.cache {
+                }) = self.doc
-                            cache.offset.0 = cache.offset.0.saturating_add_signed(bij);
+                && !matches!(
-                        }
+                        // disabled here
-                    };
+                        thing,
-                    if let Some(right) = right {
+                        TextScroll::Left(_)
-                        let bij = if right { 1 } else { -1 };
+                            | TextScroll::Right(_)
-                        if let Some(ref mut cache) = doc.cache {
+                            | TextScroll::LeftOne
-                            cache.offset.1 = cache.offset.1.saturating_add_signed(bij);
+                            | TextScroll::RightOne
-                        }
+                    )
-                    };
+                {
+                    cache.update_scroll(thing);
                 }
             }
         };
@@ -336,7 +377,13 @@ impl App<'_> {
 
                     Ok(None)
                 }
-                _ => match ev {
+                _ => {
+                    macro_rules! osScroll {
+                        ($this:expr) => {
+                            Ok(Some(Message::TextScroll($this)))
+                        };
+                    }
+                    match ev {
                         event::Event::Key(KeyEvent {
                             code,
                             modifiers,
@@ -346,6 +393,7 @@ impl App<'_> {
                             if kind == KeyEventKind::Release {
                                 return Ok(None);
                             }
+
                             if code == KeyCode::Char('q') || code == KeyCode::Esc {
                                 return Ok(Some(Message::Quit));
                             } else if code == KeyCode::Char('r')
@@ -357,44 +405,84 @@ impl App<'_> {
                             }
                             // no what is this code block
                             if self.doc.is_some() {
-                            let updown = tri_state(
+                                match code {
-                                code.is_up() || code.is_char('k'),
+                                    KeyCode::Up | KeyCode::Char('k') => {
-                                code.is_down() || code.is_char('j'),
+                                        return osScroll!(TextScroll::UpOne);
-                            );
+                                    }
-                            let leftright = tri_state(
+                                    KeyCode::Down | KeyCode::Char('j') => {
-                                code.is_right() || code.is_char('l'),
+                                        return osScroll!(TextScroll::DownOne);
-                                code.is_left() || code.is_char('h'),
+                                    }
-                            );
+                                    KeyCode::Right | KeyCode::Char('l') => {
-                            return Ok(Some(Message::TextScroll(updown, leftright)));
+                                        return osScroll!(TextScroll::RightOne);
+                                    }
+                                    KeyCode::Left | KeyCode::Char('h') => {
+                                        return osScroll!(TextScroll::LeftOne);
+                                    }
+                                    KeyCode::Char('u') => return osScroll!(TextScroll::UpHalf),
+                                    KeyCode::Char('d') => return osScroll!(TextScroll::DownHalf),
+                                    KeyCode::Char('f') => return osScroll!(TextScroll::UpFull),
+                                    KeyCode::Char('b') => return osScroll!(TextScroll::DownFull),
+                                    _ => (),
+                                };
                             };
                             Ok(None)
                         }
-                    event::Event::Mouse(MouseEvent {
+                        Event::Mouse(MouseEvent {
                             kind,
-                        column: _,
+                            column,
-                        row: _,
+                            row,
                             modifiers,
                         }) => {
-                        if self.doc.is_some() {
+                            if let Some(Doc {
-                            eprintln!("{modifiers}");
+                                cache: Some(DocCache { screen, .. }),
-                            let updown = tri_state(
+                                ..
-                                kind.is_scroll_up() && !modifiers.contains(KeyModifiers::SHIFT),
+                            }) = self.doc
-                                kind.is_scroll_down() && !modifiers.contains(KeyModifiers::SHIFT),
+                                && screen.contains(Position::new(column, row))
-                            );
+                            {
-                            let leftright = tri_state(
+                                match kind {
-                                kind.is_scroll_right()
+                                    MouseEventKind::ScrollDown
-                                    || (kind.is_scroll_down()
+                                        if !modifiers.contains(KeyModifiers::SHIFT) =>
-                                        && modifiers.contains(KeyModifiers::SHIFT)),
+                                    {
-                                kind.is_scroll_left()
+                                        return osScroll!(TextScroll::Down(
-                                    || (kind.is_scroll_up()
+                                            TextScroll::SCROLL_STEPS
-                                        && modifiers.contains(KeyModifiers::SHIFT)),
+                                        ));
-                            );
+                                    }
-                            return Ok(Some(Message::TextScroll(updown, leftright)));
+                                    MouseEventKind::ScrollUp
+                                        if !modifiers.contains(KeyModifiers::SHIFT) =>
+                                    {
+                                        return osScroll!(TextScroll::Up(TextScroll::SCROLL_STEPS));
+                                    }
+                                    MouseEventKind::ScrollLeft => {
+                                        return osScroll!(TextScroll::Left(
+                                            TextScroll::SCROLL_STEPS
+                                        ));
+                                    }
+                                    MouseEventKind::ScrollUp
+                                        if modifiers.contains(KeyModifiers::SHIFT) =>
+                                    {
+                                        return osScroll!(TextScroll::Left(
+                                            TextScroll::SCROLL_STEPS
+                                        ));
+                                    }
+                                    MouseEventKind::ScrollRight => {
+                                        return osScroll!(TextScroll::Right(
+                                            TextScroll::SCROLL_STEPS
+                                        ));
+                                    }
+                                    MouseEventKind::ScrollDown
+                                        if modifiers.contains(KeyModifiers::SHIFT) => {}
+                                    _ => {
+                                        return osScroll!(TextScroll::Right(
+                                            TextScroll::SCROLL_STEPS
+                                        ));
+                                    }
+                                }
                             }
                             Ok(None)
                         }
                         _ => Ok(None),
-                },
+                    }
+                }
             }
         }
     }
@@ -421,25 +509,67 @@ impl Doc {
 }
 impl DocCache {
     pub fn new(doc: impl AsRef<Path>) -> io::Result<Self> {
-        read_lines(&doc).map(|(l, content)| Self {
+        read_lines(&doc).map(|((l, m), content)| Self {
             content,
             offset: (0, 0),
-            length_hint: l as _,
+            length_hint: (l as _, m as _),
+            ..Default::default()
         })
     }
     pub fn reload_doc(&mut self, doc: impl AsRef<Path>) -> io::Result<()> {
         let a = read_lines(doc)?; // bail as early as possible
         self.content.clear();
-        let lh;
+        let (lh, m);
-        (lh, self.content) = a;
+        ((lh, m), self.content) = a;
-        self.length_hint = lh as _;
+        self.length_hint = (lh as _, m as _);
         Ok(())
     }
+    fn update_scroll(&mut self, update: TextScroll) {
+        {
+            let bih = get_size_as_ldaformat(&self.screen);
+            let (up, right) = update.to_two_numbers(bih);
+            if up != 0 {
+                self.offset.0 = self
+                    .offset
+                    .0
+                    .saturating_add_signed(-up) // real
+                    .min(self.length_hint.0.saturating_sub(bih.0));
+            };
+            if right != 0 {
+                unreachable!("disabled left right handling from update");
+                self.offset.1 = self
+                    .offset
+                    .1
+                    .saturating_add_signed(right)
+                    .min(self.length_hint.1.saturating_sub(bih.1));
+            };
+        }
+    }
+}
+impl TextScroll {
+    const SCROLL_STEPS: u16 = 3;
+    pub fn to_two_numbers(&self, (height, _width): (u16, u16)) -> (i16, i16) {
+        match self {
+            TextScroll::UpOne => (1, 0),
+            TextScroll::DownOne => (-1, 0),
+            TextScroll::UpHalf => ((height / 2) as _, 0),
+            TextScroll::DownHalf => (-((height / 2) as i16), 0),
+            TextScroll::UpFull => (height as _, 0),
+            TextScroll::DownFull => (-(height as i16), 0),
+            TextScroll::Up(r) => (*r as _, 0),
+            TextScroll::Down(r) => (-(*r as i16), 0),
+            // not ever getting it
+            _ => unreachable!("disabled left right handling from update"),
+            TextScroll::Left(r) => (0, -(*r as i16)),
+            TextScroll::Right(r) => (0, (*r as i16)),
+            TextScroll::LeftOne => (0, -1),
+            TextScroll::RightOne => (0, 1),
+        }
+    }
 }
-
 /// returns some true if real, some false if fake, none if neither,
 /// idk what happens if both
-fn tri_state(real: bool, fake: bool) -> Option<bool> {
+fn _tri_state(real: bool, fake: bool) -> Option<bool> {
     if real {
         Some(true)
     } else if fake {
@@ -449,20 +579,28 @@ fn tri_state(real: bool, fake: bool) -> Option<bool> {
     }
 }
 
+fn get_size_as_ldaformat(r: &Rect) -> (u16, u16) {
+    let Size { height, width } = r.as_size();
+    (height, width)
+}
 /// this works for now
-fn read_lines(doc: impl AsRef<Path>) -> io::Result<(usize, String)> {
+fn read_lines(doc: impl AsRef<Path>) -> io::Result<((usize, usize), String)> {
     let file = File::open(doc)?;
     let lenf = file.metadata()?.len() as _;
     let mut strg = String::with_capacity(lenf);
     let mut fuek = BufReader::with_capacity(lenf, file);
     let mut c = 0;
+    let mut m = 0;
     loop {
-        let r = fuek.read_line(&mut strg)?;
+        let mut str_new = String::new();
+        let r = fuek.read_line(&mut str_new)?;
         if r > 0 {
             c += 1;
+            m = m.max(str_new.len());
+            strg.push_str(&str_new);
         } else {
             break;
         }
     }
-    Ok((c, strg))
+    Ok(((c, m), strg))
 }

src/main.rs

@@ -12,7 +12,7 @@ fn main() -> color_eyre::Result<()> {
     let mut r = ratatui::init();
     let mut exp = FileExplorer::new()?;
     app::App::new()
-        .with_doc("src/main.rs")?
+        .with_doc("src/app.rs")?
         .with_explorer(&mut exp)
         .run(&mut r)?;
     ratatui::restore();