This commit is contained in:
2025-11-10 10:55:00 -07:00
parent e1c73eb919
commit bd5c6cc106
6 changed files with 1127 additions and 282 deletions

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343
src/calc.rs Normal file
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use std::{fmt::Display, thread::yield_now};
use evalexpr::*;
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};
use crate::ctx;
// if this is very large at all it will overflow the stack
const LEN: usize = 100;
pub struct Grid {
// a b c ...
// 0
// 1
// 2
// ...
cells: [[Option<Box<dyn Cell>>; LEN]; LEN],
/// (X, Y)
pub selected_cell: (usize, usize),
}
impl std::fmt::Debug for Grid {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("Grid")
.field("cells", &"Too many to print")
.finish()
}
}
impl Grid {
pub fn new() -> Self {
// TODO this needs to be moved to the heap
let b: [[Option<Box<dyn Cell>>; LEN]; LEN] =
core::array::from_fn(|_| core::array::from_fn(|_| None));
Self {
cells: b,
selected_cell: (0, 0),
}
}
pub fn evaluate(&self, mut eq: &str) -> Option<f64> {
if eq.starts_with('=') {
eq = &eq[1..];
} else {
// Should be evaluating an equation
return None
}
let ctx = ctx::CallbackContext::new(&self);
// let mut ctx = HashMapContext::<DefaultNumericTypes>::new();
match eval_with_context(eq, &ctx) {
Ok(e) => {
let val = e.as_float().expect("Should be float");
return Some(val);
}
Err(e) => match e {
EvalexprError::VariableIdentifierNotFound(e) => {
// panic!("Will not be able to parse this equation, cell {e} not found")
return None
}
_ => panic!("{}", e),
},
}
None
}
fn parse_to_idx(i: &str) -> (usize, usize) {
let chars = i
.chars()
.take_while(|c| c.is_alphabetic())
.collect::<Vec<char>>();
let nums = i
.chars()
.skip(chars.len())
.take_while(|c| c.is_numeric())
.collect::<String>();
// get the x index from the chars
let x_idx = chars
.iter()
.enumerate()
.map(Self::char_to_idx)
.fold(0, |a, b| a + b);
// get the y index from the numbers
let y_idx = nums
.parse::<usize>()
.expect("Got non-number character after sorting for just numeric characters");
(x_idx, y_idx)
}
pub fn set_cell<T: Into<Box<dyn Cell>>>(&mut self, cell_id: &str, val: T) {
let loc = Self::parse_to_idx(cell_id);
self.set_cell_raw(loc, val);
}
pub fn set_cell_raw<T: Into<Box<dyn Cell>>>(&mut self, (x,y): (usize, usize), val: T) {
// TODO check oob
self.cells[x][y] = Some(val.into());
}
/// Get cells via text like:
/// A6,
/// F0,
/// etc
pub fn get_cell(&self, cell_id: &str) -> &Option<Box<dyn Cell>> {
let (x, y) = Self::parse_to_idx(cell_id);
self.get_cell_raw(x, y)
}
pub fn get_cell_raw(&self, x: usize, y: usize) -> &Option<Box<dyn Cell>> {
// TODO check oob
&self.cells[x][y]
}
// this function has unit tests
fn char_to_idx((idx, c): (usize, &char)) -> usize {
(c.to_ascii_lowercase() as usize - 97) + 26 * idx
}
fn num_to_char(idx: usize) -> String {
/*
A = 0
AA = 26
AAA = Not going to worry about it yet
*/
let mut word: [char; 2] = [' '; 2];
if idx >= 26 {
word[0]= ((idx/26) + 65 -1) as u8 as char;
}
word[1]= ((idx%26) + 65) as u8 as char;
word.iter().collect()
}
}
impl Default for Grid {
fn default() -> Self {
Self::new()
}
}
pub trait Cell {
/// Important! This is IS NOT the return value of an equation.
/// This is the raw equation it's self.
fn as_raw_string(&self) -> String;
fn can_be_number(&self) -> bool;
fn as_num(&self) -> f64;
fn is_equation(&self) -> bool {
self.as_raw_string().starts_with('=')
}
}
impl Display for dyn Cell {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
let disp = if self.can_be_number() {
self.as_num().to_string()
} else {
self.as_raw_string()
};
write!(f, "{disp}")
}
}
impl Cell for f64 {
fn as_raw_string(&self) -> String {
ToString::to_string(self)
}
fn can_be_number(&self) -> bool {
true
}
fn as_num(&self) -> f64 {
*self
}
}
impl Into<Box<dyn Cell>> for f64 {
fn into(self) -> Box<dyn Cell> {
Box::new(self)
}
}
impl Into<Box<dyn Cell>> for String {
fn into(self) -> Box<dyn Cell> {
Box::new(self)
}
}
impl Cell for String {
fn as_raw_string(&self) -> String {
ToString::to_string(self)
}
fn can_be_number(&self) -> bool {
// checking if the string is an equation
self.starts_with('=')
}
fn as_num(&self) -> f64 {
unimplemented!("&str cannot be used in a numeric context")
}
}
#[test]
fn test_cells() {
let mut grid = Grid::new();
assert!(&grid.cells[0][0].is_none());
grid.set_cell("A0", "Hello".to_string());
assert!(grid.get_cell("A0").is_some());
assert_eq!(
grid.get_cell("A0").as_ref().unwrap().as_raw_string(),
String::from("Hello")
);
}
#[test]
fn c_to_i() {
assert_eq!(Grid::char_to_idx((0, &'a')), 0);
assert_eq!(Grid::char_to_idx((0, &'A')), 0);
assert_eq!(Grid::char_to_idx((0, &'z')), 25);
assert_eq!(Grid::char_to_idx((0, &'Z')), 25);
assert_eq!(Grid::char_to_idx((1, &'a')), 26);
assert_eq!(Grid::parse_to_idx("A0"), (0, 0));
assert_eq!(Grid::parse_to_idx("AA0"), (26, 0));
assert_eq!(Grid::parse_to_idx("A1"), (0, 1));
assert_eq!(Grid::parse_to_idx("A10"), (0, 10));
assert_eq!(Grid::parse_to_idx("Aa10"), (26, 10));
}
#[test]
fn i_to_c() {
assert_eq!(Grid::num_to_char(0).trim(), "A");
assert_eq!(Grid::num_to_char(25).trim(), "Z");
assert_eq!(Grid::num_to_char(26), "AA");
assert_eq!(Grid::num_to_char(51), "AZ");
assert_eq!(Grid::num_to_char(701), "ZZ");
}
impl Widget for &Grid {
fn render(self, area: ratatui::prelude::Rect, buf: &mut ratatui::prelude::Buffer) {
let len = LEN as u16;
let cell_height = 1;
let cell_length = 5;
let x_max = if area.width / cell_length > len {
len - 1
} else {
area.width / cell_length
};
let y_max = if area.height / cell_height > len {
len - 1
} else {
area.height / cell_height
};
for x in 0..x_max {
for y in 0..y_max {
let mut display = String::new();
let mut style = Style::new().white();
const ORANGE1: Color = Color::Rgb(200, 160, 0);
const ORANGE2: Color = Color::Rgb(180, 130, 0);
match (x == 0, y == 0) {
(true, true) => {},
(true, false) => {
// row names
display = y.to_string();
let bg = if y%2==0 {
ORANGE1
} else {
ORANGE2
};
style = Style::new().fg(Color::White).bg(bg);
},
(false, true) => {
// column names
display = Grid::num_to_char(x as usize -1);
let bg = if x%2==0 {
ORANGE1
} else {
ORANGE2
};
style = Style::new().fg(Color::White).bg(bg)
},
(false, false) => {
// minus 1 because of header cells
let x_idx = x as usize -1;
let y_idx = y as usize -1;
if let Some(cell) = self.get_cell_raw(x_idx, y_idx) {
display = cell.as_raw_string();
if cell.can_be_number() {
if let Some(val) = self.evaluate(&cell.as_raw_string()) {
display = val.to_string();
} else {
// broken formulas
if cell.is_equation() {
style = Style::new().underline_color(Color::Red).add_modifier(Modifier::UNDERLINED)
}
}
}
}
if (x_idx, y_idx) == self.selected_cell {
style = Style::new().fg(Color::Black).bg(Color::White);
}
}
}
let area = Rect::new(
area.x + (x * cell_length),
area.y + (y * cell_height),
cell_length,
cell_height,
);
Paragraph::new(display).style(style).render(area, buf);
}
}
}
}

View File

@@ -4,17 +4,16 @@ use evalexpr::{error::EvalexprResultValue, *};
use crate::Grid; use crate::Grid;
pub struct CallbackContext<'a, NumericTypes: EvalexprNumericTypes = DefaultNumericTypes> { pub struct CallbackContext<'a, T: EvalexprNumericTypes = DefaultNumericTypes> {
variables: Rc<&'a Grid>, variables: &'a Grid,
functions: HashMap<String, Function<NumericTypes>>, functions: HashMap<String, Function<T>>,
/// True if builtin functions are disabled. /// True if builtin functions are disabled.
without_builtin_functions: bool, without_builtin_functions: bool,
} }
impl<'a, NumericTypes: EvalexprNumericTypes> CallbackContext<'a, NumericTypes> { impl<'a, NumericTypes: EvalexprNumericTypes> CallbackContext<'a, NumericTypes> {
/// Constructs a `HashMapContext` with no mappings. pub fn new(grid: &'a Grid) -> Self {
pub fn new(grid: Rc<&'a Grid>) -> Self {
Self { Self {
variables: grid, variables: grid,
functions: Default::default(), functions: Default::default(),
@@ -22,55 +21,30 @@ impl<'a, NumericTypes: EvalexprNumericTypes> CallbackContext<'a, NumericTypes> {
} }
} }
/// Removes all variables from the context.
/// This allows to reuse the context without allocating a new HashMap.
///
/// # Example
///
/// ```rust
/// # use evalexpr::*;
///
/// let mut context = HashMapContext::<DefaultNumericTypes>::new();
/// context.set_value("abc".into(), "def".into()).unwrap();
/// assert_eq!(context.get_value("abc"), Some(&("def".into())));
/// context.clear_variables();
/// assert_eq!(context.get_value("abc"), None);
/// ```
pub fn clear_variables(&mut self) { pub fn clear_variables(&mut self) {
() ()
} }
/// Removes all functions from the context.
/// This allows to reuse the context without allocating a new HashMap.
pub fn clear_functions(&mut self) { pub fn clear_functions(&mut self) {
self.functions.clear() self.functions.clear()
} }
/// Removes all variables and functions from the context.
/// This allows to reuse the context without allocating a new HashMap.
///
/// # Example
///
/// ```rust
/// # use evalexpr::*;
///
/// let mut context = HashMapContext::<DefaultNumericTypes>::new();
/// context.set_value("abc".into(), "def".into()).unwrap();
/// assert_eq!(context.get_value("abc"), Some(&("def".into())));
/// context.clear();
/// assert_eq!(context.get_value("abc"), None);
/// ```
pub fn clear(&mut self) { pub fn clear(&mut self) {
self.clear_variables(); self.clear_variables();
self.clear_functions(); self.clear_functions();
} }
} }
impl<'a, NumericTypes: EvalexprNumericTypes> Context for CallbackContext<'a, NumericTypes> { impl<'a> Context for CallbackContext<'a, DefaultNumericTypes> {
type NumericTypes = NumericTypes; type NumericTypes = DefaultNumericTypes;
fn get_value(&self, identifier: &str) -> Option<&Value<Self::NumericTypes>> { fn get_value(&self, identifier: &str) -> Option<Value<Self::NumericTypes>> {
return Some(4.); if let Some(v) = self.variables.get_cell(identifier) {
if v.can_be_number() {
return Some(Value::Float(v.as_num()));
}
}
return None;
} }
fn call_function( fn call_function(
@@ -88,67 +62,8 @@ impl<'a, NumericTypes: EvalexprNumericTypes> Context for CallbackContext<'a, Num
fn set_builtin_functions_disabled( fn set_builtin_functions_disabled(
&mut self, &mut self,
disabled: bool, disabled: bool,
) -> EvalexprResult<(), NumericTypes> { ) -> EvalexprResult<(), Self::NumericTypes> {
self.without_builtin_functions = disabled; self.without_builtin_functions = disabled;
Ok(()) Ok(())
} }
} }
impl<'a, NumericTypes: EvalexprNumericTypes> ContextWithMutableVariables
for CallbackContext<'a, NumericTypes>
{
fn set_value(
&mut self,
identifier: String,
value: Value<Self::NumericTypes>,
) -> EvalexprResult<(), NumericTypes> {
Ok(())
}
fn remove_value(
&mut self,
identifier: &str,
) -> EvalexprResult<Option<Value<Self::NumericTypes>>, Self::NumericTypes> {
// Removes a value from the `self.variables`, returning the value at the key if the key was previously in the map.
// Ok(self.variables.remove(identifier))
todo!();
}
}
impl<'a, NumericTypes: EvalexprNumericTypes> ContextWithMutableFunctions
for CallbackContext<'a, NumericTypes>
{
fn set_function(
&mut self,
identifier: String,
function: Function<NumericTypes>,
) -> EvalexprResult<(), Self::NumericTypes> {
self.functions.insert(identifier, function);
Ok(())
}
}
impl<'b, NumericTypes: EvalexprNumericTypes> IterateVariablesContext for CallbackContext<'b, NumericTypes> {
type VariableIterator<'a>
= std::iter::Map<
std::collections::hash_map::Iter<'a, String, Value<NumericTypes>>,
fn((&String, &Value<NumericTypes>)) -> (String, Value<NumericTypes>),
>
where
Self: 'a;
type VariableNameIterator<'a>
= std::iter::Cloned<std::collections::hash_map::Keys<'a, String, Value<NumericTypes>>>
where
Self: 'a;
fn iter_variables(&self) -> Self::VariableIterator<'_> {
todo!()
// self.variables.iter().map(|(string, value)| (string.clone(), value.clone()))
}
fn iter_variable_names(&self) -> Self::VariableNameIterator<'_> {
todo!()
// self.variables.keys().cloned()
}
}

View File

@@ -1,205 +1,198 @@
// #![feature(impl_trait_in_bindings)]
mod calc;
mod ctx; mod ctx;
use std::rc::Rc; use std::io;
use evalexpr::*; use ratatui::{
crossterm::event,
layout::{Constraint, Layout},
text::*,
widgets::{Paragraph, Widget},
*,
};
// if this is very large at all it will overflow the stack use crate::calc::Grid;
const LEN: usize = 100;
struct Grid {
// a b c ...
// 0
// 1
// 2
// ...
cells: [[Option<Box<dyn Cell>>; LEN]; LEN],
}
impl std::fmt::Debug for Grid {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("Grid").field("cells", &"Too many to print").finish()
}
}
impl Grid {
fn new() -> Self {
let b: [[Option<Box<dyn Cell>>; LEN]; LEN] =
core::array::from_fn(|_| core::array::from_fn(|_| None));
Self { cells: b }
}
fn eval(&self, mut eq: &str) -> f64 {
if eq.starts_with('=') {
eq = &eq[1..];
}
let mut ctx = ctx::CallbackContext::<DefaultNumericTypes>::new(Rc::new(self));
// let mut ctx = HashMapContext::<DefaultNumericTypes>::new();
let val;
loop {
match eval_with_context(eq, &ctx) {
Ok(e) => {
val = e.as_float().expect("Should be float");
break;
}
Err(e) => match e {
// TODO this is kinda a slow way to do this, the equation will get parsed
// multiple times. Might be good to modify the lib so that you can provide
// a callback for variables that are not found.
EvalexprError::VariableIdentifierNotFound(e) => {
panic!("Will not be able to parse this equation, cell {e} not found")
}
_ => panic!("{}", e),
},
}
}
val
}
fn parse_to_idx(i: &str) -> (usize, usize) {
let chars = i
.chars()
.take_while(|c| c.is_alphabetic())
.collect::<Vec<char>>();
let nums = i
.chars()
.skip(chars.len())
.take_while(|c| c.is_numeric())
.collect::<String>();
// get the x index from the chars
let x_idx = chars
.iter()
.enumerate()
.map(Self::char_to_idx)
.fold(0, |a, b| a + b);
// get the y index from the numbers
let y_idx = nums
.parse::<usize>()
.expect("Got non-number character after sorting for just numeric characters");
(x_idx, y_idx)
}
fn set_cell(&mut self, cell_id: &str, val: Box<dyn Cell>) {
let (x, y) = Self::parse_to_idx(cell_id);
// TODO check oob
self.cells[x][y] = Some(val);
}
/// Get cells via text like:
/// A6
/// F0
fn get_cell(&self, cell_id: &str) -> &Option<Box<dyn Cell>> {
let (x, y) = Self::parse_to_idx(cell_id);
// TODO check oob
&self.cells[x][y]
}
// this function has unit tests
fn char_to_idx((idx, c): (usize, &char)) -> usize {
(c.to_ascii_lowercase() as usize - 97) + 26 * idx
}
}
impl Default for Grid {
fn default() -> Self {
Self::new()
}
}
trait Cell {
fn to_string(&self) -> String;
fn can_be_number(&self) -> bool;
fn as_num(&self) -> f32;
fn is_eq(&self) -> bool {
self.to_string().starts_with('=')
}
}
impl Cell for f32 {
fn to_string(&self) -> String {
ToString::to_string(self)
}
fn can_be_number(&self) -> bool {
true
}
fn as_num(&self) -> f32 {
*self
}
}
impl Cell for &str {
fn to_string(&self) -> String {
ToString::to_string(self)
}
fn can_be_number(&self) -> bool {
// checking if the string is an equation
self.starts_with('=')
}
fn as_num(&self) -> f32 {
unimplemented!("&str cannot be used in a numeric context")
}
}
#[test] #[test]
fn test_math() { fn test_math() {
use evalexpr::*;
let mut grid = Grid::new(); let mut grid = Grid::new();
grid.set_cell("A0", Box::new(2.)); grid.set_cell("A0", 2.);
grid.set_cell("B0", Box::new(1.)); grid.set_cell("B0", 1.);
grid.set_cell("C0", Box::new("=A0+B0")); grid.set_cell("C0", "=A0+B0".to_string());
assert_eq!(eval("1+2").unwrap(), Value::Int(3)); assert_eq!(eval("1+2").unwrap(), Value::Int(3));
let disp = &grid.get_cell("C0"); let cell_text = &grid.get_cell("C0");
if let Some(inner) = disp { if let Some(text) = cell_text {
if inner.is_eq() { if text.is_equation() {
println!("{}", inner.to_string()); println!("{}", text.as_raw_string());
let display = grid.eval(&inner.to_string()); let display = grid.evaluate(&text.as_raw_string());
assert_eq!(display, 3.); assert_eq!(display, Some(3.));
return; return;
} }
} }
panic!("Should've found the value and returned"); panic!("Should've found the value and returned");
} }
#[test] fn main() -> Result<(), std::io::Error> {
fn test_cells() { let term = ratatui::init();
let mut grid = Grid::new(); let mut app = App::new();
app.grid.set_cell("A0", 10.);
app.grid.set_cell("B1", 10.);
app.grid.set_cell("C2", "=A0+B1".to_string());
assert!(&grid.cells[0][0].is_none()); let res = app.run(term);
grid.set_cell("A0", Box::new("Hello")); ratatui::restore();
assert!(grid.get_cell("A0").is_some()); return res;
assert_eq!(
grid.get_cell("A0").as_ref().unwrap().to_string(),
String::from("Hello")
);
} }
#[test] struct App {
fn c_to_i() { exit: bool,
assert_eq!(Grid::char_to_idx((0, &'a')), 0); grid: Grid,
assert_eq!(Grid::char_to_idx((0, &'A')), 0); /// Buffer for key-chords
assert_eq!(Grid::char_to_idx((0, &'z')), 25); chord_buf: String,
assert_eq!(Grid::char_to_idx((0, &'Z')), 25); editor: Option<Editor>,
assert_eq!(Grid::char_to_idx((1, &'a')), 26);
assert_eq!(Grid::parse_to_idx("A0"), (0, 0));
assert_eq!(Grid::parse_to_idx("AA0"), (26, 0));
assert_eq!(Grid::parse_to_idx("A1"), (0, 1));
assert_eq!(Grid::parse_to_idx("A10"), (0, 10));
assert_eq!(Grid::parse_to_idx("Aa10"), (26, 10));
} }
fn main() { impl Widget for &App {
println!("Only tests exist atm"); fn render(self, area: prelude::Rect, buf: &mut prelude::Buffer) {
Paragraph::new("Status").render(area, buf);
}
}
impl App {
fn new() -> Self {
Self {
exit: false,
grid: Grid::new(),
chord_buf: String::new(),
editor: None,
}
}
fn run(&mut self, mut term: DefaultTerminal) -> Result<(), std::io::Error> {
while !self.exit {
term.draw(|frame| self.draw(frame))?;
self.handle_events()?;
}
Ok(())
}
fn draw(&self, frame: &mut Frame) {
let layout = Layout::default()
.direction(layout::Direction::Vertical)
.constraints([
Constraint::Length(1),
Constraint::Min(1),
Constraint::Length(1),
])
.split(frame.area());
if let Some(editor) = &self.editor {
frame.render_widget(editor, layout[0]);
} else {
frame.render_widget(Paragraph::new("sc_rs"), layout[0]);
}
frame.render_widget(&self.grid, layout[1]);
frame.render_widget(self, layout[2]);
}
fn handle_events(&mut self) -> io::Result<()> {
match event::read()? {
event::Event::Key(key_event) => match key_event.code {
event::KeyCode::Enter => {
if let Some(editor) = &self.editor {
let loc= self.grid.selected_cell;
let val = editor.buf.trim().to_string();
// insert as number if at all possible
if let Ok(val) = val.parse::<f64>() {
self.grid.set_cell_raw(loc, val);
} else {
self.grid.set_cell_raw(loc, val);
};
self.editor = None;
}
}
event::KeyCode::Backspace => {
if let Some(editor) = &mut self.editor {
editor.buf.pop();
}
}
event::KeyCode::F(_) => todo!(),
event::KeyCode::Char(c) => {
if let Some(editor) = &mut self.editor {
editor.buf += &c.to_string();
return Ok(());
}
if !self.chord_buf.is_empty() {}
match c {
'q' => self.exit = true,
// <
'h' => self.grid.selected_cell.0 = self.grid.selected_cell.0.saturating_sub(1),
// v
'j' => self.grid.selected_cell.1 = self.grid.selected_cell.1.saturating_add(1),
// ^
'k' => self.grid.selected_cell.1 = self.grid.selected_cell.1.saturating_sub(1),
// >
'l' => self.grid.selected_cell.0 = self.grid.selected_cell.0.saturating_add(1),
// edit cell
'i' | 'a' => {
let (x,y) = self.grid.selected_cell;
let starting_val = if let Some(val) = self.grid.get_cell_raw(x, y) {
val.as_raw_string()
} else {
String::new()
};
self.editor = Some(Editor::from(starting_val))
},
'I' => {/* insert col before */}
'A' => {/* insert col after */}
'o' => {/* insert row below */}
'O' => {/* insert row above */}
':' => {/* enter command mode */}
c => {
// start entering c for words
self.chord_buf += &c.to_string();
}
}
},
_ => {}
},
_ => {}
event::Event::Paste(_) => todo!(),
event::Event::Resize(_, _) => todo!(),
}
Ok(())
}
}
struct Editor {
buf: String,
cursor: usize,
}
impl From<String> for Editor {
fn from(value: String) -> Self {
Self {
buf: value.to_string(),
cursor: value.len(),
}
}
}
impl Widget for &Editor {
fn render(self, area: prelude::Rect, buf: &mut prelude::Buffer) {
Paragraph::new(self.buf.clone()).render(area, buf);
}
} }