Move caret right

src/app/app_state.rs

@@ -5,6 +5,8 @@ use crate::ui::caret::Caret;
 use crate::ui::file::editor_file::EditorFile;
 use crate::ui::file::*;
 use crate::ui::menu_bar::MenuBar;
+use crate::ui::caret::{CaretPosition, MoveDirection};
+use crate::ui::text_character::TextCharacter;
 use crate::ui::*;
 use sdl2::rect::{Point, Rect};
 use sdl2::VideoSubsystem;
@@ -52,15 +54,29 @@ impl AppState {
         };
         let mut buffer: String = file.buffer();
         let caret: &mut Caret = &mut self.caret;
-        let position: usize = caret.text_position();
-        if position == 0 {
+        let position: CaretPosition = caret.position().clone();
+        if position.text_position() == 0 {
             return;
         }
-        buffer.remove(position - 1);
-        match file.get_character_at(position - 1) {
+        let c: char = buffer.chars().collect::<Vec<char>>()[position.text_position() - 1];
+        buffer.remove(position.text_position() - 1);
+        let position = match c {
+            '\n' => CaretPosition::new(
+                position.text_position() - 1,
+                position.line_number() - 1,
+                0,
+            ),
+            _ => CaretPosition::new(
+                position.text_position() - 1,
+                position.line_number(),
+                position.line_position(),
+            )
+        };
+
+        match file.get_character_at(position.text_position()) {
             Some(character) => {
                 let dest: &Rect = character.dest();
-                caret.move_caret(position - 1, Point::new(dest.x(), dest.y()));
+                caret.move_caret(position, Point::new(dest.x(), dest.y()));
             }
             _ => {
                 caret.reset_caret();
@@ -101,12 +117,16 @@ impl AppState {
             _ => return,
         };
         let mut pos = Point::new(current.dest().x(), current.dest().y());
-        let mut position: usize = caret.text_position();
+        let mut position: CaretPosition = caret.position().clone();
         for character in text.chars() {
-            buffer.insert(position, character);
+            buffer.insert(position.text_position(), character);
             if let Some(rect) = get_text_character_rect(character, renderer) {
                 pos = pos + Point::new(rect.width() as i32, 0);
-                position += 1;
+                position = CaretPosition::new(
+                    position.text_position() + 1,
+                    position.line_number(),
+                    position.line_position(),
+                );
                 caret.move_caret(position, pos.clone());
             }
         }
@@ -115,9 +135,42 @@ impl AppState {
         self.files[self.current_file] = new_file;
     }
 
-//    fn current_file(&self) -> Option<&EditorFile> {
-//        self.files.get(self.current_file)
-//    }
+    pub fn insert_new_line(&mut self, renderer: &mut Renderer) {
+        let file: &mut EditorFile = if let Some(file) = self.files.get_mut(self.current_file) {
+            file
+        } else {
+            return;
+        };
+        let mut buffer: String = file.buffer();
+        let caret: &mut Caret = &mut self.caret;
+
+        let current = match file.get_character_at(caret.text_position()) {
+            Some(c) => c,
+            _ => return,
+        };
+        let mut pos = Point::new(current.dest().x(), current.dest().y());
+        let mut position: CaretPosition = caret.position().clone();
+        buffer.insert(position.text_position(), '\n');
+        if let Some(rect) = get_text_character_rect('\n', renderer) {
+            pos = Point::new(
+                self.config.editor_left_margin(),
+                pos.y() + rect.height() as i32,
+            );
+            position = CaretPosition::new(
+                position.text_position(),
+                position.line_number() + 1,
+                0,
+            );
+            caret.move_caret(position, pos.clone());
+        }
+
+        let new_file = EditorFile::new(file.path(), buffer, self.config.clone());
+        self.files[self.current_file] = new_file;
+    }
+
+    fn current_file(&self) -> Option<&EditorFile> {
+        self.files.get(self.current_file)
+    }
 
     fn current_file_mut(&mut self) -> Option<&mut EditorFile> {
         self.files.get_mut(self.current_file)
@@ -147,6 +200,54 @@ impl AppState {
 
         UpdateResult::NoOp
     }
+
+    pub fn move_caret(&mut self, dir: MoveDirection) {
+        match dir {
+            MoveDirection::Left => {}
+            MoveDirection::Right =>
+                self.move_caret_right(),
+            MoveDirection::Up => {}
+            MoveDirection::Down => {}
+        }
+    }
+
+    fn move_caret_right(&mut self) {
+        let file: &EditorFile = match self.current_file() {
+            None => return,
+            Some(f) => f,
+        };
+        let line = self.caret.line_number().clone();
+        let characters: Vec<&TextCharacter> = match file.get_line(&line) {
+            None =>
+                return,
+            Some(characters) => characters,
+        };
+        let mut idx = 0;
+        for (i, c) in characters.iter().enumerate() {
+            if c.position() == self.caret.text_position() {
+                idx = i + 1;
+                break;
+            }
+        };
+        let text_character: &TextCharacter = match characters.get(idx) {
+            Some(text_character) => text_character,
+            None => return,
+        };
+        let line = text_character.line() - self.caret.line_number();
+        let pos = self.caret
+            .position()
+            .moved(1, line, 0);
+        let mut d: Rect = text_character.dest().clone();
+        if text_character.is_new_line() {
+            let prev = match characters.get(idx - 1) {
+                Some(c) => c,
+                _ => return,
+            };
+            d = prev.dest().clone();
+            d.set_x(d.x() + d.width() as i32);
+        }
+        self.caret.move_caret(pos, Point::new(d.x(), d.y()));
+    }
 }
 
 impl Render for AppState {

src/app/mod.rs

@@ -3,6 +3,7 @@ use crate::config::Config;
 use crate::renderer::Renderer;
 use crate::themes::*;
 use crate::ui::*;
+use crate::ui::caret::{CaretPosition,MoveDirection};
 
 use std::rc::Rc;
 use std::thread::sleep;
@@ -30,10 +31,15 @@ pub enum UpdateResult {
     Stop,
     RefreshPositions,
     MouseLeftClicked(Point),
-    MoveCaret(Rect, usize),
+    MoveCaret(Rect, CaretPosition),
     DeleteFront,
     DeleteBack,
     Input(String),
+    InsertNewLine,
+    MoveCaretLeft,
+    MoveCaretRight,
+    MoveCaretUp,
+    MoveCaretDown,
 }
 
 pub enum Task {
@@ -109,9 +115,23 @@ impl Application {
                     app_state.delete_back();
                 }
                 UpdateResult::Input(text) => {
-                    println!("text input: {}", text);
                     app_state.insert_text(text, &mut renderer);
                 }
+                UpdateResult::InsertNewLine => {
+                    app_state.insert_new_line(&mut renderer);
+                }
+                UpdateResult::MoveCaretLeft => {
+                    app_state.move_caret(MoveDirection::Left);
+                }
+                UpdateResult::MoveCaretRight => {
+                    app_state.move_caret(MoveDirection::Right);
+                }
+                UpdateResult::MoveCaretUp => {
+                    app_state.move_caret(MoveDirection::Up);
+                }
+                UpdateResult::MoveCaretDown => {
+                    app_state.move_caret(MoveDirection::Down);
+                }
             }
             for task in self.tasks.iter() {
                 match task {
@@ -165,6 +185,11 @@ impl Application {
                     match keycode {
                         Keycode::Backspace => return UpdateResult::DeleteFront,
                         Keycode::Delete => return UpdateResult::DeleteBack,
+                        Keycode::KpEnter | Keycode::Return => return UpdateResult::InsertNewLine,
+                        Keycode::Left => return UpdateResult::MoveCaretLeft,
+                        Keycode::Right => return UpdateResult::MoveCaretRight,
+                        Keycode::Up => return UpdateResult::MoveCaretUp,
+                        Keycode::Down => return UpdateResult::MoveCaretDown,
                         _ => UpdateResult::NoOp,
                     };
                 }

src/ui/caret.rs

@@ -7,6 +7,7 @@ use sdl2::pixels::Color;
 use sdl2::rect::{Point, Rect};
 use sdl2::render::Texture;
 use std::rc::Rc;
+use std::ops::Deref;
 
 #[derive(Clone, Debug, PartialEq)]
 enum CaretState {
@@ -15,42 +16,159 @@ enum CaretState {
 }
 
 #[derive(Clone, Debug, PartialEq)]
-pub struct Caret {
-    pending: bool,
+pub enum MoveDirection {
+    Left,
+    Right,
+    Up,
+    Down
+}
+
+//#[derive(Clone, Debug, PartialEq)]
+//pub enum CaretLocation {
+//    FirstLineFirstCharacter,
+//    FirstLine(usize), // with character location
+//    LastLineFirstCharacter,
+//    LastLine(usize), // with character location
+//    FirstCharacter(usize),// with line number
+//    LastCharacter(usize), // with line number
+//    Other(usize, usize), // with line number and character number
+//}
+
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct CaretPosition {
     text_position: usize,
-    blink_delay: u8,
-//    config: Rc<Config>,
-    state: CaretState,
+    line_number: usize,
+    line_position: usize,
+}
+
+impl CaretPosition {
+    pub fn new(text_position: usize, line_number: usize, line_position: usize,) -> Self {
+        Self {
+            text_position,
+            line_number,
+            line_position
+        }
+    }
+
+    pub fn text_position(&self) -> usize {
+        self.text_position.clone()
+    }
+
+    pub fn line_number(&self) -> usize {
+        self.line_number.clone()
+    }
+
+    pub fn line_position(&self) -> usize {
+        self.line_position.clone()
+    }
+
+    pub fn reset(&mut self) {
+        self.text_position = 0;
+        self.line_number = 0;
+        self.line_position = 0;
+    }
+
+    pub fn set_text_position(&mut self, n: usize) {
+        self.text_position = n;
+    }
+
+    pub fn set_line_number(&mut self, n: usize) {
+        self.line_number = n;
+    }
+
+    pub fn set_line_position(&mut self, n: usize) {
+        self.line_position = n;
+    }
+
+    pub fn moved(&self, text_position: usize, line_number: usize, line_position: usize) -> Self {
+        Self {
+            text_position: self.text_position + text_position,
+            line_number: self.line_number + line_number,
+            line_position: self.line_position + line_position
+        }
+    }
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct CaretRenderPosition {
     dest: Rect,
     reset_position: Rect,
-    bright_character_color: Color,
-    blur_character_color: Color,
+}
+
+impl CaretRenderPosition {
+    pub fn dest(&self) -> &Rect {
+        &self.dest
+    }
+
+    pub fn reset_position(&self) -> &Rect {
+        &self.reset_position
+    }
+
+    pub fn reset(&mut self) {
+        self.dest = self.reset_position.clone()
+    }
+
+    pub fn move_to(&mut self, p: &Point) {
+        self.dest.set_x(p.x());
+        self.dest.set_y(p.y());
+    }
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct CaretColor {
+    bright: Color,
+    blur: Color,
+}
+
+impl CaretColor {
+    pub fn bright(&self) -> &Color {
+        &self.bright
+    }
+
+    pub fn blur(&self) -> &Color {
+        &self.blur
+    }
+}
+
+#[derive(Clone, Debug, PartialEq)]
+pub struct Caret {
+    pending: bool,
+    blink_delay: u8,
+    state: CaretState,
+    position: CaretPosition,
+    render_position: CaretRenderPosition,
+    colors: CaretColor,
 }
 
 impl Caret {
     pub fn new(config: Rc<Config>) -> Self {
-        let bright_character_color = config.theme().caret().bright().color().into();
-        let blur_character_color = config.theme().caret().blur().color().into();
+        let bright = config.theme().caret().bright().color().into();
+        let blur = config.theme().caret().blur().color().into();
         Self {
             state: CaretState::Bright,
             blink_delay: 0,
-            dest: Rect::new(
-                config.editor_left_margin(),
-                config.editor_top_margin(),
-                4,
-                0,
-            ),
-            reset_position: Rect::new(
-                config.editor_left_margin(),
-                config.editor_top_margin(),
-                4,
-                0,
-            ),
-            bright_character_color,
-            blur_character_color,
+            render_position: CaretRenderPosition {
+                dest: Rect::new(
+                    config.editor_left_margin(),
+                    config.editor_top_margin(),
+                    4,
+                    0,
+                ),
+                reset_position: Rect::new(
+                    config.editor_left_margin(),
+                    config.editor_top_margin(),
+                    4,
+                    0,
+                ),
+            },
+            colors: CaretColor { bright, blur },
             pending: true,
-            text_position: 0,
-//            config,
+            position: CaretPosition {
+                text_position: 0,
+                line_number: 0,
+                line_position: 0,
+            },
+            //            config,
         }
     }
 
@@ -63,44 +181,48 @@ impl Caret {
     }
 
     pub fn reset_caret(&mut self) {
-        self.dest = self.reset_position.clone();
-        self.text_position = 0;
+        self.render_position.reset();
+        self.position.reset();
     }
 
-    pub fn move_caret(&mut self, position: usize, pos: Point) {
-        self.text_position = position;
-        self.dest.set_x(pos.x());
-        self.dest.set_y(pos.y());
+    pub fn move_caret(&mut self, position: CaretPosition, pos: Point) {
+        self.position = position;
+        self.render_position.move_to(&pos);
     }
 
-    pub fn text_position(&self) -> usize {
-        self.text_position
+    pub fn position(&self) -> &CaretPosition {
+        &self.position
+    }
+}
+
+impl Deref for Caret {
+    type Target = CaretPosition;
+
+    fn deref(&self) -> &<Self as Deref>::Target {
+        self.position()
     }
 }
 
 impl Render for Caret {
     fn render(&mut self, canvas: &mut WindowCanvas, renderer: &mut Renderer) -> UpdateResult {
         if self.pending {
-            use crate::renderer::managers::FontDetails;
-            let config = renderer.config().clone();
-            let font = renderer
-                .font_manager()
-                .load(&FontDetails {
-                    path: config.editor_config().font_path().clone(),
-                    size: config.editor_config().character_size(),
-                })
-                .unwrap_or_else(|_| panic!("Unable to load font"));
-            if let Ok((_, h)) = font.size_of_char('W') {
-                self.dest.set_height(h);
-                self.reset_position = self.dest.clone();
+            if let Some(rect) = get_text_character_rect('W', renderer) {
+                let mut dest = self.render_position.dest().clone();
+                dest.set_height(rect.height());
+                let reset_position = dest.clone();
+                self.render_position = CaretRenderPosition {
+                    dest,
+                    reset_position,
+                };
             }
             self.pending = false;
         }
-        let start = Point::new(self.dest.x(), self.dest.y());
-        let end = Point::new(self.dest.x(), self.dest.y() + self.dest.height() as i32);
+        let dest = self.render_position.dest();
+        let start = Point::new(dest.x(), dest.y());
+        let end = Point::new(dest.x(), dest.y() + dest.height() as i32);
         let color = match self.state {
-            CaretState::Bright => &self.bright_character_color,
-            CaretState::Blur => &self.blur_character_color,
+            CaretState::Bright => self.colors.bright(),
+            CaretState::Blur => self.colors.blur(),
         };
         canvas.set_draw_color(color.clone());
         canvas
@@ -128,6 +250,6 @@ impl ClickHandler for Caret {
     }
 
     fn is_left_click_target(&self, point: &Point) -> bool {
-        is_in_rect(point, &self.dest)
+        is_in_rect(point, &self.render_position.dest())
     }
 }

src/ui/file/editor_file.rs

@@ -48,6 +48,23 @@ impl EditorFile {
         None
     }
 
+    pub fn get_line(&self, line: &usize) -> Option<Vec<&TextCharacter>> {
+        let mut vec: Vec<&TextCharacter> = vec![];
+
+        for section in self.sections.iter() {
+            match section.get_line(line) {
+                Some(v) => vec.append(&mut v.clone()),
+                _ => (),
+            }
+        }
+
+        if vec.is_empty() {
+            None
+        } else {
+            Some(vec)
+        }
+    }
+
     fn refresh_characters_position(&mut self) {
         let mut current: Rect = self.render_position.clone();
         for section in self.sections.iter_mut() {

src/ui/file/editor_file_section.rs

@@ -48,6 +48,21 @@ impl EditorFileSection {
         }
         None
     }
+
+    pub fn get_line(&self, line: &usize) -> Option<Vec<&TextCharacter>> {
+        let mut vec: Vec<&TextCharacter> = vec![];
+        for token in self.tokens.iter() {
+            match token.get_line(line) {
+                Some(v) => vec.append(&mut v.clone()),
+                _ => (),
+            };
+        }
+        if vec.is_empty() {
+            None
+        } else {
+            Some(vec)
+        }
+    }
 }
 
 impl Render for EditorFileSection {

src/ui/file/editor_file_token.rs

@@ -42,6 +42,33 @@ impl EditorFileToken {
         None
     }
 
+    pub fn get_line(&self, line: &usize) -> Option<Vec<&TextCharacter>> {
+        let mut vec: Vec<&TextCharacter> = vec![];
+        for c in self.characters.iter() {
+            let _tmp = (line.clone(), c.line().clone(), self.token_type.is_new_line(), c.text_character());
+            match (line.clone(), c.line().clone(), self.token_type.is_new_line()) {
+                (0, 0, true) => {
+                    vec.push(c);
+                },
+                (a, b, true) if (a + 1) == b => {
+                    vec.push(c);
+                },
+                (a, b, true) if a != (b + 1) =>
+                    (),
+                (a, b, false) if a == b => {
+                    vec.push(c);
+                }
+                _t =>
+                    (),
+            }
+        }
+        if vec.is_empty() {
+            None
+        } else {
+            Some(vec)
+        }
+    }
+
     fn update_view(&mut self, renderer: &mut Renderer) -> UpdateResult {
         let config = renderer.config().theme().code_highlighting();
         let color: Color = match self.token_type {

src/ui/text_character.rs

@@ -1,10 +1,10 @@
 use crate::app::{UpdateResult, WindowCanvas};
 use crate::config::Config;
 use crate::lexer::TokenType;
-use crate::renderer::managers::FontDetails;
-use crate::renderer::managers::TextDetails;
+use crate::renderer::managers::{TextDetails, FontDetails};
 use crate::renderer::Renderer;
 use crate::ui::*;
+use crate::ui::caret::CaretPosition;
 
 use sdl2::pixels::Color;
 use sdl2::rect::{Point, Rect};
@@ -79,7 +79,11 @@ impl TextCharacter {
             .load(&font_details)
             .unwrap_or_else(|_| panic!("Font not found {:?}", font_details));
 
-        if let Some(rect) = get_text_character_rect(self.text_character.clone(), renderer) {
+        let c = match self.text_character {
+            '\n' => 'W',
+            c => c,
+        };
+        if let Some(rect) = get_text_character_rect(c, renderer) {
             self.source = rect.clone();
             self.dest = rect.clone();
         }
@@ -98,7 +102,7 @@ impl TextCharacter {
     }
 
     #[inline]
-    fn is_new_line(&self) -> bool {
+    pub fn is_new_line(&self) -> bool {
         self.text_character == '\n'
     }
 
@@ -110,6 +114,14 @@ impl TextCharacter {
     pub fn position(&self) -> usize {
         self.position
     }
+
+    pub fn line(&self) -> usize {
+        self.line
+    }
+
+    pub fn text_character(&self) -> char {
+        self.text_character.clone()
+    }
 }
 
 impl Render for TextCharacter {
@@ -154,7 +166,14 @@ impl Update for TextCharacter {
 
 impl ClickHandler for TextCharacter {
     fn on_left_click(&mut self, _point: &Point) -> UpdateResult {
-        UpdateResult::MoveCaret(self.dest().clone(), self.position())
+        UpdateResult::MoveCaret(
+            self.dest().clone(),
+            CaretPosition::new(
+                self.position(),
+                self.line(),
+                0,
+            ),
+        )
     }
 
     fn is_left_click_target(&self, point: &Point) -> bool {